JP3693645B2 - Electric blinds - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric blind that is installed in a window of a building such as a building, a warehouse, and a house and can be remotely operated by transmitting and receiving a signal by key input, and in particular, for controlling such an electric blind. Relates to the controller installed in the.
[0002]
[Prior art]
Recently, various motorized auto blinds installed in windows of offices, conference rooms, stores, etc. have been proposed. Currently proposed and commercially available auto blind controllers are provided with a switch for instructing to raise or lower the blind and a switch for adjusting the slat angle. However, the blind position display and the slat angle display mechanism are generally not displayed.
[0003]
Among them, an electric blind having a mechanism for displaying a slat angle is disclosed in Japanese Patent Laid-Open No. 2-197688. FIG. 14 shows a display panel portion of a controller disclosed in Japanese Patent Laid-Open No. 2-197688. Referring to FIG. 14, the display panel 200 of this controller has a liquid crystal display panel 202. An upper part of the liquid crystal display panel 202 is provided with a display unit 204 arranged in the horizontal direction for displaying the height of the blinds, and a lower part of the liquid crystal display panel 202 is used for displaying the degree of slat opening / closing of the blinds. A plurality of display portions 208 arranged in the horizontal direction are provided.
[0004]
In the example shown in FIG. 14, for example, when a blind (not shown) is operated to raise and lower the blind, one in the display unit 204 blinks according to the height, and is not shown for adjusting the slat opening / closing degree. When the button is operated, one of the display units 208 corresponding to the opening / closing degree of the slats is blinked.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2-197688
[0006]
[Problems to be solved by the invention]
In the apparatus disclosed in the above-mentioned Japanese Patent Laid-Open No. 2-197688, the blind slat opening / closing degree is displayed at the horizontal position of the display unit 208. This intuitively grasps the slat opening / closing degree. There was a problem that it was a difficult display method. Also, the display state has a problem that it is difficult to intuitively understand what is displayed. Furthermore, the controller according to the prior art has a problem that the controller itself is a wall-mounted type and is not appropriate in view of interior decoration. In addition, such a controller needs to communicate with the blind drive control unit, but it takes a lot of time for arrangement if special parts are used in the installation work required for communication. In addition, there was a problem that the construction was difficult. Therefore, it is conceivable to use a communication line for a general-purpose device, for example, a common phone line, but in that case, by mistakenly inserting a telephone line or the like into the connector of this device, There was a risk of damaging the controller circuit.
[0007]
Therefore, one of the objects of the present invention is to provide an electric blind having a controller capable of displaying the opening / closing degree of a slat more intuitively and easily.
[0008]
Another object of the present invention is to provide a controller having excellent decorativeness. Still another object of the present invention is to provide an electric blind having excellent decorativeness at the time of installation.
[0009]
Still another object of the present invention is to provide an electric motor equipped with a controller having the same configuration as a connection pin of the same type as a connection pin used for connecting a telephone and having no possibility of damaging a circuit even if a telephone line is mistakenly connected. Is to provide blinds.
[0010]
[Means for Solving the Problems]
According to an aspect of the present invention, the electric blind is capable of manual operation for operating the blind by operating the blind, a control unit that drives and controls the blind in response to the command signal, and giving the command signal to the control unit An electric blind including a controller, wherein the controller is Operation means for changing the degree of opening and closing of the slats corresponding to the rotation direction of the slats displayed in advance; Means for detecting the degree of opening and closing of the slats of the slat blind and providing it to the controller, the controller including a plurality of display elements arranged in a vertical direction for displaying the degree of opening and closing of the slats in stages; In addition to displaying the tilt angle of the slat according to the degree of opening and closing of the slat in correspondence with the display element, a mark reflecting the sun is placed at a position where the tilt angle of the slat corresponds to the horizontal angle. On the printing sheet fixed to the front of the controller Auxiliary display means for auxiliary display and means for controlling the display of the plurality of display elements in accordance with the open / closed degree of the slats detected by the controller.
[0011]
A plurality of display elements are arranged in a vertical direction, and the slat inclination angle corresponding to the degree of opening and closing of the slats is supplementarily displayed corresponding to the display elements, and the slat inclination angle is set at a position corresponding to the horizontal angle. Since the mark which imaged is supplementarily displayed, the meaning of the display of the display element becomes easier to understand. As a result, when the open / closed degree of the slat is displayed using the display element, the inclination angle of the slat can be intuitively easily understood.
[0013]
In addition, to perform auxiliary display using a print sheet By changing only the sheet printed on the front surface of the controller, it is possible to provide controllers with a wide variety of designs. Therefore, it is possible to provide a controller with excellent decorativeness.
[0014]
Preferably, the controller is embedded in a wall.
Since the controller is a wall-embedded type, it is more decorative than a wall-mounted type.
[0015]
Preferably, the controller has a connection pin to which a communication line for communicating with a controller of another electric blind is connected. This connection pin has the same configuration as that of the connection pin used for connecting the telephone. Further, in the internal connection of this connection pin, the connection pin used for the signal of the telephone is assigned to the ground signal.
[0016]
Since the connection pin connected to the signal line of the telephone is assigned to the ground signal, even if the communication line of the telephone is connected to the connection pin by mistake, the internal circuit of the controller may be damaged by the signal of the telephone There is no.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
FIG. 9 shows an installation example of a system constituted by the electric blind according to the present invention. Referring to FIG. 9, this system includes a plurality (9 in the case of the present embodiment) of blind devices K1 to K9 (K3 to K8 are not shown). These blind devices are divided into four zones 1 to 4 (zone 2 and zone 3 are not shown). For example, zone 1 includes blind devices K1 and K2, zone 2 includes blind devices K3 and K4, zone 3 includes blind devices K5 and K6, and zone 4 includes blind devices K7, K8 and K9.
[0018]
For example, the blind device K1 includes a control unit P1 and a blind N1. The configuration of the blind device K1 described below is the same in the other blind devices K2 to K9. A control unit P1 for driving and controlling the blind N1 is housed above the blind N1. A controller L1 is connected to the control unit P1 through a signal line Q1. The control unit P1 of the blind device K1 raises and lowers the blind N1 by raising and lowering the lifting tape 72.
[0019]
A zone controller S is connected to the blind device K1. This connection is also via the signal line Q1. Only one zone controller S is provided in the system.
[0020]
The control unit P1 is connected via a transmission line M to another control unit, for example, the control unit P2 of the blind device K2.
[0021]
FIG. 10 shows a schematic configuration diagram of the electronic blind system according to Embodiment 1 of the present invention. As shown in FIG. 10, this system includes the aforementioned blind devices K1 to K9 and controllers L1 to L9. The blind devices K1 to K9 are all connected to the same transmission line M. Each of the blind devices K1 to K9 includes blinds N1 to N9 and control units P1 to P9 for driving and controlling the corresponding blinds. Corresponding controllers L1 to L9 are connected to the blind devices K1 to K9 via corresponding signal lines Q2 to Q9, respectively. Controllers L1-L9 can control any of the blind devices connected to the system. Although nine electric blinds are connected in the present embodiment, it is possible to connect ten or more electric blinds.
[0022]
The system further includes a center device R connected to the transmission line M for controlling the entire blind system.
[0023]
Hereafter, the part especially relevant to this invention is demonstrated in detail. FIG. 11 shows a schematic block diagram of the controller L1, the control unit P1, and the zone controller S. Here, the controller L1 and the control unit P1 will be described as an example, but the same applies to other controllers, control units, and zone controllers. This controller is a wall-embedded type related to a switch box for one small size of JIS C 8336.
[0024]
The control unit P1 includes a power supply unit 116 for supplying power from a commercial power source to each unit. The control unit P1 further includes a microcomputer 80 that performs various processes for controlling the blind N1, an upper limit switch 98 that operates when the blind N1 reaches the upper limit, and a blind N1 based on the output of the upper limit switch 98. The upper limit detecting unit 100 for detecting that the upper limit has been reached and giving a signal to the microcomputer unit 80, and the raising or lowering of the blind depending on the change in the tension of the lifting tape 72 shown in FIG. A fault switch 102 that detects a fault, a fault detection unit 104 that detects that a fault has occurred due to the operation of the fault switch 102, and gives a signal to the microcomputer unit 80, and operates when the blind reaches a lower limit Based on the output of the lower limit switch 106 and the lower limit switch 106, De contains a lower limit detection unit 108 for providing the signal detects that reached the lower limit to the microcomputer 80.
[0025]
The control unit P1 further includes a height encoder 90 that encodes the height of the blind, a height detection unit 92 that detects the height of the blind from the output of the height encoder 90 and provides the signal to the microcomputer unit 80, a blind An angle encoder 94 that encodes the angle of the slat, an angle detection unit 96 that detects the angle of the slat based on the output of the angle encoder 94 and supplies the signal to the microcomputer unit 80, and a microcomputer unit 80 for control. The device number setting unit 110 for setting the device number of the unit P1, the transmission line signal transmission unit 86 and the transmission line signal reception unit 88 connected to the microcomputer unit 80 and the transmission line M, and the lifting tape 72 are wound up or Raise blind N1 by lowering or Motor 84 for lowering, drive unit 82 for driving motor 84 in response to a command signal from microcomputer unit 80, controller L1, zone controller S, and response signal connected to microcomputer unit 80 An input unit 114 and a response signal output unit 112 are included.
[0026]
The controller L1 includes a microcomputer unit 140, a response signal input unit 142 and a command signal output unit 144 connected to the command signal input unit 114 and the response signal output unit 112 of the control unit P1, a device number setting unit 146, a microcomputer A key input unit 148 that provides key input to the computer unit 140, an EEPROM storage unit 150, and a display unit 152 that displays various information by the microcomputer unit 140 are included. The key input unit 148 and the display unit 152 are particularly related to the present invention, and will be described later with reference to FIGS. 1 to 8 and FIGS. 12 and 13.
[0027]
The zone controller S includes a microcomputer unit 120, a response signal output unit 122 and a command signal input unit 124 connected to the command signal input unit 114 and the response signal output unit 112 of the control unit P1, a power supply unit 126, and a key input. Part 128, display part 130, and EEPROM storage part 136. The EEPROM storage unit 136 includes a lower limit setting unit 132 and an upper limit setting unit 134.
[0028]
The control unit P1 operates as follows. The microcomputer unit 80 is based on inputs from the height detection unit 92, the angle detection unit 96, the upper limit detection unit 100, the failure detection unit 104, the lower limit detection unit 108, the command signal input unit 114, and the transmission path signal reception unit 88. Then, a signal is sent to the drive unit 82 to drive the motor 84, and the blind N1 is lifted, lowered, stopped, and opened and closed. Communication with another control unit is performed by a transmission line signal transmission unit 86 and a transmission line signal reception unit 88 via a transmission line M. The transmission line M is a three-wire system including a power supply line, a signal line, and a ground line.
[0029]
On the other hand, the control unit P1 uses the command signal input unit 114 and the response signal output unit 112 to communicate with the controller L1 and the zone controller S through the signal line Q1. The signal line Q1 is a three-wire system including a power supply line that supplies power to the controller L1, a signal line, and a ground line.
[0030]
Note that it is necessary to set the device number of the control unit P1 because of communication with other devices via the transmission path. The device number is set by the device number setting unit 110. This device number setting unit is configured by a switch or the like.
[0031]
The height encoder 90 detects the position information of the blind, and the height information is given to the microcomputer unit 80 by comparing and detecting this signal with the height detection unit 92. The slat angle is detected by the angle encoder 94, and this signal is compared and detected by the angle detection unit 96 and given to the microcomputer unit 80. When the upper limit switch 98 is turned on, the upper limit detection unit 100 detects that the blind N1 has reached the upper limit, and gives a signal to the microcomputer unit 80. Similarly, when the lower limit switch 106 is turned ON, the lower limit detection unit 108 gives the signal to the microcomputer unit 80.
[0032]
When the blind is lifted or lowered, and the load becomes less than the specified value, the tension of the lifting tape 72 shown in FIG. 9 changes. The failure switch 102 detects this change in tension, and the failure detection unit 104 detects the output of the failure switch 102 and provides the signal to the microcomputer unit 80.
[0033]
The zone controller S operates as follows. The zone controller S has a character display unit 130 made of liquid crystal, and uses the keys of the key input unit 128 to set the upper limit, the lower limit, and the like to be set in the control unit P1 in the EEPROM storage unit 136. These pieces of information are transmitted from the zone controller S via the signal line Q1 to the control unit P1 and the controller L1. An acknowledgment signal or the like from the control unit P1 is received by the command signal input unit 124.
[0034]
The controller L1 operates as follows. The controller L1 communicates with the control unit P1 and the zone controller S using the response signal input unit 142 and the command signal output unit 144.
