| 摘要 |
PROBLEM TO BE SOLVED: To enable the supply of high voltage to load and the elimination of a contact by lightening a charger. SOLUTION: This cordless apparatus comprises a body 101 which has a booster circuit 106 having a choke coil 120 and an accumulation element 105, and a charger 102 having a DC power source 133, an excitation coil 142, and the second switching element 140, and it enables the excitation coil 142 to be charged with electricity without a contact, by being coupled magnetically with the choke coil 120 at charge, thus a light-weight device, which can supply load with a voltage higher than the accumulation element 105 at use, can be realized. COPYRIGHT: (C)2003,JPO
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