Abstract: A golf club head includes a main body and a cover member. The main body is provided with a sole opening, and a receiving area therearound. The cover member integrally includes a crown cover and a sole cover. The sole cover has a peripheral edge portion on the receiving area. The sole portion is provided with a convexed or concaved shape-changing portion. The peripheral edge portion of the sole cover is located between the shape-changing portion and the back-side outer rim portion. The outer surface of the sole portion includes a first region on a side opposite of the shape-changing portion opposite to the back-side outer rim portion, and a second region on the same side of the shape-changing portion as the back-side outer rim portion. The second region includes a polished area formed from a part of the sole cover and a part of the main body.

Abstract: A golf club head includes a cover member, and a club head main body comprising a crown portion, a sole portion and a back-side outer rim portion. The club head main body is made of a first material. The club head main body is provided with a crown opening and a cutout. The cutout is made up of a first opening on the crown portion side and a second opening on the sole portion side, and these opening are connected with each other in the back-side outer rim portion. The width of the cutout and the contour length of the back-side outer rim portion in the top view of the club head are relative with each other. The cover member is made of a second material having a specific gravity lower than the first material. The crown cover closes the crown opening and the first opening. The sole cover closes the second opening.

Abstract: A golf club head comprises a main body and a cover member. The main body is provided with a sole opening, and a receiving area formed therearound. The cover member integrally includes a crown cover and a sole cover. The sole cover has a peripheral edge portion laid on the receiving area. The sole portion is provided with a shape-changing portion which is convexed or concaved. The peripheral edge portion of the sole cover is located between the shape-changing portion and the back-side outer rim portion. The outer surface of the sole portion includes a first region A1 on the opposite side of the shape-changing portion to the back-side outer rim portion, and a second region A2 on the same side of the shape-changing portion as the back-side outer rim portion. The second region A2 includes a polished area formed from a part of the sole cover and a part of the main body which are polished.

Abstract: A golf club head includes a cover member, and a club head main body comprising a crown portion, a sole portion and a back-side outer rim portion. The club head main body is made of a first material. The club head main body is provided with a crown opening and a cutout. The cutout is made up of a first opening on the crown portion side and a second opening on the sole portion side, and these opening are connected with each other in the back-side outer rim portion. The width of the cutout and the contour length of the back-side outer rim portion in the top view of the club head are relative with each other. The cover member is made of a second material having a specific gravity lower than the first material. The crown cover closes the crown opening and the first opening. The sole cover closes the second opening.

Abstract: A method for manufacturing a golf club head comprises: fixing an internal weight member to a sole of a first member from the outside through an opening; and fixing a second member to the first member to close the opening. The first member is provided, at a position accessible from the outside of the first member, with a pedestal portion protruding toward the crown. The first member comprises a thin-walled portion between the pedestal portion and the face. The pedestal portion comprises: a first part for positioning the internal weight member in the up-down direction, and a second part for positioning the internal weight member in the toe-heel direction and/or front-back direction of the head. The internal weight member positioned by the first and second parts, extends toward the face at a position above the thin-wall portion without contacting with the thin-wall portion and the face.

Abstract: A hollow golf club head includes a face portion, and a sole portion including a toe-side thick walled portion formed on a toe-side thereof, a heel-side thick walled portion formed on a heel-side thereof, and a middle thin walled portion formed between the toe-side thick walled portion and the heel-side thick walled portion. At least a part of the toe-side thick walled portion and at least a part of the heel-side thick walled portion are located on the face portion to a club head center of gravity. The middle thin walled portion having a smaller thickness than the toe-side thick walled portion and the heel-side thick walled portion. The sole portion is provided with a toe-side through hole between the toe-side thick walled portion and the middle thin walled portion and a heel-side through hole between the heel-side thick walled portion and the middle thin walled portion.

Abstract: A method for manufacturing a golf club head comprises: fixing an internal weight member to a sole of a first member from the outside through an opening; and fixing a second member to the first member to close the opening. The first member is provided, at a position accessible from the outside of the first member, with a pedestal portion protruding toward the crown. The first member comprises a thin-walled portion between the pedestal portion and the face. The pedestal portion comprises: a first part for positioning the internal weight member in the up-down direction, and a second part for positioning the internal weight member in the toe-heel direction and/or front-back direction of the head. The internal weight member positioned by the first and second parts, extends toward the face at a position above the thin-wall portion without contacting with the thin-wall portion and the face.

