Linear guiding mechanism of a zoom lens barrel

Details Linear guiding mechanism of a zoom lens barrel Linear guiding mechanism of a zoom lens barrel

1998-10-22

1999-09-21

Epps, Georgia

Optical: systems and elements

Lens

With support

359704, G02B 702, G02B 1514

Patent

active

059561890

ABSTRACT:
Disclosed is a linear guiding mechanism of a zoom lens barrel which includes: a first cylindrical member provided on an inner periphery thereof with at least one linear guide groove which extends parallel to an optical axis, a code sheet for detecting a focal length being fixed to an outer periphery of the first cylindrical member; and a second cylindrical member provided on an outer surface thereof with at least one guide projection which is fitted in the at least one linear guide groove, respectively, wherein at least part of the code sheet and at least part of the at least one linear guide groove are located at the same position in a circumferential direction of the code sheet, and wherein each of the at least one linear guide groove includes a raised portion which is radially raised from the base of the linear guide groove towards the optical axis.

REFERENCES:
patent: 4717933 (1988-01-01), Ando et al.
patent: 5515129 (1996-05-01), Miyazawa et al.
patent: 5600397 (1997-02-01), Shiokama
patent: 5737644 (1998-04-01), Nomura et al.
patent: 5748388 (1998-05-01), Nomura et al.

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