JPH073148B2 - Electric blind device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blind device, and more particularly to an electric blind device capable of unifying the blade angles of a plurality of blinds by a simple operation.

[Problems to be Solved by Prior Art and Invention] In the electric blinds currently proposed and commercially available, a time control method is used as a method for simultaneously opening and closing blades (hereinafter referred to as slats) of a plurality of blinds. It has been adopted and the electric motor of each blind is rotated for a certain period of time.

However, the rotation speeds of the electric motors are not always the same, and if the electric motors are operated simultaneously from the closed state of the slats and stopped after a certain period of time, the opening and closing degrees of the slats become uneven. there were. In particular,
When the weight of the blind is different, it is more difficult to uniformly control the slat angle because the load of the electric motor is different.

Therefore, a main object of the present invention is to provide an electric blind device that can unify the angles of the slats of a plurality of electric blinds by an easy operation.

[Means for Solving Problems] The present invention relates to opening / closing command means for collectively commanding opening / closing of blades of a plurality of electric blinds, and a plurality of electric blinds in advance in response to commands from the opening / closing command means. And a pulse signal generating means for continuously outputting a predetermined pulse signal,
The control means of each electric blind is configured to rotate the electric motor by a certain angle and open and close the blades by a specified angle each time the pulse signal generated by the pulse signal generating means is given.

[Operation] Since the electric blind device according to the present invention controls the rotation of the electric motor so as to open and close the slat angle by a constant angle for each pulse signal to be output in accordance with the command of the opening / closing command means, Even if the rotation speed of the electric motor is different and the weight of the blinds is different, the slat angles of all the blinds can be unified and the conventional drawbacks can be solved.

[Embodiment] FIG. 2 is a view showing an outline of an electric blind to which an embodiment of the present invention is applied, and FIG. 3 is a view showing a main part of a blind winding mechanism.

First, the external structure of an embodiment of the present invention will be described with reference to FIGS. 2 and 3. The power cord 1 and the controller 2 are connected to the control unit 3. Controller 2
The raising switch 21 for commanding the raising of the blind
A stop switch 22 for instructing a stop, a descent switch 23 for instructing a descent, an open switch 24 for instructing to open the slat 13, and a closing switch for giving a command for closing the slat 13. And 25 are provided. The control unit 3 includes a microcomputer, a power supply unit, and the like. A geared motor 4 including an electric motor and a reduction gear is connected to the control unit 3.

The rotation shaft of the geared motor 4 is connected to the lifting shaft 12 via the coupling 5. On the lifting shaft 12,
The lifting units 6, 7 and 8 are connected. Sensors, fault switches (not shown), and upper limit switch 16 built in these lifting units 6, 7 and 8 are connected to the control unit 3 by a wiring member 9. The wiring material 9 also includes wiring for the geared motor 4 and wiring for the controller 2. The lifting units 6 and 8 include a winding drum 37 and a ladder drum 39, and the lifting unit 7 includes only the ladder drum 39.

One end of a lifting tape (which may be in the form of a string) is fixed to the winding drum 37. The other end of the lifting tape 10 penetrates the holes 13a of the plurality of slats 13 and is fixed to the bottom rail 14. Then, the winding drum 37 winds or unwinds the lifting tape 10 in accordance with the rotation of the lifting shaft 12, and raises and lowers the slats 13 and the bottom rail 14. Also, the ladder drum 39
, One end of the ladder cord 11 is fixed, the ladder cord
The other end of 11 is fixed to the bottom rail 14.

This ladder cord 11 is, for example, 50 mm, 25 mm of slats 13.
Alternatively, the two ladder cords 11a, 11b are made up of a pair of two cords 11a, 11b with an interval corresponding to a width of 15 mm.
11b are spaced at intervals corresponding to the pitch p of the slats 13, and are connected by, for example, ladder-like two horizontal strings 11c and 11d. The slats 13 are inserted and held in a square formed by the ladder cords 11a and 11b and the transverse cords 11c and 11d. Then, the ladder drum 39 rotates with the rotation of the elevating shaft 12, and controls the opening degree of the slat 13. The bottom rail 14 functions as a weight when descending the blind and as a weight that prevents the blind from swinging due to wind or the like after the descent.

