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1. A fuse unit used for a charging circuit installed in a vehicle to charge a first battery and a second battery mounted on the vehicle with electricity generated by a generator through driving of the vehicle, the fuse unit comprising:
an insulating unit body; a conductive circuit body integrally buried in the unit body, the circuit body including
a first battery connecting end connected to the first battery,an alternator connecting end connected to the generator, anda second battery connecting end connected to the second battery; and a fusible body, connected to the circuit body, for blocking a current flow path when an overcurrent flows therethrough, the fusible body including
a first fusible portion provided between the first battery connecting end and the alternator connecting end,a second fusible portion provided between the alternator connecting end and the second battery connecting end, anda third fusible portion provided between the alternator connecting end and an electrical component installed in the vehicle, the first battery connecting end being provided with an insertion hole into which a connecting bolt is inserted, the connecting bolt being attached to a battery terminal connected to a battery post of the first battery and projecting from an upper surface of the first battery, the alternator connecting end being provided with an alternator connecting bolt buried in the unit body and extending in a direction identical with that in which the battery terminal extends, the second battery connecting end being provided with a second battery connecting bolt buried in the unit body and extending in a direction identical with that in which the alternator connecting bolt extends, wherein the alternator connecting end comprises an integrated plate-like load-side terminal portion bent substantially at a right angle and hanging from an alternator terminal portion, the second battery connecting end comprises an integrated plate-like connecting terminal portion bent substantially at a right angle and hanging from a second battery terminal portion, the load-side terminal portion of the alternator connecting end and the connecting terminal portion of the second battery connecting end are provided with a second battery-side terminal portion and an alternator-side terminal portion, respectively, extending in a direction coming closer together, the second battery-side terminal portion and the alternator-side terminal portion are connected to each other via the second fusible portion, and the second battery connecting end is connected to the generator via the alternator connecting end such that the second battery connected with the second battery connecting end is charged by the generator and the second fusible portion prevents an overcurrent from flowing into the second battery. |
