Power/manual lens barrel having a manual operating ring

Details Power/manual lens barrel having a manual operating ring Power/manual lens barrel having a manual operating ring

2005-04-12

2005-04-12

Mack, Ricky (Department: 2873)

Optical: systems and elements

Lens

With variable magnification

C359S694000

Reexamination Certificate

active

06879445

ABSTRACT:
A lens barrel includes a stationary member; a rotary input shaft; a manual operating ring rotatably supported by the stationary member and rotated by the rotary input shaft via a gear mechanism; an optical element movable along the optical axis by rotation of the manual operating ring; a hollow-cylindrical output gear having a cylindrical inner peripheral surface in which the rotary input shaft is fitted, and an outer gear portion; a non-circular cross section portion formed on the rotary input shaft to form an accommodation space between the rotary input shaft and the cylindrical inner peripheral surface; a ball installed in the accommodation space; and a biasing device for making the orthogonal surface and the ball come into pressing contact. The non-circular cross section portion is shaped so that the rotation of the rotary input shaft is transferred to the hollow-cylindrical output gear via the ball.

REFERENCES:
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patent: 5239417 (1993-08-01), Eguchi et al.
patent: 5969889 (1999-10-01), Iikawa et al.
patent: 6025964 (2000-02-01), Yamamoto
patent: 6075655 (2000-06-01), Funahashi et al.
patent: 6501604 (2002-12-01), Onda
patent: 6631035 (2003-10-01), Iikawa et al.
patent: 20020018296 (2002-02-01), Kashiwaba et al.
patent: 20030095337 (2003-05-01), Tu et al.

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