JP2006158477A - Socket and golf club using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a socket with more excellent strength and workability than a conventional socket and with improved durability, and a golf club using the same. <P>SOLUTION: The socket is for fixing a golf club shaft to a golf club head. The socket comprises a cylindrical base part and a flange part formed at one end of the base part. A through hole piercing through the base part and the flange part is formed, and at least two grooves or notches extending from the other end to the one end are formed in the base part. The length of the base part is at least 5 mm and the thickness of the base part is at least 0.2 mm. When the grooves are formed, the depth of each groove is at least 0.2 mm, and the length of the groove or notch is 10-100% of the length of the base part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a socket having a base portion that is inserted into an opening of a hosel portion, and a golf club in which a golf club shaft is fixed to a golf club head via the socket. Particularly, the workability is good and the strength is improved. And a socket having excellent durability and a golf club using the socket.

  Conventionally, golf clubs have a problem that stress concentrates on the contact portion between the hosel portion and the golf club shaft, and the golf club shaft breaks at this contact portion when repeatedly used. Various golf clubs having improved golf club shaft foldability have been proposed.

  FIG. 10 is an exploded perspective view showing an example of a conventional golf club in which the bendability of the golf club shaft is improved.

As shown in FIG. 10, the golf club G has a golf club head 40, a golf club shaft 120, and a socket 100.
The golf club head 40 has a body 42, a face surface 44 and a hosel part 50 provided on the body 42. An opening 52 is formed in the hosel part 50.
The socket 100 has a truncated cone shape, and an opening 102 is formed at the center thereof.
In assembling the golf club G, the front end 120a of the golf club shaft 120 is inserted into the opening 102 of the socket 100. In this state, the front end 120a is inserted into the opening 52, and the golf club shaft 120 is inserted into the golf club head. 40 is fixed. Therefore, the socket 100 can relieve stress concentration at the contact portion between the hosel portion 50 and the golf club shaft 120.

FIGS. 11A and 11B are schematic cross-sectional views showing, in the order of steps, a conventional method for manufacturing a golf club in which the bendability of the golf club shaft shown in FIG. 10 is improved. In FIGS. 11A and 11B, the golf club head 40 shown in FIG. 10 is not shown.
First, as shown in FIG. 11A, the leading end 120 a of the golf club shaft 120 is inserted into the opening 102 of the socket 100.
Next, as shown in FIG. 11 (b), an adhesive is applied to the tip portion 120 a protruding from the socket 100, and the tip portion 120 a is inserted through the opening 52 to connect the hosel portion 50 and the golf club shaft 120. Glue. In this way, the golf club is assembled.

  However, after the golf club shaft 120 is inserted through the opening 102 of the socket 100, the tip 120a is inserted into an opening 52 that is generally formed larger in diameter than the outer diameter of the golf club shaft 120 and assembled. Although the assembly workability is good, the socket 100 is separated from the hosel part 50 by repeated use. That is, there is a problem that the socket 100 is lifted. If the socket 100 is lifted, stress concentrates on the contact portion between the hosel portion 50 and the golf club shaft 120, and the golf club is likely to be damaged, and the durability of the golf club is lowered.

  In order to prevent the above-described lifting of the socket, various sockets having a base portion inserted into the opening of the hosel have been proposed (see, for example, Patent Documents 1 to 8).

  Patent Document 1 discloses a socket in which a ring-shaped convex portion is provided on a peripheral surface of a base portion. Patent Document 2 discloses a socket in which a groove extending linearly in the golf club shaft insertion direction is formed in the base. Patent Document 2 also discloses a socket in which a groove is formed in a spiral shape. Furthermore, Patent Document 3 discloses a socket in which a plurality of grooves are provided on the peripheral surface of the base. Patent Document 4 discloses a socket in which a concave portion is formed in the circumferential direction on the peripheral surface of the base portion.

Patent Document 5 discloses a socket in which a concave portion extending in the golf club shaft insertion direction is formed on the peripheral surface of the base portion, and a convex portion that fits into the concave portion of the socket is formed inside the opening of the hosel. ing.
Further, Patent Document 6 discloses a socket in which a convex portion or a flat portion extending in the golf club shaft insertion direction is formed on the peripheral surface of the base portion, and a concave portion or a contact with the convex portion or the flat portion of the socket is disclosed. A flat surface is formed inside the opening of the hosel.
Further, Patent Document 7 discloses a socket having a cylindrical base.
Patent Document 8 discloses a golf club in which an internal thread is formed inside an opening of a hosel into which a socket having a cylindrical base is inserted.

Here, FIGS. 12A and 12B are schematic views showing a method for assembling a golf club using a socket having a base. In FIGS. 12A and 12B, the golf club head 40 shown in FIG. 10 is not shown.
A socket 110 shown in FIGS. 12A and 12B has a base 114 inserted into the recess (opening) 54 of the hosel part 50 and a flange part 112 formed at one end of the base 114. A through hole 116 penetrating the flange portion 112 and the base portion 114 is formed. The flange portion 112 corresponds to the socket 100 of the prior art 1, has a larger diameter than the base portion 112, and protrudes from the hosel portion 50.

  As shown in FIG. 12 (a), the opening 52 of the hosel part 50 is formed with a recess 54 that is aligned with the base 114. First, the base 114 is fixed to the recess 54 with an adhesive or the like. As shown in FIG. 12B, the golf club shaft 120 is inserted into the through hole 116. In this way, the golf club is manufactured.

  In the golf club manufactured in this way, the base 114 is inserted into the recess 54 to prevent the socket 110 from coming off, and even if the flange 112 is separated from the hosel 50, the base 114 becomes a stress relieving material, The stress concentration is relaxed, and the foldability of the golf club shaft 120 is improved.

JP-A-8-117364 JP-A-9-66124 JP-A-12-42146 Japanese Utility Model Publication No. 4-30561 Japanese Utility Model Publication No. 6-66725 JP-A-9-84904 JP-A-10-295856 JP-A-12-140162

However, golf clubs using sockets having a base, including the sockets disclosed in Patent Documents 1 to 8, have the following problems. FIG. 13 is a schematic view showing another method for manufacturing a golf club using a socket having a conventional base.
As shown in FIG. 13, after inserting the golf club shaft 120 into the socket 110 in advance, when inserting the base portion 114 into the recess 54 of the hosel portion 50, the golf club head (not shown) is fixed at a predetermined position, It is necessary to prevent it from moving, and the assembly work becomes complicated. In addition, since the fit between the through-hole 116 of the socket 110 and the golf club shaft 120 is an interference fit, in a state where the socket 110 is fixed to the hosel portion 50, it is difficult to assemble and workability is reduced. As described above, the assembly using the socket having the base has a problem that workability is lowered. Further, in golf clubs assembled using a socket having a base, some golf club shafts have poor foldability.

  An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide a socket having excellent strength and workability as compared with the prior art and having improved durability and a golf club using the same. is there.

  In order to achieve the above object, a first aspect of the present invention is a socket for fixing a golf club shaft to a golf club head, a cylindrical base portion and a flange portion formed at one end of the base portion. A through hole penetrating the base portion and the flange portion, and at least two grooves or notches extending from the other end toward the one end are formed in the base portion. Is 5 mm or more, the thickness of the base is 0.2 mm or more, and when the groove is formed, the depth of the groove is 0.2 mm or more, and the groove and the notch are The socket is characterized in that the length is 10% to 100% of the length of the base portion.

  In the present invention, it is preferable that the base is provided with a protrusion protruding radially from the central axis of the through hole on the outer peripheral surface.

  According to a second aspect of the present invention, in order to fix the golf club shaft, a base portion that is inserted into an opening portion of a hosel portion provided in a golf club head, and one end of the base portion that protrudes from the opening portion A socket having a flange portion, a through hole penetrating the base portion and the flange portion, wherein the golf club shaft is inserted into the through hole, and an outer peripheral surface of the base portion is formed by the hosel The socket is characterized by being formed so as to have a clearance of 0.2 to 0.5 mm with respect to the inner peripheral surface of the opening of the part.

  According to a third aspect of the present invention, a golf club head provided with a hosel portion for fixing a golf club shaft, a base portion inserted into the opening portion of the hosel portion, and one end of the base portion are formed from the opening portion. A golf club having a projecting flange portion, having a through hole penetrating the base portion and the flange portion, and having a socket through which the golf club shaft is inserted, wherein the socket is The base has at least two grooves or notches extending from the other end toward the one end, the base has a length of 5 mm or more, and the base has a thickness of 0.2 mm or more. And when the groove is formed in the base, the depth of the groove is 0.2 mm or more, and the length of the groove and the notch is the length of the base. It is to provide a golf club which is a 10% to 100% of.

  In the socket, it is preferable that a protrusion protruding radially from the central axis of the through hole is provided on the outer peripheral surface of the base portion. Moreover, it is preferable that the said hosel part is formed with the recessed part or groove | channel in the inner peripheral surface of the said opening part in the position which aligns with the said protrusion at least.

  According to a fourth aspect of the present invention, there is provided a golf club head provided with a hosel portion for fixing a golf club shaft, a base portion inserted into the opening portion of the hosel portion, and one end of the base portion formed from the opening portion. A golf club having a projecting flange portion, having a through hole penetrating the base portion and the flange portion, and having a socket through which the golf club shaft is inserted, wherein the hosel portion The present invention provides a golf club characterized in that there is a gap of 0.2 to 0.5 mm between the inner peripheral surface of the opening and the outer peripheral surface of the base portion.

  In the above-described third and fourth aspects of the invention, at least one or more first holes having a diameter of 1 mm or more formed in the hosel part at a position 15 mm or more away from the end face of the opening, and the golf When the club shaft is fixed, it is preferable that the golf club shaft has at least one second hole having a diameter of 1 mm or more formed at least one at a position separated from the end face of the opening by 10 mm or more.

  According to a fifth aspect of the present invention, there is provided a golf club head provided with a hosel portion for fixing a golf club shaft, a base portion inserted into the opening portion of the hosel portion, and one end of the base portion formed from the opening portion. A golf club having a projecting flange portion, and having a through hole penetrating the base portion and the flange portion, and a socket through which the golf club shaft is inserted, the golf club of the opening The length in the insertion direction of the club shaft is longer than the length in the insertion direction of the base, and the hosel part has at least one or more at a position away from the end surface of the opening in the insertion direction. The golf club is characterized in that a first hole having a diameter of 1 mm or more is formed.

  According to a sixth aspect of the present invention, there is provided a golf club head provided with a hosel portion for fixing a golf club shaft, a base portion inserted into the opening portion of the hosel portion, and one end of the base portion formed from the opening portion. A golf club having a projecting flange portion, and having a through hole penetrating the base portion and the flange portion, and a socket through which the golf club shaft is inserted, the golf club of the opening The length of the club shaft in the insertion direction is longer than the length of the base in the insertion direction, and when the golf club shaft is fixed to the hosel part, the golf club shaft is fixed from the end surface of the opening. At least one second hole having a diameter of 1 mm or more is formed at a position distant from the length of the base in the insertion direction. It is intended to provide a golf club characterized by being.

According to the socket of the present invention, by defining the dimensions of each part of the socket, it is possible to obtain a golf club having higher strength and durability than the conventional one and excellent assembly workability.
Also, according to the golf club of the present invention, by defining the dimensions of each part of the socket, it is possible to increase the strength and durability compared to the conventional one, and further, the assembly workability is excellent and the productivity is excellent. It can also be.

Hereinafter, a socket of the present invention and a golf club using the same will be described in detail based on preferred embodiments shown in the accompanying drawings.
FIG. 1A is a side view showing a socket used in the golf club according to the first embodiment of the present invention, and FIG. 1B is a sectional view taken along line AA in FIG.
As shown in FIGS. 1A and 1B, the socket 10 includes a flange portion 12 having a truncated cone shape, and a base portion 14 formed at one end of the flange portion 12 and formed into a columnar shape. The outer periphery of the flange portion 12 is larger than that of the base portion 14. The base portion 14 has, for example, four notches 18 extending at a predetermined length from the other end toward one end at equal intervals. Thereby, the base 14 is divided into four strips 16. A through hole 20 is formed in the flange portion 12 and the base portion 14 so as to penetrate in a direction parallel to the direction in which the notch portion 18 extends. A golf club shaft (see FIG. 12B) is inserted into the through hole 20. The

  With this configuration, in the present embodiment, when the socket 10 is fixed to the hosel part 50 (see FIG. 10) with an adhesive, excess adhesive flows into the notch 18, that is, the adhesive is easily removed. For this reason, as shown in FIG. 13, the golf club shaft 120 can be bonded to the hosel portion 50 in a state where the golf club shaft 120 is inserted through the socket 10 in advance. That is, assembly workability is improved.

In the present invention, the length L of the through hole 20 of the base portion 14 in the central axis direction is 5 mm or more. Preferably, the length L of the base portion 14 is 5 to 20 mm.
Moreover, the thickness t of the base 14 (strip strip 16) is 0.2 mm or more. Preferably, the thickness t of the base portion 14 is 0.2 to 1 mm.
When the length L of the base 14 is 5 mm or more and the wall thickness t is 0.2 mm or more, sufficient strength and good assembly workability can be obtained.
On the other hand, when the length L of the base portion 14 is less than 5 mm and the wall thickness t is less than 0.2 mm, the assembled golf club cannot obtain sufficient strength as will be described later. Moreover, when the length L of the base 14 exceeds 20 mm and the wall thickness t exceeds 1.0 mm, the assembly workability may be reduced.
In the present invention, by setting the length L of the base portion 14 and the wall thickness t within the above-described preferable ranges, sufficient strength can be stably obtained as described later, and the assembly workability is also good. . Thus, the present invention is characterized by finding the length of the base and the thickness thereof having sufficient strength and assembly workability.

Furthermore, the notch part 18 should just be provided with the width | variety of 1.0 mm or more and at least 2 pieces. When the width of the notch 18 is less than 1.0 mm and the number is one, the adhesive is not sufficiently removed and workability is deteriorated.
Further, the length of the notch 18 is 10% to 100% of the length L of the base 14. By setting the length of the notch 18 to 10% to 100% of the length L of the base 14, workability is improved.

FIG. 2 is a cross-sectional view showing a modification of the socket according to the first embodiment of the present invention. The cross-sectional view shown in FIG. 2 corresponds to the cross section taken along line AA shown in FIG.
As shown in FIG. 2, the socket 10a of the present modification is different from the first embodiment in that a groove 24 is provided in a cylindrical base 22 instead of the notch 18, Since the configuration other than is the same as the configuration of the socket 10 of the first embodiment, a detailed description thereof will be omitted. In addition, the dimension of each part of the socket 10a in this modification and the reason for the numerical limitation are the same as those in the first embodiment.
In this modification, the number of the groove parts 24 should just be provided at least two. The depth D of the groove 24 is 0.2 mm or more. If the depth D of the groove portion 24 is less than 0.2 mm, the adhesive is not easily removed and sufficient workability cannot be obtained. Also in this modification, the same effect as that of the first embodiment can be obtained.
Further, the length of the groove portion 24 is set to 10% to 100% of the length L of the base portion 14. The workability is improved by setting the length of the groove portion 24 to 10% to 100% of the length L of the base portion 14.

Next, a second embodiment of the present invention will be described. FIG. 3A is a side view showing a socket used for a golf club according to a second embodiment of the present invention, and FIG. 3B is a sectional view taken along line BB in FIG.
Compared with the socket 10 of the first embodiment, the socket 10b of the present embodiment is radially outward from the axis (center axis) of the through hole 20 on the outer side of the end portion of the base portion 14 opposite to the flange portion 12. Since the nail | claw part 17 (protrusion) which protrudes is provided, and the structure of other than that is the same as that of the socket 10 of 1st Embodiment, the detailed description is abbreviate | omitted. The reason for limiting the numerical values of the length L of the base portion 14, the thickness t of the strip 16, and the width and number of the notches 18 in the present embodiment is the same as in the first embodiment, and the detailed description thereof will be omitted. Description is omitted.

In the present embodiment, the anchor effect produced by providing the claw portion 17 improves the adhesive force between the hosel portion 50 and the socket 10b, and the socket 10b is more difficult to come out compared to the first embodiment. Further, the durability (socket floating) of the golf club is further improved.
Further, in the present embodiment, by forming a recess or groove at a position that matches the claw portion 17 on the inner peripheral surface of the recess 54 of the hosel portion 50, or by roughening the inner peripheral surface of the recess 54, Furthermore, the anchor effect can be enhanced. Thereby, the durability of the golf club can be further improved.
Note that the position where the claw portion 17 is provided in the extending direction is not particularly limited as long as it is the outer peripheral surface of the strip 16.

FIG. 4 is a cross-sectional view showing a modification of the socket according to the second embodiment of the present invention. The cross-sectional view shown in FIG. 4 corresponds to the cross section taken along line BB shown in FIG.
As shown in FIG. 4, the socket 10 c of this modification is different from the socket 10 b of the second embodiment in that a groove 24 is provided in a cylindrical base 22 instead of the notch 18. Unlike the second embodiment, the other configurations are the same as those in the second embodiment, and detailed description thereof is omitted. In the present modification, the number of the groove portions 24 may be at least two. The depth D of the groove part 24 is 0.2 mm or more. If the depth D of the groove portion 24 is less than 0.2 mm, the adhesive is not easily removed and sufficient workability cannot be obtained.
The other numerical limitation reasons are the same as those of the socket 10b of the second embodiment, and detailed description thereof will be omitted. In this modification, the same effect as that of the second embodiment can be obtained.

Next, a third embodiment of the present invention will be described. FIG. 5A is a partial cross-sectional view of a main part of a golf club according to a third embodiment of the present invention. FIGS. 5B to 5D are first to third views of the third embodiment. It is a fragmentary sectional view of the principal part which shows a modification.
The socket 11 used for the golf club of the present embodiment has a flange portion 12 and a cylindrical base portion 30, and compared with the first embodiment, the outer peripheral surface of the base portion 30 and the hosel portion 50. The outer diameter of the base 30 and the inner diameter of the concave portion 54 are adjusted so that a gap 56 is formed between the inner peripheral surface of the concave portion 54 and the gap 56 is filled with an adhesive 57. Since the other configuration is the same as that of the first embodiment, its detailed description is omitted.
In the present invention, the gap d of the gap 56 is 0.2 to 0.5 mm. When the gap d of the gap 56 is less than 0.2 mm, the gap 56 is narrow, the assembly becomes complicated, and sufficient workability cannot be obtained. On the other hand, if the distance d of the gap 56 exceeds 0.5 mm, sufficient durability cannot be obtained and the socket may be lifted.

  In the present embodiment, by providing the gap 56 between the outer peripheral surface of the base 30 and the inner peripheral surface of the recess 54, the socket 11 can be easily attached even after the socket 11 is attached to the golf club shaft 120 in advance. Can be attached to the hosel part 50. Thus, the golf club of this embodiment has both strength and durability and ease of assembly.

  Next, a first modification of the present embodiment will be described. As shown in FIG. 5B, the socket 11a of the first modified example is a joint between the base 30 and the flange 12 and the flange of the base 30 compared to the socket 11 of the third embodiment. The chamfered portions 32 and 34 are formed at the end opposite to 12 and the end 54a of the concave portion 54 is formed in a shape that matches the chamfered portion 32. Other configurations are as follows. Since it is the same as that of 3rd Embodiment, the detailed description is abbreviate | omitted.

  In this modification, the same effects as those of the third embodiment can be obtained, and the socket 11a is inserted into the recess 54 by forming the chamfer 34 at the end of the base 14 on the recess 54 side. As a result, the assembly workability is further improved.

  Next, a second modification of the present embodiment will be described. As shown in FIG.5 (c), compared with the socket 11 of 3rd Embodiment, the socket 11b of a 2nd modification is a junction part of the base 30a and the flange part 12, and the flange part of the base 30a. Chamfered portions 32a and 36 are formed at the end opposite to 12, and the thickness of the base portion 30a increases as it goes from the chamfered portion 32 to the opposite end. Since this configuration is the same as that of the third embodiment, a detailed description thereof will be omitted.

  The base 30a in the present modification is flared from the end of the flange 12 toward the opposite end. Further, the distance d in the present modification is the distance between the outermost diameter portion of the base portion 30 a and the inner peripheral surface of the recess 54. Also in this modification, the same effect as that of the third embodiment can be obtained. Further, by increasing the outer diameter of the end portion on the concave portion 54 side of the shape of the base portion 30a and inclining the edge with respect to the extending direction of the golf club shaft 120, the anchoring force is increased and the socket 11b is more difficult to be removed. Become. For this reason, the bendability of the golf club shaft 120 due to the removal of the socket 11b is further improved, and the durability of the golf club is further improved.

  Next, a third modification of the present embodiment will be described. As shown in FIG.5 (d), the socket 11c of the 3rd modification is compared with the socket 11 of 3rd Embodiment, and the junction part of the base 30b and the flange part 12, and the flange part of the base 30b The chamfered portions 32 and 36 are formed at the end opposite to 12 and the base portion 30b is further formed with a recess 38 along the outer peripheral surface thereof. Since the third embodiment is the same as the third embodiment, detailed description thereof is omitted. The distance d in this modification is the distance between the outermost diameter portion of the base portion 30 b and the inner peripheral surface of the recess 54. Also in this modification, the same effect as that of the third embodiment can be obtained. In this modification, the anchoring force of the socket 11c can be improved by forming the recess 38 in the base 30b. For this reason, also in this modified example, the bendability of the golf club shaft 120 due to the removal of the socket 11b is further improved, and the durability of the golf club is further improved.

Next, a fourth embodiment of the present invention will be described. FIG. 6 is a partial cross-sectional view showing the main part of a golf club according to the fourth embodiment of the present invention. In FIG. 6, the golf club head 40 is not shown.
As shown in FIG. 6, in the golf club of the present embodiment, the golf club shaft 120 is fixed to the hosel portion 50 via the socket 13. The socket 13 has a cylindrical base portion 31 and a flange portion 12 whose outer periphery is larger in diameter than the base portion 31, and a through hole 20 is formed through the flange portion 12 and the base portion 31. The golf club shaft 120 is inserted through the through hole 20.

The hosel part 50 is formed with a recess 54 into which the base 31 is inserted. The inner diameter of the recess 54 is substantially the same as the outer diameter of the base 31. The length of the recess 54 in the insertion direction through which the golf club shaft 120 is inserted is longer than the length of the base portion 31 in the insertion direction.
In the hosel part 50, for example, one through hole 58 (first hole) communicating with the recess 54 is formed at a position away from the upper end surface 54b of the base 31 in the insertion direction. In this manner, the through hole 58 communicating with the recess 54 is formed at a position that does not overlap the base 31.
In the present embodiment, the through hole 58 is provided in the hosel portion 50 at a position that does not overlap the base portion 31, so that the adhesive can be easily removed. As a result, it is possible to obtain a golf club having good assembling workability and sufficient strength and durability.

  In the present embodiment, when the length L of the base 31 is 5 mm or more, the through hole 58 has a diameter of 1 mm or more, and the distance H between the center position and the upper end surface 54b of the hosel part 50 is 15 mm or more. Preferably there is. Thereby, the effect of this embodiment can be acquired. On the other hand, if the diameter of the through hole 58 is less than 1 mm and the distance H is less than 15 mm, the adhesive may not be sufficiently removed, and good assembly workability may not be obtained. The number of through holes 58 is not particularly limited, and the above-described effects can be obtained as long as at least one through hole 58 is formed at a position satisfying the above-described distance H.

Next, a fifth embodiment of the present invention will be described. FIG. 7 is a partial cross-sectional view showing the main part of a golf club according to the fifth embodiment of the present invention. In FIG. 7, the golf club head 40 is not shown.
As shown in FIG. 7, in the golf club of the present embodiment, the through hole 58 is not formed in the hosel portion 50 as compared with the fourth embodiment, and the golf club shaft 120 is attached to the golf club shaft 120. A through hole (second hole) 122 is formed at a position away from the upper end surface 54b of the hosel part 50 (recessed part 54) in the insertion direction of the golf club shaft 120 in the insertion state of the golf club shaft 120 in a state of being fixed to the hosel part 50. Is different. That is, a difference is that the through hole 58 is not formed in the hosel portion 50, and the through hole 122 is formed in the golf club shaft 120 at a position that does not overlap the base portion 31 when the shaft 120 is inserted into the socket 13. Since the other configuration is the same as that of the golf club of the fourth embodiment, detailed description thereof is omitted.
In the present embodiment, the through hole 122 is provided in the golf club shaft 120 at a position where it does not overlap the base 31, so that the adhesive can be easily removed. As a result, it is possible to obtain a golf club having good assembling workability and sufficient strength and durability.

  Also in the present embodiment, when the length L of the base portion 31 is 5 mm or more, the through hole 122 has a diameter of 1 mm or more, and the golf club shaft 120 is fixed to the hosel portion 50 in the center of the through hole 122. The distance h between the position and the upper end surface 54b of the hosel part 50 is preferably 10 mm or more. If the diameter of the through hole 122 is less than 1 mm and the distance h is less than 10 mm, the adhesive may not be sufficiently removed, and good assembly workability may not be obtained. The number of through holes 122 is not particularly limited, and the above-described effects can be obtained as long as at least one through hole 122 is formed at a position satisfying the above-described distance h.

  The socket of the present invention and the golf club using the same have been described above, but the present invention is not limited to the above-described embodiment, and various improvements or modifications may be made without departing from the gist of the present invention. Of course it is good.

  Examples of the present invention will be specifically described below in comparison with comparative examples that are out of the scope of the present invention.

  First, the first embodiment will be described. In the present embodiment, the cantilever bending strength of the golf club using the socket having the base length L and the wall thickness t of the socket having the notch 18 shown in FIGS. 1 (a) and 1 (b) is changed. The workability and durability were evaluated. In this embodiment, the length L of the base is set to five levels of 0, 2, 5, 10, 20 mm, and the wall thickness t is 0.1, 0.2, 0.5, 1.0, 1. A total of 25 sockets were used as 5 levels of 5 mm. In the present example, the width of the notch was 1 mm and the length of the notch was 80% of the length of the base for those having the notch.

  As shown in FIG. 8, the cantilever bending strength is measured by fixing the golf club shaft 120 to the jig 60 via the socket 10. The jig 60 is fixed to a chuck (not shown). The golf club shaft 120 is deflected by pressing the pressing element 62 at a speed of 20 mm / min at a position 150 mm away from the end surface of the jig 60 in the extending direction of the golf club shaft 120, and the breaking load when the golf club shaft 120 is broken Was measured as the cantilever bending strength. In the cantilever bending test, the same golf club shaft was used.

  The workability was evaluated by assembling the golf club head for 10 minutes and assembling the golf club head per minute.

  Hereinafter, the evaluation results of this example will be described. FIG. 9 is a graph showing the relationship between the length and thickness of the base and the cantilever bending strength, with the horizontal axis representing the base length and the vertical axis representing the cantilever bending strength. In FIG. 9, the cantilever bending strength is represented by a strength index, and the larger the value, the higher the strength. Moreover, the length L of the base shown in FIG. 9 is a socket having the shape shown in FIG. 11 having no base.

As shown in FIG. 9, when the wall thickness t is 0.2 mm or more and the base length L is 5 mm or more, sufficient strength can be obtained. On the other hand, in a golf club using a socket having a thickness t of 0.1 mm and a value of the thickness t being less than the lower limit of the present invention, sufficient strength cannot be obtained regardless of the length L of the base portion. . Moreover, sufficient intensity | strength was not able to be obtained about the thing whose length L of a base is less than the lower limit of this invention of less than 5 mm.
Further, the workability was 3.5 / min in any golf club at each point shown in FIG.
That is, in order to ensure strength while ensuring workability, it is necessary that the length L of the base is 5 mm or more and the thickness t of the base is 0.2 mm or more.
The material of the socket was Celluloid (trademark). The length of the flange portion was 5 mm, the diameter of the base portion was 9.1 mm, and the inner diameter of the base portion was 8.3 mm. The golf club shaft made of FRP was used, and the outer diameter of the golf club shaft was 8.5 mm.

Here, golf clubs (club Nos. 1 to 24) were prepared using the sockets shown in Table 1 and Table 2 below, and the cantilever bending strength and workability were evaluated. In addition, durability was also evaluated as necessary. “-” Shown in Table 1 and Table 2 below indicates that there is no “-”.
For durability, an air cannon was used, the initial velocity of the golf ball was 50 m / sec, the striking point was 20 mm from the center of gravity of the golf club head to the heel side, and the golf ball was made to collide with the face surface. The socket was observed to lift up at each shot. Note that the upper limit of the number of hits of the golf ball was 10,000 shots.

The second embodiment of the present invention will be described below. As examples and comparative examples, club Nos. 1 to 6 shown in Table 1 were used. In this embodiment, as shown in Table 1, the depth of the groove of the socket was variously changed. The length of the groove was 80% of the length of the base.
For these clubs Nos. 1 to 6, the cantilever bending strength and workability were evaluated in the same manner as in the first example. These results are shown in Table 3 below. Also in the second embodiment of the present invention, the cantilever bending strength shown in Table 3 is represented by a strength index based on club No. 4 as a reference (100). The numerical values of the cantilever bending strength shown in Table 3 are higher as the numerical value is larger.

As shown in Table 3, clubs Nos. 1 to 3 as examples of the present invention were excellent in both cantilever bending strength and workability. On the other hand, club No. 4, which is a comparative example, has no base and is excellent in workability but inferior in cantilever bending strength. Club No. 5 has excellent cantilever bending strength. However, club No. 5 has a base shape different from that of the present invention. Therefore, it is necessary to first bond the socket to the hosel portion, and then press-fit the golf club shaft into the socket. It was.
Furthermore, club No. 6 has excellent cantilever bending strength. However, since the depth of the groove part of the club No. 6 was less than the lower limit of the present invention, the adhesive was not easily removed and the workability was remarkably inferior.

Next, a third embodiment will be described. As examples and comparative examples, club Nos. 7 to 12 shown in Table 1 above were used. As the golf clubs of club Nos. 8 to 10, golf clubs having tap processing (groove processing) or recesses formed at positions matching the claw portions on the inner peripheral surface of the opening of the hosel portion were used.
For these clubs Nos. 7 to 12, the cantilever bending strength, workability, and durability were evaluated in the same manner as in the first example. In the durability test, five golf clubs were tested on the same type of golf clubs, and the socket float was examined. This evaluated durability. Moreover, the durability test was not performed about what was not workability | operativity. The results are shown in Table 4 below. Also in the third embodiment of the present invention, the cantilever bending strength shown in Table 4 is represented by a strength index based on club No. 11 as a reference (100). The numerical values of the cantilever bending strength shown in Table 4 are higher as the numerical value is larger.

