WO2022006936A1

WO2022006936A1 - Loudspeaker module

Info

Publication number: WO2022006936A1
Application number: PCT/CN2020/102075
Authority: WO
Inventors: 丁健华; 吴树文; 胡橙; 沈凯华
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: CN212992595U

Abstract

The present application provides a loudspeaker module. The loudspeaker module comprises: a support; a cover body, covering the support and defining a cavity body with the support in an enclosing manner; an air-permeable isolation member, which is accommodated in the cavity body; and a sound production unit, which is accommodated in the cavity body. The cavity body is divided into an accommodating cavity and a sound absorption cavity by means of the air-permeable isolation member, the air-permeable isolation member covers the sound production unit and defines the accommodating cavity with the support in an enclosing manner, a supporting rib extending towards the air-permeable isolation member in a protruding manner is arranged on a side of the sound production unit close to the air-permeable isolation member, and the air-permeable isolation member abuts against the supporting rib. The cavity body is divided into the accommodating cavity and the sound absorption cavity by means of the air-permeable isolation member, the sound production unit is placed in the accommodating cavity, the supporting rib is arranged on the sound production unit, and the air-permeable isolation member abuts against the supporting rib; and by means of the supporting rib supporting the air-permeable isolation member, the air-permeable isolation member can be prevented from being attached to the surface of the sound production unit due to deformation, such that a situation whereby the acoustic performance of the loudspeaker module is affected due to the deformation of the air-permeable isolation member can be avoided.

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. However, since the breathable spacers are mostly made of soft materials, in Under the pressure of the sound-absorbing material, the air-permeable spacer is easily deformed and attached to the surface of the speaker sound-emitting unit, thereby affecting the acoustic performance of the speaker.

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 with more stable acoustic performance.

The technical solution of the present application is as follows: a speaker module, the speaker module includes a bracket, a cover that is covered on the bracket and is enclosed with the bracket to form a cavity, and a ventilating air contained in the cavity an isolator; the air-permeable isolator divides the cavity into an accommodation cavity and a sound-absorbing cavity, and the speaker module further includes a sound-emitting unit accommodated in the accommodation cavity; the air-permeable isolator is covered on the The sound-generating unit is enclosed with the bracket to form the accommodating cavity. The side of the sound-generating unit close to the air-permeable spacer is provided with a support rib that protrudes and extends toward the air-permeable spacer. The piece is pressed against the support rib.

Further, the bracket includes a bottom shell and a blocking wall extending from the bottom shell to the cover body, the peripheral edge of the sound-emitting unit is in contact with the blocking wall, and the air-permeable spacer includes a cover provided on the cover. The body part on the side of the sound-generating unit away from the bottom case, the extension part bent and extended from the periphery of the body part toward the bottom case, and the extension part extending away from the sound-generating unit and extending away from the sound-generating unit. The fixing part is fixed on the retaining wall; the body part is in contact with the supporting rib.

Further, the sound-generating unit includes a vibration system and a magnetic circuit system that drives the vibration system to vibrate. It includes a magnetic bowl spaced apart from the vibration system, and the support rib is arranged on a side of the magnetic bowl close to the gas permeable spacer.

As a further example, there are a plurality of the support ribs, and the plurality of the support ribs are arranged on the magnetic bowl at intervals.

As a further example, the bottom case includes a bottom wall and a side wall extending from the periphery of the bottom wall toward the cover body, and the retaining wall is formed extending from the bottom wall to the cover body and located at the The side wall is close to the side of the sound-generating unit, the side of the retaining wall away from the side wall is recessed toward the side wall to form a support step, the vibration system abuts on the support step, and the The fixing part is fixed on one end of the blocking wall close to the cover body.

Further, the vibration system includes a vibrating membrane spaced apart from the magnetic bowl and facing the bottom wall, the vibrating membrane and the bottom wall are spaced apart to form a front acoustic cavity, and a Front sound cavity and external sound channel.

As a further example, the support, the air-permeable spacer and the cover body are enclosed to form the sound-absorbing cavity, the sound-absorbing cavity and the accommodating cavity are arranged side by side, and the sound-absorbing cavity is filled with sound-absorbing material.

As a further example, an injection hole is formed on the cover body and/or the bracket, the injection hole communicates with the sound absorption cavity, and the sound absorption material is injected into the sound absorption cavity through the injection hole.

Further, the cover body and/or the bracket is provided with a leak hole, the leak hole communicates with the sound absorbing cavity, the sound generating unit is provided with a leak portion, and the sound generating unit passes through the The leakage part, the air-permeable spacer and the sound-absorbing cavity communicate with the leakage hole.

