DRIVING DEVICE OF PHOTOGRAPHIC LENS

摘要

PURPOSE:To control the position of a photographic lens closely by engaging the abutting cams provided at corresponding positions of the 1st and the 2nd movable coil members with a projection which abuts on them and thus specifying the extent of movement of the 1st movable coil member which moves forth and back a photographic lens unit. CONSTITUTION:The abutting cam 15 in a stepped state (three stages in a figure) which is provided to the outer end part of the 1st movable coil member 7 engages with the projection 16 provided at the other end part of the 2nd movable coil member 8. The initial position of the 2nd movable coil member 8 is specified by a spring member 17 so that the projection 16 is at the neutral point 15a of the abutting cam 15, and this spring member 17 is formed in an U shape; and its U bent side 17a is fixed to a yoke 2, and free end sides 17b and 17b' are detained to detaining parts 18a and 18b recessed in both side of the projection 16.