Patent Description:
Electronic devices may refer to devices that are configured to perform specific functions according to installed programs. Such electronic devices may include, for example, home appliances, electronic wallets, portable multimedia players, mobile communication terminals, tablet PCs, video/audio devices, desktop/laptop computers, and/or vehicle navigation systems. The electronic devices may output stored information as sounds or images (e.g., motion pictures or still photos). In line with the high degree of integration of electronic devices and the widespread use of super-fast large-capacity wireless communication, it has recently become possible to equip a single electronic device (for example, mobile communication terminal) with certain functions. For example, not only a communication function, but also an entertainment function (for example, gaming), a multimedia function (for example, music/video playback), communication and security functions for mobile banking and the like, a scheduling function, and an electronic wallet function may be integrated into a single electronic device. Such electronic devices have become compact such that users can conveniently carry the same. <CIT> describes a foldable electronic device having a liftable and slidable input module. <CIT> describes an electronic device with a retractable one-foot pad structure.

Electronic devices (for example, laptops) having communication functions, such as portable terminals, have become compact and lightweight to maximize portability and convenience of users, and integrated components tend to be arranged in smaller spaces for high performance. When an electronic device (for example, a laptop) is unfolded, the display may be used to provide information to the user, and the electronic device, when not used, may be closed to be carried conveniently.

An electronic device may include a body part, a display part, a hinge module connected to the body part and the display part, and a foot structure configured to support the electronic device at a given position (e.g., an angled position) and to reduce the slipping of the body part relative to a surface on which the electronic device is placed. For example, when the body part is adjacent to the ground on which the electronic device is position, the amount of air flowing into the electronic device may be reduced. In addition, if the distance between the electronic device and the ground is increased by using an ergo lift hinge, the angle by which the body part can rotate with regard to the display part may be limited.

The foregoing section of this document introduces information about and/or from the art that may provide context for or be related to the subject matter described herein and/or claimed below. It provides background information to facilitate a better understanding of the certain aspects of the that which is claimed below. This is a discussion of "related" art. That such art is related in no way implies that it is also "prior" art. The related art may or may not be prior art. The discussion in this section of this document is to be read in this light, and not as admissions of prior art.

Certain embodiments of the disclosure may provide an electronic device capable of reducing the internal temperature of the electronic device and transferring heat generated by the electronic device to the outside of the electronic device.

Certain embodiments of the disclosure may provide a hinge module configured to connect a body part and a display part such that the same can rotate by <NUM>°.

According to certain embodiments of the disclosure, an electronic device includes a housing assembly including a first housing and a second housing configured to rotate with respect to the first housing around a first rotation axis, a hinge module that is coupled to the first housing and the second housing and includes a rotation gear configured to rotate around an axis substantially the same as or parallel to the first rotation axis, a gear assembly including a pinion gear rotatably connected to the rotation gear, wherein the pinion gear is configured to rotate around an axis parallel to the first rotation axis , a rack gear configured to slide in a first direction (+Y, -Y), based on rotation of the pinion gear, wherein the first axial direction is perpendicular to the first rotation axis, and a cam structure connected to the rack gear, and a foot structure coupled to the first housing, the foot structure being moveable in a second axial direction (+Z), perpendicular to the first rotation axis and the first axial direction, based on a first movement of the cam structure and moveable in a third axial direction (-Z), opposed to the second axial direction, based on a second movement of the cam structure.

According to certain embodiments of the disclosure, an electronic device includes a housing including a first housing and a second housing configured to rotate with respect to the first housing around a first rotation axis, a hinge module coupled to the first housing and the second housing and includes a rotation gear, a gear assembly including a pinion gear rotatably coupled to the rotation gear, a rack gear configured to slide based on rotation of the pinion gear, and a cam structure coupled to the rack gear, and a foot structure connected to the first housing, the foot structure including a foot structure holder including a protruding area configured to receive pressure provided from the cam structure, and a support area connected to the foot structure holder and configured to support the electronic device.

An electronic device according to certain embodiments of the disclosure may include a foot structure, the length of which is changed based on an angle between housings. The foot structure may increase the distance between the electronic device and the ground on which the electronic device is seated. For example, if the distance between the electronic device and the ground is increased, the flow rate of air flowing into the electronic device may increase, and radiant heat transferred from the ground to the electronic device may be reduced, thereby improving heat dissipation from the electronic device.

An electronic device according to certain embodiments of the disclosure may include a hinge module connected to housings. The electronic device may be rotated <NUM>° by using the hinge module, thereby improving user convenience.

These and other aspects of the disclosure are described hereinbelow with reference to the accompanying drawings.

<FIG> is a block diagram illustrating an electronic device in a network environment according to certain embodiments of the disclosure.

According to an embodiment, the electronic device <NUM> may include a processor <NUM>, memory <NUM>, an input module <NUM>, a sound output module <NUM>, a display module <NUM>, an audio module <NUM>, a sensor module <NUM>, an interface <NUM>, a connecting terminal <NUM>, a haptic module <NUM>, a camera module <NUM>, a power management module <NUM>, a battery <NUM>, a communication module <NUM>, a subscriber identification module (SIM) <NUM>, or an antenna module <NUM>. In some embodiments, at least one of the components (e.g., the connecting terminal <NUM>) may be omitted from the electronic device <NUM>, or one or more other components may be added in the electronic device <NUM>. In some embodiments, some of the components (e.g., the sensor module <NUM>, the camera module <NUM>, or the antenna module <NUM>) may be implemented as a single component (e.g., the display module <NUM>).

The auxiliary processor <NUM> may control, for example, at least some of functions or states related to at least one component (e.g., the display module <NUM>, the sensor module <NUM>, or the communication module <NUM>) among the components of the electronic device <NUM>, instead of the main processor <NUM> while the main processor <NUM> is in an inactive (e.g., sleep) state, or together with the main processor <NUM> while the main processor <NUM> is in an active (e.g., executing an application) state.

According to an embodiment, the audio module <NUM> may obtain the sound via the input module <NUM>, or output the sound via the sound output module <NUM> or an external electronic device (e.g., an electronic device <NUM> (e.g., a speaker or a headphone)) directly or wirelessly coupled with the electronic device <NUM>.

The interface <NUM> may support one or more specified protocols to be used for the electronic device <NUM> to be coupled with the external electronic device (e.g., the electronic device <NUM>) directly or wirelessly. According to an embodiment, the interface <NUM> 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.

