Multi-directional input key and key input device

Computer graphics processing and selective visual display system – Display peripheral interface input device – Including keyboard

Reexamination Certificate

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Details

C345S168000

Reexamination Certificate

active

07053885

ABSTRACT:
Disclosed are a multi-directional input key and a key input device helping to suppress erroneous input through the input key and providing a satisfactory operability. The multi-directional input key has an operation portion, on which are formed rectifying protrusions adapted to come into contact with the circuit board before the board contacts are brought into conduction upon tilting the operation portion to thereby rectify the tilting attitude of the operation portion toward the normal tilting direction. Even when the key top is tilted in an oblique direction deviated from the normal tilting direction, the rectifying protrusions come into contact with the upper surface of the printed circuit board before the board contacts are brought into conduction to thereby rectify the tilting direction of the key top to the normal tilting direction.

REFERENCES:
patent: 5340953 (1994-08-01), Krebs et al.
patent: 6586689 (2003-07-01), Kuriyama
patent: 6653579 (2003-11-01), Inoue et al.
patent: 2001/0023816 (2001-09-01), Furiyama
patent: 2003/0160761 (2003-08-01), Wu
patent: 0 905 599 (1999-03-01), None
patent: 1 168 393 (2002-01-01), None
patent: 1 168 393 (2002-01-01), None
patent: 0 905 599 (1999-03-01), None
European Search Report dated Aug. 11, 2003.
Chinese Office Action completed on Dec. 7, 2004.

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