Foldable electronic device including hinge structure

Abstract

The foldable electronic device according to embodiments may comprise a hinge assembly that rotatably connects a first housing and a second housing. The hinge assembly may include: a first arm including a first through-hole and a second through-hole; a first shaft passing through the first through-hole and the second through-hole; a second arm including a third through-hole and a fourth through-hole corresponding to a second rotation axis; a second shaft passing through the third through-hole and the fourth through-hole; a first cam member disposed between the first arm and the second arm; a second cam member disposed between the first arm and the second arm; a plurality of first elastic members arranged between the first cam member and the second cam member; a third cam member connected to the second through-hole and the fourth through-hole via the first shaft and the second shaft; a fourth cam member spaced apart from the third cam member; and a plurality of second elastic members arranged between the third cam member and the fourth cam member.

Description

Foldable electronic device including a hinge structure

[0001] The present disclosure relates to a foldable electronic device comprising a hinge structure.

[0002] Electronic devices are being developed in portable or wearable forms to improve mobility and accessibility. These electronic devices are becoming lighter and thinner for ease of portability and are evolving for ease of use.

[0003] For example, foldable electronic devices equipped with a flexible display are gaining popularity as electronic devices that satisfy consumer preferences because they provide a relatively larger screen than conventional bar-type electronic devices, while reducing in size when folded to improve portability.

[0004] Such a foldable electronic device includes a flexible display and a plurality of housings, and the plurality of housings and the flexible display are connected by a hinge assembly, and the housings can be rotated within a specified range according to user operation. Through the process of rotating the plurality of housings, the electronic device can be switched from a folded state to an unfolded state or from an unfolded state to a folded state.

[0005] The information described above may be provided as related art for the purpose of aiding understanding of the present disclosure. No claim or determination is made as to whether any of the foregoing may be applied as prior art related to the present disclosure.

[0006] A foldable electronic device according to one embodiment of the present disclosure may include a first housing, a second housing, and a hinge assembly rotatably connecting the first housing and the second housing. The hinge assembly may include a first arm having a first through hole and a second through hole corresponding to a first rotation axis. The hinge assembly may include a first shaft penetrating the first through hole and the second through hole. The hinge assembly may include a second arm having a third through hole and a fourth through hole corresponding to a second rotation axis parallel to the first rotation axis. The hinge assembly may include a second shaft penetrating the third through hole and the fourth through hole. The hinge assembly may include a first cam member disposed between the first arm and the second arm. The hinge assembly may include a second cam member disposed between the first arm and the second arm. The hinge assembly may include a plurality of first elastic members disposed between the first cam member and the second cam member. The hinge assembly may include a third cam member connected to the second through hole and the fourth through hole through the first shaft and the second shaft. The hinge assembly may include a fourth cam member disposed spaced apart from the third cam member. The hinge assembly may include a plurality of second elastic members disposed between the third cam member and the fourth cam member. The sum of the elastic forces of the plurality of first elastic members may be greater than the sum of the elastic forces of the plurality of second elastic members.

[0007] A foldable electronic device according to one embodiment of the present disclosure may include a first housing, a second housing, and a hinge assembly rotatably connecting the first housing and the second housing. The hinge assembly may include a first arm that rotates about a first rotation axis. The hinge assembly may include a second arm that rotates about a second rotation axis parallel to the first rotation axis. The hinge assembly may include a first cam member disposed between the first arm and the second arm in a direction perpendicular to the first arm and the second arm. The hinge assembly may include a second cam member disposed between the first arm and the second arm in a direction perpendicular to the first arm and the second arm. The hinge assembly may include a plurality of first elastic members disposed between the first cam member and the second cam member to apply elastic forces toward the first cam member and the second cam member. The hinge assembly may include a third cam member disposed adjacent to the second cam member. A portion of the first arm and a portion of the second arm may be disposed between the second cam member and the third cam member. The hinge assembly may include a fourth cam member disposed spaced apart from the third cam member. The hinge assembly may include a plurality of second elastic members disposed between the third cam member and the fourth cam member to apply elastic forces toward the third cam member and the fourth cam member. The sum of the elastic forces of the plurality of first elastic members may be greater than the sum of the elastic forces of the plurality of second elastic members.

[0008] FIG. 1 is a front view of a device according to one embodiment.

[0009] FIG. 2 is a plan view of the rear direction of an electronic device according to one embodiment.

[0010] FIG. 3 is a perspective view of a foldable electronic device in an unfolded state according to one embodiment.

[0011] FIG. 4 is a perspective view of a foldable electronic device in a folded state according to one embodiment.

[0012] FIG. 5 is an exploded perspective view of a foldable electronic device according to one embodiment.

[0013] FIG. 6 is a perspective view of a hinge structure according to one embodiment.

[0014] FIG. 7 is an exploded perspective view of a hinge structure according to one embodiment.

[0015] FIG. 8 is a front view of a first hinge module according to one embodiment.

[0016] FIG. 9 is an exploded perspective view of a first hinge module according to one embodiment.

[0017] FIG. 10 is a drawing showing the combination of the first arm, the second arm, and the first cam assembly of a first hinge module according to one embodiment.

[0018] FIG. 11 is a drawing showing a first shaft, a second shaft, and a plurality of gear members coupled to a first arm, a second arm, and a first cam assembly of a first hinge module according to one embodiment.

[0019] FIG. 12 is a drawing showing a second cam assembly coupled to a first shaft and a second shaft of a first hinge module according to one embodiment.

[0020] FIG. 13 is a drawing showing a shaft bracket coupled to a first shaft and a second shaft of a first hinge module according to one embodiment.

[0021] FIG. 14 is a perspective view of a plurality of gear members according to one embodiment.

[0022] FIG. 15 is a perspective view of a first cam member according to one embodiment.

[0023] FIG. 16 is a drawing showing the arrangement of the first cam portion and the third cam portion and the arrangement of the ninth cam portion and the eleventh cam portion in an unfolded state of a foldable electronic device according to one embodiment.

[0024] FIG. 17 is a drawing showing the arrangement of the first cam portion and the third cam portion and the arrangement of the ninth cam portion and the eleventh cam portion while the foldable electronic device according to one embodiment is being folded.

[0025] FIG. 18 is a drawing showing the arrangement of the first cam portion and the third cam portion and the arrangement of the ninth cam portion and the eleventh cam portion in a folded state of a foldable electronic device according to one embodiment.

[0026] FIG. 19 is a drawing showing a plurality of first elastic members of a first cam assembly and a plurality of second elastic assemblies of a second cam assembly according to one embodiment.

[0027] FIG. 20 is a front view of a first hinge module including a plurality of other gear members according to one embodiment.

[0028] FIG. 21 is a drawing showing elastic members of a hinge structure according to one embodiment.

[0029] FIG. 22 is a drawing showing a hinge module including a spiral structure according to one embodiment.

[0030] FIG. 23 is a drawing showing connecting members and rotating arms coupled to a first hinge module according to one embodiment.

[0031] FIG. 24 is a drawing showing a support plate and a rotating bracket coupled to connecting members and rotating arms according to one embodiment.

[0032] In relation to the description of the drawings, the same or similar reference numerals may be used for identical or similar components.

[0033] Hereinafter, various embodiments of the present invention are described with reference to the accompanying drawings. However, this is not intended to limit the present invention to specific embodiments and should be understood to include various modifications, equivalents, and / or alternatives of the embodiments of the present invention.

[0034] FIG. 1 is a front perspective view of an electronic device according to one embodiment. FIG. 2 is a rear plan view of an electronic device according to one embodiment.

[0035] Referring to FIGS. 1 and 2, the electronic device (200) may include a first housing (210) (e.g., a first housing structure) comprising a first side member (213) (e.g., a side bezel) and a second housing (220) (e.g., a second housing structure) comprising a second side member (223) (e.g., a side bezel), which are foldably joined to each other with respect to a folding axis (F) through at least one hinge device (240, 240-1) (e.g., a hinge module or a hinge structure) with respect to a folding axis (F). 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) positioned to be supported by the first housing (210) and the second housing (220). For example, the first housing (210) may include a first surface (211) and a second surface (212) facing in the opposite direction of the first surface (211) (e.g., in the -z axis direction). For example, the second housing (220) may include a third surface (221) and a fourth surface (222) facing in the opposite direction of the third surface (221) (e.g., in the -z axis direction). 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., unfolded state or unfolded state), the first surface (211) and the third surface (221) may be operated so that they face substantially the same direction (e.g., z-axis direction). For example, when the electronic device (200) is in a fully folded second state (e.g., folded state or folded state), the first surface (211) and the third surface (221) may be operated so that they 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.

[0036] According to one embodiment, the electronic device (200) may include a first receiver (201) disposed on a first surface (211) of a first housing (210), 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). 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 surface (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 the fourth side (222) of the 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 so as 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 the second side member (223), a microphone (203) disposed on the first side member (213), and / or a connector port (207). At least some of the aforementioned components may be repositioned in the first housing (210) and / or the second housing (220).

[0037] According to one embodiment, the first display (230) (e.g., flexible display) may include a first region (230a) (e.g., first planar portion) corresponding to at least a portion of the first surface (211), a second region (230b) (e.g., second planar portion) corresponding to at least a portion of the third surface (221), and a third region (230c) (e.g., flexible portion) connecting the first region (230a) and the second region (230b), to which the electronic device (200) is deformed in a second state (e.g., folding state) and / or a third state. For example, the third region (230c) may be positioned to overlap at least partially with at least one hinge device (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 positioned so as not to be seen from the outside in the second state, with the first surface (211) and the third surface (221) facing each other (e.g., inward-fold type). For example, the first display (230) may be positioned so as to be seen from the outside in the second state, with the first surface (211) and the third surface (221) facing in opposite directions (e.g., outward-fold type).

[0038] FIG. 3 is a perspective view of a foldable electronic device in an unfolded state according to one embodiment. FIG. 4 is a perspective view of a foldable electronic device in a folded state according to one embodiment.

[0039] According to one embodiment of the present disclosure, a foldable electronic device (300) may include a foldable housing (305) comprising a first housing (310), a second housing (320), and a hinge housing (330), and a flexible display (340). For example, the foldable electronic device (300) may correspond to the electronic device (200) of FIGS. 1 and 2. For example, the foldable housing (305) may correspond to the foldable housing of FIGS. 1 and 2. For example, the first housing (310) may correspond to the first housing (210) of FIGS. 1 and 2. For example, the second housing (320) may correspond to the second housing (220) of FIGS. 1 and 2. For example, the flexible display (340) may correspond to the first display (230) of FIGS. 1 and 2.

[0040] According to one embodiment of the present disclosure, with reference to FIGS. 3 and 4, a hinge housing (330) may be disposed between a first housing (310) and a second housing (320). For example, the hinge housing (330) may be formed integrally with the first housing (310) and the second housing (320), or it may be formed as a separate member. According to one embodiment, a flexible display (340) may be disposed at least partially within a foldable housing (305). For example, the flexible display (340) may include a first display portion (350), a second display portion (360), and a folding portion (370).

[0041] According to one embodiment of the present disclosure, referring to FIG. 3, for example, a first display portion (350) of a flexible display (340) may be at least partially disposed within a first housing (310). For example, a second display portion (360) of a flexible display (340) may be at least partially disposed within a second housing (320). For example, a folding portion (370) of a flexible display (340) may be at least partially disposed within a hinge housing (330). For example, the folding portion (370) of a flexible display (340) may be a portion that folds or unfolds as the foldable electronic device (300) is folded or unfolded.

[0042] According to one embodiment of the present disclosure, with reference to FIG. 3, in a first unfolded state of the foldable electronic device (300), the first housing (310) and the second housing (320) may be arranged substantially parallel. For example, in the first state of the foldable electronic device (300), the first housing (310) and the second housing (320) may be arranged to face the +z-axis direction. For example, in the first state of the foldable electronic device (300), the first display portion (350) and the second display portion (360) of the flexible display (340) may be arranged substantially parallel. For example, in the first state of the foldable electronic device (300), the first display portion (350) and the second display portion (360) of the flexible display (340) may be arranged to face the +z-axis direction.

[0043] According to one embodiment of the present disclosure, with reference to FIG. 4, in a folded second state of the foldable electronic device (300), the first housing (310) may be placed on the second housing (320). For example, in the second state of the foldable electronic device (300), the first housing (310) may be placed facing the second housing (320). For example, in the second state of the foldable electronic device (300), the first display portion (350) and the second display portion (360) of the flexible display (340) may be placed facing each other.

[0044] According to one embodiment of the present disclosure, with reference to FIGS. 3 and 4, while the state of the foldable electronic device (300) changes from a first state to a second state, the first housing (310) and the second housing (320) may move closer to each other. For example, while the state of the foldable electronic device (300) changes from a first state to a second state, the first display portion (350) and the second display portion (360) may move closer to each other. According to one embodiment, while the state of the foldable electronic device (300) changes from a second state to a first state, the first housing (310) and the second housing (320) may move further apart from each other. For example, while the state of the foldable electronic device (300) changes from a second state to a first state, the first display portion (350) and the second display portion (360) may move further apart from each other.

