JPH098888A - Portable telephone set - Google Patents

Abstract

PURPOSE: To obtain a portable telephone system capable of speaking without noise mixed to the speech of a user even at a place where many noises are generated in the periphery. CONSTITUTION: A mouthpiece 2 is formed at the front/lower part of a from external case 1 and a noise cancel hole 11 is formed at the bottom part of the case 1. The distance between the mouthpiece 2 and the noise cancel hole 11 is set lest user's speech emitted to the mouthpiece 2 should spread to the noise cancel hole 11. Then user's speech is transmitted by inputting it in one direction of a both-directional microphone 10 and noise is inputted to one direction and the other direction of the both-directional microphone 10 from the mouthpiece 2 and the noise cancel hole 11 to be cancelled in the both-directional microphone 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated mobile phone device such as a simplified mobile phone device.

[0002]

2. Description of the Related Art The types of structures of portable telephone devices can be roughly divided into two types: an integral type and a foldable type. The integrated type has a substantially rectangular single case structure in which a receiver, a microphone, a battery, and the like are housed in the same case. The foldable type has a plurality of case structures and can be folded.

FIG. 9 is a side sectional view of a conventional integrated type portable telephone device. In the figure, 1 is a front outer case,
The lower part has a mouthpiece 2 for taking in sound from the outside, and the upper part has an earpiece 4 for outputting sound to the outside. Reference numeral 5 is a rear outer case, 6 is a microphone installed inside the front outer case 1 in the vicinity of the mouthpiece 2, 7 is a rubber for a microphone to which the microphone 6 is fixed and mounted, and 8 is mounted outside the rear outer case 5. Battery, 9 is a front outer case 1 near the earpiece 4
It is a receiver installed inside.

Next, the operation will be described. First, with respect to speech transmission, the user makes a voice toward the mouthpiece 2. The voice is input to the microphone 6 through the mouthpiece 2, and after being processed by a circuit section (not shown) provided inside the case,
It is transmitted to the other party as a voice signal. For listening,
After receiving a voice signal from the other party and performing signal processing by a circuit section (not shown) provided inside the case, voice is output from the receiver 9 to the outside through the earpiece 4, and this is output. The user hears the voice.

Next, when the portable telephone device is used in a place with a lot of noise around, noise is input to the microphone 6,
A voice signal mixed with voice and having noise during transmission and reception is transmitted and received. For this reason, it is difficult to hear the voice and it becomes difficult to make a call. Therefore, it is conceivable to use, as the microphone 6, a bidirectional microphone (differential microphone) that has an effect of canceling ambient noise.

The bidirectional microphone cancels sounds input from both directions of the mouthpiece 2 and a noise canceling hole (not shown) provided separately in the case, and cancels the sounds inputted from only one direction of the mouthpiece 2. Is processed as a signal as it is. Therefore, in order to use the bidirectional microphone in the mobile phone device, it is necessary to provide a noise canceling hole in the case near the microphone 6 in addition to the mouthpiece 2.

As a conventional technique for canceling the noise around the portable telephone device, Japanese Patent Laid-Open No. 3-234414 is known.
There is one disclosed in Japanese Patent No. Details of the present invention will be given to the publication, but the main point is to use two microphones,
One microphone is placed on the lower front surface of the housing, and the other microphone is placed so that the direction of its directivity is almost opposite to the direction of the directivity of one microphone. It is arranged so that it intersects at the part.

Further, as a conventional technique using a directional microphone for a portable telephone device, there is a technique disclosed in Japanese Patent Laid-Open No. 4-91542.
The N characteristic is improved.

[0009]

Since the conventional portable telephone device is constructed as described above, when it is used in a noisy place in the surroundings, a bidirectional microphone should be used in the mouthpiece 2. In addition, even if an attempt is made to provide a noise canceling hole in the case near the microphone 6, for example, in the rear surface of the case, the battery 8 is attached and it is difficult to provide the hole. However, there is a problem in that an effective noise canceling effect cannot be obtained even if a bidirectional microphone is used without providing a noise canceling hole.

The present invention has been made to solve the above problems, and an object of the present invention is to obtain a portable telephone device which can make a call even in a place with a lot of noise in the vicinity without the noise being mixed with the voice of the user. And

[0011]

A portable telephone device according to the present invention includes a bidirectional microphone installed inside an end in the longitudinal direction of a case, and a front surface portion of the case close to the bidirectional microphone, It is equipped with a mouthpiece for inputting one direction of the bidirectional microphone, and a noise canceling hole formed on the bottom surface of the case close to the bidirectional microphone to input voice to the other direction of the bidirectional microphone. .

