Title:
LENS DRIVING DEVICE
Document Type and Number:
Japanese Patent JP3031127
Kind Code:
B2
Abstract:
PURPOSE: To remove the rotational backlash of a nut while absorbing deviation between a guide bar and a lead screw, and to directly transmit the rotational driving force of the lead screw to a lens holder without a time lag.
CONSTITUTION: This lens driving device is provided with the lens holder 1 guided by the guide bar 4 disposed in parallel with an optical axis in a lens barrel, and the nut 8 screwed with the lead screw 6 and transmitting the driving force of the screw 6 to the lens holder 1; and the lens holder 1 is provided with a housing part 1d where the nut 8 can be relatively displaced to the holder 1 within a limited range on a plane perpendicular to the optical axis and can not relatively be displaced in an optical axis direction, and a shake preventing fitting part 1c regulating the rotation of the nut centering around the screw 6.
Inventors:
Hideo Igari
Haruji Yamamoto
Haruji Yamamoto
Application Number:
JP20575093A
Publication Date:
April 10, 2000
Filing Date:
July 28, 1993
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/04; (IPC1-7): G02B7/04
Domestic Patent References:
| JP4119414U |
Attorney, Agent or Firm:
Yukio Takanashi