A golf club 1 includes a head 3 and a shaft 5 . The head 3 has a head body M 3 , a grounding member Y 1 and a movement restricting member Y 2 . The head body M 3 has a sole s 3 . The sole s 3 has a slide part S 1 that can slide the grounding member Y 1 . The movement restricting member Y 2 restricts slide movement of the grounding member Y 1 while allowing the grounding member Y 1 to be fixed at a plurality of slide positions. A face angle can be varied depending on the plurality of slide positions of the grounding member Y 1.
1. A golf club comprising:
a head; and
a shaft,
wherein the head comprises a head body, a grounding member, and a movement restricting member;
the head body comprises a sole;
the sole comprises a straight slide part that can slide the grounding member in a front to back direction where a face is located at the front;
the movement restricting member restricts slide movement of the grounding member while allowing the grounding member to be fixed at a plurality of slide positions; and
a face angle can be varied depending on the plurality of slide positions of the grounding member.
2. The golf club according to claim 1 , wherein the movement restricting member comprises at least one positioning member that can slidingly move in the slide part, and a fixed member detachably attached to the head body; and
the slide position of the grounding member is changed by a disposing order of the positioning member and the grounding member; and
the slide movements of the positioning member and the grounding member are restricted by the fixed member.
3. The golf club according to claim 2 , wherein if a specific gravity of the head body is defined as G 1 , a specific gravity of the grounding member is defined as G 2 , and a specific gravity of the positioning member is defined as G 3 ; the specific gravity G 2 is equal to or less than the specific gravity G 1 and the specific gravity G 3 is equal to or less than the gravity G 1 .
4. The golf club according to claim 2 , wherein the plurality of positioning members are provided; and
the positioning members have widths different from each other.
5. The golf club according to claim 2 , wherein if a weight of the grounding member is defined as Wa and a total weight of the one or more positioning members is defined as Wb, Wa/Wb is 0.5 or greater and 1.5 or less.
6. The golf club according to claim 2 , wherein if a weight of the grounding member is defined as Wa and a total weight of the one or more positioning members is defined as Wb, Wa/Wb is 0.2 or greater and less than 0.5.
7. The golf club according to claim 2 , wherein if a weight of the grounding member is defined as Wa and a total weight of the one or more positioning members is defined as Wb, Wa/Wb is greater than 1.5 and 5 or less.
8. The golf club according to claim 1 , wherein the movement restricting member is a screw body axially rotatably supported by the sole;
the grounding member is connected to the screw body in a screwing manner; and
the slide movement of the grounding member is achieved by axially rotating the screw body.
9. The golf club according to claim 1 , wherein a center of gravity of the head moves with the slide movement of the grounding member; and
adjustment of the center of gravity of the head moving to a back side as the face angle is opened is enabled.
10. The golf club according to claim 1 wherein if a specific gravity of the head body is defined as G 1 and a specific gravity of the grounding member is defined as G 2 , the specific gravity G 2 is equal to or less than the specific gravity G 1 .
11. The golf club according to claim 1 , wherein the slide part comprises a slide side surface provided on each of both sides of the slide part;
the slide side surface has an inclination forming an undercut;
the grounding member has a side surface provided on each of both sides of the grounding member;
the side surface of the grounding member has an inclination corresponding to the inclination of the slide side surface;
the grounding member is inserted into the slide part from a backward of the head; and
if the grounding member slides, the side surface of the grounding member and the slide side surface slide with each other.
12. The golf club according to claim 1 , wherein an adjustable range of the face angle is 2 degrees or greater and 10 degrees or less.
13. The golf club according to claim 1 , wherein the plurality of slide positions comprise a plurality of positions in a face-back direction.
14. The golf club according to claim 13 , wherein as the grounding member is positioned on a back side, the face angle is opened.