US4430595A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezo-electric push button switch
Assignee: Toko Inc
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Filing: 1982-08-04
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Granted: 1984-02-07
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Expires: 2002-08-04
Abstract
Abstract In a piezo-electric push button switch, a flexible printed circuit board is secured to terminals which are embedded in the housing, and the piezo-electric plate is supported by the flexible printed circuit board in such a manner that it is floated from the housing, whereby external impact or vibration is decreased, and in which an integrated circuit consisting of a resistor and a capacitor is incorporated in the switch body, to eliminate harmonics.
Inventors
- 👤 Hiroyuki Nakasone
- 👤 Takayasu Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:44
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/94; H03K17/96; H03K17/964; H03K17/965; H10; H10N; H10N30/00; H10N30/80; H10N30/87; H10N30/875; H03K2217/00; H03K2217/94; H03K2217/96; H03K2217/96015; H03K2217/96027
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
198 words
A piezo-electric push button switch comprising: a housing having a plurality of terminals embedded therein; a depressing member which is movably mounted in said housing; a flexible printed circuit board in said housing which electrically is conductively secured to said terminals for being mounted thereon; an electrically conductive plate in said housing between said circuit board and said depressing member and having a plate part and a lead part, said lead part being electrically conductively secured to said flexible printed circuit board; a piezo-electric plate which has electrodes on both surfaces thereof and is polarized in the direction of the thickness thereof, said piezo-electric plate being fixedly secured to the surface of said electrically conductive plate which is toward said circuit board; a further lead part between said flexible printed circuit board and said electrode on said piezo-electric plate which is toward said flexible circuit board and mechanically and electrically conductively connecting said electrode and said circuit board; and striking means constituted by a dome-shaped metal spring and interposed between said depressing member and said electrically conductive plate and which is deformed by depression of said depressing member to thereby strike a blow on said electrically conductive plate.
Claim 2
Dependent Claim
198 words
A piezo-electric push button switch comprising: a housing having a plurality of terminals embedded therein; a depressing member which is movably mounted in said housing; a flexible printed circuit board in said housing which electrically is conductively secured to said terminals for being mounted thereon; an electrically conductive plate in said housing between said circuit board and said depressing member and having a plate part and a lead part, said lead part being electrically conductively secured to said flexible printed circuit board; a piezo-electric plate which has electrodes on both surfaces thereof and is polarized in the direction of the thickness thereof, said piezo-electric plate being fixedly secured to the surface of said electrically conductive plate which is toward said circuit board; a further lead part between said flexible printed circuit board and said electrode on said piezo-electric plate which is toward said flexible circuit board and mechanically and electrically conductively connecting said electrode and said circuit board; and striking means constituted by a dome-shaped metal spring and interposed between said depressing member and said electrically conductive plate and which is deformed by depression of said depressing member to thereby strike a blow on said electrically conductive plate.
Claim 3
Dependent Claim
39 words
A piezo-electric push button switch as claimed in claim 1 in which said further lead part is a protruding piece on said circuit board and secured to said electrode of said piezo-electric plate which is toward said circuit board.
Claim 4
Dependent Claim
26 words
A piezo-electric push button switch as claimed in claim 2, further comprising a chip-shaped resistor and/or a chip-shaped capacitor is connected to said printed circuit board.
Claim 5
Dependent Claim
27 words
A piezo-electric push button switch as claimed in claim 3, in which said resistor and said capacitor connected to said printed circuit board form an integrated circuit.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |