JPH1065775A - Microphone holder in portable telephone equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate an obstacle to speech generated by the fact that the vibration of a speaker itself caused by voice from the opposite party is transmitted to a microphone within a microphone holder to generate howling at the opposite side and that the microphone picks up the vibration of a hand through a casing when user handles a portable telephone equipment. SOLUTION: The material of projecting parts 21a, 21b, 23c, 24d and 24e respectively provided at places corresponding to the front surface panel 21, the side surface panel 23 and the back surface panel 24 of the microphone unit 3 at the inner wall of the microphone holder 20 is rubber, etc. At the time of housing the unit 3 in the holder 20, the unit 3 is held by the projecting parts to transit the user's voice to the unit 3 from a voice opening 22. The vibration of a speaker caused by the voice of the opposite party in the middle of speaking is transmitted to the holder 20 through a front surface casing and a panel and furthermore transmitted to the unit 3 from the projecting parts. However, an area in contact with the projecting parts is so fine that a vibration conductivity is very small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microphone holder in a portable telephone, and more particularly to a portable telephone in which the amount of vibration transmitted from a speaker or vibration from a hand when a user talks is transmitted to the microphone. The present invention relates to a microphone holder in a mobile phone.

[0002]

2. Description of the Related Art FIGS. 3A and 3B are side views including partial cross sections before and after assembly of a general portable telephone.

Referring to FIG. 3, a method of assembling a portable telephone will be described. A speaker 2 and a microphone holder 40 containing a microphone unit 3 are arranged at predetermined positions of a front casing 1, and a speaker 2 and a microphone holder 40 are arranged. The panel 5 is mounted on the rear surface of the front casing 1, and both ends of the panel 5 are screwed to the front casing 1 with screws 6, and the rear casing 7 is assembled into the front casing 1.

Accordingly, the close contact of the microphone holder 40 with the casing is performed by the screw tightening pressure when the panel 5 is screwed to the front casing 1.

FIG. 4 is a view showing an example of the conventional microphone holder shown in FIG. 3, in which (a), (b), (c) and (d).
FIG. 3 is a plan view of the microphone holder as viewed from the front, a side cross-sectional view, a plan view as viewed from the back, and a side view including a partial cross-section of the microphone holder with the microphone unit housed therein.

Referring to FIG. 4, the microphone holder of this conventional example has a hollow cylindrical shape, has a sound opening 42 in the center of the front plate 41, and is connected to the front plate 41 by a side plate 43. At the center of 44, there is provided a lead wire drawing hole 45 for drawing out the lead wire 31 when the microphone unit 3 is stored.

The front plate 41 can be detached from the side plate 43. In this detached state, the lead wire 31 of the microphone unit 3 is inserted into the lead wire outlet hole 4.
5, the microphone unit 3 is housed in the microphone holder 40 and the front plate 41 is attached.
In the state shown in (d), the microphone unit 3 is held in surface contact with the inner walls of the front plate 41, the side plate 43, and the back plate 44, and the voice of the user is input to the microphone from the sound opening 42.

[0008]

In general, portable telephones tend to be miniaturized, and the positions of the speakers and the microphones are inevitably approaching. Therefore, it is necessary to closely contact the front casing to prevent acoustic coupling between the speakers and the microphones. There is. However, in order to achieve this close contact, in a conventional mobile phone, pressure is applied to the microphone by sandwiching the microphone with the front casing and the rear panel, so that vibration of the speaker is easily transmitted to the microphone through the front casing and the rear panel. Howling occurs.

In the conventional microphone holder, there is a problem that vibration of the speaker itself due to voice from the other party is transmitted to the microphone unit in the microphone holder, and howling occurs on the other party side.

Further, since a large pressure is generated between the microphone and the casing, the vibration applied to the casing of the mobile phone is easily transmitted to the microphone, and the vibration of the hand when the user holds the mobile phone and talks through the microphone. However, there was a problem that the call was hindered and the call was hindered.

An object of the present invention is to minimize the size of the contact portion between the inner wall of the microphone holder and the microphone unit so that the microphone unit does not pick up vibration during howling or user handling. It is to provide a microphone holder in a telephone.

[0012]

According to the present invention, in a portable telephone in which a speaker and a microphone unit are arranged on the same surface of a casing, a microphone holder for holding the microphone has a small area almost in point contact with the microphone unit. And a microphone holder in the mobile phone characterized by having the contact structure described above.

[0013] Further, the contact structure has a structure in which convex portions are provided on the inner wall of the microphone holder at positions corresponding to the front, side, and back of the microphone unit, respectively. Can be

Further, a material of at least each of the projections of the microphone holder is a cushioning elastic member, thereby obtaining a microphone holder for a portable telephone.

[0015]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a view showing an embodiment of the microphone holder of the present invention in FIG. 3, wherein (a), (b), (c) and (d) are a plan view and a side view from the front of the microphone holder. FIG. 3 is a cross-sectional view, a plan view as viewed from the back, and a side view including a partial cross-section in a state where a microphone unit is housed in a microphone holder.

