CN106454663B

CN106454663B - Loudspeaker module

Info

Publication number: CN106454663B
Application number: CN201611085623.9A
Authority: CN
Inventors: 霍新祥; 韩丹; 杨赟
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2022-02-18
Anticipated expiration: 2036-11-30
Also published as: WO2018099074A1; CN106454663A

Abstract

The invention discloses a loudspeaker module, which comprises a module shell and a loudspeaker monomer accommodated in the module shell, wherein the loudspeaker monomer divides a module inner cavity enclosed by the module shell into a front sound cavity and a rear sound cavity, a partition plate used for separating the front sound cavity from the rear sound cavity is arranged in the module inner cavity, a pressure relief channel which is communicated with the front sound cavity and the rear sound cavity and is acoustically sealed is arranged on the partition plate, the pressure relief channel comprises a through hole arranged on the partition plate, a boss is arranged at the position of the through hole on the partition plate, a through hollow hole is arranged on the surface of the boss right opposite to the through hole, the peripheral edge of the hollow hole is positioned outside the peripheral edge of the opening of the through hole, and a certain distance is reserved between the peripheries of the through hole and the through hole; the surface of the boss is provided with a pressure relief groove, the initial end of the pressure relief groove is connected with the hollow hole, and the tail end of the pressure relief groove extends to the end head of the boss. According to the loudspeaker module, the pressure relief device is easy to seal temporarily, so that the air tightness test of the front sound cavity is facilitated, and the test efficiency is improved.

Description

Loudspeaker module

Technical Field

The invention relates to the technical field of electroacoustic products, in particular to a loudspeaker module.

Background

The speaker module is an important acoustic component of the portable electronic device, is used for completing the conversion between an electric signal and a sound signal, and is an energy conversion device. The existing loudspeaker module generally comprises a module shell and a loudspeaker monomer, wherein a module inner cavity for accommodating the loudspeaker monomer is formed in the module shell, and the loudspeaker monomer divides the module inner cavity into a front sound cavity and a rear sound cavity.

In order to keep the air pressure of the rear sound cavity balanced with the air pressure of the outside, the pressure relief device is an indispensable component of the loudspeaker module. The existing loudspeaker module is provided with the pressure relief device which is often arranged between the front sound cavity and the rear sound cavity, so that the loudspeaker module does not depend on the pressure relief of the rear sound cavity.

Referring to fig. 1, a typical structure of a pressure relief device of a waterproof speaker module is that a partition plate is arranged between a front sound cavity and a rear sound cavity in the speaker module, a boss 8 is arranged on the partition plate, a through hole 71 which simultaneously penetrates through the boss 8 is formed in the partition plate, the through hole 71 communicates the front sound cavity with the rear sound cavity, and a pressure relief groove 72 is formed in the boss 8 in a manner of extending from the through hole to the end side wall of the boss 8 so as to prolong a pressure relief channel. In the production process of the loudspeaker module, the front sound cavity of the waterproof loudspeaker module is generally subjected to waterproof test through an air pressure test method, when the front sound cavity of the loudspeaker module is subjected to air tightness test, the pressure relief channel is required to be covered by a test tool for temporary sealing, and then the air tightness test of the front sound cavity can be carried out. However, in the conventional speaker module having such a structure, the pressure release groove 72 extends to the end side wall of the boss, and the pressure release groove 72 has an opening in the side wall of the boss 8, so that the test fixture can cover only the through hole 71 and the pressure release groove 72 from above, and cannot seal the opening of the pressure release groove 72 in the side wall of the boss 8, and thus it is difficult to temporarily seal the entire pressure release path.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: provided is a speaker module in which a pressure relief device is easily temporarily sealed.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a loudspeaker module comprises a module shell and a loudspeaker single body contained in the module shell, wherein the loudspeaker single body divides a module inner cavity enclosed by the module shell into a front sound cavity and a rear sound cavity, a partition plate used for separating the front sound cavity from the rear sound cavity is arranged in the module inner cavity, a pressure relief channel which is communicated with the front sound cavity and the rear sound cavity and is sealed acoustically is arranged on the partition plate, the pressure relief channel comprises a through hole formed in the partition plate, a boss is arranged at the through hole on the partition plate, a through hollowed hole is formed in the boss, the surface of the boss is opposite to the through hole, the peripheral edge of the hollowed hole is positioned outside the peripheral edge of the opening of the through hole, and a certain distance is reserved between the peripheries of the hollowed hole and the through hole; the surface of the boss is provided with a pressure relief groove, the starting end of the pressure relief groove is connected with the hollow hole, and the tail end of the pressure relief groove extends towards the end head of the boss.

Preferably, the hollowed-out holes are circular or square hollowed-out holes.

Preferably, a damping member covering the through hole is provided on a surface of the partition plate on a side adjacent to the front acoustic chamber.

