| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a supporting mechanism of a bending vibration piece, which prevents vibration leakage from a vibration arm to a supporting arm and improves impact resistance. <P>SOLUTION: A tuning-fork type resonator piece 1 includes a pair of vibration arms 3, 4 whose base ends are connected to a base 2 and extended therefrom, and supporting arms 7, 8 which are connected to the base and arranged on both sides of the base in a width direction. The base has a reduced cross-section 15 along both sides thereof, which is formed by making cutouts 13, 14 between the connection with the vibration arms and the connection with the supporting arms. In the reduced cross-section, a length L is set to satisfy the relationship 2×W1≤L≤6×W1 with respect to an arm width W1 of the vibration arms and a width W3 is set to satisfy the relationship W3<W2 with respect to a width W2 between outer side edges of the vibration arms. The supporting arms are connected so that rounded corners 16, 17 are interposed between supporting arms 9, 10 extending both sides of the vibration arms in parallel and connections 11, 12 that connect the supporting arms 9, 10 to the base. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
