CN215344976U

CN215344976U - Microphone sealing structure and electronic equipment

Info

Publication number: CN215344976U
Application number: CN202120666984.2U
Authority: CN
Inventors: 江晓健
Original assignee: Shanghai Wingtech Electronic Technology Co Ltd
Current assignee: Shanghai Wingtech Electronic Technology Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-12-28
Anticipated expiration: 2031-03-30

Abstract

The utility model discloses a microphone sealing structure, which comprises a microphone, a rubber sleeve, a middle frame, a main board and a cover body, wherein the main board and the cover body are respectively arranged on two sides of the middle frame; the microphone is arranged on one side of the main board close to the middle frame, the middle frame is provided with a fixing hole matched with the shape of the rubber sleeve, and the rubber sleeve is arranged in the fixing hole and covers and fixes the surface of the microphone; the rubber sleeve is provided with a first sound outlet hole, and the cover body is provided with a second sound outlet hole; thereby mainboard and lid pressfitting both sides of center respectively make the gum cover sealed the fixed orifices, thereby just first play sound hole aligns with the second play sound hole and makes microphone and external intercommunication. The microphone sealing structure provided by the utility model improves the sound output effect of the microphone, so that the reliability of the microphone is improved. In addition, the two sides of the rubber sleeve are fixed through pressing, so that the back rubber is not needed to be used for fixing, and the cost is reduced.

Description

Microphone sealing structure and electronic equipment

[ technical field ] A method for producing a semiconductor device

The utility model relates to the technical field of electronic equipment, in particular to a microphone sealing structure and electronic equipment.

[ background of the utility model ]

Currently, more and more mobile terminals, such as smart phones, and particularly device phones, employ a dual Microphone (MIC) stack design to ensure clear transmission of sound during a call, wherein a primary MIC is conventionally designed on a sub-board, and a secondary MIC is usually designed in a main board area. The sub-MIC sound output mode is divided into a top sound output mode and a back sound output mode. When the top sound emitting method is adopted, since the device is usually disposed at the bottom of the top surface and the top sound emitting hole is disposed at the top surface, a sound channel needs to be constructed on the housing to guide the sound to the top sound emitting hole, which has a problem of large sound loss. Therefore, at present, the secondary MIC is usually in a back-sounding manner. The back sound output mode is adopted, holes can be directly formed in the corresponding positions of the devices, but the back adhesive bonding mode is often adopted, the microphone is low in sealing performance, and poor functions are easily caused.

Accordingly, there is a need to provide a microphone sealing structure and an electronic device to overcome the above-mentioned drawbacks.

[ Utility model ] content

The utility model aims to provide a microphone sealing structure and electronic equipment, and aims to solve the problem that the microphone is low in sealing performance in a back sound output mode and improve reliability.

In order to achieve the above object, the present invention provides a microphone sealing structure, which includes a microphone, a rubber sleeve, a middle frame, and a main board and a cover body respectively disposed on two sides of the middle frame; the microphone is arranged on one side, close to the middle frame, of the mainboard, the middle frame is provided with a fixing hole matched with the rubber sleeve in shape, and the rubber sleeve is arranged in the fixing hole and covers and fixes the surface of the microphone; the rubber sleeve is provided with a first sound outlet hole, and the cover body is provided with a second sound outlet hole; the main board and the cover body are respectively pressed on two sides of the middle frame, so that the rubber sleeve seals the fixing hole, and the first sound outlet hole is aligned with the second sound outlet hole, so that the microphone is communicated with the outside.

In a preferred embodiment, two opposite sides of the rubber sleeve extend outwards vertically to form first limiting protrusions, the inner wall of the fixing hole extends outwards to form limiting grooves matched with the first limiting protrusions, and the first limiting protrusions and the limiting grooves are matched to limit the direction in which the cover body is pressed on the middle frame.

In a preferred embodiment, the rubber sleeve is further provided with a second limiting bump extending perpendicularly outwards, and the second limiting bump and the first limiting bump are respectively arranged on two sides of the rubber sleeve along the direction extending into the fixing hole; the second limiting bump is used for being attached to one side, close to the main board, of the middle frame, so that the direction of pressing the main board on the middle frame is limited.

