CN114272578A - Table tennis bat capable of changing friction coefficient of striking surface - Google Patents

Abstract

A table tennis racket capable of changing the friction coefficient of the hitting surface, comprising a bottom plate, a closed ring, a gas nozzle, an airbag seat and a spring; it is characterized in that the upper end of the bottom plate is provided with handles on both sides, and the lower end of the handle is provided with a positioning groove; An airbag seat is arranged in the groove, and the airbag head on the airbag seat is exposed outside the positioning groove; a sponge glue is arranged on the same side as the positioning groove under the bottom plate, a rubber leather bottom is arranged on the sponge glue, and a granular glue is arranged on the upper surface of the rubber leather bottom. A soft rubber skin is arranged between the granules, and the granules protrude out of the soft rubber; a soft rubber cavity is formed between the soft rubber and the rubber bottom; the rubber bottom and the soft rubber are provided with a sealing ring at the position aligned with the edge of the sponge rubber to seal The ring does not allow the gas in the soft rubber cavity to communicate with the outside world. The invention utilizes air pressure to change the friction force of the table tennis racket, and can achieve unexpected effects in the game.

Description

A table tennis racket that can change the friction coefficient of the hitting surface

technical field

The invention relates to the field of sports equipment, in particular to a table tennis racket capable of changing the friction coefficient of the hitting surface.

Background technique

Table tennis is a mass sport in my country. In order to improve the level of table tennis in our country, the training of beginners is very important. Rubber is divided into positive rubber, reverse rubber and long rubber. Its selection and play are inseparable. The positive granules face outward, the ball is more stable and fast, and it can also cause a certain amount of rotation, and it is not easy to eat and spin, which is suitable for close-to-table fast-attack play. The anti-grain rubber faces inward, the smooth side faces outward, with high viscosity and high friction, and it is easy to cause strong rotation. The long glue also has particles facing outward, but its particles are long and soft, and the rotation changes strangely. Generally, the rotation intensity of the returning ball is determined by the incoming ball, and the opposite rotation is generated, which makes it difficult for the opponent to adapt. The user must have comprehensive skills and Variety of play.

The ITTF stipulates that the table tennis rackets of the participating players must be set to be black on one side and red on the other side, so that the opponent can judge the change of the material according to the color, and the two sides can judge the characteristics of each other's balls and make different counterattacks. Fairness of the game.

In the actual game, some athletes keep falling down during the game, just to let the opponent achieve unexpected attack effect in the case of wrong judgment; if you don't fall down, you can also change the friction coefficient of the racket, which can definitely increase The odds of winning can also add to the fun of the game.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the present invention provides a table tennis racket capable of changing the friction coefficient of the hitting surface.

The technical scheme adopted by the present invention is as follows: a table tennis racket capable of changing the friction coefficient of the hitting surface, comprising a bottom plate, a closed ring, a gas nozzle, an airbag seat, and a spring; the upper end of the bottom plate is provided with handles on both sides, and the lower end of the handle is provided with a handle Positioning groove; an airbag seat is arranged in the positioning groove, and the airbag head on the airbag seat is exposed outside the positioning groove; the same side as the positioning groove is provided with sponge glue under the bottom plate, the sponge glue is provided with a rubber bottom, and the upper part of the rubber bottom is provided There is granular glue, a soft rubber skin is arranged between the granular glues, and the granular glue protrudes outside the soft rubber skin; a soft rubber skin cavity is formed between the soft rubber skin and the rubber skin bottom; The closed ring does not allow the gas in the soft rubber cavity to communicate with the outside world; the top of the bottom plate is provided with a gas nozzle, an upper trachea is arranged under the gas nozzle, and a one-way valve is arranged under the upper trachea, and the one-way valve passes through the trachea and the airbag The one-way valve only allows the gas to enter the airbag seat from the air nozzle; the airbag seat is connected to the soft rubber cavity through the lower trachea; the airbag seat is provided with an airbag cavity, and a second limit ring set at the head and tail ends of the airbag The first limit ring set at the front end of the airbag seat is restricted from sliding in the airbag cavity, and the second limit ring and the inner wall of the airbag cavity are coated with sealing grease, which can prevent the gas in the airbag cavity from facing outward when the airbag head is squeezed. Leakage; the top of the airbag head is provided with a pressing cover of hard material, the bottom of the pressing cover is in contact with the top of the spring, and the lower end of the spring is in contact with the bottom surface of the airbag cavity; when there is no external force, the spring always moves the airbag head away from the airbag The direction of the bottom of the cavity is pushed away.

The spring groove can completely accommodate the squeezed spring, and the bottom of the airbag head can completely contact the bottom surface of the airbag cavity when the airbag head is squeezed; when the airbag head is squeezed, the air in the airbag cavity enters the soft rubber cavity through the lower trachea , after the air in the air bag cavity enters the cavity of the soft rubber skin, it forces the soft rubber skin to bulge outwards.

Give up the extrusion of the air bag head, the air bag head will quickly reset under the dual action of the spring force and the reset function of the soft rubber skin, the air entering the soft rubber skin cavity will quickly flow back into the air bag cavity, and the soft rubber skin will also quickly reset, no longer bulge.

The air nozzle can only inject air into the air bag cavity, and under the action of the one-way valve, the air in the air bag cavity cannot be discharged toward the air nozzle.

Adopting the technical scheme of the present invention has the following beneficial effects:

1) The present invention changes the friction force of the table tennis racket by instantly changing the air pressure in the soft rubber cavity. The user can easily control the head of the air bag with fingers, and can play table tennis balls with different strengths and degrees of rotation. Can achieve amazing results.

2) During the game, the user can press or give up the pressure on the airbag head at any time with his fingers, so that the air pressure in the soft rubber cavity can be changed, and the purpose of controlling the friction coefficient of the ball surface of the table tennis racket can be conveniently, quickly and secretly controlled.

Description of drawings

Fig. 1 is the perspective view of the present invention;

Fig. 2 is the internal structure schematic diagram of the present invention;

Figure 3 is an enlarged view of the sectional structure of the present invention at A (the state where the air pressure in the soft rubber cavity is the same as the outside);

Figure 4 is an enlarged view of the cross-sectional structure of the present invention at A (pressing the air bag head to force the air in the air bag cavity into the soft rubber skin cavity, the air pressure in the soft rubber skin cavity is greater than the outside air pressure, so that the soft rubber skin faces outwards raised state);

5 is a schematic structural diagram of the airbag seat of the present invention (the state when the airbag head is not pressed);

FIG. 6 is a schematic diagram of the structure of the airbag seat of the present invention (the state when the airbag head is pressed and the air in the airbag cavity is squeezed out);

In the figure: bottom plate 10, handle 11, positioning groove 12, sponge glue 13, sealing ring 20, granular glue 21, soft rubber skin 22, rubber skin bottom 23, soft rubber skin cavity 24, air nozzle 30, upper air pipe 31, one-way valve 32. Lower air pipe 33, air bag seat 40, air bag head 41, pressing cover 42, first limit ring 43, second limit ring 44, spring groove 45, air bag head bottom 46, air bag cavity 47, spring 50.

