Armature and motor

An armature comprising:

• an armature core having an annular shape;
• and
• a plurality of coils arranged along the armature core, each of the coils being a wound conductive winding,
• each of the coils comprising:
• a pair of first and second facing portions disposed to be aligned in a circumferential direction with a predetermined interval therebetween, the first and second facing portions of each of the coils constituting intermediate portions of the corresponding one of the coils;
• and
• a pair of first and second coil end portions that link the first and second facing portions to each other;
• and
• an insulator arranged between the armature core and the coils,
• the insulator comprising:
• a base comprised of an insulating material;
• one or more soft-magnetic members each being comprised of a soft-magnetic material, the one or more soft-magnetic members being contained in the base;
• and
• first and second coil-end intervention members,
• the first coil-end intervention member being arranged between the first coil end portion and the armature core,
• the second coil-end intervention member being arranged between the second coil end portion and the armature core,
• the one or more soft-magnetic members being contained at least in each of the first and second coil-end cover members,
• wherein:
• each of the first and second coil-end intervention members has a facing surface facing the armature core;
• the insulator further comprises:
• a first void formed along the facing surface of the first coil-end intervention member, so that the first coil-end intervention member is separated from the armature core;
• and
• a second void formed along the facing surface of the second coil-end intervention member, so that the second coil-end intervention member is separated from the armature core;
• the facing surface of each of the first and second coil-end intervention members has formed thereon a first edge defined as an inner periphery of the first void, the first edge being disposed to be in contact with the armature core;
• and
• the facing surface of each of the first and second coil-end intervention members has formed thereon a second edge defined as an outer periphery of the second void, the second edge being disposed to be in contact with the armature core.