Vibration-damping grip structure for badminton racket

Abstract

A vibration-damping grip structure for a badminton racket, comprising a main body (10), a front sleeve (20), and a rear end cover (30). The front sleeve (20) and the rear end cover (30) are respectively assembled at the front end and the rear end of the main body (10). An inner core (50) made of a material different from that of the main body (10) is arranged in the main body (10). The inner core (50) is connected to the main body (10) by means of a plurality of ribs (51) arranged on the outer side of the inner core (50). A vibration suppression member (53) is arranged between the ribs on the middle rear section of the inner core (50) and the outer side surface of the inner core (50). The inner side wall surface of the inner core (50) is provided with a plurality of protruding bumps (54). A middle tube (40) of the badminton racket is passed through the front sleeve (20) and then inserted between the plurality of bumps (54) of the inner core (50). The bumps (54) can increase the tightness of connection between the inner core (50) and the middle tube (40) and reduce the vibration transmitted to the main body (10) when the middle tube (40) is stressed. The inner core (50) made of the different material can also increase the structural strength of the inner core (50). In addition, the vibration suppression member (53) can absorb the external force from the middle tube (40) when hitting a shuttlecock, so as to suppress and reduce the vibration transmitted to the main body (10). In this way, the rotation of the racket face can be better controlled while the force of swinging the racket is fully released.

Description

Vibration-damping grip structure of badminton racket

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on September 14, 2023, with application number 2023111847896 and invention name “Vibration-damping grip structure for badminton racket”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the structure of a badminton racket, and in particular to a vibration-damping grip structure of a badminton racket. Background Art

[0003] A badminton racket's structure consists of three main parts: the head frame, the center tube, and the grip. The head frame is threaded to form the hitting surface, and the head frame connects to the grip through the center tube. Traditional badminton racket grips are typically made of strong, resistant wood. In addition to its availability, ease of processing, and affordability, wood also offers excellent damping properties, helping to absorb vibrations generated by the racket hitting the ball.

[0004] To reduce vibrations generated when hitting a ball, besides using wood for badminton racket grips, another approach is to wrap a grip cloth around the outside of the racket grip. This cloth absorbs vibrations through its inherent elasticity. Other uses include adjusting the grip thickness, even slightly changing the racket's balance point, increasing grip comfort, absorbing sweat, and providing a non-slip feel. Common grip cloths can be broadly categorized into two types based on the material used: PU (polyurethane) and towel-like. Traditional grip cloths are wrapped around the outside of the grip after the entire racket is manufactured, often after the entire racket is finished. This provides a poorly secured grip. Over time, due to sweat and other external factors, the grip cloth can become loose, develop odors, or wear out. Even wooden grips can deteriorate or become damaged due to perspiration. Furthermore, replacing these grip cloths is time-consuming and inconvenient.

[0005] A badminton racket is proposed in an approved Taiwan invention patent (certificate number I772198), which includes a racket frame, a grip, a front sleeve and a middle tube. The grip includes a grip portion, a sleeve portion, a fixing member, a plurality of support members and an adjustment ring. The grip portion has a front end. The sleeve portion is connected to the front end of the grip portion. The sleeve portion has a first top surface and a first opening, and the first opening is located on the first top surface. The fixing member is connected to the first top surface and extends from the first opening to the inside of the grip portion. The support members are arranged in the grip. The support members respectively have a front edge and a recess. The front edge is connected to an inner side wall of the sleeve portion, and the recess is located on the front edge. The adjustment ring is arranged in the recesses of the support members. The front sleeve is mounted on the sleeve portion of the grip. One end of the middle tube is connected to the racket frame, and the other end passes through the first opening to be inserted into the fixing member.

[0006] However, the middle tube of the above-mentioned invention patent is inserted into the sleeve portion; multiple support members are arranged on the handle portion, and the front edges of the support members are connected to an inner wall of the sleeve portion. When the incoming badminton directly hits the racket face, the impact force is transmitted through the middle tube. Although the multiple support members can disperse the impact force, they cannot achieve the effect of shock absorption or absorption. The vibration will cause discomfort to the palm and arm.

