JP2002320691A - Structure of wood golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood golf club head of which a location of center of gravity is set without using a metal weight, and is easily adjusted. SOLUTION: A structure of the wood golf club head comprises a face 41 of the wood head 40 which is symmetrical with respect to both its sides as well as up and down. An upper face 42 with symmetrical side including the upper side and a bottom side 43 including a lower side are symmetrical with regard to the upper side. A side part 44 including right and left side of the face part is located between the upper side part and bottom side part with symmetrical side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club wood head structure. In particular, the present invention relates to a golf club wood head structure in which the position of the center of gravity can be easily arranged at the face center and the position of the center of gravity can be easily adjusted.

[0002]

2. Description of the Related Art FIG. 13 is a front view showing a conventional wood head structure for a golf club. As shown in FIG. 1, a conventional wood head 30 for a golf club has a face portion 31 for impacting a golf ball and a hosel portion 32 for inserting a shaft into the wood head 30.

[0003] The shape of the wood head 30 with respect to the golf club as viewed from the front of the face portion 31 is such that the lower portion is substantially flat, the upper portion has a convex curve, and is vertically asymmetrical. From the shape alone, the position of the center of gravity of the wood head 30 is above the face portion 31. For this reason, in the manufacture of the wood head 30, lead, which is heavier than the main body of the wood head 30, and a metal weight such as tungsten are distributed to the sole portion, or the thickness of the main body is increased by lowering the thickness. By lowering the center of gravity of the wood head 30, it is set near the center of the face portion 31.

FIG. 14 is a plan view of the wood head 30 relating to the golf club shown in FIG. As shown in this figure, the shape of the wood head 30 with respect to the golf club is bilaterally asymmetric on a plane viewed from above due to the hosel portion 32. For this reason, in the manufacture of the wood head 30, the center of gravity of the wood head 30 is not shifted left and right from the center of the face portion 31 due to the left-right asymmetry.
The weight distribution of the metal is adjusted.

In the manufacture of the wood head 30, the distance of the center of gravity from the face portion 31 to the rear of the wood head 30, that is, the depth of the center of gravity, is adjusted. The advantage obtained by arranging the center of gravity of the wood head 30 at the center of the face portion 31 is that the golf ball is
In the case of impact on the surface 1, the energy loss is to be minimized, and the repulsive force is also increased.

That is, a golf club wood head 30 that gives the maximum energy to the golf ball and extends the flight distance is obtained.

[0007]

[Problems to be solved by the invention] However,
When the wood head 30 of the golf club is manufactured, a metal weight or the like must be distributed to the wood head 30 in order to bring the center of gravity of the wood head 30 to the center of the face portion 31, so that the manufacturing becomes complicated. Further, there is a first problem that the manufacturing cost is increased.

Further, the swing of the golf club has individuality and habit, and the player tends to hit the golf ball on the upper side of the face portion 31, the player tends to hit on the lower side, and the toe side in the condition of the day. Some players tend to hit on the heel side, while others tend to hit on the heel side.
In such a case, a metal weight is attached to the wood head 30 and the position of the center of gravity is moved.

[0009] However, it is necessary to have experience to find out how much the metal weight is attached and which position is the optimum position, and it is difficult to easily determine the optimum position of the center of gravity. Therefore, in view of the above problems, it is an object of the present invention to provide a golf club wood head structure that can determine the position of the center of gravity without using a metal weight and can easily adjust the position of the center of gravity.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a golf club wood head structure in which a face portion of a wood head having a symmetrical and vertically symmetrical surface and a symmetrical surface are provided. An upper surface portion including an upper side of the face portion, a bottom surface portion having a symmetrical surface and including a lower side of the face portion in a vertically symmetric manner with the upper surface portion, and an intermediate portion between the upper surface portion and the bottom surface portion A wood head structure for a golf club, comprising: a symmetrical surface; and a side surface portion including left and right sides of the face portion.

[0011] By this means, the position of the center of gravity can be determined without using a metal weight, so that the manufacturing is simplified and the manufacturing cost can be reduced. Preferably, a left-right symmetric groove is provided in the side surface portion, and more preferably, the upper surface portion,
A vertically symmetrical groove is provided at the center in the left-right direction of the bottom part,
More preferably, a left-right symmetrical groove is provided on the side surface portion, and a vertically symmetrical groove is provided at a central portion in the left-right direction of the upper surface portion and the bottom surface portion.

By this means, the position of the center of gravity can be easily adjusted according to the suitability of the golfer. Preferably, various wood heads are formed by changing the degree of bending of the surface of the upper surface portion and the bottom surface portion. By this means, wood heads of various sizes having a center of gravity at the center of the face portion can be manufactured, and wood heads having face portions of various lofts can be manufactured.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an appearance of a wood head of a golf club according to the present invention. As shown in this figure, the wood head 40 of the golf club
For example, it is composed of wood and titanium materials, and includes a face portion 41 that impacts a golf ball, an upper surface portion 42 that forms a curved surface including an upper side and a lower side of the face portion 41, a bottom surface portion 43, and left and right sides of the face 41. , A side surface portion 44 located between the upper surface portion 42 and the bottom surface portion 43, and a hosel portion 45 inserted into a shaft is provided on the upper surface portion 42. The position and angle of the hosel part 45 are set visually and structurally optimally.

