CN103096196B - Bone-conduction microphone - Google Patents

Abstract

The present invention provides a bone conduction microphone, specifically, the microphone includes a housing, a cover connected to the housing, a pickup disposed in the housing, a connecting cylinder is arranged in the housing, and the pickup is installed in the connecting cylinder. With this structure, the vibration on the housing can be prevented from being transmitted to the pickup through the shielding of the housing, thereby preventing the generation of noise and improving sound clarity.

Description

bone conduction microphone

technical field

The invention relates to a bone conduction microphone.

Background technique

General microphones use air conduction and are open. Although they can obtain good sound quality, the biggest disadvantage is that they cannot isolate the external background sound source. When talking in a noisy environment, they cannot filter the ambient noise, causing inconvenience to the user. Compared with the microphone that uses air conduction for detection, the bone conduction microphone has stronger anti-noise ability because it is attached to the user's skull and detects the vibration of the skull when the user speaks through bone conduction.

The Chinese patent with the authorized notification number CN2814852Y discloses a bone conduction microphone, wherein the microphone and the vibrating surface are connected to each other through a shell, and the vibrating surface and the shell are flexibly connected to form a bone conduction microphone between the vibrating surface and the sound pickup surface of the microphone. Airtight chamber structure. Therefore, the vibrating surface is in close contact with the user's skin, and when the user makes a sound, the vibration of the skull is conducted to the vibrating surface through the bone, and then transmitted to the sound-picking surface through the air in the airtight chamber to be detected by the microphone. Since the air in the airtight chamber is isolated from the outside world, it has strong anti-noise ability to the noise transmitted by the air. But this structure does not prevent the noise transmitted by the casing. That is, vibrations acting on the housing such as touching the housing will cause air vibration in the airtight chamber to be detected by the microphone in the form of sound and become ambient noise.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a bone conduction microphone that can effectively shield various environmental noises and improve sound clarity.

In order to achieve the above object, the first technical solution of the present invention is a bone conduction microphone, comprising a housing (10) and a pickup (30), characterized in that, the installation wall (11) of the housing (10) is provided with The vibrating surface (60) that is in contact with the user's skin, a protruding connecting cylinder (21) is formed on the inner side of the installation wall (11) corresponding to the vibrating surface (60), and the connecting cylinder (21) is connected to the vibrating surface (60). The side wall (12) of the shell (10) keeps a certain interval, and the pickup (30) is installed in the connecting cylinder (21) and keeps sealing between the connecting cylinder (21), and the pickup of the pickup (30) There is a certain gap between the sound surface facing the installation wall (11) and the installation wall (11).

Since the pickup (30) is installed in the connecting cylinder (21) and remains sealed between the connecting cylinder (21), and the pickup surface of the pickup (30) faces the installation wall (11) and there is a gap between the installation wall (11) A certain gap. That is, an airtight air chamber structure is formed between the sound pickup (30) and the installation wall (11), so the vibration of the skull when the user makes a sound can be detected by contacting the vibrating surface (60) with the user's skin, thereby achieving the purpose of detecting sound. Purpose. Since the pickup (30) and the connecting cylinder (21) are arranged inside the shell (10), that is, the shell (10) plays a shielding role to prevent noise generation and improve sound clarity.

In the second technical solution, there is also a cover (40), the open end of the housing (10) is closed by the cover (40), and the connecting cylinder (21) and the inside of the housing (10) The sound pickup (30) is kept at a certain distance from the cover (40).

Since the open end of the housing (10) is closed by the cover (40), that is, the inside of the housing (10) is in a closed state, the shielding effect is strengthened to further prevent noise and improve sound clarity.

In the third technical solution, the housing (10) is a bottomed cylindrical part, the bottom of the housing (10) is the installation wall (11), and the Connect the cylinder (21).

Since the casing (10) is a circular component, it is especially suitable for communication devices such as mobile phones.

In the fourth technical solution, the vibrating surface (60) is a protruding surface protruding outward.

Since the vibrating surface (60) is a protruding surface protruding outward, it can better maintain contact with the user's skin.

In the fifth technical solution, the vibrating surface (60) is spherical.

Since the vibrating surface (60) is spherical, it not only can maintain better contact with the user's skin, but also is not limited by the contact position.

