| 摘要 |
PROBLEM TO BE SOLVED: To prevent a fuse solder from slipping off a board to lose a fuse function at the abnormal time when a large current flows into a resistor circuit. SOLUTION: A fuse base 16 is provided in the middle of a resistor circuit 2 on an enamel board 1, and a fuse solder 7 is provided on the fuse base 16, constituting a temperature fuse 14. The fuse base 16 for installing the fuse solder 7 is composed of an assembly of multiple fine bases 17 distributed continuously in plane with fine gaps at a discontinuous part formed on the resistor circuit 2. In such abnormal time as a large current flows into the resistor circuit 2, no large current flows into the assembly of the fine bases 17 itself to discourage temperature rising of the fine bases 17. Thus, melting of such solder part 7 as contacts the fine base 17 is delayed to retain the solder, preventing it from slipping off the board. COPYRIGHT: (C)2004,JPO
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