Hinge structure and foldable electronic device comprising same

Abstract

The present disclosure discloses a foldable electronic device comprising a hinge structure coupled to a first housing and a second housing, wherein at least one of the hinge structures comprises a friction structure disposed between a first arm member and a second arm member, the friction structure comprising: a first friction member including a first curved surface corresponding to a first outer circumferential surface of the first arm member; a second friction member including a second curved surface corresponding to a second outer circumferential surface of the second arm member; and a support member disposed between the first friction member and the second friction member, and configured to press the first friction member in a first direction toward the first arm member while pressing the second friction member in a second direction toward the second arm member, such that the first curved surface of the first friction member forms frictional contact with the first outer circumferential surface of the first arm member during at least a partial rotation range of the first arm member, and the second curved surface of the second friction member forms frictional contact with the second outer circumferential surface of the second arm member during at least a partial rotation range of the second arm member.

Description

Hinge structure and foldable electronic device including the same

[0001] Various embodiments of the present document relate to a foldable electronic device including a hinge structure.

[0002] Portable electronic devices, such as smartphones, can support calling and various content search functions based on various applications. Portable electronic devices can display screens corresponding to each function while providing these various functions. Users may desire a wider screen when utilizing these various functions. In typical portable electronic devices, expanding the display for screen display requires increasing the overall size of the device, which can reduce portability. Accordingly, foldable portable electronic devices with foldable displays have been developed to increase screen size while maintaining portability. These foldable portable electronic devices can be configured in both folded and unfolded states.

[0003] A foldable electronic device having a hinge structure may include a plurality of housings capable of supporting respective areas of a display in an unfolded state, and a hinge structure connecting the plurality of housings to each other. The hinge structure may connect the plurality of housings while the plurality of housings are in a folded or unfolded state, and may support the housings to be held at a specific angle.

[0004] The above information may be provided as background information to aid in understanding this document. None of the above is claimed to be prior art related to this document or can be used to determine prior art.

[0005] According to various embodiments of the present disclosure, a foldable electronic device (or a portable electronic device, a portable communication device, a foldable electronic device, or a foldable electronic device having a communication function) may include a display (230); a first housing (210) and a second housing (220) in which at least a portion of the display is disposed; and a hinge structure (240, 240-1) coupled to the first housing and the second housing. At least one of the hinge structures (240, 240-1) may include: a first rotating member (510) that rotates in accordance with the rotation of the first housing; a second rotating member (520) that rotates in accordance with the rotation of the second housing; a first arm member (410) that rotates in accordance with the rotation of the first rotating member (510); a second arm member (420) that rotates in accordance with the rotation of the second rotating member (520); a first shaft (131) coupled to the first arm member (410); It may include a second shaft (132) connected to the second arm member (420); a third shaft (133) and a fourth shaft (134) disposed between the first shaft (131) and the second shaft (132); a first elastic structure (110) including a first elastic member (111) disposed on the first shaft (131), a second elastic member (112) disposed on the second shaft (132), a third elastic member (113) disposed on the third shaft (133), and a fourth elastic member (114) disposed on the fourth shaft (134); and a friction structure (801) disposed between the first arm member (410) and the second arm member (420).According to one embodiment, the friction structure (801) includes: a first friction member (700) disposed between the first elastic member (111) and the first arm member (410) and including a first curved surface (751) corresponding to a first outer peripheral surface (435) of the first arm member (410); a second friction member (800) disposed between the second elastic member (112) and the second arm member (420) and including a second curved surface (851) corresponding to a second outer peripheral surface (1435) of the second arm member (420); And a support configured to be disposed between the first friction member (700) and the second friction member (800), and to press the first friction member (700) in a first direction toward the first arm member (410) based on the elastic force from the third elastic member (113) and the fourth elastic member (114), and to press the second friction member (800) in a second direction toward the second arm member (420), so that during at least a partial rotation range of the first arm member (410), the first curved surface (751) of the first friction member (700) forms frictional contact with the first outer peripheral surface (435) of the first arm member (410), and during at least a partial rotation range of the second arm member (420), the second curved surface (851) of the second friction member (800) forms frictional contact with the second outer peripheral surface (1435) of the second arm member (420). Absence (900) may be included.

[0006] According to one embodiment of the present disclosure, a hinge structure may include: a first rotation member (510) that rotates about a first axis; a first arm member (410) that rotates according to the rotation of the first rotation member; a second rotation member (520) that rotates about a second axis; a second arm member (420) that rotates according to the rotation of the second rotation member; a first shaft (131) that is connected to the first arm member; a second shaft (132) that is connected to the second arm member; a third shaft (133) that is arranged between the first shaft and the second shaft; a fourth shaft (134) that is arranged between the third shaft and the second shaft; a first elastic structure (110) including a plurality of elastic members that are arranged on each of the first shaft, the second shaft, the third shaft, and the fourth shaft; and a friction structure (801) that is arranged between the first arm member and the second arm member. The friction structure (801) may include a first friction member (700) disposed between the first elastic structure and the first arm member and including a first curved surface (751) that contacts a first outer circumferential surface (435) of the first arm member; a second friction member (800) disposed between the first elastic structure and the second arm member and including a second curved surface (851) that contacts a second outer circumferential surface (1435) of the second arm member; and a support member (900) disposed between the first friction member and the second friction member and configured to press the first friction member and the second friction member.

[0007] The above and other embodiments, advantages and technical features of the present disclosure will become clearer by describing the embodiments in more detail with reference to the accompanying drawings.

[0008] FIG. 1A is a perspective view of a front side of an electronic device according to one embodiment. FIG. 1B is a plan view of a rear side of an electronic device according to one embodiment.

[0009] FIG. 2 is an exploded perspective view of a portion of the electronic device of FIGS. 1A and 1B including a hinge structure according to various embodiments of the present disclosure.

[0010] FIG. 3 is a perspective view showing an example of a first type hinge structure of a foldable electronic device according to one embodiment.

[0011] FIG. 4 is a plan view illustrating an example of a first type hinge structure of a foldable electronic device according to one embodiment.

[0012] FIG. 5 is an exploded perspective view showing an example of a first type hinge structure according to one embodiment.

[0013] FIG. 6a is a drawing showing an example of a first arm member according to one embodiment, FIG. 6b is a drawing showing an example of a linkage gear according to one embodiment, FIG. 6c is a drawing showing an example of a cam member according to one embodiment, FIG. 6d is a drawing showing an example of a state of an arm member and a cam member in an unfolded state of a foldable electronic device according to one embodiment, and FIG. 6e is a drawing showing an example of a state of an arm member and a cam member in an unfolded state of a foldable electronic device according to one embodiment.

[0014] FIG. 7 is a drawing showing a portion of a hinge structure including a friction structure according to one embodiment.

[0015] FIG. 8 is a drawing showing a first friction member included in a friction structure according to one embodiment.

[0016] FIG. 9 is a drawing showing a support member included in a friction structure according to one embodiment.

[0017] FIG. 10 is a perspective view illustrating a coupling relationship between a friction structure and a first arm member of a hinge structure according to one embodiment.

[0018] FIG. 11 is a plan view illustrating an example of a hinge structure including a friction structure according to one embodiment.

[0019] FIG. 12 is a drawing showing an example of a force transmission state of a first friction member and a second friction member according to one embodiment.

[0020] Fig. 13 is a drawing showing an example of a force transmission state of a support member according to one embodiment.

[0021] FIG. 14 is a drawing showing an example of a state of a hinge structure in an unfolded state of a foldable electronic device according to one embodiment.

[0022] FIG. 15 is a drawing showing an example of a state of a friction structure and a cam member in an unfolded state of a foldable electronic device according to one embodiment.

[0023] FIG. 16 is a drawing showing an example of a state of a hinge structure in an intermediate state of a first angle of a foldable electronic device according to one embodiment.

[0024] FIG. 17 is a drawing showing an example of a state of a friction structure and a cam member in an intermediate state of a first angle of a foldable electronic device according to one embodiment.

[0025] FIG. 18 is a drawing showing an example of a state of a hinge structure in a folded state of a foldable electronic device according to one embodiment.

[0026] FIG. 19 is a drawing showing an example of a state of a friction structure and a cam member in a folded state of a foldable electronic device according to one embodiment.

[0027] FIG. 20 is a drawing showing a part of a second type of hinge structure according to one embodiment.

[0028] FIG. 21 is a drawing showing a part of a third type of hinge structure according to one embodiment.

[0029] FIG. 22 is a drawing showing in detail the friction structure of a third type of hinge structure according to one embodiment.

[0030] FIGS. 23a and 23b are drawings showing a portion of a fourth type of hinge structure according to one embodiment.

[0031] FIG. 24 is a drawing showing a friction member included in a friction structure of a fourth type of hinge structure according to one embodiment.

[0032] FIG. 25 is a drawing showing a support member included in a friction structure according to one embodiment.

[0033] FIG. 26 is a drawing showing a part of a fifth type hinge structure according to one embodiment.

[0034] FIG. 27 is a drawing showing a female member and a linkage member of a hinge structure according to one embodiment.

[0035] FIGS. 28a, 28b and 28c are drawings for explaining the sliding movement of the linkage member according to one embodiment.

[0036] FIG. 29 is a drawing showing a rotation member and a spiral rotation member included in a hinge structure according to one embodiment.

[0037] FIG. 30 is a drawing showing a part of a sixth type of hinge structure according to one embodiment.

[0038] FIG. 31 is a drawing showing a part of a seventh type hinge structure according to one embodiment.

[0039] FIG. 32 is a drawing showing a female member included in a seventh type of hinge structure according to one embodiment.

[0040] FIG. 33 is a drawing showing the arrangement of the arm member and the friction member in the unfolded state of the seventh type of hinge structure according to one embodiment.

[0041] FIG. 34 is a drawing showing the arrangement of the arm member and the friction member in an intermediate state of the seventh type of hinge structure according to one embodiment.

[0042] FIG. 35 is a drawing showing the arrangement of the arm member and the friction member in the folded state of the seventh type of hinge structure according to one embodiment.

[0043] FIG. 36 is a drawing showing a part of a hinge structure of type 8 according to one embodiment.

[0044] FIG. 37 is a drawing showing a part of a female member included in a hinge structure of the eighth type according to one embodiment.

[0045] FIG. 38 is a drawing showing a friction structure included in a hinge structure of type 8 according to one embodiment.

[0046] FIG. 39a is a drawing showing an unfolded state of an electronic device according to one embodiment, and FIG. 39b is a drawing showing a folded state of an electronic device according to one embodiment.

[0047] FIG. 40 is an exploded perspective view of at least a portion of an electronic device including a hinge according to one embodiment.

[0048] FIG. 41 is a drawing showing a plurality of housings having hinges arranged (e.g., mounted) according to one embodiment.

[0049] FIG. 42 is a drawing showing a hinge structure included in a first hinge and a hinge structure included in a second hinge according to one embodiment.

[0050] Hereinafter, various embodiments of this document are described with reference to the attached drawings.

[0051] The various embodiments of the present document can provide a foldable electronic device that can achieve slimness by reducing the thickness of a hinge structure.

[0052] A foldable electronic device according to one embodiment may include a portable electronic device such as a smartphone, tablet, notebook, slate PC, or laptop, and may support calling functions and various content providing functions based on various types of applications.

[0053] In one embodiment, a foldable electronic device can secure the frictional force required to maintain an angle in a flex motion through cylindrical frictional force and rotational frictional force even when the size of the cam member is reduced in the process of implementing a slim foldable electronic device and the frictional force due to the cam motion is reduced.

[0054] In addition, various purposes and effects provided by the foldable electronic device including the improved hinge structure according to various embodiments may be mentioned according to the embodiments of the detailed description.

[0055] FIG. 1A is a perspective view of a front side of an electronic device according to one embodiment. FIG. 1B is a plan view of a rear side of an electronic device according to one embodiment.

[0056] Referring to FIGS. 1A and 1B, the electronic device (200) may include a first housing (210) (e.g., a first housing structure) including a first side member (213) (e.g., a side bezel) and a second housing (220) (e.g., a second housing structure) including a second side member (223) (e.g., a side bezel) that are foldably coupled to each other with respect to a folding axis (F) through at least one hinge structure (240, 240-1) (e.g., a hinge module or a hinge device). For example, the first housing (210) and the second housing (220) may be configured as a foldable housing (e.g., a housing structure). For example, the electronic device (200) may include a first display (230) (e.g., a flexible display, a foldable display, or a main display) arranged to be supported by a first housing (210) and a second housing (220). For example, the first housing (210) may include a first side (211) and a second side (212) facing in an opposite direction (e.g., a -z-axis direction) of the first side (211). For example, the second housing (220) may include a third side (221) and a fourth side (222) facing in an opposite direction (e.g., a -z-axis direction) of the third side (221). For example, the first housing (210) may include a first rear cover (214) coupled with a first side member (213). For example, the second housing (220) may include a second rear cover (224) coupled with a second side member (223). For example, when the electronic device (200) is in a fully unfolded first state (e.g., an unfolded state or an unfolded state), the first side (211) and the third side (221) may be operated so that they face substantially the same direction (e.g., a z-axis direction). For example, when the electronic device (200) is in a fully folded second state (e.g., a folded state or a folded state), the first side (211) and the third side (221) may face each other or face opposite directions.For example, the electronic device (200) may be operated to maintain a third state (e.g., an intermediate state) between the first state and the second state.

[0057] According to one embodiment, the electronic device (200) may include a first receiver (201), at least one first sensor module (204) (e.g., an ambient light sensor) and / or at least one first camera module (205) (e.g., a UDC, under display camera) disposed on a first side (211) of the first housing (210). For example, the electronic device (200) may include at least one key (206) disposed on a first side member (213). For example, the electronic device (200) may include at least one second camera module (208) and / or a flash (209) disposed on a second side (212) of the first housing (210) (e.g., a first rear cover (214)). For example, the electronic device (200) may include a second display (231) disposed on a fourth side (222) of a second housing (220), at least one third camera module (225) (e.g., UDC, under display camera), at least one second sensor module (226), and / or a second receiver (227). For example, the second display (231) may be disposed to be visible from the outside through at least a portion of the second rear cover (224). For example, the electronic device (200) may include a speaker (202) disposed on a second side member (223), a microphone (203) disposed on a first side member (213), and / or a connector port (207). At least some of the aforementioned components may be disposed in the first housing (210) and / or the second housing (220).

[0058] According to one embodiment, the first display (230) (e.g., a flexible display) may include a first region (230a) (e.g., a first planar portion) corresponding to at least a portion of the first surface (211), a second region (230b) (e.g., a second planar portion) corresponding to at least a portion of the third surface (221), and a third region (230c) (e.g., a flexible portion) connecting the first region (230a) and the second region (230b) and allowing the electronic device (200) to be deformed in a second state (e.g., a folded state) and / or a third state. For example, the third region (230c) may be positioned at a position at least partially overlapping at least one hinge structure (240, 240-1) when the first display (230) is viewed from above (e.g., in the z-axis direction). For example, the first display (230) may be arranged so that it is not visible from the outside in the second state by having the first side (211) and the third side (221) face each other (e.g., inward-fold type). For example, the first display (230) may be arranged so that it is visible from the outside in the second state by having the first side (211) and the third side (221) face each other in opposite directions (e.g., outward-fold type).

[0059] FIG. 2 is an exploded perspective view of a portion of the electronic device of FIGS. 1A and 1B including a hinge structure according to various embodiments of the present disclosure.

[0060] Referring to FIG. 2, the electronic device (200) may include at least one hinge structure (240, 240-1) (e.g., a hinge module or a hinge device) connecting the first housing (210) and the second housing (220) under the first display (230) (e.g., in the -z-axis direction). For example, the at least one hinge structure (240, 240-1) may include a first hinge structure (240) and a second hinge structure (240-1) spaced apart from the first hinge structure (240) along a direction parallel to the folding axis (F) (e.g., in the ±y-axis direction). For example, at least one hinge structure (240, 240-1) may be positioned between the first housing (210) and the second housing (220) so as to be invisible from the outside through a hinge housing (250) (e.g., a hinge cover).

[0061] When the electronic device (200) is in a folded state, the folding area (or folding area) of the first display (230) can be formed into a water drop shape (or dumbbell shape) due to gravity, thereby securing a folding R (curvature) that prevents cracks or buckling from occurring in the folding area of ​​the first display (230). In addition, by arranging the dumbbell-shaped display folding area within a certain space of the housings (210, 220), the gap between the housings (210, 220) that are arranged to face each other and have an 11-shaped arrangement state when the electronic device (200) is in a folded state can be reduced. Through this, the electronic device (200) can reduce the overall size of the electronic device (200) by reducing the gap between the housings (210, 220) in the folded state, and can block or reduce the inflow of foreign substances between the housings (210, 220).

[0062] According to one embodiment, the electronic device may include at least one center bar (243) disposed between the first display (230) and the hinge structure (240, 240-1). The center bar (243) may be disposed to cover at least a portion of a central area of ​​at least one of the first hinge structure (240) and the second hinge structure (240-1). As an example, the center bar (243) may be disposed to cover at least a portion of a central area of ​​each of the first hinge structure (240) and the second hinge structure (240-1). The center bar (243) may be fastened and fixed to the hinge housing (250) and at least one of the hinge structures (240, 240-1).

[0063] The wing plates (261, 262) are arranged to be combined with at least one hinge structure (240, 240-1) and cover at least a portion of a surface of at least one hinge structure (240, 240-1) in the z-axis direction when the electronic device (200) is in an unfolded state. The wing plates (261, 262) are provided in a form separate from the housings (210, 220). Accordingly, a gap may be formed between the wing plates (261, 262) and the housings (210, 220). The wing plates (261, 262) may be arranged on both sides with the center bar (243) therebetween. For example, the first wing plate (261) may be positioned in the x-axis direction with respect to the center bar (243), and the second wing plate (262) may be positioned in the -x-axis direction with respect to the center bar (243). When the wing plates (261, 262) are coupled to the hinge structure (240, 240-1), they can be arranged at the same height as the center bar (243) or on the same xy plane based on the z-axis. The wing plates (261, 262) can rotate clockwise or counterclockwise according to the hinge operation of at least one hinge structure (240, 240-1). For example, while the first wing plate (261) rotates counterclockwise, the second wing plate (262) can rotate clockwise, and while the first wing plate (261) rotates clockwise, the second wing plate (262) can rotate counterclockwise. The first wing plate (261) can support a flat first surface of the third region (230c) of the display (230) that folds into a dumbbell shape (or a water drop shape with gravity applied), and the second wing plate (262) can support a flat second surface (a surface symmetrical to the first surface with respect to the z-axis) of the third region (230c) of the display (230) that folds into a dumbbell shape.

[0064] FIG. 3 is a perspective view showing an example of a first type hinge structure of a foldable electronic device according to an embodiment, FIG. 4 is a plan view showing an example of a first type hinge structure of a foldable electronic device according to an embodiment, and FIG. 5 is an exploded perspective view showing an example of a first type hinge structure according to an embodiment. In FIGS. 3, 4, and 5, the first hinge structure (240) among the first type hinge structures (240, 240-1) will be described as an example. The configuration of the first hinge structure (240) described in FIGS. 3, 4, and 5 may have the same or similar structure and configuration as the second hinge structure (240-1) described above.

[0065] Referring to FIGS. 1 to 5, the first hinge structure (240) (hereinafter also referred to as a first type hinge structure) may include a fixed bracket (530) (or a center bracket), a first rotation member (510) (or a first rotation structure, a first rotation body), a second rotation member (520) (or a second rotation structure, a second rotation body), a first link member (310) (or a first slide link, a first rotation support structure, a first arm link member), a second link member (320) (or a second slide link, a second rotation support structure, a first rotation link member), a first arm member (410) (or a first arm structure, a first arm), and a second arm member (420) (or a second arm structure, a second arm).

[0066] According to one embodiment, at least one of the components included in the first hinge structure (240) may be omitted. For example, when the first rotation member (510) and the second rotation member (520) are directly coupled to the housings (210, 220), and the arm members (410, 420) are coupled to the rotation members (510, 520) and rotate in response to the rotation of the rotation members (510, 520), the first link member (310) and the second link member (320) may be omitted.

[0067] The first hinge structure (240) may include a plurality of shafts (131, 132, 133, 134), a cam member (560, 570) (or a cam structure), a first main gear (171), a second main gear (172), at least one linkage gear (173), a shaft fixing member (270) (or a shaft bracket), at least one cam member (560, 570), a first elastic structure (110) (or an elastic assembly, an elastic combination, an elastic assembly, an elastic unit), a second elastic structure (120), and a plurality of coupling members (290) (or fixing clips, e-rings).

[0068] At least some of the components of the first hinge structure (240) described above may be provided (or, included, configured) with at least some metal material to have a specified rigidity. Alternatively, if necessary, the first hinge structure (240) may have a material of reinforced plastic or resin. According to one embodiment, at least some of the first hinge structure (240) described above may be omitted or modified. In one embodiment, washers may be provided to correspond to a plurality of shafts (131, 132, 133, 134). For example, at least some of the washers (249) may be omitted. Alternatively, a specific structure or configuration may be integrated or combined with another structure or configuration. According to one embodiment, a first hinge structure (240) may include a friction structure (801) (or, a first friction structure, a friction member, a force transmission member, a torque providing member) that rotates with the female member and cylindrically rubs with the female member.

[0069] The fixed bracket (530) may include a bracket body (533), a first rail (531) (or a first fixed rail), and a second rail (532) (or a second fixed rail). Grooves may be formed on one side (e.g., a side wall facing the -y-axis direction) of the bracket body (533), in which one edge (e.g., a +y-axis edge) of at least one of the first shaft (or the first outer shaft) (131), the second shaft (132) (or the second outer shaft), the third shaft (133) (or the first inner shaft), and the fourth shaft (or the second inner shaft) (134) may be received (or arranged). Grooves may be formed on one side (e.g., a side wall facing the y-axis direction) of the bracket body (533), in which at least one linkage gear (173) may be received (or arranged).

[0070] The fixed bracket (530) may be at least partially secured and fixed to one side of the hinge housing (250). For example, the fixed bracket (530) may be fixed to the -y-axis edge or the y-axis edge of the hinge housing (250). The fixed bracket (530) may include a structure (e.g., a first rail (531)) and a second rail (532)) to which a part of the first rotation member (510) (e.g., a first rail structure (511)) and a part of the second rotation member (520) (e.g., a third rail structure (521)) may be rotatably fastened.

[0071] The first rail (531) of the fixed bracket (530) may be formed with a structure corresponding to the first rail structure (511) of the first rotation member (510), and the second rail (532) may be formed with a structure corresponding to the third rail structure (521) of the second rotation member (520). For example, the first rail (531) and / or the second rail (532) may include at least a portion of a cross-section that has an arc shape or a crescent shape in the direction from the upper surface (e.g., the surface facing the +z-axis) to the lower surface (e.g., the surface facing the -z-axis) of the fixed bracket (530).

[0072] The first rail (531) of the fixed bracket (530) may be arranged to be offset in the -x-axis direction from the second rail (532) with respect to the first axis (101) and the second axis (102), and the second rail (532) may be arranged to be offset in the +x-axis direction from the first rail (531) with respect to the first axis (101) and the second axis (102).

[0073] According to one embodiment, the first axis (101) and the second axis (102) may be formed to be spaced apart by a specified interval. According to one embodiment, the interval between the first axis (101) and the second axis (102) may be formed smaller than the interval between the first shaft (131) and the second shaft (132). According to one embodiment, the first axis (101) and the second axis (102) may be formed above the first shaft (131) and the second shaft (132) based on the z-axis. Alternatively, the first axis (101) and the second axis (102) may be formed closer to the display (230) than the first shaft (131) and the second shaft (132) based on the z-axis.

[0074] The first rotating member (510) may include a first rotating body (513), a first rail structure (511) extending from one end of the first rotating body (513) (e.g., an end in the x-axis direction), and a second rail structure (512) extending from the other end of the first rotating body (513) (e.g., an end in the -x-axis direction). The first rotating body (513) may be disposed between the first rail structure (511) and the second rail structure (512) in the form of a rail. At least a portion of the first rotating body (513) may be fastened to the other end of the fixed bracket (530). The first rail structure (511) and the second rail structure (512) may be formed in steps with the first rotating body (513) as the center.

[0075] The first rail structure (511) of the first rotation member (510) can be fastened to one side of the fixed bracket (530) (e.g., the first rail (531)) so as to enable a hinge movement. The second rail structure (512) of the first rotation member (510) can be coupled to one side of the first link member (310) to perform a sliding movement (or a rotation movement, or an arc movement) in response to the hinge movement (or a rotation movement, or a sliding movement) of the first rail structure (511). A first rotation pin (301) can be inserted into a first pin opening (515) formed in the second rail structure (512) of the first rotation member (510). The second rail structure (512) of the first rotation member (510) can be coupled to a third rail (311) of the first link member (310) via the first rotation pin (301). While the first link member (310) coupled to the first housing (210) moves in accordance with the movement of the first housing (210), the first rail structure (511) of the first rotational member (510) connected to the fixed bracket (530) can rotate in place based on the first axis (101). For example, the second rail structure (512) of the first rotational member (510) can rotate (or slide) within the first link member (310) while moving in one direction (e.g., counterclockwise while the foldable electronic device (200) is folded from an unfolded state or clockwise while the foldable electronic device (200) is unfolded from a folded state). At least a portion of the first wing plate (261) among the wing plates (261, 262) can be fixed to the first rotational member (510). In this regard, the first rotating body (513) may include at least one hole or groove used for coupling with the first wing plate (261).

[0076] According to one embodiment, the second rotating member (520) may include a second rotating body (523), a third rail structure (521) extending to the other end of the second rotating body (523) (e.g., the end in the -x-axis direction), and a fourth rail structure (522) extending to one end of the second rotating body (523) (e.g., the end in the +x-axis direction). The second rotating body (523) may be disposed between the third rail structure (521) and the fourth rail structure (522) in the form of a rail. At least a portion of the second rotating body (523) may be fastened to one side of the fixed bracket (530). The third rail structure (521) and the fourth rail structure (522) may be formed to be stepped about the second rotating body (523).

[0077] The third rail structure (521) may be fastened to the other side of the fixed bracket (530) (e.g., the second rail (532)) so as to enable hinge movement. The third rail structure (521) may rotate in place about the second axis (102) while the second link member (320) coupled to the second housing (220) moves according to the movement of the second housing (220). According to one embodiment, the third rail structure (521) may include a rail structure similar or identical to the first rail structure (511).

[0078] The fourth rail structure (522) may be coupled to the second link member (320). A second rotation pin (302) may be inserted into a second pin opening (525) formed in the fourth rail structure (522). The fourth rail structure (522) of the second rotation member (520) may be coupled to the fourth rail (321) of the second link member (320) through the second rotation pin (302). The fourth rail structure (522) may rotate (or slide) within the second link member (320) while moving in one direction (e.g., counterclockwise while the foldable electronic device (200) is folded from an unfolded state or clockwise while the foldable electronic device (200) is unfolded from a folded state). In this regard, the second link member (320) may include rail wings having a hollow space formed in the center and curved surfaces disposed on both sides, similar to the first link member (310). According to one embodiment, the fourth rail structure (522) may include a rail structure similar or identical to the second rail structure (512).

[0079] The second rotation member (520) can move in the opposite direction to the first rotation member (510). For example, while the first rail structure (511) of the first rotation member (510) rotates in place in a counterclockwise direction, the third rail structure (521) of the second rotation member (520) can rotate in place in a clockwise direction.

[0080] While the foldable electronic device (200) is being folded, the first rail structure (511) of the first rotational member (510) rotates counterclockwise, and the first link member (310) inserted into the second rail structure (512) can slide clockwise along the second rail structure (512). The sliding motion is relative, so the first link member (310) can slide clockwise with respect to the second rail structure (512). While the foldable electronic device (200) is being folded, the third rail structure (521) of the second rotational member (520) rotates clockwise along the second rail (532) of the fixed bracket (530), and the second link member (320) inserted into the fourth rail structure (522) can slide counterclockwise. The second link member (320) can slide clockwise with respect to the fourth rail structure (522).

[0081] According to one embodiment, the first link member (310) may include a structure that is coupled and fixed to one side of the first housing (210). The first link member (310) may include a third rail (311) on which a part of the first rotation member (510) (e.g., the second rail structure (512)) is mounted. The first link member (310) may include a first slide mounting portion (312) on which a first slide portion (413) of the first arm member (410) is mounted. The first link member (310) may be formed such that the y-axis direction is longer than the x-axis direction to accommodate the third rail (311) and the first slide mounting portion (312). The first link body (313) of the first link member (310) may be fixed to the first housing (210). The third rail (311) may be arranged in one direction (e.g., -y-axis direction) of the first link body (313). The first slide mounting portion (312) may be arranged in the other direction (e.g., +y-axis direction) of the first link body (313). The first slide portion (413) of the first arm member (410) may be mounted on the first slide mounting portion (312) to guide the sliding motion of the first slide portion (413).

[0082] According to one embodiment, the second link member (320) may include a structure that is coupled and fixed to one side of the second housing (220). The second link member (320) may include a fourth rail (321) on which a portion of the second rotation member (520) (e.g., the fourth rail structure (522)) is mounted. The second link member (320) may include a second slide mounting portion (322) on which a second slide portion (423) of the second arm member (420) is mounted. The second link member (320) may be formed such that the y-axis direction is longer than the x-axis direction to accommodate the fourth rail (321) and the second slide mounting portion (322). The second link body (323) of the second link member (320) may be fixed to the second housing (220). The fourth rail (321) may be arranged in one direction (e.g., -y-axis direction) of the second link body (323). The second slide mounting portion (322) may be arranged in the other direction (e.g., +y-axis direction) of the second link body (323). The second slide portion (423) of the second arm member (420) may be mounted on the second slide mounting portion (322) to guide the sliding motion of the second slide portion (423).

[0083] According to one embodiment, the first arm member (410) may be arranged symmetrically with the second arm member (420) with respect to the +y-axis or the -y-axis. The first arm member (410) may rotate from the z-axis to the -x-axis direction or from the -x-axis direction to the z-axis direction. The first arm member (410) may include a first arm body (414), a first slide portion (413), a first arm portion (411), and a second arm portion (412). The first arm body (414) may be arranged between the first arm portion (411) and the second arm portion (412). The first arm portion (411) may be formed to extend from the first arm body (414) in the x-axis direction, and may include a first arm hole (441) through which the first shaft (131) may pass. A cam structure that performs a cam operation by coming into contact with one side of a second cam member (570) (e.g., a cam portion arranged in the -y-axis direction) may be provided in the peripheral structure forming the first arm hole (441). The cam structure of the first arm portion (411) may be formed on a surface facing the cam member (500) (e.g., a surface of the first arm portion (411) in the +y-axis direction, or a center direction of the hinge housing (250). The second arm portion (412) may be formed to extend from the first arm body (414) in the x-axis direction and may be arranged to be spaced apart from the first arm portion (411). The second arm portion (412) may include a through hole through which the first shaft (131) may pass. The through hole included in the second arm portion (412) and the through hole included in the first arm portion (411) may be connected to each other. A cam structure that performs a cam operation by coming into contact with one side of the first cam member (560) (e.g., a cam member positioned in the -y-axis direction) may be provided in the peripheral structure forming the through hole of the second arm portion (412). The cam structure of the second arm portion (412) may be formed on a surface facing the second cam member (570) (e.g., a surface in the +y-axis direction of the second arm portion (412), or in the center direction of the hinge housing (250).The first slide portion (413) may be formed to extend in the -x-axis direction from the first arm body (414). The first slide portion (413) may be fastened to the first link member (310) and may perform a sliding operation along the rail wings formed in the first slide mounting portion (312) while the foldable electronic device (200) performs a hinge operation. The first slide portion (413) may include rail grooves that may be fastened to the rail wings formed in the first slide mounting portion (312) of the first link member (310).

[0084] According to one embodiment, the second arm member (420) may be arranged symmetrically with respect to the first arm member (410) with respect to the +y-axis or the -y-axis. The second arm member (420) may rotate from the z-axis to the x-axis direction or from the x-axis direction to the z-axis direction. The second arm member (420) may rotate in a direction opposite to the direction of movement of the first arm member (410). The second arm member (420) may include a second arm body (424), a third arm portion (421), a fourth arm portion (422), and a second slide portion (423). The second arm body (424) may be arranged between the third arm portion (421) and the fourth arm portion (422). The fourth arm portion (422) may be formed to extend from the second arm body (424) in the -x-axis direction, and may include a through hole through which the second shaft (132) may pass. A cam structure that performs a cam operation by coming into contact with one side of the second cam member (570) (e.g., a cam portion arranged in the -y-axis direction) may be provided in the peripheral structure forming the through hole. The cam structure of the third arm portion (421) may be formed on a surface facing the second cam member (570) (e.g., a surface of the third arm portion (421) in the +y-axis direction, or a center direction of the hinge housing (250). The fourth arm portion (422) may be formed to extend from the second arm body (424) in the -x-axis direction and may be arranged to be spaced apart from the third arm portion (421). The fourth arm portion (422) may include a through hole through which the second shaft (132) may pass. The through hole included in the fourth arm portion (422) and the through hole included in the third arm portion (421) may be connected to each other. A cam structure that performs a cam operation by coming into contact with one side of the first cam member (560) (e.g., a cam part arranged in the -y-axis direction) may be provided in the peripheral structure forming the through hole of the fourth arm portion (422).The cam structure of the fourth arm portion (422) may be formed on a surface facing the first cam member (560) (e.g., a surface in the +y-axis direction of the fourth arm portion (422), or a center direction of the hinge housing (250). The second slide portion (423) may be formed to extend from the second arm body (424) in the -x-axis direction. The second slide portion (423) may be fastened to the second link member (320) to perform a sliding motion along the rail wings formed in the second slide mounting portion (322) while the foldable electronic device (200) performs a hinge motion. The second slide portion (423) may include rail grooves that may be fastened to the rail wings formed in the second slide mounting portion (322) of the second link member (320).

[0085] According to one embodiment, the first shaft (131) may have a rod shape in which the length in the y-axis or -y-axis direction is longer than the length in the x-axis or z-axis direction. The first shaft (131) may be formed of (or, include, be formed of) a metal material so as to support inserted components. For example, the first arm portion (411) of the first arm member (410), the second arm portion (412), the cam member (560, 570), the first friction member (700) of the friction structure (801), at least one washer ring, the first elastic member (111), the fifth elastic member (121), the shaft fixing portion (270), and a part of the coupling member (290) may be inserted into the first shaft (131).

[0086] According to one embodiment, the second shaft (132) may have the same or similar shape as the first shaft (131). For example, the second shaft (132) may have a rod shape in which the length in the y-axis or -y-axis direction is longer than the length in the x-axis or z-axis direction. The second shaft (132) may be formed of (or include, be formed of) a metal material having a strength greater than a specified size so as to support inserted components. For example, the third arm portion (421), the fourth arm portion (422) of the second arm member (420), the cam member (560, 570), the second friction member (800) of the friction structure (801), at least one washer ring, the second elastic member (112), the sixth elastic member (122), the shaft fixing portion (270), and a part of the coupling member (290) may be inserted into the second shaft (132).

[0087] According to one embodiment, the third shaft (133) may have the same or similar shape as the first shaft (131). For example, the third shaft (133) may have a rod shape in which the length in the y-axis or -y-axis direction is longer than the length in the x-axis or z-axis direction. For example, the third shaft (133) may include a first linkage gear (1731), a cam member (560, 570), a support member (900) of the friction structure (801) (or, a third friction member), a first friction member (700), a second friction member (800), at least one washer ring, a third elastic member (113), a seventh elastic member (123), a shaft fixing portion (270), and a part of a coupling member (290).

[0088] According to one embodiment, the fourth shaft (134) may have the same or similar shape as the third shaft (133). For example, the fourth shaft (134) may have a rod shape in which the length in the y-axis or -y-axis direction is longer than the length in the x-axis or z-axis direction. The fourth shaft (134) may be formed of a metal material having a strength greater than a specified size so as to support the inserted components. For example, the fourth shaft (134) may include a second linkage gear (1732), a cam member (560, 570), a support member (900) of the friction structure (801), a first friction member (700), a second friction member (800), at least one washer ring, a fourth elastic member (114), an eighth elastic member (124), a shaft fixing portion (270), and a part of a coupling member (290).

[0089] The first cam member (560) may include a first cam body (565) and at least one first moving cam portion (561). One surface of the first cam body (565) (e.g., a surface facing the +y-axis) may be formed to support the first elastic structure (110). At least one first moving cam portion (561) may be formed on the other surface of the first cam body (565) (e.g., a surface facing the -y-axis). The first moving cam portion (561) may be arranged to engage with the first cam structure (450) formed on the first arm portion (411) of the first arm member (410). The first moving cam portion (561) may have mountain portions and valley portions repeatedly arranged to protrude (or protrude) in the -y-axis direction. The top portion of the mountain portion of the first moving cam portion (561) may be formed higher than the surrounding area (e.g., valley portion) and the top portion may be formed flat.

[0090] The second cam member (570) may include a second cam body (575) and at least one second moving cam portion (571). The second cam member (570) may include a plurality of second cam holes in which at least a portion of each of the first shaft (131), the second shaft (132), the third shaft (133), and the fourth shaft (134) is received. Each of the plurality of second cam holes is formed to penetrate in the y-axis or the -y-axis direction, and may be formed at the center of the second moving cam portion (571). At least a portion of each of the first shaft (131), the second shaft (132), the third shaft (133), and the fourth shaft (134) may be inserted into the second cam holes of the second cam member (570), and then at least a portion of each of the first shaft (131), the second shaft (132), the third shaft (133), and the fourth shaft (134) may be received in the second cam holes. The second cam body (575) may have a cylindrical shape surrounding a second cam hole formed to penetrate the center in the y-axis or -y-axis direction. The second moving cam portion (571) may be arranged to engage with the third cam structure (440) formed in the first arm portion (411) of the first arm member (410). The second moving cam portion (571) may have mountain portions and valley portions repeatedly arranged to be formed in a state of protruding (or in a protruding state) in the -y-axis direction. The top portion of the mountain portion of the second moving cam portion (571) may be formed higher than the surroundings (e.g., valley portion) and the top portion may be formed flat.

[0091] According to one embodiment, the cam member (560, 570) may move backward in one direction (e.g., in the +y-axis direction) in response to the cam structure and cam member (560, 570) of the first arm member (410) and the cam structure and cam member (560, 570) of the second arm member (420) while the first arm member (410) and the second arm member (420) rotate within a certain angular range, and then, when the peaks and valleys of the cams (e.g., the cam structure and the cam portion) engage, move in the opposite direction (e.g., in the y-axis direction) of the one direction by the elasticity of the first elastic structure (110) and the second elastic structure (120) and return to the original position.

[0092] According to one embodiment, the friction structure (801) may be arranged to penetrate the first shaft (131), the second shaft (132), the third shaft (133), and the fourth shaft (134), and may be arranged to come into contact with the first arm portion (411) and the second arm portion (412) of the arm member.

[0093] According to one embodiment, a first shaft (131) is inserted into a first friction member (700) and a first arm member (410) of a friction structure (801), a second shaft (132) is inserted into a second friction member (800) and a second arm member (420) of a friction structure (801), and a third shaft (133) and a fourth shaft (134) are inserted into a support member (900) of the friction structure (801), and then the first arm member (410) and the second arm member (420) can rotate.

[0094] According to one embodiment, the first rock surface (e.g., the first rock surface (431) of FIG. 10) of the first arm member (410) rotates while in contact with the first outer surface (e.g., the first outer surface (731) of FIG. 10) of the first friction member (700), and the first outer peripheral surface (435) of the first arm member (410) rotates while in contact with the first outer curved surface (751) of the first friction member (700). Since the first rock surface of the first arm member (410) rotates while in contact with the first outer surface of the first friction member (700) included in the friction structure (801) in response to the elastic force provided by the first elastic structure (110) and / or the second elastic structure (120), rotational friction can be generated. The first outer circumferential surface of the first arm member (410) rotates while coming into contact with the first outer surface (731) of the first friction member (700) included in the friction structure (801) in response to the elastic force provided by the first elastic structure (110) and / or the second elastic structure (120), thereby generating cylindrical friction. While the foldable electronic device is changed from an unfolded state to a folded state or from a folded state to an unfolded state, the first outer curved surface (751) of the first friction member (700) maintains contact with the first outer circumferential surface (435) of the first arm member (410) in response to the pressure of the support member (900), and the first outer surface (731) of the first friction member (700) can maintain contact with the first arm surface of the first arm member (410).

[0095] According to one embodiment, the third rock surface (e.g., the surface facing the -y axis) of the second arm member (420) rotates while in contact with the third outer surface of the second friction member (800), and the second outer peripheral surface (1435) of the second arm member (420) can rotate while in contact with the second outer curved surface (851) (or the second curved surface) of the second friction member (800). Since the third rock surface of the second arm member (420) rotates while in contact with the third outer surface of the second friction member (800) included in the friction structure in response to the provision of elastic force by the first elastic structure (110) and / or the second elastic structure (120), rotational friction can be generated. The second outer circumferential surface (1435) of the second arm member (420) rotates while in contact with the second outer curved surface (851) of the second friction member (800) included in the friction structure (801) in response to the elastic force provided by the elastic structure (110) and / or the second elastic structure (120), thereby generating cylindrical friction. While the foldable electronic device is changed from an unfolded state to a folded state or from a folded state to an unfolded state, the second outer curved surface (851) of the second friction member (800) maintains contact with the second outer circumferential surface (1435) of the second arm member (420) in response to the pressure of the support member (900), and the third outer surface of the second friction member (800) can maintain contact with the third arm surface of the second arm member (420).

[0096] According to one embodiment, the rotational friction force and the cylindrical friction force between the arm member (410, 420) and the friction structure (801) may be used to maintain a specific angle of the foldable electronic device (200) or to prevent the foldable electronic device (200) from easily opening when in a folded state. The size of the contact surface of the cam member (560, 570) and the cam structure is smaller than the size of the contact surface of the arm member (410, 420) and the friction structure (801), so that the frictional force generated by the arm member (410, 420) and the frictional force (801) may be greater than the frictional force generated by the cam member (560, 570) and the cam structure. Even if the size of the cam member is reduced in the process of implementing a slim foldable electronic device and the frictional force due to the cam operation is reduced, the frictional force required to maintain the angle in the flex operation can be secured through the cylindrical friction force and the rotational frictional force.

[0097] According to one embodiment, the first elastic structure (110) may include a plurality of elastic members (or elastic bodies) having a hollow spring shape at the center. For example, the first elastic structure (110) may include a first elastic member (111), a second elastic member (112), a third elastic member (113), and a fourth elastic member (114). Since the first elastic structure (110) is disposed between the first cam member (560) and the friction structure (801), it may act to push the first cam member (560) in one direction. At this time, the first elastic structure (110) may exert an elastic force to push the friction structure (801) toward the arm member (410, 420). Accordingly, the friction structure (801) is in contact with the female member (410, 420), and in response to the rotation of the female member (410, 420) and / or the shaft (131, 132, 133, 134), the female member (410, 420) rotates while in contact with the friction structure (801), thereby generating a rotational frictional force and a cylindrical frictional force.

[0098] According to one embodiment, the second elastic structure (120) may include a plurality of elastic members (or elastic bodies) having a hollow spring shape at the center. For example, the second elastic structure (120) may include a fifth elastic member (121), a sixth elastic member (122), a seventh elastic member (123), and an eighth elastic member (124). Since the second elastic structure (120) is disposed between the second cam member (570) and the shaft fixing portion (270), it may act to push the second cam member (570) in one direction.

[0099] According to one embodiment, the elastic force generated by the second elastic structure (120) may be similar to the elastic force generated by the first elastic structure (110) within a certain range.

[0100] According to one embodiment, the shaft fixing member (270) may include shaft holes in which a plurality of shafts can be mounted and fixed. The shaft fixing member (270) may include a plurality of shaft holes in which each of the first shaft (131), the second shaft (132), the third shaft (133), and the fourth shaft (134) is mounted and fixed. The shape of at least one of the plurality of shaft holes may be formed in a cylindrical shape identical to or similar to the z-axis cross-section of the corresponding shaft (131, 132, 133, 134).

[0101] According to one embodiment, a first main gear (171) may be arranged on one side of a first shaft (131). The first main gear (171) may be arranged in an integrated form with a second arm portion (412) of a first arm member (410). A second main gear (172) may be arranged on one side of a second shaft (132). The second main gear (172) may be arranged in an integrated form with a fourth arm portion (422) of a second arm member (420). At least one linkage gear (or idle gear) (173) may be arranged between the first main gear (171) and the second main gear (172) to be gear-coupled with the first main gear (171) and the second main gear (172). For example, at least one linkage gear (173) may include a first linkage gear (1731) gear-engaged with the first main gear (171), and a second linkage gear (1732) gear-engaged with the second main gear (172). The linkage gear (173) may be used to share the rotational force of the first shaft (131) and the rotational force of the second shaft (132). According to one embodiment, the first main gear (171) and the second main gear (172) have been described as having a structure formed on the arm member (410, 420) as an example, but the first main gear (171) and the second main gear (172) may be separated from the arm member and disposed separately.

[0102] As described above, the foldable electronic device (200) of the present invention can be made slim by applying at least one friction structure (801) to the first type hinge structure (240). Even if the structure of the cam member (560, 570) is reduced and the shape of the cam portion is reduced, the friction structure (801) provides cylindrical friction force and rotational friction force, thereby supporting more stable operation in the flex mode.

[0103] Fig. 6a is a drawing showing an example of a first female member according to one embodiment. In Fig. 6a <601> is a drawing of the first cancer member viewed from the -y-axis to the +y-axis. <602> is a drawing of the first cancer absence viewed from the +y-axis to the -y-axis.

[0104] Referring to FIGS. 3 to 6A, the first arm member (410) may include a first arm body (414), a first arm portion (411), a second arm portion (412), and a first slide portion (413). The first arm body (414) may be positioned between each of the first arm portion (411) and the second arm portion (412) and the first slide portion (413). The first arm body (414) may connect the first arm portion (411) and the first slide portion (413), and may connect the second arm portion (412) and the first slide portion (413).

[0105] The first arm body (414) can transmit the force of the first slide portion (413) sliding (or arcing) on ​​the first link member (310) to the first arm portion (411) and the second arm portion (412) while the foldable electronic device (200) is folded or unfolded. Alternatively, the first arm body (414) can transmit the rotational force of the first arm portion (411) and the second arm portion (412) to the first slide portion (413) while the first arm portion (411) and the second arm portion (412) rotate according to the rotation of the first shaft (131).

[0106] The first female portion (411) may include a first female surface (431) facing in one direction (e.g., the +y-axis direction), a second female surface (432) facing in the opposite direction to the first female surface (431), and a first outer peripheral surface (435) disposed between the first female surface (431) and the second female surface (432). For example, at least a portion of the first female portion (411) may be formed as a hollow cylinder.

