Golf Club Head

Abstract

To enhance face repulsion performance while keeping joint strength between a face member and a head body.SOLUTION: A golf club head 1 comprises a face 2 for hitting a ball, including a face center FC, and includes a head body 100, and a face member 200. The head body 100 comprises a face support part 110 for fixing the face member 200, on the side of the head front. The face member 200 includes a front plate part 201, a first folded part 202 extending to the head rear from the front plate part 201, and a second folded part 203 extending to the side of the face center FC from the first folded part 202. A front surface 201a of the front plate part 201 forms at least a portion of the face 2. A rear surface 203d of the second folded part 203 is fixed to the face support part 110 of the head body.SELECTED DRAWING: Figure 4

Description

[Technical field]

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

[0002] Patent Document 1 below describes an iron-type golf club head that is configured by joining a face member and a face support portion. The face member and the face support portion are made of different metal materials.

[0003] The face member includes an outer periphery having a large thickness, and a central portion surrounded by the outer periphery and having a smaller thickness than the outer periphery. The face receiving portion is provided with a face mounting portion on the front side to which the face member is attached. The face mounting portion has a generally stepped cross section including an inward surface facing the center of the head and a forward surface facing the face. The outer periphery of the face member is disposed to face the inward surface, and the back surface of the face member is disposed to face the forward surface. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2015-27373 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the golf club head described in Patent Document 1, the flexure of the outer periphery of the face member when hitting a ball is hindered, leaving room for further improvement in the repulsion properties of the face.

[0006] The present invention has been devised in consideration of the above-mentioned problems, and its main object is to provide a golf club head that can improve the repulsion performance of the face while maintaining the bonding strength between the face member and the head body. [Means for solving the problem]

[0007] The present invention is a golf club head having a face for hitting a ball, including a face center, the golf club head including a head body and a face member, the head body having a face support portion on the front side of the head for fixing the face member, the face member including a front plate portion, a first return portion extending from the front plate portion toward the rear of the head, and a second return portion extending from the first return portion toward the face center side, the front surface of the front plate portion forms at least a part of the face, and the rear surface of the second return portion is fixed to the face support portion of the head body.

[0008] In another aspect of the present invention, the outer circumferential surface of the first folded portion of the face member may not be fixed to the head body.

[0009] In another aspect of the present invention, the first folded portion can have a thickness of 0.5 to 4.0 mm.

[0010] In another aspect of the present invention, the first folded portion may have a thickness of 2.0 mm or less.

[0011] In another aspect of the present invention, the second folded portion may protrude toward the center of the face further than the face support portion.

[0012] In another aspect of the present invention, the head body may include a peripheral weight portion that protrudes toward the center of the face at a position spaced a distance from the second return portion toward the rear of the head.

[0013] In another aspect of the present invention, the peripheral weight portion may protrude toward the face center side beyond the second return portion.

[0014] In another aspect of the present invention, the first and second returning portions may be provided on at least one of an upper portion, a lower portion, a toe side portion, and a heel side portion of the face member.

[0015] In another aspect of the present invention, a protrusion that protrudes toward the rear of the head may be provided on a rear surface of the second folded portion, and a recess into which the protrusion is fitted may be formed in the face support portion.

[0016] In another aspect of the present invention, the face member may be made of titanium or a titanium alloy, and the head body may be made of stainless steel.

[0017] In another aspect of the present invention, the face member and the head body may be joined by brazing.

[0018] In another aspect of the present invention, the head may be an iron type golf club head. Effect of the Invention

[0019] By adopting the above-mentioned configuration, the golf club head of the present invention can improve the repulsion of the face while maintaining the bonding strength between the face member and the head body. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a front view of the golf club head of the present embodiment. [Diagram 2] FIG. 2 is a side view of the golf club head of the present embodiment as viewed from the toe side. [Diagram 3] 1 is a front perspective view of a golf club head according to an embodiment of the present invention. FIG. [Figure 4] 1 is an exploded perspective view of a golf club head according to an embodiment of the present invention; [Diagram 5] FIG. 2 is a perspective view of the face member as viewed from the rear side. [Figure 6] FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. [Figure 7]FIG. 7 is an enlarged view of a main part of FIG. 6. [Figure 8] FIG. 11 is an exploded perspective view of a golf club head according to another embodiment of the present invention. [Figure 9] FIG. 11 is an exploded perspective view of a golf club head according to still another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The exemplary embodiments disclosed below are not intended to be limiting in any manner. Furthermore, the embodiments of the present invention can be used alone or in various combinations. Furthermore, the same or common elements are designated by the same reference numerals throughout this specification, and duplicated descriptions are omitted.

[0022] 1 to 3 are respectively a front view, a side view from the toe side, and a perspective view of a golf club head (hereinafter sometimes simply referred to as "head") 1 of this embodiment. As shown in Figs. 1 to 3, the head 1 of this embodiment is preferably embodied as, for example, an iron-type golf club head. In other forms, the head 1 may be configured as a wood-type, putter-type, or utility-type.

[0023] The head 1 includes, for example, a face 2, a top 3, a sole 4, a toe 5, a heel 6, and a hosel 7. In addition, in Figures 1 to 3, the head 1 is in a reference state.

[0024] [Reference condition] In this specification, the "reference state" of the head 1 refers to a state in which the scorelines 8 formed on the face 2 are parallel to the horizontal plane HP, and the head 1 is placed on the horizontal plane HP. In this reference state, the central axis CL (axis of the club shaft) of the shaft insertion hole 7a of the hosel 7 of the head 1 is disposed within the reference vertical plane VP. The reference vertical plane VP is a plane perpendicular to the horizontal plane HP. In this reference state, the scorelines 8 are parallel to the horizontal plane HP and also parallel to the reference vertical plane VP. Unless otherwise specified, the head 1 is considered to be placed in the reference state.

[0025] [Definition of each direction] The front-to-back direction of the head 1 is the direction perpendicular to the reference vertical plane VP. In this case, the front side of the head 1 means the side of the face 2 that strikes the ball, and the rear side of the head 1 means the opposite side. The up-down direction of the head 1 is the direction perpendicular to the horizontal plane HP, and the "upper side" and "lower side" of the head 1 respectively mean the "upper side" and "lower side" in the vertical direction. The toe-heel direction of the head 1 is the direction parallel to the horizontal plane HP and perpendicular to the front-to-back direction of the head 1.

[0026] [Basic head structure] The face 2 is a surface for hitting a ball. In the case of the iron-type head of this embodiment, the face 2 is substantially flat. The face 2 is provided with a plurality of scorelines 8 in order to increase friction with the ball. The scorelines 8 are grooves formed on the face 2 and extending in the toe-heel direction.

[0027] The face 2 includes a face center FC. For example, in the case of an iron-type head 1 of this embodiment, the face center FC is defined as the geometric center (area center of gravity) of the face 2. In addition, in the case of a wood-type head, the face center FC is defined as a midpoint between the face length in the up-down direction and the face length in the left-right direction.

[0028] The top 3 extends from the upper edge of the face 2 toward the rear of the head 1 so as to constitute, for example, an upper surface portion of the head 1. The top 3 may be called a crown or an upper portion.

[0029] The sole 4 extends from the lower edge of the face 2 toward the rear of the head 1 so as to form a lower surface portion of the head 1. The sole 4 may be referred to as a lower part.

[0030] The toe 5 is an end portion away from the hosel 7 in the toe-heel direction of the head 1, and smoothly connects between the top 3 and the sole 4. The heel 6 is an end portion located on the opposite side to the toe 5 in the toe-heel direction of the head 1, and the hosel 7 is connected thereto.

[0031] The hosel 7 is, for example, cylindrical, and has a shaft insertion hole 7a for receiving a club shaft (not shown). The central axis CL of the shaft insertion hole 7a essentially coincides with the axial center line of the club shaft (not shown) when the club shaft is fixed.

[0032] 1 to 4, the head 1 of the present embodiment includes, for example, a head body 100 and a face member 200. The face member 200 is disposed in front of the head body 100 and constitutes a part of the face 2.

[0033] [Head body] In a preferred embodiment, the head body 100 is formed of a metal material different from that of the face member 200. For the head body 100, stainless steel is suitable in consideration of, for example, the provision of an appropriate weight, strength, corrosion resistance, castability, and the like.

[0034] 4, the head body 100 of this embodiment has a recess O recessed toward the rear of the head, for example, on its front side. The recess O of this embodiment is an opening that penetrates the head body 100 in the front-rear direction. In another aspect, the recess O may be a recess that is closed on the rear side of the head.

[0035] In the head body 100 of this embodiment, the rear portions of the top 3, toe 5, and sole 4 are formed around the recess O. The head body 100 also includes a hosel 7 integrally via a heel 6. It is desirable that each portion of the head body 100 as described above be integrally formed by, for example, casting.

[0036] The head body 100 also includes a face support portion 101 for fixing the face member 200 on the head front side. The face support portion 101 is formed along the inner periphery of the recess O. The face support portion 101 of this embodiment includes, for example, a top-side support portion 103, a sole-side support portion 104, and a toe-side support portion 105. Each of the support portions 103, 104, and 105 includes, for example, a support surface 101a that forms a plane extending substantially parallel to the face 2.

[0037] [Face member] Fig. 5 is a perspective view of the face member 200 as viewed from the rear side. Fig. 6 is a cross-sectional view taken along line VI-VI in Fig. 1. Fig. 7 is an enlarged view of a main portion on the sole side of Fig. 6. For ease of understanding, Fig. 6 illustrates the face 2 as being vertical. As shown in Figs. 5 to 7, the face member 200 includes a front plate portion 201, a first returning portion 202 extending from the front plate portion 201 toward the rear of the head, and a second returning portion 203 extending from the first returning portion 202 toward the face center FC (shown in Fig. 1).

[0038] 1 and 4, the front plate portion 201 of this embodiment forms from the top 3 to the sole 4 in the up-down direction of the face 2. Moreover, the front plate portion 201 of this embodiment forms from the toe 5, past the face center FC toward the heel 6, to a position just before the hosel 7 in the toe-heel direction of the face 2. Therefore, the front plate portion 201 of this embodiment forms the front portions of each of the top 3, toe 5, and sole 4.

[0039] The front plate portion 201 includes a front surface 201a and a rear surface 201b. The front surface 201a constitutes at least a part of the face 2. In a preferred embodiment, the front surface 201a of the front plate portion 201 forms a major portion of the face 2, for example, forming 40% or more, preferably 50% or more, of the area of ​​the face 2. In a particularly preferred embodiment, as shown in FIG. 1, the front surface 201a of the front plate portion 201 includes the face center FC and forms all of the intended hitting area in which the scorelines 8 are formed.

[0040] 4 to 6, the first returned portion 202 extends, for example, from the outer peripheral edge 201c of the front plate portion 201 toward the rear of the head. The first returned portion 202 of this embodiment includes, for example, a top-side first returned portion 202a, a toe-side first returned portion 202b (FIG. 4), and a sole-side first returned portion 202c. In a preferred embodiment, the first returned portions 202a, 202b, and 202c are continuous without interruption.

[0041] In this embodiment, the first folded portion 202 is not provided on the edge on the heel side of the front plate portion 201. In another aspect, the first folded portion 202 may also be provided on the edge on the heel side of the face member 200.

[0042] The second returning portion 203 extends from the first returning portion 202 toward the face center FC. As shown in Fig. 6, the second returning portion 203 of this embodiment is located at a distance of length L from the rear surface 201b of the front plate portion 201 toward the rear of the head. This length L is defined as the length of the first returning portion 202 in the front-to-rear direction of the head. Also, as shown in Fig. 5, the second returning portion 203 of this embodiment includes, for example, a top-side second returning portion 203a, a toe-side second returning portion 203b, and a sole-side second returning portion 203c.

[0043] In a preferred embodiment, the second folded portions 203a, 203b, and 203c are continuous without interruption. In another embodiment, the second folded portions 203a, 203b, and 203c may be spaced apart from each other.

[0044] The face member 200 is preferably made of a metal material having a high specific strength, such as titanium or a titanium alloy.

[0045] [Adhesion between face material and head body] As shown in FIGS. 6 and 7, in the head 1 of this embodiment, the rear surface 203d of the second folded portion 203 is fixed to the face support portion 101 of the head body 100.

