Lens barrel and imaging device
AssigneeFUJIFILM Corporation
InventorsYukitaka Takeshita, Mitsuhiko Oka, Shiro Hashimoto
Life of this patent
Estimating the term…
Abstract
A lens barrel includes an imaging optical system, a diaphragm operation ring, and click-stop mechanisms. The click-stop mechanism includes a first spherical body, first fitting portions, and a first biasing member. The click-stop mechanism includes a second spherical body, second fitting portions, and a second biasing member. The first spherical body is fitted to the first fitting portion in a case in which the diaphragm operation ring is set to a position corresponding to main series. The second spherical body is fitted to the second fitting portion in a case in which the diaphragm operation ring is set to a position corresponding to subordinate series.
Claims5
A lens barrel comprising:
- a lens barrel body that receives a diaphragm;
- a diaphragm operation ring that is rotatably mounted on the lens barrel body and is capable of being set to a plurality of first rotational positions where an AV value of the diaphragm is set to predetermined integer values and a plurality of second rotational positions where the AV value is set to predetermined fraction values;
- first and second spherical bodies that are provided between the lens barrel body and the diaphragm operation ring and are disposed at positions different from each other in a circumferential direction of the diaphragm operation ring;
- first fitting portions which are formed on one of the lens barrel body and the diaphragm operation ring so as to correspond to the respective first rotational positions and to which the first spherical body is fitted in a case in which the diaphragm operation ring is set to each of the first rotational positions;
- and
- second fitting portions which are formed on one of the lens barrel body and the diaphragm operation ring so as to correspond to the respective second rotational positions and to which the second spherical body is fitted in a case in which the diaphragm operation ring is set to each of the second rotational positions,
- wherein a fitting amount of the first spherical body with respect to the first fitting portion is larger than a fitting amount of the second spherical body with respect to the second fitting portion, and
- wherein a ratio of the volume of a portion of the first spherical body fitted to the first fitting portion to the entire volume of the first spherical body is substantially equal to a ratio of the volume of a portion of the second spherical body fitted to the second fitting portion to the entire volume of the second spherical body.
Dependencies are inferred from the claim text.