The control unit 3, the geared motor 4, and the lifting units 6, 7 and 8 are covered by a head box 15 forming an outer box. At the bottom of this head box 15, the upper limit switch
16 is provided, and this upper limit switch 16 is pressed by the slats 13 to operate when the blind is wound up, and detects the upper limit position. The upper limit switch 16
May be configured by an electronic switch such as an optical sensor.

FIG. 4 is a schematic block diagram of an electric frind to which an embodiment of the present invention is applied. Next, referring to FIG.
The electrical configuration of the electric blind to which the embodiment of the present invention is applied will be described.

AC power is input to the power transformer 31 via the power cord 1. The power transformer 31 steps down the input AC power and applies a low voltage to the stabilized power supply 32 to generate the power required for the controller 3 and the geared motor 4. A motor drive circuit 33 is connected to a microcomputer (hereinafter, referred to as MPU) 34, and the geared motor 4 is normally or reversely rotated and a brake mode is controlled according to a command from the MPU 34.

Here, the brake mode is to short-circuit the input terminals of the geared motor 4 via the motor drive circuit 33. By short-circuiting between the input terminals of the geared motor 4 in this way, the geared motor 4 is braked. be able to. That is, when the rotational force is mechanically applied to the geared motor 4 such as inertia caused by the descent of the blind or when the blind is strongly pulled in the direction in which the blind is artificially lowered, the geared motor 4 operates according to the principle of the DC generator. Will generate a back electromotive force. Therefore, by short-circuiting between the input terminals, a current for causing this rotation to be blocked, that is, a reverse rotation, flows, and the geared motor 4 is stopped. A voltage detection circuit 35 is connected to the MPU 34. The voltage detection circuit 35 detects the voltage of the power supply Vcc supplied to the control unit 3. That is, the voltage detection circuit 35 monitors the voltage supplied from the power cord 1 on the low voltage side via the transformer 31.

The obstacle switch 36 is built in the elevating unit 6, and as an example of a trouble, when the operation of descending is stopped by hitting an obstacle or the like while the blind is descending, the geared motor 4 moves in the descending direction. If the rotation is continued, the lifting tape 10 will slacken.
However, if the blind is raised next time, the lifting tape 10 cannot be wound up, resulting in a serious failure.

In order to prevent this, the slack of the lifting tape 10 is detected by a mechanical switch or an optical or magnetic sensor as in the present invention as a conventional technique, and the detection output is input to the MPU 34 to drive the motor drive circuit 33. The geared motor 4 is stopped via this. This sets the motor drive circuit 33 to the brake mode. Also, the MPU 34 reverses the geared motor 4 for an arbitrary time after the gear motor 4 is stopped, winds up the blind, and lifts the lifting tape 10
After eliminating the slack, the geared motor 4 is stopped.

The winding drum 37 winds or unwinds the lifting tape 10 in accordance with the rotation of the geared motor 4 to raise and lower the blind.
Includes 10 guides 371,372. A slit 373 is formed around the guide 371, for example. A disc may be attached to the other part of the elevating shaft 12 separately from the winding drum 37, and a slit may be formed in the disc to rotate the elevating shaft 12, the geared motor 4, or the geared motor 4. Even if the rotation of the motor shaft is detected, the same effect can be obtained, so that the mounting position and method are not limited.

A photo interrupter 38 is provided in association with the guide 371 of the winding drum 37. This photo interrupter 38
Optically detects disconnection of the slit 373 formed in the guide 372 of the winding drum 37, converts the rotation of the elevating shaft 12 into an electric signal, and inputs the electric signal to the MPU 34. That is, the MPU 34 can know the amount of lifting or lowering of the lifting tape 10 by the rotation of the winding drum 37 by an electric signal.
As described above, one end of the ladder cord 11 is fixed to the ladder drum 39, and the rotation of the ladder drum 39 changes the angle of the slats 13 to change the incident amount of outside light to achieve an appropriate brightness in the room. Or turn off external light.

The ladder drum 39 is fitted in a frictional state via a drum shaft 40 that penetrates the lifting shaft 12. The elevating shaft 12 and the drum shaft 40 rotate integrally (synchronously), but when the ladder drum 39 rotates almost half a turn, the rotation of the ladder drum 39 is stopped by a protrusion (not shown) provided by the head box 15 or the like. Then, it slips on the drum shaft 40 and runs idle. Further, when the elevating shaft 12 is reversed, the ladder drum 39 is also reversed in the same manner, but similarly to the above description, it hits a protrusion such as the head box 15 and spins idle. When the ladder drum 39 rotates about half a turn, the slat 13 rotates clockwise and the angle of the slat 13 changes. That is, the slat 13 changes from a state in which it is slanted and closed on the indoor side to a horizontal state where it is opened and is slanted and closed to the outdoor side. When the elevating shaft 12 rotates in the direction opposite to that described above, the angle of the slats 13 changes counterclockwise. That is, the state in which the outdoor side is tilted and closed is changed to the horizontal state and the state is opened, and the indoor side is tilted and closed.

A slit 391 for detecting the rotation of the ladder drum 39 is formed at one end of the ladder drum 39. The slit 391 is formed at an angle corresponding to almost half rotation of the ladder drum 39, and a photo interrupter 41 is provided to detect the position of the slit 391. The photo interrupter 41 detects the position of the slit 391, converts it into an electric signal, and gives it to the MPU 34. The MPU 34 can know the angle of the ladder drum 39, that is, the angle of the slat 13 according to this electric signal. The receiving circuit 42 receives a signal from the interlocking control device 70 described later and gives it to the MPU 34, and is connected to the signal line 60.

The switches 21 to 25, the clock generation circuit 43, and the reset circuit 44 of the controller 2 are connected to the MPU 34.

FIG. 5 is a diagram showing an electric blind device according to an embodiment of the present invention, FIG. 6 is a timing chart in the embodiment of the present invention, and FIG. 1 is a specific example of the embodiment of the present invention. It is a flow figure for explaining operation.

Next, with reference to FIG. 1 to FIG. 6, a specific configuration and operation of one embodiment of the present invention will be described.

As shown in FIG. 5, each electric blind 50 is connected to the interlocking control device 70 via a signal line 60. Each electric blind
When operating 50, the controller 2 provided in each electric blind 50 is operated, but when it is desired to operate all blinds at the same time, the interlocking control device 70 is operated.
The interlocking control device 70 includes a raising switch 71 for instructing the raising of the blind, a stop switch 72 for instructing the stop, a lowering switch 73 for instructing the lowering of the blind, an open switch 74 for instructing the opening of the slats, and a closing switch for instructing the closing of the slats. switch
75 is provided. When any of the switches 71 to 75 is operated, the interlocking control device 70 outputs a pulse signal for synchronization as shown in FIG. Before the sync pulse signal, a type signal indicating the type of switch such as rising, falling, slat open or slat close is output, and after the sync pulse signal, a stop signal for instructing stop is output.

The MPU 34 operates according to each input signal when any of the switches 21 to 25 of the controller 2 is operated. For example, when the open switch 24 or the close switch 25 is operated, the MPU 34 gives an intermittent signal to the motor drive circuit 33 in order to change the opening / closing degree of the slat 13. Accordingly, the motor drive circuit 33 intermittently rotates the geared motor 4. When the geared motor 4 rotates intermittently, this rotational force intermittently rotates the elevating shaft 12 via the coupling 5. As the lifting shaft 12 rotates, the drum shaft 40
The winding drum 37 and the ladder drum 39 are rotated via. Due to the intermittent rotation, as a result, the ladder drum 39 is slowly rotated and one side of the ladder cord 11, for example, the side of the ladder cord 11b is wound up, and the paired ladder cords 11a are lowered. That is, when the ladder drum 39 rotates in the direction of the arrow shown in FIG. 3, the ladder cord 11b side goes up and the 11a side goes down. Thereby, the slats 13 rotate in the direction of the arrow. The ladder drum 39 rotates, the slit 391 provided in the ladder drum 39 interrupts the output signal of the photo interrupter 41, and a pulse signal is given to the MPU 34. M
The PU 34 sequentially counts pulse signals and recognizes the slat angle. The count of the number of pulses is positive when the geared motor 4 rotates in the forward direction and negative when the geared motor 4 rotates in the reverse direction, so that the MPU 34 can accurately recognize the slat angle in any operation.

