Foldable electronic devices include gears.

Abstract

The invention relates to a foldable electronic device comprising: a housing consisting of a first housing, a second housing, and a third housing; a first hinge assembly connecting the first and third housings in a rotatable manner, and comprising a first gear assembly for rotating the third housing in conjunction with the rotational movement of the first housing; and a second hinge assembly connecting the second and third housings in a rotatable manner, and comprising a second gear assembly for rotating the third housing in conjunction with the rotational movement of the second housing. The number of gears included in the second gear assembly is greater than the number of gears included in the first gear assembly.

Description

Foldable electronic devices containing gears

[0001] The present disclosure relates to a foldable electronic device including gears.

[0002] An electronic device may include a foldable electronic device including a flexible display to provide an enhanced user experience. For example, the foldable electronic device may include a plurality of housing parts. The foldable housing may have a structure in which the plurality of housing parts can be folded or unfolded one or more times. For example, the foldable housing may include three housing parts that are rotatably coupled to each other via two hinge assemblies. Depending on how the foldable housing is folded, the structure of each of the two hinge assemblies may be different.

[0003] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art in connection with the present disclosure.

[0004] A foldable electronic device is provided. The foldable electronic device may include a housing including a first housing part, a second housing part, and a third housing part. The foldable electronic device may include a first hinge assembly including a first gear set for rotatably connecting the first housing part and the third housing part and for rotating the third housing part together with the rotation of the first housing part. The foldable electronic device may include a second hinge assembly including a second gear set for rotatably connecting the second housing part and the third housing part and for rotating the third housing part together with the rotation of the second housing part. The number of gears included in the second gear set may be greater than the number of gears included in the first gear set so as to provide a folded state of the foldable electronic device in which a front side of the first housing part faces a front side of the third housing part and a rear side of the first housing part faces a front side of the second housing part.

[0005] FIG. 1 is a block diagram of an electronic device within a network environment according to one embodiment.

[0006] FIG. 2 illustrates a foldable electronic device according to one embodiment.

[0007] FIG. 3A illustrates a housing and hinge assemblies of a foldable electronic device according to one embodiment.

[0008] FIG. 3b illustrates states of a foldable electronic device according to one embodiment.

[0009] Figure 4a is an exploded view of the second hinge assembly.

[0010] Figure 4b illustrates a portion of the second hinge assembly.

[0011] Figure 5a illustrates a first rotation member of the second hinge assembly.

[0012] Figure 5b illustrates a guide member of the second hinge assembly.

[0013] Fig. 5c illustrates a state in which the first rotating member illustrated in Fig. 5a and the guide member illustrated in Fig. 5b are combined.

[0014] Fig. 6a is a cross-sectional view of the second hinge assembly taken along line A-A' of Fig. 5c.

[0015] Figure 6b illustrates the operation of the first rotating member when the first and second arms are not coupled.

[0016] Figure 6c illustrates the operation of the first rotating member when the first and second arms are linked.

[0017] Figure 7a illustrates a first gear set of the first hinge assembly.

[0018] Figure 7b illustrates a second gear set of the second hinge assembly.

[0019] Figure 7c schematically illustrates the first hinge assembly and the second hinge assembly.

[0020] Figure 8a illustrates the shafts of the first hinge assembly and the shafts of the second hinge assembly.

[0021] Figure 8b illustrates a second rotation member of the second hinge assembly.

[0022] Figure 9a illustrates the coupling relationship of the first rotation member, the connecting member, and the second rotation member of the second hinge assembly.

[0023] Figure 9b is a perspective view of a portion of the second hinge assembly.

[0024] FIG. 9c illustrates a portion of the second hinge assembly, within the first state or the second state.

[0025] FIG. 9d illustrates a portion of the second hinge assembly within the third state.

[0026] Figure 10a illustrates the operation process of the second hinge assembly.

[0027] FIG. 10b illustrates a cross-section between the foldable housing and the second hinge assembly.

[0028] Figure 11a illustrates the operation process of the second hinge assembly.

[0029] Fig. 11b is a cross-sectional view of a connection portion between a first rotation member and a guide member in the first state or the second state.

[0030] Figure 11c illustrates a portion of the second hinge assembly.

[0031] FIG. 12a illustrates a portion of a first hinge assembly and a portion of a second hinge assembly.

[0032] Figure 12b is a cross-sectional view of the second hinge assembly taken along line C-C' of Figure 12a.

[0033] Figure 12c illustrates the slots and protrusions of the second hinge assembly.

[0034] Figure 12d illustrates states of the second hinge assembly according to the rotation angle of the second hinge assembly.

[0035] Figure 12e illustrates a third elastic member positioned within the slot.

[0036] Figure 13 illustrates a portion of the second hinge assembly.

[0037] Figure 14a is an exploded perspective view of the second hinge assembly and the exemplary second support plate.

[0038] Figure 14b illustrates a state in which the second support plate is coupled to the second hinge cover.

[0039] FIG. 14c illustrates a flexible display according to a state of a foldable electronic device according to one embodiment.

[0040] Figure 15a schematically illustrates a deformation process of a flexible display according to the operation of the second hinge assembly.

[0041] Figure 15b illustrates a second hinge assembly and a second support plate.

[0042] Figure 15c illustrates a first hinge assembly and a second hinge assembly.

[0043] FIG. 16A is a drawing for comparing a foldable electronic device including a second support plate and a foldable electronic device not including a second support plate.

[0044] FIGS. 16b and 16c illustrate a portion of a foldable electronic device including a second support plate.

[0045] FIG. 17 illustrates a process of transforming a foldable electronic device from an unfolded state to a folded state according to one embodiment.

[0046] FIG. 18 is a cross-sectional view of a foldable electronic device according to one embodiment.

[0047] FIG. 19 illustrates a flexible display, a first hinge assembly, and a second hinge assembly in a folded state.

[0048] FIG. 20A is a perspective view of a foldable electronic device according to one embodiment.

[0049] FIG. 20b illustrates a foldable electronic device according to a comparative example.

[0050] FIG. 21 illustrates a foldable electronic device according to one embodiment in a folded state.

[0051] FIG. 1 is a block diagram of an electronic device within a network environment, according to one embodiment.

[0052] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) via a first network (198) (e.g., a short-range wireless communication network), or may communicate with an electronic device (104) or a server (108) via a second network (199) (e.g., a long-range wireless communication network). In one embodiment, the electronic device (101) may communicate with the electronic device (104) via the server (108). According to one embodiment, the electronic device (101) may include a processor (120), a memory (130), an input module (150), an audio output module (155), a display module (160), an audio module (170), a sensor module (176), an interface (177), a connection terminal (178), a haptic module (179), a camera module (180), a power management module (188), a battery (189), a communication module (190), a subscriber identification module (196), or an antenna module (197). In some embodiments, the electronic device (101) may omit at least one of these components (e.g., the connection terminal (178)), or may have one or more other components added. In some embodiments, some of these components (e.g., the sensor module (176), the camera module (180), or the antenna module (197)) may be integrated into one component (e.g., the display module (160)).

[0053] The processor (120) may, for example, execute software (e.g., a program (140)) to control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) and perform various data processing or operations. According to one embodiment, as at least a part of the data processing or operations, the processor (120) may store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in a volatile memory (132), process the commands or data stored in the volatile memory (132), and store result data in a non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor) that can operate independently or together with the main processor (121). For example, when the electronic device (101) includes the main processor (121) and the auxiliary processor (123), the auxiliary processor (123) may be configured to use less power than the main processor (121) or to be specialized for a given function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as a part thereof.

[0054] The auxiliary processor (123) may control at least a portion of functions or states associated with at least one component (e.g., a display module (160), a sensor module (176), or a communication module (190)) of the electronic device (101), for example, on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. In one embodiment, the auxiliary processor (123) (e.g., an image signal processor or a communication processor) may be implemented as a part of another functionally related component (e.g., a camera module (180) or a communication module (190)). In one embodiment, the auxiliary processor (123) (e.g., a neural network processing unit) may include a hardware structure specialized for processing artificial intelligence models. The artificial intelligence models may be generated through machine learning. This learning can be performed, for example, in the electronic device (101) itself where artificial intelligence is performed, or can be performed through a separate server (e.g., server (108)). The learning algorithm can include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model can include multiple artificial neural network layers.The artificial neural network may be one of a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to, or alternatively to, a hardware structure, an artificial intelligence model may include a software structure.

[0055] The memory (130) can store various data used by at least one component (e.g., processor (120) or sensor module (176)) of the electronic device (101). The data can include, for example, software (e.g., program (140)) and input data or output data for commands related thereto. The memory (130) can include volatile memory (132) or non-volatile memory (134).

[0056] The program (140) may be stored as software in the memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0057] The input module (150) can receive commands or data to be used in a component of the electronic device (101) (e.g., a processor (120)) from an external source (e.g., a user) of the electronic device (101). The input module (150) can include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0058] The audio output module (155) can output audio signals to the outside of the electronic device (101). The audio output module (155) can include, for example, a speaker or a receiver. The speaker can be used for general purposes, such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. In one embodiment, the receiver can be implemented separately from the speaker or as part of the speaker.

[0059] The display module (160) can visually provide information to an external party (e.g., a user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling the device. In one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of a force generated by the touch.

[0060] The audio module (170) can convert sound into an electrical signal, or vice versa, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150), output sound through the sound output module (155), or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphone) directly or wirelessly connected to the electronic device (101).

[0061] The sensor module (176) can detect the operating status (e.g., power or temperature) of the electronic device (101) or the external environmental status (e.g., user status) and generate an electrical signal or data value corresponding to the detected status. According to one embodiment, the sensor module (176) can include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0062] The interface (177) may support one or more designated protocols that may be used to directly or wirelessly connect the electronic device (101) to an external electronic device (e.g., the electronic device (102)). In one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0063] The connection terminal (178) may include a connector through which the electronic device (101) may be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0064] The haptic module (179) can convert electrical signals into mechanical stimuli (e.g., vibration or movement) or electrical stimuli that a user can perceive through tactile or kinesthetic sensations. According to one embodiment, the haptic module (179) can include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

[0065] The camera module (180) can capture still images and videos. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0066] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented as, for example, at least a part of a power management integrated circuit (PMIC).

[0067] A battery (189) may power at least one component of the electronic device (101). In one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0068] The communication module (190) may support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may operate independently from the processor (120) (e.g., application processor) and may include one or more communication processors that support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (194) (e.g., a local area network (LAN) communication module, or a power line communication module). Among these communication modules, the corresponding communication module can communicate with an external electronic device (104) via a first network (198) (e.g., a short-range communication network such as Bluetooth, wireless fidelity (WiFi) direct, or infrared data association (IrDA)) or a second network (199) (e.g., a long-range communication network such as a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules can be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can verify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) by using subscriber information (e.g., an international mobile subscriber identity (IMSI)) stored in the subscriber identification module (196).

[0069] The wireless communication module (192) can support 5G networks and next-generation communication technologies following the 4G network, such as NR access technology (new radio access technology). The NR access technology can support high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and connection of multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency communications)). The wireless communication module (192) can support, for example, a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate. The wireless communication module (192) can support various technologies for securing performance in a high-frequency band, such as beamforming, massive multiple-input and multiple-output (MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), an external electronic device (e.g., the electronic device (104)), or a network system (e.g., the second network (199)). According to one embodiment, the wireless communication module (192) can support a peak data rate (e.g., 20 Gbps or more) for eMBB realization, a loss coverage (e.g., 164 dB or less) for mMTC realization, or a U-plane latency (e.g., 0.5 ms or less for downlink (DL) and uplink (UL), or 1 ms or less for round trip) for URLLC realization.

[0070] The antenna module (197) can transmit or receive signals or power to or from an external device (e.g., an external electronic device). In one embodiment, the antenna module (197) may include an antenna including a radiator formed of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). In one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as the first network (198) or the second network (199), may be selected from the plurality of antennas by, for example, the communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. In some embodiments, in addition to the radiator, another component (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as a part of the antenna module (197).

[0071] In one embodiment, the antenna module (197) may form a mmWave antenna module. In one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent a first side (e.g., a bottom side) of the printed circuit board and capable of supporting a designated high frequency band (e.g., a mmWave band), and a plurality of antennas (e.g., an array antenna) disposed on or adjacent a second side (e.g., a top side or a side side) of the printed circuit board and capable of transmitting or receiving signals in the designated high frequency band.

[0072] At least some of the above components can be interconnected and exchange signals (e.g., commands or data) with each other via a communication method between peripheral devices (e.g., a bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)).

[0073] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) via a server (108) connected to a second network (199). Each of the external electronic devices (102 or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations executed in the electronic device (101) may be executed in one or more of the external electronic devices (102, 104, or 108). For example, when the electronic device (101) is to perform a certain function or service automatically or in response to a request from a user or another device, the electronic device (101) may, instead of or in addition to executing the function or service itself, request one or more external electronic devices to perform the function or at least part of the service. One or more external electronic devices that receive the request may execute at least a portion of the requested function or service, or an additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may process the result as is or additionally and provide it as at least a portion of a response to the request. For this purpose, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device (101) may provide an ultra-low latency service by using distributed computing or mobile edge computing, for example. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server utilizing machine learning and / or a neural network. According to one embodiment, the external electronic device (104) or the server (108) may be included in the second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0074] Within the present disclosure, relative terms such as "above," "below," "one side," "the other side," "one end," and "the other end" may be used to describe the relative positional relationship between components, rather than to indicate the absolute positions of the components. For example, if the electronic device (101) depicted in the drawing is flipped over, the terms "above" and "below" may be interchanged. For example, if the electronic device (101) depicted in the drawing is flipped over, the terms "one end" and "the other end" may be interchanged.

[0075] FIG. 2 illustrates a foldable electronic device according to one embodiment.

[0076] Referring to FIG. 2, the electronic device (e.g., the electronic device (101) of FIG. 1) may include a foldable electronic device (101). According to an embodiment, the foldable electronic device (101) may include a deformable housing (e.g., a foldable housing (200)). The housing may include a foldable housing (200) configured to be folded or unfolded. For example, the foldable housing (200) may be referred to as a multi-foldable housing in that it includes three housing parts that are rotatably connected. For example, the foldable housing (200) may include a first housing part (210), a second housing part (220), and a third housing part (230) that are rotatably coupled to each other. Within the present disclosure, the foldable housing (200) is described as having a structure including a first housing part (210), a second housing part (220), and a third housing part (230), but is not limited thereto. For example, the foldable housing (200) may include a plurality of housing parts, four or more.

[0077] For example, the electronic device (101) may include a hinge assembly (250) (e.g., a first hinge assembly (251) and a second hinge assembly (252)) for a deformable structure of the foldable housing (200). For example, the hinge assembly (250) may rotatably connect the first housing part (210), the second housing part (220), and the third housing part (230) to each other. For example, depending on the folding structure of the foldable housing (200), the connection relationship between the hinge assembly (250) and the housing parts may be different.

[0078] Referring to FIG. 2, the first housing part (210) may be rotatably coupled to one side (e.g., the +x direction side) of the third housing part (230) about a first folding axis (241). For example, the second housing part (220) may be rotatably coupled to the other side (e.g., the -x direction side) of the third housing part (230) about a second folding axis (242). For example, the hinge assembly (250) may include a first hinge assembly (251) rotatably connecting the first housing part (210) to one side of the third housing part (230) and a second hinge assembly (252) rotatably connecting the second housing part (220) to the other side of the third housing part (230). The electronic device (101) may have a structure that can be folded more than once by the first hinge assembly (251) and the second hinge assembly (252).

[0079] According to one embodiment, the second folding axis (242) may be parallel to the first folding axis (241). For example, the first folding axis (241) and the second folding axis (242) may be parallel to the y-axis. For example, the first folding axis (241) may be a rotational axis that serves as a center of rotation of the first housing part (210) and the third housing part (230) connected by the first hinge assembly (251). For example, the second folding axis (242) may be a rotational axis that serves as a center of rotation of the second housing part (220) and the third housing part (230) connected by the second hinge assembly (252).

[0080] For example, as the first housing part (210) and / or the third housing part (230) rotates about the first folding axis (241), the first angle (261) between the first housing part (230) and the third housing part (230) may change. For example, as the second housing part (220) and / or the third housing part (230) rotates about the second folding axis (242), the second angle (262) between the second housing part (220) and the third housing part (230) may change. In terms of including a plurality of folding axes, such as the first folding axis (241) and the second folding axis (242), the foldable electronic device (101) according to one embodiment may be referred to as a multi-foldable electronic device.

[0081] A foldable electronic device (101) according to one embodiment may include a flexible display (271) disposed on a foldable housing (200). For example, the flexible display (271) may extend from at least a portion of the front surface of the first housing part (210) across at least a portion of the front surface of the third housing part (230) to at least a portion of the front surface of the second housing part (220). For example, when the foldable housing (200) is folded or unfolded, at least a portion of the flexible display (271) may be folded or unfolded.

[0082] Referring to FIG. 2, different states of the electronic device (101) distinguished by the shape of the foldable housing (200) are illustrated. For example, the flexible display (271) of the electronic device (101) illustrated in FIG. 2 may be covered by the first housing part (210), the second housing part (220), and the third housing part (230) folded along the first folding axis (241) and the second folding axis (242). The states described in the present disclosure may represent states of the foldable electronic device (101) or states of the foldable housing (200).

[0083] The first state (201) of FIG. 2 may represent a fully unfolded state of the first housing part (210), the second housing part (220), and the third housing part (230). For example, within the first state (201), the first angle (261) and the second angle (262) may be substantially straight angles (e.g., approximately 180 degrees). The first state (201) may be referred to as an open state, a flat state, an outspread state, and / or an unfolded state from the perspective that the first housing part (210), the second housing part (220), and the third housing part (230) are fully unfolded. Within the first state (201), the flexible display (271) may be substantially flat. For example, within the first state (201), the third housing part (230) may be positioned between the first housing part (210) and the second housing part (220).

[0084] The second state (202) of FIG. 2 may represent a state in which at least one of the first angle (261) or the second angle (262) is less than a parallel angle. For example, as the first housing part (210) is rotated relative to the third housing part (230) or as the second housing part (220) is rotated relative to the third housing part (230), the electronic device (101) may change from the first state (201) to the second state (202). For example, a state of the electronic device (101) in which the first angle (261) and / or the second angle (262) is less than a parallel angle may be referred to as an in-fold state, a sub-unfolded state (or sub-folded state), an intermediate state, and / or a concave state. Within the second state (202), a portion of the flexible display (271) may be folded. For example, a portion of the flexible display (271) corresponding to the first folding axis (241) and / or the second folding axis (242) may be folded at an angle corresponding to the first angle (261) and / or the second angle (262).

[0085] The third state (203) of FIG. 2 may represent a fully folded state in which the first housing part (210), the second housing part (220), and the third housing part (230) are completely folded. For example, within the third state (203), the first angle (261) and the second angle (262) may be substantially 0 degrees. For example, within the third state (203), the flexible display (271) may not be exposed to the outside of the electronic device (101) by being covered by the first housing part (210), the second housing part (220), and the third housing part (230). For example, within the third state (203), the cover display (272) disposed on the second housing part (220) may be exposed to the outside.

[0086] FIG. 3A illustrates a housing and hinge assemblies of a foldable electronic device according to one embodiment. FIG. 3B illustrates states of a foldable electronic device according to one embodiment.

[0087] According to one embodiment, the foldable housing (200) may include a first housing part (210), a second housing part (220), and a third housing part (230). For example, the first housing part (210) may include a first support member (211). For example, the second housing part (220) may include a second support member (221). For example, the third housing part (230) may include a third support member (231). The first support member (211), the second support member (221), and the third support member (231) may support a flexible display (e.g., the flexible display (271) of FIG. 2) and electronic components disposed inside the foldable housing (200).

[0088] According to one embodiment, the foldable electronic device (101) may include a first hinge assembly (251) and a second hinge assembly (252) that provide deformation of the foldable housing (200). For example, the first hinge assembly (251) may be disposed between the first housing part (210) and the third housing part (230). For example, the first hinge assembly (251) may rotatably connect the first housing part (210) and the third housing part (230) about a first folding axis (241). For example, when a user applies an external force to fold the first housing part (210), the first housing part (210) may be rotated with respect to the third housing part (230) through the first hinge assembly (251). For example, the first housing part (210) can be folded inwardly relative to the third housing part (230). From the perspective that the first housing part (210) is folded inwardly relative to the third housing part (230), the first housing part (210), the first hinge assembly (251), and the third housing part (230) can be referred to as an in-fold structure.

[0089] According to one embodiment, the second hinge assembly (252) may be disposed between the second housing part (220) and the third housing part (230). For example, the second hinge assembly (252) may rotatably connect the second housing part (220) and the third housing part (230) about the second folding axis (242). For example, when a user applies an external force to fold the second housing part (220), the second housing part (220) may be rotated relative to the third housing part (230) via the second hinge assembly (252). For example, the second housing part (220) may be folded inward relative to the third housing part (230). From the perspective that the second housing part (220) is folded inwardly relative to the third housing part (230), the third housing part (230), the second hinge assembly (252), and the second housing part (220) may be referred to as an in-fold structure. For example, the foldable electronic device (101) may include joining members (e.g., magnets) (280) for maintaining the folded state of the foldable electronic device (101). For example, when the foldable housing (200) is folded, the foldable electronic device (101) may be configured to maintain the folded state based on the attractive force between the magnets.

[0090] According to one embodiment, the first hinge assembly (251) may include a first rotation plate (251-1) coupled to the first housing part (210) and a second rotation plate (251-2) coupled to the third housing part (230). The first rotation plate (251-1) and the second rotation plate (251-2) may be rotated relative to each other via a first gear set (320). The second hinge assembly (252) may include a third rotation plate (252-1) coupled to the second housing part (220) and a fourth rotation plate (252-2) coupled to the third housing part (230). The third rotation plate (252-1) and the fourth rotation plate (252-2) may be rotated relative to each other via a second gear set (330).

