CN111954128A

CN111954128A - Loudspeaker module and electronic equipment

Info

Publication number: CN111954128A
Application number: CN202010786457.5A
Authority: CN
Inventors: 李兆鹏; 陈国强
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-11-17
Anticipated expiration: 2040-08-07
Also published as: CN111954128B

Abstract

The invention discloses a loudspeaker module, which comprises a shell with an accommodating cavity and a sounding unit accommodated in the accommodating cavity, wherein the sounding unit divides the accommodating cavity into a front cavity and a rear cavity; the shell comprises a lower shell and an upper shell, the upper shell comprises a first body part and a first partition wall protruding from the first body part, the lower shell comprises a second body part and a second partition wall protruding from the second body part, the first partition wall and the second partition wall are inserted in a butt joint mode to divide the rear cavity into a first rear cavity and a second rear cavity, and sound-absorbing particles are filled in the second rear cavity; and a ventilating isolation channel is formed between the end surfaces of the first isolation wall and the second isolation wall, and the width of the ventilating isolation channel is smaller than the diameter of the sound-absorbing particles. The processing and assembly of the isolation assembly in the traditional design are omitted, the manufacturing process is simpler, and the processing cost is reduced; the assembly process is reduced, the difficulty is reduced, and the assembly efficiency and the yield are obviously improved.

Description

Loudspeaker module and electronic equipment

Technical Field

The invention relates to the technical field of electroacoustic conversion, in particular to a loudspeaker module and electronic equipment.

Background

Along with the social and economic development and the consumer upgrade, consumers put forward higher requirements on the tone quality of electronic equipment, and more space is needed for designing the sound cavity of the loudspeaker module, but the contradiction is that the consumer has higher and higher requirements on the portability of some electronic equipment, the expansion of the space of the sound cavity is limited, and even the space needs to be further compressed.

In order to enlarge the volume of the sound cavity, reduce the low frequency of the module and expand the bandwidth, the sound-absorbing particles can be filled in the cavity behind the module, in order to avoid the sound-absorbing particles to enter the loudspeaker unit, the sound-absorbing particles and the loudspeaker unit are isolated by the isolating component, and the equivalent volume of the back cavity is improved under the condition that the physical volume of the sound cavity is not enlarged. However, the isolation assembly is made of the isolation net and the isolation frame through an insert injection molding method, and when the isolation net is used as an insert and is injection molded with the isolation frame, on one hand, the process is complex, the mold cost is high, the yield is low, on the other hand, the assembly process is complicated, and the efficiency is low.

Disclosure of Invention

The invention aims to provide a loudspeaker module which is simple in manufacturing process and efficient in assembly.

In order to achieve the purpose, the loudspeaker module provided by the invention comprises a shell with an accommodating cavity and a sound production unit accommodated in the accommodating cavity, wherein the sound production unit divides the accommodating cavity into a front cavity and a rear cavity;

the shell comprises a lower shell and an upper shell covered on the lower shell, the upper shell comprises a first body part and a first partition wall protruding from the surface of the first body part facing the sound generating unit and used for partitioning the rear cavity, and the lower shell comprises a second body part and a second partition wall protruding from the surface of the second body part facing the sound generating unit and arranged at a corresponding position with the first partition wall;

the first partition wall and the second partition wall are inserted in a butt joint mode, the rear cavity is divided into a first rear cavity and a second rear cavity, and sound-absorbing particles are filled in the second rear cavity;

and a ventilating isolation channel is formed between the end surfaces of the first isolation wall and the second isolation wall, and the width of the ventilating isolation channel is smaller than the diameter of the sound-absorbing particles.

Optionally, the end surface of the first partition wall is provided with a plurality of first protruding structures and a plurality of first recessed structures;

a plurality of second protruding structures and a plurality of second recessed structures are arranged on the end face of the second partition wall;

the first protruding structure is inserted into the second recessed structure with a gap therebetween, and the second protruding structure is inserted into the first recessed structure with a gap therebetween.

Optionally, the shape of the air-permeable isolation channel is a broken line, a curve or a combination of a straight line and a curve.

Optionally, the shape of the air-permeable isolation channel is one of a trapezoidal waveform, a square waveform, a triangular waveform, a sawtooth waveform, a stepped waveform and a wave shape.

Optionally, the epitheca still includes the filling opening that corresponds to the position setting of cavity behind the second to and the lid is located the apron of filling opening, the filling opening be used for to cavity is filled behind the second the sound granule is inhaled to the intussuseption.

Optionally, the cover plate is made of any one of PET, steel sheet and plastic sheet.

Optionally, the sound absorbing particles are a mixture of one or more of natural zeolite powder, white carbon black, and activated carbon.

Optionally, the first body portion and the first partition wall are an integrally formed structure, and the second body portion and the second partition wall are an integrally formed structure.

Optionally, the first partition wall and the second partition wall extend linearly, curvilinearly, or zigzag in the horizontal direction.

The invention further provides electronic equipment which comprises the loudspeaker module.