The wireless communication module <NUM> may identify or authenticate the electronic device <NUM> in a communication network, such as the first network <NUM> or the second network <NUM>, using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module <NUM>.

According to an embodiment, the wireless communication module <NUM> may support a peak data rate (e.g., <NUM> Gbps or more) for implementing eMBB, loss coverage (e.g., <NUM> dB or less) for implementing mMTC, or U-plane latency (e.g., <NUM> or less for each of downlink (DL) and uplink (UL), or a round trip of <NUM> or less) for implementing URLLC.

According to an embodiment, the antenna module may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network <NUM> or the second network <NUM>, may be selected, for example, by the communication module <NUM> from the plurality of antennas.

According to certain embodiments, the antenna module <NUM> may form a mmWave antenna module. According to an embodiment, the mmWave antenna module may include a printed circuit board, an 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.

Each of the external electronic devices <NUM> or <NUM> may be a device of a same type as, or a different type, from the electronic device <NUM>.

The electronic device according to certain embodiments may be one of certain types of electronic devices.

It should be appreciated that certain embodiments of the disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include certain changes, equivalents, or replacements for a corresponding embodiment. 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), it means that the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element.

As used in connection with certain embodiments of the disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, and may interchangeably be used with other terms, for example, "logic", "logic block", "part", or "circuitry".

According to certain 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 certain embodiments, one or more of the above-described components or operations may be omitted, or one or more other components or operations may be added. In such a case, 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 certain 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> is a perspective view of an electronic device in a first state according to certain embodiments of the disclosure. <FIG> is a perspective view of an electronic device in a second state according to certain embodiments of the disclosure.

Referring to <FIG> and <FIG>, an electronic device <NUM> may include a housing <NUM> and a display <NUM>. According to an embodiment, the electronic device <NUM> may be, for example, a laptop computer, a notebook computer, or a portable terminal. The configuration of the electronic device <NUM> of <FIG> may be entirely or partially the same as the configuration of the electronic device <NUM> of <FIG>.

According to certain embodiments, the housing <NUM> may form at least a part of the exterior of the electronic device <NUM>, or may support a component (e.g., a display <NUM>) of the electronic device <NUM>. For example, the housing <NUM> may be configured to accommodate at least one of a display <NUM>, an input device <NUM>, or a touch pad <NUM>.

According to certain embodiments, the electronic device <NUM> may be opened or closed. For example, the housing <NUM> includes a first housing <NUM> and a second housing <NUM> configured to be rotatable with respect to the first housing <NUM>. According to an embodiment, the electronic device <NUM> includes at least one hinge module <NUM> that couples the first housing <NUM> and the second housing <NUM>.

According to certain embodiments, the first housing <NUM> may be configured to rotate within a designated angle range (e.g., <NUM> degree to <NUM> degrees) with respect to the second housing <NUM> by using the hinge module <NUM>. For example, the electronic device <NUM> may be configured to operate in a first state. As shown in <FIG>, for example, the first state may be a clamshell mode. In the first state, the angle , the first state may be otate within a designated angle range (e.g., <NUM> degree to <NUM> degrees) with respond housing <NUM> may be about <NUM> degrees to <NUM> degrees. In another example, the electronic device <NUM> may be configured to operate in a second state. For example, as shown in <FIG> the second state may be a tablet mode. In the second state, the angle vice <NUM> may be configured to operate egree to <NUM> degrees) with respond housing <NUM> may be about <NUM> degrees to <NUM> degrees. ng <NUM> by using the hinge module <NUM>. to the second housing <NUM> may be interpreted as the rotation of the second housing <NUM> with respect to the first housing <NUM>.

According to certain embodiments, the housing <NUM> may be formed of a metallic material or a non-metallic material having the rigidity of a selected size. According to an embodiment, at least a portion of the electronic device <NUM>, which is formed of the metal material, may be configured to provide a ground plane, and may be electrically coupled to a ground line formed on a printed circuit board (not shown). For example, the housing <NUM> may be electrically coupled to the printed circuit board via a capacitive component.

According to certain embodiments, the display <NUM> may be a flexible display, at least a portion of which can be transformed into a flat surface and/or a curved-surface. For example, the display <NUM> may be a foldable or a rollable display. The configuration of the display <NUM> may be entirely or partially the same as the configuration of the display module <NUM> of <FIG>. According to an embodiment, the display <NUM> may be configured to be accommodated in the second housing <NUM>. For example, at least a part of the display <NUM> may be disposed in the second housing <NUM>. According to an embodiment, at least a part of the display <NUM> may be visually exposed to the outside of the electronic device <NUM>. According to an embodiment, the second housing <NUM> may be interpreted as a display part.

According to certain embodiments, the display <NUM> may be coupled to or may be disposed adjacent to a touch detection circuit, a pressure sensor capable of measuring the intensity (pressure) of touch, and/or a digitizer configured to detect a stylus pen of a magnetic field type.

According to certain embodiments, the electronic device <NUM> may include the input device <NUM> capable of detecting a user input (e.g., a pressure). According to an embodiment, the input device <NUM> may be configured to be accommodated in the first housing <NUM>. For example, the input device <NUM> may be disposed on the first housing <NUM>. According to an embodiment, in a state in which the electronic device <NUM> is closed, the input device <NUM> may have at least a part configured to face at least a part of the display <NUM>. The configuration of the input device <NUM> of <FIG> may be entirely or partially the same as the configuration of the input module <NUM> of <FIG>. For example, the input device <NUM> may be a keyboard. According to an embodiment, the first housing <NUM> may be interpreted as a body part.

According to certain embodiments, the electronic device <NUM> may include the touch pad <NUM> configured to detect or receive a user input. According to an embodiment, the touch pad <NUM> may include a capacitive touch sensor, a touch sensor based on resistive sensing, an optical touch sensor, and/or a surface acoustic wave touch sensor. For example, the touch pad <NUM> may be configured to detect current, pressure, light, and/or vibration caused by an input applied to the touch pad <NUM> by a user, and a processor (e.g., the processor <NUM> of <FIG>) and/or the touch pad <NUM> may be configured to determine a user input, based on changes in the detected current, pressure, light, and/or vibration. According to an embodiment, the touch pad <NUM> may include a display. For example, the touch pad <NUM> may include a pressure-sensitive touch screen, a capacitive touch screen, and/or an infrared touch screen.

According to certain embodiments, the processor <NUM> and/or the touch pad <NUM> may be configured to determine an input position (e.g., an XY coordinates) by a user. According to an embodiment, the touch pad <NUM> may be configured to detect the pressure to the touch pad <NUM>. For example, the touch pad <NUM> may be configured to detect a force in the thickness direction thereof (e.g., the Z-axis direction) by using a switch member (not shown) and at least one force sensor (not shown). According to an embodiment, the touch pad <NUM> may be configured to detect an external object (e.g., a user's finger or a stylus) when the external object directly touches or closely approaches the surface of the touch pad <NUM>.

According to certain embodiments, the touch pad <NUM> may be configured to be accommodated in the first housing <NUM>. For example, the touch pad <NUM> may be coupled to the first housing <NUM>, and may have at least one part that is exposed to the outside of the first housing <NUM>.

According to an embodiment, the touch pad <NUM> may be configured to be adjacent to the input device <NUM>. According to an embodiment, in a state in which the electronic device <NUM> is closed, the touch pad <NUM> may have at least one part that is configured to face the display <NUM>. The configuration of the touch pad <NUM> may be entirely or partially the same as the configuration of the input module <NUM> of <FIG>.

<FIG> and <FIG> are views illustrating the internal structure of an electronic device in a first state according to certain embodiments of the disclosure.

Referring to <FIG> and/or <FIG>, an electronic device <NUM> includes a first housing <NUM>, a second housing <NUM>, a hinge module <NUM>, a gear assembly <NUM>, and a foot structure <NUM>. The configuration of the first housing <NUM>, the second housing <NUM>, and the hinge module <NUM> of <FIG> and/or <FIG> may be entirely or partially the same as the configuration of the first housing <NUM>, the second housing <NUM>, and the hinge module <NUM> of <FIG> and/or <FIG>.

According to certain embodiments, the first housing <NUM> may include at least one through-hole <NUM>. According to an embodiment, the air inside the electronic device <NUM> may be discharged to the outside of the electronic device <NUM> through the through-hole <NUM>. For example, air heated by a component (e.g., the processor <NUM> of <FIG>) of the electronic device <NUM> may be delivered to the outside of the electronic device <NUM>. According to an embodiment, the through-hole <NUM> may extend through the first front surface 210a and the first rear surface 210b of the first housing <NUM>. According to an embodiment, the foot structure <NUM> may raise at least a part (e.g., the first housing <NUM>) of the electronic device <NUM>. According to an embodiment, when the distance between the first housing <NUM> and the ground is increased by the foot structure <NUM>, the amount of air outside the electronic device <NUM>, which is delivered to the through-hole <NUM>, may be increased. According to an embodiment, the foot structure <NUM> may be interpreted as a thermal foot structure.

According to certain embodiments, the hinge module <NUM> may be configured to connect the first housing <NUM> and the second housing <NUM>. For example, the hinge module <NUM> may include a first rotation gear <NUM> connected to the first housing <NUM> and a second rotation gear <NUM> connected to the second housing <NUM>. According to an embodiment, the second rotation gear <NUM> may be connected to the second housing <NUM>, and the first rotation gear <NUM> may be rotatably connected to the second rotation gear <NUM>. According to an embodiment, the hinge module <NUM> may include multiple idle gears <NUM> rotatably connected to the first rotation gear <NUM> and the second rotation gear <NUM>. According to an embodiment, the first rotation gear <NUM> may be configured to rotate around a first rotation axis Ax1. The second rotation gear <NUM> may be configured to rotate around a second rotation axis Ax2 substantially parallel to the first rotation axis Ax1. According to an embodiment, the first rotation gear <NUM> may include a (<NUM>-<NUM>)st rotation gear 321a configured to engage with the second rotation gear <NUM> and/or the idle gears <NUM>, and (<NUM>-<NUM>)nd rotation gear 321b disposed parallel to the (<NUM>-<NUM>)st rotation gear 321a. According to an embodiment, the (<NUM>-<NUM>)nd rotation gear 321b may be configured to engage with at least a part (e.g., the pinion gear <NUM> of <FIG>) of the gear assembly <NUM>.

According to certain embodiments, the hinge module <NUM> may include a hinge shaft <NUM>. According to an embodiment, the hinge shaft <NUM> may provide a force or pressure, which allows the first housing <NUM> to be maintained at a designated angle with respect to the second housing <NUM>, to a rotation gear <NUM> and/or a shaft (the shaft <NUM> of <FIG>). For example, the hinge shaft <NUM> may be interpreted as a detent structure. According to an embodiment, the hinge shaft <NUM> may be disposed in the first housing <NUM>. According to an embodiment, the hinge shaft <NUM> may be disposed on substantially the same axis (e.g., the first rotation axis Ax1) as that of the first rotation gear <NUM>.

According to certain embodiments, the hinge module <NUM> may include a hinge cover <NUM>. According to an embodiment, the hinge cover <NUM> may be configured to surround at least a part of the rotation gear <NUM>. According to an embodiment, the hinge cover <NUM> may have at least a part formed in a closed curve shape. According to an embodiment, at least a part of the hinge cover <NUM> may be visually exposed to the outside of the electronic device <NUM>.

According to certain embodiments, the hinge module <NUM> may include multiple hinge modules 300a and 300b. For example, the hinge module <NUM> may include a first hinge module 300a and a second hinge module 300b that is disposed in a line with the first hinge module 300a.

According to certain embodiments, the gear assembly <NUM> may be configured to transmit a rotation force of the hinge module <NUM> to the foot structure <NUM>. According to an embodiment, when the second housing <NUM> rotates with respect to the first housing <NUM>, the rotation gear <NUM> of the hinge module <NUM> may rotate. The gear assembly <NUM> may be connected to the rotation gear <NUM>, and may be configured to move based on rotation of the rotation gear <NUM>. For example, the gear assembly <NUM> may include a pinion gear <NUM> rotatably connected to the second rotation gear 321b of the hinge module <NUM>. According to an embodiment, based on a movement of the gear assembly <NUM>, a force (or pressure) may be transmitted to the foot structure <NUM>. For example, a part (e.g., the plate <NUM> of <FIG>) of the gear assembly <NUM> may be configured to slide and move based on rotation of the pinion gear <NUM>. Pressure may be transmitted to the foot structure <NUM> by a slide movement of the gear assembly <NUM>. According to an embodiment, the gear assembly <NUM> may be disposed in the first housing <NUM>.