[0035]
The device number of the controller L1 is set by the device number setting unit 146. The appearance of the display unit 152 and the key input unit 148 of the controller L1 is shown in FIG. Referring to FIG. 1, a key sheet 26 for a LOCAL key, a key sheet 28 for an OPEN key, a key sheet 30 for a STOP key, a key sheet 32 for a CLOSE key, and a key sheet 22 for a slat forward rotation key are disposed on the front surface of the controller L1. The printing sheet 40 on which the key sheet 24 of the slat reverse rotation key is printed is fixed. The slat forward rotation key and the slat reverse rotation key are used when the slat is opened and closed. When these keys are operated, the slats rotate in the forward and reverse directions to change their angles, thereby changing the opening / closing degree of the slats. The printed sheet 40 is formed with LED display windows 34 of 15 stages for displaying the slat opening / closing degree arranged in the vertical direction, and the display of the display window 34 by the display element indicates the opening / closing degree of the slats. A print 36 and a print 38 are displayed for displaying the above. The print 36 indicates the opening / closing degree of the slats by a linear angle, and displays the opening / closing degree of the slats in an auxiliary manner in association with the display position of the display window 34. The print 38 is intended to indicate that the area where the slats are exposed to the most direct sunlight at a horizontal angle is large, and is a mark that specifically images the sun. The degree of opening and closing of the slats can be intuitively determined by the prints 36 and 38 formed on the print sheet 40 and the light emission of the display elements in the display window 34. The light emitting window 34 is formed at a location corresponding to the opening of the light emitting element LED. Therefore, by changing the printing color of the printing sheet of this portion, it is possible to diffuse and emit a plurality of colors in combination with the selection of the emission color of the LED.
[0036]
FIG. 2 is a front view of the opening of the resin molded product of the key top and the display element of the controller L1. FIG. 6 shows a rear view of the front cabinet 68 fitted into the opening of the resin molded product, and FIG. 7 shows a side sectional view. The printing sheet 40 shown in FIG. 1 is affixed on the front cabinet 68 shown in FIG. The front cabinet 68 is fitted into the opening of the resin molded product shown in FIG. Then, this resin molded product is fixed to a switch box of JIS C 8336. FIG. 8 shows a cross-sectional view thereof. 6 to 8 will be described later.
[0037]
Referring to FIG. 2, this controller L1 includes a slat forward rotation key 42, a slat reverse rotation key 44, a LOCAL key 46, an OPEN key 48, a STOP key 50, and a CLOSE key 52. An opening 54 is formed. The opening 54 corresponds to the light emitting window 34 provided in the print sheet 40 shown in FIG. Below each key top, there is a switch attached to the substrate. When a key sheet on the key top is pressed, the switches are turned on and a signal is input to the microcomputer unit 140. The opening 54 has an oval shape by limiting the shape of light emitted by the light emitting element. As shown in FIG. 2, openings 58 for engaging the claws of the front cabinet 68 are formed at the four corners of the resin molded product.
[0038]
A cross section of the controller L1 including the opening 54 is shown in FIG. With reference to FIG. 3, a printed circuit board 60 is provided in the back of the opening 54, and an LED 64 that is a light emitting element corresponding to each opening 54 is formed on the surface of the printed circuit board 60 on the opening 54 side. Is surface mounted. The light emission of the LED 64 is limited by the cabinet opening 54. As described above, in order to display the opening / closing degree of the slats, 15 LEDs 64 are used and arranged in the vertical direction. The number of LEDs is the number selected for matching the number of steps of the control unit P1 that controls the degree of opening and closing of the slats and the calculation result from the angle encoder, and is based on the display using these 15 LEDs. An appropriate control amount of the slat opening / closing degree can be displayed.
[0039]
Further, referring to FIG. 3, a modular outlet 62 as a connection terminal block with the outside and a switch 66 of a device number setting unit are provided on the back surface of the controller L1.
[0040]
FIG. 4 shows a view of the controller L1 as seen from the back. FIG. 4 shows a modular outlet 62 and a device number setting unit switch 66. As shown in FIG. 4, the modular outlet 62 is a double type. A signal line Q1 is connected to the modular outlet. As described above, the signal line Q1 is composed of three lines. In the case of this embodiment, each of the modular outlets 62 is a 6-pin modular outlet, and two pins are used for connecting the signal line Q1. The details are shown in FIG.
[0041]
As shown in FIG. 5, in the dual modular outlet 62, the 1st and 2nd pins of each modular are used as power lines. Pins 3 and 4 are used for ground lines. Pins 5 and 6 are used for signal lines. This wiring method is similarly applied to the zone controller S.
