Title:
ZOOM LENS DRIVING DEVICE
Document Type and Number:
Japanese Patent JP3198679
Kind Code:
B2
Abstract:
PURPOSE: To form six guide grooves provided in a lens barrel in order to respectively guide three groups of movable lenses constituting a zoom lens and to accurately guide the lenses in the six guide grooves.
CONSTITUTION: The zoom lens is constituted of a 1st lens group, a 2nd lens group and a 3rd lens group attached to lens frames 10 to 12, respectively, and rollers 16 to 18 engaging in the guide grooves 24 of the lens barrel are provided at three spots in a circumferential direction and at two spots in an optical axis direction in the respective lens frames 10 to 12. Six guide grooves 24 are provided in the lens barrel, and three guide grooves 24a, 24c, and 24e are common to the roller 16 of the lens frame 10 and the roller 17 of the lens frame 11, the rollers 16 and 17 are alternately arranged. Other three guide grooves 24b, 24d and 24f are provided to guide the roller 18 of the lens frame 12, and all the rollers can be arranged in the optical axis direction at sufficient intervals.
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Inventors:
Takashi Shimamura
Application Number:
JP32990392A
Publication Date:
August 13, 2001
Filing Date:
November 17, 1992
Export Citation:
Assignee:
Fuji Photo Optical Co., Ltd.
International Classes:
G02B7/10; G02B7/04; (IPC1-7): G02B7/10; G02B7/04
Domestic Patent References:
| JP6010214A | ||||
| JP5929215A | ||||
| JP57115509A | ||||
| JP60217320A | ||||
| JP6012524A | ||||
| JP23622U |
Attorney, Agent or Firm:
Shunji Kagei
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