JP3124540U - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To combine a first plate body and a second plate body to form a composite plate body, and a plurality of projecting ribs and a projecting portion such as one reinforced projecting body are formed on the second plate body. The structural strength and vibration absorption of the composite plate can be relatively increased by the protruding ribs or the reinforcing protrusions, and the weight of the composite plate can be relatively increased by the first plate. The stability and durability of the hit ball of the golf club head can be relatively increased.
A head body 1 and composite plate bodies 21 and 22 are used. An opening 10 is formed in the head body 1. The composite plate is provided with a plate 21 made of different materials and a plurality of protrusions 221. The plate 21 has a front surface and a back surface. The projecting portion is provided on the back surface of the plate body 21, and the plate body 21 is coupled so as to correspond to the opening 10 of the head body 1, thereby forming a golf club head jointly.
[Selection] Figure 1

Description

  The present invention relates to a golf club head. Particularly, a plate body made of different materials and a plurality of protrusions are combined to form a composite plate body, thereby increasing the strength of the structure of the plate body. The present invention relates to a golf club head.

  A conventional golf club head structure includes a face plate and a housing, and the face plate is coupled to the front surface of the housing. A protruding lump is provided on the back surface of the face plate, and the protruding lump is formed on the face plate so as to be integrated. The protruding mass is selectively formed in a spiral structure or a plurality of annular structures. There is one in which the position of the center of gravity of the golf club head can be changed by installing the protruding mass (see, for example, Patent Document 1).

Further, the structure of a conventional golf club head includes the following steps as a method for joining the golf club head. a) A first plate member and a second plate member made of different metal materials are formed by joining a synthetic plate member by explosion welding, and the synthetic plate member is again formed into a shell-like first member, and the shape of the first member is a head Corresponding to a portion of the front face plate, and the first plate member is positioned on one side of the head surface relative to the first member; and b) forming the synthetic plate member on the face plate. A step of removing the central portion of the second plate material and leaving only the peripheral portion of the second plate material to weld and bond the head body; and c) attaching the face plate to the head Composing a golf club head jointly by approaching the main body, bringing the peripheral edge of the second plate material of the face plate into contact with the second member, and welding and connecting the second member and the first member again I tried to do it too Is (e.g., see Patent Document 2).
US Patent No. 5,776,011 Republic of China No. 550106

  In the structure of the conventional golf club head as described above, the protrusion lump is formed so as to be integrated with the same material as the face plate. Therefore, when a material having a high elastic deformation ability is used, the protrusion There is a problem that the lump cannot effectively absorb the vibration absorbing ability of the golf club head. On the other hand, when a material having high vibration absorption is adopted, there is a problem that the face plate relatively reduces the degree of freedom of elastic deformation during the hitting process. Simply put, the conventional golf club head structure described above has a problem that it cannot have the dual advantage of high vibration absorption and high elastic deformation ability.

  Further, in the structure of the conventional golf club head as described above, the center portion (sweet spot sweet spot) of the first plate member of the golf club head receives a relatively large stress and impact force when hitting. However, the second plate member is not provided in the central portion of the first plate member, and the back surface of the central portion of the first plate member is substantially the same as the thickness of the first plate member itself. Since sufficient structural strength cannot be provided at the central portion of the first plate material, the first plate material not only deforms or ruptures when used for a long period of time, but also effectively absorbs vibration of the hit ball. Since this is not possible, there has been a problem that the service life is relatively short. Thus, the structure of the conventional golf club head as described above must be further improved.

  The present invention has been devised in view of such problems. The object of the present invention is to combine a first plate and a second plate to form a composite plate, and to The plate is processed until a plurality of protruding ribs and a protruding portion such as a reinforced protrusion are formed, and the structural strength and vibration absorption of the composite plate are relative to each other by the protruding rib or the reinforcing protrusion. To increase. The first plate is intended to provide a golf club head used for relatively reducing the weight of the composite plate and further improving the stability and durability of a golf club head. is there.

  The first object of the present invention is to combine a first plate and a second plate to form a composite plate, and a plurality of protruding portions such as a plurality of protruding ribs are formed on the second plate. Thus, it is an object of the present invention to provide a golf club head capable of improving the structural strength, the service life, and the stability of the hit ball by processing until it is finished.

  The second object of the present invention is to increase the structural strength of the plate, the service life and the stability of the hit ball by processing until the second plate is formed with another reinforcing protrusion. An object of the present invention is to provide a golf club head that can be used.

  A third object of the present invention is to combine a first plate and a second plate to form a composite plate, and the first plate has a relatively good elastic deformation capability, An object of the present invention is to provide a golf club head in which the two-plate body is formed so as to have a relatively good vibration absorption capability, thereby improving the elastic deformation capability and the vibration absorption capability.

In order to achieve the above object, a golf club head according to the present invention is as follows. That is,
Consists of a head body and a face plate. The head main body includes a crown portion, a sole portion, a back portion and side portions, an opening is formed in the front surface of the head main body, and a hosel is provided in one of the head main bodies. The face plate is provided with a metal plate and a plurality of metal protrusions, the metal plate is formed with an outer surface and an inner surface, and the plurality of metal protrusions are provided on the inner surface of the metal plate. The material of the metal plate is different from the material of the metal protrusion, and a groove is formed between each of the two metal protrusions, and the face plate is coupled to correspond to the opening of the head body. As a result, a golf club head is formed.

  In the golf club head according to the present invention, at least one of an explosion weld layer, a roll layer, and an adhesive layer may be selectively formed between the metal plate body of the face plate and the metal protruding portion. In addition, the metal protrusion may be selectively made of at least one of a spiral protrusion, an annular protrusion, and a net-like protrusion. In addition, the head main body is provided with a coupling peripheral wall, the coupling peripheral wall is formed on the inner peripheral surface of the opening of the head main body, and the coupling plate is provided on the metal plate of the face plate. Can also be used for coupling to correspond to the coupling peripheral wall of the head body. In addition, the material of the metal plate of the face plate can be made of a material having a selectively high elastic deformation ability. Further, the material of the metal plate of the face plate can be made of a material having a selectively high vibration absorption capability. In addition, the specific gravity of the material of the metal plate body may be formed to be relatively lower than the specific gravity of the material of the metal protrusion.

  The golf club head according to the present invention is composed of a head body and a plurality of protrusions. The head body includes a face plate, a crown plate, a sole plate, a back plate and a side plate, and they jointly form a hollow portion, and each has an outer surface and an inner surface, and the head body is a first body. The hosel is provided on one side of the head body. The plurality of protrusions are made of a second material, and are selectively provided on at least one inner surface of a face plate, a crown plate, a sole plate, a back plate and a side plate, and the second material is the first material. Unlike one material, at least one of an explosion weld layer, a roll layer, and an adhesive layer is selectively formed between the first material and the second material.

  Furthermore, the golf club head according to the present invention includes a head body, a face plate, a hosel, and a plurality of protrusions. The head body is provided with a crown portion, a sole portion, a back portion and side portions, and an outer surface and an inner surface are formed. A front surface is formed opposite to the other back portion of the head body. Made of one material. The face plate is provided on the front surface of the head body. The hosel is provided on one side of the head body. The plurality of protrusions are selectively made of at least one of a spiral protrusion, an annular protrusion, and a net-like protrusion, and are made of a second material and selectively formed on the inner surface of the side plate of the head body. The second material is different from the first material, and the specific gravity of the second material is greater than the specific gravity of the first material, and is selectively between the head body and the protrusion. At least one of an explosion weld layer, a roll layer and an adhesive layer is formed.

  According to the golf club head of the present invention, the first plate body and the second plate body are joined to form a composite plate body, and a plurality of projecting portions such as a plurality of projecting ribs are formed on the second plate body. By processing until it is formed, there is an advantage that the structural strength, service life and stability of the hit ball are increased.

  According to the golf club head of the present invention, the structural strength of the plate body, the service life and the stability of the hit ball are improved by processing the second plate body until another reinforcing protrusion is formed. There is an advantage that can be.

  According to the golf club head of the present invention, the first plate and the second plate are joined to form a composite plate, and the first plate has a relatively good elastic deformation capability, By forming the second plate so as to have a relatively good vibration absorption capability, there is an advantage that the elastic deformation capability and the vibration absorption capability can be enhanced.

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

  Referring to FIG. 1, in the first embodiment of the present invention, the golf club head can be selected from a conventional head structure such as a wood type, an iron type or a putter type. In the first embodiment of the present invention, an iron-type head is taken as an example, and the iron-type head includes a head body 1 and a face plate 2 (composite plate). The face plate 2 is formed by joining a first plate body 21 and a second plate body 22. The first plate 21 is the main body of the face plate 2 and is coupled so as to correspond to the head body 1. After the second plate 22 is formed into various protrusions by processing, the second plate 22 is formed as a reinforcing structure of the first plate 21.

