Patent ID: 8418290

Claim:
A motorized bed comprising: a bed body; and at least one driving device connected with the bed body; wherein the bed body includes: a base frame; a fixed frame fixedly mounted on the base frame; and at least one movable frame pivotally movable relative to the fixed frame and the base frame; wherein the driving device includes: a drive unit pivotally mounted on the fixed frame of the bed body; a guide tube mounted on the drive unit; a threaded rod rotatably mounted in the guide tube and driven by the drive unit; an actuating source connected with the drive unit to drive the threaded rod; an extension tube movably mounted in the guide tube and having a first end provided with a push portion movable in the guide tube and a second end provided with a pivot portion pivotally connected with the movable frame of the bed body to drive and move the movable frame of the bed body relative to the fixed frame of the bed body; and a threaded mover screwed onto and moved by the threaded rod to abut the push portion of the extension tube, with the threaded mover movable relative to the extension tube to space the threaded mover from the push portion of the extension tube.