CN2162037Y

CN2162037Y - Starting time delay switch

Info

Publication number: CN2162037Y
Application number: CN 93221224
Authority: CN
Inventors: 秦秉仁
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-11
Filing date: 1993-08-11
Publication date: 1994-04-13
Anticipated expiration: 2003-08-11

Abstract

The utility model discloses a half-wave starting time delay switch which is composed of an outer shell, a half-wave rectifier, a delay circuit which is connected with the output end of the half-wave rectifier, a low-voltage starting delay circuit and a controllable silicon which is controlled by the delay circuit. In the delay circuit, an isolating diode, a time delay capacitor for a normally open switch and a trigger resistor are uniformly connected in series, then connected with a regulator tube in parallel, and then connected with a current-limiting resistor in series. The low voltage starting delay circuit is composed of a bypass transistor whose voltage division branch and base are connected with the voltage division point, emitting electrode is connected with a direct current ground and collector electrode is connected with the junction point of the current-limiting resistor and the regulator tube. The half-wave starting time delay switch has the advantages of high stability, low cost, energy saving, and capacity of prolonging the service life of lamp bulbs, being suitable for the delay control of lighting lamps in public places.

Description

Starting time delay switch

The utility model relates to a kind of electronic time-delay switch, belongs to the electric switch field.

Existing electronic time-delay switch poor stability, fragile turn on and off state owing to it makes bulb be in total head continually in addition, so bulb damages very easily.CN2086454U disclosed " difunctional time-delay battery-conserving switch " is made of its complicated in mechanical structure, poor stability the gentle controlled delay switch of push-button switch.

The purpose of this utility model provides the electronic time-delay switch that a kind of good stability, cost are low, energy-conservation, can prolong bulb service life.

The purpose of this utility model is achieved in that half-wave delays the startup delay switch and is made up of the rectifier in shell, the shell, the controllable silicon that is connected on this rectifier output end, delay circuit and low pressure soft-start circuit.Said rectifier is the half-wave rectifier that is made of rectifier diode; Said delay circuit is made up of current-limiting resistance, isolating diode, delay capacitor, triggering resistance and voltage-stabiliser tube.Wherein, isolating diode, delay capacitor, triggering resistance are connected back in parallel with voltage-stabiliser tube successively, and then connect with current-limiting resistance, and the delay capacitor two ends also connect normal open switch; The said silicon controlled control utmost point connects delay capacitor and triggers the series connection point of resistance; Said low pressure soft-start circuit connects dividing point, emitter-base bandgap grading by dividing potential drop branch road and base stage and connects the bypass triode that direct current ground, collector electrode connects current-limiting resistance and voltage-stabiliser tube series connection point and form.

When the positive half cycle of alternating current, delay capacitor is recharged and triggers the controllable silicon conducting, so bulb is lighted.In the alternating current negative half-cycle, because the blocking-up of rectifying tube, controllable silicon is turned off and causes bulb to extinguish, and this moment, electric charge that delay capacitor is deposited can not escaped owing to the isolating diode effect.Through several cycles, when institute's charging voltage reached voltage-stabiliser tube voltage stabilizing value on the delay capacitor, voltage-stabiliser tube was breakdown and with the positive half cycle current bypass, made controllable silicon can not get triggering and turn-offing, and bulb extinguishes thereupon.This section period is the delay switch delay time.At this moment electric charge that delay capacitor is deposited still keeps.Only when connecting normal open switch, just delay capacitor can be discharged, make circuit recover initial state and restart.In addition, when circuit restarted, if positive half wave voltage is higher, then the bypass triode with this time positive half wave current bypass, started circuit delay to next positive half cycle conducting, bears bigger starting current to avoid bulb.

By above narration as seen: because the utility model element is few, circuit is simple, time-delay is accurate, so cost is low, good stability; Because bulb is only lighted at positive half wave, therefore not only save electric energy, and because of filament temperature is low, its filament evaporation rate descends, and make bulb life prolong; Because start moment when if voltage is higher, bulb can not be activated and light, so can reduce the impulse current that filament starts moment, minimizing fracture of wire phenomenon further prolongs bulb life; And then because the prolongation of bulb life makes the phenomenon that causes socket short circuit or filament short circuit that delay switch is damaged because of more changing the bulb greatly reduce.

Below in conjunction with drawings and Examples the utility model is described in detail.

Fig. 1 is the circuit diagram of delayer in the utility model;

Fig. 2 is a shell rearview of the present utility model.

