KR20100036881A - Portable terminal - Google Patents

Abstract

PURPOSE: A portable terminal is provided to improve the properties for an SAR(Specific Absorption Ratio) remarkably by relatively reducing the radiation of an electromagnetic wave through a metallic support plate and a metallic bracket. CONSTITUTION: At the front side of a terminal case(102), a window(201) for the protection of a display is installed. A keypad installation hole is formed at one side of the window. A keypad(220) is installed at a keypad installation hole, and includes a metallic support plate(223). In order to fix the display, a metallic bracket(250) is formed in frame shape. The bracket is attached to the inside of the window, and is electrically connected to the ground of a circuit board(210).

Description

Mobile terminal {PORTABLE TERMINAL}

The present invention relates to a mobile terminal capable of reducing electromagnetic wave specific absorption rate (SAR).

A portable terminal is a portable device that is portable and has one or more functions such as voice and video calling, information input and output, and data storage.

As the functions are diversified, the mobile terminal has complicated functions such as taking a picture or a video, playing a music or a video file, playing a game, receiving a broadcast, and the like. It also implements.

Many new attempts are being applied to these multimedia devices in terms of hardware or software to implement complex functions. For example, a user interface environment is provided for a user to search for or select a function easily and conveniently.

The portable terminal includes radio frequency (RF) components in order to receive, transmit and process a radio signal. However, since electromagnetic waves generated by RF components may be harmful to the human body, a method for reducing them has been developed. Therefore, in order to quantify the effect that electromagnetic waves can have on the human body, it is recommended to introduce a specific absorption ratio (SAR) and to produce and use only portable terminals below a reference value.

The SAR reduction method according to the related art lowers the SAR by simply lowering the antenna gain, so there is a problem in that antenna performance is degraded.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and provides a portable terminal capable of reducing an electromagnetic wave specific absorption rate (SAR) without causing a decrease in antenna performance.

Portable terminal according to an embodiment of the present invention for realizing the above problems, the terminal is provided with a window on the front surface to protect the display, the keypad case is formed on one side of the window; A keypad mounted in the keypad installation hole and including a metallic support plate; And a metallic bracket formed in a frame shape to fix the display and attached to the inside of the window and connected to the ground of the circuit board.

As an example related to the present invention, the support plate and the bracket of the keypad may be arranged to be spaced apart from each other so that RF decoupling may be performed.

As an example related to the present invention, an upper end of the support plate of the keypad and a lower end of the bracket may be provided with extension portions having through holes formed therein to fix the support plate and the bracket to the terminal case.

As an example related to the present invention, the extension portion of the support plate and the extension portion of the bracket may be formed in plural and staggered so as not to be in contact with each other.

As an example related to the present invention, the support plate and the bracket may be electrically connected by a conductive connection tape.

As an example related to the present invention, the connection tape may be arranged to be electrically connected when the support plate and the bracket are mounted on the connection tape and fixed on the inner side of the case.

As an example related to the present invention, an extension protrusion for pressing may be further formed on the upper end of the support plate to pressurize the connection tape.

As an example related to the present invention, the connection tape may be attached to at least one of the support plate and the bracket.

As an example related to the present invention, the upper end of the support plate and the lower part of the bracket may be attached by an insulating tape.

According to the mobile terminal according to the present invention configured as described above, the current flowing through the antenna because it is a method of relatively reducing the radiation of electromagnetic waves directed to the front of the mobile terminal through the metallic bracket for fixing the display and the metallic support plate for supporting the keypad. It is possible to remarkably improve the characteristics related to the specific absorption rate of electromagnetic waves without intentionally lowering them.

According to an example related to the present invention, the metallic bracket and the support plate may induce decoupling of a high frequency signal to a hot spot having a high specific electromagnetic wave absorption rate through a suitable distance from each other.

Hereinafter, a portable terminal related to the present invention will be described in detail with reference to the accompanying drawings. The suffixes "module" and "unit" for components used in the following description are merely given in consideration of ease of preparation of the present specification, and do not impart any particular meaning or role by themselves. Therefore, it should be noted that "module" and "unit" may be used interchangeably.