In a preferred embodiment, the second sound outlet hole of the cover body is provided with a dust screen, and the dust screen is fixed on one side of the cover body close to the rubber sleeve through a back adhesive.

In a preferred embodiment, the shape of the back adhesive is consistent with that of the dust screen, and the back adhesive is provided with a third sound outlet aligned with the second sound outlet.

In a preferred embodiment, the surface of the rubber sleeve extends in a direction close to the cover body to form an annular convex ring surrounding the first sound outlet at intervals, and one side of the annular convex ring, which is far away from the rubber sleeve, is used for being in interference abutment with the cover body.

In a preferred embodiment, one side of the rubber sleeve close to the main board surrounds the microphone and is in interference abutment with the main board.

In a preferred embodiment, the rubber sleeve is a silicone sleeve or a rubber sleeve.

The utility model also provides an electronic device comprising the microphone sealing structure according to any one of the above embodiments.

According to the microphone sealing structure provided by the utility model, the position of the middle frame corresponding to the microphone is provided with the fixing hole, the rubber sleeve is arranged in the fixing hole, when the cover body and the main board are respectively pressed on the two sides of the middle frame, the two sides of the rubber sleeve are respectively abutted against the cover body and the main board, so that the fixing hole is sealed, the sound output effect of the microphone is further improved, and the reliability of the microphone is improved. In addition, the two sides of the rubber sleeve are fixed through pressing, so that the back rubber is not needed to be used for fixing, and the cost is reduced.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an exploded perspective view of a microphone sealing structure provided in the present invention;

fig. 2 is a perspective view of a rubber boot connection part in the microphone sealing structure shown in fig. 1;

fig. 3 is an exploded perspective view of the rubber sleeve and the middle frame in the microphone sealing structure shown in fig. 3.

Fig. 4 is a perspective view of the connection between the rubber sleeve and the middle frame in the microphone sealing structure shown in fig. 3;

fig. 5 is a perspective view of the connection between the rubber sleeve and the middle frame of the microphone sealing structure shown in fig. 3 at another angle.

Reference numbers in the figures: 100. a microphone sealing structure; 10. a microphone; 20. a rubber sleeve; 21. a first sound outlet; 22. an annular convex ring; 23. a first limit bump; 24. a second limit bump; 30. a middle frame; 31. a fixing hole; 32. a limiting groove; 33. an avoidance structure; 40. a main board; 50. a cover body; 51. a second sound outlet; 60. a dust screen; 61. carrying out gum application; 62. a third sound outlet.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In an embodiment of the present invention, a microphone sealing structure 100 is provided for fixing and sealing a microphone (typically, a sub-microphone) in an electronic device that uses a back-sound method. The electronic device includes, but is not limited to, a mobile phone, a tablet computer, and other terminal devices with a built-in microphone.

As shown in fig. 1 and fig. 2, the microphone sealing structure 100 includes a microphone 10, a rubber sleeve 20, a middle frame 30, and a main board 40 and a cover 50 respectively disposed on two sides of the middle frame 30. The middle frame 30 and the cover 50 are fixed together by dispensing or the like.

Specifically, as shown in fig. 3-5, the microphone 10 is disposed on a side of the main board 40 close to the middle frame 30. That is, the microphone 10 is fixed on the main board 40 and electrically connected to the main board 40. The middle frame 30 is provided with a fixing hole 31 matched with the shape of the rubber sleeve 20. In the present embodiment, the fixing hole 31 is a rectangular parallelepiped hole, and the rubber sleeve 20 has a hollow rectangular parallelepiped shape and one side thereof is provided with an opening, so that the side surface of the rubber sleeve 20 is in close contact with the inner wall of the fixing hole 31. The rubber sleeve 20 is a silica gel sleeve, a rubber sleeve or made of other materials with certain elasticity, and in this embodiment, the rubber sleeve 20 is silica gel and has a hardness of about 65.

