CN109821104B

CN109821104B - Auxiliary positioning device for puncture of port seat of infusion

Info

Publication number: CN109821104B
Application number: CN201910261326.2A
Authority: CN
Inventors: 胡汉美; 黄奕铮; 李一桔; 陆萍; 张韫玉; 陆丽华
Original assignee: Affiliated Hospital of Nantong University
Current assignee: Affiliated Hospital of Nantong University
Priority date: 2019-04-02
Filing date: 2019-04-02
Publication date: 2021-04-16
Anticipated expiration: 2039-04-02
Also published as: CN109821104A

Abstract

The invention discloses an auxiliary positioning device for puncture of a transfusion harbor port seat, which comprises a first clamping plate and a perspective imaging box, wherein a second clamping plate is connected above the first clamping plate, a first pressing rod is arranged on the left side of the first clamping plate, a ring is fixed at the left end of the first pressing rod, and a second pressing rod is arranged below the first pressing rod. The metal detection sensor is arranged in the blood vessel puncture needle, so that metal in the injection seat base can be detected, the indicator lamp can be lightened after the metal is detected, medical staff can be indicated to quickly judge the correct position of the injection seat base of the infusion port, the success rate of puncture is improved, the infrared diode is arranged to emit infrared light to irradiate the skin of a patient, and the blood vessel of the patient and the injection seat base of the infusion port are subjected to perspective imaging through the action of the image sensor and the projection lens, so that the blood vessel distribution of a puncture part is displayed, the blood vessel puncture in the puncture process is avoided, bleeding is avoided, and the success rate of puncture is greatly improved.

Description

Auxiliary positioning device for puncture of port seat of infusion

Technical Field

The invention relates to the technical field of medical instruments, in particular to an auxiliary positioning device for puncture of a port seat of an infusion port.

Background

The implanted medicine feeder is also called as a transfusion port, which is a medium-long term implanted venous access system and is mainly used for medium-long term treatment needing repeated venous vessel puncture, such as intravenous administration, fluid infusion, parenteral nutrition and blood transfusion, blood sampling and the like, the transfusion port comprises an injection seat base, a catheter which can be connected to the injection seat base and a catheter interface, the injection seat base consists of a high-compression silica gel diaphragm, a medicine cavity and a base shell, and liquid can be injected into the medicine cavity by inserting a special needle of the implanted medicine feeder into the medicine cavity through the high-compression silica gel diaphragm, and the transfusion port has the advantages that: because the operation is simple, and the implantation is performed subcutaneously, the risk of infection is reduced, the times of puncturing the blood vessel are reduced, the blood vessel is protected, the chance of drug extravasation is reduced, the maintenance is simple, the maintenance is performed once after 4 weeks in the intermittent treatment period, in addition, a 19G non-invasive puncture needle can be punctured 1000 times according to a puncture membrane, the butterfly wing needle is continuously used for 7 days for calculation, and the transfusion port can be used for 19 years.

At present medical personnel when carrying out infusion port seat puncture for the patient, all be equivalent to the same blind of vein puncture and wear, can puncture the blood vessel at the puncture in-process sometimes, arouse the hemorrhage, puncture position holds inaccurately sometimes, can't once only puncture successfully, cause high compression silica gel diaphragm to puncture repeatedly easily, influence the life of high compression silica gel diaphragm, cause the weeping easily, bring very big inconvenience for medical personnel and patient, and, current infusion port positioner's location effect is poor, be difficult to carefully visit patient's blood vessel and the problem of infusion port base, for this, we provide a higher infusion port seat puncture auxiliary positioning device of practicality.

Disclosure of Invention

The invention aims to provide an auxiliary positioning device for puncture of an infusion port seat, which solves the problems that the existing medical staff puncture the infusion port seat for a patient in the prior art like venipuncture blindly, sometimes puncture blood vessels in the puncture process to cause bleeding, sometimes hold the puncture position inaccurately, can not puncture the puncture position successfully at one time, easily cause repeated puncture of a high-compression silica gel membrane, influence on the service life of the high-compression silica gel membrane, easily cause liquid leakage, bring great inconvenience to the medical staff and the patient, and the existing positioning device for the infusion port has poor positioning effect and is difficult to probe the blood vessels and the infusion port seat of the patient.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an infusion port seat puncture auxiliary positioning device, includes first splint and perspective formation of image case, the top of first splint is connected with the second splint, and installs first depression bar in the left side of first splint, the left end of first depression bar is fixed with the ring, and the below of first depression bar settles and have the second depression bar.

Preferably, the pin shaft is installed at the intersection of the first clamping plate and the first pressing rod with the second clamping plate and the second pressing rod, the first clamping plate and the second clamping plate are of arc-shaped structures, the first clamping plate and the second pressing rod are vertically symmetrical with the second clamping plate and the first pressing rod about the horizontal center line of the pin shaft, and a rotating structure is formed between the first clamping plate and the pin shaft, and between the second clamping plate and the pin shaft, the rotating structure is formed.

Preferably, the inside of first splint is fixed with the pilot lamp, and the metal detection sensor is all installed to the left and right sides of pilot lamp, the even equidistance distribution of pilot lamp is in the inside of first splint, and the connected mode between pilot lamp and the metal detection sensor is electric connection.

Preferably, the outer surface of the first pressure lever is connected with a paste layer, a silica gel sleeve is arranged outside the paste layer, the silica gel sleeve is of an elastic structure, and a full surrounding structure is formed between the silica gel sleeve and the first pressure lever.

Preferably, the inner side surfaces of the first pressure lever and the second pressure lever are respectively fixed with a limiting plate, a return spring is arranged in the middle of the limiting plate, the first pressure lever forms an elastic structure with the second pressure lever through the return spring, and a semi-surrounding structure is formed between the limiting plate and the return spring.

Preferably, the upper end of round pin axle is fixed with the connecting rod, and the upper end of connecting rod installs decides the pole, the internally mounted of round pin axle has the controller, and the below of controller is fixed with bee calling organ, the internal connection who decides the pole moves the pole, move the pole and run through in the inside of deciding the pole, and move and constitute extending structure between pole and the deciding the pole.

Preferably, the upper end of moving the pole is fixed with the base pole, and the external connection of base pole has the lantern ring, the horizontal pole is installed to the right-hand member of lantern ring, constitute revolution mechanic between lantern ring and the base pole, and the turned angle between lantern ring and the base pole is 0-360.

Preferably, the lower right corner of horizontal pole is fixed with the connecting piece, and the outside of connecting piece is provided with the draw-in groove, perspective imaging box installs in the lower extreme of connecting piece, the structure of connecting piece and draw-in groove is spherical structure, and closely laminates between connecting piece and the draw-in groove.

Preferably, a button battery is installed inside the perspective imaging box, an image processing chip is arranged on the lower right corner of the button battery, infrared diodes are installed on the lower left corner and the lower right corner of the perspective imaging box, a projection lens is fixed below the clamping groove, image sensors are fixed on the left side and the right side of the projection lens, the image sensors are bilaterally symmetrical about the vertical center line of the projection lens, and the image sensors are electrically connected with the projection lens.

Compared with the prior art, the invention has the following beneficial effects:

1. the first clamping plate and the second clamping plate are both arc-shaped and are matched with the shape of the injection seat base of the infusion port, and the first clamping plate, the second clamping plate, the first pressure rod and the second pressure rod can rotate around the pin shaft so as to change the distance between the first clamping plate and the second clamping plate, so that the injection seat base of the infusion port can be clamped conveniently;

2. according to the invention, the indication lamp and the metal detection sensor are arranged in the first clamping plate and the second clamping plate, wherein the metal detection sensor can detect metal in the injection seat base, and the indication lamp can be lightened after the metal is detected, so that medical personnel can be indicated to quickly judge the correct position of the injection seat base of the infusion port, and the success rate of puncture is improved;

3. according to the invention, the reset spring is connected between the first pressure rod and the second pressure rod, so that when the first clamping plate and the second clamping plate clamp the injection seat base of the infusion port, the reset spring is in a compressed state, and the reset spring can reversely press the first clamping plate and the second clamping plate, so that the first clamping plate and the second clamping plate can clamp the injection seat base of the infusion port, and puncture is facilitated;

4. the invention is provided with the lantern ring sleeved outside the base rod, so that the cross rod can rotate around the base rod as a shaft, thereby changing the position of the perspective imaging part, expanding the working range of the perspective imaging part, so that medical personnel can observe the blood vessel distribution around the injection seat base of the infusion port, arranging the connecting piece and the clamping groove to be spherical, and clamping the connecting piece in the clamping groove, so that the connecting piece can rotate within a certain range, thereby being convenient for changing the angle of the perspective imaging box and carrying out the perspective imaging of the blood vessel;

5. according to the invention, the infrared diode is arranged to emit infrared light to irradiate the skin of a patient, and the blood vessel of the patient is subjected to perspective imaging under the action of the image sensor and the projection lens, so that the blood vessel distribution of a puncture part is displayed, the blood vessel is prevented from being punctured in the puncture process to cause bleeding, the injection seat base of the infusion port can be subjected to perspective imaging according to the same principle, the position of the injection seat base of the infusion port can be accurately seen, and the puncture success rate is greatly improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1A;

FIG. 3 is a schematic bottom view of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3B;

FIG. 5 is a schematic view of the internal structure of the imaging box of the present invention;

FIG. 6 is a schematic diagram of the working process of the present invention.

In the figure: 1. a first splint; 2. a second splint; 3. a first pressure lever; 4. a ring; 5. a second compression bar; 6. a pin shaft; 7. an indicator light; 8. a metal detection sensor; 9. a bonding layer; 10. a silica gel sleeve; 11. a limiting plate; 12. a return spring; 13. a connecting rod; 14. fixing a rod; 15. a moving bar; 16. a base rod; 17. a collar; 18. a cross bar; 19. a connecting member; 20. a controller; 21. a buzzer; 22. a card slot; 23. a perspective imaging box; 24. a button cell; 25. an image processing chip; 26. an infrared diode; 27. a projection lens; 28. an image sensor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-6, an auxiliary positioning device for port seat puncture of infusion includes a first clamping plate 1, a second clamping plate 2, a first pressing rod 3, a ring 4, a second pressing rod 5, a pin 6, an indicator light 7, a metal detection sensor 8, an adhesive layer 9, a silica gel sleeve 10, a limiting plate 11, a reset spring 12, a connecting rod 13, a fixed rod 14, a moving rod 15, a base rod 16, a lantern ring 17, a cross rod 18, a connecting piece 19, a controller 20, a buzzer 21, a clamping groove 22, a perspective imaging box 23, a button cell 24, an image processing chip 25, an infrared diode 26, a projection lens 27 and an image sensor 28, wherein the second clamping plate 2 is connected above the first clamping plate 1, the first pressing rod 3 is installed on the left side of the first clamping plate 1, the ring 4 is fixed on the left end of the first pressing rod 3, the second pressing rod 5 is installed below the first pressing rod 3, the first clamping plate 1, the first pressing rod 3, the second clamping plate 2 and the second pressing rod 5 are installed with the pin 6 at the crossing positions, the structure of the first clamping plate 1 and the second clamping plate 2 is an arc-shaped structure, the first clamping plate 1, the second pressing rod 5, the second clamping plate 2 and the first pressing rod 3 are vertically symmetrical about the horizontal center line of the pin shaft 6, a rotating structure is formed between the first clamping plate 1, the second clamping plate 2 and the pin shaft 6, the first clamping plate 1 and the second clamping plate 2 are both arranged to be arc-shaped and are matched with the shape of an injection seat base of the infusion port, and the first clamping plate 1, the second clamping plate 2, the first pressing rod 3 and the second pressing rod 5 can rotate around the pin shaft 6 so as to change the distance between the first clamping plate 1 and the second clamping plate 2, so that the injection seat base of the infusion port can be clamped conveniently;

an indicator light 7 is fixed inside the first clamp plate 1, metal detection sensors 8 are installed on the left side and the right side of the indicator light 7, the indicator light 7 is uniformly and equidistantly distributed inside the first clamp plate 1, the indicator light 7 is electrically connected with the metal detection sensors 8, the indicator light 7 and the metal detection sensors 8 are installed inside the first clamp plate 1 and the second clamp plate 2, the metal detection sensors 8 can detect metal inside an injection seat base, the indicator light 7 can be turned on after the metal is detected, so that medical personnel can be indicated to quickly judge the correct position of the injection seat base of an infusion port, the success rate of puncture is improved, the outer surface of the first pressure rod 3 is connected with an adhesive layer 9, a silica gel sleeve 10 is installed outside the adhesive layer 9, the silica gel sleeve 10 is of an elastic structure, and a full-surrounding structure is formed between the silica gel sleeve 10 and the first pressure rod 3, the outer surfaces of the first clamping plate 1, the second clamping plate 2, the first pressure rod 3 and the second pressure rod 5 are all wrapped with a layer of silica gel sleeve 10, and the silica gel sleeve 10 is made of a silica gel material with certain elasticity, has a smooth surface, can reduce the discomfort of a patient when being contacted with the skin of the patient, and avoids the extrusion injury to the epidermis skin of the patient;

the inner side surfaces of the first pressure lever 3 and the second pressure lever 5 are both fixed with a limiting plate 11, a return spring 12 is arranged in the middle of the limiting plate 11, the first pressure lever 3 and the second pressure lever 5 form an elastic structure through the return spring 12, a semi-enclosed structure is formed between the limiting plate 11 and the return spring 12, the return spring 12 is arranged between the first pressure lever 3 and the second pressure lever 5, so that when the first clamping plate 1 and the second clamping plate 2 clamp the injection seat base of the transfusion port, the return spring 12 is in a compressed state, and the return spring 12 can reversely press the first clamping plate 1 and the second clamping plate 2, so that the first clamping plate 1 and the second clamping plate 2 can clamp the injection seat base of the transfusion port, so as to facilitate puncture, the return spring 12 is arranged between the two limiting plates 11, the limiting plate 11 can enhance the supporting stability of the return spring 12, and the upper end of the pin shaft 6 is fixed with a connecting rod 13, a fixed rod 14 is arranged at the upper end of the connecting rod 13, a controller 20 is arranged inside the pin shaft 6, a buzzer 21 is fixed below the controller 20, a moving rod 15 is connected inside the fixed rod 14, the moving rod 15 penetrates through the fixed rod 14, a telescopic structure is formed between the moving rod 15 and the fixed rod 14, and the moving rod 15 and the fixed rod 14 can be arranged to be telescopic so as to change the height of a perspective imaging part in the whole device according to actual conditions, so that not only is more accurate positioning imaging convenient, but also the situation that the perspective imaging part can block a puncture position is avoided, and medical staff can puncture the device;

a base rod 16 is fixed at the upper end of the moving rod 15, a lantern ring 17 is connected to the outer portion of the base rod 16, a cross rod 18 is installed at the right end of the lantern ring 17, a rotating structure is formed between the lantern ring 17 and the base rod 16, the rotating angle between the lantern ring 17 and the base rod 16 is 0-360 degrees, the lantern ring 17 is arranged to be sleeved on the outer portion of the base rod 16, so that the cross rod 18 can rotate around the base rod 16 as a shaft, the position of a perspective imaging part is changed, the working range of the perspective imaging part is expanded, so that medical staff can observe blood vessel distribution around an injection seat base of a transfusion port, a connecting piece 19 is fixed at the lower right corner of the cross rod 18, a clamping groove 22 is formed in the outer portion of the connecting piece 19, a perspective imaging box 23 is installed at the lower end of the connecting piece 19, the connecting piece 19 and the clamping groove, the connecting piece 19 and the clamping groove 22 are both spherical, and the connecting piece 19 is clamped in the clamping groove 22 and can rotate within a certain range, so that the angle of the perspective imaging box 23 can be changed, and the blood vessel perspective imaging can be conveniently carried out;

