Novel straight-grip table tennis bat

Abstract

A novel straight-grip table tennis bat is characterized in that the bat is in an integral structural shape composed of a ball hitting plate, a bat shoulder, a bat neck and a bat handle, the ball hitting plate is basically oval, the bat shoulder is connected with the ball hitting plate, the bat neck is connected with the bat handle, the bat shoulder passes through the bat neck to the front portion of a handle strip of the bat handle and is gradually narrowed, and the front portion from the bat shoulder to the bat neck is wider than the rear portion of the bat handle. The front section of the handle strip of the racket neck is the narrowest part of the racket handle, two sides of the racket neck are concave curves inwards, the racket shoulder and the racket neck are integrally and obviously thinner than a traditional racket, the handle strip is in a wedge shape and is narrow in front, wide in rear, thin in front and thick in rear, the front end of the handle strip is narrower than the racket neck, and an upper handle strip and a lower handle strip of the racket handle are bilaterally symmetrical along the central axis, thick close to the central axis and thin on two sides. When the racket is held, the jaw obliquely faces the middle of the racket handle, the middle finger is naturally attached to the rear racket face, the thumb and the index finger clamp and buckle the racket handle in front of the racket, the ring finger and the little finger lean against the racket shoulder edge, and the two-face racket holding method is scientific, advanced and applicable.

Description

Technical Field

[0001] This utility model relates to a racket for playing table tennis. Background Technology

