KR20170072724A - A mobile terminal comprising a case and a manufacturing method thereof - Google Patents

Abstract

In a mobile terminal having a case that forms an outer appearance of a terminal body according to the present invention, the case includes a rear portion and a side portion of a first metal material, and the rear portion includes an antenna region, A backside case; And an inner case of a second metal material which is made of a metal material different from the first metal material mounted inside the rear case, wherein the antenna area is injected as a non-metallic member, It is possible to solve the problem that it is difficult for the case to be manufactured integrally with a non-metallic material in order to maintain the electrical performance of the antenna.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a mobile terminal having a case,

The present invention relates to a mobile terminal having a metal case and a manufacturing method thereof.

A terminal can be divided into a mobile terminal (mobile / portable terminal) and a stationary terminal according to whether the terminal can be moved. The mobile terminal can be divided into a handheld terminal and a vehicle mounted terminal according to whether the user can directly carry the mobile terminal.

The functions of mobile terminals are diversified. For example, there are data and voice communication, photographing and video shooting through a camera, voice recording, music file playback through a speaker system, and outputting an image or video on a display unit. Some terminals are equipped with an electronic game play function or a multimedia player function. In particular, modern mobile terminals can receive multicast signals that provide visual content such as broadcast and video or television programs.

Such a terminal has various functions, for example, in the form of a multimedia device having multiple functions such as photographing and photographing of a moving picture, reproduction of a music or video file, reception of a game and broadcasting, etc. .

In order to support and enhance the functionality of such a mobile terminal, it may be considered to improve the structural and / or software portion of the terminal.

Such a mobile terminal may be at least partially made of a metal material in view of prevention of appearance damage due to use and design. At this time, due to the metal case, the mobile terminal has a problem that the electrical characteristics of the antenna for transmitting or receiving electromagnetic waves are affected.

The present invention is directed to solving the above-mentioned problems and other problems. Another object of the present invention is to provide a mobile terminal having a metal case and a method of manufacturing the same.

According to an aspect of the present invention, there is provided a mobile terminal having a case that forms an outer appearance of a terminal body, the case including a rear portion and a side portion of a first metal material, A backside case including an antenna area where an antenna is received and removed; And an inner case of a second metal material which is made of a metal material different from the first metal material mounted inside the rear case, wherein the antenna area is injected as a non-metallic member, It is possible to solve the problem that it is difficult for the case to be manufactured integrally with a non-metallic material in order to maintain the electrical performance of the antenna.

According to one embodiment, the rear case is manufactured by press working, and the inner case can be manufactured by die casting.

According to one embodiment, the rear case may further include an opening for exposing the built-in electronic component to the outside.

According to one embodiment, the rear case and the inner case may be joined by a conductive bonding liquid.

According to one embodiment, the first metal material may be at least one of aluminum (Al), stainless steel (SUS) and titanium (Ti), and the second metal may be magnesium (Mg) .

According to one embodiment, the metal may be removed from the lower end portion of the rear case to be injected into a non-metallic member.

According to one embodiment, the case may further include a rear case to which the rear case is detachably coupled.

According to another aspect of the present invention, there is provided a method of manufacturing a case of a mobile terminal, the method comprising: preparing a rear case including a rear portion and a side portion of a first metal material; A metal removing step of removing metal from an antenna area corresponding to an area where the antenna of the rear case is received; An inner case mounting step of mounting an inner case of a second metal material, which is a metal material different from the first metal material, to the rear case; And generating a non-metal region by radiating the antenna region of the rear case with a non-metallic member.

According to one embodiment, the rear case manufacturing process is manufactured by press working, and the inner case can be manufactured by die casting.

According to an embodiment of the present invention, the metal removing process may further include forming an opening to form an opening for exposing the embedded electronic component to the outside.

According to one embodiment, the inner case mounting process is characterized in that the rear case and the inner case are bonded by a conductive bonding liquid.

According to one embodiment, the first metal material may be at least one of aluminum (Al), stainless steel (SUS) and titanium (Ti), and the second metal may be magnesium (Mg) .

According to an embodiment, the non-metal region generating step may further include a step of removing the metal from the lower end of the rear case and injecting the metal into the non-metal member.

According to an embodiment of the present invention, the rear case may be detachably coupled to the rear case.

Effects of the mobile terminal having the metal case according to the present invention and the manufacturing method thereof will be described as follows.

According to at least one of the embodiments of the present invention, it is possible to solve the problem that it is difficult for the rear case, which is formed of a metal material, to be manufactured integrally with a non-metallic material in order to maintain the electrical performance of the antenna.

In addition, according to at least one embodiment of the present invention, it is possible to solve the increase in the time and cost of the case manufacturing and the hassle of the mold making in the terminal equipped with the metal case.

1 is a block diagram illustrating a mobile terminal according to the present invention.
FIGS. 2 and 3 are conceptual diagrams showing an example of a mobile terminal related to the present invention from different directions.
FIG. 4 illustrates a process of processing an inner case and a rear case of a mobile terminal according to the present invention.
FIG. 5 illustrates a process of assembling an inner case and a rear case to a mobile terminal according to the present invention.
6 illustrates a method of joining an inner case and a rear case according to an embodiment of the present invention.
FIG. 7 is a conceptual diagram showing a slitting process according to an embodiment of the present invention.
8 shows a method of manufacturing a case of a mobile terminal according to an embodiment of the present invention.
9 illustrates a method of manufacturing a case of a mobile terminal according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to designate identical or similar elements, and redundant description thereof will be omitted. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role. In the following description of the embodiments of the present invention, a detailed description of related arts will be omitted when it is determined that the gist of the embodiments disclosed herein may be blurred. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. , ≪ / RTI > equivalents, and alternatives.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, a slate PC A tablet PC, an ultrabook, a wearable device such as a smartwatch, a smart glass, and a head mounted display (HMD). have.

However, it will be appreciated by those skilled in the art that the configuration according to the embodiments described herein may be applied to fixed terminals such as a digital TV, a desktop computer, a digital signage, and the like, will be.

FIG. 1 is a block diagram for explaining a mobile terminal according to the present invention, and FIGS. 2 and 3 are conceptual diagrams illustrating an example of a mobile terminal according to the present invention from different directions.

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 control unit 180, ), And the like. The components shown in FIG. 1 are not essential for implementing a mobile terminal, so that the mobile terminal described herein may have more or fewer components than the components listed above.

The wireless communication unit 110 may be connected between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and another mobile terminal 100 or between the mobile terminal 100 and the external server 100. [ Lt; RTI ID = 0.0 > wireless < / RTI > 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 a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, and a location information module 115 .

The input unit 120 includes a camera 121 or an image input unit for inputting a video signal, a microphone 122 for inputting an audio signal, an audio input unit, a user input unit 123 for receiving information from a user A touch key, a mechanical key, and the like). The voice data or image data collected by the input unit 120 may be analyzed and processed by a user's control command.

The sensing unit 140 may include at least one sensor for sensing at least one of information in the mobile terminal, surrounding environment information surrounding the mobile terminal, and user information. For example, the sensing unit 140 may include a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, A G-sensor, a gyroscope sensor, a motion sensor, an RGB sensor, an infrared sensor, a finger scan sensor, an ultrasonic sensor, A microphone 226, a battery gauge, an environmental sensor (for example, a barometer, a hygrometer, a thermometer, a radiation detection sensor, A thermal sensor, a gas sensor, etc.), a chemical sensor (e.g., an electronic nose, a healthcare sensor, a biometric sensor, etc.). Meanwhile, the mobile terminal disclosed in the present specification can combine and utilize information sensed by at least two of the sensors.

The output unit 150 includes at least one of a display unit 151, an acoustic output unit 152, a haptic tip module 153, and a light output unit 154 to generate an output related to visual, auditory, can do. The display unit 151 may have a mutual layer structure with the touch sensor or may be integrally formed to realize 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 a user and may provide an output interface between the mobile terminal 100 and a 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 is connected to a device having a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, And may include at least one of a port, an audio I / O port, a video I / O port, and an earphone port. In the mobile terminal 100, corresponding to the connection of the external device to the interface unit 160, it is possible to perform appropriate control related to the connected external device.

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 running on the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these applications may be downloaded from an external server via wireless communication. Also, at least a part of these application programs may exist on the mobile terminal 100 from the time of shipment for the basic functions (e.g., telephone call receiving function, message receiving function, and calling function) of the mobile terminal 100. Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and may be operated by the control unit 180 to perform the operation (or function) of the mobile terminal.

