Inside Structure of Dimple for Golf Ball

Abstract

The present invention provides a dimple structure for golf balls. In the present invention, a plurality of dimples ( 50 a ) each having a predetermined shape is disposed on an outer surface of a golf ball in a predetermined arrangement. The dimple structure of the present invention includes at least one protrusion ( 60 a ) which is integrally provided in the dimple ( 50 a ), thus increasing the contact area between the golf ball and the head of a golf club, and increasing resilient force of the golf ball against the golf club head, thereby increasing the distance that the golf ball is driven. As well, the present invention increases the amount of backspin on the golf ball when an approach shot is executed near the putting green, thus allowing the rolling action of the golf ball on the putting green to be easily controlled.

1 . A dimple structure for golf balls, comprising:
 at least one protrusion integrally provided in a dimple of a golf ball.   
   
   
       2 . The dimple structure for golf balls according to  claim 1 , wherein the protrusion is provided between an outer circumferential line and an inner circumferential line between which a depth of the dimple is defined, so that the protrusion does not protrude outside the outer circumferential line. 
   
   
       3 . The dimple structure for golf balls according to  claim 1 , wherein the protrusion is provided in each of a plurality of dimples of the golf ball. 
   
   
       4 . The dimple structure for golf balls according to  claim 1 , wherein the protrusion is evenly provided in 15% to 85% of a plurality of dimples of the golf ball such that a center of gravity of the golf ball exists at a same point in the golf ball regardless of an orientation of the golf ball. 
   
   
       5 . The dimple structure for golf balls according to  claim 1 , wherein the protrusion has a size of 5% to 60% of a surface area of the dimple.