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    Semi-automatic string trimmer head
    1.
    发明公开
    Semi-automatic string trimmer head 失效
    Halbautomatischer Trimmerkopf。

    公开(公告)号：EP0351989A1

    公开(公告)日：1990-01-24

    申请号：EP89306883.3

    申请日：1989-07-06

    申请人： White Consolidated Industries, Inc.

    发明人： Haupt, Eugene James

    IPC分类号： A01D34/73

    CPC分类号： A01D34/4162

    摘要： A string trimmer providing an incremental indexing of line when the head is stopped and started. The preferred embodiment of the string trimmer head (1) includes a spool member (40) within the body member (10), the spool member (40) being coaxially positioned within the body member (10) and being rotatable therewith. The spool member (40) includes a grooved end face (55) with a cam channel (60) having at least one switchback (57) and one arcuate segment. A connecting means attached to the body member (10) includes a cam pin (25a) which runs within the cam channel (60). Upon starting the rotation, the cam pin 25a runs along an arcuate segment of the cam channel (60) (permitting relative rotation between the spool member (40) and the body member (10) thereby indexing a length of line (35)) until contacting a switchback (57) stopping point. The cam pin (25a) is biased to move along the switchback (57) and resets along the switchback (57) upon stopping of rotation.

    摘要翻译： 一个字符串修剪器，当头部停止并启动时，它提供线的增量索引。 弦式修剪器头部（1）的优选实施例包括主体构件（10）内的卷轴构件（40），卷轴构件（40）同轴地定位在主体构件（10）内并且可与其旋转。 卷轴构件（40）包括具有带有至少一个折回（57）和一个弧形段的凸轮通道（60）的带槽的端面（55）。 连接到本体构件（10）的连接装置包括在凸轮通道（60）内延伸的凸轮销（25a）。 在开始旋转时，凸轮销25a沿着凸轮通道（60）的弧形段延伸（允许卷轴构件（40）和主体构件（10）之间的相对旋转，从而索引一段线（35）），直到 接触回转（57）停止点。 凸轮销（25a）被偏置以沿着回转（57）移动，并且在停止转动时沿着回转（57）复位。