[0002] Traditional penhold grip table tennis racket grips are divided into fast attack grip, ball-canceling grip, and topspin grip. However, they all generally involve the thumb and forefinger facing the handle, the middle, ring, and little fingers extending into the back of the blade to support it, and the thumb and index finger clamping the handle in front. In the era of the 38mm diameter ball in table tennis, the traditional penhold left-push-right-attack style achieved brilliant results in international competitions and is still widely used in the market and by many table tennis enthusiasts. Since 2000, when the 40mm diameter ball was adopted, the diameter of the table tennis ball has increased by approximately 5.3%, the volume by approximately 18%, and the mass by 8%, from 2.5g to 2.7g. The formula for the moment of inertia of a uniformly mass-distributed ball shell is J = (2 / 3)mR. 2Therefore, the moment of inertia of the ping-pong ball increased by more than 20% after the ball was changed from a small one to a large one. Even if we only need to maintain the speed and spin of the small ball when hitting it with a large ball, we still need to provide more translational and rotational kinetic energy to the ping-pong ball. In other words, more work needs to be done on the ping-pong ball during the hit. Due to the significant increase in the moment of inertia of the ping-pong ball, it is more difficult to generate and change the spin of the ball. After switching to a large ball, on the one hand, it is not easy for the speed of the ping-pong ball at the time of the hit to be as high as that of the small ball. On the other hand, because the air resistance encountered by the ping-pong ball in the air increases, the ball's flight speed is slowed down, so the rhythm of the game becomes slower. Now, in the era of ping-pong balls with a diameter of 40mm, there are very few high-level players who use traditional penhold grips to play ping-pong. Both theory and practice show that the traditional penhold grip really cannot function without improvement. The square-grip penhold grip used by Japan and South Korea shares similarities with the traditional Chinese penhold grip. The thumb and forefinger are positioned behind the handle, with the middle, ring, and little fingers supporting the back of the blade, and the thumb and index finger gripping the front of the handle's upper bar. While this grip allows for powerful smashes, the relatively rigid hand position and racket shape limit flexibility in racket face adjustment, resulting in a limited range of techniques. Few players use this grip, making it difficult to reach the pinnacle of table tennis. The shakehand grip, on the other hand, involves the thumb and forefinger facing the racket shoulder, with the thumb and index finger diagonally resting on either side of the blade, and the middle, ring, and little fingers gripping the handle. This shakehand grip allows for better power generation for both forehand and backhand, covers a wider area of ​​the court, and provides stronger mid-to-long-range rallies, currently holding a relative advantage. However, the shakehand grip requires a slower reaction time when switching racket faces for forehand and backhand strokes, resulting in weakness with short balls in the middle and near the table. Furthermore, the index finger, which rests diagonally on the racket face, is not aligned with the handle, and the striking surface is not aligned with the arm. This grip is unscientific and unreasonable, hindering racket face control and transitions between different techniques. Many errors made by high-level international shakehand grip players are due to untimely and inadequate racket face adjustments during strokes. While many new types of table tennis rackets have emerged in recent years, and may be suitable for certain situations, their designers lack a proper understanding of the dynamics of table tennis in the era of the larger ball, preventing their widespread adoption. The eternal pursuit of table tennis is to play more accurately, faster, more aggressively, with stronger spin, more variation, and with greater excitement and visual appeal. Watching a table tennis match is dazzling, with seemingly endless variations. However, when a table tennis ball flies through the air, its trajectory is basically a parabola due to gravity. The entire table tennis ball undergoes both translational motion with its center of mass (the center of the ball) and rotation around an axis of rotation that passes through the center of mass (the center of the ball). The axis of rotation has different spatial orientations, and the rotation has different strengths. When a table tennis ball with different rotations lands on the table and hits the paddle face, it will bounce differently.When we hit a ping-pong ball with a paddle, the point of application of gravity on the ball is at the center of the ball, the magnitude of which, mg, remains constant, and the direction is vertically downward. If the paddle and the ball come into contact and deform due to mutual compression, the paddle exerts an elastic force on the ball. The point of application of this elastic force is at the point of contact, and the magnitude of the elastic force is variable; the greater the deformation, the greater the elastic force. The direction of the elastic force is from the point of contact towards the center of the ball. When the paddle and the ping-pong ball have an elastic force, if the paddle surface and the ping-pong ball tend to move relative to each other along the tangential direction of the paddle surface, the paddle surface exerts a static friction force on the ping-pong ball. The point of application of this static friction force is at the point of contact, and the magnitude of this static friction force is variable between zero and the maximum static friction force. The maximum static friction force is equal to the static friction coefficient multiplied by the normal force elastic force, and the direction of this static friction force is through the point of contact along the tangential direction of the paddle surface. When playing table tennis, the resultant force F of the ball's mass *m*, the acceleration of its center of mass *a*, and the forces of gravity, elasticity, and friction obeys Newton's second law, F = ma. The composition of forces uses the parallelogram law. The speed at which the ball flies depends on its initial velocity, the acceleration caused by the racket, and the duration of the force. Calculations here also use the parallelogram law. The magnitude and direction of the ball's velocity when it leaves the racket determine its trajectory in the air. The strength of the ball's spin is described by its angular velocity ω (or rotational speed *n*). Only the frictional force between the racket and the ball creates a torque *M*. The torque *M*, moment of