JP3244281U - Trance - Google Patents

Abstract

The present invention provides a transformer equipped with a wiring plug connector, which is capable of protecting a secondary circuit of the transformer and an electric device connected to the wiring plug connector from overcurrent. [Solution] The present invention includes a plurality of stacked iron cores 2, primary and secondary coils 3a and 3b wound around a bundle 20 of stacked iron cores 2, and electricity input from the primary side. The transformer 1 transforms the voltage and outputs it to the secondary side, and includes at least one output terminal 31b that outputs electricity at a target voltage and a 0 volt terminal 30b as the secondary side terminal 3n of the transformer 1. Separately from the side terminal 3n, a wiring plug-in connector 6 is provided that can connect a plug of an electrical device to the secondary side of the transformer 1, and the wiring plug-in connector 6 connects to the transformer via the breaker k1. It is provided on the secondary side of 1. [Selection diagram] Figure 4

Description

The present invention relates to improvements in transformers.

In order to use a sequencer or inverter with a 100V (volt) specification for a 200V main power supply in a control panel, instrumentation panel, etc., a transformer is required to convert the voltage to 100V.
While the above-mentioned transformers are required to be space-saving, i.e., downsized, there is already a demand for one that is equipped with an outlet (service outlet) that can temporarily connect to the transformer and supply electricity to equipment used. A transformer equipped with an outlet has been proposed (Patent Document 1).

In the transformer shown in Patent Document 1, a toroidal transformer main body 6 is housed in a cylindrical case 5, and a gap G between the case 5 and the transformer main body 6 is filled with a filler 7. Forms a molded part A that tightly fixes the transformer body 6 and the cylindrical case 5 together and covers the entire outer peripheral surface of the transformer body 6 without leakage. Commercial power is supplied to the primary coil 601 of the transformer body 6 via the main power supply line 3, and the secondary coil 602 of the transformer body 6 is supplied with commercial power. By employing a configuration in which the output outlet section 10 is connected (claim 1 and abstract), the present invention aims to reduce the weight and size and provide the above-mentioned outlet.

Specifically, the transformer described in Patent Document 1 includes a toroidal transformer body formed by winding primary and secondary coils around a ring-shaped core, a cylindrical case housing the transformer body, and the transformer body. a filler that is filled into the gap between the transformer body and the cylindrical case and tightly fixes the transformer body and the cylindrical case together; a main power supply line that supplies external power to the primary coil; A power transformer is disclosed (claim 1) characterized in that it comprises an output outlet section for outputting secondary power, and a terminal provided outside the cylindrical case and connected in parallel to the output outlet section. A power transformer is disclosed which includes an output terminal block having an output terminal block and a mounting means for removably attaching the output terminal block to the surface of a cylindrical case (claim 2), the power supply having a portable handle on the cylindrical case. It is a transformer (Claim 3).

On the other hand, there is a need for a means to protect electrical equipment connected to the outlet from overcurrent.
Therefore, in Patent Document 1, external power (commercial power) is supplied to the primary coil 601 of the transformer body 6 via the main power supply line 3, and a primary fuse 8 is provided in the middle of the main power supply line 3. The primary fuse 8 is housed in a fuse holder 800, and the three secondary coils 602 of the transformer body 6 are each connected to an output outlet 10 via a secondary fuse 9. It is described that three output outlet sections 10 are connected, that is, three output outlet sections 10 are provided, and each output outlet section 10 outputs the secondary power generated in the secondary coil 602 to an external game machine etc. (Paragraphs 0017 and 0018 of Patent Document 1 and FIG. 2).

However, the fuse shown in Patent Document 1, which is used as a means to protect the electrical equipment connected to the outlet from overcurrent, interrupts the current to the electrical equipment by destroying the fuse itself, and it is difficult to restore the electrical equipment. This required the hassle of replacing the destroyed fuse with a new one.

Utility Model Publication No. 7-27133

The present invention aims to solve the above problems.
In particular, the present invention (the present invention according to claim 3) uses an earth leakage breaker on the secondary side of the transformer to detect earth leakage and protect the transformer's electrical circuit, while also preventing weak overcurrents that cannot be detected by the breaker. This is intended to protect electrical equipment connected to the transformer wiring plug connector.

Therefore, the present invention consists of a plurality of stacked iron cores, primary and secondary coils wound around the bundle of stacked iron cores, and transforms the electricity input from the primary side and outputs it to the secondary side. A transformer that
The transformer has at least one output terminal that outputs electricity at a target voltage and a 0 volt terminal as a secondary terminal of the transformer, and a plug of an electrical device is connected to the secondary side of the transformer separately from the secondary terminal. The present invention provides a transformer comprising a wiring plug-in connector capable of connecting the wiring plug-in connector, and the wiring plug-in connector is provided to the secondary side of the transformer via a breaker.
Further, the present invention provides a transformer in which the breaker is an earth leakage breaker, and a circuit protector is provided on the secondary side of the transformer to protect the electrical equipment connected to the wiring plug connector. .
Further, in the present invention, in the single-phase transformer, the 0-volt terminal is directly or indirectly grounded to the iron core, and the circuit protector is electrically connected to the output terminal and the wiring plug connector. The earth leakage breaker is connected between a current flowing between the circuit protector and the voltage side of the wiring plug connector, and the grounded 0 volt terminal and the wiring plug. The device detects the difference between the current flowing between the 0 volt side of the connector and cuts off the circuit on the secondary side of the transformer, and includes a binding member that binds together the plurality of stacked iron cores. At least the secondary side terminal, the wiring plug connector, the earth leakage breaker, and the circuit protector are attached directly or indirectly to the binding member, and the binding member is attached to at least the secondary side terminal and the wiring connector. A transformer supporting the plug-in connector, the earth leakage breaker, and the circuit protector could be provided.
Furthermore, in the present invention, at least the secondary side terminal is housed in a secondary side terminal block made of resin, and the wiring plug connector has two conductive electrodes on the voltage side and the 0 volt side. The wiring plug connector is a two-prong outlet with a plug into which the blade of the plug of an electrical device is directed toward the conductive electrode, and the wiring plug connector is connected to the ground leakage connector. A breaker is a single unit installed in a substantially rectangular parallelepiped case, and the front and rear widths of the case are smaller than the left and right widths of the case, and the breaker can be inserted into the case. The unit is provided with a voltage side terminal and a 0 volt side blade of the unit itself, which are electrically connected to the conductive electrode, and which are separate from the plug, to a voltage side terminal and a 0 volt side terminal, respectively. The circuit protector is also provided with two blades as connection terminals, the circuit protector is fixed in a resin housing separate from the circuit protector, and the housing is connected to the two blades of the circuit protector. the output terminal and the connection terminal on the input side among the connection terminals of the circuit protector are connected, and the connection terminal on the output side among the connection terminals of the circuit protector is connected. and the voltage side terminal of the unit are connected, and the 0 volt terminal and the 0 volt side terminal of the unit are connected, and the binding member includes the iron core inside the bundle of iron cores. a shaft portion that passes along the stacking direction of the iron cores; a seat portion that is provided on the shaft portion and is disposed on the front side and the rear side of the bundle of iron cores with the stacking direction of the iron cores as the front-rear direction; at least two holding plates disposed on the front side and the rear side of the bundle of iron cores, at least one of the seat portions is formed separately from the shaft portion and attached to one end of the shaft portion, The bundle of iron cores is held between the other one of the seat portions via the holding plate, and the holding plate is penetrated by the shaft portion and is between at least one of the seat portions and the bundle of iron cores. By being fixed, the holding plate is arranged on the front side or the rear side of the bundle of iron cores, and at least the holding plate placed on the front side of the bundle of iron cores uses itself as a guide or the holding plate A separate support is provided as a guide, and the terminal block, the unit, and the circuit protector of the secondary side terminal are attached to the guide, so that the secondary side terminal, the unit, and the circuit protector are connected to each other. The guide is disposed on the front side of the bundle of iron cores, and the guide is a plate-shaped body whose length extends in the left-right direction of the transformer. It was possible to provide a transformer with a locking section that is held in a penetrating state.
Furthermore, in the present invention, in the front view of the transformer, the bundle of iron cores has through holes spaced apart from each other through which the bundle of stacked iron cores can be penetrated and the shaft portion of the binding member can be inserted therethrough. is provided in at least two places by opening the shaft, a male screw is provided on the shaft portion, a female screw is provided on the seat portion formed separately from the shaft portion, and the female screw is provided in at least two places on the shaft portion. By screwing into a male screw, the seat portion formed separately from the shaft portion can be attached to the shaft portion, and the holding plate is a plate-shaped body extending to the left and right of the transformer, and the holding plate each includes at least two through holes provided at each of both ends in the longitudinal direction of the holding plate, and the shaft portion of the fastening member is passed through each of the through holes together with the through hole, and is separate from the shaft portion. The seat portion of the body is screwed onto the shaft portion, and the holding plate arranged on the front side of the bundle of iron cores serves as the guide and has a substantially L-shaped cross section as the locking section. The holding plate is a plate-like body having an angular section and extending from side to side, and the holding plate disposed on the front side of the bundle of iron cores extends from the supporting plate to one side of the angled section in the left-right direction. A shelf-like unit arrangement part that projects forward is provided, and the unit arrangement part projects further forward than the angle-shaped section, and the front and rear widths of the unit arrangement part are equal to the front and rear widths of the case. The left and right widths of the unit placement portion are approximately equal to the left and right widths of the case, and the upper surface of the unit placement portion is a placement surface on which the unit is placed. , the mounting surface has an opening that vertically penetrates the unit placement portion as a connection opening for passing each blade on the voltage side and 0 volt side of the unit; and an opening that vertically penetrates the unit placement portion and an alignment portion provided at at least one location on the placement surface, the alignment portion being a penetrating portion that vertically penetrates the unit placement portion, or a positioning portion provided on the placement surface. The front end of the unit placement portion is provided with a blinding portion extending downward at least in front of the opening, and the blinding portion is configured to cover the voltage side terminal of the unit and the The 0-volt side terminal is hidden, and the left and right ends of the unit placement part are opened at the bottom, and the lower part is a non-blind part without the blind part, and the non-blind part is at least left and right. In a side view of one transformer, the voltage side terminal and the 0 volt side terminal of the unit are visible, and the unit is connected to the wiring plug-in connection to at least one of the top surface, side surface, and front surface of the case. and the voltage side terminal and the 0 volt side terminal are provided at the bottom of the case, and the case further includes at least one protrusion projecting downward to the bottom, and the case is When placed on the placement surface of the unit placement portion, the protrusion fits into the alignment portion, and the opening extends downward from the unit placement portion to the voltage side terminal and the 0 volt side terminal. and at least the terminal block on the secondary side has a substantially L-shaped cross section through which the angular section of the holding plate disposed on the front side of the bundle of iron cores can pass. and a housing separate from both the case and the circuit protector, the circuit protector being fixed within the housing, and the housing having the retainer disposed on the front side of the bundle of iron cores. an insertion portion having an L-shaped cross section through which the angular section of the plate can pass, and inserting the angular section of the holding plate disposed on the front side of the bundle of iron cores into the insertion portion; By doing so, the casing is attached to the holding plate arranged on the front side of the bundle of iron cores, and the housing is attached to the holding plate arranged on the front side of the bundle of iron cores, and the housing is attached to the holding plate arranged on the front side of the bundle of iron cores, and the By inserting the angled section of the holding plate, the terminal block on the secondary side is attached to the holding plate arranged on the front side of the bundle of iron cores, and in the left and right direction, the casing The bottom of the housing is opened to expose each of the connection terminals of the circuit protector, and the connection between the output terminal and the input side of the circuit protector is arranged between the side terminal block and the unit. The terminal is connected by soldering a first conducting wire covered with an insulating material, and the connecting terminal on the output side of the circuit protector and the voltage side terminal of the unit are connected to the first conducting wire covered with an insulating material. The 0 volt terminal and the 0 volt side terminal of the unit are connected by soldering a third conducting wire covered with an insulating material, and the unit At least the connection of the first and second conductive wires provided a transformer fixed to the unit arrangement portion.
Further, in the present invention, the bundle of iron cores has through holes spaced apart from each other in a front view of the transformer, through holes through which the bundle of stacked iron cores can be penetrated and the shaft portion of the binding member can be inserted. The shaft portion is provided with male screws in at least two places, the seat portion formed separately from the shaft portion is provided with female screws, and the female screws are connected to the male screws of the shaft portion. By screwing into the screw, the seat portion formed separately from the shaft portion can be attached to the shaft portion, and the holding plate is a plate-shaped body extending to the left and right of the transformer, Each is provided with at least two through holes provided at each of both ends in the longitudinal direction of the holding plate, and the shaft portion of the fastening member is passed through each of the through holes together with the through hole, and is separated from the shaft portion. The seat portion is screwed onto the shaft portion, and at least two fastening holes are provided at positions different from the through holes on the front surface of the holding plate disposed on the front side of the bundle of iron cores, Both fastening holes are provided in the holding plate at different positions from the through holes and spaced apart from each other, and the holding plate is provided on the front surface of the holding plate arranged on the front side of the bundle of iron cores. A support plate extending left and right along the longitudinal direction is arranged as the guide, and the support plate has a plate shape extending left and right and includes an angular section having a substantially L-shaped cross section as the locking section. The support plate is provided with a shelf-shaped unit arrangement portion protruding forward from the support plate next to one of the angle-shaped sections in the left-right direction, and the unit arrangement portion is provided with a shelf-like unit arrangement portion protruding forward from the support plate. It protrudes forward from the section, and the front and rear widths of the unit placement portion are approximately equal to the front and rear widths of the case, and the left and right widths of the unit placement portion are equal to the left and right widths of the case. The upper surface of the unit placement part is a mounting surface on which the unit is placed, and the mounting surface is a connection opening through which each blade on the voltage side and 0 volt side of the unit passes. an opening that vertically penetrates the unit placement section; an opening that vertically passes through the unit placement section; and an alignment section provided at at least one location on the placement surface, the alignment section is a penetrating portion that vertically penetrates the unit placement portion, or a recess provided in the placement surface, and the front end of the unit placement portion extends downward at least in front of the opening. A blindfold part is provided, and the blindfold part hides the voltage side terminal and the 0 volt side terminal of the unit when the transformer is viewed from the front, and the left and right ends of the unit arrangement part are open at the bottom and The lower part is a non-blind part without the blind part, and the non-blind part is such that the voltage side terminal and the 0 volt side terminal of the unit can be visually recognized at least in a side view of one of the left and right transformers. , the unit includes the insertion port of the wiring connector on at least one of the top surface, side surface, and front surface of the case, and connects the voltage side terminal and the 0 volt side terminal to the bottom of the case. The case further includes at least one protrusion that protrudes downward to the bottom, and when the case is placed on the placement surface of the unit placement part, the protrusion extends toward the alignment part. fitted, the opening exposes the voltage side terminal and the 0 volt side terminal downward from the unit placement part, and at least the secondary side terminal block passes through the angled section of the support plate. a housing separate from both the case and the circuit protector, the circuit protector being fixed within the housing, and the housing comprising: The casing includes an insertion portion having an L-shaped cross section through which the angled section of the support plate can pass, and by inserting the angled section of the support plate into the insertion portion, the casing The terminal block on the secondary side is attached to the angle section of the support plate, and the angled section of the support plate is inserted into the insertion part of the terminal block on the secondary side, so that the terminal block on the secondary side is attached to the angle section of the support plate. The casing is installed between the terminal block on the secondary side and the unit in the left-right direction, and the bottom of the casing is opened to connect the connection terminal of the circuit protector. are respectively exposed, and insertion holes are provided at both ends of the support plate, respectively, passing through the support plate in the front and back, and fasteners such as screws are passed through the insertion holes and the fastening holes. , the support plate is fixed to the front surface of the holding plate disposed on the front side of the bundle of iron cores, and the output terminal and the connection terminal on the input side of the circuit protector are connected to a first terminal covered with an insulating material. The connection terminal on the output side of the circuit protector and the voltage side terminal of the unit are connected by soldering a second conductor wire covered with an insulating material, The 0 volt terminal and the 0 volt side terminal of the unit are connected by soldering a third conductive wire covered with an insulating material, and the unit A transformer fixed to the unit arrangement part could be provided by wiring.
In addition to screws, the fasteners such as screws include well-known fixing means such as bolts, nuts, and rivets.
Further, in the present invention, the upper surface of the circuit protector is provided with a protruding shaft that protrudes upward and has a male thread on the outer circumferential surface, and an annular fixing member formed separately from the circuit protector. The inner circumferential surface of the fixing member is provided with a female thread that can be screwed into the male thread, and the casing is provided with a hole in the upper surface that passes through the casing vertically, and the hole is larger than the diameter of the protruding shaft. The circuit protector, which has an inner diameter larger than the outer diameter of the fixing member and is housed in the housing, has the protruding shaft protrude from the upper surface of the housing through the hole, and the fixing member is attached to the outside of the housing. The circuit protector is fixed to the casing by screwing the female thread of the member into the male thread of the protruding shaft, and the rear side of the iron core bundle has at least one terminal as the primary terminal. The present invention has provided a transformer having two input terminals, a 0 volt terminal on the primary side, and a light emitting diode provided on the primary side of the transformer as an energization lamp to indicate the energization state.

The present invention improves the convenience of the transformer by providing a wiring plug connector (outlet) to the transformer. On the premise that the wiring plug-in connector is provided, the present invention protects electrical equipment connected to the wiring plug-in connector from overcurrent using a breaker. As a means of protecting electrical equipment connected to a wiring plug-in connector, the present invention in particular provides a breaker on the secondary side of the transformer to facilitate restoration. In other words, the breaker that automatically cut off the current can be restored to its original state by operating the breaker, and there is no need to replace it with a new one like a fuse every time an overcurrent occurs. I don't.
Although it is not excluded to provide a breaker on the primary side of the transformer, in practical terms, installing a breaker only on the secondary side can protect the electrical equipment connected to the wiring plug-in connector. By installing a breaker only on the secondary side, there is no need to identify the breaker that requires restoration (primary side or secondary side) during restoration, and only a single breaker (on the secondary side) can be operated. This made it possible to restore the state to the state before the overcurrent occurred.

Furthermore, in the transformer of the present invention according to claim 2, by using the breaker as an earth leakage breaker, the breaker can be activated upon detection of earth leakage, and by providing a circuit protector, it is mainly possible to prevent overload in the electric equipment. It can detect current abnormality and automatically cut off the current.
A breaker detects overcurrent of all loads generated downstream from the power supply, and its rated current range is different from that of a circuit protector. A circuit protector can interrupt a relatively small current of, for example, 0.05A, and a breaker can interrupt a higher current.
In other words, the above-mentioned breaker protects the electrical circuit by controlling all the electrical wires and circuits on the load side (secondary side), while the circuit protector protects the connection to the wiring plug-in connector from weak currents that do not activate the breaker. protect electrical equipment that has been exposed to
As mentioned above, once an overcurrent occurs in a fuse, its function ends and it must be replaced. For this reason, when comparing circuit protectors and the fuses mentioned above, fuses that require replacement are not suitable for equipment that is frequently turned on and off, whereas circuit protectors allow the flow of a strong destructive current. Unless otherwise specified, it is suitable for long-term use as it not only turns the main power on and off but also protects the circuit. Furthermore, circuit protectors can be restored and used continuously once the current value or voltage reaches a stable state, so they are more economical than fuses that need to be replaced.

Furthermore, in the present invention according to claim 3, at least the secondary side terminal, the wiring plug connector, the earth leakage breaker, and the circuit protector are attached to the transformer using a binding member that binds the plurality of stacked iron cores. This eliminates the need to take additional measures to attach the wiring plug connector, earth leakage breaker, and circuit protector to the transformer in addition to the secondary side terminal. In particular, a smaller transformer can be provided by eliminating the need for a case that covers the entire transformer as shown in Patent Document 1 in order to provide a wiring plug-in connector in the transformer. Furthermore, since the case that covers the entire transformer is not required, heat dissipation means such as a filler for dissipating heat from the iron core and coil are also unnecessary.

Furthermore, the transformer of the present invention according to claim 4 uses a unit in which the wiring plug connector and the earth leakage breaker are housed in one case, that is, an outlet (outlet unit) equipped with the earth leakage breaker. The output terminal, the unit, and the circuit protector to be wired are collectively attached to a guide that is a part of the binding member of the core, thereby making the wire connection easier. Commercially available circuit breakers themselves do not have means for attachment to the fastening member of the transformer. However, by housing a commercially available circuit breaker in the above-mentioned housing, the circuit breaker can be installed on the secondary side by using the locking section of the guide for attaching the terminal block of the secondary side terminal and passing the above-mentioned housing through the locking section. This allows it to be installed on the transformer together with side terminals.

Furthermore, in the present invention according to claim 5, the holding plate disposed on the front side of the bundle of iron cores is provided with an angular section for mounting the terminal block of the secondary side terminal and the above-mentioned housing, and the above-mentioned unit is provided. By providing a unit arranging section for arranging the transformer, a concrete means for simply and reliably providing the terminal block of the secondary side terminal, the unit, and the circuit protector to the transformer is provided.

Further, the present invention according to claim 6 can provide a more specific means for simply and reliably installing the terminal block of the secondary side terminal, the above-mentioned unit, and the circuit protector in the transformer.
That is, in the present invention according to claim 6, the supporting plate separate from the holding plate is used as a guide, and the supporting body is used as a guide for the terminal block of the secondary side terminal and the angular section where the housing is mounted, and By providing a unit arranging section for arranging the units, the degree of freedom in designing the guide is increased without being restricted by the original purpose of the holding plate, which is to hold down the iron core. On the other hand, with regard to the holding plate, the existing holding plate can be used as is by adding processing to the extent of forming an insertion hole.
In particular, in the present invention according to claims 5 and 6, by fitting the protrusion into the positioning part, the unit is appropriately arranged in the unit arrangement part, and the arrangement is made immovable by the connection, so that the transformer The above unit can be securely fixed without compromising its compactness.

Further, in the present invention according to claims 5 and 6, the voltage side terminal and the 0 volt side terminal of the unit are hidden by the blind part of the unit arrangement part, so that a person can access both terminals of the unit 60 from the front side of the transformer. This reduced the risk of electric shock or short circuits caused by contact with other objects. On the other hand, in accordance with the above-mentioned case of the unit, the lower part of the side edge of the unit placement part, which has a smaller width from front to back compared to the front side (left and right width of the front end of the unit placement part), is an open non-blind part. The voltage side terminal and 0 volt side terminal of the unit can be easily seen from the side of the transformer, making it easy to check the wiring connections.
In addition, by providing the above-mentioned non-blinding part, when manufacturing a transformer, it is possible to insert a finger or a soldering iron not only from the bottom to the top of the unit arrangement part, but also from the side of the unit arrangement part. It can be inserted toward the bolt side terminals, making it easy to connect both terminals of the unit to the secondary side terminals of a circuit protector or transformer.

In the present invention according to claim 7, a more specific means for fixing the circuit protector to the housing can be provided. Further, in the present invention according to claim 7, a light emitting diode indicating the energized state is provided on the primary side of the transformer, thereby suppressing the complexity of the circuit configuration on the secondary side of the transformer. That is, from the circuit configuration of the terminal block of the secondary side terminal, the above unit, and the circuit protector, the energizing lamp is removed, and the secondary side of the transformer is connected to the terminal block of the secondary side terminal, the above unit, and the circuit protector. I was able to easily configure the secondary side circuit.

(A) is a partially cutaway plan view of a transformer according to an embodiment of the present invention, and (B) is a front view of the transformer of (A). 2 is a partially cutaway right side view of the transformer shown in FIG. 1. FIG. (A) is a perspective view mainly showing the upper part of the electrical outlet shown in Figure 1 (photo explanatory view), (B) is a partially cutaway perspective view (photo) of the transformer shown in (A) looking up from the lower front. explanatory diagram). FIG. 2 is an explanatory diagram of the transformer circuit shown in FIG. 1; (A) is a perspective view (photo explanatory diagram) of the transformer guide in Figure 1 and the terminal block before it is attached to the guide, (B) is a perspective view (photo) mainly showing the bottom side of the terminal block in (A). (illustrative diagram). (A) is a perspective view (illustrative diagram using a photograph) showing the upper surface side of the casing of the transformer in FIG. 1 and the circuit protector with the casing removed. A plan view, and (B) an exploded plan view (photographic explanatory diagram) showing the assembled state of the transformer in (A). (A) is a perspective view mainly showing the top side of the unit (of the wiring plug connector and earth leakage breaker) of the transformer in FIG. 1, and (B) is a perspective view mainly showing the bottom side of the unit in (A). FIG. 8 is a perspective view (photographic explanatory diagram) showing a state in which the terminal block, the circuit breaker, and the guide for holding the unit in FIG. 7 have been removed from the transformer in FIG. 1; FIG. 7 is a partially cutaway plan view showing a modification of the transformer. 10 is a front view of the transformer shown in FIG. 9. FIG. 10 is a partially cutaway right side view of the transformer shown in FIG. 9. FIG.

Hereinafter, a transformer 1 according to an embodiment of the present invention will be described based on the drawings. The front of the transformer 1 is shown as L, the rear as B, the upper part as U, the lower part as S, the left side as L, and the right side as R.

(Basic configuration)
This transformer 1 transforms electricity input from the primary side and outputs it to the secondary side, and includes a bundle 20 of iron cores 2, coils 3a and 3b on the primary and secondary sides, and a binding member 4. , a primary terminal 3m for inputting electricity on the primary side, a secondary terminal 3n for outputting electricity transformed on the secondary side, and terminal blocks 5a and 5b for the primary and secondary sides, respectively. , a wiring plug-in connector 6 provided on the secondary side separately from the secondary side terminal 3n, a breaker k1 provided on the secondary side, and a circuit protector k2 (see FIGS. 1 to 3). 4). In this example, transformer 1 is a single-phase transformer.
The configuration of each part of the transformer 1 will be explained in order below.

