Patent ID: 9000936
Filing Date: 2015-04-07
Classification: B25B

Abstract:
1. A torque warning hand tool comprising: a main body, a drive head being disposed at least one end of the main body for tightening a work piece; a torque detector disposed on the main body; a control display device disposed on the main body; and a warning unit disposed on the main body; the torque detector, the control display device and the warning unit being electrically connected to each other; the torque detector serving to detect the bending strain of the main body and output a torque value; the control display device being used to set a preset value and receive the torque value of the torque detector, the control display device including an operation unit for comparing the torque value with the preset value, the warning unit having three warning modes including a first warning mode, a second warning mode, a third warning mode, and three colored light sources with different colors corresponding to the warning modes respectively, the colored light sources serving to emit corresponding colors of light according to different warning modes, after the control display device compares the torque value with the preset value, the control display device driving the corresponding mode of the warning unit according to the mode range in which the torque value falls; wherein the warning unit provides three warnings corresponding to the three warning modes when the torque value being in the range of 96%-110% of the preset value, the first warning mode, the second warning mode, and the third warning mode are respectively defined as the torque value being in a range of 96%-99%, 99%-104% and 104%-110% of the preset value, and the warning unit further having a critical mode, the critical mode falls in the second warning mode, the critical mode not corresponding to any colored light sources, wherein, when the torque value falls in the critical mode, none of the colored light sources will emit light in the critical mode.