JP2024092865A - Blind - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to blinds.

An example of a conventional blind is the electric blind disclosed in JP 2011-111763 A (Patent Document 1). The electric blind disclosed in this document is capable of opening and closing a first shielding material and a second shielding material independently using the driving forces of a first 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 of the first shielding material in conjunction with the end of the second shielding material.

With this, when the intermediate rail connecting the first shielding material and the second shielding material is raised and lowered by the drive of the first motor, the exposed ratio of the first shielding material to the second shielding material can be changed. In addition, the bottom rail connected to the lower end of the second shielding material is raised by the drive of the second motor, and when the bottom rail comes into contact with the intermediate rail, the intermediate rail rises in conjunction with the rise, opening the opening.

JP 2011-111763 A

Meanwhile, conventional motorized blinds such as those disclosed in Patent Document 1 require a first drive system for raising and lowering the middle rail and a second drive system for raising and lowering the bottom rail in order to enable the aforementioned change in exposure ratio and opening of the opening. This is true not only for motorized blinds, but also for blinds that are operated manually. Since blinds equipped with such two drive systems are inevitably expensive, there has been a demand for an inexpensive blind that enables the aforementioned change in exposure ratio and opening of the opening.

The present invention was made in consideration of these problems, and its purpose is to provide a blind that is inexpensive and allows the exposure ratio to be changed and the blind to be opened by raising and lowering two vertically connected shielding materials.

In order to solve the above problems, the present invention provides a blind comprising a head box, a first shielding material suspended from the head box so as to be liftable and lowerable, an intermediate bar connected to the lower end of the first shielding material, and a second shielding material suspended below the first shielding material via the intermediate bar, characterized in that the intermediate bar comprises an upper bar material to which the lower end of the first shielding material and the lower end of a lift cord that is liftable and lowerable and hangs down from the head box are connected, a lower bar material to which the upper end of the second shielding material is connected, and a connecting means that can switch between connecting and disconnecting the upper bar material and the lower bar material.

This configuration makes it possible to change the exposure ratio and release by raising and lowering two vertically connected shielding materials with an inexpensive configuration that does not require two drive systems.

The present invention can be applied in various ways. For example, the connecting means is interposed between the upper bar material and the lower bar material, and has a first connecting part that can be connected to at least the upper bar material of the upper bar material and the lower bar material, and a second connecting part that can be connected to at least the lower bar material of the upper bar material and the lower bar material, and at least one of the first connecting part and the second connecting part may be detachably connected to at least one of the upper bar material and the lower bar material. With this configuration, the upper bar material and the lower bar material can be connected and disconnected by switching using a simple connecting means.

The connecting means may be an elastic member that is elastically deformable so that at least one of the first connecting portion and the second connecting portion can be attached and detached to at least one of the upper bar material and the lower bar material. With this configuration, the upper bar material and the lower bar material can be connected and disconnected by a simple connecting means.

The connecting 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 in a manner that allows them to be pressed from the one side and the other side, and at least one of the first connecting part and the second connecting part may be elastically deformed by pressing the operating parts so as to be detachable from at least one of the upper bar material and the lower bar material. This configuration improves the operability when switching between connecting and disconnecting the upper bar material and the lower bar material.

The upper bar material and the lower bar material may have openings on the surfaces facing the joining means, and at least one of the first connecting portion and the second connecting portion may be a pair of claw portions that tilt in response to the elastic deformation so as to be able to engage and disengage with the openings. With this configuration, the claw portions can be engaged with the openings of the bar materials simply by overlapping the upper bar material and the lower bar material and sandwiching the joining means, so that the two bar materials can be joined easily. In particular, when multiple joining means are provided along the longitudinal direction of the bar materials, it is not necessary to operate the joining means one by one, so that the two bar materials can be joined more easily.

The opening may be a rail-shaped opening formed along the longitudinal direction of the intermediate bar, the first connecting portion may be a pair of claw portions that can be detachably connected to the opening, and the second connecting portion may be a protruding portion that protrudes to one side and the other side in the lateral direction and can be slidably inserted into the opening. With this configuration, the connecting means can be connected to one bar material in advance, making it easier to connect and disconnect the connecting means to the other bar material.

