| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration piece capable of improving shock resistance, a vibrator having the vibration piece and an oscillator having the vibration piece. <P>SOLUTION: A crystal vibration piece 1 comprises a base section 10, and a pair of vibration arms 11 extending from the base section 10. Each of the vibration arms 11 includes an arm section 13 that is positioned on the side of the base section 10, a weight section 14 that is positioned on the tip side further than the arm section 13 and that is wider than the arm section 13 in width, and groove sections 17 that are formed along a longitudinal direction of the vibration arms 11 on both of a principal plane 15 and 16 opposing each other. In a plane view, a coupling section 18 where the weight section 14 and the arm section 13 are coupled is formed with a curved line so as to be widened as the width of the arm section 13 comes close to the weight section 14, and also in the plane view, a connecting section 17d where a long side 17b extending in a longitudinal direction and a short side 17c extending in a direction crossing relative to the long side 17b are connected at an edge section 17a on the side of the weight section 14 in the groove sections 17 is formed with a curved line. <P>COPYRIGHT: (C)2012,JPO&INPIT |
