JPH0469716B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electric blind device, and in particular,
The present invention relates 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, since it is necessary to use a motor to raise and lower blinds weighing 2 to 7 kg, a large motor is required, and a large motor storage box (hereinafter referred to as a head box) is also required. There is a problem. 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 a lift command switch for commanding the raising or lowering of the blind, and a raising/lowering command switch for commanding the opening and closing of the blind. an opening/closing command switch for the operation, 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 elevation command switch or the opening/closing command switch, and the detection means. a first timer for measuring whether the cumulative total of continuous or intermittent operation time of the electric motor has reached a first predetermined time from the time when the start of rotation of the electric motor is detected; and a rotational drive. and a second timer for measuring whether or not a second predetermined period of time has elapsed since the command to rotate the electric motor is issued to the means, and the first timer is used to measure time. When the time reaches the first predetermined time,
When the rotational drive of the electric motor is stopped and the time measured by the second timer has not passed a second predetermined time, the electric motor rotational drive command to the rotational drive means is not accepted. It is something.

[Operation] In the present invention, a small motor and a small power transformer 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. Further, when the cumulative operating time since the electric motor starts continuous or intermittent operation reaches a first predetermined time, the rotational drive of the electric motor is stopped, and when the operating time reaches the first predetermined time and the electric motor If the second predetermined time has not elapsed since the first rotational drive command was issued, the rotational drive command to the rotational drive means is not accepted, so the 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. 1, a power cord 1 is connected to a 100V AC power source. The controller 2 includes various switches for controlling the blind, such as a switch for raising, stopping and lowering the blind, 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. The drive shaft of the DC motor 4 is connected to a hoisting shaft 12 via a coupling 5 . Lifting tape 1 is placed on the winding shaft 12.
Winding drum 16 for winding 0 and ladder cord 1
A ladder drum 17 for winding up 1 is connected. The storage units 6, 7 and 8 incorporate the above-mentioned drum and various sensors to be explained later. Here, the lifting tape 10 is for lifting the blind by lifting the bottom rail 14 provided at the lowest part of the blind, and the ladder cord 11 is for adjusting the angle of the slat 13. It is. The control circuit 3, the DC motor 4, and the lifting units 6 and 8 are connected by a wiring cord 9. The head box 15 is for housing the above-mentioned control circuit 3, the DC motor 4, and a set of mechanical parts for raising/lowering and opening/closing the blind, and is fixed to the upper wall of the window using a mounting bracket.

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

The controller 2 includes 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 stopping the raising or lowering of the blind, and a slat 13. It includes a slat opening command switch 24 for commanding the opening of the slat 13 and a slat closing command switch 25 for commanding the closing of the slat 13. The AC power supply voltage of 100V is stepped down by a transformer 36 and then rectified by a power supply circuit 37. Then, 5V DC power is supplied to the MPU 30, and the motor drive circuit 31 is supplied with 5V DC power.
18V DC power is supplied. 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 for normal rotation, reverse rotation, braking,
The operation of the DC motor 4 is controlled in response to a signal instructing a stop or the like.

The rotation sensor 32 detects the number of rotations of the DC motor 4. The angle sensor 33 is connected to the slat 13
It is used to detect the angle of The abnormality sensor 34 detects an abnormality when the blind stops rising or lowering for some reason. When the abnormality sensor 34 detects an abnormality,
The MPU 30 instructs the motor drive circuit 31 to stop the rotation of the DC motor 4. Upper limit sensor 3
5 detects that the blind has been rolled up to its upper 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, Figures 1 to 3
The operation of an embodiment of the present invention will be described with reference to the drawings.

When there is a key input from the controller 2, that is, when a command is given to raise or lower the blind, or to open or close the slats, the MPU 30 controls the MPU 30 when the motor rotates for more than 3 minutes. Determine whether the minutes have elapsed. 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 the MPU 30 on software. Even if a key input on controller 2 is performed during these 5 minutes, the MPU
30 does not accept key input.

If 5 minutes have passed since the last key input,
It accepts key input from the controller 2 and outputs the corresponding control code to the motor drive circuit 31.
When the DC motor 4 starts rotating by the motor drive circuit 31, the MPU 30 starts counting time, for example, for three minutes. here,
When the motor is used continuously for 3 minutes, the MPU 30 continuously measures the time, and when the motor is used intermittently, the MPU 30 measures the 3 minutes by accumulating only the usage time. Then, for example, when 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 here 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. be.

[Effects of the Invention] As described above, according to the present invention, the motor and power transformer can be made smaller, the cost of the electric blind device can be reduced, and the shape of the head box of the blind can also be made smaller. Since it is small, the noise generated when the motor is driven can also be reduced.

[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 one 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 and 8 are lifting units, 9 is a wiring cord, 10 is a lifting tape, and 11 is a ladder cord. , 12 is a winding shaft, 13 is a slat,
14 is the bottom rail, 15 is the head box, 2
1 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, 33 is an angle sensor, 34 is an abnormality sensor, and 35 is an upper limit sensor.

Claims (1)

[Scope of Claims] 1. An electric blind device that raises and lowers a blind using an electric motor, comprising: a lift command switch for commanding raising or lowering of the blind; and an opening/closing switch for commanding opening and closing of the blind. a command 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; and the detection means. The cumulative total of continuous or intermittent operation time of the electric motor from the time when the start of rotation of the electric motor is detected by the first predetermined
a first timer for measuring whether or not a predetermined time has elapsed;
a second timer for measuring whether or not a predetermined time has elapsed;
When the predetermined time has elapsed, the drive of the electric motor is stopped, and when the time measured by the second timer has not elapsed, the rotational drive of the rotational drive means is stopped. An electric blind device equipped with a control means that controls not to accept commands.