JPH08210058A - Device for setting lowered height of motor-driven blind - Google Patents

Abstract

PURPOSE: To stop a blind in a set lower-limit position by counting pulse signals which are issued according to the rotation of a drum when the blind is lowered. CONSTITUTION: A blind is lowered by rotation of an electric motor 4, a take-up drum 37 rotates, the number of pulses from a rotation detecting portion comprising a slit 373 and a photointerrupter 38 is counted, and the lowered height is detected by an MPU 34 according to the number of pulses counted from an upper-limit position. When a lower-limit setting signal is input to the MPU 34 as a lower-limit setting position, the number of pulses at that time is stored in a lower-limit setting position storage RAM 70, and then even if the blind is raised with a subsequent command to raise it, the MPU 34 constantly finds the height from the upper limit position by counting the number of pulses from the photointerrupter 38 and then performing arithmetic. Also in a lowering operation the number of pulses for the lower-limit setting portion is compared with the number of pulses for the current position, and if the numbers of pulses are coincident the MPU 34 recognizes the lower limit set value and them stops lowering the blind.

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 that can easily specify and cancel the descent position of the blind. is there.

[0002]

2. Description of the Related Art A conventionally proposed device for setting a descent height of an electric blind is composed of a speed reducing mechanism that applies rotation of a lifting shaft and a cam. That is, the rotation speed of the lifting shaft is reduced to open and close contacts such as a micro switch linked with a cam to stop the electric motor. When changing the descent height, adjust the screwed bolt of the cam that turns on and off the micro switch in the speed reduction mechanism, which causes the motor to stop early or late, resulting in 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 by the electric blind, the position of the descent height is set by adjusting the position of the cam. It was necessary to install it on the window frame to lower the blind, attach it to the blind according to the height of the window frame, and adjust the cut-and-try method while operating the electric blind on site. For this reason, there is a drawback that it takes a lot of time and labor to adjust the attachment to the window frame. In addition, the friction state and position of the cam change due to long-term use and changes over time, and the descending height changes, and it is necessary to manually adjust the descending height each time, and the cam, gear, or screw bolt However, the combination mechanism is complicated and the cost is high.

Therefore, a main object of the present invention is to provide a descent height setting device for an electric blind which can eliminate the 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.
The descent position height setting means of the electric blind is provided in the command means such as a wireless remote control transmitter provided separately from the blind body, and the descent position height is set from the command means such as the remote control transmitter. Can be achieved by doing.

That is, the descending height setting device for an electric blind according to the present invention is an electric blind that raises and lowers the blind according to the rotation of the electric motor, and includes a plurality of blades connected by a string-like member, the electric motor, and The blind body is rotated according to the rotation of the electric motor to wind or unwind the cord-like member to house a drum for raising and lowering the blind, and a blind main body, and the blind main body is separated. Command means for providing a command to raise or lower or stop the blind by a wireless remote control means and a command signal from the command means, and to transmit the received signal to the head box. It is provided in the receiving means and the command means, and by simultaneously inputting the command means such as lowering and stopping, the blur Lower limit position setting means for setting the lower limit position in order to set the lower limit position of the wind drop to an arbitrary position, and a pulse which is provided in the head box and generates a pulse signal according to the rotation of the drum. A pulse signal generated from the signal generating means and the pulse signal generating means in response to an ascending or descending command from the commanding means is counted, and the pulse count value at any position set by the lower limit position setting means can be rewritten. Storing means for storing, judging means for counting the pulse signals generated from the pulse signal generating means, and judging whether or not the counted value coincides with the value set by the lower limit position setting means, and the command In response to a signal received by the receiving means in response to a descending command from the means, the electric motor is rotated to rewind the string-like member by the drum. And a control means for stopping the electric motor in response to the judgment means determining that the count value matches the value set and stored by the lower limit position setting means. .

In the descent height setting device of the electric blind according to the present invention, the descent height is set by the wireless command means provided separately from the blind body, and the command signal from the command means is received. The pulse signal transmitted to the blind through the blind is counted according to the rotation of the drum when the blind is lowered, and the count value corresponding to the descent height of the blind coincides with the preset lower limit position. In that case, since the descent of the blind is stopped, complicated adjustment work can be eliminated, and the descent position of the blind can be set from the wireless remote operation command means in correspondence with an arbitrary window frame.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As means for solving the conventional problems, for example, a head box for accommodating a blind raising / lowering device, a command means for instructing the raising or lowering of the blind, and a head box. In an electric blind, which is provided below the and includes a plurality of blades connected by a string-like member, the blind is provided in the head box and rotates according to the rotation of the electric motor to wind or rewind the string-like member. A drum for raising and lowering the blind, a pulse signal generating means for generating a pulse signal according to 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, , The generated pulse signals are counted, and it is determined whether or not the count value matches the value set by the lower limit position setting means. It is determined that the count value matches the value set by the lower limit position setting means by rotating the electric motor in response to the lowering command and rewinding the string-shaped member by the drum to lower the blind by another means. It is conceivable that the control means is configured to stop the electric motor according to the above.

However, in the lower limit position setting means for the electric blind as described above, a lower limit setting switch is provided in the control section built in the head box, and the lower limit of the lowering of the blind is set by the combination of these switches. For this setting, the switch combination is appropriately selected at the factory according to the height of the window to be installed, and it is adjusted to the height to the window. However, if the window height is set incorrectly or the blind lower limit setting switch is set incorrectly, the blind will not be able to reach the bottom of the window frame after it is attached to the window, and a gap will be created at the bottom of the window frame. However, problems such as loosening of the entire blind occur. In order to correct this, it is necessary to change the setting of the lower limit setting switch and set it again at the installation site so that it is located at the height of the installed window.

However, the lower limit setting switch is provided in the control section in the head box. Therefore, the work of resetting the lower limit setting switch is very poor because the head box is above the window etc.
The work efficiency is significantly reduced in a place where many blinds are installed such as a conference room. In addition, after installing blinds, if you follow other objects such as potted plants in the lower part of the window frame, in order to prevent the lower part of the blinds from hitting these when lowering the blinds, the descending state of the blinds every time you lower it. It is necessary to stop the descent of the blind while watching, or reset the lower limit setting switch as described above. However, it is generally necessary to ask the construction company that installed the blinds to reset this setting.

Summarizing the above problems, the above-mentioned electric blind lowering position setting device has the following problems.

(I) After installing the blind on the window or the like, it is not possible to easily change the lower limit setting switch provided in the control section in the head box because the work efficiency in construction is extremely poor.

(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, which increases the number of lower limit switches, resulting in an increase in cost. Moreover, the setting operation becomes complicated.

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

First, referring to FIGS. 1, 2 and 3,
The external configuration of the embodiment of the present invention will be described.
FIG. 1 is a diagram showing a main part of a winding mechanism for an electric blind according to the present invention, and FIG. 2 is a diagram showing an electrical configuration for explaining a lower limit position setting method for an electric blind according to the present invention. FIG. 3 is a perspective view for explaining the details of the blind winding mechanism.

The electric blind according to the present invention includes a slat 13, a head box 15 in which a device for vertically driving the slat 13 is housed, a controller 2 for controlling the up and down of the slat 13, and a slat up / down command. And an infrared remote control transmitter 60 for The head box 15 is a lifting unit 6, 7, 8 for moving the lifting tape 10 up and down to raise and lower the slats 13, a geared motor 4 for rotating the lifting unit, and a control unit for controlling the 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 slats 13, a stop switch 22 for stopping the movement of the slats, a lowering switch 23 for lowering the slats 13, an opening switch 24 for opening the slats, and a slats. Closing switch 25 for closing the
And a receiver 69 for receiving an infrared signal from the infrared remote control transmitter. It should be noted that the receiving unit 69 does not have to be built in the controller 2, and may be externally provided separately from the controller 2. The receiving unit 69 is connected to the control unit 3 by a wiring system different from the switches 21 to 25. The power cord 1 and the controller 2 are connected to the control unit 3. The control unit 3 includes a microcomputer (hereinafter abbreviated as MPU) 34, a power supply unit, and the like.

