JP2002360748A - Head of golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to increase the size of the head by reducing the weight of the face, make it easy to strike a ball with by expanding the sweet area, obtain a right gear effect by increasing the depth of the center of gravity, and increase a carry by correcting a carrying direction. SOLUTION: A face 21 is composed of a perforated plate as a base in which many through holes 11 are scatteredly arranged and a cover covering at least one side of the perforated plate 10. A non-perforated plate 15 is used for the cover. Alternatively, the cover is formed by low temperature thermal spray of cemented carbide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head such as a driver, and more particularly to a face thereof.

[0002]

2. Description of the Related Art Conventionally, a titanium head or the like is used for forming a body for a head of a driver which is a golf club for a flight distance, and a hollow body having a face thereof is manufactured by a forging method, a casting method, or the like to reduce a required volume. We secure and use light weight. Improvements are being made in the direction of increasing the flight distance of the ball by making the face as thin as possible. In addition, as shown in FIG. 6, a plurality of parallel grooves, usually called score lines 2, are distributed in the face 1 at regular intervals, for example, eight. Thus face 1
The reason why the score line 2 is formed on the hitting surface is to make the face 1 thinner and increase the coefficient of restitution to extend the flight distance of the ball, and to give the ball a backspin with the groove 2 in the latter. It is based on the idea of extending the flight distance by earning time in the air. In the figure, 3 is a body, 4 is an upper part (crown), 5 is a bottom part (sole), and 6 is an internal space.

Such a body 3 is usually made into one piece when the product is manufactured only by the casting method, is made into two pieces when the casting method and the forging method are used, and is made into three pieces when only the forging method is used. In the case of, they are combined by welding, caulking or the like to make them integral. In this case, the face 1 is made of a single thin plate in any case. However, since the face 1 is the part requiring the highest impact resistance, the face 1 is thinned from the upper bottom parts 4 and 5 of the body 3. Thicken.

[0004]

However, if the face 1 is made thicker, it is difficult to reduce the weight of the face 1, so that the center of gravity of the body 3 becomes closer to the face 1 and the depth of the center of gravity becomes shallower. Then, the gear effect for increasing the rotation of the ball cannot be increased. Therefore, if the ball is hit with the core removed, the trajectory cannot be corrected and the flight direction becomes inaccurate. However, if the gear effect is too large, the flight distance will not be increased, so it is necessary to set an appropriate gear effect.

The present invention has been made in view of such a conventional problem. By reducing the weight of the face, it is possible to increase the size of the head, increase the sweet area, and make it easier to hit the ball. It is another object of the present invention to provide a golf club head capable of increasing the depth of the center of gravity, obtaining an appropriate gear effect, and making the flight direction accurate and extending the flight distance.

[0006]

In order to achieve the above object, a golf club head according to the present invention comprises a hollow body having a face. The face is formed from a perforated plate serving as a base in which a large number of through holes are dispersed and a cover covering at least one surface of the perforated plate.

It is preferable to use a plate having no holes in the cover. Further, the coating may be formed by a low-temperature spraying method of a cemented carbide.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view showing a state in which a face made up of a perforated plate and a plate without a hole is attached to the upper bottom of a body constituting a driver head to which the present invention is applied, and FIG. It is a perspective view which shows the assembling process which mounts the perforated plate body for face formation, and the plate body without a hole. This head has three bodies
The upper and lower parts 7, 8 of the body corresponding to the two pieces are made by forging. Then, when assembling the body, the upper bottom parts 7 and 8 are first joined by welding,
An opening 9 for assembling the face is provided there. Then, the flat plate 1 made by forging using, for example, a titanium alloy as a base of the face in the opening 9.
0 can be mounted.

Therefore, in order to reduce the weight of the face, a large number of through-holes 11 are distributed and arranged in the plate 10 almost uniformly, for example, in a honeycomb shape. At this time, if the volume of each hole 11 is increased, the plate body 10 is naturally easily lightened, but the strength of the plate body 10 is naturally inferior. Therefore, as shown in FIGS. 3 and 4, the area of the regular hexagonal hole 12 provided on the surface of the plate body of each hole 11 is large, and the area of the regular hexagonal hole 13 provided on the back surface is reduced. (14a, ... 14d,
…) Are all gently sloped.