[0042]
This type of modular outlet has the same shape as a modular outlet for a telephone line. Therefore, there is a possibility that the telephone line modular is inserted by mistake. However, if the connection shown in FIG. 5 is made, even if a telephone line modular is accidentally inserted, no damage is caused to the equipment as described below.
[0043]
The wiring used for the general public telephone line is the 3rd pin and the 4th pin. In the present embodiment, a ground signal is assigned to these two pins. Therefore, even if a telephone line modular is inserted into the modular outlet 62 of the controller L, it is only electrically short-circuited. No voltage is applied to the controller L side. Therefore, there is no possibility that the circuit of the controller L is destroyed. Also, no voltage is applied to the telephone line side.
[0044]
In actual construction, a protective cover should be attached to prevent dust and dirt from entering the terminal body, and precautions should be written here to prevent incorrect wiring.
[0045]
Even if the telephone line is short-circuited as described above, the telephone switch has an internal resistance, so that the telephone line is not damaged. As shown in FIG. 5, the two modular outlets are connected in parallel and have the same contents. Therefore, either one of the modular insertions can be used. The extension or branch of the signal line can be easily constructed by using this modular terminal body even if it is embedded. In addition, since two identical modulars are in parallel and both have the same electrical configuration, no error occurs in the wiring work of extension work, and construction can be performed in a short time. Furthermore, since this modular is versatile, there is also an effect that parts can be easily procured. In addition, since the two parallel modules have the same contents as described above, it is not necessary to consider the order of connection when connecting the zone controller S, the controller L1, and the control unit P1. There is also an effect. That is, the control unit P1, the zone controller S, and the controller L1 can be connected in this order, and the control unit P1, the controller L1, and the zone controller S can be connected in this order.
[0046]
Referring to FIG. 6, the front cabinet 68 has a rectangular opening at the center thereof. As shown in FIGS. 6 and 7, nails 70 for fixing the front cabinet 68 to the resin molded product shown in FIGS. 2, 3, and 4 are formed at the four corners of the back surface of the front cabinet 68. The front cabinet 68 is attached to the resin molded product by inserting and engaging the claw 70 into the opening 58 of the resin molded product of the controller L1 described above.
[0047]
Referring to FIG. 8, on the front side of controller L <b> 1, screw 78 is provided so that makeup cover 72, which is a cosmetic ornament for decorating between the wall surface and front cabinet 68, exposes print sheet 40. Mounted using. And this controller L1 is fixed to the switch box 74 of JIS C 8336 using the screw 77. This switch box 74 is installed embedded in a wall. Note that the signal line Q1 is led out from the doorway 76 on the back surface of the controller L1.
[0048]
[Embodiment 2]
FIG. 12 shows a print sheet of the controller L1 ′ according to the second embodiment of the present invention. Referring to FIG. 12, this print sheet 180 is printed with key sheets 162, 164, 166, 168, 170 and 172 (corresponding to key sheets 22, 24, 26, 28, 30 and 32 in FIG. 1, respectively). Furthermore, it has a light emitting window 170 formed so that the light emitting element is displayed in accordance with the slat shape of the blind. FIG. 13 shows a front view of the display opening from which the print sheet 180 has been removed. In FIG. 13, the key tops 182, 184, 186, 188, 190 and 192 correspond to the key tops 42, 44, 46, 48, 50 and 52 of FIG. The claw 196 corresponds to the claw 70 of FIG. The controller L1 ′ further has an opening 194 formed in the same shape as the light emitting window 170 of FIG. The opening 194 is formed to imitate the corresponding slat shape of the blind when opening and closing, and the LED is disposed behind the opening 194 as described above.
[0049]
When the printed sheet 180 shown in FIG. 12 is pasted on the display opening having the shape of FIG. 13 and the LED is caused to emit light through the opening and the display window corresponding to the opening / closing degree of the slat, the shape corresponding to the opening / closing degree of the slat The LED light of the part is displayed. Since the open / closed degree of the slat is represented by the shape of the slat corresponding to the open / closed degree, the display of the open / closed degree of the slat can be intuitively understood without the auxiliary display by the printed material as in the first embodiment. . Note that the shapes of the display opening and the display window shown in FIGS. 12 and 13 can be considered to be the same shape (shape when the slat is viewed from the side) having different directions or inclinations depending on the angle of the corresponding slat. It can also be said that the shape is different depending on the angle of the corresponding slat. Of course, these shapes, directions, and angles can be arbitrary as long as the shape of the slat can be intuitively grasped.
