Patent ID: 7663825

Claim:
A lens barrel device comprising: at least two optical parts holding frames for holding optical parts each having a plurality of first guide grooves extended in optical axis directions of the optical parts, and arranged mutually in parallel to one another; a barrel having the at least two optical parts holding frames arranged in the optical axis direction and housing the at least two optical parts holding frames such that optical axes of the optical parts converge on one point, and including a plurality of second guide grooves allowed to face the plurality of first guide grooves; and a plurality of roller units including a plurality of rollers rotatably provided between the first guide grooves and the second guide grooves, and slidably supporting the at least two optical parts holding frames at a plurality of places for the barrel, wherein positions of the plurality of first guide grooves, the plurality of second guide grooves, and the plurality of roller units provided between the plurality of first guide grooves and the plurality of second guide grooves are shifted in the circumferential directions of the optical parts between adjacent optical parts holding frames of the at least two optical parts holding frames such that the plurality of first guide grooves, the plurality of second guide grooves, and the plurality of roller units are alternately fitted into one another.