Connection structure for mounting brush head and handle of electric toothbrush

The embodiment of the utility model relates to a connecting structure for mounting a brush head and a handle of an electric toothbrush. The connecting structure comprises a connecting piece and a metal elastic sheet, an insertion hole is formed in the connector in the axial direction, the connector comprises a base and a column body, the column body comprises a first limiting block and a second limiting block, the first limiting block and the second limiting block are vertically arranged at intervals in the axial direction of the insertion hole, a clamping space penetrating through the column body in the radial direction of the column body is formed between the first limiting block and the second limiting block, and the insertion hole extends into the first limiting block; the metal elastic piece comprises a connecting arm and two elastic arms, the two elastic arms are located on the two opposite sides of the first limiting block and the second limiting block and clamped between the inner wall face of the bru