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1. 发明授权

US4821009A Overcurrent-protective snap switch for household appliances 失效
标题翻译：家用电器的过电流保护开关
公开(公告)号：US4821009A
公开(公告)日：1989-04-11
申请号：US145269
申请日：1988-01-19
申请人： Rolf Pirdzuns , Wolfgang Polligkeit , Michael Schluckebier
发明人： Rolf Pirdzuns , Wolfgang Polligkeit , Michael Schluckebier
IPC分类号： H01H37/32 , H01H77/04 , H01H61/06 , H01H71/18
CPC分类号： H01H77/04
摘要： The invention is directed to an overcurrent-protective switch for household appliances such as a vacuum cleaner. The snap switch has a housing in which a contact mounting unit is mounted at one end of the housing and contains one of two current terminals of the switch. The other current terminal is mounted at the other end of the housing and is configured to define a contact-engaging surface. A resilient interrupting contact member is fixedly connected to the one current terminal and has a metal center strip by means of which it is held in one of two end positions. In the first end position, the contact member is held in contact engagement with the contact-engaging surface of the other current contact terminal and, in the second end position, it is disengaged from the contact-engaging surface. When the center resistance strip is cool, the contact member is in its first position and the current circuit between the two current terminals is closed. On the other hand, when excessive current passes through the center strip, the latter heats and expands causing the contact member to snap over into the second position to interrupt the current circuit between the two current terminals. A reset plunger returns the contact member to its first position.
摘要翻译：本发明涉及一种家用电器例如真空吸尘器的过电流保护开关。卡扣开关具有壳体，其中触点安装单元安装在壳体的一端并且包含开关的两个电流端子中的一个。另一个电流端子安装在壳体的另一端并构造成限定接触接合表面。弹性中断接触构件固定地连接到一个电流端子并且具有金属中心带，通过该金属中心带将其保持在两个端部位置之一中。在第一端部位置，接触构件与另一个电流接触端子的接触接合表面保持接触接合，并且在第二端部位置中，接触构件与接触接合表面脱离啮合。当中心电阻条冷却时，接触件处于其第一位置，并且两个电流端子之间的电流电路闭合。另一方面，当过大的电流通过中心条时，后者加热和膨胀，导致接触构件卡扣到第二位置以中断两个电流端子之间的电流电路。复位柱塞将接触构件返回到其第一位置。

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