Toothbrush

A toothbrush, comprising:

• a brush head linkage, a connecting mechanism and a toothbrush handle which are sequentially arranged from top to bottom, and a brushing structure for brushing teeth is connected to the brush head linkage;
• the connecting mechanism comprises a first connector, a second connector and an elastic structural element connected to the second connector;
• one of the first connector and the second connector is connected to the toothbrush handle, and the other one is connected to the brush head linkage;
• the first connector is rotatably connected to the second connector, and the axis of rotation is an oscillating reference line perpendicular to a vertical direction;
• the elastic structural element comprises at least one return torsion spring, the at least one return torsion spring comprises a helix spring in a cylindrical form with an opening of the cylinder oriented in a direction parallel to an extension direction of the oscillating reference line, the helix spring is in stop fit with the second connector in a direction perpendicular to the oscillating reference line, and the at least one return torsion spring further comprises a first torsion bar and a second torsion bar respectively connected to a front end and a rear end of the helix spring;
• and a free end of the first torsion bar is in stop fit with the first connector, and a free end of the second torsion bar is in stop fit with the second connector.