| 摘要 |
A ratchet wrench includes a handle and an annular head formed on the handle. The annular head defines a first space, a second space in communication with the first space and a third space in communication with the second space. An annular gear is positioned rotationally in the first space. In the second space is a direction controller including two pawls and a spring between the pawls. Partially in the third space is a direction switch for engaging selective one of the pawls with the annular gear. The direction switch defines a recess. On the annular head is a spring-biased rod detent for automatic insertion into the recess after the direction switch is moved partially in the third space, thus locking the direction switch to the annular head while allowing the rotation of the direction switch on the annular head.
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