JP2000034875A - Electric blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the fall-height setter of an electric blind, in which adjustment operation can be made unnecessary and by which the blind can be dropped at a set place. SOLUTION: A motor is rotated, a stringy member 10 is rewound by a drum 39 and the blind is lowered in response to a lowering command from a command means. The blind has a control means stopping the motor in response to the discrimination of coincidence with a value set and stored by a lower-limit place setting means of a count value by a decision means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a descent height setting device for an electric blind, and more particularly to a descent height setting device for an electric blind capable of easily designating and releasing a descent position of the blind. is there.

[0002]

2. Description of the Related Art A conventionally proposed apparatus for setting the descent height of an electric blind comprises a speed reduction mechanism utilizing rotation of an elevating shaft and a cam. That is, the number of rotations of the elevating shaft is reduced, and a contact such as a micro switch linked to a cam or the like is opened / closed to stop the electric motor. To change the descent height, adjust the threaded bolt of the cam that turns on and off the micro switch in the speed reduction mechanism. The descent height was adjusted by controlling the energization time. In other words, the energization time of the electric motor is changed by changing the position of the cam.

[0003]

However, in such a conventional method of setting the descent height using the electric blind, the position of the cam is adjusted so that when the descent height is set, the electric blind must be used. The blinds had to be installed on the window frame and lowered, and the blinds had to be mounted according to the height of the window frame, and the cut-and-dry method had to be adjusted while operating the electric blind on site. For this reason, there is a drawback that a large amount of time and a large amount of labor are required for adjusting the attachment to the window frame. In addition, the friction state and position of the cam change due to prolonged use and aging, and the descent height changes.It is necessary to adjust the descent height manually each time, and furthermore, the cam, gear or screw bolt However, there is a disadvantage that the combination mechanism is complicated and the cost is high.

[0004] Therefore, a main object of the present invention is to provide a descent height setting device for an electric blind which can eliminate the need for adjustment work and can lower the blind to a set position.

[0005]

SUMMARY OF THE INVENTION The above object of the present invention is as follows.
This can be achieved by providing the lowering position height setting of the electric blind in the commanding means such as a controller and setting the lowering position height from the commanding means such as the controller.

That is, a descent height setting device for an electric blind according to the present invention is an electric blind for raising and lowering the blind in accordance with the rotation of a motor, and instructing means for instructing the blind to move up, down, or stop. And a plurality of blades connected by a string-shaped member, and a drum for rotating in accordance with the rotation of the electric motor and the electric motor to wind or rewind the string-shaped member to raise and lower the blind. And a connection means for connecting the head box and the command means, provided in the command means, and a lowermost position at which the blind descends after the stop operation. Lower limit position setting cancel means for setting and canceling, and the command means and the head box provided in the connection means. Coupling means for transmitting and receiving a lower limit position setting and canceling signal for setting and canceling a lowermost lower limit position at which the blind descends, and provided in the head box according to rotation of the drum. Blind position detecting means for detecting the ascending and descending position of the blind, a microcomputer for calculating the position of the blind based on a signal from the blind position detecting means in accordance with an ascending or descending command from the command means, and data of the position sequentially. A microcomputer that calculates a position of the blind based on a signal from the lower limit position setting canceling means for setting and canceling a lower limit position at which the blind lowers, and a rewritable memory (PRAM) area for storing, Rewritable memory (PRAM) for sequential storage
A rewritable memory (PRA) that stores the height data of the area as data at the lowest position of the microcomputer.
M) Transfer to area and rewrite memory (P
A rewritable memory (PRAM) area for storing data of a lowermost position in a (RAM) area, and storage means having two storage areas (memory areas A and B); and a blind position detection means for detecting the elevation position. A rewritable memory (PRA) of a microcomputer which calculates the position of the blind based on the signal based on the signal
M) The value of the lower limit position of an arbitrary position set in accordance with a signal from lower limit position setting canceling means for setting and canceling the lower limit position at which the blind descends is stored in the area and is rewritable. Memory (PRAM)
The value (data) stored in the area is compared with the value (data) of the lowermost position stored in the rewritable memory (PRAM) area of the microcomputer, and it is determined whether the values match. A discriminating means for discriminating, and in response to a descent command from the command means, the electric motor is rotated to rewind the cord-like member by the drum, and the blind is lowered. By transferring to the rewritable memory (PRAM) area for storing the position value (data) and determining that the data of the lowermost position matches the value stored in the rewritable memory (PRAM) area Control means for stopping the electric motor, and a plurality of memories for storing data of the blind stop position and the lowermost position. It comprises a location, and performs the change between the lower limit setting of the lower limit position setting cancellation unit.

A descent height setting device for an electric blind according to the present invention sets a descent height from a command means, counts a pulse signal generated according to rotation of a drum when the blind is lowered, If the count value corresponding to the height of the blind lowering coincides with the preset lower limit position, the blind lowering is stopped, so complicated adjustment work can be made unnecessary, and any window frame can be used. Correspondingly, the lowering position of the blind can be set from the command means.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As means for solving the conventional problems, for example, a head box for accommodating a blind elevating device, a command means for instructing a blind to be raised or processed, and a head box In the electric blind comprising a plurality of blades provided below and connected by the string-shaped member, the electric blind is provided in the head box, rotates according to the rotation of the electric motor, and winds or rewinds the string-shaped member. A drum for raising and lowering the blind, a pulse signal generating means for generating a pulse signal in accordance with the rotation of the drum, and a lower limit position setting means using a dip switch capable of setting the lower limit position of the blind to an arbitrary value; , And counts the generated pulse signals, and determines whether or not the counted value matches the value set by the lower limit position setting means. Another means, the electric motor is rotated in response to the lowering command, the string-shaped member is rewound by the drum, the blind is lowered, and it is determined that the count value matches the value set by the lower limit position setting means. It is conceivable to comprise a control means for stopping the electric motor in accordance with the above.

However, in the above-described lower limit position setting means for the electric blind, a lower limit setting switch is provided in a control unit built in the head box, and a combination of the switches sets a lower limit of the lowering of the blind. For this setting, a combination of switches is appropriately selected at a factory according to the height of the window to be installed, and the height is adjusted to the height of the window. However, if there is a mistake in setting the height of the window or setting the lower limit switch of the blind, etc., the blind may not fall down at the bottom of the window frame after mounting on the window, and there may be a gap, and And the blinds become loose. In order to correct this, it is necessary to change the setting of the lower limit setting switch and reset it at the installation site so that it is positioned at the height of the installed window.

However, the lower limit setting switch is provided in the control unit in the head box. Therefore, the work of resetting the lower limit setting switch is very poor because the head box is located above the window etc.
At a site where many blinds are installed such as a conference room, work efficiency is remarkably reduced. Also, if you follow a potted plant or other figurine at the bottom of the window frame after installing the blinds, in order to prevent the lower part of the blind from hitting these when lowering the blinds, the lowering of the blind each time you lower it It is necessary to stop the lowering of the blinds while watching or to reset the lower limit setting switch as described above. However, it is generally necessary to ask the construction company that installed the blinds to make this change.

