Various embodiments relate to an electronic device, and more particularly, to an electronic device including a speaker structure.
Typically, an electronic device may mean a device that performs a specific function according to a program provided therein (e.g., an electronic scheduler, a portable multimedia reproducer, a mobile communication terminal, a tablet PC, an image/sound device, a desktop/laptop PC, or a vehicle navigation system) as well as a home appliance. As the degree of integration of electronic devices has increased and super-high-speed and large-capacity wireless communication has become popular, various functions have recently come to be provided in a single electronic device, such as a mobile communication terminal. For example, various functions, such as an entertainment function (e.g., a game function), a multimedia function (e.g., a music/video reproducing function), a communication and security function for mobile banking, a schedule management function, and an e-wallet function, in addition to a communication function, have come to be integrated in a single electronic device.
Recently, body-worn electronic devices have been commercialized, and mobile communication terminals, body-worn electronic devices, or the like are in everyday use. The use environment of an electronic device may vary according to the living space or movement of an individual user, and thus the electronic device may be exposed to a risk of contamination, damage, or the like. For example, the inside of the electronic device may be contaminated by foreign matter or moisture, and a manufacturer or a user may come up with a measure to protect the electronic device from such contamination or damage. For example, a manufacturer may improve the reliability of an electronic device by incorporating a dustproof and waterproof structure in the electronic device, or a user may purchase and use an aftermarket product (e.g., a protective film or a dustproof and waterproof case). As the use of electronic devices is becoming more common and dustproof and waterproof structures are being incorporated therein, the number of users who enjoy leisure activities while carrying or wearing electronic devices is gradually increasing, and the demand for the performance of dustproof and waterproof structures is also gradually increasing.
In securing a dustproof and waterproof structure in an electronic device, a waterproof member may be disposed between components to block foreign matter or moisture from entering from the outside. However, a microphone hole or a speaker hole providing a sound input/output path may be exposed or opened to the outside, and the sound input/output path may partially allow the inflow of moisture or the like. When moisture that has flowed into the sound input/output path remains there, it may become an obstacle to sound input/output, and may cause corrosion in the internal space of the electronic device.
Various embodiments of the disclosure are able to provide an electronic device including a speaker structure capable of suppressing inflow of moisture through a sound input/output path or the like.
Various embodiments of the disclosure are able to provide an electronic device including a speaker structure capable of rapidly discharging moisture remaining in a sound input/output path.
According to various embodiments of the disclosure, an electronic device may include: a housing including a first plate including an inner surface defining a portion of a space within the housing and an outer surface forming a portion of an exterior of the housing, and a side member integrally formed with an edge of the inner surface to be substantially perpendicular to the inner surface so as to form a recess with the inner surface, the side member including an opening; a speaker structure disposed in the recess adjacent to the opening, the speaker structure including a first surface including a speaker diaphragm facing the opening and a second surface facing away from the first surface; a fastening member mounted substantially perpendicular to the inner surface so as to fix the speaker structure to the housing; and a fixing member fixed to the housing and disposed to be in contact with at least a portion of the second surface so as to press the second surface.
According to various embodiments, an electronic device may include: a housing including a first plate forming a rear surface of the electronic device, a side member extending from the first plate towards a front surface of the electronic device, and an opening formed to penetrate the side member; a speaker structure mounted, adjacent to the opening, in a recess at least partially defined by the first plate and the side member; and a fixing member configured to support a rear surface of the speaker structure so as to fix the speaker structure to an inner surface of the side member. The fixing member may include a first portion, which comes into contact with a portion of a side surface of the speaker structure, a second portion extending from the first portion and bound to the side member, a third portion extending from the first portion to come into contact with the rear surface of the speaker structure, and a fourth portion extending from the third portion and at least partially supported on an inner surface of the first plate.
In the electronic device according to various embodiments of the disclosure, it is possible to provide a sound output (or input) path by forming an opening penetrating the side member of the housing, but to form a waterproof structure by disposing the speaker structure on the inner surface of the side member adjacent to the opening. In an embodiment, the opening extends along the sound emission direction of the speaker structure. Thus, it is possible to minimize the sound output path arriving at the outside of the housing. For example, by reducing the space in which foreign matter such as moisture may flow or remain and facilitating the discharge of moisture or the like using the sound pressure of the speaker structure, it is possible to suppress or alleviate contamination of the internal space of the electronic device. In another embodiment, the fixing member is able to support the speaker structure so as to keep the same in close contact with the side member, and is able to maintain a stable waterproof structure even at a water pressure of 5 atm or more.
As the disclosure allows for various changes and numerous embodiments, various example embodiments will be described in greater detail with reference to the accompanying drawings. However, it should be understood that the disclosure is not limited to the specific embodiments, and that the disclosure includes all modifications, equivalents, and alternatives within the spirit and the scope of the disclosure.
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 all possible combinations of the items enumerated together in a corresponding one of the phrases. Although ordinal terms such as “first” and “second” may be used to describe various elements, these elements are not limited by the terms. The terms are used merely to distinguish an element from the other elements. For example, a first element could be termed a second element, and similarly, a second element could be also termed a first element without departing from the scope of the disclosure. As used herein, the term “and/or” includes any and all combinations of one or more associated items. 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,” or “connected with,”, the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element.
Further, the relative terms “a front surface”, “a rear surface”, “a top surface”, “a bottom surface”, and the like which are described with respect to the orientation in the drawings may be replaced by ordinal numbers such as first and second. In the ordinal numbers such as first and second, their order are determined in the mentioned order or arbitrarily.
In the disclosure, the terms are used to describe specific embodiments, and are not intended to limit the disclosure. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. In the disclosure, the terms such as “include” and/or “have” may be understood to denote a certain characteristic, number, step, operation, constituent element, component or a combination thereof, but may not be construed to exclude the existence of or a possibility of addition of one or more other characteristics, numbers, steps, operations, elements, components or combinations thereof.
Unless defined differently, all terms used herein, which include technical terminologies or scientific terminologies, have the same meaning as that understood by a person skilled in the art to which the disclosure belongs. Such terms as those defined in a generally used dictionary are to be interpreted to have the meanings equal to the contextual meanings in the relevant field of art, and are not to be interpreted to have ideal or excessively formal meanings unless clearly defined in the disclosure.
In the disclosure, an electronic device may be a random device, and the electronic device may be called a terminal, a portable terminal, a mobile terminal, a communication terminal, a portable communication terminal, a portable mobile terminal, a touch screen or the like.
For example, the electronic device may, for example, and without limitation, be a smartphone, a portable phone, a game player, a TV, a display unit, a heads-up display unit for a vehicle, a notebook computer, a laptop computer, a tablet Personal Computer (PC), a Personal Media Player (PMP), a Personal Digital Assistants (PDA), and the like. The electronic device may be implemented as a portable communication terminal which has a wireless communication function and a pocket size. Further, the electronic device may be a flexible device or a flexible display device. However, the disclosure is not limited thereto.
The electronic device may communicate with an external electronic device, such as a server or the like, or perform an operation through an interworking with the external electronic device. For example, the electronic device may transmit an image photographed by a camera and/or position information detected by a sensor unit to the server through a network. The network may be a mobile or cellular communication network, a Local Area Network (LAN), a Wireless Local Area Network (WLAN), a Wide Area Network (WAN), an Internet, a Small Area Network (SAN) or the like, but is not limited thereto.
Referring to
According to an embodiment, the electronic device 100 may include at least one of a display, audio modules 105 and 108, a sensor module 111, key input devices 102,103, and 104, and a connector hole 109. In some embodiments, in the electronic device 100, at least one of the components (e.g., the key input devices 102, 103, and 104, the connector hole 109, or the sensor module 111) may be omitted, or other components may be additionally included.
The display may be disposed on, for example, the inner surface of the front plate 101, and may be exposed through a substantial portion of the front plate 101. The shape of the display may correspond to the shape of the front plate 101, and may be any of various shapes, such as a circle, an ellipse, and a polygon. The display may be coupled to or disposed adjacent to a touch-sensing circuit, a pressure sensor capable of measuring the intensity (pressure) of a touch, and/or a fingerprint sensor.
