One-piece badminton racket and its manufacturing method

Abstract

This invention discloses an integrated badminton racket and its manufacturing method. The integrated badminton racket includes a frame, a shaft, a connecting sleeve, and a handle. The front end of the shaft is connected to the frame, and the shaft is made of carbon fiber. The connecting sleeve fits onto the rear end of the shaft. The inner wall of the connecting sleeve and the outer rear end wall of the shaft are engaged and integrally fixed together by a first locking position and a first locking protrusion. By pre-fabricating and curing the connecting sleeve, the frame, shaft, and handle are formed again. The inner wall of the connecting sleeve and the outer rear end wall of the shaft are engaged by a first locking position and a first locking protrusion, and the inner wall of the handle and the outer wall of the connecting sleeve are engaged by a second locking position and a second locking protrusion. This makes the connection between the shaft and the handle more stable and less prone to detachment, improving product quality, greatly extending the product's service life, and significantly increasing production efficiency, which is conducive to increasing production capacity. At the same time, the overall weight of this product is lighter and the feel is better.

Description

Technical Field

[0001] This invention relates to the field of sporting goods, and in particular to an integrated badminton racket and its manufacturing method. Background Technology

[0002] Badminton is a sport that can be played both indoors and outdoors. Depending on the number of participants, it can be divided into singles, doubles, and the emerging 3-on-3 rule. Badminton requires a badminton racket, which consists of a frame, handle, and shaft. The racket face is woven into the frame by net strings, and the front and back ends of the shaft connect to the frame and handle, respectively. A badminton racket is no longer than 680 mm, with the handle and shaft not exceeding 41 cm, and the frame being 28 cm long and 23 cm wide. Badminton rackets are high-powered sports equipment, characterized by: less material used, high net tension on the frame, and significant shaft deformation upon impact. World-renowned brands in the field of high-performance badminton rackets strive for breakthroughs in manufacturing processes and structural design to lead the market.

[0003] In current technology, badminton racket handles are generally made of wood, while the shaft is made of iron or carbon fiber. During manufacturing, the handle has a pre-formed insertion hole, and the shaft is pre-shaped. During assembly, the rear end of the shaft is inserted into the insertion hole and glued in place. However, due to the limited bonding strength of the glue and its tendency to age, the shaft can easily come loose, damaging the racket. Furthermore, this glue-gluing method is very inefficient, hindering production capacity. Additionally, the use of wood for the handle and iron for the shaft results in a heavy racket with a poor feel. Therefore, it is necessary to improve current badminton racket technology. Summary of the Invention

[0004] In view of this, the present invention addresses the deficiencies of the existing technology, and its main objective is to provide an integrated badminton racket and its manufacturing method, which can effectively solve the problems of existing badminton rackets being easily damaged, not conducive to increasing production capacity, and heavy.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A one-piece badminton racket includes a frame, a shaft, a connecting sleeve, and a handle. The front end of the shaft is connected to the frame. The shaft is made of carbon fiber and has a flow channel for fluid injection. The connecting sleeve is a hollow structure with openings at both ends. The connecting sleeve fits onto the rear end of the shaft. The inner wall of the connecting sleeve and the outer wall of the rear end of the shaft are engaged and integrally fixed together by a first locking position and a first locking protrusion. The handle fits onto the connecting sleeve. The rear end of the handle has a through hole for fluid injection, which connects to the flow channel. The inner wall of the handle and the outer wall of the connecting sleeve are engaged by a second locking position and a second locking protrusion.

[0007] As a preferred embodiment, the first locking position is located on the inner wall of the connecting sleeve, and the corresponding first locking protrusion is formed by the middle tube being squeezed and extended out of the outer wall. The second locking position is located on the outer wall of the connecting sleeve, and the corresponding second locking protrusion is formed by the handle being squeezed and extended out of the inner wall.

[0008] As a preferred embodiment, the second card slot is connected to the first card slot, and the second card protrusion is integrally formed and connected to the first card protrusion.

[0009] As a preferred embodiment, the connecting sleeve has an inner concave and an outer convex shape, forming a first locking position on the inner wall of the connecting sleeve and a second locking protrusion on the outer wall of the connecting sleeve. Correspondingly, the first locking protrusion is formed by the extrusion of the middle tube extending out of the outer wall, and the second locking position is located on the inner wall of the handle.

[0010] As a preferred embodiment, the connecting sleeve has an inner convex and an outer concave shape, with a first locking protrusion formed on the inner wall of the connecting sleeve and a second locking position formed on the outer wall of the connecting sleeve. Correspondingly, the first locking position is formed by the compression of the middle tube to the inward concavity, and the second locking protrusion is located on the inner wall of the handle.

[0011] As a preferred embodiment, the connecting sleeve is formed by curing carbon fiber.

[0012] As a preferred embodiment, both the inner and outer walls of the handle are made of carbon fiber.

[0013] A method for manufacturing an integrated badminton racket, characterized by comprising the following steps:

[0014] (1) A prefabricated and cured connecting sleeve is provided, wherein the inner wall of the connecting sleeve has a first locking position or a first locking protrusion, and the outer wall of the connecting sleeve has a second locking position or a second locking protrusion.

[0015] (2) Take out the core, put a plastic bag over the core, and then wrap the plastic bag with carbon fiber cloth to preform the middle tube;

[0016] (3) Connect the front end of the pre-formed middle tube to the frame, and insert the rear end of the middle tube into the connecting sleeve;

[0017] (4) The racket handle is pre-formed outside the connecting sleeve to obtain a semi-finished product;

[0018] (5) Place the semi-finished product into the mold and heat it to solidify the middle tube and the handle. During the heating process, fill the plastic bag with fluid to expand the plastic bag and pressurize the inner wall of the middle tube so that the middle tube is adhered to and solidified on the inner wall of the connecting sleeve and the handle is adhered to and solidified on the outer wall of the connecting sleeve.

[0019] (6) After the middle tube and handle are cured, the front and rear ends of the middle tube are integrally connected with the frame, connecting sleeve and handle respectively. Open the mold and take out the finished product.

[0020] As a preferred option, the fluid in step (5) is a gas.

[0021] As a preferred embodiment, the plastic bag extends outward through the through-hole to the handle.

[0022] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution:

[0023] By first prefabricating and curing the connecting sleeve, the frame, shaft, and handle are then formed. The inner wall of the connecting sleeve and the outer wall of the rear end of the shaft are held together by a first locking position and a first locking protrusion. The inner wall of the handle and the outer wall of the connecting sleeve are held together by a second locking position and a second locking protrusion. This makes the connection between the shaft and the handle more stable and less prone to detachment, improving product quality, greatly extending the product's service life, and significantly increasing production efficiency, which is conducive to increasing production capacity. At the same time, the overall weight of this product is lighter and the feel is better.

[0024] To more clearly illustrate the structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0025] Figure 1 This is a front view of the first preferred embodiment of the present invention;

[0026] Figure 2 This is a partial cross-sectional view of the first preferred embodiment of the present invention before overall curing;

[0027] Figure 3 This is a partial cross-sectional view of the entire structure after curing in the first preferred embodiment of the present invention;

[0028] Figure 4 This is a front view of the connecting sleeve in the first preferred embodiment of the present invention;

[0029] Figure 5 This is a front view of another connecting sleeve in the first preferred embodiment of the present invention;

[0030] Figure 6 This is a partial cross-sectional view of the second preferred embodiment of the present invention before overall curing;

[0031] Figure 7 This is a partial cross-sectional view of the entire structure after curing in the second preferred embodiment of the present invention;

[0032] Figure 8 This is a partial cross-sectional view of the third preferred embodiment of the present invention before overall curing;

[0033] Figure 9 This is a partial cross-sectional view of the entire structure after curing in the third preferred embodiment of the present invention.

[0034] Explanation of reference numerals in the attached diagram:

[0035] 10. Frame 20. Shaft

[0036] 21. Flow channel; 30. Connecting sleeve

[0037] 40. Handle; 41. Through hole

[0038] 50. Plastic bag 101. First card slot

[0039] 102. First card protrusion; 103. Second card slot

[0040] 104. Second card protrusion. Detailed Implementation

[0041] Please refer to Figures 1 to 5 As shown, it illustrates the specific structure of the integrated badminton racket of the first preferred embodiment of the present invention, including a frame 10, a shaft 20, a connecting sleeve 30, and a handle 40.

[0042] The front end of the central tube 20 is connected to the frame 10. The central tube 20 is made of carbon fiber and has a flow channel 21 for fluid filling. The connecting sleeve 30 is a hollow structure with openings at both ends. The connecting sleeve 30 is fitted onto the outer rear end of the central tube 20. The inner wall of the connecting sleeve 30 and the outer rear end wall of the central tube 20 are engaged and fixed together by the first locking position 101 and the first locking protrusion 102. The handle 40 is fitted onto the connecting sleeve 30. The rear end of the handle 40 has a through hole 41 for fluid filling. The through hole 41 connects to the flow channel 21. The inner wall of the handle 40 and the outer wall of the connecting sleeve 30 are engaged and fixed together by the second locking position 103 and the second locking protrusion 104.

