Applicator

Abstract

An applicator is provided. The applicator includes a brush rod, where M rows of bristles are arranged on the brush rod; the bristles each have an upper surface and a lower surface opposite to each other; the bristle includes a first end fixedly connected to the brush rod, and a second end being a free end; the second end of the bristle extends toward a direction away from the brush rod; there are N bristles in each row of bristles; target points on sections of at least two of the bristles are located on a same spiral line; and the first ends of the bristles in a same row are located in a same axial direction of the brush rod, M≥2, N≥2, and M and N each being an integer.

What is claimed is: 
     
         1 . An applicator, comprising a brush rod, wherein M rows of bristles are arranged on the brush rod;
 the bristles each comprise a first end fixedly connected to the brush rod, and a second end being a free end;   the second end of the bristle extends toward a direction away from the brush rod;   there are N bristles in each row of bristles;   target points are respectively provided on sections of at least two of the bristles;   the target points are located on a same spiral line; and   the first ends of the bristles in a same row are located in a same axial direction of the brush rod, M≥2, N≥2, and M and N each being an integer.   
     
     
         2 . The applicator according to  claim 1 , wherein the bristles on the same spiral line comprise at least a first bristle and a second bristle; the first bristle belongs to an i-th row of bristles; and the second bristle belongs to a j-th row of bristles. 
     
     
         3 . The applicator according to  claim 1 , wherein target points are respectively provided on sections of the bristles in the same row, and the target points are located on the same spiral line. 
     
     
         4 . The applicator according to  claim 1 , wherein target points are respectively provided on sections of all of the bristles, and the target points are located on the same spiral line. 
     
     
         5 . The applicator according to  claim 1 , comprising at least two spiral lines, wherein a first group of target points are provided on sections of first bristles in the M rows of bristles; the first group of target points are located on a first one of the at least two spiral lines; a second group of target points are provided on sections of second bristles in the M rows of bristles; and the second group of target points are located on a second one of the at least two spiral lines. 
     
     
         6 . The applicator according to  claim 5 , wherein different spiral lines have a same pitch. 
     
     
         7 . The applicator according to  claim 1 , wherein the spiral line has a pitch of 0.5 mm to 1.5 mm. 
     
     
         8 . The applicator according to  claim 1 , wherein a side of the bristle comprises at least a curved surface and/or a twisted surface. 
     
     
         9 . The applicator according to  claim 1 , further comprising a brush handle, wherein the brush rod comprises a first end fixedly connected to the brush handle, and a second end being a free end; and the second end of the bristle inclines toward the second end of the brush rod. 
     
     
         10 . The applicator according to  claim 9 , wherein an inclination angle between a central axial section P of the bristle and a radial section Q of the brush rod is β, 1°<β<5°. 
     
     
         11 . The applicator according to  claim 9 , wherein the bristles in the same row have a same inclination angle toward the second end of the brush rod. 
     
     
         12 . The applicator according to  claim 11 , wherein the bristles in two adjacent rows have different inclination angles toward the second end of the brush rod. 
     
     
         13 . The applicator according to  claim 1 , wherein the bristle is a sheet structure, and an upper surface of the bristle is shaped as at least one of a petaloid structure with two small ends and a large middle, a polygonal structure, a semi-petaloid structure, and a notched petaloid structure. 
     
     
         14 . The applicator according to  claim 13 , wherein a sectional area of the first end of the bristle is greater than a sectional area of the second end of the bristle. 
     
     
         15 . The applicator according to  claim 1 , wherein there are at least two types of the bristles; different types of the bristles have different features; and the features of the bristles comprise at least one of a hardness, a color, a shape and a size. 
     
     
         16 . The applicator according to  claim 15 , wherein the bristles are a two-color injection molded plastic piece, a three-color injection molded plastic piece or a three-dimensional (3D) printed plastic piece. 
     
     
         17 . The applicator according to  claim 16 , wherein there are H types of the bristles; and the H types of the bristles comprise at least two types of bristles having different hardnesses, H≥2, and H being an integer. 
     
     
         18 . The applicator according to  claim 17 , wherein the bristles in the same row have a same hardness, and the bristles in two adjacent rows have different hardnesses. 
     
     
         19 . The applicator according to  claim 1 , wherein a connecting line for the second ends of the bristles in the same row comprises at least one of a linear segment and a curve. 
     
     
         20 . The applicator according to  claim 19 , wherein the connecting line for the second ends of the bristles in the same row comprises at least one of a raised arc, a recessed arc, a tailing peak, a leading peak, a multi-peak shape and an inverted V shape.