  Referring to FIGS. 1 and 2 again, the material of the head body 1 according to the first embodiment of the present invention is carbon steel, stainless steel (for example, 17-4PH stainless steel), alloy steel, ferro-manganese-aluminum alloy, nickel alloy, cast iron. It can be selected from metals such as superalloy steel, titanium alloy, copper alloy, aluminum alloy, magnesium alloy, carbon fiber, non-metal, or a combination of the above materials. The head body 1 includes a crown portion, a sole portion, a back portion and a side portion, and these jointly form a hollow portion. An opening 10, a coupling wall 11 and a hosel 12 are formed in the head main body 1. The opening 10 is opened in front of the head body 1. By forming the coupling wall 11 on the inner peripheral surface of the opening 10 of the head body 1, the coupling wall 11 can be coupled with the face plate 2. The hosel 12 can be coupled to a shaft (not shown) by being provided so as to extend to one side of the head body 1 by an integral molding or assembling method.

  Referring to FIGS. 1 and 2 again, the first plate body 21 according to the first embodiment of the present invention can be selected from materials having a relatively high elastic deformation capability, such as stainless steel, carbon steel, ferro-manganese. -It can be selected from metal materials such as aluminum alloy, aluminum alloy, magnesium alloy or titanium alloy. The first plate 21 includes a front surface 211, a coupling peripheral surface 212, and a back surface 213. The front surface 211 is used for hitting a ball. The coupling peripheral surface 212 is used for coupling so as to correspond to the coupling wall 11 of the head body 1. The back surface 213 is positioned on the other surface of the first plate body 21 relative to the front surface 211 and is used for coupling with the second plate body 22.

  Referring again to FIGS. 1 and 2, the second plate 22 of the first embodiment of the present invention can be selected from a material (different material) different from the first plate 21, for example, relatively high vibration absorption capability. For example, carbon steel, stainless steel (for example, 17-4PH stainless steel), alloy steel, nickel alloy, cast iron, superalloy steel, titanium alloy, copper alloy, aluminum alloy, magnesium alloy or the above A combination of metal materials can be selected. The second plate 22 includes a coupling surface (not shown), and the coupling surface is coupled so as to correspond to the back surface 213 of the first plate 21. The first plate 21 and the second plate 22 are preferably selectively connected to each other using a method such as explosion welding, roll pressing, adhesion, or a combination of the above, so that the first plate 21 and the second plate 22 The plate 22 jointly forms the face plate 2 (composite plate). When the method of coupling by explosion welding or roll pressing is selected, an explosion welding layer or roll pressing layer is formed between the first plate 21 and the second plate 22 so as to be integrally formed. When selecting a bonding method by adhesion, an adhesive layer is formed between the first plate body 21 and the second plate body 22 by applying an adhesive.

  Referring to FIGS. 1 and 2 again, when the face plate 2 according to the first embodiment of the present invention is preformed, the second plate 22 is first selectively utilized by a method such as milling, etching, polishing, or a combination thereof. The remaining portion of the second plate body 22 is processed until a projecting portion such as one reinforced projecting body 221 and a plurality of projecting ribs 222 is formed on the back surface 213 of the first plate body 21. . The protrusion is a protrusion having a high vibration absorption capability or a protrusion made of a different material, and can be used to increase the vibration absorption capability and structural strength of the face plate 2. In addition, a plurality of recessed grooves 223 are formed between the reinforcing protrusions 221 and the protruding ribs 222 and adjacent to the two protruding ribs 222, and the first plate body 21 is formed by the recessed grooves 223. Since the space for elastic deformation to the rear can be provided, the degree of freedom of elastic deformation of the face plate 2 can be provided.

  Referring to FIGS. 1 and 2 again, when the golf club head according to the first embodiment of the present invention is assembled, the coupling peripheral surface 212 of the face plate 2 is coupled so as to correspond to the coupling wall 11 of the head body 1. Further, the front surface 211 of the face plate 2 is aligned with the end edge of the coupling wall 11. The head body 1 and the first plate body 21 of the face plate 2 can preferably select a joining method such as tungsten inert gas arc welding, laser beam welding, electron beam welding or plasma arc welding, and further, brazing, sticking, Other coupling schemes such as fitting or screwing can also be selected. Thus, the head body 1 and the face plate 2 jointly form a golf club head (not shown). Furthermore, the lip edge of the back surface 213 can be used to be coupled so as to correspond to the corresponding position on the front surface of the head body 1 according to the demand in use of the product.

