CN216599975U

CN216599975U - Structure for improving microphone isolation tightness

Info

Publication number: CN216599975U
Application number: CN202123417298.0U
Authority: CN
Inventors: 张礼友; 黄少敏; 谢杨飞
Original assignee: Dongguan Tianyi Acoustic Technology Co ltd
Current assignee: Dongguan Tianyi Acoustic Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-05-24
Anticipated expiration: 2031-12-31

Abstract

The utility model discloses a structure for improving the isolation and sealing performance of a microphone, which comprises a shell, a PCB and an isolation mechanism, wherein an upper shell and a lower shell of the shell are mutually assembled to form a closed inner cavity; the PCB is arranged in the cavity through a fixing element; and the PCB is electrically connected with a microphone. The isolation mechanism comprises an isolation enclosing wall and a silica gel sleeve, the silica gel sleeve and the isolation enclosing wall sequentially surround the microphone to form double-layer isolation sealing, and insulating silica gel bodies are filled among gaps where the silica gel sleeve and the isolation enclosing wall are in contact with the PCB; a single sound recording hole is formed through the housing and the isolation mechanism, so that the sound pickup portion of the microphone is communicated with the outside. This device adopts double-deck isolation sealed, and the peripheral isolation leakproofness that adds sealed glue of silica gel cover device can effectively be strengthened, makes the isolation leakproofness of product more stable.

Description

Structure for improving microphone isolation tightness

Technical Field

The utility model belongs to the technical field of the sealing device is kept apart to acoustic structure and specifically relates to indicate a structure that improves microphone isolation leakproofness.

Background

Microphone structure on the existing market adopts the individual layer silica gel cover basically to seal, and this technology leakproofness is low, the isolation is weak, the technical scheme of the utility model, adopt double-deck isolation, the leakproofness is high, the isolation is strong, can effectively improve the low and poor scheduling problem of isolation of leakproofness.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides a structure for improving the sealing performance of microphone isolation, which employs double-layer isolation seal to effectively improve the problems of weak single-layer isolation and low sealing performance in the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a structure for improving microphone isolation and sealing performance comprises

The shell comprises an upper shell and a lower shell, and the upper shell and the lower shell are assembled with each other to form a closed inner cavity;

the PCB board is arranged in the cavity through a fixing element; the PCB is electrically connected with a microphone;

the isolation mechanism comprises an isolation enclosure wall and a silica gel sleeve, the silica gel sleeve and the isolation enclosure wall sequentially surround the microphone to form double-layer isolation seal, and insulating silica gel bodies are filled among gaps where the silica gel sleeve and the isolation enclosure wall are in contact with the PCB;

a single sound recording hole is formed through the housing and the isolation mechanism, so that the sound pickup portion of the microphone is communicated with the outside.

Preferably, the isolation enclosing wall is integrally formed on the lower shell, is a fully-enclosed structure integrally extending from the inner wall surface of the lower shell, and is provided with a first enclosing wall, a second enclosing wall, a third enclosing wall and a fourth enclosing wall which form quadrangles; the enclosing walls are sequentially connected end to end in the lower shell to form a first enclosing cavity with a first open opening.

Preferably, the lower shell is provided with a first through hole, and the first through hole penetrates through the first surrounding cavity and the outer side of the shell.

Preferably, the silica gel sleeve is of a full-surrounding structure and is provided with an integrated bottom surface, a first side surface, a second side surface, a third side surface and a fourth side surface, the bottom surface and the side surfaces are sequentially connected to form a second open hole and a second surrounding cavity, the silica gel sleeve is integrally placed in the first surrounding cavity, and the first open hole and the second open hole are in the same direction.

Preferably, the isolation enclosing wall and the silica gel cover the outside of the microphone, the first open port and the second open port face the PCB, and gaps among the first open port, the second open port and the PCB are sealed by filling an insulating silica gel body.

Preferably, the silica gel sleeve is provided with a second through hole, the second through hole is opposite to the first through hole, and a recording hole which is only communicated with the microphone and the outside is formed.

Preferably, the upper shell and the lower shell are buckled with each other, or welded or bonded to form a sealed inner cavity.

Preferably, the fixing element is a screw.

Preferably, the lower case has a fixing boss with a screw hole, and the screw is tightly fitted to the screw hole after passing through the fixing hole on the PCB.

Preferably, there is not a clearance tight fit between the periphery of microphone and the silica gel cover, there is not a clearance tight fit between silica gel cover and the isolation bounding wall, the bottom surfaces of silica gel cover, isolation bounding wall, microphone all with no clearance tight fit of PCB board.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme, the isolation principle of a structure that improves microphone isolation leakproofness is: covering a first layer of isolation outside the microphone by using a silica gel sleeve; and then covering the silica gel sleeve with an isolation wall to form a second layer of isolation. Particularly, because the isolation fence is integrated with the shell, no gap exists between the isolation fence and the shell (particularly the lower shell), and the isolation effect is further improved. And moreover, the gaps among the silica gel sleeve, the isolation enclosing wall and the PCB are filled with insulating silica gel bodies, so that any gap possibly existing is blocked. Finally, because the upper shell and the lower shell are sealed, only one sound recording hole can communicate the sound pickup part of the microphone with the outside, and the isolation and the sealing performance of the product are more stable.

To illustrate the structural features and functions of the present invention more clearly, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a first schematic diagram of a microphone isolation device according to an embodiment of the present invention.

Fig. 2 is a second schematic diagram of a microphone isolation device according to an embodiment of the present invention.

Fig. 3 is a third schematic view of a microphone isolation device according to an embodiment of the present invention.

Fig. 4 is a schematic view of a-a in fig. 3.

Fig. 5 is a schematic view of C-C in fig. 3.

Fig. 6 is a schematic diagram of B-B in fig. 3.

Fig. 7 is a schematic view of D-D in fig. 3.

Fig. 8 is a first exploded view of a microphone isolation device according to an embodiment of the present invention.

Fig. 9 is a second exploded view of the microphone isolation device according to the embodiment of the present invention.

The attached drawings indicate the following:

10. housing 11, upper case

12. Lower case 121, first through hole

122. Screw hole 123, fixed boss

13. Inner cavity 20, PCB board

21. Fixing element 22 and microphone

23. Sound recording hole 24, fixing hole

30. Isolation mechanism 31 and isolation enclosure wall

311. First wall 312 and second wall

313. Third wall 314 and fourth wall

315. First open end 316, first enclosure cavity

32. Silica gel cover 321, bottom surface

322. A first side 323 and a second side

324. Third side 325, fourth side

326. Second open mouth 327 and second enclosure cavity

328. Second through hole 34, insulating silicone body.

Detailed Description

Fig. 1 to 7 show a specific structure of a preferred embodiment of the present invention, which is a structure for improving the isolation and sealing of a microphone. The PCB comprises a shell 10, a PCB 20 and an isolation mechanism 30, wherein an upper shell 11 and a lower shell 12 of the shell 10 are assembled with each other to form a closed inner cavity 13; the PCB 20 is arranged in the cavity through a fixing element 21; the PCB board 20 is electrically connected to a microphone 22. The isolation mechanism 30 comprises an isolation fence 31 and a silica gel sleeve 32, the silica gel sleeve 32 and the isolation fence 31 surround the microphone 22 in sequence to form double-layer isolation seal, and an insulating silica gel body 34 is filled between gaps where the silica gel sleeve 32 and the isolation fence 31 contact the PCB 20; a single sound recording hole 23 is formed through the housing 10 and the isolation mechanism 30 so that the sound pickup portion of the microphone 22 communicates with the outside. Adopt and keep apart enclosure 31 and silica gel cover 32 to realize double-deck isolation sealed, can effectively improve among the prior art that the individual layer isolation is weak, the leakproofness is low scheduling problem.

More specifically, the isolation wall 31 is integrally formed on the lower shell 12, is a fully-enclosed structure integrally extending from the inner wall surface of the lower shell 12, and has a first wall 311, a second wall 312, a third wall 313 and a fourth wall 314 forming a quadrilateral; the walls are in turn joined end to form a first enclosure chamber 316 (fig. 8) having a first open mouth 315 in the lower shell 12. Furthermore, the lower shell 12 has a first through hole 121, and the first through hole 121 penetrates the first surrounding cavity 316 and the outside of the shell 10.

As shown in fig. 8, the silicone sleeve 32 is a fully enclosed structure, and has an integrated bottom 321, a first side 322, a second side 323, a third side 324, and a fourth side 325, wherein the bottom 321 and the sides are connected in sequence to form a second open cavity 326 and a second enclosed cavity 327, the silicone sleeve 32 is integrally inserted into the first enclosed cavity 316, and the first open cavity 315 and the second open cavity 326 are oriented in the same direction.

And the isolation enclosing wall 31 and the silicone sleeve 32 cover the microphone 22, the first open hole 315 and the second open hole 326 face the PCB board 20, and gaps between the first open hole 315, the second open hole 326 and the PCB board 20 are closed by filling the insulating silicone body 34. Furthermore, the silicone sleeve 32 has a second through hole, which is opposite to the first through hole 121 and forms the recording hole 23 for communicating the microphone 22 with the outside.

