Connecting structure for racket frame and middle tube of badminton racket

Abstract

The utility model mainly provides a racket frame and middle tube connecting structure of a badminton racket, the racket frame is provided with a frame middle part, one end of a middle tube is fixedly arranged on the frame middle part, a middle sleeve piece is arranged in the fixed connecting end of the middle tube, a counterweight piece is screwed in the middle sleeve piece, the counterweight piece is provided with a screw joint and an outer diameter screw joint section, and the middle sleeve piece is provided with an outer diameter screw joint section. The screw joint and the screw joint section are in a coaxial state and are adjacent to each other through a convex step surface, and after the counter weight piece is arranged in the middle sleeve piece in a threaded mode, the convex step surface abuts against the middle pipe, the end face of the middle sleeve piece and the inner edge wall of the racket frame at the same time; therefore, when the weight needs to be adjusted, the middle sleeve piece and the balance weight piece which are designed in a threaded connection structure are utilized, the balance weight piece is screwed out, another balance weight piece with different weight is replaced and is screwed and locked in the middle sleeve piece, so that the effects of enhancing the attack energy, improving the stability and the accuracy of hitting the ball, improving the falling point angle, being more lethal, and improving the safety and the reliability of the ball are achieved. And if the middle sleeve piece or the counterweight piece is made of a plastic material, the counterweight weight and the shock absorption effect can be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of badminton racket technology, and in particular to a structure for the connection between the frame and the shaft of a badminton racket. Background Technology

[0002] Badminton originated in 1870 and has a history of over 150 years. It is a sport developed primarily through the actions, techniques, and rules of hitting a shuttlecock with a badminton racket. The combination and application of various factors such as the flight path, speed, and landing point of the shuttlecock after it is hit creates a fascinating sport where players can determine a winner. Besides mastering basic badminton hitting techniques, using a suitable badminton racket and being proficient in its use is crucial for controlling the shuttlecock's flight path, speed, and landing point, which is key to victory.

[0003] Badminton racket materials have evolved from early wooden frames to today's carbon fiber frames, resulting in improved feel and control during the swing. The structure of a badminton racket can be broadly divided into the frame, strings, throat, shaft, cap, grip, and end cap. The shaft connects to the frame at one end and the grip at the other, with the throat connecting the shaft and frame. The frame contains a net woven from strings, and the grip has a cap and end cap at each end. The grip is where the hand holds the racket, while the net is used for hitting the shuttlecock.

[0004] Analyzing the "T-joint" part of a badminton racket, also known as the "T-joint," it is mainly located between the frame and the shaft, used to securely connect the frame and shaft. Since the frame and shaft can be made of the same or different materials depending on the requirements, common examples include an aluminum frame connected to a carbon fiber shaft, an iron frame connected to an aluminum shaft, or a carbon fiber frame connected to a metal shaft. Especially when one of the frame or shaft is made of carbon fiber, since carbon fiber cannot be threaded or drilled, the T-joint can be used as a connecting medium to connect the frame and shaft. This type of T-joint structure is considered "external." Examples of this structure include the "Training Badminton Racket" disclosed in Taiwan Patent No. 107202134 and the "Badminton Racket T-Joint Structure" disclosed in Taiwan Patent No. 092202160.

[0005] Another type of "encased" T-joint structure utilizes carbon fiber to completely encase both the frame and the shaft, appearing as a single piece. It is lighter than the external T-joint structure and exhibits superior structural strength. Examples of this type of structure include the "Badminton Racket T-joint Device" disclosed in Chinese Patent No. CN2728564Y, the "Reinforced Structure of Composite Material Badminton Racket Shaft and Frame" disclosed in Taiwan Patent No. 82210224, and the "Improved Structure of Badminton Racket Throat" disclosed in Taiwan Patent No. 82210777.

[0006] Besides connecting the frame and shaft, the T-joint of a badminton racket can sometimes be used to add shock absorption or weight distribution, depending on the needs. For example, the "composite material badminton racket" disclosed in Taiwan Patent No. 099212346 and the "badminton racket T-joint device" disclosed in Chinese Patent No. CN2728564Y further incorporate shock-absorbing pads within the T-joint to achieve a shock absorption effect. Additionally, the "badminton training racket with adjustable weight distribution" disclosed in Taiwan Patent No. 113206940 further incorporates a weight distribution device within the T-joint to achieve a weight distribution effect.

[0007] In existing badminton rackets, weighted rackets primarily provide players with an alternative to meet different weight and balance point requirements, affecting the overall weight and balance point (center of gravity) of the racket. Regarding racket weight, heavier rackets, while providing greater attacking power, feel cumbersome to swing, while lighter rackets have less attacking power but offer more agility and control. Analyzing the balance point position, a balance point closer to the head of the frame results in more dynamic swings but requires more effort for flat shots and defense; a balance point closer to the center of the frame allows for a more balanced performance across various shot types, making it more suitable for beginners; and a balance point closer to the handle results in faster swing speeds but requires more effort to reach greater distances.

[0008] However, in the current technology, it is inconvenient to adjust the weight of badminton rackets with counterweight function. Utility Model Content

[0009] Therefore, in response to the aforementioned problems of the prior art, the creator of this case proposes a badminton racket T-head structure that is located at the T-head of the racket, allows for weight adjustment, and also has a shock absorption effect.

[0010] In view of this, the badminton racket frame and shaft connection structure disclosed in this utility model includes: a racket frame, which is annular in shape, with a shaft of a predetermined length connected to a predetermined part of the racket frame. The racket frame has a middle frame, and the shaft is fixed to the middle frame at one end. It is fixed into the middle frame from the outer edge of the racket frame. The edge of the fixed end of the shaft is aligned with the inner edge of the racket frame. A counterweight assembly is provided inside the fixed end of the shaft, including a middle sleeve and a counterweight block. A counterweight is screwed into the middle sleeve. The counterweight has a threaded joint with a larger outer diameter and a threaded section with a smaller outer diameter. The threaded joint and the threaded section are coaxial and adjacent to each other with a convex stepped surface. After the counterweight is screwed into the middle assembly, the convex surface of the counterweight will simultaneously abut against the end faces of each middle tube, the middle assembly, and the inner edge wall of the frame. Thus, this utility model uses the middle tube to connect the outer and inner edges of the frame. The middle assembly and counterweight, designed with a screw connection structure, allow the counterweight to be screwed out when the weight needs to be adjusted. A different counterweight of different weight can then be replaced and screwed into the middle assembly, thus completing the replacement. Therefore, it has the effect of adjustable counterweight, thereby enhancing the attacking energy, improving the stability and accuracy of the shot, and increasing the landing angle for greater lethality. If combined with the middle assembly or counterweight made of plastic materials, it can have the effects of adjusting the counterweight and shock absorption, thus achieving convenient and practical overall structure.

[0011] The main purpose of this utility model is to provide a badminton racket frame and shaft connection structure. The structure design, in which the shaft extends to both the outer edge and inner circle of the frame and is connected at the same time, can make power transmission more efficient and enhance attack power.

[0012] A secondary objective of this invention is to provide a badminton racket frame and shaft connection structure. The structural design, which connects the outer and inner edges of the frame with an extended shaft, can effectively control the left and right swing of the frame, thereby improving the stability and accuracy of the shot. At the same time, the extension of the shaft moves its bending point upward, which can increase the landing angle and make the shot more powerful when smashing.

[0013] Another objective of this utility model is to provide a badminton racket frame and shaft connection structure. Through the counterweight structure, different weights can be replaced as needed, or counterweight pellets can be added inside the shaft to achieve an adjustable counterweight effect.

[0014] Another objective of this utility model is to provide a badminton racket frame and shaft connection structure, which has various components or counterweights made of plastic material, and can simultaneously achieve shock absorption effect.

[0015] Furthermore, a handle is attached to the other end of the tube.

[0016] Furthermore, the end face of the screw connector is provided with a tool drive part for tool engagement, the tool drive part having a groove of a preset shape.

[0017] Furthermore, the tool's drive unit can be any one of the following shapes: cross-shaped, straight, quadrilateral, or hexagonal.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. The counterweight assembly has a screw-in middle part and counterweight structure, which can be replaced with different weights as needed to achieve the effect of adjustable counterweight. This solves the problem that the existing badminton racket three-way structure with counterweight only has a single counterweight weight, which cannot be replaced or adjusted, and requires the purchase of multiple badminton rackets of different weights, resulting in many problems in terms of cost budget and storage.

[0020] 2. If at least one of the components, such as the middle kit or the counterweight, is made of thermoplastic or thermosetting material, the counterweight component can achieve a shock absorption effect, thus achieving both the effects of weight distribution and shock absorption. Attached Figure Description

[0021] Figure 1 This is a perspective view of a preferred embodiment of the present utility model.

[0022] Figure 2 This is a three-dimensional exploded view of a preferred embodiment of the present invention.

[0023] Figure 3 This is a cross-sectional view of a preferred embodiment of the present invention. Figure 1 .

[0024] Figure 4 This is a cross-sectional view of a preferred embodiment of the present invention. Figure 2 .

[0025] Figure 5 This is a cross-sectional schematic diagram of the second embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 10. Racquet frame; 11. Middle of frame; 20. Center tube; 30. Counterweight assembly; 31. Center kit; 32. Counterweight component; 321. Threaded connector; 322. Threaded section; 33. Tool drive unit; 34. Counterweight pellet; 40. Grip component. Detailed Implementation

[0028] First, please refer to... Figures 1 to 3 The present invention provides a badminton racket frame and tube connection structure, which includes: a racket frame 10, a tube 20 and a counterweight assembly 30 disposed on the racket frame 10.

[0029] The frame 10 is a closed ring-shaped frame, with a frame middle 11 in a preset part.

[0030] The central tube 20 is long and rod-shaped, with one end fixed to the inner part 11 of the frame. It extends from the outer edge of the frame 10 into the inner part 11. The end of the central tube 20 that is fixed to the inner part 11 is defined as the fixed end, and the edge of the fixed end of the central tube 20 is aligned with the inner edge of the frame 10. It should be noted that this utility model mainly refers to the frame 10 made of carbon fiber composite material. The carbon fiber frame 10 is made by wrapping a hardened carbon fiber central tube 20 with an unhardened carbon fiber frame 10, and then heating and hardening it in a mold.

[0031] The counterweight assembly 30 has a middle sleeve 31 located inside the fixed end of the middle tube 20; a counterweight 32 is screwed into the middle sleeve 31; the counterweight 32 has a screw joint 321 with a larger outer diameter and a screw connection section 322 with a smaller outer diameter; the screw joint 321 and the screw connection section 322 are coaxial and are adjacent to each other with a convex stepped surface (not shown in the figure);

[0032] During assembly, the counterweight 32 passes through the inner edge of the racket frame 10 via the screw-in section 322 and is then screwed into the middle assembly 31. After the counterweight 32 is screwed into the middle assembly 31, the convex surface of the counterweight 32 will simultaneously abut against the end faces of the middle tube 20 and the middle assembly 31, as well as the inner edge wall of the racket frame 10. The end face of the screw-in section 321 is provided with a tool drive part 33 for tool engagement, which is a groove of a preset shape. The shape of the tool drive part 33 can be one of the following: cross-shaped, straight, quadrilateral, or hexagonal. The counterweight 32 is made of metal.

[0033] A grip piece 40 is located at the other end of the central tube 20.

[0034] With the above-mentioned components, the middle kit 31 and the counterweight 32 are designed with a screw connection structure. When the weight needs to be adjusted, the counterweight 32 can be screwed out and replaced with another counterweight 32 of different weight and screwed into the middle kit 31. The replacement is then completed. Therefore, it has the effect of adjusting the counterweight weight. If one or both of the middle kit 31 or the counterweight 32 are made of plastic material, a shock absorption effect can be achieved. Therefore, the overall structure is practical.