a button cell 24 is arranged in the perspective imaging box 23, an image processing chip 25 is arranged at the lower right corner of the button cell 24, infrared diodes 26 are arranged at the lower left corner and the lower right corner of the perspective imaging box 23, a projection lens 27 is fixed below the clamping groove 22, image sensors 28 are fixed at the left side and the right side of the projection lens 27, the image sensors 28 are bilaterally symmetrical about the vertical center line of the projection lens 27, the image sensors 28 are electrically connected with the projection lens 27, the infrared diodes 26 are arranged to emit infrared light to irradiate the skin of a patient, and the blood vessels of the patient are subjected to perspective imaging under the action of the image sensors 28 and the projection lens 27 so as to display the blood vessel distribution of a puncture part and avoid puncturing the blood vessels in the puncture process to cause bleeding, and the injection seat base of the infusion port can also be subjected to perspective imaging according to the same principle, the position of the injection seat base of the transfusion port can be accurately seen, so that the success rate of puncture is greatly improved.

The working principle is as follows: for the auxiliary positioning device for the puncture of the infusion port seat, which is mainly suitable for the port seat internally containing metal elements and implanted with a positioner, firstly, the button cell 24 can supply power for the whole device, when the infusion port seat needs to be positioned and punctured, firstly, medical staff stretches into the finger ring 4 AT the left end of the first pressure rod 3 by using a left index finger, and simultaneously, a left thumb is enabled to penetrate into the finger ring 4 AT the left end of the second pressure rod 5, the whole device is lifted to be close to the body of a patient for detection, because the infusion port seat internally contains metal, when the whole device approaches the infusion port seat, the metal detection sensor 8 with the model of GL-8F can detect the position information of the infusion port seat and transmit the information to the controller 20 with the model of AT89C51, the controller 20 analyzes and processes the information, and simultaneously controls the buzzer 21 with the model of 9018 to be started and the indicator lamp 7 to be turned on, the buzzer 21 sounds, the indicator light 7 lights to indicate the medical staff to position the transfusion harbor seat, when the specific position of the transfusion harbor seat is found, the index finger and the thumb of the left hand of the medical staff press inwards to shorten the distance between the first pressure rod 3 and the second pressure rod 5, and simultaneously the first splint 1, the second splint 2, the first pressure rod 3 and the second pressure rod 5 rotate around the pin shaft 6 to increase the distance between the first splint 1 and the second splint 2, and then the first splint 1 and the second splint 2 clamp the transfusion harbor seat through the skin of the patient, because the outer surfaces of the first splint 1, the second splint 2, the first pressure rod 3 and the second pressure rod 5 are coated with a layer of silica gel sleeve 10 by the adhesive layer 9, the silica gel sleeve 10 contacts with the skin at the moment, the discomfort of the patient is relieved, then the first pressure rod 3 and the second pressure rod 5 are loosened, and because the transfusion harbor seat is clamped between the first splint 1 and the second splint 2, therefore, the reset spring 12 is in a compressed state in the limiting plate 11, the reset spring 12 generates a reverse acting force, so that the first clamping plate 1 and the second clamping plate 2 can clamp the transfusion harbor seat, meanwhile, the limiting plate 11 limits the reset spring 12, the longitudinal bending of the reset spring 12 is avoided, the stable state is maintained, then the moving rod 15 is pulled upwards, the fixed rod 14 is fixed on the pin shaft 6 through the thread action between the fixed rod 14 and the connecting rod 13, the moving rod 15 can be pulled out from the fixed rod 14, the height of the base rod 16 is driven to rise, when the blood vessel distribution around the transfusion harbor seat needs to be observed, the perspective imaging box 23 is rotated on the vertical plane, so that the friction rotation is generated between the clamping groove 22 and the connecting piece 19, the angle formed by the perspective imaging box 23 and the horizontal plane can be changed, the cross rod 18 is rotated on the horizontal plane, the base rod 16 and the lantern ring 17 are rotated, then turning on an infrared diode 26 with the model of IR, the infrared diode 26 emits infrared light to irradiate on the skin of a patient, because oxyhemoglobin and blood-nourishing hemoglobin in the blood vessel of a human body have stronger infrared light absorption capacity relative to other tissues, the reflected infrared light is less, blood vessel shadows are formed, because metal is contained in an injection seat base of the transfusion port and has stronger infrared light absorption capacity, the injection seat base also forms shadows, an OV7950 image sensor 28 can receive infrared light information reflected by the skin and transmits the information to an image processing chip 25 with the model of OV7640, the image processing chip 25 analyzes and processes the image information and transmits the information to a projection lens 27 with the model of CW-0620-2MP for projection, and then a blood vessel distribution image is projected on the skin of the patient, at the moment, the puncture is carried out by avoiding the blood vessel, thus completing the use process of the whole transfusion harbor seat puncture auxiliary positioning device.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an infusion port seat puncture auxiliary positioning device, includes first splint (1) and perspective formation of image case (23), its characterized in that: a second clamping plate (2) is connected above the first clamping plate (1), a first pressing rod (3) is installed on the left side of the first clamping plate (1), a ring (4) is fixed at the left end of the first pressing rod (3), and a second pressing rod (5) is arranged below the first pressing rod (3); a pin shaft (6) is arranged at the intersection of the first clamping plate (1) and the first pressing rod (3) and the second clamping plate (2) and the second pressing rod (5), the first clamping plate (1) and the second clamping plate (2) are of arc structures, the first clamping plate (1), the second pressing rod (5), the second clamping plate (2) and the first pressing rod (3) are vertically symmetrical about the horizontal center line of the pin shaft (6), and a rotating structure is formed between the first clamping plate (1), the second clamping plate (2) and the pin shaft (6); a connecting rod (13) is fixed at the upper end of the pin shaft (6), a fixed rod (14) is installed at the upper end of the connecting rod (13), a controller (20) is installed inside the pin shaft (6), a buzzer (21) is fixed below the controller (20), a moving rod (15) is connected inside the fixed rod (14), the moving rod (15) penetrates through the inside of the fixed rod (14), and a telescopic structure is formed between the moving rod (15) and the fixed rod (14); move the upper end of pole (15) and be fixed with base pole (16), and the external connection of base pole (16) has lantern ring (17), horizontal pole (18) are installed to the right-hand member of lantern ring (17), constitute revolution mechanic between lantern ring (17) and base pole (16), and the turned angle between lantern ring (17) and base pole (16) is 0-360.