When the main board 40 is fixed to the middle frame 30, the microphone 10 extends into the fixing hole 31 and extends into the rubber sleeve 20 through the opening on one side of the rubber sleeve 20, that is, the rubber sleeve 20 is disposed in the fixing hole 31 and covers and fixes the surface of the microphone 10. When the main board 40 and the cover 50 are respectively pressed on two sides of the middle frame 30, one side (i.e., the side with the opening) of the rubber sleeve 20 close to the main board 40 surrounds the microphone 10 and is in interference abutment with the main board 40, i.e., the rubber sleeve 20 and the main board 40 jointly seal the microphone 10, so that the sound generated by the microphone 10 is prevented from leaking through a gap between the main board 40 and the rubber sleeve 20, and the sound quality effect is prevented from being reduced; the surface of the rubber cover 20 on the side away from the main plate 40 abuts against the inner wall of the lid 50, so that the rubber cover 20 seals the fixing hole 31. It should be noted that interference fit is adopted between the rubber sleeve 20 and the main board 40, between the rubber sleeve 20 and the microphone 10, and between the rubber sleeve 20 and the cover 50, and the interference amounts are respectively 0.35mm, 0.05mm, and 0.15mm, so that it is not necessary to fix the rubber sleeve 20 by using a back adhesive as in the prior art, and the cost is further reduced. Generally speaking, when the microphone 10 is supplied in a factory, the microphone 10 is protected by the matching rubber sleeve 20, and therefore, the rubber sleeve 20 carried by the microphone 10 is used for sealing, the time of assembling the whole microphone is reduced, and the labor cost is reduced.

Wherein, the rubber sleeve 20 is provided with a first sound outlet 21, and the cover 50 is provided with a second sound outlet 51. In the present embodiment, the first sound emitting hole 21 and the second sound emitting hole 51 are both circular holes. When the rubber sleeve 20 is fixed to the middle frame 30, since the microphone 10 is disposed in the rubber sleeve 20, the first sound outlet 21 and the second sound outlet 51 are aligned to communicate the microphone 10 with the outside, so that the sound of the microphone 10 can be transmitted to the outside in time, and no additional sound guide channel structure is required.

Further, as shown in fig. 3-5, a part of the surface of the rubber sleeve 20 extends in a direction close to the cover to form an annular convex ring 22 surrounding the first sound outlet hole 21 at intervals, and a projected area of the annular convex ring 22 relative to the surface of the rubber sleeve 20 is gradually reduced from a direction close to the rubber sleeve 20 to a direction away from the rubber sleeve 20, so as to form a tip-like cone structure. When lid 50 and center 30 are fixed, thereby annular protruding circle 22 is extrudeed thereby makes the one side of keeping away from gum cover 20 warp, and then with lid 50 interference butt, encircles first sound outlet 21 and seals, avoids in external steam enters into electronic equipment through the gap between center 30 and the lid 50, simultaneously corresponding also avoided the emergence of situations such as lou.

Further, as shown in fig. 3-5, two opposite sides of the rubber sleeve 20 extend outward vertically to form a first limiting protrusion 23, and the inner wall of the fixing hole 31 extends outward to form a limiting groove 32 adapted to the first limiting protrusion 23. In this embodiment, the height of the first limiting protrusion 23 along the central axis of the fixing hole 31 is smaller than the height of the rubber sleeve 20 in the direction, and correspondingly, the depth of the limiting groove 32 is consistent with the height of the first limiting protrusion 23. When the rubber sleeve 20 is fixed in the fixing hole 31, the first limiting projection 23 is matched with the limiting groove 32 to limit the direction of pressing the middle frame 30 along the cover 50, so that the pressure is prevented from being directly transmitted to the main board 40 through the rubber sleeve 20, and the structure of the main board 40 is further damaged.

Furthermore, the rubber sleeve 20 is further provided with a second limiting convex block 24 extending outward vertically, and the second limiting convex block 24 and the first limiting convex block 23 are respectively arranged on two sides of the rubber sleeve 20 along the direction extending into the fixing hole 31. The second limit bump 24 is attached to one side of the middle frame 30 close to the main board 40, so as to limit the pressing direction of the main board 40 on the middle frame 30. Therefore, by providing the first limit protrusion 23 and the second limit protrusion 24, the pressure applied by the cover 50 and the main board 40 is borne by the middle frame 30, and a direct action between the cover 50 and the main board 40 is avoided. The middle frame 30 is provided with an avoiding structure 33 corresponding to the second limit bump 24 so that the second limit bump 24 is attached to one side of the middle frame 30 close to the main plate 40.