[0091] In one embodiment, the second hinge assembly (252) may be different from the first hinge assembly (251). For example, depending on how the foldable housing (200) is folded, a structural difference between the first hinge assembly (251) and the second hinge assembly (252) may be required. As described above, since the first housing part (210) and the second housing part (220) are each folded inward with respect to the third housing part (230), the structure of the second hinge assembly (252) may be different from the structure of the first hinge assembly (251).

[0092] Referring to FIG. 3b, the foldable housing (200) can be configured to provide a first state (e.g., state (300a)), a second state (e.g., state (300b)), and a third state (e.g., state (300c)).

[0093] For example, the state (300a) of FIG. 3b may be referred to as a first state in which the first housing part (210), the second housing part (220), and the third housing part (230) are disposed substantially on the same plane. For example, the state (300b) of FIG. 3b may be referred to as a second state in which the first housing part (210) is folded inward with respect to the third housing part (230) via the first hinge assembly (251). The second state of FIG. 3b may be referred to as a state in which, among the first housing part (210) and the second housing part (220), only the first housing part (210) is folded. For example, state (300c) of FIG. 3b may be referred to as a third state in which the second housing part (220) is folded inwardly relative to the third housing part (230) via the second hinge assembly (252) within the second state, such that the second housing part (200) is positioned over the first housing part (210). The first state may be referred to as an opened state, a flat state, an outspread state, and / or an unfolded state. The second state may be referred to as an in-fold state, a sub-expanded state (or sub-folded state), and / or a semi-expanded state (or semi-folded state). The third state may be referred to as a closed state, a fully folded state, a folded state, and / or a closed state.

[0094] According to one embodiment, within a third state (e.g., a folded state), a front side (210a) of the first housing part (210) may face a front side (230a) of the third housing part (230). Within the third state, a rear side (210b) of the first housing part (210) may face a front side (220a) of the second housing part (220). The folded state of the foldable electronic device (101) may be referred to as a state in which the front side (210a) of the first housing part (210) faces a front side (230a) of the third housing part (230) and the rear side (210b) of the first housing part (210) faces a front side (220a) of the second housing part (220).

[0095] The foldable electronic device (101) can be used in a first state to provide a large-screen flexible display (e.g., the flexible display (271) of FIG. 2). The foldable electronic device (101) can be transitioned from the first state to a third state so that it can be easily carried by a user. For example, the foldable electronic device (101) can be transitioned from the first state to the second state and then to the third state. For example, in the first state, the first housing part (210) can first be folded inwardly relative to the third housing part (230) (second state), and then the second housing part (220) can be folded inwardly relative to the third housing part (230) (third state). For example, in the third state, when the foldable electronic device (101) is viewed from the side, the first housing part (210) may be positioned between the third housing part (230) and the second housing part (220).

[0096] For example, in order to provide the third state (e.g., folded state), the second hinge assembly (252) may be different from the first hinge assembly (251). If the size of the second hinge assembly (252) is substantially the same as or similar to the size of the first hinge assembly (251), when the second housing part (220) and the third housing part (230) are folded, a space for the first housing part (210) to be positioned may not be formed between the second housing part (220) and the third housing part (230). For example, in order to provide a space for the first housing part (210) to be positioned between the third housing part (230) and the second housing part (220) within the third state, the size of the second hinge assembly (252) may be larger than the size of the first hinge assembly (251). For example, the width of the second hinge assembly (252) may be wider than the width of the first hinge assembly (251). In view of having a relatively narrow width, the first hinge assembly (251) may be referred to as a narrow hinge, and in view of having a relatively wide width, the second hinge assembly (252) may be referred to as a wide hinge.

[0097] A foldable electronic device (101) according to one embodiment may include a first hinge cover (311) and a second hinge cover (312). For example, the first hinge cover (311) may at least partially accommodate the first hinge assembly (251). For example, the second hinge cover (312) may at least partially accommodate the second hinge assembly (252). For example, since the size of the second hinge assembly (252) is larger than the size of the first hinge assembly (251), the second hinge cover (312) may be larger than the size of the second hinge cover (312). For example, the width of the second hinge cover (312) (e.g., the width (W4) of FIG. 17) may be wider than the width of the first hinge cover (311) (e.g., the width (W5) of FIG. 17). Depending on the difference in the size of the first hinge cover (311) and the size of the second hinge cover (312), whether the first hinge cover (311) and the second hinge cover (312) are exposed to the outside of the foldable electronic device (101) in the first state may differ. For example, referring to FIG. 3B, the first hinge cover (311) may be substantially covered by the first housing part (210) and the third housing part (230) in the first state. For example, the first hinge cover (311) having a relatively small size may not be substantially visible in the first state. For example, at least a portion of the second hinge cover (312) may be exposed between the second housing part (220) and the third housing part (230) in the first state. For example, a second hinge cover (312) having a relatively large size can be recognized within the first state.

[0098] According to one embodiment, the first hinge assembly (251) and the second hinge assembly (252) may each include a plurality of gears for deformation of the foldable housing (200). For example, the first hinge assembly (251) may include a first gear set (320). When an external force that causes rotation of the first housing part (210) is applied to the first housing part (210), the gears included in the first gear set (320) may rotate due to the external force. The first gear set (320) may rotate the third housing part (230) together with the rotation of the first housing part (210). The structure of the first gear set (320) will be described below with reference to FIG. 7A.

[0099] For example, the second hinge assembly (252) may include a second gear set (330). When an external force that causes the second housing part (220) to rotate is applied to the second housing part (220), the gears included in the second gear set (330) may rotate due to the external force. The second gear set (330) may rotate the third housing part (230) together with the rotation of the second housing part (220). The structure of the second gear set (330) will be described below with reference to FIG. 7B.

[0100] According to one embodiment, the second hinge assembly (252) has a larger size than the first hinge assembly (251) and, because it must form a space for the first housing part (210) in the third state (e.g., folded state), the second hinge assembly (252) may include more gears than the first hinge assembly (251). For example, the number of gears included in the second gear set (330) may be greater than the number of gears included in the first gear set (320). Since the second gear set (330) includes more gears than the first gear set (320), it may have a different arrangement structure from the arrangement structure of the first gear set (320) for stable driving.

[0101] Fig. 4a is an exploded view of the second hinge assembly. Fig. 4b illustrates a portion of the second hinge assembly.

[0102] According to one embodiment, the second hinge assembly (252) may be disposed between the third support member (231) of the third housing part (230) and the second support member (221) of the second housing part (220). For example, the second hinge cover (e.g., the second hinge cover (312) of FIG. 3B) may at least partially cover the components of the second hinge assembly (252). For example, some of the components of the second hinge assembly (252) (e.g., the first guide member (421), the second guide member (422)) may be fixed to the second hinge cover (312) by being coupled to the second hinge cover (312). The second hinge cover (312) can reduce the inflow of foreign substances into the second hinge assembly (252) and protect the components by covering the components of the second hinge assembly (252).

[0103] According to one embodiment, the second hinge assembly (252) may include rotating plates that are rotatable by an external force from a user. For example, the second hinge assembly (252) may include a third rotating plate (252-1) coupled to the second housing part (220) and a fourth rotating plate (252-2) coupled to the third housing part (230). Each of the third rotating plate (252-1) and the fourth rotating plate (252-2) may include a first rotating member (410), a guide member (420), a connecting member (430), a second rotating member (440), and a second gear set (330). For example, the first arm (411), the first guide member (421), and the first arm support (441) may be included within the third rotating plate (252-1). For example, the second arm (412), the second guide member (422), and the second arm support (442) may be included within the fourth rotation plate (252-2).

[0104] According to one embodiment, the first rotation member (410) may include a first arm (411) and a second arm (412). For example, the first arm (411) and the second arm (412) may be coupled to the second support member (221) and the third support member (231), respectively, thereby causing rotation of the second housing part (220) and the third housing part (230). The first arm (411) may be coupled to the second support member (221). The second arm (442) may be coupled to the third support member (231).

[0105] According to one embodiment, the guide member (420) can guide the rotational movement of the first rotation member (410). For example, the guide member (420) can include a first guide member (421) and a second guide member (422). For example, the first guide member (421) can be coupled with the first arm (411) and the first arm support (441). For example, the second guide member (422) can be coupled with the second arm (412) and the second arm support (442).

[0106] According to one embodiment, the connecting member (430) can link the first rotating member (410) and the second rotating member (440) and limit the rotation range. Through the connecting member (430), the first rotating member (410) and the second rotating member (440) can move together. For example, the connecting member (430) can be arranged between the first arm (411) and the second arm (412). For example, the connecting member (430) can include the first connecting member (431) and the second connecting member (432). The first connecting member (431) and the second connecting member (432) can face each other.

[0107] In one embodiment, the second rotating member (440) may be configured to transmit force to the first rotating member (410) through the connecting member (430) by interlocking with the operation of the second gear set (330). For example, the second rotating member (440) may include a first arm support (441) and a second arm support (442).

[0108] According to one embodiment, the second gear set (330) can link the rotational motion of the second housing part (220) with the rotational motion of the third housing part (230). The second gear set (330) can convert an external force applied to the foldable housing (200) into a rotational motion of the second housing part (220) and the third housing part (230). By the second gear set (330), the third housing part (230) can be rotated together with the second housing part (220).

[0109] For example, the second hinge assembly (252) may further include a friction body (450), a cover (460), a holder (470), at least two second elastic members (480), and a screw (S).

[0110] For example, the friction body (450) can cause a restoring force of at least two second elastic members (480) by pressing the at least two second elastic members (480). For example, the friction body (450) can enable a free stop or flex mode by providing a force (e.g., torque) that resists the rotation of the second rotation member (440) based on the restoring force. For example, the friction body (450) can include a first friction body (451) and a second friction body (452).

[0111] For example, the cover (460) may come into contact with the friction body (450). For example, the cover (460) may include a first cover (461) and a second cover (462).

[0112] For example, the holder (470) can fix at least two second elastic members (480) and, together with the friction body (450), cause a restoring force of the at least two second elastic members (480).

[0113] For example, the screw (S) may be used to secure some components of the second hinge assembly (252), such as the first rotating member (410), the connecting member (430), and / or the holder (470). For example, the screw (S) may be used to secure the second support plate (1420) to the second hinge cover (312).

[0114] For example, the foldable electronic device (101) may include a second support plate (1420). For example, the second support plate (1420) may reduce the curvature at which the flexible display (271) is folded by supporting a portion (e.g., the second bending portion (1440) of FIG. 14B) of the flexible display (e.g., the flexible display (271) of FIG. 2). For example, the second support plate (1420) may be disposed on a flexible printed circuit board (490) (e.g., in the +z direction).

[0115] Referring to FIG. 4b, the second hinge assembly (252) may be configured to rotate about two axes of rotation. For example, the second hinge assembly (252) may have one degree of freedom through the components illustrated in FIG. 4a.

[0116] For example, the two rotation axes may include a first rotation axis (401) and a second rotation axis (402). For example, the first rotation member (410) may be rotatable about the first rotation axis (401). For example, the first arm (411) and the second arm (412) may be rotated about 90 degrees about the first rotation axis (401). Since the first rotation member (410) may rotate about the first rotation axis (401), it may have one degree of freedom.

[0117] For example, the second rotation member (440) may be rotatable about the second rotation axis (402). For example, the first arm support (441) and the second arm support (442) may be rotated about 90 degrees about the second rotation axis (402). For example, the second rotation member (440) may include a protrusion (e.g., protrusion (910) of FIG. 9A) that is inserted into a slot (e.g., slot (920) of FIG. 9A) of the connecting member (430). For example, the second rotation member (440) may be capable of linear motion along the slot (920). Since the second rotation member (440) may be capable of rotation about the second rotation axis (402) and linear motion along the slot (920), it may have two degrees of freedom. According to mathematical equation 1, which is the Gruebler-Kutzbach's equation, the second hinge assembly can move with one degree of freedom.

[0118]

[0119] When calculating the degrees of freedom for the exemplary second hinge assembly (252) (see: 3(3-1)-2x2-1=1), 1 degree of freedom can be calculated.

[0120] Below, the structure and function of the components of the second hinge assembly (252) are described with reference to the drawings.

[0121] Fig. 5a illustrates a first rotation member of a second hinge assembly. Fig. 5b illustrates a guide member of the second hinge assembly. Fig. 5c illustrates a state in which the first rotation member illustrated in Fig. 5a and the guide member illustrated in Fig. 5b are coupled.

[0122] Referring to FIG. 5A, the first rotation member (410) may include a first arm (411) and a second arm (412). For example, the structure of the first arm (411) and the structure of the second arm (412) may be symmetrical with respect to the second folding axis (e.g., the second folding axis (242) of FIG. 3A). For example, the first arm (411) and the second arm (412) may be arranged symmetrically with respect to each other with the second folding axis (242) interposed therebetween.

[0123] For example, the first rotating member (410) may be fixed to the second housing part (e.g., the second housing part (220) of FIG. 3A) and the third housing part (e.g., the third housing part (230) of FIG. 3A) and may rotate together with the second gear set (e.g., the second gear set (330) of FIG. 3A). For example, the first rotating member (410) may be configured to transmit the motion of the second hinge assembly (e.g., the second hinge assembly (252) of FIG. 3A) to the second housing part (220) and / or the third housing part (230).

[0124] For example, the first rotating member (410) can be coupled to a foldable housing (e.g., the foldable housing (200) of FIG. 3a). For example, the first arm (411) can be coupled to a second housing part (220). For example, the second arm (412) can be coupled to a third housing part (230). For example, the first arm (411) and the second arm (412) can include at least one through hole (501, 502) into which a screw (e.g., the screw (S) of FIG. 4a) is inserted. For example, the screw (S) passes through at least one first through hole (501) of the first arm (411) and is inserted into a second support member (e.g., the second support member (221) of FIG. 3a), whereby the first arm (411) can be coupled to the second housing part (220). For example, the second arm (412) may be coupled to the third housing part (230) by having the screw (S) pass through at least one second through hole (502) of the second arm (412) and be inserted into the third support member (e.g., the third support member (231) of FIG. 3a).

[0125] For example, the first arm (411) may include a first portion (511) and a second portion (512). For example, the first portion (511) may be a portion of the first arm (411) that is coupled to the second support member (221). For example, at least one first through hole (501) may be formed in the first portion (511). For example, the second portion (512) may protrude from the first portion (511) toward the second folding axis (242). For example, the size of the second portion (512) may be smaller than the size of the first portion (511). For example, the first portion (511) may include a first recessed portion (511a) in which a portion of a connecting member (e.g., connecting member (430) of FIG. 4A) is placed. For example, by bonding the connecting member (430) to the first recessed portion (511a), the upper surface of the connecting member (430) (e.g., the surface facing the +z direction) and the upper surface of the first arm (411) can form substantially the same plane.

[0126] For example, the second arm (412) may include a third portion (513) and a fourth portion (514). For example, the third portion (513) may be a portion of the second arm (412) that is coupled to the third support member (231). For example, at least one second through hole (502) may be formed in the third portion (513). For example, the fourth portion (514) may protrude from the third portion (513) toward the second folding axis (242). For example, the size of the fourth portion (514) may be smaller than the size of the third portion (513). For example, the third portion (513) may include a second recessed portion (513a) in which a portion of the connecting member (430) is placed. For example, by combining the connecting member (430) on the second recessed portion (513a), the upper surface of the connecting member (430) and the upper surface of the second arm (412) can form substantially the same plane.

[0127] For example, the first rotary member (410) may include a rotary rail (530). For example, the rotary rail (530) may be inserted into a guide groove (e.g., a guide groove (540) of FIG. 5B) of a guide member (e.g., a guide member (420) of FIG. 5B) and may move along the guide groove (540) based on an external force applied to the foldable housing (200). For example, the rotary rail (530) may have a curved protrusion shape with a certain curvature, but is not limited thereto. The rotary rail (530) may enable the rotational movement of the first rotary member (410) by moving along the guide groove (540).

[0128] For example, the first arm (411) may include a first rotary rail (531). For example, the first rotary rail (531) may be formed on both sides of the second portion (512). For example, the first rotary rail (531) may include a first rail (531a) and a second rail (531b). For example, the first rail (531a) may be formed on one side of the second portion (512) (e.g., a side facing the +y direction). For example, the second rail (531b) may be formed on the other side of the second portion (512) (e.g., a side facing the -y direction). For example, the second portion (512) may have a partial curvature to correspond to the shape of the first rotary rail (531).

[0129] For example, the second arm (412) may include a second rotary rail (532). For example, the second rotary rail (532) may be formed on both sides of the fourth portion (514). For example, the second rotary rail (532) may include a third rail (532a) and a fourth rail (532b). For example, the third rail (532a) may be formed on one side of the fourth portion (514) (e.g., the side facing the +y direction). For example, the fourth rail may be formed on the other side of the fourth portion (514) (e.g., the side facing the -y direction). For example, the fourth portion (514) may have a partial curvature to correspond to the shape of the second rotary rail (532).

[0130] For example, the first rotary member (410) can be coupled with the guide member (420). For example, the rotary rail (530) can be inserted into the guide groove (540) of the guide member (420).

[0131] Referring to FIG. 5B, the guide member (420) may include a first guide member (421) and a second guide member (422). For example, the guide member (420) may guide the rotation of a first rotation member (e.g., the first rotation member (410) of FIG. 5A). For example, the guide member (420) may include a guide groove (540) into which a rotary rail (e.g., the rotary rail (530) of FIG. 5A) is inserted and for guiding the movement of the rotary rail (530). For example, the shape of the guide groove (540) may correspond to the shape of the rotary rail (530).

[0132] For example, the guide member (420) may be coupled to a second hinge cover (e.g., the second hinge cover (312) of FIG. 4A). For example, the first guide member (421) and the second guide member (422) may include at least one through hole (503, 504) into which a screw (S) is inserted. For example, the screw (S) may pass through at least one third through hole (503) of the first guide member (421) and be inserted into the second hinge cover (312), thereby allowing the first guide member (421) to be coupled to the second hinge cover (312). For example, the screw (S) may pass through at least one fourth through hole (504) of the second guide member (422) and be inserted into the second hinge cover (312), thereby allowing the second guide member (422) to be coupled to the second hinge cover (312).

[0133] For example, the first guide member (421) may include a first guide groove (541). For example, the first guide groove (541) may include a first groove (541a) that can accommodate a first rail of the first arm (411) (e.g., the first rail (531a) of FIG. 5A) and a second groove (541b) that can accommodate a third rail of the second arm (412) (e.g., the third rail (532a) of FIG. 5A). For example, the first rail (531a) may be inserted into the first groove (541a) and move along the first groove (541a). For example, the third rail (532a) may be inserted into the second groove (541b) and move along the second groove (541b).

[0134] For example, the second guide member (422) may include a second guide groove (542). For example, the second guide groove (542) may include a third groove (542a) that can accommodate a second rail of the first arm (411) (e.g., the second rail (531b) of FIG. 5a) and a fourth groove (542b) that can accommodate a fourth rail of the second arm (412) (e.g., the fourth rail (532b) of FIG. 5a). For example, the second rail (531b) may be inserted into the third groove (542a) and move along the third groove (542a). For example, the fourth rail (532b) may be inserted into the fourth groove (542b) and move along the fourth groove (542b).

[0135] For example, the second guide member (422) may include openings (550) into which shafts connected to a second gear set (e.g., the second gear set (330) of FIG. 3A) may be engaged. For example, if the second gear set (330) includes six gears, the second guide member (422) may include six openings (550). The shafts of the second gear set (330) may rotate within the openings (550) of the second guide member (422).

[0136] Referring to FIG. 5C, since the size of the second part (512) is smaller than the size of the first part (511) and the size of the fourth part (514) is smaller than the size of the third part (513), a space can be formed between the first arm (411) and the second arm (412) to which the guide member (420) can be coupled. For example, the first guide member (421) can be coupled to one side (e.g., in the +y direction) of the first rotation member (410). For example, the first guide member (421) can be coupled to the one side of the second part (512) and the fourth part (514). For example, the second guide member (422) can be coupled to the other side (e.g., in the -y direction) of the second rotation member (440). For example, the second guide member (422) can be coupled to the other side of the second part (512) and the fourth part (514). For example, the first guide member (421) and the second guide member (422) can be spaced apart from each other along the direction in which the second folding axis (242) extends (e.g., the y-axis direction) with the second part (512) and the fourth part (514) interposed therebetween. For example, the first rotation member (410) can be rotated by the rotary rail (530) moving along the guide groove (540). For example, in the first state or the second state in which the second housing part (e.g., the second housing part (220) of FIG. 3A) and the third housing part (e.g., the third housing part (230) of FIG. 3A) are unfolded, the first arm (411) can be rotated clockwise about the second folding axis (242), and the second arm (412) can be rotated counterclockwise about the second folding axis (242). For example, in the third state in which the second housing part (220) and the third housing part (230) are folded, the first arm (411) can be rotated counterclockwise about the second folding axis (242), and the second arm (412) can be rotated clockwise about the second folding axis (242).

[0137] Fig. 6a is a cross-sectional view of the second hinge assembly taken along line A-A' of Fig. 5c. Fig. 6b illustrates the operation of the first rotation member when the first and second arms are not coupled. Fig. 6c illustrates the operation of the first rotation member when the first and second arms are coupled.

[0138] Referring to FIG. 6A, the guide member (420) can guide the rotation of the first rotation member (410). For example, the first rail (531a) of the first arm (411) can be inserted into the first groove (541a) of the first guide member (421), and the third rail (532a) of the second arm (412) can be inserted into the second groove (541b) of the first guide member (421). By an external force applied to the foldable housing (200), the first rail (531a) can slide along the first groove (541a), and the second rail (531b) can slide along the second groove (541b).

