JP2004216131A - Golf club head and golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club head in which repulsive characteristics are improved by greatly displacing a face part to the side of a back part (backwards), and a golf club equipped with the head. <P>SOLUTION: The golf club is equipped with a golf club head 1, a shaft and a grip. The golf club head 1 has an outer shell structure and is provided with a face part 2, a crown part 3, a sole part 4 and bonding parts 5. The bonding parts 5 are provided between the face part 2 and the crown and sole parts 3 and 4, bond the face part 2 with the crown part 3 and the sole part 4, and are composed of a material of an elastic modulus lower than that of the face part 2. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to golf club heads and golf clubs, and in particular, the inside of the head is hollow or the inside of the head is filled with foam, and the outer shell is a metal material such as titanium, titanium alloy, stainless steel, or a resin such as a fiber reinforced resin. The present invention relates to a head having an outer shell structure made of an elastomer and a golf club having the head.

  It is known that when a golf club head collides with a golf ball, the higher the coefficient of restitution of the head, the higher the initial velocity of the ball and the greater the flight distance. Therefore, hitting the ball by conventionally providing a deformation assisting part at the face end or crown part, providing a bent part at the face edge part, or lowering the surface hardness of the material around the face from the center part. It has been proposed to improve the resilience characteristics by utilizing the deformation of the face part sometimes.

  For example, Japanese Patent Application Laid-Open No. 10-263118 describes a golf club head provided with a deformation assisting portion so that the deflection of the face portion at the time of hitting or the relative displacement of the face portion with respect to the golf club head increases.

  Japanese Patent Application Laid-Open No. 2002-52099 discloses that a bent portion reaching the inside of the head from the face edge is provided at least at the top of the head along the periphery of the face, and the thickness of the bent portion is larger than the thickness of the top. A golf club head characterized in that is described.

Japanese Patent Application Laid-Open No. 2002-233595 describes a metal golf club head characterized in that the hardness of the peripheral portion of the face surface is lower than the hardness of the central portion.
Japanese Patent Laid-Open No. 10-263118 JP 2002-52099 A JP 2002-233595 A

  As described above, in the golf club head described in JP-A-10-263118, it is described that a deformation assisting portion is provided to increase the deflection of the face portion or the relative displacement of the face portion with respect to the golf club head at the time of hitting. However, the face portion itself is easily bent or only part of the face portion is displaced, and the idea of displacing the entire face portion toward the back portion (rear) is not described. Therefore, the face part cannot be greatly displaced toward the back part side, and there is a limit to improving the resilience characteristics.

  Further, since a through hole or a thin portion is formed in the head in order to provide the deformation assisting portion, there is a problem that the strength of the head is locally lowered and easily damaged. Furthermore, a new process such as a process of providing a through hole and a process of fitting a low elastic body is required, which not only increases the cost, but also may cause the low elastic body to come off.

  In the golf club head described in JP-A-2002-52099, a bent portion is provided along the periphery of the face, and the bent portion is bent to improve the resilience characteristics of the face portion. Since the thickness of the bent portion is increased, the rigidity of the bent portion is increased, and the amount of displacement of the face portion toward the back portion is extremely reduced. Therefore, in practice, it is not possible to expect much improvement in the rebound characteristics of the face portion. In addition, it is difficult to form the bent portion, the number of processes increases, and the manufacturing cost increases.

  Further, in the golf club head described in Japanese Patent Laid-Open No. 2002-233595, the hardness of the center portion of the face surface is only lowered to make the face portion itself easily bent, and the entire face portion is displaced toward the back portion side. The idea to make it not described.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club head capable of improving the resilience characteristics by greatly displacing the face portion toward the back portion (rear), and a golf club including the head.

  The golf club head according to the present invention is a golf club head having an outer shell structure. In one aspect, the golf club head includes a face portion, a crown portion, a sole portion, and a joint portion. The joint portion is provided between the face portion, the crown portion, and the sole portion, and is composed of a material having a lower elastic modulus than the face portion, joining the face portion, the crown portion, and the sole portion.

  As described above, the joining portion that joins the face portion, the crown portion and the sole portion is made of a material having a lower elastic modulus than the face portion, so that the joining portion is given priority when the golf ball is hit with the face portion. In addition to the deflection of the face part itself, the face part can be greatly displaced toward the back part side (rear).

  You may comprise the said crown part and sole part, and a junction part with the same material. Further, the face portion may be manufactured using a metal laminate material including a dissimilar metal laminate portion in which dissimilar metals having a thickness of about 0.1 μm to 100 μm are laminated and integrated.

