JPH0696931B2 - Electric blinds - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric blind, and in particular, a plurality of blinds are provided in each of a plurality of zones, and one blind among a plurality of blinds included in each zone. As the base unit, and the remaining blinds as the base unit,
The present invention relates to an electric blind that raises and lowers blinds and opens and closes blades included in each zone or in all zones.

[Prior Art] In a conventionally proposed system-configured electric blind, a relay for controlling ascent, descent and stop is provided inside a head box or the like to configure a control device. The respective relays are connected in parallel to form a system, and these are connected to switches as command means corresponding to rising, stopping and descending, respectively.

On the other hand, in some buildings, rooms are divided into zones, and when a blind is installed in a window belonging to each zone, the system configured as described above is installed by the number of required zones.

[Problems to be Solved by the Invention] In the conventional electric blind configured as described above, it is necessary to connect a relay or the like provided inside the head box or the like in parallel between the electric blinds.
Such wiring is complicated and requires a great deal of time and money for construction. Further, a relay corresponding to each of rising, stopping, and descending is required, and the cost of the electric blind is increased and the work of assembling and wiring the relay is complicated.

Further, since the conventional electric blinds are respectively connected in parallel, when a command is given from the command means, even if the blinds can operate in conjunction with each other, the blinds are raised, stopped and lowered. I couldn't. If it is possible to individually raise, stop, and descend, a plurality of command means for each electric blind is required, and it is necessary to connect the electric blinds corresponding to each command means. Wiring work becomes more complicated, construction costs become higher,
The number of construction days also requires many periods. In addition, the conventional electric blind wiring system uses a high-voltage power supply such as a commercial power supply, which requires special consideration for withstand voltage and safety, which makes it difficult to perform electrical work. Even in this case, the cost was high. In any case, the conventional electric blind is expensive and has been an obstacle to its popularization.

Therefore, the main object of the present invention is to reduce the wiring work and shorten the construction period, and at the same time, it is inexpensive and can control all the zones and blinds in all zones at once. To provide blinds.

[Means for Solving the Problems] The present invention defines one of the blinds in each zone as a master unit and the rest as slave units, and targets the individual zones or all zones, collectively or individually. Is provided with a command means for outputting a signal for commanding the raising and lowering of the blinds and the opening and closing of the blades of the master unit and the slave unit as a code signal for each zone or each device.

On the other hand, the master unit receives the command signal from the command unit, and a unit and a device for commanding the raising and lowering of the blinds and the opening and closing of the blades collectively or individually in the zone corresponding to the received command signal. Based on the master unit determining means for determining whether or not the code is a different code, and a code that is an individual lifting command or a collective lifting command of the master unit in the zone is determined, When it is determined that the code is a code for the master unit lifting / lowering means for lifting / lowering the blind and the master unit's individual blade opening / closing command or the collective blade opening / closing command in the zone, the blind unit of the master unit is determined. A base unit opening and closing means for opening and closing the blades of
An up / down command signal and opening / closing command are issued in response to the code being the code for the collective blind up / down and opening / closing command in the zone or the blind up / down command of one of the slaves belonging to the zone. And a command signal output means for outputting a command signal to each slave.

On the other hand, each slave unit receives slave unit receiving means for receiving the code of the command signal output from the master unit, and whether or not the code of the received command signal is the code of the blind up / down and opening / closing command code for the slave unit. It is a cordless handset discriminating means for discriminating whether or not it is a cordless cord, and a cord for a blade opening / closing command and cordless cord raising / lowering command for raising / lowering the blind of the cordless handset. When it is determined that there is a child device, the child device opening / closing means opens / closes the blade of the child device.

[Operation] In the electric blind according to the present invention, in response to a command for raising or lowering the blinds and opening / closing of the blinds of the parent device and the child device collectively or individually for each zone or for all zones, the parent device If the code of the command signal is received and the code commands the lifting and opening / closing of the master unit collectively or individually in the zone to which the master unit belongs, the blinds of the master unit are lifted and the blades are opened and closed. If the code of is a collective or individual up / down command and opening / closing command for the slave units in the zone belonging to the master unit, the command signal is output to the slave units, and each slave unit outputs the blind to the slave unit. If the code is an up / down and open / close command, the blinds of the child device are moved up / down and the blades are opened / closed.

[Embodiment of the Invention] FIG. 1 is a diagram showing the entire configuration of an embodiment of the present invention, FIG. 2 is an external view of the blind controller shown in FIG. 1, and FIG. It is an external view of a controller.

First, the external structure of an embodiment of the present invention will be described with reference to FIGS. A plurality of blinds 11, 12, ... 1n are installed in a predetermined zone 1, the blind 11 is defined as a master unit, and the blind 12 ...
1n is defined as a child machine. The blind 11 of the master unit and the blinds 12 ... 1n of the slave unit are connected by signal lines 1S, respectively. A blind controller 5 is connected to each of the blinds 11, 12 ... 1n via a signal line 5a.

Similarly, blinds 21, 22 ... 2n are installed in the zone 2, the blind 21 is defined as a master unit, and the blinds 22 ... 2n are defined as slave units. The blinds 21, 22, ... 2n are connected by a signal line 2S, and the blind controller 5 is connected to each of the blinds 21, 22, ... 2n via a signal line 5a. Similarly, in the zone 3, blinds 31, 32 ... 3n are installed, the blind 31 is defined as a master unit, and the blinds 32 ... 3n are defined as slave units. And
3n are connected by a signal line 3S, and a blind controller 5 is connected to each of the blinds 31, 32, ... 3n via a signal line 5a. Further, a power supply line 6 is wired to each of the blinds 11, 12, ... 1n, 21, 22, ... 2n and 31, 32, ... 3n. Also, the blind 1 of each base unit
The zone controller 4 is connected to 1,21,31 via a signal line 4a.

In addition, depending on the direction of the windows in the room, for example, the east side is zone 1, the south side is zone 2, and the west side is zone 3 so that blinds are installed or a plurality of windows arranged in a line are blocked. Blinds may be installed separately, and zones 1, 2, and 3 may be set for each block.

The blind controller 5 is for individually instructing each blind to rise, stop and descend, or to open and close slats (blades), and as shown in FIG. 2, a raising switch for instructing the raising of the blinds. 7, a stop switch 8 for instructing the stop of the blind, a lower switch 9 for instructing the lowering of the blind, a slat angle switch 10 for closing the slat so that its inclined surface faces outward, and a slat. And a slat angle switch 11 for closing the slanted surface so that its inclined surface faces inward. The blind controller 5 does not necessarily have to be provided for each of the blinds 11, 12, ... 1n, 21, 22 ... 2n, 31, 32, ... 3n, but is provided only when it is necessary to operate each blind independently. You can do it like this.

The zone controller 4 interlocks the blind groups provided in each zone 1 to 3 with respect to each zone or all the thorns, or issues an ascending / descending / lowering or opening / closing of a slat for each zone and a set operation described later. Is a command means for. As shown in FIG. 3, the zone controller 4 includes a zone key 21, an all zone key 22, a ten key 23, an interlocking key 24, a clear key 25, an operation key 26, an angle adjusting key 27, and a set key. Including 28 and.

The zone key 21 designates any one of zones 1 to 3, and keys 211, 212, 213 are provided corresponding to each zone. In the example shown in FIG. 1, the number of zones is three, but if you want to increase the number of zones, you can increase the number of zone keys 21 to correspond to each zone. If the number is small, the number of zone keys should be small. Further, when only one zone is provided, it is possible to deal with it by using the all-zone key 22 described below. The all zone key 22 is for designating collectively controlling blinds included in all zones 1 to 3. If it is not necessary to divide zones 1 to 3, all zones may be zone 1, but all zones may be installed. In this case, it is not necessary to set the zone.

The numeric keypad 23 consists of numeric keys from 0 to 9,
It is provided to enter the device number of the blind. The interlocking key 24 is a command switch for interlocking and operating each blind forming the zone. Clear key
Reference numeral 25 is for clearing and resetting to the initial state when the input by the zone key 21, all zone keys 22 and ten keys 23 is incorrect. Action key 26 is up key 261, stop key 262
And up and down blinds, including and down key 263,
It is for commanding the descent. The slat key 27 is for adjusting the angle of the slat, and includes two keys 271 and 272. The key 271 is for adjusting the angle so that the slanted surface of the slat faces outward, and the key 272 is for adjusting the angle so that the slanted surface of the slat faces inward. The set key 27 corresponds to the height of the blinds 11, 21, 31 of the base unit and the current position of the slat angle, and the blinds 11… 1n, 21… 2n, 31… 3n of the handset belonging to each zone.
It is a key to operate so that

FIG. 4 is a diagram showing an electrical configuration of the blind controller, FIG. 5 is a schematic block diagram of the zone controller, and FIG. 6 is a block diagram of a control unit included in the electric blind.

