PCBA testing device with good protection effect
By introducing self-test lifting components into PCBA testing equipment, the testing of circuit boards of different thicknesses and the protection of uneven circuit boards is achieved, which solves the problem that traditional equipment cannot adapt to circuit boards of different thicknesses and is prone to damage, and improves the practicality and accuracy of the test.
Patent Information
- Application Number
- CN202323501004.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-21
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2033-12-21
AI Technical Summary
The solid pressure mechanism of the traditional PCBA testing equipment is a fixed structure and cannot adapt to circuit boards of different thicknesses. Moreover, the circuit board is not placed flat and easily damaged the surface of the circuit board.
A PCBA testing device including self-test lifting components is designed. The circuit board condition is detected through self-test sensors, and the self-test motor controls the rotation of the screw, drives the lifting and lowering of the pressing table and the pressure pipe, so as to achieve the testing of circuit boards of different thicknesses and prevent damage to uneven circuit boards.
The device can self-check the condition of the circuit board, avoid damage caused by pressure, and adapt to circuit boards of different thicknesses, improving the practicality and accuracy of the test.
Smart Images
Figure CN222653074U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PCBA testing, in particular to a PCBA testing device with good protection effect. Background Art
[0002] Programmable chip PCBA, called mounted circuit board in Chinese, means that the blank PCB goes through the entire process of SMT mounting and DIP plug-in. In the mass production process of PCBA, due to various possible factors of equipment and operators, it is impossible to guarantee that all the produced PCBAs are intact, making the testing of PCBA boards an indispensable process in the field of electronic manufacturing.
[0003] When testing with current PCBA testing equipment, the circuit board is first placed in a fixture, and pressure is applied to the surface of the circuit board through a pressure-applying mechanism in the equipment, so that the contacts under the circuit board are in contact with the contacts on the surface of the fixture, thereby achieving testing. However, the pressure-applying mechanism in traditional PCBA testing equipment is generally a fixed structure. If the circuit board in the fixture is not placed flat, direct pressure can easily cause damage to the surface of the circuit board, and it is also impossible to test circuit boards of different thicknesses, so it is not very practical.
[0004] Therefore, a PCBA testing device with good protection effect is proposed. Utility Model Content
[0005] The purpose of the utility model is to provide a PCBA testing device with good protection effect to solve the problems raised in the above background technology.
[0006] A PCBA testing device with good protection effect comprises a support plate, a fixed platform, a fixture platform, a pressing platform, and a self-inspection lifting component. The fixed platform is installed on the support plate, the fixture platform and the self-inspection lifting component are installed on the fixed platform, the fixture platform is used to place a jig, the self-inspection lifting component is connected to the pressing platform, the self-inspection lifting component comprises a self-inspection sensor, a self-inspection motor and a lifting mechanism, the self-inspection sensor is used to detect the actual condition of the circuit board, the self-inspection motor is used to control the operation of the lifting mechanism components, the lifting mechanism is used to control the lifting of the pressing platform, and a plurality of pressure tubes are provided on the lower surface of the pressing platform, and the pressure tubes are used to apply pressure to the circuit board.
[0007] In order to reasonably install various parts and mechanisms, the fixed platform includes a lower base plate, a vertical plate and an upper base plate. The two ends of the vertical plate are respectively connected to one end of the upper base plate and the lower base plate. The lower base plate is parallel to the upper base plate, and the vertical plate is perpendicular to the upper base plate and the lower base plate.
[0008] In order to realize the automatic lifting of the pressing table, the self-inspection lifting assembly includes a cylinder, a fixed block, a connecting block, a sliding block, and a limit assembly. The cylinder is installed on the upper base plate, and the floating joint of the cylinder is connected to the connecting block, and the connecting block is connected to the sliding block. A sliding groove is provided inside the sliding block, and a screw is movably connected in the sliding groove. After the self-inspection sensor detects the actual situation of the circuit board, it sends a signal, and the self-inspection motor drives the screw to rotate, thereby driving the pressing table to descend; the cylinder is used to lock the entire lifting mechanism. When the lifting mechanism does not need to move, the cylinder pulls the connecting block to prevent it from moving due to gravity.