[0045] FIG. 5 is an exploded perspective view of a foldable electronic device according to one embodiment.

[0046] According to one embodiment of the present disclosure, the foldable electronic device (300) may further include a hinge structure (410), a support plate (420), a first decorative member (430), a second decorative member (440), a first rear cover (450), and a second rear cover (460).

[0047] According to one embodiment of the present disclosure, a hinge structure (410) can rotatably connect a first housing (310) and a second housing (320). For example, the first housing (310) may be coupled to one side of the hinge structure (410). For example, the second housing (320) may be coupled to the other side opposite to one side of the hinge structure (410). For example, the first housing (310) and the second housing (320) are rotated by the hinge structure (410), and as the first housing (310) and the second housing (320) are rotated, the foldable electronic device (300) may be folded or unfolded.

[0048] According to one embodiment of the present disclosure, a hinge structure (410) may be disposed between a hinge housing (330) and a flexible display (340). For example, the hinge structure (410) may be disposed at least partially within the hinge housing (330). For example, the hinge structure (410) may be disposed at a position corresponding to a folding portion (370) of the flexible display (340). For example, as the foldable electronic device (300) is folded or unfolded by the hinge structure (410), the folding portion (370) of the flexible display (340) may be folded or unfolded.

[0049] According to one embodiment of the present disclosure, a support plate (420) may be positioned between a flexible display (340) and a hinge structure (410). For example, the support plate (420) may be positioned at a location corresponding to a folding portion (370) of the flexible display (340). For example, while the foldable electronic device (300) is folded or unfolded, the support plate (420) may support the flexible display (340). According to one embodiment, the support plate (420) may be positioned at least partially on the hinge structure (410). For example, the support plate (420) may be positioned in the central portion of the hinge structure (410). For example, the support plate (420) may be seated in the central portion of the hinge structure (410).

[0050] According to one embodiment of the present disclosure, the first decorative member (430) and the second decorative member (440) can protect the flexible display (340). For example, the first decorative member (430) may be positioned to surround at least a portion of the edge of the first display portion (350) of the flexible display (340). For example, the second decorative member (440) may be positioned to surround at least a portion of the edge of the second display portion (360) of the flexible display (340).

[0051] According to one embodiment of the present disclosure, the first rear cover (450) and the second rear cover (460) may form at least a portion of the exterior of the foldable electronic device (300). For example, the first rear cover (450) may be formed to cover at least a portion of the rear surface facing the -z axis of the first housing (310). For example, the second rear cover (460) may be formed to cover at least a portion of the rear surface facing the -z axis of the second housing (320).

[0052] FIG. 6 is a perspective view of a hinge structure according to one embodiment. FIG. 7 is an exploded perspective view of a hinge structure according to one embodiment.

[0053] Referring to FIG. 6, according to one embodiment, the hinge structure (410) may include a plurality of hinge assemblies. For example, the plurality of hinge assemblies may include a first hinge assembly (510), a second hinge assembly (520), and a third hinge assembly (530). However, it is not limited thereto, and the hinge structure (410) may further include other hinge assemblies, and some of the hinge assemblies of FIG. 6 may be omitted during implementation.

[0054] According to one embodiment of the present disclosure, FIG. 6 may be a drawing illustrating the arrangement of a plurality of hinge assemblies included in a hinge structure (410). For example, a first hinge assembly (510), a second hinge assembly (520), and a third hinge assembly (530) may be arranged along the y-axis direction. For example, the first hinge assembly (510) may be placed on one side of the hinge structure (410), and the third hinge assembly (530) may be placed on the other side opposite to the one side of the hinge structure (410). For example, the third hinge assembly (530) may be arranged symmetrically with respect to the first hinge assembly (510). For example, the second hinge assembly (520) may be placed between the first hinge assembly (510) and the third hinge assembly (530). For example, the second hinge assembly (520) may be positioned adjacent to the first hinge assembly (510). For example, the second hinge assembly (520) may be positioned to be coupled with the first hinge assembly (510). For example, the second hinge assembly (520) may be positioned spaced apart from the third hinge assembly (530). For example, by positioning the second hinge assembly (520) spaced apart from the third hinge assembly (530), at least one electronic component provided within the foldable electronic device (300) may be positioned between the second hinge assembly (520) and the third hinge assembly (530). However, not limited to FIG. 6, the arrangement of the plurality of hinge assemblies may be changed according to the arrangement of the plurality of electronic components within the foldable electronic device (300).

[0055] Referring to FIG. 7, according to one embodiment, the hinge structure (410) may include a first hinge assembly (510), a second hinge assembly (520), and a third hinge assembly (530). For example, the first hinge assembly (510) may include a first hinge module (700), a first rotating arm (631), a second rotating arm (632), a first connecting member (641), a second connecting member (642), a first rotating bracket (671), and a first support plate (681). For example, the second hinge assembly (520) may include a second hinge module (800), a third hinge module (900), a third rotating arm (633), a fourth rotating arm (634), a third connecting member (643), a fourth connecting member (644), a second rotating bracket (672), and a second support plate (682). For example, the third hinge assembly (530) may include a fourth hinge module (1000), a fifth rotating arm (635), a sixth rotating arm (636), a fifth connecting member (645), a sixth connecting member (646), a third rotating bracket (673), and a third support plate (683).

[0056] Referring to FIG. 7, according to one embodiment, the first hinge module (700) may include a first shaft (601), a second shaft (602), a first arm (611), a second arm (612), a first cam assembly (621), a second cam assembly (622), a plurality of first gear members (651), and a first shaft bracket (661). According to one embodiment, the second hinge module (800) may include a third shaft (603), a fourth shaft (604), a third arm (613), a fourth arm (614), a third cam assembly (623), a fourth cam assembly (624), a plurality of second gear members (652), and a second shaft bracket (662). According to one embodiment, the third hinge module (900) may include a fifth shaft (605), a sixth shaft (606), a fifth arm (615), a sixth arm (616), a fifth cam assembly (625), a sixth cam assembly (626), a plurality of third gear members (653), and a third shaft bracket (663). According to one embodiment, the fourth hinge module (1000) may include a seventh shaft (607), an eighth shaft (608), a seventh arm (617), an eighth arm (618), a seventh cam assembly (627), an eighth cam assembly (628), a plurality of fourth gear members (654), and a fourth shaft bracket (664).

[0057] Referring to FIGS. 6 and 7, according to one embodiment, the first hinge assembly (510) and the second hinge assembly (520) can be joined. For example, the first hinge assembly (510) and the second hinge assembly (520) can be joined by fixing the second cam assembly (622) of the first hinge module (700) and the fourth cam assembly (624) of the second hinge module (800) by a fastening member.

[0058] Referring to FIGS. 6 and 7, according to one embodiment, the second hinge module (800) and the third hinge module (900) of the second hinge assembly (520) can rotate together while the foldable electronic device (300) is folded or unfolded. For example, the second hinge module (800) and the third hinge module (900) can rotate together by being coupled to the third connecting member (643) and the fourth connecting member (644). For example, the third arm (613) of the second hinge module (800) and the fifth arm (615) of the third hinge module (900) are coupled to the third connecting member (643), and the fourth arm (614) of the second hinge module (800) and the sixth arm (616) of the third hinge module (900) are coupled to the fourth connecting member (644), so that the second hinge module (800) and the third hinge module (900) can rotate together. For example, a third rotating arm (633) and a fourth rotating arm (634) may be positioned between the second hinge module (800) and the third hinge module (900). For example, the third rotating arm (633) may be coupled to the third connecting member (643), and the fourth rotating arm (634) may be coupled to the fourth connecting member (644). For example, as the third rotating arm (633) and the fourth rotating arm (634) rotate, the second hinge module (800) and the third hinge module (900) may rotate together.

[0059] In FIGS. 6 and 7, an example was described in which the second hinge assembly (520) includes a second hinge module (800) and a third hinge module (900), but is not limited thereto and may be composed of a single hinge module.

[0060] Referring to FIGS. 6 and 7, according to one embodiment, the second hinge assembly (520) and the third hinge assembly (530) may be spaced apart from each other. For example, by spaced apart from each other, at least one electronic component provided within the foldable electronic device (300) may be disposed between the sixth cam assembly (626) of the third hinge module (900) of the second hinge assembly (520) and the eighth cam assembly (628) of the fourth hinge module (1000) of the third hinge assembly (530).

[0061] The arrangement or connection relationship between the components of the hinge module is described in detail in FIGS. 8 to 13, which will be described later, and the arrangement or connection relationship between the hinge module and the rotating arms, connecting members, rotating brackets, and support plates is described in detail in FIGS. 23 to 24, which will be described later.

[0062] FIG. 8 is a front view of a first hinge module according to one embodiment. FIG. 9 is an exploded perspective view of a first hinge module according to one embodiment. For example, the second hinge module (800) to the fourth hinge module (1000) may correspond to the first hinge module (700), and for convenience in FIG. 8 and FIG. 9, the description of the configurations of the second hinge module (800) to the fourth hinge module (1000) will be omitted.

[0063] Referring to FIG. 8, according to one embodiment, a first hinge module (700) may include a first shaft (601), a second shaft (602), a first arm (611), a second arm (612), a first cam assembly (621), a second cam assembly (622), and a plurality of first gear members (651). Referring to FIG. 8, according to one embodiment, a first cam assembly (621) may include a first cam member (710), a second cam member (720), and a plurality of first elastic members (770). Referring to FIG. 8, according to one embodiment, a second cam assembly (622) may include a third cam member (730), a fourth cam member (740), and a plurality of second elastic members (780).

[0064] Referring to FIG. 9, according to one embodiment, a first shaft (601) may be positioned to penetrate a first arm (611), a first cam member (710), at least some of a plurality of first elastic members (770), a second cam member (720), a third cam member (730), at least some of a plurality of second elastic members (780), and a fourth cam member (740) along a first rotation axis. According to one embodiment, a second shaft (602) may be positioned to penetrate a second arm (612), a first cam member (710), at least some of a plurality of first elastic members (770), a second cam member (720), a third cam member (730), at least some of a plurality of second elastic members (780), and a fourth cam member (740) along a second rotation axis. The penetration structure will be described in detail in FIG. 10 to 12, which will be described later.

[0065] Referring to FIG. 9, according to one embodiment, the first arm (611) may be coupled to and rotated on the first shaft (601). For example, the first arm (611) may rotate about the first shaft (601) corresponding to the first rotation axis. For example, as the first arm (611) rotates about the first shaft (601), the foldable electronic device (300) may be folded or unfolded. Referring to FIG. 9, according to one embodiment, the first arm (611) may include one side that is penetrated by the first shaft (601) and another side formed spaced apart from said one side. For example, the first shaft (601) may penetrate a hole formed on one side of the first arm (611) and a hole formed on the other side of the first arm (611). A hole formed on one side of the first arm (611) and a hole formed on the other side of the first arm (611) may be formed spaced apart from each other by a predetermined distance along the y-axis direction with the first cam assembly (621) in between.

[0066] Referring to FIG. 9, according to one embodiment, the second arm (612) may be coupled to and rotated on the second shaft (602). For example, the second arm (612) may rotate about the second shaft (602) corresponding to a second axis of rotation substantially parallel to the first axis of rotation. For example, as the second arm (612) rotates about the second shaft (602), the foldable electronic device (300) may be folded or unfolded. Referring to FIG. 9, according to one embodiment, the second arm (612) may include one side that is penetrated by the second shaft (602) and another side formed spaced apart from said one side. For example, the second shaft (602) may penetrate a hole formed on one side of the second arm (612) and a hole formed on the other side of the second arm (612). A hole formed on one side of the second arm (612) and a hole formed on the other side of the second arm (612) may be formed spaced apart from each other by a predetermined distance along the y-axis direction with the first cam assembly (621) in between.

[0067] Referring to FIG. 9, according to one embodiment, a first cam assembly (621) may be positioned between a first arm (611) and a second arm (612). For example, a first cam member (710) of the first cam assembly (621) may be positioned between the first arm (611) and the second arm (612). For example, the first cam member (710) may be positioned between the first arm (611) and the second arm (612) substantially perpendicular to the first shaft (601) and the second shaft (602). According to one embodiment, the first cam member (710) may include one side, another side opposite to the one side, and a connecting portion connecting the one side and the other side. For example, one side of the first cam member (710) may be a portion through which the first shaft (601) passes. For example, the other side of the first cam member (710) may be a portion through which the second shaft (602) passes. For example, one side of the first cam member (710) may be positioned adjacent to one side of the first arm (611). For example, one side of the first cam member (710) may be positioned to be in contact with one side of the first arm (611). For example, the other side of the first cam member (710) may be positioned adjacent to one side of the second arm (612). For example, the other side of the first cam member (710) may be positioned to be in contact with one side of the second arm (612). For example, the connection portion of the first cam member (710) may be formed perpendicular to the first shaft (601) and the second shaft (602).

