JP2575793Y2 - Golf club head - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a golf club head, and more specifically, an insert material different from the material of the club head body is pasted or fitted on the face side of the iron golf club head. In a club head to be formed in an integrated manner, by providing a reinforcing beam member integrally on the bottom surface side of the concave portion formed in the club head body, it is possible to increase the degree of freedom of the center of gravity design while maintaining the strength of the club head body. The present invention relates to a golf club head that can be used.

[0002]

2. Description of the Related Art Conventionally, in golf clubs, it has been a violation of golf club rules to attach or fit different kinds of materials to the face surface of a club head body. With the amendment of this rule, such a rule was lifted. Therefore, in recent iron golf club heads, a concave portion 2 is provided on the face surface 1a side of the club head body 1 as shown in FIGS.
And an insert material 3 made of a fiber-reinforced plastic or a low-specific-gravity material is fitted into the recess 2 or integrally formed by press molding or the like.

[0003]

When the above-mentioned club head body 1 is molded, a lost wax method is generally used, and a method in which a preformed insert material 3 is fitted into the recess 2 or an adhesive is used. There is a method of attaching the insert material 3 and the like, but when the recess 2 is formed in the club head main body 1 as described above, the back side of the club head main body 1 requires a certain thickness from the strength aspect, In the case of the insert material 3 using a fiber reinforced plastic, since it is necessary to perform press molding or the like, it is necessary to further increase the thickness of the bottom side of the concave portion 2 and to reduce the center of gravity. When the thickness of the back side is reduced and the thickness of the sole side is increased, the strength of the club head body 1 is reduced. Thereby lower the center of gravity of the balance of the total weight of de body 1 there has been a problem that difficult.

The present invention has been devised in view of such a conventional problem, and a golf club head capable of increasing the degree of freedom in designing the center of gravity of the club head body while maintaining the strength of the club head body. It is intended for.

[0005]

According to the present invention, in order to achieve the above object , a concave portion is provided on the face side of a club head body.
Formed and made of resin material or metal material in this recess
Iron-type golf club with insert material fitted
In the love head, the back surface extends to the bottom surface of the concave portion.
And a plurality of spaces for reinforcement.
A beam member is integrally defined and formed, and
The gist of the present invention is that a lightweight material having a lower specific gravity than that of the heat-resistant material is filled .

[0006]

The present invention is constructed as described above, and forms a recess having a predetermined size and a predetermined depth on the face side of the club head body, and, for example, a lattice on the bottom side of the recess. Engraved beam-shaped reinforcing beams are integrally formed
Lightweight material is used in the space that defines the reinforcing beam members.
By filling, even if the thickness of the back side of the club head body is reduced, the strength can be maintained with the reinforcing beam member, and the weight of the carved part is designed to be shifted to the sole side, so that it is low. A club head body having a center of gravity can be designed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is a front view of a club head body 1 of an iron golf club showing a first embodiment of the present invention, and FIGS. 2 and 3 are sectional views taken along arrows AA and BB in FIG. Reference numeral 4 denotes an outer shell of the club head main body 1 mainly made of a metal material such as stainless steel, and a recess 2 formed by a lost wax method or the like is formed on the face surface 1a side of the club head main body 1. On the bottom surface 2a side of the concave portion 2, for example, a reinforcing beam member 5 in a lattice shape is engraved and integrally formed.

A space 8 between the reinforcing beam members 5 is filled with a lightweight material 6 made of a low specific gravity material, and an insert material 7 made of a fiber reinforced plastic is integrally fitted on the upper surface thereof. I have. The material of the lightweight material 6 has a specific gravity lower than that of the material of the insert material 7 (fiber reinforced plastic), a syntactic foam in which an epoxy resin and a glass balloon are mixed, polyester, vinyl ester, peroxide, glass balloon. The material containing carbon fiber is used for the basic formulation of.

FIG. 4 is a cross-sectional view of a club head body 1 of an iron golf club showing a second embodiment of the present invention. In the case of the first embodiment, an insert 7 is used.
The upper part is thinner and the lower part is thicker.
In the case of the embodiment, the shrinkage during press molding of the fiber reinforced plastic is suppressed to a small value by using an insert material 7a having a uniform thickness.

As a method of molding the club head body 1 as described above, a metal material such as stainless steel is used as a main material, and a predetermined size is formed on the face surface 1a side of the club head body 1 by a lost wax method. The recess 2 having a predetermined depth and the reinforcing beam member 5 having a lattice shape are formed,
Is formed, and the beam member 5 for reinforcement is formed by engraving.
A space 8 between the reinforcing beam members 5 is filled with a lightweight material 6 made of a material having a low specific gravity, and an insert material 7 made of a fiber-reinforced plastic is integrally fitted on the upper surface of the space member 8 and press-formed. Pressurizing and heating to form a single piece, or a plate-shaped insert material 7a is formed in advance, and then is attached by an adhesive.

As described above, the concave portion 2 having a predetermined size and a predetermined depth is formed on the face surface 1a side of the club head main body 1, and, for example, a lattice-shaped portion is formed on the bottom surface 2a of the concave portion 2. Engraving the beam members 5 for reinforcement
And the space 8 defining the reinforcing beam member 5 is lightweight.
By filling the material 6 , the strength can be maintained by the reinforcing beam member 5 even if the thickness of the back side of the club head body 1 is reduced, and the weight of the carved portion is shifted to the sole side. in which it is possible to design the club head body of the low center of gravity by designing. In particular, the reinforcing beam member 5
Lightweight material 6 having a lower specific gravity than insert material 7
By filling, an insulator forming the face surface 1a is formed.
The club head body 1 without impairing the properties of the
Weight reduction and reinforcement can be performed simultaneously. Note that the shape of the reinforcing beam member 5 is not limited to the lattice shape as described above, and may be formed in a bar shape, and is not particularly limited to a shape.

[0012]

According to the present invention, a reinforcing beam member is integrally provided on the bottom surface side of the concave portion formed on the face side of the club head body as described above, and the reinforcing beam member is defined .
The lightweight space is filled with lightweight material, so even if the thickness of the back side of the club head body is reduced, the strength can be maintained with the reinforcing beam member, and the weight of the carved part is shifted to the sole side By designing as described above, the club head body having a low center of gravity can be easily designed, and the effect of increasing the degree of freedom in designing the center of gravity such as the depth, height, toe / heel balance of the club head body can be increased. is there.

[Brief description of the drawings]

FIG. 1 is a front view of an iron golf club head embodying the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional view of a club head body of an iron golf club showing a second embodiment of the present invention.

FIG. 5 is a front view of a conventional iron golf club head.

FIG. 6 is a sectional view taken along the line CC of FIG. 3;

FIG. 7 is a sectional view taken along the line DD in FIG. 3;

[Explanation of symbols]

Reference Signs List 1 club head main body 1a face surface 2 concave portion 2a concave bottom surface 4 outer shell 5 reinforcing beam member 6 lightweight material 7 insert material 8 space portion

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) A63B 53/04

Claims (1)

(57) [Scope of request for utility model registration] 1. An iron formed by forming a recess (2) on the face side of a club head body (1 ) and fitting an insert (7) made of a resin material or a metal material into the recess (2). In the golf club head of the type, a plurality of spaces extending rearward on the bottom surface of the concave portion (2).
(8) is provided, and the reinforcing beam member (5) is integrally formed by the space (8), and the reinforcing member (5) is formed in the space (8).
Lightweight material (6) having a lower specific gravity than the insert material (7)
A golf club head characterized by being filled with .