Telescoping lock sleeve for a golf club

Abstract

This invention discloses a telescopic locking sleeve for golf clubs, comprising a first sleeve, a second sleeve, a clubhead sleeve, a grip fixing sleeve, and a telescopic assembly. The first sleeve is partially inserted into the second sleeve, with a clubhead sleeve at its extended end to separate and limit the clubhead. The bottom of the second sleeve has a grip fixing sleeve to secure the club grip, and the top is fixed with a telescopic assembly fitted over the first sleeve, allowing for adjustable sleeve length to accommodate different golf clubs. The clubhead sleeve has a U-shaped groove for stable clamping of the clubhead. The grip fixing sleeve consists of a cylindrical body and elastic claws for elastic clamping. The telescopic assembly includes a third sleeve and a fourth sleeve, which are connected by a sliding groove and a protruding ridge, and utilize the circumferentially tapered structure of the first and second arc-shaped petals to achieve unlocking and locking through relative rotation. This invention offers adjustable length, stable fixation, simple operation, high structural strength, effective protection for golf clubs, and strong versatility and practicality.

Description

Technical Field

[0001] This invention belongs to the technical field of golf club accessories, and particularly relates to a telescopic locking sleeve for golf clubs, used to fix golf clubs. Background Technology

[0002] Golf, as a sport that combines recreation and competition, is widely enjoyed. Golf clubs are typically stored in golf bags during transport and storage. Most commercially available golf bags use internal dividers, straps, or simple compartments to organize the clubs. For example, US Patent Application Publication No. US20250345673A1 discloses a golf bag with a foldable pocket assembly, which... Figure 2 and 3 All of these examples demonstrate that golf bags use only simple dividers to organize the clubs. For instance, US Patent Application Publication No. US20250352872A1 discloses a golf bag with a pivoting hinge for a carrying strap, its appended... Figure 1 and 2 All of these examples demonstrate that golf bags use only simple dividers to separate the clubs. This approach only provides a rough separation of the golf clubs and lacks an effective positioning and securing structure for each individual club.

[0003] In practical use, especially during movement, transport, or handling, golf clubs are prone to moving up and down and swaying left and right inside the bag. Frequent collisions and friction occur between different clubs and between the clubs and the inner wall of the bag. Long-term or severe collisions can easily cause scratches on the club shaft coating, wear on the paint on the clubhead, and peeling of the electroplating layer. In severe cases, it can even lead to clubhead deformation and loosening of the connection parts, affecting the appearance and performance of the club and shortening its service life.

[0004] To address the aforementioned issues, existing technologies have attempted to reduce collisions by adding cushioning pads or improving partition layers. However, these methods only reduce the impact force and cannot fundamentally limit the displacement of the club within the bag. Furthermore, they are difficult to adapt to golf clubs of different lengths and specifications, resulting in poor versatility.

[0005] Therefore, in response to the problems of unstable fixation, easy shaking and collision, easy scratches and damage, and insufficient adaptability of existing golf clubs when stored in golf bags, there is an urgent need for a device with a simple structure, convenient adjustment, and the ability to stably fix golf clubs in order to achieve reliable positioning of golf clubs of different lengths in golf bags and avoid shaking and damage during transportation. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides a telescopic locking sleeve for golf clubs, which solves the problems of unstable fixation, easy shaking and collision, easy scratches and damage, and insufficient adaptability of existing golf clubs when stored in golf bags.

[0007] The technical solution of the present invention is as follows: A telescopic locking sleeve for a golf club includes a first sleeve and a second sleeve, wherein the first sleeve is partially inserted into the second sleeve; a clubhead sleeve is provided on the extended end of the first sleeve, the clubhead sleeve being used to separate and limit the clubhead of the golf club; a grip fixing sleeve is provided on the bottom of the second sleeve, the grip fixing sleeve being used to separate and fix the grip of the golf club; a telescopic component is fixed on the top of the second sleeve, the telescopic component being sleeved outside the first sleeve, driving the second sleeve to move away from or towards the first sleeve, thereby stretching or contracting the telescopic locking sleeve and adjusting its length to suit golf clubs of different lengths.

[0008] The clubhead sleeve has a sleeve portion and a U-shaped groove, the U-shaped groove extending laterally from the upper part of the sleeve portion; the lower part of the sleeve portion is fixedly connected to the extended end of the first sleeve; the U-shaped groove is engaged with the bottom or neck of the golf clubhead, restricting the circumferential rotation and lateral movement of the clubhead.

[0009] The connection between the U-shaped groove and the sleeve portion has an arc-shaped transition to adapt to the curved surface profile of the connection between the clubhead and the golf club;

[0010] The bottom surface of the U-shaped groove is inclined upward relative to the horizontal surface, and the opposite side walls of the U-shaped groove are asymmetrically distributed, with one side being straight and the other side being inclined, to adapt to the shape of the rod head and form a stable support for the rod head.

[0011] The outer diameter of the top of the sleeve section and the U-shaped groove is slightly larger than that of the lower section, forming a shoulder transition.

[0012] The grip fixing sleeve includes a cylinder and several elastic claws; the several elastic claws are evenly distributed in a ring on the inner wall of the cylinder, and the root of each elastic claw is fixed to the cylinder, and its clamping end is inclined towards the central axis of the cylinder, so that it can be radially contracted or opened, thereby elastically clamping the golf club grip.

[0013] The holding end is provided with an arc-shaped contact surface.

[0014] The included angle α between the elastic claw and the inner wall of the cylinder is 10°≦α≦80°.

[0015] The telescopic assembly includes a third sleeve and a fourth sleeve; the top of the second sleeve is inserted into and fixedly connected to the third sleeve; the third sleeve is inserted into the fourth sleeve and slidably connected to the fourth sleeve; the outer wall of the third sleeve and the inner wall of the fourth sleeve are respectively provided with mutually cooperating grooves and protrusions, which are locked together. The outer wall of the third sleeve has a stepped surface in the middle, and the bottom surface of the fourth sleeve is adapted to the stepped surface.

[0016] The inner side of the stepped surface is provided with a ring-shaped boss, and the groove or protrusion is provided on the outer side of the ring-shaped boss; the top of the ring-shaped boss is integrally formed with multiple first arc-shaped lobes, and a longitudinal slot is opened between adjacent first arc-shaped lobes, so that the multiple first arc-shaped lobes together enclose an open cylindrical structure; the thickness of each first arc-shaped lobe gradually decreases along its circumference from the side closer to one of the adjacent first arc-shaped lobes to the side closer to another adjacent first arc-shaped lobe, on its outer wall side, so as to form an elastically deformable clamping or guiding structure. The inner side of the fourth sleeve is integrally formed with multiple second arc-shaped lobes, and longitudinal slots are also formed between adjacent second arc-shaped lobes; the thickness of each second arc-shaped lobe gradually increases along its circumference from the side closer to one of the adjacent second arc-shaped lobes to the side closer to the other adjacent second arc-shaped lobes on its inner wall side, thereby fitting with the corresponding first arc-shaped lobe; the thicker side of the second arc-shaped lobe fits with the thinner side of the first arc-shaped lobe, and the thinner side of the second arc-shaped lobe fits with the thicker side of the first arc-shaped lobe.

[0017] The third sleeve is further provided with a limiting protrusion on the stepped surface, and the fourth sleeve is provided with a limiting groove at the position corresponding to the limiting protrusion. The limiting protrusion is accommodated in the limiting groove, thereby limiting the angular range of relative rotation between the third sleeve and the fourth sleeve in the circumferential direction.

[0018] The beneficial effects of this invention are as follows: 1. The telescopic locking sleeve for golf clubs of the present invention, through the telescopic adjustment function of the telescopic component, can drive the second sleeve to move closer to or further away from the first sleeve, thereby achieving flexible adjustment of the entire locking sleeve length. It can adapt to golf clubs of different lengths, eliminating the need for special locking sleeves for clubs of different sizes, reducing usage costs and improving ease of use.

