CN203139541U

CN203139541U - Tennis racket

Info

Publication number: CN203139541U
Application number: CN2013200723001U
Authority: CN
Inventors: 苟小平; 苟江乐; 苟江宝
Original assignee: Longdong University
Current assignee: Longdong University
Priority date: 2013-02-12
Filing date: 2013-02-12
Publication date: 2013-08-21
Anticipated expiration: 2023-02-12

Abstract

The utility model relates to a sports instrument, in particular to a tennis racket which is characterized in that fifty-two tension springs (5) are arranged on a racket framework (8), and annular hooks, first connection rings and second connection rings are arranged at two ends of each tension spring. The racket framework is formed by high-carbon alloy steel through once forming. When a knob is rotated clockwise, a lead screw arranged on the knob moves outwards along a threading hole of the bracket framework, the elastic deforming distance of the tension springs is lengthened, bracket lines connected with the tension springs are tensioned, and tension of the bracket lines is increased. When the knob is rotated anticlockwise, the lead screw arranged on the knob moves inwards along the threading hole of the bracket framework, the elastic deforming distance of the tension springs is shortened, and tension of the bracket lines connected with the tension springs is decreased. The knob and the lead screw have relative moving through rotating of the knob, and therefore elasticity of a badminton racket can be controlled at any time and the training and match effects can be improved.

Description

Tennis racket

Technical field

The utility model relates to a kind of sports equipment field, is specially tennis racket.

Background technology

Tennis (Tennis) is a grace and fierce motion, the origin and the development of tennis can be summarized with four words: breed in France, be born in Britain, begin to popularize and form climax in the U.S., the whole world now in vogue is called as second-biggest-in-the-world ball game.Before and after 1885, China is imported in tennis into, and through 100 years of development, tennis progressively enlarges in the influence of China.Origin, second-biggest-in-the-world motion.Modern tennis generally comprises court tennis and two kinds of forms of outdoor tennis.Tennis is called as " gentleman's motion ", originates from a kind of recreation that 12nd to 13 century France missionary bats the ball in the claustra of church the earliest.Became a kind of indoor recreation and amusement activity in the imperial palace afterwards.Also the someone thinks, the ball game of a kind of Hai Oudebawumai of being named as that the origin of tennis should be traced back to before " the Hundred Year's War " (～Great Britain and France two countries in 1453 in 1337 war) at French folklore.It is said that this recreation is that two people carry out, everyone respectively holds a racket, has built enclosure wall around the court, and ball is rebounded after bumping against on the wall, then crosses net.Therefore, no matter on the place and utensil of using, still on the method for playing, it and modern tennis have many similarities, so there is the people that it is regarded as the form originally of tennis.The diameter of tennis is between 6.541 and 6.858 centimeters.Originally tennis, just two hemisphere filling grass, leaf or hairs etc. are made, and afterwards along with the continuous development of tennis, the making of ball is also more and more exquisite.

Racket, the racket that meets the following requirements does not allow to be used in the match of carrying out according to this rule: the striking surface of racket should be smooth, form uniform rules by the bat string that is connected on the racquet frame, clap string and should be interweaved or mutually combine in the place that intersects; The sample that the bat string is formed should be unanimous on the whole, and the density of central authorities especially can not be less than other regional density.The design of racket and wear string the positive and negative both sides of racket are consistent substantially in square stance character.From on January 1st, 1997, the total length (comprising handle) of the frame of racket that uses in the occupation match can not surpass 27 inches (73.66 centimetres).From on January 1st, 2000, the total length of the frame of racket that uses in non-professional match (comprising handle) can not surpass 27 inches (73.66 centimetres).Racket, before this, use is sent in non-professional match, and the maximum length of racket is 32 inches (81.28 centimetres).The overall width of frame can not surpass 12 and 1/2 inches (31.75 centimetres).The total length of wearing the string plane can not surpass 15 and 1/2 inches (39.37 centimetres), and overall width can not surpass 11 and 1/2 inches (29.21 centimetres).Frame, comprise that handle all can not have adjunct and device, unless this adjunct only and very clear and definite being used for limit and prevent that racket from wearing and tearing, break, vibrate or being used for to adjust distribution of weight, and its size and position also must be rational.

Summary of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a kind of tennis racket, fasten on the connection annulus 26 of extension spring 5 after racket string 7 tensions, by to the rotation on the knob 2, make knob 2 with screw mandrel 1 relative movement take place, change the tension force of face racket string, thereby reach the elasticity of controlling tennis racket at any time.

The technical scheme that its technical problem that solves the utility model adopts is: described tennis racket, it is characterized in that: 52 extension springs 5 are arranged on the racket frame 8, at screw mandrel 1 knob 2 is arranged, screw mandrel is in the inside of racquet frame through wires hole 3, screw mandrel 1 is connected on the connection annulus 1 of extension spring 5, fastens on the connection annulus 26 of extension spring 5 after racket string 7 tensions, and there is loop-hook at extension spring 5 two ends, connect annulus 1 and be connected annulus 26, racket frame 8 is to be made by the high-carbon alloy steel one-shot forming.

