CN111888739B

CN111888739B - Golf club head and golf club

Info

Publication number: CN111888739B
Application number: CN202010190839.1A
Authority: CN
Inventors: 山田理欧
Original assignee: Yamaha Corp
Current assignee: Yamaha Corp
Priority date: 2019-04-18
Filing date: 2020-03-18
Publication date: 2022-07-01
Anticipated expiration: 2040-03-18
Also published as: CN111888739A; JP7255334B2; KR102398790B1; KR20200122997A; JP2020174904A

Abstract

The invention provides a golf club head capable of controlling the deformation of a face portion at the time of ball impact and increasing the flight distance. A golf club head (2) according to one embodiment of the present invention includes a hollow head main body (11) having a face portion (12), the head main body (11) having, on an inner surface thereof, a rib (13) that is separated from the face portion (12) and extends in a direction along an outer edge of the face portion (12), and an average distance between the rib (13) and the face portion (12) is 2mm to 20 mm.

Description

Golf club head and golf club

Technical Field

The present invention relates to a golf club head and a golf club.

Background

For a wood type golf club head having a hollow head body, it is desirable that the rebound performance be large so as to be able to increase the flying distance of a hit ball. In order to increase the flight distance of a conventional shot, it is effective to increase the deflection of the club face portion.

From such a viewpoint, it is proposed to provide a reinforcing rib which is plate-shaped in the heel-and-toe (toe-heel) direction behind the shaft connecting portion on the inner surface of the hollow head (see japanese patent laid-open publication No. 2000-176056).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-176056

Disclosure of Invention

Problems to be solved by the invention

The wood club described in the above publication has the reinforcing rib, so that deformation of the club head rearward of the reinforcing rib is suppressed at the time of impact of the ball, and the energy of the impact is consumed by the deformation of the face portion. Thus, the wood club can effectively flex the club face, and the initial speed of a shot can be increased by utilizing the deformation of the club face, thereby increasing the flight distance of the shot.

However, in this publication, the face portion is only required to be deflected at the time of impact, and no study has been made on the relationship between the deformed shape of the face portion and the increase in the flight distance.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a golf club head and a golf club capable of increasing a flight distance of a hit ball by controlling a deformation operation of a face portion at the time of a ball impact.

Means for solving the problems

In order to solve the above problem, a golf club head according to an aspect of the present invention includes a hollow head body having a face portion, the head body having a rib on an inner surface thereof, the rib being separated from the face portion and extending in a direction along an outer edge of the face portion, and an average distance between the rib and the face portion being 2mm or more and 20mm or less.

The rib may be formed at a position where a radius of curvature of the inner surface is smallest at least in a direction along an outer edge of the face portion.

The rib may be formed on the entire circumference of the inner surface.

Preferably, the inclination of the side surface of the rib facing the face portion with respect to a tangential plane to the face center of the face portion is 20 ° or less.

The head body may have a shaft mounting portion on an inner surface thereof, and the rib may be connected to the shaft mounting portion.

The shaft mounting portion may also serve as a part of the rib.

The head main body may have a sole portion extending rearward from a lower edge of the face portion, and a weight provided on an inner surface of the sole portion, and the weight may also serve as a part of the rib.

A golf club according to another aspect of the present invention includes the golf club head.

In the present invention, "front" of the head body means a side of the head body which is impacted, and "rear" means a side opposite thereto. The term "face surface" means a range in which the radius of curvature of the front surface of the head body is 100mm or more. The "radius of curvature" is a radius of curvature of a cut edge (excluding irregularities due to a face groove or the like) in a vertical section (a section including a normal line at a measurement point) parallel to a direction in which the curvature is maximum. In addition, the "face portion" refers to a portion having the face surface at the front. The "face center" refers to a vertical center position of the face surface at a center position between both ends of the face surface in the horizontal direction (heel-and-toe direction). The "average interval of the rib from the face portion" refers to an average of the minimum interval and the maximum interval of the rib from the face portion. In addition, the "maximum interval of the rib from the face portion" refers to an interval in which the minimum distance between the rib and the face portion is the largest.

Effects of the invention

The present inventors have made extensive studies and found that the flight distance of a hit ball can be increased by suppressing the spread of the face portion toward the outer peripheral edge side at the time of impact of the ball. In the golf club head according to one aspect of the present invention, since the rib extending in the direction along the outer edge of the face portion is provided on the inner surface of the head body and the average distance between the rib and the face portion is within the above range, the spread of the face portion toward the outer edge side at the time of ball impact can be suppressed, and the flight distance of the hit ball can be increased.

Drawings

Fig. 1 is a front view showing a mode of a golf club according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of the golf club head of fig. 1 taken along a plane perpendicular to the front-to-rear direction.

Fig. 3 is a cross-sectional view of the golf club head of fig. 1 taken along line a-a.

Fig. 4 is a sectional view of the golf club head of fig. 1 taken along a vertical plane passing through the face center and orthogonal to a tangential plane to the face center.

Fig. 5 is a cross-sectional view corresponding to fig. 2 showing a golf club head according to an embodiment different from the golf club head of fig. 1.

Fig. 6 is a cross-sectional view corresponding to fig. 3 showing a golf club head according to an embodiment different from the golf club heads of fig. 1 and 5.

Fig. 7 is a cross-sectional view of the golf club head according to the embodiment different from the golf club heads of fig. 1, 5, and 6, corresponding to fig. 2.

Fig. 8 is a cross-sectional view corresponding to fig. 2 showing a golf club head according to an embodiment different from the golf club heads of fig. 1 and 5 to 7.

Fig. 9 is a cross-sectional view corresponding to fig. 4, showing a golf club head according to an embodiment different from the golf club heads of fig. 1 and 5 to 8.

Description of the reference numerals

1 Golf club

2. 20, 30, 40, 50, 60 golf club head

3 bar body

11. 21, 31, 41, 51 club head main body

12 face part

12a, 62 face surface

12b face center

13. 23, 33, 43, 53, 63 Ribs

13a, 23a, 33a first part

13b side surface

14 bottom

15 crown part

16 side part

17. 67 shaft mounting part

17a shaft insertion part

34 weight

43a hole

Tangent plane of X-ray face center

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings as appropriate.

[ first embodiment ]

< Golf club >

The golf club 1 of fig. 1 includes a golf club head 2 and a shaft 3 connected to the golf club head 2. The golf club head 2 itself constitutes an embodiment of the present invention.

< Golf club head >

The golf club head 2 is a wood type golf club head. As shown in fig. 2 to 4, the golf club head 2 includes a hollow head main body 11 having a face portion 12. The head body 11 is, for example, a metal wood head, and contains metal such as titanium as a main component. The face portion 12 constitutes the front wall of the head main body 11. The face portion 12 has a face surface 12a on the front thereof. The face surface 12a constitutes an impact surface against which a golf ball collides.

The head main body 11 has, on its inner surface, a rib 13 that is apart from the face portion 12 and extends in a direction along the outer edge of the face portion 12. The rib 13 is disposed behind the face portion 12 apart from the face portion 12. The head body 11 includes a sole portion 14 extending rearward from a lower edge of the face portion 12, a crown portion 15 extending rearward from an upper edge of the face portion 12, and side portions 16 extending rearward from a pair of left and right side edges of the face portion 12 and disposed between the sole portion 14 and the crown portion 15. The head main body 11 has a shaft attachment portion 17 on its inner surface. The shaft mounting portion 17 is provided on the heel-side inner surface of the head main body 11. The shaft mounting portion 17 has a cylindrical shaft insertion portion 17a protruding inward of the inner surface of the head main body 11. The shaft insertion portion 17a extends in the vertical direction on the heel side of the head main body 11.

(Rib)

The rib 13 is connected to the shaft mounting portion 17. Specifically, the rib 13 has a first portion 13a in the form of an elongated plate that is curved in the longitudinal direction along the inner surface of the head body 11, and the first portion 13a is connected to the shaft mounting portion 17. In the golf club head 2, the shaft attachment portion 17 protrudes toward the inner surface side of the head main body 11, and the first portion 13a is connected to the shaft attachment portion 17, so that the rib 13 can be easily disposed at a position close to the face portion 12.

