Disclosed is an electronic apparatus. The electronic apparatus includes a first housing, a second housing, and a hinge structure connected to the first housing and the second housing. The hinge structure may include: a first arm shaft associated with the rotation of the first housing and parallel to the axial direction; a second arm shaft associated with the rotation of the second housing and parallel to the axial direction; a first arm cam and a second arm cam, which rotate together with the first arm shaft; a third arm cam and a fourth arm cam, which rotate together with the second arm shaft; a first cam member that includes a first moving cam fastened to the first arm cam and a second moving cam fastened to the third arm cam; a second cam member that includes a third moving cam fastened to the second arm cam and a fourth moving cam fastened to the fourth arm cam; a first elastic member coupled to the first arm shaft and disposed between the first cam member and the second cam member; and a second elastic member coupled to the second arm shaft and disposed between the first cam member and the second cam member. Various other embodiments that can be understood through the specification are also possible.

Disclosed is an electronic apparatus. The electronic apparatus includes a first housing, a second housing, and a hinge structure connected to the first housing and the second housing. The hinge structure may include: a first arm shaft associated with the rotation of the first housing and parallel to the axial direction; a second arm shaft associated with the rotation of the second housing and parallel to the axial direction; a first arm cam and a second arm cam, which rotate together with the first arm shaft; a third arm cam and a fourth arm cam, which rotate together with the second arm shaft; a first cam member that includes a first moving cam fastened to the first arm cam and a second moving cam fastened to the third arm cam; a second cam member that includes a third moving cam fastened to the second arm cam and a fourth moving cam fastened to the fourth arm cam; a first elastic member coupled to the first arm shaft and disposed between the first cam member and the second cam member; and a second elastic member coupled to the second arm shaft and disposed between the first cam member and the second cam member. Various other embodiments that can be understood through the specification are also possible.

According to certain embodiments, a foldable electronic device comprises: a first housing; a second housing; a hinge structure coupling the first housing and the second housing; and a flexible display, wherein at least a first portion of the flexible display is disposed on the first housing and a second portion of the flexible display is disposed on the second housing, wherein the hinge structure includes: a fixing member, a first rotary member coupled to the fixing member; a second rotary member coupled to the fixing member; a first rotary shaft, wherein one end of the first rotary shaft is held on one side of the fixing member; a second rotary shaft, wherein one end of the second rotary shaft is held on an opposite side of the fixing member; a first arm part coupled to the first rotary member, with the first rotary shaft is inserted therein; a first cam structure disposed is in the first arm part; a second arm part coupled to the second rotary member with the second rotary shaft inserted therein, a second cam structure disposed in the second arm part; and a first cam member including a first cam, with the first rotary shaft inserted in the first cam, and engaged with the first cam structure, a second cam, with the second rotary shaft inserted in the second cam, and engaged with the second cam structure, and a cam body connecting the first cam and the second cam.

A foldable display apparatus may include: a housing frame including a first frame and a second frame; a hinge assembly coupled to the first frame and the second frame to implement a folding and unfolding movement of the first frame and the second frame; and a display panel disposed on the first frame and the second frame. The hinge assembly may include: a plurality of hinge arms each coupled to one of the first frame and the second frame; a hinge housing disposed below the plurality of hinge arms and accommodating the plurality of hinge arms; and an arm cover disposed above the plurality of hinge arms and fastened with the hinge housing, the arm cover including a plurality of recessed guide units respectively corresponding to the plurality of hinge arms.

A foldable display apparatus may include: a housing frame including a first frame and a second frame; a hinge assembly coupled to the first frame and the second frame to implement a folding and unfolding movement of the first frame and the second frame; and a display panel disposed on the first frame and the second frame. The hinge assembly may include: a plurality of hinge arms each coupled to one of the first frame and the second frame; a hinge housing disposed below the plurality of hinge arms and accommodating the plurality of hinge arms; and an arm cover disposed above the plurality of hinge arms and fastened with the hinge housing, the arm cover including a plurality of recessed guide units respectively corresponding to the plurality of hinge arms.

A sliding component including a sidewall including at least one low stiffness projection capable of elastic deformation, and at least one high stiffness projection capable of plastic deformation, where the low stiffness projection includes a radial face at an innermost or outermost surface adapted to contact a neighboring component.

A sliding component including a sidewall including at least one low stiffness projection capable of elastic deformation, and at least one high stiffness projection capable of plastic deformation, where the low stiffness projection includes a radial face at an innermost or outermost surface adapted to contact a neighboring component.

Knuckle joint assembly for a medical device support system. The knuckle joint assembly includes a cartridge assembly that includes a cartridge housing and a rotary bearing. The cartridge housing includes a bore having a central axis and a bearing mount in the bore. The rotary bearing is press fitted in the bearing mount and configured to receive axially therethrough a spindle to rotatably support the spindle about the central axis. The knuckle joint assembly includes a retaining clip and a retaining pin. The retaining clip is selectively movable to disengage and engage a groove in a spindle to respectively support or release the spindle along a central axis. The retaining pin is movable between a first position to allow movement of the retaining clip between positions but prevent removal of the retaining clip, and a second position to block movement of the retaining clip from the engaged position.

A foldable display apparatus includes: a display panel; first and second set housings arranged in a first direction and supporting the display panel; and a hinge assembly disposed between and connected to the first and second set housings. The hinge assembly is configured to: rotate the first and second set housings inward to in-fold the display panel so that the display panel is disposed between the first set housing and the second set housing; rotate the first and second set housings outward to out-fold the display panel so that the first set housing and the second set housing are disposed between the out-folded display panel; and position the first and second set housings flat to unfold the display panel so that the display panel is flat on the first set housing, the second set housing, and the hinge assembly.

A foldable display apparatus includes: a display panel; first and second set housings arranged in a first direction and supporting the display panel; and a hinge assembly disposed between and connected to the first and second set housings. The hinge assembly is configured to: rotate the first and second set housings inward to in-fold the display panel so that the display panel is disposed between the first set housing and the second set housing; rotate the first and second set housings outward to out-fold the display panel so that the first set housing and the second set housing are disposed between the out-folded display panel; and position the first and second set housings flat to unfold the display panel so that the display panel is flat on the first set housing, the second set housing, and the hinge assembly.