JP3079118U - Golf club shaft - Google Patents

Abstract

(57) [Problem] To provide a golf club shaft which increases stability and flight distance characteristics when hitting a ball. A golf club shaft includes an upper tube body and a lower tube body. The upper tube body 20 and the lower tube body 40 are connected by a connecting rod. The upper tube body 20 and the lower tube body 40 are formed of materials having different flexibility.
Therefore, at the time of hitting the ball, the stronger upper tube body 20 made of steel can maintain a certain stability while the shaft 10 is being shaken, and the point at which the head hits the ball does not lose much. On the other hand, the lower tube body 40, which has better flexibility, can exhibit a predetermined degree of bending elasticity, and can send the ball farther.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a golf club shaft, and more particularly, to a golf club shaft composed of tubes having different flexibility.

[0002]

[Prior art]

 Golf club shafts have different degrees of flexural elasticity depending on the material. When purchasing a golf club, consumers generally select an appropriate shaft flexibility depending on their individual circumstances. Now, many consumers have opted for a lighter, more flexible fiber reinforced composite shaft that can send the ball farther due to its flexural elasticity when shooting the ball. However, some athlete-level consumers or those who are confident in their strength may choose metal shafts or higher steel shafts, as their strength and skill are sufficient to send the ball far away. You have more precise control over where you hit the ball.

[0003]

[Problems to be solved by the invention]

 This had the following disadvantages. Because the golf club shaft is made of a single material, the higher steel shafts have less flexibility, so the ball can be controlled more precisely where it is shot, but it also helps with the flexibility of sending the ball farther Loses at the same time. However, although the better flexibility can be sent further with the help of flex elasticity, the greater flexibility tends to fall off where the ball falls.

[0004] Accordingly, an object of the present invention is to provide a golf club shaft that increases stability and flight distance characteristics when hitting a ball.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the shaft of the golf club of the present invention is mainly constituted by coaxially joining one upper tube and one lower tube. Since the two tubes have different flexibility, the more flexible tube can exhibit the ball resilience to send the ball farther. Another tube of strong steel exhibits steel properties and stabilizes where the ball falls. The two tubes are connected by one connecting rod, and both ends of the connecting rod are separately fitted into the two tubes. Also, a single washer is interposed between the two tubes to avoid wear and cracks caused by direct contact between the two tubes.

[0006]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. Please look first at Figures 1 to 3. The golf club shaft 10 provided in the first preferred embodiment of the present invention includes the following parts.

There is one upper tubular body 20 having a conical shape, and its length and thickness roughly correspond to 6/7 from the butt end of the shaft of a general golf club. For the material, add metal thread to carbon fiber. That is, a metal thread capable of reinforcing the structure is wound around the surface of the carbon fiber tube.

There is one washer 30 and the material may be aluminum or another metal or engineering plastic, and the outer diameter is the same as the outer diameter of the thinner end face of the upper tube body 20. One end face of the washer 30 contacts the thin end face of the upper tube body 20.

[0009] There is one lower tube body 40 having a conical shape, and the length and the thickness generally correspond to 1/7 of the tip end of the shaft of a general golf club. Since the material is carbon fiber, the flexibility is superior to that of the upper tube body 20. In other words, the steel property of the upper tube body 20 is higher. The outer diameter of the end thicker than the lower tube body 40 is the same as the outer diameter of the washer 30, and the end face of the thicker end comes into contact with another end face of the washer 30. The upper tube body 20 and the lower tube body 40 are coaxial and constitute the outer shape of the shaft of the golf club.

There is one connecting rod 50 that connects two tube bodies 2040. The material may be spring steel or other predetermined steel and flexible metal, the length is approximately 4 cm, and the outer diameter is the center hole 22, 42 of the upper tube body 20 and the lower tube body 40. Corresponding to the hole diameter. A connecting rod 50 is hidden inside the shaft, penetrates the center of the washer 30, and both ends are separately fitted into the central holes 22 and 42 of the two tube bodies 2040, and are firmly connected and fixed with an adhesive. The two tube bodies 2040 are combined into one golf club shaft. In the present embodiment, the raised embossment 52 is provided on the peripheral surface of the connecting rod 50, so that the adhesive is contained and the frictional force is improved. In order to avoid that the air inside the shaft 10 cannot be exhausted by closing the connecting rod 50 when assembling the shaft, one concave groove 54 is provided along the axial direction especially on the side of the connecting rod 50. To make assembly work easier.

[0011] After assembling the above components into a golf club shaft 10 and then performing operations such as polishing and painting to produce a shaft, it is omitted because it is not the focus of the present invention.

