Electronic percussion instrument, stroke detection device, and stroke detection method

An electronic percussion instrument, comprising:

• a disk-shaped frame in which a concave part recessed toward a lower surface side is formed at an outer edge part of an upper surface;
• a sensor disposed in the concave part of the frame;
• and
• a cover covering the frame in a state in which a space that can receive the sensor is formed,
• wherein the cover includes a protrusion part formed in a protrusion shape protruding from a lower surface of the cover to the sensor and disposed having a gap between the protrusion part and the sensor, and
• a thickness dimension of the cover is substantially constant in a region facing the concave part, in which the protrusion part is not formed,
• wherein the cover includes an upper cover part which covers an upper surface side of the frame and in which the protrusion part is formed, and a lower cover part which is connected to an outer edge of the upper cover part and covers a range from an outer edge of the frame to an outer edge side of a lower surface of the frame, and
• an inner edge side of the lower cover part is bonded to the lower surface of the frame in a state in which the lower surface of the frame is not bonded to an outer edge side of an upper surface of the lower cover part and deformation of the lower cover part toward an inner circumferential side is permitted on a side of the lower surface of the frame.