Golf club

Abstract

To provide a golf club capable of changing the combination of a shaft and a head and easily securing the thickness of a hosel part.SOLUTION: A golf club 100 includes a shaft 10, an adapter 20 having a shaft insertion part 21 and a fixing part 22, a head 30 having a hosel part 31 provided with a hosel hole 32 and a through-hole 33, and a coming-off prevention member 40 detachably attached to the through-hole 33. In the fixing portion 22, a second direction D1 orthogonal to a first direction D1 is smaller than the first direction D2 orthogonal to the center shaft of the shaft insertion portion 21. The coming-off prevention member 40 is configured to pass through the through hole 33 from the 31a of the hosel outer wall toward the D2 in the second direction and press the 22a of the cutout portion.

Description

[Technical Field]

[0001] The present invention relates to a golf club. [Background technology]

[0002] Japanese Patent No. 5670568 (Patent Document 1) describes a golf club with a changeable shaft and head combination. The golf club described in this publication includes a shaft, an adapter, and a head. The adapter has a shaft insertion portion at one end and a fixing portion at the other end. The fixing portion of the adapter is located eccentrically with respect to the central axis of the shaft insertion portion. The head has a hosel hole into which the adapter is inserted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5670568 Summary of the Invention [Problem to be solved by the invention]

[0004] In the golf club described in the above publication, the fixing portion of the adapter is located eccentrically with respect to the central axis of the shaft insertion portion, which makes it difficult to ensure the wall thickness of the hosel portion of the head into which the adapter is inserted.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object is to provide a golf club head that allows the combination of shaft and head to be changed and makes it easy to ensure the thickness of the hosel portion. [Means for solving the problem]

[0006] The golf club of the present invention includes: a shaft; an adapter having a shaft; a shaft insertion portion provided with a shaft insertion hole for securing the shaft; a fixing portion aligned with the central axis of the shaft insertion portion and having a notch provided in at least a portion of its peripheral wall; a head having a hosel portion provided with a hosel hole for inserting the adapter and a through hole extending from the outer wall of the hosel to the hosel hole at a position corresponding to the notch in the fixing portion; and a slip-out prevention member detachably attached to the through hole in the hosel portion of the head. The fixing portion is smaller in a second direction perpendicular to a first direction perpendicular to the central axis of the shaft insertion portion than in a first direction perpendicular to the first direction. The slip-out prevention member is configured to pass through the through hole from the outer wall of the hosel to press against the notch in the second direction. [Effects of the Invention]

[0007] According to the golf club of the present invention, the combination of the shaft and the head can be changed, and the thickness of the hosel portion can be easily ensured. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a front view schematically showing a configuration of a golf club according to an embodiment. [Figure 2] 1 is a partially exploded front view showing a schematic configuration of a golf club according to an embodiment; [Figure 3] FIG. 2 is a right side view schematically showing the configuration of the adapter of the golf club according to the embodiment. [Figure 4] FIG. 2 is a rear view showing a schematic configuration of the adapter of the golf club according to the embodiment. [Figure 5] FIG. 2 is a partially enlarged front view of the head of the golf club according to the embodiment. [Figure 6] FIG. 2 is a partially enlarged plan view of the head of the golf club according to the embodiment. [Figure 7] FIG. 7 is a partially enlarged cross-sectional view of part VII of FIG. [Figure 8] FIG. 2 is a right side view schematically showing the configuration of an adapter and a head of the golf club according to the embodiment. [Figure 9] FIG. 10 is a right side view schematically showing the configuration of a modified example of the adapter for the golf club according to the embodiment. [Figure 10] FIG. 10 is a rear view schematically showing the configuration of a modified example of the adapter for the golf club according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Unless otherwise specified, the same or corresponding parts in the following drawings will be designated by the same reference numerals, and the description thereof will not be repeated.

[0010] A golf club 100 according to an embodiment will be described with reference to FIGS.

[0011] 1 and 2, the golf club 100 according to the embodiment includes a shaft 10, an adapter 20, a head 30, and a slip-out prevention member 40. The golf club 100 according to the embodiment also includes a socket 50 and a grip 60.

[0012] The shaft 10 is made of a tubular body formed by laminating fiber-reinforced resin prepregs, a tubular body made of metal, or a tubular body formed by combining these.

[0013] The adapter 20 is attached to one end of the shaft 10. The adapter 20 has a shaft insertion portion 21 and a fixing portion 22.

[0014] The shaft insertion portion 21 is disposed at one end of the adapter 20. A shaft insertion hole 23 for fixing the shaft 10 is provided in the shaft insertion portion 21. The shaft insertion hole 23 is provided in the end face of one end of the adapter 20. The shaft insertion hole 23 extends from the end face of one end of the adapter 20 along the central axis of the adapter 20. One end of the shaft 10 is inserted into the shaft insertion hole 23. One end of the shaft 10 is fixed to the shaft insertion portion 21 with an adhesive or the like while inserted into the shaft insertion hole 23.

[0015] The fixed portion 22 is disposed at the other end of the adapter 20. The fixed portion 22 is provided so as to coincide with the central axis C1 of the shaft insertion portion 21. The fixed portion 22 has a notch 22a provided in at least a part of the peripheral wall portion.

[0016] The adapter 20 can be made of metal materials such as stainless steel, titanium alloy, aluminum alloy, engineering plastic, fiber-reinforced resin, etc., but it is more preferable to use a metal material with excellent fatigue properties. The shaft insertion portion 21 and the fixing portion 22 are preferably made by integral molding.

[0017] The head 30 is attached to the adapter 20. The head 30 has a hosel portion 31. The hosel portion 31 is provided with a hosel hole 32 into which the adapter 20 is inserted. When the adapter 20 is inserted into the hosel hole 32, the hosel portion 31 is provided with a through hole 33 extending from the hosel outer wall 31a to the hosel hole 32 at a position corresponding to the notch 22a of the fixing portion 22. The through hole 33 is provided on the heel side of the hosel portion 31 in the toe-heel direction. A screw groove is formed in the through hole 33. The head 30 has a face portion 34. The face portion 34 is provided with a plurality of score lines 34a.

[0018] The head 30 is an iron type. The head 30 is formed by casting or forging from a metal material such as an iron-based alloy such as carbon steel or stainless steel, or titanium or a titanium alloy. The head 30 may be made of a single material or may be made by joining multiple materials. It is desirable that the head 30 and the adapter 20 be made of materials having the same or approximately the same specific gravity.

[0019] The anti-slip member 40 is detachably attached to the through-hole 33 of the hosel portion 31 of the head 30. The anti-slip member 40 has a screw thread. By tightening the anti-slip member 40 in the through-hole 33, the adapter 20 is prevented from coming off the hosel hole 32. Furthermore, by loosening the anti-slip member 40 from the through-hole 33, the adapter 20 can be removed from the hosel hole 32. The anti-slip member 40 is a stainless steel screw.

[0020] The socket 50 is attached to the shaft 10. The socket 50 is disposed adjacent to the adapter 20. The socket 50 is a resin socket.

[0021] The grip 60 is attached to the other end of the shaft 10. The main material of the grip 60 is natural rubber, synthetic rubber, or the like.

[0022] As shown in Figures 3 and 4, the shaft insertion portion 21 has a first portion 21a and a second portion 21b. The first portion 21a is disposed at one end of the adapter 20. The second portion 21b is adjacent to the first portion 21a. The diameter of the second portion 21b is smaller than the diameter of the first portion 21a. The shaft insertion hole 23 is provided through the first portion 21a and extends partway into the second portion 21b.

[0023] The fixed portion 22 has a smaller width in a second direction D2, which is perpendicular to the first direction D1 and also perpendicular to the central axis C1, than in a first direction D1, which is perpendicular to the central axis C1 of the shaft insertion portion 21. The second direction D2 is perpendicular to both the first direction D1 and the central axis C1 of the shaft insertion portion 21. The fixed portion 22 has a substantially oval cylindrical shape formed by extending an oval having a major axis in the first direction D1 into a columnar shape, and has a notch 22a, which will be described later, on its side. The contour shape of the fixed portion 22 projected in the direction of extension of the central axis C1 is an oval shape with its longitudinal direction in the first direction D1 and a straight portion in the longitudinal direction.

[0024] The notches 22a are provided on both sides of the fixed portion 22 in the second direction D2. The notches 22a provided on both sides of the fixed portion 22 are configured symmetrically with respect to the center of the fixed portion 22.

[0025] The cutout portion 22a includes a parallel portion 22a1 and a tapered portion 22a2. The parallel portion 22a1 is disposed on the base side of the fixed portion 22. The tapered portion 22a2 is connected to the parallel portion 22a1 and disposed on the tip side of the fixed portion 22. The parallel portion 22a1 is configured to be parallel to the central axis C1 of the shaft insertion portion 21. The tapered portion 22a2 is configured so that its thickness increases continuously from the parallel portion 22a1.

