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.

A printable interchangeable vertically retractable front cover system for a Murphy bed may provide a cover assembly, a cover framing assembly, a cover drive assembly, and a Murphy bed assembly. The cover assembly may vertically deploy to conceal a Murphy bed in the upright position and may vertically retract for the bed frame and mattress to be lowered to the floor. The cover assembly may include a positionable cover having a continuous seamless printable surface that may accept high resolution printed imagery such as photographs and artwork. The cover may vertically retract and deploy with the aid of its own drive assembly. The positionable cover may either roll up or fold up into a compact cover assembly which may be uniquely removably mounted to the cover framing assembly to allow for quick and easy transition from one cover assembly to another, thus making it uniquely interchangeable. For the first time, a Murphy bed owner may have the ability to quickly update the appearance of his or her stowed Murphy bed, such as with changing seasons, styles or interests.

A door mechanism that includes a track that includes a lip, and a door mounted on the track that includes a first slat, and a second slat, where the first slat includes a first tab and the second slat includes a second tab, and where the door is mounted on the track using the first tab and the second tab.