Movement detector
First Claim
1. A movement detector which is rotatably attached to a base member, comprising:
- a rotating member which has a body portion, and a connecting portion which rotatably connects the body portion to the base member;
a piezoelectric layer which is formed on the connecting portion; and
a plurality of electrodes which are provided on the piezoelectric layer and arranged in a direction of a rotation axis of the body portion, and which detect a voltage generated in the piezoelectric layer corresponding to a deformation of the connecting portion when the body portion is displaced with respect to the base member;
wherein the detector detects a component of movement in a direction, which is different from a direction orthogonal to the direction of the rotation axis of the body portion, based on a difference in voltage signals detected by the electrodes.
1 Assignment
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Accused Products
Abstract
A movement detector which is rotatably installed on a base member includes a rotating member which has a body portion, and a connecting portion which rotatably connects the body portion to the base member, a piezoelectric layer which is formed on the connecting portion, and a plurality of electrodes which are provided on the piezoelectric layer, to be arranged in a direction of a rotation axis of the body portion, and which detect a voltage generated in the piezoelectric layer corresponding to a deformation of the connecting portion when the body portion has displaced with respect to the base member. Since the piezoelectric layer and the plurality of electrodes are provided to the connecting portion which rotatably connects the body portion to the base member, it is possible to detect a plurality of types of movements of the body portion by the piezoelectric layer and the plurality of electrodes.
7 Citations
12 Claims
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1. A movement detector which is rotatably attached to a base member, comprising:
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a rotating member which has a body portion, and a connecting portion which rotatably connects the body portion to the base member; a piezoelectric layer which is formed on the connecting portion; and a plurality of electrodes which are provided on the piezoelectric layer and arranged in a direction of a rotation axis of the body portion, and which detect a voltage generated in the piezoelectric layer corresponding to a deformation of the connecting portion when the body portion is displaced with respect to the base member; wherein the detector detects a component of movement in a direction, which is different from a direction orthogonal to the direction of the rotation axis of the body portion, based on a difference in voltage signals detected by the electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification