JPS6372013A - switch - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a switch for turning on and off a power source.

BACKGROUND OF THE INVENTION A switch for turning on and off a power source is used, for example, in a control unit of an electronically controlled washing machine.

This control section includes a push button switch 2 as shown in FIG.
A control circuit 4, a load 6 such as a motor or a solenoid valve, and a drive circuit 6 for driving the load 5 are connected to the power source 1 via the power source 1. The control circuit 4 controls the load 6 by outputting a signal to the drive circuit 6 based on the signal from the input section 3 that inputs information. In the control section configured as described above, the user first turns on the push button 2 as a power switch to turn on the power source 1 to the control circuit 4. Load 6. The voltage is applied to the drive circuit 6, a command is issued to the control circuit 4 by input from the input section 3, and the control circuit 4 controls the load 5 via the drive circuit 6, thereby performing operation.

Problems to be Solved by the Invention However, if the push button switch 2 is used as the power switch of the control unit as in the past, the washing machine will finish all the prescribed operations and the drive circuit 6 will cut off the power supply to the load 6. Even after doing this, push button switch 2 remains on, so
There is a problem in that power continues to be wasted in the control circuit 4 until the user turns off the push button switch 2. Note that although the control unit has been described in the case of a washing machine, similar problems also exist in devices that perform electronic control.

The present invention solves these problems and aims to provide a switch that does not wastefully supply power to a control circuit after the device has finished operating.

Means for Solving the Problems In order to solve the above problems, the switch of the present invention includes an operating section that, when pressed, maintains the contact from an off state to an on state, and a signal that returns the operating section to the off state. The release device is housed adjacently within the switch case.

Function: With this configuration, even if the contact is turned on by the operating section, the release device returns the operating section to the off state in response to a signal generated after the end of operation, thereby eliminating wasteful power consumption.

Embodiment A switch according to an embodiment of the present invention is shown in FIGS. 1 and 2.
This will be explained using figures.

In the figure, when the button is pressed, the lever 9 is caught on the cam 8, and the push button 7 is kept in the pressed state. In this state, the contact A10 and the contact B11 are in the N state, and power is applied to the control section. At this time, the contact A10 is being pushed by the movable piece. The movable piece 12 maintains the contact pressure between the contact point A10 and the contact point B11 by a coil spring 13.

The magnet 14, which is a release device, moves the lever 16 downward in response to a signal from the control unit. At this time, the heart cam 8 rotates as shown by the arrow around the fulcrum 16, releasing the lever 9 from being caught, and the push button 7 is pressed against the coil spring 1.
The contact A10 and the contact B11 are turned off, and the power to the control section is cut off. In this way, the push button 7 operates the magnet 14 in response to a signal at a certain fixed time after the end of the operation of the device, and returns the push button 7 to its return state. Further, in order to perform this return, in addition to the magnet 14, a bimetal, a shape memory alloy, or the like, in which the lever 15 is operated by an electric signal, may be used.

Moreover, if the signal for returning the push button 7 is an abnormality signal of the equipment, the power supply to the control section can be reliably canceled in the event of an abnormality, and malfunction of the equipment due to an abnormality can be prevented.

Further, since the operating member and the magnet 14 serving as the release device are housed within the switch case 18 and attached adjacent to each other, the switch case body can be downsized and the range of mounting locations for the switch can be expanded.

Effects of the Invention As described above, according to the present invention, even if the operation is performed for a predetermined period of time with the power switch turned on, the release device is activated by a signal from the control unit after the operation ends, and the power switch is turned off. Therefore, there is no wasted power consumption. Also, since the control unit returns to its initial state, the next time it operates,
The operation section starts reliably from the off state and is easy to operate. Furthermore, since the operating section and the release device are housed adjacently within the switch case, a compact switch can be provided and manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view of a switch according to an embodiment of the present invention, FIG. 2 is a sectional view of the main part thereof, and FIG. 3 is a block diagram showing a control section of an electronically controlled pickling machine. End...Push button, 10.11...Contact point, 14...Macuneno l-0 Agent's name Patent attorney Toshi Nakao and 1 other person m2
Mouth figure 3

Claims (1)

[Claims] A switch that is housed in a switch case, with an operating part that turns a contact from off to on when pressed and maintains that state, and a release device that turns the operating part off in response to a signal, adjacent to each other.