WO2021070242A1

WO2021070242A1 - Golf club

Info

Publication number: WO2021070242A1
Application number: PCT/JP2019/039629
Authority: WO
Inventors: 松彦三邊
Original assignee: 株式会社カムイワークスジャパン
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2021-04-15
Also published as: CN113950360A; KR20220069882A

Abstract

Included is a metal head body 14 that is hollow and open on a face surface side thereof, and a face surface member 12 that is joined to an opening section of a face surface 12a side of the head body 14 and forms the face surface 12a. In a state in which the face surface member 12 is joined integrally to the head body 14, a shaft-like member 20 is provided in the head body 14 so as to face the center of a reverse surface 12b of the face surface member 12. A tip end section 20d of the shaft-like member 20 opposes the center of the reverse surface 12b of the face surface member 12 with a prescribed gap W therebetween. The gap W is an interval at which the reverse surface 12b can collide due to the face member 12 bending when a golf club head 10 strikes a golf ball. The center axis of the shaft-like member 20 is positioned in the perpendicular direction with respect to the reverse surface 12b of the face surface member 12. The shaft-like member 20 is capable of adjusting said position in the center axis direction. Compression-direction force is applied on the shaft-like member 20 due to the collision of the face member 12 when a golf ball is struck.

Description

Golf club

The present invention relates to a golf club provided with a golf club head called metal wood formed by a metal outer shell.

In recent years, so-called metal wood has a main body part formed by casting and a head part formed by joining the front face part by welding. The driver, who is the first wood of this type of golf club, is required to have a golf club head that is lightweight and has a stronger repulsive force when hit. In particular, the spring effect on the face surface of the golf club head is effective in extending the flight distance of the hit ball.

Therefore, as disclosed in Patent Document 1, a golf club has been proposed in which a spring member is built in the golf club head and the back surface of the face surface is pressed by the spring member to give momentum to the hit ball. There is. The golf club of Patent Document 1 is a golf club provided with an adjusting member for adjusting the position of a spring member so that the position of the adjusting member matches the position of the center of gravity of the golf club head. As a result, the inner surface of the face of the golf club head is pressed by the spring member, and the depth of the center of gravity of the golf club head can be appropriately adjusted by the pressing pressure adjusting member.

Further, Patent Document 2 discloses a golf club in which a shaft-shaped member extending obliquely from the sole is installed on the back surface of the face of the golf club head to increase the rigidity of the face in a region where the shaft-shaped member abuts. There is. Further, it is also disclosed that the repulsive force of the face can be adjusted and a golf club head suitable for the usage conditions can be formed by making the shaft-shaped member removable and changing its rigidity.

JP 2016-158915 International release WO2010 / 126729

In the case of the golf club disclosed in Patent Document 1 of the above-mentioned conventional technique, the spring member abuts on the face surface of the golf club head to enhance the repulsive performance of the face, but the thickness of the face surface is increased. Sufficient repulsive force could not be obtained unless the repulsion due to compression of the spring member was increased to some extent while making it thinner. This is an instantaneous repulsion when trying to increase the initial velocity when hitting a golf ball with a spring member, so there is no effect unless an extremely hard spring with a large elastic modulus is used, and the hard spring member has a large mass and is a golf club. This was not preferable because the mass of the head increased. Furthermore, golf club heads with high resilience performance, in which the spring member is always in contact with the face surface, do not conform to the regulations of SLE (Spring Like Effect) because the coefficient of restitution (COR) of the face surface exceeds a certain value (0.830). It becomes. Therefore, such a golf club head has a problem that its use is prohibited by the rules in official competitions.

Further, the golf club disclosed in Patent Document 2 also has the same problem as described above, and further, since the shaft-shaped member is not perpendicular to the face surface but is in contact with the face surface diagonally from the sole. A moment other than compression acts on the shaft-shaped member against the deflection of the face surface, and in the longitudinal direction of the shaft-shaped member, only a part of the force from the face surface acts, supports the face surface, and applies a repulsive force to the ball. The effect on is small.

The present invention has been made in view of the above-mentioned problems of the prior art, and effectively increases the repulsive force transmitted from the face surface at the time of hitting the ball to the ball under certain conditions to increase the ball speed at the time of hitting the ball. Therefore, it is possible to extend the flight distance of the ball, and it is an object of the present invention to provide a golf club equipped with a golf club head that conforms to golf rules.

The present invention comprises a golf club head comprising a hollow metal head body having an opening on the face surface side and a face surface member joined to the opening on the face surface side of the head body to form a face surface. A club, in which the face surface member is integrally joined to the head body, the head body is provided with a shaft-shaped member facing the center of the back surface of the face surface member, and the shaft-shaped member is provided. The tip portion faces the central portion of the back surface of the face surface member with a predetermined gap, and the gap causes the face surface member to bend and collide with the back surface when a golf ball is hit by the golf club head. The central axis of the shaft-shaped member is located in a direction perpendicular to the back surface of the face surface member, and the position of the shaft-shaped member is adjustable in the central axis direction. The golf club is provided with a golf club head provided so that a force in the compression direction acts on the shaft-shaped member due to the collision of the face surface member when the golf ball is hit.

The shaft-shaped member is a metal pillar and is provided so as to cross the position of the center of gravity of the golf club head. The gap is set at an interval of about the thickness of the face surface member. Further, the shaft-shaped member has a male screw, and the male screw is screwed into a female screw of a recess formed in the sole portion of the head body to be provided so that the position can be adjusted. The male screw is screwed into the female screw of the mounting hole formed in the recess, and the head of the shaft-shaped member is exposed in the recess, and the position of the shaft-shaped member is provided by the head. Is provided so that it can be adjusted.

An elastic member, which is a spring made of resin, rubber, or other metal, is provided at the tip of the tip of the shaft-shaped member facing the center of the back surface of the face member, and the elastic member is the elastic member. It faces the central portion of the back surface with a predetermined gap.

In the golf club of the present invention, the inner surface of the face surface member and the tip of the shaft-shaped member face each other with a predetermined gap inside the golf club head, so that the face surface member bent by the hit ball when the golf club is hit. Collides with the tip of the shaft-shaped member and compresses the shaft-shaped member. As a result, the repulsive force due to the bending of the face surface member and the repulsive force during compression of the shaft-shaped member are transmitted to the golf ball via the face surface member, and the ball speed at the time of hitting the golf ball is increased. In particular, since the tip of the shaft-shaped member is separated from the back surface of the face surface member, the repulsive force due to the relatively flexible bending of the face surface member and the repulsive force due to the compression of the shaft-shaped member act instantly. The repulsive force is effectively transmitted from the face surface to the ball. Moreover, since the shaft-shaped member is not in constant contact with the face surface member, it does not violate the golf rules and can be used in official competitions.

Further, in the golf club of the present invention, the depth of the center of gravity of the golf club head can be adjusted by adjusting the position of the shaft-shaped member, and the depth of the center of gravity is made shallow so that the trajectory of the hit ball does not increase and the ball speed. Can be enhanced. On the contrary, the depth of the center of gravity is deepened so that the hit ball can be easily raised, and the golf club head can be made more suitable for beginners. As a result, the golf club of the present invention is a golf club that conforms to the golf rules and can be used as a golf club that can be used by a wide range of golf players. By adjusting the same golf club, it can be widely used as a golf club in the optimum state including official competitions.

It is a vertical sectional perspective view of the golf club head of the 1st Embodiment of this invention. It is a vertical sectional view of the golf club head of this embodiment. It is a cross-sectional view of the golf club head of this embodiment. It is a vertical sectional view of the golf club head of the 2nd Embodiment of this invention. It is sectional drawing of the golf club head of the 2nd Embodiment of this invention. It is a vertical sectional view of the golf club head of the third embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 show the golf club head of the first embodiment of the present invention, and the golf club head 10 of this embodiment has a face surface member 12 constituting a face surface 12a for hitting a ball and a rear side thereof. It is composed of a head body 14 provided.

