JPS6372014A - Equipment power 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 Industrial Application The present invention relates to a power switch for equipment used in washing machines and the like.

BACKGROUND OF THE INVENTION A power switch for turning on and off a power supply of a conventional technical appliance is used, for example, in a control unit of an electronically controlled washing machine. As shown in FIG.
The power supply 1 was connected to a control circuit 4, a load 5 such as a motor or a solenoid valve, and a drive circuit 6 for driving the load 6 through the power supply 1. An input section 3 for inputting information is connected to the control circuit 4, and based on a signal from the input section 3, the control circuit 4 outputs a signal to a drive circuit 6 to control the load 5. In the control section configured as described above, first, the user turns on the push button switch 2 as a power switch, and the power source 1 is connected 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, when the push button switch 2 is used as the power switch of the control unit as in the past, the washing machine finishes all the prescribed operations and the drive circuit 6 cuts off the power supply to the load 5. Even after doing this, push button switch 2 remains on, so
control circuit 4 until the user turns off this pushbutton switch.
However, even when an abnormality occurs, power is wasted and the power remains on, which is dangerous. 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 power switch that does not supply unnecessary power to the control circuit after the device has finished operating, and turns off the power when an abnormality occurs. shall be.

Means for Solving the Problem In order to solve this problem, the power switch of the device of the present invention has an operating part that keeps the contact in the on state when pressed, and a signal that returns the operating part to the off state. A release device is provided, and the signal is an operation end signal and an abnormality signal.

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 and cuts off the power in response to a signal generated at the end of operation or during an abnormality.

Embodiment A power switch according to an embodiment of the present invention will be explained with reference to FIGS. 1 and 2.

In the figure, reference numeral 7 denotes a push button which is an operating section, and when the button is pressed, a lever 9 is caught on the heart 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 an ON state, and power is applied to the control section. At this time, the contact A1o is pressed by the movable piece 12. 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 15 downward in response to a signal from the control section. At this time, the heart cam 8 rotates as shown by the arrow around the fulcrum 16, releasing the lever 9 from being caught, the push button 7 returns to its original state due to the coil spring 17, and the contacts A1o and B11 are turned off, and the power to the control section is turned off. I can refuse. In this way, when the push button 7 is pressed for a certain period of time after the device has finished operating, the magnet 14 is activated by a signal, and the push button 7 is activated.
This is to return to the restored state.

Further, in order to perform this return, a bimetal, a shape memory alloy, or the like, in which the lever 15 is operated by an electric signal, may be used instead of the magnet 14.

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.

Effects of the Invention As described above, according to the present invention, even if the device is operated 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 is completed or in the event of an abnormality.
Since the power switch is turned off, there is no wasted power consumption, and the system is safe because it does not continue to be energized in the event of an abnormality. Furthermore, since the operation section has returned to its initial state, the operation section will surely start from the OFF state in the next operation, making it easy to perform the operation.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway sectional view of a power switch according to an embodiment of the present invention, Fig. 2 is a VjT side view of the main part, and Fig. 3 is a block diagram showing the control section of an electronically controlled machine. be. 7...Push button, 10.11...Contact, 141
181. ．． 7 Gnenot. Name of agent: Patent attorney Toshio Nakao and one other persontj
Sl diagram
7---J Koshigotan IQ11---1 or 71 Figure 2 Figure 3

Claims (1)

[Claims] A power switch for equipment, comprising an operating part that holds a contact in an on state when pressed, and a release device that returns the operating part to an off state by a signal, the signal being a signal after the end of operation and a signal in the event of an abnormality.