JPH08294193A - Microphone mounting structure - Google Patents

Abstract

PURPOSE: To provide a microphone mounting structure which is capable of performing an effective noise cancel for body vibration and internal reverberation in addition to external noise, has a few number of members, is easy to be mounted and is capable of obtaining sufficient fixed strength of the microphone. CONSTITUTION: In the mounting structure of a microphone performing a noise cancel between a main microphone and a sub-microphone, a microphone holder (a microphone gum holder 14, for instance) is provided which holds a main microphone 12a and a sub-microphone 12b at the relative angle in which they does not form a right angular direction with each other. Further, the microphone holder (the microphone gum holder 14, for instance) is composed of a symmetrical shaped integrated elastic member and two microphone are symmetrically fixed with equivalent pressure. Further, a wedge-shaped member (an insulated wedge 19, for instance) is provided which fixes the microphone holder to the body by being pushed into the central part of the microphone holder and being fixed to the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a microphone used in a mouthpiece of a mobile phone.

[0002]

2. Description of the Related Art In a mouthpiece such as a mobile phone 1 shown in FIG. 3, two microphones, a main microphone and a sub microphone, are paired as a twin microphone in order to reduce the influence of external noise on a call. It is used to perform noise cancellation between these two microphones.

The noise canceling method cancels, as noise, vibrations such as external noise that enter through both the main microphone hole and the sub microphone hole opened in the housing and are picked up by both the main microphone and the sub microphone at the same time. That is.

In order to sufficiently obtain the noise canceling effect of this system, 1. The main microphone hole and the sub microphone hole are not on the same surface. 2. The front chamber of the main microphone and the front chamber of the sub microphone have the same capacity. 3. The main microphone hole and the sub microphone hole are installed close to each other. It is necessary.

In order to satisfy the above condition, the conventional microphone mounting structure has a structure as shown in a sectional view of FIG. 4 and an enlarged view of FIG.
Main microphone hole 3 provided near the bottom of the front of the housing 8
The main microphone 2a is provided so as to face a, and the sub microphone 2b is provided so as to face the sub microphone hole 3b provided near the main microphone hole 3a on the bottom surface of the housing 8 which is substantially vertical to the front surface. Therefore, the main microphone 2a and the sub microphone 2b are installed vertically to each other.

FIG. 6 is a front view of a conventional microphone mounting structure, FIG. 7 is a view seen from the direction in FIG. 6, and FIG. 8 is a sectional view taken along the line AA 'in FIG.

As shown in FIG. 8, the method of mounting two microphones is as follows. The sub microphone rubber holder 4b is pressed and fixed by the main microphone rubber holder 4a, and the main microphone rubber holder 4a is pressed by the fixing member 7. It was like fixing it.

[0008]

However, the conventional microphone mounting structure described above has the following drawbacks. That is, when the two microphones are provided at right angles to each other, as shown in FIG. 5, the main microphone diaphragm 6a and the sub microphone diaphragm 6b are also at right angles to each other, and the housing vibration on the surface A is the main microphone. 2a is captured but not captured by the sub microphone 2b, and the case vibration of the surface B is captured by the sub microphone 2b but not by the main microphone 2a. Also,
It happens that even one of the internal reverberation sounds cannot be captured by one of the microphones. This is a major drawback in the method of canceling vibration picked up by both the main microphone 2a and the sub microphone 2b at the same time as noise.

Further, in the mounting method described above, the pressure applied to each part of the rubber holder 4a for the main microphone and the rubber holder 4b for the sub microphone, which are elastic bodies, is not uniform, and, for example, the adhesiveness on the front surface of the microphone causes a difference, and the main microphone is different. Anterior chamber 5
Since the volume of a is different from that of the front air chamber 5b of the sub microphone, the effect of noise cancellation may be reduced. Further, there is a problem that the fixing strength of the microphone cannot be sufficiently obtained although the number of members is large and the mounting procedure is complicated.

The present invention has been made in view of the above problems, and it is possible to effectively cancel not only external noise but also housing vibration and internal reverberation, and the number of members is small, so that mounting is possible. It is an object of the present invention to provide a microphone mounting structure that is easy and can obtain a sufficient microphone fixing strength.

