Abstract: A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.

Abstract: A golf club head according to the disclosure is a cavity-back iron type golf club head that includes a face portion and a back portion. The face portion includes a front face and a rear face facing away from each other, the front face being a ball-striking face. A non-metallic member is fixed to the rear face. An abutment portion including a tip portion with a curved surface is provided on the back portion. The abutment portion is passed through the back portion, and the curved surface of the tip portion contacts the non-metallic member.

Abstract: A golf club head having a hollow structure includes a face, a sole, and a crown. The face includes a front surface and a back surface that face away from each other. The front surface is a ball-striking surface. The sole includes an abutment structure. The abutment structure includes a metallic sole fixation member fixed to the sole, an elastic member, and a metallic pin member connected to the metallic sole fixation member through the elastic member.

Abstract: A golf club head having a hollow structure includes a face, a crown, and a sole. The sole includes multiple elongated ribs. The ribs includes a first rib, a second rib, a third rib, and a fourth rib that are arranged in order from the toe side to the heel side. An end of the first rib and a first end of the second rib are connected to form a first connection end. A second end of the second rib and a first end of the third rib are connected to form a second connection end. A second end of the third rib and an end of the fourth rib are connected to form a third connection end. Each of the first rib and the fourth rib is longer than each of the second rib and the third rib.

Abstract: A golf club head having a hollow structure includes a face, a crown, and a sole. The sole includes multiple elongated ribs. The ribs includes a first rib, a second rib, a third rib, and a fourth rib that are arranged in order from the toe side to the heel side. An end of the first rib and a first end of the second rib are connected to form a first connection end. A second end of the second rib and a first end of the third rib are connected to form a second connection end. A second end of the third rib and an end of the fourth rib are connected to form a third connection end. Each of the first rib and the fourth rib is longer than each of the second rib and the third rib.

Abstract: A golf club head comprises two weight members, and in a reference plan view where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set. The reference imaginary straight line passes through a central axis of a hosel hole and a head gravity center is determined when weight members are not attached. The first imaginary straight line passes through the central axis of the hosel hole and a center of the first opening part. The second imaginary straight line passes through the central axis of the hosel hole and a center of the second opening part. A first angle ?1 between the reference and first imaginary straight lines is ±10 degrees or less, and a second angle ?2 between the reference and second imaginary straight lines is larger than the first angle ?1.

Abstract: A golf club head of this invention includes a face portion, first and second interchangeable members, a first attachment portion from which the first and second interchangeable members are detachable, and a second attachment portion from which the first and second interchangeable members are detachable. The first interchangeable member is a reinforcing member that abuts against the rear surface of the face portion and restricts deformation of an abutment portion when the member is attached to the first attachment portion. The second interchangeable member is a member that does not abut against the rear surface of the face portion when the member is attached to the first attachment portion.

Abstract: A golf club head comprises two weight members, and in a reference plan view where a sole part faces upward and a hosel hole central axis extension line is vertical, a reference imaginary straight line, a first imaginary straight line and a second imaginary straight line are set. The reference imaginary straight line passes through a central axis of a hosel hole and a head gravity center is determined when weight members are not attached. The first imaginary straight line passes through the central axis of the hosel hole and a center of the first opening part. The second imaginary straight line passes through the central axis of the hosel hole and a center of the second opening part. A first angle ?1 between the reference and first imaginary straight lines is ±10 degrees or less, and a second angle ?2 between the reference and second imaginary straight lines is larger than the first angle ?1.

Abstract: An iron type golf club head that comprises a face part, a sole part, a hosel part, and a cavity part. A lower part of an inner surface of the cavity part on a face surface side is a forward recess part that is recessed toward a face surface, and following formulas are satisfied: ?2??3 and ?2??1 wherein an intersectional angle that is formed between the lower part of the inner surface of the cavity part on the face surface side and the face surface is marked with ?2, an intersectional angle that is formed between a rear surface of the cavity part and the face surface is marked with ?3, and an intersectional angle that is formed between a bottom surface of the cavity part and the face surface is marked with ?1.

Abstract: A golf club head of this invention includes a face portion, first and second interchangeable members, a first attachment portion from which the first and second interchangeable members are detachable, and a second attachment portion from which the first and second interchangeable members are detachable. The first interchangeable member is a reinforcing member that abuts against the rear surface of the face portion and restricts deformation of an abutment portion when the member is attached to the first attachment portion. The second interchangeable member is a member that does not abut against the rear surface of the face portion when the member is attached to the first attachment portion.

Abstract: An iron type golf club head that comprises a face part, a sole part, a hosel part, and a cavity part. A lower part of an inner surface of the cavity part on a face surface side is a forward recess part that is recessed toward a face surface, and following formulas are satisfied: ?2??3 and ?2??1 wherein an intersectional angle that is formed between the lower part of the inner surface of the cavity part on the face surface side and the face surface is marked with ?2, an intersectional angle that is formed between a rear surface of the cavity part and the face surface is marked with ?3, and an intersectional angle that is formed between a bottom surface of the cavity part and the face surface is marked with ?1.

Abstract: This invention provides a golf club head which includes a face portion, and has a volume of 400 cc or more. When the golf club head is disposed on a horizontal plane at a specific lie angle while the face portion is matched with the flight trajectory direction, and images of the face portion and the golf club head are projected onto a vertical plane from the front side of the face portion upon defining the flight trajectory direction as the projection direction, the area of a projected figure H of the golf club head is defined as HA, and the area of a projected figure F of the face portion is defined as FA. The golf club head satisfies 0.5<FA/HA<0.7, and a centroid Hc of the projected figure H coincides with a centroid Fc of the projected figure F.

Abstract: This invention provides a golf club head including a face surface and sole portion. This golf club head includes a main body member, a face member, a sole member, and a fastening structure which fastens the main body member, the face member, and the sole member to be separable from each other. The main body member, the face member, and the sole member include stack portions, respectively, which are stacked on each other. The fastening structure fastens the main body member, the face member, and the sole member together in the stack portions.

Abstract: This invention provides a hollow golf club head including a face portion, a crown portion, a sole/side portion which includes a sole portion and a side portion, and a weight member. The golf club head includes a recessed portion which is formed in the sole/side portion, and has an outer surface to which the weight member is attached, and a rib which is formed on the inner surface of the sole/side portion, and traverses the recessed portion across the peripheral edge defining the recessed portion.

Abstract: This invention provides a golf club head including a plurality of scorelines formed in its face surface and extending in the toe-to-heel direction. This golf club head includes a recessed portion for the cutting start of each scoreline, which is formed at one end or each of both ends of the scoreline in the longitudinal direction at a depth equal to or larger than that of the scoreline.