The audio modules 105 and 108 may include a microphone hole 105 and a speaker hole 108. The microphone hole 105 may include a microphone disposed therein so as to acquire external sound, and in some embodiments, multiple microphones may be disposed therein so as to detect the direction of sound. The speaker hole 108 may be used for an external speaker and a phone call receiver. In some embodiments, the speaker hole 108 and the microphone hole 105 may be implemented as a single hole, or a speaker may be included without the speaker hole 108 (e.g., a piezo speaker).
The sensor module 111 may generate electrical signals or data values corresponding to the internal operating states or the external environmental states of the electronic device 100. The sensor module 111 may include, for example, a biometric sensor module 111 (e.g., an HRM sensor) disposed on the second surface 110B of the housing 110. The electronic device 100 may further include at least one of sensor modules (not illustrated in the drawings), such as 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, a humidity sensor, or an illuminance sensor.
The key input devices 102, 103, and 104 may include a wheel key 102 disposed on the first surface 110A of the housing 110 and configured to be rotatable in at least one direction, and/or side key buttons 102 and 103 disposed on the side surface 110C of the housing 110. The wheel key may have a shape corresponding to the shape of the front plate 101. In another embodiment, the electronic device 100 may not include some or all of the above-mentioned key input devices 102, 103, and 104, and a non-included key input device 102, 103, or 104 may be implemented in another form, such as a soft key on the display. The connector hole 109 may accommodate a connector (e.g., a USB connector) configured to transmit/receive power and/or data to/from an external electronic device, and may include another connector hole (not illustrated) capable of accommodating a connector configured to transmit/receive an audio signal to/from an external electronic device. The electronic device 100 may further include, for example, a connector cover (not illustrated), which covers at least a portion of the connector hole 109 and blocks inflow of external foreign matter into the connector hole.
Each of the binding members 150 and 160 may be detachably fastened to at least a portion of the housing 110 using a locking member 151 or 161. Each of the binding members 150 and 160 may include at least one of a first fixing member 152, first fixing-member-fastening holes 153, a band guide member 154, and a band-fixing ring 155.
The first fixing member 152 may be configured to fix the housing 110 and the binding members 150 and 160 to a portion of a body of a user (e.g., a wrist or an ankle). The first fixing-member-fastening holes 153 allow the housing 110 and the binding members 150 and 160 to be fixed to the portion of the body of the user in cooperation with the first fixing member 152. The band guide member 154 is configured to limit the movement range of the first fixing member 152 when the first fixing member 152 is fastened to any of the first fixing-member-fastening holes 153 so as to ensure that the binding members 150 and 160 are brought into close contact with and bound on the portion of the body of the user. The band-fixing ring 155 is capable of limiting the movement range of the binding members 150 and 160 in the state in which the first fixing member 152 and any of the first fixing-member-fastening holes 153 are fastened to each other.
Referring to
At least one of the components of the electronic device 300 may be the same as or similar to at least one of the components of the electronic device 100 of
The side bezel structure 310 may form a portion of the exterior of the electronic device 300, and may be connected to or integrally formed with a support member disposed inside the electronic device 300. The support member may be formed of, for example, a metal material and/or a non-metal (e.g., a polymer) material, and may support a display or a printed circuit board 380. On the printed circuit board 380, a processor, a memory, and/or an interface may be mounted. The processor may include, for example, one or more of a central processing unit, an application processor, a graphics processing unit (GPU), an application processor, a sensor processor, or a communication processor.
The memory may include, for example, a volatile memory or a nonvolatile memory. The interface may include, for example, a high-definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. The interface may electrically or physically connect, for example, the electronic device 300 to an external electronic device, and may include a USB connector, an SD card/MMC connector, or an audio connector.
The electronic device 300 includes a battery so as to be capable of supplying power to at least one component thereof. The battery may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell. At least a portion of the battery may be disposed to be substantially flush with, for example, the printed circuit board 380 while being supported by, for example, the support member. The battery may be integrally disposed inside the electronic device 300, or may be detachably disposed on the electronic device 300.
An antenna of the electronic device 300 may be disposed between the front plate 101 and the rear plate (e.g., the first plate 393a) of the housing 393. In some embodiments, the electronic device 300 may include a plurality of antennas disposed to face each other with the printed circuit board 380 interposed therebetween, and a near-field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna may be formed. For example, by including an antenna, the electronic device 300 may perform short-range communication with an external device, may wirelessly transmit/receive power required for charging, or may transmit a short-range communication signal or a magnet-based signal including payment data. In another embodiment, an antenna structure may be formed by the side bezel structure 310, a portion of the housing 393 and/or a portion of the support member, or a combination thereof.
The sealing member 390 may be located between the side bezel structure 310 and the housing 393. The sealing member 390 may be configured to block moisture and foreign matter flowing into the space surrounded by the side bezel structure 310 and the housing 393 from the outside.
The housing 393 may include a first plate 393a and a side member 393b, and may form another portion of the exterior of the electronic device 300. In an embodiment, the side member 393b is integrally formed at the edge of the first plate 393a, and may define at least a portion of the recess S in the housing 393 together with the first plate 393a. For example, the recess S in the housing 393 may be partially surrounded by the first plate 393a and the side member 393b. In another embodiment, the side surface of the electronic device 300 may be substantially formed by coupling the side bezel structure 310 to the side member 393b. The speaker structure 303 may be disposed to face the inner surface of the side member 393b, and may be supported or fixed by the second fixing member 304. In another embodiment, the electronic device 300 may include fastening members 399 so as to fix the speaker structure 303 or the second fixing member 304 to the housing 393 by including fastening members 399.
The configuration or the mounting structure of each of the speaker structure 303 or the second fixing member 304 will be described with further reference to
Further referring to
According to various embodiments, the side member 393b may include an opening 415. For example, the opening 415 may be formed to penetrate the side member 393b from the inner surface I2 to the outer surface O2 of the side member 393b, and may provide a sound input or output path. In the present embodiment, by being disposed adjacent to the speaker structure 303, the opening 415 will be described as an example of providing a sound output path, but the disclosure is not limited thereto. If a microphone structure is disposed adjacent to the opening 415, the opening 415 may provide a sound input path. In an embodiment, the opening 415 may have a shape in which a cross-sectional area decreases from the inner surface 12 towards the outer surface O2 along the sound output direction.
According to various embodiments, the side member 393b may further include an assembly hole 413 formed in the inner surface I2. The assembly hole 413 has a shape recessed from the inner surface I2 in the sound output direction, and the inner wall of the assembly hole 413 may be substantially a portion of the inner surface I2. In an embodiment, the speaker structure 303 is at least partially accommodated in the assembly hole 413 so as to output sound to the outside of the housing 393 or the electronic device 300 through the opening 415. For example, the opening 415 is connected to the assembly hole 413, and the speaker structure 303 may be mounted in the assembly hole 413 to be connected to an external space (e.g., the housing 393 or the outside of the electronic device 300) through the opening 415.
According to various embodiments, the housing 393 may further include at least one first fastening boss 411. The first fastening boss 411 may protrude from the inner surface of the first plate 393a, for example, the inner surface I1, and may extend parallel to the side member 393b. In an embodiment, a pair of first fastening bosses 411 may be formed on opposite sides of the assembly hole 415, respectively. As will be described later, the first fastening bosses 411 may provide means for fixing the speaker structure 303 or the second fixing member 304 to the housing 393 when the fastening members 399 are fastened thereto.
According to various embodiments, the housing 393 may further include a binding protrusion 419 and a support groove 421. The binding protrusion 419 may protrude from the top surface U of the side member 393b inclined or perpendicular to the inner surface I2. The support groove 421 is formed as a portion of the first plate 393a, for example, the inner surface I1, is recessed at a position adjacent to the side member 393b or the assembly hole 413. The binding protrusion 419 or the support groove 421 may provide means for binding or supporting at least a portion of the second fixing member 304.