[0107] The first arm portion (411) may include a first arm hole (441) formed to penetrate the first arm surface (431) and the second arm surface (432). The first arm portion (411) may be formed in a ring shape surrounding the first arm hole (441). The first arm hole (441) may have a diameter similar to that of the first shaft (131) so that the first shaft (131) may be inserted therein. The first arm hole (441) may be formed in a shape corresponding to the outer diameter of the first shaft (131). The z-axis cross-sectional shape of the first arm hole (441) may correspond to the z-axis cross-sectional shape of the first shaft (131). For example, when the z-axis cross-sectional shape of the first arm hole (441) is circular, the z-axis cross-sectional shape of the first shaft (131) may be circular.

[0108] The first female surface (431) may be arranged to face the friction structure (801). The first female surface (431) may be arranged to contact the first friction member (700) of the friction structure (801). The first female surface (431) may generate friction by contacting one surface of the first friction member (e.g., a surface facing the +y axis) facing the first female surface (431) by the elastic force of the elastic member. The first female surface (431) may be formed to have a flat surface. At least a portion of the first female surface (431) may be in contact with one surface of the first friction member.

[0109] The second rock surface (432) may include a third cam structure (440) (or a first cam structure formed on the second rock surface, or a first rotating cam structure) arranged to face the second cam member (570). The third cam structure (440) may be formed on a surface facing the second cam member (570). The third cam structure (440) may have mountains and valleys repeatedly arranged. The mountains of the third cam structure (440) may be formed in a positive shape protruding toward the second cam member (570). The valleys of the third cam structure (440) may be formed in a concave negative shape.

[0110] The first cam structure (450) is arranged to face (or contact) the moving cam portion of the first cam member (560) and can perform a cam operation according to the rotation of the first arm member (410) while being pressed by the first elastic member (111) and / or the fifth elastic member (121). For example, while the foldable electronic device (200) is placed at a specified angle (e.g., a specified angle between 0 degrees and 180 degrees), a ridge or protrusion of the shape (cam profile) of the third cam structure (440) can engage with the protrusion of the second cam member (570), and the protrusion of the first cam structure (450) can engage with the protrusion of the first cam member (560). While the upper part (or the top part of the mountain) of the third cam structure (440) and the upper part (or the top part of the mountain) of the second cam member (570) are in contact and the upper part (or the top part of the mountain) of the first cam structure (450) and the upper part (or the top part of the mountain) of the first cam member (560) are maintained in contact, the amount of compression of the first elastic member (111) and / or the fifth elastic member (121) and the amount of compression of the second elastic member (112) and / or the sixth elastic member (122) can be maintained above a certain amount. The frictional force of the corresponding surrounding structures (e.g., friction plates) can contribute to maintaining the foldable electronic device (200) at a specified angle.

[0111] It may include a first arm hole (441) formed to penetrate the first arm surface (431) and the second arm surface (432). The first arm portion (411) may be formed in a ring shape surrounding the first arm hole (441). The first arm hole (441) may have a diameter similar to that of the first shaft (131) so that the first shaft (131) may be inserted therein. The first arm hole (441) may be formed in a shape corresponding to the outer diameter of the first shaft (131). The z-axis cross-sectional shape of the first arm hole (441) may correspond to the z-axis cross-sectional shape of the first shaft (131). For example, when the z-axis cross-sectional shape of the first arm hole (441) is circular, the z-axis cross-sectional shape of the first shaft (131) may be circular.

[0112] The second arm portion (412) may be formed to be spaced apart from the first arm portion in the y-axis direction. A first main gear (171) formed in a gear pattern may be formed on at least a portion of the outer circumference of the second arm portion (412). The first main gear (171) may be formed in a shape in which mountains and valleys are repeated along the circumference of the second circumferential surface (433). The first main gear (171) may be arranged to mesh with the first linkage gear (1731).

[0113] The first slide portion (413) may include a first rail protrusion (413a) protruding in the -y-axis direction on one side of the first slide portion (413) and a second rail protrusion (413b) protruding in the +y-axis direction on the other side of the first slide portion (413). The first rail protrusion (413a) and the second rail protrusion (413b) may be fastened to link protrusions formed on both inner walls of the first slide mounting portion (312).

[0114] According to one embodiment, the second arm member (420) includes a second arm body (424), a third arm portion (421), a fourth arm portion (422), a second cam structure (470), a fourth cam structure (460), and a second slide portion (423), wherein the second arm body (424) corresponds to the first arm body (414) of the first arm member (410), the third arm portion (421) corresponds to the first arm portion (411) of the first arm member (410), the fourth arm portion (422) corresponds to the second arm portion (412) of the first arm member (410), the second cam structure (470) corresponds to the first cam structure (450) of the first arm member (410), the fourth cam structure (460) corresponds to the third cam structure (440) of the first arm member (410), and the second The slide portion (423) may correspond to the first slide portion (413) of the first arm member (410). Accordingly, the description of the detailed structure of the second arm member (420) will be replaced with the description of the structure of the first arm member (410).

[0115] Meanwhile, in the description of the first type hinge structure (240) described above, the structures of the rail protrusion (or rail, rail structure) protruding from one side and the rail groove engraved (or sunken) from one side may be formed in opposite directions. For example, the protruding rail structure (or rail protrusion) formed on the first rotation member (510) may be changed to an engraved rail groove, and correspondingly, the first fixed rail groove (213a1) (or first rail groove, first groove) of the fixed bracket (530) coupled with the first rotation member (510) may be changed to a rail protrusion having a protruding structure. This structural change may be applied equally or similarly not only to the first rotation member (510), but also to the second rotation member (520), the first arm member (410) and the second arm member (420), and the first link member (310) and the second link member (320) coupled thereto, respectively.

[0116] Fig. 6b is a drawing showing an example of a linkage gear that is gear-coupled with the first female member and / or the second female member according to one embodiment. In Fig. 6b <611> is a perspective view of the linkage gear, <602> is a drawing showing an example of the front of a linkage gear viewed from the z-axis direction. <603> is a drawing showing an example of a side view of a linkage gear viewed from the y-axis direction.

[0117] Referring to FIGS. 3 to 6B, according to one embodiment, the linkage gears (173) may be provided as a pair to be gear-coupled to each of the first main gear (171) and the second main gear (172). For example, the pair of linkage gears (173) may include a first linkage gear (1731) gear-coupled to the first main gear (171) and a second linkage gear (1732) gear-coupled to the second main gear (172). At least one of the pair of linkage gears (173) may include a gear body (616), a gear portion (617), and a gear cam structure (614).

[0118] The gear body (616) may be formed in a cylindrical shape with a hollow center. The gear body (616) may be formed in a hollow shape having a gear hole (615). The gear body (616) may be formed to surround the gear hole (615) formed long in the y-axis direction. A third shaft (133) may be inserted into the gear hole (615) of a first linkage gear (1731) that is gear-coupled to the first main gear (171). A fourth shaft (134) may be inserted into the gear hole (615) of a second linkage gear (1732) that is gear-coupled to the second main gear (172).

[0119] The gear portion (617) may have multiple gear patterns formed on at least a portion of the outer surface of the gear body (616). The gear portion (617) may be formed in a form in which hills and valleys are repeated along the perimeter of the outer surface of the gear body (616). The hills and valleys of the gear portion (617) may be formed to be long in the y-axis direction. The gear portion (617) of the first linkage gear (1731) may be arranged to mesh with the first main gear (171). The gear portion (617) of the second linkage gear (1732) may be arranged to mesh with the second main gear (172).

[0120] The gear cam structure (614) may be arranged to face (or contact) the fixed cam portion of the first cam member (560). The gear cam structure (614) may be formed on one side of the gear body (616) facing the first cam member (560) (e.g., the side facing the +y-axis). The gear cam structure (614) may have mountains protruding in the +y-axis direction and valleys recessed in the -y-axis direction repeatedly arranged. The mountains of the gear cam structure (614) may be formed in a positive shape protruding toward the first cam member (560). The valleys of the gear cam structure (614) may be formed in a concave negative shape.

[0121] The gear cam structure (614) of the first linkage gear (1731) can perform a cam operation according to the rotation of the first linkage gear (1731) that rotates while engaging with the first main gear (171) in a state where it is pressed by the third elastic member (113). The gear cam structure (614) of the second linkage gear (1732) can perform a cam operation according to the rotation of the second linkage gear (1732) that rotates while engaging with the second main gear (172) in a state where it is pressed by the fourth elastic member (114).

[0122] According to one embodiment, while the foldable electronic device (200) is held at a specified angle (e.g., a specified angle greater than 0 degrees and less than 180 degrees), the mountain portion of the gear cam structure (614) may engage the protruding portion of the first cam member (560). The top portion of the mountain of the gear cam structure (614) may be configured such that while the upper portion (or the top portion of the mountain) of the first cam member (560) remains in contact, the compression amount of the third elastic member (113) and / or the fourth elastic member (114) may be maintained above a certain amount. The frictional force of the corresponding surrounding structures (e.g., friction plates) may contribute to maintaining the foldable electronic device at the specified angle.

[0123] Fig. 6c is a drawing showing an example of a first cam member according to one embodiment. In Fig. 6c, <621> is a drawing showing an example of a front view of a first cam member according to an embodiment of the present invention as viewed in the z-axis direction; <622> is a drawing showing an example of a perspective view of a first cam member according to one embodiment.

[0124] Referring to FIGS. 3 to 6C, according to one embodiment, the first cam member (560) may include a first cam body (565) having one side facing the first elastic structure (110) (e.g., a side facing the +y-axis), and a first moving cam portion (561). The first moving cam portion (561) may include a first cam portion (5611) (or a first outer cam portion), a second cam portion (5612) (or a second outer cam portion), a third cam portion (5613) (or a first inner cam portion), and a fourth cam portion (5614) (or a second inner cam portion).

[0125] Each of the first cam portion (5611), the second cam portion (5612), the third cam portion (5613), and the fourth cam portion (5614) may include a first cam hole (562). The first cam hole (562) is formed to penetrate in the y-axis or -y-axis direction, and may be formed in the center of each of the first cam portion (5611), the second cam portion (5612), the third cam portion (5613), and the fourth cam portion (5614). Each of the first cam portion (5611), the second cam portion (5612), the third cam portion (5613), and the fourth cam portion (5614) may have a cylindrical shape surrounding the first cam hole (562) formed to penetrate in the y-axis or -y-axis direction at the center in volume.

[0126] At least a portion of the first shaft (131) can be inserted into the first cam hole (562) of the first cam portion (5611). At least a portion of the first shaft (131) can be accommodated within the first cam hole (562) of the first cam portion (5611). At least a portion of the second shaft (132) can be inserted into the first cam hole (562) of the second cam portion (5612). At least a portion of the second shaft (132) can be accommodated within the first cam hole (562) of the second cam portion (5612). At least a portion of the third shaft (133) can be inserted into the first cam hole (562) of the third cam portion (5613). At least a portion of the third shaft (133) can be accommodated within the first cam hole (562) of the third cam portion (5613). At least a portion of the fourth shaft (134) can be inserted into the first cam hole (562) of the fourth cam portion (5614). At least a portion of the fourth shaft (134) can be accommodated within the first cam hole (562) of the fourth cam portion (5614).

[0127] Each of the first cam portion (5611), the second cam portion (5612), the third cam portion (5613), and the fourth cam portion (5614) may have mountain portions and valley portions that protrude in the -y-axis direction repeatedly arranged. The first cam portion (5611) may be arranged to engage with the first cam structure (450) formed on the first arm portion (411) of the first arm member (410). The second cam portion (5612) may be arranged to engage with the first cam structure (450) formed on the third arm portion (421) of the second arm member (420). The third cam portion (5613) may be arranged to engage with the gear cam structure (614) of the first linkage gear (1731). The fourth cam portion (5614) may be arranged to engage with the gear cam structure (614) of the second linkage gear (1732).

[0128] FIG. 6d is a drawing showing an example of the arrangement of the arm member and the cam member in the unfolded state of the foldable electronic device according to one embodiment. FIG. 6e is a drawing showing an example of the arrangement of the arm member and the cam member in the folded state of the foldable electronic device according to one embodiment. In FIG. 6d, <631> is a perspective view showing the female member and the second cam member in the unfolded state of the electronic device; <632> is a rear view of the arm member and the second cam member in the unfolded state of the electronic device, viewed in the -z-axis direction. In Fig. 6e, <641> is a perspective view showing the female member and the second cam member in a folded state of the electronic device; <642> is a rear view of the arm member and the second cam member in the folded state of the electronic device as viewed in the -z-axis direction.

[0129] Referring to FIGS. 1 to 6E, the first housing (210) and the second housing (220) can rotate in the direction in which the electronic device is unfolded due to an external pressure applied from the outside (e.g., a force applied to the electronic device by a user). For example, when the electronic device is unfolded, the first housing (210) can rotate in the clockwise direction, and the second housing (220) can rotate in the counterclockwise direction. When the external pressure applied from the outside (e.g., a force applied to the electronic device by a user), the first housing (210) and the second housing (220) can rotate in the direction in which the electronic device is folded. For example, the first housing (210) can rotate in the counterclockwise direction, and the second housing (220) can rotate in the clockwise direction.

[0130] When the first housing (210) and the second housing (220) rotate, the first arm member (410) can rotate in the same direction as the first housing, and the second arm member (420) can rotate in the same direction as the second housing (220). As the first arm member (410) and the second arm member (420) rotate, the first cam structure (450) of the first arm member (410), the second cam structure (470) of the second arm member (420), and the linkage gear (173) can rotate. As the first cam structure (450), the linkage gear (173), and the second cam structure (470) rotate, the first cam member (560) in contact with the first cam structure (450), the gear cam structure (614), and the second cam structure (470) can move in a direction closer to the friction structure (801). The first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) can be compressed by the first cam member (560) moving in a direction approaching the friction structure (801). The first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) can exert an elastic force (Fa) to push the first cam portion (5611), the second cam portion (5612), the third cam portion (5613), and the fourth cam portion (5614) of the first cam member (560) toward the first cam structure (450), the gear cam structure (614), and the second cam structure (470). By the elastic force (Fa) of each of the first cam part (5611), the second cam part (5612), the third cam part (5613), and the fourth cam part (5614), when the first cam structure (450), the gear cam structure (614), and the second cam structure (470) are brought into contact with each of the first cam member (560), the first cam structure (450), the gear cam structure (614), and the second cam structure (470), a frictional force may be generated between each of the first cam structure (450), the gear cam structure (614), and the second cam structure (470).The frictional force generated between each of the first cam structure (450), the gear cam structure (614), and the second cam structure (470) and the first cam member (560) acts as a resistance force that impedes the rotation of the first arm member (410) and the second arm member (420), thereby allowing the electronic device to maintain a stationary state (e.g., an unfolded state or a folded state).

[0131] Figure 7 is a drawing showing a portion of a hinge structure including a friction structure according to one embodiment. In Figure 7, <701> is a plan view showing a portion of a hinge structure coupled with a friction structure according to one embodiment; <702> is a perspective view showing a friction structure according to one embodiment. FIG. 8 is a drawing showing a first friction member included in a friction structure according to one embodiment. In FIG. 8, <821> , <822> , <823> and <824> are different drawings illustrating an embodiment of a first friction member. FIG. 9 is a drawing showing a support member included in a friction structure according to one embodiment. In FIG. 9, <901> , <902> and <903> are different drawings illustrating embodiments of the support member.

[0132] Referring to FIGS. 1 to 9, according to one embodiment, a friction structure (or friction member, force transmission member, torque providing member) (500) may include a first friction member (700) (or first outer member, first edge member), a second friction member (800) (or second outer member, second edge member), and a support member (900) (or inner member, center member, third friction member).

[0133] The first friction member (700) may be disposed to penetrate the first shaft (131) and the third shaft (133). The first friction member (700) may be disposed between the first arm portion (411) of the first arm member (410) and the support member (900) to contact at least a portion of each of the first arm portion (411) of the first arm member (410) and the support member (900). For example, the first friction member (700) may include a first outer body (713) (or, a first body), a first outer portion (711), and a second outer portion (712).

[0134] The first outer portion (711) may protrude from the first outer body (713) in the -x-axis direction. The first outer portion (711) may protrude from one end (e.g., the end facing the -y-axis) of the first outer body (713) toward the first arm member (410).

[0135] The first friction member (700) may have a cylindrical shape with a hollow center, with a first outer hole (741) formed in the y-axis direction. The first outer portion (711) may be formed in a ring shape surrounding the first outer hole (741). A first shaft (131) may be inserted into the first outer hole (741). The first outer hole (741) may have a diameter similar to that of the first shaft (131) so that the first shaft (131) may be inserted therein. A cross-sectional shape (or z-axis cross-sectional shape) of the first outer hole (741) taken in the z-axis direction may correspond to a cross-sectional shape of the first shaft (131) in the z-axis direction. For example, when the z-axis cross-sectional shape of the first outer hole (741) is circular, the z-axis cross-sectional shape of the first shaft (131) may be circular.

[0136] The first outer surface (731) (e.g., the surface facing the +y axis) of the first outer portion (711) may face (or come into contact with) the first female portion (411) of the first female member (410). The first outer surface (731) of the first outer portion (711) may generate friction by coming into contact with the first female surface (431) of the first female member (411) due to the elastic force of the first elastic member (111).

[0137] The second outer portion (712) may protrude from the first outer body (713) in an opposite direction to the first outer portion (711). The second outer portion (712) may protrude from the first outer body (713) in the +x-axis direction. The second outer portion (712) may protrude from the other end of the first outer body (713) toward the support member (900) and / or the second friction member (800). The second outer portion (712) may have a cylindrical shape with a hollow center, with a second outer hole (714) formed in the y-axis direction. The second outer portion (712) may be formed in a ring shape surrounding the second outer hole (714). A third shaft (133) may be inserted into the second outer hole (714). The second outer hole (714) may have a diameter similar to that of the third shaft (133) so that the third shaft (133) can be inserted therein. The cross-sectional shape (or z-axis cross-sectional shape) cut in the z-axis direction of the second outer hole (714) may correspond to the cross-sectional shape of the third shaft (133) in the z-axis direction. For example, when the z-axis cross-sectional shape of the second outer hole (714) is circular, the z-axis cross-sectional shape of the third shaft (133) may be circular.

[0138] The first outer body (713) may be disposed between the first outer part (711) and the second outer part (712). The first outer body (713) may connect the first outer part (711) and the second outer part (712). The y-axis length (or, the length parallel to the depth direction of the first outer hole (741)) of the first outer body (713) may be formed to be longer than the outer diameter of the first outer surface (731) of the first outer part (711). The contact area between the first outer body (713) and the first female part (411) may be formed to be larger than the contact area between the first outer surface (731) of the first outer part (711) and the first female part (411).

[0139] At least a portion of the first outer body (713) may be formed to surround a portion of the support member. For example, a portion of the first outer body (713) may include at least one outer inclined surface (761, 762) that faces (or contacts) at least one inner inclined surface. For example, the first outer body (713) may include a first outer inclined surface (761) and a second outer inclined surface (762). The first outer inclined surface (761) may be formed to be inclined with respect to each of the xz plane and the yz plane. For example, the first outer inclined surface (761) may be formed to be inclined at a constant angle with respect to each of the first outer portion (711) and the first outer body (713), between the first outer portion (711) and the first outer body (713). The second outer inclined surface (762) may be formed to be inclined at a predetermined angle between the second outer portion (712) and the first outer body (713), respectively, with respect to the second outer portion (712) and the first outer body (713). For example, the first outer inclined surface (761) and the second outer inclined surface (762) may be formed to be inclined at the same angle or different angles. The first outer inclined surface (761) and the second outer inclined surface (762), which may come into contact with the inclined surfaces (961, 962) of the support member (900), may transmit the elastic force of the first elastic member (111) to the first outer curved surface (751) (or the first curved surface) of the first friction member (700). The first outer slope (761) and the second outer slope (762) can convert the elastic force of the first elastic member (111) in a direction toward the first outer curved surface (751) and transmit it to the first outer curved surface (751).

[0140] At least a portion of the first outer body (713) may have a shape corresponding to the first arm portion (411) of the first arm member (410). For example, a portion of the first outer body (713) may include a first outer curved surface (751) surrounding a portion of the first arm portion (411) having a hollow cylindrical shape at the center. The first outer curved surface (751) may be formed in an arc shape engraved in the +x-axis direction. The first outer curved surface (751) of the first outer portion (711) may face (or contact) the first arm portion (411) of the first arm member (410) in the x-axis direction. The first outer surface (731) of the first outer portion (711) may contact the first outer peripheral surface (435) of the first arm portion (411) by the elastic force of the first elastic member (111) to generate friction.

[0141] The second friction member (800) may be disposed to penetrate the second shaft (132) and the fourth shaft (134). The second friction member (800) may be disposed between the third arm portion (421) of the second arm member (420) and the support member (900) to contact at least a portion of each of the third arm portion (421) of the second arm member (420) and the support member (900).

[0142] According to one embodiment, the second friction member (800) may be formed to be symmetrical with the first friction member (700) with respect to the y-axis (or with the support member (900) therebetween). The second friction member (800) may include a configuration identical to, corresponding to, or similar to the first friction member (700). For example, the second friction member (800) may include a second outer body (813) (or second body), a third outer portion (811), and a fourth outer portion (812). The second outer body (813) including the third outer slope (861) and the fourth outer slope (862) and the second outer curved surface (851) may correspond to the first outer body (713) including the first outer slope (761) and the second outer slope (762) and the first outer curved surface (751), and the third outer portion (811) including the third outer hole (841) and the second outer surface (831) may correspond to the first outer portion (711) including the first outer hole (741) and the first outer surface (731). The fourth outer portion (812) including the fourth outer hole (814) may correspond to the second outer portion (712) including the second outer hole (714). Accordingly, the description of the detailed structure of the second friction member (800) will be replaced with the description of the structure of the first friction member (700).

[0143] According to one embodiment, the support member (900) may be arranged to be surrounded by the first elastic structure (110), the first friction member (700), and the second friction member (800).

[0144] The support member (900) may be disposed to penetrate the third shaft (133) and the fourth shaft (134). The support member (900) may be disposed between the first friction member (700) and the second friction member (800) to contact at least a portion of each of the first outer body (713), the second outer portion (712), the second outer body (813), and the fourth outer portion (812).

[0145] The support member (900) may include a support body (913), a first support portion (911), and a second support portion (912).

[0146] The support body (913) can be placed between the first support portion (911) and the second support portion (912). The support body (913) can connect the first support portion (911) and the second support portion (912).

[0147] The first support portion (911) may protrude from the support body (913) in the -x-axis direction. The first support portion (911) may extend from one side of the support body (913) (e.g., the side facing the -x-axis) toward the first friction member (700) and / or the first arm member (410). The first support portion (911) may have a cylindrical shape with a hollow center, with a first inner hole (914) formed in the y-axis direction. The first support portion (911) may be formed in a ring shape surrounding the first inner hole (914). The first inner hole (914) may be communicated with the second outer hole (714). A third shaft (133) may be inserted into the first inner hole (914) communicating with the second outer hole (714). The first inner hole (914) may have a diameter similar to that of the third shaft (133) so that the third shaft (133) can be inserted therein. The cross-sectional shape (or z-axis cross-sectional shape) cut in the z-axis direction of the first inner hole (914) may correspond to the cross-sectional shape of the third shaft (133) in the z-axis direction. For example, when the z-axis cross-sectional shape of the first inner hole (914) is circular, the z-axis cross-sectional shape of the third shaft (133) may be circular.

[0148] At least a portion of the first support portion (911) may include at least one inner inclined surface (961, 962) that faces (or contacts) the outer inclined surface (761, 762) of the first friction member. For example, the first support portion (911) may include at least one first inner inclined surface (961) that faces the first outer inclined surface (761) and at least one second inner inclined surface (962) that faces the second outer inclined surface (762). At least one of the first inner inclined surface (961) and the second inner inclined surface (962) may be formed to be inclined with respect to each of the xz plane and the yz plane. For example, the first inner inclined surface (961) and the second inner inclined surface (962) may be formed to be inclined at the same angle or at different angles. The first inner inclined surface (961) and the second inner inclined surface (962) can transfer the elastic force of the third elastic member (113) to the first outer curved surface (751) of the first friction member (700). The first inner inclined surface (961) and the second inner inclined surface (962), which are in contact with the first outer inclined surface (761) and the second outer inclined surface (762), can convert the elastic force of the third elastic member (113) in a direction toward the first outer curved surface (751) and transfer it to the first outer curved surface (751). The support member (900) can press the first friction member (700) in a first direction (e.g., -x-axis direction) toward the first arm member (410) based on the elastic force of the third elastic member (113).

[0149] The second support portion (912) may protrude from the support body (913) in the opposite direction to the first support portion (911). The second support portion (912) may protrude from the support body (913) in the +x-axis direction. The second support portion (912) may extend from the other end of the support body (913) toward the second friction member (800) and / or the second arm member (420). The second support portion (912) may have a cylindrical shape with a hollow center, with a second inner hole (915) formed in the y-axis direction. The second support portion (912) may be formed in a ring shape surrounding the second inner hole (915). The second inner hole (915) may be communicated with the fourth outer hole (814). A fourth shaft (134) can be inserted into a second inner hole (915) that is connected to the second inner hole (915). The second inner hole (915) can have a diameter similar to that of the fourth shaft (134) so ​​that the fourth shaft (134) can be inserted therein. A cross-sectional shape (or, z-axis cross-sectional shape) taken in the z-axis direction of the second inner hole (915) can correspond to a cross-sectional shape of the fourth shaft (134) in the z-axis direction. For example, when the z-axis cross-sectional shape of the second inner hole (915) is circular, the z-axis cross-sectional shape of the fourth shaft (134) can be circular.

[0150] At least a portion of the second support portion (912) may include at least one inner inclined surface (971, 972) that faces (or contacts) the outer inclined surfaces (861, 862) of the second friction member (800). For example, the second support portion (912) may include at least one third inner inclined surface (971) that faces the third outer inclined surface (861) and at least one fourth inner inclined surface (972) that faces the fourth outer inclined surface (862). At least one of the third inner inclined surface (971) and the fourth inner inclined surface (972) may be formed to be inclined with respect to each of the xz plane and the yz plane. For example, the third inner inclined surface (971) and the fourth inner inclined surface (972) may be formed to be inclined at the same angle or at different angles. The third inner inclined surface (971) and the fourth inner inclined surface (972) can transfer the elastic force of the fourth elastic member (114) to the second outer curved surface (851) of the second friction member (800). The third inner inclined surface (971) and the fourth inner inclined surface (972), which are in contact with the third outer inclined surface (861) and the fourth outer inclined surface (862), can convert the elastic force of the fourth elastic member (114) in a direction toward the second outer curved surface (851) and transfer it to the second outer curved surface (851). The support member (900) can press the second friction member (800) in a second direction (e.g., +x axis direction) toward the second arm member (420) based on the elastic force of the fourth elastic member (114).

[0151] According to one embodiment, the first friction member (700) may have an eleventh length (7A), a twelfth length (7B), a thirteenth length (7C), and a fourteenth length (7D). The eleventh length (7A) may be a length of the first outer body (713) in the y-axis direction, or a length between the first outer inclined surface (761) and the second outer inclined surface (762). The eleventh length (7A) may be formed in proportion to a target friction area between the first friction member (700) and the first arm member (410). For example, the eleventh length (7A) of the first friction member (700) applied to a single foldable electronic device may be longer than the twelfth length (7B). For example, the eleventh length (7A) of the first friction member (700) applied to a multi-foldable electronic device may be shorter than the twelfth length (7B). The twelfth length (7B) may be a length in the x-axis direction from the second outer slope (762) to an end of the second outer portion (712). The twelfth length (7B) may be formed to be smaller than half of the thirteenth length (7C). The thirteenth length (7C) may be a length of the second outer portion (712) in the x-axis direction, or a maximum diameter of the second outer portion (712). For example, the thirteenth length (7C) may be similar to or equal to a diameter of at least one of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114). The fourteenth length (7D) may be a thickness of the first outer portion (711) or a length of the first outer portion (711) in the y-axis direction. The fourteenth length (7D) may be formed based on the rigidity of the first friction member (700). For example, the fourteenth length (7D) may be formed thicker than the twenty-first length (9E), which corresponds to the thickness of the mounting portion (916) on which the third elastic member (113) and the fourth elastic member (114) are mounted. When the first outer portion (711) of the first friction member (700) is pressed by the support member (900), damage to the first outer portion (711) may be prevented or minimized.

[0152] According to one embodiment, the support member (900) may have a twenty-first length (9E), a twenty-second length (9F), and a twenty-third length (9G). The twenty-first length may be the thickness (or the length in the y-axis direction) of the mounting portion (916) on which the third elastic member (113) and the fourth elastic member (114) are mounted. The twenty-second length (9F) may be the length in the y-axis direction between the first inner inclined surface (961) and the second inner inclined surface (962) and / or the length in the y-axis direction between the third inner inclined surface (971) and the fourth inner inclined surface (972). The twenty-second length (9F) may be similar to or identical to the eleventh length (7A). The twenty-third length (9G) may be the length in the x-axis direction of the mounting portion (916). The 23rd length (9G) may be formed to be greater than the 21st length (9E) and the 22nd length (9F). The 23rd length (9G) may be proportional to the number of elastic members mounted on the mounting portion (916). For example, the 23rd length may be a length corresponding to the sum of the diameters of the third elastic member (113) and the fourth elastic member (114).

[0153] According to one embodiment, the first outer slope (761) may be formed to have the same or similar slope as the second outer slope (762). The first inner slope (961) may be formed to have the same or similar slope as the second inner slope (962). The third inner slope (971) may be formed to have the same or similar slope as the fourth inner slope (972). For example, at least one of the first outer slope (761), the second outer slope (762), the first inner slope (961), the second inner slope (962), the third inner slope (971), and the fourth inner slope (972) may be formed to form an acute angle (9x, 9y) with respect to the x-axis. For example, at least one of the first outer slope (761), the second outer slope (762), the first inner slope (961), the second inner slope (962), the third inner slope (971), and the fourth inner slope (972) may be formed to form a 45 degree angle with respect to the x-axis.

[0154] FIG. 10 is a perspective view illustrating a coupling relationship between a friction structure and a first arm member of a hinge structure according to one embodiment.

[0155] Referring to FIGS. 1 to 10, a first type hinge structure according to an embodiment may include a friction structure (801) and a first arm member (410). Each component of the first type hinge structure according to an embodiment may correspond to each component of the first type hinge structure described above, except for the friction structure (801) and the first arm member (410). Accordingly, specific descriptions of the remaining components, except for the structures related to the friction structure (801) and the first arm member (410), may be replaced with the descriptions in FIGS. 1 to 9.

[0156] A friction structure (801) included in a first type of hinge structure according to one embodiment may include a first friction member (700), a second friction member (800), and a support member (900). A first outer surface (731) of the first friction member (700) may have a shape corresponding to a first rock surface (431) of the first arm member. Each of the first outer surface (731) of the first friction member (700) and the first rock surface (431) of the first arm member (410) may be formed in a circular shape having a through hole. Accordingly, since the first outer surface (731) of the first friction member (700) and the first rock surface (431) of the first arm member (410) are rotatable while in contact with each other, a rotational frictional force can be generated between the first outer surface (731) of the first friction member (700) and the first rock surface (431) of the first arm member (410).

[0157] A first arm portion (411) of a first arm member (410) included in a first type hinge structure according to one embodiment may be formed in a cylindrical shape having a through hole. A first outer curved surface (751) of a first friction member (700) facing the first arm portion (411) of the first arm member (410) may include a shape corresponding to a first outer peripheral surface (435) of the first arm member (410). To correspond to the first outer peripheral surface (435) of the first arm member (410) including a positive curved surface, the first outer curved surface (751) of the first friction member (700) may include a negative curved surface. Since the first outer curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410) are rotatable while in contact with each other, a cylindrical frictional force can be generated between the first outer curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410).

[0158] Fig. 11 is a plan view showing an example of a hinge structure including a friction structure according to one embodiment, Fig. 12 is a drawing showing an example of a force transmission state of a first friction member and a second friction member according to one embodiment, and Fig. 13 is a drawing showing an example of a force transmission state of a support member according to one embodiment. In Fig. 11 <1101> and <1102> is a drawing illustrating the first elastic force, the second elastic force, the third elastic force, and the fourth elastic force transmitted to the friction structure according to one embodiment. In FIG. 12 <1201> is a drawing illustrating a first elastic force and a second elastic force transmitted to a friction member according to an embodiment of the present invention; <1202> is a drawing for explaining the rotational friction generated on the outer surface of the rock member and the friction member according to one embodiment. In Fig. 13 <1301> is a drawing illustrating the third elastic force and the fourth elastic force transmitted to the support member according to one embodiment; <1302> is a drawing for explaining cylindrical friction occurring between the outer surface of a female member and the outer curved surface of a supporting member according to one embodiment.

[0159] Referring to FIGS. 1 to 13, the first elastic force (Fs1) of the first elastic member (111), the second elastic force (Fs2) of the second elastic member (112), the third elastic force (Fs3) of the third elastic member (113), and / or the fourth elastic force (Fs4) of the fourth elastic member (114) may be provided to the friction structure (801). The first elastic force (Fs1) of the first elastic member (111) may be provided to the first friction member (700). The first elastic member (111) may press the first friction member (700) in the longitudinal direction (or, +y-axis direction) of the first shaft (131). The second elastic force (Fs2) of the second elastic member (112) may be provided to the second friction member (800). The second elastic member (112) can press the second friction member (800) in the longitudinal direction (or +y-axis direction) of the fourth shaft (134). The third elastic force (Fs3) of the third elastic member (113) and the fourth elastic force (Fs4) of the fourth elastic member (114) can be provided to the support member (900).

[0160] In response to the first elastic force (Fs1) transmitted to the first outer portion (711) of the first friction member (700), the first outer surface (731) of the first friction member (700) can contact (or be in close contact with) the first rock surface (431) of the first arm member (410). The elastic force of the first elastic member (111) can act as a reaction force (e.g., vertical stress) between the first outer surface (731) of the first outer portion (711) of the first friction member (700) and the first rock surface (431) of the first arm portion (411) of the first arm member (410). Since the first outer surface (731) of the first friction member (700) and the first rock surface (431) of the first arm member (410) are formed substantially perpendicular to the first shaft (131) (or, y-axis direction), a reaction force between the first outer surface (731) of the first friction member (700) and the first rock surface (431) of the first arm member (410) can be formed in the direction of the first shaft (131) (e.g., y-axis direction). By the reaction force between the first outer surface (731) of the first friction member (700) and the first rock surface (431) of the first arm member (410), a rotational friction force can be generated between the first outer surface (731) and the first rock surface (431).

[0161] In response to the second elastic force (Fs2) transmitted to the third outer portion (811) of the second friction member (800), the second outer surface (831) of the second friction member (800) can contact (or adhere to) the second rock surface of the second arm member (420). The elastic force of the second elastic member (112) can act as a reaction force (e.g., vertical stress) between the second outer surface (831) of the third outer portion (811) of the second friction member (800) and the second rock surface of the third arm portion (421) of the second arm member (420). Since the second outer surface (831) of the second friction member (800) and the second rock surface of the second arm member (420) are formed substantially perpendicular to the second shaft (132) (or, y-axis direction), a reaction force between the second outer surface (831) of the second friction member (800) and the second rock surface of the second arm member (420) can be formed in the direction of the second shaft (132) (e.g., y-axis direction). By the reaction force between the second outer surface (831) of the second friction member (800) and the second rock surface of the second arm member (420), a rotational friction force can be generated between the second outer surface (831) and the second rock surface.

[0162] The third elastic force (Fs3) transmitted to the first support portion (911) of the support member (900) can be transmitted to the first outer inclined surface (761) of the first friction member (700) through the first inner inclined surface (961) of the first support portion (911). The third elastic force (Fs3) transmitted to the first support portion (911) of the support member (900) can be transmitted to the second outer inclined surface (762) of the first friction member (700) through the second inner inclined surface (962) of the first support portion (911). The third elastic force (Fs3) transmitted to the first outer inclined surface (761) and the second outer inclined surface (762) can be converted into a direction perpendicular to the third shaft (133) and transmitted to the first outer curved surface (751) of the first friction member (700). Based on the third elastic force (Fs3), the support member (900) can press the first friction member (700) in the direction toward the first arm member (410) (or, in the -x-axis direction). By the third elastic force (Fs3) transmitted to the first outer curved surface (751) of the first friction member (700), the first outer curved surface (751) of the first friction member (700) can contact (or, come into close contact with) the first outer peripheral surface (435) of the first arm member (410). The third elastic force (Fs3) transmitted to the first friction member (700) can act as a reaction force (e.g., normal stress) between the first outer peripheral surface (435) of the first arm member (410) and the first outer curved surface (751) of the first friction member (700). A cylindrical frictional force may be generated between the first outer peripheral surface (435) of the first female member (410) and the first outer curved surface (751) of the first friction member (700) by a reaction force (e.g., vertical stress) between the first outer peripheral surface (435) of the first female member (410) and the first outer curved surface (751) of the first friction member (700).

[0163] The fourth elastic force (Fs4) transmitted to the second support portion (912) of the support member (900) can be transmitted to the third outer inclined surface (861) of the second friction member (800) through the third inner inclined surface (971) of the second support portion (912). The fourth elastic force (Fs4) transmitted to the second support portion (912) of the support member (900) can be transmitted to the fourth outer inclined surface (862) of the second friction member (800) through the fourth inner inclined surface (972) of the second support portion (912). The fourth elastic force (Fs4) transmitted to the third outer inclined surface (861) and the fourth outer inclined surface (862) can be converted into a direction perpendicular to the fourth shaft (134) and transmitted to the second outer curved surface (851) of the second friction member (800). Based on the fourth elastic force (Fs4), the support member (900) can press the second friction member (800) in the direction toward the second arm member (420) (or in the +x-axis direction). By the fourth elastic force (Fs4) transferred to the second outer curved surface (851) of the second friction member (800), the second outer curved surface (851) of the second friction member (800) can contact (or come into close contact with) the second outer peripheral surface (1435) of the second arm member (420). The fourth elastic force (Fs4) transferred to the second friction member (800) can act as a reaction force (e.g., vertical stress) between the second outer peripheral surface (1435) of the second arm member (420) and the second outer curved surface (851) of the second friction member (800). A cylindrical frictional force may be generated between the second outer circumferential surface (1435) of the second arm member (420) and the second outer curved surface (851) of the second friction member (800) due to a reaction force (e.g., vertical stress) between the second outer circumferential surface (1435) of the second arm member (420) and the second outer curved surface (851) of the second friction member (800).

[0164] In one embodiment, in a flex mode where the foldable electronic device can maintain a specific state (e.g., a state where the foldable electronic device is opened between 60° and 120°, the angle can be changed), the angle can be maintained with greater force by utilizing not only cam friction but also rotational friction and cylindrical friction.

[0165] FIG. 14 is a drawing showing an example of a state of a hinge structure in an unfolded state (or a first state) of a foldable electronic device according to one embodiment, and FIG. 15 is a drawing showing an example of a state of a friction structure and a cam member in an unfolded state of a foldable electronic device according to one embodiment. In FIG. 14 <1402> represents a hinge structure <1401> This is an enlarged perspective view of a portion of Fig. 15. <1502> represents the friction structure and cam member. <1501> This is an enlarged perspective view of a portion of the .

[0166] Referring to FIGS. 1 to 15, a foldable electronic device according to an embodiment may have a fully unfolded state. When the electronic device is in the unfolded state (or, when the display (230) is in the unfolded state, when the first housing (210) and the second housing (220) are in the unfolded state), the first arm member (410) coupled to the first wing plate (1410 of FIG. 16) may be arranged symmetrically with respect to the second arm member (420) coupled to the second wing plate (1420 of FIG. 16) with respect to the center of the foldable electronic device. An end of the first arm member (410) in the -x-axis direction and an end of the second arm member (420) in the +x-axis direction may be spaced apart by a first distance (or a maximum distance).

[0167] According to one embodiment, when the foldable electronic device is in an unfolded state, a portion of an inclined surface of the female cam portion of the first cam structure (450) of the first female member (410) and a portion of an inclined surface of the moving cam portion of the first cam member (560) may come into contact. A top portion of the female cam portion of the first cam structure (450) (e.g., a portion facing the +y-axis or a portion facing the moving cam portion of the first cam member (560)) and a top portion of the moving cam portion of the first cam member (560) may be spaced apart from each other. An empty space (or gap) may be formed between the top portion of the female cam portion of the first cam structure (450) and the top portion of the moving cam portion of the first cam member (560).

[0168] According to one embodiment, when the foldable electronic device is in an unfolded state, a portion of an inclined surface of the female cam portion of the third cam structure (440) of the first female member (410) and a portion of an inclined surface of the moving cam portion of the second cam member (570) may come into contact. A top portion of the female cam portion of the third cam structure (440) (e.g., a portion facing the +y-axis or a portion facing the moving cam portion of the second cam member (570)) and a top portion of the moving cam portion of the second cam member (570) (e.g., a portion facing the -y-axis or a portion facing the female cam portion of the third cam structure (440)) may be spaced apart from each other. An empty space (or gap) may be formed between the top portion of the female cam portion of the third cam structure (440) and the top portion of the moving cam portion of the second cam member (570).

[0169] According to one embodiment, during at least a portion of a transition of a foldable electronic device (or hinge structure) from a folded state or an intermediate state to an unfolded state, the foldable electronic device can move (or move, translate, or rotate) in at least a portion of a rotational range (or a second rotational range, a second partial rotational range). The first arm member (410) and the second arm member (420) can rotate in a rotational range corresponding to at least the portion of the rotational range. With the rotation of the first arm member (410), the arm cam portion of the first cam structure (450) of the first arm member (410) can move along the inclined surface of the moving cam portion of the first cam member (560) toward the valley portion of the first cam member (560). By the rotation of the first arm member (410), the female cam portion of the third cam structure (440) of the first arm member (410) can move toward the valley portion of the second cam member (570) along the inclined surface of the moving cam portion of the second cam member (570). A part of the inclined surface of the moving cam portion of the first cam member (560) can come into contact with a part of the inclined surface of the female cam portion of the first cam structure (450) and the second cam structure (470), thereby generating a first cam frictional force. By the rotation of the second arm member (420), the female cam portion of the second cam structure (470) of the second arm member (420) can move toward the valley portion of the first cam member (560) along the inclined surface of the moving cam portion of the first cam member (560). By the rotation of the second arm member (420), the female cam portion of the fourth cam structure (460) of the second arm member (420) can move along the inclined surface of the moving cam portion of the second cam member (570) toward the valley portion of the second cam member (570). A portion of the inclined surface of the moving cam portion of the second cam member (570) can come into contact with a portion of the inclined surface of the female cam portion of the third cam structure (440) and the fourth cam structure (460), thereby generating a second cam frictional force.

[0170] When the electronic device moves to an unfolded state, the gap between each of the first cam structure (450) and the second cam structure (470) and the first cam member (560) may become relatively close, and the gap between each of the third cam structure (440) and the fourth cam structure (460) and the second cam member (570) may become relatively close. The first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) may be gradually tensioned (or relatively slightly compressed), so that the first elastic structure (110) may have a relatively tensioned state. The fifth elastic member (121), the sixth elastic member (122), the seventh elastic member (123), and the eighth elastic member (124) may be gradually tensioned, so that the second elastic structure (120) may have a relatively tensioned state (or slightly compressed state). The first cam frictional force acting between each of the first cam structure (450) and the second cam structure (470) and the first cam member (560) due to the gradually tensioned first elastic structure (110) can be reduced compared to the intermediate state. The second cam frictional force acting between each of the third cam structure (440) and the fourth cam structure (460) and the second cam member (570) due to the gradually tensioned second elastic structure (120) can be reduced compared to the intermediate state.

[0171] According to one embodiment, when the foldable electronic device is converted to an unfolded state, the elastic force of each of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) may be relatively reduced by the gradually tensioned first elastic structure (110). The relatively reduced elastic force of each of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) may be transmitted to the friction structure (801) including the first friction member (700), the second friction member (800), and the support member (900). By the relatively reduced elastic force of the first elastic member (111), the first friction member (700) may be pressed in a direction (e.g., in the +y-axis direction) toward the second cam member (570). By the relatively reduced elastic force of the second elastic member (112), the second friction member (800) can be pressed in a direction parallel to the first elastic member (111). By the elastic force of the third elastic member (113) and the fourth elastic member (114), the support member (900) can be pressed in a direction parallel to the second elastic member (112). The support member (900) can press the first friction member (700) in a direction toward the first arm member (410) based on the relatively reduced elastic force of the third elastic member (113) and the fourth elastic member (114), while pressing the second friction member (800) in a direction toward the second arm member (420). Due to the relatively reduced pressing force (or pressure) of the support member (900), the frictional contact between the first curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410) can be relatively reduced. When the first arm member (410) rotates within the rotational range when it is converted from an intermediate state to an unfolded state, a relatively weak frictional contact can be formed between the first outer curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410).Due to the relatively reduced pressing force (or pressure) of the support member (900), the frictional contact between the second outer curved surface (851) of the second friction member (800) and the second outer peripheral surface (1435) of the second arm member (420) can be relatively reduced. When the second arm member (420) rotates within the rotational range when it is converted from an intermediate state to an unfolded state, a relatively weak frictional contact can be formed between the second outer curved surface (851) of the second friction member (800) and the second outer peripheral surface (1435) of the second arm member (420).

[0172] According to one embodiment, the foldable electronic device can perform an operation of opening the foldable electronic device with less force by using the first cam friction force and the second cam friction force, as well as the rotational friction force and the cylindrical friction force. According to one embodiment, even if the size of the cam member is reduced and the first cam friction force and / or the second cam friction force is reduced, the operation of opening the electronic device can be performed using the rotational friction force and the cylindrical friction force. The foldable electronic device according to one embodiment can enable a reduction in the size of the cam member (560, 570) and a slimmer electronic device.

[0173] FIG. 16 is a drawing showing an example of a state of a hinge structure in an intermediate state (or a third state) of a foldable electronic device according to an embodiment, and FIG. 17 is a drawing showing an example of a state of a friction structure and a cam member in an intermediate state of a foldable electronic device according to an embodiment. In FIG. 16, <1602> represents a hinge structure <1601> This is an enlarged perspective view of a portion of Fig. 17. <1702> represents the friction structure and cam member. <1701> This is an enlarged perspective view of a portion of the .