According to the loudspeaker module, the first isolation wall is arranged on the upper shell, the second isolation wall is arranged on the lower shell, the first isolation wall and the second isolation wall are inserted in a butt joint mode to achieve isolation of the rear cavity filling area together, the breathable isolation channel is formed between the end faces of the first isolation wall and the second isolation wall, so that gas circulation between the first rear cavity and the second rear cavity is achieved, the width of the isolation channel is smaller than the diameter of the sound absorption particles, and the sound absorption particles are packaged in the filling area while the breathable communication effect is guaranteed. The processing and the assembly of the isolation assembly in the traditional design are omitted, on one hand, the manufacturing process is simple, the processing cost is reduced, the yield is improved, on the other hand, the assembly procedures are reduced, the difficulty is reduced, and the assembly efficiency is obviously improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a speaker module according to an embodiment of the present invention.

Fig. 2 is a partial perspective view of a speaker module according to one embodiment of the present invention.

Fig. 3 is a cross-sectional view of a speaker module in accordance with one embodiment of the present invention.

Fig. 4 is another cross-sectional view of a speaker module in accordance with one embodiment of the present invention.

Description of reference numerals:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Outer casing	1221	Second bump structure
11	Upper casing	1222	Second concave structure
				111	First body part	13	Sound outlet
112	First partition wall	2	Sound production unit
				1121	First bump structure	3	Containing cavity
1122	First concave structure	31	Front cavity
				113	Filling opening	32	Rear cavity
114	Cover plate	321	First rear cavity
				12	Lower casing	322	Second rear cavity
121	Second body part	4	Ventilating isolation channel
				122	Second partition wall

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In an embodiment of the present invention, please refer to fig. 1 to 4 in combination, the speaker module includes a housing 1 and a sound unit 2, the housing 1 has an accommodating cavity 3, and the sound unit 2 is disposed in the accommodating cavity 3 and divides the accommodating cavity 3 into a front cavity 31 and a rear cavity 32.

The sound generating unit 2 comprises a vibration system, a magnetic circuit system and a shell; the housing 1 includes a lower shell 12 and an upper shell 11 covering the lower shell 12, the two together form an accommodating cavity 3, and a sound outlet 13 communicating the front cavity 31 and the exterior of the speaker module is provided.

The upper case 11 includes a first body 111 and a first partition wall 112, and the first partition wall 112 is protruded on a surface of the first body 111 facing the sound generating unit 2; the lower case 12 includes a second body portion 121 and a second partition wall 122, the second partition wall 122 is protruded from a surface of the second body portion 121 facing the sound emitting unit 2, and the second partition wall 122 is located at the same position as the first partition wall 112 in the horizontal direction. Therefore, the first partition wall 112 is inserted into the second partition wall 122 in a butt joint manner, so as to divide the rear cavity 32 of the speaker module into the first rear cavity 321 and the second rear cavity 322, and sound absorption particles are filled in the second rear cavity 322, so that the equivalent volume of the rear cavity 32 is improved, the low frequency of the module is reduced, the bandwidth is expanded, and the tone quality is improved.

Form ventilative isolation passageway 4 between the terminal surface of first bulkhead 112 and second bulkhead 122, ventilative isolation passageway 4's width is less than the diameter of the sound granule of inhaling that fills in second rear chamber 322, guarantees to breathe freely when the intercommunication effect will inhale the sound granule encapsulation in second rear chamber 322, prevents to inhale the sound granule and get into first rear chamber 321 from ventilative isolation passageway 4, and then get into sound generating unit 2. Keep apart the second back cavity 322 that is used for filling the sound granule of inhaling through first division wall 112 and second division wall 122 with back cavity 32, saved the processing and the assembly of isolation subassembly in traditional design, the preparation technology is comparatively simple, has reduced the processing cost, has improved the yields, and on the other hand assembly process reduces, the degree of difficulty reduces, and assembly efficiency is showing and is improving.

Further, a plurality of first protruding structures 1121 and a plurality of first recessed structures 1122 are disposed on the end surface of the first isolation wall 112, and a plurality of second protruding structures 1221 and a plurality of second recessed structures 1222 are disposed on the end surface of the second isolation wall 122. When the air-permeable isolating passage 4 is assembled, the first isolating wall 112 and the second isolating wall 122 are inserted in a butt joint manner, the first protruding structure 1121 is inserted into the second recessed structure 1222 with a gap therebetween, the second protruding structure 1221 is inserted into the first recessed structure 1122 with a gap therebetween, and a plurality of gaps are formed together.

In the technical solution of the present invention, as shown in fig. 4, the shape of the air-permeable isolation channel 4 is a broken line, specifically, the shape of the air-permeable isolation channel 4 is a trapezoidal waveform. In other use occasions, as long as the functions of ventilation and isolation can be realized, the shape of the ventilation isolation channel 4 can also be set to other broken lines, curved lines or a combination of straight lines and curved lines, and specifically can be one of square waveforms, triangular waveforms, sawtooth waveforms, step waveforms and wave shapes. In the very narrow and small use occasion in design space, ventilative isolating passageway 4's shape also can be a straight line, and this kind of design no longer needs first bulkhead 112 and second bulkhead 122 butt joint to insert, but because ventilative isolating passageway 4's effective area reduces, and is limited to the ventilative intercommunication effect of first back chamber 321 and second back chamber 322, consequently also relatively poor to the promotion effect of tone quality.

