| 主权项 |
1. A ratchet wrench comprising:
a head having a handle extending therefrom, the head having a first room defined through a top and a bottom thereof, a second room defined in an inner periphery of the first room, a first groove defined in the inner periphery of the first room and located close to the top of the head, a recess defined in an inner periphery of the second room; a ratchet wheel rotatably received in the first room and having an engaging portion defined in an outer periphery thereof, the engaging portion having ratchet teeth, a mounting portion defined axially to the ratchet wheel; a pawl received in one side of the second room and having a front side and a rear side, multiple engaging teeth defined in the front side of the pawl and engaged with the ratchet teeth of the engaging portion, the pawl having a first end and a second end, a contact face formed to the second end of the pawl, a volume of the pawl being ½ to 7/10 of a volume of the second room, a plane passing through a central axis of the first room and a central axis of the recess, an angle of 20 to 30 degrees defined between the contact face and the plane; a resilient member received in the recess and biased between an inner end of the recess and the rear side of the pawl so as to engage the engaging teeth of the pawl with the ratchet teeth of the engaging portion; a restriction member received in the second room and having a first contact portion, a second contact portion and a contact corner, a gap between the first contact portion and the contact face is 0 to 1 mm, the second contact portion contacting the engaging portion, the contact corner contacting an inside of the second room, and a clip engaged with the first groove to restrict the ratchet wheel in the first room. |
