High-elastic anti-seismic badminton middle tube
By using a multi-layer fiber main layer and foam layer design in the middle tube of the badminton racket, the problems of airflow vibration and insufficient strength caused by the existing middle tube cavity are solved, and better ball feel and wrist protection are achieved.
Patent Information
- Application Number
- CN202421104751.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-21
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-05-21
AI Technical Summary
The existing badminton racket mid tube forms a cavity inside after forming, resulting in airflow vibration during hitting, poor ball feeling, insufficient strength and torsional resistance, which can easily damage the wrist.
The middle tube design is adopted, which consists of a fiber main layer and a foam layer. The fiber main layer is stacked intersected by multiple layers of carbon fiber strips of different angles. The foam layer provides internal pressure during the molding process and fills the inner cavity of the middle tube to avoid the formation of a cavity.
It improves the elasticity and torsional strength of the middle pipe, reduces the vibration of airflow during hitting the ball, enhances the ball sense, protects the user's wrist, and simplifies the processing process.
Smart Images
Figure CN222918062U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of the middle tube of a badminton racket, in particular to a highly elastic and earthquake-resistant badminton middle tube. Background Art
[0002] A badminton racket is for sports use and generally includes a racket head, a racket shaft and a racket handle. The racket shaft, i.e., the middle tube, is used to connect the racket handle and the racket head, and provides support when swinging the badminton racket and resists torsional forces in various directions generated during the swinging process. During the production of the existing badminton middle tube, an outer mold is used in cooperation with internal wind pressure to form the middle tube. The internal wind pressure requires an air duct for injecting gas to penetrate the inner cavity of the middle tube, and then in cooperation with the pressure of the outer mold and the internal wind pressure of the expansion of the air duct, the middle tube is compacted and formed. After forming, the air duct is withdrawn, and the finished badminton racket middle tube can be obtained.
[0003] Although the above patent can solve the corresponding technical problems, there are still certain defects: after the existing badminton racket middle tube is formed, a cavity for accommodating the air duct will be formed inside it. Then, during badminton sports, when hitting the ball, air flow will be generated between the hollow middle tube and the hollow racket head, resulting in air flow vibration, making the feeling of hitting the ball poor, it is difficult to ensure the accuracy of swinging, the use experience is poor. At the same time, the strength and torsional resistance of the hollow middle tube are poor, and it is easy to generate strong vibration and damage the wrist under high-intensity use. Summary of the Utility Model
[0004] The purpose of the utility model is to provide a highly elastic and earthquake-resistant badminton middle tube with good ball feeling and vibration prevention in view of the defects and deficiencies of the prior art.
[0005] To achieve the above purpose, the utility model adopts the following technical solutions: a highly elastic and earthquake-resistant badminton middle tube includes a fiber main body layer formed by rolling at least one layer of fiber base material into a tubular or rod shape. A foaming layer is provided on the inner cavity wall of the fiber main body layer, and a hollow cavity is formed in the middle of the foaming layer for placing a core-pulling rod during its foaming molding to form the foaming layer between the core-pulling rod and the fiber main body layer.
[0006] Further improvement is that: a surface fiber main body layer is further provided on the outer wall of the fiber main body layer.
[0007] Further improvement is that: the fiber main body layer includes a first fiber main body layer with a foaming layer filled in its inner wall and a second fiber main body layer arranged on the outer wall of the first fiber main body layer.
[0008] Further improvement is that: a third fiber main body layer is further provided on the outer wall of the second fiber main body layer.
[0009] Further improvement: The first fiber main body layer includes multiple carbon fiber cloth strips bonded by resin, and the multiple carbon fiber cloth strips are cross-stacked at 30° to form the first fiber main body layer.
[0010] Further improvement: The second fiber main body layer includes multiple carbon fiber cloth strips bonded by resin, and the multiple carbon fiber cloth strips are cross-stacked at 45° to form the second fiber main body layer.
[0011] Further improvement: The third fiber main body layer includes multiple carbon fiber cloth strips bonded by resin, and the multiple carbon fiber cloth strips are parallel-stacked at 0° to form the third fiber main body layer.
[0012] Further improvement: The surface layer fiber main body layer is a glass fiber main body layer or a carbon fiber main body layer.
[0013] Further improvement: The foaming layer is a foaming resin.
[0014] Further improvement: A demoulding layer for pulling out the core rod from the hollow cavity after the foaming layer is foamed is also provided on the inner wall of the hollow cavity of the foaming layer.
[0015] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:
[0016] By filling the foaming sheet in the fiber main body layer, during the process of winding and pressing the middle tube into shape, there is no need to use an air duct, and only by directly heating and pressing the middle tube, the foaming sheet can be foamed and provide internal pressure, which simplifies the processing procedure.
[0017] The inner cavity of the middle tube after the present utility model is formed is filled with the foamed foaming sheet. Therefore, during hitting, it is not easy to generate vibrations caused by gas flow, and the ball feeling is better, thus protecting the user's wrist. At the same time, the inner cavity of the middle tube is filled with the foamed foaming sheet to provide better internal support for the middle tube.
[0018] The present utility model connects and stacks multiple fiber main body layers at different angles, so that the middle tube can cope with torques in different directions while maintaining elasticity. Therefore, while maintaining the torsional strength, no power loss will occur during hitting, and the hitting rebound speed is faster and more powerful. Description of the Drawings
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0020] Figure 1 It is a schematic structural diagram of the three-dimensional cross-section of the tube in the present utility model;
[0021] Figure 2 It is a schematic structural diagram of the front cross-section of the tube in the present utility model;
[0022] Figure 3 It is a schematic diagram of the stacked structure of the first fiber main body layer of the present utility model viewed from above;
[0023] Figure 4 It is a schematic diagram of the stacked structure of the second fiber main body layer of the present utility model viewed from above;
[0024] Figure 5 It is a schematic diagram of the stacked structure of the third fiber main body layer of the present utility model viewed from above. Specific embodiments
[0025] The present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0026] Refer to Figures 1-5As shown in the figure, the technical solution adopted in this specific embodiment is as follows: a highly elastic and earthquake-resistant badminton middle tube, which includes a fiber main body layer 10 formed by rolling at least one layer of fiber base material into a tubular or rod shape. A foaming layer 2 is provided on the inner cavity wall of the fiber main body layer 10. The middle part of the foaming layer 2 has a hollow cavity for placing a core rod during its foaming molding to form the foaming layer between the core rod and the fiber main body layer. The fiber main body layer 10 includes a first fiber main body layer 3 and a second fiber main body layer 4 provided on the outer wall of the first fiber main body layer 3. The first fiber main body layer 3 is formed by stacking multiple carbon fiber cloth strips at an angle of 30° and bonding them with resin. The second fiber main body layer 4 is formed by stacking multiple carbon fiber cloth strips at an angle of 45° and bonding them with resin. The core rod winds and lays the fiber main body layer 10 provided with the foaming layer 2 and simultaneously performs external mold hot pressing to form a tube shape, and the core rod is accommodated in the hollow cavity. The foaming layer 2 expands due to heat and generates an outward expansion force to fill the inner wall of the fiber main body layer 10 wound into a tube shape. Subsequently, the core rod is drawn out to form the shape. During use, first, the second fiber main body layer 4 of the fiber main body layer 10 is laid flat on the processing table, then the first fiber main body layer 3 is laid flat on its upper surface, and then the foaming layer 2 is laid on the first fiber main body layer 3. At this time, the processing core rod is taken out, and the foaming layer 2 together with the first fiber main body layer 3 and the second fiber main body layer 4 is wound and wrapped to form a tube shape. Subsequently, the core rod is moved into the external mold, heated and externally extruded. At this time, the foaming layer 2 expands due to heat and generates an internal pressure. Through the synchronous external pushing of the internal and external pressures, the fiber main body layer 10 is shaped into a tube shape, and at the same time, the core rod is separated from the foaming layer 2, and then the core rod can be drawn out. At this time, the finished middle tube can be obtained. The first fiber main body layer 3 stacked at 30° and the second fiber main body layer 4 stacked at 45° enable the middle tube to resist torsional forces applied from different angles, with high torsional strength, reducing the power loss during hitting. Moreover, the edges of the first fiber main body layer 3 and the second fiber main body layer 4 are mutually extruded, so that it is not easy for the two to crack under pressure. At the same time, during the processing process, there is no need to use an air duct to provide internal pressure, simplifying the processing procedure. And the foaming layer 2 fills the inner cavity of the middle tube, and it is not easy to generate vibrations caused by gas flow during hitting, making the ball feel better, thus protecting the user's wrist. At the same time, the inner cavity of the middle tube is filled with the foamed foaming sheet to provide better internal support for the middle tube. The core rod can be any rod-shaped object such as an iron core rod;
[0027] A surface layer fiber main body layer 6 is further provided on the outer wall of the fiber main body layer 10. The surface layer fiber main body layer 6 is a glass fiber main body layer or a carbon fiber main body layer, which is beneficial for grinding after processing without damaging the fiber main body layer 10, protecting the fiber main body layer 10 at the same time, and improving the smoothness of the finished middle tube;
[0028] The outer wall of the second fiber main body layer 4 is further provided with a third fiber main body layer 5. The third fiber main body layer 5 includes multiple carbon fiber cloth strips bonded by resin. The multiple carbon fiber cloth strips are stacked in parallel at 0° to form the third fiber main body layer 5, which is beneficial to further improve the strength of the finished middle tube. At the same time, the third fiber main body layer 5 stacked in parallel at 0° is used to improve the elasticity of the middle tube, making the hitting rebound speed faster and more powerful.
[0029] The foaming layer 2 is a foaming resin, which is beneficial to foaming and expanding when heated to provide internal pressure and fill the inner cavity of the middle tube, and has viscosity on the surface. When arranged on the fiber main body layer 10, it is not easy to fall off due to its own viscosity.
