CN107920323B

CN107920323B - Microphone sealing device

Info

Publication number: CN107920323B
Application number: CN201610884795.6A
Authority: CN
Inventors: 王小明
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2016-10-10
Filing date: 2016-10-10
Publication date: 2020-10-16
Anticipated expiration: 2036-10-10
Also published as: WO2018068445A1; CN107920323A

Abstract

The invention discloses a microphone sealing device, which comprises a sealing sleeve, an elastic body, a pressing part and a positioning part, wherein the elastic body is arranged on the sealing sleeve; the sealing sleeve is sleeved on a microphone (8), the elastic body is abutted between the sealing sleeve and the pressing part, and the pressing part is installed on the main board (7) through the positioning part. The elastic body is compressed by the compressing part, the elastic body transmits force to the sealing sleeve, and the sealing sleeve props against the shell, so that the sealing sleeve and the shell are tightly pressed, and the sealing effect is achieved. The invention has high sealing reliability and is convenient to disassemble and recover.

Description

Microphone sealing device

Technical Field

The invention belongs to the technical field of audio equipment, and particularly relates to a microphone sealing device.

Background

MIC (Microphone) is a very important device for mobile phone products, which can convert sound signals into electric sound signals. The utilization of MIC by communication manufacturers directly affects the quality of communication, and MIC of mobile phones on the market at present needs to adopt sealing treatment to prevent signal leakage or prevent noise and even echo phenomena generated in communication.

Two common sealing modes are provided, one mode is that the foam is in direct contact sealing, and the other mode is that the silica gel sleeve is in direct contact sealing. The structure sealed by direct contact of foam is shown in fig. 1, and the structure is directly compressed and sealed by a case 101 and foam 102, wherein the case 101 presses the foam 102, the foam 102 presses an MIC103, the MIC103 is mounted on a main board 105, and sound is conducted through a sound conduction channel 104. The structure has the advantages of simple structure and easy assembly. A structure sealed by direct contact of a silicone boot is shown in fig. 2, and the structure is loaded into MIC203 through silicone boot 204, then pressed sideways into housing 201 with interference, MIC203 is mounted on motherboard 205, and conducts sound through sound channel 202. The structure has the advantages of simple assembly and easy operation.

The inventor finds that when the foam is in direct contact sealing structure, the compression amount of the foam is not well controlled due to the influence of tolerance and fit of the shell, and the foam becomes soft after long service time, so that the sealing performance is uncertain. When the structure of direct contact sealing through the silica gel sleeve is adopted, the shell can possibly cause a gap to be generated between the shell and the silica gel sleeve after being assembled downwards, so that the sealing performance is poor or cannot be perceived, and meanwhile, the silica gel sleeve cannot be reliably contacted with the shell due to the manufacturing tolerance of the shell and the silica gel sleeve, so that the sealing performance is reduced.

Disclosure of Invention

The invention aims to provide a microphone sealing device, which is used for solving the problem of poor sealing reliability caused by the influence of manufacturing tolerance of the sealing structure in the prior art.

In order to solve the above technical problems, the present invention provides a microphone sealing device, which includes a sealing sleeve, an elastic body, a pressing portion and a positioning portion;

the sealing sleeve is sleeved on the microphone 8, the elastic body is abutted between the sealing sleeve and the pressing part, and the pressing part is installed on the main board 7 through the positioning part.

Further, the compressing portion comprises a rotating shaft 2 and a clamp spring 4, the rotating shaft 2 is fixedly connected with the sealing sleeve, an annular groove is formed in the rotating shaft 2, and the clamp spring 4 can be clamped in the annular groove.

Further, the rotating shaft 2 and the sealing sleeve are combined into an integral piece in an in-mold injection molding mode, or are combined together in a screw fixing or buckle fixing mode.

Further, the annular groove is multiple.

Further, the plurality of annular grooves are equidistantly arranged on the rotating shaft 2.

Further, the positioning part is a sleeve 5 with a positioning hole, the rotating shaft 2 is sleeved in the sleeve 5, and the sleeve 5 is installed on the main board 7 through the positioning hole.

