| 摘要 |
In a ratchet wrench handle, an operation piece is swingably supported by an axis in a handle head. Positive and reverse rotation claws are disposed on one and the other portions of a distal end surface of an operation piece. The operation piece is provided with a cam edge at its backward end surface. A pressing pin is provided in a switch member such that the pressing pin can freely move into and out of the switch member. The distal end of the pressing pin pressurely contacts with the cam edge through a force of a spring. The switch member is located on a line extended from an imaginary straight line running between the rotation axis of the rotation member and the axis of the operation piece.
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