The face surface 12a is a surface for hitting a ball, and a face surface member 12 such as a β-type titanium alloy formed by forging is joined to the opening of the head body 14 by welding or the like. The thickness of the face surface member 12 can be appropriately set in the range of 1.8 mm to 3.2 mm. For example, when the high resilience is set, the range is preferably 1.8 mm to 2.0 mm, and conversely, when the rigidity is set high to increase the strength, the range may be 3.0 mm to 3.2 mm. A plurality of groove-shaped score lines 12c are formed on the back surface 12b of the face surface member 12 in the horizontal direction when the golf club 10 is held at the time of hitting a ball.

The head body 14 is hollow and integrally cast, and is made of a titanium alloy such as 6-4 titanium (Ti-6Al-4V) or 811 titanium. The wall thickness of the head body 14 is, for example, 1.0 to 1.7 mm, and can be appropriately set to a different thickness depending on the portion. In the case of a driver head, for example, the volume of the golf club head 10 of this embodiment is set to ^{460 cm 3 which is within the regulation value range.} The sole portion 14a, which is the lower surface of the head body 14, is formed with a recess 16 for attaching and operating the shaft-shaped member 20, which will be described later.

The recess 16 of the sole portion 14a is formed in a shape obtained by cutting the central portion of the sole portion 14a into an L-shaped cross section, and is formed on the mounting surface 16a of the side surface of the L-shaped cross section facing parallel to the face surface 12a. A mounting hole 22 for inserting the shaft-shaped member 20 is formed. The mounting surface 16a and the mounting hole 22 of the recess 16 are formed at substantially the center of gravity of the head body 14. The mounting hole 22 is formed integrally with the head body 14 in a tubular shape so as to face the face surface 12a in a direction perpendicular to the face surface 12a, and a female screw 22a is formed on the inner peripheral surface. The female screw 22a is provided so that the male screw 20a of the shaft-shaped member 20 can be screwed.

The shaft-shaped member 20 is preferably a metal columnar member, and a bolt on which a male screw 20a is formed can be used. Alternatively, a male screw 20a may be formed with a constant length in the vicinity of the head portion 20b of the shaft-shaped member 20 of the metal column. An adjustment groove 20c for position adjustment, which will be described later, is provided on the outer end surface of the head portion 20b. In the shaft-shaped member 20, the male screw 20a is screwed into the female screw 22a of the mounting hole 22 formed in the recess 16, and the head portion 20b of the shaft-shaped member 20 is exposed on the outside of the mounting surface 16a of the recess 16. The shaft-shaped member 20 is provided so that the position can be adjusted by rotating the shaft-shaped member 20 from the outside.

The tip portion 20d of the shaft-shaped member 20 is provided facing the center of the back surface 12b of the face surface member 12, and the tip portion 20d of the shaft-shaped member 20 faces the center portion of the back surface member 12 with a predetermined gap W. ing. The gap W with the back surface 12b is smaller than the amount of deflection when the face surface member 12 bends toward the head body 14 when the golf ball is hit by the golf club head 10 without the shaft-shaped member 20. The gap W is set at intervals of, for example, about the thickness of the face surface member 12, and is 2.0 mm to 3.0 mm, about ± 30% of the thickness of the face surface member 12, and preferably about ± 20%. For example, the gap W is set to about 2.5 mm, and the gap W can be increased or decreased by adjusting the position by rotating the shaft-shaped member 20 by the adjusting groove 20c. The adjustment range from which a good effect can be obtained is about ± 30%, preferably about ± 20%, of the thickness of the face surface member 12. If the value of the gap W is narrower than the above value, the effect of bending of the face surface member 12 is small, the repulsive force by the face surface member 12 cannot be sufficiently obtained, and if it is wider than the above value, the face surface member 12 Even if it is bent by the hit ball, it does not collide with the shaft-shaped member 20, and the repulsive force from the shaft-shaped member 20 cannot be obtained.

