Electric motor-driven tool, and control device and control circuit therefor

Abstract

An electric motor-driven tool is configured to make a notification to a worker about a set value of tightening torque as necessary before starting tightening work. An electric motor-driven screwdriver includes an electric motor-driven screwdriver body capable of changing a setting of the magnitude of tightening torque to be applied when tightening a screw, and a notification device for making a notification to a worker about a set value of tightening torque. If the set value of tightening torque has been set to a value greater than a threshold value (reference value), a control circuit of the electric motor-driven screwdriver sends a notification execution signal to the notification device before the electric motor-driven screwdriver body is started to be driven, thereby enabling a notification to the worker to be made by the notification device.

Dependencies are inferred from the claim text.