TWM281669U - Golf club head - Google Patents

Description

M281669 8. Description of the new type: [Technical field to which the new type belongs] This creation is about hollow golf club heads, and especially golf club heads or similar golf club heads. [Prior art]

Hollow metal products are widely used as wood-type golf club heads such as driver and fairway wood. A hollow wood-type golf club head generally has a front portion for hitting a ball, a top portion constituting an upper surface portion of the golf club head, a bottom portion constituting a bottom face portion of the golf club head, a tip side constituting a golf club head, and The side part of the side part of the side and the heel side, and the sheath part. The rod is inserted into the hosel portion and fixed with an adhesive or the like. Recently, a golf club called a multifunctional club has also been sold in the market in large quantities. As one of the multifunctional golf clubs, it has a similarity to the above-mentioned wooden golf club head (that is, it has a front part, a bottom part, Side, top, and hosel sections) There are also many types of golf clubs on the market. As the metal constituting the hollow golf club head, aluminum alloy, stainless steel, or titanium alloy is used, and titanium alloy has been widely used in recent years. By increasing the volume of the hollow golf club head, the sweet spot can be increased. In order to prevent a golf club head from increasing in weight with an increase in volume, it is considered to use a fiber-reinforced resin having a smaller specific gravity than the above-mentioned metal as a constituent material of the golf club head. At this time, in order to ensure the strength, the front face of the ball must be made of metal, and the parts other than the front face are made of fiber-reinforced resin. A type of Gore 5 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 is described in Japanese Patent Laid-Open No. 2 0 4-1 6 6 5 4

M281669 For golf club heads, the front part, the golf club part connected to the front part, and the widthwise center part of the bottom part are made of metal. Otherwise, they are classified as CFRP. (Patent Document 1) Japanese Patent Laid-Open No. 2 0 4-1 6 6 5 4 [New contents] (New type of problem to be solved) Japanese Patent Laid-Open No. 2 0 4-1 6 6 5 4 There is no record in the bulletin of the use of amorphous metals. The purpose of this creation is to provide a golf club head whose top is made of reinforced resin, which can improve the rebound characteristics of the metal front part, which can increase the flight distance of the ball. (Means of Solving the Problem) The golf club head of the present invention (the first patent application scope) has a hollow golf club with a face, a bottom, a side, a top, and a hosel, which is characterized in that the main part of the top is composed of The fiber-reinforced resin is made of metal, and the front edge portion of the top portion connected to the front portion is made of metal. The fiber-reinforced resin portion of the top portion is joined to the rear end surface and the inner surface of the gold front edge portion of the top portion. The golf club head according to the second patent application scope is the golf club head according to the first patent application, in which all the metal parts are made of shaped metal. The golf club head according to the third patent application scope is the golf club head according to the first patent application, wherein a peripheral edge portion of the front portion is made of crystalline metal, and a front panel made of an amorphous metal is opposed to the front plate. 312XP / Invention Patent Specification (Supplement) / 94-〇5 / 942〇〇 ** 76 The front part of the head, gold fiber, from the positive head, to the manufacturing system, the amorphous range, the periphery of the junction 6 M281669 margin Department fixed. The golf club head according to claim 4 is the golf club head according to any of claims 1 to 3, wherein the front edge portion of the side portion and the front edge portion of the bottom portion are the same as the above. The front part is connected and made of metal, and the center of the bottom tip and heel direction is connected to and made of metal. The metal part of the bottom extends to the golf club head. rear. The golf club head with the scope of patent application No. 5 is the golf club head with the scope of patent application No. 1. Among them, all parts except the top main part are made of metal, and all parts except the front part are A crystalline metal whose peripheral edge portion is made of a crystalline metal, and a front panel made of an amorphous metal is fixed to the peripheral edge portion.

The golf club head according to item 6 of the patent application is the golf club head according to item 3 or 5 of the patent application, wherein the positive edge made of amorphous metal is riveted by riveting the peripheral edge portion side of the front portion. The panel is fixed to the peripheral edge portion of the front portion made of crystalline metal. (Creative effect) The main part of the golf club head of this creation is made of fiber-reinforced resin. When hitting the ball, the top is easy to flex and has good rebound characteristics. It is also possible to reduce the weight of the golf club head. In this creation, although at least the central portion of the front portion is an amorphous metal, since the amorphous metal has higher strength and lower elasticity than crystalline metal, it is possible to reduce the wall thickness of the front portion and increase the front surface when hitting The deflection of the part improves the rebound property, which can increase the flight distance of the ball. 7 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669 In addition, amorphous metals are different from crystalline metals, making it difficult to forge or stamp or process them. Therefore, if all metal parts are integrally cast from amorphous metal, it can be easily manufactured. In addition, the peripheral edge portion of the front portion may be made of crystalline metal, and a portion other than the peripheral edge portion of the front portion may be used as a front plate made of an amorphous metal, and the front portion may be formed by riveting or the like. The panel is fixed to the peripheral edge portion. [Embodiment]

Hereinafter, embodiments will be described with reference to the drawings. 1 is a perspective view of a golf club head according to the embodiment, FIG. 2 is a perspective view of the metal body of the golf club head viewed from the front, FIG. 3 is a perspective view of the metal body viewed from the rear, and FIG. 4 is a view of the metal body from the heel side. In a side view, FIG. 5 is a plan view of a metal body. In FIG. 6, (a) is a longitudinal sectional view of the golf club head in the front-rear direction, and (b) is a partially enlarged view of (a). The golf club head 1 is a hollow wood-type golf club head, and has a front portion 2, a bottom portion 3, a side portion 4, a top portion 5, and a hosel portion 6. This golf club head 1 is composed of a metal body 10 made of an amorphous metal as a whole, and a fiber-reinforced resin body (hereinafter referred to as F R P body) 20. As the alloy composition constituting the amorphous metal, a samarium-based amorphous alloy is preferred, and a samarium-based amorphous alloy having a composition of the general formula ZrMX is particularly preferred. Where M is one or more metal elements selected from V, Cr, Mn, Fe, Co, Ni, Cu, Ti, Mo, W, Ca, Li, Mg, Si, Al, Pd, Be, and X is one or more metal elements selected from Y, La, Ce, Sm, Md, Hf, Nb, and Ta. In addition, the amorphous metal may be completely amorphous or a part of which may be crystalline quasi 8 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669 completely amorphous. The metal body 10 has: a front portion 2, a metal bottom portion 1, 3, a metal side portion (tip) 1, 4, a metal top portion 5, a metal side portion (heel) 1, 6, a metal back portion 1, and a metal back portion 1 7 Upper ring part 18, sheath part 6.

The front portion 2 is a hitting surface, and a scoreline (not shown) is provided thereon. The bottom portion 3 constitutes the bottom portion of the golf club head, and the side portion 4 constitutes the side portions on the tip side, the heel side, and the rear side. The top 5 constitutes the upper face of the golf club head. A rod is inserted into the sheath portion 6, and the rod is fixed with an adhesive. The metal body 10 is composed of the front part 2, the front edge part of the top part 5, the front edge part of the side part 4, the front edge part of the bottom part 3, the center part of the left-right direction (heel and tip direction), and the golf club head. The back. The metal top portion 15 forming the front edge portion of the top portion 5 is connected to the metal side portion (tip) 14 and the metal side portion (heel) 16. The metal side (tip) 1 4 and the metal side (heel) 16 are connected to the metal bottom 13 respectively. The metal side portions 14 and 16 and the metal bottom portion 13 are connected to the front portion 2. The front portion of the metal bottom portion 13 has a full width spanning from the tip side to the heel side of the golf club head. The width of the metal bottom portion 13 is gradually narrowed from the front to the rear. The rear portion of the metal bottom portion 13 is arranged at the center in the heel and tip direction of the golf club head. A metal back 17 is connected to a rear end of the metal bottom 13. The metal back 17 stands obliquely rearward from the metal bottom 13. An annular portion 18 is integrally provided on the inner surface of the metal back portion 17. An opening is provided through the annular portion 18 and the metal back 17, and an internal thread is provided on the inner peripheral surface of the opening (not shown). 9 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669 The amorphous metal body 10 can be manufactured by pouring a molten alloy into a mold and cooling it at a cooling rate higher than a predetermined speed. The cooling rate is selected based on the amorphous metal composition. The F R P body 20 constitutes another part of the outer surface of the golf club head 1. That is, the F R P body 20 constitutes the rear half of the top 5, the rear half of the side 4 (but not including the metal back), and the portion of the bottom 3 other than the metal bottom 13.

