Brushhead/handle interface for a power toothbrush

A brushhead for use with a power toothbrush, comprising:

• a toothbrush member (26);
• a mounting neck (24) on which the toothbrush member is mounted;
• a coupling member (22) separate from the mounting neck, which mates a driveshaft (14) from a motor drive assembly contained within a handle assembly portion (12) of the toothbrush to the mounting neck, including an engagement member on an outer surface of the coupling member and a mating slot on an interior portion of the mounting neck;
• and
• a spring member (34) having a spring action about a longitudinal axis of the coupling member fitted on an extending portion of the coupling member, into which coupling member the driveshaft fits sufficiently tightly, with the force of the spring member, to transfer oscillating action of the driveshaft to the mounting neck, and vice versa, as the brushhead oscillates in response to action of the driveshaft, wherein the spring member contacts and extends around a portion of an exterior surface of the coupling member but does not directly contact the driveshaft.