JPH1085372A - Golf club head - Google Patents

Abstract

[PROBLEMS] To easily determine whether or not a balance core 6 has been properly inserted into a concave portion 5 of a head main body 1 and, in addition to this, easily perform surface finishing. Provided is a golf club head that can be made and that the player does not feel uncomfortable. SOLUTION: A concave portion 5 is provided on a back surface 4 of a head main body 1,
A balance core 6 made of a material different from that of the head body 1 is inserted into the recess 5, and a cover 7 made of a material weldable to the head body 1 or the same material as the head body 1 is put on the balance core 6. The balance core 6 is wrapped by welding at the peripheral edge of the lid 7.

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 an iron club head.

[0002]

2. Description of the Related Art In order to increase the depth of the center of gravity and widen the sweet spot, a hollow metal iron,
A CFRP iron, a cavity iron, or the like has been developed. As shown in FIG.
A golf club head has been developed in which a balance weight 23 made of a material having a smaller specific gravity than the head body 21 is press-fitted (see Japanese Patent Application Laid-Open No. 8-38657).

However, the golf club head shown in FIG. 8 has a structure in which the balance weight 23 is press-fitted into the concave portion 22 of the head main body 21, and the balance weight 23 is exposed on the back surface of the head main body 21 even after the press-fitting. Therefore, there are the following disadvantages.

That is, first, since the assembly of the two is completed only by press-fitting the balance weight 23 into the concave portion 22 of the head main body 21, it is determined whether the balance weight 23 is properly press-fitted into the concave portion 22 or not. Unless it is checked intentionally later, it is not possible to grasp the improper press-fitting. If the balance weight 23 is not properly press-fitted, the function of the head is impaired due to the balance weight 23 being detached from the head body 21 during play, and it is extremely dangerous.

Second, while the material of the balance weight 23 is exclusively selected based on its specific gravity, the selected material is not always easy to be subjected to surface treatment such as plating. In addition, since the boundary between the head body 21 and the balance weight 23 is clearly visible, it is necessary to finish this boundary particularly finely. Therefore, it may be difficult to finish the surface, or it may take much time and effort to finish the surface.

Third, since the balance weight 23 is exposed on the back surface of the head body 21, the balance weight 23 is clearly visible to the player.
Therefore, depending on the material of the balance weight 23, the player who sees it may feel uncomfortable, and it may be difficult to use the head.

Fourth, since the balance weight 23 is a single component made of a single material, it is not possible to finely adjust the depth of the center of gravity or the height of the center of gravity of the head.

[0008]

SUMMARY OF THE INVENTION In view of the above, the present invention makes it possible to easily determine whether or not the balance core corresponding to the balance weight in the above-mentioned prior art has been properly inserted into the recess of the head body. It is an object to provide a golf club head.

In addition, it is another object of the present invention to provide a golf club head that can easily perform surface finishing and that is not easily felt by a player and is easy to handle.

It is another object of the present invention to provide a golf club head capable of finely adjusting the depth of the center of gravity and the height of the center of gravity during design and manufacture.

[0011]

In order to achieve the above object, a golf club head according to claim 1 of the present invention comprises:
A recess is provided on the back surface of the head body, a balance core made of a material different from that of the head body is inserted into the recess, and the balance core is covered with a lid made of a material that can be welded to the head body,
The head body and the lid are welded at a peripheral portion of the lid to enclose the balance core.

In a golf club head according to a second aspect of the present invention, a concave portion is provided on the back surface of the head body, and a balance core made of a material different from that of the head body is inserted into the concave portion. The head body and the lid are covered with a lid made of the same material, and the balance core is wrapped by welding the peripheral part of the lid.

According to a third aspect of the present invention, there is provided a golf club head having a laminated structure in which a concave portion is provided on the back surface of the head body, a balance core is inserted into the concave portion, and the balance core is made of different materials. I made it.

A golf club head according to a fourth aspect of the present invention is the golf club head according to the first or second aspect, wherein the balance core has a laminated structure in which different materials are stacked.

In the golf club head according to the first or second aspect of the present invention having the above structure, after the balance core is inserted into the concave portion provided on the back surface of the head body, the lid is further covered and welding is performed. Done. Therefore, if the balance core is not correctly inserted into the concave portion, the welding will not be performed accurately, so that it is possible to grasp that the balance core is not properly inserted without performing the checking work. it can.

In addition to the above, in the golf club head according to claim 2 of the present invention having the above structure,
Since the material of the lid is the same as that of the head main body, when the head main body and the lid are collectively subjected to the surface treatment by the same method, the surfaces of the both have the same finish. Therefore, since the boundary between the two is inconspicuous, it is not necessary to finish it particularly finely, and the appearance is not easily felt by the player.

