| 摘要 |
An iron type golf club head comprising: a face plate provided with face grooves; and a head main body arranging the face plate on a front surface thereof, wherein the face plate comprises a peripheral edge part firmly fixed to the head main body, and a non-supported part forming an area surrounded by the peripheral edge part and having a back surface apart from the head main body, and the non-supported part satisfies the following equations (1), (2) and (3): <?in-line-formulae description="In-line Formulae" end="lead"?>1.1<=ha/hb<=1.6; (1)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>1.1x(ha+hb)/2<=hc<=1.5x(ha+hb)/2; (2)<?in-line-formulae description="In-line Formulae" end="tail"?> <?in-line-formulae description="In-line Formulae" end="lead"?>18 (mm)<=hb<=38 (mm) (3)<?in-line-formulae description="In-line Formulae" end="tail"?> (in which ha is a toe side height (mm) of the face groove in an end portion closest to the toe side, hb is a heel side height (mm) of the face groove in an end portion closest to the heel side, and hc is an intermediate height (mm) of the face groove in an intermediate position between the end portion on the toe side and the end portion on the heel side).
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