According to certain embodiments, the gear assembly <NUM> may include multiple gear assemblies 400a and 400b. For example, the gear assembly <NUM> may include a first gear assembly 400a connected to the first hinge module 300a and a second gear assembly 400b connected to the second hinge module 300b. According to an embodiment, the first gear assembly 400a and the second gear assembly 400b may be arranged in a line.

According to certain embodiments, the foot structure <NUM> may be configured to reduce or prevent a slip of the electronic device <NUM>. According to an embodiment, the foot structure <NUM> may have at least a part configured to protrude from the first housing <NUM>. According to an embodiment, the foot structure <NUM> may include a support area <NUM> configured to be in contact with the outside (e.g., the ground) of the electronic device <NUM>. The support area <NUM> may be configured to support the electronic device <NUM>. According to an embodiment, the support area <NUM> may have a friction coefficient higher than that of the housing <NUM>. For example, the support area <NUM> may include rubber or a polymer or the like with similar elastic and/or impact absorbing properties.

According to certain embodiments, the foot structure <NUM> may include a guide member <NUM> configured to surround at least a part (e.g., the plate <NUM>) of the gear assembly <NUM>. According to an embodiment, the guide member <NUM> may be configured to guide a movement of the plate <NUM>.

According to certain embodiments, the foot structure <NUM> is connected to the first housing <NUM>. For example, the foot structure <NUM> may include at least one fastening member <NUM>. The fastening member <NUM> may be connected to the first housing <NUM> and the guide member <NUM>. According to an embodiment, the fastening member <NUM> may include a screw structure or a boss structure.

According to certain embodiments, the foot structure <NUM> may include multiple foot structures 500a and 500b. For example, the foot structure <NUM> may include a first foot structure 500a connected to the first gear assembly 400a and a second foot structure 500b connected to the second gear assembly 400b. According to an embodiment, the first foot structure 500a and the second foot structure 500b may be arranged in a line.

<FIG> is a schematic view of an electronic device according to certain embodiments of the disclosure. <FIG> is an exploded perspective view of a hinge module, a gear assembly, and a foot structure according to certain embodiments of the disclosure.

Referring to <FIG> and/or <FIG>, an electronic device <NUM> includes a hinge module <NUM>, a gear assembly <NUM>, and a foot structure <NUM>. The configuration of the hinge module <NUM>, the gear assembly <NUM>, and the foot structure <NUM> of <FIG> and/or <FIG> may be entirely or partially the same as the configuration of the hinge module <NUM>, the gear assembly <NUM>, and the foot structure <NUM> of <FIG> and/or <FIG>.

According to certain embodiments, the hinge module <NUM> may include a first rotation gear <NUM>, a second rotation gear <NUM>, multiple idle gears <NUM>, a hinge shaft <NUM>, and a hinge cover <NUM>. The configuration of the first rotation gear <NUM>, the second rotation gear <NUM>, the multiple idle gears <NUM>, the hinge shaft <NUM> and the hinge cover <NUM> of <FIG> and/or <FIG> may be entirely or partially the same as the configuration of the first rotation gear <NUM>, the second rotation gear <NUM>, the multiple idle gears <NUM>, the hinge shaft <NUM>, and the hinge cover <NUM> of <FIG> and/or <FIG>.

According to certain embodiments, the rotation gear <NUM> (e.g., the (<NUM>-<NUM>)nd rotation gear 321b) may include a first gear area <NUM> and a second gear area <NUM>. According to an embodiment, the first gear area <NUM> may include a first curved-surface 311a and first gear teeth 311b configured to extend or protrude from the first curved-surface 311a. The second gear area <NUM> may include a second curved-surface 313a configured to extend from the first curved-surface 311a. For example, a portion of the rotation gear <NUM>, in which gear teeth (e.g., the first gear teeth 311b) are not positioned, may be interpreted as the second gear area <NUM>. According to an embodiment, the first curved-surface 311a and the second curved-surface 313a may form a substantially circular curved-surface. According to an embodiment, the first gear teeth 311b and the second curved-surface 313a may be configured to be visually exposed to the outside of the rotation gear <NUM>.

According to certain embodiments, the rotation gear <NUM> (e.g., the second rotation gear 321b) may be formed as one gear area (not shown). For example, the first gear area <NUM> and the second gear area <NUM> of the rotation gear <NUM> may be integrally formed. According to certain embodiments, a pinion gear <NUM> may include a first pinion gear <NUM>. According to an embodiment, the first pinion gear <NUM> may be configured to engage with the rotation gear <NUM> (e.g., the second gear 321b). For example, the first pinion gear <NUM> may be configured to rotate based on rotation of the rotation gear <NUM>. According to an embodiment, when the first pinion gear <NUM> faces or contacts the first gear area <NUM>, the first pinion gear <NUM> may be configured to receive torque transmitted from the rotation gear <NUM>. For example, when the first pinion gear <NUM> faces or contacts the first gear area <NUM>, based on a movement of a housing (e.g., the housing <NUM> of <FIG>), the first pinion gear <NUM> may be configured to rotate. For example, when the rotation gear <NUM> rotates, the first pinion gear <NUM> may be configured to rotate in the reverse direction of the rotation direction of the rotation gear <NUM>. According to an embodiment, when the first pinion gear <NUM> faces or contacts the second gear area <NUM>, the first pinion gear <NUM> may be configured such that torque by rotation gear <NUM> is not transmitted thereto. For example, when the first pinion gear <NUM> faces or contacts the second gear area <NUM>, the first pinion gear <NUM> may be configured not to rotate. For example, when the rotation gear <NUM> rotates, the first pinion gear <NUM> may be configured not to rotate.

According to certain embodiments, the pinion gear <NUM> may include a second pinion gear <NUM>. According to an embodiment, the second pinion gear <NUM> may be configured to rotate around substantially the same axis as that of the first pinion gear <NUM>. For example, the second pinion gear <NUM> may be connected to the first pinion gear <NUM> by using a shaft <NUM>. According to an embodiment, when the first pinion gear <NUM> rotates, the second pinion gear <NUM> may be configured to rotate in the same direction as the first pinion gear <NUM>. According to an embodiment, the second pinion gear <NUM> may be disposed parallel to the first pinion gear <NUM>. According to an embodiment, the second pinion gear <NUM> may be configured to engage with a rack gear <NUM>.