Detailed ways

As shown in FIG. 1 to FIG. 6, a table tennis racket capable of changing the friction coefficient of the hitting surface includes a bottom plate 10, a closed ring 20, a gas nozzle 30, an air bag seat 40, and a spring 50; the upper end of the bottom plate 10 is provided on both sides with The handle 11, the lower end of the handle 11 is provided with a positioning groove 12; the positioning groove 12 is provided with an airbag seat 40, and the airbag head 41 on the airbag seat 40 is exposed outside the positioning groove 12; the bottom plate 10 is provided on the same side as the positioning groove 12 There is sponge glue 13, the sponge glue 13 is provided with a rubber bottom 23, the top of the rubber bottom 23 is provided with granular glue 21, a soft rubber skin 22 is arranged between the granular glue 21, and the granular glue 21 protrudes outside the soft rubber skin 22; A soft rubber cavity 24 is formed between 22 and the rubber bottom 23; the rubber bottom 23 and the soft rubber 22 are provided with a closed ring 20 at the position aligned with the edge of the sponge rubber 13, and the closed ring 20 does not allow the gas in the soft rubber cavity 24 to interact with External communication; the top of the bottom plate 10 is provided with a gas nozzle 30, an upper gas pipe 31 is provided under the gas nozzle 30, a one-way valve 32 is provided under the upper gas pipe 31, the one-way valve 32 is connected to the airbag seat 40 through the gas pipe, and the one-way valve 32 Only the gas is allowed to enter the airbag seat 40 from the air nozzle 30; the airbag seat 40 is communicated with the soft rubber cavity 24 through the lower air pipe 33; The position ring 44 is constrained to slide in the air bag cavity 47 by the first limit ring 43 provided at the front end of the air bag seat 40 , and the second limit ring 44 and the inner wall of the air bag cavity 47 are coated with sealing grease, which can prevent the air bag head 41 from being squeezed. When the airbag cavity 47 is pressed, the gas in the airbag cavity 47 leaks outward; the top of the airbag head 41 is provided with a pressing cover 42 made of hard material, the bottom of the pressing cover 42 is in contact with the top end of the spring 50, and the lower end of the spring 50 is in contact with the bottom surface of the airbag cavity 47 Contact; when there is no external force, the spring 50 always pushes the airbag head 41 away from the bottom of the airbag cavity 47 .

The spring groove 45 can completely accommodate the squeezed spring 50, and the bottom 46 of the airbag head can completely contact the bottom surface of the airbag cavity 47 when the airbag head 41 is squeezed; when the airbag head 41 is squeezed, the air in the airbag cavity 47 passes through the lower trachea 33 Entering into the soft rubber cavity 24, after the air in the air bag cavity 47 enters into the soft rubber skin cavity 24, the soft rubber skin 22 is forced to bulge outward, and when the bottom of the air bag head 41 is squeezed, it can completely contact the air bag cavity 47. On the bottom surface, the soft rubber skin 22 protrudes beyond the granular rubber 21 .

Give up the squeezing of the airbag head 41, the airbag head 41 will quickly reset under the dual action of the elastic force of the spring 50 and the reset function of the soft rubber skin 22, and the air entering the soft rubber skin cavity 24 will quickly flow back to the airbag cavity 47, and the soft The rubber skin 22 is also quickly reset, and no longer protrudes beyond the granular rubber 21 .

The air nozzle 30 can only inject air into the air bag cavity 47 , and under the action of the one-way valve 32 , the air in the air bag cavity 47 cannot be discharged toward the air nozzle 30 .

The friction coefficient of the surface of the granular rubber (21) is smaller than that of the soft rubber (22) surface, and there is an obvious difference.

The bulge and reset of the soft rubber 22 is achieved by pressing the airbag head 41 with the user's finger, and the change of the friction force of the hitting surface is related to the state of the bulge of the soft rubber 22 .

The invention changes the friction force of the table tennis racket by instantly changing the air pressure in the soft rubber skin cavity. Whether the user holds the racket straight or horizontally, the user can conveniently control the head of the air bag with his fingers to play table tennis balls with different strengths and degrees of rotation. , and can conveniently, quickly and secretly control the purpose of the friction coefficient of the ball surface of the table tennis racket.

The above-mentioned embodiments of the present invention are intended to illustrate typical embodiments of the present invention, rather than limit the embodiments of the present invention. Obvious changes derived from the prompts in the embodiments of the present invention are still within the protection scope of the present invention.

