PURPOSE: To hold a satisfactory lubricating state even when high temperature running and endurance running are performed by providing a recessed part for oil basin at a sleeve inner plane position equivalent to the screw ridge base part of the female screw of the sleeve of a lens moving frame.
CONSTITUTION: This device is equipped with the lens moving frame 7 which holds a lens and a feed screw bar 5 interlocked with the output shaft 1a of a stepping motor 1 by engaging with the female screw 6 provided at the inner plane of the sleeve 7a of the lens moving frame 7. One or plural recessed parts 11 for oil basin are provided at the inner plane position of the sleeve 7a equivalent to the ridge base part of the female screw 6. When the feed screw bar 5 is rotated by the stepping motor 1, the lens moving frame 7 is moved in the direction of optical axis via the female screw 6 with which the feed screw bar 5 is engaged. At this time, grease in the recessed part 11 for oil basin is supplied to an engaging part by the rotation of the feed screw bar 5. Therefore, it is possible to always keep the lubricating state of the engaging part formed on the inner plane of the sleeve 7a of the lens moving frame 7 satisfactorily even after the high temperature running is performed.
MATSUDA KAZUYA
NAKAJIMA SHIGEO
TSUZUKI MASAHIKO