(Primary side terminal 3m and secondary side terminal 3n)
The transformer 1 includes at least one input terminal 31a, which inputs electricity from a power source, as the primary terminal 3m, and a 0V (zero volt) voltage terminal 30a on the primary side. In this example, the input terminal 31a is an input terminal for a current of 200V voltage, and in addition to the input terminal 31a, an input terminal 32a for a current of 220V voltage and a ground terminal (earth terminal) 52 are connected as the primary side terminal 3m. Be prepared.

The transformer 1 includes, as the secondary terminal 3n, at least one output terminal 31b that outputs a current of a target voltage, and a secondary-side 0V (zero volt) voltage terminal 30b. In this example, the output terminal 31b is a 100V output terminal 31b, and a 110V output terminal 32b is provided as the secondary side terminal 3n in addition to the output terminal 31b. The 0V voltage terminal 30b on the secondary side is grounded. The grounding wire (earth wire) for installing the 0V voltage terminal 30b on the secondary side electrically connects the 0V voltage terminal 30b on the secondary side to either the iron core or a metal holding plate described later. good.
Hereinafter, the 0V voltage terminal 30a will be simply referred to as a 0V terminal (0 volt terminal) 30a, and the 0V voltage terminal 30b will simply be referred to as a 0V terminal (0 volt terminal) 30b, as needed.

Each of the primary side terminals 3m is provided on the primary side terminal block 5a made of resin with insulation properties, and each of the secondary side terminals 3n is provided on the secondary side of the resin made with insulation properties. is provided to the terminal block 5b. Both terminal blocks 5a and 5b will be explained in detail later.

(Wiring plug connector 6 and breaker k1)
The breaker k1 interrupts the circuit on the secondary side when an overcurrent flows therein.
Specifically, an earth leakage breaker (hereinafter referred to as earth leakage breaker k1) is employed as the breaker k1.
The earth leakage breaker k1 prevents electric shock by interrupting the secondary side circuit when detecting earth leakage.
In this example, the wiring plug connector 6 and the earth leakage breaker k1 are housed in one case 61 (outlet case) and constitute one unit 60 (outlet unit) (Figs. 1 to 4, 7 and Figure 8). In other words, the wiring plug connector 6 can be equipped with the earth leakage breaker k1, and specifically, the wiring plug connector 6 can have the earth leakage breaker k1 inside the case 61. can be adopted. The case 61 is made of resin and has an insulating property and has a substantially rectangular parallelepiped shape.
The front and rear widths of the case 61 are smaller than the left and right widths of the case 61 with reference to the front and rear directions F and B (the overlapping direction of the iron cores 2 described later) of the transformer 1 to which the case 61 is attached.

As for the unit 60 (the wiring plug-in connector 6 equipped with the earth leakage breaker k1), a commercially available unit can be used.
More specifically, the wiring plug-in connector 6, which is a two-prong outlet, includes two conductive electrodes, one on the voltage side and one on the 0V (volt) side. The case 61 has an insertion port 62 on the top surface that communicates with each of the conductive electrodes described above. By inserting a plug of an electrical device (not shown) into the outlet 62, a transformed current can be supplied to the electrical device.
The unit 60 connects voltage-side and 0V-side blades 65 of the unit 60 itself, which are electrically connected to the conductive electrode, separate from the plug (blades) of the electrical equipment, to voltage-side terminals, respectively. 65b and 0V side terminal 65a.
The 0V side terminal 65a is a terminal connected to the 0V voltage terminal 30b on the secondary side.
The blades 65 constituting the voltage side terminal 65b and the 0V side terminal 65a protrude downward from the bottom surface of the unit 60 (FIGS. 2, 3B, and 7).
In this example, the wiring plug-in connector 6 is a two-core outlet, but the wiring plug-in connector 6 may be a three-core outlet.

Furthermore, the bottom surface of the unit 60 is provided with at least one protrusion 66 that protrudes downward at a distance from the blade 65. In this example, protrusions 66 are provided at two locations farther apart from the blade 65 in the left-right direction (to the right R).
In this example, an outlet other than the outlet 62 is provided on the side surface (right side) of the case 61 as a sub-insertion port 64 (FIG. 2). However, the unit 60 may be provided with only one of the insertion port 62 and the auxiliary insertion port 64 as an insertion port.
The unit 60 includes a test button 63 for the earth leakage breaker k1 (FIGS. 1, 2, 3(A), 7(A), and 8). By pressing the normal test button 63, it is possible to check in advance whether the earth leakage breaker k1 operates in the event of an earth leakage. In this example, the test button 63 also serves as a reset switch, and when the test button 63 is pressed, the activated earth leakage breaker k1 is restored, that is, the circuit on the secondary side of the cut-off transformer 1 is restored to a state where electricity can be supplied. can do.

(Circuit protector k2)
The circuit protector k2 is electrically connected between the above output terminal (100V output terminal 31b) and the voltage side (voltage side terminal 65b) of the wiring plug connector 6 (see FIG. 3(B) and FIG. 4).
The earth leakage breaker k1 is configured to prevent the current flowing between the circuit protector k2 and the voltage side of the wiring plug connector 6, and the voltage between the grounded 0V terminal 30b on the secondary side and the wiring plug connector 6. By detecting the difference between the current flowing between the 0V (0 volt) side and the current flowing between the transformer 1 and the 0V (0 volt) side, the energization of the secondary side circuit of the transformer 1 is interrupted.
The circuit protector k2 includes two blades as connection terminals k20 (FIGS. 3(B) and 6(B)).
Among the connection terminals k20 of the circuit protector k2, the input side connection terminal k20a is a terminal connected to the output terminal of the transformer 1 (in this example, the 100V output terminal 31b).
Among the connection terminals k20 of the circuit protector k2, the output side connection terminal k20b is a terminal connected to the voltage side terminal 65b of the unit 60.

A commercially available one can be used as the circuit protector k2.
Specifically, the illustrated commercially available circuit protector k2 is a circuit included in a block having a substantially rectangular parallelepiped shape.
The connection terminal k20 projects downward from the bottom of the block of the circuit protector k2.
The circuit protector k2 is separate from the circuit protector k2 and is fixed in an electrically insulating resin casing 7.

The circuit protector k2 includes a protruding shaft k21 that protrudes upward from the upper surface of the block and has a male thread on the outer peripheral surface.
Further, the circuit protector k2 includes an annular fixing member k22 formed separately from the block that is the main body of the circuit protector k2. The inner peripheral surface of the annular fixing member k22 is provided with a female thread that can be screwed into the male thread of the protruding shaft k21.
The bottom of the housing 7 is an open part (open part 70) that exposes the two connection terminals k20 of the circuit protector k2. Specifically, the casing 7 is a substantially rectangular parallelepiped, has no bottom, and has an open portion 70 at the bottom.

The housing 7 includes an insertion portion 71 having an L-shaped cross section between the left and right side surfaces of the housing 7 . The insertion portion 71 may be a penetration portion passing through the housing 7 from side to side, but in this example, the insertion portion 71 is formed in the housing 7 as a notch portion leading to the back side of the housing 7 .
Furthermore, the casing 7 includes a hole 72 extending vertically through the casing 7 on the top surface. The inner diameter of the hole 72 is larger than the outer diameter of the protruding shaft k of the circuit protector k2, and on the other hand, the block, which is the main body of the circuit protector k2, has a size (dimension) that does not allow it to pass through the hole 72. Furthermore, the inner diameter of the hole 72 is smaller than the outer diameter of the fixing member k22.

When manufacturing the transformer 1, the circuit protector k2 is inserted through the open part 70 of the housing 7, the protruding shaft k21 is made to protrude from the upper surface of the housing 7 through the hole 72, and the female screw of the fixing member k22 is tightened on the outside of the housing 7. By screwing into the male thread of the protruding shaft k21, the circuit protector k2 can be fixed to the upper surface (top) of the housing 7. In this example, the fixing member k22 is a ring having anti-slip features such as knurling and a plurality of other longitudinal stripes formed on the outer peripheral surface. In addition to the ring, a nut can be used as the fixing member k22.

(Iron core 2 and coils 3a, 3b)
For the iron core 2, a well-known member through which an induced current flows is employed. That is, the iron core 2 is a plate-shaped body made of iron, and a plurality of iron cores 2 are stacked on top of each other to form the bundle 20. The coils 3a and 3b on the primary and secondary sides of the transformer 1 are wound around the bundle 20 of the iron core 2 (FIG. 4). A bundle 20 of iron cores 2 is fastened with the binding member 4 so that the stacked iron cores 2 are not separated from each other (FIGS. 1, 3, and 8).
The bundle 20 of the iron cores 2 is provided with a through hole 21 that penetrates the bundle 20 along the stacking direction of the plurality of iron cores 2 (FIGS. 1(A) and 2). For convenience of explanation, the overlapping direction of the iron core 2 is referred to as the front-rear direction F, B of the transformer 1, and the lateral direction orthogonal to the overlapping direction is referred to as the left-right direction L, R of the transformer 1.

In this example, the through holes 21 are provided at four locations in the bundle 20 of the iron cores 2, and two of the through holes 21 are provided higher than the other two through holes 21. Here, the two upper through holes 21 are referred to as upper through holes 21, and the other two through holes 21 are referred to as lower through holes 21.
The upper through holes 21 are spaced apart from each other in the lateral direction, that is, in the left and right directions L and R. The lower through holes 21 are also spaced apart from each other in the lateral direction, that is, in the left and right directions L and R.
When the primary coil 3a is connected to a power source (not shown) and a current flows to the primary coil 3a, an induced current is generated in the bundle 20 of the iron core 2 by electromagnetic induction, and the secondary coil 3b is A current transformed to the desired voltage is generated.

The primary side coil 3a is provided with the above-mentioned primary side terminal 3m, that is, the input terminal, which is connected to the power source, and the secondary side coil 3b is provided with the above-mentioned primary side terminal 3m, that is, the input terminal, which is connected to the equipment receiving electricity of the target voltage. A secondary side terminal 3n, that is, an output terminal is provided (FIG. 4).
The primary side coil 3a has the above-mentioned 200V voltage current input terminal 31a, 220V voltage current input terminal 32a, and primary side 0V voltage terminal 30a as the primary side terminals 3m, respectively. It is connected to the position of the number of turns corresponding to the voltage, and can receive electricity by selecting from either of the above-mentioned 200V and 220V power sources.

As mentioned above, the secondary side coil 3b has a 100V voltage current output terminal 31b, a 110V voltage current output terminal 32b, and a secondary side 0V voltage terminal 30b as the secondary side terminals 3n. , are connected to the positions of the coils 3b whose number of turns corresponds to the respective voltages.
In this example, a light emitting diode k3 is electrically connected as a current-carrying lamp to the primary side of the transformer 1, that is, between the 200V current input terminal 31a and the 220V current input terminal 32a. It can be recognized that the transformer 1 is energized by lighting the light emitting diode k3.
The light emitting diode k3 is provided on the terminal block 5a on the primary side of the transformer 1.
In this example, a power-saving blue light emitting diode is provided as the light emitting diode k3 for energization display. However, a light emitting diode other than blue may be used as the light emitting diode k3.
Note that in FIG. 4, necessary resistors and commutators are omitted.

If there is no need to select the power source to be connected, only the input terminal corresponding to the power source among the input terminals 31a and 32a is provided to the primary coil 3a, and the other input terminals can be omitted. For example, only the 0V voltage terminal 30a and the 200V voltage input terminal 31a are provided, and the 220V voltage input terminal 32a can be omitted. In contrast to the above, it is also possible to leave the 220V voltage input terminal 32a and omit the 200V voltage input terminal 31a. The 200V voltage input terminal 31a is used as the first input terminal, the 220V voltage input terminal 32a is used as the second input terminal, and a third input terminal for another voltage is provided to the primary coil 3a. can.

Furthermore, if there is no need to select the desired voltage on the secondary side, only the desired output terminal among the output terminals 31b and 32b shall be provided to the secondary side coil 3b, and other input terminals may be omitted. I can do it. For example, only the 0V voltage terminal 30b and the 100V voltage output terminal 31b are provided, and the 110V voltage output terminal 32b can be omitted. Contrary to the above, it is also possible to leave the 110V voltage output terminal 32b and omit the 100V voltage output terminal 31b. The 100V voltage output terminal 31b is used as the first output terminal, the 110V voltage output terminal 32b is used as the second output terminal, and the third output terminal that outputs the current of another voltage is connected to the secondary coil 3b. It can also be implemented as a set-up.
The values of the voltages on the input side and output side are shown based on a general commercial power source, and do not exclude setting the voltage to values other than the above depending on the power source.

(Binding member 4)
The binding member 4 binds the plurality of iron cores 2 stacked together to form a bundle 20 so as not to separate them (FIGS. 1 to 3, 5, and 8).
About the bundle of iron cores 2 in which the coils 3a and 3b are wound and fastened by the binding member 4, almost the entire part where the coils 3a and 3b are not wound is exposed, and the heat generated by the voltage transformation is transferred to the outside air. can be emitted directly to
Specifically, the binding member 4 includes two left and right upper fastening members 40a, two left and right lower fastening members 40b, and four pressing plates. Each of the presser plates is a metal plate whose length is in the left-right and lateral directions.
Two of the above-mentioned holding plates are arranged as front holding plates 47m and 48m at two places above and below the front side of the bundle 20 of iron cores 2, and the other two of the above holding plates are used as rear holding plates 47n and 48n, which hold the cores 2 together. They are arranged at two locations, upper and lower, on the back side of the bundle 20.

Hereinafter, among the front holding plates 47m and 48m, the front holding plate 47m arranged at the upper part of the front surface of the bundle 20 will be referred to as a guide 47m (front guide 47m) as necessary. The front holding plate 48m, which is arranged at the lower part of the front surface of the guide 47m, is called a base 48m (front base 48m) if necessary. The front holding plate 47m, which serves as the front guide 47m, corresponds to the "guide" described in claim 4.
Also, among the rear press plates 47n and 48n, the rear press plate 47n arranged at the upper part of the rear surface (rear surface) of the bundle 20 is called a guide 47n (rear guide 47n) as needed. The rear holding plate 48n disposed at the lower part of the rear surface of the bundle 20, that is, disposed below the guide 47n, is called a base 48n (rear base 48n) if necessary.

Each of the fastening members 40, that is, the upper fastening member 40a and the lower fastening member 40b, consists of a male screw member 41 and a female screw member 42 formed separately from the male screw member 41 (see FIG. 1(A). ) and Figure 2). The male screw member 41 includes a shaft portion 43 in which a male screw is formed, and a seat portion 44 provided at one end of the shaft portion 43. The seat portion 44 is formed integrally with the shaft portion 43 and includes a seat surface. The male screw member 41 and the female screw member 42 are metal members. For the male screw member 41, a well-known screw or bolt having a head as the seat portion 44 can be employed. The female screw member 42 includes a cylindrical portion 45 in which a female thread is formed and a seat portion (hereinafter referred to as a sub-seat portion 46) provided at one end of the cylindrical portion. The sub-seat surface portion 46 is formed integrally with the cylindrical portion 45 and includes a seat surface. The secondary seat surface portion 46 is a large diameter portion having an outer diameter larger than the outer diameter of the cylindrical portion 45 . In addition, a well-known member such as a nut that does not include the cylindrical portion 45 may be used as the female screw member 42.

Pass the cylindrical portion 45 of the female screw member 42 through the through hole 21 of the bundle 20 of iron cores 2, and pass the shaft portion 43 of the male screw member 41 from the opposite side of the through hole 21 into the through hole 21 of the bundle 20 of iron cores 2. The male screw member 41 and the female screw member 42 are connected by screwing the male screw of the shaft portion 43 into the female screw of the cylindrical portion 45 through the thread, and the seat portion 44 of the male screw member 41 and the female screw member 42 are connected. A bundle 20 of iron cores 2 is sandwiched between the secondary seat surface portion 46 of

Each of the front base 48m and the rear base 48n is a bent plate-shaped body having a substantially L-shaped cross section (FIGS. 1, 2, and 8). Two through holes 48b are provided in each of the bases 48m, 48n at a distance from each other in the longitudinal direction (horizontal direction) of the bases 48m, 48n. The distance between both through holes 48b is equal to the distance between both lower through holes 21 of bundle 20 of iron cores 2.
By passing the fastening member 40b through both the through holes 48b of the front base 48m and the rear base 48n together with the lower through hole 21 of the bundle 20 of the iron cores 2, the front base 48m and the rear base 48n each It is fixed to the front side and the rear side of the bundle 20. As described above, the bases 48m and 48n attached to the bundle 20 of the iron cores 2 are jigs for receiving screws, bolts, etc. for fixing the transformer 1 to others.

