JP5503373B2 - Golf club and spacer member - Google Patents

Description

  The present invention relates to a golf club and a spacer member used for the golf club.

  In a golf club, the direction of the shaft relative to the head, that is, the mounting angle of the shaft is an important matter that determines the lie angle, loft angle, and face angle. Patent Document 1 includes a head formed with a member mounting hole, a cylindrical shaft mounting member inserted into the member mounting hole, and a shaft inserted into a shaft mounting hole formed in the cylindrical shaft mounting member. A golf club is provided. In such a golf club, the central axis of the shaft mounting hole formed in the cylindrical shaft mounting member is set to be inclined with respect to the central axis of the member mounting hole formed in the head. The user can set the mounting angle of the shaft to a desired value by assembling the head and the shaft using a cylindrical shaft member having a desired inclination.

JP 08-336622 A

  However, since such a golf club uses a cylindrical shaft mounting member, a member mounting hole formed in the head has a large diameter, so that a joint portion between the head and the shaft, that is, a so-called neck portion becomes heavy. Have.

  The present invention has been made in view of the above circumstances, and is used for a golf club and a golf club that can reduce the weight of the head by reducing the inner diameter of the hole of the head into which the shaft is inserted. It is an object to provide a spacer member.

In order to solve the above problems, the present invention is provided between a shaft, a head in which a hole into which an end of the shaft is inserted is formed, and an end of the shaft and an inner peripheral surface of the hole. A spacer member, wherein the spacer member fills a gap between the end of the shaft and the inner peripheral surface of the hole in a part of the bottom side of the hole. And a second part that fills a gap between the end of the shaft and the inner peripheral surface of the hole in the other circumferential part on the opening side of the hole, and the first part And the second part are offset so as to be axially offset and opposed to each other across the end of the shaft in an axial view, and the spacer member is arranged on the bottom side of the hole. Part of the outer peripheral surface where the first part is provided The side facing in the axial view is exposed from the spacer member, and the side facing the portion in the axial view of the outer peripheral surface of the shaft that is the opening side of the hole is provided in the axial view. The spacer member is exposed from a spacer member, and the spacer member maintains a posture of an end portion of the shaft in the hole portion so that a central axis of the shaft is inclined with respect to a central axis of the hole portion. To do.

  According to this configuration, the first part and the second part of the spacer member are arranged to face each other with the shaft interposed therebetween, and the mounting angle of the shaft is set by the cooperation of the spacer member and the hole of the head. Therefore, the spacer member can be reduced in size.

  The first part and the second part may each have a circular arc shape when viewed in the axial direction.

  According to such a configuration, since the first part and the second part have an arc shape, the gap between the end of the shaft and the inner peripheral surface of the hole can be filled appropriately.

  The first part and the second part may be connected by a connecting part.

  According to such a configuration, since the first part and the second part of the spacer member are connected by the connecting portion, the relative positions of the first part and the second part do not shift.

  The end of the shaft and the spacer member may be inserted into the hole while being fixed to each other.

  According to such a configuration, the shaft end and the spacer member can be inserted and assembled into the hole of the club while being fixed to each other.

Further, the present invention provides a golf club comprising a shaft and a head in which a hole into which the end of the shaft is inserted is formed, and between the end of the shaft and the inner peripheral surface of the hole. A spacer member provided, a first portion that fills a gap between an end of the shaft and an inner peripheral surface of the hole in a part of a circumferential direction on the bottom side of the hole, and an opening of the hole A second portion that fills a gap between the end portion of the shaft and the inner peripheral surface of the hole portion in the other circumferential portion on the side, and the first portion and the second portion are in the axial direction. It is positionable so as to face each other across the end of the shaft in the axial view as well as offset, of the outer peripheral surface of the shaft as the bottom side of the hole, a portion said first portion is provided And the side facing the axis line is exposed from the spacer member Both of the outer peripheral surface of the shaft as the opening side of the hole, the side facing in the site with the axis view as the second part is provided exposed from the spacer member, the central axis of the shaft is the The posture of the end of the shaft is maintained in the hole so as to be inclined with respect to the central axis of the hole.

  The first part and the second part may each have a circular arc shape when viewed in the axial direction.