[0019] 2. The telescopic locking sleeve for golf clubs described in this invention features a clubhead sleeve that precisely engages the bottom or neck of the clubhead via a U-shaped groove. Combined with asymmetrical sidewalls, an inclined groove bottom, and an arc-shaped transition structure, it stably restricts the circumferential rotation and lateral movement of the clubhead while separating adjacent clubheads to prevent collisions and wear. The grip retaining sleeve uses evenly distributed ring-shaped elastic claws to elastically clamp the grip, adapting to grips of different sizes of golf clubs while effectively preventing the club from wobbling or falling off, further enhancing stability and providing comprehensive protection for the golf club.

[0020] 3. The telescopic lock sleeve for golf clubs of the present invention features a shoulder transition between the sleeve portion of the clubhead sleeve and the top of the U-shaped groove, and uses TPU plastic material to effectively improve its bending and torsional resistance, preventing deformation and breakage under lateral or impact forces; reinforcing ribs are provided between the elastic claw and the cylinder body to enhance the strength of the claw root and prevent damage after long-term elastic deformation; the cooperation between the limiting protrusion and the limiting groove in the telescopic assembly can prevent disengagement, structural interference, and damage to the elastic flap caused by excessive rotation of the third and fourth sleeves, while the convex ring structure can prevent the third sleeve from over-extending during reset. The overall structural design is reasonable, significantly improving the structural stability and service life of the lock sleeve.

[0021] 4. The telescopic locking sleeve of the golf club described in this invention has a multi-faceted structure on the outer walls of the third and fourth sleeves of the telescopic assembly, which facilitates gripping and relative rotation. Combined with the complementary thickness of the first and second arc-shaped petals, telescopic unlocking and locking can be achieved simply by rotating, making operation simple and effortless. The inclination direction of the elastic claw is consistent with the grip insertion direction, ensuring smooth grip insertion. The arc-shaped contact surface of the locking end can prevent scratching the grip and improve the user experience.

[0022] 5. The telescopic locking sleeve for golf clubs described in this invention has elastic claws that can be radially retracted or expanded to adapt to golf club grips of different sizes and shapes within a certain range without additional adjustment; the number of elastic claws is preferably even and the included angle is controlled within 10°≦α≦80°, which ensures sufficient clamping force and provides reasonable elastic deformation space, taking into account both versatility and clamping stability, and adapting to a variety of usage scenarios. Attached image description: To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the telescopic locking sleeve of the golf club according to the present invention.

[0024] Figure 2 This is another structural schematic diagram of the telescopic locking sleeve of the golf club described in this invention.

[0025] Figure 3 This is a top view of the telescopic locking sleeve of the golf club according to the present invention.

[0026] Figure 4 For along Figure 3 A cross-sectional view along line AA in the middle.

[0027] Figure 5 This is a front view of the telescopic locking sleeve of the golf club according to the present invention.

[0028] Figure 6 For along Figure 5 A cross-sectional view along the BB line.

[0029] Figure 7 This is a bottom view of the telescopic locking sleeve of the golf club according to the present invention.

[0030] Figure 8 This is an exploded view of the golf club described in this invention.

