Device holder for drums

A device holder adapted for fastening to a tie rod between two counterloops of a drum to hold a rod member and an instrument on the rod member, the device holder comprising:

• a base frame shaped as a U-channel, said base frame comprising a bottom wall, two parallel upright side walls raised from said bottom wall at two opposite sides, two upright lugs respectively raised from said upright side walls at one end and defining a respective through hole, a longitudinal open-ended slot disposed in said bottom wall at an opposite end remote from said upright lugs, two arched notches respectively disposed at said upright side walls, two pivot holes respectively formed in said upright side walls and disposed between said upright lugs and said arched notches, and a bolt hole formed in said bottom wall between said upright lugs;
• a holding down device mounted in the bolt hole of said base frame and adapted for securing a rod member in the through holes of said upright lugs to hold an instrument;
• a curved retaining block having a fixed end pivotably connected between the pivot holes of said base frame by a pivot, an open-ended free end, and an arched bottom notch adapted for acting with the arched notches of said base frame to secure said base frame to one tie rod of the drum;
• and
• a fastening device pivoted to the open-ended free end of said curved retaining block and adapted for securing the open-ended free end to the bottom wall of said base frame for permitting the arched bottom notch of said curved retaining block and the arched notches of said base frame to be clamped on the tie rod of the drum.