Refrigerator

1. A refrigerator comprising:

a main body having an opening on a front side;

an upper opening and a lower opening divided in the main body by a partition wall;

an upper door to open and close the upper opening;

a lower door to open and close the lower opening; and

a hinge mechanism configured so that the upper door and the lower door are rotatably coupled with respect to the main body,

wherein the hinge mechanism comprises a multiaxial hinge, and

wherein the multiaxial hinge comprises:

a first hinge disposed below the upper door;

a second hinge disposed above the lower door;

a main body-side member fixed to the main body and connecting the first hinge and the second hinge;

a first door-side member fixed to the upper door;

a second door-side member fixed to the lower door;

a first link mechanism including a plurality of first shaft members, and configured to connect the main body-side member and the first door-side member; and

a second link mechanism including a plurality of second shaft members, and configured to connect the main body-side member and the second door-side member,

wherein at least one shaft member of the plurality of first shaft members and the plurality of second shaft members is a common shaft member of the plurality of first shaft members and the plurality of second shaft members,

wherein the main body-side member comprises:

an upper protrusion connected to the first link mechanism; and

a lower protrusion connected to the second link mechanism; and

the multiaxial hinge further comprises:

a reinforcing member between the upper protrusion and the lower protrusion and supporting a central portion of the common shaft member.

2. The refrigerator according to claim 1 , wherein

the first hinge is provided to be rotatable by the plurality of first shaft members, and

the second hinge is provided to be rotatable by the plurality of second shaft members.

3. The refrigerator according to claim 1 , wherein

the first link mechanism comprises a plurality of first links,

the plurality of first links are rotatably connected to the main body-side member, the first door-side member, or a first link of the plurality of first links, and

at least one first link of the plurality of first links comprises a concave portion to accommodate a first shaft member of the plurality of first shaft members provided on a second link of the plurality of first links depending on rotation.

4. The refrigerator according to claim 1 , wherein

the main body-side member, the first link mechanism, and the second link mechanism are arranged to be symmetric up and down.

5. The refrigerator according to claim 1 , wherein

each first shaft member of the plurality of first shaft members and each second shaft member of the plurality of second shaft members has a same shape.

6. The refrigerator according to claim 1 , wherein

the multiaxial hinge is mounted on the main body symmetrically left and right.

7. The refrigerator according to claim 1 , wherein

the multiaxial hinge is connected by the main body-side member, the plurality of first shaft members, and the plurality of second shaft members.

8. The refrigerator according to claim 1 , further comprising:

a third hinge disposed above the upper door; and

a fourth hinge disposed below the lower door, wherein

strengths of the third hinge and the fourth hinge are greater than strengths of the first hinge and the second hinge.

9. The refrigerator according to claim 1 , wherein a strength of the first hinge and a strength of the second hinge are different from each other.

10. The refrigerator according to claim 9 , wherein

the multiaxial hinge is mounted on the main body symmetrically left and right or symmetrically up and down.

11. The refrigerator according to claim 1 , wherein

the upper door comprises an upper door closing surface to close the upper opening,

the lower door comprises a lower door closing surface to close the lower opening,

the first door-side member is disposed on a surface different from the upper door closing surface, and

the second door-side member is disposed on a surface different from the lower door closing surface.

12. The refrigerator according to claim 1 , wherein

the second link mechanism comprises a plurality of second links,

the plurality of second links are rotatably connected to the main body-side member, the second door-side member, or a second link of the plurality of second links, and

at least one second link of the plurality of second links comprises a concave portion to accommodate a second shaft member of the plurality of second shaft members provided on a third link of the plurality of second links depending on rotation.