CN1277880A

CN1277880A - Improved racket of tennis (or badmintor) for match use

Info

Publication number: CN1277880A
Application number: CN00120305A
Authority: CN
Inventors: 理查德·G·佩里
Original assignee: Dunlop Slazenger Group Ltd
Current assignee: Dunlop International Group Ltd
Priority date: 1999-06-17
Filing date: 2000-06-17
Publication date: 2000-12-27
Also published as: EP1060767A3; GB2351027A; EP1060767A2; GB0014707D0; GB9914090D0; JP2001009067A

Abstract

A games racket having a head providing a frame for a bed of strings, the strings entering holes in the frame, and at least part of the frame having a cross-section which is concave in a region where the strings enter the holes, whereby the actual area (A) occupied by the bed of strings exceeds its visible area (P) when viewing the racket face on. By increasing the actual strung area in this way, the ball speed obtainable when striking the ball can be increased, compared with a conventional racket of equivalent overall size.

Description

Improved racket of tennis (or badmintor) for match use

The present invention relates to be used for tennis, it is that part around string of racket that the racket head of the racket of squash or shuttlecock, this racket head are restricted to.

The racket head framework must be firmly hard in case can bear string tensioning produced makes a concerted effort, the value of this power can be at main string and laterally reach 500kg power on each direction of string in the tennis racket.And the racket head framework must be able to bear the bending of the suspended wall mode on the direction that is approximately perpendicular to plane, string place.This means that the part that runs through the racket head framework must be able to provide the very high suspended wall rigidity part of racket head framework axis (promptly along), still, because the general avette profile of racket racket head, racket racket head zone also must provide very high torsion rigidity usually.When ball or shuttlecock were impacted during the games, the high suspended wall rigidity in racket head zone and high twist rigidity also need offer the racket racket head and occur in ability perpendicular to the torsional deformation that power was caused on the string plane with opposing.For reaching this requirement, common racket nature evolution is circular, avette, square, or the racket head cross section of rectangle.In addition, the racket in this cross section is easy to make.

Under the situation of the restriction that meets the regular defined that authority's (being International Tennis Federation) formulates and under the acceptable weight under intensity that causes by the bat frame shelf structure and rigidity restriction, another requirement of racket is that the shared entire area of string should be big as much as possible.As hereinafter described, improve the strength that the string area can cause improving racket.

The present invention's purpose described herein is explanation one racket racket head cross section, this section optimal above-mentioned requirements and selectively change to some extent and produce some other desired feature around the racket racket head.

According to the present invention, a kind of racket of tennis (or badmintor) for match use is provided, this bat has racket head, be provided as the framework of string pedestal on the racket head, the string perforation is arranged on the racket head framework, in the string punched areas one concave cross section is arranged to small part bat frame frame, therefore when when racket is observed, the shared real area of string pedestal has exceeded its effective area.

The present invention wears the string area with respect to what the racket head overall size can improve racket head.

The different cross section of racket head framework as described below is possible.In preferred embodiment, concave regions forms the total cross section of crescent profile in conjunction with the outer cross section of racket head framework bending.

Concave regions is provided with around the racket head inner rim.Selectively, concave regions can be only in one or more particular settings of racket head framework.In preferred embodiment, only concave portions is set on racket handle phase negative side's top (for example half part at top).

Concave regions does not need the fixed shape and the degree of depth, but with changing around the racket head frame position, perhaps changes with respect to string hole (for example the hole is on every side than darker away from the place, hole).In preferred embodiment, racket head top is provided with concave portions, this concave surface from no concave portions to concave portions smooth transition and increase are gradually arranged.

By utilizing the present invention, to compare with the racket of traditional same size, the area that the string pedestal increases 5-10% is possible.

Only by embodiment, illustrate below with reference to accompanying drawing:

Fig. 1 to 5 is the various possible cross sectional shapes according to racket of tennis (or badmintor) for match use racket head part of the present invention;

Fig. 6 has described in having utilized racket of the present invention, the difference between the actual string area A and the string area P of projection.

Fig. 7 has described the improved embodiment of the present invention, and wherein only the subregion of racket racket head is provided with concave cross section.

Essence of the present invention is the cross sectional shape that specifically defines through the racket head framework, and it is spill basically in some sense, and concave surface exists along the inner periphery of racket head framework, and the string 10 that promptly is in as shown in Figure 1 penetrates on the racket head frame facet of part.This concave surface can produce as Fig. 2, the different square shown in 3,4, rectangle or oval cross section and crescent basically cross section shown in Figure 5.

Use the production technology (this is well-known prior art) of up-to-date carbon fiber/epoxy resin synthetic to find that the geometrical factor of above-mentioned first section racket racket head of mentioning is not very important now, because carbon fiber/epoxy resin synthetic and other factor can provide high rigidity and high strength, so in this case, increasing the string area is a main design principle.The effect that increases the string area is to have improved " strength "-promptly of racket generation by hitting the ball speed that for example tennis produced.

