CN2152367Y - Push button type open time delay automatic cut-off switch - Google Patents

Abstract

The utility model provides a button type open time delay automatic cut-off switch, comprising a direct current power supply circuit, a delay control circuit and a silicon control. When users press the normal open switch of the delay control circuit to switch on, the delay control circuit switches on the diode, and then the electric light of the corridor is switched on; when the normal open switch is switched off, the delay control circuit is enabled to keep the electric light to be switched on at a provided time; when exceeding the provided time, the electric light is cut off. The button type open time delay automatic cut-off switch has the advantages of long service life and good reliability.

Description

Push button type open time delay automatic cut-off switch

The utility model relates to a kind of switch that extinguishes automatically, and particularly button is opened to delay time and extinguished switch automatically.

In current society, energy savings is the problem that people are concerned about always, and the altar lamp that wherein prevents the stair passage is an energy-conservation measure.In the aisle in existing building, worker-house, public electric light is arranged all, but seldom use, reason is that lamp has been opened and forgotten and close, and causes all night kept burning day and nightly, has wasted electric energy.For this reason, once there was multiple prior art to want to overcome above-mentioned shortcoming, most typical is that application is 86209291 Chinese patent, it discloses a kind of plastics delay switch, promptly when electric light after energized, utilize the telescopic process of spring to make electric light after one, two minute, cut off the electricity supply automatically, thereby reach the purpose of economize on electricity.Application number is that 89215203.6 Chinese patent discloses a kind of stair passage power down switch, and it is by relay and delay circuit the bright back of electric light certain hour to be cut off the electricity supply automatically, and electric light is extinguished.The described plastics delay switch of first patent, owing to be to utilize the elasticity of elastomeric material to reach the time-delay purpose, thereby As time goes on, switch performances will reduce, reliability decrease.Second described power down switch of patent is owing to be the light on and off of controlling electric light by the switching of relay, thereby reliability is relatively poor, and volume is big, and particularly remodeling relay wherein uses its contact also to be easy to " fluffing " for a long time, and influences its performance.

The purpose of this utility model provides the button unlatching time-delay of a kind of long service life, dependable performance and extinguishes switch automatically.

To achieve these goals, the button that provides of the utility model is opened time-delay and is extinguished switch automatically and comprise:

Alternating current is become galvanic DC power-supply circuit, and on a branch road of above-mentioned alternating current, can be serially connected with electric light;

One input links to each other with an output of above-mentioned DC power-supply circuit, another input is by a delay control circuit that links to each other with another output of above-mentioned DC power-supply circuit with the normal open switch of diode series connection;

One controllable silicon, this silicon controlled control board links to each other with the control output end of above-mentioned delay control circuit; Its two other utmost point links to each other with two other output of described DC power-supply circuit respectively.

Button that the utility model provides is opened time-delay and is extinguished switch automatically owing to adopt above-mentioned delay circuit to control, thereby its reliability height, and the good and delay time of performance can suitably be controlled.

Fig. 1 is the circuit theory diagrams of an embodiment of the present utility model; And

Fig. 2 is the structural representation of key switch among the described embodiment of Fig. 1.

Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated.

Fig. 1 is the circuit diagram of an embodiment of the present utility model.The described button unlatching of this embodiment time-delay is extinguished switch automatically and is comprised: DC power-supply circuit 1, delay control circuit 2 and controllable silicon 3.DC power-supply circuit 1 becomes electric main (220V) into direct current.This DC power-supply circuit 1 is a bridge rectifier, and it can adopt integrated package 1N4004 * 5.Can be connected to for example street lamp ZD of worker-house corridor and aisle on the branch road of AC power, delay control circuit 2 comprises delay circuit 21 and control circuit 22.Delay circuit 21 is actually a RC charge-discharge circuit, and it is by resistance R ₂Constitute with capacitor C.Control circuit 22 is by triode BG ₁, BG ₂The direct-current coupling amplifying circuit of forming.An one output C of DC power-supply circuit 1 and an input d of delay control circuit 2 are by diode D ₅Link to each other the end of normal open switch AN and diode D with normal open switch such as key switch AN ₅" one " end link to each other an end and the resistance R of the other end and capacitor C ₂An end link to each other; Another output e of DC power-supply circuit 1 and the other end of delay control circuit 2, be that the other end of capacitor C links to each other.Triode BG ₁Base stage and resistance R ₂The other end link to each other triode BG ₂With BG ₁Adopt base stage-collector electrode directly to be coupled triode BG ₂Collector electrode, promptly the control output end of delay control circuit 2 links to each other with the control utmost point G of controllable silicon SCR.This silicon controlled anode A also promptly links to each other with the dc output end of DC power-supply circuit with two output h, k of delay control circuit respectively with negative electrode K.Simultaneously, with the branch road of controllable silicon SCR parallel connection on the resistance R of connecting ₁And LED.

