TW550105B - A shaft - Google Patents

Abstract

A golf club shaft is provided including a metal tip section and a composite butt section. The butt section includes a reduced diameter portion telescopically received within an axial bore of the tip section. An adhesive is disposed between the tip section and the butt section to secure the two together. An insulating layer may be disposed between the tip section and the butt section to prevent galvanic corrosion.

Description

550105 A: ~ -------- B7 V. Description of the invention (work) The present invention relates to a golf club with improved functional characteristics, especially two pieces of golf clubs, which are combined with a metal part, and A composite material part to maintain the advantages of both materials and reduce their disadvantages. Control and accuracy in golf competitions are affected by the torsional stiffness of the handle. The club's torsional stiffness resists twisting of the club head when it swings, especially when there is imperfect contact between the golf ball and the club head. The most common metal golf club handle is steel, which is often used by many golfers. The advantage of metal shanks is the high torsional stiffness known in the industry as a low-torque shank. Many golf club manufacturers offer composite shafts, often called graphite shafts, which are usually made of graphite or carbon fiber and epoxy resin. Composite handles can be significantly lighter than metal rods, but conventional graphite rods have lighter torsional stiffness than steel handles. Therefore, it is known that graphite handles have higher torque than steel rods. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. To make the composite handle stiffer in torque, manufacturers use different fiber types, such as high coefficient carbon, aromatic polyamide and epoxy fibers. They can be modified to improve torsional stiffness by encapsulating the fibers at different angles. Most of these changes increase costs and often have a negative effect on the operability of the handle. Recent studies have shown that only the tip of the club is equipped with resistance to torsion to prevent twisting due to poor ball / head contact with the club head ^ The contact between the stem and the ball is a very transient dynamic, and only the tip of the stem Shares are loaded during this time. The full length of the event on the pole 4 55〇 105

Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, effectively ending before the load. Therefore, it is preferable that the tip portion of the shank is made of a metal having high torque hardness, such as steel, and the barrel portion is made of a composite material having low torque, such as graphite. In this way, the effective moment characteristics of the rod can be enhanced while maintaining a light weight. The advantages of an attempt to merge metal and composite handles have been disclosed in U.S. Patent No. 4,836,545. However, 卩 〇〇 ^ 3 did not disclose the impact of the physical characteristics of the two handle parts on the performance of the handle. The test also found that the weight of the metal tip was very heavy compared to the barrel of the composite material. When the tip portion is too heavy, the center of gravity (CG) of the club will move toward the tip, which unduly increases the swing weight of the club. The swing weight is measured at a point of about 14 端 from the end of the grip. The absolute weight of the head and the balance point (CG position), the club and the grip all affect the swing weight of the club. Although most club manufacturers generally set the weight of the head to know the club and grip specifications to achieve the desired club swing weight, this method may not always be effective. Component suppliers basically provide ball head weights that meet industry-accepted weight ranges. In this case, it is best to prepare a rod that can be used with such a head to achieve the ideal club swing weight. In addition, it is best not to carry a second weight on the head to achieve the desired club swing weight. The second weight is usually introduced at the tip of the handle ' where the handle is inserted into the sleeve of the head. This position is not ideal because it is away from the center of gravity of the head ', which reduces the force with which a given swing speed moves to the ball. Less force transfer to the ball will reduce the ball's forward 5 The paper size is common Chinese National Standard (CN-S) A4 specification (2) ϋχ297 mm) ^ -------- ^ --- ------ ^ ^ f First read the urgent matter on the back before filling out this page) 550105

distance.

Pompa also did not understand the difficulties of the metal and composite parts of the connecting shank. The joint must be beautiful and strong enough to prevent it from separating. Because of the above, it is better to have an improved golf ball talent. Its T exhibits the advantages of metal and composite materials, and at the same time reduces its individual disadvantages. The main purpose and objective of the present invention is to prepare a golf club with a single hybrid design combining the respective advantages of metal and composite material handles. Another object of the present invention is to reduce the respective disadvantages of metal and composite handles to form a single hybrid design golf club. Another object of the present invention is to provide a method for manufacturing a golf club having a tip portion of a metal material and a barrel portion made of a composite material. Another object of the present invention is to provide a method and a device to achieve the above-mentioned object 'while complying with the golf rules defined by the American Golf Association. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs According to an embodiment of the present invention, a golf club including a metal tip portion and a composite barrel-shaped component is prepared. The cylindrical tip portion is made of a metal material such as steel. The cylindrical barrel-shaped portion is made of a composite material such as graphite, and includes a small diameter portion or pin on one end thereof. The peg of the barrel portion is telescopically received on the end of the tip portion so that the end of the tip portion is stacked on the barrel 6

This paper outlines Chinese National Standard (C1 \ 'S) A4 size⑵G X 297g g 550105

V. Description of the invention (4) Reduce the diameter part of the printed part for consumer cooperation of the Ministry of Economic Affairs of the Ministry of Intellectual Property. Adhesives such as epoxy are placed between the tip and barrel-shaped parts to hold the two parts together. m $ —In the embodiment, the '-insulation layer ss · is placed between the tip and the barrel-shaped part; J ^ stops the contact between the metal and the repeating material in the metal / composite material joint, and prevents the metal-composite material from contacting 1¾ The insulation reduces the number of electrodes in the connector. The spacer and color layer can form several insulating spacers, such as a glass bead or a glass layer in a barrel-shaped portion built into the joint. The invention and its other objects and features will be better understood with reference to the following drawings. Fig. 1 is a schematic side view of a golf club according to the present invention; Fig. 2 shows the relationship between torsional resistance and the length of a metal tip; Fig. 3 shows the relationship between torsional resistance and the length of a composite material tip; Figure shows the relationship between club weight and tip length and its effect on club swing weight; Figure 5 is a cross-sectional view of the metal / composite joint of the golf club of Figure 1; Figure 6 shows the handle of the present invention The relationship between the bending hardness of the tip and the bending hardness of the conventional steel handle; Figure 7 shows the relationship between the thickness of the tip wall of the handle of the present invention and the thickness of one of the conventional steel handles; 7 ^^ Applicable to China A4 size⑵G x 297 i ^ T- --— — — In— ^ · 1111111 · (Please read the notes on the back before filling in; this page> 550105

V. Description of the invention (5) FIG. 8 shows the relationship between the wall thickness of the barrel-shaped part of the handle of the present invention and the thickness of the barrel-shaped wall of the conventional graphite rod; A cross-sectional view of a golf club-metal / composite joint; Figure 10 is a cross-sectional view of a metal / composite joint of a golf club according to the third embodiment of the present invention; 113 and 116 are cross-sectional views of a metal / composite joint of a golf club according to FIG. 1 of the fourth embodiment of the present invention. DESCRIPTION OF THE INVENTION Referring to Fig. 1, there is shown a golf club 10 having a grip 12, a head 14 and a tubular shank 16. Although the club 10 in the circle is made of wood, it may be made of iron or a bat handle 16. It includes a tip portion 18 and a barrel portion 20. The tip portion 18 is preferably made of a metal material such as high-tensile steel, and the barrel portion 20 is preferably formed of a composite material such as graphite. The handle 16 in the figure has smooth, tapering side walls 22, but it can also be replaced by parallel or stepped side walls. Printed by the Economic and Intellectual Property Bureau employee consumer cooperative. The tip portion 18 fixes the head portion 14 at its lower end 24 by a club head sleeve of a size that conforms to the standard. The upper end 26 of the tip portion 18 is telescopically and slidably mounted on the lower end 28 of the barrel portion 20. The physical characteristics of the tip portion 18 from the head 14 to the joint 30 that meets the barrel-shaped portion 20 are designed to provide the desired torsional hardness, bending hardness (flexibility); strength, and balance of weight. When combining 8 paper sizes with Chinese national standard (〇 ^) and 8 4 specifications (2) (^ 297 mm) " " 550105

The best maneuverability is obtained when the barrel is made of composite material. The relationship between the physical characteristics of the tip portion 18 and the operability of the shank 16 is complicated, and many factors must be considered. 1) When the metal tip portion 18 is shortened, the torque hardness it is provided with becomes less important. As the tip portion becomes longer, the weight of the tip portion 18 becomes more important. 2) It is best to maintain industry standard diameters of .335 or .350 pairs on the lower end 24 of the tip portion 18 to meet industry standard golf club heads. However, the diameter can be increased toward the upper end 26 of the tip portion 18 to increase the torque and joint stiffness. 3) For the tip portion 18 of the same weight, the diameter on the upper end 26 reduces wall thickness and durability. 4) In order to reduce the weight of the tip portion 18 to the lightest, the wall of the tip portion 18 can be made thicker. However, when the wall thickness decreases, the tip part! The strength and hardness of 8 will decrease. 5) As the diameter and wall thickness of the tip portion 18 can be changed, the f-curve hardness (flexibility) can also be changed. If the bending stiffness (flexibility) is too high or the operability is too low, and the feel of the handle becomes unacceptable. Good operability and durability tests have allowed an acceptable geometric range of the tip portion 18 of a 46-inch wooden handle with a weight of 65 g to 90 g and define its preferred geometry. If the length of the tip part is less than 6 inches, it cannot be prepared. ^ Paper corpse, the degree applies to Chinese standards " Line 550105

V. Description of the invention (7) Sufficient torque hardness to improve the correctness of striking. Figure 2 shows how using a torque test, the club's torque decreases as the tip portion decreases. Figure 3 shows the lower moment characteristics of a steel tip compared to a graphite tip. If the tip portion 18 is larger than 12 inches, the handle weight will increase, and the center of gravity position of the handle 16 will move too far toward the tip 24. Figure 4 shows how the weight of the handle increases with tip length. Section 4 also shows that due to the shank weight prepared between the tip lengths of 6 and 12 inches, an industrially acceptable head weight can be used to reach club swing weights in the range of ^ to ^. If the diameter of the upper end 26 of the tip portion 18 is increased to more than · 415 inches, the bending hardness will become very high, which will adversely affect the flexibility of the tip and prepare a low ball parabola and a thick chain feel . Similarly, if the diameter of the upper end 26 of the tip portion 18 is reduced to less than · 385 inches, the bending hardness becomes unduly low too much, and a ball with a southern parabola and a club with a soft feel is prepared. & Jibei Intellectual Property Bureau employee consumer cooperative printed durability with an air cannon has shown the tip part] 8 upper end 26 is higher than .415 inches in diameter, total weight is less than 65g, and length is 6 to 12 The handle 16 within an inch range cannot be provided with a tip portion 18 of sufficient durability. In the preferred embodiment, a 46-inch wooden handle weighs 75g, and the tip portion 18 is 8 inches in length, while the upper end 26 has a diameter of .4 and the lower end 24 has a diameter of .335 or .350. guess. The torque of this preferred tip part 18 is measured in a 8-inch pair when a torque test is used.

550105 -------- -B: 5. Description of the invention (g) Moment of length less than 0.6 degrees. This is 1.5 ° higher than the tip of a basic graphite handle measured using the same test method. Referring now to Fig. 5, it shows the details of the joint 30 of Fig. 1. An important factor affecting the durability of the handle 16 is the strength of the joint 30 between the metal tip portion 18 and the composite barrel portion 20. As shown, the tip portion 18 has a hollow metal cylindrical shape, and the barrel portion 20 has a hollow composite cylindrical shape. The barrel portion 20 includes a reduced-diameter cylindrical portion or plug 32 for insertion into the tip portion 18. The reduced-diameter cylindrical portion 32 may be formed when the composite material barrel portion 20 is layered, or may be formed by grinding away a predetermined annular amount of barrel material after initial formation. The size of the reduced diameter cylindrical portion 32 ensures sufficient weight and strong interconnection with the tip portion 18. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Cooperative's printed metal tip portion 18 and composite barrel portion 20 are connected to an adhesive such as epoxy bonding agent 31. The thickness of the adhesive 31 is carefully controlled, and the tip portion 18 and the barrel portion 20 along the surface area of the adhesive 31 are sufficient to ensure sufficient strength. The joining strength is selected so that the joint 30 is disengaged when the golf ball is subjected to a torsion and gravity from a large ship. Limiting the maximum thickness of the adhesive 3 并 and increasing the surface area of the joint 30 in winter can also maintain the highest straightness standard of the combined handle 16. Static and dynamic durability tests have shown that the joint thickness must be controlled between .003 " and .006 .. The test also shows that, as far as a metal tip portion 18 with a diameter of the upper end 26 between 0.385〃 and 0.4Ί5 ", 11 this paper size is applicable to the Chinese National Standard (CNS) A4 specification m0x 297g g) 550105. . The material barrel portion 20 must be inserted between the metal tip portion 18 of about 0.75 to about 5 "in order to provide a sufficient joint area. In a preferred embodiment, a 46 inch The thickness of the handle driver is .0045〃, and the barrel portion 20 of the composite material is inserted into the metal tip portion 18 by 1.25〃. This construction is to prove the sufficient strength and flatness of the combined handle 16. Defining the handle's flexible handle] The entire crossbow hardness of 6 is affected by the design of the tip portion 18 barrel-shaped portion 20 and the configuration of the joint 30. The local hardness on the joint can be very high, and the length of the joint 30 must be able to be provided with sufficient durability, but not excessively rigid. Different types of clubs with different swing characteristics have different bending. It is acceptable in the industry. The True Temper Dynamic (trademark) handle is usually used as a reference point. Using the configuration range defined above and the weight of the entire shank, Figure 6 shows that the bending stiffness of the shank of the joint ί 6 is compared with the dynamic shank to ensure a good feel and the ideal ball flying out. The hardness of the shank in circle 6 was measured when the tip was tilted in a simple cantilever gravity test. Figures 7 and 8 compare the wall thickness along the length of the metal tip portion 18 of the handle 16 of a preferred embodiment with the popular True

Temper Dynamic (trademark) steel handle and popular Grafalloy

Wall thickness found in Prolite (trademark) graphite handles. Obviously, the wall thickness of the shank 16 is different from the actual Temper steel and Graphite graphite shank. This shows that the handle 16 cannot be joined by the steel on the market and 12 Νί, -r; face μ Η order ^ 9; 550105 10

It is made by cutting the tip and barrel-shaped part of the graphite handle. Referring to Figure 5, the formation of the reduced diameter portion 32 also defines an edge of a radial wall 34 of the barrel portion 20. Although the radial wall 34 shown in the figure extends vertically to the reduced-diameter cylindrical portion 32, the radial wall 34 may form an obtuse or acute angle with respect to the reduced-diameter cylindrical portion 32. The radial wall 34 is preferably formed to be the same as or slightly smaller than the thickness of the end 38 of the tip portion 18 and the thickness of the adhesive 31 to form a smooth wall that abuts the tip portion of the perimeter of the handle 30 along the rth A concentric turn between 18 and the barrel section 20. Referring now to Fig. 9, there is shown a second embodiment of the present invention. In this embodiment, the same elements as those of the previous embodiment are denoted by the same reference numerals, but 200 is added. The second embodiment is different from the foregoing embodiment in that an insulating layer 252 inserted as a plurality of spacers is formed between the tip portion 218 and the barrel portion 220. The insulating spacer 252 is preferably a bead, and is preferably made of an insulating material such as ceramic or glass. Isolate the bead 252 and prevent the metal of the tip portion 218 from contacting the barrel portion.

1 D 220 graphite to reduce galvanic corrosion in the joint 230. The bead 252 also helps control the alignment and separation of the tip portion 218 and the barrel portion 220. In this regard, the diameter of the bead 252 is selected based on the | gap 242. The adhesive 231 is provided with sufficient space between the bead edges, and the tip portion 218 and the barrel portion 220 are coaxially aligned at the same time to ensure A smooth perimeter adjacent to the handle of joint 230 | surface. Preferably, bead 252 and adhesive 246 are applied to 230

Mix before I i.

I! 13 .Π: 5 ^ aμ) 550105

Turning explanation: H Now refer to FIG. 10, which is a third embodiment of the present invention. In this embodiment, the same elements as those of the previous embodiment are denoted by the same reference numerals, but 300 is added. The third embodiment is different from the foregoing embodiment in that an insulation layer 352 is added as a covering layer between the tip portion 318 and the barrel portion 320. The cover layer 352 is preferably an insulation layer integrally formed along the outer surface of the reduced-diameter portion 332, and is preferably formed of an insulating material such as ceramic or glass to prevent the metal and barrel-shaped portions of the tip portion 31.8. 320 graphite to reduce galvanic corrosion in joint 330. The layer 352 also facilitates the alignment and separation of the tip portion 418 relative to the barrel portion 320. The layer 352 is preferably formed by placing a relatively thick glass layer on one end of the barrel portion 320 before the reduced-diameter portion 332 is formed. Then, the reduced-diameter cylindrical portion 332 is ground by grinding a predetermined amount of glass to leave the layer 352 as an outer surface of the reduced-diameter cylindrical portion 332. In this way, the fabric 352 isolates the remaining composite material of the barrel portion 320 from the metal material of the tip portion 318. Referring to Figs. 11a to 11b, a plastic ferrule 500 is added to the joint 430 between the steel tip 418 and the graphite barrel portion 420 when the handle is manufactured. It is formed by appropriate extrusion or injection molding, and is used to accommodate any misalignment in the configuration between the graphite portion 420 and the steel portion 418. The outer diameter of the ferrule 500 is slightly larger than the diameter of the graphite portion 410 or the steel portion 418. Excess material after assembly can be polished by a fine abrasive belt, or one of

