WO2022006940A1

WO2022006940A1 - Speaker module

Info

Publication number: WO2022006940A1
Application number: PCT/CN2020/102087
Authority: WO
Inventors: 丁健华; 吴树文
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-07-09
Filing date: 2020-07-15
Publication date: 2022-01-13
Also published as: CN212992532U

Abstract

The present application provides a speaker module, comprising a housing having an accommodation space, and a sound producing unit and a spacer assembly fixedly accommodated in the housing. The sound producing unit comprises a diaphragm. The housing comprises a bottom wall directly facing the diaphragm, a top wall disposed opposite to the bottom wall and spaced apart therefrom, and a side wall extending from the bottom wall and bent toward the top wall. The bottom wall, the side wall, and the top wall surround and define the accommodation space. A blocking wall protrudes toward the top wall from a side of the bottom wall adjacent to the diaphragm. The spacer assembly fixedly covers an end of the blocking wall located away from the bottom wall. The spacer assembly divides the accommodation space into an accommodation chamber for accommodating the sound producing unit and a sound-absorbing chamber for accommodating a sound-absorbing material. The spacer assembly, the blocking wall, and the bottom wall surround and define the accommodation chamber. The sound-absorbing chamber is located between the spacer assembly and the top wall. The spacer assembly comprises a breathable spacer spaced apart from the blocking wall, and a support frame integrally formed with the periphery of the breathable spacer by means of injection molding. The support frame fixedly abuts the blocking wall. The speaker module according to an embodiment provides improved acoustic performance and can be easily assembled.

Description

speaker module

technical field

The present application relates to the field of electro-acoustics, and in particular, to a speaker module.

Background technique

In today's mobile Internet era, the number of intelligent mobile terminal devices is constantly increasing, and the requirements for mobile terminals are getting higher and higher, one of which is the requirement for high-quality sound quality functions.

technical problem

In some technologies, in order to obtain better acoustic effects, sound-absorbing materials are often filled in the internal cavity of the speaker module, and the sound-absorbing materials are encapsulated with breathable spacers. In order to facilitate assembly, the structural design of some speaker modules is unreasonable. , resulting in only a small space capacity for storing sound-absorbing materials, resulting in poor low-frequency acoustic performance.

Therefore, it is necessary to provide a new type of speaker module to solve the above problems.

technical solutions

The purpose of the present application is to provide a speaker module, which is easy to assemble and can accommodate a large amount of sound-absorbing materials.

In order to solve the above-mentioned technical problems, the technical solutions of the present application are as follows: a speaker module, comprising a housing with an accommodation space, and a sounding unit and an isolation assembly that are accommodated and fixed on the housing, and the sounding unit includes a vibrating membrane , the casing includes a bottom wall facing the diaphragm, a top wall opposite to the bottom wall and spaced apart, and a side wall bent and extended from the bottom wall toward the top wall, the bottom wall The wall, the side wall and the top wall enclose the receiving space;

The side of the bottom wall close to the vibrating membrane is protruded from the top wall with a blocking wall, the isolation component is covered and fixed on the end of the blocking wall away from the bottom wall, and the isolation component will The accommodating space is divided into a accommodating cavity for accommodating the sound-emitting unit and a sound-absorbing cavity for accommodating sound-absorbing materials, the isolation component, the retaining wall and the bottom wall are enclosed to form the accommodating cavity, and the sound-absorbing cavity is located in the cavity. between the isolation assembly and the top wall;

The isolation assembly includes a ventilating isolation piece spaced from the blocking wall, and a support ring integrally injection-molded with a peripheral edge of the ventilating isolation piece, the support ring abutting and being fixed to the blocking wall.

As an improvement, the support ring and the port of the accommodating groove are ultrasonically welded or fixed by gluing.

As an improvement, the edge of the air-permeable spacer is embedded in the support ring, and the support ring is injection-molded on opposite sides of the air-permeable spacer.

As an improvement, the bottom wall further protrudes toward the sound-generating unit with a support wall for supporting the sound-generating unit, and the support wall abuts on the periphery of the sound-generating unit and is connected to the sound-generating unit. bonding.

As an improvement, the air-permeable spacer and the sound-generating unit are spaced apart.

As an improvement, the sound generating unit is spaced from the bottom wall to form a front sound cavity, and the side wall is provided with a sound outlet channel connecting the front sound cavity and the outside.

As an improvement, the retaining wall, the supporting wall and the bottom wall are integrally formed.

As an improvement, an injection hole is opened on the bottom wall and/or the top wall, the injection hole communicates with the sound absorption cavity, and the sound absorption material is filled into the sound absorption cavity through the injection hole.