In the technical scheme of the invention, the upper shell 11 is provided with the filling port 113 at a position corresponding to the second rear cavity 322, the upper shell 11 further comprises a cover plate 114 covering the filling port 113, the filling port 113 connects the second rear cavity 322 with the exterior of the loudspeaker module, the filling port 113 fills sound-absorbing particles into the second rear cavity 322, and the cover plate 114 is bonded and fixed on the filling port 113 after the filling is finished. Specifically, the material of the cover plate 114 is PET, and the sound-absorbing particles are a mixture of one or more of natural zeolite powder, white carbon black and activated carbon. In other applications, the cover plate 114 may be made of a steel sheet or plastic sheet, and the sound-absorbing particles may be made of other materials capable of absorbing sound.

In the present invention, the upper case 11 is made of plastic, and the first body 111 and the first isolation wall 112 are integrally formed by injection molding. In other use occasions, a 3D printing method may be adopted, or when the upper shell 11 is made of a metal material, one of machining, casting, metal injection molding and 3D printing may be adopted.

Similarly, the lower shell 12 is made of plastic, and the second body portion 121 and the second isolation wall 122 are an integral injection molding structure. In other use occasions, a 3D printing method may be adopted, or when the lower shell 12 is made of metal, one of machining, casting, metal injection molding and 3D printing may be adopted. Through the method of integrated into one piece processing, overall structure is simpler, has left out the process that isolation subassembly itself assembled and fixed with the casing in traditional design, has avoided insert injection moulding structure complicacy, yielding, the high shortcoming of defective index simultaneously, has saved material cost and human cost.

It should be noted that the present invention is not limited thereto, and in other embodiments, the housing 1 may also be manufactured by other methods, which are not described in detail herein.

In the technical scheme of the invention, the first partition wall 112 and the second partition wall 122 extend linearly in the horizontal direction, and the surfaces of the first partition wall 112 and the second partition wall 122 are both planes, so that the structure is simple, the processing difficulty is low, and the structural stability and the reliability are good. In other use occasions, first bulkhead 112 and second bulkhead 122 can be the curve extension in the horizontal direction, and the surface of first bulkhead 112 and second bulkhead 122 is the curved surface, and this kind of structure has taken up more spaces that the sound granule was inhaled in the filling, and has required for the intensity of material higher, but has increased ventilative effective area who keeps apart passageway 4, has improved the utilization efficiency who inhales the sound granule, and is better to the promotion effect of tone quality. In another use occasion, the first partition wall 112 and the second partition wall 122 extend along a broken line in the horizontal direction, and compared with a scheme of extending along a straight line or a curve, the structure has better reliability and stability, occupies smaller space for filling and absorbing sound particles, has larger effective area of the ventilating partition passage 4 and better effect of improving the tone quality; for an irregular structure of the accommodating cavity 3, the reasonable design of the filling space can be realized according to the specific shape of the space of the rear cavity 32 in a mode of extending through the folding line.

The present invention further provides an electronic device, which includes the speaker module described above, and the specific structure of the speaker module refers to the foregoing embodiments, and since the electronic device adopts all technical solutions of all the foregoing embodiments, the electronic device at least has all beneficial effects brought by the technical solutions of the foregoing embodiments, and details are not repeated herein.

Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A loudspeaker module comprises a shell with an accommodating cavity and a sound production unit accommodated in the accommodating cavity, wherein the sound production unit divides the accommodating cavity into a front cavity and a rear cavity;

it is characterized in that the preparation method is characterized in that,

2. The loudspeaker module as recited in claim 1, wherein a plurality of first raised structures and a plurality of first recessed structures are disposed on the end surface of the first partition wall;

3. A loudspeaker module according to claim 1, wherein the air-permeable isolation channel is shaped as a broken line, a curved line or a combination of a straight line and a curved line.

4. The speaker module as claimed in claim 3, wherein the shape of the air-permeable isolation channel is one of a trapezoidal waveform, a square waveform, a triangular waveform, a sawtooth waveform, a step waveform, and a wave shape.

5. The speaker module as claimed in claim 1, wherein the top case further comprises a filling opening corresponding to the second rear cavity, and a cover plate covering the filling opening, and the filling opening is used for filling the sound-absorbing particles into the second rear cavity.

6. The speaker module as claimed in claim 5, wherein the cover plate is made of any one of PET, steel sheet and plastic sheet.

7. The speaker module of claim 1, wherein the sound absorbing particles are a mixture of one or more of natural zeolite powder, white carbon black, and activated carbon.

8. The speaker module as claimed in claim 1, wherein the first body portion and the first partition wall are integrally formed, and the second body portion and the second partition wall are integrally formed.

9. The speaker module as claimed in claim 1, wherein the first partition wall and the second partition wall extend linearly, curvilinearly or in a zigzag line in a horizontal direction.

10. An electronic device comprising a speaker module according to any one of claims 1 to 9.