RATCHET WRENCH WITH A DIRECTION SWITCHING DEVICE

摘要

A ratchet wrench includes a direction switching device. The direction switching device includes two switching members for controlling the rotational direction of a gear, a resilient unit disposed among a body and the switching members for biasing the switching members away from the gear, and a ring unit disposed rotatably on the body. The ring unit includes a convex portion and a concave portion, and is operable to allow the convex portion and the concave portion to act on the switching members, so that one of the switching members comes into contact with the gear, while the other of the switching members is removed from the gear. When no external force is applied to the ring unit, the switching members are biased by the resilient unit to remove from the gear.

主权项

1. A ratchet wrench comprising:
a body; a driving head extending rotatably through said body; a pawl unit contactable with said driving head for changing a rotational direction of the driving head; a gear co-rotatable with said pawl unit relative to said body about a Z-axis between a positive-direction position and a reverse-direction position; and a direction switching device including: a switching unit including two switching members adjacent to each other and each convertible between a first state and a second state, each of said switching members being not in contact with said gear when in said first state, and meshing with and rotating said gear when in said second state, such that said gear is rotated in a direction by one of said switching members, and in an opposite direction by the other of said switching members, a resilient unit disposed among said body and said switching members for biasing said switching members away from said gear such that, when no external force is applied to said switching members, said switching members are spaced apart from said gear, and a ring unit surrounding an X-axis perpendicular to the Z-axis, said ring unit including at least one convex portion and at least one concave portion, said ring unit being rotatable relative to said body so as to allow said convex portion and said concave portion to act on said switching unit, thereby converting one of said switching members from said first state into said second state against biasing action of said resilient member, and allowing the other of said switching members to be biased to said first state by said resilient unit.