Abstract: The present disclosure is a golf club set constituted by a plurality of golf clubs having different loft angles, each of the golf clubs has a shaft and a golf club head, and each of the golf club heads has a crown part, a face part, a sole part, and a hosel part to which the shaft is attached.

Abstract: A golf club head includes a striking face. The striking face includes: a face center; a face center region that is a square region having a height of 10 mm and a width of 10 mm, a center of figure of the face center region being located at the face center; a central thick portion that includes the face center region and has a first thickness; and a peripheral thin portion that is located on a periphery of the central thick portion and is thinner than the central thick portion. A CT maximum point is present in the face center region. A shape of an outer edge of the peripheral thin portion is not similar to that of an outer edge of the central thick portion. A difference in thickness between the central thick portion and the peripheral thin portion is 0.3 mm or less.

Abstract: A hollow golf club head includes a face portion, and a sole portion including a toe-side thick walled portion formed on a toe-side thereof, a heel-side thick walled portion formed on a heel-side thereof, and a middle thin walled portion formed between the toe-side thick walled portion and the heel-side thick walled portion. At least a part of the toe-side thick walled portion and at least a part of the heel-side thick walled portion are located on the face portion to a club head center of gravity. The middle thin walled portion having a smaller thickness than the toe-side thick walled portion and the heel-side thick walled portion. The sole portion is provided with a toe-side through hole between the toe-side thick walled portion and the middle thin walled portion and a heel-side through hole between the heel-side thick walled portion and the middle thin walled portion.

Abstract: A golf club set according to the present invention is constituted by a plurality of golf clubs having different loft angles, each of the golf clubs has a shaft and a golf club head, and each of the golf club heads have a crown part, a face part, a sole part, and a hosel part to which the shaft is attached. In the face part, an upper edge line that is a boundary with the crown part curves so as to protrude upward, and, out of the plurality of golf clubs, at least a pair of a first golf club having a lower loft angle and a second golf club having a higher loft angle are configured such that, in a reference state, an uppermost point of the upper edge line of the second golf club is located further on a toe side than in the first golf club.

Abstract: The present disclosure is a golf club set constituted by a plurality of golf clubs having different loft angles, each of the golf clubs has a shaft and a golf club head, and each of the golf club heads has a crown part, a face part, a sole part, and a hosel part to which the shaft is attached.

Abstract: A golf club set according to the present invention is constituted by a plurality of golf clubs having different loft angles, each of the golf clubs has a shaft and a golf club head, and each of the golf club heads have a crown part, a face part, a sole part, and a hosel part to which the shaft is attached. In the face part, an upper edge line that is a boundary with the crown part curves so as to protrude upward, and, out of the plurality of golf clubs, at least a pair of a first golf club having a lower loft angle and a second golf club having a higher loft angle are configured such that, in a reference state, an uppermost point of the upper edge line of the second golf club is located further on a toe side than in the first golf club.

Abstract: A golf club head includes a striking face. The striking face includes: a face center; a face center region that is a square region having a height of 10 mm and a width of 10 mm, a center of figure of the face center region being located at the face center; a central thick portion that includes the face center region and has a first thickness; and a peripheral thin portion that is located on a periphery of the central thick portion and is thinner than the central thick portion. A CT maximum point is present in the face center region. A shape of an outer edge of the peripheral thin portion is not similar to that of an outer edge of the central thick portion. A difference in thickness between the central thick portion and the peripheral thin portion is 0.3 mm or less.

Abstract: The golf club set according to the present invention is a golf club set constituted by a plurality of numbered golf clubs with different loft angles. In each of the golf, a crown portion has a main body portion that connects to the sole portion and a raised portion that rises to form a step from the main body portion and extends in a toe-heel direction along a boundary with the face portion. In at least one pair of a lower numbered golf club and a higher numbered golf club, among the plurality of golf clubs included in the golf club set, a length of the step in a face-back direction along a perpendicular plane that passes through a sweet spot and a center of gravity of the golf club head is longer in the lower numbered golf club than in the higher numbered golf club.

Abstract: The golf club set according to the present invention is a golf club set constituted by a plurality of numbered golf clubs with different loft angles. In each of the golf, a crown portion has a main body portion that connects to the sole portion and a raised portion that rises to form a step from the main body portion and extends in a toe-heel direction along a boundary with the face portion. In at least one pair of a lower numbered golf club and a higher numbered golf club, among the plurality of golf clubs included in the golf club set, a length of the step in a face-back direction along a perpendicular plane that passes through a sweet spot and a center of gravity of the golf club head is longer in the lower numbered golf club than in the higher numbered golf club.