ANGULAR VELOCITY DETECTION DEVICE
First Claim
1. An angular velocity detection device comprising:
- a vibration body including an outer periphery;
a driver that vibrates the vibration body; and
a detector that detects vibrations generated in the vibration body due to action of an angular velocity and outputs an output signal in accordance with the angular velocity;
whereinthe vibration body includes;
a center base portion fixedly provided at a center of the outer periphery;
four first detection beam sections that extend from the center base portion in parallel or substantially in parallel with four sides defining the outer periphery, fork into two branches extending in both side directions along each side of the outer periphery, and are connected to each other at four corners of the outer periphery;
four second detection-cum-drive beam sections that extend from the first detection beam sections toward the center base portion side along each diagonal line of the outer periphery, and fork into two branches extending in both side directions along the center base portion and the first detection beam sections; and
eight mass bodies connected to both ends of each of the second detection-cum-drive beam sections extending along the first detection beam sections;
whereinthe driver causes each of the second detection-cum-drive beam sections to perform flexural vibration in a direction perpendicular or substantially perpendicular to the respective diagonal line.
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Accused Products
Abstract
An angular velocity detection device vibrates a vibration body and detects vibrations generated by angular velocity. The vibration body includes a center base portion, first detection beam sections extending from the center base section in a T shape and connected to each other at four corners, second detection-cum-drive beam sections extending from the first detection beam sections toward the center base portion side along diagonal lines of the vibration body, and mass bodies connected to both ends of each of the second detection-cum-drive beam portions. The second detection-cum-drive beam sections each perform flexural vibration within a plate surface in a direction perpendicular or substantially perpendicular to the diagonal line of the vibration body.
14 Citations
17 Claims
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1. An angular velocity detection device comprising:
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a vibration body including an outer periphery; a driver that vibrates the vibration body; and a detector that detects vibrations generated in the vibration body due to action of an angular velocity and outputs an output signal in accordance with the angular velocity;
whereinthe vibration body includes; a center base portion fixedly provided at a center of the outer periphery; four first detection beam sections that extend from the center base portion in parallel or substantially in parallel with four sides defining the outer periphery, fork into two branches extending in both side directions along each side of the outer periphery, and are connected to each other at four corners of the outer periphery; four second detection-cum-drive beam sections that extend from the first detection beam sections toward the center base portion side along each diagonal line of the outer periphery, and fork into two branches extending in both side directions along the center base portion and the first detection beam sections; and eight mass bodies connected to both ends of each of the second detection-cum-drive beam sections extending along the first detection beam sections;
whereinthe driver causes each of the second detection-cum-drive beam sections to perform flexural vibration in a direction perpendicular or substantially perpendicular to the respective diagonal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification