Test pressure plate with automatic lifting function for circuit board test tool
By designing a circuit board test plate with automatic lifting and quick replacement functions, the problems of inaccurate circuit board test results and low production efficiency were solved, achieving efficient and accurate circuit board testing and production continuity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-31
AI Technical Summary
The existing test plates cannot adapt to the differences in test point layout, size and thickness of different circuit boards, resulting in inaccurate test results. Moreover, replacing the test plates requires machine downtime, which affects production efficiency.
A test plate for circuit board testing fixture with automatic lifting function was designed. The test plate is driven to lift and lower by a pneumatic push rod, and the test plate can be quickly replaced by a spring and a blocking plate structure to ensure that the probes are in close contact with the circuit board and accurate testing is achieved.
It enables efficient testing of different circuit boards on the same equipment, ensuring the accuracy of test data and production continuity, and avoiding the trouble of poor contact caused by manual operation and equipment downtime to replace pressure plates.
Smart Images
Figure CN224066856U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of circuit board technology, and in particular to a test pressure plate for circuit board testing fixtures with automatic lifting function. Background Technology
[0002] A circuit board is composed of integrated circuits, quartz oscillators, trimmer capacitors, and printed circuit boards. Circuit boards are also known as ceramic circuit boards, alumina ceramic circuit boards, and aluminum nitride ceramic circuit boards. Circuit boards make circuits miniaturized and more intuitive, and play an important role in the mass production of fixed circuits and the optimization of electrical appliance layout. In electronic devices, they are mainly used to connect various electronic components and also serve as structural support components.
[0003] In existing circuit board testing, test pressure plates are usually used to test the circuit boards. However, existing test pressure plates are usually not replaceable. Different circuit boards have different test point layouts, sizes, thicknesses, etc., and a matching pressure plate is required to ensure the accuracy of the test. There may be situations where the pressure plate and the circuit board are incompatible, which will affect the accuracy of the test results. Therefore, this solution proposes a test pressure plate for circuit board testing fixtures with automatic lifting function to solve the above problems. Utility Model Content
[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a test pressure plate for circuit board testing fixtures with automatic lifting function, which can solve the problems in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a test pressure plate for a circuit board testing fixture with automatic lifting function, comprising a base, a rubber pad inside the base, a positioning post fixedly connected to the top of the base, a circuit board on the top of the base, a groove on the circuit board that matches the positioning post, the groove on the circuit board being slidably connected to the surface of the positioning post, a fixing post fixedly installed on one side of the base, a top plate fixedly connected to the top of the fixing post, a pneumatic push rod fixedly installed on the surface of the top plate, and a lower pressure block fixedly connected to the output end of the pneumatic push rod, the lower pressure block being I-shaped.
[0006] Preferably, a sliding rod is slidably connected to the surface of the top plate, and a first spring is movably sleeved on the surface of the sliding rod, with the two ends of the first spring fixed to the top of the sliding rod and the surface of the top plate, respectively.
[0007] Preferably, a fixing plate is fixedly connected to the other end of the sliding rod.
[0008] Preferably, the fixing plate has a pressure plate groove.
[0009] Preferably, a detection pressure plate is slidably connected inside the pressure plate groove.
[0010] Preferably, a detection probe is provided at the bottom of the detection plate.
[0011] Preferably, a limiting block is fixedly connected to the top of the fixing plate, and a blocking plate is slidably connected inside the limiting block, with one side of the blocking plate being sloped.
[0012] Preferably, a second spring is fixedly connected to the side of the barrier plate away from the slope, the other end of the second spring is fixedly connected to the inside of the limiting block, a sliding column groove is provided on the top of the limiting block, and a sliding column is fixedly connected to the top of the barrier plate.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] (1) The test pressure plate of the circuit board test fixture with automatic lifting function will squeeze the circuit board when the test probe contacts the circuit board. Therefore, the circuit board will transfer the squeezing force to the rubber pad when it is squeezed, which can cause the circuit board to break due to excessive pressure during the test. The lifting function of the test pressure plate can accurately control the contact process between the test pressure plate and the base, so that the test probe can fit tightly with the test point on the circuit board with appropriate pressure. This avoids poor contact caused by uneven pressure or inaccurate pressing position, and ensures that each test point can be stably connected, thereby obtaining accurate and reliable test data.
[0015] (2) The test plate of the circuit board test fixture with automatic lifting function presses the test plate into the inside of the plate slot. When the test plate enters the inside of the plate slot, the blocking plate loses the squeezing force and disengages from the inside of the limiting block under the reset of the first spring to fix and limit the test plate. Quickly changing the corresponding test plate allows the test process to be switched quickly, so that the production line does not stop or only pauses briefly, thereby ensuring the production progress. Different circuit boards can be tested efficiently on the same test equipment without the need to configure a complete set of test equipment for each circuit board. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0017] Figure 1 This is a schematic diagram of the structure of a test pressure plate for a circuit board testing fixture with automatic lifting function according to this utility model;
[0018] Figure 2 This is a partial structural cross-sectional view of a test pressure plate for a circuit board testing fixture with automatic lifting function according to this utility model;
[0019] Figure 3This is a partial structural cross-sectional view of a test pressure plate for a circuit board testing fixture with automatic lifting function according to this utility model;
[0020] Figure 4 This is a circular view of a test pressure plate for a circuit board testing fixture with an automatic lifting function according to this utility model;
[0021] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle.
