Hinge structure and electronic device including the same

Abstract

An electronic device is disclosed. The electronic device includes a first housing, a second housing, a hinge structure connected to the first housing and the second housing such that the first housing rotates around a first rotation axis parallel to the axial direction and the second housing rotates around a second rotation axis parallel to the axial direction, and a display arranged to cover the first housing, the second housing, and the hinge structure. The hinge structure includes a first arm shaft extending in a direction parallel to the axial direction and rotating in response to the rotation of the first rotation structure, a second arm shaft extending in a direction parallel to the axial direction and rotating in response to the rotation of the second rotation structure, and a link structure configured to move linearly in the axial direction by the rotation of the first arm shaft and the second arm shaft. Various other embodiments are possible as understood by the specification.

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a hinge structure and an electronic device including the same. [Background technology]

[0002] Portable electronic devices such as smartphones provide various functions such as calling, video playback, and internet browsing based on various applications. Users may wish to utilize the various functions described above via a wider screen. However, larger screens can make devices less portable.

[0003] Therefore, in order to provide a wide screen while ensuring portability, foldable electronic devices including flexible displays in which a portion of the display can be bent into a curved or flat surface have been developed. The foldable electronic device includes a hinge structure that rotatably connects adjacent housings.

[0004] The hinge structure includes a gear interlocking structure that connects the first and second housings with gears so that the first and second housings can be folded in opposite directions at the same angle. For example, it includes a first gear corresponding to the rotation of the first housing, a second gear corresponding to the rotation of the second housing, and an idle gear connecting the first gear and the second gear. Due to the gear interlocking structure, backlash may occur between the meshing gears. Backlash can cause the first housing and the second housing to become uncoupled.

[0005] The hinge structure also includes a center bar that supports the rear surface of the display in the unfolded state. The center bar moves to accommodate the shape of the display. The center bar is coupled to each of the first housing and the second housing. Here, there is a possibility that the center bar will not be able to maintain its horizontal position due to the non-coupling of the first housing and the second housing. Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the problems with the conventional hinge structures described above, and an object of the present invention is to provide a hinge structure that can reduce backlash, thereby enabling smooth interlocking between the first and second housings and maintaining the horizontality of the center bar. [Means for solving the problem]

[0007] According to one embodiment of the present invention, an electronic device includes a first housing, a second housing, a hinge structure connected to the first housing and the second housing such that the first housing rotates about a first rotation axis R1 parallel to an axial direction and the second housing rotates about a second rotation axis R2 parallel to the axial direction, and a display arranged to cover the first housing, the second housing, and the hinge structure, wherein the display (140) includes a folding region (143) that is flat in an unfolded state and curved in a folded state, and the hinge structure extends in a direction parallel to the axial direction and is rotatably connected to the fixed structure and rotates in response to the rotation of the first rotation structure. a first arm shaft extending in a direction parallel to the axial direction, a second arm shaft rotatably connected to the fixed structure and rotating in response to rotation of the second rotating structure; a link structure including a first portion connected to the first arm shaft, a second portion connected to the second arm shaft, and a central portion connecting the first portion and the second portion, the link structure configured to move linearly in the axial direction in response to rotation of the first arm shaft and the second arm shaft; and a center bar at least partially overlapping the folding area of ​​the display when viewed from above, wherein the center bar is connected to the link structure and configured to move in a direction perpendicular to the axial direction in response to linear movement of the link structure.

[0008] The hinge structure according to one embodiment of the present invention includes a fixed structure, a first rotating structure coupled to a first guide rail of the fixed structure so as to be rotatable about a first rotating axis, a first arm shaft extending in a direction parallel to the first rotating axis and rotatably connected to the fixed structure, the first arm shaft including a first guide pin protruding from an outer surface, a first arm portion coupled to the first arm shaft so as to rotate about the first arm axis and slidably connected to the first rotating structure, a second rotating structure coupled to a second guide rail of the fixed structure so as to be rotatable about a second rotating axis, and a second arm portion extending in a direction parallel to the second rotating axis. a second arm shaft rotatably connected to the fixed structure, wherein the second arm shaft includes a second guide pin protruding from an outer surface thereof, a second arm portion coupled to the second arm shaft so as to rotate around the second arm shaft and slidably connected to the second rotating structure; and a link structure including: a first portion through which the first arm shaft passes and in which a first guide groove in which the first guide pin is at least partially accommodated is formed; a second portion through which the second arm shaft passes and in which a second guide groove in which the second guide pin is at least partially accommodated is formed; and a central portion connecting the first portion and the second portion. [Effects of the Invention]

[0009] According to an embodiment of the hinge structure for an electronic device of the present invention, it is possible to reduce non-interlocking of the first and second housings by providing improved backlash compared to a gear interlocking structure. According to one embodiment of the hinge structure for an electronic device of the present invention, the hinge structure includes a link structure that moves axially during folding and unfolding operations to link the first and second housings, and the center bar is configured to move in conjunction with the movement of the link structure, thereby maintaining the center bar horizontal even when the first and second housings tilt. In addition, various other effects that are directly or indirectly understood by this document can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is an exploded perspective view of an electronic device according to an embodiment of the present invention; [Figure 2a] 1 is a perspective view illustrating an electronic device in an expanded state according to an embodiment of the present invention; [Figure 2b] 1 is a perspective view illustrating an electronic device in a folded state according to an embodiment of the present invention; [Figure 2c] 1A and 1B are diagrams illustrating a fully folded state of an electronic device according to an embodiment of the present invention. [Figure 3] 1A and 1B are diagrams illustrating a first housing, a second housing, and a hinge structure of an electronic device according to an embodiment of the present invention. [Figure 4] 1 is a perspective view showing a hinge structure according to an embodiment of the present invention; [Figure 5] FIG. 2 is a rear view of a hinge structure according to an embodiment of the present invention. [Figure 6] FIG. 2 is an exploded perspective view of a hinge structure according to an embodiment of the present invention. [Figure 7] FIG. 2 is an exploded perspective view of a hinge structure according to an embodiment of the present invention. [Figure 8] 10A and 10B are diagrams illustrating a rotational operation of a rotational structure of a hinge structure according to an embodiment of the present invention. [Figure 9] 10A to 10C are diagrams illustrating the rotational and sliding movements of an arm portion and a rotational structure of a hinge structure according to an embodiment of the present invention. [Figure 10] 10A and 10B are diagrams illustrating a link structure and a center bar of a hinge structure in an expanded state according to an embodiment of the present invention. [Figure 11] 10 is a diagram showing a link structure and a center bar of a hinge structure in a fully folded state according to an embodiment of the present invention. FIG. [Figure 12] 10A and 10B illustrate a link structure of a hinge structure in an unfolded state according to one embodiment of the present invention. [Figure 13] FIG. 10 illustrates a link structure of a hinge structure in a fully folded state according to one embodiment of the present invention. [Figure 14]10A and 10B illustrate a link structure of a hinge structure in an unfolded state according to one embodiment of the present invention. [Figure 15] FIG. 10 illustrates a link structure of a hinge structure in a fully folded state according to one embodiment of the present invention. [Figure 16] 10A and 10B are diagrams illustrating how the center bar is kept horizontal when tilt occurs in the hinge structure according to an embodiment of the present invention. [Figure 17a] 1A-1C illustrate examples of cam structures according to various embodiments of the present invention. [Figure 17b] 10A-10C illustrate engagement of cam structures according to various embodiments of the present invention.

[0011] In connection with the description of the drawings, the same or similar reference numerals are used to refer to the same or similar components. DETAILED DESCRIPTION OF THE INVENTION

[0012] Various embodiments of the present invention will now be described with reference to the accompanying drawings. However, it should be understood that this does not limit the invention to the particular embodiments, but includes various modifications, equivalents, and / or alternatives to the embodiments of the invention.

[0013] FIG. 1 is an exploded perspective view of an electronic device according to an embodiment of the present invention. Referring to FIG. 1, an electronic device 100 includes a first housing 110, a second housing 120, a hinge housing 130, a hinge structure 200, and a display 140.

[0014] In one embodiment, the first housing 110 is connected to the second housing 120 using a hinge structure 200 . The first housing 110 includes a first plate 111 on which the display 140 is placed and a first frame 112 that surrounds at least a portion of the first plate 111 . For example, the first frame 112 forms a part of the surface (eg, side surface) of the electronic device 100 . For example, a part of each of the first region 141 and the folding region 143 of the display 140 is disposed on the first plate 111. The first plate 111 is connected to a first rotating structure 210 of the hinge structure 200 . In one embodiment, at least a portion of the first housing 110 is adhered to the first region 141 of the display 140 . Alternatively, a part of the edge of the front surface of the first housing 110 is adhered to the edge of the first region 141 of the display 140 . In this regard, an adhesive layer is disposed between the first plate 111 of the first housing 110 and the first region 141 of the display 140 .

[0015] In one embodiment, the first housing 110 is provided with at least a portion of its interior being hollow. Inside the first housing 110, a first circuit board 151, a first battery 153, and a camera module 156 are arranged. The first circuit board 151 and the first battery 153 are electrically connected to the second circuit board 152 and the second battery 154 disposed inside the second housing 120 via a flexible substrate. For example, the first circuit board 151 has a processor and a memory arranged thereon. For example, the first battery 153 and the first circuit board 151 are disposed on the first plate 111 . In one embodiment, the first housing 110 may be at least partially made of a metal material, or at least partially made of a non-metal material. The first housing 110 is made of a material having a predetermined rigidity so as to be able to support at least a portion of the display 140 . In one embodiment, the portion of the first housing 110 facing the second housing 120 includes a recessed portion, at least a portion of which has a predetermined curvature, so that the hinge housing 130 can be positioned.

[0016] In various embodiments, the first housing 110 includes a first rear cover 119 that faces the first plate 111 and forms a surface of the electronic device 100 . For example, the first rear cover 119 forms the rear of the electronic device 100 in the unfolded state (eg, FIG. 2a), and the display 140 forms the front of the electronic device.

[0017] In one embodiment, the second housing 120 is coupled to the first housing 110 via a hinge structure 200 . The second housing 120 includes a second plate 121 on which the display 140 is placed and a second frame 122 that surrounds at least a portion of the second plate 121 . For example, the second frame 122 forms a part of the surface (eg, side surface) of the electronic device 100 . For example, a part of each of the second region 142 and the folding region 143 is disposed on the second plate 121. The second plate 121 is connected to the second rotating structure 220 of the hinge structure 200 . In one embodiment, at least a portion of the second housing 120 is adhered to the second region 142 of the display 140 . Alternatively, a part of the edge of the front surface of the second housing 120 is adhered to the edge of the second region 142 of the display 140 . In this regard, an adhesive layer is disposed between the second plate 121 of the second housing 120 and the second region 142 of the display 140 .

[0018] In one embodiment, the second housing 120 is provided with at least a portion of its interior being hollow. Inside the second housing 120, a second circuit board 152 and a second battery 154 are disposed. The second circuit board 152 and the second battery 154 are electrically connected to the first circuit board 151 and / or the first battery 153 disposed inside the first housing 110 via a flexible substrate. For example, the second battery 154 and the second circuit board 152 are disposed on the second plate 121 . In one embodiment, the second housing 120 may be at least partially made of a metal material, or at least partially made of a non-metal material. The second housing 120 is made of a material having a predetermined rigidity so as to be able to support at least a portion of the display 140 . In one embodiment, the portion of second housing 120 facing first housing 110 includes a recessed portion, at least a portion of which has a predetermined curvature, so that hinge housing 130 can be positioned.

[0019] In various embodiments, the second housing 120 includes a second rear cover 129 that faces the second plate 121 and forms the surface of the electronic device 100 . For example, the second rear cover 129 forms the rear of the electronic device 100 in the unfolded state (eg, FIG. 2a), and the display 140 forms the front of the electronic device.

[0020] Various embodiments further include a lattice structure (not shown) and / or brackets (not shown) disposed between the display 140 and the adhesive layer. The lattice structure includes a slit region including a plurality of slits that at least partially overlaps the folding region 143 . Each of the multiple slits extends long in the extension direction of the folding region 143 (for example, the y-axis). The slits support the folding region 143 in a flat state in the unfolded state (eg, FIG. 2a) and assist the folding region 143 in deforming during the folding or unfolding operation. In various embodiments, display 140 is overlaid with only a portion of the lattice structure or brackets.

[0021] In one embodiment, the hinge housing 130 is disposed in a recessed portion of each of the first housing 110 and the second housing 120 . The hinge housing 130 is provided in a shape that is elongated in the y-axis direction as a whole. A boss for fixing the hinge structure 200 is arranged in a partial area of ​​the inner surface of the hinge housing 130 .

[0022] In one embodiment, at least a portion of the display 140 has flexibility. For example, the display 140 includes a first area 141 disposed on the first housing 110, a second area 142 disposed on the second housing 120, and a folding area 143 located between the first area 141 and the second area 142. In one embodiment, the first region 141 and the second region 142 are formed as flat surfaces, and the folding region 143 is formed so as to be deformable into a flat surface or a curved surface.

[0023] According to various embodiments, the hinge structure 200 includes a first rotating structure 210 coupled to the first housing 110 and a second rotating structure 220 coupled to the second housing 120 . The hinge structure 200 is configured so that the first rotating structure 210 and the second rotating structure 220 can rotate around their respective rotation axes (for example, imaginary axes parallel to the y-axis direction). For example, when the first housing 110 and the second housing 120 are folded or unfolded, the first rotating structure 210 and the second rotating structure 220 rotate about their respective rotation axes.

[0024] In various embodiments, the hinge structure 200 includes a center bar 280 that at least partially overlaps the folding region 143 of the display 140 when viewed in the z-axis direction. The center bar 280 supports the back of the folding region 143 so that the folding region 143 remains flat in the unfolded state, and moves in the -z axis direction so as not to come into contact with the folding region 143 during the folding operation.

[0025] FIG. 2a is a perspective view showing an unfolded state of an electronic device according to one embodiment of the present invention, FIG. 2b is a perspective view showing a folded state of an electronic device according to one embodiment of the present invention, and FIG. 2c is a view showing a fully folded state of an electronic device according to one embodiment of the present invention. In one embodiment, the first housing 110 and the second housing 120 rotate in opposite directions about their respective rotation axes. For example, in a folding operation performed from the unfolded state, the first housing 110 rotates clockwise and the second housing 120 rotates counterclockwise.

[0026] In one embodiment, the first housing 110 and the second housing 120 each define an axial direction parallel to the axis of rotation. The axial direction is defined as the extension direction of the folding area 143 of the display 140 . For example, the axial direction is defined as the direction of the long side of the folding region 143 . For example, axial direction means the direction parallel to the y-axis in FIG.

[0027] To describe the state of the electronic device according to an embodiment of the present invention, a first edge P1 of the electronic device 100 and a second edge P2 of the electronic device 100 are defined that are parallel to the axial direction. To describe the state of the electronic device 100, a third edge P3 of the electronic device 100 and a fourth edge P4 of the electronic device 100 perpendicular to the axial direction are defined. For example, the first edge P1 and the third edge P3 include a part of the first frame 112 of the first housing 110. For example, the second edge P2 and the fourth edge P4 include a part of the second frame 122 of the second housing 120.

[0028] The deployed state of the electronic device will now be described with reference to FIG. 2a. For example, the unfolded state includes a state in which the folding area 143 of the display 140 is flat. For example, the unfolded state includes a state in which the first area 141 and the second area 142 of the display 140 are flat surfaces facing in the same direction. For example, the unfolded state includes a state in which the first normal vector n1 of the first region 141 of the display 140 and the second normal vector n2 of the second region 142 of the display 140 are parallel. For example, the unfolded state includes a state in which the third edge P3 and the fourth edge P4 substantially form a straight line. For example, the unfolded state includes a state in which the third edge P3 and the fourth edge P4 form an angle of 180 degrees.

[0029] Referring to FIG. 2b, the folded state of the electronic device will be described. For example, the folded state includes a state in which the folding area 143 of the display 140 is curved. For example, the folded state includes a state in which the first normal vector n1 of the first region 141 and the second normal vector n2 of the second region 142 form a predetermined angle other than 180 degrees. For example, the folded state includes a state in which the third edge P3 and the fourth edge P4 form a predetermined angle other than 180 degrees.

[0030] Referring to FIG. 2c, the fully folded state of the electronic device will be described. For example, the fully folded state means a state in which the first edge P1 and the second edge P2 are substantially in contact with each other in the folded state. For example, the folding region 143 in the fully folded state is made up of a curved surface having a larger curvature than the folding region 143 in the folded state. 2b and 2c, in the folded and fully folded states, the hinge housing 130 at least partially forms the surface of the electronic device 100. For example, the hinge housing 130 is visually exposed between the first housing 110 and the second housing 120 .

[0031] FIG. 3 is a diagram illustrating a first housing, a second housing, and a hinge structure of an electronic device according to an embodiment of the present invention. In one embodiment, the electronic device 100 includes a hinge structure 200 coupled to the first housing 110 and the second housing 120, respectively. For example, in one embodiment, the hinge structure 200 connects the first housing 110 and the second housing 120 such that the first housing 110 and the second housing 120 rotate about a first rotation axis R1 and a second rotation axis R2, respectively.

[0032] In one embodiment, the hinge structure 200 includes a first hinge structure 200a and a second hinge structure 200b spaced apart from the first hinge structure 200a in an axial direction (eg, y-axis direction). In one embodiment, the first rotating structure 210 of the hinge structure 200 is coupled to the first housing 110 . For example, when the first housing 110 is folded or unfolded, the first rotating structure 210 rotates about the first rotation axis R1.

[0033] In one embodiment, the second rotating structure 220 of the hinge structure 200 is coupled to the second housing 120 . For example, when the second housing 120 is folded or unfolded, the second rotating structure 220 rotates about the second rotation axis R2. In one embodiment, the hinge structure 200 further includes a first arm axis 240S, a first arm portion 240, a second arm axis 250S, a second arm portion 250, a first torque structure 201, a second torque structure 202, link structures (260, 270), and a center bar 280.

[0034] In one embodiment, the first arm portion 240 is coupled to a first arm axis 240S for rotation about the first arm axis 240S. The first arm portion 240 is linked to the rotation of the first rotating structure 210 . For example, in the unfolding or folding operation, the first rotating structure 210 rotates about the first rotation axis R1, and the first arm section 240 rotates together with the first arm shaft 240S about the first arm shaft 240S.

[0035] In one embodiment, the second arm portion 250 is coupled to a second arm axis 250S for rotation about the second arm axis 250S. The second arm portion 250 is linked to the rotation of the second rotating structure 220 . For example, in the unfolding or folding operation, the second rotating structure 220 rotates about the second rotation axis R2, and the second arm section 250 rotates together with the second arm shaft 250S about the second arm shaft 250S. In one embodiment, the link structure 260 couples the rotation of the first housing 110 and the second housing 120 . The link structure 260 links the rotation of the first arm shaft 240S and the second arm shaft 250S so that the first housing 110 and the second housing 120 rotate in opposite directions at the same angle. For example, the link structure 260 is configured to move axially in response to rotation of the first arm shaft 240S and the second arm shaft 250S.

[0036] In one embodiment, the center bar 280 moves in the z / -z axis direction during the folding and unfolding operations. In the unfolded state, center bar 280 supports the back of folding area 143 (eg, folding area 143 in FIG. 2a) of a display (eg, display 140 in FIG. 2a) so that the folding area 143 remains flat. During the folding operation, the center bar 280 moves in the −z-axis direction to form a space in which a portion of the folding region 143 of the display 140 is accommodated. In one embodiment, the center bar 280 moves in response to movement of the link structures (260, 270).

[0037] In one embodiment, the hinge structure 200 includes a first torque structure 201 that provides a friction torque to the first arm axis 240S. The first torque structure 201 includes a cam structure and an elastic member, and the elastic member is compressed by the cam structure to generate a friction torque that acts in the opposite direction to the rotation direction of the first arm shaft 240S. The first torque structure 201 can provide an appropriate friction torque to the first arm shaft 240S to prevent the electronic device 100 from being folded or unfolded unintentionally by the user.

[0038] In one embodiment, the hinge structure 200 includes a second torque structure 202 that provides an appropriate friction torque to the second arm axis 250S. The second torque structure 202 includes a cam structure and an elastic member, and the elastic member is compressed by the cam structure to generate a friction torque that acts in the opposite direction to the rotational direction of the second arm shaft 250S. The second torque structure 202 can provide an appropriate friction torque to the second arm shaft 250S to prevent the electronic device 100 from being folded or unfolded unintentionally by the user.

[0039] FIG. 4 is a perspective view showing a hinge structure according to one embodiment of the present invention, FIG. 5 is a rear view of the hinge structure according to one embodiment of the present invention, FIG. 6 is an exploded perspective view of the hinge structure according to one embodiment of the present invention, and FIG. 7 is an exploded perspective view of the hinge structure according to one embodiment of the present invention. With reference to Figures 4 to 7, an axial direction is defined. The axial direction is parallel to the extension direction of the first rotation axis R1 and the second rotation axis R2. The first axial direction (1) is the direction toward the fixed structure 230, and the second axial direction (2) is the direction toward the second fixed member 238.

[0040] In one embodiment, the hinge structure 200 includes a fixed structure 230, a first rotating structure 210, a second rotating structure 220, a first fixed member 236, a second fixed member 238, a first arm axis 240S, a second arm axis 250S, link structures (260, 270), a first arm portion 240, a second arm portion 250, a first torque structure 201, and a second torque structure 202. In one embodiment, the fixed structure 230 is fixedly disposed at least partially within the hinge housing (eg, hinge housing 130 of FIG. 1). The first rotating structure 210 and the second rotating structure 220 are rotatably coupled to the fixed structure 230 .

[0041] In one embodiment, the fixed structure 230 includes a first opening area 2391 to which the first guide portion 211 of the first rotating structure 210 is coupled. In one embodiment, the fixed structure 230 includes a first guide rail 233 for guiding the rotation path of the first rotating structure 210 . For example, the first guide rail 233 is formed on the side wall of the first opening region 2391. For example, the first guide rail 233 is formed on at least one of both side walls of the first opening region 2391 in the axial direction. In one embodiment, the first guide rail 233 receives the first protrusion 213 of the first rotating structure 210 .

[0042] In one embodiment, the fixed structure 230 includes a second open area 2392 to which the second guide portion 221 of the second rotating structure 220 is coupled. In one embodiment, the fixed structure 230 includes a second guide rail 234 for guiding the rotation path of the second rotating structure 220 . For example, the second guide rail 234 is formed on the side wall of the second opening area 2392. For example, the second guide rail 234 is formed on at least one of both side walls of the second opening region 2392 in the axial direction. In one embodiment, the second guide rail 234 receives the second protrusion 223 of the second rotating structure 220 . In one embodiment, the first fixed member 236 and the second fixed member 238 are fixedly disposed on the hinge housing 130 . A center bar 280 is coupled to the first fixing member 236 and the second fixing member 238 .

[0043] For example, the first fixing member 236 has a first fixing hole 2362 and a first hole 2361 formed therein. The first fixing member 236 is fixedly coupled to a hinge housing (eg, the hinge housing 130 in FIG. 1) via a first fixing hole 2362 and a fastening member inserted into the first fixing hole 2362 . For example, the fastening member includes a screw. For example, a screw may extend through the first fastening hole 2362 into the hinge housing 130 . For example, the first fixing member 236 is coupled to the center bar 280 through the first hole 2361 . The first protruding portion 283 of the center bar 280 is at least partially inserted into the first hole 2361 . 5 and 7, the first protrusion 283 of the center bar 280 and the first screw 283a fastened to the first protrusion 283 are inserted into the first hole 2361 of the first fixing member 236.

[0044] For example, the second fixing member 238 has a second fixing hole 2382 and a second hole 2381 formed therein. The second fixing member 238 is fixedly coupled to the hinge housing 130 via the second fixing holes 2382 and the fastening members inserted into the second fixing holes 2382 . For example, the fastening member includes a screw. For example, a screw may extend through the second fastening hole 2382 into the hinge housing 130 . For example, the second fixing member 238 is coupled to the center bar 280 through the second hole 2381 . The second protruding portion 284 of the center bar 280 is at least partially inserted into the second hole 2381. 5 and 7, the second protrusion 284 of the center bar 280 and the second screw 284a fastened to the second protrusion 284 are inserted into the second hole 2381 of the second fixing member 238.

[0045] In one embodiment, the first fixed member 236 is penetrated by the first arm shaft 240S and the second arm shaft 250S and is configured to support the rotation of the first arm shaft 240S and the second arm shaft 250S. In one embodiment, the second fixed member 238 is penetrated by the first arm shaft 240S and the second arm shaft 250S and is configured to support the rotation of the first arm shaft 240S and the second arm shaft 250S.

[0046] In one embodiment, the first rotating structure 210 is configured to rotate in a predetermined path relative to a fixed structure 230 fixedly disposed in a hinge housing (e.g., hinge housing 130 in FIG. 1) when the first housing (e.g., first housing 110 in FIG. 1) is folded or unfolded. In one embodiment, the first rotating structure 210 includes a first guide portion 211 rotatably coupled to the fixed structure 230 and a first connecting portion 212 connected to the first housing 110 . The first connecting portion 212 is folded or unfolded together with the first housing 110 when the electronic device 100 is folded or unfolded. In one embodiment, the first rotating structure 210 includes a first protrusion 213 formed on the first guide portion 211 . The first protrusion 213 guides the rotation path of the first rotating structure 210 together with the first guide rail 233 .

[0047] In one embodiment, the first arm portion 240 includes a first connecting portion 241 , a second connecting portion 242 , and a first extension portion 243 . In one embodiment, the first arm portion 240 is slidably coupled to the first rotating structure 210 via a first sliding pin 246 . The first arm portion 240 is coupled to the first arm shaft 240S via a first coupling portion 241 and a second coupling portion 242 so as to rotate together with the first arm shaft 240S. For example, the first connecting portion 241 and the second connecting portion 242 are press-fitted onto the first arm shaft 240S.

[0048] In one embodiment, in connection with the sliding movement of the first arm portion 240 , the first sliding pin 246 of the first extension portion 243 is fastened to the first rotating structure 210 . For example, the first sliding pin 246 is at least partially received in the first sliding groove 215 of the first rotating structure 210 . For example, the first sliding pin 246 moves along the first sliding groove 215 when the first rotating structure 210 rotates. In one embodiment, when the first rotating structure 210 rotates around the first rotation axis R1, the first arm portion 240 rotates around the first arm axis 240S, and at the same time, the first arm portion 240 slides relative to the first rotating structure 210. For example, the first arm portion 240 slides with the first sliding pin 246 fastened to the first rotating structure 210 .

[0049] In one embodiment, the first arm shaft 240S is rotatably coupled to the fixed structure 230. For example, the first arm shaft 240S extends a long distance from the fixed structure 230 in the second axis direction (2). The first arm shaft 240S extends so as to pass through the first fixed member 236 and the second fixed member 238. For example, the rotation of the first arm shaft 240S is supported by the first fixed member 236 and the second fixed member 238. For example, the end of the first arm shaft 240S in the first axis direction (1) is rotatably inserted into a recess or opening formed in the fixed structure 230.

[0050] 4 and 5, a first fixing ring 2491 is coupled to the end of the first arm shaft 240S in the second axis direction (2). The first fixing ring 2491 is configured to restrict axial movement of the first arm shaft 240S. The first fixing ring 2491 is at least partially inserted into a groove formed in the outer circumferential surface of the first arm shaft 240S. For example, the first fixing ring 2491 includes a C-clip that surrounds at least a portion of the first arm shaft 240S. In one embodiment, the first arm shaft 240S passes through the first connecting portion 241 and the second connecting portion 242 of the first arm portion 240. For example, the first arm shaft 240S is coupled to the first coupling portion 241 and the second coupling portion 242 so as to rotate together with the first coupling portion 241 and the second coupling portion 242. For example, the first connecting portion 241 and the second connecting portion 242 are press-fitted onto the first arm shaft 240S. In this way, when the first rotating structure 210 rotates, the first arm portion 240 rotates due to the first sliding pin 246 . When the first arm portion 240 rotates, the first connecting portion 241 and the second connecting portion 242 rotate the first arm shaft 240S.

[0051] In one embodiment, the second rotating structure 220 is configured to rotate in a predetermined path relative to a fixed structure 230 fixedly disposed in a hinge housing (e.g., hinge housing 130 in FIG. 1) when the first housing (e.g., first housing 110 in FIG. 1) is folded or unfolded. In one embodiment, the second rotating structure 220 includes a second guide portion 221 rotatably coupled to the fixed structure 230 and a second connecting portion 222 connected to the second housing 120 . The second connecting portion 222 is folded or unfolded together with the second housing 120 when the electronic device 100 is folded or unfolded. In one embodiment, the second rotating structure 220 includes a second protrusion 223 formed on the second guide portion 221 . The second protrusion 223 guides the rotation path of the second rotating structure 220 together with the second guide rail 234 .

