JP3367897B2 - Golf club head - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a golf club head.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 9 and 10, a sole opening portion of a head body 10 is welded and fixed to a head body 10 and a sole member 12 of a metal golf club head.
11, the sole member 12 is held by the surface 13 (in the shape of a letter)
The protrusion 14 was provided.

[0003]

However, in the conventional golf club head as shown in FIGS. 9 and 10, the protrusions
14 hindered the penetration of the weld material 16.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a golf club head having protrusions that do not hinder the penetration of the welding material and allow sufficient penetration during welding.

[0005]

In order to solve the above-mentioned object, a golf club head according to the present invention has a head main body having an opening at least partially and a plate member closing the opening by welding. In a fixed hollow shell-shaped head, the inner peripheral edge of the opening of the head main body is
From the extended portion toward the center of the opening and the tip of the extended portion
Holds the back side of the plate member by bending the end outward.
It is provided with a cross-section substantially L-shaped projection 4 consisting of a charge unit for.

Further , at least a protrusion is separated from the opening.
It is provided in two places. In addition, the projections should be placed all around the opening.
It is provided.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below in detail with reference to the drawings showing the embodiments.

1 to 4 show a first embodiment of the present invention. This golf club head has a metal head body 1 (including FRM) and a metal plate member 2 (including FRM). Consists of. The head body 1 has a hollow shell shape, and the plate member 2 constitutes a sole wall surface.

The head main body 1 has an opening 3 at the bottom surface on the sole side, and four projections 4 having an L-shaped cross section are provided in the opening 3 in a protruding manner. The projections 4 are formed by extending an extending portion 5 extending from the inner peripheral edge of the opening 3 of the head body 1 toward the center of the opening, and the tip of the extending portion 5 outward (downward in FIG. 3). And a receiving portion 6 that receives the back surface of the plate member 2.

The outer peripheral edge of the plate member 2 has substantially the same shape as the inner peripheral edge of the opening 3 of the head body 1, and is fitted into the opening 3 and fixed by welding. At this time, the back surface of the outer peripheral portion of the plate member 2 is received by the receiving portion 6 of the protrusion 4. In addition, in the first embodiment, the protrusions 4 are separately arranged into two or more pieces. However, in the case of disposing a plurality of (separated) in a separated shape as shown in FIG. 4, three or more (particularly four or more) should be provided so that the plate member 2 can be stably placed in good balance before welding. Is desirable.

FIG. 5 shows a second embodiment of the present invention, in which the protrusion 4 is provided (continuously) over the "entire circumference" of the opening 3. In this way, the balance when the plate member 2 is placed is better than that when the projections 4 are scattered in the openings 3, and welding is performed appropriately. In addition, in the present invention, the "entire circumference" is defined to include the case of substantially the entire circumference (when there is a break in a part).

FIG. 6 shows a third embodiment of the present invention, in which four projections 4 are separately formed in the opening 3 of the head body 1.
Are provided, and the extending portions 5 ... Of the respective projections 4 are connected to each other by a joint portion 19. That is, the YY cross section of FIG. 6 has a gap H between the joint portion 19 and the plate member 2 as shown in FIG. Further, the ZZ cross section of FIG. 6 is, as shown in FIG. 7B, the cross section of the first embodiment (FIG. 3).
It has the same shape as.

By the way, FIG. 8 shows a welding state (a penetration state of a welding material). Welding is performed from the front surface 7 side of the plate material, and (a) represents a state in which welding is appropriately performed, depending on how much the welding material 8 melts into the back surface 9 side.
(B) shows a state where welding is not properly performed, and (C) shows a state where welding is not properly performed.

In the conventional golf club head, as shown in FIG.
As shown in FIG. 10 and FIG. 10, when welding the head body 10 and the sole member 12, the welding material 16 does not penetrate to the back surface 15 side of the sole member 12, but the welding strength was insufficient. In the golf club head of the present invention, when the head body 1 and the plate member 2 are welded, the welding material 17 penetrates to the back surface 18 of the plate member 2 as shown in FIGS.
The welding condition is good and the welding strength is high.

