Typewriting machines – Key-board or key lever-actuating mechanism – Key-cap or key-stem structure
Patent
1998-10-27
2000-02-08
Hilten, John
Typewriting machines
Key-board or key lever-actuating mechanism
Key-cap or key-stem structure
400495, 400496, B41J 508
Patent
active
060221577
ABSTRACT:
The present invention relates to a key structure of a keyboard for easy grease injection. The key structure comprises a top cover installed with a supporting structure, a key cap, and a link bar. The supporting structure comprises two hooks at two sides. Each hook comprises a plate structure on its top portion and a horizontal sliding slot below the plate structure. The key cap comprises two clamps installed on a bottom side of the key cap. The link bar comprises two upper ends installed in the two clamps, and two lower ends installed in the horizontal sliding slots. Each of the plate structures comprises an injection hole. The injection hole is positioned so that grease can be injected into the horizontal sliding slot below the plate structure through the injection hole so as to reduce the friction between one lower end of the link bar and the horizontal sliding slot of the hook when the lower end of the link bar slides in the horizontal sliding slot.
REFERENCES:
patent: 4830526 (1989-05-01), Hosono
patent: 5376765 (1994-12-01), Holmes et al.
patent: 5669723 (1997-09-01), Chang
patent: 5878872 (1999-03-01), Tsai
Darfon Electronics Corp.
Hilten John
Hsu Winston
Sandusky Amanda B.
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