[0052] In one embodiment, the second arm portion 250 includes a third connecting portion 251 , a fourth connecting portion 252 , and a second extension portion 253 . In one embodiment, the second arm portion 250 is slidably coupled to the second rotating structure 220 via a second sliding pin 256 . The second arm portion 250 is coupled to the second arm shaft 250S via a third coupling portion 251 and a fourth coupling portion 252 so as to rotate together with the second arm shaft 250S. For example, the third connecting portion 251 and the fourth connecting portion 252 are press-fitted onto the second arm shaft 250S.

[0053] In one embodiment, in connection with the sliding movement of the second arm portion 250 , the second sliding pin 256 of the second extension portion 253 is fastened to the second rotating structure 220 . For example, the second sliding pin 256 is at least partially housed in the second sliding groove 225 of the second rotating structure 220 . For example, the second sliding pin 256 moves along the second sliding groove 225 when the second rotating structure 220 rotates. In one embodiment, when the second rotating structure 220 rotates around the second rotation axis R2, the second arm portion 250 rotates around the second arm axis 250S, and at the same time, the second arm portion 250 slides relative to the second rotating structure 220. For example, the second arm portion 250 slides with the second sliding pin 256 fastened to the second rotating structure 220 .

[0054] In one embodiment, the second arm shaft 250S is rotatably coupled to the fixed structure 230. For example, the second arm shaft 250S extends a long distance from the fixed structure 230 in the second axial direction (2). The second arm shaft extends through the first fixed member 236 and the second fixed member 238 . For example, the rotation of the second arm shaft 250S is supported by the first fixed member 236 and the second fixed member 238. For example, the end of the second arm shaft 250S in the first axis direction (1) is rotatably inserted into a recess or opening formed in the fixed structure 230.

[0055] 4 and 5, a second fixing ring 2591 is coupled to the end of the second arm shaft 250S in the second axis direction (2). The second fixing ring 2591 is configured to restrict axial movement of the second arm shaft 250S. The second fixing ring 2591 is at least partially inserted into a groove formed in the outer circumferential surface of the second arm shaft 250S. For example, the second fixing ring 2591 includes a C-clip that surrounds at least a portion of the second arm shaft 250S. In one embodiment, the second arm shaft 250S passes through the third connecting portion 251 and the fourth connecting portion 252 of the second arm portion 250. For example, the second arm shaft 250S is coupled to the third coupling portion 251 and the fourth coupling portion 252 so as to rotate together with the third coupling portion 251 and the fourth coupling portion 252. For example, the third connecting portion 251 and the fourth connecting portion 252 are press-fitted onto the second arm shaft 250S. In this way, when the second rotating structure 220 rotates, the second arm portion 250 rotates due to the second sliding pin 256. When the second arm portion 250 rotates, the third connecting portion 251 and the fourth connecting portion 252 rotate the second arm shaft 250S.

[0056] In one embodiment, the first rotating structure 210 and the second rotating structure 220 are linked to each other via a first arm shaft 240S, a second arm shaft 250S, and link structures (260, 270) so as to rotate in opposite directions at the same angle. In one embodiment, the hinge structure 200 includes a first torque structure 201 that provides torque to the first arm axis 240S and a second torque structure 202 that provides torque to the second arm axis 250S.

[0057] In one embodiment, the first torque structure 201 and the second torque structure 202 provide a friction torque corresponding to the restoring torque of the display 140 . For example, in a folded state (eg, FIGS. 2b and 2c) in which a portion of the display 140 is curved, a restoring force acts on the display 140 to return it to a flat state. The restoring force acts as a restoring torque in the deployment direction on each of the first arm shaft 240S and the second arm shaft 250S. For example, referring to FIG. 7, the restoring torque acts on the first arm shaft 240S in the counterclockwise direction, which is the deployment direction, and acts on the second arm shaft 250S in the clockwise direction, which is the deployment direction.

[0058] According to one embodiment, the hinge structure 200 is configured to provide a predetermined friction torque that offsets the restoring torque so that the display 140 remains in a predetermined folded state. For example, the friction torque is proportional to the surface friction force between the cam structures, and the surface friction force is increased by the compressed elastic members (295a, 295b, 295c, 295d). For example, the first torque structure 201 includes a first cam structure (244, 245, 291, 293) configured to compress or tension the third resilient member 295a and the fourth resilient member 295b. When the third elastic member 295a and the fourth elastic member 295b are compressed, the surface friction force between the first cam structures (244, 245, 291, 293) increases, and the friction torque increases. For example, the second torque structure 202 includes second cam structures (254, 255, 292, 294) configured to compress or tension the fifth resilient member 295c and the sixth resilient member 295d. When the fifth elastic member 295c and the sixth elastic member 295d are compressed, the surface friction force between the second cam structures (254, 255, 292, 294) increases, and the friction torque increases.

[0059] In one embodiment, the hinge structure 200 includes a first cam member 290a and a second cam member 290b. The first cam member 290a is penetrated by the first arm shaft 240S and the second arm shaft 250S. The first cam member 290a is configured for linear movement along the first arm axis 240S and the second arm axis 250S. The first cam member 290 a includes a first cam 291 that meshes with the first arm cam 244 of the first arm portion 240 , and a second cam 292 that meshes with the third arm cam 254 of the second arm portion 250 . The second cam member 290b is penetrated by the first arm shaft 240S and the second arm shaft 250S. The second cam member 290b is configured for linear movement along the first arm axis 240S and the second arm axis 250S. The second cam member 290 b includes a third cam 293 that meshes with the second arm cam 245 of the first arm portion 240 , and a fourth cam 294 that meshes with the fourth arm cam 255 of the second arm portion 250 .

[0060] In one embodiment, the first torque structure 201 includes a first arm cam 244 formed on the first arm portion 240, a first cam 291 of the first cam member 290a, a third elastic member 295a, a fourth elastic member 295b, a third cam 293 of the second cam member 290b, and a second arm cam 245 of the first arm portion 240. Here, the first arm cam 244 and the second arm cam 245 rotate together with the first arm shaft 240S, and the first cam member 290a and the second cam member 290b are configured to move linearly in the axial direction. For example, first arm cam 244 and second arm cam 245 are referred to as rotary cams, and first cam 291 and third cam 293 are referred to as linear cams. The third elastic member 295a and the fourth elastic member 295b are compressed or stretched by the movement of the first cam member 290a and the second cam member 290b.

[0061] In one embodiment, the third elastic member 295a is disposed on the first arm shaft 240S. The third elastic member 295a is disposed between the first cam 291 of the first cam member 290a and the first fixed member 236. The third elastic member 295a is configured to be compressed when the first cam member 290a moves in the second axial direction (2), and to be stretched when the first cam member 290a moves in the first axial direction (1). In one embodiment, the fourth elastic member 295b is disposed on the first arm shaft. The fourth elastic member 295b is disposed between the third cam 293 of the second cam member 290b and the first fixed member 236. The fourth elastic member 295b is configured to be compressed when the second cam member 290b moves in the first axial direction (1), and to be stretched when the second cam member 290b moves in the second axial direction (2).

[0062] In one embodiment, the second torque structure 202 includes a third arm cam 254 formed on the second arm portion 250, a second cam 292 of the first cam member 290a, a fifth elastic member 295c, a sixth elastic member 295d, a fourth cam 294 of the second cam member 290b, and a fourth arm cam 255 of the second arm portion 250. Here, the third arm cam 254 and the fourth arm cam 255 rotate together with the second arm shaft 250S, and the first cam member 290a and the second cam member 290b are configured to move linearly in the axial direction. For example, the third arm cam 254 and the fourth arm cam 255 are referred to as rotary cams, and the second cam 292 and the fourth cam 294 are referred to as linear cams. The fifth elastic member 295c and the sixth elastic member 295d are compressed or stretched by the movement of the first cam member 290a and the second cam member 290b.

[0063] In one embodiment, the fifth elastic member 295c is disposed on the second arm shaft 250S. The fifth elastic member 295c is disposed between the second cam 292 of the first cam member 290a and the first fixed member 236. The fifth elastic member 295c is configured to be compressed when the first cam member 290a moves in the second axial direction (2), and to be stretched when the first cam member 290a moves in the first axial direction (1). In one embodiment, the sixth elastic member 295d is disposed on the second arm shaft 250S. The sixth elastic member 295d is disposed between the fourth cam 294 of the second cam member 290b and the first fixed member 236. The sixth elastic member 295d is configured to be compressed when the second cam member 290b moves in the first axial direction (1), and to be stretched when the second cam member 290b moves in the second axial direction (2).

[0064] In one embodiment, the link structures (260, 270) are coupled to the first arm shaft 240S and the second arm shaft 250S, respectively, and are configured for axial linear movement in response to rotation of the first arm shaft 240S and the second arm shaft 250S, respectively. In one embodiment, the link structures (260, 270) link the first arm shaft 240S and the second arm shaft 250S so that the first rotating structure 210 and the second rotating structure 220 rotate in opposite directions at the same angle. In one embodiment, the link structures (260, 270) include a first link structure 260 and a second link structure 270. The first link structure 260 and the second link structure 270 are axially spaced apart. For example, between the first link structure 260 and the second link structure 270, the first arm portion 240, the second arm portion 250, the first cam structures (244, 245, 291, 293), the second cam structures (254, 255, 292, 294), and the first fixing member 236 are arranged.

[0065] In one embodiment, the first link structure 260 includes a first portion 260a through which the first arm shaft 240S passes, a second portion 260b through which the second arm shaft 250S passes, and a first central portion 260c connecting the first portion 260a and the second portion 260b. For example, the first portion 260a and the second portion 260b extend from the first central portion 260c in a direction substantially perpendicular to the axial direction.

[0066] In one embodiment, referring to FIG. 6, a first guide groove 261 is formed in the first portion 260a. The first guide groove 261 receives the first guide pin 248 of the first arm shaft 240S. When the first arm shaft 240S rotates, the first guide pin 248 moves along the first guide groove 261, and accordingly, the first link structure 260 moves to one side in the axial direction. In one embodiment, the first guide groove 261 has a spiral shape that wraps around the first arm shaft 240S. The first guide groove 261 extends in the circumferential direction and the axial direction of the first arm shaft 240S. The axial extension length of the first guide groove 261 corresponds to the axial movement distance of the first link structure 260 . The circumferential extension length of the first guide groove 261 corresponds to the rotation angle of the first link structure 260 .

[0067] In one embodiment, referring to FIG. 6, the second portion 260b has a second guide groove 262 formed therein. The second guide groove 262 receives the third guide pin 258 of the second arm shaft 250S. When the second arm shaft 250S rotates, the third guide pin 258 moves along the second guide groove 262, and accordingly, the second link structure 270 moves to one side in the axial direction. In one embodiment, the second guide groove 262 has a spiral shape that wraps around the second arm shaft 250S. The second guide groove 262 extends in the circumferential direction and the axial direction of the second arm shaft 250S. The axial extension length of the second guide groove 262 corresponds to the axial movement distance of the second link structure 270 . The circumferential extension length of the second guide groove 262 corresponds to the rotation angle of the second link structure 270 .

[0068] In one embodiment, the first guide groove 261 and the second guide groove 262 have shapes that are symmetrical with respect to the central axis. The central axis is defined as an axis that is separated from each of the first arm axis 240S and the second arm axis 250S by the same distance and is parallel to the axial direction. In one embodiment, the first guide groove 261 and the second guide groove 262 extend in the same axial direction by the same length and extend in opposite circumferential directions at the same angle. For example, in the folding and unfolding operations, the first rotating structure 210 and the second rotating structure 220 rotate in opposite directions. Accordingly, the first arm shaft 240S and the second arm shaft 250S rotate in opposite directions. Therefore, the first guide groove 261 and the second guide groove 262 are formed symmetrically with respect to the central axis so that when the first arm shaft 240S and the second arm shaft 250S rotate in opposite directions, the first link structure 260 moves in the same direction.

[0069] For example, referring to FIGS. 10 and 11, the first guide groove 261 extends a first distance d1 in the axial direction and extends a first angle θ1 in the circumferential direction of the first arm shaft 240S. The second guide groove 262 extends a first distance d1 in the axial direction and extends a first angle θ1 in the circumferential direction of the second arm shaft 250S. In one embodiment, the first arm axis 240S and the second arm axis 250S rotate by the same angle, so that the first angle θ1 and the second angle θ2 are substantially the same. On the other hand, the first distance d1 and the second distance d2 are different. As a result, the first link structure 260 links the first arm shaft 240S and the second arm shaft 250S so that they rotate in opposite directions but at the same angle.

[0070] In one embodiment, the second link structure 270 includes a third portion 270a through which the first arm shaft 240S passes, a fourth portion 270b through which the second arm shaft 250S passes, and a second central portion 270c connecting the third portion 270a and the fourth portion 270b. For example, the third portion 270a and the fourth portion 270b extend from the second central portion 270c in a direction substantially perpendicular to the axial direction.

[0071] In one embodiment, referring to FIG. 6, the third portion 270a has a third guide groove 271 formed therein. The third guide groove 271 receives the second guide pin 249 of the first arm shaft 240S. When the first arm shaft 240S rotates, the second guide pin 249 moves along the third guide groove 271, and accordingly, the second link structure 270 moves to one side in the axial direction. In one embodiment, the third guide groove 271 has a spiral shape that wraps around the first arm shaft 240S. The third guide groove 271 extends in the circumferential direction and the axial direction of the first arm shaft 240S. The axial extension length of the first guide groove 261 corresponds to the axial movement distance of the second link structure 270 . The circumferential extension length of the third guide groove 271 corresponds to the rotation angle of the second link structure 270 .

[0072] In one embodiment, referring to FIG. 6, the fourth portion 270b has a fourth guide groove 272 formed therein. The fourth guide groove 272 receives the fourth guide pin 259 of the second arm shaft 250S. When the second arm shaft 250S rotates, the fourth guide pin 259 moves along the fourth guide groove 272, and accordingly, the second link structure 270 moves to one side in the axial direction. In one embodiment, the fourth guide groove 272 has a spiral shape that wraps around the second arm shaft 250S. The second guide groove 262 extends in the circumferential direction and the axial direction of the second arm shaft 250S. The axial extension length of the second guide groove 262 corresponds to the axial movement distance of the second link structure 270 . The circumferential extension length of the fourth guide groove 272 corresponds to the rotation angle of the second link structure 270 .

[0073] In one embodiment, the third guide groove 271 and the fourth guide groove 272 have a shape that is symmetrical with respect to the central axis. The central axis is defined as an axis that is separated from each of the first arm axis 240S and the second arm axis 250S by the same distance and is parallel to the axial direction. In one embodiment, the third guide groove 271 and the fourth guide groove 272 extend in the same axial direction with the same length and extend in opposite circumferential directions at the same angle. For example, in the folding and unfolding operations, the first rotating structure 210 and the second rotating structure 220 rotate in opposite directions. Accordingly, the first arm shaft 240S and the second arm shaft 250S rotate in opposite directions. Therefore, the third guide groove 271 and the fourth guide groove 272 are formed symmetrically with respect to the central axis so that when the first arm shaft 240S and the second arm shaft 250S rotate in opposite directions, the second link structure 270 moves in the same direction.

[0074] For example, referring to FIGS. 10 and 11, the third guide groove 271 extends a second distance d2 in the axial direction and extends a second angle θ2 in the circumferential direction of the first arm shaft 240S. The fourth guide groove 272 extends a second distance d2 in the axial direction and extends a second angle θ2 in the circumferential direction of the second arm shaft 250S. In one embodiment, the first arm axis 240S and the second arm axis 250S rotate by the same angle, so that the first angle θ1 and the second angle θ2 are substantially the same. On the other hand, the first distance d1 and the second distance d2 are different. As a result, the second link structure 270 links the first arm shaft 240S and the second arm shaft 250S so that they rotate in opposite directions but at the same angle.

[0075] In one embodiment, center bar 280 is configured to support the back of display 140 such that a folding area (e.g., folding area 143 in FIG. 2a) of the display (e.g., display 140 in FIG. 2a) remains flat in the unfolded state. In various embodiments, the center bar 280 is configured to support the folding region 143 of the display 140, which is at least partially curved in the folded state. For this reason, the center bar 280 is configured to move in the z / -z axis direction during folding and unfolding operations. In one embodiment, the center bar 280 couples the movement of the first link structure 260 and the second link structure 270, respectively.

[0076] In one embodiment, the center bar 280 couples to the first fixed member 236 , the second fixed member 238 , the first link structure 260 , and the second link structure 270 . Referring to FIG. 4, when the hinge structure 200 is viewed from above, the center bar 280 at least partially overlaps the first central portion 260c of the first link structure 260, the second central portion 270c of the second link structure 270, the first fixing member 236, and the second fixing member 238. In one embodiment, the center bar 280 is elongated in the axial direction.

[0077] Referring to FIG. 7, the center bar 280 includes a first protruding portion 283, a second protruding portion 284, a first inclined protruding portion 281, and a second inclined protruding portion 282 formed on the rear surface of the center bar 280. In one embodiment, the first protruding portion 283 has a first elastic member 288 disposed thereon. For example, the first elastic member 288 surrounds at least a portion of the first protruding portion 283 .

[0078] In one embodiment, referring to FIG. 5, the first protruding portion 283 has a first screw 283a fastened thereto. Referring to FIG. 7, the first protruding portion 283 is at least partially inserted into the first hole 2361 of the first fixing member 236 . Here, at least a portion of the first screw 283 a is located inside the first hole 2361 . The head of the first screw 283 a supports one side of the first elastic member 288 . For example, the head of the first screw 283a is referred to as a flange. In one embodiment, the second protruding portion 284 has a second elastic member 289 disposed thereon. For example, the second elastic member 289 surrounds at least a portion of the second protruding portion 284 .

[0079] In one embodiment, referring to FIG. 5, the second protruding portion 284 has a second screw 284a fastened thereto. Referring to FIG. 7, the second protruding portion 284 is at least partially inserted into the second hole 2381 of the second fixing member 238 . Here, at least a portion of the second screw 284 a is located inside the second hole 2381 . The head of the second screw 284 a supports one side of the second elastic member 289 . For example, the head of the second screw 284a is referred to as a flange.

[0080] In one embodiment, the first protruding portion 283 and the second protruding portion 284 are elongated relative to the z-axis displacement that the center bar 280 can move. As a result, the center bar 280 moves in the z-axis direction with the first protruding portion 283 and the second protruding portion 284 housed in the first hole 2361 and the second hole 2381, respectively. That is, the first protruding portion 283 and the second protruding portion 284 guide the movement of the center bar 280.

[0081] In one embodiment, the first elastic member 288 is at least partially located within the first hole 2361 of the first fixing member 236 . The first elastic member 288 provides elastic force to the center bar 280 . The first elastic member 288 is configured, for example, to be compressed when the center bar 280 moves in the z-axis direction, and to be stretched when the center bar 280 moves in the -z-axis direction. In one embodiment, the second elastic member 289 is at least partially located within the second hole 2381 of the second fixing member 238 . The second elastic member 289 provides elastic force to the center bar 280 . The second elastic member 289 is configured to be compressed when the center bar 280 moves in the z-axis direction, and to be stretched when the center bar 280 moves in the -z-axis direction, for example.

[0082] In one embodiment, referring to FIG. 7, the first angled protrusion 281 includes a third angled surface 281a. The third inclined surface 281 a is in at least partial contact with the first inclined surface 264 formed on the first central portion 260 c of the first link structure 260 . When the first link structure 260 moves in the axial direction, the third inclined surface 281a is pressed in the z-axis direction by the first inclined surface 264.

[0083] In one embodiment, referring to FIG. 7, the second angled protrusion 282 includes a fourth angled surface 282a. The fourth inclined surface 282 a at least partially contacts the second inclined surface 274 formed on the second central portion 270 c of the second link structure 270 . When the second link structure 270 moves in the axial direction, the fourth inclined surface 282a is pressed in the z-axis direction by the second inclined surface 274.

[0084] In one embodiment, the center bar 280 is configured to move in the z-axis direction and z-axis direction due to movement of the first link structure 260 and the second link structure 270, and further moves due to the elastic force of the first elastic member 288 and the second elastic member 289.

[0085] FIG. 8 is a diagram illustrating the rotational operation of the rotational structure of the hinge structure according to one embodiment of the present invention. FIG. 8 is a view of the hinge structure as seen from the direction A shown in FIG. FIG. 8(a) is a diagram showing the hinge structure 200 in an unfolded state, FIG. 8(b) is a diagram showing the hinge structure 200 in a folded state, and FIG. 8(c) is a diagram showing the hinge structure 200 in a fully folded state.

[0086] In one embodiment, the fixed structure 230 is formed with a first guide rail 233 and a second guide rail 234 . In one embodiment, the first guide rail 233 has a substantially arcuate shape. For example, the center of the arc of the first guide rail 233 is the first rotation axis R1. That is, the first guide rail 233 guides the first rotating structure 210 to rotate along a rotation path centered on the first rotation axis R1. In one embodiment, the second guide rail 234 has a substantially arcuate shape. For example, the center of the arc of the second guide rail 234 is the second rotation axis R2. That is, the second guide rail 234 guides the second rotating structure 220 to rotate along a rotation path centered on the second rotation axis R2.

[0087] In one embodiment, the first rotating structure 210 includes a first connecting portion 212 and a first guide portion 211 . The first guide portion 211 is substantially cylindrical in shape. For example, the cross section of the first guide portion 211 is substantially arc-shaped. In one embodiment, the first rotating structure 210 rotates around a first rotation axis R1 with the first protrusion 213 of the first guide portion 211 housed in the first guide rail 233 of the fixed structure 230. For example, when the first connecting portion 212 is folded or unfolded together with the first housing 110, the first rotating structure 210 rotates along an arc-shaped rotation path centered on the first rotation axis R1.

[0088] In one embodiment, the second rotating structure 220 includes a second connecting portion 222 and a second guide portion 221 . The second guide portion 221 is substantially cylindrical in shape. For example, the cross section of the second guide portion 221 is substantially arc-shaped. In one embodiment, the second rotating structure 220 rotates around the second rotation axis R2 with the second protrusion 223 housed in the second guide rail 234. For example, when the second connecting portion 222 is folded or unfolded together with the second housing 120, the second rotating structure 220 rotates along an arc-shaped rotation path centered on the second rotation axis R2. In one embodiment, the first rotation axis R1 and the second rotation axis R2 are parallel to the axial direction of the hinge structure 200, respectively. In one embodiment, the first rotation axis R1 and the second rotation axis R2 are formed at a position spaced apart in the z-axis direction compared to the first connecting portion 212 of the first rotating structure 210 and the second connecting portion 222 of the second rotating structure 220.

[0089] Referring to FIG. 8(a), the first connecting portion 212 limits the direction in which the first rotating structure 210 can rotate in the deployed state to one. For example, the first end of the first guide rail 233 is open, and the other second end is covered by the first connecting portion 212 . As a result, the first rotating structure 210, in the unfolded state, can rotate clockwise around the first rotation axis R1 with reference to the drawing, but cannot rotate counterclockwise.

[0090] Referring to FIG. 8(a), the second connecting portion 222 limits the direction in which the second rotating structure 220 can rotate in the deployed state to one. For example, the third end of the second guide rail 234 is open, and the other fourth end is covered by the second connecting portion 222 . As a result, in the unfolded state, the second rotating structure 220 can rotate counterclockwise around the second rotation axis R2 with respect to the drawing, but cannot rotate clockwise.

[0091] FIG. 9 is a diagram illustrating the rotational and sliding movements of the arm portion and the rotational structure of the hinge structure according to one embodiment of the present invention. FIG. 9 is a view of the hinge structure as seen from the direction B shown in FIG. FIG. 9(a) is a diagram showing the hinge structure 200 in an unfolded state, FIG. 9(b) is a diagram showing the hinge structure 200 in a folded state, and FIG. 9(c) is a diagram showing the hinge structure 200 in a fully folded state.

[0092] Referring to FIG. 9, when the hinge structure 200 is folded or unfolded, the rotating structures (210, 220) and the arm portions (240, 250) rotate around different axes. For example, the rotating structures (210, 220) and the arm portions (240, 250) rotate in different rotation paths. The difference in the rotational paths of the rotating structures (210, 220) and the arms (240, 250) causes the arms (240, 250) to perform a sliding motion when the hinge structure 200 is folded or unfolded.

[0093] In one embodiment, the first rotating structure 210 rotates in a first rotational direction about a first rotational axis R1. For example, in the folding operation, the first rotating structure 210 rotates clockwise. For example, with reference to the deployed state, the point on the first rotating structure 210 where the first sliding pin 246 is located is defined as the first point A1. During the folding and unfolding operations, the first point A1 of the first rotating structure 210 moves along a first rotation path P1.

[0094] Referring to FIG. 9, the first arm portion 240 and the first sliding pin 246 rotate about a first arm axis 240S. For example, in a folding operation, the first arm portion 240 and the first sliding pin 246 rotate clockwise. For example, in the unfolded state, the first sliding pin 246 is located at a first point A1, and in the folded state, the first sliding pin 246 is located at a position spaced apart from the first point A1 in a direction perpendicular to the axial direction. The first sliding pin 246 moves along a second rotational path P2 during the folding and unfolding motion. In various embodiments, the first rotational path P1 and the second rotational path PA2 are different. For example, the first rotation axis R1 and the first arm axis 240S are parallel but do not coincide, and the rotation radii of the first rotating structure 210 and the first arm section 240 do not coincide.

[0095] As a result, the first arm portion 240 and the first sliding pin 246 slide relative to the first rotating structure 210 during the folding and unfolding operations. The sliding movement of the first sliding pin 246 and the first arm portion 240 is guided by the first sliding pin 246 being housed in the first sliding groove 215 of the first rotating structure 210 . In one embodiment, when a folding operation is performed from the unfolded state, the distance between the first sliding pin 246 and the first point A1 increases. When the unfolding operation is performed from the fully folded state, the distance between the first sliding pin 246 and the first point A1 decreases.

[0096] In one embodiment, the second rotating structure 220 rotates in a second rotational direction about a second rotational axis R2. For example, in the folding operation, the second rotating structure 220 rotates counterclockwise. For example, with reference to the deployed state, the point on the second rotating structure 220 where the second sliding pin 256 is located is defined as the second point A2. During the folding and unfolding operations, the second point A2 moves along a third rotation path P3.

[0097] In one embodiment, the second arm portion 250 and the second sliding pin 256 rotate about a second arm axis 250S. For example, in the folding operation, the second arm portion 250 and the second sliding pin 256 rotate counterclockwise. For example, in the unfolded state, the second sliding pin 256 is located at the second point A2, and in the folded state, the second sliding pin 256 is located at a position spaced apart from the second point A2 in a direction perpendicular to the axial direction. The second sliding pin 256 moves along a fourth rotational path P4 during the folding and unfolding motion. In various embodiments, the third rotational path P3 and the fourth rotational path PA4 are different. For example, the second rotation axis R2 and the second arm axis 250S are parallel to each other but do not coincide, and the rotation radii of the second rotating structure 220 and the second arm section 250 do not coincide.

[0098] As a result, the second arm portion 250 and the second sliding pin 256 slide relative to the second rotating structure 220 during the folding and unfolding operations. The sliding movement of the second sliding pin 256 and the second arm portion 250 is guided by the second sliding pin 256 being housed in the second sliding groove 225 of the second rotating structure 220 . In one embodiment, when a folding operation is performed from the unfolded state, the distance between the second sliding pin 256 and the second point A2 increases. When the unfolding operation is performed from the fully folded state, the distance between the second sliding pin 256 and the second point A2 decreases.

[0099] FIG. 10 is a diagram showing the link structure and center bar of the hinge structure in an unfolded state according to one embodiment of the present invention, and FIG. 11 is a diagram showing the link structure and center bar of the hinge structure in a fully folded state according to one embodiment of the present invention.

[0100] In one embodiment, the link structures (260, 270) are configured to move axially when the electronic device 100 and / or the hinge structure 200 undergoes folding and unfolding movements. The first link structure 260 and the second link structure 270 are disposed at axially spaced positions. The first link structure 260 is located at a position spaced apart from the second link structure 270 in the first axial direction (1). The second link structure 270 is located at a position spaced apart from the first link structure 260 in the second axial direction (2).

[0101] In one embodiment, the first connecting portion 241 and the second connecting portion 242 of the first arm portion 240, the third connecting portion 251 and the fourth connecting portion 252 of the second arm portion 250, the first fixing member 236, the first cam member 290a, the second cam member 290b, and elastic members (295a, 295b, 295c, 295d) are arranged between the first link structure 260 and the second link structure 270.

[0102] In one embodiment, the first link structure 260 is configured such that the first portion 260a couples to the first arm axis 240S and the second portion 260b couples to the second arm axis 250S. For example, the first link structure 260 moves axially along the first arm axis 240S and the second arm axis. The first guide pin 248 of the first arm shaft 240S is positioned in the first guide groove 261 formed in the first portion 260a. The third guide pin 258 of the second arm shaft 250S is positioned in the second guide groove 262 formed in the second portion 260b.

[0103] In one embodiment, the first link structure 260 is disposed between the fixed structure 230 and the arm portions (240, 250). For example, the first portion 260a of the first link structure 260 is disposed between the fixed structure 230 and the first connecting portion 241 of the first arm portion 240, and the second portion 260b is disposed between the fixed structure 230 and the third connecting portion 251 of the second arm portion 250.

[0104] In one embodiment, the first link structure 260 is disposed so as to be spaced apart from the fixed structure 230 and / or the arm portions (240, 250) by a predetermined distance in the axial direction. For example, referring to Figure 10, which shows the unfolded state, the first link structure 260 is at least partially in contact with the fixed structure 230 and is spaced a first distance d1 from the first connecting portion 241 of the first arm portion 240 and the third connecting portion 251 of the second arm portion 250. The first distance d1 is substantially the same as or greater than the axial displacement of the first link structure 260. For example, referring to Figure 11, which shows the fully folded state, the first link structure 260 at least partially contacts the first connecting portion 241 of the first arm portion 240 and the third connecting portion 251 of the second arm portion 250, and is spaced apart from the fixed structure 230 by a first distance d1. The first distance d1 is substantially the same as or greater than the axial displacement of the first link structure 260. For example, the fixed structure 230 and the arm portions (240, 250) function as stoppers that limit the maximum travel distance of the first link structure 260.

[0105] In one embodiment, in the unfolded state of FIG. 10, the first guide pin 248 is located at the first end 261a of the first guide groove 261, and the third guide pin 258 is located at the first end 262a of the second guide groove 262. In various embodiments, the deployed state includes a state in which the first portion 260 a and the second portion 260 b of the first link structure 260 are each at least partially in contact with the fixed structure 230 .

[0106] In one embodiment, in the fully folded state of FIG. 11, the first guide pin 248 is located at the second end 261b of the first guide groove 261, and the third guide pin 258 is located at the second end 262b of the second guide groove 262. In various embodiments, the fully folded state includes a state in which the first portion 260a of the first link structure 260 at least partially contacts the first connecting portion 241 of the first arm portion 240, and the second portion 260b of the first link structure 260 at least partially contacts the third connecting portion 251 of the second arm portion 250. In one embodiment, the distance measured in the axial direction between the first end (261a, 262a) and the second end (261b, 262b) of each of the first guide groove 261 and the second guide groove 262 is formed to be substantially the same as the first spacing d1.

[0107] In one embodiment, the second link structure 270 is configured such that the third portion 270a couples to the first arm axis 240S and the fourth portion 270b couples to the second arm axis 250S. For example, second link structure 270 moves axially along first arm axis 240S and second arm axis 250S. The second guide pin 249 of the first arm shaft 240S is positioned in a third guide groove 271 formed in the third portion 270a. A fourth guide pin 259 of the second arm shaft 250S is positioned in a fourth guide groove 272 formed in the fourth portion 270b.

[0108] In one embodiment, the second link structure 270 is disposed between the second fixed member 238 and the arm portions (240, 250). For example, the third portion 270a of the second link structure 270 is disposed between the second fixing member 238 and the second connecting portion 242 of the first arm portion 240, and the fourth portion 270b is disposed between the second fixing member 238 and the fourth connecting portion 252 of the second arm portion 250.

[0109] In one embodiment, the second link structure 270 is disposed so as to be spaced apart from the second fixing member 238 and / or the arm portions (240, 250) by a predetermined distance in the axial direction. For example, referring to Figure 10, which shows the unfolded state, the second link structure 270 is at least partially in contact with the second fixing member 238 and is spaced a second distance d2 from the second connecting portion 242 of the first arm portion 240 and the fourth connecting portion 252 of the second arm portion 250. The second distance d2 is substantially the same as or greater than the axial displacement of the second link structure 270. For example, referring to Figure 11, which shows the fully folded state, the second link structure 270 at least partially contacts the second connecting portion 242 of the first arm portion 240 and the fourth connecting portion 252 of the second arm portion 250, and is spaced apart from the second fixing member 238 by a second distance d2. The second distance d2 is substantially the same as or greater than the axial displacement of the second link structure 270. For example, the second fixing member 238 and the arm portions (240, 250) function as stoppers that limit the maximum travel distance of the second link structure 270.

[0110] In one embodiment, in the deployed state of FIG. 10, the second guide pin 249 is located at the first end 271a of the third guide groove 271, and the fourth guide pin 259 is located at the first end 272a of the fourth guide groove 272. In various embodiments, the deployed state includes a state in which each of the third portion 270 a and fourth portion 270 b of the second link structure 270 at least partially contacts the second securing member 238 .

[0111] In one embodiment, in the fully folded state of FIG. 11, the second guide pin 249 is located at the second end 271b of the third guide groove 271, and the fourth guide pin 259 is located at the second end 272b of the fourth guide groove 272. In various embodiments, the fully folded state includes a state in which the third portion 270a of the second link structure 270 at least partially contacts the second connecting portion 242 of the first arm portion 240 and the fourth portion 270b of the second link structure 270 at least partially contacts the fourth connecting portion 252 of the second arm portion 250.

[0112] In one embodiment, the distance measured in the axial direction between the first end (271a, 272a) and the second end (271b, 272b) of each of the third guide groove 271 and the fourth guide groove 272 is formed to be substantially the same as the second spacing d2.

[0113] In various embodiments, the first distance d1 and the second distance d2 are the same. For example, the displacement of the first link structure 260 and the displacement of the second link structure 270 are the same. However, the displacement of the first link structure 260 (for example, the first distance d1) and the displacement of the second link structure 270 (for example, the second distance d2) are not necessarily limited to being the same. For example, the second link structure 270 may be configured to have a greater axial displacement than the first link structure 260 . Here, the third guide groove 271 and the fourth guide groove 272 of the second link structure 270 may be extended further in the axial direction, and the second fixing member 238 and the arm portions (240, 250) may be arranged to have a larger gap between them to take into account the increased displacement.

[0114] Referring to the folding operation in which the hinge structure 200 moves from the unfolded state shown in FIG. 10 to the folded state shown in FIG. 11, the first rotating structure 210, the first arm portion 240, and the first arm axis 240S rotate clockwise when viewed in the second axis direction (2). The first guide pin 248 and the second guide pin 249 provided on the first arm shaft 240S rotate clockwise. The second rotating structure 220, the second arm portion 250, and the second arm shaft 250S rotate counterclockwise when viewed in the second axis direction (2). The third guide pin 258 and the fourth guide pin 259 provided on the second arm shaft 250S rotate counterclockwise. The first link structure 260 is configured to move in a second axial direction (2) and the second link structure 270 is configured to move in a first axial direction (1). In one embodiment, the center bar 280 moves in the -z axis direction in the folding action. For example, the center bar 280 moves in the −z-axis direction while the second protruding portion 284 of the center bar 280 is housed in the second hole 2381 of the second fixing member 238.

[0115] Referring to the unfolding operation in which the hinge structure 200 moves from the folded state shown in FIG. 11 to the unfolded state shown in FIG. 10, the first rotating structure 210, the first arm portion 240, and the first arm axis 240S rotate counterclockwise when viewed in the second axis direction (2). The first guide pin 248 and the second guide pin 249 provided on the first arm shaft 240S rotate counterclockwise. The second rotating structure 220, the second arm portion 250, and the second arm shaft 250S rotate clockwise when viewed in the second axis direction (2). The third guide pin 258 and the fourth guide pin 259 provided on the second arm shaft 250S rotate clockwise. The first link structure 260 is configured to move in a first axial direction (1) and the second link structure 270 is configured to move in a second axial direction (2). In one embodiment, the center bar 280 moves in the z-axis direction in a folding motion. For example, the center bar 280 moves in the z-axis direction while the second protruding portion 284 of the center bar 280 is housed in the second hole 2381 of the second fixing member 238.

[0116] In one embodiment, the movement direction of the first link structure 260 and the second link structure 270 is related to the extension direction of the guide grooves (261, 262, 271, 272). For example, the first guide groove 261 and the second guide groove 262 of the first link structure 260 are positioned such that the second ends (261b, 262b) are in the first axial direction (1) of the first ends (261a, 262a), and accordingly, the first link structure 260 moves in the second axial direction (2) from the folding operation. For example, the third guide groove 271 and the fourth guide groove 272 of the second link structure 270 are positioned such that the second ends (271b, 272b) are in the second axial direction (2) of the first ends (271a, 272a), and accordingly, the second link structure 270 moves in the first axial direction (1) from the folding operation.

[0117] Although Figures 10 and 11 show the first link structure 260 and the second link structure 270 moving in opposite directions, the hinge structure 200 according to the embodiments disclosed herein is not necessarily limited to moving in opposite directions. In various embodiments, the first link structure 260 and the second link structure 270 may be configured to move in the same direction. In an embodiment, the guide grooves 261 and 262 of the first link structure 260 and the guide grooves 271 and 272 of the second link structure 270 may extend in the same direction.

[0118] FIG. 12 is a diagram showing a link structure of a hinge structure in an unfolded state according to one embodiment of the present invention, and FIG. 13 is a diagram showing a link structure of a hinge structure in a fully folded state according to one embodiment of the present invention. In one embodiment, the first central portion 260c of the first link structure 260 defines a first opening 263. A portion of the side wall of the first opening 263 includes a first inclined surface 264 . The first inclined surface 264 is in at least partial contact with the third inclined surface 281 a of the first inclined protrusion 281 . In one embodiment, the first inclined surface 264 is formed to be inclined toward the −z-axis direction as it approaches the first axis direction (1).

[0119] In one embodiment, the second central portion 270c of the second link structure 270 defines a second opening 273 therein. A portion of the side wall of the second opening 273 includes a second inclined surface 274 . The second inclined surface 274 is in at least partial contact with the fourth inclined surface 282 a of the second inclined protrusion 282 . In one embodiment, the second inclined surface 274 is formed to be inclined in the z-axis direction as it approaches the first axis direction (1).

[0120] In one embodiment, at least a portion of each of the first protruding portion 283 and the first elastic member 288 is disposed inside the first hole 2361 of the first fixing member 236 . A first step portion 2363 is formed on the inner surface of the first hole 2361, facing the first flange 283b of the first protruding portion 283 or the head of the first screw 283a in the z-axis direction. The first step portion 2363 supports the first elastic member 288.

[0121] In one embodiment, at least a portion of each of the second protruding portion 284 and the second elastic member 289 is disposed inside the second hole 2381 of the second fixing member 238. A second step portion 2383 is formed on the inner surface of the second hole 2381, facing the second flange 284b of the second protruding portion 284 or the head of the second screw 284a in the z-axis direction. The second step portion 2383 supports the second elastic member 289 .

[0122] In one embodiment, the center bar 280 is coupled to the first link structure 260, the second link structure 270, the first fixed member 236, and the second fixed member 238 for movement in the z-axis direction. In one embodiment, the center bar 280 includes a first inclined protrusion 281, a second inclined protrusion 282, a first protruding portion 283, and a second protruding portion 284 that protrude in the −z-axis direction. In one embodiment, the center bar 280 is positioned such that the first inclined protrusion 281 is at least partially received in the first opening 263 of the first link structure 260, the second inclined protrusion 282 is at least partially received in the second opening 273 of the second link structure 270, the first protruding portion 283 is at least partially received in the first hole 2361 of the first fixing member 236, and the second protruding portion 284 is at least partially received in the second hole 2381 of the second fixing member 238.

[0123] In one embodiment, the first protruding portion 283 includes a first flange 283b formed at the -z axis end. The first flange 283b supports one side of the first elastic member 288. In various embodiments, the first protruding portion 283 includes a first protruding boss and a first screw 283a fastened to the first protruding boss. The head of the first screw 283a forms a first flange 283b. However, the first protruding portion 283 is not limited to being formed by combining the first protruding boss and the first screw 283a, and the first protruding portion 283 may include various step structures or flange structures that can support the first elastic member 288.

[0124] In one embodiment, the second protruding portion 284 includes a second flange 284b formed at the -z axis end. The second flange 284b supports one side of the second elastic member 289. In various embodiments, the second protruding portion 284 includes a second protruding boss and a second screw 284a fastened to the second protruding boss. The head of the second screw 284a forms a flange. However, the second protruding portion 284 is not limited to being formed by combining the second protruding boss and the second screw 284a, and the second protruding portion 284 may include various step structures or flange structures that can support the second elastic member 289.

[0125] In one embodiment, the first elastic member 288 is positioned to encase at least a portion of the first protruding portion 283 . The first elastic member 288 is supported on one side by the first flange 283b of the first protruding portion 283 or the head of the first screw 283a, and on the other side by the first stepped portion 2363 of the first hole 2361 of the first fixing member 236. For example, the first step portion 2363 faces the first flange 283b of the first protruding portion 283 or the head of the first screw 283a in the z-axis direction. In various embodiments, the first elastic member 288 is in a compressed state in the unfolded state of FIG. 12, and in a tensioned state compared to the unfolded state in the fully folded state of FIG. For example, the first elastic member 288 is in a more compressed state in both the unfolded and fully folded states compared to the equilibrium state. In one embodiment, the first elastic member 288 is configured to be supported by the first step portion 2363 in the deployed state and to press the first flange 283b of the first protruding portion 283 in the −z axis direction. As a result, the center bar 280 moves a predetermined distance h in the -z axis direction in the fully folded state, providing a space in which the folding area 143 of the display 140 is located in the folded state (e.g., Figure 2b) or the fully folded state (e.g., Figure 2c).

[0126] In one embodiment, the second elastic member 289 is positioned to encase at least a portion of the second protruding portion 284 . The second elastic member 289 is supported on one side by the second flange 284b of the second protruding portion 284 or the head of the second screw 284a, and on the other side by the second step portion 2383 of the second hole 2381 of the second fixing member 238. For example, the second step portion 2383 faces the second flange 284b of the second protruding portion 284 or the head of the second screw 284a in the z-axis direction. In various embodiments, the second elastic member 289 is in a compressed state in the unfolded state of FIG. 12, and in a tensioned state compared to the unfolded state in the fully folded state of FIG. For example, the second elastic member 289 is in a state where it is further compressed in both the unfolded state and the fully folded state compared to the equilibrium state. In one embodiment, the second elastic member 289 is supported by the second step portion 2383 in the deployed state and is configured to press the second flange 284b of the second protruding portion 284 in the −z axis direction. As a result, the center bar 280 moves a predetermined distance h in the -z axis direction in the fully folded state, providing a space in which the folding area (e.g., folding area 143 in Figure 2b) of the display (e.g., display 140 in Figure 2b) is located in the folded state (e.g., Figure 2b) or fully folded state (e.g., Figure 2c).