In the sixth technical solution, a lead port (50) is formed on the side wall (12) of the housing (10), and the signal line (51) of the pickup (30) is drawn out from the lead port (50) .

Since the signal line (51) of the sound pickup (30) is led out from the side wall (12) of the casing (10), the arrangement of the cable and the bone conduction microphone becomes easy.

In the seventh technical solution, a connection boss (13) is formed on the side wall (12) of the casing (10), and a step portion (41) is formed on the cover (40), through which the boss (13) ) and the step portion (41) are engaged to fix the cover (40) on the housing (10).

Since the casing (10) and the cover (40) are fastened through the boss (13) and the stepped portion (41) to achieve the purpose of installation and closure, it has the effects of simple structure, convenient installation and high sealing degree.

In the eighth technical solution, the housing (10) and the connecting cylinder (21) are integrally injection molded.

Since the casing (10) and the connecting cylinder (21) are integrally injection-molded, it has the effect of low cost.

In the ninth technical solution, the sound pickup (30) is a condenser microphone.

Since the pickup (30) is a condenser microphone, it has the effect of simple structure and clear sound.

In the tenth technical solution, the sound pickup (30) is an electret microphone.

Because the pickup (30) is an electret microphone, it has a lower cost in addition to simple structure and clear sound.

Description of drawings

FIG. 1 is an exploded cross-sectional view of a bone conduction microphone.

detailed description

The specific embodiment will be described in detail below with reference to FIG. 1 .

The bone conduction microphone of the present invention is applicable to any type of communication device capable of communicating over one or more public or private communication networks, e.g., cellular telephones, web-enabled cellular telephones, personal digital assistants (PDAs), handheld computers , Bluetooth wireless headsets, digital cameras, other types of portable computing and Internet access equipment and devices, etc. Due to the uncertainty of the use environment of this type of communication device, the microphone not only needs to have high sound clarity but also has the ability to shield various environmental noises.

FIG. 1 is an exploded sectional view of a bone conduction microphone. The bone conduction microphone 1 includes a housing 10 , a pickup 20 and a cover 40 . The housing 10 is a cylindrical member with a bottom, and a connection boss 13 is formed on the side wall 12 of the housing 10, and a step portion 41 is formed on the cover 40, and the housing 10 and the cover 40 pass through the boss. 13 and the step portion 41 are interlocked and connected together. Adhesive can be applied between the boss 13 and the stepped portion 41 to make the connection between the housing 10 and the cover 40 more firm and achieve a sealing effect.

At the central position of the bottom 11 of the casing 10 is provided a vibrating surface 60 which is in contact with the user's skin, and its size is equivalent to that of the sound pickup 20 . A protruding connecting cylinder 21 is formed on the inner side of the bottom 11 corresponding to the vibrating surface 60 , and the inner diameter of the connecting cylinder 21 is slightly larger than the outer diameter of the pickup 20 . The connecting cylinder 21 is perpendicular to the bottom 11 and keeps a certain distance from the side wall 12 of the casing 10 and the cover 40 . That is, in the present embodiment, the bottom 11 functions as an installation wall for installing the pickup 20 .

The pickup 30 is an electret microphone, installed in the connecting cylinder 21, bonded with the connecting cylinder 21 by the adhesive 20, and sealed by the adhesive 20 between the two, the pickup surface of the pickup 30 faces the bottom 11 and the bottom 11 There is a certain gap between them, that is, an airtight air chamber structure is formed between the sound pickup surface of the pickup 30 and the bottom 11 . Therefore, when the vibrating surface 60 is in contact with the user's skin, the vibration of the vibrating surface 60 caused by the vibration of the skull when the user makes a sound can be transmitted to the sound pickup surface of the pickup 30 by the vibration of the air in the air chamber, and the pickup 30 Check out. The vibrating surface 60 is an outwardly protruding spherical surface, and the inner side of the vibrating surface 60 is also an outwardly protruding spherical surface, that is, the vibrating surface 60 of the bottom 11 has a thick middle and thin edges.

A wire opening 50 is formed on the side wall 12 of the housing 10 , and the signal line 51 of the pickup 30 is led out from the wire opening 50 . The casing 10 and the connecting cylinder 21 are integrally formed by injection molding, and the cover 40 is also formed by plastic injection molding.