As shown in Table 4 above, clubs Nos. 7 to 10 as examples of the present invention were all excellent in cantilever bending strength, workability, and durability. In particular, the durability of Club No. 8 was further improved by providing a claw portion. Club Nos. 9 and 10 are further improved in durability by providing a claw portion and performing tapping (groove portion processing) at a position aligned with the claw portion on the inner peripheral surface of the opening or providing a recess. Improved.
On the other hand, club No. 11, which is a comparative example, has no base and has good workability, but has poor cantilever bending strength. In addition, neck breakage occurred at 2500 shots. Club No. 12 has good cantilever bending strength, but the shape of the base is different from that of the present invention, and the workability is poor. For this reason, the durability test was not performed.

Next, a fourth embodiment will be described. As examples and comparative examples, club Nos. 13 to 19 shown in Table 2 above were used.
These club Nos. 13 to 19 were evaluated for cantilever bending strength, workability, and durability in the same manner as in the first example. In the endurance test, five golf clubs were tested on the same type of golf club, and the socket float was examined. This evaluated durability. Moreover, the durability test was not performed about what was not workability | operativity. The results are shown in Table 5 below. Note that the value of “gap” shown in the remarks column of Table 2 above is the value of the interval d shown in FIGS. 5A to 5D, and unless otherwise specified, there is no gap. Also in the fourth embodiment of the present invention, the cantilever bending strength shown in Table 5 is represented by a strength index with Club No. 17 as a reference (100). As for the numerical values of the cantilever bending strength shown in Table 5, the larger the numerical value, the higher the strength.

  As shown in Table 5, club Nos. 13 to 16 as examples were all excellent in cantilever bending strength, workability, and durability. In particular, club No. 13 was further improved in workability because a chamfered portion (see FIG. 5B) was formed at the base. In addition, club No. 14 has a flared shape (see FIG. 5C), so that the durability is further improved by the anchor effect. Club No. 15 had a groove (see FIG. 5 (d)) formed at the base, so the durability was further improved by the anchor effect.

  On the other hand, club No. 17, which is a comparative example, has no base and good workability, but has poor cantilever bending strength and durability. Further, Club No. 18 had no clearance and was less than the lower limit of the present invention, and the cantilever bending strength was good, but the workability was poor and the durability test was not performed. Furthermore, club No. 19 had a clearance of 0.1 mm and was less than the lower limit of the present invention, and the cantilever bending strength was good, but the workability was poor and the durability test was not performed.

Next, a fifth embodiment will be described. As examples and comparative examples, club Nos. 20 to 24 shown in Table 2 above were used.
For these clubs Nos. 20 to 24, the cantilever bending strength and workability were evaluated in the same manner as in the first example. The results are shown in Table 6 below. Also in the fifth embodiment of the present invention, the cantilever bending strength shown in Table 6 is represented by a strength index based on the club No. 22 as a reference (100). The values of the cantilever bending strength shown in Table 6 are higher as the value is larger.

  Club No. 20 shown in Table 2 above is one in which one through hole with a diameter of 1 mm is formed at a position where the distance H shown in FIG. 6 is 15 mm, the length of the base of the socket is 10 mm, The thickness is 1 mm. Club No. 21 is one in which one through hole having a diameter of 1 mm is formed at a position where the distance h shown in FIG. 7 is 10 mm, the length of the base of the socket is 8 mm, and the thickness is 1 mm. Club No. 24 is one in which one through hole having a diameter of 1 mm is formed at a position where the distance h shown in FIG. 7 is 5 mm, the length of the base of the socket is 5 mm, and the thickness is 1 mm.

As shown in Table 6 above, club Nos. 20 and 21 as examples were excellent in both cantilever bending strength and workability.
On the other hand, club No. 22, which is a comparative example, was excellent in workability, but did not have a base portion and had poor cantilever bending strength. Moreover, although club No. 23 was excellent in cantilever bending strength, the through hole was not formed, the adhesive was not easily removed, and the workability was poor. In Club No. 24, the position of the through hole formed in the golf club shaft overlaps with the base portion, so that the adhesive is not easily removed and the cantilever bending strength is poor.

