BLIND

Abstract

To provide a blind capable of switching exposure ratio and being opened by lifting up / down two vertically consecutive shielding materials with an inexpensive configuration.SOLUTION: A blind 100 has a head box 110, a slat 120 hung from the head box so as to be liftable / lowerable, an intermediate bar 130 disposed on a bottom end of the slat, and a honeycomb screen 170 hung below the slat through the intermediate bar. The intermediate bar is configured to have an upper bar member 140 with which the bottom end of the slat and a bottom end of a lifting cord 180 suspended from the head box so as to be movable upward and downward are coupled, a lower bar member 150 with which an upper end of the honeycomb screen is coupled, and a coupling means 160 capable of switching between coupling and coupling release between the upper bar member and a lower bar member. Consequently, the blind capable of switching exposure ratio and being opened by lifting up / down two vertically consecutive shielding materials can be provided with an inexpensive configuration.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a blind.

Background Art

[0002] As a conventional blind, there is an electric blind disclosed in Japanese Patent Application Laid-Open No. 2011-111763 (Patent Document 1). The electric blind disclosed in this document is disclosed such that a first shielding material and a second shielding material can be independently opened and closed by the driving force of a first motor and a second motor, respectively. When the second motor is operated to move the second shielding material in the opening direction, the first motor is operated to move the end portion of the first shielding material in conjunction with the end portion of the second shielding material.

[0003] According to this, when an intermediate rail connecting the first shielding material and the second shielding material is lifted by the driving of the first motor, the exposure ratio of the first shielding material and the second shielding material can be changed. Further, when a bottom rail connected to the lower end of the second shielding material is lifted by the driving of the second motor and the bottom rail contacts the intermediate rail, the intermediate rail is interlocked and lifted to open the opening.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, conventional electric blinds, such as those disclosed in Patent Document 1, require a first drive system to raise and lower an intermediate rail and a second drive system to raise and lower a bottom rail in order to enable the aforementioned changes in exposure ratio and opening of the opening. This is true not only for electric blinds but also for manually operated blinds. Blinds equipped with such two drive systems are inevitably expensive, so there has been a demand for a blind that enables the aforementioned changes in exposure ratio and opening of the opening in an inexpensive configuration.

[0006] Therefore, the present invention has been made in view of these problems, and its objective is to provide a blind that allows switching and opening of the exposure ratio by raising and lowering two vertically continuous shielding materials with an inexpensive configuration. [Means for solving the problem]

[0007] To solve the above problems, the present invention provides a blind comprising a headbox, a first shielding member suspended from the headbox so as to be able to move up and down, an intermediate bar connected to the lower end of the first shielding member, and a second shielding member suspended below the first shielding member via the intermediate bar, wherein the intermediate bar comprises an upper bar member to which the lower end of the first shielding member and the lower end of a lifting cord that hangs down from the headbox are connected, a lower bar member to which the upper end of the second shielding member is connected, and a coupling means that can switch between coupling and uncoupling the upper bar member and the lower bar member.

[0008] This configuration allows for switching and opening the exposure ratio by raising and lowering two vertically continuous shielding materials, without requiring two drive systems, resulting in an inexpensive setup.

[0009] The present invention has various applications. For example, the coupling means is interposed between the upper bar and the lower bar and has a first coupling portion that can be connected to at least the upper bar and the lower bar, and a second coupling portion that can be connected to at least the lower bar and the upper bar, and at least one of the first coupling portion and the second coupling portion can be detachably connected to at least one of the upper bar and the lower bar. With such a configuration, the coupling and uncoupling of the upper bar and the lower bar can be switched using a simple coupling means.

[0010] Furthermore, the coupling means may be an elastic member that can be elastically deformed so that at least one of the first coupling portion and the second coupling portion can be detachably attached to at least one of the upper bar material and the lower bar material. With such a configuration, the coupling and uncoupling of the upper bar material and the lower bar material can be switched using a simple coupling means.

[0011] Furthermore, the coupling means may have a pair of operating parts that protrude from one side and the other side in the short direction of the intermediate bar so as to be pressable from the one side and the other side, and when the operating parts are pressed, at least one of the first coupling part and the second coupling part may be elastically deformed so as to become detachably attached to at least one of the upper bar material and the lower bar material. With such a configuration, the workability when switching between coupling and uncoupling the upper bar material and the lower bar material is improved.