[0035] To further understand the structural features, technical means, and expected effects of this utility model, the usage of this utility model is described below:

[0036] The counterweights (metal particles) and the middle assembly of this invention can be made of metal, such as steel, iron, aluminum, copper, titanium, or one of the aforementioned metal alloys; the counterweights and the middle assembly can also be made of thermoplastic materials, such as polyamide, nylon PA, polyacetal, plastic steel POM, polybutylene terephthalate PBT, polycarbonate PC, polyoxymethylene PPO, polyimide PI, polysulfide xylene PPS, liquid crystal polymer LCP, polytetrafluoroethylene PTFE, polyetherketone PEEK, polyaromatic ester PAR, polysulfone PSF, polyethersulfone PES, polyetherimide PEI, polyetheramine imide PAI, acrylonitrile-butadiene-styrene copolymer ABS, etc.; the counterweights and the middle assembly can also be made of thermosetting materials, such as phenolic resin PF, urea resin UF, melamine resin MF, epoxy resin EP, unsaturated polyester UP, polyurethane resin PU, silicone resin, silicone, diacrylate PDAP, etc.

[0037] In this invention, each of the intermediate components 31 and the central tube 20 are fixedly connected to each other. Appropriate processing methods such as tight fitting, adhesive bonding, welding, or riveting can be used to securely connect them. Each intermediate component 31 and the counterweight 32 are pre-processed to form internal and external threads that allow for mutual screwing. During assembly, the intermediate component 31 and the central tube 20 are fixed into the middle 11 of the frame 10 from the outer edge, with the end edge of the fixed end of the central tube 20 aligned with the inner edge of the frame 10. Then, the counterweight 32 is inserted into the intermediate component 31 from the inner edge of the frame 10 and screwed in until the convex surface of the counterweight 32 simultaneously abuts against the end faces of the central tube 20 and the intermediate component 31, and against the inner wall of the frame 10. The assembly is then complete.

[0038] When adjusting the weight of the counterweight, please refer to the following: Figures 3 to 4 Prepare another counterweight 32 of the required weight in advance, such as Figure 4 The counterweight 32 has a longer screw section 33 and is heavier. After inserting a tool into the tool drive part 33, the counterweight 32 is loosened clockwise until it leaves the middle kit 31 and is removed. The heavier counterweight 32 is screwed into the middle kit 32, and the operation of replacing the counterweight 32 to adjust the weight is completed.

[0039] This utility model utilizes the screw-connected structure of each component 31 and the counterweight 32, forming a two-piece detachable assembly. This, combined with the structural design that securely fixes the component 31 within the central tube 20, achieves the following effects:

[0040] I. The structural design of this utility model, in which the central tube 20 extends to both the outer and inner edges of the frame 10 and is simultaneously connected, can make the force transmission more efficient and enhance the attack energy.

[0041] Second, by utilizing the extended central tube 20 to connect the outer edge and inner edge of the racket frame 10, the left and right swing of the racket frame can be effectively controlled, thereby improving the stability and accuracy of the shot.

[0042] Third, the present invention uses the structure design of extending the middle tube 20 to connect the outer edge and inner edge of the racket frame 10. Because the middle tube 20 extends into the racket frame 10, the center of gravity of the racket is raised, causing the bending point to move upward. The accuracy of hitting the ball is improved, which will increase the landing angle. This makes the bending point move upward, which can increase the landing angle. When smashing, the landing angle of the ball becomes smaller, making it more lethal.

[0043] Fourth, the counterweight assembly 30 of this utility model has a structure in which the middle part 31 and the counterweight 32 are screwed together. The counterweight 32 of different weights can be replaced as needed to achieve the effect of adjustable counterweight. This solves the problem that the existing badminton racket three-way structure with counterweight only has a single counterweight weight, which cannot be replaced or adjusted. This leads to the need to purchase multiple badminton rackets of different weights, resulting in many problems in terms of cost budget and storage.

[0044] V. This utility model has a middle component 31 or a counterweight 32 made of plastic material. At least one of the two components is made of thermoplastic or thermosetting material, which can enable the counterweight component 30 to achieve a shock absorption effect, and at the same time achieve the dual effects of counterweight and shock absorption.