Further, in the golf club head according to the third or fourth aspect of the present invention having the above structure, since the balance core has a laminated structure in which different materials are stacked, a plurality of types of materials having different specific gravities are used. By appropriately combining them, it is possible to finely adjust the depth of the center of gravity and the height of the center of gravity of the head.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the invention according to claim 1 or 2, the materials of the head body, the balance core and the lid are combined as follows, for example. First example: The head body and the lid are made of stainless steel or mild steel, and the balance core is made of titanium (also called titanium) or aluminum. Second example: The head body and the lid are made of titanium or aluminum, and the balance core is made of copper. Third example: The head body is made of mild steel, the balance core is made of titanium or aluminum, and the lid is made of copper.

The material of the balance core may be iron, nickel, lead, tungsten or alloys thereof in addition to the above.

Generally, as the specific gravity of the metal constituting the balance core is smaller than the specific gravity of the metal constituting the head body and the lid, the depth of the center of gravity becomes deeper, and the sweet spot becomes wider accordingly. At the same time, since the height of the center of gravity is reduced, the club is designed for beginners to easily hit the ball. On the other hand, if the specific gravity of the metal constituting the balance core is larger than the specific gravity of the metal constituting the head body and the lid, on the contrary, the depth of the center of gravity becomes shallow and the height of the center of gravity increases, so that the intermediate or advanced level The club is designed for golf clubs, but in actuality, there is a standard weight for each golf club in the design, so the outer dimensions of the head can be increased by the weight of the head body and lid, which are significantly reduced. Becomes So the result is:
The depth of the center of gravity will be set deeper than a normal iron club (soft iron or stainless steel).

In the invention according to claim 3 or 4, the balance core is laminated as follows, for example. First example: The balance core has a laminated structure of front and rear two layers on the face side and the opposite face side, the front layer is made of aluminum, and the rear layer is made of titanium. Second example: The balance core has a laminated structure of two layers,
The front layer is made of aluminum and the rear layer is made of titanium.

[0022]

Next, an embodiment of the present invention will be described with reference to the drawings.

First Embodiment As shown in FIGS. 1 to 3, a head body 1 integrally provided with a face 2 and a hosel 3 is moved from the upper end to the lower end so that the center of gravity is located downward. A concave portion 5 is formed on the back surface 4 of the head main body 1 which is gradually formed into a thick wall and is formed into a gentle concave curved surface. The bottom wall 5a of the recess 5 is substantially parallel to the face 2, and the peripheral wall 5b of the recess 5 is substantially perpendicular to the bottom wall 5a over the entire circumference. As a result of the head body 1 being formed gradually thicker from the upper end to the lower end thereof and the bottom wall 5a of the concave portion 5 being substantially parallel to the face 2, the concave portion 5 gradually increases its depth from the upper end to the lower end. Is increasing. The opening shape of the recess 5 is substantially similar to the head main body 1 as shown in FIG.

A balance core 6 is inserted into the recess 5,
Further, a cover 7 is put on the balance core 6, and the head body 1 and the cover 7 are welded around the entire periphery of the cover 7 by using a wire or the like to enclose the balance core 6. Code 8
Is a weld. Back surface 4 of head body 1 and surface 7 of lid 7
a is finished almost flush with the welded portion 8.

The lid 7 is a plate having a plane shape substantially the same as the opening shape of the concave portion 5, and is formed into a thin plate having a gentle concave curved surface such that its surface 7 a is substantially flush with the back surface 4 of the head body 1. ing. The thickness is substantially constant over the entire surface.

The balance core 6 is formed into a shape that fills the internal space of the concave portion 5 covered with the lid 7, and has a flat front surface 6a corresponding to the bottom wall 5a of the concave portion 5, and a front surface 6a.
And a concave rear surface 6 c corresponding to the back surface 7 b of the lid 7.

The head body 1 and the lid 7 are each formed of stainless steel, and the balance core 6 is formed of titanium.

The weight, the depth of the center of gravity, and the height of the center of gravity of the head having the above configuration are as follows. The comparative example is a solid product of the same shape of mild steel. Example: Weight of head main body 1 and lid 7 198 g Weight of balance core 6 46 g Depth of center of gravity 9.70 mm Height of center of gravity 18.80 mm Comparative example: Depth of center of gravity 9.50 mm Height of center of gravity 19.30 mm

Second Embodiment: Same as the first embodiment in shape, the head body 1 and the lid 7 are each made of stainless steel, and the balance core 6 is made of aluminum.

Third Embodiment: Same as the first embodiment in shape, the head body 1 and the lid 7 are each made of mild steel, and the balance core 6 is made of titanium.

Fourth embodiment: Same as the first embodiment in shape, the head body 1 and the lid 7 are each made of mild steel, and the balance core 6 is made of aluminum.

Fifth embodiment: The shape is the same as that of the first embodiment. The head body 1 and the lid 7 are made of titanium, respectively, and the balance core 6 is made of copper.

The weight, the depth of the center of gravity, and the height of the center of gravity of the head having this configuration are as follows. As described above, the comparative example is a solid product of the same shape of mild steel. Example: Weight of head body 1 and lid 7 114 g Weight of balance core 6 91 g Depth of center of gravity 9.10 mm Height of center of gravity 20.30 mm Comparative example: Depth of center of gravity 9.50 mm Height of center of gravity 19.30 mm

Sixth Embodiment: Same as the first embodiment in shape, the head body 1 and the lid 7 are each made of aluminum, and the balance core 6 is made of copper.

Seventh embodiment: Same as the first embodiment in shape, the head body 1 is made of mild steel,
Is made of titanium, and the lid 7 is made of copper.

The weight, the depth of the center of gravity, and the height of the center of gravity of the head having this configuration are as follows. As described above, the comparative example is a solid product of the same shape of mild steel. Example: Weight of head body 1 184 g Weight of lid 7 16 g Weight of balance core 6 46 g Depth of center of gravity 9.70 mm Height of center of gravity 18.80 mm Comparative example ... Depth of center of gravity 9.50 mm Center of gravity height 19.30 mm

Eighth embodiment: Same as the first embodiment in shape, the head body 1 is made of mild steel,
Is aluminum, and the lid 7 is copper.

Ninth Embodiment: Same as the first embodiment in terms of shape, except that, as shown in FIGS. 4 and 5, a balance core 6 is formed by laminating two layers on the face side and the opposite face side. The material is divided as the structure. That is, the head body 1
The lid 7 is made of stainless steel, the front layer 6A on the face side of the balance core 6 is made of aluminum, and the rear layer 6B on the opposite side of the balance core 6 is made of titanium.

The weight, the depth of the center of gravity, and the height of the center of gravity of the head having this configuration are as follows. As described above, the comparative example is a solid product of the same shape of mild steel. Example: Weight of head main body 1 and lid 7 198 g Weight of front layer 6A of balance core 6 14g Weight of rear layer 6B of balance core 6 23g Depth of center of gravity 9.90mm Height of center of gravity 18.80mm Comparative example ... Center of gravity depth 9.50mm Center of gravity height 19.30mm

Tenth embodiment: Same as the first embodiment in terms of shape, except that as shown in FIGS. 4 and 5, a balance core 6 is formed by laminating two layers on the face side and the opposite face side. The material is divided as the structure. That is, the head body 1 and the lid 7 are each made of mild steel, the front layer 6A on the face side of the balance core 6 is made of aluminum, and the rear layer 6B on the side opposite to the face of the balance core 6 is made of titanium.

Eleventh embodiment: The shape is the same as that of the first embodiment, except that the balance core 6 is made of a laminated structure of upper and lower two layers as shown in FIGS. That is, the head body 1 and the lid 7 are each made of stainless steel, the upper layer 6C of the balance core 6 is made of aluminum, and the lower layer 6D of the balance core 6 is made of titanium.

The weight, the depth of the center of gravity, and the height of the center of gravity of the head having this configuration are as follows. As described above, the comparative example is a solid product of the same shape of mild steel. Example: Weight of head body 1 and lid 7 198g Weight of upper layer 6C of balance core 6 9g Weight of lower layer 6D of balance core 6 31g Depth of center of gravity 9.70mm Height of center of gravity 18.60mm Comparative Example ... Depth of center of gravity 9.50mm height of center of gravity 19.30mm

Twelfth embodiment: The shape is the same as that of the first embodiment. However, as shown in FIGS. 6 and 7, the balance core 6 has a laminated structure of two layers, upper and lower, and the materials are divided. That is, the head body 1 and the lid 7 are each made of mild steel, the upper layer 6C of the balance core 6 is made of aluminum, and the lower layer 6D of the balance core 6 is made of titanium.

In the golf club head of each embodiment having the above-described structure, the depth of the center of gravity is further increased by the provision of the lid 7, and the concave portion provided on the back surface 4 of the head body 1 in the manufacturing process. After the balance core 6 is inserted into 5, the lid 7 is further covered and welding is performed. Therefore, if the balance core 6 is not correctly inserted into the recess 5, welding is not performed accurately due to a step in the welded portion 8 or the like. Therefore, even if the check operation is not performed, the balance core 6 can be inserted. We can grasp that there is deficiency. Therefore, whether or not the balance core 6 has been properly inserted into the recess 5 of the head main body 1 can be easily grasped.

