Roll screen device

Abstract

To effectively utilize generated electricity in a roll screen device equipped with solar cells.SOLUTION: A roll screen device 10 includes a sheet-like screen portion 12, solar cells 20 provided on the screen portion 12, a bottom rail 18 provided at a lower end of the screen portion 12, and a power transmission coil 28 provided on the bottom rail 18 for outputting power generated by the solar cells 20 to an electronic device having a power receiving coil.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a roll screen device, and particularly to a roll screen device provided with a solar cell.

Background Art

[0002] Conventionally, a roll screen device in which solar cells are provided in a screen portion is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the roll screen device having a conventional power generation function as disclosed in Patent Document 1, how to use the generated power is not disclosed.

[0005] The present disclosure has been made in view of such problems, and an object thereof is to provide a technique capable of effectively using generated power in a solar radiation shielding device provided with a solar cell.

Means for Solving the Problems

[0006] In order to solve the above problems, a roll screen device according to an aspect of the present invention includes a screen portion configured in a sheet shape, a solar cell provided in the screen portion, a bottom rail provided at a lower end of the screen portion, and a power transmission coil provided on the bottom rail for outputting the power generated by the solar cell to an electronic device having a power receiving coil.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0008] Hereinafter, the present invention will be described with reference to the drawings based on preferred embodiments. The following configurations are for the purpose of exemplification for understanding the present disclosure, and the scope of the present disclosure is determined only by the appended claims. The same or equivalent components and members shown in each drawing are denoted by the same reference numerals, and redundant explanations are omitted as appropriate. In addition, the dimensions of the members in each drawing are appropriately enlarged or reduced for easy understanding. Also, a part of the members that are not important in explaining the embodiments in each drawing is omitted from the display. Further, in the present disclosure, when terms indicating directions such as "upper", "lower", "front", "rear", "left", "right", "inner", and "outer" are used, they mean the directions in the posture when the roll screen device is attached to a building.

[0009] The roll screen device 10 shown in FIG. 1 is attached to and used in an opening of a building. In the example shown in FIG. 1, the opening of the building is formed by frame members such as vertical uprights (vertical frames) 101 and 102 extending in the vertical direction and horizontal bars (horizontal frames) 103 and 104 extending in the horizontal direction.

[0010] On the outdoor side of the opening of the building, a glass panel (not shown) is arranged. The glass panel may be attached to the uprights 101 and 102 and the horizontal bars 103 and 104 by predetermined supporting means such as a structural sealant. The roll screen device 10 is arranged on the indoor side of the opening of the building.

[0011] The roll screen device 10 includes a screen unit 12 and a holding unit 14 that suspends and holds the screen unit 12.

[0012] The holding unit 14 includes a winding drum 16 for winding up the screen unit 12 and an upper frame 15 provided above the winding drum 16. The upper frame 15 is a member having a U-shaped cross section perpendicular to the longitudinal direction, and is arranged such that the longitudinal direction is parallel to the longitudinal direction of the winding drum 16. The upper frame 15 is fixed to the upper blind 103 via a bracket 13. The upper frame 15 may be a hollow square tube. Support members 17 are provided at both the left and right ends of the upper frame 15. The winding drum 16 is supported by the upper frame 15 via the support members 17. A tubular motor (not shown) for rotating the winding drum 16 is arranged inside the winding drum 16. By driving the tubular motor, the screen unit 12 can be raised and lowered.

[0013] Inside the upper frame 15, a motor control board (not shown) for controlling the tubular motor, an AC / DC conversion board (not shown) for converting the AC voltage input from a power outlet via a power line into a DC voltage, etc. are accommodated.

[0014] The screen unit 12 is configured as a flexible rectangular sheet-like body. The upper end portion in the longitudinal direction of this screen unit 12 is connected to the winding drum 16, and a bottom rail 18 is provided at the lower end portion. The bottom rail 18 applies a force in the direction of pulling down the screen unit 12 and acts to apply tension to the screen unit 12 to enhance flatness.

[0015] The roll screen device 10 may include a pair of guide rails (not shown) for guiding the raising and lowering of the screen unit 12 at both left and right (horizontal) ends of the screen unit 12. The guide rail 22 may be configured to sandwich the left and right ends of the screen unit 12. When the screen unit 12 is raised and lowered, the end of the screen unit 12 slides within the guide rail 22. The gap between the guide rail 22 and the screen unit 12 may be blocked with mohair or the like. By providing the guide rail 22, heat transfer from the lateral side of the screen unit 12 can be prevented, so that the heat insulation performance can be improved. Also, light leakage from the lateral side of the screen unit 12 can be prevented, so that the light shielding performance can be improved. Furthermore, an effect of suppressing wrinkles in the screen unit 12 can also be expected.

[0016] The screen unit 12 includes a fabric layer and a plurality of solar cell cells 20 provided on the fabric layer. The fabric layer may be formed of fibers and plastics (synthetic resins) such as polypropylene, polyethylene, and polyester. In another embodiment, the screen unit 12 may not include a fabric layer and may be a skeleton type including, for example, an ETFE film.

[0017] In the embodiment shown in FIG. 1, a plurality of square solar cell cells 20 in plan view are arranged in a matrix, but the size, shape, and arrangement method of the solar cell cells 20 are not particularly limited, and free sizes, shapes, and arrangements are possible. For example, a plurality of rectangular solar cell cells in plan view may be arranged side by side in the vertical direction of the screen unit 12. Generally, matrix arrangement is frequently used in crystalline silicon solar cell cells. In another embodiment, perovskite or the like may be in a state of being coated on the entire light-receiving surface or printed. The solar cell cell 20 is configured to utilize the photovoltaic effect and convert light energy into electric power.

[0018] Each solar cell 20 has a positive and a negative extraction electrode formed thereon. The positive extraction electrodes formed on each solar cell 20 are connected to each other by a positive electrode ribbon wire (not shown). Similarly, the negative extraction electrodes formed on each solar cell 20 are connected to each other by a negative electrode ribbon wire (not shown). The plurality of solar cells 20 are thus connected to each other by the positive electrode ribbon wire and the negative electrode ribbon wire. The wiring form can be arranged regardless of series or parallel, and here, it is not limited thereto.

[0019] At the lower end of the screen portion 12, a positive electrode lead wire 23 and a negative electrode lead wire 24 are respectively connected to the positive electrode ribbon wire and the negative electrode ribbon wire. The positive electrode lead wire 23 and the negative electrode lead wire 24 are drawn out to the outside from the lower end of the screen portion 12. The lower end of the screen portion 12 is recessed into the bottom rail 18. The screen portion 12 has the bottom frame 18 suspended by a holding member provided at the lower end. As shown in FIG. 3, inside the bottom frame 18, the positive electrode lead wire 23 and the negative electrode lead wire 24 are connected to the control board 26.

[0020] As shown in FIGS. 2 and 3, the bottom rail 18 may be a hollow rod-shaped body. The outer cross-section perpendicular to the longitudinal direction of the bottom rail 18 may be rectangular or circular. The hollow rod-shaped body may be constituted by combining members divided into two or more by, for example, fitting.

[0021] A control board 26 for controlling the power generated by the solar cells 20 may be accommodated in the bottom rail 18.

[0022] The control board 26 may include an MPPT (Maximum Power Point Tracking) control board, a charge and discharge control board, and a power supply board. These control boards control the power input via the positive electrode lead wire 23 and the negative electrode lead wire 24.

[0023] The MPPT control board is a control board for following the maximum operating point during power generation in real time according to changes in weather conditions. The charge / discharge control board is a control board for controlling the charging and discharging of the power generated by the solar cell 20. The power supply board is a board for controlling the supply of power to the outside via the power transmission coil.

[0024] In the roll screen device 10 according to the present embodiment, a power transmission coil 28 for outputting the power generated by the solar cell 20 to the electronic device 40 having a power receiving coil is provided on the bottom rail 18. The power transmission coil 28 is arranged to face the power receiving coil of the electronic device 40, so that power can be supplied in a non-contact manner between the power receiving coil. The non-contact power transmission method may be an electromagnetic induction method, a magnetic field resonance method, or a microwave wireless method.

