| 摘要 |
本发明的晶体振子可不对振动特性造成不良影响地设置小型且结构简单的支撑部，频率温度特性优异且设计的自由度高。使晶体的XYZ轴绕X轴旋转+37°~+51.5°而形成X'轴、Y'轴、Z'轴，使X'轴与Z'轴绕Y'轴旋转45°而形成X"轴及Z"轴。晶体板为将具有分别与X"轴及Z"轴平行的边的长方形设为基准长方形，而使基准长方形的至少一对相向的边分别向基准长方形的外方凸出而成的形状，且在X"方向及Z"方向上分别具有纵向振动模式。在两个纵向振动模式结合时，将对晶体板进行支撑的支撑部连接于基准长方形的顶点附近的位置且X"方向或Z"方向的振动位移极小的位置。 A crystal resonator includes a blank and a supporting portion. The blank is cut out from a crystal parallel to a surface that includes an X”-axis and a Z”-axis respectively obtained by rotating an X’-axis and a Z’-axis by 45° around a Y’-axis in a direction from the Z’-axis toward the X’-axis. The X’-axis, the Y’-axis, and the Z’-axis are respectively obtained by rotating a crystallographic X-axis, Y-axis, and Z-axis of the crystal by equal to or more than +37° and equal to or less than 51.5° |
