| 摘要 |
<p>An automatic pressure release toothbrush has a handle (11) with proximal and distal ends, a head (12) having a longitudinal axis (12A) and having bristles (13) extending generally in a first direction transverse of this longitudinal axis, and a hinge (14) connecting the head (12) to the distal end of the handle (11). When excessive force beyond a predetermined magnitude is applied to the head (12), the head (12) automatically moves to a displaced position wherein the toothbrush is temporalily unusable until the head (12) is returned to its normal position.</p> |
