DEVICE FOR INTERFACING ELECTRIC TOOTHBRUSH HEAD AND HANDLE Russian patent published in 2013 - IPC A61C17/22 

FIELD: personal use articles.

SUBSTANCE: invention relates to the field of oral hygiene and can be used for tooth brushing. The device for interfacing an electric toothbrush head and handle (10) contains the brush head unit (20), a drive shaft (14), a connective element (22) and a spring element (34). The brush head unit (20) contains a brush element (26) for cleaning teeth at one end. The drive shaft (14) passes from the toothbrush handle and is actuated so that to oscillate at a specific rotation angle. The drive shaft contains one or more contact sections (49) whereon interfacing surfaces (50) are located. The connective element (22) is positioned at the other end of the brush head unit for the drive shaft placement. The connective element includes one or more interfacing sections (46) that physically contact the said interfacing surfaces of the drive shaft when the drive shaft is introduced into the connective element. The spring element (34) is positioned round a part of the body (40) so that to apply a sufficiently great force to the connective element for physical contact between the said interfacing section(s) of the connective element and the said interfacing section(s) of the drive shaft to be sufficient to ensure the physical contact between the said interfacing section(s) of the connective element and the said interfacing section(s) of the drive shaft that is sufficient for the brush head unit to be retained on the drive shaft during the toothbrush operation, at the same time enabling the user to remove the brush head unit from the drive shaft while the brush is out of operation.

EFFECT: reliably ensuring the functions of torque transmission and retention in the axial direction with multiply repeated replacements of the brush head unit from the drive shaft.

13 cl, 13 dwg