US 11,731,012 B2
Golf club head
Naruhiro Mizutani, Kobe (JP); and Tomohiro Hana, Kobe (JP)
Assigned to SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed by SUMITOMO RUBBER INDUSTRIES, LTD., Kobe (JP)
Filed on Aug. 20, 2021, as Appl. No. 17/408,028.
Claims priority of application No. 2020-152349 (JP), filed on Sep. 10, 2020; and application No. 2020-152409 (JP), filed on Sep. 10, 2020.
Prior Publication US 2022/0072391 A1, Mar. 10, 2022
Int. Cl. A63B 53/04 (2015.01)
CPC A63B 53/0466 (2013.01) [A63B 53/0433 (2020.08); A63B 2209/00 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A golf club head comprising: a hollow interior; a sole portion; and a hitting face portion, wherein
the golf club head includes a head body and a fixed member that is fixed to the head body,
the head body is formed by a first material that has a first specific gravity,
the fixed member is formed by a second material that has a second specific gravity,
the head body includes a body opening portion forming a body opening that penetrates through a wall of the golf club head from an outside of the golf club head to the hollow interior,
the fixed member forms a part of an inner surface and a part of an outer surface of the golf club head and is disposed inside the body opening portion,
the fixed member includes an outer peripheral portion and an inside region that is located inside the outer peripheral portion,
at least a part of the outer peripheral portion is joined to an inner peripheral portion of the body opening portion such that the part of the outer peripheral portion and the inner peripheral portion form a joining portion,
the inner peripheral portion of the body opening portion includes a first engaging portion that is constituted by at least one projection or recess,
the outer peripheral portion of the fixed member includes a second engaging portion that is constituted by at least one projection or recess,
the first engaging portion and the second engaging portion form a projection-recess fitting such that the inner peripheral portion and the outer peripheral portion are joined to each other,
an inner surface of the inside region is located on a head outer side with respect to an innermost end of the joining portion,
the body opening portion is provided in the sole portion of the golf club head,
an inner surface of the fixed member forms at least a part of an inner surface of the sole portion,
an outer surface of the fixed member forms at least a part of an outer surface of the sole portion, and
the inner surface of the inside region is located on a lower side with respect to an upper end of the joining portion.