In addition to the operations related to the application program, the control unit 180 typically controls the overall operation of the mobile terminal 100. The control unit 180 may process or process signals, data, information, and the like input or output through the above-mentioned components, or may drive an application program stored in the memory 170 to provide or process appropriate information or functions to the user.

In addition, the controller 180 may control at least some of the components illustrated in FIG. 1 to drive an application program stored in the memory 170. FIG. In addition, the controller 180 may operate at least two of the components included in the mobile terminal 100 in combination with each other for driving the application program.

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

The power supply unit 190 receives an external power supply and / or an internal power supply under the control of the controller 180 and supplies power required for operation of each component.

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

2 and 3, the mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto and can be applied to various structures such as a folder type, a flip type, a slide type, a swing type, and a swivel type in which a watch type, a clip type, a glass type or two or more bodies are relatively movably coupled . A description of a particular type of mobile terminal, although relevant to a particular type of mobile terminal, is generally applicable to other types of mobile terminals.

Here, the terminal body can be understood as a concept of referring to the mobile terminal 100 as at least one aggregate.

The mobile terminal 100 includes a case (for example, a frame, a housing, a cover, and the like) that forms an 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 inner 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.

A display unit 151 is disposed on a front surface of the terminal body to output information. The window 151a of the display unit 151 may be mounted on the front case 101 to form a front surface of the terminal body together with the front case 101. [

In some cases, electronic components may also be mounted on the rear case 102. Electronic parts that can be mounted on the rear case 102 include detachable batteries, an identification module, a memory card, and the like. In this case, a rear cover 103 for covering the mounted electronic components can be detachably coupled to the rear case 102. Therefore, when the backside case 103 is separated from the rear case 102, the electronic parts mounted on the rear case 102 are exposed to the outside.

As shown, when the rear cover 103 is coupled to the rear case 102, a side portion of the rear case 102 can be exposed. In some cases, the rear case 102 may be completely covered by the rear case 103 during the engagement. Meanwhile, the rear case 103 may be provided with an opening for exposing the camera 121b and the sound output unit 152b to the outside.

These cases 101, 102, and 103 may be formed by injection molding of synthetic resin or may be formed of metal such as stainless steel (STS), aluminum (Al), titanium (Ti), or the like.

The mobile terminal 100 may be configured such that one case provides 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, a universal mobile terminal 100 in which a synthetic resin or metal is connected from the side to the rear side can be realized.

Meanwhile, the mobile terminal 100 may include a waterproof unit (not shown) for preventing water from penetrating 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 portion 103, And a waterproof member for sealing the inner space.

The mobile terminal 100 is provided with a display unit 151, first and second sound output units 152a and 152b, a proximity sensor 141, an illuminance sensor 142, a light output unit 154, Cameras 121a and 121b, first and second operation units 123a and 123b, a microphone 122, an interface unit 160, and the like.

2 and 3, a display unit 151, a first sound output unit 152a, a proximity sensor 141, an illuminance sensor 142, an optical output unit (not shown) A second operation unit 123b, a microphone 122 and an interface unit 160 are disposed on a side surface of the terminal body, And a mobile terminal 100 having a second sound output unit 152b and a second camera 121b disposed on a rear surface thereof.

However, these configurations are not limited to this arrangement. These configurations may be excluded or replaced as needed, or placed on different planes. For example, the first operation 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 surface of the terminal body rather than 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 by the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information .

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

In addition, the display unit 151 may exist in two or more depending on the embodiment of the mobile terminal 100. In this case, the mobile terminal 100 may be provided with a plurality of display portions spaced apart from each other or disposed integrally with one another, or may be disposed on different surfaces, respectively.

The display unit 151 may include a touch sensor that senses a touch with respect to the display unit 151 so that a control command can be received by a touch method. When a touch is made to the display unit 151, the touch sensor senses the touch, and the control unit 180 generates a control command corresponding to the touch based on the touch. The content input by the touch method may be a letter or a number, an instruction in various modes, a menu item which can be designated, and the like.

The touch sensor may be a film having a touch pattern and disposed between the window 151a and a display (not shown) on the rear surface of the window 151a, or may be a metal wire . Alternatively, the touch sensor may be formed integrally with the display. For example, the touch sensor may be disposed on a substrate of the display or inside the display.

In this way, the display unit 151 can form a touch screen together with the touch sensor. In this case, the touch screen can function as the user input unit 123 (see FIG. 1). In some cases, the touch screen may replace at least some functions of the first operation unit 123a.

The first sound output unit 152a may be implemented as a receiver for transmitting a call sound to a user's ear and the second sound output unit 152b may be implemented as a loud speaker for outputting various alarm sounds or multimedia playback sounds. ). ≪ / RTI >

The window 151a of the display unit 151 may be provided with an acoustic hole for emitting the sound generated from the first acoustic output unit 152a. However, the present invention is not limited to this, and the sound may be configured to be emitted along an assembly gap (for example, a gap between the window 151a and the front case 101) between the structures. In this case, the appearance of the mobile terminal 100 can be made more simple because the hole formed independently for the apparent acoustic output is hidden or hidden.

The optical output unit 154 is configured to output light for notifying the occurrence of an event. Examples of the event include a message reception, a call signal reception, a missed call, an alarm, a schedule notification, an email reception, and reception of information through an application. The control unit 180 may control the light output unit 154 to terminate the light output when the event confirmation of the user is detected.

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

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

In this figure, the first operation unit 123a is a touch key, but the present invention is not limited thereto. For example, the first operation unit 123a may be a mechanical key, or a combination of a touch key and a touch key.

The contents input by the first and second operation units 123a and 123b can be variously set. For example, the first operation unit 123a receives a command such as a menu, a home key, a cancellation, a search, and the like, and the second operation unit 123b receives a command from the first or second sound output unit 152a or 152b The size of the sound, and the change of the display unit 151 to the touch recognition mode.

On the other hand, a rear input unit (not shown) may be provided on the rear surface of the terminal body as another example of the user input unit 123. The rear input unit is operated to receive a command for controlling the operation of the mobile terminal 100, and input contents may be variously set. For example, commands such as power on / off, start, end, scrolling, and the like, the size adjustment of the sound output from the first and second sound output units 152a and 152b, And the like can be inputted. The rear input unit may be implemented as a touch input, a push input, or a combination thereof.

The rear input unit may be disposed so as to overlap with 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 such that when the user holds the terminal body with one hand, the rear input unit can be easily manipulated using the index finger. However, the present invention is not limited thereto, and the position of the rear input unit may be changed.

When a rear input unit is provided on the rear surface of the terminal body, a new type of user interface using the rear input unit can be realized. When the first operation unit 123a is not disposed on the front surface of the terminal body in place of at least a part of the functions of the first operation unit 123a provided on the front surface of the terminal body, The display unit 151 may be configured as a larger screen.

Meanwhile, the mobile terminal 100 may be provided with a fingerprint recognition sensor for recognizing the fingerprint of the user, and the controller 180 may use the fingerprint information sensed through the fingerprint recognition sensor as 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 the user's voice, other sounds, and the like. The microphone 122 may be provided at a plurality of locations to receive stereophonic sound.

The interface unit 160 is a path through which the mobile terminal 100 can be connected to an external device. For example, the interface unit 160 may include a connection terminal for connection with another device (for example, an earphone or an external speaker), a port for short-range communication (for example, an infrared port (IrDA Port), a 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 as a socket for receiving an external card such as a SIM (Subscriber Identification Module) or a UIM (User Identity Module) or a memory card for storing information.

And a second camera 121b may be disposed on a rear surface of the terminal body. In this case, the second camera 121b has a photographing direction which is 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 form. Such a camera can be named an 'array camera'. When the second camera 121b is configured as an array camera, images can be taken in various ways using a plurality of lenses, and a better quality image can be obtained.

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

And a second sound output unit 152b may be additionally disposed in 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 for implementing a speakerphone mode in a call.

The terminal body may be provided with at least one antenna for wireless communication. The antenna may be embedded in the terminal body or formed in the case. For example, an antenna constituting a part of the broadcast receiving module 111 (see FIG. 1) can be configured to be able to be drawn out from the terminal body. Alternatively, the antenna may be formed in a film type and attached to the inner surface of the rear portion 103, or a case including a conductive material may be configured to function as an antenna.

