Air tightness test tool for rear cavity of loudspeaker

Abstract

The utility model discloses an air tightness test tool used for a loudspeaker rear cavity, comprising a pedestal provided with an accommodating groove used for accommodating a loudspeaker, and the groove bottom of the accommodating groove is provided with an observation hole; the cover plate is arranged on the containing groove in a covering mode, and an air injection hole communicated with the containing groove is formed in the cover plate. The air tightness testing tool provided by the utility model is simple in structure and convenient to operate, and the testing efficiency of a waterproof test of the loudspeaker and the reliability of a testing result can be improved by applying the air tightness testing tool.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeaker testing, in particular to an airtightness testing tool for a loudspeaker rear cavity. Background Art

[0002] With the popularity of smartphones and mobile devices, the market demand for micro speakers is increasing. At the same time, more and more users want their devices to be waterproof to avoid damage to the device due to accidents during use. Therefore, micro speakers need to be tested for waterproof performance during the manufacturing process.

[0003] However, the inventors have found that when the waterproof performance of current micro speakers is tested, the speakers are directly immersed in water, and the rear cavity of the speakers is observed by naked eyes to see if there is water leakage, which results in low efficiency and low reliability of the waterproof performance test of current micro speakers. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide an airtightness test tool for a loudspeaker rear cavity, so as to solve the problems of low efficiency and low reliability of the test results of the current micro loudspeaker waterproof performance test.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: an airtightness test tool for the rear cavity of a loudspeaker, comprising:

[0006] A base, wherein the base is provided with a receiving groove for receiving the speaker, and the bottom of the receiving groove is provided with an observation hole;

[0007] A cover plate is disposed on the receiving groove, and the cover plate is provided with an air injection hole connected with the receiving groove.

[0008] Furthermore, an abutment protrusion is provided at the bottom of the cover plate.

[0009] Furthermore, the gas injection holes and the containing grooves are at least partially staggered.

[0010] Furthermore, the base is provided with a positioning protrusion, the accommodating groove is provided on the positioning protrusion, and the cover plate is provided with a positioning groove matching the positioning protrusion.

[0011] Furthermore, the thickness of the positioning protrusion is equal to the depth of the positioning groove.

[0012] Furthermore, the diameter of the observation hole gradually increases in a direction away from the containing groove.

[0013] Furthermore, the inner contour of the receiving groove matches the outer contour of the speaker.

[0014] Furthermore, the base is provided with an assembly portion, and the assembly portion is provided with an assembly hole.

[0015] Furthermore, the width of the receiving groove is 6.30-6.34 mm, and the length of the receiving groove is 13.30-13.34 mm.

[0016] Furthermore, the depth of the observation hole is 2.7 to 3.3 mm.

[0017] The beneficial effect of the utility model is that the utility model provides an airtightness test tool for the rear cavity of a speaker, the speaker can be placed in the receiving groove, and the rear cavity of the speaker fits with the groove bottom of the receiving groove, so that the rear cavity of the speaker separates the receiving groove and the observation hole. During the test, the cover plate is tightly covered on the base, and the cover plate is connected to an external air source device through the air injection hole to inject air into the front cavity of the speaker through the air injection hole. At this time, it can be observed through the observation hole whether the rear cavity is completely sealed. When the airtightness of the rear cavity is unqualified, bubbles will be generated at the leaking position, and the leaking position of the rear cavity can be judged. Therefore, the airtightness test tool has a simple structure and is easy to operate. The application of the airtightness test tool can improve the test efficiency of the speaker waterproof test and the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the airtightness test tool of the utility model in one embodiment at a viewing angle;

[0019] Figure 2 for Figure 1 The schematic diagram of the structure of the airtightness test fixture shown in another perspective;

[0020] Figure 3 for Figure 2 Middle AA section view;

[0021] Figure 4 for Figure 1 Schematic diagram of the middle base structure;

[0022] Figure 5 for Figure 1 Schematic diagram of the middle cover structure.

[0023] Description of labels:

[0024] 1. Base; 11. Accommodating groove; 12. Observation hole; 13. Positioning protrusion; 14. Assembly part; 141. Assembly hole;

[0025] 2. Cover plate; 21. Air injection hole; 22. Resistance protrusion; 23. Positioning groove. DETAILED DESCRIPTION

[0026] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0027] Please refer to Figures 1 to 5 , an airtightness test tool for a loudspeaker rear cavity, comprising:

[0028] A base 1, wherein the base 1 is provided with a receiving groove 11 for receiving the speaker, and an observation hole 12 is formed at the bottom of the receiving groove 11;

[0029] The cover plate 2 is covered on the receiving groove 11 , and the cover plate 2 is provided with an air injection hole 21 communicating with the receiving groove 11 .

