JP2001086027A - Microphone for communication device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a small and inexpensive microphone by preventing the dust from entering in the inward direction set to a 1st barrier plate that is placed between an inner switch and a pressing end part which can press the inner switch from a side opening part of a lower case and also in the direction of an upper case set to a 2nd barrier plate that covers the 1st barrier plate through the opening part. SOLUTION: A momentary switch 33 and a leaf spring 4 that is attached to the inner side of a press-to-talk switch 3 are placed opposite to each other so as to hold a rubber contact 56 which is fit close in a rubber contact socket 31a existing at a recess part of a dustproof wall 31 and functions a lateral plug between the switch 33 and the spring 4. A dustproof packing 50 consists of an upper packing 51 serving as a 2nd barrier plate, the contact 56 and a coupling part 55 which connects the packing 51 to the contact 56. The packing 50 has a planar shape and produced at a low cost. The contact 56 is fit close and inserted in the socket 31a. In such a constitution, the dust never enters a dustproof chamber 30 incorpated with the board 34.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone for a communication device used for a vehicle-mounted or portable communication device.

[0002]

2. Description of the Related Art As a conventional communication device microphone used in a vehicle-mounted or portable communication device, a microphone disclosed in Japanese Patent Application Laid-Open No. 9-139691 as shown in FIG. 7 is known. . The communication of the communication device 1 is performed using the press talk switch 3 of the microphone 2. When the press talk switch 3 is pressed, a call can be made from this side, and when the press talk switch 3 is released, the call of the other party can be heard. Thus, the press talk switch 3 is a movable part that is pressed many times during a call.

The press talk switch 3 does not have to be merely mechanically pressed, and it is preferable that when the press talk switch 3 is pressed, a tactile click is produced. For this reason, the press talk switch 3
To the internal switch through the leaf spring,
A long stroke is secured by increasing the distance that the press-talk switch 3 is pushed.

On the other hand, a microphone for a communication device is required to be usable even in a place where dust is blown. For this reason, many microphones are provided with dustproofing measures. FIG. 8 to FIG. 10 are diagrams showing a conventional microphone that takes a dustproof measure.

As shown in FIG. 9, the microphone 2 shown in FIG.
A lower case 20 below the upper case 10 includes a dustproof room 30 for storing a circuit board of the microphone 2 and a dustproof wall 3.
1 and a non-dust-proof room 40 for storing a part of the press-talk switch is provided next to the dust-proof room 30 with the dust-proof wall 31 interposed therebetween. The dustproof wall 31 is provided with a presstalk switch window 32 so that one end of the presstalk switch can be moved to press an internal switch inside the dustproof chamber 30.

FIG. 10 is a cross-sectional view of the non-dustproof chamber 40 side as viewed from the direction of the arrow indicated by A in FIG. As shown in FIG. 10, the packing 2 for dust protection is provided substantially at the center of the dustproof wall 31.
5 is fitted. As for an internal switch (not shown) in the dustproof room 30, a press talk switch inserted and arranged in the non-dustproof room 40 through the opening 3 a is pressed via the packing 25.

[0007]

However, the conventional microphone 2 as described above has the following problems. In a conventional microphone, the following two methods are adopted as a method for ensuring dustproof while securing a high stroke of the press talk switch. One is FIG.
A dustproof wall 31 is provided on the side of the lower case 20 shown in FIG.
In this method, the inner wall of the upper case 10 and the dustproof wall 31 are joined at the position B shown in FIG. The other is a method in which the dust-proof wall 31 is divided into upper and lower halves, integrally formed on the upper case 10 and the lower case 20, respectively, and then assembled at a position C shown in FIG.

In the former case, a hole is formed in the dust-proof wall 31, and a window 32 for the press-talk switch is provided. For this reason, processing of the lower case 20 is troublesome, and the manufacturing cost is increased. On the other hand, in the latter case, there is a problem that the dustproof walls 31 in the upper and lower directions, which are divided in half, do not mesh with each other, so that a slight gap is generated and the dustproof effect is reduced. For this reason, dust control tests (MIL-STD-
810D) is difficult to produce with good yield.

