JP3280299B2 - Golf club head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head structure for enlarging a metal golf club head having a hollow portion, which is mainly made of metal.

[0002]

2. Description of the Related Art The greatest performance required of a golf club is an improvement in flight distance and stability of direction. Professionals always have one of the faces of a golf club head.
Since the ball can be hit at a point and the swing speed is fast, the hit ball has a great distance and a good directivity. However, since the hit points on the face portion of a general golfer are not stable, a flight distance is not obtained and the directionality is not stable.

[0003] The simplest solution to this problem is to increase the volume of the golf club head as much as possible. However, when the head is enlarged, especially in a metal wood golf club head which has recently become mainstream, the weight increases and the balance of the golf club as a whole deteriorates.

[0004] Therefore, a method of increasing the size of the head by reducing the thickness of the outer shell material constituting the head or reducing the material weight per unit area is generally adopted. In some models, high-strength materials are used to further reduce the thickness of the head. Further, as disclosed in Japanese Patent Application Laid-Open No. Hei 9-38248, a dimple-shaped recess is provided in the face member to claim that the strength is higher than that of a simple plate material. Which improve the toughness of the material by adjusting the temperature.

[0005]

However, if the thickness of the head is reduced as much as possible in consideration of only the impact at the time of hitting the ball, when the heads collide with each other in the caddy bag being transported, the thickness of the head is reduced. There is a possibility that the head is easily dented by the load applied to the portion. Therefore, the head may be dented by a slight impact other than the above. The use of a high-strength material has the disadvantage that the high-strength material itself is generally expensive and the usable materials are limited.

In the method of providing dimples as disclosed in Japanese Patent Application Laid-Open No. Hei 9-38248, the mechanism of strength improvement has not been clarified, and it is not clear whether a stable effect can be obtained. Also, around the dimple, it becomes thicker than simple plate material,
On the contrary, there is a disadvantage that the weight increases. Tokuhei 7-98
The method of making the crystal grain size fine as in 076 is considered to be an effective means against repeated load of impact because it improves the toughness of the material, but it does not improve the strength, so it can withstand load. There is no increase in sex. In view of the above problems, an object of the present invention is to provide, in a golf club head having a hollow portion, a head having an outer shell structure capable of reducing the thickness without impairing the strength.

[0007]

According to the first aspect of the present invention, a golf club head having a hollow portion has a PCCP structure.
The bottom of the triangle and the top and bottom of the trapezoid
By providing a PCCP structure so as to be parallel to the golf ball portion, the initial velocity of the hit ball is increased, the strength is increased, and a thin and large golf club head can be provided.

According to a second aspect of the present invention, in a golf club head having a hollow portion, the whole or a part except for the face portion is provided with a base of a triangle which is a component of the PCCP structure.
Set the upper and lower bases of the trapezoid so that they are parallel to the face.
A golf club head having a CCP structure.

According to a third aspect of the present invention, in a wood golf club head having a hollow portion, the head goes around the head in a direction parallel to the face portion from the crown portion to the sole portion through both side portions excluding the back portion. A golf club head having a continuous PCCP structure.

According to a fourth aspect of the present invention, in a wood golf club head having a hollow portion, a PCCP structure is continuously provided in a direction perpendicular to a face portion from a crown portion to a sole portion through a back portion. It is a golf club head characterized by the following.

According to a fifth aspect of the present invention, there is provided a golf club head having a hollow portion, wherein all or a part of the crown portion and the sole portion have a PCCP structure.

According to a sixth aspect of the present invention, in a wood golf club head having a hollow portion, only the crown portion is provided with a PC.
A golf club head having a CP structure.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The PCCP structure is a pseudo-cylindrical concave polyhedron.
It is an acronym for al Shell. The specific structure is as shown in FIG. 5, and the macroscopic shape is close to a cylindrical shape, but actually, a pair of triangles are arranged in a diamond shape (as shown in FIG. 5), or a pair of trapezoids is a hexagon. They are arranged in a mold (not shown).