[0068] Referring to FIG. 9, according to one embodiment, for example, a second cam member (720) of a first cam assembly (621) may be positioned between a first arm (611) and a second arm (612). For example, the second cam member (720) may be positioned between the first arm (611) and the second arm (612) substantially perpendicular to the first shaft (601) and the second shaft (602). For example, the second cam member (720) may be positioned between the first arm (611) and the second arm (612) spaced apart from the first cam member (710). According to one embodiment, the second cam member (720) may include one side, another side opposite to the one side, and a connecting portion connecting the one side and the other side. For example, one side of the second cam member (720) may be positioned adjacent to the other side of the first arm (611). For example, the other side of the second cam member (720) may be positioned to be in contact with the other side of the first arm (611). For example, the other side of the second cam member (720) may be positioned adjacent to the other side of the second arm (612). For example, the other side of the second cam member (720) may be positioned to be in contact with the other side of the second arm (612). For example, the connection portion of the second cam member (720) may be formed perpendicular to the first shaft (601) and the second shaft (602).

[0069] According to one embodiment, the arrangement and contact between the first cam member (710) and the second cam member (720) and the first arm (611), the second arm (612), and the plurality of first gear members (651) are described in detail in FIGS. 10, FIGS. 11, and FIGS. 16 to 18, which will be described later, and the shape of the first cam member (710) and the second cam member (720) is described in detail in FIG. 15, which will be described later.

[0070] Referring to FIG. 9, according to one embodiment, a plurality of first gear members (651) may be positioned between one side of the first arm (611) and one side of the second arm (612). For example, some of the plurality of first gear members (651) may be positioned to be in contact with one side of the first arm (611), and the remaining portions of the plurality of first gear members (651) may be positioned to be in contact with one side of the second arm (612). For example, the plurality of first gear members (651) may be positioned on the connecting portion of the first cam member (710) between one side of the first arm (611) and one side of the second arm (612). For example, the plurality of first gear members (651) may be positioned to be in contact with one surface of the connecting portion of the first cam member (710). The shape of the plurality of first gear members (651) will be described in detail in FIG. 14, which will be described later.

[0071] Referring to FIG. 9, according to one embodiment, the first shaft bracket (661) can fix the first shaft (601), the second shaft (602), and a plurality of first gear members (651). For example, the first shaft (601) is positioned to pass through one side of the first shaft bracket (661), and the diameter of one end of the first shaft (601) is formed to be larger than the diameter formed on one side of the first shaft bracket (661), so that the first shaft (601) may not detach from the first shaft bracket (661). For example, the second shaft (602) is positioned to penetrate the other side opposite to one side of the first shaft bracket (661), and the diameter of one end of the second shaft (602) is formed to be larger than the diameter formed on the other side of the first shaft bracket (661), so that the second shaft (602) may not detach from the first shaft bracket (661). For example, a plurality of gear members (651) positioned to penetrate between one side and the other side of the first shaft bracket (661) may be fixed by the first shaft bracket (661).

[0072] Referring to FIG. 9, according to one embodiment, a plurality of first elastic members (770) may be disposed between a first cam member (710) and a second cam member (720). For example, some of the plurality of first elastic members (770) may be fixed by being penetrated by a first shaft (601) between the first cam member (710) and the second cam member (720). For example, other parts of the plurality of first elastic members (770) may be fixed by being penetrated by a second shaft (602) between the first cam member (710) and the second cam member (720). For example, the plurality of first elastic members (770) may be disposed parallel to the first shaft (601) and the second shaft (602). For example, the plurality of first elastic members (770) may be disposed to apply an elastic force toward the first cam member (710) and the second cam member (720). The arrangement of the plurality of first elastic members (770) will be described in detail in FIG. 10, which will be described later.

[0073] Referring to FIG. 9, according to one embodiment, the second cam assembly (622) may be spaced apart from the first cam assembly (621). For example, a first arm (611) and a second arm (612) may be positioned between the first cam assembly (621) and the second cam assembly (622). For example, the other side of the first arm (611) and the other side of the second arm (612) may be positioned between the first cam assembly (621) and the second cam assembly (622).

[0074] Referring to FIG. 9, according to one embodiment, the third cam member (730) may be spaced apart from the second cam member (720). For example, the other side of the first arm (611) and the other side of the second arm (612) may be positioned between the third cam member (730) and the second cam member (720). For example, the third cam member (730) may be positioned perpendicular to the first shaft (601) and the second shaft (602). According to one embodiment, the third cam member (730) may include a side, a side opposite to the side, and a connecting portion connecting the side and the other side. For example, one side of the third cam member (730) may be positioned adjacent to the other side of the first arm (611). For example, one side of the third cam member (730) may be positioned to be in contact with the other side of the first arm (611). For example, one side of the second cam member (720) may be in contact with one side of the other side of the first arm (611), and one side of the third cam member (730) may be in contact with the other side opposite to one side of the other side of the first arm (611). For example, the other side of the third cam member (730) may be positioned adjacent to the other side of the second arm (612). For example, the other side of the third cam member (730) may be positioned to be in contact with the other side of the second arm (612). For example, the other side of the second cam member (720) may be in contact with one side of the other side of the second arm (612), and the other side of the third cam member (730) may be in contact with the other side opposite to one side of the other side of the second arm (612).

[0075] Referring to FIG. 9, according to one embodiment, the fourth cam member (740) may be spaced apart from the third cam member (730). For example, the fourth cam member (740) may be positioned perpendicular to the first shaft (601) and the second shaft (602). For example, the fourth cam member (740) may be positioned parallel to the third cam member (730). According to one embodiment, the fourth cam member (740) may include a side corresponding to one side of the third cam member (730), a other side corresponding to the other side of the third cam member (730), and a connection part corresponding to the connection part of the third cam member (730). For example, the connection part of the fourth cam member (740) may be a part connecting the one side and the other side opposite to the one side.

[0076] According to one embodiment, the arrangement and contact between the third cam member (730) and the fourth cam member (740) and the first arm (611) and the second arm (612) are described in detail in FIG. 12 and FIG. 16 to 18, which will be described later, and the shape of the third cam member (730) and the fourth cam member (740) is described in detail in FIG. 15, which will be described later.

[0077] Referring to FIG. 9, according to one embodiment, a plurality of second elastic members (780) may be disposed between a third cam member (730) and a fourth cam member (740). For example, some of the plurality of second elastic members (780) may be fixed by being penetrated by a first shaft (601) between the third cam member (730) and the fourth cam member (740). For example, other parts of the plurality of second elastic members (780) may be fixed by being penetrated by a second shaft (602) between the third cam member (730) and the fourth cam member (740). For example, the plurality of second elastic members (780) may be disposed parallel to the first shaft (601) and the second shaft (602). For example, the plurality of second elastic members (780) may be disposed to apply an elastic force toward the third cam member (730) and the fourth cam member (740). The arrangement of the plurality of second elastic members (780) will be described in detail in FIG. 12, which will be described later.

[0078] Referring to FIG. 9, according to one embodiment, a first connecting member (641) may be coupled to a first arm (611) and a first rotating arm (631). For example, the first arm (611) and the first rotating arm (631) coupled to the first connecting member (641) may rotate together. For example, as the foldable electronic device (300) is folded or unfolded, the first arm (611) and the first rotating arm (631) may rotate together by the first connecting member (641). According to one embodiment, a second connecting member (642) may be coupled to a second arm (612) and a second rotating arm (632). For example, the second arm (612) and the second rotating arm (632) coupled to the second connecting member (642) may rotate together. For example, as the foldable electronic device (300) is folded or unfolded, the second arm (612) and the second rotating arm (632) can rotate together by means of the second connecting member (642).

[0079] Referring to FIG. 9, according to one embodiment, the first rotation bracket (671) may support or guide the rotation of the first rotation arm (631) and the second rotation arm (632). For example, while the foldable electronic device (300) is folded or unfolded, the first rotation arm (631) and the second rotation arm (632) may be guided to rotate by the first rotation bracket (671) so as not to detach from the first hinge assembly (510).

[0080] Referring to FIG. 9, according to one embodiment, a first support plate (681) may be positioned in the center portion of a first hinge assembly (510). For example, the first support plate (681) may be at least partially supported by a first hinge module (700), a first rotating arm (631), and a second rotating arm (632). For example, the first support plate (681) may be fixed by being coupled to a first rotating bracket (671). According to one embodiment, the first support plate (681) may support a flexible display (340). For example, the first support plate (681) may at least partially support a folding or unfolding portion of the flexible display (340) when the foldable electronic device (300) is unfolded. The combination or arrangement of the first rotating arm (631), the second rotating arm (632), the first connecting member (641), the second connecting member (642), the first rotating bracket (671), the first support plate (681), and the first hinge module (700) will be described in detail in FIG. 23 and FIG. 24, which will be described later.

[0081] FIG. 10 is a drawing showing the combination of the first arm, the second arm, and the first cam assembly of a first hinge module according to one embodiment.

[0082] Referring to FIG. 10, according to one embodiment, the first arm (611) may include a first through hole (801) formed to penetrate one side and a second through hole (802) formed to penetrate the other side spaced apart from the one side. For example, the first through hole (801) may be formed to penetrate one side of the first arm (611) and the other side opposite to the one side. For example, the second through hole (802) may be formed to penetrate one side of the other side of the first arm (611) and the other side opposite to the one side. According to one embodiment, a space may be formed between the one side of the first arm (611) where the first through hole (801) is formed and the other side where the second through hole (802) is formed, such that one side of the first cam assembly (621) may be located. For example, one side of the first arm (611), the other side, and the connecting portion connecting the one side and the other side may form a space where the first cam assembly (621) can be located. According to one embodiment, the first shaft (601) may be positioned to pass through the first through hole (801) and the second through hole (802) of the first arm (611). The first arm (611) may rotate using the first shaft (601) passing through the first through hole (801) and the second through hole (802) as the first axis of rotation.

[0083] Referring to FIG. 10, according to one embodiment, the first arm (611) may include a first cam portion (901) formed to surround a first through hole (801). For example, the first cam portion (901) may be formed to surround the other side facing the -y-axis direction of one side of the first arm (611) where the first through hole (801) is formed. For example, with one side of the first cam assembly (621) positioned between one side of the first arm (611) where the first through hole (801) is formed and the other side of the first arm (611) where the second through hole (802) is formed, the first cam portion (901) may be formed toward the first cam member (710).

[0084] Referring to FIG. 10, according to one embodiment, the first arm (611) may include a ninth cam portion (909) formed to surround the second through hole (802). For example, the ninth cam portion (909) may be formed to surround the other side of the first arm (611) facing the -y-axis direction where the second through hole (802) is formed. For example, with one side of the second cam assembly (622) positioned adjacent to the second through hole (802) of the first arm (611), the ninth cam portion (909) of the first arm (611) may be formed toward the third cam member (730).

[0085] Referring to FIG. 10, according to one embodiment, the second arm (612) may include a third through hole (803) formed to penetrate one side and a fourth through hole (804) formed to penetrate the other side spaced apart from the one side. For example, the third through hole (803) may be formed to penetrate one side of the second arm (612) and the other side opposite to the one side. For example, the fourth through hole (804) may be formed to penetrate one side of the other side of the second arm (612) and the other side opposite to the one side. According to one embodiment, a space may be formed between the one side of the second arm (612) where the third through hole (803) is formed and the other side where the fourth through hole (804) is formed, such that the other side opposite to the one side of the first cam assembly (621) may be located. For example, one side of the second arm (612), the other side, and the connecting portion connecting the one side and the other side may form a space where the first cam assembly (621) can be located. According to one embodiment, the second shaft (602) may be positioned to pass through the third through hole (803) and the fourth through hole (804) of the second arm (612). The second arm (612) may rotate with the second shaft (602) passing through the third through hole (803) and the fourth through hole (804) as a second axis of rotation parallel to the first axis of rotation.

[0086] Referring to FIG. 10, according to one embodiment, the second arm (612) may include a second cam portion (902) formed to surround the third through hole (803). For example, the second cam portion (902) may be formed to surround the other side facing the -y-axis direction of one side of the second arm (612) where the third through hole (803) is formed. For example, with the other side opposite to one side of the first cam assembly (621) positioned between one side of the second arm (612) where the third through hole (803) is formed and the other side of the second arm (612) where the fourth through hole (804) is formed, the second cam portion (902) may be formed toward the first cam member (710).

[0087] Referring to FIG. 10, according to one embodiment, the second arm (612) may include a tenth cam portion (910) formed to surround the fourth through hole (804). For example, the tenth cam portion (910) may be formed to surround the other side of the second arm (612) facing the -y-axis direction where the fourth through hole (804) is formed. For example, with the other side of the second cam assembly (622) opposite to one side positioned adjacent to the fourth through hole (804) of the second arm (612), the tenth cam portion (910) of the second arm (612) may be formed toward the third cam member (730).