The rib 13 has the first portion 13a and a second portion connecting both ends of the first portion 13 a. The second portion is constituted by the shaft mounting portion 17, more specifically, the shaft insertion portion 17 a. That is, the golf club head 2 doubles as the shaft mounting portion 17 as a part of the rib 13. Since the shaft mounting portion 17 of the golf club head 2 also serves as a part of the rib 13, the first portion 13a is not formed on the inner surface of the shaft mounting portion 17. In the golf club head 2, the shaft mounting portion 17 also serves as a part of the rib 13, and thus, an increase in weight due to the provision of the rib 13 can be suppressed. In addition, this makes it easy to dispose a weight in another part and to adjust the weight balance.

The first portion 13a extends across the sole 14, crown 15 and side 16 of the toe side. The first portion 13a is C-shaped in the main view. The cross-sectional shape of the first portion 13a in the direction perpendicular to the longitudinal direction is not particularly limited, but is, for example, a rectangular shape, more specifically, a substantially rectangular shape.

The height H of the first portion 13a may be uniform or may be locally different. As the lower limit of the average height of the first portion 13a, 3mm is preferable, and 5mm is more preferable. On the other hand, as the upper limit of the average height, 20mm is preferable, and 10mm is more preferable. If the average height does not satisfy the lower limit, there is a fear that deformation of the head main body 11 at the time of ball impact cannot be sufficiently suppressed. On the contrary, if the average height exceeds the upper limit, there is a fear that the weight of the head main body 11 becomes unnecessarily large. The "average height" refers to a value obtained by averaging the maximum value and the minimum value of the height H.

As the upper limit of the maximum height of the first portion 13a, 20mm is preferable, and 15mm is more preferable. If the maximum height exceeds the upper limit, the weight of the head main body 11 may become unnecessarily large.

From the viewpoint of suppressing deformation of the head main body 11 at the time of ball impact, a greater effect is expected to be obtained by increasing the height H of the first portion 13a than by increasing the thickness T of the first portion 13 a. Therefore, it is preferable that the thickness T of the first portion 13a is smaller than the height H of the first portion 13 a.

The thickness T of the first portion 13a may be uniform or may be locally different. As the lower limit of the average thickness of the first portion 13a, it is preferably 0.5mm, more preferably 0.7 mm. On the other hand, as the upper limit of the average thickness, 3.0mm is preferable, and 1.0mm is more preferable. If the average thickness does not satisfy the lower limit, there is a fear that deformation of the head main body 11 at the time of ball impact cannot be sufficiently suppressed. Conversely, if the average thickness exceeds the upper limit, there is a concern that the weight of the head main body 11 will unnecessarily increase. The "average thickness" refers to a value obtained by averaging the maximum value and the minimum value of the thickness T.

The face 12 side surface 13b of the first portion 13a is preferably flat. By making the side surface 13b flat in this manner, the first portion 13a can be easily brought close to the face portion 12 over the entire region in the longitudinal direction thereof.

As described above, the rib 13 extends in the direction along the outer edge of the face portion 12. In other words, the ribs 13 extend in a direction across the sole 14, crown 15, and side 16. The area of the first portion 13a located above the face portion 12 is preferably parallel to the upper edge of the face portion 12 in the heel-and-toe direction. The area of the first portion 13a located below the face portion 12 is preferably parallel to the lower edge of the face portion 12 in the heel-and-toe direction. In addition, the regions of the first portion 13a located above and below the face portion 12 are preferably parallel to the tangent plane X of the face center 12b in the heel-and-toe direction. In the present specification, "parallel" means that the angle formed by both is 10 ° or less, preferably 5 ° or less, and more preferably 3 ° or less.

The lower limit of the average distance D between the rib 13 and the face portion 12 is 2mm, preferably 3 mm. On the other hand, the upper limit of the average distance D is 20mm, preferably 10mm, and more preferably 5 mm. If the average distance D does not satisfy the lower limit, a part of the rib 13 may be connected to the face portion 12 or the like, and the rib 13 may not be easily formed. On the other hand, if the average distance D exceeds the upper limit, there is a fear that the expansion of the face portion 12 toward the outer peripheral edge side at the time of ball impact cannot be sufficiently suppressed.

