Patent Publication Number: US-2023161382-A1

Title: Electronic device including friction reducing structure

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is based on and claims priority under 35 U.S.C. §119 to Korean Patent Application No. 10-2020-0131417, filed on Oct. 12, 2020, in the Korean Intellectual Property Office, and Korean Patent Application No. 10- 2020-0148475, filed on Nov. 9, 2020, in the Korean Intellectual Property Office, the disclosures of which are incorporated by reference herein in their entireties. 
     BACKGROUND 
     Field 
     The disclosure relates to an electronic device including a friction reducing structure. 
     Description of Related Art 
     Electronic devices are gradually becoming slim, and have been improved to increase the rigidity, to enhance design aspects, and to differentiate functional elements thereof. Electronic devices are gradually changing from existing rectangular shapes to more diversified shapes. An electronic device may have a deformable structure such that, to be carried conveniently, a large-screen display can be used. As an example of the deformable structure, an electronic device may have a housing coupling structure which operates in a sliding type, and a structure (for example, a rollable structure), the display area of which is increased by a flexible display supported thereby. Such an electronic device may be required to have a structure capable of minimizing interference between housings that operate while rotating with regard to each other. 
     An electronic device may include a deformable slidable electronic device (for example, a rollable electronic device), the display area of which can be increased during use. The slidable electronic device may include a housing (for example, a first housing, a base housing, or a base bracket) and a slide structure (for example, a second housing, a slide housing, or a slide bracket), which may be coupled to be able to move with regard to each other in an at least partially fitted-together type. For example, the slide structure may slide-in or slide-out in a designated direction and by a designated reciprocating distance, thereby varying the display area of the flexible display. The slide structure may be coupled so as to support at least a part of the flexible display (or expandable display) and to operate in an at least partially sliding type from the housing. In addition, the slide structure may be manually slid-in or slid-out by the user, or may automatically switch to a slide-in state or a slide-out state by means of an internal driving mechanism, thereby inducing variation of the display area. 
     The slidable electronic device may have a guide structure coupled such that the slide structure makes reciprocating movements by a designated distance from the housing. The guide structure may at least partially entail surface friction (for example, friction resistance) between the housing and the slide structure, and such surface friction may result in slide feeling degradation and/or wear, and may even cause an operation failure. In order to address such problems, the guide structure may have an additional physical structure (for example, a bearing or a lubricant) for reducing the frictional force, but such a physical structure may gradually lose the friction reducing effect over time, and the above problem may recur. There may also occur a problem in that the bendable flexible display, when moving to the inner space of the housing, may be lifted by the restoring force that tends to unfold the same. 
     The above information is presented as background information only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. 
     SUMMARY 
     Embodiments of the disclosure provide an electronic device including a friction reducing structure. 
     Embodiments of the disclosure provide an electronic device including a friction reducing structure, the operational reliability of which can be improved even after a long period of use. 
     Embodiments of the disclosure provide an electronic device including a structure capable of preventing and/or reducing a flexible display from making an undesirable movement during a slide-in/slide-out operation. 
     According to various example embodiments, an electronic device may include: a housing including an inner space; a slide structure including a reciprocating slide coupled to the housing and configured to be slidable from the housing by a predetermined reciprocating distance along a first direction; a flexible display disposed to be at least partially supported by the slide structure and received in the inner space to be at least partially invisible from the outside in a slide-in state; and a first friction reducing structure disposed between the housing and the slide structure, wherein the first friction reducing structure includes: a guide slit disposed in a direction parallel to the first direction and having a predetermined length in the housing; a guide protrusion arranged to be guided by the guide slit in the slide structure; at least one first magnet disposed on the guide slit; and at least one second magnet disposed at a position affected by a magnetic force of the first magnet, on the guide protrusion, wherein the at least one first magnet and the at least one second magnet are arranged to have identical polarities facing each other, at least partially, along a second direction perpendicular to the first direction. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features and advantages of certain embodiments of the present disclosure will be more apparent from the following detailed description, taken in conjunction with the accompanying drawings, in which: 
         FIG.  1    is a block diagram illustrating an example electronic device in a network environment according to various embodiments; 
         FIG.  2 A  is a front perspective view of an electronic device, illustrating an example slide-in state according to various embodiments; 
         FIG.  2 B  is a front perspective view of an electronic device, illustrating an example slide-out state according to various embodiments; 
         FIG.  3 A  is a rear perspective view of an electronic device, illustrating an example slide-in state according to various embodiments; 
         FIG.  3 B  is a rear perspective view of an electronic device, illustrating an example slide-out state according to various embodiments; 
         FIG.  4    is an exploded perspective view of an electronic device according to various embodiments; 
         FIG.  5 A  is a partial perspective view of an electronic device, illustrating an example guide structure of a slide structure and a guide rail according to various embodiments; 
         FIG.  5 B  is a partial cross-sectional perspective view of an electronic device, illustrating an example guide structure of a slide structure and a guide rail, and a friction reducing structure according to various embodiments; 
         FIG.  6 A  is a partial cross-sectional view of an electronic device, taken along line 6a-6a of  FIG.  5 B , according to various embodiments; 
         FIG.  6 B  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments; 
         FIG.  6 C  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments; 
         FIG.  7 A  is a diagram illustrating an example arrangement position of a first magnet in a slide-in state of an electronic device according to various embodiments; 
         FIG.  7 B  is a diagram illustrating an example arrangement position of a first magnet in a slide-out state of an electronic device according to various embodiments; 
         FIG.  8 A  is a diagram illustrating an example friction reducing structure disposed in an electronic device according to various embodiments; 
         FIG.  8 B  is a diagram illustrating an example friction reducing structure disposed in an electronic device according to various embodiments; 
         FIG.  9 A  is a partial perspective view of an electronic device, illustrating an example slide structure including a bendable member, according to various embodiments; 
         FIG.  9 B  is a partial perspective view of an electronic device, illustrating an example slide structure including a bendable member, according to various embodiments; 
         FIG.  10    is a partial cross-sectional view of an electronic device, taken along line  10 - 10  of  FIG.  9 B , according to various embodiments; 
         FIG.  11 A  is a partial cross-sectional view of an electronic device taken along line  11   a - 11   a  of  FIG.  10    according to various embodiments; 
         FIG.  11 B  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments; 
         FIG.  11 C  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments; 
         FIG.  12 A  is a perspective view illustrating an example slide structure including a bendable member, according to various embodiments; 
         FIG.  12 B  is a cross-sectional view illustrating an example slide-in state of an electronic device including a friction reducing structure according to various embodiments; 
         FIG.  12 C  is a cross-sectional view illustrating an example slide-out state of an electronic device including a friction reducing structure according to various embodiments; 
         FIG.  13 A  is a diagram illustrating an example electronic device including a friction reducing structure according to various embodiments; 
         FIG.  13 B  is a partial perspective view illustrating an example cover member according to various embodiments; 
         FIG.  13 C  is a partial perspective view of an electronic device including an example friction reducing structure according to various embodiments; 
         FIG.  14 A  is a diagram illustrating an example arrangement position of a friction reducing structure with respect to an operation of an electronic device according to various embodiments; 
         FIG.  14 B  is a diagram illustrating an example arrangement position of a friction reducing structure with respect to an operation of an electronic device according to various embodiments; 
         FIG.  14 C  is a diagram illustrating an example arrangement position of a friction reducing structure with respect to an operation of an electronic device according to various embodiments; and 
         FIG.  15    is a partial cross-sectional view of an electronic device including an example friction reducing structure according to various embodiments. 
     
    
    
     DETAILED DESCRIPTION 
       FIG.  1    is a block diagram illustrating an example electronic device  101  in a network environment  100  according to various embodiments. 
     Referring to  FIG.  1   , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or at least one of an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , memory  130 , an input module  150 , a sound output module  155 , a display module  160 , an audio module  170 , a sensor module  176 , an interface  177 , a connecting 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 (SIM)  196 , or an antenna module  197 . In various embodiments, at least one of the components (e.g., the connecting terminal  178 ) may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In various embodiments, some of the components (e.g., the sensor module  176 , the camera module  180 , or the antenna module  197 ) may be implemented as a single component (e.g., the display module  160 ). 
