US4072004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching construction for a handy electronic device
Assignee: Seiko Instruments Inc
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Filing: 1976-02-11
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Granted: 1978-02-07
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Expires: 1996-02-11
Abstract
Abstract An electronic timepiece comprises a digital display device and electronic circuitry including a printed circuit board containing thereon a pattern of printed conductors connected to drive the digital display device. A cover member is disposed atop the timepiece casing and on a side portion of the cover member are mounted a plurality of depressable key switches, the key switches being mounted at a location overlying and spaced from the pattern of printed conductors. An electro-conductive rubber sheetlike member coacts with the cover member for both sealing in a water proof manner the region between the cover member and the timepiece casing and effecting electrical connection between individual ones of the key switches and the pattern of printed conductors in response to depression or actuation of the key switches.
Inventors
- 👤 Kojiro Tanaka
- 👤 Kenjiro Yagi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:17
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/001; G04C3/005; G04G; G04G9/00; G04G9/0064; G04G9/007; H; H01; H01H; H01H13/00; H01H13/70; H01H13/84
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
In an electronic timepiece of the type having a digital display device, and electronic circuitry including a printed circuit board having a pattern of printed conductors thereon connected to drive said digital display device: a timepiece casing having said digital display device and electronic circuitry mounted therein; a cover member disposed atop and connected to said timepiece casing; a plurality of depressable key switches mounted on a portion of said cover member at a location overlying and spaced from said pattern of printed conductors; and means coacting with said cover member for both sealing in a water proof manner the region between the cover member interior and the timepiece casing interior and effecting electrical connection between individual ones of said key switches and said pattern of printed conductors when said key switches are depressed.
Claim 2
Dependent Claim
134 words
In an electronic timepiece of the type having a digital display device, and electronic circuitry including a printed circuit board having a pattern of printed conductors thereon connected to drive said digital display device: a timepiece casing having said digital display device and electronic circuitry mounted therein; a cover member disposed atop and connected to said timepiece casing; a plurality of depressable key switches mounted on a portion of said cover member at a location overlying and spaced from said pattern of printed conductors; and means coacting with said cover member for both sealing in a water proof manner the region between the cover member interior and the timepiece casing interior and effecting electrical connection between individual ones of said key switches and said pattern of printed conductors when said key switches are depressed.
Claim 3
Dependent Claim
57 words
An electronic timepiece according to claim 1; wherein said means comprises a flexible electro-conductive rubber member interposed between said portion of said cover member and said printed circuit board and being spaced from said printed conductors so that depression of said key switches effects resilient flexing of said electro-conductive rubber member into contact with said printed conductors.
Claim 4
Dependent Claim
35 words
An electronic timepiece according to claim 2; wherein said cover member includes projecting portions engaging with and pressing said electro-conductive rubber member into engagement with said printed circuit board to form said water proof seal.
Claim 5
Dependent Claim
66 words
An electronic timepiece according to claim 3; further including an electrically insulative member sandwiched between said electro-conductive rubber member and said printed circuit board thereby maintaining said rubber member spaced from said printed conductors and having holes therein at locations aligned with said key switches to enable flexing of said rubber member into contact with said printed conductors in response to depression of said key switches.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-06 | 1981-08-08 | 1982-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-06 | 1985-08-08 | 1986-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-06 | 1989-08-08 | 1990-02-07 | $7700.00 | Window Closed / Lapsed |