Hinge structure and electronic device including the same

An electronic device comprising:

• a housing which comprises a first housing and a second housing and is configured to be foldable;
• a flexible display supported by the first housing and the second housing;
• and
• a hinge structure connected to the first housing and the second housing, wherein the hinge structure comprises:
• a first cam structure configured to provide a first rotational force to the first housing,
• a second cam structure configured to provide a second rotational force to the second housing,
• a first body connected between the first cam structure and the first housing, a first gear being formed on a portion of the first body, and a cam structure being formed at an end of the first gear and configured to engage with the first cam structure,
• a second body connected between the second cam structure and the second housing, a second gear being formed on a portion of the second body, and a cam structure being formed at an end of the second gear and configured to engage with the second cam structure,
• a first pressing member configured to provide an elastic force to the first cam structure in a direction parallel to a rotating shaft of the first gear, the first cam structure and the cam structure formed on the first gear being configured to engage with and disengage from each other in response to the elastic force,
• a second pressing member configured to provide an elastic force to the second cam structure in a direction parallel to a rotating shaft of the second gear, the second cam structure and the cam structure formed on the second gear being configured to engage with and disengage from each other in response to the elastic force, and
• an idle gear positioned between the first gear and the second gear, a first operation of the first gear and a second operation of the second gear being configured to interwork with each other via the idle gear.

A hinge structure for rotatably connecting a first housing and a second housing, the hinge structure comprising:

• a first auxiliary hinge part connected to the first housing;
• a second auxiliary hinge part connected to the second housing;
• an idle gear;
• a first gear configured to engage with the idle gear in a first direction with respect to the idle gear;
• a second gear configured to engage with the idle gear in a second direction opposite to the first direction with respect to the idle gear;
• a first body disposed in the first direction with respect to the idle gear, integrally formed with the first gear to rotate with respect to the idle gear according to a rotation of the first gear, and slidably connected to the first auxiliary hinge part;
• and
• a second body disposed in the second direction with respect to the idle gear, integrally formed with the second gear to rotate with respect to the idle gear according to a rotation of the second gear, and slidably connected to the second auxiliary hinge part.

An electronic device comprising:

• a first auxiliary hinge part connected to a first housing and a second auxiliary hinge part connected to a second housing, each of the first auxiliary hinge part and the second auxiliary hinge part comprising an opening to receive a pivot shaft;
• and
• a hinge structure configured to foldably connect the first housing and the second housing,
• wherein the hinge structure comprises:
• a first body and a second body, each of the first body and the second body comprising a pivot shaft engaged with a respective opening of the first auxiliary hinge part and the second auxiliary hinge part,
• a first gear and a second gear configured to rotate the first body and the second body, respectively, along parallel axes with a bending radius of curvature based on a distance between the first gear and the second gear, and
• a first interconnecting structure formed between the first gear and the second gear to enable the first gear and the second gear to engage each other.