CN211321468U

CN211321468U - Microphone structure and electronic equipment

Info

Publication number: CN211321468U
Application number: CN201922235562.5U
Authority: CN
Inventors: 张�浩
Original assignee: Goertek Microelectronics Inc
Current assignee: Goertek Microelectronics Inc
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-08-21
Anticipated expiration: 2029-12-12
Also published as: WO2021114425A1

Abstract

The utility model relates to a microphone structure and electronic equipment, include: the sound sensing element is provided with a first sound hole; the protective shell forms a sealed protective cavity outside the first sound hole, and a second sound hole is formed in the protective shell; the waterproof membrane is fixed in the protective cavity and divides the protective cavity into a first cavity communicated with the first sound hole and a second cavity communicated with the second sound hole; and one end of the elastic sealing element is fixed on the protective shell around the second sound hole, and the other end of the elastic sealing element is used for being fixed with a part applied to the microphone structure. The utility model discloses a technical effect lies in, through with the component and the external separation in the microphone, prevent that foreign matter such as the outside dust of microphone structure, liquid, strong air current, static from causing influence or damage to the interior component of microphone.

Description

Microphone structure and electronic equipment

Technical Field

The utility model relates to an acoustoelectric technology field, more specifically, the utility model relates to a microphone structure and electronic equipment.

Background

A microphone is a transducer that converts sound into an electronic signal, with many delicate components inside the microphone. The microphone is suitable for being used in various complex environments. When the microphone works in different use environments, the microphone is affected by different external foreign matters, and the performance of the microphone is reduced or the microphone is damaged.

In the working environment of the microphone, dust, liquid, strong airflow, static electricity and the like which influence the normal operation of the microphone may exist. For example, dust or liquid may come into contact with or enter elements within the microphone after entering through the sound hole of the microphone. This can affect device performance and cause damage to the device.

Therefore, a new technical solution is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a microphone structure and electronic equipment's new technical scheme.

According to the utility model discloses a first aspect provides: a microphone structure comprising:

a sound sensing element provided with a first sound hole;

the protective shell forms a sealed protective cavity outside the first sound hole, and a second sound hole is formed in the protective shell;

the waterproof membrane is fixed in the protective cavity and divides the protective cavity into a first cavity communicated with the first sound hole and a second cavity communicated with the second sound hole;

and one end of the elastic sealing element is fixed on the protective shell around the second sound hole, and the other end of the elastic sealing element is used for being fixed with a part applied to a microphone structure.

Optionally, the protective shell comprises:

a sidewall secured around the first acoustic aperture, the waterproofing membrane secured to the sidewall;

the baffle, the baffle forms after fixed with the lateral wall protection chamber, the second sound hole sets up on the baffle.

Optionally, the baffle is bent towards the outside of the protection cavity to form a protruding part.

Optionally, a third sound hole is further disposed on the baffle plate of the protective shell, and the second sound hole and the third sound hole are separated by the protruding portion.

Optionally, the second sound hole and the third sound hole are symmetrically arranged along an axis of the first sound hole.

Optionally, the second sound hole and the third sound hole are provided on a side of the boss portion.

Optionally, the plane of the waterproof membrane is parallel to the radial direction of the first sound hole.

Optionally, the resilient sealing element is foam or rubber.

Optionally, the resilient sealing element is in a compressed state, the amount of compression of the resilient sealing element being defined by the height of the raised portion.

Optionally, the material of the waterproof membrane is ePTFE.

According to another aspect of the present disclosure, there is provided an electronic device, including the microphone structure of any one of the above items, wherein the elastic sealing element is connected to a housing of the electronic device, and the second sound hole and the third sound hole are respectively communicated with different sound channels on the housing of the electronic device.

According to the utility model discloses an embodiment, through with the component and the external separation in the microphone structure, prevent that foreign matter such as dust, liquid, strong air current, static outside the microphone structure from causing influence or damage to the interior component of microphone.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

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

Fig. 2 is a state diagram of the waterproof membrane according to an embodiment of the present invention receiving an external pressure.

Fig. 3 is a schematic structural diagram of the microphone structure according to an embodiment of the present invention, which is provided with uncompressed foam.

In the figure, 1 is a sound sensing element, 14 is a first sound hole, 2 is a protective shell, 21 is a side wall, 22 is a baffle, 23 is a second sound hole, 24 is a third sound hole, 25 is a boss, 3 is a waterproof membrane, 4 is an elastic sealing element, and 5 is a shell.

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: unless specifically stated otherwise, 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.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a 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.

According to an embodiment of the present disclosure, the present invention provides a microphone structure, as shown in fig. 1, the microphone structure includes:

a sound sensing element 1, said sound sensing element 1 being provided with a first sound aperture 14; sound reception and transmission of the sound sensing element 1 are performed through the first sound hole 14.

The protective shell 2 forms a sealed protective cavity outside the first sound hole 14, and a second sound hole 23 is formed in the protective shell 2;

the waterproof membrane 3 is fixed in the protective cavity, and the waterproof membrane 3 divides the protective cavity into a first cavity communicated with the first sound hole 14 and a second cavity communicated with the second sound hole 23;

and one end of the elastic sealing element 4 is fixed on the protective shell 2 around the second sound hole 23, and the other end of the elastic sealing element 4 is used for fixing with a component applied to a microphone structure.

In this embodiment, the shield case 2 is provided outside the first sound hole 14 provided on the sound sensing element 1, and the shield case 2 forms a sealed shield cavity to the first sound hole 14. The protective shell 2 is sealed against the first sound hole 14, for example, by being fixed by means of bonding or welding. The waterproof membrane 3 is arranged in the protection cavity, the protection cavity is divided into a first cavity and a second cavity by the waterproof membrane 3, and the first cavity is not communicated with the second cavity. The first cavity communicates with the first sound hole 14 and the second cavity communicates with the second sound hole 23. Thus, the first cavity is communicated with the interior of the sound sensing element 1, and the second cavity is communicated with the external space of the protective shell 2.

One end of an elastic sealing element 4 is fixed on the protective shell 2, the elastic sealing element 4 surrounds the second sound hole 23, and the other end of the elastic sealing element 4 is fixed with a part applied to a microphone structure. The space surrounded by the elastic sealing member 4 is communicated with the second sound hole 23. The other end part has an opening to form an acoustic channel communicating with the second sound hole 23.

For example, the component at the other end may be a microphone housing, with the opening being a sound receiving hole. The external sound enters from the sound receiving hole, passes through the acoustic channel, and enters from the second sound hole 23 into the second cavity in the protection chamber. The sound that gets into the protection chamber drives the vibration of waterproof membrane 3, and the vibration of waterproof membrane 3 drives the interior atmospheric pressure change of first cavity and transmits sound from first sound hole 14 to inside sound sensing element 1 to receive sound. In addition, the component at the other end can also be a shell of the device where the microphone is located.

The protective shell 2 arranged outside the first sound hole 14 can block foreign matters from entering the sound sensing element 1, the waterproof membrane 3 divides a protective cavity in the protective shell 2 into a first cavity and a second cavity, and external foreign matters cannot enter the sound sensing element 1 from the first sound hole 14 through the waterproof membrane 3. This microphone structure can prevent foreign substances such as dust, liquid, strong air flow, static electricity, and the like from entering the interior of the sound sensing element 1 from the first sound hole 14.

The elastic sealing element 4 is fixed between the protective shell 2 and the part where the microphone structure is located, and foreign matters entering the sound channel from the outside of the part where the microphone structure is located can be blocked by the elastic sealing element 4 and cannot enter other elements in the microphone from the part where the microphone structure and the part where the microphone structure are located. Preventing impact or damage to other components. For example, foreign substances such as dust, liquid, strong air flow, static electricity, etc. are blocked by the elastic sealing member 4, and the foreign substances entering the sound channel do not affect or damage other elements in the microphone.

The arrangement of the waterproof membrane 3 and the elastic sealing element 4 enables the microphone structure to have the capabilities of preventing dust, liquid, strong airflow, static electricity and the like, and improves the reliability of the microphone performance.

For example, as shown in FIG. 2, the arrows represent incoming foreign matter. Taking the example of water entering from the acoustic channel, the water is restricted by the elastic sealing element 4 after entering from the acoustic channel and cannot move to the direction outside the protective shell 2. The other elements than the sound sensing element 1 are protected. The entry of water into the second cavity along the second sound hole 23 is restricted by the waterproof membrane 3, preventing the entry of water into the sound sensing element 1 from the first sound hole 14, protecting the sound sensing element 1. In the figure, the waterproof membrane 3 may be in a state of being deformed by the water pressure, and the waterproof membrane 3 is restored after the pressure is released. The variation of the waterproof membrane 3 in the figure may also be a state in which sound vibrates the waterproof membrane 3 in the process of transmitting sound. The entire process of vibration transmits sound into the sound sensing element 1.

Optionally, the material of the waterproof membrane 3 is ePTFE. The waterproof membrane 3 made of ePTFE material has excellent waterproof and windproof functions. The use of this material can improve the protective effect of the waterproof film 3 on the sound sensing element 1, and improve the reliability of the waterproof film 3.

In one embodiment, the protective shell 2 comprises: a side wall 21, the side wall 21 being fixed around the first sound hole 14, the waterproofing membrane 3 being fixed with the side wall 21; the baffle 22, the baffle 22 forms the protection chamber after fixed with lateral wall 21, the second sound hole 23 sets up on baffle 22.

In this embodiment, the side wall 21 forms a seal with the first sound hole 14 after being fixed with the baffle 22. The waterproof membrane 3 is fixed on the side wall 21 of the protective shell to divide the protective cavity into a first cavity and a second cavity. The first acoustic hole 14 communicates the first cavity with the acoustic cavity inside the sound sensing element 1. The second cavity is communicated with the outside of the protective shell 2 through a second sound hole 23.

The elastic sealing member 4 is fixed to the bezel 22 so as to surround the second sound hole 23.

The side wall 21 and the baffle 22 are fixed to form a protective shell, and the side wall 21 and the baffle 22 may be fixed after being manufactured separately.

For example, the side wall 21 is fixed outside the first sound hole 14, the waterproof membrane 3 is fixed on the side wall 21, and the baffle 22 is fixed. Or the waterproof membrane 3 is fixed on the side wall 21, then the baffle 22 is fixed, and finally the side wall 21 is fixed outside the first sound hole 14.

When the side wall 21 and the baffle 22 are fixed, the side wall 21 may surround the side of the baffle 22 and be fixed. The elastic sealing element 4 can thus be fixed to the flap 22 and also to the side wall 21. It is also possible that one end of the side wall 21 is fixed to the side of the shield 22 facing the protective chamber. The elastic sealing member 4 is fixed to the bezel 22 so as to enclose the second sound hole 23.

The protective shell 2 is fixedly formed between the side wall 21 and the baffle 22, and the protective shell 2 can also be formed by integrally molding the side wall 21 and the baffle 22. For example, the waterproof membrane 3 is fixed to the side wall 21, and the shield shell 2 is fixed outside the first sound hole 14.

In one embodiment, as shown in fig. 1, the baffle 22 is bent outward of the guard cavity to form a protrusion 25.

In this embodiment, the convex portion 25 formed on the baffle plate 22 can form a support for a component applied to the microphone structure, which forms a space for communicating the second sound hole 23 with the outside. And, contact, collision between the parts that protective shell 2 and microphone structure applied can also be avoided, protective shell 2 is avoided being damaged.

In one embodiment, as shown in fig. 1, a third sound hole 24 is further disposed on the baffle plate of the protective shell, and the second sound hole 23 and the third sound hole 24 are separated by the protruding portion 25.

In this embodiment, the baffle 22 is formed with a projection 25. The second sound hole 23 and the third sound hole 24 are separated by the projection 25 so that the second sound hole 23 and the third sound hole 24 do not communicate with each other in the microphone structure outside the shield case 2. This increases the path through which the microphone receives sound. For example, the sounds received from the two sound holes of the second sound hole 23 and the third sound hole 24 may be the same or different. The received sound enters the second cavity through the second sound hole 23 and the third sound hole 24 to drive the waterproof membrane 3 to vibrate, and the sound is transmitted into the sound sensing element 1.

Alternatively, the second sound hole 23 and the third sound hole 24 are provided on the side of the boss portion 25.

The second sound hole 23 and the third sound hole 24 are provided on the side of the boss portion 25. Thus, the second sound hole 23 and the third sound hole 24 more easily receive the sound entering along the sound channel, and concentrate the entering sound to the second cavity to drive the waterproof membrane 3 to vibrate for sound transmission.

The boss 25 can also form a support for the part of the microphone structure, for example the part of the microphone structure being the housing of the microphone or the housing of the device. After the support is formed, a space in the thickness direction is formed between the shield case 2 and the housing 5. This space is used for the provision of the elastic sealing element 4.

For example, the elastic sealing element 4 is in a compressed state, the amount of compression of the elastic sealing element being defined by the height of the protrusions. The elastic sealing element 4 arranged in the space formed between the protective shell 2 and the outer shell 5 is in a compressed state. As shown in fig. 3, the resilient sealing element 4 is in an uncompressed state. During installation, the elastic sealing member 4 is disposed between the housing 5 and the shield shell 2, and then the elastic sealing member 4 is compressed to bring the housing 5 into contact with the boss 25. This can increase the sealing performance of the elastic sealing member 4. The boss 25 supports the housing 5 to form a space with a set thickness, and the degree of compression of the foam can be adjusted by setting the height of the boss 25.

Optionally, the elastic sealing element 4 is foam or rubber.

The foam and the rubber have elasticity and water-proof performance, and can meet the sealing performance of the elastic sealing element 4. For example, it is possible to prevent foreign substances such as liquid, dust, strong air flow, static electricity, etc. from affecting other elements of the microphone by passing between the shield case 2 and the housing 5.