     The processor  120  may execute, for example, 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  coupled with the processor  120 , and may perform various data processing or computation. According to an embodiment, as at least part of the data processing or computation, the processor  120  may store a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in non-volatile memory  134 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)), or an auxiliary processor  123  (e.g., a graphics processing unit (GPU), a neural processing unit (NPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction 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 adapted to consume less power than the main processor  121 , or to be specific to a specified function. The auxiliary processor  123  may be implemented as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one component (e.g., the display module  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead 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 state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . According to an embodiment, the auxiliary processor  123  (e.g., the neural processing unit) may include a hardware structure specified for artificial intelligence model processing. An artificial intelligence model may be generated by machine learning. Such learning may be performed, e.g., by the electronic device  101  where the artificial intelligence is performed or via a separate server (e.g., the server  108 ). Learning algorithms may include, but are not limited to, e.g., supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include a plurality of artificial neural network layers. The artificial neural network may be 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), deep Q-network or a combination of two or more thereof but is not limited thereto. The artificial intelligence model may, additionally or alternatively, include a software structure other than the hardware structure. 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored in the memory  130  as software, and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input module  150  may receive a command or data to be used by another component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input module  150  may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen). 
     The sound output module  155  may output sound signals to the outside of the electronic device  101 . The sound output module  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record. The receiver may be used for receiving incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part of the speaker. 
     The display module  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display module  160  may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display module  160  may include a touch sensor adapted to detect a touch, or a pressure sensor adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input module  150 , or output the sound via the sound output module  155  or a headphone of an external electronic device (e.g., an electronic device  102 ) directly (e.g., wiredly) or wirelessly coupled with the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     A connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the electronic device  102 ). According to an embodiment, the connecting terminal  178  may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to an embodiment, the power management module  188  may be implemented as at least part of, for example, a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently from the processor  120  (e.g., the application processor (AP)) and supports a direct (e.g., wired) communication or a wireless communication. According to an 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 (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the 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., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module  196 . 
     The wireless communication module  192  may support a 5G network, after a 4G network, and next-generation communication technology, e.g., new radio (NR) access technology. The NR access technology may support enhanced mobile broadband (eMBB), massive machine type communications (mMTC), or ultra-reliable and low-latency communications (URLLC). The wireless communication module  192  may support a high-frequency band (e.g., the mmWave band) to achieve, e.g., a high data transmission rate. The wireless communication module  192  may support various technologies for securing performance on a high-frequency band, such as, e.g., beamforming, massive multiple-input and multiple-output (massive MIMO), full dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large scale antenna. The wireless communication module  192  may 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 an embodiment, the wireless communication module  192  may support a peak data rate (e.g., 20 Gbps or more) for implementing eMBB, loss coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of downlink (DL) and uplink (UL), or a round trip of 1 ms or less) for implementing URLLC. 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element including a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, the antenna module  197  may include a plurality of antennas (e.g., array antennas). In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  (e.g., the wireless communication module  192 ) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module  197 . 
     According to various embodiments, the antenna module  197  may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, a RFIC disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a designated high-frequency band (e.g., the mmWave band), and a plurality of antennas (e.g., array antennas) disposed on a second surface (e.g., the top or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals of the designated high-frequency band. 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the electronic devices  102  or  104  may be a device of a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used, for example. The electronic device  101  may provide ultra low-latency services using, e.g., distributed computing or mobile edge computing. In another embodiment, the external electronic device  104  may include an internet-of-things (IoT) device. The server  108  may be an intelligent server using machine learning and/or a neural network. According to an embodiment, the external electronic device  104  or the server  108  may be included in the second network  199 . The electronic device  101  may be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology or IoT-related technology. 
     The electronic device according to various embodiments may be one of various types of electronic devices. The electronic devices may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, a home appliance, or the like. According to an embodiment of the disclosure, the electronic devices are not limited to those described above. 
     It should be appreciated that various embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, each of such phrases as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B, or C,” “at least one of A, B, and C,” and “at least one of A, B, or C,” may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “1st” and “2nd,” or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” “connected with,” or “connected to” another element (e.g., a second element), the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used in connection with various embodiments of the disclosure, the term “module” may include a unit implemented in hardware, software, or firmware, or any combination thereof, and may interchangeably be used with other terms, for example, “logic,” “logic block,” “part,” or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. For example, according to an embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Various embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., internal memory  136  or external memory  138 ) that is readable by a machine (e.g., the electronic device  101 ). For example, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it, with or without using one or more other components under the control of the processor. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a complier or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Wherein, the “non-transitory” storage medium is a tangible device, and may not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an embodiment, a method according to various embodiments of the disclosure may be included and provided 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 be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smart phones) directly. If distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer’s server, a server of the application store, or a relay server. 
     According to various embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities, and some of the multiple entities may be separately disposed in different components. According to various embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, according to various embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to various embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added. 
       FIG.  2 A  is a front perspective view of an electronic device, illustrating an example slide-in state according to various embodiments, and  FIG.  2 B  is a front perspective view of an electronic device, illustrating an example slide-out state according to various embodiments.  FIG.  3 A  is a rear perspective view of an electronic device, illustrating an example slide-in state according to various embodiments, and  FIG.  3 B  is a rear perspective view of an electronic device, illustrating an example slide-out state according to various embodiments. 
     The electronic device  200  of  FIGS.  2 A,  2 B,  3 A and  3 B  (which may be referred to hereinafter as “ FIGS.  2 A to  3 B ) may be at least partially similar to the electronic device  101  of  FIG.  1    or may include other embodiments of an electronic device. 
     Referring to  FIGS.  2 A to  3 B , the electronic device  200  may include: a housing  210  (e.g., a housing structure, a first housing, or a base housing); a slide structure  250  (e.g., a slide structure, a second housing, or a slide housing) coupled to be movable from the housing  210  by a predetermined reciprocating distance in a predetermined direction (e.g., X-axis direction); a bendable member or a bendable support (e.g., the bendable member  260  of  FIG.  4   ) (e.g., hinge rail or articulated hinge module) coupled to one end of the slide structure  250  and received in an inner space of the housing  210  in a slide-in state by bending; and a flexible display  230  (e.g., expandable display) disposed to be supported by the slide structure  250  and the bendable member (e.g., the bendable member  260  of  FIG.  4   ). According to an embodiment, in a slide-in state, the flexible display  230  may be received in the inner space of the housing  210  while being supported by the bendable member (e.g., the bendable member  260  of  FIG.  4   ), and thus may be disposed to be invisible from the outside. According to an embodiment, in a slide-out state, the flexible display  230  may be disposed to be visible from the outside while being supported by the bendable member (e.g., the bendable member  260  of  FIG.  4   ) forming a plane same as that of the slide structure  250 . 
     According to various embodiments, the electronic device  200  may include a housing  210  (e.g., housing structure) including: a front surface  210   a  (e.g., first surface) directed to a first direction (e.g., Z-axis direction); a rear surface  210   b  (e.g., second surface) directed to a second direction (e.g., -Z-axis direction); and a side surface  210   c  surrounding a space between the front surface  210   a  and the rear surface  210   b  and at least partially exposed to the outside. According to an embodiment, the rear surface  210   b  may include a rear cover  221  including at least a part of the housing  210 . According to an embodiment, the housing  210  may be configured by: a base bracket (e.g., the base bracket  240  of  FIG.  4   ) disposed in the inner space of the electronic device  200  and guiding the slide structure  250 ; one or more side covers  211  and  212 , each of which is coupled to at least a part of the base bracket (e.g., the base bracket  240  of  FIG.  4   ); and at least one part of a rear cover  221 . According to an embodiment, the rear cover  221  may be formed of polymer, coated or colored glass, ceramic, metal (e.g., aluminum, stainless steel (STS), or magnesium), or a combination of at least two among the above materials. In various embodiments, the rear cover  221  may extend up to at least a part of the side surface  210   c . 
     According to various embodiments, the side surface  210   c  may include: a first side surface  2101  having a first length; a second side surface  2102  extending in a direction perpendicular from the first side surface  2101  to have a second length longer than the first length; a third side surface  2103  extending parallel to the first side surface  2101  from the second side surface  2102  and having the first length; and a fourth side surface  2104  extending parallel to the second side surface  2102  from the third side surface  2103  and having the second length. According to an embodiment, the slide structure  250  may support the flexible display  230 , and may be slid out from the second side surface  2102  in the direction of the fourth side surface  2104  (e.g., X-axis direction) to increase the display area of the flexible display  230  or may be slid in from the fourth side surface  2104  in the direction of the second side surface  2102  (e.g., -X-axis direction) to reduce the display area of the flexible display  230 . According to an embodiment, the one or more side covers  211  and  212  may be disposed on the first side surface  2101  and the third side surface  2103 , respectively. 
     According to various embodiments, the slide structure  250  may include a side surface member  251  at least partially supporting the flexible display  230  and disposed at a position at which the same is visible from the outside in a slide-in state and/or a slide-out state. According to an embodiment, the side surface member  251  may include: a fifth side surface  2511  slidably coupled to the first side surface  2101 ; a sixth side surface  2512  extending from the fifth side surface  2511  and at least partially facing the fourth side surface  2104  in a slide-in state; and a seventh side surface  2513  extending from the sixth side surface  2512  and slidably coupled to the third side surface  2103 . According to an embodiment, the fifth side surface  2511  and the seventh side surface  2513  may be arranged to be invisible from the outside in a slide-in state by sliding in the inner space of the housing  210 . According to various embodiments, the fifth side surface  2511  and the seventh side surface  2513  may also be arranged to be at least partially visible from the outside in a slide-in state by partially sliding in the inner space of the housing  210 . 
     According to various embodiments, the flexible display  230  may include: a first area  230   a  (e.g., flat part) supported by the slide structure  250 ; and a second area  230   b  (e.g., bendable part) extending from the first area  230   a  and supported by the bendable member (e.g., the bendable member  260  of  FIG.  4   ). According to an embodiment, when the electronic device  200  is in a slide-in state, the second area  230   b  of the flexible display  230  may be disposed to be slid in the inner space of the housing  210  and unexposed to the outside, and when the electronic device  200  is in a slide-out state, the second area  230   b  of the flexible display  230  may be exposed to the outside so as to extend from the first area  230   a  while being supported by the bendable member (e.g., the bendable member  260  of  FIG.  4   ). Accordingly, the electronic device  200  may include a rollable type and/or a slidable type electronic device in which the display area of the flexible display  230  varies as the slide structure  250  moves from the housing  210 . 
     According to various embodiments, the slide structure  250  may be coupled in a sliding manner to be at least partially slid in or slid out from the housing  210 . For example, the electronic device  200  may be configured to have a first width W1 from the second side surface  2102  to the fourth side surface  2104  in a slide-in state. According to various embodiments, the electronic device  200  in a slide-out state may be operated to have a third width W3 greater than the first width W1 as the bendable member (e.g., the bendable member  260  of  FIG.  4   ) slid in the housing  210  moves in a predetermined direction (e.g., X-axis direction) to have an additional second width W2. Therefore, the flexible display  230  may have a display area substantially of the first width W1 in the slid-in state, and may have an increased display area substantially of the third width W3 in the slide-out state. According to an embodiment, the flexible display  230  may also be disposed such that the same includes a flat surface, and curved surfaces extending from the flat surface toward the edges on both sides thereof. 
     According to various embodiments, the slide structure  250  may be operated through the user’s manipulation. For example, the electronic device  200  may transition to a slide-in state or a slide-out state through the user’s manipulation of pressing the outer surface of the flexible display  230  in a predetermined direction. In various embodiments, in the electronic device  200 , the slide structure  250  may be automatically slid out in a predetermined direction (e.g., X-axis direction) through the operation of a button (not shown) of a locker (not shown) exposed to the outside. In this case, the slide structure  250  may be controlled such that the same is retained in the slide-in state through the locker (not shown) while holding a restoring force to be slid out by an elastic member (e.g., torsion spring) when pressed in a predetermined direction (e.g., -X axis direction). In various embodiments, the slide structure  250  may be automatically operated through a driving mechanism (e.g., a driving motor, a reduction module and/or a gear assembly) disposed in the inner space of the housing  210 . According to various embodiments, the electronic device  200  may be configured such that the operation of the slide structure  250  is controlled through a driving mechanism when an event for the transition of slide in/out state is detected in the electronic device  200  through a processor (e.g., the processor  120  of  FIG.  1   ). In various embodiments, the processor (e.g., the processor  120  of  FIG.  1   ) of the electronic device  200  may control the flexible display  230  such that an object is displayed in various manner and an application program is executed, in response to the display area of the flexible display  230  changing according to a slide-in state, a slide-out state, or an intermediate state. 
     According to various embodiments, the electronic device  200  may include at least one of an input device  203 , sound output devices  206  and  207 , sensor modules  204  and  217 , camera modules  205  and  216 , a connector port  208 , a key input device (not shown), or an indicator (not shown). In another embodiment, the electronic device  200  may be configured such that at least one of the above-described elements is omitted or other elements are additionally included. 
     According to various embodiments, the input device  203  may include a microphone. In various embodiments, the input device  203  may include a plurality of microphones arranged to detect the direction of sound. The sound output devices  206  and  207  may include speakers. The sound output devices  206  and  207  may include an external speaker  206  and a call receiver  207 . In another embodiment, the sound output devices  206  and  207  may include a speaker (e.g., piezo speaker) operated without a separate speaker hole. 
     According to various embodiments, the sensor modules  204  and  217  may generate electrical signals or data values corresponding to an internal operating state of the electronic device  200  or an external environmental state thereof. The sensor modules  204  and  217  may include, for example, a first sensor module  204  (e.g., proximity sensor or illumination sensor) disposed on the front surface  210   a  of the electronic device  200 , and/or a second sensor module  217  (e.g., heart rate monitoring (HRM) sensor) disposed on the rear surface  210   b  of the electronic device  200 . According to an embodiment, the first sensor module  204  may be disposed under the flexible display  230  with respect to the front surface  210   a  of the electronic device  200 . According to an embodiment, the first sensor module  204  may include at least one of a proximity sensor, an illuminance sensor, a time of flight (TOF) sensor, an ultrasonic sensor, a fingerprint recognition sensor, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, or a humidity sensor. 
     According to various embodiments, the camera modules  205  and  216  may include a first camera module  205  disposed on the front surface  210   a  of the electronic device  200 , and a second camera module  216  disposed on the rear surface  210   b  of the electronic device  200 . According to an embodiment, the electronic device  200  may include a flash  218  positioned near the second camera module  216 . According to an embodiment, the camera modules  205  and  216  may include one or more lenses, an image sensor, and/or an image signal processor. According to an embodiment, the first camera module  205  may be configured to be disposed under the flexible display  230  and to photograph a subject through a part of the active area of the flexible display  230 . According to an embodiment, the flash  218  may include, for example, a light emitting diode or a xenon lamp. 
     According to various embodiments, some camera modules  205  among the camera modules  205  and  216 , some sensor modules  204  among the sensor modules  204  and  217 , or the indicator may be arranged to be exposed through the flexible display  230 . For example, some camera modules  205 , some sensor modules  204 , or the indicator may be disposed in the inner space of the electronic device  200  so as to contact the external environment through a transmission area or an opening formed by perforating the flexible display  230 . According to an embodiment, an area where the flexible display  230  faces some camera modules  205 , which is a part of an area for displaying contents, may also be formed as a transmission area having a predetermined transmittance. According to an embodiment, the transmission area may be formed to have a transmittance in the range of about 5% to about 20%. This transmission area may include an area overlapping with an effective area (e.g., a field of view) of some camera modules  205 , through which light for generating an image formed by an image sensor passes. For example, the transmission area of the flexible display  230  may include an area having a pixel density and/or a wiring density lower than the periphery thereof. For example, the transmission area may replace the above-described opening. For example, some camera modules  205  may include an under display camera (UDC). In another embodiment, some sensor modules  204  may be arranged to perform a function thereof in the inner space of the electronic device  200  without being visually exposed through the flexible display  230 . 
     According to various embodiments, the electronic device  200  may include at least one antenna (e.g., the antenna module  197  of  FIG.  1   ). According to an embodiment, at least one antenna (e.g., the antenna module  197  in  FIG.  1   ), for example, may be configured to transmit and receive a signal for wirelessly communicating with an external electronic device (e.g., the electronic device  104  in  FIG.  1   ). According to an embodiment, the electronic device  200  may also include another antenna (not shown) disposed in the inner space thereof. According to an embodiment, another antenna may wirelessly transmit and receive power required for charging. According to various embodiments, at least one antenna and/or another antenna may include a legacy antenna, mmWave antenna, near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. 
     The electronic device  200  according to various embodiments may include a friction reducing structure applied to a guide structure between the housing  210  and the slide structure  250 . For example, the friction reducing structure may be disposed between the first side surface and the fifth side surface and/or between the third side surface and the seventh side surface. In various embodiments, the friction reducing structure may also be disposed between the bendable member (e.g., bendable member  260  of  FIG.  4   ) and the housing  210 . In various embodiments, the friction reducing structure may also be disposed between the flexible display  230  and the rear cover  221 . The electronic device  200  according to the example embodiments may include a friction reducing structure to reduce the frictional resistance generated between the housing  210  and the slide structure  250  during the slide in/out operation, so as to improve a sliding feeling and reduce abrasion, thereby securing the reliability of the device. In addition, lifting of the flexible display  230 , occurring during the slide in/out operation, may be prevented and/or reduced. 
       FIG.  4    is an exploded perspective view of an electronic device according to various embodiments. 
     Referring to  FIG.  4   , the electronic device  200  may include: a base bracket  240  including at least one guide roller  241  arranged rotatably; a slide structure  250  coupled to the base bracket  240  to be slidable by a predetermined reciprocating distance; a bendable member  260  disposed to move together with the slide structure  250 ; a flexible display  230  disposed to be supported by the slide structure  250  and the bendable member  260 ; a cover member  221  (e.g., rear cover) fixed to at least a part of the base bracket  240 ; and the one or more side covers  211  and  212 , each of which is at least partially fixed to the base bracket  240  and forms at least a part of the side appearance of the electronic device. According to an embodiment, the side covers  211  and  212  may include a first side cover  211  and a second side cover  212  which are disposed opposite to each other. According to an embodiment, the electronic device  200  may form a housing (e.g., the housing  210  of  FIG.  2 A ) (e.g., housing structure) including an inner space through the base bracket  240 , the cover member  221 , and the one or more side covers  211 ,  212 . According to an embodiment, the electronic device  200  may include various electrical structures, such as a substrate  271 , disposed in an inner space thereof. 
     According to various embodiments, the slide structure  250  may be formed at least partially in a plate shape, and may include: a first surface  2501  facing a first direction (e.g., z-axis direction); a second surface  2502  facing a second direction (e.g., -z-axis direction) opposite to the first direction; and a side member  251  at least partially surrounding a space between the first surface  2501  and the second surface  2502 . In various embodiments, the side member  251  may be integrally formed with the slide structure  250 . In various embodiments, the side member  251  may also be formed separately from the slide structure  250  to be structurally coupled thereto. According to an embodiment, at least a part of the first surface  2501  of the slide structure  250  may be formed in a shape for supporting the flexible display  230 . According to an embodiment, the bendable member  260  (e.g., multi-bar assembly) may be coupled to be interlocked with the slide structure  250 . According to an embodiment, when the electronic device  200  is in a slide-in state, the bendable member  260  may be slid in the housing (e.g., the housing  210  of  FIG.  2 A ) together with a part of the flexible display  230  and thus may guide the flexible display  230  to have a first display area. According to an embodiment, when the electronic device  200  is in a slide-out state, the bendable member  260  may form a plane same as that of the slide structure  250  and guide the flexible display  230  such that a part thereof is visible from the outside. In this case, the flexible display  230  may have a second display area larger than the first display area. 
     According to various embodiments, the slide structure  250  may include at least one electronic component  204  or  205  disposed in a space formed through structural change of a first surface  2501  facing the flexible display  230  and/or the second surface  2502  between the slide structure  250  and the base bracket  240 . According to an embodiment, the at least one electronic component  204  or  205  may include the camera module  205  and/or the sensor module  204 . In various embodiments, the at least one electronic component may further include an antenna module (not shown) and/or a key button module (not shown). According to an embodiment, the at least one electronic component may be disposed to detect an external environment through the flexible display  230  when at least one electronic component includes the camera module  205  and/or the sensor module  204 . According to an embodiment, the slide structure  250  may include a support cover  2212  for covering a part in which the at least one electronic component  204  and  205  is disposed, so as to form a flat surface for supporting the flexible display  230 . In this case, the support cover  2212  may include at least one through holes  2212   a  or  2212   b  formed through a corresponding position at which the at least one electronic component (e.g., the camera module  205  and/or the sensor module  204 ) and the flexible display  230  face each other. 
     According to various embodiments, the base bracket  240  may include a third surface  2401  facing the slide structure  250 , and a fourth surface  2402  facing the opposite direction of the third surface  2401  and facing the cover member  221 . According to an embodiment, the base bracket  240  and/or the one or more side covers  211  and  212  may include a guide structure for receiving the slide structure  250  such that the same is slidable by a predetermined reciprocating distance (e.g., the guide slit  2111  of  FIG.  5 A ). According to an embodiment, the at least one guide roller  241  rotatably disposed on the base bracket  240  may be disposed in a manner of supporting at least a part of the bendable member  260  connected to the slide structure  250 . According to an embodiment, the electronic device  200  may include at least one tension belt  2411  which is supported by the guide roller  241  or disposed near the guide roller  241  and is used for supporting the bendable member  260  to prevent and/or reduce the bendable member  260  from lifting or drooping. 
     According to various embodiments, the electronic device  200  may include at least one support bracket  2211  (e.g., rear case) which is disposed between the base bracket  240  and the cover member  221  and provides rigidity to the electronic device  200  or provides a mounting space for components. In this case, the first substrate  271  (e.g., printed circuit board (PCB)) may be disposed in a space between the base bracket  240  and the support bracket  2211 . 
     According to various embodiments, the electronic device  200  may include an electrical connection structure for electrically connecting the first substrate  271  to the flexible display  230 . According to an embodiment, the electrical connection structure may include a bendable slide FPCB  280  for electrically connecting the substrate  271  to a display panel disposed to be folded toward the rear surface of the flexible display  230 . According to an embodiment, the slide FPCB  280  may be disposed in a manner of passing through a first opening  2504  formed through the slide structure  250  and a second opening  2404  formed through the base bracket  240 . For example, the slide FPCB  280  may include a connecting part  281  having a shape and length for receiving a slidable reciprocating distance (reciprocating stroke) of the slide structure  250 , and one end  2811  of the connecting part  281  may be electrically connected to the display panel after passing through the first opening  2504  of the slide structure  250 , and the other end  2812  of the connection part  281  may be electrically connected to the substrate  271  after passing through the second opening  2404  of the base bracket  240 . According to an embodiment, the slide FPCB  280  and the flexible display  230  and/or the slide FPCB  280  and the substrate  271  may be electrically connected through a connector coupling structure (e.g., coupling structure of a receptacle and a connector). 
     The electronic device  200  according to an example embodiment may include a friction reducing structure  290  for reducing frictional resistance generated by the guide structure between the slide structure  250  and the base bracket  240  (e.g., housing). According to an embodiment, the friction reducing structure  290  may include at least one first magnet  291  disposed on the first side cover  211 , and at least one second magnet  292  disposed on the fifth side surface  2511  of the slide structure  250  slidably guided to the first side cover. According to an embodiment, the at least one first magnet  291  and the at least one second magnet  292  may be arranged to be affected by the magnetic force along a second direction (direction ②) perpendicular to a first direction (direction (D) in which the slide structure  250  slides. According to an embodiment, the at least one first magnet  291  and the at least one second magnet  292  may be arranged such that identical polarities face each other, at least partially, along the second direction (direction ②). Accordingly, the slide structure  250  and the first cover member  211  may have reduced frictional resistance due to the surface contact reduced through placement using the repulsive force of the magnets  291  and  292 , during a sliding operation. In various embodiments, the friction reducing structure  290  may also be disposed on the second cover member  212  and the seventh side surface  2513  of the slide structure  250 . 
     Hereinafter, the friction reducing structure will be described in greater detail with reference to the drawings. 
       FIG.  5 A  is a partial perspective view of an electronic device, illustrating an example guide structure of a slide structure and a guide rail according to various embodiments.  FIG.  5 B  is a partial cross-sectional perspective view of an electronic device, illustrating an example guide structure of a slide structure and a guide rail, and a friction reducing structure according to various embodiments. 
