PORTABLE COMMUNICATION EQUIPMENT

PROBLEM TO BE SOLVED: To provide portable communication equipment the size and weight of which are reduced without increasing the number of parts and capable of protecting a casing and electronic parts from an impact and outside pressure, etc. SOLUTION: A key sheet 10 on which a plurality of key par...

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Bibliographic Details
Main Author WATANABE YASUSUKE
Format Patent
LanguageEnglish
Published 29.11.2002
Edition7
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TELEPHONIC COMMUNICATION
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Summary:PROBLEM TO BE SOLVED: To provide portable communication equipment the size and weight of which are reduced without increasing the number of parts and capable of protecting a casing and electronic parts from an impact and outside pressure, etc. SOLUTION: A key sheet 10 on which a plurality of key parts 13 are formed, a metal dome sheet 11 and a printed board 12 are embedded in a lower casing 3 having an upper case 3a and a lower case 3b in a laminated state. A plurality of projections 14 to support the upper case 3a from the inside are formed on the key sheet 10. Deformation or curve of the upper case 3a is prevented and depression of the key part 13 is prevented by the upper case 3a by supporting the upper case 3a by a plurality of projections 14 when the outside pressure is applied to the upper case 3a.
Bibliography:Application Number: JP20010142635