Lens barrel and optical apparatus

摘要

The lens barrel includes a base barrel, a movable barrel including first and second hole portions, a circumferentially rotatable barrel and first guide members. The base barrel includes straight guide portions guiding the movable barrel along an optical axis, the rotatable barrel includes cam portions moving the movable barrel with rotation of the rotatable barrel, the first guide members engage with the cam and straight guide portions. The cam portions, straight guide portions and first guide members are respectively provided at multiple circumferential phases, a guide member among the first guide members provided at a first phase engages with the first hole portion, each of other guide members among the first guide members provided at two or more second phases engages with each of the second hole portions. A circumferential width of each second hole portion is larger than that of the first hole portion.

主权项

1. A lens barrel comprising:
a base barrel fixed in an optical axis direction and in a circumferential direction about an optical axis; a movable barrel movable with respect to the base barrel in the optical axis direction, the movable barrel including a first hole portion and a plurality of second hole portions, a rotatable barrel rotatable with respect to the base barrel and the movable barrel in the circumferential direction; and a plurality of first guide members, wherein: the base barrel includes a plurality of straight guide portions extending in the optical axis direction to guide the movable barrel in the optical axis direction, the rotatable barrel includes a plurality of cam portions to move the movable barrel in the optical axis direction with rotation of the rotatable barrel, the first guide members engage with the cam portions and the straight guide portions, the cam portions, the straight guide portions and the first guide members are respectively provided at multiple phases which are three or more phases in the circumferential direction, a guide member out of the first guide members provided at a first phase of the multiple phases engages with the first hole portion, each of other guide members out of the first guide members provided at two or more second phases of the multiple phases different from the first phase engages each of the second hole portions, and a width of each of the second hole portions in the circumferential direction is larger than a width of the first hole portion in the circumferential direction in view of a direction perpendicular to the optical axis.