Resonator element of the tuning fork type, oscillator and electronic device

摘要

A resonator element capable of improving impact resistance is provided. A quartz crystal resonator element is a resonator element formed by etching a Z plate which is cut at predetermined angles with respect to the quartz crystal axes of a quartz crystal. The quartz crystal resonator element includes a base (10), a pair of resonating arms (11) extending from the base in the Y-axis direction, and a positive X-axis notch (12) and a negative X-axis notch (13) formed by notching the base in the X-axis direction. The positive X-axis notch (12) is formed by notching the base (10) from the negative side of the X axis towards the positive side so that the width of the positive X-axis notch (12) increases as it approaches the outer circumference.