The upper bar material and the lower bar material may be bar materials of the same shape. With this configuration, parts can be standardized.

The present invention provides a blind that can be opened and the exposure ratio can be changed by raising and lowering two vertically connected shielding materials with an inexpensive structure. Other advantages of the present invention will be described in the description of the embodiment of the invention below.

1 is a front view of an electric blind 100 according to an embodiment of the present invention. 5A and 5B are diagrams for explaining an intermediate bar 130, in which FIG. 5A is an exploded perspective view, and FIG. 5B is a perspective view showing the intermediate bar 130 in an assembled state. 1 is a cross-sectional view of the vicinity of the intermediate bar 130. FIG. 11A and 11B are cross-sectional views for explaining the function of the intermediate bar 130, in which (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 unit 163 is operated, (c) shows the state in which the slat 120 is being folded, (d) shows the state in which the upper bar material 140 and the lower bar material 150 are in the middle of being 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 slat 120 is folded. 1A and 1B are diagrams for explaining the operation of the electric blind 100, in which (a) shows the intermediate bar 130 in the uppermost position, (b) shows the intermediate bar 130 in the middle of rising or falling, (c) shows the intermediate bar 130 in the lowermost position, (d) shows the upper bar material 140 and the lower bar material 150 when they are disconnected, (e) shows the upper bar material 140 rising and falling together with the slats 120, and (f) shows the upper bar material 140 in the uppermost position together with the slats 120. FIG. 2 is a front view of the electric blind 100 showing the intermediate bar 130 in the upper limit position. 1 is a front view of the electric blind 100 showing the intermediate bar 130 in the lowermost position. A front view of the electric blind 100 showing the state in which the upper bar material 140 together with the slats 120 are in the upper limit position. FIG. 1 is a diagram for explaining an example of how to use the electric blind 100, where (a) shows the solar shading mode, (b) shows the daylight utilization mode 1, (c) shows the daylight utilization mode 2, (d) shows the insulation mode, and (e) shows the open mode.

A preferred embodiment of the present invention will be described in detail below with reference to the attached drawings. Note that in this specification and drawings, components having substantially the same functional configuration are designated by the same reference numerals to avoid redundant description.

The following describes an electric blind 100 as a blind according to one 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 according to this embodiment.

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 able to rise and fall, 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 material 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 be raised and lowered and hangs down from the head box 110 are connected, a lower bar material 150 to which the upper end of the honeycomb screen 170 is connected, and a connecting means 160 that can switch between connecting and disconnecting the upper bar material 140 and the lower bar material 150. Each component will be described below.

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, there are provided a mechanism for raising and lowering the slats 120, which includes a lifting drum 111 to which the upper end of the lifting cord 180 is connected so as to be capable of being wound and unwound, a first motor 112 that drives the rotation of the lifting drum 111, and a first rotating shaft 113 that transmits the driving force of the first motor 112 to the lifting drum 111.

In addition, within the head box 110, there are provided a mechanism for opening and closing the slats 120, which includes a rotating drum 114 to which a ladder cord 190 for opening and closing the slats 120 is tiltably connected, a second motor 115 for driving the rotation of 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.

Furthermore, the head box 110 includes a drive unit 117 that drives the first motor 112 and the second motor 115, a control unit 118 that controls the drive of the drive unit 117, and a switching power supply 119 that converts AC power from a commercial power source into DC power for the motors and the control unit.

The slats 120 are shielding materials that close the opening. As shown in FIG. 1, the slats 120 are supported by ladder cords 190 that hang down from the head box 110. The slats 120 and the ladder cords 190 form a first shielding material. The slats 120 rotate by tilting the ladder cords 190, opening and closing the opening. The slats 120 rise and fall by raising and lowering the lifting cords 180, changing the proportion of the opening that the slats 120 occupy.

As shown in FIG. 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 structure of the intermediate bar 130 will be described later.

The honeycomb screen 170 is a shielding material that closes the opening. As shown in FIG. 1, the upper end of the honeycomb screen 170 is suspended below the slats 120 via the 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 described below.

The honeycomb screen 170 is restricted from tilting forward and backward, particularly when folded, by a guide wire 173 hanging down from the head box 110. The lower end of the guide wire 173 passes through the slats 120, the intermediate bar 130, the honeycomb screen 170, and the bottom rail 171, and is connected to a fixed surface such as a floor surface via a guide wire fixture 174.

