Clamping structure for connection between dilator and handle

A clamping structure for connection between an expander and a handle comprises a connecting sleeve integrally connected with the expander and a connecting portion arranged at one end of the handle, the connecting sleeve is sleeved on the peripheral side of the connecting portion, the other end of the handle is provided with an operation face, the handle is provided with a protrusion between the operation face and the connecting portion, the protrusion is provided with a groove, and the groove is provided with a groove. The protrusion is provided with a blocking part at the position of the side edge of the groove, the blocking part is bent towards the center of the groove, the connecting sleeve extends outwards in the groove to form an elastic arm, the outer end portion, penetrating through the blocking part, of the elastic arm is provided with a clamping hook capable of being connected with the blocking part in a clamped mode, and the distance between the blocking part and the bottom face of the groove is lar