[0009] The front end face of the sliding block is provided with a long through hole connected to the sliding groove along the screw trajectory, the lower end face of the sliding block is provided with a through hole connected to the sliding groove, the lower end of the screw is connected to the output end of the self-test motor, and the limit assembly is used to limit the movement trajectory of the cylinder floating joint.
[0010] In order to prevent the pressing table from shaking during the lifting and lowering process, the limit assembly includes a limit block and a slider. The limit block is installed on the vertical plate, the slider and the limit block are movably matched, and the connecting block is fixedly connected to the slider.
[0011] In order to achieve sliding cooperation between the slider and the limit block, a long limit groove is provided in the limit block, the extension direction of the limit groove is consistent with the movement direction of the cylinder, the slider is slidably connected in the limit groove, and the limit block is equivalent to a track.
[0012] In order to be able to work normally when the ambient light is insufficient and to facilitate the operation of the staff, the upper base plate is provided with a plurality of lamp holders, and the lamp bodies are arranged in the lamp holders.
[0013] In order to reduce the impact force of downward pressure, multiple buffer structures are provided under the clamp table. The buffer structures include a limit cylinder, a buffer spring, and a sliding cylinder. The sliding cylinder is installed at the bottom of the clamp table. The sliding cylinder is slidably connected in the limit cylinder. The buffer spring is located between the lower bottom surface of the sliding cylinder and the bottom surface of the sliding cylinder.
[0014] In order to adapt to different specifications of fixtures, the fixture table is a split structure, the fixture table includes a left fixture table and a right fixture table, the sliding cylinder is respectively installed on the bottom surface of the left fixture table and the right fixture table, the fixture table is connected to the adjustment mechanism, the adjustment mechanism is used to adjust the distance between the left fixture table and the right fixture table, the adjustment mechanism support table, drive motor, at least two bidirectional screw rods, thread block;
[0015] The upper end surface of the support platform is provided with at least two parallel sliding through holes, and the bidirectional screw rod is rotatably connected in the sliding through hole. A driving wheel is provided at the same end of multiple bidirectional screw rods, and transmission is realized between two adjacent driving wheels through a gear chain. The driving motor is used to drive one of the driving wheels. The threaded block is threadedly connected to the outer side wall of the bidirectional screw rod and is slidably connected in the sliding through hole. The sliding through hole is used to limit the rotation of the threaded block, and the threaded block is connected to the bottom of the limit cylinder.
[0016] In order to prevent the pressing platform from shaking when it is lifted or lowered, a plurality of limit rods are movably provided on the pressing platform, and one end of the limit rod is fixedly connected to the lower bottom plate of the fixed platform.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] 1. The utility model can drive the screw to rotate through the self-inspection motor in the self-inspection lifting assembly, thereby driving the fixed block to move up and down along the inner wall of the sliding groove, and driving the pressing table and the pressing tube to move together. While moving, the self-inspection sensor starts to self-inspect the surface of the circuit board in the fixture to determine whether pressure can be applied, thereby preventing the problem of damage to the circuit board due to pressure applied when the circuit board in the fixture is not placed flat. By adjusting the height of the pressing tube, it is also convenient to test circuit boards of different thicknesses, thereby improving the practicality of the device.
[0019] 2. When testing different types of circuit boards, it is necessary to replace matching fixtures, and the fixtures are often disassembled and prone to loosening, thus affecting the later test results. When replacing, we control the drive motor to rotate, drive the active wheel to rotate together, and drive the active wheels and bidirectional screws on both sides to rotate together through the gear chain. While rotating, the two threaded blocks are driven to move along the inner wall of the sliding through hole, thereby driving the fixture table to move together. While moving, the fixture can be fixed or disassembled, which is convenient for replacement, thereby improving the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a side structural schematic diagram of the utility model;
[0021] Figure 2 This is a schematic diagram of the cross-sectional connection structure of the fixture table, support table, and bidirectional screw rod of the utility model;
[0022] Figure 3 for Figure 2 A magnified image of point A;
[0023] Figure 4 It is a three-dimensional structural schematic diagram of the utility model.
[0024] In the figure: 1. support plate; 2. fixed table; 3. cylinder; 4. connecting block; 5. sliding block; 6. sliding groove; 7. screw; 8. fixed block; 9. self-test motor; 10. pressing table; 11. self-test sensor; 12. limit block; 13. limit groove; 14. slider; 15. limit cylinder; 16. buffer spring; 17. sliding cylinder; 18. fixture table; 19. pressing tube; 20. limit rod; 21. bidirectional screw; 22. supporting table; 23. threaded block; 24. driving wheel; 25. gear chain; 26. driving motor; 27. lamp body. DETAILED DESCRIPTION
[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0026] like Figure 1-4 As shown, support plate 1, fixed platform 2, cylinder 3, connecting block 4, sliding block 5, sliding groove 6, screw 7, fixed block 8, self-test motor 9, pressing platform 10, self-test sensor 11, limit block 12, limit groove 13, slider 14, limit cylinder 15, buffer spring 16, sliding cylinder 17, fixture platform 18, pressing tube 19, limit rod 20, bidirectional screw 21, support platform 22, threaded block 23, driving wheel 24, gear chain 25, drive motor 26, lamp body 27;
[0027] Embodiment 1: The utility model provides a technical solution: a PCBA test device with good protection effect. The solid pressure mechanism in the traditional PCBA test equipment is generally a fixed structure. If the circuit board in the fixture is not placed flat, direct pressure can easily damage the surface of the circuit board, and it is impossible to test circuit boards of different thicknesses.
[0028] It includes two support plates 1; a fixed platform 2 is installed on the upper surfaces of the two support plates 1; a cylinder 3 is installed above the inner wall of the fixed platform 2; a connecting block 4 is installed on the output end of the cylinder 3; a sliding block 5 is installed on the front side surface of the connecting block 4; a sliding groove 6 is opened on the front side surface of the sliding block 5; a self-checking lifting component is arranged inside the sliding groove 6,
[0029] A limiting assembly is provided on the rear side of the inner wall of the support plate 1, and a plurality of limiting cylinders 15 are installed below the inner wall of the fixed platform 2. Buffer springs 16 are installed below the inner walls of the plurality of limiting cylinders 15, and a sliding cylinder 17 is installed on the upper ends of the plurality of buffer springs 16. A fixture platform 18 is installed on the upper ends of a corresponding group of sliding cylinders 17. A fixture is provided on the inner walls of the two fixture platforms 18, and the plurality of sliding cylinders 17 are slidably installed on the inner walls of the corresponding limiting cylinders 15, respectively.
[0030] The self-inspection lifting assembly includes a screw rod 7, which is rotatably mounted on the inner wall of the sliding groove 6, a fixing block 8 is threadedly mounted on the rod wall of the screw rod 7, a pressing platform 10 is mounted on the front surface of the fixing block 8, a plurality of pressing tubes 19 are arranged on the inner wall of the pressing platform 10, a self-inspection sensor 11 is arranged on the lower surface of the pressing platform 10, and the lower end of the screw rod 7 passes through the lower part of the inner wall of the sliding groove 6 and is mounted with a self-inspection motor 9.
[0031] The limiting assembly includes a limiting block 12, the rear side surface of the limiting block 12 is fixed to the rear side of the inner wall of the fixing platform 2, the front side surface of the limiting block 12 is provided with a limiting groove 13, the inner wall of the limiting groove 13 is slidably mounted with a slider 14, and the front side surface of the slider 14 is fixed to the rear side surface of the connecting block 4.
