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    • 18. 发明授权
    • Shaft telescoping and rotational adjustment mechanism for a lawn and
garden tool
    • 用于草坪和花园工具的轴伸缩和旋转调节机构
    • US5933966A
    • 1999-08-10
    • US898990
    • 1997-07-23
    • Jan B. YatesGregory A. Trees
    • Jan B. YatesGregory A. Trees
    • A01D34/90B25G1/04A01D50/00A01D55/00
    • A01D34/90B25F5/026Y10T403/599
    • A lawn and garden tool, such as a string trimmer, includes a lower housing, an upper housing having one or more axial channels interconnected with one or more circumferential channels disposed on an interior surface thereof and a shaft connected between the upper housing and the lower housing. A boss is located on an exterior surface of the shaft and is disposed within the channels such that the boss is capable of traveling back and forth between the interconnected axial and circumferential channels. Movement of the boss within one of the axial channels telescopes the shaft while movement of the boss within one of the circumferential channels rotates the shaft and, thereby, rotates the lower housing with respect to the upper housing. The shaft may be moved from a locked position upon actuation of a push-button mechanism located on the upper housing of the string trimmer.
    • 草坪和花园工具,例如弦修剪器,包括下壳体,上壳体,其具有与设置在其内表面上的一个或多个圆周通道互连的一个或多个轴向通道,以及连接在上壳体和下壳体之间的轴 住房。 凸台位于轴的外表面上并且设置在通道内,使得凸台能够在互连的轴向和圆周通道之间来回移动。 当凸轮在一个圆周通道内的运动使轴转动并使下壳体相对于上壳体旋转时,凸轮在轴向通道中的一个内的运动可以望远镜轴。 在位于弦修剪器的上壳体上的按钮机构的致动时,轴可以从锁定位置移动。