[0088] Referring to FIG. 10, according to one embodiment, the first cam member (710) of the first cam assembly (621) may include a fifth through hole (805) and a sixth through hole (806). For example, the fifth through hole (805) may be formed to penetrate one side of one side of the first cam member (710) and the other side opposite to that side. For example, the fifth through hole (805) may be formed to correspond to the first through hole (801). For example, with one side of the first cam assembly (621) positioned between the first through hole (801) and the second through hole (802) of the first arm (611), the first shaft (601) may be positioned to penetrate the first through hole (801), the fifth through hole (805), and the second through hole (802). For example, the sixth through hole (806) may be formed to penetrate one side of the other side opposite to one side of the first cam member (710) and the other side opposite to one side. For example, the sixth through hole (806) may be formed to correspond to the third through hole (803). For example, with the other side opposite to one side of the first cam assembly (621) positioned between the third through hole (803) and the fourth through hole (804) of the second arm (612), the second shaft (602) may be positioned to penetrate the third through hole (803), the sixth through hole (806), and the fourth through hole (804).

[0089] Referring to FIG. 10, according to one embodiment, the first cam member (710) may include a third cam portion (903) and a fourth cam portion (904). In one embodiment, the third cam portion (903) may be formed to surround the fifth through hole (805). For example, the third cam portion (903) may be formed on one side facing the +y-axis direction of the first cam member (710) where the fifth through hole (805) is formed. For example, with one side of the first cam assembly (621) positioned between the first through hole (801) and the second through hole (802) of the first arm (611), the third cam portion (903) may be in contact with the first cam portion (901). For example, with one side of the first cam assembly (621) positioned between the first through hole (801) and the second through hole (802) of the first arm (611), the third cam portion (903) may be formed toward the side where the first through hole (801) of the first arm (611) is formed. For example, the third cam portion (903) may be formed in a shape corresponding to the shape of the first cam portion (901). For example, the third cam portion (903) may be formed to engage with the first cam portion (901). In one embodiment, the fourth cam portion (904) may be formed to surround the sixth through hole (806). For example, the fourth cam portion (904) may be formed on one side facing the +y-axis direction of the first cam member (710) where the sixth through hole (806) is formed. For example, with the other side opposite to one side of the first cam assembly (621) positioned between the third through hole (803) and the fourth through hole (804) of the second arm (612), the fourth cam portion (904) may come into contact with the second cam portion (902). For example, with the other side opposite to one side of the first cam assembly (621) positioned between the third through hole (803) and the fourth through hole (804) of the second arm (612), the fourth cam portion (904) may be formed toward the side where the third through hole (803) of the second arm (612) is formed.For example, the fourth cam portion (904) may be formed with a shape corresponding to the shape of the second cam portion (902). For example, the fourth cam portion (904) may be formed to engage with the second cam portion (902). The shape of the cam portion will be described in detail in FIGS. 15 to 18, which will be described later.

[0090] Referring to FIG. 10, according to one embodiment, a second cam member (720) spaced apart from a first cam member (710) may include a seventh through hole (807) and an eighth through hole (808). In one embodiment, the seventh through hole (807) may be formed to penetrate one side of one side of the second cam member (720) and the other side opposite to that side. For example, the seventh through hole (807) may be formed to correspond to the second through hole (802). For example, with one side of the first cam assembly (621) positioned between the first through hole (801) and the second through hole (802) of the first arm (611), the first shaft (601) may be positioned to penetrate the seventh through hole (807) and the second through hole (802). In one embodiment, the eighth through hole (808) may be formed to penetrate one side of the other side opposite to one side of the second cam member (720) and the other side opposite to one side. For example, the eighth through hole (808) may be formed to correspond to the fourth through hole (804). For example, with the other side opposite to one side of the first cam assembly (621) positioned between the third through hole (803) and the fourth through hole (804) of the second arm (612), the second shaft (602) may be positioned to penetrate the eighth through hole (808) and the fourth through hole (804).

[0091] Referring to FIG. 10, according to one embodiment, a plurality of first elastic members (770) may be disposed between a first cam member (710) and a second cam member (720). According to one embodiment, the plurality of first elastic members (770) may include a first spring (1010), a second spring (1020), a third spring (1030), and a fourth spring (1040). However, the type of the plurality of first elastic members (770) is not limited to springs, and the number of springs is not limited to FIG. 10.

[0092] Referring to FIG. 10, according to one embodiment, a first spring (1010) may be positioned between the fifth through hole (805) of the first cam member (710) and the seventh through hole (807) of the second cam member (720). For example, the first spring (1010) may be positioned to apply an elastic force toward the first cam member (710) and the second cam member (720) between the fifth through hole (805) and the seventh through hole (807). For example, the first spring (1010) may apply an elastic force to the first cam member (710) and the second cam member (720) in a direction parallel to the first shaft (601) and the second shaft (602). According to one embodiment, the first spring (1010) may be a coil spring, and the first spring (1010) may be fixed between the first cam member (710) and the second cam member (720) by a first shaft (601) passing through the first spring (1010). For example, the first spring (1010) may move elastically without being dislodged from the outside of the first hinge module (700) by the first shaft (601) positioned to pass through the first spring (1010).

[0093] Referring to FIG. 10, according to one embodiment, a second spring (1020) may be positioned between the sixth through hole (806) of the first cam member (710) and the eighth through hole (808) of the second cam member (720). For example, the second spring (1020) may be positioned to apply an elastic force toward the first cam member (710) and the second cam member (720) between the sixth through hole (806) and the eighth through hole (808). For example, the second spring (1020) may apply an elastic force to the first cam member (710) and the second cam member (720) in a direction parallel to the first shaft (601) and the second shaft (602). According to one embodiment, the second spring (1020) may be a coil spring, and the second spring (1020) may be fixed between the first cam member (710) and the second cam member (720) by a second shaft (602) passing through the second spring (1020). For example, the second spring (1020) may move elastically without being dislodged from the outside of the first hinge module (700) by the second shaft (602) positioned to pass through the second spring (1020).

[0094] Referring to FIG. 10, according to one embodiment, a third spring (1030) and a fourth spring (1040) may be positioned between a first spring (1010) and a second spring (1020). For example, the third spring (1030) and the fourth spring (1040) may be fixed by a first cam member (710) and a second cam member (720). For example, each of the third spring (1030) and the fourth spring (1040) may be fixed by a protrusion formed in the -y-axis direction on a connecting part connecting one side and the other side of the first cam member (710) and a protrusion formed in the +y-axis direction on a connecting part connecting one side and the other side of the second cam member (720), so that they may move elastically without being ejected from the first hinge module (700). In one embodiment, the third spring (1030) and the fourth spring (1040) may be arranged to apply an elastic force toward the first cam member (710) and the second cam member (720) between the first spring (1010) and the second spring (1020).

[0095] FIG. 11 is a drawing showing a first shaft, a second shaft, and a plurality of gear members coupled to a first arm, a second arm, and a first cam assembly of a first hinge module according to one embodiment.

[0096] Referring to FIG. 11, according to one embodiment, a plurality of first gear members (651) may be disposed between a first arm (611) and a second arm (612). For example, a plurality of first gear members (651) may be disposed between a first through hole (801) of the first arm (611) and a third through hole (803) of the second arm (612). For example, a plurality of first gear members (651) may be disposed to be in contact with a first cam member (710) between the first through hole (801) and the third through hole (803).

[0097] Referring to FIG. 11, according to one embodiment, a plurality of first gear members (651) may include a first gear member (1110) and a second gear member (1120), but are not limited thereto. According to one embodiment, the first gear member (1110) and the second gear member (1120) may be disposed between a first through hole (801) and a third through hole (803). According to one embodiment, the first through hole (801) may include a first gear portion (1111). For example, the first gear portion (1111) may be formed along a side connecting one side and the other side of one side of the first arm (611) where the first through hole (801) is formed. For example, the first gear portion (1111) may be formed along the outer surface of one side of the first arm (611) that includes the first through hole (801). According to one embodiment, the third through hole (803) may include a second gear portion (1112). For example, the second gear portion (1112) may be formed along a side connecting one side and the other side of one side of the second arm (612) where the third through hole (803) is formed. For example, the second gear portion (1112) may be formed along the outer surface of one side of the second arm (612) that includes the third through hole (803).

[0098] Referring to FIG. 11, according to one embodiment, the first gear member (1110) may be formed to be coupled with the first gear portion (1111) of the first through hole (801) and the second gear member (1120). According to one embodiment, the second gear member (1120) may be formed to be coupled with the first gear member (1110) and the second gear portion (1112) of the third through hole (803). According to one embodiment, while the foldable electronic device (300) is folded or unfolded, the first gear member (1110), the second gear member (1120), the first gear portion (1111) of the first arm (611), and the second gear portion (1112) of the second arm (612) may be coupled to rotate with each other. For example, the shapes of the first gear member (1110), the second gear member (1120), the first gear portion (1111) of the first arm (611), and the second gear portion (1112) of the second arm (612) can each be formed in a shape that allows them to rotate by interlocking with each other.

[0099] Referring to FIG. 11, according to one embodiment, the first gear member (1110) may include a fifth cam portion (905). For example, the fifth cam portion (905) may be formed toward the first cam member (710) while the first gear member (1110) is positioned between the first gear portion (1111) of the first through hole (801) and the second gear member (1120). According to one embodiment, the second gear member (1120) may include a sixth cam portion (906). For example, the sixth cam portion (906) may be formed toward the first cam member (710) while the second gear member (1120) is positioned between the second gear portion (1112) of the third through hole (803) and the first gear member (1110).

[0100] Referring to FIG. 11, according to one embodiment, the first cam member (710) may include a seventh cam portion (907) corresponding to the fifth cam portion (905) of the first gear member (1110) and an eighth cam portion (908) corresponding to the sixth cam portion (906) of the second gear member (1120). For example, the first cam member (710) may include cam portions (seventh cam portion (907), eighth cam portion (908)) corresponding to the cam portions (fifth cam portion (905), sixth cam portion (906)) of a plurality of gear members (first gear member (1110), second gear member (1120)). For example, the seventh cam portion (907) and the eighth cam portion (908) may be formed between the third cam portion (903) and the fourth cam portion (904). For example, the seventh cam portion (907) may be formed to contact the fifth cam portion (905) of the first gear member (1110). For example, the eighth cam portion (908) may be formed to contact the sixth cam portion (906) of the second gear member (1120).

[0101] Referring to FIG. 11, according to one embodiment, a first shaft bracket (661) including a plurality of holes can be coupled to a first shaft (601), a second shaft (602), and a plurality of first gear members (651). For example, the first shaft (601), the second shaft (602), and the plurality of first gear members (651) can be fastened to the plurality of holes of the first shaft bracket (661) and fixed to a first hinge module (700). For example, the first shaft bracket (661) can prevent the first shaft (601), the second shaft (602), and the plurality of first gear members (651) from moving out of the first hinge module (700).

[0102] FIG. 12 is a drawing showing a second cam assembly coupled to a first shaft and a second shaft of a first hinge module according to one embodiment.

[0103] Referring to FIG. 12, according to one embodiment, the third cam member (730) may include a ninth through hole (809) formed on one side and a tenth through hole (810) formed on the other side opposite to the one side. For example, the ninth through hole (809) may be formed to penetrate one side of the third cam member (730) and the other side opposite to the one side. For example, the ninth through hole (809) may be formed to correspond to the second through hole (802) of the first arm (611). For example, the tenth through hole (810) may be formed to penetrate one side of the third cam member (730) and the other side opposite to the one side. For example, the tenth through hole (810) may be formed to correspond to the fourth through hole (804) of the second arm (612).

[0104] Referring to FIG. 12, according to one embodiment, the third cam member (730) may include a first cam portion (911) formed to surround a ninth through hole (809) and a second cam portion (912) formed to surround a tenth through hole (810). For example, with the first shaft (601) passing through the ninth through hole (809) and the third cam member (730) positioned adjacent to the first arm (611) and the second arm (612), the first cam portion (911) may be positioned to contact the ninth cam portion (909), and the second cam portion (912) may be positioned to contact the tenth cam portion (910). For example, the 11th cam portion (911) may be formed in a shape that engages with the 9th cam portion (909), and the 12th cam portion (912) may be formed in a shape that engages with the 10th cam portion (910). For example, the 11th cam portion (911) may be formed toward the 9th cam portion (909), and the 12th cam portion (912) may be formed toward the 10th cam portion (910).

[0105] Referring to FIG. 12, according to one embodiment, a fourth cam member (740) spaced apart from a third cam member (730) may include a first through hole (811) formed on one side and a second through hole (812) formed on the other side opposite to the one side. For example, the first through hole (811) may be formed to penetrate one side of the fourth cam member (740) and the other side opposite to the one side. For example, the second through hole (812) may be formed to penetrate one side of the fourth cam member (740) and the other side opposite to the one side.

[0106] Referring to FIG. 12, according to one embodiment, a plurality of second elastic members (780) may be disposed between a third cam member (730) and a fourth cam member (740). According to one embodiment, the plurality of second elastic members (780) may include a fifth spring (1050), a sixth spring (1060), a seventh spring (1070), and an eighth spring (1080). However, the types of the plurality of second elastic members (780) are not limited to springs, and the number of springs is not limited to FIG. 10.