As shown in the enlarged view of Fig. 6, the FRP body 20 is in close contact with the end faces of the metal top 15, metal side 14 (tip, both), and the metal bottom 13, and overlaps with the inner surface of these end edges. Particularly for the metal top 15, as shown in FIG. 6 (b), the F R P body 20 reaches the inside of the front part 2. That is, the FRP body 20 is in close contact with the entire surface of the inner surface of the metal top 15. In order to form the FRP body 20 and integrate the FRP body 20 and the metal body 10, the metal body 10 is placed in a metal mold having an outer shape of a golf club head as required, and the inner surface of the metal body 10 is Primer treated. Next, a prepreg resin sheet laminate (unhardened resin fiber composite material sheet) is provided along the inner surface of the metal mold and the inner surface of the end edge of the metal body 10. Alternatively, the laminate may be pre-formed so that the laminate is previously formed into a shape similar to the inner surface of the gold mold. Thereafter, the resin is hardened by heating through the opening of the annular portion 18 in a state where air pressure is applied to the inside. At this time, a resin bag such as nylon may be disposed in the golf club head in advance, and gas may be supplied into the bag to expand the bag, and the prepreg resin sheet may be pressed to closely adhere to the inner surface of the mold. As a result, as shown in FIG. 6, the F R P body 20 is formed, and the peripheral edge portion 21 of the F R P body 20 is closely adhered to the end surface and the edge portion of the metal body 10. After forming 10 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669, the mold is released, and a vibration absorbing layer or a hitting sound adjusting layer is formed on the inner surface of the golf club head as required. For example, by forming a layer of an adhesive made of polyisobutylene or the like, the hollowing of the golf club head is prevented. A bolt-shaped body is screwed into the opening of the metal back 17 (illustration omitted in Figs. 1 to 6). The internal thread for screwing may be provided in the metal body 10 in advance, or may be provided after demolding. Then, the outer surface of the golf club head is ground or sprayed as needed to make a golf club head product.

As the plug-shaped body, in order to deepen the center of gravity of the golf club head, it is preferable to use a material having a high specific gravity such as tungsten. Further, as shown in Figs. 7 (a) and (b), the plug-shaped body 30 may be fixed to the opening 40 of the annular portion 18 by miswelding, adhesion, interference fit, or the like. The plug-shaped body 30 has a cylindrical portion 31 and a flange portion 32 provided at the rear end of the cylindrical portion 31. The opening 40 of the annular portion 30 has a stepped portion 41 at an entrance portion thereof, and the flange portion 32 is fitted to the stepped portion 41. As the plug body 30, a tungsten, nickel, iron (W-Ni-Fe) alloy having a specific gravity of about 10 to 12 can be used. The alloy composition is preferably as follows. W: 28 to 32% by weight

Fe: 45 to 49% by weight Ni. 15 to 17% by weight. Cu: 1 to 2% by weight. This alloy composition is a composition that can be cast. The alloy composition has a large iron content and has excellent weldability to stainless steel. Therefore, even T I G welding, which is a general welding method, can be easily welded. 11 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669 Since the golf club head structured like this, the metal body 10 including the front portion 2 is made of amorphous metal, so the front portion 2 can be made. The wall is thin, and the deflection of the front portion 2 at the time of hitting the ball is increased, thereby improving the resilience and increasing the flying distance. Among them, the wall thickness of the front portion 2 (excluding the peripheral edge portion) is preferably 1 to 4 mm, and more preferably about 1.5 to 3 mm. The peripheral edge portion of the front portion 2 may be thicker than this. Since the rear half of the golf club head is mainly an F R P body, it is lightweight and can be enlarged.