The longitudinal direction of the shaft-shaped member 20 is arranged in a direction perpendicular to the back surface 12b of the face surface member 12, and the back surface 12b of the shaft-shaped member 20 collides with the tip end portion 20d of the shaft-shaped member 20 at the time of hitting a ball. The bending causes the shaft-shaped member 20 to be compressed in the axial direction. The compressed shaft-shaped member 20 is provided so that the repulsive force from the elastically compressed state acts on the face surface member 12 at right angles, and the repulsive force is reliably transmitted to the ball at the time of hitting.

A shaft mounting pipe portion 30 is integrally formed by casting on the heel portion 14b of the head body 14. The shaft mounting pipe portion 30 is a bottomed tubular portion to which the shaft 32 is inserted and fixed. Further, a weight mounting hole 34 for selectively mounting a weight (not shown) for balance adjustment is formed on the left and right sides of the sole portion 14a of the head body 14. The weight mounting hole 34 is also bottomed and integrally cast.

In the method of manufacturing the golf club head 10, the face surface member 12 is forged into a plate shape having a predetermined shape with various β-type titanium alloys and the like, and the thickness and shape are adjusted. The head body 14 is cast using 6-4 titanium, 811 titanium, or the like to form a hollow predetermined shape, and the shape is adjusted. Further, the mounting hole 22 of the recess 16 is threaded to form a female screw 22a. After that, the face surface member 12 is welded to the opening on the face side of the head body 14. Welding is performed by bringing the entire circumference of the face surface member 12 into contact with the entire circumference of the peripheral edge of the opening of the head body 14. After that, the welded portion is polished to prepare the surface, and necessary treatment such as painting the surface is performed.

Next, the shaft-shaped member 20 is screwed into the mounting hole 22 of the recess 16 and mounted so that the tip portion 20d of the shaft-shaped member 20 faces the back surface 12b of the face surface member 12 with a gap W. The value of the gap W is initially set to, for example, 2.5 mm, and is adjusted according to the skill level and preference of the user after the user purchases the golf club.

For example, when the gap W is widened, the amount of deflection of the face surface member 12 increases, and the amount of compression and contraction of the axial member 20 after colliding with the axial member 20 decreases. In this case, the depth of the center of gravity of the golf club head 10 becomes large. Such adjustment is suitable for a user with a relatively slow head speed, and the repulsion due to the deflection of the face surface member 12 becomes relatively large, and the repulsion due to the compression of the shaft-shaped member 20 is also added, so that the ball is hit. Along with increasing the ball speed, the deep center of gravity provides a high trajectory and extends the flight distance.

On the other hand, in the case of a user having a relatively high head speed, the gap W is adjusted so as to be narrow, the amount of deflection of the face surface member 12 at the time of hitting is suppressed, and after the face surface member 12 collides with the shaft-shaped member 20. The amount of compression and contraction of the shaft-shaped member 20 of the above is relatively increased. In this case, the depth of the center of gravity of the golf club head 10 becomes smaller. As a result, even for a hard hitter user with a high head speed, the repulsion due to the deflection of the face surface member 12 and the repulsion of the compression of the shaft-shaped member 20 are effectively added to increase the ball speed at the time of hitting and to make the ball shallow. Due to the depth of the center of gravity, it is possible to prevent the hit ball from rising more than necessary and extend the flight distance. Moreover, cracking of the face surface member 12 can be prevented.

In the golf club of this embodiment, the tip portion 20d of the shaft-shaped member 20 faces the inner surface 12b of the face surface member 12 with a gap W inside the golf club head 10. Therefore, when the golf club hits the ball, the ball is hit. The bent face surface member 12 collides with the tip portion 20d of the metal columnar shaft-shaped member 20, and the shaft-shaped member 20 is compressed by the impact energy. The repulsive force of the shaft-shaped member 20 at the time of compression is instantaneously transmitted to the golf ball via the face surface member 12, and the ball speed of the golf ball is increased. In particular, since the tip portion 20d of the shaft-shaped member 20 is separated from the back surface 20b of the face surface member 20 by the gap W, the repulsive force due to the relatively flexible bending of the face surface member 12 and the relatively hard shaft shape The repulsive force due to the compression of the member 20 acts instantly with high responsiveness, and is effectively transmitted from the face surface 12a to the ball. Moreover, since the shaft-shaped member 20 is not in constant contact with the face surface member 12, it does not violate the golf rules and can be used in official competitions.

