| 摘要 |
A ratchet screwdriver includes a handle, a shaft and a ratchet switch device. The shaft is connected to the front end of the handle and a mounting member is connected to the handle so as to be connected with the shaft. The ratchet switch device is located in the chamber in the rear end of the handle and includes a base, a frame, two engaging members, a positioning member, a resilient plate, two positioning pieces, and a ratchet member a switch. The shaft can be replaced by operating the mounting member on the handle. The switch on the rear end of the handle can change the direction of the ratchet member to output torque via the shaft. |
