MECHANISM FOR PREVENTING MOVABLE MEMBER OF CHAIR FROM BECOMING RICKETY

摘要

PROBLEM TO BE SOLVED: To make the state of being rickety absorbed and to prevent abnormal sound caused by being rickety from being generated by molding integrally a spring structure projecting toward the other member with a synthetic resin at the site where a movable member and a fixed member are brought into contact with each other. ;SOLUTION: A spring structure 21 is formed integrally with a seat underside cover 17 on the seat underside cover 17 at a position where operational levers 8 and 9 being moving members occupy when they are not operated in a vertical channel 20 through which the operational levers 8 and 9 pass. In this case, whenever the spring structure 21 projects toward the operational levers 8 and 9 being the other members from the base part 22 of the seat underside cover 17 and functions structurally as a spring, the shape is not specifically restricted but a bridge shape, among other things, an arch shape is pref. When a spring structure 21 with a bridge shape is used, as the deformation as the spring structure is large, the amt. of ricketiness to be absorbed becomes large and fluctuation caused by dimensional error of each part can be suppressed and a large spring property can be provided.;COPYRIGHT: (C)1997,JPO