CN216146418U

CN216146418U - Miniature speaker module

Info

Publication number: CN216146418U
Application number: CN202122006116.4U
Authority: CN
Inventors: 林嘉平; 董庆宾
Original assignee: Xinwei Shenzhen Acoustic Technology Co ltd
Current assignee: Shenzhen Weishi Acoustics Co Ltd
Priority date: 2021-08-24
Filing date: 2021-08-24
Publication date: 2022-03-29
Anticipated expiration: 2031-08-24

Abstract

The utility model discloses a micro loudspeaker module, which comprises a shell and a pressure relief assembly, wherein only a leakage hole is formed in the outer surface of the shell and is used for filling sound-absorbing materials, the pressure relief assembly is used for being adhered to the leakage hole after the sound-absorbing materials are filled, the pressure relief assembly comprises a breathable isolating piece, an adhering piece and a cover plate which are adhered in sequence, a first through hole is formed in the cover plate, a second through hole matched with the first through hole is formed in the adhering piece, and the aperture of the first through hole is smaller than that of the leakage hole; the bonding area of the bonding piece is larger than the cross sectional area of the breathable isolation assembly and/or the cross sectional area of the cover plate, and the pressure relief assembly is bonded with the shell through the bonding piece; the bonding area that sets up the bonding piece is greater than ventilative isolation component's cross sectional area and/or the cross sectional area of apron, and the bonding piece both had been used for bonding ventilative isolation component and apron, still was used for gluing pressure release component to the casing simultaneously on, has reduced pressure release component's thickness, has simplified production technology.

Description

Miniature speaker module

Technical Field

The utility model relates to the technical field of acoustic devices, in particular to a micro loudspeaker module.

Background

With the wide application of the smart mobile terminal, a sound generating device for playing sound is also widely used. The sound generating device is at the during operation, and its inside produces a large amount of heats, can make the gas expansion atmospheric pressure in the back intracavity rise to lead to the atmospheric pressure imbalance in front chamber and the back chamber, influence sound generating device's normal work, in order to make sound generating device can normally work, need set up leakage hole on the casing that corresponds with the back chamber usually, and set up ventilative separator on leaking the hole and carry out the closing cap to it. In addition, in order to make the sound generating device obtain better audio effect, the rear cavity part of the sound generating device is filled with sound absorbing particles, and correspondingly, a powder filling hole for filling the sound absorbing particles is also formed in the shell corresponding to the rear cavity, and a cover plate for sealing the powder filling hole is arranged.

The existing sounding device needs to be provided with a leakage hole and a powder filling hole, and is provided with a breathable isolating piece for sealing the leakage hole and a cover plate for sealing the powder filling hole, so that the structure is complex and the process flow is complicated; in order to solve the above problems, chinese utility model patent No. CN211909048U discloses a speaker, which comprises a lower casing and a pressure relief assembly, wherein the outer surface of the lower casing is only provided with a leakage hole for filling sound-absorbing material, the pressure relief assembly is used for adhering to the leakage hole after the sound-absorbing material is filled, and the pressure relief assembly comprises a damping mesh cloth, a first double-sided adhesive, a PET and a second double-sided adhesive which are sequentially adhered from top to bottom; the leakage hole and the powder filling hole are integrated, so that the filling of sound-absorbing materials can be met, and the ventilation and pressure relief effects can be achieved; however, the structure of the pressure relief assembly is thick and heavy, and the pressure relief assembly does not conform to the development trend of miniaturization of electronic products; and in actual production process, PET's one side bonds in damping screen cloth through first double faced adhesive tape, and PET's opposite side bonds to the casing surface down through second double faced adhesive tape, and the process is loaded down with trivial details, is unfavorable for production efficiency's promotion.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is as follows: a micro speaker module is provided to simplify an assembly process and reduce the overall thickness of the speaker module.

In order to solve the technical problems, the utility model adopts the technical scheme that: a micro loudspeaker module comprises a shell and a pressure relief assembly, wherein only leakage holes are formed in the outer surface of the shell and used for filling sound-absorbing materials, the pressure relief assembly is used for being pasted to the leakage holes after the sound-absorbing materials are filled, the pressure relief assembly comprises a breathable isolating piece, an adhering piece and a cover plate which are sequentially adhered, a first through hole is formed in the cover plate, a second through hole matched with the first through hole is formed in the adhering piece, and the aperture of the first through hole is smaller than that of the leakage holes; the bonding area of the bonding piece is larger than the cross sectional area of the breathable isolation assembly and/or the cross sectional area of the cover plate, and the pressure relief assembly is bonded with the shell through the bonding piece.

Furthermore, the shape of the cover plate is matched with that of the leakage hole, and the cover plate is positioned in the leakage hole.

Further, the leakage hole, the first through hole and the second through hole are coaxially arranged.

Further, the pressure relief assembly is circular.

Further, the surface of the shell is provided with a sinking groove, the leakage hole is formed in the sinking groove, and the appearance of the sinking groove is matched with that of the pressure relief assembly.

Further, the apron contradict in the surface of casing cover in let on the leakage hole, bonding groove has been seted up to one side of bonding piece, the apron bond in the bonding groove.

Further, the breathable isolation component is any one of non-woven fabrics, nylon woven meshes, wool woven meshes, metal meshes and tone tuning paper.

Further, the cover plate is a panel made of any one of polyethylene terephthalate, polycarbonate, polypropylene or acrylonitrile-butadiene-styrene.

The utility model has the beneficial effects that: the miniature loudspeaker module provided by the utility model has the characteristics of simple production process and compact structure, the bonding area of the bonding piece is larger than the cross sectional area of the ventilating isolation assembly and/or the cross sectional area of the cover plate, and the bonding piece is used for bonding the ventilating isolation assembly and the cover plate and simultaneously bonding the pressure relief assembly to the shell, so that the thickness of the pressure relief assembly is reduced, and the production process is simplified.

Drawings

Fig. 1 is an exploded view of a micro-speaker module according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a micro speaker module according to a first embodiment of the utility model;

fig. 3 is a schematic cross-sectional view of a micro speaker module according to a first embodiment of the utility model;

FIG. 4 is a detail view at A of FIG. 3;

fig. 5 is a schematic partial cross-sectional view of a micro speaker module according to a second embodiment of the utility model.

Description of reference numerals:

1. a housing; 11. an upper shell; 111. a leak hole; 112. sinking a groove; 12. a lower case; 121. a front cavity; 122. a rear cavity; 13. a sounding monomer; 2. a pressure relief assembly; 21. a breathable barrier; 22. an adhesive member; 221. a second through hole; 23. a cover plate; 231. a first via.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 5, a micro speaker module includes a housing 1 and a pressure relief assembly 2, where only a leakage hole 111 is formed in an outer surface of the housing 1, the leakage hole 111 is used for filling sound-absorbing material, the pressure relief assembly 2 is used for adhering to the leakage hole 111 after the sound-absorbing material is filled, the pressure relief assembly 2 includes a breathable isolation member 21, an adhesion member 22 and a cover plate 23 which are sequentially adhered, a first through hole 231 is formed in the cover plate 23, a second through hole 221 adapted to the first through hole 231 is formed in the adhesion member 22, and a hole diameter of the first through hole 231 is smaller than a hole diameter of the leakage hole 111; the bonding area of the bonding piece 22 is larger than the cross-sectional area of the breathable isolation component and/or the cross-sectional area of the cover plate 23, and the pressure relief component 2 is bonded with the shell 1 through the bonding piece 22.

From the above description, the beneficial effects of the present invention are: the bonding area of the bonding piece 22 is larger than the cross sectional area of the breathable isolation assembly and/or the cross sectional area of the cover plate 23, the bonding piece 22 is used for bonding the breathable isolation assembly and the cover plate 23, and meanwhile, the pressure relief assembly 2 is bonded to the shell 1, the thickness of the pressure relief assembly 2 is reduced, and the production process is simplified.

Further, the shape of the cover plate 23 is matched with the shape of the leakage hole 111, and the cover plate 23 is located in the leakage hole 111.

As can be seen from the above description, the cover plate 23 is disposed in the leakage hole and covers the leakage hole 111, so as to facilitate the improvement of the structural compactness, and meanwhile, the cover plate 23 can also play a role in positioning for the assembly of the pressure relief assembly 2.

Further, the leakage hole 111, the first through hole 231, and the second through hole 221 are coaxially disposed.

As can be seen from the above description, the leakage hole 111, the first through hole 231, and the second through hole 221 are coaxially disposed, so as to facilitate gas circulation.

Further, the pressure relief assembly 2 is circular.

As can be seen from the above description, the shape of the pressure relief assembly 2 can be set according to the actual application requirements.

Further, a sunk groove 112 is formed in the surface of the shell 1, the leakage hole 111 is formed in the sunk groove 112, and the shape of the sunk groove 112 is matched with that of the pressure relief assembly 2.

As can be seen from the above description, the arrangement of the sinking groove 112 enables the pressure relief assembly 2 to be quickly positioned during assembly, thereby improving the assembly efficiency of the pressure relief assembly 2; secondly, also can avoid pressure release subassembly 2 outstanding casing 1 surface, avoid external reason to cause pressure release subassembly 2 to drop, improve the durability of pressure release subassembly 2 in the use.

Further, the cover plate 23 abuts against the outer surface of the shell 1 and covers the leakage hole 111, a bonding groove is formed in one side of the bonding piece 22, and the cover plate 23 is bonded in the bonding groove.

As can be seen from the above description, the bonding groove facilitates bonding of the cover plate 23, and can accommodate the cover plate 23, thereby improving the compactness of the structure.

According to the description, the non-woven fabric, the nylon woven mesh, the wool woven mesh, the metal mesh and the tone tuning paper have certain sound resistance characteristics, and can be used for adjusting the gas leakage amount so as to meet the acoustic performance requirement of the micro loudspeaker module.

Further, the cover plate 23 is a panel made of any one material selected from polyethylene terephthalate, polycarbonate, polypropylene, and acrylonitrile butadiene styrene.

As can be seen from the above description, the material of the cover plate 23 can be selected according to the actual application requirement.

Example one

Referring to fig. 1 to 4, a first embodiment of the present invention is: a micro speaker module comprises a shell 1 and a pressure relief assembly 2, wherein only a leakage hole 111 is formed in the outer surface of the shell 1, the leakage hole 111 is used for filling sound-absorbing materials, the pressure relief assembly 2 is used for being adhered to the leakage hole 111 after the sound-absorbing materials are filled, the pressure relief assembly 2 comprises a breathable isolating piece 21, an adhering piece 22 and a cover plate 23 which are adhered in sequence, a first through hole 231 is formed in the cover plate 23, a second through hole 221 matched with the first through hole 231 is formed in the adhering piece 22, and the aperture of the first through hole 231 is equal to that of the second through hole 221; the aperture of the first through hole 231 is smaller than that of the leakage hole 111; the bonding area of the bonding piece 22 is larger than the cross-sectional area of the breathable isolation component and/or the cross-sectional area of the cover plate 23, and the pressure relief component 2 is bonded with the shell 1 through the bonding piece 22; in this embodiment, the adhesive member 22 is a double-sided tape.

Specifically, please refer to fig. 1 and fig. 2, the casing 1 includes an upper casing 11, a lower casing 12 and a sound generating unit 13, the sound generating unit 13 is installed on the lower casing 12, a front cavity 121 is formed between a sound generating part of the sound generating unit 13 and the bottom of the lower casing 12, a rear cavity 122 is formed between the upper casing 11, the sound generating unit 13 and the lower casing 12, sound absorbing particles are filled in the rear cavity 122, and the leakage hole 111 is communicated with the rear cavity 122; more specifically, sound-absorbing particles are filled into the rear cavity 122 through the leakage hole 111 before the pressure relief assembly 2 closes the leakage hole 111, and the leakage hole 111 is closed through the pressure relief assembly 2 after filling.

Optionally, the pressure relief assembly 2 is of a stacked structure, and one side of the pressure relief assembly 2, where the cover plate 23 is bonded to the bonding member 22, is bonded to the housing 1 (as in this embodiment), at this time, the bonding area of the bonding member 22 needs to be larger than the cross-sectional area of the cover plate 23; alternatively, the pressure relief assembly 2 may be bonded to the housing 1 by bonding the side of the air-permeable partition 21 to the bonding member 22, and at this time, the bonding area of the bonding member 22 needs to be larger than the cross-sectional area of the air-permeable partition 21.

Referring to fig. 4, in this embodiment, the cover plate 23 abuts against the outer surface of the housing 1 and covers the leakage hole 111, a bonding groove is formed on one side of the bonding member 22, and the cover plate 23 is bonded in the bonding groove, so that the cover plate 23 is accommodated and bonded, and the structure compactness is improved; specifically, the adhesive piece 22 is adhered to the outer surface of the case 1 at a portion of the adhering surface on the side to which the cover plate 23 is adhered, excluding the adhering groove.

Preferably, the leakage hole 111, the first through hole 231 and the second through hole 221 are coaxially arranged, so as to facilitate the gas in the rear cavity 122 to flow to the outside of the housing 1.