  The face portion preferably has an extending portion extending to at least one side of the crown portion and the sole portion, and the metal laminated material is preferably made of the same kind formed by laminating and consolidating the same kind of metal on the peripheral edge portion. It has a metal laminate. In this case, the extension part is constituted by the same kind of metal laminated part, and the same kind of metal laminated part and the joining part are joined.

  In another aspect, the golf club head according to the present invention includes a face part including a face part and a back part joined to the face part via the joint part, and the joint part has an elastic modulus higher than that of the face part. Consists of a low material.

  You may comprise said back parts and a junction part with the same material. Further, the face part may be manufactured using a metal laminate material including a dissimilar metal laminate portion obtained by laminating and integrating dissimilar metals having a thickness of 0.1 μm or more and 100 μm or less.

  The face part preferably has an extending part extending to the back part side, and the metal laminated material has a homogeneous metal laminated part formed by laminating and integrating the same kind of metal at the peripheral part. In this case, the extension part is formed of the same kind of metal laminated part, and the same kind of metal laminated part and the back part are joined.

  The joining portion is preferably made of resin. The melting point of the resin is preferably about 300 ° C. or higher and 500 ° C. or lower. By setting the melting point of the resin within this range, the resin can be melted in a state where the metal material mainly used in the current golf club head is softened, and sufficient bond strength between the metal material and the resin material is obtained. Can also be secured.

  It is preferable to join the joint portion and the face portion by diffusing the material of the joint portion and the material of the face portion. Thereby, the joint portion and the face portion can be firmly joined. Alternatively, the joint portion and the face part may be joined by mutually diffusing the joint portion material and the face part material. Also in this case, the joint portion and the face part can be firmly joined.

  A golf club according to the present invention includes the above-described head. Accordingly, it is possible to obtain a golf club having a head with excellent resilience characteristics that can greatly displace the face portion toward the back portion (rear) in addition to the deflection of the face portion itself.

  According to the present invention, in addition to the deflection of the face portion itself, the face portion can be greatly displaced toward the back portion (back parts) side (rear), so that the amount of deformation of the golf ball can be reduced, and as a result In addition, the rebound characteristics of the golf club head can be improved.

  Hereinafter, golf club heads and golf clubs according to embodiments of the present invention will be described. The present invention is useful for wood type golf club heads and wood type golf clubs, but is also applicable to iron type golf club heads and iron type golf clubs.

  The golf club in the present embodiment includes a golf club head, a shaft, and a grip which will be described later. The golf club head is typically a golf club head having an outer shell structure. In the case of a wood type golf club head, the golf club head includes a face portion, a crown portion, and a sole portion. Known shafts and grips are used.

  The golf club head according to the present embodiment has an important feature of including a joint portion that joins the face portion, the crown portion, and the sole portion between the face portion, the crown portion, and the sole portion.

  The face portion can be manufactured using a high-strength metal material such as a titanium alloy or a metal laminate material including a dissimilar metal laminate portion obtained by laminating and integrating dissimilar metals having a thickness of about 0.1 μm to 100 μm. The face portion preferably has an extending portion (flange portion) extending to at least one side of the crown portion and the sole portion, and has a cup shape.

  It is preferable that said metal laminated material has the same kind metal laminated part formed by laminating | stacking and integrating the same kind metal on a peripheral part. When such a metal laminated material is used as the face portion, the extending portion may be formed of the same kind of metal laminated part, and the same kind of metal laminated part and the joining part may be joined. Thereby, the face portion can be easily and firmly joined to the joint portion.

  The thickness of each layer constituting the metal laminate is preferably about 10 μm to 50 μm. The number of metal layers to be stacked is, for example, about 10 or more and 1000 or less. The number of metal layers is preferably about 20 or more and 200 or less.

  In this way, the dissimilar metal laminated part, in which thin dissimilar metal layers are laminated and joined and integrated on almost the entire surface of each layer, is different from a general clad material in which metal materials are simply joined, as if it is one alloy. It has the following properties. For example, the dissimilar metal layers are firmly bonded to each other by diffusion bonding, and the compound of dissimilar metals is arranged in an inclined manner.

  In order to manufacture the metal laminate as described above, for example, a large number of metal layers having different thicknesses of about 1 mm or less are alternately laminated, and the laminated metal layers are integrated and rolled. What is necessary is just to heat-process.

  Each dissimilar metal layer does not necessarily have to be alternately stacked one by one, and a set of dissimilar metal layers having an arbitrary number of layers may be alternately stacked. In addition, in order to manufacture a metal laminate including the same kind of metal laminate, prepare metal layers of different materials and different sizes, laminate a large number of them, and create a part where only the metal layers of the same kind of material are laminated. What is necessary is just to ensure positively so that the thickness difference with a center part may be made small. Then, the stacked metal layers may be integrated and rolled, and heat treatment may be performed as necessary.

