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US 8,896,933 B2Granted
Lens barrel
AssigneePanasonic Corporation
InventorsTetsuya Uno, Hiroyasu Fujinaka
Life of this patent
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Abstract
A lens barrel includes a first frame and a second frame. The first frame includes a plurality of cam grooves. The second frame includes a plurality of cam followers that engage with each of the plurality of cam grooves, and a gear portion. In this case, if rotational force is transmitted to the gear portion, the second frame moves in the optical axis direction while rotating with respect to the first frame. At least one of the plurality of cam followers is disposed on the image plane side of the gear portion.
Claims9
A lens barrel, comprising:
- a first frame including a plurality of cam grooves;
- and
- a second frame including a plurality of cam followers that engage with each of the plurality of cam grooves, and a gear portion;
- the second frame configured to move along an optical axis while rotating with respect to the first frame if rotational force is transmitted to the gear portion;
- and
- at least one of the plurality of cam followers is disposed farther from a subject side than the gear portion.
3 more elements
A lens barrel, comprising:
- a first frame including a plurality of cam grooves;
- and
- a second frame including a plurality of cam followers that engage with each of the plurality of cam grooves, and a gear portion;
- the second frame is configured to move in the optical axis direction while rotating with respect to the first frame if rotational force is transmitted to the gear portion, and
- at least one of the plurality of cam followers is disposed on the image plane side of the gear portion;
- the plurality of cam followers includes a first cam follower, a second cam follower, and a third cam follower;
- the first cam follower is disposed on the image plane side of the gear portion and is disposed offset to the image plane side with respect to the second and third cam followers;
- the plurality of cam grooves includes a first cam groove, a second cam groove, and a third cam groove;
- and
- the first, second, and third cam grooves guide the first, second, and third cam followers respectively, if the first frame and the second frame rotate relatively, so that the second frame moves in the optical axis direction while rotating with respect to the first frame, and
- the length of the first cam follower in the peripheral direction of the second frame is greater than the length of the first cam follower in the optical axis direction.
8 more elements
Dependencies are inferred from the claim text.