| 摘要 |
A reel type power bank includes a predetermined shaped housing with an accommodating space, at least one rechargeable battery installed on a side of the accommodating space, a control circuit board electrically coupled to rechargeable battery and having a DC-to-DC power conversion circuit for regulating an output voltage of the rechargeable battery, a USB output interface coupled to DC-to-DC power conversion circuit, and a reel built in the housing, and installed on a side of the control circuit board, and including a winder and a charging cable wound around the winder. The charging cable has an outer end coupled to a USB plug and an inner end extended from the winder and out of the storage case, and electrically coupled to the DC-to-DC power conversion circuit, such that the charging cable can be pulled out for use or wound and hidden into the housing of the power bank. |
| 主权项 |
1. A reel type power bank, comprising:
a housing, being a determined-shaped body, and having an accommodating space therein; at least one rechargeable battery, installed on a side of the accommodating space; a control circuit board, installed in the housing and at an end corner opposite to the other side of the rechargeable battery, and having an inner side electrically coupled to the rechargeable battery, and further comprising: a charging input interface, coupled to the control circuit board, for inputting a charging power; a switch, coupled to the charging input interface, and electrically coupled to the rechargeable battery; a micro control unit (MCU), coupled to the switch; a constant voltage/constant current circuit, coupled to the MCU; a direct current to direct current (DC-to-DC) power conversion circuit, coupled to the constant voltage/constant current circuit and the switch; a universal serial bus (USB) output interface, coupled to the DC-to-DC power conversion circuit, and having a portion exposed from a surface of the housing, for outputting electric power; and a reel, built in the housing, and installed on a side of the control circuit board, and including a storage case, a winder disposed in the storage case, and a charging cable wound around the winder, and an outer end of the charging cable being extended from a notch formed at the periphery of the storage case and coupled to a USB plug, and an inner end of the charging cable being extended from the winder and out of the storage case, and electrically coupled to the DC-to-DC power conversion circuit, and the winder being rotatable clockwise or counterclockwise in the storage case, such that the charging cable can be pulled out for use or wound and hidden into the housing of the power bank. |
