US20100285908A1

US20100285908A1 - Oscillating racket frame

Info

Publication number: US20100285908A1
Application number: US12/436,941
Authority: US
Inventors: Chen-Chung Chang
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-07
Filing date: 2009-05-07
Publication date: 2010-11-11

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.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
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.
2. Description of the Prior Art
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

The object of this invention is to offer an oscillating racket frame.
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

This invention is better understood by referring to the accompanying drawings, wherein:

FIG. 1 is a perspective view of a first preferred embodiment of an oscillating racket frame in the present invention;

FIG. 2 is a partial magnified perspective view of the first preferred embodiment of an oscillating racket frame in the present invention;

FIG. 3 is a partial cross-sectional view of the first preferred embodiment of an oscillating racket frame in the present invention;

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

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

As shown in FIGS. 1˜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.
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.
The net 20 is formed by alternately weaving strings 21 in the longitudinal and latitudinal direction.
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˜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.
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.
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.
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.

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˜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.