Referring to
According to various embodiments, the speaker structure 303 may include a waterproof member (e.g., the waterproof member 1106 in
According to various embodiments, waterproof members, for example, the first waterproof protrusion 611 and the second waterproof protrusion 613, may be disposed inside the assembly hole 413, and may form a sealing structure between the speaker structure 303 and the side member 393b. For example, a waterproof structure is formed between the speaker structure 303 and the side member 393b, and the opening 415 may be isolated from the recess S by the speaker structure 303 and the waterproof member. The arrangement structure of the waterproof member described above will be described in more detail with reference to
According to various embodiments, the speaker structure 303 may further include second fastening bosses 615 corresponding to the first fastening bosses 411. In an embodiment, a pair of second fastening bosses 615 may be disposed on opposite sides of the speaker structure 303, respectively. When the speaker structure 303 is mounted in the housing 393, for example, when the first waterproof protrusion 611 or the second waterproof protrusion 613 is accommodated in the assembly hole 413, the second fastening bosses 615 may be seated on the upper end of the first fastening bosses 411.
Referring to
According to various embodiments, the second fixing member 304 includes a plurality of portions divided according to a bent shape or a region corresponding to another structure (e.g., the housing 393 or the speaker structure 303). For example, the second fixing member 304 may include a first portion 711 that comes into contact with at least a portion of an outer surface of the speaker structure 303, for example, the fourth surface F4, and a second portion 712 extending from a portion of the first portion 711 and coupled to the side member 393b. In an embodiment, the portion of the second fixing member 304 that comes into contact with the second surface F2 may be defined as a third portion 713 extending from the first portion 711. In another embodiment, the second fixing member 304 may include a fourth portion 714, which extends from the third portion 713 and comes into contact with the housing 393. In another embodiment, the second fixing member 304 may include fastening pieces 715 extending away from each other on opposite sides of the first portion 711.
According to various embodiments, the first portion 711 may be disposed to be in contact with the fourth surface F4 so that the speaker structure 303 can be fixed between the inner surface (e.g., the inner surface I1 in
According to various embodiments, the third portion 713 may extend from the first portion 711, and may be bent to be inclined or substantially perpendicular to the first portion 711. In an embodiment, when the second fixing member 304 is mounted in the housing 393, the third portion 713 may be disposed to face or to be in contact with the second surface F2. For example, when the second fixing member 304 is mounted in the housing 393, the speaker structure 303 may be disposed between the third portion 713 and the inner surface I2 of the side member 393b (e.g., the inner wall of the assembly hole 413). In an embodiment, the third portion 713 may bring the waterproof member (e.g., the first waterproof protrusion 611 or the second waterproof protrusion 613 in
According to various embodiments, the fourth portion 714 extends from the third portion 713, and may be bent to be inclined or perpendicular to the third portion 713. In an embodiment, the fourth portion 714 may be disposed in the state of facing the inner surface (e.g., the inner surface I1 in
According to various embodiments, a pair of fastening pieces 715 may respectively extend from opposite sides of the first portion 711. Each fastening piece 715 may have a shape that is bent so as to come into contact with the fourth surface F4 at one portion thereof and to come into contact with one of the opposite side surfaces of the speaker structure 303 at another portion thereof. For example, the fastening pieces 715 may be bent in a shape that partially surrounds the outer surface of the speaker structure 303 including a portion of the fourth surface F4. The fastening pieces 715 may include fastening holes 715a formed at the ends thereof, respectively, and the fastening holes 715a may be substantially aligned with the first fastening bosses 411 or the second fastening bosses 615.