As a further aspect, the sound-generating unit includes a basin frame, a vibration system and a magnetic circuit system fixedly supported on the basin frame, and the magnetic circuit system includes a magnetic bowl formed at least partially spaced from the basin frame. the leak.

beneficial effect

The beneficial effect of the present application is that: the cavity is divided into a accommodating cavity and a sound-absorbing cavity by a ventilating spacer, a sound-generating unit is placed in the accommodating cavity, a support rib is arranged on the sound-generating unit, and the ventilating spacer is pressed against the support rib , The support of the breathable spacer by the support ribs can prevent the breathable spacer from sticking to the surface of the sound-emitting unit due to deformation, thereby preventing the deformation of the breathable spacer from affecting the acoustic performance of the speaker module. Assembly is also more convenient, and the acoustic performance of the speaker module in this embodiment is more stable.

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 in FIG. 1 along A-A;

4 is a cross-sectional view of the loudspeaker module in FIG. 1 along B-B;

Fig. 5 is the assembly schematic diagram of the bracket and the breathable spacer in Fig. 1;

Fig. 6 is the exploded structure schematic diagram of the sounding monomer in Fig. 1;

Fig. 7 is the overall structure schematic diagram of the bracket in Fig. 1;

FIG. 8 is a schematic diagram of the overall structure of the air-permeable spacer in FIG. 1 .

Embodiments of the present invention

To further illustrate the various embodiments, the present invention is provided with the accompanying drawings. These drawings are a part of the disclosure of the present invention, which 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 embodiments and advantages of the present invention. 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.

Referring to FIGS. 1 to 8 , an embodiment of the present application provides a speaker module. The speaker module in this embodiment includes a bracket 100 , a cover 200 , a sounding unit 300 and a ventilating spacer 400 .

Referring to FIGS. 3-7 , the bracket 100 in this embodiment includes a bottom case 110 , and the cover 200 is covered on the bottom case 110 to form a cavity 101 . Specifically, the bottom case 110 includes The bottom wall 120 and the side wall 130 extending from the periphery of the bottom wall 120 toward the cover body 200 are formed. in the cavity 101 .

Please refer to FIG. 3 , FIG. 4 and FIG. 6 , the air-permeable spacer 400 in this embodiment divides the cavity 101 into an accommodation cavity 102 and a sound-absorbing cavity 103 , and the sound-emitting unit 300 is accommodated in the accommodation cavity 102 , the sound-absorbing cavity 103 is filled with sound-absorbing material.

Please refer to FIG. 3 , FIG. 4 , and FIG. 6 , the air-permeable spacer 400 in this embodiment is covered on the sounding unit 300 and enclosed with the bracket 100 to form the accommodating cavity 102 . The bracket 100 further includes a blocking wall 140 extending from the bottom wall 120 toward the cover 200 and located on the side of the side wall 130 close to the sound-generating unit 300 . The baffle wall 140 is in contact with the baffle wall 140 , and the edge of the ventilating spacer 400 is fixed on the baffle wall 140 and forms the accommodating cavity 102 with the baffle wall 140 and the bottom wall 120 .

Referring to FIGS. 2 to 6 , in this embodiment, the sound-generating unit 300 is provided with a support rib 3211 protruding and extending toward the air-permeable isolator 400 on the side close to the air-permeable isolator 400 . The spacer 400 is pressed against the support ribs 3211 . The support of the ventilating spacer 400 by the support ribs 3211 can prevent the ventilating spacer 400 from sticking to the surface of the sounding unit 300 due to deformation, thereby preventing the deformation of the ventilating spacer 400 from affecting the acoustic performance of the speaker module. The acoustic performance of the speaker module in the embodiment is more stable. Since the support ribs 3211 support the air-permeable spacer 400, a gap is left between the surface of the sound-generating unit 300 facing the air-permeable spacer 400 and the air-permeable spacer 400, so that gas can pass through the air-permeable spacer 400. The sound-generating unit 300 and the air-permeable spacer 400 flow smoothly.

Referring to FIG. 8 , the air-permeable spacer 400 in this embodiment includes a body portion 410 covered on the side of the sound-generating unit 300 away from the bottom case 110 . The extension portion 420 of the bottom case 110 is bent and extended, and the fixing portion 430 extending from the extension portion 420 away from the sounding unit 300 and fixed to the blocking wall 140 ; the fixing portion 430 is connected to the blocking wall. 140 is fixed, preferably by ultrasonic welding or gluing, and the body portion 410 is in abutment with the support rib 3211 . By arranging the air-permeable spacer 400 in a three-dimensional shape with the extension portion 420 and the body portion 410, the height of the blocking wall 140 can be reduced on the basis that the sound-generating unit 300 can be covered, so that the air-permeable spacer can be correspondingly increased The area of the component 400 can be increased to increase the space for the monomer to leak through the air-permeable spacer 400, and the volume of the sound-absorbing cavity 103 can also be appropriately increased to fill more sound-absorbing materials and further improve the acoustic performance.