[0043] In this embodiment, the first locking position 101 is located on the inner wall of the connecting sleeve 30, and the corresponding first locking protrusion 102 is formed by the extrusion of the central tube 20 extending outward from the outer wall. The second locking position 103 is located on the outer wall of the connecting sleeve 30, and the corresponding second locking protrusion 104 is formed by the extrusion of the handle 40 extending outward from the inner wall. Furthermore, the second locking position 103 and the first locking position 101 are interconnected, and the second locking protrusion 104 and the first locking protrusion 102 are integrally formed and connected, achieving a better and more stable connection. The connecting sleeve 30 is formed by curing carbon fiber. The inner and outer walls of the handle 40 are both made of carbon fiber. Also, the first locking position 101 can be square, circular, or other various shapes; correspondingly, the first locking protrusion 102 can be square, circular, or other various shapes, and the second locking position 103 can be square (e.g., square, circular ... Figure 4 As shown), circular (as shown) Figure 5 (as shown) or other various shapes, corresponding to the second card protrusion 104 being square, circular, or other various shapes, the shape being limited. There are multiple first card positions 101, and correspondingly, there are multiple first card protrusions 102, the number of which is unlimited; there are multiple second card positions 103, and correspondingly, there are multiple second card protrusions 104, the number of which is unlimited.

[0044] This invention also discloses a method for manufacturing the aforementioned one-piece badminton racket, comprising the following steps:

[0045] (1) The connecting sleeve 30 is prefabricated and cured. The inner wall of the connecting sleeve 30 has a first locking position 101 or a first locking protrusion 102, and the outer wall of the connecting sleeve 30 has a second locking position 103 or a second locking protrusion 104.

[0046] (2) Take out the core, put the plastic bag 50 on the core, and then wrap the plastic bag 50 with carbon fiber cloth to form the central tube 20.

[0047] (3) Connect the front end of the pre-formed middle tube 20 to the frame 10, and insert the rear end of the middle tube 20 into the connecting sleeve 30.

[0048] (4) The handle 40 is pre-formed outside the connecting sleeve 30 to obtain a semi-finished product.

[0049] (5) The semi-finished product is placed in a mold and heated to solidify the central tube 20 and the handle 40. During the heating process, fluid is injected into the plastic bag 50, causing the plastic bag 50 to expand and pressurize the inner wall of the central tube 20, so that the central tube 20 is adhered to and solidified on the inner wall of the connecting sleeve 30, and the handle 40 is adhered to and solidified on the outer wall of the connecting sleeve 30. In this embodiment, the fluid is a gas, but it can also be a liquid, and is not limited thereto.

[0050] (6) After the middle tube 20 and the handle 40 are cured, the front and rear ends of the middle tube 20 are integrally formed and connected to the frame 10, the connecting sleeve 30 and the handle 40 respectively. The mold can be opened and the finished product can be taken out. In this embodiment, the plastic bag 50 extends outward through the through hole 41 to the handle 40.

[0051] Please refer to Figure 6 and Figure 7 As shown, it illustrates the specific structure of the integrated badminton racket according to the second preferred embodiment of the present invention. The specific structure of this embodiment is basically the same as that of the first preferred embodiment described above, except that:

[0052] In this embodiment, the connecting sleeve 30 has an inner concave and an outer convex shape, and a first locking position 101 is formed on the inner wall of the connecting sleeve 30. A second locking protrusion 104 is formed on the outer wall of the connecting sleeve 30. Correspondingly, the first locking protrusion 102 is formed by the extrusion of the middle tube 20 extending out of the outer wall, and the second locking position 103 is located on the inner wall of the handle 40.

[0053] The manufacturing method of this embodiment is basically the same as that of the first preferred embodiment described above, and the manufacturing method of this embodiment will not be described in detail here.

[0054] Please refer to Figure 8 and Figure 9 As shown, it illustrates the specific structure of the integrated badminton racket according to the third preferred embodiment of the present invention. The specific structure of this embodiment is basically the same as that of the first preferred embodiment described above, except that:

[0055] In this embodiment, the connecting sleeve 30 has an inner convex and an outer concave shape, and a first locking protrusion 102 is formed on the inner wall of the connecting sleeve 30. A second locking position 103 is formed on the outer wall of the connecting sleeve 30. Correspondingly, the first locking position 101 is formed by the compression of the middle tube 20 and is recessed inward. The second locking protrusion 104 is located on the inner wall of the handle 40.