There are various known configurations of the receiving section 69, and therefore detailed description thereof will be omitted. As a function, an infrared signal sent from the remote control transmitter 60 (generally 38 kH
Pulses are modulated by a remote control signal using a frequency such as z as a carrier. ) Is received, the modulated infrared signal is demodulated and is returned to the remote control signal. This remote control signal is input to the MPU 34. The MPU 34 takes in the remote control signal, decodes the command signal from the remote control transmitter 60, and controls the blind in accordance with the command. The remote control transmitter 60 includes five operating switches, an ascending switch 64, a stopping switch 65, a descending switch 66, and an opening switch 67 and a closing switch 68 of the slats.

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 the elevating shaft 12 via the coupling 5. Lifting units 6, 7, and 8 are connected to the lifting shaft 12. 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 to the geared motor 4 and a connection cord 20 to the controller 2. The lifting units 6 and 8 include a take-up drum 37 and a ladder drum 39, and the lifting unit 7 includes only the ladder drum 39.

A lifting tape 1 is attached to the winding drum 37.
One end of 0 (which may be a string-like one) is fixed. The other end of the lifting tape 10 penetrates through the holes 13a of the plurality of slats 13 and the bottom rail 14
It is fixed to. Then, the winding drum 37 winds or unwinds the lifting tape 10 in accordance with the rotation of the elevating shaft 12, and raises and lowers the slats 13 and the bottom rail 14. 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 made up of a pair of two slats 11a and 11b at intervals corresponding to the width of the slats 13 of, for example, 50 mm, 25 mm or 15 mm. The slats 13 are connected by a horizontal cord 11c at intervals corresponding to the pitch p of the slats 13, for example, like a ladder. The slats 13 are inserted and held in a ladder-shaped space formed by the ladder cords 11a and 11b and the lateral cords 11c. Then, the ladder drum 39 rotates with the rotation of the elevating shaft 12, and controls the opening degree of the slat. The bottom rail 14 functions as a weight for lowering the blind and a weight for preventing the blind from swinging 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 constitute a head box 15 which constitutes an outer box.
Is covered by. An upper limit switch 16 is provided below the head box 15, and the upper limit switch 16 is used when the blind is wound up.
It is pressed by 3 and operates to detect the upper limit position.
The upper limit switch 16 may be composed of an electronic switch such as an optical sensor.

Next, with reference to FIG. 2, an electrical configuration of an embodiment of the present invention will be described. Power transformer 31
AC power is input to the power supply via the power cord 1. The power supply transformer 31 steps down the input AC power supply and supplies a low voltage to the stabilized power supply unit 32, thereby creating the power supply required for the control unit 3 and geared mode 4. A motor drive circuit 33 is connected to the MPU 34, and controls the geared motor 4 in the normal rotation, the reverse rotation, or the brake mode 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 the input terminals of the geared motor 4 in this way, the geared motor 4 is You can brake on. That is, for example, when mechanical force is 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 of artificial descent, the geared motor 4 operates according to the principle of the DC generator. Will generate a back electromotive force.

Therefore, by short-circuiting the input terminals, a current for causing this rotation to be stopped, 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 through the transformer 31 on the low voltage side.

The MPU 34 includes a RAM 70 for setting the descent position of the electric blind, which will be described later. RAM
70 is a part for storing the descent position height of the blind input from the remote control transmitter 60.

The obstacle switch 36 is built in the elevating units 6 and 8, 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 is stopped.
As the descent continues, the lifting tape 10
When the lifting tape 10 is loosened and further continued, the lifting tape 10 deviates from the winding drum 37, and the lifting tape 10 cannot be wound even if the blind is raised next time, resulting in a serious failure.

In order to prevent this, the looseness of the lifting tape 10 is detected by a mechanical switch or an optical or magnetic sensor as a conventional technique, and the detection output is input to the MPU 34 and the motor drive circuit 33 is used. The geared motor 4 is stopped. As a result, the motor drive circuit 33 is set to the brake mode. In addition, the MPU 34 reverses the geared motor 4 for an arbitrary time and winds the blind to remove the lifting tape 10 from looseness, and then stops the geared motor 4.

