JPH0416587B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electric blind device, and more particularly to an electric blind device in which the blades of the blind are opened and closed by an electric motor.

[Prior Art] Recently, various motorized automatic blinds have been proposed to be installed in windows of offices, conference rooms, stores, etc. Auto blinds are becoming popular due to their convenience, and are likely to become popular for general household use in the future. However, the automatic blinds currently proposed and commercially available are equipped with a switch for commanding the blind to rise or fall, but a special switch for adjusting the angle of the blades (hereinafter referred to as slats) is not installed. is not provided. However, with conventional auto blinds, in order to raise or lower the blind, it is necessary to close the blind once, so when the raise or lower switch is operated, a pulsed voltage is applied to the motor for a predetermined period of time to raise or lower the blind. The blind is closed by rotating the winding shaft so that it is vertical, and then raised or lowered. Therefore, with conventional auto blinds, the angle can be adjusted by operating a raise or lower switch, visually checking the movement of the slats, and operating a stop switch when the optimum angle is reached. I can do it.

[Problems to be Solved by the Invention] As mentioned above, in conventional automatic blinds, the slats are first made vertical in order to raise or lower the blind.

Therefore, when adjusting the angle of the slats,
After operating the raise or lower switch, the operator must look at the angular movement of the slats and operate the stop switch when he or she determines that the angle matches the appropriate angle. If the stop switch is not operated, the blind will be raised or lowered depending on the input state of the switch, which is inconvenient in operation.

In addition, when raising or lowering the blind, operate the raise or lower switch to raise or lower the blind, and when the desired position is reached, operate the stop switch. To return to the original state, the angle of the slat must be adjusted by operating a raise or lower switch, which is extremely troublesome.

Furthermore, since the angle of the slats is manually adjusted after the blind has been raised or lowered, it is not always possible to reach the optimal angle in one go.
This operation often has to be repeated several times, which is not a desirable operation.

Therefore, this invention has been made to solve the above-mentioned problems, and provides an electric blind device that can automatically return the angle of the slats to the original angle after raising or lowering the blind. That's true.

[Means for Solving the Problems] The present invention is an electric blind device that opens and closes the blades of a blind using an electric motor,
An opening/closing drive means for opening and closing the blades by rotation of an electric motor, an angle detection means for detecting the angle of the blades, a memory means capable of storing the angle of the blades, and a means for commanding the raising/lowering and stopping of the blinds. The blind is controlled to be raised or lowered after storing the angle data detected by the angle detection means in the storage means in response to a command for raising or lowering by the raising/lowering and stop command switch and the raising/lowering and stop command switch. and by lifting/lowering and stop switch.
In response to the command to stop raising and lowering, after stopping the raising and lowering of the blind, the opening/closing driving means adjusts the blade angle so that the angle detected by the angle detection means matches the angle stored in the storage means. and a control means for adjusting and controlling.

[Function] The electric blind device according to the present invention stores the angle of the slat in response to operation of a switch that commands raising or lowering the blind,
After being raised or lowered, the angle of the slats is made to match the memorized angle, so that the angle of the slats can be easily adjusted, and the operation associated with raising or lowering the blind is extremely simple.

[Embodiment] FIG. 2 is a diagram showing an electric blind device to which an embodiment of the present invention is applied. In FIG. 2, the power cord 1 is connected to a 100V AC power source. The controller 2 includes various switches for controlling the blinds, such as a rise command switch 21 for commanding the rise of the blinds, a lower command switch 23 for commanding the lowering of the blinds, and a command for stopping the rise or fall of the blinds. a stop command switch 22 and a slat open command switch 24 for commanding the opening of the slats.
and a slat close command switch 25 for commanding the closing of the slat. The control circuit 3, which will be explained in detail later in FIG. 3, controls the operation of the blind in response to commands from various sensors (not shown in FIG. 2) and the controller 2.