[0012] Furthermore, the upper bar material and the lower bar material may have openings on the surfaces facing the connecting means, and at least one of the first connecting portion and the second connecting portion may be a pair of claw portions that tilt to fit into and release from the opening in accordance with the elastic deformation. With this configuration, the claw portions can be fitted into the openings of the bar materials simply by overlapping the upper bar material and the lower bar material and sandwiching the connecting means, so the two bar materials can be easily joined. In particular, when multiple connecting means are provided along the longitudinal direction of the bar material, it becomes unnecessary to operate each connecting means one by one, so the two bar materials can be joined even more easily.

[0013] Furthermore, the opening is a rail-shaped opening formed along the longitudinal direction of the intermediate bar, the first connecting portion is a pair of claw portions that can be detachably connected to the opening, and the second connecting portion may be protruding portions that project outwards to one side and the other side in the short direction and can be slid into the opening. With this configuration, the connecting means can be pre-connected to one bar material, making it easier to connect to and disconnect from the other bar material.

[0014] Furthermore, the upper bar material and the lower bar material may be bar materials of the same shape. With such a configuration, parts can be standardized. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a blind that allows switching and opening of the exposure ratio by raising and lowering two vertically continuous shielding materials with an inexpensive configuration. Other effects of the present invention will be explained in the embodiments for carrying out the invention described later. [Brief explanation of the drawing]

[0016] [Figure 1] This is a front view of an electric blind 100 according to one embodiment of the present invention. [Figure 2] This diagram illustrates the intermediate bar 130; (a) is an exploded perspective view, and (b) is a perspective view showing the assembled state. [Figure 3] This is a cross-sectional view near the intermediate bar 130. [Figure 4] These are cross-sectional views illustrating the operation of the intermediate bar 130. (a) shows the state in which the upper bar material 140 and the lower bar material 150 are joined together. (b) shows the state in which the operating part 163 is operated. (c) shows the state in which the slats 120 are folded in. (d) shows the state in which the upper bar material 140 and the lower bar material 150 are joined together. (e) shows the state in which the upper bar material 140 and the lower bar material 150 are joined together and the slats 120 are folded in. [Figure 5] It is a diagram for explaining the operation of the electric blind 100. (a) shows the state where the intermediate bar 130 is at the upper limit position, (b) shows the state where the intermediate bar 130 is in the process of ascending and descending, (c) shows the state where the intermediate bar 130 is at the lower limit position, (d) shows the state where the connection between the upper bar material 140 and the lower bar material 150 is released, (e) shows the state where the upper bar material 140 ascends and descends together with the slats 120, and (f) shows the state where the upper bar material 140 is at the upper limit position together with the slats 120. [Figure 6] It is a front view of the electric blind 100 showing the state where the intermediate bar 130 is at the upper limit position. [Figure 7] It is a front view of the electric blind 100 showing the state where the intermediate bar 130 is at the lower limit position. [Figure 8] It is a front view of the electric blind 100 showing the state where the upper bar material 140 is at the upper limit position together with the slats 120. [Figure 9] It is a diagram for explaining an example of use of the electric blind 100. (a) shows the state in the solar radiation shielding mode, (b) shows the state in the daylight utilization mode 1, (c) shows the state in the daylight utilization mode 2, (d) shows the state in the heat insulation mode, and (e) shows the state in the open mode.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, for components having substantially the same functional configuration, the same reference numerals are given and redundant explanations are omitted.

[0018] The electric blind 100 will be described as a blind according to an embodiment of the present invention. First, the configuration of the electric blind 100 will be described with reference to FIG. 1. FIG. 1 is a front view of the electric blind 100 of this embodiment.

[0019] As shown in Fig. 1, the electric blind 100 includes a head box 110, a slat (first shielding material) 120 suspended from the head box 110 by a ladder cord 190 so as to be movable up and down, an intermediate bar 130 provided at the lower end of the slat 120, and a honeycomb screen (second shielding material) 170 suspended below the slat 120 via the intermediate bar 130. The intermediate bar 130 includes an upper bar member 140 to which the lower end of the ladder cord 190 (the lower end of the slat 120) and the lower end of a lift cord 180 that can move up and down and hangs down from the head box 110 are connected, a lower bar member 150 to which the upper end of the honeycomb screen 170 is connected, and a coupling means 160 capable of switching between coupling and decoupling of the upper bar member 140 and the lower bar member 150. Hereinafter, each component will be described.