According to certain embodiments, the gear assembly <NUM> may include the rack gear <NUM>. According to an embodiment, the rack gear <NUM> may be configured to engage with the pinion gear <NUM> (e.g., the second pinion gear <NUM>). For example, the rack gear <NUM> may be configured to slide based on rotation of the pinion gear <NUM>, e.g., the linear movement of the rack gear <NUM> may correspond to the rotation of the pinion gear <NUM> to which it is operatively engaged. For example, the rack gear <NUM> may be configured to slide and move in a first direction (e.g., the x-axis direction). According to an embodiment, when the pinion gear <NUM> (e.g., the first pinion gear <NUM>) contacts the first gear area <NUM> of the rotation gear <NUM>, the rack gear <NUM> may be configured to move based on rotation of the rotation gear <NUM>. According to an embodiment, when the pinion gear <NUM> (e.g., the first pinion gear <NUM>) faces the second gear area <NUM> of the rotation gear <NUM>, the rack gear <NUM> may be configured not to move even though the rotation gear <NUM> rotates. According to an embodiment (not shown), the rack gear <NUM> may be formed in a track shape. For example, the rack gear <NUM> may be formed in a caterpillar track shape.

According to certain embodiments, the gear assembly <NUM> may include a plate <NUM>. According to an embodiment, the plate <NUM> may include a first surface 440a and a second surface 440b opposite to the first surface 440a. According to an embodiment, the rack gear <NUM> may be positioned above (e.g., the + Z-direction) the plate <NUM>. For example, the rack gear <NUM> may be positioned on the first surface 440a of the plate <NUM>. As another example, the rack gear <NUM> may be integrally formed with the plate <NUM>, and may be a portion of the plate <NUM>, which protrudes from the first surface 440a of the plate <NUM> in a second direction (e.g., the + Z-direction).

According to certain embodiments, the gear assembly <NUM> includes a cam structure <NUM>. According to an embodiment, the cam structure <NUM> is connected to the rack gear <NUM> and/or may be connected to the plate <NUM>. For example, the cam structure <NUM> is configured to slide and move based on rotation of the pinion gear <NUM> in the first direction (the x-axis direction) together with the rack gear <NUM> and/or may be connected to plate <NUM>. According to an embodiment, the cam structure <NUM> may be positioned below (e.g., the - Z-direction) the plate <NUM>. For example, the cam structure <NUM> may be disposed on the second surface 440b of the plate <NUM>. As another example, the cam structure <NUM> may be a portion of the plate <NUM>, which protrudes from the second surface 440b of the plate <NUM> in a third direction (the - Z-direction).

According to certain embodiments, the cam structure <NUM> may be configured to transmit a pressure or force to the foot structure <NUM>. For example, the cam structure <NUM> may be configured to face or touch at least a part (e.g., the protruding area <NUM>) of the foot structure <NUM>. According to an embodiment, when the rack gear <NUM> and/or the cam structure <NUM> slide and move in the first direction, the cam structure <NUM> may be configured to transmit a force to the protruding area <NUM> in a second direction (the + Z-direction) or the third direction (the - Z-direction). According to an embodiment, a lubricating material (e.g., a lubricating oil and/or a lubricating agent) may be placed between the cam structure <NUM> and the protruding area <NUM>. The lubricating material may have a friction coefficient lower than the friction coefficient of the cam structure <NUM> and/or the protruding area <NUM> such that the lubricating material reduces the friction between the parts.

According to certain embodiments, the foot structure <NUM> may be configured to adjust a height of the electronic device <NUM>. According to an embodiment, based on the force or pressure transmitted from the cam structure <NUM>, the foot structure <NUM> may be configured to move in the second direction (the + Z-direction) or the third direction (the - Z-direction) with respect to the first housing <NUM>. According to an embodiment, as the distance between the first rear surface 210b of the first housing <NUM> and a space (e.g., the ground) in which the electronic device <NUM> is seated, the heat dissipation effect of the electronic device <NUM> may be increased.

According to certain embodiments, the foot structure <NUM> may include an elastic member <NUM>, a guide member <NUM>, and a fastening member <NUM>. The configuration of the elastic member <NUM>, the guide member <NUM>, and the fastening member <NUM> of <FIG> and/or <FIG> may be entirely or partially the same as the configuration of the elastic member <NUM>, the guide member <NUM>, and the fastening member <NUM> of <FIG> and/or <FIG>.

According to certain embodiments, the foot structure <NUM> may include a foot structure holder <NUM>. According to an embodiment, the foot structure holder <NUM> may include a protruding area <NUM> configured to face at least a part of the cam structure <NUM>. According to an embodiment, the protruding area <NUM> may be configured to receive the force or pressure transmitted from the cam structure <NUM>. For example, based on a sliding movement of the cam structure <NUM>, the protruding area <NUM> may be configured to receive a force in the third direction (the - Z-direction). According to an embodiment, the protruding area <NUM> may include a third inclined surface 511a, a fourth inclined surface 511b, and a second flat surface 511c positioned between the third inclined surface 511a and the fourth inclined surface 511b.

According to certain embodiments, the foot structure holder <NUM> may include a wing part <NUM> configured to face the elastic member <NUM>. According to an embodiment, the wing part <NUM> may be configured to extend in the first direction (e.g., the x-axis direction) from the protruding area <NUM>. According to an embodiment, the wing part <NUM> may be formed integrally with the protruding area <NUM>. According to an embodiment, the wing part <NUM> may be configured to receive an elastic force in the second direction (the + Z-direction) from the elastic member <NUM>.

According to certain embodiments, the foot structure holder <NUM> may include an accommodation area <NUM>. According to an embodiment, the accommodation area <NUM> may be configured to accommodate at least a part of the support area <NUM>. According to an embodiment, the accommodation area <NUM> may be interpreted as an empty space or a groove formed below (e.g., the - Z-direction) of the foot structure holder <NUM>.