[0127] In one embodiment, the first angled protrusion 281 includes a third angled surface 281 a that at least partially contacts the first angled surface 264 of the first link structure 260 . The third inclined surface 281a is formed so as to be inclined more in the -z-axis direction as it goes in the first axis direction (1). The third inclined surface 281a and the first inclined surface 264 are in at least partial surface contact with each other. In various embodiments, the direction of inclination of the third inclined surface 281 a is related to the direction of the first inclined surface 264 of the first link structure 260 and the direction of movement of the first link structure 260 . For example, the third inclined surface 281a is inclined so that the center bar moves in the -z axis direction during the folding operation. For example, the inclination directions of the third inclined surface 281a and the first inclined surface 264 may be varied depending on the movement direction of the first link structure 260.

[0128] In one embodiment, the second angled protrusion 282 includes a fourth angled surface 282 a that at least partially contacts the second angled surface 274 of the second link structure 270 . The fourth inclined surface 282a is formed so as to be inclined more in the z-axis direction as it goes in the first axis direction (1). The fourth inclined surface 282a and the second inclined surface 274 are in at least partial surface contact. In various embodiments, the direction of inclination of the fourth angled surface 282 a is related to the direction of the second angled surface 274 of the second link structure 270 and the direction of movement of the second link structure 270 . For example, the fourth inclined surface 282a is inclined so that the center bar 280 moves in the -z axis direction during the folding operation. For example, the inclination directions of the fourth inclined surface 282a and the second inclined surface 274 may be varied depending on the direction of movement of the second link structure 270.

[0129] In one embodiment, the hinge structure 200 folds from the unfolded state shown in FIG. 12 to the folded state shown in FIG. During the folding operation, the first rotating structure 210, the first arm portion 240, and the first arm shaft 240S rotate clockwise. During the folding operation, the second rotating structure 220, the second arm portion 250, and the second arm shaft 250S rotate counterclockwise. Referring to FIGS. 10 and 11 described above, the first guide pin 248 and the third guide pin 258 cause the first link structure 260 to move in the second axial direction (2). The compressed first elastic member 288 presses the first flange 283b of the first protruding portion 283 in the −z axis direction. Here, the first inclined surface 264 moves in the second axis direction (2) along the third inclined surface 281a, and the third inclined surface 281a moves in the −z axis direction due to the first inclined surface 264. In this way, the center bar 280 moves in the −z-axis direction due to the pressure of the first elastic member 288 and the movement of the first inclined surface 264 of the first link structure 260.

[0130] Referring to the above-mentioned FIGS. 10 and 11, the second guide pin 249 and the fourth guide pin 259 cause the second link structure 270 to move in the first axial direction (1). The compressed second elastic member 289 presses the second flange 284b of the second protruding portion 284 in the −z axis direction. Here, the second inclined surface 274 moves in the first axis direction (1) along the fourth inclined surface 282a, and the fourth inclined surface moves in the -z axis direction due to the second inclined surface 274. In this way, the center bar 280 moves in the −z-axis direction due to the pressure of the second elastic member 289 and the movement of the second inclined surface 274 of the second link structure 270. In one embodiment, the center bar 280 moves in the -z axis direction by a predetermined distance h during the folding operation, thereby providing space to accommodate a folding area (e.g., folding area 143 in FIG. 2b) of a display (e.g., display 140 in FIG. 2b).

[0131] In one embodiment, the hinge structure 200 folds from the fully folded state shown in FIG. 13 to the unfolded state shown in FIG. During the unfolding operation, the first rotating structure 210, the first arm portion 240, and the first arm shaft 240S rotate counterclockwise. In the unfolding operation, the second rotating structure 220, the second arm section 250, and the second arm shaft 250S rotate clockwise.

[0132] Referring to the above-mentioned FIGS. 10 and 11, the first guide pin 248 and the third guide pin 258 cause the first link structure 260 to move in the first axial direction (1). As the first link structure moves, the first inclined surface 264 presses the third inclined surface 281a in the z-axis direction. Here, the relatively tensioned first elastic member 288 is gradually compressed as the deployment operation is carried out. The first inclined surface 264 moves in the first axis direction (1) along the third inclined surface 281a, and the third inclined surface 281a moves in the z-axis direction along the first inclined surface 264. In this way, the movement of the first inclined surface 264 of the first link structure 260 causes the center bar 280 to move in the z-axis direction.

[0133] Referring to the above-mentioned FIGS. 10 and 11, the second guide pin 249 and the fourth guide pin 259 cause the second link structure 270 to move in the second axial direction (2). As the second link structure 270 moves, the second inclined surface 274 presses the fourth inclined surface 282a in the z-axis direction. Here, the relatively stretched second elastic member 289 is gradually compressed as the deployment operation is carried out. The second inclined surface 274 moves in the second axis direction (2) along the fourth inclined surface 282a, and the fourth inclined surface 282a moves in the z-axis direction along the second inclined surface 274. In this way, the movement of the second inclined surface 274 of the second link structure 270 causes the center bar 280 to move in the z-axis direction. In one embodiment, the center bar 280 moves in the z-axis direction during the unfolding operation, thereby supporting the rear surface of the folding area 143 of the display 140 in a flat plane in the unfolded state.

[0134] In various embodiments, the inclined surfaces (264, 274) of the link structures (260, 270) are formed to be inclined upward in the z-axis direction as they move in the direction of movement of the link structures (260, 270) during the folding operation. For example, the first inclined surface 264 of the first link structure 260 is inclined upward in the z-axis direction as it approaches the second axis direction (2), and the second inclined surface 274 of the second link structure 270 is inclined upward in the z-axis direction as it approaches the first axis direction (1).

[0135] In various embodiments, the first inclined surface 264 and the third inclined surface 281a are inclined so as to be able to at least partially come into surface contact with each other. In various embodiments, the angle of inclination of the first inclined surface 264 is determined taking into consideration the axial displacement of the first link structure 260 and the z-axis displacement of the center bar. For example, when the first link structure 260 moves by a first distance, the center bar 280 moves in the z-axis direction by a predetermined distance h, so that the magnitude of the inclination angles of the first inclined surface 264 and the third inclined surface 281a is The file is TIFF0007785783000001.tif13128.

[0136] In various embodiments, the second inclined surface 274 and the fourth inclined surface 282a are inclined so as to be able to at least partially come into surface contact with each other. In various embodiments, the angle of inclination of the second inclined surface 274 is determined taking into consideration the axial displacement of the second link structure 270 and the z-axis displacement of the center bar 280 . For example, when the second link structure 270 moves by the second distance d2, the center bar moves in the z-axis direction by a predetermined interval h, so that the magnitude of the inclination angle of each of the second inclined surface 274 and the fourth inclined surface 282a is The file is TIFF0007785783000002.tif13128. As described above, the first distance d1 and the second distance d2 are different from each other, and therefore the inclination angle of the first inclined surface 264 and the inclination angle of the second inclined surface 274 are different.

[0137] FIG. 14 is a diagram showing a link structure of a hinge structure in an unfolded state according to one embodiment of the present invention, and FIG. 15 is a diagram showing a link structure of a hinge structure in a fully folded state according to one embodiment of the present invention. In one embodiment, the center bar 280 is configured to maintain a horizontal position in both the unfolded state and the folded state (e.g., the fully folded state of FIG. 15). For example, referring to a cross-sectional view, center bar 280 is configured so that the normal vector of the surface facing the rear surface of a display (eg, display 140 in FIG. 1) is oriented substantially in the z-axis direction. In one embodiment, the center bar 280 moves while remaining horizontal during folding and unfolding operations.

[0138] In one embodiment, the center bar 280 includes a first region (280-1) in which a first inclined protrusion 281 is formed and a second region (280-2) in which a second inclined protrusion 282 is formed. The center bar 280 is configured so that the first area (280-1) and the second area (280-2) have the same height in any state to maintain horizontality. For example, in the unfolded state of FIG. 14, the fully folded state of FIG. 15, and any folded state between the unfolded state and the fully folded state, the center bar 280 has the first region (280-1) and the second region (280-2) having the same height in the z-axis direction.

[0139] Referring to FIG. 14, in the unfolded state, the first region (280-1) and the second region (280-2) of the center bar 280 each have a first height h1 from the reference line. Referring to the cross-sectional view, the first inclined protrusion 281 and the second inclined protrusion 282 of the center bar 280 have the same height in the z-axis direction in the unfolded state.

[0140] Referring to FIG. 15, in the fully folded state, the first region (280-1) and the second region (280-2) of the center bar 280 each have a second height h2 from the reference line. Referring to the cross-sectional view, the first inclined protrusion 281 and the second inclined protrusion 282 of the center bar 280 have the same height in the z-axis direction in the fully folded state.

[0141] In any state between the unfolded state and the fully folded state, the first region (280-1) and the second region (280-2) of the center bar 280 each have a height from the reference line that is smaller than a first height h1 and greater than a second height h2. For example, the first inclined protrusion 281 and the second inclined protrusion 282 of the center bar 280 have the same height in the z-axis direction in any folded state. In various embodiments, the difference between the first height h1 and the second height h2 is substantially the same as the predetermined distance h shown in FIGS.

[0142] In various embodiments, the first angled surface 264 of the first link structure 260 and the second angled surface 274 of the second link structure 270 have different slopes. However, the first inclined surface 264 and the second inclined surface 274 are formed so that the first region (280-1) and the second region (280-2) of the center bar 280 have the same height in the z-axis direction in any state between the fully folded state and the unfolded state. For this reason, the third inclined surface 281a, the fourth inclined surface 282a, the first inclined surface 264, and the second inclined surface 274 are provided as substantially flat surfaces.

[0143] FIG. 16 is a diagram illustrating how the center bar is kept horizontal when tilt occurs in the hinge structure according to an embodiment of the present invention. Although only the first link structure is shown in FIG. 16, the following description can be applied to the second link structure as well.

[0144] Referring to FIG. 16, tilt may occur in the hinge structure 200. Tilt includes a state in which the first link structure 260 rotates about an axis parallel to the z-axis. The tilt means that a difference in the movement distance between the first portion 260a and the second portion 260b of the first link structure 260 occurs due to a difference in the rotation angle between the first arm shaft 240S and the second arm shaft 250S. For example, if the user folds or unfolds the first housing 110 and the second housing 120 with uneven force, a difference in the rotation angle of the first arm shaft 240S and the second arm shaft 250S may occur. The difference in rotation angle may cause a difference in the rotation angle of the first guide pin 248 and the rotation angle of the third guide pin 258, which may cause a difference in axial displacement between the first portion 260a and the second portion 260b of the first link structure 260. For example, referring to the drawing, as the first portion 260a of the first link structure 260 moves further in the first axis direction (1) compared to the second portion 260b, the first link structure 260 may tilt counterclockwise around an axis parallel to the z-axis.

[0145] In one embodiment, the center bar 280 maintains the horizontal position even when the hinge structure 200 is tilted. The center bar 280 is supported in the z-axis direction by the first inclined surface 264 of the first link structure 260. Therefore, the first inclined surface 264 forms a uniform height in the z-axis direction regardless of whether tilt occurs or not. The center bar 280 of the hinge structure 200 is configured to maintain horizontality even when tilting occurs in the first link structure 260.

[0146] For example, the hinge structure according to the comparative example includes a gear structure for interlocking the rotation of the first rotating structure and the second rotating structure. The gear structure includes a first gear corresponding to the rotation of the first rotating structure, a second gear corresponding to the rotation of the second rotating structure, and an idle gear connecting the first gear and the second gear. Depending on the gear structure, backlash may occur between the meshing gears. Backlash can cause the first and second rotating structures to become uncoupled (eg, tilt).

[0147] The hinge structure 200 according to the embodiment disclosed herein links the first rotating structure 210 and the second rotating structure 220 via the spiral guide grooves (261, 262, 271, 272) of the link structures (260, 270) and the guide pins (248, 249, 258, 259) of the arm shafts (240S, 250S). This reduces or eliminates backlash compared to hinge structures that include gear structures. Furthermore, the link structures (260, 270) require a relatively smaller space than the gear structure of the comparative example, so that a relatively slimmer hinge structure 200 and / or electronic device 100 can be realized.

[0148] For example, the hinge structure according to the comparative example includes a center bar that is driven by each of a first rotating structure and a second rotating structure. In this case, if the first rotating structure and the second rotating structure become unlinked (e.g., tilt), the center bar may not be able to maintain its horizontal position. The hinge structure 200 according to the embodiment disclosed herein is configured such that the center bar 280 is linked via link structures (260, 270) that move axially during folding and unfolding operations, allowing the center bar 280 to maintain horizontality even when the first rotating structure 210 and the second rotating structure 220 become unlinked (e.g., tilted).

[0149] FIG. 17a shows examples of cam structures according to various embodiments of the present invention, and FIG. 17b shows the engagement of cam structures according to various embodiments of the present invention. Before describing, a cam 1700a according to one embodiment of the present invention can be applied to at least one of the cam structures described above with reference to FIGS.

[0150] Referring to FIG. 17a, a cam 1700a (or cam structure) according to one embodiment of the present invention includes a cam support B0, a plurality of peaks (M1, M2, M3) and a plurality of valleys (V1, V2). Although the figure shows a cam 1700a including three peaks (M1, M2, M3) and two valleys (V1, V2) (the valley hidden by the first peak M1 is not shown), the present invention is not limited thereto. For example, the cam 1700a may have a structure that includes three or more cams and valleys. The multiple mountains (M1, M2, M3) all have the same structure. Alternatively, at least one of the multiple peaks (M1, M2, M3) may have a different shape from the other peaks. For example, as shown in the figure, at least one of the peaks may have a structure in which the second portion P2 corresponding to the center of the peak is formed at a predetermined inclination angle (an inclination angle greater than 0 degrees, for example, approximately 5 degrees), and at least one of the remaining peaks may have a structure in which the center portion of the peak is flat.

[0151] According to one embodiment, at least one of the plurality of peaks (M1, M2, M3), for example, the first peak M1, includes a first portion P1 having a first inclination angle as1, a second portion P2 having a second inclination angle as2, and a third portion P3 having a third inclination angle as3, as shown in the figure. One side (e.g., the -x-axis end) of the first portion P1 is connected to one side (e.g., the x-axis end) of the first valley V1, and the other side (e.g., the x-axis end) of the first portion P1 is arranged to be connected to one side (e.g., the -x-axis end) of the second portion P2. The first portion P1 is formed, for example, by a ridgeline having a first inclination angle as1 with respect to the x-axis. The first tilt angle as1 includes an acute angle less than 90° from the -x-axis toward the x-axis with respect to the y-axis.

[0152] The second part P2 is arranged so that one side (e.g., the -x-axis end) is connected to the other side (e.g., the x-axis end) of the first part P1, and the other side (e.g., the x-axis end) of the second part P2 is connected to one side (e.g., the -x-axis end) of the third part P3. The second portion PT2 is disposed so as to protrude further in the y-axis direction than the first portion P1 and the third portion P3. The boundary region between the first portion P1 and the second portion P2 is rounded with a specified first curvature R1. The second portion P2 has a second tilt angle as2 with respect to the x-axis. The second tilt angle as2 includes an acute angle less than 90° from the -x-axis toward the x-axis with respect to the y-axis, and the absolute value of the second tilt angle as2 is smaller than the absolute value of the first tilt angle as1.

[0153] The third portion P3 is arranged so that one side (e.g., the -x-axis end) is connected to the other side (e.g., the x-axis end) of the second portion P2, and the other side (e.g., the x-axis end) of the third portion P3 is connected to one side (e.g., the -x-axis end) of the second valley V2. The third portion P3 is formed to have a predetermined inclination angle inclined toward the x-axis from the second portion P2. The boundary region between the second portion P2 and the third portion P3 is rounded with a specified second curvature R2. The second curvature R2 has a smaller value than the first curvature R1 (for example, the first curvature R1 is gentler than the second curvature R2). The third portion P3 has a third tilt angle as3 with respect to the -x-axis. The third tilt angle as3 includes an acute angle less than 90° from the x-axis toward the -x-axis direction with respect to the y-axis, and the absolute value of the third tilt angle as3 is greater than the absolute value of the second tilt angle as2. According to various embodiments, the absolute value of the third tilt angle as3 is the same as or even greater than the absolute value of the first tilt angle as1.

[0154] Referring to Figure 17b, the cam profile described in Figure 17a is applied to at least one cam or at least one cam structure described in Figures 2 to 26 above. For example, in the figure, the protrusion of cam 1700a is arranged to protrude in the -y-axis direction from the y-axis, and the protrusion of cam structure 1700b is arranged to protrude in the y-axis direction from the -y-axis. Alternatively, the concave and convex portions of cam 1700a and the concave and convex portions of cam structure 1700b are arranged to face each other. At least a portion of the second portion (1700a_P2) of cam 1700a and at least a portion of the second portion (1700b_P2) of cam structure 1700b contact each other during the free stop section (the section in which the electronic device (e.g., electronic device 100 of FIG. 2) is placed within a specified angular range due to friction between cam 1700a and cam structure 1700b), as shown in the figure. According to one embodiment, when the electronic device has the free stop state described in FIG. 15 or FIG. 16, the display (display 160 in FIG. 1 or FIG. 2) exerts a repulsive force to return to the unfolded state (FIG. 14 state).

[0155] In one embodiment, cam 1700a is biased in the x-axis direction by the restoring force of the display (e.g., the repulsive force of the display acts counterclockwise), and cam structure 1700b is biased in the -x-axis direction by the restoring force of the display (e.g., the repulsive force of the display acts clockwise). During this process, the second portion (1700a_P2) of cam 1700a and the second portion (1700b_P2) of cam structure 1700b come into contact with each other at the above-mentioned second inclination angle as2, and therefore, cam 1700a and cam structure 1700b of the present invention can offset at least a portion of the repulsive force (or restoring force) generated in the direction of display expansion, and can suppress free-stop state pressure (e.g., change in the angle between the first housing (e.g., first housing 110 in Figure 1 or Figure 2) and the second housing (e.g., second housing 120 in Figure 1 or Figure 2)) that may occur regardless of the user's intention.

[0156] According to various embodiments, the electronic device has a resting state (or free stop state) at a particular angle, as shown in FIG. 15 or FIG. 16 above. In this case, the electronic device is positioned so that cam 1700a and cam structure 1700b engage as shown in the figure, and the repulsive or restoring force of the display offsets the force acting in the unfolded state as in FIG. FIG. 17b illustrates a structure in which the peak portions of both the cam 1700a and the cam structure 1700b have the second inclination angle as2, but the present invention is not limited to this. For example, the second portion P2 having the second inclination angle as2 may be formed on only one of the cam 1700a or the cam structure 1700b. On the other hand, with respect to the rotation in the deployment direction, FIG. 17b describes the rotation of cam 1700a from the -x-axis (or left side) to the x-axis (or right side) as the reference, but the present invention is not limited to this. For example, depending on the design style of the electronic device, the direction in which the cam 1700a rotates from the x-axis to the -x-axis direction may be the direction in which the display moves from the folded state to the unfolded state.

[0157] An electronic device according to an embodiment disclosed herein includes a first housing 110 and a second housing 120, a hinge structure 200 connected to the first housing 110 and the second housing 120 such that the first housing 110 rotates about a first rotation axis R1 parallel to the axial direction and the second housing 120 rotates about a second rotation axis R2 parallel to the axial direction, and a display 140 arranged to cover the first housing 110, the second housing 120, and the hinge structure 200, wherein the display 140 includes a folding region 143 that is flat in an unfolded state and curved in a folded state, the hinge structure 200 extends in a direction parallel to the axial direction and is rotatably connected to a fixed structure 230, and the hinge structure 200 rotates the first rotation axis R1 and the second rotation axis R2 parallel to the axial direction. the first arm shaft 240S extending in a direction parallel to the axial direction, rotatably coupled to the fixed structure 230, and rotating in response to the rotation of the second rotating structure 220; a first link structure 260 coupled to each of the first arm shaft 240S and the second arm shaft 250S; wherein the first link structure 260 is configured to move linearly in the axial direction by the rotation of the first arm shaft 240S and the second arm shaft 250S, and a center bar 280 at least partially overlapping with the folding region 143 of the display 140 when viewed from above; wherein the center bar 280 is coupled to the first link structure 260 and configured to move in a direction perpendicular to the axial direction in response to the linear movement of the first link structure 260.

[0158] In various embodiments, the first arm shaft 240S includes a first guide pin 248 protruding from its outer surface, the second arm shaft 250S includes a third guide pin 258 protruding from its outer surface, and the link structure 260 includes a first portion 260a coupled to the first arm shaft 240S and at least partially housing the first guide pin 248, a second portion 260b coupled to the second arm shaft 250S and at least partially housing the third guide pin 258, and a central portion 260c connecting the first portion 260a and the second portion 260b.

[0159] In various embodiments, the first guide groove 261 extends a first length in the extension direction of the first arm shaft 240S and extends at a first angle in the circumferential direction of the first arm shaft 240S, the second guide groove 262 extends a second length in the extension direction of the second arm shaft 250S and extends at a second angle in the circumferential direction of the second arm shaft 250S, the first length and the second length being substantially the same, and the first angle and the second angle being substantially the same in magnitude but opposite in direction.

[0160] In various embodiments, in the unfolded state, a direction perpendicular to the axial direction from the center bar 280 toward the folding region 143 is defined as a first direction (e.g., the z-axis direction), and the center bar 280 is configured to move in the first direction during an unfolding operation in which the hinge structure 200 moves from the folded state to the unfolded state, and the center bar 280 is configured to move in a second direction opposite to the first direction (e.g., the -z-axis direction) during a folding operation in which the hinge structure 200 moves from the unfolded state to the folded state.

[0161] In various embodiments, the link structure 260 includes a first portion 260a coupled to the first arm shaft 240S, a second portion 260b coupled to the second arm shaft 250S, and a central portion 260c connecting the first portion 260a and the second portion 260b, an opening 263 is formed in the central portion 260c of the link structure 260, and a side wall of the opening 263 includes a first inclined surface 264 having a predetermined inclination angle with respect to the axial direction, the center bar 280 includes an inclined protrusion 281 at least a portion of which is located inside the opening 263, and the inclined protrusion 281 includes a third inclined surface 281a that at least partially contacts the first inclined surface 264, and as the link structure 260 moves linearly in the axial direction, the first inclined surface 264 presses against the third inclined surface 281a so that the center bar 280 moves toward the first direction or the second direction.

[0162] In various embodiments, the hinge structure 200 further includes a fixed structure 230 supporting the first arm shaft 240S and the second arm shaft 250S, and a fixed member 238 supporting the first arm shaft 240S and the second arm shaft 250S and arranged at a position axially spaced apart from the fixed structure 230, and the center bar 280 includes a protruding portion 283 at least a portion of which extends into a hole 2361 formed in the fixed member 236, and an elastic member 288 arranged in the first protruding portion 283 and configured to provide an elastic force to the center bar 280, and the elastic member 288 is configured to be compressed during the unfolding operation and tensioned during the folding operation.

[0163] In various embodiments, the hinge structure 200 includes a second link structure 270 disposed at a position axially spaced apart from the first link structure 260 and configured to move linearly in the axial direction, the second link structure 270 including a third portion 270a coupled to the first arm shaft 240S and having a third guide groove 271 formed therein in which the second guide pin 249 of the first arm shaft 240S is at least partially received, a fourth portion 270b coupled to the second arm shaft 250S and having a fourth guide pin 259 of the second arm shaft 250S at least partially received, and a fifth portion 270c coupled to the second arm shaft 250S and having a fourth guide groove 271 formed therein in which the fourth guide pin 259 of the second arm shaft 250S is at least partially received. The center bar 280 includes a fourth portion 270b in which a fourth guide groove 272 is formed, and a second central portion 270c connecting the third portion 270a and the fourth portion 270b, and a second opening 273 is formed in the second central portion 270c, and the side wall of the second opening 273 includes a second inclined surface 274 having a predetermined inclination angle with respect to the axial direction.The center bar 280 includes a second inclined protrusion 282 at least a portion of which is located inside the second opening 273, and the second inclined protrusion 282 includes a fourth inclined surface 282a that at least partially contacts the second inclined surface 274.

[0164] In various embodiments, the second link structure 270 is configured to move in the same direction as or opposite to the link structure 260 and to compress the center bar 280 in the same direction that the link structure 260 compresses the center bar 280.

[0165] In various embodiments, the hinge structure 200 further includes a fixed structure 230 that supports the first arm shaft 240S and the second arm shaft 250S, and a fixed member 238 that supports the first arm shaft 240S and the second arm shaft 250S and is positioned axially spaced apart from the fixed structure 230, the hinge structure 200 further includes a first arm portion 240 coupled to the first arm shaft 240S so as to rotate together with the first arm shaft 240S, and a second arm portion 250 coupled to the second arm shaft 250S so as to rotate together with the second arm shaft 250S, and the link structure is configured such that the first portion 260a is located between the first arm portion 240 and the fixed structure 230, and the second portion 260b is located between the second arm portion 250 and the fixed structure 230.

[0166] In various embodiments, in the deployed state, the link structure 260 is configured to at least partially contact one of the first arm portion 240 and the second arm portion 250 or the fixed structure 230 .

[0167] In various embodiments, the hinge structure 200 includes first cam structures (244, 245, 291, 293) coupled to the first arm shaft 240S, first elastic members (295a, 295b) compressed or tensioned by the first cam structures (244, 245, 291, 293), second cam structures (254, 255, 292, 294) coupled to the second arm shaft 250S, and second elastic members (295c, 295d) compressed or tensioned by the second cam structures (254, 255, 292, 294), and the first cam structures (244, 245, 291, 293) The second cam structure (254, 255, 292, 294) includes a first arm cam (244, 245) formed on the arm portion 240 and rotating together with the first arm portion 240, and a first linear cam (291, 293) linearly movably coupled to the first arm shaft 240S and meshing with the first arm cam (244, 245), and the second cam structure (254, 255, 292, 294) includes a second arm cam (254, 255) formed on the second arm portion 250 and rotating together with the second arm portion 250, and a second linear cam (292, 294) linearly movably coupled to the second arm shaft 250S and meshing with the second arm cam (254, 255).

[0168] The hinge structure according to the embodiment disclosed herein includes a fixed structure 230, a first rotating structure 210 coupled to a first guide rail 233 of the fixed structure 230 so as to be rotatable about a first rotation axis R1, a first arm shaft 240S extending in a direction parallel to the first rotation axis R1 and rotatably connected to the fixed structure 230, wherein the first arm shaft 240S includes a first guide pin 248 protruding from an outer surface thereof, a first arm portion 240 coupled to the first arm shaft 240S so as to rotate about the first arm shaft 240S and slidably connected to the first rotating structure 210, a second rotating structure 220 coupled to a second guide rail 234 of the fixed structure 230 so as to be rotatable about a second rotation axis R2, and a first arm portion 240 extending in a direction parallel to the second rotation axis R2. a second arm section 250 coupled to the second arm shaft 250S so as to rotate around the second arm shaft 250S and slidably coupled to the second rotating structure 220; a first link structure 260 including a first portion 260a through which the first arm shaft 240S passes and in which a first guide groove 261 is formed and in which the first guide pin 248 is at least partially housed; a second portion 260b through which the second arm shaft 250S passes and in which a second guide groove 262 is formed and in which the third guide pin 258 is at least partially housed; and a central portion 260c connecting the first portion 260a and the second portion 260b.

[0169] In various embodiments, the first link structure 260 is configured to move linearly in the extension direction of the first arm shaft 240S and the second arm shaft 250S when the first arm shaft 240S and / or the second arm shaft 250S rotates.

[0170] In various embodiments, the first link structure 260 is configured to link the first arm shaft 240S and the second arm shaft 250S so that they rotate in opposite directions but at the same angle.

[0171] In various embodiments, each of the first guide groove 261 and the second guide groove 262 is provided in a spiral shape.

[0172] In various embodiments, when the first arm shaft 240S rotates in a first rotational direction and the second arm shaft 250S rotates in a second rotational direction opposite to the first rotational direction, the first guide pin 248 and the third guide pin 258 are each configured to apply pressure to the link structure in the same direction.

[0173] In various embodiments, the first guide groove 261 extends a first length in the extension direction of the first arm shaft 240S and extends at a first angle in the circumferential direction of the first arm shaft, and the second guide groove 262 extends a second length in the extension direction of the second arm shaft 250S and extends at a second angle in the circumferential direction of the second arm shaft, the first length and the second length being substantially the same, and the first angle and the second angle being substantially the same in magnitude but opposite in direction.