Yiji Klfu.i iri employee consumer cooperation. Social seal 550105 Λ: V. Description of the invention (12 ί Cereal wipe is removed from the plastic sleeve 500. In this way, the material removed from the ferrule 500 can be removed in steel and A smooth transition is provided on the outer surface of the graphite portion 41 between 8, 420. The cross section of the ferrule 500 may be different from the rectangle of the i * ia diagram to present an inwardly inclined surface as shown in FIG. 11b. The configuration of this ferrule can be used to accommodate the small radius on the corner of the machine-made graphite barrel-shaped portion 420, which makes the manufacture of the handle 41.6 easier. Referring again to Figures 1 and 2, the handle 16 is shown Manufacturing steps. The length of the hollow cylindrical barrel portion 20 is configured by disposing several layers of pre-selected composite fibers, such as carbon and graphite, at different angles, and bonding them with resin. If desired, the barrel portion 20 can be prepared. Parallel, tapered or stepped side walls. The reduced diameter cylindrical portion 3 2 can be formed at one end of the barrel portion 20 when it is formed, or a pre-selected ring-shaped amount of material can be ground at one end. Hollow circle Length of the cylindrical tip portion 18 by pulling the metal through a mandrel Sheets, such as high-tensile steel or aluminum. If desired, the tip portion 18 can be provided in parallel, tapering, or step side walls. The length and weight of the tip portion 18 are selected as described above. An adhesive Deposited on at least one reduced-diameter cylindrical portion 32 and the tip of the tip portion 18. Then, the reduced-diameter cylindrical portion 32 is telescopically inserted into the tip portion 18. As in section 9 As shown in Fig. 10, an insulating layer 52 may be inserted between the tip portion 18 and the barrel portion 20 to prevent the battery in the connector 30 from corroding. The above is a description of a preferred exemplary embodiment of the present invention. ^ -------- ^ --------- line (4 on the back of begging for reading; lt Jing Xiang again ^ rc: 本 S)

Relief ¥ Intellectual Property: ^ Employee Consumption Cooperative Seal ^ It should be understood that other embodiments are also within the scope of the present invention and the scope of the present invention is defined by the scope of the attached patent application. Yuanyuan reference table 10 Golf club 230 Joint 12 Grip 231 Adhesive 14 Head 232 Reduced diameter cylindrical portion 16 Handle portion 18 Tip portion 234 Radial wall 20 Barrel portion 238 End 22 Side wall 242 Clearance 24 Tip 246 Adhesive 26 Upper end 252 Bead 28 Lower end 316 Handle 30 Joint 318 Tip portion 31 Adhesive 320 Barrel portion 32 Reduced diameter cylindrical portion 330 Joint portion 331 Adhesive 34 Radial wall 332 r. Reduced diameter circle Cylindrical portion 38 end portion 216 shank 334 radial wall 218 tip portion 338 end 220 barrel portion 342 gap 16 The meaning of this paper is applicable to the national standard of China (ν,: ·, Μ; specifications of 7? ) 550105 Λ: η:

V. Description of the invention (U Industrial Consumption Cooperation · Social Printing «344 Adhesive 352 Layer 410 Graphite Part 416 Handle • 418 Tip Part 420 Other Barrel Part I 430 Connector I 500 Ferrule 17 ------- -^ --------- (-** is called the first reading ^ on the back; 1 read it again !? This page applies to the Chinese solid family logo: ί- specifications for public meals)

Claims (1)

