| 主权项 |
1. A wood-type golf club head comprising:
a body having a crown, a sole, a heel, and a toe, the body defining an internal cavity having a front opening; a striking plate attached to the body at the front opening, the striking plate comprising:
a composite face plate having a front surface, anda cover layer attached to the front surface of the face plate, the cover layer defining a forward facing striking surface having a plurality of scorelines, each such scoreline having a scoreline depth of at least 0.1 mm,a peripheral edge,a center zone that is defined by an outer border constituting a center zone circle having a diameter Dcz, with the center of the center zone circle corresponding with a USGA center face location,an impact zone that surrounds but does not include the center zone and that is defined by an outer border constituting a rectangle having its center at the USGA center face location and having upper and lower sides aligned parallel to an address position ground plane and heel and toe sides aligned perpendicular to the address position ground plane, with the upper and lower sides each having a length of 45 mm and the heel and toe sides each having a length of 30 mm, and with the impact zone having an impact zone area, Aiz, anda peripheral zone that surrounds but does not include the impact zone and that extends to the peripheral edge, with the peripheral zone having a peripheral zone area, Apz; wherein:
the club head defines a striking surface area of at least 4,000 mm2, andthe center zone circle diameter Dcz is between 1 mm to 10 mm, wherein the portion of the cover layer within the center zone of the striking plate does not include any scorelines; wherein the impact zone is provided with a plurality of scorelines having a scoreline area, Asliz, such that the ratio Asliz/Aiz is at least 0.17; and wherein each of the scorelines outside the center zone extends across substantially the full width of the striking surface. |
