CN203139541U - Tennis racket - Google Patents

Abstract

The utility model relates to a sports equipment, specifically a tennis racket, which is characterized in that: there are 52 extension springs (5) on the racket frame (8), and there are ring hooks at both ends of the extension springs, connecting ring one and connecting ring 2. The racket frame is made of high-carbon alloy steel at one time. Turn the knob clockwise, and the screw on the knob will move outward along the threading hole of the racket frame. The elastic deformation distance of the tension spring will increase and connect with the tension spring. The racket string is tightened, the tension of the racket string becomes larger, the knob is rotated counterclockwise, the screw rod on the knob moves inward along the threading hole of the racket frame, the elastic deformation distance of the extension spring is shortened, and the racket string connected with the extension spring The tension on the racket is reduced, and by rotating the knob, the knob and the screw rod move relatively, so as to control the elasticity of the badminton racket at any time and improve the effect of training and competition.

Description

tennis racket

technical field

The utility model relates to the field of sports equipment, in particular to a tennis racket.

Background technique

Tennis is a beautiful and intense sport. The origin and development of tennis can be summed up in four sentences: It was conceived in France, born in England, began to popularize and form a climax in the United States, and now prevails all over the world. It is the second largest ball game in the world. Around 1885, tennis was introduced to China. After more than 100 years of development, the influence of tennis in China is gradually expanding. Origin, the second largest sport in the world. Modern tennis generally includes two forms of indoor tennis and outdoor tennis. Tennis is called a "gentleman's sport". It originated as a game played by French missionaries in the corridors of churches in the 12th and 13th centuries. It later became an indoor pastime and entertainment in the court. Some people also believe that the origin of tennis should be traced back to a ball game called Haiou de Baume that was circulated among the French folk before the "Hundred Years War" (1337-1453, the war between Britain and France). It is said that this kind of game is played by two people, each of them holds a racket, and there is a wall around the field. After the ball hits the wall, it is bounced back and then passes over the net. Therefore, it has many similarities with modern tennis in terms of the venue and equipment used, or the method of playing the game, so some people regard it as the original form of tennis. Tennis balls have a diameter between 6.541 and 6.858 cm. At first, tennis balls were only made of two hemispheres filled with grass, leaves or hair. Later, with the continuous development of tennis balls, the production of balls became more and more exquisite.

Racquets. Racquets that meet the following requirements are not allowed to be used in games played in accordance with these rules: the striking surface of the racquet shall be flat, and shall consist of strings attached to the frame of the racket to form a uniform rule. Where the strings cross, they shall are interweaved or combined with each other; the samples composed of clapped strings should be roughly consistent, and the density in the center should not be less than that in other areas. The design and stringing of the racquet should be such that the properties of the front and back of the racquet are roughly the same when the ball is struck. Beginning January 1, 1997, the total length of the racket frame (including the handle) used in professional play cannot exceed 27 inches (73.66 cm). Beginning January 1, 2000, the total length of the racket frame (including the handle) used in non-professional play must not exceed 27 inches (73.66 cm). Rackets, prior to this, were sent for use in non-professional games, with a maximum length of 32 inches (81.28 cm). The overall width of the frame must not exceed 12 1/2 inches (31.75 cm). The overall length of the stringing planes cannot exceed 15 1/2 inches (39.37 cm) and the overall width cannot exceed 11 1/2 inches (29.21 cm). The racket frame, including the handle, shall be free from appendages and devices, unless the appendage is only and very clearly used to limit and prevent racket wear, breakage, vibration or to adjust weight distribution, and its size and position It must also be reasonable.

Contents of the invention

In order to overcome the deficiencies in the prior art, the utility model provides a tennis racket. After the racket line 7 is tightened, it is tied to the connecting ring 2 6 of the extension spring 5. By rotating the knob 2, the knob 2 and the The relative movement of the screw rod 1 changes the tension of the racket string on the racket surface, thereby achieving the elasticity control of the tennis racket at any time.

The technical solution adopted by the utility model to solve the technical problems is: the tennis racket, which is characterized in that: 52 extension springs 5 are arranged on the racket frame 8, and a knob 2 is arranged on the screw rod 1, and the screw rod is threaded on the racket frame. Inside the hole 3, the screw mandrel 1 is connected to the connecting ring 1 of the extension spring 5, and the racket line 7 is tightened and tied to the connecting ring 2 6 of the extension spring 5, and the two ends of the extension spring 5 have ring hooks. , connecting ring one 4 and connecting ring two 6, the racket frame 8 is made of high carbon alloy steel by one-time forming.

