JPH0727630U - Golf club head - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a club head capable of easily adjusting the weight and the position of the center of gravity. [Structure] Liquid resin L is injected into a hollow portion 3a of a club head body 1 through a hole 9 for inserting a shaft of a neck portion 8 and the liquid resin L is stored at a desired position of a back portion 7 or the like. The liquid resin L is cured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head, and more particularly to a golf club head capable of easily adjusting the weight and the position of the center of gravity of the club head.

[0002]

[Prior art]

 As is well known, the ease of swinging a wood club such as a driver (including so-called metal wood, carbon wood, ceramic wood, etc.) at the time of swing greatly depends on the weight of the club head. Depending on the position of the center of gravity, the ball muscle, ball quality, feeling, etc. vary greatly.

In addition, if a foreign object (for example, a chip) that can move freely inside the hollow portion of the club head exists, the foreign object collides with a surrounding member each time a swing occurs, and an abnormal noise is generated. However, golfers feel uncomfortable every time they swing.

Conventionally, Japanese Utility Model Publication No. 38-2829 is known as an example of “weight adjusting means” for a golf club head. The weight adjusting means disclosed in this publication has a concave portion formed on the sole surface side of a club, a balance weight can be arranged in the concave portion, and the weight is adjusted by adjusting the number of balance weights. Is made possible.

As a means for preventing the free movement of foreign matter in the hollow portion of the head, Japanese Utility Model Publication No. 3-1014 is known. As a means for preventing the generation of abnormal noise in the hollow portion of the head, which is fairly disclosed, an adhesive layer is formed in the hollow portion, or a high-viscosity liquid is injected to stick the foreign matter to the adhesive layer, etc. Noise is prevented from occurring by preventing free movement.

[0006]

However, the weight adjusting means disclosed in Japanese Utility Model Publication No. 38-2829 has the following disadvantages. In other words, the cost increases due to the increase of parts and processing man-hours, and the screw for fixing the balance weight may be loosened and lost, so that "weight adjustment" is possible but "center of gravity position adjustment" is not possible. there were.

Further, among the measures against abnormal sound in Japanese Utility Model Publication No. 38-2829, in the case of the adhesive layer, the adhesive layer may be peeled off by impact upon impact or may be removed for a long time (for example, several years) depending on the size of foreign matter or chips. ), It is difficult to keep the foreign matter adhered. In the case of high-viscosity liquids, the golf rules (issued by the Japan Golf Association) states that "a club consists of one shaft and one head, and all parts of the club are a single unit. Must be fixed in place ”, there was a problem that liquid could not be enclosed inside the club head.

Therefore, the present invention has been made to solve the above problems, and it is possible to easily adjust the weight and position of the center of gravity of a club head when manufacturing a golf club, and to adjust the position inside the hollow portion of the club head. It is an object of the present invention to provide a golf club head that reliably prevents free movement of foreign matter and the like.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention injects an appropriate amount of the liquid L into the hollow portion 3a, and adhesively cures the liquid L at a desired position in the hollow portion 3a.

[0010]

[Action]

 According to the present invention, for example, a thermosetting liquid L is injected into the hollow portion 3a of the club head main body 1 from the hole 9 of the neck portion 8 by a desired weight, and after the injection, the inside of the club head main body 1 is filled. The liquid L is stored at a desired position, heated, and cured. Therefore, the weight of the club head body 1 and the position of the center of gravity can be easily adjusted.

[0011]

Embodiment Hereinafter, the present invention will be described based on an illustrated embodiment. FIG. 1 is an external perspective view of the club head body 1 of the golf club head of this embodiment, and FIG. 2 is a sectional view taken along line II-II in FIG.

As shown in FIGS. 1 and 2, a face portion 2 which is a ball striking face is formed on the front surface side of a club head body 1 made of carbon FRP, metal (aluminum, titanium, stainless steel, etc.), ceramics and the like. The sole portion 4 is formed on the ground side. A substantially convex spherical top portion 3 is formed on the upper surface of the club head body 1, a hollow portion 3a is formed inside the top portion 3, and a boss 3b is formed downward from the center of the inner surface of the top portion 3. Has been formed. On the sole portion 4, a sole plate 4a having excellent wear resistance is fixed to the boss 3b with a screw 11. A neck portion 8 having a through hole 9 for inserting a shaft (not shown) is formed on the right side of the club head body 1 so as to project to the upper right, and a heel portion 6 is formed on the lower side of the neck portion 8. There is. A toe portion 5 is formed on the front end side (left side) of the club head body 1, and a back portion 7 is formed on the rear end side. A face plate made of titanium, carbon fiber, or the like, which is formed separately, may be attached to the face portion 2 by screws, welding, or adhesion, and the sole plate 4a is integrated with the sole portion 4. May be welded together.