     Referring to  FIGS.  5 A and  5 B , the electronic device  200  may include a housing (e.g., the housing  210  of  FIG.  2 A ) including the first side cover  211 , and the slide structure  250  slidably disposed along the first side cover  211  of the housing  210 . According to an embodiment, the first side cover  211  may include an outer cover  211   a , and a guide rail  211   b  disposed on the outer cover  211   a . According to an embodiment, the guide rail  211   b  may include a guide slit  2111  formed to have a predetermined length along the first direction (direction ①). According to an embodiment, the slide structure  250  may include a guide protrusion  253  protruding outward from the fifth side surface  2511  and guided along the guide slit  2111 . According to an embodiment, one or more guide protrusions  253  may also protrude from the fifth side surface  2511 . 
     According to various embodiments, the guide slit  2111  may have a width wide enough to guide the guide protrusion in the first direction (direction ①). Therefore, when the electronic device  200  transitions from a slide-in state to a slide-out state or transitions from the slide-out state to the slide-in state, the guide protrusion  253  may come into surface contact with the inner surface of the guide slit  2111 . Therefore, the electronic device  200  may provide an uneven sliding feeling to a user due to the increased frictional resistance, and when the electronic device  200  is used for a long period of time, the operational reliability thereof may be decreased due to the foreign substances such as dust generated by the abrasion. Therefore, the electronic device  200  according to example embodiments may include the friction reducing structure  290  disposed between the guide slit  2111  and the guide protrusion  253 . According to an embodiment, the friction reducing structure  290  may include at least one first magnet (e.g., the first magnet  291  of  FIG.  6 A ) disposed on the guide slit  2111 , and at least one second magnet (e.g., the second magnet  292  of  FIG.  6 A ) disposed on the guide protrusion  253 . According to an embodiment, the at least one first magnet (e.g., the first magnet  291  of  FIG.  6 A ) and the at least one second magnet (e.g., the second magnet  292  of  FIG.  6 A ) may be arranged to face each other so as to be affected by a magnetic force with respect to each other. For example, the at least one first magnet (e.g., the first magnet  291  of  FIG.  6 A ) and the at least one second magnet (e.g., the second magnet  292  of  FIG.  6 A ) may be arranged to have repulsive force with respect to each other along the vertical second direction (direction ②) perpendicular to the first direction (direction ①), and thus the frictional resistance due to contact between the guide protrusion  253  and the guide slit  2111  during the operation of the electronic device  200  may be reduced. 
       FIG.  6 A  is a partial cross-sectional view of an electronic device, taken along line 6a-6a of  FIG.  5 B , according to various embodiments. 
     Referring to  FIG.  6 A , the electronic device  200  may include the base bracket  240 , the housing  210  including the first side cover  211  coupled to the base bracket  240 , and the slide structure  250  disposed to be slidable from the housing  210 . According to an embodiment, the first side cover  211  may include the outer cover  211   a  and the guide rail  211   b  coupled to the outer cover  211   a . According to an embodiment, the slide structure  250  may be slid in and/or slid out the housing  210  as the guide protrusion  253  protruding from the fifth side surface  2511  is guided along the guide slit  2111  formed in the guide rail  211   b . According to an embodiment, the guide protrusion  253  may be integrally formed with the slide structure  250 . In various embodiments, the guide protrusion  253  may also be formed separately from the slide structure  250  to be structurally coupled thereto. 
     According to various embodiments, the friction reducing structure  290  may include at least one first magnet  291  disposed on the inner surface of the guide slit  2111  of the guide rail  211   b , and at least one second magnet  292  disposed at a position affected by the magnetic force of the first magnet  291 , in the outer surface of the guide protrusion  253 . According to an embodiment, the at least one first magnet  291  and the at least one second magnet  292  may be arranged such that identical polarities face each other at least partially, thereby generating the repulsive forces with respect to each other. For example, when the guide protrusion  253  is guided in the guide slit  2111 , the guide protrusion  253  may come into surface contact with the guide slit  2111  in a second direction (direction ②) perpendicular to a first direction (direction ①) in which the slide structure  250  moves. Accordingly, the at least one first magnet  291  may be arranged on each of an upper inner surface  2111   b  and an lower inner surface  2111   c  of the guide slit  2111 , with the guide protrusion  253  and the at least one second magnet  292  interposed therebetween, and the guide protrusion  253  and the inner side surface  2111   a  of the guide slit  2111  may be spaced apart from each other at a predetermined interval. Through this arrangement structure, the guide protrusion  253  may move without contacting the inner surface of the guide slit  2111  through the repulsive force acting between the at least one first magnet  291  and the at least one second magnet  292 , and thus may provide an improved sliding feeling and reduce abrasion. According to an embodiment, the friction reducing structure  290  may include a shielding member  2911  disposed between the at least one first magnet  291  and each of the inner surfaces of the guide slit  2111 . According to an embodiment, the shielding member  2911  may prevent and/or reduce external foreign substances (e.g., metal dust) affected by the magnetic force of the at least one first magnet  291  and the at least one second magnet  292  from sticking to the electronic device  200 . 
       FIG.  6 B  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments, and  FIG.  6 C  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments. 
     In the description of the electronic device  200  of  FIGS.  6 B and  6 C , the same reference numerals are assigned to components that are substantially the same as those of the electronic device  200  of  FIG.  6 A , and detailed descriptions thereof may be omitted. 
     Referring to  FIG.  6 B , the friction reducing structure  290  may include a first magnet  291  disposed on the guide slit  2111 , and a second magnet  292  disposed on the guide protrusion  253  to face the first magnet  291 . According to an embodiment, the first magnet  291  may be disposed in a manner of surrounding the second magnet  292  and the guide protrusion  253  in the guide slit  2111 . For example, the first magnet  291  may be disposed in a manner of surrounding the inner surfaces of the guide slit  2111  along the upper inner surface  2111   b , the inner side surface  2111  a, and the lower inner surface  2111   c . In this case, the shielding member  2911  may also be disposed to correspond to the first magnet  291  between the first magnet  291  and the inner surface of the guide slit  2111 . 
     Referring to  FIG.  6 C , the friction reducing structure  290  may include a first magnet  291  disposed in the guide slit  2111 , and a second magnet  292  coupled to the slide structure  250  to face the first magnet  291 . According to an embodiment, the second magnet  292  may be disposed to protrude from the fifth side surface  2511  of the slide structure  2500  by a predetermined amount, and thus may also serve as the aforementioned guide protrusion  253 . 
       FIG.  7 A  is a diagram illustrating an example arrangement position of a first magnet in a slide-in state of an electronic device according to various embodiments.  FIG.  7 B  is a diagram illustrating an example arrangement position of a first magnet in a slide-out state of an electronic device according to various embodiments. 
     Referring to  FIGS.  7 A and  7 B , the electronic device  200  may include the housing  210 , and the slide structure  250  disposed to be slidable from the housing  210  by a predetermined reciprocating distance in the first direction (direction ①). According to an embodiment, the electronic device  200  may be operated to have a first width W1 in a slide-in state (e.g., in the state in  FIG.  7 A ) and to have a third width W3 greater than the first width W1 in a slide-out state (e.g., in the state in  FIG.  7 B ) as the slide structure  250  extends by a second width W2. Accordingly, the total length T1 of the guide slit  2111  formed on the first side cover  211  and guiding the guide protrusion  253  of the slide structure  250  may be at least equal to or longer than the extended second width W2 of the slide structure  250 . 
     According to various embodiments, when the electronic device  200  transitions from a slide-in state to a slide-out state, or when the electronic device  200  transitions from the slide-out state to the slide-in state, the at least one second magnet  292  and the at least one first magnet  291  disposed on the inner surface of the guide slit  2111  may be arranged to have a repulsive force with respect to each other so as to push each other in the second direction (direction ②) perpendicular to the first direction (direction ①), and thus the guide protrusion  253  may be guided without contacting the inner surface of the guide slit  2111 . Accordingly, during the sliding operation, the guide protrusion  253  may have minimized and/or reduced surface contact with the guide slit  2111  and thus have reduced frictional resistance. 
       FIG.  8 A  is a diagram illustrating an example friction reducing structure disposed in an electronic device according to various embodiments, and  FIG.  8 B  is a diagram illustrating an example friction reducing structure disposed in an electronic device according to various embodiments. 
     In the description of the electronic device  200  of  FIGS.  8 A and  8 B , the same reference numerals are assigned to components that are substantially the same as or similar to those of the electronic device  200  of  FIGS.  7 A and  7 B , and detailed descriptions thereof may not be repeated here. 
