Patent ID: 9623292
Date: 2017-04-18
CPC Classifications: A63B,Y10T

Claim:
1. A golf club head having a hollow therein and a head volume of not less than 350 cc and comprising a head main body and a substantially cup-shaped face member which are united with each other, wherein the face member integrally includes a face portion having a club face for hitting a ball, and a turnback extending backwardly of the head from the peripheral edge of the club face, an inner surface on the hollow side, of the face member is provided with a groove extending along the boundary of the turnback with the face portion, the face member is a press-formed part whose turnback is bent by press working, said groove comprises a toe-side groove extending along a toe-side part of the boundary and a heel-side groove extending along a heel-side part of the boundary, and the ratio ta/tb of the thickness ta of the face member at the toe-side groove to the thickness tb of the face member at the heel-side groove is in a range of from 0.3 to 1.0.