Electric shading device and control method thereof

Abstract

To provide an electric shielding device whose opening and closing operation is extremely easy.SOLUTION: An operation is started with the operation of any one button (switch) in an operation part as a trigger (S1). When an "Open" button is operated (Yes in S3), a control part operates a motor so that an outside curtain and an inside curtain are brough into a fully opened state (S4). When a "Close" button is operated (Yes in S5), the control part operates the motor so that the outside curtain and the inside curtain are brought into fully closed state (S6). When a "Lace" button is operated (Yes in S7), the control part operates the motor so that the outside curtain is brought into a fully closed state and the inside curtain is brought into a fully open state (S8). Meanwhile, when any one motor is in operation (Yes in S2), the control part stops the motor in operation (S9).SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to an electric shading device in which the opening and closing of a shading material such as a curtain is controlled by a motor, and a control method thereof. [Background technology]

[0002] Curtains (shading devices) whose opening and closing is controlled by a motor are widely used. In this case, each part of the curtain is attached to a corresponding runner, and each runner is movable along a rail (curtain rail). The opening and closing of the curtain is controlled by controlling the movement of the runner, particularly the end side of the curtain (the leading side when the curtain is closed), with a motor. In this case, the user can control the opening and closing of the curtain simply by operating a switch or remote control transmitter near the curtain, greatly reducing the effort required by the user.

[0003] Curtains are typically installed near windows, and opening and closing them controls the amount of sunlight entering the room and the ventilation on and off. When the curtains are open, sunlight and air are let in, but the room is visible from the outside. When the curtains are closed, the inside of the room is not visible from the outside, but sunlight cannot be let in. To deal with this situation, double curtains are used, with one curtain on the window side and one on the room interior side. In this case, lace curtains are used on the window side, which allow a certain amount of sunlight to enter and also have a certain degree of blocking ability from outside visibility, while drape curtains made of thicker fabric are used on the room interior side, which have better ability to block sunlight and block outside visibility than lace curtains.

[0004] By controlling the opening and closing of two types of curtains with different characteristics, various settings are possible, such as closing both types of curtains, opening both types of curtains, opening one curtain and closing the other, etc. In this case, two parallel rows of curtain rails are formed for each curtain, and the opening and closing of each curtain is controlled independently.

[0005] Such double curtain structures are described in Patent Documents 1 and 2. In the technology described in Patent Document 1, a single motor is connected to each of the two types of curtains via a clutch, and by operating this clutch, the single motor controls the opening and closing of the two types of curtains independently.

[0006] Patent Document 2 describes a structure in which a motor is provided for each curtain (curtain rail), but the control unit and power supply unit for controlling the motor are provided only on one side of the curtain rail. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Utility Model Application Publication No. 62-129984 [Patent Document 2] Japanese Patent Application Laid-Open No. 2017-29371 Summary of the Invention [Problem to be solved by the invention]

[0008] In the double curtains described above, the opening and closing operation of each curtain is controlled individually. However, when such double curtains are used in, for example, hotel rooms, the user is often not an expert in this operation and is operating the double curtains for the first time. For such users, opening and closing such double curtains is not easy. For this reason, there has been a demand for a double curtain (electric shading device) that is extremely easy to open and close.

[0009] The present invention has been made in view of the above problems, and an object of the present invention is to provide an invention that solves the above problems. [Means for solving the problem]

[0010] In order to solve the above problems, the present invention has the following configurations. The present invention provides an electric shading device in which the opening and closing operations of a first shielding material and a second shielding material, which are both controlled by in-plane operation and are installed approximately parallel to and spaced apart from each other in a direction perpendicular to the in-plane direction, are controlled by a motor, and the device is characterized in that it comprises an operation unit in which a first state in which the first shielding material and the second shielding material are both fully closed, a second state in which the first shielding material and the second shielding material are both fully open, and a third state in which the first shielding material is fully closed and the second shielding material is fully open, are set, and which is provided with a first switch, a second switch, and a third switch corresponding to the first state, the second state, and the third state, respectively, and a control unit that, when any of the first to third switches is operated by the operation unit while the motor is stopped, drives the motor to realize one of the first to third states corresponding to one of the first to third switches that was operated. In the present invention, when any one of the first to third switches is operated on the operation unit while the motor is operating, the control unit stops the motor. 。 The present invention is characterized in that the first shielding material is a lace curtain, and the second shielding material is a drape curtain. The present invention is a control method for an electric shading device that uses a motor to control the opening and closing operations of a first shielding material and a second shielding material that are both controlled to open and close by in-plane operation and are installed approximately parallel to and spaced apart from each other in a direction perpendicular to the in-plane direction, wherein a first state in which the first shielding material and the second shielding material are both fully closed, a second state in which the first shielding material and the second shielding material are both fully open, and a third state in which the first shielding material is fully closed and the second shielding material is fully open are set, and an operation unit is provided in which a first switch, a second switch, and a third switch are provided corresponding to the first state, the second state, and the third state, respectively, and when any of the first to third switches is operated while the motor is stopped, the motor is driven to realize any of the first to third states corresponding to any of the first to third switches that was operated. The present invention is characterized in that, when any of the first to third switches is operated while the motor is operating, the motor is stopped. [Effects of the Invention]

[0011] Since the present invention is configured as described above, it is possible to obtain an electrically operated shading device that is extremely easy to open and close. [Brief explanation of the drawings]

[0012] [Figure 1] 1A to 1C are top views showing a plurality of states of an electric shading device according to an embodiment of the present invention. [Figure 2] 1A to 1C are perspective views showing a plurality of states of an electric shading device according to an embodiment of the present invention. [Figure 3] 1 is a diagram showing a configuration of an electric shading device according to an embodiment of the present invention; [Figure 4] 2A to 2C are external views (two examples) of a switch used in an electric shading device according to an embodiment of the present invention. [Figure 5] 4 is a flowchart showing the operation of the electric shading device according to the embodiment of the present invention. [Figure 6]1 is a perspective view showing a structure of an electric shading device according to an embodiment of the present invention. [Figure 7] 1 is a top view showing the structure and operation of an electric shading device according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] An electric shading device and a control method thereof according to an embodiment of the present invention will be described. Fig. 1 is a top view showing the operation of this electric shading device (double curtain) 1. Here, the top view shows that the upper side of the figure is the window side (outside) and the lower side of the figure is the room side (inside).

[0014] Here, outer curtains (lace curtains: first shielding material) 11 and 12 made of thin, translucent fabric are used on the left and right sides, respectively, near the windows (upper side in the figure). In FIG. 1, the room's windows are actually located above the outer curtains 11 and 12. The outer curtains 11 and 12 are hung by being fixed at their upper parts by runners 51 and 52 at six points in the figure. Each runner 51 and 52 is attached to a rail (first rail) 21 that extends horizontally above the outer curtains 11 and 12, respectively, so as to be movable along the extension direction (horizontal direction) of the rail 21. In particular, the rightmost leading runner (first driving runner) 51A of the runners 51 and the leftmost leading runner (first driving runner) 52A of the runners 52 are driven by motors, as described below, and are controlled to move in opposite directions along the extension direction of the rail 21. As a result, the opening and closing of the outer curtains 11 and 12 is controlled by their movement along a substantially in-plane direction. In FIG. 1, the runners 51, 52 and the rail 21 are simply shown with respect to only the positional relationship therebetween (particularly in the horizontal direction), and the specific structure of the rail 21 and the like will be described later.

[0015] Similarly, on the indoor side (lower side in the figure), inner curtains (drape curtains: second shielding material) 31, 32 made of thick opaque fabric are used on the left and right sides, respectively, and runners 61, 62 (leading runners ((second driving runners)) 61A, 62A) and rails (second rails) 41 are provided for these. The opening and closing operations are also performed in the same way as for the outer curtains 11, 12. The rails (first rails) 21 and rails (second rails) 41 are approximately parallel to each other.

[0016] Here, the outer curtains (lace curtains) 11, 12 are made of thin, semi-transparent fabric, so sunlight can pass through them and enter the room from the window. However, because there is a certain degree of visibility through them, if you do not want people to see inside the room from outside, simply covering the window with them is not enough.

[0017] On the other hand, the inner curtains (drape curtains) 31, 32 are made of a thick, opaque fabric, so sunlight cannot enter the room through the window and visibility through them is low, so if you do not want the room to be seen from outside, simply covering the window with these curtains is sufficient. Therefore, with this double curtain 1, by controlling the opening and closing of the inner curtains 11, 12 and the outer curtains 31, 32, respectively, the user can achieve the desired conditions regarding the amount of sunlight entering the room and the visibility from outside.