[0139] For example, the first rotation member (410) can be rotated about the first rotation axis (401). For example, the first rotation axis (401) can include a first axis (610), which is a rotation axis of the first arm (411), and a second axis (620), which is a rotation axis of the second arm (412). For example, when the first arm (411) is rotated clockwise about the first axis (610), the second housing part (e.g., the second housing part (220) of FIG. 3A) can be rotated clockwise. For example, when the second arm (412) is rotated counterclockwise about the second axis (620), the third housing part (e.g., the third housing part (230) of FIG. 3A) can be rotated counterclockwise. By the counterclockwise rotation of the third housing part (230) and the clockwise rotation of the second housing part (220), the third housing part (230) and the second housing part (220) can be folded. For example, by the counterclockwise rotation of the first arm (411) about the first axis (610), the second housing part (220) can be rotated counterclockwise. For example, by the clockwise rotation of the second arm (412) about the second axis (620), the third housing part (230) can be rotated clockwise. By the clockwise rotation of the third housing part (230) and the counterclockwise rotation of the second housing part (220), the second housing part (220) and the third housing part (230) can be unfolded.

[0140] Referring to FIG. 6B, when the first rotation member (410) is rotated using only the guide member (420), the rotation of the second housing part (220) and the rotation of the third housing part (230) may not be linked to each other. For example, when there is no structure (e.g., the second gear set (330)) that links the rotation of the first arm (411) and the rotation of the second arm (412) and no structure (e.g., the slot (920) of the connecting member (430)) that limits the rotation of the first arm (411) and the rotation of the second arm (412), the first arm (411) and the second arm (412) may each rotate independently, become detached from the guide member (420), or cause damage to the flexible display (e.g., the flexible display (271) of FIG. 2) and / or the second hinge assembly (252).

[0141] For example, when the first arm (411) and the second arm (412) are not linked, the first arm (411) and the second arm (412) can rotate independently. Referring to 601 of FIG. 6B, even if the second arm (412) rotates, the first arm (411) may not rotate. Referring to 602 of FIG. 6B, the rotation angle of the first arm (411) may be different from the rotation angle of the second arm (412). Referring to 603 of FIG. 6B, when the rotation angle of the second arm (412) (or the first arm (411)) is too large (e.g., an obtuse angle exceeding 90 degrees), the second arm (412) (or the first arm (411)) may be disengaged from the guide groove (540).

[0142] Referring to FIG. 6C, when the first arm (411) and the second arm (412) are linked, the rotation angle of the first arm (411) may correspond to the rotation angle of the second arm (412). For example, 604 of FIG. 6C illustrates the first arm (411) and the second arm (412) within the first state (or the second state). For example, 607 of FIG. 6C illustrates the first arm (411) and the second arm (412) within the third state. For example, when the foldable electronic device (101) transitions from the first state (or the second state) to the third state, the first rotation member (410) may go through 605 of FIG. 6C and 606 of FIG. 6C. For example, referring to 604 of FIG. 6C, within the first state, the first arm (411) and the second arm (412) can be arranged substantially on the same plane. For example, by an external force applied to the foldable housing (200), the first arm (411) and the second arm (412) can be rotated along the guide groove (540) of the guide member (420). Referring to 605 of FIG. 6C and 606 of FIG. 6C, the first arm (411) and the second arm (412) can be rotated in conjunction with each other. For example, the rotation of the first arm (411) causes the rotation of the second arm (412), so that the rotation angle of the second arm (412) can correspond to the rotation angle of the first arm (411). As illustrated in FIG. 6c, as the first arm (411) and the second arm (412) rotate in a mutually interlocked state, the second housing part (e.g., the second housing part (220) of FIG. 3a) and the third housing part (e.g., the third housing part (230) of FIG. 3a) can rotate in a mutually interlocked state. The folding and unfolding operations of the second housing part (220) and the third housing part (230) can be stably performed.

[0143] Below, a structure for linking the rotation of the second housing part (220) and the rotation of the third housing part (230) is described. With reference to FIGS. 7a, 7b, and 7c, the meshing structure of the gears is described.

[0144] Figure 7a illustrates a first gear set of a first hinge assembly. Figure 7b illustrates a second gear set of a second hinge assembly. Figure 7c schematically illustrates the first hinge assembly and the second hinge assembly.

[0145] Referring to FIG. 7A, the first hinge assembly (251) may include a first gear set (320). For example, the first gear set (320) may include a first gear (701), a second gear (702), a third gear (703), and a fourth gear (704). For example, the first gear (701) may be positioned at one end of the gears included in the first gear set (320), and the second gear (702) may be positioned at the other end opposite to the one end of the gears included in the first gear set (320). For example, the third gear (703) and the fourth gear (704) may be positioned between the first gear (701) and the second gear (702).

[0146] For example, the rotation direction of the first gear (701) may be different from the rotation direction of the second gear (702). For example, when the first gear (701) rotates clockwise (or counterclockwise), the second gear (702) may rotate counterclockwise (or clockwise).

[0147] For example, the third gear (703) may be positioned between the first gear (701) and the fourth gear (704). For example, the fourth gear (704) may be positioned between the third gear (703) and the second gear (702). For example, the third gear (703) may engage with the first gear (701) and the fourth gear (704). For example, the fourth gear (704) may engage with the third gear (703) and the second gear (702). For example, when the first gear (701) rotates clockwise, the third gear (703) engaged with the first gear (701) may rotate counterclockwise. As the third gear (703) rotates counterclockwise, the fourth gear (704) meshed with the third gear (703) can rotate clockwise. As the fourth gear (704) rotates clockwise, the second gear (702) meshed with the fourth gear (704) can rotate counterclockwise. The first gear (701) and the second gear (702), which are spaced apart from each other, can rotate in different directions, thereby enabling folding and unfolding operations of the first housing part (e.g., the first housing part (210) of FIG. 3A) and the third housing part (e.g., the third housing part (230) of FIG. 3A).

[0148] Referring to FIG. 7B, the second hinge assembly (252) may include a second gear set (330). For example, the second gear set (330) may include a fifth gear (705), a sixth gear (706), a seventh gear (707), an eighth gear (708), a ninth gear (709), and a tenth gear (710). For example, the second gear set (330) may include more gears than the first gear set (e.g., the first gear set (320) of FIG. 7A). For example, the first gear set (320) may include four gears, and the second gear set (330) may include six gears. For example, the first gear set (320) may include two idle gears (e.g., the third gear (703) and the fourth gear (704)), and the second gear set (330) may include four idle gears (e.g., the seventh gear (707), the eighth gear (708), the ninth gear (709), and the tenth gear (710)). For example, the second number (n2) of idle gears included in the second gear set (330) (e.g., the seventh gear (707), the eighth gear (708), the ninth gear (709), and the tenth gear (710)) may be an even number (e.g., 2, 4, 8) more than the first number (n1) of idle gears included in the first gear set (320) (e.g., the third gear (703) and the fourth gear (704)).

[0149] For example, the fifth gear (705) may be placed at one end of the gears included in the second gear set (330), and the sixth gear (706) may be placed at the other end opposite to the one end of the gears included in the second gear set (330).

[0150] For example, the seventh gear (707), the eighth gear (708), the ninth gear (709), and the tenth gear (710) may be arranged between the fifth gear (705) and the sixth gear (706). For example, the fifth gear (705) may mesh with the seventh gear (707). The sixth gear (706) may mesh with the tenth gear (710). The seventh gear (707) may mesh with the fifth gear (705) and the eighth gear (708) between the fifth gear (705) and the sixth gear (706). The eighth gear (708) may mesh with the seventh gear (707) and the ninth gear (709) between the fifth gear (705) and the sixth gear (706). The ninth gear (709) can mesh with the eighth gear (708) and the tenth gear (710) between the fifth gear (705) and the sixth gear (706). The tenth gear (710) can mesh with the sixth gear (706) and the ninth gear (709). For example, the second gear set (330) can be arranged in the following order: fifth gear (705) - seventh gear (707) - eighth gear (708) - ninth gear (709) - tenth gear (710) - sixth gear (706).

[0151] For example, the rotation direction of the fifth gear (705) may be different from the rotation direction of the sixth gear (706). For example, when the fifth gear (705) rotates clockwise (or counterclockwise), the sixth gear (706) may rotate counterclockwise (or clockwise).

[0152] For example, when the fifth gear (705) rotates clockwise, the seventh gear (707) that is engaged with the fifth gear (705) can rotate counterclockwise. As the seventh gear (707) rotates counterclockwise, the eighth gear (708) that is engaged with the seventh gear (707) can rotate clockwise. As the eighth gear (708) rotates clockwise, the ninth gear (709) that is engaged with the eighth gear (708) can rotate counterclockwise. As the ninth gear (709) rotates counterclockwise, the tenth gear (710) that is engaged with the ninth gear (709) can rotate clockwise. As the tenth gear (710) rotates clockwise, the sixth gear (706) that is engaged with the tenth gear (710) can rotate counterclockwise. The fifth gear (705) and the sixth gear (706), which are spaced apart from each other, can be rotated in different directions to enable folding and unfolding of the second housing part (e.g., the second housing part (220) of FIG. 3a) and the third housing part (e.g., the third housing part (230) of FIG. 3a).

[0153] For example, the first hinge assembly (251) may include a rotation axis (701a) of the first gear (701), a rotation axis (702a) of the second gear (702), a rotation axis (703a) of the third gear (703), and a rotation axis (704a) of the fourth gear (704). The second hinge assembly (252) may include a rotation axis (705a) of the fifth gear (705), a rotation axis (706a) of the sixth gear (706), a rotation axis (707a) of the seventh gear (707), a rotation axis (708a) of the eighth gear (708), a rotation axis (709a) of the ninth gear (709), and a rotation axis (710a) of the tenth gear (710). For example, the second hinge assembly (252) may include more rotation axes than the first hinge assembly (251). For example, the number of rotation axes of the second hinge assembly (252) may be an even number (e.g., 2, 4, 8) more than the number of rotation axes of the first hinge assembly (251).

[0154] Figure 7c schematically illustrates a first hinge cover (311) containing a first gear set (320) and a second hinge cover (312) containing a second gear set (330). As described above, the size of the second hinge cover (312) may be larger than the size of the first hinge cover (311).

[0155] Referring back to FIG. 3A, within the first state, the first support member (211), the second support member (221), and the third support member (231) may form substantially the same plane. If, within the first state, the first support member (211), the second support member (221), and the third support member (231) do not form substantially the same plane, the surface of a flexible display (e.g., the flexible display (271) of FIG. 2) disposed on (e.g., in the +z direction) the support members (211, 221, 231) may not be flat. If the surface of the flexible display (271) is not flat, the visibility of a screen displayed within a display area of ​​the flexible display (271) may deteriorate. For example, the first support member (211), the second support member (221), and the third support member (231) may have substantially the same thickness. As the first support member (211), the second support member (221), and the third support member (231) have substantially the same thickness, the thickness of the first hinge cover (311) and the thickness of the second hinge cover (312) may be substantially the same.

[0156] Referring again to FIG. 7c, the thickness (312a) of the second hinge cover (312) may be substantially the same as the thickness (311a) of the first hinge cover (311). For example, since the number of first gear sets (320) (e.g., 4) and the number of second gear sets (330) (e.g., 6) are different, the width (312b) of the second hinge cover (312) may be different from the width (311b) of the first hinge cover (311). For example, the width (312b) of the second hinge cover (312) may be wider than the width (311b) of the first hinge cover (311).

[0157] For example, the first gear set (320) may include four gears, taking into account the thickness of the foldable housing (200) and the minimum dimensions of the gears. For example, the second gear set (330) may include six gears, taking into account the thickness of the foldable housing (200), the thickness (312a) and width (312b) of the second hinge cover (312), and the minimum dimensions of the gears.

[0158] For example, if the second gear set (330) includes less than six gears (e.g., four), the less than six gears may not be suitable for the size of the second hinge cover (312). For example, if the diameters of the four gears are designed so that the four gears can fill the width (312b) of the second hinge cover (312), the thickness (312a) of the second hinge cover (312) may be insufficient. If the thickness (312a) of the second hinge cover (312) is increased to accommodate the four gears, the thickness of the foldable housing (200) may increase. For example, if four gears having a diameter corresponding to the thickness (312a) of the second hinge cover (312) are arranged at both ends of the second hinge cover (312), the four gears may not mesh with each other.

[0159] For example, if the second gear set (330) includes more than six (e.g., eight) gears, the more than six gears may not be suitable for the minimum dimensions of the gears. For example, if eight gears are accommodated within the second hinge cover (312), the diameters of the eight gears may be so small that they are difficult to process and may have low durability. For example, if the dimensions of the shafts for the eight gears are formed too small, the processing of the shafts may be difficult and the durability may be reduced.

[0160] For example, the second gear set (330) may include six gears. The six gears may be suitable for accommodation within the second hinge cover (312), may not cause an increase in the thickness of the foldable housing (200), and may have a processable diameter.

[0161] Referring again to FIG. 7B, the second gear set (330) can be paired. For example, the fifth gear (705) can be paired with the sixth gear (706). For example, the seventh gear (707) can be paired with the tenth gear (710). For example, the eighth gear (708) can be paired with the ninth gear (709). For example, the size of the fifth gear (705) can be substantially the same as the size of the sixth gear (706). For example, the size of the seventh gear (707) can be substantially the same as the size of the tenth gear (710). For example, the size of the eighth gear (708) can be substantially the same as the size of the ninth gear (709).

[0162] Referring back to FIG. 4A, if the thickness of the second hinge cover (312) is constant, damage to the second hinge cover (312) may be caused by the rotation of the second housing part (220) and the third housing part (230). As illustrated in FIG. 4A, the second hinge cover (312) may have a shape in which the thickness of both ends becomes thinner. For example, both ends of the second hinge cover (312) may be partially bent to correspond to the rotational curvature of the second housing part (220) and the third housing part (230). For example, the second hinge cover (312) may not interfere with the rotation of the second housing part (220) and the third housing part (230) by having the above shape.

[0163] Referring again to FIG. 7b, since the second hinge cover (e.g., the second hinge cover (312) of FIG. 4a) has a shape in which the thickness of both ends becomes thinner as described above, the second gear set (330) can be arranged to correspond to the shape of the second hinge cover (312). For example, a flexible display (e.g., the flexible display (271) of FIG. 2) can be arranged above (e.g., in the +z direction) the second hinge cover (312).

[0164] According to one embodiment, in the folded state of the foldable electronic device (101), the distance (D1) between the rotation axis (708a) of the eighth gear (708) (or the rotation axis (709a) of the ninth gear (709)) and the rear side (720) of the flexible display (271) may be longer than the distance (D2) between the rotation axis (705a) of the fifth gear (705) (or the rotation axis (706a) of the sixth gear (706)) and the rear side (720) of the flexible display (271), and shorter than the distance (D3) between the rotation axis (707a) of the seventh gear (707) (or the rotation axis (710a) of the tenth gear (710)) and the rear side (720) of the flexible display (270). When looking at the second gear set (330) from the front, the gears included in the second gear set (330) can be arranged roughly in the shape of the letter W.

[0165] For example, the second gear set (330) may have various sizes to correspond to the shape of the second hinge cover (312). For example, the eighth gear (708) and the ninth gear (709) may have the largest sizes among the second gear sets (330). For example, the fifth gear (705) and the sixth gear (706) may have the smallest sizes among the second gear sets (330). For example, the size of the eighth gear (708) (or the size of the ninth gear (709)) may be larger than the size of the fifth gear (705) (or the size of the sixth gear (706)) and the size of the seventh gear (707) (or the size of the tenth gear (710)). For example, the size of the fifth gear (705) (or the size of the sixth gear (706)) may be smaller than the size of the seventh gear (707) (or the size of the tenth gear (710)).

[0166] By the arrangement structure and size of the second gear set (330) described above, the second gear set (330) can be stably operated within the second hinge cover (312).

[0167] Referring again to FIG. 7a, the first gear set (320) may also not be arranged in a row to correspond to the shape of the first hinge cover (311).

[0168] According to one embodiment, in the folded state of the foldable electronic device (101), the distance (D4) between the rotation axis (701a) of the first gear (701) (or the rotation axis (702a) of the second gear (702)) and the rear side (720) of the flexible display (271) may be shorter than the distance (D5) between the rotation axis (703a) of the third gear (703) (or the rotation axis (704a) of the fourth gear (704)) and the rear side (720) of the flexible display (271).

[0169] For example, the size of the first gear (701) may be substantially the same as the size of the second gear (702). For example, the size of the third gear (703) may be substantially the same as the size of the fourth gear (704). For example, the size of the first gear (701) (or the size of the second gear (702)) may be different from the size of the third gear (703) (or the size of the fourth gear (704)).

[0170] Below, the interlocking structure of the first rotation member (410) and the second rotation member (440) is described.

[0171] Figure 8a illustrates the shafts of the first hinge assembly and the shafts of the second hinge assembly. Figure 8b illustrates the second rotation member of the second hinge assembly.

[0172] In the first hinge assembly (251) illustrated in FIG. 8a, the gears between the first gear (701) and the fourth gear (704), which are arranged at both ends, among the gears included in the first gear set (320), are omitted. In the second hinge assembly (252) illustrated in FIG. 8a, the gears between the fifth gear (705) and the sixth gear (706), which are arranged at both ends, among the second gear set (330), are omitted.

[0173] Referring to FIG. 8A, the first hinge assembly (251) may include a first shaft (811) and a second shaft (812). For example, the first shaft (811) may be coupled to a first gear (701). For example, the second shaft (812) may be coupled to a second gear (702).

[0174] For example, the second hinge assembly (252) may include a third shaft (813) and a fourth shaft (814). For example, the third shaft (813) may be connected to a sixth gear (706). For example, the fourth shaft (814) may be connected to a sixth gear (706).

[0175] For example, since the size of the second hinge assembly (252) is larger than the size of the first hinge assembly (251), the first gap (801) between the third shaft (813) and the fourth shaft (814) may be wider than the second gap (802) between the first shaft (811) and the second shaft (812). For example, the second gear (702) and the third gear (703) may be arranged within the first gap (801). For example, the seventh gear (707), the eighth gear (708), the ninth gear (709), and the tenth gear (710) may be arranged within the second gap (802).

[0176] For example, the diameter (813a) of the third shaft (813) and the diameter (814a) of the fourth shaft (814) may be larger than the diameter (811a) of the first shaft (811) and the diameter (812a) of the second shaft (812). For example, the rotational range of the second housing part (e.g., the second housing part (220) of FIG. 3A) and the third housing part (e.g., the third housing part (230) of FIG. 3A) rotated by the second hinge assembly (252) may be larger than the rotational range of the first housing (e.g., the first housing part (210) of FIG. 3A) and the third housing part (230) rotated by the first hinge assembly (251). In the case of the second hinge assembly (252) that causes a relatively large rotation range, the force applied to the third shaft (813) and the fourth shaft (814) may be relatively large. In order to increase the rigidity of the third shaft (813) and the rigidity of the fourth shaft (814) to withstand the force, the diameter (813a) of the third shaft (813) and the diameter (814a) of the fourth shaft (814) may be relatively larger than the diameter (811a) of the first shaft (811) and the diameter (812a) of the second shaft (812).

[0177] For example, the first hinge assembly (251) may be configured to rotate the third housing part (230) together with the rotation of the first housing part (210), by the rotation of the first shaft (811) according to the rotation of the first housing part (210), the rotation of the first gear (701) according to the rotation of the first shaft (811), the rotation of the third gear (703) according to the rotation of the first gear (701), the rotation of the fourth gear (704) according to the rotation of the third gear (703), the rotation of the second shaft (812) according to the rotation of the fourth gear (704), and the rotation of the third housing part (230) according to the rotation of the second shaft (812).

[0178] For example, the second hinge assembly (252) rotates the third shaft (813) according to the rotation of the second housing part (220), the fifth gear (705) according to the rotation of the third shaft (813), the seventh gear (707) according to the rotation of the fifth gear (705), the eighth gear (708) according to the rotation of the seventh gear (707), the ninth gear (709) according to the rotation of the eighth gear (708), the tenth gear (710) according to the rotation of the ninth gear (709), the sixth gear (706) according to the rotation of the tenth gear (710), the fourth shaft (814) according to the rotation of the sixth gear (706), and the third housing part (230) according to the rotation of the fourth shaft (814). It can be configured to rotate the third housing part (230).

[0179] Referring to FIG. 8B, the second rotational member (440) can be rotated in conjunction with the operation of the second gear set (330). For example, the rotation of the second gear set (330) can cause the rotation of the second rotational member (440), and the rotation of the second rotational member (440) can cause the rotation of the first rotational member (410).

[0180] The second rotation member (440) illustrated in FIG. 8B may include a first arm support (441) and a second arm support (442). For example, the structure of the first arm support (441) and the structure of the second arm support (442) may be symmetrical with respect to the second folding axis (242). For example, the first arm support (441) and the second arm support (442) may be arranged symmetrically with respect to each other with the second folding axis (242) therebetween.

[0181] For example, the first arm support (441) can be coupled with the third shaft (813). For example, the first arm support (441) can include a first connecting portion (821) and a second connecting portion (822) into which the third shaft (813) is inserted. For example, the third shaft (813) can be coupled to the first arm support (441) by penetrating through a first opening (831) formed in the first connecting portion (821) and a second opening (832) formed in the second connecting portion (822). For example, the second arm support (442) can be coupled with the fourth shaft (814). For example, the second arm support (442) can include a third connecting portion (823) and a fourth connecting portion (824) into which the fourth shaft (814) is inserted. For example, the third shaft (813) can be coupled to the first arm support (441) by penetrating through the third opening (833) formed in the third connecting portion (823) and the fourth opening (834) formed in the fourth connecting portion (824). The third shaft (813) and the fourth shaft (814) are stably coupled to the first arm support (441) and the second arm support (442) through two openings, respectively, so that damage to the third shaft (813) and the fourth shaft (814) due to torsion can be reduced.

[0182] For example, the second rotation member (440) can be rotated about the second rotation axis (402). For example, the second rotation axis (402) can include a third axis (841) which is a rotation axis of the first arm support (441) and a fourth axis (842) which is a rotation axis of the second arm support (442). For example, the third axis (841) can overlap with the third shaft (813), and the fourth axis (842) can overlap with the fourth shaft (814).

[0183] For example, when an external force is applied, the first arm support (441) can be rotated clockwise about the third axis (841). The clockwise rotation of the first arm support (441) can cause the clockwise rotation of the first arm (411). For example, the clockwise rotation of the first arm (411) can be caused by the movement of the first protrusion (e.g., the first protrusion (911) of FIG. 9B) to be described later within the first slot (e.g., the first slot (921) of FIG. 9B). When the first arm support (441) is rotated clockwise about the third axis (841), the third shaft (813) coupled to the first arm support (441) can be rotated. Since the third shaft (813) overlaps the third axis (841), the third shaft (813) can be rotated clockwise in place. Clockwise rotation of the third shaft (813) can cause clockwise rotation of the fifth gear (705) connected to the third shaft (813). Since the second gear sets (330) operate in conjunction with each other, clockwise rotation of the fifth gear (705) can cause counterclockwise rotation of the sixth gear (706). Counterclockwise rotation of the sixth gear (706) can cause counterclockwise rotation of the fourth shaft (814) connected to the sixth gear (706). Since the fourth shaft (814) overlaps the fourth axis (842), the fourth shaft (814) can rotate counterclockwise in place. When the fourth shaft (814) rotates counterclockwise, the second arm support (442) connected to the fourth shaft (814) can rotate counterclockwise. Counterclockwise rotation of the fourth shaft (814) can cause clockwise rotation of the second arm (412). For example, counterclockwise rotation of the second arm (412) can be caused by movement of the second protrusion (912) described below within the second slot (922).Through the aforementioned process, the second housing part (220) and the third housing part (230) can be folded in conjunction with each other. In the aforementioned process, when the rotation direction is reversed, the second housing part (220) and the third housing part (230) can be unfolded in conjunction with each other.

[0184] Fig. 9a illustrates the coupling relationship between the first rotation member, the connecting member, and the second rotation member of the second hinge assembly. Fig. 9b is a perspective view of a portion of the second hinge assembly. Fig. 9c illustrates a portion of the second hinge assembly in the first state or the second state. Fig. 9d illustrates a portion of the second hinge assembly in the third state.

[0185] Referring to FIGS. 9A and 9B, the connecting member (430) can link the first rotating member (410) and the second rotating member (440) and limit the limit angle of the first rotating member (410) and the rotation angle of the second rotating member (440).

[0186] For example, the connecting member (430) may be coupled to each of the first rotating member (410) and the second rotating member (440). For example, the connecting member may include a first connecting member (431) and a second connecting member (432). For example, the first connecting member (431) may be coupled to each of the first arm (411) and the first arm support (441).

[0187] For example, the first connecting member (431) can be coupled to the first arm (411). For example, a portion of the connecting member (430) can be coupled on the first recessed portion (511a). For example, the first connecting member (431) can include a fifth through hole (901) that is aligned with at least one first through hole (501) formed in the first recessed portion (511a). For example, a screw (e.g., a screw (S) of FIG. 4A) can pass through the at least one first through hole (501) and the fifth through hole (901) that are aligned with each other, and be inserted into the second support member (e.g., the second support member (221) of FIG. 4A), thereby coupling the first arm (411) and the first connecting member (431).

[0188] For example, the connecting member (430) may include a slot (920) into which a protrusion (910) of the second rotating member (440) is inserted. For example, when the second rotating member (440) is rotated, the protrusion (910) may move within the slot (920). Since the range of movement of the protrusion (910) is limited by the length of the slot (920), the ranges of rotation of the first rotating member (410) and the second rotating member (440) may be limited by the protrusion (910).

[0189] For example, the first connecting member (431) may include a first slot (921). For example, the first arm support (441) may include a first protrusion (911) inserted into the first slot (921). For example, the first protrusion (911) may be coupled to the first slot (921) so as to be movable within the first slot (921) by being tightly fitted within the first slot (921). For example, since the first protrusion (911) is movable within the first slot (921), the range of movement of the first protrusion (911) may be limited to the length of the first slot (921). For example, the range of movement of the first protrusion (911) may be limited from one end (921a) of the first slot (921) to the other end (921b) of the first slot (921) opposite to the one end (921a).

[0190] The first arm (411), the first arm support (441), and the first connecting member (431) illustrated in FIG. 9A may be symmetrical with respect to the second arm (e.g., the second arm (412) of FIG. 9B), the second arm support (e.g., the second arm support (442) of FIG. 9B), and the second connecting member (e.g., the second connecting member (432) of FIG. 9B) and the second folding axis (e.g., the second folding axis (242) of FIG. 5C), which are not illustrated in FIG. 9A. The descriptions of the first arm (411), the first arm support (441), and the first connecting member (431) may be substantially equally applied to the second arm (412), the second arm support (442), and the second connecting member (432). For example, the second connecting member (432) may be coupled with the second arm (412). For example, the second arm support (442) may include a second protrusion (912) inserted into a second slot (922) of the second connecting member (432).

[0191] Referring to FIG. 9B, at least two second elastic members (480) may be coupled to the third shaft (813) and the fourth shaft (814). For example, the at least two second elastic members (480) may include, but are not limited to, springs. For example, the two second elastic members (480) may include six springs. For example, the at least two second elastic members (480) may be positioned in a compressed state between the friction body (450) and the holder (470). For example, the restoring force of the at least two second elastic members (480) may enable a flex mode, which will be described later, by providing frictional force.

[0192] For example, the holder (470) can fix at least two second elastic members (480). For example, the friction body (450) can include a first friction body (451) and a second friction body (452) that are spaced apart from the holder (470) along an extension direction of the second folding axis (242) (e.g., the y-axis direction). For example, the holder (470) can be disposed between the first friction body (451) and the second friction body (452). For example, the at least two second elastic members (480) can be disposed in a compressed state between the first friction body (451) and the holder (470) and between the second friction body (452) and the holder (470). For example, three springs may be arranged between the first friction body (451) and the holder (470), and three springs may be arranged between the second friction body (452) and the holder (470). The holder (470) and the second friction body (452) may be coupled to a second hinge cover (e.g., the second hinge cover (312) of FIG. 4A) by a screw (e.g., the screw (S) of FIG. 4A). For example, the cover (460) may be in contact with the friction body (450). For example, the cover (460) may include a first cover (461) in contact with the first friction body (451) and a second cover (462) in contact with the second friction body (452).

[0193] Referring to FIG. 9c, in the first state or the second state, the protrusion (910) of the second rotation member (e.g., the second rotation member (440) of FIG. 4a) may be positioned at one end (921a, 922a) of the slot (920) of the connecting member (430). The cross-section of the second hinge assembly (252) illustrated in FIG. 9c may correspond to the cross-section taken along line B-B' of FIG. 9b.

[0194] For example, within the first state or the second state, the first protrusion (911) may contact one end (921a) of the first slot (921). For example, within the first state or the second state, the second protrusion (912) may contact one end (922a) of the second slot (922). For example, within the first state or the second state, the distance between the first protrusion (911) and the second protrusion (912) may be the farthest. For example, within the first state or the second state, the first protrusion (911) and the second protrusion (912) may be positioned the farthest from the second folding axis (242). Within the first state or the second state, the second housing part (220) and the third housing part (230) may be unfolded.

[0195] Referring to FIG. 9d, within the third state, the protrusion (910) of the second rotational member (e.g., the second rotational member (440) of FIG. 4a) may be positioned at the other end (921b, 922b) of the slot (920) of the connecting member (430) opposite to the one end (921a, 922a). The cross-section of the second hinge assembly (252) illustrated in FIG. 9d may correspond to the cross-section taken along line B-B' of FIG. 9b. For example, within the third state, the first protrusion (911) may contact the other end (921b) of the first slot (921). For example, within the third state, the second protrusion (912) may contact the other end (922b) of the second slot (922). For example, within the folded state of the second housing part (220) and the third housing part (230), the distance between the first protrusion (911) and the second protrusion (912) may be closest. For example, within the third state, the first protrusion (911) and the second protrusion (912) may be positioned closest to the second folding axis (242).

[0196] For example, when the foldable electronic device (101) transitions from the first state to the third state, or transitions from the third state to the first state, the protrusion (910) can move along the slot (920). For example, the protrusion (910) can move linearly within the slot (920). For example, when the protrusion (910) is blocked by one end (921a, 922a) or the other end (921b, 922b) of the slot (920) and cannot move, the rotation of the second rotation member (440) can be restricted. As the rotation of the second rotation member (440) is restricted, the rotation of the first rotation member (410) can also be restricted. Since the first rotation member (410) and the second rotation member (440) cannot rotate, the rotation of the second housing part (220) and the rotation of the third housing part (230) can be restricted.

[0197] For example, the length of the slot (920) can be set so that the foldable housing (200) can be deformed between the first state (or second state) and the third state. For example, when the protrusion (910) is positioned at one end (921a, 922a) of the slot (920), the foldable housing (200) becomes the first state (or second state), and when the protrusion (910) is positioned at the other end (921b, 922b) of the slot (920), the length between the one end (921a, 922a) and the other end (921b, 922b) can be set so that the foldable housing (200) becomes the third state. For example, since the movement of the protrusion (910) is limited by the slot (920), the first rotation member (410) can not be separated from the guide member (420).

[0198] Fig. 10a illustrates the operation process of the second hinge assembly. Fig. 10b illustrates a cross-section between the foldable housing and the second hinge assembly.

[0199] 1001 of FIG. 10A schematically illustrates the second hinge assembly (252) within a first state or a second state. 1003 of FIG. 10A schematically illustrates the second hinge assembly (252) within a third state. 1002 of FIG. 10A schematically illustrates the second hinge assembly (252) within an intermediate state between the first state or the second state and the third state. Referring to FIG. 10a, when the second rotation member (440) moves linearly along the slot (920) of the connecting member (430), the first rotation member (410) can be rotated about a first rotation axis (e.g., the first rotation axis (401) of FIG. 4b), and the second rotation member (440) can be rotated about a second rotation axis (e.g., the second rotation axis (402) of FIG. 4b).

[0200] Referring to 1001 of FIG. 10A, within the first state or the second state, the first rotational member (410) and the second rotational member (440) may be aligned in parallel. For example, within the first state or the second state, the first rotational member (410) and the second rotational member (440) may be arranged on substantially the same plane.

[0201] Referring to 1002 of FIG. 10A, during a transition from a first state or a second state to an intermediate state, the first rotational member (410) can be rotated about a first rotational axis (401). For example, during a transition from the first state or a second state to an intermediate state, the second rotational member (440) can be rotated about a second rotational axis (402). Within the intermediate state, since the first rotational axis (401) for the first rotational member (410) and the second rotational axis (402) for the second rotational member (440) are different, an angle (A) can be formed between the first rotational member (410) and the second rotational member (440). For example, during a transition from the first state or a second state to an intermediate state, the protrusion (910) of the second rotational member (440) can be moved along the slot (920) of the connecting member (430).

[0202] Referring to 1003 of FIG. 10A, within the third state, the first rotational member (410) and the second rotational member (440) may be aligned parallel again. For example, during the transition from the intermediate state to the third state, the angle (A) between the first rotational member (410) and the second rotational member (440) may decrease. When the foldable housing (200) transitions to the third state, the first rotational member (410) and the second rotational member (440) may be arranged on substantially the same plane.

[0203] For example, in an intermediate state where the first rotation member (410) and the second rotation member (440) are not parallel to each other, the second rotation member (440) may protrude. As the second rotation member (440) protrudes toward the flexible display (e.g., the flexible display (271) of FIG. 2), damage may be caused to the flexible display (271). Referring to FIG. 10B, due to the angle between the first rotation member (410) and the second rotation member (440) (e.g., angle (A) of FIG. 10A), even if the second rotation member (440) protrudes, the foldable housing (200) and the second rotation member (440) may have a partially sunken structure so as not to come into contact with the flexible display (e.g., the flexible display (271) of FIG. 2). For example, the second rotation member (440) may include a third recessed portion (1010) that is recessed in a direction opposite to the direction in which the flexible display (271) is arranged (e.g., the -z direction). For example, the third housing part (230) (and / or the second housing part (220)) may include a fourth recessed portion (1020) that is recessed in the direction (e.g., the -z direction). For example, when an angle (A) is formed between the first rotation member (410) and the second rotation member (440), when the second rotation member (440) protrudes, the protruding portion is accommodated in the third recessed portion (1010) and the fourth recessed portion (1020), thereby reducing contact with the flexible display (271). As contact by the flexible display (271) is reduced, damage to the flexible display (271) can be reduced.

[0204] Fig. 11a illustrates the operation process of the second hinge assembly. Fig. 11b is a cross-sectional view of the connection portion between the first rotation member and the guide member in the first or second state. Fig. 11c illustrates a portion of the second hinge assembly.

[0205] Referring to FIG. 11a, the rotation angle of the second housing part (e.g., the second housing part (220) of FIG. 3a) and the third housing part (e.g., the third housing part (230) of FIG. 3a) can be limited by the slot (920) of the connecting member (430) and the protrusion (910) of the second rotating member (e.g., the second rotating member (440) of FIG. 4a).

[0206] 1101 of FIG. 11a illustrates a protrusion (910) inserted into a slot (920) of a connecting member (430) within a first state or a second state. For example, within the first state or the second state, the protrusion (910) may contact one end (921a, 922a) of the slot (920). Even if a first external force (F1) is applied from above to below (e.g., in the -z direction) of the second hinge assembly (252) within a state where the protrusion (910) contacts one end (921a, 922a) of the slot (920), the first rotational member (410) and the second rotational member (440) may not rotate because the protrusion (910) is blocked by the end (921a, 922a) and cannot move. For example, the second housing part (220) may not be unfolded more than 180 degrees with respect to the third housing part (230). For example, when a second external force (F2) is applied from below to above (e.g., in the +z direction) of the second hinge assembly (252) within the first state or the second state, the protrusion (910) may move toward the other end (921b, 922b) of the slot (920).

[0207] 1102 of FIG. 11a illustrates a protrusion (910) inserted into a slot (920) of a connecting member (430) within an intermediate state. For example, within the intermediate state, the protrusion (910) may be positioned between one end (921a, 922a) and the other end (921b, 922b) of the slot (920). Since the protrusion (910) may move from one end (921a, 922a) to the other end (921b, 922b) by the second external force (F2), the first rotating member (410) and the second rotating member (440) may be rotated. For example, the second housing part (220) may be folded with respect to the third housing part (230).

[0208] 1103 of FIG. 11A illustrates a protrusion (910) inserted into a slot (920) of a connecting member (430) within a third state. For example, within the third state, the protrusion (910) may contact the other end (921b, 922b) of the slot (920). Even if a third external force (F3) is applied in a direction (e.g., +x direction) that causes the second housing part (220) to fold inward with respect to the third housing part (230) within a state where the protrusion (910) contacts the other end (921b, 922b) of the slot (920), the first rotational member (410) and the second rotational member (440) may not rotate because the protrusion (910) is blocked by the other end and cannot move. For example, the second housing part (220) may not be folded below 0 degrees with respect to the third housing part (230). For example, in the third state, when a fourth external force (F4) is applied in a direction (e.g., -x direction) that causes the second housing part (220) to unfold outward with respect to the third housing part (230), the protrusion (910) may move toward one end (921a, 922a) of the slot (920).

[0209] Referring to FIG. 11b, the rotation angle can be limited by the connection structure of the first rotation member (410) and the guide member (420).

[0210] For example, the rotary rail (530) of the first rotary member (410) can be inserted into the guide groove (540) of the guide member (420). As described above, the rotary rail (530) can enable the rotation of the first rotary member (410) by moving along the guide groove (540). For example, in order to limit the rotation of the first rotary member (410) in a direction that further unfolds the second housing part (e.g., the second housing part (220) of FIG. 3A) in the first state or the second state, the guide member (420) can include a stepped part (1110). For example, the rotary rail (530) having a curvature and the first part (511) (and the third part (513)) of the first rotary member (410) can be spaced apart. For example, a straight portion (1120) extending linearly between the rotary rail (530) and the first part (511) (and the third part (513)) may be formed. For example, the step portion (1110) of the guide member (420) may be in contact with the straight portion (1120). For example, even if an external force (F) pressing the first rotary member (410) is applied in the first state or the second state in which the second housing part (220) and the third housing part (230) are unfolded, the second housing part (220) may not unfold by more than 180 degrees with respect to the third housing part (230) because the straight portion (1120) is blocked by the step portion (1110).

[0211] Referring to FIG. 11c, the rotation angle can be limited by the cover (460), the friction body (450), and the second rotation member (440).

[0212] Referring to 1104 of FIG. 11C, the second rotation member (440) may include a protrusion (1130) that contacts the cover (460) in the first state or the second state. For example, the first arm (411) supporter may include a first protrusion (1131) that extends toward the cover (460). For example, the second arm (412) supporter may include a second protrusion (1132) that extends toward the cover (460). In the first state or the second state, the first protrusion (1131) and the second protrusion (1132) may contact a groove (1140) of the cover (460). For example, even if an external force (F) pressing the second rotation member (440) is applied in the first state or the second state in which the second housing part (220) and the third housing part (230) are unfolded, the second housing (e.g., the second housing part (220) of FIG. 3A) may not unfold more than 180 degrees with respect to the third housing (e.g., the third housing part (230) of FIG. 3A) because the first protrusion (1131) and the second protrusion (1132) are blocked by the cover (460). In 1104 of FIG. 11C, the rotation angle is illustrated as being limited by the second cover (462), but is not limited thereto. For example, the first cover (461) may also include a groove (1140) that comes into contact with the protrusion (1130) in the first state or the second state.

[0213] Referring to 1105 of FIG. 11c, the protrusions may be in contact with the friction body (450) within the first state or the second state. For example, within the first state or the second state, the first protrusions (1131) and the second protrusions (1132) may be in contact with the grooves (1150) of the friction body (450). For example, even if an external force (F) pressing the second rotation member (440) is applied within the first state or the second state in which the third housing part (230) and the second housing part (220) are unfolded, the second housing part (220) may not be unfolded more than 180 degrees with respect to the third housing part (230) because the first protrusions (1131) and the second protrusions (1132) are blocked by the friction body (450). In 1105 of FIG. 11c, the rotation angle is illustrated as being limited by the second friction body (452), but is not limited thereto. For example, the second friction body (452) may also include a groove (1150) that contacts the protrusion (1130) in the first state or the second state. Although not illustrated, the holder (470) may also include a groove that contacts the protrusion (1130) in the first state or the second state. The rotation angle may also be limited by the groove of the holder (470).

[0214] As described above, the rotation angle of the second housing part (220) with respect to the third housing part (230) may be limited. For example, when the second housing part (220) and the third housing part (230) are in the first or second state in which they are unfolded, if the second housing part (220) is further rotated outward with respect to the third housing part (230) due to an external force (e.g., a touch input) applied to the flexible display (271), the foldable housing (200) may be damaged by a rotation angle exceeding 180 degrees. For example, by limiting the rotation angle by the structures described above, the strength capable of withstanding the external force may be improved.

[0215] For example, in the third state where the second housing part (220) and the third housing part (230) are folded, if the second housing part (220) is further rotated inward with respect to the third housing part (230), the foldable housing (e.g., the foldable housing (200) of FIG. 3A) may be damaged by a rotation angle less than 0 degrees. For example, if the folding order (e.g., first state - second state - third state) of the foldable housing (200) that transitions from the first state to the third state through the second state is not maintained, and after transitioning directly from the first state to the third state (e.g., first state - third state), the second housing part (220) is further rotated inward, thereby additionally rotating the first housing part (210), and the foldable housing (200) may be damaged. For example, when the second housing part (220) is folded inward, if the second housing part (220) does not rotate further, the rotation angle of the first housing part (210) is limited by the second housing part (220), so the user can easily recognize that the foldable housing (200) has been folded in the wrong order. For example, damage to the foldable housing (200) due to folding the foldable housing (200) in the wrong order can be reduced.

[0216] Fig. 12a illustrates a portion of a first hinge assembly and a portion of a second hinge assembly. Fig. 12b is a cross-sectional view of the second hinge assembly taken along line C-C' of Fig. 12a. Fig. 12c illustrates a slot and a protrusion of the second hinge assembly. Fig. 12d illustrates states of the second hinge assembly according to a rotation angle of the second hinge assembly. Fig. 12e illustrates a third elastic member disposed within the slot.

[0217] Referring to FIG. 12A, the exemplary first hinge assembly (251) may include at least one first elastic member (1210). For example, the at least one first elastic member (1210) may include, but is not limited to, a spring that can be compressed or extended by an external force. The at least one first elastic member (1210) may have a restoring force to return to its original shape when compressed or extended.

[0218] For example, at least one first elastic member (1210) may be compressed by a CAM mechanism. For example, the CAM mechanism may include cam detents (1220) that include interlocking ridges. For example, when the first hinge assembly (251) is rotated, the interlocking cam detents (1220) may move along the ridges, thereby causing compression or extension of the at least one first elastic member (1210). The compression or extension of the at least one first elastic member (1210) may generate a frictional force between the cam detents (1220). The frictional force may act as a force (e.g., torque) that resists rotation of the first hinge assembly (251), thereby maintaining a folding angle of the first hinge assembly (251). By maintaining the folding angle of the first hinge assembly (251), a free stop or flex mode may be possible in which the first housing part (210) and the third housing part (230) are fixed within an intermediate state between an unfolded state of the second housing part (e.g., the second housing part (220) of FIG. 3A) and a folded state of the third housing part (e.g., the third housing part (230) of FIG. 3A) and a folded state of the first housing part (210) and the third housing part (230). For example, the first hinge assembly (251) may provide tactile feedback to the user when the first hinge assembly (251) is folded or unfolded by the frictional force. For example, the user may feel the first housing part (210) being folded or unfolded with respect to the third housing part (230) through the tactile feedback by the frictional force.

[0219] Referring to FIG. 12A, the exemplary second hinge assembly (252) may include at least two second elastic members (480). For example, the at least two second elastic members (480) may include, but are not limited to, springs that can be compressed or stretched by an external force. The at least two second elastic members (480) may have a restoring force to return to their original shape when compressed or stretched. For example, the number of the at least two second elastic members (480) may be greater than the number of the at least one first elastic member (1210).

[0220] Referring to FIGS. 12A and 12B, the second hinge assembly (252) may have a structure for having a thin thickness. For example, the thickness of structures overlapping the second rotation axis (402) for the second rotation member (440) may be relatively thin. For example, the thickness of the first connecting portion (821), the second connecting portion (822), the third connecting portion (823), and the fourth connecting portion (824) that support the third shaft (813) and the fourth shaft (814) may be relatively thin. For example, the first connecting portion (821) that surrounds the third shaft (813) may have a relatively thin thickness (t). Since the thicknesses of the first connecting portion (821), the second connecting portion (822), the third connecting portion (823), and the fourth connecting portion (824) are relatively thin, it may be difficult to apply the CAM structure to the second rotating member (440).

[0221] For example, when the thickness of the second hinge assembly (252) for the rotational operation of the third housing part (230) and the second housing (e.g., the second housing part (220) of FIG. 3A) is thick, the overall thickness of the foldable housing (e.g., the foldable housing (200) of FIG. 3A) may become thick. Since the foldable electronic device according to one embodiment (e.g., the foldable electronic device (101) of FIG. 3A) includes a foldable housing (200) having a structure in which three housing parts are folded, when the thickness of the foldable housing (200) is thick, it may be difficult to carry the foldable electronic device (101) in the third state. For example, in order to reduce the thickness of the foldable housing (200) in the third state in which the three housings are folded, the second hinge assembly (252) may not include a CAM structure.

[0222] For example, in the case of a CAM structure, if the folding and unfolding motion is repeated, damage (e.g., wear) may be caused by the protruding ridges. For example, since the second hinge assembly (252) includes more components than the components included in the first hinge assembly (251), when the CAM structure is applied to the second hinge assembly (252), the durability of the second hinge assembly (252) may be weakened. For example, the second hinge assembly (252) may not include the CAM structure.

[0223] Referring to FIG. 12c, the second hinge assembly (252) can provide tactile feedback to the user when the second hinge assembly (252) is folded or unfolded by utilizing the shape of the slot (920) formed in the connecting member (430) instead of the CAM structure.

[0224] For example, the slot (920) may include a first locking portion (920a) and a second locking portion (920b). For example, the first locking portion (920a) may be spaced apart from one end (921a, 922a) of the slot (920) by a specified distance. For example, the first locking portion (920a) may protrude toward the inside of the slot (920). For example, the first locking portion (920a) may include a first portion (920a-1) protruding downward from an upper portion of an edge of the slot (920) and / or a second portion (920a-2) protruding upward from a lower portion of an edge of the slot (920). For example, the second catch (920b) may be spaced apart from the other end (921b, 922b) of the slot (920) by a specified distance. For example, the second catch (920b) may protrude toward the inside of the slot (920). For example, the second catch (920b) may include a third portion (920b-1) protruding downward from the upper portion of the edge of the slot (920) and / or a fourth portion (920b-2) protruding upward from the lower portion of the edge of the slot (920).

[0225] For example, the force for moving the protrusion (910) can be increased by the first catch (920a) and the second catch (920b). For example, the width of the slot (920) can be reduced within the region where the first catch (920a) and the second catch (920b) are formed. For example, within the region where the first catch (920a) is formed, the width of the slot (920) can be reduced by the height of the first portion (920a-1) and the second portion (920a-2) protruding toward the inside of the slot (920). For example, within the region where the second catch (920b) is formed, the width of the slot (920) can be reduced by the height of the third portion (920b-1) and the fourth portion (920b-2) protruding toward the inside of the slot (920). For example, the protrusion (910) may require additional force when passing through the first engaging portion (920a) and the second engaging portion (920b) that form the width of the relatively narrow slot (920). For example, when the protrusion (910) passes through the first engaging portion (920a) and / or the second engaging portion (920b), additional force may be required to allow it to pass through the width of the relatively narrow slot (920). By the additional force, the protrusion (910) may pass through the first engaging portion (920a) and / or the second engaging portion (920b). For example, when the protrusion (910) passes through the first engaging portion (920a) and / or the second engaging portion (920b), the protrusion (910) may interfere with the first engaging portion (920a) and / or the second engaging portion (920b), thereby providing the user with a feeling of the second hinge assembly (252) being unfolded or folded. For example, the second hinge assembly (252), even if it does not include a CAM structure, may provide tactile feedback to the user through the first engaging portion (920a) and the second engaging portion (920b) within the slot (920).

[0226] For example, the position of the first catch (920a) and the position of the second catch (920b) can be set to positions that can provide tactile feedback according to the rotation angle of the second hinge assembly (252). For example, the length of the slot (920) can be set to correspond to the first state (or second state) and the third state of the foldable housing (e.g., the foldable housing (200) of FIG. 3A). For example, the length of the slot (920) can be set such that when the protrusion (910) contacts one end (921a, 922a) of the slot (920), the foldable housing (200) becomes the first state (or second state), and when the protrusion (910) is positioned at the other end (921b, 922b) of the slot (920), the foldable housing (200) becomes the third state. For example, the position of the first catch (920a) may be set to a position at which tactile feedback is provided when the foldable housing (200) is rotated by a specified angle (e.g., about 15 degrees) from the first state (or second state). For example, the position of the second catch (920b) may be set to a position at which tactile feedback is provided when the foldable housing (200) is rotated by a specified angle (e.g., about 75 degrees) from the first state (or second state).

[0227] Referring to FIG. 12d, the position of the first engaging portion (920a) and the position of the second engaging portion (920b) can be set to provide tactile feedback depending on the rotation angle of the second hinge assembly (252). In FIG. 12d, only the first protrusion (911) and the first slot (921) of the second hinge assembly (252) are illustrated, but the second protrusion (912) and the second slot (922) can be symmetrical with respect to the first protrusion (911) and the first slot (921) with respect to the second folding axis (242).

[0228] 1201 of FIG. 12d illustrates a state in which the protrusion (910) is in contact with one end (921a) of the first slot (921). Referring to 1201 of FIG. 12d, the foldable electronic device (101) may be in a first state or a second state. For example, within the first state or the second state, the first protrusion (911) may be positioned at a position furthest from the second folding axis (e.g., the second folding axis (242) of FIG. 3a). For example, within the first state or the second state, the movement of the first protrusion (911) may be limited by the first catch (920a), so that when an external force that allows the first protrusion (911) to pass through the first catch (920a) is not provided, the rotation of the second hinge assembly (252) may be limited.

[0229] 1202 of FIG. 12d illustrates a state in which the protrusion (910) passes through the first engaging portion (920a). For example, 1202 of FIG. 12d may represent a state rotated by an angle of about 15 degrees from 1201 of FIG. 12d, but is not limited thereto. Referring to 1202 of FIG. 12d, as the first arm (411) and the first arm support (e.g., the first arm support (441) of FIG. 4a) rotate, the first protrusion (911) may move from one end (921a) toward the other end (921b) within the first slot (921). For example, the first protrusion (911) may come into contact with the first engaging portion (920a) by moving toward the other end (921b). For example, when the first protrusion (911) passes through the first catch (920a), it must pass through the area of ​​the slot (920) having a relatively narrow width, so additional external force may be required. By the additional external force, while the first protrusion (911) passes through the first catch (920a), tactile feedback may be provided to the user by interference between the first catch (920a) and the first protrusion (911). Through the tactile feedback, the user may feel the second hinge assembly (252) being folded.

[0230] 1203 of FIG. 12d illustrates a state in which the protrusion (910) passes through the second engaging portion (920b). For example, 1203 of FIG. 12d may represent a state rotated by an angle of about 75 degrees from 1201 of FIG. 12d, but is not limited thereto. Referring to 1203 of FIG. 12d, as the first arm (411) and the first arm support (441) are further rotated, the first protrusion (911) may come into contact with the second engaging portion (920b) within the slot (920). For example, when the first protrusion (911) passes through the second engaging portion (920b), it must pass through an area of ​​the slot (920) having a relatively narrow width, and thus, additional external force may be required. By additional external force, while the first protrusion (911) passes through the second catch (920b), tactile feedback can be provided to the user by interference between the second catch (920b) and the first protrusion (911). Through the tactile feedback, the user can feel the second hinge assembly (252) being folded.

[0231] 1204 of FIG. 12d illustrates a state in which the protrusion (910) is in contact with the other end (921b) of the first slot (921). Referring to 1204 of FIG. 12d, the foldable electronic device (101) may be in a third state. For example, within the third state, the first protrusion (911) may be positioned at a position closest to the second folding axis (242). For example, within the third state, the movement of the first protrusion (911) may be limited by the second catch (920b), so that when an external force that allows the first protrusion (911) to pass through the second catch (920b) is not provided, the rotation of the second hinge assembly (252) may be limited.

[0232] Referring to FIG. 12e, instead of forming the first catch (920a) and / or the second catch (920b) within the slot (920), a third elastic member (1230) may be placed within the slot (920) to provide tactile feedback to the user.

[0233] For example, the third elastic member (1230) may be disposed within the slot (920). For example, the third elastic member (1230) may be disposed below the edge of the slot (920), but is not limited thereto. For example, the third elastic member (1230) may be a plate spring, but is not limited thereto. For example, the third elastic member (1230) may include a third catch (1231) and a fourth catch (1232). For example, the third catch (1231) may be spaced apart from one end (921a, 922a) of the slot (920) by a specified distance. For example, the third catch (1231) may protrude toward the inside of the slot (920). For example, the fourth catch (1232) may be spaced apart from one end (921a, 922a) of the slot (920) by a specified distance. For example, the fourth catch (1232) may protrude toward the inside of the slot (920).

[0234] For example, the width of the slot (920) may be reduced within the area where the third catch (1231) and the fourth catch (1232) are formed. For example, when the protrusion (910) passes through the third catch (1231) and / or the fourth catch (1232), additional force may be required to pass through the relatively narrow width of the slot (920). By the additional force, the protrusion (910) may pass through the third catch (1231) and / or the fourth catch (1232). For example, when the protrusion (910) passes through the third engaging portion (1231) and / or the fourth engaging portion (1232), the protrusion (910) may interfere with the third engaging portion (1231) and / or the fourth engaging portion (1232), thereby providing the user with a feeling of the second hinge assembly (252) being unfolded or folded. For example, the second hinge assembly (252), even without including a CAM structure, may provide tactile feedback to the user through the third elastic member (1230) within the slot (920).

[0235] Figure 13 illustrates a portion of the second hinge assembly.

[0236] Referring to FIG. 13, the second hinge assembly (252) may include at least two second elastic members (480). For example, the at least two second elastic members (480) may include, but are not limited to, six springs.

[0237] For example, at least two second elastic members (480) may be disposed between the friction body (450) and the holder (470). For example, at least two second elastic members (480) may be disposed between the first friction body (451) and the holder (470) and between the holder (470) and the second friction body (452).

[0238] For example, at least two second elastic members (480) may be arranged in a compressed state between the friction body (450) and the holder (470). For example, the distance between the friction body (450) and the holder (470) may be shorter than the length of the original shape of at least the second elastic members (480). When at least the second elastic members (480) are arranged between the friction body (450) and the holder (470), at least the second elastic members (480) may be arranged in a compressed state by the friction body (450) and the holder (470). Since at least the second elastic members (480) are arranged in a compressed state, a restoring force of at least the second elastic members (480) to return to their original shape may be applied to the second hinge assembly (252).

[0239] For example, the first restoring force by at least one second elastic member (480) disposed between the first friction body (451) and the holder (470) can push the first friction body (451) upward (e.g., in the +y direction). By the first restoring force, the first friction body (451) can be joined at a surface in contact with the second rotation member (440). For example, the first restoring force can press the first connection portion (821) and the third connection portion (823) of the first friction body (451) and the second rotation member (440) face-to-face.

[0240] For example, the second restoring force by at least one second elastic member (480) disposed between the second friction body (452) and the holder (470) can push the second friction body (452) downward (e.g., in the -y direction). By the second restoring force, the second friction body (452) can be pressed at a surface in contact with the second rotation member (440). For example, the second restoring force can press the second connection portion (822) and the fourth connection portion (824) of the second friction body (452) and the second rotation member (440) face-to-face.

[0241] For example, the surface-to-surface pressure by the first restoring force and the second restoring force may cause a frictional force. For example, the first restoring force may cause a frictional force between the first friction body (451) and the first connecting portion (821) and the third connecting portion (823). For example, the second restoring force may cause a frictional force between the second friction body (452) and the second connecting portion (822) and the fourth connecting portion (824). The frictional forces may act as a force (e.g., torque) that resists the rotation of the second rotating member (440), thereby maintaining the folding angle of the second hinge assembly (252). For example, in the third state, after the first rotational member (410) and the second rotational member (440) are rotated by about 45 degrees by an external force, when the external force is removed, the second rotational member (440) may not rotate due to the frictional forces. Since the second rotational member (440) may be fixed without rotating, the first rotational member (410) and the second rotational member (440) may maintain the state of being rotated by about 45 degrees. A free stop or flex mode may be possible due to the frictional forces.

[0242] The exemplary second hinge assembly (252) may provide a free stop or flex mode by utilizing frictional forces of the engaging portions (e.g., the first engaging portion (920a) and / or the second engaging portion (920b) of FIG. 12c) within the aforementioned slot (920), the third elastic member (e.g., the third elastic member (1230) of FIG. 12e) disposed within the slot (920), and / or at least two second elastic members (480), without including a CAM structure. Since the exemplary second hinge assembly (252) does not include a CAM structure, a relatively thin thickness of the foldable housing (200) may be realized, the manufacturing process may be facilitated, and the wear-induced durability degradation of the CAM structure may be resolved.

[0243] Figure 14a is an exploded perspective view of a second hinge assembly and an exemplary second support plate. Figure 14b illustrates a state in which the second support plate is coupled to the second hinge cover. Figure 14c illustrates a flexible display according to a state of a foldable electronic device according to one embodiment.

[0244] Referring to FIGS. 14A and 14B , a foldable electronic device according to one embodiment (e.g., the foldable electronic device (101) of FIG. 3A ) may include two second hinge assemblies (252a, 252b). For example, the two second hinge assemblies (252a, 252b) may be substantially identical to the second hinge assemblies (252a, 252b) described above. For example, the two second hinge assemblies (252a, 252b) may be symmetrically disposed between a second housing part (e.g., the second housing part (220) of FIG. 3A ) and a third housing part (e.g., the third housing part (230) of FIG. 3A ). For example, the two second hinge assemblies (252a, 252b) may be symmetrically disposed with respect to the x-axis. For example, the two second hinge assemblies (252a, 252b) may be spaced apart from each other along the extension direction (e.g., y-axis direction) of the second folding axis (242). For example, a flexible printed circuit board (490) for electrically connecting a printed circuit board disposed within the second housing part (220) and a printed circuit board disposed within the third housing part (230) may be disposed between the two second hinge assemblies (252a, 252b). For example, a portion of the flexible printed circuit board (490) may cross the second hinge cover (312).

[0245] A foldable electronic device (101) according to one embodiment may include a second support plate (1420). For example, the second support plate (1420) may be disposed between two second hinge assemblies (252a, 252b). For example, the second support plate (1420) may be coupled to a second hinge cover (312). For example, the second support plate (1420) may include at least one through hole (1421) into which a screw (S) may be inserted. For example, the second hinge cover (312) may include coupling portions (312c, 312d) into which the screw (S) may be coupled. For example, the second support plate (1420) may be positioned on the second hinge cover (312) (e.g., in the +z direction) and may be coupled to the connecting portions (312c, 312d) by having a screw (S) pass through at least one through hole (1421). For example, the second support plate (1420) may overlap a portion of a flexible printed circuit board (490) that crosses the second hinge cover (312).

[0246] For example, the second support plate (1420) may support a portion of the flexible display (271). For example, the flexible display (271) may include a second bending portion (1440) that is folded or unfolded by the second housing part (220) and the third housing part (230). The second bending portion (1440) may be referred to as a deformable region of the flexible display (271). The second bending portion (1440) may be flat in the first state or the second state, and may be at least partially bent in the third state. For example, the second bending portion (1440) may be disposed on the second hinge assembly (252) (e.g., in the +z direction). For example, the second support plate (1420) can at least partially support the second bending portion (1440) that is positioned on the second hinge assembly (252) and deforms based on the state of the foldable housing (200). For example, the second support plate (1420) can at least partially contact the second bending portion (1440). For example, the second support plate (1420) can maintain a constant bent shape of the second bending portion (1440) by supporting the second bending portion (1440) and reduce damage to the second bending portion (1440).

[0247] Referring to FIG. 14c, depending on the state of the foldable electronic device (101), the flexible display (271) can be partially deformed.

[0248] 1401 and 1402 of FIG. 14C illustrate a flexible display (271) according to the rotational motion of the first housing part (210) and the third housing part (230). For example, 1401 of FIG. 14C illustrates the flexible display (271) in a first state. For example, 1402 of FIG. 14C illustrates the flexible display (271) in a second state or a third state. For example, the first bending portion (1430) of the flexible display (271) may be flat in the first state. For example, as the foldable electronic device (101) transitions from the first state to the second state or the third state, the first bending portion (1430) may be at least partially bent. The first bending portion (1430) may be referred to as a deformable region of the flexible display (271). For example, the region (1450) of the flexible display (271) disposed on the third housing part (230) and the region (1460) of the flexible display (271) disposed on the first housing part (210) may be flat in the second state or the third state, and the first bending portion (1430) disposed between the regions (1450, 1460) may be at least partially bent in the second state or the third state. The first bending portion (1430) that is bent depending on the state of the foldable electronic device (101) may not be attached to the third housing part (230) and the first housing part (210).

[0249] For example, the first support plate (1410) can support the first bending portion (1430) within the first state. For example, within the first state, the first support plate (1410) can support the flat first bending portion (1430). Within the first state, when an external force is applied to the first bending portion (1430) or a hard object is dropped, damage to the first bending portion (1430) caused by the external force or the object can be reduced by the first support plate (1410) supporting the first bending portion (1430). For example, within the second state or the third state, the first support plate (1410) can be spaced apart from the curved second bending portion (1440). For example, within the second state or the third state, the first support plate (1410) can be moved to a position where it does not support the first bending portion (1430).

[0250] 1403 and 1404 of FIG. 14C illustrate the flexible display (271) according to the rotational motion of the third housing part (230) and the second housing part (220). For example, 1403 of FIG. 14C illustrates the flexible display (271) in the first state or the second state. For example, 1404 of FIG. 14C illustrates the flexible display (271) in the third state. For example, the second bending portion (1440) of the flexible display (271) may be flat in the first state or the second state. For example, as the foldable electronic device (101) transitions from the first state or the second state to the third state, the second bending portion (1440) may be at least partially bent. For example, the area (1450) of the flexible display (271) disposed on the third housing part (230) and the area (1470) of the flexible display (271) disposed on the second housing part (220) may be flat within the third state, and the second bending portion (1440) disposed between the areas (1450, 1470) may be at least partially bent within the third state. For example, the second bending portion (1440) may include a flat portion (1441) that contacts the second support plate (1420) within the folded state of the foldable electronic device (101) and bent portions (1442, 1443) that are spaced apart from the second support plate (1420). The second bending portion (1440), which is bent depending on the state of the foldable electronic device (101), may not be attached to the third housing part (230) and the second housing part (220). For example, the second bending portion (1440) may be wider than the first bending portion (1430).

[0251] For example, the second support plate (1420) can at least partially support the second bending portion (1440). For example, in the first state or the second state, the second support plate (1420) can support the flat second bending portion (1440). In the first state or the second state, when an external force is applied to the second bending portion (1440) or a hard object is dropped, the second support plate (1420) supports the second bending portion (1440), so that damage to the second bending portion (1440) caused by the external force or the object can be reduced. For example, in the third state, the second support plate (1420) can support a portion of the bent second bending portion (1440) (e.g., the first portion (1441) of FIG. 15A). For example, in the absence of the second support plate (1420), within the third state, the second bending portion (1440) may protrude toward the second hinge cover (312). When the second bending portion (1440) protrudes, the curvature of the second bending portion (1440) increases, which may cause damage to a plurality of pixels within the second bending portion (1440). For example, the second support plate (1420) may reduce damage to the second bending portion (1440) by supporting the second bending portion (1440).

[0252] Figure 15a schematically illustrates the deformation process of a flexible display according to the operation of the second hinge assembly. Figure 15b illustrates the second hinge assembly and the second support plate. Figure 15c illustrates the first hinge assembly and the second hinge assembly.

[0253] Referring to FIG. 15a, when the third housing part (230) and the second housing part (220) are rotated, the second bending portion (1440) of the flexible display (271) can be at least partially bent.

[0254] For example, the second support plate (1420) can be moved in conjunction with the second gear set (e.g., the second gear set (330) of FIG. 4A). For example, when the second gear set (330) is operated by the rotation of the third housing part (230) and / or the second housing part (220), the second support plate (1420) can be moved in conjunction with the second gear set (330). For example, the position of the second support plate (1420) can be different depending on the rotation angles of the third housing part (230) and the second housing part (220).

