JP2002346008A - Golf putter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf putter allowing a user to hit a ball highly stably and visually recognize the sweet spot on the head easily. SOLUTION: The total shape of the head 11 is formed as a part of a sphere. The base end part of the neck is located on a trajectory of the center of gravity of the head 11 at the time of the swing, and the neck is inclined along the angle of a lie. The main axis of the shaft is nearly parallel to the face 13 of the head 11 and is made to pass the sweet spot on the head 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf putter.

[0002]

2. Description of the Related Art Among golf clubs used in golf, a golf putter, which is one of the most frequently used clubs, has conventionally proposed various techniques for stabilizing a hit ball.

[0003] A golf putter mainly comprises a head having a face surface as a hitting surface and a shaft mounted on the head, and a member called a neck is often used for mounting the head. For each of the head, shaft, and neck, various technologies have been conventionally developed for stabilizing a hit ball, such as a form and a material.

For example, an attempt has been made to increase the impact force at the time of hitting a ball by using a hard material for the head, and to obtain a hit ball having a desired strength with a smaller takeback.

[0005]

By the way, it is known that the structure and shape of the head as well as the material of the head and the shaft are important factors that determine the characteristics of the ball hit by the golf putter. There is also a need for a golf putter that is easy to hit visually at the sweet spot of the head.

The present invention has been made in view of the above circumstances, and has as its object to provide a golf putter which makes it easy to visually recognize the sweet spot of the head and has high stability in hitting a ball.

[0007]

According to the present invention, there is provided a golf putter comprising: a head having a face formed thereon; and a shaft mounted on the head via a neck. The overall shape of the head is formed so as to form a part of a sphere, the neck is located at a base end on the center of gravity trajectory of the head during a swing, and is provided inclined along the lie angle, A main axis of the shaft is substantially parallel to a face surface of the head and passes through a sweet spot of the head. In this golf putter, since the entire shape of the head is formed so as to form a part of a sphere, it is easy to visually recognize the sweet spot of the head. In addition, since the entire shape of the head forms a part of a sphere, the moment of inertia around the axis passing through the center of gravity is relatively large, and the tolerance of the hit point from the sweet spot is high. Also,
Since the base is located on the center of gravity orbit of the head at the time of the swing and is formed to be inclined along the lie angle, the line of the neck coincides with the center of gravity orbit, and the sweet spot of the head is formed. Further easy to recognize. In addition, even when the hit point deviates from the sweet spot, a twisting force does not easily act on the shaft. Furthermore, the main axis of the shaft is substantially parallel to the face of the head,
In addition, since the light passes through the sweet spot of the head, the sweet spot of the head can be more easily recognized. Here, the sweet spot is defined as a point lowered from the center of gravity of the head perpendicular to the face surface and its peripheral region, or an intersection between the ideal center of gravity trajectory of the head and the face surface during a swing and its peripheral region.

In this case, it is preferable that the head is provided with a plurality of spheres arranged on a trajectory of the center of gravity of the head during a swing. As a result, the momentum on the center of gravity trajectory during the swing increases, and the impact force at the sweet spot improves. Therefore, it is possible to obtain a hit ball having a desired strength with a small takeback.

[0009] The head may be provided with a plurality of spheres arranged in parallel with the face surface of the head. As a result, the moment of inertia about the vertical axis passing through the center of gravity increases, and the tolerance for the lateral shift of the hit point from the sweet spot increases.

[0010] The sole surface of the head may be provided with a concave portion that forms a part of the plurality of spheres. This reduces the substantial area of the sole, while having the advantage of increasing the impact force described above with the plurality of spheres. Therefore, the frictional resistance between the head and the ground surface during a swing is reduced.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a golf putter according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing a head 11 of a golf putter 10 according to the present embodiment, FIG. 2 is a front view of the head 11 shown in an arrow A of FIG. 1, and FIG. 3 is a plan view of the head 11 shown in an arrow B of FIG. FIG. 4 is a side view of the head 11 shown in arrow C of FIG. 1, and FIG. 5 is a perspective view showing a sole 12 of the head 11.

