JP3113832B2 - Microphone holder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a portable telephone and the like.
The present invention relates to a microphone holder for holding a microphone in an information terminal for voice communication, in particular, to prevent noise from being mixed into the microphone and facilitate installation of the microphone.

[0002]

2. Description of the Related Art Conventionally, in information terminals such as mobile phones,
In order to convert sound into an electric signal, an electret condenser microphone (ECM) using an electret as a diaphragm is often used. In this ECM, a diaphragm made of an electret and an electrode face each other to form a capacitor, and displacement between the diaphragm and the electrode due to sound pressure is converted into an electric signal.

FIG. 5 shows a conventional portable telephone in which the ECM is incorporated, in which the upper case 54 is detached from the lower case 56 and is disassembled. The upper case 54 has E
A small hole 54a, which is a sound entrance to the CM 51, is provided.
The upper case 54 is attached at a position centered on the small hole 54a. On the lower surface of the ECM 51, + and-electrodes are led out, and two lead wires 52 are electrically connected to these electrodes.

A circuit board 53 is fixed to the lower case 56,
An EC for transmitting the output signal of the ECM 51 is provided on the circuit board 53.
An M land 53a is provided, and the lead wire 52 of the ECM 51 is soldered here. A sounding body 57 such as a speaker or a buzzer, and a vibrator 58 that transmits an incoming radio wave to a human body by vibration are arranged on the circuit board 53 and in the case.

FIG. 4 is a sectional view showing an attached state of the ECM 41. The microphone holder 45 that houses the ECM 41 is configured to cover the outer periphery of the side surface of the ECM 41 and the periphery of the upper surface and the lower surface. The center of the upper surface of the ECM 41 is used for inputting sound, and the center of the lower surface of the ECM 41 is used for leading out the lead wire 42.
No cover by 45 is provided.

An annular positioning rib having a small hole 44a as a center is formed integrally with the upper case 44, and a microphone holder 45 accommodating the ECM 41 is pushed into and fixed in the annular positioning rib. The other end of the lead wire 42 soldered to the lower surface of the ECM 41 is electrically connected to the ECM land 43a of the circuit board 43 fixed to the lower case 46. This electrical connection is generally soldered by hand soldering.

[0007] The connection between the ECM and the circuit board is widely used in portable telephones and the like because the connection by a lead wire is relatively inexpensive and the reliability of electrical conduction can be ensured.

[0008]

In an information terminal for voice communication such as a portable telephone, if a sound leaking from the sounding body 57 into the case is detected by the ECM 51, howling is caused. Further, the vibration of the upper case 54 and the lower case 56 due to an external impact, or the vibration of the sounding body 57 and the vibrator 58 is transmitted through the circuit board 53, and when detected by the ECM 51, vibration noise is generated. Therefore, it is required to cut off the acoustic connection between the sounding body 57 and the ECM 51 and to suppress transmission of generated vibration noise to the ECM 51.

However, in the conventional ECM mounting structure, E
If there is an uneven gap between the ECM 41 and the microphone holder 45 with the CM 41 and the microphone holder 45 fitted, the sound leaking from the sound generator 57 into the case will be a hole on the lower surface of the microphone holder 45. From the ECM 41, reaches the upper surface of the ECM 41 through the gap, and is detected by the ECM, causing a problem of howling.

The vibration of the upper case 54 and the lower case 56 or the vibration of the sounding body 57 and the vibrator 58 due to an external impact is transmitted to the circuit board 53, and this vibration is transmitted through the
There is a problem that vibration noise is transmitted to the CM 51 and detected by the ECM.

Further, when connecting the ECM lead wire 52 to the ECM land 52a of the circuit board 53, it is not suitable for automatic assembly, so it is necessary to perform manual soldering, thereby reducing the number of steps and the number of parts. There is a problem that it is difficult.

The present invention has been made to solve such a conventional problem and suppresses howling and vibration noise.
It is another object of the present invention to provide a microphone holder that enables automatic assembly.

[0013]

Therefore, in the microphone holder of the present invention, a microphone accommodating portion for accommodating the microphone and made of an elastic member, and an output signal of the microphone accommodated in the microphone accommodating portion are transmitted to the microphone accommodating portion. and a connection terminal unit that derives the outside provided through the bottom, integrally formed and a connection terminal portion the microphone housing portion
Is shaped .

This eliminates the need for a lead-out hole on the back of the microphone holder, which is provided in the microphone holder, and improves the sealing between the microphone and the microphone holder. Therefore,
The acoustic connection between the microphone and the sounding body and the transmission of vibration to the microphone are cut off, and howling and vibration noise are effectively suppressed.

Further, automation in the assembling process becomes possible, and the number of steps and the number of parts can be reduced.

[0016]

DETAILED DESCRIPTION OF THE INVENTION The invention according to claim 1 of the present invention is a microphone holder for holding a microphone and attaching it to a terminal device, wherein the microphone is accommodated.
A microphone accommodating portion made of an elastic member, and a connection terminal portion for leading an output signal of the microphone accommodated in the microphone accommodating portion to the outside through the bottom of the microphone accommodating portion are provided, and the microphone accommodating portion and the connection terminal portion are integrally formed.
Since the microphone is hermetically held in the microphone housing, acoustic connection and vibration transmission can be cut off, and howling and vibration noise can be suppressed.

According to a second aspect of the present invention, the connection terminal portion is constituted by an elastic member and a conductor embedded in the elastic member, and the connection terminal portion is formed integrally with the microphone housing portion. Thus, the number of parts in assembling can be reduced.

According to a third aspect of the present invention, one end of the connection terminal portion is in pressure contact with an electrode of a microphone accommodated in a microphone accommodation portion, and the other end is in pressure contact with a conductor of a circuit board, so that the output of the microphone is output. It is designed to lead out to the circuit of the circuit board, and when assembling the microphone into the terminal device, the continuity of the microphone output is carried out by an automatic assembly method in which the microphone holder containing the microphone is sandwiched between the boards instead of hand soldering. As a result, the number of steps and the number of parts can be reduced.

According to a fourth aspect of the present invention, a microphone is provided.
A microphone housing portion made of an elastic member for housing,
The output signal of the microphone housed in the microphone housing
Out through the bottom of the microphone housing
Microphone holder with integrated connection terminals
Connected to the connection terminal of the microphone holder.
An information terminal device provided with a circuit board, which can easily mount an ECM frequently used in an information terminal, and can improve reliability by eliminating howling and vibration noise.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) As shown in FIG. 1, a microphone holder according to a first embodiment includes a microphone holder section 12 for accommodating an ECM and an EC for accommodating the ECM.
A connection terminal portion 11 for deriving an electric signal from M is integrally formed of an elastic body such as rubber.

The microphone holder 12 has a shape in which the bottom of the cylinder is closed and an annular inner edge is formed on the upper surface of the cylinder. Therefore, the opening of the microphone holder 12 exists only on the upper surface of the cylinder.

The connection terminal portion 11 has a rectangular protrusion protruding from both sides of the bottom surface of the microphone holder portion 12,
A large number of metal wires extending parallel to the direction penetrating the bottom surface are embedded on the center line (on the line AA) of the protrusion. The connection terminal portion 11 constitutes a “press-connecting connector”, and the metal wires arranged at high density are formed of an electric conductor contacting the end face of one of the protrusions of the connection terminal portion 11 and the other of the protrusions. It serves to conduct the electrical conductor that contacts the end face. Gold plating is applied to the metal wire in order to reduce the contact resistance between the conductor and the contacting conductor and to prevent corrosion or the like of the contact portion due to an environmental change.

The rubber material of the microphone holder includes:
Silicone rubber with low hardness, low temperature dependence and excellent insulation properties is used.

The ECM is a microphone holder
The 12 openings are pushed open against elasticity and housed therein.
At this time, the inner edge of the upper surface of the microphone holder 12 is
The stored ECM is elastically pressed. Therefore, E
The lower surface of the CM is pressed against an end face of a protruding portion of the connection terminal (press-connecting connector) 11 protruding into the microphone holder 12.

FIG. 2 shows a state in which the ECM 21 is housed in the microphone holder 22 containing the press-connecting type connector 22a and is incorporated in the information terminal device.

The upper case 24 has a small hole 24 serving as a sound entrance.
An annular positioning rib centered at a is formed integrally, and the microphone holder 22 containing the ECM 21 is pushed into and fixed in the annular positioning rib.
On the lower surface of ECM21, land 21a with + in the center and-on the periphery
Are formed concentrically, and the electric signal output to this electrode is led out of the microphone holder 22 through the metal wire of the press-connecting connector 22a.

On the other hand, the circuit board 23 fixed to the lower case 25
In the position corresponding to the land 21a of the ECM 21,
An ECM land 23a having the same shape as the land 21a is formed. This ECM land 23a has a press-connecting connector 22
Gold plating is applied for the same reason as the metal wire of a.

When the upper case 24 and the lower case 25 are fitted, the press-connecting connector 22a of the microphone holder 22 presses against the ECM land 23a of the circuit board 23. Therefore, the positive electrode of the ECM 21 is electrically connected to the positive ECM land 23a of the circuit board 23 through the metal wire of the press-connecting connector 22a, and the negative electrode of the ECM 21 is connected to the negative electrode of the circuit board 23 through the metal wire of the press-connecting connector 22a. It is electrically connected to the ECM land 23a.

As described above, when this microphone holder is used, only by tightening the upper case 24 and the lower case 25, it is possible to pass through the metal wire of the press-connecting connector portion 22a.
ECM land 21a and ECM land 23 on circuit board 23
a can be ensured.

Also, depending on the shape and material of the microphone holder, the ECM 21 and the microphone holder 22
Since it is possible to secure the hermeticity between them, it is possible to prevent howling and suppress vibration noise.

In this embodiment, the microphone
Although a pressure contact type connector is incorporated as a connection terminal of the holder, other connection terminals such as a spring can be incorporated in the microphone holder.

(Second Embodiment) In a second embodiment, a configuration will be described in which a microphone is housed in the microphone holder of the first embodiment and a terminal device is automatically assembled.

In the terminal device, as shown in FIG. 3, a small hole 31a serving as a sound entrance is provided in an upper case 31 constituting a housing.
The positioning rib 31b of the microphone holder 32 and the boss for receiving the screw 35 are provided. The circuit board 33 on which the ECM land 33a is formed is provided with a hole for inserting the screw 35. The lower case 34 constituting the housing is also provided with a hole through which the screw 35 is inserted.

In assembling, first, the microphone holder 32 containing the ECM is inserted into the positioning rib 31b of the upper case 31, and then the circuit board 33 and the lower case 31 are inserted.
34 is overlapped, and the tightening screw 35 is tightened to fix the whole.

By this tightening, the connection terminal of the microphone holder 32 comes into contact with the ECM land 33a on the circuit board 33, and conduction between the microphone housed in the microphone holder 32 and the ECM land 33a on the circuit board 33 is performed. Can be secured.

As described above, in this terminal device, the assembling work can be automated, and the number of steps and the number of parts can be reduced.

In each of the embodiments, the microphone holder for accommodating the ECM has been described. However, a holder for accommodating other types of microphones may be provided with the same configuration.

As a material for forming the microphone holder of the present invention, not only rubber but also a material having a suitable elastic hardness can be used.

[0040]

As is apparent from the above description, the microphone holder of the present invention can stably hold a microphone within a limited size, and can prevent howling and reduce vibration noise. A high effect can be exhibited for suppression.

Further, the incorporation into the terminal device can be automated, and the man-hour and the number of parts in assembling the device can be reduced.

[Brief description of the drawings]

FIG. 1 is an external view and a sectional view of a microphone holder according to a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of a transmitting unit of the information terminal in which the microphone holder according to the first embodiment is stored.

FIG. 3 is an exploded view showing an automatic assembling procedure of the information terminal according to the second embodiment of the present invention;

FIG. 4 is a cross-sectional view showing a mounting state of an ECM by a conventional microphone holder.

FIG. 5 shows an ECM using a conventional microphone holder.
FIG. 2 is an exploded view showing an information terminal to which is attached.

[Explanation of symbols]

 11, 22a Connection terminal part (pressure-contact type connector) 12, 22b Microphone holder part 21, 41, 51 ECM 21a ECM land 22, 32, 45, 55 Microphone holder 23, 33, 43 Circuit board 23a, 33a, 43a , 53a ECM lands 24, 31, 44, 54 Upper case 24a, 31a, 44a, 54a Small hole 25, 34, 46, 56 Lower case 31b Positioning rib 35 Tightening screw 42, 52 Lead wire 57 Sound generator 58 Vibration Child

Claims (4)

(57) [Claims] 1. A microphone holder for holding and attaching a microphone to a terminal device, the microphone holder comprising an elastic member for accommodating the microphone, and an output signal of the microphone accommodated in the microphone accommodating unit. A connection terminal part which is led out through the bottom of the microphone housing part, wherein the microphone housing part and
A microphone holder, wherein the connection terminal portion is integrally formed . 2. The microphone according to claim 1, wherein the connection terminal comprises an elastic member and a conductor embedded in the elastic member, and the connection terminal is formed integrally with the microphone housing. Microphone holder according to. 3. The connection terminal portion is pressed at one end with an electrode of a microphone housed in the microphone housing portion and is pressed at another end with a conductor of a circuit board to output the output of the microphone to the circuit board. The microphone holder according to claim 1, wherein the microphone holder is led to a circuit. 4. An elastic member for accommodating a microphone.
Microphone housing and the microphone housing
The output signal of the received microphone is collected by the microphone.
The connection terminal that leads out through the bottom of the
Shaped microphone holder and the microphone
Circuit board connected to the
An information terminal device characterized by the following.