FIGS. 6A to 6D are views showing a developed cylindrical shape having a PCCP structure. In this figure, a solid line excluding the outer peripheral line represents a “mountain line”, and a dotted line represents a “valley line”. PC whose components are triangles
In the CP structure, as shown in FIG. 6A or FIG. 6C, the bases 51 of the triangles arranged in a diamond shape are formed.
Is a valley line, and the hypotenuse 52 is a mountain line, thereby forming a cylindrical shape. In the PCCP structure in which the constituent elements are trapezoids, as shown in FIG. 6B or FIG. 6D, the lower bases 61 of the trapezoids arranged in a hexagon form a valley line,
The upper base 62 and the hypotenuse 63 form a mountain line to form a cylindrical shape.

This PCCP structure is formed from a simple triangle or trapezoid, and forms a curved surface having an arbitrary curvature by changing the length of each side as shown in FIG. 6 (a) or 6 (b). It is possible. Therefore, the present invention can be applied to a wood golf club head having a slightly distorted cylindrical shape and a hollow iron golf club head having a substantially semicircular back portion.

The cylindrical shape having such a PCCP structure is different from a cylindrical shape having a smooth curved surface having the same thickness.
It has the property of increasing rigidity and bending strength in the direction of the central axis of the cylinder. Therefore, without reducing the strength of the golf club head having the hollow portion in the center direction,
The thickness can be designed to be thin. This fact is proved by Table 1.

[0017]

[Table 1]

Table 1 shows that a cylindrical can having a diameter of 52 mm and a height of 104 mm was made of a conventional cylinder as in the past, and a PCCP.
It is the table which compared with the thing made with the structure. The cylindrical can having the PCCP structure used in this experiment has a shape as shown in FIG. 5 and is composed of an isosceles triangle of the same shape with a base of 14.85 mm and a hypotenuse of 10.5 mm. In both cases, when the yield point of compression in the circumferential direction (the point at which the load is applied in the circumferential direction and the cylinder begins to deform) is set to 5 kgf,
Table 1 shows that a wall thickness of 0.27 mm is required for an ordinary cylindrical can, whereas a wall made of the PCCP structure requires only 0.17 mm. As a result, the weight of the entire cylindrical shape becomes 35.3 g in the case of a normal cylindrical shape can, while it becomes 26.0 g in the case of the PCCP structure can, which is about 2
The weight can be reduced by 6%.

[0019]

FIG. 1 shows a wood golf club head 1 having a hollow portion, from a crown portion 11 (rear side in FIG. 1 and not shown), through both side portions 13 and 14 excluding a back portion 12, and through a sole portion. The PCCP structure 2 is continuously wound around the head in a direction parallel to the face portion 16 (the back side in FIG. 1 and not shown) leading to the portion 15.
It has been subjected to. The part with PCCP structure 2
As shown in Table 1 above, the thickness of any of the side portions and the sole portion excluding the crown portion and the back portion can be reduced as compared with the case where the PCCP structure is not provided. Therefore, the weight of the wood golf club head itself can be reduced if the volume is the same as the conventional one, and the head can be enlarged if the weight is the same.

Further, PCCP having a smaller thickness than the conventional PCCP
Even with the structure 2 part, the strength is the same as before,
Even if the heads collide with each other in the caddy bag being transported, the heads will not be dented by the load applied to the heads. Since the same material as that of the related art can be used to form the PCCP structure 2, there is no need to use an expensive high-strength material, and there is no increase in cost.

Further, the cylindrical shape having the PCCP structure is
As described above, the bending strength in the direction of the central axis of the cylindrical shape is increased, but in the PCCP structure in which the components are triangular, the continuation is in the direction perpendicular to the continuous base and in the PCCP structure in which the components are trapezoidal, The upper and lower bases are characterized in that the rigidity is reduced in a direction perpendicular to the bottom. Specifically, the PCCP structure can having a triangle as a component as shown in FIG. 5 used in the experiment of Table 1 will be described. The bottom 51 continuous in the circumferential direction is perpendicular to the can, ie, the height of the can. In addition, the rigidity is lowered. This can also be seen from the fact that in Table 1, the "frequency in the height direction" of the PCCP structure can is lower than that of a normal cylindrical can.

Accordingly, as shown in FIG. 1, the head makes a round around the head in a direction parallel to the face portion 16 from the crown portion 11 to the sole portion 15 through both side portions 13 and 14 excluding the back portion 12. When the PCCP structure is continuously applied to the face portion 16 and the base 51 of the triangle, which is a component of the PCCP structure, is also made parallel to the face portion 16, the direction from the face portion 16 (perpendicular thereto) to the back portion 12 (strike direction )
As a result, the initial velocity of the hit ball can be expected to be increased.