Further, as shown in FIG.
And the lower case 20 are separated by the dustproof wall 31, the operation buttons and the circuit board therefor cannot be provided in the upper case 10 located above the non-dustproof room 40 side. For this reason, it is necessary to arrange the operation buttons and the like close to the dust-proof room 30 side, and the appearance is deteriorated. When trying to balance the arrangement of the operation buttons in order to improve the appearance,
Since it is necessary to provide an extra space on the side opposite to 0, there is a problem that the size of the microphone is increased.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a small and low-cost microphone for a communication device which has a high stroke of a press-talk switch, is excellent in dustproofness, and is low in cost.

[0011]

According to a first aspect of the present invention, there is provided a microphone for a communication device, wherein an upper case and a lower case are joined to each other to house a circuit board therein. And a call button in which a pressing end that can press an internal switch that is pressed inside the lower case and is pressed at the time of a call is inserted into the lower case from an opening opened on the side of the lower case, and is disposed in the lower case. , A first partition provided between the pressing end and the internal switch, and a call button driving chamber surrounded by a second partition covering the first partition from the opening, and a call button drive chamber surrounded by the second partition and the second direction. The direction of the case above the partition is made dust-proof. For this reason, the non-dustproof area can be provided only on the side of the lower case of the main body. Therefore, the upper case and the lower case can be easily formed, and no gap is generated due to poor engagement between the upper case and the lower case.

According to a second aspect of the present invention, in the microphone for a communication device according to the first aspect, the second partition is detachable from the lower case, and is located on a line connecting the pressing end and the internal switch. A horizontal plug is provided for closing a recess cut from the upper side of the first partition wall toward the bottom of the lower case. Therefore, the microphone can be easily assembled.
In addition, since the route for dust to enter from other than the side plug is completely eliminated, the dustproof effect is enhanced.

According to a third aspect of the present invention, in the microphone for a communication device according to the first or second aspect, a communication operation unit is provided in an upper case including an upper part of a call button driving room. For this reason, the communication function of the microphone for the communication device can be enhanced, and at the same time, no extra space is required on the opposite side to the call button due to the arrangement of the buttons and the like. Therefore, the size of the communication device microphone can be reduced.

According to a fourth aspect of the present invention, in the microphone for a communication device according to the second or third aspect, the second partition and the horizontal plug are formed as a dustproof packing. Therefore, the dustproof second partition and the horizontal plug can be integrally formed, and the manufacturing cost can be reduced.

According to a fifth aspect of the present invention, in the microphone for a communication device according to the fourth aspect, the dustproof packing has a planar shape, and a connecting portion connecting the second partition and the horizontal plug is provided with the dustproof packing. At a position that can be bent. For this reason, the second partition and the horizontal plug can be integrally molded into a planar shape, and the manufacturing cost can be further reduced, and the dustproof packing can be set by easily bending the connecting portion between the second partition and the horizontal plug. .

According to a sixth aspect of the present invention, in the microphone for a communication device according to the fifth aspect, when the dustproof packing is attached, the connecting portion and the horizontal plug are provided on the second partition where the second partition comes into contact with the horizontal plug. A groove is formed so that the curved portion can adhere to the second partition wall. For this reason, the bent connecting portion does not hinder the contact between the second partition and the horizontal plug, and the two can be brought into close contact with each other. Therefore, the dustproof effect can be enhanced.

According to a seventh aspect of the present invention, in the microphone for a communication device according to any one of the second to sixth aspects, the second side opposite to the contact portion where the second partition wall and the horizontal plug come into contact with each other. A plurality of projections are provided on the upper surface of the partition wall so that the second partition wall can be pressed downward when the upper case is placed over the lower case. For this reason, when the upper case is put on the lower case, the second partition is pushed downward, and the gap with the horizontal plug completely disappears. In addition, since it is pushed downward with a plurality of projections, it is unlikely to be pushed one-sidedly. Therefore, the adhesion between the second partition and the horizontal plug is further improved.

The invention according to claim 8 is the communication device microphone according to claim 7, wherein the microphone is located behind the projection.
A protruding second convex portion lower than the convex portion is provided.
For this reason, even if the side without the plurality of protrusions is lifted up by the leverage principle when the plurality of protrusions are pressed downward, the second
The protrusion stops inside the upper case. Therefore, there is no danger that the second partition will come off the first partition. Further, since the second convex portion is lower than the plurality of convex portions, there is no danger that the second convex portion comes into contact with the upper surface first and the side having the plurality of convex portions is lifted. For this reason, the adhesion between the second partition and the horizontal plug can be kept high.