Referring to
Referring to
According to various embodiments, in the state in which the second fixing member 304 is seated on the housing 393, the fastening pieces 715, for example, the fastening holes 715a, may be disposed on the top surfaces 411 of the first fastening bosses 411, with the second fastening bosses 615 interposed therebetween. According to an embodiment, fastening members (e.g., the fastening members 399 in
According to various embodiments, the second fixing member 304 or the fastening members 399 may substantially fix the speaker structure 303 to the housing 393. For example, the second portion 712, the third portion 713, or the fourth portion 714 may constrain the speaker structure 303 to the housing 393 in the sound output direction of the speaker structure 303 (e.g., the direction A in
Referring to
According to various embodiments, in the state in which the first waterproof protrusion 611 or the second waterproof protrusion 613 has already been in close contact with the inner wall of the assembly hole 413, when the third portion 713 presses the speaker structure 303 (e.g., the second surface F2), the first waterproof protrusion 611 or the second waterproof protrusion 613 may be compressed. The shaded area indicated by “C” in the first waterproof protrusion 611 or the second waterproof protrusion 613 in
According to various embodiments, the diaphragm 1131 of the speaker structure 303 is disposed to face the opening 415, and thus the sound output from the diaphragm 1131 or the speaker structure 303 is emitted substantially through the opening 415 in the sound output direction A. In some embodiments, the diaphragm 1131 may form a portion of the first surface F1, or may be located further inwards than the first surface F1. When the diaphragm 1131 is contaminated by foreign matter such as dust, sound may not be smoothly output. The electronic device (e.g., the electronic device 300 in
According to various embodiments, the sound emission surface of the speaker structure 303, for example, the first surface F1, is disposed to substantially face the inner surface I2 of the side member 393b, and the opening 415 may extend through the side member 393b from the inner surface I2 of the side member 393b (e.g., the inner wall of the assembly hole 413 in
Referring to
Referring to
Referring to
As described above, according to various embodiments of the disclosure, an electronic device (e.g., the electronic device 100 or 300 in
According to various embodiments, the speaker structure may further include a third surface (e.g., the third surface F3 in
According to various embodiments, the inner surface may include a support groove (e.g., the support groove 421 in
According to various embodiments, the fixing member may include a metal.
According to various embodiments, the speaker structure may further include a waterproofing member (e.g., the waterproofing member 1106 in
According to various embodiments, the waterproofing member may be in close contact with an inner surface of the side member around the opening.
According to various embodiments of the disclosure, an electronic device may include: a housing including a first plate forming a rear surface of the electronic device, a side member extending from the first plate towards a front surface of the electronic device, and an opening formed to penetrate the side member; a speaker structure mounted adjacent to the opening in a recess at least partially defined by the first plate and the side member; and a fixing member configured to support a rear surface of the speaker structure so as to fix the speaker structure to an inner surface of the side member. The fixing member may include a first portion that comes into contact with a portion (e.g., the fourth surface F4 in
According to various embodiments, the electronic device may further include a support groove formed in an inner surface of the first plate. The fourth portion may be bent to be inclined or perpendicular with respect to the third portion so as to be at least partially accommodated in the support groove.
According to various embodiments, the electronic device may further include: a binding protrusion (e.g., the binding protrusion 419 in
According to various embodiments, the speaker structure may further include a first waterproof protrusion (e.g., the first waterproof protrusion 611 in
According to various embodiments, the first waterproof protrusion forms a closed curve, and may be in close contact with the inner surface of the side member around the opening.
According to various embodiments, the speaker structure may further include a second waterproof protrusion (e.g., the waterproof protrusion 613 in
According to various embodiments, the electronic device may further include: at least one first fastening boss (e.g., the first fastening boss 411 in
According to various embodiments, the side member may further include an assembly hole (e.g., the assembly hole 413 in
According to various embodiments, the speaker structure may further include a first waterproof protrusion protruding along a direction in which the opening extends from the edge of a front surface facing away from the rear surface, and a second waterproof protrusion protruding from a side surface between the rear surface and the front surface. The second waterproof protrusion may be disposed adjacent to the first waterproof protrusion.
According to various embodiments, the first waterproof protrusion and the second waterproof protrusion may form a closed curve, and may be in close contact with the inner surface of the side member around the opening.
According to various embodiments, the first waterproof protrusion may include an outer surface, which is at least partially curved, and the second waterproof protrusion may include an outer surface, which is at least partially flat.
According to various embodiments, the opening has a cross-sectional area that may gradually decrease from the assembly hole towards the outer surface of the side member.
According to various embodiments, the fixing member may further include a first support (e.g., the beads 1441 in
According to various embodiments, the electronic device may further include a second support (e.g., the support 1611 in
In the foregoing detailed description, specific embodiments of the disclosure have been described. However, it will be evident to a person ordinarily skilled in the art that various modifications may be made without departing from the scope of the disclosure.
Number | Date | Country | Kind |
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10-2018-0084165 | Jul 2018 | KR | national |
Filing Document | Filing Date | Country | Kind |
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PCT/KR2019/004150 | 4/8/2019 | WO | 00 |