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, and includes guides 371 and 372 of the lifting tape 10. Further, for example, a slit 373 is provided around the guide 371.
Are formed. A disc may be attached to the other part of the lifting shaft 12 separately from the winding drum 37 to form a slit in the disc.
Alternatively, even if the rotation of the motor shaft of the geared motor 4 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. The photo interrupter 38 optically detects the connection / 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 is the winding drum 37.
The amount of lifting or lowering of the lifting tape 10 can be known by the rotation of the 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 input amount of external light.
The room is made to have an appropriate brightness and the outside light is blocked.

The ladder drum 39 is fitted in a frictional state through a drum shaft 40 penetrating 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. As the rudder drum 39 rotates about half a turn, the slats 1
3 rotates, and the angle of the slats 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 and is opened, and then a state in which it is slanted to the outdoor side and is closed. When the elevating shaft 12 rotates in the direction opposite to that described above, the rotation of the slat 13 is reversed. 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. This slit 391 is the ladder drum 39
The photo-interrupter 41 is provided at an angle corresponding to about half a rotation of 1 to detect the position of the slit 391. This 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 is composed of four switches in this embodiment.

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

FIG. 4 is a schematic block diagram showing an embodiment of the remote control transmitter 60. The operation of the remote controller will be described with reference to FIGS. 2 and 4. The remote control transmitter 60 includes a microcomputer 6 that creates a remote control signal according to inputs from the up switch 64, the stop switch 65, the down switch 66, the slat open switch 67, and the close switch 68.
1, an infrared light emitting section 63 which is a means for transmitting a signal generated by the microcomputer 61 as an infrared signal, and a power source section 6
Including 2 and. The carrier modulated by the remote control signal, for example 38 kHz, may be generated by the microcomputer 61 or the infrared light emitting unit 63 may have an oscillator. Either of them may be used. The power source 62 generally uses a dry battery.

Next, the operation of the remote control transmitter will be described. When the rising switch 64 of the remote control transmitter 60 is input, the microcomputer 61 receives the input and sends a rising signal to the infrared emitting section 63. The infrared light emitting unit 63 sends an infrared signal. This infrared signal is received by the receiving unit 69 provided in the controller 2 and demodulated, and the remote control signal is M
It is input to the PU 34. The MPU 34 decodes the signal, determines that it is a rising signal, and raises the slat 13 by a series of operations described below.

Similarly, the lowering switch 66 of the remote control transmitter 60, the slat opening switch 67, and the closing switch 6
When 8 is input, the microcomputer 61 sends the remote control signal according to each to the receiving unit 69 via the infrared light emitting unit 63. These signals are demodulated and then input to the MPU 34, which decodes these signals and controls the blind in accordance with their respective commands. To stop the operation of the blind, stop switch 65 of remote control transmitter 60
Is input, the MPU 34 decodes the stop signal and stops the operation of the blind through the same route as above.

Regarding the opening and closing of the slats, the following operations are performed. For example, the slat open switch 67 is input to adjust the slat angle. When the desired slat angle is reached, the open switch 67 is released and the stop switch 65 is input. As a result, the slat angle stops at the desired angle. However, if the slat opening switch 67 is released and the stop switch 65 is input to stop the operation of the slat after visually confirming that the desired slat angle has been reached, the following problems occur.

That is, from the visual confirmation, the stop switch 65
, And the microcomputer 61 sends a stop signal, and the MPU 34 decodes the stop signal through the infrared transmitter 63 and the infrared receiver 69 to stop the operation of the slat by an artificial time and microcomputer. There is a delay in processing time. As a result, it becomes difficult to match the desired slat angle. The slat operating time is fast and the slat does not stop at the desired slat angle.

In order to prevent this, if the inputs to the slat open switch 67 and the close switch 68 are released, the microcomputer may judge that these inputs are gone. The microcomputer 61 is programmed to send the stop signal as described above. By doing this, when the slat angle reaches the desired position, the slat opening switch 6
7 or the close switch 68 is released, the microcomputer 61 is immediately released.
Sends a stop signal. The stop signal is input to the microcomputer 61 via the infrared light emitting section 63 and the receiving section 69, is decoded, and the operation of the slat is stopped. The blind is stopped by the input of the stop switch 65 for rising and lowering.

Next, the specific operation of the electric blind according to the present invention will be described with reference to FIGS. When the power cord 1 is energized, the power transformer 31 converts the AC power into a low voltage and supplies it to the stabilized power supply 32. The stabilized power supply is the stabilized power supply V required for the control unit.
A power supply VM for driving cc and the geared motor 4 is produced. First, when raising the blind, the raising switch 64 provided on the remote control transmitter 60 is operated. The MPU 34 receives a signal from the raising switch 64 and gives an intermittent signal to the motor drive circuit 33 to close the slat 13.

In response to this, the motor drive circuit 33 intermittently rotates the geared motor 4. When the geared motor 4 is intermittently rotated, this rotational force intermittently rotates the lifting 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, if one of the ladder cords 11, for example, the ladder cord 11b side is wound while slowly rotating the ladder drum 39, the pair of ladder cords 11a is lowered. That is, the ladder drum 3
By rotating 9 in the direction of the arrow in FIG. 3, the ladder cord 11b side goes up and the 11a side goes down. As a result, the slat 13 rotates in the direction of the arrow and enters the closed state.

The ladder drum 39 rotates, the slit 391 provided in the ladder drum 39 interrupts the output signal of the photo interrupter 41, and the pulse signal becomes MPU.
34. The MPU 34 sequentially counts pulse signals when the ladder drum 39 further rotates, that is, when the slats 13 are gradually closed. When the ladder drum 39 rotates until the slat 13 is completely closed, a protrusion (not shown) provided on the ladder drum 39
Hits a protrusion (not shown), and the ladder drum 39 idles. Therefore, the pulse signal from the photo interrupter 41 is not given to the MPU 34. According to MPU
34 determines that the slats 13 are closed. Further, the MPU 34 is the raising switch 6 of the remote control transmitter 60.
After 4 is operated, the number of pulses of the pulse signal output from the photo interrupter 41 is counted, and the counted value is stored in the slat 13 as a movement angle in a memory (not shown).

Next, the MPU 34 is connected to the photo interrupter 4
When the pulse signal from 1 is not given, the 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 the blind winding operation.

That is, as the geared motor 4 continuously rotates, the winding drum 37 continuously rotates 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 portion of the slat 13. To stop the rising of the blind, the stop switch 65 provided in the remote control transmitter 60 is operated. The MPU 34 gives a stop signal to the motor drive circuit 33 in response to a command from the stop switch 65. In response, the motor drive circuit 33 stops the geared motor 4. At this time, the motor drive circuit 33
Causes the input terminal of the geared motor 4 to be short-circuited, and the geared motor 4 is braked and stopped. Since this is a well-known technique, its detailed description is omitted.

Next, as described above, the MPU 34 returns to the angular position of the slat 13 stored in the MPU 34.
Reference numeral 34 gives an intermittent signal for reverse rotation to the motor drive circuit 33 to reversely rotate the ladder drum 39 in the direction opposite to the arrow shown in FIG. As a result, the ladder cord 11 performs an operation opposite 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 photo interrupter 41, and if it matches the count value input at the time of ascent, the MPU 34 gives a signal for stopping the geared moat 4 to the motor drive circuit 33, and the geared motor. Stop 4 As a result, the blinds stopped and slats before the climb 13
The angle is automatically adjusted.

The operation for lowering the blind is performed by operating the lowering switch 66 provided on the remote control transmitter 60. The descent of the blind is performed by performing an operation substantially opposite to the above-described ascent. When the stop switch 65 of the remote control transmitter 60 is operated, the geared motor 4 is stopped and the blind is stopped at that time. Further, the angle of the slat 13 is automatically adjusted to the angle before descending in the same manner as described above.

Although the above-mentioned operation is performed from the switch provided in the remote control transmitter 60, since the controller 2 has the same switch, it can be performed from the controller 2 as well.

Next, a method of setting the descent height of the blind will be described. The setting of the descent height of the blind according to the present invention is performed by using various switches provided in an infrared remote control transmitter which is separated from the blind main body. Not only this descent position setting method, but also the setting by the dip switch described in the prior art may be used together.

5 and 6 are flowcharts showing the procedure for setting the lower limit position of the electric blind according to the present invention. FIG. 5 is a flowchart showing the operation of the MPU 34, and FIG. 6 is a flowchart showing the operation of the mokon transmitter 60. The lower limit position setting procedure of the electric blind according to the present invention will be described with reference to FIGS. 5 and 6.

First, the raising switch 6 of the remote control transmitter 60
4 or the descent switch 66 is input to adjust the blind to the desired height, and the stop switch 65 is input to stop the blind. Next, the stop switch 65 and the lowering switch 66 are simultaneously input for a predetermined fixed time. Microcomputer 61
After this simultaneous input continues for a certain fixed time,
Send the lower limit setting signal. The lower limit setting signal is sent from the infrared light emitting unit 63 as an infrared remote control signal, is received by the receiving unit 69, is demodulated, and the lower limit setting signal is the MPU 34.
Is input to The MPU 34 decodes this signal and stores the current height in the lower limit setting position storage RAM 70 as the lower limit setting position.

The current height of the blind is the upper limit switch 1
6 is detected by detecting the descent height of the blind from the input position by the method described below. The rotation of the electric motor 4 lowers the blind. The elevating shaft 12 rotates, and the winding drum 37 also rotates. The number of pulses from the rotation detection unit configured by the slit 373 provided on the winding drum 37 and the photo interrupter 38 is counted. The descent height is detected by the MPU 34 by counting the number of pulses from the upper limit position. As the lower limit setting position, the lower limit setting signal is MPU
34, the MPU 34 stores the lower limit setting position memory R
The number of pulses at that time is stored in the AM 70. After that, even if the blind for which a rise command has been issued rises, the MPU 34 always knows the height from the upper limit position by counting and calculating the number of pulses from the photo interrupter 38. To stop the rising of the blind, the stop switch 65 of the remote control transmitter 60 is input. When lowering the blind, the lowering switch 66 is input. The MPU 34 counts and calculates the number of pulses from the photo interrupter 38. RAM of MPU34 by the above lower limit setting operation
The lower limit setting position stored in 70 is compared with the number of pulses at the current position. If the numbers of pulses match, the MPU 34 determines that it is the lower limit set value, and stops the descent of the blind. After that, even if the raising and lowering operation of the blind is performed, if the lower limit setting value is reached, the lowering of the blind is stopped.

Next, the cancellation of the lower limit position setting of the electric blind according to the present invention will be described. To set the lower limit position,
As described above, when the lower limit setting position is released, the stop switch 65 and the raising switch 64 are simultaneously set, or the raising switch 64 is arbitrarily set within a preset time after the stop switch 65 is input. Enter the time continuously. In response to this simultaneous input signal, the microcomputer 61 sends a lower limit cancellation signal. This lower limit cancellation signal is sent out via the infrared sending unit 63. This infrared signal is received by the receiving unit 6
9 received and demodulated, the lower limit release signal is MPU3
4 is input. The MPU 34 clears the storage of the lower limit setting position by the operation stored in the lower limit setting storage RAM 70 by this lower limit release signal. As a result, the setting of the lower limit position is canceled.

[0054]

As described above, according to the present invention, since the blind descending position height setting means is provided in the command means such as a wireless remote control transmitter which is provided separately from the blind body, the height is high. It is possible to set the descent position height of the blind at the position of the command means such as a wireless remote control transmitter, which is separated from the head box provided in. Moreover, the setting of the descending height can be performed extremely easily and surely by simultaneously inputting the descending and stopping of the command means. Therefore, even after the electric blind is attached to the window frame, the descent height of the blind can be easily adjusted. Moreover, there is an effect that it is possible to easily change even after setting once. As a result, workability during construction and workability during blind assembly are significantly improved, omission or combination of lower limit switches can be reduced, complexity of lower limit switch settings and setting errors can be prevented, and cost is also reduced. There is also an effect such as possible.

[Brief description of drawings]

FIG. 1 is a diagram showing a main part of a blind winding mechanism according to an embodiment of the present invention.

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

FIG. 3 is a view showing a blind winding mechanism.

FIG. 4 is a diagram showing a main part of a remote control transmitter.

FIG. 5 is a flowchart showing a lower limit position setting procedure of the electric blind according to the present invention.

