A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

A door operator comprises a rotary shaft, a chain disk for rotating the rotary shaft, and a locking mechanism for locking the rotary shaft. The locking mechanism comprises a bidirectional rotary block, a plurality of push pins and anti-rotation posts. When the chain disk rotates, the push pins urge the bidirectional rotary block to rotate the rotary shaft, and when the rotary shaft rotates, the of anti-rotation posts lock the bidirectional rotary block, and preclude the rotary shaft from rotating.

A skylight or roof hatch that is manually opened and closed. The skylight is formed of a window mounted to a casing frame by way of one or more hinges which allows the window to open and close. One more gas springs mounted between the window and the casing frame are configured to exert a force against the inside of the window. The gas springs are used to urge the window into an open position. Once in the open position, the window is closed by overcoming the force exerted by the gas springs. This is achieved by winding in a cable that is connected to the window. A single pulley wheel is part of a control unit which is utilized to spool in the cable connected to the window in order to close the window and to unlock a reel lock to allow for automatic opening of the window.

A skylight or roof hatch that is manually opened and closed. The skylight is formed of a window mounted to a casing frame by way of one or more hinges which allows the window to open and close. One more gas springs mounted between the window and the casing frame are configured to exert a force against the inside of the window. The gas springs are used to urge the window into an open position. Once in the open position, the window is closed by overcoming the force exerted by the gas springs. This is achieved by winding in a cable that is connected to the window. A single pulley wheel is part of a control unit which is utilized to spool in the cable connected to the window in order to close the window and to unlock a reel lock to allow for automatic opening of the window.

The invention relates to a door opening and closing structure including a door plate, a transverse bar, a zipper and a pulling string. When a tension is applied on the pulling string and the tension is greater than a gravity of the transverse bar and at least a portion of the door plate, and the at least a portion of the door plate is driven by the transverse bar to move along the extension direction to form an opening. When the tension is less than the gravity of the transverse bar and the at least a portion of the door plate, the door plate is driven by the transverse bar to move along the gravity direction to reduce the opening.

The invention relates to a door opening and closing structure including a door plate, a transverse bar, a zipper and a pulling string. When a tension is applied on the pulling string and the tension is greater than a gravity of the transverse bar and at least a portion of the door plate, and the at least a portion of the door plate is driven by the transverse bar to move along the extension direction to form an opening. When the tension is less than the gravity of the transverse bar and the at least a portion of the door plate, the door plate is driven by the transverse bar to move along the gravity direction to reduce the opening.

An apparatus for window used for moving a sliding window plate between an insertion position to be inserted into an opening portion of a fixed window plate, an extraction position to be extracted from the opening portion, and an open position to be shifted in a slide direction from the extraction position and to uncover the opening portion, includes a rotary member rotatably supported with respect to the sliding window plate; a drive member moved in a predetermined direction with respect to the sliding window plate; a fixation guide configured to convert a movement of the drive member in the predetermined direction with respect to the sliding window plate into a movement of the sliding window plate in an extraction/insertion direction with respect to the fixed window plate; and a wire configured to pull and move the drive member in the predetermined direction.

An apparatus for window used for moving a sliding window plate between an insertion position to be inserted into an opening portion of a fixed window plate, an extraction position to be extracted from the opening portion, and an open position to be shifted in a slide direction from the extraction position and to uncover the opening portion, includes a rotary member rotatably supported with respect to the sliding window plate; a drive member moved in a predetermined direction with respect to the sliding window plate; a fixation guide configured to convert a movement of the drive member in the predetermined direction with respect to the sliding window plate into a movement of the sliding window plate in an extraction/insertion direction with respect to the fixed window plate; and a wire configured to pull and move the drive member in the predetermined direction.

A hideable bay window is provided. The hideable bay window comprises a window frame, a first horizontal turning plate, a second horizontal turning plate, a vertical translation plate, a first vertical sliding assembly, and a second vertical sliding assembly. The hidable bay window further comprises a pair of bottom support mechanisms. Compared to traditional windows, the present window can be transformed between a fixed window status and a bay window status smoothly and allows the space for the windows to be set according to the needs of the user.

A hideable bay window is provided. The hideable bay window comprises a window frame, a first horizontal turning plate, a second horizontal turning plate, a vertical translation plate, a first vertical sliding assembly, and a second vertical sliding assembly. The hidable bay window further comprises a pair of bottom support mechanisms. Compared to traditional windows, the present window can be transformed between a fixed window status and a bay window status smoothly and allows the space for the windows to be set according to the needs of the user.