Iron golf club set

Abstract

An iron golf club set 2 includes n iron golf clubs. Toe side sole widths d 1 of the clubs are defined as d 1 ( 1 ), d 1 ( 2 ), . . . , d 1 (n) in an ascending order of a real loft angle L 1 . A maximum value of the toe side sole widths d 1 is defined as d 1 max. A minimum value of the toe side sole widths d 1 is defined as d 1 min. Heel side sole widths d 2 of the clubs are defined as d 2 ( 1 ), d 2 ( 2 ), . . . , d 2 (n) in an ascending order of a real loft angle L 1 . A maximum value of the heel side sole widths d 2 is defined as d 2 max. A minimum value of the heel side sole widths d 2 is defined as d 2 min. The maximum value d 1 max is substantially equal to the minimum value d 1 min. The maximum value d 2 max is substantially equal to the minimum value d 2 min.

1 . An iron golf club set comprising n iron golf clubs (n is an integer equal to or greater than 2),
 wherein when toe side sole widths d 1  of the clubs are defined as d 1 ( 1 ), d 1 ( 2 ), . . . , d 1 ( n ) in an ascending order of a real loft angle L 1  from the club having the smallest real loft angle L 1 ;   a maximum value of the toe side sole widths d 1  is defined as d 1 max;   a minimum value of the toe side sole widths d 1  is defined as d 1 min;   heel side sole widths d 2  of the clubs are defined as d 2 ( 1 ), d 2 ( 2 ), . . . , d 2 ( n ) in an ascending order of a real loft angle L 1  from the club having the smallest real loft angle L 1 ;   a maximum value of the heel side sole widths d 2  is defined as d 2 max;   a minimum value of the heel side sole widths d 2  is defined as d 2 min;   bounce angles θ 1  of the clubs are defined as θ 1 ( 1 ), θ 1 ( 2 ), . . . , θ 1 ( n ) in an ascending order of a real loft angle L 1  from the club having the smallest real loft angle L 1 ;   a maximum value of the bounce angles θ 1  is defined as θ 1 max; and   a minimum value of the bounce angles θ 1  is defined as θ 1 min,   the iron golf club set satisfies θ 1 ( 1 )≦θ 1 ( 2 )≦ . . . ≦θ 1 ( n );   the maximum value d 1 max is substantially equal to the minimum value d 1 min; and   the maximum value d 2 max is substantially equal to the minimum value d 2 min.   
     
     
         2 . The iron golf club set according to  claim 1 , wherein a difference (d 1 max−d 1 min) is equal to or less than 1.0 mm; and a difference (d 2 max−d 2 min) is equal to or less than 1.0 mm. 
     
     
         3 . The iron golf club set according to  claim 2 , wherein the iron golf club set satisfies d 1 ( 1 )≦d 1 ( 2 )≦ . . . ≦d 1 ( n ), and d 2 ( 1 )≦d 2 ( 2 )≦ . . . ≦d 2 ( n ). 
     
     
         4 . The iron golf club set according to  claim 2 , wherein iron golf club set satisfies d 1 ( 1 )≧d 1 ( 2 )≧ . . . d 1 ( n ), and d 2 ( 1 )≧d 2 ( 2 )≧ . . . ≧d 2 ( n ). 
     
     
         5 . The iron golf club set according to  claim 2 , wherein the difference (d 1 max−d 1 min) is equal to or less than 0.8 mm; and the difference (d 2 max−d 2 min) is equal to or less than 0.8 mm. 
     
     
         6 . The iron golf club set according to  claim 1 , wherein the iron golf club set satisfies θ 1 ( 1 )<θ 1 ( n ). 
     
     
         7 . The iron golf club set according to  claim 6 , wherein the iron golf club set satisfies θ 1 ( 1 )<θ 1 ( 2 )< . . . <θ 1 ( n ). 
     
     
         8 . The iron golf club set according to  claim 1 , wherein a ratio (d 1 /d 2 ) is 0.75 or greater and 2.5 or less in all iron numbers.