6. Scope of patent application 2. Show 3. 6. 7. Special shot No. 90107412 "Please revise the scope of the patent 92.01.14 1. A club handle, which includes a large-end part made of a metal material It is made and has a length greater than 6 and less than or equal to 10 inches, and the diameter at the upper end is between about .385 and about .Chemicals ^; and the barrel is made of composite material on the back , Whose surface is connected to the tip, such as the club handle of the patent application item No.!, Wherein the tip portion has a -lower end ', the diameter of the lower end is selected from the group consisting of about 335 pairs and about · 350 pairs. In the group consisting of, for example, the club shaft of the patent application scope item 2, wherein the tip portion has a wall thickness of about .1255 and about 0175 inches over a complete length along one of the ## points. Another example is the club handle of item 3 of the patent application, wherein the wall thickness of the barrel portion is between about .025 and about 125 inches. For the club handle of item i of the patent application, It further includes: ^ Adhesive as arranged in the patent application range between the tip part and the barrel part The club shaft of item 5, wherein the thickness of the adhesive is between about .003 and about _006 inches. For example, in the club shaft of claim 4, the barrel portion and There is a pin retractably accommodated in the tip portion. For example, the club handle of item 7 of the patent application scope, wherein the length of the tip portion overlapping the pin is greater than · 75 and less than or equal to] .25 Inch. 8. 550105, patent application scope 9 " Please request the patent fan park's item s, which also includes a plastic sleeve arranged between the tip portion and the barrel portion 10. The club phase according to item 8 of the scope of patent application, further comprising: a battery corrosion insulation layer disposed between the tip portion and the barrel portion. 2. The club of item 10 scope of patent application Handle, wherein the insulating layer further includes a plurality of insulating spacers arranged between the tip portion and the barrel portion selected from the group consisting of the following: A glass layer on the outside is positioned near the tip portion. A club shaft includes: a metal material A pointed portion formed; and a barrel-shaped portion formed of a composite material and having a pin extending from its end and retractably accommodated in the pointed portion, the pointed portion The length of the stack of the bolt is about [M Inh. A such as the club handle of item 12 of the patent application, wherein the length of the tip portion is about 8 inches. For example, the club of item 12 of the patent application Shank, wherein the barrel has a club shaft between approximately .025 and .125 inches along the full length of one of the barrel portions, and the two = item cue handle where the tip portion is intact on one of the stings There is a wall thickness between about .1255 and about 0175 inches in length. 16. If the club handle of item 12 of the patent application scope, wherein the tip part 11 12. 14 15 national standards see grid It seems that the 297 public fantasy has a large 550105 Λ BCD. The scope of the patent application has an upper end and a lower end. The straight end of the lower end is selected from the group consisting of approximately .335 inches and approximately .350 inches. 17. The club shank according to item 15 of the patent application, wherein the tip portion has an upper end and a lower end, and the upper end is directly operated between approximately .4 inches and approximately 4 inches. 18. The club shaft according to item 17 of the patent application scope, further comprising: an adhesive disposed between the tip portion and the barrel portion. 19. The club shaft of claim 18, wherein the thickness of the adhesive is between about .003 and about .006 inches. For example, the club handle of the patent application No. 12 further includes a plastic ferrule disposed between the tip portion and the barrel portion. 21 · —a club handle comprising: a metal tip portion having a length greater than 6 and less than 12 inches; and a composite barrel-shaped portion coupled to the tip portion; wherein the tip The portion has a wall thickness between about _0125 and about .0175 inches over a full length along the tip portion. The club handle of claim 2 丨, wherein the tip portion further includes: the first σ ′ position, which has a first wall thickness of about .01 5 and about .01 75 inches; a first Two parts with a second wall thickness (210X297 mm) from about .015 and about · 01 75 inches down to a range of about · 1255 to about 015 inches i Paper size applies medium-20 -550105 \ VI. The scope of patent application AB c D degree; and a third part, which has a third wall thickness between about · 1255 and about .015 inches inch. In the club handle, the first part is about 4 inches in length, and the second part is about 2 inches in length and about 2 inches in length. 2 4 · —A club handle comprising: and a metal tip portion of the third portion, which has a length greater than 6 mm; a graphite barrel portion lightly connected to the tip portion; The agent between the tip portion and the barrel-shaped portion; and a glass insulation layer disposed on the tip portion and the barrel-shaped portion with an adhesion of less than 12 inches. The separation between the glass U2: the tip part is stacked 26. As in the 19th in the scope of the patent application, the shaft thickness is about .0045 inches. 27. The club shaft according to item 17 of the patent application, wherein the length thereof has a moment lower than 0.6 degrees. The adhesive has a tip part in the paper rule (CNJS) μ secret -21.