LOW PROFILE MULTI-DIRECTIONAL KEY UNIT STRUCTURE
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United States of America Patent
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Issued Date -
Jul 15, 2010
app pub date -
May 27, 2009
filing date -
Jan 12, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A low profile multi-directional key unit structure is provided, especially for allowing a user to generate various instructions by pushing one single key unit. The key unit structure comprises a magnetic element, a key cap and an elastic member. The magnetic element is fixed to the key cap, and the elastic member is fixed to the key cap, and thereby the movement of the key cap is restricted by the elastic member. The elastic member is a helical spring structure with progressively increasing outwards in diameter from its central area.
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