The portable terminal can be implemented in various forms. For example, a terminal described herein includes a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation device, and the like. And fixed terminals such as digital TVs, desktop computers, and the like. In the following description, it is assumed that the terminal is a portable terminal. However, it will be readily apparent to those skilled in the art that the configuration according to the following description may also be applied to fixed terminals, except for components specifically configured for mobile use.

1 is a block diagram of a portable terminal related to the present invention.

The mobile terminal 100 may include a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory unit 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. 1 illustrates a mobile terminal having various components. However, not all illustrated components are required. The mobile terminal may be implemented by more components than the illustrated components, or the mobile terminal may be implemented by fewer components.

The following describes the components in order.

The wireless communication unit 110 may include one or more components for wireless communication between the mobile terminal 100 and another wireless communication system or wireless communication between the mobile terminal 100 and a network in which the mobile terminal 100 is located. . For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless internet module 113, a short range communication module 114, a location information module 115, and the like. .

The broadcast receiving module 111 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. The broadcast management server may mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a pre-generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

Meanwhile, broadcast related information may be provided through a mobile communication network, and in this case, may be received by the mobile communication module 112.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcast signals using various broadcast systems, and in particular, digital multimedia broadcasting-terrestrial (DMB-T), digital multimedia broadcasting-satellite (DMB-S), and media forward link only (MediaFLO). ), Digital broadcast signals may be received using digital broadcasting systems such as DVB-H (Digital Video Broadcast-Handheld) and ISDB-T (Integrated Services Digital Broadcast-Terrestrial). Of course, the broadcast receiving module 111 is configured to be suitable for all broadcast systems providing broadcast signals as well as the digital broadcast system described above.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory unit 160.

In addition, the mobile communication module 112 transmits and receives a radio signal with at least one of a base station, an external terminal, and a server on a mobile communication network. Here, 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 is a module for wireless Internet access, and the wireless Internet module 113 can be built in or externally. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

In addition, the location information module 115 is a module for checking or obtaining the location of the mobile terminal. A representative example of the location information module is a GPS (Global Position System) module. According to the current technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites, and then applies triangulation to the calculated information, so that three-dimensional current position information according to latitude, longitude, and altitude is obtained. Can be calculated accurately. Currently, a method of calculating position and time information using three satellites and correcting an error of position and time information calculated using another satellite is widely used. In addition, the GPS module 115 may calculate speed information by continuously calculating the current position in real time.

Meanwhile, the A / V input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes an image frame such as a still image or a moving image obtained by the image sensor in the video communication mode or the photographing mode. The processed image frame may be displayed on the display unit 151.

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. The camera 121 may be equipped with two or more cameras according to the configuration of the terminal.

The microphone 122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 112 and output in the call mode. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for the user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like. In particular, when the touch pad has a mutual layer structure with the display unit 151 described later, this may be referred to as a touch screen.

The sensing unit 140 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a position of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate a sensing signal for controlling the operation of the portable terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, it is responsible for sensing functions related to whether the power supply unit 190 is supplied with power or whether the interface unit 170 is coupled to an external device. The sensing unit 140 may include a proximity sensor 141. This will be described later with reference to the touch screen.

The interface unit 170 serves as an interface with all external devices connected to the mobile terminal 100. For example, wired / wireless headset ports, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, Video I / O (Input / Output) port, earphone port, etc. may be included. Here, the identification module is a chip that stores various types of information for authenticating the usage right of the mobile terminal 100, and includes a user identification module (UIM) and a subscriber identify module (SIM). ), A Universal Subscriber Identity Module (“USIM”), and the like. In addition, the device equipped with the identification module (hereinafter, 'identification device') may be manufactured in the form of a smart card. Therefore, the identification device may be connected to the terminal 100 through a port. The interface unit 170 receives data from an external device or receives power and transmits the data to each component inside the mobile terminal 100 or transmits the data inside the mobile terminal 100 to an external device.

