WO2019189975A1 - Mobile terminal comprising inner frame and method for manufacturing inner frame - Google Patents

Abstract

The present invention relates to a mobile terminal comprising an inner frame and a method for manufacturing an inner frame and, more particularly, to a mobile terminal and a method for manufacturing an inner frame provided in a mobile terminal, the mobile terminal comprising: a terminal body; an inner frame installed inside the terminal body to support the terminal body; and a circuit board supported by the inner frame, wherein the inner frame has a metal layer formed on a base formed of a polymer material so as to cover a surface of the base.

Description

Method of manufacturing a mobile terminal and an inner frame including an inner frame

The present invention relates to a mobile terminal including an inner frame and a method of manufacturing an inner frame having a metal layer formed on a surface thereof.

Mobile terminals may be divided into mobile / portable terminals and stationary terminals according to their mobility. The mobile terminal may be further classified into a handheld terminal and a vehicle mounted terminal according to whether a user can directly carry it.

Such terminals have various functions according to the development of technology. For example, it is implemented in the form of a multimedia player having complex functions such as taking a picture or a video, playing a music or a video file, playing a game, or receiving a broadcast. Further, in order to support and increase the function of the terminal, it may be considered to improve the structural part and / or the software part of the terminal.

Recently, due to the generalization of the terminal device which consists of metal materials exposed to the outside for the high quality of the appearance, the internal frame for supporting the display and the circuit board is made of metal material.

However, if the inner frame is manufactured of metal material, the cost of the mobile terminal is heavy, and thus the material cost is increased. In addition, the manufacturing process is complicated because the inner frame has to be separately mounted on the antenna for radiation or heat transfer.

In addition, when the inner frame is made of plastic material, it is difficult to secure rigidity, and plating metal on the plastic material is problematic in durability such as scratching.

It is an object of the present invention to provide an internal frame having a structure capable of securing antenna radiation performance and heat dissipation performance while reducing the weight of an internal frame for a mobile terminal.

It is an object of the present invention to provide a method for manufacturing an inner frame which can simplify the manufacturing process and reduce the production cost.

In order to achieve the above object, the present invention provides a terminal body; An inner frame installed in the terminal body to support the terminal body; And a circuit board supported by the inner frame, wherein the inner frame is formed such that a metal layer is formed on the base made of a polymer material to cover the surface of the base.

In one embodiment, the metal layer is selectively formed on the surface of the base, it may be located on the base surface to have a set pattern.

In one embodiment, the surface of the base may be made to have a set roughness value to be in close contact with the metal layer.

In one embodiment, the metal layer is connected to the antenna structure mounted on the circuit board, it can radiate a radio communication signal received from the antenna structure to the outside.

In one embodiment, the inner frame may include a ring-shaped side portion constituting the side of the terminal body, and a bottom portion coupled to the side portion and supporting the display unit.

In one embodiment, the circuit board may be screwed to one side of the bottom of the inner frame so as to pass through the metal layer.

In one embodiment, a slit having a set width may be formed at one side of the side part to expose the base to the outside.

In one embodiment, the inner frame and the circuit board are disposed adjacent to each other, the heat generated from the circuit board can be transferred along the metal layer.

In this case, the metal layer may be made of any one of aluminum, stainless steel, titanium and tungsten, and the metal layer may be formed to have a thickness of 25 to 50 μm on the surface of the inner frame.

In order to achieve the above object, the internal frame according to the present invention, forming a base made of a polymer material;

Masking by mounting a jig on the base to selectively form a metal layer on the surface of the base;

Polishing the surface of the base to be uniform and then sanding the surface of the base to have a set roughness; A first surface treatment step of washing the surface of the base; Forming a metal layer formed of any one of aluminum, stainless steel, titanium, and tungsten on the surface of the base; A second surface treatment step of removing an oxide film formed on the metal layer and securing a uniform surface; Detaching the jig seated on the base; A metal layer surface treatment step for securing a characteristic of a material of the metal layer formed on the base; Segmenting the metal layer by forming slits in the metal layer formed on the base; And it may be made to include a post-segmentation step to prevent damage to the base exposed to the outside by the slit.

In the present invention, the internal frame for a mobile terminal having the above structure is formed of a metal layer on a base made of a polymer material, thereby allowing weight reduction.

In addition, according to the present invention, through the structure to selectively form a metal layer on the base, it is possible to secure the antenna performance and the heat radiation performance to obtain.

In addition, the inner frame and the bottom frame of the side frame can be made of a metal which can be easily machined to facilitate processing of the inner frame.

1A is a block diagram illustrating a mobile terminal related to the present invention.

1B and 1C are views of a mobile terminal according to an embodiment of the present invention viewed from different directions.

2 is an exploded view of a mobile terminal according to the present invention.

3 is a view showing a state of an internal frame.

4A is a cross-sectional view of the inner frame taken along line A of FIG. 3.

4B is a cross-sectional view of the inner frame taken along line B of FIG. 3.

5 is a conceptual diagram illustrating a slit formed on an outer side surface of the inner frame.

6A and 6B illustrate a state in which a circuit board is coupled to an internal frame.

7 is a diagram illustrating an internal cross section of the mobile terminal.

8 is a view for explaining the step of manufacturing the inner frame according to the present invention.

9 is a flowchart of a method of manufacturing an inner frame.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, and the same or similar components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other. In addition, in describing the embodiments disclosed herein, when it is determined that the detailed description of the related known technology may obscure the gist of the embodiments disclosed herein, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easily understanding the embodiments disclosed in the present specification and are not to be construed as limiting the technical spirit disclosed in the present specification by the accompanying drawings.

Also, when an element such as a layer, region or substrate is referred to as being on another component "on", it is to be understood that it may be directly on another element or intermediate elements may be present therebetween. There will be.

1A is a block diagram illustrating a mobile terminal 100 related to the present invention.

The mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a sensing unit 140, an output unit 150, an interface unit 160, a memory 170, a controller 180, and a power supply unit 190. ) May be included. The components shown in FIG. 1A are not essential to implementing the mobile terminal 100, so the mobile terminal 100 described herein may have more or fewer components than those listed above. have.

More specifically, of the components, the wireless communication unit 110, between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal, or between the mobile terminal 100 and an external server It may include one or more modules that enable wireless communication. In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The wireless communication unit 110 may include at least one of the broadcast receiving module 111, the mobile communication module 112, the wireless internet module 113, the short range communication module 114, and the location information module 115. .