The terminal body is provided with a power supply unit 190 (see FIG. 1) for supplying power to the mobile terminal 100. The power supply unit 190 may include a battery 191 built in the terminal body or detachable 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 be wirelessly chargeable through a wireless charger. The wireless charging may be implemented by a magnetic induction method or a resonance method (magnetic resonance method).

In the figure, an example is shown in which the rear portion 103 is connected to the rear case 102 so as to cover the battery 191, thereby limiting the detachment of the battery 191 and protecting the battery 191 from external impacts and foreign substances . When the battery 191 is detachably attached to the terminal body, the rear portion 103 may be detachably coupled to the rear case 102. [

The mobile terminal 100 may be provided with an accessory that protects the appearance or supports or expands the function of the mobile terminal 100. [ One example of such an accessory is a cover or pouch that covers or accommodates at least one side of the mobile terminal 100. [ The cover or pouch may be configured to interlock with the display unit 151 to expand the function of the mobile terminal 100. Another example of an accessory is a touch pen for supplementing or extending a touch input to the touch screen.

1, a mobile terminal according to the present invention may include a Bluetooth ™, a Radio Frequency Identification (RFID), an Infrared Data Association (IrDA), a UWB (Ultra Wideband), a ZigBee, an NFC Field Communication), and Wireless USB (Wireless Universal Serial Bus).

Meanwhile, as described above, in the present invention, the rear case 103 may be made of a metal material in view of prevention of appearance damage due to use and design. At this time, the antenna that is electrically connected to the wireless communication unit 110 and transmits or receives electromagnetic waves through a free space or a free space must be formed of a non-metallic material in the peripheral region. Therefore, there arises a problem that it is difficult to manufacture the rear case integrally formed of such a metal material.

In addition, in addition to such a problem, there is a problem that time and cost are increased when the rear case 103 is manufactured by NC (Numeric Control) processing. On the other hand, when the rear case 103 is manufactured by die-casting, there is a problem in that it is not only troublesome to manufacture a mold, but also has a low degree of design completion. Accordingly, the present invention proposes a mechanism for solving such a problem.

Hereinafter, the mobile terminal 100 including the antenna and the rear case will be described in detail with reference to FIGS. 4 and 5. FIG.

The mobile terminal according to the present invention includes an antenna area in which at least a part of the rear case is removed of metal to receive the antenna.

FIG. 4 illustrates a process of processing an inner case and a rear case of a mobile terminal according to the present invention.

FIG. 5 illustrates a process of assembling an inner case and a rear case to a mobile terminal according to the present invention.

Referring to FIGS. 4 and 5, the mobile terminal 400 includes a rear case 410 and an inner case 450.

The rear case 410 includes a rear portion 420 and a side portion 430 of a first metal material. In addition, the rear portion 420 includes an antenna region 421 in which the metal is removed to receive the antenna. In addition, the rear portion 420 may further include an opening 422 for exposing the built-in electronic component to the outside.

The inner case 450 is formed of a second metal material, which is different from the first metal material, and is mounted inside the rear case 410.

According to an embodiment of the present invention, the first metal material may be at least one of aluminum (Al), steel use stainless steel (SUS), and titanium (Ti), and the second metal material may be magnesium (Mg).

The aluminum member has an advantage that an oxide film can be formed by anodizing, and corrosion due to use can be prevented. The SUS member corresponds to a metal member made of iron in order to enhance corrosion resistance. SUS has a beautiful surface and excellent corrosion resistance, so it can be used for various applications by not using surface treatment such as painting or painting but utilizing its original surface. The titanium member has a disadvantage of excellent corrosion resistance but low strength. However, the titanium member can improve the strength by alloying.

Further, since the magnesium member can be used for applications requiring high strength and light weight, it can be adopted as an inner case. Further, the magnesium member is suitable for die casting.

Meanwhile, the rear case 410 and the inner case 450 may be assembled in a sliding manner as shown in FIG. 5 in order to create a uni-body structure.

Meanwhile, the rear case 410 is manufactured by press working, and the inner case 450 can be manufactured by di-casting.

The antenna region 421 corresponds to a region of the rear portion 420 where the antenna is received. Meanwhile, the antenna region 420 may be a non-metallic member. Here, the non-metallic member is a plastic member, and the plastic member can be synthesized to have a low dielectric constant to prevent deterioration of characteristics of the antenna.

