板ばねを利用した直動および回転機構

Abstract

The use of leaf springs has found wide application in measuring and scientific instruments. The advantages of the leaf spring mechanisms are as follow: (1) Provide movement without friction or backlash so that high accuracy and good repeatability can be obtained. (2) Simple and low costs, and no lubrication is required. This paper deals with new mechanisms using leaf springs. The parallel movement devices are consisted of a pair of parallel leaf springs having identical length, width and thickness. In these movement devices, the displacement in perpen-dicular direction is increased when the upper member was moved lateral with respect to the bottom member, or increased resistance to any vertical loads, which may be imposed on the mechanism. It was achieved by using original compound leaf spring movement mechanism. In the mechanism, the displacement in perpendicular direction was 0.8μm while the track was 10mm long. A new rotary mechanism was also considered. In the mechanism, the disadvantageous displacement was within 2μm and movement of the axis of rotation was within 5μm where the radius was 92.5 R while the rotation was 6.2 degree.