Circuit board testing direct pressure tooling

Abstract

The application discloses a circuit board test direct pressure tool, and relates to the field of electronic equipment test tools, which comprises a base body, the base body comprises a protective shell, a cover plate is hingedly arranged on the top of the protective shell, a test mechanism is movably arranged on the top of the cover plate, the test mechanism comprises a placing plate abutting against the cover plate, a plurality of groups of probes are fixedly and penetratingly arranged in the placing plate, a moving plate is movably arranged on the top of the placing plate, a supporting mechanism is fixedly arranged on the top of the cover plate, the supporting mechanism comprises a connecting plate fixedly connected with the top of the cover plate, a fixed plate is fixedly arranged on the top of the connecting plate, an installation plate is fixedly arranged on the top of the fixed plate, a fixing mechanism is fixedly arranged on the side of the installation plate, the fixing mechanism comprises an electric push rod, and a pressing plate is fixedly arranged on the output end of the electric push rod. The tool has compact structure and strong adaptability, and the whole set of test devices need not be replaced due to the change of circuit board models, so that the test efficiency and universality are remarkably improved.

Description

Technical Field

[0001] This application relates to the field of testing fixtures for electronic devices, and more particularly to a direct-voltage testing fixture for circuit boards. Background Technology

[0002] In the modern electronics manufacturing industry, circuit boards are core components of electronic products, and their performance testing is crucial. As electronic products become increasingly complex and their specifications become more refined, circuit board types are becoming more diverse, with significant differences in size, test point layout, and test parameters.

[0003] Currently, traditional circuit board testing fixtures typically use fixed testing mechanisms. These mechanisms are designed for specific types of circuit boards and have a fixed probe layout. When different types of circuit boards need to be tested, the fixed testing mechanism cannot adapt to the testing requirements of the new circuit board, so the entire testing fixture often needs to be replaced. This is not only costly but also cumbersome, resulting in a significant reduction in testing efficiency. Utility Model Content

[0004] To address the issues of cumbersome process and significantly reduced testing efficiency when replacing circuit boards of different models, this application provides a direct-pressure testing fixture for circuit boards.

[0005] The circuit board testing direct-voltage fixture provided in this application adopts the following technical solution:

[0006] A circuit board testing fixture includes a base body, the base body includes a protective shell, a cover plate is hinged to the top of the protective shell, a testing mechanism is movably provided on the top of the cover plate, the testing mechanism includes a placement plate that abuts against the cover plate, a plurality of probes are fixedly inserted inside the placement plate, and a movable plate is movably provided on the top of the placement plate;

[0007] A support mechanism is fixedly provided on the top of the cover plate. The support mechanism includes a connecting plate fixedly connected to the top of the cover plate. A fixing plate is fixedly provided on the top of the connecting plate. An mounting plate is fixedly provided on the top of the fixing plate. A fixing mechanism is fixedly provided on the side of the mounting plate. The fixing mechanism includes an electric push rod. A pressure plate is fixedly provided at the output end of the electric push rod.

[0008] By adopting the above technical solution, a stable driving force is provided by an electric actuator, and pressure is applied to the moving plate through a pressure plate to ensure uniform and controllable pressing force, thereby improving the accuracy of test results. The placement plate of the test mechanism is positioned and installed by the cooperation of the limiting post and the limiting groove of the cover plate, which facilitates the replacement of test mechanisms of different specifications.

[0009] Preferably, the cover plate has positioning grooves at the four corners, the bottom of the placement plate has positioning posts fixed at the four corners of the positioning grooves, and the top of the placement plate has limiting grooves at the four corners of the top.

[0010] By adopting the above technical solution, the cooperation between the limiting post and the limiting groove enables the precise positioning of the placement plate on the cover plate, preventing the placement plate from shifting during the test and ensuring the accurate positioning of the probe and the circuit board.

[0011] Preferably, a limiting rod is movably provided inside the limiting groove and fixedly connected to the bottom of the moving plate. A first spring is provided around the surface of the limiting rod and fixedly connected to the top of the placement plate and the bottom of the moving plate. A through groove for the probe to move is provided inside the moving plate.

[0012] By adopting the above technical solution, the elastic effect of the first spring enables the moving plate to automatically reset after the test.

[0013] Preferably, the bottom of both sides of the fixed plate is fixedly provided with support columns that can be moved through the pressure plate, and the surface of the support columns is surrounded by a second spring that is fixedly connected to the top of the cover plate and the bottom of the pressure plate.

[0014] By adopting the above technical solution, the support plate guides and supports the pressure plate, preventing the pressure plate from tilting during movement. The second spring further buffers the impact force in the pressing layer, making the pressing action of the pressure plate more stable and improving the stability of the tooling.

[0015] Preferably, the pressure plate has several sets of long grooves on its surface, and several sets of downward pressure rods are movably arranged inside each set of long grooves, with a threaded section at the top of each downward pressure rod.

[0016] By adopting the above technical solution, the long slot provides lateral movement space for the pressure rod, allowing the pressure rod to be adjusted according to different circuit board layouts, thus improving the versatility of the tooling.

[0017] Preferably, the threaded section surface is threadedly connected to a threaded sleeve that abuts against the top of the pressure plate, and the lower pressure rod surface is fixedly provided with a limiting disc that abuts against the bottom of the pressure plate.

[0018] By adopting the above technical solution, the threaded sleeve can firmly fix the lower pressure rod to the pressure plate, preventing the lower pressure rod from loosening during the test.

[0019] Preferably, the protective housing is provided with buckles on both sides for fixed connection with the cover plate.

[0020] By adopting the above technical solution, the buckle is used to fix the cover plate, ensuring that the cover plate will not be accidentally opened during the test.

[0021] Preferably, the protective housing is equipped with a display screen, a start button, and an emergency stop button, respectively, and a power interface for power supply is provided on the side of the protective housing.

[0022] By adopting the above technical solution, the start button and the emergency stop button can respectively start the test and stop the test in an emergency.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. By utilizing the interaction of structures such as the moving board, probes, and placement board, when it is necessary to switch the model of the test circuit board, the placement board and moving board corresponding to the model of the circuit board to be tested can be directly replaced. It can quickly replace circuit boards of different specifications and functions, easily cope with a variety of test scenarios, and does not require replacing the entire set of tooling due to changes in circuit board type, greatly improving the versatility and scope of use of the tooling.

[0025] 2. By utilizing the interplay of positioning slots, positioning posts, and placement plates, the placement plate can be quickly and accurately positioned on the cover plate, ensuring that the probes correspond to the test points on the circuit board, reducing manual alignment errors, and improving testing efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of this application;

[0027] Figure 2 This is a schematic diagram of the test mechanism and the explosion structure of the pressure plate in this application;

[0028] Figure 3 For the purposes of this application Figure 2 Enlarged structural diagram at point A in the middle;

[0029] Figure 4 This is a cross-sectional view of the threaded sleeve structure of this application.

[0030] Reference numerals: 1. Base body; 11. Protective shell; 12. Display screen; 13. Start button; 14. Emergency stop button; 15. Snap fastener; 16. Cover plate; 161. Positioning groove; 17. Power interface;

[0031] 3. Testing mechanism; 301. Placement plate; 302. Probe; 303. Positioning post; 304. Limiting groove; 305. Moving plate; 306. Limiting rod; 307. First spring; 308. Through groove;

[0032] 4. Support mechanism; 41. Fixing plate; 42. Connecting plate; 43. Support column; 44. Second spring; 45. Mounting plate;

[0033] 5. Fixing mechanism; 51. Electric actuator; 52. Pressure plate; 53. Long groove; 54. Lower pressure rod; 55. Threaded sleeve; 56. Threaded section; 57. Limiting plate. Detailed Implementation

[0034] The following is in conjunction with the appendix Figures 1-4 This application will be described in further detail.

[0035] This application discloses a direct-voltage testing fixture for circuit boards.

