Cam mechanism for lens barrel

Details Cam mechanism for lens barrel Cam mechanism for lens barrel

2005-06-14

2005-06-14

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S701000

Reexamination Certificate

active

06906871

ABSTRACT:
A cam mechanism for a lens barrel includes an annular member which is linearly guided along an optical axis, and having a cam follower on an outer peripheral surface; a cam ring having a cam groove on an inner peripheral surface including a photographing section and an accommodation section, the cam follower being engaged in the cam groove; and a biasing device for biasing the annular member forward to normally press the cam follower against a front cam surface in the cam groove. A rear end portion of the cam groove is open at a rear end surface of the cam ring to serve as the accommodation section, and the cam follower is disengageable from the front cam surface in the cam groove against a biasing force of the biasing device when the cam follower is engaged in the accommodation section.

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