A window shade includes a top box, a bottom bar and a shade connected between the top box and the bottom bar. Multiple wire units extend through holes of the shade. Each wire unit includes two connection wires and multiple cross wires which are spaced and transversely connected between the connection wires. Each wire unit has an operation wire for controlling the shade, the operation wire alternatively extends between the cross wires along the longitudinal direction of the shade. The holes in the shade each include two passages formed at two inner ends thereof. The connection wires extend through the two passages. At least one tooth extends from each of two insides of each of the holes and located between the two passages. When the wire unit is pulled outward, the cross wires are restricted by the teeth so that the operation wire is restricted from being pull out.

A spring drive system for a cordless window shade includes multiple rotary drums respectively connected with suspension cords, and one or more springs respectively connected with the rotary drums. The rotary drums are operatively connected with each other, so that they can synchronously rotate to wind and unwind the suspension cords. Moreover, each of the rotary drums is connected with an end of one spring. The spring torque can act to sustain a bottom part of the window shade at any desired height, and drive rotation of the rotary drums to wind the suspension cords when the bottom rail is raised upward.

A spring drive system for a cordless window shade includes multiple rotary drums respectively connected with suspension cords, and one or more springs respectively connected with the rotary drums. The rotary drums are operatively connected with each other, so that they can synchronously rotate to wind and unwind the suspension cords. Moreover, each of the rotary drums is connected with an end of one spring. The spring torque can act to sustain a bottom part of the window shade at any desired height, and drive rotation of the rotary drums to wind the suspension cords when the bottom rail is raised upward.

A magnetic blind device includes boards. The boards are stacked in a vertically oriented arrangement. The boards have openings through the boards. A top board is higher than a bottom board. An elevation line passes through the openings of the boards from the top board to the bottom board. The elevation line is for raising the blinds. Magnetic strips can be mounted to a left side and a right side of each board of the boards. A metal strip can be positioned to contact the plurality of magnetic strips when the plurality of magnetic strips transfers from a dormant position to an activated position. The magnetic strips attract to each other and to the metal strip. Optionally, an electromagnet can selectively magnetize the metal strip when an electromagnet switch is activated. The magnet strip is preferably rectangular.

A magnetic blind device includes boards. The boards are stacked in a vertically oriented arrangement. The boards have openings through the boards. A top board is higher than a bottom board. An elevation line passes through the openings of the boards from the top board to the bottom board. The elevation line is for raising the blinds. Magnetic strips can be mounted to a left side and a right side of each board of the boards. A metal strip can be positioned to contact the plurality of magnetic strips when the plurality of magnetic strips transfers from a dormant position to an activated position. The magnetic strips attract to each other and to the metal strip. Optionally, an electromagnet can selectively magnetize the metal strip when an electromagnet switch is activated. The magnet strip is preferably rectangular.

The present invention relates to a window system provided with a blind for solar photovoltaic power generation. In the window system of the present invention, a blind provided with solar cells is installed in a space between indoor side windows and outdoor side windows slidably coupled to the inner surfaces of a window frame. With such a configuration, the window system is easy to install and maintain. The window system of the present invention includes a window frame 10; indoor side windows 21 and outdoor side windows 23 slidably coupled to the inner surfaces of the window frame 10; and a blind 100 for solar photovoltaic power generation installed in a space S between the indoor side windows 21 and the outdoor side windows 23.

The present invention relates to a window system provided with a blind for solar photovoltaic power generation. In the window system of the present invention, a blind provided with solar cells is installed in a space between indoor side windows and outdoor side windows slidably coupled to the inner surfaces of a window frame. With such a configuration, the window system is easy to install and maintain. The window system of the present invention includes a window frame 10; indoor side windows 21 and outdoor side windows 23 slidably coupled to the inner surfaces of the window frame 10; and a blind 100 for solar photovoltaic power generation installed in a space S between the indoor side windows 21 and the outdoor side windows 23.

A blind co-used sheet includes a vertical first blind sheet, a vertical second blind sheet, transverse double-layered blind sheets sown between the first and second blind sheets and fixing plate assemblies for securely holding front ends of the transverse double-layered blind sheets. The transverse double-layered blind sheets can be turned from a transverse state into a vertical state and used as a vertical blind. Alternatively, the transverse double-layered blind sheets can be 90-degree turned back from the vertical state into the transverse state and used as a Shangri-la blind. Two sides of the transverse double-layered blind sheet have upward and downward extending sunshade sections, which can overlap each other. A sunshade sheet is disposed in the transverse double-layered blind sheet to locate the blind sheets.

A blind co-used sheet includes a vertical first blind sheet, a vertical second blind sheet, transverse double-layered blind sheets sown between the first and second blind sheets and fixing plate assemblies for securely holding front ends of the transverse double-layered blind sheets. The transverse double-layered blind sheets can be turned from a transverse state into a vertical state and used as a vertical blind. Alternatively, the transverse double-layered blind sheets can be 90-degree turned back from the vertical state into the transverse state and used as a Shangri-la blind. Two sides of the transverse double-layered blind sheet have upward and downward extending sunshade sections, which can overlap each other. A sunshade sheet is disposed in the transverse double-layered blind sheet to locate the blind sheets.

A vertical curtain blind includes a panel assembly having a plurality of individual panels coupled together in a side-by-side arrangement. Each panel extends in a vertical direction between a top end and a bottom end. Additionally, each panel includes first and second pockets positioned along first and second sides of the panel, respectively, adjacent to the top end of the panel. The blind associated includes a plurality of clip assemblies, with each clip assembly being configured to couple a respective pair of adjacent panels of the plurality of panels together. Each clip assembly includes a first connector clip positioned within the first pocket of a first panel of the respective pair of adjacent panels and a second connector clip positioned within the second pocket of an adjacent second panel of the respective pair of adjacent panels, with the first connector clip configured to be coupled to the second connector clip.