Actuator
First Claim
1. An actuator of the type employing a two-degree-of-freedom vibration system, the actuator comprising:
- a pair of first mass portions;
a second mass portion provided between the pair of first mass portions;
a pair of supporting portions for supporting the pair of first mass portions and the second mass portion;
at least a pair of first elastic connecting portions which respectively connect the first mass portions to the supporting portions so that each of the first mass portions can rotate with respect to the supporting portions; and
at least a pair of second elastic connecting portions which respectively connect the second mass portion to the first mass portions so that the second mass portion can rotate with respect to the first mass portions;
wherein each of the first mass portions is driven by the application of an alternating voltage, causing the second mass portion to rotate, andwherein, if a length between a central axis for the rotation of one of the first mass portions and an end portion of the one of the first mass portions in a direction substantially perpendicular to the central axis for the rotation is defined as L1, a length between a central axis for the rotation of the other of the first mass portions and an end portion of the other of the first mass portions in a direction substantially perpendicular to the central axis for the rotation is defined as L2, and a length between a central axis for the rotation of the second mass portion and an end portion of the second mass portion in a direction substantially perpendicular to the central axis for the rotation is defined as L3, then L1, L2 and L3 satisfy the relations;
L1<
L3 and L2<
L3.
1 Assignment
0 Petitions
Accused Products
Abstract
An actuator 100 of the type employing a two-degree-of-freedom vibration system includes: a pair of first mass portions 1, 11; a second mass portion 2 provided between the pair of first mass portions 1, 11; a pair of supporting portions 3, 3 for supporting the pair of first mass portions 1, 11 and the second mass portion 2; at least a pair of first elastic connecting portions 4, 4 which respectively connect the first mass portions 1, 11 to the supporting portions 3, 3 so that each of the first mass portions 1, 11 can rotate with respect to the supporting portions 3, 3; and at least a pair of second elastic connecting portions 5, 5 which respectively connect the second mass portion 2 to the first mass portions 1, 11 so that the second mass portion 2 can rotate with respect to the first mass portions 1, 11. Each of the first mass portions 1, 11 is driven by the application of an alternating voltage, causing the second mass portion 2 to rotate.
24 Citations
9 Claims
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1. An actuator of the type employing a two-degree-of-freedom vibration system, the actuator comprising:
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a pair of first mass portions; a second mass portion provided between the pair of first mass portions; a pair of supporting portions for supporting the pair of first mass portions and the second mass portion; at least a pair of first elastic connecting portions which respectively connect the first mass portions to the supporting portions so that each of the first mass portions can rotate with respect to the supporting portions; and at least a pair of second elastic connecting portions which respectively connect the second mass portion to the first mass portions so that the second mass portion can rotate with respect to the first mass portions; wherein each of the first mass portions is driven by the application of an alternating voltage, causing the second mass portion to rotate, and wherein, if a length between a central axis for the rotation of one of the first mass portions and an end portion of the one of the first mass portions in a direction substantially perpendicular to the central axis for the rotation is defined as L1, a length between a central axis for the rotation of the other of the first mass portions and an end portion of the other of the first mass portions in a direction substantially perpendicular to the central axis for the rotation is defined as L2, and a length between a central axis for the rotation of the second mass portion and an end portion of the second mass portion in a direction substantially perpendicular to the central axis for the rotation is defined as L3, then L1, L2 and L3 satisfy the relations;
L1<
L3 and L2<
L3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification