A small-sized piezoelectric power generation device is provided which can generate electric power even with vibrations at low frequencies. The piezoelectric power generation device includes a piezoelectric element formed in a spiral shape and having a center-side end fixed to a first fixing member and an outer-side end fixed to a second fixing member. The piezoelectric element includes a first piezoelectric body formed in a spiral shape and polarized in a radial direction of the piezoelectric element from one side toward the other side. The first and second fixing members are arranged such that the second fixing member is displaceable relative to the first fixing member in a tangential direction x, whereas the second fixing member is restricted from displacing relative to the first fixing member in a perpendicular direction y.

Claims

5 · 1 independent · depth 3

5 granted claims

›1.independentA piezoelectric power generation device comprising:na spiral-shaped piezoelectric element having a center-side end and an outer-side end;a first fixin…+4

›2.↳ 1The piezoelectric power generation device according to claim 1, wherein the spiral-shaped member is a second piezoelectric body which is polarized in …d2

›3.↳ 1The piezoelectric power generation device according to claim 1, wherein the spiral-shaped member is an elastic body.d2

›4.↳ 1The piezoelectric power generation device according to claim 1, wherein the first fixing member includes a plate-like member having one surface on whi…d2+1

Classifications

3 codes

IPC · International Patent Classification

Section H — Electricity

H01L41/113

USPC · US Patent Classification

310/339310/367

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Pendency

2.1 y

768 days filing → grant

Office actions

after a restriction

Responses

1 RCE

Examiner

Derek Rosenau

art unit 2837 · TC 2800

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Citations: 4 back · 0 forward

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1 priority documents

›Priority documents — 1

Type	Document	Date
related publication	US 20110018397 A1	27 Jan 2011

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