JPH0594727A - Controller for electric motor - Google Patents

Abstract

PURPOSE:To prevent an erroneous operation of switches. CONSTITUTION:Pushbutton switches 41, 42, 43, 44, 44-1 and the like for elevating, stopping, lowering, opening, closing and the like are disposed in a controller 4. A limit switch 45 is provided for designating a condition of normal, limited, prohibited conditions and so on. When the limit switch 45 is located in a limit position, operation of the elevating switch 41 is stopped if an operating time does not exceed a predetermined time despite operation of, for example, the elevating switch 41.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an electric motor, and is particularly useful when used in a control device in which a switch is closed even when it is lightly touched.

[0002]

2. Description of the Related Art In commercially available electric blinds, vehicle windows, etc., operations such as raising and lowering the blinds and windows or opening and closing the blades of blinds are performed by switches such as operation buttons provided in a control device. Have control.

[0003]

In the conventional control device, since the switch is operated so that the operation is light, the switch may be operated unconsciously. Especially, in the case of the push button type, the risk is great. There were complaints that the blinds and windows were opened and closed when they were not desired due to bumps, child mischief or play. In addition, there was an accident in the summer when a child malfunctioned the switch of the cooler in the car and stopped the cooler, resulting in heat stroke.

An object of the present invention is to prevent such malfunction.

[0005]

The control device of the present invention includes:
A switch for operation and a switch for limiting the operation of the switch for operation are provided at least when the operation time of the switch for operation does not exceed a certain time.

[0006]

When at least the operating time of the operating switch does not exceed a certain period of time, the operating switch can be restricted from operating, so that inadvertent or unintentional erroneous operation can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing a schematic structure of an embodiment of the present invention when applied to an electric blind.

A blind consisting of the head box 1 and the blades 2, 2 ... Is connected to the controller 4 by a signal line 3. The controller 4 has, in this example, a raise button 41 for raising the blind,
A stop button 42 for stopping, a lowering button 43 for lowering, and an open button 44 for opening and closing the blade.
And a close button 44-1 and a limit switch 45 for limiting the function of operating the above buttons. In this example, the limit switch 45 is normally
The state of restrictions, prohibitions, etc. is specified. When the limit switch 45 is placed in the limit position, it is possible to prevent the operation switch from operating unless the operation switch, for example, the up button 41 is pressed for a certain time. Further, in the prohibited state, the operation of the operating switch can be stopped regardless of the operating time of the operating switch.

FIG. 2 is a block diagram of a control device for an electric blind which is an embodiment of the present invention. The microcomputer unit 11 is connected to the controller 4, the motor and drive unit 12, the height detection unit 13, and the power supply unit 14. The height detecting unit 13 detects the height of the blind, and when the blind reaches the upper limit, operates the upper limit switch or detects the height at which the blind is descending.

FIG. 3 is a flow chart for explaining the operation of the above embodiment. Microcomputer section 11
With the restriction switch 45, conditions for input processing such as normal, restriction, and prohibition are set.

In step S101, it is determined whether or not there is a signal from the controller 4. If not, return to the standby state. If there is a signal, the process proceeds to step S102, and it is determined whether the signal is a control signal. If it is a control signal, the process proceeds to step S103, and it is determined whether or not the limit switch 45 designates normal. If the limit switch 45 is normal, step S1
In step S105, necessary control is performed to return to the standby state.

If the limit switch 45 is not normal, the process proceeds to step S106. If the limit switch 45 specifies the limit, the process proceeds to step S107. Then, it is determined whether or not the operation button has been pressed for, for example, 1 second or more. If it is less than 1 second, it returns to the standby state. 1
If the button is pressed for more than a second, the process proceeds to the next step S108 to perform an input process, and in the next step S109, control such as raising, lowering, stopping or opening / closing is performed.

In step S106, the limit switch 4
If No. 5 is not restricted, it means that prohibition is designated, and therefore, the process proceeds to step S110 and the input of the operation button is ignored. In either case, when the series of processes is completed, the process returns to the standby state.

As described above, when the operation button is continuously pressed for, for example, 1 second or longer, the control is performed according to the operation button that is pressed for the first time. Therefore, unintentional operation is eliminated but intentional operation is possible. is there. Further, when the limit switch is in the prohibited position, the input of the operation button is not accepted, so that the safety level is further improved.

It is desirable that the limit switch 45 be installed in a place such as a side surface of the controller 4 which is not touched by the operator.

[0016]

As described above, according to the present invention, the processing condition of the operation button can be easily changed, so that the electric blind can be prevented from being opened and closed by mistake. It can also be applied to other devices. It is possible to prevent unintentional malfunction of a device driven by an electric motor and danger caused by mischief of a child.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an electric blind.

FIG. 2 is a block diagram of a control device for an electric blind.

FIG. 3 is an example of a flowchart of the apparatus of FIGS. 1 and 2.

[Explanation of symbols]

 1 Head Box 2 Blades 3 Signal Line 4 Controller 11 Microcomputer Section 12 Motor and Drive Section 13 Height Detection Section 14 Power Supply Section

Claims (1)

[Claims] 1. A control device for an electric motor, comprising: an operating switch; and a switch for limiting the operation of the operating switch at least when the operating time of the operating switch does not exceed a certain time. ..