Claims (6)

1. A table tennis bat capable of changing the friction coefficient of a hitting surface comprises a bottom plate (10), a closed ring (20), an air tap (30), an air bag seat (40) and a spring (50); the novel multifunctional electric heating cooker is characterized in that handles (11) are arranged on two sides of the upper end of the bottom plate (10), and positioning grooves (12) are formed in the lower ends of the handles (11); an air bag seat (40) is arranged in the positioning groove (12), and an air bag head (41) on the air bag seat (40) is exposed out of the positioning groove (12); the bottom plate (10) below the handle (11) is provided with sponge rubber (13), the sponge rubber (13) is provided with a rubber sole (23), the rubber sole (23) is provided with granular rubber (21), soft rubber (22) is arranged between the granular rubber (21), and the granular rubber (21) protrudes out of the soft rubber (22); a soft rubber cavity (24) is formed between the soft rubber (22) and the rubber bottom (23); the rubber sole (23) and the soft rubber (22) are provided with a sealing ring (20) at the position aligned with the edge of the sponge rubber (13), and the sealing ring (20) does not allow the gas in the soft rubber cavity (24) to be communicated with the outside; the top of the bottom plate (10) is provided with an air tap (30), an upper air pipe (31) is arranged below the air tap (30), a one-way valve (32) is arranged below the upper air pipe (31), the one-way valve (32) is connected with the air bag seat (40) through an air pipe, and the one-way valve (32) only allows air to enter the air bag seat (40) from the air tap (30); the air bag seat (40) is communicated with the soft rubber hollow cavity (24) through the lower air pipe (33); an air bag cavity (47) is arranged in the air bag seat (40), a second limiting ring (44) arranged at the tail end of the air bag head (41) is limited by a first limiting ring (43) arranged at the front end of the air bag seat (40) to slide in the air bag cavity (47), and sealing lubricating grease is coated between the second limiting ring (44) and the inner wall of the air bag cavity (47), so that when the air bag head (41) is squeezed, the gas in the air bag cavity (47) can be prevented from leaking outwards; the top of the air bag head (41) is provided with a hard material pressing cover (42), the lower surface of the pressing cover (42) is contacted with the top end of a spring (50), and the lower end of the spring (50) is contacted with the bottom surface of the air bag cavity (47); when no external force is applied, the spring (50) always pushes the air bag head (41) away in the direction away from the bottom of the air bag cavity (47).

2. A table tennis bat with a changeable coefficient of friction on the striking face according to claim 1, wherein the spring groove (45) is capable of fully accommodating the compressed spring (50) and the bottom of the air bag head (41) is capable of fully contacting the bottom surface of the air bag chamber (47) when compressed.

3. The table tennis bat capable of changing the friction coefficient of a hitting surface according to claim 1, wherein when the air bag head (41) is pressed, air in the air bag cavity (47) enters the soft rubber cavity (24) through the lower air pipe (33), after the air in the air bag cavity (47) enters the soft rubber cavity (24), the soft rubber (22) is forced to bulge outwards, and when the air bag head (41) is pressed until the bottom of the air bag head is contacted with the ground of the air bag cavity (47), the soft rubber (22) bulges outwards beyond the granular rubber (21).

4. A table tennis bat with a changeable coefficient of friction on the hitting surface according to claim 3, wherein the air bag head (41) is released from the squeezing, the air bag head (41) is rapidly restored under the dual actions of the elastic force of the spring (50) and the restoring function of the soft rubber (22), the air entering the soft rubber cavity (24) rapidly returns to the air bag cavity (47), and the soft rubber (22) is rapidly restored and does not protrude beyond the granular rubber (21).

5. A table tennis bat with a changeable coefficient of friction on the striking face according to claim 1, wherein the air nozzle (30) is capable of injecting air into the air bladder cavity (47) under the influence of the one-way valve (32), but the air in the air bladder cavity (47) is not capable of passing back through the one-way valve (32).

6. A table tennis bat with a changeable coefficient of friction on the striking face according to claim 1, wherein the coefficient of friction on the surface of the particle rubber (21) is smaller and significantly different than the coefficient of friction on the surface of the soft rubber (22).

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