Patent ID: 7825318

Claim:
A drumhead tightening device including a lug secured to a shell of a drum, a lug bolt screwed to the lug, and a hook, which is located at a head portion of the lug bolt and is engaged with a hoop fitted to an open end of the shell, wherein, when the hook is engaged with the hoop and the lug bolt is tightened to the lug, the drumhead, which closes the open end of the shell, is mounted on the shell via the hoop, the drumhead tightening device comprising: a retaining member, which is mounted on the lug bolt and retains the position of the hook with respect to the lug bolt; a locking member, which is mounted on the lug bolt and retains the lug bolt so as not to be loosened with respect to the lug, wherein the locking member is formed of an elastic member having a through hole through which the lug bolt is inserted, and wherein the retaining member is mounted on the lug bolt in a state where the hook is arranged between the head portion of the lug bolt and the retaining member.