[0026] The fixed portion 22 includes a root portion 22b disposed at the base of the fixed portion 22, a tip portion 22c disposed at the tip of the fixed portion 22, and a central portion 22d disposed between the root portion 22b and the tip portion 22c. The notch 22a is provided in the central portion 22d. The tip portion 22c is smaller than the central portion 22d in the first direction D1.

[0027] The shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined with respect to the central axis C1 of the shaft insertion portion 21. In the present embodiment, the shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined in the second direction D2 with respect to the central axis C1 of the shaft insertion portion 21. Specifically, the shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined at an angle of 1 degree in the second direction D2 with respect to the central axis C1 of the shaft insertion portion 21.

[0028] As shown in Figures 5 and 6, the hosel hole 32 includes a first hole portion 32a and a second hole portion 32b. The first hole portion 32a is configured so that the second portion 21b of the shaft insertion portion 21 is inserted into it. The first hole portion 32a is configured in a circular shape. The second hole portion 32b is configured so that the fixing portion 22 is inserted into it. The second hole portion 32b has a longitudinal direction in the face-to-back direction and is an elliptical shape with a straight portion in the longitudinal direction. The longitudinal direction of the second hole portion 32b corresponds to the first direction D1, and the short side direction of the second hole portion 32b corresponds to the second direction D2.

[0029] As shown in FIGS. 7 and 8 , the anti-slip member 40 is attached to the through-hole 33 of the hosel portion 31 of the head 30. The anti-slip member 40 is configured to pass through the through-hole 33 from the hosel outer wall 31a in the second direction D2 and press against the notch 22a. By inserting a tool such as a wrench into the recess 40a provided at one end of the anti-slip member 40 and rotating the tool, the anti-slip member 40 can be rotated together with the tool. This allows the threads of the anti-slip member 40 to thread into the thread grooves of the through-hole 33, thereby enabling the anti-slip member 40 to be attached to and detached from the hosel portion 31. To ensure the number of thread taps, the area surrounding the through-hole 33 of the hosel portion 31 is raised.

[0030] 9 and 10, a modified example of the golf club 100 according to the embodiment will be described.

[0031] In the modified example of the golf club 100 according to the embodiment, the shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined in a first direction D1 with respect to the central axis C1 of the shaft insertion portion 21. Specifically, the shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined at an angle of 1 degree in the first direction D1 with respect to the central axis C1 of the shaft insertion portion 21. In other words, in the modified example of the golf club 100 according to the embodiment, the direction in which the shaft insertion hole central axis C2 is inclined with respect to the central axis C1 of the shaft insertion portion 21 is shifted by 90 degrees compared to the golf club 100 according to the embodiment.

[0032] Next, the effects of the golf club 100 according to the embodiment will be described.

[0033] In the golf club 100 according to the embodiment, the slip-out prevention member 40 is detachably attached to the through-hole 33 of the hosel portion 31 of the head 30. Therefore, by loosening the slip-out prevention member 40 from the through-hole 33 of the hosel portion 31, the head 30, the adapter 20, and the shaft 10 attached to the adapter 20 can be attached to or detached from the head 30. Therefore, the combination of the shaft 10 and the head 30 can be changed.

[0034] The anti-slip member 40 is configured to press the cutout portion 22a in the second direction D2 from the hosel outer wall 31a through the through hole 33. Because the fixing portion 22 is smaller in the second direction D2 than in the first direction D1, the thickness of the hosel portion 31 can be made thicker in the second direction D2 than in the first direction D1. This makes it easy to ensure the thickness of the hosel portion 31.

[0035] Furthermore, a golfer can hit a ball with a golf club 100 assembled with the head 30 and shaft 10 of his / her choice to check the performance, and if it does not suit him / her, he / she can exchange it for another head 30 or shaft 10 and check the performance, thereby enabling a highly accurate custom fitting system.

[0036] Furthermore, the fixed portion 22 is smaller in the second direction D2 than in the first direction D1. Therefore, the fixed portion 22 is not cylindrical, and therefore, the fixed portion 22 can be prevented from rotating within the hosel hole 32.

[0037] According to the golf club 100 according to the embodiment, the notches 22a are provided on both sides of the fixing portion 22 in the second direction D2. Therefore, the adapter 20 can be fitted to the head 30 in accordance with both sides of the fixing portion 22. This makes it possible to fit the adapter 20 to the head 30 only in the two desired directions.

