Appeal No. 95-1401
Application 07/885,364
application. The amendment after final rejection received
February 22, 1994, has been entered (Examiner's Answer, page 2).
We affirm-in-part.
The disclosed invention is directed to a cam mechanism for a
lens barrel which prevents and minimizes slanting or skewing of a
movable annular member. In one claimed embodiment, appellant
provides an annular cam member having two identically shaped cam
grooves which are circumferentially aligned and are offset in the
optical axis direction and corresponding cam pins are installed
on the movable angular member and fitted into the cam grooves.
In a second claimed embodiment, one cam pin is fitted into a
guide groove at the same time it is fitted into a cam groove and
a guide piece unified with the cam pin is fitted into the guide
groove for sliding movement therein.
Claims 12 and 21 are reproduced below.
12. A cam mechanism for a lens barrel, said cam
mechanism comprising:
a stationary annular member having a guide groove
formed thereon;
an annular cam member arranged on said stationary
annular member in such a manner as to permit said annular
cam member to be rotatable around an optical axis of said
stationary annular member and having a first cam groove
formed in a predetermined cam profile thereon;
a movable annular member attached to said annular
cam member in such a manner as to permit said movable
annular member to be movable in an optical axis direction;
- 2 -
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007