Music – Instruments – Drums
Reexamination Certificate
2001-01-09
2002-12-03
Hsieh, Shih-Yung (Department: 2837)
Music
Instruments
Drums
C084S413000, C084S41100A
Reexamination Certificate
active
06489547
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a metal drum frame with fixing lugs, and more particularly to a metal drum frame which has fixing lugs and beautiful appearance and is manufactured at lower cost.
FIG. 9
shows a conventional metal drum frame
7
of a small-size drum. The drum frame
7
is made of a metal sheet by bending. The lower edge of the drum frame
7
is formed with an outward horizontally extending flange
71
having multiple locking sections
72
. Each locking section
72
has a thread hole
73
. A bolt
61
is passed through the thread hole
73
and screwed into a fixing seat
62
of the drum body
6
for tensioning the drumhead
63
.
Such drum frame
7
is made of one single metal sheet so that it has weaker strength. Therefore, such drum frame
7
is only suitable for small-size drum. In case such drum frame is applied to large-size drum, the drum frame is liable to deform and can hardly evenly tension the drumhead
63
. As a result, the quality of the drum sound will be affected.
FIG. 10
shows a metal drum frame
9
of a conventional large-size drum. The drum frame
9
is made of a metal tube by rolling and has higher strength. However, the drum frame
9
itself lacks design for the bolt
92
to pass and lock. An additional latch member
91
is used to clamp the top edge of the drum frame
9
and the bolt
92
is passed through the bolt hole of the latch member
91
and tightened, whereby the drum frame can tension the drumhead. Such latch member
91
is made by many punching steps for achieving greater strength so that the manufacturing cost is higher and the manufacturing time is longer. This increases the manufacturing cost for the drum frame.
SUMMARY OF THE INVENTION
It is therefore a primary object of the present invention to provide a metal drum frame with fixing lugs. A top and a bottom edges of the drum frame are respectively formed with hollow bulge reinforced lips. A portion of the drum frame between the lips is recessed to form a waist section. The waist section of the drum frame is punched with several outward extending lugs which have a substantially hollow hoop shape. A locking member is disposed in the lug. A bolt is passed through the locking member to tension the drumhead. According to the above arrangement, the manufacturing cost is lowered and the appearance of the drum is enhanced as well as the strength of the drum frame is increased.
REFERENCES:
patent: 887016 (1908-05-01), Poland
patent: 3105406 (1963-10-01), Ippolito
patent: 4475434 (1984-10-01), Willis
patent: 5844157 (1998-12-01), Kasha
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