JPS63167879A - Electric blind device - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electric blind device, and particularly to an electric blind device that uses an electric motor to raise and lower a blind.

[Prior Art and Problems to be Solved by the Invention] Recently, motorized blinds have become popular mainly for commercial use such as buildings. However, the weight is 2-7
Since it is necessary to raise and lower the Kg blind using a motor, there are problems in that a large motor is required and a large motor storage box (hereinafter referred to as a head box) is required. Furthermore, since the above-mentioned parts are required, there is a problem that the price is very high.

By the way, since the blinds are raised and lowered and the angle of the blades (hereinafter referred to as slats) are adjusted only a few times in a day, it is wasteful to use a large motor as mentioned above. There are also problems. Also, a large power transformer is required for the large motor.

Although it is thought that the above-mentioned problems can be solved by using a small electric motor, it is desirable that the small motor is not used continuously under overload.

Therefore, the main object of the present invention is to provide an electric blind device that solves the above-mentioned problems by using a small electric motor and prevents continuous use of the electric motor and power transformer.

[Means for Solving the Problems] The present invention is an electric blind device that raises and lowers a blind using an electric motor, and includes an elevator command switch for commanding the raising or lowering of the blind, and a command switch for commanding the lfi of the blind. a detection means for detecting the number of rotations of the electric motor; and a rotational drive means for rotating the electric motor in response to a command from the opening and closing command switch or the opening and closing command switch; a timing means for timing a predetermined time from that point in response to the detection of the start of rotation of the electric motor;
The electric motor is configured to include a control means for controlling the rotation drive means to stop the rotation of the electric motor in response to a predetermined time being counted by the time measurement means.

[Operation 1] In this invention, a small motor and a small power supply lance can be used to raise and lower the blind, so the shape of the head box can be made smaller and the cost can be reduced. Furthermore, since the motor is configured to stop rotating when a predetermined time fL'I has elapsed since the electric motor started rotating,
The electric motor will not overheat.

[Embodiment] FIG. 1 is a diagram showing an electric blind device to which an embodiment of the present invention is applied. In FIG.
is connected to the AC power supply of i oov.

Control [I-La 2 is for various switches for controlling the blinds, such as raising the blinds.

It includes a switch for commanding stop and lowering, and a switch for commanding opening and closing of the slats. The control circuit 3, which will be explained in detail later in FIG. 2, is for controlling the operation of the blind in response to commands from various sensors (not shown in FIG. 1) and the controller 2.

The small DC motor 4 rotates or stops according to commands from the control circuit 3. A drive shaft of the DC motor 4 is connected to a hoisting shaft 12 via a coupling 5. Winding shaft 12
has a 5-winding drum 16 for winding the lifting tape 10.
and a ladder drum 17 for winding the ladder cord 11. The storage units 6, 7 and 8 house the above-mentioned drum and various sensors described later. Here, the lifting tape 10 is used to lift the bottom rail 14 provided at the lowest part of the blind, thereby lifting the blind, and the ladder cord 11 is used to adjust the angle of the slat 13. It is something. Control circuit 3. DC motor 4. W descending 1 knits 6 and 8 are connected by a wiring cord 9. The head box 15 is connected to the control circuit 3 described above. It is used to house a set of DC motor 4 and mechanical parts for raising/lowering and opening/closing the blind, and is fixed to the upper wall surface of the window using a mounting bracket.

FIG. 2 is a schematic block diagram showing the electrical configuration of an embodiment of the present invention. In FIG. 2, the control circuit 3 has M
A controller 2, a motor drive circuit 31, a rotation sensor 32, an angle sensor 33, an abnormality sensor 34, and an upper limit sensor 35 are connected to the MPU 30.

The controller 2 has a rise command switch 21 for commanding the raising of the blind, a lower command switch 23 for commanding the lowering of the blind, a stop command switch 22 for commanding the stop of raising or lowering the blind, and opening of the slats 13. Slat opening command switch 2 for commanding
4 and slat close command switches 6 to 25 for commanding the closing of the slat 13. 100V AC power supply voltage is transformer 3
6, and then rectified by the power supply circuit 37. The MPU 30 is supplied with 5V DC power, and the motor drive circuit 31 is supplied with 18V DC power. As the transformer 36, a small one can be used since the motor 4 is a small DC motor. The motor drive circuit 31 receives signals from the MPU 30 instructing normal rotation, reverse rotation, braking, stopping, etc., and controls the operation of the DC motor 4.

