| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of part items and ensure the arc extinguishment by integrally forming a wire stopper part on an arc antenna, and pressing and fixing the wire stopper part by a cover. SOLUTION: A wire stopper part 21 has a lateral width slightly larger than an arc runner 20, and can be inserted to a wire stopper groove 18 from above so as to be dropped therein. When a cover 19 is put and fixed onto the wire stopper part 21, the lower end of the cover 19 presses the wire stopper part 21, whereby the arc runner 20 is regularly laid in the state contact with a power source-side terminal 11. The lower end 22 of the arc runner 20 is inclined toward a contact 13, and the tip of the power source-side terminal 11 is turned under the lower end 22 of the arc runner 20. According to this structure, the arc generated between contacts 13 and 17 is easily transferred to the arc runner 20. Since the wire stopper part 21 is integrally formed on the arc runner 20, the number of part items can be reduced, and the assembling work can be facilitated.
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