CN2154721Y

CN2154721Y - Tennis racket

Info

Publication number: CN2154721Y
Application number: CN92230729U
Authority: CN
Inventors: 陈谭勤莲
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-08-20
Filing date: 1992-08-20
Publication date: 1994-02-02
Anticipated expiration: 2002-08-20

Abstract

The utility model relates to a tennis racket. The cross section shape of a racket frame part forms a trilateral shape. The center of the outer periphery of the racket frame is the apex of the trilateral. The apex position is an inwardly dished slot. Wire holes are arranged on the inwardly dished slot for a screen wire to penetrate through, surround, and weave into a wire side. The racket frame of the structure can reduce manufacturing materials and can keep the strength of the racket frame.

Description

Tennis racket

The utility model is meant a kind of belfry of tennis racket especially relevant for a kind of racket.

Generally at the tennis racket square stance, netting twine batting moment the required tension force that bears very big, and wire side is to be around frame by netting twine to form, therefore the outer peripheral face of frame also equals directly to bear a pressure and tightens distortion when netting twine is stressed.The cross section that is general employing frame of racket in the prior art shown in Figure 1.When bearing a netting twine tension force 1 in the middle of the frame apical margin, its adjacent other position is subjected to a less pressure 2 simultaneously, and on two sides 3, do not bear any pressure and the tension force 1 concentrated central part that acts on, it is such therefore often to make frame form the collapse-deformation shape 4 as shown in phantom in Figure 1 of moment.Therefore pay much attention to the intensity of frame in the racquet design, otherwise racket can suffer permanent deformation or destruction, and conventional method is to increase its section thickness, or in establish reinforcement or change to adopt the material of higher-strength to achieve the goal, but cause thereupon that also racket weight increases, or make disadvantage such as cost increase.

The purpose of this utility model is to overcome the deficiency in the above-mentioned prior art.The frame Cross section Design that a kind of improvement is provided does not increase the weight and the cost of racket simultaneously to improve the new-type improvement racket of racket bearing strength.

Above-mentioned purpose realizes by following proposal.A kind of tennis racket, formed by shank and frame, the peripheral part cross sectional shape that it is characterized by this frame is a triangle, and the outer peripheral face central authorities of this frame are summits of this triangle, this vertex position then is the groove of an indent, and the line hole which is provided with predetermined number wears around to be woven into wire side for netting twine.

Below will design of the present utility model and purpose be further described with the embodiment that is combined with description of drawings.

Fig. 1 is a stressed schematic diagram on the racquet frame section in the prior art;

Fig. 2 is the stressed schematic diagram of general triangular-section;

Fig. 3 is the schematic diagram according to adoptable frame cross sectional shape of the present utility model;

Fig. 4 is the schematic diagram according to frame cross sectional shape after adoptable composite of the present utility model or the metal material moulding;

Fig. 5 is the utility model most preferred embodiment schematic cross-section;

Fig. 6 is the racket schematic perspective view that is combined with the effect of netting twine tension force.

(see figure 2) will be decomposed and be acted on downwards along dual-side when its summit in the triangular-section applies a downward load 5.Simultaneously, by the pressure effect of both sides and make the base be subjected to the effect of a tension force 7 to both sides.As seen, the effect of load 5 can not cause the inner collapse-deformation in this cross section by each limit institute balance burden in this cross section.

The belfry of the utility model frame of racket, its basic configuration promptly are the triangular shape structures that is combined by three end points, and wherein Fig. 3 (a) is depicted as the equilateral triangle structure at a right angle; 8 is right-angle side, and Fig. 3 (b) is depicted as the slightly cambered outwards arcwall face 9 in each limit, is the arcwall face 10 that slightly concaves then shown in Fig. 3 (c), and Fig. 3 (d) is the most preferred embodiment cross-sectional configuration.It is that summit place forms an indent groove 11 on the basis in Fig. 3 (b) cross section, and it serve as better with arcwall face or square, and can supply the suit guard strip.In the stress analysis of general section, learn, it not only has the strong point that garden arc cross sectional shape can meet with stresses scope advantage distributed more widely and a bit can bear big stress, but also be can bear a kind of moment impact stress and with this pressure distribution on cross-section structure and improve a kind of better cross section structure of its bearing strength.

The making material of general tennis racket is that composite is Overmolded or metal material pushes, casting, and generally be integrated structure, shown in Fig. 4 (a), be that the utility model adopts composite, the integrated structure of carbon fiber for example, Fig. 4 (b) then for using the metal extruding to form, wherein has integrated reinforcement to pull mouth in the inside of section, help intensity to increase.

Figure 5 illustrates and adopt cross sectional shape shown in Fig. 3 (d), wherein, provide wired hole 33 to base 32, for wearing of netting twine 34 around the wire side that is woven into a suitable intensity by the groove on the frame 30 31.Racket square stance, power general action are in wire side mid portion (see figure 6), and 34 pairs of frames of netting twine, 30 ring edge produce the pulling force T that concentrate a centre, and this situation is promptly pressed load as apply one on the groove 31 of frame outer peripheral face.And the superiority of the tool bearing strength aspect of cross section institute shown in Fig. 3 (d) as previously mentioned, construct according to different cross section that tennis racket of the present utility model adopts as can be known, not only on the relatively poor frame material of common intensity the advantage of improving frame intensity being arranged, on making, the effect that reduces with material can also be arranged, can make product reach light-weighted effect.

Claims

1, a kind of tennis racket, formed by shank and frame, the peripheral part cross sectional shape that it is characterized by this frame is a triangle, and the peripheral surface central authorities of this frame are summits of this triangle, one groove that is indent is then arranged on this vertex position, and the line hole which is provided with predetermined number wears around to be woven into wire side for netting twine.

2,, it is characterized by on the described frame composite and make according to the tennis racket of claim 1.

3,, it is characterized by described frame and make by metal material according to the tennis racket of claim 1.

4,, it is characterized by wherein said groove and be an arcwall face according to any tennis racket in the claim 1 to 3.

5,, it is characterized by the wherein said groove face that is square according to any tennis racket in the claim 1 to 3.

6, according to any tennis racket in the claim 1 to 3, the triangle that it is characterized by described frame cross section can be the evagination arc shape.