Snap-fastening structure for securing a drum counterhoop to a drum shell

A snap-fastening structure of a drum comprises a fixing socket disposed laterally on a surface of a drum shell, a drum clasp snap-fastened at a counterhoop, and a link bolt penetrating the drum clasp to join the fixing socket. The drum clasp is a clamp body having a clamp-fastening portion extended downward and folded inward to form a clamping which provides, a firm retention of the drum clasp at the counterhoop and a buffer space for reducing influences to vibration of the batter head for thickening and solidifying the timbre of drumbeats.

BACKGROUND OF THE INVENTION 
The invention relates to an improved snap-fastening structure of a drum, 
particularly to a snap-fastening structure with a better fastening 
efficacy that can be retained and positioned at the counterhoop 
efficiently and is capable of reducing influences to vibration of the 
batter head of a drum. 
A snap-fastening structure is commonly used to combine a counterhoop with a 
drum shell to form a conventional drum. As shown in FIG. 1, a 
snap-fastening structure usually comprises a fixing socket, a drum clasp, 
and a tension bolt, wherein the fixing socket is disposed on lateral 
surface of the drum shell at a proper position; and the drum clasp is a 
clamp body folded to form a clamping portion snapping at the counterhoop; 
and the tension bolt penetrating the drum clasp is screw-jointed to the 
fixing socket for anchoring the counterhoop at the drum shell. 
However, since the counterhoop is a circular hoop body, a flat 
clamp-fastening portion can not be fixed intimately to the areuate shape 
of the counterhoop, and moreover, in case the flat clamping fastening 
portion is relatively far wider than the thickness of the counterhoop, a 
clearance in between the drum clasp and the counterhoop will become larger 
accordingly to estrange intimacy of the drum clasp and the counterhoop so 
that the resonance of drumbeats may be affected to degrade the timbre. 
Besides, as for space saving when packing the drums, the smaller drum is 
usually put into the middle drum, then the middle drum into the larger 
drum. In this packing process, the batter head of a relatively larger drum 
must be detached from the drum shell to accommodate the smaller drum, and 
in the case of a conventional drum, when the batter head is dismounted and 
removed from the drum shell, the drum clasps will be displaced from the 
original positions, and it is inconvenient and troublesome to resume 
positioning and tuning when reassembling. 
SUMMARY OF THE INVENTION 
In order to remedy the aforementioned defects, this invention comprises a 
drum clasp and a link bolt, wherein a clamp-fastening portion of the drum 
clasp is extended downward and folded inward to form an elastic clamping 
head to enable the drum clasp to clamp firmly at the counterhoop of a 
drum. 
Another object of this invention is to provide a buffer space for reducing 
influences to vibration of the batter head to thicken and solidify the 
timbre of drum beats. 
A further object of this invention is to keep the drum clasp at the 
counterhoop when the counterhoop is detached from the drum shell so that a 
re-tuning process wouldn't be necessary when reassembling.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
As shown in FIG. 2, the improved snap-fastening structure of this invention 
comprises a fixing socket 1, a drum clasp 2 and a link bolt 3 that unites 
the fixing socket 1 and the drum clasp 2, wherein the fixing socket 1 with 
a threaded bore 11 locates laterally on the drum shell 4 (As shown in FIG. 
3) at an appropriate position. 
A drum clasp 2 having a clamp-fastening portion 21 is clamp-fastened at a 
counterhoop 5, wherein the clamp-fastening portion 21 is extended downward 
and folded inward to form a clamping head 22, and in addition, a reception 
groove 23 is provided at a proper position in the clasp 2 for 
accommodating the threaded link bolt 3, which is a threaded rod used to 
penetrate the reception groove 23 and engage the threaded bore 11. 
By availing itself of the above mentioned components, the clasp 2 of this 
invention can clamp firmly at the counterhoop 5 (As shown in FIG. 3) for 
positioning purpose and for waiving a re-tuning process when reassembling, 
and also to provide a buffer space that can reduce influences from 
vibration of the batter head of a drum. 
As shown in FIG. 3 and 4, a plurality of the structures of this invention 
are uniformly disposed laterally on the circumferential surface of a drum 
shell 4, wherein the fixing sockets 1 are distributed uniformly on lateral 
surface of the drum shell 4, and the drum clasps 2 are equally spaced and 
clamped at the counterhoop 5 by virtue of the clamp-fastening portions 21 
at corresponding positions to the fixing sockets 1, and the link bolt 3 is 
employed to secure the reception groove 23 of the drum clasp 2 to the 
threaded bore 11 of the fixing socket 1 to combine the counterhoop 5 with 
the drum shell 4. 
The clamping head 22 is formed by extending and folding the clamp-fastening 
portion 21, the latter receiving the counterhoop 5 at its inner side, and 
by elasticity of the clamping head 22, the drum clasp 2 can be clenched 
tightly at the counterhoop 5 and positioned properly. Such an arrangement 
eliminates the re-tuning process when reassembling a drum and provide a 
buffer space for reducing influences from vibration of the batter head in 
order to thicken and solidify the timbre of drumbeats. 
As shown in FIG. 5, a drum clamp 6 of another embodiment of this invention 
comprises a clamp seat 61 and above it a clamp piece 62, wherein a free 
end of the clamp 62 is bent downward to form a clamping portion 621, which 
is further folded inward to form a clamping head 622. When the drum clamp 
6 is retained at the counterhoop 5, a narrower clearance and a stable 
retention can be attained (As shown in FIG. 3), and moreover, a 
positioning efficacy that eliminates retuning when reassembling, and a 
buffer space instrumental to reduce influences to vibration of the batter 
head are also achievable. 
Although, this invention has been described in terms of preferred 
embodiments, it is apparent that numerous variations and modifications may 
be made without departing from the true spirit and scope thereof, as set 
forth in the following claims.