Preferably, the damping member is a waterproof membrane which is air-permeable and water-impermeable.

Preferably, a support plate is adhered to the side face, far away from the partition plate, of the waterproof membrane, and the support plate is hollowed out corresponding to the through hole.

Preferably, a damper groove for accommodating the damper is provided in the partition plate at a position of the through hole.

Preferably, a cover plate is arranged on the surface of the boss, and the cover plate covers the through hole and part of the pressure relief groove.

Preferably, the boss is provided on the side of the partition plate adjacent to the rear acoustic chamber.

Preferably, the pressure relief groove is straight or curved.

Preferably, the module case includes an upper case, a middle case, and a lower case that are fastened together, and the partition is disposed on the middle case.

After the technical scheme is adopted, the invention has the beneficial effects that:

according to the loudspeaker module, the through hollow hole is formed in the position, opposite to the through hole, on the surface of the boss, the peripheral edge of the hollow hole is located on the outer side of the peripheral edge of the opening of the through hole, and a certain distance is reserved between the peripheries of the through hole and the opening. The initial end of the pressure relief groove on the surface of the boss is connected with the hollow hole, and the tail end of the pressure relief groove extends to the end of the boss. The loudspeaker module of this kind of structure, when carrying out the gas tightness test to the preceding sound chamber of loudspeaker module, cover the fretwork hole from the boss through test fixture, need not cover the pressure release groove again and can realize the sealed of pressure release passageway, easily make pressure release passageway realize temporarily sealed, made things convenient for the gas tightness test in preceding sound chamber, make the method that passes through the atmospheric pressure test come to carry out waterproof test easily to the preceding sound chamber of waterproof loudspeaker module and realize, improved efficiency of software testing.

Drawings

Fig. 1 is a schematic structural diagram of a pressure relief device in a conventional speaker module;

FIG. 2 is a schematic structural diagram of a speaker module according to the present invention;

FIG. 3 is a schematic longitudinal cross-sectional view taken along A-A of FIG. 1;

FIG. 4 is a schematic view of the structure of the middle shell of FIG. 2;

FIG. 5 is a schematic view of the portion of the pressure relief device of FIG. 4 (excluding the cover plate);

FIG. 6 is a schematic diagram of the construction of the portion of the pressure relief device of FIG. 4 (including the cover plate);

FIG. 7 is a schematic illustration of the temporary sealing of the pressure relief device of FIG. 4;

FIG. 8 is a schematic diagram of a portion of a pressure relief passage of the pressure relief device of FIG. 3;

in the figure: 1. an upper shell; 2. a middle shell; 21. a partition plate; 3. a lower case; 4. a speaker unit; 5. a front acoustic chamber; 6. a rear acoustic chamber; 7. a pressure relief channel; 71. a through hole; 72. a pressure relief groove; 73. hollowing out holes; 8. a boss; 9. a water-resistant film; 10. double-sided adhesive tape; 11. a support plate; 12. a cover plate; 13. and (5) temporarily sealing the tool.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

With reference to figures 2, 3 and 4, fig. 5 and fig. 6, the speaker module of this embodiment includes a module housing and a speaker unit 4 accommodated in the module housing, the speaker unit 4 divides a module inner cavity enclosed by the module housing into two cavities, namely a front acoustic cavity 5 and a rear acoustic cavity 6, a partition plate 21 for separating the front acoustic cavity 5 from the rear acoustic cavity 6 is arranged in the module inner cavity, a pressure relief device is arranged on the partition plate 21, the pressure relief device includes a pressure relief channel 7 which is communicated with the front acoustic cavity 5 and the rear acoustic cavity 6 and is acoustically sealed, the pressure relief channel 7 includes a through hole 71 arranged on the partition plate 21, a boss 8 is arranged on the partition plate 21 at the position of the through hole 71, a through hollowed hole 73 is arranged on the surface of the boss 8 opposite to the through hole 71, the peripheral edge of the hollowed hole 73 is located outside the peripheral edge of the opening of the through hole 71, and a certain distance is left between the peripheries of the two; the surface of the boss 8 is provided with a pressure relief groove 72, the initial end of the pressure relief groove is connected with a hollow hole 73, and the tail end of the pressure relief groove extends towards the end of the boss 8.

Referring to fig. 5, the present embodiment shows a circular hollow 73 having a diameter larger than that of the through hole. Of course, the hollow 73 may also take a square or other shape.

In this embodiment, the module case includes an upper case 1, a middle case 2, and a lower case 3, which are fastened together, and a partition 21 is provided on the middle case 2. The speaker unit 4, together with the partition 21, divides the module chamber into a front acoustic chamber 5 and a rear acoustic chamber 6.

