JPH078580A - Gas filled golf club - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a gas-filled golf club head which is relatively light in weight and can easily make a large head having a large capacity. [Structure] A head cavity 1 is provided with a sole plate 2 welded thereto to provide a main body cavity portion 5 having an intermediate wall facing a hase portion. A valve 7 and a pressure regulating valve are provided to seal the gas in the body cavity 5. A plurality of gases having different specific gravities are filled, the inside of the main body cavity is separated into a plurality of chambers by the intermediate wall, or a rubber coating is put on the inner wall of the main body cavity. With this configuration, the head can be designed to be thin and the reflection of the shock wave to the face portion can be controlled. Also,
The degree of freedom in adjusting the wall thickness is increased, and by considering the selection of the mounting position of the gas injection valve, it becomes easy to design the head for concern and the sweet spot.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas filled golf club having a head provided with a hollow portion for filling gas therein.

[0002]

2. Description of the Related Art Metal wood is the most widely used golf club head wood club at present. Various materials are used. Among these metal woods, stainless steel is the most common in terms of cost and strength.

FIG. 4 is a sectional view for explaining a conventional example of a golf club head. 11 is a head shell, 12 is a sole plate, 13 is a shaft insertion hole, 14 is a welded portion, 15 is a hollow portion, and 16 is a hollow portion. The shaft and 17 are urethane foam.

In the conventional golf club head, as shown in FIG. 4, the sole plate 12 is welded to the bottom portion of the head shell 11 by the welding portion 14, and the hollow urethane portion 1 is filled with the urethane foam 1.
7 is injected and filled, and then the shaft 1 is inserted into the shaft insertion hole 13.
6 is fitted and fixed with an adhesive.

[0005]

However, the metal wood using the metal material has the following drawbacks. First of all, since the metal material has a large specific gravity, it is difficult for a golfer to make a large head with a volume of 200 cc or more and a weight of 200 g or less required by a golfer. Further, even if such a large head is formed, the wall thickness of the head portion becomes thin, which causes a problem that the strength and rigidity of the entire head deteriorate.

Secondly, it is said that the instantaneous load applied to the head by a professional golfer when hitting the ball reaches 1 ton, and a head having low strength and rigidity impinges on the head by the impact when the ball collides with the head. That is, instantaneous strain deformation occurs. Therefore, it is said that collision energy is not sufficiently transmitted to the ball, resulting in loss of flight distance. Further, the face portion needs to have a thickness of at least 3 mm or more so as not to be deformed by such an impact.

Further, the hollow portion 15 and the shaft insertion hole 1
When the shaft 16 is fitted into the shaft insertion hole 13 and fixed by an adhesive, if a lump of the adhesive enters the hollow portion 15, the head shell 11 moves around due to the impact when the ball is hit. A collision sound is generated between The urethane foam 17 is usually filled in the cavity 15 in order to eliminate such a problem and adjust the weight.
That is, in the case of a driver, it is usually 200 g-20
Lead is mixed so as to have a head weight of about 5 g and about 10 to 20 g of urethane foam 17 is filled. However, also in this case, there is a problem that the urethane foam 17 collapses due to the impact when the ball is hit, and moves around in the cavity. On the other hand, by filling the urethane foam 17, the degree of freedom in designing the thickness of the head shell 11 and the sole plate 12 is significantly limited, and as described above, the strength and rigidity of the entire head is reduced. Problems also arise.

An object of the present invention is to solve the above problems and to provide a gas filled golf club head which is relatively light in weight and can easily make a large head having a large capacity. Is.

[0009]

To this end, the present invention provides a head shell with a main body cavity having an intermediate wall facing the face portion by welding a sole plate to the head shell and isolating the main body cavity from the shaft insertion hole. It is characterized in that a sealed structure is provided, a gas injection valve and a pressure adjusting valve are provided, and gas is enclosed in the main body cavity.

Further, a plurality of gases having different specific gravities are enclosed, and the inside wall of the main body is separated into a plurality of chambers by an intermediate wall,
Alternatively, it is characterized in that the inner wall of the main body cavity is covered with a rubber coating.

Further, a sole plate is welded to the head shell to provide a main body cavity, and the main body cavity is isolated from the shaft insertion hole to form a sealed structure, and a gas injection valve and a pressure adjusting valve are provided to the main body cavity. It is characterized by enclosing a gas.

[0012]

In the gas-filled golf club head of the present invention, the head shell is welded to the sole plate to provide a main body cavity portion having an intermediate wall facing the face portion, and the main body cavity portion is isolated from the shaft insertion hole and hermetically sealed. Since the structure is adopted and the gas injection valve and the pressure adjusting valve are provided to enclose the gas in the cavity of the main body, it is possible to design the head thin and control the reflection of the shock wave to the face portion. Therefore, the degree of freedom in adjusting the wall thickness is increased, and by taking into consideration the selection of the mounting position of the gas injection valve, the design of the weight distribution of the head and the design of the sweet spot are facilitated, and the repulsive force can be improved. .

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of a gas filled golf club head according to the present invention, in which 1 is a head shell, 2 is a sole plate, 3 is a shaft insertion hole, 4 is a welded portion, 5 is a main body cavity, and 6 is The shaft, 7 is a gas injection valve.

