Sumitomo Rubber Industries Limited

Jun Kodaka

Naruhiro Mizutani

Hirotaka Nakamura

Daisuke Kohno

Kiyofumi Matsunaga

Shinya Furuta

A golf club head includes a face portion that forms a striking face, a crown portion, a sole portion, and a hosel portion. The striking face has a face center. The sole portion includes a toe protruding portion that is a protruding portion provided on a toe side with respect to the face center and is hollow. The toe protruding portion is not present on a heel side with respect to the face center. The toe protruding portion is formed so as to be continuous with the face portion. The height of the toe protruding portion at its apex may be greater than or equal to 1.5 mm and less than or equal to 8 mm. The golf club head is excellent in rebound performance. In the golf club head, the rebound performance can be improved by deformation of the toe protruding portion at impact.

Golf club head

A head includes a face portion, a crown portion, a sole portion, and a hosel portion. The crown portion includes a protruding portion on a crown outer surface. The protruding portion does not form any part of an outer contour line of the head in a front view of the head as viewed from a face side. The protruding portion forms an outer contour line of the head in a heel projection figure in which the head that is placed on a ground plane such that a shaft axis line is perpendicular to the ground plane and a face angle is 0° is viewed from a heel side along the ground plane. In this head, aerodynamic drag and lifting force at a position at which the shaft axis line becomes parallel to the ground plane during downswing can be increased. In this head, air resistance at impact can be suppressed.

Golf club head and golf club

A state of a head placed such that its shaft axis is vertical to a horizontal plane and a face normal line is parallel to a perpendicular plane on which the shaft axis lies is defined as a 0-degree state. A direction parallel to the perpendicular plane and parallel to the horizontal plane is defined as a projection direction. A projected area of the head projected in the projection direction when the head is rotated by θ° about the shaft axis toward a back side from the 0-degree state is denoted by WAθ. WAθ is divided by the shaft axis into an area Afθ and an area Abθ. Airflow causes a force acting on the area Afθ in a face-closing direction and a force acting on the area Abθ in a face-opening direction. (Af−Ab) is −4500 (mm) or less. (Af−Ab) is 4700 (mm) or less.

A golf club head includes a club face, a crown, a leading edge, and a heel portion. The crown includes a first portion being adjacent to the club face, and a second portion being located backwardly of the first portion and connected to the first portion. The second portion is located below the first portion via a step portion. The first portion includes a face-vicinity portion extending in a toe-heel direction along the club face, and a heel-vicinity portion connected to a heel-side end portion of the face-vicinity portion and extending backwardly of the head along a heel-side contour of the crown. In a head plan view, a length A in a head front-back direction from the leading edge to a back-side end of the heel-vicinity portion is equal to or more than 70% of a maximum length B of the head in the head front-back direction.

Growing community of inventors

Kobe, Japan

Jun Kodaka