JP2003199849A - Hollow golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hollow golf club head which can easily and firmly secure a mass body to a sole portion of the head main body, in securing the mass body comprising a different material from a metal material of which the head main body is composed to the head main body. <P>SOLUTION: The above mass body 20 is secured to the inner surface 5a of the sole portion 5, by connecting by welding the securing members 23 to the sole portion 5, with mass body 20 comprising the different material from the metal material of which the head main body 1 is composed pinched by the securing members 23 made of a metal material weldable with the sole portion 5 on the inner surface 5a of the sole portion 5 of the head main body 1. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixing structure of a mass body fixed inside a hollow golf club head made of metal, and more particularly, to the hollow golf club. The present invention relates to a hollow golf club head in which a mass body made of a material different from a metal material constituting a head body of the head is easily and firmly fixed to the head body. Conventionally, metal golf club heads such as iron club heads or wood club heads have been made of a metal material such as soft iron or stainless steel. Recently, however, titanium and titanium alloys have been used. Metal materials having a small specific gravity and high strength, such as aluminum alloys, have come to be used. In the golf club head made of the metal material, the golf club head is hollowed to increase its volume to increase the moment of inertia, and further, the head is placed in the hollow portion of the hollowed head body. Various characteristics of the golf club are set by fixing a weight distribution of the golf club head by fixing a mass body made of a metal material different from the metal material constituting the main body. For example, in order to easily lift the hit ball and increase the flight distance, a mass body made of a metal material different from the metal material constituting the head body, particularly a material having a large specific gravity, is attached to the head body such as a sole. Attempts to lower the center of gravity by fixing. It is also known that the above-mentioned titanium or titanium alloy and a dissimilar metal have poor weld jointability in conventional TIG welding and the like, and joint strength cannot be obtained. Therefore,
When the head body is formed of titanium or a titanium alloy, a method of fixing the mass body made of the dissimilar metal to a golf club head made of pure titanium or a titanium alloy includes a screwing method, a press-fitting method, etc. The method of fixing by the mechanical fastening means is common. For example, Japanese Patent Laid-Open No. 6-296716 discloses a hollow metal golf club head in which a weight is fixed on a sole for the purpose of lowering the center of gravity of the head. Yes. The weight fixing structure is:
A through hole of a female screw by a tap is formed in the weight, and a screw which is a screw is inserted from the through hole side formed in the sole, respectively, and is inserted into the through hole of the weight; There is disclosed one in which a pair of upper and lower nuts are screwed onto the tip of a screw made of pure titanium or titanium alloy, and the weight is fixed to the sole portion. Japanese Patent Application Laid-Open No. 11-137739 discloses a metal golf club head formed by welding a sole provided with a weight to a hollow head body.
A weight fitting recessed portion that opens upward on the inside of the sole is provided, and one or more protrusions are provided on the inner bottom surface of the weight fitting recessed portion, and the bottom surface of the weight member fitted in the weight fitting recessed portion A structure is disclosed in which the weight is fixed to the inner bottom surface of the sole by press-fitting the protrusion. [0006] However, the above-mentioned Japanese Patent Laid-Open No. Hei 6
In the golf club head having a hollow structure disclosed in Japanese Patent No. 296716, a screw and a nut are loosened due to an impact at the time of hitting the golf club head for a long period of time or vibration upon contact with the ground. There is a problem that the weight falls off, and there is a possibility that abnormal noise may occur at this time,
In particular, when it is desired to increase the area of the weight in order to effectively lower the center of gravity and increase the moment of inertia, such danger increases. In addition, there is a problem that it takes time to thread the weight and to assemble them. In addition, in the golf club head disclosed in Japanese Patent Application Laid-Open No. 11-137739, when press-fitting, a recessed portion having a high fitting accuracy with a weight body is processed in the head body, or the weight body is processed. However, there is a problem in that the recessed portion to be fitted must be formed in accordance with the size, which takes time, makes it difficult to process in a short time, and increases the processing cost. Furthermore, since a large internal stress is generated by press-fitting, there is a restriction on the part where the weight body is disposed, and
It was difficult to implement for materials with low strength. Accordingly, an object of the present invention is to solve the above problems and fix a mass body made of a material different from the metal material constituting the head body to the head body. It is an object of the present invention to provide a hollow golf club head that can be easily and firmly fixed. In order to achieve the above object, the present invention has the following configuration. A hollow golf club according to claim 1 of the present invention is a metal body that is made of a material different from a metal material constituting the head body, and is made of a metal material that can be welded to the sole part of the head body and the sole part. A hollow golf club head having a configuration in which the mass body is fixed to an inner surface of the sole portion by being sandwiched by a configured fixing member, and a protrusion is provided on the upper side of the mass body, Is formed with a through-hole through which the protrusion is inserted, and the projection inserted through the through-hole of the fixing member is plastically deformed to lock the mass body with the fixing member, and the fixing member is fixed to the sole A hollow golf club head characterized in that the mass body is fixed to the inner surface of the sole portion by welding and joining to the portion. DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below based on embodiments shown in the drawings. FIG. 1 is an overall perspective view showing a hollow golf club head 10 of the present invention.