[0007] On the other hand, the sleeve, multiple support parts and the handle are made of the same plastic material. If the material is relatively hard, such as carbon fiber, the overall racket is too hard and the elastic coefficient is insufficient. In addition to the poor grip of the handle, the resonance or vibration will cause discomfort, and the racket is also prone to breakage and poor durability. If the material is relatively soft, such as nylon plastic, the entire racket is insufficiently rigid, the force of hitting the ball cannot be effectively released, and the insufficient structural strength makes it difficult to control the rotation direction of the racket face, thereby affecting the performance of returning the ball.

[0008] Summary of the Invention

[0009] The technical problem to be solved by this application is to provide a vibration-damping grip structure for a badminton racket, which can absorb the external force from the middle shaft when hitting the ball, thereby suppressing and reducing vibration and providing better control of the rotation direction of the racket face angle.

[0010] A preferred embodiment of the vibration-damping grip structure for a badminton racket of the present application comprises: a main body, a front sleeve mounted at the front end of the main body, and a rear end cap mounted at the rear end of the main body. The front sleeve is hollow and has a through hole for a middle tube of the badminton racket to pass through. The main body is a hollow tubular body having an octagonal cross-section. An inner core is centrally disposed within the main body. The inner core is an axially extending tubular member. The middle tube is inserted into and fixed within the inner core. The outer side of the inner core has a plurality of ribs protruding outward in radial directions. The distal ends of the ribs are connected to the inner sidewall of the main body. A gap is formed between the outer side surface of the middle and rear section of the inner core and the ribs. A vibration damper is disposed in the gap. The inner sidewall of the inner core has a plurality of protruding joints extending toward the center. The joints extend in a direction parallel to the axial direction of the inner core and are configured to clamp the middle tube. The vibration damper is made of an elastic material. The main body and the ribs are manufactured using injection molding technology.

[0011] Preferably, the cross-section of the main body is a non-regular octagon, and the center of the cross-section of the main body is defined as the coordinate origin O of the rectangular coordinate system. The cross-section of the main body is symmetrical with respect to the shapes below the X-axis and above the X-axis, and the cross-section of the main body is symmetrical with respect to the shapes to the right of the Y-axis and to the left of the Y-axis. The octagon is arranged in a counterclockwise direction from the positive X-axis, including the 1st to 8th sides and the 1st to 8th corners. The connection between the 1st and 2nd sides is the 1st corner, and the positions of the remaining corners are Similarly, the first and fifth sides are perpendicular to the X-axis, the third and seventh sides are perpendicular to the Y-axis, and the angle between the connection between the second corner point and the coordinate origin O and the positive Y-axis is 32.5°; the ribs include: a first rib, a second rib, a third rib and a fourth rib, the end of the first rib is connected to the position of the second corner point, the end of the second rib is connected to the position of the third corner point, the end of the third rib is connected to the position of the sixth corner point, and the end of the fourth rib is connected to the position of the seventh corner point.

[0012] Preferably, an inner wall surface of the main body is formed with an embedding groove at the position of the second, third, sixth and seventh corner points, and the ends of the first to fourth ribs can be respectively embedded in the embedding grooves.

[0013] Preferably, the end surfaces of the combined bodies in contact with the middle tube are arc surfaces or circular arc surfaces.

[0014] Preferably, the material of the main body includes: any one of nano nylon 6 (PA6) and a composite material consisting of nano nylon 6 (PA6) and 10% glass fiber (GF); the material of the inner core is carbon fiber.

[0015] Preferably, the material of the ribs includes any one of carbon fiber and a composite material consisting of nano-nylon (PA) and 10% glass fiber (GF).

[0016] Preferably, the material of the vibration damper includes any one of silicone, thermoplastic polyurethane (TPU), and thermoplastic rubber (TPR).

[0017] Preferably, the length of the middle and rear section is 1 / 3 of the total length of the inner core.

[0018] Preferably, the combination extends in the middle front section of the inner core along the axial direction parallel to the inner core, and the length of the middle front section is 1 / 3 of the total length of the inner core.

[0019] The advantages and functions of the vibration-damping grip structure of the badminton racket of the present application are: it can absorb the external force from the middle shaft when hitting the ball, thereby suppressing and reducing vibration; the main body and inner core of the grip are made of different materials, and the components of different materials provide excellent structural strength, which can meet the complete release of force and better control of the rotation direction of the racket face angle when swinging. It can replace traditional wooden grips and improve the shortcomings of the aforementioned previous technologies, and can be quickly produced and formed.

