Patent ID: 6412958
Filing Date: 2002-07-02
Classification: G02B

Abstract:
Binoculars comprising:a pair of lens barrel bodies; a pair of eyepiece portions; at least one of said pair of eyepiece portions being provided with an eyepiece frame fixed on one of said lens barrel bodies, a plurality of eyepiece lenses, a diopter adjusting portion that moves all of said plurality of eyepiece lenses by the same movement amount in an optical axis direction, and a via-rotation-drawable type eye cup portion; said diopter adjusting portion including a cam pin fixed relative to said eyepiece frame and a diopter ring that is guided by said cam pin in the optical axis direction by rotating of the diopter ring around an optical axis to move all of said plurality of eyepiece lenses in the optical axis direction; and said eye cup portion including a cylindrical eye cup member that is rotatively disposed at an outer side of said diopter ring and is guided by said cam pin in the optical axis direction by rotating of the cylindrical eye cup member around the optical axis to move said eye cup portion in the optical direction.