US20070037634A1

US20070037634A1 - Club head of a golf iron capable of changing its center of gravity

Info

Publication number: US20070037634A1
Application number: US11/202,170
Authority: US
Inventors: Li-Yang Lai
Original assignee: Shanghai Precision Tech Corp
Current assignee: Shanghai Precision Tech Corp
Priority date: 2005-08-12
Filing date: 2005-08-12
Publication date: 2007-02-15

Abstract

The present invention discloses a club head of a golf iron capable of changing its center of gravity, and the club head includes a groove disposed on a blade at the back of a striking surface, a lightweight specific gravity member installed in the groove, so that the groove and the specific gravity member are integrally combined by thermal pressing. The specific gravity member is provided for tuning the center of gravity of the club head of the golf iron so as to give a better stability of striking and controlling a golf ball, and achieve the effects of identifying and decorating the appearance of the club head of the golf iron.

Description

FIELD OF THE INVENTION

The present invention relates to a club head of a golf iron capable of changing its center of gravity, and more particularly to a club head of a golf iron that uses a specific gravity member to tune the center of gravity of the club head for a better stability of striking and controlling a golf ball as well as providing more changes to the appearance of the club head of the golf iron.

BACKGROUND OF THE INVENTION

As technology and science advances, tremendous convenience is brought to the economic transactions. The increase of national income also makes people to place more emphases on leisure activities. The golf game provides the leisure fitness effect as well as serving as a social activity. With the promotion and publicity made by the mass media, the golf game has attracted many players.
In a whole set of golf clubs, there are various club heads in different shapes and made of different materials to meet the requirements of striking a golf ball. Among these clubs, irons are provided for long-distance, mid-distance, and short-distance strikes. A prior art club head structure definitely can achieve the purpose of striking a golf ball, but those club heads usually come with thicker lower side, so that their center of gravity is at the central position of the lower side of the club head, and thus affecting the strikes of a golf ball to different extents according to the use of irons for different distances. For example, a longer rod body is needed for a long-distance strike, and the distance between the ball and the golf player will be farther. When a golf player strikes a golf ball, the striking surface of the club head is in contact with the ball. Since the striking force easily causes the upper end of the external side of the club head to be elevated backward, therefore the striking ball may deviate from its intended course. For a mid-distance strike, the striking point of a golf iron is precisely at the hollow groove holes at the back side of the club head to reduce the striking force. After the ball is struck, the distance will be shortened. For a short-distance strike, the control of striking the ball is more difficult, and thus the prior art club head embeds a specific gravity member into the club head for tuning the specific gravity and solving the foregoing problem. The position of the center of gravity of the club head should vary according to the player's habits of striking a golf ball.
Refer to FIG. 1 for the club head of a prior art golf iron which is a cast metal object, a specific gravity member (not shown in the figure) is embedded into the club head for adjusting the position of the center of gravity of the club head to achieve the effects of striking a ball to different distance by the golf iron, and providing stable and accurate strikes. However, the club head of the prior art iron still has the following shortcomings for its operations.
1. Since the specific gravity member is embedded into the club head of the golf iron, the position of the center of gravity of the iron club head cannot be varied according to the user's height, weight, or different wind speeds, ball controls and golf courses. Therefore, the scope of applicability is restricted.
2. The specific gravity member is embedded into the interior of the iron club head, and thus the appearance of the club head structure of the golf iron cannot be changed, thus the club head is monotonous. If a player needs to have a different-size golf iron, it is not easy for the player to identify the difference between the irons by the club heads.

SUMMARY OF THE INVENTION

In view of the foregoing shortcomings of the prior art, the inventor of the present invention overcomes the shortcomings by providing a club head of a golf iron that evacuates a groove from the blade at the back side of the striking surface of the club head and embeds a lightweight specific gravity member into the groove, so that the groove and the specific gravity member are integrally connected together by thermal pressing. The specific gravity member is used to tune the center of gravity of the club head of the golf iron, and provide stability for striking and controlling a golf ball, and also give more changes to the appearance of the club head of the golf iron for changing the center of gravity of the golf club of the golf iron.
To achieve the foregoing objective, the present invention provides a club head of a golf iron capable of changing its center of gravity that comprises a club head and a specific gravity member coupled with each other by thermal pressing, and evacuates a groove from a blade disposed at the back of a striking surface of the club head of the golf iron. The lightweight specific gravity member is installed into the groove, so that the specific gravity member and the groove are integrally coupled by thermal pressing.
In summation of the description above, the following effects can be improved.
1. The present invention connects different specific gravity members to the blade at the back of a striking surface of a club head of a golf iron by thermal pressing for tuning the position of the center of gravity of the club head of a golf iron. The center of gravity of the club head can be changed according to a user's height and weight or different wind speeds, ball controls and golf courses to provide a better stability for striking and controlling a golf ball.
2. The specific gravity member of the present invention is made by injection molding, or the specific gravity member is stuck onto a blade at the back of a striking surface of a club head of a golf iron after the injection molding so as to integrally combine the specific gravity member and the club head.
3. The present invention combines different specific gravity members into the groove at the blade at the back of the striking surface of the club head of the golf iron. The invention will not damage the club head structure of the golf iron, but can maintain the original strength of the club head of the golf iron.
4. The appearance of the specific gravity member of the invention can be changed, so that a different specific gravity member can go with a different club head of a golf iron. Thus, it is easy to distinguish a golf iron from the club head, and the invention also provides a more artistic appearance.
In summation of the description above, a specific gravity member of the invention is installed into the groove of the blade at the back of the striking surface of the club head of the golf iron by thermal pressing, injection molding, or gluing after the injection molding for tuning the center of gravity of the club head of the golf iron, as well as modifying the appearance of the club head of the golf iron.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a prior art golf club head;
FIG. 2 is an exploded view of the present invention;
FIG. 3A is a perspective view of the present invention;
FIG. 3B is a cross-sectional view of Section 3B-3B as depicted in FIG. 3A;
FIG. 3C is a cross-sectional view of Section 3C-3C as depicted in FIG. 3A;
FIG. 4 is a perspective view of a second preferred embodiment of the present invention;
FIG. 5 is a perspective view of a third preferred embodiment of the present invention; and
FIG. 6 is a perspective view of a fourth preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Refer to FIGS. 2, 3A, 3B and 3C for the club head of a golf iron capable of changing its center of gravity according to a preferred embodiment of the present invention. The club head structure 1 comprises a club head 10 and a specific gravity member 20 coupled with each other. Wherein the club head 10 includes a groove 111 disposed at a blade 110 at the back of a front side of a striking surface, and both ends of the groove 111 are aslant. The specific gravity member 20 has the same shape of the groove 111 of the blade 110 of the club head 10.
The specific gravity member 20 is combined with the groove 111 of the blade 110 of the club head 10 by thermal pressing, so that the specific gravity member 20 can be used for tuning the position of the center of gravity of the club head 10 of the golf iron.
The foregoing specific gravity member 20 is made of a lightweight plastic material as shown in the figure, or polyurethane elastomers (TPU), carbon fibers, or ethylene propylene dien monomers (EPDM). The specific gravity member 20 can be combined with the groove 111 of the blade 110 of the club head 10 by injection molding, or gluing after the injection molding for tuning the position of the center of gravity of the club head of the golf iron.
Refer to FIGS. 4, 5, 6 for the perspective views of the second, third and fourth preferred embodiments respectively.
The club heads 10 a, 10 b, 10 c of different golf irons may install different specific gravity members 20 a, 20 b, 20 c according to a user's height and weight, or different wind speeds, ball controls and golf courses. The club heads 10 a, 10 b, 10 c of the golf irons are installed respectively into the grooves 111 a, 111 b, 111 c a the blades 110 a, 110 b, 110 c corresponding to the back of the striking surface of the club heads 10 a, 10 b, 10 c of the golf irons by thermal pressing, injection molding, or gluing after the injection molding for tuning the position of the center of gravity of the club heads 10 a, 10 b, 10 c of the golf irons without losing the structural strength of the club heads 10 a, 10 b, 10 c of the golf irons.
The foregoing specific gravity members 20, 20 a, 20 b, 20 c go with different club heads 10, 10 a, 10 b, 10 c of the golf irons, so that users can easily distinguish the club heads 10, 10 a, 10 b, 10 c of the golf irons and conveniently select the desired club heads 10, 10 a, 10 b, 10 c of the golf irons, and the invention makes the overall appearance more artistic.
In summation of the description above, the present invention installs a specific gravity member 20, 20 a, 20 b, 20 c into a groove 111, 111 a, 111 b, 111 c at a blade 110, 110 a, 110 b, 110 c at the back of a striking surface of a club head 10, 10 a, 10 b, 10 c of a golf iron by thermal pressing, injection molding, or gluing after the injection molding for tuning the position of the center of gravity of the club head 10, 10 a, 10 b, 10 c of the golf iron as well as giving more changes to the appearance of the club head 10, 10 a, 10 b, 10 c of the golf iron. The invention improves the deficiencies of the club head of the prior art golf iron, so that a golf player can have better selections for striking and controlling the golf ball.

Claims

1. A club head of a golf iron capable of changing its center of gravity, comprising a groove disposed at a blade at the back of a striking surface of said club head, and a specific gravity member disposed into said groove and integrally coupled with said groove by thermal pressing, such that said specific gravity member is used for tuning the center of gravity of said club head of said golf iron to achieve a stability for striking and controlling a golf ball.

2. The club head of a golf iron capable of changing its center of gravity of claim 1, wherein said specific gravity member is made of a lightweight plastic material.

3. The club head of a golf iron capable of changing its center of gravity of claim 2, wherein said specific gravity member is made of polyurethane elastomers (TPU).

4. The club head of a golf iron capable of changing its center of gravity of claim 2, wherein said specific gravity member is made of carbon fibers.

5. The club head of a golf iron capable of changing its center of gravity of claim 2, wherein said specific gravity member is made of ethylene propylene dien monomers (EPDM).

6. The club head of a golf iron capable of changing its center of gravity of claim 1, wherein said specific gravity member is made by an injection molding and coupled with said groove of said club head of said golf iron.

7. The club head of a golf iron capable of changing its center of gravity of claim 6, wherein said specific gravity member is made of an injection molding and attached onto said groove of said club head of said golf iron.