A roller clutch for a window shade includes a housing, a bead chain wheel, and a roller adapter. Transmission of movement from the bead chain to the roller adapter depends upon the force applied by the bead chain to the roller clutch.

The present invention relates to the sunshade driving device comprising that: a returning function of a manual driving module (410) is actuated by a ball chain or a rotating string; a rotating shaft (491) is attachable/detachable to the power drive unit or the rotating shaft stopping unit separated from a manual driving module; at least one pick-up member (452, 453) to directly drive the sunshade rotating shaft or driving the rotating shaft (491) by the manual drive module (410); a wheel driving member (417) having a manual pulley (417a) or a manual driving wheel (412b) being fitted the ball chain or rotating string; wherein the wheel drive member (417) will be engaged to the manual rotating wheel (412b) and the manual pulley (417a) for rotating together in one direction, and the wheel driving member (417) will disengaged the manual rotating wheel (412b) and the manual pulley (417a) for independently rotating each other in opposite direction activated by a bi-directional driving clutch (417b).

The present invention relates to the sunshade driving device comprising that: a returning function of a manual driving module (410) is actuated by a ball chain or a rotating string; a rotating shaft (491) is attachable/detachable to the power drive unit or the rotating shaft stopping unit separated from a manual driving module; at least one pick-up member (452, 453) to directly drive the sunshade rotating shaft or driving the rotating shaft (491) by the manual drive module (410); a wheel driving member (417) having a manual pulley (417a) or a manual driving wheel (412b) being fitted the ball chain or rotating string; wherein the wheel drive member (417) will be engaged to the manual rotating wheel (412b) and the manual pulley (417a) for rotating together in one direction, and the wheel driving member (417) will disengaged the manual rotating wheel (412b) and the manual pulley (417a) for independently rotating each other in opposite direction activated by a bi-directional driving clutch (417b).

A clutch cover for a roller blind clutch. The clutch cover comprises a clutch barrel portion mounted upon and extending outwardly from a first side of a backing plate, a cover ring and one or more indexing locators to fix the position of the cover ring relative to the backing plate when the cover ring is releasably secured about the backing plate. The cover ring includes a chain guide and is releasably securable about the backing plate such that the cover ring encompasses the backing plate. The indexing locators prevent relative rotational movement between the cover ring and the backing plate when the cover ring is releasably secured about the backing plate. The indexing locators permit the chain guide to be positioned at a plurality of angles relative to the backing plate.

The quick release device may comprise a shade tube, a gear wheel engaging with the shade tube, a pawl removably engaging with the gear wheel and a solenoid configured to activate the pawl. The activation of the pawl disengages the pawl from the pawl wheel and allows the shade tube to rotate. The quick release device may also include a shade tube, a rotating brake plate engaging with the shade tube, a spring configured to apply pressure to the rotating brake plate and a magnet configured to apply magnetism to the spring. In response to the magnet applying magnetism to the spring, the spring contracts and releases pressure on the rotating brake plate and allows the shade tube to rotate.

A rolling shutter driving device includes a motor, a locking assembly and a gearbox. The motor includes a stator and a rotor. The rotor includes a rotary shaft connected to the gearbox. The rotary shaft drives through the gearbox a rolling shutter to extend or retract. The locking assembly includes a brake pad slidingly fitted on the rotary shaft and a rotary member fixedly mounted to the rotary shaft. The brake pad is circumferentially fixed relative to the stator. The brake pad is slidable relative to the rotary shaft so as to be selectively engaged with the rotary member to lock the rotary shaft and hence hold the load in position, or disengaged from the rotary member to unlock the rotary shaft.

A control module of a window shade includes a drive axle affixed with a sleeve, an arrester assembled around the sleeve, a cord drum connected with an operating cord, a clutch operable to couple and decouple the cord drum with respect to the drive axle, and a release unit including a stick that is operatively connected with the arrester. The arrester blocks rotation of the drive axle in a locking state, and has an unlocking state allowing rotation of the drive axle. The operating cord is pulled to drive the cord drum in rotation and turn the clutch to a coupling state, such that the rotation of the cord drum is transmitted through the clutch to drive the drive axle in rotation for raising the shading structure. Moreover, the stick is operable to switch the arrester from to the unlocking state for lowering the shading structure by gravity action.

A blind lifting control module includes a transmitting wheel, an anti-backward unit and a driving unit disposed to a supporting unit. The transmitting wheel for connecting a blind reeled horizontal axle has ratchet portions respectively meshable with corresponding ratchet portions of an anti-backward wheel and a driving reel. A pull cord is reeled on the driving reel and has a free end passing through a thrust member and a hindering member, and is pulled to release the anti-backward wheel to permit lowering of a blind. The thrust member is turned by pulling of the pull cord to thrust the driving reel to mesh with the transmitting wheel for lifting the blind.

The present invention discloses a clutch, a motor device and a curtain control device. The clutch comprises: a drive force receiving part; a clutch controlling part which is disposed at a side of the drive force receiving part which comprises a first control piece, connected to the drive force receiving part, and a first direction driving position and a first direction disengaging position connected to the first direction driving position are disposed at a side of the first control piece away from the drive force receiving part; a clutch piece, located at the first direction driving position or the first direction disengaging position; and a second control piece, sleeved around the first control piece and the clutch piece; a drive force outputting part. The embodiments of the present disclosure effectively solve the problems resulting from the use of magnetic separation in realizing engaging and disengaging functions of an existing clutch.

A top-down bottom-up window covering has a headrail, a middle rail, a bottom rail, a lifting control structure installed at the headrail, and a covering structure installed between the middle rail and the bottom rail. The lifting control structure controls a first rotating shaft and a second rotating shaft to respectively receive or release a first cord and a second cord. The first cord drives the middle rail to move, and the second cord drives the bottom rail to move. A one-way clutch and a pre-stress unit are further provided at the headrail. When the bottom rail pushes the middle rail to move upward, the one-way clutch breaks a link between the first rotating shaft and the lifting control structure. Consequently, a driving force generated by the pre-stress unit immediately drives the first rotating shaft to receive the first cord to keep the first cord taut.