A wiring harness continuity test qualified stamp printing device

Abstract

The present invention discloses a wire harness conduction test qualified seal printing device, comprising a support plate, an electric push rod, a seal, a label baffle, a photoelectric switch and a control board, the seal is slidably arranged on the upper side of the support plate, the seal is connected to the electric push rod and driven by the electric push rod to slide back and forth in the horizontal direction on the support plate, the label baffle comprises a front baffle and a rear baffle, the rear baffle is vertically fixed to the front side of the support plate and a through hole matching the seal is opened on the rear baffle, the front baffle is fixed to the front side of the rear baffle and arranged parallel to the rear baffle, the photoelectric switch is fixed to the rear baffle on one side of the through hole, and the photoelectric switch and the electric push rod are respectively connected to the circuit board. The present invention realizes the function of automatic marking through the combination of mechanical structure and control circuit, and has the characteristics of short time consumption, high efficiency and less ink addition, thereby meeting the marking requirements of the wire harness production inspection link.

Description

Technical Field

[0001] The invention relates to a printing device, in particular to a wire harness conduction test qualified stamp printing device, belonging to the field of product inspection. Background Art

[0002] As China's economy continues to soar, people have higher expectations for a better life, and "food, clothing, housing and transportation" are no longer the main problems that plague people's daily lives. Cars have become a common means of transportation for families, and automotive wiring harnesses are the veins of cars, the hub for connecting various systems of cars, and the carrier of electrical signal transmission. Therefore, qualified automotive wiring harnesses are the guarantee for safe driving of cars. When automobile assembly manufacturers receive automotive wiring harnesses produced by automotive wiring harness manufacturers, they first check whether the label of the wiring harness contains a qualified mark to facilitate the traceability of the wiring harness production.

[0003] The wire harness production industry is a typical labor-intensive industry, and many processes are mainly operated manually. In the traditional wire harness production qualification inspection link, the qualified stamp is manually stamped. Not only does it cause a waste of human resources, but more importantly, people are influenced by their subjective initiative and are very likely to stamp unqualified automotive wire harnesses with qualified stamps. Once these defective wire harnesses enter the market, they are very likely to bury safety hazards for cars. When a car with a defective wire harness is driving on the road, once an accident occurs, people’s lives and property will not only be unable to be protected, but there may also be a tragedy of car destruction and death. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a wire harness conduction test qualified stamp printing device, which can automatically print the wire harness qualified stamp.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A wire harness conduction test qualified stamp printing device, characterized in that it comprises a support plate, an electric push rod, a seal, a label baffle, a photoelectric switch and a control board, the seal is slidably arranged on the upper side of the support plate, the seal is connected to the electric push rod and is driven by the electric push rod to slide back and forth in the horizontal direction on the support plate, the label baffle comprises a front baffle and a rear baffle, the rear baffle is vertically fixed on the front side of the support plate and a through hole matching the seal is opened on the rear baffle, the front baffle is fixed on the front side of the rear baffle and is arranged parallel to the rear baffle, the photoelectric switch is fixed on the rear baffle on one side of the through hole, and the photoelectric switch and the electric push rod are respectively connected to the circuit board.

[0007] Furthermore, the structure of the seal sliding setting includes a seal support, a slider and a guide rail, the guide rail is fixedly set on the upper side of the support plate, the slider is set on the guide rail and can slide freely along the track, the seal support is fixed on the upper side of the slider, the seal is fixed in the seal support, one side of the slider is connected to the end of the electric push rod and driven by the electric push rod, the electric push rod is fixed on the support plate and set parallel to the guide rail.

[0008] Furthermore, two folding ears flipped upward in the vertical direction are provided at both ends of the front side of the support plate, and matching screw holes are opened on the two ends of the rear baffle and the folding ears. The rear baffle is fixed to the folding ears on the front side of the support plate by bolt locking. A photoelectric switch hole is also opened on one side of the through hole on the rear baffle. The photoelectric switch is arranged in the photoelectric switch hole and the photoelectric switch is fixed on the support plate. The front baffle is an L-shaped baffle, and one side edge of the L-shaped baffle is arranged in the vertical direction and parallel to the rear baffle, and the other side edge of the L-shaped baffle is arranged in the horizontal direction and fixedly connected to the lower side of the rear baffle.

