The present disclosure relates to a hinged door for utilizing space. The hinged door includes a hinge installed at one side of an opening of a structure; a door of which one end is connected to the hinge to open and close the opening in a hinged manner, and configured to be divided into a plurality of unit panels, each unit panel connected slidably to an adjacent unit panel in an opening/closing direction to stretch/retract in the opening/closing direction; and a connection link of which a first hinge axis of one end is connected to the structure and of which a second hinge axis of the other end is connected to the unit panel of a distal end, of the plurality of unit panels, so that a length of the door is stretched/retracted in the process of hinge opening/closing the door, thereby providing a hinged door for utilizing space.

A balance system used with a door of a cupboard comprises a transmission shaft, a first pulley on the transmission shaft, and a balance component. The first pulley is connected to a door belt, one end of the door belt is secured to the first pulley, and the other end of the belt is connected to the door. The balance component comprises a balancing member, a balancing belt and a second pulley on the transmission shaft. One end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member is hung on the second pulley. The first pulley and the second pulley rotate synchronously, and the door belt and the balancing belt are wound oppositely. With the balance system, a small driving force can open/close the door.

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.

A collapsible wall including a support frame and a first series of panels configured to suspend from the support frame with at least one pair of adjacent panels pivotally connected to each other. A second series of panels are configured to suspend from the support frame opposite the first series of panels and include at least one pair of adjacent panels pivotally connected to each other. A bottom sill opposite the support frame is pivotally connected to a bottom portion of the first series of panels and to a bottom portion of the second series of panels. A motor assembly is mounted on the support frame and configured to raise or lower at least one lifting element to raise or lower the bottom sill to collapse or extend the panels in the first and second series of panels.

A balance system used with a door of a cupboard comprises a transmission shaft, a first pulley on the transmission shaft, and a balance component. The first pulley is connected to a door belt, one end of the door belt is secured to the first pulley, and the other end of the belt is connected to the door. The balance component comprises a balancing member, a balancing belt and a second pulley on the transmission shaft. One end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member is hung on the second pulley. The first pulley and the second pulley rotate synchronously, and the door belt and the balancing belt are wound oppositely. With the balance system, a small driving force can open/close the door.

A balance system used with a door of a cupboard comprises a transmission shaft, a first pulley on the transmission shaft, and a balance component. The first pulley is connected to a door belt, one end of the door belt is secured to the first pulley, and the other end of the belt is connected to the door. The balance component comprises a balancing member, a balancing belt and a second pulley on the transmission shaft. One end of the balancing belt is connected to the second pulley, and the other end of the balancing belt is connected to the balancing member, such that the balancing member is hung on the second pulley. The first pulley and the second pulley rotate synchronously, and the door belt and the balancing belt are wound oppositely. With the balance system, a small driving force can open/close the door.

A cupboard has an up-down louvered door. Wherein the door comprises a plurality of louvers, and a lift rack in which the louvers are configured. When people need to open the door, the lift rack lifts and folds up, causing the louvers to fold up, and thus the door is opened; and when people need to close the door, the lift rack descends and extends, causing the louvers to extend, and thus the door is closed. The door can open adequately so as to facilitate taking out/putting in articles. No more space is occupied while opening the door, and the door is safe when closing. A small driving force can open/close the door, and the cupboard features easy operation, long lifetime, low cost and good stability.