Patent ID: 6883621

Claim:
A power supply structure of an electromotive tool comprising a body comprising: a clamp at one end of the body; and an electromotive motor for driving the clamp to rotate; a control button installed at one lateral side of the body for controlling the electromotive motor; a battery seat being installed at another end of the body; the battery seat containing a battery; a control circuit having an inserting hole; a switch for selecting an external power supply and a battery power supply so as to perform at least one operation; the operation being at least one of initiating a power supply to supply power to the electromotive tool and charging the battery; an over current protection device of a charging circuit for monitoring the charging current to protect the battery from over-current; and a transformer inserting into the inserting hole for supplying external power into the body; wherein by switching the switch of the control circuit to select an external power supply and a battery power supply for supplying power to the body; the control circuit serves to divide an external current for actuating the electromotive motor and charging the battery.