Patent ID: 8471523

Claim:
A charging/discharging device comprising a housing comprising a front-half housing and a rear-half housing attached to each other, and having an inner room defined between the front-half housing and the rear-half housing; at least one plug hole formed through a peripheral wall of the housing and communicating with the inner room; and at least one button hole formed through the front-half housing and communicating with the inner room; a power module mounted in the inner room of the housing and having a first circuit board having a discharging circuit formed on the first circuit board; and at least one battery connected electrically to the discharging circuit of the first circuit board; and at least one retractable plug assembly mounted in the inner room of the housing, and each of the at least one retractable plug assembly having a second circuit board mounted slidably in the inner room of the housing and having a first end corresponding to a corresponding one of the at least one plug hole of the housing; a second end being opposite to the first end of the second circuit board; a sliding slot formed through the second circuit board and extending longitudinally between the first and second ends of the second circuit board; a first positioning hole formed through the second circuit board, disposed at an end of the sliding slot and communicating with the sliding slot; and a second positioning hole formed through the second circuit board, disposed at another end of the sliding slot and communicating with the sliding slot; a resilient element mounted in the inner room of the housing and having two ends respectively abutting the second end of the second circuit board and the housing; a second conductor electrically connecting the second circuit board to the discharging circuit of the first circuit board; a locker slidably mounted returnably through a corresponding one of the at least one button hole of the housing and having a button mounted slidably in the corresponding button hole of the housing and having an inner end corresponding to the inner room of the housing; and a shaft protruding from the inner end of the button, mounted slidably through the sliding slot of the second circuit board and having a locking protrusion formed around the shaft and selectively engaging one of the first and second positioning holes of the second circuit board; and a universal serial bus (USB) plug mounted securely on the first end of the second circuit board, connected electrically to the second circuit board, and corresponding to and selectively protruding through a corresponding one of the at least one plug hole of the housing.