A window covering can be configured to facilitate height adjustment of window covering material. In some embodiments, a handle or clips may be utilized to help maintain the position of the window covering material so that the use of an operator cord and/or exposed lift cords can be avoided or minimized.

A spring-assisted cordless roller shade without clutch system includes a tubular body defining an internal space. A shade is wound on the tubular body. The internal space has a first section and a second section. In each of the first and second sections are mounted a connector, a central shaft assembled with the connector, a fixing member connected with the central shaft and a subsidiary shaft disposed on the fixing member. An elastic member is disposed between the connector and the central shaft to provide a frictional force. A rotational member and a torsion spring are mounted on the subsidiary shaft of the first section and rotatable along with the tubular body. A constant force belt spring module is assembled with the subsidiary shaft of the second section. When the operational force applied to the shade disappears, the shade is immediately located.

A spring-assisted cordless roller shade without clutch system includes a tubular body defining an internal space. A shade is wound on the tubular body. The internal space has a first section and a second section. In each of the first and second sections are mounted a connector, a central shaft assembled with the connector, a fixing member connected with the central shaft and a subsidiary shaft disposed on the fixing member. An elastic member is disposed between the connector and the central shaft to provide a frictional force. A rotational member and a torsion spring are mounted on the subsidiary shaft of the first section and rotatable along with the tubular body. A constant force belt spring module is assembled with the subsidiary shaft of the second section. When the operational force applied to the shade disappears, the shade is immediately located.

A hand-held curtain is provided. The curtain includes a left bracket, a right bracket corresponding to the left bracket, and a pylon connected to the left bracket and the right bracket. A scroll is arranged on the left bracket and the right bracket; a roller blind is arranged on the scroll; and coiling apparatuses used for coiling the scroll are respectively arranged on the left bracket and the right bracket.

The present invention provides a constant force multiple spring curtain winding system, including a mounting bracket fixedly connected to a wall, and a revolving drum connected to a curtain, wherein one end of the mounting bracket is connected to a rotating rod through a speed change mechanism, a constant force spring mechanism fixedly connected to the revolving drum is arranged on the rotating rod, and the rotating rod is fixedly connected to a constant force elastic piece in the constant force spring mechanism. According to the present invention, a speed of the revolving drum is adjusted by the speed change mechanism, and the rotating rod rotates at a low speed by the speed change mechanism when the revolving drum rotates at a high speed, thus ensuring that the revolving drum rotates for enough turns to meet a height of the curtain, maximizing a width of the curtain and reducing a counterweight of a lower rail of the curtain; and the requirement on the size of the curtain is met by increasing or decreasing the number of the constant force spring mechanisms, and the curtain is capable of staying at any positions. The constant force multiple spring curtain winding system is novel in structure, simple to operate, wide in application and easy to popularize.

The present invention provides a constant force multiple spring curtain winding system, including a mounting bracket fixedly connected to a wall, and a revolving drum connected to a curtain, wherein one end of the mounting bracket is connected to a rotating rod through a speed change mechanism, a constant force spring mechanism fixedly connected to the revolving drum is arranged on the rotating rod, and the rotating rod is fixedly connected to a constant force elastic piece in the constant force spring mechanism. According to the present invention, a speed of the revolving drum is adjusted by the speed change mechanism, and the rotating rod rotates at a low speed by the speed change mechanism when the revolving drum rotates at a high speed, thus ensuring that the revolving drum rotates for enough turns to meet a height of the curtain, maximizing a width of the curtain and reducing a counterweight of a lower rail of the curtain; and the requirement on the size of the curtain is met by increasing or decreasing the number of the constant force spring mechanisms, and the curtain is capable of staying at any positions. The constant force multiple spring curtain winding system is novel in structure, simple to operate, wide in application and easy to popularize.

An opening/closing direction restriction mechanism for a manual shutter device and an opening/closing direction restriction mechanism for a suspended sliding door device This opening/closing direction restriction mechanism is provided with: a flange fixedly mounted on a fixed shaft; a bracket which is loosely fitted to the fixed shaft and can be integrally rotated with a winding member; and a two-way clutch which can be switched between a reverse rotation inhibited state in which the revolution of a planetary external gear along a winding direction of the winding member is allowed and the revolution of the planetary external gear along an unwinding direction is inhibited, and a forward rotation inhibited state in which the revolution of the planetary external gear along the winding direction of the winding member is inhibited and the revolution of the planetary external gear along the unwinding direction is allowed.

A window curtain includes a rotary tube located in the top rail, and a curtain is connected between the top rail and the bottom rail. A scrolling device is located in the tube and includes a torsion spring mounted to a fixed shaft. A sleeve is connected to the fixed shaft. An adjustment unit is connected to the fixed shaft. The torsion spring is located between the sleeve and the adjustment unit. The adjustment unit includes a housing, a tubular part and a resilient member. The first end of the torsion spring is fixed to the tubular part. The torsion spring is compressed or released by rotating the adjustment unit. The tubular part includes ratchets which are engaged with a pawl in the housing to maintain the tubular part and the torsion spring from rotating reversely.

A window curtain includes a rotary tube located in the top rail, and a curtain is connected between the top rail and the bottom rail. A scrolling device is located in the tube and includes a torsion spring mounted to a fixed shaft. A sleeve is connected to the fixed shaft. An adjustment unit is connected to the fixed shaft. The torsion spring is located between the sleeve and the adjustment unit. The adjustment unit includes a housing, a tubular part and a resilient member. The first end of the torsion spring is fixed to the tubular part. The torsion spring is compressed or released by rotating the adjustment unit. The tubular part includes ratchets which are engaged with a pawl in the housing to maintain the tubular part and the torsion spring from rotating reversely.

Disclosed is a safety gate that includes a first fixing mechanism, a second fixing mechanism, a connection mechanism, a return spring, a screen rolling tube, and a rollup screen operative to be wound on the screen rolling tube. One end of the screen rolling tube is provided with a first mounting mechanism, and the other end is provided with a second mounting mechanism. One end of the return spring passes through the screen rolling tube to be fixedly connected to one end of the rollup screen, and the other end of the return spring is fixedly connected to the first mounting mechanism. A locking mechanism is provided in the second mounting mechanism for locking or unlocking the screen rolling tube, and is fixedly connected to the screen rolling tube. The other end of the rollup screen is provided with a handle mechanism.