Interphone

[Detailed Description of the Invention]

Field of the Invention It is related with the present invention switching automatically the transmission of an interphone which performs mutual communication, and a reception function. PRIOR ART A mutual communication interphone consists of a speaker for use in both transmitting and receiving, a transmitting circuit which modulates the audio signal inputted from the speaker and it takes out to a signal wire, and a receiving circuit which restores to the signal from a signal wire, is made into an audio signal, and is taken out to a speaker. The change of transmission and a reception function is performed by a speaker's switching and pushing a switch, and is using transmission and a reception function to time sharing. The problem which an invention tends to solve A switch must be touched by the wet hand or the hand to which soap was attached, and it is necessary to carry out the change of transmission and a reception function to all the change To do sake of transmission and reception on use of apparatus in a place like [ in a bathroom ], without [ which is not preferred ] there describing apparatus. The means for solving a problem In order to solve this problem, the human body detection circuit which makes the detection range the front of a speaker for use in both transmitting and receiving, and the volume detector circuit which detects whether the volume more than setting volume entered shall be provided, and the change of transmission and a reception function shall be performed automatically. OPERATION In order that a speaker may transmit, when a mouth is brought close to a speaker for use in both transmitting and receiving, it is detection within the limits (- Enter and a detection signal are outputted.) of 1 human-body detection circuit. If a speaker utters a sound, it will be detected in a volume detector circuit, and a detection signal will be taken out if the volume north of setting volume enters. Therefore, it is without a speaker switches and it pushes a switch by uttering a sound near the speaker for use in both transmitting and receiving for transmission, since it switches from a reception function to a transmitting function. The example which can perform the change of transmission and a receiver Based on the one example complete diagram side of the present invention, it explains below. In Drawing 1, speaker 1 for use in both transmitting and receiving is connected to Sending 1 word circuit 3 and receiving circuit 4 by the change signal of transceiver change circuit 2, and it has a microphone function at the time of transmission, and it has a speaker function at the time of reception. At the time of transmission, a sound is collected and it is inputted into transmitting circuit 3 by speaker 1 for use in both transmitting and receiving as an audio signal. It modulates, and the audio signal inputted into transmitting circuit 3 is joint circuit 5r Passed, and is outputted to a signal wire. A signal is inputted into receiving circuit 4 via joint circuit 5 from a signal wire at the time of reception. It gets over and the inputted signal is outputted to speaker 1 for use in both transmitting and receiving as an audio signal. Human body detection circuit 6 uses an infrared sensor or an ultrasonic sensor, and has a thing again. If the detection range of human body detection circuit 6 tends to consider it as the narrow range of less than about 20 CIn of fronts of speaker 1 of interphone 9 for use in both transmitting and receiving established in wall 8 like an example shown in Drawing 2, a speaker is going to transmit and a mouth is brought close to speaker 1 for use in both transmitting and receiving, it shall be detected within detection range 10. Volume detector circuit 7 takes out a detection signal, when the peak value of the audio signal inputted by the speaker etc. or the integral value per unit time exceeds the preset value set up beforehand. When transceiver change circuit 2 is usually connected to the receiving circuit 4 side and the detection signal is inputted from human body detection circuit 6, When a detection signal is inputted from volume detector circuit 7, once connection is switched to the transmitting circuit 3 side and it is switched to the transmitting circuit 3 side, it will remain connected to the transmitting circuit 3 side until the detection signal from human body detection circuit 6 stopped. Since a mouth was brought close to speaker 1 for use in both transmitting and receiving, it switched to Sending and a talk function by emitting voice 2 and it switched to a receiver function by separating further, it became unnecessary therefore, to touch apparatus by the wet hand etc. Since the object for the averages of the volume detection was carried out to 1 human-body detection, when it approaches near the speaker for use in both transmitting and receiving at the times other than transmission, the fault of switching to a transmission function can also be canceled. EFFECT OF THE INVENTION Since the human body detection circuit which makes the detection range the front of a speaker for use in both transmitting and receiving, and the volume detector circuit were provided, a mouth is brought close to a speaker for use in both transmitting and receiving, and it became unnecessary to have been able to switch to the Snowing function and to push a change switch by detaching a transmitting function and a mouth, by uttering a sound. By carrying out the object for the averages of the sound 'ri detection to 1 human-body detection, when it approached in the front of a transmission-and-reception 1 word combination speaker in other than transmission, it was able to prevent switching to a transmitting function. When using it in a place like [ in a bathroom ], apparatus is not touched by the wet hand etc., and it is that of To * Mu, and is desirable on use of apparatus.

[Brief Description of the Drawings]

The circuit block diagram of the interphone which Drawing 1 shows one example of the present invention, and Drawing 2 are outline perspective views showing the detection range of a member object detection circuit. 1 ------- 1 A spoker for use in both transmitting and receiving, 6 ------- A human body detection circuit, 7 ------ Volume detector circuit.