IRON TYPE CLUB HEAD HAVING OPTIMUM POINT OF MINIMUM RIGIDITY

PROBLEM TO BE SOLVED: To move a min. rigid point so as to be approximately aligned to the canter of a face or to the centroid of a club head by providing the club head with a rigidity intensifying member sized to nearly align the min. rigid point possessed by a ball hitting plate to the centroid of the club head in the prescribed position of its back wall. SOLUTION: This iron type club head 25 has a front part ball fitting surface, a rear part surface 27, a tone part 28, a heel part 29, a sole part 30 and a top edge. A hosel 32 extends upward from the heel part 29. A cavity 34 is formed on the rear surface of the club head 25 and is delineated by side walls 35 and the back wall 36. The back wall 36 of the cavity 34 extends substantially parallel with the face. The thin ball hitting plate is formed between the face and the back wall 36 within the side walls 35 of the cavity 34. The upper part of the toe part 28 of the ball hitting plate is made higher in rigidity by the rigidity intensifying member 39. This rigidity intensifying member 39 has a rear part surface 40 to be positioned behind the back wall 36 of the remaining cavity 34.