The input unit 120 may include a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, an audio input unit, or a user input unit 123 for receiving information from a user. , Touch keys, mechanical keys, and the like. The voice data or the image data collected by the input unit 120 may be analyzed and processed as a control command of the user.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the mobile terminal 100, surrounding environment information surrounding the mobile terminal 100, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, an illumination sensor, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. G-sensor, Gyroscope Sensor, Motion Sensor, RGB Sensor, Infrared Sensor, Infrared Sensor, Finger Scan Sensor, Ultrasonic Sensor Optical sensors (e.g. cameras 121), microphones (see 122), battery gauges, environmental sensors (e.g. barometers, hygrometers, thermometers, radiation detection sensors, Thermal sensors, gas sensors, etc.), chemical sensors (eg, electronic noses, healthcare sensors, biometric sensors, etc.). Meanwhile, the mobile terminal disclosed herein may use a combination of information sensed by at least two or more of these sensors.

The output unit 150 is used to generate an output related to sight, hearing, or tactile sense, and includes at least one of a display unit 151, an audio output unit 152, a hap tip module 153, and an optical output unit 154. can do. The display unit 151 forms a layer structure with or is integrally formed with the touch sensor, thereby implementing a touch screen. The touch screen may function as a user input unit 123 that provides an input interface between the mobile terminal 100 and the user, and may also provide an output interface between the mobile terminal 100 and the user.

The interface unit 160 serves as a path to various types of external devices connected to the mobile terminal 100. The interface unit 160 connects a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, and an identification module. It may include at least one of a port, an audio input / output (I / O) port, a video input / output (I / O) port, and an earphone port. In the mobile terminal 100, in response to an external device being connected to the interface unit 160, appropriate control associated with the connected external device may be performed.

In addition, the memory 170 stores data supporting various functions of the mobile terminal 100. The memory 170 may store a plurality of application programs or applications driven in the mobile terminal 100, data for operating the mobile terminal 100, and instructions. At least some of these applications may be downloaded from an external server via wireless communication. In addition, at least some of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions of the mobile terminal 100 (for example, a call forwarding, a calling function, a message receiving, and a calling function). The application program may be stored in the memory 170 and installed on the mobile terminal 100 to be driven by the controller 180 to perform an operation (or function) of the mobile terminal 100.

In addition to the operation related to the application program, the controller 180 typically controls the overall operation of the mobile terminal 100. The controller 180 may provide or process information or a function appropriate to a user by processing signals, data, information, and the like, which are input or output through the above-described components, or by driving an application program stored in the memory 170.

In addition, the controller 180 may control at least some of the components described with reference to FIG. 1A in order to drive an application program stored in the memory 170. Furthermore, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 to drive the application program.

The power supply unit 190 receives power from an external power source and an internal power source under the control of the controller 180 to supply power to each component included in the mobile terminal 100. The power supply unit 190 includes a battery, which may be a built-in battery or a replaceable battery.

At least some of the components may operate in cooperation with each other in order to implement an operation, control, or control method of the mobile terminal 100 according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal 100 may be implemented on the mobile terminal by driving at least one application program stored in the memory 170.

Hereinafter, the components listed above will be described in detail with reference to FIG. 1A before looking at various embodiments implemented through the mobile terminal 100 described above.

First, referring to the wireless communication unit 110, the broadcast receiving module 111 of the wireless communication unit 110 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

The mobile communication module 112 may include technical standards or communication schemes for mobile communication (eg, Global System for Mobile communication (GSM), Code Division Multi Access (CDMA), Code Division Multi Access 2000 (CDMA2000), EV, etc.). Enhanced Voice-Data Optimized or Enhanced Voice-Data Only (DO), Wideband CDMA (WCDMA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), LTE-A (Long Term Evolution-Advanced) and the like to transmit and receive a radio signal with at least one of a base station, an external terminal, a server on a mobile communication network.

The wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless internet module 113 refers to a module for wireless internet access and may be embedded or external to the mobile terminal 100. The wireless internet module 113 is configured to transmit and receive wireless signals in a communication network according to wireless internet technologies.

Examples of wireless Internet technologies include Wireless LAN (WLAN), Wireless-Fidelity (Wi-Fi), Wireless Fidelity (Wi-Fi) Direct, Digital Living Network Alliance (DLNA), Wireless Broadband (WiBro), and WiMAX (World). Interoperability for Microwave Access (HSDPA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Long Term Evolution (LTE), Long Term Evolution-Advanced (LTE-A), and the like. 113) transmits and receives data according to at least one wireless Internet technology in a range including the Internet technologies not listed above.

In view of the fact that the wireless Internet access by WiBro, HSDPA, HSUPA, GSM, CDMA, WCDMA, LTE, LTE-A, etc. is made through a mobile communication network, the wireless Internet module 113 for performing a wireless Internet access through the mobile communication network 113 ) May be understood as a kind of mobile communication module 112.

The short range communication module 114 is for short range communication, and includes Bluetooth ™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and NFC. (Near Field Communication), at least one of Wi-Fi (Wireless-Fidelity), Wi-Fi Direct, Wireless USB (Wireless Universal Serial Bus) technology can be used to support short-range communication. The short-range communication module 114 may be different between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal, or different from the mobile terminal 100 through a wireless area network. It may support wireless communication between the network where the mobile terminal (or external server) is located. The short range wireless communication network may be short range wireless personal area networks.

Here, the other mobile terminal is a wearable device capable of exchanging (or interworking) data with the mobile terminal 100 according to the present invention, for example, a smart watch, a smart glass. glass, head mounted display (HMD). The short range communication module 114 may sense (or recognize) a wearable device that can communicate with the mobile terminal 100, around the mobile terminal 100. Further, when the detected wearable device is a device that is authenticated to communicate with the mobile terminal 100 according to the present invention, the controller 180 may include at least a portion of data processed by the mobile terminal 100 in the short range communication module ( The transmission may be transmitted to the wearable device through 114. Therefore, the user of the wearable device may use data processed by the mobile terminal 100 through the wearable device. For example, according to this, when a call is received by the mobile terminal 100, the user performs a phone call through the wearable device or when a message is received by the mobile terminal 100, the received through the wearable device. It is possible to check the message.

The location information module 115 is a module for acquiring the location (or current location) of the mobile terminal 100. Examples of the location information module 115 include a global positioning system (GPS) module or a wireless fidelity (WiFi) module. For example, when the mobile terminal 100 utilizes a GPS module, the mobile terminal 100 may acquire the location of the mobile terminal 100 using a signal transmitted from a GPS satellite. As another example, when the mobile terminal 100 utilizes the Wi-Fi module, the location of the mobile terminal 100 is based on information of the Wi-Fi module and a wireless access point (AP) transmitting or receiving a wireless signal. Can be obtained. If necessary, the location information module 115 may perform at least one function of other modules of the wireless communication unit 110 to substitute or additionally obtain data regarding the location of the mobile terminal 100. The location information module 115 is a module used to obtain a location (or current location) of the mobile terminal 100, and is not limited to a module that directly calculates or obtains the location of the mobile terminal 100.

