This utility model relates to the field of
curling irons, and more particularly to an adjustment device for an adjustable
curling iron, including an adjustment part comprising a rotating
paddle, a first gear and a second gear, and a driven gear; and a rotating part comprising a positioning plastic, heating wires, a
drive shaft, and a support shaft. This utility model achieves high precision and stability in adjusting the
curling area of the curling iron through precise
gear transmission and axial limiting design. The rotating
paddle, through meshing with the first and second gears, can precisely control the rotation angle of the driven gear, thereby driving the
coordinated movement of the
drive shaft. The first limiting protrusion passes through the first limiting groove and the moving groove, ensuring the movement of the positioning plastic with the heating wire attached when the
drive shaft operates, ensuring precise positioning and smooth movement of the rotating parts, effectively preventing the curling iron from shaking and loosening during use, and allowing for arbitrary adjustment of the size of the curling area formed by each heating wire, improving the accuracy of the curling iron and the user experience.