2. The infusion port seat puncture auxiliary positioning device according to claim 1, characterized in that: the inside of first splint (1) is fixed with pilot lamp (7), and the left and right sides of pilot lamp (7) all installs metal detection sensor (8), pilot lamp (7) even equidistance distribution is in the inside of first splint (1), and the connected mode between pilot lamp (7) and metal detection sensor (8) is electric connection.

3. The infusion port seat puncture auxiliary positioning device according to claim 1, characterized in that: the outer surface of first depression bar (3) is connected with pastes layer (9), and the externally mounted who pastes layer (9) has silica gel cover (10), the structure of silica gel cover (10) is elastic structure, and constitutes between silica gel cover (10) and first depression bar (3) and fully surrounds the structure.

4. The infusion port seat puncture auxiliary positioning device according to claim 1, characterized in that: limiting plates (11) are fixed on the inner side faces of the first pressing rod (3) and the second pressing rod (5), a return spring (12) is installed at the middle position of each limiting plate (11), the first pressing rod (3) forms an elastic structure between the return spring (12) and the second pressing rod (5), and a semi-surrounding structure is formed between the limiting plates (11) and the return spring (12).

5. The infusion port seat puncture auxiliary positioning device according to claim 1, characterized in that: the right lower corner of horizontal pole (18) is fixed with connecting piece (19), and the outside of connecting piece (19) is provided with draw-in groove (22), perspective formation of image case (23) are installed in the lower extreme of connecting piece (19), the structure of connecting piece (19) and draw-in groove (22) is spherical structure, and closely laminates between connecting piece (19) and draw-in groove (22).

6. The infusion port seat puncture auxiliary positioning device of claim 5, characterized in that: the inside of perspective imaging case (23) is installed button cell (24), and the lower right corner of button cell (24) settles and have image processing chip (25), infrared diode (26) are installed to the lower left corner and the lower right corner of perspective imaging case (23), the below of draw-in groove (22) is fixed with projection lens (27), and projection lens (27)'s the left and right sides all is fixed with image sensor (28), image sensor (28) are about projection lens (27)'s vertical central line bilateral symmetry, and the connected mode between image sensor (28) and projection lens (27) is electric connection.