Unlock instant, AI-driven research and patent intelligence for your innovation.

Switching device

A technology of switch device and switch box, which can be applied to electric switches, electronic switches, lighting devices, etc., can solve the problems of increased weight and high cost of switches

Inactive Publication Date: 2004-02-18
MATSUSHITA ELECTRIC WORKS LTD
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, this structure uses the converter to charge the capacitor, and there are problems in that the cost is high and the weight of the switch increases.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Switching device
  • Switching device
  • Switching device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Next, an embodiment of the present invention will be described using the circuit diagram of FIG. 1. FIG. Fig. 1 is a circuit diagram showing a switching device constituting the present invention. A commercial AC power supply AC and a load, for example, an electric light L installed in a corridor, are connected in series between the terminals AB of the switchgear.

[0020] In this switching device, terminals C and D of a diode bridge circuit composed of four diodes and an overvoltage absorbing element 6 for protecting the circuit of the switching device from high voltage are connected in parallel between terminals AB. Furthermore, the SCR 2, the series circuit of the resistor R2 and the transistor Q1, and the series circuit of the resistor R3 and the transistor Q2 are respectively connected in parallel to the terminals E and F of the diode bridge circuit 1.

[0021] Moreover, the collector of the transistor Q2 is connected to the base of the transistor Q1, and at the sa...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive and lightweight switching system that applies power to a load for a prescribed time by operating the switch system. SOLUTION: Charges stored in a capacitor C3 are charged in a capacitor C2 by turning on a switch 4, a transistor(TR) Q2 is conductive till the voltage across the capacitor C2 reaches a prescribed level while the capacitor C2 discharges after the operation of the switch 4. A TR Q1 is turned off for the time and a thyristor 2 is conductive and an AC power supply supplies power to an electric light L as a load for that time. That is, power is supplied to the electric light L for a prescribed time after the switch 4 is operated. Furthermore, when the switch 4 is operated again at application of power of the electric light L, the capacitor C2 is charged by charges stored in the capacitor C3 and power is supplied to the load again for a prescribed time after the operation of the switch 4.

Description

technical field [0001] The present invention relates to a switch device that energizes a load during operation and automatically cuts off the power after a specified time. Background technique [0002] In the past, the light switches located in corridors and corridors were switched on and off by human hands after they were switched on. Because they forgot to turn off the lights, a lot of electricity was wasted. Therefore, Japanese Patent Laid-Open No. Hei 2-236994 discloses a method of charging a capacitor through an inverter while operating an operation switch to turn on a lighting lamp, and discharging the capacitor to a predetermined voltage after the operation of the operation switch. The automatic switch that keeps the lighting on for the specified time until the value. [0003] However, this configuration uses an inverter to charge the capacitor, and there are problems in that the cost is high and the weight of the switch increases. Contents of the invention [000...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H03K17/28H01H13/54H03K17/292H05B37/02
CPCY02B20/42Y02B20/40
Inventor 松浦修次加藤丰
Owner MATSUSHITA ELECTRIC WORKS LTD