| 摘要 |
The brushhead (24) is part of a power toothbrush (10) which includes a handle portion (12) with a drive shaft (14) having a wedge-shaped free end (40) and a circumferential recess (36) in the external surface (35) adapted to receive a portion of a helical spring Member (32). The brushhead includes a hollow neck portion (28) to receive the drive shaft. The hollow part of the neck portion includes a circumferential recess (38) in its interior surface (37) which is in registry with the recess on the drive shaft when the brushhead is operatively positioned on the handle, wherein the hollow portion includes a wedge-shaped recess (44) at the distal end thereof which receives in a mating relationship the wedge-shaped end of the drive shaft.
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