Patent ID: 8246208

Claim:
An electronic book comprising: a shell defining a housing; an illumination device received in the housing, comprising a support arm rotatablely connected to the shell, at least one light source fixed on the support arm, an opening mechanism connected to the support arm and being able to unfold from and fold to the support arm, and a light cover mounted on the opening mechanism and following the opening mechanism to unfold and fold; wherein the support arm defines a guiding groove axially defined in the center thereof, and receiving grooves axially aligned on the outer lateral surfaces, the opening mechanism comprises a guiding member, a supporting cap, an elastic member, holders, and stretching racks, wherein the guiding member is rotatablely disposed in the axial guiding groove, the supporting cap is fixed on the guiding member, the elastic member is fitted over the guiding member beneath the supporting cap, each of the stretching racks rotatablely connects with the supporting cap and one end of each of the holders, the other ends of the holders are rotatablely fixed in the receiving grooves, and the light cover is mounted on the stretching racks.