Bulb one termination power zero line among Fig. 1, the other end is connected with delayer by terminals D, and the power supply phase line meets terminals H.In delayer, rectifier diode D2 constitutes half-wave rectifier, and its output also meets controllable silicon T, and through indicator light D3 respectively with delay circuit and low pressure soft-start circuit and connect.Wherein: delay circuit is made up of current-limiting resistance R5, isolating diode D5, delay capacitor C, triggering resistance R 1 and voltage-stabiliser tube D6, isolating diode D5, delay capacitor C, triggering resistance R 1 three connect back in parallel with voltage-stabiliser tube D6 successively, and then connect with current-limiting resistance R5; The control utmost point of controllable silicon T meets delay capacitor C and triggers the series connection point of resistance R 1; The low pressure soft-start circuit connects this dividing point, emitter-base bandgap grading by R6, R7 dividing potential drop branch road and base stage and meets the bypass triode T3 that direct current ground, collector electrode connects current-limiting resistance R5 and voltage-stabiliser tube D6 series connection point and form.Start moment at delayer, if the positive half wave instantaneous voltage is higher than a certain set point, then the dividing point current potential can make bypass triode T3 conducting, with this positive half wave current bypass, thereby will postpone initial moment to next positive half cycle start-up time.

Be to start delay switch, at delay capacitor C two ends and connect by triode T1～T2, safe isolating diode D4, high resistant safety resistance R 4 and plastic electroplating and touch the normal open switch that button M forms.Wherein, base stage and the collector electrode of triode T1, T2 interconnect, and their emitter is as the two-end-point of normal open switch, connect the base stage of triode T1 successively through high resistant safety resistance R 4 and safe isolating diode D4 as the touch button M of normal open switch control end.

When the people touched button M, the potential difference between human body and the direct current ground will produce weak current at the eb of T1 knot, amplifies through the forward coupling of T1 and T2, make T1 and T2 saturated rapidly, thereby delay capacitor C is discharged to zero rapidly, and behind the discharge off, T1 and T2 automatically shut down because of no current.This normal open switch has overcome the delay times variation phenomenon greatly that causes owing to human body resistance is different, and switch time-delay repeatability is improved, and the index of delaying time when product lot quantity is produced is easy to control.

In addition, also draw " fire alarm " terminals J from the anode of rectifying tube D2 through forward diode D1, after " fire alarm " line closes a floodgate, because the buffer action of diode D1 and D2, make between " fire alarm " line and illumination live wire and isolate mutually, fire alarm line and delay switch are independent of each other like this.

Touch button M among Fig. 1 and the indicator light D3 that is used to refer to this delay switch position all are contained in the front of shell shown in Figure 2, and three binding posts among Fig. 2 are terminals J, D, the H among Fig. 1, and time delayer circuit is loaded in the shell.

In other embodiment of the utility model, normal open switch also can be various mechanical switchs, as push-button switch, pulling switch etc. can reset.

Claims

1, half-wave is slow starts controllable silicon T and the delay circuit that delay switch has rectifier in shell, the shell, is connected on this rectifier output end, and it is characterized in that: it also comprises the low pressure soft-start circuit; Said rectifier is the half-wave rectifier that is made of rectifier diode D2; Said delay circuit is made up of current-limiting resistance R5, isolating diode D5, delay capacitor C, triggering resistance R 1 and voltage-stabiliser tube D6, wherein, isolating diode D5, delay capacitor C, triggering resistance R 1 are connected back in parallel with voltage-stabiliser tube D6 successively, and then connect with current-limiting resistance R5, the delay capacitor two ends also connect normal open switch; The control utmost point of said controllable silicon T meets delay capacitor C and triggers the series connection point of resistance R 1; Said low pressure soft-start circuit connects dividing point, emitter-base bandgap grading by dividing potential drop branch road that is connected on rectifier output end and base stage and meets the bypass triode T3 that direct current ground, collector electrode connects current-limiting resistance R5 and voltage-stabiliser tube D6 series connection point and form.

2, according to the slow delay switch that starts of right 1 described half-wave, it is characterized in that said normal open switch is made up of triode T1～T2, safe isolating diode D4, high resistant safety resistance R 4 and the touch button M that is contained on the shell, wherein: base stage and the collector electrode of triode T1, T2 are connected to each other, their emitter is as the two-end-point of normal open switch, connects the base stage of triode T1 successively through high resistant safety resistance R 4 and safe isolating diode D4 as the touch button M of normal open switch control end.

3, according to the slow delay switch that starts of right 1 described half-wave, it is characterized in that said normal open switch is the push-button switch that is contained on the shell.

4, according to the slow delay switch that starts of right 1 described half-wave, it is characterized in that said normal open switch is the resetted pulling switch that is contained on the shell.