Patent ID: 7104144

Claim:
A handle tool with high sensitive electronic strain measurement comprising: a driving portion for driving an object; a handle connected to the driving portion; the driving portion being at one end of the handle; the handle having an integrating element; a first groove and a second groove being formed at two opposite sides of the handle and being near the driving portion; a length of the first groove being greater than that of the second groove; a strain gauge being embedded in the first groove; the strain gauge being electrically connected to the integrating element; the strain gauge being deformable with the deformation of handle of the tool body; the twisting force applied to the handle being calculated by the integrating element; wherein the handle has a rectangular cross section with two long sides and two short sides; the first groove is cut from one of the two short sides into the long sides to form as an approximate U shape groove with a flat bottom and the second grove is cut from the other short side into the long sides to form as an approximate U shape groove with a flat bottom, and thus the first groove and the second groove are exposed at an outer side of the handle tool; wherein the strain gauge located in the first groove is located on the flat bottom of the first groove; wherein a display and at least one adjusting button are installed on the integrating element, the display serves for displaying the twisting force calculated on by the integrating element and the adjusting button serves to change the display unit or calibrate the precise of the display or reset the display.