| 摘要 |
PURPOSE:To quickly return a floor part keeping a user getting up at an emergency, during a power failure or the like. CONSTITUTION:This mechanism has a starting shaft 3 capable of being advanced or retracted by turning a thread shaft 2 with a motor and a link pipe 5 with the starting shaft 3 fitted thereinto through a spring member 4 and a rear bottom 7 is linked to the tip of the link pipe 5 through a protruded part 6. The starting shaft 3 and the link pipe 5 are so arranged to allow the constraining thereof or the releasing of the constraining thereof through a retaining means 8 and, when the back bottom 7 is lifted in back, the retaining means 8 is operated to release the constraining of the starting shaft 3 and the link pipe 5 and by a buffer action of a spring member 4, the starting shaft 3 is fitted into the link pipe 5 to reduce back so that the back bottom 7 is tilted or returned. Thus, the constraining of the starting shaft and the link pipe is released by operating the retaining means thereby enabling the tilting or returning of the floor part quickly by a buffer action of a buffer-oriented support means. |