  The first part and the second part may be connected by a connecting part.

  According to the present invention, since the spacer member can be reduced in size, the weight of the head can be reduced by reducing the inner diameter of the hole of the head into which the shaft is inserted. In addition, by reducing the weight of the joint between the head and the shaft, that is, the so-called neck portion, the degree of freedom in designing the head can be increased.

  In addition, according to the present invention, the gap between the end portion of the shaft and the inner peripheral surface of the hole portion can be suitably filled, so that the posture of the end portion of the shaft can be suitably maintained.

  Further, according to the present invention, since the shaft end and the spacer member are fixed to each other, the shaft is inserted and assembled into the hole of the club, so that the shaft can be attached by rotating the shaft and spacer member assembly. The angle can be easily adjusted.

  Further, according to the present invention, since the first part and the second part of the spacer member are connected by the connecting portion, the relative positions of the first part and the second part do not shift. The assembly work to the shaft and the adjustment of the shaft mounting angle are easy.

1 is a perspective view showing a golf club according to an embodiment of the present invention. (A) is a perspective view which shows the spacer member which concerns on embodiment of this invention, (b) is a figure which shows the state which assembled | attached the shaft and the spacer member mutually and inserted in the hole of the head. (A) is X1 arrow sectional drawing of FIG.2 (b), (b) is X2 arrow sectional drawing of FIG.2 (b). (A) (b) is a partially broken figure which shows the state which mutually assembled | attached the head and the shaft using the spacer member. (A) (b) is a partially broken figure which shows the state which mutually assembled | attached the head and the shaft using the spacer member. (A)-(c) is a figure which shows the modification of the spacer member of this invention, and is a partially broken figure which shows the state which mutually assembled | attached the head and the shaft using the spacer member. (A) (b) is a figure which shows the modification of the spacer member of this invention, and is a partially broken figure which shows the state which mutually assembled | attached the head and the shaft using the spacer member.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the accompanying drawings, taking as an example the case where the golf club of the present invention is applied to a right-handed wood. In the following figures, in order to prioritize the ease of understanding of the figures, the size, the balance of thickness, etc. of each member are appropriately changed as compared with the actual thing. As shown in FIG. 1, the golf club 1 according to the embodiment of the present invention includes a head 10 and a shaft 20.

  The head 10 includes a front face portion 11 that collides with a ball during a shot, an upper crown portion 12, a lower sole portion 13, a heel portion 14 on a proximal side (shaft 20 side), and a distal end. The side toe part 15 of the side and the back part 16 (refer FIG. 5) of the rear part are provided. On the heel portion 14 side of the crown portion 12 of the head 10, a bottomed cylindrical hole portion 12a (see FIG. 2B) having an opening in the crown portion 12 is formed. The inner diameter of the hole 12 a is larger than the outer diameter of the other end 22 of the shaft 20.

  One end 21 of the shaft 20 is a grip portion, and the other end 22 is a hole 12a (see FIG. 2B) of the head 10 with a spacer member 30 (see FIG. 2A) described later interposed therebetween. It is inserted and assembled.

  The golf club 1 according to the embodiment of the present invention further includes a spacer member 30 shown in FIG. The spacer member 30 is a member provided in a gap between the hole 12a of the head 10 and the other end 22 of the shaft 20, and is formed of resin, fiber reinforced resin, hard rubber, metal (aluminum, titanium, etc.), or the like. This is a flexible member. The spacer member 30 preferably has a specific gravity of 3.0 or less from the viewpoint of weight reduction. The spacer member 30 is a member having a shape obtained by cutting out a cylindrical member, and includes a first portion 31, a second portion 32, and a connecting portion 33. As shown in FIG. 3B, the first part 31 is a part that exhibits an arc shape in the axial view. The second part 32 is arranged above the first part 31 (on the crown portion 12 (see FIG. 1) side), and as shown in FIG. It is. The first part 31 and the second part 32 are arranged so as to face each other with the other end 22 of the shaft 20 interposed therebetween in the axial view.

  The first portion 31 is formed so as to become thinner from the bottom of the hole 12a toward the opening as shown in FIG. 2 (b), and also in the circumferential direction as shown in FIG. 3 (b). It forms so that it may become thin as it goes to the circumferential direction edge part from the center. Further, as shown in FIG. 2B, the second portion 32 is formed so as to become thicker from the bottom of the hole 12a toward the opening, and as shown in FIG. It forms so that it may become thin as it goes to a circumferential direction edge part from the circumferential direction center. By doing in this way, the shape of the 1st site | part 31 and the 2nd site | part 32 is matched with the shape of the clearance gap between the hole 12a and the other end 22 of the shaft 20, and the attachment angle of the shaft 20 with respect to the hole 12a Can be stabilized.

The length of each arc of the first part 31 and the second part 32 is set to be equal to or less than the length of the semicircular arc. It is desirable that the length of each arc of the first part 31 and the second part 32 is set to ¼ or less of the length of the semicircular arc. Further, the axial length L ₁ of the first part 31, the circumferential length L ₂ of the first part 31, the axial length L ₃ of the second part 32, and the circumferential direction of the second part the length _{L 4} is a is set to 1/2 or more of the wall thickness of the other end 22 of the shaft 20 (e.g., when the thickness of the other end 22 of the shaft 20 is 2.5～3.0Mm, 1 0.5 mm or more) is desirable. This is because when the lengths L1 to L4 are less than ½ of the thickness of the other end 22 of the shaft 20, the first part 31 and the second part 32 may be damaged due to stress concentration. It is.

  The connecting portion 33 is a portion that connects the first portion 31 and the second portion 32 to each other. The connecting portion 33 may be formed thinner than the first portion 31 and the second portion 32 so as to match the shape of the gap between the hole portion 12a of the head 10 and the other end 22 of the shaft 20. desirable. By doing in this way, it can prevent that the restriction | limiting of the attachment angle of the shaft 20 with respect to the hole 12a arises with the thickness of the connection part 33. FIG.

  The inner diameter of the spacer member 30 is set to be equal to or slightly larger than the outer diameter of the other end 22 of the shaft 20, and the outer diameter of the spacer member 30 is the hole of the head 10. It is set to be the same as the inner diameter of the portion 12 a or slightly smaller than the inner diameter of the hole portion 12 a of the head 10.

  When the head 10 and the shaft 20 are assembled to each other, first, the spacer member 30 is externally fitted to the other end 22 of the shaft 20 to fix them together, and the shaft 20 and the spacer member 30 shown in FIG. The assembly is manufactured. In FIG.2 (b), the 1st site | part 31 and the 2nd site | part 32 are emphasized and shown using the dot. In this state, the side facing the first part 31 of the other end 22 of the shaft 20 across the axis and the side facing the second part 32 of the other end 22 of the shaft 20 across the axis are exposed. doing. Subsequently, the assembly of the shaft 20 and the spacer member 30 is inserted into the hole 12a of the head 10, and then the adhesive is filled into the gap in the hole 12a by injecting the adhesive into the hole 12a. Then, the assembly of the head 10 and the spacer member 30 and the head 10 are fixed to each other. The assembly of the head 10 and the spacer member 30 and the head 10 are inserted by inserting the assembly of the shaft 20 and the spacer member 30 into the hole 12a in a state where the adhesive is applied to the inner peripheral surface of the hole 12a. May be fixed to each other.

  In a state where the other end 22 of the shaft 20 and the spacer member 30 are inserted into the hole 12 a of the head 10, the inner surface of the spacer member 30 abuts on the outer peripheral surface of the other end 22 of the shaft 20, and the outer surface of the spacer member 30. Is in contact with the inner peripheral surface of the hole 12a. Further, at the other end 22 of the shaft 20, the outer peripheral surface on which the first portion 31 is provided in an axial view and the outer peripheral surface on the opposite side across the axial center of the other end 22 of the shaft 20 are covered with the spacer member 30. It is not carried out, but it exposes with respect to the internal peripheral surface of the hole 12a, and the part (the insertion site | part lower end of the other end 22 of the shaft 20) is contact | abutting to the internal peripheral surface of the hole 12a, and it is an axial view. The outer peripheral surface provided with the second portion 32 and the outer peripheral surface on the opposite side across the axial center of the other end 22 of the shaft 20 are not covered with the spacer member 30 and are not covered with the inner peripheral surface of the hole 12a. A part thereof (upper end of the insertion portion of the other end 22 of the shaft 20) is exposed to the inner peripheral surface of the hole 12a. With this configuration, the spacer member 30 maintains the posture of the end portion 22 of the shaft 20 in the hole portion 12a so that the central axis of the shaft 20 is inclined with respect to the central axis of the hole portion 12a.

<Usage example of spacer member>
Next, a state in which the head 10 and the shaft 30 are assembled to each other using the spacer member 30 will be described with reference to FIGS. 4 and 5. In the following drawings, the deviation between the center axis C ₁₀ of the hole 12a of the central axis C ₂₀ and the head 10 of the shaft 20 is exaggerated for explanation.

≪Lie angle adjustment≫
As shown in FIG. 4A, the head 10 and the shaft 20 are placed with the spacer member 30 disposed so that the first part 31 is on the toe part 15 side and the second part 32 is on the heel part 14 side. When assembled, the first part 31 fills the gap between the other end 22 of the shaft 20 and the hole part 12a on the bottom part side of the hole part 12a, and the second part 32 becomes the hole part 12a. Figure by filling the gap between the other end 22 and the hole 12a of the shaft 20 in the heel portion 14 side of the opening side, with respect to the hole 12a central axis _{C 10} of the center axis _{C 20} is the head 10 of the shaft 20 of Since the inclined state is shifted in the counterclockwise direction in 4 (a), the lie angle of the golf club 1 is set large (compared to the state in FIG. 4 (b)).

On the other hand, as shown in FIG. 4B, the head 10 and the shaft 20 in a state where the spacer member 30 is arranged so that the first portion 31 is on the heel portion 14 side and the second portion 32 is on the toe portion 15 side. Are assembled, the first portion 31 fills the gap between the other end 22 of the shaft 20 and the hole 12a on the heel portion 14 side on the bottom side of the hole 12a, and the second portion 32 has a hole. by filling the gap between the other end 22 and the hole 12a of the shaft 20 in the toe portion 15 side of the open side of the part 12a, against the hole 12a central axis _{C 10} of the center axis _{C 20} is the head 10 of the shaft 20 Therefore, the lie angle of the golf club 1 is set to be small (compared to the state of FIG. 4A).

≪Loft angle adjustment≫
As shown in FIG. 5A, the head 10 and the shaft 20 are placed with the spacer member 30 disposed so that the first part 31 is on the face part 11 side and the second part 32 is on the back part 16 side. When assembled, the first part 31 fills the gap between the other end 22 of the shaft 20 and the hole part 12a on the face part 11 side on the bottom side of the hole part 12a, and the second part 32 becomes the hole part 12a. Figure by filling the gap between the other end 22 and the hole 12a of the shaft 20 in the back portion 16 side of the opening side, with respect to the hole 12a central axis _{C 10} of the center axis _{C 20} is the head 10 of the shaft 20 of Since the inclined state is shifted in the counterclockwise direction in 5 (a), the loft angle of the golf club 1 is set large (compared to the state in FIG. 5 (b)).

On the other hand, as shown in FIG. 4B, the head 10 and the shaft 20 are arranged with the spacer member 30 disposed so that the first portion 31 is on the back portion 16 side and the second portion 32 is on the face portion 11 side. Are assembled, the first portion 31 fills the gap between the other end 22 of the shaft 20 and the hole portion 12a on the back portion 16 side on the bottom side of the hole portion 12a, and the second portion 32 has a hole. by filling the gap between the other end 22 and the hole 12a of the shaft 20 in the face portion 11 side of the opening side of the section 12a, with respect to the hole 12a central axis _{C 10} of the center axis _{C 20} is the head 10 of the shaft 20 Therefore, the golf club 1 is set to have a small loft angle (compared to the state shown in FIG. 5A).

  In the golf club 1 according to the embodiment of the present invention, the first portion 31 and the second portion 32 of the spacer member 30 are arranged so as to face each other with the other end 22 of the shaft 20 interposed therebetween, and the spacer member 30 and the head 10 are arranged. Since the mounting angle of the shaft 20 is set in cooperation with the hole portion 12a, the spacer member 20 can be reduced in size, and the inner diameter of the hole portion 12a of the head 10 into which the shaft 20 is inserted is reduced. By doing so, the weight of the head 10 can be reduced. In addition, by reducing the weight of the joint portion between the head 10 and the shaft 20, a so-called neck portion, the degree of freedom in designing the head 10 can be increased.

  Moreover, since the shape of the spacer member 30 is simplified in the golf club 1 according to the embodiment of the present invention, the shaft 20 can be easily removed and cleaned when the shaft 20 is replaced. The risk of breakage can be reduced.

  In addition, the golf club 1 according to the embodiment of the present invention has a gap between the other end 22 of the shaft 20 and the inner peripheral surface of the hole 12a when the first portion 31 and the second portion 32 have an arc shape. Therefore, the posture of the other end 22 of the shaft 20 can be suitably maintained.

  Moreover, since the 1st site | part 31 and the 2nd site | part 32 of the spacer member 30 are connected by the connection part 33, the golf club 1 which concerns on embodiment of this invention has the 1st site | part 31 and the 2nd site | part 32. The relative position of the part 32 does not shift, and the assembly operation to the shaft 20 and the adjustment of the mounting angle of the shaft 20 are easy.

  In addition, the golf club 1 according to the embodiment of the present invention is inserted and assembled into the hole 12a of the club 10 with the other end 22 of the shaft 20 and the spacer member 30 fixed to each other. By rotating the assembly of the member 30, the mounting angle of the shaft 20 with respect to the head 10 can be easily adjusted.

For example, the inner diameter of the hole 12 a of the head 10 is 9.1 mm, the depth of the hole 12 a is 40 mm, the outer diameter of the other end 22 of the shaft 20 is 8.5 mm, and the axial length of the other end 22 of the shaft 20. When the (adhesion dimension) was 37 mm and the total length of the spacer member 30 was slightly shorter than 37 mm, the angle of C ₂₀ (adjustment range) with respect to C ₁₀ could be ± 0.93 °. Further, the inner diameter of the hole 12a of the head 10 is 9.6 mm, the depth of the hole 12a is 40 mm, the outer diameter of the other end 22 of the shaft 20 is 8.9 mm, and the axial length of the other end 22 of the shaft 20 is. When the (adhesion dimension) was 37 mm and the total length of the spacer member 30 was slightly shorter than 37 mm, the angle of C ₂₀ (adjustment range) with respect to C ₁₀ could be ± 1.08 °. The adjustment range is
0.5 ° ≦ tan ⁻¹ {(inner diameter of hole 12a−outer diameter of other end 22 of shaft 20) / depth of hole 12} ≦ 3.0 °
It is desirable to set to the range of
0.5 ° ≦ tan ⁻¹ {(inner diameter of hole 12a−outer diameter of other end 22 of shaft 20) / depth of hole 12} ≦ 1.0 °
It is further desirable to set the value within the range.

<Modification of spacer member>
Next, the shape of the modified example of the spacer member will be described with reference to FIGS. 6 (a) to 6 (c) and FIGS. 7 (a) and 7 (b). Similarly to the spacer member 30 according to the embodiment, the spacer members 30A to 30E according to the modified example have first portions 31A to 31E, second portions 32A to 32E, and connecting portions 33A to 33E that connect them. And comprising. That is, the shapes of the first part, the second part, and the connecting portion are appropriately set according to the adjustment range such as the lie angle and the loft angle.

  In the spacer member 30A shown in FIG. 6A, the first part 31A and the second part 32A are shorter in the full length direction (axial direction) than the first part 31 and the second part 32 according to the embodiment. Since it is formed, further weight reduction is possible.

  In the spacer member 30B shown in FIG. 6B, the first part 31B and the second part 32B are longer in the full length direction (axial direction) than the first part 31 and the second part 32 according to the embodiment. Since it is formed, the area where the first part 31 and the second part 32 come into contact with the inner peripheral surface of the hole 12a is increased, and the posture of the shaft 20 with respect to the hole 12a is stabilized.

  Since the spacer member 30C shown in FIG. 6C is formed so that the connecting portion 30C has a curved shape, the first part 31A and the second part 32A are the first part 31 according to the embodiment. And since it is formed longer in the full length direction (axial direction) than the second part 32, the attaching operation of the spacer member 30C to the shaft 20 is easy to perform.

