| 摘要 |
The adjustable pliers (2, Figure 1A) includes two arms (4, 6) each with jaws (8, 10) and handles (12, 14). One arm has an elongate slot (20, Figure 5) with spaced apart apertures (26a-26h, 32a-32h, Figure 2). The other arm has a pivot member (50) with a profiled section (56) through the slot to connect the arms. The profiled section has a convex curved shape in cross-section having opposing convex curved locking faces 56a, 56f with a common axis Y-Y of curvature and a first radius R1. Convex curved free faces 56b-56e, 56g-56j separate the locking faces and are recessed within a notional outer perimeter 56k. The arms are pivotable to cause either engagement of the locking faces with one of the apertures to determine the opening of the jaws or disengagement of the locking faces to allow movement of the pivot member along the slot to vary the opening of the jaws. The profiled section has a generally curved trapezoidal shape in cross-section tapering towards the locking face 56f. One free face has a second radius R2 less than R1; the other free face has a third radius R3 less than R2. |