According to certain embodiments, the foot structure <NUM> may include the elastic member <NUM>. According to an embodiment, the elastic member <NUM> may be disposed between the first housing <NUM> and the wing part <NUM>. For example, the elastic member <NUM> may be connected to the first housing <NUM> and the wing part <NUM>. According to an embodiment, the elastic member <NUM> may be compressed by the force or pressure transmitted from the cam structure <NUM> of the gear assembly <NUM>. The elastic member <NUM> may be formed of a material having elastic properties (e.g., a rubber or rubber-like material). For example, when the protruding area <NUM> of the foot structure <NUM> receives a force or pressure by the cam structure <NUM>, the elastic member <NUM> may be compressed, and the foot structure holder <NUM> and/or the support area <NUM> may be moved in the third direction (the - Z-direction). According to an embodiment, when the cam structure <NUM> of the gear assembly <NUM> is spaced apart from the protruding area <NUM> of the foot structure <NUM>, the elastic member <NUM> may be configured to provide an elastic force to the foot structure holder <NUM> in the second direction (the + Z-direction). The foot structure holder <NUM> and/or the support area <NUM> may be configured to move in the second direction (the + Z-direction). According to an embodiment, due to the sliding movement of the cam structure <NUM>, when the force transmitted in the third direction - Z with respect to the foot structure holder <NUM> is greater than the elastic force transmitted from the elastic member <NUM> to the foot structure holder <NUM>, the cam structure <NUM> may be configured to move with respect to the foot structure holder <NUM>. According to an embodiment, to reduce the user's force required for rotation of the electronic device <NUM>, the elastic member <NUM> may be designed to have an elastic force smaller than a designated value.

According to certain embodiments, the foot structure <NUM> may include a guide member <NUM>. According to an embodiment, the guide member <NUM> may include an accommodation groove <NUM>. According to an embodiment, the accommodation groove <NUM> may be configured to accommodate at least a part (e.g., the rack gear <NUM> and/or the plate <NUM>) of the gear assembly <NUM>. According to an embodiment, the accommodation groove <NUM> may be configured to guide a movement of the plate <NUM> in the first direction (the x-axis direction). For example, the accommodation groove <NUM> may be a groove formed on the inner surface of the guide member <NUM> along the first direction (the x-axis direction). According to an embodiment, the guide member <NUM> may be connected or fixed or otherwise coupled to the first housing <NUM> by using at least one fastening member <NUM>.

According to certain embodiments, the foot structure <NUM> may include the support area <NUM>. According to an embodiment, the support area <NUM> may be fastened to the foot structure holder <NUM>. For example, the support area <NUM> may include a hook structure <NUM>. The hook structure <NUM> may be fastened to the inner surface of the accommodation area <NUM>. According to an embodiment, the support area <NUM> may be configured to be interference fit to the foot structure holder <NUM>. According to an embodiment, the support area <NUM> may include an elastic body (e.g., rubber).

<FIG> are views illustrating a foot structure configured to move based on an angle between a first housing and a second housing according to certain embodiments of the disclosure. <FIG> is a graph showing a relationship between an angle of an electronic device and a height of a foot structure according to certain embodiments of the disclosure. <FIG> is a view showing an operation, based on an angle of an electronic device, of a foot structure and a gear assembly according to certain embodiments of the disclosure. <FIG> are schematic views of a hinge module, a gear assembly, and a foot structure of an electronic device, which move based on an angle of the electronic device according to certain embodiments of the disclosure.

Referring to <FIG>, an electronic device <NUM> includes a first housing <NUM>, a second housing <NUM>, a hinge module <NUM>, a gear assembly <NUM>, and/or a foot structure <NUM>. The configuration of the first housing <NUM>, the second housing <NUM>, and the foot structure <NUM> of <FIG> may be entirely or partially the same as the configuration of the first housing <NUM>, the second housing <NUM>, and the foot structure <NUM> of <FIG>. The configuration of the hinge module <NUM>, the gear assembly <NUM>, and/or the foot structure <NUM> of <FIG> and <FIG> to <FIG> may be entirely or partially the same as the configuration of the hinge module <NUM>, the gear assembly <NUM>, and/or the foot structure <NUM> of <FIG>.

According to certain embodiments, the first housing <NUM> is configured to rotate with respect to the second housing <NUM>. For example, a first angle x1 between the first housing <NUM> and the second housing <NUM> may be changed to about <NUM> degree to about <NUM> degrees. According to an embodiment, the first angle x1 may be interpreted as an angle between a first front surface 210a of the first housing <NUM> and a second front surface 220a of the second housing <NUM>.

According to certain embodiments, the foot structure <NUM> may be configured to move based on rotation of the second housing <NUM> with respect to the first housing <NUM>. For example, a first distance d, in which the rack gear <NUM> moves, may be changed based on a rotation angle of the hinge module <NUM> and/or the first angle X1 between the first housing <NUM> and the second housing.

According to certain embodiments, the foot structure <NUM> may be configured to move based on rotation of the second housing <NUM> with respect to the first housing <NUM>. For example, a second distance H, in which the foot structure <NUM> moves, may be changed based on a rotation angle of the hinge module <NUM> and/or the first angle X1 between the first housing <NUM> and the second housing. For example, the rack gear <NUM> may be configured to move by the first distance d, based on the first angle X1, and the foot structure <NUM>, which receives a force or pressure by the rack gear <NUM>, may be configured to move by the second distance H.

According to certain embodiments, the rack gear <NUM> and/or the foot structure <NUM> may be configured to move differently for each section. For example, based on rotation of the second housing <NUM> with respect to the first housing <NUM>, the first angle X1 may be substantially linearly changed, but the rack gear <NUM> engaged with the teeth of the pinion gear <NUM> may be non-linearly changed.

According to certain embodiments, in a first section s1, the pinion gear <NUM> may be configured to engage with the first gear area <NUM> of the rotation gear <NUM>. For example, in the first section s1, the pinion gear <NUM> may be configured to rotate in a direction reverse to the direction in which the rotation gear <NUM> rotates. The rack gear <NUM> may be configured to move by the pinion gear <NUM>, and the foot structure <NUM> may be configured to receive a pressure transmitted from the cam structure <NUM> connected to the rack gear <NUM> and to move below the first housing <NUM>. According to an embodiment, the first section s1 may include a (<NUM>-<NUM>) st section s1-<NUM> in which the cam structure <NUM> and a protruding area <NUM> are spaced apart from each other, and a (<NUM>-<NUM>)nd section s1-<NUM> in which the cam structure <NUM> and the protruding area <NUM> are in contact with each other. According to an embodiment (e.g., <FIG> and <FIG>), in the (<NUM>-<NUM>) st section s1-<NUM>, a fourth inclined surface 511b of the protruding area <NUM> may be configured to be spaced apart from a first inclined surface 430a of the cam structure <NUM> so as to receive no pressure. According to an embodiment (e.g., <FIG> and <FIG>), in the (<NUM>-<NUM>)nd section s1-<NUM>, the fourth inclined surface 511b of the protruding area <NUM> may be configured to touch the first inclined surface 430a of the cam structure <NUM>, and the protruding area <NUM> may be configured to receive pressure provided from the cam structure <NUM>. According to an embodiment, the (<NUM>-<NUM>)st section s1-<NUM> may be a section in which the first angle X1 is <NUM> degree to a first hinge angle a1, and the (<NUM>-<NUM>)nd section s1-<NUM> may be interpreted as a section in which the first angle X1 is the first hinge angle a1 to a second hinge angle a2. The second hinge angle a2 may be greater than the first hinge angle a1. According to an embodiment, the first hinge angle a1 may be <NUM> degrees, and the second hinge angle a2 may be <NUM> degrees.

According to certain embodiments, in the second section s2, the pinion gear <NUM> may be configured not to engage with the rotation gear <NUM>. For example, the pinion gear <NUM> may be configured to face the second gear area <NUM> of the rotation gear <NUM>. According to an embodiment, in the second section s2, the first distance d and the second distance H may be maintained to have a substantially the same size. For example, in the second section s2, the second distance H may be about <NUM>. According to an embodiment (e.g., <FIG> and <FIG>), in the second section s2, a second flat surface 511c of the protruding area <NUM> may be configured to face a first flat surface 430c of the cam structure <NUM>. According to an embodiment, the second section s2 may be interpreted as a section in which the first angle X1 is the second hinge angle a2 to a third hinge angle a3. The third hinge angle a3 may be greater than the second hinge angle a2. According to an embodiment, the third hinge angle a3 may be about <NUM> degrees.

According to certain embodiments, in a third section s3, the pinion gear <NUM> may be configured to engage with the first gear area <NUM> of the rotation gear <NUM>. For example, in the third section s3, the pinion gear <NUM> may be configured to rotate in a direction reverse to the direction in which the rotation gear <NUM> rotates. The rack gear <NUM> may be configured to move by the pinion gear <NUM>, and the foot structure <NUM> may be configured to receive pressure transmitted from the cam structure <NUM> connected to the rack gear <NUM> and thus to move toward the first housing <NUM>. According to an embodiment, the third section s3 may include a (<NUM>-<NUM>)st section s3-<NUM> in which the cam structure <NUM> and a protruding area <NUM> are in contact with each other, and a (<NUM>-<NUM>)nd section s3-<NUM> in which the cam structure <NUM> and the protruding area <NUM> are spaced apart from each other. According to an embodiment (e.g., <FIG> and <FIG>), in the (<NUM>-<NUM>)st section s3-<NUM>, the third inclined surface 511a of the protruding area <NUM> may be configured to touch a second inclined surface 430b of the cam structure <NUM>, and the protruding area <NUM> may be configured to receive pressure provided from the cam structure <NUM>. According to an embodiment (e.g., <FIG> and <FIG>), in the (<NUM>-<NUM>)nd section s3-<NUM>, the third inclined surface 511a of the protruding area <NUM> may be configured to be spaced apart from the second inclined surface 430b of the cam structure <NUM> such that it receives no pressure. According to an embodiment, the (<NUM>-<NUM>)st section s3-<NUM> may be a section in which the first angle X1 is the third hinge angle a3 to a fourth hinge angle a4, and the (<NUM>-<NUM>)nd section s3-<NUM> may be interpreted as a section in which the first angle X1 is the fourth hinge angle a4 to a firth hinge angle a5. The fifth hinge angle a5 may be greater than the fourth hinge angle a4, and the fourth hinge angle a4 may be greater than the third hinge angle a3. According to an embodiment, the fourth hinge angle a4 may be about <NUM> degrees, and the fifth hinge angle a5 may be about <NUM> degrees.

According to certain embodiments of the disclosure, an electronic device (e.g., the electronic device <NUM> of <FIG>) includes a housing (e.g., the housing <NUM> of <FIG>) including a first housing (e.g., the first housing <NUM> of <FIG>) and a second housing (e.g., the second housing <NUM> of <FIG>) configured to rotate with respect to the first housing, a hinge module (e.g., the hinge module <NUM> of <FIG>) which is connected to the first housing and the second housing and includes a rotation gear (e.g., the rotation gear <NUM> of <FIG>), a gear assembly (e.g., the gear assembly <NUM> of <FIG>) including a pinion gear (e.g., the pinion gear <NUM> of <FIG>) rotatably connected to the rotation gear, a rack gear (e.g., the rack gear <NUM> of <FIG>) configured to slide in a first direction (e.g., the first direction (the x-axis direction) of <FIG>), based on rotation of the pinion gear, and a cam structure (e.g., the cam structure <NUM> of <FIG>) connected to the rack gear, and a foot structure (e.g., the foot structure <NUM> of <FIG>) connected to the first housing and configured to move in a second direction (e.g., the second direction (the + Z-direction) of <FIG>) or a third direction (e.g., the third direction (the - Z-direction) of <FIG>) perpendicular to the first direction, based on a movement of the cam structure.

According to certain embodiments, the foot structure may include a foot structure holder (e.g., the foot structure holder <NUM> of <FIG>) including a protruding area (e.g., the protruding area <NUM> of <FIG>) configured to face at least a part of the gear assembly and be in contact with the cam structure.

According to certain embodiments, the rotation gear may include a first gear area (e.g., the first gear area <NUM> of <FIG>) including a first curved-surface (e.g., the first curved-surface 311a of <FIG>) and a first gear tooth (e.g., the first gear teeth 311b of <FIG>) configured to protrude from the first curved-surface, and a second gear area (e.g., the second gear area <NUM> of <FIG>) including a second curved-surface (e.g., the second curved-surface 313a of <FIG>) configured to extend from the first curved-surface and be exposed to the outside of the rotation gear.

According to certain embodiments, the first housing may be configured to rotate with respect to the second housing when the pinion gear corresponds to the first gear area, and the foot structure may be configured to move when the pinion gear corresponds to the first gear area.

According to certain embodiments, the first housing may include a first front surface (e.g., the first front surface 210a of <FIG>) and a first rear surface (e.g., the first rear surface 210b of <FIG>) opposite to the first front surface, the second housing may include a second front surface (e.g., the second front surface 220a of <FIG>) and a second rear surface (e.g., the second rear surface 220b of <FIG>) opposite to the second front surface, and based on rotation of the second housing with respect to the first housing, the first front surface may be configured to face the second front surface and the first rear surface may be configured to face the second rear surface.

According to certain embodiments, the hinge module may include a first rotation gear (e.g., the first rotation gear <NUM> of <FIG>) connected to the first housing, a second rotation gear (e.g., the second rotation gear <NUM> of <FIG>) connected to the second housing, and multiple idle gears (e.g., the idle gears <NUM> of <FIG>) connected to the first rotation gear and the second rotation gear.

