| 摘要 |
PURPOSE:To provide a spring device which has characteristics in which, with the increase in bending, a load is decreased, by a method wherein a spring and a magnet are commonly used, and the restoration force of a spring produced by displacement of the spring is offset with a magnetic force. CONSTITUTION:A support seat 3 and a stopper 5 are formed by an adsorbing material effecting adsorption by means of a magnetic force, and a moving member 8, having a stepped part 8a making contact with a spring 1, and the compression spring 1 are inserted therebetween. The lower half part of the moving member 8 is of double structure, and a cylindrical magnet 6 is situated therein to form a spring device. A load is applied on the moving member 8, and with the progress of rotation of the spring 1, a distance (a) between the magnet 6 and a stopper 5 is increased, and a distance (b) between the magnet 6 and the support seat 3 is decreased. Thereby, a magnetic attraction force between the magnet 6 and the support seat 3 is increased, and a load exerted on the member 8 can be decreased. |
