Patent ID: 9155942
Filing Date: 2015-10-13
Classification: A63B

Abstract:
1. A golf club head comprising: a head body; and a neck part, wherein the neck part is welded to the head body; the head body has a body side joint surface and a first recessed part opened in the body side joint surface; a space is formed by the first recessed part, wherein the whole space is located on an upper side of a center of gravity of the head; the neck part has a neck side joint surface brought into surface contact with the body side joint surface and a shaft hole; an abutted boundary surface determined by the surface contact passes through a vicinity of a head height lowest point; and when a plane perpendicular to an axis line of the shaft hole is defined as PL, and an angle between the plane PL and the abutted boundary surface is defined as θ degree; the angle θ when being viewed from a back side of the head is defined as plus in the case where a direction toward the abutted boundary surface from the plane PL is a counterclockwise rotation; and the angle θ when being viewed from the back side of the head is defined as minus in the case where the direction toward the abutted boundary surface from the plane PL is a clockwise rotation, whereby the above defined angle θ is a plus value, and the opening of the first recessed part is closed by the neck part.