  By the way, as the characteristics required for the face portion, there are high resilience characteristics and excellent durability. In order to improve the resilience characteristics, it is conceivable to reduce the rigidity of the face portion. Thereby, energy loss due to deformation of the ball at the time of hitting can be reduced. On the other hand, in order to improve the durability of the face portion, it is necessary to ensure a certain level of strength.

  Therefore, by using a metal laminate that combines a low-elasticity material such as an aluminum alloy or magnesium alloy with a high-strength material such as a titanium alloy or stainless steel, not only high resilience but also excellent durability is achieved. A face portion having the same is obtained.

  For example, when a metal laminate is made of an aluminum alloy and a β-type titanium alloy, the tensile strength of the metal laminate is made to be about the same as that of a β-type titanium alloy by appropriately adjusting the thickness and number of layers of each alloy. A metal material having a lower elasticity than that of the β-type titanium alloy can be obtained. More specifically, a face portion having a longitudinal elastic modulus of about 40 GPa or more and 80 GPa or less can be manufactured. Table 1 below shows examples of combinations of materials that can produce the face portion.

  The number of layers of each material shown in Table 1 may be the same, but may vary depending on the required characteristics. Moreover, although the case where two types of materials were combined was illustrated in Table 1, it is also possible to combine three or more types of materials. However, considering simplification of the process and cost reduction, it is preferable to combine two or three kinds of materials.

  The crown portion and the sole portion of the golf club head can be manufactured using, for example, a metal material such as titanium, a titanium alloy, and stainless steel, or a resin such as a fiber reinforced resin, or an elastomer.

  The joint portion is made of a material having a lower elastic modulus than the face portion. By configuring the joint portion with a material having a lower elastic modulus than the face portion in this way, when the golf ball is hit with the face portion, the joint portion can be preferentially elastically deformed and contracted. In addition to this bending, the face part can be greatly displaced toward the back part side (backward). Thereby, the deformation amount of the golf ball at the time of hitting can be reduced, and energy loss can be reduced. As a result, the rebound characteristics of the golf club head can be improved.

  The joining portion is typically formed of a material different from that of the face portion, the crown portion, and the sole portion, and the peripheral portion (end portion) of the face portion that comes into contact with the joining portion, the crown that comes into contact with the joining portion It has a thickness equal to or greater than the face side end portion of the head portion or sole portion, and can constitute a part of the outer shell of the head portion alone. The length of the joint portion in the direction from the face portion toward the rear is, for example, about several mm to several tens mm or more.

  The joint portion can be made of resin, for example. Since the rigidity of the resin is much lower than that of the face portion made of metal, the joint portion can be easily elastically deformed when the golf ball is hit by constituting the joint portion with resin.

  The melting point of the resin is preferably about 300 ° C. or higher and 500 ° C. or lower. The reason why the preferable range of the melting point of the resin is defined in this way is as follows.

  The melting point (for example, aluminum: 660 ° C., magnesium: 651 ° C.) of the metal material mainly used in the current golf club head is about 600 ° C. to 700 ° C., and the melting point is such that the metal material can be softened. In consideration, the melting point of the resin is preferably around 400 ° C. On the other hand, if the melting point of the resin is too low, a sufficient bond strength can be obtained because the difference in shrinkage from the metal material becomes large when the resin is cured after heating to near the melting point of the metal material. There is a risk of disappearing. Therefore, by setting the melting point of the resin within the above range, the metal material can be softened when the resin is melted, and sufficient bond strength between the metal material and the resin can be ensured.

  Examples of resins that can be used in this embodiment include polyimide, polyether ketone, polyallyl ether ketone, polyether imide, polysulfone, polyether sulfone, and a melting point of about 300 ° C. , Polyamideimide, polyester, polycarbonate, polyphenylene ether, polyphenylene sulfide and the like.

  Among the above resins, polyamide has good mechanical properties and can be easily reinforced with glass fibers. Polyimide can be formed into a powder form by a technique such as sintering. Furthermore, polyamideimide has super heat resistance among engineering plastics and can be injection-molded, and exhibits a high level of mechanical properties.

  In addition to the above, as a material of the joint portion, cyanate ester resin, bismaleidotridian resin, carbodiimide resin, polybenzimidazole resin, and further, fibers obtained by adding glass fiber, carbon fiber, aramid fiber, etc. to the above resins Reinforced plastics can also be used.

  When the bonding portion is made of the above resin, a so-called diffusion bonding method can be used for bonding the bonding portion and the face portion. As described above, the melting point of the metal material used for the golf club head such as aluminum is relatively low melting point of about 600 ° C. to 700 ° C. For joining the low melting point metal material and the above resin. By using the diffusion bonding method, these can be bonded very firmly. Moreover, the process of joining the face part, the crown part, and the sole part has conventionally existed, and instead of the process, the face part, the crown part, and the sole part may be joined via the joint part. Therefore, the number of processes is not substantially increased, and the cost is not increased.

  The diffusion bonding method described above strongly bonds different materials by molecular movement on the bonding surface. By bonding the bonding portion and the face portion using such a diffusion bonding method, the material of the bonding portion and the material of the face portion can be diffused to each other at the atomic level. It can be firmly joined.

  It is also possible to join the face part, the crown part, and the sole part via the joint part by forming the resin part first and then pressing it while applying heat.

  As a member for forming the joint portion, for example, a ring-shaped member or a plate-shaped member can be employed. In this case, a ring-shaped member or a plate-shaped member is inserted between the face portion, the crown portion, and the sole portion, and the face portion, the crown portion, and the sole portion are joined via the ring-shaped member or the plate-shaped member. do it.

  For example, a face part and a head main body part including a crown part and a sole part are manufactured, and a common ring-like member or plate-like member is joined to both the face part and the head main body part. A method of joining the face part and the head body part by joining a ring-like member or a plate-like member to both the head part and the head body part and joining the ring-like member and the plate-like member together is conceivable.

  It is also conceivable that the crown portion, the sole portion, and the joint portion are made of the same material. For example, it is conceivable that the head main body portion including the crown portion and the sole portion and the joint portion are integrated, and the end portion of the head main body portion functions as the joint portion. More specifically, for example, the head main body portion other than the face portion is made of resin, and an opening end to which the face portion is joined is provided in the head main body portion, and the opening end of the head main body portion and the vicinity thereof are defined as the face portion. It can be considered to function as a joint by joining.

  Further, when the diffusion bonding method is adopted, a concave portion is provided in the joint portion, and the joint portion and the end portion of the face portion are joined in a state where the end portion of the face portion including the extension portion is inserted into the concave portion. May be. In this case, since the contact area between the joint portion and the face portion can be increased, the joint portion and the face portion can be joined more firmly.

  A golf club head according to another embodiment of the present invention includes a face part including a face part, and a back part joined to the face part via the joint part. This type of golf club head can be used not only as a head of a wood type golf club but also as a head of an iron type golf club.

  The face part is a part including at least a part of the face part. When the face part is composed of a plate-shaped member that forms the center part (for example, a hitting ball part) of the face part, the face part is composed of a plate-shaped member that forms the entire face part. In the case of having one or a plurality of extending parts extending from the plate-like member forming the central part of the face part to the back part side, the plate-like member forming the entire face part is extended to the back part side. The case of having one or a plurality of extending portions is conceivable.

  The face part is preferably manufactured using the above-described metal laminate material including a dissimilar metal laminate portion in which dissimilar metals having a thickness of 0.1 μm or more and 100 μm or less are laminated and integrated. However, when the face part has an extended part that extends to the back part side, the face part is made using a metal laminate material having the same kind of metal laminated part formed by laminating and integrating the same kind of metal at the peripheral part. It is preferable to produce and join the same kind of metal laminate and the back part.

  The back part is typically a part made of a low melting point metal (a metal having a melting point of about 600 ° C. to 700 ° C.) such as an aluminum alloy, and forms all or most of the head other than the face part.

  For example, in the case of an iron golf club head, the back part is mainly composed of a substantially annular metal member having an opening for receiving a face part, mainly a sole part and a top edge part, and a sole part and a back part. A metal member having a substantially L-shaped bent cross-sectional shape (vertical cross-sectional shape from the sole portion toward the top edge portion), a sole portion, a back portion, and at least a part of the top edge portion are formed. It is composed of a metal member having an L-shaped bent cross-sectional shape (vertical cross-sectional shape from the sole part toward the top edge part). When such a bent back part is employed, it is preferable to provide a space between the face part and the back part. In this case, by extending the space part to the inside of the top edge part or the inside of the sole part, the length that the face part can be bent at the time of hitting the ball can be lengthened, and the rebound characteristics of the head can be improved. .

  In the case of a wood golf club head, the back part typically has a substantially dome-like shape, an opening that is closed by a plate-like or cup-like face part, a crown part, a side part, and a sole part. (Head main body).

  In the case of this embodiment, the joint is made of a material having a lower elastic modulus than the face part. The joint is typically made of a material different from that of the face part, and the peripheral part (end part) of the face part that comes into contact with the joint part and the peripheral part of the back part that comes into contact with the joint part It has a thickness equal to or greater than (the end portion) and can constitute a part of the outer shell of the head alone. The material, configuration, joining method, and the like of the joining portion are basically the same as those described above.

  Moreover, you may comprise at least one part of a back part, and a junction part with the same material. For example, it is conceivable that the entire back part and the joint are made of the above-mentioned resin, or only the sole part of the back part is made of a metal material and the top edge part and the back part are made of the above-mentioned resin. . Thus, by configuring the sole part of the back part with a material having a higher specific gravity than the top edge part and the part that becomes the back part, the center of gravity of the head can be lowered.

  Embodiments of the present invention will be described below with reference to FIGS.

  FIG. 1 shows a wood type golf club in Example 1 of the present invention, and FIG. 2 shows an example of a cross-sectional shape of the wood type golf club head 1 in Example 1.

  As shown in FIG. 1, the wood-type golf club according to the first embodiment includes a golf club head 1, a shaft, and a grip. Since well-known shafts and grips can be used, the description thereof is omitted.

  As shown in FIG. 2, the golf club head 1 according to the first embodiment includes a head main body portion including a face portion 2, a crown portion 3 and a sole portion 4, and a joint portion 5. In the first embodiment, the head main body portion is formed of a titanium alloy, and the face portion 2 is formed of a metal laminate material. Moreover, the junction part 5 is formed with polyamide.

  In the example of FIG. 2, the face portion 2 has a so-called cup shape, and has an extending portion that extends toward the sole portion 4 and the crown portion 3 side. The extension part and the opening end of the head main body part are joined via the joint part 5.

  Next, a method for manufacturing the metal laminate 11 that can be used to form the face portion 2 will be described with reference to FIG. The metal laminate 11 used in the first embodiment is composed of only different metal laminates.

  As shown in FIG. 3, the first use material 6 and the second use material 7 having the same size are alternately laminated in an iron frame 9. An iron lid 8 is placed on these and the periphery is fixed by welding. Thereafter, the air inside the frame 9 is sucked and sealed using a vacuum pump or the like. Note that 53 sheets of β-type titanium alloy sheet having a thickness of 0.3 mm are used as the first use material 6, and 52 sheets of aluminum alloy sheet having a thickness of 0.3 mm are used as the second use material 7.

  Thereafter, the laminated material including the lid 8 having a thickness of 42 mm is hot-rolled together with the lid 8 to a thickness of 3.5 mm, and is subjected to mechanical grinding to remove the lid 8, and finally the thickness is increased. Finish a 2.5 mm thick plate. Thereby, the metal laminate 11 shown in FIGS. 4 and 5 can be formed. Further, heat treatment is performed as necessary, and the β-type titanium alloy and the aluminum alloy are diffusion bonded.

  As a result, as shown in FIG. 5, the thickness of the β-type titanium alloy layer and the aluminum alloy layer becomes very thin, about 20 μm, and each layer is firmly fixed by diffusion bonding. For this reason, the metal laminated material 11 has a property close to one alloy although it is a multilayer material of the metal layer, and has a very high bonding strength as compared with conventionally known clad materials.

  The metal laminate material 11 as described above is subjected to a forging process or the like to produce the face portion 2, and the face portion 2 and the sole portion 4 and the crown portion 3 in the head main body portion are pulsed through the joint portion 5. Joined by pressure sintering. Thereby, the golf club head 1 shown in FIG. 2 is obtained. The golf club shown in FIG. 1 is obtained by connecting the golf club head 1 to the shaft and the grip.

  In the golf club head 1 according to the first embodiment, the face portion 2 can have high strength and low elasticity, and the joint portion 5 is provided to greatly displace the face portion 2 toward the back portion side (backward) at the time of hitting. be able to. As a result, the rebound characteristics of the golf club head can be improved.

  Next, a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment described above, the entire face portion 2 is composed of the dissimilar metal laminate portion of the metal laminate 11, but in this embodiment 2, the dissimilar metal laminate portion and the same kind metal laminate portion are used as materials for producing the face portion 2. The metal laminated material 11 which has both of these is used.

  For example, in order to provide a dissimilar metal laminate at the center of the metal laminate 11 and to provide the same kind of metal laminate at the end (periphery), the sizes of the first and second materials 6 and 7 described above are different. Good.

  In the second embodiment, a laminated portion of an aluminum alloy is provided at the end portion (peripheral portion) of the metal laminated material 11. In order to manufacture such a metal laminate 11, first, the size of the aluminum alloy sheet material is made larger than the size of the β-type titanium alloy sheet material, and the β-type titanium is placed above and below the center of the aluminum alloy sheet material. An alloy sheet material is arranged, and only the aluminum alloy sheet material is laminated at the peripheral portion of the aluminum alloy sheet material. In addition, we will make an effort to actively compensate so that the thickness of the peripheral part does not become too thin. Then, as in Example 1, the laminated material is hot-rolled and mechanically ground, and heat-treated as necessary.

