INSULATING STRUCTURE

PURPOSE:To satisfactorily insulate a shielding case from a board by forming a tongue at an insulating sheet for insulating the exposed conductive part of the board in the case from the case, and also insulating the conductive part out of the case. CONSTITUTION:The exposed conductive part of a board 14 shielded by a shielding case 2 with an upper cover 2 and a bottom 4 is insulated from the case 2 by an insulating sheet 22 of synthetic resin material. A tongue piece 26 protrudes from the sheet 22 out of the shielded part to insulate an exposed conductive part 10 protruding out of the case 2 from the case 2 to enhance the insulation while increasing the shielding effect.