[0046] In general, in order to increase the joint strength between the face member 200 and the head body 100, it is important to increase the joint area between them. To achieve this, as shown in FIG. 6, the width W1 of the face support portion 101 and the width W2 of the second folded portion 203 tend to be inevitably large, but such an improvement does not affect the rigidity of the first folded portion 202 of the face member 200. In other words, the head 1 of this embodiment makes it possible to thin the first folded portion 202 while increasing the joint strength between the face member 200 and the head body 100. This allows the front plate portion 201 to be largely deflected when hitting a ball, thereby improving the repulsion of the face. The width W1 of the face support portion 101 is measured in a direction perpendicular to the outer circumferential surface of the head body 100. Similarly, the width W2 of the second folded portion 203 is measured in a direction perpendicular to the outer circumferential surface of the face member 200.

[0047] 6, in a preferred embodiment of the head 1 of this embodiment, an outer circumferential surface 100E around the face 2 of the head body 100 and an outer circumferential surface 200E of the face member 200 are continuous and flush with each other to form the outer surface of the head 1. In a preferred embodiment, the outer circumferential surface of the first folded portion 202 of the face member 200 (the outer circumferential surface 200E of the face member 200) is not fixed to the head body 100. In this embodiment, the outer circumferential portion of the face member 200 is not restrained by the head body 100, so that the face member 200 is more likely to bend when hitting a ball, which in turn improves the repulsion of the face.

[0048] [Thickness of the first folded part t1] In order to further improve the repulsion of the face by thinning the first returning portion 202, the thickness (minimum thickness) t1 of the first returning portion 202 is set to, for example, 4.0 mm or less, preferably 3.0 mm or less, and more preferably 2.0 mm or less, as shown in Fig. 7. On the other hand, if the thickness t1 of the first returning portion 202 is excessively small, the durability of the face member 200 may be impaired, so the thickness t1 is set to, for example, 0.5 mm or more, preferably 1.0 mm or more, and more preferably 1.3 mm or more. In this embodiment, the thickness t1 of the first returning portion 202 is set to 1.4 mm.

[0049] [Length of first return part L] Forming the first returning portion 202 long promotes the bending of the first returning portion 202 when hitting a ball. Therefore, in order to further increase the face repulsion, the length L of the first returning portion 202 in the direction perpendicular to the face 2 is set to 0.5 mm or more, preferably 1.0 mm or more, and more preferably 1.5 mm or more, as shown in Figs. 6 and 7. On the other hand, if the length L of the first returning portion 202 is excessively large, the durability of the face member 200 may be impaired, so the length L is set to, for example, 4.0 mm or less, preferably 3.5 mm or less, and more preferably 3.0 mm or less. In this embodiment, the length L of the first returning portion 202 is set to 1.7 mm.

[0050] [Thickness of the second folded part t2] In order to further improve the repulsion of the face, as shown in Fig. 6, the thickness (minimum thickness) t2 of the second returning portion 203 in the direction perpendicular to the face 2 is set to, for example, 2.5 mm or less, preferably 2.3 mm or less, and more preferably 2.0 mm or less. On the other hand, if the thickness t2 of the second returning portion 203 is excessively small, the durability of the face member 200 may be impaired, so the thickness t2 is set to, for example, 0.5 mm or more, preferably 1.0 mm or more, and more preferably 1.3 mm or more. In this embodiment, the thickness t2 of the second returning portion 203 is set to 1.5 mm.

[0051] [Front panel thickness t3] Reducing the thickness t2 of the front plate portion 201 promotes the flexure of the front plate portion 201 when hitting a ball. Therefore, in order to further increase the face repulsion, the thickness (minimum thickness) t3 of the front plate portion 201 is set to, for example, 3.5 mm or less, preferably 3.3 mm or less, and more preferably 3.0 mm or less. On the other hand, if the thickness t3 of the front plate portion 201 is excessively small, the durability of the face member 200 may be impaired, so the thickness t3 is set to, for example, 1.7 mm or more, preferably 2.0 mm or more, and more preferably 2.2 mm or more. In this embodiment, the thickness t3 of the front plate portion 201 is set to 2.4 mm.

[0052] In this embodiment, the head body 100 is made of stainless steel, and the face member 200 is made of titanium alloy. With such a combination of metal materials, it is difficult to obtain a practical joint strength required for a head by welding. In view of this, in the head 1 of this embodiment, the head body 100 and the face member 200 are joined by brazing. For example, brazing is performed by interposing a brazing material between the head body 100 and the face member 200 and melting and solidifying the brazing material to join the two.

