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AssigneeCanon Kabushiki Kaisha
InventorYutaka Maruyama
Estimating the term…
The present invention is to provide a stacked type electro-mechanical energy conversion element comprising a stack of superimposed layers with an electro-mechanical energy conversion function having an electrode film formed on a superimposed surface so as to improve the driving efficiency thereof. A part of the electrode film is connected to an electrode film formed on an edge portion of a layer, and on a side face of the stacked electro-mechanical energy conversion element, there are provided a connection terminal connectable to an external power supply, and a wiring portion connecting the connection terminal to the electrode film formed on the edge portion of the layer.
A stacked type electro-mechanical energy conversion element comprising:
A stacked type electro-mechanical energy conversion element comprising:
A vibration wave driving apparatus for inducing vibration with supply of a plurality of alternating signals, comprising:
A vibration wave driving apparatus for inducing vibration with supply of a plurality of alternating signals, comprising:
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
Having a non-rectangular cross-section in a plane orthogonal to the stacking direction, e.g. polygonal or circular in top view: the cross-section…
Producing rotary motion, e.g. rotary motors: langevin motors
Electrodes or interconnections, e.g. leads or terminals: further connection or lead arrangements, e.g. flexible wiring boards, terminal pins
Electric solid-state devices not otherwise provided for
Term ended 12 Nov 2022 (estimated)
1. Field of the Invention
The present invention relates to a stacked type electro-mechanical energy conversion element and a vibration wave driving apparatus of stacked structure consisting of a stack of a plurality of piezoelectric bodies and, more particularly, to a configuration for connecting electrodes between layers in the stacked type electro-mechanical energy conversion element.
2. Related Background Art
FIG. 1 is a perspective view showing the appearance of a stacked type piezoelectric element according to the present invention;
FIG. 2 is an exploded perspective view and an appearance perspective view of a stacked piezoelectric body 5 of FIG. 1;
FIG. 3A is a development of a circuit board 6 of FIG. 1;
FIG. 1 is a perspective view showing the appearance of the stacked piezoelectric element 1 which is a stacked type electro-mechanical energy conversion element according to the present invention.
The stacked piezoelectric element 1 is comprised of a stacked piezoelectric body 5 of ring shape provided with a hole portion in the central region and a circuit board 6 constructed of a flexible printed board and as a wiring layer provided on the outer peripheral surface of the stacked piezoelectric body 5.
FIG. 2 is an exploded perspective view of the stacked piezoelectric body 5. The second and lower piezoelectric layers 2 of the stacked piezoelectric body 5 are of the structure similar to that of the piezoelectric layers 102 shown in FIG. 5. The internal electrodes 3 of the quartered structure are formed on the surfaces of a plurality of piezoelectric layers 2. In other words, the piezoelectric layers 2 and the electrode films 3 are alternately superimposed in a stacked state. The number and shape of internal electrodes 3 are determined according to the number and mode of bending vibrations generated in the vibration wave motor, and thus the shape of the internal electrodes 3 is not limited to the quartered shape as shown in FIG. 2.