inertia *J*, and angular acceleration *β* on the ball obey the rotational law M = Jβ. Angular acceleration and the duration of the force determine the change in angular velocity. In other words, the angular velocity of the ball's rotation after being hit is determined by its initial angular velocity, angular acceleration, and duration of the force. Calculations here also use the parallelogram law. When the elastic force is constant, since the static friction force can vary between zero and the maximum static friction force, the magnitude and direction of the resultant force of the racket on the ball, i.e. the resultant force of the elastic force and the friction force, can vary. When the friction force reaches the maximum static friction force, the angle between the resultant force and the racket face normal is the maximum and the angle between the resultant force and the racket face tangent is the minimum. I call the maximum angle between the direction of the resultant force of the racket on the ball and the racket face normal (at which point the angle between the resultant force and the racket face is the minimum) the "critical angle".To hit the same ball to different landing points on the opponent's side of the table, it's necessary to adjust the magnitude and direction of the combined force exerted by the racket on the ball. This requires adjusting both the racket face direction and the direction of the swing. Even if the required magnitude and direction of the combined force are fixed, different proportions of elasticity and friction can be achieved, and the racket face direction and the direction of the swing can be adjusted. Some new inverted rubbers have a coefficient of friction between 2.0 and 2.5 with the table tennis ball, and their maximum static friction is more than twice the elasticity. The maximum angle between the direction of the combined force exerted by the racket on the ball and the racket face normal can reach 63° to 68°, meaning the minimum angle between the combined force and the racket face can be as low as 27° to 22°. The angle between the direction of the swing and the racket face is very small, commonly known as "very thin contact with the ball," resulting in a ball with strong spin. To hit balls with varying degrees of spin using inverted rubber with a high coefficient of friction, adjustments to the racket face and the direction of the swing can be made. Some short pips rubbers have a coefficient of friction between 0.1 and 0.2 with the ball, and their maximum static friction is only one-tenth to two-tenths of the elasticity. Their critical angle is between 15° and 10°, and the angle between the direction of the resultant force of the racket and the direction of the racket face normal is very small. It is not easy to create spin or change the original spin of the ball when playing with this kind of rubber. The direction of the swing should be basically consistent with the direction of the racket face normal. Short pips, long pips, and raw pips rubbers have a very low coefficient of friction and high elasticity. When a strong spin ball hits such rubber, it will slip in place, just like a car wheels spinning but not moving in mud. The ball returned basically does not change its original spin. Due to the reversal of the flight direction, the spin is also reversed. Topspin becomes backspin, backspin becomes topspin, left spin becomes right spin, right spin becomes left spin, left-side backspin becomes right-side topspin, and right-side topspin becomes left-side backspin. Every table tennis player plays against different opponents. Different opponents have different habits and preferences, resulting in different ball characteristics. To effectively respond to balls with varying characteristics, it's necessary to adjust the racket face and swing direction accordingly. The ease of adjustment of the racket face is an objective requirement. There are many types of sponges and rubbers used in table tennis, each with different performance characteristics. If the sponges and rubbers on both sides of the racket are different, switching between different racket faces during the game will make it more difficult for the opponent to respond, thus increasing the chances of achieving better results.My inventions, patent number ZL201510621275.1 (a straight grip table tennis racket) and patent number ZL202222681230.1 (a table tennis racket), possess outstanding substantive features and significant progress due to their innovative handle design and grip method. In terms of grip, when the long handle is aligned with the web of the thumb, only the middle finger is inserted along the handle into the striking surface, while the thumb and index finger clamp the handle in front of the racket face. The ring and little fingers rest diagonally against the racket's shoulder. This grip method combines the advantages of traditional shakehand grips—good power generation for both forehand and backhand, wide coverage area, and strong mid-to-long-range rally ability—with the advantages of traditional penhold grips—allowing for quick reaction and flexible handling of balls close to the table—essentially organically integrating the advantages of both traditional shakehand and penhold grips. The two rackets are now unified, with the latter allowing for more precise control of the racket face when gripping, which is beneficial for maximizing table tennis skills. However, both rackets have a longer handle on the side closest to the thumb when gripping with the forehand. My patented racket has a longer and thinner shoulder and neck than other traditional rackets. The original design of the longer handle was simply to strengthen the racket neck. With the current technology, the material of the table tennis blade is very good. When the width of the blade at the racket neck is appropriately widened, the strength of the racket neck can be guaranteed. The longer handle is actually an unnecessary obstacle. It has no beneficial effect when gripping with the forehand, and it hinders the movement of the thumb and index finger when gripping with the backhand. The different handles on both sides make it difficult to achieve the best feel when switching grips. Table tennis is a sport that requires science and wisdom. To play table tennis well, one needs to understand relevant mechanics. The existing table tennis rackets are not satisfactory. In order to further improve the quality of table tennis techniques, enrich the content of table tennis tactics, enhance the practical ability of playing table tennis, promote the higher and better development of table tennis, and contribute to the health and happiness of the people, and create new glories for the national table tennis athletes to achieve new successes in international competitions, we need to invent and create better new straight-grip table tennis rackets. Summary of the Invention

