A test tool for PCB

Abstract

The utility model discloses a kind of test tool of PCB printed circuit board, it is related to circuit board detection technical field, including test tool, the test tool includes test machine body, support, air cylinder, thimble plate and jig, the support fixedly connected in the rear side of test machine body top, the air cylinder is fixedly installed in the front side of support, the thimble plate is set in the bottom of air cylinder, the jig is movably connected in the top of test machine body. The utility model is changed mechanism and pull locking mechanism by setting, can make changed mechanism realized the quick disassembly of thimble plate, so that when facing different models of circuit board, the thimble plate of adapted can be conveniently replaced, it is solved due to lack of replacement structure, when needing to test different models of circuit board, due to the position of thimble on thimble plate, quantity etc. New circuit board cannot be adapted, leading to same test tool difficultly compatible multiple models of circuit board detection, thereby reducing the adaptability problem of test tool.

Description

Technical Field

[0001] This utility model relates to the field of circuit board testing technology, specifically a testing fixture for PCB printed circuit boards. Background Technology

[0002] Printed circuit boards (PCBs) provide electrical connections for electronic components, and PCB testing fixtures are used for inspection during the manufacturing process.

[0003] According to announcement number CN219369932U, a printed circuit board testing fixture is disclosed, including a body and a heat dissipation device. A support is mounted on the surface of the body, and a cylinder is fixedly connected to the surface of the support. A pin plate is fixedly connected to the output end of the cylinder. A fixture is mounted on the surface of the body. The heat dissipation device is mounted on the surface of the body and includes a fan. An air inlet pipe is fixedly connected to the input end of the fan, and a duct is fixedly connected to the output end of the fan. Two hollow rods are fixedly connected to the surface of the body. This invention, by setting up a heat dissipation device, facilitates heat dissipation of the equipment, effectively reducing the heat generated between the pins and the circuit board during circuit board testing. This reduces the risk of damage to the pins and circuit board during prolonged testing, thus shortening the equipment's lifespan and improving the overall stability of the equipment.

[0004] Based on the search of the above patents and the discovery of the equipment in the prior art, although the above equipment can solve the problem of heat generation after the contact between the ejector pin and the circuit board surface, causing the ejector pin and the circuit board to overheat, it will cause damage to the equipment and the circuit board during long-term testing, resulting in a short lifespan. In turn, the equipment is prone to generating heat during the testing process, causing the ejector pin and the circuit board in the equipment to be damaged by heat. However, during use, due to the lack of a replacement structure, when different models of circuit boards need to be tested, the position and number of the ejector pins on the ejector plate cannot be adapted to the new circuit boards, making it difficult for the same test fixture to be compatible with the testing of multiple models of circuit boards, thus reducing the adaptability of the test fixture. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a test fixture for PCB printed circuit boards, which has the advantage of easy replacement. It solves the problem that due to the lack of a replacement structure, when different models of circuit boards need to be tested, the position and number of the ejector pins on the ejector plate cannot be adapted to the new circuit board, resulting in the same test fixture being unable to be compatible with the testing of multiple models of circuit boards, thus reducing the adaptability of the test fixture.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a testing fixture for PCB printed circuit boards, comprising a testing body, a support, a cylinder, a ejector plate, and a jig. The support is fixedly connected to the rear side of the top of the testing body, the cylinder is fixedly installed on the front side of the support, the ejector plate is disposed at the bottom of the cylinder, and the jig is movably connected to the top of the testing body. A replacement mechanism includes a connecting frame fixedly connected to the output end of the cylinder. A connecting seat is fixedly installed at the bottom of the connecting frame, and a replacement seat is movably connected to the inner wall of the connecting seat. The bottom of the replacement seat is fixedly connected to the top of the ejector plate. Locking components are provided on both sides of the top of the connecting seat, and limit components are fixedly connected to both sides of the replacement seat. Pull-locking mechanism; the pull-locking mechanism is fixedly installed on the top of the connecting seat.

[0007] As a preferred embodiment of this utility model, the moving groove of the locking component is opened on both sides of the top of the connecting seat, and the inner wall of the moving groove is movably connected with a locking plate. Both sides of the replacement seat are provided with locking slots, the inner side of the locking plate is movably connected to the inner wall of the locking slot, and auxiliary components are movably embedded on both the front and rear sides of the locking plate.