[0022] Reference numerals: 1. Base; 2. Circuit board; 3. Positioning post; 4. Rubber pad; 5. Fixing post; 6. Top plate; 7. Pneumatic push rod; 8. Sliding rod; 9. First spring; 10. Lower pressure block; 11. Fixing plate; 12. Detection pressure plate; 13. Detection probe; 14. Pressure plate groove; 15. Limiting block; 16. Sliding column groove; 17. Blocking plate; 18. Sliding column; 19. Second spring. Detailed Implementation
[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0024] Please see Figure 1-5 This utility model provides a technical solution: a test pressure plate for a circuit board testing fixture with automatic lifting function, including a base 1, a rubber pad 4 inside the base 1, a positioning post 3 fixedly connected to the top of the base 1, a circuit board 2 on the top of the base 1, a groove on the circuit board 2 that matches the positioning post 3, the groove on the circuit board 2 slidably connected to the surface of the positioning post 3, a fixing post 5 fixedly installed on one side of the base 1, a top plate 6 fixedly connected to the top of the fixing post 5, and a pneumatic push rod 7 fixedly installed on the surface of the top plate 6. The output end of the pneumatic push rod 7 is fixedly connected to a lower pressure block 10. The lower pressure block 10 is I-shaped and the bottom of the lower pressure block 10 is made of rubber. A sliding rod 8 is slidably connected to the surface of the top plate 6. A first spring 9 is movably sleeved on the surface of the sliding rod 8. The two ends of the first spring 9 are fixed to the top of the sliding rod 8 and the surface of the top plate 6, respectively. A fixing plate 11 is fixedly connected to the other end of the sliding rod 8. A pressure plate groove 14 is opened on the fixing plate 11. A detection pressure plate 12 is slidably connected inside the pressure plate groove 14. A detection probe 13 is set at the bottom of the detection pressure plate 12.
[0025] When testing the circuit board, the untested circuit board 2 is placed on the surface of the rubber pad 4, and the groove on the circuit board 2 is aligned with the positioning post 3 to secure it. The corresponding test plate 12 is placed inside the pressure plate groove 14. The pneumatic push rod 7 is then activated, causing its output end to move the lower pressure block 10, which in turn pushes the fixing plate 11. As the lower pressure block 10 pushes the fixing plate 11, it causes the sliding rod 8 to slide on the top plate 6, thus compressing the first spring 9 and causing it to contract. The fixing plate 11 then lowers the test plate 12, causing the test probe to... The probe 13 contacts the circuit board 2, thus enabling the probe 13 to test the circuit board 2. When the probe 13 contacts the circuit board 2, it will squeeze the circuit board 2. Therefore, the circuit board 2 will be squeezed and the squeezing force will be transferred to the rubber pad 4. This can cause the circuit board 2 to break due to excessive pressure during testing. The lifting function of the detection plate 12 can precisely control the contact process between the detection plate 12 and the base 1, so that the probe 13 can fit tightly with the test point on the circuit board 2 with appropriate pressure. This avoids poor contact caused by uneven pressure or inaccurate pressing position, ensuring that each test point can be stably connected, thereby obtaining accurate and reliable test data.
[0026] A limiting block 15 is fixedly connected to the top of the fixed plate 11. A blocking plate 17 is slidably connected inside the limiting block 15. One side of the blocking plate 17 is sloping. The detection pressure plate 12 presses and connects the sloping surface of the blocking plate 17. A second spring 19 is fixedly connected to the side of the blocking plate 17 away from the sloping side. The other end of the second spring 19 is fixedly connected inside the limiting block 15. A sliding column groove 16 is opened on the top of the limiting block 15. A sliding column 18 is fixedly connected to the top of the blocking plate 17. The sliding column 18 is slidably connected to the inner surface of the sliding column groove 16.
[0027] When testing different models of circuit boards 2, the corresponding testing pressure plate 12 needs to be used. At this time, pulling the sliding column 18 causes the blocking plate 17 to slide into the limiting block 15. When the blocking plate 17 moves into the limiting block 15, it exerts a squeezing force on the second spring 19, causing it to deform and contract. When the blocking plate 17 enters the limiting block 15, the blocking plate 17 no longer blocks the testing pressure plate 12 inside the pressure plate groove 14, thus allowing the testing pressure plate 12 to be removed. Then, the corresponding model of testing pressure plate 12 is aligned with the pressure plate groove 14 and pressed down. The inclined surface of the blocking plate 17 is squeezed. The pressure plate retracts into the limiting block 15, thereby pressing the detection plate 12 into the pressure plate groove 14. When the detection plate 12 enters the pressure plate groove 14, the blocking plate 17 loses its squeezing force and disengages from the limiting block 15 under the reset of the first spring 9, fixing and restricting the detection plate 12. Quickly replacing the corresponding detection plate 12 allows for rapid switching of the testing process, ensuring that the production line does not stop or only pauses briefly, thus guaranteeing production progress. Different circuit boards 2 can be tested efficiently on the same testing equipment without the need to configure a complete testing equipment for each type of circuit board 2.