Referring to FIGS. 3 to 6 , the sound-generating unit 300 in this embodiment includes a vibration system 310 and a magnetic circuit system 320 that drives the vibration system 310 to vibrate, and the air-permeable spacer 400 covers the sound-generating unit 300 Close to one side of the magnetic circuit system 320 , the magnetic circuit system 320 includes a magnetic bowl 321 arranged spaced apart from the vibration system 310 , and a main magnetic steel 322 and a secondary magnetic steel 323 arranged on the magnetic bowl 321 . The support rib 3211 is disposed on the side of the magnetic bowl 321 close to the air-permeable spacer 400 .

Referring to FIGS. 3-6 , there are a plurality of the supporting ribs 3211 in this embodiment, and the plurality of the supporting ribs 3211 are disposed on the magnetic bowl 321 at intervals. So that the support effect is better.

Referring to FIG. 6 , in this embodiment, a side of the blocking wall 140 away from the side wall 130 is recessed toward the side wall 130 to form a support step 150 , and the vibration system 310 abuts on the support step 150 Above, the fixing portion 430 is fixedly arranged on one end of the blocking wall 140 close to the cover body 200 .

Referring to FIG. 6 , the sound-generating unit 300 in this embodiment includes a basin frame 312 , and the vibration system 310 includes a diaphragm 311 fixed on the basin frame 312 and facing the bottom wall 120 opposite to the magnetic bowl 321 at a distance. The basin frame 312 is fixed on the support step 150 , and the diaphragm 311 is sandwiched and fixed between the support step 150 and the basin frame 312 , preferably by gluing, the diaphragm 311 and the bottom wall 120 are fixed. The diaphragm 311 is spaced apart from the bottom wall 120 to form a front acoustic cavity 104 , and the side wall 130 is provided with a sound outlet channel 131 connecting the front acoustic cavity 104 and the outside.

Referring to FIG. 3 and FIG. 4 , in this embodiment, the bracket 100 , the ventilating spacer 400 and the cover 200 are enclosed to form a sound absorbing cavity 103 , and the sound absorbing cavity 103 is filled with sound absorbing material. The sound absorbing cavity 103 and the accommodating cavity 102 are arranged side by side, so that all the spaces in the cavity 101 except the accommodating cavity 102 where the sound emitting unit 300 is placed are filled with the sound absorbing material, so that the maximum By optimally utilizing the space of the cavity 101, a larger amount of the sound-absorbing material can be placed, thereby improving the reliability performance and low-frequency acoustic performance of the speaker module in this embodiment.

Please refer to FIGS. 1 to 4 , 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-out channel 131 away from the sound-generating unit 300 Cloth 500.

Please refer to FIG. 2 , FIG. 5 and FIG. 7 , in this embodiment, the bottom wall 120 and/or the cover 200 is provided with an injection hole 105 , and the injection hole 105 communicates with the sound absorbing cavity 103 , so The sound-absorbing material is filled into the sound-absorbing cavity 103 through the injection hole 105 .

Referring to FIG. 2 , the housing in this embodiment further includes a sealing cover 160 , and the sealing cover 160 is covered on the injection hole 105 . Specifically, after filling the sound-absorbing cavity 103 with the sound-absorbing material through the injection hole 105 , the injection hole 105 is sealed with the sealing cover 160 .

Please refer to FIG. 1 and FIG. 2 , in this embodiment, the cover body 200 and/or the bottom wall 120 is further provided with a leakage hole 106 spaced apart from the injection hole 105 and attached to the cover body. 200 and/or the bottom wall 120 and the breathable mesh 170 covering the leakage hole 106, the leakage hole 106 communicates with the sound-absorbing cavity 103, and the hole diameter of the leakage hole 106 is smaller than the hole diameter of the injection hole 105 .

Referring to FIG. 3 and FIG. 4 , the sound-generating unit 300 in this embodiment is provided with a leaking part 324 , and the sound-generating unit 324 passes through the leaking part 324 , the air-permeable spacer 400 and the sound-absorbing cavity in sequence. 103 communicates with the leakage hole 324 , and the magnetic bowl 321 and the basin frame 312 are at least partially spaced apart to form the leakage portion 324 .