[0008] As a preferred embodiment of this utility model, the auxiliary component includes a ball bearing, which is movably embedded on both sides of the front and rear sides of the locking plate. The inner walls of the moving groove are provided with auxiliary grooves on both sides of the front and rear sides, and the surface of the ball bearing is movably connected to the inner wall of the auxiliary groove.

[0009] As a preferred embodiment of this utility model, the limiting component includes a limiting block, which is fixedly installed on both sides of the replacement seat. Limiting grooves are provided on both sides of the bottom of the connecting seat, and the top of the limiting block is movably connected to the inner wall of the limiting groove.

[0010] As a preferred embodiment of this utility model, the pull locking mechanism includes a forward and reverse motor, which is fixedly installed on the top of the connecting seat. The output end of the forward and reverse motor is fixedly connected to a winding wheel. Pull ropes are provided on both sides of the winding wheel. One end of the pull rope is fixedly connected to both sides of the surface of the winding wheel, and the other end of the pull rope is fixedly connected to the inner side of the locking plate. A tensioning component is provided on the outer side of the locking plate.

[0011] In a preferred embodiment of this utility model, the tensioning assembly includes a tension spring, which is disposed on the outer side of the locking plate. Grooves are provided on both sides of the inner wall of the connecting frame. One end of the tension spring is fixedly connected to the inner wall of the groove, and the other end of the tension spring is fixedly installed on the outer side of the locking plate.

[0012] As a preferred embodiment of this utility model, a guide rod is fixedly connected to the inner wall of the groove, the tension spring is sleeved on the surface of the guide rod, and the inner side of the guide rod extends through to the inner side of the locking plate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting a replacement mechanism and a pull-locking mechanism, enables the quick disassembly and assembly of the ejector plate, allowing for convenient replacement of the appropriate ejector plate when facing different types of circuit boards. At the same time, the pull-locking mechanism can effectively control the locking state of the replacement mechanism, solving the problem that due to the lack of a replacement structure, when testing different types of circuit boards, the position and number of ejector pins on the ejector plate cannot be adapted to the new circuit board, making it difficult for the same test fixture to be compatible with the testing of multiple types of circuit boards, thus reducing the compatibility problem of the test fixture and achieving the effect of easy replacement.

[0014] 2. This utility model, by setting a replacement mechanism and using a detachable connection structure between the connecting seat and the replacement seat, enables the rapid separation and installation of the ejector plate and the cylinder output end. When different models of PCB printed circuit boards need to be tested, there is no need to adjust the entire test fixture. Only the matching ejector plate needs to be replaced to meet the testing requirements of different circuit boards, greatly improving the compatibility of the same test fixture with multiple models of PCB printed circuit boards.

[0015] 3. This utility model, by setting a tensioning and locking mechanism, uses a forward and reverse motor to control the winding wheel to pull the rope, which can quickly realize the insertion and removal of the locking plate, significantly shortening the replacement time of the ejector plate and improving the detection efficiency. Furthermore, the force of the tension spring pulls the locking plate to move outward, thereby improving the replacement efficiency of the ejector plate. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the three-dimensional structure of the connecting frame; Figure 3 A schematic diagram of the exploded three-dimensional structure for replacing the seat; Figure 4 This is a three-dimensional cross-sectional view of the connector.