[0018] In Figure 1, (a) shows the outer curtains 11, 12 and inner curtains 31, 32 all fully closed, (b) shows the state where they are all half-open (halfway between open and closed), and (c) shows the state where they are all fully open. Figure 1(a) shows the state where sunlight entry and visibility from the outside are lowest, and Figure 1(c) shows the state where sunlight entry and visibility from the outside are highest. Also, Figure 1(d) shows the state where outer curtains 11, 12 are fully closed and inner curtains 31, 32 are fully open. This state is used, for example, when it is desired to let sufficient sunlight into the room from outside while reducing visibility from outside.

[0019] The movements of outer curtain 12 and inner curtain 32 during these operations are symmetrical to those of outer curtain 11 and inner curtain 31, respectively. Furthermore, the basic configuration and movements of inner curtains 31 and 32 are the same as those of outer curtains 11 and 12. For example, when outer curtain 11 is in any of the above-mentioned states of fully open, half open, or fully closed, outer curtain 12 is also fully open, half open, or fully closed accordingly. The same is true for inner curtains 31 and 32; when inner curtain 31 is in any of the states of fully open, half open, or fully closed, inner curtain 32 is also fully open, half open, or fully closed accordingly.

[0020] Figure 2(a) is a perspective view of outer curtain 11 and the related structure in the state of Figure 1(a), Figure 2(b) is a perspective view of outer curtain 11 in the state of Figure 1(b), and Figure 2(c) is a perspective view of outer curtain 12 in the state of Figure 1(c). As mentioned above, the structure related to outer curtain 12 is symmetrical to outer curtain 11, the structure related to inner curtain 31 is the same as in Figure 2, and the structure related to inner curtain 32 is the same as outer curtain 12. In Figure 2, the positional relationship between runner 51 and rail 21 (particularly in the horizontal direction) is shown simply.

[0021] As shown in Figures 1 and 2, the opening and closing of each curtain is controlled by the movement of the front runner. The two curtains in this double curtain system 1 can be set to three basic states: (1) both the outer and inner curtains are fully closed (first state), (2) both the outer and inner curtains are fully open (second state), and (3) the outer curtain is fully closed and the inner curtain is fully open (third state). State (1) provides the strongest sunlight blocking and the lowest visibility from outside the room. State (2) allows the maximum amount of sunlight into the room and maximizes visibility from outside the room. State (3) is an intermediate state between states (1) and (2), allowing a certain amount of sunlight to enter from outside while also limiting visibility from outside to a certain extent. However, depending on the timing of the switch operation, each curtain can also be set to an intermediate state between these two.

[0022] The following describes the configuration for controlling this double curtain 1. Fig. 3 shows the configuration related to the control of the outer curtains 11, 12 and the inner curtains 31, 32. As will be described later, the operation of the outer curtain 12 and the inner curtain 32 (leading runners 52A, 62A) is synchronized with the outer curtain 11 and the inner curtain 31 (leading runners 51A, 61A), respectively.

[0023] The leading runner (first driving runner) 51A that drives the outer curtain 11 and the leading runner (second driving runner) 61A that drives the inner curtain 31 are driven by a motor (first motor: outer motor) 71 and a motor (second motor: inner motor) 72, respectively. This structure will be described later. In this case, the movement of each leading runner is limited to the direction along each rail. The direction of movement is controlled by the direction of rotation of each motor, which makes it possible to control the opening and closing operations of the outer curtain 11 and the inner curtain 31. A control unit 80 equipped with a CPU controls this operation, thereby controlling the opening and closing operations of each curtain. This control is performed by a user operating an operation unit 90 connected to the control unit 80. A power supply unit 100 is also provided for generating power supply voltages from AC 100V to drive the control unit 80 and each motor.

[0024] Here, the operation unit 90 is provided with only three switches corresponding to the three states. Fig. 4(a) is a perspective view of the appearance of this operation unit 90. Here, there are provided a "close" button (first switch) 90A corresponding to the state (1), an "open" button (second switch) 90B corresponding to the state (2), and a "lace" button (third switch) 90C corresponding to the state (3).