The rotation sensor 32 detects the number of rotations of the DC motor 4. The angle sensor 33 is for detecting the angle of the slat 13. The abnormality sensor 34 detects an abnormality when the blind does not rise or fall for some reason. When the abnormality sensor 34 detects an abnormality, the MPU 30 instructs the motor drive circuit 31 to
A command is given to stop the rotation of the DC motor 4. Upper limit sensor 35
is used to detect that the blind has been rolled up to its maximum limit. When the upper limit sensor 35 detects that the blind is rolled up, the MPU 30 instructs the motor drive circuit 31 to stop the rotation of the DC motor 4.

FIG. 3 is a flow diagram for explaining the operation of one embodiment of the present invention. Next, referring to Figures 1 to 3,
The operation of one embodiment of this invention will be explained.

The MPU 30 operates when there is a key input from the controller 2, that is, when the blind is raised or lowered.

or when commanded to open or open the slats;
When the motor rotates for three minutes or more, it is determined whether, for example, five minutes have not elapsed since the last keystroke. This is to cool down the motor for a predetermined period of time after driving, since the motor will overheat if it is driven continuously. This 5-minute time measurement is executed by MPIJ30 on software. Even if the controller 2 key is pressed manually during these 5 minutes, the MPU 30
does not accept key personnel.

If 5 minutes have passed since the previous key input, the key input from the controller 2 is accepted and the corresponding control code is output to the motor drive circuit 31.

When the DC motor 4 starts rotating by the motor drive circuit 31, the MPU 30 starts measuring time, for example, three minutes. Here, when the motor is used continuously for 3 minutes, the MPU 30 continuously measures time during that period, and when the motor is used intermittently, the MPU 30 accumulates only the usage time and measures the time for 3 minutes. time. and,
For example, if three minutes have elapsed, the output of the control code to the motor drive circuit 31 is forcibly interrupted. As a result, the DC motor 4 stops rotating.゛The reason why the output of the control code is interrupted is because if the DC motor 4 is rotated continuously or intermittently for more than 3 minutes, the DC motor 4 will be overloaded and overheated. It is.

[Effects of the Invention] As described above, according to the present invention, continuous use of the motor is prevented by stopping the rotation when a predetermined time has elapsed since the motor started rotating. The motor may be small or can only be used for short periods of time. Therefore, a small power transformer can be used, reducing the cost of the electric blind device, and reducing the size of the head box.
The effect of reducing motor noise can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an electric blind device to which an embodiment of the present invention is applied. FIG. 2 is a schematic block diagram showing the electrical configuration of an embodiment of the present invention. FIG. 3 is a flow diagram for explaining the operation of one embodiment of the present invention. In the figure, 1 is a power cord, 2 is a controller, 3 is a control circuit, 4 is a DC motor, 5 is a coupling, 6.7
6 and 8 are lifting units, 9 is a wiring cord, 10 is a lifting tape, 11 is a ladder cord, 12 is a winding shaft, 13 is a slat, 14 is a bottom rail, 15 is a head box, 21 is a lift command switch, 22 is a stop command switch, 23 is a lower command switch, 24 is a slat open command switch, 25 is a slat close command switch, 30 is an MPU, 31 is a motor drive circuit, 32 is a rotation sensor, 3
3 is an angle sensor, 34 is an abnormality sensor, and 35 is an upper limit sensor.

Claims (1)

[Scope of Claims] An electric blind device for raising and lowering a blind using an electric motor, comprising: a raising/lowering command switch for commanding raising or lowering of the blind; and an opening/closing command for commanding opening/closing of the blind. a switch; a detection means for detecting the rotational speed of the electric motor; a rotational drive means for rotationally driving the electric motor in response to a command from the lift command switch or the opening/closing command switch; a clock means for counting a predetermined time from that point in time in response to the detection of the start of rotation of the electric motor; An electric blind device comprising: a control means for controlling rotation of the electric motor to stop.