[0020] The details of other functions and embodiments of the present application are described below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] FIG1 is a diagram showing the appearance and structure of an embodiment of the present application;

[0023] FIG2 is an exploded view of the embodiment of FIG1 ;

[0024] FIG3 is a structural cross-sectional view of FIG1 at position AA;

[0025] FIG4 is a structural cross-sectional view of FIG2 at position BB;

[0026] FIG5 is a radial cross-sectional view of an embodiment of the structure of the inner core;

[0027] FIG6 is an axial cross-sectional view of an embodiment of the structure of the inner core;

[0028] FIG. 7 is an exploded view of the structure of another embodiment of the badminton racket grip of the present application.

[0029] Explanation of Reference Symbols: 10 Main body 11 Front end 12 Fitting groove 121 Protrusion 20 Front sleeve 21 Through hole 22 Tightening bolt 30 Rear end cover 40 Middle tube 50 Inner core 51 Rib 52 Slit 53 Vibration damper 54 Combined body L1 Middle rear section L2 Middle front section P1 1st corner point P2 2nd corner point P3 3rd corner point P4 4th corner point P5 5th corner point P6 6th corner point P7 7th corner point P8 8th corner point S1 1st side S2 2nd side S3 3rd side S4 4th side S5 5th side S6 6th side S7 7th side S8 8th side DETAILED DESCRIPTION

[0030] The positional relationships described in the following embodiments include up, down, left, and right. Unless otherwise specified, they are based on the directions of the components shown in the drawings.

[0031] 1 and 2 , which are the exterior and exploded views of a preferred embodiment of the present invention, show a vibration-damping badminton racket grip structure comprising a main body 10 , a front sleeve 20 , and a rear end cap 30 .

[0032] The front sleeve 20 and rear end cap 30 are preferably manufactured using injection molding technology. The front sleeve 20 and rear end cap 30 are made of either nano-nylon (PA) or engineering resin (ABS). The front sleeve 20 is mounted on the front end 11 of the main body 10, and the rear end cap 30 is mounted on the rear end of the main body 10. The front end 11 of the main body 10 is tapered, and the front sleeve 20 is also tapered to fit over the front end 11 of the main body 10. The front sleeve 20 is hollow and has a through hole 21 for the middle tube 40 of the badminton racket to pass through. A locking bolt 22 is also provided that passes through the front sleeve 20 and the front end 11 of the main body 10. The locking bolt 22 is used to lock the middle tube 40, preventing the front sleeve 20 and the middle tube 40 from separating from the main body 10.

[0033] The main body 10 is a hollow tubular body. An inner core 50 is disposed in the center of the main body 10. The inner core 50 is an axially extending tubular member. The middle tube 40 of the badminton racket is inserted into the inner core 50 after passing through the front sleeve 20 and fixed therein. The outer side of the inner core 50 has a plurality of ribs 51 extending outward in radial directions. The ends of the ribs 51 are connected to the inner wall surface of the main body 10 (see FIG. 3 ). A gap 52 is formed between the ribs 51 (see FIG6 ). Preferably, the length of the middle and rear sections L1 is 1 / 3 of the total length of the inner core 50. A vibration damper 53 is disposed in the gap 52. Preferably, the vibration damper 53 surrounds the outer surface of the middle and rear sections L1 of the inner core 50. The vibration damper 53 is used to absorb the external force from the middle tube 40 when hitting the ball, thereby suppressing and reducing the vibration transmitted to the main body 10. In a preferred embodiment, the material of the inner core 50 is carbon fiber. The inner core 50, which is made of a different material from the main body 10, can increase its structural strength and better withstand external forces and impacts from the middle tube 40. The vibration damper 53 is made of any one of silicone, thermoplastic polyurethane (TPU), and thermoplastic rubber (TPR). The ribs 51 are made of any one of carbon fiber and a composite material consisting of nano-nylon (PA) and 10% glass fiber (GF) (PA + 10% GF).

[0034] Referring to FIG. 2 , in a preferred embodiment, the main body 10 and the vibration damper 53 are manufactured using injection molding. The main body 10 is first formed using injection molding, then transferred to another mold. A soft adhesive is then injected into the default position of the vibration damper 53 using injection molding. The vibration damper 53 is formed of the vibration-absorbing soft adhesive and coated around the outside of the middle and rear section L1 of the inner core 50. The main body 10 is made of either nano-nylon 6 (Polyamide 6, PA6) or a composite material (PA6 + 10% GF) consisting of nano-nylon 6 (PA6) and 10% glass fiber (GF).

[0035] Please refer to Figure 7. In another preferred embodiment, the main body 10 and the ribs 51 are made by injection molding technology, and the vibrator 53 is pre-made into a circular tube and then mounted on the default position of the vibrator 53; preferably, the circular tubular vibrator 53 is fixed to the outer side of the middle and rear section L1 of the inner core 50 and the gap 52 by gluing.

[0036] Please refer to Figures 3 and 4. The cross-sectional shape of the main body 10 is a polygon, preferably an octagon, so that the user can have a variety of gripping methods and hitting angles when holding the grip. In a preferred embodiment, the cross-sectional shape of the main body 10 is a non-regular octagon. From the cross-sectional view (radial cross-section) of the main body 10, referring to the definition of the rectangular coordinate system, the center of the cross-sectional view of the main body 10 is the coordinate origin O of the rectangular coordinate system, the shapes below the X axis and above the X axis are symmetrical to each other, and the shapes to the right of the Y axis and to the left of the Y axis are symmetrical to each other. Symmetrical, the octagon includes, starting from the positive X-axis and arranged counterclockwise, the 1st side S1 to the 8th side S8, the 1st corner point P1 to the 8th corner point P8. The connection between the 1st side S1 and the 2nd side S2 is the 1st corner point P1, and the positions of the remaining corner points (2nd corner point P2 to 8th corner point P8) are similar. Among them, the 1st side S1 and the 5th side S5 are perpendicular to the X-axis, the 3rd side S3 and the 7th side S7 are perpendicular to the Y-axis, and the angle between the connection between the 2nd corner point P2 and the coordinate origin O and the positive Y-axis is 32.5° (see Figure 4).

[0037] In a preferred embodiment, the outer side of the inner core 50 has a total of four ribs 51, namely the first rib to the fourth rib, the end of the first rib is connected to the position of the second corner point P2, the end of the second rib is connected to the position of the third corner point P3, the end of the third rib is connected to the position of the sixth corner point P6, and the end of the fourth rib is connected to the position of the seventh corner point P7. In a preferred embodiment, the inner wall surface of the main body 10 is formed with an engaging groove 12 at the position of the second, third, sixth, and seventh corner points (see Figure 4). The first rib to the fourth rib are connected to the second corner point P2, the end of the second rib is connected to the position of the third corner point P3, the end of the third rib is connected to the position of the sixth corner point P6, and the end of the fourth rib is connected to the position of the seventh corner point P7. The ends of the fourth ribs can be respectively embedded in the embedding grooves 12. One embodiment of the embedding grooves 12 is defined by two protrusions 121 protruding from the inner wall of the main body 10. Preferably, the protrusions 121 extend along the axial direction parallel to the main body. The inner core 50 is inserted into the main body 10 along the axial direction of the main body 10, and after the ends of the first to fourth ribs are respectively embedded in the embedding grooves 12, the ends of the four ribs 51 are respectively connected to the main body 10 using ultrasonic fusion technology.

[0038] Please refer to Figure 5. In a preferred embodiment, the inner wall of the inner core 50 has a plurality of coupling bodies 54 protruding toward the center. In a preferred embodiment, there are 6 coupling bodies 54, which are evenly distributed at equally divided circumferential positions on the inner wall of the inner core 50. The coupling bodies 54 extend along the axial direction parallel to the inner core 50. In a preferred embodiment, the coupling bodies 54 extend along the axial direction parallel to the inner core 50 in the middle front section L2 of the inner core 50. Preferably, the middle front section L2 is 1 / 3 of the total length of the inner core 50 (see Figure 6). The coupling bodies 54 are used to clamp the middle tube 40. Preferably, the end surface of the coupling body 54 in contact with the middle tube 40 is an arc surface or a circular arc surface. The function of the coupling body 54 is to increase the combination fit with the middle tube 40 and reduce the vibration transmitted to the main body 10 when the middle tube 40 is subjected to force.