The intermediate bar 130, which is a characteristic feature of this embodiment, will be described with reference to Figures 2 and 3. Figure 2 is a diagram for explaining 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.

The intermediate bar 130 is configured with an upper bar material 140 to which the lower ends of the ladder cords 190 (the lower ends of the slats 120) and the lower ends of the lifting cords 180 that can be raised and lowered and hang down from the head box 110 are connected, a lower bar material 150 to which the upper end of the honeycomb screen 170 is connected, and a connecting means 160 that can switch between connecting and disconnecting the upper bar material 140 and the lower bar material 150. The upper bar material 140 and the lower bar material 150 are bar materials of the same shape.

(Upper bar material 140)
The upper bar material 140 is connected to the lower ends of the ladder cords 190 (the lower ends of the slats 120) and the lower ends of the lifting cords 180 that can be raised and lowered and hang down from the head box 110. As shown in Fig. 2, the upper bar material 140 is configured in a substantially H-shape by front and rear wall portions 141 and a plate-like portion 142 that is provided across the front and rear wall portions 141. Both the upper and lower ends of the wall portion 141 are bent in opposing directions to form rail-shaped upper openings 143 and lower openings 144 along the longitudinal direction.

As shown in FIG. 3, the slat 120 and the lower end of the ladder cord 190 are inserted into the upper opening 143, and the lower end of the ladder cord 190 passes through the plate-shaped portion 142 and is attached to the underside of the plate-shaped portion 142. The lower end of the lift cord 180 is also inserted into the upper opening 143, passes through the plate-shaped portion 142, and is attached to the underside of the plate-shaped portion 142 via a cord holder 182.

(Lower bar material 150)
The lower bar material 150 is connected to the upper end of the honeycomb screen 170. The lower bar material 150 has the same shape as the upper bar material 140, and as shown in Fig. 2, like the upper bar material 140, is configured to include front and rear wall portions 151, a plate-shaped portion 152, an upper opening 153, and a lower opening 154.

As shown in FIG. 3, the mounting member 174 attached to the upper end of the honeycomb screen 170 is inserted into the lower opening 154 and engaged with the front and rear wall portions 151. Thus, the upper end of the honeycomb screen 170 is attached to the lower bar material 150.

(Coupling Means 160)
The connecting means 160 is capable of switching between connecting and disconnecting the upper bar material 140 and the lower bar material 150. As shown in Figures 2 and 3, the connecting means 160 is interposed between the upper bar material 140 and the lower bar material 150, and has a claw portion 161 (first connecting portion) connectable to the upper bar material 140, a protrusion portion 162 (second connecting portion) connectable to the lower bar material 150, and an operation portion 163 for disconnecting the connection between the upper bar material 140 and the claw portion 161. As described later, the connecting means 160 is made of an elastic member that is elastically deformable so that the claw portion 161 can be attached and detached to the upper bar material 140.

As shown in Figs. 2 and 3, a pair of claws 161 are formed so as to protrude upward from both sides in the short direction. The claws 161 can be removably connected to both ends of the lower opening 144 of the upper bar material 140. The pair of claws 161 incline toward each other as they elastically deform so as to be able to engage and disengage with both ends of the lower opening 144. The side of the claws 161 is formed into a slope 161a that protrudes laterally as it goes downward. The slope 161a encourages elastic deformation so that the pair of claws 161 incline toward each other as the ends of the lower opening 144 come into contact with the slope 161a when the claws 161 are engaged with the lower opening 144.

As shown in Figures 2 and 3, a pair of protrusions 162 are formed so as to protrude on both sides in the short direction. The protrusions 162 can be slid and inserted into the upper opening 153 of the lower bar material 150. When the protrusions 162 are inserted into the upper opening 153, they abut against both ends of the upper opening 153, restricting upward movement. In addition, a lower protrusion 164 protrudes downward from the lower part of the protrusions 162 and abuts against the plate-shaped portion 152 of the lower bar material 150. The protrusions 162 are restricted from moving downward by the lower protrusions 164 abutting against the plate-shaped portion 152.

