Vibration-damping grip structure for badminton rackets

Abstract

To provide a vibration attenuation grip structure of a badminton racket.SOLUTION: A vibration attenuation grip structure of a badminton racket includes a body part, and a cap and an end cap respectively assembled in front and rear ends of the body part. An inner core having a different material is arranged in the inside of the body part. The inner core is connected to the body part by a plurality of rib parts provided in the outside of the inner core. A vibration attenuator is arranged between the rib parts in middle rear portions of the inner core and an outer surface of the inner core. A plurality of projecting coupling bodies are provided in an inside wall surface of the inner core. A shaft is allowed to pass the cap and inserted to a part between the inner core and the coupling body. The coupling body improves coupling adhesion with the shaft, and vibration transmitted to the body part when the shaft receives a force can be reduced. While the inner core having a different material can improve the structure strength, an external force from the shaft at the time of hitting a ball can be absorbed by the vibration attenuator and further, vibration transmitted to the body part can be suppressed and reduced, so that complete release of a force at the time of hitting a ball and excellent rotation direction control of an angle between a racket surface and the ground can be achieved.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a badminton racket structure, and more particularly to a vibration-damping grip structure for a badminton racket. [Background technology]

[0002] The structural composition of a badminton racket includes three parts: a frame, a shaft, and a grip. A striking surface is formed by threading strings through the frame, and the frame is connected to the grip by the shaft. Conventional badminton racket grips are generally made of wood, which is stronger and less likely to break, and wood is selected to manufacture badminton racket grips. This consideration is due to the fact that wood is easy to obtain, easy to process, and inexpensive, and also because wood has good vibration-damping properties, which help absorb the vibrations generated when hitting the ball with the racket.

[0003] In order to reduce the vibrations that occur when hitting the ball with the racket, in addition to selecting wood to manufacture the badminton racket grip, another method is to wrap a wrapping cloth around the outside of the badminton racket grip, which can absorb vibrations due to the elasticity of the material itself, and other functions of the wrapping cloth include adjusting the thickness of the badminton racket grip, thereby slightly changing the balance point of the badminton racket to improve comfort when holding it, absorbing sweat, and providing anti-slip properties. Depending on the materials used, common wrapping cloths can basically be divided into PU material wrapping cloths and towel wrapping cloths. Conventional wrapping cloths are wrapped around the outside of the grip after the manufacture of the grip, especially after the manufacture of the entire badminton racket, and cannot be securely attached to the grip. After a certain period of use, problems arise in that the wrapping cloth becomes loose and falls off due to sweat or other external factors, gives off an unpleasant odor, or becomes worn. Even grips made of wood can deteriorate or be damaged by sweat penetration. Furthermore, replacing the wrapping cloth requires more time, making it inconvenient to use.

[0004] The granted Taiwan invention patent (Certificate No. I772198) proposes a badminton racket comprising a frame, a grip, a cap, and a shaft. The grip comprises a handle, a sleeve, a fixing member, a plurality of support members, and an adjustment ring. The handle has a tip. The sleeve is connected to the tip of the handle. The sleeve has a first top surface and a first opening, the first opening being located on the first top surface. The fixing member is connected to the first top surface and extends from the first opening into the handle. These support members are installed within the grip. Each of these support members has a front edge and a recess. The front edge is connected to the inner wall of the sleeve, and the recess is located on the front edge. The adjustment ring is installed within the recess of the support members. A cap is sleeved within the sleeve of the grip. One end of the shaft is connected to the frame, and the other end is inserted into the fixing member through the first opening.

[0005] However, in the above-mentioned invention patent, the shaft is inserted into a sleeve, and multiple support members are installed on the grip, with the front edges of the support members connected to the inner wall of the sleeve. When the shuttlecock collides directly with the strings and the impact force is transmitted through the shaft, the multiple support members can disperse the impact force, but cannot achieve the effect of vibration damping or absorption, and the vibration causes discomfort to the palm and arm.

