A waterproof test fixture

Abstract

The application relates to the technical field of waterproof test fixtures, and discloses a waterproof test fixture which comprises a base and a cover plate which are mutually inserted, at least one to-be-tested station is arranged on the base, a sealing cavity is formed in the base at the to-be-tested station, and a ventilation hole which is in communication with the sealing cavity is arranged on the base; the test fixture further comprises a test plate which covers the opening of the sealing cavity, a test hole which is in communication with the sealing cavity is formed in the test plate, a mounting hole which is arranged opposite to the sealing cavity is formed in the cover plate, and the mounting hole is used for inserting a to-be-tested waterproof and breathable film and covering the test hole; the to-be-tested waterproof and breathable film is inserted into the mounting hole of the cover plate and accurately covers the test hole of the test plate, the standardization, modularization, alignment and sealing between the measured film material and the test hole are realized, the same base can be quickly adapted to waterproof and breathable films of various models, sizes and mounting modes by replacing cover plates of different specifications, and the universality and reusability of the fixture are remarkably improved.

Description

Technical Field

[0001] This application relates to the technical field of waterproof testing fixtures, and in particular to a waterproof testing fixture. Background Technology

[0002] With the increasing demands for waterproof performance in industries such as consumer electronics and automotive electronics, waterproof and breathable membranes, as a key functional material, are widely used in products such as smartphones, automotive lighting, smart wearable devices, and industrial sensors. These membranes must effectively block moisture intrusion while ensuring the balance of air pressure inside and outside the equipment. Their quality and reliability are directly related to the lifespan and safety of the entire product. Therefore, conducting efficient and accurate waterproof testing on waterproof and breathable membranes before they leave the factory has become an indispensable part of the production process.

[0003] Currently, the testing methods commonly used in the industry are mostly dedicated testing methods with one membrane and one fixture. That is, for waterproof and breathable membranes of a specific model, size or installation location, a dedicated test fixture is customized and developed. This type of fixture usually consists of a base and a cover plate. The base is equipped with a test air passage and a sealing cavity. The membrane material to be tested is fixed in the test position by pressing the cover plate, and then a certain pressure of gas or liquid is introduced to test its sealing performance.

[0004] However, with the rapid pace of product iteration, especially with the numerous and frequent updates of products such as automotive lighting, and the lack of universality and modular design of fixtures, which cannot adapt to membrane materials of different sizes or installation structures, the efficiency of production line changeover is low, which seriously affects the testing rhythm and production efficiency. Summary of the Invention

[0005] To ensure that waterproof testing fixtures can be quickly adapted to different specifications of waterproof and breathable membranes by replacing standardized modules, covering most mainstream product models and reducing the cost of repeated fixture procurement due to product iterations, a waterproof testing fixture is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution: A waterproof testing fixture includes a base and a cover plate that are interlocked. The base has at least one test station, and a sealed cavity and a vent hole communicating with the sealed cavity are formed at the test station. The fixture also includes a test plate covering the opening of the sealed cavity, the test plate having a test hole communicating with the sealed cavity, and the cover plate having an installation hole opposite to the sealed cavity, the installation hole for inserting and covering the waterproof and breathable membrane to be tested.

[0007] By adopting the above technical solution, the waterproof and breathable membrane to be tested is inserted through the mounting hole on the cover plate and precisely covers the test hole on the test plate. This achieves standardized and modular alignment and sealing between the membrane material to be tested and the test hole. It also allows the same base to be quickly adapted to various models, sizes and installation methods of waterproof and breathable membranes by changing the cover plate of different specifications, which significantly improves the versatility and reusability of the fixture.

[0008] Preferably, the base is provided with a support portion that protrudes towards the cover plate at the opening edge of the sealed cavity, and the support portion abuts against the test plate.

[0009] By adopting the above technical solution, the support part, as a rigid force transmission medium, can accurately concentrate and distribute the force generated when the cover plate is locked to the perimeter of the effective sealing area on the back of the test plate. This avoids the locking force being dispersed to other non-critical or weak areas of the base, and forms a tight and stable surface contact between the test plate and the upper surface of the support part. This enhances the static sealing reliability of the interface between the support part and the test plate, and reduces the risk of leakage of test gas or liquid in the sealed cavity due to poor sealing of the interface.