Next, the electrical configuration of the embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 4, the blind controller 5 has an up key 7, a down key 9,
One end of each of the stop key 8 and the open / close keys 10 and 11 is commonly connected, and the other ends of the stop key 8 and open / close key 10 and 11 are independently connected, and the blinds 11, 12 ... 1n, 21, 22 ... 2n, 31, 32 ... It is connected to 3n by a signal line 5a.

As shown in FIG. 5, the zone controller 4 includes a microcomputer 29, a power supply section 30, and an output section 31, and the microcomputer 29 includes a zone key 21, an all zone key 22, a ten key 23, an interlocking key 24 and a clear key. 25, operation key 26, slat key 27, and set key 28 are connected. Then, the microcomputer 29 creates a command code according to the input from each of the keys 21 to 28, and outputs it via the output unit 31. This command code is connected to the blinds 11, 21, 31 of the master unit included in each of the zones 1 to 3 via the signal line 4a. The power supply unit 30 supplies power to the microcomputer 29 and the output unit 31, and receives power supply from the blinds 11, 21, 31 of any of the base units via the signal line 4a, and a required power supply voltage. Is producing.

Next, with reference to FIG. 6, the configuration of the control unit built in each blind will be described. The control unit includes a microcomputer 41, and this microcomputer 41 has
RAM411 is built-in. Also, a microcomputer
A height detector 421 is connected to 41, and a height encoder 42 is connected to the height detector 421. The height encoder 42 detects the current height of the blind, and detects the pulse signal according to the current height by the height detector 421.
Give to. The height detector 421 converts or pulse-shapes the pulse signal so that the pulse signal can be read by the microcomputer 41.

An angle detector 431 is connected to the microcomputer 41, and an angle encoder 43 is connected to the angle detector 431. The angle encoder 43 detects the angle of the slat, and supplies the detection pulse to the angle detector 431. The angle detector 431 processes the pulse signal and gives it to the microcomputer 41. Microcomputer
An upper limit detector 441 is connected to 41, and an upper limit switch 44 is connected to this upper limit detector 441. The upper limit switch 44 detects the upper limit of the blind, and its detection signal is given to the microcomputer 41 via the upper limit detection unit 441.

A failure detection unit 451 is connected to the microcomputer 41, and a failure switch 45 is connected to the failure detection unit 451. The obstacle switch 45 detects an obstacle when the blind is descending, and the detection signal is given to the microcomputer 41 via the obstacle detector 451.

The blind controller shown in FIG. 2 and FIG. 4 is connected to the blind controller input section 46, and the command signal from the blind controller 5 is input to the microcomputer 41 via the blind controller input section 46. Further, the blinds 11, 21, 31 of the master unit are provided with the zone controller input section 47, and the zone controller 4 shown in FIG. 3 and FIG.
Is connected to the zone controller input section 47. The command signal input from the zone controller 4 is input to the microcomputer 41 via the zone controller input section 47. The zone controller input section 47
Are not provided in the blinds 12 ... 1n, 22 ... 2n, 32 ... 3n of the child device.

Further, the blinds 12 ... 1n, 22 ... 2n, 32 ... 3n of the slave unit are provided with a connecting portion 48, and the connecting portion 48 has signal lines 1S, 2
Either S or 3S is connected. And the signal lines 1S, 2S, 3S
A command signal given from any of the above is input to the microcomputer 41 from the connection section 48 via the transmission data input section 481. In addition, the blinds 12… 1n, 22… 2n,
A connection portion 49 is provided at 32 ... 3n, and the signal lines 1S, 2S, 3S are also connected to this connection portion 49. A microcomputer 411 is connected to this connection unit 49 via a transmission data output unit 491.
Is output to other blinds as transmission data.

Further, a parent / child setting unit 50, a device number setting unit 51, a lower limit setting unit 52, and a motor control unit 53 are connected to the microcomputer 41. The parent / child setting unit 50 is for setting whether the corresponding blind is a parent device or a child device. The device number setting unit 51 sets the device number of the blind, but in the case of the master unit, the zone number is set instead of the device number. The lower limit setting unit 52 sets the lower limit position of the blind. The motor control unit 53 sets the motor 54 for raising, lowering, stopping, or adjusting the slat angle to the normal rotation, reverse rotation, or brake mode based on the output signal from the microcomputer 41. A predetermined power supply voltage is supplied from the power supply 55 to the microcomputer 41, the motor controller 53, and the motor 54. The power supply voltage from the power supply unit 55 is also supplied to the zone controller 4 via the signal line 4a.

