JPH10248972A - Iron club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a beginner to hit a ball upward with easier contact thereof by arranging an iron head to comprise the body of a head having a hollow part and a face insert fitted into a recess part of the head body. SOLUTION: In an iron head 1, a face insert 4 is mounted on a face surface 3 of the body 2 of a head and a hollow part 5 is arranged inside the head body 2. In this case, a recess part 6 for mounting the face insert is formed in the face surface 3 of the head body 2 and has a bottom surface part 6a formed adjacent to the hollow part while a side part 6b of the recess part 6 is formed vertical. Moreover, an opening part is formed at the central part of the rear part of the head body 2 to let the hollow part communicate with outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an iron club head (hereinafter simply abbreviated as "iron head") comprising a head body having a hollow portion and a face insert fitted into a recess of the head body. is there.

[0002]

2. Description of the Related Art Conventionally, in golf play,
Various golf club heads have been invented for the purpose of accurately increasing the flight distance of a golf ball. Especially,
Also in the iron head, for example, an iron head called a cavity iron type has become mainstream in order to improve the flight distance of a golf ball like a wood club head. That is, as shown in FIG. 6, an iron head 11 in which the rear portion 16 of the head main body 12 has a concave shape in which the thickness of the central portion is thinner than that of the outer peripheral portion, and the specific gravity of the head main body 12 is provided in the concave portion 13 of the face surface. An iron head 11 in which a lightweight face insert 15 is fitted is also known. That is, by reducing the thickness of the light weight face insert 15 and the central portion of the head main body 12, the weight distribution of the head main body is mainly arranged on the outer peripheral portion, thereby increasing the sweet area and increasing the sweet area. The object of the present invention is to reduce the wall thickness so that the face portion is bent, and the resilience of the golf ball upon hitting the ball is improved.

As shown in FIG. 7, an opening 14 is provided in a recess 13 formed in the face of the head body 12.
An iron head 11 in which a face insert 15 made of a different material having a smaller specific gravity than the head body 12 is fitted is also known.

Further, as in an iron head 11 shown in FIG. 8 disclosed in JP-A-6-86842, a counterbore 18 is formed behind a face surface 12A of a head body 12, and a back surface 16 is formed on a back surface portion 16. It is also known that an opening 16A is formed to improve the controllability of the golf ball by acquiring torsional resistance when the golf ball is hit and transmitting momentum to the golf ball during a stroke with delay. is there.

[0005] In addition, recently, Japanese Patent Laid-Open No.
No. 1 discloses an iron head 11 shown in FIG. 9 and has a hollow portion 17 in a head main body 12 and a rear opening 16A for opening a central portion of a rear portion 16 of the head main body 12 to the outside. And the thickness of the face is set to 3 mm or less, and the face is
An iron head 11 made of a high-strength material having a bending strength of not less than / mm ² is also known.

[0006]

However, these conventional iron heads have the following problems. That is, in the former cavity-type iron head, the thickness of the central portion is smaller than the outer peripheral portion of the head main body, so that the iron head has a concave shape,
Certainly, the weight distribution to the periphery of the head body improves the sweet spot, but the depth of the center of gravity of the head body is shallower and closer to the face, so that when used by a beginner, the launch angle of the golf ball decreases. There was a strong tendency, and it was rather an iron head for intermediate and advanced players.

Next, in the latter cavity type iron head, an opening is provided in a concave portion formed in the face portion, and a face insert made of a different material having a specific gravity smaller than that of the head body is fitted and inserted. By forming the opening, the weight can be distributed further to the periphery of the head main body, so the sweet spot expands, but this iron head also tends to have a shallower center of gravity, so it is more suitable for beginners It was an iron head for advanced users.

Further, as in an iron head disclosed in Japanese Patent Application Laid-Open No. 6-86842, a counterbore portion is formed behind the face surface of the head body, and when a golf ball is hit, the face surface is twisted by a bending action. An iron head that controls a golf ball by obtaining resistance and transmitting momentum to a golf ball during a stroke with a delay transmits an effect if the head body and the face surface are integrally formed of the same material. However, when a face insert made of another material is fitted to the face surface, there is a possibility that a gap, peeling, crack, or the like due to repeated stress may occur on the fitting joint surface between the face insert and the head body.

Further, as disclosed in Japanese Patent Application Laid-Open No. 8-168541, a back opening having a hollow portion in the head body and opening a central portion of the back portion of the head body to the outside is formed. In addition, the thickness of the face surface is set to 3 mm or less, and in the iron head in which the face surface is formed of a high-strength material having a bending strength of 120 kgf / mm ² or more, the thickness of the face surface is set to 3 mm or less. Therefore, when the golf ball is hit, the face insert bends and the resilience to the golf ball improves, but when the face insert is fitted to the face surface, the face insert becomes too flexible and the face There is a possibility that a gap, peeling, cracking, or the like may occur in the fitting joint surface between the insert and the head body. Therefore, in the cavity type iron head, while improving the controllability and resilience characteristics of the golf ball, the weight is distributed to the periphery of the head body, the sweet area is expanded and the depth of the center of gravity is set further behind, for beginners, An intermediate or advanced golf player has desired an iron head that can easily lift a golf ball and that can improve the flight distance.

[0010]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. That is, a face insert is mounted on the face surface of the head body of the iron head, and in an iron head having a hollow portion inside the head body, the face surface of the head body includes:
A concave portion for mounting the face insert is formed, the concave portion has a bottom portion adjacent to the hollow portion, the side portion of the concave portion is formed in a vertical shape, and further, the central portion of the back portion of the head main body is formed. Is an iron head characterized in that an opening through which the hollow portion communicates with the outside is formed.
Further, a concave portion may be formed on the hollow portion side of the bottom surface portion of the concave portion for mounting the face insert of the head main body.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the invention according to claim 1 of the present invention, a separately formed face insert is mounted on the face surface of a head body of an iron head, and the inside of the head body is provided. In an iron head having a hollow portion, a concave portion for mounting a face insert is formed on the face surface of the head main body, and the concave portion has a bottom surface portion adjacent to the hollow portion, and a side surface portion of the concave portion has The iron head is characterized in that it is formed in a vertical shape, and further, an opening is formed in a central portion of a back portion of the head main body so that the hollow portion communicates with the outside. As described above, the concave portion for mounting the face insert is formed, and the concave portion has the bottom portion adjacent to the hollow portion, so that the face insert is formed from a material different from the head body and is used by fitting. However, the face insert can be held at the bottom surface portion even against repeated stress due to a hit ball, so that it is possible to prevent a gap, peeling, or crack from being generated at the fitting joint surface between the head body and the face insert. Further, when a concave portion is formed on the hollow portion side of the bottom portion of the concave portion for mounting the face insert of the head main body, the weight existing in the concave portion is arranged on the side surface portion and the peripheral portion of the head main body. Can be done.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 4, a face insert 4 is mounted on a face surface 3 of a head main body 2, and a hollow inside the head main body 2. In the iron head 1 having the portion 5, a recess 6 for mounting a face insert is formed on the face surface 3 of the head main body 2, and the recess 6 has a bottom surface 6 a adjacent to the hollow portion 5. Recess 6
Of the head body 2 is formed in a vertical shape.
An opening 7b through which the hollow portion 5 communicates with the outside is formed in a central portion 7a of the rear portion 7 of the iron head 1.

In the present invention, for example, the thickness of the face insert 4 mounted on the face surface 3 of the head main body 2 is set in the range of 1.5 to 3.0 mm, and the face insert 4 is formed on the face surface 3. The thickness of the bottom surface 6a of the recess 6 is set in the range of 0.8 to 2.5 mm (the optimal value is 2 to 2.
5 mm), and the thickness of the back surface 7 where the opening 7b of the head main body 2 is formed is set in the range of 1.5 to 3.0 mm (optimum value is 2 to 2.8 mm), and the center of the head main body 2 The interval between the soles in the hollow part of the hollow part is set in the range of 8 mm or less (optimum value is 5 to 7 mm), and the interval between the soles on the toe side of the hollow part is set in the range of 4 to 9 mm (optimal value is 5 to 8 mm).
It is something that can be done. Further, a recess 6d can be formed in the hollow portion side 6c of the bottom surface 6a of the recess 6 for mounting the face insert of the head body 2.