[0009] Furthermore, the photoelectric switch is a groove-type photoelectric switch, and the groove of the photoelectric switch corresponds to the gap between the front baffle and the rear baffle.

[0010] Furthermore, the control panel is horizontally arranged above the support panel, and the four corners of the control panel are fixed to the support panel via four fixing columns.

[0011] Furthermore, the control board comprises an STM32 minimum system module, a photoelectric switch sensor module, a power conversion module and a motor drive module, and the photoelectric switch sensor module, the power conversion module and the motor drive module are respectively connected to the STM32 minimum system module.

[0012] Further, the STM32 minimum system module includes a single-chip microcomputer chip U1 of model STM32F103RCT6, and pin 42 of U1 is connected to one end of resistor R8, and the other end of resistor R8 is connected to pin 2 of qualified instruction interface P2, and pin 1 of qualified instruction interface P2 is connected to VCC12V, and pin 3 of qualified instruction interface P2 is grounded, and pin 7 of U1 is connected to one end of resistor R53, one end of switch S1 and one end of capacitor C68, and the other end of resistor R58 is connected to VCC3V3, and the other end of switch S1 and the other end of capacitor C68 are grounded, and pin 5 of U1 is connected to one end of crystal oscillator Y1 and one end of capacitor C70, and pin 6 of U1 is connected to the other end of crystal oscillator Y1 and one end of capacitor C69, and the other end of capacitor C69 and the other end of capacitor C70 are grounded.

[0013] Furthermore, the photoelectric switch sensor module includes a photoelectric sensor interface P1, pin 1 of the photoelectric sensor interface P1 is connected to VCC5V and one end of resistor R7, pin 2 of the photoelectric sensor interface P1 is connected to the other end of resistor R7 and pin 15 of U1, and pin 3 of the photoelectric sensor interface P1 is grounded.

[0014] Furthermore, the motor drive module includes an L298N drive chip U2, pins 2, 7, and 6 of U2 are connected to pins 28, 55, and 56 of U1 respectively, pins 8, 1, and 15 of U2 are grounded, pin 9 of U2 is connected to VCC5V, pin 4 of U2 is connected to the cathode of diode D1, the cathode of diode D2, the cathode of diode D3, the cathode of diode D4, and VCC, pin 2 of U2 is connected to the anode of diode D1, the cathode of diode D5, one end of resistor R9, and pin 2 of motor interface P3, and pin 3 of U2 is connected to the anode of diode D2, the cathode of diode D6, pin 1 of motor interface P3, and light emitting diode DL The cathode of light emitting diode 2 and the anode of light emitting diode DL1 are connected to the other end of resistor R9, pin 13 of U2 is connected to the anode of diode D3, the cathode of diode D7 and pin 2 of motor interface P4, pin 14 of U2 is connected to the anode of diode D4, the cathode of diode D8, the cathode of light emitting diode DL3 and the anode of light emitting diode DL4, the anode of light emitting diode DL3 and the cathode of light emitting diode DL4 are connected to pin 1 of motor interface P4, and the anode of diode D5, the anode of diode D6, the anode of diode D7 and the anode of diode D8 are grounded.