[0025] Furthermore, the leading runners 51A and 52A move to the right and left, respectively, to reach the state shown in FIG. 1(a), thereby placing the outer curtain 11 in a fully closed state. At this time, the leading runner 51A abuts against the leading runner 52A, which has moved in the opposite direction, preventing it from moving any further to the right. This prevents the motor 71 from rotating or increases the operating current, allowing the control unit 80 to recognize this (that the outer curtain 11 is fully closed). This allows the power supply to the motor 71 to be stopped in this state. Furthermore, if the leading runner 51A moves leftward to reach the fully open state shown in FIGS. 1(c) and 2(c), the leftmost runner 51 in the figure abuts against the left stopper, causing the five runners 51 and the leading runner 51A to come into close contact with each other, preventing the leading runner 51A from moving any further to the left. This allows the control unit 80 to recognize that the outer curtain 51 is fully open and stop the power supply to the motor 71. The same applies to the inner curtain 31 (leading runners 61A, 62A) side; when the inner curtain 31 is fully closed or fully open, the control unit 80 can recognize this and stop the motor 72.

[0026] In this configuration, the above states (1) to (3) can be realized very easily by operating these three switches. In this case, if any of the switches is operated while each leading runner is moving (each motor is operating) to achieve the above states (1) to (3), the motor that is operating will stop, and the opening and closing operation of the corresponding curtain will stop at that point.

[0027] 5 is a flowchart showing this operation in the control unit 80. This operation is triggered by the operation of any button (switch) on the operation unit 90 (S1). The control unit 80 determines whether or not both motors 71 and 72 are stopped at this point (whether or not at least one of the motors is operating) (S2). If no motor is operating (S2: No), it is determined which button (switch) has been operated.

[0028] If the "open" button 90B is operated (pressed) (S3: Yes), the control unit 80 operates the motors 71 and 72 to fully open the outer curtain 11 and the inner curtain 31 (the state (2) above) (S4). Specifically, the control unit 80 controls the motors 71 and 72 to move the leading runners 51A, 52A, 61A, and 62A to the state shown in FIG. 1(c) (to fully open the outer curtain 11 and the inner curtain 31). In this case, when the leading runners reach the positions shown in FIG. 1(c) or are already in the positions shown in FIG. 1(c) at this point, the motors 71 and 72 stop as described above. This ends the operation, and both the outer curtain 11 and the inner curtain 31 are fully open.

[0029] If the "close" button 90A is operated (pressed) (S5: Yes), the control unit 80 operates the motors 71 and 72 to fully close the outer curtain 11 and the inner curtain 31 (the state (1) above) (S6). Specifically, the control unit 80 controls the motors 71 and 72 to move the leading runners 51A, 52A, 61A, and 62A to the state shown in FIG. 1(a) (to fully close the outer curtain 11 and the inner curtain 31). In this case, when the leading runners reach the positions shown in FIG. 1(a) or are already in the positions shown in FIG. 1(a) at this point, the motors 71 and 72 stop. This ends the operation, and both the outer curtain 11 and the inner curtain 31 are fully closed.

[0030] If the "Race" button 90C is operated (pressed) (S7: Yes), the control unit 80 operates the motors 71 and 72 (S8) to fully close the outer curtain 11 and fully open the inner curtain 31 (the state (3) above). Specifically, the control unit 80 controls the motor 71 in the same manner as when the "Close" button 90A is operated (pressed) (S6) to move the leading runners 51A and 52A to fully close the outer curtain 11. Meanwhile, the control unit 80 controls the motor 72 in the same manner as when the "Open" button 90B is operated (pressed) (S4) to move the leading runners 61A and 62A to fully open the inner curtain 31. This completes the operation, and the outer curtain 11 is fully closed and the inner curtain 31 is fully open.

[0031] On the other hand, if any of the motors is operating (S2: Yes), it is recognized that one of the above operations (S4, S6, S8) is currently being performed. In this case, the control unit 80 stops the operating motor (S9).

[0032] In the above operation, it is not necessary to separately control the opening and closing of outer curtain 11 and inner curtain 31, and the above states (1) to (3) can be achieved by operating only three types of switches. This makes this operation extremely easy, and for example, in a hotel room, a guest can easily perform this operation even without instructions on how to use it.

[0033] As described above, for example, the state in which both the outer curtain and the inner curtain are half-open (the state in FIG. 1(b)) can be realized by operating any of the switches (S2: Yes) during the transition from state (1) to state (2) (or vice versa). Similarly, the state in which the outer curtain is fully closed and the inner curtain is half-open can be realized by operating any of the switches during the transition from state (3) to state (1), and the state in which the outer curtain is half-open and the inner curtain is fully open can be realized by operating any of the switches during the transition from state (2) to state (3). In other words, the three states can be easily realized using the three types of switches described above, and by stopping the motor while it is operating (S9), states other than these three can also be realized.

