A telescopic structure and an electronic device using the same

An electronic device and a telescopic structure used thereon are provided. The electronic device includes a housing, an annular inner wall, a sliding unit, a supporting base, and an elastic unit. The housing has a hole while the annular inner wall is formed within the hole. A continuous closed track is disposed on the annular inner wall, which includes a higher peak position, a lower peak position, and a first and a second depression positions respectively located between the higher and lower peak positions. The sliding unit is rotatably and axially movably enclosed within the annular inner wall. The sliding unit includes a guidance disposed on its outer wall. The guidance is engaged with and movable along the track. The supporting base is disposed at the end of the annular inner wall, which is also the bottom of the hole. The elastic unit is disposed on the supporting base and in contact with the bottom of the sliding unit.