JPH0514665Y2 - - Google Patents

Description

[Detailed description of the invention] Purpose of the invention [Industrial field of application] The invention is aimed at connecting a printed wiring board and a busbar wiring board that constitute an internal circuit in an electrical junction box used for interconnecting wire harnesses. Regarding structural improvements.

[Conventional technology]

Electrical junction boxes are changing from the conventional branch type, which has a built-in busbar wiring board with branch conductive paths, to the so-called function-embedded type, which combines this with a printed wiring board equipped with various electronic components and control functions. .

A conventional connection structure between such a printed wiring board and a bus bar (wiring board) has a configuration as shown in FIG. 7, as disclosed in, for example, Japanese Unexamined Patent Publication No. 59-148514. That is, 1 is a printed wiring board on which various electronic components 2 are mounted, and a tab-shaped terminal 3 is provided on a side edge 1' to be electrically connected to a circuit (not shown) on the back side.
are arranged side by side. Reference numeral 4 denotes a busbar wiring board on which a plurality of busbars 5 are arranged, and tab-shaped contact portions 6 that are connected to the busbars 5 in an upright manner are aligned on the wiring board 4'. Reference numeral 7 denotes an L-shaped relay terminal, which is formed as a female terminal having receiving portions 8, 8 at both ends into which the terminal 3 and contact portion 6 are inserted.

[Problem that the invention attempts to solve]

In the conventional connection structure, in addition to requiring the relay terminal 7, the terminal 3 must be fixed to the printed wiring board 1 by soldering, and the number of parts is large, and the connection work takes time and costs are high. Become. Also,
There are conductor connection (contact) parts between the contact part 6 of the bus bar 5 and the circuit of the printed wiring board 1, such as the circuit and the terminal 3, the terminal 3 and the receiving part 8, and the receiving part 8 and the contact part 6. In many cases, the contact resistance increases and the connection becomes unreliable.

The present invention focuses on these problems and aims to provide a highly reliable connection structure that does not require any separate parts for connecting a printed wiring board and a bus bar, allows for easy connection work, and provides a highly reliable connection structure.

DESCRIPTION OF THE PREFERRED EMBODIMENTS [Means for solving problems] The present invention will be specifically described below with reference to drawings showing embodiments.

Fig. 1 is an exploded perspective view of the connection structure of the present invention, Fig. 2
3 is an exploded perspective view of an electrical connection box to which the above connection structure is applied, and FIG. 4 is a sectional view taken along the line -- when assembled in FIG. 3.

The connection structure between the printed wiring board and the bus bar of the electrical junction box of the present invention is as shown in FIGS.
A plurality of busbars 13 are arranged in parallel and a printed wiring board 10 is accommodated therein, and tab-shaped contact portions 15, 15' provided on the busbars 13 are protruded into a connector housing 18 formed in the case. 1
In the connection structure between the printed wiring board and the bus bar of the electrical connection box A, which is formed by connecting the circuit 11 of 0 and the desired bus bar 13, one side edge 10a of the printed wiring board 10
The terminal portions 12 of the circuits 11 arranged on the board are arranged in parallel, and a contact piece 14b is provided at the end of at least one side edge of a desired bus bar selected from a plurality of bus bars 13 via a rising base 14a. Elastic clamping arm 1
4, the case (upper case 16) is provided with an opening 19 facing the elastic clamping arm 14, and an insertion frame 20 for the printed wiring board 10, and the printed wiring board 10 is inserted into the insertion frame 20. By insertion, the terminal portion 12 of the circuit 11 is held between the bus bar 13 and the elastic holding arm 14, and the terminal portion 12 and the contact piece 14 are
b are in contact and electrically connected.

In the above configuration, the circuit 11 made of copper foil or the like
It is preferable to apply solder plating 12a on the terminal portion 12 formed integrally with the copper foil so as not to damage the copper foil. In addition, bus bar 13
are arranged vertically, and the contact pieces 14 of the elastic clamping arms 14 are coupled from the side edges in parallel with the bus bar.
b is formed in a tapered shape, and the printed wiring board 1
0 can be inserted easily.

Further, as shown in FIG. 4, the bus bar 13 has tab-shaped contact portions 15 and 15' projecting upward and downward from its side edge as branch conductive paths.

In FIGS. 3 and 4, a plurality of connector housings 18 are provided in upper and lower cases 16 and 17, which constitute the outer shell of electrical connection box A, respectively. Further, the upper case 16 has an opening 19, and a printed wiring board 10 surrounds the opening 19 on three sides.
An insertion frame 20 is provided, and a cover 21 having locking means (not shown) is mounted on the insertion frame 20.

Thus, the plurality of bus bars 13 are arranged vertically and housed in the upper case 16 and the lower case 17,
The elastic clamping arm 14 projects to the rear of the opening 19, and the contact parts 15, 15' as branch conductive paths project to the connector housings 18 of the upper and lower cases 16, 17, respectively, where the connector 22 connects the wire harness. Electrical components such as interconnects or fuses are now connected.

[Effect]

According to the connection structure of the present invention, as is clear from FIGS. 1, 2, and 4, by inserting the printed wiring board 10 into the insertion frame 20, the side edge 1
0a enters and is held between the bus bar 13 and the elastic clamping arm 14, and the terminal portion 12 and the contact piece 14b contact, so that the circuit 11 and the bus bar 13 can be easily connected.
connection is achieved. Since the direction of flexure of the elastic clamping arm 14 is in the same plane as the plate-shaped upright base 14a, a large elastic contact pressure acts on the contact piece 14b and the terminal portion 12, thereby establishing a reliable electrical connection.

As a side effect of arranging the busbars 13 vertically, unlike normal busbars arranged in a plane, the tabs can be used as branch conductive paths without being influenced by the routing (circuit pattern) between the busbars. A desired number of contact portions 15, 15' can be freely provided at desired positions, and these can be easily manufactured by simply punching a conductive plate material.

Therefore, if the connection structure of the present invention is adopted, as is clear from FIGS. 3 and 4, the conventional wiring board (see FIG. 7) used to arrange the bus bar 13 will become unnecessary. Instead, it becomes possible to arrange bus bars having a large number of branch conductive paths (contact parts 15, 15') at high density.

[Other Examples]

1 to 4 show an example of an electrical connection box in which elastic clamping arms 14 are coupled in parallel to a bus bar 13 and the bus bar 13 is arranged vertically.

However, as shown in Figure 5 a and b, bus bar 1
A rising piece 14 on one or both side edges of 3'
a' at a right angle, and attach the elastic clamping arm 14' to the bus bar 1.
It may also be perpendicular to 3'. 6th
The figure shows an electrical connection box A' using such a bus bar 13'.

In this case, since the aforementioned printed wiring board 10 is inserted parallel to the surface of the bus bar 13', there is no fear that the board 10 will be damaged by the edge of the bus bar.
Further, since the bus bar 13' is arranged in a plane as in the conventional case, the connection structure between the bus bar and the printed wiring board can be improved mainly without changing the basic structure of the existing electrical connection box.

Effects of the Invention As explained above, according to the connection structure of the printed wiring board and bus bar of the present invention, by simply inserting the printed wiring board into the insertion frame of the case, the printed wiring board and bus bar can be connected to another component such as a relay terminal. It is possible to connect directly and easily without using a wire, and it is possible to improve the reliability of electrical connection and reduce costs.

Further, by adopting a structure in which busbars are arranged vertically, it is possible to greatly improve the busbar circuit density in the electrical connection box and to simplify the circuit configuration.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing one embodiment of the connection structure of the present invention, Fig. 2 is a sectional view of the same connection state, and Fig. 3 is an exploded perspective view of an electrical junction box adopting the above connection structure. FIG. 4 is a sectional view taken along the line -- when assembled in FIG. FIG. 7 is a perspective view of the adopted electrical connection box, and FIG. 7 is a perspective view showing a conventional connection structure. 10...Printed wiring board, 10a...Side edge, 11...
...Circuit, 12...Terminal section, 13, 13'...Bus bar, 14, 14'...Elastic clamping arm, 14a, 1
4a'...Rising base, 14b...Contact piece.

Claims (1)

[Claim for Utility Model Registration] A case in which a plurality of busbars are arranged side by side and a printed wiring board is housed therein, a tab-shaped contact portion provided on the busbars is protruded into a connector housing formed in the case, and printing is performed. In a connection structure between a printed wiring board and a bus bar of an electrical junction box, which connects a circuit on a wiring board and a desired bus bar, a terminal portion of a circuit disposed on the board is provided on one side edge of the printed wiring board. are arranged in parallel, and an elastic clamping arm having a contact piece at the end is provided on at least one side edge of a desired busbar selected from the plurality of busbars via a rising base, and the case is provided with an elastic clamping arm facing the elastic clamping arm. An opening is provided and an insertion frame for the printed wiring board is provided, and by inserting the printed wiring board into the insertion frame, the terminal portion of the circuit is held between the bus bar and the elastic holding arm, and the terminal A connection structure between a printed wiring board of an electrical junction box and a bus bar, characterized in that a part and a contact piece are in contact and electrically connected.