In the golf putter 10 of the present embodiment, the entire shape of the head 11 is formed so as to form a part of a sphere. That is, as shown in FIG. 3 and FIG.
1 form an arc 15 centered on a predetermined point (reference numeral P1 shown in FIGS. 3 and 4) on the face surface 13, and a head as a part of a sphere drawn from the arc 15 Eleven shapes are defined. The center P1 of the sphere is located at the center in the length direction of the head 11 (the left-right direction in FIG. 4). Accordingly, the center of gravity of the head 11 is also located at the center in the length direction of the head 11. ing. As a result, the head 11 passes through the center of gravity and
The whole is formed substantially symmetrically with respect to the length direction of the head 11 about an axis perpendicular to 3. The radius of the sphere is, for example, 54 mm.

The head 11 is composed of a base 20 having the above-described arc 15 as a contour, and a plurality of spheres 21, 22, 23, 24 provided on the base 20. The base 20 is formed in a substantially L shape, and has a face surface 13 on one surface and a sole surface 12a on another surface.

The plurality of spheres 21 to 24 are arranged in two directions (first sphere 21 and second sphere 22) arranged in a direction perpendicular to the face 13 and in parallel with the face 13. Two spheres (third sphere 23, fourth sphere 2
4). The plurality of spheres 21 to 24 are located on the back side of the face surface 13, and a part thereof is embedded in the base 20. For example, the radius of the first sphere 21 is 18 mm, and the radius of the second sphere 22 is 12 m
m, the radius of each of the third and fourth spheres 23 and 24 is 13 m
m.

In the present embodiment, the center of the first sphere 21 is
It substantially coincides with the center of gravity of the entire head 11. Further, the second sphere 22 is disposed behind the first sphere 21 and adjacent to the first sphere 21, and the center of the second sphere 22 is on the trajectory drawn by the center of the first sphere 21 during the swing. It is located in. That is, as shown in FIG. 2, the first sphere 21 and the second sphere 22 are arranged side by side on the center of gravity trajectory of the head 11 at the time of swing (= on the center trajectory of the first sphere 21). Height H of the first sphere 21 from above
The center height Hb of the second sphere 22 from the sole 12 is slightly higher than a. The trajectory of the center of gravity of the head 11 at the time of the swing is drawn in an arc shape around the fulcrum of the swing and by the radius of rotation (the symbol Ra shown in FIG. 2) including the length of the arm of the user and the length of the shaft 30. Things.

The third sphere 23 and the fourth sphere 24 are
As shown in FIG. 3, the heads 11 are separately arranged on both sides in the length direction of the head 11 with the first sphere 21 interposed therebetween. Thus, the first sphere 21, the third sphere 23, and the fourth sphere 24
Are arranged substantially parallel to the face surface 13 of the head 11. The center distance between the first sphere 21 and the third sphere 23 and the center distance between the first sphere 21 and the fourth sphere 24 are the same. The third sphere 23 and the fourth sphere 24 are formed in the same shape.

The head 11 is provided with a neck 31 (hosel, socket) for mounting the shaft 30. In the present embodiment, the neck 31 has a structure in which a cylindrical member is bent and welded, and the main axis of the shaft 30 to be mounted is aligned with the face surface 13 of the head 11.
Are formed so as to be substantially parallel to and pass through the sweet spot of the head 11. Also, a base end 31a of the neck 31
Is embedded in the second sphere 22 so as to be located on the trajectory of the center of gravity of the head 11 during the swing described above. Further, as shown in FIG. 4, the neck 31 has a predetermined lie angle (reference numeral θ1 shown in FIG. 4, for example, θ1 = 19 °).
And is curved around the sweet spot of the head 11.

As shown in FIG. 4, a slope 1 formed at a predetermined angle (eg, 12.8 °) with respect to a center sole surface 12a is formed at both ends in the left-right direction of the sole 12.
2b and 12c are formed. Moreover, the second sphere 22
The rear end of the sole 12 on which is disposed is also formed an inclined surface 12d formed by inclining at a predetermined angle (for example, 48 °) with respect to the central sole surface 12a. Further, as shown in FIG. 5, the sole 12 is provided with a recess 12e so as to form a part of the first sphere 21. Note that the position of the top of the first sphere 21 formed by the recess 12e substantially matches the sole surface 12a.

Next, the operation of the golf putter 10 of the present embodiment will be described. In the golf putter 10 of the present embodiment, since the overall shape of the head 11 is formed so as to form a part of a sphere, it is easy to visually recognize the sweet spot of the head 11. That is, since the entire head 11 is formed symmetrically in the length direction (left-right direction) of the head 11 with respect to the center of gravity of the head 11, the center in the length direction of the head 11 is visually grasped. Face surface 13
The upper sweet spot can be easily recognized.