  Referring to FIGS. 1 and 2 again, the face plate 2 according to the first embodiment of the present invention is formed as a composite face plate, and the reinforcing protrusion 221 of the second plate 22 is a sweet spot (sweet spot) of the hit ball of the face plate 2. The projecting ribs 222 are distributed around the circumference of the reinforcing projecting body 221 as an annular shape or a spiral shape. By uniformly dispersing the stress of the hit ball by the protrusions of different materials such as the reinforcing protrusion 221 and the protrusion rib 222, the structural strength and service life of the face plate 2 can be relatively increased. Further, by providing a space for elastic deformation by the recessed groove 223, the degree of freedom of elastic deformation of the face plate 2 can be relatively increased. In addition, the first plate 21 is selected from a material having a high elastic deformation capability, and the second plate 22 is selected from a vibration absorption material having a high vibration absorption capability. The ability to deform and the ability to absorb vibration can be increased at the same time, and the stability and structural strength of the golf club head can be improved.

  Referring to FIG. 3, a golf club head according to a second embodiment of the present invention is posted. Compared with Example 1, Example 2 uses a wood-type head as an example, and by appropriately milling the reinforcing protrusions 221 and protruding ribs 222, the thickness of both is reduced from the top to the bottom. It is formed into a structure having a change in thickness so as to become thicker gradually. By increasing the thickness of the reinforcing protrusions 221 and the protruding ribs 222 that approach the bottom of the face plate 2, the weight of the bottom of the golf club head also increases relatively. Therefore, the position of the overall center of gravity of the golf club head is lowered. Can do. Thereby, in the present invention, the stability of the hit ball of the golf club head and the adjustment of the position of the center of gravity can be further effectively improved.

  4 and 5, a golf club head according to a third embodiment of the present invention is posted. Compared with Example 2, Example 3 also takes a wood-type head as an example, and the first plate body 21 'and the second plate body 22' are joined together to form a cover plate 2 '(composite type). Plate). After the first plate body 22 ′ and the second plate body 22 ′ are coupled to each other, the second plate body 22 ′ is processed until projecting portions such as a plurality of projecting ribs 221 ′ are formed. 221 'is formed in an annular structure. In addition, a plurality of recessed grooves 222 ′ are formed between the protruding ribs 221 ′, and a space for elastic deformation can be provided by the recessed grooves 222 ′. Therefore, the elastic deformation of the lid plate 2 ′ is free. The degree can be increased. The lid plate 2 ′ selectively utilizes a coupling method such as tungsten inert gas arc welding, laser beam welding, electron beam welding or plasma arc welding, and further selectively other such as brazing, adhesion, fitting or screwing. The portion of the opening 11 of the head main body 1 can be coupled by using the coupling method. The lid plate 2 ′ can be preferably selected from a crown plate, but can be selected from a sole plate, a side plate or a back plate of the head body 1 according to usage demands. As a result, the head body 1 and the cover plate 2 'jointly form a golf club head (not shown). In addition, the first plate body 21 ′ and the second plate body 22 ′ are also made of different materials, and the material of the first plate body 21 ′ is relatively low relative to the material of the second plate body 22 ′. Therefore, the protruding rib 221 ′ is formed so as to be positioned on the back surface of the first plate body 21 ′, so that the specific gravity of the lid plate 2 ′ can be increased by installing the first plate body 21 ′ and the protruding rib 221 ′. Further, the structural strength of the golf club head can be increased and the position of the center of gravity can be adjusted.