Further, as shown in fig. 1 and fig. 2, the second sound outlet hole 51 of the cover 50 is provided with a dust-proof net 60, and the dust-proof net 60 is fixed to one side of the cover 50 close to the rubber sleeve 20 through a back adhesive 61, so as to shield the first sound outlet hole 21 of the rubber sleeve 20, and prevent external impurities from entering the rubber sleeve 20 through the first sound outlet hole 21, thereby affecting the microphone 10. The shape of the back adhesive 61 is consistent with that of the dust screen 60, and the back adhesive is rectangular. The back adhesive 61 is provided with a third sound outlet 62, and the third sound outlet 62 is aligned with the second sound outlet 51, so that the back adhesive 61 is prevented from blocking sound while ensuring a larger bonding area of the dust screen 60.

The utility model also provides an electronic device (not shown in the figures) comprising a microphone sealing structure 100 according to any of the above embodiments.

In summary, in the microphone sealing structure 100 provided by the present invention, the fixing hole 31 is formed at the position of the middle frame 30 corresponding to the microphone 10, and the rubber sleeve 20 is disposed in the fixing hole 31, when the cover 50 and the main board 40 are respectively pressed on two sides of the middle frame 30, two sides of the rubber sleeve 20 are respectively abutted against the cover 50 and the main board 40, so as to seal the fixing hole 31, thereby improving the sound output effect of the microphone 10, and improving the reliability of the microphone 10. In addition, the two sides of the rubber sleeve 20 are fixed through pressing, so that the back rubber is not needed for fixing, and the cost is reduced.

The utility model is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the utility model is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. A microphone sealing structure is characterized by comprising a microphone, a rubber sleeve, a middle frame, a main board and a cover body, wherein the main board and the cover body are respectively arranged on two sides of the middle frame; the microphone is arranged on one side, close to the middle frame, of the mainboard, the middle frame is provided with a fixing hole matched with the rubber sleeve in shape, and the rubber sleeve is arranged in the fixing hole and covers and fixes the surface of the microphone; the rubber sleeve is provided with a first sound outlet hole, and the cover body is provided with a second sound outlet hole; the main board and the cover body are respectively pressed on two sides of the middle frame, so that two sides of the rubber sleeve seal the fixing holes, and the first sound outlet holes are aligned with the second sound outlet holes, so that the microphone is communicated with the outside.

2. The microphone sealing structure according to claim 1, wherein opposite sides of the rubber sleeve extend perpendicularly outward to form first limiting protrusions, an inner wall of the fixing hole extends outward to form limiting grooves adapted to the first limiting protrusions, and the first limiting protrusions and the limiting grooves cooperate to limit a pressing direction of the cover body onto the middle frame.

3. The microphone sealing structure according to claim 2, wherein the rubber sleeve is further provided with a second limiting projection extending perpendicularly outward, and the second limiting projection and the first limiting projection are respectively provided on two sides of the rubber sleeve along a direction extending into the fixing hole; the second limiting bump is used for being attached to one side, close to the main board, of the middle frame, so that the direction of pressing the main board on the middle frame is limited.

4. The microphone sealing structure according to claim 1, wherein the second sound outlet hole of the cover is provided with a dust screen, and the dust screen is fixed to a side of the cover close to the rubber cover by a back adhesive.

5. The microphone sealing structure of claim 4, wherein the shape of the adhesive is identical to the shape of the dust screen, and a third sound hole is formed in the adhesive and aligned with the second sound hole.

6. The microphone sealing structure according to claim 1, wherein a surface of the rubber sleeve extends in a direction close to the cover to form an annular convex ring surrounding the first sound outlet at intervals, and a side of the annular convex ring away from the rubber sleeve is used for interference abutment with the cover.

7. The microphone sealing structure of claim 6, wherein a side of the rubber boot near the main board surrounds the microphone and is in interference abutment with the main board.

8. The microphone sealing structure according to claim 1, wherein the rubber sleeve is a silicone sleeve or a rubber sleeve.

9. An electronic device, characterized in that the electronic device comprises a microphone sealing structure according to any of claims 1-8.