Further, the present invention is provided with a protrusion formed on the outer surface of the case between the mouthpiece and the noise canceling hole.

Further, a bidirectional microphone and a mouthpiece formed on the front surface of the case close to the bidirectional microphone, for inputting voice in one direction of the bidirectional microphone, and a bottom surface of the case close to the bidirectional microphone. And a noise canceling hole that is formed on the part to allow voice to be input to the other direction of the bidirectional microphone,
An elastic body that houses the bidirectional microphone and has a first opening and a second opening that communicate between the mouthpiece, the noise canceling hole and one direction of the bidirectional microphone, and the other direction, and a first outer surface of the elastic body. The first rib portion formed around the first opening and the second rib portion formed around the second opening on the outer surface of the elastic body are provided, and the elastic body is formed inside the end in the longitudinal direction of the case. The first rib portion is pressed and brought into close contact with the inner surface of the case around the mouthpiece, and the second rib portion is pressed and brought into close contact with the inner surface of the case around the noise canceling hole.

A waterproof type bidirectional microphone is used as the bidirectional microphone.

[0015]

In the portable telephone device according to the present invention, the mouthpiece is formed on the front surface of the case close to the bidirectional microphone, and the noise canceling hole is formed on the bottom surface of the case close to the bidirectional microphone. When talking, voice is input from the mouthpiece in one direction of the bidirectional microphone and transmitted to the other party, and ambient noise is input in one direction and the other direction of the bidirectional microphone from the mouthpiece and noise cancellation hole, respectively, and cancels each other. I will meet you.

Further, by forming a protrusion on the outer surface of the case between the mouthpiece and the noise canceling hole, the voice input from the vicinity of the mouthpiece in one direction of the bidirectional microphone wraps around the noise canceling hole. Shut off.

Further, the first opening on the outer surface of the elastic body, the first rib portion formed around the first opening, and the second rib portion are pressed against the inner surface of the case around the mouthpiece and the noise canceling hole. The close contact prevents the voice input from the mouthpiece in one direction from the mouthpiece during transmission from leaking to the surroundings from the first opening, and also inputs from the noise canceling hole to the other direction of the bidirectional microphone. The generated sound is prevented from leaking to the surroundings from the second opening.

Further, by using a waterproof bidirectional microphone as the bidirectional microphone, it is possible to prevent water from entering the case through the first opening and the second opening without changing the structure, and to have a waterproof function. Can be made.

[0019]

【Example】

Embodiment 1 FIG. First Embodiment FIG. 1 is a side sectional view of a mobile phone device showing a first embodiment of the present invention, and FIG. 2 is an exploded view of the mobile phone device. In the figure, the same reference numerals are given to the same or corresponding parts as in the conventional example, and the description is omitted. 10 is a bidirectional microphone, 1
Reference numeral 1 denotes a noise canceling hole formed on the bottom surface of the front outer case 1, which has a positional relationship of 90 degrees or more with the mouthpiece 2 and has a predetermined distance at which a voice emitted to the mouthpiece 2 does not go around. Have.

Reference numeral 12 denotes a microphone rubber for accommodating the bidirectional microphone 10, and an opening 13 communicating with the mouthpiece 2 for inputting voice from the mouthpiece 2 to one direction of the bidirectional microphone 10.
And an opening 14 communicating with the noise canceling hole 11 for inputting sound from the noise canceling hole 11 to the other direction of the bidirectional microphone 10. The opening 13 corresponds to the first opening, the opening 14 corresponds to the second opening, and the microphone rubber 12 corresponds to the elastic body.

Next, the operation will be described. With regard to speech transmission, first, the user makes a voice toward the mouthpiece 2. The voice is transmitted through the mouthpiece 2 and the opening 13 to the bidirectional microphone 1
0 is input in one direction. Here, since the noise canceling hole 11 has a positional relationship of 90 degrees with the mouthpiece 2 and has a predetermined distance so that the voice emitted to the mouthpiece 2 does not wrap around, the voice of the user is input. Never. After that, the voice input from the mouthpiece 2 is subjected to signal processing by a circuit section (not shown) provided inside the case, and then transmitted as a voice signal to the other party. Note that the reception is the same as that of the conventional example, and thus the description thereof is omitted.

