Badminton racket grip structure

Abstract

This provides a grip structure for badminton rackets. [Solution] The grip structure includes a main body 10, a front sleeve 20, and an end cap 30. The main body is a hollow tubular body, and has a lumen and a shaft passage 13 inside. An extension tube is connected to the end of the shaft passage, and an impact-absorbing bush 40 is fitted around the outer circumference of the extension tube. The shaft is inserted into the shaft passage and the extension tube and fixed in place. The main body is a component integrally molded by injection molding, and the main body and the shaft passage are integral components with each other. When hitting the ball, the external force from the shaft is directly transmitted to the main body, providing the user with a firm feedback sensation. The lumen and impact-absorbing bush work together to suppress and reduce vibration. The grip also includes a reinforcing tube 50 positioned between the front cone portion 11 and the front sleeve of the main body.

Description

Technical Field

[0001] The present invention relates to the structure of a badminton racket, and particularly to the grip structure of a badminton racket.

Background Art

[0002] A badminton racket is composed of three main parts: a frame, a shaft, and a grip. The frame is strung with gut to form a hitting surface, and the frame is connected to the grip via the shaft. The grip of a conventional badminton racket is generally made of wood that is relatively tough and difficult to break. The reason for using wood to make the grip of a badminton racket is that in addition to the easy availability and processing of wood and its low price, wood has an excellent damping effect and is suitable for absorbing the vibrations generated during hitting the racket.

[0003] The vibration transmitted from the racket to the hand is related to many factors, and one of them is the grip. A well-known manufacturer, VICTOR Sports Co., Ltd., announced a technology called Free Core Grip and obtained a patent (Publication Number I673088) in Taiwan. In this patented technology, the material of the grip of the racket is changed from the conventional wooden material to a nano nylon material, and the internal structure of the grip is composed of a Free Core hollow tube and an X-shaped rib support structure. This design enhances the vibration absorption effect.

[0004] When a user accustomed to a conventional wooden grip uses the above-mentioned patented Free Core Grip technology, although the vibration of the grip generated during hitting can be significantly reduced, at the same time, the feedback feeling of hitting from the grip is also significantly impaired, which in turn affects the control of the user's force adjustment during hitting. Therefore, among some people, there are different opinions on the usability and evaluation of the Free Core Grip. Therefore, the balance of how to suppress vibration while giving sufficient feedback feeling remains an issue to be overcome.

Summary of the Invention

[0005] To solve the technical problems described above, a preferred embodiment of the grip structure for a badminton racket according to the present invention includes a main body, a front sleeve, and an end cap. The front sleeve is attached to a front cone located at the front of the main body, and the end cap is attached to the end of the main body. The main body is a hollow tubular body integrally molded by injection molding technology. Inside the main body are a lumen and a shaft passage. The shaft passage extends from the front end of the main body along the axis of the main body to the end of the main body. The lumen and the shaft passage are continuous along the axial direction of the main body and penetrate the main body axially. The shaft passage is located at the front of the main body, and the lumen is located at the middle and rear of the main body. The shaft passage is used for inserting the badminton racket shaft and fixing it to the main body. The inner diameter of the lumen is larger than the inner diameter of the shaft passage, the front end of the shaft passage extends toward the front end of the main body and forms a connecting tube that extends beyond the front end of the front cone, the end of the shaft passage extends toward the lumen and forms a tubular extension tube, the inner diameter of the extension tube is the same as the inner diameter of the shaft passage and is configured so that the shaft can be inserted, a gap is provided between the outer wall surface of the extension tube and the inner wall surface of the lumen, shock-absorbing bushings are fitted around the outer circumference of the extension tube and the shock-absorbing bushings are tightly packed into the gap.

[0006] Shock-absorbing bushings are made of rubber or silicone.

[0007] As a preferred embodiment of the grip structure for a badminton racket according to the present invention, the inner wall surface of the shaft passage is provided with a plurality of first ribs projecting toward the center, the plurality of first ribs are arranged at equal intervals on the circumference of the inner wall surface of the shaft passage, and the plurality of first ribs extend parallel to the axial direction of the shaft passage and are used to grip the shaft.

[0008] As a preferred embodiment of the grip structure of a badminton racket according to the present invention, a reinforcing tube and a connecting tube are included, the front end of the shaft passage extends toward the front end of the main body and constitutes a connecting tube that extends beyond the front end of the front cone, the reinforcing tube is a tubular member and is configured to include a front tube, a middle tube, and a end tube located at different positions on the same axis, the middle tube is located between the front tube and the end tube, the reinforcing tube is positioned between the front cone and the front sleeve, and the reinforcing tube and the shaft passage are connected in a coaxial relationship The pipes are connected and in communication with each other. The front cone section has a fitting groove that surrounds the outer circumference of the connecting pipe. The fitting groove extends axially from the front cone section towards the end of the main body section. The end pipe is inserted into the fitting groove by press-fitting. The front pipe protrudes from the front sleeve, and the middle pipe is fitted onto the connecting pipe and positioned between the connecting pipe and the front sleeve. The outer contour shape of the middle pipe conforms to the inner wall of the front sleeve, so that the middle pipe is tightly fixed between the front sleeve and the front cone section.

[0009] As a preferred embodiment of the grip structure for a badminton racket according to the present invention, the inner wall surface of the front tube is provided with a plurality of second ribs projecting toward the center, the plurality of second ribs are arranged at equal intervals on the circumference of the inner wall surface of the front tube, and the plurality of second ribs extend parallel to the axial direction of the front tube and are used to grip the shaft.

[0010] The advantages and effects of the shock-absorbing grip structure for badminton rackets according to this invention are as follows: The main body is a component integrally molded by injection molding technology, and the main body and the shaft passage are integral components with each other. When the ball is hit, the external force from the shaft is directly transmitted to the main body, providing the user with a firm feedback sensation, and the internal cavity and shock-absorbing bushing work together to suppress and reduce vibrations. On the other hand, the shaft is further fixed to the main body by the reinforcing tube, allowing the feedback sensation to be directly transmitted to the main body when the ball is hit.

[0011] Hereinafter, specific embodiments of the present invention, as well as its technical features and effects, will be described with reference to the drawings. [Brief explanation of the drawing]

[0012] [Figure 1] A front view of a structure according to a preferred embodiment of the present invention is shown. [Figure 2] Figure 1 shows a structural exploded view relating to the embodiment. [Figure 3] Figure 1 shows a structural cross-section at AA. [Figure 4] Figure 2 shows a structural cross-section of BB. [Figure 5] Figure 1 shows a side view of the structure according to the embodiment. [Figure 6] A structural front view of another preferred embodiment of the present invention is shown. [Figure 7] Figure 6 shows a structural exploded view relating to the embodiment. [Figure 8] Figure 6 shows a structural cross-section of CC. [Modes for carrying out the invention]

[0013] First, please refer to Figures 1 to 3. Figures 1 to 3 show a front view, an exploded view, and a cross-sectional view of a preferred embodiment of the present invention. A preferred embodiment of the grip structure of a badminton racket according to the present invention includes a main body 10, a front sleeve 20, an end cap 30, and a shock-absorbing bush 40.

[0014] The front sleeve 20 is attached to the front cone portion 11 located in front of the main body portion 10. In a preferred embodiment, the front cone portion 11 of the main body portion 10 has a fitting groove 110, which extends axially from the front cone portion 11 of the main body portion 10 toward the end of the main body portion 10. A sleeve 21 is provided inside the front sleeve 20, and the sleeve 21 is insertable to correspond to the fitting groove 110. The front sleeve 20 is bonded to the front cone portion 11 with adhesive. The end cap 30 is attached to the end of the main body portion 10. The shape of the front cone portion 11 of the main body portion 10 is conical, and the front sleeve 20 also has a corresponding conical shape and can be fitted onto the front cone portion 11 of the main body portion 10. The main body portion 10 is a hollow tubular body, preferably having an irregular octagonal cross-sectional shape (see Figure 5). The main body portion 10 is a component integrally molded by injection molding technology. Inside the main body portion, there is a lumen 12 and a shaft passage 13. The shaft passage 13 extends from the front end of the main body portion 10 along the axis of the main body portion 10 to the end of the main body portion 10. The lumen 12 and the shaft passage 13 are continuous along the axial direction of the main body portion 10 and penetrate the main body portion 10 in the axial direction.