Each of the front guide 47m and the rear guide 47n is also provided with two through holes 47b spaced apart from each other in their own (left and right) longitudinal directions. The distance between the through holes 47b is equal to the distance between the upper through holes 21 of the bundle 20 of the iron cores 2.
By passing the fastening member 40 through the upper through hole 21 of the bundle 20 of the iron cores 2 and through the through holes 47b of the front guide 47m and the rear guide 47n, each of the front guide 47m and the rear guide 47n It is fixed to the front side and the rear side of the bundle 20.
Each of the guides 47, the front guide 47m and the rear guide 47n, extending from side to side, has an angular section with a substantially L-shaped cross section with the lower side bent forward as a locking section 47a between the two through holes 47b (Fig. 5(A)(B)). In FIG. 1A, the entire locking section 47a is hidden behind the terminal blocks 5a and 5b and cannot be seen; however, in FIG. 1A, the reference numeral 47a indicates the left end (position) of the locking section 47a.

The front guide 47m includes a unit placement portion 47c adjacent to the locking section 47a in the (left and right) longitudinal direction. In this example, the rear guide 47n does not include the unit placement portion 47c.
The unit placement portion 47c is a shelf-shaped portion that is provided next to one side in the left-right direction of the locking section 47a of the front guide 47m and projects forward from the front guide 47m. The unit placement portion 47c projects further forward than the locking section 47a. The front-to-back width of the unit placement portion 47c is approximately the same as the front-to-back width of the case 61 of the unit 60. Further, the left and right widths of the unit arrangement portion 47c are approximately the same as the left and right widths of the case 61. That is, the front and rear widths of the unit placement portion 47c are smaller than the left and right widths of the unit placement portion 47c. In this example, the unit placement portion 47c projects forward from the upper side of the front guide 47m.

The upper surface of the unit placement portion 47c constitutes a placement surface on which the unit 60 (case 61) is placed.
The placement surface of the unit placement portion 47c includes a wire connection opening 47d and a positioning portion 47e. The wiring opening 47d is an opening that vertically passes through the unit placement portion 47c. The alignment portion 47e is a penetrating portion that vertically passes through the unit placement portion 47c. In this example, the positioning portions 47e are provided at two locations apart from the wire connection opening 47d in the left-right direction (rightward R in this example).

When placing the unit 60 on the placement surface of the unit placement portion 47c, fit the protrusion 66 of the unit 60 into the alignment portion 47e, and pass the voltage side and 0V side blades 65 of the unit 60 through the connection opening 47d. This allows the unit 60 to be positioned with respect to the unit placement portion 47c. That is, the unit 60, which is substantially rectangular in plan view, can be placed on the placement surface of the unit placement portion 47c so as to protrude from the unit placement portion 47c, which is also substantially rectangular in plan view. Furthermore, the positioning portion 47e may be a recess (recess) that receives the protrusion 66 of the unit 60 instead of the above-mentioned penetrating portion.
Each blade 65 on the voltage side and 0 volt side of the unit 60 protrudes downward from the unit placement portion 47c through the wiring opening 47d.

Further, the front end of the unit placement portion 47c includes a blind portion 47f extending downward at least in front of the wire connection opening 47d. The blind portion 47f hides the voltage side terminal and the 0 volt side terminal of the unit 60 when the transformer 1 is viewed from the front. Further, the left and right ends of the unit placement portion 47c are not provided with the above-mentioned blind portion 47f and are open from below. That is, below the left and right ends of the unit placement portion 47c are non-blinding portions 47g that allow the voltage side terminal and the 0 volt side terminal of the unit 60 to be visually recognized when at least one of the left and right transformers 1 is viewed from the side.

(terminal blocks 5a, 5b)
As described above, the 0V voltage terminal 30a, the 200V input terminal 31a, and the 220V input terminal 32a are provided to the primary side terminal block 5a, and the 0V voltage terminal 30b and the 100V input terminal 32a are provided to the secondary side terminal block 5b. A voltage output terminal 31b and a 110V voltage output terminal 32b are provided.
The terminal blocks 5a and 5b on the primary side and the secondary side are formed separately from the bundle 20 of the iron cores 2, respectively. The terminal blocks 5a and 5b on the primary side and the secondary side are respectively cases made of an insulating member such as plastic. The terminal blocks 5a and 5b are small cases with a width smaller than the distance between the through holes 47b of the guide 47, and can be placed between the through holes 47b of the guides 47m and 47n (FIG. 1(B)). ).

Each of the primary side and secondary side terminal blocks 5a and 5b may be formed by combining a plurality of structural members that can be separated for each provided terminal as in this example, or may be formed as an integral body that cannot be separated. Also good. However, by making it possible to separate and connect the terminal block in units of provided terminals, it is possible to more flexibly respond to changes in the number of terminals during manufacturing by increasing or decreasing the number of constituent members. Particularly when reducing the number of terminals, unnecessary space can be eliminated by removing the above-mentioned components. As the terminal block, for example, a transformer terminal block disclosed in Japanese Patent Application Laid-Open No. 2014-232612 can be adopted. However, it is also possible to use a terminal block other than the terminal block shown in the publication. It is also possible to use a terminal block that cannot be separated into individual terminals.

Each of the primary and secondary terminal blocks 5a and 5b includes an insertion portion 51 having a substantially L-shaped cross section through which the angled locking section 47a of the front guide 47m can pass. In this example, the insertion portion 51 is a penetrating portion that penetrates the terminal blocks 5a and 5b in the lateral direction, that is, in the left and right directions L and R.
However, the insertion portion 51 is not limited to being formed as a penetrating portion. For example, the insertion portion 51 may be formed by forming a notch such as a groove on the bottom surface of each terminal block 5a, 5b.

When manufacturing the transformer 1, before fixing the front holding plate 47m, which is a guide, to the bundle 20 of the core 2 with the upper fastening member 40a, the locking section 47a of the front holding plate 47m is inserted into the insertion portion 71 of the casing 7. At the same time, the housing 7 and the terminal block 5b are attached to the front holding plate 47m through the locking section 47a of the front holding plate 47m through the insertion portion 51 of the terminal block 5b (FIG. 2(B), FIG. 3(A)(B) )). In this example, since the insertion part 71 of the housing 7 is a notch, unlike the insertion part 51 of the terminal block 5b, it is necessary to pass the front holding plate 47m from the left and right ends (the left end in the illustrated example). Instead, for example, it is also possible to first pass the terminal block 5b through the front holding plate 47m, and then lock the insertion portion 71 from above to the locking section 47a of the front holding plate 47m. By connecting the wires, the housing 7 is fixed to the locking section 47a of the front holding plate 47m. However, the insertion portion 71 of the housing 7 may be implemented as a penetrating portion that penetrates the housing 7 from side to side, similar to the insertion portion 51 of the terminal block 5b.

By attaching to the locking section 47a, the housing 7 is placed between the terminal block 5b on the secondary side and the unit 60 in the front guide 47m, and as described above, the circuit protector k2 is inserted from the opening 70 of the housing 7. The connection terminals k20a and k20b are exposed, respectively. Then, when the unit 60 is placed on the placement surface of the unit placement part 47c, the voltage side and 0V side blades 65 (0V side terminal 65a and voltage side terminal 65b) of the unit 60 are inserted from the wiring opening 47d into the unit placement part 47c. It protrudes below 47c. The output terminal on the terminal block 5b on the secondary side of the transformer 1 and the connection terminal k20a on the input side of the circuit protector k2 are connected by soldering with a first conductive wire d1 covered with an insulating material, and the circuit protector The connection terminal on the output side of k2 and the voltage side terminal of the unit 60 are connected by soldering a second conducting wire d2 coated with an insulating material, and the 0 volt terminal on the secondary side and the voltage side terminal of the unit 60 are The 0-volt side terminal of the unit 60 is connected to the third conductive wire d3 covered with an insulating material by soldering (FIG. 1(B), FIG. 2, and FIG. 3).

(Example of change)
In the above embodiment, the plate-shaped supports formed separately from the presser plates 47m and 47n, that is, the support plates (front support plate 47s and rear support plate 47t) are replaced with the presser plates 47m and 47n, and the guides (guide 47s , 47t) (FIGS. 9 to 11), both support plates (guides) 47s and 47t are provided with a locking section 47a in the transformer 1 shown in FIGS. 1 to 8, and the front support plate 47s is provided with a unit placement portion 47c. You can also use it as
That is, instead of supporting the terminal blocks 5a, 5b, the housing 7 of the circuit protector k2, and the unit 60 directly on the holding plates 47m, 47n, they are indirectly supported directly on the holding plates 47m, 47n via the supporting plates 47s, 47t. The terminal block 5, the housing 7 of the circuit protector k2, and further the unit 60 may be supported.