[0003] This utility model relates to a new type of straight-grip table tennis racket, which is a racket for playing table tennis. It consists of a basic elliptical-shaped hitting blade, a racket shoulder, a racket neck, and a racket handle. The racket shoulder is connected to the hitting blade, and the racket neck is connected to the racket handle. From the racket shoulder through the racket neck to the front of the handle bar, the width gradually decreases. The front of the racket shoulder to the racket neck is wider than the rear of the handle. The racket neck is the narrowest part of the handle at the front of the handle bar. The racket shoulder and racket neck are significantly thinner and longer than traditional rackets. The handle bar is wedge-shaped, narrower at the front and wider at the back, thinner at the front and thicker at the back. The front end of the handle bar is narrower than the racket neck. The upper and lower handle bars are symmetrical along the central axis, thicker near the central axis and thinner on both sides. The upper and lower handle bars are symmetrical with respect to the base plate. The surface of the handle bar is a convex curved surface, and the rear cross-section of the handle is basically elliptical.

[0004] This utility model of a new straight-grip table tennis racket is a further improvement and refinement based on the straight-grip table tennis racket with patent number ZL201510621275.1 and the table tennis racket with patent number ZL202222681230.1 invented by me. First, the front part of the longer handle is removed, and both the upper and lower handles are wedge-shaped, the same size, length and thickness are symmetrical with the base plate, and the overall shoulder and neck are significantly slimmer and longer than traditional rackets, and the width of the neck is moderate. The total length of the shoulder, neck and handle of this new straight-grip table tennis racket is longer than that of the traditional straight racket, but the length of the handle is not as long as that of the shakehand racket handle.

[0005] The grip method for this novel straight-grip table tennis racket is as follows: the tiger's mouth (the area between the thumb and index finger) is diagonally aligned with the middle of the handle, the middle finger is placed against the back of the racket blade along the handle, the second and third joints of the middle finger can be naturally straightened or bent along the handle on the racket face, the thumb and index finger wrap around the neck of the racket and clamp the handle in front of the racket blade, and the ring and little fingers are naturally bent and lean against the racket shoulder. The racket can also be gripped upside down, and the grip method is exactly the same on both sides.