[0025] In the present embodiment, it is assumed that the electronic device 40 is arranged along the indoor side surface of the bottom rail 18. Therefore, the power transmission coil 28 is arranged to face the indoor side surface of the bottom rail 18. The orientation of the power transmission coil 28 may be appropriately set according to the arrangement position of the electronic device 40. For example, when it is assumed that the electronic device 40 is arranged below the bottom rail 18, the power transmission coil 28 may be arranged to face the bottom surface of the bottom rail 18. The surface of the bottom rail 18 facing the power transmission coil 28 is configured to be transmissive to electromagnetic waves so that power can be transmitted to the power receiving coil.

[0026] On the bottom rail 18, a device holding part 42 for holding the electronic device 40 may be provided so that the power transmission coil 28 and the power receiving coil of the electronic device 40 face each other. By providing such a device holding part 42, the power transmission coil 28 and the power receiving coil of the electronic device 40 can be easily opposed, so that the charging of the electronic device 40 can be performed smoothly. Further, even when the screen part 12 moves up and down, the charging of the electronic device 40 can be continued. The device holding part 42 may be a pocket-shaped one as shown in FIG. 3, or may use a hook-and-loop fastener. For example, one side of the hook-and-loop fastener may be attached to the bottom rail 18 side, the other side of the hook-and-loop fastener may be attached to the electronic device 40 side, and the two may be joined to hold the electronic device 40. Alternatively, an attachment with a hook-and-loop fastener for the electronic device may be used.

[0027] As described above, the configuration of the roll screen device 10 according to the embodiment has been described. According to this roll screen device 10, by providing the power transmission coil on the bottom rail 18, the wiring length is shortened, and the power generated by the solar cell 20 can be output to the outside with low loss, so that the generated power can be effectively utilized.

[0028] Further, according to the roll screen device 10, charging can be performed only by arranging the electronic device 40 in the device holding part 42. Since an operation such as inserting a charging cable into a connector is not required, charging can be easily performed. Further, since it is not necessary to handle the charging cable and the USB port and the charging cable are not exposed, the appearance around the opening can be made neat. Furthermore, since the roll screen device 10 performs non-contact power transmission, product failures such as deterioration and poor contact of the connector contact part due to repeated insertion and removal of the charging connector, and short circuit of the connector contact part due to dew condensation can be avoided.

[0029] FIG. 4 shows a roll screen device 50 according to another embodiment. In the roll screen device 50 shown in FIG. 4, a plurality of power transmission coils 28 and device holders 42 are provided along the horizontal direction (left - right direction) of the bottom rail 18. The plurality of power transmission coils 28 are electrically connected in parallel and can charge a plurality of electronic devices simultaneously.

[0030] FIG. 5 shows a roll screen device 60 according to yet another embodiment. In the roll screen device 60 shown in FIG. 5, the power transmission coil 28 is provided in a part (for example, the lower part) of the screen part 12. The power transmission coil 28 and the control board 26 are connected by a cable (not shown). As shown in FIG. 5, a device holder 42 for holding the electronic device 40 may be provided such that the power transmission coil 28 and the power receiving coil of the electronic device 40 face each other. The device holder 42 may be in the form of a pocket or may use a surface fastener, similar to the above - described embodiment.

[0031] The present invention has been described based on embodiments. These embodiments are illustrative, and it is understood by those skilled in the art that various modifications and changes are possible within the scope of the claims of the present invention, and such modifications and changes are also within the scope of the claims of the present invention. Therefore, the descriptions and drawings in this specification should be treated as illustrative rather than restrictive.

Explanation of Reference Numerals

[0032] 10, 50, 60 roll screen devices, 12 screen part, 14 holder, 15 upper frame, 16 take - up drum, 18 bottom rail, 20 solar cell, 22 guide rail, 26 control board, 28 power transmission coil, 40 electronic device, 42 device holder.

Claims

1. A screen part configured in a sheet shape, a solar cell provided on the screen part, and a power transmission coil for outputting the power generated by the solar cell to an electronic device having a power receiving coil. A roll screen device comprising the above.

2. Further comprising a bottom rail provided at the lower end of the screen part, The power transmission coil is provided on the bottom rail. The roll screen device according to Claim 1.

3. The power transmission coil is arranged in a plurality along the horizontal direction of the bottom rail. The roll screen device according to Claim 2.

4. The power transmission coil is provided on the screen part. The roll screen device according to Claim 1.

5. The roll screen device according to any one of Claims 1 to 4, further comprising a device holding part for holding the electronic device such that the power transmission coil and the power receiving coil face each other.

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