Patent attributes
An electronic torque wrench includes a head portion, a handle portion connected to the head portion and having a receiving space, a strain sensor unit disposed in the head portion, and an indicator unit disposed in the receiving space and having a moving unit. The handle portion further has a tubular wall with a through hole communicated with the receiving space. The moving unit has a touching member aligned with the through hole and movable between first and second positions, where the touching member protrudes outwardly of and retracts into the through hole, respectively. A controlling unit is connected electrically to the strain sensor unit and the moving unit, and actuates the touching member when the strain sensor unit detects a torque that is larger than a reference torque level.
