Toothbrush

Abstract

A toothbrush that can more effectively clean an interdental gap, a gap between a tooth and gums, a dental groove, and a surface of the tooth and the gums. In the toothbrush, a bristle implanting section is formed so that a bristle implanting surface is in an elliptical shape of which the major axis direction corresponds to the longitudinal direction of a handle when viewed from the tip part side of bristle bundles. The brush section includes a plurality of center bristle bundles arranged along the major axis direction at the center of the ellipse in the minor axis direction and a plurality of side bristle bundles arranged on both sides of the plurality of center bristle bundles in the minor axis direction. At least, the center bristle bundles are formed to be gradually inclined upwardly from both sides to the center of the ellipse in the major axis direction.

1 . A toothbrush comprising:
 a longitudinal handle;   a bristle implanting section having a bristle implanting surface formed at an end of the handle; and   a brush section including a plurality of bristle bundles composed of a large number of bristles implanted on the bristle implanting surface, the toothbrush cleaning a tooth with the brush section,   wherein the bristle implanting section is formed so that the bristle implanting surface is in an elliptical shape having a major axis direction and a minor axis direction when viewed from a tip part side of the bristle bundles,   wherein the brush section includes as the bristle bundles, a plurality of center bristle bundles arranged along the major axis direction at a center of the ellipse in the minor axis direction and a plurality of side bristle bundles arranged on both sides of the plurality of the center bristle bundles in the minor axis direction, and   wherein at least the center bristle bundles are formed in a chevron shape so as to be gradually inclined upwardly from both sides toward the center of the ellipse in the major axis direction.   
     
     
         2 . A toothbrush comprising:
 a longitudinal handle;   a bristle implanting section having a bristle implanting surface formed at an end of the handle; and   a brush section including a plurality of bristle bundles composed of a large number of bristles implanted on the bristle implanting surface,   wherein in the toothbrush cleaning a tooth by using the brush section, the bristle implanting section is formed so that the bristle implanting surface is in an elliptical shape having a major axis direction and a minor axis direction when viewed from a tip part side of the bristle bundles,   wherein the brush section includes as the bristle bundles, a top bristle bundle positioned at a center of the ellipse in the major axis direction and in the minor axis direction, the top bristle bundle being the highest of the plurality of the bristle bundles, a plurality of center bristle bundles arranged on both sides of the top bristle bundle along the major axis direction and a plurality of side bristle bundles arranged on both sides of the center bristle bundles in the minor axis direction,   wherein at least the plurality of the center bristle bundles are formed in a chevron shape so as to be gradually inclined upwardly from both ends in the major axis direction toward the top bristle bundle, and   wherein the tip part of the top bristle bundle is at a higher position than an intersecting point of ridgelines formed by connecting tip parts of the center bristle bundles.   
     
     
         3 . A toothbrush according to  claim 2 , wherein a number of bristles constituting the top bristle bundle is larger than a number of one of the center bristle bundles and the side bristle bundles. 
     
     
         4 . A toothbrush according to  claim 1 , wherein the bristle implanting section is in an elliptical shape of which the major axis direction corresponds to the longitudinal direction of the handle. 
     
     
         5 . A toothbrush according to  claim 1 , wherein the side bristle bundles include in the minor axis direction, first center bundles arranged on a side closer to the center bristle bundles and second bristle bundles arranged on a side farther from the center bristle bundles. 
     
     
         6 . A toothbrush according to  claim 5 , wherein the first side bristle bundles are higher than the neighboring second side bristle bundles. 
     
     
         7 . A toothbrush according to  claim 1 , wherein the center bristle bundles are higher than the neighboring side bristle bundles.