[0020] As shown in Fig. 1, the head box 110 is fixed to a window frame, ceiling, etc. not shown via a bracket BK. Inside the head box 110, as a mechanism for moving the slat 120 up and down, there are provided a lift drum 111 to which the upper end of the lift cord 180 is connected so as to be wound and unwound, a first motor 112 for rotationally driving the lift drum 111, and a first rotating shaft 113 for transmitting the driving force of the first motor 112 to the lift drum 111.

[0021] Also, inside the head box 110, as a mechanism for opening and closing the slat 120, there are provided a rotating drum 114 to which a ladder cord 190 for opening and closing the slat 120 is connected so as to be tiltable, a second motor 115 for rotationally driving the rotating drum 114, and a second rotating shaft 116 for transmitting the driving force of the second motor 115 to the rotating drum 114.

[0022] Furthermore, inside the head box 110, there are provided a drive unit 117 for driving the first motor 112 and the second motor 115, a control unit 118 for controlling the drive of the drive unit 117, and a switching power supply 119 for converting AC power from a commercial power supply into DC power for each of the motor and the control unit.

[0023] The slats 120 are shielding material that closes the opening. As shown in Figure 1, the slats 120 are supported by ladder cords 190 that hang down from the headbox 110. The slats 120 and ladder cords 190 form the first shielding material. The slats 120 rotate due to the tilting of the ladder cords 190, opening and closing the opening. The slats 120 move up and down by the raising and lowering of the lifting cords 180, changing the proportion of the opening occupied by the slats 120.

[0024] As shown in Figure 1, the intermediate bar 130 is provided between the lower end of the ladder cord 190 and the upper end of the honeycomb screen 170, and connects and disconnects the slats 120 and the honeycomb screen 170. The detailed configuration of the intermediate bar 130 will be described later.

[0025] The honeycomb screen 170 is a shielding material that closes the opening. As shown in Figure 1, the upper end of the honeycomb screen 170 is suspended below the slats 120 via an intermediate bar 130. A bottom rail 171 is provided at the lower end of the honeycomb screen 170. The honeycomb screen 170 and the bottom rail 171 form a second shielding material. The lower surface of the bottom rail 171 is placed on a bottom rail support 172 to prevent interference with the guide wire fixing device 174, which will be described later.

[0026] The honeycomb screen 170 is restricted from tilting in the front-to-back direction, especially when folded, by a guide wire 173 that hangs down from the headbox 110. The lower end of the guide wire 173 is connected to a fixed surface such as the floor via a guide wire fastener 174, passing through the slats 120, intermediate bar 130, honeycomb screen 170, and bottom rail 171.

[0027] The intermediate bar 130, a characteristic component of this embodiment, will be described with reference to Figures 2 and 3. Figure 2 is a diagram illustrating the intermediate bar 130, where (a) is an exploded perspective view and (b) is a perspective view showing the assembled state. Figure 3 is a cross-sectional view of the vicinity of the intermediate bar 130.

[0028] The intermediate bar 130 is comprised of an upper bar member 140 to which the lower end of the ladder cord 190 (the lower end of the slat 120) and the lower end of the liftable lifting cord 180 hanging from the headbox 110 are connected, a lower bar member 150 to which the upper end of the honeycomb screen 170 is connected, and a coupling means 160 that can switch between connecting and disconnecting the upper bar member 140 and the lower bar member 150. The upper bar member 140 and the lower bar member 150 are bar members of the same shape.

[0029] (Upper bar material 140) The upper bar member 140 is connected to the lower end of the ladder cord 190 (the lower end of the slat 120) and the lower end of the lifting cord 180 that hangs down from the headbox 110. As shown in Figure 2, the upper bar member 140 is constructed in a roughly H shape by front and rear wall sections 141 and a plate-like section 142 that spans the front and rear wall sections 141. The upper and lower ends of the wall section 141 are bent in opposing directions to form rail-shaped upper openings 143 and lower openings 144 along the longitudinal direction.

[0030] As shown in Figure 3, the lower ends of the slats 120 and ladder cords 190 are inserted into the upper opening 143, with the lower end of the ladder cords 190 passing through the plate-like portion 142 and being attached to the lower surface of the plate-like portion 142. In addition, the lower end of the lifting cord 180 is inserted into the upper opening 143, passes through the plate-like portion 142, and is attached to the lower surface of the plate-like portion 142 via a cord holder 182.

[0031] (Lower bar material 150) The lower bar member 150 is connected to the upper end of the honeycomb screen 170. The lower bar member 150 has the same shape as the upper bar member 140, and as shown in Figure 2, it is constructed to have front and rear wall sections 151, plate-like sections 152, an upper opening 153, and a lower opening 154, similar to the upper bar member 140.

[0032] As shown in Figure 3, a mounting member 174 attached to the upper end of the honeycomb screen 170 is inserted into the lower opening 154 and secured to the front and rear wall sections 151. Thus, the upper end of the honeycomb screen 170 is attached to the lower bar material 150.

[0033] (Coupling means 160) The coupling means 160 is capable of switching between coupling and uncoupling the upper bar member 140 and the lower bar member 150. As shown in Figures 2 and 3, the coupling means 160 is interposed between the upper bar member 140 and the lower bar member 150 and includes a claw portion 161 (first coupling portion) that can be connected to the upper bar member 140, a protruding portion 162 (second coupling portion) that can be connected to the lower bar member 150, and an operating portion 163 for releasing the coupling between the upper bar member 140 and the claw portion 161. As will be described later, the coupling means 160 is made of an elastic member that can be elastically deformed so that the claw portion 161 can be detachably attached to the upper bar member 140.

[0034] As shown in Figures 2 and 3, the claw portions 161 are formed in pairs so as to protrude upward from near both sides in the short direction. The claw portions 161 can be detachably connected to both ends of the lower opening 144 of the upper bar material 140. The pair of claw portions 161 tilt toward each other in a manner that allows them to be fitted and unfitted to both ends of the lower opening 144 as they undergo elastic deformation. The sides of the claw portions 161 are formed as inclined surfaces 161a that protrude laterally as they go downward. The inclined surfaces 161a promote elastic deformation so that the pair of claw portions 161 tilt toward each other when the ends of the lower opening 144 come into contact with the claw portions 161 when they are engaged with the lower opening 144.

[0035] As shown in Figures 2 and 3, the protruding portions 162 are formed in pairs so as to protrude on both sides in the short direction. The protruding portions 162 can be slid into the upper opening 153 of the lower bar material 150. When the protruding portions 162 are inserted into the upper opening 153, they abut against both ends of the upper opening 153, restricting their upward movement. In addition, a lower projection 164 protrudes downward from the lower part of the protruding portion 162, which abuts against the plate-like portion 152 of the lower bar material 150. The downward movement of the protruding portion 162 is restricted by the lower projection 164 abutting against the plate-like portion 152.

[0036] As shown in Figures 2 and 3, the operating section 163 is formed in a pair, projecting in a roughly T-shape from an intermediate vertical position of the claw section 161 to one side and the other side in the shorter direction. The pair of claw sections 161 can be pressed together in a direction that brings them closer to each other. When the operating section 163 is pressed, the claw section 161 elastically deforms so that it can be detachably attached to the upper bar material 140.

[0037] The configuration of the intermediate bar 130 has been explained above. The operation of the intermediate bar 130 will now be explained with reference to Figure 4. Figure 4 is a cross-sectional view illustrating the operation of the intermediate bar 130, where (a) shows the state in which the upper bar material 140 and the lower bar material 150 are joined, (b) shows the state in which the operating part 163 is operated, (c) shows the state in which the slats 120 are folded, (d) shows the state in which the upper bar material 140 and the lower bar material 150 are joined, (e) shows the state in which the upper bar material 140 and the lower bar material 150 are joined, and (f) shows the state in which the upper bar material 140 and the lower bar material 150 are joined and the slats 120 are folded.

[0038] When the upper bar member 140 and the lower bar member 150 are joined together, as shown in Figure 4(a), the claw portion 161 of the joining means 160 is fitted into both ends of the lower opening 144 of the upper bar member 140.

