Patent ID: 6869220

Claim:
A linear guide device comprising: a plurality of rolling elements; a guide rail extending in an axial direction thereof and having a rolling element rolling groove which is formed in a side wall thereof and is extended in the axial direction; and a slider including a rolling element rolling groove, which faces said rolling element rolling groove of said guide rail, said slider being supported in a manner that said slider is axially movable through the rolling of said rolling elements put in a space defined between said rolling element rolling grooves of said guide rail and said slider, said slider further including a return passage axially passing through said slider and also first and second curved element circulating R-parts which communicate said return passage, said space and said slider so as to form a rolling element endless circulating passage through which the rolling elements are endlessly circulated, wherein a rate of change expressed as “Dmax−Dmin” approaches 0.35, where Dmax and Dmin are respectively a local maximum and a local minimum of D when a first rolling element of said rolling elements moves a distance corresponding to a rolling element-to-rolling element span, D is expressed as (dx 2 −dx 1 )/dx 1 , dx 1 is a minute movement quantity of said first rolling element when it moves from said space to said first curved element circulating R-part, and dx 2 is a minute movement quantity of a second rolling element of said rolling elements when it moves from said second curved element circulating R-part to said space while said second rolling element is moved in accordance with the movement of said first rolling element by the minute movement quantity dx 1 .