A brushhead/handle interface for a power toothbrush

A - Human Necessities – 61 – C

Patent

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Details

A61C 17/22 (2006.01)

Patent

CA 2709756

The brushhead/handle interface includes a brushhead assembly(20) which has a brush member (26) for cleaning teeth. A driveshaft (14) extends from a handle portion (12) of the toothbrush (10), which is driven in an oscillating manner through a selected rotational angle. The driveshaft includes one or more contact regions (49). The coupling member includes an interface portion or portions (46) which are forced against the contact regions of the driveshaft by a single spring member when the driveshaft is inserted into the coupling member. The single spring (34) exerts a sufficient force on the interface portions of the coupling member against the contact regions of the driveshaft to produce both a reliable torque transfer between the driveshaft and the brushhead assembly and to maintain axial retention of the brushhead assembly on the driveshaft during operation of the toothbrush.

La présente invention concerne une interface entre tête et manche de brosse comprenant un ensemble tête de brosse (20) pourvu d'un élément brosse (26) destiné au nettoyage des dents. Un axe d'entraînement (14) sort d'une partie manche (12) de la brosse à dents (10) qui est animée d'un mouvement oscillant utilisant un angle de rotation sélectionné. L'axe d'entraînement comporte une ou plusieurs zones de contact (49). L'élément de couplage comporte une ou plusieurs parties d'interface (46) qui s'appliquent de force contre les zones de contact de l'axe d'entraînement au moyen d'un élément ressort unique lorsque l'axe d'entraînement est inséré dans l'élément de couplage. Le ressort unique (34) exerce sur les parties d'interface de l'élément de couplage une force contre les zones de contact de l'axe d'entraînement, laquelle force suffit, non seulement à produire un transfert de couple fiable entre l'axe d'entraînement et l'ensemble tête de brosse, mais aussi à assurer la retenue axiale de l'ensemble tête de brosse sur l'axe d'entraînement pendant le fonctionnement de la brosse à dents.

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