The present invention is not limited to the illustrated embodiment, and the design can be freely changed. For example, the opening 3 of the head body 1 is not limited to the sole surface side, but can be arranged on the face surface side or the crown portion side. However, the plate member 2 may be a face plate piece or a crown closing plate piece correspondingly. It is also possible to form a plurality of openings in one club head.

In the present invention, the term "hollow shell" means that no member exists in the hollow chamber,
For example, it is defined as including the case where the foamed resin, the vibration-proof material, and the weight balance material are filled or partially internally contained. In addition, in the present invention, the “substantially L-shaped cross section” is defined to include a rounded J-shape, a quarter-arc shape, and the like in addition to the angular shape as shown in the figure.

[0017]

EXAMPLE A golf club head having four conventional projections 14 shown in FIGS. 9 and 10 in a sole opening 11 and a projection 4 according to the present invention shown in FIGS. Using the golf club heads provided at four locations, the penetration level of the welding material at the welding site between the head body and the plate (sole) member was compared. The shape of the head body other than the protrusions 4 and 14 and the shape and material of the plate (sole) members 2 and 12 are exactly the same. Also, considering the variation of work, each 10
Each piece was manufactured and the welded portion was cut and evaluated. That is, the state of (a) of FIG. 8 is set to be appropriate (◯), the state of (b) is not so appropriate (Δ), and the state of (c) is set to be inappropriate (x).

The welding conditions are shown below. A manual TIG welder (capacity: 200 V-60 A) was used as the welding machine, and 6Al-4V of φ2.0 was used as the welding material. The crater current at the initial stage of welding was set to 10 A and the Ar gas flow rate was set to 12 L / min. The evaluation results are shown in Table 1.

[0019]

[Table 1]

From Table 1 above, it can be seen that the welded portion of the golf club head of the present invention is obviously more suitable for welding.

[0021]

Since the present invention is configured as described above, it has the following effects.

When welding the head body 1 and the plate member 2 (according to claim 1), the welding material 17 is applied to the plate member 2.
It can be fully melted up to the back side 18 side. Furthermore
In addition, the shape of the protrusion 4 is simple and easy to manufacture, and the plate part
The strength for holding the material 2 can also be increased. When the head body 1 and the plate member 2 are welded (according to claim 2), the position of the plate member 2 is stable without rattling, so that welding is easy.

When the head body 1 and the plate member 2 are welded (according to claim 3), the position of the plate member 2 is further stabilized, so that the welding can be performed more easily. In addition, since welding is performed over the entire circumference under the same conditions, uniform penetration over the entire circumference can be more reliably obtained .

[Brief description of drawings]

FIG. 1 is an overall plan view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged view of part A of FIG.

FIG. 4 is a bottom view of the head body.

FIG. 5 is a bottom view of the head main body showing the second embodiment.

FIG. 6 is a bottom view of the head main body showing the third embodiment.

7 is a sectional view taken along the line YY and a sectional view taken along the line ZZ in FIG. 6;

FIG. 8 is an explanatory view showing a welded state.

FIG. 9 is a sectional view showing a conventional golf club head.

FIG. 10 is an enlarged view of part B in FIG. 9.

[Explanation of symbols]

1 head body 2 plate members 3 openings 4 protrusions 5 Stretching part 6 Receiving department 18 back side

Claims (3)

(57) [Claims] 1. A hollow shell head in which a head body 1 having an opening at least in part and a plate member 2 closing the opening 3 are fixed by welding.
The inner peripheral edge of the opening 3 of the, from the inner peripheral edge to the center of the opening
The extending portion 5 extending toward the outside and the tip of the extending portion 5 are bent outward.
Receiving for bending and receiving the back surface 18 of the plate member 2
A golf club head, characterized in that it is provided with a protrusion 4 having a substantially L-shaped cross section, which is composed of a portion 6 . 2. The golf club head according to claim 1, wherein the projection 3 is provided in the opening 3 at least at two separate positions. 3. The golf club head according to claim 1, wherein the projections 4 are provided on the entire circumference of the opening 3.