[0011] To summarize the above problems, the above-described electric blind lowering position setting device has the following problems. (I) After the blind is installed on a window or the like, the change of the lower limit setting switch provided in the control unit in the head box is extremely inefficient in work efficiency in construction and cannot be easily changed. (Ii) To further narrow the range of the lower limit setting, it is necessary to increase the number of combinations of the lower limit switches. Further, the setting operation becomes complicated.

Therefore, in the present invention, the above-mentioned problem is solved by setting the descent position height of the electric blind as follows.

First, an external configuration of an embodiment of the present invention will be described with reference to FIGS. Referring to FIG. 2, a conventional electric blind includes a slat 13, a head box 15 accommodating a device for vertically driving the slat 13, a controller 2 for controlling the up and down movement of the slat 13, a controller and a head. And a connection cord 20 for connecting to the box. The head box 15 includes lifting units 6, 7, 8 for raising and lowering the slats 13 by raising and lowering the ladder cord 11, a geared motor 4 for rotating the lifting unit, and a control unit for controlling rotation of the motor. 3 and an elevating shaft 12 for transmitting the rotational force from the motor to each elevating unit.

The controller 2 includes a raising switch 21 for raising the slat 13, a stop switch 22 for stopping the movement of the slat, a lowering switch 23 for lowering the slat 13, an open switch 24 for opening the slat, and a slat. And a close switch 25 for closing the switch. The power cord 1 and the controller 2 are connected to the control unit 3. The control unit 3 includes a microcomputer, a power supply unit, and the like. A geared motor 4 composed of 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 a lifting shaft 12 via a coupling 5. The lifting shaft 12 includes
The lifting units 6, 7, and 8 are connected. Sensors, failure switches (not shown), and upper limit switches 16 built in these lifting units 6, 7, and 8 are connected to the control unit 3 by wiring members 9. The wiring member 9 includes a wiring to the geared motor 4 and a connection cord 20 to the controller 2. Lifting units 6 and 8
Includes a winding drum 37 and a ladder drum 39, and the elevating unit 7 includes only the ladder drum 39.

Lifting tape 1 is mounted on winding drum 37.
0 (which may be a string) is fixed at one end. The other end of the lifting tape 10 passes through the holes 13a of the plurality of slats 13 and
It is fixed to. Then, the winding drum 37 winds or rewinds the lifting tape 10 with the rotation of the elevating shaft 12 to move the slats 13 and the bottom rail 14 up and down. Further, one end of the ladder cord 11 is fixed to the ladder drum 39, and the other end of the ladder cord 11 is fixed to the bottom rail 14.

The ladder cord 11 is formed as a pair of two ladder cords 11a and 11b at intervals corresponding to the width of the slat 13 of, for example, 50 mm, 25 mm or 15 mm. The slats 13 are connected by a horizontal string 11c at intervals corresponding to the pitch p, for example, in a ladder shape. The slat 13 is inserted and held in a ladder-like space composed of ladder cords 11a and 11b and a lateral cord 11c. The ladder drum 39 rotates with the rotation of the elevating shaft 12, and controls the degree of opening of the slat. The bottom rail 14 functions as a weight for lowering the blind and a weight for preventing the blind from swaying due to wind or the like after the lowering.

The control unit 3, the geared motor 4, and the lifting units 6, 7, and 8 are composed of a head box 15 forming an outer box.
Covered by An upper limit switch 16 is provided at a lower portion of the head box 15, and the upper limit switch 16 is used when the blinds are wound up.
3 to operate to detect the upper limit position.
Note that 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 embodiment of the present invention. Next, an electrical configuration of an embodiment of the present invention will be described with reference to FIG. Power transformer 31
, AC power is input via a power cord 1. The power transformer 31 lowers the input AC power to supply a low voltage to the stabilized power supply unit 32, and generates power required for the control unit 3 and the geared mod 4. A microcomputer (hereinafter, referred to as an MPU) 34 is connected to a motor drive circuit 33, and controls the geared motor 4 in a forward rotation, a reverse rotation, or a brake mode in accordance with 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. In this way, by short-circuiting the input terminals of the geared motor 4, You can put a brake on That is, for example, when a rotational force is mechanically applied to the geared motor 4 as in the case of inertia due to the lowering of the blind or a case where the blind is artificially strongly pulled in the downward direction, the geared motor 4 is driven by the principle of the DC generator. Generates a back electromotive force. Therefore, by short-circuiting between the input terminals, this rotation is prevented,
That is, a current for reverse rotation flows, and the geared motor 4
Will stop. 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 MPU 34 includes RAMA and RAMB for setting the lowering position of the electric blind described later. RAMA is a photointerrupter 38 described later.
This is a part which always counts the blind height from the upper limit position by counting the intermittent signal from the computer and calculating the count number. The RAMB is a part that stores the height of the blind drop position input from the controller.

The failure switch 36 is built in the lifting units 6 and 8, and as an example of trouble, when the blind hits an obstacle or the like while the blind is descending and the descending operation is stopped, the geared motor 4
Continues to rotate in the descending direction, the lifting tape 10
Is loosened, and if this continues, the lifting tape 10 deviates from the winding drum 37, and the lifting tape 10 cannot be wound up even if the blinds are to be raised next, resulting in a serious failure.

In order to prevent this, the slackness of the lifting tape 10 is detected by a mechanical switch or an optical or magnetic sensor as a conventional technique, and the detected output is input to the MPU 34 via the motor drive circuit 33. The geared motor 4 is stopped. Thereby, the motor drive circuit 33 is set to the brake mode. Further, the MPU 34 reverses the blinds for an arbitrary time after the stop of the geared motor 4, winds up the blind, stops the lifting tape 10, and then stops the geared motor 4. The winding drum 37 winds or rewinds the lifting tape 10 with the rotation of the geared motor 4 and raises and lowers the blind, and includes guides 371 and 372 for the lifting tape 10. Further, for example, a slit 373 is provided around the guide 371.
Are formed. In addition, a disc may be attached to another portion of the elevating shaft 12 separately from the winding drum 37 to form a slit in the disc, and rotation of the elevating shaft 12 may be performed.
Alternatively, even if the rotation of the motor shaft of the geared motor 4 is detected, the same effect can be obtained, and the mounting position and method are not limited.

A photo interrupter 38 is provided in connection with the guide 371 of the winding drum 37. The photo interrupter 38 optically detects the intermittent 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 30. That is, the MPU 34 controls the winding drum 37
, The amount of lifting or lowering of the lifting tape 10 can be known 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 slat 13 to change the input amount of external light.
The interior is adjusted to an appropriate brightness and external light is blocked.

The ladder drum 39 is fitted with a frictional force via a drum shaft 40 penetrating the elevating shaft 12. The elevating shaft 12 and the drum shaft 40 rotate integrally (synchronously), but when the ladder drum 39 is rotated substantially half a turn, the rotation of the ladder drum 39 is stopped by a projection (not shown) provided by the head box 15 or the like. And slips with the drum shaft 40 and idles. When the elevating shaft 12 is inverted, the ladder drum 39 is also inverted in the same manner, but hits a projection such as the head box 15 and idles in the same manner as described above. When the rudder drum 39 rotates almost half a turn, the slat 1
3 rotates, and the angle of the slat 13 changes. That is, the slat 13 is opened from the closed state inclined to the indoor side to the horizontal state, and is further changed to the closed state inclined to the outdoor side. When the elevating shaft 12 rotates in the opposite direction to that described above, the rotation of the slat 13 is reversed. That is, it is opened from a state of being inclined and closed on the outdoor side to a horizontal state, and is a state of being inclined and closed on the indoor side.

At one end of the ladder drum 39, a slit 391 for detecting the rotation of the ladder drum 39 is formed. Insert this slit 391 into the ladder drum 39
Is formed at an angle corresponding to substantially half a rotation of the photodetector, 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 and converts it into an electric signal.
Give to PU34. The MPU 34 can know the angle of the ladder drum 39, that is, the angle of the slat 13 according to the electric signal. The lower limit position setting switch 42 is for setting the lower limit position when the blind is lowered, and in this embodiment, is constituted by four switches. The switches 21 to 2 of the controller 2
5. The clock generation circuit 43 and the reset circuit 44
Connected to PU34.

FIG. 1 is a flowchart for explaining a specific operation of one embodiment of the present invention. Next, a specific operation of the embodiment of the present invention will be described with reference to FIGS. When power is supplied to the power cord 1, the AC power is converted to a low voltage by the power transformer 31 and supplied to the stabilized power supply 32. The stabilized power supply generates a stable variable power supply Vcc necessary for the control unit and a power supply VM for driving the geared motor 4. First, when raising the blind, the raising switch 21 provided in the controller 2 is used.
Operate. The MPU 34 receives a signal from the up switch 21 and supplies an intermittent signal to the motor drive circuit 33 to close the slat 13.

In response, the motor drive circuit 33 rotates the geared motor 4 intermittently. When the geared motor 4 is intermittently rotated, the rotational force intermittently rotates the elevating shaft 12 via the coupling 5. With the rotation of the lifting shaft 12, the winding drum 37 and the ladder drum 39 are rotated via the drum shaft 40. Due to the intermittent rotation, as a result, if one of the ladder cords 11, for example, the ladder cord 11b is wound up while the ladder drum 39 is slowly rotating, the ladder cord 11a is lowered. That is, the ladder drum 3
The rotation of 9 in the direction of the arrow in FIG. 3 causes the ladder cord 11b to rise and the 11a side to fall. Thereby, the slat 13 rotates in the direction of the arrow, and enters the closed state.

The ladder drum 39 rotates, a slit 391 provided in the ladder drum 39 interrupts the output signal of the photo interrupter 41, and the pulse signal is
34. When the ladder drum 39 further rotates, that is, when the slat 13 is gradually closed, the MPU 34 sequentially counts the pulse signals. When the ladder drum 39 rotates until the slat 13 is completely closed, a protrusion (not shown) provided on the ladder drum 39 is provided.
Hits the projection 45 shown in FIG. 3, and the ladder drum 39 idles. Therefore, the pulse signal from the photo interrupter 41 is not given to the MPU 34. Accordingly, M
The PU 34 determines that the slat 13 has been closed.
Further, the MPU 34 counts the number of pulses of the pulse signal output from the photointerrupter 41 after the up switch 21 is operated, and stores the counted value as a moving angle of the slat 13 in a memory (not shown).

Next, the MPU 34 is connected to the photo interrupter 4
When the pulse signal from 1 is no longer given, a continuous winding signal is given to the motor drive circuit 33. In response, the motor drive circuit 33 changes the geared motor 4 from intermittent rotation to continuous rotation, and shifts to blind winding operation.

That is, as the geared motor 4 rotates continuously, the winding drum 37 rotates continuously and winds the lifting tape 10. Since the other end of the lifting tape 10 is fixed to the bottom rail 14, the lifting tape 10 sequentially rises from the lowermost part of the slat 13. When stopping the raising of the blind, the stop switch 22 provided on the controller 2 is operated. MPU34 is a stop switch 2
A stop signal is given to the motor drive circuit 33 in response to the command from the second. In response, the motor drive circuit 33 stops the geared motor 4. At this time, the motor drive circuit 33 short-circuits the input terminal of the geared motor 4 and
Brake the vehicle to stop. Since this is a well-known technique, a detailed description thereof will be omitted.

Next, as described above, in order to return to the angular position of the slat 13 stored in the MPU 34, the MPU
34 supplies a reverse intermittent signal to the motor drive circuit 33 to reverse the ladder drum 39 in the direction opposite to the arrow shown in FIG. As a result, the ladder code 11 performs an operation reverse to that described above, and the slat 13 rotates in the direction opposite to the arrow and is opened. At the same time, the MPU 34 counts the pulse signal from the photointerrupter 41, and if the pulse signal matches the count value input at the time of rising, the MPU 34 gives a signal for stopping the geared motor 4 to the motor drive circuit 33, and 4 is stopped. As a result, the blind stops and the slats 13
The angle is automatically adjusted.

The operation for lowering the blind is performed by operating a lowering switch 23 provided on the controller 2. The lowering of the blind is performed by performing an operation substantially opposite to the above-described raising. By operating the stop switch 22 of the controller 2,
At that time, the geared motor 4 stops and the blind stops. Further, the angle of the slat 13 is automatically adjusted to the angle before descending in the same manner as described above.

Next, a method of setting the blind descent height will be described. The setting of the descent height of the blind according to the present invention is performed using a stop and descent switch provided in a conventional controller. In addition to the setting of the descending position, the setting by the dip switch described in the related art may be used together.

FIG. 1 is a flowchart showing the procedure for setting the lower limit position of the electric blind according to the present invention. This will be described below with reference to FIG. When the up switch 21 is input, the MPU 34 rotates the geared motor 4 via the drive circuit 33, and the blind rises. If there is no input from the controller 2, the blind rises until the upper limit switch 16 is pressed by the slat 13, and the upper limit switch 1
When there is an input of 6, the MPU 34 receives this input and stops the geared motor 4 via the motor drive circuit 33.
The blinds stop. At this time, the blind is located at the uppermost limit, and at the same time when the upper limit switch 16 is input, the MPU 34 initializes the height data and sets this position as the upper limit value.

Next, when the descent switch 23 of the controller 2 is input, the blind starts descent. At the same time as the descent starts, the photo interrupter 38 inputs an intermittent signal to the MPU 34 through the slit 373 provided in the winding drum 37. The MPU 34 knows the number of rotations of the winding drum 37 by counting the intermittent signal, and knows the amount of drop (height) of the blind. It is visually confirmed that the blind height has dropped to the desired lower limit, and the stop switch 22 provided on the controller 2 is input. Upon receiving this input, the MPU 34 stops the geared motor 4 via the motor drive circuit 33 (brake mode). The blinds stop.

At this time, the MPU 34 stores the count number of the intermittent signal from the photo interrupter 38 in the RAMA. After confirming that the blinds are at the desired lower limit, the stop switch 22 provided on the controller 2 is first pressed, and then the down switch 23 is simultaneously input for an arbitrary set time (for example, 2 seconds).
Receives this input and sets the current blind position as the lower limit and sets the above count number as the lower limit A to the RAM.
Store it in B.