In FIG. 1, the main body cavity 5 is formed in the head shell 1 so as to be separated from the shaft insertion hole 3, and the sole plate 2 is welded to the bottom welded portion 4 of the head shell 1 to form a hermetically sealed structure. One or more high-pressure gas is injected and filled. Therefore, the main body cavity portion 5
Is a sealing structure independent of the shaft insertion hole 3 so that the injected and filled high-pressure gas does not leak from the shaft insertion hole 3. The gas injection valve 7 is for injecting and filling high-pressure gas into the main body cavity portion 5. For example, similar to supplying combustion gas to a gas lighter, gas can be injected using a small portable gas cylinder. It was done. The gas pressure is maintained at about 1 to 5 kg / cm ² .
Therefore, the golfer can select an appropriate gas from a plurality of gases having different specific gravities according to his / her preference, physical strength, physical condition, etc., and replace it, or inject a plurality of gases in a mixed manner. The balance of can be easily adjusted.

When the gas injection valve 7 is provided on the sole plate 2 as described above, the gas injection valve 7 can be attached to the sole plate 2 before welding to the head shell 1, so that workability can be improved. Also, the gas injection valve 7
By selecting the mounting position of the near the tip of the head,
Since the moment of inertia can be increased, the directionality of the hit ball can be improved even when hitting with the sweet spot removed. As the gas, a pollution-free gas such as CFC gas, carbon dioxide gas, and argon gas, which has low reactivity and does not burn, may be used, or a plurality of gases having different specific gravities and characteristics may be mixed and used.

Particularly when gases having different specific gravities are mixed and used, the gas having a high specific gravity is distributed downward and the gas having a low specific gravity is distributed upward, so that the center of gravity of the club head can be set downward. As a result, it is possible to provide a golf club that has a low center of gravity and is easy for the ball to rise.

Furthermore, a gas injection valve may be provided for each of the interior partitions. By doing so, the tip room and the room at hand can be filled by combining the gases with different specific gravities as described above, and the rotation of the head when hitting with the sweet spot removed can be reduced and the moment of inertia of the head can be reduced. Can be increased and the directionality of the ball can be improved.

It has been relatively easy to make a conventional golf club heavier than the standard specifications at the time of marketing by sticking a lead plate or the like, but conversely, it is necessary to modify the commercially available golf club to make the balance lighter. It was impossible. In that respect, in the case of the present invention, since the filling and replacement of the gas can be easily performed as described above, the balance can be freely adjusted by selecting the filling gas, and further, a plurality of gases having different specific gravities can be used. It is also possible to perform delicate adjustment of the center of gravity by combining and filling with. Moreover, since there is no foreign matter such as a lead plate in appearance, useless air resistance is not added, and the head can be adjusted without causing any visual discomfort.

As described above, the gas-filled golf club of the present invention is provided with the gas injection valve 7 so that the gas can be injected from there. Even if the internal pressure of the main body cavity 5 drops due to leakage from a very small pinhole of the head shell 1, a small portable gas cylinder prepared separately just before using the club allows the main body cavity 5 to be easily passed through the gas injection valve 7. Can be filled with gas. Further, in order to prevent such gas leakage, it is also effective to preliminarily apply a rubber coating to the inner wall of the main body cavity portion 5 by using, for example, a tire puncture repair material. Further, in order to prevent the internal pressure from being increased more than necessary, a pressure adjusting valve may be additionally provided to release the internal gas to the outside when a load of a certain level or more is applied. This is especially effective when the vehicle is left in the trunk of a car in the middle of summer and becomes hot and the internal pressure rises. Of course, when there is a gas injection valve that also serves as a pressure adjusting valve, this gas injection valve may also serve as a pressure adjusting valve.

FIG. 2 is a view showing another embodiment of the gas filled golf club of the present invention, where 8 is a gas filled golf club head, 9 is an intermediate wall, and 10 is a ball. According to the gas-filled golf club of the present invention, since the high-pressure gas is filled in the main body cavity, the sound wave and the shock wave propagate much faster than in the case where the gas is not filled. Therefore, if an intermediate wall 9 is provided in the main body cavity as shown in FIG. 2, the intermediate wall 9 causes the shock wave when the ball 10 is hit to be reflected to the face portion, the tip portion (TOE), etc. It is possible to convert energy into repulsive energy of the face portion, adjust the rotation moment, and change the hitting sound. The ball contact time at the face portion of the driver (W1) is generally said to be about 4/10000 seconds. Because the sound velocity at room temperature is 334 m / sec, the propagation speed is 133.6 mm during the ball contact time.
Propagate over the distance. Therefore, it is possible to return the shock wave from the intermediate wall to the face portion within the contact time of the ball in the high-pressure gas, and the time for the reflected shock wave to return to the face portion, the toe portion, etc. It can be freely adjusted by the position, the pressure of the gas to be filled, the specific gravity, and the like.