[0015] Furthermore, the power conversion module includes a TPS54331 power IC chip U3, pin 1 of U3 is connected to one end of capacitor C1, pin 2 of U3 is connected to one end of resistor R1, one end of capacitor C7, one end of capacitor C6, one end of capacitor C5 and VCC12V, pin 3 of U3 is connected to the other end of resistor R1 and one end of resistor R2, pin 4 of U3 is connected to one end of capacitor C8, the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, the other end of resistor R2 and the other end of capacitor C8 are grounded, and pin 8 of U3 is connected to the other end of capacitor C1, the cathode of diode D10, and the inductor L1. end, the other end of inductor L1 is connected to one end of resistor R4, one end of capacitor C9, one end of capacitor C10, one end of capacitor C11 and VCC3V3, the other end of capacitor C9, the other end of capacitor C10 and the other end of capacitor C11 are grounded, the other end of resistor R4 is connected to one end of resistor R5, the other end of resistor R5 is connected to one end of resistor R6 and pin 5 of U3, the other end of resistor R6 is connected to the anode of diode D10, one end of capacitor C12, one end of resistor R3 and pin 7 of U3 and are grounded, the other end of resistor R3 is connected to one end of capacitor C3, and the other end of capacitor C3 and the other end of capacitor C12 are connected to pin 6 of U3.

[0016] Compared with the prior art, the present invention has the following advantages and effects: the present invention realizes automatic printing of wire harness qualified stamps through a mechanical structure and in cooperation with an electric control board, thereby solving the problems of low efficiency and waste of human resources caused by traditional manual printing of "qualified" stamps, and the marking machine is placed in the wire harness conduction inspection link, and a test success instruction is sent to the marking machine after the conduction detection is successful, which not only reduces one inspection process but also avoids the problem of manually misprinting "qualified" on a defective wire harness; the photoelectric sensor can detect whether a label to be printed exists, and then perform "qualified" printing, thereby avoiding the problem of the marking machine misprinting a label; the marking machine adopts an electric push rod to push the stamp with a full force of 20N, the movement is stable, and the single label printing time of the marking machine is 0.67s, the printing time is short, and the efficiency is high; the qualified stamp adopts a sealed stamp, thereby solving the problem that the existing stamp is exposed to the air for a long time, the ink is easy to dry, and continuous ink addition is required. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a wire harness continuity test qualified stamp printing device of the present invention.

[0018] Figure 2 It is a partial schematic diagram of a wire harness continuity test qualified stamp printing device of the present invention.

[0019] Figure 3 The invention discloses a circuit schematic diagram of an STM32 minimum system module, a photoelectric switch sensor module and a motor drive module of a control board.

[0020] Figure 4 It is a circuit schematic diagram of the power conversion module of the control board of the present invention. DETAILED DESCRIPTION

[0021] In order to elaborate on the technical scheme adopted by the present invention to achieve the predetermined technical purpose, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only partial embodiments of the present invention, rather than all embodiments, and the technical means or technical features in the embodiments of the present invention can be replaced without paying creative work. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0022] like Figure 1 and Figure 2As shown, a wiring harness conduction test qualified stamp printing device of the present invention comprises a support plate 1, an electric push rod 2, a seal 3, a label baffle, a photoelectric switch 4 and a control board 5, the seal 3 is slidably arranged on the upper side of the support plate 1, the seal 3 is connected to the electric push rod 2 and is driven by the electric push rod 2 to slide back and forth on the support plate 1 along the horizontal direction, the label baffle comprises a front baffle 6 and a rear baffle 7, the rear baffle 7 is vertically fixed on the front side of the support plate 1 and a through hole matching the seal is opened on the rear baffle 7, the front baffle 6 is fixed on the front side of the rear baffle 7 and is arranged parallel to the rear baffle 7, the photoelectric switch 4 is fixed on the rear baffle 7 on one side of the through hole, and the photoelectric switch 4 and the electric push rod 2 are respectively connected to the circuit board 5.