Preferably, the pressure relief assembly 2 is circular, so that the molding is convenient; specifically, a sinking groove 112 is formed in the surface of the housing 1, the leakage hole 111 is formed in the sinking groove 112, the shape of the sinking groove 112 is matched with the shape of the pressure relief assembly 2, and the arrangement of the sinking groove 112 enables the pressure relief assembly 2 to be quickly positioned during assembly, so that the assembly efficiency of the pressure relief assembly 2 is improved; secondly, also can avoid pressure release subassembly 2 outstanding casing 1 surface, avoid external reason to cause pressure release subassembly 2 to drop, improve the durability of pressure release subassembly 2 in the use.

Optionally, ventilative isolation component is any one of non-woven fabrics, nylon woven mesh, wool woven mesh, metal mesh and tuning paper, and what understand easily, non-woven fabrics, nylon woven mesh, wool woven mesh, metal mesh and tuning paper all have certain acoustic resistance characteristic, can be used for adjusting the gas leakage volume to satisfy the acoustic performance requirement of miniature speaker module.

Optionally, the cover plate 23 is a panel made of any one of polyethylene terephthalate, polycarbonate, polypropylene, or acrylonitrile butadiene styrene, and the material of the cover plate 23 may be specifically selected according to actual application requirements.

Example two

Referring to fig. 5, the second embodiment of the present invention is a further improvement of the pressure relief assembly 2 on the basis of the first embodiment, and is different from the first embodiment in that: the shape of the cover plate 23 is matched with that of the leakage hole 111, and the cover plate 23 is positioned in the leakage hole 111; specifically, the appearance of apron 23 and let out the shape of leakage hole 111 and be circular, the edge of apron 23 contradict in let out the inside wall of leakage hole 111, apron 23 set up in it is downthehole and right let out leakage hole 111 and carry out the closing cap, do benefit to compact structure's promotion, simultaneously, apron 23 can also be for the effect of location is played in the assembly of pressure release subassembly 2.

In summary, the micro speaker module provided by the utility model has the characteristics of simple production process and compact structure, the bonding area of the bonding piece is larger than the cross sectional area of the breathable isolation assembly and/or the cross sectional area of the cover plate, and the bonding piece is used for bonding the breathable isolation assembly and the cover plate and bonding the pressure relief assembly to the shell, so that the thickness of the pressure relief assembly is reduced, and the production process is simplified; the apron sets up in the leakage hole and carries out the closing cap to the leakage hole, does benefit to the promotion of compact structure nature, and simultaneously, the apron can also play the effect of location for the assembly of pressure release subassembly.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims

1. A micro speaker module comprises a shell and a pressure relief assembly, wherein the outer surface of the shell is only provided with a leakage hole, the leakage hole is used for filling sound-absorbing materials, the pressure relief assembly is used for being pasted to the leakage hole after the sound-absorbing materials are filled, and the pressure relief assembly is characterized by comprising a breathable isolating piece, a bonding piece and a cover plate which are sequentially bonded, a first through hole is formed in the cover plate, a second through hole matched with the first through hole is formed in the bonding piece, and the aperture of the first through hole is smaller than that of the leakage hole; the bonding area of the bonding piece is larger than the cross sectional area of the breathable isolation assembly and/or the cross sectional area of the cover plate, and the pressure relief assembly is bonded with the shell through the bonding piece.

2. The micro-speaker module as recited in claim 1, wherein the shape of the cover plate is adapted to the shape of the leak hole, the cover plate being located within the leak hole.

3. The micro-speaker module of claim 1, wherein the leak hole, the first through hole, and the second through hole are coaxially disposed.

4. The micro-speaker module of claim 1, wherein the pressure relief assembly is circular.

5. The micro-speaker module as claimed in claim 4, wherein a sink is disposed on the surface of the housing, the leakage hole is disposed in the sink, and the sink has an outer shape matching the outer shape of the pressure relief assembly.

6. The module of claim 1, wherein the cover plate abuts against the outer surface of the housing and covers the leakage hole, one side of the adhesive member defines an adhesive groove, and the cover plate is adhered to the adhesive groove.

7. The micro-speaker module as claimed in any one of claims 1 to 6, wherein the air permeable isolation member is any one of a non-woven fabric, a nylon woven fabric, a wool woven fabric, a metal mesh and a tuning paper.

8. The micro-speaker module as claimed in any one of claims 1 to 6, wherein the cover is a panel comprising any one of polyethylene terephthalate, polycarbonate, polypropylene or acrylonitrile butadiene styrene.