The DC motor 4 rotates or stops according to commands from the control circuit 3, and adjusts the raising or lowering of the blind and the angle of the slat 13. The drive shaft of the DC motor 4 is connected via a coupling 5 to a hoisting shaft 12 . Here, the coupling ring 5 prevents vibration of the DC motor 4 and also prevents the center of the drive shaft of the DC motor 4 from shifting from the center of the winding shaft 12, and is made of, for example, anti-vibration rubber. The winding shaft 12 has a slat 1
A winding mechanism 16 for winding up the lifting tape 10 that raises and lowers the slats 13, and an angle adjustment mechanism 17 for adjusting the angle of the slats 13, which will be explained in detail later in FIG. 3, are attached. The lifting units 6 and 8 incorporate the above-mentioned winding mechanism 16 and angle adjustment mechanism 17, and the lifting unit 7 incorporates the angle adjustment mechanism 1.
Built-in only 7. One end of the lifting tape 10 is fixed to a bottom rail 14 attached to the lowest part of the blind through a through hole provided in the slat 13, and the other end is fixed to a winding mechanism built in the lifting units 6 and 8. It is fixed at 16. When the lifting tape 10 is wound up by the winding mechanism 16 as the motor 4 rotates, the bottom rail 14 rises, and the slats 13 rise one after another. When the DC motor 4 rotates in the reverse direction, the lifting tape 10 is fed out from the winding mechanism 16, and the bottom rail 14 is lowered.

FIG. 3 is a diagram for explaining the angle adjustment mechanism shown in FIG. 2. Next, the angle adjustment mechanism will be explained with reference to FIG.

A rotating drum 171 is attached to the winding shaft 12. The rotating drum 171 may be formed integrally with the winding shaft 12, or may be formed separately. The rotary drum 171 includes a ladder winding drum 1.
72 is fitted. When the rotating drum 171 rotates, a frictional force is generated between the outer circumferential surface of the rotating drum 171 and the inner circumferential surface of the ladder winding drum 172.
Rotates to follow. Therefore, the ladder cords 11a, 1 fixed to the ladder winding drum 172
One side of 1b is wound up and the other side is rewound by the rotation of the rudder winding drum 172. When the ladder cord 11a or 11b is wound up, the angle of the slat 13 changes.

A projection 173 is provided on the ladder take-up drum 172, and a stopper 174 is provided adjacent to the ladder take-up drum 172. The stopper 174 is provided at a position where it comes into contact with the protrusion 173 when the ladder winding drum 172 rotates and the slat 13 becomes vertical, that is, when the blind is closed. Although not shown, the stopper 174 moves the protrusion 173 when the slat rotates half a turn in the opposite direction and becomes vertical.
It is also provided at a position where it comes into contact with. Therefore, the rudder winding drum 172 can rotate between the two stops and stops when the projection 173 abuts the stop. At this time, the rotating drum 171 idles together with the winding shaft 12.

The rudder winding drum 172 is provided with a slat angle detection disc 175, and the slat angle detection disc 175 is provided with a large number of slits 176. An angle sensor 177 is provided to sandwich the slat angle detection disk 175.
As the angle sensor 177, a photo interrupter is used, for example. The angle sensor 177 is
A pulse signal is generated in accordance with the rotation of the ladder winding drum 172. An angle is detected based on this pulse signal.

FIG. 4 is a schematic block diagram showing the electrical configuration of an embodiment of the present invention. In FIG. 4, the control circuit 3 is provided with an MPU 30. A controller 2 is connected to the MPU 30, as well as a motor drive circuit 33, a rotation sensor 34, and an angle sensor 3.
5, an abnormality sensor 36, and an upper limit sensor 37 are connected.

When the up command switch 21 or the down command switch 23 is operated, the MPU 30 makes the slat 13 vertical at one end and then raises or lowers it, and when the stop command switch 22 is operated,
Stop the lifting/lowering operation. Further, when the slat open command switch 24 or the slat close command switch 25 is operated, the MPU 30 controls the angle of the slat 13 to be changed while these switches are pressed. Therefore, in the electric blind device of this embodiment, the angle of the slat 13 can be easily adjusted.

The AC power supply voltage of 100V is stepped down by a transformer 38 and then rectified by a power supply circuit 39. For example, 5V DC power is supplied to the MPU 30, and the motor drive circuit 33 is supplied with, for example, 5V DC power.
18V DC power is supplied. Motor drive circuit 3
3 controls the operation of the DC motor 4 in response to signals from the MPU 30 instructing normal rotation, reverse rotation, braking, stopping, etc. The rotation sensor 34 detects the rotation speed of the DC motor 4. The abnormality sensor 36 detects an abnormality when the blind stops rising or lowering for some reason. The upper limit sensor 37 detects that the blind has been rolled up to its upper limit.

