发明授权
- 专利标题: Double-domed elastomeric keyboard element
- 专利标题(中): 双穹顶弹性键盘元素
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申请号: US296628申请日: 1981-08-27
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公开(公告)号: US4378478A公开(公告)日: 1983-03-29
- 发明人: Reinhard Deeg
- 申请人: Reinhard Deeg
- 申请人地址: NY New York
- 专利权人: International Standard Electric Corporation
- 当前专利权人: International Standard Electric Corporation
- 当前专利权人地址: NY New York
- 优先权: DEX3032557 19800829
- 主分类号: H01H13/52
- IPC分类号: H01H13/52 ; H01H13/702 ; H01H13/70
摘要:
A double-domed elastomeric keyboard element is disclosed in which a solid contact disc is connected to the junction of the domes of the keyboard element housing. The inner dome is provided on its inside with a downwardly extending projection which engages the contact disc when the keyboard element is depressed to press the disc against a pair of conductors on a printed circuit board below the element. Because of the non-positive connection between the key plunger and the conductors, the contact pressure is almost equal to the operating force.
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