As an improvement, a sealing cover is also included, and the sealing cover is provided on the injection hole.

As an improvement, the top wall and/or the bottom wall also has a leakage hole arranged at intervals from the injection hole through the top wall, and the speaker module further includes a leakage hole attached to the top wall and covering the leakage hole. The air-permeable mesh cloth with holes, the hole diameter of the leakage hole is smaller than the hole diameter of the injection hole.

beneficial effect

The beneficial effect of the present application is that the accommodating space is divided into the accommodating cavity for accommodating the sound-emitting component and the sound-absorbing cavity for accommodating the sound-absorbing material by the isolation component, and the isolation component, the retaining wall and the bottom wall are enclosed to form the accommodating cavity. All areas outside can be filled with sound-absorbing materials, so that there is a lot of space in the speaker module in this embodiment for filling with sound-absorbing materials, which improves the acoustic performance of the speaker module. One-piece injection molding, so during assembly, the step of gluing or welding the breathable spacer on the support ring can be omitted, and since the breathable spacer is made of soft material, the breathable spacer is glued or welded on the support ring. Therefore, the assembly steps of the speaker module in this embodiment are simplified, and the assembly is simpler and more convenient.

Description of drawings

1 is a schematic diagram of the overall structure of a speaker module according to an embodiment of the application;

Fig. 2 is the exploded schematic diagram of the loudspeaker module in Fig. 1;

3 is a cross-sectional view of the speaker module A-A in FIG. 1;

Fig. 4 is the assembly schematic diagram of the support ring and the breathable spacer in Fig. 1;

Fig. 5 is the overall structure schematic diagram of the bracket in Fig. 1;

In the figure: 100, shell; 101, accommodating cavity; 102, sound-absorbing cavity; 103, front acoustic cavity; 104, injection hole; 105, leakage hole; 110, bottom wall; 120, top wall; 130, side wall; 131, Sound channel; 140, retaining wall; 150, supporting wall; 160, sealing cover; 170, breathable mesh; 200, sounding monomer; 211, diaphragm; 300, isolation component; 310, breathable spacer; 320, support Ring; 400, dustproof and breathable mesh.

Embodiments of the present invention

To further illustrate each practical example, the present application provides accompanying drawings. These drawings are part of the disclosure content of the present application, and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant description of the specification to explain the operation principles of the embodiments. With reference to these contents, one of ordinary skill in the art will understand other possible implementations and advantages of the present application. Components in the figures are not drawn to scale, and similar component symbols are often used to represent similar components.

The present application will be further described below with reference to the accompanying drawings and embodiments.

Please refer to FIG. 1 to FIG. 5 , an embodiment of the present application provides a speaker module. The speaker module in this embodiment includes a housing 100 having a receiving space and a sound-generating unit accommodated and fixed to the housing 100 . 200 and isolation assembly 300.

Please refer to FIG. 1 to FIG. 3 , the sound-generating unit 200 in this embodiment includes a diaphragm 211 , and the housing 100 includes a bottom wall 110 facing the diaphragm 211 , opposite and spaced from the bottom wall 110 . The provided top wall 120 and the side wall 130 bent and extended from the bottom wall 110 toward the top wall 120 , the bottom wall 110 , the side wall 130 and the top wall 120 enclose the receiving space.

Preferably, the top wall 120 and the end of the side wall 130 away from the bottom wall 110 are ultrasonically welded.

Referring to FIGS. 1 to 5 , in this embodiment, a side of the bottom wall 110 close to the diaphragm 211 is protruded with a blocking wall 140 toward the top wall 120 , and the isolation component 300 is covered and fixed At the end of the blocking wall 140 away from the bottom wall 110 , the isolation component 300 divides the accommodation space into an accommodation cavity 101 for accommodating the sound-emitting unit 200 and a sound-absorbing cavity 102 for accommodating the sound-absorbing material. The component 300 , the retaining wall 140 and the bottom wall 110 are enclosed to form the accommodating cavity 101 , and the sound absorbing cavity 102 is located between the isolation component 300 and the top wall 120 . Specifically, the sound absorbing cavity 102 is enclosed and formed by the isolation assembly 300 , the retaining wall 140 , the bottom wall 110 and the top wall 120 . Since all areas of the accommodation space except the accommodation cavity 101 can be filled with sound-absorbing materials, there is a large amount of space in the accommodation space for filling with sound-absorbing materials, which improves the acoustic performance of the speaker module.

