Lens barrel with interlocking key

Details Lens barrel with interlocking key Lens barrel with interlocking key

1997-04-15

1999-07-20

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359701, G02B 1514

Patent

active

059263237

ABSTRACT:
In a lens barrel which drives a focusing optical system using only one set of a cam groove and a cam pin engaged with the cam groove, the cam groove and the cam pin jointly defining a zooming operation and a focusing operation of the focusing optical system, to increase an automatic focusing speed, there is provided with a manual driving section rotated around an optical axis, an automatic driving section rotated around the optical axis and a rotation straight advance converting section for driving the focusing optical system after converting the rotational motion of the manual driving section or the automatic driving section into a straight advance motion by using only set of the cam groove and the cam pin for jointly defining the zooming and focusing operations of the focusing optical system. The manual driving section, the automatic driving section and the rotation straight advance converting section are interlocked with one another. A power transmitting member for directly transmitting power from the automatic driving section to the rotation straight advance converting section without passing this through the manual driving section is provided.

REFERENCES:
patent: 4002405 (1977-01-01), Stahl
patent: 5689375 (1997-11-01), Satoh et al.

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