FIG. 3 is a cross-sectional view of the hollow golf club head 10 of FIG. 1, illustrating a fixing structure of the mass body 20 fixed to the inner surface 5 a of the sole portion 5, and FIG. 3 fixing the mass body 20 to the sole portion 5. It is explanatory drawing which shows a method. In this embodiment, a wood type hollow golf club head 10 is shown as an example. As shown in FIG. 1, the hollow golf club head 10 includes a face portion 2 constituting a hitting surface, a crown portion 3 constituting an upper side, a side portion 4 constituting a peripheral side surface, and a sole portion 5 constituting a lower side. It has a structure in which a hosel portion 8 is formed on the heel 6 side. The hosel portion 8 forms a shaft connecting portion to which a shaft (not shown) is connected. The hollow golf club head 10 has a hollow interior, and one side in the left-right direction of the face portion 2 is referred to as a heel 6 and the other side is referred to as a toe 7. The face portion 2 includes a plurality of concave grooves. A score line 9 is formed. The hollow golf club head 10 is shown in FIG.
For example, a face member, a hosel member,
A member in which the crown part and the side part are integrated, and an outer shell member divided into four parts such as a sole part, a member in which the face part and the hosel part are integrally formed,
A plurality of divided members such as a member formed of an outer shell member divided into three parts, such as a member in which a crown part and a side part are integrated and a sole part, are formed by means such as forging or casting. The head main body 1 formed by fixing the members to each other by means such as welding, and the mass body 20 fixed to the inner surface 5a of the sole portion 5 of the head main body 1
It consists of and. The divided structure is not particularly limited, but may be any structure having at least two divided outer shells in order to dispose the mass body in the outer shell.
In the present invention, the material of the head body 1 is
It is formed using a known material such as titanium, a titanium alloy, and an aluminum alloy. The inner surface 5a of the sole portion 5 of the head main body 1 has a fixing member 23 made of a metal material that can be welded to the sole portion 5 to define the metal material constituting the head main body 1. In a state where the mass body 20 made of a different material is sandwiched, the fixing member 23 is connected to the sole portion 5.
The mass body 20 is fixed to the inner surface 5a of the sole portion 5 by welding. In the drawings,
Reference numeral 26 denotes a welded portion. The mass body 20 has a projection 21 formed on the upper side thereof, and a through hole 24 through which the projection 21 formed on the mass body 20 is inserted in the upper surface 25 of the fixing member 23.
Is formed. The mass body 20 is locked to the fixing member 23 by plastic deformation of the protrusion 21 inserted into the through hole 24 of the fixing member 23, and the periphery of the fixing member 23 is the The mass body 20 is bent so as to substantially cover it, and the bent end portion is fixed to the sole portion 5 by welding. The mass body 20 is suitably selected from, for example, tungsten, cobalt, copper, lead, iron, etc., and alloys thereof made of a material different from the metal material forming the head body 1. Further, the metal material forming the fixing member 23 may be any material that can be welded to the sole portion 5 constituting the head main body 1, and therefore does not need to be the same material and may be a different material. Furthermore, the shape of the fixing member 23 may be a shape that substantially covers the mass body 20. The position for fixing the mass body 20 is fixed at the center of the sole portion 5 of the head body 1 in this embodiment, but is not limited to the position shown in the drawings of this embodiment. The position where mass is to be added, for example, the back side of the sole portion 5 of the head body 1, the heel 6 side or the toe 7 side, can be arranged according to the characteristics designed for the head body 1, and the shape is also shown in the figure. In addition to the rectangular tube shape, a cylindrical shape or the like may be used, and an arbitrary shape can be set according to the above-described position. Next, the inner surface 5a of the sole portion 5 of the mass body 20 is shown.
