JP2003033453A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head with which a direction of hitting from right to left stabilizes, and with which a ball can rise easily. SOLUTION: This golf club head 1 has a head body 10 and a face plate 20 adhered to the head body 10. The head body 10 has a neck part 11, a face peripheral body 12 furnishing the face plate 20, a transverse rib 13 crossing this face peripheral body 12 transversely and a back bulge 14 projecting from the lower back of the face peripheral body 12. The face plate 20 is put on a recess part 15 of the face peripheral body 12, and a bolt 22 is screwed into a female screw hole 13b through a bolt inserting hole 21. It is preferable to weld a peripheral edge part of the face plate 20 and an internal circumference edge part of the face peripheral body 12 by a laser welding.

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 improvement of an iron type golf club head.

[0002]

2. Description of the Related Art As is well known, a conventional iron type golf club head has a face portion hitting a ball and a neck portion into which a shaft is inserted and fixedly formed integrally by casting or forging. Is.

In recent years, various iron type golf club heads have been developed in which different kinds of materials are combined such that the face plate is made of titanium alloy or copper alloy and the other part is made of stainless steel or the like. The applicant of the present invention also discloses in Japanese Unexamined Patent Publication
No. 85578 proposes an improved iron type golf club head having a similar structure.

In Japanese Patent Laid-Open No. 9-285578, a golf club head of a type in which a face plate is fixed to a frame-shaped head main body is provided in order to suppress vibration of the face plate at the time of hitting a ball and improve the feel at impact. The head main body is provided with vertical ribs that pass through the back of the face main body, and the face plate is fixed to the vertical ribs.

[0005]

Thus, by providing the vertical ribs and fixing the face plate to the vertical ribs, it is possible to suppress the vibration of the face plate at the time of a ball hit, but the vertical ribs can be suppressed. Therefore, the moment of inertia about the Y-axis (vertical axis) was small, and it was recognized that the hit ball tended to slightly shake left and right.

A first object of the present invention is to provide a golf club head which has an excellent feel and has little left / right blurring.

A second object of the present invention is to provide a golf club head which has a deep center of gravity and allows a beginner to obtain a large ball rising angle (so-called a ball can easily go up). .

[0008]

A golf club head according to the present invention comprises a head body integrally provided with a face outer peripheral body and a neck, and a face plate fitted and attached to the face outer peripheral body. In the golf club head according to the present invention, the head main body further integrally includes a lateral rib that laterally traverses the face outer peripheral body through a vicinity of a vertical center of the face outer peripheral body. It is characterized in that the face plate is fixed.

In such a golf club head, since a horizontal rib is provided on the head body and the face plate is fixed to the horizontal rib, vibration of the face plate at the time of a ball hit is suppressed, and a shot feeling is good. In addition, the provision of the lateral ribs increases the moment of inertia about the Y axis, and suppresses the left and right shake of the sphere.

In the present invention, it is preferable to provide a back bulge on the back surface of the head body. By doing so, the depth of the center of gravity of the golf club head becomes deep, and the ball is likely to rise.

The back bulge may be provided on almost the entire back surface of the head body (both above and below the lateral rib), but it is preferable to provide it only below the lateral rib. By doing so, the center of gravity of the golf club head is lowered, and the ball is more likely to rise.

[0012]

DETAILED DESCRIPTION OF THE INVENTION Embodiments will be described below with reference to the drawings. FIG. 1 is a perspective view of the golf club head according to the embodiment as seen from the back side, FIG. 2 is a perspective view of the golf club head as the embodiment is seen from the front side, and FIG.
(A) is an end view of a section cut along the line III-III in FIG.
FIG. 3B is a perspective view of this section, and FIG. 4 is an exploded perspective view of the golf club head according to this embodiment.

The golf club head 1 comprises a head body 10 and a face plate 20 fixed to the head body 10.

The head body 10 includes a neck portion 11 into which the shaft 2 is inserted and fixed by an adhesive agent, and a face outer peripheral body 12 to which a face plate 20 is attached.
Lateral ribs 13 that laterally traverse the face peripheral body 12
And a back bulge (hereinafter referred to as a back bulge) 14 that projects rearward from the lower portion of the face outer body 12.