(A) is a side view which shows the socket used for the golf club which concerns on the 1st Embodiment of this invention, (b) is sectional drawing by the AA line of (a). It is sectional drawing which shows the modification of the socket of the 1st Embodiment of this invention. (A) is a side view which shows the socket used for the golf club which concerns on the 2nd Embodiment of this invention, (b) is sectional drawing by the BB line of (a). It is sectional drawing which shows the modification of the socket of the 2nd Embodiment of this invention. (A) is a fragmentary sectional view of the principal part of the golf club which concerns on the 3rd Embodiment of this invention, (b) thru | or (d) are the 1st thru | or 3rd modification of 3rd Embodiment. It is a fragmentary sectional view of the important section showing. It is a fragmentary sectional view showing an important section of a golf club concerning a 4th embodiment of the present invention. It is a fragmentary sectional view showing an important section of a golf club concerning a 5th embodiment of the present invention. It is a schematic diagram which shows the measuring apparatus of cantilever bending strength. It is a graph which shows the relationship between the length and thickness of a base, and cantilever bending strength, taking the length of a base on a horizontal axis, and taking cantilever bending strength on a vertical axis | shaft. It is a disassembled perspective view which shows an example of the conventional golf club which improved the bendability of the golf club shaft. (A) And (b) is typical sectional drawing which shows the manufacturing method of the conventional golf club which improved the bendability of the golf club shaft shown in FIG. 10 in order of a process. (A) And (b) is a schematic diagram which shows the assembly method of the golf club using the socket which has the conventional base. It is a schematic diagram which shows the other manufacturing method of the golf club using the socket which has the conventional base.

Explanation of symbols

10, 10a, 10b, 10c Socket 11, 11a, 11b, 11c, 13 Socket 12 Flange 14 Base 16 Strip 17 Claw 18 Notch 20, 58 Through hole 22 Base 24 Groove 30, 30a, 30b, 30c Base 32 , 34, 36 Chamfered portion 38 Recess 40 Golf club head 42 Body 44 Face surface 50 Hosel portion 52 Opening portion 54 Recess 56 Clearance 57 Adhesive 60 Jig 100, 110 Socket 120 Golf club shaft

Claims (10)

A socket for fixing a golf club shaft to a golf club head,
A cylindrical base and a flange formed at one end of the base;
A through-hole penetrating the base and the flange is formed, and at least two grooves or notches extending from the other end toward the one end are formed in the base,
When the length of the base is 5 mm or more, the thickness of the base is 0.2 mm or more, and the groove is formed, the depth of the groove is 0.2 mm or more, and the groove and the notch The socket has a length of 10% to 100% of the length of the base.   The socket according to claim 1, wherein the base is provided with a protrusion protruding radially from a central axis of the through hole on the outer peripheral surface. In order to fix the golf club shaft, the base has a base inserted into an opening of a hosel part provided in a golf club head, and a flange formed at one end of the base and protruding from the opening. And a through-hole penetrating the flange portion is formed, and the golf club shaft is inserted into the through-hole,
The socket is characterized in that the outer peripheral surface of the base portion is formed to have a gap of 0.2 to 0.5 mm with respect to the inner peripheral surface of the opening of the hosel portion. A golf club head provided with a hosel part for fixing a golf club shaft, a base part inserted into an opening part of the hosel part, and a flange part formed at one end of the base part and projecting from the opening part, A golf club having a base and a through-hole penetrating the flange, and having a socket through which the golf club shaft is inserted;
The socket has at least two grooves or notches extending from the other end toward the one end at the base,
When the length of the base is 5 mm or more, the thickness of the base is 0.2 mm or more, and the groove is formed in the base, the depth of the groove is 0.2 mm or more, The length of the groove part and the notch part is 10% to 100% of the length of the base part.   The golf club according to claim 4, wherein the socket is provided with a protrusion protruding radially from a central axis of the through hole on an outer peripheral surface of the base portion.   The golf club according to claim 5, wherein the hosel portion has a recess or a groove formed on an inner peripheral surface of the opening at a position at least aligned with the protrusion. A golf club head provided with a hosel part for fixing a golf club shaft, a base part inserted into an opening part of the hosel part, and a flange part formed at one end of the base part and projecting from the opening part, A golf club having a base and a through-hole penetrating the flange, and having a socket through which the golf club shaft is inserted;
A golf club having a gap of 0.2 to 0.5 mm between an inner peripheral surface of the opening of the hosel portion and an outer peripheral surface of the base portion.   When the golf club shaft is fixed to the golf club shaft, the first hole having a diameter of 1 mm or more formed in the hosel portion at a position 15 mm or more away from the end surface of the opening and the golf club shaft is fixed. 8. The golf club according to claim 4, comprising at least one second hole having a diameter of 1 mm or more formed at least one at a position separated from the end face of the opening by 10 mm or more. A golf club head provided with a hosel part for fixing a golf club shaft, a base part inserted into an opening part of the hosel part, and a flange part formed at one end of the base part and projecting from the opening part, A golf club having a base and a through hole penetrating the flange portion, and a socket through which the golf club shaft is inserted;
The length of the opening portion in the insertion direction of the golf club shaft is longer than the length in the base portion insertion direction, and the hosel portion is separated from the end surface of the opening portion than the length of the base portion in the insertion direction. A golf club, wherein at least one first hole having a diameter of 1 mm or more is formed at a position. A golf club head provided with a hosel part for fixing a golf club shaft, a base part inserted into an opening part of the hosel part, and a flange part formed at one end of the base part and projecting from the opening part, A golf club having a base and a through hole penetrating the flange portion, and a socket through which the golf club shaft is inserted;
The length of the opening in the insertion direction of the golf club shaft is longer than the length of the base in the insertion direction, and when the golf club shaft is fixed to the hosel portion on the golf club shaft, A golf club characterized in that at least one second hole having a diameter of 1 mm or more is formed at a position distant from the end face of the opening portion than the length of the base portion in the insertion direction.

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