According to a ninth aspect of the present invention, in the microphone for a communication device according to any one of the first to eighth aspects, the talk button rotates about an axis supported by the upper case and the lower case. Then, the internal switch is pressed, and a rib is provided on the inner peripheral surface of the hole of the second partition through which the shaft passes to make close contact with the shaft. Therefore, there is a low risk that dust and the like enter the circuit board on the dustproof chamber side through the hole through which the shaft passes.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

FIG. 1 is a communication device microphone (hereinafter simply referred to as a vehicle-mounted or portable communication device).
FIG. 3 is a plan view of a lower case 20 in which an upper case is separated from a “microphone” and a dustproof packing 50 that covers a part thereof. First, the lower case 20 shown in FIG. Microphone circuit board 3
The dustproof room 30 in which the press-talk switch 4 is installed and the non-dustproof room 40 in which the press-talk switch 3 is installed are separated by a dustproof wall 31 which is a first partition. Circuit board 34
Is installed in the dustproof room 30 provided with a tact switch 33 serving as an internal switch for communication.

The tact switch 33 and the leaf spring 4 mounted inside the press talk switch 3 are connected to the dustproof wall 31.
It is provided so as to face the rubber contact socket 31a, which is a concave portion of the above, with the rubber contact 56 as a horizontal plug fitted and tightly fitted. Dustproof packing 50
Is composed of an upper packing 51 serving as a second partition, a rubber contact 56, and a connecting portion 55 connecting these 51 and 56. Since the dustproof packing 50 has a planar shape, it can be manufactured at low cost. Rubber contact 5
6 is inserted into the rubber contact socket 31a in a state of fitting and close contact. As a result, dust does not enter the dustproof chamber 30 where the circuit board 34 is located.

At the center of the rubber contact 56, there is a rubber contact button 57 which is integrally formed in a cylindrical shape. When the press talk switch 3 is pressed, the leaf spring 4
Moves toward the dustproof room 30. Thereby, the leaf spring 4
Presses the rubber contact button 57.
As a result, the rubber contact button 57 presses the tact switch 33, and the tact switch 33 is turned on. The rubber contact button 57 is provided inside the rubber contact 56 via a thin wall. For this reason, when the rubber contact button 57 receives the pressure of the leaf spring 4,
It easily moves to the dust-proof room 30 and returns to the original state when the pressing of the leaf spring 4 is released.

The press-talk switch 3 provided in the non-dustproof chamber 40 limited to one side of the lower case 20 of the microphone includes a leaf spring 4 formed into a spring shape, a leaf spring holding portion 6, and a fixed shaft 5. And a key portion to be touched by the thumb. When the press-talk switch 3 is pressed from the outside, it rotates clockwise about the fixed shaft 5.
On the other hand, when the press-talk switch 3 is released, the elasticity of the leaf spring 4 causes the press-talk switch 3 to rotate in a direction to return to the original position. The leaf spring 4 flexes and moves in the high-stroke non-dustproof chamber 40 while contacting the rubber contact button 57. Therefore, a feeling of pressing the switch can be obtained.

The switch stopper 35 is provided to prevent the press-talk switch 3 from being pushed too much. On the other hand, the connector cable attachment port 22a is a dustproof socket into which a modular jack of the connector cable is inserted.

Next, the dustproof packing shown in FIG. 1B will be described.

The dustproof packing 50 is provided to isolate the dustproof room 30 from the non-dustproof room 40 provided in the lower case 20 of the microphone. The rubber contact 56 of the dustproof packing 50 is for preventing dust from entering the dustproof wall 31 in the lateral direction. In addition, the upper packing 51
This is to prevent dust from entering the upper case 10 side.

A press talk switch fixing hole 53 formed in the upper packing 51 is provided to allow a fixed shaft 5 provided in the press talk switch 3 to pass therethrough. If there is a gap between the fixed shaft 5 and the press-talk switch fixing hole 53 through which dust passes, dust enters there.
There is a risk that the dust-proof effect may be reduced. For this reason, a rib is provided around the inside of the press talk switch fixing hole 53 so as to be in close contact with the fixed shaft 5.