Preferably, the bottom wall 110 and the retaining wall 140 are integrally formed, preferably integrally injection-molded, to simplify production and assembly.

Preferably, the shape of the accommodating cavity 101 is adapted to the sound-generating unit 200, so that the space for placing the sound-generating unit 200 can be reduced, so that more space can be reserved for placing the sound-absorbing material, In order to make the low-frequency acoustic performance of the speaker module in this embodiment better.

Please refer to FIG. 2 , FIG. 3 and FIG. 5 , the isolation assembly 300 in this embodiment includes a ventilating isolation member 310 disposed at intervals from the retaining wall 140 , and a gas permeable isolation member 310 integrally formed by injection molding with the periphery of the ventilating isolation member 310 . A support ring 320, the support ring 320 is in contact with the retaining wall 140 and is fixed. By integrally injection molding the air-permeable spacer 310 and the support ring 320, during assembly, the step of gluing or welding the air-permeable spacer 310 on the support ring 320 can be omitted, and since the air-permeable spacer 310 is made of a soft material Therefore, the steps of gluing or welding the ventilating spacer 310 on the support ring 320 are time-consuming and labor-intensive. Therefore, the assembly steps of the speaker module in this embodiment are simplified, and the assembly is simpler and more convenient.

Preferably, the edge of the air-permeable spacer 310 is embedded in the support ring 320 , and the support ring 320 is injection-molded on opposite sides of the air-permeable spacer 310 .

Please refer to FIG. 2 , FIG. 3 and FIG. 5 , the support ring 320 in this embodiment is disposed on the housing 100 , specifically, the support ring 320 is disposed on the retaining wall 140 , preferably all The support ring 320 and the retaining wall 140 are ultrasonically welded and fixed or glued.

In some related technologies, the air-permeable spacer 310 is often placed on the side of the sound-generating unit 200, so that the accommodating cavity 101 where the sound-generating unit 200 is placed occupies a large space, so that the sound-absorbing cavity 102 is too small, and the acoustic performance cannot be significantly improved. In addition, in some related technologies, the air-permeable spacer 310 does not constitute a part of the accommodating cavity 101, so that part of the space between the air-permeable spacer 310 and the accommodating cavity 101 cannot be fully utilized, resulting in the sound-absorbing cavity 102 being too small, and the acoustic performance is poor. can be significantly improved. In order to solve the above problems, please refer to FIGS. 2 , 3 and 5 . The area is also large enough, which can greatly improve the smooth performance of the communication between the accommodating cavity 101 and the sound-absorbing cavity 102, and can better improve the acoustic performance of the speaker module in this embodiment. It forms a part of the accommodating cavity 101 , so that the space between the top wall 120 and the air-permeable spacer 310 can be well utilized to place the sound-absorbing material.

Please refer to FIG. 2 , FIG. 3 and FIG. 5 , in this embodiment, the bottom wall 110 further protrudes toward the sound-generating unit 200 with a support wall 150 for supporting the sound-generating unit 200 . It abuts on the periphery of the sound-generating unit 200 and is bonded to the sound-generating unit 200 . Preferably, the sound generating unit 200 and the support wall 150 are ultrasonically welded or fixed by glue.

Referring to FIG. 3 , a gap is left between the air-permeable spacer 310 and the sound-generating unit 200 in this embodiment, and further, sufficient air can be made between the sound-generating unit 200 and the air-permeable spacer 310 The circulation is more conducive to the propagation of sound, and the acoustic performance of the speaker module in this embodiment can be improved.

The sound-absorbing material in this embodiment is made of zeolite particles, and of course can also be made of other materials that can improve acoustic performance.

Referring to FIG. 3 , there is a gap between the air-permeable spacer 310 and the top wall 120 in this embodiment, so as to ensure the communication between the accommodating cavity 101 and the sound-absorbing cavity 102 , thereby improving this embodiment. Reliable performance and low frequency acoustic performance of speaker modules in

The breathable spacer 310 in this embodiment is a breathable mesh cloth 170, and the breathable spacer 310 may also be a non-woven fabric, a nylon woven mesh, a wool knitted mesh, a metal mesh, or paper.

Referring to FIG. 3 , in this embodiment, the sound generating unit 200 is spaced from the bottom wall 110 to form a front sound cavity 103 , and the side wall 130 defines a sound outlet channel 131 connecting the front sound cavity 103 and the outside. Specifically, one end of the sound outlet channel 131 away from the sound producing unit 200 communicates with the outside world, and one end of the sound outlet channel 131 close to the sound producing unit 200 communicates with the front acoustic cavity 103 .