In the modified examples shown in FIGS. 9 to 11, differences from the guide of the transformer 1 shown in FIGS. 1 to 8 will be mainly explained. The presser plates 47m, 47n are provided with fastening holes 47p that penetrate the presser plates 47m, 47n back and forth in two places on the left and right between the left and right through holes 47b in the left and right longitudinal directions. Each of the support plates 47s and 47t includes an insertion hole 47bb that penetrates the support plates 47s and 47t back and forth to a position (at both ends of the support plates 47s and 47t) corresponding to the retaining hole 47p in the left and right longitudinal direction.
By passing the fasteners 49 such as screws through the insertion holes 47b and the fastening holes 47p of the holding plates 47m and 47n, the supporting plates 47s and 47t can be attached to the holding plates arranged on the front and rear sides of the bundle of iron cores. It is fixed to each of the plates 47m and 47n. The fasteners 49 may be well-known bolts, nuts, screws, rivets, or the like. In this example, the fastener 49 is a combination of a bolt and a nut, and the head of the bolt is sandwiched between the support plates 47s and 47t and the bundle 20 of the iron core 2, and the shaft of the bolt is inserted into the fastening hole 47p. It passes through and protrudes from the holding plates 47m and 47n. A nut is screwed into the protruding portion of the shaft portion of the fastener 49, and support plates 47s and 47t are fixed to the holding plates 47m and 47n as guides in place of the holding plates 47m and 47n, respectively. In the modified examples of FIGS. 9 to 11, matters not specifically mentioned are the same as those of the transformer 1 shown in FIGS. 1 to 8.

(Summary)
The transformer 1 according to the present invention is equipped with an earth leakage breaker k1 on the primary side of the transformer 1 to protect the transformer 1 main body and the secondary side load device (electrical equipment connected to the wiring plug connector 6). .
In other words, by equipping the secondary side outlet (wiring plug connector 6) of the transformer 1 with an earth leakage breaker k1, when an abnormal current flows in an electrical device that is a secondary side load device, the power Supply can be stopped automatically. Furthermore, a circuit protector k2 is also provided on the secondary side of the transformer 1 along with the above-mentioned outlet, so that even if an abnormal overcurrent occurs, the power supply can be stopped.
The earth leakage breaker k1 can be easily restored by pressing the breaker switch (test button 63). Further, a light emitting diode (LED energizing lamp) k3 is provided on the primary side of the transformer 1, and the energizing state can be displayed.

1 Transformer 2 Iron core 3a (Primary side) coil 3b (Secondary side) coil 3m Primary side terminal 3n Secondary side terminal 4 Binding member 5a Primary side terminal block 5b Secondary side terminal block 6 Plug-in connection for wiring vessel (outlet)
7 Housing 21 Through hole 30a (Primary side) 0V voltage terminal 31a (200V voltage) Input terminal 32a (220V voltage) Input terminal 30b (Secondary side) 0V voltage terminal 31b (100V voltage) Output terminal 32b Output terminal (of 110V voltage) 40 Fastening member 40a Upper fastening member 40b Lower fastening member 41 Male screw member (of fastening member 40) 42 Female screw member (of fastening member 40) 43 Shaft portion (of male screw member 41) 44 ( Seat part 45 (of male thread member 41) Cylindrical part 46 (of female thread member 42) Sub seat part 47a (of female thread member 42) Locking section 47b (of guide 47m) Through hole 47bb (of guides 47s, 47t) Insertion hole 47c (for guides 47s and 47t, which are supports) Unit placement part 47d Connection opening 47e Positioning part 47f Blind part 47g Non-blind part 47m (Upper) Front holding plate (front guide)
47n (Upper) Rear holding plate (rear guide)
47p (upper front holding plate 47m and rear holding plate 47n each) Fastening hole
47s Support plate (front support plate)
47t Support plate (rear support plate)
48b (base 48m, 48n) through hole
48m (lower) front holding plate (front base)
48n (lower) rear holding plate (rear base)
49 Fastener 51 Insertion part (of terminal blocks 5a, 5b) 52 Ground terminal (earth terminal)
60 (outlet) unit 61 (unit 60) case 62 (case 61) socket 63 (breaker k1) test button 64 (case 61) sub socket 65 (unit 60) blade 65a (blade 65) )0V side terminal 65a
65b (of blade 65) Voltage side terminal 65b
66 Projection part (of case 61) 70 Opening part (of case 7) 71 Insertion part (of case 7) 72 Hole (of case 7) d1 First conducting wire d2 Second conducting wire d3 Third conducting wire d4 Fourth conductor k1 Earth leakage breaker k2 Circuit protector k3 Light emitting diode (LED energizing lamp)
k20 (of circuit protector k2) connection terminal k20a (of connection terminal k20) input side connection terminal k20b (of connection terminal k20) output side connection terminal k21 (of circuit protector k2) protruding shaft k22 (of circuit protector k2) )Fixing member

Claims (7)

