| 主权项 |
1. A lens tube comprising:
a cylindrical exterior member having one axial end disposed on an object side and the other axial end disposed on an image side; a cylindrical protective member including an elastic body protecting the exterior member; and a cylindrical attachment-mounting member disposed on the inside of the exterior member, the cylindrical attachment-mounting member being configured to mount an attachment, the protective member including:
a cylindrical body disposed between the exterior member and the attachment-mounting member in a radial direction of the exterior member;an exterior-member protection portion provided at an axial end on the object side of the cylindrical body to project to the object side from an end surface on the object side of the exterior member; anda flange portion provided at an axial end on the image side of the cylindrical body, the flange portion projecting radially inwardly from an inner periphery of the cylindrical body, facing an axial end surface on the image side of the attachment-mounting member in the axial direction of the attachment-mounting member, the cylindrical body and the flange portion having at least three notched portions formed in a circumferential direction to be notched to penetrate from outer peripheral surfaces of the cylindrical body and the flange portion to the inner peripheral surfaces thereof, the attachment-mounting member including at least three fixing portions on the outer periphery in a circumferential direction, the fixing portions being configured to fix the exterior member, the fixing portions being disposed to be positioned on the inside of the notched portions. |
