Hinge module and electronic device including the same

1. An electronic device comprising:

a first housing and a second housing configured to rotate with respect to each other between a first position at which the first housing and the second housing are disposed to face each other and a second position at which the first housing and the second housing are unfolded from the first position at a specified angle with respect to each other; and

a hinge module including a hinge disposed between the first housing and the second housing and configured to couple the first housing and the second housing to be rotatable with respect to each other,

wherein the hinge module comprises:

a first hinge plate coupled with the first housing and disposed to be rotatable around a first rotation axis;

a second hinge plate coupled with the second housing and disposed to be rotatable around a second rotation axis parallel to the first rotation axis;

a rotation plate disposed to be rotatable around a rotation axis perpendicular to the first rotation axis or the second rotation axis;

a first interlocking assembly including at least one of a slider, a link or a connection pin configured to couple the first hinge plate and the rotation plate to each other; and

a second interlocking assembly including at least one of a slider, a link or a connection pin configured to couple the second hinge plate and the rotation plate to each other, and

wherein, the first hinge plate and the second hinge plate are configured to be interlocked with each other by the rotation plate, the first interlocking assembly, and the second interlocking assembly to rotate between the first position and the second position as the first housing and the second housing rotate.

2. The electronic device of claim 1 , further comprising: a flexible display including a first region disposed in the first housing, a second region disposed in the second housing, and a folding region corresponding with a region in which the hinge module is disposed and configured to connect the first region and the second region to each other,

wherein the first region and the second region are disposed to face each other at the first position, and

wherein, the folding region is configured to be deformed between a curved shape and a flat shape as the first housing and the second housing rotate.

3. The electronic device of claim 1 , wherein the hinge module further comprises a hinge bracket, and

wherein the first hinge plate and the second hinge plate are coupled to be rotatable with the hinge bracket.

4. The electronic device of claim 3 , further comprising a hinge cover at least partially disposed between the first housing and the second housing,

wherein the hinge bracket is mounted inside the hinge cover.

5. The electronic device of claim 3 , wherein the hinge module further comprises:

at least one first hinge arm formed on the first hinge plate and at least partially accommodated in the hinge bracket;

a first link arm formed on the first hinge plate and disposed adjacent to the first hinge arm;

at least one second hinge arm formed on the second hinge plate and at least partially accommodated in the hinge bracket; and

a second link arm formed on the second hinge plate and disposed adjacent to the second hinge arm, and

wherein the rotation plate is coupled to be rotatable with the hinge bracket between the first hinge arm and the second hinge arm or between the first link arm and the second link arm.

6. The electronic device of claim 5 , wherein the first interlocking assembly or the second interlocking assembly comprises:

a slider coupled with the rotation plate and configured to rotate around a third rotation axis along with rotation of the rotation plate;

a link configured to rotate around the slider, while surrounding at least a part of the slider; and

a connection pin disposed in parallel to the slider and locked with any one of the first link arm and the second link arm through the link.

7. The electronic device of claim 5 , wherein the hinge module further comprises:

a rotation guide groove extending along an arc trajectory around one of the first rotation axis and the second rotation axis and formed in at least one of the first hinge arm or the second hinge arm; and

a plurality of rotation rails extending along the arc trajectory around one of the first rotation axis and the second rotation axis and formed in the hinge bracket, and

wherein the rotation rails are configured to guide rotation of the first hinge plate or the second hinge plate in the rotation guide groove along the arc trajectory.

8. A hinge module comprising:

a first hinge plate disposed to be rotatable around a first rotation axis;

a second hinge plate disposed to be rotatable around a second rotation axis parallel to the first rotation axis;

a rotation plate disposed to be rotatable around a rotation axis perpendicular to the first rotation axis or the second rotation axis;

a first interlocking assembly including at least one of a slider, a link or a connection pin configured to couple the first hinge plate and the rotation plate to each other; and

a second interlocking assembly including at least one of a slider, a link or a connection pin configured to couple the second hinge plate and the rotation plate to each other,

wherein the first hinge plate and the second hinge plate are configured to be interlocked with each other by the rotation plate, the first interlocking assembly, and the second interlocking assembly to rotate between a first position at which the first hinge plate and the second hinge plate face each other and a second position at which the first hinge plate and the second hinge plate are unfolded from the first position at a specified angle with respect to each other.

9. The hinge module of claim 8 , wherein the first hinge plate and the second hinge plate are disposed in parallel to the rotation axis at the first position and in parallel to the rotation plate at the second position.

10. The hinge module of claim 8 , wherein, one of the first interlocking assembly and the second interlocking assembly is configured to rotate the rotation plate, as one of the first hinge plate and the second hinge plate rotates and

wherein, the other of the first interlocking assembly and the second interlocking assembly is configured to rotate the other of the first hinge plate and the second hinge plate as the rotation plate rotates.

11. The hinge module of claim 8 , wherein the first interlocking assembly or the second interlocking assembly comprises:

a slider coupled with the rotation plate and configured to rotate around a third rotation axis along with rotation of the rotation plate;

a link configured to rotate around the slider, while surrounding at least a part of the slider; and

a connection pin disposed in parallel to the slider and locked with any one of the first hinge plate and the second hinge plate through the link.

12. The hinge module of claim 11 , wherein, the slider is configured to rotate around the third rotation axis, while being maintained parallel to the first rotation axis or the second rotation axis as the rotation plate rotates.

13. The hinge module of claim 11 , wherein the rotation plate comprises a pair of rotation bosses protruding on one surface, and disposed apart from each other by a specified distance, and

wherein the slider is rotatably coupled with one of the rotation bosses.

14. The hinge module of claim 11 , wherein, the slider is configured to linearly reciprocate in a length direction, while being surrounded by the link as the rotation plate rotates.

15. The hinge module of claim 14 , further comprising an elastic member comprising an elastic material configured to provide compressive force surrounding an outer circumferential surface of the slider, while one end of the elastic member is supported by the slider and the other end thereof is supported by the link,

wherein, the elastic member is configured to be compressed or extended as the slider linearly reciprocates.