JP5785895B2 - Golf club head - Google Patents

Description

  The present invention relates to a golf club head.

  In general, golf clubs are desired to improve flight distance and directionality. In order to improve the flight distance, the golf club head preferably has high resilience over a wide range of the face portion. In order to improve directionality, it is preferable that the golf club head has a stable behavior when hit.

  For this reason, wood type golf club heads have been increased in capacity and reduced in center of gravity. Increasing the capacity contributes to the expansion of the high repulsion region and also contributes to the reduction of the relative amount of misalignment of the hitting points. Lowering the center of gravity contributes to an increase in the moment of inertia and contributes to an improvement in the stability of the behavior at the time of hitting.

  The ratio of the weight of the face portion to the total weight of the golf club head is very large. The weight reduction of the face portion is a big problem because it can be expected to be used for increasing the capacity of the surplus weight obtained thereby and lowering the center of gravity.

  The face portion of the golf club head is preferably thin for high resilience and light weight. On the other hand, a certain thickness is required to ensure sufficient strength. A face structure in which the central part of the face part is formed thicker than the peripheral part is known as a response to such a trade-off requirement. In addition to this, a face structure is also known in which a plurality of ribs extending from the central portion toward the outside are provided in order to improve rigidity.

  In addition, golf clubs that have a small decrease in flight distance due to hitting point deviation are generally preferred and desired by many people.

Japanese Patent Laid-Open No. 2002-331051 JP 2005-312954 A JP 2008-253564 A

  In the wood type golf club head, the center of gravity is relatively far away from the face portion. For this reason, it is known that the flying distance is reduced by the gear effect when the ball is hit with the core removed from the crown side or the sole side. Specifically, when the ball is hit on the sole side of the center of the face, that is, the sweet spot, the golf club head rotates from the crown side to the sole side around the center of gravity at the time of hitting. This will reduce the flight distance of the ball. On the contrary, when hitting on the crown side from the sweet spot, the golf club head rotates from the sole side to the crown side around the center of gravity at the time of hitting, so the backspin of the ball is reduced from an appropriate amount, The flight distance of the ball decreases.

  It is an object of the present invention to provide a golf club head in which a decrease in flight distance due to a gear effect when a ball is hit with the core removed from the crown side or the sole side is suppressed.

In the golf club head according to the present invention, the face portion includes a thick portion, at least a peripheral portion on the crown side and a peripheral portion on the sole side defined by the thick portion. The thick portion is located on the crown side of the first horizontal rib portion, the first horizontal rib portion extending in the toe-heel direction in the center of the face portion, and on the first horizontal rib portion A second horizontal rib portion extending in parallel; and a third horizontal rib portion positioned on the sole side of the first horizontal rib portion and extending in parallel with the first horizontal rib portion. Yes. The thick portion further includes two first upward inclined rib portions extending obliquely upward from both ends of the first horizontal rib portion, and obliquely downward outward from both ends of the first horizontal rib portion. Two first downwardly inclined rib portions extending inward, two second upwardly inclined rib portions extending obliquely upward outward from both ends of the second horizontal rib portion, and the third horizontal rib And two second downwardly inclined rib portions extending obliquely downward from both ends of the portion. The thickness of the first horizontal rib portion is smaller than both the thickness of the second horizontal rib portion and the thickness of the third horizontal rib portion.

  ADVANTAGE OF THE INVENTION According to this invention, the golf club by which the fall of the flight distance by the gear effect at the time of hitting with a core removed to a crown side or a sole side was suppressed is provided.

1 shows a golf club according to an embodiment. FIG. 2 is a plan view of the golf club head of FIG. 1 viewed from the face side. 3 shows a cross section of the golf club head of FIG. 2 along the line AA of FIG. 3 shows a cross-section of the golf club head of FIG. 2 along the line BB of FIG. FIG. 4 shows a cross section of the golf club head of FIG. 2 along the line CC in FIG. 3. 6 shows a cross section of the face portion along the line DD in FIG. 6 shows a cross section of the face portion along the line EE in FIG. 5. The behavior of the golf club head and the ball in an off-center hit is shown. 3 shows a cross-section of another structure of a golf club head according to an embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 shows a golf club 10 according to an embodiment. The golf club 10 is a wood club, and has a hollow golf club head 12, a shaft 14 connected to the golf club head 12, and a grip 16 provided at the end of the shaft 14 opposite to the golf club head 12. And. The golf club 10 is, for example, a driver wood club, a fairway wood club, or a utility club. The shaft 14 is made of, for example, fiber reinforced resin or steel. The grip 16 is formed of a flexible member such as rubber.

  The golf club head 12 shown in FIG. 1 is shown in FIG. The golf club head 12 is connected to a face portion 22 for hitting a ball, a crown portion 24 located on the upper side, a sole portion 26 located on the lower side of the crown portion 24, and a shaft 14 (see FIG. 1). A hosel portion 28 is provided. Here, the upper and lower positional relationship assumes a state in which the golf club head 12 is disposed at an appropriate lie angle and loft angle. The face portion 22, the crown portion 24, the sole portion 26, and the hosel portion 28 are connected to each other and constitute a hollow structure. The golf club head 12 is made of, for example, metal, and is formed of a titanium alloy or a stainless alloy. In the golf club head 12, it is sufficient that at least the face portion 22 and the sole portion 26 are made of metal, and other portions may be made of, for example, fiber reinforced resin. The golf club head 12 has a volume of 200 to 500 cc and a weight of 150 to 250 g, for example. The crown part 24 and the sole part 26 are formed thinner than the face part 22. The face portion 22 has a plurality of score lines 22s extending in parallel with each other in the toe-heel direction. Each score line 22 s is formed by a lateral groove carved in the face portion 22.

[Structure Example 1]
Hereinafter, a more specific structure of the golf club head 12 will be described. As an example of the golf club head 12 shown in FIGS. 1 and 2, a golf club head 12A having a cup-shaped face member is shown in FIGS.

  As shown in FIGS. 3 to 7, the golf club head 12 </ b> A includes a cup-shaped face member 32 and a head body 34. The edges of the face member 32 and the head main body 34 are aligned with each other, and are fixed to each other by a weld bead 36 formed over the entire circumference of the boundary. In this golf club head 12A, the face member 32 constitutes the face portion 22 shown in FIG.

  As shown in FIGS. 3 to 5, the face member 32 has a thick portion 42 and four peripheral portions 44 </ b> C, 44 </ b> S, 44 </ b> T, 44 </ b> H defined by the thick portion 42 in the face surface region 22 a. ing. Here, the face surface region 22a means a region that is assumed to hit the ball in a common sense in order to fly the ball forward, and includes the formation region of the score line 22s.

[Positional relationship of each part]
The center of the thick portion 42 substantially coincides with the sweet spot of the golf club head 12A. The thick portion 42 has a substantially “H” shape, and more specifically, has an “H” shape in which the upper end and the lower end spread outward.

  The four peripheral portions 44C, 44S, 44T, and 44H are partitioned by a substantially “H” -shaped thick portion 42, the peripheral portion 44T is located on the toe side of the thick portion 42, and the peripheral portion 44H is the wall portion. The thick part 42 is located on the heel side, the peripheral part 44C is located on the crown side of the thick part 42, and the peripheral part 44S is located on the sole side of the thick part 42.

  The thick portion 42 has a composite rib structure, and includes a plurality of ribs 52, 56C, 56S, tapered portions 54C, 54S positioned between the ribs 52, 56C, 56S, and ribs 52, 56C, 56S. It has tapered portions 58C, 58S, 58T, 58H located on the outside.

  The rib 52 extends along the contour of the thick portion 42. That is, the rib 52 has a substantially “H” shape like the thick portion 42, more specifically, an “H” shape with the upper end and the lower end spreading outward. Therefore, the rib 52 includes a horizontal rib portion 52a extending in a band shape in the toe-heel direction at the center of the face portion 22, and two inclined rib portions 52b extending obliquely upward from both ends of the horizontal rib portion 52a. , Two inclined rib portions 52c extending obliquely downward from both ends of the horizontal rib portion 52a are provided.

  The ribs 56 </ b> C are located on the crown side of the ribs 52 and extend along the ribs 52. More specifically, the rib 56C extends along the horizontal rib portion 52a and the two inclined rib portions 52b of the rib 52. That is, the rib 56 </ b> C has a substantially “U” shape, more specifically, a “U” shape with the upper end spreading outward. Accordingly, the rib 56C has a horizontal rib portion 56Ca extending in a band shape in the toe-heel direction and two inclined rib portions 56Cb extending obliquely upward outward from both ends of the horizontal rib portion 56Ca. The horizontal rib portion 56Ca extends substantially parallel to the horizontal rib portion 52a at a distance from the horizontal rib portion 52a. Each of the two inclined rib portions 56Cb extends substantially parallel to the two inclined rib portions 52b at a distance from the two inclined rib portions 52b.

  The rib 56S is located on the sole side of the rib 52 and extends along the rib 52. More specifically, the rib 56S extends along the horizontal rib portion 52a and the two inclined rib portions 52c of the rib 52. That is, the rib 56S has a substantially inverted “U” shape, more specifically, an inverted “U” shape with the lower end extending outward. Therefore, the rib 56S has a horizontal rib portion 56Sa extending in a band shape in the toe-heel direction and two inclined rib portions 56Sb extending obliquely downward from both ends of the horizontal rib portion 56Sa. The horizontal rib portion 56Sa extends substantially parallel to the horizontal rib portion 52a at a distance from the horizontal rib portion 52a. Each of the two inclined rib portions 56Sb extends substantially parallel to the two inclined rib portions 52c at a distance from the two inclined rib portions 52c.

  The tapered portion 54C extends between the rib 52 and the rib 56C. That is, the tapered portion 54 </ b> C has a substantially “U” shape, more specifically, a “U” shape with an upper end spreading outward.

  Further, the tapered portion 54S extends between the rib 52 and the rib 56S. That is, the tapered portion 54S has a substantially inverted “U” shape, more specifically, an inverted “U” shape with the lower end extending outward.

  The tapered portion 58C is located on the crown side of the rib 56C and extends along the rib 56C. That is, the tapered portion 58 </ b> C has a substantially “U” shape, more specifically, a “U” shape with an upper end spreading outward.

  The tapered portion 58S is located on the sole side of the rib 56S and extends along the rib 56S. That is, the tapered portion 58S has an approximately inverted “U” shape, more specifically, an inverted “U” shape with the lower end extending outward.

  The tapered portion 58 </ b> T is located on the toe side of the rib 52 and extends along the rib 52. More specifically, the tapered portion 58T extends along two inclined rib portions 52b and 52c located on the toe side. That is, the tapered portion 58T has a substantially “<” shape.

  The tapered portion 58 </ b> H is located on the heel side of the rib 52 and extends along the rib 52. More specifically, the tapered portion 58H extends along two inclined rib portions 52b and 52c located on the heel side. That is, the tapered portion 58H has a substantially inverted “<” shape.

[Thickness of each part]
The peripheral portions 44C, 44S, 44T, and 44H are formed relatively thin in order to expand the high resilience area and reduce the weight. The peripheral portions 44C, 44S, 44T, and 44H all have a substantially uniform thickness.

  The thick portion 42 is formed to be relatively thick in order to ensure the strength against impact upon hitting. The ribs 52, 56C, and 56S all have a substantially uniform thickness, and the thickness of the tapered portions 54C, 54S, 58C, 58S, 58T, and 58H changes monotonously.

As shown in FIG. 6, the thicknesses t ₁ , t ₂ , and t ₃ of the ribs 52, 56C, and 56S are all greater than the thicknesses t ₄ and t ₅ of the peripheral portions 44C and 44S, respectively. large. Thickness _{t 1} of the center rib 52 is smaller than the thickness _{t 2} of the crown side of the rib 56C, also smaller than the thickness _{t 3} of the sole side of the ribs 56S. Thickness _{t 2} and thickness _{t 3} of the sole side of the ribs 56S in the crown side of the rib 56C, for example, satisfy the relationship of _{t 2} ≧ _{t 3.} That is, the thickness _{t 2} of the crown side of the rib 56C is equal to the thickness _{t 3} of the sole side of the ribs 56S, greater than that. Further, the thickness _{t 5} of the peripheral portion 44S of the wall thickness _{t 4} and the sole side of the crown side of the peripheral portion 44C, for example, satisfy the relationship of _{t 4} ≧ _{t 5.} That is, the thickness t ₄ of the crown side of the peripheral portion 44C is equal to the thickness t ₅ of the peripheral portion 44S of the sole side, larger than that.

Furthermore, as shown in FIG. 7, the thickness t ₅ of the peripheral portion 44S of the sole side is greater than the thickness t ₆ of the toe side of the peripheral portion 44T. Although not shown, the thickness of the peripheral portion 44T of the heel side is substantially equal to the thickness t ₆ of the peripheral portion 44T of the toe side. In other words, also the thickness t ₅ of the peripheral portion 44S of the sole side, greater than the thickness of the peripheral portion 44T of the heel side.

In summary, the thicknesses t ₁ , t ₂ , t ₃ , t ₄ , t ₅ , and t ₆ of the ribs 52, 56C, 56S and the peripheral portions 44C, 44S, 44T (, 44H) are t ₂ ≧ The relation of t ₃ > t ₁ > t ₄ ≧ t ₅ > t ₆ is satisfied.

  Furthermore, the larger of the absolute value of the thickness difference between the rib 52 and the rib 56C and the absolute value of the thickness difference between the rib 52 and the rib 56S (that is, the absolute value of the thickness difference between the rib 52 and the rib 56C) 52 and the absolute value of the difference in thickness between the toe side peripheral portion 44T and the absolute value of the difference in thickness between the rib 52 and the peripheral portion 44H on the heel side are smaller than the smaller one.

That is, if here (not shown) the thickness of the peripheral portion 44H and _{t 7,} the ribs 52,56C, 56S and periphery 44C, 44S, 44T, each meat 44H thicknesses _{t 1,} t 2, _{t 3} , T ₄ , t ₅ , t ₆ , t ₇ are MAX (| t ₂ −t ₁ |, | t ₃ −t ₁ |) <MIN (| t ₁ −t ₆ |, | t ₁ −t ₇ | ) Satisfied relationship.

Tapered portion 54C is thick transition between the rib 52 and the rib 56C, the wall thickness of the tapered portion 54C is between the thickness _{t 2} of the thickness _{t 1} and the rib 56C of the ribs 52, monotonically, For example, it changes at a certain rate. That is, the tapered portion 54C has a tapered surface that connects the edges of the surfaces of the rib 52 and the rib 56C.

Tapered portion 54S is a thickness transition between the rib 52 and the rib 56S, the thickness of the tapered portion 54S is between the thickness _{t 1} and the thickness _{t 3} of the ribs 56S rib 52, monotonically, For example, it changes at a certain rate. That is, the tapered portion 54S has a tapered surface that connects the edges of the surfaces of the rib 52 and the rib 56S.

Tapered portion 58C is thick transition between the ribs 56C and the peripheral portion 44C, the wall thickness of the tapered portion 58C is between the thickness _{t 4} of the thickness _{t 2} and the peripheral part 44C of the rib 56C, monotonous For example, it changes at a constant rate. That is, the tapered portion 58C has a tapered surface that connects the edges of the surfaces of the rib 56C and the peripheral portion 44C.

Tapered portion 58S is a thickness transition between the ribs 56S and the peripheral portion 44S, the thickness of the tapered portion 58S is between the thickness _{t 5} of the wall thickness _{t 3} and the peripheral portion 44S of the ribs 56S, monotonous For example, it changes at a constant rate. That is, the tapered portion 58S has a tapered surface that connects the edges of the surfaces of the rib 56S and the peripheral portion 44S.

Tapered portion 58T is a thickness transition between the ribs 52 and the peripheral portion 44T, the thickness of the taper portion 58T is between the thickness _{t 6} of the thickness _{t 1} and the peripheral portion 44T of the ribs 52, monotonous For example, it changes at a constant rate. That is, the tapered portion 58T has a tapered surface that connects the edges of the surfaces of the rib 52 and the peripheral portion 44T.

Tapered portion 58H is a wall thickness transition between the ribs 52 and the peripheral portion 44H, the thickness of the tapered portion 58H is between the thickness of the thickness t ₁ and the peripheral portion 44H of the rib 52, monotonically, For example, it changes at a certain rate. That is, the tapered portion 58H has a tapered surface that connects the edges of the rib 52 and the peripheral portion 44H.

[Function and effect]
As shown in FIG. 8, the back spin S1 is applied to the ball B1 hit on the crown side from the center of the thick portion 42 of the face portion 22. At this time, the golf club head 12A rotates around the center of gravity G in the direction indicated by the arrow R1, that is, from the sole side to the crown side by the impact of the hit ball. Therefore, the ball B1 receives the rotational force H1 due to the gear effect by the golf club head 12A. This rotational force H1 acts in a direction to reduce the backspin S1 of the ball B1. This is a factor that reduces the back spin S1 of the ball B1 from an appropriate amount, inhibits the rise of the ball B1, and reduces the flight distance of the ball B1.

  In the golf club head 12A, the horizontal rib portion 52a extending in the toe-heel direction in the center of the thick portion 42 is formed thinner than the horizontal rib portion 56Ca on the crown side and the horizontal rib portion 56Sa on the sole side. For this reason, the face part 22 bends along the horizontal rib part 52a at the time of hitting. As a result, the ball B1 receives the rotational force F1 due to the gear effect of the face portion 22. This rotational force F1 acts in a direction to increase the backspin S1 of the ball B1. That is, the rotational force F1 suppresses an undesired decrease in the back spin S1 due to the gear effect of the golf club head 12A. Therefore, a decrease in the flight distance of the ball B1 due to the deviation of the hitting point toward the crown is suppressed to a small level.

  Further, the back spin S2 is applied to the ball B2 hit on the sole side with respect to the center of the thick portion 42 of the face portion 22. At this time, the golf club head 12A rotates around the center of gravity G in the direction indicated by the arrow R2, that is, from the crown side to the sole side by the impact of the hit ball. For this reason, the ball B2 receives the rotational force H2 due to the gear effect by the golf club head 12A. This rotational force H2 acts in a direction to increase the back spin S2 of the ball B2. This is a factor that excessively increases the back spin S2 of the ball B2, raises the ball B2 excessively, and consequently decreases the flight distance of the ball B2.

  In the golf club head 12A, the horizontal rib portion 52a extending in the toe-heel direction in the center of the thick portion 42 is formed thinner than the horizontal rib portion 56Ca on the crown side and the horizontal rib portion 56Sa on the sole side. For this reason, the face portion 22 bends along the horizontal rib portion 52a when the ball is hit, and the ball B2 receives a rotational force F2 due to the gear effect of the face portion 22. This rotational force F2 acts in a direction to reduce the back spin S2 of the ball B2. That is, the rotational force F2 suppresses an undesired increase in the back spin S2 due to the gear effect of the golf club head 12A. Therefore, a decrease in the flight distance of the ball B2 due to the deviation of the hitting point toward the sole side is suppressed to a small level.

  As described above, in the golf club head 12A, an undesired increase and decrease in the backspin of the ball can be prevented even when the hitting point shifts to the crown side or the sole side. Since the spin is maintained at an appropriate amount, a decrease in flight distance due to the gear effect can be suppressed.

  In general, in a wood type golf club head, the vertical dimension of the face part (the dimension in the crown / heel direction) is smaller than the lateral dimension of the face part (the dimension in the toe-heel direction). For this reason, the resilience of the face portion tends to be lower on the toe-heel side than on the crown-heel side.

  Further, the lateral dimension of the face portion is large on the crown side and small on the sole side. For this reason, the resilience of the face portion tends to be lower on the sole side than on the crown side.

  In contrast, in the golf club head 12A, the toe side peripheral portion 44T and the heel side peripheral portion 44H are thinner than any of the thick portion 42, the crown side peripheral portion 44C, and the sole side peripheral portion 44S. Since it is formed, the reduction in resilience on the toe-heel side is satisfactorily suppressed. In other words, the high repulsion region is expanded on the toe side and the heel side.

  Further, in the golf club head 12A, the thickness of the peripheral portion 44C on the crown side is equal to or greater than the thickness of the peripheral portion 44S on the sole side, and the thickness of the rib 56C on the crown side is It is equal to or larger than the thickness of the side rib 56S. Thereby, the tendency for the resilience of the face portion to be lower on the sole side than on the crown side is suppressed.

  Therefore, in the golf club 10 provided with the golf club head 12A, both the flight distance decrease due to the rebound reduction due to the hit point deviation and the flight distance decrease due to the gear effect are suppressed.

[Structural Example 2]
As another example of the golf club head 12 shown in FIGS. 1 and 2, a golf club head 12B having a plate-like face member is shown in FIG.

  As shown in FIG. 9, the golf club head 12 </ b> B includes a plate-like face member 62 and a head body 64. The face member 62 is formed slightly smaller than the face portion 22 shown in FIG. The face member 62 is fitted in an opening formed in the head main body 64, and is fixed to the head main body 64 by a weld bead 66 formed over the entire circumference of the boundary between the face member 62 and the head main body 64. In the golf club head 12 </ b> B, the face portion 22 shown in FIG. 2 includes a face member 62 and a part of the head main body 64.

  As shown in FIG. 9, the face member 62 has a thick portion 72 and four peripheral portions 74C, 74S, 74T, and 74H defined by the thick portion 72.

  The center of the thick portion 72 substantially coincides with the sweet spot of the golf club head 12B. The thick portion 72 has a substantially “H” shape, and more specifically, has an “H” shape in which the upper end and the lower end spread outward.

  The four peripheral portions 74C, 74S, 74T, and 74H are partitioned by a substantially “H” -shaped thick portion 72. The peripheral portion 74T is located on the toe side of the thick portion 72, and the peripheral portion 74H is the wall portion. The thick part 72 is located on the heel side, the peripheral part 74C is located on the crown side of the thick part 72, and the peripheral part 74S is located on the sole side of the thick part 72.

  The thick portion 72 has a composite rib structure, and includes a plurality of ribs 82, 86C, 86S, tapered portions 84C, 84S positioned between the ribs 82, 86C, 86S, and ribs 82, 86C, 86S. Tapered portions 88C, 88S, 88T, and 88H are located on the outside.

  The rib 82 extends along the contour of the thick portion 72. That is, the rib 82 has a substantially “H” shape like the thick portion 72, more specifically, an “H” shape in which the upper end and the lower end spread outward. Therefore, the rib 82 includes a horizontal rib portion 82a extending in a band shape in the toe-heel direction, two inclined rib portions 82b extending obliquely upward from both ends of the horizontal rib portion 82a, and the horizontal rib portion 82a. Two inclined rib portions 82c extending obliquely downward from both ends are provided.

  The rib 86 </ b> C is located on the crown side of the rib 82 and extends along the rib 82. More specifically, the rib 86 </ b> C extends along the horizontal rib portion 82 a and the two inclined rib portions 82 b of the rib 82. That is, the rib 86 </ b> C has a substantially “U” shape, more specifically, a “U” shape with the upper end spreading outward. Therefore, the rib 86C has a horizontal rib portion 86Ca extending in a band shape in the toe-heel direction and two inclined rib portions 86Cb extending obliquely upward outward from both ends of the horizontal rib portion 86Ca. The horizontal rib portion 86Ca extends substantially parallel to the horizontal rib portion 82a at a distance from the horizontal rib portion 82a. Each of the two inclined rib portions 86Cb extends substantially parallel to the two inclined rib portions 82b at a distance from the two inclined rib portions 82b.

  The rib 86 </ b> S is located on the sole side of the rib 82 and extends along the rib 82. More specifically, the rib 86S extends along the horizontal rib portion 82a and the two inclined rib portions 82c of the rib 82. That is, the rib 86S has a substantially inverted “U” shape, more specifically, an inverted “U” shape with the lower end spread outward. Accordingly, the rib 86S has a horizontal rib portion 86Sa extending in a band shape in the toe-heel direction and two inclined rib portions 86Sb extending obliquely downward from both ends of the horizontal rib portion 86Sa. The horizontal rib portion 86Sa extends substantially parallel to the horizontal rib portion 82a at a distance from the horizontal rib portion 82a. The two inclined rib portions 86Sb extend substantially parallel to the two inclined rib portions 82c, respectively, spaced from the two inclined rib portions 82c.

  The ribs 82, 86C, 86S, the tapered portions 84C, 84S, and the peripheral portions 74C, 74S, 74T, 74H have the thicknesses of the ribs 52, 56C, 56S and the tapered portions 54C, 54S, 58C, 58S, 58T, respectively. 58H and peripheral portions 44C, 44S, 44T, and 44H have the same thickness.

  That is, the thickness of each of the ribs 82, 86C, 86S is larger than the thickness of each of the peripheral portions 74C, 74S, 74T, 74H, and the thickness of the rib 82 is that of each of the ribs 86C, 86S. The thickness of each of the peripheral portions 74T and 74H is smaller than the thickness of each of the peripheral portions 74C and 74S. The thickness of the rib 86C is equal to or greater than the thickness of the rib 86S, and the thickness of the peripheral portion 74C is equal to or greater than the thickness of the peripheral portion 74S.

  Furthermore, the absolute value of the difference in thickness between the rib 82 and the rib 86C, or the absolute value of the difference in thickness between the rib 82 and the rib 86S, whichever is larger, is the absolute value of the difference in thickness between the rib 82 and the peripheral portion 74T on the toe side. The absolute value of the thickness difference between the rib 82 and the peripheral portion 74H on the heel side is smaller than the smaller one.

  In this golf club head 12B, the same advantages as the golf club head 12A can be obtained. In other words, a decrease in the flying distance of the ball due to the gear effect can be suppressed to a small extent even when the hitting point shifts to the crown side or to the sole side.

  The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to these embodiments, and various modifications and changes can be made without departing from the scope of the present invention. Also good. The various modifications and changes described here include an implementation in which the above-described embodiments are appropriately combined.

DESCRIPTION OF SYMBOLS 10 ... Golf club, 12, 12A, 12B ... Golf club head, 14 ... Shaft, 16 ... Grip, 22 ... Face part, 22a ... Face surface area, 22s ... Score line, 24 ... Crown part, 26 ... Sole part, 28 ... hosel part, 32 ... face member, 34 ... head body, 36 ... weld bead, 42 ... thick part, 44C, 44S, 44T, 44H ... peripheral part, 52 ... rib, 52a ... horizontal rib part, 52b, 52c ... Inclined rib portion, 54C, 54S ... tapered portion, 56C, 56S ... rib, 56Ca, 56Sa ... horizontal rib portion, 56Cb, 56Sb ... inclined rib portion, 58C, 58S, 58T, 58H ... tapered portion, 62 ... face member, 64 ... head body, 66 ... weld bead, 72 ... thick part, 74C, 74S, 74T, 74H ... peripheral part, 82 ... rib, 82a Horizontal rib part, 82b, 82c ... Inclined rib part, 84C, 84S ... Tapered part, 86C, 86S ... Rib, 86Ca, 86Sa ... Horizontal rib part, 86Cb, 86Sb ... Inclined rib part, 88C, 88S, 88T, 88H ... Taper parts, B1, B2 ... ball, F1, F2, H1, H2 ... rotational force, R1, R2 ... arrows, S1, S2 ... _{backspin, t 1, t 2, t} 3, t 4, t 5, t 6, t ₇ ... wall thickness.

Claims (5)

A face portion comprising a thick portion, and at least a crown-side peripheral portion and a sole-side peripheral portion defined by the thick portion;
The thick portion is located on the crown side of the first horizontal rib portion, the first horizontal rib portion extending in the toe-heel direction in the center of the face portion, and on the first horizontal rib portion A second horizontal rib portion extending in parallel; a third horizontal rib portion positioned on the sole side of the first horizontal rib portion and extending in parallel with the first horizontal rib portion ; Two first upwardly inclined rib portions extending obliquely upward from both ends of one horizontal rib portion, and two first upwardly extending obliquely downward from both ends of the first horizontal rib portion A downwardly inclined rib portion, two second upwardly inclined rib portions extending obliquely upward from both ends of the second horizontal rib portion, and obliquely downwardly outward from both ends of the third horizontal rib portion. has a second lower inclined rib portion of the two extending wall thickness of said first horizontal ribs, the first Horizontal rib thickness and the third horizontal rib portion thickness smaller golf club head than any of the of.   2. The golf club head according to claim 1, wherein a thickness of the first horizontal rib portion is larger than a thickness of a peripheral portion on the crown side and a thickness of a peripheral portion on the sole side.   The face part further includes a toe side peripheral part and a heel side peripheral part defined by the thick part, and the thickness of the first horizontal rib part is the thickness of the peripheral part on the toe side. The golf club head according to claim 1, wherein the golf club head is larger than any thickness of a peripheral portion on the heel side.   The thickness of the second horizontal rib portion is equal to or greater than the thickness of the third horizontal rib portion, and the thickness of the peripheral portion on the crown side is the thickness of the peripheral portion on the sole side. The golf club head according to claim 1, wherein the golf club head is equal to or greater than a thickness.   The absolute value of the thickness difference between the first horizontal rib portion and the second horizontal rib portion and the absolute value of the wall thickness difference between the first horizontal rib portion and the third horizontal rib portion, whichever is greater Is the smaller one of the absolute value of the thickness difference between the first horizontal rib portion and the peripheral portion on the toe side and the absolute value of the thickness difference between the first horizontal rib portion and the peripheral portion on the heel side The golf club head of claim 4, wherein the golf club head is smaller.

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