[0034] A specific example of the configuration of FIG. 3 will be described. Here, a structure in which a first rail and a second rail are connected can be used. FIG. 6 shows a perspective view of a structure in which rail 21 and rail 41 in FIG. 1 are integrated. Also, in FIG. 6, the curtains are not shown. FIG. 7 is a top view schematically showing the operation of each runner and the leading runner in this structure.

[0035] In FIG. 6, a rail (first rail) 21 and a rail (second rail) 41 are connected by a plate-shaped connecting part 200 in a direction perpendicular to the extension direction (opening / closing direction). On one side of the rail extension direction (the right side in FIGS. 1 and 6), the rails 21 and 41 are fixed via a box-shaped base 210. Motors 71 and 72 are provided within the base 210, which drive the leading runner as described above. A control unit 80 and a power supply unit 100 that supplies power to the control unit 80 and the motors 71 and 72 are also provided within the base 210. The structure in FIG. 6 is fixed to a ceiling or the like in a room at multiple locations on the connecting part 200 using fasteners such as wood screws. The operating unit 90 is provided at a location away from the base 210 where it can be easily operated by a user, and is connected to the control unit 80 (base 210) by wiring. A power plug to which an AC 100V power supply is connected is connected to the power supply unit 100. A pulley 73 for driving the leading runners 51A, 52A (not shown in FIG. 6) and a pulley 74 for driving the leading runners 61A, 62A are both provided on the upper side of the base 210, and are driven by motors 71, 72, respectively.

[0036] In this structure, rails 21, 41, base 210, etc. are integrated, making it easy to install indoors. After that, the user can easily install this motorized shading device by attaching each runner shown in Figure 1 to rails 21, 41 and then attaching each curtain to them.

[0037] The cross-sectional shapes of rails 21 and 41 are set so that the runners attached to them can move (slide) along the extension direction. Figure 7 shows the state in which outer curtains 11 and 12 are fully closed and inner curtains 31 and 32 are fully open (state (3) above). Here, runners other than leading runners 51A, 52A, 61A, and 62A are not driven, and move freely in conjunction with the opening and closing movements of each curtain in response to the movement of the leading runner. Figures 1 and 7 show only the upper portion of each runner (the portion within each rail) schematically, and Figure 6 shows only the lower portion of each runner (the portion attached to each curtain below each rail).

[0038] In Figure 7, pulley 75 is rotatably mounted on the rail 21 opposite pulley 73, and pulley 76 is rotatably mounted on the rail 41 opposite pulley 74. A drive wire W1 is stretched between pulley 73 and pulley 75 on the rail 21 side, and a drive wire W2 is stretched between pulley 74 and pulley 76 on the rail 41 side. As motor 71 (pulley 73) rotates, the upper and lower portions of wire W1 move in opposite directions. Wire W2 is also driven by motor 72 in the same way.

[0039] Therefore, if a leading runner 51A is attached to the lower portion of the wire W1 and a leading runner 52A is attached to the upper portion of the wire W1, the leading runners 51A and 52A can be moved in synchronous opposite directions in accordance with the rotation of the motor 71. If a leading runner 61A and a leading runner 62A are similarly attached to the wire W2, they can be moved in the same manner.

[0040] 7, on the rail 21 side, as the drive wire W1 is driven clockwise, the left leading runner 51A moves to the right and the right leading runner 52A moves to the left. As a result, the leading runners 51A and 52A come into contact at their horizontal centers, restricting their movement and stopping the motor 71. As a result, the outer curtains 11 and 12 are fully closed.

[0041] Meanwhile, on the rail 41 side, the drive wire W2 is driven counterclockwise, causing the left leading runner 61A to move leftward and the right leading runner 62A to move rightward. As a result, the leading runner 61A is stopped by the left stopper via the five runners 61 and stops, and the leading runner 62A is stopped by the right stopper via the five runners 62 and stops. This causes the inner curtains 31, 32 to be fully open. This results in the state (3) described above.

[0042] The control unit 80 recognizes the operation of the operation unit 90 and controls the motors 71 and 72 provided in the base 210 together with the control unit 80 to perform the above-described operations. In the configuration of FIG. 6, the control unit 80 and the operation unit 90 are connected by wire, but they may also be connected by remote control communication using, for example, infrared rays. In this case, the convenience of the operation unit for the user can be particularly enhanced. FIG. 4(b) is a top view showing the configuration of such a remote control transmitter (operation unit) 91. Since such a remote control transmitter 91 is held by the user, it is preferable that it has an elongated shape that is easy to hold. In this case, the same operations as those described above can be performed by appropriately providing a receiver for this remote control communication in the base or another part.