  7 and 8 show a metal laminate 11 that can be used in the second embodiment. As shown in FIG. 8, a single material portion in which an aluminum alloy is laminated and integrated is formed at an end portion (peripheral portion) 13 of the metal laminate material 11.

  Thus, by comprising the edge part 13 of the metal laminated material 11 with a single raw material, compared with the case where a dissimilar metal laminated part is joined with another member, it can join easily and has a favorable joining surface Can also be obtained.

  FIG. 9 shows an example of the shape of the face part 14 that can be used in the second embodiment. As shown in FIG. 9, the face part 14 has a cup-like shape, and a dissimilar metal laminate portion 15 that forms the center portion of the face portion 2, and a homogeneous metal laminate portion that forms at least the tip portion of the extension portion. 16 and the like. The face part 14 can be formed by subjecting the metal laminate 11 shown in FIGS. 7 and 8 to a process such as forging.

  FIG. 10 shows an example of the shape of the head main body 17 that can be used in the second embodiment. As shown in FIG. 10, in the second embodiment, the head main body 17 is made of a resin such as polyamide. In this case, the opening end of the head main body 17 and the vicinity thereof function as a joint. The head main body 17 as shown in FIG. 10 can be molded by, for example, injection molding.

  The face part 14 and the head main body 17 are joined by a pulse current pressure sintering method. Thereby, the golf club head 1 shown in FIG. 11 is obtained. Also in the case of the second embodiment, since the joint portion between the head main body portion 17 and the face part 14 is formed of a resin that is a lower elastic material than the face part 14, the joint portion is preferentially deformed when a ball is hit, The face portion 2 can be greatly displaced toward the back portion side (rear).

  In addition, as shown in FIG. 12, you may provide the receiving part 18 which receives the edge part of the face part 14 in the opening end of the head main-body part 17a. In the example of FIG. 12, the thickness of the opening end of the head main body portion 17a is increased, and the concave portion 19 is provided in the central portion in the thickness direction.

  As shown in FIG. 13, the same kind of metal laminate 16 constituting the end of the face part 14 is received in the recess 19, and the same kind of metal laminate 16 and the head body 17 a Join. According to this example, it is possible to increase the contact area between the same-type metal laminated portion 16 and the head main body portion 17a, and it is possible to more firmly bond the face part 14 and the head main body portion 17a.

  Next, Embodiment 3 of the present invention will be described with reference to FIGS. In the third embodiment, as shown in FIG. 15, the head main body portion 17b is manufactured using the above-mentioned metal laminate 11 or a normal metal material, and the head main body portion 17b and the face portion 2 are shown in FIG. Bonding is performed via the ring-shaped resin 20.

  The ring-shaped resin 20 is made of polyamide, for example. The thickness of the ring-shaped resin 20 is equal to the thickness of the crown portion 3 and the sole portion 4. On the other hand, the width (length in the axial direction) of the ring-shaped resin 20 is about 2 mm or more and 10 mm or less. It is considered that if the width of the ring-shaped resin 20 is less than 2 mm, it becomes difficult to mold the resin, and the mechanical strength is also low, making it difficult to withstand the impact at the time of hitting the ball, and the width of the ring-shaped resin 20 is less than 10 mm. This is because when it becomes larger, it is considered that the ring-shaped resin 20 is easily damaged due to a bending moment caused by a radial force applied to the ring-shaped resin 20.

  For joining the ring-shaped resin 20 and the head main body portion 17b, and joining the face portion 2 and the ring-shaped resin 20, a pulse current pressure sintering method can be used.

  When the head main body portion 17b is manufactured from the metal laminate 11, it is preferable that the opening end of the head main body portion 17b and the vicinity thereof are formed of the same kind of metal laminate portion as in the case of the face part 14 in the second embodiment. .

  In addition, as shown in FIG. 16, a resin plate 21 can be used instead of the ring-shaped resin 20. The thickness of the resin plate 21 is also preferably about 2 mm or more and 10 mm or less. Thereby, the mechanical strength of the joint can be ensured without increasing the mass too much. Further, by adopting the resin plate 21, the contact area between the resin plate 21 and the head main body portion 17b can be easily secured.

  Next, Embodiment 4 of the present invention will be described with reference to FIGS. 17 and 18. In the fourth embodiment, as shown in FIG. 17, resin plates 21 and 22 are bonded to both the head main body 17b and the face parts, respectively.

  As in the case of Example 2, the face part has a cup-like shape, and the dissimilar metal laminate portion 15 that forms the hitting portion of the face portion 2 and the surrounding portion thereof, and at least the tip portion of the extending portion are provided. It has the same kind metal lamination part 16 to form. Then, the resin plates 21 and 22 are joined by a technique such as diffusion bonding or adhesion. Thereby, the golf club head 1 having the form shown in FIG. 18 is obtained.