[0030] As can be seen from the above description, the beneficial effect of the utility model is that the utility model provides an airtightness test tool for the rear cavity of a speaker, the speaker can be placed in the receiving groove 11, and the rear cavity of the speaker fits with the bottom of the receiving groove 11, so that the rear cavity of the speaker separates the receiving groove 11 from the observation hole 12. During the test, the cover plate 2 is tightly covered on the base 1, and the cover plate 2 is connected to the external air source device through the air injection hole 21 to inject air into the front cavity of the speaker through the air injection hole 21. At this time, it can be observed through the observation hole 12 whether the rear cavity is completely sealed. When the airtightness of the rear cavity is unqualified, bubbles will be generated at the leaking position, and the leaking position of the rear cavity can be judged. Therefore, the airtightness test tool has a simple structure and is easy to operate. The application of the airtightness test tool can improve the test efficiency of the speaker waterproof test and the reliability of the test results.

[0031] Furthermore, an abutment protrusion 22 is provided at the bottom of the cover plate 2 .

[0032] From the above description, it can be seen that when the cover plate 2 is covered with the bottom plate, the abutment protrusion 22 can abut against the front cavity of the speaker placed in the receiving groove 11, thereby ensuring that the rear cavity of the speaker is tightly fitted to the bottom of the receiving groove 11 during the test, avoiding the presence of a gap between the rear cavity and the bottom of the receiving groove 11 and affecting the airtightness test structure.

[0033] Furthermore, the gas injection holes 21 and the notches of the receiving groove 11 are at least partially staggered.

[0034] It can be seen from the above description that the at least partially staggered arrangement of the gas injection holes 21 and the receiving grooves 11 can prevent the front cavity of the speaker from being subjected to excessive airflow during gas injection, thereby preventing the front cavity from being damaged.

[0035] Furthermore, the base 1 is provided with a positioning protrusion 13 , the receiving groove 11 is provided on the positioning protrusion 13 , and the cover plate 2 is provided with a positioning groove 23 matching the positioning protrusion 13 .

[0036] From the above description, it can be seen that the cooperation between the positioning protrusion 13 and the positioning groove 23 can not only improve the positioning performance of the base 1 and the cover 2, but also improve the sealing performance of the cover 2 to the receiving groove 11, thereby improving the reliability of the airtightness test result.

[0037] Furthermore, the thickness of the positioning protrusion 13 is equal to the depth of the positioning groove 23 .

[0038] As can be seen from the above description, when the cover plate 2 is placed in place, the upper surface of the positioning protrusion 13 and the bottom of the positioning groove 23 can fit tightly together, thereby improving the sealing performance of the cover plate 2 to the receiving groove 11.

[0039] Furthermore, the diameter of the observation hole 12 gradually increases in a direction away from the receiving groove 11 .

[0040] It can be seen from the above description that the structure of the observation hole 12 can relatively increase the operator's field of view for observing the rear cavity of the speaker, thereby making it more convenient for the operator to observe whether there is a water leak in the rear cavity of the speaker.

[0041] Furthermore, the inner contour of the receiving groove 11 matches the outer contour of the speaker.

[0042] It can be seen from the above description that when the speaker is placed in the receiving groove 11, its outer contour matches the inner contour of the receiving groove 11, which can improve the sealing performance of the airtightness test tooling, thereby ensuring the reliability of the waterproof test.

[0043] Furthermore, the base 1 is provided with an assembly portion 14 , and the assembly portion 14 is provided with an assembly hole 141 .

[0044] It can be seen from the above description that the base 1 can be connected to an external driving mechanism through the assembly portion 14 .

[0045] Furthermore, the width of the receiving groove 11 is 6.30-6.34 mm, and the length of the receiving groove 11 is 13.30-13.34 mm.

[0046] According to the above description, the length and width of the receiving groove 11 correspond to the length and width of the speaker respectively.

[0047] Furthermore, the depth of the observation hole 12 is 2.7-3.3 mm.

[0048] Embodiment 1

[0049] Please refer to Figures 1 to 5, Embodiment 1 of the utility model is: to provide an airtightness test tool for a rear cavity of a loudspeaker, which comprises a base 1 and a cover plate 2. The base 1 is provided with a receiving groove 11 for accommodating the loudspeaker. In actual application, the rear cavity of the loudspeaker is placed on the side close to the bottom of the receiving groove 11, and the bottom of the receiving groove 11 is provided with an observation hole 12 corresponding to the rear cavity of the loudspeaker. The cover plate 2 is covered at the notch of the receiving groove 11 so that a test cavity is enclosed between the cover plate 2 and the receiving groove 11. When the loudspeaker is placed in the receiving groove 11, the loudspeaker can fit tightly with the bottom of the receiving groove 11 to partition the observation hole 12 and the receiving cavity, thereby sealing the test cavity; the cover plate 2 is provided with an injection hole 21 connected with the receiving groove 11, and the injection hole 21 can be connected to an external air source device to inject gas into the receiving groove 11.