In addition, since the FRP body 20 is also overlapped and tightly bonded to the inner surface of the end edge of the metal body 10, the metal body 10 and the FRP body 20 are firmly bonded and excellent in durability. Among them, the average width of the front and rear directions (front surface, back direction) of the metal top portion 15 and the metal side portion 14 is preferably 2 to 20 mm, more preferably 5 to 18 mm. In the golf club head of this embodiment, the metal bottom portion 13, the metal side portion 14, and the metal top portion 15 are present on the entire periphery of the front portion 2, and the peripheral edge portion of the surface portion 2 has high rigidity. Therefore, even if the front portion 2 is thin, the metal body 10 as a whole can have the necessary strength. Since the front edge portion of the bottom portion 3 of the golf club head is made of a metal bottom portion 13, even if the front edge portion of the bottom portion 3 hits the ground during a swing (a so-called service error), the bottom portion will not be damaged. 1 3 of the front edge. In this golf club head, since the metal sole 13 is extended in the center of the sole 3 in the front-rear direction, the center of gravity of the golf club head can be lowered, and it is easy to complete a shot. In addition, since the metal bottom portion 13 is extended backward, the center of gravity of the golf club head is deepened, and the sweet spot is increased. In addition, since the ring portion 18 is disposed at the rearmost phase with the metal bottom portion 13 12312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876

M281669 is connected to the metal back 17 and the ring-shaped part 18 is fixed with a plug-shaped body made of the material, so the center of gravity is deeper. In this embodiment, as shown in Fig. 3, a part of the hosel portion 6 is placed inside the golf club head. This can reduce the center of gravity. In addition, by arranging a part of the hosel portion 6 inside the Gore's head in this manner, the torque applied to the shaft at the time of hitting the ball is reduced, and the lateral deviation is reduced. In addition, by reducing the length that the hosel portion 6 protrudes from the outer surface of the golf ball, the appearance of the golf club head is beautiful. The arrangement length of the hosel portion 6 inside the golf club head is preferably 10 to, more preferably 20 to 50 mm, and most preferably 35 to 45 mm. In the above-mentioned embodiment, the entire metal body 10 is made of an amorphous metal. However, it is also possible to use a non-metal part of the surface portion other than the peripheral edge portion, and a portion other than the front surface portion and the peripheral edge portion of the front portion made of crystal. Metal body. The metal body 50 in Figs. 8 and 9 and the gold 70 in Figs. 10 and 11 are respectively related structures. The metal body 50 in FIGS. 8 and 9 is the same as the metal body 10 in FIGS. 1 to 7 and has: a front portion 52, a metal bottom portion 53, a metal side portion (tip) 54, a top portion 5, a metal side portion (heel), and a metal. The back portion 5 7, the ring portion 58, and the portion 56 are connected to the metal side portion (end) 54 and the metal side portion (heel). The metal side (tip) 5 4 and the gold (heel) are connected to the metal bottom 5 3 respectively. The metal side portion 54 and the gold portion 53 are connected to the front portion 52. The front part of the metal bottom 5 3 is from the tip side of the golf club head 3 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 Significantly distributed golf club head 50mm [formed, crystalline metal body Alas, metal hosel: full-angled on the side of the pointed side and the bottom W and 13 on the M281669 side. The metal bottom portion 53 is gradually narrowed from the front portion toward the rear. The rear portion of the metal bottom 5 3 is arranged at the center in the heel and tip direction of the golf club head. A metal back 5 7 is connected to a rear end of the metal bottom 5 3. The metal back 57 stands obliquely rearward from the metal bottom 53. An annular portion 5 8 is integrally provided on the inner surface of the metal bottom portion 5 3. An opening is provided through the annular portion 58, and an internal thread (not shown) is provided on the inner peripheral surface of the opening. A plug-shaped body 30 made of a material having a large specific gravity is screwed into the annular portion 58 (not shown in Figs. 8 and 9).