Further, since the base of the neck 31 is located on the trajectory of the center of gravity of the head 11 at the time of the swing and is formed so as to be inclined along the lie angle,
From the user's point of view, the line of the neck 31 coincides with the center of gravity orbit. The main axis of the shaft is substantially parallel to the face 13 of the head 11 and passes through the sweet spot of the head 11. For these reasons, the golf putter 10 can more easily recognize the sweet spot of the head 11.

Note that the sweet spot on the face surface 13 of the head 11 is a point (P2 shown in FIG. 2) perpendicular to the face surface 13 from the center of gravity of the head 11.
Alternatively, it is the intersection of the center of gravity trajectory of the head 11 and the face surface 13 during the swing, and both are located at substantially the same position.

In the golf putter 10 of the present embodiment, the first sphere 21 and the second sphere 22 are provided side by side on the center of gravity of the head 11 at the time of swing, so that the center of gravity of the head 11 at the time of swing is provided. Momentum increases, and the power of impact at the sweet spot improves.
Therefore, a hit ball having a desired strength can be obtained with a small takeback. That is, the directionality in the takeback is suppressed, and the stability of the hit ball is improved.

Further, since the entire shape of the head 11 forms a part of a sphere, the moment of inertia around the axis passing through the center of gravity is relatively large, and the tolerance for the deviation of the hit point from the sweet spot is high. Further, in parallel with the face surface 13 of the head 11, the first sphere 21 at the position of the center of gravity is sandwiched,
Since the third sphere 23 and the fourth sphere 24 are provided side by side, the moment of inertia about the vertical axis passing through the center of gravity is large, and the tolerance to the lateral shift of the hit point from the sweet spot is high. In addition, even when the hit point deviates from the sweet spot, a twisting force does not easily act on the shaft.

In the golf putter 10 of the present embodiment, the sole 12 of the head 11 is provided with the recess 12e so as to form a part of the first sphere 21, so that the sole surface 12a is substantially formed. Small area. Also, the slope 12b is inclined at a predetermined angle with respect to the center sole surface 12a at both ends in the left-right direction and the rear end of the sole 12.
Since the 12c and 12d are formed, the area of the sole surface 12a is small. Therefore, the frictional resistance between the head 11 and the ground surface during the swing is reduced,
The directionality of the swing is stabilized.

As described above, the golf putter 1 of the present embodiment
According to 0, a sweet spot of the head 11 can be easily visually recognized, and a hit ball with high stability can be hit.

It should be noted that the shapes, combinations, and the like of the constituent members shown in the above-described embodiments are merely examples, and can be variously changed based on design requirements without departing from the gist of the present invention.

In the above embodiment, the head 11
Is formed by cutting, for example, after processing such as casting. Examples of the material of the head 11 include aluminum, alumina, carbon, ceramic, stainless steel, brass, soft iron, iron,
Any of wood and the like can be applied.

[0028]

As described above, according to the golf putter of the present invention, it is easy to visually recognize the sweet spot of the head, and the tolerance for the deviation of the hit point from the sweet spot is high. In addition, even when the hit point deviates from the sweet spot, a twisting force does not easily act on the shaft. Therefore, a hit ball with high stability can be hit.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a golf putter according to the present invention and showing a head.

FIG. 2 is a front view of the head shown in arrow A of FIG.

FIG. 3 is a plan view of the head shown in arrow B of FIG. 1;

FIG. 4 is a side view of the head shown in arrow C of FIG. 1;

FIG. 5 is a perspective view showing a sole of the head.

[Explanation of symbols]

 Reference Signs List 10 golf putter 11 head 12 sole 12a concave portion 13 face surface 21, 22, 23, 24 sphere 30 shaft 31 neck 31a base end

Claims (4)

[Claims] 1. A golf putter comprising: a head having a face formed thereon; and a shaft mounted to the head via a neck, wherein the overall shape of the head is formed so as to form a part of a sphere. The neck is provided with a base end located on the center-of-gravity trajectory of the head at the time of swing and inclined along the lie angle, and the main axis of the shaft is substantially parallel to the face surface of the head. And a golf putter which passes through a sweet spot of the head. 2. The golf putter according to claim 1, wherein a plurality of spheres are provided on the head on a trajectory of the center of gravity of the head during a swing. 3. The golf putter according to claim 1, wherein a plurality of spheres are provided on the head in parallel with a face surface of the head. 4. The golf putter according to claim 2, wherein the sole of the head is provided with a concave portion forming a part of the plurality of spheres.