For example, the foam is VHB foam, and has elasticity. The foam fixed on the protective shell 2 is compressed through the shell 5, so that the structure of the foam is more compact. The degree of compression of the foam is directly proportional to the protective ability, e.g., the tighter the compression the better the water resistance. The bulge 25 supports the shell 5 to form a space with a set thickness, and the degree of the compressed foam can be adjusted by setting the height of the bulge 25, so that the protection performance of the foam can be controlled.

In one embodiment, the plane of the waterproofing membrane 3 is parallel to the radial direction of the first sound hole 14.

In this example, the reliability of the sound sensing element 1 receiving the external sound can be improved. When the plane of the waterproof membrane 3 is parallel to the radial direction of the first sound hole 14, the sound entering from the second sound hole 23 and the third sound hole 24 drives the waterproof membrane 3 to vibrate, and the vibrating waterproof membrane 3 can accurately transmit sound waves along the direction of the first sound hole 14.

For example, the second sound hole 23 and the third sound hole 24 are symmetrically arranged along the axis of the first sound hole 14.

Thus, the transmission paths of the second sound hole 23 and the third sound hole 24 are symmetrical, and can be uniformly transmitted to the position of the waterproof film 3 opposite to the first sound hole 14.

The sound waves enter from the second sound hole 23 and the third sound hole 24 to drive the waterproof membrane 3 to vibrate. The waterproof membrane 3 transmits sound along the direction vertical to the surface where the waterproof membrane is located, air fluctuation in the direction is driven, the sound cavity in the sound sensing element 1 can be accurately transmitted along the first sound hole 14, and sound receiving is effectively achieved.

In one embodiment, the area of the waterproofing membrane 3 is larger than the cross-sectional area of the first sound hole 14.

In this example, the area of the waterproof membrane 3 is larger than the area of the first sound hole 14, which can improve the reliability of sound transmission. The larger the area of the waterproofing membrane 3, the less sound loss due to vibration of the waterproofing membrane 3 during sound transmission. Therefore, the waterproof membrane 3 having an area larger than that of the first sound hole 14 can improve the reliability of sound transmission.

Also, the waterproof membrane 3 may be deformed during vibration or when it is subjected to external pressure. The larger the area of the waterproofing membrane 3, the smaller the force received per unit area. The waterproof membrane 3 is more easily restored to its original state. This can effectively improve the service life and reliability of the waterproofing membrane 3.

According to an embodiment of the present disclosure, there is provided an electronic device including the microphone structure of any one of the above. The elastic sealing element 4 is connected to the housing 5 of the electronic device, and as shown in fig. 2, the second sound hole 23 and the third sound hole 24 are respectively communicated with different sound channels on the housing 5 of the electronic device.

In this embodiment, the second sound hole 23 and the third sound hole 24 are respectively communicated with two different channels of the electronic device, so that the microphone structure is suitable for a two-channel microphone and the device.

The electronic equipment with the microphone structure also has the protection performance of the microphone structure. For example, preventing dust, liquid, strong airflow, static electricity, etc. from affecting the performance of sound sensing elements and other elements within the electronic device.

For example, the electronic device may be a mobile phone, a computer, or the like.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for purposes of illustration and is not intended to limit the scope of the 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 microphone structure, comprising:

a sound sensing element provided with a first sound hole;

2. The microphone structure of claim 1, wherein the shield shell comprises:

3. The microphone structure of claim 2 wherein the baffle is bent outward of the guard cavity to form a protrusion.

4. The microphone structure of claim 3 wherein the baffle of the shield shell is further provided with a third sound hole, and the protrusion separates the second sound hole from the third sound hole.

5. The microphone structure according to claim 4, wherein the second sound hole and the third sound hole are symmetrically arranged along an axis of the first sound hole.

6. The microphone structure according to claim 4, wherein the second sound hole and the third sound hole are provided on a side of the boss.

7. The microphone structure of claim 1 wherein the waterproof membrane lies in a plane parallel to a radial direction of the first acoustic aperture.

8. The microphone structure of claim 1 wherein the resilient sealing element is foam or rubber.

9. The microphone structure of claim 3 wherein the resilient sealing element is in a compressed state, the amount of compression of the resilient sealing element being defined by the height of the boss.

10. The microphone structure of claim 1, wherein the material of the waterproof membrane is ePTFE.

11. An electronic device, comprising the microphone structure as claimed in any one of claims 4 to 6, wherein the elastic sealing element is connected to a housing of the electronic device, and the second sound hole and the third sound hole are respectively communicated with different sound channels on the housing of the electronic device.