U.S. patent application number 12/436941 was filed with the patent office on 2010-11-11 for oscillating racket frame.
Invention is credited to Chen-Chung Chang.
Application Number | 20100285908 12/436941 |
Document ID | / |
Family ID | 43062669 |
Filed Date | 2010-11-11 |
United States Patent
Application |
20100285908 |
Kind Code |
A1 |
Chang; Chen-Chung |
November 11, 2010 |
OSCILLATING RACKET FRAME
Abstract
An oscillating racket frame includes a main frame formed as a
closed annular ring with an inner circumference and an outer
circumference, and a net weaved inside the inner circumference with
strings. A hole is bored in the frame from the outer circumference
through the inner circumference, used to accommodate an oscillating
device provided with a main body having two ends pivotally combined
with an inner wall of the hole, so that the body can swing in the
hole against the axial line. Moreover, bored through the body are
plural net holes for the strings to pass through.
Inventors: |
Chang; Chen-Chung; (Shen
Kang, TW) |
Correspondence
Address: |
SINORICA, LLC
2275 Research Blvd., Suite 500
ROCKVILLE
MD
20850
US
|
Family ID: |
43062669 |
Appl. No.: |
12/436941 |
Filed: |
May 7, 2009 |
Current U.S.
Class: |
473/522 |
Current CPC
Class: |
A63B 60/54 20151001;
A63B 49/02 20130101 |
Class at
Publication: |
473/522 |
International
Class: |
A63B 49/02 20060101
A63B049/02 |
Claims
1. An oscillating racket frame comprising a main frame formed as a
closed annular ring, said main frame including an inner
circumference and an outer circumference, a net formed by weaving
strings inside said inner circumference; and said oscillating
racket frame characterized by having a hole in said outer
circumference communicating with said inner circumference and
employed to accommodate an oscillating device, said oscillating
device provided with a body having two ends pivotally combined with
an inner wall of said hole so that said body can swing in said hole
against an axial line of said hole, said body of said oscillating
device also provided with plural net holes that are bored through
vertically from said outer circumference to said inner
circumference for said strings to pass through.
2. The oscillating racket frame as claimed in claim 1, wherein said
hole of said main frame is formed rectangular and provided with a
U-shaped groove formed at two lateral sides respectively with an
opening outwardly facing to said outer circumference.
3. The oscillating racket frame as claimed in claim 2, wherein said
body of said oscillating device is provided with a column extended
outward respectively from two ends corresponding to two lateral
sides of said hole for being accommodated in said U-shaped
groove.
4. The oscillating racket frame as claimed in claim 3, wherein a
gap is formed between two longitudinal sides of said hole and said
main body of said oscillating device.
5. The oscillating racket frame as claimed in claim 4, wherein said
gap has a distance of 2.about.3 mm.
6. The oscillating racket frame as claimed in claim 2, wherein a
reinforced rib is formed in said hole with two ends combined with
two longitudinal sides of said hole.
7. The oscillating racket frame as claimed in claim 6, wherein said
reinforced rib is provided with an arc groove formed in a top for
corresponding to a slot formed in a bottom of said body of said
oscillating device.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates to a racket frame, particularly to
one able to swing so as to absorb vibration to prevent a user's
hand from hurt.
[0003] 2. Description of the Prior Art
[0004] Commonly, in order to achieve a robust rigidity, a
conventional racket frame has always been integrally made to shape
as a close annular ring, with a plurality of holes bored around it
for strings to pass through to extend longitudinally or
transversely. However, as the strings are immovably fastened with
the racket frame, their activity and coefficient of restitution is
restrictively limited to enable the racket to heavily vibrate,
resulting in heavily burdening the muscle of a hand, even possible
to harm a user's wrist or elbow.
SUMMARY OF THE INVENTION
[0005] The object of this invention is to offer an oscillating
racket frame.
[0006] The oscillating racket frame includes a main frame formed as
a closed annular ring with an inner circumference and an outer
circumference, and a net weaved inside the inner circumference with
strings. A rectangular hole is bored in the main frame from the
outer circumference through the inner circumference, used to
accommodate an oscillating device, which is provided with a body
having two ends pivotally combined with an inner wall of the hole,
so that the body can swing in the hole against the axial line.
