Air tightness test tool for front cavity of loudspeaker

Abstract

The utility model discloses an air tightness test tool used for a loudspeaker front cavity, comprising a pedestal, the pedestal is provided with an accommodating groove used for accommodating a loudspeaker, the groove bottom of the accommodating groove is provided with an air injection hole, and the pedestal is also provided with a first positioning hole; the cover plate is arranged on the base in a covering mode, the cover plate comprises a fixing part and a pressing part, the fixing part is provided with a second positioning hole corresponding to the first positioning hole, the pressing part is arranged above the containing groove, and the projection of the pressing part in the vertical direction is smaller than that of the containing groove. The air tightness test tool is simple in structure and rapid in operation, can improve the efficiency of detecting the air tightness of the loudspeaker by an operator, and improves the reliability of a test result.

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 front 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 water leakage in the front cavity of the speakers is observed by naked eyes, 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 front cavity of a loudspeaker, 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 front cavity of a loudspeaker, comprising:

[0006] A base, wherein the base is provided with a receiving groove for receiving the speaker, the bottom of the receiving groove is provided with an air injection hole, and the base is also provided with a first positioning hole;

[0007] A cover plate, wherein the cover plate is disposed on the base, the cover plate includes a fixing portion and a pressing portion, the fixing portion is provided with a second positioning hole corresponding to the first positioning hole, and the pressing portion is disposed above the receiving groove, wherein a projection of the pressing portion in the vertical direction is smaller than an area of ​​the receiving groove.

[0008] Furthermore, the cover plate includes two positioning parts, and the two positioning parts are respectively arranged at two ends of the cover plate, so that the cross section of the cover plate is in an "H" shape.

[0009] Furthermore, the accommodating groove is a rectangular accommodating groove, and the pressing portion extends along the width direction of the rectangular accommodating groove.

[0010] Furthermore, the notch opening of the receiving groove is inclined and expanded outwardly, so that the diameter of the notch opening of the receiving groove gradually increases in a direction away from the bottom of the receiving groove.

[0011] Furthermore, grooves are provided on two opposite sides of the base.

[0012] Furthermore, the pressing portion is arranged directly above the gas injection hole.

[0013] Furthermore, the depth of the accommodating groove is 2.97-3.03 mm.

[0014] Furthermore, the bottom length of the accommodating groove is 13.29-13.33 mm, and the bottom width of the accommodating groove is 6.30-6.34 mm.

[0015] Furthermore, the diameter of the first positioning hole is 2.98-3.02 mm, and the diameter of the second positioning hole is 3.18-3.22 mm.

[0016] Furthermore, the diameter of the gas injection hole is 4.98-5.02 mm.

[0017] The beneficial effect of the utility model is that the airtightness testing tool provided by the utility model is placed on the side close to the notch of the accommodating groove, wherein the cover plate is pressed and fixed to the speaker by a pressing part so that the bottom of the speaker is tightly fitted with the bottom of the accommodating groove. During the test, the airtightness testing tool is placed in water, and the air injection hole is connected to an external air source device to inflate the speaker. Since the pressing part will not completely cover the front cavity of the speaker, when the airtightness of the front cavity of the speaker is poor, the operator can observe bubbles emerging at the water leakage position of the front cavity. When the part of the front cavity covered by the pressing part has poor airtightness, the bubbles can emerge from the side of the pressing part. The airtightness testing tool has a simple structure and is quick to operate, which can improve the efficiency of the operator in detecting the airtightness of the speaker and improve the reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the air tightness test tooling from 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. Air injection hole; 13. First positioning hole; 14. Groove;

[0025] 2. Cover plate; 21. Fixing portion; 211. Second positioning hole; 22. Pressing portion. 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 front cavity of a loudspeaker, comprising:

[0028] A base 1, wherein the base 1 is provided with a receiving groove 11 for receiving the speaker, an air injection hole 12 is provided at the bottom of the receiving groove 11, and the base 1 is also provided with a first positioning hole 13;

[0029] The cover plate 2 is covered on the base 1, and the cover plate 2 includes a fixing portion 21 and a pressing portion 22. The fixing portion 21 is provided with a second positioning hole 211 corresponding to the first positioning hole 13, and the pressing portion 22 is arranged above the receiving groove 11, wherein the projection of the pressing portion 22 in the vertical direction is smaller than the area of ​​the receiving groove 11.

