A waterproof reliability testing fixture for miniature loudspeakers

Abstract

This utility model discloses a waterproof reliability testing fixture for miniature loudspeakers, comprising a lower mold, an upper mold, a sealing ring, a second sealing gasket, a sealing block, and a pressing screw. The lower mold has a connected test port and a receiving groove. The upper mold is movably connected to the lower mold and has a connected vent hole and a threaded hole. The threaded hole connects to the outer surface of the upper mold, and the vent hole connects to the receiving groove. The diameter of the vent hole is smaller than the diameter of the threaded hole, and a second stepped surface is formed at the interface between the vent hole and the threaded hole. The sealing ring is arranged around the receiving groove and abuts against both the upper and lower molds. The second sealing gasket is placed on the second stepped surface and has an exhaust hole that aligns with the vent hole. The sealing block is placed in the threaded hole and abuts against the second sealing gasket. The pressing screw is threaded into the threaded hole and presses against the sealing block. This waterproof reliability testing fixture for miniature loudspeakers has a novel structure and will not damage the miniature loudspeakers.

Description

Technical Field

[0001] This utility model relates to the field of testing fixture technology, and in particular to a waterproof reliability testing fixture for a miniature loudspeaker. Background Technology

[0002] With the widespread use of smartphones and mobile devices, the market demand for miniature speakers is constantly increasing. At the same time, more and more users want their devices to be waterproof, necessitating reliability and waterproof testing for miniature speakers.

[0003] During reliability and waterproof testing, the miniature speaker product needs to be placed in a sealed fixture. The sealed fixture consists of a tightly connected upper mold and a lower mold. After the upper mold and the lower mold are connected, a receiving groove is formed at the interface. After the miniature speaker to be tested is placed in the receiving groove, a rear cavity is defined within the receiving groove. A sealing ring is set at the interface between the upper mold and the lower mold. The receiving groove is located in the hollow area of ​​the sealing ring. Because the sealing ring has a certain deformation and the cross-section of the receiving groove is relatively large, when the upper mold and the lower mold are tightly connected, the volume of the rear cavity will decrease significantly. This will cause the internal air pressure of the miniature speaker product placed in the receiving groove to increase significantly, causing the diaphragm of the miniature speaker product to be pushed outward or even break in the middle, affecting the waterproof reliability test. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a novel waterproof reliability testing fixture for miniature loudspeakers that will not damage the miniature loudspeaker product under test.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a waterproof reliability testing fixture for miniature loudspeakers, comprising:

[0006] The lower mold has a connected test port and a receiving groove. A first stepped surface is formed at the boundary between the test port and the receiving groove. A first sealing gasket is provided on the first stepped surface surrounding the test port.

[0007] The upper mold is movably connected to the lower mold. The upper mold has a vent hole and a threaded hole that are connected. The threaded hole is connected to the outer surface of the upper mold, and the vent hole is connected to the receiving groove. The diameter of the vent hole is smaller than the diameter of the threaded hole. A second step surface is formed at the interface between the vent hole and the threaded hole.

[0008] A sealing ring is provided around the receiving groove, and the sealing ring abuts against the upper mold and the lower mold respectively;

[0009] A second sealing gasket is placed on the second step surface, and the second sealing gasket has an exhaust hole that mates with the vent hole;

[0010] A sealing block, which is placed inside a threaded hole and abuts against the second sealing gasket;

[0011] A pressing screw is provided, which is threaded into the threaded hole and presses against the sealing block.

[0012] Furthermore, it also includes a sealing groove surrounding the receiving groove, with the sealing ring disposed within the sealing groove, and the entire area of ​​the sealing groove located on the lower mold; or, the entire area of ​​the sealing groove located on the upper mold; or, a portion of the sealing groove located on the lower mold and another portion located on the upper mold.

[0013] Furthermore, the upper mold has a boss that extends into the receiving groove.

[0014] Furthermore, the bottom surface of the boss is provided with a buffer pad.

[0015] Furthermore, the lower mold includes a connected base and a pressure frame. The base is provided with a mounting groove, the pressure frame is located in the mounting groove, the test port is located on the base, and the hollow area of ​​the pressure frame is the receiving groove.

[0016] Furthermore, the base and the pressure frame clamp the outer edge of the first sealing gasket.

[0017] Furthermore, the inner edge of the pressure frame is provided with a guide surface.

[0018] Furthermore, the guiding surface is an inclined surface or an arc surface.

[0019] Furthermore, the diameter of the sealing block is larger than the diameter of the second sealing gasket.

[0020] Furthermore, the pressing screw has a contact arc surface that abuts against the sealing block.

[0021] The beneficial effects of this utility model are as follows: This waterproof reliability testing fixture for miniature loudspeakers has a novel structure. The pressure screw is assembled after the upper and lower molds are fastened together. When the upper and lower molds are fastened together, the gas in the receiving groove can be discharged through the vent hole. The vent hole has a small cross-section. When the pressure screw is installed later, only the second sealing gasket deforms. The overall volume of the rear cavity decreases slightly, and the air pressure in the rear cavity does not change significantly. This effectively improves the phenomenon of the diaphragm of the miniature loudspeaker product being pushed outward or even broken in the middle. It ensures that the waterproof reliability testing fixture for miniature loudspeakers will not damage the miniature loudspeaker product under test, and allows the waterproof reliability test to be carried out smoothly. Attached Figure Description

[0022] Figure 1A cross-sectional view of a waterproof reliability testing fixture for miniature loudspeakers.

[0023] Label Explanation:

[0024] 1. Lower mold; 11. Test port; 12. Receiving groove; 13. Sealing groove; 14. Base; 141. Mounting groove; 15. Pressure frame; 151. Guide surface;

[0025] 2. Upper mold; 21. Vent hole; 22. Threaded hole; 23. Boss; 24. Buffer pad;

[0026] 3. Sealing ring;

[0027] 4. Second sealing gasket; 41. Vent hole;

[0028] 5. Sealing block;

[0029] 6. Pressing screw; 61. Contact arc surface;

[0030] 7. First sealing gasket. Detailed Implementation

[0031] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0032] Please refer to Figure 1 A waterproof reliability testing fixture for a miniature loudspeaker includes a lower mold 1, an upper mold 2, a sealing ring 3, a second sealing gasket 4, a sealing block 5, and a pressing screw 6. The lower mold 1 has a test port 11 and a receiving groove 12 connected together. A first stepped surface is formed at the boundary between the test port 11 and the receiving groove 12. A first sealing gasket 7 is provided on the first stepped surface surrounding the test port 11. The upper mold 2 is movably connected to the lower mold 1. The upper mold 2 has a vent hole 21 and a threaded hole 22 connected together. The threaded hole 22 communicates with the outer surface of the upper mold 2. 1. A connecting receiving groove 12 is provided. The diameter of the vent hole 21 is smaller than the diameter of the threaded hole 22. A second step surface is formed at the interface between the vent hole 21 and the threaded hole 22. A sealing ring 3 is provided around the receiving groove 12. The sealing ring 3 abuts against the upper mold 2 and the lower mold 1 respectively. A second sealing gasket 4 is placed on the second step surface. The second sealing gasket 4 has an exhaust hole 41 that connects to the vent hole 21. A sealing block 5 is placed in the threaded hole 22 and abuts against the second sealing gasket 4. A pressing screw 6 is threadedly engaged with the threaded hole 22. The pressing screw 6 presses against the sealing block 5.

[0033] As can be seen from the above description, the beneficial effects of this utility model are as follows: This miniature loudspeaker waterproof reliability testing fixture has a novel structure. The pressing screw 6 is assembled after the upper mold 2 and the lower mold 1 are fastened together. When the upper mold 2 and the lower mold 1 are fastened together, the gas in the receiving groove 12 can be discharged through the exhaust hole 41. The exhaust hole 41 has a small cross-section. When the pressing screw 6 is installed later, only the second sealing gasket 4 is deformed. The overall volume of the rear cavity is reduced by a slight amount, and the air pressure in the rear cavity does not change significantly. This effectively improves the phenomenon of the diaphragm of the miniature loudspeaker product being pushed outward or even broken in the middle, ensuring that the miniature loudspeaker waterproof reliability testing fixture will not damage the miniature loudspeaker product under test, and allowing the waterproof reliability test to be carried out smoothly.

[0034] Furthermore, it also includes a sealing groove 13 surrounding the receiving groove 12, with a sealing ring 3 disposed in the sealing groove 13, and the entire area of ​​the sealing groove 13 located on the lower mold 1; or, the entire area of ​​the sealing groove 13 located on the upper mold 2; or, a portion of the sealing groove 13 located on the lower mold 1 and another portion located on the upper mold 2.

[0035] As can be seen from the above description, the presence of the sealing groove 13 facilitates the positioning and installation of the sealing ring 3.

[0036] Furthermore, the upper mold 2 has a boss 23 that extends into the receiving groove 12.

[0037] As described above, the boss 23 is used to press against the miniature speaker in the placement groove, so that the miniature speaker and the first sealing gasket 7 form good contact and seal.

[0038] Furthermore, the bottom surface of the boss 23 is provided with a buffer pad 24.

[0039] As can be seen from the above description, the buffer pad 24 can prevent the protrusion 23 from crushing or scratching the miniature speaker.

[0040] Furthermore, the lower mold 1 includes a connected base 14 and a pressure frame 15. The base 14 is provided with a mounting groove 141, the pressure frame 15 is located in the mounting groove 141, the test port 11 is located on the base 14, and the hollow area of ​​the pressure frame 15 is a receiving groove 12.

[0041] As can be seen from the above description, the lower mold 1 has a simple structure and is easy to process and manufacture.

[0042] Furthermore, the base 14 and the pressure frame 15 clamp the outer edge of the first sealing gasket 7.

[0043] As can be seen from the above description, the first sealing gasket 7 can achieve stable installation.

[0044] Furthermore, the inner edge of the pressure frame 15 is provided with a guide surface 151.

[0045] Furthermore, the guide surface 151 is a sloped surface or an arc surface.

[0046] As described above, the guide surface 151 can guide the miniature speaker into the placement slot, which facilitates the operation of the tester.

[0047] Furthermore, the diameter of the sealing block 5 is larger than the diameter of the second sealing gasket 4.

[0048] As can be seen from the above description, the sealing block 5 can effectively press against the second sealing gasket 4.

[0049] Furthermore, the pressing screw 6 has a contact arc surface 61, which abuts against the sealing block 5.

[0050] As can be seen from the above description, the contact arc surface 61 will not scratch the sealing block 5, which helps to extend the service life of the sealing block 5.

[0051] Please refer to Figure 1 Embodiment 1 of this utility model is: a waterproof reliability testing fixture for a miniature loudspeaker, comprising a lower mold 1, an upper mold 2, a sealing ring 3, a second sealing gasket 4, a sealing block 5, and a pressing screw 6. The lower mold 1 has a test port 11 and a receiving groove 12 connected together. A first stepped surface is formed at the boundary between the test port 11 and the receiving groove 12. A first sealing gasket 7 is provided on the first stepped surface surrounding the test port 11. The first sealing gasket 7 is used to contact the miniature loudspeaker located in the receiving groove 12 and form a seal with the miniature loudspeaker. The upper mold 2 is movably connected to the lower mold 1. In this embodiment, the upper mold 2 and the lower mold 1 are detachably set, and the upper mold 2 and the lower mold 1 are fastened together by a first screw. The upper mold 2 has a... A vent hole 21 and a threaded hole 22 are connected. The threaded hole 22 is connected to the outer surface of the upper mold 2, and the vent hole 21 is connected to the receiving groove 12. The diameter of the vent hole 21 is smaller than the diameter of the threaded hole 22. A second step surface is formed at the interface between the vent hole 21 and the threaded hole 22. A sealing ring 3 is arranged around the receiving groove 12 and abuts against the upper mold 2 and the lower mold 1 respectively. A second sealing gasket 4 is placed on the second step surface and has an exhaust hole 41 that connects to the vent hole 21. A sealing block 5 is placed in the threaded hole 22 and abuts against the second sealing gasket 4. The diameter of the sealing block 5 is larger than the diameter of the second sealing gasket 4. A pressing screw 6 is threaded into the threaded hole 22 and presses against the sealing block 5.

[0052] Before installing the sealing block 5 and the contact screw, place the micro loudspeaker to be tested in the placement slot, ensuring that the vibrating sound-emitting surface of the micro loudspeaker to be tested is away from the upper mold 2. Then assemble the upper mold 2 and the lower mold 1, so that the sealing ring 3 is pressed. Part of the air in the area enclosed by the sealing ring 3, the upper mold 2 and the lower mold 1 (this part of the air volume is relatively large and has a significant impact on the air pressure in the rear cavity of the micro loudspeaker to be tested) is discharged through the vent hole 41 of the second sealing gasket 4. After the upper mold 2 and the lower mold 1 are connected in place, put the sealing block 5 into the threaded hole 22, and finally tighten the contact screw.