When the dust-proof packing 50 is set in the lower case 20, three projections 52 are provided side by side on the upper surface of the upper packing 51 above the portion where the upper packing 51 contacts the rubber contact 56. I have. Convex part 5
The back side of 2 is a contact portion with the rubber contact 56. If there is a gap here, the dustproof effect is reduced. For this reason, under the pressure from the upper cover 10, the adhesion between the upper packing 51 and the rubber contact 56 can be enhanced.
The projection 52 is provided. In addition, since the three convex portions 52 having substantially the same height are arranged slightly longer than the width of the rubber contact 56, the contact between the rubber contact 56 and the upper packing 51 does not become one-sided pressing, and the pressing is performed uniformly. Can be.

On the back side of the upper packing 51, a groove for narrowing the dustproof wall 31 is provided. The upper packing 51 is set by fitting this groove into the dustproof wall 31. When pressure is applied from above the three convex portions 52, there is a risk that the connector cable mounting opening 22a side will be lifted by the principle of leverage. For this reason, in order to minimize lifting of the upper packing 51, a second convex portion 53 is provided on the connector cable mounting port 22 a side of the upper packing 51.
However, when the second convex portion 53 receives the pressing of the upper case 10 in preference to the convex portion 52, the side having the convex portion 52 is lifted. Then, the upper packing 51 and the rubber contact 5
There is a risk that a gap may be formed between the first and the second. Therefore, the height of the second protrusion 53 is set lower than the height of the protrusion 52.

FIG. 2 is a bottom view of the dustproof packing 50, that is, a view of the dustproof packing 50 as viewed from inside the non-dustproof chamber 40. Third protrusions 58, 58 and fourth protrusions 59, 59 are provided in a portion where the upper packing 51 contacts the dustproof wall 31. These third convex portions 58, 58 and fourth convex portion 5
A groove for holding the dustproof wall 31 is formed by 9, 59.

FIG. 3 is a view of the dustproof packing 50 as viewed from the dustproof chamber 30 with the rubber contact 56 lifted up. Groove 51a provided on the side wall of upper packing 51
Is a groove for fitting the rubber contact 56 into the rubber contact socket 31a. Next, this will be specifically described.

FIG. 4 shows that the dustproof packing 50 is
It is a perspective view which shows the state attached to. FIG. 4 (A)
Is a state before the rubber contact 56 is fitted into the rubber contact socket 31a. (B) of FIG.
It is a figure showing the state where only rubber contact 56 was fitted in rubber contact socket 31a. Lower case 2
The top of the non-dustproof chamber 40 is covered with an upper packing 51, and the dustproof chamber 30 is closed with a rubber contact 56. When the upper packing 51 and the rubber contact 56 are set, the thin joint rubber 55 as a connecting portion connecting the two 51 and 56 is bent in a U-shape. In order to prevent the thickness of the bent joint rubber 55 from adversely affecting the adhesion between the upper packing 51 and the rubber contact 56, a groove 51 a is provided on a side wall of the upper packing 51, which is a contact portion between the upper packing 51 and the rubber contact 56. ing.

FIGS. 5A and 5B show the state in which the upper packing 51 and the rubber contacts 56 are set, and only the upper packing 51 and the rubber contacts 56 are used.
Dust-proof room 30 side and connector cable mounting port 2
It is the figure seen from 2a side. Arrow A in FIG.
As shown by the portion indicated by a circle, the contact portion between the rubber contact 56 and the joint rubber 55 fits into the groove 51a so that the upper packing 51 and the rubber contact 56 can be in close contact with each other. In particular, since the joint rubber 55 is thinner than the thickness of the upper packing 51 and the rubber contact 56,
There is no danger of working in the direction in which the two 51, 55 are separated from each other, and they are easily bent.

FIG. 6 is a sectional view of the non-dustproof chamber 40 of the microphone as viewed from the connector cable mounting port 22a side.
As shown in this figure, the non-dustproof chamber 40 is provided only in the lower case 20, so that the upper case 10 and the right side of the lower case 20 in FIG.
For this reason, even if it is small, the entire surface of the upper case 10 can be effectively used. That is, the circuit board 14 and the keypad 80 such as a numeric keypad can be provided above the non-dustproof chamber 40.

[0036]

According to the present invention, it is possible to provide a small and low-cost microphone for communication equipment which is excellent in dustproofness while ensuring a high stroke of the press talk switch.

[Brief description of the drawings]

FIG. 1 is a plan view of a lower case (A) and a dustproof packing (B) of a communication device microphone according to an embodiment of the present invention.

FIG. 2 is a bottom view of the dustproof packing shown in FIG.

FIG. 3 is a view of the dustproof packing shown in FIG. 1B as viewed from the dustproof chamber side.

FIG. 4 is a perspective view showing a state in which the dustproof packing shown in FIG. 1B is set in a lower case shown in FIG. 1A, wherein FIG. 4A shows a state before setting, and FIG. 4B shows a rubber contact. It is a figure which shows the state which set.

FIG. 5 (B) in the lower case shown in FIG. 1 (A);
FIG. 5 is a view showing the upper packing and the rubber contacts in a state where the upper packing and the rubber contacts shown in FIG. (A) is a diagram viewed from the dustproof room side, and (B) is a diagram viewed from the connector cable mounting port side.

FIG. 6 is a cross-sectional view of a microphone for a communication device according to an embodiment of the present invention on the non-dustproof room side.

FIG. 7 is a diagram showing a conventional portable communication device (wireless device).

FIG. 8 is a perspective view of a conventional communication device microphone.

9 is a perspective view when the microphone for communication device of FIG. 8 is separated into an upper case and a lower case.

10 is a cross-sectional view of the microphone for communication device of FIG. 8 on the side of the non-dustproof room.

[Explanation of symbols]

 3 Press Talk Switch (Talk Button) 3a Press Talk Switch Window (Opening) 4a Pressing End 5 Fixed Shaft (Shaft) 10 Upper Case 14, 34 Circuit Board 20 Lower Case 31 Dustproof Wall (First Partition) 31a Rubber Contact Socket for tactile switch 32 Window for tact switch (recess) 33 Tact switch (internal switch) 40 Non-dustproof room (call button driving room) 50 Dustproof packing 51 Upper packing (second partition) 51a Groove 52 Convex part 53 Second convex part 54 Fixation Shaft hole (hole) 55 Joint rubber (connecting part) 56 Rubber contact (lateral plug) 80 Keypad (operation part)

Claims (9)

[Claims] 1. A microphone for a communication device in which an upper case and a lower case are joined to each other and an internal circuit board is stored therein, wherein the microphone is provided in the lower case through an opening provided on a lateral side of the lower case. A call button in which a pressing end portion capable of pressing an internal switch to be pressed during a call is inserted and disposed, a first partition provided between the pressing end portion and the internal switch, A call button drive chamber surrounded by a second partition wall that covers the first partition wall to the opening, wherein dust is prevented in an inner direction from the first partition wall and in a direction of the upper case from the second partition wall. Communication microphone. 2. The second partition is detachable from the lower case, and is located on a line connecting the pressing end and the internal switch, and extends from an upper side of the first partition toward a bottom of the lower case. 2. The microphone for a communication device according to claim 1, further comprising a horizontal plug for closing the cut-out recess. 3. The microphone for a communication device according to claim 1, wherein an operation unit for communication is provided in the upper case including an upper part of the call button driving room. 4. The microphone for a communication device according to claim 2, wherein the second partition and the horizontal stopper are integrally formed as a dustproof packing. 5. The dust-proof packing has a planar shape, and a connecting portion connecting the second partition and the horizontal plug is configured to be bendable with the dust-proof packing attached. The microphone for a communication device according to the above. 6. A curved portion of the connecting portion and the horizontal plug is in close contact with the second partition where the second partition comes into contact with the horizontal plug in a state where the dust-proof packing is attached. 6. The microphone for a communication device according to claim 5, wherein a groove is provided to enable the communication device. 7. When the upper case is placed on the lower case on the upper surface of the second partition opposite to the contact portion where the second partition contacts the horizontal plug, the second partition is lowered. 7. The microphone for a communication device according to claim 2, wherein a plurality of convex portions that can be pressed are provided on the microphone. 8. The microphone for a communication device according to claim 7, wherein a protruding second convex portion lower than the convex portion is provided behind the convex portion. 9. The communication button according to claim 1, wherein the talk button is configured to rotate around a shaft supported by the upper case and the lower case to press the internal switch. The microphone for a communication device according to any one of claims 1 to 8, wherein the inner peripheral surface has a rib that is in close contact with the shaft.