[0107] Referring to FIG. 12, according to one embodiment, a fifth spring (1050) may be positioned between the ninth through hole (809) of the third cam member (730) and the eleventh through hole (811) of the fourth cam member (740). For example, the fifth spring (1050) may be positioned to apply an elastic force toward the third cam member (730) and the fourth cam member (740) between the ninth through hole (809) and the eleventh through hole (811). For example, the fifth spring (1050) may apply an elastic force to the third cam member (730) and the fourth cam member (740) in a direction parallel to the first shaft (601) and the second shaft (602). According to one embodiment, the fifth spring (1050) may be fixed by being penetrated by the first shaft (601). For example, the fifth spring (1050) can move elastically without being dislodged from the outside of the first hinge module (700) by the first shaft (601) positioned to pass through the fifth spring (1050).

[0108] Referring to FIG. 12, according to one embodiment, a sixth spring (1060) may be positioned between the tenth through hole (810) of the third cam member (730) and the twelfth through hole (812) of the fourth cam member (740). For example, the sixth spring (1060) may be positioned to apply an elastic force toward the third cam member (730) and the fourth cam member (740) between the tenth through hole (810) and the twelfth through hole (812). For example, the sixth spring (1060) may apply an elastic force to the third cam member (730) and the fourth cam member (740) in a direction parallel to the first shaft (601) and the second shaft (602). According to one embodiment, the sixth spring (1060) may be fixed by being penetrated by the second shaft (602). For example, the sixth spring (1060) can move elastically without being dislodged from the outside of the first hinge module (700) by the second shaft (602) positioned to pass through the sixth spring (1060).

[0109] Referring to FIG. 12, according to one embodiment, the seventh spring (1070) and the eighth spring (1080) may be positioned between the fifth spring (1050) and the sixth spring (1060). For example, the seventh spring (1070) and the eighth spring (1080) may be fixed by the third cam member (730) and the fourth cam member (740). For example, each of the seventh spring (1070) and the eighth spring (1080) may be fixed by a protrusion formed in the -y-axis direction on a connecting part connecting one side and the other side of the third cam member (730) and a protrusion formed in the +y-axis direction on a connecting part connecting one side and the other side of the fourth cam member (740), so that they may move elastically without being ejected from the first hinge module (700). In one embodiment, the seventh spring (1070) and the eighth spring (1080) may be arranged to apply elastic force toward the third cam member (730) and the fourth cam member (740) between the fifth spring (1050) and the sixth spring (1060).

[0110] Referring to FIG. 12, according to one embodiment, the first shaft (601) may be positioned to pass through the ninth through hole (809) of the third cam member (730), the fifth spring (1050), and the eleventh through hole (811) of the fourth cam member (740) formed on one side of the second cam assembly (622). According to one embodiment, the second shaft (602) may be positioned to pass through the tenth through hole (810) of the third cam member (730), the sixth spring (1060), and the twelfth through hole (812) of the fourth cam member (740) formed on the other side opposite to one side of the second cam assembly (622). According to one embodiment, the second cam assembly (622) may be fixed to the first hinge module (700) by the first shaft (601) and the second shaft (602).

[0111] FIG. 13 is a drawing showing a first fixing bracket coupled to a first shaft and a second shaft of a first hinge module according to one embodiment.

[0112] Referring to FIG. 13, according to one embodiment, the first hinge module (700) may include a first fixing bracket (1200). For example, the first fixing bracket (1200) may include a first groove (1210) formed on one side and a second groove (1220) formed on the other side opposite to the one side. For example, the shape of the first groove (1210) may be formed to correspond to the shape of the first shaft (601). For example, the shape of the second groove (1220) may be formed to correspond to the shape of the second shaft (602).

[0113] Referring to FIG. 13, according to one embodiment, the first groove (1210) may be fastened to one end of the first shaft (601), and the second groove (1220) may be fastened to one end of the second shaft (602). Together with the first shaft bracket (661), the first fixing bracket (1200) can prevent the first shaft (601) and the second shaft (602) from detaching from the first hinge module (700).

[0114] FIG. 14 is a perspective view of a plurality of gear members according to one embodiment. FIG. 15 is a perspective view of a first cam member according to one embodiment.

[0115] Referring to FIG. 14, according to one embodiment, a plurality of gear members (651) may include a first gear member (1110) and a second gear member (1120), but are not limited thereto, and may include other gear members. Additionally, some of the gear members among the plurality of gear members (651) may be omitted.

[0116] Referring to FIG. 14, according to one embodiment, the first gear member (1110) may include a first shaft portion (1310). For example, the first shaft portion (1310) may be formed in a shape corresponding to the shape of the first shaft (601). For example, the first shaft portion (1310) may be formed in a cylindrical shape extending in the y-axis direction. According to one embodiment, the first shaft portion (1310) of the first gear member (1110) may be positioned to pass through the 13th through hole (813) of the first cam member (710). For example, the first shaft portion (1310) of the first gear member (1110) may be fixed by the first shaft bracket (661) and the 13th through hole (813). For example, one end of the first shaft portion (1310) is fixed by the 13th through hole (813) of the first cam member (710), and the other end of the first shaft portion (1310) can be fixed by the first shaft bracket (661).

[0117] Referring to FIG. 14, according to one embodiment, the second gear member (1120) may include a second shaft portion (1320). For example, the second shaft portion (1320) may be formed in a shape corresponding to the shape of the second shaft (602). For example, the second shaft portion (1320) may be formed in a cylindrical shape extending in the y-axis direction. According to one embodiment, the second shaft portion (1320) of the second gear member (1120) may be positioned to pass through the 14th through hole (814) of the first cam member (710). For example, the second shaft portion (1320) of the second gear member (1120) may be fixed by the first shaft bracket (661) and the 14th through hole (814). For example, one end of the second shaft portion (1320) is fixed by the 14th through hole (814) of the first cam member (710), and the other end of the second shaft portion (1320) can be fixed by the first shaft bracket (661).

[0118] Referring to FIG. 14, according to one embodiment, the first gear member (1110) may include a third gear portion (1113). For example, the third gear portion (1113) may be formed on the outer surface of the first shaft portion (1310). For example, the third gear portion (1113) may be formed to surround at least a portion of the outer surface of the first shaft portion (1310). According to one embodiment, the second gear member (1120) may include a fourth gear portion (1114). For example, the fourth gear portion (1114) may be formed on the outer surface of the second shaft portion (1320). For example, the fourth gear portion (1114) may be formed to surround at least a portion of the outer surface of the second shaft portion (1320).

[0119] Referring to FIG. 14, according to one embodiment, the third gear portion (1113) of the first gear member (1110) may be positioned between the first gear portion (1111) of the first arm (611) and the fourth gear portion (1114) of the second gear member (1120). For example, the third gear portion (1113) may be formed in a shape that can rotate in conjunction with the first gear portion (1111) and the fourth gear portion (1114). For example, as the first arm (611) rotates about the first shaft (601), the first gear portion (1111), the third gear portion (1113), and the fourth gear portion (1114) may rotate in conjunction with each other. According to one embodiment, the fourth gear portion (1114) of the second gear member (1120) may be positioned between the second gear portion (1112) of the second arm (612) and the third gear portion (1113) of the first gear member (1110). For example, the fourth gear portion (1114) may be formed in a shape that can rotate in conjunction with the second gear portion (1112) and the third gear portion (1113). For example, as the second arm (612) rotates about the second shaft (602), the second gear portion (1112), the third gear portion (1113), and the fourth gear portion (1114) may rotate in conjunction with each other.

[0120] Referring to FIG. 14, according to one embodiment, the first gear member (1110) may include a fifth cam portion (905). For example, the fifth cam portion (905) may be formed to surround the outer surface of the first shaft portion (1310). For example, the fifth cam portion (905) may be formed to extend from the third gear portion (1113) in the -y-axis direction. According to one embodiment, the fifth cam portion (905) may include a plurality of convex portions and a plurality of concave portions. For example, the plurality of convex portions and the plurality of concave portions of the fifth cam portion (905) may be formed alternately. For example, the plurality of convex portions of the fifth cam portion (905) may be referred to as a plurality of protrusions, and the plurality of concave portions of the fifth cam portion (905) may be referred to as a plurality of flat portions.

[0121] Referring to FIG. 14, according to one embodiment, the second gear member (1120) may include a sixth cam portion (906). For example, the sixth cam portion (906) may be formed to surround the outer surface of the second shaft portion (1320). For example, the sixth cam portion (906) may be formed to extend from the fourth gear portion (1114) in the -y-axis direction. According to one embodiment, the sixth cam portion (906) may include a plurality of convex portions and a plurality of concave portions. For example, the plurality of convex portions and the plurality of concave portions of the sixth cam portion (906) may be formed alternately. For example, the plurality of convex portions of the sixth cam portion (906) may be referred to as a plurality of protrusions, and the plurality of concave portions of the sixth cam portion (906) may be referred to as a plurality of flat portions.

[0122] According to one embodiment of the present disclosure, although only the shape of the first cam member (710) is described in FIG. 15 for convenience, the shapes of the second cam member (720), the third cam member (730), and the fourth cam member (740) may also be formed identically to the shape of the first cam member (710) described later. According to one embodiment, the second cam member (720), the third cam member (730), and the fourth cam member (740) may be formed by omitting some of the plurality of cam portions formed on the first cam member (710).

[0123] Referring to FIG. 15, according to one embodiment, the third cam portion (903), the fourth cam portion (904), the seventh cam portion (907), and the eighth cam portion (908) of the first cam member (710) may include a plurality of convex and concave portions. For example, the plurality of convex portions may be portions protruding toward the y-axis direction. For example, the plurality of convex portions may be portions protruding in a direction parallel to the first shaft (601) and the second shaft (602). For example, the plurality of convex portions may be portions protruding relative to the plurality of concave portions. For example, the plurality of convex portions and the plurality of concave portions may be formed alternately.

[0124] Referring to FIG. 15, according to one embodiment, a plurality of protrusions and a plurality of concave portions of the third cam portion (903) of the first cam member (710) may be formed in a shape corresponding to a plurality of protrusions and a plurality of concave portions formed in the first cam portion (901) of the first arm (611). For example, a plurality of protrusions and a plurality of concave portions of the third cam portion (903) may be formed to come into contact with and engage with a plurality of protrusions and a plurality of concave portions of the first cam portion (901). According to one embodiment, a plurality of protrusions and a plurality of concave portions of the fourth cam portion (904) of the first cam member (710) may be formed in a shape corresponding to a plurality of protrusions and a plurality of concave portions formed in the second cam portion (902) of the second arm (612). For example, a plurality of protrusions and a plurality of concaves of the fourth cam portion (904) may be formed to come into contact with and engage with a plurality of protrusions and a plurality of concaves of the second cam portion (902). According to one embodiment, a plurality of protrusions and a plurality of concaves of the seventh cam portion (907) of the first cam member (710) may be formed in a shape corresponding to a plurality of protrusions and a plurality of concaves formed in the fifth cam portion (905) of the first gear member (1110). For example, a plurality of protrusions and a plurality of concaves of the seventh cam portion (907) may be formed to come into contact with and engage with a plurality of protrusions and a plurality of concaves of the fifth cam portion (905). According to one embodiment, a plurality of protrusions and a plurality of concaves of the eighth cam portion (908) of the first cam member (710) may be formed in a shape corresponding to a plurality of protrusions and a plurality of concaves formed in the sixth cam portion (906) of the second gear member (1120). For example, a plurality of protrusions and a plurality of concave portions of the eighth cam portion (908) may be formed to come into contact with and interlock with a plurality of protrusions and a plurality of concave portions of the sixth cam portion (906).

[0125] FIG. 16 is a drawing showing the arrangement of the first cam portion and the third cam portion and the arrangement of the ninth cam portion and the eleventh cam portion in an unfolded state of a foldable electronic device according to one embodiment. FIG. 17 is a drawing showing the arrangement of the first cam portion and the third cam portion and the arrangement of the ninth cam portion and the eleventh cam portion while the foldable electronic device according to one embodiment is being folded. FIG. 18 is a drawing showing the arrangement of the first cam portion and the third cam portion and the arrangement of the ninth cam portion and the eleventh cam portion in a folded state of a foldable electronic device according to one embodiment.

[0126] For convenience, in FIGS. 16 to 18, only the arrangement between the first cam portion (901) of the first arm (611) and the third cam portion (903) of the first cam member (710), and the arrangement between the ninth cam portion (909) of the first arm (611) and the eleventh cam portion (911) of the third cam member (730) are described, but the arrangement between the second cam portion (902) of the second arm (612) and the fourth cam portion (904) of the first cam member (710), the arrangement between the fifth cam portion (905) of the first gear member (1110) and the seventh cam portion (907) of the first cam member (710), the arrangement between the sixth cam portion (906) of the second gear member (1120) and the eighth cam portion (908) of the first cam member (710), and the tenth cam of the second arm (612) The arrangement between the portion (910) and the 12th cam portion (912) of the third cam member (730), the arrangement between the 13th cam portion (913) of the third gear member (1130) to be described later and the 15th cam portion (915) of the third cam member (730), and the arrangement between the 14th cam portion (914) of the fourth gear member (1140) and the 16th cam portion (916) of the third cam member (730) can be described in the same way as described in FIGS. 16 to 18.

