JPH1051534A - Free hand speech device for telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable speaking with completely free hands by providing a means for amplifying the received voice signal of a telephone set and loudly speaking through a speaker and providing a means for receiving the voice of a speaking person and controlling its transmission. SOLUTION: The received voice signal of a telephone set 2 is amplified by an amplifying means 2, and the amplified received voice signal is spoken with loudness by a speaker 4. The voice of the speaking person to the telephone set 2 is received by a microphone, and the transmission of the received voice signal from the microphone 6 as a transmission voice signal is inhibited by an inhibiting means 7, based on a detecting signal from a detecting means 5 for detecting the existence of the received voice signal at the telephone set 2. Based on a detecting signal from a detecting means 8 for detecting the absence of the received voice signal at the telephone set 2, the transmission of the signal amplified by the amplifying means 3 to the speaker 4 as a loud speaking signal is inhibited by an inhibiting means 9. Thus, speaking is enabled with completely free hands and further, howling during speaking can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freehand communication device for a telephone which enables a telephone to be completely freehand without holding the handset or the portable telephone itself.

[0002]

When a telephone call is made with a telephone, it is usually necessary to hold the handset by hand.
This becomes difficult, for example, when both hands are blocked.
In addition, it is extremely dangerous to take a mobile phone by calling while driving a car.

[0003] Therefore, in order to enable a completely freehand call without having to hold the handset or mobile phone of the telephone with a hand, when a speaker and a microphone for loudspeaking the received voice signal of the telephone are provided, a call from the speaker is required. The loud voice of the other party is received by the microphone arranged near the speaker, and the voice of the other party is transmitted again to the other party, so that the other party can hear his or her conversation with a slight delay. This makes it extremely difficult to talk, and if the other party also loudspeaks the received voice using the same speaker, howling may occur during the call, making the call impossible. Such inconveniences can be significant when the speaker is driven at a high volume due to high ambient noise.

[0004] In addition, when amplifying a received voice signal and loudspeaking from a speaker, noise (white noise) from the speaker becomes extremely annoying when there is no voice from the other party.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and an object of the present invention is to enable a completely freehand communication, and to solve the above-mentioned disadvantages, thereby preventing howling during a communication. It is another object of the present invention to provide a freehand communication device for a telephone which enables a good call.

Another object of the present invention is to provide a freehand communication device for a telephone set which can suppress noise from a speaker when there is no voice of the other party and can make a good call. It is in.

[0007]

According to the present invention, there is provided an amplifying means for amplifying a received voice signal of a telephone, a speaker for amplifying the received voice signal amplified by the amplifying means, and a receiving voice of the telephone. Detecting means for detecting the presence of a signal, a microphone for receiving a voice of a speaker to the telephone, and prohibiting transmission of a sound signal received from the microphone as a transmission sound signal based on the detection signal from the detecting means. This is achieved by a freehand communication device for a telephone having a prohibition means.

The telephone applicable to the present invention may be a wired telephone having a telephone body and a handset, or may be a wireless telephone such as a mobile telephone or a mobile telephone. The freehand communication device of the present invention may be built in the telephone or provided separately from the telephone. When provided separately from a mobile phone, a mobile phone, or the like, a clip or the like may be provided on the main body case so as to be detachably fixed to an automobile sun visor or the like. As the microphone, the microphone of the telephone itself may be used, but when another microphone is used, the microphone is attached to the tip of the flexible arm attached to the main body case so that the speaker's voice can be surely heard. You may enable it to receive a sound.

A switch means such as a transistor or a reed relay is provided in the prohibiting means, and the switch means is operated to transmit a sound reception sound signal from the microphone as a transmission sound signal. Prohibiting means may be configured to prohibit by grounding, disconnecting the sound receiving audio signal line, or inserting an attenuator (attenuator) into the sound receiving audio signal line. Alternatively or together with this, another amplifying means for amplifying the sound reception sound signal of the microphone is provided in the freehand communication device of the present invention, and the amplifying function of the other amplifying means is stopped, and the The prohibiting means may be configured to prohibit the transmission of the received sound signal as a transmission sound signal. As a method of stopping the amplification function of the amplification unit, a method of stopping the supply of power to the amplification unit can be mentioned as a preferable example.

[0010] The freehand communication device of the present invention comprises another detecting means for detecting the absence of a voice signal received by the telephone, and a loudspeaker signal of the amplified signal of the amplifying means based on the detection signal from the other detecting means. Other prohibiting means for prohibiting the transmission to the speaker as above may be further provided.