Next, when the portable telephone device is used in a place where there is a lot of noise in the vicinity, noise reaches the portable telephone device because the sound source such as noise is located farther than the user of the portable telephone device. Sometimes it is expansive. For this reason, noise is input in one direction of the bidirectional microphone 10 through the mouthpiece 2 and the opening 13, and the bidirectional microphone 1 through the noise canceling hole 11 and the opening 14.
It will be input in the other direction of 0. Therefore, noise is canceled and canceled in the bidirectional microphone 10, and is not taken in.

In the first embodiment described above, the positional relationship between the noise canceling hole 11 and the mouthpiece 2 is such that the voice emitted to the mouthpiece 2 has a predetermined distance so as not to go around. 2 may be formed between the noise canceling hole 11 and the noise canceling hole 11 to prevent the sound from wrapping around, which will be described in detail in the second embodiment.

Embodiment 2 FIG. Second Embodiment FIG. 3 is a side sectional view of a mobile phone device showing a second embodiment of the present invention. In the figure, the same or corresponding parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 15 is a protrusion 15 formed on the outer surface of the front outer case 1 between the mouthpiece 2 and the noise canceling hole 11.

Next, the operation will be described. When talking,
The user makes a voice toward the mouthpiece 2. The voice is input in one direction of the bidirectional microphone 10 through the mouthpiece 2 and the opening 13. Here, of the voice of the user, the voice that tries to sneak into the noise canceling hole 11 is blocked by the protrusion 15 as a barrier. This prevents the voice of the user from flowing into the noise canceling hole 11 and being canceled.

Example 3. 4 is a perspective view of a rubber for a microphone of a mobile phone device according to a third embodiment, FIG. 5 is a perspective view of a rubber for a microphone viewed from the direction A of FIG. 3, and FIG. 6 is a view of a rubber viewed from the direction B of FIG. FIG. 7 is a side view of the rubber, FIG. 7 is a side view of the rubber for the microphone viewed from the direction C in FIG. 3, and FIG. 8 is a partial cross-sectional view of the mobile phone device when the rubber for the microphone is installed.

In the figure, the same or corresponding parts as those of the first embodiment are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 16 is a rib portion formed around the opening 13 of the microphone rubber 12, and 17 is a rib portion formed around the opening 14 of the microphone rubber 12, and at least the noise canceling hole 11 and the opening 14 are provided.
In order to prevent sound leakage from the close contact portion of the microphone, it is formed over the side surface of the microphone rubber 12. The rib portion 16
Corresponds to the first rib portion, and the rib portion 17 corresponds to the second rib portion, respectively.

Next, the operation will be described. When the microphone rubber 12 accommodating the bidirectional microphone 10 is installed in the case, the rib portion 16 is arranged so as to face the inner surface of the case around the mouthpiece 2, and the rib portion 17 is provided in the noise canceling hole 11. The rubber 12 for a microphone is arranged so as to face the inner surface of the case near the noise canceling hole 11 so as to block the sound leakage from the. Then, the front outer case 1 and the rear outer case 5 are fitted together. At this time, the rib portion 16 is pressed against the inner surface of the front outer case 1 around the mouthpiece 2 to be slightly deformed and brought into close contact. This prevents the voice input from the mouthpiece 2 from leaking from the close contact portion between the mouthpiece 2 and the opening 13 until the voice is input in one direction of the bidirectional microphone 10.

Further, the rib portion 17 is pressed against the inner surface of the front outer case 1 so that the sound from the noise canceling hole 11 does not leak to the inner surface of the case, and is slightly deformed and brought into close contact. As a result, the sound input from the noise canceling hole 11 can be prevented from leaking from the close contact portion between the noise canceling hole 11 and the opening 14 until the sound is input to the other direction of the bidirectional microphone 10. As described above, sound leakage of the voice input through the mouthpiece 2 and the noise canceling hole 11 is prevented, so that the voice of the user is reliably input in one direction of the bidirectional microphone 10 and ambient noise is also generated. Definitely bidirectional microphone 10
Input in one direction and the other direction.

Example 4. Although the above-described third embodiment shows the one that prevents sound leakage, a waterproof type is used for the bidirectional microphone, and the sound leakage prevention function of the rib portions 16 and 17 is closely adjusted to a waterproof level. By improving the property, the microphone part of the mobile phone device can have a waterproof function. Since the structure of this embodiment is the same as that of the third embodiment, detailed description thereof will be omitted, but the water input from the mouthpiece 2 by the rib portion 16 leaks from the close contact portion between the mouthpiece 2 and the opening 13. The rib 17 prevents the water input from the noise canceling hole 11 from leaking from the close contact portion between the noise canceling hole 11 and the opening 14.

