Hair curler with adjustable torque

A hair curler with adjustable torque, including:

• a working portion, for being disposed with a hair roller;
• a driving device, driving the working portion to rotate via a decelerating device;
• a circuit board, controlling the driving device;
• a control portion, connected with the circuit board to control the driving portion to drive the working portion to rotate about a first direction, about a reverse second direction, or stop rotating;
• a torque detecting device, connected with the working portion to detect a torque of the working portion about the first direction and to send a value of the torque detected to the circuit board;
• a torque display device, connected with the torque detecting device to display a value of the torque detected by the torque detecting device;
• a torque setting portion, connected with the circuit board to set off a predetermined value of torque, the circuit board triggering the driving device to drive the working portion to stop rotating about the first direction when a value of torque about the first direction received by the circuit board from the torque detecting device reaches the predetermined value of torque.