[0043] In the above example, lace curtains were used as the outer curtains (first shading material) 11, 12 on the window side, and drape curtains were used as the inner curtains (second shading material) 31, 32 on the room interior side. However, drape curtains may be provided on the outside and lace curtains on the inside. In this case, the outer drape curtains are similar to the inner curtains (second shading material) 31, 32, and the inner lace curtains are similar to the outer curtains 11, 12, and the third state can be set to fully open and fully closed, respectively, to achieve similar operation. In this case, sunlight intake and visibility from outside can be similarly controlled. Generally, drape curtains are more expensive than lace curtains. In this case, however, the drape curtains are less noticeable to users inside the room (such as hotel guests). Therefore, for example, inexpensive drape curtains with high light-blocking properties but low texture can be used. In this way, which of the first and second shielding materials is placed on the window side (or on the indoor side) (or which side is fully closed (fully open) in the third state) can be set appropriately depending on the environment in which it is used, the type of curtain, etc.

[0044] In the above example, lace curtains and drape curtains are used in combination as shielding materials that open and close horizontally, as shown in Figure 1. However, the above structure can also be used in combinations of shielding materials that open and close vertically (for example, a combination of Roman shades, or a combination of Roman shades and roller blinds). In this case, while one first shielding material and one second shielding material are provided on each side in the above example, a configuration in which one first shielding material and one second shielding material are provided may also be used, and in this case, the same operation is possible.

[0045] In these cases, the mechanism for opening and closing the runner-based mechanism can be one that is used to electrically control the opening and closing of the runner-based mechanism. Even in this case, the operation can be made extremely easy by performing the above-described operation. The types of first and second shielding materials to be used can be optimized depending on the operation and purpose. [Explanation of symbols]

[0046] 1 Electric shading device (double curtain) 11, 12 Outer curtain (lace curtain: first shielding material) 21 Rail (First Rail) 31, 32 Inner curtain (drape curtain: second shielding material) 41 Rail (Second Rail) 51, 52, 61, 62 Runners 51A, 52A Leading runner (first driving runner) 61A, 62A Leading runner (second driving runner) 71 Motor (First motor: outer motor) 72 Motor (Second Motor: Inner Motor) 73~76 Pulley 80 Control Unit 90 Operation section 90A "Close" button (first switch) 90B "Open" button (second switch) 90C "Race" button (third switch) 91 Remote control transmitter (operation unit) 200 Connection part 210 base W1, W2 drive wires

Claims

1. An electric shading device in which the opening and closing operations of a first shielding material and a second shielding material, both of which are controlled by an in-plane movement and which are installed substantially parallel to and spaced apart from each other in a direction perpendicular to the in-plane direction, are controlled by a motor, a first state in which the first shielding material and the second shielding material are both fully closed; a second state in which the first shielding material and the second shielding material are both fully opened; and a third state in which the first shielding material is fully closed and the second shielding material is fully open. is set, an operation unit provided with a first switch, a second switch, and a third switch corresponding to the first state, the second state, and the third state, respectively; a control unit that, when any one of the first to third switches is operated by the operation unit while the motor is stopped, drives the motor so as to realize any one of the first to third states corresponding to any one of the first to third switches that has been operated; An electric shading device comprising:

2. The electric shading device according to claim 1, characterized in that the control unit stops the motor when any of the first to third switches is operated on the operating unit while the motor is operating.

3. 3. The electric shading device according to claim 1, wherein the first shading material is a lace curtain and the second shading material is a drape curtain.

4. A control method for an electric shading device in which opening and closing operations of a first shielding material and a second shielding material, both of which are controlled by an in-plane movement and which are installed substantially parallel to and spaced apart from each other in a direction perpendicular to the in-plane direction, are controlled by a motor, a first state in which the first shielding material and the second shielding material are both fully closed; a second state in which both the first shielding material and the second shielding material are fully opened; and a third state in which the first shielding material is fully closed and the second shielding material is fully open. is set, an operation unit provided with a first switch, a second switch, and a third switch corresponding to the first state, the second state, and the third state, respectively; A control method for an electric shading device, characterized in that when any of the first to third switches is operated while the motor is stopped, the motor is driven so as to realize any of the first to third states corresponding to any of the first to third switches that was operated.

5. The control method for an electric shading device according to claim 4, characterized in that, when any of the first to third switches is operated while the motor is operating, the motor is stopped.

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