  In the spacer member 30 </ b> D shown in FIG. 7A, the connecting portion 30 </ b> D is formed wide, so that the mounting property of the spacer member 30 </ b> D on the shaft 20 is improved.

  In the spacer member 30E shown in FIG. 7B, the length in the full length direction (axial direction) of the first portion 31E and the second portion 32E is 1/2 or more and 3/4 or less of the full length of the spacer member 30E. Therefore, the mounting property of the spacer member 30D to the shaft 20 is improved.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the summary of this invention. For example, the posture of the spacer member 30 in the hole 12a is not limited to that shown in FIGS. 4 and 5, and by adopting a posture intermediate between the postures shown in FIGS. 4 and 5, the lie angle and Both loft angles can be adjusted simultaneously. The spacer member 30 can also be used for adjusting the face angle of the golf club 1. Further, the spacer member may not include the connecting portion, and the first part and the second part may be configured separately. In addition, the connecting portion is configured to connect only one side of the first portion and the second portion, and the spacer member is formed so as to exhibit a C shape in the axial view, whereby the shaft and the spacer are formed. When the members are assembled to each other, the spacer member can be deformed in the direction of spreading to facilitate the assembling work with the shaft.

1 golf club 10 head 12a hole 20 shaft 22 other end (end)
30 (30A to 30E) Spacer member 31 (31A to 31E) First part 32 (32A to 32E) Second part 33 (33A to 33E) Connecting portion

Claims (7)

A shaft,
A head formed with a hole into which an end of the shaft is inserted;
A spacer member provided between an end of the shaft and an inner peripheral surface of the hole;
A golf club comprising:
The spacer member is
A first portion that fills a gap between the end of the shaft and the inner peripheral surface of the hole in a part of the circumferential direction on the bottom side of the hole;
A second portion that fills a gap between the end of the shaft and the inner peripheral surface of the hole in the other circumferential portion on the opening side of the hole;
With
The first part and the second part are arranged so as to be offset in the axial direction and to face each other with the end of the shaft in an axial view,
The spacer member exposes, from the spacer member, a side of the outer peripheral surface of the shaft, which is the bottom side of the hole portion, facing the portion where the first portion is provided in an axial view, and the hole portion. Of the outer peripheral surface of the shaft that becomes the opening side of the shaft, the side facing the portion provided with the second portion in an axial view is exposed from the spacer member,
The golf club characterized in that the spacer member maintains the posture of the end of the shaft in the hole so that the central axis of the shaft is inclined with respect to the central axis of the hole. 2. The golf club according to claim 1, wherein each of the first part and the second part has an arc shape in an axial view. The golf club according to claim 1 or 2, wherein the first part and the second part are connected by a connecting part. 4. The golf club according to claim 1, wherein the end portion of the shaft and the spacer member are inserted into the hole portion while being fixed to each other. In a golf club comprising a shaft and a head in which a hole into which the end of the shaft is inserted is formed, a spacer member provided between the end of the shaft and the inner peripheral surface of the hole. And
A first portion that fills a gap between the end of the shaft and the inner peripheral surface of the hole in a part of the circumferential direction on the bottom side of the hole;
A second portion that fills a gap between the end of the shaft and the inner peripheral surface of the hole in the other circumferential portion on the opening side of the hole;
With
The first part and the second part can be arranged so as to be offset in the axial direction and to face each other with the end portion of the shaft in an axial view.
Of the outer peripheral surface of the shaft that becomes the bottom side of the hole, the side facing the part provided with the first part in an axial view is exposed from the spacer member, and becomes the opening side of the hole Of the outer peripheral surface of the shaft, the side facing the portion provided with the second portion in an axial view is exposed from the spacer member,
The spacer member characterized by maintaining the posture of the end of the shaft in the hole so that the central axis of the shaft is inclined with respect to the central axis of the hole. The spacer member according to claim 5, wherein each of the first part and the second part has an arc shape when viewed in an axial direction. The spacer member according to claim 5 or 6, wherein the first portion and the second portion are connected by a connecting portion.

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