JP2655553B2 - Golf club head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head, and more particularly to an improvement of a so-called cavity-back type iron-based golf club head having a concave back face.

[0002]

2. Description of the Related Art FIG.
4And figure5The shaft 1 is inserted and fixed as shown in FIG.
The hosel 2 has an impact surface 3
Back face 4, heelDepartment5, towDepartment6, soleDepartment
7, Top part 12And are formed integrally. Backfeel
The middle 4 is formed in the base 4 and the heel is formed.Department5 and to
CDepartment6, the thickness of the impact surface 3 is reduced,
The moment of inertia is increased. In this conventional example,
41 is an upper rib 8, a lower rib 9, a heel rib 10,
It is surrounded by the rib 11 on the c side. Also, the upper rib 8
Without the upper and lower ribs 8 and 9
That is, the back face 4 may have a recess 41 formed therein.
is there.

[0003]

In a conventional so-called cavity-back type head, the club head material, which should be in the region of the middle recess 41, is distributed to the heel portion 5 and the toe portion 6, and the golf ball is laterally offset. Reduces head rotation at impact. To reduce the rotation of the head, that is, to increase the moment of inertia,
It is effective to add weight to the heel portion 5 and the toe portion 6, but the weight of the club head is limited by itself, and it cannot be unnecessarily heavy, so that the thickness of the impact surface 3 is reduced. It was inevitable. For this reason, even when the ball was hit at the sweet spot 30 on the impact surface 3, a good hit feeling could not be obtained due to the small thickness. A traditional so-called muscle bar that does not have a hollow 41
With a club type club head, the hit feeling was good, but the rotation of the head could not be reduced when the sweet spot was removed.

[0004] Accordingly, the present invention provides a cavity backer.
With both the goodness of the Ip and the muscle back type,
Ie the moment of inertia is large and an object of the present invention is to provide a feel also a good golf club head.

[0005]

In order to achieve the above object, the present invention has a top portion and a sole portion in a vertical direction, a toe portion and a heel portion in a longitudinal direction, and an impact surface and a back face in a longitudinal direction. Then, the thickness of the impact surface is reduced by providing a middle recess on the back face,
A golf club head in which a rib connected to a top portion , a toe portion , a sole portion and a heel portion is formed, and each of the portions has an increased moment of inertia made of metal having a specific gravity of 7.0 to 9.0. The specific gravity of the entire recess is in the range of 1.5 to 5.0, and a metal back portion selected from titanium, a titanium alloy, aluminum, an aluminum alloy, and a magnesium alloy is press-fitted.

[0006]

According to the present invention, a muscle back type golf club head is provided without impairing the magnitude of the moment of inertia which is an advantage of a so-called cavity back type golf club head.
A good feel, which is an advantage of the head , can be obtained.
Than the material on the back of the sweet spot is used in the toe portion and the heel portion by providing the middle recessed portion a back portion made of a low specific gravity material, to increase the moment of inertia by distributing the weight in the toe and heel, back The hit feeling can be improved by the presence of the part.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

The embodiment shown in FIGS. 1 and 2 has a hosel 2 through which a shaft 1 is inserted and fixed as in the prior art. This hosel 2 has an impact surface 3, a back face 4, a heel portion 5, a toe portion 6 , The sole part 7 and the top part 12 are formed integrally. The back face 4 is formed with a middle recess 41, and the heel portion 5 and the toe portion 6 are formed to be thick. In this manner, the back face 4 is formed into the middle recess 41, the thickness of the impact surface 3 is reduced, and the middle recess 4 is formed.
An upper side or top part side rib 8, which continues as a peripheral wall of 1;
Toe rib 11, lower or sole rib 9, and rib
The main body portion 20 is formed by forming a rib portion side rib 10 and increasing the thickness to increase the moment of inertia. Pressure back portion 21 made of a material having low specific gravity than the material used in the heel portion 5 and the toe portion 6 throughout the middle recess 41 of the main body portion 20
It is inserted and buried . As a material forming the main body portion 20, a material such as soft iron, stainless steel, beryllium kappa, or the like is preferable. As the back portion 21, a material having a lower specific gravity than the material used for the main body portion 20, for example, the main body portion 2 is used.
0 is made of soft iron, stainless steel or beryllium kappa, titanium, titanium alloy , aluminum
, An aluminum alloy or a magnesium alloy is preferred. When the main body 20 is made of soft iron or stainless steel, the material of the back portion 21 is preferably titanium or aluminum. The specific gravity of the material forming the main body 20 is 7.
Is 0 to 9.0, the material specific gravity 1.0 to be used in the back part 21 5. 0 .

