Power generating element
First Claim
1. A power generating element which generates electric power by converting vibration energy into electric energy, the power generating element, comprising:
- a plate-like bridge portion which extends along a first longitudinal direction axis and has flexibility;
a pedestal which supports and fixes a base end of the plate-like bridge portion;
a weight body which is directly or indirectly connected to a leading end of the plate-like bridge portion;
a piezoelectric element which is fixed at a predetermined position on a surface of the plate-like bridge portion at which expansion/contraction deformation occurs; and
a power generating circuit which rectifies electric current produced on the basis of charge generated at the piezoelectric element and takes out electric power;
whereinthe weight body is provided with a left-hand side weight body portion which is positioned on a left hand side of the plate-like bridge portion in relation to the longitudinal direction axis and a right-hand side weight body portion which is positioned on a right hand side of the plate-like bridge portion in relation to the longitudinal direction axis.
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Accused Products
Abstract
There is provided a power generating element which is capable of converting vibration energy in various directions into electric energy without waste and less likely to be damaged even upon application of excessive vibration. Made available is a main generating structure (MGS) in which a first layer (100), a second layer (200) and a third layer (300) are laminated. The second layer (200) has a plate-like bridge portion (210), a central plate-like portion (220), a left-hand side plate-like portion (230) and a right-hand side plate-like portion (240), each of which is flexible, and the third layer (300), that is a weight body, formed in the “U” letter shape is joined with the lower surface thereof. The plate-like bridge portion (210) is protected by the weight body (300) circumference thereof. The first layer (100) is structured so that a piezoelectric material layer (105) is laminated on an upper surface of a lower layer electrode (E0), and four localized upper layer electrodes (E1 to E4) are laminated on the upper surface thereof. The base end of the plate-like bridge portion (210) is fixed to a pedestal (400). Vibration of the weight body (300) is efficiently transmitted to the plate-like bridge portion (210) and the bridge portion piezoelectric layer (110), and a power generating circuit (500) outputs electric power on the basis of charge generated at the lower layer electrode (E0) and the upper layer electrodes (E1 to E4).
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Citations
31 Claims
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1. A power generating element which generates electric power by converting vibration energy into electric energy, the power generating element, comprising:
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a plate-like bridge portion which extends along a first longitudinal direction axis and has flexibility; a pedestal which supports and fixes a base end of the plate-like bridge portion; a weight body which is directly or indirectly connected to a leading end of the plate-like bridge portion; a piezoelectric element which is fixed at a predetermined position on a surface of the plate-like bridge portion at which expansion/contraction deformation occurs; and a power generating circuit which rectifies electric current produced on the basis of charge generated at the piezoelectric element and takes out electric power;
whereinthe weight body is provided with a left-hand side weight body portion which is positioned on a left hand side of the plate-like bridge portion in relation to the longitudinal direction axis and a right-hand side weight body portion which is positioned on a right hand side of the plate-like bridge portion in relation to the longitudinal direction axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 31)
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12. A power generating element which generates electric power by converting vibration energy in a direction of each coordinate axis in an XYZ three-dimensional coordinate system into electric energy, the power generating element, comprising:
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a main generating structure in which a main generating first layer, a main generating second layer and a main generating third layer are laminated sequentially from above where an XY plane is placed on a horizontal surface, a positive direction of a Z-axis is placed in an upward direction and a negative direction of the Z-axis is placed in a downward direction; a pedestal which supports and fixes a predetermined site of the main generating structure; and a power generating circuit which rectifies electric current produced on the basis of charge generated by the main generating structure and takes out electric power;
whereinthe main generating second layer is a flat-plate like layer arranged along a surface parallel to the XY plane and provided with a plate-like bridge portion which is arranged on a Y-axis and has flexibility and a weight body supporting portion which supports the main generating third layer; the weight body supporting portion is provided with a central plate-like portion which is arranged on an X′
-axis which is an axis orthogonal to the Y-axis and parallel to an X-axis;the plate-like bridge portion extends from a base end to a leading end along the Y-axis, the central plate-like portion extends along the X′
-axis so as to intersect with the Y-axis, the leading end of the plate-like bridge portion is connected to a vicinity of a part intersecting with the Y-axis of the central plate-like portion, and a projection image of the plate-like bridge portion and the central plate-like portion on the XY plane assumes a “
T”
letter shape;the main generating first layer is provided with a piezoelectric element which is formed so as to cover at least a part of an upper surface of the plate-like bridge portion of the main generating second layer; the main generating third layer is connected to a lower surface of the weight body supporting portion of the main generating second layer, performing a function as a weight body having sufficient mass which causes deflection at the plate-like bridge portion on the basis of applied acceleration; when both sides of the plate-like bridge portion are defined in such a manner that a side in which an X coordinate value is negative is defined as a left hand side, and a side in which an X coordinate value is positive is defined as a right hand side, the main generating third layer is provided with a left-hand side weight body portion positioned on the left hand side of the plate-like bridge portion and a right-hand side weight body portion positioned on the right hand side thereof; the pedestal supports and fixes the base end of the plate-like bridge portion; and the power generating circuit is a circuit which rectifies electric current produced on the basis of charge generated at the piezoelectric element and takes out electric power. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification