JP2012045234A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head allowing achievement of equalization of a carry even if striking points are uneven.SOLUTION: This hollow golf club head 1A is formed with a plurality of thick parts 21a-21f extended toward a back part 60 side facing to a face part 10 side from the face part 10 side of a ball striking face, in a crown part 20A of the upper face. Rigidity of the plurality of thick parts 21a-21f become larger as going to a toe part 50 side facing to a heel part 40 side from the heel part 40 side installed with a shaft.

Description

  The present invention relates to a golf club head.

  In a golf club, a wood such as a driver has a hollow head. In Patent Document 1, by providing a thick portion near the center in the toe-heel direction of the rear portion of the crown portion, even if an amateur golfer whose hit points are likely to vary is used, the flight distance is increased on average. A golf club head capable of achieving the above is disclosed.

JP 2008-93268 A

  In recent years, it has been desired for golf clubs to achieve uniform flight distance in addition to increasing 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 capable of realizing uniform flight distance even if the hit points vary.

  In order to solve the above-described problems, the present invention provides a hollow golf club head having a plurality of thicknesses extending from the face side of the ball striking surface toward the back side facing the face side on the crown portion of the upper surface. A thick portion is formed, and the rigidity of the plurality of thick portions is configured to increase from a heel side to which the shaft is attached to a toe side facing the heel side.

  When a user swings a golf club equipped with a head and hits a ball in the heel side hitting area of the head, the crown of the heel side hitting area has a relatively low rigidity. Controls that the face portion stands by rotating in the direction of the ball hitting the center, that is, it can be suppressed that the loft angle of the face portion is reduced and the ball launch angle is lowered, and the ball is hit in the center hitting area. A launch angle close to the case can be realized.

  On the other hand, when the user swings a golf club equipped with a head and hits in the toe side hitting region of the head, the crown portion of the toe side hitting region is relatively high in rigidity. In other words, it is possible to suppress an increase in the ball launch angle due to an increase in the loft angle of the face portion, and a launch angle close to that when the ball is hit in the center hitting region can be realized.

  The plurality of thick portions may be configured such that the widths of the thick portions increase from the heel side toward the toe side.

  The thickness of the plurality of thick portions may be configured to increase from the heel side toward the toe side.

  A back side thick portion extending from the heel side to the toe side is formed at the back side end portion of the crown portion, and the face side end portion of the back side thick portion is formed from the heel side to the toe side. The back side thick part may be connected to the plurality of thick parts.

  The widths of the plurality of thin portions formed respectively between the adjacent thick portions may be configured to decrease from the heel side toward the toe side.

  The thicknesses of the plurality of thin portions formed between the adjacent thick portions may be configured to increase from the heel side toward the toe side.

  Further, the present invention is a hollow golf club head, wherein the rigidity of the crown portion on the upper surface is configured to increase from the heel side to which the shaft is attached to the toe side facing the heel side. It is characterized by.

  When a user swings a golf club with a head and hits the heel side hitting area of the head, the heel side hitting area has a relatively low rigidity, so the head hits the head about the shaft axis. It is possible to control that the face portion stands by rotating in the direction, that is, it can be suppressed that the loft angle of the face portion becomes small and the ball launch angle becomes low, which is close to the case where the ball is hit in the center hitting area. The launch angle can be realized.

  On the other hand, when the user swings a golf club equipped with a head and hits the toe side hitting area of the head, the head controls the deflection of the crown portion because the toe side hitting area is relatively high in rigidity. That is, an increase in the ball launch angle due to an increase in the loft angle of the face portion can be suppressed, and a launch angle close to that when a ball is hit in the center hitting region can be realized.

  A face-side thick portion extending from the heel side to the toe side may be formed at the face-side end portion of the crown portion.

  According to such a configuration, it is possible to suppress local deformation of the crown portion at the time of hitting, and to realize stable hitting directivity.

  According to the present invention, it is possible to suppress the ball launch angle from becoming lower or higher due to variations in the hitting ball position, so that the flight distance can be made uniform.

  Further, according to the present invention, by providing a plurality of thin portions, it is possible to reduce the weight of the crown portion and increase the degree of freedom in designing the head. Furthermore, according to the present invention, the weight of the crown can be reduced, so that the center of gravity can be lowered, the launch angle of the ball at the time of hitting the ball can be increased as a whole, and the flight distance can be improved.

  In addition, according to the present invention, by providing the back side thick portion, it is possible to suppress the ball launch angle from becoming lower or higher due to variations in the hit ball position, so that the flight distance can be made uniform. Can be realized.

  In addition, according to the present invention, it is possible to suppress the crown portion from being locally bent at the time of hitting, and to realize a stable hitting directivity.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the golf club which concerns on 1st embodiment of this invention, (a) is a top view, (b) is X1 arrow sectional drawing of (a). It is a figure which shows the golf club which concerns on 2nd embodiment of this invention, (a) is a top view, (b) is X2 arrow sectional drawing of (a). It is a figure which shows the golf club which concerns on 3rd embodiment of this invention, (a) is a top view, (b) is X3 arrow sectional drawing of (a). It is a figure which shows the golf club which concerns on 4th embodiment of this invention, (a) is a top view, (b) is X4 arrow sectional drawing of (a). It is a figure which shows the golf club which concerns on 5th embodiment of this invention, (a) is a top view, (b) is X5 arrow sectional drawing of (a). It is a figure which shows the golf club which concerns on 6th embodiment of this invention, (a) is a top view, (b) is X6 arrow sectional drawing of (a). It is a figure which shows the golf club which concerns on 7th embodiment of this invention, (a) is a top view, (b) is X7 arrow sectional drawing of (a).

  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 head of the present invention is applied to a right-handed wood.

<First embodiment>
As shown in FIG. 1, a golf club head (hereinafter simply referred to as “head”) 1A according to a first embodiment of the present invention is made of metal and has a hollow shape, and collides with a ball at the time of a shot. A front face portion 10, an upper crown portion 20A having a convex shape upward, a lower sole portion 30 facing the crown portion 20A, and a heel portion 40 on a proximal side (shaft side) side portion; The front side toe 50 facing the heel 40, the rear back 60 facing the face 10, and the space formed by the face 10, crown 20 A and heel 40. An upper neck portion 70.

  The head 1A is formed by welding the face portion 10, the crown portion 20A, the integrally formed sole portion 30, the heel portion 40, the toe portion 50, the back portion 60, and the neck portion 70. Further, a hole 71 is formed in the neck portion 70. A shaft (not shown) is attached to the hole 71.

Here, a range of 20 mm in total, for example, 10 mm left and right in FIG. 1 including the face center 11 of the hitting surface of the face 10 is the center hitting area 12 _C , and the right side of the center hitting area 12 _C (the heel 40 side). ) Of 20 mm, for example, is the heel side hitting ball region 12 _H , and the range of, for example, 20 mm on the left side (toe portion 50 side) of the center hitting ball region 12 _C is the toe side hitting ball region 12 _T. The center hitting area 12 _C , the heel side hitting area 12 _H and the toe side hitting area 12 _T constitute an effective hitting area 12.

  Further, the area wider than the left and right including the effective hit ball area 12 of the hitting surface of the face portion 10 is a score line forming area 13 in which score lines are formed.

  The crown portion 20A is a plate-like member integrally formed of the same metal material, and includes a plurality of thick portions 21 (in this embodiment, six thick portions 21a to 21a parallel to each other and extending in the front-rear direction). 21f), a plurality of thin portions 22 (in this embodiment, seven thin portions 22a to 22g extending in the front-rear direction parallel to each other), a face-side thick portion 23, and a welding allowance 24.

  The plurality of thick portions 21 a to 21 f are rib-like thick portions that are sequentially arranged from the heel portion 40 side to the toe portion 50 side and extend from the face portion 10 side to the back portion 60. The plurality of thick portions 21a to 21f are formed so as to protrude to the lower surface side (the hollow side of the head 1A) of the crown portion 20A. The plurality of thick portions 21a to 21f are formed to have the same thickness. The thick portion 21d is provided at a position where the head width of the head 1A (the distance between the face portion 10 and the back portion 60) is maximized.

  The plurality of thick portions 21b to 21f only need to extend at least the same length around the highest point 14 of the crown portion 20A toward the face portion 10 side and the back portion 60 side. In the case of 90 to 110 mm, the plurality of thick portions 21 b to 21 f only have to be configured to exhibit a length of at least 50 to 80 mm. According to such a configuration, it is possible to reduce stress concentration on the end portion in the direction of the face portion 10 and the back portion 60, and to flex the crown portion 20A efficiently. Moreover, since the strength of the crown portion 20A is improved, the crown portion 20A can be reduced in thickness and weight.

  The plurality of thin portions 22 a to 22 g are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are extended between the plurality of thick portions 21 and the welding allowance 24. The plurality of thin portions 22a to 22g are formed to have the same thickness and are thinner than the plurality of thick portions 21a to 21f.

  The face-side thick portion 23 extends from the end portion of the crown portion 20 </ b> A on the face portion 10 side along the face portion 10 and the neck portion 70. The face-side thick portion 23 is formed so as to protrude to the lower surface side of the crown portion 20A (the hollow side of the head 1A). The tip of the face side thick portion 23 on the face portion 10 side also serves as a welding allowance for the face portion 10 and the neck portion 70. The face-side thick portion 23 is formed thicker than the plurality of thick portions 21a to 21f.

  The welding allowance 24 is extended along the heel part 40, the back part 60, and the toe part 50 at the heel part 40, the back part 60, and the toe part 50 side end part of the crown part 20A. The welding allowance 24 has a width of 1 to 5 mm and is formed to have the same thickness as the plurality of thick portions 21a to 21f.

The plurality of thick portions 21 and the plurality of thin portions 22 are formed from the heel portion 40 side to the toe portion 50 side, with a thin portion 22a, a thick portion 21a, a thin portion 22b, a thick portion 21b, a thin portion 22c, and a thick portion. 21c, the thin part 22d, the thick part 21d, the thin part 22e, the thick part 21e, the thin part 22f, the thick part 21f, and the thin part 22g are provided in this order. Width _{t 1} of the thick portion 21a (heel 40- toe portion 50 direction of the length), the width _{T 2} of the thin-walled portion 22b, the width _{t 2} of the thick portion 21b, the width _{T 3} of the thin portion 22c, the thick portion 21c width t ₃ , thin portion 22d width T ₄ , thick portion 21d width t ₄ , thin portion 22e width T ₅ , thick portion 21e width t ₅ , thin portion 22f width T ₆ , thick portion width _{t 6} parts 21f is 2: 8: 3: 7: 4: 6: 6: 6: 7: 5: 9 are set to be.

Here, the width _{T n} of width _{t n} and the thin portions 22 of the respective thick portion 21 (21a~21f) (22b~22f) is set so as to satisfy the following relationship.
t _{n + 1} > t _n (including a case where a pair of adjacent widths are equal)
T _{n + 1} <T _n (including the case where a pair of adjacent widths are equal)
T _{n <T n} and t _n at the heel portion 40 side than the face portion center 11 _{<T n + 1}
T _n ≧ the toe portion 50 side than the face portion center 11 _{T n} and t _n ≧ _{T n + 1}

  The rigidity of the plurality of thick portions 21 increases as the width increases (widens). That is, since the width of the plurality of thick portions 21a to 21f increases from the heel portion 40 side toward the toe portion 50 side, the rigidity of the plurality of thick portions 21a to 21f increases from the heel portion 40 side to the toe portion 50. It gets bigger as you go to the side. With this configuration, the rigidity of the crown portion 20A of the head 1A is relatively small on the heel portion 40 side and relatively large on the toe portion 50 side.

  Further, since the width of the plurality of thin portions 22 becomes smaller (narrower) from the heel portion 40 side to the toe portion 50 side, the rigidity of the head 1A is relatively small on the heel portion 40 side, and on the toe portion 50 side. It becomes relatively large.

Since when the user hitting heel side hitting region 12 _H of the head 1A and swinging a golf club with head 1A is the crown portion 20A of the heel side hitting region 12 _H is relatively low rigidity, the head 1A Controls that the head 1A rotates in the direction of the ball about the shaft axis when the ball is hit and the face portion 10 stands, that is, the loft angle of the face portion 10 becomes small and the ball launch angle becomes low. can be suppressed, it is possible to realize a launch angle close when hitting the center hitting area 12 _C.

Meanwhile, since the user when hitting with toe side hitting area 12 _T of the head 1A and swinging a golf club with head 1A is the crown portion 20A of the toe-side hitting area 12 _T is relatively high rigidity, head 1A controls the deflection of the crown portion 20A at the time of hitting, i.e., increases the loft angle of the face portion 10 can be prevented from becoming higher launch angle of the ball, and hitting the center hitting area 12 _C A launch angle close to the case can be realized.

  Since the head 1A according to the first embodiment of the present invention can suppress the ball launch angle from becoming lower or higher due to variations in the hitting position, the flight distance can be made uniform. it can.

  Moreover, since the head 1A according to the first embodiment of the present invention includes the face-side thick portion 23 formed along the face portion 10, the crown portion 20A is locally bent at the time of hitting. This can be suppressed, and a stable hitting directivity can be realized.

  Further, since the head 1A according to the first embodiment of the present invention includes the plurality of thin portions 22a to 22g, the weight of the crown portion 22A can be reduced, and the design flexibility of the head 1A can be increased. . Furthermore, since the head 1A according to the first embodiment of the present invention can reduce the weight of the crown portion 22A, the center of gravity is lowered, the overall launch angle of the ball at the time of hitting is increased, and the flight distance is increased. Improvement can be realized.

  Moreover, since the center of gravity of the head 1A according to the first embodiment of the present invention is arranged on the toe part 50 side, the moment of inertia is increased, the behavior of the head 1A is stabilized, and a stable hitting directivity is realized. be able to.

<Second Embodiment>
Next, the head according to the second embodiment of the present invention will be described with reference to FIG. 2, focusing on differences from the head 1 </ b> A according to the first embodiment.

  As shown in FIG. 2, the head 1B according to the second embodiment of the present invention includes a crown portion 20B instead of the crown portion 20A, and the crown portion 20B further includes a back-side thick portion 25B. The back-side thick portion 25B is extended along the back portion 60 at the end on the back portion 60 side of the crown portion 20B. The back side thick portion 25B is formed so as to protrude to the lower surface side (the hollow side of the head 1B) of the crown portion 20B. The back side thick portion 25B is formed to have the same thickness as the plurality of thick portions 21a to 21f. The end on the face portion 10 side of the back side thick portion 25B is formed substantially parallel to the face portion 10, and the lengths of the plurality of thick portions 21b to 21f are substantially the same, and the head width is 50 to 50%. 70%.

  Since the head 1B according to the second embodiment of the present invention includes the back-side thick portion 25B, the length that the crown portion 20B bends can be shortened. The energy transmission loss of bending can be reduced and the crown part 20B can be bent efficiently.

<Third embodiment>
Next, a head according to the third embodiment of the present invention will be described with reference to FIG. 3 focusing on differences from the head 1A according to the first embodiment.

  As shown in FIG. 3, the head 1C according to the third embodiment of the present invention includes a crown portion 20C instead of the crown portion 20A, and the crown portion 20C includes a plurality of thick portions 21a to 21e, A plurality of thin portions 22a to 22f.

The plurality of thick portions 21a to 21e are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are formed to have the same thickness and the same width. Thick portion 21b is disposed so as to include the center of the heel-side hitting area 12 _H, the thick portion 21c is arranged so as to include the center of the center hitting area 12 _C, the thick portion 21d is It is arranged so as to include the center of the toe-side hitting area 12 _T.

  The plurality of thin portions 22a to 22f are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are formed to have the same thickness, and the plurality of thin portions 22b to 22e are formed to have the same width. Has been.

  The crown portion 20C further includes a back-side thick portion 25C. The back-side thick portion 25C is extended along the back portion 60 at the end on the back portion 60 side of the crown portion 20C. The back-side thick portion 25C is formed so as to protrude to the lower surface side (the hollow side of the head 1C) of the crown portion 20C. The back side thick portion 25C is formed to have the same thickness as the plurality of thick portions 21a to 21e. The end of the back side thick portion 25C on the face portion 10 side is formed so as to approach the face portion 10 from the heel portion 40 side to the toe portion 50 side, and the length of the plurality of thick portions 21b to 21e. Is formed so as to become shorter from the heel portion 40 side toward the toe portion 50 side. With this configuration, the rigidity of the crown portion 20C of the head 1C is relatively small on the heel portion 40 side and relatively large on the toe portion 50 side.

  Since the head 1C according to the third embodiment of the present invention includes the back-side thick portion 25C, similarly to the head 1A according to the first embodiment, the ball launch angle is low due to variations in the hit ball position. Since it is possible to suppress the increase or decrease in the height, it is possible to achieve uniform flight distance.

<Fourth embodiment>
Next, a head according to the fourth embodiment of the present invention will be described with reference to FIG. 4 focusing on differences from the head 1A according to the first embodiment.

  As shown in FIG. 4, the head 1D according to the fourth embodiment of the present invention includes a crown portion 20D instead of the crown portion 20A, and the crown portion 20D includes a plurality of thick portions 21a to 21e, A plurality of thin portions 22a to 22f.

The plurality of thick portions 21a to 21e are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are formed to have the same width. Thick portion 21b is disposed so as to include the center of the heel-side hitting area 12 _H, the thick portion 21c is arranged so as to include the center of the center hitting area 12 _C, the thick portion 21d is It is arranged so as to include the center of the toe-side hitting area 12 _T. The thicknesses of the plurality of thick portions 21a to 21e are formed so as to increase from the heel portion 40 side toward the toe portion 50 side. With this configuration, the rigidity of the crown portion 20D of the head 1D is relatively small on the heel portion 40 side and relatively large on the toe portion 50 side.

  The plurality of thin portions 22a to 22f are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are formed to have the same thickness, and the plurality of thin portions 22b to 22e are formed to have the same width. Has been.

  Since the head 1D according to the fourth embodiment of the present invention includes a plurality of thick portions 21a to 21e, the launch angle of the ball due to variations in the hit ball position, similar to the head 1A according to the first embodiment. Can be prevented from becoming lower or higher, so that the flight distance can be made uniform.

<Fifth embodiment>
Subsequently, a head according to a fifth embodiment of the present invention will be described with reference to FIG. 5 focusing on differences from the head 1A according to the first embodiment.

  As shown in FIG. 5, the head 1E according to the fifth embodiment of the present invention includes a crown portion 20E instead of the crown portion 20A, and the crown portion 20E includes a plurality of thick portions 21a to 21e, A plurality of thin portions 22a to 22f.

The plurality of thick portions 21a to 21e are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are formed to have the same width. Thick portion 21b is disposed so as to include the center of the heel-side hitting area 12 _H, the thick portion 21c is arranged so as to include the center of the center hitting area 12 _C, the thick portion 21d is It is arranged so as to include the center of the toe-side hitting area 12 _T. The plurality of thick-walled portions 21a to 21e are formed by fixing a plurality of thin-plate-like members having different rigidity and made of different materials to a flat plate-like member constituting the thin-walled portions 22a to 22f of the crown portion 20E by welding or the like. The rigidity is increased as it goes from the heel part 40 side to the toe part 50 side. With this configuration, the rigidity of the crown portion 20E of the head 1E is relatively small on the heel portion 40 side and relatively large on the toe portion 50 side.

  The plurality of thin portions 22a to 22f are sequentially arranged from the heel portion 40 side to the toe portion 50 side, and are formed to have the same thickness, and the plurality of thin portions 22b to 22e are formed to have the same width. Has been.

  Since the head 1E according to the fifth embodiment of the present invention includes a plurality of thick portions 21a to 21e, the launch angle of the ball due to variations in the hit ball position, similar to the head 1A according to the first embodiment. Can be prevented from becoming lower or higher, so that the flight distance can be made uniform.

<Sixth embodiment>
Next, a head according to the sixth embodiment of the present invention will be described with reference to FIG. 6 focusing on differences from the head 1A according to the first embodiment.

  As shown in FIG. 6, a head 1F according to a sixth embodiment of the present invention includes a crown portion 20F instead of the crown portion 20A. The crown portion 20F includes a plurality of thick portions 21a to 21f and a plurality of thick portions 21a to 21f. Instead of the thin-walled portions 22a to 22g, a plurality of regions 26a to 26e are provided.

The plurality of regions 26a to 26e are disposed in order from the heel portion 40 side to the toe portion 50 side, and the thickness of the plurality of regions 26a to 26e increases as the heel portion 40 side increases toward the toe portion 50 side. Is formed. Region 26b is disposed so as to include the center of the heel-side hitting area 12 _H, region 26c is disposed so as to include the center of the center hitting area 12 _C, area 26d is toe-side hitting area 12 It arrange | positions so that the center of _T may be included. With this configuration, the rigidity of the crown portion 20F of the head 1F is relatively small on the heel portion 40 side and relatively large on the toe portion 50 side.

  The face-side thick portion 23 is thicker than the thickest region 26e among the plurality of regions 26a to 26e, and the welding allowance 24 is formed to have the same thickness as the region 26e. In addition, the welding allowance 24 may be formed in the step shape slightly thick (for example, 0.2 [mm]) rather than the some area | regions 26a-26e.

  Since the head 1F according to the sixth embodiment of the present invention includes the plurality of regions 26a to 26e, the ball launch angle is low due to variations in the hit ball position, similar to the head 1A according to the first embodiment. Since it is possible to suppress the increase or decrease in the height, it is possible to achieve uniform flight distance.

<Seventh embodiment>
Next, the head according to the seventh embodiment of the present invention will be described with reference to FIG. 7 focusing on differences from the head 1A according to the first embodiment.

  As shown in FIG. 7, the head 1G according to the seventh embodiment of the present invention includes a crown portion 20G instead of the crown portion 20A. The crown portion 20G includes a plurality of thick portions 21a to 21f and a plurality of thick portions 21a to 21f. Instead of the thin-walled portions 22a to 22g, a plurality of regions 27a to 27c are provided.

The plurality of regions 27a to 27c are arranged in order from the heel portion 40 side to the toe portion 50 side, and the rigidity of the plurality of regions 27a to 27c increases as the heel portion 40 side increases toward the toe portion 50 side. Is formed. Region 27a is arranged so as to include the center of the heel-side hitting area 12 _H, region 27b is arranged so as to include the center of the center hitting area 12 _C, region 27c is toe-side hitting area 12 It arrange | positions so that the center of _T may be included. With this configuration, the rigidity of the crown portion 20G of the head 1G is relatively small on the heel portion 40 side and relatively large on the toe portion 50 side.

  In the present embodiment, the face side thick portion 23, the region 27b, and the portion adjacent to the region 27b of the welding allowance 24 are integrally formed of, for example, Ti-15V-3Cr-3Sn-3Al and have a thickness of 96 to 105 [GPa]. The region 27a and the portion adjacent to the region 27a of the welding allowance 24 exhibit an elastic modulus, and are integrally formed of, for example, Ti-15Mo-5Zr-4V-4Al, exhibit an elastic modulus of 88 to 93 [GPa], and region 27c And the part adjacent to the area | region 27c of the welding allowance 24 is integrally formed, for example by Ti-6Al-4V, and exhibits the elasticity modulus of 105-115 [GPa], By fixing these three parts by welding etc. The crown part 20G is manufactured.

  In the present embodiment, the plurality of regions 27a to 27c are formed to have the same thickness, but the rigidity of the plurality of regions 27a to 27c is set to a suitable value by making the thicknesses of the plurality of regions 27a to 27c different. The structure set to may be sufficient. Moreover, the structure which sets the rigidity of several area | regions 27a-27c as mentioned above by forming the several area | regions 27a-27c with the same metal material, and performing the heat processing on different conditions to each may be sufficient.

  Since the head 1G according to the seventh embodiment of the present invention includes a plurality of regions 27a to 27c, the ball launch angle is low due to variations in the hit ball position, similar to the head 1A according to the first embodiment. Since it is possible to suppress the increase or decrease in the height, it is possible to achieve uniform flight distance.

Next, examples of the present invention will be described.
<Example>
As a head according to the example, a head 1A according to the first embodiment was created. Ti—Fe—O is adopted as the material of the crown portion 20A, and Ti-6Al-4V, Ti-15V-3Cr-3Sn-3Al, Ti—Fe—O—Si are used as materials of other portions such as the face portion 10 and the like. It selected suitably from titanium alloys, such as. In the crown portion 20A, the thick portions 21a to 21f have a thickness of 0.65 [mm], the thin portions 22a to 22g have a thickness of 0.35 [mm], and the face-side thick portion 23 has a thickness of 0.85 [mm]. ]. The volume of the head 1A according to the embodiment is 460 [cc], and the weight is 196 [g].

