Golf club head
A golf club head of the present invention includes a face. The face has a score line groove, a fine groove, and a land area. A depth of the fine groove is 0.01 mm or greater and less than 0.03 mm. A width of the fine groove is 0.1 mm or greater and 0.3 mm or less. A pitch of the fine groove is 0.3 mm or greater and 0.7 mm or less. Preferably, the face further has a protruding part protruding beyond the land area. Preferably, the protruding part is provided on a top blade side of the fine groove. Preferably, the protruding part extends along the fine groove.
1. A golf club head comprising a face, wherein
the face has a score line groove, a fine groove, and a land area;
a depth of the fine groove is 0.01 mm or greater and less than 0.03 mm;
a width of the fine groove is 0.1 mm or greater and 0.3 mm or less:
a pitch of the fine groove is 0.3 mm or greater and 0.7 mm or less;
the face has a protruding part protruding beyond the land area; and
the pitch of the fine groove is 1.5 times or greater the width of the fine groove and 5 times or less the width of the fine groove.
2. The golf club head according to claim 1 , wherein
the protruding part is provided on a top blade side of the fine groove; and
the protruding part extends along the fine groove.
3. The golf club head according to claim 2 , wherein a height of the protruding part is 0.001 mm or greater and 0.02 mm or less.
4. The golf club head according to claim 2 , wherein the protruding part is adjacent to the fine groove.
5. The golf club head according to claim 2 , wherein the protruding part is provided only on the top blade side of the fine groove.
6. The golf club head according to claim 5 , wherein the golf club head is manufactured by a manufacturing method comprising the steps of:
making a fluid dissolved by irradiation of the laser flow by gravity while irradiating the face with the laser in a state where the face is inclined so that a sole surface side of the face is located above the top blade side; and
solidifying the fluid to form the protruding part.
7. The golf club head according to claim 1 , wherein the fine groove is formed using a laser; and
the protruding part is formed by moving a portion heated by the laser by the operation of gravity.
8. The golf club head according to claim 7 , wherein the golf club head is manufactured by a manufacturing method comprising the steps of:
making a fluid dissolved by irradiation of the laser flow by gravity while irradiating the face with the laser in a state where the face is inclined; and
solidifying the fluid to form the protruding part.
9. The golf club head according to claim 1 , wherein an angle θ between the score line groove and the fine groove is −45 degrees or greater and 45 degrees or less.
10. The golf club head according to claim 1 , wherein the plurality of score line grooves are formed;
the plurality of fine grooves are formed;
all the score line grooves are parallel to each other; and
all the fine grooves are parallel to the score line grooves.
11. The golf club head according to claim 1 , wherein the fine groove is inclined with respect to the score line groove; and
the fine groove is inclined so that a toe side of the fine groove is located on a top blade side.
12. The golf club head according to claim 1 , wherein the fine groove is inclined with respect to the score line groove; and
the fine groove is inclined so that a toe side of the fine groove is located on a sole side.