[0017] In the diagram: 1. Test fixture; 11. Test body; 12. Support; 13. Cylinder; 14. Ejector plate; 15. Fixture; 2. Replacement mechanism; 21. Connecting frame; 22. Connecting seat; 23. Replacement seat; 24. Locking assembly; 241. Moving slot; 242. Locking insert plate; 243. Locking slot; 244. Auxiliary component; 2441. Ball bearing; 2442. Auxiliary slot; 25. Limiting assembly; 251. Limiting block; 252. Limiting slot; 3. Pull-locking mechanism; 31. Forward and reverse motor; 32. Rewinding wheel; 33. Pull rope; 34. Tensioning assembly; 341. Tension spring; 342. Groove; 4. Guide rod. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] Example 1 Reference Figure 1-4 This is the first embodiment of the present invention, providing a testing fixture for a PCB printed circuit board, including a testing fixture 1. The testing fixture 1 includes a testing body 11, a support 12, a cylinder 13, a ejector plate 14, and a jig 15. The support 12 is fixedly connected to the rear side of the top of the testing body 11, the cylinder 13 is fixedly installed on the front side of the support 12, the ejector plate 14 is disposed at the bottom of the cylinder 13, and the jig 15 is movably connected to the top of the testing body 11. Replacement mechanism 2; Replacement mechanism 2 includes a connecting frame 21, which is fixedly connected to the output end of cylinder 13. A connecting seat 22 is fixedly installed at the bottom of the connecting frame 21. A replacement seat 23 is movably connected to the inner wall of the connecting seat 22. The bottom of the replacement seat 23 is fixedly connected to the top of the ejector plate 14. Locking components 24 are provided on both sides of the top of the connecting seat 22. Limit components 25 are fixedly connected to both sides of the replacement seat 23. Pull the locking mechanism 3; the locking mechanism 3 is fixedly installed on the top of the connecting seat 22. The locking component 24 moves the groove 241. The groove 241 is opened on both sides of the top of the connecting seat 22. The inner wall of the groove 241 is movably connected to the locking plate 242. The changing seat 23 has locking slots 243 on both sides. The inner side of the locking plate 242 is movably connected to the inner wall of the locking slot 243. The front and rear sides of the locking plate 242 are movably inlaid with auxiliary components 244. The auxiliary components 244 include... The device includes a ball bearing 2441, which is movably embedded in the front and rear sides of the locking plate 242. The inner wall of the moving groove 241 has auxiliary grooves 2442 on both the front and rear sides. The surface of the ball bearing 2441 is movably connected to the inner wall of the auxiliary groove 2442. The limiting component 25 includes a limiting block 251, which is fixedly installed on both sides of the changing seat 23. The bottom of the connecting seat 22 has limiting grooves 252 on both sides. The top of the limiting block 251 is movably connected to the inner wall of the limiting groove 252.

[0023] Specifically, the detachable connection structure between the connector 22 and the replacement connector 23 enables the rapid separation and installation of the ejector plate 14 and the output end of the cylinder 13. When different models of PCB printed circuit boards need to be tested, there is no need to adjust the entire test fixture 1. Only the matching ejector plate 14 needs to be replaced to meet the testing requirements of different circuit boards, which greatly improves the compatibility of the same test fixture 1 with multiple models of PCB printed circuit boards.

[0024] Furthermore, when it is necessary to replace the ejector plate 14, first start the forward and reverse motor 31 to rotate it in the forward direction, driving the take-up wheel 32 to rotate synchronously. Then, loosen the pull rope 33 and cause the tension spring 341 to pull the locking plate 242 outward until it is completely disengaged from the locking slots 243 on both sides of the replacement seat 23, thus releasing the locking state. Then, remove the old ejector plate 14 along with the replacement seat 23. During installation, move the ejector plate 14 adapted to the new PCB printed circuit board, along with the replacement seat 23, below the connecting seat 22, so that the limiting blocks 251 on both sides of the replacement seat 23 align with the limiting grooves 252 at the bottom of the connecting seat 22, allowing the limiting blocks 251 to slide along the inner wall of the limiting grooves 252. The device moves and embeds itself, ensuring that the replacement seat 23 and the connecting seat 22 are precisely aligned. At this time, the locking slot 243 and the locking plate 242 are automatically aligned. Then, the forward and reverse motors 31 rotate in opposite directions to tighten the pull rope 33, so that the locking plate 242 overcomes the force of the tension spring 341 and is inserted into the locking slot 243. During the unlocking process, the ball 2441 rolls in the auxiliary groove 2442, converting sliding friction into rolling friction, making the movement of the locking socket smoother and avoiding the locking plate 242 from getting stuck. This achieves quick replacement, precise positioning and stable connection of the ejector plate 14, improving the compatibility and testing efficiency of different models of PCB printed circuit boards.