     Referring to  FIG.  8 A , the friction reducing structure  290  may include at least one first magnet  291  disposed in the guide slit  2111 , and at least one second magnet  292  facing the first magnet  291  to react with each other and disposed on the guide protrusion  253 . According to an embodiment, the at least one first magnet  291  may include a plurality of magnets arranged at a predetermined interval. In this case, the at least one second magnet  292  disposed on the guide protrusion  253  may react with the plurality of magnets arranged at a predetermined interval to sequentially have a repulsive force during the movement of the guide protrusion  253 , and thus may not contact the inner surface of the guide slit  2111 . According to an embodiment, the distance at which the plurality of magnets are spaced from each other may be determined within a range in which plurality of magnets react with the at least one second magnet  292  disposed on the guide protrusion  253  by the magnetic force. 
     Referring to  FIG.  8 B , the friction reducing structure  290  may include: a first magnet  291  disposed at a corresponding position of the guide slit  2111  and facing the guide protrusion  253  during a sliding operation of the electronic device  200  (e.g., intermediate state); a second magnet  292  disposed on the guide protrusion  253  such that, in connection with the first magnet  291 , identical polarities face each other; a third magnet  293  disposed in the guide slit  2111  such that, in connection with the second magnet  292 , different polarities face each other in the slide-in state of the electronic device  200 ; and a fourth magnet  294  disposed in the guide slit  2111  such that, in connection with the second magnet  292 , different polarities face each other in the slide-out state of the electronic device  200 . 
     According to various embodiments, the arrangement structure of magnets arranged to have an attractive force between the second magnet  292  and the third magnet  293  may continuously maintain the slide-in state of the electronic device. According to an embodiment, the arrangement structure of magnets arranged to have an attractive force between the second magnet  292  and the fourth magnet  294  may continuously maintain the slide-out state of the electronic device. According to an embodiment, the arrangement structure of magnets arranged to have a repulsive force between the first magnet  291  and the second magnet  292  may reduce the frictional resistance between the guide protrusion  253  and the guide slit  2111  during the sliding operation of the electronic device  200 , thereby performing a smooth sliding operation. In various embodiments, the first magnet  291  may include a plurality of magnets arranged at predetermined interval. 
     Although not shown, when the above-described guide structure including a guide protrusion and a guide slit is applied to at least a part of a bendable member (e.g., the bendable member  260  of  FIG.  4   ) and between a first side cover (e.g., the first side cover  211  of  FIG.  2 A ) and/or a second side cover (e.g., the second side cover  212  of  FIG.  2 A ), at least one friction reducing structure among the aforementioned friction reducing structures may be applied to the guide structure. 
       FIG.  9 A  is a partial perspective view of an electronic device, illustrating an example slide structure including a bendable member, according to various embodiments, and  FIG.  9 B  is a partial perspective view of an electronic device, illustrating an example slide structure including a bendable member, according to various embodiments.  FIG.  10    is a partial cross-sectional view of an electronic device, taken along line  10 - 10  of  FIG.  9 B , according to various embodiments. 
     Referring to  FIGS.  9 A,  9 B and  10   , the electronic device  200  may include the housing  210 , and the slide structure  250  disposed to be movable from the housing  210  by a predetermined reciprocating distance in the first direction (direction ①). According to an embodiment, the housing  210  may include the base bracket  240 , and the side cover  211  coupled to the base bracket  240  (e.g., the first side cover  211  of  FIG.  2 A ). The side cover  211  may include the outer cover  211   a  forming at least a part of the outer appearance of the electronic device  200 , and the guide rail  211   b  coupled between the outer cover  211   a  and the base bracket  240 . According to an embodiment, the electronic device  200  may include the bendable member  260  which is connected to the slide structure  250 , received in the inner space of the housing  210  in a slide-in state, and forms a plane substantially the same as that of the slide structure  250  in a slide-out state, to support at least a part of the flexible display  230 . According to an embodiment, the bendable member  260  may include a plurality of multi-bars  261  arranged to be rotatable with respect to each other so as to have a predetermined curvature during the slide in/out operation. According to an embodiment, the outer cover  211   a  may include a cover part  2112  extending to cover the edges of the flexible display  230  and/or the bendable member  260 . 
     According to various embodiments, the electronic device  200  may include a friction reducing structure  290 - 1  disposed between the bendable member  260  and the cover part  2112  of the side cover  211  of the housing  210 , and thus reduce the frictional resistance between the bendable member  260  and the housing  210  and prevent and/or reduce lifting of the flexible display  230 . According to an embodiment, the friction reducing structure  290 - 1  may include a first magnet  295  disposed to face at least part of the plurality of multi-bars  261  at the cover part  2112 , and a second magnet  296  disposed on each of the plurality of multi-bars  261  to face the first magnet  295  at the cover part  2112 . In various embodiments, the second magnet  296  may be disposed on each of the designated multi-bars among the plurality of multi-bars  261 . According to an embodiment, the first magnet  295  and the second magnet  296  may be disposed to face each other along the second direction (direction ②) substantially perpendicular to the first direction (direction (D). According to an embodiment, the first magnet  295  and the second magnet  296  may be arranged such that identical polarities face each other, thereby having a repulsive force. Accordingly, the bendable member  260  may be pushed in the direction of the base bracket  240  along the second direction (direction ②) through the repulsive force acting through the first magnet  295  and the second magnet  296 , so that the frictional resistance with the cover part  2112  may be reduced, and the outward lifting occurring on the flexible display  230  supported by the bendable member  260  may also be reduced. 
       FIG.  11 A  is a partial cross-sectional view of an electronic device taken along line  11   a - 11   a  of  FIG.  10    according to various embodiments. 
     Referring to  FIG.  11 A , the electronic device  200  may include the housing  210  and the slide structure  250  disposed to be movable from the housing  210  by a predetermined reciprocating distance in a first direction (refer to direction ① of  FIG.  10   ). According to an embodiment, the cover part  2112  of the side cover  211  may be arranged to overlap the edge of the flexible display  230  and/or at least a part of the bendable member  260  when the flexible display  230  is viewed from above. According to an embodiment, the electronic device  200  may include the friction reducing structure  290 - 1  disposed at an overlapping part where the cover part  2112  and the bendable member  260  overlap. According to an embodiment, the friction reducing structure  290 - 1  may include the first magnet  295  disposed to face at least a part of the plurality of multi-bars  261  at the cover part  2112 , and the second magnet  296  disposed on the plurality of multi-bars  261  to face the first magnet  295  at the cover part  2112 . According to an embodiment, the plurality of multi-bars  261  may include a recess  2611  lower than the outer surface  260   a  (e.g., support surface) supporting the flexible display  230 , in order to receive the second magnet  296 . According to an embodiment, when the second magnet  296  is disposed in the recess  2611 , the second magnet  296  may form a plane substantially the same as that of the outer surface  260   a  of the plurality of multi-bars  261 . According to an embodiment, the flexible display  230  may be disposed not to overlap the first magnet  295  and the second magnet  296 . According to an embodiment, the electronic device  200  may further include a sweeper  2113  disposed between the cover part  2112  and the flexible display  230 , thereby removing foreign substances attached to the outer surface of the flexible display  230 . According to an embodiment, the sweeper  2113  may include a fabric or sponge. 
     According to various embodiments, the friction reducing structure  290 - 1  may include the shielding member  2911  disposed between the cover part  2112  and the first magnet  295  and/or between the plurality of multi-bars  261  and the second magnet  296 . According to an embodiment, the shielding member  2911  may prevent and/or reduce external foreign substances (e.g., metal dust) affected by the magnetic force of the at least one first magnet  291  and the at least one second magnet  292  from sticking to the electronic device  200 . 
       FIG.  11 B  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments, and  FIG.  11 C  is a partial cross-sectional view of an electronic device including a friction reducing structure according to various embodiments. 
     In the description of the electronic device  200  of  FIGS.  11 B and  11 C , the same reference numerals are assigned to components that are substantially the same as those of the electronic device  200  of  FIG.  11 A , and detailed descriptions thereof may not be repeated here. 
     Referring to  FIG.  11 B , the electronic device  200  may include the friction reducing structure  290 - 1  disposed between the cover part  2112  of the side cover  211  and the flexible display  230  and/or the bendable member  260 . According to an embodiment, the friction reducing structure  290 - 1  may include the first magnet  295  disposed to face at least a part of the plurality of multi-bars  261  at the cover part  2112 , and the second magnet  296  disposed on the plurality of multi-bars  261  to face the first magnet  295  at the cover part  2112 . 
     According to various embodiments, when the flexible display  230  is viewed from above, the first magnet  295  and the second magnet  296  may be arranged to at least partially overlap with the flexible display  230 . In this case, the sweeper  2113  may be disposed between the first magnet  295  and the flexible display  230 . According to an embodiment, the overlapping area where the flexible display  230  overlaps the first magnet  295  and the second magnet  296  may include an inactive area (e.g., black matrix (BM) area). 
     Referring to  FIG.  11 B , the electronic device  200  may include the friction reducing structure  290 - 1  disposed between the cover part  2112  of the side cover  211  and the flexible display  230 . According to an embodiment, the friction reducing structure  290 - 1  may include the first magnet  295  disposed to face at least a part of the plurality of multi-bars  261  at the cover part  2112 , and the second magnet  296  disposed at the edge of the flexible display  230  to face the first magnet  295  at the cover part  2112 . 
     According to various embodiments, when the flexible display  230  is viewed from above, the first magnet  295  and the second magnet  296  may be arranged to overlap with the flexible display  230 . In this case, the sweeper  2113  may be disposed between the cover part  2112  and the flexible display  230 . According to an embodiment, the overlapping area where the flexible display  230  overlaps the first magnet  295 , the second magnet  296 , and the sweeper  2113  may include an inactive area (e.g., black matrix (BM) area). 
       FIG.  12 A  is a perspective view illustrating an example slide structure including a bendable member, according to various embodiments.  FIG.  12 B  is a cross-sectional view illustrating an example slide-in state of an electronic device including a friction reducing structure according to various embodiments, and  FIG.  12 C  is a cross-sectional view illustrating an example slide-out state of an electronic device including a friction reducing structure according to various embodiments. 
     Referring to  FIGS.  12 A,  12 B and  12 C , the electronic device  200  may include the housing  210 , and the slide structure  250  disposed to be movable from the housing  210  by a predetermined reciprocating distance in the first direction (direction ①). According to an embodiment, the electronic device  200  may include a friction reducing structure  290 - 2  for providing tension and reducing the frictional resistance generated by the contact between the inner surface of the housing  210  and the flexible display  230  due to the drooping deformation of the flexible display  230  in the inner space of the housing  210  during the slide in/out operation. According to an embodiment, the friction reducing structure  290 - 2  may include a first magnet  297  disposed in the inner space of the housing  210 , and a second magnet  298  disposed between layers among stacked layers of the flexible display  230  or on the outer surface of the flexible display  230 . According to an embodiment, the first magnet  297  may be disposed in a manner to be attached in the form of a sheet to the inner surface of the cover member  221 . According to an embodiment, the friction reducing structure  290 - 2  may further include a shielding member  2971  disposed between the first magnet  297  and the cover member  221 . According to an embodiment, the second magnet  298  may be disposed in an area corresponding to the bendable member  260  received in the inner space of the housing  210  during operation of the electronic device  200 . 
     According to various embodiments, the flexible display  230  may include: a window layer  231 ; a polarizing layer  232  sequentially disposed under the window layer  231 ; a display panel  233 ; a functional layer  234 ; and a metal sheet layer  235 . According to an embodiment, the window layer  231  may include a polymer layer (e.g., PI or TPU) and/or a glass layer (e.g., ultra-thin glass (UTG)). According to an embodiment, the display panel  233  may include a plurality of pixels and a wiring structure (e.g., electrode pattern). According to an embodiment, the polarizing layer  232  may selectively pass light generated from a light source of the display panel  233  and vibrating in a certain direction. According to an embodiment, the display panel  233  and the polarizing layer  232  may be integrally formed with each other. According to an embodiment, the functional layer  234  may include a buffer layer for background demonstration and buffering, a graphite sheet for heat dissipation, an added display, a force touch FPCB, a fingerprint sensor FPCB, a communication antenna radiator, a digitizer, or a conductive/non-conductive tape. According to an embodiment, the metal sheet layer  235  may be disposed to provide flexural properties and rigidity to the flexible display  230 . According to an embodiment, the second magnet  298  may be disposed under the display panel  233 . According to an embodiment, the second magnet  298  may be disposed between the display panel  233  and the metal sheet layer  235 . For example, the second magnet  298  may be disposed on various layers of the flexible display  230 , through which a magnetic force can be transmitted through the display panel  233  and the window layer  231 . In this case, the second magnet  298  may be formed of a thin film magnetized metal sheet. In various embodiments, the magnetized metal sheet may include a plurality of magnetized metal sheets spaced apart from each other at a predetermined interval. 
     According to various embodiments, when the electronic device  200  is operated in a slide-in state and/or in a slide-out state from the slide-in state, the repulsive force may be generated through the second magnet  298  disposed such that, in connection with the first magnet  297 , identical polarities face each other, and the flexible display  230  may be retained in a state where the same is pressed in the direction of the bendable member  260  through the repulsive force, so that a drooping phenomenon of the flexible display  230  may be prevented and/or reduced and frictional resistance may be reduced. 
       FIG.  13 A  is a diagram illustrating an electronic device including an example friction reducing structure according to various embodiments.  FIG.  13 B  is a partial perspective view of an example cover member according to various embodiments.  FIG.  13 C  is a partial perspective view of an electronic device including an example friction reducing structure according to various embodiments. 
     Referring to  FIGS.  13 A,  13 B and  13 C , an electronic device  300  (e.g., the electronic device  200  of  FIG.  2 A ) may include a housing  310  (e.g., the housing  210  of  FIG.  2 A ), and a slide structure  350  (e.g., the slide structure  250  of  FIG.  2 A ) disposed to be movable from the housing  310  by a predetermined reciprocating distance in the direction (direction ①). According to an embodiment, the housing may include a first side cover  311  (e.g., the second side cover  212  in  FIG.  2 A ) disposed to guide at least a part of the slide structure; and a second side cover  312  (e.g., the first side cover  211  of  FIG.  2 A ) disposed opposite to the first side cover  311 . According to an embodiment, the slide structure  350  may perform a sliding operation in the first direction (direction ①) through a guide structure formed through the first side cover  311  and the second side cover  312 . 
     According to various embodiments, the electronic device  300  may include a friction reducing structure  290 - 3  disposed between the first side cover  311  and the slide structure  350 . Although not shown, the friction reducing structure  290 - 3  may also be disposed substantially identically between the second side cover  312  and the slide structure  350 . According to an embodiment, the friction reducing structure  290 - 3  may include a first magnet  391  disposed on the inner side surface  3111  of the first side cover  311 ; a second magnet  392  disposed on the side surface  3511  of the slide structure  350  such that, in connection with the first magnet  391 , identical polarities face each other along a third direction (direction ③) perpendicular to the first direction (direction ①); a third magnet  393  disposed on the side surface  3511  of the slide structure  350  such that, in connection with the first magnet  391 , different polarities face each other in a slide-in state of the electronic device  300 ; and a fourth magnet  394  disposed on the side surface  3511  of the slide structure  350  such that, in connection with the first magnet  391 , different polarities face each other in a slide-out state of the electronic device  300 . 
     According to various embodiments, the arrangement structure of the magnets  391  and  393  arranged to have an attractive force between the first magnet  391  and the third magnet  393  may continuously maintain a slide-in state of the electronic device  300 . According to an embodiment, the arrangement structure of the magnets  391  and  394  arranged to have an attractive force between the first magnet  391  and the fourth magnet  394  may continuously maintain a slide-out state of the electronic device  300 . According to an embodiment, the arrangement structure of the magnets  391  and  392  arranged to have a repulsive force between the first magnet  391  and the second magnet  392  may reduce the frictional resistance between the inner side surface  3111  of the side cover  311  and the side surface  3511  of the slide structure  350  during the sliding operation of the electronic device  300 , thereby allowing a smooth sliding operation. In various embodiments, the first magnet  391  may also include a plurality of magnets arranged at a predetermined interval. In various embodiments, the arrangement structure of the first magnet  391  and the arrangement structure of the second, third, and fourth magnets  392 ,  393  and  394  may also be interchanged with each other. For example, the first magnet  391  may be disposed on the side surface  3511  of the slide structure  350 , and the second, third, and fourth magnets  392 ,  393 , and  394  may be arranged on the inner side surface  3111  of the first side cover  311 . 