The MPU 30 is provided with a ROM 31 and a RAM 32. The ROM 31 stores an operating program for the MPU 30 based on a flow diagram as shown in FIG. 1, which will be explained later. The RAM 32 includes the above-mentioned rotation sensor 34, angle sensor 177, and abnormality sensor 3.
6. It stores data detected by the upper limit sensor 37.

By the way, for example, a plurality of blinds are installed on a large window, and in such a case, it is preferable to link the blinds. In this example
By connecting a transmission means for transmitting data with other blinds to the MPU, it is possible to link multiple blinds and match the degree of opening of each blind.

FIG. 1 is a flow diagram for explaining the operation of an embodiment of the present invention.

Next, the case of raising the blind will be described with reference to FIGS. 1 to 4. When raising the blind, the raising command switch 21 of the controller 2 is pressed. When the rise command switch 21 is pressed, the MPU 30 outputs a motor drive command signal to the motor drive circuit 33. This causes the DC motor 4 to rotate. In accordance with the rotation of the DC motor 4, the ladder winding drum 172 rotates, and the angle sensor 177 outputs a pulse signal. The MPU 30 counts the number of pulse signals provided by the angle sensor 177.
The rudder winding drum 172 rotates and the slat 1
3 becomes vertical, the MPU 30 stores the movement angle data detected by the angle sensor 177 in the RAM.
32. Subsequently, when the MPU 30 instructs the winding mechanism 16 to wind up the lifting tape 10, the blind is raised. When the stop command switch 22 of the controller 2 is pressed, the MPU 30 outputs a motor stop command signal to the motor drive circuit 33. As a result, the DC motor 4 stops rotating. MPU30
When a certain braking time has elapsed, the motor outputs a motor drive command signal to the motor drive circuit 33 in order to return the slat 13 to the angle before the upward movement. Then, the angle data based on the number of pulses given by the angle sensor 177 is compared with the angle data stored in the RAM 32, and when the angle data match, a motor stop command signal is output to the motor drive circuit 33. . The MPU 30 returns to the normal routine after a certain braking time has elapsed. In this way, the slat 13 assumes the angle it had before the lifting movement.

In the above embodiment, a photo interrupter and a slit are used in combination as the angle adjustment mechanism, but the invention is not limited to this, and a striped pattern is formed on a disc attached to the rudder winding drum, and the striped pattern is used as the angle adjustment mechanism. Detection may be performed by a means for detecting intensity, or a combination of magnetism and a Hall sensor may be used.

[Effects of the Invention] As described above, according to the present invention, in response to the operation of the switch that commands the raising or lowering of the blind, the angle of the slat is memorized, and the stop of raising or lowering of the blind is commanded. Since the angle of the slat is made to match the stored angle in response to the change in the blind, the angle of the slat can be easily adjusted, and operations associated with raising or lowering the blind are extremely simple.

[Brief explanation of drawings]

FIG. 1 is a flow diagram for explaining the operation of an embodiment of the present invention. FIG. 2 is a diagram for explaining the configuration of an electric blind to which an embodiment of the present invention is applied. FIG. 3 is a diagram for explaining the angle adjustment mechanism shown in FIG. 2. FIG. 4 is a schematic block diagram showing the electrical configuration of an 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, 6, 7 and 8 are lifting units, 10 is a lifting tape, 11 is a ladder cord, 12 is a hoisting shaft, 13
16 is a slat, 16 is a winding mechanism, 17 is an angle adjustment mechanism, 171 is a rotating drum, 172 is a ladder winding drum, 173 is a protrusion, 174 is a stopper, 175
is a slat angle detection disk, 176 is a slit, 1
77 is an angle sensor, 21 is a rise command switch, 2
2 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, and 31 is a
ROM, 32 is RAM, and 33 is a motor drive circuit.

Claims (1)

[Scope of Claims] 1. An electric blind device that opens and closes the blades of a blind using an electric motor, comprising: an opening/closing drive means that opens and closes the blades by rotation of the electric motor, and detecting the angle of the blades. storage means capable of storing the angle of the blade; a lift and stop command switch for instructing the blind to rise, fall and stop; Accordingly, after storing the angle data detected by the angle detecting means in the storage means, the blind is controlled to be raised and lowered, and a stop of the raising and lowering is commanded by the raising and lowering and stop command switch. After stopping the vertical movement of the blind, the opening/closing drive means adjusts and controls the angle of the blade so that the angle detected by the angle detection means matches the angle stored in the storage means. Electric blind device equipped with control means to