In the loudspeaker module according to the present invention, the pressure relief channel 7 is acoustically sealed, which means that it is acoustically sealed, i.e. does not allow sound waves to pass through, for a person skilled in the art. This pressure relief channel 7 is acoustically sealed, that is to say, the sound in the front acoustic chamber 5 does not pass through this pressure relief channel 7 into the rear acoustic chamber 6, so that the isolation of the front acoustic chamber 5 from the rear acoustic chamber 6 can be ensured to prevent the loudspeaker from failing.

The acoustic sealing of the pressure relief channel 7 may be achieved by means known to the person skilled in the art, e.g. by making the pressure relief channel 7 small or by other known means, increasing the damping of the pressure relief channel 7 into a damping structure, thereby preventing sound from propagating in the pressure relief channel 7.

Referring to fig. 8, a damper covering the through hole 71 is provided on a surface of the present diaphragm 21 remote from the pressure relief groove 72, that is, a surface of the diaphragm 21 close to the front sound chamber 5. A damper groove for accommodating a damper is provided in the partition plate 21 at a position of the through hole 71. In this embodiment, the damping member is a waterproof membrane 9 that is air permeable and water impermeable. The side surface of the waterproof membrane 9 far away from the partition board 21 is adhered with a support plate 11 through a double-sided adhesive tape 10, and the support plate 11 is hollowed out corresponding to the through hole 71.

The cover plate 12 is disposed on the surface of the boss 8, and the cover plate 12 may be a resilient pad fixed to the partition 21 to cover the through hole 71, the hollow hole 73 and a part of the pressure relief groove 72, so that the through hole 71, the hollow hole 73, the pressure relief groove 72 and the cover plate 12 enclose the pressure relief channel 7. The pressure relief grooves 72 extend and are distributed on the surface of the boss 8, so that the length of the pressure relief channel 7 is increased, and the damping effect of the pressure relief channel 7 is improved.

In this embodiment, the pressure relief groove 72 is straight, but may also be curved, wherein the length of the curved pressure relief groove 72 is longer than the extended pressure relief channel 7, so that the damping effect is better.

Referring to fig. 7, when the speaker module of the present invention performs an air-tightness test on the front acoustic cavity 5 of the speaker module, the temporary test fixture 13 covers the hollow hole 73 from the boss 8, and the pressure relief groove is not covered to seal the pressure relief channel, so that the temporary sealing of the front acoustic cavity is easily achieved, which facilitates the air-tightness test of the front acoustic cavity 5, facilitates the implementation of a waterproof test on the front acoustic cavity of the waterproof speaker module by an air pressure test method, and improves the test efficiency.

The foregoing is illustrative of the best mode of the invention and details not described herein are within the common general knowledge of a person of ordinary skill in the art. The scope of the present invention is defined by the appended claims, and any equivalent modifications based on the technical teaching of the present invention are also within the scope of the present invention.

Claims

1. The utility model provides a loudspeaker module, includes the module shell and accepts loudspeaker monomer in the module shell, loudspeaker monomer will the module inner chamber that the module shell encloses is separated for two cavitys in preceding sound chamber and back sound chamber, its characterized in that: a partition board used for separating the front sound cavity from the rear sound cavity is arranged in the module inner cavity, a pressure relief channel which is used for communicating the front sound cavity with the rear sound cavity and is acoustically sealed is arranged on the partition board, the pressure relief channel comprises a through hole formed in the partition board, a boss is arranged at the through hole on the partition board, a through hollow hole is formed in the position, opposite to the through hole, on the surface of the boss, the peripheral edge of the hollow hole is located on the outer side of the peripheral edge of the opening of the through hole, and a certain distance is reserved between the peripheries of the hollow hole and the through hole; the surface of the boss is provided with a pressure relief groove, the initial end of the pressure relief groove is connected with the hollow hole, and the tail end of the pressure relief groove extends towards the end head of the boss;

the baffle closes on the surface of one side in preceding sound chamber is equipped with the damping piece that covers the perforating hole, the damping piece is ventilative waterproof water proof membrane, the waterproof membrane is kept away from paste on the side of baffle has the backup pad, correspond perforating hole department fretwork in the backup pad.

2. The speaker module of claim 1, wherein: the hollow holes are circular or square hollow holes.

3. The speaker module of claim 1, wherein: and a damping piece groove for accommodating the damping piece is arranged on the partition plate at the position of the through hole.

4. The speaker module of claim 1, wherein: and a cover plate is arranged on the surface of the boss and covers the through hole and part of the pressure relief groove.

5. The speaker module of claim 4, wherein: the boss is arranged on one side of the partition plate close to the rear sound cavity.

6. A speaker module according to any one of claims 1-5, wherein: the pressure relief groove is straight or bent.

7. The speaker module as claimed in claim 6, wherein: the module shell comprises an upper shell, a middle shell and a lower shell which are buckled together, and the partition plate is arranged on the middle shell.