Next, the input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user, and for inputting image information, the mobile terminal 100 is one. Alternatively, the plurality of cameras 121 may be provided. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video call mode or the photographing mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170. On the other hand, the plurality of cameras 121 provided in the mobile terminal 100 may be arranged to form a matrix structure, and through the camera 121 forming a matrix structure in this way, the mobile terminal 100 may have various angles or focuses. The plurality of pieces of image information may be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to acquire a left image and a right image for implementing a stereoscopic image.

The microphone 122 processes external sound signals into electrical voice data. The processed voice data may be variously used according to a function (or an application program being executed) performed by the mobile terminal 100. Meanwhile, various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in the process of receiving an external sound signal.

The user input unit 123 is for receiving information from a user. When information is input through the user input unit 123, the controller 180 may control an operation of the mobile terminal 100 to correspond to the input information. . The user input unit 123 may be a mechanical input unit (or a mechanical key, for example, a button, a dome switch, a jog wheel, or the like located on the front, rear, or side surfaces of the mobile terminal 100). Jog switch, etc.) and touch input means. As an example, the touch input means may include a virtual key, a soft key, or a visual key displayed on the touch screen through a software process, or a portion other than the touch screen. It may be made of a touch key disposed in the. The virtual key or the visual key may be displayed on the touch screen while having various forms, for example, graphic, text, icon, video, or the like. It can be made of a combination of.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal 100, surrounding environment information surrounding the mobile terminal 100, and user information, and generates a sensing signal corresponding thereto. The controller 180 may control driving or operation of the mobile terminal 100 or perform data processing, function or operation related to an application program installed in the mobile terminal 100 based on the sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object present in the vicinity without using a mechanical contact by using an electromagnetic force or infrared rays. The proximity sensor 141 may be disposed in the inner region of the mobile terminal 100 covered by the touch screen described above or near the touch screen.

Examples of the proximity sensor 141 include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. In the case where the touch screen is capacitive, the proximity sensor 141 may be configured to detect the proximity of the object by the change of the electric field according to the proximity of the conductive object. In this case, the touch screen (or touch sensor) itself may be classified as a proximity sensor.

On the other hand, for convenience of explanation, an action of allowing the object to be recognized without being in contact with the touch screen so that the object is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching an object on a screen is called a "contact touch." The position at which the object is in close proximity touch on the touch screen means a position where the object is perpendicular to the touch screen when the object is in close proximity touch. The proximity sensor 141 may detect a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, and a proximity touch movement state). have. Meanwhile, the controller 180 processes data (or information) corresponding to the proximity touch operation and the proximity touch pattern detected through the proximity sensor 141 as described above, and further, provides visual information corresponding to the processed data. It can be output on the touch screen. Further, the controller 180 may control the mobile terminal 100 to process different operations or data (or information) according to whether the touch on the same point on the touch screen is a proximity touch or a touch touch. .

The touch sensor senses a touch (or touch input) applied to the touch screen (or the display unit 151) using at least one of various touch methods such as a resistive film method, a capacitive method, an infrared method, an ultrasonic method, and a magnetic field method. do.

As an example, the touch sensor may be configured to convert a change in pressure applied to a specific portion of the touch screen or capacitance generated at the specific portion into an electrical input signal. The touch sensor may be configured to detect a position, an area, a pressure at the touch, a capacitance at the touch, and the like, when the touch object applying the touch on the touch screen is touched on the touch sensor. Here, the touch object is an object applying a touch to the touch sensor and may be, for example, a finger, a touch pen or a stylus pen, a pointer, or the like.

As such, when there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and then transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched. Here, the touch controller may be a separate component from the controller 180 or may be the controller 180 itself.

Meanwhile, the controller 180 may perform different control or perform the same control according to the type of touch object that touches the touch screen (or a touch key provided in addition to the touch screen). Whether to perform different control or the same control according to the type of touch object may be determined according to the operation state of the mobile terminal 100 or an application program being executed.

Meanwhile, the touch sensor and the proximity sensor described above may be independently or combined, and may be a short (or tap) touch, a long touch, a multi touch, a drag touch on a touch screen. ), Flick touch, pinch-in touch, pinch-out touch, swipe touch, hovering touch, etc. A touch can be sensed.

The ultrasonic sensor may recognize location information of a sensing object using ultrasonic waves. On the other hand, the controller 180 can calculate the position of the wave generation source through the information detected from the optical sensor and the plurality of ultrasonic sensors. The position of the wave source can be calculated using the property that the light is much faster than the ultrasonic wave, that is, the time that the light reaches the optical sensor is much faster than the time when the ultrasonic wave reaches the ultrasonic sensor. More specifically, the position of the wave generation source may be calculated using a time difference from the time when the ultrasonic wave reaches the light as the reference signal.

On the other hand, the camera 121, which has been described as the configuration of the input unit 120, includes at least one of a camera sensor (eg, CCD, CMOS, etc.), a photo sensor (or image sensor), and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to detect a touch of a sensing object with respect to a 3D stereoscopic image. The photo sensor may be stacked on a display element, which is configured to scan a movement of a sensing object in proximity to the touch screen. More specifically, the photo sensor mounts a photo diode and a transistor (TR) in a row / column and scans contents mounted on the photo sensor by using an electrical signal that varies according to the amount of light applied to the photo diode. That is, the photo sensor calculates coordinates of the sensing object according to the amount of light change, and thus, the position information of the sensing object can be obtained.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100 or user interface (UI) and graphical user interface (GUI) information according to the execution screen information. .

In addition, the display unit 151 may be configured as a stereoscopic display unit for displaying a stereoscopic image.

The stereoscopic display unit may be a three-dimensional display method such as a stereoscopic method (glasses method), an auto stereoscopic method (glasses-free method), a projection method (holographic method).

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output unit 152 may also output a sound signal related to a function (for example, a call signal reception sound or a message reception sound) performed in the mobile terminal 100. The sound output unit 152 may include a receiver, a speaker, a buzzer, and the like.

The haptic module 153 generates various haptic effects that a user can feel. A representative example of the tactile effect generated by the haptic module 153 may be vibration. The intensity and pattern of vibration generated by the haptic module 153 may be controlled by the user's selection or the setting of the controller. For example, the haptic module 153 may synthesize different vibrations and output or sequentially output them.

In addition to the vibration, the haptic module 153 is a pin array that vertically moves with respect to the contacted skin surface, the blowing force or suction force of air through the injection or inlet, the grazing to the skin surface, the contact of the electrode, the electrostatic force, and the like. Various tactile effects can be produced, such as the effects of the heat-absorbing effect and the effect of reproducing a sense of cold using the elements capable of absorbing heat or generating heat.

The haptic module 153 may not only deliver a tactile effect through direct contact, but also may allow a user to feel the tactile effect through a muscle sense such as a finger or an arm. Two or more haptic modules 153 may be provided according to a configuration aspect of the mobile terminal 100.