The face peripheral body 12 is integrally connected to the neck portion 11 and extends to the toe side of the golf club head. The face outer peripheral body 12 constitutes an outer peripheral edge portion of the face portion of the golf club head. A concave step portion 15 for receiving the face plate 20 is provided on the face outer peripheral body 12 so as to surround the face portion. An inner peripheral rib portion 16 is provided on the inner side of the concave step portion 15.
Is similarly provided around the face portion.

The lateral rib 13 is provided so that its front end face is flush with the front end face of the inner peripheral rib portion 16. The lateral ribs 13 extend in the lateral direction (substantially horizontal direction when the golf club head is in the sole) near the middle of the face outer peripheral body 12 in the vertical direction. A boss portion 13a is provided in the middle of the lateral rib 13 in the longitudinal direction, and a female screw hole 13b is provided in the boss portion 13a. Horizontal rib 1
3 and the upper half of the face outer body 12 are open spaces 1
It is 7.

The back bulge 14 as the back bulge is
The lateral ribs 13 and the lower side portion 12b of the face outer peripheral body 12
And both side portions 12t on the lower half side of the face outer body 12,
12n (toe side portion 12t and neck side portion 1 in a region between the lateral rib 13 and the lower side portion of the face outer peripheral body 12)
2n). The back bulge 14 has a curved shape that bulges rearward from the lower half portion of the face outer peripheral body 12 and the lateral rib 13.

These neck portion 11 and face outer peripheral body 1
2, the lateral ribs 13 and the back bulge 14 are all integrally formed by casting and, if necessary, subjected to finishing such as heat treatment and polishing.

The face plate 20 is a plate-shaped member having a size that exists over almost the entire area of the ball hit surface (hit surface). A corrugation (groove) is provided on the front surface of the face plate 20. In addition, a bolt insertion hole 21 is provided at approximately the center of the front surface.

The face plate 20 is attached to the face outer peripheral body 1.
It is fitted in the concave step portion 15 of No. 2, and the bolt 22 is screwed into the female screw hole 13b through the bolt insertion hole 21. Further, it is preferable to weld the outer peripheral edge portion of the face plate 20 and the inner peripheral edge portion of the face outer peripheral body 12 by laser welding or the like. After the bolt 22 is screwed in, the head of the bolt is preferably ground so as to be flush with the face surface.

Welding may also be performed to join the lateral ribs 13 and the face plate 20 together. This welding is preferably performed by laser welding in order to prevent the face plate 20 from being deformed or cracked by welding heat.

In the embodiments of FIGS. 1 to 4, the back bulge 14 is provided so as to project rearward only from the lower side of the horizontal rib 13, but as shown in FIG. In both cases, a back bulge 14 'that projects to the rear of the head body 10' may be provided. The back bulge 14 'is provided with a front extending portion 14a extending from the middle in the vertical direction toward the front, and the lateral rib 13 (not shown in FIG. 5) and the lateral rib 13 at the front end of the front extending portion 14a. Boss part 1
3a is provided. The front extension 14a may have a rod shape or a plate shape,
In this embodiment, the front extension 14a is plate-shaped,
The inside of the back bulge 14 'is divided into two chambers, an upper chamber and a lower chamber, by the front extending portion 14a.

The other structure of the embodiment of FIG. 5 is the same as that of the embodiment of FIGS.

In the above-mentioned embodiment, the central portion of the face plate 20 is fastened to the lateral ribs 13 by the bolts 22, but the lateral ribs 13 are secured at two or more locations by bolts.
May be fastened to. Also, screws may be used instead of the bolts. Face plate 2 instead of bolts and screws
Alternatively, a pin-shaped projection may be provided so as to project from the back surface of the No. 0, and the projection may be forcibly fitted into the hole of the boss portion 13 to cause caulking deformation. As described above, welding with a laser or the like may be performed together.

