Driving device casing, driving device, camera device and electronic apparatus

A driving device housing made of permeability magnetic material, polygonal in outer shape, and with an axial direction, comprising:

• an outer peripheral side wall and a housing top wall connected to a front side of the outer peripheral side wall, the housing top wall being provided with an opening allowing light to pass through;
• and
• at least one step portion comprising a first step portion and a second step portion at each corner portion thereof,
• wherein the first step portion comprises:
• a first step vertical wall extending from an outer peripheral side of the housing top wall toward a rear side, and
• a first step horizontal wall extending from a rear side of the first step vertical wall in a direction intersecting with the axial direction;
• the second step portion comprises:
• a second step vertical wall extending from the first step horizontal wall toward a rear side, and
• a second step horizontal wall extending from a rear side of the second step vertical wall in a direction intersecting with the axial direction;
• and,
• a magnet mounting portion is formed by an inner peripheral wall surface of the second step vertical wall and an inner peripheral wall surface of the outer peripheral side wall adjacent thereto.