Next, the operation when changing the slat angle by operating the interlocking control device 70 will be described. For example, when the slat closing switch 75 is operated, the interlocking control device 70
First, a signal indicating that the slat is closed is output, and then a synchronization pulse is output at a predetermined time interval. The output signal is transmitted to each interlocking blind 50 via the signal line 60. The MPU 34 of each blind 50 confirms that the slat 13 is rotated in the closing direction in response to receiving the signal indicating the closing of the slat via the receiving circuit 42, and waits until the synchronization pulse signal is transmitted. Given the first sync pulse, the MPU34 responds to the falling edge of that signal by
Giving a voltage of V _M bolts from the motor driving circuit 33 to the geared motor 4, to start rotation of the geared motor 4, monitors the input of the pulse signal from the photo-interrupter 41. According to the rotation of the geared motor 4, the ladder drum 39
Is rotated by a minute angle, the slit 391 provided in the ladder drum 39 intermittently outputs the output signal of the photo interrupter 41, and one pulse signal is generated. Accordingly MPU34
Applies 0 volt from the motor drive circuit 33 to the geared motor 4 to stop the geared motor 4 and waits until the next synchronizing pulse or stop signal is input. When the synchronizing pulse is input, the above operation is repeated, and the geared motor 4 is stopped in response to the input of the stop signal. In this way, the geared motor 4 is rotated in synchronization with the synchronization pulse signal, and the rotation of the geared motor 4 is controlled by stopping the motor according to the pulse output from the photo interrupter 41. The slat 13 changes its angle at a constant speed regardless of the rotation speed of the motor. Therefore, if the interlocking control device 70 is used, the angles of the slats of the plurality of blinds can be easily unified.

In the above-described embodiment, the operation when closing the slat 13 has been described, but the operation when opening the slat and the operation that raises and lowers the blind are the same, and the height of the blind is easily unified. be able to.

[Effects of the Invention] As described above, according to the present invention, the rotation of the electric motor is controlled so that the slat angle is opened and closed by a constant angle for each pulse signal that is output, in accordance with the instruction from the opening and closing instruction means. Therefore, even if the rotation speed of the electric motor is different and the weight of the blind is different, the slat angles of all the blinds can be easily unified.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining the operation of one embodiment of the present invention. FIG. 2 is a diagram showing an outline of an electric blind to which an embodiment of the present invention is applied. FIG. 3 is a view showing a main part of a blind winding mechanism. FIG. 4 is a schematic block diagram of an electric blind to which an embodiment of the present invention is applied. FIG. 5 is a diagram showing an electric blind device according to an embodiment of the present invention. FIG. 6 is a timing chart in an embodiment of the present invention. In the figure, 2 is a controller, 3 is a control unit, 4 is a geared motor, 6, 7 and 8 are lifting units, 10 is a lifting tape, 11 is a ladder cord, 12 is a lifting shaft, 13 is a slat, 14 is a bottom rail, 33 is a motor drive circuit, 34 is
MPU, 37 are take-up drums, 38 and 41 are photo interrupters,
39 is a ladder drum, 42 is a receiving circuit, 50 is an electric blind, 60 is a signal line, 70 is an interlocking control device, 74 is an open switch,
75 indicates a closing switch.

Claims (1)

[Claims] 1. An electric blind device having a plurality of electric blinds for opening and closing the blades of a blind according to the rotation of an electric motor, the opening and closing for collectively instructing the opening and closing of the blades of the plurality of electric blinds. Commanding means and pulse signal generating means for continuously outputting a predetermined pulse signal to the plurality of electric blinds in response to a command from the opening / closing commanding means, each of the plurality of electric blinds An electric blind device, comprising control means for controlling the motor to rotate the electric motor by a constant angle to open and close the blade by a predetermined angle each time the pulse signal generated by the pulse signal generating device is given.