Patent ID: 8063319

Claim:
An electrical junction box comprising: a casing including: a lower casing member with a rib assembly and a boss, the rib assembly and the boss projecting from the lower casing member; and an upper casing member; a multilayered circuit board assembly contained in the casing, the multilayered circuit board comprising: a lower layer circuit board; an upper layer circuit board; and an insulation plate disposed between the upper layer circuit board and the lower layer circuit board; and an electronic component mounted on a top surface of the lower layer circuit board and through the insulation plate without contacting a bottom surface of the upper layer circuit board, wherein the upper layer circuit board and the lower layer circuit board are secured to the insulation plate, and the rib assembly and the boss of the lower casing member contact the insulation plate to support the insulation plate without contacting a surface of the upper layer circuit board and without contacting a surface of the lower circuit board in the multilayered circuit board assembly on which the electronic component is mounted.