JPH10179815A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head with a light-weight hitting part giving no damage in the feeling of hitting as well as being excellent in durability by forming a columnar protrusion on the back side of a hitting member, and filling a metal filler whose specific gravity is smaller than that of the hitting member in a space inside a wall part. SOLUTION: This head comprises a metal-made hitting member 1, and a wall part 2 being formed intergrally with the member 1 and extending in the direction of a rear surface while surrounding the circumference together with the member 1. A plurality of columnar protrusions 3 are formed on the rear side of the member 1, and a metal filler whose specific gravity is smaller than that of the member 1 is filled in a space inside the wall part 2 so that it substantially comes to the height of the protrusions 3. Numerals 5 denotes hosel, 6 top, and 7 sole. Accordingly, the thickness of the member 1 is made thin, the weight is reduced, while the volume of head can be increased. As a result, a sweet area is increased, and also with the filler 4 the feeling of hitting is enhanced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a golf club head.

[0002]

2. Description of the Related Art In the case of iron clubs, in the case of iron clubs, soft iron and stainless steel are mainly used as the material to be used, and the thickness from the toe to the heel is almost uniform. For the purpose, a so-called cavity back type, in which the central area of the back surface of the member forming the hitting surface is thinned and the portion is distributed to the periphery of the back of the hitting surface, is preferably used. Naturally, the thickness reduction of the cavity-back type hitting member is restricted in terms of strength, and also affects the hitting feeling caused by vibration and damping at the time of impact. 5 mm is the limit.

On the other hand, wood clubs, especially driver's heads, have shifted from wood, typically represented by persimmon, to metal such as stainless steel or titanium, and more recently, for the same reasons as the iron clubs described above. Large heads with hollow and thin walls are used favorably.
However, also in this case, the wall thickness of the hitting surface that requires the most strength is
The limit is 3.5 mm for stainless steel and 3.0 mm for titanium.

[0004]

Incidentally, there has been proposed a structure in which a plurality of reinforcing ribs are provided on the back surface of a hitting member for the purpose of maintaining strength by further reducing the thickness. However, in this case, too, the expected weight reduction cannot be obtained or, for example, when a large number of fine ribs are provided in parallel with each other, the stress due to the ball impact concentrates on the thin portion between the ribs, resulting in early fracture. And other problems.

The present invention has been made in view of the above problems, and has as its object to provide a golf club head having a lightweight hitting portion which is excellent in durability and does not impair the feel at impact.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a golf club head having a metal hitting member and a wall extending in a rearward direction surrounding the hitting member integrally with the hitting member. A pillar-shaped projection protruding from the back side of the hitting member is formed, and a metal filler having a specific gravity smaller than that of the hitting member is filled in a space in the wall.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in FIG.
FIG. 3 shows an iron type golf club head, which has a metal hitting member 1 and a wall portion 2 surrounding the hitting member 1 and extending in a rearward direction integrally therewith; The columnar projections 3 are formed, and a metal filler 4 having a specific gravity smaller than that of the hitting member 1 is filled in a space in the wall portion 2 to almost the height of the columnar projections 3. In the figure, reference numeral 5 denotes a hosel, reference numeral 6 denotes a top, and reference numeral 7 denotes a sole. The hitting member 1, the wall portion 2, the columnar projections 3 and the hosel 5 are integrally formed of the same metal material, for example, stainless steel.

FIG. 2 shows the back of the head, where reference numeral 8 indicates a toe and reference numeral 9 indicates a heel. The columnar projections 3 are provided at substantially equal intervals in a plurality of steps (three steps) in the direction from the sole 7 to the top 6 and are provided at substantially equal intervals in a plurality of rows (six rows) in the direction of the heel 9 from the toe 8 side. In addition, as long as the purpose is not impaired, for example, one thick columnar projection 3
Book can be provided. In this embodiment, the diameter of all the projections is 2 mm. In the embodiment shown in FIGS. 1 and 2, the shape of the columnar projections 3 is cylindrical, but may be elliptic or polygonal. The diameter of the columnar projection 3 is 1.0
The range is preferably from 2.0 to 5.0 mm, more preferably from 2.0 to 5.0 mm. The columnar projections 3 have the same thickness from the root to the tip, but may have a thicker root and a thinner tip. Further, the columnar projections 3
Is perpendicular to the hitting member 1, but the columnar projections 3 may be projected so as to extend in the horizontal direction when the club is solely set at the loft angle. The arrangement of the plurality of columnar projections 3 is not limited to the illustrated embodiment, and the plurality of columnar projections 3 provided in a portion corresponding to the sweet area in the hitting member 1 are densely provided, and in the peripheral area outside the sweet area. It is also possible to arrange relatively coarsely, or vice versa, or even a multiple circular arrangement. In addition, the arrangement of the columnar projections 3 may be such that the columnar projections 3 that are thicker than the other columnar projections 3 can be provided in the sweet area.

As the metal filler 4, aluminum is preferable. Metal filler 4 is aluminum (specific gravity 2.7)
In this case, the ball striking member 1 may be a combination of copper (specific gravity 8.93), iron, particularly cast iron (specific gravity 7.64), stainless steel (specific gravity 7.8), titanium (specific gravity 4.5), and the like. Although the metal filler 4 is filled to the same level as the height of the columnar projections 3 in the illustrated embodiment, the metal filler 4 may be filled to a level slightly lower or slightly higher than the height of the columnar projections 3.

In the embodiment shown in FIGS. 1 and 2, the thickness of the ball striking member 1 is 1 mm, and the thickness gradually increases from the position of the top 6 having the smallest thickness in the direction of the flight line to the position of the thickest sole 7. According to the thickness of the edge, the top 6 of the columnar projection 3
The height of the sole 7 is low, and the height of the sole 7 is high. Therefore, the thickness of the metal filler 4 also increases from the top 6 toward the sole 7. When the back shape of the filled metal filler 4 is viewed in a cross section as shown in FIG. 1, it is formed linearly from the position of the top 6 to the position of the sole 7, or formed into a curved surface depressed in the direction of the hitting member 1. Alternatively, on the contrary, it may be formed in a curved surface shape rising to the rear side. The metal filler 4 is filled and fixed in a space in the wall 2 using a suitable binder. After filling the metal filler 4, the surface is polished. In addition,
In particular, in the case of an iron club head, the height of the columnar projections 3 is limited to, for example, about １ ／ of the height of the wall 2 or the depth of the depression at each position, and the metal filler 4 is It is also possible to fill the entire height.

FIG. 3 shows an example in which the present invention is applied to a wood type golf club head.
mm, and the height of the columnar projections 3 is 2 mm.
The metal filler 4 is filled to the same level as the height of the metal filler. In this wood type golf club head as well, the columnar projections 3 can be densely arranged in the sweet area, or the columnar projections 3 in the sweet area are made higher, and the metal filler 4 is filled to a level corresponding to the height. May be. In addition, as long as the purpose is not impaired, the filling of the columnar projections 3 at a level higher than or lower than the level may be performed. Further, the thickness of the columnar projection 3 can be changed depending on the location.

[0012]

As described above, according to the present invention, there is provided a metal ball striking member and a wall extending in the rear direction so as to surround the ball striking member integrally therewith. A plurality of protruding columnar projections are formed, and the metal filler having a specific gravity smaller than that of the ball striking member is filled in the space in the wall almost to the height of the columnar protrusion, so that the thickness of the ball striking member can be reduced, resulting in a lighter weight As a result, the head volume can be increased. Increasing the head volume also increases the sweet area. Further, since the metal filler is filled on the back side of the hitting member, the hit feeling is also improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of an iron type golf club head.

FIG. 2 is a rear view of the embodiment of FIG. 1;

FIG. 3 is a cross-sectional view of a wood type golf club head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ball hitting member 2 Wall part 3 Columnar protrusion 4 Metal filler

Claims (5)

[Claims] 1. A golf club head having a metal ball striking member and a wall extending in a rear direction surrounding the ball striking member integrally with the ball striking member, wherein a columnar projection protruding from the back side of the ball striking member is formed. A golf club head characterized in that a metal filler having a specific gravity smaller than that of a hitting member is filled in a void in the wall. 2. The method according to claim 1, wherein the columnar projection has a diameter of 1.0 to 20.0 mm.
2. The golf club head according to claim 1, wherein the golf club head comprises a pillar. 3. The golf club head according to claim 1, wherein the plurality of pillar-shaped projections project from the sole side of the golf club head in a plurality of steps in a top direction and a plurality of rows project from the toe side of the head in a heel direction at substantially equal intervals. 3. The golf club head according to 2. 4. The golf club head according to claim 1, wherein the metal filler is filled to a height substantially equal to that of the columnar projection. 5. The golf club head according to claim 1, wherein the hitting member and the metal filler are made of stainless steel and aluminum, respectively.