[0015] Preferably, the shaft passage 13 is located in the front position of the main body 10, and the lumen 12 is located in the middle to rear position of the main body 10. In one preferred embodiment, the length of the shaft passage 13 is approximately 30% to 40% of the total length of the main body 10, from the front end of the main body 10.

[0016] The shaft passage 13 is used for inserting the shaft (also called "intermediate shaft" in Chinese) of a badminton racket and fixing it to the main body 10. In one preferred embodiment, the cross-sectional shape of the lumen 12 is circular, and the inner diameter D1 of the lumen 12 is larger than the inner diameter D2 of the shaft passage 13. The end of the shaft passage 13 (the end closer to the lumen 12) extends toward the lumen 12 to form a tubular extension tube 14. The inner diameter of the extension tube 14 is the same as the inner diameter D2 of the shaft passage 13, and it is configured so that a shaft can be inserted. A gap G is provided between the outer wall surface of the extension tube 14 and the inner wall surface of the lumen 12 (see Figure 4).

[0017] An impact-absorbing bush 40 is provided inside the main body 10, which is fitted onto the outer circumference of the extension tube 14 and densely filled in the gap G. In a preferred embodiment, the impact-absorbing bush 40 is made of rubber or silicone to absorb vibrations. Since the main body 10 is a component integrally molded by injection molding technology, the main body 10 and the shaft passage 13 are integral components with each other, so that the external force from the shaft is directly transmitted to the main body 10 when the ball is hit, giving the user a firm feedback feeling, and the lumen 12 and the impact-absorbing bush 40 can work together to suppress and reduce vibrations.

[0018] In a preferred embodiment, the inner wall surface of the shaft passage 13 is provided with a plurality of first rib portions 15 projecting toward the center. In a preferred embodiment, there are a total of six first rib portions 15, which are arranged at equal intervals on the circumference of the inner wall surface of the shaft passage 13. The first rib portions 15 extend parallel to the axial direction of the shaft passage 13 and are used to clamp the shaft. The function of the first rib portions 15 is to improve the tightness of the connection with the shaft and to reduce vibration when the force applied to the shaft is transmitted to the main body portion 10.

[0019] Please refer to Figures 6 to 8. In another preferred embodiment of the grip structure of a badminton racket according to the present invention, the difference from the structure of the embodiment shown in Figures 1 to 5 is that it further includes a reinforcing tube 50 and a connecting tube 16. The front end of the shaft passage 13 extends toward the front end of the main body 10 and constitutes a connecting tube 16 that extends beyond the front end of the front cone 11. The reinforcing tube 50 is a tubular member and is configured to include a front pipe 51, a middle pipe 52, and a end pipe 53 located at different positions on the same axis, with the middle pipe 52 located between the front pipe 51 and the end pipe 53, and the reinforcing tube 50 is positioned between the front cone 11 and the front sleeve 20 of the main body 10, and the reinforcing tube 50 and the shaft passage 13 are connected in a coaxial relationship and communicate with each other. The fitting groove 110 surrounds the outer circumference of the connecting pipe 16, and the fitting groove 110 enters the main body 10 axially from the front cone portion 11 of the main body 10 toward the end of the main body 10. Referring to Figure 8, preferably, the opening of the fitting groove 110 forms a fitting groove that gradually narrows, the end pipe 53 of the reinforcing pipe 50 is inserted into the fitting groove 110 by press fitting, the front pipe 51 passes through the sleeve 21 inside the front sleeve 20 and protrudes forward from the front sleeve 20, and the middle pipe 52 is fitted onto the connecting pipe 16 and positioned between the connecting pipe 16 and the front sleeve 20 (see Figure 8). The outer contour shape of the middle pipe 52 conforms to the inner wall of the front sleeve 20, and the middle pipe 52 is fixed in close contact between the front sleeve 20 and the front cone portion 11 of the main body 10 by the sleeve 21 inside the front sleeve 20 contacting the middle pipe 52. This allows feedback to be directly transmitted to the main unit 10 when the ball is hit.