The depth of the center of gravity of the face plate 20, Y
The inertia moment IY about the axis, the inertia moment IX about the X axis (horizontal axis), the height Hgr of the center of gravity, and the head weight were measured and are shown in Table 1.

A 37.5 inch (95.3 cm) long carbon shaft was attached to this golf club head,
Table 1 also shows the hit feeling evaluation when two professional golfers hit the ball.

[0027]

EXAMPLE 1 FIG. 6 shows a golf club head 1 having the structure shown in FIGS.
The dimensions a, c, g and θ shown in (A) and (B) were manufactured as follows. a = 79.0 c = 42.0 (however, the size of the position passing through the bolt 22) g = 60.0 θ = 26.5 °

Head body 10 and face plate 20
Was made of stainless steel (SUS630). Laser welding was performed on the entire circumference of the face plate 20 to the head body 10. After the bolt 22 was screwed in, it was ground to be flush with the face surface.

Example 2 A golf club head having the structure shown in FIG. 5 was manufactured in the same manner as in Example 1 except that the dimension h shown in FIG. 6C was 22 mm. Table 1 shows the characteristic measurement results and the trial shot results.

Comparative Examples 1 and 2 The same measurements and test shots were carried out on commercially available iron clubs, and the results are shown in Table 1.

The golf club head of Comparative Example 1 is a so-called cavity type golf club head having a recess on the back surface of the face surface. The golf club head of Comparative Example 2 is
A hollow golf club head with no ribs on the back of the face.

[0032]

[Table 1]

As is clear from Table 1, according to the present invention, the depth of the center of gravity can be increased, the moment of inertia about the Y axis can be increased, and a stable flight distance can be obtained in the left-right direction. In particular, the golf club head of Example 1 has a deep center of gravity and a low height of center of gravity (Hgr), which is preferable because the ball is likely to rise. Also, by providing a rib close to the back of the face, the feel of the test shot was improved compared to conventional golf club heads such as hollow irons and cavity irons, which is satisfactory for advanced golfers. It was

[0034]

As described above, according to the present invention, a golf club head having a stable left and right ball-hitting direction is provided. According to the present invention, it is also possible to adopt a configuration in which the sphere is easily raised.

[Brief description of drawings]

FIG. 1 is a rear perspective view of a golf club head according to an embodiment.

FIG. 2 is a front perspective view of the golf club head according to the embodiment.

3 (A) is an end view of a cross section cut along line III-III in FIG. 1, and FIG. 3 (B) is a perspective view of this cross section.

FIG. 4 is an exploded perspective view of the golf club head according to the embodiment.

5 is a vertical cross-sectional view of the same portion as FIG. 3A of a golf club head according to another embodiment.

FIG. 6 is a dimensional explanatory view of the golf club head of the embodiment.

[Explanation of symbols]

1,1 'golf club head 2 shafts 10,10 'head body 11 neck 12 face outer body 13 horizontal ribs 14,14 'Back bulge (back bulge) 15 concave step 16 Inner circumference rib 17 Space Department 20 face plate 22 volts

Claims (5)

[Claims] 1. A golf club head comprising a head main body integrally provided with a face outer peripheral body and a neck, and a face plate fitted and attached to the face outer peripheral body, wherein the head main body further comprises: A lateral rib that traverses the face peripheral body in the lateral direction passing through the vicinity of the vertical center of the face peripheral body is integrally provided, and the face plate is fixed to the horizontal rib. Golf club head. 2. The head body according to claim 1,
A golf club head characterized in that a back bulging body that bulges rearward from the face outer peripheral body and is continuous with the lateral rib is integrally provided, and the back bulging body is hollow. 3. The golf club head according to claim 2, wherein the back bulging member is provided only below the lateral rib. 4. The golf club head according to claim 2, wherein the back bulging member is provided on both the upper side and the lower side of the lateral rib. 5. The golf club according to claim 1, wherein the face plate is fixed to the lateral rib by at least one of bolt fastening, screw fastening, caulking and welding. Club head.