[0028] Working principle:
[0029] When testing the circuit board, the untested circuit board 2 is placed on the surface of the rubber pad 4, and the groove on the circuit board 2 is aligned with the positioning post 3 to secure it. The testing pressure plate 12, corresponding to the circuit board 2 model, is placed inside the pressure plate groove 14. At this time, the pneumatic push rod 7 is activated, causing its output end to move the lower pressure block 10, which in turn pushes the fixing plate 11. As the lower pressure block 10 pushes the fixing plate 11, it causes the sliding rod 8 to slide on the top plate 6, thereby compressing the first spring 9 and causing it to contract. 1. The detection plate 12 is lowered, and when the detection plate 12 is lowered, the detection probe 13 comes into contact with the circuit board 2, so that the detection probe 13 detects the circuit board 2. When the detection probe 13 comes into contact with the circuit board 2, it will squeeze the circuit board 2. Therefore, the circuit board 2 is squeezed and the squeezing force will be transmitted to the rubber pad 4. This can cause the circuit board 2 to break due to excessive pressure during detection. The lifting function of the detection plate 12 can precisely control the contact process between the detection plate 12 and the base 1, so that the detection probe 13 can fit tightly with the test point on the circuit board 2 with appropriate pressure.
[0030] When testing different models of circuit boards 2, the corresponding testing pressure plate 12 needs to be used. At this time, the sliding column 18 is pulled to drive the blocking plate 17 to slide into the limiting block 15. When the blocking plate 17 moves into the limiting block 15, it exerts a squeezing force on the second spring 19, causing it to deform and contract. When the blocking plate 17 enters the limiting block 15, the blocking plate 17 no longer blocks the testing pressure plate 12 inside the pressure plate groove 14, so the testing pressure plate 12 can be taken out. Then, the testing pressure plate 12 of the corresponding model is aligned with the pressure plate groove 14 and pressed. The inclined surface of the blocking plate 17 is squeezed and contracts into the limiting block 15, so that the testing pressure plate 12 can be pressed into the pressure plate groove 14. When the testing pressure plate 12 enters the pressure plate groove 14, the blocking plate 17 loses the squeezing force and is released from the limiting block 15 under the reset of the first spring 9, fixing and limiting the testing pressure plate 12.
[0031] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A test presser plate for a circuit board test tool having an automatic lifting function, comprising a base (1), characterized in that: The inside of the base (1) is provided with a rubber pad (4), the top of the base (1) is fixedly connected with a positioning column (3), the top of the base (1) is provided with a circuit board (2), the circuit board (2) is provided with a groove matched with the positioning column (3), the groove on the circuit board (2) is slidingly connected on the surface of the positioning column (3), one side of the base (1) is fixedly installed with a fixed column (5), the top of the fixed column (5) is fixedly connected with a top plate (6), the surface of the top plate (6) is fixedly installed with a pneumatic push rod (7), the output end of the pneumatic push rod (7) is fixedly connected with a down pressing block (10), and the down pressing block (10) is in the shape of an I-shaped beam.
2. The test presser plate with automatic lifting function for the test tooling of the circuit board according to claim 1, characterized in that: The surface of the top plate (6) is slidingly connected with a sliding rod (8), the surface of the sliding rod (8) is movably sleeved with a first spring (9), and the two ends of the first spring (9) are fixed on the top of the sliding rod (8) and the surface of the top plate (6) respectively.
3. The test presser plate with automatic lifting function for the test tooling of the circuit board according to claim 2, characterized in that: The other end of the sliding rod (8) is fixedly connected with a fixed plate (11).
4. The test presser plate with automatic lifting function for the test tooling of the circuit board according to claim 3, characterized in that: The fixed plate (11) is provided with a pressing plate groove (14).
5. The test presser plate with automatic lifting function for the test tooling of the circuit board according to claim 4, characterized in that: The inside of the pressing plate groove (14) is slidingly connected with a detection pressing plate (12).
6. The test presser plate with automatic lifting function for the test tooling of the circuit board according to claim 5, characterized in that: The bottom of the detection pressing plate (12) is provided with a detection probe (13).
7. The test presser plate with automatic lifting function for a circuit board test tooling according to claim 6, characterized in that: The top of the fixed plate (11) is fixedly connected with a limiting block (15), the inside of the limiting block (15) is slidingly connected with a blocking plate (17), and one side of the blocking plate (17) is in the shape of an inclined plane.
8. The test presser plate with automatic lifting function for a circuit board test tooling according to claim 7, characterized in that: The side, away from the inclined plane, of the blocking plate (17) is fixedly connected with a second spring (19), the other end of the second spring (19) is fixedly connected in the inside of the limiting block (15), the top of the limiting block (15) is provided with a sliding column groove (16), and the top of the blocking plate (17) is fixedly connected with a sliding column (18).