A transformer includes a plurality of stacked iron cores, primary and secondary coils wound around the bundle of stacked iron cores, and transforms electricity input from the primary side and outputs it to the secondary side. ,
The transformer includes at least one output terminal that outputs electricity at a target voltage and a 0 volt terminal as a secondary terminal of the transformer,
Separately from the secondary side terminal, a wiring plug-in connector capable of connecting a plug of an electrical device to the secondary side of the transformer is provided,
A transformer, wherein the wiring plug connector is provided to a secondary side of the transformer via a breaker. The breaker is an earth leakage breaker,
2. The transformer according to claim 1, further comprising a circuit protector provided on the secondary side of the transformer to protect the electrical equipment connected to the wiring plug connector. A single-phase transformer,
The 0 volt terminal is directly or indirectly grounded to the iron core,
the circuit protector is electrically interposed between the output terminal and the voltage side of the wiring plug connector;
The earth leakage breaker allows a current to flow between the circuit protector and the voltage side of the wiring plug connector, and a current flowing between the grounded 0 volt terminal and the 0 volt side of the wiring plug connector. It detects the difference in current and cuts off the secondary circuit of the transformer,
comprising a binding member that binds the plurality of stacked iron cores;
At least the secondary side terminal, the wiring plug-in connector, the earth leakage breaker, and the circuit protector are directly or indirectly attached to the binding member, and the binding member connects at least the secondary side terminal and the wiring. 3. The transformer according to claim 2, wherein the transformer supports a plug-in connector, the earth leakage breaker, and the circuit protector. At least the secondary terminal is housed in a resin secondary terminal block,
The wiring plug connector is a two-prong outlet with two conductive electrodes on the voltage side and the 0 volt side, and the wiring plug connector connects the blade of the plug of the electrical device. comprising an insertion port that is inserted toward the conductive electrode,
The wiring plug-in connector and the earth leakage breaker are provided in one substantially rectangular parallelepiped case to form one unit, and the front and rear widths of the case are smaller than the left and right widths of the case. and the insertion port is provided to the case,
Furthermore, the unit includes voltage side and 0 volt side blades of the unit itself, which are electrically connected to the conductive electrode and are separate from the plug, as voltage side terminals and 0 volt side terminals, respectively,
The circuit protector also includes two blades as connection terminals,
The circuit protector is fixed in a resin housing separate from the circuit protector,
The casing includes an open portion that exposes the two connection terminals of the circuit protector,
The output terminal and an input side connection terminal of the connection terminals of the circuit protector are connected, and an output side connection terminal of the connection terminals of the circuit protector and the voltage side terminal of the unit are connected, The 0 volt terminal and the 0 volt side terminal of the unit are connected,
The binding member includes a shaft portion that passes through the inside of the bundle of iron cores along the stacking direction of the iron cores, and a front side of the bundle of iron cores that is provided on the shaft portion and with the stacking direction of the iron cores as the front-rear direction. and a seat portion disposed on the rear side, and at least two holding plates disposed on the front side and the rear side of the bundle of iron cores,
At least one of the seat parts is formed separately from the shaft part and attached to one end of the shaft part, and sandwiches the bundle of iron cores together with the other seat part via the holding plate,
The holding plate is arranged on the front side or the rear side of the bundle of iron cores by being penetrated by the shaft part and fixed between at least one of the seat parts and the bundle of iron cores. ,
The holding plate disposed at least on the front side of the bundle of iron cores uses itself as a guide, or is provided with a support separate from the holding plate as a guide,
By attaching the terminal block, the unit, and the circuit protector of the secondary side terminal to the guide, the secondary side terminal, the unit, and the circuit protector are arranged on the front side of the bundle of iron cores. It is a thing,
The guide is a plate-shaped body whose longitudinal direction is in the left-right direction of the transformer, and the guide is provided with a locking section that holds the terminal block in a state where the guide penetrates the housing together with the terminal block in the longitudinal direction. The transformer according to 3. The bundle of iron cores has at least two through holes spaced apart from each other in a front view of the transformer, through which the stacked bundle of iron cores can be penetrated and the shaft portion of the binding member can be inserted therethrough. In preparation for
The shaft portion is provided with a male screw, and the seat portion formed separately from the shaft portion is provided with a female screw, and by screwing the female screw into the male screw of the shaft portion, the shaft The seat portion formed separately from the portion can be attached to the shaft portion,
The holding plate is a plate-shaped body extending to the left and right of the transformer,
Each of the holding plates includes at least two through holes provided at each of the longitudinal ends of the holding plate,
The shaft portion of the fastening member is passed through each of the through holes together with the through hole, and the seat surface portion, which is separate from the shaft portion, is screwed to the shaft portion,
The holding plate disposed on the front side of the bundle of iron cores is a plate-like body extending from side to side and having an angular section having a substantially L-shaped cross section as the guide and the locking section,
The holding plate disposed on the front side of the bundle of iron cores includes a shelf-shaped unit arrangement portion protruding forward from the supporting plate next to one of the angled sections in the left-right direction,
The unit placement portion projects forward beyond the angular section, and the front and rear widths of the unit placement portion are approximately equal to the front and rear widths of the case;
The left and right widths of the unit arrangement portion are approximately equal to the left and right widths of the case,
The upper surface of the unit placement portion is a placement surface on which the unit is placed, and the placement surface serves as a connection opening for passing each blade on the voltage side and 0 volt side of the unit. an opening that penetrates vertically; and an alignment section provided at at least one location on the placement surface, and the alignment section is a penetration section that passes through the unit placement section up and down, or The front end of the unit placement portion is a recess provided in a placement surface, and the front end of the unit placement portion includes a blind portion extending downward at least in front of the opening, and the blind portion is configured to cover the front end of the unit when viewed from the front of the transformer. It hides the voltage side terminal and the 0 volt side terminal,
The left and right side ends of the unit placement portion are open at the bottom, and the lower portions are non-blinding portions without the blinding portions, and the non-blinding portions are at least visible in the side view of the left and right transformers of the unit. It is assumed that the voltage side terminal and the 0 volt side terminal are visible,
The unit includes the insertion port for the wiring connector on at least one of the top, side, and front surfaces of the case, and the voltage side terminal and the 0-volt side terminal on the bottom of the case. , the case further includes at least one protrusion that protrudes downward to the bottom;
When the case is placed on the placement surface of the unit placement section, the protrusion fits into the alignment section, and the opening extends downward from the unit placement section to the voltage side terminal and the zero Expose the bolt side terminal,
At least the terminal block on the secondary side includes an insertion portion having a substantially L-shaped cross section through which the angular section of the holding plate disposed on the front side of the bundle of iron cores can pass,
Both the case and the circuit protector are provided with a separate housing, the circuit protector is fixed into the housing, and the housing is configured to hold the support plate disposed on the front side of the bundle of iron cores. Equipped with an insertion part having an L-shaped cross section through which the angular section can pass,
By inserting the angled section of the holding plate arranged on the front side of the bundle of iron cores into the insertion portion, the housing is attached to the holding plate arranged on the front side of the bundle of iron cores. is,
By inserting the angled section of the holding plate arranged on the front side of the bundle of iron cores into the insertion portion of the terminal block on the secondary side, the terminal block on the secondary side can be inserted into the insertion portion of the bundle of iron cores. attached to the holding plate arranged on the front side,
In the left-right direction, the casing is disposed between the secondary side terminal block and the unit, the bottom of the casing is opened to expose each of the connection terminals of the circuit protector,
The output terminal and the input side connection terminal of the circuit protector are connected by soldering a first conductive wire covered with an insulating material,
The output side connection terminal of the circuit protector and the voltage side terminal of the unit are connected by soldering a second conducting wire covered with an insulating material,
The 0 volt terminal and the 0 volt side terminal of the unit are connected by soldering a third conductive wire covered with an insulating material,
5. The transformer according to claim 4, wherein the unit is fixed to the unit arrangement portion by at least the connections of the first and second conductive wires. The bundle of iron cores has at least two through holes spaced apart from each other in a front view of the transformer, through which the stacked bundle of iron cores can be penetrated and the shaft portion of the binding member can be inserted therethrough. In preparation for
The shaft portion is provided with a male screw, and the seat portion formed separately from the shaft portion is provided with a female screw, and by screwing the female screw into the male screw of the shaft portion, the shaft The seat portion formed separately from the portion can be attached to the shaft portion,
The holding plate is a plate-shaped body extending to the left and right of the transformer,
Each of the holding plates includes at least two through holes provided at each of the longitudinal ends of the holding plate,
The shaft portion of the fastening member is passed through each of the through holes together with the through hole, and the seat surface portion, which is separate from the shaft portion, is screwed to the shaft portion,
At least two fastening holes are provided at positions different from the through holes on the front surface of the holding plate disposed on the front side of the bundle of iron cores,
Both fastening holes are provided in the holding plate at different positions from the through holes and spaced apart from each other,
On the front surface of the holding plate arranged on the front side of the bundle of iron cores, a support plate extending left and right along the longitudinal direction of the holding plate is arranged as the guide,
The support plate is a plate-shaped body that extends from side to side and includes an angular section having a substantially L-shaped cross section as the locking section;
The support plate includes a shelf-shaped unit arrangement portion protruding forward from the support plate next to one of the angled sections in the left-right direction,
The unit placement portion projects forward beyond the angular section, and the front and rear widths of the unit placement portion are approximately equal to the front and rear widths of the case;
The left and right widths of the unit arrangement portion are approximately equal to the left and right widths of the case,
The upper surface of the unit placement portion is a placement surface on which the unit is placed, and the placement surface serves as a connection opening for passing each blade on the voltage side and 0 volt side of the unit. an opening that penetrates vertically; and an alignment section provided at at least one location on the placement surface, and the alignment section is a penetration section that passes through the unit placement section up and down, or The front end of the unit placement portion is a recess provided in a placement surface, and the front end of the unit placement portion includes a blind portion extending downward at least in front of the opening, and the blind portion is configured to cover the front end of the unit when viewed from the front of the transformer. It hides the voltage side terminal and the 0 volt side terminal,
The left and right side ends of the unit placement portion are open at the bottom, and the lower portions are non-blinding portions without the blinding portions, and the non-blinding portions are at least visible in the side view of the left and right transformers of the unit. It is assumed that the voltage side terminal and the 0 volt side terminal are visible,
The unit includes the insertion port for the wiring connector on at least one of the top, side, and front surfaces of the case, and the voltage side terminal and the 0-volt side terminal on the bottom of the case. , the case further includes at least one protrusion that protrudes downward to the bottom;
When the case is placed on the placement surface of the unit placement section, the protrusion fits into the alignment section, and the opening extends downward from the unit placement section to the voltage side terminal and the zero Expose the bolt side terminal,
At least the terminal block on the secondary side includes an insertion portion having a substantially L-shaped cross section through which the angular section of the support plate can pass,
Both the case and the circuit protector include a separate housing, the circuit protector is fixed within the housing, and the housing has an L through which the angular section of the support plate can pass. It has an insertion part with a letter-shaped cross section,
The housing is attached to the angled section of the support plate by inserting the angled section of the support plate into the insertion site,
The secondary side terminal block is attached to the angled section of the support plate by inserting the angled section of the support plate into the insertion portion of the secondary side terminal block,
In the left-right direction, the casing is disposed between the secondary side terminal block and the unit, the bottom of the casing is opened to expose each of the connection terminals of the circuit protector,
At both ends of the support plate, insertion holes are provided that penetrate the support plate back and forth, respectively,
By passing a fastener such as a screw through the insertion hole and the fastening hole, the support plate is fixed to the front surface of the holding plate disposed on the front side of the bundle of iron cores,
The output terminal and the input side connection terminal of the circuit protector are connected by soldering a first conductive wire covered with an insulating material,
The output side connection terminal of the circuit protector and the voltage side terminal of the unit are connected by soldering a second conducting wire covered with an insulating material,
The 0 volt terminal and the 0 volt side terminal of the unit are connected by soldering a third conductive wire covered with an insulating material,
5. The transformer according to claim 4, wherein the unit is fixed to the unit arrangement portion by at least the connections of the first and second conductive wires. The upper surface of the circuit protector is provided with a protruding shaft that protrudes upward and has a male thread on the outer peripheral surface,
an annular fixing member formed separately from the circuit protector, the inner peripheral surface of the annular fixing member having a female thread that can be screwed into the male thread;
The casing includes a hole on the top surface that passes through the casing vertically,
The hole has an inner diameter that is larger than the diameter of the protruding shaft and smaller than the outer diameter of the fixing member,
The circuit protector housed in the housing causes the protruding shaft to protrude from the upper surface of the housing through the hole, and connects the female thread of the fixing member to the male thread of the protruding shaft outside the housing. The circuit protector is fixed to the housing by screwing,
The rear side of the bundle of iron cores includes at least one input terminal and a 0-volt primary terminal as the primary terminal,
5. The transformer according to claim 4, wherein a light emitting diode is provided on the primary side of the transformer as an energization lamp for indicating the energization state.

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