[0039] To release the connection between the upper bar 140 and the lower bar 150, the pair of operating parts 163 are pressed toward each other, as shown by arrow a in Figure 4(b). The pair of claws 161 then elastically deform, tilting toward each other, releasing the engagement with the upper bar 140. Thus, the connection between the upper bar 140 and the lower bar 150 is released. When the slat 120 is folded in, only the slat 120 and the upper bar 140 rise, as shown by arrow b in Figure 4(c). The honeycomb screen 170, the lower bar 150, and the connecting means 160 are held in the folded state of the honeycomb screen 170.

[0040] When joining the upper bar member 140 and the lower bar member 150, the slat 120 and the upper bar member 140 are lowered to their lowest positions, as shown by arrow c in Figure 4(d). Then, with both ends of the lower opening 144 of the upper bar member 140 in contact with the pair of claw portions 161, the upper bar member 140 is pressed downward. As a result, both ends of the lower opening 144 of the upper bar member 140 press against the pair of claw portions 161 along the slope 161a. Therefore, the pair of claw portions 161 elastically deform so that they tilt toward each other, as shown by arrow d in the figure.

[0041] When both ends of the lower opening 144 of the upper bar member 140 overcome the slope 161a, the pair of claw portions 161 elastically deform in a direction that separates them from each other, as shown in Figure 4(e), and fit into both ends of the lower opening 144. Thus, the upper bar member 140 and the lower bar member 150 are joined together. Note that the above operation of fitting the pair of claw portions 161 into both ends of the lower opening 144 can be performed one by one for multiple joining means 160, but it can also be performed simultaneously for multiple joining means 160 by sandwiching multiple joining means 160 between the upper bar member 140 and the lower bar member 163 and pressing multiple points in the longitudinal direction simultaneously.

[0042] When the slats 120 are folded with the upper bar 140 and lower bar 150 joined together, the joining means 160 and the lower bar 150 rise together with the upper bar 140, as shown by arrow e in Figure 4(f). Thus, the honeycomb screen 170 unfolds.

[0043] The configuration of the electric blind 100 of this embodiment has been described above. The operation of the electric blind 100 will now be described with reference to Figures 5 to 8. Figure 5 is a diagram illustrating the operation of the electric blind 100. Figure 6 is a front view of the electric blind 100 showing the intermediate bar 130 in its upper limit position. Figure 7 is a front view of the electric blind 100 showing the intermediate bar 130 in its lower limit position. Figure 8 is a front view of the electric blind 100 showing the upper bar material 140 together with the slats 120 in their upper limit position.

[0044] When the intermediate bar 130 is raised to its upper limit, the slats 120 are folded in, and the honeycomb screen 170 is unfolded, as shown in Figures 5(a) and 6. Therefore, the opening is closed by the honeycomb screen 170, which contributes to improved insulation at night in offices and other similar spaces.

[0045] The first motor 112 drives the lifting drum 111, causing the lifting cord 180 to move up and down. When the intermediate bar 130 is in the process of moving up or down, as shown in Figure 5(b), parts of the slats 120 and honeycomb screen 170 are deployed. The position of the intermediate bar 130 changes the proportion of the slats 120 and honeycomb screen 170 that are deployed. Therefore, the exposure ratio of the slats 120 and honeycomb screen 170 at the opening can be changed.

[0046] When the intermediate bar 130 is lowered to its lowest position, the exposure ratio of the slats 120 is maximized, as shown in Figures 5(c) and 7. At this time, the honeycomb screen 170 is folded up. Therefore, in offices and other similar spaces, the angle of the slats 120 can be adjusted to control sunlight.

[0047] By pressing the operating part 163 to release the engagement between the claw part 161 and the upper bar member 140, the connection between the upper bar member 140 and the lower bar member 150 is released, as shown in Figure 5(d). As a result, the slat 120 can be raised and lowered independently.

[0048] With the upper bar 140 and lower bar 150 disconnected, the lifting drum 111 rotates due to the drive of the first motor 112, causing the lifting cord 180 to move up and down. When the upper bar 140 is raised or lowered, the slats 120 are folded in, as shown in Figure 5(e). Meanwhile, the honeycomb screen 170 remains folded. As a result, the space between the upper bar 140 and the lower bar 150 is opened.