[0039] The embodiments and / or implementation methods described above are only used to illustrate the preferred embodiments and / or implementation methods for realizing the technology of the present application, and do not impose any form of limitation on the implementation methods of the technology of the present application. Any person skilled in the art may make slight changes or modifications to other equivalent embodiments without departing from the scope of the technical means disclosed in the content of the present application, but they should still be regarded as technologies or embodiments that are essentially the same as those of the present application.

Claims

1. A vibration-reducing grip structure for a badminton racket, comprising: A main body, a front sleeve mounted on the front end of the main body, and a rear end cover mounted on the rear end of the main body, wherein the interior of the front sleeve is hollow and has a through hole for a middle tube of a badminton racket to pass through; characterized in that: The main body is a hollow tubular body with an octagonal cross-sectional shape. An inner core is arranged at the center of the interior of the main body. The inner core is an axially penetrating tubular component. The middle tube is inserted into the inner core and fixed therein. The outer side of the inner core has a plurality of ribs protruding outward along a radial direction. The ends of the ribs in the extension direction are connected to the inner wall of the main body. A gap is formed between the outer surface of the middle and rear section of the inner core and the ribs. A vibration damper is arranged in the gap. The inner wall of the inner core has a plurality of combinations protruding toward the center. The combinations extend along an axial direction parallel to the inner core. The combinations are used to clamp the middle tube. The vibration damper is made of elastic material, and the main body and the ribs are made by injection molding technology.

2. The vibration-damping handle structure of a badminton racket according to claim 1, characterized in that: The cross-section of the main body is a non-regular octagon, with the center of the cross-section of the main body defined as the origin O of the rectangular coordinate system. The cross-sections of the main body below the X-axis and above the X-axis are symmetrical to each other, and the cross-sections of the main body to the right of the Y-axis and to the left of the Y-axis are symmetrical to each other. The octagon is arranged in sequence from the positive X-axis in a counterclockwise direction, including the 1st to 8th sides and the 1st to 8th corners. The connection between the 1st side S1 and the 2nd side S2 is the 1st corner, and the positions of the remaining corners are similar. The first side and the fifth side are perpendicular to the X-axis, the third side and the seventh side are perpendicular to the Y-axis, and the angle between the connection between the second corner point and the coordinate origin O and the positive Y-axis is 32.5°; the ribs include: a first rib, a second rib, a third rib and a fourth rib, the end of the first rib is connected to the position of the second corner point, the end of the second rib is connected to the position of the third corner point, the end of the third rib is connected to the position of the sixth corner point, and the end of the fourth rib is connected to the position of the seventh corner point.

3. The vibration-damping handle structure of a badminton racket according to claim 2, characterized in that: The inner wall surface of the main body is formed with an embedding groove at the positions of the second, third, sixth and seventh corner points, and the ends of the first rib to the fourth rib can be respectively embedded in the embedding grooves.

4. The vibration-damping handle structure of a badminton racket according to claim 1, characterized in that: The end surfaces of the combined bodies contacting the middle tube are arc surfaces or circular arc surfaces.

5. The vibration-damping handle structure of a badminton racket according to claim 1, characterized in that: The material of the main body includes: any one of nano nylon 6 and a composite material consisting of nano nylon 6 and 10% glass fiber added thereto; the material of the inner core is carbon fiber.

6. The vibration-damping handle structure of a badminton racket according to claim 5, characterized in that: The material of the ribs includes: any one of carbon fiber and a composite material consisting of nano-nylon and 10% glass fiber.

7. The vibration-damping handle structure of a badminton racket according to claim 1, characterized in that: The material of the vibration damper includes any one of silicone, thermoplastic polyurethane, and thermoplastic rubber.

8. The vibration-damping handle structure of a badminton racket according to claim 1, characterized in that: The length of the middle and rear section is 1 / 3 of the total length of the inner core.

9. The vibration-damping handle structure of a badminton racket according to claim 1, characterized in that: The combination extends in the middle front section of the inner core in a direction parallel to the axial direction of the inner core, and the length of the middle front section is 1 / 3 of the total length of the inner core.

Images