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    • 62. 发明授权
    • Autofocus lens barrel
    • 自动对焦镜筒
    • US5293268A
    • 1994-03-08
    • US903270
    • 1992-06-24
    • Yuji IharaNaoya Sugimoto
    • Yuji IharaNaoya Sugimoto
    • G02B7/09G02B7/08G02B15/14G02B7/02
    • G02B7/08
    • An autofocus lens barrel has an optical system shifter for shifting a focusing optical system forward and backward in the direction of the optical axis, a driven pulley rotatively driven around the optical axis for actuating the optical system shifter, and a driving pulley which is driven by receiving a driving force. The driving force is transmitted from the driving pulley to the driven pulley by means of a belt. Preferably, an idler pulley should be proved at a position substantially symmetrical to the driving pulley with respect to the optical axis, and the driving force is transmitted from the driving pulley to the driven pulley and the idler pulley by means of a belt.
    • 自动对焦镜筒具有光学系统移位器,用于沿着光轴方向前后移动聚焦光学系统;驱动带轮,用于驱动光学系统移位器,驱动滑轮由驱动皮带轮驱动;驱动皮带轮由 接受驱动力。 驱动力通过皮带从驱动滑轮传递到从动皮带轮。 优选地,应当在相对于光轴基本对称于驱动滑轮的位置处证明惰轮,并且驱动力通过皮带从驱动滑轮传递到从动滑轮和惰轮。