A method of fixing to the head will be described. As shown in FIG. 3, a protrusion 21 is formed on the upper side of the mass body 20 having a set weight. Next, the fixing member 23 is bent into a shape that can substantially cover the mass body 20, and a through hole 24 for inserting the protrusion 21 is provided. And
The fixing member 23 is overlapped so that the projection 21 of the mass body 20 is inserted into the through hole 24 of the fixing member 23, and the tip portion 21a of the projection 21 of the mass body 20 is plastically deformed, whereby the projection 21 Is covered and locked in the vicinity of the through hole 24 of the fixing member 23. The fixing member 23 may be fixed in a state where an appropriate portion of the peripheral portion thereof is welded to the inner surface 5a of the sole portion 5 so that the mass body 20 is sandwiched with respect to the sole portion 5. it can. Thereafter, the sole portion 5
These members and other outer shell members are integrated through a welding process, and the hollow golf club head 10 is completed. Thus, by deforming the projection 21 of the mass body 20 plastically, the projection 21 is covered in the vicinity of the through hole 24 on the upper surface 25 of the fixing member 23, and the mass body 20 and the fixing member 23 are covered. Is locked, so that the mass body 20
The shape and size can be arbitrarily set according to the required weight. Further, the fixing member 23 and the sole portion 5 are welded to each other so that the mass body 20 is sandwiched with respect to the sole portion 5 and is firmly fixed. The mass body 20 can be firmly and easily fixed, and there is no fear that the mass body 20 will move or drop off due to the impact force applied to the hollow golf club head 10 by hitting the golf ball. In the present embodiment and drawings,
A protrusion 2 for locking the fixing member 23 on the mass body 20.
Although the case where two 1s are provided is shown, the present invention is not limited to this, and may be set according to the weight or shape of the mass body 20. In the present embodiment, the mass body 20 covers the fixing member 23 from above the mass body 20, and the projection 2
1, the fixing member 23 and the sole portion 5 are welded and joined. However, the fixing member 23 is covered from above the mass body 20, and the fixing member 23 and the sole portion 5 are welded. A method of plastically deforming the projections 21 of the mass body after joining may be used. In this embodiment, the case where the mass body 20 is fixed to the wood-type hollow golf club head 10 has been described. However, the present invention is not limited to this, and an iron-type head having a hollow portion is also used. Similarly, it can be adopted. As described above, according to the hollow golf club head of the present invention, the mass body made of a material different from the metal material constituting the head body is fixed to the head body. The mass body is roughly covered with a fixing member that can be welded to the head main body, and its tip is fixed by welding to the head main body, and the mass body and the fixing member are formed on the mass body. Since the projections thus formed are inserted into through holes formed in the fixing member and are plastically deformed, the types of the mass bodies such as a metal mass body different from the head body are used. Can be fixed firmly and easily regardless of size and shape, lowering the center of gravity of the head body, increasing the moment of inertia, and making other adjustments regarding the position of the center of gravity Can do.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view showing a hollow golf club head of the present invention. 2 is a cross-sectional view of the hollow golf club head of FIG. 1, illustrating a mass body fixing structure fixed to an inner surface of a sole portion. FIG. 3 is an explanatory view showing a method of fixing a mass body to a sole portion. [Description of Symbols] 1 Head body 2 Face portion 3 Crown portion 4 Side portion 5 Sole portion 5a Inner surface 6 Heel 7 Toe 8 Hosel portion 9 Score line 10 Hollow golf club head 20 Mass body 21 Projection 21a Tip portion 23 Fixing member 24 Through Hole 25 Upper surface 26 Welded part

Claims (1)

1. A mass body made of a material different from a metal material constituting the head body is made of a sole portion of the head body and a metal material capable of being welded to the sole portion. A hollow golf club head having a configuration in which the mass body is fixed to an inner surface of the sole portion by being sandwiched between the fixing members, and a protrusion is provided on the upper side of the mass body. A through hole through which the protrusion is inserted is formed, and the protrusion inserted through the through hole of the fixing member is plastically deformed to lock the mass body with the fixing member, and the fixing member is attached to the sole portion. A hollow golf club head, wherein the mass body is fixed to an inner surface of a sole portion by welding.