Hinge device capable of extending rotational angle

A hinge device, comprising:

• a housing comprising two half-housings, each of the half-housings having two extending plates extending from two ends thereof for mounting to an electronic device, the half-housings are assembled to form an inner space, and each of the half-housings having a stroke groove and a curved groove in a corresponding position;
• a first extending module, adapted to be connected to a stand of the electronic device, comprising two half-members disposed in the inner space, each of the half-members has a curved portion at one end thereof;
• a torque-stroke controlling mechanism having one end pivotally connected between the half-members and the other end at which a first shaft is disposed, and the shaft pivotally and slidably extends through the stroke grooves of the two half-housings;
• a second extending module comprising two half sliding members slidably disposed on respective outer sides of the first extending module, each of the half sliding member having a push portion disposed on one end thereof and facing a bottom of the first extending module, a stop portion disposed behind the push portion, and a guiding tab having a curved shape and a predetermined length disposed on the other end thereof and slidably engaging the respective curved groove;
• a sliding device disposed between the first extending module and the second extending module;
• an elastic member having one end disposed between the half-housings and the other end biasing the second extending module;
• and
• a stop sheet disposed between the half-housings and having one end facing a bottom of the second extending module for limiting the relative movement between the second extending module and the housing.