       FIG.  14 A  is a diagram illustrating an example arrangement position of a friction reducing structure with respect to an operation of an electronic device according to various embodiments,  FIG.  14 B  is a diagram illustrating an example arrangement position of a friction reducing structure with respect to an operation of an electronic device according to various embodiments, and  FIG.  14 C  is a diagram illustrating an example arrangement position of a friction reducing structure with respect to an operation of an electronic device according to various embodiments. 
     Referring to  FIG.  14 A , when the electronic device  300  is in a slide-in state, the first magnet  391  may be positioned to face the third magnet  393 . In this case, the first magnet  391  and the third magnet  393  may be arranged such that different polarities face each other, so that the slide structure  350  may be continuously retained in the slide-in state through an attractive force by the two magnets  391  and  393 . 
     Referring to  FIG.  14 B , when the electronic device  300  is in an intermediate state for transitioning from a slide-in state to a slide-out state, the first magnet  391  may be positioned to face the second magnet  392 . In this case, the first magnet  391  and the second magnet  392  may be arranged such that identical polarities face each other, so that the frictional resistance between the side surface  3511  of the slide structure  350  and the inner side surface  3111  of the first side cover  311  may be reduced through the repulsive force by the two magnets  391  and  392 , thereby allowing a smooth sliding operation. 
     Referring to  FIG.  14 C , when the electronic device  300  is in a slide-out state, the first magnet  391  may be positioned to face the fourth magnet  394 . In this case, the first magnet  391  and the fourth magnet  394  may be arranged such that different polarities face each other, so that the slide structure  350  may be continuously retained in the slide-out state through attractive force by the two magnets  391  and  394 . 
       FIG.  15    is a partial cross-sectional view of an electronic device including an example friction reducing structure according to various embodiments. 
     Referring to  FIG.  15   , the friction reducing structure  290 - 3  may include a screw  396  that replaces the third magnet  393  and the fourth magnet  394  in the friction reducing structure  290 - 3  of  FIG.  14 A . According to an embodiment, the screw  396  may be formed of a metal material that is affected by the magnetic force of the first magnet. According to an embodiment, the screw  396  may be disposed to couple one structure to another structure in the electronic device. Accordingly, the slide structure  350  may be continuously retained in the slide-in state and the slide-out state through the screw  396  that is affected by the magnetic force of the first magnet  391 . 
     In the electronic device according to example embodiments, at least one magnet may be disposed on a guide structure between a housing and a slide structure, and a friction reducing structure for assisting the sliding operation a magnetic force (e.g., repulsive force) of the magnet may be provided on the guide structure to induce the reduction in a frictional force generated in the guide structure, thereby improving the sliding feeling and maintaining operational reliability even when the electronic device is used for a long period of time. In addition, lifting of a flexible display, occurring during a slide in/out operation, can be prevented and/or reduced using the magnetic force of the magnet. 
     According to various example embodiments, an electronic device (e.g., the electronic device  200  of  FIG.  2 A ) may include: a housing including an inner space (e.g., the housing  210  of  FIG.  2 A ); a slide structure including a reciprocating slide (e.g., the slide structure  250  of  FIG.  2 A ) configured to be slidable from the housing by a predetermined reciprocating distance along a first direction (e.g., direction ① of  FIG.  2 B ); a flexible display (e.g., the flexible display  230  of  FIG.  2 A ) at least partially supported by the slide structure and received in the inner space to be at least partially invisible from the outside in a slide-in state; and a first friction reducing structure (e.g., the friction reducing structure  290  of  FIG.  6 A ) disposed between the housing and the slide structure. The first friction reducing structure may include: a guide slit (e.g., the guide slit  2111  of  FIG.  6 A ) disposed in a direction parallel to the first direction and having a predetermined length in the housing; a guide protrusion (e.g., the guide protrusion  253  of  FIG.  6 A ) configured to be guided by the guide slit in the slide structure; at least one first magnet (e.g., the first magnet  291  of  FIG.  6 A ) disposed on the guide slit; and at least one second magnet (e.g., the second magnet  292  of  FIG.  6 A ) disposed on the guide protrusion at a position affected by the magnetic force of the first magnet. The at least one first magnet and the at least one second magnet may be arranged having identical polarities at least partially facing face each other along a second direction (e.g., direction ② of  FIG.  6 A ) perpendicular to the first direction. 
     According to various example embodiments, the at least one first magnet may be disposed on each of an upper inner surface and a lower inner surface of the guide slit, with the guide protrusion and the at least one second magnet interposed therebetween. 
     According to various example embodiments, the at least one first magnet may have a length substantially equal to the length of the guide slit. 
     According to various example embodiments, the at least one first magnet may include a plurality of magnets arranged at predetermined intervals. 
     According to various example embodiments, the at least one first magnet may be disposed to substantially surround the guide protrusion and the at least one second magnet. 
     According to various example embodiments, the electronic device may further include a shielding member comprising a shielding material disposed between the guide slit and the at least one first magnet. 
     According to various example embodiments, the electronic device may further include a bendable support connected to the slide structure to be disposed to support at least a part of the flexible display. The bendable support may be received in the inner space in the slide-in state and may be configured to slide out from the inner space to form a plane substantially the same as that of the slide structure. 
     According to various example embodiments, the electronic device may include a second friction reducing structure disposed between the housing and the bendable member, the second friction reducing structure including at least one third magnet disposed in the housing, and at least one fourth magnet disposed on the bendable support. The at least one third magnet and the at least one fourth magnet may be arranged having identical polarities at least partially facing each other, along the second direction. 
     According to various example embodiments, the housing may include a cover portion at least partially overlapping the bendable support and the flexible display when the flexible display is viewed from above. The at least one third magnet and the at least one fourth magnet may be arranged between the cover portion and the bendable support. 
     According to various example embodiments, at least a part of the flexible display may be disposed between the at least one third magnet and the at least one fourth magnet. 
     According to various example embodiments, the electronic device may further include a sweeper disposed between the at least one third magnet and the flexible display. 
     According to various example embodiments, the at least one fourth magnet may be mounted in a recess positioned lower than an outer surface supporting the flexible display provided on the bendable support, and the at least one fourth magnet and the flexible display may form the same planes. 
     According to various example embodiments, the electronic device may further include a sweeper disposed between the cover part and the flexible display. 
     According to various example embodiments, the electronic device may further include a shielding member comprising a shielding material disposed between the cover portion and the at least one third magnet, and/or between the bendable support and the at least one fourth magnet. 
     According to various example embodiments, the electronic device may include a third friction reducing structure disposed in the inner space between the bendable support and the housing, the third friction reducing structure including at least one fifth magnet disposed in the inner space of the housing, and at least one sixth magnet provided between the flexible display and the bendable support. In the slide-in state, the at least one fifth magnet and the at least one sixth magnet may have identical polarities at least partially facing each other along the second direction. 
     According to various example embodiments, the flexible display may include a display panel, and the at least one sixth magnet may include at least one magnetized metal sheet at least partially attached to a rear surface of the display panel. 
     According to various example embodiments, the electronic device may further include a shielding member comprising a shielding material disposed between the at least one fifth magnet and the housing. 
     According to various example embodiments, the electronic device may include a seventh magnet disposed in the guide slit facing the at least one second magnet in the slide-in state, and an eighth magnet disposed in the guide slit facing the at least one second magnet in the slide-out state. The seventh magnet and the eighth magnet may be arranged , in connection with the at least one first magnet, to have different polarities at least partially facing each other. 
     According to various example embodiments, the bendable support may include a plurality of unit multi-bars coupled to be rotatable with respect to each other, and the at least one fourth magnet may be disposed on each of the plurality of unit multi-bars. 
     According to various example embodiments, the bendable support may include a plurality of unit multi-bars coupled to be rotatable with respect to each other, and the at least one fourth magnet may be disposed on unit multi-bars selected from the plurality of unit multi-bars. 
     While the disclosure has been illustrated and described with reference to various example embodiments, it will be understood that the various example embodiments are intended to be illustrative, not limiting. It will be further understood by those skilled in the art that various changes in form and detail may be made without departing from the true spirit and full scope of the disclosure including the appended claims and their equivalents.