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Gyro-module

  • US 7,814,792 B2
  • Filed: 12/11/2007
  • Issued: 10/19/2010
  • Est. Priority Date: 01/26/2007
  • Status: Expired due to Fees
First Claim
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1. A gyro-module, comprising:

  • a first gyro element component having a first detection axis and a second detection axis, and outputting at least a signal that is based on angular velocity around the first detection axis and the second detection axis;

    a second gyro element component having a first detection axis and a second detection axis, and outputting at least a signal that is based on angular velocity around the first detection axis and the second detection axis;

    a third gyro element component having a first detection axis;

    the first, second and third gyro elements includinga base part;

    two connecting arms that extend from the base part symmetrically with respect to the base part;

    a driving arm that extends from the connecting arm symmetrically with respect to the connecting arms; and

    two detection arms that extend from the base part symmetrically with respect to the base part and in a direction orthogonal to the connecting arms, wherein the first gyro element component and the second gyro element component have a weight part on the detection arms and the driving arm, the weight part of the detection arms having a larger width than a weight part of the driving arm;

    a first operation circuit conducting an operation of an output signal from the first gyro element component and an output signal from the third gyro element component; and

    a second operation circuit conducting an operation of an output signal from the second gyro element component and an output signal from the third gyro element component, whereinthe first gyro element component, the second gyro element component and the third gyro element component are arranged in such a way that the first detection axis of the first gyro element component, the first detection axis of the second gyro element component and the first detection axis of the third gyro element component extend in a same direction and a direction in which the second detection axis of the first gyro element component is extended crosses with a direction in which the second detection axis of the second gyro element component is extended, andthe relationship between the width of the weight part of the detection arms and the width of the weight part of the driving arm satisfies the equation 5d=<

    D=<

    10d where d is the width of the weight part of the driving arm and D is the width of the weight part of the detection arms.

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