US Patent 11071613 Structure for coupling toothbrush head to electric toothbrush handle

This document also discloses a coupling member for mounting a toothbrush head to an electric toothbrush includes a base having a first end with an opening for receiving a drive shaft of an electric toothbrush, and a coupling section that extends from a second end of the base. The coupling section includes a cylindrical sidewall that surrounds a cavity for receiving the drive shaft, an aperture in the cylindrical sidewall that provides an opening to the cavity, and a resilient spring member that is sized to be positioned within the aperture and touch the drive shaft while being held by the aperture. This document also discloses a brush head incorporating such a coupling member, and an electric toothbrush to which such a brush head is attached.