FIG. 2 shows a wood golf club head having a hollow portion, in which the PCCP structure 2 is continuously provided in a direction perpendicular to the face portion 16 from the crown portion 11 to the sole portion 15 via the back portion 12. Things. PC
Since the thickness of the crown portion 11, the back portion 12, and the sole portion 15 provided with the CP structure 2 can be reduced, the weight of the wood golf club head 1 itself can be reduced if the volume is the same as that of the related art. With the same weight, the head can be made larger. Further, since the strength is the same as that of the related art, even if the heads collide with each other, the heads are not dented.

Further, in FIG. 2, since the base 51 of the triangle, which is a component of the PCCP structure, is also made parallel to the face 16, the direction from the face 16 (perpendicular to the face) to the back 12 It can be expected that the rigidity in the (hitting direction) will be low and the initial speed of the hit ball will be increased.

In FIG. 3, the PCCP structure 2 is applied to almost the entire surface of the crown portion 11 and the sole portion 15 of the wood golf club head 1. In FIG. 4, a part of the crown portion 11 and the sole portion 15 of the wood golf club head 1 is provided with PCC.
P structure 2 is applied.

As described above, the wood golf club head 1
Even if the PCCP structure 2 is applied only to the crown portion 11 and the sole portion 15, the weight of the wood golf club head 1 can be sufficiently reduced because the ratio of the surface area of these portions to the entire wood golf club head 1 is large. . Moreover,
Since the crown portion 11 and the sole portion 15 do not draw a large curved surface unlike the back portion 12 and the side portions 13 and 14,
Wood golf club head with easy PCCP structure
1 also has the feature that it is easy to manufacture.

As shown in FIGS. 4A and 4B, the crown portion 1 of the wood golf club head 1 having a hollow portion is provided.
If the PCCP structure 2 is provided near the face portion 16 of the sole 1 and the sole portion 15, the weight of the head on the face portion 16 side can be made lighter than on the back portion 12 side. By doing so, the depth of the center of gravity is deepened (the center of gravity is closer to the back portion 12 side), so that the effect of expanding the sweet spot is also exerted.

Also, only the sole portion 15 in FIG. 3A, only the crown portion 11 in FIG. 3B, only the sole portion 15 in FIG. 4A, and only the crown portion 11 in FIG. Alternatively, the PCCP structure 2 can be applied.

As shown in FIGS. 3B and 4B, the crown portion 11 of the wood golf club head 1 having a hollow portion is provided.
When only the PCCP structure 2 is applied, the weight of the crown portion 11 is reduced. Therefore, if the sole portion 15 has the same structure as that of the related art, or if the weight is added to the sole portion 15 as much as the crown portion 11 is lightened, the wood golf club head 1 can have a low center of gravity, and the ball can be used. When hit, the ball lifts better.

Also in FIGS. 3 and 4, if the base 51 of the triangle, which is a component of the PCCP structure, is made to be parallel to the face 16, the face 16 (perpendicular to the face) and the back 12 The rigidity in the direction (hitting direction) is reduced (although it is not the same as in the embodiment of FIGS. 1 and 2), and it can be expected that the initial velocity of the hit ball is increased.

The position where the PCCP structure 2 is applied is not limited to the above example, and the position of the face portion 16 of the wood golf club head 1 is
Can be applied to any part other than. Regardless of where the PCCP structure 2 is applied, the thickness of that portion can be reduced, and the weight of the wood golf club head 1 can be reduced. Therefore, the weight can be adjusted by adjusting the range in which the PCCP structure is used, so that the degree of freedom in design is increased when the size of the head is increased. In addition, as described above, it is easy to adjust the depth of the center of gravity and the position of the center of gravity.

At this time, if the base of the triangle, which is a component of the PCCP structure, is set to be parallel to the face, the face 16 (perpendicular to the face) and the back 12
It can be expected that the rigidity in the direction (hitting direction) is reduced, and the initial speed of the hit ball is increased.

Further, by using the PCCP structure, a golf club having an interesting design can be provided.