[0036] Reference Figure 1 A circuit board testing direct pressure fixture includes a base body 1, the base body 1 includes a protective shell 11, the top of the protective shell 11 is connected to a cover plate 16 by a hinge, the top of the cover plate 16 is symmetrically provided with a testing mechanism 3, the protective shell 11 is fixedly installed with buckles 15 on both sides, the buckles 15 are locked to the cover plate 16, the surface of the protective shell 11 is integrated with a display screen 12, a start button 13 and an emergency stop button 14, the display screen 12, the start button 13 and the emergency stop button 14 are all electrically connected to the testing module inside the protective shell 11, and a power interface 17 for power supply is opened in the middle of the side of the protective shell 11.

[0037] The cover plate 16 is hinged to the protective housing 11, allowing the cover plate 16 to be opened and closed for easy placement and removal of the test module. It also provides a mounting support surface for the test mechanism 3. The buckle 15 is used to lock the cover plate 16 and the protective housing 11, ensuring the stability of the fixture when closed and preventing the cover plate 16 from loosening during the test. The display screen 12 can display the test parameters, status and results of the circuit board for easy monitoring by the operator. The start button 13 is used to trigger the start of the test process. The emergency stop button 14 can quickly interrupt the test in an emergency to ensure safety. The power interface 17 provides power input to the test module, display screen 12 and other structures inside the fixture. The display screen 12 is a touch-sensitive LCD screen.

[0038] Reference Figure 2 , Figure 3The testing mechanism 3 includes a placement plate 301. Two sets of placement plates 301 abut against the surface of a cover plate 16. The cover plate 16 has a hollow structure. The bottom of the placement plate 301 has a protrusion located inside the cover plate 16. Several sets of probes 302, arranged according to the test points of different circuit boards, are fixedly embedded inside the placement plate 301, and the probes 302 penetrate vertically through the placement plate 301. Positioning grooves 161 are opened at the four corners of the surface of the cover plate 16, and the positioning grooves 161 penetrate the cover plate 16. Positioning posts 303 are fixed at the bottom of the placement plate 301 at positions corresponding to the positioning grooves 161. The positioning posts 303 can be inserted into the positioning grooves 161 to achieve positioning. Limiting grooves 304 are opened at the four corners of the top of the placement plate 301. Inside the placement plate 301, regardless of the placement plate 301, a limiting rod 306 is movably installed inside the limiting groove 304. The top of the limiting rod 306 is fixedly connected to the bottom of the moving plate 305. A first spring 307 is sleeved on the surface of the limiting rod 306. The two ends of the first spring 307 are fixed to the top of the placement plate 301 and the bottom of the moving plate 305, respectively. The length of the limiting rod 306 is 5 mm longer than the fully stretched length of the first spring 307, so there will be no problem of the limiting rod 306 falling off. Several sets of through grooves 308 of different shapes are opened inside the moving plate 305. The shape of each set of through grooves 308 corresponds to the layout of the bottom probe 302. Each set of through grooves 308 allows the probe 302 to move in the vertical direction.

[0039] The bottom protrusion of the placement board 301 mates with the internal structure of the cover plate 16 to ensure stable installation of the placement board 301. The probe 302, which penetrates vertically through the placement board 301, is the core testing component. It transmits and tests electrical signals by contacting the test pads and pins on the circuit board. The lower end of the probe 302 has a pin segment that connects to the electrical interface of the test module inside the protective housing 11 via a ribbon cable. The positioning post 303 is inserted into the positioning slot 161 to ensure precise positioning of the placement board 301 on the cover plate 16, preventing misalignment of the probe 302 with the test points on the circuit board, ensuring testing accuracy, and allowing for movement. The plate 305 is connected to the placement plate 301 via the limiting rod 306 and can move up and down along the limiting rod 306. When the moving plate 305 is pressed down, the probe 302 protrudes from the through groove 308 and contacts the test point on the circuit board. The first spring 307 provides elastic pressure. When the moving plate 305 is pressed down, the first spring 307 is compressed to generate elastic force. After the test is completed, the moving plate 305 automatically rebounds through the first spring 307, so that the probe 302 is located in the through groove 308 to avoid accidental damage. Both the placement plate 301 and the moving plate 305 are epoxy resin boards, which have good insulation performance and mechanical strength.