[0023] The structure for sliding the seal 3 includes a seal support 8, a slider 9 and a guide rail 10. The guide rail 10 is fixedly arranged on the upper side of the support plate 1. The slider 9 is arranged on the guide rail 10 and can slide freely along the rail 10. The seal support 8 is fixed on the upper side of the slider 9. The seal 3 is fixed in the seal support 8. One side of the slider 9 is connected to the end of the electric push rod 2 and is driven by the electric push rod 2. The electric push rod 2 is fixed on the support plate 1 and is arranged parallel to the guide rail 10. Two folding ears 11 that are turned up in the vertical direction are arranged at both ends of the front side of the support plate 1. The two ends of the rear baffle 7 and the folding ears 11 are provided with screw holes that match each other. The rear baffle 7 is fixed to the folding ears 11 on the front side of the support plate 1 by bolt locking. A photoelectric switch hole is also opened on one side of the through hole of the rear baffle 7. The photoelectric switch 4 is arranged in the photoelectric switch hole and the photoelectric switch 4 is fixedly arranged on the support plate 1. The front baffle 6 is an L-shaped baffle. One side edge of the L-shaped baffle is arranged in the vertical direction and is parallel to the rear baffle 7. The other side edge of the L-shaped baffle is arranged in the horizontal direction and is fixedly connected to the lower side of the rear baffle 7. The photoelectric switch 4 is a groove-type photoelectric switch. The groove of the photoelectric switch 4 corresponds to the gap between the front baffle 6 and the rear baffle 7. When in use, the label is inserted into the gap between the front baffle 6 and the rear baffle 7. The lower side of the label is supported by the horizontal side edge of the front baffle. One side edge of the label is arranged in the groove of the photoelectric switch 4. The photoelectric switch 4 detects whether there is a label.

[0024] The control board 5 is horizontally arranged above the support board 1 , and the four corners of the control board 5 are fixed on the support board 1 through four fixing columns 12 .

[0025] The input voltage of the electric push rod is 12V, the stroke is 25mm, the speed is 15mm / s, and the distance from the end of the qualified seal to the label baffle is 5mm. Therefore, the time for the marking machine to print a label and reset is 0.67s, which can meet the time requirements for label printing in the wire harness production inspection link. The qualified seal works in a press-type manner, and the end is composed of a push-door structure to seal. It solves the problem that the existing seal is exposed to the air for a long time, the ink is easy to dry, and constant ink addition is required. This sealing seal can be used for 14 days after adding ink once, which can meet the number of printing times required in the wire harness production inspection link. The marking also has the function of automatic reset after power failure, which prevents the problem that the push rod cannot return to the origin in the middle of the stroke due to power failure.

[0026] The control board includes an STM32 minimum system module, a photoelectric switch sensor module, a power conversion module and a motor drive module, and the photoelectric switch sensor module, the power conversion module and the motor drive module are respectively connected to the STM32 minimum system module.

[0027] like Figure 3 As shown, the STM32 minimum system module includes a single-chip microcomputer chip U1 of model STM32F103RCT6, the 42nd pin of U1 is connected to one end of resistor R8, the other end of resistor R8 is connected to the 2nd pin of qualified instruction interface P2, the 1st pin of qualified instruction interface P2 is connected to VCC12V, the 3rd pin of qualified instruction interface P2 is grounded, the 7th pin of U1 is connected to one end of resistor R53, one end of switch S1 and one end of capacitor C68, the other end of resistor R58 is connected to VCC3V3, the other end of switch S1 and the other end of capacitor C68 are grounded, the 5th pin of U1 is connected to one end of crystal oscillator Y1 and one end of capacitor C70, the 6th pin of U1 is connected to the other end of crystal oscillator Y1 and one end of capacitor C69, and the other end of capacitor C69 and the other end of capacitor C70 are grounded. The STM32 minimum system module is the core module of the circuit control board, which undertakes the tasks of receiving, storing and sending data signals, receiving the signal of the sensor and realizing the driving of the electric push rod.

[0028] The photoelectric switch sensor module includes a photoelectric sensor interface P1. Pin 1 of the photoelectric sensor interface P1 is connected to VCC5V and one end of the resistor R7. Pin 2 of the photoelectric sensor interface P1 is connected to the other end of the resistor R7 and pin 15 of U1. Pin 3 of the photoelectric sensor interface P1 is grounded. The photoelectric switch is a groove type with a groove width of 3mm, which is used to detect whether there is a label to be printed. When there is a label to be printed, the NPN type sensor outputs 5V, and the STM32 microcontroller can receive the high-level signal of the sensor.

