Keyboard venting |
|||||||
| 申请号 | EP88115128.6 | 申请日 | 1988-09-15 | 公开(公告)号 | EP0322515A3 | 公开(公告)日 | 1990-09-12 |
| 申请人 | Hewlett-Packard Company; | 发明人 | Spreadbury, Brian G.; | ||||
| 摘要 | A keyboard (10) (e.g. for a calculator) is described including a base member having a plurality of channels (14) or a chamber, circuitry defining a plurality of switches (17) in a pattern, and optionally a plurality of domes (24) in registry with the switch sites. When a dome is depressed or deflected downwardly, the air under the dome passes into a channel or a chamber where it is distributed away from the switch site. A vent aperture (14B) communicating between the channel or chamber and the atmosphere may also be included. Membrane switches can also be used in such a keyboard. | ||||||
| 权利要求 | |||||||
| 说明书全文 | |||||||
QQ群二维码
意见反馈
意见反馈