  In addition, it is also possible to employ a resin ring instead of the resin plates 21 and 22. Further, a resin plate and a ring-shaped resin can be used in combination.

  Next, Embodiment 5 of the present invention will be described with reference to FIGS. 19 and 20. In the fifth embodiment, the face part and the head main body including the crown portion 3 and the sole portion 4 are joined using the ring-shaped metal 23 and the metal plate 24 shown in FIGS.

  As a material for the ring-shaped metal 23 and the metal plate 24, a low melting point metal material having a melting point of about 600 ° C. to 700 ° C. is used. The width of the ring-shaped metal 23 and the thickness of the metal plate 24 are also preferably about 2 mm or more and 10 mm or less.

  In the fifth embodiment, a single low melting point metal material or a metal laminate similar to that shown in FIG. 9 is used as the face part material. On the other hand, a resin such as polyamide is adopted as the material of the head main body. The head main body can be molded by injection molding.

  The ring-shaped metal 23 and the metal plate 24 are joined to the head main body by a pulse current pressure sintering method. Thereafter, the ring-shaped metal 23 or the metal plate 24 and the face part are joined by a technique such as welding or adhesion. Thereby, the golf club head shown in FIGS. 20A and 20B is obtained. 20A and 20B show the case where a metal laminate is used as the material for the face part.

  Next, Embodiment 6 of the present invention will be described with reference to FIG. In Example 6, the idea of the present invention is applied to an iron type golf club head.

  As shown in FIG. 21, the golf club head 1 has a face part 14 including a face part 2, a back part 25, and a joint part 5. The face part 14 has a plate shape and is composed of the metal laminate material 11 described above. The back part 25 is made of an aluminum alloy, forms a part of the top edge portion 27, the back portion 26, and the sole portion 4, and has a substantially L-shaped cross-sectional shape. The joint 5 is made of polyamide. The joint part 5 is used to join the face part 14 and the back part 25 together.

  In the example of FIG. 21, a space portion 28 is provided between the face part 14 and the back part 25. More specifically, the space 28 is provided by forming a recess on the surface of the back part 25 and joining the face part 14 and the back part 25 with the recess facing the face part 14 side.

  Note that at least one of the face part 14 and the back part 25 may have a cup shape, and the space 28 may be provided therebetween. In the example of FIG. 21, the space portion 28 extends in the vicinity of the top edge portion 27 and in the sole portion 4, and extends rearward only on the top edge portion 27 side. The space portion 28 may be extended in the vicinity of the edge portion 27 and in the sole portion 4 and may be extended forward or backward in both the top edge portion 27 side and the sole portion 4 side. You may make it extend in the part 4 and extend straight along the face part 2. FIG.

  Further, the golf club head 1 shown in FIG. 21 is an iron type golf club head having both a hollow portion (space portion 28) and a cavity portion. The idea can be applied.

  Next, Embodiment 7 of the present invention will be described with reference to FIG. In the seventh embodiment, the face part 14 is composed of a face plate formed of the above-described metal laminate 11, and the back part 25 is composed of an aluminum alloy having a substantially annular shape having an opening.

  As shown in FIG. 22, in the golf club head 1 according to the seventh embodiment, a receiving portion 30 that receives the face part 14 is provided around the opening of the back part 25, and the face 30 is connected to the receiving portion 30 via the joint portion 5. Parts 14 are joined.

  In addition, in the example of FIG. 22, although the junction part 5 is formed with the ring-shaped member, it is also possible to use a plate-shaped member. Further, in the example of FIG. 22, the face part 14 and the back part 25 are joined only by joining by the joining part 5, but in addition to joining by the joining part 5, the face part 14 is subjected to press fitting or welding. You may make it join with the back parts 25 in a peripheral part.

  Furthermore, although the golf club head 1 shown in FIG. 22 is a so-called cavity iron head having a cavity portion 29, the idea of the seventh embodiment can be applied to a hollow iron having no cavity portion.

  Although the embodiments and examples of the present invention have been described above, the characteristic configurations of the above-described examples can be appropriately combined. Moreover, it should be thought that embodiment and the Example which were disclosed this time are illustrations in all points, and are not restrictive. The scope of the present invention is defined by the terms of the claims, and includes meanings equivalent to the terms of the claims and all modifications within the scope.

  The present invention can be effectively applied to golf club heads and golf clubs.

