CLEANING HEAD FOR ELECTRIC TOOTHBRUSH WITH HANDLE WITH HELP OF SPRING WEDGE Russian patent published in 2016 - IPC A61C17/26 

FIELD: medicine; items for personal usage.

SUBSTANCE: invention relates to medical equipment, in particular, hygiene, and is intended for teeth cleaning. Electric toothbrush comprises a handle portion, a cleaning head and spring element. Handle portion has a drive unit with a wedge-like free end extending from drive shaft. Drive shaft comprises a circular recess on its outer surface. Cleaning head has a cleaning element for teeth cleaning and a contracted portion on distal end of which there is a cleaning element. Contracted portion is hollow on portion of its length from its proximal end, is designed for enclosing drive shaft from handle, includes a peripheral circular recess on its inner surface of hollow portion, which is aligned with recess in drive shaft, when cleaning head is arranged in working position on handle. Hollow part of narrow portion includes a mating wedge-shaped recess at its distal end to hold wedge free end of drive shaft to make sufficiently tight interaction of torque transfer between drive shaft and cleaning head. Spring element is inserted into circular cavity and peripheral groove, which are superposed when cleaning head is arranged in working position on handle, which provides strong axial retention of cleaning head on drive shaft.

EFFECT: invention ensures strong connection between drive shaft and a cleaning head by means of reliable axial force, as well as efficient transmission of torque.

6 cl, 4 dwg