The rib 13 is preferably formed at a position where the radius of curvature of the inner surface of the head main body 11 is smallest at least in the direction along the outer edge of the face portion 12. Specifically, for example, the rib 13 is preferably formed at a position where the radius of curvature of the inner surface of the head main body 11 is smallest on a plane cut by a virtual plane parallel to the tangent plane X of the face center 12 b. The position where the radius of curvature is smallest is provided, for example, on the inner surface of the side portion 16. The position where the radius of curvature is smallest is likely to be deformed at the time of impact of the ball, and therefore, the face portion 12 is likely to be urged to expand toward the outer peripheral edge side. In contrast, by forming the rib 13 at the position where the radius of curvature is smallest, deformation of the portion at the time of ball impact is easily suppressed, and the stem surface portion 12 is suppressed from spreading to the outer peripheral edge side.

The rib 13 is formed on the entire circumference of the inner surface of the head main body 11. In the golf club head 2, the rib 13 is formed on the entire circumference of the inner surface of the head main body 11, so that the position of the outer edge of the face portion 12 is easily fixed at the time of ball impact, and the spread of the face portion 12 to the outer edge side can be more reliably suppressed.

As shown in fig. 4, the upper limit of the inclination (inclination in the height direction) α of the side surface of the rib 13 facing the face portion 12 (more specifically, the side surface 13b of the first portion 13a facing the face portion 12) with respect to the tangential plane X of the face center 12b of the face portion 12 is preferably 20 °, more preferably 15 °, and still more preferably 10 °. On the other hand, the lower limit of the inclination α can be set to 0 °. When the inclination α is 0 °, the side surface 13b of the first portion 13a facing the face portion 12 can be parallel to the tangential plane X. If the inclination α exceeds the upper limit, it may be difficult to suppress the spread of the face portion 12 toward the outer peripheral edge.

The rib 13 has rigidity such that deformation of the head body 11 at the time of ball impact can be suppressed. The rib 13 is made of metal, for example, as a main component. The ribs 13 are of the same material as the sole 14, crown 15 and side 16, and are preferably integrally formed therewith. In particular, the ribs 13 are preferably cast, for example, integrally with the sole 14, crown 15 and side 16. Thereby, the effect of suppressing deformation of the rib 13 on the head main body 11 is easily obtained.

On the other hand, the ribs 13 may be attached to the sole 14, the crown 15, and the side 16 by welding or the like. The first member 13a may be formed by fitting the inner circumferential surfaces of the bottom portion 14, the crown portion 15, and the side portion 16 from the front. In the case where the first portion 13a is formed by embedding, the first portion 13a may also be bonded to the inner peripheral surfaces of the sole 14, the crown 15, and the side portions 16 by an adhesive.

< advantage >

As a result of extensive studies, the present inventors have found that it is effective to suppress the extension of the face portion 12 toward the outer peripheral edge side at the time of impact of a ball and to suppress the spread of force applied in the impact direction in order to increase the flight distance of a hit ball. In the golf club head 2, the rib 13 extending in the direction along the outer edge of the face portion 12 is provided on the inner surface of the head body 11, and the average distance D between the rib 13 and the face portion 12 is within the above range, so that the face portion 12 can be prevented from spreading toward the outer peripheral edge side at the time of ball impact. This increases the rebound performance, increases the initial velocity of the shot, reduces the spin amount, and increases the flight distance of the shot.

Since the golf club 1 includes the golf club head 2, the flight distance of a shot can be increased.

[ second embodiment ]

< Golf club head >

The golf club head 20 of fig. 5 may be used in place of the golf club head 2 of fig. 1. The golf club head 20 includes a hollow head main body 21 having a face portion. The head body 21 of this golf club head 20 has, on its inner surface, a rib 23 that is apart from the face portion and extends in a direction along the outer edge of the face portion. The average distance between the rib 23 and the face portion is 2mm to 20 mm.

The golf club head 20 can have the same configuration as the golf club head 2 of fig. 1, except that the strength of the rib 23 is increased in a region including a position where the radius of curvature of the inner surface of the head main body 21 is smallest in a direction along the outer edge of the face portion. Therefore, only the differences between the rib 23 and the rib 3 of fig. 1 will be described below.

The height of the rib 23 in a region including a position where the radius of curvature of the inner surface of the head main body 21 is smallest in a direction along the outer edge of the face portion is larger than that in other regions. For example, the height of the rib 23 is locally large in a region including a position where the radius of curvature of the inner surface of the head main body 21 is smallest on a plane cut by a virtual plane parallel to the tangent plane of the face center 1 of the face portion. In the present embodiment, the height of the rib 23 at the inner surface of the side portion 16 of the head main body 21 is larger than the height of the other portions.

< advantage >

In the direction along the outer edge of the face portion, a region including a position where the radius of curvature of the inner surface of the head main body 21 is smallest is easily deformed at the time of impact of a ball. In the golf club head 20, the height of the rib 23 is increased in a portion that is easily deformed at the time of ball impact, whereby the deformation of the portion at the time of ball impact can be more reliably suppressed, and the face portion can be further suppressed from spreading toward the outer peripheral edge side.

In the golf club head 20, the shaft attachment portion 17 is disposed as a second portion of the rib 23 on the heel side portion 16 where the radius of curvature of the inner surface of the head main body 21 is reduced in the direction along the outer edge of the face portion. The shaft mounting portion 17 is bifurcated in the front-rear direction from the first portion 23a, and the strength becomes relatively large. Therefore, in the golf club head 20, the rib 23 can increase the strength of both end sides of the head body 21 in the heel-and-toe direction, and the expansion of the face portion toward the outer peripheral side can be more easily suppressed.

[ third embodiment ]

< Golf club head >

The golf club head 30 of fig. 6 may be used in place of the golf club head 2 of fig. 1. The golf club head 30 includes a hollow head main body 31 having a face portion 12. The head main body 31 of the golf club head 30 has, on its inner surface, a rib 33 that is away from the face portion 12 and extends in a direction along the outer edge of the face portion 12. The average distance between the rib 33 and the face portion 12 is 2mm to 20 mm.

The head main body 31 has a sole 14 extending rearward from the lower edge of the face portion 12, and a weight 34 provided on the inner surface of the sole 14. The golf club head 30 can have the same configuration as the golf club head 2 of fig. 1 except that the head main body 31 includes the weight 34. Therefore, only the weight 34 will be described below.

The weight 34 adjusts the weight balance of the golf club head 30 by being disposed on the inner surface of the sole 14. The weight 34 is made of, for example, metal, and is preferably formed integrally with the bottom 14 from the same material as the bottom 14. The specific shape of the weight 34 is not particularly limited, but may be, for example, a substantially rectangular parallelepiped shape.

The weight 34 doubles as a part of the rib 33. Specifically, the weight 34 is continuously provided rearward from the rear side surface of the first portion 33a of the rib 33 disposed on the inner surface of the bottom portion 14. In this way, the weight 34 is continuously provided rearward from the rear side surface of the first portion 33a, and the side surface of the first portion 33a facing the face portion 12 is held as one surface.

< advantage >

In the golf club head 30, the weight 34 also serves as a part of the rib 33 (that is, the rib 33 includes the weight 34), and thus the rib 33 can have a function of suppressing expansion of the face portion 12 toward the outer peripheral side at the time of ball impact in addition to the weight balance adjustment function of the golf club head 30. Therefore, the golf club head 30 can increase the flight distance of the shot.

[ fourth embodiment ]

< Golf club head >

The golf club head 40 of fig. 7 may be used in place of the golf club head 2 of fig. 1. The golf club head 40 includes a hollow head main body 41 having a face portion. The head body 41 of this golf club head 40 has, on its inner surface, a rib 43 that is apart from the face portion and extends in a direction along the outer edge of the face portion. The average distance between the rib 43 and the face portion is 2mm to 20 mm.

The rib 43 has one or more holes 43a penetrating in the thickness direction. The golf club head 40 may have the same configuration as the golf club head 2 of fig. 1 except that the rib 43 has one or more holes 43 a.

One or more holes 43a can be formed at any position of the rib 43. However, the one or more holes 43a are preferably provided at positions where it is difficult to reduce the function of suppressing the expansion of the face portion 12 toward the outer peripheral edge side at the time of ball impact. From this viewpoint, the one or more holes 43a are preferably provided on the inner side of the position where the radius of curvature of the inner surface of the head main body 41 is large, for example, in the direction along the outer edge of the face portion.

< advantage >

The rib 43 of the golf club head 40 has one or more holes 43a, so that the weight of the rib 43 can be reduced. In addition, the golf club head 40 can adjust the weight balance of the golf club head 40 by adjusting the arrangement of the one or more holes 43 a.

