Patent ID: 7293367

Claim:
A power-operated tape measure comprising: a case, a annular reel, a tape, a motor, a power supply unit and control switches; the annular reel mounted pivotally on a fixing shaft of the case; the tape wound on the annular reel, a hook at one end of the tape extending out of the case through an outlet on the case; the motor respectively driving the annular reel and a large wheel for sending the tape via a gear train; the motor, the power supply unit and the control switches being combined as a control circuit controlling the direct and reverse turning of the motor; wherein the case being equipped with a button at the bottom that can float upwards and downwards, a small wheel is mounted pivotally inside the button to assorting to the large wheel for sending the tape on the annular reel; the control switches including a switch controlling the extending of the tape and a switch controlling the withdrawal of the tape, the switch controlling the extending of the tape is engaged with the button at the bottom.