FIG. 7 is a diagram for explaining a code included in the command signal output from the control unit. In FIG. 7, the command code is a start bit S, a transmission / controller discrimination code R, a zone code Z, an operation code C, and an operation auxiliary code.
Cs, device code U, set operation discrimination code K, and parity check code B are included. The start bit S defines the start of the command code, and the transmission / controller discrimination code R is a signal for transmitting the command code from an arbitrary blind (master device) to another blind (slave device). It is a code for determining whether it is a command signal from the zone controller 4. That is, when the transmission / controller discrimination code R is "1,1", it indicates that it is a command signal from the zone controller 4, and "0,
When it is 0 ", it indicates that it is a command signal from the master unit to the slave unit.

The zone code Z is a code of the zone number and all zones. The operation code C is a code indicating ascending, stopping, descending and adjusting the angle of the slats. The movement auxiliary code Cs is a code of slat angle data. The equipment code U represents a blind equipment number. The set operation code K is a command code for causing the set operation, that is, the heights and slat angles of the blinds 11, 21, 31 of the master unit to coincide with the other slave unit blinds 12 ... 1n, 22 ... 2n, 32 ... 3n. The parity check code is a code for checking the correctness of the command code.

FIG. 8 is a flow chart for explaining the operation of the zone controller, FIG. 9 is a flow chart for explaining the operation of the control unit included in the blind of the base unit, and FIG. It is a flowchart for demonstrating operation | movement of the control part contained in a blind.

Next, the specific operation of the embodiment of the present invention will be described with reference to FIGS. First, the parent / child setting unit 50 of the control unit included in each of the blinds 11, 21, 31 of the parent device is operated to set that each is the parent device, and the blinds 12 ... 1n, 22 of the child device. ... 2n, 32 ... 3n are set to be slaves. In addition, the device number setting section 51
To set the zone numbers 1 to 3 for the blinds 11, 21, and 31 of the master unit, and the device numbers for the blinds 12 ... 1n, 22 ... 2n, 32 ... 3n of the blinds of the slave unit. To set.

Next, the zone controller 4 is operated. That is, for example, the key 21 for designating zone 2 of the zone keys 21.
Operate 2 and then operate the numeric keypad 23 to input the number of the blind to be operated. For example, for the 16th blind, enter from the ten-key pad 23. next,
When the operation key 26 is operated to lower the blind, the lowering key 263 is operated. Then, when it is desired to stop at the desired position, the stop key 262 is operated. When it is desired to raise the blinds in zone 2 all at once, the key 212 of the zone key 2 is operated, the interlocking key 24 is operated, and then the elevation key 261 is operated. Also, if you want to close the slat angles of the blinds in all zones, that is, to close the slats so that the slanted surface faces outward, operate all zone keys 22, then operate interlocking key 24, and operate slat key 271. To do.

When the command signal is input from the zone controller 4 as described above, the microcomputer 29 included in the zone controller 4 stores the command signal in the built-in memory. Then, as shown in FIG. 8, the microcomputer 29 performs a step (abbreviated as SP in the figure) step.
After the command signal is input from the zone key 21 or all zone keys 22 in SP1, it is determined in step SP2 that the signal has been input from the numeric keypad 23.
In step 3, it is determined that there is a key input from the operation key 26, or in step SP4 the slat key 27
If it is determined that there is an input from the output unit 31 in step SP5
Output via.

Further, in step SP1, the microcomputer 29 determines that there is no input from the numeric keypad 23 in step SP2 after the command signal from the zone key 21 or all zone keys 22 is input, and from the set key 28 in step SP6. It is determined that there is no input, and step SP7
In step SP3, after it is determined that there is an input from the operation key 26 after the command signal is input from the interlocking key 24, a command code including interlocking is output in step SP5.

Further, the microcomputer 29 determines in step SP1 that there is input from the zone key 21 or all zone keys 22 and in step SP2 that there is no input from the numeric keypad 23, and in step SP6 there was input from the set key 28. If so, in step SP8,
A command code including the set operation code K is output. If the clear command is input from the clear key 25, the microcomputer 29 clears the clear key 2 in step SP9.
It is determined that there is an input from 5, and the contents of the memory included in the microcomputer 29 are cleared in step SP10. Further, if it is determined in step SP11 that any one of the operation key 26, the slat key 27, and the set key 28 has not been input even after a certain time has elapsed after the command signal is input from each key, step SP12 At, the memory is cleared and the initial state is returned.

Next, with reference to FIG. 9, the operation of the blinds 11, 21, 31 of the parent device will be described. Control unit microcomputer
In step SP21, 41 takes in the command code input from the zone controller 4 via the zone controller input unit 47 and stores it in the RAM 411. Then, in step SP22, the microcomputer 41 compares the fetched command code with the zone number set by the device number setting unit 51. Here, the zone code 2 is set as the command code, and the blind 21 of the parent device belonging to the zone 2 is set.
The operation will be described with reference to FIG. In this case, since it is the master unit, the zone number is set by the device number setting unit 51, but if it is the slave unit, the command code is compared with the device number. If it is determined that the command code and the zone number do not match, the command code stored in the RAM 411 is cleared in step SP23 and the initial state is returned to.

However, if the command code and the zone number match, it is determined in step SP24 whether the command code includes interlocking. If the interlocking code is decoded, it is considered that the command code and the zone number match. Step
In SP25, it is determined whether or not the device code matches, but in the case of the master unit, since the zone number is set as the device number, it is determined that the command code and the zone number match, In step SP26, the blind of its own is operated according to the instructions of the operation code C and the auxiliary code Cs.

That is, the microcomputer 41 outputs a command signal to the motor control unit 53 in step SP27 to operate the motor 54 to raise and lower the blind, adjust the slat angle and stop. If the command code is other than the zone code 1, it is the command code for the blinds 22 ... 2n of the slaves belonging to the same zone, so the microcomputer 41 sends the transmission data output section in step SP28.
A command signal is output to the blinds 22 ... 2n of other slave units belonging to the same zone via the 491 and the connection unit 49.

That is, the data is input to the microcomputer 41 via the transmission data input unit 481 included in the blind control unit of the child device. In addition, the signal line S2 is sequentially
A command signal is transmitted via.

Next, the operation of the blind of the child device will be described with reference to FIG. As described above, in the blind of the child device, the connection unit 48 receives the command signal from another blind via the transmission data input unit 481. In step SP31 shown in FIG. 10, the microcomputer 41 takes in the command signal and stores it in the RAM 411. Then, in step SP32, the microcomputer 41 determines whether or not the interlocking signal is included, and in step SP33 compares the device number set by the device number setting unit 51 with the device code U included in the command signal. If they match, the operation code C and the operation auxiliary code Cs are decoded, an operation signal is output to the motor control unit 53 in step SP35, and the motor 54 is driven to raise and lower the blind, adjust the slat angle and Perform stop operation.

When operating the interlocking key 24, for example, after operating the key 211 of the zone 1 included in the zone key 21, operating the interlocking key 24, and subsequently operating the up key 261,
When the stop key 262 is operated, the blinds 11, 12, ... 1n constituting the zone 1 are simultaneously raised, and when the stop key 262 is operated, all the blinds are stopped.

Further, if all the zone keys 22 are operated, then the interlocking key 24 is operated, and the slat angle key 272 is operated, then all the blinds 11, 12, ...
21,22 ... 2n, 31, 32 ... 3n are targeted, and the angles are adjusted by interlocking with each other and rotating the slat so that its inclined surface faces inward. The slat angle keys 271 and 272 continue to output operation signals while being operated, and if the operation is stopped and the input is stopped, the microcomputer 41 outputs a stop signal. At this point, the angle adjusting operation of each blind is stopped.

Further, if the set key 28 is operated after operating, for example, the key 213 of the zone 3 included in the zone key 21, the blinds 32 ... 3n of the slaves included in the zone 3 are the blinds 31 of the parent machine of the zone 3. It works so that the height and the angle of the slats match. That is, when the blind 31 of the parent device receives the command signal including the set operation determination code K from the zone controller 4, the microcomputer 41 of the control unit receives the signal given from the height encoder 42 via the height detection unit 421. Angle encoder 43 to angle detector
The current height of the blinds and the slat angle data are output to the blinds 32 ...

In addition, the blind 31 of the parent device inputs an upper limit detection signal given from the upper limit switch 44 through the upper limit detection unit 441 according to the height of the blind and the slat angle detected by the height encoder 42 and the angle encoder 43. It is possible to know the data of the position and the angle of the slat from the point of time when it is operated, and this value is output to the blinds 32 ... 3n of the slave unit.
According to this data, the blinds 32 ... 3n of the slave unit raise or lower the blinds, then match the height with the blind 31 of the master unit, and then match the angle of the slats.