[0127] Referring to FIGS. 16 to 19, according to one embodiment, the first cam portion (901) of the first arm (611) may include a plurality of convex portions. For example, the plurality of convex portions of the first cam portion (901) of the first arm (611) may include a first convex portion (1410). According to one embodiment, the third cam portion (903) of the first cam member (710) may include a plurality of convex portions and a plurality of concave portions. For example, the plurality of convex portions of the third cam portion (903) of the first cam member (710) may include a second convex portion (1420), and the plurality of concave portions of the third cam portion (903) may include a first concave portion (1510) and a second concave portion (1520).

[0128] Referring to FIGS. 16 to 19, according to one embodiment, the ninth cam portion (909) of the first arm (611) may include a plurality of convex portions. For example, the plurality of convex portions of the ninth cam portion (909) of the first arm (611) may include a third convex portion (1430). According to one embodiment, the eleventh cam portion (911) of the third cam member (730) may include a plurality of convex portions and a plurality of concave portions. For example, the plurality of convex portions of the eleventh cam portion (911) of the third cam member (730) may include a fourth convex portion (1440), and the plurality of concave portions of the eleventh cam portion (911) may include a third concave portion (1530) and a fourth concave portion (1540).

[0129] Referring to FIG. 16, according to one embodiment, in the unfolded state of the foldable electronic device (300), the first convex portion (1410) of the first cam portion (901) of the first arm (611) may be positioned at a location corresponding to the first concave portion (1510) of the third cam portion (903) of the first cam member (710). According to one embodiment, as the first convex portion (1410) is positioned at a location corresponding to the first concave portion (1510), the first cam member (710) may compress a plurality of first elastic members (770) in a direction parallel to the first shaft (601) and / or the second shaft (602) (e.g., -y-axis direction). For example, the compressed plurality of first elastic members (770) may have a first length. According to one embodiment, a plurality of compressed first elastic members (770) apply a first elastic force toward a first cam member (710), and the first cam member (710) receiving the first elastic force can push the first arm (611) in the same direction as the direction of the elastic force (e.g., +y-axis direction).

[0130] Referring to FIG. 16, according to one embodiment, in the unfolded state of the foldable electronic device (300), the third convex portion (1430) of the ninth cam portion (909) of the first arm (611) may be positioned at a location corresponding to the third concave portion (1530) of the eleventh cam portion (911) of the third cam member (730). According to one embodiment, as the third convex portion (1430) is positioned at a location corresponding to the third concave portion (1530), the third cam member (730) may compress a plurality of second elastic members (780) in a direction parallel to the first shaft (601) and / or the second shaft (602) (e.g., in the -y-axis direction). For example, the compressed plurality of second elastic members (780) may have a first length. According to one embodiment, a plurality of compressed second elastic members (780) apply a first elastic force toward a third cam member (730), and the third cam member (730) receiving the first elastic force can push the first arm (611) in the same direction as the direction of the elastic force (e.g., +y-axis direction).

[0131] Referring to FIG. 17, according to one embodiment, while the foldable electronic device (300) is being folded, the first convex portion (1410) of the first cam portion (901) may come into contact with the second convex portion (1420) of the third cam portion (903). For example, while the foldable electronic device (300) is being folded, the first convex portion (1410) may be positioned to face the second convex portion (1420). According to one embodiment, as the first convex portion (1410) is positioned to come into contact with the second convex portion (1420), a plurality of first elastic members (770) may be compressed to have a second length shorter than the first length in a direction parallel to the first shaft (601) and / or the second shaft (602) (e.g., -y-axis direction). According to one embodiment, a plurality of first elastic members (770) compressed to have a second length apply a second elastic force greater than the first elastic force to the first cam member (710), and the first cam member (710) receiving the second elastic force can push the first arm (611) more strongly than when the foldable electronic device (300) is unfolded.

[0132] Referring to FIG. 17, according to one embodiment, while the foldable electronic device (300) is being folded, the third convex portion (1430) of the ninth cam portion (909) may come into contact with the fourth convex portion (1440) of the eleventh cam portion (911). For example, while the foldable electronic device (300) is being folded, the third convex portion (1430) may be positioned to face the fourth convex portion (1440). According to one embodiment, as the third convex portion (1430) is positioned to come into contact with the fourth convex portion (1440), a plurality of second elastic members (780) may be compressed to have a second length shorter than the first length in a direction parallel to the first shaft (601) and / or the second shaft (602) (e.g., in the -y-axis direction). According to one embodiment, a plurality of second elastic members (780) compressed to have a second length apply a second elastic force greater than the first elastic force to the third cam member (730), and the third cam member (730) receiving the second elastic force can push the first arm (611) more strongly than when the foldable electronic device (300) is unfolded.

[0133] Referring to FIG. 18, according to one embodiment, in a folded state of a foldable electronic device (300), a first convex portion (1410) of a first cam portion (901) may be positioned at a location corresponding to a second concave portion (1520) of a third cam portion (903). According to one embodiment, as the first convex portion (1410) is positioned at a location corresponding to a second concave portion (1520), the first cam member (710) may compress a plurality of first elastic members (770) into a third length that is longer than the second length and shorter than the first length in a direction parallel to the first shaft (601) and / or the second shaft (602) (e.g., -y-axis direction). According to one embodiment, a plurality of first elastic members (770) compressed to a third length apply a third elastic force greater than the first elastic force and less than the second elastic force toward the first cam member (710), and the first cam member (710) receiving the third elastic force can push the first arm (611) more strongly than when the foldable electronic device (300) is unfolded and less strongly than when the foldable electronic device (300) is folded.

[0134] Referring to FIG. 18, according to one embodiment, in a folded state of the foldable electronic device (300), the third convex portion (1430) of the ninth cam portion (909) may be positioned at a location corresponding to the fourth concave portion (1540) of the eleventh cam portion (911). According to one embodiment, as the third convex portion (1430) is positioned at a location corresponding to the fourth concave portion (1540), the third cam member (730) may compress a plurality of second elastic members (780) into a third length that is longer than the second length and shorter than the first length in a direction parallel to the first shaft (601) and / or the second shaft (602) (e.g., -y-axis direction). According to one embodiment, a plurality of second elastic members (780) compressed to a third length apply a third elastic force greater than the first elastic force and smaller than the second elastic force toward the third cam member (730), and the third cam member (730) receiving the third elastic force can push the first arm (611) more strongly than when the foldable electronic device (300) is unfolded and less strongly than when the foldable electronic device (300) is folded.

[0135] Referring to FIGS. 16 to 19, the shape of the second convex portion (1420) of the third cam portion (903) of the first cam member (710) may be formed differently from the shape of the fourth convex portion (1440) of the eleventh cam portion (911) of the third cam member (730). For example, the width of the fourth convex portion (1440) may be formed wider than the width of the second convex portion (1420). If the width of the fourth convex portion (1440) is formed wider than the width of the second convex portion (1420), the fourth convex portion (1440) may be positioned so as to overlap at least a portion with the third convex portion (1430) of the first arm (611) when the foldable electronic device (300) is folded or unfolded. For example, even when the foldable electronic device (300) is folded or unfolded, if the fourth convex portion (1440) is positioned to overlap with at least a portion of the third convex portion (1430), the length of the plurality of second elastic members (780) compressed by the third cam member (730) including the fourth convex portion (1440) which is formed relatively wider may be shorter than the length of the plurality of first elastic members (770) compressed by the first cam member (710) including the second convex portion (1420) which is formed relatively narrower. According to one embodiment, the third cam member (730) including the fourth convex portion (1440) formed with a relatively wide width receives a stronger elastic force than the first cam member (710) including the second convex portion (1420) formed with a relatively narrow width, and the third cam member (730) can push the first arm (611) more strongly than the first cam member (710).

[0136] FIG. 19 is a drawing showing a plurality of first elastic members of a first cam assembly and a plurality of second elastic assemblies of a second cam assembly according to one embodiment.

[0137] Referring to FIG. 19, according to one embodiment, the first cam member (710) includes four cam portions that are in contact with and mesh with the first arm (611), the second arm (612), the first gear member (1110), and the second gear member (1120), and the third cam member (730) includes two cam portions that are in contact with and mesh with the first arm (611) and the second arm (612), so that the contact area of ​​the cam portions of the first cam member (710) in contact with other members may be relatively larger than that of the third cam member (730). For example, by forming the contact area of ​​the first cam member (710) in contact with other members to be larger than the contact area of ​​the third cam member (730) in contact with other members, the durability of the four cam portions of the first cam member (710) may be improved. For example, by forming the contact area of ​​the first cam member (710) to be larger than the contact area of ​​the third cam member (730), the four cam portions of the first cam member (710) may experience less wear than the two cam portions of the third cam member (730).

[0138] Referring to FIG. 19, according to one embodiment, a plurality of first elastic members (770) of a first cam assembly (621) comprising a first cam member (710) having relatively higher durability than a third cam member (730) may be formed to have a stronger elastic force than a plurality of second elastic members (780) of a second cam assembly (622) comprising a third cam member (730) having relatively lower durability. For example, the sum of the elastic forces of the plurality of first elastic members (770) may be greater than the sum of the elastic forces of the plurality of second elastic members (780). For example, each of the first spring (1010), second spring (1020), third spring (1030), and fourth spring (1040) of the plurality of first elastic members (770) may be formed of a material having an elastic force greater than the elastic force of each of the fifth spring (1050), sixth spring (1060), seventh spring (1070), and eighth spring (1080) of the plurality of second elastic members (780). For example, the net force of the torque force applied by the first cam assembly (621) in a direction opposite to the rotation of the foldable electronic device (300) while the foldable electronic device (300) is folded or unfolded may be greater than the net force of the torque force applied by the second cam assembly (622) to the foldable electronic device (300).

[0139] Referring to FIG. 19, according to one embodiment, even if the sum of the elastic forces of a plurality of first elastic members (770) is formed to be greater than the sum of the elastic forces of a plurality of second elastic members (780), the first cam member (710) may not wear out easily because the first cam member (710) includes more cam portions than the third cam member (730). For example, the durability of the first cam assembly (621) and the second cam assembly (622) can be implemented to be the same or similar by forming the sum of the elastic forces of a plurality of first elastic members (770) to be greater than the sum of the elastic forces of a plurality of second elastic members (780) while the first cam member (710) includes more cam portions than the third cam member (730).

[0140] Referring to FIG. 19, according to one embodiment, the elasticity of the third spring (1030) and the fourth spring (1040) among the plurality of first elastic members (770) can be formed lower than the elasticity of the first spring (1010) and the second spring (1020) to improve the durability of the first cam member (710). However, when the elasticity of the third spring (1030) and the fourth spring (1040) is formed lower than the elasticity of the first spring (1010) and the second spring (1020), the durability may be improved compared to when the first spring (1010) to the fourth spring (1040) are formed to have the same elasticity, but the resultant force of the torque applied to the foldable electronic device (300) may be relatively lower.

[0141] FIG. 20 is a front view of a first hinge module including a plurality of other gear members according to one embodiment.

[0142] Referring to FIG. 20, according to one embodiment, the first hinge module (700) may include a plurality of other gear members (1800). For example, the plurality of other gear members (1800) may be positioned between the second through hole (802) of the first arm (611) and the fourth through hole (804) of the second arm (612). For example, the plurality of other gear members (1800) may rotate in conjunction with the first arm (611) and the second arm (612) between the second through hole (802) of the first arm (611) and the fourth through hole (804) of the second arm (612).

[0143] Referring to FIG. 20, according to one embodiment, a plurality of other gear members (1800) may include a third gear member (1130) and a fourth gear member (1140). For example, the shape of the third gear member (1130) and the fourth gear member (1140) may correspond to the shape of the first gear member (1110) and the second gear member (1120) shown in FIG. 14. For example, the third gear member (1130) may rotate by engaging with the second through hole (802) of the first arm (611) and the fourth gear member (1140) while the foldable electronic device (300) is folded or rotated. For example, the fourth gear member (1140) can rotate by engaging with the fourth through hole (804) and the third gear member (1130) between the fourth through hole (804) of the second arm (612) and the third gear member (1130) while the foldable electronic device (300) is folded or rotated.

[0144] Referring to FIG. 20, according to one embodiment, the third gear member (1130) may include a 13th cam portion (913) formed toward the third cam member (730), and the fourth gear member (1140) may include a 14th cam portion (914) formed toward the third cam member (730). According to one embodiment, the third cam member (730) may include a 15th cam portion (915) corresponding to the 13th cam portion (913) of the third gear member (1130), and may include a 16th cam portion (916) corresponding to the 14th cam portion (914) of the fourth gear member (1140).