The above part of the metal body 50 is made of a crystalline metal. Examples of the crystalline metal include lightweight titanium, titanium alloys, and alloys. In the metal body 50, an opening 60 is provided with a peripheral edge portion of the front portion 52, and a front plate 5 2f made of an amorphous metal is fitted and fixed in the opening 60. In this embodiment, a stepped portion 61 is provided on an inner peripheral edge portion of the opening 60, and the front surface of the main body of the metal body 50 before the front panel 5 2f is mounted is arranged along the edge portion of the opening 60. Convex strip 6 2. A concave step portion 63 is provided on a peripheral edge portion on the front side of the front panel 5 2 f. After the front panel 5 2 f is in contact with the stepped portion 61 and fitted into the opening 60, the convex strip 6 2 is riveted and deformed to press the concave stepped portion 6 3 to fix the front panel 5 2 f. On the peripheral edge portion of the front portion 52. Since the front plate 5 2 is substantially flat, it can be easily manufactured even with an amorphous metal. Since the metal system other than the front plate 5 2 is made of crystalline metal, it can be easily manufactured by various methods such as tungsten fabrication, forging, stamping, cutting, and welding. The structure of the metal body 50 of FIGS. 8 and 9 is the metal body 1 0 14 312 of the FIGS. 1 to 7 / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669, and an opening 6 0 is provided in the front portion. A front face 5 2 f is mounted on the opening 60. The golf club head using the metal body 50 is replaced with the metal body 50 by the metal body 50. The club heads are the same. FIG. 10 is a perspective view of a metal body 70, in which the side and back of the golf club head are also made of metal, and a front face 7 2 f made of an amorphous metal is fixed to the front portion, and FIG. 11 is the use of the metal A longitudinal sectional view of the golf club head of the body 70 in the front-rear direction.

The metal body 70 has: a front portion 7 2, a bottom portion 7 3, side portions (front side and heel side) 7 4, a metal top portion 7, a back portion 7, a hosel portion 7 6. The metal tops 75 and 5 constitute only the peripheral edge portion of the top of the golf club head. A portion other than the peripheral edge portion of the top portion is an opening 7 9, and an FRP body 90 is attached to the opening 7 9. The front surface portion 72 of the metal body 70 is provided with an opening 80 leaving a peripheral edge portion, and a front plate 7 2 made of an amorphous metal is fixed in the opening 80. The metal body 7 0 is other than the front plate 7 2 f and is made of a crystalline metal. The crystalline metal is preferably titanium, a titanium alloy, or an aluminum alloy. The opening 80 has the same structure as the opening 60 of the metal body 50 described above. The front panel 7 2 f is in contact with the stepped portion 81, and then the edge portion of the opening 60 is riveted to fix the front panel 7 2 f. Block the opening 6 0. The FRP body 90 is fixed to the metal body 70 similarly to the FRP body 20 of FIGS. 1 to 7. In this embodiment, the FRP body 20 is fixed to overlap the upper surface of the metal top 75. The metal body 70 may be provided with a plug-shaped body made of a specific gravity material, and its illustration is omitted. 15 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669 Since golf club heads having metal bodies 50 and 70 shown in FIGS. 8 and 9 and FIGS. 10 and 11 are also provided on the front side There are amorphous metal front panels 5 2 f, 7 2 ί, so the front part can be made thinner wall, which increases the deflection when hitting the ball and improves its resilience, which can increase the flight distance.

In this creation, you can also adjust the arrangement direction of the reinforcing fibers in the top of the FR body so that the rigidity in the front-to-back direction (front-to-back direction) is less than the tip-to-heel direction (left-to-right direction). If so, you can increase the amount of deflection at the top when hitting the ball and increase the angle of the ball. As a result, the carry distance of the hit ball is increased. The prepreg resin sheet used to form the F R P body may be any of a cross-shaped fiber prepreg resin sheet, a unidirectional fiber prepreg resin sheet, and the like. When an S M C prepreg resin sheet is used as the prepreg resin sheet, a thin-walled FRP body can be easily formed. The prepreg resin sheet is preferably used by laminating about 3 to 8 sheets. The fibers in the prepreg layer are preferably carbon fibers of about 20 × 103 to 30 × 103 kg / mm2, but are not limited thereto. As described above, it is preferable to adjust the arrangement direction of the fibers so that the elastic modulus in the front-back direction of the top portion is lower than that in the tip-to-heel direction. For example, a cruciform fiber prepreg resin sheet and a unidirectional fiber prepreg resin sheet are alternately laminated, and the fiber arrangement direction of the unidirectional fiber prepreg resin sheet is the tip and heel directions. As the resin of the F R P body, a thermosetting resin such as an epoxy resin can be used. Among them, a small amount of a thermoplastic resin may be added to the thermosetting resin, thereby improving vibration absorption. The thickness of the F R P body is preferably about 1 to 3 Hi m. In particular, the top is preferably 16 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 M281669, about 1 to 2 mm, more preferably 1 to 1.5 mm, such as about 1.3 mm. This creation is suitable for large club heads above 3 0 0 c m3, especially for more than 3 50 c m3, such as 3 50 to 4 0 0 c m3. There is no upper limit on the size of the head, and it is technically possible to manufacture an oversized head of about 600 cm3. The weight of the golf club head is preferably 160 to 200 g, and most preferably 180 to 190 g. [Brief Description of the Drawings] FIG. 1 is a perspective view of a golf club head according to the embodiment. FIG. 2 is a perspective view of the golf club head metal body of FIG. 1 as viewed from the front.

