US4580018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switch device
Assignee: Alps Alpine Co Ltd
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Filing: 1984-10-01
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Granted: 1986-04-01
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Expires: 2004-10-01
Abstract
Abstract A switch device comprises a chassis with a number of key-tops, a switch unit, and a support board, piled up in that order and coupled at their centers by one screw. Plural screws pass through elongated screw holes bored in the support board and oriented radially around the center and are threaded to bosses of the chassis. The bosses pass loosely thru-holes bored in the switch unit.
Inventors
- 👤 Fumiharu Yoshihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:13
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/702; H01H2221/00; H01H2221/002; H01H2223/00; H01H2223/034; H01H2229/00; H01H2229/024; H01H2229/032; H01H2229/034; H01H2239/00; H01H2239/034
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A switch device including a display board provided with a plurality of key-tops arranged thereon, a switch unit arranged below said display board having an upper electrode layer, an insulting spacer layer with a plurality of contact-forming holes therein, and a lower electrode layer, forming a plurality of switch elements arranged correspondingly with said key-tops, and a support board below said switch unit, wherein the improvement comprises: said display board having downwardly extending therefrom a center mounting portion located in the center thereof and a plurality of screw mounting portions which are aligned radially from said center mounting portion, said switch unit having a corresponding center mounting and screw mounting thru-holes, and said support board having a plurality of corresponding center mounting and screw mounting holes, for assembling said display board, switch unit, and support board together in the described order, and further wherein said thru-holes of said switch unit are enlarged compared to said screw mounting portions such that the latter are passed therethrough with a clearance to accommodate any thermal expansion.
Claim 2
Dependent Claim
173 words
A switch device including a display board provided with a plurality of key-tops arranged thereon, a switch unit arranged below said display board having an upper electrode layer, an insulting spacer layer with a plurality of contact-forming holes therein, and a lower electrode layer, forming a plurality of switch elements arranged correspondingly with said key-tops, and a support board below said switch unit, wherein the improvement comprises: said display board having downwardly extending therefrom a center mounting portion located in the center thereof and a plurality of screw mounting portions which are aligned radially from said center mounting portion, said switch unit having a corresponding center mounting and screw mounting thru-holes, and said support board having a plurality of corresponding center mounting and screw mounting holes, for assembling said display board, switch unit, and support board together in the described order, and further wherein said thru-holes of said switch unit are enlarged compared to said screw mounting portions such that the latter are passed therethrough with a clearance to accommodate any thermal expansion.
Claim 3
Dependent Claim
33 words
The switch device described in claim 1 wherein said key-tops are formed integrally on a flexible rubber sheet and said display board has a plurality of corresponding openings for extending said key-tops therethrough.
Claim 4
Dependent Claim
35 words
A switch device as set forth in claim 1, wherein said switch unit and said support board are formed with grooves, said display board is provided with positioning pins corresponding in position to said grooves,
Claim 5
Dependent Claim
29 words
1 whereby positioning of said, display board said switch unit and said support board in assembling them is smoothly performed by means of said grooves and said positioning pins.
Claim 6
Dependent Claim
29 words
1 whereby positioning of said, display board said switch unit and said support board in assembling them is smoothly performed by means of said grooves and said positioning pins.
Claim 7
Dependent Claim
21 words
A switch device as set forth in claim 1, wherein said screw mounting portions are bosses formed integrally on said chassis.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-31 | 1989-09-30 | 1990-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-31 | 1993-09-30 | 1994-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-31 | 1997-09-30 | 1998-04-01 | $7700.00 | Window Closed / Lapsed |