Patent ID: 8253375

Claim:
A battery charger comprising: a bottom case comprising a bottom surface; a cover attached on the case and defining a curved groove and two openings extending therethrough; a seat fixed on a bottom surface of the case and comprising a first inclined surface inclined relative to the bottom surface; a slider slidably arranged in the bottom case and comprising two spring contacts aligned with the two openings, respectively, the slider being slidable to a position where the spring contacts protrude out of the two openings; a driving member arranged in the bottom case and comprising a post protruding out of the curved groove; a mating member comprising a second inclined surface inclined relative to the bottom surface and engaging the first inclined surface; a first means for allowing the mating member to slidably connect the mating member to the driving member and allowing the mating member to rotate together with the driving member; and a second means for allowing the slider to move together with the mating member; wherein, the mating member rotates as the post moves along the curved groove, causing the second inclined surface of the mating member to move against the first inclined surface from a lower position to a higher position, which further causes the spring contacts to protrude out of the two openings.