As shown in Figures 2 and 3, the operating parts 163 are formed as a pair, protruding in a roughly T-shape from a vertical midpoint of the claw part 161 on one side and the other side in the short direction. The pair of claw parts 161 can be pressed in a direction in which they approach each other. When the operating parts 163 are pressed, the claw parts 161 are elastically deformed so that they can be attached and detached freely to the upper bar material 140.

The above describes the configuration of the intermediate bar 130. The following describes the function of the intermediate bar 130 with reference to FIG. 4. FIG. 4 is a cross-sectional view for explaining the function of the intermediate bar 130, where (a) shows the upper bar material 140 and the lower bar material 150 in a joined state, (b) shows the state in which the operating unit 163 is operated, (c) shows the state in which the slat 120 is folded up, (d) shows the state in which the upper bar material 140 and the lower bar material 150 are in the middle of being 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 slat 120 is folded up.

When the upper bar material 140 and the lower bar material 150 are joined, as shown in FIG. 4(a), the claw portions 161 of the joining means 160 fit into both ends of the lower opening 144 of the upper bar material 140.

When releasing the connection between the upper bar material 140 and the lower bar material 150, the pair of operating parts 163 are pressed in the direction toward each other, as shown by the arrow a in FIG. 4(b). Then, the pair of claw parts 161 elastically deform so as to tilt in the direction toward each other, and the engagement with the upper bar material 140 is released. Thus, the connection between the upper bar material 140 and the lower bar material 150 is released. Then, when the slats 120 are folded, only the slats 120 and the upper bar material 140 rise, as shown by the arrow b in FIG. 4(c). The honeycomb screen 170, the lower bar material 150, and the connecting means 160 are held in a state in which the honeycomb screen 170 is folded.

When joining the upper bar material 140 and the lower bar material 150, the slat 120 and the upper bar material 140 are lowered to their lowest positions, as shown by the arrow c in FIG. 4(d). Then, when the upper bar material 140 is pressed downward with both ends of the lower opening 144 of the upper bar material 140 abutting against the pair of claws 161, both ends of the lower opening 144 of the upper bar material 140 press the pair of claws 161 along the slopes 161a. As a result, the pair of claws 161 elastically deform so as to incline toward each other, as shown by the arrow d in the figure.

When both ends of the lower opening 144 of the upper bar material 140 overcome the slope 161a, the pair of claws 161 elastically deform in a direction away from each other and fit into both ends of the lower opening 144, as shown in FIG. 4(e). Thus, the upper bar material 140 and the lower bar material 150 are joined. The above-mentioned operation of fitting the pair of claws 161 into both ends of the lower opening 144 can be performed one by one for the multiple joining means 160, but it can also be performed simultaneously for the multiple joining means 160 by simultaneously pressing multiple points in the longitudinal direction while the multiple joining means 160 are sandwiched between the upper bar material 140 and the lower bar material 163.

When the slats 120 are folded with the upper bar material 140 and the lower bar material 150 connected together, the connecting means 160 and the lower bar material 150 rise together with the upper bar material 140, as shown by the arrow e in FIG. 4(f). Thus, the honeycomb screen 170 unfolds.

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 Figs. 5 to 8. Fig. 5 is a diagram for explaining the operation of the electric blind 100. Fig. 6 is a front view of the electric blind 100 showing the intermediate bar 130 in its uppermost position. Fig. 7 is a front view of the electric blind 100 showing the intermediate bar 130 in its lowermost position. Fig. 8 is a front view of the electric blind 100 showing the upper bar material 140 together with the slats 120 in their uppermost positions.

When the intermediate bar 130 is raised to its uppermost position, the slats 120 are folded up and the honeycomb screen 170 is deployed, as shown in Figures 5(a) and 6. Therefore, the opening is closed by the honeycomb screen 170, which contributes to improving insulation at night in offices, etc.

The lifting drum 111 rotates as the first motor 112 drives the lifting cord 180 to rise and fall, and when the intermediate bar 130 is in the middle of rising and falling as shown in FIG. 5(b), the slats 120 and honeycomb screen 170 are each partially deployed. The degree to which the slats 120 and honeycomb screen 170 are deployed changes depending on the position of the intermediate bar 130. This makes it possible to change the degree to which the slats 120 and honeycomb screen 170 are exposed at the opening.

