Patent
1987-12-29
1989-07-04
Arnold, Bruce Y.
350247, 350429, 3541951, G02B 710, G03B 300
Patent
active
048445860
ABSTRACT:
Adjustment apparatus for a lens barrel comprises a built-in driving motor; an output gear which is arranged with have its rotation shaft parallel to the optical axis of the lens barrel and to transmit the rotation of the driving motor; a lens driving device which has a transmission gear engaging the output gear and is arranged to shift the lens of the lens barrel in the optical axis direction by using the rotation of the driving motor as a drive source; and an adjustment cam ring which has a tapered cam part and is rotatable around the optical axis. The tapered cam part abuts on the rotation shaft of the output gear. Back-lash adjustment between the output gear and the transmission gear can be accomplished by moving the position of the output gear by rotating the cam ring around the optical axis.
REFERENCES:
patent: 4000501 (1976-12-01), Sakaguchi et al.
patent: 4322151 (1982-03-01), Weiss
patent: 4380378 (1983-04-01), Tamura
patent: 4386829 (1983-06-01), Sumi
patent: 4390260 (1983-06-01), Prinz
patent: 4484800 (1984-11-01), Tamura
patent: 4639083 (1987-01-01), Fuziwara et al.
patent: 4688902 (1987-08-01), Gardam
patent: 4690514 (1987-09-01), Kamata et al.
patent: 4730901 (1988-03-01), Suzuki et al.
Furukawa Hiroshi
Kamata Shigeru
Suzuki Ryuji
Arnold Bruce Y.
Canon Kabushiki Kaisha
Lerner Martin
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