[0025] Example 2 In the second embodiment of this utility model, the pull locking mechanism 3 includes a forward and reverse motor 31, which is fixedly installed on the top of the connecting seat 22. The output end of the forward and reverse motor 31 is fixedly connected to a winding wheel 32. Pull ropes 33 are provided on both sides of the winding wheel 32. One end of the pull rope 33 is fixedly connected to both sides of the surface of the winding wheel 32, and the other end of the pull rope 33 is fixedly connected to the inner side of the locking plate 242. A tension assembly 34 is provided on the outer side of the locking plate 242. The tension assembly 34 includes a tension spring 341, which is provided on the outer side of the locking plate 242. Grooves 342 are provided on both sides of the inner wall of the connecting frame 21. One end of the tension spring 341 is fixedly connected to the inner wall of the groove 342, and the other end of the tension spring 341 is fixedly installed on the outer side of the locking plate 242. A guide rod 4 is fixedly connected to the inner wall of the groove 342. The tension spring 341 is sleeved on the surface of the guide rod 4, and the inner side of the guide rod 4 extends through to the inner side of the locking plate 242.

[0026] Specifically, by controlling the take-up wheel 32 to pull the pull rope 33 through the forward and reverse motor 31, the insertion and removal of the locking plate 242 can be quickly realized, which significantly shortens the replacement time of the ejector plate 14 and improves the detection efficiency. Furthermore, the locking plate 242 is pulled outward by the force of the tension spring 341, thereby improving the replacement efficiency of the ejector plate 14.

[0027] Furthermore, when the ejector plate 14 needs to be replaced, the forward and reverse motor 31 rotates in the forward direction, driving the take-up wheel 32 to rotate synchronously. The take-up wheel 32 loosens the pull rope 33, causing the telescopic spring to pull the locking plate 242 to move outward along the guide rod 4. At this time, the telescopic spring 341 is compressed and stores elastic potential energy. After the locking plate 242 completely disengages from the locking slot 243 of the replacement seat 23, the locking state is released, and the old ejector plate 14 can be removed. When installing the new ejector plate 14, align the replacement seat 23 with the connecting seat 22, and the forward and reverse motor 31 rotates in the reverse direction. Rotate the tension rope 33 to pull the locking insert 242 inward along the guide rod 4 and insert it into the locking slot 243. During this process, the guide rod 4 passes through the locking insert 242 and is fixed to the inner wall of the groove 342, guiding the locking insert 242 to move linearly along the axial direction, preventing it from tilting or getting stuck. At the same time, it provides rigid support for the locking insert 242, enhances structural stability, and also prevents the tension spring 341 from twisting or bending during the extension and retraction process, protecting the tension spring 341 and extending its service life.

[0028] Working principle: When testing different models of PCB printed circuit boards and replacing the appropriate ejector plate 14 is required, first start the forward and reverse motor 31 to rotate forward. The output end of the forward and reverse motor 31 drives the take-up wheel 32 to rotate synchronously. During the rotation of the take-up wheel 32, the pull ropes 33 on both sides are released. At this time, the tension spring 341 on the outside of the locking plate 242 is no longer constrained by the tension of the pull rope 33. It pulls the locking plate 242 outward by its own elastic restoring force. When the locking plate 242 moves, the balls 2441 embedded on its front and rear sides roll in the auxiliary groove 2442 on the inner wall of the moving groove 241, converting sliding friction into rolling friction, making the movement of the locking plate 242 smoother, until the locking plate 242 is completely disengaged from the locking slots 243 on both sides of the replacement seat 23, releasing the lock on the replacement seat 23. After the lock is released, the old ejector plate 14 and the replacement seat 23 can be removed from the inner wall of the connecting seat 22. Then, install the new appropriate ejector plate 14. When fitting the ejector plate 14, align the replacement seat 23 on the top of the new ejector plate 14 with the inner wall of the connecting seat 22, and align the limiting blocks 251 on both sides of the replacement seat 23 with the limiting grooves 252 at the bottom of the connecting seat 22. Then push the replacement seat 23 upward, and the limiting blocks 251 slide along the inner wall of the limiting grooves 252 and embed into them, achieving precise positioning of the replacement seat 23 and the connecting seat 22. At this time, the locking slots 243 on both sides of the replacement seat 23 correspond to the locking inserts 242 on the connecting seat 22. Then control the forward and reverse motors 31 to rotate in opposite directions. The forward and reverse motors 31 drive the winding wheel 32 to rotate in opposite directions. The winding wheel 32 tightens the pull ropes 33 on both sides. The pull ropes 33 pull the locking inserts 242 to move inward against the elastic force of the tension spring 341. Under the guidance of the guide rod 4, the locking inserts 242 are stably inserted into the locking slots 243 on both sides of the replacement seat 23, completing the locking of the replacement seat 23, and thus achieving the fixed installation of the new ejector plate 14.