FIG. 6 is a flowchart showing a lower limit position setting procedure of the electric blind according to the present invention.

[Explanation of symbols]

 2 Controller 3 Control Unit 4 Geared Motor 6, 7, 8 Lifting Unit 10 Lifting Tape 11 Ladder Code 13 Slat 14 Bottom Rail 33 Motor Drive Circuit 34 MPU 37 Take-up Drum 38, 41 Photo Interpla 39 Ladder Drum 42 Lower Position Setting Switch 60 remote control transmission unit 61 microcomputer 62 power supply unit 63 infrared light emission unit 64, 65, 66, 67, 68 operation switch 69 reception unit 70 lower limit position setting RAM

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[Procedure amendment]

[Submission date] January 17, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

That is, the descending height setting device of the electric blind according to the present invention is an electric blind which raises and lowers the blind according to the rotation of the electric motor, and includes a plurality of blades connected by a string-like member, the electric motor, and The blind body is rotated according to the rotation of the electric motor to wind or unwind the cord-like member to house a drum for raising and lowering the blind, and a blind main body, and the blind main body is separated. Command means for providing a command to raise or lower or stop the blind by a wireless remote control means and a command signal from the command means, and to transmit the received signal to the head box. It is provided in the receiving means and the command means, and by simultaneously inputting the command means such as lowering and stopping, the blur And the lower limit position setting means for setting the lower limit position to descend to the lower limit position of the command to be set at any position, provided in said head box, the signal for detecting the vertical position in response to rotation of the drum a lift signal generating means for generating a, that occur from the lifting signal generating means according to the command of rise or fall from the command means
Counting the signal, storage means for rewritably storing a signal count at any position set by the lower limit position setting means counts the signals generated from the lift signal generating means, the count value Is determined by the lower limit position setting means to determine whether or not it coincides with the value set by the lower limit position setting means, and the descending command from the commanding means causes the electric motor to rotate according to the signal received by the receiving means. The drum is rewound by the drum to lower the blind,
And a control unit for stopping the electric motor when the determination unit determines that the count value matches the value set and stored by the lower limit position setting unit.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

In the descent height setting device for an electric blind according to the present invention, the descent height is set by a wireless command means provided separately from the blind body, and a command signal from the command means is received. The signal transmitted to the blind through the blind is counted, and the signal for detecting the ascending / descending position generated according to the rotation of the drum when the blind is lowered is counted, and the count value corresponding to the descent height of the blind is set to the lower limit. Since the descent of the blind is stopped if it coincides with the position, complicated adjustment work can be eliminated, and the descent position of the blind can be set from the wireless remote-controlled command means in correspondence with any window frame. it can.

Claims (1)

[Claims] 1. An electric blind that raises and lowers a blind according to the rotation of an electric motor, comprising a plurality of blades connected by a string-shaped member, and rotating according to the rotation of the electric motor and the electric motor,
A blind main body including a head box that houses a drum for winding or unwinding the string-shaped member to raise and lower the blind, and the blind main body, which is provided separately from the blind main body, and is operated by a wireless remote control unit. Commanding means for commanding rising or lowering or stopping of the blind, receiving a command signal from the commanding means, and receiving means for transmitting the received signal to the head box, provided in the commanding means, Lower limit position setting means for setting the lower limit position for setting the lower limit position of the blind to an arbitrary position by simultaneous input such as lowering and stopping of the commanding means, and provided in the head box. A pulse signal generating means for generating a pulse signal in response to the rotation of the drum; A storage unit that counts the pulse signals generated from the pulse signal generation unit according to a descending command, and rewritably stores the pulse count value at any position set by the lower limit position setting unit, and from the pulse signal generation unit. Discriminating means for counting the generated pulse signals and discriminating whether or not the counted value coincides with the value set by the lower limit position setting means, and the receiving means receives the descending command from the commanding means. In response to the signal, the electric motor is rotated to rewind the string-like member by the drum to lower the blind, and the count value is matched by the determination means with the value set and stored by the lower limit position setting means. A descent height setting device for an electric blind, comprising: a control unit that stops the electric motor in response to the determination that the electric motor is operated.