[0031] Figure label: 10. First sleeve; 11. Extended end; 20. Second sleeve; 21. Bottom of the second sleeve; 30. Club head sleeve; 31. Sleeve section; 32. U-shaped groove; 33. Connection between U-shaped groove and sleeve section; 34. Groove bottom surface; 35. 36. Side wall; 37. Shoulder transition; 40. Grip fixing sleeve; 41. Cylinder body; 42. Elastic claw plate; 43. Root; 44. Clamping end; 45. Arc-shaped contact surface; 46. Reinforcing rib; 50. Telescopic assembly; 51. Third sleeve; 52. Fourth sleeve; 53. Slide groove; 54. Raised ridge; 55. Stepped surface; 56. Raised ridge; 57. Annular boss; 58. First arc-shaped petal; 59. Longitudinal slot; 60. Second arc-shaped petal; 61. Limiting protrusion; 62. Limiting groove; 63. Raised ring. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain embodiments of the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] Refer to Figure 1- Figure 2 The telescopic locking sleeve for a golf club includes a first sleeve 10 and a second sleeve 20, with the first sleeve 10 partially inserted into the second sleeve 20. A clubhead sleeve 30 is provided on the extended end 11 of the first sleeve 10, used to separate and limit the clubheads of the golf club, preventing adjacent clubheads from colliding. A grip fixing sleeve 40 is provided on the bottom 21 of the second sleeve, used to separate and fix the grips of the golf club, preventing the golf club from wobbling or adjacent golf clubs from colliding. A telescopic component 50 is fixed to the top of the second sleeve 20, sleeved outside the first sleeve 10. The telescopic component 50 drives the second sleeve 20 to move away from or towards the first sleeve 10, thereby stretching or contracting the locking sleeve to adjust its length to suit golf clubs of different lengths.

[0036] Reference Figure 1 and 3-4. The clubhead sleeve 30 has a sleeve portion 31 and a U-shaped groove 32, with the U-shaped groove 32 extending laterally from the upper part of the sleeve portion 31. The lower part of the sleeve portion 31 is fixedly connected to the protruding end 11 of the first sleeve 10. The bottom or neck of the golf club head can be inserted into the U-shaped groove 32, restricting the club head from circumferential rotation and lateral movement within the clubhead sleeve 30. The connection 33 between the U-shaped groove and the sleeve portion has an arc-shaped transition to match the curved contour of the connection between the club head and the club. The bottom surface 34 of the U-shaped groove 32 is inclined upward relative to the horizontal surface. The opposite side walls 35 and 36 of the U-shaped groove 32 are asymmetrically distributed, with one side being straight and the other side inclined, to match the shape of the club head, providing stable support for the club head and maintaining a preset posture within the sleeve to prevent wobbling. After the clubhead is housed in the clubhead sleeve 30, it is limited by the clubhead sleeve 30 and cannot wobble. It is also used to separate adjacent clubheads to prevent them from contacting and colliding with each other.

[0037] The outer diameter of the top end of the sleeve section 31 and the U-shaped groove 32 is slightly larger than that of the lower section, forming a shoulder transition 37, thereby improving the bending and torsional resistance of the clubhead sleeve 30, making it less prone to deformation or breakage when subjected to lateral forces from the clubhead or impact forces during transportation.

[0038] Reference Figure 2 , Figure 4 , Figure 7-8 The grip retaining sleeve 40 includes a cylinder 41 and several elastic claws 42. The elastic claws 42 are evenly distributed in a ring on the inner wall of the cylinder 41. The root 43 of each elastic claw 42 is fixed to the cylinder 41, and its holding end 44 is inclined towards the central axis of the cylinder 41. The elastic claws 42 are elastic and can retract or expand radially to hold the golf club grip. In use, the golf club grip is inserted into the grip retaining sleeve 40, squeezing the elastic claws 42 and causing them to expand radially, elastically clamping the golf club grip and stably fixing it in a specific position to prevent it from shaking or falling off. After the golf club grip is removed from the grip retaining sleeve 40, the elastic claws 42 retract radially, ready for the next use.

[0039] The flexible design of the elastic claw plate 42 allows it to be adapted to grips of different sizes or shapes within a range, providing good versatility and compatibility.

[0040] The clamping end 44 is provided with an arc-shaped contact surface 45, which increases the contact area with the grip, disperses the clamping stress, and effectively prevents the elastic claw 42 from scratching the grip surface when in contact.

[0041] The number of elastic claw plates 42 is 2-16, preferably an even number, which can make the clamping force evenly distributed on the circumference of the grip, improving the stability and reliability of clamping.

[0042] Reference Figure 7 A reinforcing rib 46 is provided between the elastic claw plate 42 and the cylinder 41 to connect the two. The reinforcing rib 46 improves the strength and rigidity of the root 43 of the elastic claw plate 42, so that the elastic claw plate 42 maintains structural stability in long-term and repeated elastic deformation and extends its service life.

[0043] Reference Figure 4 The included angle α between the elastic claw 42 and the inner wall of the cylinder 41 is 10°≦α≦80°. The included angle α, ranging from 10° to 80°, can provide a reasonable elastic deformation space while ensuring sufficient clamping force, making the clamping action more stable, and at the same time avoiding the elastic claw 42 from being too rigid due to an excessively large angle or too weak due to an excessively small angle.

[0044] Reference Figure 4 The elastic claw plate 42 is inclined towards the end of the cylinder 41 inside the cylinder 41, and its inclination direction is consistent with the direction in which the golf club grip is inserted into the cylinder 41, which can ensure smooth insertion of the grip and improve the smoothness of insertion.

[0045] The bottom 21 of the second sleeve extends into the cylinder 41 and abuts against the root 43 of the elastic claw 42, and is fixedly installed thereto, thereby preventing relative displacement between the cylinder 41 and the second sleeve 20.

[0046] Reference Figure 4 , Figure 5-6 and Figure 8 The telescopic assembly 50 includes a third sleeve 51 and a fourth sleeve 52. The top of the second sleeve 20 is inserted into and fixedly connected to the third sleeve 51. The third sleeve 51 is inserted into the fourth sleeve 52 and is slidably connected to the fourth sleeve 52; specifically, the outer wall of the third sleeve 51 and the inner wall of the fourth sleeve 52 are respectively provided with mutually cooperating grooves 53 and protrusions 54, which are engaged and connected.

[0047] The outer wall of the third sleeve 51 has a stepped surface 55 in the middle, and the bottom surface of the fourth sleeve 52 is adapted to this stepped surface 55, so that the outer wall of the third sleeve 51 is flush with the outer wall of the fourth sleeve 52. The outer wall of both the third sleeve 51 and the fourth sleeve 52 is polyhedral, and protruding ridges 56 are formed between adjacent surfaces, which facilitates gripping the third sleeve 51 and the fourth sleeve 52 and allows them to rotate relative to each other.

[0048] An annular boss 57 is provided on the inner side of the stepped surface 55, and a groove 53 or a protruding ridge 54 is provided on the outer side of the annular boss 57. The top of the annular boss 57 is integrally formed with multiple first arc-shaped lobes 58, and a longitudinal slot 59 is formed between adjacent first arc-shaped lobes 58, so that the multiple first arc-shaped lobes 58 together form an open cylindrical structure. The thickness of each first arc-shaped lobe 58 gradually decreases along its circumference from the side closer to one of the adjacent first arc-shaped lobes 58 to the side closer to another adjacent first arc-shaped lobe 58, on its outer wall side, so as to form an elastically deformable clamping or guiding structure.

[0049] The inner surface of the fourth sleeve 52 is integrally formed with multiple second arc-shaped petals 60, and longitudinal slots 59 are also formed between adjacent second arc-shaped petals 60. The thickness of each second arc-shaped petal 60 gradually increases along its circumferential direction from the side closer to one of the adjacent second arc-shaped petals 60 to the side closer to the other adjacent second arc-shaped petal 60 on its inner wall surface, so as to fit with the corresponding first arc-shaped petal 58, and the thicker side of the second arc-shaped petal 60 fits with the thinner side of the first arc-shaped petal 58, and the thinner side of the second arc-shaped petal 60 fits with the thicker side of the first arc-shaped petal 58. When the fourth sleeve 52 and the third sleeve 51 rotate relative to each other, each second arc-shaped petal 60 squeezes each first arc-shaped petal 58 to contract and move closer together, thereby unlocking the locking connection between the protrusion 54 and the groove 53, so that the third sleeve 51 and the fourth sleeve 52 can move relative to each other in the longitudinal direction to achieve stretching.

[0050] In the telescopic assembly 50 of this application, the third sleeve 51 and the fourth sleeve 52 are easily gripped and rotated relative to each other through the polyhedral structure on their outer walls. Under normal conditions, the outer wall of the third sleeve 51 and the inner wall of the fourth sleeve 52 are mutually engaged by the sliding groove 53 and the protrusion 54, and the two are axially limited and cannot extend or retract.

[0051] When the user holds and rotates the third sleeve 51 and the fourth sleeve 52, the second arc-shaped petal 60 on the inner side of the fourth sleeve 52 and the first arc-shaped petal 58 on the third sleeve 51 rotate relative to each other circumferentially. Because the first arc-shaped petal 58 and the second arc-shaped petal 60 adopt a complementary thickness and circumferentially varying fit structure, during relative rotation, the thicker part of the second arc-shaped petal 60 gradually presses against the thinner part of the first arc-shaped petal 58, forcing the first arc-shaped petal 58 to undergo radially inward elastic contraction deformation. This, in turn, causes the locking structure between the slide groove 53 and the protrusion 54 to disengage, thus unlocking the device.

[0052] After unlocking, the slide groove 53 and the protrusion 54 no longer engage with each other, and the third sleeve 51 and the fourth sleeve 52 can slide relative to each other along the axial direction to complete the stretching action; when rotating in the opposite direction, the first arc-shaped petal 58 resets under its own elastic action, and the slide groove 53 and the protrusion 54 re-engage to achieve axial locking, thereby completing the cycle of extension and locking.

[0053] The third sleeve 51 is provided with a limiting protrusion 61 on the stepped surface 55, and the fourth sleeve 52 is provided with a limiting groove 62 at the position corresponding to the limiting protrusion 61. The limiting protrusion 61 is accommodated in the limiting groove 62, thereby limiting the angular range of relative rotation between the third sleeve 51 and the fourth sleeve 52 in the circumferential direction. This prevents the two from disengaging, interfering with the structure, or being damaged by excessive deformation of the elastic flap due to excessive rotation, ensuring that the telescopic component 50 operates stably and reliably during unlocking and locking, and improving the overall structural safety and service life.

[0054] The inner side of the top surface of the fourth sleeve 52 is provided with a protruding ring 63, which can abut against the top of the first arc-shaped petal 58. When the third sleeve 51 retracts relative to the fourth sleeve 52, the protruding ring 63 forms an axial limit by abutting against the top of the first arc-shaped petal 58, thereby preventing the top of the third sleeve 51 from excessively protruding from the fourth sleeve 52, ensuring that the third sleeve 51 and the fourth sleeve 52 have a regular structure and reliable fit in the retracted state.

[0055] The above description, in conjunction with specific preferred embodiments, provides a detailed explanation of the present invention and should not be construed as limiting the specific implementation of the invention to these descriptions. For those skilled in the art, the architectural form of this invention can be flexibly varied without departing from its conceptual framework, leading to the development of a series of products. Any simple deductions or substitutions should be considered as falling within the patent protection scope defined by the submitted claims.

Claims

1. A telescopic locking sleeve for a golf club, comprising a first sleeve and a second sleeve, wherein the first sleeve is partially inserted into the second sleeve; characterized in that, The first sleeve has a clubhead sleeve on its extended end, which is used to separate and limit the clubhead of the golf club; the second sleeve has a grip fixing sleeve on its bottom, which is used to separate and fix the grip of the golf club; the top of the second sleeve is fixed with a telescopic component, which is sleeved on the outside of the first sleeve and drives the second sleeve to move away from or towards the first sleeve, thereby stretching or contracting the telescopic sleeve and adjusting its length to suit golf clubs of different lengths.

2. The telescopic locking sleeve for a golf club according to claim 1, characterized in that, The clubhead sleeve has a sleeve portion and a U-shaped groove, the U-shaped groove extending laterally from the upper part of the sleeve portion; the lower part of the sleeve portion is fixedly connected to the extended end of the first sleeve; the U-shaped groove is engaged with the bottom or neck of the golf clubhead, restricting the circumferential rotation and lateral movement of the clubhead.

3. The telescopic locking sleeve for a golf club according to claim 2, characterized in that, The connection between the U-shaped groove and the sleeve portion has an arc-shaped transition to adapt to the curved surface profile of the connection between the clubhead and the golf club; The bottom surface of the U-shaped groove is inclined upward relative to the horizontal surface, and the opposite side walls of the U-shaped groove are asymmetrically distributed, with one side being straight and the other side being inclined, to adapt to the shape of the rod head and form a stable support for the rod head.

4. The telescopic locking sleeve for a golf club according to claim 2, characterized in that, The outer diameter of the top of the sleeve and the U-shaped groove is slightly larger than that of the lower section, forming a shoulder transition.

5. The telescopic locking sleeve for a golf club according to any one of claims 1-4, characterized in that, The grip fixing sleeve includes a cylinder and several elastic claws; the several elastic claws are evenly distributed in a ring on the inner wall of the cylinder, and the root of each elastic claw is fixed to the cylinder, and its clamping end is inclined towards the central axis of the cylinder, so that it can be radially contracted or opened, thereby elastically clamping the golf club grip.

6. The telescopic locking sleeve for a golf club according to claim 5, characterized in that, The holding end is provided with an arc-shaped contact surface.

7. The telescopic locking sleeve for a golf club according to claim 5, characterized in that, The included angle α between the elastic claw and the inner wall of the cylinder is 10°≦α≦80°.

8. The telescopic locking sleeve for a golf club according to any one of claims 1-4, 6-7, characterized in that, The telescopic assembly includes a third sleeve and a fourth sleeve; the top of the second sleeve is inserted into and fixedly connected to the third sleeve; the third sleeve is inserted into the fourth sleeve and slidably connected to the fourth sleeve; the outer wall of the third sleeve and the inner wall of the fourth sleeve are respectively provided with mutually cooperating grooves and protrusions, which are locked together. The outer wall of the third sleeve has a stepped surface in the middle, and the bottom surface of the fourth sleeve is adapted to the stepped surface.

9. The telescopic locking sleeve for a golf club according to claim 8, characterized in that, The inner side of the stepped surface is provided with a ring-shaped boss, and the groove or protrusion is provided on the outer side of the ring-shaped boss; the top of the ring-shaped boss is integrally formed with multiple first arc-shaped lobes, and a longitudinal slot is opened between adjacent first arc-shaped lobes, so that the multiple first arc-shaped lobes together enclose an open cylindrical structure; the thickness of each first arc-shaped lobe gradually decreases along its circumference from the side closer to one of the adjacent first arc-shaped lobes to the side closer to another adjacent first arc-shaped lobe, on its outer wall side, so as to form an elastically deformable clamping or guiding structure. The inner side of the fourth sleeve is integrally formed with multiple second arc-shaped lobes, and longitudinal slots are also formed between adjacent second arc-shaped lobes; the thickness of each second arc-shaped lobe gradually increases along its circumference from the side closer to one of the adjacent second arc-shaped lobes to the side closer to the other adjacent second arc-shaped lobes on its inner wall side, thereby fitting with the corresponding first arc-shaped lobe; the thicker side of the second arc-shaped lobe fits with the thinner side of the first arc-shaped lobe, and the thinner side of the second arc-shaped lobe fits with the thicker side of the first arc-shaped lobe.

10. The telescopic locking sleeve for a golf club according to claim 9, characterized in that, The third sleeve is further provided with a limiting protrusion on the stepped surface, and the fourth sleeve is provided with a limiting groove at the position corresponding to the limiting protrusion. The limiting protrusion is accommodated in the limiting groove, thereby limiting the angular range of relative rotation between the third sleeve and the fourth sleeve in the circumferential direction.

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