发明名称 |
Electronic calculator with no protruding key tops |
摘要 |
The body of an electronic calculator comprising a keyboard, an arithmetic processor unit, a power supply and a digital display is accommodated within a casing at least a portion of which corresponding to the keyboard is made of a single flexible flat sheet such as cloth and leather. A plurality of limited regions of the flat sheet are given unique symbols and indicators corresponding to respective ones of keys of the keyboard by a printing technique for example, whereby the flexible flat sheet serving as manually operable key tops or actuators. When depressing a specific limited region of the key flat sheet, its associated elastomeric connector comes into contact with a comb shaped counter connector contact formed on a printed circuit board. Such an arrangement provides a keyboard with no protruding key tops for a totally new dimension in slimness and portability of calculators.
|
申请公布号 |
US4158230(A) |
申请公布日期 |
1979.06.12 |
申请号 |
US19770843047 |
申请日期 |
1977.10.17 |
申请人 |
SHARP K K |
发明人 |
HASHIMOTO, SADAKATSU;HASHIMOTO, SHINTARO;KOMAKI, SHIGEKI;WASHIZUKA, ISAMU |
分类号 |
G06F15/02;H01H13/702;H01H13/785;(IPC1-7):G06F15/02;H01H9/00 |
主分类号 |
G06F15/02 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|