Describe the increase of string area, as shown in Figure 6, need to do some definition.To understand the string area A of " reality " and the string area P of " projection " by accompanying drawing.Discovery is in racket racket head cross section:

\frac{A - P}{P}

This ratio is between 5 to 10%, but this should not be regarded as a kind of qualification.In other words, compare with the racket of tennis (or badmintor) for match use of traditional same size, the string area can increase 5-10%.

In preferred embodiment, concave portions is adopted expediently, and this part only is used to the part around the racket racket head, for example explains its position with dial plate, as shown in Figure 7 in the position of 9 points (label 40 places) to 3 points (label 30 places).

This has the effect of moving the active centre 20 of string pedestal towards the racket head top, because the strength that the string racket head increases is relevant with its center, the point that can produce peak power so is moved toward farther in racket handle.The racket head speed that racket generates partly relies on the rotation around the racket of grip region, so the point of peak power is moved to the point that improves linear velocity, thereby improves the result that the strength that generates is wished especially very much.

In Fig. 6 and Fig. 7, concave portions forms all or part of an independent continuous concave regions around the racket racket head.But this not necessarily also can obtain similar effect by a plurality of different concave regions (being that concave regions is formed on the part around the racket head framework) are provided.Remove this, or opposite, the concave regions of one or more prolongations is provided, local concave region might be provided, be spill so directly, and be the part spill or be not spill away from the zone of string around the zone on the inner periphery of the racket head framework of string.This result also allows string than the more large tracts of land vibration of other possible mode.

Fig. 1 to 5 has described the possible cross section of a pair of point that passes the racket head framework; But around the same cross sectional shape of the unnecessary formation of racket head framework.Concave portions can be done more significantly when the racket head framework extends or be very not remarkable, for example locates more significantly towards the summit (12 positions) of tennis racket, and that side (9 and 3 position) is located is not too remarkable.

Shown in Figure 7 is the preferred embodiment that is particularly suitable for using, concave surface is corresponding to 7 position cross section smooth transition in common (flat or protrude), increase to desired depth along clockwise direction around racket head framework concave surface, this degree of depth keeps around the bat frame top of the trellis, and finally becomes zero (revert to and do not have concave portions) 5 position from the desired depth minimizing.

The present invention is particularly useful for tennis racket, but also can be applied to other sporting racket, as squash and shuttlecock.

Claims

1. racket of tennis (or badmintor) for match use, this bat has racket head, is provided as the framework of string pedestal on the racket head, the string perforation is arranged on the racket head framework, in the string punched areas one concave cross section is arranged to small part bat frame frame, therefore when when racket is observed, the shared real area of string pedestal has exceeded its effective area.

2. racket of tennis (or badmintor) for match use as claimed in claim 1 is characterized in that the racket head framework is roughly square sectional except that concave regions.

3. racket of tennis (or badmintor) for match use as claimed in claim 1 is characterized in that the racket head framework is roughly the square-section except that concave regions.

4. racket of tennis (or badmintor) for match use as claimed in claim 1 is characterized in that the racket head framework is roughly oval cross section except that concave regions.

5. racket of tennis (or badmintor) for match use as claimed in claim 1 is characterized in that, the cross section that comprises concave regions racket head framework is crescent.

6. as the described racket of tennis (or badmintor) for match use of the arbitrary claim in front, it is characterized in that concave regions is provided with around whole bat frame frame.

7. as each described racket of tennis (or badmintor) for match use among the claim 1-5, it is characterized in that racket of tennis (or badmintor) for match use has the leader, concave regions is arranged on the part of the rightabout racket head of handle.

8. as the described racket of tennis (or badmintor) for match use of the arbitrary claim in front, it is characterized in that concave regions forms a single continuum.

9. as each described racket of tennis (or badmintor) for match use among the claim 1-5, it is characterized in that concave regions is formed at a plurality of different pieces of racket head framework.

10. as the described racket of tennis (or badmintor) for match use of the arbitrary claim in front, it is characterized in that described concave regions or each concave regions have a constant depth.

11., it is characterized in that described concave regions or each concave regions have a degree of depth as each described racket of tennis (or badmintor) for match use among the claim 1-9, it changes with the position around the racket head framework.

12. racket of tennis (or badmintor) for match use as claimed in claim 11 is characterized in that, the transitional region that concave surface reduces gradually is arranged between the remainder of the described concave regions part of racket head framework with concave regions or each concave regions part and racket head framework.

13. as claim 1-9, each described racket of tennis (or badmintor) for match use in 11 or 12 is characterized in that, should or each concave regions one degree of depth is arranged, this degree of depth is located to be greater than away from the hole around in the hole and is located.

14., it is characterized in that the real area of string pedestal exceeds the ratio of its effective area between 5% to 10% as the described racket of tennis (or badmintor) for match use of the arbitrary claim in front.