Patent ID: 8810920
Filing Date: 2014-08-19
Classification: G02B

Abstract:
1. A lens barrel, comprising: a first frame that is a substantially cylindrical frame and includes at least three cam grooves disposed spaced apart in a peripheral direction of the first frame, and at least one first side wall component disposed between adjacent ones of the cam grooves; and a second frame configured to be rotatably supported by the first frame so as to have an axial direction in common with the first frame, the second frame including at least three cam followers and at least one protrusion, the at least three cam followers being configured to be inserted into the at least three cam grooves and guided along the at least three cam grooves respectively, and the at least three cam followers being configured to slidably contact the at least three cam grooves respectively, the at least one protrusion being configured to be movable along the at least one first side wall component and being configured to not contact the at least one first side wall component; wherein a position of the at least one protrusion is offset from positions of the at least three cam followers in the axial direction, wherein the position of the at least one protrusion is disposed more towards a positive side of the axial direction than the at least three cam followers, the positive side of the axial direction being towards a subject side; the at least one first side wall component is shorter than the at least three cam grooves.