FIG. 3 is a perspective view of the golf club head metal body of FIG. 1 as viewed from the rear. FIG. 4 is a side view of the golf club head metal body of FIG. 1 as viewed from the heel side. FIG. 5 is a plan view of the metal body of the golf club head of FIG. 1. In FIG. 6, (a) is a longitudinal sectional view of the golf club head of FIG. 1 in the front-rear direction, and (b) is a partially enlarged view of (a). FIG. 7 is a longitudinal sectional view of a rear portion of a golf club head according to another embodiment of the present invention, in which (a) shows a state before the plug-shaped body is installed, and (b) shows a plug-shaped body

8 is an exploded perspective view of a metal body used in another embodiment. FIG. 9 is a cross-sectional view showing a front panel fixing structure of the metal body of FIG. 8. FIG. 10 is an exploded perspective view of a metal body used in still another embodiment. 11 is a cross-sectional view of a golf club head having the metal body of FIG. 10. [Description of main component symbols] 1 Golf club head 2 Front part 3 Bottom 17 312XP / Invention patent specification (Supplement) / 94-05 / 94200876 M281669

4 Side part 5 Top part 6 Sheath part 10 Metal body 13 Metal bottom 14 Metal side part (tip) 15 Metal top part 16 Metal side part (heel) 17 Metal back part 18 Ring part 20 Fiber-reinforced resin body (FRP body) 30 Tie Shaped body 31 Cylindrical part 32 Flange part 40 Open V 4 1 Step part 50 Metal body 52 Front part 52f Front panel 53 Metal bottom 54 Metal side part (tip) 55 Metal top 56 Sleeve part 57 Metal back 312XP / Invention patent specification (Supplement) / 94-05 / 94200876 18 M281669 58 60 61 6 2 63 7 0 7 2

72 f 73 7 4 75 77 76 79 80 • 8 1 90 Ring-shaped opening step portion convex concave step portion metal body front portion front panel bottom side portion (front side and heel side) metal top back sleeve portion opening opening step FRP Body 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 19

Claims (1)

M281669 Nine, patent application scope: 1. A golf club head, which is a hollow golf club head with a front portion, a bottom portion, a side portion, a portion and a hosel portion, characterized in that the main portion of the top portion is made of fiber reinforced resin Therefore, at least the front portion and the front edge portion of the top portion connected to the front portion are made of metal, and at least the middle portion of the front portion is made of amorphous metal. 2. The golf club head according to item 1 of the patent application scope, wherein the metal part is made of an amorphous metal. 3. The golf club head according to item 1 of the patent application scope, wherein a peripheral edge portion of the face portion is made of crystalline metal and is made of an amorphous metal, and the front panel is fixed relative to the peripheral edge portion. 4. The golf club head according to any one of claims 1 to 3, wherein the front edge portion of the side portion and the front edge portion of the bottom portion are connected to the front portion and are made of metal, and the bottom portion The pointed and heeled central portion is connected to the metal front edge portion of the bottom portion and is made of metal. The metal portion of the bottom center portion extends to the rear of the golf club head. 5. The golf club head according to item 1 of the scope of patent application, wherein all parts except the main part of the top part are made of metal, parts other than the main part are crystalline metal, and the peripheral edge of the front part The portion is made of crystalline metal, and the front panel made of an amorphous metal is fixed to the peripheral portion. 6. The golf club head according to item 3 or 5 of the scope of patent application, wherein the front edge peripheral edge portion side is riveted so that the amorphous metal is made of 312XP / Invention Patent Specification (Supplement) / 94-05 / 94200876 The top part of the top has a positive edge 20 M281669. The front panel is fixed to the peripheral edge of the front part made of crystalline metal. 312XP / Invention Patent Specification (Supplement) / 94_05 / 94200876