Moreover, bored through the main body are plural net holes for the
strings to pass through. In using, when the racket hits a ball, the
oscillating device can be dragged by the strings to swing backward
in a certain angle to enable the strings to increase activity and
coefficient of restitution, so that the impact of the ball can be
lowered to weaken the vibration so as to prevent a user's hand from
hurt. Moreover, even if only some of the strings are stricken, the
oscillating device is still able to drive other strings to
concurrently work together to create a stronger bouncing-back
force.
BRIEF DESCRIPTION OF DRAWINGS
[0007] This invention is better understood by referring to the
accompanying drawings, wherein:
[0008] FIG. 1 is a perspective view of a first preferred embodiment
of an oscillating racket frame in the present invention;
[0009] FIG. 2 is a partial magnified perspective view of the first
preferred embodiment of an oscillating racket frame in the present
invention;
[0010] FIG. 3 is a partial cross-sectional view of the first
preferred embodiment of an oscillating racket frame in the present
invention;
[0011] FIG. 4 is an illustrating view of the first preferred
embodiment of an oscillating racket frame in the present invention,
showing it being stricken by a ball; and
[0012] FIG. 5 is a partial magnified perspective view of a second
preferred embodiment of an oscillating racket frame in the present
invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0013] As shown in FIGS. 1.about.3, a first preferred embodiment of
an oscillating racket frame in the present invention includes a
main frame 10, a net 20 and an oscillating device 30.
[0014] The main frame 10 is formed as a closed annular ring,
provided with an outer circumference 11, an inner circumference 12
internally assembled with the net 20, a rectangular hole 13 cut in
a top to keep the outer circumference 11 communicating with the
inner circumference 12, and a U-shaped groove 14 formed next to
each of two lateral sides 131 of the rectangular hole 13
respectively. Each of the U-shaped grooves 14 has an opening 141
outwardly facing to the outer circumference 11.
[0015] The net 20 is formed by alternately weaving strings 21 in
the longitudinal and latitudinal direction.
[0016] The oscillating device 30 is installed in the rectangular
hole 13, provided with a rectangular main body 31 and a column 32
extended outward from two short sides respectively to
correspondingly fit in the U-shaped groove 14 of main frame 10.
With a gap of 2.about.3 mm existing between two longitudinal sides
132 of the rectangular hole 13 and the main body 31, the main body
31 can thus reciprocate in the rectangular hole 13 against the
axial line. Furthermore, the oscillating device 30 is also provided
with plural net holes 33 that are bored through vertically from the
outer circumference 11 to the inner circumference 11 and spaced
apart equidistantly, for the strings 21 to pass through.
[0017] In using, as shown in FIG. 4, when a tennis ball 40 hits on
the net 20, the oscillating device 30 is to be dragged by the
strings 21 to swing backward in a certain angle to absorb the
impact of the tennis ball 40, and thus vibration can be weakened to
prevent a player from hurt. Moreover, as most of the main ones of
the strings 21 are fastened with the oscillating device 30, the
oscillating device 30 is still able to drive other strings 21 to
concurrently work together to create a stronger bouncing-back force
even if only some of the strings 21 are stricken while hitting the
tennis ball 40.
[0018] As shown in FIG. 5, a second preferred embodiment of an
oscillating racket frame in the present invention has the
oscillating device 30 positioned at locations of 3 o'clock, 6
o'clock or 9 o'clock instead of 12 o'clock in the first embodiment,
or at the four locations simultaneously. Additionally, a reinforced
rib 15 is formed in the center of the rectangular hole 13, with two
ends connected with the longitudinal sides 132 of the rectangular
hole 13 and with an arc groove 151 formed in the top to correspond
to a slot 34 formed in the bottom of the oscillating device 30.
Therefore, the main frame 10 can be reinforced to upgrade its
strength so as to have a more durable structure.
[0019] While the preferred embodiment of the invention has been
described above, it will be recognized and understood that various
modifications may be made therein and the appended claims are
intended to cover all such modifications that may fall within the
spirit and scope of the invention.
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