Golf club head

Abstract

To provide a golf club head having a weight body and a lower center of gravity.SOLUTION: The golf club head 100 has a hitting face 102 and a sole surface 104a part. The head 100 includes a head body 120 having a face opening 134 and a weight body insertion portion h1, a face member 122 closing the face opening 134 and forming at least a part of the hitting face 102, a weight body h1 inserted into and fixed to the weight body insertion portion wt1 from the face side, and a joining portion 170 formed at a boundary between the weight body insertion portion h1 and the weight body wt1. The weight body insertion part h1 has a lower side support part 180 for supporting the lower side of the weight body wt1, a toe side support part 182 for supporting the toe side of the weight body wt1, a heel side support part 184 for supporting the heel side of the weight body wt1, an upper side support part 186 for supporting the upper side of the weight body wt1, and a missing part 190 formed by missing a part of the upper side support part 186.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a golf club head. [Background technology]

[0002] Golf club heads equipped with weights (weight members) are known. JP 2020-178933 A discloses a golf club head having a head body, a face plate fixed to the head body, and a weight member. In this head, the head body has a body recess that opens to the face side, and the weight member is inserted into this body recess. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-178933 Summary of the Invention [Problem to be solved by the invention]

[0004] The weight allows for adjustment of the center of gravity position and weight distribution of the head. The inventor has discovered a new structure that uses a weight to lower the center of gravity of the head. One of the objects of the present invention is to provide a golf club head with a weight and a lower center of gravity. [Means for solving the problem]

[0005] In one aspect, the golf club head is a golf club head having a striking face and a sole surface. This golf club head includes a head body with a face opening and a weight body insert portion, a face member that closes the face opening and constitutes at least a portion of the striking face, a weight body inserted into and fixed to the weight body insert portion from the face side, and a joint portion formed at the boundary between the weight body insert portion and the weight body. The weight body insert portion has a lower support portion that supports the lower side of the weight body, a toe-side support portion that supports the toe side of the weight body, a heel-side support portion that supports the heel side of the weight body, an upper support portion that supports the upper side of the weight body, and a missing portion formed by missing a portion of the upper support portion. [Effects of the Invention]

[0006] In one aspect, a golf club head having a weight and a lower center of gravity can be provided. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a view of a golf club head according to a first embodiment, viewed from the front of the hitting face. [Figure 2] Figure 2 is the same as Figure 1. In Figure 2, hidden lines are shown as dashed lines. [Figure 3] FIG. 3 is a perspective view of the head of FIG. 1 as seen from the back side. [Figure 4] FIG. 4 is an exploded perspective view of the head of FIG. [Figure 5] FIG. 5 is a view of the head body of the head of the first embodiment, seen from the same perspective as FIG. [Figure 6] FIG. 6 is a perspective view of the head body of the head of the first embodiment as seen from the back side. [Figure 7] FIG. 7 is a cross-sectional view taken along line AA in FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line BB in FIG. [Figure 9] FIG. 9 is a cross-sectional view taken along line CC in FIG. [Figure 10] FIG. 10 is a cross-sectional view taken along line DD in FIG. [Figure 11] FIG. 11 is a cross-sectional view taken along line EE in FIG. [Figure 12] FIG. 12 is a view of the golf club head according to the second embodiment as viewed from the front of the hitting face. [Figure 13] Figure 13 is the same as Figure 12. In Figure 13, hidden lines are shown as dashed lines. [Figure 14] FIG. 14 is a perspective view of the head of FIG. 12 as seen from the back side. [Figure 15] FIG. 15 is an exploded perspective view of the head of FIG. [Figure 16] FIG. 16 is a view of the head body of the head of the second embodiment, seen from the same viewpoint as FIG. [Figure 17] FIG. 17 is a perspective view of the head body of the head according to the second embodiment, as viewed from the back side. [Figure 18] FIG. 18 is a cross-sectional view taken along the line AA in FIG. [Figure 19] FIG. 19 is a cross-sectional view taken along line BB in FIG. [Figure 20] FIG. 20 is a cross-sectional view taken along line CC in FIG. [Figure 21] FIG. 21 is a cross-sectional view taken along line DD in FIG. [Figure 22] FIG. 22 is a cross-sectional view taken along line EE in FIG. [Figure 23] FIG. 23 is a view of the golf club head according to the third embodiment as viewed from the front of the hitting face. [Figure 24] Figure 24 is the same as Figure 23. In Figure 24, hidden lines are shown as dashed lines. [Figure 25] FIG. 25 is a perspective view of the head of FIG. 23 as seen from the back side. [Figure 26] FIG. 26 is an exploded perspective view of the head of FIG. [Figure 27]FIG. 27 is a view of the head body of the head of the third embodiment, seen from the same viewpoint as FIG. [Figure 28] FIG. 28 is a perspective view of the head body of the head according to the third embodiment, as viewed from the back side. [Figure 29] FIG. 29 is a cross-sectional view taken along the line AA in FIG. [Figure 30] FIG. 30 is a cross-sectional view taken along line BB in FIG. [Figure 31] FIG. 31 is a cross-sectional view taken along line CC in FIG. [Figure 32] FIG. 32 is a cross-sectional view taken along line DD in FIG. [Figure 33] FIG. 33 is a cross-sectional view taken along line EE in FIG. [Figure 34] FIG. 34 is an exploded perspective view of the head of the fourth embodiment. [Figure 35] FIG. 35 is a vertical cross-sectional view of the head of the fifth embodiment. [Figure 36] Figure 36(a) is an oblique view of a head body with a weight body according to the first embodiment, Figure 36(b) is an oblique view of a head body with a weight body according to the second embodiment, and Figure 36(c) is an oblique view of a head body with a weight body according to the third embodiment. [Figure 37] FIG. 37 is a conceptual diagram for explaining the reference state. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, the present invention will be described in detail based on preferred embodiments, with reference to the accompanying drawings. In each embodiment, identical or common elements are designated by the same reference numerals, and redundant explanations will be omitted as appropriate.

[0009] As used herein, the following terms are defined.

[0010] [Reference condition] When the hitting face is flat, as in the case of an iron head, the reference state is when the head is placed on the contact plane HP with the score lines parallel to the contact plane HP. When the hitting face is curved, as in the case of a wood head, the reference state is when the head is placed on the contact plane HP at a predetermined lie angle. In these reference states, the center line Z of the shaft hole in the head (shaft axis Z) is located within a vertical plane VP (see Figure 37). The vertical plane VP is a plane perpendicular to the contact plane HP.

[0011] In the above-mentioned reference state, the face angle is set to 0 degrees. That is, in a plan view seen from above, the normal to the geometric center of the hitting face is set to be perpendicular to the intersection line NL. The intersection line NL is the intersection line between the vertical plane VP and the ground plane HP. When the hitting face is flat, the intersection line NL is parallel to the scorelines.

[0012] There are known clubs equipped with variable mechanisms that allow the loft angle, lie angle, and face angle to be adjusted by the rotational position of a sleeve or other element attached to the tip of the shaft. In the head used in such a club, in the reference state, all adjustment items are set to neutral, and the shaft axis Z is specified. "Neutral" refers to the center of the adjustment range. To achieve neutrality in all adjustment items, a sleeved shaft can be used in which the shaft hole of the sleeve is not inclined relative to the outer shape of the sleeve, and the center line of the sleeve coincides with the shaft axis.

[0013] [Toe-heel direction] The direction of the intersection line NL is the toe-heel direction. When the hitting face is flat, this toe-heel direction is parallel to the scoreline.

[0014] [Anteroposterior direction] The direction perpendicular to the toe-heel direction and parallel to the ground plane HP is the front-to-back direction.

[0015] [Face-back direction] The direction of the normal to the striking face at the face center is the face-back direction. If the striking face is planar, the face-back direction is the direction perpendicular to the striking face. [vertical direction] The direction perpendicular to the ground plane HP is the up-down direction.

[0016] [Toe reference position] Each of the multiple scorelines has a toe-side end. The position of the toe-most end of these toe-side ends is defined as the toe reference position. In a typical iron-type golf club head, the toe-side ends of all scorelines are aligned, and this position is defined as the toe reference position. Note that, particularly in wedges, heads in which scorelines are formed over substantially the entire striking face are known. These heads are also referred to as full scoreline heads. In this case, the position 18.5 mm toward the heel from the most toe-side point on the striking face can be defined as the toe reference position. The toe reference position is defined as the position in the toe-heel direction.

[0017] [Heel reference position] Each of the multiple scorelines has a heel-side end. The position of the heel-most end among these heel-side ends is set as the heel reference position. In a typical iron-type golf club head, the heel-side end of the longest scoreline is set as the heel reference position. The heel reference position is a position in the toe-heel direction.

[0018] [Scoreline center position] The scoreline center position is the position that divides the distance between the toe reference position and the heel reference position into two equal parts. In a typical iron-type golf club head, the center position of the longest scoreline is the scoreline center position. The scoreline center position is a position in the toe-heel direction.

[0019] [Toe center position] The position that bisects the toe reference position and the scoreline center position is the toe middle position, which is a position in the toe-heel direction.

[0020] [Heel midpoint] The position that bisects the heel reference position and the scoreline center position is the heel middle position, which is a position in the toe-heel direction.

[0021] Profile A cross section along the face-back direction and the up-down direction is a longitudinal cross section.

[0022] [Leading Edge] In the longitudinal section of the head, the point located most forward in the front-to-back direction is determined. This point is determined at each position in the toe-heel direction. The set of these points is the leading edge.

[0023] [trailing edge] When the radius of curvature of the sole surface is measured sequentially toward the rear on the longitudinal cross section of the head, the point where the radius of curvature is first 5 mm or less is determined. This point is determined at each position in the toe-heel direction. The set of these points is defined as the trailing edge. The trailing edge is the rear edge of the sole surface.

[0024] [Face Center] The point that divides the width of the hitting face in half at the center position of the scoreline is the face center. Note that for heads where the center position of the scoreline cannot be defined, the geometric center (centroid) of the hitting face in a planar view can be considered the face center. The planar view of the hitting face can be considered as a projection image onto a plane perpendicular to the face-back direction.

[0025] Fig. 1 is a view of the head 100 of the first embodiment as seen from the front side of the hitting face 102. Fig. 2 is the same view as Fig. 1, but the lines of the head body 120 that are hidden by the face member 122 are shown by dashed lines. Fig. 3 is a perspective view of the head 100 as seen from the back side.

[0026] The head 100 has a hitting face 102, a sole portion 104, a top blade 106, and a hosel 108. The sole portion 104 has a sole surface 104a. The sole surface 104a is the outer surface of the sole portion 104. The hosel 108 has a hosel hole 110. The hosel hole 110 has a center line Z. A shaft (not shown) is attached to the hosel hole 110. The center line Z coincides with the shaft axis. The hitting face 102 and the sole surface 104a form the outer surface of the head 100.

[0027] 3, the head 100 has a leading edge Le and a trailing edge Te. The trailing edge Te is the rear edge of the sole surface 104a. The sole surface 104a has a ridge line 112 extending from the toe side toward the heel side. The ridge line 112 is located between the leading edge Le and the trailing edge Te.

[0028] 1, the striking face 102 has a plurality of scorelines gv, including the longest scoreline gv1. All of the scorelines gv are formed on the face member 122.

[0029] The head 100 is an iron-type golf club head. The hitting face 102 is flat. As shown in FIG. 3 , the head 100 has a back cavity 114. The back cavity 114 is a cavity formed on the back side of the head 100. The back cavity 114 forms a cavity space SP. The cavity space SP is the internal space of the back cavity 114. An iron head having a back cavity 114 is referred to as a cavity back iron head by those skilled in the art. The head 100 is a cavity back iron head. However, the head 100 does not have to be a cavity back iron head. For example, the head 100 may be a muscle back iron head. In this case, the muscle back iron head may be a hollow iron head with a hollow portion. If it is a hollow iron head, the upper surface 162 (described below) of the weight wt1, which is opened by the notch 190, may face this hollow portion.

[0030] The head 100 has a back surface 116. The back surface 116 is located above the trailing edge Te. Note that the portion inside the back cavity 114 (such as the back surface 152 of the face member 122) may be excluded from the back surface 116. The back surface 116 forms the outer surface of the head 100.

[0031] It should be noted that the head 100 does not have to be an iron-type head. The head 100 may be a wood-type head, a hybrid-type head, or a putter-type head. The hitting face 102 does not have to be flat. Preferably, the head 100 is an iron-type head.

[0032] 1, the head 100 has a face center Fc, a toe reference position Pt, a heel reference position Ph, a scoreline center position Pc, a toe middle position Pt1, and a heel middle position Ph1. The definitions of these positions are as described above. In this embodiment, the toe reference position Pt is the position of the toe-side end of the scoreline gv.

[0033] Fig. 4 is an exploded perspective view of the head 100. Fig. 5 is a diagram of the head body 120 to which the weight body wt1 is attached. Fig. 6 is a perspective view of the head body 120 as viewed from the back side. Note that in Fig. 4, the weight body wt1 fixed to the head body 120 is shown by a virtual line (two-dot chain line). Also, in Fig. 4, the score lines gv on the face member 122 are omitted.

[0034] FIG. 7 is a cross-sectional view taken along line AA in FIG. 2. FIG. 7 is a longitudinal cross-sectional view on the toe side of the toe reference position Pt. FIG. 7 is a cross-sectional view at the toe-side end of the weight body wt1. FIG. 8 is a cross-sectional view taken along line BB in FIG. 2. Line BB is also shown in FIG. 1. FIG. 8 is a longitudinal cross-sectional view at the toe reference position Pt. FIG. 9 is a cross-sectional view taken along line CC in FIG. 2. FIG. 9 is a longitudinal cross-sectional view at the scoreline center position Pc. Line CC is also shown in FIG. 1. FIG. 10 is a cross-sectional view taken along line DD in FIG. 2. FIG. 10 is a longitudinal cross-sectional view at the heel-side end of the weight body wt1. FIG. 11 is a cross-sectional view taken along line EE in FIG. 2. Line EE is also shown in FIG. 1. FIG. 11 is a longitudinal cross-sectional view at the heel reference position Ph. Note that, to make the cross-sectional positions easier to understand, these cross-sectional positions from AA to EE are also shown in FIG. 5. In FIG. 5, the cross-sectional lines at each cross-sectional position are indicated by two-dot chain lines.

[0035] The head 100 is formed of multiple members. In terms of the constituent members, the head 100 has a head body 120, a face member 122, and a weight body wt1. The face member 122 is fixed to the head body 120. The weight body wt1 is fixed to the head body 120. The face member 122 constitutes at least a portion of the hitting face 102. In this embodiment, the face member 122 constitutes the entire hitting face 102. The head body 120 constitutes at least a portion of the sole portion 104 (sole surface 104a). In this embodiment, the head body 120 constitutes the entire sole portion 104 (sole surface 104a). The head body 120 constitutes the hosel 108.

[0036] As shown in Fig. 8, the weight body wt1 is located at the toe reference position Pt. As shown in Fig. 9, the weight body wt1 is located at the scoreline center position Pc. As shown in Fig. 11, the weight body wt1 is not located at the heel reference position Ph.