[0010] Preferably, the support portion has a first sealing groove on the side facing the test plate, and a first sealing ring that abuts against the test plate is provided in the first sealing groove.

[0011] By adopting the above technical solution, the first sealing ring can effectively compensate for the micro-unevenness of the contact surface between the test plate and the support, block the test gas or test liquid that may leak from the interface, completely isolate the sealed cavity from the external environment, and ensure that all the test gas or test liquid introduced is used to test the performance of the waterproof and breathable membrane itself, without leaking from the body seam of the fixture, thus further ensuring the absolute accuracy of the test data.

[0012] Preferably, the side of the cover plate facing the base abuts against the test plate, and the side of the cover plate facing the base has a second sealing groove, and the second sealing groove is provided with a second sealing ring that abuts against the test plate.

[0013] By adopting the above technical solution, the second sealing ring is responsible for sealing the surrounding area of ​​the membrane material being tested. The clamping force of the second sealing ring acts on the test plate, ensuring that the sealing force is evenly distributed around the effective test area of ​​the membrane material, accurately forming a closed ring, and completely eliminating the hidden danger of edge leakage.

[0014] Preferably, the cover plate has a positioning hole in the vertical direction, and the base has a positioning post inserted into the positioning hole on the side facing the cover plate.

[0015] By adopting the above technical solution, during the process of closing the cover plate, the cooperation between the positioning post and the positioning hole can first achieve the initial alignment of the cover plate and the base, guiding the operator to place the cover plate quickly and accurately, avoiding the waterproof and breathable membrane to be tested from not being able to align with the test hole due to offset or misalignment, thus improving operational efficiency and safety.

[0016] Preferably, the cover plate has a limiting hole in the middle along the vertical direction, and the base has a limiting post on the side facing the cover plate that is inserted into the limiting hole.

[0017] By adopting the above technical solution, the limiting post and limiting hole in the middle provide higher precision final positioning, ensuring that the mounting hole on the cover plate and the test plate / test hole on the base are in the same concentric position, ensuring the consistency of each fastening, fundamentally eliminating the test error caused by assembly deviation, and suitable for high-precision automated testing scenarios.

[0018] Preferably, the limiting post and the base are detachably connected.

[0019] By adopting the above technical solution, when testing a different product specification, if the positioning requirements are different, the limiting post can be disassembled or assembled simultaneously, further expanding the versatility of the fixture. In addition, it is also convenient to quickly replace and maintain the limiting post after it is worn or damaged, reducing the maintenance cost of long-term use.

[0020] Preferably, the cover plate has a handle on the side facing away from the base.

[0021] By adopting the above technical solution, the handle design greatly facilitates operators in opening and closing heavy covers. Especially on production lines where covers need to be frequently changed to adapt to different products, it can effectively reduce labor intensity, speed up changeover, improve overall testing efficiency, and reduce work-related injuries or fixture damage that may be caused by inconvenient operation.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The waterproof and breathable membrane to be tested is inserted through the mounting holes on the cover plate and precisely covers the test holes on the test plate. This achieves standardized and modular alignment and sealing between the membrane material to be tested and the test holes. This allows the same base to be quickly adapted to various models, sizes and installation methods of waterproof and breathable membranes by changing the cover plates of different specifications, which significantly improves the versatility and reusability of the fixture. 2. The first sealing ring and the second sealing ring are located on both sides of the test plate to form a double seal. The first sealing ring seals the test gas or test liquid that leaks between the test plate and the support, while the second sealing ring is responsible for sealing the area around the membrane material being tested. This ensures that all the test gas or test liquid introduced is used to test the performance of the waterproof and breathable membrane itself, further guaranteeing the absolute accuracy of the test data. Attached image description: Figure 1 This is a schematic diagram of the waterproof testing fixture. Figure 2 An explosion diagram of a waterproof testing fixture; Figure 3 for Figure 2 A sectional view; Figure 4 This is an exploded view of the area between the cover plate, the test plate, and the base.

