Light amount adjusting apparatus, lens barrel, and imaging apparatus

摘要

Provided is a light amount adjusting apparatus wherein a base member has a plurality of supporting parts for supporting the plurality of light amount adjusting blades and a second contact part is located outside a circle extending through the plurality of supporting parts, wherein a contact part between the second contact part and a first contact part is constituted at the other surface of the base member with respect to a surface having a jointing part between a blade driving member and the base member, and wherein, when the blade driving member is pivoted in the circumferential direction of an opening, a part of the blade driving member overlaps at least one of the supporting parts for supporting the light amount adjusting blades at a position offset in a direction parallel to the center axis of the opening.

主权项

1. A light amount adjusting apparatus comprising:
a base member having an opening formed therein; a blade driving member that has a first contact part configured to transmit a driving force and a plurality of first blade engaging parts formed around the circumference of the opening, the blade driving member pivotally engaging relative to the base member in the circumferential direction of the opening; and a plurality of light amount adjusting blades arranged around the circumference of the opening and each having a second blade engaging part configured to engage with one of the plurality of first blade engaging parts at a first side of the base member, wherein the base member has a plurality of supporting parts supporting the plurality of light amount adjusting blades at the first side and arranged around the circumference of the opening, wherein the first contact part is disposed outside a circle extending through the plurality of supporting parts and at a second side of the base member opposite the first side.