When a ball is hit with a golf club having the shaft 10 provided in the present embodiment, the stronger upper tube body 20 made of steel can maintain a certain stability while shaking the shaft 10, The point where the head hits the ball does not lose much. On the other hand, the lower tube body 40, which has better flexibility, can exhibit a predetermined degree of bending elasticity and can send the ball farther. In this embodiment, it is assumed that the material of the upper tube body 20 of the present embodiment is simply higher than that of the conventional shaft. Since the shaft manufactured in the above has no bending section, the hitting distance is not so long as in this embodiment. However, shafts simply made of a more flexible material have no steel sections, so they combine ball control and striking distance to improve overall striking performance.

Further, the metal connecting rod 50 located at the bottom end of the shaft 10 has an effect of lowering the center of gravity of the shaft, thereby increasing the inertia when swinging the golf club and making the hitting distance of the ball farther. .

It is to be noted that, in the above structure, the washer 30 sandwiched between the two tube bodies 2040 becomes bent when the shaft 10 is shaken, and the upper tube body 20 It is used to prevent the lower end of the tube body from cracking because the lower tube body 40 is worn by direct contact. On the other hand, an adhesive may be applied to the joint surface between the washer 30 and the tube body 2040 to strengthen the structure.

The length ratio between the upper tube body 20 and the lower tube body 40 is approximately 6 to 1. However, this proportion is only one better choice, and of course another proportion may be adopted. However, in principle, the junction of the upper and lower tubes should be closer to the lower end.

Please refer to FIG. This is the golf club shaft 60 provided in the second better embodiment of the present invention. The configuration is the same as that of the above embodiment. One washer 63 sandwiched between one upper tube body 61, one lower tube body 62, upper and lower tube body 6162, and one connecting rod 64 for connecting the upper and lower tube body 6162 are provided. Including. The difference from the above embodiment is that the upper tube body 61 uses a material having better flexibility, for example, carbon fiber, and a higher material of the lower tube body 62, for example, uses a metal fiber added to carbon fiber. . When hitting, the flexural elasticity of the upper tube body 61 allows the ball to be shot far away, and the steel property of the lower tube body 62 can accurately maintain the hitting point.

Finally, it is desired that the shaft provided by the present invention is composed of two tubes made of materials having different flexibility. The material of the tube body should be the material that makes the shaft of any golf club. For example, various fiber-reinforced composite materials or metals. The present invention is not limited to the above-described carbon fibers and carbon fibers to which a metal thread is added.

[Brief description of the drawings]

FIG. 1 is a side view showing a shaft of a golf club according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a portion A in FIG.

FIG. 3 is a three-dimensional exploded view corresponding to a portion A in FIG. 1;

FIG. 4 is a side view of a golf club shaft according to another embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shaft 20 Upper tube body 30 Washer 40 Lower tube body 50 Connecting rod 52 Embossed surface 54 Depressed groove 60 Shaft 61 Upper tube body 62 Lower tube body 63 Washer 64 Connecting rod

Claims (7)

[Utility model registration claims] 1. An upper tube body formed in a conical shape, one end surface of which is in contact with a narrow end surface of the upper tube, and an outer diameter of which is substantially the same as an outer diameter of the thinner tube of the upper tube body. A washer, formed in a conical shape, the outer diameter of the thicker one is substantially the same as the outer diameter of the washer, and the overall length is shorter than the upper tube body;
The upper tube is formed of a material having different flexibility from the upper tube, and the thicker end surface is in contact with the other end surface of the washer, and the lower tube is coaxial with the upper tube, and the upper tube and the lower tube. And a connecting rod which is fixed between the upper tube body and the lower tube body at both ends through the center of the washer. . 2. The upper tube body is made of carbon fiber and a metal thread is added to the upper tube body, and the lower tube body is made of carbon fiber and has higher flexibility than the upper tube. Golf club shaft. 3. The upper tube body is made of carbon fiber, and the lower tube body is made of carbon fiber with a metal thread added thereto and has lower flexibility than the upper tube. Golf club shaft. 4. The golf club shaft according to claim 1, wherein a material of the washer is aluminum. 5. The golf club shaft according to claim 1, wherein a material of the connecting rod is spring steel. 6. The golf according to claim 1, wherein an embossing is provided on a peripheral surface of the connecting rod, and the connecting rod is joined to the upper tube body and the lower tube body with an adhesive. Club shaft. 7. The golf club shaft according to claim 1, wherein a groove that is recessed along an axial direction is provided on a side of the connecting rod.