Golf club head
View Patent ↗A golf club head 2 includes a face line 8 having a depth of D 1 (mm) and a land area LA. When a boundary point between the land area LA and the face line 8 in a section line of a surface of the face line 8 is defined as Pa; a point of which a depth is T 1 (mm) is defined as Pb; and a curvature radius of the section line between the point Pa and the point Pb is defined as R 1 (mm), the golf club head 2 satisfies the following formulae (1) and (2): R1>T1 (1) 0.10≦T1≦0.5 (2) Preferably, a ratio (R 1 /T 1 ) is greater than 1.0 and is equal to or less than 3.0.
1. A golf club head comprising:
a face line having a depth of D 1 (mm); and
a land area,
wherein if a boundary point between the land area and the face line in a section line of a surface of the face line is defined as Pa; a point of which a depth is T 1 (mm) in the section line is defined as Pb; and a curvature radius of the section line between the point Pa and the point Pb is defined as R 1 (mm), the golf club head satisfies the following formulae (1) and (2):
R1>T1 (1)
0.10≦T1≦0.5 (2)
and wherein if a bottom face width of the face line is defined as W 2 (mm), the width W 2 is 0.2 (mm) or greater and 0.7 (mm) or less.
2. The golf club head according to claim 1 , wherein a ratio (R 1 /T 1 ) is greater than 1.0 and is equal to or less than 3.0.
3. The golf club head according to claim 1 ,
wherein if a face line width measured by 30 degree method of measurement is defined as W 1 (mm) and a bottom face width of the face line is defined as W 2 (mm), a ratio (Wl/W 2 ) is 1.5 or greater and 3.0 or less.
4. The golf club head according to claim 1 , wherein if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
the curvature radius r 1 is smaller than the curvature radius R 1 .
5. The golf club head according to claim 1 , if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
wherein the curvature radius R 1 is constant and the curvature radius r 1 is constant.
6. The golf club head according to claim 1 , if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
wherein a side face of the face line is occupied by only a first portion having the curvature radius R 1 and a second portion having the curvature radius r 1 .
7. The golf club head according to claim 1 , wherein the face line is formed by a cutting process using a cutter.
8. The golf club head according to claim 1 , wherein the curvature radius R 1 is equal to or less than 0.80 (mm).
9. The golf club head according to claim 1 , wherein if a face line width measured by a 30 degree method of measurement is defined as W 1 (mm), the width W 1 is 0.4 (mm) or greater and 0.9 (mm) or less.
10. The golf club head according to claim 1 ,
wherein if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to the point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
the curvature radius r 1 is 0.02 (mm) or greater and 0.15 (mm) or less.
11. A golf club head comprising:
a face line having a depth of D 1 (mm); and
a land area,
wherein if a boundary point between the land area and the face line in a section line of a surface of the face line is defined as Pa; a point of which a depth is T 1 (mm) in the section line is defined as Pb; and a curvature radius of the section line between the point Pa and the point Pb is defined as R 1 (mm), the golf club head satisfies the following formulae (1) and (2):
R1>T1 (1)
0.10≦T1≦0.5 (2)
wherein if a face line width measured by 30 degree method of measurement is defined as W 1 (mm) and a bottom face width of the face line is defined as W 2 (mm), a ratio (W 1 /W 2 ) is 1.5 or greater and 3.0 or less.
12. The golf club head according to claim 11 , wherein a ratio (R 1 /T 1 ) is greater than 1.0 and is equal to or less than 3.0.
13. The golf club head according to claim 11 , wherein if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
the curvature radius r 1 is smaller than the curvature radius R 1 .
14. The golf club head according to claim 11 , if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd.,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
wherein a side face of the face line is occupied by only a first portion having the curvature radius R 1 and a second portion having the curvature radius r 1 .
15. The golf club head according to claim 11 , wherein the face line is formed by a cutting process using a cutter.
16. The golf club head according to claim 11 , wherein if a face line width measured by a 30 degree method of measurement is defined as W 1 (mm), the width W 1 is 0.4 (mm) or greater and 0.9 (mm) or less.
17. A golf club head comprising:
a face line having a depth of D 1 (mm); and
a land area,
wherein if a boundary point between the land area and the face line in a section line of a surface of the face line is defined as Pa; a point of which a depth is T 1 (mm) in the section line is defined as Pb; and a curvature radius of the section line between the point Pa and the point Pb is defined as R 1 (mm), the golf club head satisfies the following formulae (1) and (2):
R1>T1 (1)
0.10≦T1≦0.5 (2)
wherein if a point at a height H 1 (mm) from a bottom face of the face line that is in a section line of a surface of the face line is defined as Pc, and an intersection point of a side face of the face line and the bottom face of the face line is defined as Pd,
the point Pc coincides with the point Pb, or is located on a bottom face side with respect to the point Pb;
a roundness having a curvature radius of r 1 (mm) and projecting toward the outside of the face line is present between the point Pc and the point Pd; and
the curvature radius r 1 is 0.02 (mm) or greater and 0.15 (mm) or less.
18. The golf club head according to claim 17 , wherein the curvature radius rl is smaller than the curvature radius R 1 .
19. The golf club head according to claim 17 , wherein a side face of the face line is occupied by only a first portion having the curvature radius R 1 and a second portion having the curvature radius r 1 .
20. The golf club head according to claim 17 , wherein the curvature radius R 1 is equal to or less than 0.80 (mm).