发明授权
- 专利标题： Apparatus for enabling a keypad in response to antenna extension
- 专利标题（中）： 用于响应于天线延伸而启用小键盘的装置
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申请号： US773438申请日： 1996-12-27
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公开(公告)号： US5987311A公开(公告)日： 1999-11-16
- 发明人: John Charles Phillips
- 申请人： John Charles Phillips
- 申请人地址： NC Research Triangle Park
- 专利权人： Ericsson Inc.
- 当前专利权人： Ericsson Inc.
- 当前专利权人地址： NC Research Triangle Park
- 主分类号： H04B1/38
- IPC分类号： H04B1/38 ; H04M1/02 ; H04M1/67
摘要：
An antenna switch is provided on a portable telecommunication instrument, such as a cellular telephone, to enable operation of the keypad of the instrument when the antenna is extended. In one arrangement, an antenna switch comprises a pair of antenna position sensing contacts disposed on a printed circuit board at a position where electrical continuity is established between the contacts by an electrically conductive member on the antenna when the antenna is in an extended position. The present invention solves the problem of inadvertent activation of the instrument when the antenna is retracted. Thus, the instrument does not require a closeable cover over the keypad to prevent inadvertent actuation of the instrument.
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