Referring to Fig. 1, key switch AN is in normally open at ordinary times, so BG ₁End.BG ₂Through R ₃Obtain bias current and conducting is saturated, its collector electrode is in electronegative potential, and promptly the control utmost point of SCR is in electronegative potential, and controllable silicon SCR is closed, and electric light ZD does not work, and luminescent diode LED is luminous, and when the pedestrian presses key switch AN, DC power-supply circuit 1 is by diode D ₅To capacitor C charging, resistance R ₂Be BG ₁Provide bias current, so BG ₁Conducting, BG ₂End BG ₂Collector electrode be in high potential, the control utmost point G of controllable silicon SCR is in high potential, thereby it is in conducting state, electric light ZD is luminous, luminescent diode LED is not worked by short circuit, for the pedestrian provides illumination, behind pedestrian's reverse keys, capacitor C is through R ₂And BG ₁Be knot discharge, the voltage when the capacitor C two ends is lower than triode BG ₁The emitter junction cut-in voltage time, BG ₁End, and BG ₂Conducting, as mentioned above, controllable silicon SCR is turn-offed, so electric light ZD extinguishes, this moment, luminescent diode LED was shinny.

Should be noted that diode D ₅Play on the one hand capacitor C charging, one side are prevented the effect of capacitor C through key switch AN back discharge.

Fig. 2 is the structural representation of key switch AN among the described embodiment of Fig. 1.At present, most of buttons or push-button switch all adopt spring to control switching, and the time one is long, promptly produces rust staining, and stroke is dumb, thereby causes the circuit switching, and is unreliable.Key switch AN shown in Figure 1 comprises button 111, the first electrode contacts A, reaches the second electrode contacts B ₁And B ₂, Thin Elastic steel disc 112 and switch base 113.This Thin Elastic steel disc is a circular arc, when button 111 is not pressed, it only with the second electrode contacts B ₁And B ₂Be connected this electrode contacts B ₁And B ₂With an end of lead, diode D for example shown in Figure 1 ₅"-" end link to each other.At this moment, Thin Elastic steel disc 112 does not contact with the first electrical pickoff A, an end of this first electrical pickoff A and another lead, and for example the capacitor C among Fig. 1 "+" end links to each other, so key switch is in " disconnection " state; Work as the user, when pressing button 111 downwards with hand, this button 111 makes the circular arc distortion of stalloy 112, and it is contacted with the first electrical pickoff A, so the first electrical pickoff A is by stalloy 112(electric conductor) and the second electrical pickoff B ₁, B ₂Be connected, switch is in " conducting " state, and when user's openhanded opening, Thin Elastic steel disc 112 recovers distortion, move up so drive button 111, and itself and first electrical pickoff A disengaging, key switch is in " disconnection " state again.Switch base 113 is provided with two alignment pin H so that it is fixed, and this alignment pin H can be one or more.This key switch AN life-span can reach more than 100,000 times, and good hand touch, contact are reliable.

Certainly, above-mentioned key switch also can be replaced by the normal open switch of other type, and can realize the purpose of this utility model equally.

Concerning one of ordinary skill in the art, embodiment described in the utility model can do multiple variation, for example:

1) delay circuit 21 of time-delay switch control circuit 2 can be replaced by inductance and resistance; Control circuit 22 can obtain with plural triode coupling, or adopts general amplifying circuit and logical circuit;

2) resistance R ₁Can save with LED.

Claims (4)

1, a kind of button is opened to delay time and is extinguished switch automatically, and it comprises:

One becomes alternating current into galvanic DC power-supply circuit, and can be serially connected with bulb on a branch road of above-mentioned alternating current;

It is characterized in that it also comprises:

One input links to each other with an output of above-mentioned DC power-supply circuit, another input is by a delay control circuit that links to each other with another output of above-mentioned DC power-supply circuit with the normal open switch of diode series connection; And

One controllable silicon, this silicon controlled control utmost point links to each other with the control output end of above-mentioned delay circuit, and its two other utmost point links to each other with two outputs of described DC power-supply circuit respectively.

2, button as claimed in claim 1 is opened to delay time and is extinguished switch automatically, it is characterized in that described normal open switch comprises:

First electrical pickoff that can link to each other with a lead;

Second electrical pickoff that can link to each other with another lead;

One housing, this housing are provided with at least one and are convenient to its fixing alignment pin;

One button moving up and down; And

One Thin Elastic steel disc, this stalloy only contacts with second electrical pickoff that is connected to lead at usual state, and when moving downward when the stressed effect of above-mentioned button, it then is out of shape, and contacts with first electrical pickoff; Otherwise, when losing above-mentioned active force, its shape that then resiles, and break away from above-mentioned first electrical pickoff.

3, button as claimed in claim 1 is opened to delay time and is extinguished switch automatically, it is characterized in that described delay control circuit comprises a delay circuit and direct-current coupling amplifying circuit.

4, button as claimed in claim 3 is opened time-delay and is extinguished switch automatically, it is characterized in that described delay circuit is made up of resistance and an electric capacity; Described amplification coupling circuit is made of two triode couplings.

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