[0030] The beneficial effect of the utility model is that: the airtightness test tool provided by the utility model, the front cavity of the speaker is placed on the side close to the notch of the accommodating groove 11, wherein the cover plate 2 is pressed and fixed to the speaker by the pressing part 22, so that the bottom of the speaker is tightly fitted with the bottom of the accommodating groove 11, and the pressing part 22 will not completely cover the front cavity part of the speaker. In the actual test process, the airtightness test tool is placed in water, and the air injection hole 12 is connected to the external air source device to inflate the speaker. If the airtightness of the front cavity of the speaker is poor, bubbles will be generated at the leakage position of the front cavity. When the part of the front cavity covered by the pressing part 22 has poor airtightness, the bubbles can emerge from the side of the pressing part 22. The airtightness test tool has a simple structure and is quick to operate. It can improve the efficiency of operators in detecting the airtightness of the speaker and improve the reliability of the test results.

[0031] Furthermore, the cover plate 2 includes two positioning portions, and the two positioning portions are respectively arranged at two ends of the cover plate 2, so that the cross section of the cover plate 2 is in an "H" shape.

[0032] It can be seen from the above description that the cover plate 2 of the airtightness test fixture can play a better pressing and fixing role on the speaker placed in the receiving groove 11, thereby ensuring the reliability of the speaker airtightness test result.

[0033] Furthermore, the receiving groove 11 is a rectangular receiving groove 11 , and the pressing portion 22 extends along the width direction of the rectangular receiving groove 11 .

[0034] It can be seen from the above description that it can reduce the area of ​​the speaker covered by the projection of the pressing portion 22 in the vertical direction, thereby making it more convenient for the operator to observe whether bubbles are generated in the front cavity of the speaker.

[0035] Furthermore, the notch of the receiving groove 11 is inclined and expanded outward, so that the diameter of the notch of the receiving groove 11 gradually increases in a direction away from the bottom of the receiving groove 11 .

[0036] It can be seen from the above description that the slot of the receiving slot 11 is tilted and expanded outward, which can make it more convenient for operators to place or take out the speaker.

[0037] Furthermore, grooves 14 are provided on two opposite sides of the base 1 .

[0038] It can be seen from the above description that the grooves 14 provided on both sides of the base 1 can facilitate the operator to take the airtightness test tool during the test process.

[0039] Furthermore, the pressing portion 22 is disposed directly above the gas injection hole 12 .

[0040] From the above description, it can be seen that the fixing part 21 has the greatest pressing force on the relative position of the speaker and the air injection hole 12, which can ensure that the speaker and the air injection hole 12 fit tightly, thereby improving the reliability of the test results using the airtight test fixture.

[0041] Furthermore, the depth of the receiving groove 11 is 2.97-3.03 mm.

[0042] It can be seen from the above description that the depth of the receiving groove 11 is set corresponding to the thickness of the speaker.

[0043] Furthermore, the bottom length of the receiving groove 11 is 13.29-13.33 mm, and the bottom width of the receiving groove 11 is 6.30-6.34 mm.

[0044] It can be seen from the above description that the length and width of the bottom of the receiving groove 11 are set to correspond to the length and width of the speaker respectively.

[0045] Furthermore, the diameter of the first positioning hole 13 is 2.98-3.02 mm, and the diameter of the second positioning hole 211 is 3.18-3.22 mm.

[0046] Furthermore, the diameter of the gas injection hole 12 is 4.98-5.02 mm.

[0047] Embodiment 1

[0048] Please refer to Figures 1 to 5 Embodiment 1 of the utility model provides an airtightness testing tool for a front cavity of a loudspeaker, comprising a base 1 and a cover plate 2 covered on the base 1, the base 1 is provided with a receiving groove 11 for accommodating the loudspeaker, the bottom of the receiving groove 11 is provided with an injection hole 12, the base 1 is provided with a first positioning hole 13, the cover plate 2 comprises a fixing portion 21 and a pressing portion 22, the fixing portion 21 is provided with a second positioning hole 211 corresponding to the first positioning hole 13.

[0049] Please refer to Figure 1 In this embodiment, the pressing portion 22 is disposed above the receiving groove 11 , and a projection of the pressing portion 22 in the vertical direction is smaller than an area of ​​the receiving groove 11 .

[0050] In detail, in actual application, the front cavity of the speaker is placed close to the notch of the receiving groove 11, and the cover plate 2 is pressed and fixed to the speaker through the pressing part 22, so that the bottom of the speaker is tightly fitted with the bottom of the receiving groove 11. During the test, the airtightness test tool is placed in water, and the air injection hole 12 is connected to the external air source device to inflate the speaker. Since the pressing part 22 does not completely cover the front cavity of the speaker, when the airtightness of the front cavity of the speaker is poor, the operator can observe bubbles coming out at the water leakage position of the front cavity. When the part of the front cavity covered by the pressing part 22 has poor airtightness, the bubbles can come out from the side of the pressing part 22.