[0029] In summary: By setting up the replacement mechanism 2 and the pull-locking mechanism 3, the replacement mechanism 2 enables the quick installation and removal of the ejector plate 14, allowing for convenient replacement of the appropriate ejector plate 14 when dealing with different types of circuit boards. At the same time, the pull-locking mechanism 3 can effectively control the locking state of the replacement mechanism 2. Due to the lack of a replacement structure, when different types of circuit boards need to be tested, the position and number of ejector pins on the ejector plate cannot be adapted to the new circuit board, making it difficult for the same test fixture to be compatible with the testing of multiple types of circuit boards, thus reducing the adaptability of the test fixture.

[0030] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0031] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0032] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A testing fixture for a PCB (Printed Circuit Board), characterized in that: The test fixture (1) includes a test body (11), a support (12), a cylinder (13), an ejector plate (14), and a jig (15). The support (12) is fixedly connected to the rear side of the top of the test body (11), the cylinder (13) is fixedly installed on the front side of the support (12), the ejector plate (14) is located at the bottom of the cylinder (13), and the jig (15) is movably connected to the top of the test body (11). Replacement mechanism (2); The replacement mechanism (2) includes a connecting frame (21), which is fixedly connected to the output end of the cylinder (13). A connecting seat (22) is fixedly installed at the bottom of the connecting frame (21). A replacement seat (23) is movably connected to the inner wall of the connecting seat (22). The bottom of the replacement seat (23) is fixedly connected to the top of the ejector plate (14). Locking components (24) are provided on both sides of the top of the connecting seat (22). Limiting components (25) are fixedly connected to both sides of the replacement seat (23). Pull-locking mechanism (3); the pull-locking mechanism (3) is fixedly installed on the top of the connecting seat (22).

2. The PCB printed circuit board testing fixture according to claim 1, characterized in that: The locking component (24) has a moving groove (241) on both sides of the top of the connecting seat (22). The inner wall of the moving groove (241) is movably connected to a locking plate (242). The two sides of the replacement seat (23) are provided with locking slots (243). The inner side of the locking plate (242) is movably connected to the inner wall of the locking slot (243). The front and rear sides of the locking plate (242) are movably inlaid with auxiliary components (244).

3. The PCB printed circuit board testing fixture according to claim 2, characterized in that: The auxiliary component (244) includes a ball bearing (2441), which is movably embedded in the front and rear sides of the locking plate (242). The inner walls of the moving groove (241) are provided with auxiliary grooves (2442) on both the front and rear sides. The surface of the ball bearing (2441) is movably connected to the inner wall of the auxiliary groove (2442).

4. The PCB printed circuit board testing fixture according to claim 1, characterized in that: The limiting component (25) includes a limiting block (251), which is fixedly installed on both sides of the replacement seat (23). Limiting grooves (252) are provided on both sides of the bottom of the connecting seat (22). The top of the limiting block (251) is movably connected to the inner wall of the limiting groove (252).

5. The PCB printed circuit board testing fixture according to claim 2, characterized in that: The pull locking mechanism (3) includes a forward and reverse motor (31), which is fixedly installed on the top of the connecting seat (22). The output end of the forward and reverse motor (31) is fixedly connected to a winding wheel (32). Pull ropes (33) are provided on both sides of the winding wheel (32). One end of the pull rope (33) is fixedly connected to both sides of the surface of the winding wheel (32), and the other end of the pull rope (33) is fixedly connected to the inner side of the locking plate (242). A tensioning component (34) is provided on the outer side of the locking plate (242).

6. The PCB printed circuit board testing fixture according to claim 5, characterized in that: The tensioning assembly (34) includes a tension spring (341), which is disposed on the outside of the locking plate (242). Grooves (342) are provided on both sides of the inner wall of the connecting frame (21). One end of the tension spring (341) is fixedly connected to the inner wall of the groove (342), and the other end of the tension spring (341) is fixedly installed on the outside of the locking plate (242).

7. The PCB printed circuit board testing fixture according to claim 6, characterized in that: The inner wall of the groove (342) is fixedly connected to a guide rod (4), and the tension spring (341) is sleeved on the surface of the guide rod (4). The inner side of the guide rod (4) extends through to the inner side of the locking plate (242).

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