Then, a material softer and lighter than the material of the plate body 10, for example, a synthetic resin containing carbon fiber,
By filling with hard rubber or the like and favorably supporting the inclined inner surface 14, even if a large number of holes 11 having a large volume are provided in the plate 10, the strength can be maintained. As a cover for forming a face that covers and reinforces the surface of the perforated plate body 10 serving as a base, for example, a flat plate-shaped plate member 15 without holes manufactured by a forging method made of a titanium alloy.
Is used.

A score line 1 is provided on the plate body 15 having no hole.
A plurality of, for example, seven laser beams 6 are formed by laser processing, and are moved together with the perforated plate 10 in the direction of the arrow at the time of assembling the face, and are mounted in the openings 9 provided in the upper bottom portions 7 and 8 of the body. At this time, the opening edges 17 of the upper body bottom parts 7 and 8
Is slightly thicker than the other portions, and the engaging projections 18 (18a, 18b)
Is provided. An engagement recess 19 (19a, 19b) corresponding to the perforated plate 10 is provided, and the plate 15 without a hole is provided.
The corresponding engaging recesses 20 (20a, 20b) are provided respectively, and they are fitted to each other to laminate the two plates 10, 15, and the opening edges of the upper body bottom portions 7, 8 by welding or adhesive. It couples to the part 17.

Then, as shown in FIG.
5 is completed, and the body 2
2 is completed. Therefore, the entire surface of the body 22 is coated with a synthetic resin paint or the like for preventing rust and scratches to complete the head, and the driver is completed by joining a shaft to the hosel 23 or the like. If the material of each of the plates 10 and 15 is different from the material of the upper and lower portions 7 and 8 of the body, they are caulked.

When the perforated plate 10 is used as the base of the face 21 in this manner, the weight of the face 21 can be reduced. Therefore, the head can be enlarged,
The ball can be hit easily because the sweet area can be widened. Further, by reducing the weight of the face 21, the depth of the center of gravity can be increased and the gear effect can be increased. Moreover, by reducing the weight of the face 21, it is easy to adjust the position of the center of gravity by changing the partial weight distribution of the upper body bottom parts 7, 8. Therefore, even if the ball is hit with the core removed, it is possible to reduce the movement of the head. Further, since an appropriate gear effect can be obtained, the flying direction can be made accurate and the flying distance can be extended.

In the above-described embodiment, in order to form the face 21, the surface of the perforated plate body 10 as a base is reinforced by covering it with a non-perforated plate body 15 having a plurality of score lines 16. A cemented carbide such as tungsten carbide is sprayed on the surface of the perforated plate 10 filled with each hole 11 by a low-temperature thermal spraying method at about 40 ° C. using compressed air, without using the plate 15 having no holes. May be formed. At this time, a plurality of score lines can be easily formed on the coating by laser processing. In the case where a plate 15 having no score and having a plurality of score lines 16 is used on the surface of the holed plate 10 serving as a base, the surface of the holed plate 10 filled with the holes 11 may be made of cemented carbide. The strength of the face can be further increased by forming a reinforcing coating by selecting the amount of spraying, the spraying position and the like by the low-temperature spraying method described above.

Further, in order to form a face, the back surface of the perforated plate 10 serving as a base is covered with a plate having no holes, and the surface of the perforated plate 10 is subjected to low-temperature spraying of a cemented carbide at a low temperature. A coating having a plurality of score lines may be provided by applying laser processing thereto. In addition, the surface of the perforated plate body 10 serving as a base is covered with a plate having no holes, and the surface of the plate having no holes has a plurality of score lines by low-temperature spraying of a cemented carbide and laser processing. Or by coating a synthetic resin paint or the like, and applying the coated surface to a coating having a plurality of score lines by laser processing.

In the above-described embodiment, the perforated plate 10 serving as a base for forming the face 21 and the plate 15 having no hole are used.
Although a titanium alloy was used for each, a non-metals such as a cemented carbide such as an amorphous alloy, other metals and carbon fibers, and a synthetic resin containing Kepler fibers and the like may be appropriately used for each plate. Good.

Further, in the above embodiment, a large number of through holes 11 are formed in the perforated plate 10 serving as a base for forming the face 21.
Are provided in a honeycomb shape so as to be almost uniformly provided, but the size, number, shape and the like of each hole can be appropriately selected and implemented. FIG. 5 shows a perforated plate body 25 in which a large number of small-diameter circular holes 24 are distributed almost uniformly over the entire surface as one embodiment. When the diameter of each hole provided in the perforated plate body is small, it is not always necessary to fill the inside with another material or the like. Each hole must be closed, for example, by forming a coating by a low-temperature spraying method of a hard alloy, so that the inside of the body cannot be seen through.

Further, in the above-described embodiment, a plate-shaped perforated plate 10 serving as a base for forming the face 21 is used. The strength of the plate body can be increased by forming a portion and making the corresponding position on the back surface a concave portion. At that time, for example, the center of the front surface is made to protrude most as a protrusion on the surface of the plate body, and a plurality of, for example, eight, radial protrusions are extended from the center so as to reach the edges, and are distributed almost evenly. It is preferable to form a similar radial groove as a concave portion.

[0019]

According to the present invention described above, claim 1
In the described invention, the face can be reduced in weight by forming the face from a perforated plate body serving as a base in which a large number of through-holes are distributed and a cover covering at least one surface of the perforated plate body. Since each of the holes of the perforated plate body can be closed by the covering body, the inconvenience due to the formation of a large number of through holes is eliminated.

Therefore, the head can be made larger and the sweet area can be made wider, so that the ball is easier to hit.
Further, by reducing the weight of the face, the depth of the center of gravity can be increased and the gear effect can be increased. In addition, the weight reduction of the face makes it easy to adjust the position of the center of gravity by changing the partial weight distribution of the upper bottom of the body. Therefore, even if the ball is hit with the core removed, it is possible to reduce the movement of the head. Further, since an appropriate gear effect can be obtained, the flying direction can be made accurate and the flying distance can be extended.

According to the second aspect of the present invention, a perforated plate serving as a base of a face can be easily reinforced by using a plate having no holes as a cover. All holes in the perforated plate can be easily closed.

According to the third aspect of the present invention, the coating is formed by a low-temperature spraying method of a cemented carbide, so that a perforated plate serving as a base of the face can be selected by a spraying amount, a spraying position, and the like. In addition to this, when the diameter of each hole provided in the perforated plate is small, it can be easily closed.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a face including a perforated plate and a plate without a hole is mounted on an upper bottom portion of a body constituting a driver head to which the present invention is applied.

FIG. 2 is a perspective view showing an assembling step of mounting a perforated plate for forming a face and a plate without holes on the upper bottom portion of the body.

FIG. 3 is a front view of the vicinity of one hole of the perforated plate body as viewed from the front side.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a front view showing another embodiment of a perforated plate serving as a base for forming a face of a driver head to which the present invention is applied.

FIG. 6 is a sectional view of a main part of a body constituting a conventional driver head.

[Explanation of symbols]

7, 8: Upper bottom of body 9: Opening 10, 25: Perforated plate 11, 24: Through hole 12: Surface hole 13
… Back hole 14… Slope inner surface 15… Plate without hole 1
6 ... score line 17 ... opening edge 18 ... engagement projection
19, 20 ... engagement recess 21 ... face 22 ... body 23 ... hosel

Claims (3)

[Claims] 1. A golf club head comprising a hollow body having a face, wherein a perforated plate serving as a base in which the face is provided with a large number of through holes dispersed therein, and a cover covering at least one surface of the perforated plate. And a golf club head formed from: 2. The golf club head according to claim 1, wherein a plate having no holes is used for the cover. 3. The golf club head according to claim 1, wherein the coating is formed by a low-temperature spraying method of a cemented carbide.