CN2169961Y - Time delay power cut-off automatic switch for remote control television set - Google Patents

Abstract

The utility model discloses an automatic time delay power-down switch for remote-control televisions, which can cut off the general supply of remote-control televisions. One end of the automatic switch is electrically connected with the power socket, and the other end of the automatic switch is electrically connected with the power plug of a remote-control television. The utility model clamps the electric potential of a timing unit according to the microcurrent induced by a current transformer of the utility model under the condition of no-load starting and with the interior relay contacts closing, so that the relay continues to keep closed. When the watching of programs is over, the microcurrent disappears, and the electrical potential of the timing unit rises with time, which causes the relay contacts to trip off, thereby, obtaining the purpose of cutting off the power supply of the remote-control television.

Description

Time delay power cut-off automatic switch for remote control television set

The utility model relates to the electronic installation that a kind of time-delay automatically shuts down the remote-controlled television set general supply, especially just no longer the various switches of remote manual control television set itself have been removed after using this electronic installation, and when cutting off TV set power, the power supply of this electronic installation itself also is cut off.

The available data that comes out by retrieval shows, some present similar devices or the necessary circuit of changing television set inside; The necessary manually switch of television set itself; When starting, must use the big electric current ability of the work self-sustaining of television set; Be that the complex structure cost is higher.

The purpose of this utility model provides a kind of simple, reliable, safe, low-cost, must not change the television set internal wiring, just be connected between television set and the supply socket, when starting, must not keep by big electric current with the work of television set, and unloaded just can start self-sustaining, and do not re-use a kind of electronic installation of remote-controlled television set delay cutting power of any hand switch of television set itself.

The purpose of this utility model is achieved in that divides major loop and control loop two parts to see shown in the accompanying drawing 3 in the remote-controlled television set delay cut-off automatic switch.Major loop is electrically connected by plug, relay, starting button, rectifier diode, light-emitting diode, resistance, current transformer primary side and socket, for television set provides power supply.Control loop is electrically connected by decompression capacitor, rectifier diode, electrolytic capacitor filter device, for control loop provides direct-current working volts.Charging resistor and charging electrolytic capacitor are electrically connected forms timing unit, and integrated circuit provides output voltage.Timing unit is connected with integrated circuit input end, makes ic output be subjected to the control of timing unit.Thereby make the controlled action of relay.Here designed a special clamp circuit, this circuit is electrically connected by clamp diode, transistor, current-limiting resistance, rectifier diode and Current Transformer Secondary side to be formed.Had just this clamp circuit just make television set when watching in this device the current potential on the electrolytic capacitor of timing unit can not reach the turnover voltage of integrated circuit, thereby make relay keep on-state, keep normal power supply to television set.After finishing to watch with remote controller, the principal current in the television set disappears, and clamp circuit is ineffective, through follow-up electrical equipment disconnection after a while, reaches the purpose of cutting off the television set general supply.

Owing to adopt such scheme, just can under the unloaded situation of starting, connect by relay, and when watching program, keep power supply by clamp circuit, work a period of time of delaying time of timing unit cuts off the electricity supply when finishing to watch.Simple in structure, reliable, low-cost.

The basic principle of this utility model of having a talk here: at ordinary times the plug of utility model is inserted on the commercial power socket of alternating current 220V, the attaching plug of remote-controlled television set is inserted on the socket of utility model, and the mains switch of television set is in opening.During work, click starting button above the utility model with hand, the civil power alternating current 220V just by button through the decompression capacitor step-down, produce direct-current working volts behind rectifier diode and electrolytic capacitor filter device, this voltage provides work for integrated circuit, relay, transistor, electrolytic capacitor.Because the voltage of charging electrolytic capacitor and integrated circuit input end progressively raises in time, ic output is not in high potential before still reaching turnover voltage, relay coil gets, contact closure, light-emitting diode is bright, the utility model energized is turned on television set with remote controller then.Watch program state in case television set is in, the main circuit in this utility model has just produced a big operating current, because the primary side of current transformer is to be serially connected in the major loop, certainly leads to a little electric current at secondary side.This electric current is after rectifies, add a positive voltage for the transistor base stage by current-limiting resistance, make the transistor collector voltage reduce, the current potential of integrated circuit input end is just vised by the clamp diode that is electrically connected with transistor like this, make it and to rise, do not reach the turnover voltage of integrated circuit, relay still remains closed.After finishing to watch with remote controller, television set has lost operating current, and only keeps the electric current of receiving infrared-ray, the too little deficiency of this electric current so that clamp circuit have an effect.Therefore the timing unit charging process begins, and the integrated circuit input end current potential raises in time, and when it reached 2/3 operating voltage, output suddenlyd change to electronegative potential from high potential.Relay disconnects, and cuts off the complete machine power supply.When watching program,, no longer remove the various switches of manual television set itself next time, both reached the purpose of automatic cut-out remote-controlled television set power supply, avoided the switch wearing and tearing of television set again, prolonged the life-span as long as clicking starting button gently just repeats said process.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1, Fig. 2 are the outline drawings of embodiment.

