| 摘要 |
The present invention relates to a gas cylinder having a chair restoration function, comprising: a spindle pipe penetrating a spindle guide to move up and down, forming an upper cap of a gas injection hole at the top, and having an inner part sealed by combining a gas chamber with the bottom; a cylinder rod which combines the bottom with the lower part of the outer shell pipe, of which the upper part penetrates into the spindle pipe, which combines a piston with the top, which forms a circular groove on the circumferential border of the piston, which inserts an O-ring into the circular groove to be combined, and which forms a path to communicate with the upper and lower sides of the O-ring on the adhesive surface of the O-ring of the circular groove; and a cam part which combines the lower cam with the spindle pipe and which combines the upper cam with a piston rod. The outer shell pipe combines a stopper with a fixation plate, combines a rotator downwardly perforated with the bottom of the spindle pipe, and allows the rotator to respond to the stopper by rotating. Therefore, softness of a cushion can be uniformly maintained in an up-and-down movement of the spindle pipe regardless of load. A rotary angle of a seat can be limited for the restoration of the original angle when returning the seat by automatic alignment. Separation of various parts can be prevented by conveniently and easily injecting nitrogen gas into the spindle pipe and the crashing sound caused by a collision of the upper cam (153) and lower cam (151) can be prevented by its smooth operation while in use. |
