JP2002219199A - Golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head which has an improved striking ball direction by stabilizing the striking point after improving a large-type head with capacity of over 270 cc. SOLUTION: In a hollow metal head which is molded to have the capacity of more than 270 cc, a weight body which has a weight of 3% or more of the head weight is characteristically placed in the area partitioned with a 5 cc cube body, located at face side by more than a half of the head width of the head body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a 270 cc volume.
A large golf club head.

[0002]

2. Description of the Related Art Golf club heads (hereinafter "heads")
In recent years, large heads having a volume of 270 cc or more have become the mainstream in golf clubs in order to increase the moment of inertia by increasing the moment of inertia of golf clubs. There is a tendency to suppress. Recently, larger heads having a volume exceeding 300 cc have appeared.

Since a golf club having such a head has a large moment of inertia of the head and does not largely shake when hitting the ball, a large miss shot can be obtained even if the ball is hit with a slight sweet spot removed. For this reason, today, the size and moment of inertia of the head of a golf club are one index for improving the performance.

[0004]

However, as the size of the head increases and the head has a large moment of inertia,
The fact is that the head weight is dispersed around the periphery, so that the head feels less at the time of swinging.

[0005] For this reason, in a golf club having such a large head, the position of the face is difficult to be sensed, and the swing is not stable. As a result, the position of the head and the ball at the time of hitting is likely to shift, and the hitting point varies. It was easy. Therefore, as described above, this type of head, which has been increased in size, does not have a large miss shot because the head does not shake greatly at the time of hitting, but the hitting point changes with each hitting and the hitting points do not concentrate, There was a risk that the number of nice shots hit at the sweet spot would be reduced.

Japanese Unexamined Patent Application Publication No. 11-319166 discloses a face portion 3 of a hollow metal head body 1 having a volume of 250 cc or more as shown in FIGS.
A head 9 in which a rod-shaped metal weight 7 extending from the toe side to the heel side of the head main body 1 is fixed on the inner surface of the sole portion 5 close to the head portion 1 is disclosed. However, such a head 9 has a structure in which the weight 7 is formed in a rod shape from the toe side to the heel side, so that the weight is dispersed in the toe and heel directions. However, there is a disadvantage that it is still difficult to stabilize the hit point and the directionality of the hit ball is not stable.

The present invention has been devised in view of the above circumstances, and provides a head in which a large head having a volume of more than 270 cc is improved to stabilize the hit point and improve the directionality of the hit ball. Aim.

[0008]

Means for Solving the Problems In order to achieve the above object, the invention according to claim 1 is directed to a hollow metal head having a volume of 270 cc or more. To the face side from 1/2, 3 of the head weight
% Of the weight body is arranged in a region partitioned by a cube of 5 cc.

The invention according to claim 2 is the invention according to claim 1.
In the head according to the above aspect, the weight body is disposed rearward within a region of 21.3 mm left and right of the sweet spot, and the invention according to the third aspect is the invention according to the first or second aspect. In the head, the weight is arranged at the same position in the toe and heel direction as the shaft inserted into the head body.

According to a fourth aspect of the present invention, in the head according to any one of the first to third aspects, the weight is located behind the sweet spot. The invention according to claim 5 is the invention according to claims 1 to 4.
In the head according to any one of the above, a support is formed in the head main body, and the weight is fixed to the support.

According to the first aspect of the present invention, the weight body makes the golfer sense the position of the face during the swing, and according to the second aspect of the invention, the weight body determines the position of the sweet spot during the swing. Let the golfer sense,
Furthermore, according to the third aspect of the present invention, the golf player can sense the direction of the face at the time of the swing.

According to the fourth and fifth aspects of the present invention, the weight body makes the golfer more strongly sense the position of the sweet spot during the swing, and as a result, the golfer hits the ball at a hit point close to the sweet spot. It is possible to do.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 and 2 show a head according to an embodiment of the present invention. In the drawings, reference numeral 11 denotes a metal such as stainless steel, maraging steel, or titanium alloy, and a top portion 13 excluding a face-side opening. A head body composed of a hollow outer shell in which a sole portion 15 and a side portion 17 are integrally formed by casting, and a tubular hosel portion (shaft not shown) (not shown) extending from the top portion 13 to the sole portion 15 on the heel side. A fixing portion) is formed integrally with the heel portion 19 of the head main body 11 with a gap provided therebetween. As shown in FIG.
(The highest part of the top part 13 at the time of addressing).

Then, a thin face plate 23 made of a β-type titanium alloy is welded to the face side opening of the head body 13 at a gap from the hosel part to have a volume of 270.
A cc hollow head 25 is formed, and the face plate 23 forms a face of the head 25. Thus, the head 25 according to the present embodiment is formed of a high specific gravity metal such as tungsten on the inner bottom surface 27 of the sole portion 15 in addition to the same configuration as the conventional one as described above.
A cubic-shaped weight body 29 having the above weight and formed so as to fit in a region partitioned by a 5 cc cube.
The center of gravity G1 is made coincident with the axis P in the top and sole directions passing through the sweet spot SS on the face plate 23 side from １ ／ of the head width A of the head main body 11,
It is arranged at the same position in the toe and heel directions as the shaft 31 inserted in the hosel part (positions aligned in the toe and heel directions).

The weight body 29 is a sweet spot SS.
In order to sense the vicinity as a hit point, it is preferable to arrange it at the toe side from the hosel part and to arrange it at a position except for the heel side from the hosel part. Then, as shown in FIG.
9 is made of a cast-in metal 33 that can be welded to the sole portion 15 as if it were a “filled metal”.
Is welded to the inner bottom surface 27.

Since the head 25 according to the present embodiment is configured as described above, when a golf club to which the head 25 is attached hits a ball, the weight body 29 concentrates at one point on the weight, and the sweet spot SS is given to the golfer at the time of swing. The golfer can sense the position of the ball and the direction of the face, and can hit the ball at a hit point near the sweet spot SS.

This is explained as follows. The present inventor has proposed a golf club having a length of 45 inches, a swing balance, D2, a head weight of 195 g, a head volume of 270 cc, a club frequency of 240 cpm, a shaft weight of 50 g, and a relatively large variation in hitting points. The stability of the hit points was evaluated based on the number of hits to a predetermined area of the sweet spot by 100 hits, 10 hits per person, 10 hits, mainly for golfers.

The predetermined sweet spot area is, as shown in FIG. 3, an area B having a radius of 21.3 mm from the sweet spot SS of the head 35, which is 42.6 m.
m, which is substantially equal to the diameter of a general golf ball. First, the inventor of the present invention set the head of the golf club to the head 35 shown in FIGS. 4A to 4C in order to confirm “evaluation of hit point stability based on the position of the weight body”.

In the head 35 of FIG. 4B, a cubic weight body 37 having a weight of 10 g is placed on the back 39 side of ヘ ッ ド of the head width, on the axis in the top and sole directions passing through the sweet spot SS. The center of gravity is aligned and disposed on the sole inner bottom surface 38, and the head 35 of FIG.
/ 2, on the face 41 side, the center of gravity coincides with the axis in the top and sole directions passing through the sweet spot SS, and the bottom surface 38 at the same position in the shaft and the toe and heel directions (positions aligned in the toe and heel directions). And also
The heads 35 shown in FIG. 4 (A) were not mounted with the weight body 37, and the number of hits of each of the heads 35 to the sweet spot predetermined area B was tested.

As a result, as shown in the experimental results of FIG.
It has been found that the number of hits of the head 35 in FIG. This is because, as shown in FIG. 6, the head 35 of FIG.
Since the distance L from the hand to the weight body 37 changes greatly during the swing from the address to the impact as compared with the head 35 of FIG. 7C, the distance from the hand to the part where the weight is sensed changes. It is difficult for the weight body 37 to function as an image of the sweet spot SS, and the head 35 in FIG. 4B is replaced with the head 35 in FIG.
Since the distance from the weight body 37 to the sweet spot SS is larger than that of the weight body 37, it is reasoned that it is difficult for the player to image the sweet spot SS by the weight body 37.

Next, the present inventor changed the weight ratio of the weight body 37 in order to confirm the "evaluation of the stability of the hitting point based on the weight ratio of the weight body". Here, the weight ratio refers to the weight of the weight body / head weight. FIG. 8 shows the results of this experiment, and it is clear that the weight ratio of 0% is a conventional example. When the weight of the weight body 37 is 3% or more of the head weight, the hit rate to the sweet spot predetermined area B is remarkably improved. became.

Finally, the present inventor considered, as “evaluation of the stability of the hitting point by the weight of the weight body”, how much the volume of the weight body 37 having a weight ratio of 3% or more obtained in the above experiment was effective. An experiment was conducted to see whether the effect was effective up to the size of. FIG. 9 shows the result of this experiment, in which the volume of the weight body 37 is 5 cc.
The following result was obtained that the hit number was excellent and effective.

As a result, the weight body 37 is located closer to the face than half of the head width, and when the weight ratio is 3% or more and the volume is 5 cc or less, the player can image the sweet spot SS. Is possible and this setting proved to be very effective. Therefore, according to the present embodiment, even if the head 25 is enlarged, the golfer can easily detect the position of the sweet spot SS by the weight body 29 during the swing. And the same position in the toe and heel directions (positions aligned in the toe and heel directions), the golfer can easily detect the direction of the face by the weight body 29, and as a result, the position close to the sweet spot SS It was possible to hit the ball with the ball, so that the hit point was always stable and the direction of the hit ball was stable.

Further, in the above embodiment, the weight body 29 is arranged such that the center of gravity G1 coincides with the axis P in the top and sole directions passing through the sweet spot SS, but at least the center of gravity as shown by the two-dot chain line in FIG. By arranging the weight body 29 so that G1 is located behind the area C of 21.3 mm left and right of the sweet spot SS, the intended purpose can be achieved similarly to the above embodiment.

Incidentally, 21.3 right and left of the sweet spot SS
The area C of about mm is substantially equal to the diameter of a general golf ball 43 of 42.6 mm. And the weight body may be provided integrally with the head main body, or a separate object may be fixed thereto. In this case,
It is preferable to use a material having a specific gravity higher than that of the head body.

Further, in the above embodiment, the weight body 29 is provided on the face plate 23 side with respect to the half of the head width A of the head main body 11, but further on the face plate 23 side with respect to the front side of the head width A with １ ／. , It becomes easier to detect the position of the face. Furthermore, a plurality of weight bodies may be provided in an area partitioned by a 5 cc cube. FIG.
11 shows a head according to the first embodiment of claims 1 to 5, and the head 25-1 according to the present embodiment is obtained by replacing the weight body 29 of FIG. When the weight body 29 is erected on the inner bottom surface 27 of the sole portion 15 via a support 45 formed of the same material as the cast-in metal 33, the weight body 29 is moved to the head width A of the head main body 11.
The center of gravity G1 is made to coincide with the axis P in the direction of the top and the sole passing through the sweet spot SS on the face plate 23 side from 1/2 of the
The shaft 3 inserted in the hosel part behind the S
1 and the same position in the toe and heel directions (positions arranged in the toe and heel directions).

The range behind the sweet spot SS is defined by extending a circle 44 with a radius of 21.3 mm centered on the sweet spot SS on the face surface as shown in FIG. Within the range, the weight body 29 may be within this range, or the center of the cube including the weight body 29 may be located in this range, and the same applies to each embodiment shown in FIG.

FIGS. 12 and 13 show a head according to a second embodiment of the present invention. A head 25-2 according to the present embodiment has a A stay-like support 47 is installed in the vicinity of the face in an oblique direction from the toe side to the heel side of the sole portion 15, and the support 47 is formed of a metal with a high specific gravity such as tungsten to reduce the head weight. A spherical weight body 49 having a weight of 3% or more and formed so as to fit in a region partitioned by a 5 cc cube is made to match the center of gravity with the axis P in the top and sole directions passing through the sweet spot SS, It is arranged at the same position in the toe and heel directions (position aligned in the toe and heel directions) with the shaft 31 inserted in the hosel part behind the sweet spot SS.