Next, a method for adjusting the weight and adjusting the position of the center of gravity of the club head body 1 configured as described above will be described. The center-of-gravity position and weight of each club head body 1 are measured in advance with a commercially available center-of-gravity meter (for example, a center-of-gravity position measuring instrument manufactured by Kamoshita Seieisho Co., Ltd.). Based on the measurement results, the optimum position of the center of gravity for each golfer and the weight adjustment according to the golfer's physique and physical strength are performed as follows.

First, by using the hole 9 for mounting the shaft, a room-temperature curable or thermosetting liquid resin (for example, silicone RTV rubber or silicone gel manufactured by Shin-Etsu Chemical Co., Ltd.) is injected in a required weight. , Secure the desired head weight. The liquid resin injection port may be formed in the sole portion 4, the back portion 7, or the like.

Next, in order to set the center of gravity to the optimum position, the club head main body 1 after the liquid resin is injected is tilted to move the liquid resin to a desired position. For example, as shown in FIG. 3, the liquid resin L is stored on the back portion 7 side in order to reduce the left-right deviation of the ball, and as shown in FIG. 4 in order to correct the ball muscle of the sliced ball. In order to store the liquid resin L on the toe portion 5 side so that the ball can easily go up, the liquid resin L is stored on the sole portion 4 side as shown in FIG.

Then, after the liquid resin L is stored in each of the above-mentioned positions (FIGS. 3 to 5), the liquid resin L is cured at room temperature or by heating. In addition, at room temperature, it cures in several days, and when heated at 100 ° C., it cures in about 15 minutes. Further, in the case of the silicone gel, it becomes a gel after curing.

In addition, the movement of chips and the like existing in the hollow portion 3a of the club head body 1 can be prevented by the following method. That is, as shown in FIG. 6, after injecting the liquid resin L into the hollow portion 3a of the club head body 1, the club head body 1 is rotated so that the liquid resin L is applied to the entire inner wall 1a of the club head body 1. After adhering (adhesive resin is shown by reference numeral 13), the liquid resin L is stored and cured at an appropriate position for adjusting the position of the center of gravity (for example, the position shown in FIG. 5). Then, not only the position of the center of gravity can be adjusted, but also foreign matters and chips 12 generated in the manufacturing process of the club head can be cured while being sealed in the liquid resin L (not just sticking or bonding). It is possible to prevent abnormal noise (unpleasant noise) generated by foreign matter, chips 12, etc. moving and colliding in the hollow portion 3a during the swing of the golf club, and it is sealed. The chips 12 etc. do not peel off.

By using the club head manufactured as described above, it is possible to manufacture a golf club suitable for individual preference in terms of ease of swinging out, ball muscle, ball quality, and feeling.

In this example, the case where silicone RTV rubber or silicone gel manufactured by Shin-Etsu Chemical Co., Ltd. was used as the liquid resin L was explained, but in addition, it is usually liquid and left at room temperature. Alternatively, any liquid may be used as long as it is a liquid that is cured by heating, and it may be a two-liquid type or a one-liquid type.

Further, as shown in FIG. 7, for example, an amateur golfer removes the grip 22 of the golf club 20 he holds, and the liquid resin L is attached to the hollow shaft 21 through the opening 23 at the grip end of the hollow shaft 21. It is also possible to pour it into the club head main body 1 through the above and to cure the liquid resin L at a desired position (FIGS. 3 to 5) in the manner described above.

Further, in the present embodiment, the case of a so-called wood club such as a driver has been described, but it is needless to say that the present invention can be applied to an iron provided with a hollow club head.

[0022]

[Effect of device]

 As described above, according to the present invention, the curable liquid is injected into the club head main body in a desired weight and the liquid is cured at the desired center of gravity position in the head main body. It is possible to easily improve the head performance according to the position of the center of gravity.

[Brief description of drawings]

FIG. 1 is an external perspective view of a club head body used in the present invention.

FIG. 2 is a sectional view taken along line II-II of the club head body.

FIG. 3 is a bottom view including a partial cross section showing a state in which the liquid resin is stored in the back portion of the head.

FIG. 4 is a bottom view including a partial cross section showing a state where liquid resin is stored in the toe portion of the head.

FIG. 5 is a front view including a partial cross section showing a state in which the liquid resin is stored in the sole portion of the head.

FIG. 6 is a front cross-sectional view showing a state in which liquid resin is attached to the hollow inner surface of the head.

FIG. 7 is an explanatory diagram for injecting a liquid resin when the shaft is fixed to the club head.

[Explanation of symbols]

 1 ... Club head body 2 ... Face part 3 ... Top part 3a ... Hollow part 3b ... Boss 4 ... Sole part 4a ... Sole plate 5 ... Toe part 6 ... Heel part 7 ... Back part 8 ... Neck part 9 ... For shaft insertion Hole 12 ... foreign matter

Claims (1)

[Scope of utility model registration request] 1. A golf club head, wherein a proper amount of liquid is injected into the hollow portion and the liquid is adhesively cured at a desired position in the hollow portion.