[0037] The head body 120 is formed from a metal. Examples of this metal include stainless steel, mild steel, maraging steel, and titanium alloy. In this embodiment, the material of the head body 120 is stainless steel. The face member 122 is formed from a metal. Examples of this metal include titanium alloy, stainless steel, chrome vanadium steel, and maraging steel. In this embodiment, the material of the face member 122 is titanium alloy. The materials of the head body 120 and the face member 122 are not limited. From the viewpoint of tolerance, it is preferable that the specific gravity of the face member 122 is smaller than that of the head body 120. In this embodiment, the face member 122 is produced by forging. The manufacturing method of the face member 122 is not limited.

[0038] The weight body wt1 is made of metal. The specific gravity of the weight body wt1 is greater than the specific gravity of the head body 120. The specific gravity of the weight body wt1 is greater than the specific gravity of the face member 122. From the viewpoint of high specific gravity, an alloy containing tungsten and / or nickel is preferable as the material for the weight body wt1. Taking formability into consideration, an alloy containing tungsten and nickel is more preferable. The material for the weight body wt1 may be a material that can be welded to the head body 120, or a material that cannot be welded to the head body 120.

[0039] From the viewpoint of the degree of freedom in designing the center of gravity of the head, the specific gravity of the weight wt1 is preferably 9.0 or more, more preferably 9.1 or more, and more preferably 9.2 or more. Considering available materials, the specific gravity of the weight wt1 is preferably 20.0 or less, more preferably 19.9 or less, and more preferably 19.8 or less. Considering the material having the strength required for the head body 120, the specific gravity of the head body 120 is preferably 4.0 or more, more preferably 4.1 or more, and more preferably 4.2 or more. To increase the degree of freedom in designing the center of gravity of the head, it is preferable that the specific gravity of the head body 120 is significantly different from the specific gravity of the weight wt1. From this viewpoint, the specific gravity of the head body 120 is preferably 8.0 or less, more preferably 7.95 or less, and more preferably 7.9 or less. Considering the material having the strength required for the face member 122, the specific gravity of the face member 122 is preferably 4.0 or more, more preferably 4.1 or more, and more preferably 4.2 or more. To increase the degree of freedom in designing the center of gravity of the head, it is preferable that there be a large difference between the specific gravity of the face member 122 and the specific gravity of the weight wt1. From this viewpoint, the specific gravity of the face member 122 is preferably equal to or less than 8.0, more preferably equal to or less than 7.95, and still more preferably equal to or less than 7.9.

[0040] The head body 120 is molded as a single unit. The head body 120 may be formed by joining a plurality of members together by welding or the like. The head body 120 is produced by casting. This casting is a lost-wax precision casting. The method for producing the head body 120 is not limited.

[0041] The head body 120 has a face opening 134. The face opening 134 penetrates the head body 120 in the face-back direction. The face opening 134 is closed by the face member 122. The head body 120 forms a frame that surrounds the periphery of the face opening 134.

[0042] The head body 120 has a receiving surface 136. The receiving surface 136 faces the face side. The receiving surface 136 supports the peripheral edge of the face member 122 from the back side. In this embodiment, the receiving surface 136 is provided along the face opening 134 and outside the face opening 134. The receiving surface 136 is formed along an opening edge 138 of the face opening 134. The receiving surface 136 forms a plane. This plane is parallel to the hitting face 102.

[0043] The head body 120 has a heel step surface 140. The heel step surface 140 extends forward from the receiving surface 136. The height of the heel step surface 140 corresponds to the thickness of the face member 122. The heel step surface 140 abuts against a side surface 142 on the heel side of the face member 122.

[0044] In this embodiment, the face opening 134 is closed by the face member 122, which is larger than the face opening 134, covering the face opening 134. The face member 122 may be fitted into the face opening 134.

[0045] The head main body 120 has a weight body insertion portion h1. The weight body wt1 is inserted into the weight body insertion portion h1. The weight body wt1 is housed in the weight body insertion portion h1. The weight body wt1 is held in the weight body insertion portion h1. In this embodiment, the weight body insertion portion h1 is a recess. However, as described below, the wall defining this recess is partially missing (see missing portion 190 described below). The weight body insertion portion h1 opens on the face side. The weight body wt1 is inserted into the weight body insertion portion h1 from the face side.

[0046] The weight body insertion portion h1 does not have to be a recess. As will be described later, the weight body insertion portion h1 may be, for example, a through-hole.

[0047] The face member 122 is generally plate-shaped. The face member 122 has a front surface 150 and a back surface 152. The front surface 150 constitutes at least a portion of the hitting face 102. In this embodiment, the front surface 150 constitutes the entire hitting face 102. The back surface 152 is the surface opposite the front surface 150. The peripheral edge of the back surface 152 abuts against the receiving surface 136. The face member 122 does not have to be plate-shaped. The face member 122 may be, for example, a cup face.

[0048] The weight body wt1 has a front surface 160, an upper surface 162, a lower surface 164, and a side surface 168. The side surface 168 has a toe side surface 168a and a heel side surface 168b. As shown in FIGS. 7 to 10, the front surface 160 faces the pocket space SP1 of the cavity space SP. The front surface 160 constitutes an opposing surface facing the back surface 152 of the face member 122. The front surface 160 faces the back surface 152 via a space (cavity space SP, pocket space SP1). The lower surface 164 abuts against the inner surface of the weight body insertion portion h1. The side surface 168 abuts against the inner surface of the weight body insertion portion h1.

[0049] The center of gravity of the weight body wt1 is located closer to the toe than the scoreline center position Pc. The center of gravity of the weight body wt1 is located closer to the toe than the toe middle position Pt1. The weight body wt1 contributes to positioning the center of gravity of the head closer to the toe.

[0050] The center of gravity of the weight wt1 is located closer to the sole than the face center Fc. The entire weight wt1 is located closer to the sole than the face center Fc. The weight wt1 contributes to lowering the center of gravity of the head.

[0051] The position of the weight body wt1 is not limited. In this embodiment, the weight body wt1 has a portion located on the toe side of the scoreline center position Pc. The weight body wt1 has a portion located on the toe side of the toe reference position Pt. The weight body wt1 has a portion located between the toe reference position Pt and the scoreline center position Pc. The weight body wt1 does not exist at the heel reference position Ph. The entire weight body wt1 is located on the toe side of the heel reference position Ph. The weight body wt1 does not exist at the heel midpoint Ph1. The entire weight body wt1 is located on the toe side of the heel midpoint Ph1. The center of gravity of the weight body wt1 is located on the sole side of the face center Fc. The entire weight body wt1 is located on the sole side of the face center Fc.

[0052] As shown in FIGS. 7 to 11, the head 100 has a pocket space SP1. The pocket space SP1 is a gap having a width in the face-back direction. The pocket space SP1 is part of the cavity space SP defined by the back cavity 114. The face side of the pocket space SP1 is defined by the back surface 152 of the face member 122. The back side of the pocket space SP1 is defined by a surface facing the back surface 152. The surface facing the back surface 152 is formed by the head main body 120 and / or the weight body wt1. The pocket space SP1 is a space connected to the external space of the head 100.

[0053] The surface defining the back side of the pocket space SP1 may include the front surface 160 of the weight body wt1. The front surface 160 faces the pocket space SP1. The pocket space SP1 is between the front surface 160 and the back surface 152. The front surface 160 faces the back surface 152.

[0054] The weight body wt1 is inserted into the weight body insertion portion h1 from the face side (see the dashed arrow in FIG. 4). The weight body wt1 is fixed to the weight body insertion portion h1. As shown in FIGS. 7 to 10, a joint 170 is formed at the boundary between the weight body insertion portion h1 and the weight body wt1. In this embodiment, the joint 170 is a welded portion 172. Note that the joint 170 may be something other than the welded portion 172; for example, it may be a portion joined by press-fitting or a portion bonded with an adhesive. Note that in FIGS. 7 to 10, the joint 170 (welded portion 172) has its own shape, but it is not required to have such a shape. In other words, the joint 170 (welded portion 172) may only be a portion that penetrates into the boundary surface between the weight body insertion portion h1 and the weight body wt1.

[0055] In this embodiment, the welded portion 172 is provided on the face side of the weight body wt1. The welded portion 172 is provided only around the periphery of the front surface 160 of the weight body wt1. The welded portion 172 is provided only on the face side of the weight body wt1. The welded portion 172 is provided only at a position facing the pocket space SP1. The welded portion 172 is not provided on the outer surface of the head 100. The position of the welded portion 172 is not limited.

[0056] The welded portion 172 is a portion formed by welding. In this application, welding includes fusion welding, pressure welding, and brazing. In this application, welding may involve melting only one of the base materials (the head main body 120 and the weight body wt1), or both of the base materials. Also, in this application, welding may involve melting only the filler material (including brazing material) without melting both base materials. A filler material may or may not be used. The welded portion 172 is a concept that includes the following configurations a, b, c, d, and e. A weld bead is an example of the welded portion 172. (Configuration a) The weight body wt1 is not melted, and the head main body 120 is solidified after melting to form a portion. (Configuration b) A portion formed by melting and then solidifying the head body 120 and the weight body wt1. (Configuration c) The weight body wt1 is not melted, and is formed when the head body 120 and the filler material are solidified after melting. (Configuration d) The head body 120, the weight body wt1, and the part formed by the filler material solidifying after melting. (Configuration e) The head body 120 and the weight body wt1 are not melted, and only the filler metal (brazing material) is melted and solidified to form this portion.

[0057] The weight body wt1 may be integrated with the head body 120 by a welded portion 172. The weight body wt1 may not be integrated with the head body 120, but may be physically engaged with the welded portion 172 that is integrated with the head body 120. The weight body wt1 may not be integrated with the head body 120, but may be joined with a brazing material. If the welded portion 172 is located on the face side of the weight body wt1 and is engaged with the weight body insertion portion h1 so that the weight body wt1 cannot move toward the back side, the welded portion 172 can fix the weight body wt1 even if it is only physically engaged with the weight body wt1.

[0058] In the head 100, the welded portion 172 has the above configuration d. That is, the welded portion 172 is formed by melting the head main body 120, the weight wt1, and the filler material and then solidifying them.

[0059] The weight body insertion portion h1 has a lower support portion 180 that supports the underside of the weight body wt1 (see FIGS. 7 to 10). In this embodiment, the lower support portion 180 is formed by the sole portion 104. The outer surface of the wall portion that constitutes the lower support portion 180 is the sole surface 104a. The lower support portion 180 abuts against the lower surface 164 of the weight body wt1.

[0060] The weight body insertion portion h1 has a toe side support portion 182 that supports the toe side of the weight body wt1 (see FIG. 4). The toe side support portion 182 abuts against the toe side surface 168a of the weight body wt1.

[0061] The weight body inserting portion h1 has a heel side support portion 184 that supports the heel side of the weight body wt1 (see FIG. 4). The heel side support portion 184 abuts against the heel side surface 168b of the weight body wt1.

[0062] The weight body insertion portion h1 has an upper support portion 186 that supports the upper side of the weight body wt1 (see FIG. 4). The upper support portion 186 abuts against the upper surface 162 of the weight body wt1. The upper support portion 186 has a toe upper support portion 186a that supports the toe side end of the weight body wt1 from above, and a heel upper support portion 186b that supports the heel side end of the weight body wt1 from above. The toe upper support portion 186a extends from the toe side support portion 182 and terminates above the weight body wt1. The heel upper support portion 186b extends from the heel side support portion 184 and terminates above the weight body wt1.

[0063] The weight body insertion portion h1 has a notch 190 formed by removing a portion of the upper support portion 186 (see FIG. 4). The notch 190 leaves the weight body insertion portion h1 open to the upper side. The notch 190 forms a portion of the upper surface 162 of the weight body wt1 that does not come into contact with the weight body insertion portion h1. The notch 190 is formed between the toe upper support portion 186a and the heel upper support portion 186b. The notch 190 divides the upper support portion 186 into the toe upper support portion 186a and the heel upper support portion 186b.

[0064] The notched portion 190 penetrates the upper support portion 186 in the face-back direction. In the upper support portion 186, only the toe upper support portion 186a and the heel upper support portion 186b are in contact with the upper surface 162 of the weight body wt1. In the area where the notched portion 190 exists, the upper surface 162 of the weight body wt1 faces the cavity space SP, which is the internal space of the back cavity 114.

[0065] Figure 12 is a view of the head 200 of the second embodiment as seen from the front side of the hitting face 102. Figure 13 is the same view as Figure 12, but the lines of the head body 120 that are hidden by the face member 122 are shown by dashed lines. Figure 14 is a perspective view of the head 200 as seen from the back side.

[0066] The head 200 has a hitting face 102, a sole portion 104, a top blade 106, and a hosel 108. The sole portion 104 has a sole surface 104a. The hosel 108 has a hosel hole 110. The head 200 is an iron-type golf club head. The hitting face 102 is flat. As shown in FIG. 14 , the head 200 has a back cavity 114. The back cavity 114 forms a cavity space SP on the back side of the head 200. The head 200 has a back surface 116.

[0067] FIG. 15 is an exploded perspective view of the head 200. In FIG. 15, the weight body wt1 fixed to the head main body 120 is shown by a virtual line (two-dot chain line). Also, in FIG. 15, the score lines gv on the face member 122 are omitted. FIG. 16 is a front view of the head main body 120 to which the weight body wt1 is attached. FIG. 17 is a perspective view of the head main body 120 as viewed from the back side. FIG. 18 is a cross-sectional view taken along line AA in FIG. 13. FIG. 18 is a cross-sectional view at the toe-side end of the weight body wt1. FIG. 19 is a cross-sectional view taken along line BB in FIG. 13. FIG. 19 is a vertical cross-sectional view at the toe reference position Pt. FIG. 20 is a cross-sectional view taken along line CC in FIG. 13. FIG. 20 is a vertical cross-sectional view at the scoreline center position Pc. FIG. 21 is a cross-sectional view taken along line DD in FIG. 13. FIG. 21 is a vertical cross-sectional view at the heel-side end of the weight body wt1. FIG. 22 is a cross-sectional view taken along line EE in FIG. 13. Figure 22 is a vertical cross-sectional view at the heel reference position Ph. To make the cross-sectional positions easier to understand, the cross-sectional positions AA to EE are also shown in Figure 16. In Figure 16, the cross-sectional line at each cross-sectional position is indicated by a two-dot chain line.

[0068] The head 200 is formed of multiple members. In terms of the constituent members, the head 200 has a head body 120, a face member 122, and a weight body wt1. The face member 122 is fixed to the head body 120. This fixing is achieved by welding. The weight body wt1 is fixed to the head body 120. The head body 120 has a face opening 134. The face opening 134 penetrates the head body 120 in the face-back direction. The face opening 134 is closed by the face member 122.

[0069] The head main body 120 has a receiving surface 136. The receiving surface 136 faces the face side. The receiving surface 136 supports the peripheral edge of the face member 122 from the back side. In this embodiment, the receiving surface 136 is provided along the face opening 134 and outside the face opening 134. The receiving surface 136 is formed along an opening edge 138 of the face opening 134.

[0070] The head body 120 has a heel step surface 140. The heel step surface 140 extends forward from the receiving surface 136. The height of the heel step surface 140 corresponds to the thickness of the face member 122. The heel step surface 140 abuts against a side surface 142 on the heel side of the face member 122.

[0071] The head body 120 has a weight body insertion portion h1. A weight body wt1 is inserted into the weight body insertion portion h1. In this embodiment, the weight body insertion portion h1 is a recess. The weight body insertion portion h1 is open on the face side.

[0072] The face member 122 has a front surface 150 and a back surface 152. The front surface 150 constitutes at least a portion of the striking face 102. In this embodiment, the front surface 150 constitutes the entire striking face 102. The back surface 152 is the surface opposite the front surface 150. The peripheral edge of the back surface 152 abuts against the receiving surface 136.

[0073] The weight body wt1 has a front surface 160, an upper surface 162, a lower surface 164, and a side surface 168. The side surface 168 has a toe side surface 168a and a heel side surface 168b. The front surface 160 faces the pocket space SP1. The front surface 160 constitutes an opposing surface facing the back surface 152 of the face member 122. The front surface 160 faces the back surface 152 via a space (cavity space SP, pocket space SP1). The lower surface 164 abuts against the inner surface of the weight body insertion portion h1. The side surface 168 abuts against the inner surface of the weight body insertion portion h1.

[0074] The weight body wt1 is inserted into the weight body insertion portion h1 from the face side (see the dashed arrow in FIG. 15). The weight body wt1 is fixed to the weight body insertion portion h1. As shown in FIGS. 18 to 21, a joint 170 is formed at the boundary between the weight body insertion portion h1 and the weight body wt1. In this embodiment, the joint 170 is a welded portion 172.

[0075] In this embodiment, the welded portion 172 is provided on the face side of the weight body wt1. The welded portion 172 is provided only on the face side of the weight body wt1. The welded portion 172 is provided only at a position facing the cavity space SP. The welded portion 172 is provided only at a position facing the pocket space SP1. The welded portion 172 is provided only around the periphery of the front surface 160.

[0076] The weight body insert part h1 has a lower support part 180 that supports the underside of the weight body wt1 (see Figures 18 to 21). In this embodiment, the lower support part 180 is formed by the sole part 104. The lower support part 180 abuts against the lower surface 164 of the weight body wt1. The weight body insert part h1 has a toe side support part 182 that supports the toe side of the weight body wt1 (see Figure 15). The toe side support part 182 abuts against the toe side surface 168a of the weight body wt1. The weight body insert part h1 has a heel side support part 184 that supports the heel side of the weight body wt1. The heel side support part 184 abuts against the heel side surface 168b of the weight body wt1.

[0077] The weight body insertion portion h1 has an upper support portion 186 that supports the upper side of the weight body wt1. The upper support portion 186 abuts against the upper surface 162 of the weight body wt1. The upper support portion 186 has a continuous cross portion 186c that extends continuously from the toe-side support portion 182 to the heel-side support portion 184. The continuous cross portion 186c is formed on the face side. The continuous cross portion 186c abuts against the edge of the face side of the upper surface 162 of the weight body wt1 (see FIGS. 19 and 20).

[0078] The weight body insertion portion h1 has a notch 190 formed by removing a portion of the upper support portion 186. Where the notch 190 is formed, the weight body insertion portion h1 is open upward. The notch 190 forms a portion of the upper surface 162 of the weight body wt1 that does not abut against the weight body insertion portion h1. In the area where the notch 190 is present, the upper surface 162 of the weight body wt1 faces the cavity space SP. The notch 190 is formed on the back side of the continuous cross portion 186c. The head 200 of this embodiment differs from the previously described head 100 only in the configuration of the upper support portion 186 and the notch 190.

[0079] Note that this embodiment also includes a toe upper support portion 186a and a heel upper support portion 186b. Although not visible in FIG. 15, as shown in FIG. 18, the toe upper support portion 186a is provided on the toe side of a notch 190 formed on the back side of the continuous cross portion 186c. As shown in FIG. 15, the heel upper support portion 186b is provided on the heel side of the notch 190 formed on the back side of the continuous cross portion 186c. The notch 190 is provided between the toe upper support portion 186a and the heel upper support portion 186b. The face side of the toe upper support portion 186a is connected to the continuous cross portion 186c. The face side of the heel upper support portion 186b is connected to the continuous cross portion 186c. The toe upper support portion 186a extends from the toe support portion 182 and supports the toe-side end portion of the weight body wt1 from above. The heel upper support portion 186b extends from the heel side support portion 184 and supports the heel side end portion of the weight body wt1 from above. Note that the toe upper support portion 186a and the heel upper support portion 186b do not necessarily have to be provided.

[0080] Figure 23 is a view of the head 300 of the third embodiment as seen from the front side of the hitting face 102. Figure 24 is the same view as Figure 23, but the lines of the head body 120 hidden by the face member 122 are shown by dashed lines. Figure 25 is a perspective view of the head 300 as seen from the back side.

[0081] The head 300 has a hitting face 102, a sole portion 104, a top blade 106, and a hosel 108. The sole portion 104 has a sole surface 104a. The hosel 108 has a hosel hole 110. The head 300 is an iron-type golf club head. The hitting face 102 is flat. As shown in FIG. 25, the head 300 has a back cavity 114. The back cavity 114 forms a cavity space SP on the back side of the head 300. The head 300 has a back surface 116.

[0082] FIG. 26 is an exploded perspective view of the head 300. In FIG. 26, the weight body wt1 fixed to the head main body 120 is shown by a virtual line (two-dot chain line). In FIG. 26, the score lines gv on the face member 122 are omitted. FIG. 27 is a front view of the head main body 120 to which the weight body wt1 is attached. FIG. 28 is a perspective view of the head main body 120 as seen from the back side. FIG. 29 is a cross-sectional view taken along line AA in FIG. 24. FIG. 29 is a cross-sectional view at the toe-side end of the weight body wt1. FIG. 30 is a cross-sectional view taken along line BB in FIG. 24. FIG. 30 is a vertical cross-sectional view at the toe reference position Pt. FIG. 31 is a cross-sectional view taken along line CC in FIG. 24. FIG. 31 is a vertical cross-sectional view at the scoreline center position Pc. FIG. 32 is a cross-sectional view taken along line DD in FIG. 24. FIG. 32 is a vertical cross-sectional view at the heel-side end of the weight body wt1. FIG. 33 is a cross-sectional view taken along line EE in FIG. 24. Figure 33 is a vertical cross-sectional view at the heel reference position Ph. To make the cross-sectional positions easier to understand, the cross-sectional positions AA to EE are also shown in Figure 27. In Figure 27, the cross-sectional line at each cross-sectional position is indicated by a two-dot chain line.

[0083] The head 300 is formed of multiple members. In terms of components, the head 300 has a head body 120, a face member 122, and a weight body wt1. The face member 122 is fixed to the head body 120. The weight body wt1 is fixed to the head body 120. The head body 120 has a face opening 134. The face opening 134 penetrates the head body 120 in the face-back direction. The face opening 134 is closed by the face member 122.

[0084] The head main body 120 has a receiving surface 136. The receiving surface 136 faces the face side. The receiving surface 136 supports the peripheral edge of the face member 122 from the back side. In this embodiment, the receiving surface 136 is provided along the face opening 134 and outside the face opening 134. The receiving surface 136 is formed along an opening edge 138 of the face opening 134.

[0085] The head body 120 has a heel step surface 140. The heel step surface 140 extends forward from the receiving surface 136. The height of the heel step surface 140 corresponds to the thickness of the face member 122. The heel step surface 140 abuts against a side surface 142 on the heel side of the face member 122.

[0086] The head body 120 has a weight body insertion portion h1. A weight body wt1 is inserted into the weight body insertion portion h1. In this embodiment, the weight body insertion portion h1 is a recess. The weight body insertion portion h1 is open on the face side.

[0087] The face member 122 has a front surface 150 and a back surface 152. The front surface 150 constitutes at least a portion of the hitting face 102. In this embodiment, the front surface 150 constitutes the entire hitting face 102. The back surface 152 is the surface opposite the front surface 150. The peripheral edge of the back surface 152 abuts against the receiving surface 136. The back surface 152 faces the cavity space SP.

[0088] The weight body wt1 has a front surface 160, an upper surface 162, a lower surface 164, and a side surface 168. The side surface 168 has a toe side surface 168a and a heel side surface 168b. The front surface 160 faces the pocket space SP1. The front surface 160 constitutes an opposing surface facing the back surface 152 of the face member 122. The front surface 160 faces the back surface 152 via a space (cavity space SP, pocket space SP1). The lower surface 164 abuts against the inner surface of the weight body insertion portion h1. The side surface 168 abuts against the inner surface of the weight body insertion portion h1.

[0089] The weight body wt1 is inserted into the weight body insertion portion h1 from the face side (see the dashed arrow in FIG. 26). The weight body wt1 is fixed to the weight body insertion portion h1. As shown in FIGS. 29 to 32, a joint 170 is formed at the boundary between the weight body insertion portion h1 and the weight body wt1. In this embodiment, the joint 170 is a welded portion 172.

[0090] In this embodiment, the welded portion 172 is provided on the face side of the weight body wt1. The welded portion 172 is provided only on the face side of the weight body wt1. The welded portion 172 is provided only at a position facing the cavity space SP. The welded portion 172 is provided only at a position facing the pocket space SP1.

[0091] The weight body insert part h1 has a lower support part 180 that supports the underside of the weight body wt1 (see Figures 29 to 32). In this embodiment, the lower support part 180 is formed by the sole part 104. The lower support part 180 abuts against the lower surface 164 of the weight body wt1. The weight body insert part h1 has a toe side support part 182 that supports the toe side of the weight body wt1 (see Figure 26). The toe side support part 182 abuts against the toe side surface 168a of the weight body wt1. The weight body insert part h1 has a heel side support part 184 that supports the heel side of the weight body wt1. The heel side support part 184 abuts against the heel side surface 168b of the weight body wt1.

[0092] The weight body insertion portion h1 has an upper support portion 186 that supports the upper side of the weight body wt1. The upper support portion 186 abuts against the upper surface 162 of the weight body wt1. The upper support portion 186 has a continuous cross portion 186c that extends continuously from the toe-side support portion 182 to the heel-side support portion 184. The continuous cross portion 186c is formed on the back side. The continuous cross portion 186c abuts against the back-side edge of the upper surface 162 of the weight body wt1. The back side of this continuous cross portion 186c is connected to a wall portion 188 that constitutes the back surface 116 (see Figures 30 and 31).

[0093] The weight body insertion portion h1 has a notch 190 formed by removing a portion of the upper support portion 186. Where the notch 190 is formed, the weight body insertion portion h1 is open upward. The notch 190 forms a portion of the upper surface 162 of the weight body wt1 that does not abut against the weight body insertion portion h1. In the region where the notch 190 is present, the upper surface 162 of the weight body wt1 faces the cavity space SP defined by the back cavity 114. The notch 190 is formed on the face side (front side) of the continuous cross portion 186c. The head 300 of this embodiment differs from the previously described head 100 only in the configuration of the upper support portion 186 and the notch 190.

[0094] Note that this embodiment also includes a toe upper support portion 186a and a heel upper support portion 186b. As shown in FIG. 26 , the toe upper support portion 186a is provided on the toe side of a notch 190 formed in front of the continuous cross portion 186c. The heel upper support portion 186b is provided on the heel side of the notch 190 formed in front of the continuous cross portion 186c. The notch 190 is provided between the toe upper support portion 186a and the heel upper support portion 186b. The back side of the toe upper support portion 186a is connected to the continuous cross portion 186c. The back side of the heel upper support portion 186b is connected to the continuous cross portion 186c. The toe upper support portion 186a extends from the toe support portion 182 and supports the toe side end portion of the weight body wt1 from above. The heel upper support portion 186b extends from the heel side support portion 184 and supports the heel side end portion of the weight body wt1 from above. Note that the toe upper support portion 186a and the heel upper support portion 186b do not necessarily have to be provided.

[0095] 34 is an exploded perspective view of the head 400 of the fourth embodiment. The head 400 has a cover member 192. Except for the presence or absence of the cover member 192, the head 400 is the same as the head 100 of the first embodiment.

[0096] The cover member 192 covers the upper side of the weight body wt1. The cover member 192 covers the portion of the upper surface 162 of the weight body wt1 that is exposed to the cavity space SP by the notched portion 190. The cover member 192 covers the weight body wt1 so that the weight body wt1 is not visible from outside the head 400. An upper surface 192a of the cover member 192 faces the cavity space SP. The cover member 192 may be fixed to the weight body wt1 or may be fixed to the head main body 120.

[0097] The cover member 192 may be, for example, a plate-shaped member. The cover member 192 may be, for example, a badge. Examples of materials for the cover member 192 include resin, metal, and a combination thereof. From the viewpoint of not impairing the effect of the missing portion 190, it is preferable that the specific gravity of the cover member 192 be smaller than the specific gravity of the head main body 120. From this viewpoint, the specific gravity of the cover member 192 is preferably 3.0 or less, more preferably 2.0 or less, and still more preferably 1.5 or less. In consideration of available materials, the specific gravity of the cover member 192 is preferably 0.8 or more, more preferably 0.9 or more, and still more preferably 1.0 or more.

[0098] FIG. 35 is a cross-sectional view of a head 500 of the fifth embodiment. FIG. 35 is a cross-sectional view taken along the line DD described above. In the head 500, the weight body insertion portion h1 forms a through-hole that penetrates the head main body 120. However, a portion of the wall that forms this through-hole is missing as a missing portion 190. In addition, the weight body wt1 is exposed on the sole side and / or back side of the head 500. Except for the structures of the weight body insertion portion h1 and the weight body wt1, the head 500 is the same as the head 100.

[0099] The weight body insertion portion h1 forms a through-hole that opens to the face side and the back side. The weight body wt1 is inserted into this weight body insertion portion h1 from the face side. The weight body wt1 has an exposed surface 194 that forms the outer surface of the head. The exposed surface 194 forms part of the sole surface 104a and / or part of the back surface 116.

[0100] The weight body insertion portion h1 is configured to prevent the weight body wt1 from passing from the face side to the back side. When the weight body wt1 is inserted into the weight body insertion portion h1 from the face side, the weight body wt1 is locked in the weight body insertion portion h1 at a predetermined position in the face-back direction. The weight body insertion portion h1 has a main body tapered portion 196 that narrows toward the back side. The main body tapered portion 196 is composed of a first tapered surface 196a and a second tapered surface 196b, the opposing distance between which decreases toward the back side. The weight body wt1 has a tapered abutment surface 198 that abuts the main body tapered portion 196. The tapered abutment surface 198 is composed of a first surface 198a and a second surface 198b. The distance between the first surface 198a and the second surface 198b decreases toward the back side. The first surface 198a abuts the first tapered surface 196a. The second surface 198b abuts against the second tapered surface 196b. In this manner, the weight body insertion portion h1 may penetrate through the head main body 120.

[0101] FIG. 36(a) is a perspective view of the head main body 120 to which the weight body wt1 is fixed, according to the head 100 of the first embodiment. FIG. 36(b) is a perspective view of the head main body 120 to which the weight body wt1 is fixed, according to the head 200 of the second embodiment. FIG. 36(c) is a perspective view of the head main body 120 to which the weight body wt1 is fixed, according to the head 300 of the third embodiment. As described above, in each embodiment, the weight body wt1 is fixed by a joint 170. This joint 170 is a welded portion 172. In FIGS. 36(a), (b), and (c), the welded portion 172 is indicated by a thick solid line.

[0102] In each embodiment, the welded portion 172 is formed only around the periphery of the front surface 160 of the weight body wt1. In the first embodiment (FIG. 36(a)), a notched portion 190 penetrates the upper support portion 186 from the front end to the rear end. In this first embodiment, the welded portion 172 is formed in the portion excluding the notched portion 190. The welded portion 172 is formed in the portion extending from the toe upper support portion 186a through the toe side support portion 182, the lower support portion 180, and the heel side support portion 184 to the heel upper support portion 186b. This is the same in the third embodiment (FIG. 36(c)). In the third embodiment (FIG. 36(c)), the notched portion 190 is formed on the face side of the upper support portion 186. In this third embodiment as well, the welded portion 172 is formed in the portion excluding the notched portion 190. The welded portion 172 is formed in a portion extending from the toe upper support portion 186a through the toe side support portion 182, the lower side support portion 180, and the heel side support portion 184 to the heel upper support portion 186b.

[0103] In the second embodiment (FIG. 36(b)), the notched portion 190 is formed on the back side of the upper support portion 186. In this second embodiment, there is no notched portion 190 on the face side of the weight body wt1. In the second embodiment, the opening (insertion hole) on the face side of the weight body insertion portion h1 is a full-circumferential opening. A full-circumferential opening is an opening whose opening edge is formed around its entire periphery. In the second embodiment, the welded portion 172 is formed around the entire periphery.

[0104] In any embodiment, the joining portion 170 (welded portion 172) is formed in a state in which the face member 122 is not fixed to the head body 120. In a state in which the face member 122 is not present, the front of the weight body insertion portion h1 is open. Therefore, the joining operation can be easily performed.

[0105] The above-described embodiments provide the following advantages.

[0106] In the first to fifth embodiments, a missing portion 190 is provided. By providing the missing portion 190, the weight of the weight body insertion portion h1 can be reduced above the weight body wt1. By reducing the weight above the weight body wt1, the head can have a lower center of gravity. Furthermore, by distributing the excess weight created by the missing portion 190 to other locations, the design freedom for weight distribution of the head body 120 is improved. By distributing this excess weight below the head body 120, the head can have a lower center of gravity. By disposing this excess weight on the toe side and / or heel side of the head body 120, the moment of inertia of the head can be increased.

[0107] The head body 120 with the weight body insert portion h1 has a complex shape. The head body 120 is often manufactured by casting. When the head body 120 is manufactured by casting, the wall portion constituting the weight body insert portion h1 must be at least 2.5 mm thick to ensure castability. This thickness increases the weight required to form the weight body insert portion h1. Furthermore, as the weight body wt1 increases in size, the weight body insert portion h1 also increases in size, increasing the weight of the wall portion above the weight body insert portion h1. As the weight of the weight body insert portion h1 increases, the advantage of using the weight body wt1 in terms of center of gravity design decreases. Furthermore, because the wall portion above the weight body insert portion h1 is located above the weight body wt1, its contribution to lowering the center of gravity of the head is small. Providing the recess 190 reduces the weight above the weight body wt1, thereby further lowering the center of gravity of the head. Furthermore, the excess weight can be effectively created. This further promotes a lower center of gravity achieved by the weight body wt1. In addition, the degree of freedom in designing the center of gravity and weight distribution can be further increased.

[0108] In the first to fifth embodiments, the upper support portion 186 remains in the portion where the missing portion 190 is not formed. Therefore, the weight body wt1 does not slip out upward from the weight body insertion portion h1.

[0109] In the first, fourth, and fifth embodiments, the notched portion 190 penetrates the upper support portion 186 in the face-back direction (see FIG. 36(a)). This allows the area of ​​the notched portion 190 to be widened, further reducing the weight of the upper support portion 186. In addition, since the toe upper support portion 186a and the heel upper support portion 186b are provided on both sides of the weight body wt1, the weight body wt1 does not slip out upward from the weight body insertion portion h1.

[0110] In the second and third embodiments, the upper support portion 186 has a continuous cross portion 186c (see Figures 36(b) and (c)). This further enhances the fixation of the weight body wt1. In the second embodiment, the joint 170 (welded portion 172) is provided around the entire circumference of the weight body wt1. This further enhances the fixation of the weight body wt1. In the third embodiment, the rear edge of the weight body wt1 is covered from above by the continuous cross portion 186c (see Figures 30 and 31). From the outside of the head 300, the rear edge of the weight body wt1 is not visible. Furthermore, the gap between the rear edge of the weight body wt1 and the head main body 120 is not visible either. This can improve the aesthetic appearance of the head 300.

[0111] In the fourth embodiment, the exposed portion of the weight body wt1 formed by the cutout portion 190 is covered with a cover member 192. The weight body wt1 is not visible from the outside of the head 400. This can improve the appearance of the head 400.

[0112] In the first to fifth embodiments, the weight body wt1 is inserted into the weight body insertion portion h1 from the face side and is inserted to a position where it cannot move further toward the back side. Therefore, even if the joint portion 170 (welded portion 172) is only on the face side of the weight body wt1, the weight body wt1 is reliably fixed.

[0113] In FIG. 2, the width of the weight wt1 is indicated by a double-headed arrow D1. The width D1 is measured along the toe-heel direction. The width D1 is not limited. From the viewpoint of lowering the center of gravity, the width D1 may be set to 20 mm or more, further 30 mm or more, or even 40 mm or more. From the viewpoint of constraints imposed by the head dimensions, the width D1 may be set to 70 mm or less, further 65 mm or less, or even 60 mm or less.

[0114] The width of the missing portion 190 is indicated by a double-headed arrow D2 in FIG. 2. This width D2 is measured along the toe-heel direction. The width D2 is not limited. From the viewpoint of increasing the surplus weight, the width D2 is preferably 70% or more of the width D1, more preferably 75% or more of the width D1, more preferably 80% or more of the width D1, and even more preferably 85% or more of the width D1. From the viewpoint of ensuring the widths of the toe upper support portion 186a and the heel upper support portion 186b, the width D2 is preferably 95% or less of the width D1, more preferably 92% or less of the width D1, and even more preferably 90% or less of the width D1.

[0115] The sum of the width (width in the toe-heel direction) of the toe upper support portion 186a and the width (width in the toe-heel direction) of the heel upper support portion 186b is the difference (D1-D2). From the viewpoint of the fixation of the weight wt1, the difference (D1-D2) is preferably 5% or more of the width D1, more preferably 8% or more of the width D1, and more preferably 10% or more of the width D1. From the viewpoint of ensuring the width D2 of the missing portion 190, the difference (D1-D2) is preferably 30% or less of the width D1, more preferably 25% or less of the width D1, more preferably 20% or less of the width D1, and more preferably 15% or less of the width D1.

[0116] In FIG. 19 , the double-headed arrow D3 indicates the width of the continuous transverse portion 186c provided on the face side. The width D3 is measured along the face-back direction. The width D3 is measured on the top surface of the continuous transverse portion 186c. From the viewpoints of the penetration amount during welding and suppression of deformation during welding, the width D3 is preferably 4 mm or more, more preferably 4.5 mm or more, and more preferably 5 mm or more. From the viewpoint of reducing the weight of the upper support portion 186, the width D3 is preferably 12 mm or less, more preferably 10 mm or less, and more preferably 8 mm or less. From the viewpoint of castability, the thickness of the continuous transverse portion 186c provided on the face side is preferably 2.5 mm or more, more preferably 2.6 mm or more, and more preferably 2.7 mm or more. From the viewpoint of reducing the weight of the upper support portion 186, the thickness of the continuous transverse portion 186c provided on the face side is preferably 6.0 mm or less, more preferably 5.5 mm or less, and more preferably 5.0 mm or less.

[0117] In FIG. 30 , the double-headed arrow D4 indicates the width of the continuous transverse portion 186c provided on the back side. The width D4 is measured along the face-back direction. The width D4 is measured on the top surface of the continuous transverse portion 186c. From the viewpoint of hiding the rear end of the weight body wt1, the width D4 is preferably 2 mm or more, more preferably 2.5 mm or more, and even more preferably 3 mm or more. From the viewpoint of reducing the weight of the upper support portion 186, the width D4 is preferably 10 mm or less, more preferably 8 mm or less, and even more preferably 6 mm or less. From the viewpoint of castability, the thickness of the continuous transverse portion 186c provided on the back side is preferably 2.5 mm or more, more preferably 2.6 mm or more, and even more preferably 2.7 mm or more. From the viewpoint of reducing the weight of the upper support portion 186, the thickness of the continuous transverse portion 186c provided on the back side is preferably 6.0 mm or less, more preferably 5.5 mm or less, and even more preferably 5.0 mm or less.

[0118] In the second embodiment, the continuous transverse portion 186c is formed closest to the face side. In this case, the continuous transverse portion 186c forms an insertion hole for the weight body insertion portion h1. In the third embodiment, the continuous transverse portion 186c is formed closest to the back side. In this case, the back side of the continuous transverse portion 186c is connected to other portions of the head main body (for example, the wall portion 188 described above). Unlike the second and third embodiments, the continuous transverse portion 186c may be disposed at an intermediate position in the face-back direction. In this case, missing portions 190 are formed on the face side and the back side of the continuous transverse portion 186c.

[0119] From the viewpoint of lowering the center of gravity, the excess weight created by the cutout 190 is preferably 5 g or more, more preferably 7 g or more, and even more preferably 9 g or more. From the viewpoint of constraints imposed by the head dimensions, the excess weight created by the cutout 190 is preferably 20 g or less, more preferably 18 g or less, and even more preferably 16 g or less. It can be said that this excess weight is reduced from the weight of the upper support portion 186 by the cutout 190. When the area of ​​the weight body wt1 exposed by the cutout 190 is M (cm 2 ), the thickness of upper support portion 186 is t (cm), and the specific gravity of upper support portion 186 is S, then this excess weight (grams) is calculated by M×t×S. As described above, a portion of upper surface 162 of weight body wt1 is exposed to cavity space SP. The area of ​​this exposed portion is M. Thickness t is the thickness of upper support portion 186 that remains in the portion where notch 190 is not formed. If the thickness of upper support portion 186 is not constant, thickness t is taken as the average thickness. This average thickness is calculated by dividing the volume of upper support portion 186 by the area of ​​upper surface 162 that is covered by upper support portion 186.

[0120] From the viewpoint of lowering the center of gravity, the ratio of the excess weight to the head weight is preferably 2% or more, more preferably 2.5% or more, more preferably 3% or more, and still more preferably 3.5% or more. Considering the dimensional limitations of the weight insertion portion h1, the ratio of the excess weight to the head weight is preferably 10% or less, more preferably 9% or less, and still more preferably 8% or less.

[0121] From the viewpoint of lowering the center of gravity, it is preferable that the center of gravity of the weight body wt1 be located below the center of gravity of the head. From the viewpoint of lateral MI, it is preferable that the center of gravity of the weight body wt1 be located closer to the toe than the face center Fc. In this case, the weight of the hosel 108 located on the heel side and the weight of the weight body wt1 located on the toe side distribute the weight in the toe-heel direction. lateral MI is the moment of inertia about an axis extending in the vertical direction through the center of gravity of the head.

[0122] A method for manufacturing the heads 100, 200, 300, 400, and 500 of the above-described embodiments can include the following steps (1) to (3). (1) A first step of inserting the weight body wt1 from the face side of the weight body insertion portion h1 into the head main body 120 before the face member 122 is attached. (2) A second step of forming a joint 170 (welded portion 172) at the boundary between the weight body wt1 and the weight body insertion portion h1 on the face side of the weight body wt1 of the member obtained in the first step. (3) A third step of attaching the face member 122 to the head body 120 from the member obtained in the second step.

[0123] The following notes are part of the invention contained in this application. [Appendix 1] A golf club head having a striking face and a sole surface, The head has a head body having a face opening and a weight body insertion portion, a face member that closes the face opening and constitutes at least a part of the striking face, a weight body that is inserted into and fixed to the weight body insertion portion from the face side, and a joint portion formed at the boundary between the weight body insertion portion and the weight body, a golf club head in which the weight body insertion portion has a lower support portion that supports the underside of the weight body, a toe side support portion that supports the toe side of the weight body, a heel side support portion that supports the heel side of the weight body, an upper support portion that supports the upper side of the weight body, and a missing portion formed by missing a part of the upper support portion. [Appendix 2] the upper support portion has a toe upper support portion extending from the toe side support portion and supporting a toe side end portion of the weight body from above, and a heel upper support portion extending from the heel side support portion and supporting a heel side end portion of the weight body from above, 2. The golf club head according to claim 1, wherein the recess is formed between the toe upper support portion and the heel upper support portion. [Appendix 3] 3. The golf club head according to claim 1, wherein the notched portion penetrates the upper support portion in a face-to-back direction. [Appendix 4] the upper support portion has a continuous transverse portion extending continuously from the toe side support portion to the heel side support portion, 3. The golf club head according to claim 1, wherein the notched portion is formed on the face side and / or the back side of the continuous crossing portion. [Appendix 5] the face member has a front surface that constitutes at least a portion of the striking face and a back surface that is the surface opposite to the front surface, the weight body has a front surface that is a face side, 5. The golf club head according to claim 1, wherein the back surface of the face member faces the front surface of the weight body via a space. [Explanation of symbols]

[0124] 100, 200, 300, 400, 500...golf club heads 102 Striking face 104···Sole part 104a···Sole surface 108···Hosel 114 Back cavity 116···Back side 120···Head body 122 Face member 134···Face opening 150....Front of face member 152 Back surface of face member 170...joint 172 Welded section 180 Lower support portion of heavy body insertion portion 182... Toe side support portion of weight insertion portion 184...Heel side support part for inserting weight body 186...Upper support portion of heavy body insertion portion 186a···Upper toe support 186b···Upper heel support part 186c Continuous cross section 190... Missing part 192 Cover member Fc···Face Center SP...cavity space SP1...Pocket space h1: Weight insertion part wt1: Heavy body gv...score line gv1...Longest scoreline Pt Toe reference position Pc...Score line center position Ph···Heel reference position Le... Leading Edge Te Trailing Edge

Claims

1. A golf club head having a striking face and a sole surface, The head has a head body having a face opening and a weight body insertion portion, a face member that closes the face opening and constitutes at least a part of the striking face, a weight body that is inserted into and fixed to the weight body insertion portion from the face side, and a joint portion formed at the boundary between the weight body insertion portion and the weight body, A golf club head in which the weight body insertion portion has a lower support portion that supports the underside of the weight body, a toe side support portion that supports the toe side of the weight body, a heel side support portion that supports the heel side of the weight body, an upper support portion that supports the upper side of the weight body, and a missing portion formed by missing a part of the upper support portion.

2. the upper support portion has a toe upper support portion extending from the toe side support portion and supporting a toe side end portion of the weight body from above, and a heel upper support portion extending from the heel side support portion and supporting a heel side end portion of the weight body from above, 2. The golf club head according to claim 1, wherein the notch is formed between the toe upper support portion and the heel upper support portion.

3. 3. The golf club head according to claim 2, wherein the notch penetrates the upper support portion in the face-to-back direction.

4. the upper support portion has a continuous transverse portion extending continuously from the toe side support portion to the heel side support portion, 3. The golf club head according to claim 1, wherein the notched portion is formed on the face side and / or the back side of the continuous crossing portion.

5. the face member has a front surface that constitutes at least a portion of the striking face and a back surface that is the surface opposite to the front surface, the weight body has a front surface that is a face side, 4. The golf club head according to claim 1, wherein the back surface of the face member faces the front surface of the weight body via a space.

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