  Referring to FIG. 6, a golf club head according to a fourth embodiment of the present invention is posted. Compared with Example 3, in Example 4, the lid plate 2 ′ is preferably selected from the side plates, and the lid plate 2 ′ has a plurality of protruding ribs 221 ′ and a plurality of ribs 221 ′ with respect to the second plate body 22 ′. Proper processing is performed until protrusions such as individual recessed grooves 222 ′ are formed, and the recessed grooves 222 ′ can also be selected from geometric shapes such as a circle, a triangle, a rectangle, and a regular polygon. A predetermined gap is formed between the recessed grooves 222 ′, and the protruding ribs 221 ′ of the second plate body 22 ′ are further arranged in a net shape or a honeycomb shape, and the protruding ribs 221 ′ are further arranged on the lid plate 2 ′. The structural strength of the lid plate 2 ′ can be increased by the protruding rib 221 ′. In particular, the area occupied by the recessed groove 222 ′ from the front surface of the head body 1 to the back surface thereof is formed so as to gradually decrease from large to small. Since the large-area recessed groove 222 ′ is relatively close to the front of the head body 1, the cover plate 2 ′ has a relatively small number of protruding ribs 221 ′ that approaches the front side (front side) of the head body 1, and the cover The number of projecting ribs 221 ′ where the plate 2 ′ approaches the back side (rear side) of the head body 1 is relatively large. Thus, the weight of the front side of the cover plate 2 'approaching the head body 1 is smaller than the weight of the back side of the cover plate 2' approaching the head body 1, so that the center of gravity of the golf club head moves backward. Therefore, in the present invention, the stability and the service life of the golf club head can be reliably increased. Further, the lid plate 2 'can be formed as a sole plate, a crown plate or a back plate of the head main body 1 according to the demand in use.

  Referring to FIG. 7, a golf club head according to a fifth embodiment of the present invention is posted. Compared to Example 4, in Example 5, the lid plate 2 'is preferably selected from a sole plate, and the lid plate 2' has a plurality of protruding ribs 221 'relative to the second plate body 22'. Proper processing is performed until protrusions such as a plurality of recessed grooves 222 ′ are formed, and the recessed groove 222 ′ is selected from a rectangular structure, and the recessed groove 222 ′ is also circular, triangular, rectangular, regular multi-sided You can select from geometric shapes such as shapes. The protruding ribs 221 ′ are net-like and distributed between the recessed grooves 222 ′, and the area of the recessed grooves 222 ′ is gradually decreased from large to small relative to the front surface to the back surface of the head body 1. Since the protrusion rib 221 ′ is formed and increases the structural strength of the cover plate 2 ′, it is possible to adjust the overall center of gravity of the golf club head to move backward. Stability and service life can be reliably increased. Further, the lid plate 2 'can be formed as a crown plate, a side plate or a back plate of the head main body 1 according to the demand in use.

  As described above, according to the structure of the conventional golf club head, the problem of reducing the ability to absorb vibration is reduced because only a spiral or annular protruding lump is installed using an integral molding method. There is a problem, or the composite type face plate is only bonded to the second plate material at the peripheral portion of the back surface of the first plate body, so that the structural strength of the central portion of the face plate is lowered. However, according to the golf club head of the present invention shown in FIG. 1, the first plate 21 and the second plate 22 are combined to form a composite plate, and the face plate 2 or The cover plate 2 ′ is processed until the projecting portions such as the reinforcing projecting body 221 and the projecting rib 222 are formed on the second plate body 22, and a plurality of recessed grooves 223 are formed between the projecting ribs 222. By the relative above Structural strength of coupling type plate member, it is possible to further increase the degree of freedom of the vibration absorption and elastic deformation. Further, the degree of freedom of elastic deformation of the face plate 2 can be relatively increased by the first plate body 21 and the stability and durability of the golf club head can be further improved.

  The present invention may be implemented in other ways without departing from the spirit and essential characteristics thereof. Accordingly, the preferred embodiments described herein are illustrative and not limiting.

It is a disassembled perspective view of the golf club head of Example 1 of this invention. It is sectional drawing which shows the state assembled by the golf club head of Example 1 of this invention. It is a disassembled perspective view of the golf club head of Example 2 of this invention. It is a top view which shows the state assembled by the golf club head of Example 3 of this invention. It is sectional drawing of the local part of the composite-type board body by the golf club head of Example 3 of this invention. It is a top view which shows the state assembled by the golf club head of Example 4 of this invention. It is a disassembled perspective view of the golf club head of Example 5 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Head main body 10 Opening 11 Connection surrounding wall 12 Hosel 2 Face board 2 'Cover plate 21 1st board 21' 1st board 211 Front 211 'Front 212 Joining peripheral surface 212' Joining peripheral surface 213 Back surface 213 'Back surface 22 Second Plate body 22 ′ Second plate body 221 Strengthening projection body 221 ′ Projection rib 222 Projection rib 222 ′ Groove 223 Groove

Claims (15)

