Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1997-06-19
1999-06-29
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310323, H01L 4108
Patent
active
059172711
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a piezo-electric driving device for linear or circular driving.
PRIOR ART
A conventional driving device pushes its kicking member in the direction opposite to the movement direction of a driven body, and kicks the driven body so as to drive the driven body.
However, the kicking operation of the driving device is just a simple kicking-down operation exerted on the driven body, wherein the torque and speed of the operation are determined by mechanically setting various values for the lengths and positions of the kicking member. Therefore, the driving device cannot be controlled easily, and is disadvantageous in that the driving device is applicable only to driven bodies made of limited kinds of materials.
Accordingly, an object of the present invention is to provide a piezo-electric driving device capable of allowing a driven body to be made of a wide variety of materials and to be easily controlled with respect to speed and back-and-forth movement.
DISCLOSURE OF THE INVENTION
The piezo-electric driving device of the present invention comprises a plurality of piezo-electric oscillators, a supporter for supporting the plural piezo-electric oscillators arranged in parallel so that the piezo-electric oscillators have the same oscillation direction, a connector for mutually connecting the oscillation portions of the plural piezo-electric oscillators in the direction perpendicular to the oscillation direction, and a kicking member projected from the intermediate portion of the connector in the oscillation direction, wherein the piezo-electric oscillators have different oscillation phases so that the kicking member can perform a kicking operation.
In accordance with this piezo-electric driving device, when electric power is supplied to the plural piezo-electric oscillators, each piezo-electric oscillator oscillates. Because of difference in phase among the piezo-electric oscillators, the tip of the kicking member can kick a driven body in a plane including the oscillation direction of the piezo-electric oscillators, thereby moving the driven body in the kicking direction of the kicking member. In this case, the movement locus of the kicking member can be changed by changing the phase difference and amplitude of an electric signal supplied to each piezo-electric oscillator, whereby the speed and the back-and-forth movement of the driven body can be controlled easily. In addition, the material of the driven body can be selected from among a wide variety of materials.
Furthermore, the piezo-electric driving device of the present invention comprises two piezo-electric oscillators.
Moreover, the piezo-electric driving device of the present invention comprises two or more piezo-electric oscillators arranged in parallel along a straight line, the connector mutually connects the piezo-electric oscillators, and the kicking member is projected from the intermediate portion of the connector.
With this piezo-electric driving device, torque can be increased without using larger piezo-electric oscillators.
Besides, the piezo-electric driving device of the present invention comprises a plurality of piezo-electric oscillators, a supporter for supporting the plural piezo-electric oscillators arranged in a ring-shape so that the piezo-electric oscillators have the same oscillation direction, a radial connector for mutually connecting the oscillation portions of the plural piezo-electric oscillators in the direction perpendicular to the oscillation direction, and a kicking member projected from the central portion of the radial connector in the oscillation direction, wherein the piezo-electric oscillators have different oscillation phases so that the kicking member can perform kicking operation.
With this piezo-electric driving device, it is possible to change the direction of the reciprocating movement thereof.
Additionally, the piezo-electric driving device of the present invention comprises two piezo-electric oscillators, a supporter for supporting the two piezo-elect
REFERENCES:
patent: 3668442 (1972-06-01), Vosseler
patent: 4613782 (1986-09-01), Mori et al.
patent: 5233258 (1993-08-01), Myoga et al.
Budd Mark O.
Koyo Sangyo Co., Ltd.
USM Co., Ltd.
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