The reason why the stop switch 22 is first inputted first is as follows. As soon as another switch (elevation, opening / closing angle) is input, the blind operates according to the input. To prevent this, first stop switch 2
If 2 is input and then the down switch is input, the blind will not operate. While the stop switch 22 is being input, the blind does not operate even if other switches are input. (The geared motor 4 remains stopped).

When the blind is raised by operating the raising switch 21 of the controller 2 in this state, the MPU 34 counts the intermittent signal from the photo interrupter 38,
The height from the upper limit position is always calculated, and the count number of the intermittent signal from the upper limit position is stored in the RAMA. When the stop switch 22 is operated to stop the blind, and then the descent switch 23 is operated to lower the blind, the intermittent signal from the photo interrupter 38 is counted from the position, and the height is calculated from the upper limit position. Are sequentially stored in the RAMA.

The intermittent signal corresponding to the height from the upper limit position is counted, and RAMA and RAMB are compared. If this value matches the lower limit value A, the microcomputer 34 determines that the blind has dropped to the lower limit. Then, the geared motor 4 is stopped via the drive circuit 33 (brake mode).
The blind is stopped, and the blind is stopped at the lowest position by the simultaneous operation of the stop switch 22 and the descent switch 23 from the controller 2.

The lowermost position set by the controller 2 by the simultaneous operation of the stop switch 22 and the descent switch 23 is released by the simultaneous operation of the stop switch 22 and the ascent switch 21. That is, RAMB is erased. In this case as well, the stop switch 22 is input first, and then the up switch 21 is input. The lower limit at this time depends on the setting position of the lower limit switch 42. With the same concept, the angle of the blades can be simultaneously stored in the controller 2 by simultaneously inputting the open switch 24 and the stop switch 22 provided in the controller 2 to store the current blade angle. By inputting, the memory of the blade angle can be erased, and it is easy to always set the blade angle to a constant value after ascending and descending. However, when changing the lower limit value of the blind, the controller 2
After the stop switch 22 and the up switch 21 are simultaneously inputted for an arbitrary time, the RAMB storing the lower limit value A is erased, and the blind is raised or lowered to the changed position. What is necessary is just to input the descent switch 23 simultaneously. The position of the blind is newly stored in RAMB, this value becomes the new lower limit A, and when the blind is lowered thereafter, if the new lower limit A and RAMA match, the blind stops at the lower limit. Will be.

[0041]

As described above, according to the present invention, since the blind lowering position height setting means is provided in the command means such as the controller, the command means such as the controller distant from the headbox provided at a high place is provided. The height of the blind drop position can be set at the position. Further, the setting of the descending position height can be performed extremely easily and reliably by simultaneous operation such as stopping the command means and descending.
Therefore, the height of the blind can be easily adjusted even after the electric blind is attached to the window frame. In addition, there is an effect that the change can be easily made even after setting once. As a result, the workability at the time of construction and the workability at the time of assembling the blinds are remarkably improved, and the omission or combination of the lower limit switches can be reduced, and the complexity and mistakes of setting the lower limit switches can be prevented, and the cost can be reduced. And the like.

[Brief description of the drawings]

FIG. 1 is a flowchart for explaining a specific operation of an embodiment of the present invention.

FIG. 2 is a diagram showing an outline of an embodiment of the present invention.

FIG. 3 is a diagram illustrating a main part of a blind winding mechanism.

FIG. 4 is a schematic block diagram of an embodiment of the present invention.

[Explanation of symbols]

 2 Controller 3 Control unit 4 Geared motor 6, 7, 8 Lifting unit 10 Lifting tape 11 Ladder coat 12 Lifting shaft 13 Slat 14 Bottom rail 33 Motor drive circuit 34 Microcomputer 37 Winding drum 38, 41 Photo interrupter 39 Rudder drum 42 Lower limit position Setting switch

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[Procedure amendment]

[Submission date] August 20, 1999 (1999.8.2
0)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] electric blind

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates <br/> the electric blind, in particular, relates to an electric blind that can be or clear easily specify the angular position or the lowered position of the blind wing It is.

[0002]

2. Description of the Related Art Conventionally , in setting the angular position of the blades of an electric blind, it is necessary to raise and lower the blind.
When the operation is performed, the blade performs the closing operation, and then,
Whenever the desired blade angle is set, any desired blade
The operation for resetting the angle is performed. In addition, electric
The apparatus for setting the falling height of the lined is constituted by a speed reduction mechanism applying rotation of a lifting shaft and a cam. That is, the number of rotations of the elevating shaft is reduced, and a contact such as a micro switch linked to a cam or the like is opened / closed to stop the electric motor. To change the descent height, adjust the threaded bolt of the cam that turns on and off the micro switch in the speed reduction mechanism. The descent height was adjusted by controlling the energization time. In other words, the energization time of the electric motor is changed by changing the position of the cam.

[0003]

However, the setting of the angular position of the blade using such a conventional electric blind is described.
In the method, when the blind is raised and lowered, the blades
Perform the closing operation, and then move the blade to the desired blade angle.
To the desired blade angle from the command and command means
There is a need. In addition, such conventional electric blinds
In setting the descent height, the position of the cam is adjusted, so when setting the descent height, be sure to install the electric blind on the window frame, lower the blind, and lower the window frame height. It was necessary to adjust it by a cut-and-dry method while operating the electric blind at the site, attaching it to the blinds according to the requirements. For this reason, there is a drawback that a large amount of time and a large amount of labor are required for adjusting the attachment to the window frame. In addition, the friction state and position of the cam change due to prolonged use and aging, and the descent height changes.It is necessary to adjust the descent height manually each time, and furthermore, the cam, gear or screw bolt However, there is a disadvantage that the combination mechanism is complicated and the cost is high.

[0004] Therefore, it is a primary object of the present invention to eliminate the need for adjustment work and to set a predetermined angular position of the blade.
Or it can be set easily and securely at the descent height position
It is to provide an electric blind that can .

[0005]

SUMMARY OF THE INVENTION The above object of the present invention is as follows.
This can be achieved by providing the lowering position height setting of the electric blind in the commanding means such as a controller and setting the lowering position height from the commanding means such as the controller.

That is, a descent height setting device for an electric blind according to the present invention is an electric blind for opening and closing a blade of a blind according to rotation of an electric motor, and a command means for instructing the opening and closing of the blade of the blind. A plurality of blades connected by a string-shaped member, the electric motor and the electric motor are rotated in accordance with the rotation of the electric motor, wind the cord-shaped member, or rewind and open and close the blind. A head box for accommodating a drum for making the head box and a connecting means for connecting the head box and the command means, provided in the command means, and after opening and closing the blades, Blind slats
Blade position setting / release means for setting and releasing the open / close position ; and an opening / closing angle of the blind blade provided between the command means and the head box, provided in the connection means.
And coupling means for transmitting and receiving setting and release of the signal-off position for setting and releasing degrees, provided in said head box, detects the opening angle of the blind blades in accordance with the rotation of the drum Opening / closing angle detecting means, a microcomputer which calculates a blade angle based on a signal from the blade opening / closing angle detecting means in response to a blade opening / closing command from the command means, and a data of the angle. Rewritable memory (PRAM) for sequentially storing data
And the area, the microcomputer for calculating the angle of the blind vane by a signal from the opening angle position setting cancellation unit for setting releasing the opening angle of the blind vanes rewritable for sequentially storing the data of the angle The data of the angle of the blade in the memory (PRAM) area is transferred to a rewritable memory (PRAM) area for storing the angle position of the blade of the microcomputer, and the angle position of the blade is stored in the rewritable memory (PRAM) area .
Rewritable memory (PRAM) for storing data
Area and two storage areas (memory areas A and B), and based on a signal from a blade angle detecting means of a blind for detecting an opening / closing angle of the blade , the signal is used to calculate the angle of the blade of the blind. And the angle position of an arbitrary position set by a signal from an opening / closing position setting canceling means for setting and canceling the opening / closing angle of the blades of the blind is stored in a rewritable memory (PRAM) area of the microcomputer. compared to the rewritable memory value value that is stored in the (PRAM) Eria (data), the value of the angular position of the vane that is stored in the memory (PRAM) Eria (data),
Discriminating means for discriminating whether the values match, depending on the open or closed command from said command means to rotate the motor to rewind the cord-like member by the drum or winding
Rewritable memory (PRAM) which is raised and opened to open and close the blades of the blind and transferred to a rewritable memory (PRAM) area for storing the value (data) of the open / close position of the blades of the microcomputer by the determining means.
Although Ki was identical with the stored values to data of the opening and closing positions of the blade in Eria depending by it is judged, the corners of the blind wings and a control means for stopping the electric motor
It comprises a plurality of storage devices for storing degree position, and performs a release and setting of the angular position of the blade by the angle position <br/> location setting cancellation unit. Also, depending on the rotation of the motor,
An electric blind for raising and lowering and opening and closing the door,
Raising, lowering or stopping the line and opening and closing the slat
Command means for commanding the
A plurality of blades, the electric motor and the electric motor
It rotates in accordance with the rotation, winds up the cord-like member, and
To rewind and raise and lower and open and close the blind
A head box for accommodating a drum for
And connection means for connecting the command means and the command means.
Including, provided in said command means, a stop
After operation, set the lowermost position where the blind descends
Lower limit position setting release means for releasing
Blade position setting release means for releasing the setting of the open / close position of the blade
Provided in the connection means, the command means and the
Lowermost position of the blind with respect to the storage box
Set and release and set and release the slat opening and closing angle
To set and release the lower limit position and open / close position for
Means for transmitting and receiving signals, and the head box
Provided in the blind according to the rotation of the drum
Position detection device that detects the vertical position and opening / closing angle of the vehicle
A step and opening / closing angle detecting means, and
Or the position of the blind by the command of lowering and opening and closing.
Based on signals from the position detection means and the opening / closing angle detection means.
A microcomputer for calculating the position of the lined and the angle of the blade,
Rewriteable that sequentially stores the position and angle data
Memory (PRAM) area and the blinds
Before canceling the lower limit position to be lowered and the opening / closing angle
The lower limit position setting canceling means and the opening / closing angle position setting canceling means
Calculates the position and angle of the blind by the signal from
Microcomputer sequentially stores the position and angle data
Rewritable memory (PRAM) area height
And the angle data are stored at the lowest position of the microcomputer.
Rewritable memory (P
RAM) Data of lower limit position and angle position in area
Rewritable memory (PRAM) area to store
With two storage areas (memory areas A and B)
Storage means and a blind for detecting the elevation position and the opening / closing angle.
Based on the signals from the command position detection means and the blade angle detection means.
The signal of the blind and the angle of the blade
Rewritable memory (PRA)
M) memorize in the area and lower the blind
Lower limit position for setting and releasing the lower limit position
Release means and opening / closing position setting for releasing the opening / closing angle
Of the arbitrary position set by the signal from the
The value of the lower limit position and any angle position can be rewritten as described above.
The value stored in the memory (PRAM) area (data
Data) and memory (PRAM) area
The lower limit position and the angle position.
Discriminating means for discriminating whether or not they match, and the command means
The motor is turned in response to a descent command and opening / closing command from
And rewind the string-like member by the drum to
By lowering and opening and closing the line, by the determination means,
Value (data) of the lowest position and open / close position of the microcomputer
Rewritable memory (PRAM) area for storing
Rewritable memory (PRAM) area
Value that stores the data of the lowermost position and the open / close position
In response to the determination that the
Control means for stopping the motive;
Multiple positions to store the position, minimum position, and blade angle position.
Storage means, said lower limit position setting canceling means and an angular position
Setting and release of the lower limit and angle position
Is set and canceled.

[0007] The electric blind according to the present invention includes a command hand.
The motor is rotated according to the opening or closing command from the gear.
Use the drum to rewind or wind
Open and close the Indian wings and determine the microcomputer
Rewritable to store the value (data) of the open / close position of the blade
Transfer to a functional memory (PRAM) area and rewrite
Open / close position of the blade in the available memory (PRAM) area
Was determined to match the stored data with the stored value
The motor is stopped accordingly, and the angular position of the blade
The setting and cancellation of the position are performed. Also, the command means
Rotation of the motor in response to the
Rewinds the string-like member with a drum and lowers the blinds
And open / close the discrimination means to determine the lowest
Rewritable to store the position and open / close position values (data)
Transferable to a simple memory (PRAM) area for rewriting
Memory (PRAM) area at the lowest position and open
It is determined that the closed position data matches the stored value.
The motor is stopped according to the
Ru der performs release and setting of the angular position and the release and the.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a means for solving the conventional problems , for example, a blind height is set.
In the head box for accommodating the blind lifting device, command means for commanding the raising or processing of the blind, and a plurality of blades provided below the head box and connected by a string-shaped member, In the electric blind consisting of: a drum provided in the head box, which rotates according to the rotation of the electric motor, winds or rewinds the string-shaped member to raise and lower the blind, and a pulse signal according to the rotation of the drum Pulse signal generating means, a lower limit position setting means using a dip switch capable of setting a lower limit position at which the blind descends to an arbitrary value, and the generated pulse signals are counted, and the counted value is set to the lower limit position. Means for judging whether or not the value coincides with the value set by the means; and It is conceivable to comprise a control means for rewinding the string-like member, lowering the blind, and stopping the electric motor when it is determined that the count value matches the value set by the lower limit position setting means. .

However, in the above-described lower limit position setting means for the electric blind, a lower limit setting switch is provided in a control unit built in the head box, and a combination of the switches sets a lower limit of the lowering of the blind. For this setting, a combination of switches is appropriately selected at a factory according to the height of the window to be installed, and the height is adjusted to the height of the window. However, if there is a mistake in setting the height of the window or setting the lower limit switch of the blind, etc., the blind may not fall down at the bottom of the window frame after mounting on the window, and there may be a gap, and And the blinds become loose. In order to correct this, it is necessary to change the setting of the lower limit setting switch and reset it at the installation site so that it is positioned at the height of the installed window.

However, the lower limit setting switch is provided in the control unit in the head box. Therefore, the work of resetting the lower limit setting switch is very poor because the head box is located above the window etc.
At a site where many blinds are installed such as a conference room, work efficiency is remarkably reduced. Also, if you follow a potted plant or other figurine at the bottom of the window frame after installing the blinds, in order to prevent the lower part of the blind from hitting these when lowering the blinds, the lowering of the blind each time you lower it It is necessary to stop the lowering of the blinds while watching or to reset the lower limit setting switch as described above. However, it is generally necessary to ask the construction company that installed the blinds to make this change.

To summarize the above problems, the above-described apparatus for setting the descending position of the electric blind has the following problems.

(I) After the blinds are installed on the window or the like, the change of the lower limit setting switch provided in the control unit in the head box is extremely inefficient in work and cannot be easily changed.

(Ii) In order to make the range of the lower limit setting finer, it is necessary to increase the number of combinations of the lower limit switches. Further, the setting operation becomes complicated.

Therefore, in the present invention, the above-mentioned problem is solved by setting the descent position height of the electric blind as described below, and the setting and release of the angular position of the blades are performed.
The door was set to obtain easy and reliable line.

First, an external configuration of an embodiment of the present invention will be described with reference to FIGS. Referring to FIG. 2, a conventional electric blind includes a slat 13, a head box 15 accommodating a device for vertically driving the slat 13, a controller 2 for controlling the up and down movement of the slat 13, a controller and a head. And a connection cord 20 for connecting to the box. The head box 15 includes lifting units 6, 7, 8 for raising and lowering the slats 13 by raising and lowering the ladder cord 11, a geared motor 4 for rotating the lifting unit, and a control unit for controlling rotation of the motor. 3 and an elevating shaft 12 for transmitting the rotational force from the motor to each elevating unit.

The controller 2 includes a raising switch 21 for raising the slat 13, a stop switch 22 for stopping the movement of the slat, a lowering switch 23 for lowering the slat 13, an open switch 24 for opening the slat, and a slat. And a close switch 25 for closing the switch. The power cord 1 and the controller 2 are connected to the control unit 3. The control unit 3 includes a microcomputer, a power supply unit, and the like. A geared motor 4 composed of 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 a lifting shaft 12 via a coupling 5. The lifting shaft 12 includes
The lifting units 6, 7, and 8 are connected. Sensors, failure switches (not shown), and upper limit switches 16 built in these lifting units 6, 7, and 8 are connected to the control unit 3 by wiring members 9. The wiring member 9 includes a wiring to the geared motor 4 and a connection cord 20 to the controller 2. Lifting units 6 and 8
Includes a winding drum 37 and a ladder drum 39, and the elevating unit 7 includes only the ladder drum 39.

Lifting tape 1 is mounted on winding drum 37.
0 (which may be a string) is fixed at one end. The other end of the lifting tape 10 passes through the holes 13a of the plurality of slats 13 and
It is fixed to. Then, the winding drum 37 winds or rewinds the lifting tape 10 with the rotation of the elevating shaft 12 to move the slats 13 and the bottom rail 14 up and down. Further, one end of the ladder cord 11 is fixed to the ladder drum 39, and the other end of the ladder cord 11 is fixed to the bottom rail 14.

The ladder cords 11 are formed as a pair of two ladder cords 11a and 11b at an interval corresponding to the width of the slat 13 of, for example, 50 mm, 25 mm or 15 mm. The slats 13 are connected by a horizontal string 11c at intervals corresponding to the pitch p, for example, in a ladder shape. The slat 13 is inserted and held in a ladder-like space composed of ladder cords 11a and 11b and a lateral cord 11c. The ladder drum 39 rotates with the rotation of the elevating shaft 12, and controls the degree of opening of the slat. The bottom rail 14 functions as a weight for lowering the blind and a weight for preventing the blind from swaying due to wind or the like after the lowering.

The control unit 3, the geared motor 4, and the lifting units 6, 7, and 8 are composed of a head box 15 forming an outer box.
Covered by An upper limit switch 16 is provided at a lower portion of the head box 15, and the upper limit switch 16 is used when the blinds are wound up.
3 to operate to detect the upper limit position.
Note that 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 one embodiment of the present invention. Next, an electrical configuration of an embodiment of the present invention will be described with reference to FIG. Power transformer 31
, AC power is input via a power cord 1. The power transformer 31 lowers the input AC power to supply a low voltage to the stabilized power supply unit 32, and generates power required for the control unit 3 and the geared mod 4. A microcomputer (hereinafter, referred to as an MPU) 34 is connected to a motor drive circuit 33, and controls the geared motor 4 in a forward rotation, a reverse rotation, or a brake mode in accordance with 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. In this way, by short-circuiting the input terminals of the geared motor 4, You can put a brake on That is, for example, when a rotational force is mechanically applied to the geared motor 4 as in the case of inertia due to the descent of the blind or the case where the blind is artificially pulled strongly in the downward direction, the geared motor 4 is driven by the principle of a DC generator. Generates a back electromotive force. Therefore, by short-circuiting the input terminals, this direction is prevented from rotating.
That is, a current for reverse rotation flows, and the geared motor 4
Will stop. A voltage detection circuit 35 is connected to the MPU 34. This 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 MPU 34 includes RAMA and RAMB for setting the lowering position of the electric blind described later. RAMA is a photo interrupter 38 described later.
This is a part which always counts the blind height from the upper limit position by counting the intermittent signal from the computer and calculating the count number. The RAMB is a part that stores the height of the blind drop position input from the controller.

The obstacle switch 36 is built in the lifting units 6 and 8, and as an example of a trouble, when the blind hits an obstacle or the like while the blind is descending and the operation of descending is stopped, the geared motor 4 is stopped.
Continues to rotate in the descending direction, the lifting tape 10
Is loosened, and if this continues, the lifting tape 10 deviates from the winding drum 37, and the lifting tape 10 cannot be wound up even if the blinds are to be raised next, resulting in a serious failure.

In order to prevent this, the slackness of the lifting tape 10 is detected by a mechanical switch or an optical or magnetic sensor as a conventional technique, and the detected output is input to the MPU 34 via the motor drive circuit 33. The geared motor 4 is stopped. Thereby, the motor drive circuit 33 is set to the brake mode. Further, the MPU 34 reverses the blinds for an arbitrary time after the stop of the geared motor 4, winds up the blind, stops the lifting tape 10, and then stops the geared motor 4. The winding drum 37 winds or rewinds the lifting tape 10 with the rotation of the geared motor 4 and raises and lowers the blind, and includes guides 371 and 372 for the lifting tape 10. Further, for example, a slit 373 is provided around the guide 371.
Are formed. In addition, a disc may be attached to another portion of the elevating shaft 12 separately from the winding drum 37 to form a slit in the disc, and rotation of the elevating shaft 12 may be performed.
Alternatively, even if the rotation of the motor shaft of the geared motor 4 is detected, the same effect can be obtained, and the mounting position and method are not limited.

A photo interrupter 38 is provided in connection with the guide 371 of the winding drum 37. The photo interrupter 38 optically detects the intermittent 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 30. That is, the MPU 34 controls the winding drum 37
, The amount of lifting or lowering of the lifting tape 10 can be known 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 slat 13 to change the input amount of external light.
The interior is adjusted to an appropriate brightness and external light is blocked.

