SCREWDRIVER

摘要

A screwdriver includes a main body and a switch. The main body is coupled to a handle and includes a pair of parallel, spaced apart slots, and a pawl positioned in each slot. Each pawl is biased outwardly by a spring. The switch is pivotable relative to the main body, and the switch includes a groove extending along an arcuate portion of an inner surface. Pivoting the switch in a first direction moves the switch toward a first position in which the groove is positioned in-line with the first pawl. When the switch is in the first position, the first pawl extends outwardly from the slot and engages the internal tooth surface such that application of a torque in a first direction drives a shank in the first direction and application of a torque in the second direction causes the shank to ratchet relative to the main body.

主权项

1. A screwdriver comprising:
a handle including a first end and a second end and defining an axis therebetween; a main body including a first portion and a second portion, the first portion secured within the handle, the second portion including a pair of slots, the slots oriented parallel to and spaced apart from one another, the slots positioned symmetrically on either side of the axis such that each slot is laterally offset from the axis by an equal distance, the main body further including a spring positioned in each slot; a first pawl positioned within one of the slots and biased outwardly from the slot by one of the springs, the first pawl including a first tooth; a second pawl positioned within the other of the slots and biased outwardly from the slot by the other spring, the second pawl including a second tooth; a shank coupled to the main body proximate the second portion, the shank including a first end and second end, the first end having a circular internal tooth surface aligned concentrically with the axis, the internal tooth surface extending circumferentially around a portion of the second body, the second end having a bore; a bit removably received within the bore of the shank; and a switch pivotable relative to the main body about the axis, the switch including an inner surface extending around at least a portion of the first pawl and the second pawl, the switch including a groove extending along an arcuate portion of the inner surface, the groove positioned radially outwardly from the inner surface relative to the axis, pivoting the switch in a first direction about the axis moves the switch toward a first position in which the groove is positioned in-line with the first pawl, pivoting the switch in the second direction about the axis opposite the first direction moves the switch toward a second position in which the groove is positioned in-line with the second pawl, wherein, when the switch is in the first position, the first pawl extends outwardly from the slot and the first tooth engages the internal tooth surface of the shank such that application of a torque to the handle in a first direction about the axis drives the shank in the first direction while application of a torque in the second direction about the axis causes the shank to ratchet relative to the main body and handle.