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Yung Fong Tools Co., Ltd.

Tien Sung Chen

Yu Wen Chen

A controlling structure for a unidirectional ratchet wrench contains a driving head of a unidirectional ratchet wrench, and driving head having a receiving cavity and a groove communicating with the receiving cavity. The receiving cavity has a driving member, and the driving member has a toothed portion. The groove has a retaining block received therein, and the retaining block has a plurality of locking teeth so as to engage with the toothed portion. The retaining block has a slot or a tab so as to retain with the elastic member. The elastic member has a fitting segment, a curved section, and an abutting segment, the fitting segment is fitted into the slot or is retained with the tab, the curved section extends outwardly from the fitting segment and becomes curved, and the abutting segment connects with the curved section and abuts against the groove.

Controlling structure for a unidirectional ratchet wrench

A positioning structure for a ratchet wrench contains a ratchet wrench including a driving head, a receiving cavity, a first groove, a second groove, and a hole. The receiving cavity has a driving member, and the driving member having a toothed portion. The first groove has two opposite retaining blocks each having a plurality of locking teeth so as to engage with the toothed portion and having an orifice and a receiving aperture, and between two receiving apertures is defined a first resilient element. The second groove has a directional control member mounted, and the directional control member has a limiting portion, a recessed portion, an actuation portion, and a shaft, wherein a second resilient element is fitted onto the shaft and is inserted into the hole of the second groove, and the actuation portion is inserted into two orifices of the two retaining blocks.

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Taichung, Taiwan

Tien Sung Chen