Further, since the lid 7 is a thin plate having an actual size of about 1 to 3 mm, its press working is easy. Therefore, the thin lid 7 can be given a complicated shape that cannot be processed by a conventional solid head, or can be imprinted with a complicated shape pattern, logo mark, or the like.

In addition to this, in the golf club head of each embodiment except the seventh and eighth embodiments, since the material of the lid 7 is the same as that of the head body 1, the head body 1 and the lid 7 When both are subjected to the same surface treatment in the same manner, the surfaces of the first and the second have the same finish. Therefore, since the boundary between the two 1 and 7 is inconspicuous, it is not necessary to finish this particularly finely, and the appearance is not easily felt by the player. Therefore, it is possible to provide a golf club head in which the surface can be easily finished and the player does not feel uncomfortable and is easy to handle.

In addition, in the golf club heads of the ninth to twelfth embodiments, the balance core 6
Is a laminated structure in which different materials are stacked, by appropriately combining a plurality of types of materials having different specific gravities,
The depth of the center of gravity and the height of the center of gravity of the head can be finely adjusted. The number of layers may be three or more.

[0048]

The present invention has the following effects.

That is, according to the golf club head according to the first aspect of the present invention having the above-described structure, the depth of the center of gravity is further increased by the provision of the cover, and the golf club head is provided on the back surface of the head body in the manufacturing process. After the balance core is inserted into the recess, the lid is further covered and welding is performed. Therefore, if the balance core is not correctly inserted into the concave portion, welding will not be performed correctly due to a step in the welded portion, etc. Therefore, even if the check work is not performed, the balance core can be inserted. We can grasp that there is deficiency. Therefore, it can be easily grasped whether or not the balance core has been properly inserted into the recess of the head main body.

The lid is a thin plate, so that press working is easy. Therefore, it is possible to impart a complicated shape to this thin plate lid, which cannot be processed by a conventional solid head, or to imprint a complicated shape pattern, a logo mark, or the like.

In addition to this, according to the golf club head of the second aspect of the present invention having the above configuration, since the material of the lid is the same as that of the head main body, the head main body and the lid are collectively assembled. When the surfaces are treated in the same manner, both surfaces have the same finish. Therefore, since the boundary between the two is inconspicuous, it is not necessary to finish it particularly finely, and the appearance is not easily felt by the player. Therefore, it is possible to provide a golf club head in which the surface can be easily finished and the player does not feel uncomfortable and is easy to handle.

According to the golf club head according to the third or fourth aspect of the present invention having the above structure, since the balance core has a laminated structure in which different materials are stacked, a plurality of types of materials having different specific gravities are used. By appropriately combining them, it is possible to finely adjust the depth of the center of gravity and the height of the center of gravity of the head.

[Brief description of the drawings]

FIG. 1 is a front view of a golf club head according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is an exploded perspective view of the golf club head.

FIG. 4 is a front view of a golf club head according to a ninth embodiment of the present invention.

FIG. 5 is a sectional view taken along line BB in FIG. 4;

FIG. 6 is a front view of a golf club head according to an eleventh embodiment of the present invention.

FIG. 7 is a sectional view taken along line CC in FIG. 6;

FIG. 8 is a cross-sectional view of a golf club head according to a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 head main body 2 face 3 hosel 4 back face 5 concave part 5a bottom wall 5b peripheral wall 6 balance core 6a front face 6b peripheral face 6c rear face 6A front layer 6B rear layer 6C upper layer 6D lower layer 7 lid 7a surface 7b rear surface 8 welding portion

Claims (4)

[Claims] 1. A recess (5) is provided on a back surface (4) of a head body (1), and the head body (1) is provided in the recess (5).
A balance core (6) made of a material different from the above is inserted, and a cover (7) made of a material that can be welded to the head body (1) is put on the balance core (6), and the head body (1) and the cover (7) are covered. ) Is welded to the periphery of the lid (7) to enclose the balance core (6). 2. A recess (5) is provided in the back surface (4) of the head body (1), and the head body (1) is provided in the recess (5).
And a cover (7) of the same material as that of the head body (1) is put on the balance core (6), and the head body (1) and the cover (7) are Is welded to the periphery of the lid (7) to wrap the balance core (6). 3. A recess (5) is provided in the back surface (4) of the head body (1), a balance core (6) is inserted into the recess (5), and the balance core (6) is made of a different material. A golf club head having a laminated structure. 4. The golf club head according to claim 1, wherein the balance core has a laminated structure in which different materials are stacked.