[0174] Referring to FIGS. 1 to 17, according to one embodiment, when external pressure is applied to a foldable electronic device in an unfolded state or a fully folded state, the electronic device may transition to an intermediate state of a first angle. For example, the first angle may include any one of angles between 60 degrees and 120 degrees. In the intermediate state of the first angle, the end of the first arm member (410) in the -x-axis direction and the end of the second arm member (420) in the +x-axis direction may be spaced apart by a second distance that is shorter than the first distance (or the longest distance). According to one embodiment, in at least a portion of a section in which the foldable electronic device (or hinge structure) transitions from the unfolded state or the folded state to the intermediate state, the foldable electronic device may perform (or move, travel, rotate) in at least a portion of a rotation range (or a first rotation range, a first partial rotation range). The first arm member (410) and the second arm member (420) can rotate at least a portion of the rotation range (or, a second rotation range, a second partial rotation range) corresponding to the first angle.

[0175] When the electronic device is in an intermediate state of the first angle, a normal portion (e.g., a portion facing the +y-axis) of the cam structure (440, 450) of the first arm member (410) and a normal portion (e.g., a portion facing the -y-axis) of the cam member (560, 570) may be in contact. While the electronic device changes from an unfolded state (or a fully folded state) to an intermediate state of the first angle, a contact area between a normal portion (e.g., a portion facing the y-axis) of the female cam portion of the cam structure (440, 450) of the first arm member (410) and a normal portion of the moving cam portion of the cam member (560, 570) may gradually increase. For example, when the electronic device is in an intermediate state of the first angle, the contact area between the top portion of the cam structure (440, 450) of the first arm member (410) and the top portion of the cam member (560, 570) (e.g., the top portion of a mountain) can be maximized.

[0176] According to one embodiment, when the foldable electronic device is in an intermediate state of the first angle, at least a portion of a top portion of a moving cam portion of the second cam member (570) may be in contact with at least a portion of a top portion of a female cam portion of the third cam structure (440). A first cam frictional force may be generated between at least a portion of a top portion of the moving cam portion of the second cam member (570) and at least a portion of a top portion of the female cam portion of the third cam structure (440). As the contact area between the female cam portion of the third cam structure (440) and the moving cam portion of the second cam member (570) increases in the intermediate state of the first angle, the first cam frictional force may increase. The first cam frictional force in the intermediate state of the first angle may have a greater magnitude than the first cam frictional force in the unfolded state and / or the fully folded state.

[0177] According to one embodiment, when the foldable electronic device is in an intermediate state of the first angle, at least a portion of a top portion of the moving cam portion of the first cam member (560) may come into contact with at least a portion of a top portion of the female cam portion of the first cam structure (450). A second cam frictional force may be generated between at least a portion of the top portion of the moving cam portion of the first cam member (560) and at least a portion of the top portion of the female cam portion of the first cam structure (450). As the contact area between the female cam portion of the third cam structure (440) and the moving cam portion of the first cam member (560) increases in the intermediate state of the first angle, the second cam frictional force may increase. The second cam frictional force in the intermediate state of the first angle may have a greater magnitude than the second cam frictional force in the unfolded state and / or the fully folded state.

[0178] According to one embodiment, when the foldable electronic device is converted from an unfolded state or a folded state to an intermediate state of the first angle, the gap between each of the first cam structure (450) and the second cam structure (470) and the first cam member (560) may become relatively wider, and the gap between each of the third cam structure (440) and the fourth cam structure (460) and the second cam member (570) may become relatively wider. The first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) may be gradually compressed (or strongly compressed), so that the first elastic structure (110) may have a relatively compressed state. The fifth elastic member (121), the sixth elastic member (122), the seventh elastic member (123), and the eighth elastic member (124) may be gradually compressed, so that the second elastic structure (120) may have a relatively compressed state.

[0179] The elastic force of each of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) included in the first elastic structure (110) that is gradually compressed can be relatively increased. The relatively increased elastic force of each of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) can be transmitted to the friction structure (801). The first elastic structure (110) can relatively strongly press the friction structure (801) with a relatively large elastic force. The first elastic member (111) can relatively strongly press the first friction member (700), the second elastic member (112) can relatively strongly press the second friction member (800), and the third elastic member (113) and the fourth elastic member (114) can relatively strongly press the support member (900). The support member (900) can press the first friction member (700) toward the first arm member (410) based on the relatively increased elasticity of the third elastic member (113) and the fourth elastic member (114), while pressing the second friction member (800) toward the second arm member (420). Due to the relatively increased pressing force (or pressure) of the support member (900), the frictional contact between the first curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410) can be relatively increased. When the first arm member (410) rotates within the rotation range when it is converted from the unfolded or folded state to the arched state, a relatively strong frictional contact can be formed between the first outer curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410). By the relatively increased pressing force (or pressure) of the support member (900), the frictional contact between the second outer curved surface (851) of the second friction member (800) and the second outer peripheral surface (1435) of the second arm member (420) can be relatively increased.When the second arm member (420) rotates within the rotation range from the unfolded or folded state to the intermediate state, a relatively strong frictional contact can be formed between the second outer curved surface (851) of the second friction member (800) and the second outer peripheral surface (1435) of the second arm member (420). According to one embodiment, the foldable electronic device in the intermediate state of the first angle can maintain the mounting angle with a greater force by utilizing the increased first cam frictional force and / or the increased second cam frictional force, as well as the increased rotational frictional force and the increased cylindrical frictional force, compared to the unfolded state and / or the folded state. The foldable electronic device in the intermediate state of the first angle can provide a stable mounting angle by utilizing a higher frictional force than when in the unfolded state and / or the folded state.

[0180] FIG. 18 is a drawing showing an example of a state of a hinge structure in a folded state of a foldable electronic device according to an embodiment, and FIG. 19 is a drawing showing an example of a state of a friction structure and a cam member in a folded state of a foldable electronic device according to an embodiment. In FIG. 18 <1802> represents a hinge structure <1801> This is an enlarged drawing of a part of Fig. 19. <1902> represents the friction structure and cam member. <1901> This is an enlarged drawing of a part of .

[0181] Referring to FIGS. 1 to 19, when external pressure is applied to a foldable electronic device in an intermediate state or an unfolded state at a first angle, the electronic device may be converted to a fully folded state. In the fully folded state, a third distance (or a shortest distance) shorter than the second distance may be spaced between an end of the first arm member (410) in the -x-axis direction and an end of the second arm member (420) in the +x-axis direction. According to one embodiment, in at least a portion of a section in which the foldable electronic device (or hinge structure) is converted from an unfolded state or an intermediate state to a folded state, the foldable electronic device may be capable of performing (or moving, translating, or rotating) at least a portion of a rotation range (or a second rotation range, a second partial rotation range). The first arm member (410) and the second arm member (420) may be capable of rotating at least a portion of a rotation range corresponding to the second rotation range (or the second rotation range, the second partial rotation range).

[0182] When the electronic device is in a folded state, a part of an inclined surface of the female cam portion of the third cam structure (440) of the first female member (410) and a part of an inclined surface of the moving cam portion of the second cam member (570) may come into contact. While the electronic device changes from an intermediate state of the first angle to a folded state, a contact area between a normal portion (e.g., a portion facing the y-axis) of the female cam portion of the cam structure (440, 450) of the first female member (410) and a normal portion of the moving cam portion of the cam member (560, 570) may gradually decrease.

[0183] According to one embodiment, when the foldable electronic device is in a folded state, a portion of an inclined surface of a moving cam portion of the second cam member (570) may come into contact with at least a portion of an inclined surface of a female cam portion of the third cam structure (440). A first cam frictional force may be generated between at least a portion of the inclined surface of the moving cam portion of the second cam member (570) and at least a portion of the inclined surface of the female cam portion of the third cam structure (440). As the contact area between the female cam portion of the third cam structure (440) and the moving cam portion of the second cam member (570) decreases in an intermediate state of the first angle, the first cam frictional force may be reduced. The first cam frictional force in the folded state may have a smaller magnitude than the first cam frictional force in the intermediate state of the first angle.

[0184] According to one embodiment, when the foldable electronic device is in a folded state, a portion of an inclined surface of a moving cam portion of the first cam member (560) may come into contact with a portion of an inclined surface of a female cam portion of the first cam structure (450). A second cam frictional force may be generated between a portion of the inclined surface of the moving cam portion of the first cam member (560) and a portion of the inclined surface of the female cam portion of the first cam structure (450). As the contact area between the female cam portion of the first cam structure (450) and the moving cam portion of the first cam member (560) decreases in the folded state, the second cam frictional force may be reduced. The second cam frictional force in the folded state may have a smaller magnitude than the second cam frictional force in the intermediate state of the first angle.

[0185] According to one embodiment, in at least a portion of a section in which a foldable electronic device is converted from an unfolded state or an intermediate state to a folded state (or a second state), the gap between each of the first cam structure (450) and the second cam structure (470) and the first cam member (560) may become relatively closer, while the gap between each of the third cam structure (440) and the fourth cam structure (460) and the second cam member (570) may become relatively closer. The first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) may be gradually tensioned, so that the first elastic structure (110) may have a relatively tensioned state. The fifth elastic member (121), the sixth elastic member (122), the seventh elastic member (123), and the eighth elastic member (124) may be gradually tensioned, so that the second elastic structure (120) may have a relatively tensioned state.

[0186] The elastic force of each of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114), which are gradually stretched, can be relatively reduced. The relatively reduced elastic force of each of the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114), can be transmitted to the friction structure (801). The first elastic structure (110) can relatively weakly press the friction structure (801) with a relatively small elastic force. The first elastic member (111) can relatively weakly press the first friction member (700), the second elastic member (112) can relatively weakly press the second friction member (800), and the third elastic member (113) and the fourth elastic member (114) can relatively weakly press the support member (900). The support member (900) can press the first friction member (700) toward the first arm member (410) based on the relatively reduced elasticity of the third elastic member (113) and the fourth elastic member (114), while pressing the second friction member (800) toward the second arm member (420). Due to the relatively reduced pressing force (or pressure) of the support member (900), the frictional contact between the first curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410) can be relatively reduced. When the first arm member (410) rotates within the rotational range when it is converted from an unfolded state or an intermediate state to a folded state, a relatively weak frictional contact can be formed between the first outer curved surface (751) of the first friction member (700) and the first outer peripheral surface (435) of the first arm member (410). Due to the relatively reduced pressing force (or pressure) of the support member (900), the frictional contact between the second outer curved surface (851) of the second friction member (800) and the second outer peripheral surface (1435) of the second arm member (420) can be relatively reduced.When the second arm member (420) rotates within the rotation range from the unfolded state or intermediate state to the folded state, a relatively weak frictional contact can be formed between the second outer curved surface (851) of the second friction member (800) and the second outer peripheral surface (1435) of the second arm member (420).

[0187] According to one embodiment, a foldable electronic device when converted to a folded state or a foldable electronic device in a folded state can maintain a mounting angle with greater force by utilizing a first cam frictional force and / or a second cam frictional force, as well as a rotational frictional force and a cylindrical frictional force, which are reduced compared to an intermediate state. A foldable electronic device in a folded state can provide a stable mounting angle by utilizing a relatively lower frictional force than in an intermediate state.

[0188] FIG. 20 is a drawing showing a part of a second type of hinge structure according to one embodiment.

[0189] Referring to FIGS. 1 to 20, each component of the second type hinge structure according to one embodiment may correspond to each component of the first type hinge structure described above, except for the friction structure. Accordingly, the specific description of the remaining components, excluding the structure related to the friction structure, may be replaced with the descriptions in FIGS. 1 to 19. In FIG. 20 <2001> is a perspective view showing a portion of a second type of hinge structure including a friction structure according to one embodiment; <2002> is a drawing showing a friction structure according to one embodiment.

[0190] A friction structure (801) included in a second type of hinge structure according to one embodiment may include a first friction member (700), a second friction member (800), and a support member (900).

[0191] The first friction member (700) and the second friction member (800) can be spaced apart from each other with the first opening (2012) therebetween.

[0192] The support member (900) may include a support body (913), a first support portion (911), and a second support portion (912).

[0193] The support body (913) may be arranged between the first support portion (911) and the second support portion (912). The support body (913) may include a first support body (9131) and a second support body (9132) that are spaced apart from each other with a second opening (2011) therebetween. The second opening (2011) may be formed to extend in a direction parallel to the first shaft (131) (e.g., the first shaft (131) of FIG. 19) (or in the y-axis direction). The second opening (2011) may be formed to be in communication with the first opening (2012).

[0194] The support member (900) is divided into a first support portion (911) and a second support portion (912) independently through the opening (2011) of the support body (913), so that the first support portion (911) and the second support portion (912) can be operated independently.

[0195] The first support portion (911) can transmit the third elastic force (Fs3) of the third elastic member (113) to the first friction member (700). The third elastic force (Fs3) can be converted in a direction toward the first friction member (700) through the inclined surface of the first support portion (911) and the outer inclined surface (761, 762) of the first friction member (700) and transmitted to the first friction member (700).

[0196] The second support portion (912), which operates independently of the first support portion (911), can transmit the fourth elastic force of the fourth elastic member (114) to the second friction member (800). The fourth elastic force (Fs4) can be converted in a direction toward the second friction member (800) through the inclined surface of the second support portion (912) and the second outer inclined surface (861, 862) of the second friction member (800) and transmitted to the second friction member (800).

[0197] FIG. 21 is a drawing showing a part of a third type of hinge structure according to one embodiment, and FIG. 22 is a drawing showing in detail a friction structure of the third type of hinge structure according to one embodiment.

[0198] Referring to FIGS. 1 to 22, each component of the third type hinge structure according to one embodiment may correspond to each component of the first type hinge structure or / and the second type hinge structure described above, except for the friction structure. Accordingly, specific descriptions of the remaining components, excluding the structures related to the friction structure, may be replaced with the descriptions in FIGS. 1 to 20.

[0199] A third type of hinge structure according to one embodiment may include a friction structure (801) and a second friction structure (2100).

[0200] The friction structure (801) may include a first friction member (700), a second friction member (800), and a support member (900). The first friction member (700) may include a first outer inclined surface (761), a second outer inclined surface (762), and a first upper inclined surface (763). The second friction member (800) may include a third outer inclined surface (861), a fourth outer inclined surface (862), and a second upper inclined surface (863).

[0201] The first elastic structure (110) can act to push the friction structure (801) in a direction toward the second friction structure (2100). The upper elastic force (Fsu) exerted by the first elastic structure (110) can be transmitted to the rock surface (431) and the outer surface (435) of the arm member (410, 420) through the friction structure (801). The rock surfaces (431, 432) of the arm member (410, 420) rotate while contacting the outer surface (731, 831) of the friction member (700, 800) by the upper elastic force (Fsu), so that a rotational friction force can be generated between the rock surfaces (431, 432) of the arm member and the outer surface (731, 831) of the friction member (700, 800). The outer surface (435) of the female member (410, 420) rotates while in contact with the outer curved surface (751, 851) of the friction member (700, 800) by the upper elastic force (Fsu), so that a cylindrical frictional force can be generated between the outer surface (435) of the female member (410, 420) and the outer curved surface (751, 851) of the friction member (700, 800).

[0202] The second friction structure (2100) may be arranged to face the friction structure (801) in the y-axis direction. The second friction structure (2100) may be arranged between the friction structure (801) and the second cam member (570). The second friction structure (2100) may include a first lower inclined surface (2101) facing the first upper inclined surface (763) and a second lower inclined surface (2102) facing the second upper inclined surface (863). The second elastic structure (120) may act to push the second friction structure (2100) toward the friction structure (801). The lower elastic force (Fsd) exerted by the second elastic structure (120) may be transmitted to the first rock surface (431) and the first outer peripheral surface (435) of the rock member (410, 420) through the second friction structure (2100). The rock surface (431, 432) of the female member (410, 420) rotates while contacting the outer surface (731, 831) of the friction member (700, 800) by the lower elastic force (Fsd), so that a rotational frictional force can be generated between the rock surface (431, 432) of the female member and the outer surface (731, 831) of the friction member (700, 800). The outer peripheral surface (435) of the female member (410, 420) rotates while contacting the outer curved surface (751, 851) of the friction member (700, 800) by the lower elastic force (Fsd), so that a cylindrical frictional force can be generated between the outer peripheral surface (435) of the female member (410, 420) and the outer curved surface (751, 851) of the friction member (700, 800).

[0203] Figures 23a and 23b are drawings showing a part of a fourth type of hinge structure according to one embodiment. In Figure 23a <2301> is a perspective view showing a part of a fourth type hinge structure according to an embodiment of the present invention, and in FIG. 23b <2302> is a front view of a part of a fourth type hinge structure according to one embodiment, viewed in the z-axis direction; <2303> is a side view of a part of a fourth type hinge structure according to one embodiment, viewed in the y-axis direction. FIG. 24 is a drawing showing a friction member included in a friction structure of a fourth type hinge structure according to one embodiment. In FIG. 24, <2401> is a front view of the friction member viewed from the z-axis direction. <2402> is a top view of the friction member viewed from the y-axis direction, <2403> is a left side view of the friction member viewed from the x-axis direction. <2404> is a bottom view of the friction member viewed in the y-axis direction. Fig. 25 is a drawing showing a support member included in a friction structure according to one embodiment. In Fig. 25, <2501> is a front view of the support member viewed from the z-axis direction. <2502> is a top view of the support member viewed from the y-axis direction, <2503> is a left side view of the support member viewed from the x-axis direction. <2504> is a bottom view of the support member viewed in the y-axis direction.

[0204] Referring to FIGS. 1 to 25, each component of the fourth type hinge structure according to one embodiment may correspond to each component of the first type hinge structure, the second type hinge structure, or / and the third type hinge structure described above, except for the friction structure. Accordingly, specific descriptions of the remaining components, excluding the structure related to the friction structure, may be replaced with the descriptions in FIGS. 1 to 22. The fourth type hinge structure according to one embodiment may not include the third shaft (133) and the fourth shaft (134) described above, but may include the first shaft (131) and the second shaft (132).

[0205] A friction structure (2801) included in a fourth type of hinge structure according to one embodiment may include a first friction member (2700), a second friction member (2800), and a support member (2900).

[0206] The first friction member (2700) may include a first outer surface (2731) that faces (contacts) the first rock surface (431) of the first arm member (410). The first friction member (2700) may include a first outer hole (2741) into which the first shaft (131) may be inserted. The first friction member (2700) may generate a rotational frictional force by contacting the first rock surface (431) of the first arm member (410) by the elastic force of the first elastic member (111) fastened to the first shaft (131). The first friction member (2700) may include a first outer curved surface (2751) that faces the first outer peripheral surface (435) of the first arm portion (411). At least a portion of the first outer curved surface (2751) may be formed in an arc shape that is concavely bent in the +x-axis direction. At least a portion of the first outer curved surface (2751) can accommodate at least a portion of the first outer peripheral surface (435) of the first female portion (411) in the shape of a cylinder.

[0207] The second friction member (2800) may include a first portion (2811) and a second portion (2812).

[0208] The first portion (2811) may protrude from the second portion (2812) in the +x-axis direction and / or the -y-axis direction. The first portion (2811) may protrude from the second portion (2812) toward the second arm member (420). The first portion (2811) may include a second outer hole (2841) into which the second shaft (132) may be inserted. The second outer hole (2841) may have a diameter similar to that of the first shaft (131) so that the second shaft (132) may be inserted. The first portion (2811) may be formed in a ring shape surrounding the second outer hole (2841). The first portion (2811) may include a second outer surface (2831) that faces (contacts) the third arm surface of the second arm member (420). The second outer surface (2831) can generate a rotational frictional force by contacting the third rock surface of the second rock member (420) with the elastic force of the second elastic member (112) connected to the second shaft (132) through the second friction member (2800).

[0209] The second portion (2812) may protrude from the first portion (2811) in an opposite direction to the first portion (2811). The second portion (2812) may extend from the first portion (2811) toward the support member (2900). The second portion (2812) may include a second outer curved surface (2851) facing the outer surface of the third arm portion (421). At least a portion of the second outer curved surface (2851) may be formed in an arc shape that is concavely bent in the -x-axis direction. At least a portion of the outer surface of the cylindrical third arm portion (421) may be received in at least a portion of the second outer curved surface (2851). The second portion (2812) may include a first receiving portion (2813), a second receiving portion (2814), and a third receiving portion (2815) formed on an opposite surface of the second outer curved surface (2851). The first receiving portion (2813) may be formed in the form of an opening, a hole, or a recess so that at least a portion of the second central portion (2912) of the support member (2900) may be received. The second receiving portion (2814) may be formed in the form of an opening, a hole, or a recess so that at least a portion of the third central portion (2913) of the support member (2900) may be received. The third receiving portion (2815) may be formed in the form of an opening, a hole, or a recess so that at least a portion of the first central portion (2911) of the support member (2900) may be received.

[0210] According to one embodiment, the first friction member (2700) may include a configuration corresponding to the first portion (2811) and the second portion (2812) of the second friction member (2800). The first friction member (2700) may be arranged symmetrically with respect to the support member (2900) or the second friction member (2800) in the y-axis direction. The first friction member (2700) may include a third portion arranged symmetrically with respect to the first portion (2811) of the second friction member (2800), and a fourth portion arranged symmetrically with respect to the second portion (2812) of the second friction member (2800).

[0211] The support member (2900) may include a first center portion (2911), a second center portion (2912), and a third center portion (2913). The first center portion (2911) may be received in a third receiving portion (2815) of each of the first friction member (2700) and the second friction member (2800). The second center portion (2912) may protrude from the first center portion (2911) in the -x-axis direction and the +x-axis direction. The second center portion (2912) may include a first securing member (e.g., a pole) (2304) protruding in the -y-axis direction and a second securing member (e.g., a pole) (2305) on which a second inner elastic member (1114) is secured.

[0212] The third central portion (2913) may protrude from the first central portion (2911) in the -z-axis and +z-axis directions. The third central portion (2913) may include a first inner inclined surface (2962) facing the first outer inclined surface (2762) of the first friction member (2700), and a second inner inclined surface (2972) facing the second outer inclined surface (2862) of the second friction member (2800).

[0213] According to one embodiment, the elastic force of the first inner elastic member (2113) may act to cause the first friction member (2700) to push (or press) the first arm member (410) through the first inner inclined surface (2962) and the first outer inclined surface (2762) of the support member (2900). Accordingly, the first outer curved surface (2751) of the first friction member (2700) may contact the outer circumferential surface (435) of the cylindrical first arm portion (411), thereby generating a cylindrical frictional force. The elastic force of the second inner elastic member (2114) may act to cause the second friction member (2800) to push (or press) the second arm member (420) through the second inner inclined surface (2972) and the second outer inclined surface (2862) of the support member (2900). Accordingly, the second outer curved surface (2851) of the second friction member (2800) can generate a cylindrical frictional force by coming into contact with the outer surface of the second female member (420) in the shape of a cylinder.

[0214] In one embodiment, a foldable electronic device can secure frictional force required for maintaining an angle in a flex motion through cylindrical frictional force and rotational frictional force even when the size of the cam member is reduced in the process of implementing a slim foldable electronic device and the frictional force due to the cam motion is reduced.

[0215] Fig. 26 is a drawing showing a part of a fifth type hinge structure according to one embodiment, and Fig. 27 is a drawing showing a spiral structure and a linkage member shown in Fig. 26. In Fig. 27 <2701> is a perspective view showing a female member and a linkage member of a hinge structure according to one embodiment; <2702> is a cross-sectional view taken along the x-axis of a part of a female member and a linking member of a hinge structure according to one embodiment.

[0216] Referring to FIGS. 26 and 27, a fifth type of hinge structure according to one embodiment may include a fixed bracket (2530), a first rotation member (2510), a second rotation member (2520), a first arm member (2410), a second arm member (2420), a shaft fixing member (not shown), a friction structure (1801), a cam member (not shown), a first elastic structure (2110), and a linkage member (2590). The fixed bracket (2530), the first rotation member (2510), the second rotation member (2520), the shaft fixing portion (not shown), the cam member, the first elastic structure (2110), and the second elastic structure arranged in the fifth type hinge structure may have the same or similar operation and structure as the fixed bracket (530), the first rotation member (510), the second rotation member (520), the shaft fixing portion (not shown), the cam member (560, 570), and the first elastic structure (110) described above in FIGS. 3 to 22. The first elastic member (2111), the second elastic member (2112), the third elastic member (2113), and the fourth elastic member (2114) included in the first elastic structure (2110) may have the same or similar operation and structure as the first elastic member (111), the second elastic member (112), the third elastic member (113), and the fourth elastic member (114) described above in FIGS. 3 to 22.

[0217] A first spiral rotation member (2411) included in a first arm member (2410) of a fifth type hinge structure may have a first spiral structure (2412) (or a first spiral pattern, a first spiral protrusion, a first spiral gear). The first spiral structure (2412) may be fastened to a first spiral hole (2721) formed in a linkage member (2590). The first spiral structure (2412) rotates in accordance with the rotation of the first spiral rotation member (2411) included in the first arm member (2410), and the linkage member (2590) in which the first spiral hole (2721) is formed in response to the rotation of the first spiral structure (2412) may move linearly in the y-axis direction (or in a direction parallel to the direction in which the first display (230) is folded).

[0218] A second spiral structure (2422) (or a second spiral pattern, a second spiral protrusion, a second spiral gear) may be arranged on a second spiral rotation member (2421) included in a second arm member (2420). The second spiral structure (2422) may be fastened to a second spiral hole (2722) formed in a linkage member (2590). The second spiral structure (2422) rotates according to the rotation of the second arm member (2420), and the linkage member (2590) in which the second spiral hole (2722) is formed in response to the rotation of the second spiral structure (2422) may move linearly in the y-axis direction (or in a direction parallel to the direction in which the first display (230) is folded).

[0219] The friction structure (1801) may include a first friction member (1700), a second friction member (1800), and a support member (1900). The first friction member (1700) included in the friction structure (1801) corresponds to the first friction member (700) described in FIGS. 3 to 22, the second friction member (1800) corresponds to the second friction member (800) described in FIGS. 3 to 22, and the support member (1900) corresponds to the support member (900) described in FIGS. 3 to 22. Accordingly, a description of the detailed structure of the friction structure (1801) including the first friction member (1700), the second friction member (1800), and the support member (1900) will be replaced with the description of the structure of the friction structure (801) described in FIGS. 3 to 22.

[0220] In one embodiment, a foldable electronic device can secure the frictional force required to maintain an angle in a flex operation through cylindrical frictional force and rotational frictional force even when the size of the cam member is reduced during the process of implementing a slim foldable electronic device, thereby reducing the frictional force due to the cam operation. In addition, in one embodiment, a foldable electronic device can implement a reduction in the number of parts and a slimmer body by combining the linkage member with a spiral structure included in the arm member.

[0221] Although the spiral rotation member (2411, 2421) of the foldable electronic device according to one embodiment has been described as having a structure included in the arm member (2410, 2420), the spiral rotation member (2411, 2421) may also be formed as a structure separate from the arm member (2410, 2420).

[0222] According to one embodiment, the first spiral rotation member (2411) may be connected or coupled to a first housing (e.g., the first housing (210) of FIGS. 1A and 1B), and the second spiral rotation member (2421) may be connected (or coupled) to a second housing (e.g., the second housing (220) of FIGS. 1A and 1B). For example, the first spiral rotation member (2411) may rotate together with the first housing about a first rotation axis (2711), and the second spiral rotation member (2421) may rotate together with the second housing about a second rotation axis (2712). The first spiral rotation member (2411) and / or the second spiral rotation member (2421) may rotate while in surface contact with the linkage member (2590). In one embodiment, the interlocking member (2590) may not be directly coupled to the first housing and / or the second housing.

[0223] According to one embodiment, the linkage member (2590) may include a first linkage member (2591) that accommodates a first spiral structure (2412) of a first helical rotation member (2411) and a second linkage member (2592) that accommodates a second spiral structure (2422) of a second helical rotation member (2421).

[0224] According to one embodiment, the first linkage member (2591) may include a first spiral hole (2721) for accommodating at least a portion of the first spiral structure (2412). The first spiral hole (2721) may be a spiral-shaped hole formed around the first rotational axis (2711). The first linkage member (2591) may include a first linkage surface (2731) forming at least a portion of the first spiral hole (2721), and a second linkage surface (2732) forming at least a portion of the first spiral hole (2721) and being substantially parallel to the first linkage surface (2731).

[0225] According to one embodiment, the second linkage member (2592) may include a second spiral hole (2722) for accommodating at least a portion of the second spiral structure (2422). The second spiral hole (2722) may be a spiral-shaped hole formed around the second rotation axis (2712). The second linkage member (2592) may include a third linkage surface (2741) forming at least a portion of the second spiral hole (2722), and a fourth linkage surface (2742) forming at least a portion of the second spiral hole (2722) and being substantially parallel to the third linkage surface (2741).

[0226] According to one embodiment, in the unfolded state of the hinge structure, the first spiral structure (2412) may be disposed within the first spiral hole (2721), and the second spiral structure (2422) may be disposed within the second spiral hole (2722). In the folded state of the hinge structure, a part of the first spiral structure (2412) may be disposed within the first spiral hole (2721), and a remaining part of the first spiral structure (2412) may be exposed (or disposed) to the outside of the first spiral hole (2721). In the folded state of the hinge structure, a part of the second spiral structure (2422) may be disposed within the second spiral hole (2722), and a remaining part of the second spiral structure (2422) may be exposed (or disposed) to the outside of the second spiral hole (2722).

[0227] According to one embodiment, the hinge structure can be interlocked without a gear structure by using a first spiral rotation member (2411), a second spiral rotation member (2421), and an interlocking member (2590). According to one embodiment, since the hinge structure does not include a gear structure, the hinge structure can be slimmed down.

[0228] Figures 28a, 28b and 28c are drawings for explaining the sliding movement of the linkage member according to one embodiment. In Figure 28a, <2801> is a cross-sectional view showing a hinge structure of a foldable electronic device in an unfolded state according to an embodiment of the present invention; <2802> is a front view showing a hinge structure of a foldable electronic device in an unfolded state according to one embodiment. In FIG. 28b, <2803> is a cross-sectional view showing a hinge structure in an intermediate state of a first angle of a foldable electronic device according to an embodiment of the present invention; <2804> is a front view of a foldable electronic device according to one embodiment showing a hinge structure in an intermediate state of a first angle. In FIG. 28c, <2805> is a cross-sectional view showing a hinge structure of a foldable electronic device in a folded state according to one embodiment; <2806> is a front view showing a hinge structure of a foldable electronic device according to one embodiment in a folded state.

[0229] Referring to FIGS. 26 to 28c, according to one embodiment, the hinge structure may include an unfolded state as shown in FIG. 28a, an intermediate state (or an intermediate state at the first angle) as shown in FIG. 28b, and a folded state as shown in FIG. 28c, as the first spiral rotation member (2411) and the second spiral rotation member (2421) are rotated about the first rotation axis (2711) and the second rotation axis (2712), respectively.

[0230] According to one embodiment, the first helical rotation member (2411), the second helical rotation member (2421), and / or the linkage member (2590) can perform a helical linkage motion. The helical linkage motion can be interpreted as a motion in which a rotational motion and a linear (sliding) motion are mutually converted. For example, when the first spiral rotation member (2411) and / or the second spiral rotation member (2421) rotates, the first spiral rotation member (2411) and / or the second spiral rotation member (2421) may transmit a first force (F1) to the first linkage surface (2731), the second linkage surface (2732), the third linkage surface (2741), and / or the fourth linkage surface (2742) of the linkage member (2590), and the first linkage surface (2731), the second linkage surface (2732), the third linkage surface (2741), and / or the fourth linkage surface (2742) of the linkage member (2590) may transmit a second force (F2) to the first spiral rotation member (2411) and / or the second spiral rotation member (2421). The second force (F2) may be a repulsive force of the first force (F1). The first force (F1) and the second force (F2) may be added together and changed into a third force (F3) acting on the first spiral rotating member (2411), a fourth force (F4) acting on the second spiral rotating member (2421), and a fifth force (F5) acting on the linkage member (2590). The magnitude of the sum of the third force (F3) and the fourth force (F4) may be substantially equal to the magnitude of the fifth force (F5).

[0231] According to one embodiment, the linkage member (2590) can slide in the longitudinal direction (e.g., Y-axis direction) of the linkage member (2590). For example, the linkage member (2590) can slide by using a force (e.g., a fifth force (F5)) applied to the linkage member (2590) by rotating the first spiral rotation member (2411) connected to the first housing and / or the second spiral rotation member (2421) connected to the second housing. The linkage member (2590) can slide relative to the first housing and / or the second housing.

[0232] According to one embodiment, in the unfolded state of the hinge structure as illustrated in FIG. 28a, one end of the linkage member (2590) may be positioned on a virtual first reference line (2821), and the other end of the linkage member (2590) may be positioned on a virtual second reference line (2822) spaced apart in the y-axis direction based on the first reference line (2821).

[0233] According to one embodiment, when the hinge structure is converted from an unfolded state to an intermediate state as illustrated in FIG. 28b, the linkage member (2590) can move linearly in the y-axis direction by a first specified length (h1). For example, in the intermediate state of the hinge structure, one end of the linkage member (2590) can be positioned at a virtual first reference line (2821), and the other end of the linkage member (2590) can be positioned at a point moved by a specified length (h1) from a second reference line (2822).

[0234] According to one embodiment, when the hinge structure is converted from an unfolded state to a folded state as illustrated in FIG. 28c, the linkage member (2590) can move linearly in the y-axis direction by a specified second length (h2) (h2>h1). For example, in the folded state of the hinge structure, one end of the linkage member (2590) can be positioned at a virtual first reference line (2821), and the other end of the linkage member (2590) can be positioned at a point moved by a specified second length (h2) from a second reference line (2822).

[0235] FIG. 29 is a drawing showing a rotation member and a spiral rotation member included in a hinge structure according to one embodiment.

[0236] Referring to FIG. 29, according to one embodiment, the first spiral rotation member (2411) and the second spiral rotation member (2421) may not have any rotational restrictions. Unlike the sliding linkage member (2590), the sliding movements of the first spiral rotation member (2411) and the second spiral rotation member (2421) may be reduced or restricted. Since the first spiral rotation member (2411) is coupled to the first housing (e.g., the first housing (210) of FIGS. 1A and 1B), the movement of the first spiral rotation member (2411) in the linear direction (e.g., the Y-axis direction) may be restricted or reduced. Since the second spiral rotation member (2421) is coupled to the second housing (e.g., the second housing (220) of FIGS. 1A and 1B), the movement of the second spiral rotation member (2421) in the linear direction (e.g., the Y-axis direction) may be restricted or reduced.

[0237] According to one embodiment, the first spiral rotation member (2411) and the first spiral rotation member (510) may be connected. The first spiral rotation member (510) may be fixed to the first housing that rotates and may rotate, so that there may be a rotational degree of freedom. The first spiral rotation member (2411) may rotate in response to the rotation of the first rotation member (510), so that there may be a rotational degree of freedom. Since the first spiral rotation member (510) and the first spiral rotation member (2411) are fixed to the first housing, there may be no degree of freedom for linear movement (e.g., along the y-axis).

[0238] According to one embodiment, the second spiral rotation member (2421) and the second rotation member (520) may be connected. The second rotation member (520) may be fixed to the second housing that rotates and may rotate, so that there may be a rotational degree of freedom. The second spiral rotation member (2421) may rotate in response to the rotation of the second rotation member (520), so that there may be a rotational degree of freedom. Since the second rotation member (520) and the first spiral rotation member (2411) are fixed to the first housing, there may be no degree of freedom for movement in a linear direction (e.g., in the y-axis direction).

[0239] FIG. 30 is a drawing showing a part of a sixth type of hinge structure according to one embodiment.

[0240] Referring to FIG. 30, a sixth type of hinge structure according to one embodiment may include a fixed bracket (530), a first rotation member (510), a second rotation member (520), a first arm member (410), a second arm member (420), a shaft fixing portion (270), a friction structure (801), a cam member (560, 570), a first elastic structure (110), and a second elastic structure (120). The fixed bracket (530), the first rotating member (510), the second rotating member (520), the shaft fixing portion (270), the cam member (560, 570), the first elastic structure (110), and the second elastic structure (120) arranged in the seventh type hinge structure may have the same or similar operation and structure as the fixed bracket (530), the first rotating member (510), the second rotating member (520), the shaft fixing portion (270), the cam member (560, 570), the first elastic structure (110), and the second elastic structure (120) described above in FIGS. 3 to 22.

[0241] A sixth type of hinge structure according to one embodiment may include a gear member (3010) separated from a first arm member (410) and a second arm member (420). The gear member (3010) may include a first main gear (or first gear) (3171), a second main gear (or second gear) (3172), a first linkage gear (or third gear) (3173), and a second linkage gear (or fourth gear) (3174).

[0242] The first main gear (3171) and the second main gear (3172) may be disposed separately from the arm member (410, 420). The first main gear (3171), the first linkage gear (3173), the second linkage gear (3174), and the second main gear (3172) may be gear-connected to each other. The first linkage gear (3173) and the second linkage gear (3174) may be gear-coupled. A gear bracket (3020) may be disposed between each of the first linkage gear (3173) and the second linkage gear (3174) and the first cam member (560). The gear bracket (3020) may include holes through which a third shaft (e.g., the third shaft (133) of FIG. 5) and a fourth shaft (e.g., the fourth shaft (134) of FIG. 5) pass and are mounted, and mounting holes through which one side of at least one linkage gear (3173, 3174) is mounted.

[0243] FIG. 31 is a drawing showing a part of a seventh type hinge structure according to one embodiment. FIG. 32 is a drawing showing a female member included in a seventh type hinge structure according to one embodiment. In FIG. 32, <3201> is a perspective view showing a female member included in the hinge structure of the seventh type. <3202> is a cross-sectional view of the female member included in the 7th type hinge structure viewed from the z-axis. <3203> is a cross-sectional view of the female member included in the 7th type hinge structure viewed from the x-axis. <3204> is a cross-sectional view of a female member included in a hinge structure of the 7th type, viewed from the y-axis.

[0244] Referring to FIGS. 31 and 32, a seventh type of hinge structure according to one embodiment may include a fixed bracket (530), a first rotation member (510), a second rotation member (520), a first arm member (410), a second arm member (420), a shaft fixing portion (270), a friction structure (801), a cam member (560, 570), a first elastic structure (110), and a second elastic structure (120). The fixed bracket (530), the first rotating member (510), the second rotating member (520), the shaft fixing portion (270), the cam member (560, 570), the first elastic structure (110), and the second elastic structure (120) arranged in the seventh type hinge structure may have the same or similar operation and structure as the fixed bracket (530), the first rotating member (510), the second rotating member (520), the shaft fixing portion (270), the cam member (560, 570), the first elastic structure (110), and the second elastic structure (120) described above in FIGS. 3 to 22.

[0245] A first arm member (410) included in a seventh type hinge structure may include a first arm body (414), a first arm portion (411), a second arm portion (412), a first slide portion (413), and a first arm protrusion (3310). A second arm member (420) included in a seventh type hinge structure may include a second arm body (424), a third arm portion (421), a fourth arm portion (422), a second slide portion (423), and a second arm protrusion (3320). The first arm body (414), the first arm part (411), the second arm part (412), the first slide part (413), the second arm body (424), the third arm part (421), the fourth arm part (422), and the second slide part (423) included in the seventh type hinge structure may have the same or similar operation and structure as the first arm body (414), the first arm part (411), the second arm part (412), the first slide part (413), the second arm body (424), the third arm part (421), the fourth arm part (422), and the second slide part (423) described above in FIGS. 3 to 22.

[0246] According to one embodiment, the first arm protrusion (3310) included in the seventh type hinge structure may be formed on the first outer peripheral surface of the first arm portion (411). The first arm protrusion (3310) may be formed to be long in the first arm portion (411) so as to be parallel to the first main gear (171). The first arm protrusion (3310) may protrude from a portion of the first outer peripheral surface (435) of the first arm portion (411) toward the first friction member (700). The first arm protrusion (3310) may protrude in a direction opposite to the extension direction of the first slide portion (413). Since the second arm protrusion (3320) may correspond to the first arm protrusion (3310), the description of the detailed structure of the second arm protrusion (3320) will be replaced with the description of the structure of the first arm protrusion (3310).

[0247] Fig. 33 is a drawing showing the arrangement of the arm member and the friction member in the unfolded state of the seventh type of hinge structure according to one embodiment. In Fig. 33, <3301> is a perspective view showing the arrangement of the arm member and the friction member in the unfolded state of the hinge structure. <3302> is a cross-sectional view showing the arrangement of the arm member and the friction member in the unfolded state of the hinge structure.

[0248] Referring to FIGS. 31, 32, and 33, in the unfolded state of the hinge structure, the first female projection (3310) contacts one end of the first friction member (700) (e.g., an edge contacting one end of the first outer curved surface (751)), and the second female projection (3320) contacts one end of the second friction member (800) (e.g., an edge contacting one end of the second outer curved surface (851)), so that the hinge structure can be prevented from being folded. For example, in a state where the first female projection (3310) is in contact with one end of the first friction member (700) and the second female projection (3320) is in contact with one end of the second friction member (800), a part of the first outer peripheral surface (435) of the first female member (410) may be in contact with the first outer curved surface (751) of the first friction member, and a part of the second outer peripheral surface (1435) of the second female member (420) may be in contact with the second outer curved surface (851) of the second friction member.

[0249] Fig. 34 is a drawing showing the arrangement of the arm member and the friction member in an intermediate state of the seventh type of hinge structure according to one embodiment. In Fig. 34, <3401> is a perspective view showing the arrangement of the arm member and the friction member in the intermediate state of the hinge structure. <3402> is a cross-sectional view showing the arrangement of the arm member and the friction member in an intermediate state of the hinge structure.

[0250] Referring to FIGS. 31, 32, and 34, in the operation of transitioning from the unfolded state of the hinge structure to the intermediate state, the first arm protrusion (3310) can move along the first outer curved surface (751) on the first outer curved surface (751) of the first friction member (700). The second arm protrusion (3320) can move along the second outer curved surface (851) on the second outer curved surface (851) of the second friction member (800). According to one embodiment, a maximum static friction force can be generated due to the contact between the first arm protrusion (3310) and the first outer curved surface (751) and the contact between the second arm protrusion (3320) and the second outer curved surface (851). By the maximum static friction as well as the rotational friction and the cylindrical friction, the hinge structure including the first arm member (410) and the second arm member (420) can maintain a state folded by the first angle in the intermediate state.

[0251] Fig. 35 is a drawing showing the arrangement of the arm member and the friction member in the folded state of the seventh type of hinge structure according to one embodiment. In Fig. 35, <3501> is a perspective view showing the arrangement of the arm member and the friction member in the folded state of the hinge structure. <3502> is a cross-sectional view showing the arrangement of the arm member and the friction member in the folded state of the hinge structure.

[0252] Referring to FIGS. 31, 32, and 35, in the folded state of the hinge structure, the first female projection (3310) contacts the other end of the first friction member (700) (e.g., the edge contacting the other end of the first outer curved surface (751)), and the second female projection (3320) contacts the other end of the second friction member (800) (e.g., the edge contacting the other end of the second outer curved surface (851)), so that the hinge structure can be prevented from unfolding. For example, when the first arm protrusion (3310) is in contact with the other end of the first friction member (700) and the second arm protrusion (3320) is in contact with the other end of the second friction member (800), a part of the first outer peripheral surface (435) of the first arm member (410) is in contact with the first outer curved surface (751) of the first friction member (700), and a part of the second outer peripheral surface (1435) of the second arm member (420) is in contact with the second outer curved surface (851) of the second friction member (800), thereby generating a cylindrical frictional force. By the cylindrical frictional force and the rotational frictional force of the arm members (410, 420), the hinge structure including the first arm member (410) and the second arm member (420) can maintain a folded state.

[0253] Fig. 36 is a drawing showing a part of a hinge structure of type 8 according to one embodiment. In Fig. 36, <3701> is a drawing showing the unfolded state of the hinge structure, <3702> is a drawing showing a folded state of a hinge structure. FIG. 37 is a drawing showing an arm member included in an 8th type hinge structure according to one embodiment, and FIG. 38 is a drawing showing a friction structure included in an 8th type hinge structure according to one embodiment. In FIG. 38, <3801> is a perspective view showing a friction structure included in the hinge structure of the 8th type. <3802> is a plan view of the female member included in the hinge structure of the 8th type as viewed from the z-axis.

[0254] Referring to FIGS. 36, 37, and 38, the friction structure (5801) and the arm members (5410, 5420) of the eighth type hinge structure according to one embodiment may correspond to at least one of the respective components of the first to seventh type hinge structures described above. Accordingly, specific descriptions of the remaining components, excluding the structures related to the friction structure (5801) and the arm members (5410, 5420), may be replaced with the descriptions in FIGS. 1 to 22.

[0255] An eighth type hinge structure according to one embodiment may include a friction structure (5801), a first arm member (5410), and a second arm member (5420). The first arm member (5410) may include a first arm body (5414), a first arm portion (5411), a second arm portion (5412), and a first slide portion (5413). The second arm member (5420) included in the eighth type hinge structure may include a second arm body (5424), a third arm portion (5421), a fourth arm portion (5422), and a second slide portion (5423). The first arm body (5414), the first arm portion (5411), the second arm portion (5412), the first slide portion (5413), the second arm body (5424), the third arm portion (5421), the fourth arm portion (5422), and the second slide portion (5423) included in the eighth type hinge structure may have the same or similar operation and structure as the first arm body (414), the first arm portion (411), the second arm portion (412), the first slide portion (413), the second arm body (424), the third arm portion (421), the fourth arm portion (422), and the second slide portion (423) described above in FIGS. 3 to 22.

[0256] According to one embodiment, a friction structure (5801) included in the eighth type hinge structure may include a first friction member (5700), a second friction member (5800), and a support member (5900).

[0257] The first friction member (5700) may include a first outer body (5713) (or first body), a first outer portion (5711), and a second outer portion (5712).

[0258] The first outer portion (5711) may protrude from the first outer body (5713) in the -x-axis direction toward the first arm member (5410). The first outer portion (5711) may be formed in a ring shape surrounding the first outer hole (5741). A first shaft (131) may be inserted into the first outer hole (5741). A first outer surface (5731) of the first outer portion (5711) (e.g., a surface facing the -y-axis) may face (or contact) the first arm portion (5411) of the first arm member (5410). One surface of the first outer portion (5711) that faces the opposite direction to the first outer surface (5731) of the first outer portion (5711) (e.g., a surface facing the +y-axis) may be formed to support the first elastic member (5211). At least one first friction cam portion (5740) may be formed on the first outer surface (5731). The first friction cam portion (5740) may have mountain portions and valley portions repeatedly arranged in a state of protruding (or protruding) in the -y-axis direction. The top portion of the mountain portion of the first friction cam portion (5740) may be formed higher than the surrounding area (e.g., the valley portion), and the top portion may be formed flat. The first friction cam portion (5740) may be arranged to engage with the first cam structure (5440) formed on the first arm portion (5411) of the first arm member (5410). The first friction cam portion (5740) formed on the first outer portion (5711) comes into contact with the first cam structure (5440) formed on the first arm portion (5411) by the elastic force of the first elastic member (5211), and a frictional force may be generated between the first friction cam portion (5740) and the first cam structure (5440).