The method of assembling the portable telephone according to the present embodiment is the same as the method of the conventional example described with reference to FIG. 3, and the conventional microphone holder 40 is replaced with the microphone holder 20 of the present embodiment.
Should be read as

That is, the speaker 2 and the microphone holder 20 accommodating the microphone unit 3 are arranged at predetermined positions of the front casing 1, and the panel 5 is placed on the back of the speaker 2 and the microphone holder 20, and both ends of the panel 5 are placed. Is screwed to the front casing 1 with the screws 6, and the rear casing 7 is assembled into the front casing 1 for assembly.

Referring to FIG. 1, a microphone holder 20 according to the present embodiment has a hollow cylindrical shape, has a sound opening 22 at the center of a front plate 21, and is connected to a front plate 21 by a side plate 23. At the center of the face plate 24, a lead wire outlet hole 25 for leading the lead wire 31 when the microphone unit 3 is stored is provided.

The microphone holder 20 includes a front plate 21 and a side plate 23 of the microphone unit 3 housed therein.
And the projections 21a, 21
1b; 23c, 24d, and 24e are provided, and the material of these protrusions is a cushioning elastic member such as rubber, for example, and can absorb vibration transmitted from the outside to the microphone holder 20.

The front plate 21, the side plate 23 and the back plate 24 may be made of the same material as the projections, and the number and arrangement of the projections may be arbitrarily determined according to the size of the microphone unit 3. .

Therefore, in the present embodiment, when the microphone unit 3 is stored in the microphone holder 20, FIG.
As shown in (d), the microphone unit 3 is held by a plurality of projections on the inner wall of the microphone holder 20, and the voice of the user is transmitted from the sound opening 22 to the microphone unit 3.

The other party's voice during a call causes the speaker 2 itself to vibrate, and this vibration is transmitted to the microphone holder 20 through the front casing 1 and the panel 5, and from the front casing 1 to the projections 21 a and 21 b of the front plate 21. The vibration transmitted from the panel 5 while being transmitted to the microphone unit 3 is transmitted to the projection 24 of the back plate 24 of the microphone holder 20.
d and 24e are transmitted to the microphone unit 3.

Further, the vibration from the hand of the user during the call is transmitted to the microphone holder 20 through the front casing 1, and the vibration is transmitted to the microphone unit 3 from the projections 21 a and 21 b of the microphone holder 20. .

However, the point of contact between the inner wall of the microphone holder 20 and the microphone unit 3 is determined by the protrusions 21a and 21a.
b, 23c, 24d, and 24e, which are almost point contacts, and the total contact area is extremely small.

FIG. 2 is a diagram showing the relationship between the contact area ratio between the microphone holder and the microphone unit and the vibration conduction value.

Referring to FIG. 2, it can be seen that the smaller the contact area ratio, the smaller the vibration conduction value. Therefore, in this embodiment, since the contact area ratio is minimized,
The amount of vibration transmitted from the microphone holder 20 to the microphone unit 3 is greatly reduced as compared with the conventional example (surface contact).

In the present embodiment, since the material of the convex portion and the microphone holder is a cushioning elastic member as described above,
Any vibrations during the call are buffered to reduce noise,
A comfortable call is realized.

[0029]

As described above, according to the present invention, in a portable telephone in which a speaker and a microphone unit are arranged on the same surface of a casing, a microphone holder for holding a microphone has a contact structure having a small area almost in point contact with the microphone unit. In addition, the contact structure has a structure in which convex portions are provided at locations corresponding to the front, side, and rear surfaces of the microphone unit on the inner wall of the microphone holder, respectively. Since the material of the section is a cushioning elastic member, the amount of vibration of the speaker and vibration from the hand caused by the handling of the user transmitted to the microphone is remarkably reduced.

[Brief description of the drawings]

FIG. 1 is a view showing one embodiment of a microphone holder of the present invention in FIG. 3, wherein (a), (b), (c) and (d) are a plan view and a side sectional view as viewed from the front of the microphone holder. FIG. 3 is a plan view as viewed from the back, and a side view including a partial cross section in a state where the microphone unit is housed in the microphone holder.

FIG. 2 is a diagram showing a relationship between a contact area ratio between a microphone holder and a microphone unit and a vibration transmission value.

FIGS. 3A and 3B are side views including a partial cross section before and after assembly of a general mobile phone.

FIG. 4 is a view showing an example of the conventional microphone holder in FIG. 3, wherein (a), (b), (c) and (d) are a plan view, a side sectional view, and a rear view of the microphone holder viewed from the front. It is the side view including the seen top view and the partial cross section in the state where the microphone unit was stored in the microphone holder.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front casing 2 speaker 3 microphone unit 5 panel 6 screw 7 rear casing 20, 40 microphone holder 21, 41 front plate 21a, 21b, 23c, 24d, 24e convex portion 22, 42 sound port 23, 43 side plate 24, 44 back Face plate 25, 45 Lead wire outlet hole 31 Lead wire

Claims (3)

[Claims] 1. A portable telephone in which a speaker and a microphone unit are arranged on the same surface of a casing, wherein a microphone holder for holding the microphone has a contact structure having a small area that makes point contact with the microphone unit. Microphone holder for mobile phones. 2. The mobile phone according to claim 1, wherein the contact structure has a structure in which convex portions are provided at positions corresponding to the front, side, and back of the microphone unit on the inner wall of the microphone holder. Microphone holder. 3. The microphone holder according to claim 2, wherein a material of at least each of the projections of the microphone holder is a cushioning elastic member.