Resonator and resonance device

A resonance device comprising:

• a resonator including a base, three or more vibration arms extending parallel to each other and each having a fixed end connected to the base and weight portions on an open end, and a frame disposed at least in a part of a periphery of the three or more vibration arms and configured to hold the base;
• a first substrate and a second substrate that form a vibration space that accommodates the resonator;
• and
• a protrusion that protrudes into the vibration space from an inner surface of at least one of the first substrate or the second substrate,
• wherein the frame includes a first projection disposed at a position that faces the weight portion of at least one vibration arm of the three or more vibration arms in a plan view of the resonator,
• wherein the first projection protrudes in a length direction of the at least one vibration arm in the plan view,
• wherein the weight portion of the at least one vibration arm has a notch at the open end that is narrower than other parts of the weight portion in a width direction of the at least one vibration arm in the plan view, and
• wherein the first projection faces the notch.

A resonance device comprising:

• a resonator including a base, a plurality of vibration arms each having a fixed end connected to the base and weight portions on an open end, and a frame disposed around at least a part the plurality of vibration arms and configured to hold the base, the plurality of vibration arms extending parallel to each other;
• a first substrate and a second substrate that form a vibration space that accommodates the resonator;
• and
• a first protrusion that protrudes into the vibration space from an inner surface of at least one of the first substrate and the second substrate and that faces a weight portion of at least one vibration arm of the plurality of vibration arms,
• wherein the first protrusion has one end connected to an inner surface of the first substrate and another end connected to an inner surface of the second substrate.