Length-adjustable golf putter

Abstract

The present invention relates to a length-adjustable golf putter primarily for use in putting a ball that is on green into a hole in a golf match. The invention is particularly for solving problems generated in case of short putting. When a player uses a long putter for short putting, gap between a bottom of green and an eye of a player is widened and range of vision is opened out, which lowers concentration, causing a problem that a putting line is not read exactly. Accordingly, an object of the present invention for eliminating mistakes originated from such problem, is to provide a putter whose length can be adjusted depending on putting distance, thereby achieving high putting success rate.

What is claimed is:  
     
         1 . A length-adjustable golf putter having a shaft(s) to which a putter head is fit and a grip which is fit in the upper part of the shaft, the shaft(s) moves up and down within the grip; the golf putter comprising: 
 a guiding tube which is fixed within the grip and has a shaft rising path so that the shaft may move up and down through it;    a shaft guiding surface projected vertically on the inner surface of the shaft rising path;    a concave groove which is installed with a predetermined length and is stuck on the shaft guiding surface of the guiding tube for moving up and down on the guiding surface so that the shaft is not rotated; and    a shaft fixing member which is fixed in the bottom of the grip for fixing the shaft.    
     
     
         2 . The length-adjustable golf putter as claimed in clime  1 , wherein the shaft of the putter moves up and down through the shaft rising path of the guiding tube fixed within the grip, whereby its length can be adjusted; and fixing of the shaft is made by use of the fixing member comprising a tightening tube block and a fixing tube block which is fixed in the bottom of the grip.  
     
     
         3 . The length-adjustable golf putter as claimed in clime  2 , wherein a female screw part is formed on the inner wall of the tightening tube block, and a male screw part is formed on the outer wall of the fixing tube block for being combined in a screw binding manner; the bottom inner wall of the tightening tube block and the bottom outer wall of the fixing tube block have tapered surfaces, respectively; and a plurality of cut grooves are formed on the tapered surface of the fixing tube block.