[0040] Reference Figure 2A support mechanism 4 is fixedly provided on one side of the top of the cover plate 16. The support mechanism 4 includes a connecting plate 42, which is fixedly connected to one side of the top of the cover plate 16. The top of the connecting plate 42 is fixedly connected to one side of the fixing plate 41. An mounting plate 45 is fixedly provided on the top of the fixing plate 41. Support columns 43 are fixedly provided on the bottom of both sides of the fixing plate 41. The support columns 43 movably pass through the pressure plate 52. A second spring 44 is sleeved on the surface of the support column 43 at the position from the bottom of the support column 43 to the bottom of the pressure plate 52. The two ends of the second spring 44 are fixed to the top of the cover plate 16 and the bottom of the pressure plate 52, respectively.

[0041] The connecting plate 42 and the fixing plate 41 are fixed to the top of the cover plate 16, providing a support base for the mounting plate 45 and the electric push rod 51, ensuring the installation stability of the entire fixing mechanism 5. The support column 43 passes through the pressure plate 52, restricting the pressure plate 52 to move only in the vertical direction to avoid displacement. The second spring 44 is sleeved on the surface of the support column 43 to provide a buffering effect. When the pressure plate 52 drives the lower pressure rod 54 to press down, the second spring 44 can absorb part of the impact force to prevent the circuit board from being damaged by rigid pressing. At the same time, the elastic force of the second spring 44 can assist the pressure plate 52 to reset, improving the flexibility of the mechanism.

[0042] Reference Figure 2 , Figure 4 A fixing mechanism 5 is fixedly provided on the side of the mounting plate 45. The fixing mechanism 5 includes an electric push rod 51. The output end of the electric push rod 51 is fixedly connected to the middle of the pressure plate 52. Several sets of transverse long grooves 53 are opened on the surface of the pressure plate 52. At least two sets of downward pressing rods 54 are movably arranged inside each set of long grooves 53. The top of the downward pressing rod 54 is provided with a threaded section 56. The surface of the threaded section 56 is threadedly connected to the threaded sleeve 55. The threaded sleeve 55 abuts against the top of the pressure plate 52. A limiting plate 57 is fixedly provided on the top of the downward pressing rod 54. The limiting plate 57 abuts against the bottom of the pressure plate 52 to form an axial limit.

[0043] The electric actuator 51 drives the pressure plate 52 to move up and down through the extension and retraction of the output shaft, thereby pressing down and fixing or releasing the circuit board. The electric actuator 51 is controlled by a PLC and is started by the start button 13. The electric actuator 51 is model HY01. The long slot 53 is elongated, allowing the pressing rod 54 to adjust its lateral position inside the long slot 53 to adapt to different circuit board layouts and improve the versatility of the tooling. The threaded section 56 at the top of the pressing rod 54 cooperates with the threaded sleeve 55. After adjusting the position of the pressing rod 54 inside the long slot 53, the position of the pressing rod 54 is fixed by rotating the threaded sleeve 55. The limiting plate 57 abuts against the bottom of the pressure plate 52 to prevent the pressing rod 54 from falling off, while ensuring the stable movement of the pressing rod 54 within the long slot 53. Multiple sets of pressing rods 54 can be evenly distributed above the circuit board. By adjusting the position of each pressing rod 54, uniform pressure is applied to the circuit board, avoiding excessive local force that could lead to deformation.

