What does the balance point of tennis rackets mean? Balance points are the center of gravity of rackets. This article introduces the center of gravity of the racket, the weight of the racket, the weight of the head weight, the method of changing the racket balance, and the installation method of tennis rackets.Knowledge.
Design principles of tennis racket
The design principles of rackets depend on the type and level of players to a large extent.The principles include strength, control, comfort, and mechanical failure.Under the ideal state, all rackets are pursuing the maximum of these indicators, and ultimately choose strength and control as the most important indicators in the design.
The first design principle is "using network cables for more power."After being impacted, the network cable can restore about 90%of the deformation energy, and the separate ball (rebound on the hard surface) can only restore 45%of the energy (BRODY, 1995).In addition, the energy of the framework of the racket frame does not respond to the ball in time, increasing the energy of the ball, which means that the maximum deformation of the network cable when the racket is impacted, which is more motivated than the deformation of tennis or framework.In the 1970s, after a large racket appeared, the principle of restricting network line beds began.The current principle formulates the maximum value and width of the network cable, and measures in the two parts of the frame.Later, the trial of maximizing mesh beds was concentrated in the shape of a square racket face, not a simple circle.This leads to the length of all network cables, but there are structural restrictions. The framework becomes difficult to make, the strength is not enough, and the appearance feels bad.Many manufacturers have adopted a larger rod that allows the effective size of the network cable bed to extend to the outside of the frame.Another factors that affect power are quality distribution. Although the quality distribution is difficult to achieve the optimal value, the principle is relatively simple, that is, the light ball card is swinging fast and increased the speed of hitting the ball.It can also lead to increased ball speed, especially if the increased quality is added to the hitting point.Therefore, when designing the racket, the quality must be small enough, can swing and hit at high speed, and at the same time, it must have sufficient quality to optimize the rebound characteristics of the tennis.
Handling
Small heads and frameworks with high anti -twist stability often have good control capabilities, because the deflection angle of network cables and frameworks is small.A large angle deflection that deviates from the racket center will cause the rebound angle when the tennis leaves the network cable is greater than the perfect rebound angle generated by the smooth surface.This small difference may cause players to make a big mistake during the game.High resistance to reversing makes the racket in the hand twist less, so as to get a more accurate hit point.This is also impact on the control of the network cable. It is noticed that this may be helpful for control.In order to create small heads with good stability, the quality of the head of the racket frame is needed (3 oclock and 9 oclock) in the surrounding of the racket frame.More dense network cables lead to more efficient network cable tension, reduce angle deviation, and reduce rotation, which is more important for some contestants.
Comfortable
Each tennis player has its own different feelings about the comfort of using the racket, which is very difficult to transform the players feedback information into actual design parameters.So far, the attention of players is mainly focused on reducing the impact of rackets and the extent they generated.Compared with the old -fashioned thumb rackets commonly used by previous players, the rigid racket often has a lower seismic resistance, so it is added to experiment with additional seismic resistance.The rigid racket sounds louder when hitting, and most players dont like it, so they use shock ropes.The method of reducing the impact includes move the center of the hit to the racket center and increase the quality of the ball frame.Factors related to comfort include the polishing of the racket surface and the material of the handle handle. The manufacturer already has very standard craftsmanship and methods.
Mechanical failure
The rackets used in high -level competitions are usually designed as long as possible within the required range. The introduction of carbon fibers makes the racket a huge leap in performance and intensity.The connection between the main body, the closing part and the cutting end of the racket is the most powerful from the network cable, but most of the manufacturers solve this problem by replenishing this part.The markets demand for high -quality rackets forced manufacturers to improve their structural design as much as possible, forming a complex and special racket type that adapts to different impact conditions.In the case where the intensity is not much reduced, most methods to reduce the quality are to use a pre -immersed stain blanket with low resin content, and use a small amount of paint layer and the lining and expansion materials provided in the abrasive.During the test, these rackets are very fragile because they are under normal load, because they are not designed for non -normal stress conditions.The key to this process uses the appropriate test method to ensure that the design of the racket can meet the force during the game.
Designed for different consumer groups
There is no perfect racket suitable for all athletes, because the level of players is different, and the play style is different.Different types of rackets should be developed as much as possible to adapt to different consumers.
When the players start playing, they always use the racket with less quality and larger noodles.Because they do not have the skills and strength of professional players, these players often play the ball.The big racket makes up for this shortcoming. It enables these golfers to better control the ball, improve the level faster, and be happier.When playing the ball, the torque is more stable, which saves a lot of physical strength for the players, and the big racket means big power, which can make the players have certain advantages in the early stage of learning.
Some club players who are regularly played and entertaining are willing to use smaller rackets with smaller noodles because they are at the level of playing level to better control the ball and determine the quality of the racket based on their own play style.The bottom -line player likes to use long and heavy rackets.The explosive player likes light and more flexible rackets.
There are also professional players in the tour. The rackets are smaller and the quality is larger than the beginners.This level of golfers can wield heavy rackets and widths faster.Some of the rackets used by some top professional golfers are customized, and some are twice the quality of beginners.
Different consumer groups lead the manufacturers to sell the following different types of rackets: beginners, middle -level and master series. Each series has different racket quality for choice.
Detailed introduction of tennis racket balance
The balance point of the racket is the focus of the racket.If the balance point of the racket is closer to the head, it is called "head heavy"; if the balance point of the racket is closer to the shot handle, it is called "head light".
According to the principles of mechanics, the weight of tennis rackets is directly proportional to the power of swing, and the distance between the balance point and the midpoint is proportional to the power of the swing.Therefore, the same balanced racket, the greater the weight of the weight; the same weight, the closer the balance point, the greater the swing power.
Due to the greater inertia of shooting the head during the shot, the ball played is more powerful, but the flexibility of the swing is slightly worse, so it is more suitable for the bottom line offensive player; although the light racket is more flexible, it is played, but it is played out.The ball strength is small, and the shock transmission of the racket will also be large, so it is not suitable for the bottom line of offensive players with a large playback power, and it is more suitable for the pre -net players who have great requirements for the flexibility of the swing.
There are three main units that indicate the balance of the racket. The international PT is usually labeled. Domestic mainly uses centimeters and inch representations.
There are two main ways to indicate, one means the length from the bottom of the handle to the center of gravity, and usually uses centimeters as a unit; the other means the length from the center point of the racket to the center of gravity, and usually uses an inch or PT as a unit.
In the usual sense, the racket weight and balance point are proposed for new rackets that are new, without strings and additional handle or other additional objects (attached: a weight of a strings is usually about 17 grams).
There are many ways to change the racket balance. Here are the easiest and easy ways: install lead tablets.The proportion of lead and good ductility, so the weight of this material is not only small in size and large, but also closely fits on the racket.
Flag film installation method
Before paste, first clean the position to be pasted; then tear off the sticker on the back and paste it.If you want to increase the weight at the head, you need to paste it on the shooting frame. It should be noted that when paste, the center shaft of the racket should be pasted symmetrically.Remove it and paste the lead film on the two handle surface parallel to the noodles.
If you just want to increase the racket, you can stick lead films at the balance point.In addition, the use of lead films should be pasted according to your actual needs, instead of blindly imitating. It is best to modify the racket weight and balance under the guidance of the professionals, otherwise it may cause the tennis racket to be difficult to use or even cause injuries.

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