Electric toothbrushes

A - Human Necessities – 61 – C

Patent

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Details

A61C 17/26 (2006.01) A61C 17/16 (2006.01) A61C 17/34 (2006.01)

Patent

CA 2221545

An electric toothbrush has an elongate shank 11 and a drive shaft formed in two sections 16 and 17. The sections are drivingly coupled together by a coil spring 24. The shank 11 is formed in two sections 21 and 22 joined together by a flexible ribbed seal 23. The shank is therefore able to flex while the drive shaft continues to run normally without adding strain to the electric motor which would amongst other things increase electric power required. Rigid bars 25 restrict the flexibility of the shank parts into one plane.

L'invention concerne une brosse à dents électrique comprenant un fût allongé 11 et un arbre d'entraînement formé de deux sections 16 et 17. Les sections sont entraînées ensemble par un ressort hélicoïdal 24. Le fût 11 est formé de deux sections 21 et 22 reliées l'une à l'autre par un joint cannelé souple 23. Le fût peut donc se plier alors que l'arbre d'entraînement continue de tourner normalement sans ajouter de contrainte au moteur électrique, ce qui ferait notamment augmenter la consommation d'électricité. Des barres rigides 25 restreignent la flexibilité des parties du fût à un plan.

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