| 摘要 |
<p>In order to provide an effective technique in simplifying the vibration-proof structure of a handle equipped in a rotary power tool, a representative rotary power tool (101) is provided with a tool body (103), a rotary-disk shaped tool bit (115), a handle (109), a pivot region (121) and an elastic element (129). The handle (109) coupled to the tool body (103) is disposed in a predetermined initial position in which the handle (109) longitudinally extends parallel to the longitudinal direction of the tool body (103). The handle (109) can rotate with respect to the tool body (103) around the pivot region (121) in any direction crossing the longitudinal direction of the tool body (103). The elastic element (129) is disposed between the tool body (103) and the handle (109) to apply a biasing force to the handle (109) such that the elastic element (129) biases the handle (109) to return to the initial position.
The pivot region comprises a spherical portion (123) provided on any one of the tool body (103) and the handle (109) and a spherical concave portion (125) provided on the other of the tool body (103) and the handle (109) to engage with the spherical portion (123) such that the concave portion (125) relatively rotates with respect to the spherical portion (123). A projection (123b) is formed on a spherical surface (123a) of the spherical portion (123) to define the range of relative rotation of the handle (109).</p> |