[0006] This utility model of a new straight-grip table tennis racket inherits and develops the advantages of my previous patented rackets. Whether it is the overall shape of the racket shoulder, neck, and handle, or the grip method, it has outstanding substantive features and significant progress compared to existing rackets. The overall structure and grip method of this racket handle are the result of long-term exploration and improvement under the guidance of relevant mechanical theories and scientific ideas after the table tennis ball was changed to a 40mm diameter ball, and have been tested in practice.The new penhold table tennis racket gradually narrows from the shoulder and neck to the front of the handle bar, with the section from the shoulder to the front of the neck wider than the rear of the handle. The neck is the narrowest part of the handle, designed to limit forward movement of the hand and prevent the fingers from sinking too deep into the hitting surface. The shoulder and neck of the new penhold racket are significantly longer and thinner than other rackets. This is based on the new grip technique where only the middle finger extends into the hitting surface and is aligned with the handle and arm, while the ring and little fingers can naturally bend and rest against the edge of the shoulder. This grip is similar to the traditional shakehand grip where the index finger is angled and rests against the racket face, making it easier to generate power for both forehand and backhand shots. With a large racket face, it offers strong mid-to-long-range rallies. Extending the middle finger into the racket face is easier than extending the index finger for adjustment. The naturally curved ring and little fingers, resting against the edge of the racket shoulder, work together to control the racket face and can also assist in the tangential movement of the racket face when necessary, increasing the spin intensity of the ball. The new penhold racket features a wedge-shaped handle, narrower at the front and wider at the back, thinner at the front and thicker at the back. The front of the handle is narrower than the base plate at the neck, making it comfortable and natural for the thumb and index finger to grip the handle from the back. The high degree of fit between the hand and the racket facilitates powerful swings, increasing the speed of the ball, and also enhances the tangential acceleration of the racket face, thus increasing the ball's spin. (This is a description of the original patented racket.) With the longer front section of the handle removed, the blade has a wider neck. Combined with the high-quality materials used in modern table tennis blades, some of the force applied by the gripping hand is directly applied to the hitting surface through the middle finger, allowing the blade to withstand the force of the shot. The space freed up by removing the longer front section of the handle also allows for better control of the racket face with the thumb and index finger when using a reverse grip. The handle and grip are in a more scientifically optimal position, facilitating improved shot quality and easier transitions between different techniques, enhancing overall game responsiveness. This new penhold table tennis racket, with its new grip, allows for better control of the middle positions on both forehand and backhand sides. The racket allows players to hit the ball with the same side of the racket, a feature that gives traditional penhold grips a faster reaction time compared to traditional shakehand grips. Combined with the previously mentioned ability to generate power effectively from various positions, this new penhold racket organically integrates the advantages of both traditional penhold and shakehand grips. The identical handle strips on both sides are scientifically and practically designed, ensuring optimal feel when switching grips and guaranteeing high-quality play for different techniques. Furthermore, the sponge and rubber on each side of the hitting surface can be different, producing different ball performance. Switching grips in this case increases the tactical content and combinations in table tennis, which will undoubtedly promote the sport's further development.

[0007] This utility model presents a novel straight-grip table tennis racket. Its overall structure and grip method represent a significant improvement over existing technologies. Because only the tip of the middle finger extends into the striking surface, and the racket handle and arm are aligned in a straight line, it facilitates keeping the racket and arm parallel to the ground and allowing for a parabolic motion in the vertical plane. Swinging the racket along the trajectory of the ball increases the probability of hitting the ball. Furthermore, instead of the middle, ring, and little fingers being deeply embedded in the striking surface to support it, only the tip of the middle finger extends into the striking surface, while the other fingers control the racket face within the relatively small shoulder and neck area. Whether striking or brushing the ball, the striking surface has a larger range of motion than the fingers, creating a magnifying effect that meets the needs of table tennis after the adoption of a larger 40mm diameter ball. Using this new penhold table tennis racket, the racket and hand are highly integrated; the racket is a proper extension of the hand, the striking surface is like the palm of a hand, and the racket neck is like a joint in the human body. This makes the backswing and arm swing more fluid and expressive, better showcasing the whipping effect and making the table tennis motion more beautiful. Different types of sponges and rubbers can be glued to the two sides of the striking surface, enriching and developing the tactical and technical aspects of table tennis by switching the grip. The racket handle and the hand can move relative to each other, allowing for better power generation when hitting backhand balls with either side of the striking surface. This not only makes the new penhold backhand technique more applicable but also increases the options for returning the ball, making the shot more unpredictable and increasing the difficulty for the opponent to anticipate and respond, thus contributing to better results in the match. Table tennis originated in England, and its English name, table tennis, means tennis on a table. Although the rules and playing styles of table tennis and tennis are completely different, both require accurate shots, and speed and spin are very important. They follow the same mechanical laws and principles. After the table tennis ball was changed from a small ball with a diameter of 38mm to a large ball with a diameter of 40mm, the competition became more intense and competitive, and the players had a wider range of movement, making the game more exciting, beautiful, and entertaining. The new straight-grip table tennis racket has certain similarities in shape to the tennis racket in the shoulder and neck areas, which is a natural consequence of following the same mechanical laws. Attached Figure Description

[0008] Other details and features of this novel straight-grip table tennis racket will become clear from the following detailed description in conjunction with the accompanying drawings. Specifically:

[0009] Figure 1 This is the front view of the new straight-grip table tennis racket of this utility model.