When the intermediate bar 130 is at its lowest position, as shown in Figures 5(c) and 7, the exposed ratio of the slats 120 is at its maximum. At this time, the honeycomb screen 170 is in a folded state. Therefore, in an office or the like, the angle of the slats 120 can be adjusted to control solar radiation.

When the operating portion 163 is pressed to release the engagement between the claw portion 161 and the upper bar material 140, the connection between the upper bar material 140 and the lower bar material 150 is released, as shown in FIG. 5(d). Therefore, the slat 120 can be raised and lowered independently.

When the upper bar material 140 and the lower bar material 150 are disconnected, the lifting drum 111 rotates by the drive of the first motor 112, the lifting cord 180 rises and falls, and the upper bar material 140 is raised and lowered, so that the slats 120 are folded up as shown in FIG. 5(e). Meanwhile, the honeycomb screen 170 maintains its folded state. Thus, the gap between the upper bar material 140 and the lower bar material 150 is opened.

When the upper bar material 140 is raised to the top end, it is in a fully open state as shown in Figures 5(f) and 8. This allows the opening to be opened to its maximum extent.

The operation of the electric blind 100 has been described above. Below, an example of how the electric blind 100 is used will be described with reference to FIG. 9. FIG. 9 is a diagram for explaining an example of how the electric blind 100 is used, where (a) shows the solar shading mode, (b) shows the daylight utilization mode 1, (c) shows the daylight utilization mode 2, (d) shows the insulation mode, and (e) shows the open mode.

Sun shading mode: As shown in Figure 9(a), the middle bar 130 is lowered to fold the honeycomb screen 170, and the slats 120 are rotated to provide sun shading.

Daylight mode 1: As shown in Figure 9(b), the intermediate bar 130 is lowered, the honeycomb screen 170 is folded up, and the slats 120 are angled close to horizontal to allow daylight in and a view.

Daylight use mode 2: As shown in Figure 9(c), the intermediate bar 130 is raised halfway up, the lower honeycomb screen 170 blocks sunlight and outside views, and daylight is taken in through the upper slats 120.

Insulation mode: As shown in Figure 9(d), when sunlight cannot be utilized, such as at night or on cloudy days in winter, the middle bar 130 is raised, the slats 120 are folded, and the honeycomb screen 170 is deployed, improving the insulation performance with the honeycomb screen 170.

Open mode: As shown in FIG. 9(e), when a feeling of openness is desired or maintenance such as cleaning of the glass surface is required, the upper bar material 140 and the lower bar material 150 are released from the connection by the connection means 160, and then the upper bar material 140 is raised. Then, with the honeycomb screen 170 remaining in a folded state, the slats 120 are folded and rise together with the upper bar material 140. This opens up the gap between the upper bar material 140 and the lower bar material 150. When the slats 120 are completely folded, the opening is opened to its maximum extent.

(Effects of this embodiment)
As described above, according to this embodiment, it is possible to change the exposure ratio and open the slats 120 and honeycomb screen 170 that are continuous vertically by raising and lowering them with an inexpensive configuration that does not require two drive systems.

In addition, the upper bar material 140 and the lower bar material 150 can be switched between being connected and disconnected using a simple connecting means 160.

In addition, the upper bar material 140 and the lower bar material 150 can be joined and unjoined simply by pressing the operating portion 163 of the joining means 160, improving the workability when switching between joining and unjoining the upper bar material 140 and the lower bar material 150.

In addition, the upper bar material 140 and the lower bar material 150 can be easily joined together by simply overlapping them and sandwiching the joining means 160 so that the claw portion 161 can fit into the upper opening 143 of the upper bar material 140. In particular, when multiple joining means 160 are provided along the longitudinal direction of the upper bar material 140 and the lower bar material 150, it is no longer necessary to operate the joining means 160 one by one, so the upper bar material 140 and the lower bar material 150 can be joined together more easily.

In addition, since the connecting means 160 can be connected to the lower bar material 150 in advance, it becomes easier to connect and disconnect it to the upper bar material 140.

In addition, by making the upper bar material 140 and the lower bar material 150 the same shape, parts can be standardized.