The ladder drum 39 is fitted with a frictional force via a drum shaft 40 penetrating the elevating shaft 12. The elevating shaft 12 and the drum shaft 40 rotate integrally (synchronously), but when the ladder drum 39 is rotated substantially half a turn, the rotation of the ladder drum 39 is stopped by a projection (not shown) provided by the head box 15 or the like. And slips with the drum shaft 40 and idles. When the elevating shaft 12 is inverted, the ladder drum 39 is also inverted in the same manner, but hits a projection such as the head box 15 and idles in the same manner as described above. When the rudder drum 39 rotates almost half a turn, the slat 1
3 rotates, and the angle of the slat 13 changes. That is, the slat 13 is opened from the closed state inclined to the indoor side to the horizontal state, and is further changed to the closed state inclined to the outdoor side. When the elevating shaft 12 rotates in the opposite direction to that described above, the rotation of the slat 13 is reversed. That is, it is opened from a state of being inclined and closed on the outdoor side to a horizontal state, and is a state of being inclined and closed on the indoor side.

At one end of the ladder drum 39, a slit 391 for detecting the rotation of the ladder drum 39 is formed. Insert this slit 391 into the ladder drum 39
Is formed at an angle corresponding to substantially half a rotation of the photodetector, 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 and converts it into an electric signal.
Give to PU34. The MPU 34 can know the angle of the ladder drum 39, that is, the angle of the slat 13 according to the electric signal. The lower limit position setting switch 42 is for setting the lower limit position when the blind is lowered, and in this embodiment, is constituted by four switches. The switches 21 to 2 of the controller 2
5. The clock generation circuit 43 and the reset circuit 44
Connected to PU34.

FIG. 1 is a flowchart for explaining a specific operation of one embodiment of the present invention. Next, a specific operation of the embodiment of the present invention will be described with reference to FIGS. When power is supplied to the power cord 1, the AC power is converted to a low voltage by the power transformer 31 and supplied to the stabilized power supply 32. The stabilized power supply generates a stable variable power supply Vcc necessary for the control unit and a power supply VM for driving the geared motor 4. First, when raising the blind, the raising switch 21 provided in the controller 2 is used.
Operate. The MPU 34 receives a signal from the up switch 21 and supplies an intermittent signal to the motor drive circuit 33 to close the slat 13.

In response, the motor drive circuit 33 rotates the geared motor 4 intermittently. When the geared motor 4 is intermittently rotated, the rotational force causes the elevating shaft 12 to intermittently rotate via the coupling 5. With the rotation of the lifting shaft 12, the winding drum 37 and the ladder drum 39 are rotated via the drum shaft 40. Due to the intermittent rotation, as a result, if one of the ladder cords 11, for example, the ladder cord 11b is wound up while the ladder drum 39 is slowly rotating, the ladder cord 11a is lowered. That is, the ladder drum 3
The rotation of 9 in the direction of the arrow in FIG. 3 causes the ladder cord 11b to rise and the 11a side to fall. Thereby, the slat 13 rotates in the direction of the arrow, and enters the closed state.

The ladder drum 39 rotates, a slit 391 provided in the ladder drum 39 interrupts the output signal of the photo interrupter 41, and the pulse signal is
34. When the ladder drum 39 further rotates, that is, when the slat 13 is gradually closed, the MPU 34 sequentially counts the pulse signals. When the ladder drum 39 rotates until the slat 13 is completely closed, a protrusion (not shown) provided on the ladder drum 39 is provided.
Hits the projection 45 shown in FIG. 3, and the ladder drum 39 idles. Therefore, the pulse signal from the photo interrupter 41 is not given to the MPU 34. Accordingly, M
The PU 34 determines that the slat 13 has been closed.
Further, the MPU 34 counts the number of pulses of the pulse signal output from the photo-interrupter 41 after the up switch 21 is operated, and stores the counted value as a moving angle of the slat 13 in a memory (not shown).

Next, the MPU 34 is connected to the photo interrupter 4
When the pulse signal from 1 is no longer given, a continuous winding signal is given to the motor drive circuit 33. In response, the motor drive circuit 33 changes the geared motor 4 from intermittent rotation to continuous rotation, and shifts to blind winding operation.

That is, as the geared motor 4 rotates continuously, the winding drum 37 rotates continuously and winds the lifting tape 10. Since the other end of the lifting tape 10 is fixed to the bottom rail 14, the lifting tape 10 sequentially rises from the lowermost part of the slat 13. When stopping the raising of the blind, the stop switch 22 provided on the controller 2 is operated. MPU34 is the stop switch 2
A stop signal is given to the motor drive circuit 33 in response to the command from the second. In response, the motor drive circuit 33 stops the geared motor 4. At this time, the motor drive circuit 33 short-circuits the input terminal of the geared motor 4 and
Brake the vehicle to stop. Since this is a well-known technique, a detailed description thereof will be omitted.

Next, as described above, in order to return to the angular position of the slat 13 stored in the MPU 34, the MPU
34 supplies a reverse intermittent signal to the motor drive circuit 33 to reverse the ladder drum 39 in the direction opposite to the arrow shown in FIG. As a result, the ladder code 11 performs an operation reverse to that described above, and the slat 13 rotates in the direction opposite to the arrow and is opened. At the same time, the MPU 34 counts the pulse signal from the photointerrupter 41, and if the pulse signal matches the count value input at the time of rising, the MPU 34 gives a signal for stopping the geared motor 4 to the motor drive circuit 33, and 4 is stopped. As a result, the blind stops and the slats 13
The angle is automatically adjusted.

The operation for lowering the blind is performed by operating a lowering switch 23 provided in the controller 2. The lowering of the blind is performed by performing an operation substantially opposite to the above-described raising. By operating the stop switch 22 of the controller 2,
At that time, the geared motor 4 stops and the blind stops. Further, the angle of the slat 13 is automatically adjusted to the angle before descending in the same manner as described above.

Next, a method of setting the blind descent height will be described. The setting of the lowering height of the blind according to the present invention is performed using a stop and lowering switch provided in a conventional controller. In addition to the setting of the descending position, the setting by the dip switch described in the related art may be used together.

FIG. 1 is a flowchart showing the procedure for setting the lower limit position of the electric blind according to the present invention. This will be described below with reference to FIG. When the up switch 21 is input, the MPU 34 rotates the geared motor 4 via the drive circuit 33, and the blind rises. If there is no input from the controller 2, the blind rises until the upper limit switch 16 is pressed by the slat 13, and the upper limit switch 1
When there is an input of 6, the MPU 34 receives this input and stops the geared motor 4 via the motor drive circuit 33.
The blinds stop. At this time, the blind is located at the uppermost limit, and at the same time when the upper limit switch 16 is input, the MPU 34 initializes the height data and sets this position as the upper limit value.

Next, when the descent switch 23 of the controller 2 is input, the blind starts descent. At the same time as the descent starts, the photo interrupter 38 inputs an intermittent signal to the MPU 34 through the slit 373 provided in the winding drum 37. The MPU 34 knows the number of rotations of the winding drum 37 by counting the intermittent signal, and knows the amount of drop (height) of the blind. It is visually confirmed that the blind height has dropped to the desired lower limit, and the stop switch 22 provided on the controller 2 is input. Upon receiving this input, the MPU 34 stops the geared motor 4 via the motor drive circuit 33 (brake mode). The blinds stop.

