Title:
圧電発電装置
Document Type and Number:
Japanese Patent JP4826660
Kind Code:
B2
Abstract:
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.
More Like This:
Inventors:
Katsumi Fujimoto
Tsuguharu Uebayashi
Tsuguharu Uebayashi
Application Number:
JP2009169914A
Publication Date:
November 30, 2011
Filing Date:
July 21, 2009
Export Citation:
Assignee:
MURATA MANUFACTURING CO.,LTD.
International Classes:
H02N2/00
Domestic Patent References:
| JP2006216578A | ||||
| JP9211151A | ||||
| JP200667643A |
Attorney, Agent or Firm:
宮▲崎▼ 主税
Kazutoshi Nakayama
Kazutoshi Nakayama