Further, one embodiment of the present invention will be described in detail. For example, the head body 2 is made of steel, alloy steel, stainless steel, or the like.
The head body 2 can be appropriately selected from metal materials such as carbon steel, copper, copper alloy, beryllium copper alloy, pure titanium, and titanium alloy. In addition, the head body 2 should be formed by a lost wax casting method or a forging method. Can be done. The face insert 4 is appropriately selected from metal materials such as amorphous alloy, steel, alloy steel, stainless steel, carbon steel, pure titanium, titanium alloy, aluminum, aluminum alloy, copper, copper alloy, and beryllium copper alloy. Can be combined. Preferably, as the head body,
It can be formed by a precision casting method using stainless steel SUS630 or the like.

Further, by selecting and combining different kinds of metal materials having a lower specific gravity than the head body 2 as the face insert, the weight distribution of the head body 2 is distributed to the peripheral portion of the head body 2. In addition to increasing the moment of inertia of the head itself and expanding the sweet spot, the central portion 7a of the back portion 7 of the head body 2 includes:
By forming the opening 7b through which the hollow portion 5 communicates with the outside, the depth of the center of gravity of the head 4 itself can be increased by arranging the weights present in the opening 7b on the back and peripheral portions of the head main body. Therefore, it is possible to provide a golf club in which even a beginner can easily hit a ball and hit easily. Furthermore, by using pure titanium or a titanium alloy for the face insert 4, since these materials are lightweight and have high specific strength, it is possible to hit the ball easily with good separation from the ball. It is possible to provide a golf club suitable for a golfer.

In the present invention, the face insert 4 is formed vertically on the side face 6b of the concave portion 6 formed in the face surface 3 of the head body 2, so that the boundary with the face insert 4 is vertically joined. The joint surfaces are beautifully continuous and are flush with each other, so that defects such as gaps and discontinuous wavy joint surfaces can be prevented.

In the present invention, the face insert 4 is formed on the face surface 3 of the head main body 2 by the recess 6.
As a method for bonding to the substrate, a method using an adhesive, a brazing method using silver brazing, or the like can be used.

[0018]

As described above, in the iron head of the present invention, the weight distribution of the head body is reduced by selecting and combining different kinds of metal materials having a lower specific gravity than the head body as the face insert. By being distributed to the peripheral portion, the moment of inertia of the head itself increases, the sweet spot expands, and an opening through which the hollow portion communicates with the outside is formed in the center portion of the back portion of the head body. By arranging the weight present in the opening on the back and peripheral portions of the head main body, the depth of the center of gravity of the iron head itself can be increased, so that even a beginner can easily hit a ball and provide a golf club that is easy to hit. is there.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of fitting of a head body and a face insert of an iron head according to the present invention.

FIG. 2 is a perspective view showing one embodiment of an iron head according to the present invention.

FIG. 3 is a cross-sectional view of a main part of the head main body of the iron head according to the present invention, showing a cross section of an AA section, a BB section, and a CC section of FIG. 2;

FIG. 4 is a perspective view showing the back side of the head body of the iron head according to the present invention.

FIG. 5 is a cross-sectional view of a main part showing a cross section of an AA section, a BB section, and a CC section of FIG. 2 showing another embodiment of the iron head according to the present invention.

FIG. 6 is an essential part cross-sectional view showing a conventionally known iron head.

FIG. 7 is an essential part cross-sectional view showing a conventionally known iron head.

FIG. 8 is an essential part cross-sectional view showing a conventionally known iron head.

FIG. 9 is a sectional view of a main part showing a conventionally known iron head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron head 2 Head main body 3 Face surface 4 Face insert 5 Hollow part 6 Concave part 6a Bottom part 6b Side part 6c Hollow part side 6d Concave part 7 Back part 7a Central part 7b Opening 11 Iron head 12 Head main body 12A Face 13 Depressed part 14 Opening Part 15 Face insert 16 Back part 16A Back opening 17 Hollow part 18 Counterbore part

Claims (2)

[Claims] An iron club head having a face insert mounted on a face surface and having a hollow portion inside a head body, a recess for mounting the face insert is formed on the face surface of the head body. A bottom portion adjacent to the hollow portion was formed, a side portion of the concave portion was formed in a vertical shape, and an opening through which the hollow portion communicated with the outside was formed in a central portion of the back portion of the head body. An iron club head, characterized in that: 2. The iron club head according to claim 1, wherein a concave portion is formed in a hollow portion of a bottom portion of the concave portion for mounting the face insert of the head body.