In this embodiment, the bottom wall 120 and the retaining wall 140 are integrally formed, preferably integrally injection-molded, to simplify production and assembly.

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.

The breathable spacer 400 in this embodiment is a breathable mesh cloth, and the breathable spacer 400 may also be a non-woven fabric, a nylon woven mesh, a wool knitted mesh, a metal mesh, or paper.

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 101 for filling the sound-absorbing material, so that the acoustic performance can be well improved. And the sounding unit 300 is provided with a support rib 3211, and the breathable spacer 400 is pressed against the support rib 3211. The support of the breathable spacer 400 by the support rib 3211 can prevent the breathable spacer 400 from sticking to the sounding unit due to deformation. The surface of the body 300 can be prevented from affecting the acoustic performance of the speaker module due to the deformation of the ventilating spacer 400, and the assembly of the ventilating spacer 400 is also more convenient, and the acoustic performance of the speaker module in this embodiment is more stable.

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, characterized in that: the loudspeaker module comprises a bracket, a cover that is covered on the bracket and is enclosed with the bracket to form a cavity, and a ventilation spacer accommodated in the cavity; The air-permeable spacer divides the cavity into an accommodation cavity and a sound-absorbing cavity, and the speaker module further includes a sound-emitting unit accommodated in the accommodation cavity; the breathable spacer covers the sound-emitting unit and is enclosed with the bracket to form the accommodating cavity, the sounding unit is provided with a support rib that protrudes and extends toward the air-permeable isolator on the side close to the air-permeable isolator, and the air-permeable isolator is pressed against on the support ribs.
The loudspeaker module according to claim 1, wherein the bracket comprises a bottom shell and a blocking wall extending from the bottom shell to the cover body, and the periphery of the sounding unit is in contact with the blocking wall Then, the air-permeable spacer includes a body part covered on the side of the sound-generating unit away from the bottom shell, an extension part bent and extended from the periphery of the body part toward the bottom shell; The extension portion extends away from the sounding unit and is fixed to the fixing portion of the blocking wall; the body portion is in contact with the support rib.
The loudspeaker module according to claim 2, wherein the sound-generating unit includes a vibration system and a magnetic circuit system for driving the vibration system to vibrate, and the air-permeable spacer covers the sound-generating unit and is close to the magnetic One side of the circuit system, the magnetic circuit system includes a magnetic bowl spaced apart from the vibration system, and the support rib is arranged on a side of the magnetic bowl close to the air-permeable spacer.
The speaker module according to claim 3, wherein there are a plurality of the support ribs, and the plurality of the support ribs are arranged on the magnetic bowl at intervals.
The loudspeaker module according to claim 3, wherein the bottom case comprises a bottom wall and a side wall extending from a periphery of the bottom wall toward the cover, and the blocking wall extends from the bottom wall extending toward the cover and located on the side of the side wall close to the sound-emitting unit, the side of the retaining wall facing away from the side wall is recessed toward the side wall to form a support step, and the vibration system Abutting on the support step, the fixing part is fixed on one end of the blocking wall close to the cover body.
The loudspeaker module according to claim 5, wherein the vibration system comprises a diaphragm opposite to the magnetic bowl and facing the bottom wall, the diaphragm and the bottom wall are spaced apart to form a front acoustic cavity and a sound outlet channel connecting the front sound cavity and the outside is formed through the side wall.
The speaker module according to any one of claims 1-6, wherein the bracket, the air-permeable spacer and the cover are enclosed to form the sound-absorbing cavity, and the sound-absorbing cavity and the The accommodating cavities are arranged side by side, and the sound absorbing cavity is filled with sound absorbing material.
The speaker module according to any one of claims 7, wherein an injection hole is formed on the cover and/or the bracket, the injection hole communicates with the sound-absorbing cavity, and the sound-absorbing material It is injected into the sound-absorbing cavity through the injection hole.
The speaker module according to claim 1, wherein a leakage hole is formed on the cover and/or the bracket, the leakage hole communicates with the sound-absorbing cavity, and the sound-emitting unit is provided with a leakage hole. part, the sound-generating unit is communicated with the leakage hole through the leakage part, the air-permeable spacer and the sound-absorbing cavity in sequence.
The speaker module according to claim 9, wherein the sound generating unit comprises a basin frame, a vibration system and a magnetic circuit system fixed and supported on the basin frame, the magnetic circuit system comprising a magnetic bowl, the The magnetic bowl is at least partially spaced from the basin frame to form the leakage portion.