CN2100066U - T.v. set with automatic closing device - Google Patents

Abstract

The utility model relates to a TV provided with an automatic turning off device. The utility model is characterized in that the TV provided with an automatic turning off device can automatically turn off when a user falls asleep to forget turning off the TV after watches the television program. The TV provided with an automatic turning off device can protect the TV and extend the service life of the TV. A synchronous separation output pole of the TV provided with an automatic turning off device is provided with a turning off control device, and a synchronal signal of the turning off control device can control a power supply of the TV to switch on and off through the rectification, comparison and amplification to realize an automatic TV turning off function.

Description

T.V. set with automatic closing device

The utility model relates to a kind of television set.

Now, after TV programme that television set is watched finishes, just should the closing television machine or conversion the channel of program is arranged, but often some people is just sleeping when seeing TV, forgets the closing television machine, the time has been grown and has just burnt out television set easily.

For preventing sleeping to forget that the phenomenon of closing television machine takes place, the present utility model the television set that can close automatically after finishing of program of radio station.

Of the present utility model being contemplated that adds a device in existing television set, the synchronizing signal of getting the separated in synchronization output stage is controlled the mains switch of this television set.

Fig. 1, Fig. 2 are the utility model shutdown control circuit figure.

Fig. 3 is the utility model linked switch structure chart.

This television set by casing, picture tube, tuner, in put, detection, sound accompaniment, row-field scanning, separated in synchronization device, shutdown control device etc. constitute, the signal source of shutdown control device is taken from the output stage of separated in synchronization device, current-limiting resistance R ₁With inductance L ₁Capacitor C ₁, C ₂The filter of forming connects, diode D ₁And capacitor C ₃Form charging circuit and give C ₃Charging provides compound transistor BG ₁, BG ₂Operating voltage, BG ₂Grounded emitter, let out can diode D ₇Parallel connection and compound transistor BG ₁, BG ₂And BG ₄, BG ₃Collector electrode, emitter two ends, diode D ₃～D ₆Be connected in series in multiple tube BG ₁, BG ₂Base stage play every ending voltage effect (2.4 volts), diode D ₂Be parallel to D ₁The two ends constituent ratio is than potential circuit, K switch ₁Be parallel to capacitor C ₃Two ends.Relay J and TV set power switch K ₄Series connection, delay control circuit is by capacitor C ₄, resistance R ₅Potentiometer W ₁Deng composition, sampling amplification circuit is by triode BG ₅, diode D ₈Resistance R ₃, R ₄Deng composition, BG ₅Collector electrode and BG ₄Base stage link BG ₅Emitter meet D respectively ₈, R ₃An end, R ₃And C ₄One end ground connection, C ₄The other end passes through K switch ₃With R ₄Be concatenated into power supply E _COn, R ₅, W ₁Series connection back cross-over connection C ₄Two ends.C ₄Pass through R ₅, W ₁Discharge and recharge to BG ₅, D ₈The conducting electric current is provided, works as BG ₅Compound transistor BG is provided after the conducting ₃, BG ₄The conducting electric current is close to the both end voltage that relay J is fallen on the road, reaches the purpose of automatic closing television machine.(as Fig. 3) K switch ₁, K ₂, K ₃, K ₆Be the contact of linked switch LK, when selecting automatic closing television function, earlier LK placed the position No. 2, and close K ₁, K ₂, K ₃, K ₆All conductings, relay J action, K switch ₅Potentiometer W is adjusted in conducting ₁Select suitable time expand to put LK again in No. 3 positions, K switch ₁, K ₃, K ₆Disconnect K simultaneously ₂Conducting, K switch ₅Conducting, this moment, television set was subjected to automatic closing control.

The utility model is more additional circuit in existing television set, and is simple in structure, must not revise the circuit in the former television set, prevents that forgetting the phenomenon of closing television machine because of sleep takes place, and protected television set, prolongs its useful life.

Claims (1)

1, a kind of by casing, picture tube, tuner, in put, automatic closing television machine that detection, sound accompaniment, row-field scanning, separated in synchronization device constitute, the signal of the control device that it is characterized in that shutting down is taken from the output stage of separated in synchronization device, current-limiting resistance R ₁With inductance L ₁, capacitor C ₁, C ₃The filter of forming connects, diode D ₁And capacitor C ₃Form charging circuit and give C ₃Charging provides compound transistor BG ₁, BG ₂Operating voltage, BG ₂Grounded emitter, let out can diode D ₇Parallel connection and compound transistor BG ₁, BG ₂And BG ₄, BG ₃Collector electrode, emitter two ends, diode D ₃～D ₆Be connected in series in multiple tube BG ₁, BG ₂Base stage, diode D ₂Be parallel to D ₁The two ends constituent ratio is than potential circuit, K switch ₁Be parallel to capacitor C ₃Two ends, an end of relay J passes through K switch ₂Connecting resistance R ₂, other end ground connection, contact R ₅With K switch ₆Back in parallel and TV set power switch K ₄Series connection, delay control circuit is by capacitor C ₄, resistance R ₅Potentiometer W ₁Deng composition, sampling amplification circuit is by triode BG ₅, diode D ₈, resistance R ₃, composition such as R4, BG ₅Collector electrode and BG ₄Base stage link BG ₅Emitter meet D respectively ₈, R ₃An end, R ₃Other end ground connection, D ₈Another termination power E _c, C ₄One end ground connection, the other end passes through K switch ₃With R ₄Be concatenated into power supply E _cOn, R ₅, W ₁Series connection cross-over connection C ₄Two ends.

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