[0010] Figure 2 yes Figure 1 The image shown is a side view of the new straight-grip table tennis racket of this invention.

[0011] Figure 3 yes Figure 1 The image shown is a rear view of the new straight-grip table tennis racket of this invention. Detailed Implementation

[0012] Reference Figures 1 to 3 This utility model of a new straight-grip table tennis racket consists of a hitting blade 1 and a handle 2. The hitting blade 1 is composed of a sponge layer 12 and a rubber layer 13 on the upper and lower surfaces of a wooden base plate 11. Of course, depending on the player's preference, the sponge and rubber on the upper and lower surfaces of the base plate can be the same or different. The handle 2 consists of a handle 21 integrally formed with the base plate 11 of the hitting blade and upper and lower handle strips 22, 23, and 24 respectively pasted onto the handle 21. Figure 1 We can see the racket shoulders (3 and 4), the racket neck (5 and 6), the handle (21), and the upper and lower handle strips (22, 23, and 24). The racket shoulders are connected to the hitting plate, and the racket neck is connected to the handle strips. The width gradually narrows from the racket shoulders (3 and 4) to the racket neck (5 and 6). The racket shoulders and racket neck are significantly slimmer and longer than traditional rackets. The front part of the racket shoulders (3 and 4) to the racket neck (5 and 6) is wider than the rear part of the handle. The racket neck is the narrowest part of the handle at the front of the handle strips, with inward-curving curves on both sides. Figure 1 Seeing the "U"-shaped equal thickness line indicates that the same area of ​​the shank bar has the same thickness. The upper and lower shank bars are symmetrical about the central axis, thicker near the central axis and thinner on both sides; from... Figure 1 and Figure 2 It can be seen that the handle bar is wedge-shaped, narrower at the front and wider at the back, thinner at the front and thicker at the back, with the entire handle bar surface being a convex curved surface; from Figure 2 It can also be seen that the upper and lower handle strips are symmetrical with respect to the center plane of the base plate, which facilitates gripping and using the racket face down; from Figure 3 It is evident that the cross-sectional shape of the rear end of the handle 2 is similar to that of a traditional racket, and is basically elliptical. The overall structure of the handle ensures a stable, flexible, and comfortable grip for the new straight-grip table tennis racket. The ability to use the racket with the handle reversed is beneficial for enriching, developing, and improving table tennis techniques and tactics.

Claims

1. A new straight grip table tennis bat characterised in that: The new straight-grip table tennis racket is an integral structure consisting of a blade, a shoulder, a neck, and a handle. The shoulder is connected to the blade, and the neck is connected to the handle. From the shoulder through the neck to the front of the handle bar, the racket gradually narrows. The front of the neck is wider than the back of the handle. The neck is the narrowest part of the handle at the front of the handle bar. The two sides of the neck are concave curves inward. The shoulder and neck are significantly thinner and longer than traditional rackets. The handle bar is wedge-shaped, narrower at the front and wider at the back, thinner at the front and thicker at the back. The front of the handle bar is narrower than the neck. The upper and lower handle bars are symmetrical along the central axis, thicker near the central axis and thinner on the sides. The upper and lower handle bars are symmetrical with respect to the blade. The surface of the handle bar is convex. The rear cross-section of the handle is basically elliptical.

2. A new straight hold table tennis bat as claimed in claim 1 wherein: The proper grip is as follows: the web of your thumb and index finger should be angled towards the middle of the handle, with your middle finger resting against the back of the racket blade along the handle. The second and third joints of your middle finger can be naturally extended or bent along the handle on the racket face. Your thumb and index finger should wrap around the neck of the racket and clamp the handle in front of the blade. Your ring and little fingers should be naturally bent and rest against the racket shoulder. You can also grip the racket upside down; the grip is exactly the same on both sides.

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