| 摘要 |
<p>A reversible ratchet tool has a toothed drive ring and a coaxial toothed core (40). A pivotal toothed double-ended pawl (90) is secured to the core and is selectively shiftable to intercouple the driving ring teeth (34) with the core for driving the core and hence any tool element in either of two opposite senses of rotation. The means for pivotally shifting the pawl are responsive to finger pressure applied to switch-like arms (176, 178) to effect, through intercoupling linkage of a shaft (130) and spring loaded probe (146) bearing on an undersurface of the pawl the pivotal shifting between first and second driving-ring-engaging operational positions. The paw shifting means is manipulable with the same hand used to hold and to operate the tool, and there is provided a differentiated surface (180) of one arm (176) of the switch whereby the tool user may palpably or visually perceive in which rotational mode the tool is set. </p> |