[0045] VI. The counterweight component 30 of this utility model has a simple structure, is quick and easy to assemble, and can greatly reduce manufacturing costs.

[0046] 7. When each counterweight or intermediate component is made of plastic material, the plasticity of the material under normal temperature and static load, as well as its ability to be processed or formed by die forging, stamping, extrusion, etc., gives it strong impact resistance and vibration resistance. Therefore, each counterweight and intermediate component further has the function of buffering and shock absorption.

[0047] 8. This utility model allows for the replacement of counterweights of different weights as needed, making counterweight replacement and maintenance operations easy and convenient, and demonstrating excellent practicality.

[0048] 9. The counterweight component of this utility model has a simple structure, is quick and easy to assemble, and can greatly reduce manufacturing costs.

[0049] Please refer to Figure 5 This is the second embodiment of the present invention, wherein the counterweight component 30 further comprises a plurality of counterweight particles 34 disposed within the central tube 20, and a preset number of counterweight particles can be placed according to counterweight requirements. The structural design of embedding each counterweight particle 34 within the central tube 20 in this embodiment can generate acceleration kinetic energy during swinging and improve the stability and accuracy of the shot. Each counterweight particle 34 can be a high-density metal particle or other plastic material.

[0050] In summary, the badminton racket frame and shaft connection structure disclosed in this utility model provides a weight component 30 that can adjust the weight and also has a shock absorption effect. The weight component, which uses a screw-in structure, is fixed inside the shaft along with the shaft assembly. When the weight needs to be adjusted, the weight component can be screwed out and replaced with another weight component of different weights and screwed into the shaft assembly. Since the shaft assembly and the weight component are made of plastic material, it can simultaneously achieve weight adjustment, shock absorption, and enhanced attack energy. It can also improve the stability and accuracy of the shot, increase the landing angle, and make it more lethal. In addition, it can reduce the purchase cost of the racket, reduce the manufacturing cost, and make it quick and easy to replace the weight.

[0051] It should be noted that the above description is a specific embodiment of the present utility model and the technical principle used therein. If any changes are made according to the concept of the present utility model, and the resulting functions do not exceed the spirit covered by the specification and drawings, they should be described within the scope of the present utility model.

Claims

1. A badminton racket frame and shaft connection structure, comprising: A racket frame, in the form of a ring, has a central tube of a predetermined length connected to a predetermined portion therefrom, characterized in that: The racket frame has a central frame, and a central tube is fixed to the central frame at one end. The central tube is fixed into the central frame from the outer edge of the racket frame. The end edge of the fixed end of the central tube is aligned with the inner edge of the racket frame. A counterweight assembly is provided inside the fixed end of the central tube, including a central sleeve and a counterweight. The counterweight is screwed into the central sleeve. The counterweight has a threaded joint with a larger outer diameter and a threaded section with a smaller outer diameter. The threaded joint and the threaded section are coaxial and are adjacent to each other with a convex stepped surface. After the counterweight is screwed into the central sleeve, the convex stepped surface will simultaneously abut against the end faces of the central tubes, the central sleeve, and the inner edge wall of the racket frame.

2. The racket frame and shaft connection structure of claim 1, wherein A handle is attached to the other end of the tube.

3. The badminton racket frame and shaft connection structure according to claim 1, characterized in that, The end face of the screw connector is provided with a tool drive part for tool engagement, and the tool drive part is a groove of a preset shape.

4. The badminton racket frame and shaft connection structure according to claim 3, characterized in that, The tool's drive section can be any one of the following shapes: cross-shaped, straight, quadrilateral, or hexagonal.

5. A structure for connecting the frame and the middle tube of a badminton racket according to claim 1, wherein The counterweight can be made of any one of the following materials: metal, thermoplastic, or thermosetting.

6. The badminton racket frame and shaft connection structure according to claim 1, characterized in that, The kit can be made of any one of the following materials: metal, thermoplastic, or thermosetting.

7. The badminton racket frame and shaft connection structure according to claim 1, characterized in that, The counterweight assembly also has several counterweight particles located inside the central tube.

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