JP3019134B2 - Wood golf club set - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club set made of wood.

[0002]

2. Description of the Related Art In recent years, golf club heads referred to as wood have been replaced with natural woods such as persimmons and cherry blossoms from the viewpoint of quality stability and ease of material supply. Hollow metal wood molded from a metal such as an aluminum alloy or a material filled with a core material made of a foamed synthetic resin such as polyurethane.The outer shell of the head body is made of a fiber reinforced resin such as carbon fiber or glass fiber. Molding,
Carbon wood or the like in which a core material made of a foamed synthetic resin is similarly filled is widely used.

[0003] Conventionally, in this type of wood golf club set, the outer shape of the head main body is formed smaller as the count increases, and the weight is sequentially increased. That is, since the driver (W # 1) is usually used exclusively for securing the flight distance and the accuracy of the hit ball is not so required, the head body has the largest outer shape and the longest shaft in the set. However, as the ball count rises, the accuracy of the hit ball is required.

Conventionally, therefore, the loft angle is increased by lowering the height of the face portion as the count increases, and the size of the sole portion (dimension between the toe side and the heel side and between the face side and the back side). And the outer shape of the head body is made small. Thus, when the height of the face portion is sequentially reduced and the loft angle is increased, the center of gravity of the head body is lowered and the hit ball is easily lifted, so that the accuracy of the hit ball is increased, and the sole portion is reduced. As a result, the swing-out becomes good and the accuracy of the hit ball increases, and as a result, the head body is formed smaller as the ball count increases.

On the other hand, as described above, in this type of golf club set, the weight of the head body is made heavier as the count increases, but generally, the shorter the shaft, the more accurate the hit ball. For this reason, conventionally, the shaft is formed shorter as the count increases, and the accuracy of the hit ball is increased. However, if the length of the shaft differs from count to count, the swing balance changes.

In order to adjust the swing balance,
As the count increases, the weight of the head body is made heavier, and usually, in a metal wood golf club set, the sole portion integrally formed as the outer shell of the head body increases as the count increases. In the case of a carbon wood set, the outer shell of the head main body is sequentially formed to have a thicker wall thickness to adjust the swing balance.

[0007]

However, if the thickness of the outer shell (the sole portion or the entire outer shell) is different for each count, the sound quality of the hitting sound is different for each golf club, and the uniformity of the set is unified. However, a problem such as damage to the device has been pointed out. In addition, as shown in FIG.
A resin layer 2 is provided on the inner surface of the golf club head, a cavity 3 surrounded by the resin layer 2 is formed inside the head main body 1, and the shape and size (cavity) of the cavity 3 for each individual golf club head are formed. Japanese Patent Application Laid-Open No. HEI 6-19909 discloses a conventional example in which the sound quality of the hit ball sound as a set is made substantially the same by adjusting the
No. 0 discloses this.

According to the above conventional example, the sound quality of the hitting sound of each golf club head can be made substantially the same by adjusting the shape and size of the hollow portion 3 surrounded by the resin layer 2. Although it is possible, in such a conventional example, the impact at the time of hitting the ball causes the resin layer 2 to collapse from the cavity 3 side and start peeling off. It has been pointed out that even if they are almost the same, the sound quality gradually changes over a long period of use and the uniformity of the set is impaired.

The disadvantage is that the sound quality changes remarkably because the resin layer 2 peels off with a larger surface area as the golf club head has a larger hollow portion 3. The present invention has been devised in view of the above circumstances, and ensures uniformity as a set by making the sound quality of a golf club head at the time of hitting a ball substantially the same, and also causes a change in sound quality due to use. It is an object of the present invention to provide a golf club set made of wood without the above.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, the outer shell of the head main body is sequentially formed to be thicker as the count increases, and a core material is provided inside the outer shell. In the wood golf club set, the core material is formed of a low specific gravity material having a specific gravity of 0.5 or less, and the specific gravity of the core material is gradually reduced as the count increases.

The invention according to claim 2 is based on claim 1
In the wood golf club set described in the above, the core material is composed of a plurality of members. The invention according to a third aspect is the wood golf club set according to the second aspect, wherein the core material is an outer layer. And an inner layer portion having a lower specific gravity than that, and the ratio of the inner layer portion increases as the count increases.

[0012]

When the ball is hit with a golf club equipped with the golf club head according to each claim, the outer shell is filled with a core material having a specific gravity of 0.5 or less.
The weight of the head body is dispersed at the peripheral edge to obtain a large moment of inertia, and the ball flies in a good direction.

[0013] Vibration and impact due to the impact are generated in the head body. Such vibration and impact are absorbed by the core material and vibration and impact transmitted to the shaft are reduced. Further, as in the case of the conventional wood, the swing balance is adjusted as the count increases, so that the center of gravity of the head body lowers and the hit ball increases each time the count increases, and the accuracy of the hit ball increases.

Further, each core material having a different specific gravity filled for each head body makes the sound quality of the hitting sound of the golf club head as a set substantially the same. In the invention according to claim 3, since the outer layer having a higher specific gravity than the inner layer is arranged along the outer shell, the outer layer imparts a larger moment of inertia to the head body when hitting a ball. Will be done.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1 to 4 show a wood golf club set according to an embodiment of the present invention.
1) and 3rd wood (W♯3) and 5th wood (W
# 5) shows a cross-sectional view of each head main body,
In each of Nos. 6 to 6, the outer shells 7 to 9 are hollowly formed of a metal such as stainless steel or an aluminum alloy.

As in the case of the conventional metal wood, the head bodies 4 to 6 are formed to have smaller outer shapes as the count increases from the driver, so that the loft angles of the face portions 10 to 12 are sequentially set to be larger and the sole portions 13 to 12 are set. 15 thickness t ₄ ~t ₆ are sequentially formed thick, the weight of the head body 4-6 is formed so as to be heavy for each count increases.

On the heel side of each of the head bodies 4 to 6,
Each of the hosel portions 16 to 18 projecting obliquely upward is formed.
Shafts 19-formed sequentially as the count increases
21 is inserted. The outer shells 7 to 9 of the head main bodies 4 to 6 are filled with cores 22 to 24 made of a low specific gravity material having a specific gravity of 0.5 or less without gaps. The specific gravity gradually decreases as the driver counts up.

Conventionally, since the core material to be filled in the wood head body is often made of a foamed synthetic resin having a specific gravity of about 0.5, the specific gravity of the core materials 22 to 24 is numerically limited to 0.5 as described above. . The materials of the cores 22 to 24 used in this embodiment are foamed synthetic resins or synthetic resins mixed with micro hollow bodies. Examples of foamed synthetic resins include polyurethane, polystyrene, epoxy, acrylic, and vinyl chloride. , ABS, EVA
The resin mixed with the micro hollow body is used to disperse and solidify the micro hollow body made of glass, phenol resin, epoxy resin, etc. in thermosetting resin such as epoxy resin and unsaturated polyester resin. A cellular foam material or the like is used.

Since these materials have different specific gravity values, the core material 2 is changed by changing the material to be filled in the outer shells 7 to 9.
The specific gravity of 2 to 24 can be changed, and various specific gravities can be obtained by changing the foaming state of the same resin, the amount of the minute hollow body mixed, and the like.
Which of these means is adopted to change the specific gravity of 24 is arbitrary and may be appropriately selected.

Since the present embodiment is constructed as described above, when a golf club with each of the head bodies 4 to 6 hits a ball, the outer shells 7 to 9 have cores 22 to 22 having a specific gravity of 0.5 or less. 24, the weights of the head bodies 4 to 6 are dispersed to the peripheral portions (the outer shells 7 to 9) to obtain a large moment of inertia, and the ball flies in a good direction, as in the related art. Become.

Then, vibrations and impacts due to the impact are generated in the head main bodies 4 to 6.
The vibrations and shocks absorbed by the shaft 24 and transmitted to the shafts 19 to 21 are reduced. Also, as described above, in the present embodiment, similarly to the conventional metal wood, the loft angles of the face portions 10 to 12 of the head bodies 4 to 6 are increased as the count increases, and the outer shapes of the head bodies 4 to 6 are increased. together with smaller form, the shaft 19 to 21 short form, correspondingly, since the aim to adjust the swing balance by sequentially forming a thick wall thickness t ₄ ~t ₆ of the sole portion 13 to 15, increases count Every time the center of gravity of the head body 4-6 goes down and the hit ball goes up,
The accuracy of the hit ball is increased.

Further, in the conventional example shown in FIG. 9, the sound quality of the hitting sound as a golf club set is made substantially the same by adjusting the shape and the hollow ratio of the hollow portion 3 provided inside the head main body 1. In the embodiment, the core materials 22 to 24 filled with different specific gravities for each of the head bodies 4 to 6 make the sound quality of the hitting sound of the golf club head as a set substantially the same.

Therefore, according to this embodiment, a large moment of inertia is obtained at the time of hitting the ball, and the ball flies in a good direction. In addition, vibration and impact due to hitting are reduced by the core members 22 to 24, and the shafts 19 to 24 are reduced. This has the effect of reducing the vibration and impact transmitted to 21 and increasing the accuracy of the hit ball as the ball count increases. Further, according to the present embodiment, in addition to the above-described effects, the sound quality of the hitting sound of the golf club head as a set can be made substantially the same, and the resin layer 2 can be separated from the structure as shown in FIG. Since there is no room for such a phenomenon to occur, there is no danger that the sound quality will gradually change over a long period of use and the uniformity of the set will be impaired.

Further, since the specific gravity can be adjusted by changing the material used for the core members 22 to 24 or by changing the foaming state of the same resin or the mixing amount of the minute hollow body, the specific gravity of the core members 22 to 24 is also extremely adjusted. It has the advantage of being easy. FIGS. 5 to 8 show one embodiment of the wood golf club set according to the first to third embodiments.
1) and 3rd wood (W♯3) and 5th wood (W
♯5) shows a cross-sectional view of each head body, and shows each head body 2
The outer shells 28 to 30 of 5 to 27 are each formed of a fiber reinforced resin such as carbon fiber or glass fiber so as to be hollow.

As in the case of the conventional carbon wood, the head bodies 25 to 27 are formed such that the outer shape is formed smaller each time the count is increased from the driver, the loft angles of the face portions 31 to 33 are sequentially set to be larger, and the outer shell is formed. The total thickness of the heads 28 to 30 is sequentially increased, and the weights of the head main bodies 25 to 27 are set to increase as the count increases.

On the heel side of each of the head bodies 25 to 27, hosel parts 34 to 36 projecting obliquely upward are formed, respectively. The inserted shafts 37 to 39 are inserted. The outer shells 28 to 30 of the head bodies 25 to 27 are filled with cores 40 to 42 having a specific gravity of 0.5 or less, as in the above embodiment.
42 are outer layer portions 40a to 42a and inner layer portions 40b to 42 surrounded by the outer layer portions 40a to 42a and having a lower specific gravity than the outer layer portions 40a to 42a.
b.

Thus, the core member 40 used in this embodiment is
Materials 42 to 42 also use the same foamed synthetic resin as in the above embodiment or a synthetic resin mixed with a minute hollow body. As described above, since these materials have different specific gravities, different materials are combined to form the outer layer portions 40a to 42a and the inner layer portion 40b.
-42b may be formed, and the specific gravity can be varied by changing the foaming state of the same resin and the mixing amount of the minute hollow body. The outer layer portions 40a to 42a and the inner layer portion 40
b to 42b may be formed, and the selection is arbitrary.

Then, as shown in FIG.
2 is the outer layer portion 40a as the count increases from the driver.
The ratio of the inner layer portions 40b to 42b to the inner layer portions 40b to 42b is increased, and by thus sequentially increasing the ratio of the inner layer portions 40b to 42b, the core material 40 The specific gravity of 42 is sequentially reduced.

Since the present embodiment is constructed as described above, when hitting a ball with a golf club to which each of the head bodies 25 to 27 is mounted, similarly to the above embodiment, the outer shells 28 to 3 are formed.
Small core material 40 to 4 with a specific gravity of 0.5 or less within 0
Since the ball 2 is filled, the weights of the head main bodies 25 to 27 are dispersed at the peripheral portions (the outer shells 28 to 30) to obtain a large moment of inertia, and the ball flies in a good direction. At this time, vibrations and impacts due to the impact are generated in the head main bodies 25 to 27. The cores 40 to 42 absorb such vibrations and impacts to reduce the vibrations and impacts transmitted to the shafts 37 to 39. Become.

Also, in this embodiment, the shape of the head bodies 25 to 27 is reduced while the loft angles of the face portions 31 to 33 of the head bodies 25 to 27 are increased as the count increases, and the shaft 37 To 39 are formed short, and the outer shells 28 to 30 are formed to have a correspondingly large thickness in order to adjust the swing balance. Therefore, the center of gravity of the head main bodies 25 to 27 decreases as the count increases. The hit ball rises, and the accuracy of the hit ball increases.

Further, each of the core materials 40 to 42 having different specific gravities.
However, the sound quality of the hitting sound of the golf club head as a set is substantially the same. Therefore, also in this embodiment, similarly to the above embodiment, a large moment of inertia is obtained at the time of hitting the ball, and the ball flies in a good direction, and the vibration and impact due to the impact are reduced by the core members 40 to 42, so that the shaft is reduced. The vibrations and shocks transmitted to 37 to 39 are reduced, and the accuracy of the hit ball is increased as the ball count increases. However, in the present embodiment, as compared with the above embodiment, the inner layer portion 40b is provided.
Since the outer layer portions 40a to 42a having a larger specific gravity than that of the core members 40 to 42b are arranged along the outer shells 28 to 30,
A larger moment of inertia can be obtained as compared with the above-described embodiment in which the balls 42 are uniformly filled, and as a result, the ball can be more directionally blown.

Further, in this embodiment, in addition to the above-mentioned effects, it is possible to make the sound quality of the hitting sound of each of the head bodies 25 to 27 substantially the same, and in addition to the structure, as shown in FIG. Since there is no room for a phenomenon such as separation of the layer 2 to occur, there is no danger that the sound quality will gradually change over a long period of use and the uniformity of the set will be impaired. The specific gravity can be adjusted by changing the material used for the inner layer portions 40b to 42b and the outer layer portions 40a to 42a, or by changing the foaming state of the same resin, the mixing amount of the minute hollow body, and the like.
There is an advantage that the specific gravity adjustment of 0 to 42 is extremely easy.

Generally, this type of golf club set includes a driver (W # 1) and a third wood (W # 3),
It is made up of four golf clubs, a number wood (W $ 4) and a number 5 wood (W $ 5).
There is also a golf club set that consists of 1), 3 woods (W $ 3) and 5 woods (W $ 5).
The present invention can be applied to such a golf club set made of wood.

[0034]

As described above, according to the wood golf club set of each claim, a large moment of inertia is obtained at the time of hitting the ball, and the ball flies in a good direction.
In addition, vibration and impact due to impact are reduced by the core material, so that vibration and impact transmitted to the shaft are reduced, and the accuracy of the hit ball increases as the ball count increases.

Further, according to the present invention, the sound quality of the hitting sound of the golf club head can be made substantially the same, and the sound quality gradually changes over a long period of use to form a set. There is no danger that uniformity will be lost. Further, for example, when a synthetic resin in which a foam synthetic resin or a minute hollow body is mixed in the material of the core material is used, the resin material used for the core material is changed, the foaming state of the same resin, the mixing amount of the minute hollow body, and the like. There is an advantage that the specific gravity of the core material can be adjusted very easily, for example, the specific gravity can be adjusted by changing.

According to the third aspect of the present invention, in addition to the above-described effects, the outer layer having a higher specific gravity than the inner layer is arranged along the outer shell of the head main body, so that a larger moment of inertia can be achieved when the ball is hit. This has the effect of allowing the ball to fly more directionally.

[Brief description of the drawings]

FIG. 1 is a sectional view of a driver in an embodiment of a wood golf club set according to the first embodiment.

FIG. 2 is a sectional view of a driver.

FIG. 3 is a sectional view of a third wood in one embodiment of the golf club set according to the first embodiment;

FIG. 4 is a sectional view of a fifth wood in one embodiment of the golf club set according to claim 1;

FIG. 5 is a cross-sectional view of a driver in one embodiment of the wood golf club set according to claims 1 to 3;

FIG. 6 is a sectional view of a driver.

FIG. 7 is a cross-sectional view of the third wood in one embodiment of the golf club set according to claims 1 to 3;

FIG. 8 is a cross-sectional view of a fifth wood in one embodiment of the golf club set according to claims 1 to 3;

FIG. 9 is a cross-sectional view of a conventional golf club head.

[Explanation of symbols]

 4,5,6,25,26,27 Head body 7,8,9,28,29,30 Outer shell 10,11,12,31,32,33 Face part 13,14,15 Sole part 16,17, 18, 34, 35, 36 hosel part 19, 20, 21, 37, 38, 39 shaft 22, 23, 24, 40, 41, 42 core material 40a, 41a, 42a outer layer part 40b, 41b, 42b inner layer part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A63B 53/00 A63B 53/04

Claims (3)

(57) [Claims] 1. A wood golf club set in which the outer shell of a head main body is sequentially formed to have a larger thickness as the count increases, and a core material is filled in the outer shell, the core material having a specific gravity of 0. A wood golf club set formed by molding with a low specific gravity material of 5 or less and sequentially decreasing the specific gravity of the core material as the count increases. 2. The wood golf club set according to claim 1, wherein the core comprises a plurality of members. 3. The wood golf club set according to claim 2, wherein the core comprises an outer layer portion and an inner layer portion having a lower specific gravity than the outer layer portion, and the ratio of the inner layer portion increases as the count increases.