Further, the deflection of the face surface member 12 at the time of hitting a ball is limited by colliding with the shaft-shaped member 20, and the impact force from the face surface member 12 acts to compress the shaft-shaped member 20 in the axial direction. Therefore, while preventing the face surface member 12 from cracking, the repulsive force due to the bending of the face surface member 12 and the compression of the shaft-shaped member 20 acts on the hitting ball to increase the hitting speed.

Conventionally, in order to increase the spring effect due to the repulsive force from the face surface member 12, the face surface member 12 has been thinned to increase the deflection of the face surface 12, so that the deflection of the face surface member 12 does not return. The ball jumped away from the face surface 12a, and a sufficient repulsive force could not be obtained. This problem was especially present in the case of hard hitters with high head speeds. Further, in the case of a hard hitter, if the face surface member 12 is made thin, there is a problem that the face surface member 12 is easily cracked.

On the other hand, in the case of the golf club head 10, the bending of the face surface member 12 at the time of hitting is limited by the shaft-shaped member 20, and the repulsion due to the bending of the face surface member 12 is compressed by the shaft-shaped member 20 and its structure. It is supplemented by repulsion. As a result, the responsiveness of the face surface member 12 to the deflection and the return of the deflection can be enhanced, the repulsive force from the face surface 12a to the ball can be effectively transmitted, and the speed of the ball at the time of hitting can be improved. is there. Further, it is possible to prevent the face surface member 12 from being destroyed.

In addition, the golf club head 10 can also adjust the depth of the center of gravity of the golf club head 10 by adjusting the position of the shaft-shaped member 20, and when the gap W is made small and the depth of the center of gravity is made shallow, the trajectory of the hit ball is reduced. It is possible to increase the ball speed without increasing the height, and as mentioned above, it becomes a golf club for advanced players with a large head speed. On the contrary, if the gap W is increased and the depth of the center of gravity is increased, the hit ball can be easily raised, and the golf club can be made more suitable for beginners.

The golf club of this embodiment is a golf club that conforms to the rules, and can form a golf club that can accommodate a wide range of golf players. Furthermore, even if the user does not buy a new golf club according to the improvement of his / her skill, by adjusting the same golf club, it can be used for a wide range of long periods including official competitions as a golf club in the optimum state. it can.

Next, the golf club head 40 of the golf club according to the second embodiment of the present invention will be described with reference to FIGS. 4 and 5. The golf club head 40 of this embodiment has the same configuration as the golf club head 10 of the first embodiment, and the tip of the shaft-shaped member 20 is made of resin such as vinyl chloride or silicone resin, or synthetic rubber or the like. An elastic member 42 made of rubber such as natural rubber or silicon rubber is provided. The elastic member 42 faces the central portion of the back surface 12b of the face surface member 12 with a predetermined gap W as in the above embodiment. The shape of the elastic member 42 is formed in a conical shape in which the outer diameter becomes smaller toward the tip, and the tip is rounded.

In the shaft-shaped member 20 provided with the elastic member 42, the male screw 20a is screwed into the female screw 22a of the mounting hole 22 formed in the recess 16, and the head of the adjusting member 20 is outside the surface 16a of the recess 16. 20b is exposed, and the adjusting member 20 is rotated from the outside so that the position can be adjusted.

According to the golf club head 40 of this embodiment, the same effect as that of the above embodiment can be obtained, and even for a user having a relatively slow head speed, the elastic member 42 is instantly compressed and repelled at the time of hitting the ball. The ball speed can be improved.

Next, the golf club head 44 of the golf club according to the third embodiment of the present invention will be described with reference to FIG. The golf club head 44 of this embodiment has the same configuration as the golf club head 10 of the first embodiment, and flange-shaped stopper portions 24 are concentrically provided in the middle portion of the shaft-shaped member 20. Further, a fitting portion 26 on which a coil-shaped spring member 46, which is an elastic member, is mounted is formed at the tip in the protruding direction. In addition to the flange shape, the stopper portion 24 may be a step portion or a protrusion formed so that the fitting portion 26 is located outside the spring member 46 and comes into contact with the spring member 46 at a predetermined position.

