Electronic measuring device for detecting welding length of contact pin

Abstract

The utility model provides an electronic measuring device for pin welding length detection. The electronic measuring device mainly improves the efficiency of length detection after circuit board pin welding and reduces detection errors. According to the scheme, the device comprises a PCB fixing part, a displacement measuring part, a displacement sensor and an axial fixing device; the displacement sensor is arranged in the displacement measuring part and is fixed through the axial fixing device; a to-be-tested circuit board is fixed on the PCB fixing part, the contact pin on the to-be-tested circuit board presses the displacement sensor, the displacement sensor detects the displacement distance, and the displacement distance is the length of the contact pin on the to-be-tested circuit board; according to the invention, the pins of a plurality of circuit boards can be automatically measured at the same time, the problem of large product detection error in the pin measurement process is solved, and the detection precision and detection efficiency of the product are effectively improved at the same time.

Description

Technical Field

[0001] This invention belongs to the field of high-precision displacement detection, and mainly relates to an electronic measuring device for detecting the welding length of insert pins. Background Technology

[0002] Existing methods for measuring the length of soldered pins on semi-finished circuit boards use two standard-thickness metal molds with through holes to measure the upper and lower limits of the soldered pin length, and the data is recorded visually. This method has two drawbacks: large measurement errors and low efficiency, failing to effectively guarantee product quality. To address these issues, a high-precision electronic measuring device is designed for measuring the length of soldered circuit board pins, thereby ensuring product quality and improving production efficiency. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, improve the efficiency of pin length detection after soldering on circuit boards, and reduce detection errors, this invention provides an electronic measuring device for pin soldering length detection.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] An electronic measuring device for detecting the soldering length of a pin includes a PCB fixing part, a displacement measuring part, a displacement sensor, and an axial fixing device. The PCB fixing part is a cylinder. The displacement measuring part is a hollow cylinder. The PCB fixing part and the displacement measuring part are coaxial. The bottom surface of the PCB fixing part is fixedly connected to the top surface of the displacement measuring part. A displacement sensor is axially disposed inside the displacement measuring part. A pin detection hole is disposed on the top surface of the PCB fixing part. The pin detection hole is a through hole. The detection end of the displacement sensor is disposed in the pin detection hole. The detection end of the displacement sensor is coplanar with the top surface of the PCB fixing part. An axial fixing device is disposed on the output end of the displacement sensor. The axial fixing device is a circular thin sheet. The axial fixing device is coaxial with the displacement measuring part. A sensor fixing and positioning hole is disposed on the surface of the axial fixing device. The sensor fixing and positioning hole is coaxial with the pin detection hole. The output end of the displacement sensor is embedded in the sensor fixing and positioning hole. The output end of the displacement sensor is connected to an external signal cable. The coaxial sensor fixing and positioning hole, the pin detection hole, and the displacement sensor constitute a detection mechanism.

[0006] Furthermore, the outer wall of the displacement measuring unit is provided with fixing holes evenly distributed along the axial direction; the fixing holes are through holes; fastening screws are installed in the fixing holes; the fastening screws fix the displacement sensor.

[0007] Furthermore, a groove is provided on the top surface of the PCB fixing part; the bottom surface of the groove is the circuit board detection plane; the detection end of the displacement sensor 5 is coplanar with the circuit board detection plane; the groove is used to fix the circuit board to be tested.

[0008] Furthermore, the number of the testing institutions is greater than one.

[0009] Furthermore, the bottom surface of the groove is circular.

[0010] Furthermore, the displacement sensor is a spring-loaded pen-type displacement sensor.

[0011] The beneficial effects of this invention are: by using multiple sets of detection mechanisms, the pins of the circuit board can be automatically measured simultaneously; this solves the problem of large product detection errors in the pin measurement process, and effectively improves the detection accuracy and efficiency of the product, providing strong quality assurance for subsequent processing and testing, and ensuring the overall performance of the product. Attached Figure Description

[0012] Figure 1 This is a front view of the mechanical structure diagram of the testing device;

[0013] Figure 2 This is a top view of the mechanical structure of the testing device;

[0014] Figure 3 This is a schematic diagram of the axial fixing device for the displacement sensor.

[0015] In the diagram, 1-1-PCB fixing part; 1-2-displacement measuring part; 1-3-pin detection hole; 1-3-circuit board detection plane; 2-fastening screw; 3-axial fixing device; 3-1-sensor fixing and positioning hole; 4-sensor external signal cable; 5-displacement sensor; Detailed Implementation

[0016] An electronic measuring device for detecting the soldering length of pins includes a PCB fixing part 1-1 and a displacement measuring part 1-2. The PCB fixing part 1-1 is a cylinder; the displacement measuring part 1-2 is a hollow cylinder; a plurality of displacement sensors 5 are arranged axially inside the displacement measuring part 1-2; the PCB fixing part 1-1 and the displacement measuring part 1-2 are coaxial; the bottom surface of the PCB fixing part 1-1 is fixedly connected to the top surface of the displacement measuring part 1-2; a groove is provided on the top surface of the PCB fixing part 1-1; the bottom surface of the groove is a circuit board detection plane 1-3; a plurality of pin detection holes 1-3 are provided axially on the circuit board detection plane 1-3; the detection end of the displacement sensor 5 is coplanar with the circuit board detection plane; the output end of the displacement sensor 5 is connected to an external signal cable.