In this case, the current height of the blind detected by the height encoder 42 and the angle encoder 43 and the angle data of the slat are input to the blind of the slave unit, and the upper limit position detected by the upper limit switch 44 is set. Since it is recognizing, by comparing the data from the blind 31 of the base unit and controlling it to match the data from the blind 31 of the base unit, the blind 31 of the base unit is controlled.
It is possible to match the slat angle with the blind height of each of the blinds 32 ... 3n of the child machine.

The above-described embodiment can also be applied to a cloth blind so-called roll blind installed in an opening of a window of a restaurant or a hotel.

[Effects of the Invention] As described above, according to the present invention, the blinds of the master unit and the slave unit are arranged for each zone, and according to the command from the command means, targeting each zone or all zones, The blinds can be raised and lowered and the blades can be opened and closed collectively or individually. Moreover, by controlling them with a microcomputer, there is no need to use relays as in the past, and work for electrical wiring can be done. Not only can it be reduced, but the blinds themselves are also suitable for mass production, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall construction of an embodiment of the present invention. FIG. 2 is an external view of the blind controller shown in FIG. FIG. 3 is an external view of the zone controller shown in FIG. FIG. 4 is a diagram showing an electrical configuration of the blind controller. FIG. 5 is a schematic block diagram of the zone controller. FIG. 6 is a block diagram of a control unit included in the blind. FIG. 7 is a diagram for explaining a code included in the command signal. FIG. 8 is a flow chart for explaining the operation of the zone controller. FIG. 9 is a flowchart for explaining the operation of the blind control unit of the parent device. FIG. 10 is a flowchart for explaining the operation of the blind control unit of the child device. In the figure, 1 to 3 are zones, 4 is a zone controller, 5 is a blind controller, 7,211 is an up key, 8,262 is a stop key, 9,263 is a down key, 10,11,271,27
2 is slat open / close key, 21 is zone key, 22 is all zone key, 23 is numeric keypad, 24 is interlocking key, 26 is operation key, 27
Is a slat key, 28 is a set key, 29 and 41 are microcomputers, 31 is an output section, 42 is a height encoder, 43 is an angle encoder, 44 is an upper limit switch, 45 is an obstacle switch,
46 is a blind controller input section, 47 is a zone controller input section, 48 and 49 are connection sections, 50 is a parent / child setting section, 51
Is a device number setting unit, 52 is a lower limit setting unit, 53 is a motor control unit, 54 is a motor, 481 is a transmission data input unit, 491 is a transmission data output unit, 11, 21 and 31 are electric blinds of the master unit, 11 ... 1
n, 22 ... 2n, 32 ... 3n indicate blinds of the slave unit.

Claims (1)

[Claims] 1. A plurality of blinds are provided in each of a plurality of zones, one blind among the plurality of blinds included in each zone is defined as a master unit, and the remaining blinds are defined as slave units, and an electric motor. It is an electric blind that raises and lowers each blind and opens and closes the blades according to the rotation of the, and raises and lowers the blinds and the blades of the master unit or the slave unit collectively or individually for each zone or all zones. The master unit includes a command unit that outputs a signal for instructing opening and closing as a code signal for each zone or device, and each master unit, a master receiving unit that receives a command signal from the command unit, and the master unit. The command signal received by the receiving means commands the raising and lowering of the blinds and the opening and closing of the blades collectively or individually in the corresponding zone. A master unit determining unit that determines whether the code is a zone-specific code or a device-specific code, and a code that is an individual lifting command or a collective lifting command of the master unit in the zone is determined by the master unit determining unit. In response to the instruction, the master unit elevating means for raising and lowering the blinds of the master unit, and the code for the individual blade opening / closing command or the collective blade opening / closing command of the master unit in the zone by the master unit determining unit. In accordance with the fact that it is determined that, the master unit opening and closing means for opening and closing the blades of the blind of the master unit, and the collective blind lifting and opening and closing command in the zone or the zone by the master unit determining unit. Depending on whether it is the code of the up / down command and the open / close command of any one of the slaves to which it belongs, the up / down command signal and the open / close command are issued. Including a command signal output means for outputting a code of a signal to each slave, each slave, a slave receiving means for receiving a command signal output from the command signal output means of the master, the slave A command signal received by the machine receiving means is a code for commanding to raise and lower the blind for the child machine, and a code for commanding to move the child machine by the child machine determining means. It is determined that it is the code of the instruction to open / close the blades of the child machine by the child machine raising / lowering means for raising / lowering the blind of the child machine, and the child machine determining means. According to the above, an electric blind including a cordless handset opening / closing means for opening and closing the blade of the cordless handset.