[ other embodiments ]

The embodiment does not limit the configuration of the present invention. Therefore, the above-described embodiments may omit, replace, or add components of each part of the embodiments based on the description of the present specification and common technical knowledge, and all of them should be construed as belonging to the scope of the present invention.

The golf club head may not necessarily have the rib formed on the entire circumference of the inner surface of the head main body. In the golf club head 50 of fig. 8, a rib 53 is formed only at a portion where the radius of curvature of the inner surface of the head main body 51 becomes smaller in the direction along the outer edge of the face portion. With this configuration, the face portion can be prevented from spreading toward the outer peripheral edge side at the time of ball impact while suppressing an increase in the weight of the golf club head 50.

The rib may not necessarily be connected to the shaft mounting portion in the golf club head. The rib 63 of the golf club head 60 of fig. 9 is disposed between the shaft mounting portion 67 and the face portion 62 separately from the shaft mounting portion 67. With this configuration, the rib 63 can be provided closer to the rod surface portion 62.

In this golf club head, even when the rib is connected to the shaft mounting portion, the shaft mounting portion may not double as a part of the rib. For example, the first portion may be formed on the inner surface of the shaft mounting portion.

The arrangement of the ribs can be set in accordance with the shape of the golf club head. The rib may be configured not to be formed at a position where the radius of curvature of the inner surface of the head main body is smallest in a direction along the outer edge of the face portion.

The height, thickness, etc. of the ribs may also be shaped locally to adjust the weight balance of the golf club head. In the second embodiment, the structure in which the rib height is locally increased to locally increase the rib strength has been described, but the golf club head may locally increase the rib thickness to locally increase the rib strength. However, from the viewpoint of enhancing the effect of suppressing the deformation of the head main body per unit mass, it is preferable to increase the height of the rib rather than the thickness of the rib.

The golf club head may be provided with projections and depressions on an outer surface of the head main body. The unevenness affects the ease of deformation of the head body at the time of ball impact. Therefore, in the case where the golf club head has the unevenness formed on the outer surface of the head body, it is preferable to adjust the strength of the rib in consideration of the influence of the unevenness on the deformation of the head body.

Industrial applicability of the invention

As described above, the golf club head according to one embodiment of the present invention is suitable for increasing the ball flight distance.

Claims

1. A golf club head is characterized by comprising a hollow club head body having a face portion, a sole portion, a crown portion, and a side portion between the sole portion and the crown portion,

the head body has, on an inner surface thereof, a rib which is separated from the face portion and extends in a direction along an outer edge of the face portion and which includes at least a region of the side portion,

the average distance between the rib and the face portion is 2mm to 20mm,

the rib is formed on the whole circumference of the inner surface of the head main body,

the face portion is the portion having the face surface on the front face,

the face surface is in a range of 100mm or more in a curvature radius of a front surface of the head body,

the average interval of the rib from the face portion is an average of a minimum interval and a maximum interval of the rib from the face portion, and the maximum interval of the rib from the face portion is an interval in which a minimum distance between the rib and the face portion is maximum.

2. The golf club head according to claim 1,

the side portion is formed at a position where a radius of curvature of the inner surface is minimum.

3. The golf club head according to claim 1,

the ribs extend across the sole, side, crown of the club head body.

4. The golf club head according to claim 3,

the rib is formed on the entire circumference of the inner surface.

5. The golf club head according to any one of claims 1 to 4,

the inclination of the face of the rib facing the face portion with respect to a tangential plane to the face center of the face portion is 20 DEG or less,

the face center is a vertical center position of the face surface at a center position between both horizontal ends of the face surface.

6. The golf club head according to any one of claims 1 to 4,

the head body has a shaft mounting part on an inner surface thereof, and the rib is connected to the shaft mounting part.

7. The golf club head according to claim 6,

the shaft mounting portion doubles as a part of the rib.

8. The golf club head according to any one of claims 1 to 4,

the head main body has a sole portion extending rearward from a lower edge of the face portion and a weight provided on an inner surface of the sole portion,

the weight doubles as a part of the rib.

9. A golf club provided with the golf club head according to any one of claims 1 to 8.