The other prohibiting means may be constituted in the same manner as the above-mentioned prohibiting means. The prohibiting means includes switch means, and operates the switch means to transmit the amplified signal of the amplifying means to the speaker as a sound signal. Even if it is configured to prohibit the transmission, or alternatively or together with this, the amplification function of the amplification means is stopped, and the transmission of the amplified signal of the amplification means to the speaker as a loudspeaker signal is prohibited. As described above.

The display means for displaying the magnitude of the received voice signal amplified by the amplifying means includes a level detector of the received voice signal, and a light emitting diode array which is turned on / off by a signal from the level detector. It can be composed of things.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention and embodiments of the present invention will be described in more detail with reference to the preferred embodiments shown in the drawings. The present invention is not limited to these embodiments.

[0014]

In FIG. 1, a free-hand communication apparatus 1 for a telephone according to the present invention includes an amplifying means 3 for amplifying a received voice signal of a telephone 2, and a speaker for amplifying the received voice signal amplified by the amplifying means 3. 4, a detecting means 5 for detecting the presence of the received voice signal of the telephone 2, a microphone 6 for receiving the voice of the speaker to the telephone 2, and a transmission of the received voice signal from the microphone 6 as a transmission voice signal. A prohibition means 7 for prohibiting the detection based on a detection signal from the detection means 5, another detection means 8 for detecting the absence of the received voice signal of the telephone 2, and a detection signal from the other detection means 8. Another prohibiting means 9 for prohibiting the amplified signal from the amplifying means 3 from being transmitted to the speaker 4 as a loudspeaker signal; another amplifying means 10 including an operational amplifier for amplifying the sound signal received by the microphone 6; It is provided with a display means 11 for displaying in size of the amplified received speech signal.

The telephone 2 of the present embodiment is a portable telephone,
External earphone jack 21 and external microphone jack 2
And 2. The freehand communication device 1 is formed separately from the telephone 2, and the input jack 23 and the output jack 24 of the freehand communication device 1 are connected to an external earphone jack 21 and an external microphone jack 22 via connection cables 25 and 26. Connected to each other.

The amplifying means 3 includes a preamplifier including an operational amplifier and an audio power amplifier, and can manually adjust the input level of the audio signal received from the telephone 2 to the audio power amplifier via the input jack 23. Thus, a variable resistor is further provided at a stage between the preamplifier and the audio power amplifier.

The detecting means 5 rectifies the received audio signal from the buffer amplifier 27 and a buffer amplifier 27 composed of an operational amplifier or the like to which the received audio signal from the telephone 2 is input via the input jack 23, and converts the signal into a direct current. Rectifier circuit 28
Is provided.

The prohibiting means 7 comprises switching means such as a transistor or a reed relay, and turns on the transistor or the reed relay of the switching means by a DC voltage as a detection signal from the rectifier circuit 28, thereby turning on the amplifying means 1.
0 is grounded to prohibit the sound signal received from the microphone 6 via the amplifying means 10 from being transmitted to the output jack 24 as a transmission sound signal.

In this embodiment, the detecting means 8 comprises an inverter circuit or the like for inverting the detection signal from the detecting means 5, but similarly to the detecting means 5, independently rectifies a buffer amplifier and a received audio signal from the buffer amplifier. Then, a rectifying circuit for converting to direct current may be provided.

The prohibiting means 9 includes switching means such as a transistor or a reed relay, like the prohibiting means 7, and uses a DC voltage as a detection signal from the detecting means 8 to switch the transistor or the reed relay of the switching means. In the ON state, the output side of the amplification unit 3 is grounded, and the transmission of the amplified signal from the amplification unit 3 to the speaker 4 as a loudspeaker signal is prohibited.

The display means 11 is a level detector for detecting the level (magnitude of the amplitude) of the amplified received audio signal from the amplifying means 3 via the prohibiting means 9, and is turned on / off by a signal from the level detector. The size of the received audio signal amplified by the amplifying means 3, in other words, the volume of the speaker is displayed based on the number of light emission of the light emitting diode array.

