FIELD OF THE INVENTION
[0001] The present invention relates to a golf club, and more particularly, to an integrally
formed golf club.
BACKGROUND OF THE INVENTION
[0002] Golf is a kind of attractive exercise because of its beautifully evergreen golf course,
which makes people feel just like wandering in nature. This gentle exercise, golf,
makes people feel relaxed, and it is the best exercise for friends social. Golf clubs
are classified and labeled with specified numbers for a golfer to choose from them
depending on different situations including gradient and wind direction. Golf clubs
are classified as driver golf clubs, iron golf clubs, and putter golf clubs. The driver
club, which is used for tee-off, usually has a big head and is weighted, so it is
usually difficult for a golfer to control not only in distance but in direction. Moreover,
the iron clubs, each having specific loft angle, are used for grounding on a green,
which need more control in direction than in distance. The putter clubs are specifically
designed in its weight steadiness in order for a golfer to putter the golf ball in
the hole on a green.
[0003] In general, each golf club comprises a golf shaft and a golf club head, wherein the
golf club head is generally made of stainless steel, metal alloy, or composite material
by processes of casting or injection molding. The material of golf shaft includes
carbon fiber and metal alloy. All of the above golf clubs are manufactured by fitting
the golf shaft to the club head and gluing on the connected portion. The strength,
hardness and toughness for golf club heads made of wood, carbon fiber, metal alloy
through process of hot-pressing or injection molding are comparatively weak as compared
with the golf club heads having the same thickness but made of metal alloy or stainless
steel.
[0004] DE 19545 199 A1 discloses a golf club comprising a golf club head, including a club head component
integrally formed with a golf shaft.
SUMMARY OF THE INVENTION
[0005] In order to increase the joining strength of the club head as being fitted with the
golf shaft, the connecting portion of the club head is made as stretching and tapering
upwardly as a cone. The fitting hole located within the center of the connecting portion
is made deeper as being located below the surface of the club head. In consideration
of the strength and the hardness of the connecting portion being weak, the connecting
portion between the golf club head and the golf shaft are wrapped by a synthetic thread
in order to increase the joining strength.
[0006] However, the joining strength between the golf club head and the golf shaft is determined
in accordance with joining strength of the connecting portion between. The different
materials of the golf club head, the golf shaft and the synthetic thread are chosen
to determine the hardness of elements really used. The connecting portion between
the golf club head and the golf shaft are connected with different applied forces,
so some partial areas of the connecting portion are loaded with a force of over-stress
concentration. Thus, when the golf club head is contact with a golf ball, the connection
portion is easily deformed, or even is fractured. As known from the above, the impact
force applies to the golf club head while a golf ball is hit, and is transferred as
a torsion force to the golf shaft. That torsion force will generate a torsion angle
between the golf shaft and the golf club head to affect the ball accuracy of flight
direction. Moreover, if the torsion force is too huge, the tight connection between
the golf club head and golf shaft becomes loosened, and the damage of golf club will
happen.
[0007] Therefore, the purpose of the present invention is to provide an integrally formed
golf club that eliminates the drawbacks of the aforesaid prior art golf club.
[0008] Therefore, the present invention provides an integrally formed golf club comprising
a golf club head and a golf shaft, wherein the golf club head including a club head
component formed by casting, the casted club head component having a club head surface
formed by forging, the golf shaft is formed by drawing the casted club head component
and is integrally formed with the casted club head component.
[0009] According to an embodiment of the present invention, a drawn portion is integrally
formed between the golf club head and the golf shaft to form a junctionless structure.
[0010] According to an embodiment of the present invention, the outer surface of the drawn
portion is smooth without roughness.
[0011] According to an embodiment of the present invention, the club head component of the
golf club head has a club head hollow portion, and the golf shaft has a shaft hollow
portion.
[0012] According to an embodiment of the present invention, the club head hollow portion
of the golf club head and the shaft hollow portion of the golf shaft are integrally
formed with each other.
[0013] According to an embodiment of the present invention, the club head component of the
golf club head has a club head hollow portion, and the golf shaft has a shaft solid
portion.
[0014] According to an embodiment of the present invention, the golf club head has a club
head surface whose roughness is different from that of the golf shaft surface.
[0015] According to an embodiment of the present invention, the golf shaft is integrally
formed with the golf club head by means of plangage butted drawing, single butted
drawing, double butted drawing, buldge butted drawing, or contracted butted drawing.
[0016] According to an embodiment of the present invention, the golf club head and the golf
shaft are made of a dual phase steel metal.
[0017] By means of technical means applied by the present invention, the golf club head
and the golf shaft are integrally formed by processes of casting, forging, and then
drawing, so the integrally formed golf club has characteristic of excellent distributed
strength. Therefore, the joining strength between the golf club head and the golf
shaft is greater than the conventional glued jointing structure. The integrally formed
golf club of the present invention overcomes the drawbacks of partial concentration
of applied force and prevents from being loosened in the joint portion that usually
happen in the conventional golf club. Therefore, the torsion force applied in the
golf club is uniformed contributed, and the life duration of the golf club is extended.
[0018] The integrally formed golf club of the present invention has not any joint portion.
It thus uniformly distributes the torsion force in the whole golf club including the
golf club head and the golf shaft, but not partially concentrates in the connecting
portion, i.e., the joint portion, as happened in the prior art. Moreover, since the
torsion angle generated in the golf club of the present invention is much less than
the conventional glue connected golf club, the accuracy of direction and the ability
of control is improved in the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The structure and the technical means adopted by the present invention to achieve
the above and other objects can be best understood by referring to the following detailed
description of the preferred embodiments and the accompanying drawings as follow.
Fig. 1 is a stereogram illustrating an integrally formed golf club of the first embodiment
according to the present invention;
Fig. 2 is a partial schematic diagram illustrating an integrally formed golf club
of the first embodiment according to the present invention;
Fig. 3 is a partial cross section diagram illustrating an integrally formed golf club
of the first embodiment according to the present invention; and
Fig. 4 is a partial cross section diagram illustrating an integrally formed golf club
of the second embodiment according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0020] Please refer to Figs. 1- 4. Fig. 1 is a stereogram illustrating an integrally formed
golf club according to the first embodiment of the present invention. Fig. 2 is a
partial schematic diagram illustrating an integrally formed golf club of the first
embodiment according to the present invention. Fig. 3 is a partial cross section diagram
illustrating an integrally formed golf club of the first embodiment according to the
present invention. Fig. 4 is a partial cross section diagram illustrating an integrally
formed golf club of the second embodiment according to the present invention.
[0021] As shown in Figs. 1-3, an integrally formed golf club 100 of the present invention
includes a golf club head 1 and a golf shaft 2. The golf club head 1 includes a club
head component 11 formed by casting, and the casted club head component 11 has a club
head surface 111 formed by forging. In this embodiment, the club head surface 111
is formed by treating the casted club head component 11 in a forging process. The
golf shaft 2 is formed by drawing the casted club head component 11, it thus the golf
shaft 2 is provided with a shaft component 21 integrally formed with the golf club
head 1. And a grip 211 is provided on the end of the shaft component 21.
[0022] A drawn portion 3 is provided between the golf club head 1 and the golf shaft 2,
and the outer surface of the drawn portion 3 is a smooth surface without roughness.
In this embodiment, the smooth surface is a junctionless smooth surface. In other
words, a drawn portion is integrally formed between the golf club head and the golf
shaft to form a junctionless structure. The outer surface of the golf shaft 2 is rougher
than the outer surface, such as a club head surface 111, of the golf club head 1.
In other embodiment, the outer surface of the golf club head and the golf shaft is
smooth without roughness. In this case, a separate shaft is covered on the golf shaft.
The club head surface 111 is used as a contact surface for hitting a golf ball. In
this embodiment, the club head component 11 of the golf club head 1 has a club head
hollow part 12, and the shaft component 21 of the golf shaft 2 has a shaft hollow
part 22. The club head hollow part 12 of the golf club head 1 and the shaft hollow
part 22 of the golf shaft 2 are hollow integrated with each other.
[0023] In this embodiment, the processes of drawing are described as follows: a blank of
the golf shaft 2, which is used for drawing, is connected with the casted forged golf
club head 1; a golf shaft 2 with a shaft hollow part 22 is formed by drawing the blank
of the golf shaft 2 to make the blank of the golf shaft 2 pass through a drawing mold
and a mandrel located in the center of the drawing mold.
[0024] In this embodiment, a weight member 13 is provided within the club head hollow part
12 during the manufacturing process, and the weight member 13 is positioned and closely
fixed within the club head component 11.
[0025] As shown in Fig. 4, in the second embodiment, it discloses an integrally formed golf
club 100a with different specifications and requirement. The manufacturing process
of the integrally formed golf club 100a is similar with the manufacturing process
of the integrally formed golf club 100. The integrally formed golf club 100a of the
second embodiment is different from the integrally formed golf club 100 of the first
embodiment in follows. The shaft component 21a of the golf shaft 2a is provided with
a shaft solid portion 22a. Specifically, during the process of drawing the golf shaft
2a, the blank of the golf shaft 2a passes through a drawing mold to form the shaft
hollow part 22a of the golf shaft 2a. However, the manufacturing process of the integrally
formed golf club 100a is similar with the manufacturing process of the integrally
formed golf club 100.
[0026] In the manufacturing process of integrally forming the integrally formed golf club
100, 100a, the club head component and the shaft component are formed by following
processes: casting, forging, and then drawing in sequence. The golf head and the shaft
are casted to be original objects, and then the club head surface of the golf head
is forged. Then the golf head and the shaft are processed by drawing to be integrally
formed. Depending on the shape and the size of the integrally formed golf club, the
drawing process can be classified into plangage butted (PG) drawing process, single
butted (SB) drawing process, double butted (DB) drawing process, buldge butted (BB)
drawing process, and contracted butted (CB) drawing process.
[0027] The drawing processes are different according to various sizes, shapes, and appearances
of the integrally formed golf club 100, 100a. For example, it only requires one step
to finish drawing for the integrally formed golf club if there is only size for the
outer diameter and thickness of the golf shaft, and then the plangage butted drawing
process is suitable for this. In the case that the integrally formed golf club is
one size in the outer diameter but has two sizes in its thickness (in general, the
thickness is not uniform), the single butted drawing process is applied then. During
the process of drawing, there are two processes required, including a process of "thickness
formation" and a process of "outer diameter molding". In other words, during the process
of drawing, the thickness of the golf shaft is firstly processed, and then outer diameter
of the golf shaft is processed, during which the double butted drawing process is
suitably applied. During the process of drawing, since the mandrels are different
from the front end to the back portion, the diameter of the golf shaft is thus enlarged
when the processing material is reversed, so the buldge butted drawing process is
suitable applied. And in the case that the integrally formed golf club is made with
the outer diameter of the golf shaft being partially reduced and the thickness being
with one size, the contracted butted drawing process is suitable applied.
[0028] Furthermore, in the present invention, the club head component and the shaft component
of the integrally formed golf club 100, 100a can be made of Duplex Stainless Steel
(DSS) such as stainless steel grades 2205, that contains 22% of Chromium (Cr) and
5% of Nickel (Ni). The Duplex Stainless Steel has the advantages of high strength,
excellent corrosion resistance, so it is suitable for manufacturing the integrally
formed golf club 100, 100a. The integrally formed golf club 100, 100a can be made
of other metal, such as stainless steel, chrome molybdenum steel, chrome-plated carbon
steel, and so on, and these are only a preferred embodiment but not limited.
[0029] The above description should be considered as only the discussion of the preferred
embodiments of the present invention. However, a person skilled in the art may make
various modifications to the present invention, within the scope defined by the appended
claims.
1. An integrally formed golf club (100), comprising:
a golf club head (1) including a club head component (11) formed by casting, the casted
club head component having a club head surface (111) formed by forging; and
a golf shaft (2) is formed by drawing the casted club head component (11), and is
integrally formed with the casted club head component (11).
2. The integrally formed golf club as claimed in claim 1, wherein a drawn portion (3)
is integrally formed between the golf club head (1) and the golf shaft (2) to form
a junctionless structure.
3. The integrally formed golf club as claimed in claim 2, wherein the outer surface of
the drawn portion (3) is smooth without roughness.
4. The integrally formed golf club as claimed in claim 1, wherein the club head component
(11) of the golf club head (1) has a club head hollow portion, and the golf shaft
(2) has a shaft hollow portion.
5. The integrally formed golf club as claimed in claim 4, wherein the club head hollow
portion of the golf club head (1) and the shaft hollow portion of the golf shaft (2)
are integrally formed with each other.
6. The integrally formed golf club as claimed in claim 1, wherein the club head component
(11) of the golf club head (1) has a club head hollow portion, and the golf shaft
(2) has a shaft solid portion.
7. The integrally formed golf club as claimed in claim 1, wherein the golf club head
(1) has a club head surface (111) whose roughness is different from that of the golf
shaft surface.
8. The integrally formed golf club as claimed in claim 1, wherein the golf shaft (2)
is integrally formed with the golf club head (1) by means of plangage butted drawing,
single butted drawing, double butted drawing, buldge butted drawing, or contracted
butted drawing.
9. The integrally formed golf club as claimed in claim 1, wherein the golf club head
(1) and the golf shaft (2) are made of a dual phase steel metal.
1. Integral gebildeter Golfschläger (100), umfassend:
einen Golfschlägerkopf (1), der eine durch Guss gebildete Schlägerkopfkomponente (11)
einschließt, wobei die gegossene Schlägerkopfkomponente eine durch Schmieden gebildete
Schlägerkopfoberfläche (111) aufweist; und
einen Golfschlägerschaft (2), der durch Ziehen der gegossenen Schlägerkopfkomponente
(11) gebildet ist und integral mit der gegossenen Schlägerkopfkomponente (11) gebildet
ist.
2. Integral gebildeter Golfschläger nach Anspruch 1, wobei ein gezogener Abschnitt (3)
integral zwischen dem Golfschlägerkopf (1) und dem Golfschlägerschaft (2) gebildet
ist, um eine nahtlose Struktur zu bilden.
3. Integral gebildeter Golfschläger nach Anspruch 2, wobei die Außenseite des gezogenen
Abschnitts (3) glatt und ohne Rauheit ist.
4. Integral gebildeter Golfschläger nach Anspruch 1, wobei die Schlägerkopfkomponente
(11) des Golfschlägerkopfes (1) einen Schlägerkopf-Hohlabschnitt aufweist und der
Golfschlägerschaft (2) einen Schaft-Hohlabschnitt aufweist.
5. Integral gebildeter Golfschläger nach Anspruch 4, wobei der Schlägerkopf-Hohlabschnitt
des Golfschlägerkopfes (1) und des Schaft-Hohlabschnitts des Golfschlägerschafts (2)
integral miteinander gebildet sind.
6. Integral gebildeter Golfschläger nach Anspruch 1, wobei die Schlägerkopfkomponente
(11) des Golfschlägerkopfes (1) einen Schlägerkopf-Hohlabschnitt aufweist und der
Golfschlägerschaft (2) einen Schaft-Massivabschnitt aufweist.
7. Integral gebildeter Golfschläger nach Anspruch 1, wobei der Golfschlägerkopf (1) eine
Schlägerkopfoberfläche (111) aufweist, deren Rauheit sich von derjenigen der Golfschläger-Schaftoberfläche
unterscheidet.
8. Integral gebildeter Golfschläger nach Anspruch 1, wobei der Golfschlägerschaft (2)
integral mit dem Golfschlägerkopf (1) mittels Plangage-konifiziertem Ziehen, einseitig
konifiziertem Ziehen, doppelseitig konifiziertem Ziehen, asymmetrisch doppelseitig
konifiziertem Ziehen oder kontrahiertem konifiziertem Ziehen gebildet ist.
9. Integral gebildeter Golfschläger nach Anspruch 1, wobei der Golfschlägerkopf (1) und
der Golfschlägerschaft (2) aus Dualphasenstahlmetall hergestellt sind.
1. Club de golf formé d'un seul tenant (100), comprenant:
une tête (1) de club de golf comportant un composant (11) de tête de club formé par
moulage, le composant de tête de club moulé ayant une surface (111) de tête de club
formée par forgeage; et
un manche (2) de club de golf est formé en étirant le composant (11) de tête de club
moulé, et formé d'un seul tenant avec le composant (11) de tête de club moulé.
2. Club de golf formé d'un seul tenant selon la revendication 1, dans lequel une partie
étirée (3) est formée d'une seul tenant entre la tête (1) du club de golf et le manche
(2) du club de golf pour former une structure sans jonctions.
3. Club de golf formé d'un seul tenant selon la revendication 2, dans lequel la surface
extérieure de la portion étirée (3) est lisse et sans rugosité.
4. Club de golf formé d'un seul tenant selon la revendication 1, dans lequel le composant
(11) de tête de club de la tête (1) du club de golf a une partie creuse de tête de
club, et dans lequel le manche (2) de club de golf comporte une partie de manche creuse.
5. Club de golf formé d'un seul tenant selon la revendication 4, dans lequel la partie
creuse de tête du club de la tête (1) du club de golf et la partie creuse de manche
du manche (2) de club de golf sont formées d'un seul tenant l'une avec l'autre.
6. Club de golf formé d'un seul tenant selon la revendication 1, dans lequel le composant
(11) de tête de club de golf de la tête (1) de club de golf a une partie creuse de
tête de club, et le manche (2) de club de golf a une partie de manche pleine.
7. Club de golf formé d'un seul tenant selon la revendication 1, dans lequel la tête
(1) de club de golf a une surface (111) de tête de club dont la rugosité est différente
de celle de la surface du manche de club de golf.
8. Club de golf formé d'un seul tenant selon la revendication 1, dans lequel le manche
(2) de club de golf est formé d'un seul tenant avec la tête (1) de club de golf au
moyen d'un étirage à renfort par plangage, d'un étirage à simple renfort, d'un étirage
à double renfort, d'un étirage à renfort à renflement, ou d'un étirage à renfort contracté.
9. Club de golf formé d'un seul tenant selon la revendication 1, dans lequel la tête
(1) de club de golf et le manche (2) de club de golf sont fabriqués en acier à double
phase.