Bus bar structure of electric distribution box

1. A bus bar provided in an electric distribution box through which electric power from an alternator is supplied to a fusible link comprising:

a connection bus bar to be connected to a power supply terminal connected to the alternator;

a first bus bar forming a path for supplying necessary supply electric power for a maximum load condition from the connection bus bar; and

a second bus bar forming a path for supplying an excess electric power, generated by the alternator, over the necessary supply electric power for the maximum load condition;

wherein said first bus bar is different in width from said second bus bar.

2. The bus bar according to claim 1 , wherein the connection bus bar, the first bus bar and the second bus bar are integrally formed.

3. The bus bar according to claim 2 , wherein the first and second bus bar are directly connected to the connection bus bar, respectively.

4. The bus bar according to claim 2 , wherein the connection bus bar is interposed between the first and second bus bars.

5. The bus bar according to claim 1 , wherein the connection bus bar, the first bus bar and the second bus bar jointly assume a generally U-shape.

6. The bus bar according to claim 5 , wherein the first bus bar is mounted in the electric distribution box in contiguous relation to an inner surface of a wall of the electric distribution box;

the second bus bar is viewed through an opening portion extending upwardly beyond an upper edge of the first bus bar; and

the second bus bar is fixed by a fixing member to a fusible link-receiving portion of the electric distribution box through the opening portion together with the fusible link.

7. The bus bar structure according to claim 1 , wherein the first bus bar is formed into such a width capable of supplying the necessary supply electric power for the maximum load condition and various on-vehicle electronic equipments are connected to the first bus bar; and

the second bus bar is formed into such a width capable of supplying the maximum excessive proportion of the maximum electric power and an automotive battery is connected to the second bus bar.

8. A system, including:

the bus bar structure according to claim 1 ;

the electric distribution box; and

a fusible link-receiving portion of the electric distribution box;

wherein the first bus bar is mounted in the electric distribution box in contiguous relation to an inner surface of a wall of the electric distribution box;

the second bus bar is viewed through an opening portion extending upwardly beyond an upper edge of the first bus bar; and

the second bus bar is fixed by a fixing member to the fusible link-receiving portion of the electric distribution box through the opening portion together with the fusible link.

9. A system, including:

the bus bar structure according to claim 1 ;

various on-vehicle electronic equipments; and

an automotive battery;

wherein the first bus bar is formed into such a width capable of supplying the necessary supply electric power for the maximum load condition, and the various on-vehicle electronic equipments are connected to the first bus bar; and

the second bus bar is formed into such a width capable of supplying the excess electric power and the automotive battery is connected to the second bus bar.

10. A system, including:

an electric distribution box;

a fusible link-receiving portion of the electric distribution box; and

a bus bar structure, provided in the electric distribution box through which electric power from an alternator is supplied to a fusible link, comprising;

a connection bus bar to be connected to a power supply terminal connected to the alternator;

a first bus bar forming a path for supplying necessary supply electric power for a maximum load condition from the connection bus bar; and

a second bus bar forming a path for supplying an excess electric power generated by the alternator, over the necessary supply electric power for the maximum load condition;

wherein the first bus bar is formed into such a width capable of supplying the necessary supply electric power for the maximum load condition, and a various on-vehicle electronic equipments are connected to the first bus bar; and

the second bus bar is formed into such a width capable of supplying the excess electric power and an automotive battery is connected to the second bus bar.

11. A system, including:

various on-vehicle electronic equipments;

an automotive battery; and

a bus bar structure provided in an electric distribution box through which electric power from an alternator is supplied to a fusible link, comprising

a connection bus bar to be connected to a power supply terminal connected to the alternator;

a first bus bar forming a path for supplying necessary supply electric power for a maximum load condition from the connection bus bar; and

a second bus bar forming a path for supplying an excess electric power generated by the alternator, over the necessary supply electric power for the maximum load condition;

wherein the first bus bar is formed into such a width capable of supplying the necessary supply electric power for the maximum load condition, and the various on-vehicle electronic equipments are connected to the first bus bar; and

the second bus bar is formed into such a width capable of supplying the maximum excessive proportion of the maximum electric power and the automotive battery is connected to the second bus bar.