[0029] The motor drive module includes an L298N driver chip U2. Pins 2, 7, and 6 of U2 are connected to pins 28, 55, and 56 of U1 respectively. Pins 8, 1, and 15 of U2 are grounded. Pin 9 of U2 is connected to VCC5V. Pin 4 of U2 is connected to the cathode of diode D1, the cathode of diode D2, the cathode of diode D3, the cathode of diode D4, and VCC. Pin 2 of U2 is connected to the anode of diode D1, the cathode of diode D5, one end of resistor R9, and pin 2 of motor interface P3. Pin 3 of U2 is connected to the anode of diode D2, the cathode of diode D6, pin 1 of motor interface P3, and the cathode of light-emitting diode DL2. The anode of the light emitting diode DL1, the anode of the light emitting diode DL2 and the cathode of the light emitting diode DL1 are connected to the other end of the resistor R9, the 13th pin of U2 is connected to the anode of the diode D3, the cathode of the diode D7 and the 2nd pin of the motor interface P4, the 14th pin of U2 is connected to the anode of the diode D4, the cathode of the diode D8, the cathode of the light emitting diode DL3 and the anode of the light emitting diode DL4, the anode of the light emitting diode DL3 and the cathode of the light emitting diode DL4 are connected to the 1st pin of the motor interface P4, and the anode of the diode D5, the anode of the diode D6, the anode of the diode D7 and the anode of the diode D8 are grounded.

[0030] Since the working voltage of the electric push rod is 12V and the working voltage of the STM32 microcontroller is 3.3V, a power conversion circuit is required to convert the 12V voltage into 3.3V. The power conversion circuit uses the TPS54331 power IC chip, which is a Buck type switching power chip. The Buck type power chip has a high conversion efficiency, and a small part of the conduction loss is converted into heat energy, avoiding the chip heating caused by excessive voltage drop. In formula (1), V OUT (Output voltage to be output) is 3.3V, V ref (reference voltage) is 1.25V. According to the formula, R 5 =3.14R 6 , so R 5 The resistance value is 10.2kΩ, R 6 The resistance value is 3.24kΩ, so the V is 3.3V. OUT Output voltage.

[0031]

[0032] like Figure 4As shown, the power conversion module includes a TPS54331 power IC chip U3, pin 1 of U3 is connected to one end of capacitor C1, pin 2 of U3 is connected to one end of resistor R1, one end of capacitor C7, one end of capacitor C6, one end of capacitor C5 and VCC12V, pin 3 of U3 is connected to the other end of resistor R1 and one end of resistor R2, pin 4 of U3 is connected to one end of capacitor C8, the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, the other end of resistor R2 and the other end of capacitor C8 are grounded, pin 8 of U3 is connected to the other end of capacitor C1, the cathode of diode D10 and one end of inductor L1, The other end of inductor L1 is connected to one end of resistor R4, one end of capacitor C9, one end of capacitor C10, one end of capacitor C11 and VCC3V3, the other end of capacitor C9, the other end of capacitor C10 and the other end of capacitor C11 are grounded, the other end of resistor R4 is connected to one end of resistor R5, the other end of resistor R5 is connected to one end of resistor R6 and pin 5 of U3, the other end of resistor R6 is connected to the anode of diode D10, one end of capacitor C12, one end of resistor R3 and pin 7 of U3 and grounded, the other end of resistor R3 is connected to one end of capacitor C3, the other end of capacitor C3 and the other end of capacitor C12 are connected to pin 6 of U3. The electric push rod uses a 12V DC motor, so the L298N chip driver can be selected. The circuit diagram is as follows Figure 2 The motor drive module in the marking machine is shown in Figure 1. The actuator of the marking machine has a relatively simple action. The push rod moves in a straight line. The L298N contains two H-bridge high-voltage and high-current dual full-bridge drivers, which can drive the DC motor to rotate. The STM32 microcontroller outputs TTL logic level signals to control IN1, IN2, and EN1, thereby realizing the control of the electric push rod. The marking machine realizes the function of automatic marking through the combination of mechanical structure and control circuit, and has the characteristics of short time consumption, high efficiency, and less ink addition, thereby meeting the marking needs of the wire harness production inspection link.