[0255] For example, 1501 of FIG. 15A illustrates a portion of a flexible display (271) in a first state or a second state. Referring to 1501 of FIG. 15A, a portion of the flexible display (271) supported by the third housing part (230) and the second housing part (220) in the first state or the second state may be flat. The second bending portion (1440) in the first state or the second state may be flat. For example, the second support plate (1420) may support the flat second bending portion (1440).

[0256] 1502 of FIG. 15A illustrates a state in which the third housing part (230) and the second housing part (220) are rotated by about 15 degrees. 1503 of FIG. 15A illustrates a state in which the third housing part (230) and the second housing part (220) are rotated by about 30 degrees. Referring to 1502 and 1503 of FIG. 15A, the second bending portion (1440) may be bent within a state in which the third housing part (230) and the second housing part (220) are rotated by about 15 degrees to about 30 degrees. For example, when the second bending portion (1440) is bent, it may not be bent uniformly but may be bent unevenly. For example, the second bending portion (1440) may have a degree of bending closer to the third housing part (230) than a degree of bending closer to the second housing part (220). For example, the second support plate (1420) may support the second bending portion (1440) that is bent unevenly.

[0257] 1504 of FIG. 15A illustrates a state in which the third housing part (230) and the second housing part (220) are rotated by about 45 degrees. 1505 of FIG. 15A illustrates a state in which the second housing part (220) is rotated by about 60 degrees. Referring to 1504 and 1505 of FIG. 15A, the second bending portion (1440) can be uniformly bent within a state in which the third housing part (230) and the second housing part (220) are rotated by about 45 degrees to about 60 degrees. For example, the second support plate (1420) can support the second bending portion (1440) that is uniformly bent.

[0258] 1506 of FIG. 15A illustrates a third state, in which the third housing part (230) and the second housing part (220) are rotated approximately 90 degrees from the first state or the second state. For example, within the third state, the second bending portion (1440) may be partially bent. For example, the second support plate (1420) may support a portion (e.g., the first portion (1441)) of the partially bent second bending portion (1440) within the third state.

[0259] For example, the second bending portion (1440) may include a first portion (1441), a second portion (1442), and a third portion (1443) within the third state. For example, the first portion (1441) may be a portion of the second bending portion (1440) supported by the second support plate (1420). For example, the second portion (1442) may be a portion of the second bending portion (1440) positioned between the first portion (1441) and an area (1450) of the flexible display (271) disposed on the third housing part (230). The second portion (1442) may be at least partially bent within the third state. For example, the third portion (1443) may be a portion of the second bending portion (1440) positioned between the first portion (1441) and the area (1470) of the flexible display (271) disposed on the second housing part (220). The third portion (1443) may be at least partially bent within the third state. For example, within the first state, the first portion (1441), the second portion (1442), and the third portion (1443) may be arranged substantially flat and thus may not be distinguished.

[0260] For example, within the third state, the first portion (1441) may be substantially flat. For example, the first portion (1441) may be flat because it is supported by the second support plate (1420). For example, within the third state, the distance between the area (1450) of the flexible display (271) disposed on the third housing part (230) and the area (1470) of the flexible display (271) disposed on the second housing part (220) may be greater than the thickness of the first housing part (210). For example, within the third state, the width of the first portion (1441) supported by the second support plate (1420) may be less than the thickness of the first housing part (210) positioned between the third housing part (230) and the second housing part (220). For example, since the first housing part (210) must be positioned in the space between the third housing part (230) and the second housing part (220) formed by the first part (1441), the second part (1442), and the third part (1443), the width of the first part (1441) may be smaller than the thickness of the first housing part (210).

[0261] For example, the second portion (1442) and the third portion (1443) can be bent. For example, within the third state, the third housing part (230) and the second housing part (220) can be arranged substantially perpendicular to the first portion (1441). For example, the area (1450) of the flexible display (271) arranged on the third housing part (230) and the area (1470) of the flexible display (271) arranged on the second housing part (220) can be arranged substantially perpendicular to the first portion (1441). For example, the second portion (1442) positioned between the perpendicular areas (1450) and the first portion (1441) can be bent with a constant curvature. For example, the third portion (1443) positioned between the mutually perpendicular regions (1470) and the first portion (1441) can be bent with a constant curvature. For example, since the first portion (1441) is flattened by the second support plate (1420), the curvature of the second portion (1442) and the curvature of the third portion (1443) can be constant. Since the curvature of the second portion (1442) and the curvature of the third portion (1443) are formed to be constant, a space in which the first housing part (210) can be positioned can be stably formed within the third state.

[0262] Similar to the positional movement of the second support plate (1420) illustrated in FIG. 15A, the first support plate (1410) can be moved in conjunction with the first gear set (320). The first support plate (1410) can be moved in conjunction with the first gear set (320). For example, when the first gear set (320) is operated by the rotation of the third housing part (230) and / or the first housing part (210), the first support plate (1410) can be moved in conjunction with the first gear set (320). For example, the position of the first support plate (1410) can be different depending on the rotational angles of the third housing part (230) and the first housing part (210).

[0263] Referring to FIG. 15b, the upper surface (e.g., the surface facing the +z direction) (1410a) of the second support plate (1420) may form substantially the same plane as the upper surface of the second hinge assembly (252). For example, the upper surface (410a) of the first rotation member (410), the upper surface (440a) of the second rotation member (440), and the upper surface (1410a) of the second support plate (1420) may form substantially the same plane.

[0264] For example, a flexible display (e.g., the flexible display (271) of FIG. 15A) may be placed on the second hinge assembly (252) and the second hinge plate (e.g., in the +z direction). If the upper surface (1420a) of the second support plate (1420) and the upper surface of the second hinge assembly (252) (e.g., the upper surface (410a) of the first rotation member (410), the upper surface (440a) of the second rotation member (440)) are positioned at different heights, the surface of the flexible display (271) may become uneven, thereby causing a deterioration in the quality of the screen displayed on the flexible display (271). Since the upper surface of the second support plate (1420) and the upper surface of the second hinge assembly (252) form substantially the same plane, the surface of the flexible display (271) can be maintained uniform.

[0265] Referring to FIG. 15c, a foldable electronic device (101) according to one embodiment may include two first hinge assemblies (251a, 251b). For example, the two first hinge assemblies (251a, 251b) may be symmetrically arranged between the first housing part (210) and the third housing part (230). For example, the two first hinge assemblies (251a, 251b) may be symmetrically arranged with respect to the x-axis. For example, the two first hinge assemblies (251a, 251b) may be spaced apart from each other along an extension direction of the first folding axis (241) (e.g., the y-axis direction).

[0266] A foldable electronic device according to one embodiment (e.g., the foldable electronic device (101) of FIG. 3A) may include a first support plate (1410). For example, the first support plate (1410) may be positioned between two first hinge assemblies (251a, 251b). For example, the first support plate (1410) may be coupled to a first hinge cover (311).

[0267] For example, the first support plate (1410) may support a portion of the flexible display (271) in the first state. For example, the flexible display (271) may include a first region (e.g., a first bending portion (1430) in FIG. 14C) that is folded or unfolded by the first housing part (210) and the third housing part (230). The first bending portion (1430) may be flat in the first state and bent in the second state or the third state. For example, the first bending portion (1430) may be disposed on the first hinge assembly (251) (e.g., in the +z direction). For example, the first support plate (1410) may be disposed on the first hinge assembly (251) in the first state and support the flat first bending portion (1430). For example, the first support plate (1410) may at least partially contact the first bending portion (1430) within the first state. For example, the first support plate (1410) may reduce damage to the first bending portion (1430) within the first state by supporting the first bending portion (1430) and may improve the quality of the screen displayed on the first bending portion (1430).

[0268] Referring to FIG. 15c, a first support plate (1410) disposed between two first hinge assemblies (251a, 251b) and a second support plate (1420) disposed between two second hinge assemblies (252a, 252b) may have different sizes. For example, a width (1520) of the second support plate (1420) may be wider than a width (1510) of the first support plate (1410). For example, a length (1540) of the second support plate (1420) may be different from a length (1530) of the first support plate (1410). For example, a length (1540) of the second support plate (1420) may be longer than a length (1530) of the first support plate (1410), but is not limited thereto.

[0269] For example, the second support plate (1420) may include a first sub-support plate (1420-1) and a second sub-support plate (1420-2). For example, the first sub-support plate (1420-1) and the second sub-support plate (1420-2) may be configured to move in conjunction with the second gear set (330). For example, the first sub-support plate (1420-1) and the second sub-support plate (1420-2) may support the second bending portion (1440) by forming substantially the same plane. For example, the first sub-support plate (1420-1) and the second sub-support plate (1420-2) may support the second bending portion (1440) by moving in the same direction in conjunction with the second gear set (330).

[0270] FIG. 16A is a diagram for comparing a foldable electronic device including a second support plate with a foldable electronic device not including a second support plate. FIGS. 16B and 16C illustrate a portion of a foldable electronic device including a second support plate.

[0271] For example, 1601 of FIG. 16A schematically illustrates a foldable electronic device (101) including a second support plate (1420). For example, since the second support plate (1420) supports a second bending portion (1440), the second bending portion (1440) may include a second portion (1442) and a third portion (1443) having relatively small curvatures. By the second portion (1442) and the third portion (1443) having relatively small curvatures, the second bending portion (1440) may provide a space in which the first housing part (210) can be positioned between the second housing part (220) and the third housing part (230). For example, the width of the first portion (1441) supported by the second support plate (1420) may be smaller than the thickness of the first housing part (210). For example, since a space in which the first housing part (210) can be positioned can be formed, the thickness of the foldable housing (200) can be secured. For example, when the thickness of the foldable housing (200) is limited, the size of electronic components (e.g., a battery) placed within the foldable housing (200) can be limited. For example, since a space in which the first housing part (210) can be positioned can be provided by the second support plate (1420), the thickness of the foldable housing (200) and the size of the electronic components can be secured. For example, since the gap between the flexible display (271) and the foldable housing (200) can be reduced by the second part (1442) and the third part (1443) having relatively small curvatures, the inflow of foreign substances from the outside can be reduced.

[0272] For example, 1602 of FIG. 16A schematically illustrates a foldable electronic device without a second support plate (1420). For example, since the second bending portion (1440) is not supported by the second support plate (1420), the second bending portion (1440) may protrude toward the second hinge assembly (252). Since the second bending portion (1440) protrudes toward the second hinge assembly (252), friction may occur between components of the second hinge assembly (252) and the second bending portion (1440), which may result in damage to the flexible display (271).

[0273] For example, 1603 of FIG. 16A schematically illustrates a foldable electronic device without a second support plate (1420). For example, in the absence of the second support plate (1420), the second bending portion (1440) may be bent with a relatively large curvature. The second bending portion (1440) with a relatively large curvature may cause interference between the first housing part (210) and the flexible display (271), thereby causing damage to the flexible display (271). The relatively large second bending portion (1440) may cause foreign substances to enter the gap (g) between the flexible display (271) and the foldable housing (200).

[0274] Referring to FIG. 16B, in the case of an electronic device (101) without a second support plate (1420), in the third state where the second housing part (220) and the third housing part (230) are folded, the second bending portion (1440) may protrude toward the second hinge cover (312). As described above, as the second bending portion (1440) protrudes, damage to the flexible display (271) may occur due to interference between the second hinge assembly (252) and the second bending portion (1440). As the second bending portion (1440) protrudes, damage to the flexible display (271) may occur because the curvature of the second bending portion (1440) is relatively large.

[0275] Referring to FIG. 16C, in the case of a foldable electronic device (101) including a second support plate (1420), in a third state in which the second housing part (220) and the third housing part (230) are folded (e.g., a folded state of the foldable electronic device (101)), the second bending portion (1440) may be supported by the second support plate (1420). In the third state, the second bending portion (1440) may not protrude by the second support plate (1420) and may form a relatively small curvature. As described above, since the second bending portion (1440) is supported by the second support plate (1420), interference between the second hinge assembly (252) and the second bending portion (1440) may be reduced. As the curvature of the second bending portion (1440) is reduced, damage to the flexible display (271) can be reduced.

[0276] FIG. 17 illustrates a process of transforming a foldable electronic device from an unfolded state to a folded state according to one embodiment.

[0277] Referring to FIG. 17, the foldable housing (1701) (e.g., the foldable housing (200) of FIG. 2) may be configured to provide a first state, a second state, and a third state. The first state may be referred to as an unfolded state of the foldable electronic device (101). The third state may be referred to as a folded state of the foldable electronic device (101). The second state may be referred to as an intermediate state between the first state and the second state.

[0278] State (1700a) of Fig. 17 represents a first state. Within the first state, a first housing part (1710) (e.g., corresponding to the second housing part (220) of Fig. 2), a second housing part (1720) (e.g., corresponding to the third housing part (230) of Fig. 2), and a third housing part (1730) (e.g., corresponding to the first housing part (210) of Fig. 2) may be arranged on substantially the same plane. For example, within the first state, a first angle between the first display area (1761) and the second display area (1762) and a second angle between the second display area (1762) and the third display area (1763) may be substantially straight angles (e.g., approximately 180 degrees). The first state may be referred to as an open state, a flat state, and / or an outspread state, in that the first housing part (1710), the second housing part (1720), and the third housing part (1730) are fully unfolded. Within the first state, the flexible display (1760) (e.g., the flexible display (271) of FIG. 2 ) may be substantially flat.

[0279] State (1700b) of FIG. 17 represents a second state. Within the second state, the first angle may be substantially parallel, and the second angle may be substantially 0 degrees. For example, as the third housing part (1730) rotates relative to the second housing part (1720), the foldable electronic device (101) may change from the first state to the second state. For example, when a user applies an external force to fold the third housing part (1730), the third housing part (1730) may be rotated counterclockwise relative to the first housing part (1710) via the second hinge assembly (1750) (e.g., corresponding to the first hinge assembly (251) of FIG. 3b). The second hinge assembly (1750) can rotatably connect the second housing part (1720) and the third housing part (1730) such that the third housing part (1730) is folded inward with respect to the second housing part (1720). The second state may be referred to as a semi-fold state, a sub-unfolded state (or sub-folded state), a first folded state, an intermediate state, and / or a concave state from the perspective of a portion of the foldable housing (1701) being folded.

[0280] State (1700c) of FIG. 17 represents a third state. Within the third state, the first angle and the second angle may be substantially 0 degrees. For example, within the second state, as the first housing part (1710) rotates relative to the second housing part (1720), the foldable electronic device (101) may change from the second state to the third state. For example, when a user applies an external force to fold the first housing part (1710), the first housing part (1710) may rotate clockwise relative to the second housing part (1720) via the first hinge assembly (1740) (e.g., corresponding to the second hinge assembly (252) of FIG. 3b). The first hinge assembly (1740) can rotatably connect the first housing part (1710) and the second housing part (1720) such that the first housing part (1710) is folded inward relative to the second housing part (1720). The third state may be referred to as a second folded state, a folded state, and / or a closed state from the perspective that the foldable housing (1701) is completely folded. For example, the second folded state may be formed by folding the first housing part (1710) in the first folded state.

[0281] According to one embodiment, the foldable housing (1701) may be referred to as an in-fold structure in that the first housing part (1710) and the third housing part (1730) are folded inward. For example, the first folded state and the second folded state may be states in which the foldable housing (1701) is folded inward with respect to the flexible display (1760). Within the folded third state of the foldable housing (1701), the third housing part (1730) may be positioned between the first housing part (1710) and the second housing part (1720). For example, referring to the state (1700c) of FIG. 17, the first housing part (1710), the third housing part (1730), and the second housing part (1720) may be sequentially positioned in a direction from top to bottom (e.g., the -z direction).

[0282] The foldable electronic device (101) can be used in a first state to utilize a large-screen flexible display (1760). The foldable electronic device (101) can be converted from the first state to a third state so that it can be easily carried by a user. For example, the foldable housing (1701) can be converted from the first state to the second state and then to the third state. For example, in the first state, the third housing part (1730) can first be folded inwardly relative to the second housing part (1720) (second state), and then the first housing part (1710) can be folded inwardly relative to the second housing part (1720) (third state).

[0283] For example, in order to provide the third state, the first hinge assembly (1740) and the second hinge assembly (1750) may be different from each other. If the size of the first hinge assembly (1740) is substantially the same as or similar to the size of the second hinge assembly (1750), when the first housing part (1710) and the second housing part (1720) are folded, a space for the third housing part (1730) to be positioned may not be formed. In the third state, in order to provide a space for the third housing part (1730) to be positioned between the first housing part (1710) and the second housing part (1720), the size of the first hinge assembly (1740) may be larger than the size of the second hinge assembly (1750). The size of the first hinge assembly (1740) may be larger than the size of the second hinge assembly (1750). Due to the difference in size, the size of the first hinge cover (1771) (e.g., the second hinge cover (312) of FIG. 3B) may be different from the size of the second hinge cover (1772) (e.g., the first hinge cover (311) of FIG. 3B). For example, the width of the first hinge cover (1771) (e.g., the fourth width (W4)) may be wider than the width of the second hinge cover (1772) (e.g., the fifth width (W5) of FIG. 3B). In view of having different widths, the first hinge assembly (1740) may be referred to as a wide hinge, and the second hinge assembly (1750) may be referred to as a narrow hinge.

[0284] As described above, the foldable electronic device (101) according to one embodiment may include a foldable housing (1701) that folds inwardly. The foldable housing (1701) in an unfolded state may be folded in such a manner that the third housing part (1730) is first folded inwardly with respect to the second housing part (1720), and then the first housing part (1710) is folded inwardly with respect to the second housing part (1720). In the third state, in order for the third housing part (1730) to be positioned between the first housing part (1710) and the second housing part (1720), a space may be required between the first housing part (1710) and the second housing part (1720) in which the third housing part (1730) can be positioned.

[0285] FIG. 18 is a cross-sectional view of a foldable electronic device according to one embodiment.

[0286] Referring to FIG. 18, the flexible display (1760) may include portions that are partially curved within the folded state of the foldable electronic device (101). Partial bending of the flexible display (1760) may be referred to as a portion of the flexible display (1760) being deformed and a remaining portion of the flexible display (1760) not being deformed.

[0287] According to one embodiment, as the foldable electronic device (101) changes from an unfolded state to a folded state, the flexible display (1760) may be divided into a deformed area (1801) that may be deformed and an undeformed area (1802) that is not deformed. The deformed area (1801) and the undeformed area (1802) may be divided based on whether the shape of the flexible display (1760) is deformed depending on the state of the foldable housing (1701).

[0288] The deformation region (1801) may be referred to as a region of the flexible display (1760) that is deformable as the foldable housing (1701) is folded or unfolded. For example, the flexible display (1760) may include a structure (e.g., a lattice structure) that enables the deformation region (1801) to be deformed as the foldable housing (1701) is folded or unfolded. The deformation region (1801) may be at least partially bendable by the foldable housing (1701) and / or a hinge assembly (e.g., a first hinge assembly (1740), a second hinge assembly (1750)).

[0289] The deformation region (1801) being at least partially curved may be referred to as a portion of the deformation region (1801) forming a curved surface having a curvature, and another portion of the deformation region (1801) forming a flat plane. For example, in a folded state of the foldable electronic device (101), a portion of the deformation region (1801) may form a curved surface having a curvature, and another portion of the deformation region (1801) may form a flat plane. The deformation region (1801) may be a portion of the flexible display (1760) that is deformed by the folding operation of the foldable housing (1701), by including the boundary between the first display region (e.g., the first display region (1761) of FIG. 17) and the second display region (e.g., the second display region (1762) of FIG. 17) or the boundary between the second display region (1762) and the third display region (e.g., the third display region (1763) of FIG. 17).

[0290] The non-deformable region (1802) may be referred to as the remaining region of the flexible display (1760) that is different from the deformable region (1801). The non-deformable region (1802) may be attached to the foldable housing (1701) and maintain a fixed shape. The non-deformable region (1802) may be substantially flat, independent of the state of the foldable electronic device (101). For example, in the unfolded state, the folded state, and / or the intermediate state of the foldable electronic device (101), the non-deformable region (1802) may be substantially flat without being bent.

[0291] According to one embodiment, the deformation region (1801) may include a first deformation region (1810) and a second deformation region (1820). The first deformation region (1810) may correspond to the first bending portion (1430) of FIG. 14C. The second deformation region (1820) may correspond to the second bending portion (1440) of FIG. 14C. In the folded state of the foldable electronic device (101), the first deformation region (1810) and the second deformation region (1820) may be formed by folding a portion of the flexible display (1760). For example, the first deformation region (1810) may be formed between the first display region (1761) and the second display region (1762). A portion of the first deformation region (1810) may be formed by partially deforming the first display region (1761), and a remaining portion of the first deformation region (1810) may be formed by partially deforming the second display region (1762). For example, the second deformation region (1820) may be formed between the second display region (1762) and the third display region (1763). A portion of the second deformation region (1820) may be formed by partially deforming the second display region (1762), and a remaining portion of the second deformation region (1820) may be formed by partially deforming the third display region (1763).

[0292] For example, the non-deformable region (1802) different from the first deformation region (1810) and the second deformation region (1820) may be divided into a first region (1830), a second region (1840), and a third region (1850). For example, the first region (1830) may be a non-deformable region within the first display region (1761) and may be in contact with the first deformation region (1810). For example, the second region (1840) may be a non-deformable region within the second display region (1762) and may be located between the first deformation region (1810) and the second deformation region (1820). For example, the third region (1850) may be a non-deformable region within the third display region (1763) and may be in contact with the second deformation region (1820). For example, within the folded state of the foldable electronic device (101), a first deformation region (1810) may be positioned between a first region (1830) and a second region (1840), and a second deformation region (1820) may be positioned between a second region (1840) and a third region (1850).