Described tennis racket, owing on the racket frame 8 52 extension springs 5 are arranged, so the elasticity of racket has strengthened greatly, racket string 7 can directly select for use the finer wire of encapsulate as racket string.Racket string 7 also can be selected the Ke Weila string for use, up to the present the gram Wella is the most durable ball chord material, this material that is used in the racket technology, itself is very tough and tensile, contrasting other any ball lines all is the most durable selection, polyester string polyester is another durable ball chord material, and it superscribes the layer of polyethylene material outside the thin string of many nylon, make it one integrated mass.

Described tennis racket, at screw mandrel 1 knob 2 is arranged, screw mandrel is in the inside of racquet frame through wires hole 3, a through hole is arranged on the screw mandrel, the connection annulus 1 of extension spring 5 other ends is hooked on the through hole of screw mandrel 1, extension spring 5 is the helical springs that bear axial tension, the form of its hook has the extension spring of side hook, long hook extension spring, English hook extension spring, the extension spring of moral formula hook, the extension spring of semicircle hook, duckbilled hook extension spring etc., " hook " is the pulling force source that guarantees extension spring, generally make with circular section material spring steel, when not bearing load, between the circle of extension spring and the circle generally all be and tightly very close to each other, utilize screen resilience (pulling force) work after stretching, in order to control the motion of parts, the storage or saving energy, the size of ergometry etc., the tightness degree of extension spring coiling, its material has stainless steel, the qin steel, high-carbon steel, phosphor-copper, oil-temper alloy spring steel etc., there is loop-hook at extension spring 5 two ends, fasten on the connection annulus 26 of extension spring 5 one ends after racket string 7 tensions, extension spring 5 other end loop-hooks are hooked on screw mandrel 1 through hole of knob 2.

The beneficial effects of the utility model are: by to the rotation on the knob 2, make knob 2 with screw mandrel 1 relative movement take place, change the tension force of face racket string, thereby reach the elasticity of controlling tennis racket at any time, improve the effect of training and competition.

Therefore the utlity model has following advantage: this physical culture equipment is simple in structure, and is easy to make, popularizes use easily.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is partial cutaway schematic of the present utility model.

Fig. 2 is planar structure schematic diagram of the present utility model.

Fig. 3 is perspective view of the present utility model.

Among the figure: 1, screw mandrel, 2, knob, 3, the racquet frame through wires hole, 4, connect annulus one, 5, extension spring, 6, connect annulus two, 7, racket string, 8, racket frame.

The specific embodiment

Below be preferred example described in the utility model, therefore do not limit protection domain of the present utility model.

Embodiment: with reference to shown in Figure 1, described tennis racket, at screw mandrel 1 knob 2 is arranged, screw mandrel is in the inside of racquet frame through wires hole 3, a through hole is arranged on the screw mandrel, the connection annulus 1 of extension spring 5 is hooked on the through hole of screw mandrel 1, the knob 2 that turns clockwise, the screw mandrel 1 on the knob 2 is outwards mobile along the through wires hole of racket frame, and extension spring 5 elastically-deformable distances become big, the racket string 7 that is connected with extension spring is tightened up, it is big that the tension force of racket string 7 becomes, and is rotated counterclockwise knob 2, and the screw mandrel 1 on the knob 2 moves inward along the through wires hole of racket frame, extension spring 5 elastically-deformable distances shorten, tension force on the racket string 7 that is connected with extension spring reduces, and by the rotation to knob 2, makes knob 2 with screw mandrel 1 relative movement take place, thereby reach the elasticity of controlling badminton racquet at any time, improve the effect of training and competition.Because on the racket frame 8 52 extension springs 5 are arranged, so the elasticity of racket has strengthened greatly, racket string 7 can directly select for use the finer wire of encapsulate as racket string.Racket string 7 also can be selected the Ke Weila string for use, up to the present the gram Wella is the most durable ball chord material, this material that is used in the racket technology, itself is very tough and tensile, contrasting other any ball lines all is the most durable selection, polyester string polyester is another durable ball chord material, and it superscribes the layer of polyethylene material outside the thin string of many nylon, make it one integrated mass.

Above-described embodiment is the utility model preferred implementation; but embodiment of the present utility model is not restricted to the described embodiments; other any do not deviate from change, the modification done under spiritual essence of the present utility model and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within the protection domain of the present utility model.The utility model not part of detailed description is known technology.

Claims

1. tennis racket, by screw mandrel (1), knob (2), racquet frame through wires hole (3), connect annulus one (4), extension spring (5), connect annulus two (6), racket string (7) and racket frame (8) constitute, described tennis racket, it is characterized in that: 52 extension springs (5) are arranged on the racket frame (8), at screw mandrel (1) knob (2) is arranged, screw mandrel is in the inside of racquet frame through wires hole (3), screw mandrel (1) is connected on the connection annulus one (4) of extension spring (5), fasten on the connection annulus two (6) of extension spring (5) after racket string (7) tension, there is loop-hook at extension spring (5) two ends, connect annulus one (4) and be connected annulus two (6), racket frame (8) is to be made by the high-carbon alloy steel one-shot forming.