Armature, rotating electric machine, cross-flow fan, and method for manufacturing pair of teeth of armature

An armature composing a rotating electric machine including a field element having (12±2)n poles, n being a positive integer, said armature comprising:

• 12n teeth arranged in a circumferential direction;
• and
• an armature coil concentratedly wound around each of said teeth,
• said teeth being divided into 6n tooth pairs, each of said tooth pairs including a pair of teeth adjacent in said circumferential direction,
• each of said teeth including a first end portion that is farther from said field element, and a second end portion that is closer to said field element,
• said armature coil being continuously wound around each of said tooth pairs and including:
• a first winding end existing at said first end portion of one of said pair of teeth;
• a second winding end existing at said first end portion of the other of said pair of teeth;
• a crossover portion;
• a first winding portion being wound around said one of said pair of teeth between said first winding end and said crossover portion;
• and a second winding portion being wound around the other of said pair of teeth between said crossover portion and said second winding end,
• wherein said armature coil in said first winding portion is wound in a first winding direction with respect to a direction obtained in viewing said second end portion from said first end portion of said one of said pair of teeth, as said armature coil passes from said first winding end to said crossover portion,
• said armature coil in said second winding portion is wound in a second winding direction with respect to a direction obtained in viewing said second end portion from said first end portion of the other of said pair of teeth, as said armature coil passes from said crossover portion to said second winding end,
• said first winding direction is opposite to said second winding direction;
• and
• a printed circuit board including:
• a wiring pattern mutually connecting said second winding end of a first one of said tooth pairs, said first winding end of a second one of said tooth pairs, and said first winding end of a third one of said tooth pairs;
• a wiring pattern mutually connecting said first winding end of said first one of said tooth pairs and said first winding end of a fourth one of said tooth pairs;
• a wiring pattern mutually connecting said second winding end of said second one of said tooth pairs and said second winding end of a fifth one of said tooth pairs;
• w
• a wiring pattern mutually connecting said second winding end of said third one of said tooth pairs and said second winding end of a sixth one of said tooth pairs,
• wherein said first winding portion of said first one of said tooth pairs, said second winding portion of said first one of said tooth pairs, said first winding portion of said third one of said tooth pairs, said second winding portion of said third one of said tooth pairs, said first winding portion of said fifth one of said tooth pairs, said second winding portion of said fifth one of said tooth pairs, said first winding portion of said fourth one of said tooth pairs, said second winding portion of said fourth one of said tooth pairs, said first winding portion of said sixth one of said tooth pairs, said second winding portion of said sixth one of said tooth pairs, said first winding portion of said second one of said tooth pairs, and said second winding portion of said second one of said tooth pairs are arranged in said circumferential direction in this order.