[0145] Referring to FIG. 20, according to one embodiment, the third cam member (730) may include a 11th cam portion (911) in contact with the 9th cam portion (909) of the first arm (611), a 12th cam portion (912) in contact with the 10th cam portion (910) of the second arm (612), a 15th cam portion (915) in contact with the 13th cam portion (913) of the third gear member (1130), and a 16th cam portion (916) in contact with the 14th cam portion (914) of the fourth gear member (1140). For example, the third cam member (730) may further include the 15th cam portion (915) and the 16th cam portion (916) to increase the contact area with other members. For example, as the contact surface of the cam parts of the third cam member (730) in contact with other members increases, the durability of the cam parts of the third cam member (730) can be improved. For example, as the contact surface of the cam parts of the third cam member (730) in contact with other members increases, wear of the cam parts of the third cam member (730) may not occur easily.

[0146] Referring to FIG. 20, according to one embodiment, as the number of cam portions of the third cam member (730) increases, the sum of the elastic forces of the plurality of second elastic members (780) of the second cam assembly (622) can be formed to be equal to the sum of the plurality of first elastic members (770) of the first cam assembly (621). For example, the fifth spring (1050), the sixth spring (1060), the seventh spring (1070), and the eighth spring (1080) can each be formed of a material having the same elastic force as the first spring (1010), the second spring (1020), the third spring (1030), and the fourth spring (1040). According to one embodiment, even if the fifth spring (1050), the sixth spring (1060), the seventh spring (1070), and the eighth spring (1080) are formed of a material having strong elasticity, the number of cam portions formed in the third cam member (730) is increased so that the durability of the second cam assembly (622) is improved, and the resultant force of the torque force applied by the second cam assembly (622) to the foldable electronic device (300) can be increased.

[0147] FIG. 21 is a drawing showing elastic members of a hinge structure according to one embodiment.

[0148] Referring to FIG. 21, according to one embodiment, the first hinge assembly (510) may include a first hinge module (700) comprising a first cam assembly (621) comprising a plurality of first elastic members (770) and a second cam assembly (622) comprising a plurality of second elastic members (780). According to one embodiment, the second hinge assembly (520) may include a second hinge module (800) comprising a third cam assembly (623) comprising a plurality of third elastic members (1930) and a fourth cam assembly (624) comprising a plurality of fourth elastic members (1940). According to one embodiment, the second hinge assembly (520) may include a third hinge module (900) comprising a fifth cam assembly (625) comprising a plurality of fifth elastic members (1950) and a sixth cam assembly (626) comprising a plurality of sixth elastic members (1960). According to one embodiment, the third hinge assembly (530) may include a fourth hinge module (1000) comprising a seventh cam assembly (627) comprising a plurality of seventh elastic members (1970) and an eighth cam assembly (628) comprising a plurality of eighth elastic members (1980).

[0149] Referring to FIG. 21, according to one embodiment, the elastic force of each of the plurality of first elastic members (770) to the plurality of eighth elastic members (1980) may be formed identically or differently from one another. For example, the elastic force of the springs included in each of the plurality of first elastic members (770) to the plurality of eighth elastic members (1980) may be formed differently so that the elastic force of each of the plurality of first elastic members (770) to the plurality of eighth elastic members (1980) may be formed differently from one another.

[0150] Referring to FIG. 21, according to one embodiment, the elastic force of some of the plurality of first elastic members (770) to the plurality of eighth elastic members (1980) can be formed low to improve the durability of the hinge structure (410). According to one embodiment, while the foldable electronic device (300) is folded or unfolded, the hinge structure (410) can have the elastic force of some of the plurality of first elastic members (770) to the plurality of eighth elastic members (1980) formed high to increase the resultant force of the torque force acting in the opposite direction to the rotational direction of the first housing (310) and / or the second housing (320).

[0151] According to one embodiment of the present disclosure, by adjusting the elastic force of a plurality of first elastic members (770) to a plurality of eighth elastic members (1980), the durability or resultant force of the torque force of the hinge structure (410) can be adjusted.

[0152] FIG. 22 is a drawing showing a hinge module including a spiral structure according to one embodiment. For example, FIG. 22 may be a drawing showing an example of a spiral structure in which the first arm (611) and the second arm (612) are not linked by a plurality of first gear members (651), but are linked by a slider member (2000).

[0153] Referring to FIG. 22, according to one embodiment, the first hinge module (700) may include a slider member (2000). For example, the slider member (2000) may be positioned between the first cam assembly (621) and the second cam assembly (622). For example, the slider member (2000) may translate in a direction parallel to the first shaft (601) and the second shaft (602) between the first cam assembly (621) and the second cam assembly (622). For example, the slider member (2000) may guide the rotation of the first arm (611) and the second arm (612).

[0154] Referring to FIG. 22, according to one embodiment, the slider member (2000) may include a first spiral portion (2010) and a second spiral portion (2020). For example, the first spiral portion (2010) may be formed on one side of the slider member (2000). For example, the second spiral portion (2020) may be formed on the other side opposite to the one side of the slider member (2000). For example, the first spiral portion (2010) may be a portion connected to the first arm (611). For example, the second spiral portion (2020) may be a portion connected to the second arm (612).

[0155] Referring to FIG. 22, according to one embodiment, while the first arm (611) is rotating, the rotation of the first arm (611) may be guided by the first spiral portion (2010). For example, as the first arm (611) rotates while in contact with the first spiral portion (2010), the slider member (2000) may translate in a direction parallel to the first shaft (601). According to one embodiment, while the second arm (612) is rotating, the rotation of the second arm (612) may be guided by the second spiral portion (2020). For example, as the second arm (612) rotates while in contact with the second spiral portion (2020), the slider member (2000) may translate in a direction parallel to the second shaft (602).

[0156] Referring to FIG. 22, while the foldable electronic device (300) is being folded or unfolded, the slider member (2000) may be translated in a direction parallel to the first shaft (601) and / or the second shaft (602). According to one embodiment, as the slider member (2000) is translated, the slider member (2000) may compress a plurality of first elastic members (770) of the first cam assembly (621). For example, the compressed plurality of first elastic members (770) may receive an elastic force toward the slider member (2000) in a direction opposite to the direction in which the plurality of first elastic members (770) were compressed. According to one embodiment, as the slider member (2000) is translated, the slider member (2000) may compress a plurality of second elastic members (780) of the second cam assembly (622). For example, the compressed plurality of second elastic members (780) may receive an elastic force toward the slider member (2000) in a direction opposite to the direction in which the plurality of second elastic members (780) are compressed.

[0157] Referring to FIG. 22, according to one embodiment, a first arm (611) and a second arm (612) in contact with a slider member (2000) that receives elastic force from a first cam assembly (621) and a second cam assembly (622) can receive a torque force. For example, the first arm (611) and the second arm (612) can receive a torque force acting in a direction opposite to the direction in which the first arm (611) and the second arm (612) rotate.

[0158] The contents described in FIGS. 1 to 21 can be applied in the same way to FIG. 22.

[0159] FIG. 23 is a drawing showing connecting members and rotating arms coupled to a first hinge module according to one embodiment.

[0160] Referring to FIG. 23, according to one embodiment, one side of the first hinge module (700) is coupled to the first connecting member (641), and the other side opposite to the one side of the first hinge module (700) may be coupled to the second connecting member (642). For example, the first arm (611) may be coupled to the first connecting member (641), and the second arm (612) may be coupled to the second connecting member (642). For example, a portion extending in the -x-axis direction from the portion connecting the one side of the first arm (611) where the first through hole (801) is formed and the other side where the second through hole (802) is formed may be coupled to the first connecting member (641). For example, a portion extending in the +x axis direction from the portion connecting the side where the third through hole (803) of the second arm (612) is formed and the other side where the fourth through hole (804) is formed can be combined with the second connecting member (642).

[0161] Referring to FIG. 23, according to one embodiment, the first hinge assembly (510) may include a first rotating arm (631) coupled to a first connecting member (641) and a second rotating arm (632) coupled to a second connecting member (642). According to one embodiment, as the first rotating arm (631) and the second rotating arm (632) rotate, the foldable electronic device (300) may be folded or unfolded. According to one embodiment, the first connecting member (641) may be connected to a first housing (310) of the foldable electronic device (300), and the second connecting member (642) may be connected to a second housing (320). According to one embodiment, as the first rotating arm (631) and the second rotating arm (632) rotate, the first arm (611) coupled to the first connecting member (641) and the second arm (612) connected to the second connecting member (642) can be rotated.

[0162] FIG. 24 is a drawing showing a support plate and a rotating bracket coupled to connecting members and rotating arms according to one embodiment.

[0163] Referring to FIG. 24, according to one embodiment, the first hinge assembly (510) may include a first rotation bracket (671) capable of guiding or supporting the rotation of the first rotation arm (631) and the rotation of the second rotation arm (632). According to one embodiment, the first hinge assembly (510) may include a first support plate (681) capable of supporting the flexible display (340). For example, while the foldable electronic device (300) is folded or unfolded, the first support plate (681) may support the folding portion of the flexible display (340). According to one embodiment, the first hinge module (700) may be positioned between the first support plate (681) and the first rotation bracket (671). For example, the first support plate (681) can be coupled to the first rotating bracket (671) and positioned in the central part of the first hinge module (700).

[0164] The problem to be solved according to one embodiment of the present disclosure may be as follows.

[0165] According to one embodiment of the present disclosure, a foldable electronic device with improved durability can be provided by preventing or reducing wear on the cam portions of the arms and the cam portions of the cam members.

[0166] According to one embodiment of the present disclosure, a foldable electronic device with improved durability can be provided by configuring the elastic force of elastic members disposed between cam members in various ways.

[0167] A foldable electronic device according to one embodiment of the present disclosure may include a first housing, a second housing, and a hinge assembly rotatably connecting the first housing and the second housing. The hinge assembly may include a first arm having a first through hole and a second through hole corresponding to a first rotation axis. The hinge assembly may include a first shaft penetrating the first through hole and the second through hole. The hinge assembly may include a second arm having a third through hole and a fourth through hole corresponding to a second rotation axis parallel to the first rotation axis. The hinge assembly may include a second shaft penetrating the third through hole and the fourth through hole. The hinge assembly may include a first cam member disposed between the first arm and the second arm. The hinge assembly may include a second cam member disposed between the first arm and the second arm. The hinge assembly may include a plurality of first elastic members disposed between the first cam member and the second cam member. The hinge assembly may include a third cam member connected to the second through hole and the fourth through hole through the first shaft and the second shaft. The hinge assembly may include a fourth cam member disposed spaced apart from the third cam member. The hinge assembly may include a plurality of second elastic members disposed between the third cam member and the fourth cam member. The sum of the elastic forces of the plurality of first elastic members may be greater than the sum of the elastic forces of the plurality of second elastic members.

[0168] According to one embodiment of the present disclosure, the first arm may include a first cam portion formed facing the first cam member and surrounding the first through hole. The second arm may include a second cam portion formed facing the first cam member and surrounding the third through hole. The first cam member may include a third cam portion corresponding to the first cam portion of the first arm and a fourth cam portion corresponding to the second cam portion of the second arm.

[0169] According to one embodiment of the present disclosure, the hinge assembly may include a plurality of gear members disposed between the first through hole of the first arm and the third through hole of the second arm. The hinge assembly may include a first cam member that includes cam portions corresponding to the cam portions of the plurality of gear members.

[0170] According to one embodiment of the present disclosure, the plurality of gear members may include a first gear member and a second gear member. The first gear member may include a fifth cam portion formed toward the first cam member. The second gear member may include a sixth cam portion formed toward the first cam member. The first cam member may include a seventh cam portion corresponding to the fifth cam portion of the first gear member and an eighth cam portion corresponding to the sixth cam portion of the second gear member.

[0171] According to one embodiment of the present disclosure, the first gear member may be coupled with the first gear portion including the first through hole of the first arm and the second gear member. The second gear member may be coupled with the first gear member and the second gear portion including the third through hole of the second arm.

[0172] According to one embodiment of the present disclosure, the first cam member may include a fifth through hole formed on one side of the first cam member corresponding to the first through hole of the first arm, and a sixth through hole formed on the other side opposite to the one side of the first cam member corresponding to the third through hole of the second arm. The first shaft may pass through the first through hole of the first arm and the fifth through hole of the first cam member. The second shaft may pass through the third through hole of the second arm and the sixth through hole of the first cam member.

[0173] According to one embodiment of the present disclosure, the third cam portion of the first cam member surrounds the fifth through hole, and the fourth cam portion of the first cam member surrounds the sixth through hole.

[0174] According to one embodiment of the present disclosure, the plurality of first elastic members may include a first spring and a second spring. The first spring may be secured by the first shaft penetrating the first cam member and the second cam member. The second spring may be secured by the second shaft penetrating the first cam member and the second cam member.