[0033] The present invention realizes automatic printing of wire harness qualified stamps through mechanical structure and in cooperation with the electric control board, thus solving the problems of low efficiency and waste of human resources caused by traditional manual printing of "qualified" stamps, and the marking machine is placed in the wire harness conduction inspection link, and a test success instruction is sent to the marking machine after the conduction detection is successful, which not only reduces one inspection process but also avoids the problem of manually misprinting "qualified" on defective wire harnesses; the photoelectric sensor can detect whether the label to be printed exists, and then perform "qualified" printing, thus avoiding the problem of the marking machine misprinting labels, and the marking machine adopts an electric push rod to push the stamp with a full force of 20N, so the movement is stable and the single label printing time of the marking machine is 0.67s, so the printing time is short and the efficiency is high, and the qualified stamp adopts a sealed stamp, thus solving the problem of the existing stamp being exposed to the air for a long time, the ink is easy to dry, and the ink needs to be added continuously.

[0034] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A wiring harness continuity test pass stamp printing device, characterized in that: It comprises a support plate, an electric push rod, a seal, a label baffle, a photoelectric switch and a control board. The seal is slidably arranged on the upper side of the support plate. The seal is connected to the electric push rod and driven by the electric push rod to slide back and forth horizontally on the support plate. The label baffle comprises a front baffle and a rear baffle. The rear baffle is vertically fixed on the front side of the support plate and has a through hole matching the seal. The front baffle is fixed on the front side of the rear baffle and is arranged parallel to the rear baffle. The photoelectric switch is fixed on the rear baffle on one side of the through hole. The photoelectric switch and the electric push rod are respectively connected to the circuit board. The support plate Two folding ears turned up in the vertical direction are arranged at both ends of the front side of the rear baffle, and screw holes matching each other are opened on the two ends of the rear baffle and the folding ears. The rear baffle is fixed to the folding ears on the front side of the support plate by bolt locking. A photoelectric switch hole is also opened on one side of the through hole on the rear baffle, and the photoelectric switch is arranged in the photoelectric switch hole and fixedly arranged on the support plate. The front baffle is an L-shaped baffle, and one side edge of the L-shaped baffle is arranged in the vertical direction and parallel to the rear baffle, and the other side edge of the L-shaped baffle is arranged in the horizontal direction and fixedly connected to the lower side of the rear baffle; The structure of the seal sliding setting includes a seal support, a slider and a guide rail, the guide rail is fixedly set on the upper side of the support plate, the slider is set on the guide rail and can slide freely along the track, the seal support is fixed on the upper side of the slider, the seal is fixed in the seal support, one side of the slider is connected to the end of the electric push rod and driven by the electric push rod, the electric push rod is fixed on the support plate and set parallel to the guide rail; the photoelectric switch is a groove type photoelectric switch, and the groove of the photoelectric switch corresponds to the gap between the front baffle and the rear baffle.

2. A wiring harness continuity test pass stamp printing device according to claim 1, characterized in that: The control panel is horizontally arranged above the support panel, and the four corners of the control panel are fixed on the support panel through four fixing columns.

3. A wiring harness continuity test pass stamp printing device according to claim 1, characterized in that: The control board comprises an STM32 minimum system module, a photoelectric switch sensor module, a power conversion module and a motor drive module, and the photoelectric switch sensor module, the power conversion module and the motor drive module are respectively connected to the STM32 minimum system module.