The light output unit 154 outputs a signal for notifying occurrence of an event by using light of a light source of the mobile terminal 100. Examples of events occurring in the mobile terminal 100 may be message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like.

The signal output from the light output unit 154 is implemented as the mobile terminal 100 emits light of a single color or a plurality of colors to the front or the rear. The signal output may be terminated by the mobile terminal 100 detecting the user's event confirmation.

The interface unit 160 serves as a path to all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device, receives power, transfers the power to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an external device. For example, a port connecting a device equipped with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, and an identification module. The port, audio input / output (I / O) port, video input / output (I / O) port, earphone port, etc. may be included in the interface unit 160.

On the other hand, the identification module is a chip that stores a variety of information for authenticating the usage rights of the mobile terminal 100, a user identification module (UIM), subscriber identity module (SIM), universal user authentication And a universal subscriber identity module (USIM). A device equipped with an identification module (hereinafter referred to as an 'identification device') may be manufactured in the form of a smart card. Therefore, the identification device may be connected to the mobile terminal 100 through the interface unit 160.

In addition, the interface unit 160 may be a passage for supplying power from the cradle to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or inputted from the cradle by a user. Various command signals may be a passage for transmitting to the mobile terminal 100. Various command signals or power input from the cradle may operate as signals for recognizing that the mobile terminal 100 is correctly mounted on the cradle.

The memory 170 may store a program for the operation of the controller 180 and may temporarily store input / output data (for example, a phone book, a message, a still image, a video, etc.). The memory 170 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

The memory 170 may include a flash memory type, a hard disk type, a solid state disk type, an SSD type, a silicon disk drive type, and a multimedia card micro type. ), Card-type memory (e.g., SD or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read It may include at least one type of storage medium of -only memory (PROM), programmable read-only memory (PROM), magnetic memory, magnetic disk and optical disk. The mobile terminal 100 may be operated in connection with a web storage that performs a storage function of the memory 170 on the Internet.

On the other hand, as described above, the controller 180 controls the operation related to the application program, and generally the overall operation of the mobile terminal 100. For example, if the state of the mobile terminal 100 satisfies a set condition, the controller 180 may execute or release a lock state that restricts input of a user's control command to applications.

In addition, the controller 180 may perform control and processing related to voice call, data communication, video call, or the like, or may perform pattern recognition processing for recognizing handwriting input or drawing input performed on a touch screen as text and images, respectively. Can be. Furthermore, the controller 180 may control any one or a plurality of components described above in order to implement various embodiments described below on the mobile terminal 100 according to the present invention.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component. The power supply unit 190 may include a battery, and the battery may be a built-in battery configured to be rechargeable, and may be detachably coupled to the terminal body for charging.

In addition, the power supply unit 190 may be provided with a connection port, the connection port may be configured as an example of the interface 160 that is electrically connected to the external charger for supplying power for charging the battery.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 uses one or more of an inductive coupling based on a magnetic induction phenomenon or a magnetic resonance coupling based on an electromagnetic resonance phenomenon from an external wireless power transmitter. Power can be delivered.

Meanwhile, various embodiments of the present disclosure may be implemented in a recording medium readable by a computer or a similar device using, for example, software, hardware, or a combination thereof.

Hereinafter, a structure of a mobile terminal 100 according to an embodiment of the present invention as described above with reference to FIG. 1A or a terminal in which the above-described components are disposed will be described with reference to FIGS. 1B and 1C.

1B and 1C, the disclosed mobile terminal 100 includes a bar terminal body. However, the present invention is not limited thereto, and the present invention can be applied to various structures such as a watch type, a clip type, a glass type, or a folder type, a flip type, a slide type, a swing type, a swivel type, and two or more bodies which are coupled to be movable relative to each other. . The following description will relate to a particular type of mobile terminal, but the description of a particular type of mobile terminal may generally apply to other types of mobile terminals.

Herein, the terminal body may be understood as a concept that refers to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (eg, a frame, a housing, a cover, etc.) forming an external appearance. As shown, the mobile terminal 100 may include a front case 101 and a rear case 102. Various electronic components are disposed in the internal space formed by the combination of the front case 101 and the rear case 102. At least one middle case may be additionally disposed between the front case 101 and the rear case 102.

The display unit 151 may be disposed in front of the terminal body to output information. As shown, the window 151a of the display unit 151 may be mounted to the front case 101 to form a front surface of the terminal body together with the front case 101.

In some cases, an electronic component may be mounted on the rear case 102. Electronic components attachable to the rear case 102 include a removable battery, an identification module, a memory card, and the like. In this case, the rear cover 102 may be detachably coupled to the rear case 102 to cover the mounted electronic component. Therefore, when the rear cover 300 is separated from the rear case 102, the electronic components mounted on the rear case 102 are exposed to the outside.

As illustrated, when the rear cover 103 is coupled to the rear case 102, a portion of the side surface of the rear case 102 may be exposed. In some cases, the rear case 102 may be completely covered by the rear cover 103 during the coupling. On the other hand, the rear cover 103 may be provided with an opening for exposing the camera 121b or the sound output unit 152b to the outside.

The cases 101, 102, and 103 may be formed by injecting a synthetic resin, or may be formed of a metal, for example, stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case may provide the internal space, unlike the above example in which a plurality of cases provide an internal space for accommodating various electronic components. In this case, the mobile terminal 100 of the unibody that the synthetic resin or metal from the side to the rear may be implemented.

On the other hand, the mobile terminal 100 may be provided with a waterproof portion (not shown) to prevent water from seeping into the terminal body. For example, the waterproof portion is provided between the window 151a and the front case 101, between the front case 101 and the rear case 102 or between the rear case 102 and the rear cover 103, and a combination thereof. It may include a waterproof member for sealing the inner space.

The mobile terminal 100 includes a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, an optical output unit 154, and first and second units. The cameras 121a and 121b, the first and second manipulation units 123a and 123b, the microphone 122, the interface unit 160, and the like may be provided.

Hereinafter, as illustrated in FIGS. 1B and 1C, the display unit 151, the first sound output unit 152a, the proximity sensor 141, the illuminance sensor 142, and the light output unit may be disposed on the front surface of the terminal body. 154, the first camera 121a and the first operation unit 123a are disposed, and the second operation unit 123b, the microphone 122, and the interface unit 160 are disposed on the side of the terminal body. The mobile terminal 100 in which the second sound output unit 152b and the second camera 121b are disposed on the rear surface of the mobile terminal 100 will be described as an example.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed or disposed on other sides. For example, the first manipulation unit 123a may not be provided on the front surface of the terminal body, and the second sound output unit 152b may be provided on the side of the terminal body instead of the rear surface of the terminal body.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100 or user interface (UI) and graphical user interface (GUI) information according to the execution screen information. .

The display unit 151 may include a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible display). display, a 3D display, or an e-ink display.

In addition, two or more display units 151 may exist according to an implementation form of the mobile terminal 100. In this case, the plurality of display units may be spaced apart or integrally disposed on one surface of the mobile terminal 100, or may be disposed on different surfaces.

The display unit 151 may include a touch sensor that senses a touch on the display unit 151 so as to receive a control command by a touch method. By using this, when a touch is made to the display unit 151, the touch sensor may sense the touch, and the controller 180 may generate a control command corresponding to the touch based on the touch sensor. The content input by the touch method may be letters or numbers, or menu items that can be indicated or designated in various modes.

On the other hand, the touch sensor is formed of a film having a touch pattern and disposed between the window 151a and the display (not shown) on the back of the window 151a, or a metal wire directly patterned on the back of the window 151a. It can also be Alternatively, the touch sensor may be integrally formed with the display. For example, the touch sensor may be disposed on a substrate of the display or provided inside the display.

As such, the display unit 151 may form a touch screen together with the touch sensor, and in this case, the touch screen may function as the user input unit 123 (see FIG. 1A). In some cases, the touch screen may replace at least some functions of the first manipulation unit 123a. Hereinafter, for convenience of description, the display unit (display module) for outputting the image and the touch sensor are collectively referred to as a touch screen 151.

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to the user's ear, and the second sound output unit 152b may be a loud speaker for outputting various alarm sounds or multimedia reproduction sounds. It can be implemented in the form of).

A sound hole for emitting sound generated from the first sound output unit 152a may be formed in the window 151a of the display unit 151. However, the present invention is not limited thereto, and the sound may be configured to be emitted along an assembly gap between the structures (for example, a gap between the window 151a and the front case 101). In this case, an externally formed hole may be invisible or hidden for sound output, thereby simplifying the appearance of the mobile terminal 100.

The light output unit 154 is configured to output light for notifying when an event occurs. Examples of the event may include message reception, call signal reception, missed call, alarm, schedule notification, email reception, information reception through an application, and the like. When the user's event confirmation is detected, the controller 180 may control the light output unit 154 to end the light output.

The first camera 121a processes an image frame of a still image or a moving image obtained by the image sensor in a shooting mode or a video call mode. The processed image frame may be displayed on the display unit 151 and stored in the memory 170.

The first and second manipulation units 123a and 123b may be collectively referred to as a manipulating portion as an example of the user input unit 123 operated to receive a command for controlling the operation of the mobile terminal 100. have. The first and second manipulation units 123a and 123b may be adopted in any manner as long as the user is tactile manner such as touch, push, scroll, and the like while the user is tactile. In addition, the first and second manipulation units 123a and 123b may be employed in such a manner that the first and second manipulation units 123a and 123b are operated without a tactile feeling by the user through proximity touch, hovering touch, or the like.

In the drawing, the first operation unit 123a is illustrated as being a touch key, but the present invention is not limited thereto. For example, the first manipulation unit 123a may be a mechanical key or a combination of a touch key and a push key.

The contents input by the first and second manipulation units 123a and 123b may be variously set. For example, the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, etc., and the second operation unit 123b is output from the first or second sound output units 152a and 152b. The user may receive a command such as adjusting the volume of the sound and switching to the touch recognition mode of the display unit 151.

Meanwhile, as another example of the user input unit 123, a rear input unit (not shown) may be provided on the rear surface of the terminal body. The rear input unit is manipulated to receive a command for controlling the operation of the mobile terminal 100, and the input contents may be variously set. For example, commands such as power on / off, start, end, scroll, etc., control of the volume of sound output from the first and second sound output units 152a and 152b, and the touch recognition mode of the display unit 151. Commands such as switching can be received. The rear input unit may be implemented in a form capable of input by touch input, push input, or a combination thereof.

The rear input unit may be disposed to overlap the front display unit 151 in the thickness direction of the terminal body. For example, the rear input unit may be disposed at the rear upper end of the terminal body so that the user can easily manipulate the index body when the user grips the terminal body with one hand. However, the present invention is not necessarily limited thereto, and the position of the rear input unit may be changed.

As such, when the rear input unit is provided at the rear of the terminal body, a new type user interface using the same may be implemented. In addition, when the touch screen or the rear input unit described above replaces at least some functions of the first operation unit 123a provided in the front of the terminal body, the first operation unit 123a is not disposed on the front of the terminal body. The display unit 151 may be configured with a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing a user's fingerprint, and the controller 180 may use fingerprint information detected through the fingerprint recognition sensor as an authentication means. The fingerprint recognition sensor may be embedded in the display unit 151 or the user input unit 123.

The microphone 122 is configured to receive a user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations and configured to receive stereo sound.

The interface unit 160 serves as a path for connecting the mobile terminal 100 to an external device. For example, the interface unit 160 may be connected to another device (eg, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), or a Bluetooth port (Bluetooth). Port), a wireless LAN port, or the like, or a power supply terminal for supplying power to the mobile terminal 100. The interface unit 160 may be implemented in the form of a socket for receiving an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for storing information.

The second camera 121b may be disposed on the rear surface of the terminal body. In this case, the second camera 121b has a photographing direction substantially opposite to that of the first camera 121a.

The second camera 121b may include a plurality of lenses arranged along at least one line. The plurality of lenses may be arranged in a matrix format. Such a camera may be referred to as an 'array camera'. When the second camera 121b is configured as an array camera, images may be photographed in various ways using a plurality of lenses, and images of better quality may be obtained.

The flash 124 may be disposed adjacent to the second camera 121b. The flash 124 emits light toward the subject when the subject is photographed by the second camera 121b.

The second sound output unit 152b may be additionally disposed on the terminal body. The second sound output unit 152b may implement a stereo function together with the first sound output unit 152a and may be used to implement a speakerphone mode during a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be built in the terminal body or formed in the case. For example, an antenna that forms part of the broadcast receiving module 111 (refer to FIG. 1A) may be configured to be pulled out from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner side of the rear cover 300, or may be configured such that a case including a conductive material functions as an antenna.

The terminal body is provided with a power supply unit 190 (see FIG. 1A) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 embedded in the terminal body or detachably configured from the outside of the terminal body.

The battery 191 may be configured to receive power through a power cable connected to the interface unit 160. In addition, the battery 191 may be configured to enable wireless charging through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

Meanwhile, in the drawing, the rear cover 300 is coupled to the rear case 102 to cover the battery 191 to limit the detachment of the battery 191 and to protect the battery 191 from external shocks and foreign substances. To illustrate. When the battery 191 is detachably configured to the terminal body, the rear cover 300 may be detachably coupled to the rear case 102.

An accessory may be added to the mobile terminal 100 to protect the appearance or to assist or expand the function of the mobile terminal 100. An example of such an accessory may be a cover or pouch that covers or accommodates at least one surface of the mobile terminal 100. The cover or pouch may be configured to be linked with the display unit 151 to expand the function of the mobile terminal 100. Another example of the accessory may be a touch pen for assisting or extending a touch input to a touch screen.

2 shows an exploded view of the mobile terminal according to the present invention.

The mobile terminal 100 has an internal space formed by the front case 101 and the rear cover 103, and has an internal frame 200 installed therein.

An internal frame 200 for supporting the circuit board 180 and the display 151 is installed inside the mobile terminal 100, and a display unit 151 is located on one surface of the internal frame 200, and The other surface of the frame 200 has a structure in which the circuit board 180 is located.

The inner frame 200 is formed to form a side appearance of the mobile mobile 100. The side surface of the mobile terminal 100 may mean a surface connecting the front and the rear surface, and when the metal terminal is made of a metal member, the mobile terminal 100 may perform a role as a radiator of the antenna. An ear jack hole or a USB port may be formed at the side of the inner frame 200.

The circuit board 180 and a battery (not shown) may be positioned between the inner frame 200 and the front case 101. In the internal frame 200, a battery insertion hole 201 may be formed to position a battery (not shown).

The circuit board 180 is formed in an approximately 'C' or 'C' shape and is electrically connected to the internal frame 200. The rear surface of the inner frame 200 may be covered by the rear cover 103. A plurality of electronic devices (not shown) including a driving chip (not shown) may be disposed on the circuit board 180.

The circuit board 180 is configured to process radio signals (or radio electromagnetic waves) transmitted and received by the antenna. For the processing of the wireless signal, a plurality of transmission and reception circuits may be formed or mounted on the circuit board 180.

The front of the front case 101 may be provided with a display 151 consisting of a display panel (not shown) and a window (not shown). A receiver (not shown) for sound output may be installed at one upper side of the front case 101. The rear cover 103 may be positioned on the rear portion of the inner frame 200, and the outer surface of the inner frame 200 and the inner surface of the rear cover 103 may be spaced apart from each other by a predetermined interval. Here, the outer surface of the inner frame 200 refers to the surface facing the rear cover 103, the inner surface of the rear cover 103 is the inner surface of the rear cover 103 facing the inner frame 200. it means.

3 is a view illustrating a state of the inner frame 200.

The inner frame 200 of the mobile terminal according to the present invention may be formed such that a metal layer 220 having a predetermined thickness is formed on the base 210. Thus, the inside and the outside of the inner frame 200 will be made of different materials.

The base 210 may be made of a polymer material. Here, the polymer material means a plastic material made of a polymer such as PVC, and as the base 210 of the inner frame 200 is made of a polymer material, the inner frame 200 may be light in weight.

The polymer material, which is a material constituting the base 210, will not be limited as long as it is a material having strong heat resistance and rigidity. In addition, the base 210 may be manufactured to have a shape of the inner frame 200 by injection used when manufacturing a plastic product. Since the internal frame 200 is made of metal, various processes such as forging, cutting, and processing are required, so that the manufacturing process is complicated compared to plastic injection. Thus, the inner frame 200 according to the present invention, since the base 210 can be simply manufactured through a plastic injection process, it is possible to simplify the manufacturing process and simplify the production process.

The metal layer 220 may be formed on the surface of the inner frame 200. The metal layer 220 may be formed to cover the surface of the base 210. In addition, the metal layer 220 may be formed only in a selected specific region of the surface of the base 210 or may be laminated to have a predetermined thickness only in the remaining regions except for the selected specific region. In this manner, the metal layer 220 may be selectively formed on the surface of the base 210 and may be disposed on the base 210 to have a predetermined pattern.

Meanwhile, the inner frame 200 may include a side portion 201 and a bottom portion 202.

As shown in Figure 3, the side portion 201 is formed in a ring shape to form the side of the terminal body, the side portion 201 may be formed to have an inner side toward the inner side and the outer side forming the side of the main body.

The outer surface of the side portion 201 forms the side of the terminal body and the outer surface may be formed in a curved shape. In addition, the outer surface may be configured to have different curvatures according to a specific position, thereby contributing to improving the aesthetics of the mobile terminal exposed to the outside. Since the inner surface of the side portion 201 has to be formed structures for supporting the components of the mobile terminal it is preferable that the inner surface is made of a flat shape.

The bottom portion 202 may be integrally formed with the side portion 201. The bottom 202 is configured to support the display 151 and includes a plurality of holes. The hole is for assembling the case, the circuit board 180, and the like, and may correspond to an opening for mounting the electronic component and the flexible circuit board 180. Each hole may be formed in a different size. In addition, the bottom portion 202 is formed so that the battery receiving hole to accommodate the battery.

4A is a cross-sectional view of the inner frame 200 cut out based on the line A of FIG. 3, and FIG. 4B is a cross-sectional view of the inner frame 200 cut out based on the line B of FIG. 3.

As described above, the inner frame 200 has a structure in which a metal layer 220 formed to cover the surface of the base 210 on the base 210 made of a polymer material. The metal layer 220 may be formed to cover the entire surface of the base 210, and the metal layer 220 may be formed except for a region selected as shown in FIG. 3 to enable a specific function to be exhibited by the metal layer 220. The metal layer 220 may be formed in a selected region of the surface of the base 210, and may be formed on the surface of the base 210 to have a set pattern.

The surface of the base 210 may be formed to form the metal layer 220 by a deposition method. Here, vapor deposition means the method of heating a metal to high temperature, vaporizing it, and sticking a metal in thin film form with the vapor | steam.

At this time, the surface of the base 210 may be made to have a set roughness value to be in close contact with the metal layer 220. In order for the metal layer 220 to be in close contact with the surface of the base 210, the surface of the base 210 should be made uniform.

The metal layer 220 may be formed to have a thickness of approximately 25 to 50 μm on the surface of the base 210.

This is a numerical value determined by the manufacturing method of the inner frame 200 to be described later, sanding and polishing for securing reliability and antenna performance, anodizing on the deposited metal layer 220, and improving appearance. This value is determined in consideration of the thickness according to the treatment.

The metal layer 220 is required to deposit the metal layer 220 to a thickness of at least 5 μm in order to ensure reliability, which is to ensure the reliability of forming the metal layer 220 of roughness and uniform thickness of the base 210. .

In addition, in order to secure antenna performance, the metal layer 220 needs to have a thickness of about 10 μm or more, and sanding and polishing is performed on the deposited metal layer 220 to improve anodization and appearance. For the treatment, the thickness of the metal layer 220 of at least 15 μm is required in consideration of the loss of the metal layer 220 having a thickness of about 5 μm during the process.

Accordingly, since the metal layer 220 requires at least 5 μm of the metal layer 220 and at least 20 μm of the thickness of the metal layer 220 according to antenna performance and post-processing, the metal layer 220 may be formed of the base 210. It is necessary to be configured to have a thickness of approximately 25 μm or more on the surface of the. In addition, considering the error of the mass production process, it will be preferable that the metal layer 220 having a thickness of approximately 25 to 50 μm is formed on the base 210.

