CN2273084Y

CN2273084Y - Infrared wireless mobile earphone

Info

Publication number: CN2273084Y
Application number: CN 96223488
Authority: CN
Inventors: 陈清智
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-21
Filing date: 1996-08-21
Publication date: 1998-01-21
Anticipated expiration: 2006-08-21

Abstract

The utility model relates to an infrared wireless mobile earphone used for listening sound generated by television sound or other sound source equipment. The utility model comprises a general earphone receiver, a transmitter and a receiver, wherein, the transmitter is provided with a sound source signal input interface; the receiver is connected with the earphone receiver and is mutually separated from the transmitter which mainly comprises a crystal triode and an Infrared light emitting diode; the receiver mainly comprises an infrared receiving tube, a crystal triode and an integrated amplifier. The transmitter converts audio signals into infrared light wave signals, the receiver receives the infrared light wave signals and regulate the infrared light wave signals into the audio signals to input the audio signals into the earphone receiver. The earphone receiver of the infrared wireless mobile earphone is moved freely so as to eliminate the wire winding trouble.

Description

Infrared radio moves earphone

The utility model relates to a kind of infrared radio and moves earphone, is used to listen to the sound equipment of television field frame or the generation of other audiogenic device.

People are when televiewing or listen to music, for avoiding influencing other people study or rest, the normal wired earphone that uses is listened to sound accompaniment, this earphone needs to link to each other with television set by lead, and normal accident, the especially movings range such as broken string, coiling of occurring are limited by lead, use very inconvenient, and a television set (or radio-cassette player) can only connect an earphone, used by a people, can not many people use simultaneously.

The purpose of this utility model provides a kind of infrared radio and moves earphone it can eliminate line puzzlement between earphone and the sound source device, uses more conveniently, and can many people listen to simultaneously.

The utility model is provided with common headphones receiver, a reflector, a receiver, and reflector is provided with sound-source signal input interface A1, receiver link to each other with receiver and with reflector chorista each other; Said reflector mainly contains transistor BG1 and infrarede emitting diode D1, D2, its circuit connecting relation is: collector series connection infrarede emitting diode D1, D2 and the resistance R 2 of transistor BG1, series resistor R1 and capacitor C 1 between the emitter of BG1 and the base stage, R1 links to each other with sound-source signal input interface A1 with C1 simultaneously; Said receiver mainly contains infrared receiving tube D3, D4, D5, transistor BG2 and integrated amplifier LM386, its circuit connecting relation is: each negative terminal of infrared receiving tube D3, D4, D5 links to each other with the base stage of transistor BG2 by capacitor C 2, the collector electrode of BG2 is connected with the input (contact 3) of integrated amplifier LM386 by capacitor C 3, and the output of amplifier LM386 (contact 5) is answered a L by capacitor C 5.In the utility model, reflector can convert the audio signal of sound source device to the infrared waves signal, and receiver receives this lightwave signal and is situated between and is adjusted to audio signal input receiver.Above-mentioned reflector can be external in sound source device by connector, also can be by pack into the inside of sound source device of line.

The utility model infrared radio moves in the earphone, and receiver links to each other with receiver, and separates with reflector and sound source device, thereby realize that wireless listening to avoid on line puzzlement, can arbitrarily move, the distance that particularly televiews need not to be subjected to the restriction of on line length, and is easy to use.A reflector also can be received simultaneously by a plurality of receivers, is listened to simultaneously by many people.Owing to adopt the micropower emission, so little power consumption does not disturb miscellaneous equipment, receiver adopts weak signal to receive sound accompaniment definition height.

Below in conjunction with description of drawings example structure of the present utility model.

Fig. 1 is the transmitter circuit schematic diagram that this infrared radio moves earphone.

Fig. 2 is the acceptor circuit schematic diagram.

Transmitter circuit is input to transistor BG1 power amplification from the audio signal of television set by input interface A1 as shown in Figure 1, and load-modulate is outwards launched with the infrared waves signal on infrared transmitting tube D1, D2.R1 in the circuit is an input resistance, and C1 is the signal capacitance, and R2 is the quiescent operation biasing resistor.

Acceptor circuit is seen Fig. 2.Highly sensitive infrared receiving tube D3, D4, D5 receive lightwave signal, and being situated between to turn through R3 and C2 changes audio signal into, is input to preamplifier transistor BG2, through capacitor C 3 every directly, signal is imported power amplifier level amplifier LM386, promote headset earpiece L, send the sound accompaniment sound through C5.R4, R5 are the biasing resistor of preamplifier state in the circuit, R6 is the input resistance of power amplifier level, and C4 is the partially installing capacitor of power amplifier level, and C6 is a power capacitor, K2 among K1 and Fig. 1 is respectively the mains switch of reflector and receiver, and E1 and E2 are the working power of reflector and receiver.

In the utility model, reflector and receiver all can be made into box-like body, and interior dress wiring board and battery, reflector are provided with external line and can link to each other with the earphone jack of audiogenic device with socket.The said receiver of the utility model is common headphones, and receiver can be fixed on the headset earpiece outside, and the two fuses.Transmitter circuit is as inserting the inside of audiogenic device, and effect is also identical.

Claims

1. infrared radio moves earphone, is provided with the common headphones receiver, it is characterized in that also having a reflector and a receiver, and reflector is provided with sound-source signal input interface A1, receiver link to each other with receiver and with reflector chorista each other; Said reflector mainly contains transistor BG1 and infrarede emitting diode D1, D2, its circuit connecting relation is: collector series connection infrarede emitting diode D1, D2 and the resistance R 2 of transistor BG1, series resistor R1 and capacitor C 1 between the emitter of BG1 and the base stage, R1 links to each other with sound-source signal input interface A1 with C1 simultaneously; Said receiver mainly contains infrared receiving tube D3, D4, D5, transistor BG2 and integrated amplifier LM386, its circuit connecting relation is: each negative terminal of infrared receiving tube D3, D4, D5 links to each other with the base stage of transistor BG2 by capacitor C 2, the collector electrode of BG2 is connected with the input (contact 3) of integrated amplifier LM386 by capacitor C 3, and the output of amplifier LM386 (contact 5) is answered a L by capacitor C 5.

2. infrared radio according to claim 1 moves earphone, it is characterized in that reflector can be external in sound source device by connector, also can be by pack into the inside of sound source device of line.