| 摘要 |
PROBLEM TO BE SOLVED: To provide a dc relay which can be miniaturized with a simple structure, and also can interrupt dc in a plurality of pairs of contacts in a short time. SOLUTION: This dc relay has a plurality of pairs of contacts which can be opened and closed while having a stationary contact on one side and a movable contact on the other, and a single solenoid 200 to open and close each pair of contacts. The exciting coil of this solenoid has a variable mechanism capable of varying ampere-turns. As a concrete example of this variable mechanism, the exciting coil 250 is divided into a plurality of sub-coils (a first coil 251, a second coil 252), each sub-coil only or both sub-coils are excited to make driving force of the drive shaft 210 of the solenoid variable. COPYRIGHT: (C)2005,JPO&NCIPI
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