Title:
PHOTOGRAPHING DEVICE
Document Type and Number:
Japanese Patent JP3403146
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To set operating torque separately for a manual mode and a motor drive mode.
SOLUTION: A cam cylinder 2 which drives a lens group is provided rotatably in a fixed cylinder 1 and a 1st operation ring 4 is fixed to the cam cylinder 2 through a cylindrical drive pin 3. A 2nd operation ring 5 is provided over the 1st operation ring 4 and has its top surface 5c lubricated with high-torque grease and the reverse surface 5b lubricated with low-torque grease. In the motor drive mode, the lens group is slid on only the reverse surface 5b of the 2nd operation ring 5 and in the manual drive mode, the lens group is slid on the top surface 5c of the 2nd operation ring 5, so that the lens group is driven with different operating torque for the manual and motor drive modes.
Inventors:
Hiroshi Fujiike
Kenjo Nakamura
Kenjo Nakamura
Application Number:
JP2000130755A
Publication Date:
May 06, 2003
Filing Date:
November 01, 1994
Export Citation:
Assignee:
Canon Inc
International Classes:
G02B7/02; G02B7/04; G02B7/09; (IPC1-7): G02B7/04; G02B7/02; G02B7/09
Domestic Patent References:
| JP466908A | ||||
| JP5929211A | ||||
| JP63226610A | ||||
| JP60241006A | ||||
| JP62146115U |
Attorney, Agent or Firm:
Yukihiko Hibiya
Previous Patent: INFORMATION INQUIRY SYSTEM, INFORMATION INQUIRY DEVICE AND RECORDING MEDIUM
Next Patent: DOUBLE LOCK APPARATUS
Next Patent: DOUBLE LOCK APPARATUS