Patent ID: 8100016

Claim:
A vibratory sensor, comprising: a resonator element including (i) a first base portion and a second base portion, each of the first and the second base portions having an upper main surface and a lower main surface, (ii) a resonating arm extended in a beam shape between the first and the second base portions to be vibrated at a predetermined resonance frequency, (iii) a first narrow portion formed by reducing a width of a portion extended from the first base portion to be smaller than a width of the first base portion in a direction orthogonal to an extending direction of the resonating arm, (iv) a second narrow portion formed by reducing a width of a portion extended from the second base portion to be smaller than a width of the second base portion in the direction orthogonal to the extending direction of the resonating arm, (v) a first support portion extended from the first narrow portion in a direction opposite to the first base portion, and (vi) a second support portion extended from the second narrow portion in a direction opposite to the second base portion, a length ratio of the first narrow portion versus the first base portion in the extending direction of the resonating arm and a length ratio of the second narrow portion versus the second base portion in the extending direction of the resonating arm being in a range of 50 to 200% inclusive; and a base supporting the resonator element, the base being connected to one of upper and lower main surfaces of each of the first and the second support portions included in the resonator element.