Further, the rotating shaft 2 is made of metal or plastic.

Further, the seal cover is the silica gel cover 1 that adopts silica gel material or TPU material.

Further, the elastic body is a spring 3.

Further, the seal sleeve, the elastic body, the pressing part and the positioning part are packaged together.

The invention has the following beneficial effects:

the elastic body is compressed by the compressing part, the elastic body transmits the force to the sealing sleeve, and the sealing sleeve props against the shell, so that the sealing sleeve and the shell are tightly pressed, and the sealing function can be well finished even if manufacturing tolerance exists. The invention has high sealing reliability and is convenient to disassemble and recover.

Drawings

FIG. 1 is a prior art block diagram of a direct contact seal with foam;

FIG. 2 is a prior art block diagram of a direct contact seal via a silicone sleeve;

fig. 3 is an exploded view of a microphone sealing device according to an embodiment of the present invention;

fig. 4 is a cross-sectional view of a microphone sealing device according to an embodiment of the present invention;

fig. 5 is a structural diagram of a microphone sealing device after installation according to an embodiment of the present invention.

Detailed Description

In order to solve the problem of poor sealing reliability caused by the influence of manufacturing tolerance of the sealing structure in the prior art, the invention provides a microphone sealing device, and the invention is further described in detail below with reference to the accompanying drawings and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.

An exploded schematic view and a sectional view of a microphone sealing device according to an embodiment of the present invention are shown in fig. 3 and 4, respectively, and the microphone sealing device includes a sealing sleeve, an elastic body, a pressing portion, and a positioning portion; the microphone 8 is welded on the mainboard 7, the sealing sleeve is sleeved on the microphone 8, the elastic body is abutted between the sealing sleeve and the pressing part, and the pressing part is installed on the mainboard 7 through the positioning part.

The compressing part comprises a rotating shaft 2 and a clamp spring 4. The rotating shaft 2 is fixedly connected with the sealing sleeve, the connecting mode of the rotating shaft and the sealing sleeve can be combined into a whole in an in-mold injection molding mode, and the rotating shaft and the sealing sleeve can also be combined together in a screw fixing or buckle fixing mode. The rotating shaft 2 is provided with an annular groove, the clamp spring 4 can be clamped in the annular groove, the annular groove can be one or more, and in this embodiment, 5 annular grooves 21, 22, 23, 24 and 25 are equidistantly arranged on the rotating shaft 2. The clamp spring 4 can be clamped in different annular grooves, and the elastic force of the elastic body can be adjusted through the clamping mode, so that the sealing effect of the sealing sleeve is adjusted, and different sealing effects are finally achieved.

The positioning part is a sleeve 5 with a positioning hole, the rotating shaft 2 is sleeved in the sleeve 5, and the sleeve 5 is installed on the main board 7 through the positioning hole.

The rotating shaft 2 is made of metal or plastic, the sealing sleeve is a silica gel sleeve 1 made of silica gel or thermoplastic polyurethane elastomer rubber TPU, and the elastomer is a spring 3.

The sealing sleeve, the elastic body, the pressing part and the positioning part can be packaged together to be used as a mechanism, but once the sealing sleeve, the elastic body, the pressing part and the positioning part are packaged together, the mechanism cannot be disassembled and assembled, and the flexibility is reduced.

When the microphone sealing device is manufactured and installed, firstly, an integrated silica gel sleeve containing a rotating shaft is injected in a mould, and a spring is sleeved on the integrated silica gel sleeve; then, a clamp spring is added at the tail part of the rotating shaft, when the spring is compressed, the spring transmits the force to the silica gel sleeve, and then the silica gel sleeve props against the shell to realize tight pressing and complete the sealing function; finally, in order to ensure that the structure has good fixing function, the parts are fixed on the main board through screws, and accurate positioning and sealing are realized. The specific manufacturing and installation process is as follows:

firstly, the silica gel sleeve 1 and the rotating shaft 2 are combined into an integrated piece in an in-mold injection molding mode, wherein the silica gel sleeve can be made of silica gel materials or Thermoplastic Polyurethanes (TPU), the rotating shaft 2 is made of metal or plastic materials, and 5 annular grooves 21, 22, 23, 24 and 25 are arranged on the rotating shaft 2 at equal intervals.