<Comparative Example 1>
As a head according to comparative example 1, a head having a constant thickness of 0.65 [mm] of the thick portions 21a to 21f and thin portions 22a to 22g of the head 1A according to the example was prepared. The volume of the head according to Comparative Example 1 is 460 [cc].
<Comparative example 2>
As a head according to Comparative Example 2, a head having a rib-like thick portion of the head 1A according to the example was formed at the face center with a width of 10 mm and a thickness of 0.65 [mm].
The volume of the head according to Comparative Example 2 is 460 [cc].

<Trial evaluation>
A shaft and a grip made of fiber reinforced resin were attached to the heads according to these Examples, Comparative Example 1 and Comparative Example 2, and trial hitting was performed by a robot at a head speed of 47.7 [m / s]. The hit point positions are the face center, the toe side hit point (from the face center to the toe side 20 [mm]), and the heel side hit point (from the face center to the heel part side 20 [mm]). The flight distance was measured.

  As shown in Table 1, the head 1A according to the example suppresses the variation in the flight distance by suppressing the variation in the launch angle due to the deviation of the hitting point, compared with the heads according to the comparative examples 1 and 2 (the flight distance). And the flight distance can be improved.

  The crown portion 20A has a thickness of 0.55 to 1.5 [mm] for the thick portions 21a to 21f, and a thickness of 0.3 to 0.7 [mm] for the thin portions 22a to 22g. The thickness of the part 23 can be set in the range of 0.7 to 1.5 [mm]. Further, when the thickness of the face-side thick portion 23 is 100, it is desirable to set the thickness of the thick portions 21a to 21f to 90 to 95 and the thickness of the thin portions 22a to 22g to 30 to 60. Further, it is possible to employ a titanium alloy other than Ti—Fe—O as the material of the crown portion 20A.

  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, in the heads 1A to 1E according to the first to fifth embodiments, the thickness of the plurality of thin portions 22a to 22g is formed so as to increase from the heel portion 40 side to the toe portion 50 side. It may be. Further, in the head 1F according to the sixth embodiment, the crown portion 20F may be configured such that the thickness of the crown portion 20F increases continuously from the heel portion 40 side toward the toe portion 50 side. The present invention is applicable not only to driver heads with a volume of 250 [cc] or more, but also to fairway wood and utility heads with a volume of less than 250 [cc].

1A to 1G Golf club head 20A to 20G Crown part 21a to 21f Thick part 22a to 22g Thin part 23 Face side thick part 25B, 25C Back side thick part

Claims (8)

A hollow golf club head,
A plurality of thick portions extending from the face side of the ball striking surface to the back side facing the face side are formed on the crown portion of the upper surface,
The golf club head according to claim 1, wherein the rigidity of the plurality of thick portions is configured to increase from a heel side to which the shaft is attached to a toe side facing the heel side. 2. The golf club head according to claim 1, wherein widths of the plurality of thick portions are configured to increase from the heel side toward the toe side. 2. The golf club head according to claim 1, wherein a thickness of each of the plurality of thick portions is configured to increase from the heel side toward the toe side. A back side thick part extending from the heel side to the toe side is formed at the back side end of the crown part,
The face side end of the back side thick part is configured to approach the face as it goes from the heel side to the toe side,
The golf club head according to claim 1, wherein the back-side thick portion is connected to the plurality of thick portions. The width of a plurality of thin portions formed respectively between the adjacent thick portions is configured to become smaller from the heel side toward the toe side. 5. The golf club head according to claim 4. The thickness of the some thin part formed in each between the said adjacent thick part is comprised so that it may become large as it goes to the said toe side from the said heel side. 5. The golf club head according to claim 4. A hollow golf club head,
The golf club head according to claim 1, wherein the rigidity of the crown portion on the upper surface is configured to increase from a heel side to which the shaft is attached to a toe side facing the heel side. The face side thick part extended from the heel side to the toe side is formed in the face side edge part of the said crown part. The Claim 1 characterized by the above-mentioned. Golf club head.

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