Patent ID: 9417426
Filing Date: 2016-08-16
CPC Classification: G02B,G03B

Claim Text:
1. A lens barrel comprising: a fixed frame which holds a casing; a ring rotatably held around an outer periphery of the fixed frame; an action part disposed on the fixed frame and provided between the fixed frame and the ring, along the outer periphery of the fixed frame; and a biasing member provided between the fixed frame and the ring, along the outer periphery of the fixed frame, the biasing member being fixed to the fixed frame, wherein: the ring comprises a first action surface to be used at a time of photographing, a second action surface to be used when the casing held by the fixed frame is collapsed into the fixed frame, and a third action surface formed between the first action surface and the second action surface, the action part is configured to be in contact with and move on the first action surface, the second action surface, and the third action surface, the biasing member biases the action part toward the outer periphery of the fixed frame, when the action part moves on the first action surface, a first load is applied to the biasing member, when the action part moves on the second action surface, a second load greater than the first load is applied to the biasing member, and when the action part moves on the third action surface, a load which varies from the first load to the second load is applied to the biasing member.