4A and 4B, the surface of the base 210 is formed to cover the metal layer 220, and the metal layer 220 disposed adjacent to the antenna structure installed on the circuit board 180 extends from the antenna structure. It is connected to the connecting member 182, it is possible to receive a radio signal radiated from the antenna structure. Accordingly, the wireless signal transmitted along the metal layer 220 serves to radiate the wireless communication signal to the outside through the metal layer 220 formed on the side of the inner frame 200. At this time, if the metal layer 220 of a predetermined pattern is formed on the base 210 to be adjacent to the antenna structure, it will be possible to form a variety of radio wave propagation characteristics. The pattern of the metal layer 220 to be formed on the base 210 is made possible by masking to distinguish between the region where the metal layer 220 is to be formed on the base 210 and the region not to be formed. In consideration, it will be possible to implement the metal layer 220 to have a variety of patterns.

Accordingly, the metal layer 220 may be formed on the base 210 except for a specific region, and as shown in FIGS. 4A and 4B, the metal layer 220 adjacent to the connecting member 182 may be disposed between d1. It is possible to be formed in the region between the region of and d2, respectively.

The metal layer 220 may be made of any one of aluminum, stainless steel, titanium, and tungsten, and may be made of an alloy in which the metals are combined at a set ratio.

The inner frame 200 may include a side portion 201 and a bottom portion 202. The metal layer 220 formed on the side portion 201 and the bottom portion 202 may be made of different metals.

For example, the metal layer 220 made of titanium may be formed on the side portion 201, and the metal layer 220 made of aluminum may be formed on the bottom portion 202. Thus, by exposing the relatively high strength titanium metal to the outside it is possible to improve the strength of the internal frame 200 to prevent damage by external forces.

In addition, the bottom portion 202 may be formed with a metal layer 220 made of a relatively light metal, thereby reducing the overall weight of the inner frame 200. For example, the bottom portion 202 is formed in the aluminum metal layer 220 to reduce the overall weight of the inner frame 200, while the heat conduction performance is easy to conduct the heat generated from the circuit board 180 of the mobile terminal Can be secured.

5 is a conceptual diagram illustrating a state in which the slit 221 is formed on the outer side surface of the inner frame 200.

To achieve antenna performance, it is necessary to cut a specific portion of the metal material to form an insulating layer. In the conventional method of manufacturing the inner frame 200 with metal, a polymer insulator should be inserted into the slit 221 formed on the outer side of the inner frame, and a structure for bonding pretreatment and preventing separation of the metal and the polymer insulator is required. Since the width of the slit 221 should be 2 mm or more, it has a disadvantage that is not good in appearance.

The inner frame 200 according to the present invention may be formed so that the slit 221 having a predetermined width on the outside. Even when the metal layer 220 is to be used as an antenna radiator, it is required to segment a specific position of the metal layer 220 to realize antenna performance. In this case, since the base 210 made of a polymer material is positioned in the inner frame 200 according to the present invention, the slit 221 may be formed by simply etching the metal layer 220 using a laser. Could be. Accordingly, the antenna performance can be realized while minimizing the width of the slit 221, and it is also excellent in aesthetic appearance and has the advantage of simplifying the manufacturing process.

6A and 6B illustrate a state in which the circuit board 180 is coupled to the internal frame 200.

In the inner frame 200 according to the present invention, it is possible to use the base 210 made of a polymer material as a boss for screwing. A protrusion (not shown) may be formed in the base 210 of the inner frame 200, and the protrusion (not shown) is positioned to contact the circuit board 180 and is connected to the circuit board 180 through the fastening member 183. It is possible to combine with

As shown in FIG. 6A, the metal layer 220 formed on the outside of the protrusion (not shown) may be connected to the circuit board 180 to allow a current to flow therethrough, and the circuit board 180 may have an internal frame 200. It is also possible to electrically connect with other elements positioned in the bottom portion 202 of the metal layer 220. In this case, since the configuration for electrically connecting the circuit board 180 and other electronic elements is unnecessary, the manufacturing cost can be reduced.

In addition, as shown in FIG. 6B, the metal layer 220 may not be formed outside the protruding portion, but may be insulated from each other even when the metal layer 220 is positioned to be in contact with the circuit board 180. This is because the base 210 is made of a polymer material which is an insulating material. Therefore, since it is unnecessary to place a separate insulating material between the circuit board 180 and the protrusion, it is possible to reduce the manufacturing cost.

7 is a diagram illustrating an internal cross section of the mobile terminal.

By forming the metal layer 220 on the side portion 201 and the bottom portion 202 of the inner frame 200 according to the present invention, heat generated from the electronic device 184 mounted on the circuit board 180 is transferred to the metal layer 220. Can be configured to be delivered along.

The metal layer 220 formed on the surface of the base 210 to cover the surface of the base 210 is positioned adjacent to the electronic device 184 that generates high heat in the circuit board 180, thereby forming the electronic device 184. It can be configured to receive heat generated from the. Since the metal layer 220 is made of a material having high thermal conductivity, such as titanium, aluminum, copper, or stainless steel, heat generated from the electronic device 184 can be effectively conducted along the metal layer 220, thereby enabling effective heat dissipation. Done.

Similarly, even when the metal layer 220 formed on the base 210 is brought into contact with the circuit board 180 through the fastening member 183, the heat generated from the circuit board 180 is made of a material having high thermal conductivity. Since it can be transferred along the metal layer 220 configured, heat generated from the electronic device 184 can be effectively dissipated.

In this case, a heat concentration prevention region in which the metal layer 220 is not formed is formed in the base 210 adjacent to the AP mounted on the circuit board 180 where the performance decreases according to the high temperature, thereby degrading the performance according to the high temperature. Can be prevented. As shown in FIG. 7, when the metal layer 220 is not formed in one region of the base 210, since the thermal conductivity of the base 210 made of a polymer material is low, an increase in temperature of the region may be prevented. You will get the effect.

Hereinafter, a method of manufacturing the inner frame 200 according to the present invention will be described.

8 is a view illustrating a step of manufacturing the inner frame 200 according to the present invention, Figure 9 is a flow chart of a method of manufacturing the inner frame 200.

As described above, the inner frame 200 provided in the mobile terminal, the metal layer 220 is formed on the base 210 made of a polymer material to have a predetermined thickness. In addition, the metal layer 220 formed on the base 210 may be formed to have a set pattern in consideration of the propagation characteristics and heat transfer characteristics of the antenna.

