JP3052305B2 - Golf club - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a golf club.

[0002]

A golf club comprises a shaft and a club head, and is usually made of wood, iron,
And putters. Irons are classified according to the loft angle and have a small loft angle (for example, 20 to 3).
An iron having a large loft angle (for example, 40 to 50 degrees) is referred to as a short iron. Irons are numbered from long irons to short irons, for example, first, second to eighth, ninth, PW (pitting wedge), SW (sand wedge), LW (lob wedge, lob wedge). ). Conventional iron heads have a face and a back surface (back surface) for hitting a golf ball. The back has a cavity (dent) and the back has a smooth surface. Since the surface back (solid back) is well known and the center of gravity of the cavity back can be generally set backward, the sweet spot, that is, the best result when hitting a golf ball is obtained from the head of the solid back. The area on the face is large. However, in a cavity-back head, there is a limit in setting the center of gravity behind the face, and there is also a limit in the sweet spot.

In order to solve such a problem, the same applicant has disclosed in Japanese Patent No. 2526530 a structure in which a rear shell is provided behind a face through a hollow portion and a weight is provided at a rear end of the rear shell. Japanese Patent Application Laid-Open No. Hei 6-296716 proposes a structure in which a rear shell is provided behind a face through a hollow portion and a weight is provided on a sole of the rear shell. However, in such a head, there is a possibility that it is difficult to freely set the weight balance and the position of the center of gravity by the weight, and it is impossible to provide a head suitable for each player. Further, since the weight is provided only on the rear shell, there is a problem that the face strength is limited and the hit feeling is not good.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a golf club capable of freely setting the weight balance and the position of the center of gravity by weights. Another object of the present invention is to provide a golf club having a face having sufficient strength and excellent hit feeling.

[0005]

According to the first aspect of the present invention, there is provided a golf club having a shaft mounting portion on one side, a face plate provided on a front surface, and a rear shell provided through a hollow portion behind the face plate. In a golf club in which a shaft is connected to a club head, a weight is provided in the hollow portion,
A screw shaft having a distal end screwed to the rear surface of the face plate is passed through the hole of the weight, and a large-diameter portion formed on the proximal end side of the screw shaft is passed through a hole formed in the rear shell and fixed. It is a golf club characterized by the ability to freely set the weight balance and the position of the center of gravity by weight.

According to a second aspect of the present invention, there is provided the golf club according to the first aspect, wherein the weight is provided on both sides or one side of the toe side and the heel side of the face plate. The weight balance can be biased.

According to a third aspect of the present invention, there is provided the golf club according to the second aspect, wherein the weight is provided so as to substantially extend from a rear surface of the face plate to the rear shell.
The sweet spot can be enlarged by increasing the distance between the center of gravity of the head and the face.

According to a fourth aspect of the present invention, there is provided the golf club according to the third aspect, wherein the weight is fixed to the rear shell. Since the weights can be integrated, the strength of the face can be increased and the feel at impact can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. The golf club of the embodiment is 1
No. 2, No. 8 to No. 9, No. 9, PW, SW, LW and the like are shown, and the head 1 has a face plate 3 provided with a face 2 for hitting a golf ball (not shown). A rear shell 5 forming a sole 5A is provided behind the face plate 3 via a hollow portion 4, and a hosel 7 serving as a shaft mounting portion for connecting a shaft 6 to one side of the face plate 3 is integrally formed. Is provided. The face plate 3 and the rear shell 5 are formed from a metal such as titanium or a titanium alloy. In the figure, reference numeral 8 denotes a heel of the head 1, and reference numeral 9 denotes a toe.

A weight 11 provided on the rear surface 10 of the face plate 3 has first and first vertical portions on the heel 8 side and the toe side 9 of the horizontal rib 12 which is a horizontal portion disposed laterally with respect to the rear surface 10. The first and second vertical ribs 13 and 14 are integrally provided, and the weight balance of the weight 11 is distributed to both sides of the heel 8 side and the toe 9 side. Note that the second vertical ribs 14 are formed slightly larger than the first vertical ribs 13. Further, at two places where the horizontal ribs 12 and the vertical ribs 13 and 14 intersect, rear projections 15 and 16 are provided to project rearward almost to the rear shell 5,
Holes 17 into which screw shafts to be described later are inserted into the rear protruding portions 15, 16
Are provided respectively. The weight 11 is formed of a material having a higher specific gravity than the material of the face plate 3 and the rear shell 5, for example, metal such as copper, beryllium copper alloy, and steel such as stainless steel. Then, in a state where the weight 11 is applied to a convex portion 18 which is provided integrally with the rear surface 10 and has substantially the same shape as the front surface of the weight 11,
First and second screw shafts 19 and 20 forming a part of the weight and forming means for attaching the weight are passed through the hole 17, and the tips of the left and right female screws 21 provided on the projection 18 are connected to the pair of left and right female screws 21. The weight 11 is fixed to the rear surface 10 by screwing and attaching the large-diameter portion 22 formed on the base end side of the screw shafts 19 and 20 to the rear protruding portions 15 and 16. Reference numeral 23 denotes a flat portion formed at the base end of the screw shafts 19, 20. The screw shafts 19, 20 are rotated by sandwiching the flat portion 23 with a tool such as a wrench (not shown). I have.

Therefore, when the head 1 is manufactured, the weight 11 is attached to the face plate 3 manufactured in advance by the screw shaft 1.
Then, the edge 5B of the rear shell 5 is integrated with the edge 3A of the face plate 3 by fixing means such as welding, bonding or fitting, and the diameter of the base end of the screw shafts 19, 20 is increased. Department
22 and the flat portion 23 are passed through holes 24 formed in the rear shell 5 in advance, and the large-diameter portions 22 of the screw shafts 19 and 20 are fixed to the rear shell 5 by appropriate fixing means such as welding or bonding. Thereafter, the large-diameter portion 22 of the screw shafts 19 and 20 protruding from the hole 24 of the rear shell 5 and the flat portion 23 are removed by appropriate removing means such as grinding and cutting to remove the large-diameter portions of the screw shafts 19 and 20.
The end surface of 22 is formed flush with the outer surface of the rear shell 5.

Next, the operation and effect of the above configuration will be described.
When hitting a golf ball, the center of gravity G of the head 1 can be positioned rearward by the weight 11 provided on the rear surface of the face plate 3, so that the distance between the face 2 and the center of gravity G, that is, the depth of the center of gravity can be increased, and the sweetness can be increased. The spot can be expanded. Moreover, by mounting various weights 11 according to the player, that is, according to the skill and habit of the player, it is possible to provide the optimum head 1 for each player.

Further, the weight 11 is provided with a horizontal rib 12.
The first and second vertical ribs 13 and 14 are integrally provided on both sides of the heel 8 side and the toe 9 side, so that the weight (mass) balance of the weight 11 is separated on both sides of the heel 8 side and the toe 9 side. Distributed. Therefore, when the golf ball is hit, the moment of inertia of the head 1 can be increased. As a result, the stability of the head at the time of hit can be improved, and when the weight (mass) is concentrated at the center of the head. Since the weight balance is dispersed around the face 2 as compared with the above, the sweet spot can be enlarged.

In addition, the weight 11 has a rear projecting portion 1 at the intersection of the horizontal rib 12 and the first and second vertical ribs 13 and 14.
Since the weights 5 and 16 are provided, the center of gravity of the weight 11 itself can be set at the rear, and as a result, the center of gravity G can be set at the rear of the head 1 and the depth of the center of gravity can be further increased. .

A screw shaft constituting a part of the weight 11
Since the heads 19 and 20 are also fixed to the rear shell 5, the head and the weight 11 can be more firmly integrated, and the strength of the face 2 can be increased by supporting the face plate 3 by the entire head, and the hit feeling can be improved. Can be better.

FIG. 4 shows a second embodiment.
The same parts as those of the embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the second embodiment, first and second weights 11A and 11B are fixed to the heel 8 side and the toe 9 side of the rear surface 10 of the face plate 3, respectively. This weight 11
The materials of A and 11B are the face plate 3 and the back shell 5 as described above.
A material having a specific gravity greater than that of the material is used. Therefore, the center of gravity G of the head 1 can be located behind the head 1 by the weights 11A and 11B provided on the rear surface 10 of the face plate 3, and the depth of the center of gravity can be increased to enlarge the sweet spot in FIG. The weights 11A and 11B are on the rear side.
The weights (mass) of the weights 11A and 11B are balanced on the heel 8 side because the heel 8 side and the toe 9 side of 10 are provided on both sides.
It is distributed away to the toe 9 side, and when hitting a golf ball, the moment of inertia of the head 1 can be increased to improve the stability of the head. In addition, weight 11
Since A and 11B are provided with rear projections 15 and 16, the weights 11A and 11B can be set with their centers of gravity rearward.
The center of gravity G can be set behind the head 1, and the depth of the center of gravity can be further increased.

A screw shaft constituting a part of the weight 11
Since the heads 19 and 20 are also fixed to the rear shell 5, the head and the weight 11 can be more firmly integrated, and the strength of the face 2 can be increased by supporting the face plate 3 by the entire head, and the hit feeling can be improved. Can be better.

The present invention is not limited to the above-described embodiment. For example, three or more weights may be provided. In this embodiment, the weights are biased to both sides of the heel 8 and the toe 9. Although the weight is provided, the weight may be provided only on one side depending on the skill or habit of the player.

[0019]

According to the first aspect of the present invention, there is provided a golf club head having a shaft mounting portion on one side, a face plate on the front surface, and a rear shell provided behind the face plate via a hollow portion. In a golf club to which a shaft is connected, a weight is provided in the hollow portion, a screw shaft having a distal end screwed to a rear surface of the face plate is passed through a hole of the weight, and a large diameter formed on a proximal end side of the screw shaft. The golf club is characterized in that the portion is passed through the hole formed in the back shell and fixed, and the weight balance and the position of the center of gravity by the weight can be freely set, and the head and the weight can be more firmly integrated. By supporting the face plate with the entire head, the strength of the face can be increased and the feel at impact can be improved.

According to a second aspect of the present invention, there is provided the golf club according to the first aspect, wherein the weight is provided on both sides or one side of the toe side and the heel side of the face plate. The weight balance can be biased.

According to a third aspect of the present invention, there is provided the golf club according to the second aspect, wherein the weight is provided so as to substantially extend from a rear surface of the face plate to the rear shell.
The sweet spot can be enlarged by increasing the distance between the center of gravity of the head and the face.

According to a fourth aspect of the present invention, there is provided the golf club according to the third aspect, wherein the weight is fixed to the rear shell, the weight can be firmly integrated, and the strength of the face can be increased. The hit feeling can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the first embodiment of the present invention.

FIG. 3 is a sectional view showing a first embodiment of the present invention.

FIG. 4 is a perspective view showing a second embodiment of the present invention.

[Explanation of symbols]

 3 face plate 4 hollow part 5 back shell 6 shaft 7 hosel (shaft mounting part) 10 rear surface 11 weight 17 24 hole 19 20 screw shaft 22 large diameter part

Claims (4)

(57) [Claims] 1. A golf club in which a shaft is connected to a golf club head having a shaft mounting portion on one side, a face plate on the front surface, and a rear shell provided through a hollow portion behind the face plate. A weight is provided in the hollow portion, a screw shaft having a tip screwed to the rear surface of the face plate is passed through a hole of the weight, and a large-diameter portion formed on the proximal end side of the screw shaft is formed in the rear shell. A golf club, wherein the golf club is passed through and fixed. 2. The golf club according to claim 1, wherein the weight is provided on both sides or one side of the toe side and the heel side of the face plate. 3. The golf club according to claim 2, wherein the weight is provided so as to substantially extend from a rear surface of the face plate to the rear shell. 4. The golf club according to claim 3, wherein said weight is fixed to said rear shell.