[0006] On the other hand, if the socket, the support members, and the grip are all made of the same plastic material, and a harder material such as carbon fiber is used, the racket as a whole will be too hard and have an insufficient elastic modulus, making the grip uncomfortable to hold and causing discomfort due to resonance or vibration. In addition, the racket will be prone to breakage and have low durability. On the other hand, if a softer material such as nylon plastic is used, the racket as a whole will not be rigid enough to effectively release the force of impact, and the structural strength will be insufficient, resulting in insufficient control of the rotational direction of the angle between the racket face and the ground, which will further affect counterattack behavior. Summary of the Invention [Problem to be solved by the invention]

[0007] The object of the present invention is to provide a vibration-damping grip structure for a badminton racket, which can absorb the external force from the shaft when hitting the ball, and further suppress and reduce vibration, thereby providing better control of the rotation direction of the angle between the racket face and the ground. [Means for solving the problem]

[0008] a first end cap attached to the end of the body; a second end cap attached to the end of the body; a hollow body having a through-hole for receiving the shaft of a badminton racket; a hollow tubular body having an octagonal cross section; an inner core disposed in the center of the body; a tubular member extending axially through the inner core; the shaft inserted into and fixed to the inner core; a plurality of ribs protruding radially from the outside of the inner core; the ends of these ribs connected to the inner wall surface of the body; slits formed between the outer surface of the central rear portion of the inner core and the ribs; a vibration damper disposed in the slit; a plurality of connecting bodies protruding toward the center from the inner wall surface of the inner core; the connecting bodies extending in a direction parallel to the axial direction of the inner core; the vibration damper being made of an elastic material; and the body and these ribs being manufactured by injection molding.

[0009] 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 origin O of a Cartesian coordinate system. The shapes of the cross section of the main body below the X axis and above the X axis are symmetrical to each other, and the shapes of the cross section 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, when arranged counterclockwise from the positive X axis, includes first to eighth sides and first to eighth corners, the first corner being the junction of the first side and the second side, and the positions of the remaining corners are By analogy, the first and fifth sides are perpendicular to the X-axis, the third and seventh sides are perpendicular to the Y-axis, the angle formed by the connecting line between the second corner point and the coordinate origin O and the positive Y-axis is 32.5°, and these rib portions include a first rib portion, a second rib portion, a third rib portion and a fourth rib portion, and the end of the first rib portion is connected to the position of the second corner point, the end of the second rib portion is connected to the position of the third corner point, the end of the third rib portion is connected to the position of the sixth corner point, and the end of the fourth rib portion is connected to the position of the seventh corner point.

[0010] Preferably, fitting grooves are formed at the positions of the second, third, sixth and seventh corner points on the inner wall surface of the main body, and the ends of the first to fourth rib portions can be fitted exactly into these fitting grooves, respectively.

[0011] Preferably, the end surfaces of these coupling bodies that come into contact with the shaft are arched or arcuate surfaces.

[0012] Preferably, the material of the main body includes one of nano nylon 6 (PA6) and a composite material made of nano nylon 6 (PA6) with 10% glass fiber (GF), and the material of the inner core is carbon fiber.

[0013] Preferably, the material of these ribs includes any one of carbon fiber and a composite material made of nano-nylon (PA) with 10% glass fiber (GF).

[0014] Preferably, the material of the vibration damper includes any one of silica gel, thermoplastic polyurethane (TPU), and thermoplastic rubber (TPR).

[0015] Preferably, the length of the central rear portion is 1 / 3 of the total length of the inner core.

[0016] Preferably, the connector extends in a direction parallel to the axial direction of the inner core at a center front portion of the inner core, and the length of the center front portion is 1 / 3 of the total length of the inner core. [Effects of the Invention]

[0017] The advantages and effects of the vibration-damping badminton racket grip structure of the present invention are that it can absorb the external force from the shaft when hitting the ball, further suppressing and reducing vibration; the main body and inner core of the grip are made of different materials, which provides excellent structural strength by using different materials, enables complete release of force when hitting the ball, and enables optimal control of the rotational direction of the angle between the racket face and the ground; it can replace traditional wooden grips and improve on the deficiencies of the prior art mentioned above, and can be produced and molded quickly.

[0018] Specific embodiments of the present invention and their technical features and effects will be described below with reference to the drawings. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is an external structural view of an embodiment of the present invention. [Figure 2] FIG. 2 is an exploded view of the structure of the embodiment of FIG. [Figure 3] FIG. 3 is a structural cross-sectional view taken along the line AA in FIG. [Figure 4] FIG. 4 is a structural cross-sectional view taken along the line BB in FIG. [Figure 5] FIG. 5 is a radial cross-sectional view of the structure of one embodiment of the inner core. [Figure 6] FIG. 6 is an axial cross-sectional view of the structure of one embodiment of the inner core. [Figure 7] FIG. 7 is an exploded view of the structure of another embodiment of the badminton racket grip according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0020] Directions (e.g., up, down, left, right, front, and back) referred to in the embodiments disclosed in the specification and drawings of the present invention patent are based on the contents shown in the drawings and are intended to describe the relative relationships (e.g., positional relationships, connection relationships, and operational relationships) between each element or structure of the embodiments.

[0021] 1 and 2 are an external view and an exploded view of a preferred embodiment of the present invention. The vibration-damping grip structure for a badminton racket according to the present invention comprises a main body 10, a cap 20, and an end cap 30.

[0022] In a preferred embodiment, the cap 20 and the end cap 30 are manufactured by injection molding, and the cap 20 and the end cap 30 are made of either nano nylon (PA) or engineering resin (ABS). The cap 20 is assembled to the tip 11 of the main body 10, and the end cap 30 is assembled to the end of the main body 10. The tip 11 of the main body 10 has a tapered shape, and the cap 20 may also have a tapered shape to fit and be fitted onto the tip 11 of the main body 10. The inside of the cap 20 is hollow and has a through-hole 21 through which the shaft 40 of the badminton racket passes. A tightening bolt 22 is separately installed and can pass through the cap 20 and the tip 11 of the main body 10. The tightening bolt 22 locks the shaft 40 to prevent the cap 20 and the shaft 40 from separating from the main body 10.

[0023] The main body 10 is a hollow tubular body, and an inner core 50 is disposed at the center of the interior of the main body 10. The inner core 50 is a tubular member that penetrates in the axial direction. The shaft 40 of the badminton racket is inserted into the inner core 50 through the cap 20 and fixed therein. The outer side of the inner core 50 has a plurality of ribs 51 that extend outward in the radial direction. The ends of these ribs 51 in the extending direction are connected to the inner wall surface of the main body 10 (see FIG. 3). The outer surface of the central rear portion L1 of the inner core 50 and the ribs A slit 52 is formed between the center-rear portion L1 and the center-rear portion 51 (see FIG. 6 ). Preferably, the length of the center-rear portion L1 is 1 / 3 of the overall length of the inner core 50. A vibration damper 53 is disposed in the slit 52. Preferably, the vibration damper 53 is wrapped around the outer surface of the center-rear portion L1 of the inner core 50. The vibration damper 53 absorbs the external force from the shaft 40 when hitting the ball, and further suppresses and reduces the vibration transmitted to the main body 10. In a preferred embodiment, the material 50 of the inner core is carbon fiber (Carbon The main body 10 is made of a material selected from the group consisting of carbon fiber, nano-nylon (PA), and composite materials (PA+10% GF) which are made of 10% glass fiber (GF). The main body 10 has improved structural strength compared to the inner core 50 which is made of a different material, and can efficiently withstand external forces and impact forces from the shaft 40. The material of the vibration damper 53 includes any one of silica gel, thermoplastic polyurethane (TPU), and thermoplastic rubber (TPR).

[0024] Referring to FIG. 2, in a preferred embodiment, the main body 10 and the vibration damper 53 are manufactured using a coating injection molding technique. First, the main body 10 is manufactured using an injection molding technique, and then the main body 10 is moved into another mold. At the same time, a soft plastic is injected into the default position of the vibration damper 53 using a coating injection molding technique. The vibration damper 53 is formed using a soft plastic with a vibration-absorbing effect and covers the outside of the middle-rear portion L1 of the core 50. The material of the main body 10 includes any one of nano nylon 6 (PA6, Polyamide 6) and a composite material (PA6+10%GF) made of nano nylon 6 (PA6) and 10% glass fiber (GF).

[0025] Referring to Figure 7, in another preferred embodiment, the main body 10 and these rib portions 51 are manufactured by injection molding technology, and the vibration damper 53 is manufactured in advance in a cylindrical shape and then installed to cover the default position of the vibration damper 53, and preferably, the cylindrical vibration damper 53 is further fixed to the outside of the middle and rear portion L1 of the inner core 50 and the slit 52 by adhesive means.

[0026] 3 and 4, the cross-sectional shape of the main body 10 is polygonal, preferably octagonal, so that various gripping methods and hitting angles are possible when a user grips the grip. In a preferred embodiment, the cross-sectional shape of the main body 10 is a non-regular octagon. When viewed from the cross-section (radial cross-section) of the main body 10, referring to the definition of a Cartesian coordinate system, the center of the cross-section of the main body 10 is the coordinate origin O of the Cartesian 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 The octagons are symmetrical to each other. When arranged counterclockwise from the positive X-axis, they include the first side S1 to the eighth side S8 and the first corner point P1 to the eighth corner point P8. The junction of the first side S1 and the second side S2 is the first corner point P1, and the positions of the remaining corner points (the second corner point P2 to the eighth corner point P8) can be inferred from this. The first side S1 and the fifth side S5 are perpendicular to the X-axis, the third side S3 and the seventh side S7 are perpendicular to the Y-axis, and the angle formed by the connection line between the second corner point P2 and the coordinate origin O and the positive Y-axis is 32.5° (see Figure 4).

[0027] In a preferred embodiment, there are a total of four rib portions 51 on the outside of the inner core 50, which are the first rib portion to the fourth rib portion, respectively. The end of the first rib portion is connected to the position of the second corner point P2, the end of the second rib portion is connected to the position of the third corner point P3, the end of the third rib portion is connected to the position of the sixth corner point P6, and the end of the fourth rib portion is connected to the position of the seventh corner point P7. In a preferred embodiment, fitting grooves 12 are formed at the positions of the second, third, sixth, and seventh corner points on the inner wall surface of the main body 10 (see FIG. 4), and the first to fourth rib portions The ends of the first rib portion to the fourth rib portion can be fitted into these fitting grooves 12, and one embodiment of the fitting groove 12 is defined by two protrusions 121 protruding from the inner wall surface of the main body portion 10, and preferably the protrusions 121 extend along a direction parallel to the axial direction of the main body portion. After the inner core 50 is inserted into the main body portion 10 along the axial direction of the main body portion 10 and the ends of the first rib portion to the fourth rib portion are fitted into these fitting grooves 12, respectively, the ends of the four rib portions 51 are connected to the main body portion 10 by ultrasonic welding technology.

[0028] Referring to Figure 5, in a preferred embodiment, the inner wall surface of the inner core 50 has a plurality of connecting bodies 54 protruding toward the center, and in a preferred embodiment, there are a total of six connecting bodies 54, which are evenly arranged at equal circumferential positions on the inner wall surface of the inner core 50, and the connecting bodies 54 extend along a direction parallel to the axial direction of the inner core 50, and in a preferred embodiment, the connecting bodies 54 extend along a direction parallel to the axial direction of the inner core 50 in the center front portion L2 of the inner core 50, and preferably, the length of the center front portion L2 is 1 / 3 of the total length of the inner core 50 (see Figure 6), and the connecting bodies 54 are for clamping the shaft 40, and preferably, the end surface of the connecting bodies 54 that contact the shaft 40 is an arched or arcuate surface, and the role of the connecting bodies 54 is to improve the adhesion of the connecting bodies to the shaft 40 and to reduce vibration transmitted to the main body 10 when the shaft 40 is subjected to force. [Explanation of symbols]

[0029] 10 Main body 11 Tip 12 Fitting groove 121 Protrusion 20 Caps 21 Through hole 22 Fastening bolt 30 End Cap 40 shaft 50 inner core 51 Rib section 52 Slit 53 Vibration damper 54 Conjugate L1 mid-posterior part L2 middle front part P1 First 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 First side S2 Second side S3 Third side S4 Fourth side S5 5th side S6 Side 6 S7 Side 7 S8 8th side

Claims

1. A vibration-damping grip structure for a badminton racket, comprising: a main body, a cap assembled to a tip of the main body, and an end cap assembled to an end of the main body, the cap being hollow and having a through-hole through which a shaft of the badminton racket passes; a shaft inserted into and fixed to the inner core; a plurality of ribs protruding radially from the outside of the inner core, the ends of which are connected to the inner wall surface of the body; a slit formed between the outer surface of the central rear portion of the inner core and the ribs; a vibration damper disposed in the slit; a plurality of connecting bodies protruding toward the center from the inner wall surface of the inner core; the connecting bodies extending in a direction parallel to the axial direction of the inner core and intended to sandwich the shaft; the vibration damper made of an elastic material; and the body and the ribs manufactured by injection molding.

2. 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 origin O of a Cartesian coordinate system. The shapes of the cross section of the main body below the X axis and above the X axis are symmetrical to each other, and the shapes of the cross section of the main body to the right of the Y axis and to the left of the Y axis are symmetrical to each other. When arranged counterclockwise from the positive X axis, the octagon includes first to eighth sides and first to eighth corners, and the junction of the first side S1 and the second side S2 is the first corner. The positions of the remaining corners can be inferred from this, and the junction of the first side S1 and the fifth side S2 is the first corner.

2. The vibration-damping grip structure for a badminton racket according to claim 1, wherein the first side is perpendicular to the X-axis, the third side and the seventh side are perpendicular to the Y-axis, the angle formed by the connecting line between the second corner point and the coordinate origin O and the positive Y-axis is 32.5°, the ribs include a first rib portion, a second rib portion, a third rib portion and a fourth rib portion, an end of the first rib portion is connected to the second corner point, an end of the second rib portion is connected to the third corner point, an end of the third rib portion is connected to the sixth corner point, and an end of the fourth rib portion is connected to the seventh corner point.

3. 3. The vibration-damping grip structure for a badminton racket according to claim 2, wherein fitting grooves are formed at the positions of the second, third, sixth and seventh corner points on the inner wall surface of the main body, and the ends of the first through fourth rib portions can be fitted into these fitting grooves, respectively.

4. 2. The vibration-damping grip structure for a badminton racket according to claim 1, wherein the end surface of said combined body that comes into contact with said shaft is an arched or arcuate surface.

5. 2. The vibration-damping grip structure for a badminton racket as described in claim 1, wherein the material of the main body includes one of nano nylon 6 (PA6) and a composite material made of nano nylon 6 (PA6) with 10% glass fiber (GF), and the material of the inner core is carbon fiber.

6. 6. The vibration damping grip structure for a badminton racket according to claim 5, wherein the material of the ribs includes one of carbon fiber and a composite material made of nano-nylon (PA) with 10% glass fiber (GF).

7. 2. The vibration-damping grip structure for a badminton racket according to claim 1, wherein the material of the vibration-damping body includes any one of silica gel, thermoplastic polyurethane (TPU), and thermoplastic rubber (TPR).

8. 2. The vibration-damping grip structure for a badminton racket according to claim 1, wherein the length of the central rear portion is 1 / 3 of the total length of the inner core.

9. 2. The vibration-damping grip structure for a badminton racket according to claim 1, wherein the connecting body extends in a direction parallel to the axial direction of the inner core in the center front portion of the inner core, and the length of the center front portion is 1 / 3 of the total length of the inner core.

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