CN2169960Y

CN2169960Y - TV set induction receiver

Info

Publication number: CN2169960Y
Application number: CN 93210408
Authority: CN
Inventors: 吕田
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-13
Filing date: 1993-04-13
Publication date: 1994-06-22
Anticipated expiration: 2003-04-13

Abstract

The utility model discloses a TV induction receiving device, belonging to the electronic field. The utility model solves the problems existing in the high level listening of television sound and the miniaturization and the facilitation of the receiving device. The utility model is mainly characterized in that mutual conversion between electromagnetic signals is realized for the television sound through a transmitter and a receiver which are composed of electromagnetic coils and amplification lines. The utility model has the advantages of simple lines and low cost. Through the utility model, people can listen in to and watch programs without action limitation, and no influence is exerted on other people.

Description

TV set induction receiver

Television set induction audio signal reception device of the present utility model belongs to the wireless radio reception technology of television audio.

The sound accompaniment of television set is outwards to play by the TV loudspeaker at present, and its sound equipment influences other people work, study or rest sometimes; Number of patent application is 91213114.4 television acoustics wireless receiver, its patent application is to adopt through a matched impedance to transport to prime signal amplifier, bandpass amplifier, power amplifier and loud speaker to the emitter of launching lead and with the induction coil electromagnetic signal that is coupled, to realize the sound equipment wireless receiving of TV.

The purpose of this utility model is to propose a kind of under the prerequisite of the work of not standing in other's way, study and rest, does not listen to the television set induction audio signal reception device of TV programme sound accompaniment with not being subjected to position limit.

The technical solution of the utility model is to combine by transmitter and receiver two parts that electromagnetic induction is coupled.

Transmitter is to reach loop A by the sound accompaniment signal of telecommunication that the television set earphone jack spreads out of through amplifying circuit, and the sound accompaniment signal of telecommunication that is changing can produce the magnetic field that respective change in loop A.Thereby finish emission function, the coil B of receiver is the electric current that is changing with the magnetic field induction of this variation, reaches earphone through amplification again, and the sound accompaniment of TV programme just clearly spreads out of by earphone like this.

Accompanying drawing 1 is television set induction audio signal reception device structure diagram.

Accompanying drawing 2 is the line map of television set induction audio signal reception device.

The transmitter and receiver of this device all adopts three grades of identical amplifying circuits among the figure, T1, T2, T3, T4, T5, T6 have all adopted the 3AX transistorlike, C1, C2, C3, C4 are about 2～4.7 μ F, R1, R5 are about 8～12K Ω, R2, R6 are about 4～8K Ω, R3, R7 are about 2～6K Ω, and R4, R8 are about 1K Ω, and the transmitter coil area is 100～500CM ²About.

Application example of the present utility model:

The transmitter and receiver of this device all adopts three grades of identical amplifying circuits, amplifying circuit transistor Ts 1 at different levels, T2, T3, T4, T5, T6 have all adopted the 3AX31C transistor, C1, C2, C3, C4 are about 2～4.7 μ F, R1, R5 are about 10K Ω, R2, R6 are about 6K Ω, R3, R7 are about 4K Ω, and R4, R8 are about 12K Ω, and the transmitter coil area is 300CM ²About.Every grade of multiplication factor is about 500db, and the loop A number of turn of transmitter is about 400 circles, and the receiver coil B number of turn is about 1000 circles, and on bar magnet.

Television set induction audio signal reception device of the present utility model has overcome the loud speaker sound interference, and other people work, learn or have a rest, the defective that wired earphone then makes televiewer's action be restricted, have and neither disturb other people, do not influence the advantage of televiewer's action again, during actual the use, transmitter is with low cost, is easy to promote.Transmitting range is short, and does not take communication, broadcasting, television frequency.

Claims

1, television set induction audio signal reception device, combine by transmitter and receiver, transmitter and receiver amplifies the induction radio reception that realizes the television audio signal by in-plant electromagnetic coupled, it is characterized in that transmitter draws television audio signals by the plug of television set earphone jack, reach the number of turn on the loop A about 400 circles through amplifying circuit, receiver is that the coil B of about 1000 band bar magnet forms by the three grades of amplifying circuits and the number of turn.

2, television set induction audio signal reception device as claimed in claim 1, three grades of amplifying circuits that it is characterized in that described transmitter and receiver are identical, T1, T2, T3, T4, T5, T6 have all adopted the 3AX transistorlike, C1, C2, C3, C4 are about 2～4.7 μ F, R1, R5 are about 8～12K, and R2, R6 are about 4～8K, and R3, R7 are about 2～6K, R4, R8 are about 1K, and the transmitter coil area is 100～500CM ²About.