| 摘要 |
PROBLEM TO BE SOLVED: To provide a vibration element capable of exhibiting excellent vibration characteristics while reducing increase in the CI value, and to provide a vibrator including the vibration element, an oscillator, an electronic apparatus and a mobile.SOLUTION: A vibration element 2 comprises: a proximal portion 4; and a pair of vibration arms 5, 6 provided integrally with the proximal portion 4, arranged in the X axis direction, and extending from the proximal portion 4 in the Y axis direction. The vibration arms 5, 6 include, respectively, arms 51, 61, and wide hummer heads 59, 69 located on the free end side of the arms 51, 61, and longer than the arms 51, 61 in the X axis direction. When the length of the vibration arms 5, 6 in the Y axis direction is L, and the length of the hummer heads 59, 69 in the Y axis direction is H, following relationship is satisfied: 1.2%<H/L<30.0%. When the length of the arms 51, 61 in the X axis direction is W1, and the length of the hummer heads 59, 69 in the X axis direction is W2, following relationship is satisfied: 1.5≤W2/W1≤10.0. |
