Molded stator with annular substrate having inner diameter smaller than stator core inner diameter and molded motor having the molded stator

A stator comprising:

• an annular stator core;
• a bobbin inserted into the stator core, the bobbin having a leg provided at an end surface in an axial direction of the stator core and extending in the axial direction, the leg including an outer-diameter leg provided in a vicinity of an outer-diameter side of the stator core and an inner-diameter leg provided in a vicinity of an inner-diameter side of the stator core;
• a coil wounded around the bobbin between the outer-diameter leg and the inner-diameter leg;
• an annular substrate including only one ring having an inner circumference and an outer circumference, the substrate having a substrate pattern on a surface of the substrate, an outer-diameter portion, and an inner-diameter portion, the outer-diameter portion including the outer circumference and being abutted against and attached to a tip end of the outer-diameter leg, an end of the coil being connected to the substrate, the inner-diameter portion including the inner circumference and having an inner diameter smaller than an inner diameter of the stator core along an entirety of the inner circumference of the inner-diameter portion;
• and
• stator resin providing sealing for a non-coil side of the outer-diameter leg, an outer-diameter side of the substrate, a non-bobbin side of the substrate, an inner-diameter side of the substrate, and filling a gap among a bobbin side of the substrate, the bobbin, and the coil, the substrate pattern being sealed by the stator resin,
• wherein a length in an axial direction of the inner-diameter leg is smaller than a length in the axial direction of the outer-diameter leg, and
• wherein the stator resin provided on the bobbin side of the substrate has a triangular-shaped cross-section having an inner-diameter first side surface extending in the axial direction from a tip end of the inner-diameter leg to the bobbin side of the substrate, a second side surface abutting and extending along a portion of the bobbin side of the substrate to an area adjacent to the tip end of the outer-diameter leg, and a third side surface extending from the area adjacent to the tip end of the outer-diameter leg to the tip end of the inner-diameter leg.