[0023] Reference numerals: 1. Base; 11. Positioning post; 12. Limiting post; 13. Test station; 14. Sealed cavity; 15. Vent hole; 16. Support part; 161. First sealing groove; 2. Cover plate; 21. Positioning hole; 22. Limiting hole; 23. Mounting hole; 24. Second sealing groove; 25. Handle; 3. Threaded hole; 4. Test plate; 41. Test hole; 5. First sealing ring; 6. Second sealing ring. Detailed implementation method: The following section provides a more detailed description, in conjunction with the accompanying diagrams: As attached Figure 1 and attached Figure 2 As shown, a waterproof testing fixture includes a base 1 and a cover plate 2 that are interlocked. The cover plate 2 has several through positioning holes 21 on the side facing the base 1. The base 1 has a positioning post 11 that is fixedly connected to the side facing the cover plate 2 and inserted into the corresponding positioning hole 21. The positioning post 11 and the positioning hole 21 are coaxially arranged. The cooperation between the positioning hole 21 and the positioning post 11 can ensure that the base 1 and the cover plate 2 are accurately interlocked, thereby improving the accuracy of the test. At the same time, the cover plate 2 and the base 1 are respectively provided with coaxial threaded holes 3. The connection between the cover plate 2 and the base 1 is achieved by bolts threaded into the threaded holes 3.

[0024] The cover plate 2 has several limiting holes 22 in the middle along its own insertion direction. The base 1 has a limiting post 12 on the side facing the cover plate 2, which is inserted into the corresponding limiting hole 22. The limiting post 12 and the limiting hole 22 are coaxially arranged to provide a higher precision final positioning. The positioning post 11 and the base 1 are threadedly connected. When it is necessary to test another specification of product, if the positioning requirements are different, the limiting post 12 can be disassembled or assembled at the same time, which further expands the versatility of the fixture.

[0025] As attached Figure 3 and attached Figure 4As shown, the base 1 is provided with at least one test station 13. The base 1 has a sealed cavity 14 at the test station 13 along the insertion direction of the cover plate 2. The sealed cavity 14 is an empty cavity. The base 1 also has a vent hole 15. One end of the vent hole 15 is connected to the sealed cavity 14, and the other end of the vent hole 15 is connected to the outside and connected to a feed pipe. Test gas or test liquid can be delivered into the sealed cavity 14 through the feed pipe.

[0026] The base 1 is located at the test station 13 and is also equipped with a test plate 4. The test plate 4 is a rectangular plate structure. The test plate 4 covers the opening of the sealed cavity 14. The test plate 4 has a test hole 41 along the insertion direction of the cover plate 2. The test hole 41 is connected to the sealed cavity 14. The test hole 41 can allow test gas or test liquid to pass through. The size of the test hole 41 can be adjusted according to actual needs.

[0027] The cover plate 2 has an installation hole 23 that is opposite to the sealing cavity 14. The installation hole 23 is for the waterproof and breathable membrane to be tested to be inserted and cover the test hole 41. The installation hole 23 can be a circular hole, and its diameter can be designed according to the size of the waterproof and breathable membrane to be tested. The edge of the installation hole 23 can be chamfered to facilitate the insertion of the membrane material.

[0028] The base 1 is provided with a support portion 16 that protrudes towards the cover plate 2 at the opening edge of the sealed cavity 14. The support portion 16 abuts against the test plate 4. The support portion 16 has a ring structure, and the circumferential inner wall of the support portion 16 is flush with the inner wall of the sealed cavity 14. The protrusion height of the support portion 16 is sufficient to ensure stable contact with the test plate 4. The force generated when the support portion 16 locks the cover plate 2 is accurately concentrated and distributed to the periphery of the effective sealing area on the back of the test plate 4, avoiding the locking force being dispersed to other non-critical or weak areas of the base 1. This ensures a tight and stable surface contact between the test plate 4 and the upper surface of the support portion 16, enhancing the static sealing reliability of the interface between the support portion 16 and the test plate 4.