[0050]
As described above, according to the present invention, the open / closed state of the slats is displayed according to the light emission state of the display elements arranged in the vertical direction. Further, the light emitting window of the display element at that time has the same shape having a different direction or inclination according to the angle of the corresponding slat, or has a different shape according to the angle of the corresponding slat. Therefore, the opening / closing degree of the slat can be known intuitively. Further, the open / closed state of the slats is indicated by a display element, and the corresponding open / closed degree is supplementarily displayed with printed matter, so that the open / closed state of the slats can be confirmed more clearly and without misunderstanding. In addition, by changing the color of the printed material of the printed sheet on the light emitting element corresponding to the display window to various colors, the light emitting display indicating the degree of opening and closing of the slats can be variously changed. For example, by selecting a color close to an actual blind, it is possible to express a sense of unity with the blind. Further, by selecting a print sheet suitable for the installation location, it is possible to select a print sheet having various colors, and to match the controller and the surrounding environment.
[0051]
It is needless to say that the present invention is not limited to the above-described embodiments, and can be implemented with various changes within the scope of the matters described in the claims.
[Brief description of the drawings]
FIG. 1 is a plan view of a printed sheet of a controller of an electric blind according to a first embodiment of the present invention.
FIG. 2 is a front view of a display opening of the controller of the electric blind according to the first embodiment of the present invention.
FIG. 3 is a side sectional view of the controller of the electric blind according to the first embodiment of the present invention.
FIG. 4 is a rear view of the controller of the electric blind according to the first embodiment of the present invention.
FIG. 5 is a diagram schematically showing a modular and its connection relationship in the controller of the electric blind according to the first embodiment of the present invention.
FIG. 6 is a rear view of the front cabinet of the controller of the electric blind according to the first embodiment of the present invention.
FIG. 7 is a side sectional view of the front cabinet of the controller of the electric blind according to the first embodiment of the present invention.
FIG. 8 is a side sectional view showing a state where the controller of the electric blind according to the first embodiment of the present invention is fitted in the switch box of JIS C8336.
FIG. 9 is a diagram schematically showing an example of system installation according to the present invention.
FIG. 10 is a system diagram of the present invention.
FIG. 11 is a schematic block diagram of each controller and control unit of the present invention.
FIG. 12 is a front view showing a print sheet of a controller used in Embodiment 2 of the present invention.
FIG. 13 is a front view showing a display opening of a controller used in Embodiment 2 of the present invention.
FIG. 14 is a plan view of a display panel of a controller used in a conventional electric blind.
[Explanation of symbols]
L1-L9 controller, S zone controller, P1-P9 unit controller, 22, 162 Slat forward rotation key sheet, 24, 164 Slat reverse rotation key sheet, 42, 182 Slat forward rotation key, 44, 184 Slat reverse rotation key, 34, 174 Display window of display element, 54, 194 Opening of display element, 64 display element (LED).

Claims (2)

With blinds,
A control unit that drives and controls the blind in response to a command signal;
An electric blind including a manually operable controller for operating the blind by giving a command signal to the control unit,
The control unit includes means for detecting the open / closed degree of the slats of the blind and giving it to the controller,
The controller is
Operation means for changing the degree of opening and closing of the slats corresponding to the rotation direction of the slats displayed in advance;
A plurality of display elements arranged in a vertical direction for displaying the opening / closing degree of the slats in stages;
The tilt angle of the slat according to the degree of opening and closing of the slat is displayed in an auxiliary manner corresponding to the display element, and a mark simulating the sun at a position where the tilt angle of the slat corresponds to a horizontal angle is displayed on the front of the controller. Auxiliary display means for auxiliary display on a fixed print sheet ;
An electric blind comprising: means for controlling display of the plurality of display elements in accordance with the degree of opening and closing of the slats detected by the control unit. The controller has a connection pin to which a communication line for communicating with a controller of another electric blind is connected;
The connection pin has the same configuration as the configuration of the connection pin used for connecting the telephone,
2. The electric blind according to claim 1, wherein, in the internal connection of the connection pins, a connection pin used for a signal line of the handset is assigned to a ground signal.

Images