Fig. 3 is the circuit theory diagrams of utility model.

The input of Fig. 1, Fig. 2 embodiment is designed to the form of an attaching plug, output is designed to the form of a supply socket, form a whole, major loop and control loop are packed into wherein, shell is that ABS plastic is made, plug and shell are connected as a single entity when making, and socket then is installed on the interior wiring board of shell.

Among Fig. 1, AN is starting button φ 5mm; D ₁₂Be red light emitting diodes φ 3mm; CZ is a single-phase socket; A is 50mm; B is 75mm.

Among Fig. 2, c is 35mm; D is 29mm; E is 10mm; F is 18mm; G is 6mm; CT is a Single-phase plug.

AN is starting button KAX-2 among Fig. 3; C ₀Be decompression capacitor 400V, 0.68 μ F; D ₁, D ₂, D ₃, D ₄For the rectifier diode IN4007 of direct-current working volts is provided; C ₁Be electrolytic capacitor filter device 16V, 100 μ F; C ₂Be charging electrolytic capacitor 16V, 470 μ F; D ₅Be clamp diode IN4001; D ₆, D ₇, D ₈, D ₉Be control rectifier diode IN4001; D ₁₀Be discharge diode IN4001; D ₁₁For showing rectifier diode IN4001; It is NE555 that integrated circuit provides operation voltage to relay; R ₁Be resistance 2M Ω; R ₂Be resistance 2k Ω; R ₃Be resistance 240k Ω; R ₄Be resistance 300 Ω; R ₅Be resistance 100k Ω; Above resistance is 1/16W.BG is transistor 9014C; B is a current transformer, the E19 that uses unshakable in one's determination, and the elementary φ 0.8mm enamelled wire of using is around 10 circles, and the inferior utmost point encloses around 500 with φ 0.06mm; J is miniature relay JRX-BF; D ₁₂Be light-emitting diode φ 3mm.

R in the timing unit ₁With C ₂Data be directly connected to the time length of this utility model delay cut-off, R in the example ₁Be 2M Ω, C ₂Be 470 μ F, actual time delay is about 20 minutes.If R ₁Be 1M Ω, C ₂Be 470 μ F, time-delay is about 10 minutes; If R ₁Be 500M Ω, C ₂Be 470 μ F, time-delay is about 5 minutes.Here using " being about " is the error of considering element itself.

Claims (3)

1, a kind of remote-controlled television set delay cut-off automatic switch, in switch, major loop is by attaching plug, relay, button, rectifier diode, light-emitting diode, current transformer, supply socket are electrically connected in proper order, control loop is electrically connected by decompression capacitor, rectifier diode, electrolytic capacitor filter device, integrated circuit, charging electrolytic capacitor, relay coil, and it is characterized in that: Current Transformer Secondary side, rectifier diode, resistance, transistor, clamp diode, electrolytic capacitor are electrically connected in proper order.

2, remote-controlled television set delay cut-off automatic switch according to claim 1 is characterized in that the clamp diode positive pole is connected with charging electrolytic capacitor positive electrical, and negative pole is electrically connected with the transistor collector electrode.

3, remote-controlled television set delay cut-off automatic switch according to claim 1 is characterized in that the base stage of transistor and current-limiting resistance, rectifier diode, and the Current Transformer Secondary side is electrically connected.

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