Please refer to FIGS. 1 to 3 , the speaker module in this embodiment further includes a dust-proof ventilation net attached to the side wall 130 and covering the end of the sound outlet channel 131 away from the sound-emitting unit 200 Cloth 400.

Please refer to FIG. 1 , FIG. 2 and FIG. 5 , in this embodiment, the bottom wall 110 and/or the top wall 120 is provided with an injection hole 104 , and the injection hole 104 communicates with the sound absorbing cavity 102 , so The sound-absorbing material is filled into the sound-absorbing cavity 102 through the injection hole 104 .

Referring to FIG. 2 , the housing 100 in this embodiment further includes a sealing cover 160 , and the sealing cover 160 covers the injection hole 104 . Specifically, after the sound-absorbing material is filled into the sound-absorbing cavity 102 through the injection hole 104 , the injection hole 104 is sealed with the sealing cover 160 .

Please refer to FIG. 2 and FIG. 5 , in this embodiment, the top wall 120 and/or the bottom wall 110 also have a leakage hole 105 disposed therethrough and spaced apart from the injection hole 104 . To balance the internal and external sound pressures of the sound-absorbing cavity 102, the speaker module further includes a breathable mesh cloth 170 attached to the top wall 120 and/or the bottom wall 110 and covering the leakage holes 105. The diameter of the hole 105 is smaller than the diameter of the injection hole 104 .

Preferably, the leakage hole 105 is formed through the top wall 120 , and the injection hole 104 is formed through the bottom wall 110 .

The speaker module in this embodiment can not only be conveniently produced and assembled, but also can maximize the use of the space of the cavity for filling the sound-absorbing material, so that the acoustic performance can be well improved.

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

Claims

A loudspeaker module is characterized in that: it includes a casing with a receiving space, a sound-producing unit and an isolation component that are accommodated and fixed on the casing, the sound-producing unit includes a vibrating membrane, and the casing includes a A bottom wall facing the diaphragm, a top wall opposite to the bottom wall and spaced apart, and a side wall bent and extended from the bottom wall toward the top wall, the bottom wall, the side wall and the The top wall encloses the receiving space;

The side of the bottom wall close to the vibrating membrane is protruded from the top wall with a blocking wall, the isolation component is covered and fixed on the end of the blocking wall away from the bottom wall, and the isolation component will The accommodating space is divided into a accommodating cavity for accommodating the sound-emitting unit and a sound-absorbing cavity for accommodating sound-absorbing materials, the isolation component, the retaining wall and the bottom wall are enclosed to form the accommodating cavity, and the sound-absorbing cavity is located in the cavity. between the isolation assembly and the top wall;

The isolation assembly includes a ventilating isolation piece spaced from the blocking wall, and a support ring integrally injection-molded with a peripheral edge of the ventilating isolation piece, the support ring abutting and being fixed to the blocking wall.
The speaker module according to claim 1, wherein the support ring and the port of the accommodating groove are ultrasonically welded and fixed or glued.
The speaker module according to claim 2, wherein the edge of the air-permeable spacer is embedded in the support ring, and the support ring is injection-molded on opposite sides of the air-permeable spacer.
The loudspeaker module according to any one of claims 1-3, wherein the bottom wall further protrudes from the bottom wall toward the sound-generating unit with a support wall for supporting the sound-generating unit. Abutting on the periphery of the sound-generating unit and bonding with the sound-generating unit.
The speaker module according to claim 4, wherein the air-permeable spacer and the sound-generating unit are arranged at intervals.
The loudspeaker module according to claim 4, wherein the sound generating unit and the bottom wall are spaced apart to form a front sound cavity, and a sound outlet channel connecting the front sound cavity and the outside is opened on the side wall.
The speaker module according to claim 4, wherein the retaining wall, the supporting wall and the bottom wall are integrally formed.
The speaker module according to claim 7, wherein an injection hole is formed on the bottom wall and/or the top wall, the injection hole communicates with the sound-absorbing cavity, and the sound-absorbing material passes through the sound-absorbing cavity. The injection hole is filled into the sound-absorbing cavity.
The speaker module according to claim 8, further comprising a sealing cover, the sealing cover being disposed on the injection hole.
The loudspeaker module according to claim 9, wherein the top wall and/or the bottom wall are further provided with leakage holes spaced apart from the injection holes, and the loudspeaker module further comprises a The air-permeable mesh cloth is attached to the top wall and/or the bottom wall and covers the leakage holes, and the hole diameter of the leakage holes is smaller than the hole diameter of the injection holes.