Keyboard in which metal plates of varying thickness may be installed

The present invention provides a keyboard comprising a cover plate, a base plate, a metal support, and a thin layer membrane. The cover plate comprises a plurality of supporting structures with a plurality of key caps installed on top and is movable in an up-down vertical direction. The thin layer m...

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Bibliographic Details
Main Author CHAO; SHIH-HUNG
Format Patent
LanguageEnglish
Published 02.05.2000
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
ELECTRIC SWITCHES
ELECTRICITY
EMERGENCY PROTECTIVE DEVICES
PHYSICS
RELAYS
SELECTORS
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Summary:The present invention provides a keyboard comprising a cover plate, a base plate, a metal support, and a thin layer membrane. The cover plate comprises a plurality of supporting structures with a plurality of key caps installed on top and is movable in an up-down vertical direction. The thin layer membrane installed below the cover plate comprises a plurality of switches with each switch underlying a key cap for detecting the operation of the plurality of key caps. The metal support installed under the thin layer membrane strengthens the structure of the keyboard. The base plate is installed under the metal support and comprises a plurality of protruding columns of varying heights to accommodate different metal supports of varying thickness. By supporting the metal support of a specific thickness, the protruding columns of corresponding height help to maintain the thin layer membrane at the specified height between the cover plate and the base plate.
Bibliography:Application Number: US19980222289