As shown in FIG. 8, the base 210 made of a polymer material may be made of an injection method and may be formed of a material having heat resistance and rigidity to prevent deformation even when the metal layer 220 is deposited. In addition, a masking jig may be mounted on the surface of the base 210 in order to distinguish between the region where the metal layer 220 is to be formed and the region where the metal layer 220 is not formed. Thereafter, the magnetron PVD facility is applied to form the metal layer 220 to a thickness of approximately 25 to 50 μm. When the masking jig attached to the surface of the base 210 is detached, the surface of the base 210 is formed on the surface of the base 210. Since the region in which the metal layer 220 is formed and the region in which the metal layer 220 is not formed is complex, it may be possible to be used as an antenna characteristic, an energization / insulation structure, and a heat transfer / heat shield structure.

Through this, the manufacturing method of the inner frame 200 according to the present invention, the process of CNC machining, metal bonding, plating / injection used in the conventional manufacturing method of the inner frame 200 made only of metal is unnecessary, these processes Compared with the process, the number of processes is small and the processing time is short, which reduces the manufacturing cost.

In addition, according to the present invention, since the metal layer 220 is formed only in a specific region of the inner frame 200, the antenna layer may be used as an antenna characteristic, an energization / insulation structure, and a heat transfer / heat shield structure. Since it may not be added separately, there is an advantage in the manufacturing cost.

9, the method of manufacturing the inner frame 200 will be described in detail. The inner frame 200 may be manufactured by injecting a base 210 made of a polymer material into a surface of a base 210 using a metal layer ( Mounting and masking the jig on the base 210 to selectively form 220, polishing the surface of the base 210 to be uniform, and then sanding the surface of the base 210 to have a set roughness; A first surface treatment step of cleaning the surface of the 210, the step of forming a metal layer 220 consisting of any one of aluminum, stainless steel, titanium, tungsten on the surface of the base 210, the oxide film formed on the metal layer 220 A second surface treatment step for removing the surface area and securing a uniform surface, removing the jig seated on the base 210, and confirming characteristics of the material of the metal layer 220 formed on the base 210. Surface treatment of the metal layer 220 to form a slit 221 on the metal layer 220 formed on the base 210 to segment the metal layer 220, and the base exposed to the outside by the slit 221. It may be prepared through a post-segmentation step to prevent damage to the (210).

At this time, through mounting and masking the jig on the base 210, the user will be able to form the metal layer 220 on the base 210 to have a desired pattern. The height of the masking jig is a factor that affects the damage of the metal layer 220.

After polishing the surface of the base 210 to be uniform, and then sanding to form a roughness set on the surface of the base 210, the surface of the base 210 is a process for improving the interfacial adhesion of different materials. The surface of the base 210 may be uniformly polished through a washing and polishing process, and a constant roughness may be formed on the surface of the base 210 through a sanding process to increase the contact area between the metal layer 220 and the surface of the base 210. By doing so, adhesiveness can be improved.

The first surface treatment step of washing the surface of the base 210 refers to a treatment process of washing the surface of the base 210 of the polymer material and modifying the surface.

Forming the metal layer 220 may be formed of any one of aluminum, stainless steel, titanium, tungsten, or a mixture of these materials on the surface of the base 210, It may be formed to have a thickness of approximately 25-50 μm on the surface.

The second surface treatment step is a process for removing an oxide film of the metal layer 220 formed on the surface of the base 210 or securing a uniform surface, and may be performed using a cotton cloth or a bead. .

The detaching of the jig seated on the base 210 is a process for forming the metal layer 220 only in a region desired by the user in the base 210. According to this process, the metal layer 220 is disposed only in a specific region of the base 210. This will be able to be formed.

In the surface treatment step of the metal layer 220, anodizing, PVD, or the like may be treated according to the constituents of the metal layer 220 to secure material properties of the metal layer 220, thereby securing physical properties of the metal layer 220. It is possible to configure various colors of the appearance.

Segmenting the metal layer 220 so that the slits 221 are formed in the metal layer 220 may be performed by etching the metal layer 220 to realize antenna characteristics, insulation, and conduction characteristics. The process of revealing. In order to prevent damage to the base 210 exposed to the outside through the segmentation step of the metal layer 220, it is necessary to perform a post-segmentation step such as a water repellent treatment process.

It is apparent to those skilled in the art that the present invention can be embodied in other specific forms without departing from the spirit and essential features of the present invention.

In addition, the above detailed description should not be interpreted as limiting in all aspects and should be considered as illustrative. The scope of the invention should be determined by reasonable interpretation of the appended claims, and all changes within the equivalent scope of the invention are included in the scope of the invention.

The present invention may be variously applied and applied in the industrial field for producing a mobile terminal including an inner frame.

Claims (11)

1. Terminal body;

   An inner frame installed in the terminal body to support the terminal body; And

   A circuit board supported by the inner frame,

   The inner frame is a mobile terminal, characterized in that the metal layer is formed on the base made of a polymer material to cover the surface of the base.
2. The method of claim 1,

   The metal layer is selectively formed on the surface of the base, characterized in that located on the surface of the base to have a set pattern.
3. The method of claim 1,

   The surface of the base is a mobile terminal, characterized in that it has a set roughness value to be in close contact with the metal layer.
4. The method of claim 1,

   The metal layer is connected to the antenna structure mounted on the circuit board, the mobile terminal, characterized in that for radiating the radio communication signal received from the antenna structure to the outside.
5. The method of claim 1,

   The inner frame may include a ring-shaped side portion that forms a side surface of the terminal body and a bottom portion that is coupled to the side portion and supports the display portion.
6. The method of claim 5,

   A mobile terminal, characterized in that the circuit board is fixed by screwing to one side of the bottom of the inner frame to penetrate the metal layer.
7. The method of claim 5,

   Mobile terminal, characterized in that the slits having a set width is formed on one side of the side portion to expose the base to the outside.
8. The method of claim 1,

   And the inner frame and the circuit board are adjacent to each other, such that heat generated from the circuit board is transferred along the metal layer.
9. The method of claim 1,

   The metal layer is a mobile terminal, characterized in that made of any one of aluminum, stainless steel, titanium and tungsten.
10. The method of claim 1,

    The metal layer is a mobile terminal, characterized in that it is formed to have a thickness of 25 to 50 ㎛ on the surface of the inner frame.
11. Forming a base made of a polymer material;

    Masking by mounting a jig on the base to selectively form a metal layer on the surface of the base;

    Polishing the surface of the base to be uniform and then sanding the surface of the base to have a set roughness;

    A first surface treatment step of washing the surface of the base;

    Forming a metal layer formed of any one of aluminum, stainless steel, titanium, and tungsten on the surface of the base;

    A second surface treatment step of removing an oxide film formed on the metal layer and securing a uniform surface;

    Detaching the jig seated on the base;

    A metal layer surface treatment step for securing a characteristic of a material of the metal layer formed on the base;

    Segmenting the metal layer by forming slits in the metal layer formed on the base; And

    Method of producing an inner frame comprising a post-segmentation step to prevent damage to the base exposed to the outside by the slit.

Images