Retaining piece structure for linear motion device, has concave surfaces configured such that as pressing force acting on the surface increases, contact area of each surface increases with adjacent rolling ball

摘要

A retaining piece structure which is interposed between each two adjacent rolling balls in a row comprises concave surfaces configured such that as a pressing force acting on the concave surface increases, a contact area of each concave surface increases with the adjacent rolling ball. A retaining piece structure which is interposed between each two adjacent rolling balls in a row comprises concave surfaces (101) at both side surfaces of the retaining piece in an axial direction of the row. Each concave surface is in contact with a spherical surface of an adjacent rolling ball. It is configured such that as pressing force acting on the concave surface increases, a contact area of each concave surface increases with the adjacent rolling ball.