In the shaft-shaped member 20 to which the spring member 46 is fitted, the male screw 20a is screwed into the female screw 22a of the mounting hole 22 formed in the recess 16, and the head of the adjusting member 20 is outside the surface 16a of the recess 16. 20b is exposed, and the adjusting member 20 is rotated from the outside so that the position can be adjusted.

The tip of the spring member 46 faces the central portion of the back surface 12b of the face surface member 12 with a predetermined gap W as in the above embodiment. The spring member 46 is a hard spring having a large elastic modulus, and the length may be as short as possible, and the mass may be as small as possible.

According to the golf club head 44 of this embodiment, the same effect as that of the above embodiment can be obtained, and even for a user having a relatively slow head speed, the instantaneous compression and repulsion of the spring member 46 at the time of hitting the ball can cause the golf club head 44 to have the same effect. The ball speed can be improved.

The golf club of the present invention is not limited to the above embodiment, and the metal material, shape, and mass of the shaft-shaped member can be appropriately set. The shape of the face surface member and the head body, the thickness and material of each part can be appropriately set, and the type of titanium or titanium alloy can be appropriately selected. For example, as the β-type titanium alloy, Ti-22V-4Al alloy, Ti-13V-11Cr-3Al alloy, Ti-11.5Mo-6Zr-4.5Sn alloy, Ti-15Mo-3Cr-3Sn-3Al, etc. may be used. , Other titanium alloys may be used. Further, the material and shape of the elastic member are not limited. The head body may be formed by a forged structure in which a plurality of parts are formed and welded by forging other than casting, and the number of constituent parts can be appropriately set.

10, 40, 44 Golf club head 12 Face surface member

12a Face surface

12b Back surface 14 Head body 16 Recession 20 Shaft-shaped member 20a Male screw 20b Head 20c Adjustment groove 20d Tip 22 Mounting hole 22a Female screw 30 Shaft mounting pipe 32 Shaft 42 Elastic member 46 Spring member

Claims

A golf club including a golf club head having a hollow metal head body having an opening on the face surface side and a face surface member joined to the opening on the face surface side of the head body to form a face surface. ,
In a state where the face surface member is integrally joined to the head body, a shaft-shaped member facing the center of the back surface of the face surface member is provided in the head body.
The tip portion of the shaft-shaped member faces the central portion of the back surface of the face surface member with a predetermined gap, and the face surface member flexes in the gap when a golf ball is hit by the golf club head. Therefore, the back surface is at an interval where collision is possible.
The central axis of the axial member is located in a direction perpendicular to the back surface of the face surface member, and the axial member is provided so that its position can be adjusted in the central axial direction.
A golf club provided with a golf club head provided so that a force in the compression direction acts on the shaft-shaped member due to the collision of the face surface member when the golf ball is hit.
The golf club according to claim 1, wherein the shaft-shaped member is a metal pillar and is provided so as to cross the position of the center of gravity of the golf club head.
The golf club according to claim 1, wherein the gap is set at an interval of about the thickness of the face surface member.
The first or second aspect of the present invention, wherein the shaft-shaped member has a male screw, and the male screw is screwed into a female screw of a recess formed in the sole portion of the head body so that the position can be adjusted. Golf club.
The male screw is screwed into the female screw of the mounting hole formed in the recess, and the head of the shaft-shaped member is exposed in the recess, and the position of the shaft-shaped member is provided by the head. The golf club according to claim 4, which is provided so as to be adjustable.
An elastic member is provided at a portion of the tip of the shaft-shaped member facing the center of the back surface of the face surface member, and the elastic member faces the center of the back surface with a predetermined gap. The golf club according to any one of claims 1 to 5.
The golf club according to claim 6, wherein the elastic member is made of resin or rubber.
The golf club according to claim 6, wherein the elastic member is a metal spring.