In addition, the interface unit 170 is a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals input from the cradle by a user. It may be a passage that is delivered to the mobile terminal. Various command signals or power input from the cradle may be operated as signals for recognizing that the mobile terminal is correctly mounted on the cradle.

The output unit 150 is for outputting an audio signal, a video signal, or an alarm signal. The output unit 150 may include a display unit 151, an audio output module 152, and an alarm output module 153. have.

The display unit 151 displays and outputs information processed by the mobile terminal 100. For example, when the mobile terminal is in a call mode, a user interface (UI) or a graphic user interface (GUI) associated with a call is displayed, and the mobile terminal 100 displays a video call mode or a photographing mode. If is displayed, and / or the received image or UI, GUI.

Meanwhile, as described above, when the display unit 151 and the touch pad form a mutual layer structure to form a touch screen, the display module 151 may be used as an input device in addition to the output device. The display unit 151 may be a liquid crystal display, a thin film transistor-liquid crystal display, an organic light-emitting diode, a flexible display, a three-dimensional display 3D display). Some of these displays can be configured to be transparent so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display includes a transparent LCD. In addition, two or more display units 151 may exist according to the implementation form of the mobile terminal 100. The touch screen may be configured to detect a touch input pressure as well as a touch input position and area.

Meanwhile, the proximity sensor 141 may be disposed inside or near the touch screen. The proximity sensor 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. Thus, proximity sensors have a considerably longer life than contact sensors and their utilization is also quite high. Examples of the proximity sensor 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 high frequency oscillation type proximity sensor, when the sensing object approaches the sensor sensing surface in the state of oscillating high frequency wave of oscillation circuit, the oscillation amplitude of the oscillation circuit is reduced or stopped, and this change is converted into an electrical signal. The presence or absence of a will be detected. Therefore, even if a non-metallic material comes between the high frequency oscillation proximity sensor and the sensing object, the proximity switch can detect the sensing object to be detected without interference of the object.

Even if the proximity sensor is not mounted, the touch screen may be configured to detect proximity of the pointer by a change in electric field according to proximity of the pointer when the touch screen is capacitive.

Therefore, when the pointer is not in contact but is in close proximity on the touch screen, the position of the pointer and the distance between the pointer and the touch screen may be detected. Hereinafter, for convenience of explanation, the act of allowing the pointer to be located close to the touch screen to recognize that the pointer is located on the touch screen is referred to as a "proximity touch", and the act of actually touching the pointer on the touch screen. Will be referred to as "contact touch". In addition, the position of the proximity touch with the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in close proximity touch.

The proximity sensor detects proximity touch and proximity touch patterns (eg, proximity touch distance, proximity touch direction, proximity touch speed, proximity touch time, proximity touch position, proximity touch movement state, etc.) Information corresponding to the touch operation and the proximity touch pattern may be output on the touch screen.

The sound output module 152 outputs audio data received from the wireless communication unit 110 or stored in the memory unit 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. In addition, the sound output module 152 outputs a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the portable terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than an audio signal or a video signal. For example, the signal may be output in the form of vibration. When a call signal is received or a message is received, the alarm unit 153 may output a vibration to inform this. Alternatively, when a key signal is input, the alarm unit 153 may output a vibration in response to the key signal input. Through the vibration output as described above, the user can recognize the occurrence of the event. Of course, the signal for event occurrence notification may be output through the display unit 151 or the voice output module 152.

The memory unit 160 may store a program for processing and controlling the controller 180 and may temporarily store input / output data (for example, a phone book, a message, a still image, a video, etc.). You can also do In addition, the memory unit 160 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

The memory unit 160 may include a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), Random Access Memory (RAM) Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM) magnetic memory, Magnetic disk It may include at least one type of storage medium of the optical disk. In addition, the mobile terminal 100 may operate a web storage that performs a storage function of the memory unit 160 on the Internet.

The controller 180 typically controls the overall operation of the mobile terminal. For example, perform related control and processing for voice calls, data communications, video calls, and the like. In addition, the control unit 180 may include a multimedia module 181 for multimedia playback. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The controller 180 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on a touch screen as text and an image, respectively.

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.

Various embodiments described herein may be implemented in a recording medium readable by a computer or similar device using, for example, software, hardware or a combination thereof. According to a hardware implementation, the embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing the functions. It may be implemented by the controller 180. According to the software implementation, embodiments such as a procedure or a function may be implemented with a separate software module to perform at least one function or operation. May be implemented by a software application written in a programming language. It is stored in the memory 160, and executed by a controller 180.

Hereinafter, the structure or the appearance of the portable terminal according to the present invention will be described in detail with reference to FIGS. 2 to 7.

2 is a front perspective view of a mobile terminal according to the present invention; Referring to FIG. 2, the portable terminal 100 includes a terminal body 101 of a 'bar' type. However, the present invention is not limited to the bar type portable terminal disclosed in FIG. 2, but is a 'folder' type in which two terminal bodies are foldably connected, but a 'slide' is slidably connected. The present invention can also be applied to a portable terminal having a different type or form factor such as a type.

The case (casing, housing, cover, etc.) forming the exterior of the terminal body 101 is formed by the front case 102 and the rear case 103. Various electronic components are embedded in the space formed by the front case 102 and the rear case 103. At least one intermediate case 104 may be further disposed between the front case 102 and the rear case 103. The cases 102, 103, and 104 may be formed by injecting synthetic resin, or may be formed of a metal material, for example, a material such as stainless steel (STS) or titanium (Ti), or a ceramic.

The first manipulation unit 131, the display unit 151, the first sound output unit 152, the first image input unit 121, the sound input unit 122, and the like may be disposed on the front surface of the terminal body 101.

The first manipulation unit 131 receives a command for controlling the operation of the portable terminal according to the present invention.

The display unit 151 includes a liquid crystal display (LCD) module, an organic light emitting diodes (OLED) module, an e-paper, a transparent OLED (TOLED), and the like, which visually express information. In addition, the display unit 151 includes a touch sensing means to receive information or a control command by a user's touch. The touch sensing stage may include a transparent electrode film disposed inside the window, and a resistive film type or an electrostatic type may be applied.

The first sound output unit 152 may be implemented in the form of a receiver or a loud speaker.

The first image input unit 121 may be implemented in the form of a camera module for capturing an image or a video of a user.

The sound input unit 122 may be implemented in the form of a microphone, for example, to receive a user's voice, other sounds, and the like. The sound input unit 122 may be disposed on the side of the terminal body 101.

As shown in FIG. 2, a second operation unit 132, an interface unit 170, a broadcast signal receiving antenna 116, and the like may be disposed on the side of the portable terminal 100.

The second manipulator 132 may be installed on the side of the terminal body 101. The second manipulator 132 together with the first manipulator 131 may be collectively referred to as a manipulating portion, and may be employed in any manner as long as the user is tactile in a tactile manner. For example, the operation unit may be implemented as a dome switch or a touch screen that can receive a command or information by a user's push or touch operation, a touch pad, a wheel that rotates keys, a jog method, or a method such as a joystick. It can also be implemented as.

In the functional aspect, the first operation unit 131 is for inputting information such as numbers or letters, symbols, or menus such as start and end, etc., and the second operation unit 132 provides a first image in addition to the scroll function. It may operate as a hot-key that performs a special function such as activation of the input unit 121.

The interface unit 170 serves as a path for allowing the portable terminal 100 to exchange data with an external device. For example, the interface unit 170 is wired or wirelessly, a connection terminal for connecting to the earphone, a port for short-range communication (for example, an infrared port (IrDA port), Bluetooth port (Bluetooth port), wireless LAN port ( wireless LAN port), or at least one of power supply terminals for supplying power to the mobile terminal. The interface unit 170 may be a card socket that accommodates an external card such as a subscriber identification module (SIM) or a user identity module (UIM) and a memory card for storing information.

On one side of the terminal body 101, an antenna 116 for receiving a broadcast signal may be disposed in addition to an antenna for a call. The antenna 116 may be rotatably installed after being drawn out or drawn out to the rear case 103.

3 is a rear perspective view of the portable terminal of FIG. 2.

Referring to FIG. 3, a power supply unit 190, a second sound output unit 154, and a second image input unit 125 may be further disposed on the rear surface of the terminal body 101.

The power supply unit 190 is mounted to the rear case 103 for supplying power to the portable terminal. The power supply unit 190 may be detachably coupled for charging, for example, as a battery that can be charged from a power supply in a wired or wireless manner. The power supply unit 190 may be disposed to be invisible from the outside by the cover.

The second sound output unit 154 may implement a stereo function together with the first sound output unit 152 (see FIG. 2), and may be used for a call in the speakerphone mode.

The second image input unit 125 may be a camera having a photographing direction substantially opposite to that of the first image input unit 121 (see FIG. 2) and having different pixels from the first image input unit 121. For example, the first video input unit 121 has a low pixel so that it is easy to photograph a user's face and transmit it to a counterpart in a video call, and the second video input unit 125 immediately photographs a general subject. It is preferable to have a high pixel because it is not transmitted in many cases.

The flash 127 and the mirror unit 126 are further disposed adjacent to the second image input unit 125. The flash 127 shines light toward the subject when the subject is photographed by the second image input unit 125. The mirror unit 126 allows the user to see the user's face or the like when the user wants to photograph himself (self-photographing) using the second image input unit 125.

In the above description, the first operation unit 131 and the like have been described as being mounted to the front case 102, and the second operation unit 132 and the like are mounted to the rear case 103, but are not necessarily limited thereto. For example, the second manipulator 132 may be disposed in the front case 102 adjacent to the first manipulator 131. In addition, even if the second image input unit 125 is not separately provided, the first image input unit 121 may be rotatably formed so that the image capturing direction of the second image input unit 125 may be taken.

4 is an exploded perspective view of the portable terminal of FIG. 2. Referring to FIG. 4, various components are mounted in the front cable, including the display 151 and the circuit board 210.

A window 201 having a light transmissive area is formed on the front surface of the front case 102 to protect the display 151. The keypad mounting hole 102a is formed at one side of the window 201 so that the keypad 220 can be installed.

The keypad 220 includes a plurality of key tops 221, a metallic support plate 223, a connection pad 225, and the like. The key top 221 may be engraved with numbers, letters, or symbols by printing, etching, or drilling. The key top 221 is integrally connected to the connection pad 225 by a method such as mold or injection.

The connection pad 225 may be formed to be translucent or translucent so that light generated from the light source may illuminate the key top 221. On the inner side surface of the connection pad 225, a push protrusion 226 is formed to easily press and operate the dome switch 211 of the circuit board 210.

The support plate 223 may be formed of a metal such as stainless steel (STS) so as to retain the rigidity of the keypad 220 while being sufficiently resistant to repeated deformation.

The connection pad 225 and the key top 221 may be manufactured to be integrally connected by a method such as double injection. To this end, the support plate 223 is formed with a through hole 223a so that the connection pad 225 and the key top 221 can be connected to each other.

The keypad 220 is installed to be exposed through the installation hole 102a of the front case 102. The edge of the keypad 220 forms a locking step so that the keypad 220 is caught in the installation hole 102a.

Extension portions 227 are formed at upper ends of the support plate 223 and the connection pad 225 to fix the keypad 220 to the front case 102. A through hole 227a is formed in the extension part 227, and the through hole 227a is caught and fixed to the fixing protrusion 205 formed on the inner surface of the front case 102.

Referring to FIG. 4, one end of the support plate 223 is connected to the circuit board 210 when the front case 102 is assembled so that the support plate 223 is connected to the ground of the circuit board 210. Ground cushion 280 is disposed.

The bracket 250 is attached to the inner side of the window 201 to fix the display 151. To this end, the bracket 250 may include a side frame structure 251 for wrapping the side of the display 151, and the inside of the side frame structure 251 buffers the shock to be applied to the display 151 A member (see No. 256 of FIGS. 5 to 7) may be provided.