[0053] 7, the second folded portion 203 may protrude toward the face center FC further than the face support portion 101. According to this embodiment, when the brazing material interposed between the head body 100 and the face member 200 becomes fluid, the brazing material is prevented from flowing between the front plate portion 201 of the face member 200 and the second folded portion 203. Therefore, according to this embodiment, there is an advantage that it is possible to provide a head 1 having an excellent appearance when finished.

[0054] In a particularly preferred embodiment, the head body 100 is desirably provided with a peripheral weight portion 106 that protrudes toward the face center FC at a position spaced a distance behind the head from the second returning portion 203. According to this embodiment, more weight is distributed to the peripheral portion of the head 1, and the moment of inertia of the head 1 is increased.

[0055] Furthermore, since a groove-shaped recess G is formed between the second returned portion 203 and the peripheral weight portion 106, when the brazing material interposed between the head body 100 and the face member 200 becomes fluid, it can be retained in this recess G. Therefore, in this embodiment, the brazing material can be more reliably prevented from flowing between the front plate portion 201 and the second returned portion 203 of the face member 200. Therefore, according to this embodiment, it is possible to provide a head 1 with an even more excellent finished appearance. To further enhance this effect, the peripheral weight portion 106 may protrude toward the face center FC side more than the second returned portion 203.

[0056] In order to increase the bonding strength between the head body 100 and the face member 200, for example, a protrusion 205 that protrudes toward the rear of the head may be provided on the rear surface 203d of the second folded portion 203. Also, a recess 110 into which the protrusion 205 is fitted may be formed in the face support portion 101. In such an embodiment, the bonding area between the head body 100 and the face member 200 can be increased, and the bonding strength between them can be increased. In addition, these protrusions 205 and recesses 110 are useful for accurately positioning the head body 100 and the face member 200 when they are bonded together.

[0057] In this embodiment, the protrusion 205 is in the form of a rib that extends continuously along the outer periphery of the face member 200. In another embodiment, the protrusion 205 may be composed of, for example, a plurality of protrusions that are intermittently provided along the outer periphery of the face member 200. Similarly, the recess 110 provided in the face support portion 101 of the head body 100 is in the form of a groove that extends continuously in correspondence with the protrusion 205. In another embodiment, the recess 110 may be composed of a plurality of recesses that are intermittently provided. Note that a recess may be provided on the side of the second folded portion 203 of the face member 200, and a protrusion may be provided on the side of the face support portion 101 (not shown).

[0058] [Other embodiments] In the above embodiment, the first and second returning portions 202 and 203 are preferably provided on the upper portion (top 3 side), the lower portion (sole 4 side), and the toe side of the face member 200. However, the present invention is not limited to such an embodiment, and may be modified in various ways. For example, the first and second returning portions 202 and 203 may be provided on at least one of the upper portion (top 3), the lower portion (sole 4), the toe side portion (part on the toe 5 side), and the heel side portion (part on the heel 6 side) of the face member 200. In addition, when the first and second returning portions 202 and 203 are provided on at least one of the above-mentioned portions (for example, the lower portion) of the face member 200, the first and second returning portions 202 and 203 do not need to be provided on the entire lower portion of the face member 200, but may be provided on at least a part of the lower portion. Hereinafter, some other embodiments will be described.

[0059] Fig. 8 shows an exploded perspective view of the head 1 as another embodiment of the present invention. As shown in Fig. 8, the face member 200 includes an embodiment that does not reach the toe 5. In this embodiment, the front plate portion 201 of the face member 200 constitutes the central portion of the face 2 in the toe-heel direction, and is configured to have a shorter length in the toe-heel direction than the face member 200 shown in Fig. 4.

[0060] In the face member 200 of this embodiment, the first returning portion 202 and the second returning portion 203 are provided on the upper portion (top 3) and lower portion (sole 4) of the face member 200, and are not provided on the edge on the toe side or the edge on the heel side. Even in this embodiment, the repulsion of the face 2 can be improved over a wide range in the up-down direction.

[0061] Fig. 9 shows an exploded perspective view of a head 1 as another embodiment of the present invention. The head 1 shown in Fig. 9 differs from the embodiment of Fig. 8 in that the first return portion 202 and the second return portion 203 are provided only on the lower portion (sole 4) of the face member 200, and are not provided on the edges of the upper portion, toe, and heel. In this embodiment, the area with high face repulsion can be expanded to a lower area of ​​the face 2. Since iron-type golf club heads often have the opportunity to hit a ball placed directly on the ground, it is of great significance to increase the repulsion of the sole 4 side of the face 2.

