Electronic apparatus and hinge

1. An electronic apparatus comprising:

a first housing and a second housing rotating about a rotational axis; and

a hinge including

a first link rotatably attached to the first housing at one end thereof,

a second link attached to the second housing with a pin at one end thereof,

a first arm rotatably attached to the second housing at one end thereof and rotatably attached to the first link at another end thereof, and

a second arm rotatably attached to the first housing at one end thereof and rotatably attached to the second link at another end thereof.

2. An electronic apparatus according to claim 1 , wherein

the first housing or the second housing is rotated by the hinge depending on the usage of the electronic apparatus; and

the hinge is inserted into the first housing or the second housing when the first housing or the second housing is rotated.

3. An electronic apparatus according to claim 2 , wherein the first link and the second link of the hinge are different from each other in terms of straight length.

4. An electronic apparatus according to claim 3 , wherein

the first arm and the second arm of the hinge have a curved shape; and

the first link and the second link of the hinge have a straight shape.

5. An electronic apparatus according to claim 4 , wherein

the first housing is a housing including a display; and

the second housing is a housing including a keyboard, the electronic apparatus including the first housing and the second housing serving as a notebook type personal computer.

6. A hinge comprising:

a first link rotatably attached to a first housing at one end thereof;

a second link attached to a second housing with a pin at one end thereof;

a first arm rotatably attached to the second housing at one end thereof and rotatably attached to the first link at another end thereof; and

a second arm rotatably attached to the first housing at one end thereof and rotatably attached to the second link at another end thereof.