Patent ID: 8164639

Claim:
A driving apparatus for moving a movable body with a driving force of a driving source, comprising: a first member including a first linear groove; a second member including a second linear groove on one surface opposed to the first linear groove, the second member being arranged so as to be movable with respect to the first member; a plurality of first rolling bodies which are held between the first linear groove and the second linear groove and which are linearly arranged spaced a predetermined distance apart from one another; a pressing member for pressing the first member and the second member from a direction perpendicular to an axis line connecting centers of the plurality of first rolling bodies; a pressing force applying member for applying a pressing force to the pressing member; and a plurality of second rolling bodies arranged spaced at a predetermined distance apart from one another on the same plane, between the second member and the pressing member, wherein a plurality of third linear grooves for guiding the plurality of second rolling bodies are formed on either one of the second member or the pressing member, the plurality of second rolling bodies are arranged such that, when an axis line connecting the centers of the plurality of first rolling bodies is projected on a plane which is the same plane on which the plurality of second rolling bodies are arranged, at least one or more of the plurality of second rolling bodies are located on both sides opposed to each other with the axis line sandwiched therebetween within the plane, and the pressing force applying member applies a pressing force to the plurality of second rolling bodies through the pressing member such that a rotational moment around the axis line becomes zero.