Toothbrush

Abstract

A toothbrush includes a neck formed between a head and a handle and curved to protrude towards a front surface of the toothbrush. A through hole is formed through both front and rear surfaces of the neck. A bending prevention portion is formed in the neck, located at each of opposite sides on an outer circumference of the through hole to be curved outwards along the outer circumference thereof, and spaced apart from both sides of the neck by a predetermined interval to define a predetermined space. The elastic member is filled in the through hole and is coupled to be superposed on a rear surface of the handle. An elastic groove is formed in a rear surface of an upper portion of the elastic member to be opposite to the through hole.

What is claimed is: 
     
         1 . A toothbrush, comprising:
 a neck formed between a head and a handle, and curved to protrude towards a front surface of the toothbrush;   a through hole formed through both a front surface and a rear surface of the neck;   a bending prevention portion formed in the neck, located at each of opposite sides on an outer circumference of the through hole to be curved outwards along the outer circumference of the through hole, and spaced apart from both sides of the neck by a predetermined interval to define a predetermined space between both the sides of the neck, with an elastic member filled in the space;   the elastic member filled in the through hole and coupled to be superposed on a rear surface of the handle; and   an elastic groove formed in a rear surface of an upper portion of the elastic member to be opposite to the through hole.   
     
     
         2 . The toothbrush as set forth in  claim 1 , wherein the bending prevention portion is folded while protruding outwards, when the head is bent towards the rear surface of the neck. 
     
     
         3 . The toothbrush as set forth in  claim 1 , wherein the elastic member is coupled to be superposed on the front surface of the neck via the through hole while being filled in the through hole. 
     
     
         4 . The toothbrush as set forth in  claim 1 , wherein the elastic groove is filled with a member softer than the elastic member. 
     
     
         5 . The toothbrush as set forth in  claim 4 , wherein the soft member is silicone rubber.