[0032] The screw rod 7 is driven to rotate by the self-inspection motor 9 in the self-inspection lifting assembly, thereby driving the fixed block 8 to move up and down along the inner wall of the sliding groove 6, and driving the pressing platform 10 and the pressing tube 19 to move together. While moving, the self-inspection sensor 11 is cooperated to start self-inspection of the surface of the circuit board in the fixture to determine whether pressure can be applied, thereby preventing the problem of damage to the circuit board due to pressure applied when the circuit board in the fixture is not placed flat. By adjusting the height of the pressing tube 19, it is also convenient to test circuit boards of different thicknesses, thereby improving the practicality of the device.
[0033] The working principle is as follows: in order to enhance the protection effect of PCBA circuit board testing and make the test operation more automated, the circuit board is first placed inside the fixture table 18 during testing. At this time, the pressing table 10 and the pressing tube 19 are in the initial position. Then, the distance between the contact on the circuit board and the lower end of the pressing tube 19 is detected by controlling the self-test sensor 11 to calculate. At the same time, the self-test motor 9 is controlled to start rotating, thereby driving the screw rod 7 to rotate together. At the same time, the fixed block 8 is driven to move up and down along the rod wall of the screw rod 7, thereby driving the pressing table 10 and the pressing tube 19 to start together. While moving, the self-test sensor 11 is used to start the circuit board surface. The contact starts to self-check the height, so as to prevent the problem that the pressing table 10 and the pressing tube 19 may damage the surface of the circuit board during the pressing process due to the circuit board not being placed flat during the placement process. At the same time, in the process of pressing and fixing, the circuit board is pressed by the pressing tube 19, so as to push the sliding cylinder 17 to press the buffer spring 16 for contraction and buffering, so as to prevent direct pressing from causing damage to the circuit board. While pressing down, the moving position of the sliding cylinder 17 is limited by the limiting cylinder 15, so that the position of the sliding cylinder 17 will not shift during the movement, thereby improving the stability of pressing the circuit board, thereby improving the production quality of the product.
[0034] Embodiment 2:
[0035] When testing different types of circuit boards, it is necessary to replace matching fixtures, and fixtures are often disassembled and easily loosened, thus affecting the subsequent test results.
[0036] A support platform 22 is installed below the inner wall of the fixed platform 2, and two sliding through holes are provided on the upper surface of the support platform 22. Two bidirectional screw rods 21 are rotatably installed on the inner wall of the support platform 22. The right ends of the two bidirectional screw rods 21 are both installed with driving wheels 24, and the two driving wheels 24 are rotatably connected together through a gear chain 25. A driving motor 26 is installed on the right side surface of the rear driving wheel 24. Two threaded blocks 23 are threadedly installed on the rod walls of the two bidirectional screw rods 21. The lower ends of a corresponding group of limit cylinders 15 are respectively fixed to the upper surfaces of the corresponding threaded blocks 23, and the two threaded blocks 23 are respectively slidably installed on the inner walls of the corresponding sliding through holes. When replacing, the driving motor 26 is controlled to rotate to drive the driving wheel 24 to rotate together, and the gear chain 25 drives the driving wheels 24 and the bidirectional screw rods 21 on both sides to rotate together. While rotating, the two threaded blocks 23 are driven to move along the inner wall of the sliding through hole, thereby driving the fixture table 18 to move together, and the fixture is fixed or disassembled while moving, which is convenient for replacement, thereby improving the working efficiency of the equipment.
[0037] Two through holes are provided on the upper surface of the pressing platform 10, and the inner walls of the two through holes are slidably installed with limit rods 20. The lower ends of the two limit rods 20 are fixed to the lower part of the inner wall of the fixing platform 2. The limit rods 20 are used to limit the up and down movement position of the pressing platform 10, thereby further improving the stability during pressure application and improving the accuracy of the test results. A lamp holder is provided above the inner wall of the fixing platform 2, and a plurality of lamp bodies 27 are provided inside the lamp holder. By providing a plurality of lamp bodies 27, it is convenient to work in a dimly lit environment.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A PCBA testing device with good protection effect, characterized in that: It includes a support plate, a fixed platform, a fixture platform, a pressing platform, and a self-inspection lifting component. The fixed platform is installed on the support plate, the fixture platform and the self-inspection lifting component are installed on the fixed platform, the fixture platform is used to place the fixture, and the self-inspection lifting component is connected to the pressing platform. The self-inspection lifting assembly includes a self-inspection sensor, a self-inspection motor and a lifting mechanism. The self-inspection sensor is used to detect the actual condition of the circuit board, the self-inspection motor is used to control the operation of the lifting mechanism components, and the lifting mechanism is used to control the lifting of the pressing platform. The lower surface of the pressing platform is provided with multiple pressing tubes, and the pressing tubes are used to apply pressure to the circuit board.
