Abstract: A ratchet seat, a ratchet tool head, and a bidirectional ratchet hand tool are disclosed. A handle unit includes an annular groove and a cavity. A positioning ring is stretchably disposed in the annular groove. A first actuating unit and a second actuating unit are elastically placed one over another in the cavity. An outer peripheral surface of a ratchet seat forms a ratchet toothed portion and a positioning groove. The ratchet seat is movable between a first position and a second position in an up-down direction. When the first position is assumed, the positioning groove is slidably moved to engage with the positioning ring, and the first actuating unit meshes with the ratchet toothed portion. When the second position is assumed, the positioning groove disengages from the positioning ring, and the second actuating unit meshes with the ratchet toothed portion.

Abstract: A reversible ratchet wrench without a switch knob has a handle portion and a head portion. The head portion has an accommodation trough, a detent trough, and a blind hole. A ratchet wheel is disposed in the accommodation trough and displaceable in the accommodation trough toward the handle portion to form a first position and a second position. A detent is disposed in the detent trough. Left and right sides of one surface of the detent are formed with push portions, respectively. An elastic member is disposed in the blind hole and pressed against one of the push portions. For a reverse switch, the ratchet wheel is displaced to the second position and then the ratchet wheel is turned, so that the elastic member is pressed against the other push portion.