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公开(公告)号：EP1001716A1
公开(公告)日：2000-05-24
申请号：EP98935838.7
申请日：1998-07-20
申请人： Optiva corporation
CPC分类号： A61C17/225 , A46B15/0002 , A46B15/0012 , A61C17/22 , A61C17/222 , A61C17/3445
摘要： A power toothbrush (10) has a brushhead (13) mounted at one end thereof, the brushhead (13) including a base mounting element (20) for bristles (22) which extend from one surface (43) thereof. Extending from the opposing surface of the base mounting element (20) is a pressure contact member (64). A substantially rigid brushhead shield (32) extends along and is adjacent to the opposing surface of the brushhead (13). The brushhead (13) has a hinge-like portion (28) which permits the brushhead (13) to move or swivel in response to pressure being placed on the brushhead (13), while the brushhead (13) is moving back and forth at its operating frequency of its normal brushing action at over 150 Hz. Thin electrical switch contacts (44), which are part of an electrical circuit (50), are positioned on the brush shield (32), spaced from the contact member (64) on the brushhead (13). When sufficient pressure is applied against the brushhead (13), the brushhead (13) moves sufficiently about the hinge (28), while also continuing to move in normal action that the pressure contact member (64) comes into contact with and then closes the switch contacts (44), closing the electrical circuit (50) and resulting in a visual indication (58, 59) that the brushhead (13) pressure has exceeded the maximum limit for desirable brushing pressure.
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