2. A PCBA testing device with good protection effect according to claim 1, characterized in that: The fixed platform comprises a lower base plate, a vertical plate and an upper base plate, the two ends of the vertical plate are respectively connected to one end of the upper base plate and the lower base plate, the lower base plate is parallel to the upper base plate, and the vertical plate is perpendicular to the upper base plate and the lower base plate.
3. A PCBA testing device with good protection effect according to claim 2, characterized in that: The self-test lifting assembly includes a cylinder, a fixed block, a connecting block, a sliding block, and a limit assembly. The cylinder is installed on the upper base plate. The floating joint of the cylinder is connected to the connecting block. The connecting block is connected to the sliding block. A sliding groove is provided inside the sliding block. A screw is movably connected in the sliding groove. The front end face of the sliding block is provided with a long through hole connected to the sliding groove along the screw trajectory, the lower end face of the sliding block is provided with a through hole connected to the sliding groove, the lower end of the screw is connected to the output end of the self-test motor, and the limit assembly is used to limit the movement trajectory of the cylinder floating joint.
4. A PCBA testing device with good protection effect according to claim 3, characterized in that: The limiting assembly comprises a limiting block and a sliding block. The limiting block is installed on the vertical plate. The sliding block is movably matched with the limiting block. The connecting block is fixedly connected with the sliding block.
5. A PCBA testing device with good protection effect according to claim 4, characterized in that: A long limiting groove is arranged in the limiting block, the extending direction of the limiting groove is consistent with the moving direction of the cylinder, and the sliding block is slidably connected in the limiting groove.
6. A PCBA testing device with good protection effect according to claim 2, characterized in that: The upper base plate is provided with a plurality of lamp holders, and the lamp bodies are arranged inside the lamp holders.
7. A PCBA testing device with good protection effect according to claim 1, characterized in that: A plurality of buffer structures are provided under the clamp table, and the buffer structures include a limiting cylinder, a buffer spring, and a sliding cylinder. The sliding cylinder is installed at the bottom of the clamp table, and the sliding cylinder is slidably connected in the limiting cylinder. The buffer spring is located between the lower bottom surface of the sliding cylinder and the bottom surface of the sliding cylinder.
8. A PCBA testing device with good protection effect according to claim 7, characterized in that: The fixture table is a split structure, the fixture table includes a left fixture table and a right fixture table, the sliding cylinder is respectively installed on the bottom surface of the left fixture table and the right fixture table, the fixture table is connected to the adjustment mechanism, the adjustment mechanism is used to adjust the distance between the left fixture table and the right fixture table, and the adjustment mechanism includes a support table, a drive motor, at least two bidirectional screw rods, and a threaded block; The upper end surface of the support platform is provided with at least two parallel sliding through holes, the bidirectional screw rod is rotatably connected in the sliding through hole, the same end of the multiple bidirectional screw rods is provided with a driving wheel, and the transmission is realized between two adjacent driving wheels through a gear chain. The driving motor is used to drive one of the driving wheels, the threaded block is threadedly connected to the outer side wall of the bidirectional screw rod and is slidably connected in the sliding through hole, the sliding through hole is used to limit the rotation of the threaded block, and the threaded block is connected to the bottom of the limit cylinder.
9. A PCBA testing device with good protection effect according to claim 2, characterized in that: A plurality of limit rods are movably provided on the pressing platform, and one end of the limit rod is fixedly connected to the lower bottom plate of the fixing platform.