JPH0650676U - Golf club head - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] While maintaining the strength of the club head body,
A golf club head that can increase the degree of freedom in designing the center of gravity of the club head body. [Structure] Reference numeral 4 denotes an outer shell of the club head body 1. A concave portion 2 formed by a lost wax method or the like is formed on the face surface 1a side, and a concave portion 2 of the concave portion 2 has, for example, a lattice shape. The reinforcing beam member 5 is engraved and integrally formed so as to form the reinforcing beam member 5. The space portion 8 is filled with a lightweight material 6 made of a low specific gravity material, and an insert material 7 made of fiber reinforced plastic is integrally fitted and molded on the upper surface thereof. The material of the light-weight material 6 has a lower specific gravity than the material of the insert material 7 (fiber reinforced plastic), such as syntactic foam obtained by mixing epoxy resin and glass balloon, polyester, vinyl ester, peroxide, glass balloon. A material containing carbon fiber is used for the basic composition of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a golf club head, and more specifically, a club formed by attaching or inserting an insert material of a material different from the material of the club head main body to the face side of the iron golf club head. In the head, a reinforcing beam member is integrally provided on the bottom surface side of the recess formed in the club head body, so that it is possible to increase the degree of freedom in designing the center of gravity while maintaining the strength of the club head body. It is about the head.

[0002]

[Prior art]

 In the past, club heads of iron golf clubs were in violation of the rules of golf clubs by sticking or fitting different materials on the face surface of the club head body. , Such rules have been lifted. Therefore, in recent iron golf club heads, a recess 2 is formed on the face surface 1a side of the club head body 1 as shown in FIGS. 5 to 7, and the recess 2 is made of fiber reinforced plastic or low specific gravity material. It has been proposed that the insert material 3 to be formed is fitted or integrally formed by press molding or the like.

[0003]

[Problems to be solved by the device]

 In the case of molding the club head body 1 as described above, the lost wax method is generally used, a method of fitting a pre-molded insert material 3 into the concave portion 2, a method of sticking the insert material 3 using an adhesive, etc. However, when forming the concave portion 2 in the club head body 1 as described above, the back side of the club head body 1 needs to have a certain thickness from the viewpoint of strength, and the insert material 3 using fiber reinforced plastic is used. In this case, it is necessary to perform press molding, etc., so it is necessary to further increase the thickness of the bottom surface of the recess 2 and to reduce the center of gravity, reduce the thickness of the back surface. When the sole side is made thicker, the strength of the club head body 1 is reduced. Therefore, in the case of such a club head body 1, the total weight of the club head body 1 varies. Possible to lower the center of gravity from the scan there was a problem to say that difficult.

The present invention has been made in view of such conventional problems, and it is possible to increase 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 the head.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the gist of the present invention is that a reinforcing beam member is integrally provided on the bottom surface side of the recess formed on the face surface side of the club head body.

[0006]

[Action]

 This invention is configured as described above, and forms a recess of a predetermined size and a predetermined depth on the face side of the club head body, and, for example, a grid-like structure on the bottom side of the recess. By engraving and forming the reinforcing beam member integrally, it is possible to maintain the strength of the reinforcing beam member even if the back side of the club head body is thinned, and the engraved part By designing the weight to shift to the sole side, it is possible to design a club head body with a low center of gravity.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. The same components as those in the conventional example are designated by the same reference numerals and the 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 of FIG. FIG. 4 shows an outline of a club head body 1 mainly made of a metal material such as stainless steel, and a concave portion formed by a lost wax method or the like on the face surface 1a side of the club head body 1. 2 is formed, and on the bottom surface 2a side of the concave portion 2, for example, a grid-like reinforcing beam member 5 is carved so as to be 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 fiber reinforced plastic is integrally fitted on the upper surface thereof. It is molded. The material of the light-weight material 6 is a syntactic foam obtained by mixing epoxy resin and glass balloon, which has a lower specific gravity than the material (fiber reinforced plastic) of the insert material 7, polyester, vinyl ester, peroxide, glass. A material containing carbon fibers is used for the basic composition of the balloon.

FIG. 4 is a sectional view of the club head body 1 of the iron golf club showing the second embodiment of the present invention. In the case of the first embodiment, the insert material 7 is thin on the upper side. Although the lower side is made thicker, in the case of the second embodiment, the insert material 7a having a uniform thickness is used to suppress the shrinkage during the press molding of the fiber reinforced plastic. There is.

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 lost wax method is used to obtain a predetermined size on the face surface 1a side of the club head body 1. Further, the recesses 2 and the lattice-shaped reinforcing beam members 5 having a predetermined depth are formed, or after forming the recesses 2, the reinforcing beam members 5 are formed by engraving. The 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 of the lightweight material 6 to perform press molding. It is formed by pressurizing and heating by means of, to integrally form it, or by forming a plate-shaped insert material 7a in advance and pasting it with 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 the bottom surface side 2a of the concave portion 2 is, for example, a grid. The reinforcing beam member 5 can be formed by engraving so as to form the reinforcing beam member 5 integrally, and the strength can be maintained by the reinforcing beam member 5 even if the back side of the club head body 1 is thinned. In addition, it is possible to design a club head body with a low center of gravity by designing to transfer the weight of the engraved portion to the sole side. The shape of the reinforcing beam member 5 is not limited to the grid shape as described above, but may be formed in a cross shape, and is not particularly limited to the shape.

[0012]

[Effect of device]

 In this invention, since the reinforcing beam member is integrally provided on the bottom surface side of the concave portion formed on the face surface side of the club head body as described above, even if the back side of the club head body is thinned. The strength of the reinforcing beam member can be maintained, and the club head body with a low center of gravity can be easily designed by shifting the weight of the engraved part to the sole side. This has the effect of increasing the degree of freedom in designing the center of gravity such as height, height, toe and heel balance.

[Brief description of 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.

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.

6 is a cross-sectional view taken along the line CC of FIG.

7 is a cross-sectional view taken along the line DD of FIG.

[Explanation of symbols]

1 Club Head Main Body 1a Face Surface 2 Recess 2a Recess Bottom Bottom 4 Outer Shell 5 Reinforcing Beam Member 6 Lightweight Material 7 Insert Material 8 Space Section

Claims (1)

[Scope of utility model registration request] 1. A golf club head comprising a club head body having a recessed portion formed on the face surface side, and an insert member made of a resin material or a metal material fitted into the recessed portion. A golf club head having a beam member integrally provided.