Described tennis racket, because 52 extension springs 5 are arranged on the racket frame 8, so the elasticity of racket has strengthened greatly, and racket line 7 can directly select the thin steel wire of covering for use as racket line. Racket string 7 can also use Kevlar string, Kevlar is by far the most durable string material, this kind of material used in the racket craft, itself is very tough, it is the most durable compared to any other string A Durable Choice, Polyester Strings Polyester is another durable string material that wraps many fine nylon strings with a layer of polyethylene to give it a seamless look.

Said tennis racket has a knob 2 on the threaded mandrel 1, the threaded mandrel is inside the threading hole 3 of the racket frame, there is a penetrating hole on the threaded mandrel, and the connecting ring-4 at the other end of the extension spring 5 is hooked on the threaded mandrel. On the penetration hole of 1, the extension spring 5 is a coil spring that bears the axial tension, and the hooks are in the form of side hook extension spring, long hook extension spring, English hook extension spring, German hook extension spring, and semicircular hook extension spring , duckbill hook extension spring, etc., "hook" is used to ensure the tension source of the tension spring, generally made of spring steel with a circular cross-section material, when the load is not under load, the rings of the extension spring are generally There is no gap, and the rebound force (pull force) after stretching is used to control the movement of the parts, store energy, measure the size of the force, etc., and the tightness of the stretch spring coils. Its materials include stainless steel and piano steel. , high carbon steel, phosphor bronze, oil tempered alloy spring steel etc., the extension spring 5 two ends have ring hooks, and the racket line 7 is tightened and tied on the connecting ring 2 6 at the extension spring 5 one end, and the extension spring 5 The other end ring hook is hooked on the threaded mandrel 1 penetration hole of the knob 2 .

The beneficial effect of the utility model is: through the rotation of the knob 2, the knob 2 and the screw rod 1 are relatively moved to change the tension of the racket string on the racket surface, thereby achieving the elasticity of the tennis racket at any time and improving the training and competition. Effect.

Therefore the utility model has the following advantages: the sports equipment is simple in structure, easy to make, easy to popularize and popularize and use.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a partial cross-sectional schematic diagram of the utility model.

Fig. 2 is a schematic plan view of the utility model.

Fig. 3 is a schematic diagram of the three-dimensional structure of the utility model.

Among the figure: 1, screw mandrel, 2, knob, 3, racket frame threading hole, 4, connecting ring one, 5, extension spring, 6, connecting ring two, 7, racket line, 8, racket frame.

Detailed ways

The following are the best examples described in the utility model, which do not limit the scope of protection of the utility model.

Embodiment: With reference to Fig. 1 shown, described tennis racket, knob 2 is arranged on screw mandrel 1, and screw mandrel is inside racket frame threading hole 3, and there is a penetration hole on screw mandrel, and the connection circle of extension spring 5 Ring one 4 is hooked on the penetration hole of the screw rod 1, and the knob 2 is rotated clockwise. The screw rod 1 on the knob 2 moves outward along the threading hole of the racket frame, and the distance of the elastic deformation of the tension spring 5 becomes larger, which is different from the tension spring 5. The racket string 7 connected by the spring is tightened, and the tension of the racket string 7 becomes larger. When the knob 2 is rotated counterclockwise, the screw rod 1 on the knob 2 moves inward along the threading hole of the racket frame, and the elastic deformation distance of the tension spring 5 is shortened. , the tension on the racket line 7 connected with the extension spring decreases, and the rotation of the knob 2 causes the knob 2 to move relative to the screw mandrel 1, so as to control the elasticity of the badminton racket at any time and improve the effect of training and competition. Because 52 extension springs 5 are arranged on the racket frame 8, so the elasticity of racket has strengthened greatly, and racket line 7 can directly select the fine steel wire of covering for use as racket line. Racket string 7 can also use Kevlar string, Kevlar is by far the most durable string material, this kind of material used in the racket craft, itself is very tough, it is the most durable compared to any other string A Durable Choice, Polyester Strings Polyester is another durable string material that wraps many fine nylon strings with a layer of polyethylene to give it a seamless look.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the above-mentioned embodiment, and any other changes, modifications and substitutions made without departing from the spirit and principle of the present utility model , combination, and simplification, all should be equivalent replacement methods, and are all included in the protection scope of the present utility model. The parts not described in detail in the utility model are known technologies.

Claims (1)

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.

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