[0293] When the foldable electronic device (101) changes from an unfolded state to a folded state, since the third housing part (1730) is folded inward first, within the folded state of the foldable electronic device (101), the first region (1830) can face the back surface (1733) of the third housing part (1730). After the third housing part (1730) is folded, since the third housing part (1730) is folded inward, the back surface (1733) of the third housing part (1730) can be referred to as the surface of the third housing part (1730) opposite the front surface where the third display area (1763) is arranged. According to one embodiment, within the folded state of the foldable electronic device (101), the second region (1840) can face the third region (1850).

[0294] Since the first region (1830) faces the back surface (1733) of the third housing part (1730) and the second region (1840) faces the third region (1850), the spacing between the regions (1830, 1840, 1850) within the folded state of the foldable electronic device (101) may be different. According to one embodiment, within the folded state, the spacing between the first region (1830) and the third region (1850) may be greater than the spacing between the second region (1840) and the third region (1850).

[0295] Since the third housing part (1730) is positioned between the first region (1830) and the third region (1850), the gap between the first region (1830) and the third region (1850) can be designed to be a certain gap or more so that the third housing part (1730) can be positioned between the first housing part (1710) and the second housing part (1720). According to one embodiment, the gap between the first region (1830) and the third region (1850) can be greater than the thickness of the third housing part (1730).

[0296] For example, if the gap is smaller than or equal to the thickness of the third housing part (1730), when the third housing part (1730) is first folded (e.g., the state (1700b) of FIG. 17), when the first housing part (1710) is folded inward, the first housing part (1710) may not be completely folded, or damage to the flexible display (1760) may occur. By forming the gap larger than the thickness of the third housing part (1730), the first housing part (1710) may be completely folded, and the third housing part (1730) may be positioned between the first housing part (1710) and the second housing part (1720) in the folded state of the foldable electronic device (101). For example, when the foldable electronic device (101) includes a frame, the distance between the first region (1830) and the third region (1850) may be greater than the sum of the thickness of the third housing part (1730) and the thickness of the frame.

[0297] In the folded state of the foldable electronic device (101), the width of the first deformation region (1810) may be greater than the thickness of the third housing part (1730) so that the third housing part (1730) is positioned between the first housing part (1710) and the second housing part (1720). For example, if the width of the first deformation region (1810) is less than the thickness of the third housing part (1730), the foldable housing (1701) may not be completely folded.

[0298] FIG. 19 illustrates a flexible display, a first hinge assembly, and a second hinge assembly in a folded state.

[0299] Referring to FIG. 19, within a folded state of a foldable housing (e.g., the foldable housing (1701) of FIG. 17), a flexible display (1760) may be divided into a deformation region (1801) and a non-deformable region (1802). As described above, the deformation region (1801) and the non-deformable region (1802) may be divided based on whether or not the shape is deformed. For example, the deformation region (1801) may be a region of the flexible display (1760) that is at least partially bent as the foldable electronic device (101) changes from an unfolded state to a folded state. For example, the non-deformable region (1802) may be a region of the flexible display (1760) that is substantially flat, independent of the state of the foldable housing (1701). For example, the deformation region (1801) may include a first deformation region (1810) and a second deformation region (1820). For example, the non-deformable region (1802) may include a first region (1830), a second region (1840), and a third region (1850).

[0300] For example, the first deformation region (1810) may be formed by a first hinge assembly (1740). According to one embodiment, the first hinge assembly (1740) may include first hinge plates (e.g., a first plate (1741) and a second plate (1742)) and a first hinge bracket (1743). Each of the first plate (1741) and the second plate (1742) may be rotatably connected to the first hinge bracket (1743). The first plate (1741) may be coupled to the first housing part (1710). The second plate (1742) may be coupled to the second housing part (1720). For example, when an external force that causes the rotation of the first housing part (1710) is applied, the first plate (1741) and the second plate (1742) may be rotated by the external force. Although not shown, the first hinge assembly (1740) may include gears (e.g., the second gear set (330) of FIG. 7B) that link the rotational motions of the first plate (1741) and the second plate (1742). For example, as the first plate (1741) rotates, a portion of the first display area (1761) may be bent, and as the second plate (1742) rotates, a portion of the second display area (1762) may be bent. A first deformation area (1810) may be formed by a portion of the first display area (1761) and a portion of the second display area (1762). The first deformation region (1810) can be bent by the first hinge plates (e.g., the first plate (1741) and the second plate (1742)).

[0301] For example, the second deformation region (1820) may be formed by a second hinge assembly (1750). In one embodiment, the second hinge assembly (1750) may include second hinge plates (e.g., a third plate (1751) and a fourth plate (1752)) and a second hinge bracket (1753). Each of the third plate (1751) and the fourth plate (1752) may be rotatably connected to the second hinge bracket (1753). The third plate (1751) may be coupled to the second housing part (1720). The fourth plate (1752) may be coupled to the third housing part (1730). For example, when an external force causing rotation of the third housing part (1730) is applied, the third plate (1751) and the fourth plate (1752) may be rotated by the external force. For example, as the third plate (1751) rotates, another part of the second display area (1762) may be bent, and as the fourth plate (1752) rotates, a part of the third display area (1763) may be bent. A second deformation area (1820) may be formed by another part of the second display area (1762) and a part of the third display area (1763). The second deformation area (1820) may be bent by the second plates (e.g., the third plate (1751) and the fourth plate (1752)).

[0302] Since the first deformation region (1810) is deformed (e.g., bent) by the first hinge assembly (1740), the shape of the first deformation region (1810) can be determined based on the state of the first hinge assembly (1740) in the folded state. According to one embodiment, the first deformation region (1810) can include a first bent portion (1812), a second bent portion (1813), and a first flat portion (1811). The first flat portion (1811) can correspond to the flat portion (1441) of FIG. 15A. The first bent portion (1812) and the second bent portion (1813) can correspond to the bent portions (1442, 1443) of FIG. 15A.

[0303] For example, the first curved portion (1812) may be formed by partially bending the first display area (1761). For example, the first curved portion (1812) may be a portion that is bent to have a curvature (e.g., a first maximum curvature) within a portion of the first display area (1761) that is bent by the first plate (1741).

[0304] For example, the second curved portion (1813) may be formed by partially bending the second display area (1762). For example, the second curved portion (1813) may be a portion that is bent to have a curvature (e.g., a second maximum curvature) within a portion of the second display area (1762) that is bent by the second plate (1742). In one embodiment, the first maximum curvature of the first curved portion (1812) may correspond to the second maximum curvature of the second curved portion (1813). Within the present disclosure, the “maximum curvature” may be referred to as the curvature at a point having the greatest curvature among the curvatures within the curved portion (e.g., the first curved portion (1812), the second curved portion (1813), and / or the third curved portion (423)). For example, when the curved portion is bent to have a constant curvature, the curvature within the curved portion may be substantially equal to the maximum curvature. For example, if a curved portion is bent to have a non-constant curvature, a point with maximum curvature may be formed within the curved portion.

[0305] For example, the first bending portion (1812) and the second bending portion (1813) can be formed by the rotational motion of the first plate (1741) and the second plate (1742). Since the rotational motion of the first plate (1741) and the rotational motion of the second plate (1742) are linked by gears, the first bending portion (1812) and the second bending portion (1813) can be formed in substantially the same shape.

[0306] According to one embodiment, the first maximum curvature of the first curved portion (1812) and the second maximum curvature of the second curved portion (1813) of the flexible display (1760) that are deformed may be set in consideration of the marketability of the flexible display (1760). For example, when the first maximum curvature and the second maximum curvature increase, the overall width of the flexible display (1760) may decrease. When the overall width of the flexible display (1760) decreases, the size of the display area for providing visual information may decrease. In order to provide a large screen using a compact foldable housing (1701), the first curved portion (1812) and the second curved portion (1813) may have a maximum curvature that is less than or equal to about 1.5R. For example, the first maximum curvature and / or the second maximum curvature may be less than or equal to about 1.5R. For example, the first maximum curvature and the second maximum curvature may be equal to or similar to the limit curvature of the flexible display (1760).

[0307] For example, the first flat portion (1811) may be positioned between the first curved portion (1812) and the second curved portion (1813). In one embodiment, the first flat portion (1811) may be substantially flat.

[0308] In one embodiment, for a first maximum curvature and a second maximum curvature of less than or equal to about 1.5R, the first flat portion (1811) can be spaced apart from the first region (1830) and the second region (1840) by an inner diameter corresponding to the first maximum curvature and the second maximum curvature. For example, on the boundary between the first flat portion (1811) and the second curved portion (1813), an imaginary line (L) extending in a direction perpendicular to the first flat portion (1811) can be positioned above a surface (1841) (e.g., a front surface) of the second region (1840). As described above, in order for the first maximum curvature and / or the second maximum curvature to be less than or equal to about 1.5R, the distance between the virtual line (L) and the surface (1841) of the second region (1840) may be greater than or equal to about 1.5 mm, which is an inner diameter corresponding to the first maximum curvature and / or the second maximum curvature. If the distance is less than about 1.5 mm, the size of the display area of ​​the flexible display (1760) may be reduced because the first maximum curvature and / or the second maximum curvature becomes greater than about 1.5R. According to one embodiment, since the virtual line (L) is positioned above the surface (1841) of the second region (1840) and the distance is formed to be greater than or equal to about 1.5 mm, the first maximum curvature and / or the second maximum curvature may be less than or equal to about 1.5R.

[0309] According to one embodiment, since the first flat portion (1811) is formed between the first curved portion (1812) and the second curved portion (1813), the length of the first flat portion (1811) may be smaller than the thickness of the third housing part (1730) positioned between the first region (1830) and the third region (1850).

[0310] FIG. 20A is a perspective view of a foldable electronic device according to one embodiment. FIG. 20B illustrates a foldable electronic device according to a comparative example.

[0311] Referring to FIG. 20A, the foldable electronic device (101) may include a key button (1781) and / or a fingerprint recognition unit (1782). The key button (1781) may be used to receive a user input. For example, the foldable electronic device (101) may be in an inactive state. For example, the inactive state may be referred to as a turn-off state in which a power management integrated circuit (PMIC) of the foldable electronic device (101) has stopped providing power and requires booting to transition to an active state. The inactive state may be referred to as an idle state, a standby state, or a low power state. The user may press the key button (1781) to transition the foldable electronic device (101) from the inactive state to the active state. The processor may be configured to transition the foldable electronic device (101) from an inactive state to an active state based on identifying a user input to the key button (1781). For example, as the foldable electronic device (101) transitions from an inactive state to an active state, the cover display (1784) (e.g., the cover display (272) of FIG. 2 ) may be configured to display visual information. In addition, the key button (1781) may be used to receive a designated user input. For example, the key button (1781) may be used to receive a user input for adjusting the volume of an audio signal output from a speaker.

[0312] The fingerprint recognition unit (1782) may be used to identify a designated user of the foldable electronic device (101). When a user places a finger on the fingerprint recognition unit (1782), the fingerprint recognition unit (1782) may provide data representing a fingerprint pattern to a processor (e.g., the processor (120) of FIG. 1). The processor may be configured to identify whether a first pattern of a fingerprint identified through the data corresponds to a second pattern of a fingerprint registered in a memory. According to one embodiment, the fingerprint recognition unit (1782) may utilize a key button (1781). For example, the processor may be configured to identify whether a first pattern of a fingerprint identified through the key button (1781) corresponds to a second pattern of a fingerprint registered in the memory. The processor may be configured to perform an operation (e.g., unlocking) that allows use of the foldable electronic device (101) based on identifying the first pattern corresponding to the second pattern.

[0313] The foldable electronic device (101) can be used in a folded state. For example, the foldable electronic device (101) can provide visual information (e.g., images and / or videos) through the cover display (1784) in the folded state. For example, the foldable electronic device (101) can be configured to control a speaker to emit an audio signal in the folded state.

[0314] In one embodiment, a key button (1781) and / or a fingerprint recognition unit (1782) may be positioned so that a user can use the key button (1781) and / or the fingerprint recognition unit (1782) within the folded state. For example, the key button (1781) may be positioned on an outer side of the foldable housing (1701) in the folded state so that a user can press the key button (1781) within the folded state. In one embodiment, the key button (1781) and / or the fingerprint recognition unit (1782) may be positioned on a side of the first housing part (1710) opposite the first hinge assembly (1740) (e.g., the second side (1712) of FIG. 21 ). For example, a part of the key button (1781) and / or the fingerprint recognition unit (1782) may be exposed to the one side (1712) of the first housing part (1710), so that the user can use the key button (1781) and / or the fingerprint recognition unit (1782) in the folded state. For example, in the folded state, the key button (1781) and / or the fingerprint recognition unit (1782) may be positioned above the second hinge cover (1772).

[0315] An electronic device (1001) according to a comparative example illustrated in FIG. 20b represents an electronic device in which a key button (1781) and / or a fingerprint recognition unit (1782) are disposed on one side (1732) of a third housing part (1730). Referring to FIG. 20b, when the key button (1781) and / or the fingerprint recognition unit (1782) are disposed on one side (e.g., the fifth side (1731) of FIG. 21) of the third housing part (1730), in an unfolded state (2000a) of the foldable electronic device (101), the key button (1781) and / or the fingerprint recognition unit (1782) may be exposed to the outside of the foldable electronic device (101). In the intermediate state (2000b) in which the third housing part (1730) is folded relative to the second housing part (1720), the key button (1781) and / or the fingerprint recognition unit (1782) may be exposed to the outside of the foldable electronic device (101). When the foldable electronic device (101) is in the folded state (2000c), the third housing part (1730) is positioned between the first housing part (1710) and the second housing part (1720), so that one side (1732) of the third housing part (1730) is not exposed to the outside of the foldable electronic device (101) but may be covered by the first hinge cover (1771). Since one side (1732) of the third housing part (1730) is covered, the key button (1781) and / or the fingerprint recognition unit (1782) may not be used.

[0316] According to one embodiment, the key button (1781) and / or the fingerprint recognition unit (1782) may be positioned on one side (1712) of the first housing part (1710) so that the key button (1781) and / or the fingerprint recognition unit (1782) can be used not only in the unfolded state, the intermediate state, but also in the folded state.

[0317] FIG. 21 illustrates a foldable electronic device according to one embodiment in a folded state.

[0318] Referring to FIG. 21, within the folded state, the first housing part (1710), the second housing part (1720), and the third housing part (1730) may overlap each other. For example, the third housing part (1730) may be positioned between the first housing part (1710) and the second housing part (1720). A space may be formed between the first housing part (1710) and the second housing part (1720) within the folded state so that the third housing part (1730) may be positioned between the first housing part (1710) and the second housing part (1720).

[0319] Within the folded state of the foldable electronic device (101), the first hinge cover (1771) may face the second hinge cover (1772) with the foldable housing (1701) interposed therebetween. For example, the first hinge cover (1771) may be disposed on one side (e.g., in the -x direction) of the foldable housing (1701), and the second hinge cover (1772) may be disposed on the other side (e.g., in the +x direction) of the foldable housing (1701). The first hinge cover (1771) may be opposite to the second hinge cover (1772). The first housing part (1710) and the second housing part (1720) may partially surround the first hinge cover (1771). For example, the first housing part (1710) and the second housing part (1720) can rotate outside the first hinge cover (1771) when unfolded or folded. The second housing part (1720) and the third housing part (1730) can partially surround the second hinge cover (1772). For example, the second housing part (1720) and the third housing part (1730) can rotate outside the second hinge cover (1772) when unfolded or folded.

[0320] As illustrated in FIG. 21, the first hinge cover (1771) and the second hinge cover (1772) can protrude from the foldable housing (1701) in a folded state.

[0321] For example, the first housing part (1710) may, in a folded state, include a first side (1711) adjacent to the first hinge cover (1771) and a second side (1712) opposite the first side (1711). At least one key button (1781) and / or a fingerprint recognition unit (1782) may be exposed to the outside of the foldable housing (1701) through the second side (1712). The second housing part (1720) may, in a folded state, include a third side (1721) adjacent to the first hinge cover (1771) and a fourth side (1722) opposite the third side (1721). The fourth side (1722) may be adjacent to the second hinge cover (1772). The third housing part (1730) may include, in a folded state, a fifth side (1731) facing the first hinge cover (1771) and a sixth side (1732) opposite the fifth side (1731). The sixth side (1732) may be adjacent to the second hinge cover (1772).

[0322] For example, the first hinge cover (1771) may protrude from the first side (1711) and the third side (1721). For example, the first side (1711) and the third side (1721) may be substantially aligned within the folded state. The first side (1711) and the third side (1721) being substantially aligned may be referred to as being positioned on the same line (L1) within the folded state. The portion of the first hinge cover (1771) that protrudes from the first side (1711) and the third side (1721) may protrude by about 2.0 mm to about 2.5 mm. For example, the distance (e.g., first distance (2101)) from the outer surface (1771a) of the first hinge cover (1771) to the first side (1711) (or third side (1721)) may be about 2.3 mm, but is not limited thereto.

[0323] For example, the outer surface (1772a) of the second hinge cover (1772) may protrude from the fourth side (1722) and the sixth side (1732). For example, the fourth side (1722) and the sixth side (1732) may be substantially aligned within the folded state. The fourth side (1722) and the sixth side (1732) being substantially aligned may be referred to as the fourth side (1722) and the sixth side (1732) being positioned on the same line (L2) within the folded state. The portion of the second hinge cover (1772) that protrudes from the fourth side (1722) and the sixth side (1732) may protrude by about 1.5 mm to about 2.0 mm. For example, the distance (e.g., second distance (2102)) from the outer surface (1772a) of the second hinge cover (1772) to the fourth side (1722) (or sixth side (1732)) may be about 1.7 mm, but is not limited thereto.

[0324] The first distance (2101) and the second distance (2102) may be different depending on the structure of the foldable electronic device (101). For example, the first distance (2101) and the second distance (2102) may vary depending on the design of the first hinge assembly (1740) and the second hinge assembly (1750) and the thickness of the foldable housing (1701). The first distance (2101) and the second distance (2102) may be greater than zero. The first distance (2101) and the second distance (2102) may be smaller than the first thickness (T1) of the first housing part (1710), the second thickness (T2) of the second housing part (1720), and the third thickness (T3) of the third housing part (1730).

[0325] According to one embodiment, the widths of the first housing part (1710), the second housing part (1720), and the third housing part (1730) may be different from each other. Within the present disclosure, the width may be referred to as the length in the direction perpendicular to the rotational axis of the foldable housing (1701). The first housing part (1710) may have a first width (W1). The second housing part (1720) may have a second width (W2). The third housing part (1730) may have a third width (W3).

[0326] According to one embodiment, in the folded state, when the third housing part (1730) is positioned between the first housing part (1710) and the second housing part (1720), the third width (W3) may be narrower than the first width (W1) and the second width (W2) so that the third housing part (1730) does not interfere with the flexible display (1760). Because the third width (W3) is narrower than the first width (W1) and the second width (W2), in the folded state, the fifth side (1731) may not be aligned with the third side (1721) and the first side (1711). The fifth side (1731) may be spaced apart from an imaginary line (L1) connecting the first side (1711) and the third side (1721) toward the second hinge cover (1772) (e.g., in the +x direction).

[0327] In one embodiment, the first width (W1) may be wider than the second width (W2) and the third width (W3). In the folded state, the second side (1712) of the first housing part (1710) may be substantially aligned with the outer surface (1772a) of the second hinge cover (1772). The substantial alignment of the first side (1711) and the outer surface (1772a) of the second hinge cover (1772) may be referred to as the first side (1711) and the outer surface (1772a) of the second hinge cover (1772) being positioned on the same line (L3) in the folded state. If the second side (1712) is not substantially aligned with the outer surface (1772a) of the second hinge cover (1772) and is positioned outward (e.g., in the +x direction) from the outer surface (1772a) of the second hinge cover (1772), the first housing part (1710) may be easily damaged by impact because the first housing part (1710) protrudes outward. By substantially aligning the second side (1712) with the outer surface (1772a) of the second hinge cover (1772), the foldable housing (1701) may be compact in a folded state. At least one key button (1781) and / or fingerprint recognition unit (1782) exposed through the second side (1712) may protrude from the line (L3) so that a user can easily press the at least one key button (1781) and / or fingerprint recognition unit (1782).

[0328] For example, since the first side (1711) and the third side (1721) are substantially aligned, the second width (W2) may correspond to a value obtained by subtracting the second distance (2102) from the first width (W1). For example, when the first width (W1) is about 67.2 mm and the second distance (2102) is about 1.7 mm, the second width (W2) may be about 65.5 mm (67.2 mm - 1.7 mm), but is not limited thereto.

[0329] For example, the foldable electronic device (101) may include a cap (2120) to reduce the inflow of foreign substances. The cap (2120) may be positioned close to the fifth side (1731) of the third housing part (1730) in the folded state. In the folded state, the fifth side (1731) of the third housing part (1730) may be spaced apart from the cap (2120) (e.g., the protrusion (2120a)). When the fifth side (1731) comes into contact with the protrusion (2120a) of the cap (2120), the third housing part (1730) may physically collide with the cap (2120) when unfolding or folding, thereby causing damage to the foldable electronic device (101). As the fifth side (1731) is spaced apart from the cap (2120), the damage can be prevented. For example, the fifth side (1731) may be spaced apart from the cap (2120) toward the second hinge cover (1772) (e.g., in the +x direction), such that a gap (2103) may be formed between the fifth side (1731) and the cap (2120). For example, the gap (2103) may be about 3 mm or less (e.g., about 0.75 mm), but is not limited thereto.