[0049] When the upper bar 140 is pulled up to its upper end, it becomes fully open, as shown in Figures 5(f) and 8. Thus, the opening is opened to its maximum extent.

[0050] The operation of the electric blind 100 has been explained above. Below, examples of how to use the electric blind 100 will be explained with reference to Figure 9. Figure 9 is a diagram illustrating examples of how to use the electric blind 100, where (a) shows the state of sun shading mode, (b) shows the state of daylight utilization mode 1, (c) shows the state of daylight utilization mode 2, (d) shows the state of heat insulation mode, and (e) shows the state of open mode.

[0051] Solar shading mode: As shown in Figure 9(a), the intermediate bar 130 is lowered and the honeycomb screen 170 is folded, and solar shading is performed by rotating the slats 120.

[0052] Daylight utilization mode 1: As shown in Figure 9(b), the intermediate bar 130 is lowered and the honeycomb screen 170 is folded down, and the slats 120 are set to a nearly horizontal angle to let in daylight and obtain a view.

[0053] Daylight utilization mode 2: As shown in Figure 9(c), the intermediate bar 130 is raised to an intermediate height, the honeycomb screen 170 at the bottom cuts off sunlight and outside views, and daylight is taken in through the slats 120 at the top.

[0054] Insulation mode: As shown in Figure 9(d), when solar radiation cannot be utilized, such as at night or on cloudy days in winter, the intermediate bar 130 is raised, the slats 120 are folded in, and the honeycomb screen 170 is deployed to improve insulation performance.

[0055] Open Mode: As shown in Figure 9(e), when you want to achieve a sense of openness or when maintenance such as cleaning the glass surface is required, the coupling means 160 releases the connection between the upper bar 140 and the lower bar 150, and then the upper bar 140 is raised. As a result, the slats 120 fold up and rise together with the upper bar 140, while the honeycomb screen 170 remains folded. Thus, the space between the upper bar 140 and the lower bar 150 is opened. When the slats 120 are completely folded, the opening is opened to its maximum extent.

[0056] (Effects of this embodiment) As described above, this embodiment allows for switching and opening of the exposure ratio by raising and lowering the vertically continuous slats 120 and honeycomb screen 170 in an inexpensive configuration that does not require two drive systems.

[0057] Furthermore, the connection and disconnection of the upper bar material 140 and the lower bar material 150 can be switched using a simple connecting means 160.

[0058] Furthermore, since connecting and disconnecting the upper bar material 140 and the lower bar material 150 only requires pressing the operating part 163 of the connecting means 160, the workability when switching between connecting and disconnecting the upper bar material 140 and the lower bar material 150 is improved.

[0059] Furthermore, since the claw portion 161 can be fitted into the upper opening 143 of the upper bar material 140 simply by overlapping the upper bar material 140 and the lower bar material 150 and sandwiching the connecting means 160, the upper bar material 140 and the lower bar material 150 can be easily joined. In particular, if multiple connecting means 160 are provided along the longitudinal direction of the upper bar material 140 and the lower bar material 150, it becomes unnecessary to operate each connecting means 160 individually, making it even easier to join the upper bar material 140 and the lower bar material 150.

[0060] Furthermore, since the connecting means 160 can be pre-connected to the lower bar member 150, connecting to and disconnecting from the upper bar member 140 becomes easier.

[0061] Furthermore, by making the upper bar material 140 and the lower bar material 150 the same shape, parts can be standardized.

[0062] Preferred embodiments of the present invention have been described above with reference to the attached drawings, but it goes without saying that the present invention is not limited to these examples. It will be obvious to those skilled in the art that various modifications or alterations can be conceived within the scope of the claims, and these will naturally also fall within the technical scope of the present invention.

[0063] For example, in the above embodiment, the coupling means 160 is detachably connected to the upper bar member 140, but the present invention is not limited to this example. For example, the coupling means may be detachably connected to the lower bar member, or it may be detachably connected to both the upper and lower bar members.

[0064] Furthermore, in the above embodiment, the coupling means 160 is an elastic member that can be elastically deformed so that the claw portion 161 can be detachably attached to the upper bar material 140, but the present invention is not limited to this example. For example, the coupling means may be configured to be detachably attached to at least one of the upper bar material and the lower bar material without elastic deformation.

