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US 5,289,320 AGranted
Apparatus for defining a position of a lens
AssigneeAsahi Kogaku Kogyo Kabushiki Kaisha
InventorTakumi Kobayashi
Life of this patent
Estimating the term…
Abstract
A lens position definition apparatus is provided in, for example, a camera. The apparatus includes a base member, a cam mechanism for controlling a position of the lens relative to the base member along a direction of an optical axis thereof in accordance with a rotational position thereof about the optical axis, and at least one spring for urging the lens in a direction inclined to the direction of the optical axis and the rotation thereof, in order to enable the cam mechanism to operate.
Claims9
An apparatus for defining a position of a lens comprising:
- a base member;
- means for controlling a position of said lens relative to said base member along an optical axis of said lens in accordance with a rotational position of said lens about the optical axis, by urging said lens in a rotational direction, said controlling means further comprising means for urging said lens in a direction along said optical axis of said lens in association with said controlling means urging said lens in a rotational direction;
- and
- at least one spring comprising a coil spring for urging said lens in a direction inclined to the direction of said optical axis in a rotational direction opposite said rotational direction of urging by said controlling means, said at least one spring being tilted such that a central axis thereof is set to be inclined relative to both the directions of the optical axis and the rotation of said lens.
1 more element
Dependencies are inferred from the claim text.