Disclosed is an end cap or connector for a wheel system, the end cap or connector has a cylindrical portion for engagement with one of an extension or a quick release system, the cylindrical portion further including a catch for attachment to the extension; and a cap, extending from said cylindrical portion, said cap having a connector for attaching to a wheel carriage or another extension. Also disclosed is a method which includes the end cap and inserting the end cap into an extension such as a hollow tube or rod; and releasably attaching the end cap to a wheel system.

Disclosed is an end cap or connector for a wheel system, the end cap or connector has a cylindrical portion for engagement with one of an extension or a quick release system, the cylindrical portion further including a catch for attachment to the extension; and a cap, extending from said cylindrical portion, said cap having a connector for attaching to a wheel carriage or another extension. Also disclosed is a method which includes the end cap and inserting the end cap into an extension such as a hollow tube or rod; and releasably attaching the end cap to a wheel system.

The invention relates to a curtain security structure driven by a bead chain, comprising an upper assembler, a lower assembler, and flexible support parts to be assembled correspondingly. A lower rotary wheel of the lower assembler is engaged with an upper rotary wheel of the upper assembler. The two flexible support parts are inserted from the bottom of the lower assembler to assemble the upper and the lower assemblers. An upper bead chain and a lower bead chain are entwined and disposed in upper and lower bead pockets respectively via pockets disposed on struts of the flexible support parts. When children improperly use the curtain security structure and thus are entwined by the lower bead chain and struggle, the lower bead chain, the lower assembler and the flexible support part can simultaneously detach from the upper assembler to prevent the children from being damaged to achieve the safe protection effect.

In a method for installing sunshade in light opening of building element, the light opening comprises first and second edge surfaces. A glazing unit extends from the first edge surface to the second edge surface. The first and/or second edge surface is provided with at least two fastening holes. A fastener is installed in the fastening holes. Installation rail is attached to the fasteners which comprise a tip and a head part. Before the building element is mounted in the building, fastening holes are provided and the first ends of the fastening holes opening in the first and/or the second edge surface are closed. The first ends of fastening holes are opened in connection with installing fasteners. Fasteners are driven in fastening holes by inserting or screwing the tip part into the fastening hole, and the installation rails are attached to the head part remaining outside the fastening hole.

In a method for installing sunshade in light opening of building element, the light opening comprises first and second edge surfaces. A glazing unit extends from the first edge surface to the second edge surface. The first and/or second edge surface is provided with at least two fastening holes. A fastener is installed in the fastening holes. Installation rail is attached to the fasteners which comprise a tip and a head part. Before the building element is mounted in the building, fastening holes are provided and the first ends of the fastening holes opening in the first and/or the second edge surface are closed. The first ends of fastening holes are opened in connection with installing fasteners. Fasteners are driven in fastening holes by inserting or screwing the tip part into the fastening hole, and the installation rails are attached to the head part remaining outside the fastening hole.

A bead chain or cord retainer which includes a frame, a moving part, and an elastic member is provided. The moving part is mounted in and moved with respect to the frame and the elastic member is disposed between the frame and the moving part. A bead chain or a cord is inserted through a clipped and limited space formed by the frame and the moving part. The bead chain or a cord is generally held by the frame and the moving part and thus positioned. The moving part is pushed upward for mounting the retainer. Then a fastener is inserted through the frame and the moving part to be threaded into a wall. Relative positions of the frame and the moving part are fixed and the clipped and limited space is expanded. Thereby the bead chain or the cord is drawn smoothly to open or close curtains.

A bead chain or cord retainer which includes a frame, a moving part, and an elastic member is provided. The moving part is mounted in and moved with respect to the frame and the elastic member is disposed between the frame and the moving part. A bead chain or a cord is inserted through a clipped and limited space formed by the frame and the moving part. The bead chain or a cord is generally held by the frame and the moving part and thus positioned. The moving part is pushed upward for mounting the retainer. Then a fastener is inserted through the frame and the moving part to be threaded into a wall. Relative positions of the frame and the moving part are fixed and the clipped and limited space is expanded. Thereby the bead chain or the cord is drawn smoothly to open or close curtains.