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1. 发明授权

US4712092A Parallel encoded piezoelectric keyboard switch and array 失效
标题翻译：并行编码压电键盘开关和阵列
公开(公告)号：US4712092A
公开(公告)日：1987-12-08
申请号：US563525
申请日：1983-12-20
申请人： Austin Boldridge, Jr. , Scott Buell , James M. Graham
发明人： Austin Boldridge, Jr. , Scott Buell , James M. Graham
IPC分类号： H01H13/70 , H01L41/113 , H03K17/96 , H03M11/22 , G06F3/02
CPC分类号： H03M11/22 , H01H13/70 , H03K17/9643 , H03K2217/96027
摘要： A keyboard switch includes a plurality of spaced piezoelectric transducers secured to a common strike plate which is selectively impacted to actuate all of the transducers in response to switch actuation. The switch includes a snap action spring member carrying an impact member which impacts the strike plate as the spring member snaps to its actuated state when the switch is depressed . The spring member causes the impact member to maintain a compressive force against the strike plate, maintaining the transducers actuated while the key remains depressed and for a short interval after the key is released. An array of such switches on a keyboard is disposed over a plurality of parallel data lines which electrically contact one or more transducers at each switch in accordance with a switch indentification code. The parallel binary number appearing on the lines is received by processing circuitry which identifies each depressed key by its code. By maintaining compressive forces on the transducers, the system facilitates character processing and generation of certain specialized character functions.
摘要翻译：键盘开关包括固定到公共撞击板的多个间隔开的压电换能器，其被选择性地撞击以响应于开关致动来致动所有换能器。该开关包括一个卡扣动作弹簧构件，该弹簧构件承受冲击构件，当冲击开关被按压时，该冲击构件随着弹簧构件卡入其致动状态而撞击冲击板。弹簧构件使冲击构件保持抵抗撞击板的压缩力，当钥匙保持按压时，保持换能器的作用并且在钥匙被释放之后的短时间间隔内。键盘上的这种开关的阵列设置在多个并行数据线上，该数据线根据开关识别码在每个开关处电接触一个或多个换能器。出现在行上的并行二进制数由通过其代码识别每个按下的键的处理电路接收。通过保持换能器上的压缩力，系统便于字符处理和产生某些专门的字符功能。

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