4 and 5, the case is manufactured and assembled as follows. First, as shown in the first step of FIG. 4, the rear case 410 and the inner case 450 are manufactured by press working and die casting, respectively.

Next, as shown in FIG. 5, the inner case 450 is inserted into the rear case 410 to be assembled into an integrated case. 5, the process of inserting the inner case 450 into the rear case 410 corresponds to the front and rear views, respectively. At this time, as shown in the second step of FIG. 4, the inner case 450 is inserted into the rear case 410 and assembled.

Next, as shown in the third step of FIG. 4, the rear case 410 may be connected to the inner case 450 and then connected. For example, the die-casting connection part corresponding to the additional area of the inner case 450 for joining the rear case 410 and the inner case 450 may be removed.

Meanwhile, FIG. 6 illustrates a method of joining an inner case and a rear case according to an embodiment of the present invention.

Referring to FIG. 6A, the rear case 410 and the inner case 450 may be joined by a conductive bonding liquid 460. The rear case 410 manufactured by press working and the inner case 450 manufactured by die casting should be bonded by the conductive bonding liquid 460 for improving antenna performance. That is, if the rear case 410 and the inner case 450 are incompletely coupled, the performance of the antenna is affected by the separation of the metal corresponding to the ground plane. Therefore, the rear case 410 and the inner case 450 should be adhered by the conductive bonding liquid 460. The conductive bonding liquid 460 may be adhered to the inner case 450 at the rear portion 420 and the side portion 430 of the rear case 410 as shown in FIG.

6B, when the inner case 450 is coupled with the rear case 410 by the conductive bonding liquid 460, in order to prevent overflow of the conductive bonding liquid 460, And a separation unit 470. For example, the separator 470 may be in the form of a projection. The separator 470 may be used for aligning the rear case 410 and the inner case 450 when the rear case 410 and the inner case 450 are coupled.

FIG. 7 is a conceptual diagram showing a slitting process according to an embodiment of the present invention. The slitting process includes a metal removing process before mounting the inner case and a post-process after mounting the inner case. Here, the respective processes are not limited to the order described, but can be freely changed and changed according to convenience in the manufacturing process.

The metal removal process includes an antenna region generation process S710 and a hole generation process S720. In addition, the post-processing includes a press upper surface / die casting part processing step S730, a die casting joint part processing step S740, and an injection molding processing step S750.

The antenna region generating process S710 is a process of processing the slit corresponding to the antenna region in the rear portion 420. [ That is, the antenna region generation process S710 may cut a part of the rear portion 420 to form a slit in the antenna region 421, for example.

The hole generating process (S720) is a process for machining the holes required for the side portion 430. [ That is, the hole generation process (S720) may generate a connector hole for the external interface on the side portion 420 of the mobile terminal.

The press upper surface / die casting portion processing step S730 processes the side portions 430 of the rear case 420 press-molded after the rear case 410 is coupled with the inner case 450. [ Further, the exposed surface of the inner case 450 coupled by die casting is processed.

The die-casting connection processing step S740 is a process of machining a connection part connected to the rear case 410 after being coupled with the inner case 450. [ For example, the die-casting connection part corresponding to the additional area of the inner case 450 for joining the rear case 410 and the inner case 450 may be removed.

The injection molding process S750 processes the lower end of the antenna region 421 or the rear portion 420 and forms a non-metal region in the antenna region 421 or the lower end portion by a method such as injection molding.

Meanwhile, FIG. 8 illustrates a case manufacturing method of a mobile terminal according to an embodiment of the present invention. 9 illustrates a method of manufacturing a case of a mobile terminal according to another embodiment of the present invention.

In this regard, it goes without saying that the matters described in FIGS. 1 to 7 can be used in combination with the matters described in the case manufacturing method of a mobile terminal according to the present invention.

Referring to FIG. 8, the case manufacturing method includes a back case manufacturing process S810, a metal removing process S820, an inner case mounting process S830, and a non-metal area creating process S840.

The rear case manufacturing process (S810) produces a rear case including a rear portion and a side portion of the first metal material.

The metal removing process S820 removes metal from the antenna region corresponding to the area of the antenna of the rear case.

The inner case attaching step (S830) attaches an inner case of a second metal material, which is made of a metal material different from the first metal material, to the rear case. Meanwhile, in the inner case mounting step (S830), the rear case and the inner case are bonded by a conductive bonding liquid.

Here, the rear case manufacturing process (S810) may be manufactured by press working, and the inner case may be manufactured by die casting.

The first metal material is at least one of aluminum (Al), stainless steel (SUS), and titanium (Ti), and the second metal material is at least one of magnesium ).

The non-metal region generation process S840 generates a non-metal region by emitting the antenna region of the rear case through a non-metallic member. Meanwhile, in the non-metal region generating step (S840), metal may be removed from the lower end of the rear case, and the metal may be injected into a non-metallic member.

9, the case manufacturing method includes a back case manufacturing process S810, a metal removing process S920, an inner case mounting process S830, a non-metal region creating process S840, and a rear case combining process S950 ).

The rear case manufacturing process S810, the inner case mounting process S830, and the non-metal region creating process S840 are explained with reference to FIG.

The metal removing process S920 includes an antenna region generating process S921 for removing metal from the antenna region corresponding to a region where the antenna is received on the rear surface portion and an opening region for forming an opening portion for exposing the electronic component embedded in the rear portion, (S921).

The rear case coupling process (S950) is a process of detachably coupling the rear case to the rear case.

According to at least one of the embodiments of the mobile terminal according to the present invention having the metal case and the antenna, it is difficult for the back case, which is made of a metal material, to be manufactured integrally with a non- It is possible to solve the problem.

In addition, according to at least one embodiment of the present invention, it is possible to solve the increase in the time and cost of the case manufacturing and the hassle of the mold making in the terminal equipped with the metal case.

The above-described manufacturing method of the present invention can be implemented as a computer-readable code on a medium on which a program is recorded. The computer readable medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of the computer readable medium include a hard disk drive (HDD), a solid state disk (SSD), a silicon disk drive (SDD), a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, , And may also be implemented in the form of a carrier wave (e.g., transmission over the Internet). Also, the computer may include a control unit 180 of the terminal. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

100: mobile terminal 410: rear case
421: antenna area 450: inner case

Claims (14)

1. A mobile terminal comprising a case which forms an appearance of a terminal body,
In this case,
A rear portion and a side portion of the first metal material,
The back side includes a backside case including an antenna area where the metal is removed to receive the antenna; And
And an inner case of a second metal material different from the first metal material mounted inside the rear case,
Wherein the antenna region is a non-metallic member. The method according to claim 1,
The rear case is manufactured by press working,
Wherein the inner case is manufactured by die casting. The method according to claim 1,
Wherein the rear case further comprises an opening for exposing the built-in electronic component to the outside. The method according to claim 1,
Wherein the rear case and the inner case are joined by a conductive bonding liquid. The method according to claim 1,
Wherein the first metal material is at least one of aluminum (Al), stainless steel (SUS), and titanium (Ti), and the second metal material is magnesium (Mg). The method according to claim 1,
And metal is removed from the lower end portion of the rear case to be ejected as a non-metallic member. The method according to claim 1,
In this case,
And the rear case is detachably coupled to the rear case. 1. A case manufacturing method of a mobile terminal,
A rear case manufacturing process for manufacturing a rear case including a rear portion and a side portion of the first metal material;
A metal removing step of removing metal from an antenna area corresponding to an area where the antenna of the rear case is received;
An inner case mounting step of mounting an inner case of a second metal material, which is a metal material different from the first metal material, to the rear case; And
And generating a non-metal region by injecting the antenna region of the rear case into a non-metal member. 9. The method of claim 8,
The rear case manufacturing process is manufactured by press working,
Wherein the inner case is manufactured by die casting. 9. The method of claim 8,
The metal removal process may include:
Wherein the rear case further comprises an opening forming step of forming an opening for exposing the built-in electronic component to the outside. 9. The method of claim 8,
The inner case mounting process includes:
Wherein the back case and the inner case are joined together by a conductive bonding liquid. 9. The method of claim 8,
Wherein the first metal material is at least one of aluminum (Al), stainless steel (SUS) and titanium (Ti), and the second metal material is magnesium (Mg). 9. The method of claim 8,
The non-metal region generating process includes:
Further comprising the step of removing the metal from the lower end of the rear case and injecting the metal into the non-metallic member. 9. The method of claim 8,
And the rear case is detachably coupled to the rear case.

Images