[0051] like Figure 5 As shown, in this embodiment, in order to improve the pressing and fixing effect of the cover plate 2 on the speaker, the cover plate 2 includes two positioning parts, and the two positioning parts are respectively arranged at both ends of the cover plate 2, so that the cross-section of the cover plate 2 is in an "H" shape; in addition, the pressing part 22 is arranged directly above the air injection hole 12.

[0052] from Figure 4 It is not difficult to see that in this embodiment, the slot opening of the receiving slot 11 is tilted and expanded outward so that the diameter of the slot opening of the receiving slot 11 gradually increases in the direction away from the bottom of the receiving slot 11, which can facilitate operators to place or remove the speaker.

[0053] As a preferred example, Figure 2 and Figure 3 As shown, in this embodiment, the bottom length L of the accommodating groove 11 is 13.29-13.33 mm, the bottom width W of the accommodating groove 11 is 6.30-6.34 mm, the depth H of the accommodating groove 11 is 2.97-3.03 mm, and the size of the bottom of the accommodating groove 11 corresponds to the size of the speaker.

[0054] In detail, in this embodiment, the aperture A1 of the first positioning hole 13 is 2.98-3.02 mm, the aperture A2 of the second positioning hole 211 is 3.18-3.22 mm, and the airtightness test fixture further includes a positioning pin arranged in the second positioning hole 211, and when the cover plate 2 is covered on the base 1, the positioning pin passes through the second positioning hole 211. The aperture A3 of the air injection hole 12 is 4.98-5.02 mm.

[0055] In summary, in the airtightness testing tool provided by the utility model, the front cavity of the speaker is placed toward the side close to the notch of the receiving groove 11, wherein the cover plate 2 is pressed and fixed to the speaker by the pressing portion 22, so that the bottom of the speaker is tightly fitted with the bottom of the receiving groove 11, and the pressing portion 22 does not completely cover the front cavity of the speaker. In the actual testing process, the airtightness testing tool is placed in water, and the air injection hole 12 is connected to an external air source device to inflate the speaker. If the airtightness of the front cavity of the speaker is poor, bubbles will be generated at the leaking position of the front cavity. When the part of the front cavity covered by the pressing portion 22 has poor airtightness, the bubbles can emerge from the side of the pressing portion 22. The airtightness testing tool has a simple structure and is quick to operate. It can improve the efficiency of operators in detecting the airtightness of the speaker and improve the reliability of the test results.

[0056] 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. An airtightness test tool for a loudspeaker front cavity, characterized in that: include: A base, wherein the base is provided with a receiving groove for receiving the speaker, the bottom of the receiving groove is provided with an air injection hole, and the base is also provided with a first positioning hole; A cover plate, wherein the cover plate is disposed on the base, the cover plate includes a fixing portion and a pressing portion, the fixing portion is provided with a second positioning hole corresponding to the first positioning hole, and the pressing portion is disposed above the receiving groove, wherein a projection of the pressing portion in the vertical direction is smaller than an area of ​​the receiving groove.

2. The airtightness test tool according to claim 1, characterized in that: The cover plate includes two positioning parts, which are respectively arranged at two ends of the cover plate, so that the cross section of the cover plate is in an "H" shape.

3. The airtightness test tool according to claim 1, characterized in that: The receiving groove is a rectangular receiving groove, and the pressing portion extends along the width direction of the rectangular receiving groove.

4. The airtightness test tool according to claim 1, characterized in that: The notch opening of the receiving groove is inclined and expanded outwardly, so that the diameter of the notch opening of the receiving groove gradually increases in a direction away from the bottom of the receiving groove.

5. The airtightness test tool according to claim 1, characterized in that: The base is provided with grooves on two opposite sides.

6. The airtightness test tool according to claim 1, characterized in that: The pressing part is arranged just above the gas injection hole.

7. The airtightness test tool according to claim 1, characterized in that: The depth of the receiving groove is 2.97-3.03 mm.

8. The airtightness test tool according to claim 7, characterized in that: The bottom length of the receiving groove is 13.29-13.33 mm, and the bottom width of the receiving groove is 6.30-6.34 mm.

9. The airtightness test tool according to claim 1, characterized in that: The diameter of the first positioning hole is 2.98-3.02 mm, and the diameter of the second positioning hole is 3.18-3.22 mm.

10. The airtightness test tool according to claim 1, characterized in that: The diameter of the gas injection hole is 4.98-5.02 mm.

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