In the above-described freehand communication device 1, during a call, the received voice signal of the other party is amplified from the speaker 4 via the jack 21, the connection cable 25, the jack 23, the amplifying means 3 and the prohibiting means 9, but For example, when the freehand communication device 1 and the telephone 2 are arranged in a car, for example, the driver of the vehicle can talk to the other party without holding the freehand communication device 1 and the telephone 2 in particular. You can hear Then, when the reception sound signal of the other party exists, the prohibition means 7 is operated by the detection signal from the detection means 5, and the sound reception sound signal from the microphone 6 via the amplification means 10 is transmitted to the jack 24. However, the conversation of the other party louder from the speaker 4 is received again by the microphone 6 and the jack 2
4. When the other party can talk well without being transmitted to the other party's telephone via the connection cable 26, the jack 22, and the telephone 2, and when the other party is talking using the speaker, There is no possibility that howling occurs. Further, the volume of the speaker 4 of the conversation of the other party can be confirmed by the indicating means 11.

When there is no voice signal received by the other party, the conversation of the driver of the car, which is received by the microphone 6, is performed by the amplifying means 10, the jack 24, and the connection cable 2.
6, and transmitted to the telephone of the other party via the jack 22 and the telephone 2. Then, when the reception voice signal of the other party does not exist, the prohibition unit 9 is operated by the detection signal from the detection unit 8, and the amplified noise from the amplification unit 3 is not transmitted to the speaker 4 and uncomfortable. Noise is not amplified from the speaker 4. Also, when there is no other party's received voice signal, the light emitting diode array of the display means 11 does not emit light.

[0024]

As described above, according to the present invention, a telephone call can be made completely freehand, a good telephone call can be ensured, howling during a telephone call can be prevented, and the voice of the other party can be transmitted. When there is no speaker, noise from the speaker can be suppressed, and a good call can be made possible.

[Brief description of the drawings]

FIG. 1 is an electric circuit diagram of a preferred embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Free hand communication apparatus 2 Telephone 3 Amplification means 4 Speaker 5 Detection means 6 Microphone 7 Prohibition means

Claims (12)

[Claims] 1. Amplifying means for amplifying a received voice signal of a telephone, a speaker for amplifying the received voice signal amplified by the amplifying means, detecting means for detecting the presence of the received voice signal of the telephone, and talk to the telephone. Call for a telephone, comprising: a microphone for receiving a voice of a person; and a prohibition unit for prohibiting, based on a detection signal from a detection unit, transmission of a sound reception voice signal from the microphone as a transmission voice signal. apparatus. 2. The telephone according to claim 1, wherein the telephone is a wired telephone.
A free-hand communication device for a telephone according to claim 1. 3. The telephone according to claim 1, wherein the telephone is a wireless telephone.
A free-hand communication device for a telephone according to claim 1. 4. The freehand communication device for a telephone according to claim 3, wherein the telephone is a mobile telephone. 5. The telephone according to claim 1, which is built in the telephone.
A freehand communication device for a telephone according to any one of the preceding claims. 6. The freehand communication device for a telephone according to claim 1, which is formed separately from the telephone. 7. The prohibition means includes a switch means, and is configured to operate the switch means to prohibit transmission of a sound reception signal from the microphone as a transmission sound signal. Item 7. A freehand communication device for a telephone set according to any one of Items 1 to 6. 8. The apparatus further comprises another amplifying means for amplifying a sound reception sound signal of the microphone, wherein the prohibition means stops the amplification function of the other amplification means and transmits the sound reception sound signal from the microphone. The freehand communication device for a telephone according to any one of claims 1 to 7, wherein the device is configured to prohibit transmission as an audio signal. 9. A detecting means for detecting the absence of a voice signal received by the telephone, and transmitting the amplified signal of the amplifying means to the speaker as a loudspeaker signal based on the detection signal from the other detecting means. The freehand communication device for a telephone according to any one of claims 1 to 8, further comprising another prohibition means for prohibition. 10. The other prohibiting means includes a switch means, and is configured to operate the switch means to prohibit the amplification signal of the amplifying means from being sent to a speaker as a loudspeaker signal. A freehand communication device for a telephone according to claim 9. 11. The prohibition means for stopping the amplification function of the amplifying means and prohibiting the amplified signal of the amplifying means from being transmitted to a speaker as a loudspeaker signal. A free-hand communication device for a telephone according to claim 1. 12. The apparatus according to claim 1, further comprising display means for displaying the magnitude of the received audio signal amplified by the amplification means.
A freehand communication device for a telephone according to any one of claims 1 to 11.