[0031]

As described above, according to the present invention, at the time of transmission, the voice is input from the mouthpiece in one direction of the bidirectional microphone and is transmitted to the other party, and the ambient noise is the mouthpiece and the noise canceling hole. Since the bidirectional microphones are input in one direction and the other direction respectively and are configured to cancel each other out, it is possible to transmit the user's voice without noise even when using in a place with a lot of noise in the surroundings, There is an effect that a convenient mobile phone device can be obtained.

Further, the projection formed on the outer surface of the case between the mouthpiece and the noise canceling hole blocks the sound input in one direction from the vicinity of the mouthpiece into the noise canceling hole. With this configuration, the user's voice can be prevented from sneaking into the noise canceling hole, and an easy-to-use mobile phone device can be obtained that can be transmitted without being canceled.

Further, it is possible to prevent a voice input from the mouthpiece in one direction from the mouthpiece at the time of voice transmission from leaking to the surroundings from the first opening, and to input the voice to the other direction from the noise cancel hole. Since it is configured such that the generated sound is prevented from leaking to the surroundings from the second opening, the sound leaked to the bidirectional microphone is prevented, and the sound of the user is reliably transmitted in one direction of the bidirectional microphone 10. Enter and
Ambient noise can also be reliably input to one direction and the other direction of the bidirectional microphone, and the effect of the bidirectional microphone can be fully exerted.

Further, by using the waterproof bidirectional microphone as the bidirectional microphone, it is possible to easily obtain a convenient mobile telephone device having a waterproof function in the microphone portion without changing the structure. .

[Brief description of drawings]

FIG. 1 is a side sectional view of a mobile phone device showing a first embodiment of the present invention.

FIG. 2 is an exploded view of the mobile phone device according to the first embodiment of the present invention.

FIG. 3 is a side sectional view of a mobile phone device according to a second embodiment of the present invention.

FIG. 4 is a perspective view of rubber for a microphone of a mobile phone according to a third embodiment of the present invention.

FIG. 5 is a perspective view of rubber for a microphone of a mobile phone according to a third embodiment of the present invention.

FIG. 6 is a side view of the rubber for a microphone of the mobile phone device according to the third embodiment of the present invention.

FIG. 7 is a side view of rubber for a microphone of a mobile phone device according to a third embodiment of the present invention.

FIG. 8 is a partial cross-sectional view of the mobile phone device when the rubber for a microphone according to the third embodiment of the present invention is installed.

FIG. 9 is a side sectional view of a conventional integrated mobile phone device.

[Explanation of symbols]

1 front external case, 2 mouthpiece, 5 rear external case, 10 bidirectional microphone, 11 noise canceling hole, 12 microphone rubber, 13 opening, 14 opening, 1
5 protrusions, 16 ribs, 17 ribs

Claims (4)

[Claims] 1. An integrated mobile phone device comprising a substantially rectangular case, wherein a bidirectional microphone installed inside a longitudinal end of the case and a front surface portion of the case proximate to the bidirectional microphone. A noise canceller which is formed on the bottom of the case close to the bidirectional microphone and which inputs voice into one direction of the bidirectional microphone. A mobile phone device having a hole. 2. The mobile phone device according to claim 1, further comprising a protrusion formed on the outer surface of the case between the mouthpiece and the noise canceling hole. 3. An integrated mobile phone device comprising a substantially rectangular case, wherein a unidirectional microphone and a unidirectional microphone which is formed on a front surface portion of the case adjacent to the bidirectional microphone. A mouthpiece to be input to, a noise canceling hole formed on the bottom surface of the case close to the bidirectional microphone to input voice to the other direction of the bidirectional microphone, the bidirectional microphone is stored, and A mouthpiece, an elastic body having a first opening and a second opening that communicate between the noise canceling hole and one direction of the bidirectional microphone and the other direction, and the first opening of the outer surface of the elastic body. A first rib portion formed on the periphery and a second rib portion formed on the outer surface of the elastic body around the second opening are provided, and the elastic body is provided inside the longitudinal end of the case. When installing A mobile phone characterized in that the first rib portion is pressed and brought into close contact with the inner surface of the case around the mouthpiece, and the second rib portion is pressed and brought into close contact with the inner surface of the case around the noise canceling hole. apparatus. 4. The mobile phone device according to claim 3, wherein a waterproof type bidirectional microphone is used as the bidirectional microphone.