A head ( 2 ) includes an outer shell portion ( 4 ) forming an external surface of the head and a hollow portion ( 16 ) of the head, an inside extended portion ( 18 ) extended from the outer shell portion ( 4 ) to an inner part of the head, a housing portion (s 1 ) formed by the outer shell portion ( 4 ) and the inside extended portion ( 18 ), and an adjusting material (w 1 ) disposed in the housing portion (s 1 ). The outer shell portion ( 4 ) is formed by bonding a plurality of outer shell forming members ( 26 ) and ( 28 ) formed integrally respectively. The outer shell forming member ( 26 ) has the inside extended portion ( 18 ), and the outer shell forming member ( 28 ) has the outer shell portion ( 4 ) to be a part of the housing portion (s 1 ). One of the outer shell forming members may have the whole housing portion (s 1 ) and may be formed by casting a metallic material.
1. A golf club head comprising an outer shell portion forming an external surface of the head and a hollow portion of the head, an inside extended portion extended from the outer shell portion to an inner part of the head and having an end face provided apart from the outer shell portion, a housing portion formed by the outer shell portion and the inside extended portion, and an adjusting material disposed in the housing portion,
wherein the outer shell portion is formed by bonding a plurality of outer shell forming members formed integrally respectively,
one of the outer shell forming members includes the inside extended portion, and
the other outer shell forming member includes the outer shell portion that forms a part of the housing portion.
2. The golf club head according to claim 1 , wherein a through hole for causing the external surface of the head to communicate with the housing portion is provided.
3. The golf club head according to claim 2 , wherein the adjusting material is a thermoplastic resin.
4. The golf club head according to claim 1 , wherein the adjusting material is a thermoplastic resin.
5. A golf club head comprising an outer shell portion forming an external surface of the head and a hollow portion of the head, an inside extended portion extended from the outer shell portion to an inner part of the head and having an end face provided apart from the outer shell portion, a housing portion formed by the outer shell portion and the inside extended portion, and an adjusting material disposed in the housing portion,
wherein the outer shell portion is formed by bonding a plurality of outer shell forming members formed integrally respectively,
one of the outer shell forming members integrally includes the entire housing portion and is formed by casting a metallic material,
an external wall of the housing portion is formed by the outer shell portion, and
an internal wall of the housing portion is formed by the inside extended portion.
6. The golf club head according to claim 5 , wherein a through hole for causing the external surface of the head to communicate with the housing portion is provided.
7. The golf club head according to claim 6 , wherein the adjusting material is a thermoplastic resin.
8. The golf club head according to claim 5 , wherein the adjusting material is a thermoplastic resin.
9. A golf club head comprising an outer shell portion forming an external surface of the head and a hollow portion of the head, an inside extended portion extended from the outer shell portion to an inner part of the head and having an end face provided apart from the outer shell portion, a housing portion formed by the outer shell portion and the inside extended portion, and an adjusting material disposed in the housing portion,
wherein the outer shell portion is formed by bonding a plurality of outer shell forming members formed integrally respectively,
the outer shell portion has a face portion, a crown portion, a sole portion and a side portion,
a first of the outer shell forming members includes the housing portion and is formed by casting a metallic material,
an end face of an edge part on the sole side of a second of the outer shell forming members is bonded to a surface of the first outer shell forming member.
10. A golf club head comprising an outer shell portion forming an external surface of the head and a hollow portion of the head, an inside extended portion extended from the outer shell portion to an inner part of the head and having an end face provided apart from the outer shell portion, a housing portion formed by the outer shell portion and the inside extended portion, and an adjusting material disposed in the housing portion,
wherein the outer shell portion is formed by bonding a plurality of outer shell forming members formed integrally respectively,
the outer shell portion has a face portion, a crown portion, a sole portion and a side portion,
a first of the outer shell forming members includes the housing portion and is formed by casting a metallic material, and
the first outer shell forming member includes a part of the crown portion, a part of the sole portion and a part of the side portion of the outer shell portion.