Iron clud head
An iron club head includes a striking plate for striking a golf ball and a body. The body includes an elastically deformable thin wall. An opening is defined in a front side of the body and surrounded by the thin wall. The striking plate is bonded in the opening. The thin wall has a thickness smaller than that of the striking plate. When the iron club head hits a golf ball, a momentum of striking generated as a result of hitting the golf ball causes elastic deformation of the striking plate and the thin wall to increase an overall deformation of the iron club head.
1. Field of the Invention
The present invention relates to an iron club head. In particular, the present invention relates to an iron club head including a body and a striking plate having a thickness greater than that of the body to improve the overall elastic deforming capacity of the iron club head.
2. Description of Related Art
In the typical conventional iron club head, the thickness of the annular wall 101 of the body is larger than 3 mm, while the thickness of the striking plate 2 is smaller than 3 mm. The body 1 is generally made from a material having a high Young's modulus while considering the overall strength of the iron club head. Nevertheless, the elastic deforming capacity of the body 1 is reduced when the body 1 has a relatively large thickness or the body 1 is made of a material with a relatively high Young's modulus. The coefficient of restitution of the body 1 is thus adversely affected. The coefficient of restitution of the conventional iron club head is between 0.74 and 0.76. Conclusively, the overall elastic deforming capacity of the iron club head is in proportion with thin thickness and low Young's modulus of the striking plate 2.
The body 1 could become a sort of a damper due to low elastic deforming capacity, absorbing part of the momentum and reducing the overall striking effect. On the other hand, the striking plate 2 bonded to the stepped portion 103 is surrounded by the annular wall 101. Thus, the elastic deforming area of the striking plate 2 cannot be effectively expanded.
OBJECTS OF THE INVENTIONAn object of the present invention is to provide an iron club head including a body and a striking plate having a thickness greater than that of the body to improve the overall elastic deforming capacity of the iron club head.
SUMMARY OF THE INVENTIONIn accordance with an aspect of the present invention, an iron club head includes a striking plate for striking a golf ball and a body. The body includes an elastically deformable thin wall. An opening is defined in a front side of the body and surrounded by the thin wall. The striking plate is bonded in the opening. The thin wall has a thickness smaller than that of the striking plate.
When the iron club head hits a golf ball, a momentum of striking generated as a result of hitting the golf ball causes elastic deformation of the striking plate and the thin wall to increase an overall deformation of the iron club head.
The thickness of the thin wall is preferably between 0.5 mm and 2.0 mm. Thickness of the striking plate is preferably between 2.0 mm and 3.5 mm.
In an embodiment of the invention, a weight member is fixed to an inner face of the thin wall at a position behind a lower portion of the striking plate. In another embodiment of the invention, a weight member is integrally formed on an inner face of the thin wall at a position behind a lower portion of the striking plate. A weight ratio of the body and the weight member is preferably smaller than 5.5.
In an embodiment of the invention, the thin wall has a closed rear side. In another embodiment of the invention, the thin wall has a rear side, and the rear side of the thin wall having an opening in an upper section thereof.
Other objects, advantages and novel features of this invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to
Referring to
The weight member 3 is made from a metal with a relatively high specific gravity, such as a W—Fe—Ni alloy. The weight member 3 is fixed by welding or embedding to an inner face of the thin wall 11 at a position behind a lower portion of the striking plate 2. The weight member 3 compensates the weight reduction resulting from the use of the elastically deformable thin wall 11. Further, the weight member 3 can be used to adjust the overall weight of the iron club head. Preferably, the weight ratio of the body 1 to the weight member 3 is smaller than 5.5.
The body 1 of the iron club head thus constructed can be deemed as a spring that follows the Hook's Law. Namely, when the iron club head hits a golf ball, the body 1 is compressed and flexes like a spring, storing the kinetic energy of the swing. When the golf ball is leaving away from the iron club head, the energy stored in the body 1 is imparted to the golf ball, resulting in a farther flight of the golf ball. The coefficient of restitution of the iron club head in accordance with the present invention is between 0.77 and 0.83.
Referring to
While the principles of this invention have been disclosed in connection with specific embodiments, it should be understood by those skilled in the art that these descriptions are not intended to limit the scope of the invention, and that any modification and variation without departing the spirit of the invention is intended to be covered by the scope of this invention defined only by the appended claims.
Claims
1. An iron club head comprising:
- a striking plate adapted to strike a golf ball; and
- a body including an elastically deformable thin wall, an opening being defined in a front side of the body and surrounded by the thin wall, the striking plate being bonded in the opening;
- wherein the thin wall has a thickness smaller than that of the striking plate; and
- wherein when the iron club head hits a golf ball, a momentum of striking generated as a result of hitting the golf ball causes elastic deformation of the striking plate and the thin wall to increase an overall deformation of the iron club head.
2. The iron club head as claimed in claim 1, wherein the thickness of the thin wall is between 0.5 mm and 2.0 mm.
3. The iron club head as claimed in claim 1, wherein the thickness of the striking plate is between 2.0 mm and 3.5 mm.
4. The iron club head as claimed in claim 1, wherein the iron club head further comprises a weight member fixed to an inner face of the thin wall at a position behind a lower portion of the striking plate.
5. The iron club head as claimed in claim 4, wherein a weight ratio of the body and the weight member is smaller than 5.5.
6. The iron club head as claimed in claim 1, wherein the iron club head further comprises a weight member integrally formed on an inner face of the thin wall at a position behind a lower portion of the striking plate.
7. The iron club head as claimed in claim 6, wherein a weight ratio of the body and the weight member is smaller than 5.5.
8. The iron club head as claimed in claim 1, wherein the thin wall has a closed rear side.
9. The iron club head as claimed in claim 1, wherein the thin wall has a rear side, the rear side of the thin wall having an opening in an upper section thereof.
Type: Application
Filed: May 14, 2004
Publication Date: Nov 17, 2005
Inventor: Chung-Yung Huang (Kaohsiung Hsien)
Application Number: 10/845,105