JPS6243940A - Telephone set - Google Patents

Abstract

PURPOSE:To eliminate the transmission of voice at useless interruption to an opposite talking party by detecting a distance between a transmitter-receiver and a telephone set main body and making a sending voice silent when the distance reaches a prescribed value or below. CONSTITUTION:When the transmitter-receiver 1 is hooked off for talking, an ultrasonic wave signal from an ultrasonic wave oscillating circuit 9 is sent in space from an ultrasonic transmitter 3. When the talking is finished and the transmitter-receiver 1 is hooked on the telephone set main body, the ultrasonic wave transmitter 3 approaches an ultrasonic wave receiver 6. Thus, the level of the ultrasonic wave signal sent from the ultrasonic wave receiver 6 to the ultrasonic wave detection circuit 8 is increased and when the level exceeds a prescribed level, a switch 10 is interrupted to interrupt a sound signal from the sender 4 and silence is given to an opposite talking party. In this case, since a prescribed distance is given between the transmitter-receiver 1 and the telephone set 5, they are not allowed to contact with each other and unpleasant noise at contact is not given to the opposite party.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a telephone with a handset.

[Conventional technology]

Conventionally, with this type of telephone, disconnecting the line was accomplished by simply placing the handset on the hook switch of the telephone body.

[Problem that the invention seeks to solve]

According to the above-mentioned conventional telephone, the line is disconnected by mechanical contact between the handset and the hook switch, so when the handset is placed on the hook switch, the handset is disconnected before the hook switch is activated. This has the drawback that it often collides with other parts of the telephone body, and at that time, the loud sound can be heard by the other party, causing discomfort to the other party.

[Means for solving problems]

The telephone of the present invention is a telephone equipped with a handset having a handset 8 and a transmitter, and a main body connected to a subscriber circuit and having an internal circuit for transmitting audio signals to the handset and the transmitter. means for detecting that the distance between the handset and receiver 9 bodies is below a certain level and outputting distance information; and silencing the audio signal sent from the internal circuit to the subscriber circuit in accordance with the distance information. It is characterized by comprising means.

〔Example〕

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

FIG. 1 is a circuit diagram of an embodiment of the present invention. Reference numeral 1 denotes a handset, which is composed of a handset 2, a transmitter 4, and an ultrasonic transmitter 3. 5 is the main body of the telephone, which in addition to the internal circuit 7 similar to a general telephone, includes an ultrasonic receiver 6, an ultrasonic signal detection circuit 8. It is composed of an ultrasonic oscillation circuit 9 and a switch 10. The ultrasonic signal received by the ultrasonic receiver 6 is detected by the ultrasonic signal detection circuit 8 when it reaches a preset value of one novel or more, and the switch 10 is turned off based on the detection result.

Assume that you are currently holding handset 1 and talking on the phone. The ultrasonic signal from the ultrasonic oscillation circuit 9 is sent out into space from the ultrasonic transmitter 3.

Next, when the call ends and the handset 1 is placed on the telephone main body ζ, the ultrasonic transmitter 3 approaches the ultrasonic receiver 6. Therefore, the level of the ultrasonic signal sent from the ultrasonic receiver 6 to the ultrasonic detection circuit 8 increases,
When a certain level is exceeded, the switch 10 is disconnected.

Then, the audio signal from the transmitter 4 is cut off, and the other party on the other end of the call hears it as silence. At this time, since there is a certain distance between the handset 1 and the telephone 5, the handset 1 and the telephone body 5 do not come into contact with each other, and therefore, the unpleasant sound caused by contact is not transmitted to the other party. It disappears.

In Examples 1 and 2, ultrasonic waves were used as a means for detecting distance, but infrared rays using LEDs and photodiodes, magnetic fields using Hall elements, or electrostatic induction may also be used. Things are also possible. Furthermore, it is also possible to detect the distance by measuring the tensile force of the curled cord that connects the telephone body and the handset.

〔Effect of the invention〕

As explained above, the present invention detects the distance between the handset and the telephone body, and when the distance becomes less than a certain value, mutes the transmitted sound, thereby notifying the other party of the call that the distance is unnecessary. This has the effect of eliminating the sound emitted during cutting.

[Brief explanation of drawings]

FIG. 1 is a circuit block diagram showing one embodiment of the present invention. 1...Telephone receiver, 2...Telephone receiver, 3.
... Ultrasonic transmitter, 4 ... Transmitter, 5.
...Telephone body, 6...Ultrasonic receiver,
7...4 internal circuit, 8...ultrasonic signal detection circuit, 9...ultrasonic oscillation circuit, 10...
···switch. 1st field

Claims (1)

[Claims] In a telephone comprising a handset and a handset having a handset and a handset, and a main body connected to a subscriber circuit and having an internal circuit for transmitting audio signals to the handset and the handset, the distance between the handset and the main body is means for detecting that the distance has become below a certain level and outputting distance information; and means for silencing the audio signal sent from the internal circuit to the subscriber circuit in accordance with the distance information. A telephone set.