[0330] For example, since the fourth side (1722) and the sixth side (1732) are substantially aligned, the third width (W3) may correspond to the second width (W2) minus the height of the cap (2120) relative to the imaginary line (L1) and the gap (2103) between the fifth side (1731) and the cap (2120). For example, when the second width (W2) is about 65.5 mm, the height of the cap (2120) is about 2.5 mm, and the gap (2103) is about 0.8 mm, the third width (W3) may be about 62.2 mm (65.5 mm - 2.5 mm - 0.8 mm), but is not limited thereto.

[0331] According to one embodiment, a foldable housing (1701) having an inwardly folding structure can be formed as the first housing part (1710), the second housing part (1720), and the third housing part (1730) each have different widths. As the third housing part (1730) has a structure that allows it to be positioned between the first housing part (1710) and the second housing part (1720), the three housings can be stably folded or unfolded.

[0332] A foldable electronic device (101) is provided. The foldable electronic device (101) may include a housing (200) including a first housing part (210), a second housing part (220), and a third housing part (230). For example, the third housing part (230) may be positioned between the first housing part (210) and the second housing part (220) in an unfolded state of the foldable electronic device (101). The foldable electronic device (101) may include a first hinge assembly (251) including a first gear set (320) for rotatably connecting the first housing part (210) and the third housing part (230) and rotating the third housing part (230) together with the rotation of the first housing part (210). The foldable electronic device (101) may include a second hinge assembly (252) including a second gear set (330) for rotatably connecting the second housing part (220) and the third housing part (230) and rotating the third housing part (230) together with the rotation of the second housing part (220). The number of gears included in the second gear set (330) may be greater than the number of gears included in the first gear set (320) so as to provide a folded state in which the front side of the first housing part (210) faces the front side of the third housing part (230) and the rear side of the first housing part (210) faces the front side of the second housing part (220).

[0333] The first hinge assembly (251) may include a first rotation plate (251-1) rotatably coupled to the first housing part (210), a second rotation plate (251-2) rotatably coupled to the third housing part (230), a first shaft (811) coupled to the first rotation plate (251-1), and a second shaft (812) coupled to the second rotation plate (251-2). The first gear set (320) may include a first gear (701) coupled to the first shaft (811), a second gear (702) coupled to the second shaft (812), a third gear (703) meshed with the first gear (701), and a fourth gear (704) meshed with the second gear (702) and the third gear (703). The second hinge assembly (252) may include a third rotation plate (252-1) coupled to the second housing part (220), a fourth rotation plate (252-2) coupled to the third housing part (230), a third shaft (813) coupled to the third rotation plate (252-1), and a fourth shaft (814) coupled to the fourth rotation plate (252-2). The second gear set (330) may include a fifth gear (705) coupled to the third shaft (813), a sixth gear (706) coupled to the fourth shaft (814), a seventh gear (707) meshed with the fifth gear (705), an eighth gear (708) meshed with the seventh gear (707), a ninth gear (709) meshed with the eighth gear (708), and a tenth gear (710) meshed with the sixth gear (706) and the ninth gear (709).The first hinge assembly (251) may be configured to rotate the third housing part (230) together with the rotation of the first housing part (210), by the rotation of the first shaft (811) according to the rotation of the first housing part (210), the rotation of the first gear (701) according to the rotation of the first shaft (811), the rotation of the third gear (703) according to the rotation of the first gear (701), the rotation of the fourth gear (704) according to the rotation of the third gear (703), the rotation of the second gear (702) according to the rotation of the fourth gear (704), the rotation of the second shaft (812) according to the rotation of the second gear (702), and the rotation of the third housing part (230) according to the rotation of the second shaft (812). The second hinge assembly (252) rotates the third shaft (813) according to the rotation of the second housing part (220), the fifth gear (705) according to the rotation of the third shaft (813), the seventh gear (707) according to the rotation of the fifth gear (705), the eighth gear (708) according to the rotation of the seventh gear (707), the ninth gear (709) according to the rotation of the eighth gear (708), the tenth gear (710) according to the rotation of the ninth gear (709), the sixth gear (706) according to the rotation of the tenth gear (710), the fourth shaft (814) according to the rotation of the sixth gear (706), and the third housing part (230) according to the rotation of the fourth shaft (814). By rotation, the third housing part (230) can be configured to rotate together with the rotation of the second housing part (220).

[0334] The distance between the third shaft (813) and the fourth shaft (814) may be longer than the distance between the first shaft (811) and the second shaft (812).

[0335] The diameter of the third shaft (813) may be larger than the diameter of the first shaft (811).

[0336] The fifth gear (705) can be paired with the sixth gear (706). The seventh gear (707) can be paired with the tenth gear (710). The eighth gear (708) can be paired with the ninth gear (709). For example, the size of the fifth gear (705) can correspond to the size of the sixth gear (706). The size of the seventh gear (707) can correspond to the size of the tenth gear (710). The size of the eighth gear (708) can correspond to the size of the ninth gear (709).

[0337] The size of the seventh gear (707) may be larger than the size of the fifth gear (705). The size of the seventh gear (707) may be smaller than the size of the ninth gear (709).

[0338] The foldable electronic device (101) may further include a flexible display (271) disposed on the first housing part (210), the second housing part (220), and the third housing part (230). In the folded state of the foldable electronic device (101), a distance between a rotation axis (708a) of the eighth gear (708) and a rear side (720) of the flexible display (271) may be longer than a distance between a rotation axis (705a) of the fifth gear (705) and the rear side of the flexible display (271), and shorter than a distance between a rotation axis (707a) of the seventh gear (707) and the rear side of the flexible display (271).

[0339] The foldable electronic device (101) may further include a flexible display (271) disposed on the first housing part (210), the second housing part (220), and the third housing part (230). In the folded state of the foldable electronic device (101), a distance between a rotation axis (701a) of the first gear (701) and a rear side (720) of the flexible display (271) may be shorter than a distance between a rotation axis (703a) of the third gear (703) and the rear side (720) of the flexible display (271).

[0340] The above foldable electronic device (101) may include a flexible display (271) disposed on the first housing part (210), the second housing part (220), and the third housing part (230), and including a first bending portion (1430) that is bent by rotation of the first housing part (210) relative to the third housing part (230) and a second bending portion (1440) that is bent by rotation of the second housing part (220) relative to the third housing part (230). The foldable electronic device (101) may include a first support plate (1410) coupled to the first hinge assembly (251), positioned below the first bending portion (1430) of the flexible display (271), and spaced apart from the first bending portion (1430) of the flexible display (271) in the folded state of the foldable electronic device (101). The foldable electronic device (101) may include a second support plate (1420) coupled to the second hinge assembly (252), positioned below the second bending portion (1440) of the flexible display (271), and in contact with the second bending portion (1440) of the flexible display (271) in the folded state of the foldable electronic device (101). In an unfolded state of the foldable electronic device (101) that is different from the folded state of the foldable electronic device (101), the first bending portion (1430) may be supported by the first support plate (1410). In the unfolded state of the foldable electronic device (101), the second bending portion (1440) may be supported by the second support plate (1420).

[0341] The second support plate (1420) may include a first sub-support plate (1420-1) and a second sub-support plate (1420-2) configured to move based on the rotation of the second gear set (330).

[0342] In the folded state of the foldable electronic device (101), the second bending portion (1440) configured to be in contact with the second support plate (1420) may include a flat portion (1441) that is in contact with the second support plate (1420) so as to be supported by the second support plate (1420), and a curved portion (1442, 1443) that extends from the flat portion (1441) and is spaced apart from the second support plate (1420). In the folded state of the foldable electronic device (101), the flat portion (1441) of the second bending portion (1440) may be supported by the second support plate (1420).

[0343] The width of the flat portion (1441) may be smaller than the thickness of the second housing part (220) positioned between the first housing part (210) and the third housing part (230) in the folded state of the foldable electronic device (101).

[0344] In the unfolded state of the foldable electronic device (101), an area of ​​the flexible display (271) supported by the second support plate (1420) (e.g., the second bending portion (1440)) may be wider than an area of ​​the flexible display (271) supported by the first support plate (1410) (e.g., the first bending portion (1430)).

[0345] The foldable electronic device (101) may include a first hinge cover (311) that at least partially accommodates the first hinge assembly (251). The foldable electronic device (101) may include a second hinge cover (312) that at least partially accommodates the second hinge assembly (252). The width of the second hinge cover (312) may be wider than the width of the first hinge cover (311).

[0346] The first hinge cover (311) may be substantially covered by the first housing part (210) and the third housing part (230) in the folded state. At least a portion of the second hinge cover (312) may be exposed between the second housing part (220) and the third housing part (230) in the folded state.

[0347] The first hinge assembly (251) may include at least one first elastic member (1210). The second hinge assembly (252) may include at least two second elastic members (480). The number of the at least two second elastic members (480) may be greater than the number of the at least one first elastic member (1210).

[0348] The second hinge assembly (252) may include a third rotation plate (252-1) coupled to the second housing part (220), and a fourth rotation plate (252-2) coupled to the third housing part (230). Each of the third rotation plate (252-1) and the fourth rotation plate (252-2) includes a rotary rail (530), a first rotation member (410) coupled to the second housing part (220) or the third housing part (230), a guide groove (540) that guides the rotation of the first rotation member (410) by inserting the rotary rail (530), a guide member (420) coupled to the second housing part (220) or the third housing part (230), a connecting member (430) that includes a slot (920) and is coupled to the first rotation member (410), and a protrusion (910) that is inserted into the slot (920) and moves within the slot (920) to limit the rotation range of the first rotation member (410), and a shaft that is connected to a part of the second gear set (330) is coupled, thereby It may include a second rotating member (440) that transmits the rotational force of the gear set (330) to the first rotating member (410) through the connecting member (430).

[0349] The slot (920) may include a first engaging portion (920a) spaced apart from one end (921a, 922a) of the slot (920) by a specified distance and protruding toward the inside of the slot (920), and a second engaging portion (920b) spaced apart from the other end (921b, 922b) of the slot (920) opposite to the one end by the specified distance and protruding toward the inside of the slot (920).

[0350] For example, the foldable electronic device (101) may further include a flexible display (271) disposed on the foldable housing (200). The foldable electronic device (101) may further include a first support plate (1410) that moves together with the first gear set (320). The foldable electronic device (101) may further include a second support plate (1420) that moves by being linked with the second gear set (330). The first support plate (1410) may support a first bending portion (1430) of the flexible display (271) in the first state. The second support plate (1420) may support a second bending portion (1440) of the flexible display (271) in the first state or the second state. The second bending portion (1440) may be wider than the first bending portion (1430).

[0351] For example, within the third state, the width of the second bending portion (1440) supported by the second support plate (1420) may be smaller than the thickness of the first housing part (210) positioned between the third housing part (230) and the second housing part (220) within the third state.

[0352] For example, the width of the second support plate (1420) may be wider than the width of the first support plate (1410).

[0353] For example, the length of the second support plate (1420) may be different from the length of the first support plate (1410).

[0354] For example, the second bending portion (1440) may include a first portion (1441) that is vertically disposed with the third housing part (230) and the second housing part (220) by being supported by the second support plate (1420) within the third state. The second bending portion (1440) may include a second portion (1442) that is positioned between the first portion (1441) and an area of ​​the flexible display (271) disposed on the third housing part (230) within the third state and is at least partially bent. The second bending portion (1440) may include a third portion (1443) that is positioned between the first portion (1441) and an area of ​​the flexible display (271) disposed on the second housing part (220) within the third state and is at least partially bent. The width of the first part (1441) may be thicker than the thickness of the first housing part (210) positioned between the third housing part (230) and the second housing part (220) within the third state.

[0355] For example, the first hinge assembly (251) may include at least one first elastic member (1210). The second hinge assembly (252) may include at least two second elastic members (480). The number of the at least two second elastic members (480) may be greater than the number of the at least one first elastic member (1210).

[0356] For example, the second hinge assembly (252) may include a rotary rail (530) and a first rotation member (410) coupled to the second housing part (220) and the third housing part (230). The second hinge assembly (252) may include a guide groove (540) into which the rotary rail (530) is inserted to guide the rotation of the first rotation member (410), and a guide member (420) coupled to the second housing part (230) and the third housing part (210). The second hinge assembly (252) may include a slot (920) and a connecting member (430) coupled to the first rotation member (410). The second hinge assembly (252) may include a second rotation member (440). The second rotation member (440) may include a protrusion (910). The protrusion (910) may be inserted into the slot (920). The protrusion (910) may be moved within the slot (920) to limit the rotation range of the first rotation member (410). The second rotation member (440) may be coupled with a shaft that is connected to at least a portion of the second gear set (330), thereby transmitting the rotational force of the second gear set (330) to the first rotation member (410) through the connecting member (430).

[0357] For example, the slot (920) may include a first engaging portion (920a) spaced apart from one end (921a, 922a) of the slot (920) by a specified distance and protruding toward the inside of the slot (920). The slot (920) may include a second engaging portion (920b) spaced apart from the other end (921b, 922b) of the slot (920) opposite to the one end (921a, 922a) by the specified distance and protruding toward the inside of the slot (920).

[0358] For example, the connecting member (430) may include a third elastic member (1230) disposed within the slot (920). The third elastic member (1230) may include a third catch (1231) spaced apart from one end (921a, 922a) of the slot (920) by a specified distance and protruding toward the inside of the slot (920). The third elastic member (1230) may include a fourth catch (1232) spaced apart from the other end (921b, 922b) of the slot (920) opposite to the one end (921a, 922a) by the specified distance and protruding toward the inside of the slot (920).

[0359] Electronic devices according to the various embodiments disclosed in this document may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, electronic devices, or home appliances. Electronic devices according to the embodiments of this document are not limited to the aforementioned devices.

[0360] The various embodiments of this document and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to include various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly indicates otherwise. In this document, each of the phrases "A or B", "at least one of A and B", "at least one of A or B", "A, B, or C", "at least one of A, B, and C", and "at least one of A, B, or C" can include any one of the items listed together in the corresponding phrase among those phrases, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used merely to distinguish one component from another, and do not limit the components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as "coupled" or "connected" to another component (e.g., a second component), with or without the terms "functionally" or "communicatively," it means that the component can be connected to the other component directly (e.g., wired), wirelessly, or through a third component.

[0361] The term "module" used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit. A module may be an integral component, or a minimum unit or part of such a component that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0362] Various embodiments of the present document may be implemented as software (e.g., a program (140)) including one or more instructions stored in a storage medium (e.g., an internal memory (136) or an external memory (138)) readable by a machine (e.g., an electronic device (101)). For example, a processor (120) (e.g., the processor (120)) of a machine (e.g., an electronic device (101)) may call at least one instruction among the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain signals (e.g., electromagnetic waves), and the term does not distinguish between cases where data is stored semi-permanently or temporarily on the storage medium.

[0363] According to one embodiment, the method according to various embodiments disclosed in the present document may be provided as included in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) via an application store (e.g., Play Store™) or directly between two user devices (e.g., smart phones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium, such as a memory (130) of a manufacturer's server, an application store's server, or a relay server.

[0364] According to various embodiments, each component (e.g., a module or a program) of the above-described components may include one or more entities, and some of the entities may be separated and placed in other components. According to various embodiments, one or more components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (e.g., a module or a program) may be integrated into a single component. In such a case, the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. According to various embodiments, the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In a foldable electronic device, Housing, said housing comprising: Part 1 Housing, Second housing part, and Includes a third housing part; A first hinge assembly including a first gear set for rotatably connecting the first housing part and the third housing part and rotating the third housing part together with the rotation of the first housing part; and A second hinge assembly including a second gear set for rotatably connecting the second housing part and the third housing part and rotating the third housing part together with the rotation of the second housing part, The number of gears included in the above second gear set is: To provide a folded state of the foldable electronic device in which the front side of the first housing part faces the front side of the third housing part and the rear side of the first housing part faces the front side of the second housing part, the number of gears included in the first gear set is greater than the number of gears included in the first gear set. Foldable electronic devices.

2. In paragraph 1, The above first hinge assembly, A first rotating plate rotatably coupled to the first housing part; A second rotating plate rotatably coupled to the third housing part; a first shaft coupled to the first rotating plate, and comprising a second shaft coupled to the second rotating plate; The above first gear set, A first gear coupled to the first shaft, A second gear coupled to the second shaft, A third gear meshing with the above first gear, and including a fourth gear meshing with the second gear and the third gear; The above second hinge assembly: A third rotating plate coupled to the second housing part; A fourth rotating plate coupled to the third housing part; a third shaft coupled to the third rotating plate, and comprising a fourth shaft coupled to the fourth rotating plate; The above second gear set, A fifth gear coupled to the third shaft; A sixth gear coupled to the fourth shaft, A seventh gear meshing with the above fifth gear, An 8th gear meshing with the above 7th gear, A ninth gear meshing with the above eighth gear, and Including a tenth gear meshing with the sixth gear and the ninth gear, The above first hinge assembly: Rotation of the first shaft according to rotation of the first housing part, Rotation of the first gear according to rotation of the first shaft; Rotation of the third gear according to the rotation of the first gear, Rotation of the fourth gear according to the rotation of the third gear, Rotation of the second gear according to the rotation of the fourth gear, Rotation of the second shaft according to the rotation of the second gear, and By the rotation of the third housing part according to the rotation of the second shaft, the third housing part is configured to rotate together with the rotation of the first housing part, The above second hinge assembly: Rotation of the third shaft according to rotation of the second housing part, Rotation of the fifth gear according to rotation of the third shaft, Rotation of the seventh gear according to the rotation of the fifth gear, Rotation of the 8th gear according to the rotation of the 7th gear, Rotation of the 9th gear according to the rotation of the 8th gear, Rotation of the 10th gear according to the rotation of the 9th gear, Rotation of the 6th gear according to the rotation of the 10th gear, Rotation of the fourth shaft according to the rotation of the sixth gear, and By the rotation of the third housing part according to the rotation of the fourth shaft, the third housing part is configured to rotate together with the rotation of the second housing part. Foldable electronic devices.

3. In paragraph 2, The distance between the third shaft and the fourth shaft is, longer than the distance between the first shaft and the second shaft, Foldable electronic devices.

4. In paragraph 2 or 3, The above fifth gear is, Paired with the above 6th gear, The above 7th gear is, Paired with the above 10th gear, The above 8th gear is, Paired with the above 9th gear, Foldable electronic devices.

5. In paragraph 4, The size of the above 7th gear is, Larger than the size of the above 5th gear and smaller than the size of the above 9th gear, Foldable electronic devices.

6. In paragraph 4 or 5, Further comprising a flexible display disposed on the first housing part, the second housing part, and the third housing part, In the folded state of the foldable electronic device, a distance between the rotation axis of the eighth gear and the rear side of the flexible display is longer than a distance between the rotation axis of the fifth gear and the rear side of the flexible display and shorter than a distance between the rotation axis of the seventh gear and the rear side of the flexible display. Foldable electronic devices.

7. In any one of paragraphs 4 to 6, Further comprising a flexible display disposed on the first housing part, the second housing part, and the third housing part, In the folded state of the foldable electronic device, the distance between the rotation axis of the first gear and the rear side of the flexible display is shorter than the distance between the rotation axis of the third gear and the rear side of the flexible display. Foldable electronic devices.

8. In any one of paragraphs 1 to 7, A flexible display comprising a first bending portion disposed on the first housing part, the second housing part, and the third housing part, the first bending portion being bent by rotation of the first housing part relative to the third housing part, and a second bending portion being bent by rotation of the second housing part relative to the third housing part; A first support plate coupled to the first hinge assembly, positioned below the first bending portion of the flexible display, and spaced apart from the first bending portion of the flexible display within the folded state of the foldable electronic device; and Further comprising a second support plate coupled to the second hinge assembly, positioned below the second bending portion of the flexible display, and in contact with the second bending portion of the flexible display within the folded state of the foldable electronic device. Foldable electronic devices.

9. In paragraph 8, The above second support plate, Based on the rotation of the second gear set, a first sub-support plate and a second sub-support plate are configured to move. Foldable electronic devices.

10. In clause 8 or 9, In the folded state of the foldable electronic device, the second bending portion configured to contact the second support plate, A flat portion that is in contact with the second support plate, so as to be supported by the second support plate, and extending from the flat portion and including a curved portion spaced apart from the second support plate, Foldable electronic devices.

11. In any one of paragraphs 1 to 10, a first hinge cover at least partially accommodating the first hinge assembly; and Further comprising a second hinge cover at least partially accommodating the second hinge assembly; The width of the above second hinge cover is: Wider than the width of the first hinge cover above, Electronic devices.

12. In paragraph 11, The above first hinge cover, Within the folded state, substantially covered by the first housing part and the third housing part, At least a portion of the second hinge cover, In the above folded state, exposed between the second housing part and the third housing part, Foldable electronic devices.

13. In any one of paragraphs 1 to 12, The above first hinge assembly, comprising at least one first elastic member, The above second hinge assembly, comprising at least two second elastic members, The number of at least two second elastic members is, greater than the number of at least one first elastic member, Electronic devices.

14. In any one of paragraphs 1 to 13, The above second hinge assembly, a third rotating plate coupled to the second housing part, and Including a fourth rotating plate coupled to the third housing part, Each of the third rotation plate and the fourth rotation plate, A first rotary member comprising a rotary rail and coupled to the second housing part or the third housing part, A guide member that includes a guide groove that guides the rotation of the first rotary member by inserting the rotary rail, and is coupled to the second housing part or the third housing part, a connecting member including a slot and coupled with the first rotating member; and A second rotating member including a projection that is inserted into the slot and moves within the slot to limit the rotational range of the first rotating member, and a shaft that is connected to some of the second gear sets to transmit the rotational force of the second gear set to the first rotating member through the connecting member. Electronic devices.

15. In paragraph 14, The above slot is, A first engaging portion spaced apart from one end of the above slot by a specified distance and protruding toward the inside of the above slot, and A second engaging portion is spaced apart from the other end of the slot opposite to the above-mentioned end by the above-mentioned specified distance and protrudes toward the inside of the slot. Electronic devices.

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