JPS60236516A - Lag switch - Google Patents

Abstract

PURPOSE:To prevent the fluctuation of a time lag owing to the evironmental variation such as the temperature change, the magnetic change, etc., by driving a control circuit which detects the working state of a load to produce an output signal when said load state is inverted and actuates the other load and at the same time actuating a timer circuit that inverts the load state after a fixed period of time. CONSTITUTION:An operation handle 1 is turned toward a contact 7a to turn on an illumination load 9. At the same time, a capacitor 16 of a detection circuit 14 is charged by a current transformer 15. Then the handle 1 is turned toward a contact 7b, the load 9 is turned off. In this case, the voltage is applied to an operation circuit Y consisting of a ventilation fan 10, a control circuit 11, a timer circuit 12 and a switching circuit 13. The charge of the capacitor 16 is discharged through the base of a transistor 23 of the circuit 13. Then the power is supplied to the circuit 12 and then to the fan 10. Thus the fan 10 works for a time lag T set by the circuit 12.

Description

Detailed Description of the Invention (Technical Field) This invention turns on and off a load A such as a lighting load using a single operation handle, and after a certain period of time after this load A is operated, another load such as a ventilation fan is turned on and off. This relates to a delay switch used in toilets and bathrooms that flips B on and off.

(Background Art) Conventionally, there are Yuzu switches that use a mainspring or an oil dashpot as a delay element. However, since this type of product is greatly affected by the surrounding environment such as temperature and magnetism, it is difficult to improve the accuracy of the delay time, and when inspecting quality, the delay time becomes the inspection time for one product. Inspection time cannot be shortened.

(Purpose of the invention: This invention was made with attention to the above circumstances,
The purpose is to provide a delay switch which can prevent delay time fluctuations due to the surrounding environment and which can inspect the quality of delay elements with long delay times in a short inspection time.

(Disclosure of the Invention This invention turns on and off a load A such as a lighting load using an operation handle, drives another load B in response to this load A, and operates a timer circuit after a certain period of time. The gist of this is to turn off B.
Hereinafter, this invention will be described as an embodiment, and FIGS.
This will be explained based on the diagram. 1 is an operating handle, and a container 5 is formed by combining a container body 2 and a lid body 3 with a metal fitting 4.
The device is attached to the exposure hole 6 of the device to reverse the C-shaped switch mechanism 7 housed in the container 5, and uses one contact 7a to turn on a lighting circuit X consisting of a power source 8 and a load A as a lighting load 9. and the other contact point 7b connects the ventilation fan 10.
An operating circuit Y is formed which includes another load B, a control circuit [1], a timer circuit, and a switching circuit port, and switches between the lighting circuit X and the operating circuit Y. 14
is a detection circuit, which detects the operating state of the lighting load 9, which is turned on and off by the operation handle 1, using a current transformer 15, and when the load 9 is lit, charges the capacitor I6 to generate an output signal. The control circuit 11 is composed of a triac lla, and operates the ventilation fan IO by a switching circuit 13 that is turned on and off according to the output signal of the detection circuit 14. As shown in FIGS. 3 and 4, the timer circuit includes an oscillation circuit 17 and a counter circuit I.
It consists of FI, output circuit 19 and reset circuit I,
The delay and time T can be set simply by varying the counter circuit 18, and the oscillation frequency can be changed by changing the values of the capacitor 21 and resistor n.
A reset signal is automatically generated when the power supply 8 is turned on. After a certain period of time after the ventilation fan 10 starts operating (
After the delay time T has elapsed), the switching circuit U is reversed to drive the control circuit 11, and the ventilation fan 10 is stopped.

The switching circuit B consists of a transistor array 24 and a thyristor δ, and is turned on and off according to the signal from the detection circuit 14, and supplies power to the control circuit 11 and the timer circuit. It is a diode bridge for

(Description of operation) When the operating handle 1 is tilted toward the contact 7a side in order to turn on the lighting load 9, the load 9 is turned on, and at the same time, the capacitor 6 of the detection circuit 14 is charged by the current transformer 15. Next, to turn off the lighting load 9, connect the operating handle 1 to contact 7.
When the load 9 is turned to the opposite side, the light of the load 9 is turned off.

However, voltage is applied to the operating circuit Y consisting of the ventilation fan 10, the control circuit 11, the timer circuit and the switching circuit 1. Then, the charge of the capacitor 16 is
The transistor 2 is discharged through the gate of the switching circuit, and the transistor is turned on, and since the base current flows through the transistor, the transistor is also turned on. Power is supplied to the timer circuit and the timer circuit, and the output 12a of the timer circuit ν becomes H, and the transistor
24 is kept on. At this time, resistance 1
．． A current flows through 28 and triggers the thyristor 6. By turning on this thyristor, the control circuit u
The triac lla is also triggered and turned on.

As a result, power is supplied to the ventilation fan 1O, and the ventilation fan 1
0 performs the opening operation for the delay time T set by the timer circuit.

Then, when the delay ends, the output 12a of the timer circuit becomes L, the transistor 24 of the switching circuit B turns off, and when the sine wave alternating current of the power supply 8 reaches zero cross, the thyristor δ and the triac lla turn off, lighting up the circuit. This is to turn off the load 9. 4 is a neon lamp that indicates the off state of the ventilation fan 10, and 4 is a Zener diode that protects the timer circuit meter.

(Effects of the Invention) As explained above, the present invention detects the operating state of the load A, which is turned on and off, using the operating handle 1, and generates an output signal when the load A is reversed. In response to this output signal, the detection circuit 14 drives the control circuit 11 that operates another load B, and also operates the timer circuit ν that inverts the load B after a certain period of time. Equipped with a switching circuit port,
It is possible to prevent fluctuations in the delay time T due to the surrounding environment such as temperature and magnetism, improving accuracy, and since it is a pulse count type timer circuit, the delay time can be reduced with less inspection time by measuring one or two pulse widths. Can perform quality inspection of long switches. Furthermore, due to the switching circuit 1, there is no power consumption at the operation circuit port in the standby state. Moreover, a small and highly accurate delay switch can be obtained.

[Brief explanation of drawings]

1 to 5 show one embodiment of the present invention, and the first
2 is a timing chart, FIG. 3 is a block circuit diagram, FIG. 4 is a timing chart, and FIG. 5 is a perspective view. 1: Operation handle, 9: Lighting load, 1o: Ventilation fan, 1
: control circuit, I2=timer circuit, t3=switching circuit, 14: detection circuit, T: delay time. Patent applicant Matsushita Electric Works Co., Ltd. Patent attorney Toshimaru Takemoto (and 2 others) Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 111 A detection circuit that detects the operating state of load A, which is turned on and off by the m operation handle, and generates an output signal when this load A is reversed, and a control that operates another load B in response to this output signal. In addition to driving the circuit,
A delay switch characterized by comprising a switching circuit that operates a timer circuit that inverts load B after a certain period of time after it operates.