It can be seen from the above that since the bone conduction microphone of the present invention is a circular component, it occupies a small volume during installation and is convenient for installation in a communication device.

Since the sound pickup surface of the sound pickup 30 and the vibrating surface 60 is a closed air chamber structure, the noise conducted through the air is shielded, and the sound can be clearly detected even in a noisy environment.

Since the opening end of the housing 10 is closed by the cover 40 , that is, the inside of the housing 10 is in a closed state, the shielding effect is enhanced to further prevent noise and improve sound clarity.

Since the vibrating surface 60 is spherical, it not only can maintain better contact with the user's skin, but also is not limited by the contact position.

Since the signal line 51 of the sound pickup 30 is led out from the side wall 12 of the housing 10 , it is easy to arrange the line and the communication device.

Since the casing 10 and the connecting cylinder 21 are integrally injection molded, it has the effect of low cost.

Since the pickup 30 is an electret microphone, it has a lower cost in addition to simple structure and clear sound.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For example, the housing 10 may also be in the shape of a rectangle, a D shape, or a trapezoid. The housing 10 and the cover 40 can also be made of non-conductive materials such as flexible materials or ceramics. At the intersection of the bottom 11, the vibrating surface 60, and the connecting cylinder 21, a flexible connection can also be used to connect the three into one from the material or structure, so that the transmission of the vibration on the housing 10 can be better avoided. Insert the pickup 30 to prevent the generation of noise. The seal between the cover 40 and the housing 10 may also adopt other fixing structures, such as bolt structures, adsorption structures, and the like. For another example, the above-mentioned casing 10 and the boss 60 provided on the casing 10 may also be implemented with other structures. For another example, the vibrating surface 60 can also be realized by using other structures and surface shapes such as plane and honeycomb surface.

In a word, within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc. shall be included in the protection scope of the present invention.

Claims (9)

1. a kind of bone-conduction microphone, including housing (10), sound pick-up (30), it is characterised in that the installation of the housing (10) Wall (11) is provided with the vibration plane (60) with user's skin contact, inner side and the vibration plane (60) of the assembly wall (11) The side wall (12) of connecting cylinder (21) of the corresponding position formed with projection, connecting cylinder (21) and the housing (10) keeps certain Interval, the sound pick-up (30) is arranged in the connecting cylinder (21) keeps sealing, the sound pick-up between connecting cylinder (21) (30) pickup face is towards having certain gap between the assembly wall (11) and the assembly wall (11)；

The bone-conduction microphone also has capping (40), and the openend of the housing (10) is by capping (40) closing, institute State the internal connecting cylinder (21) of housing (10) and the sound pick-up (30) and keep certain interval, the shell with the capping (40) The inside of body (10) is in closed state.

2. bone-conduction microphone according to claim 1, it is characterised in that the housing (10) is cylindrical part with the end Part, the bottom of the housing (10) is the assembly wall (11), and the connecting cylinder (21) is formed in the middle position of the bottom.

3. bone-conduction microphone according to claim 2, it is characterised in that the vibration plane (60) is dashed forward for outstanding The face of rising.

4. bone-conduction microphone according to claim 3, it is characterised in that the spherical shape of the vibration plane (60).

5. bone-conduction microphone according to claim 4, it is characterised in that the shape in the side wall (12) of the housing (10) Into leaded mouth (50), the signal wire (51) of the sound pick-up (30) is drawn by the lead wire outlet (50).

6. bone-conduction microphone according to claim 5, it is characterised in that in the side wall (12) of housing (10) formed with Boss (13) is used in connection, formed with stage portion (41) in capping (40), is interlocked by the boss (13) and stage portion (41) Capping (40) is fixed on housing (10).

7. bone-conduction microphone according to claim 6, it is characterised in that the housing (10) and the connecting cylinder (21) Integrated injection molding.

8. according to the bone-conduction microphone described in claim 1 to 7 any one, it is characterised in that the sound pick-up (30) is Condenser microphone.

9. bone-conduction microphone according to claim 8, it is characterised in that the sound pick-up (30) is that electret is transaudient Device.