JPS6178096A - Delay switch circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an electronic delay switch circuit having a night light function.

[Background technology]

Conventionally, there is a type of electronic delay switch circuit shown in Fig. 2, which is an AC fI! source fi+ and lighting load (2
) was connected to both ends of the series circuit with an automatic delay turn-off circuit (3). This automatic delay light-off circuit (3) will be schematically explained. As shown in the figure, the switch (
4), the series circuit of the primary winding of the current transformer (CT), and the triac (TR2) connect the AC 122 source il+ and the load (2
) is connected to both ends of the series circuit.

Here, if you press the switch (4), the current transformer i1 (CT)
Current flows through the primary side of the circuit, generating an AC voltage on the secondary side. This AC voltage is rectified by a diode bridge (DB), stabilized by a Zener diode (ZDI), and then connected to a capacitor (CI). ) K is charged. At this time, FET (Q6
) becomes reverse biased and turns off.

On the other hand, the voltage rectified by the diode bridge (DB2) is connected to 5CR (TD2) and transistors (Q, ) to (
Q3) Since K is applied, the transistor (Q2) turns on, voltage is applied to the base of the transistor (Q3), and the transistor (Q3) turns on.

Therefore, a tricam current flows to the gate of SCR (TD2), and a triac current also flows to the triac (TR4) via the diode bridge (DB), turning on the triac (TR,), and lighting load (2). lights up.Here, the charge charged in the capacitor (CI) K is gradually discharged via the variable resistor (VRz), and the capacitor (C
When the voltage of 1) becomes below a certain level, the current of FET (Qs) gradually flows. When the voltage drop due to resistor (R1) K exceeds the threshold of transistor (Q,),
Q, ) is turned on, and the transistor (Q, ) is also turned on, and the charge on the capacitor +j (C3) is rapidly discharged.

Then, the FET (Qs) turns on and the transistor (Q,
) decreases, and the base voltage of the transistor (Q, S C
R (TDt) and triac (TRg) are turned off. Here, the capacitor (C1) and the variable resistor (VR) constitute a delay circuit that determines the delay time. In addition, the circuit composed of the transistor (q), the diode (ZD2) and the capacitor (C2) is SCR (TDI
) is a circuit that prevents it from turning on inadvertently. However, in the above-mentioned circuit, the operation of turning off the light after a certain period of time can be used in many applications, such as ventilation fans in hand washrooms, etc., but it has the drawback that its use as a lighting equipment is limited, and it also has the drawback of being used as a night light. It could not be used as such.

[Purpose of the invention]

The present invention has been made in view of the above-mentioned problems with VC, and its purpose is to provide a delay switch circuit that can be used for a variety of purposes and can be used even when a night light is on.

[Disclosure of the invention]

Figure 1 is a diagram showing the circuit configuration of an embodiment of the present invention. ◇In the non-embodiment, the circuit consists of an automatic delay turn-off circuit (3) similar to the conventional example, with two contacts C3a) (5b) and two contacts C3a) (5b). A light/dark switching circuit (7) consisting of a wave push button switch (6) and a dimming circuit (6), both of which have a neutral point in an open state, is added. The contact terminal of the -/iL moving pushbutton switch (6) is connected to one end of the series circuit of the AC power supply and the lighting load (2), and the contact of one wave pushbutton switch (5) is
5a) is connected to the other end, and the other contact (5b) is connected to the other end via the dimming circuit (6). The dimmer circuit (6) has a current limiting coil (L), a triac (TR,), and a triac (TR□).
, ') and the volume (VR,) that adjusts the firing angle.
and a capacitor (C1) that determines the firing angle with a volume (VR, ), and in this example, the firing angle of the triac (TRI) is set to 10% of that when the lighting load (2) is fully lit. The light should turn on. Note that the dimming circuit (6) is not limited to the above-mentioned circuit.

The operation of this embodiment having the above-described configuration is as follows. first,
When the i-motion pushbutton switch (6) is switched to the contact (5a) side, the lighting load (2) lights up 100%, and when switched to the contact (5b) side, the lighting load (2) lights up 10%. Here, contact (5a) (5
b) Both have a wave push button switch (6) at the open neutral point.
When the switch (4) of the automatic delayed light-off circuit (3) is turned on, the circuit turns on 100% and turns off the light for a certain period of time, similar to the conventional example. In addition, wave push button switch (5)
9] to the contact (5b) side and press the switch (4).The automatic delay turns off 5M times while the switch is pressed! ! 100% lighting for a certain period of time with a delay time of 31, then 10% lighting
It lights up.

〔Effect of the invention〕

1. The present invention includes a second switch having two contacts and a neutral point in which both contacts are open, and a dimming circuit that dims the lighting load.1. This is because a light/dark switching circuit is provided, which shorts both ends of the series circuit when one contact of the switch is switched, and connects a dimming circuit to both ends of the series circuit when the other contact is switched. , 100% continuous lighting and dimming continuous lighting are possible, so it can be used as ordinary lighting or as a night light. In addition, in combination with an automatic delay turn-off circuit, it can be used as a night light to turn on continuously under normal dimming conditions, and when 100% lighting is required at one time (for example, when a small object has been dropped and thrown).
It has the effect of realizing various uses such as 100% lighting by pressing the automatic delay turn-off circuit.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of an embodiment of the present invention, and FIG. 2 is a circuit configuration diagram of a conventional example. ill is AC power supply, (2) is load, (3) is self-contained, 11111 compliance, 36 lights, 7 circuits, (
6) is a wave push button switch, (6) is a dimming circuit, and (7) is a bright/dark switching circuit.

Claims (1)

[Claims] (1) A switch is provided at both ends of the series circuit between the power source and the lighting load, and the lighting load is turned on when the switch is closed, and the lighting load is turned off after a certain time delay after the first switch is opened. A delay switch circuit connected to an automatic delay extinguishing circuit includes a second switch having two contacts and a neutral point in which both of the two contacts are open, and a dimming circuit that dims a lighting load; A light/dark switching circuit is provided, which shorts both ends of the series circuit when the second switch is switched to one contact, and connects a dimming circuit to both ends of the series circuit when the second switch is switched to the other contact. delay switch circuit.