Although the preferred embodiment of the present invention has been described above with reference to the attached drawings, it goes without saying that the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or revised examples within the scope of the claims, and it is understood that these also naturally fall within the technical scope of the present invention.

For example, in the above embodiment, the connecting means 160 is removably connected to the upper bar material 140, but the present invention is not limited to this example. For example, the connecting means may be removably connected to the lower bar material, or may be removably connected to both the upper bar material and the lower bar material.

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

In addition, in the above embodiment, the connecting means 160 is elastically deformed so as to be detachable from 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 only one operating part, and the configuration for elastically deforming the connecting means can be designed as desired.

In addition, in the above embodiment, the connecting means 160 is configured as a separate member from the upper bar material 140 and the lower bar material 150, but the present invention is not limited to this example. Any design can be used as long as the connecting means connects the upper bar material and the lower bar material. For example, the connecting means may not be a separate member, but may be configured as one unit with either the upper bar material or the lower bar material.

In addition, in the above embodiment, the upper bar material 140 and the lower bar material 150 are bar materials of the same shape, but 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.

In addition, in the above embodiment, the intermediate bar 130 is provided on the electric blind 100, but it may be provided on a blind that is manually operated via an operating member.

The embodiments, application examples, and variations described above can be implemented in any suitable combination.

REFERENCE SIGNS LIST 100 Electric blind 110 Head box 111 Lifting drum 112 First motor 113 First rotating shaft 114 Rotating drum 115 Second motor 116 Second rotating shaft 117 Drive unit 118 Control unit 119 Switching power supply 120 Slat (first shielding material)
Reference Signs List 130: Middle bar 140: Upper bar member 141: Wall portion 142: Plate-shaped portion 143: Upper opening 144: Lower opening 150: Lower bar member 151: Wall portion 152: Plate-shaped portion 153: Upper opening 154: Lower opening 160: Joining means 161: Claw portion (first connecting portion)
161a Slope 162 Protrusion (second connecting portion)
163 Operating portion 164 Lower protrusion 170 Honeycomb screen (second shielding material)
171 Bottom rail (second shielding material)
172 Cushioning material 173 Guide wire 174 Mounting member 180 Lifting cord 182 Cord holder 190 Ladder cord (first shielding material)
BK Bracket

Claims (7)

A head box and
A first shielding material suspended from the head box in a liftable manner;
An intermediate bar connected to a lower end of the first shielding material;
a second shielding material suspended below the first shielding material via the intermediate bar;
A blind comprising:
The intermediate bar is
an upper bar material to which a lower end of the first shielding material and a lower end of a lift cord that is suspended from the head box and can be raised and lowered are connected;
A lower bar member to which an upper end of the second shielding member is connected;
A connecting means capable of switching between connecting and disconnecting the upper bar material and the lower bar material;
A blind comprising: The connecting means is interposed between the upper bar material and the lower bar material, and has a first connecting portion connectable to at least the upper bar material of the upper bar material and the lower bar material, and a second connecting portion connectable to at least the lower bar material of the upper bar material and the lower bar material,
The blind according to claim 1 , wherein 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. The blind according to claim 2, characterized in that the connecting means is an elastic member that is elastically deformable so that at least one of the first connecting part and the second connecting part can be attached and detached to at least one of the upper bar material and the lower bar material. the coupling means has a pair of operating portions protruding toward one side and the other side in a short-side direction of the intermediate bar so as to be pressable from the one side and the other side,
The blind as described in claim 3, characterized in that when the operating portion is pressed, at least one of the first connecting portion and the second connecting portion elastically deforms so as to be freely attached and detached to at least one of the upper bar material and the lower bar material. The upper bar member and the lower bar member have openings on the surfaces facing the connecting means,
The blind according to claim 3 , wherein at least one of the first connecting portion and the second connecting portion is a pair of claw portions that tilt in association with the elastic deformation so as to be able to engage with and disengage from the opening. The opening is a rail-shaped opening formed along the longitudinal direction of the intermediate bar,
The first connecting portion is the pair of claw portions that can be detachably connected to the opening,
The blind according to claim 5 , wherein the second connecting portion is a protruding portion that protrudes to one side and the other side in the short side direction and is slidably insertable into the opening. The blind according to any one of claims 1 to 6, wherein the upper bar material and the lower bar material are bar materials of the same shape.