Pointing unit and improved stylus pen
US5576502A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1995 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Sep 18, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/03545
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a pointing unit adapted for a stylus pen associated with a coordinate data input device which has been commonly used as one of some input devices for a computer system. This pointing unit comprises a casing formed in a substantially cylindrical shape; a support member installed in the interior of the casing, the support member being limited to move in the reverse direction of one end opening of the casing; a cap member formed in the same cylindrical shape as the casing, the external diameter of the cap member being slightly smaller than the internal diameter of the casing, one end of the cap member being formed in a dome shape and arranged close to the end opening so as to protrude a predetermined length of the dome shape end from the end opening of the casing, the cap member being limited to move in the outward direction and on the contrary freely sliding in the inward direction; a core member made of magnetic material arranged close to the inner surface of the dome shape end of the cap member; a coil member made of magnetic material, interposed between the core member and the support member; and an elastic member arranged in a narrow space defined between…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.