Title:
レンズ鏡筒
Document Type and Number:
Japanese Patent JP4190402
Kind Code:
B2
Abstract:
A lens barrel comprises a first frame including an inward flange having an opening as a light path for a photographic optical system, a barrier-driving member disposed in the vicinity of the opening, a second frame disposed inside the first frame and movable along an optical axis relative to the first frame, a barrier blade movable along with the rotation of the barrier-driving member between a closed position in which the barrier blade blocks at least a part of the light path and an open position in which the barrier blade is retracted from the light path, an opening-urging member capable of urging the barrier blade towards the open position and urging the barrier-driving member towards a first direction, and a closing-urging member capable of urging the barrier blade toward the closed position. In the event that an external force, such as photographer's finger, urges the barrier blade toward an open position, the closing-urging member urges the barrier blade to the closed portion when the external force is removed.
Inventors:
Tanaka Tadanori
Yoshihiro Yokomae
Yoshihiro Yokomae
Application Number:
JP2003412611A
Publication Date:
December 03, 2008
Filing Date:
December 10, 2003
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
G03B11/04; G02B7/10; G03B17/00
Domestic Patent References:
| JP2000292830A | ||||
| JP2001133868A | ||||
| JP2001083575A | ||||
| JP2002090835A | ||||
| JP10312003A | ||||
| JP2003315892A | ||||
| JP5061104A |
Attorney, Agent or Firm:
Susumu Ito