[0259] The second outer portion (5712) may protrude from the first outer body (5713) in an opposite direction to the first outer portion (5711). The second outer portion (5712) may protrude from the first outer body (5713) in the +x-axis direction toward the support member (5900) and / or the second friction member (5800). The second outer portion (5712) may be formed in a ring shape surrounding the second outer hole (5714) into which the third shaft (133) is inserted.

[0260] The first outer body (5713) may be positioned between the first outer portion (5711) and the second outer portion (5712). The contact area between the first outer body (5713) and the first female portion (5411) may be formed to be larger than the contact area between the first outer surface (5731) of the first outer portion (5711) and the first female portion (5411).

[0261] At least a portion of the first outer body (5713) may be formed to surround a portion of the support member (5900). For example, a portion of the first outer body (5713) may include at least one outer sloped surface (5761, 5762) that faces (or contacts) at least one inner sloped surface. For example, the first outer body (5713) may include a first outer sloped surface (5761), a second outer sloped surface (5762), and a fifth outer sloped surface (5763). For example, the first outer sloped surface (5761) and the second outer sloped surface (5762) may be formed to be inclined at the same angle or different angles. For example, the first outer body (5713) may include the fifth outer sloped surface (5763) without the first outer sloped surface (5761) and the second outer sloped surface (5762). The fifth outer inclined surface (5763) that can contact the fifth inner inclined surface (5963) of the support member (5900) can transfer the elastic force of the elastic member (5210) to the first outer curved surface (5751) (or the first curved surface) of the first friction member (5700). The fifth outer inclined surface (5763) can convert the elastic force of the elastic member (5210) in a direction toward the first outer curved surface (5751) and transfer it to the first outer curved surface (5751).

[0262] At least a portion of the first outer body (5713) may have a shape corresponding to that of the first arm portion (5411) of the first arm member (5410). For example, a portion of the first outer body (5713) may include a first outer curved surface (5751) surrounding a portion of the first arm portion (5411) having a hollow cylindrical shape at the center. The first outer curved surface (5751) of the first outer portion (5711) may generate friction when it comes into contact with the first arm portion (5411) of the first arm portion (5411) by the elastic force of the elastic member (5210).

[0263] According to one embodiment, the second friction member (5800) may be disposed to penetrate the second shaft (132) and the fourth shaft (134). The second friction member (5800) may be disposed between the third arm portion (5421) of the second arm member (5420) and the support member (5900) to contact at least a portion of each of the third arm portion (5421) of the second arm member (5420) and the support member (5900).

[0264] According to one embodiment, the second friction member (5800) may be formed to be symmetrical with the first friction member (5700) with respect to the y-axis (or with the support member (5900) therebetween). The second friction member (5800) may include a configuration identical to, corresponding to, or similar to the first friction member (5700). For example, the second friction member (5800) may include a second outer body (5813) (or second body), a third outer portion (5811), and a fourth outer portion (5812). The second outer body (5813) including the third outer slope (5861), the fourth outer slope (5862), the sixth outer slope (5863) and the second outer curved surface (5851) may correspond to the first outer body (5713) including the first outer slope (5761) and the second outer slope (5762) and the first outer curved surface (5751), and the third outer part (5811) including the second friction cam part (5840), the third outer hole (5841) and the second outer surface (5831) may correspond to the first outer part (5711) including the first friction cam part (5740), the first outer hole (5741) and the first outer surface (5731). The fourth outer portion (5812) including the fourth outer hole (5814) may correspond to the second outer portion (5712) including the second outer hole (5714). Accordingly, the detailed structure description of the second friction member (5800) will be replaced with the structure description of the first friction member (5700).

[0265] According to one embodiment, the support member (5900) may be arranged to be surrounded by the elastic structure (5210), the first friction member (5700), and the second friction member (5800). The support member (5900) may be arranged to penetrate the third shaft (133) and the fourth shaft (134). The support member (5900) may include a seating portion (5916), a first inner portion (5915), a second inner portion (5914), and a third inner portion (5913).

[0266] The settling portion (5913) may be formed to face (or contact, settling) the third elastic member (5213) and the fourth elastic member (5214). The settling portion (5913) may have a 37th length (3N) in the x-axis direction and a 35th length (3L) in the y-axis direction. The 37th length (3N) may have a length corresponding to the number of elastic members (5210) arranged in the settling portion (5916). For example, the 37th length (3N) may be a length corresponding to the sum of the diameter of the third elastic member (5213) and the diameter of the fourth elastic member (5214). The 35th length (3L) may be formed to have a minimum thickness corresponding to the minimum stiffness of the support member (5900). The 35th length (3L) can be formed thinner than the first outer portion (5711) of the first friction member (5700) and the third outer portion (5811) of the second friction member (5800).

[0267] The first inner portion (5915) may extend in the -y-axis direction from the securing portion (5916), and may be formed to have a shorter length in the x-axis direction than the securing portion (5916). The first inner portion (5915) may face (or contact) a part of the first outer body (5713) of the first friction member (5700) in the -x-axis direction, and may face (or contact) a part of the second outer body (5813) of the second friction member (5800) in the +x-axis direction. A first inner inclined surface (5961) and a third inner inclined surface (5971) may be formed between the first inner portion (5915) and the securing portion (5916). For example, the first inner inclined surface (5961) and the third inner inclined surface (5971) may be formed symmetrically with respect to the y-axis. The first inner inclined surface (5961) may face the first outer inclined surface (5761) of the first friction member (5700), and the third inner inclined surface (5971) may face the third outer inclined surface (5861) of the second friction member (5800). The first inner portion (5915) may have a 36th length (3M) in the x-axis direction and a 34th length (3K) in the y-axis direction. The 36th length (3M) may be formed to be smaller than the 37th length (3N) and larger than the 31st length (3H). The 36th length (3M) may correspond to a distance between a central axis of the third elastic member (5213) and a central axis of the fourth elastic member (5214). The 36th length (3M) may be equal to or similar to a diameter of either of the third elastic member (5213) and the fourth elastic member (5214). The 34th length (3K) may be formed to be greater than the height (or y-axis length) of the first friction cam portion (5740) and / or the second friction cam portion (5840). For example, the 34th length (3K) may be formed to be a length corresponding to the sum of the height (or y-axis length) of the first friction cam portion (5740) and / or the second friction cam portion (5840) and the minimum thickness corresponding to the minimum rigidity of the support member (5900).

[0268] The second inner portion (5914) may extend in the -y-axis direction from the first inner portion (5915). The second inner portion (5914) may be disposed between the first inner portion (5915) and the third inner portion (5913). The length of the second inner portion (5914) in the x-axis direction may gradually decrease as it goes toward the third inner portion (5913). The second inner portion (5914) may include a fifth inner slope (5963) facing (or in contact with) the fifth outer slope (5763) of the first friction member (5700), and a sixth inner slope (5973) facing (or in contact with) the sixth outer slope (5863) of the second friction member (5800). The slope length (or area) of the fifth inner slope (5963) may be formed to be greater than those of the first inner slope (5961) and the second inner slope (5962). The angle formed between the fifth inner slope (5963) and a virtual plane extending in the y-axis direction may be formed to be smaller than the angle formed between the first inner slope (5961) and the second inner slope (5962) and a virtual plane extending in the y-axis direction. The slope length (or area) of the sixth inner slope (5973) may be formed to be greater than those of the third inner slope (5971) and the fourth inner slope (5972). The angle formed by the sixth inner slope (5973) and the virtual plane extending in the y-axis direction may be smaller than the angle formed by the third inner slope (5971) and the fourth inner slope (5972) and the virtual plane extending in the y-axis direction, respectively. The distance between the fifth inner slope (5963) and the fifth outer slope (5763) may be shorter than the distance between the first inner slope (5961) and the first outer slope (5761) and / or the distance between the second inner slope (5962) and the second outer slope (5762). The distance between the fifth inner slope (5963) and the fifth outer slope (5763) may be 0.When the support member (5900) presses the first friction member (5700) based on the elastic force of the elastic member (5210) (e.g., the third elastic member (5213), the contact between the fifth inner slope (5963) and the fifth outer slope (5763) may be preferentially made over the contact between the first inner slope (5961) and the first outer slope (5761) and / or the contact between the second inner slope (5962) and the second outer slope (5762). The separation distance between the sixth inner slope (5973) and the sixth outer slope (5863) may be shorter than the separation distance between the third inner slope (5971) and the third outer slope (5861) and / or the separation distance between the fourth inner slope (5972) and the fourth outer slope (5862). The sixth inner The separation distance between the inclined surface (5973) and the sixth outer inclined surface (5863) may be 0. When the support member (5900) presses the second friction member (5800) based on the elastic force of the elastic member (5210) (e.g., the fourth elastic member (5214), the contact between the sixth inner inclined surface (5973) and the sixth outer inclined surface (5863) may be preferentially made over the contact between the third inner inclined surface (5971) and the third outer inclined surface (5861) and / or the contact between the fourth inner inclined surface (5972) and the fourth outer inclined surface (5862) and the first inner inclined surface (5961) and the first outer inclined surface (5761). According to one embodiment, the second inner portion (5914) may have a 33rd length (3J) in the y-axis direction. The 33rd length (3J) may be 5 It can be formed based on the slope length of the inner slope (5963) and the sixth inner slope (5973). The 33rd length (3J) can be formed in proportion to the target friction area between the first friction member (5700) and the first arm member (5410) and / or the target friction area between the second friction member (5800) and the second arm member (5420).The 33rd length (3J) is formed to be larger than the 32nd length (3I) and / or the 35th length (3L), thereby ensuring a large contact area (or friction area) between each of the first friction member (5700) and the second friction member (5800) and the support member (5900).

[0269] The third inner portion (5913) may extend from the second inner portion (5914) in the -y-axis direction, and may be formed to have a shorter length in the x-axis direction than the first inner portion (5915). The third inner portion (5913) may face (or be spaced apart from, contact) a part of the second outer portion (5712) of the first friction member (5700) in the y-axis direction, and may face (or be spaced apart from, contact) a part of the fourth outer portion (5812) of the second friction member (5800) in the y-axis direction. A second inner slope (5962) and a fourth inner slope (5972) may be formed on the third inner portion (5913). For example, the second inner slope (5962) and the fourth inner slope (5972) may be formed symmetrically with respect to the y-axis. The second inner slope (5962) may face the second outer slope (5762) of the first friction member (5700), and the fourth inner slope (5972) may face the fourth outer slope (5862) of the second friction member (5800). According to one embodiment, the third inner portion (5913) may have a thirty-first length (3H) in the x-axis direction and a thirty-second length (3I) in the y-axis direction. The thirty-first length (3H) may be formed to be greater than the thirty-second length (3I). The thirty-first length (3H) may be smaller than the thirty-sixth length (3M) and the thirty-seventh length (3N) based on the slopes of the fifth inner slope (5963) and the sixth inner slope (5973), respectively. For example, the 31st length (3H) may correspond to the 36th length (3M) minus the x-axis length corresponding to the slope of the 5th inner slope (5963) and the x-axis length corresponding to the slope of the 6th inner slope (5973). The 32nd length (3I) may be formed to be smaller than the 31st length (3H). The 32nd length (3I) may be formed to be equal to or similar to the 35th length (3L) of the mounting portion (5916).

[0270] According to one embodiment, before, during, and / or after the first friction member (5700) and / or the second friction member (5800) are pressed by the support member (5900), the seating portion (5916) of the support member (5900) can be spaced apart from each of the first friction member (5700) and the second friction member (5800) by a first gap (G1). Before, during, and / or after the first friction member (5700) and / or the second friction member (5800) is pressed by the support member (5900), the third inner portion (5913) of the support member (5900) can be spaced apart from the first friction member (5700) (e.g., the second outer portion (5712)) and / or the second friction member (5800) (e.g., the fourth outer portion (5812)) by a second gap (G2). The second gap (G2) can be the same as or different from the first gap (G1). According to one embodiment, when the support member (5900) presses the first friction member (5700) and the second friction member (5800) based on the elasticity of the elastic member (5210) (e.g., the third elastic member (5213) and the fourth elastic member (5214)), the contact between the fifth inner inclined surface (5963) and the fifth outer inclined surface (5763) and / or the contact between the sixth inner inclined surface (5973) and the sixth outer inclined surface (5863) may be preferentially made over the contact between each of the first friction member (5700) and the second friction member (5800) and the seating portion (5916) and / or the contact between each of the first friction member (5700) and the second friction member (5800) and the third inner portion (5913).

[0271] An electronic device according to one embodiment includes a plurality of hinge structures, such that the display can be folded at least once. An embodiment in which the display can be folded multiple times will be described below as an example.

[0272] FIG. 39a is a drawing showing an unfolded state (or first state) of an electronic device according to one embodiment, and FIG. 39b is a drawing showing a folded state (or second state) of an electronic device according to one embodiment.

[0273] Referring to FIGS. 39A and 39B , an electronic device according to one embodiment may include a first housing (3610), a second housing (3620), and a third housing (3630). As an example, the first housing (3610), the second housing (3620), and the third housing (3630) may be configured as a foldable housing (e.g., a housing structure).

[0274] According to one embodiment, the foldable housing may include a first hinge (3601) and a second hinge (3602) that foldably interconnect a first housing (3610), a second housing (3620), and a third housing (3630). The first hinge (3601) may be disposed between the first housing (3610) and the second housing (3620) to foldably interconnect the first housing (3610) and the second housing (3620). The second hinge (3602) may be disposed between the first housing (3610) and the third housing (3630) to foldably interconnect the first housing (3610) and the third housing (3630).

[0275] According to one embodiment, the first hinge (3601) and the second hinge (3602) can be folded in the same or different manners. For example, each of the first hinge (3601) and the second hinge (3602) can be folded in an inward-fold manner (e.g., an inward-fold type) or an outward-fold manner. For example, one of the first hinge (3601) and the second hinge (3602) can be folded in an inward-fold manner (e.g., an inward-fold type), and the other of the first hinge (3601) and the second hinge (3602) can be folded in an outward-fold manner.

[0276] According to one embodiment, when the electronic device is in a fully unfolded state (e.g., an unfolded state or a first state), the first housing (3610), the second housing (3620), and the third housing (3630) can be operated such that they face substantially the same direction. According to one embodiment, when the electronic device is in a fully folded state (e.g., a folded state or a first state), the first housing (3610), the second housing (3620), and the third housing (3630) can be stacked in the z-axis direction.

[0277] According to one embodiment, the electronic device may include a display (3730) (e.g., a flexible display, a foldable display, or a main display) arranged to be supported by a first housing (3610), a second housing (3620), and a third housing (3630). The display (3730) may include a first region (3711), a second region (3712), and a third region (3713) divided based on a folding axis (F361, F362). For example, the first region (3711) and the second region (3712) may be divided based on the first folding axis (or the central axis of the first hinge (3601)) (F361). The first region (3711) and the third region (3713) can be divided based on the second folding axis (or the central axis of the second hinge (3602)) (F362). The first region (3711) may be a region that is positioned in the first housing (3610) and is not deformed. The second region (3712) may be a region that is positioned in the second housing (3620) and is not deformed. The third region (3713) may be a region that is positioned in the third housing (3630) and is not deformed.

[0278] According to one embodiment, the display (3730) may include a first folding area (3721) disposed between the first area (3711) and the second area (3712), and a second folding area (3722) disposed between the first area (3711) and the third area (3713). The first folding area (3721) and / or the second folding area (3722) may be deformed when the electronic device is converted to a folded state (or a second state). The first folding area (3721) may be disposed at a position at least partially overlapping the first hinge (3601). The first folding area (3721) may be deformed as the second housing (3620) rotates about the first folding axis (F361) with respect to the first housing (3610). The second folding region (3722) can be positioned at a position that at least partially overlaps the second hinge (3602). The second folding region (3722) can be deformed as the third housing (3630) rotates about the second folding axis (F362) with respect to the first housing (3610).

[0279] The first folding area (3721) may be formed to have the same or different areas as the second folding area (3722). For example, when the electronic device is converted to a folded state, if the curvature radii of the first folding area (3721) and the second folding area (3722) are the same or similar, the first folding area (3721) and the second folding area (3722) may be formed to have the same or similar areas. For example, when the electronic device is converted to a folded state, if the curvature radii of the first folding area (3721) and the second folding area (3722) are different, the first folding area (3721) and the second folding area (3722) may be formed to have different areas. For example, when the electronic device is converted into a folded state, if the first folding area (3721) is smaller than the radius of curvature of the second folding area (3722), the first folding area (3721) may be formed to have a smaller area than the second folding area (3722). When the electronic device is converted into a folded state, if the first folding area (3721) is smaller than the radius of curvature of the second folding area (3722), the width (e.g., x-axis length) of the second folding area (3722) may be formed to be longer than the width (e.g., x-axis length) of the first folding area (3721). When the first folding area (3721) is smaller than the radius of curvature of the second folding area (3722), the second width (WW) of the second hinge (3602) corresponding to the second folding area (3722) may be formed to be longer than the first width (NW) of the first hinge (3601) corresponding to the first folding area (3721).

[0280] According to one embodiment, while the electronic device changes from an unfolded state to a folded state, the second housing (3620) can rotate about a first folding axis (F361) with respect to the first housing (3610) via the first hinge (3601), and the third housing (3630) can rotate about a second folding axis (F362) with respect to the first housing (3610) via the second hinge (3602). According to one embodiment, when the first width (NW) of the first hinge (3601) is different from the second width (WW) of the second hinge (3602), the housing (3620, 3630) coupled with the hinge (3601, 3602) having a smaller width can rotate first. For example, since the first width (NW) of the first hinge (3601) is smaller than the second width (WW) of the second hinge (3602), the second housing (3620) can rotate about the first folding axis (F361) with respect to the first housing (3610) before the third housing (3630). The third housing (3630) can rotate about the second folding axis (F362) with respect to the first housing (3610) after the second housing (3620) has rotated.

[0281] According to one embodiment, the electronic device may have a display (3730) that can be folded multiple times through a plurality of hinges (3601, 3602) having different widths. Folding areas (3721, 3722) of the display that have different curvature changes corresponding to the plurality of hinges (3601, 3602) having different widths may be folded.

[0282] FIG. 40 is an exploded perspective view of at least a portion of an electronic device including a hinge according to one embodiment, and FIG. 41 is a drawing showing a plurality of housings equipped with hinges according to one embodiment.

[0283] Referring to FIGS. 39A, 39B, 40, and 41, the electronic device may include a plurality of hinges (3601, 3602) mounted on a plurality of housings (3610, 3620, 3630). The electronic device may include a first hinge (3601) disposed between a first housing (3610) and a second housing (3620), and a second hinge (3602) disposed between the first housing (3610) and a third housing (3630). Each of the first hinge (3601) and the second hinge (3602) may include at least one of a hinge housing (3750, 3850), a hinge structure (3640, 3640-, 3840, 3840-1), a center bar (3743, 3860), and a wing plate (3761, 3762, 3861, 3862). In one embodiment, the hinge (3601, 3602) may have at least one of the above components omitted, or one or more other components added. In one embodiment, some of the above components may be integrated into one component.

[0284] According to one embodiment, the first hinge (3601) may include a first hinge housing (3750), a first hinge structure (3640) and a second hinge structure (3640-1), a first center bar (3743), a first wing plate (3761), and a second wing plate (3762). The second hinge (3602) may include a second hinge housing (3850), a third hinge structure (3840) and a fourth hinge structure (3840-1), a second center bar (3860), a third wing plate (3861), and a fourth wing plate (3862).

[0285] According to one embodiment, the first hinge structure (3640) and the second hinge structure (3640-1) may be spaced apart from each other along a direction parallel to the first folding axis (F361) (e.g., y-axis direction). The first hinge structure (3640) and the second hinge structure (3640-1) may be spaced apart from each other between the first housing (3610) and the second housing (3620) so as not to be visible from the outside through the first hinge housing (3750) (e.g., hinge cover). The third hinge structure (3840) and the fourth hinge structure (3840-1) may be spaced apart from each other along a direction parallel to the second folding axis (F362) (e.g., y-axis direction). The third hinge structure (3840) and the fourth hinge structure (3840-1) may be positioned between the first housing (3610) and the third housing (3630) so as not to be visible from the outside through the second hinge housing (3850) (e.g., hinge cover).

[0286] According to one embodiment, a plurality of center bars (3743, 3860) (e.g., center bar (243) of FIG. 2) may be disposed between the display (3730) and the hinge structures (3640, 3640-1, 3840, 3840-1). The first center bar (3743) may be disposed to cover at least a portion of a central region of at least one of the first hinge structure (3640) and the second hinge structure (3640-1). The second center bar (3860) may be disposed to cover at least a portion of a central region of at least one of the third hinge structure (3840) and the fourth hinge structure (3840-1). As an example, the first center bar (3743) may be disposed to cover at least a portion of a central region of each of the first hinge structure (3640) and the second hinge structure (3640-1). The second center bar (3860) may be positioned to cover at least a portion of the center area of ​​the fourth hinge structure (3840-1). The first center bar (3743) may be fastened and fixed to at least one of the first hinge housing (3750) and the hinge structures (3640, 3640-1). The second center bar (3860) may be fastened and fixed to at least one of the second hinge housing (3850) and the fourth hinge structure (3840-1).

[0287] According to one embodiment, a plurality of wing plates (3761, 3762, 3861, 3862) (e.g., wing plates (261, 262) of FIG. 2) may be disposed between the display (3730) and a plurality of center bars (3743, 3860). The first wing plate (3761) and the second wing plate (3762) are disposed to cover at least a portion of the z-axis direction surfaces of the first hinge structure (3640) and the second hinge structure (3640-1) when the electronic device is in an unfolded state. The third wing plate (3861) and the fourth wing plate (3862) are disposed to cover at least a portion of the z-axis direction surfaces of the third hinge structure (3840) and the fourth hinge structure (3840-1) when the electronic device is in an unfolded state.

[0288] According to one embodiment, the first wing plate (3761) and the second wing plate (3762) may be arranged on both sides with the first center bar (3743) therebetween. The first wing plate (3761) and the second wing plate (3762) may support a flat surface of the first folding area (3721) of the display (3730) in a folded state of the electronic device. The third wing plate (3861) and the fourth wing plate (3862) may be arranged on both sides with the second center bar (3860) therebetween. The third wing plate (3861) and the fourth wing plate (3862) may support a flat surface of the second folding area (3722) of the display (3730) in a folded state of the electronic device.

[0289] According to one embodiment, the first hinge (3601) may be formed to have a different size from the second hinge (3602). The first hinge (3601) may be formed to have a first width (NW) (e.g., x-axis length), and the second hinge (3602) may be formed to have a second width (WW) (e.g., x-axis length) greater than the first width (NW). For example, the width of at least one of the hinge housing (3750), the hinge structure (3640, 3640-1), and the center bar (3743) included in the second hinge (3602) may be formed to be greater than the width of at least one of the hinge housing (3850), the hinge structure (3840, 3840-1), and the center bar (3860) included in the first hinge (3601). For example, the separation distance (e.g., x-axis length) of the first wing plate (3761) and the second wing plate (3762) included in the second hinge (3602) may be formed to be greater than the separation distance (e.g., x-axis length) of the third wing plate (3861) and the fourth wing plate (3862) included in the first hinge (3601).

[0290] According to one embodiment, the electronic device may be folded multiple times in a folded state, with the display (3730) being folded multiple times via the first hinge (3601) and the second hinge (3602). In the folded state, a second folding area (3722) of the display (3730) corresponding to the second hinge (3602) may be folded to have a larger radius of curvature than a first folding area (3721) of the display (3730) corresponding to the first hinge (3601).

[0291] FIG. 42 is a drawing showing a hinge structure included in a first hinge and a hinge structure included in a second hinge according to one embodiment. In FIG. 42, <3901> is a drawing showing at least one of a first hinge structure (e.g., the first hinge structure (3640) of FIG. 37) and a second hinge structure (e.g., the second hinge structure (3640-1) of FIG. 37) included in a first hinge (e.g., the first hinge (3601) of FIGS. 39a to 41), <3902> is a drawing showing at least one of a third hinge structure (e.g., a third hinge structure (3840) of FIG. 37) and a fourth hinge structure (e.g., a fourth hinge structure (3840-1) of FIG. 37) included in a second hinge (e.g., a second hinge (3602) of FIGS. 36a to 38).

[0292] Referring to FIGS. 39A to 42, according to one embodiment, each of the first hinge structure (3640), the second hinge structure (3640-1), the third hinge structure (3840), and the fourth hinge structure (3840-1) may include a configuration corresponding to any one of the hinge structures of the first to eighth types of the embodiments described above. For example, each of the first hinge structure (3640), the second hinge structure (3640-1), the third hinge structure (3840), and the fourth hinge structure (3840-1) may include a fixed bracket, a linkage gear (173, 4173), a first rotation member (510, 4510), a second rotation member (520, 4520), a first arm member (410, 4410), a second arm member (420, 4420), a shaft fixing portion (270, 4270), a friction structure (801, 4801), a cam member (560, 570, 4560, 4570), a first elastic structure (110, 4110), and a second elastic structure (120, 4120). Each of the friction structures (801, 4801) may include a first friction member (700, 4700), a second friction member (800, 4800), and a support member (900, 4900).

[0293] According to one embodiment, the fixed bracket, the interlocking gear (173, 4173), the first rotating member (510, 4510), the second rotating member (520, 4520), the first arm member (410, 4410), the second arm member (420, 4420), the shaft fixing part (270, 4270), the friction structure (801, 4801), the cam member (560, 570, 4560, 4570), the first elastic structure (110, 4110) and the second elastic structure (120, 4120) included in each of the hinge structures (3640, 3640-1, 3840, 3840-1) are the fixed bracket (530), the interlocking gear (173), the first rotating member (510), the second rotating member (520), the shaft fixing part (270), the cam, as described above in FIGS. 3 to 35. Absence (560, 570), first elastic structure (110), and second elastic structure (120) may have the same or similar operation and structure.

[0294] According to one embodiment, the first hinge structure (3640) and the second hinge structure (3640-1) included in the first hinge (3601) may be arranged to correspond to the first folding area (3721) of the display (3730). The third hinge structure (3840) and the fourth hinge structure (3840-1) included in the second hinge (3602) may be arranged to correspond to the second folding area (3722) of the display (3730).

[0295] According to one embodiment, at least one of the first hinge structure (3640) and the second hinge structure (3640-1) overlapping the first folding area (3721) may be formed to have a width (W1) corresponding to the first width (NW) of the first hinge (3601). At least one of the third hinge structure (3840) and the fourth hinge structure (3840-1) overlapping the second folding area (3722) may be formed to have a width (W2) corresponding to the second width (WW) of the second hinge (3602). The width (W2) of at least one of the third hinge structure (3840) and the fourth hinge structure (3840-1) may be formed to be larger than the width (W1) of at least one of the first hinge structure (3640) and the second hinge structure (3640-1).

[0296] According to one embodiment, at least one of the fixed bracket, the interlocking gear (173), the first rotating member (510), the second rotating member (520), the first arm member (410), the second arm member (420), the shaft fixing portion (270), the friction structure (801), the cam member (560, 570), the first elastic structure (110) and the second elastic structure (120) included in at least one of the first hinge structure (3640) and the second hinge structure (3640-1) corresponds to a corresponding configuration (the fixed bracket, the interlocking gear (4173), the first rotating member (4510), the second rotating member (4520), the first arm member (4410), the second arm member (4420), the shaft fixing portion (4270), the friction structure (4801), the cam member (560, 570) included in at least one of the third hinge structure (3840) and the fourth hinge structure (3840-1) It can be formed to have a width smaller than the first elastic structure (4110) and the second elastic structure (4120).

[0297] According to one embodiment, the separation distance between elastic members included in at least one of the first elastic structure (4110) and the second elastic structure (4120) of the third hinge structure (3840) and the fourth hinge structure (3840-1) may be formed to be greater than the separation distance between elastic members included in at least one of the first elastic structure (110) and the second elastic structure (120) of the first hinge structure (3640) and the second hinge structure (3640-1). According to one embodiment, the electronic device may be configured to have a display (3730) that is rotated multiple times through the first hinge structure (3640) and the second hinge structure (3640-1), and the third hinge structure (3840) and the fourth hinge structure (3840-1) having different widths from the first hinge structure (3640) and the second hinge structure (3640-1). It can be folded.

[0298] Based on at least some of the embodiments described above, at least one foldable electronic device among a plurality of embodiments of the present disclosure comprises a display (230); a first housing (210) and a second housing (220) in which at least a portion of the display is disposed; and a hinge structure (240, 240-1) coupled to the first housing and the second housing, wherein at least one of the hinge structures (240, 240-1) comprises: a first rotation member (510) that rotates according to rotation of the first housing; a second rotation member (520) that rotates according to rotation of the second housing; a first arm member (410) that rotates according to rotation of the first rotation member (510); a second arm member (420) that rotates according to rotation of the second rotation member (520); a first shaft (131) that is coupled to the first arm member (410); a second shaft (132) that is coupled to the second arm member (420); It may include a third shaft (133) and a fourth shaft (134) disposed between the first shaft (131) and the second shaft (132); a first elastic structure (110) including a first elastic member (111) disposed on the first shaft (131), a second elastic member (112) disposed on the second shaft (132), a third elastic member (113) disposed on the third shaft (133), and a fourth elastic member (114) disposed on the fourth shaft (134); and a friction structure (801) disposed between the first arm member (410) and the second arm member (420).

[0299] According to one embodiment, the friction structure (801) includes: a first friction member (700) disposed between the first elastic member (111) and the first arm member (410) and including a first curved surface (751) corresponding to a first outer peripheral surface (435) of the first arm member (410); a second friction member (800) disposed between the second elastic member (112) and the second arm member (420) and including a second curved surface (851) corresponding to a second outer peripheral surface (1435) of the second arm member (420); And a support configured to be disposed between the first friction member (700) and the second friction member (800), and to press the first friction member (700) in a first direction toward the first arm member (410) based on the elastic force from the third elastic member (113) and the fourth elastic member (114), and to press the second friction member (800) in a second direction toward the second arm member (420), so that during at least a partial rotation range of the first arm member (410), the first curved surface (751) of the first friction member (700) forms frictional contact with the first outer peripheral surface (435) of the first arm member (410), and during at least a partial rotation range of the second arm member (420), the second curved surface (851) of the second friction member (800) forms frictional contact with the second outer peripheral surface (1435) of the second arm member (420). Absence (900) may be included.

[0300] According to one embodiment, the friction structure (801) may include a first friction member (700) disposed between the first elastic member (111) and the first arm member (410) and including a first curved surface (751) that generates friction by contacting a first outer peripheral surface (435) of the first arm member (410) as the first arm member (410) rotates; a second friction member (800) disposed between the second elastic member (112) and the second arm member (420) and including a second curved surface (851) that generates friction by contacting a second outer peripheral surface (1435) of the second arm member (420) as the second arm member (420) rotates; and a support member (900) disposed between the first friction member (700) and the second friction member (800).

[0301] According to one embodiment, while the foldable electronic device moves through a first partial rotation range between an unfolded state and a folded state, the first curved surface (751) of the first friction member (700) may be configured to increase frictional contact with the first outer peripheral surface (435) of the first arm member (410) by the increased pressure of the support member (900), and the second curved surface (851) of the second friction member (800) may be configured to increase frictional contact with the second outer peripheral surface (1435) of the second arm member (420) by the increased pressure of the support member (900).

[0302] According to one embodiment, while the foldable electronic device moves in a second partial rotation range between the unfolded state and the folded state, the first curved surface (751) of the first friction member (700) may be configured to reduce frictional contact with the first outer peripheral surface (435) of the first arm member (410) by the reduced pressure of the support member (900), and the second curved surface (851) of the second friction member (800) may be configured to reduce frictional contact with the second outer peripheral surface (1435) of the second arm member (420) by the reduced pressure of the support member (900).

[0303] According to one embodiment, while the foldable electronic device is changed from an unfolded state to a folded state or from a folded state to an unfolded state, the first curved surface (751) of the first friction member (700) can maintain contact with the first outer peripheral surface (435) of the first arm member (410) in response to the pressure of the support member (900), and the second curved surface (851) of the second friction member (800) can maintain contact with the second outer peripheral surface (1435) of the second arm member (420) in response to the pressure of the support member (900).

[0304] According to one embodiment, the first elastic member (111) can press the first friction member (700) in a third direction perpendicular to the first direction, and the second elastic member (112) can press the second friction member (800) in the third direction perpendicular to the second direction.

[0305] According to one embodiment, the first arm member (410) includes a first arm portion (411) formed in a cylindrical shape surrounding a first arm hole into which the first shaft (131) is inserted, and the first arm portion (411) may include a first arm surface (431) facing the first elastic member; and a first outer peripheral surface (435) facing the first friction member.

[0306] According to one embodiment, the second arm member (420) includes a third arm portion (421) formed in a cylindrical shape surrounding a second arm hole into which the second shaft (132) is inserted, and the third arm portion (421) may include a third arm portion including a third arm surface facing the second elastic member and an outer peripheral surface facing the first friction member.

[0307] According to one embodiment, the first friction member (700) may include a first body (713) including a first curved surface surrounding a portion of an outer circumferential surface of the first arm portion; a first outer portion (711) protruding from the first body between the first elastic member and the first arm surface and including a first outer hole communicating with the first arm hole; and a second outer portion (712) protruding from the first body between the support member and the cam member and including a second outer hole into which the third shaft is inserted.

[0308] According to one embodiment, the second friction member (800) may include a second body (813) including a second curved surface surrounding a portion of an outer circumferential surface of the third arm portion; a third outer portion (811) protruding from the second body between the second elastic member and the third arm surface and including a third outer hole communicating with the second arm hole (442); and a fourth outer portion (812) protruding from the second body between the support member and the cam member and including a fourth outer hole into which the fourth shaft is inserted.

[0309] According to one embodiment, the support member (900) may include a first support portion (911) including a first inner hole into which the third shaft is inserted and communicating with the second outer hole; and a second support portion (912) including a second inner hole into which the fourth shaft is inserted and communicating with the fourth outer hole.

[0310] According to one embodiment, the first support portion (911) and the second support portion (912) may be spaced apart from each other through an opening.

[0311] According to one embodiment, the first friction member (700) may include at least one outer inclined surface (761, 762) formed to be inclined at a constant angle with respect to each of the first outer portion (711) and the first body (713), and the second friction member (800) may include at least one outer inclined surface (861, 862) formed to be inclined at a constant angle with respect to each of the third outer portion (811) and the second body (813).

[0312] According to one embodiment, the support member (900) may include a plurality of inner inclined surfaces (961, 962, 971, 972) facing the outer inclined surface of the first friction member and the outer inclined surface of the second friction member, respectively.

[0313] According to one embodiment, the first arm member (410) may further include a second arm member (412) spaced apart from the first arm member with the first elastic structure therebetween, and the second arm member (420) may further include a fourth arm member (422) spaced apart from the third arm member with the first elastic structure therebetween.

[0314] According to one embodiment, the cam member may include a second cam member (570) coupled with the first cam structure formed on the first arm portion and the third cam structure formed on the third arm portion; and a first cam member (560) coupled with the second cam structure formed on the second arm portion and the fourth cam structure formed on the fourth arm portion.

[0315] According to one embodiment, the apparatus may further include a shaft fixing member (270) for fixing the first shaft, the second shaft, the third shaft, and the fourth shaft; and a second elastic structure (120) disposed between the shaft fixing member and the first cam member.

[0316] According to one embodiment, the second elastic structure (120) may include a fifth elastic member (121) disposed on the first shaft (131); a sixth elastic member (122) disposed on the second shaft (132); a seventh elastic member (123) disposed on the third shaft (133); and an eighth elastic member (124) disposed on the fourth shaft (134).

[0317] According to one embodiment, the second friction structure (2100) may further include a first lower inclined surface (2101) and a second lower inclined surface (2102) that are symmetrical to each other and are disposed between each of the first friction member (700) and the second friction member (800) and the second elastic structure (120).

[0318] According to one embodiment, the first friction member (700) may further include a first upper inclined surface (763) facing the first lower inclined surface, and the second friction member may further include a second upper inclined surface (863) facing the second lower inclined surface.

[0319] According to one embodiment of the present disclosure, a hinge structure may include: a first rotation member (510) that rotates about a first axis; a first arm member (410) that rotates in response to the rotation of the first rotation member; a second rotation member (520) that rotates about a second axis; a second arm member (420) that rotates in response to the rotation of the second rotation member; a first shaft (131) that is connected to the first arm member; a second shaft (132) that is connected to the second arm member; a third shaft (133) that is arranged between the first shaft and the second shaft; a fourth shaft (134) that is arranged between the third shaft and the second shaft; a first elastic structure (110) including a plurality of elastic members that are arranged on each of the first shaft, the second shaft, the third shaft, and the fourth shaft; and a friction structure (801) that is arranged between the first elastic structure and the cam member.

[0320] According to one embodiment, the friction structure (801) may include a first friction member (700) disposed between the first elastic structure and the first arm member and in contact with the first arm member; a second friction member (800) disposed between the first elastic structure and the second arm member and in contact with the first arm member; and a support member (900) that presses the first friction member toward the first arm member according to rotation of the first arm member and presses the second friction member toward the second arm member according to rotation of the second arm member.

[0321] According to one embodiment, the first arm member (410) may include a first arm portion (411) formed in a cylindrical shape surrounding a first arm hole into which the first shaft (131) is inserted.

[0322] According to one embodiment, the first arm portion (411) may include a first arm surface (431) facing the first elastic structure; and a first outer peripheral surface (435) facing the first friction member.

[0323] According to one embodiment, the second arm member (420) may include a third arm portion (421) formed in a cylindrical shape surrounding a second arm hole into which the second shaft (132) is inserted.

[0324] In one embodiment, the third arm portion (421) may include a third arm portion including a third surface facing the first elastic structure and an outer surface facing the first friction member.

[0325] According to one embodiment, the first friction member (700) may include a first body (713) including an outer curved surface surrounding a portion of an outer circumferential surface of the first arm portion; a first outer portion (711) protruding from the first body between the first elastic member and the first arm surface and including a first outer hole communicating with the first arm hole; a second outer portion (712) protruding from the first body between the support member and the cam member and including a second outer hole into which the third shaft is inserted; and at least one outer inclined surface (761, 762) formed to be inclined at a predetermined angle with respect to each of the first outer portion (711) and the first body (713).

[0326] According to one embodiment, the second friction member (800) may include a second body (813) including a second outer curved surface surrounding a portion of an outer circumferential surface of the third arm portion; a third outer portion (811) protruding from the second body between the second elastic member and the third arm surface and including a third outer hole communicating with the second arm hole; a fourth outer portion (812) protruding from the second body between the support member and the cam member and including a fourth outer hole into which the fourth shaft is inserted; and at least one outer inclined surface (861, 862) formed to be inclined at a predetermined angle with respect to each of the third outer portion (811) and the second body (813).

[0327] According to one embodiment, the support member (900) may include a first support portion (911) including a first inner hole into which the third shaft is inserted and communicating with the second outer hole; a second support portion (912) including a second inner hole into which the fourth shaft is inserted and communicating with the fourth outer hole; and a plurality of inner inclined surfaces (961, 962, 971, 972) facing the outer inclined surface of the first friction member and the outer inclined surface of the second friction member, respectively.

[0328] According to one embodiment, the electronic device of various embodiments disclosed in the present document may include a mobile communication electronic device, and may be provided as included in a computer program product related to the operation of the mobile communication electronic device. The computer program product may be traded as a commodity between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) through an application store (e.g., Play Store) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0329] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In a foldable electronic device, display (230); A first housing (210) and a second housing (220) in which at least a portion of the above display is arranged; and It includes a first hinge structure (240, 240-1) coupled with the first housing and the second housing, At least one of the above first hinge structures (240, 240-1) A first rotating member (510) that rotates according to the rotation of the first housing; A second rotating member (520) that rotates according to the rotation of the second housing; A first arm member (410) that rotates according to the rotation of the first rotating member (510); A second arm member (420) that rotates according to the rotation of the second rotating member (520); A first shaft (131) connected to the first female member (410); A second shaft (132) connected to the second female member (420); A third shaft (133) and a fourth shaft (134) arranged between the first shaft (131) and the second shaft (132); A first elastic structure (110) including a first elastic member (111) arranged on the first shaft (131), a second elastic member (112) arranged on the second shaft (132), a third elastic member (113) arranged on the third shaft (133), and a fourth elastic member (114) arranged on the fourth shaft (134); and It includes a friction structure (801) arranged between the first female member (410) and the second female member (420), The above friction structure (801) A first friction member (700) disposed between the first elastic member (111) and a portion of the first female member (410), and including a first curved surface (751) corresponding to the first outer peripheral surface (435) of the first female member (410); A second friction member (800) disposed between the second elastic member (112) and a portion of the second arm member (420) and including a second curved surface (851) corresponding to the second outer circumferential surface (1435) of the second arm member (420); and A support configured to be disposed between the first friction member (700) and the second friction member (800), and to press the first friction member (700) in a first direction toward the first arm member (410) based on the elastic force from the third elastic member (113) and the fourth elastic member (114), and to press the second friction member (800) in a second direction toward the second arm member (420), so that during at least a partial rotation range of the first arm member (410), the first curved surface (751) of the first friction member (700) forms frictional contact with the first outer peripheral surface (435) of the first arm member (410), and during at least a partial rotation range of the second arm member (420), the second curved surface (851) of the second friction member (800) forms frictional contact with the second outer peripheral surface (1435) of the second arm member (420). A foldable electronic device comprising an absence (900).

2. In paragraph 1, While the above foldable electronic device moves through a first partial rotation range between the unfolded state and the folded state, The first curved surface (751) of the first friction member (700) is configured to increase frictional contact with the first outer peripheral surface (435) of the first arm member (410) by the increased pressure of the support member (900). A foldable electronic device in which the second curved surface (851) of the second friction member (800) is configured to increase frictional contact with the second outer peripheral surface (1435) of the second arm member (420) by increased pressure of the support member (900).

3. In paragraph 1, While the above foldable electronic device moves through a second partial rotation range between the unfolded state and the folded state, The first curved surface (751) of the first friction member (700) is configured to reduce frictional contact with the first outer peripheral surface (435) of the first arm member (410) by the reduced pressure of the support member (900). A foldable electronic device in which the second curved surface (851) of the second friction member (800) is configured to reduce frictional contact with the second outer peripheral surface (1435) of the second arm member (420) by the reduced pressure of the support member (900).

4. In paragraph 1, The first elastic member (111) presses the first friction member (700) in a third direction perpendicular to the first direction, The second elastic member (112) presses the second friction member (800) in the third direction perpendicular to the second direction, A foldable electronic device in which the third elastic member (113) and the fourth elastic member (114) press the support member (900) in the third direction.

5. In paragraph 1, The above first female member (410) is, It includes a first female part (411) into which the first shaft (131) is inserted, The above first cancer part (411) is, A first rock surface (431) facing the first elastic member (111); and It includes the first outer surface (435) facing the first friction member (700), The above second female member (420) is, It includes a third female part (421) into which the second shaft (132) is inserted, The above third cancer part (421) is, A third rock surface facing the second elastic member (112); and A foldable electronic device including the second outer surface (1435) facing the second friction member (800).

6. In paragraph 5, The above first friction member (700) is A first body (713) including the first curved surface surrounding a portion of the first outer surface (435) of the first female portion (411); A first outer part (711) protruding from the first body (713) between the first elastic member (111) and the first rock surface (431) and including a first outer hole (741) into which the first shaft (131) is inserted; and A foldable electronic device comprising a second outer portion (712) protruding in the second direction from the first body (713) and including a second outer hole (714) into which the third shaft (133) is inserted.

7. In paragraph 6, The above second friction member (800) is A second body (813) including the second curved surface (851) that surrounds a portion of the second outer surface (1435) of the third arm portion; A third outer part (811) protruding from the second body between the second elastic member (112) and the third rock face and including a third outer hole (841) into which the second shaft (132) is inserted; and A foldable electronic device comprising a fourth outer portion (812) protruding from the second body in the first direction and including a fourth outer hole (814) into which the fourth shaft (134) is inserted.

8. In paragraph 7, The above support member (900) is A first support part (911) including a first inner hole (914) into which the third shaft (133) is inserted and which communicates with the second outer hole (714); and A foldable electronic device comprising a second support portion (912) into which the fourth shaft (134) is inserted and which includes a second inner hole (915) communicating with the fourth outer hole (814).

9. In paragraph 8, The above first friction member (700) It comprises at least one outer inclined surface (761, 762) formed to be inclined at a specified angle for each of the first outer portion (711) and the first body (713), The above second friction member (800) A foldable electronic device comprising at least one outer inclined surface (861, 862) formed to be inclined at a constant angle with respect to each of the third outer portion (811) and the second body (813).

10. In paragraph 9, The above support member (900) A foldable electronic device comprising a plurality of inner inclined surfaces (961, 962, 971, 972) facing each of at least one outer inclined surface (761, 762) of the first friction member (700) and at least one outer inclined surface (861, 862) of the second friction member (800).

11. In paragraph 10, The above first female member (410) It further includes a second arm portion (412) spaced apart from the first arm portion (411) and the first elastic structure (110), The above second female member (420) A foldable electronic device further comprising a fourth arm portion (422) spaced apart from the third arm portion and the first elastic structure (110).

12. In paragraph 11, A first cam member (560) supporting the first elastic structure (110); and Each of the first female member (410) and the second female member (420) further includes a second cam member (570) that is coupled thereto. The first cam member (560) is coupled with the first cam structure (450) included in the first arm member (410) and the second cam structure (470) included in the second arm member (420). A foldable electronic device in which the second cam member (570) is combined with the third cam structure (440) included in the first arm member (410) and the fourth cam structure (460) included in the second arm member (420).

13. In paragraph 12, A shaft fixing member (270) that fixes the first shaft, the second shaft, the third shaft, and the fourth shaft; and It further includes a second elastic structure (120) disposed between the shaft fixing member and the second cam member (570). The above second elastic structure (120) is A fifth elastic member (121) arranged on the first shaft (131); A sixth elastic member (122) arranged on the second shaft (132); A seventh elastic member (123) arranged on the third shaft (133); and A foldable electronic device comprising an eighth elastic member (124) disposed on the fourth shaft (134).

14. In paragraph 13, A foldable electronic device further comprising a second friction structure (2100) disposed between each of the first friction member (700) and the second friction member (800) and the second elastic structure (120), the second friction structure including a first lower inclined surface (2101) and a second lower inclined surface (2102) that are symmetrical to each other.

15. In paragraph 14, The above first friction member (700) It further includes a first upper slope (763) facing the first lower slope (2101), The above second friction member (800) A foldable electronic device further comprising a second upper slope (863) facing the second lower slope (2102).

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