[0029] The support part 16 has a first sealing groove 161 on the side facing the test plate 4. The first sealing groove 161 is an annular groove. A first sealing ring 5 is provided in the first sealing groove 161 to abut against the test plate 4. The first sealing ring 5 is made of rubber and has good elasticity and sealing performance. The first sealing ring 5 fits tightly against the test plate 4. The first sealing ring 5 can effectively compensate for the micro-unevenness of the contact surface between the test plate 4 and the support part 16, block the test gas or test liquid that may leak from the interface, and completely isolate the sealed cavity 14 from the external environment. This ensures that all the test gas or test liquid introduced is used to test the performance of the waterproof and breathable membrane itself, and will not leak from the body seam of the fixture.

[0030] The cover plate 2 abuts against the test plate 4 on the side facing the base 1, and a second sealing groove 24 is opened on the side of the cover plate 2 facing the base 1. The second sealing groove 24 is an annular groove, and a second sealing ring 6 is provided in the second sealing groove 24 to abut against the test plate 4. The second sealing ring 6 is made of rubber and has good elasticity and sealing performance. The second sealing ring 6 is tightly attached to the test plate 4. The second sealing ring 6 is responsible for sealing the surrounding area of ​​the membrane material being tested. The pressing force of the second sealing ring 6 acts on the test plate 4 to ensure that the sealing force is evenly distributed around the effective test area of ​​the membrane material.

[0031] A handle 25 is fixedly connected to the side of the cover plate 2 facing away from the base 1, which makes it convenient for operators to open and close the heavy cover plate 2. Especially on production lines where the cover plate 2 needs to be frequently replaced to adapt to different products, it can effectively reduce labor intensity.

[0032] The implementation principle of this embodiment is as follows: The cover plate 2 presses the upper surface of the test plate 4 with the second sealing ring 6 to seal the edge of the membrane material. The support part 16 of the base 1 presses the lower surface of the test plate 4 with the first sealing ring 5 to isolate the risk of cavity leakage and ensure that the test pressure is accurately applied to the membrane material itself. Through the combination of the base 1 and the replaceable cover plate 2, it can quickly adapt to the testing of waterproof and breathable membranes of different specifications.

[0033] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A waterproof test fixture, characterized by, It includes a base (1) and a cover plate (2) that are plugged into each other. The base (1) is provided with at least one test station (13). The base (1) has a sealed cavity (14) and a vent (15) connected to the sealed cavity (14) at the test station (13). It also includes a test plate (4) covering the opening of the sealed cavity (14), the test plate (4) having a test hole (41) communicating with the sealed cavity (14), and the cover plate (2) having an installation hole (23) opposite to the sealed cavity (14), the installation hole (23) for the waterproof and breathable membrane to be tested to be inserted and covered by the test hole (41).

2. The waterproof test fixture of claim 1, wherein, The base (1) is provided with a support (16) that protrudes toward the cover plate (2) at the opening edge of the sealed cavity (14), and the support (16) abuts against the test plate (4).

3. The waterproof test fixture of claim 2, wherein, The support part (16) has a first sealing groove (161) on the side facing the test plate (4), and a first sealing ring (5) that abuts against the test plate (4) is provided in the first sealing groove (161).

4. A waterproof testing fixture according to claim 1, characterized in that, The cover plate (2) abuts against the test plate (4) on the side facing the base (1), and the cover plate (2) has a second sealing groove (24) on the side facing the base (1), and a second sealing ring (6) is provided in the second sealing groove (24) to abut against the test plate (4).

5. A waterproof testing fixture according to claim 1, characterized in that, The cover plate (2) has a positioning hole (21) in the vertical direction, and the base (1) has a positioning post (11) on the side facing the cover plate (2) that is inserted into the positioning hole (21).

6. A waterproof testing fixture according to claim 1, characterized in that, The cover plate (2) has a limiting hole (22) in the middle along the vertical direction, and the base (1) has a limiting post (12) inserted into the limiting hole (22) on the side facing the cover plate (2).

7. A waterproof testing fixture according to claim 6, characterized in that, The limiting post (12) and the base (1) are detachably connected.

8. A waterproof testing fixture according to claim 1, characterized in that, The cover plate (2) has a handle (25) on the side facing away from the base (1).

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