Coordinate input device having strain gauges capable of being surface-mounted without flux cleaning
AssigneeAlps Electric Co., Ltd.
InventorsShinji Hirano, Junichi Inamura
Life of this patent
Estimating the term…
Abstract
A coordinate input device includes a flat substrate portion, a plurality of strain gauges formed on one surface of the substrate portion, an operating portion disposed at about the center of the other surface of the substrate portion, and a printed board on which one surface of the substrate portion is mounted. Since a portion of the printed board opposing the strain gauges has a through hole, it is thereby opened. Therefore, even when the substrate portion is bent by tilting the operating portion, the strain gauges will not touch the printed board. Accordingly, it is possible to omit flux cleaning, to shorten the assembly time, and to reduce the cost.
Claims9
A coordinate input device comprising:
- a flat substrate portion;
- a plurality of stain gauges formed on one surface of said substrate portion;
- a columnar operating portion disposed on the other surface of said substrate portion;
- and
- a printed board on which said one surface of said substrate portion is mounted,
- wherein a through hole is formed through a portion of said printed board opposing said strain gauges.
A coordinate input device comprising:
- a flat substrate portion;
- plurality of stain gauges formed on one surface of said substrate portion;
- a columnar operating portion disposed on the other surface of said substrate portion;
- and
- a printed board on which said one surface of said substrate portion is mounted,
- wherein a counterbore having a predetermined depth is formed in a portion of said substrate portion on which said strain gauges are formed or/and a portion of said printed board opposing said strain gauges.
A coordinate input device comprising:
- a flat substrate portion;
- plurality of stain gauges formed on one surface of said substrate portion;
- a columnar operating portion disposed on the other surface of said substrate portion;
- and
- a printed board to which said one surface of said substrate portion is soldered,
- wherein a plurality of wiring patterns and a resist film for covering said wiring patterns are formed on the surface of a base of said printed board, and portions of said base opposing said strain gauges are exposed without forming said wiring patterns and said resist film thereon.
Dependencies are inferred from the claim text.