| 摘要 |
PROBLEM TO BE SOLVED: To provide a tumble seat capable of preventing generation of large shock noise upon completion of bounding, and returning the seat to a seating position with small operating effort. SOLUTION: A hinge mechanism 57 is composed of an upper tumble 61, a lower tumble 59, a hinge pin 63 which rotatably joints the upper tumble 61 and the lower tumble 59, a torsion spring 89 of which intermediate portion is wound around the hinge pin 63, one edge side is brought into contact with the upper tumble 61, and the other edge side is brought into contact with the lower tumble 59, an upper bracket 71 which stops the one edge part side of the torsion spring 89 at the upper tumble 61, and a stopper member 73 and a stopper pin 75 which stop the other edge part side of the torsion spring 89 at the lower tumble 59. The torsion spring 89 is set so that the seat is supported with moment which is in an opposite direction to the moment around the hinge pin 63 by the dead weight of the seat and which is smaller than the moment. COPYRIGHT: (C)2007,JPO&INPIT
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