For example, the golf scrub rotates about the center of gravity G in the X or Y direction when the spot is removed and the impact is made. However, when the shock wave is reflected by the intermediate wall toward the tip portion of the head as shown in P, a force in the X direction acts, so that the force that attempts to rotate in the Y direction can be weakened. Therefore, the intermediate wall 9 is not limited to a flat plate, but may be a concave surface with respect to the face, a convex surface, a V shape, an inverted V shape, or a direction (angle) depending on the position, and from any other curve or face portion. By providing the sole plate at a distance of, it is possible to perform control according to the above purpose. Further, the intermediate wall 9 may also be used as a partition inside the head, and different chambers may be filled with different gases, so that the gravity center position may be set by combining their specific gravities and characteristics.

Moreover, in the gas-filled golf club of the present invention, the inside becomes completely hollow, and the moment of inertia of the head can be adjusted by selecting the specific gravity, mixing ratio, etc. of the gas to be filled. When the moment of inertia of the head becomes large, the rotation of the head becomes small when hitting with the sweet spot (center) as described above, and the directionality of the ball can be improved.

FIG. 3 is a diagram showing the relationship between the shaft insertion hole and the hollow portion, (a) shows an example in which the shaft insertion hole is provided up to the upper side of the main body hollow portion, and (b) shows the shaft insertion hole. An example is shown in which is provided so as to penetrate to the side of the hollow portion. In the embodiment shown in FIG. 1, the shaft insertion hole 3 is formed up to the middle of the main body cavity portion 5 and its tip is cut off from the main body cavity portion 5. However, as shown in FIG. 3 ′ may be provided up to the upper side of the main body hollow portion 5, or the shaft insertion hole 3 ″ may be provided so as to penetrate to the side of the hollow portion 5 as shown in FIG.

The present invention is not limited to the above embodiment, but various modifications can be made. For example, in the above-described embodiment, the gas injection valve is provided on the sole plate, but it may be provided on the side opposite to the face portion of the head shell or at another position. Further, although the sole plate is welded to the bottom portion of the head shell 1, it goes without saying that the phase portion may be welded. Further, the weight distribution of the head may also be designed by providing not only the sole plate but also the head shell 1 so as to project from the inner wall.

As described above, the gas-filled golf club of the present invention is applicable to not only metal woods such as stainless steel, titanium, and aluminum that are widely used, but also carbon wood, hollow iron, and the like having a hollow head. Is also applicable.

[0026]

As is apparent from the above description, according to the present invention, the head is filled with gas, so that the head is instantaneously deformed by the internal pressure of the gas in the head even when the ball is impacted. Can be suppressed, and an intermediate wall can be provided to return the shock wave to the hase portion within the ball contact time. Therefore, it is possible to prevent energy loss and secure a sufficient flight distance. Moreover, the head can be covered with a high-strength stainless alloy or the like with a uniform thickness and hermetically sealed, which enables a thin design.
Even if the head is thin and lightweight, it is possible to provide a highly safe head that is not broken or ruptured by the internal pressure of gas. Furthermore, since the weight of conventional urethane foam and the face can be distributed to the head body, the center of gravity can be effectively distributed, the sweet spot can be widened, and a golf club with a good directionality of a hit ball can be designed. be able to.

Further, by providing the intermediate wall in the main body cavity, it is possible to control the reflection of the shock wave in the cavity, improve the flight distance, and change the hitting sound. Furthermore, the distribution of the center of gravity can be freely adjusted by the intermediate wall, gas injection valve, pressure control valve, wall thickness adjustment, partition of the room by the intermediate wall, mixed combination of gas to be filled, selection of specific gravity at that time, etc. Therefore, the design of the sweet spot and the design of the moment of inertia can be facilitated.

[Brief description of drawings]

FIG. 1 is a diagram showing one embodiment of a gas filled golf club head of the present invention.

FIG. 2 is a view showing another embodiment of the gas filled golf club of the present invention.

FIG. 3 is a diagram showing a relationship between a shaft insertion hole and a hollow portion.

FIG. 4 is a sectional view for explaining a conventional example of a golf club head.

[Explanation of symbols]

1 ... Head shell, 2 ... Sole plate, 3 ... Shaft insertion hole, 4 ... Welding part, 5 ... Main body cavity part, 6 ... Shaft,
7 ... Gas injection valve

Claims (5)

[Claims] 1. A head shell is provided with a body cavity having an intermediate wall facing the face by welding a sole plate, and the body cavity is isolated from a shaft insertion hole to form a sealed structure, a gas injection valve and a pressure. A gas-filled golf club, characterized in that a regulating valve is provided and a gas is enclosed in the main body cavity. 2. The gas-filled golf club according to claim 1, wherein a plurality of gases having different specific gravities are filled. 3. The gas-filled golf club according to claim 1, wherein the interior of the main body cavity is divided into a plurality of chambers by an intermediate wall. 4. The gas-filled golf club according to claim 2, wherein a rubber coating is provided on the inner wall of the main body cavity. 5. A head cavity is formed by welding a sole plate to a head shell, and the body cavity is isolated from a shaft insertion hole to form a sealed structure. A gas injection valve and a pressure adjusting valve are provided in the body cavity. A gas filled golf club, which is filled with gas.