| 摘要 |
<p>PROBLEM TO BE SOLVED: To easily switch a power source from an internal power source to an external power source only with plug insertion/detaching by providing fixed and movable terminals in a body, separating the movable terminal from the fixed terminal, when a plug is inserted into a plug insertion hole and cutting off a control circuit from the internal power source. SOLUTION: When a first plug 2 is inserted into a plug insertion hole 11, an internal electrode 22 connected to the plus electrode of a first external power source and an external electrode 23 connected to a negative electrode are respectively contacted with first and second power source terminals 3 and 4, and first external power is supplied to a control circuit. At this time, for the movable terminal 6, a contact part 64 is contacted with a plug 2 to bend one of opposing pieces 61, and a contact part 63 is separated from a fixed terminal 5. That is, a first switch is opened, and then the control circuit is switched from the internal power source to the first external power source. When a second plug is inserted into a recessed part 14, a pair of plug posts are contacted with contacts 7a and 7a, and the control circuit is switched from the internal power source to the second external power source.</p> |