  A golf club head composed of a head main body (1) and a face plate (2), the head main body (1) including a crown portion, a sole portion, a back portion and a side portion, and a front surface of the head main body (1). Has an opening (10), a hosel (12) is provided on one of the head bodies (1), and a metal plate (21) and a plurality of metal protrusions are provided on the face plate (2). The metal plate (21) has an outer surface and an inner surface, and the plurality of metal protrusions are provided on the inner surface of the metal plate (21). Unlike the material of the metal protrusion, a groove (223) is formed between the two metal protrusions and the face plate (2) is formed in the opening (10) of the head body (1). Formed golf club head by correspondingly coupled Golf club head according to claim Rukoto.   2. An explosive weld layer, a roll layer, and an adhesive layer are selectively formed between the metal plate body (21) of the face plate (2) and the metal protruding portion. Golf club head.   2. The golf club head according to claim 1, wherein the metal protrusion is selectively made of at least one of a spiral protrusion, an annular protrusion, and a net-like protrusion.   The head body (1) is further provided with a coupling peripheral wall (11), the coupling peripheral wall (11) is formed on the inner circumferential surface of the opening (10) of the head body (1), and the metal of the face plate (2). The plate body (21) is further provided with a coupling peripheral surface (212), and the coupling peripheral surface (212) is used for coupling so as to correspond to the coupling peripheral wall (11) of the head body (1). The golf club head according to claim 1, wherein:   2. The golf club head according to claim 1, wherein a material of the metal plate body (21) of the face plate (2) is made of a material having a selectively high elastic deformation ability.   The golf club head according to claim 1, wherein the metal plate (21) of the face plate (2) is made of a material having a selectively high vibration absorption capability.   The golf club head according to claim 1, wherein the specific gravity of the material of the metal plate (21) is relatively lower than the specific gravity of the material of the metal protrusion.   A golf club head comprising a head body (1) and a plurality of protrusions, the head body (1) including a face plate, a crown plate, a sole plate, a back plate and a side plate, which are joint The hollow body is formed, and the outer surface and the inner surface are formed respectively. The head body (1) is made of a first material, and one of the head body (1) is provided with a hosel (12). The plurality of protrusions are made of a second material, and are selectively provided on at least one inner surface of a face plate, a crown plate, a sole plate, a back plate, and a side plate, and the second material is A golf club head characterized in that, unlike the first material, at least one of an explosion weld layer, a roll layer and an adhesive layer is selectively formed between the first material and the second material.   The protrusion is selectively provided on the inner surface of the face plate of the head body (1), and the thickness of the protrusion is gradually increased from the crown plate side to the sole plate side of the head body (1). The golf club head according to claim 8, wherein the golf club head is formed.   9. The golf club head according to claim 8, wherein the projecting portion selectively comprises at least one of a spiral projecting portion, an annular projecting portion, and a net-like projecting portion.   The protrusions are selectively provided on the inner surface of at least one of the crown plate, the sole plate and the side plate of the head body (1), and the number of protrusions gradually increases from the front side to the back side of the head body (1). 9. The golf club head according to claim 8, wherein the golf club head is formed so as to increase.   9. The golf club head according to claim 8, wherein a groove (223) is formed between each of the two protrusions.   The protrusion is selectively provided on at least one inner surface of the crown plate, the sole plate and the side plate of the head body (1), and the area of the groove (223) formed by the protrusion is the head body (1). 9. The golf club head according to claim 8, wherein the golf club head is formed so as to gradually decrease from the front side to the back side.   The golf club head according to claim 8, wherein the specific gravity of the first material of the head body (1) is formed to be relatively lower than the specific gravity of the second material of the protrusion.   A golf club head comprising a head body (1), a face plate (2 '), a hosel (12), and a plurality of protrusions, the head body (1) having a crown portion, a sole portion, a back portion and a side An outer surface and an inner surface are formed, a front surface is formed opposite to the other back of the head body (1), the head body (1) is made of a first material, The face plate (2 ′) is provided on the front surface of the head body (1), the hosel (12) is provided on one side of the head body (1), and the plurality of protrusions are selectively spiral protrusions, It consists of at least one of an annular protrusion and a net-like protrusion, and is made of a second material, and is selectively provided on the inner surface of the side plate of the head body (1), the second material being the first material Unlike the above second material The specific gravity is formed so as to be greater than the specific gravity of the first material, and at least one of an explosion weld layer, a roll layer, and an adhesive layer is selectively formed between the head body (1) and the protruding portion. Features golf club head.

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