| 摘要 |
PURPOSE: A small electronic object to be worn on a wrist is provided to recharge the storage battery optimally by using an induction charge unit including the primary winding and the secondary winding, and to supply power by the rechargeable storage battery. CONSTITUTION: A portable device such as a watch being worn on the wrist of a user by a wrist band receives electric power by at least one rechargeable storage battery rechargeable with an inductive charging unit including a primary winding and a secondary winding(2). The portable device is characterized by containing the secondary winding in strands of the wrist band. Conductive lead wires(4,6,8) are arranged on the side of an insulating substrate(1) to form the second winding, and the second winding is formed with the rectangular outer lead wire. Other lead wires are arranged concentrically to the outer wire, and the insulating substrate is inserted to the strands of the wrist band.
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