| 摘要 |
THERE IS DISCLOSED A PIVOT JOINTED TOOTH BRUSH HEAD COMPRISING A BRUSH HEAD (1) BEING PIVOT BALL JOINTED (2) TO THE BRUSH NECK (3) AND HENCE THE BRUSH HANDLE (4) TO ALLOW THE BRUSH HEAD (1) FREE MOVEMENTS SO THAT IT IS ALWAYS VERTICAL TO THE TEETH NO MATTER AT WHAT POSITIONS. THE PIVOTED BALL JOINTS (2), CAN BE REPLACED WITH A BICUSPID FULCRUM (5) OR A DOUBLE BALL JOINTS (6) TO ALLOW FREE MOVEMENTS OF THE BRUSH HEAD (1) AND BE VERTICAL TO THE TEETH AT ALL TIME DURING BRUSHING.
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