As described above, in the embodiments shown in FIGS. 1 to 4,
Although the PCCP structure in which the components are triangular is described, the same effects can be obtained even in the case of the PCCP structure in which the components are trapezoidal. Further, although all the embodiments are directed to a wood golf club head, similar effects can be expected by applying the same to a portion other than the face portion of a hollow iron golf club head.

The head of the present invention can be manufactured by forging or casting. When a part of the golf club head has a PCCP structure, a PCC
Create only P structure by forging, casting or pressing, etc.
It can also be manufactured by bonding, welding, fitting or the like to a perforated head manufactured by a known method except for the portion to be provided with the CCP structure.

[0036]

The PCCP structure is applied to the PCCP structure.
The thickness of the hollow golf club head 1 can be reduced as compared with the case where no structure is provided. Therefore, if the volume is the same as the conventional one, the weight of the head itself can be reduced, and if the weight is the same, the head can be enlarged.

A PCCP having a thinner thickness than the conventional one
Even with the structure, since the strength is the same as that of the conventional case, even if the heads collide with each other in the caddy bag being transported, the heads are not dented by the load applied to the heads. Since the same material as that of the related art can be used for the PCCP structure, there is no need to use an expensive high-strength material, and there is no increase in cost.

If the upper and lower bases of a triangle or a trapezoid, which are components of the PCCP structure, are made parallel to the face, the direction from the face 16 (perpendicular to the face) to the back 12 ( It is expected that the initial velocity of the hit ball will increase as the rigidity in the hitting direction decreases.

The PCCP structure can be applied to any part except the face portion 16 of the golf club head. Even if the PCCP structure is applied to any position, the thickness of the part can be reduced. The weight of the golf club head can be reduced. In particular, the crown portion and the sole portion of the wood golf club head have a large surface area occupying the whole, and have a smaller curvature than the back portion and the side portions, so that they can be manufactured easily and have a large effect.

Further, since the weight can be adjusted by adjusting the range in which the PCCP structure is used, the degree of freedom in design is increased when the size of the head is increased. For example, a crown portion 11 and a sole portion 15 of a wood golf club head
If the PCCP structure is provided near the face portion 16, the weight of the head on the face portion 16 side can be made lighter than that on the back portion 12 side, so that the center of gravity can be deepened and the sweet spot can be widened. Crown part 11
If only the PCCP structure is applied, the weight of the crown portion 11 can be reduced and the center of gravity can be reduced, so that the ball can be lifted well when hit with the ball.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of a wood golf club head of the present invention having a PCCP structure.

FIG. 2 is a perspective view of another embodiment of the wood golf club head of the present invention having a PCCP structure.

FIG. 3 is a perspective view of another embodiment of the wood golf club head of the present invention having a PCCP structure.

FIG. 4 is a perspective view of another embodiment of the wood golf club head of the present invention having a PCCP structure.

FIG. 5 is a perspective view of a cylindrical shape having a PCCP structure.

FIG. 6 is a development view of a cylindrical shape having a PCCP structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wood golf club head 2 PCCP structure 11 Crown part 12 Back part 13 Side part 14 Side part 15 Sole part 16 Face part 51 Bottom side 52 hypotenuse 61 Lower bottom 62 Upper bottom 63 hypotenuse

────────────────────────────────────────────────── (5) References JP-A-54-100127 (JP, A) US Patent 5,700,208 (US, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) A63B 53 / 04

Claims (6)

(57) [Claims] 1. A golf club head having a hollow portion,
On the bottom of the triangle or trapezoid which is a component of PCCP structure
A golf club head , wherein a bottom and a bottom are provided with a PCCP structure so as to be parallel to the face portion . 2. A golf club head having a hollow portion, wherein the whole or a part except a face portion is made of PCCP.
Upper and lower bases of triangles and trapezoids that are structural components
A golf club head having a PCCP structure so as to be parallel to the face portion . 3. In a wood golf club head having a hollow portion, the head is continuously rotated around the head in a direction parallel to the face portion from the crown portion to the sole portion through both side portions excluding the back portion. A golf club head having a PCCP structure. 4. A golf club head having a hollow portion, wherein a PCCP structure is continuously provided in a direction perpendicular to a face portion from a crown portion to a sole portion through a back portion. head. 5. A golf club head having a hollow portion, wherein a PCCP structure is applied to all or a part of a crown portion and a sole portion. 6. A golf club head having a hollow portion, wherein a PCCP structure is applied only to a crown portion.