Electric tool
An electric tool including: a motor having a stator coil; and a circuit board, wherein the stator coil includes a coil main body and an extending part extending from the coil main body and electrically connected to the circuit board, and wherein the extending part is slacked.
1. An electric tool comprising:
a motor having a stator coil;
a circuit board arranged at a rear side of the motor and having an inner surface facing toward the motor and an outer surface facing away from the motor; and
an insulator including a cylindrical part extending in a cylindrical shape from the stator core toward the circuit board,
wherein the stator coil includes a coil main body and an extending part extending from the coil main body,
wherein the extending part extending from the coil main body is slacked and is configured to wrap around a periphery of the circuit board and electrically connect to the outer surface of the circuit board,
wherein the inner surface of the circuit board faces the coil main body,
wherein the extending part extending from the coil main body extends from the inner surface side of the circuit board to the outer surface side of the circuit board and is bent at the outer surface side to be connected to the circuit board,
wherein the circuit board is fixed to an end of the cylindrical part of the insulator,
wherein the cylindrical part of the insulator includes a cut-out or an opening at a side surface thereof, and
wherein the extending part extending from the coil main body passes through the cut-out or the opening of the insulator as to extend from the inside of the cylindrical part of the insulator toward the inner surface of the circuit board, and then extends from the inner surface side of the circuit board toward the outer surface side of the circuit board.
2. The electric tool according to claim 1 , wherein the extending part is slacked so that at least a portion of the extending part at the second surface side of the circuit board is spaced apart from the second surface of the circuit board.
3. The electric tool according to claim 1 , wherein an axial direction of the cylindrical part is substantially parallel to an axial direction of the motor.
4. The electric tool according to claim 1 , further comprising a rotary striking mechanism which is configured to be powered by a motor and to apply torque on a tip tool by a rotational striking force thereof.
5. The electric tool according to claim 1 , wherein the motor is a brushless DC motor.
6. The electric tool according to claim 1 , further comprising a housing accommodating the motor and the circuit board,
wherein the stator coil and the circuit board are fixed to each other inside the housing.