Face part 41, top part 42, bottom part 4
3. The side surfaces 44 are vertically symmetric and left-right symmetric as follows. FIG. 2 is a plan view of the wood head 40 in FIG. As shown in the figure, the shape of the plane of the upper surface portion 43 as viewed from above is a circular shape with a portion cut away, and is symmetrical left and right.

Similarly, the shape of the plane of the bottom surface portion 44 as viewed from below (not shown) is also a circular shape with a portion cut away except for the top surface portion 43 and the hosel portion 45.
FIG. 3 is a side view of the wood head 40 in FIG. 1 as viewed from the right side. As shown in the figure, the wood head 40 viewed from the right side is configured so that the upper surface portion 42 and the bottom surface portion 43 are vertically symmetrical with respect to the side surface portion 44. Similarly, the wood head 40 viewed from the left side also has an upper surface portion 42 and a bottom surface portion 43 that are vertically symmetrical with respect to a side surface portion 44 (not shown). The side surface portion 44 is symmetrical.

FIG. 4 is a rear view of the wood head 40 in FIG. 1 as viewed from the rear. As shown in the figure, even when the wood head 40 is viewed from the rear, the top part 42, the bottom part 43,
Each of the side portions 44 is vertically symmetrical and symmetrical. Therefore, according to the present invention, the wood head 40 is formed symmetrically in the vertical and horizontal directions, so that the center of gravity of the wood head 40 is located at the center of the face portion 41.

Since the wood head 40 can be easily manufactured in such a shape, the manufacturing cost can be greatly reduced. By changing the degree of curvature of the curved surface of the wood head 40, the size of the wood head 40 can be variously changed, and further, the loft angle of the face portion 41 can be variously changed.

Further, the wood head 40 is formed with a rounded curved surface, but may be formed with a surface including straight lines and steps. FIG. 5 is a modified example of FIG. 1 and is a perspective view showing the appearance of a wood head 40 capable of adjusting the position of the center of gravity in the left-right direction and the depth direction. As shown in FIG.
Is provided with a groove 51, and the groove 51 is used for attaching a metal weight for adjusting the position of the center of gravity.

FIG. 6 is a side view of the wood head 40 in FIG. 5 as viewed from the right, and FIG. 7 is a back view of the wood head 40 in FIG. 5 as viewed from the back. As shown in FIG. 6, the side surface portion 44 of the wood head 40 viewed from the right side includes
Similarly, the side portion 44 of the wood head 40 viewed from the left side
Further, as shown in FIG. 7, a groove 51 is provided in the side surface portion 44 of the wood head 40 viewed from the rear. Groove 51
, The horizontal symmetry and the vertical symmetry of the wood head 40 are maintained.

Therefore, according to the present invention, the side portion 44
By attaching a metal weight to the groove 51, the position of the center of gravity can be easily adjusted in the left-right direction and the depth direction. In this manner, depending on the golfer's suitability, the weight and light weight adjustments permitted by the rules, including changes in the center of gravity distance (depth) from the face portion 41,
The center of gravity can be moved left and right from the center.

FIG. 8 is a modified example of FIG. 1, and is a perspective view showing the appearance of a wood head 40 in which the position of the center of gravity can be adjusted in the vertical direction and the depth direction. As shown in the figure, a groove 52 is provided on the upper surface portion 42 and a groove 52 (not shown) is provided on the bottom surface portion 43, and the groove 52 is used for attaching a metal weight for adjusting the position of the center of gravity.

FIG. 9 is a plan view of the wood head 40 of FIG. 8 as viewed from above, and FIG. 10 is a rear view of the wood head 40 of FIG. 8 as viewed from the back. As shown in FIG. 9, at the center in the left-right direction of the upper surface portion 42 viewed from above,
Similarly, at the center in the left-right direction of the bottom surface portion 43 viewed from below,
Further, as shown in FIG. 10, grooves 52 are provided in the upper surface portion 42 and the bottom surface portion 43 of the wood head 40 viewed from the rear. Even if the groove 52 is provided, the wood head 40 is left-right symmetric,
Vertical symmetry is maintained.

Therefore, according to the present invention, the upper surface 4
2. By attaching a metal weight to the groove 52 of the bottom portion 43, the position of the center of gravity can be easily adjusted in the vertical direction and the depth direction. In this way, depending on each golfer's suitability, the weight and light weight adjustments permitted by the rules, the change in the center of gravity distance (depth) from the face portion 41, and the movement of the center of gravity up and down from the center are performed. Becomes possible.

FIG. 11 is a modification of FIG. 1, and is a perspective view showing the appearance of a wood head 40 in which the position of the center of gravity can be adjusted in the horizontal direction, the vertical direction, and the depth direction. FIG. FIG. 5 is a rear view of the device viewed from the rear. As shown in FIGS. 11 and 12, a groove 51 is formed in the side surface portion 44, and a groove 52 (not shown) is formed in the left and right center of the upper surface portion 42 and the bottom surface portion 43.
The grooves 51 and 52 are used for attaching a metal weight for adjusting the position of the center of gravity.

Even if the grooves 51 and 52 are provided, the left and right symmetry and the up and down symmetry of the wood head 40 are maintained. Therefore,
According to the present invention, the position of the center of gravity is easily adjusted in the left-right direction, the up-down direction, and the depth direction by attaching a metal weight to the groove 51 on the side surface portion 44, the groove 52 on the top surface portion 42, and the groove 52 on the bottom surface portion 43. It becomes possible.

In this manner, depending on each golfer's suitability, the weight (light weight adjustment) permitted by the rules, as well as the center of gravity distance (depth) from the face portion 41
, The center of gravity left and right from the center, and the center of gravity up and down from the vertical center can be performed.

[0027]

As described above, according to the present invention,
A face portion of a wood head having left-right symmetrical and vertically symmetrical surfaces, an upper surface portion having a left-right symmetrical surface and including the upper side of the face portion, and a lower side portion of the face portion having a left-right symmetrical surface and being vertically symmetrical with the upper surface portion. , And a side part that is located between the top part and the bottom part and that has a symmetrical surface and that includes the left and right sides of the face part. The position can be determined, manufacturing can be simplified, and manufacturing costs can be reduced.

Furthermore, since a symmetrical groove is provided on the side surface and a vertically symmetrical groove is provided at the center in the left-right direction of the top surface and the bottom surface, the position of the center of gravity can be adjusted according to the suitability of the golfer. Easy to do. In addition, since various wood heads are formed by changing the degree of bending of the top and bottom surfaces, it is possible to manufacture wood heads of various sizes having a center of gravity at the center of the face portion, Wood heads having various loft face portions can be manufactured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an appearance of a wood head of a golf club according to the present invention.

FIG. 2 is a plan view of a wood head 40 in FIG.

FIG. 3 is a side view of the wood head 40 in FIG. 1 as viewed from the right side.

FIG. 4 is a rear view of the wood head 40 in FIG. 1 as viewed from the rear.

FIG. 5 is a modified example of FIG. 1, and is a perspective view showing the appearance of a wood head 40 capable of adjusting the position of the center of gravity in the left-right direction and the depth direction.

FIG. 6 is a side view of the wood head 40 in FIG. 5 as viewed from the right side.

7 is a rear view of the wood head 40 in FIG. 5 as viewed from the rear.

FIG. 8 is a modified example of FIG. 1, and is a perspective view showing an appearance of a wood head 40 in which the position of the center of gravity can be adjusted in a vertical direction and a depth direction.

9 is a plan view of the wood head 40 in FIG. 8 as viewed from above.

FIG. 10 is a rear view of the wood head 40 in FIG. 8 as viewed from the rear.

11 is a modification example of FIG. 1, in which the position of the center of gravity is
It is a perspective view showing the appearance of wood head 40 which can be adjusted in the up-down direction and the depth direction.

12 is a rear view of the wood head 40 in FIG. 11 as viewed from the rear.

FIG. 13 is a front view showing a conventional wood head structure for a golf club.

14 is a plan view of a wood head 30 relating to the golf club in FIG.

[Explanation of symbols]

 Reference numeral 40: Wood head 41: Face part 42: Top part 43 ... Bottom part 44 ... Side part 45 ... Hosel part 51, 52 ... Groove

Claims (5)

[Claims] 1. A wood head structure for a golf club, comprising: a face portion of a wood head having left-right symmetrical and vertically symmetrical surfaces; an upper surface portion having a left-right symmetrical surface and including an upper side of the face portion; A bottom surface portion having a surface and including the lower side of the face portion in a vertically symmetric manner with the upper surface portion; and a left / right side of the face portion having a left / right symmetric surface located between the upper surface portion and the bottom surface portion. A wood head structure for a golf club, comprising: 2. The wood head structure for a golf club according to claim 1, wherein a left-right symmetrical groove is provided in the side surface portion. 3. The wood head structure for a golf club according to claim 1, wherein a vertically symmetrical groove is provided at a central portion of the upper surface portion and the bottom surface portion in the left-right direction. 4. The golf club according to claim 1, wherein a left-right symmetrical groove is provided in the side surface portion, and a vertically symmetrical groove is provided in a central portion of the upper surface portion and the bottom surface portion in the left-right direction. Wood head structure. 5. A wood head structure for a golf club, wherein various wood heads are formed by changing the degree of bending of the surface of the upper surface portion and the bottom surface portion.