CN115888044A - Table tennis bat - Google Patents

Abstract

A table tennis bat is characterized in that the bat neck and the bat handle are in shapes, the bat neck is connected with a batting board surface like a horn mouth, and the horn tail is in a horn shape connected with an upper handle strip, namely, the width gradually narrows from the batting board shoulder to the middle end of a lower handle strip of the bat handle; the upper handle strip of the racket handle is shorter than the lower handle strip, the length of the upper handle strip is about two thirds of the length of the lower handle strip, the middle rear part of the upper handle strip is thick, the front end of the upper handle strip is thin, the front end of the upper handle strip is narrower than the horn-shaped racket neck, and the whole upper handle strip is in a wedge shape; the front end of a lower handle strip of the racket handle extends into the racket neck, the rear end of the lower handle strip is thicker, and the thickness of the front end and the middle part of the lower handle strip is equivalent to that of the sponge and the rubber adhered to the lower surface of the bottom plate; the upper handle strip and the lower handle strip of the racket handle are bilaterally symmetrical along the central axis, are thick close to the central axis and are thin on two sides, the upper handle strip and the lower handle strip are asymmetrical to the bottom plate, the racket handle is narrowest in the middle of the lower handle strip, and the surfaces of the handle strips are curved surfaces. The racket can be inverted, the short racket handle is opposite to the tiger mouth, and the racket is compatible with the advantages of the traditional straight racket; the long racket handle is opposite to the tiger's mouth, so that the racket is smooth and comfortable to hold and is convenient to regulate and control the racket face to exert sufficient force.

Description

Table tennis bat

A, the technical field

The invention relates to a table tennis bat.

Second, background Art

The table tennis bat includes traditional bat in China, square bat in Japan and Korea, transverse bat and other novel bat. The traditional pen-hold table tennis bat in China consists of a batting board and a bat handle, wherein the bat handle consists of a handle which is made into a whole with a bottom board and handle bars which are respectively stuck on the upper surface and the lower surface of the handle, the cross section of the bat handle is oval, the thickness of the front end of the bat handle is smaller than that of the tail end of the bat handle, the shapes of the upper handle bar and the lower handle bar are the same and are symmetrical relative to the central plane of the bottom board, in the era that the table tennis adopts a small ball with the diameter of 38mm, the batting method of using the bat to push left and right has brilliant battle in international competitions, a great amount of bat exists in the market at present, and a plurality of table tennis enthusiasts use the table tennis bat, after the table tennis is changed into a large ball with the diameter of 40mm from 2000,the diameter of the table tennis is increased by about 5.3%, the volume is increased by about 18%, and the mass of the table tennis is changed from 2.5g to 2.7g, which is increased by 8%; the formula of the moment of inertia of the spherical shell with uniformly distributed mass is J = (2/3) mR ² Therefore, the moment of inertia of the table tennis is increased by more than 20% after the table tennis is changed from the small ball to the large ball, and even if the large ball played by people only needs to maintain the speed and the rotation of the small ball, more translation kinetic energy and rotation kinetic energy need to be provided for the table tennis, namely, more work needs to be done on the table tennis in the hitting process. As the moment of inertia of the table tennis increases more, it becomes more difficult to make and change the spin of the ball. After a big ball is changed, on one hand, the speed of the table tennis when coming out of the hand is not as high as that of a small ball, and meanwhile, because the air resistance of the table tennis is increased when the table tennis flies in the air, the flying speed of the ball is reduced, so the playing rhythm is reduced, people must play faster, more accurately, more fiercely, more strongly and more rotatably, and more wonderful playing can win a game; the square penhold in Japan and Korea seems to play well, but the shape of the racket hand and the racket is rigid, the racket surface is not flexible to adjust, the playing technology is simple, and players holding the racket to play rarely can reach the peak level of the table tennis; in the big ball era of table tennis, the transverse bat has better force application by the positive and negative hands, large caring surface and strong holding and resisting capability, and is in a relatively dominant position at present, but the transverse bat is inflexible in the table, the middle path is weaker, and the time is needed for inverting the bat surface in the positive and negative positions; in recent years, a plurality of novel table tennis bats appear, and certain specific playing methods are probably suitable, but the requirements of the table tennis sport big ball times can not be satisfied; what is the need of the table tennis big age? Need we can play the table tennis more accurately, faster, more fiercely, rotate stronger, change more, more wonderful and beautifulThe table tennis bat is established on the basis of scientific and accurate knowledge of objective rules of table tennis motion, the track of the table tennis in the air under the action of gravity is basically a parabola, and the table tennis bat integrally moves horizontally along with the mass center and also rotates; the mass m and the acceleration a of the mass center of the table tennis ball and the resultant force F of the gravity, the elastic force and the friction force of the table tennis ball obey Newton's second law F = ma, the magnitude direction and the acting time of the resultant force acting on the table tennis ball determine the change of the magnitude direction of the translational velocity, namely the velocity of the table tennis ball is determined by the initial velocity, the magnitude direction and the acting time of the resultant force; the moment of inertia J and angular acceleration beta of the table tennis to the rotating shaft passing through the mass center and the moment M of the friction force obey the rotation law M = Jbeta, and the moment and the acting time determine the change of the angular speed, namely the angular speed of the rotation of the played table tennis is determined by the initial angular speed, the size direction of the received moment and the acting time; when the table tennis is handled or manufactured to rotate, the table tennis rolls on the bat surface without sliding, the friction between the table tennis and the bat surface is static friction, the magnitude of the static friction is variable between 0 and the maximum static friction, and people must correctly understand the mechanics knowledge in the table tennis motion and consciously apply the mechanics law followed by the table tennis motion to play the table tennis.

Third, the invention

The invention relates to a table tennis bat, which is a bat for playing table tennis and consists of a ball hitting board, a bat neck and a bat handle, wherein the bat neck and the bat handle are basically in an oval shape, the bat neck is connected with a ball hitting board surface like a horn mouth, and the horn tail is connected with an upper handle strip in a horn shape, namely the middle end of the lower handle strip of the bat handle gradually narrows from the shoulder of the ball hitting board to the middle end of the bat handle; the upper handle strip of the racket handle is shorter than the lower handle strip, the length of the upper handle strip is about two thirds of the length of the lower handle strip, the middle rear part of the upper handle strip is thick, the front end of the upper handle strip is thin, the front end of the upper handle strip is narrower than the horn-shaped racket neck, and the whole upper handle strip is in a wedge shape; the front end of a lower handle strip of the racket handle extends into the inside of the racket neck, the rear end of the lower handle strip is thicker, and the thicknesses of the front end and the middle part of the lower handle strip are equivalent to those of the sponge and the rubber adhered to the lower surface of the bottom plate; the upper handle strip and the lower handle strip of the racket handle are bilaterally symmetrical along the central axis, are thick close to the central axis and are thin on two sides, the upper handle strip and the lower handle strip are asymmetrical to the bottom plate, the racket handle is narrowest in the middle of the lower handle strip, and the surfaces of the handle strips are curved surfaces.

The table tennis bat can be used by inverting two sides, and when the shorter side of the bat handle is over against the holding method of holding the tiger mouth and the palm of the bat hand, the table tennis bat is equivalent to the table tennis bat played by using the traditional straight bat; when the longer side of the racket handle is over against the thumb mouth and palm of the racket, the thumb and the forefinger clamp the racket neck, the middle finger is directly attached to the racket face along the racket handle, and the ring finger and the little finger can lean against the racket neck and the edge of the racket shoulder, so that the racket is comfortable and has good hand feeling, and the racket face is pried to move greatly by controlling the motion of the smaller racket neck part to form an amplification effect, so that the racket face has better matching effect on the racket face for a large table tennis ball of 40 mm; the traditional transverse bat has the advantages that the forefinger is obliquely attached to the surface of the bat, the holding bat is stiff and not sensitive enough, and the technical conversion is slow; the striking face of the table tennis bat is naturally and properly extended, and the table tennis bat is used for playing balls, because the middle finger is matched with the height of the bat face, the force application direction of the hand is directly consistent with the direction of the actual acting force of the bat on the ball, so that an included angle which is always formed between the force application direction of the traditional straight-patting player and the direction of the acting force of the bat face on the ball is practically eliminated, and the system error is eliminated theoretically, so that the advanced concept of design and the comprehension of repeated actual combat are realized, and the accuracy of playing the balls is improved; because the hitting board and the arm are on the same straight line when the racket is naturally held, the 'whipping effect' is conveniently utilized to fully exert force, so that the hit ball is more powerful; the ring finger can boost the bat surface to swing in a tangential acceleration manner, so that the rotation of the ball is enhanced; in the era that a table tennis uses a big ball with the diameter of 40mm, only one middle finger can extend into the back of the racket when the racket is used for playing, the ring finger and the little finger naturally lean against the edge of the racket shoulder and the racket neck, and the racket is more scientific and reasonable than a holding method that one forefinger obliquely extends into the racket face by being held transversely, the racket face is adjusted quickly and flexibly, the racket is spread and unfolded smoothly, the technical quality of various batting is improved, the conversion of different technical actions is facilitated, the synthesis and the application of various technologies in real time are facilitated, and the overall attack and defense capacity is enhanced; the table tennis bat of the invention is obviously superior to other bats such as the traditional straight bat, the traditional cross bat and the like.

The table tennis bat is based on the correct understanding of the objective mechanics law which is necessarily followed by the table tennis. The elastic force direction of the bat surface facing the ball is vertical to the bat surface and points to the center of the ball, the direction of the friction force is tangential along the bat surface, the direction of the resultant force of the bat surface and the normal direction of the bat surface form an included angle, the friction coefficients of different rubber and the table tennis are different, when the table tennis needs to be matched or made to rotate, the table tennis rolls on the bat surface without sliding, the friction force is static friction force, when the sponge rubber of the bat is fixed and the elastic force of the bat surface facing the ball is also fixed, the static friction force is also variable between zero and the maximum static friction force, namely, the included angle between the resultant force direction and the bat surface normal line can be variable between zero and a certain maximum angle, but the ball eating phenomenon is inevitably generated when the maximum angle is exceeded, namely, the ball does not run along the bat direction, and the angle is called as a 'critical angle'; the experiments made by the inventor show that the friction coefficient of the novel reverse rubber and the table tennis is between 2.0 and 2.5, the critical angle of the novel reverse rubber is between 63 and 68 degrees, namely, the minimum included angle between the resultant force direction and the bat surface can reach 27 to 22 degrees, namely, the novel reverse rubber can be used for wiping the table tennis thinly when playing the table tennis, and the aim of the table tennis bat is to ensure that the technical quality of the table tennis is extremely high; the friction coefficient of some positive rubber and table tennis is between 0.1 and 0.2, its critical angle is between 5 and 10 degrees, it is not easy to make and change the rotation of table tennis with this rubber playing ball, the swing direction should be basically consistent with the normal direction of the table tennis. The magnitude direction of resultant force and the acting time jointly determine the change quantity of the translational speed of the table tennis, different balls rotate differently, and the magnitude direction of the torque of the friction force and the acting time jointly determine the change quantity of the angular speed of the table tennis; the table tennis bat has the advantages that the inclination angle of the bat surface is well adjusted, the bat surface is convenient to swing in a tangential direction in an accelerated manner when the bat is swung, and the bat surface is convenient to deal with or manufacture different strong and weak rotations, so that the technique and the technique of playing table tennis are more rich and colorful, and the charm of table tennis is infinite.

Compared with the 'pen-hold table tennis bat' with the patent number ZL201510621275.1 invented by the inventor, the table tennis bat has new substantive characteristics and remarkable progress; the front end of the lower handle bar of the original 'pen-hold table tennis bat' is slightly thicker than the middle part, and the middle part is thinnest, so as to limit the forward movement of a hand holding the table tennis bat; the thickness of the front part and the middle part of the lower handle strip of the table tennis bat is equivalent to that of the lower surface of the bottom plate when sponge and rubber are adhered, but the width of the bat handle is narrowest in the middle part of the lower handle strip, namely the rear end of the bat handle is slightly wider than the middle part of the bat handle, and the front part of the bat handle is wider than the middle red part of the bat handle, so that the forward movement of a bat holding hand can be limited, and the table tennis bat has new advantages; because the friction coefficient between the new inverse rubber and the table tennis is more than 2, the friction force of the racket to the table tennis along the racket surface can be more than twice of the elasticity of the racket along the normal direction when the racket strikes a ball, and the swing of the racket along the racket surface needs to have enough amplitude to be matched; if the table tennis ball rotates before being hit by the racket, the rotating strength of the table tennis ball needs to be increased by entering the table tennis ball along the original rotating direction of the table tennis ball, namely 'adding rotation', the tangential speed of the racket surface must be greater than the linear speed of the ball at the ball contact point of the racket and the ball when the racket hits the ball, the racket surface can effectively push the ball to increase the rotation, and the requirement on the accelerated swinging of the racket along the racket surface is higher; compared with the table tennis bat for straight holding, the table tennis bat has the advantages that the middle finger is more matched with the bat surface when the bat is held, and the two sides of the bat handle are inwards in a concave arc shape, so that the bat surface can swing in an accelerated manner along the tangential direction of the bat surface, and the rotation strength of the table tennis bat is increased; the invention discloses a table tennis bat, which meets the requirement of the precise high-level development of the table tennis technology.

Description of the drawings

Other details and features of the table tennis bat of the present invention will become apparent from a reading of the following detailed description taken in conjunction with the accompanying drawings. Wherein:

fig. 1 is a front view of a table tennis bat of the present invention.

Fig. 2 is a side view of the table tennis bat of the present invention shown in fig. 1.

Fig. 3 is a rear view of the table tennis bat of the present invention shown in fig. 1.

Fig. 4 is a top view of the table tennis bat of the present invention shown in fig. 1.

Fifth, detailed description of the invention

Referring to fig. 1 to 4, the table tennis bat of the present invention is composed of a striking plate 1 and a handle 2. The striking plate 1 is composed of a wooden sole 11, sponge layers 12 on the upper and lower surfaces thereof, and a rubber layer 13. Of course, the sponge and the rubber on the upper surface and the lower surface of the bottom plate can be the same or different according to the hobbies of the player. The racket shaft 2 is composed of a handle 21 integrally formed with the striking plate base plate 11, and an upper handle bar 22 and a lower handle bar 23 respectively adhered to the handle 21. As is apparent from fig. 4, the rear end of the handle 2 has a cross-sectional shape similar to that of a conventional racket, approaching an ellipse. From fig. 2, it can be seen that the middle rear part of the upper handle strip of the racket handle is thicker, the front end is in a wedge shape with a convex middle part, meanwhile, a U-shaped equal thickness line can be seen from fig. 1, the same U-shaped equal thickness line part indicates that the handle strips have the same thickness, and the surface of the whole upper handle strip is a convex curved surface. As can be seen from figure 2, the front end and the middle part of the lower handle strip of the racket handle are thin, the thickness of the front end and the middle part is equivalent to the total thickness of the sponge and the rubber on the bottom plate, the rear end of the lower handle strip is thicker than the front end and the middle part, the front end surface forms an inclination angle, and the front end of the lower handle strip extends into the position between 3-5 and 4-6 of the horn-shaped racket neck of the bottom plate so as to ensure that the racket handle and the striking plate cannot be broken or damaged. Meanwhile, it can be seen from fig. 3 that the arc-shaped curve represents the equal thickness line of the lower handle strip, and the same arc-shaped curve part represents the smooth curved surfaces of the upper and lower handle strips with the same thickness along the central axis of the racket handle and with the thin two sides. As can be seen from both figures 1 and 3, the trumpet-shaped racket necks 3-5 and 4-6, the handle 21, the upper handle strip 22 and the lower handle strip 23 have the narrowest middle part and the two sides are inwards concave curves, which jointly ensure stable and flexible holding racket and good hand feeling.

Claims (1)

1. A table tennis bat consists of a striking plate, a bat neck and a bat handle which are basically oval in shape, and is characterized in that the bat neck and the bat handle are in an integral combined shape, the bat neck is connected with the striking plate surface like a horn mouth, and the horn tail is connected with an upper handle strip in a horn shape, namely, the width gradually narrows from the shoulder of the striking plate to the middle end of a lower handle strip of the bat handle; the upper handle strip of the racket handle is shorter than the lower handle strip, the length of the upper handle strip is about two thirds of the length of the lower handle strip, the middle rear part of the upper handle strip is thick, the front end of the upper handle strip is thin, the front end of the upper handle strip is narrower than the horn-shaped racket neck, and the whole upper handle strip is in a wedge shape; the front end of a lower handle strip of the racket handle extends into the racket neck, the rear end of the lower handle strip is thicker, and the thickness of the front end and the middle part of the lower handle strip is equivalent to that of the sponge and the rubber adhered to the lower surface of the bottom plate; the upper handle strip and the lower handle strip of the racket handle are bilaterally symmetrical along the central axis, are thick close to the central axis and are thin on two sides, the upper handle strip and the lower handle strip are asymmetrical to the bottom plate, the racket handle is narrowest in the middle of the lower handle strip, and the surfaces of the handle strips are curved surfaces.

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