When the back portion 21 is buried in the entire middle recess 41, the back portion 21 is formed separately from the main body portion 20.
(Forging or casting is common), and the back part 21 is press-fitted into the middle recess 41 of the main body part 20.

In another embodiment shown in FIG. 3 , only the member constituting the impact surface 3 of the main body 20 is formed of another material, that is, a titanium alloy, and is pressed into other parts of the main body 20. constitute the so-called composite type, pressure back portion 21 in the recess 41 in which is formed on the rear surface of the impact surface 3
Shows the input and examples. The material forming the main body 20 other than the impact surface 3 is a metal material having a specific gravity of 7.0 to 9.0, such as stainless steel or beryllium copper.
The material can be used suitably.

[0011]

As described above, according to the present invention, a head made of a metal having a high specific gravity of 7.0 to 9.0 is used.
By providing a hollow in the back face of the main body,
Surround the middle dent while reducing the thickness of the impact surface
Reconnecting with top, toe, sole, and heel
The golf club head having the
The specific gravity is in the range of 1.5 to 5.0 over the entire middle recess of the face
And titanium, titanium alloy, aluminum, aluminum
Aluminum alloy, and Rukin selected from magnesium alloy
The surrounding wall surrounding the middle dent because the back part of the genus was press-fitted
State in which stress acts in the direction to expand the entire rib
The back portion is arranged in the middle recess. So
Large inertia in a hollow head with a hollow
Medium dent on back of club head while retaining moment
Ball with a so-called muscle back type that does not have
A solid feel at the time is obtained. Also, the impact surface
Formed from titanium alloy, and beyond the impact surface of the head body
Each outer part is made of a metal having a specific gravity of 7.0 to 9.0.
In this case, the strength of the impact surface is improved,
Weight is distributed to the periphery by reducing the weight of the
To increase the suite area and lower the center of gravity
And solid as described above.
A hit feeling is obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a preferred embodiment of the present invention .

[2] A-A line sectional view of FIG.

FIG. 3 is a partially broken perspective view showing another embodiment.

FIG. 4 is a view showing a conventional example viewed from a back face side.

FIG. 5 is a central longitudinal sectional view of FIG. 4 ;

[Explanation of symbols]

Reference Signs List 3 Impact surface 4 Back face 5 Heel part 6 Toe part 7 Sole part 8-11 Rib 12 Top part 20 Body part 21 Back part 41 Middle dent

Claims (2)

(57) [Claims] 1. A top part, a sole part and a longitudinal part in a vertical direction.
Toe and heel in the direction, impact surface and
And back face, respectively, with a concave in the back face
To reduce the thickness of the impact surface,
Rib connected to top, toe, sole and heel
Each of the above parts is formed of gold having a specific gravity of 7.0 to 9.0.
Golf club head with enhanced moment of inertia
In the above, the specific gravity is 1.5-5.
0, and titanium, titanium alloy, aluminum
From aluminum, aluminum and magnesium alloys
Gol characterized by press-fitted back metal part
Fukrab head. 2. A top part, a sole part, and a longitudinal direction in a vertical direction.
Toe and heel in the direction, impact surface and
And back face, respectively, with a concave in the back face
The impact surface is thinned by providing
Form ribs that connect to the toe, toe, sole, and heel
And the impact surface is made of titanium alloy
Then, the specific gravity of each part other than the impact surface is 7.0 to 9.0.
Golf club with increased moment of inertia made of metal
In the The specific gravity is 1.5-5.
0, and titanium, titanium alloy, aluminum
From aluminum, aluminum and magnesium alloys
Gol characterized by press-fitted back metal part
Fukrab head.