The upper shell 11 and the lower shell 12 are buckled with each other, or welded or bonded to form a sealed inner cavity 13, so that the isolation and sealing performance can be further improved.

After assembly, the periphery of the microphone 22 is in tight fit with the silica gel sleeve 32 without a gap, the silica gel sleeve 32 is in tight fit with the isolation fence 31 without a gap, and the silica gel sleeve 32, the isolation fence 31 and the bottom 321 of the microphone 22 are in tight fit with the PCB 20 without a gap.

As shown in fig. 6 and 7, the fixing member 21 is a screw. More specifically, the lower case 12 has a fixing boss 123 with a screw hole 122, and the screw passes through the fixing hole 24 of the PCB 20 and then is tightly fitted into the screw hole 122.

The utility model relates to an improve structure of microphone isolation leakproofness, the isolation principle is: a silica gel sleeve 32 is adopted to cover the microphone 22 to form a first layer of isolation; and then the isolation fence 31 covers the outside of the silica gel sleeve 32 to form a second layer of isolation. In particular, since the isolation fence 31 is integrated with the housing 10, no gap exists between the isolation fence 31 and the housing 10 (specifically, the lower housing 12), and the isolation effect is further improved. Moreover, the gaps among the silicone rubber sleeve 32, the isolation fence 31 and the PCB 20 are filled with the insulating silicone rubber 34, so that any gap that may exist is blocked. Finally, because the upper shell 11 and the lower shell 12 are sealed, only one sound recording hole 23 can communicate the sound pickup part of the microphone 22 with the outside, and the isolation and the sealing performance of the product are more stable.

More specifically, in one embodiment, the insulating silicone body 34 is a 704RTV high temperature resistant waterproof insulating silicone. The silica gel sleeve 32 is molded silica gel for 50 degrees; the upper shell 11 and the lower shell 12 are made of ABS + PC material. These materials all have the isolation effect, prevent that the sound of recording from the aspect of recording the hole 23 beyond from joining in, influence the recording effect.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any slight modifications, equivalent changes and modifications made by the technical spirit of the present invention to the above embodiments are all within the scope of the technical solution of the present invention.

Claims

1. The utility model provides an improve structure of microphone isolation leakproofness which characterized in that: comprises that

2. The structure for improving microphone isolation and sealing as claimed in claim 1, wherein: the isolation wall is integrally formed on the lower shell, is a full-enclosure structure integrally extended from the inner wall surface of the lower shell, and is provided with a first wall, a second wall, a third wall and a fourth wall which form a quadrangle; the enclosing walls are sequentially connected end to end in the lower shell to form a first enclosing cavity with a first open opening.

3. The structure for improving microphone isolation and sealing as claimed in claim 2, wherein: the lower shell is provided with a first through hole which is communicated with the outside of the first surrounding cavity and the shell.

4. A microphone isolation and sealing structure as claimed in claim 3, wherein: the silica gel cover is of a full-surrounding structure and is provided with an integrated bottom surface, a first side surface, a second side surface, a third side surface and a fourth side surface, the bottom surface and the side surfaces are sequentially connected to form a second open hole and a second surrounding cavity, the silica gel cover is integrally arranged in the first surrounding cavity, and the first open hole and the second open hole are in the same direction.

5. The structure for improving microphone isolation and sealing performance according to claim 4, wherein: the isolation enclosing wall and the silica gel cover the microphone, the first open port and the second open port face the PCB, and gaps among the first open port, the second open port and the PCB are sealed by filling insulating silica gel.

6. The structure for improving microphone isolation and sealing performance according to claim 4, wherein: the silica gel sleeve is provided with a second through hole which is opposite to the first through hole and forms a recording hole which is only communicated with the microphone and the outside.

7. The structure for improving microphone isolation and sealing as claimed in claim 1, wherein: the upper shell and the lower shell are mutually buckled, or welded or bonded and fixed to form a sealed inner cavity.

8. The structure for improving microphone isolation and sealing as claimed in claim 1, wherein: the fixing element is a screw.

9. The structure of claim 8, wherein the structure for improving microphone isolation and sealing performance is characterized in that: the lower shell is provided with a fixed convex column with a screw hole, and the screw is tightly matched with the screw hole after penetrating through the fixed hole on the PCB.

10. The structure for improving microphone isolation and sealing as claimed in claim 1, wherein: the periphery of the microphone is in tight fit with the silica gel sleeve in a seamless manner, the silica gel sleeve is in tight fit with the isolation enclosing wall in a seamless manner, and the bottom surfaces of the silica gel sleeve, the isolation enclosing wall and the microphone are in tight fit with the PCB in a seamless manner.