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2. 发明授权

US5815872A Pressure overload indicator system for power toothbrushes 失效
标题翻译：动力牙刷压力过载指示系统
公开(公告)号：US5815872A
公开(公告)日：1998-10-06
申请号：US907756
申请日：1997-08-08
申请人： Stephen M. Meginniss, III , Kent E. Plant, Jr. , Matthew D. Bixby , David Giuliani
发明人： Stephen M. Meginniss, III , Kent E. Plant, Jr. , Matthew D. Bixby , David Giuliani
IPC分类号： A46B15/00 , A61C17/22 , A46B13/02
CPC分类号： A61C17/225 , A46B15/0002 , A46B15/0012 , A61C17/22 , A61C17/222 , A61C17/3445
摘要： A power toothbrush has a brushhead mounted at one end thereof, the brushhead including a base mounting element for bristles which extend from one surface thereof. Extending from the opposing surface of the base mounting element is a pressure contact member. A substantially rigid brushhead shield extends along and is adjacent to the opposing surface of the brushhead. The brushhead has a hinge-like portion which permits the brushhead to move or swivel in response to pressure being placed on the brushhead, while the brushhead is moving back and forth at its operating frequency of its normal brushing action at over 150 Hz. Thin electrical switch contacts, which are part of an electrical circuit, are positioned on the brush shield, spaced from the contact member on the brushhead. When sufficient pressure is applied against the brushhead, the brushhead moves sufficiently about the hinge, while also continuing to move in normal action that the pressure contact member comes into contact with and then closes the switch contacts, closing the electrical circuit and resulting in a visual indication that the brushhead pressure has exceeded the maximum limit for desirable brushing pressure.
摘要翻译：电动牙刷具有安装在其一端的刷头，所述刷头包括从其一个表面延伸的用于刷毛的基座安装元件。从基座安装件的相对表面延伸的是压力接触件。大致刚性的刷头护罩沿着刷头的相对表面延伸并且与刷头的相对表面相邻。刷头具有铰链状部分，其允许刷头响应于施加在刷头上的压力而移动或旋转，同时刷头在其150Hz以上的正常刷洗动作的操作频率下来回移动。作为电路的一部分的薄电开关触点位于刷屏蔽上，与刷头上的接触构件间隔开。当对刷头施加足够的压力时，刷头围绕铰链充分移动，同时在正常动作中继续移动，使得压力接触构件接触并闭合开关触点，闭合电路并产生视觉指示刷头压力已超过所需刷洗压力的最大极限。

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