a gong striking mechanism is provided , which comprises a driving electric motor mounted on a frame within a gong , and conversion means rotationally connected directly or indirectly to the motor shaft for converting continuous rotational motion of the motor shaft to reciprocal gong striking motion . in a preferred embodiment of the invention the conversion means comprises an eccentric cylinder fixed to the motor shaft , and a hammer made of hollow cylinder in spaced internal arrangement with the eccentric cylinder to absorb impact strength and improve sound volume .