[0020] In a preferred embodiment, a plurality of second rib portions 511 protruding in the central direction are provided on the inner wall surface of the front stage pipe 51. In a preferred embodiment, there are a total of six second rib portions 511, which are arranged at equal intervals on the circumference of the inner wall surface of the front stage pipe 51. The second rib portions 511 extend parallel to the axial direction of the front stage pipe 51 and are used to sandwich the shaft. The second rib portions 511 can cooperate with the first rib portions 15 to reduce the vibration when the force applied by the shaft is transmitted to the main body portion 10, and can directly transmit the feedback feeling to the main body portion 10 during hitting the ball. In a preferred embodiment, the shaft of the badminton racket can be fixed to the shaft passage 13 and the reinforcing pipe 50 by an adhesive.

[0021] Although the present invention is disclosed by the above embodiments, these do not limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the scope of claims for utility model registration attached to this specification.

Description of Reference Numerals

[0022] D1 Inner diameter D2 Inner diameter G Gap 10 Main body portion 11 Front cone portion 110 Fitting groove 12 Inner cavity 13 Shaft passage 14 Extension pipe 15 First rib portion 16 Connection pipe 20 Front sleeve 21 Sleeve 30 End cap 40 Impact absorption bush 50 Reinforcing pipe 51 Front stage pipe 511 Second rib portion 52 Middle stage pipe 53 End pipe

Claims

1. A badminton racket grip structure comprising a main body, a front sleeve, and an end cap, wherein the front sleeve is attached to a front cone portion located in front of the main body, and the end cap is attached to the end of the main body, The main body has a lumen and a shaft passage, the shaft passage extends from the front end of the main body along its axis to the end of the main body, the lumen and the shaft passage are continuous along the axial direction of the main body and penetrate the main body axially, the shaft passage is used for inserting a badminton racket shaft and fixing it to the main body, the inner diameter of the lumen is larger than the inner diameter of the shaft passage, the front end of the shaft passage extends toward the front end of the main body and forms a connecting tube that extends beyond the front end of the front cone, the end of the shaft passage extends toward the lumen to form a tubular extension tube, the inner diameter of the extension tube is the same as the inner diameter of the shaft passage and is configured to allow insertion of the shaft, a gap is provided between the outer wall surface of the extension tube and the inner wall surface of the lumen, shock-absorbing bushings are fitted around the outer circumference of the extension tube and the shock-absorbing bushings are densely packed into the gap A badminton racket grip structure characterized by the following.

2. The shock-absorbing bush is made of rubber or silicone. The grip structure of the badminton racket according to feature 1.

3. The inner wall surface of the shaft passage is provided with a plurality of first ribs projecting toward the center, and these plurality of first ribs are arranged at equal intervals on the circumference of the inner wall surface of the shaft passage, and these plurality of first ribs extend parallel to the axial direction of the shaft passage and are used to clamp the shaft. The grip structure of the badminton racket according to feature 1.

4. The shaft passage includes a reinforcing pipe and a connecting pipe, the front end of the shaft passage extends toward the front end of the main body and constitutes the connecting pipe that extends beyond the front end of the front cone, the reinforcing pipe is a tubular member, the reinforcing pipe is configured to include a front pipe, a middle pipe, and a end pipe located at different positions on the same axis, the middle pipe is located between the front pipe and the end pipe, the reinforcing pipe is positioned between the front cone and the front sleeve, the reinforcing pipe and the shaft passage are connected in a coaxial relationship and communicate with each other, and the front The cone portion has a fitting groove surrounding the outer circumference of the connecting pipe, the fitting groove extends axially from the front cone portion toward the end of the main body portion, the end pipe is inserted into the fitting groove by press-fitting, the front pipe protrudes from the front sleeve, the middle pipe is fitted onto the connecting pipe and positioned between the connecting pipe and the front sleeve, the outer contour shape of the middle pipe conforms to the inner wall of the front sleeve, so that the middle pipe is tightly fixed between the front sleeve and the front cone portion. The grip structure of the badminton racket according to feature 1.

5. The inner wall surface of the preceding pipe is provided with a plurality of second ribs projecting toward the center, the plurality of second ribs are arranged at equal intervals on the circumference of the inner wall surface of the preceding pipe, and the plurality of second ribs extend parallel to the axial direction of the preceding pipe and are used to clamp the shaft. The grip structure of the badminton racket according to feature 4.

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