[0030] The inner wall of the hollow cavity of the foaming layer 2 is further provided with a demoulding layer 1 for withdrawing the core rod from the hollow cavity after the foaming layer 2 is foamed and formed. The demoulding layer 1 is a mixed layer of a demoulding agent and a resin binder, which is beneficial to making the core rod easier to detach from the processed middle tube during processing. While ensuring the demoulding effect, it has a certain viscosity to adhere to the foaming layer 2, making the connection between the processing core rod and the foaming layer 2 more firm and the shape of the middle tube more stable.
[0031] The working principle of the present utility model: When the present utility model is used, first, the second fiber main body layer 4 of the fiber main body layer 10 is laid flat on the processing table, then the first fiber main body layer 3 is laid flat on its upper surface, and then the foaming layer 2 is laid on the first fiber main body layer 3. At this time, the processing core rod is taken out, and the foaming layer 2 together with the first fiber main body layer 3 and the second fiber main body layer 4 is wound up and rolled to form a tube. Then the core rod is moved into the outer mold, heated and externally pressed. At this time, the foaming layer 2 expands due to heat, including generating internal pressure. Through the synchronous external pushing of the internal and external pressures, the fiber main body layer 10 is shaped into a tube, and at the same time, the core rod is separated from the foaming layer 2, and then the core rod can be drawn out. At this time, the finished middle tube can be obtained. The first fiber main body layer 3 stacked at 30° cross and the second fiber main body layer 4 stacked at 45° cross enable the middle tube to resist torsional forces applied from different angles, with high torsional strength, reducing the power loss during hitting. Moreover, the edges of the first fiber main body layer 3 and the second fiber main body layer 4 are mutually extruded, so that the two are not easily cracked due to pressure. At the same time, during the processing process, there is no need to use an air duct to provide internal pressure, simplifying the processing procedure. And the foaming layer 2 fills the inner cavity of the middle tube, and it is not easy to generate vibrations caused by gas flow during hitting, with a better sense of use, thus protecting the user's wrist. At the same time, the foamed foaming sheet fills the inner cavity of the middle tube to provide better internal support for the middle tube.
[0032] What the present utility model aims to protect is the structure of the product. The models of each component are not the content protected by the present utility model and are also well-known technologies. Any component that can achieve the above functions of the present utility model on the market can be selected and applied. Therefore, parameters such as the model of the component are not described in detail in the present utility model. The contribution of the present utility model lies in the scientific combination of each component.
[0033] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and descriptions only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model includes what is defined by the appended claims and their equivalents. Where the present utility model is not described in detail, it is all well-known technologies to those skilled in the art.
Claims
1. A high-elastic shock-resistant badminton middle tube, comprising at least one fiber base material layer rolled into a tube or rod shape (10), characterized in that: The inner cavity wall of the fiber main body layer (10) is provided with a foaming layer (2), and the middle part of the foaming layer (2) has a hollow cavity for placing a core pulling rod during foaming to form the foaming layer between the core pulling rod and the fiber main body layer.
2. The high-elasticity and shock-resistant badminton middle tube according to claim 1, characterized in that: The outer wall of the fiber main body layer (10) is also provided with a surface fiber main body layer (6).
3. A high-elastic shock-resistant badminton middle tube according to claim 1 or 2, characterized in that: The fiber main body layer (10) comprises a first fiber main body layer (3) and a second fiber main body layer (4) arranged on the outer wall of the first fiber main body layer (3).
4. The high-elastic shock-resistant badminton middle tube according to claim 3, characterized in that: A third fiber main layer (5) is also provided on the outer wall of the second fiber main layer (4).
5. The high-elasticity and shock-resistant badminton middle tube according to claim 3, characterized in that: The first fiber main body layer (3) comprises a plurality of carbon fiber cloth strips bonded by resin, and the plurality of carbon fiber cloth strips are cross-stacked at 30 degrees to form the first fiber main body layer (3).
6. The high-elastic shock-resistant badminton middle tube according to claim 3, characterized in that: The second fiber main body layer (4) comprises a plurality of carbon fiber cloth strips bonded by resin, and the plurality of carbon fiber cloth strips are cross-stacked at 45 degrees to form the second fiber main body layer (4).
7. The high-elastic shock-resistant badminton middle tube according to claim 4, characterized in that: The third fiber main body layer (5) comprises a plurality of carbon fiber cloth strips bonded by resin, and the plurality of carbon fiber cloth strips are stacked in parallel at 0° to form the third fiber main body layer (5).
8. The high-elastic shock-resistant badminton middle tube according to claim 2, characterized in that: The surface fiber main layer (6) is a glass fiber main layer or a carbon fiber main layer.
9. The high-elastic shock-resistant badminton middle tube according to claim 1, characterized in that: The foaming layer (2) is a foaming resin.
10. The high-elasticity and shock-resistant badminton middle tube according to claim 1, characterized in that: The inner wall of the hollow cavity of the foaming layer (2) is also provided with a demoulding layer (1) for allowing the core pulling rod to be pulled out of the hollow cavity after foaming.