Stretching structure of a drum foot pedal

Details Stretching structure of a drum foot pedal Stretching structure of a drum foot pedal

2000-01-28

2001-05-29

Hsieh, Shih-Yung (Department: 2837)

Music

Instruments

Drum and cymbal beaters

C084S422200, C084S422300, C084S421000

Reexamination Certificate

active

06239342

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention is related to an improvement in the stretching structure of a drum foot pedal and in particular to one which can be accurately controlled to apply force to beat a drum.
2. Description of the Prior Art
Referring to
FIGS. 1
,
2
,
3
A and
3
B, the conventional drum foot pedal includes a base
1
, a pedal member
2
, a chain
51
connecting the pedal member
2
to a hexagonal axle
3
, a pair of bearings
4
, a pair of sleeves
12
, a stick
5
and a stretching mechanism
6
. The stretching mechanism
6
includes a connector
62
which is fixedly mounted on the hexagonal axle
3
by a pin
61
, a spring
63
connected at the upper end with the connector
62
, a screw rod
64
connected with the lower end of the spring
63
, and a locking nut
66
engaged with the lower portion of the screw rod
64
. However, when the pedal
2
is depressed to beat a drum, the screw rod
64
will be pulled by the spring
63
and will be slightly turned clockwise or counterclockwise thereby loosening the nut
66
and therefore forming a clearance between the nut
66
and the flange
113
. Accordingly, it is impossible to control the force applied to the stick
5
. In addition, there will be a delay in moving the stick
5
. Furthermore, the spring
63
will be slightly distorted during the operation of the drum foot pedal hence making the drum foot pedal unable to be operated smoothly.
SUMMARY OF THE INVENTION
This invention is related to an improvement in the stretching structure of a drum foot pedal.
According to a preferred embodiment of the present invention, the drum foot pedal includes a base having two upwardly extending arms provided two sleeves at the upper ends thereof, a pedal having an end pivotally mounted on the pedal, a hexagonal axle, two bearings fitted in the sleeves, a stick having an end fixedly mounted on the hexagonal axle, a block member provided with a chain which extends downwardly to engage with another end of the pedal, and a stretching mechanism mounted between an end of the hexagonal axle and a flange of one of the arms, the improvement wherein the stretching mechanism comprises a connector fixedly mounted on the hexagonal axle by a pin, a spring having an upper end connected with the connector, a screw rod having an upper end connected with a lower end of the spring, a nut threadedly engaged with an intermediate portion of the screw rod, and a locking nut threadedly engaged with a lower portion of the screw rod, the flange being formed at the bottom with two cross inclined surfaces and a slot in which is fitted a positioning plate having a semi-circular hole, the screw rod having an intermediate portion formed with a semi-circular cross section configured to engage with the semi-circular hole and having two cross inclined surfaces configured to engage with the two cross inclined surfaces of the flange.
It is the primary object of the present invention to provide an improvement in the structure of a drum foot pedal which can be accurately controlled to the force applied to the drum.
It is another object of the present invention to provide an improvement in the structure of a drum foot pedal wherein the spring will not be distorted in operation thereby ensuring the smooth operation of the drum foot pedal.
The foregoing objects and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example.


REFERENCES:
patent: 5365824 (1994-11-01), Hoshino
patent: 5798472 (1998-08-01), Shigenago
patent: 6093878 (2000-07-01), Hoshino

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