According to certain embodiments, the pinion gear may include a first pinion gear (e.g., the first pinion gear <NUM> of <FIG>) configured to engage with the first rotation gear, and a second pinion gear (e.g., the second pinion gear <NUM> of <FIG>) configured to engage with the first pinion gear and the rack gear.

According to certain embodiments, the electronic device may further include an input device (e.g., the input device <NUM> of <FIG>) accommodated in the first housing, and a touch pad (e.g., the touch pad <NUM> of the <FIG>) accommodated in the first housing.

According to certain embodiments, the electronic device may further include a display (e.g., the display <NUM> of <FIG>) accommodated in the second housing.

According to certain embodiments, the gear assembly may include a plate (e.g., the plate <NUM> of <FIG>) connected to the rack gear, and the foot structure may include a guide member (e.g., the guide member <NUM> of <FIG>) including an accommodation groove (e.g., the accommodation groove <NUM> of <FIG>) configured to guide a movement of the plate.

According to certain embodiments, the foot structure may include at least one fastening member (e.g., the fastening member <NUM> of <FIG>) connected to the guide member and the first housing.

According to certain embodiments, the plate may include a first surface (e.g., the first surface 440a of <FIG>) and a second surface (e.g., the second surface 400b of <FIG>) opposite to the first surface, the rack gear may be disposed on the first surface, and the cam structure may be disposed on the second surface.

According to certain embodiments, the foot structure may include a wing part (e.g., the wing part <NUM> of <FIG>) which is configured to extend from a protruding area (e.g., the protruding area <NUM> of <FIG>) configured to be in contact with the cam structure, and at least one elastic member (e.g., the elastic member <NUM> of <FIG>) disposed between the wing part and the first housing.

According to certain embodiments, the foot structure may include a support area (e.g., the support area <NUM> of <FIG>) which is configured to be exposed to the outside of the electronic device and includes an elastic material, e.g., a rubber or rubber-like material.

According to certain embodiments, the first housing may include at least one through-hole (e.g., the through-hole <NUM> of <FIG>) configured to introduce air into the electronic device.

According to certain embodiments of the disclosure, an electronic device (e.g., the electronic device <NUM> of <FIG>) includes a housing (e.g., the housing <NUM> of the <FIG>) including a first housing (e.g., the first housing <NUM> of the <FIG>) and a second housing (e.g., the second housing <NUM> of the <FIG>) configured to rotate with respect to the first housing, a hinge module (e.g., the hinge module <NUM> of <FIG>) which is connected to the first housing and the second housing and includes a rotation gear (e.g., the rotation gear <NUM> of <FIG>), a gear assembly (e.g., the gear assembly <NUM> of <FIG>) including a pinion gear (e.g., the pinion gear <NUM> of <FIG>) rotatably connected to the rotation gear, a rack gear (e.g., the rack gear <NUM> of <FIG>) configured to slide based on rotation of the pinion gear, and a cam structure (e.g., the cam structure <NUM> of <FIG>) connected to the rack gear, and a foot structure connected to the first housing, the foot structure (e.g., the foot structure <NUM> of <FIG>) including a foot structure holder (e.g., the foot structure holder <NUM> of <FIG>) including a protruding area (e.g., the protruding area <NUM> of <FIG>) configured to receive pressure provided from the cam structure, and a support area (e.g., the support area <NUM> of <FIG>) coupled to the foot structure holder and configured to support the electronic device.

According to certain embodiments, the rotation gear may include a first gear area (e.g., the first gear area <NUM> of <FIG>) including a first curved-surface (e.g., the first curved-surface 311a of <FIG>) and a first gear tooth (e.g., the first gear teeth 311b of <FIG>) configured to protrude from the first curved-surface, and a second gear area (e.g., the second gear area <NUM> of <FIG>) including a second curved-surface (e.g., the second curved-surface 313a of <FIG>) which is configured to extend from the first curved-surface and be exposed to the outside of the rotation gear.

According to certain embodiments, the hinge module may include a first rotation gear (e.g., the first rotation gear <NUM> of <FIG>) connected to the first housing, a second rotation gear (e.g., the second rotation gear <NUM> of <FIG>) connected to the second housing, and multiple idle gears (e.g., the idle gear <NUM> of <FIG>) connected to the first rotation gear and the second rotation gear, and the pinion gear may include a first pinion gear (e.g., the first pinion gear <NUM> of <FIG>) configured to engage with the first rotation gear, and a second pinion gear (e.g., the second pinion gear <NUM> of <FIG>) configured to engage with the first pinion gear and the rack gear.

According to certain embodiments, the electronic device may further include an input device (e.g., the input device <NUM> of <FIG>) accommodated in the first housing, a touch pad (e.g., the touch pad <NUM> of the <FIG>) accommodated in the first housing, and a display (e.g., the display <NUM> of <FIG>) accommodated in the second housing.

Claim 1:
An electronic device (<NUM>) comprising:
a housing assembly comprising a first housing (<NUM>) and a second housing (<NUM>) configured to rotate with respect to the first housing (<NUM>) around a first rotation axis (Ax1);
a hinge module (<NUM>, <NUM>) that is coupled to the first housing (<NUM>) and the second housing (<NUM>), the hinge module (<NUM>, <NUM>) comprising a rotation gear (<NUM>) configured to rotate around an axis substantially the same as or parallel to the first rotation axis (Ax1);
a gear assembly (<NUM>) comprising a pinion gear (<NUM>) rotatably coupled to the rotation gear (<NUM>), wherein the pinion gear (<NUM>) is configured to rotate around an axis parallel to the first rotation axis (Ax1), a rack gear (<NUM>) configured to slide in a first axial direction (+Y, -Y) based on rotation of the pinion gear (<NUM>), wherein the first axial direction (+Y, -Y) is perpendicular to the first rotation axis (Ax1);
a cam structure (<NUM>) coupled to the rack gear (<NUM>); and
a foot structure (<NUM>) coupled to the first housing (<NUM>), the foot structure (<NUM>) being moveable in a second axial direction (+Z), perpendicular to the first rotation axis (Ax1) and the first axial direction (+Y, -Y), based on a first movement of the cam structure (<NUM>) and moveable in a third axial direction (-Z) that is perpendicular to the first axial direction (+Y, -Y) , opposed to the second axial direction (-Z), based on a second movement of the cam structure (<NUM>).