4. A wiring harness continuity test pass stamp printing device according to claim 3, characterized in that: The STM32 minimum system module includes a single-chip microcomputer chip U1 of model STM32F103RCT6, pin 42 of U1 is connected to one end of resistor R8, the other end of resistor R8 is connected to pin 2 of qualified instruction interface P2, pin 1 of qualified instruction interface P2 is connected to VCC12V, pin 3 of qualified instruction interface P2 is grounded, pin 7 of U1 is connected to one end of resistor R53, one end of switch S1 and one end of capacitor C68, the other end of resistor R53 is connected to VCC3V3, the other end of switch S1 and the other end of capacitor C68 are grounded, pin 5 of U1 is connected to one end of crystal oscillator Y1 and one end of capacitor C70, pin 6 of U1 is connected to the other end of crystal oscillator Y1 and one end of capacitor C69, and the other end of capacitor C69 and the other end of capacitor C70 are grounded.

5. A wiring harness continuity test pass stamp printing device according to claim 4, characterized in that: The photoelectric switch sensor module includes a photoelectric sensor interface P1, wherein pin 1 of the photoelectric sensor interface P1 is connected to VCC5V and one end of a resistor R7, pin 2 of the photoelectric sensor interface P1 is connected to the other end of the resistor R7 and pin 15 of U1, and pin 3 of the photoelectric sensor interface P1 is grounded.

6. A wiring harness continuity test pass stamp printing device according to claim 4, characterized in that: The motor drive module includes an L298N drive chip U2, wherein pins 5, 7, and 6 of U2 are connected to pins 28, 55, and 56 of U1 respectively, pins 8, 1, and 15 of U2 are grounded, pin 9 of U2 is connected to VCC5V, pin 4 of U2 is connected to the cathode of diode D1, the cathode of diode D2, the cathode of diode D3, the cathode of diode D4, and VCC, pin 2 of U2 is connected to the anode of diode D1, the cathode of diode D5, one end of resistor R9, and pin 2 of motor interface P3, and pin 3 of U2 is connected to the anode of diode D2, the cathode of diode D6, pin 1 of motor interface P3, and the cathode of light emitting diode DL2. The cathode, the anode of the light-emitting diode DL1, the anode of the light-emitting diode DL2 and the cathode of the light-emitting diode DL1 are connected to the other end of the resistor R9, the 13th pin of U2 is connected to the anode of the diode D3, the cathode of the diode D7 and the 2nd pin of the motor interface P4, the 14th pin of U2 is connected to the anode of the diode D4, the cathode of the diode D8, the cathode of the light-emitting diode DL3 and the anode of the light-emitting diode DL4, the anode of the light-emitting diode DL3 and the cathode of the light-emitting diode DL4 are connected to the 1st pin of the motor interface P4, and the anode of the diode D5, the anode of the diode D6, the anode of the diode D7 and the anode of the diode D8 are grounded.

7. A wiring harness continuity test pass stamp printing device according to claim 4, characterized in that: The power conversion module includes a TPS54331 power IC chip U3, wherein pin 1 of U3 is connected to one end of capacitor C1, pin 2 of U3 is connected to one end of resistor R1, one end of capacitor C7, one end of capacitor C6, one end of capacitor C5 and VCC12V, pin 3 of U3 is connected to the other end of resistor R1 and one end of resistor R2, pin 4 of U3 is connected to one end of capacitor C8, the other end of capacitor C5, the other end of capacitor C6, the other end of capacitor C7, the other end of resistor R2 and the other end of capacitor C8 are grounded, and pin 8 of U3 is connected to the other end of capacitor C1, the cathode of diode D10 and one end of inductor L1. The other end of inductor L1 is connected to one end of resistor R4, one end of capacitor C9, one end of capacitor C10, one end of capacitor C11 and VCC3V3, the other end of capacitor C9, the other end of capacitor C10 and the other end of capacitor C11 are grounded, the other end of resistor R4 is connected to one end of resistor R5, the other end of resistor R5 is connected to one end of resistor R6 and pin 5 of U3, the other end of resistor R6 is connected to the anode of diode D10, one end of capacitor C12, one end of resistor R3 and pin 7 of U3 and are grounded, the other end of resistor R3 is connected to one end of capacitor C3, the other end of capacitor C3 and the other end of capacitor C12 are connected to pin 6 of U3.

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