[0053] The material of the first sealing gasket 7 can be rubber, the material of the sealing ring 3 can be rubber, and the material of the second sealing gasket 4 can be rubber.

[0054] The waterproof reliability testing fixture for miniature loudspeakers also includes a sealing groove 13 surrounding the receiving groove 12, with a sealing ring 3 disposed within the sealing groove 13. The entire area of ​​the sealing groove 13 is located on the lower mold 1; or, the entire area of ​​the sealing groove 13 is located on the upper mold 2; or, a portion of the sealing groove 13 is located on the lower mold 1, and another portion is located on the upper mold 2.

[0055] Optionally, the upper mold 2 has a boss 23 that extends into the receiving groove 12. In this embodiment, the bottom surface of the boss 23 is provided with a buffer pad 24, and the material of the buffer pad 24 can be rubber or the like.

[0056] To facilitate processing and installation of the first sealing gasket 7, the lower mold 1 includes a connected base 14 and a pressure frame 15. The base 14 has a mounting groove 141, and the pressure frame 15 is located within the mounting groove 141. The test port 11 is located on the base 14, and the hollow area of ​​the pressure frame 15 serves as a receiving groove 12. The base 14 and the pressure frame 15 clamp the outer edge of the first sealing gasket 7. The base 14 and the pressure frame 15 are fastened together by a second screw.

[0057] In a preferred embodiment, the inner edge of the pressure frame 15 is provided with a guide surface 151, which is an inclined surface or an arc surface.

[0058] In one or more embodiments, the pressing screw 6 has a contact arc surface 61 that abuts against the sealing block 5.

[0059] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A waterproof reliability testing fixture for miniature loudspeakers, characterized in that, include The lower mold has a connected test port and a receiving groove. A first stepped surface is formed at the boundary between the test port and the receiving groove. A first sealing gasket is provided on the first stepped surface surrounding the test port. The upper mold is movably connected to the lower mold. The upper mold has a vent hole and a threaded hole that are connected. The threaded hole is connected to the outer surface of the upper mold, and the vent hole is connected to the receiving groove. The diameter of the vent hole is smaller than the diameter of the threaded hole. A second step surface is formed at the interface between the vent hole and the threaded hole. A sealing ring is provided around the receiving groove, and the sealing ring abuts against the upper mold and the lower mold respectively; A second sealing gasket is placed on the second step surface, and the second sealing gasket has an exhaust hole that mates with the vent hole; A sealing block, which is placed inside a threaded hole and abuts against the second sealing gasket; A pressing screw is provided, which is threaded into the threaded hole and presses against the sealing block.

2. The waterproof reliability testing fixture for miniature loudspeakers according to claim 1, characterized in that, It also includes a sealing groove surrounding the receiving groove, with the sealing ring disposed within the sealing groove, and the entire area of ​​the sealing groove located on the lower mold; or, the entire area of ​​the sealing groove located on the upper mold; or, a portion of the sealing groove located on the lower mold and another portion located on the upper mold.

3. The waterproof reliability testing fixture for miniature loudspeakers according to claim 1, characterized in that, The upper mold has a boss that extends into the receiving groove.

4. The waterproof reliability testing fixture for miniature loudspeakers according to claim 3, characterized in that, The bottom surface of the boss is provided with a buffer pad.

5. The waterproof reliability testing fixture for miniature loudspeakers according to claim 1, characterized in that, The lower mold includes a connected base and a pressure frame. The base is provided with a mounting groove, the pressure frame is located in the mounting groove, the test port is located on the base, and the hollow area of ​​the pressure frame is the receiving groove.

6. The waterproof reliability testing fixture for miniature loudspeakers according to claim 5, characterized in that, The base and the pressure frame clamp the outer edge of the first sealing gasket.

7. The waterproof reliability testing fixture for miniature loudspeakers according to claim 5, characterized in that, The inner edge of the pressure frame is provided with a guide surface.

8. The waterproof reliability testing fixture for miniature loudspeakers according to claim 7, characterized in that, The guiding surface is an inclined surface or an arc surface.

9. The waterproof reliability testing fixture for miniature loudspeakers according to claim 1, characterized in that, The diameter of the sealing block is larger than the diameter of the second sealing gasket.

10. The waterproof reliability testing fixture for miniature loudspeakers according to claim 1, characterized in that, The pressing screw has a contact arc surface that abuts against the sealing block.

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