[0056] The manufacturing method of this embodiment is basically the same as that of the first preferred embodiment described above, and the manufacturing method of this embodiment will not be described in detail here.

[0057] The key design feature of this invention is that by first prefabricating and curing the connecting sleeve, the frame, middle tube, and handle are then formed. The inner wall of the connecting sleeve and the outer wall of the rear end of the middle tube are engaged by a first locking position and a first locking protrusion, and the inner wall of the handle and the outer wall of the connecting sleeve are engaged by a second locking position and a second locking protrusion. This makes the connection between the middle tube and the handle more stable and less prone to detachment, improving product quality, greatly extending the product's service life, and significantly increasing production efficiency, which is conducive to increasing production capacity. At the same time, the overall weight of this product is lighter and the feel is better.

[0058] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. An integrated badminton racket, characterized by: The racket includes a frame, a middle tube, a connecting sleeve, and a handle. The front end of the middle tube is connected to the frame. The middle tube is made of carbon fiber and has a flow channel for fluid injection. The connecting sleeve is a hollow structure with openings at both ends. The connecting sleeve fits around the rear end of the middle tube. The inner wall of the connecting sleeve and the outer wall of the rear end of the middle tube are engaged and integrally fixed together by a first locking position and a first locking protrusion. The handle fits around the connecting sleeve. The rear end of the handle has a through hole for fluid injection, which connects to the flow channel. The inner wall of the handle and the outer wall of the connecting sleeve are engaged by a second locking position and a second locking protrusion.

2. The one-piece badminton racket as claimed in claim 1, wherein: The first locking position is located on the inner wall of the connecting sleeve, and the corresponding first locking protrusion is formed by the middle tube being squeezed and extended out of the outer wall. The second locking position is located on the outer wall of the connecting sleeve, and the corresponding second locking protrusion is formed by the handle being squeezed and extended out of the inner wall.

3. The one-piece badminton racket as claimed in claim 2, wherein: The second card slot is connected to the first card slot, and the second card protrusion is integrally formed and connected to the first card protrusion.

4. The one-piece badminton racket as claimed in claim 1, wherein: The connecting sleeve has an inner concave and an outer convex shape, forming a first locking position on the inner wall of the connecting sleeve and a second locking protrusion on the outer wall of the connecting sleeve. Correspondingly, the first locking protrusion is formed by the extrusion of the middle tube extending out of the outer wall, and the second locking position is located on the inner wall of the handle.

5. The one-piece badminton racket as claimed in claim 1, wherein: The connecting sleeve has an inner convex and an outer concave shape, with a first locking protrusion formed on the inner wall of the connecting sleeve and a second locking position formed on the outer wall of the connecting sleeve. Correspondingly, the first locking position is formed by the compression of the middle tube to the inward concavity, and the second locking protrusion is located on the inner wall of the handle.

6. The one-piece racquet of claim 1, wherein: The connecting sleeve is formed by curing carbon fiber.

7. The one-piece racquet of claim 1, wherein: The inner and outer walls of the handle are both made of carbon fiber.

8. A method of manufacturing a one-piece racquet according to any one of claims 1-7, characterized in that: It includes the following steps: (1) A prefabricated and cured connecting sleeve is provided, wherein the inner wall of the connecting sleeve has a first locking position or a first locking protrusion, and the outer wall of the connecting sleeve has a second locking position or a second locking protrusion. (2) Take out the core, put a plastic bag over the core, and then wrap the plastic bag with carbon fiber cloth to preform the middle tube; (3) Connect the front end of the pre-formed middle tube to the frame, and insert the rear end of the middle tube into the connecting sleeve; (4) The racket handle is pre-formed outside the connecting sleeve to obtain a semi-finished product; (5) Place the semi-finished product into the mold and heat it to solidify the middle tube and the handle. During the heating process, fill the plastic bag with fluid to expand the plastic bag and pressurize the inner wall of the middle tube so that the middle tube is adhered to and solidified on the inner wall of the connecting sleeve and the handle is adhered to and solidified on the outer wall of the connecting sleeve. (6) After the middle tube and handle are cured, the front and rear ends of the middle tube are integrally connected with the frame, connecting sleeve and handle respectively. Open the mold and take out the finished product.

9. The method of manufacturing a one-piece badminton racket as claimed in claim 8, wherein: The fluid in step (5) is a gas.

10. The method for manufacturing an integrated badminton racket according to claim 8, characterized in that: The plastic bag extends outward through the through-hole to form the handle.

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