Patent ID: 7121362

Claim:
An electrical hand tool comprising: a tool assembly having a body with an internal mechanism mounted inside the body and adapted for driving a tool to rotate; a battery pack adjustably connected to the body of the tool assembly and electrically connected to the internal mechanism to provide electrical power to the internal mechanism; an adjusting device mounted between the body of the tool assembly and the battery pack to connect the battery pack to the body and comprising an adjusting base rotatably attached to the body and attached to the battery pack in a non-rotatable manner; and an adjusting post mounted between the adjusting base and the body and having a top; a bottom; a central hole defined through the adjusting post; a positioning collar formed on and protruding from the bottom; and multiple positioning notches defined in the positioning collar to divide the positioning collar into multiple positioning tabs; a locking knob moveably attached to the adjusting base, corresponding to the positioning collar on the adjusting post and having a locking stub held in one of the positioning notches in the positioning collar to abut with corresponding adjacent positioning tabs; and a biasing member mounted inside the adjusting base and abutting against the locking knob to keep the locking stub of the locking knob being held inside a corresponding positioning notice; wherein one of the positioning tabs on the positioning collar has a block formed on an inner surface of the positioning tab and corresponding to and abutting against the locking stub when the locking knob is pushed.