Hinge device

1 . 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.

2 . The hinge device as claimed in claim 1 , wherein the third bevel gear comprises a first connection structure, and the driving member comprises a second connection structure engageable with the first connection structure.

3 . The hinge device as claimed in claim 2 , wherein the first connection structure comprises a first recess, and the second connection structure comprises a first protrusion corresponding to the first recess, and an inner wall of the first recess is beveled.

4 . The hinge device as claimed in claim 3 , wherein the second shaft comprises at least one first plane, the driving member comprises at least one second plane corresponding to the at least one first plane, a rotation of the driving member with respect to the second shaft is limited when the at least one first plane in contact with the at least one second plane.

5 . The hinge device as claimed in claim 1 , wherein the base comprises a first shaft hole provided for configuration of the first shaft, and a second shaft hole provided for configuration of the second shaft, and an axis of the first shaft hole is located on a plane different from that of the second shaft hole.

6 . The hinge device as claimed in claim 1 , wherein the driving member comprises a resisting block facing the base, and the base comprises a second recess positioned opposite the resisting block, with one side of the second recess forming a second protrusion.

7 . The hinge device as claimed in claim 1 , wherein the first shaft comprises a first stopping block, and the base comprises a second stopping block corresponding to the first stopping block for limiting a movement range of the first shaft.

8 . The hinge device as claimed in claim 7 , wherein the third bevel gear comprises a third stopping block, and the second shaft comprises a fourth stopping block corresponding to the third stopping block for limiting a movement range of the second shaft.

9 . The hinge device as claimed in claim 1 , wherein the first shaft is provided with a first torque assembly, and the second shaft is provided with a second torque assembly, and

wherein the first torque assembly and the second torque assembly are configured to determine rotational torques of the first shaft and the second shaft, respectively.