At this time, the MPU 34 stores the count number of the intermittent signal from the photo interrupter 38 in the RAMA. After confirming that the blinds are at the desired lower limit, the stop switch 22 provided on the controller 2 is first pressed, and then the down switch 23 is simultaneously input for an arbitrary set time (for example, 2 seconds).
Receives this input and sets the current blind position as the lower limit and sets the above count number as the lower limit A to the RAM.
Store it in B.

The reason why the stop switch 22 is first inputted first is as follows. As soon as another switch (elevation, opening / closing angle) is input, the blind operates according to the input. To prevent this, first stop switch 2
If 2 is input and then the down switch is input, the blind will not operate. While the stop switch 22 is being input, the blind does not operate even if other switches are input. (The geared motor 4 remains stopped).

In this state, when the blind is raised by operating the raising switch 21 of the controller 2, the MPU 34 counts the intermittent signal from the photo interrupter 38,
The height from the upper limit position is always calculated, and the count number of the intermittent signal from the upper limit position is stored in the RAMA. When the stop switch 22 is operated to stop the blind, and then the descent switch 23 is operated to lower the blind, the intermittent signal from the photo interrupter 38 is counted from the position, and the height is calculated from the upper limit position. Are sequentially stored in the RAMA.

The intermittent signal corresponding to the height from the upper limit position is counted, and RAMA is compared with RAMB. Then, the geared motor 4 is stopped (brake mode) via the drive circuit 33.
The blind is stopped, and the blind is stopped at the lowest position by the simultaneous operation of the stop switch 22 and the descent switch 23 from the controller 2.

The lowermost position set by the controller 2 by the simultaneous operation of the stop switch 22 and the descent switch 23 is released by the simultaneous operation of the stop switch 22 and the ascent switch 21. That is, RAMB is erased. In this case as well, the stop switch 22 is input first, and then the up switch 21 is input. The lower limit at this time depends on the setting position of the lower limit switch 42. With the same concept, the angle of the blades can be simultaneously stored in the controller 2 by simultaneously inputting the open switch 24 and the stop switch 22 provided in the controller 2 to store the current blade angle. By inputting, the memory of the blade angle can be erased, and it is easy to always set the blade angle to a constant value after ascending and descending. However, when changing the lower limit value of the blind, the controller 2
After the stop switch 22 and the up switch 21 are simultaneously inputted for an arbitrary time, the RAMB storing the lower limit value A is erased, and the blind is raised or lowered to the changed position. What is necessary is just to input the descent switch 23 simultaneously. The position of the blind is newly stored in RAMB, this value becomes the new lower limit A, and when the blind is lowered thereafter, if the new lower limit A matches RAMA, the blind stops at the lower limit. Will be.

[0043]

As described above, according to the present invention, since the blind lowering position height setting means is provided in the command means such as the controller, the command means such as the controller distant from the headbox provided at a high place is provided. The height of the blind drop position can be set at the position. In addition, the setting of the height of the descending position can be performed extremely easily and reliably by simultaneous operation such as stopping the command means and descending.
Therefore, the height of the blind can be easily adjusted even after the electric blind is attached to the window frame. In addition, there is an effect that the change can be easily made even after setting once. As a result, the workability at the time of construction and the workability at the time of assembling the blinds are remarkably improved, and the omission or combination of the lower limit switches can be reduced. that Do and can also be
There is an effect. In the conventional configuration, the blind moves up and down.
When you perform the operation, the blades perform the closing action, and then
Each desired blade angle from the command means
It is necessary to reset the settings every time.
If the root angle is stored in the storage means,
Only the closing operation can be adjusted to the desired blade angle
Thus, the operation can be simplified. Moreover, the command means
Open / close operation at a desired angle and stop at a desired angle.
Arbitrary time determined simultaneously for stop button and wing open button
(2 seconds in the present invention) to change the angle of the blade
You can set the desired angle. Plus, the subsequent brie
After raising and lowering the command, perform the open button operation of the wing of the command means.
However, it will stop at the desired blade angle,
It is easy to stop the blade at the blade angle. further,
To release this set angle, stop button and close button
Can be easily released by inputting
There is an effect that it becomes possible.

[Brief description of the drawings]

FIG. 1 is a flowchart for explaining a specific operation of an embodiment of the present invention.

FIG. 2 is a diagram showing an outline of an embodiment of the present invention.

FIG. 3 is a diagram illustrating a main part of a blind winding mechanism.

FIG. 4 is a schematic block diagram of an embodiment of the present invention.

[Description of Signs] 2 Controller 3 Control Unit 4 Geared Motor 6, 7, 8 Lifting Unit 10 Lifting Tape 11 Rudder Coat 12 Lifting Shaft 13 Slat 14 Bottom Rail 33 Motor Drive Circuit 34 Microcomputer 37 Winding Drum 38, 41 Photointerrupter 39 Rudder drum 42 Lower limit position setting switch

Claims (1)

[Claims] 1. An electric blind for raising and lowering a blind according to rotation of an electric motor, comprising: command means for commanding the blind to move up, down, or stop; and a plurality of blades connected by a string-shaped member. A head box that houses a drum for rotating in accordance with the rotation of the electric motor and the electric motor, winding the cord-shaped member, or rewinding to raise and lower the blind;
A connection means for connecting the head box and the command means, provided in the command means, for setting and canceling a lowermost lower limit position where the blind descends after a stop operation. Lower limit position setting release means, and transmission / reception of lower limit position setting and release signals provided in the connection means for setting and releasing the lowermost position at which the blind descends between the command means and the headbox. A blind position detecting means provided in the head box, for detecting an ascending / descending position of the blind in accordance with the rotation of the drum; and an ascending or descending command from the command means. A microcomputer that calculates the position of the blind based on a signal from the position detecting means, and a rewrite that sequentially stores data of the position And a microcomputer which calculates the position of the blind by a signal from the lower limit position setting canceling means for setting and canceling a lower limit position where the blind descends, and sequentially stores the positions. The height data of the rewritable memory (PRAM) area is transferred to the rewritable memory (PRAM) area for storing the data at the lowest position of the microcomputer, and the lowest position is transferred to the rewritable memory (PRAM) area. Rewritable memory (PRAM) for storing data
Area and two storage areas (memory areas A and B)
Based on a signal from the blind position detecting means for detecting the elevation position, storing the signal in a rewritable memory (PRAM) area of a microcomputer for calculating the position of the blind, and The value stored in the rewritable memory (PRAM) area is the value of the lower limit position of an arbitrary position set by a signal from the lower limit position setting canceling means for setting and canceling the lowermost position at which the lower limit is lowered. (Data) and the value (data) of the lowermost position stored in a rewritable memory (PRAM) area of the microcomputer.
And a determining means for determining whether the values match each other, and in response to a descent command from the command means, rotating the electric motor and rewinding the string-shaped member by the drum to remove the blind. The discrimination means transfers the data to the rewritable memory (PRAM) area for storing the value (data) of the lowermost position of the microcomputer and stores the data of the lowermost position in the rewritable memory (PRAM) area. Control means for stopping the electric motor in accordance with the determination that the lower limit position has been reached. An electric blind lowering height setting device for setting and changing the lower limit of the setting canceling means.