[0038] In the golf club 100 according to the embodiment, the parallel portion 22a1 of the cutout 22a is disposed on the base side of the fixed portion 22. The tapered portion 22a2 is configured so that its thickness increases continuously from the parallel portion 22a1. Therefore, compared to a case where the cutout 22a has only the tapered portion 22a2 and no parallel portion 22a1, the parallel portion 22a1 can prevent the base of the tapered portion 22a2 from becoming too thin and becoming insufficient in strength. Therefore, the parallel portion 22a1 ensures the strength of the cutout 22a, and the tapered portion 22a2 can prevent the fixed portion 22 from coming loose.

[0039] According to the golf club 100 according to the embodiment, the length of the tip portion 22c in the first direction D1 is shorter than the length of the central portion 22d. This allows the thickness of the hosel portion 31 at the portion where the tip portion 22c is located to be further increased. This allows the thickness of the hosel portion 31 to be further ensured.

[0040] According to the golf club 100 according to the embodiment, the shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined with respect to the central axis C1 of the shaft insertion portion 21. This makes it possible to adjust the lie angle or loft angle of the golf club 100.

[0041] According to the golf club 100 of the embodiment, the shaft insertion hole central axis C2 of the shaft insertion hole 23 is inclined in the first direction D1 or the second direction D2 with respect to the central axis C1 of the shaft insertion portion 21. Therefore, in the golf club 100 for irons, the lie angle can be adjusted by inclining the shaft insertion hole central axis C2 of the shaft insertion hole 23 in the second direction D2 with respect to the central axis C1 of the shaft insertion portion 21. In a modified example of the golf club 100 of the embodiment, the loft angle can be adjusted by inclining the shaft insertion hole central axis C2 of the shaft insertion hole 23 in the first direction D1 with respect to the central axis C1 of the shaft insertion portion 21.

[0042] When the golf club 100 according to the embodiment is used as a golf club for custom fitting, it is desirable to make the center of gravity and moment of inertia of the head 30 closer to those of a production head corresponding to the head 30 in order to improve the accuracy of the fitting tool. The golf club 100 according to the embodiment facilitates ensuring the thickness of the hosel portion 31. This allows the adapter 20 to be inserted deeply into the hosel portion 31. As a result, the dimension from the sole of the head 30 to the top end of the adapter 20 can be made identical to that of a production head corresponding to the head 30. This allows the center of gravity and moment of inertia of the head 30 to be closer to those of a production head corresponding to the head 30. Furthermore, the flex of the shaft 10 can also be made closer to those of the production head. This improves the accuracy of the fitting tool.

[0043] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0044] 10 shaft, 20 adapter, 21 shaft insertion portion, 22 fixing portion, 22a notch portion, 22a1 parallel portion, 22a2 tapered portion, 22b root portion, 22c tip portion, 22d central portion, 23 shaft insertion hole, 30 head, 31 hosel portion, 31a hosel outer wall, 32 hosel hole, 33 through hole, 40 prevention member, 50 socket, 60 grip, 100 golf club, D1 first direction, D2 second direction.

Claims

1. A shaft and an adapter having a shaft insertion portion provided with a shaft insertion hole for fastening the shaft, and a fixing portion provided to coincide with a central axis of the shaft insertion portion and having a notch provided in at least a part of a peripheral wall surface; a head having a hosel portion provided with a hosel hole into which the adapter is inserted and a through hole extending from an outer wall of the hosel to the hosel hole at a position corresponding to the notch in the fixing portion; a slip-out prevention member detachably attached to the through hole of the hosel portion of the head, the fixing portion is smaller in a second direction perpendicular to the central axis of the shaft insertion portion than in a first direction perpendicular to the first direction, The anti-slip member is configured to press the cutout portion in the second direction from the outer wall of the hosel through the through hole.

2. The golf club according to claim 1 , wherein the notch is provided on both sides of the fixing portion in the second direction.

3. the notch includes a parallel portion disposed on a base side of the fixed portion, and a tapered portion connected to the parallel portion and disposed on a tip side of the fixed portion, the parallel portion is configured to be parallel to the central axis of the shaft insertion portion, 3. The golf club according to claim 1, wherein the tapered portion is configured so that the thickness increases continuously from the parallel portion.

4. the fixing portion includes a root portion disposed at a root of the fixing portion, a tip portion disposed at a tip of the fixing portion, and a central portion disposed between the root portion and the tip portion, the notch is provided in the central portion, The golf club according to claim 1 , wherein the tip portion is smaller than the central portion in the first direction.

5. 3. The golf club according to claim 1, wherein a central axis of the shaft insertion hole is inclined with respect to the central axis of the shaft insertion portion.

6. The golf club according to claim 5 , wherein the central axis of the shaft insertion hole is inclined in the first direction or the second direction with respect to the central axis of the shaft insertion portion.

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