[0050] In actual application, after the speaker is placed in the receiving groove 11, the cover 2 can be closed to form a test cavity between the speaker, the base 1 and the cover 2, and then the air tightness test tooling is placed in water as a whole, and the air source device is controlled to inject air into the receiving groove 11. At this time, the state of the rear cavity of the speaker can be observed through the observation hole 12. If bubbles are generated in the rear cavity of the speaker, it proves that the waterproof performance of the speaker is unqualified, and the position where the bubbles are generated in the rear cavity is the leakage position of the rear cavity.

[0051] Please refer to Figure 5 In order to ensure that the speaker can fit tightly against the bottom of the receiving groove 11 during testing so as to separate the receiving groove 11 from the observation hole 12, in this embodiment, an abutment protrusion 22 is provided at the bottom of the cover plate 2. When the cover plate 2 is covered at the notch of the receiving groove 11, the abutment protrusion 22 can abut against the speaker in the receiving groove 11 so that the lower surface of the speaker fits tightly against the bottom of the receiving groove 11.

[0052] like Figure 3 As shown, in this embodiment, the air injection holes 21 and the notches of the receiving groove 11 are at least partially staggered to prevent the front cavity of the speaker from being damaged by excessive airflow during air injection.

[0053] In this embodiment, an assembly portion 14 is provided on the base 1 so that the base 1 can be connected to an external driving mechanism, thereby improving the testing efficiency of the airtightness testing tool.

[0054] In this embodiment, the inner contour of the receiving groove 11 matches the outer contour of the speaker; in detail, the receiving groove 11 is a rectangular groove, and the width W of the receiving groove 11 is 6.30~6.34mm, and the length L of the receiving groove 11 is 13.30~13.34mm, and the width and length of the receiving groove 11 correspond to the width and length of the outer contour of the speaker, respectively.

[0055] In this embodiment, the depth H of the observation hole 12 is 2.7-3.3 mm, and the diameter of the observation hole 12 gradually increases in the direction away from the receiving groove 11. The structure of the observation hole 12 makes it more convenient for operators to observe the rear cavity of the speaker.

[0056] In addition, in this embodiment, reference Figure 3 It is not difficult to see that an inclined guide surface is provided at the notch of the receiving groove 11 to facilitate the operator to place or take out the speaker.

[0057] In summary, the utility model provides an airtightness test tool for the rear cavity of a speaker. The speaker can be placed in the receiving groove 11, and the rear cavity of the speaker fits with the bottom of the receiving groove 11, so that the rear cavity of the speaker separates the receiving groove 11 from the observation hole 12. During the test, the cover plate 2 is tightly covered on the base 1, and the cover plate 2 is connected to the external air source device through the air injection hole 21 to inject air into the front cavity of the speaker through the air injection hole 21. At this time, it can be observed through the observation hole 12 whether the rear cavity is completely sealed. When the airtightness of the rear cavity is unqualified, bubbles will be generated at the leaking position, and the leaking position of the rear cavity can be determined. Therefore, the airtightness test tool has a simple structure and is easy to operate. The application of the airtightness test tool can improve the test efficiency of the speaker waterproof test and the reliability of the test results.

[0058] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A tool for testing the air tightness of a loudspeaker rear cavity, characterized in that: include: A base, wherein the base is provided with a receiving groove for receiving the speaker, and the bottom of the receiving groove is provided with an observation hole; A cover plate is disposed on the receiving groove, and the cover plate is provided with an air injection hole connected with the receiving groove.

2. The airtightness test tool according to claim 1, characterized in that: The bottom of the cover plate is provided with an abutment protrusion.

3. The airtightness test tool according to claim 1, characterized in that: The gas injection holes and the notches of the accommodating groove are at least partially staggered.

4. The airtightness test tool according to claim 1, characterized in that: The base is provided with a positioning protrusion, the accommodating groove is provided on the positioning protrusion, and the cover plate is provided with a positioning groove matching the positioning protrusion.

5. The airtightness test tool according to claim 4, characterized in that: The thickness of the positioning protrusion is equal to the depth of the positioning groove.

6. The airtightness test tool according to claim 1, characterized in that: The diameter of the observation hole gradually increases in a direction away from the receiving groove.

7. The airtightness test tool according to claim 1, characterized in that: The inner contour of the receiving groove matches the outer contour of the speaker.

8. The airtightness test tool according to claim 1, characterized in that: The base is provided with an assembly part, and the assembly part is provided with an assembly hole.

9. The airtightness test tool according to claim 1, characterized in that: The width of the receiving groove is 6.30-6.34 mm, and the length of the receiving groove is 13.30-13.34 mm.

10. The airtightness test tool according to claim 1, characterized in that: The depth of the observation hole is 2.7-3.3 mm.

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