Hinge device

A hinge device, comprising:

• a base;
• a first shaft, rotatably disposed on the base, and the first shaft comprising a first bevel gear;
• a second bevel gear, rotatably disposed on the base and engaged with the first bevel gear;
• and
• a second shaft, rotatably disposed on the base and being orthogonal to the first shaft, the second shaft provided with a third bevel gear engaged with the second bevel gear, a driving member slidably disposed on the second shaft and operatively engaged or disengaged with the third bevel gear, and an elastic member connected between the driving member and the base, wherein the elastic member assists the driving member in engaging with the third bevel gear,
• wherein the hinge device comprising a first state and a second state, when the hinge device is in the first state, the first shaft rotates and drives the third bevel gear to rotate without engaging with the driving member, and the second shaft does not rotate along with the third bevel gear;
• when the hinge device is in the second state, the third bevel gear engages with the driving member, and the first shaft and the second shaft rotate together;
• and the hinge device switches between the first state and the second state during continuously rotation of the first shaft,
• wherein the first shaft and the second shaft are configured to be connected to a first portion and a second portion of an electronic device, respectively, and
• wherein the first shaft rotates to change a first angle between the first portion and the second portion, and the second shaft rotates to change a second angle between a bottom side of the second portion and the central axis of the first axis.