| 摘要 |
In a single hand-actuated pick-up tool of the type comprising an elongated shaft terminating at spaced-apart upper and lower ends, a pair of spaced-apart, pick-up fingers extending from the lower end of the shaft including a pair of springs for biasing them apart, and a pair of ribbons including a handle with a finger-actuable trigger at the upper end, biased apart from the handle, for drawing the fingers together as the trigger is squeezed against the handle, the improvement of providing for the fingers to be able to close together and form locked configurations less than the fully-opened configuration including an arm extending from the trigger for reciprocal motion as a function of movement of the trigger, at least one notch formed in the arm adapted for engagement with a stop in the handle, a spring urging the arm into sliding contact with the stop as the trigger is moved and, a lever pivotally mounted at the upper shaft end for movement between a first unlocked position that permits the spring to retain the arm in contact with the stop and a second, unlock position where the arm is moved out of contact with the stop to permit full range of motion of the fingers from full open to full closed.
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