Title:
レンズ鏡筒及び撮像装置
Document Type and Number:
Japanese Patent JP5825783
Kind Code:
B2
Abstract:
A lens barrel that is capable of reducing a size and cost by omitting an actuator only for diaphragm blades, and of preventing a change of a diaphragm aperture due to a variation in a part accuracy of a mechanism that drives diaphragm blades. Diaphragm blades have cam engagement parts, respectively. A holding member holds the diaphragm blades so as to be rotatable in directions to open and close an aperture. An energizing member energizes the diaphragm blades in a direction to open or close the aperture. A moving member has cam surfaces that engage with the cam engagement parts, and moves in an optical axis direction to operate the diaphragm blades by cam actions between the cam engagement parts and the cam surfaces against energizing force of the energizing member. Regulation parts regulate the operations of the diaphragm blades by the energizing force of the energizing member.
Inventors:
Kenichi Katano
Application Number:
JP2010284794A
Publication Date:
December 02, 2015
Filing Date:
December 21, 2010
Export Citation:
Assignee:
Canon Inc
International Classes:
G03B9/02; G02B7/10; G03B9/06
Domestic Patent References:
| JP5061736U | ||||
| JP9211534A | ||||
| JP2001356258A | ||||
| JP10307312A | ||||
| JP2000275509A | ||||
| JP8313969A |
Attorney, Agent or Firm:
Another role Shigehisa