[0011]

In order to solve the above problems, in the microphone mounting structure according to claim 1, a main microphone and a sub microphone are installed close to each other on different surfaces inside the housing. In the mounting structure of, the main microphone (12a) and the sub microphone (1)
2b) and 2b) are fixedly installed by a microphone holder (for example, a microphone rubber holder 14) that holds them at a relative angle that does not form a right angle with each other.

According to a second aspect of the present invention, there is provided the microphone mounting structure according to the first aspect, wherein the microphone holder (for example, the microphone rubber holder 14) is composed of an integral elastic member having a symmetrical shape. The main microphone (12a) and the sub microphone (12b) are symmetrically fixedly installed inside the housing at the same pressure.

In the microphone mounting structure according to claim 3, in the microphone mounting structure according to claim 2, the microphone holder is fixed to the housing by being pushed into the microphone holder and fixedly installed inside the housing. A wedge-shaped member (for example, insulating wedge 19) is provided.

[0014]

In the microphone mounting structure according to the first aspect of the present invention, the main microphone and the sub microphone are held so as not to be perpendicular to each other, so that the main microphone diaphragm and the sub microphone diaphragm are also not perpendicular to each other. . Therefore, the vibration of the housing in any direction and the internal reverberation are always captured by both the main and sub microphones at the same time. Therefore, in the case of the conventional right-angled arrangement, it is possible to solve the problem that the housing vibration in a specific direction and the internal reverberation are not captured by only one microphone and are not canceled. A microphone mounting structure capable of effectively canceling body vibration and internal reverberation can also be provided.

In the microphone mounting structure according to the second aspect of the invention, the main microphone and the sub microphone are constituted by a microphone holder composed of an integral elastic member having a symmetrical shape,
Since they are symmetrically fixed with the same pressure, the installation conditions of both microphones can be easily equalized.

Therefore, in addition to the function of the microphone mounting structure according to the first aspect, the front surface of the main microphone and the front air chamber of the sub microphone can be kept in the same capacity by making the adhesion of the front surface of the microphone equal. A microphone mounting structure capable of effective noise cancellation can be provided. In addition, this microphone mounting structure has a small number of members and is easy to mount.

In the microphone mounting structure according to the third aspect of the invention, the microphone holder is fixed by pushing in a wedge-shaped member, and the wedge-shaped member is fixed to the housing.

Therefore, in addition to the function of the microphone mounting structure according to the second aspect, sufficient microphone fixing strength and front adhesion can be obtained with a small number of members and easy mounting, and the microphone is not easily affected by the vibration of the housing. It can be a mounting structure.

[0019]

Embodiments of the microphone mounting structure according to the present invention will be described below with reference to the drawings.

FIG. 1 is an external perspective view of the microphone mounting structure of this embodiment, and FIG. 2 is a sectional view of the microphone mounting structure of this embodiment.

The microphone mounting structure of this embodiment has a symmetrically shaped microphone rubber holder 14 for holding the main microphone 12a and the sub microphone 12b.
Insulation wedge 1 that pushes 4 against housing 18 to fix
9, a wedge fixing boss 20 for fixing the insulating wedge 19 to the housing 18, and a fixing portion 17 for fixing the microphone rubber holder 14.

Inside the microphone rubber holder 14, as shown in FIG. 2, a main microphone 12a and a sub microphone 12b are provided.
Is formed symmetrically to hold the main microphone 12a and the sub microphone 12b when mounted, and the main microphone 12a and the sub microphone 12b are fitted into the mold through the opening 14a on the front surface of the microphone rubber holder 14. In addition, a notch for pushing the insulating wedge 19 is formed in the center of the front surface of the microphone rubber holder 14.

The fixing portion 17 and the wedge fixing boss 20 are formed in a projection shape in advance when the housing 18 is formed.
The insulating wedge 19 has an insulating surface in consideration of contact with the rear surface of the microphone, and a hole for inserting the wedge fixing boss 20 is formed on the bottom surface.

The mounting procedure of the microphone mounting structure of this embodiment is as follows.
It looks like this: That is, 1. 1. Insert the main microphone 12a and the sub microphone 12b from the opening 14a on the front surface of the microphone rubber holder 14 and fit into the internal storage mold. 2. Fit the microphone rubber holder 14 into the fixed portion 17. 3. Insert the insulating wedge 19 into the notch at the center of the front of the microphone rubber holder 14 and push it in. The insulating wedge 19 is fixed to the wedge fixing boss 20 through the hole on the bottom surface.

In the above-mentioned microphone mounting structure, the main microphone 12a and the sub microphone 12b are held so as not to form a right angle direction, so that the main microphone diaphragm 16a and the sub microphone diaphragm 16b also do not form a right angle direction. . Therefore, the main microphone 12 is not always affected by the vibration of the housing and the internal reverberation in any direction, even if the level is different.
a and the sub microphone 12b are both taken in,
Noise cancellation works. Therefore, in addition to the external noise, it is possible to provide the microphone mounting structure capable of effectively canceling the noise of the housing vibration and the internal reverberation.

Further, the main microphone 12a and the sub microphone 1
2b and the integrated microphone rubber holder 1 having a symmetrical shape
According to 4, symmetrically fixedly installed in the housing with the same pressure, the installation conditions of both microphones can be easily made equal. Therefore, the front surface of the main microphone chamber 15a and the front space of the sub microphone chamber 15b can be kept to have the same capacity, and the microphone mounting structure can be effectively performed.

In addition, since the wedge-shaped member is pushed into the center of the microphone rubber holder 14, sufficient microphone fixing strength and front adhesion can be obtained, and the microphone mounting structure is less susceptible to the vibration of the housing. Can be

Further, as described above, the present microphone mounting structure has a small number of members and the mounting procedure is simple.

Needless to say, the present invention is applicable not only to mobile phones but also to microphones for telephones, transceivers, and other general microphones.

[0030]

In the microphone mounting structure according to the first aspect of the present invention, in addition to external noise, housing vibration and internal reverberation are always taken in by both the main microphone and the sub microphone. A microphone mounting structure that can effectively cancel the noise of all internal echoes can be provided.

In the microphone mounting structure according to claim 2, in addition to the effect of the microphone mounting structure according to claim 1, the installation conditions of both microphones can be easily made equal, and the adhesion on the front surface of the microphone is made equal. As a result, the front air chamber of the main microphone and the front air chamber of the sub microphone can be kept at the same capacity, so that a microphone mounting structure capable of effective noise cancellation can be obtained. Further, the number of members can be reduced and the mounting can be facilitated.

In the microphone mounting structure according to claim 3, in addition to the effect of the microphone mounting structure according to claim 2, sufficient microphone fixing strength and front adhesion can be obtained with a small number of members and easy mounting. The microphone mounting structure is less likely to be affected by body vibration.

[Brief description of drawings]

FIG. 1 is an external perspective view of a microphone mounting structure of the present embodiment.

FIG. 2 is a cross-sectional view of a microphone mounting structure of this embodiment.

FIG. 3 is an external perspective view of a mobile phone.

FIG. 4 is a cross-sectional view of a conventional mobile phone.

FIG. 5 is an enlarged view of a mouthpiece portion of a cross-sectional view of a conventional mobile phone.

FIG. 6 is a front view of a conventional microphone mounting structure.

FIG. 7 is a view seen from the direction in FIG.

8 is a cross-sectional view taken along the line A-A 'in FIG.

[Explanation of symbols]

 12a Main microphone 12b Sub microphone 14 Microphone rubber holder (microphone holder) 19 Insulated wedge (wedge-shaped member)

Claims (3)

[Claims] 1. In a microphone mounting structure in which two microphones, a main microphone and a sub microphone, are installed close to each other on mutually different surfaces inside a housing, the main microphone and the sub microphone are placed at right angles to each other. A microphone mounting structure characterized by being fixedly installed inside a housing by a microphone holder that holds a relative angle that does not occur. 2. The microphone holder is composed of an integral elastic member having a symmetrical shape, and the main microphone and the sub microphone are fixedly installed inside the solid body at symmetrically equal pressure. The microphone mounting structure according to item 1. 3. The microphone according to claim 2, further comprising a wedge-shaped member that is fixed to the housing by being pushed into the microphone holder and fixedly installed inside the housing. Mounting structure.