Positioning device for a switch member of a reversible ratchet-type wrench

摘要

A reversible ratchet-type wrench includes a handle and a head extended from the handle. A web defined between the handle and the head includes a cavity communicated with a hole of the head and a receiving hole communicated with the cavity. An inner periphery defining the receiving hole includes a first positioning notch and a second positioning notch. A pawl is mounted in the cavity and includes a first side with teeth for meshing with teeth of a drive member rotatably mounted in the hole of the head. A switch member includes a turn-piece outside the receiving hole of the web for manual operation. The switch member further includes a positioning section extending from the turn-piece and a switching section extending from the positioning section. The positioning section is rotatably received in the receiving hole of the web and has a positioning member retained in one of the first positioning notch and the second positioning notch of the receiving hole of the web. A biasing/actuating member has a first end attached to the positioning section of the switch member and a second end attached to a second side of the pawl for biasing the teeth of the first side of the pawl to engage with the teeth of the drive member.