Piezoelectric device with asymmetrically mounted tuning-fork type piezoelectric vibrating piece

A piezoelectric device having a longitudinal axis and a lateral axis perpendicular to said longitudinal axis, said piezoelectric device comprising:

• a piezoelectric vibrating piece having center of gravity, a base portion, a pair of vibrating arms extending from the base portion generally parallel with said longitudinal axis, a pair of supporting arms extending from the base portion, and only one pair of connection portions disposed on the pair of the supporting arms;
• a concave package having a bottom surface which accommodates the piezoelectric vibrating piece and side faces surrounding the bottom surface, in which a pair of electrode pads corresponding to the connection portions are formed on the bottom surface;
• and
• conductive adhesive for bonding the pair of the electrode pads with the pair of connection portions,
• wherein said pair of electrode pads and one pair of connection portions are disposed asymmetrically with respect to both a line passing through said center of gravity and parallel with said longitudinal axis and a line passing through said center of gravity and parallel to said lateral axis and an electrical and mechanical connection between said piezoelectric vibrating piece and said package consists essentially of said adhesive bonding said pair of electrode pads with said one pair of connection portions.