Zoom lens barrel

Details Zoom lens barrel Zoom lens barrel

1996-04-18

1997-08-05

Ben, Loha

Optical: systems and elements

Lens

With support

359694, 359700, 396 87, 396462, G02B 702

Patent

active

056548370

ABSTRACT:
A zoom lens barrel of a camera has an outer ring and an inner ring located inside the outer ring. The inner ring moves relative to the outer ring during zooming. A brush holder having zoom brushes at both ends is supported by one of the inner and outer rings. The zoom brushes are made of an elastic conductive material. Zoom brushes provided at one end of the brush holder come into slidable contact with a zoom code plate, which is supported by the one of the inner and outer rings that does not support the brush holder. Zoom brushes, provided at the other end of the brush holder, contact brush contacting terminals of a flexible printed circuit board. A contact reaction force is created between the zoom brushes, the zoom code plate and the flexible printed circuit board, which provides bias force to press the brush holder against one of the inner or outer rings.

REFERENCES:
patent: 5051764 (1991-09-01), Nomura
patent: 5270868 (1993-12-01), Nomura
patent: 5327184 (1994-07-01), Nomura et al.
patent: 5349475 (1994-09-01), Nomura et al.

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