Patent ID: 7126262

Claim:
A piezoelectric vibration gyro element, comprising: a pair of detecting resonant arms extending from a central supporting part to both sides and including first detecting electrodes each on front and back main surfaces and second detecting electrodes each on side surfaces; a pair of connecting arms extending from the central supporting part to both sides in a direction perpendicular to the detecting resonant arms; two pairs of driving resonant arms extending from each far end of the connecting arms to both sides in a direction perpendicular to the connecting arms and including first driving electrodes each on front and back main surfaces and second driving electrodes each on side surfaces; an extension part extending from each far end of the connecting arms in a direction in which each of the connecting arms extends; and a flat surface included in side surfaces of the extension part extending to both sides along a direction in which an end surface of the extension part extends and perpendicular to a direction in which the driving resonant arms extend; the first driving electrodes on the front and back main surfaces of the driving resonant arms being electrically coupled to each other by a wiring pattern passing across the end surface of the extension part in a thickness direction and joining the end surface and front and back main surfaces of the extension part; the piezoelectric vibration gyro element further comprising: a first flat surface having face that is perpendicular to a direction in which the detecting resonant arms extend, a second flat surface having face that is in parallel with a direction in which the detecting resonant arms extend, and a tapered part obliquely intersecting the first and second flat surfaces, both of the flat surfaces and the tapered part included in side surfaces of the central supporting part; and a tapered part obliquely intersecting a flat surface of a driving resonant arm and a flat surface of the extension part, the flat surface of the driving resonate arm extending in a direction in which the driving resonate arms extend, the flat surface of the extension part extending in a direction in which the extension part and the connecting arms extend, the first detecting electrodes on the front and back main surfaces of the detecting resonant arms being electrically coupled to each other by a wiring pattern passing across the tapered part in a thickness direction and joining the front and back main surfaces of the central supporting part.