[0062] Although not shown, the present invention encompasses a configuration in which the first return portion 202 and the second return portion 203 in the face member 200 are provided only on the edges extending vertically on the toe side of the face member 200, or a configuration in which they are provided only on the edges extending vertically on the heel side.

[0063] Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above specific disclosure, and can be implemented in various modified forms within the scope of the technical ideas described in the claims. EXAMPLES

[0064] Iron-type golf club heads having the basic structures of Figs. 1 to 6 were prototyped based on the specifications in Table 1, and their face repulsion and durability (bonding strength between the face member and the head body) were tested. The face member was made of titanium alloy (6-4 titanium), and the head body was made of stainless steel (SUS630). The comparative example was the configuration shown in Fig. 4 of Patent Document 1. In this head, the outer peripheral surface of the face member is also supported by the head body. Details of each part of head 1 are as shown in Table 1. The test method was as follows.

[0065] [Face repulsion test] The COR was measured at the center of the face and at positions 5 mm above, below, left and right from the center of the face (a total of five positions). COR means the coefficient of restitution, and was measured based on the "Interim Procedure for Measuring the Coefficient of Restitution of an Iron Clubhead Relative to a Baseline Plate Revision 1.3 January 1, 2006" stipulated by the USGA (United States Golf Association). The evaluation was the average value of the COR at the above five positions, and is an index with the value of Example 1 being 100. The larger the value, the better the face resilience.

[0066] [Durability test] The same FRP club shaft was attached to each sample head to create an iron-type golf club (total length 38 inches), which was then attached to a swing robot. The head speed was adjusted to 41 m / s and a golf ball was hit with each club, and the number of hits until peeling occurred at the joint between the head body and the face member was counted. The peeling was visually observed every 100 hits. The results are expressed as an index, with the number of hits in Example 1 being 100, and a higher value indicates better durability.

[0067] [Table 1]

[0068] As a result of the test, it was confirmed that the head of the embodiment can improve the repulsion performance of the face while maintaining the bonding strength between the face member and the head body. [Explanation of symbols]

[0069] 1 Head 2 Face 100 Head body 101 Face support part 106 Peripheral weight section 110 Recess 200 Face member 201 Front plate part 201a Front of front panel 201b Rear surface of front panel 202 First return part 203 Second return part 203d Rear surface of second return 205 Protrusion FC Face Center

Claims

1. A golf club head having a face for striking a ball, the face center comprising: The head includes a head body and a face member. the head body includes a face support portion for fixing the face member on a head front side, the face member includes a front plate portion, a first folded portion extending from the front plate portion toward the rear of the head, and a second folded portion extending from the first folded portion toward a face center side, a front surface of the front plate portion forms at least a part of the face, a rear surface of the second folded portion is fixed to the face support portion of the head body, the head body includes a peripheral weight portion protruding toward a center of the face at a position spaced a distance from the second return portion toward the rear of the head, the second folded portion protrudes toward the face center side more than the face support portion such that a groove-shaped recess is formed between the second folded portion and the peripheral weight portion, The face member and the head body are joined by brazing. Golf club head.

2. 2. The golf club head according to claim 1, wherein an outer peripheral surface of the first return portion of the face member is not fixed to the head body.

3. 3. The golf club head according to claim 1, wherein the first return portion has a thickness of 0.5 to 4.0 mm.

4. 4. The golf club head according to claim 3, wherein the first return portion has a thickness of 2.0 mm or less.

5. 5. The golf club head according to claim 1, wherein the peripheral weight portion protrudes toward the center of the face further than the second return portion.

6. 6. The golf club head according to claim 1, wherein the first and second return portions are provided on at least one of an upper portion, a lower portion, a toe side portion and a heel side portion of the face member.

7. A protrusion protruding toward the rear of the head is provided on a rear surface of the second folded portion, 7. The golf club head according to claim 1, wherein the face support portion is formed with a recess into which the protrusion is fitted.

8. 8. The golf club head according to claim 1, wherein the face member is made of titanium or a titanium alloy, and the head body is made of stainless steel.

9. 9. The golf club head according to claim 1, which is an iron type golf club head.

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