| 摘要 |
An elongated operating shaft supporting a tool at one end, a drive motor at its other end, and transmission means extending through said shaft to drive said tool is provided with a control handle for adjusting the holding and guiding the position and orientation of said tool. The control handle is formed of a unitary body having a handgrip section and an attachment section, which is provided with a hole into which the supporting shaft is inserted and which is formed with sufficient clearance to permit said handle body to be rocked to and fro along the longitudinal axis of the shaft. Spring means is mounted for biasing said handle body along an axis having an inclined position with respect to the longitudinal axis of the shaft so that said surface of the shaft is contacted by the surface of the hole at at least two opposed points, thereby to normally lock the handle body in said inclined position. |
