Wire structure and method for designing the same

Abstract

A wire structure defined between a first plane and a second plane is provided. The first plane and the second plane are parallel to each other. The wire structure includes a main body and at least three convex portions. The main body has a center defined by its centroid and a periphery defined by the perimeter of the main body. The convex portions protrude from and are adjacently arranged around the periphery. At least one convex portion is tangent to the first plane, and at least two convex portions are tangent to the second plane. The number of the at least one convex portion tangent to the first plane is not equal to the number of the at least two convex portions tangent to the second plane.

What is claimed is: 
     
         1 . A method for designing a wire structure, comprising the steps of:
 setting N radial lines which radiate equiangularly outward from a center of a cross section of a wire main body;   setting a circular design line, wherein the circular design line has a center of circle defined by the center of the cross section of the wire main body and has a first radius; and   designing N identical convex portions, each having a cross section bilaterally symmetric with respect to a corresponding one of the radial lines, each said convex portion being an outward extension of the wire main body, the center of the cross section of the wire main body being equidistant from a centroid of the cross section of each said convex portion, the cross section of each said convex portion having an apex in contact with both the circular design line and the corresponding one of the radial line;   wherein N is an odd number greater than or equal to three;   wherein a vertical distance between any two parallel tangent lines to a boundary of a cross section of the wire structure is less than 2.01 mm.   
     
     
         2 . The method of  claim 1 , wherein the wire main body is a cylindrical main body having a cross section defined by a center of circle and a second radius, the center of circle of the cross section of the cylindrical main body being defined by the center of the cross section of the wire main body, the first radius being greater than the second radius. 
     
     
         3 . The method of  claim 2 , wherein each said convex portion is a portion of a cylinder, and a distance between a center of circle of a cross section of each said cylinder and the center of the cross section of the wire main body is the same and the distance between the center of circle of the cross section of each said cylinder and the center of the cross section of the wire main body is greater than the second radius. 
     
     
         4 . The method of  claim 2 , wherein each said convex portion is a portion of a cylinder, and a distance between a center of circle of a cross section of each said cylinder and the center of the cross section of the wire main body is the same and the distance between the center of circle of the cross section of each said cylinder and the center of the cross section of the wire main body is equal to the second radius. 
     
     
         5 . The method of  claim 2 , wherein each said convex portion is a portion of a cylinder, and a distance between a center of circle of a cross section of each said cylinder and the center of the cross section of the wire main body is the same and the distance between the center of circle of the cross section of each said cylinder and the center of the cross section of the wire main body is less than the second radius. 
     
     
         6 . The method of  claim 1 , wherein each said convex portion is defined by a circular arc, the circular arc being defined by a third radius, and the at least three convex portions are tangent to an externally tangent circle defined by the first radius greater than or equal to twice the third radius. 
     
     
         7 . The method of  claim 6 , wherein the first radius is less than 0.134 mm. 
     
     
         8 . The method of  claim 6 , wherein the third radius of the circular arc is between 0.045 and 0.0475 mm. 
     
     
         9 . A wire structure designed by a method of designing a wire structure, the steps of the method comprising:
 setting N radial lines which radiate equiangularly outward from a center of a cross section of a wire main body;   setting a circular design line, wherein the circular design line has a center of circle defined by the center of the cross section of the wire main body and has a first radius; and   designing N identical convex portions, each having a cross section bilaterally symmetric with respect to a corresponding one of the radial lines, each said convex portion being an outward extension of the wire main body, the center of the cross section of the wire main body being equidistant from a centroid of the cross section of each said convex portion, the cross section of each said convex portion having an apex in contact with both the circular design line and the corresponding one of the radial line;   wherein N is an odd number greater than or equal to three;   wherein a vertical distance between any two parallel tangent lines to a boundary of a cross section of the wire structure is less than 2.01 mm.   
     
     
         10 . The wire structure of  claim 9 , wherein each said convex portion is defined by a circular arc, the circular arc being defined by a third radius, and the at least three convex portions are tangent to an externally tangent circle defined by the first radius greater than or equal to twice the third radius. 
     
     
         11 . A wire structure defined between a first plane and a second plane parallel to the first plane, the wire structure comprising:
 a main body comprising a center and a periphery, wherein the center is defined by a centroidal axis of the main body, and the periphery is defined by a perimeter of the main body; and   at least three convex portions which protrude from and are adjacently arranged around the periphery;   wherein a distance between the first plane and the second plane is less than 2.01 mm.   
     
     
         12 . The wire structure of  claim 11 , wherein the number of the at least three convex portions is an odd number. 
     
     
         13 . The wire structure of  claim 11 , wherein the at least three convex portions are asymmetrically distributed about the center. 
     
     
         14 . The wire structure of  claim 11 , wherein a junction between a said convex portion and an exposed portion of the periphery forms a bend point in a cross section of the wire structure. 
     
     
         15 . The wire structure of  claim 11 , wherein at least one said convex portion being tangent to the first plane, at least two said convex portions being tangent to the second plane. 
     
     
         16 . The wire structure of  claim 15 , wherein the number of the at least one convex portion tangent to the first plane is not equal to the number of the at least two convex portions tangent to the second plane. 
     
     
         17 . The wire structure of  claim 11 , wherein each said convex portion is defined by a circular arc, the circular arc being defined by a third radius, and the at least three convex portions are tangent to an externally tangent circle defined by a first radius (R 1 ) greater than or equal to twice the third radius. 
     
     
         18 . The wire structure of  claim 17 , wherein the first radius is less than 0.134 mm. 
     
     
         19 . The wire structure of  claim 17 , wherein the third radius of the circular arc is between 0.045 and 0.0475 mm. 
     
     
         20 . The wire structure of  claim 11 , wherein the two adjacent convex portions are spaced by a spacing, the spacing substantially is between 0.012 and 0.021 mm.