| 摘要 |
A ratchet mechanism for a ratchet tool includes a pawl received in a recess of the head and biased by a bead which is biased by a spring received in a notch defined in an inner periphery of the recess. The pawl has a toothed surface which is matched with outer threaded surface of a driving wheel which is rotatably received in a through hole of the head. A receiving hole is defined through the pawl and opens a top surface of the pawl. A peripheral groove is defined radially outward in an inner periphery of the receiving hole. A shift member has a top board and a rod which extends from an underside of the top board, a stop is connected to a distal end of the rod. The stop and the rod are inserted into the receiving hole and the stop is movably engaged with the peripheral groove.
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