Lens barrel and imaging device

  • US 8,665,535 B2
  • Filed: 07/15/2010
  • Issued: 03/04/2014
  • Est. Priority Date: 07/27/2009
  • Status: Active Grant
First Claim
Patent Images

1. A lens barrel comprising:

  • a first support frame having a cam groove, the cam groove having a first guide face and a second guide face; and

    a second support frame having an annular main body with a cam follower extending outwardly from the main body in a radial direction and slidably disposed in the cam groove, the cam follower havinga first cam portion,a second cam portion, anda connecting portion configured to connect the first cam portion and the second cam portion; and

    wherein the first cam portion, the second cam portion, and the connecting portion are integrally formed as a one-piece, unitary member;

    the cam groove includesa first region and a second region,the first cam portion contacting the first guide face and the second guide face in the first region,the second cam portion contacting the first guide face and the second guide face in the first region,the first cam portion contacting the second guide face, but not the first guide face, in the second region, andthe second cam portion contacting the first guide face, but not the second guide face, in the second region;

    the second support frame is configured to advance and retract relative to the first support frame by sliding the cam follower in the cam groove once the second support frame is rotated relative to the first support frame; and

    a first concave portion is formed between the connecting portion and the first guide face, and a second concave portion is formed between the connecting portion and the second guide face, if both the first cam portion and second cam portion contact both the first guide face and the second guide face.

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