Lens barrel of a zoom lens
First Claim
Patent Images
1. A lens barrel for a zoom lens having a first lens group and at least one second lens group the first and second lens groups moving as a linked unit during zooming, said lens barrel comprising:
- a stationary cam ring capable of being fixedly mounted on a camera body;
a movable cam ring rotatably supported relative to said stationary cam ring;
a first lens holder for holding said first lens group at a location outside said stationary cam ring and said movable cam ring;
a second lens holder for holding said second lens group at a location inside said stationary cam ring and said movable cam ring; and
a connecting means for connecting said first and second lens holders via said first and second cam rings.
1 Assignment
0 Petitions
Accused Products
Abstract
A lens barrel of a zoom lens is comprised of a plurality of lens groups securely held by respective movable lens holders, a stationary cam ring having one or more stationary cam slots, a movable cam ring having one or more movable cam slots and rotatably supported about the stationary cam ring, and one or more pins extending through the stationary cam ring and the movable cam ring for connecting the first and second movable lens holders to move them together at the time of zooming.
6 Citations
9 Claims
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1. A lens barrel for a zoom lens having a first lens group and at least one second lens group the first and second lens groups moving as a linked unit during zooming, said lens barrel comprising:
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a stationary cam ring capable of being fixedly mounted on a camera body; a movable cam ring rotatably supported relative to said stationary cam ring; a first lens holder for holding said first lens group at a location outside said stationary cam ring and said movable cam ring; a second lens holder for holding said second lens group at a location inside said stationary cam ring and said movable cam ring; and a connecting means for connecting said first and second lens holders via said first and second cam rings. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A lens barrel for a zoom lens having a first lens group and at least one second lens group, with the first and second lens groups moving as a linked body for zooming, said lens barrel comprising:
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a stationary cam ring capable of being fixedly mounted on a camera body and having at least one first cam slot; a movable cam ring having at least one second cam slot and rotatably supported relative to said stationary cam ring; a first lens holder for holding said first lens group at a location outside said stationary cam ring and said movable cam ring; a second lens holder for holding said second lens group at a location inside said stationary cam ring and said movable cam ring; at least one pin which is connected with said second lens holder and moves along with an intersection between said first and second cam slots; and a connecting means for connecting said first and second lens holders via said first and second cam rings.
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9. A lens barrel of a zoom lens having at least two lens groups with the first and second lens groups moving in a linked body for zooming, said lens barrel comprising:
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a stationary cam ring fixedly mounted on a camera body and having at least one first cam slot; a movable cam ring having at least one second cam slot and rotatably supported relative to said stationary cam ring; a first lens holder for holding said first lens group at a location outside said stationary cam ring and said movable cam ring; a second lens holder for holding said second lens group at a location inside said stationary cam ring and said movable cam ring; and at least one pin which connects said first and second lens holders via an intersection between said first and second cam slots and moves along with the intersection.
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Specification