[0175] According to one embodiment of the present disclosure, the plurality of first elastic members may further include a third spring and a fourth spring. The third spring and the fourth spring may be disposed between the first spring and the second spring.

[0176] According to one embodiment of the present disclosure, the first arm may include a ninth cam portion formed facing the third cam member while surrounding the second through hole. The second arm may include a tenth cam portion formed facing the third cam member while surrounding the fourth through hole. The third cam member may include an eleventh cam portion corresponding to the ninth cam portion of the first arm and a twelfth cam portion corresponding to the tenth cam portion of the second arm.

[0177] According to one embodiment of the present disclosure, the plurality of second elastic members may include a fifth spring and a sixth spring. The fifth spring may be secured by the first shaft penetrating the third cam member and the fourth cam member. The sixth spring may be secured by the second shaft penetrating the third cam member and the fourth cam member.

[0178] According to one embodiment of the present disclosure, the plurality of second elastic members may further include a seventh spring and an eighth spring. The seventh spring and the eighth spring may be disposed between the fifth spring and the sixth spring.

[0179] According to one embodiment of the present disclosure, the first cam portion of the first arm may include a first convex portion that contacts the third cam portion of the first cam member. The ninth cam portion of the first arm may include a second convex portion that contacts the eleventh cam portion of the third cam member. The shape of the first convex portion of the first cam portion may be different from the shape of the second convex portion of the ninth cam portion.

[0180] According to one embodiment of the present disclosure, the width of the second convex portion of the ninth cam portion may be larger than the width of the first convex portion of the first cam portion.

[0181] According to one embodiment of the present disclosure, the plurality of first elastic members may be arranged to apply an elastic force toward the first cam member and the second cam member. The plurality of second elastic members may be arranged to apply an elastic force toward the third cam member and the fourth cam member.

[0182] According to one embodiment of the present disclosure, the hinge assembly may include a plurality of other gear members disposed between the second through hole of the first arm and the fourth through hole of the second arm. The third cam member may include cam portions corresponding to the cam portions of the plurality of other gear members.

[0183] According to one embodiment of the present disclosure, the plurality of other gear members may include a third gear member and a fourth gear member. The third gear member may include a 13th cam portion formed toward the third cam member. The fourth gear member may include a 14th cam portion formed toward the third cam member. The third cam member may include a 15th cam portion corresponding to the 13th cam portion of the third gear member and a 16th cam portion corresponding to the 14th cam portion of the fourth gear member.

[0184] According to one embodiment of the present disclosure, the third gear member may be coupled with the third gear portion including the second through hole of the first arm and the fourth gear member. The fourth gear member may be coupled with the third gear member and the fourth gear portion including the fourth through hole of the second arm.

[0185] A foldable electronic device according to one embodiment of the present disclosure may include a first housing, a second housing, and a hinge assembly rotatably connecting the first housing and the second housing. The hinge assembly may include a first arm that rotates about a first rotation axis. The hinge assembly may include a second arm that rotates about a second rotation axis parallel to the first rotation axis. The hinge assembly may include a first cam member disposed between the first arm and the second arm in a direction perpendicular to the first arm and the second arm. The hinge assembly may include a second cam member disposed between the first arm and the second arm in a direction perpendicular to the first arm and the second arm. The hinge assembly may include a plurality of first elastic members disposed between the first cam member and the second cam member to apply elastic forces toward the first cam member and the second cam member. The hinge assembly may include a third cam member disposed adjacent to the second cam member. A portion of the first arm and a portion of the second arm may be disposed between the second cam member and the third cam member. The hinge assembly may include a fourth cam member disposed spaced apart from the third cam member. The hinge assembly may include a plurality of second elastic members disposed between the third cam member and the fourth cam member to apply elastic forces toward the third cam member and the fourth cam member. The sum of the elastic forces of the plurality of first elastic members may be greater than the sum of the elastic forces of the plurality of second elastic members.

[0186] According to one embodiment of the present disclosure, the plurality of first elastic members may include a first spring, a second spring, a third spring, and a fourth spring. The first spring may be fixed by a first shaft penetrating the first cam member and the second cam member. The second spring may be fixed by a second shaft penetrating the first cam member and the second cam member. The third spring and the fourth spring may be disposed between the first spring and the second spring. The plurality of second elastic members may include a fifth spring, a sixth spring, a seventh spring, and an eighth spring. The fifth spring may be fixed by the first shaft penetrating the third cam member and the fourth cam member. The sixth spring may be fixed by the second shaft penetrating the third cam member and the fourth cam member. The seventh spring and the eighth spring may be disposed between the fifth spring and the sixth spring.

[0187] The effects of the invention according to one embodiment of the present disclosure are as follows.

[0188] According to one embodiment of the present disclosure, a foldable electronic device can be provided that can achieve a free stop of the housing while improving durability by increasing the number of cam portions formed in the cam member and increasing the elastic force of the elastic members disposed between the cam members.

[0189] According to one embodiment of the present disclosure, the number of cam portions formed in the cam members is increased, thereby reducing wear on the cam portions while increasing the elastic force of the elastic members disposed between the cam members, so that a foldable electronic device with an enhanced free-stop function can be provided.

[0190] In addition, various effects identified directly or indirectly through the present disclosure may be provided.

[0191] Methods according to the claims or embodiments described in the specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0192] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. One or more programs include instructions that cause the electronic device to execute methods according to the claims or embodiments described in the specification of this disclosure.

[0193] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, ROM (read-only memory), electrically erasable programmable read-only memory (EEPROM), magnetic disc storage devices, compact disc-ROMs (CD-ROMs), digital versatile discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0194] Additionally, the above program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, LAN (local area network), WLAN (wide LAN), or SAN (storage area network), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present disclosure.

[0195] In the specific embodiments of the present disclosure described above, the components included in the disclosure are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present disclosure is not limited to singular or plural components; even if a component is expressed in the plural, it may be composed of a singular form, and even if a component is expressed in the singular form, it may be composed of a plural form.

[0196] Additionally, in the present disclosure, terms such as “part,” “module,” etc. may be a hardware component, such as a processor or circuit, and / or a software component executed by a hardware component, such as a processor.

[0197] "Parts" and "modules" may be implemented by a program that is stored on an addressable storage medium and can be executed by a processor. For example, "parts" and "modules" may be implemented by components such as software components, object-oriented software components, class components, and task components, as well as by processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables.

[0198] The specific embodiments described in this disclosure are merely examples and do not limit the scope of this disclosure in any way. For the sake of brevity, descriptions of prior electronic configurations, control systems, software, and other functional aspects of said systems may be omitted.

[0199] Additionally, in the present disclosure, “comprising at least one of a, b, or c” may mean “comprising only a, comprising only b, comprising only c, comprising a and b, comprising b and c, comprising a and c, or comprising all of a, b, and c.”

[0200] Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, it is understood that various modifications are possible within the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

Claims

1. In a foldable electronic device, First housing; Second housing; and It includes a hinge assembly that rotatably connects the first housing and the second housing, and The above hinge assembly is, A first arm comprising a first penetrating hole and a second penetrating hole corresponding to a first rotating axis; A first shaft penetrating the first through hole and the second through hole; A second arm comprising a third through hole and a fourth through hole corresponding to a second rotation axis parallel to the first rotation axis; A second shaft penetrating the third through hole and the fourth through hole; A first cam member disposed between the first arm and the second arm; A second cam member disposed between the first arm and the second arm; A plurality of first elastic members disposed between the first cam member and the second cam member, and connected to the first cam member and the second cam member through the first shaft and the second shaft; A third cam member connected to the second through hole and the fourth through hole through the first shaft and the second shaft; A fourth cam member spaced apart from the third cam member; and It includes a plurality of second elastic members disposed between the third cam member and the fourth cam member, and connected to the third cam member and the fourth cam member through the first shaft and the second shaft. A foldable electronic device in which the sum of the elastic forces of the plurality of first elastic members is greater than the sum of the elastic forces of the plurality of second elastic members.

2. In Paragraph 1, The first arm includes a first cam portion that surrounds the first through hole and protrudes toward the first cam member, and The second arm includes a second cam portion that surrounds the third through hole and protrudes toward the first cam member, and A foldable electronic device comprising a first cam member, a third cam portion corresponding to the first cam portion of the first arm, and a fourth cam portion corresponding to the second cam portion of the second arm.

3. In Paragraph 2, The above hinge assembly is, It further includes a plurality of gear members disposed between the first through hole of the first arm and the third through hole of the second arm, and A foldable electronic device wherein the first cam member comprises cam portions corresponding to the cam portions of the plurality of gear members.

4. In Paragraph 3, The above plurality of gear members include a first gear member and a second gear member, and The first gear member includes a fifth cam portion protruding toward the first cam member, and The second gear member includes a sixth cam portion protruding toward the first cam member, and A foldable electronic device, wherein the first cam member comprises a seventh cam portion corresponding to the fifth cam portion of the first gear member and an eighth cam portion corresponding to the sixth cam portion of the second gear member.

5. In Paragraph 4, The first gear member is engaged with the first gear portion including the first through hole of the first arm and the second gear member, and A foldable electronic device in which the second gear member is coupled with the second gear portion including the first gear member and the third through hole of the second arm.

6. In Paragraph 4, The first cam member includes a fifth through hole formed on one side of the first cam member corresponding to the first through hole of the first arm, and a sixth through hole formed on the other side opposite to the one side of the first cam member corresponding to the third through hole of the second arm. The first shaft passes through the first through hole of the first arm and the fifth through hole of the first cam member, and A foldable electronic device in which the second shaft penetrates the third through hole of the second arm and the sixth through hole of the first cam member.

7. In Paragraph 6, A foldable electronic device in which the third cam portion of the first cam member surrounds the fifth through hole, and the fourth cam portion of the first cam member surrounds the sixth through hole.

8. In Paragraph 7, The plurality of first elastic members include a first spring and a second spring, and The first spring is fixed by the first shaft penetrating the first cam member and the second cam member, and A foldable electronic device in which the second spring is fixed by the second shaft penetrating the first cam member and the second cam member.

9. In Paragraph 2, The first arm includes a ninth cam portion that surrounds the second through hole and protrudes toward the third cam member, The second arm includes a tenth cam portion that surrounds the fourth through hole and protrudes toward the third cam member, A foldable electronic device, wherein the third cam member comprises a 11th cam portion corresponding to the 9th cam portion of the first arm and a 12th cam portion corresponding to the 10th cam portion of the second arm.

10. In Paragraph 9, The plurality of second elastic members include a fifth spring and a sixth spring, and The fifth spring is fixed by the first shaft penetrating the third cam member and the fourth cam member, and A foldable electronic device in which the sixth spring is secured by the second shaft penetrating the third cam member and the fourth cam member.

11. In Paragraph 9, The first cam portion of the first arm includes a first convex portion that contacts the third cam portion of the first cam member, and The ninth cam portion of the first arm includes a second convex portion that contacts the eleventh cam portion of the third cam member, and A foldable electronic device in which the shape of the first convex portion of the first cam portion is different from the shape of the second convex portion of the ninth cam portion.

12. In Paragraph 2, The above hinge assembly is, It further includes a plurality of other gear members disposed between the second through hole of the first arm and the fourth through hole of the second arm, and A foldable electronic device wherein the third cam member comprises cam portions corresponding to the cam portions of the plurality of other gear members.

13. In Paragraph 12, The above plurality of other gear members include a third gear member and a fourth gear member, and The third gear member includes a 13th cam portion protruding toward the third cam member, and The above-mentioned fourth gear member includes a 14th cam portion protruding toward the above-mentioned third cam member, and A foldable electronic device, wherein the third cam member comprises a 15 cam portion corresponding to the 13 cam portion of the third gear member and a 16 cam portion corresponding to the 14 cam portion of the fourth gear member.

14. In Paragraph 13, The third gear member is engaged with the third gear portion including the second through hole of the first arm and the fourth gear member, A foldable electronic device in which the above-mentioned fourth gear member is coupled with a fourth gear portion including the above-mentioned third gear member and the above-mentioned second arm's fourth through hole.

15. In a foldable electronic device, First housing; Second housing; and It includes a hinge assembly that rotatably connects the first housing and the second housing, and The above hinge assembly is, A first arm that rotates about a first rotating axis; A second arm that rotates about a second rotation axis parallel to the first rotation axis; A first cam member disposed between the first arm and the second arm in a direction perpendicular to the first arm and the second arm; A second cam member disposed between the first arm and the second arm in a direction perpendicular to the first arm and the second arm; A plurality of first elastic members arranged to apply elastic forces toward the first cam member and the second cam member between the first cam member and the second cam member; A third cam member disposed adjacent to the second cam member, and a part of the first arm and a part of the second arm disposed between the second cam member and the third cam member; A fourth cam member spaced apart from the third cam member; and It includes a plurality of second elastic members arranged to apply elastic forces toward the third cam member and the fourth cam member between the third cam member and the fourth cam member, and A foldable electronic device in which the sum of the elastic forces of the plurality of first elastic members is greater than the sum of the elastic forces of the plurality of second elastic members.

Images