US Patent 7495851 Moving apparatus

A moving apparatus includes a cylindrical cam barrel provided with a cam groove; a moving member configured to be rotated relative to the cam barrel and moved in a perpendicular direction that is an axis direction of the cam barrel; and a bearing for supporting a support shaft fixed on the moving member in the cam groove, wherein when viewed from the axis direction of the support shaft, a contact position F between the bearing and the cam groove is located closer to the side of the rotation center axis of the moving member than the axis line of the support shaft.