Golf club head
View Patent ↗A golf club head 2 a of a first aspect is provided with a head body h 1 a , a double-stick tape w 1 , and an adherend s 1 a bonded to the head body h 1 a by the double-stick tape w 1 . When an average thickness of a lower part of the adherend s 1 a is defined as f 1 and an average thickness of an upper part of the adherend s 1 a is defined as f 2 , the thickness f 2 is smaller than the thickness f 1 . A golf club head 2 according to a second aspect is provided with a head body h 1 , a double-stick tape w 1 and an adherend s 1 bonded to the head body h 1 by the double-stick tape w 1 . When an average thickness of a heel part of the adherend s 1 is defined as t 1 and an average thickness of a toe part of the adherend s 1 is defined as t 2 , the thickness t 2 is smaller than the thickness t 1.
1. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness f 2 of an upper part of the adherend is smaller than an average thickness f 1 of a lower part of the adherend; and
a ratio (f 1 /f 2 ) of the thickness f 1 to the thickness f 2 is 1.1 or greater and 5 or less.
2. The golf club head according to claim 1 , wherein an average thickness t 2 of a toe part of the adherend is smaller than an average thickness t 1 of a heel part of the adherend.
3. The golf club head according to claim 1 , wherein the double-stick tape has a first adhesive layer, a second adhesive layer and an intermediate layer provided between the first adhesive layer and the second adhesive layer; and the intermediate layer includes a fiber layer.
4. The golf club head according to claim 3 , wherein the fiber layer is a nonwoven fabric layer.
5. The golf club head according to claim 1 , wherein a thickness of the double-stick tape is 0.1 mm or greater and 0.4 mm or less.
6. The golf club head according to claim 1 , wherein the thickness f 1 is 0.5 mm or greater 2.0 mm or less.
7. The golf club head according to claim 1 , wherein the thickness f 2 is 0.2 mm or greater and 1.5 mm or less.
8. The golf club head according to claim 1 , wherein a height Hg of a gravity center of the head is 15 mm.
9. The golf club head according to claim 1 , wherein a minimum thickness f 1 min of a lower part of the adherend is equal to or greater than a maximum thickness f 2 max of an upper part of the adherend.
10. The golf club head according to claim 1 , wherein if a maximum thickness of a lower part of the adherend is defined as f 1 max , a straight line connecting a sweet spot and a gravity center of the head with each other crosses a portion with the thickness f 1 max of the adherend.
11. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness t 2 of a toe part of the adherend is smaller than an average thickness t 1 of a heel part of the adherend; and
a ratio (t 1 /t 2 ) of the thickness t 1 to the thickness t 2 is 1.1 or greater and 5 or less.
12. The golf club head according to claim 11 , wherein a maximum thickness t 1 max of the heel part of the adherend is equal to or greater than a maximum thickness t 2 max of the toe part of the adherend; a minimum thickness t 1 min of the heel part of the adherend is equal to or greater than a minimum thickness t 2 min of the toe part of the adherend; and the thickness t 1 is equal to or greater than the maximum thickness t 2 max .
13. The golf club head according to claim 11 , wherein the adherend is bonded to the head body by a double-stick tape; the double-stick tape has a first adhesive layer, a second adhesive layer and an intermediate layer provided between the first adhesive layer and the second adhesive layer; and the intermediate layer includes a fiber layer.
14. The golf club head according to claim 13 , wherein a thickness of the double-stick tape is 0.1 mm or greater and 0.4 mm or less.
15. The golf club head according to claim 13 , wherein the fiber layer is a nonwoven fabric layer.
16. The golf club head according to claim 11 , wherein the thickness t 1 is 0.5 mm or greater and 2.5 mm or less.
17. The golf club head according to claim 11 , wherein the thickness t 2 is 0.2 mm or greater and 1.5 mm or less.
18. The golf club head according to claim 11 , wherein a gravity center distance Dg of the head is 25 mm or greater and 45 mm or less.
19. The golf club head according to claim 11 , wherein if a maximum thickness of the heel part of the adherend is defined as t 1 max , a straight line connecting a sweet spot and a gravity center of the head with each other crosses a portion with the thickness t 1 max of the adherend.
20. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness f 2 of an upper part of the adherend is smaller than an average thickness f 1 of a lower part of the adherend; and
the thickness f 1 is 0.5 mm or greater 2.0 mm or less.
21. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness f 2 of an upper part of the adherend is smaller than an average thickness f 1 of a lower part of the adherend; and
the thickness f 2 is 0.2 mm or greater and 1.5 mm or less.
22. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness f 2 of an upper part of the adherend is smaller than an average thickness f 1 of a lower part of the adherend; and
if a maximum thickness of a lower part of the adherend is defined as f 1 max , a straight line connecting a sweet spot and a gravity center of the head with each other crosses a portion with the thickness f 1 max of the adherend.
23. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness t 2 of a toe part of the adherend is smaller than an average thickness t 1 of a heel part of the adherend; and
a maximum thickness t 1 max of the heel part of the adherend is equal to or greater than a maximum thickness t 2 max of the toe part of the adherend; a minimum thickness t 1 min of the heel part of the adherend is equal to or greater than a minimum thickness t 2 min of the toe part of the adherend; and the thickness t 1 is equal to or greater than the maximum thickness t 2 max .
24. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness t 2 of a toe part of the adherend is smaller than an average thickness t 1 of a heel part of the adherend; and
the thickness t 1 is 0.5 mm or greater and 2.5 mm or less.
25. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness t 2 of a toe part of the adherend is smaller than an average thickness t 1 of a heel part of the adherend; and
the thickness t 2 is 0.2 mm or greater and 1.5 mm or less.
26. A golf club head comprising:
a head body;
a double-stick tape; and
an adherend bonded to the head body by the double-stick tape,
wherein the head body has a face surface and a back surface located on a back of the face surface;
the adherend is bonded to the back surface;
an average thickness t 2 of a toe part of the adherend is smaller than an average thickness t 1 of a heel part of the adherend; and
if a maximum thickness of the heel part of the adherend is defined as t 1 max , a straight line connecting a sweet spot and a gravity center of the head with each other crosses a portion with the thickness t 1 max of the adherend.