Golf club and method for manufacturing the same

A golf club comprising a head with a shaft connected thereto, said head comprising a metallic head body, a cavity formed on a rear surface of the head body, and a back member that is made of different metal than that of the head body and is housed in said cavity, said head body and said back member being secured to each other by plastic deformation,

• at least one of said head body and said back member having portions which are deformed by plastic deformation so as to allow said head body and said back member to fit closely with each other and without gaps in a region of said plastic deformation;
• wherein said head body comprises a face provided on a front, while said cavity comprises:
• a peripheral surface formed nearly perpendicular to the face;
• and a bottom surface formed nearly parallel to the face, and wherein said back member comprises a peripheral surface, a front surface and a back surface which correspond to the peripheral surface, bottom surface of said cavity and the rear surface of said head body, respectively;
• and
• wherein a tip end of the peripheral surface of said cavity is formed with a protrusion, while an edge of the back surface of said back member is formed with a cutout, said cutout being filled by collapsing said protrusion after the back member is housed in the cavity.

A golf club comprising a head with a shaft connected thereto, said head comprising a metallic head body, a cavity formed on a rear surface of the head body, and a back member that is made of different metal than that of the head body and is housed in said cavity, said head body and said back member being secured to each other by plastic deformation,

• at least one of said head body and said back member having portions which are deformed by plastic deformation so as to allow said head body and said back member to fit closely with each other and without gaps in a region of said plastic deformation;
• wherein said head body comprises a face provided on a front, while said cavity comprises:
• a peripheral surface formed nearly perpendicular to the face;
• and a bottom surface formed nearly parallel to the face, and wherein said back member comprises a peripheral surface, a front surface and a back surface which correspond to the peripheral surface, bottom surface of said cavity and the rear surface of said head body, respectively;
• and
• wherein a neighborhood of a tip end of the peripheral surface of said cavity is formed with a convex portion, while the peripheral surface of said back member is formed with a recess, said recess being filled by collapsing said convex portion after the back member is housed in the cavity.

A golf club comprising a head with a shaft connected thereto, said head comprising a metallic head body, a cavity formed on a rear surface of the head body, and a back member that is made of different metal than that of the head body and is housed in said cavity, said head body and said back member being secured to each other by plastic deformation,

• at least one of said head body and said back member having portions which are deformed by plastic deformation so as to allow said head body and said back member to fit closely with each other and without gaps in a region of said plastic deformation;
• wherein said head body comprises a face provided on a front, while said cavity comprises:
• a peripheral surface formed nearly perpendicular to the face;
• and a bottom surface formed nearly parallel to the face, and wherein said back member comprises a peripheral surface, a front surface and a back surface which correspond to the peripheral surface, bottom surface of said cavity and the rear surface of said head body, respectively;
• and
• wherein a recess is formed adjacent a lower end of the peripheral surface of said cavity, while the front surface of said back member is formed with a protrusion extending toward the face, said recess being filled by collapsing said protrusion after the back member is housed in the cavity.

A golf club comprising a head with a shaft connected thereto, said head comprising a metallic head body, a cavity formed on a rear surface of the head body, and a back member that is made of different metal than that of the head body and is housed in said cavity, said head body and said back member being secured to each other by plastic deformation,

• at least one of said head body and said back member having portions which are deformed by plastic deformation so as to allow said head body and said back member to fit closely with each other and without gaps in a region of said plastic deformation;
• wherein said head body comprises a face provided on a front, while said cavity comprises:
• a peripheral surface formed nearly perpendicular to the face;
• and a bottom surface formed nearly parallel to the face, and wherein said back member comprises a peripheral surface, a front surface and a back surface which correspond to the peripheral surface, bottom surface of said cavity and the rear surface of said head body, respectively;
• and
• wherein a recess is formed adjacent a lower end of the peripheral surface of said cavity, and the bottom surface thereof is formed with a protrusion extending rearwardly, said recess being filled by collapsing said protrusion after the back member is housed in the cavity.

A golf club comprising a head with a shaft connected thereto, said head comprising a metallic head body, a cavity formed on a rear surface of the head body, and a back member that is made of different metal than that of the head body and is housed in said cavity, said head body and said back member being secured to each other by plastic deformation,

• at least one of said head body and said back member having portions which are deformed by plastic deformation so as to allow said head body and said back member to fit closely with each other and without gaps in a region of said plastic deformation;
• wherein said head body comprises a face provided on a front, while said cavity comprises:
• a peripheral surface formed nearly perpendicular to the face;
• and a bottom surface formed nearly parallel to the face, and wherein said back member comprises a peripheral surface, a front surface and a back surface which correspond to the peripheral surface, bottom surface of said cavity and the rear surface of said head body, respectively;
• and
• wherein a ring-shaped protrusion is formed on either the front surface of said back member or the bottom surface of said cavity, while a lower end of the bottom surface of said cavity is formed with a recess, said recess being filled by collapsing said ring-shaped protrusion after the back member is housed in the cavity.