[0044] The implementation principle of the circuit board testing direct pressure fixture in this application embodiment is as follows: During testing, firstly, the cover plate 16 is opened by the buckle 15, the test module is placed inside the protective housing 11 and connected to the power interface 17, then the test mechanism 3 corresponding to the circuit board to be tested is placed on the cover plate 16, and the electrical connector integrated with the probe 302 is connected to the test module. Then, the circuit board to be tested is placed on the surface of the moving plate 305, and the electric push rod 51 is activated. Its output end pushes the pressure plate 52 downward. During the downward movement of the pressure plate 52, the second spring 44 on the surface of the support column 43 is compressed, providing a buffering effect to prevent the pressure plate 52 from causing rigid impact damage to the circuit board. At the same time, the downward pressure rod 54 on the pressure plate 52 can be adjusted to the position on the circuit board to adapt to different models of circuit boards. The moving plate 305 is pressed by the pressure plate 52. Under the action of force, it moves downward, compressing the first spring 307, so that the probe 302 extends through the through slot 308 and contacts the test point of the circuit board. After the probe 302 is connected to the circuit board, the signal is transmitted through the circuit system in the protective housing 11, and the circuit board is tested by the test module. The display screen 12 displays the test data in real time. If an abnormality occurs during the test, the action can be stopped immediately by the emergency stop button 14 to ensure the safety of the equipment and the circuit board. After the test is completed, the electric push rod 51 retracts and drives the pressure plate 52 to reset. The moving plate 305 is lifted under the action of the first spring 307, and the probe 302 is separated from the circuit board. The cover plate 16 can be opened to take out the circuit board. When it is necessary to test other types of circuit boards, the cover plate 16 is opened, the test module is replaced, and then the test mechanism 3 required for the circuit board to be tested is replaced, and the test can be started.

[0045] The above are merely optional embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A circuit board testing direct-voltage fixture, characterized in that: It includes a base body (1), the base body (1) includes a protective shell (11), the top of the protective shell (11) is hinged to a cover plate (16), and the top of the cover plate (16) is movably provided with a testing mechanism (3). The testing mechanism (3) includes a placement plate (301) that abuts against the cover plate (16), and a number of probes (302) are fixedly inserted inside the placement plate (301). A movable plate (305) is movably provided on the top of the placement plate (301). The top of the cover plate (16) is fixed with a support mechanism (4); The support mechanism (4) includes a connecting plate (42) fixedly connected to the top of the cover plate (16). A fixing plate (41) is fixedly provided on the top of the connecting plate (42). An mounting plate (45) is fixedly provided on the top of the fixing plate (41). A fixing mechanism (5) is fixedly provided on the side of the mounting plate (45). The fixing mechanism (5) includes an electric push rod (51). A pressure plate (52) is fixedly provided at the output end of the electric push rod (51).

2. The circuit board testing direct-voltage fixture according to claim 1, characterized in that: The cover plate (16) has positioning grooves (161) at the four corners of its surface, and the placement plate (301) has positioning posts (303) fixed at the four corners of its bottom, located inside the positioning grooves (161). The placement plate (301) has limiting grooves (304) at the four corners of its top.

3. The circuit board testing direct-voltage fixture according to claim 2, characterized in that: The limiting groove (304) is movably provided with a limiting rod (306) fixedly connected to the bottom of the moving plate (305). The surface of the limiting rod (306) is surrounded by a first spring (307) fixedly connected to the top of the placement plate (301) and the bottom of the moving plate (305). The moving plate (305) is provided with a through groove (308) for the probe (302) to move.

4. The circuit board testing direct-voltage fixture according to claim 1, characterized in that: The bottom of both sides of the fixed plate (41) is fixed with support columns (43) that can be moved through the pressure plate (52). The surface of the support column (43) is surrounded by a second spring (44) that is fixedly connected to the top of the cover plate (16) and the bottom of the pressure plate (52).

5. The circuit board testing direct-voltage fixture according to claim 1, characterized in that: The pressure plate (52) has several sets of long grooves (53) on its surface. Each set of long grooves (53) has several sets of downward pressure rods (54) inside it. The top of the downward pressure rods (54) has a threaded section (56).

6. The circuit board testing direct-voltage fixture according to claim 5, characterized in that: The threaded section (56) is threadedly connected to a threaded sleeve (55) that abuts against the top of the pressure plate (52), and the lower pressure rod (54) is fixedly provided with a limiting plate (57) that abuts against the bottom of the pressure plate (52).

7. The circuit board testing direct-voltage fixture according to claim 1, characterized in that: The protective housing (11) is fixedly provided with buckles (15) on both sides, which are fixedly connected to the cover plate (16).

8. The circuit board testing direct-voltage fixture according to claim 1, characterized in that: The protective housing (11) is fixed with a display screen (12), a start button (13) and an emergency stop button (14) respectively. A power interface (17) for power supply is opened on the side of the protective housing (11).

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