It is a side view of the golf club in Example 1 of this invention. It is sectional drawing of the golf club head in Example 1 of this invention. It is a figure which shows an example of the manufacturing process of the metal laminated material which can be used for the golf club head in Example 1 of this invention. It is sectional drawing of the metal laminated material which can be used in Example 1 of this invention. It is the elements on larger scale in the area | region 10 in FIG. It is a figure which shows an example of the manufacturing process of the metal laminated material which can be used for the golf club head in Example 2 of this invention. It is sectional drawing of the metal laminated material which can be used in Example 2 of this invention. It is the elements on larger scale in the area | region 12 in FIG. It is sectional drawing of the face parts which can be used for the golf club head in Example 2 of this invention. It is sectional drawing of the head main-body part which can be used for the golf club head in Example 2 of this invention. It is sectional drawing of the golf club head in Example 2 of this invention. It is sectional drawing of the modification of the head main-body part of the golf club head in Example 2 of this invention. It is sectional drawing of the modification of the golf club head in Example 2 of this invention. It is a perspective view of ring-shaped resin which can be used for the golf club head in Example 3 of this invention. It is sectional drawing which shows the state which joined the ring-shaped resin to the head main-body part of the golf club head in Example 3 of this invention. It is a figure which shows the case where a resin plate is used instead of a ring-shaped resin. It is a figure which shows the head main-body part and face part which can be used for the golf club head in Example 4 of this invention. It is sectional drawing of the golf club head in Example 4 of this invention. (A), (b) is a perspective view which shows the ring-shaped metal and metal plate which can be used for the golf club head in Example 5 of this invention. (A), (b) is sectional drawing of the golf club head in Example 5 of this invention. It is sectional drawing of the golf club head in Example 6 of this invention. It is sectional drawing of the golf club head in Example 7 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Golf club head, 2 Face part, 3 Crown part, 4 Sole part, 5 Junction part, 6 1st use material, 7 2nd use material, 8 Lid, 9 frame, 10, 12 area | region, 11 Metal laminated material, 13 End, 14 Face parts, 15 Dissimilar metal laminated part, 16 Homogeneous metal laminated part, 17, 17a, 17b Head main body part, 18, 30 Receiving part, 19 Recessed part, 20 Ring-shaped resin, 21,22 Resin plate, 23 Ring Metal, 24 metal plate, 25 back part, 26 back part, 27 top edge part, 28 space part, 29 cavity part.

Claims (13)

A golf club head having an outer shell structure,
A face part (2), a crown part (3) and a sole part (4);
The face part (2), the crown part (3) and the sole part (4) are joined between the face part (2) and the crown part (3) and the sole part (4). A joint (5)
The golf club head according to claim 1, wherein the joint portion (5) is made of a material having a lower elastic modulus than the face portion (2).   The golf club head according to claim 1, wherein the crown portion (3), the sole portion (4), and the joint portion (5) are made of the same material.   The said face part (2) was produced using the metal laminated material (11) containing the dissimilar-metal laminated part (15) which laminated | stacked and integrated the dissimilar metal of the thickness of 0.1 micrometer or more and 100 micrometers or less. Item 3. A golf club head according to Item 2. The face part (2) has an extending part extending to at least one side of the crown part (3) and the sole part (4),
The metal laminate (11) has the same kind of metal laminate (16) formed by laminating and integrating the same kind of metal at the peripheral part,
4. The golf club head according to claim 3, wherein the extending portion is configured by the same-type metal laminate portion (16), and the same-type metal laminate portion (16) and the joint portion (5) are joined. A face part (14) including a face part (2);
A back part (25) joined to the face part (14) via a joint (5);
The golf club head according to claim 1, wherein the joint portion (5) is made of a material having a lower elastic modulus than the face part (14).   The golf club head according to claim 5, wherein the back part (25) and the joint (5) are made of the same material.   The said face part (14) was produced using the metal laminated material (11) containing the dissimilar metal laminated part (15) which laminated | stacked and integrated the dissimilar metal of the thickness of 0.1 micrometer or more and 100 micrometers or less. Item 7. The golf club head according to item 6. The face part (14) has an extending part extending to the back part (25) side,
The metal laminate (11) has the same kind of metal laminate (16) formed by laminating and integrating the same kind of metal at the peripheral part,
The golf club head according to claim 7, wherein the extension portion is configured by the same metal laminate portion (16), and the same metal laminate portion (16) and the back part (25) are joined.   The golf club head according to any one of claims 1 to 8, wherein the joint portion (5) is made of a resin.   The golf club head according to claim 9, wherein the melting point of the resin is 300 ° C. or higher and 500 ° C. or lower.   The said junction part (5) and the said face part (2) were joined by diffusing the material of the said junction part (5) and the material of the said face part (2) mutually. 4. A golf club head according to any one of claims 9, 9 and 10.   The said junction part (5) and the said face part (14) were joined by mutually diffusing the material of the said junction part (5) and the material of the said face part (14) from Claim 6 to Claim 6. Item 11. The golf club head according to any one of Items 10.   A golf club comprising the golf club head according to claim 1.

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