[0065] Furthermore, in the above embodiment, the coupling means 160 is elastically deformed so as to be detachably attached to the upper bar material 140 by pressing the pair of operating parts 163, but the present invention is not limited to this example. There may be just one operating part, and the configuration for elastically deforming the coupling means can be designed arbitrarily.

[0066] Furthermore, in the above embodiment, the coupling means 160 was made of separate components from the upper bar material 140 and the lower bar material 150, but the present invention is not limited to this example. Any configuration in which the upper bar material and the lower bar material are joined by a coupling means can be designed. For example, the coupling means may not be a separate component but may be integrated with either the upper bar material or the lower bar material.

[0067] Furthermore, although the upper bar material 140 and the lower bar material 150 are bar materials of the same shape in the above embodiment, the present invention is not limited to this example. The shapes of the upper bar material and the lower bar material can be designed arbitrarily.

[0068] Furthermore, although the intermediate bar 130 is provided on the electric blind 100 in the above embodiment, it may also be provided on a blind that is operated manually via an operating member.

[0069] The embodiments, applications, and modifications described above can be combined as appropriate. [Explanation of Symbols]

[0070] 100 Electric Blinds 110 Headbox 111 Lifting Drum 112 First Motor 113 First rotation axis 114 RPM drum 115 Second Motor 116 Second rotation axis 117 Drive Unit 118 Control Unit 119 Switching Power Supply 120 slats (first shielding material) 130 Intermediate bar 140 Upper bar material 141 Wall 142 Plate-like part 143 Upper opening 144 Lower opening 150 Lower bar material 151 Wall 152 Plate-like part 153 Upper opening 154 Lower opening 160 Coupling means 161 Claw part (1st connection part) 161a Slope 162 Projection part (second connection part) 163 Operation section 164 Lower protrusion 170 Honeycomb Screen (Second Shielding Material) 171 Bottom rail (second shielding material) 172 Cushioning material 173 Guidewire 174 Mounting components 180 Lifting cord 182 Code Holder 190 Ladder cord (first shielding material) BK Bracket

Claims

1. Headbox and, A first shielding material suspended from the headbox so as to be able to move up and down, An intermediate bar connected to the lower end of the first shielding material, A second shielding material suspended below the first shielding material via the intermediate bar, A blind equipped with, The aforementioned intermediate bar is An upper bar member to which the lower end of the first shielding material and the lower end of the liftable cord hanging down from the headbox are connected, The upper end of the second shielding material is connected to a lower bar material, A coupling means that can switch between coupling and uncoupling the upper bar member and the lower bar member, A blind characterized by having the following features.

2. The coupling means is interposed between the upper bar member and the lower bar member and has a first coupling portion that can be connected to at least the upper bar member among the upper bar member and the lower bar member, and a second coupling portion that can be connected to at least the lower bar member among the upper bar member and the lower bar member. The blind according to claim 1, characterized in that at least one of the first connecting portion and the second connecting portion is detachably connected to at least one of the upper bar material and the lower bar material.

3. The blind according to claim 2, characterized in that the connecting means is an elastic member that can be elastically deformed so that at least one of the first connecting portion and the second connecting portion can be detachably attached to at least one of the upper bar material and the lower bar material.

4. The coupling means has a pair of operating parts that protrude from one side and the other side in the short direction of the intermediate bar so as to be pressable from one side and the other side, The blind according to claim 3, characterized in that when the operating part is pressed, at least one of the first connecting part and the second connecting part is elastically deformed so as to become detachably attached to at least one of the upper bar material and the lower bar material.

5. The upper bar member and the lower bar member have openings on the surfaces facing the connecting means, The blind according to claim 3, characterized in that at least one of the first connecting portion and the second connecting portion is a pair of claw portions that tilt in a manner that allows them to be fitted into and unfitted into the opening as a result of elastic deformation.

6. The aforementioned opening is a rail-shaped opening formed along the longitudinal direction of the intermediate bar, The first connecting portion is a pair of claw portions that can be detachably connected to the opening, The blind according to claim 5, characterized in that the second connecting portion is a protruding portion that protrudes to one side and the other side in the short direction and is slidable into the opening.

7. The blind according to any one of claims 1 to 6, characterized in that the upper bar material and the lower bar material are bar materials of the same shape.

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