WO2021109195A1

WO2021109195A1 - Acoustic testing sealing structure for loudspeaker unit

Info

Publication number: WO2021109195A1
Application number: PCT/CN2019/124840
Authority: WO
Inventors: 姚敬东; 谢远东; 郑欠欠
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声精密制造科技(常州)有限公司
Priority date: 2019-12-02
Filing date: 2019-12-12
Publication date: 2021-06-10
Also published as: CN210868171U

Abstract

The present utility model relates to an acoustic testing sealing structure for a loudspeaker unit, the acoustic testing sealing structure comprising a testing baffle, a sealing gasket and a positioning device, wherein the testing baffle comprises an inner surface and an outer surface, the testing baffle is provided with a sound outlet hole in a penetrating manner, and the inner surface is recessed to form a sealing groove that is arranged around the sound outlet hole; the sealing gasket has a through hole, and the sealing gasket is mounted in the sealing groove; the positioning device comprises an accommodation hole, and the positioning device is fixed on the inner surface; the sealing gasket comprises a steel sheet and a silicone sheet; the inner surface comprises a supporting face and an extending face, and the extending face and the supporting face are enclosed to form the sealing groove; and the steel sheet is clamped in the sealing groove, and the side of the steel sheet that is away from the through hole abuts against the extending face. The present utility model has the beneficial effects of a zero clearance-fit between the steel sheet and the testing baffle to ensure the assembly precision and ensure the testing sealing, and double-sided use of the steel sheet to prolong the service life of the sealing gasket.

Description

Acoustic test sealing structure of speaker unit

Technical field

The utility model relates to the technical field of acoustic testing, in particular to an acoustic testing sealing structure of a speaker unit.

Background technique

The new speaker unit uses a narrower basin frame, which makes the upper mold step surface narrower than the traditional unit. This results in a narrower edge and smaller area for sealing during the test process, which leads to a higher risk of test air leakage.

technical problem

In the sealing scheme of the related technology, workers manually attach the GASKET to the test tooling. However, the manual attaching has a large deviation, which is far greater than 0.15mm, which directly causes the test to be unable to be sealed, which seriously affects the mass production test yield. In order to cooperate with the production of new monomers, the test sealing problem needs to be solved urgently.

Therefore, it is necessary to provide a new acoustic test sealing structure of the speaker unit to solve the above technical problems.

Technical solutions

The purpose of the utility model is to provide an acoustic test sealing structure of a speaker unit, which can solve the technical problem of poor sealing performance in the acoustic performance test of the speaker unit in the related art.

In order to solve the above technical problems, the present invention provides an acoustic test sealing structure for a speaker unit, which is characterized by comprising a test baffle, a sealing pad and a positioning device, and the test baffle includes an inner portion close to the positioning device. Surface and an outer surface opposite to the inner surface, the test baffle is penetrated with a sound hole extending from the inner surface to the outer surface, and the inner surface is recessed to form a sound hole arranged around the sound hole A sealing groove, the sealing gasket is ring-shaped and having a through hole corresponding to the sound hole, the sealing gasket is installed in the sealing groove, and the positioning device includes a speaker unit for accommodating a speaker to be tested The positioning device is fixed on the inner surface and abuts against the sealing pad, the receiving hole is arranged corresponding to the sound hole, and the sealing pad includes a steel sheet and is attached to the steel sheet Silicone sheet on the surface, the inner surface includes a support surface for supporting the gasket and an extension surface extending from the side of the support surface away from the through hole in a direction away from the outer surface, and the extension surface is connected to the The supporting surface encloses the sealing groove, the steel sheet is clamped in the sealing groove, and the side of the steel sheet away from the through hole abuts against the extension surface.

Preferably, the number of the silicone sheet is one piece, and is attached to the surface of the steel sheet on the side facing the positioning device.

Preferably, the number of the silica gel sheets is two, and the steel sheet is sandwiched between the two silica gel sheets.

Preferably, a part of the silicone sheet provided on the side of the steel sheet close to the positioning device is exposed in the receiving hole and corresponds to the speaker unit.

Preferably, the inner surface further includes a mounting groove recessed from the supporting surface for clamping the silicone sheet.

Preferably, the silica gel sheet is a vulcanized silica gel sheet adhered to the steel sheet.

Preferably, the size tolerance of the steel sheet is ±0.01 mm.

Preferably, the size tolerance of the silicone sheet is ±0.1mm.

Beneficial effect

The beneficial effects of the utility model are: the zero-clearance fit between the steel sheet and the test baffle plate ensures the assembly accuracy and the test sealing; the double-sided use of the steel sheet extends the service life of the sealing gasket.

Description of the drawings

Figure 1 is a perspective view of the acoustic test sealing structure of the speaker unit of the present invention;

Figure 2 is a three-dimensional exploded view of the acoustic test sealing structure of the speaker unit of the present invention;

Figure 3 is a cross-sectional view of the acoustic test sealing structure of the speaker unit of the present invention;

Figure 4 is an enlarged view of part A in Figure 3;

Figure 5 is a three-dimensional structural view of the sealing gasket of the present utility model;

6 is a structural cross-sectional view of the first embodiment of the sealing gasket of the present invention;

Fig. 7 is a structural cross-sectional view of the second embodiment of the sealing gasket of the present invention.

Embodiments of the present invention

The present utility model will be further described in detail below in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

1 and 2, the present invention provides an acoustic test sealing structure 100 for a speaker unit, including a test baffle 1, a sealing pad 2, and a positioning device 3. The test baffle 1, the sealing The belt 2 and the positioning device 3 are sequentially stacked from bottom to top, and the speaker unit 4 to be tested is placed in the positioning device 3.

As shown in FIGS. 3 and 4, specifically, the test baffle 1 is an aluminum machined part with a dimensional tolerance of ±0.01mm, including the inner surface 11 close to the positioning device 3 and opposite to the inner surface 11 The test baffle 1 is provided with a sound hole 13 extending from the inner surface 11 to the outer surface 12 through the outer surface 12, and the inner surface 11 is recessed to form a seal surrounding the sound hole 13 Slot 14, in the specific embodiment of the present invention, the sound hole 13 is a square hole.

As shown in FIGS. 5-7, the sealing gasket 2 is ring-shaped and has a through hole 20 corresponding to the sound hole 13, the sealing tape 2 is installed in the sealing groove 14, and the sealing gasket 2 Including a steel sheet 21 and a silicone sheet 22 attached to the surface of the steel sheet 21. Specifically, the size tolerance of the steel sheet is ±0.01mm, the size tolerance of the silicone sheet is ±0.1mm, and the silicone sheet 22 It is a vulcanized silica gel sheet adhered to the steel sheet 21. The steel sheet 21 is clamped in the sealing groove 14 and the gap between the steel sheet 21 and the sealing groove 14 is zero, so as to ensure the assembly accuracy of the sealing gasket 2 and the test baffle 1 , To ensure that the test is sealed.

In an embodiment of the present invention, the number of the silicone sheet 22 is one piece, and it is attached to the side surface of the steel sheet 21 facing the positioning device 3, and the positioning device 3 is installed on the Sealing is achieved on the silicone sheet 22.

In another embodiment of the present invention, the number of the silica gel sheets 22 is two, and the steel sheet 21 is sandwiched between the two silica gel sheets 22. Correspondingly, the test baffle 1 It also includes a mounting groove 12 for clamping the silicone sheet 22, so that the sealing performance can be enhanced and the service life of the sealing gasket 2 can be delayed.

The positioning device 3 includes a receiving hole 31 for accommodating the speaker unit to be tested, the positioning device 3 abuts on the sealing gasket 2 and the receiving hole 31 is arranged corresponding to the sound hole 13, and In this way, it can be ensured that after the speaker unit 4 is positioned, it can be arranged directly opposite to the sound hole 13.

It should be further explained that the silicone sheet 22 disposed on the side of the steel sheet 21 close to the positioning device 3 is partially exposed in the receiving hole 31 and corresponds to the speaker unit 4.

The above are only the preferred embodiments of the present utility model. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these All belong to the protection scope of the utility model.

Claims

An acoustic test sealing structure for a speaker unit, which is characterized by comprising a test baffle, a sealing pad and a positioning device. The test baffle includes an inner surface close to the positioning device and an outer surface opposite to the inner surface The test baffle is penetrated with a sound hole extending from the inner surface to the outer surface, the inner surface is recessed to form a sealing groove arranged around the sound hole, and the sealing gasket is ring-shaped and There is a through hole corresponding to the sound hole, the sealing gasket is installed in the sealing groove, the positioning device includes a receiving hole for accommodating the speaker unit to be tested, and the positioning device is fixed to the The inner surface abuts against the sealing pad, the receiving hole is arranged corresponding to the sound hole, the sealing pad includes a steel sheet and a silicone sheet attached to the surface of the steel sheet, and the inner surface includes a support The supporting surface of the gasket and an extension surface extending from a side of the supporting surface away from the through hole toward a direction away from the outer surface, the extension surface and the supporting surface enclose the sealing groove, so The steel sheet is clamped in the sealing groove and a side of the steel sheet away from the through hole abuts against the extension surface.
The acoustic test sealing structure for a loudspeaker unit according to claim 1, wherein the number of the silicone sheet is one piece, and the silicone sheet is attached to a surface of the steel sheet facing the positioning device.
The acoustic test sealing structure for a speaker unit according to claim 1, wherein the number of the silicone sheet is two, and the steel sheet is sandwiched between the two silicone sheets.
The acoustic test sealing structure of the speaker unit according to claim 2 or 3, wherein the silicone sheet disposed on the side of the steel sheet close to the positioning device is partially exposed in the receiving hole and connected with The speaker unit corresponds.
The acoustic test sealing structure of the speaker unit according to claim 3, wherein the inner surface further comprises a mounting groove recessed from the supporting surface for clamping the silicone sheet.
The acoustic test sealing structure of the speaker unit according to claim 1, wherein the silicone sheet is a vulcanized silicone sheet bonded to the steel sheet.
The acoustic test sealing structure of the speaker unit according to claim 1, wherein the dimensional tolerance of the steel sheet is ±0.01 mm.
The acoustic test sealing structure of the speaker unit according to claim 6, wherein the size tolerance of the silicone sheet is ±0.1 mm.