| 主权项 |
1. A ratchet wrench comprising:
a wrench body having a head at one end thereof, the head having a cavity, a first compartment and a second compartment therein, the first compartment intercommunicating the cavity and the second compartment; a ratchet gear rotatably disposed in the cavity of the wrench body and defining a plurality of ratchet teeth, each of the ratchet teeth defining two opposite tooth faces; a pawl movably received in the first compartment of the wrench body, the pawl defining a central tooth, a plurality of first sub teeth and a plurality of second sub teeth in a concave surface on a front side thereof, the first sub teeth and the second sub teeth disposed at opposite sides of the central tooth, a curvature of the concave surface of the pawl being defined such that the first sub teeth and the second sub teeth are located symmetrical relative to the central tooth, a center of the concave surface of the pawl and a center of the ratchet gear being located on a common line that passes through a center of the central tooth of the pawl, the central tooth being fully engaged with two adjacent ratchet teeth of the ratchet gear and two side faces of the central tooth respectively abutting against opposing tooth faces of the two adjacent ratchet teeth, each of the first and second sub teeth defining an inner side face closer to the central tooth, and an outer side face opposite to the inner side face, when the central tooth is fully engaged with two adjacent ratchet teeth of the ratchet gear, the inner side face abuts against opposing tooth face of the ratchet gear, and the outer side face and opposing tooth face of the ratchet gear are spaced apart by a distance; and a switch assembly movably disposed in the second compartment of the wrench body for driving the pawl to engage with the ratchet gear. |
