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    • 33. 发明授权
    • Imaging lens barrel
    • 成像镜筒
    • US09170396B2
    • 2015-10-27
    • US14565529
    • 2014-12-10
    • FUJIFILM Corporation
    • Masahiro HideshimaTsuyoshi MitaraiAtsushi Misawa
    • G02B15/14G02B7/02G02B7/10G02B7/04G03B3/10G03B13/32
    • G02B7/10G02B7/04G03B3/10G03B13/32G03B2205/0046
    • An appropriate operation angle (actuation angle) corresponding to a use is obtained by a relatively simple structure.A focus ring 20 is mounted around a focus cam 10. When the focus ring 20 is moved to a front end side, a gear formed in the focus ring 20 meshes with a gear 17 of the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10. When the focus ring 20 is moved to a rear end side, the gear formed in the focus ring 20 meshes with pinions 15 mounted on the focus cam 10 and the rotation of the focus ring 20 is directly transmitted to the focus cam 10 through the pinions 15. A half of the rotation angle of the focus ring 20 is the same as the rotation angle of the focus cam 10.
    • 通过相对简单的结构获得与使用相对应的适当的操作角度(致动角度)。 聚焦环20围绕聚焦凸轮10安装。当聚焦环20移动到前端侧时,形成在聚焦环20中的齿轮与聚焦凸轮10的齿轮17啮合,并且聚焦环的旋转 20直接传递到聚焦凸轮10.当聚焦环20移动到后端侧时,形成在聚焦环20中的齿轮与安装在聚焦凸轮10上的小齿轮15啮合,并且聚焦环20的旋转是 通过小齿轮15直接传递到聚焦凸轮10.聚焦环20的旋转角度的一半与聚焦凸轮10的旋转角度相同。