| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a circuit constriction corresponding to a popular car only by eliminating some components without adding spacers and change the circuit construction easily so as to correspond to the popular car by the reduction of the number of components and assembly man-hours. SOLUTION: A junction box has a base circuit layer 10 which can be used for the cars of various grades in common, a high grade layer 30 exclusively for a high end car and an insulating board 20 isolating the base circuit layer 10 and the high grade circuit layer 30 from each other in its case 40. Bus-bars 32 are laid in a board part 41 of which the case 40 consists to compose the high grade circuit layer 30 and, further, the whole lengths of welding bosses 41b to which the bus-bars 32 are welded to be held are equal to the thickness of the insulating board 20 before welding.</p> |
