Insulating support for electric device

An insulating support for an electric device, the insulating support insulating and supporting a main electric device body from below, the insulating support comprising:

• a pillar-shaped portion made of resin;
• a first metal insert buried in one end surface of the pillar-shaped portion in an axial direction;
• a second metal insert buried in the other end surface of the pillar-shaped portion in the axial direction;
• and
• one protrusion made of the resin and provided in a ring shape and integrally with the pillar-shaped portion on an outer circumferential surface of the pillar-shaped portion on a side of the first metal insert,
• wherein the first metal insert includes a first cylindrical base portion fixed to a mounting surface and a first distal end portion integrally provided at a distal end of the first base portion, the first distal end portion having an external surface including a convexly and smoothly curved surface,
• wherein the second metal insert includes a second cylindrical base portion fixed to the main electric device body and a second distal end portion integrally provided at a distal end of the second base portion, the second distal end portion having an external surface including a convexly and smoothly curved surface, and
• wherein a whole of the first distal end portion is disposed within an extended range of the protrusion in the axial direction.