[0174] In various embodiments, the arm further includes a center bar 280 that at least partially overlaps a central portion of the first link structure 260, and the center bar 280 is configured to move in conjunction with the rotation of the first arm shaft 240S and the second arm shaft 250S via the first link structure 260.

[0175] In various embodiments, a first central portion 260c of the first link structure 260 has a first opening 263 formed therein, a portion of the side wall of the first opening 263 includes a first inclined surface 264, the center bar 280 includes a first inclined protrusion 281 at least partially received within the first opening 263, and the first inclined protrusion 281 includes a third inclined surface 281a that at least partially contacts the first inclined surface 264.

[0176] In various embodiments, the hinge structure is configured such that during folding and unfolding operations, the link structure 260 moves linearly along the first arm axis 240S and the second arm axis 250S, and the center bar 280 moves in a direction perpendicular to the linear movement direction in response to the linear movement.

[0177] It should be understood that the various embodiments and terms used in this specification do not limit the technical features described in this specification to a particular embodiment, but include various modifications, equivalents, or alternatives to the embodiment. In describing the drawings, like reference numerals have been used for like or related components. The singular nouns referring to an item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, each of the phrases "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may include any one of the items listed with that phrase within the phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish one element from another, and do not limit the element in any other respect (e.g., importance or order). When a (e.g., first) component is referred to as being "(functionally or communicatively) coupled" or "connected" to another (e.g., second) component, the component may be directly coupled to the other component or may be coupled through another component (e.g., third component).

[0178] As used herein, "adapted to" or "configured to" may be used interchangeably with, for example, hardware or software "suitable for," "capable of," "modified to," "adapted to," "capable of," or "designed to," depending on the context. In some circumstances, the phrase "a device configured to" can mean that the device is "capable of" in conjunction with other devices or components. For example, the sentence "a processor configured to perform A, B, and C" may refer to a processor that is dedicated to performing those operations (e.g., an embedded processor), or to a general-purpose processor (e.g., a CPU or AP) that can perform those operations by executing one or more programs stored in a memory device (e.g., a memory).

[0179] As used herein, the term "module" includes a unit made up of hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A "module" can be an integrally constructed part or the smallest unit or part thereof that performs one or more functions. "Modules" may be implemented mechanically or electronically and may include, for example, known or later developed application-specific integrated circuit (ASIC) chips, field-programmable gate arrays (FPGAs), or programmable logic devices that perform certain operations.

[0180] At least a portion of the apparatus (e.g., modules or functions thereof) or methods (e.g., operations) according to the various embodiments may be implemented as instructions stored in a computer-readable storage medium (e.g., memory) in the form of a program module. When an instruction is executed by a processor (e.g., a processor), the processor performs the function corresponding to the instruction. The computer-readable recording medium may include a hard disk, a floppy disk, a magnetic medium (e.g., magnetic tape), an optical recording medium (e.g., CD-ROM, DVD, magneto-optical medium (e.g., floptical disk), an internal memory, and the like. The instructions may include code produced by a compiler or code that can be executed by an interpreter.

[0181] Each of the components (e.g., modules or program modules) according to various embodiments may be composed of one or more entities, and some of the subcomponents described above may be omitted, or other subcomponents may be included. Alternatively, or in addition, some components (e.g., modules or program modules) may be integrated into a single entity and perform the same or similar functions as those performed by the respective components before being integrated. Operations performed by modules, program modules, or other components according to various embodiments may be performed sequentially, in parallel, iteratively, or heuristically, or at least some operations may be performed in other sequences, omitted, or other operations may be added. [Explanation of symbols]

[0182] 100 Electronic equipment 110 First Housing 111 Plate 1 112 1st Frame 119 1st rear cover 120 Second Housing 121 Second Plate 122 2nd frame 129 Second rear cover 130 Hinge housing 140 Display 141 First area 142 Second area 143 folding regions 151 1st circuit board 152 2nd circuit board 153 Battery No. 1 154 Second Battery 156 Camera Module 200 Hinge Structure 201 First Torque Structure 202 Second Torque Structure 210 First Rotating Structure 212 1st connection part 220 Second Rotating Structure 222 Second connection part 230 Fixed structures 233 First guide rail 234 Second guide rail 236 First fixing member 238 Second fixing member 240 First Arm 240S 1st arm axis 241 1st joint part 242 Second joint part 243 1st extension part 244 First Arm Cam (First Cam Structure) 245 Second Arm Cam (First Cam Structure) 246 First sliding pin 248 First guide pin 250 Second arm 250S 2nd arm axis 251 Third joint part 252 4th joint part 253 2nd extension part 254 Third Arm Cam (Second Cam Structure) 255 4th Arm Cam (2nd Cam Structure) 256 Second sliding pin 258 Third guide pin 259 4th guide pin 260 (1st) Link Structure 260a, 270a 1st part 260b, 270b 2nd part 260c, 270c center part 261 First guide groove 262 Second guide groove 263 First Opening 264 1st slope 270 (2nd) Link Structure 271 Third guide groove 272 4th guide groove 273 Second Opening 280 Center Bar 281 Inclined protrusion 281a Third slope 283 1st protruding part 291 First Cam (First Linear Cam) (First Cam Structure) 293 Third Cam (First Linear Cam) (First Cam Structure) 292 Second Cam (Second Linear Cam) (Second Cam Structure) 294 4th Cam (2nd Linear Cam) (2nd Cam Structure) 295a, 295b, 295c, 295d (third to sixth) elastic members 2491 First fixing ring 2591 Second fixing ring

Claims

1. An electronic device a first housing (110) and a second housing (120); a hinge structure (200) connected to the first housing (110) and the second housing (120) so that the first housing (110) rotates around a first rotation axis (R1) parallel to the axial direction, and the second housing (120) rotates around a second rotation axis (R2) parallel to the axial direction; a display (140) arranged to cover the first housing (110), the second housing (120), and the hinge structure (200); wherein the display (140) includes a folding region (143) that is flat in an unfolded state and curved in a folded state; The hinge structure (200) comprises: a first arm shaft (240S) extending in a direction parallel to the axial direction, rotatably connected to the fixed structure (230), and rotating in response to the rotation of the first rotating structure (210); a second arm shaft (250S) extending in a direction parallel to the axial direction, rotatably connected to the fixed structure (230), and rotating in response to the rotation of the second rotating structure (220); a link structure (260) coupled to each of the first arm shaft (240S) and the second arm shaft (250S); Here, the link structure (260) is configured to move linearly in the axial direction in response to rotation of the first arm shaft (240S) and the second arm shaft (250S), a center bar (280) that at least partially overlaps the folding area (143) of the display (140) when viewed from above; Here, the center bar (280) is connected to the link structure (260) and is configured to move in a direction perpendicular to the axial direction in response to linear movement of the link structure (260).

2. The first arm shaft (240S) includes a first guide pin (248) protruding from an outer surface thereof, The second arm shaft (250S) includes a third guide pin (258) protruding from its outer surface, The link structure (260) a first portion (260a) coupled to the first arm shaft (240S) and at least partially receiving the first guide pin (248); a second portion (260b) coupled to the second arm shaft (250S) and at least partially receiving the third guide pin (258); 2. The electronic device of claim 1, further comprising a central portion (260c) connecting the first portion (260a) and the second portion (260b).

3. The first guide groove 261 extends at a first length in an extension direction of the first arm shaft 240S and at a first angle in a circumferential direction of the first arm shaft 240S, The second guide groove 262 extends at a second length in the extension direction of the second arm shaft 250S and at a second angle in the circumferential direction of the second arm shaft 250S, the first length and the second length are substantially the same; 3. The electronic device of claim 2, wherein the first angle and the second angle are substantially equal in magnitude and opposite in direction.

4. In the unfolded state, a direction from the center bar (280) toward the folding region (143) and perpendicular to the axial direction is defined as a first direction (e.g., z-axis direction), the center bar (280) is configured to move in the first direction during an unfolding operation in which the hinge structure (200) moves from the folded state to the unfolded state; The electronic device of claim 1, wherein the center bar (280) is configured to move in a second direction (e.g., a −z-axis direction) opposite to the first direction during a folding operation in which the hinge structure (200) moves from the unfolded state to the folded state.

5. The link structure (260) includes a first portion (260a) coupled to the first arm shaft (240S), a second portion (260b) coupled to the second arm shaft (250S), and a central portion (260c) connecting the first portion (260a) and the second portion (260b), An opening (263) is formed in the central portion (260c) of the link structure (260), The side wall of the opening (263) includes a first inclined surface (264) having a predetermined inclination angle with respect to the axial direction, The center bar (280) includes an inclined protrusion (281) at least partially positioned within the opening (263); The inclined protrusion (281) includes a third inclined surface (281a) that at least partially contacts the first inclined surface (264), 5. The electronic device of claim 4, wherein as the link structure (260) moves linearly in the axial direction, the first inclined surface (264) presses against the third inclined surface (281a) so that the center bar (280) moves toward the first direction or the second direction.

6. The hinge structure (200) further includes the fixed structure (230) that supports the first arm shaft (240S) and the second arm shaft (250S), and a fixed member (238) that supports the first arm shaft (240S) and the second arm shaft (250S) and is disposed at a position spaced apart from the fixed structure (230) in the axial direction, The center bar (280) includes a protruding portion (283) at least a portion of which extends into a hole (2361) formed in the fixing member (236), and an elastic member (288) disposed on the protruding portion (283) and configured to provide an elastic force to the center bar (280), 5. The electronic device of claim 4, wherein the elastic member is configured to be compressed during the unfolding operation and tensioned during the folding operation.

7. The hinge structure (200) includes a second link structure (270) disposed at a position spaced apart from the link structure (260) in the axial direction and configured to move linearly in the axial direction; The second link structure (270) includes a third portion (270a) coupled to the first arm shaft (240S) and having a third guide groove (271) formed therein, in which a second guide pin (249) of the first arm shaft (240S) is at least partially received, a fourth portion (270b) coupled to the second arm shaft (250S) and having a fourth guide groove (272) formed therein, in which a fourth guide pin (259) of the second arm shaft (250S) is at least partially received, and a second central portion (270c) connecting the third portion (270a) and the fourth portion (270b), The second central portion (270c) has a second opening (273) formed therein, The side wall of the second opening (273) includes a second inclined surface (274) having a predetermined inclination angle with respect to the axial direction, the center bar (280) includes a second inclined protrusion (282) at least a portion of which is located within the second opening (273); 6. The electronic device of claim 5, wherein the second angled protrusion (282) includes a fourth angled surface (282a) that at least partially contacts the second angled surface (274).

8. The second link structure (270) Moves in the same direction as or opposite to the link structure (260), 8. The electronic device of claim 7, wherein the link structure (260) is configured to compress the center bar (280) in the same direction as the center bar (280).

9. The hinge structure (200) further includes the fixed structure (230) that supports the first arm shaft (240S) and the second arm shaft (250S), and a fixed member (238) that supports the first arm shaft (240S) and the second arm shaft (250S) and is disposed at a position spaced apart from the fixed structure (230) in the axial direction, The hinge structure (200) further includes a first arm portion (240) coupled to the first arm shaft (240S) so as to rotate together with the first arm shaft (240S), and a second arm portion (250) coupled to the second arm shaft (250S) so as to rotate together with the second arm shaft (250S), 2. The electronic device of claim 1, wherein the link structure is configured such that a first portion (260a) is positioned between the first arm portion (240) and the fixed structure (230), and a second portion (260b) is positioned between the second arm portion (250) and the fixed structure (230).

10. 10. The electronic device of claim 9, wherein in the deployed state, the link structure (260) is configured to at least partially contact one of the first arm portion (240) and the second arm portion (250) or the fixed structure (230).

11. The hinge structure (200) comprises: The arm shaft (240S) includes first cam structures (244, 245, 291, 293) coupled to the first arm shaft (240S), first elastic members (295a, 295b) compressed or stretched by the first cam structures (244, 245, 291, 293), second cam structures (254, 255, 292, 294) coupled to the second arm shaft (250S), and second elastic members (295c, 295d) compressed or stretched by the second cam structures (254, 255, 292, 294), The first cam structures (244, 245, 291, 293) include first arm cams (244, 245) formed on the first arm portion (240) and rotating together with the first arm portion (240), and first linear cams (291, 293) linearly movably coupled to the first arm shaft (240S) and meshing with the first arm cams (244, 245), 10. The electronic device of claim 9, wherein the second cam structure (254, 255, 292, 294) includes a second arm cam (254, 255) formed on the second arm portion (250) and rotating together with the second arm portion (250), and a second linear cam (292, 294) linearly movably coupled to the second arm shaft (250S) and engaging with the second arm cam (254, 255).

12. The hinge structure is the fixed structure (230); the first rotating structure (210) coupled to the first guide rail (233) of the fixed structure (230) so as to be rotatable about the first rotation axis (R1); a first arm portion (240) coupled to the first arm shaft (240S) so as to rotate around the first arm shaft (240S) and slidably connected to the first rotating structure (210); the second rotating structure (220) coupled to the second guide rail (234) of the fixed structure (230) so as to be rotatable about the second rotation axis (R2); a second arm portion (250) coupled to the second arm shaft (250S) so as to rotate around the second arm shaft (250S) and slidably connected to the second rotating structure (220), Here, the first arm shaft 240S extends in a direction parallel to the first rotation shaft R1, is rotatably connected to the fixed structure 230, and includes a first guide pin 248 protruding from an outer surface thereof; The second arm shaft (250S) extends in a direction parallel to the second rotation shaft (R2), is rotatably connected to the fixed structure (230), and includes a third guide pin (258) protruding from an outer surface thereof; 2. The electronic device of claim 1, wherein the link structure (260) includes a first portion (260a) through which the first arm shaft (240S) passes and in which a first guide groove (261) is formed and in which the first guide pin (248) is at least partially accommodated, a second portion (260b) through which the second arm shaft (250S) passes and in which a second guide groove (262) is formed and in which the third guide pin (258) is at least partially accommodated, and a central portion (260c) connecting the first portion (260a) and the second portion (260b).

13. 13. The electronic device of claim 12, wherein the link structure (260) is configured to link the first arm shaft (240S) and the second arm shaft (250S) so that the first arm shaft (240S) and the second arm shaft (250S) rotate in opposite directions at the same angle.

14. The electronic device according to claim 12, wherein each of the first guide groove (261) and the second guide groove (262) is provided in a spiral shape.

15. 13. The electronic device of claim 12, wherein when the first arm shaft (240S) rotates in a first rotational direction and the second arm shaft (250S) rotates in a second rotational direction opposite to the first rotational direction, the first guide pin (248) and the third guide pin (258) are configured to press the link structure in the same direction.

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