Then the integrated part is put on a microphone 8, and a spring 3 is sleeved on the rotating shaft 2, wherein the force of the spring can be selected according to actual requirements; the circlip 4 is then snapped into the respective annular groove 21 to 25 as required.

The above assembled parts are sleeved into a sleeve 5, wherein the sleeve 5 is provided with two positioning holes 51 and 52, and two holes 71 and 72 are formed at the corresponding positions of the main board 7. Finally, the screws 6 (including the two screws 61, 62) are mounted on the main board 7 through the holes 51, 52, 71, 72, thereby locking and positioning the main board. At this time, the head of the silica gel sleeve 1 tightly combines the silica gel sleeve 1 and the shell 9 together by the pressing force of the spring, and the complete sealing is completed. The structure of the microphone sealing device according to the embodiment of the present invention after the installation is completed is shown in fig. 5.

When the microphone sealing device provided by the embodiment of the invention is used, the force can be adjusted by adjusting the position of the annular groove of the clamping spring 4 clamped into the rotating shaft 2, for example, the spring is clamped into the annular groove 21, or the clamping spring can be taken out and put into the annular groove 22 or other annular grooves, and the tighter the spring compression is, the better the sealing performance is, which depends on the environment of a user.

In the embodiment, on the basis of the existing direct contact sealing through the silica gel sleeve, the spring pressing structure is added to realize the sealing effect of the silica gel sleeve and the shell, so that the sealing effect is greatly improved, the reliability is high, and the sealing effect can be well finished even if manufacturing tolerance exists; when the rotary shaft sealing device is used, the sealing of the silica gel sleeve can be adjusted at any time according to the position where the clamp spring is clamped into the rotary shaft, and the rotary shaft sealing device is convenient and simple, high in sealing flexibility and convenient to disassemble and recycle.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

Claims

1. A microphone sealing device is characterized by comprising a sealing sleeve, an elastic body, a pressing part and a positioning part;

the sealing sleeve is sleeved on a microphone (8), the elastic body is abutted between the sealing sleeve and the pressing portion, the pressing portion is installed on the main board (7) through the positioning portion, the pressing portion compresses the elastic body, and the elastic body transmits force to the sealing sleeve so that the sealing sleeve abuts against the shell.

2. The microphone sealing device according to claim 1, wherein the compressing portion comprises a rotating shaft (2) and a clamp spring (4), the rotating shaft (2) is fixedly connected with the sealing sleeve, an annular groove is formed in the rotating shaft (2), and the clamp spring (4) is clamped in the annular groove.

3. Microphone sealing device according to claim 2, characterized in that the shaft (2) and the sealing sleeve are integrated in one piece by injection molding or by screw or snap fastening.

4. The microphone sealing device of claim 2, wherein the annular groove is plural.

5. Microphone sealing arrangement according to claim 4, characterized in that the annular grooves are arranged equidistantly on the shaft (2).

6. A microphone sealing arrangement according to claim 2, characterized in that the positioning part is a sleeve (5) comprising a positioning hole, the shaft (2) is sleeved in the sleeve (5), and the sleeve (5) is mounted on the main plate (7) through the positioning hole.

7. Microphone sealing arrangement according to claim 2, characterized in that the shaft (2) is made of metal or plastic.

8. The microphone sealing device according to claim 1, wherein the sealing sleeve is a silicone sleeve (1) made of silicone or thermoplastic polyurethane elastomer rubber TPU.

9. Microphone sealing arrangement according to claim 1, characterized by the fact that the elastomer is a spring (3).

10. The microphone sealing device according to any one of claims 1 to 9, wherein the sealing sleeve, the elastic body, the pressing portion, and the positioning portion are packaged together.