Thus, each of these heads 25-1 and 25-2
1 can achieve the intended purpose similarly to the head 25 of FIG. 1, and according to each of these embodiments, the weights 29 and 49 are smaller than those of the head 25 of FIG. , It is possible to further catch the ball at a hit point close to the sweet spot SS.

FIGS. 14 and 15 show one embodiment of the head according to the first, second and fourth aspects. The head 25-3 according to the present embodiment is provided with a face plate 23 corresponding to the sweet spot SS. On the back side of the head weight 3
% Of a hemispherical weight body 51 having a weight of not less than 5% and being contained in an area partitioned by a 5 cc cube is integrated with the face plate 23 with its center of gravity coincident with the axis P in the top and sole directions passing through the sweet spot SS. It is formed.

As described above, the weight body of the present invention is not limited to the weight body formed separately from the head main body but may be formed integrally with the head. Thus, according to the present embodiment, even if the head 25-3 becomes large, the golfer can easily detect the position of the sweet spot SS by the weight body 51 at the time of the swing, and as a result, the golfer can hit the ball at a position close to the sweet spot SS. It is possible to hit the ball, and as in the above embodiments, there is an advantage that the hit point is always stable and the direction of the hit ball is stable.

When the weights 29, 49, and 51 are provided so as to protrude inside the head main body 11 or provided inside the head main body 11 as in the above-described embodiments, the weights 29, 49, and 51 are provided. 49, 51 are sweet spot S
This is preferable because it approaches S.

[0033]

As described above, according to the head according to each claim, even in a large head having a volume of 270 cc or more, the golfer can easily detect the position of the face by the weight at the time of swing, so that the hit point Has always been stable.

According to the second aspect of the present invention, the hit point is stabilized at a position close to the sweet spot, and according to the third aspect of the present invention, the weight is arranged at the same position in the toe and heel directions as the shaft. By doing so, the direction of the hit ball was stabilized. Further, according to the inventions according to claims 4 and 5, there is an advantage that the hit point is stabilized at a position closer to the sweet spot.

[Brief description of the drawings]

FIG. 1 is a front view of a head according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the head shown in FIG.

FIG. 3 is a front view of the head showing an area having a radius of 21.3 mm from the center of the face.

FIG. 4 is a side view of the head showing a mounting position of the weight body.

FIG. 5 is an explanatory diagram of an experimental result.

FIG. 6 is an explanatory diagram of an experimental result.

FIG. 7 is an explanatory diagram of an experimental result.

FIG. 8 is an explanatory diagram of an experimental result.

FIG. 9 is an explanatory diagram of an experimental result.

FIG. 10 is a front view of a head according to a first embodiment of the present invention.

11 is a sectional view of the head shown in FIG.

FIG. 12 is a front view of a head according to a second embodiment of the present invention.

FIG. 13 is a cross-sectional view of the head shown in FIG.

FIG. 14 is a front view of a head according to one embodiment of the first, second, and fourth aspects.

FIG. 15 is a sectional view of the head shown in FIG. 14;

FIG. 16 is a plan view of a conventional head.

17 is a sectional view of the head shown in FIG.

[Explanation of symbols]

 11 Head body 25, 25-1, 25-2, 25-3, 35 Head 29, 37, 49, 51 Weight body 33 Cast-in metal 45, 47 Support

Claims (5)

[Claims] In a hollow metal golf club head having a volume of 270 cc or more, a face side of a half of a head width of the head body is provided.
A golf club head, wherein a weight having a weight of 3% or more of the head weight is arranged in an area partitioned by a 5 cc cube. 2. The weight body is located on the left and right of the sweet spot.
2. The golf club head according to claim 1, wherein the golf club head is disposed rearward within a 1.3 mm area. 3. The golf club head according to claim 1, wherein the weight is disposed at the same position in the toe and heel direction as the shaft inserted into the head body. 4. The golf club head according to claim 1, wherein the weight is located behind the sweet spot. 5. The golf club head according to claim 1, wherein a support is formed in the head main body, and the weight is fixed to the support. .