| 摘要 |
PURPOSE: A support device is provided to drive two supporting bars expanded right and left or up and down with small force, and facilitate the expansion of the supporting bars even in small space while a rotation knob part is rotated repeatedly at a certain angle. CONSTITUTION: A support device comprises; a body(10); supporting bars(20); and a supporting part. In the body, a rotation knob part(19) is installed in one side, and a rotation gear(12), of which the rotation direction is changed by a gear stopper(14) of a store-room(11) connected to the rotation knob part, is installed, and screw shaft pipes(18) are formed in both sides of the rotation gear. The supporting bars are expanded or shrunk simultaneously by corresponding to a threaded part of the screw shaft pipe. The supporting part is movably installed in each end of two supporting bars, and contacted to each wall.
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