Coupling mechanism for electric toothbrush

A coupling mechanism for an electric toothbrush comprising a handle and a replaceable refill having a longitudinal axis, the coupling mechanism comprising a handle coupling portion and a refill coupling portion structured and configured to engage one another thereby providing a secure connection between the handle and the refill;

• wherein the handle coupling portion comprises a coupling stem extending in a direction substantially parallel to the longitudinal axis at a first end of the handle and a coupling pin made of a hard-plastic material and protruding from the stem in a direction not parallel to the longitudinal axis, the coupling stem having outer walls terminating at a free end thereof;
• wherein the refill coupling portion comprises a generally tubular structure having refill walls defining an interior space therebetween structured and configured to receive therein the coupling stem of the handle coupling portion, and a pair of mutually opposite cantilevered arms disposed in the interior space, wherein each of the arms extends and curves around the longitudinal axis in a plane substantially perpendicular thereto, is resiliently deformable, and terminates with a coupling surface structured and configured to engage the coupling pin of the handle coupling portion for secure and disengageable connection therewith.