[0017] The output end of the displacement sensor 5 is provided with an axial fixing device 3; the axial fixing device 3 is a circular thin sheet; the surface of the axial fixing device 3 is provided with a plurality of sensor fixing and positioning holes 3-1; the output end of the displacement sensor 5 is embedded in the sensor fixing and positioning holes 3-1; the axial fixing device 3 ensures that multiple sensors are axially parallel, reduces resistance during axial movement, and facilitates fine adjustment of the axial displacement of the sensors.

[0018] The shape of the bottom surface of the groove matches the shape of the circuit board to be tested; the groove is used to fix the circuit board to be tested.

[0019] The bottom surface of the groove is circular;

[0020] The outer wall of the displacement measuring part 1-2 is provided with several radial fixing holes; the fixing holes are through holes; the fixing holes are evenly distributed along the axial direction of the outer wall of the displacement measuring part 1-2; fastening screws are installed in the fixing holes; the fastening screws fix the displacement sensor 5; the detection end of the displacement sensor 5 is located in the pin detection hole, the output end of the displacement sensor 5 is located in the fixing hole, and the fastening screws fix the displacement sensor 5 radially to ensure that the displacement sensor 5 and the axial direction of the displacement measuring part remain parallel;

[0021] The displacement sensor 5 is a spring-loaded pen-type displacement sensor.

[0022] The number of displacement sensors 5 is 4; the number of pin detection holes 1-3 is 4; the number of sensor fixing and positioning holes 3-1 is 4;

[0023] The number of fixing holes is 12;

[0024] like Figure 1-3 As shown, during use, the circuit board to be tested is fixed on the circuit board detection plane, and the pins of the test circuit board are inserted into the corresponding pin detection holes. The pins will press down on the displacement sensor 5. The displacement sensor 5 detects the displacement information of the press down and outputs the displacement information through the external signal cable of the sensor. The displacement information is the length of the pins of the circuit board to be tested.

Claims

1. An electronic measuring device for detecting the soldering length of a pin, characterized in that: The device includes a PCB fixing part, a displacement measuring part, a displacement sensor, and an axial fixing device. The PCB fixing part is a cylinder. The displacement measuring part is a hollow cylinder. The PCB fixing part and the displacement measuring part are coaxial. The bottom surface of the PCB fixing part is fixedly connected to the top surface of the displacement measuring part. A displacement sensor is axially arranged inside the displacement measuring part. A pin detection hole is provided on the top surface of the PCB fixing part. The pin detection hole is a through hole. The detection end of the displacement sensor is arranged inside the pin detection hole. The detection end of the displacement sensor is coplanar with the top surface of the PCB fixing part. An axial fixing device is provided at the output end of the displacement sensor. The axial fixing device is a circular thin sheet. The axial fixing device is coaxial with the displacement measuring part. A sensor fixing positioning hole is provided on the end face of the axial fixing device. The sensor fixing positioning hole is coaxial with the pin detection hole. The output end of the displacement sensor is embedded in the sensor fixing positioning hole. The output end of the displacement sensor is connected to an external signal cable. The coaxial sensor fixing positioning hole, pin detection hole, and displacement sensor form a detection mechanism.

2. The electronic measuring device for detecting the welding length of a pin according to claim 1, characterized in that: The outer wall of the displacement measuring part is provided with fixing holes evenly distributed along the axial direction; the fixing holes are through holes; fastening screws are installed in the fixing holes; the fastening screws fix the displacement sensor.

3. The electronic measuring device for detecting the soldering length of a pin according to claim 1, characterized in that: The top surface of the PCB fixing part is provided with a groove; the bottom surface of the groove is the circuit board detection plane; the detection end of the displacement sensor is coplanar with the circuit board detection plane; the groove is used to fix the circuit board to be tested.

4. The electronic measuring device for detecting the welding length of a pin according to claim 1, characterized in that: The number of testing institutions is greater than 1.

5. The electronic measuring device for detecting the soldering length of a pin according to claim 1, characterized in that: The displacement sensor is a spring-loaded pen-type displacement sensor.

6. The electronic measuring device for detecting the soldering length of a pin according to claim 3, characterized in that: The bottom surface of the groove is circular.

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