US 6,785,059 B2 · Lens barrel

Abstract

A lens barrel having lens holding frames for holding a plurality of lenses is composed of a first lens, a second lens, one of the lens holding frames holding the first and second lenses, having a first opening disposed at one end in correspondence with the first lens, and having a second opening disposed at another end in correspondence with the second lens, first abutment portions prescribing the position of the first lens in an optical axis direction on the first opening side and disposed at a plurality of positions around the inner periphery of the lens holding frame, a second abutment portion prescribing the position of the second lens in the optical axis direction on the second opening side, first engagement portions disposed at a plurality of positions around the inner periphery of the lens holding frame on a side nearer to the first opening than the first and second abutment portions and engaged with the first lens, and a second engagement portion disposed around the inner periphery of the lens holding frame on a side nearer to the second opening than the first and the second abutment portion and engaged with the second lens, wherein the first engagement portions and the first abutment portions are disposed at different positions in the circumferential direction of the lens holding frame.

Claims19

Dependent claims

A lens barrel having a lens holding frame for holding a plurality of lenses comprising:

a first lens;
a second lens;
a lens holding frame holding the first and second lenses, having a first opening disposed at one end in correspondence with the first lens and having a second opening disposed at another end in correspondence with the second lens;
first abutment portions prescribing a given position of the first lens in an optical axis direction on a side of the first opening and disposed at a plurality of positions around an inner periphery of the lens holding frame;
a second abutment portion prescribing a given position of the second lens in the optical axis direction on a side of the second opening;
first engagement portions disposed at a plurality of positions around the inner periphery of the lens holding frame on a side nearer to the first opening than the first and second abutment portions and engaged with the first lens;
and
a second engagement portion disposed around the inner periphery of the lens holding frame on a side nearer to the second opening than the first and second abutment portions and engaged with the second lens;
wherein the first engagement portions and the first abutment portions are disposed at different positions in measured in a circumferential direction of the lens holding frame.

6 more elements

A lens barrel comprising:

a first lens;
a second lens, a diameter of which is larger than a diameter of the first lens;
an annular lens holding frame holding the first and second lenses, having a first opening disposed at one end in correspondence with the first lens, and having a second opening disposed at another end in correspondence with the second lens, the lens holding frame being molded by a first metal mold on a side of the first opening and a second metal mold on a side of the second opening;
first abutment portions prescribing the position of a first lens in an optical axis direction on the first opening side, disposed at a plurality of positions around an inner periphery of the lens holding frame, and projecting toward the inner periphery of the lens holding frame, respectively, the first abutment portions being molded by the first metal mold;
a second abutment portion prescribing a position of the second lens in the optical axis direction on the second opening side, the second abutment portion being molded by the second metal mold;
first engagement portions disposed at a plurality of positions around the inner periphery of the lens holding frame on a side nearer to the first opening than the first and second abutment portions, and engaged with the first lens, the first engagement portions being molded by the second metal mold;
and
a second engagement portion disposed around the inner periphery of the lens holding frame on a side nearer to the second opening than the first and second abutment portions and engaged with the second lens, the second engagement portion being molded by the second metal mold;
wherein the first engagement portions and the first abutment portions are disposed at different positions in a circumferential direction of the lens holding frame.

6 more elements

Dependencies are inferred from the claim text.

Lens barrel

Life of this patent

Lens barrel

Life of this patent

Abstract

Claims19