Golf club head

Abstract

The present application provides a wood-type golf club head capable of simultaneously improving the flight distance and directionality of a shot. A golf club head (10) according to one aspect of the present application includes a hollow club head main body (1) and a hosel (2), the distance between the center of gravity (G) of the entire golf club head and a projection point (P) of the center of gravity (G) projected onto the front surface of the face portion (11) is 25 mm or less, the ratio of the height of the projection point (P) to the height of the entire face portion is 0.4 or more and 0.5 or less, and in a state in which the golf club head 10 is disposed on a horizontal plane in such a manner that a prescribed hosel lie angle and a prescribed loft angle are obtained, the ratio of the weight of the portion 15 mm or more below the center of the face (C) and 30 mm or more on the toe side of the center of the face (C) to the weight of the entire golf club head is 0.2 or more, and the ratio of the weight of the portion 30 mm or more above the center of the face (C) and 30 mm or more on the heel side of the center of the face (C) to the weight of the entire golf club head is 0.2 or more.

Description

Technical Field

[0001] This invention relates to golf club heads. Background Technology

[0002] As a wood-type golf club head with a hollow shaft, it is desirable to be lightweight and increase the distance of the shot. Additionally, it is desirable to improve the directionality of the shot within this club head.

[0003] To increase the distance of the shot, achieving low spin is effective. In this view, the driver-type golf clubhead is required to lower the position of the point where the overall center of gravity of the clubhead is projected onto the front surface of the clubface. To lower this projection point, it is effective to shift the center of gravity of the golf clubhead forward (hereinafter, shifting the center of gravity of the golf clubhead forward will also be referred to as "shallow center of gravity").

[0004] Previously, as a technique to achieve a shallow center of gravity in golf club heads, a technique of setting a thick-walled section in front of the inner surface of the club sole was implemented (see Japanese Patent Application Publication No. 2016-93335).

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2016-93335 Summary of the Invention

[0008] The problem that the invention aims to solve

[0009] However, when the technology described in Patent Document 1 is used to achieve a shallow center of gravity in the golf club head, the weight of the club head is concentrated in the front of the sole. As a result, the lateral moment of inertia of the golf club head decreases, and the directionality of the shot is reduced.

[0010] Thus, in modern wood-type golf club heads, there is a trade-off between shallow center of gravity and lateral rotational inertia.

[0011] This invention was made based on this situation, and the purpose of this invention is to provide a wood-type golf club head that can simultaneously improve the flight distance and directionality of the ball.

[0012] Technical solutions for solving the problem

[0013] According to one aspect of the present invention, a golf club head comprises a hollow clubhead body having a face and a sole, and a neck into which the shaft is inserted. The distance between the center of gravity of the golf club head and the projection point of this center of gravity onto the front surface of the face is 25 mm or less. The ratio of the height of the projection point to the overall height of the face is 0.4 to 0.5. When the golf club head is positioned on a horizontal plane with a predetermined neck loft and face loft angle, the weight at least 15 mm below the center of the face and at least 30 mm above the center of the face towards the toe is at least 0.2 compared to the overall weight of the golf club head. The weight at least 30 mm above the center of the face and at least 30 mm above the center of the face towards the heel is at least 0.2 compared to the overall weight of the golf club head.

[0014] The lateral moment of inertia of this golf club head can be 2500 g·cm. 2 above.

[0015] The overall weight of this golf club head can be less than 210g.

[0016] The shaft head body may have a first counterweight protruding from the toe side of the shaft bottom.

[0017] The first counterweight may have a lower surface that extends parallel to the horizontal plane.

[0018] The neck may have a neck body connected to the head body and a second counterweight extending upward from the neck body.

[0019] Furthermore, in this invention, "front" refers to the striking side, and "rear" refers to the opposite side. "Clubface center" refers to the central position of the clubface (the front surface of the clubface) in the toe / heel direction, in the vertical direction. "Toe / heel direction" refers to the horizontal direction orthogonal to the front-rear direction when the golf clubhead is positioned on a horizontal plane with predetermined loft and face angles (the inherent loft and face angles of a golf clubhead). "Lateral moment of inertia" refers to the moment of inertia about a vertical axis passing through the center of gravity of the golf clubhead when the golf clubhead is positioned on a horizontal plane with predetermined loft and face angles. "Parallel to the horizontal plane" means the angle with respect to the horizontal plane is 10° or less. Preferably, this angle is 5° or less, more preferably 3° or less.

[0020] Invention Effects

[0021] In one aspect of the present invention, the distance between the center of gravity of the golf club head and the projection point of that center of gravity onto the front surface of the clubface is less than 25 mm, achieving a thoroughly shallow center of gravity. Through this shallow center of gravity, the ratio of the height of the projection point to the overall height of the clubface is controlled to be between 0.4 and 0.5. As a result, the golf club head can increase the flight distance of the shot. Furthermore, based on the aforementioned shallow center of gravity, the golf club head controls the ratio of its weight at least 15 mm below the center of the clubface and at least 30 mm from the toe side of the clubface to the overall weight of the golf club head to be at least 0.2, and the ratio of its weight at least 30 mm above the center of the clubface and at least 30 mm from the heel side of the clubface to the overall weight of the golf club head to be at least 0.2. As a result, the golf club head can improve the directionality of the shot by increasing the lateral moment of inertia. Attached Figure Description

[0022] Figure 1 This is a schematic front view showing a golf club head according to an embodiment of the present invention.

[0023] Figure 2 From Figure 1 A schematic side view of the toe side of a golf club head.

[0024] Figure 3 yes Figure 1 A schematic top view of a golf club head.

[0025] Figure 4 It was cut using a plane perpendicular to the front and back direction. Figure 1 A schematic cross-sectional view of the back of a golf clubhead.

[0026] Figure 5 Is with Figure 1 Golf club heads with different implementations of golf club heads Figure 2 The corresponding schematic side view.

[0027] Figure 6 It means and Figure 1 and Figure 5 Schematic perspective views of golf club heads with different implementations.

[0028] Figure 7 Is with Figure 1 , Figure 5 and Figure 6 A partial cross-sectional perspective view of a golf club head, showing different implementations of the golf club head from the back side.

[0029] Figure 8This is a three-dimensional cross-sectional view seen from the back side of an existing golf club head.

[0030] Figure 9 Is with Figure 1 and Figures 5 to 7 Cross-sectional perspective views of different implementations of the golf club head from the back side.

[0031] Explanation of reference numerals in the attached drawings: 1, 31, 51, 71: Main body of the club head.

[0032] 2, 32, 52, 72, 250 shaft necks

[0033] 10, 30, 50, 70, 100, 200 golf club heads

[0034] 11, 41, 61, 81, 110, 210 rod face

[0035] 11a and 41a club faces

[0036] 12, 42, 62, 82, 120, 220 rod bottom

[0037] 13 Top

[0038] 14, 64, 84 First counterweight section

[0039] 14a, 64a lower surface

[0040] 14b Outer surface

[0041] 15. Side

[0042] 16, 130 counterweights

[0043] 21, 65 rod neck body

[0044] 22, 66 Second counterweight section

[0045] 22a, 66a Part 1

[0046] 22b Part Two

[0047] 23, 67 sockets

[0048] 31b Planar section

[0049] 84a Columnar section

[0050] 240 The portion of the rod bottom near the toe side

[0051] C-face center

[0052] G Center of Gravity

[0053] P projection point

[0054] R1 First Area

[0055] R2 Second Region

[0056] H-bar overall height

[0057] The height of the H1 projection point Detailed Implementation

[0058] In order to balance a shallow center of gravity and high rotational inertia, the inventors conducted in-depth research on golf club heads with a hollow clubhead body. In this process, the inventors attempted to thoroughly shallowen the center of gravity of golf club heads for drivers with a face loft angle of less than 15°, in order to lower the position of the projection point of the overall center of gravity of the clubhead onto the front surface of the clubface.

[0059] First, such as Figure 8 As shown, the inventors achieved a shallow center of gravity by placing a weight 130 in front of the inner surface of the clubhead 120. The distance between the center of gravity of the golf club head as a whole and the projection point of this center of gravity onto the front surface of the clubface 110 is less than 25 mm. Furthermore, to achieve lightweighting, the overall weight of the golf club head 100 is set to less than 210g (more specifically, 199.7g). However, due to the thoroughly shallow center of gravity, the weight of the golf club head 100 is concentrated in front of the clubhead 120, resulting in a lateral moment of inertia of only 2309 g·cm⁻¹. 2 .

[0060] Based on the results of this study, the inventors concluded that the weight distribution when achieving a shallow center of gravity should be reconsidered in order to balance the shallow center of gravity and high rotational inertia of golf club heads.

[0061] Based on this insight, such as Figure 9 As shown, the inventors achieved this invention by intentionally distributing weight to the portion 240 near the toe of the shaft bottom 220 and the neck 250 into which the shaft is inserted. Figure 9For the golf club head 200, the distance between the center of gravity of the entire club head and the projection point of that center of gravity onto the front surface of the face 210 is 25 mm or less (more specifically, 20 mm). Furthermore, for this golf club head 200, the ratio of the height of the aforementioned projection point to the overall height of the face is 0.445. When positioned on a horizontal plane with predetermined loft angles, the ratio of the weight at least 15 mm below the center of the face and at least 30 mm above the center of the face towards the toe to the overall weight of the golf club head is 0.32, and the ratio of the weight at least 30 mm above the center of the face and at least 30 mm above the center of the face towards the heel to the overall weight of the golf club head is 0.23. The lateral moment of inertia of this golf club head 200 is 3634 g·cm⁻¹. 2 The total weight is 200.7g.

[0062] The embodiments of the present invention will now be described in detail. Furthermore, the upper and lower limits described in this specification can be arbitrarily combined. In this specification, all possible ranges of values ​​from the upper to the lower limits are described as optimal ranges.

[0063] [First Implementation Method]

[0064] <Golf club head>

[0065] Figure 1 The golf club head 10 is a wood-type golf club head. This golf club head 10 has a hollow head body 1 having a face 11 and a sole 12, and a neck 2 into which the shaft (not shown) is inserted. The sole 12 extends rearward from the lower edge of the face 11. Additionally, the head body 1 has a crown 13 extending rearward from the upper edge of the face 11 and a first weight portion 14 protruding from the sole 12 towards the toe. The front surface of the face 11 constitutes the striking face of the golf club head 10 (hereinafter, the front surface of the face is also referred to as "face 11a").

[0066] like Figure 2 As shown, in the case of this golf club head 10, the distance between the center of gravity G of the entire golf club head and the projection point P (the projection point in the normal direction of the club face 11a) onto the center of gravity G is 25mm or less. This golf club head 10 achieves a shallow center of gravity by setting the distance between the center of gravity G and the projection point P to 25mm or less. The upper limit of the distance between the center of gravity G and the projection point P can also be 23mm. The lower limit of the distance between the center of gravity G and the projection point P is not particularly limited, but from the viewpoint of easily achieving overall weight distribution of the golf club head, it can be set to, for example, 15mm.

[0067] The ratio (H1 / H) of the height H1 of the projection point P of the golf club head 10 to the height H of the entire clubface 11 is 0.4 to 0.5. Furthermore, as an upper limit for the aforementioned ratio (H1 / H), 0.45 is preferred. As described above, the golf club head 10 achieves a shallow center of gravity by controlling the projection point P to be in a low position. When the aforementioned ratio (H1 / H) is outside the aforementioned range, it is difficult to achieve low spin on the shot, and it may be difficult to sufficiently increase the flight distance of the shot. Furthermore, the term "the ratio (H1 / H) of the height H1 of the projection point P to the height H of the entire clubface 11" refers to the ratio (H1 / H) measured in the projection image on a plane perpendicular to an imaginary line passing through the center of gravity G and the projection point P. Additionally, the term "the overall height of the clubface" refers to the overall height of the clubface at the position corresponding to the projection point in the aforementioned projection image.

[0068] When the golf club head 10 is positioned on a horizontal plane with a specified loft angle and face angle, it is at least 15 mm below the center of the face C and at least 30 mm to the toe side of the center of the face C. Figure 1 The weight of the first region R1) relative to the overall weight of the golf club head is 0.2 or more. As a lower limit for this weight ratio, 0.25 is preferred. On the other hand, as an upper limit for this weight ratio, from the viewpoint of appropriately controlling the overall weight distribution of the golf club head, 0.4 is preferred. Furthermore, when the golf club head 10 is positioned on a horizontal plane with a predetermined loft angle and face angle, it is at least 30mm above the center of the face C and at least 30mm from the heel side of the center of the face C. Figure 1 The weight of the second region R2) relative to the overall weight of the golf club head is 0.2 or more. As a lower limit for this weight ratio, 0.23 is preferred. On the other hand, as an upper limit for this weight ratio, from the viewpoint of appropriately controlling the overall weight distribution of the golf club head, 0.3 is preferred. By achieving the aforementioned shallow center of gravity and concentrating the overall weight of the golf club head on the toe side of the clubhead 12 and the neck 2, this golf club head 10 can simultaneously achieve low spin on impact and increased lateral rotational inertia.

[0069] There is no particular limitation on the loft angle of this golf club head 10, but its upper limit can be set, for example, to 15°. This golf club head 10 is suitable for improving the low spin and directionality of the shot for drivers with a loft angle of less than 15°.

[0070] The lower limit of the lateral rotational inertia of the golf club head 10 is preferably 2500 g·cm. 2More preferably 2700 g·cm 2 Further optimized to 3000 g·cm 2 The preferred value is 3200g·cm³. 2 When the aforementioned lateral moment of inertia is below the lower limit, it may be impossible to sufficiently improve the directionality of the shot. Furthermore, while there is no specific upper limit for the aforementioned lateral moment of inertia, it can be set at 6000 g·cm² for regulatory purposes. 2 .

[0071] The upper limit for the overall weight of the golf club head 10 is preferably 210g, more preferably 205g, and even more preferably 200g. This allows the golf club head 10 to achieve both a low overall weight and a shallow center of gravity and high lateral moment of inertia. When the overall weight of the golf club head 10 exceeds the aforementioned upper limit, it may be difficult to swing the golf club equipped with the golf club head 10 along the desired trajectory. On the other hand, the lower limit for the aforementioned weight is not particularly limited, and for example, it can be set to 170g.

[0072] (Club head body)

[0073] [First counterweight section]

[0074] As described above, the clubhead body 1 has a first weight portion 14 protruding from the sole 12 toward the toe. The first weight portion 14 is at least partially disposed in the area contained in the first region R1. The first weight portion 14 can be integral with the sole 12 or separate from the sole 12. By having the first weight portion 14, the golf clubhead 10 can easily increase its lateral moment of inertia.

[0075] like Figure 3 As shown, the first weight portion 14 is preferably positioned so as not to affect the maximum width of the clubhead body 1 in the toe-heel direction. To elaborate further, the clubhead body 1 has a side portion 15 connected to the end edge of the top 13 on the toe side. The first weight portion 14 is preferably positioned below the side portion 15 and closer to the toe side than the bottom 12 of the clubhead, without protruding towards the toe side of the side portion 15 in the toe-heel direction. This restricts the maximum width of the clubhead body 1 in the toe-heel direction. Therefore, the first weight portion 14 is preferably effectively positioned within a space that does not restrict the shape of the clubhead body 1.

[0076] like Figure 1As shown, the first weight portion 14 preferably has a lower surface 14a, which extends parallel to the horizontal plane in the toe-heel direction when the golf club head 10 is positioned on a horizontal plane with a predetermined loft angle and face angle. With this structure, it is easy to simultaneously achieve a low center of gravity and an increased lateral moment of inertia for the golf club head 10.

[0077] The lower surface 14a of the club sole 12 and the first weight portion 14 can also extend linearly in the toe-heel direction. That is, a step may not be required at the connection between the club sole 12 and the lower surface 14a of the first weight portion 14. With this structure, a low center of gravity for the golf club head 10 can be easily achieved.

[0078] The first weight portion 14 has an outer surface 14b that extends continuously downward from the lower edge of the side portion 15. With this structure, the lateral moment of inertia of the golf club head 10 can be easily increased at a position that does not affect the maximum width in the toe-heel direction of the club head body 1.

[0079] [Bottom of the stick]

[0080] like Figure 4 As shown, a weight 16 for achieving a lower center of gravity in the golf club head 10 can also be disposed on the inner surface of the club bottom 12. This weight 16 is preferably disposed forward of the center of gravity G of the golf club head 10. Furthermore, this weight 16 is also preferably disposed on the inner surface of the first weight portion 14. By disposing of the weight 16 in the first weight portion 14, the golf club head 10 can simultaneously promote a lower center of gravity and an increase in rotational inertia.

[0081] (Club neck)

[0082] The neck 2 has a neck body 21 connected to the clubhead body 1 and a second weight portion 22 extending upward from the neck body 21. More specifically, the neck 2 has a neck body 21, a socket 23 connected to the upper end of the neck body 21, and a second weight portion 22 extending upward from the socket 23. The second weight portion 22 is at least partially disposed in the area contained in the second region R2. By having the second weight portion 22, the golf club head 10 can easily increase its lateral moment of inertia. To explain in more detail, as described above, in this golf club head 10, the maximum width in the toe-heel direction of the clubhead body 1 is restricted by rules and cannot be increased beyond a certain amount. On the other hand, the neck 2 is not restricted by the maximum width in the toe-heel direction of the clubhead body 1. Therefore, by increasing the length of the neck 2 and thus increasing the weight of the neck 2, the lateral moment of inertia can be effectively increased.

[0083] The second counterweight 22 has a long cylindrical first portion 22a connected to the socket 23 and a second portion 22b, which has a larger diameter than the first portion 22a, connected to the upper end of the first portion 22a. By placing the second portion 22b at the upper end of the first portion 22a, the second counterweight 22 can easily increase the weight of the golf club head 10 at a position away from the center of gravity G. As a result, the lateral moment of inertia can be easily and reliably increased.

[0084] <Advantages>

[0085] In this golf club head 10, the distance between the overall center of gravity G of the club head and the projection point P of that center of gravity G onto the clubface 11a is less than 25mm, achieving a thoroughly shallow center of gravity. Through this shallow center of gravity, the golf club head 10 controls the ratio of the height of the projection point P to the overall height of the clubface 11a to be between 0.4 and 0.5. As a result, the golf club head 10 can increase the flight distance of the ball.

[0086] In this golf club head 10, since the maximum width of the clubhead body 1 in the toe-heel direction is limited by the rules, it is preferable to increase the weight away from the center of gravity G by increasing the length of the neck 2, thereby increasing the lateral moment of inertia. From the perspective of requirements such as a lower center of gravity, it is preferable to increase the weight of the portion located on the toe side, opposite to the neck 2, with the clubface center C as the reference. From this viewpoint, the golf club head 10 maintains a weight ratio of at least 15mm below the clubface center C and at least 30mm above the clubface center C on the toe side relative to the overall weight of the golf club head of at least 0.2, and also maintains a weight ratio of at least 30mm above the clubface center C and at least 30mm above the clubface center C on the heel side relative to the overall weight of the golf club head of at least 0.2. As a result, by increasing the lateral moment of inertia, the golf club head 10 can improve the directionality of the shot.

[0087] [Second Implementation]

[0088] <Golf club head>

[0089] Figure 5 The golf club head 30 is a wood-type golf club head. This golf club head 30 has a hollow head body 31 with a face 41 and a sole 42, and a neck 32 for inserting the shaft. The golf club head 30 has a flat portion 31b on the rear surface of the head body 31. The flat portion 31b is configured to face the face 41a in the front-rear direction. In addition to the flat portion 31b on the rear surface of the head body 31, the golf club head 30 can also employ... Figure 1 The golf club head 10 has the same structure. In addition, the term "flat" includes a partially textured surface.

[0090] <Advantages>

[0091] The golf club head 30, by having a flat portion 31b, can reduce the weight at the rear of the club head body 31. As a result, it is easy to achieve both lightweighting and a shallow center of gravity, and it is also easy to distribute the weight to increase lateral rotational inertia.

[0092] [Third Implementation Method]

[0093] <Golf club head>

[0094] Figure 6 The golf club head 50 is a wood-type golf club head. This golf club head 50 has a hollow head body 51 with a face 61 and a sole 62, and a neck 52 for inserting the shaft. The head body 51 has a first weight portion 64 protruding from the sole 62 towards the toe. The neck 52 has a neck body 65 connected to the head body 51 and a second weight portion 66 extending upward from the neck body 65. More specifically, the neck 52 has a neck body 65, a socket 67 connected to the upper end of the neck body 65, and a second weight portion 66 extending upward from the socket 67. The golf club head 50, except for the shape of the first weight portion 64 and the second weight portion 66, can adopt a shape similar to... Figure 1 The golf club head 10 has the same structure. Therefore, only the first weight section 64 and the second weight section 66 will be described below.

[0095] (First counterweight section)

[0096] The first weight portion 64 is selectively positioned forward of the center of gravity of the golf club head 50. This configuration allows the golf club head 50 to achieve a shallow center of gravity.

[0097] The first weight portion 64 has a lower surface 64a that extends parallel to the horizontal plane in the toe-heel direction when the golf club head 50 is positioned on a horizontal plane with a predetermined loft angle and face angle. The first weight portion 64 is preferably located at a position that does not affect the maximum width of the club head body 51 in the toe-heel direction.

[0098] (Second counterweight section)

[0099] The second counterweight 66 is composed of a long cylindrical first portion 66a connected to the socket 67. That is, the second counterweight 66 does not have a second portion with a larger diameter than the first portion 66a at the upper end of the first portion 66a.

[0100] <Advantages>

[0101] This golf clubhead 50 can simultaneously improve both the distance and direction of the shot.

[0102] [Fourth Implementation Method]

[0103] <Golf club head>

[0104] Figure 7 The golf club head 70 is a wood-type golf club head. This golf club head 70 has a hollow head body 71 with a face 81 and a sole 82, and a neck 72 for inserting the shaft. The head body 71 has a first weight portion 84 protruding from the sole 82 towards the toe. Except for the shape of the first weight portion 84, the golf club head 70 can adopt a shape similar to... Figure 1 The golf club head 10 has the same structure. Therefore, only the first weight section 84 will be described below. Furthermore, in... Figure 7 The figure shows a structure where no weights are disposed on the inner surfaces of the club sole 82 and the first weight portion 84. However, the golf club head 70 may also have weights disposed on the inner surfaces of both or either the club sole 82 and the first weight portion 84.

[0105] (First counterweight section)

[0106] The first counterweight 84 has a columnar portion 84a extending along its central axis in the front-rear direction. The columnar portion 84a extends rearward from a position forward of the center of gravity of the golf club head 70. The columnar portion 84a protrudes further rearward than the center of gravity of the golf club head 70. According to this structure, the golf club head 70 can easily increase its lateral moment of inertia. The specific shape of the columnar portion 84a is not particularly limited; for example, it can be approximately triangular pyramidal.

[0107] The first weight portion 84 has a lower surface that extends parallel to the horizontal plane in the toe-heel direction when the golf club head 70 is positioned on a horizontal plane with a predetermined loft angle and face angle. The first weight portion 84 is preferably located at a position that does not affect the maximum width of the club head body 71 in the toe-heel direction.

[0108] <Advantages>

[0109] This golf clubhead 70 can simultaneously improve the distance and direction of the shot.

[0110] [Other Implementation Methods]

[0111] The above embodiments do not limit the structure of the present invention. Therefore, based on the description in this specification and common technical knowledge, structural elements of each part of the above embodiments may be omitted, replaced, or added, and all such omissions or additions should be interpreted as falling within the scope of the present invention.

[0112] If the golf club head can control the distance between the overall center of gravity of the golf club head and the projection point of the center of gravity onto the front surface of the clubface, the ratio of the height of the projection point to the overall height of the clubface, the ratio of the weight at least 15mm below the center of the clubface and at least 30mm from the toe side of the center of the clubface to the overall weight of the golf club head, and the ratio of the weight at least 30mm above the center of the clubface and at least 30mm from the heel side of the center of the clubface to the overall weight of the golf club head, then a structure without either or both of the aforementioned first and second weighting components can be adopted.

[0113] Even when the golf club head has at least one of the first and second weight portions described above, the specific shape of these weight portions is not limited to the shape described in the above embodiments. For example, when the golf club head has the first weight portion described above, the first weight portion may not have a lower surface extending parallel to the horizontal plane.

[0114] The structures described in the first to fourth embodiments above can be used in any combination. For example, in the structures described in the third or fourth embodiments above, a flat portion may be provided on the rear surface of the rod head body.

[0115] Industrial availability

[0116] As explained above, the golf club head of this invention is suitable for simultaneously improving the flight distance and directionality of the ball.

Claims

1. A golf club head having a hollow club head main body having a face portion and a sole portion, and a hosel portion into which a shaft is inserted, characterized in that, a distance between a center of gravity of the golf club head as a whole and a projection point of the center of gravity projected onto a front surface of the face portion is 25 mm or less, a ratio of a height of the projection point to a height of the face portion as a whole is 0.4 or more and 0.5 or less, in a state where the golf club head is disposed on a horizontal plane so as to have a prescribed hosel lie angle and a prescribed face angle, a ratio of a weight of a region 15 mm or more above a center of the face and 30 mm or more on a toe side with respect to a weight of the golf club head as a whole is 0.2 or more, a ratio of a weight of a region 30 mm or more above the center of the face and 30 mm or more on a heel side with respect to the weight of the golf club head as a whole is 0.2 or more.

2. The golf club head according to claim 1, characterized in that, The lateral rotational inertia is 2500 g-cm 2 The above.

3. The golf club head according to claim 1 or 2, characterized in that, a weight of the golf club head as a whole is 210 g or less.

4. The golf club head according to claim 1 or 2, characterized in that, the club head main body has a first weight portion protruding toward the toe side from the sole portion.

5. The golf club head according to claim 4, characterized in that, the first weight portion has a lower surface extending in parallel with respect to the horizontal plane.

6. The golf club head according to claim 1 or 2, characterized in that, the hosel portion has a hosel main body connected to the club head main body, and a second weight portion extending upward from the hosel main body.

Images