Extension parts 253 and 254 are formed around the bracket 250 to fix the bracket 250 to the inner surface of the window 201. Through holes 253a may be formed in the extension parts 253 and 254, and each of the through holes 253a is caught and fixed to the fixing protrusion 206 formed on the inner surface of the window 201.

A ground pad 216 is formed at an upper end of the circuit board 210 to connect the bracket 250 to the ground of the circuit board 210. Correspondingly, the upper end of the bracket 250 is provided with a first ground tape 261 that is pressed when the bracket 250 is fixed and maintains contact with the bracket 250. The first ground tape 261 may be used in the form of a thin metal yarn woven. An end portion of the first ground tape 261 may include a conductive elastic member 262 such that when the front case 102 is pressed, the ground pad 216 is elastically pressed to contact the front case 102.

The vibrator 213 grounded by the connection pad 225 and the conductive elastic member 262 may be disposed above the circuit board 210. The vibrator 213 transmits various state information of the terminal 100 to the user by vibration. In order to ground the vibrator 213, a second ground tape 265 may be attached to an upper end of the bracket 250. The second ground tape 265 may be attached on the cushion 266 to prevent the vibrator 213 from flowing. Accordingly, when the front case 102 is coupled to the intermediate case 104 and assembled, the second ground tape 265 presses the vibrator 213 to maintain a reliable ground state.

An antenna 270 for wireless communication of the mobile terminal 100 may be disposed at one corner of the terminal cases 102, 103, and 104. 4 shows that the circuit board 210 is disposed at the lower rear side. The feeder 271 of the antenna 270 is formed in a spring shape so as to be in contact with and connected to the circuit board 210.

FIG. 5 is a view illustrating a state in which the keypad and the bracket of FIG. 4 are coupled to the front case, which is a rear view of the front case, and FIG.

The bracket 250 coupled to the rear surface of the front case 102 and the support plate 223 of the keypad 220 have a predetermined distance (g) from each other. That is, the bracket 250 and the support plate 223 are arranged at a predetermined distance rather than being integrally connected or attached to each other so as to obtain a decoupling effect on high frequencies.

However, the extension part 253 formed at the lower end of the bracket 250 and the extension part formed at the upper end of the support plate 223 so that the bracket 250 and the support plate 223 may be fixed to the rear surface of the front case 102. 227 are mutually arrange | positioned, and space | interval and fixation are simultaneously performed. The through holes 253a and 227a formed in each of the extension parts 253 and 227 are locked to the fixing protrusions 206 and 205 formed on the rear surface of the front case 102, respectively.

Accordingly, the separation between the bracket 250 and the support plate 223 causes decoupling with respect to high frequency so that the direction of the main radiation proceeds in the opposite direction than the front case 102, that is, the human body. . Therefore, the room for absorbing electromagnetic waves is reduced by that much, and the effect of reducing the Specific Absorption Ratio (SAR) can be expected.

Referring to FIG. 5, a conductive connection tape 291 for electrically connecting the bracket 250 and the support plate 223 is disposed at one portion where the bracket 250 and the support plate 223 are adjacent to each other. When the connection tape 291 is first disposed on the inner surface of the front case 102 and then the support plate 223 and the bracket 250 are mounted and fixed, the support plate 223 and the bracket 250 are connected to the connection tape 291. Is electrically connected (see FIG. 6). To this end, an extension protrusion 224 for pressurizing the connection tape 291 may be formed at an upper end of the support plate 223.

The connection tape 291 may be used in the form of a thin metal yarn woven. Furthermore, the conductive connection tape 291 serves to prevent the gain of the low band from being reduced.

As illustrated in FIG. 6, an insulating tape 230 may be attached to the upper end of the support plate 223 and the lower part of the bracket 250. The insulating tape 230 prevents the EMI tape and the ground of the flexible circuit board 210 connected to the display 151 from being connected to the ground.

FIG. 7 is a rear view of the front case for showing the connection between the bracket and the keypad support plate as another example related to the present invention. According to FIG. 7, the bracket 250 and the support plate 223 are spaced apart from each other, but are electrically connected by the connection tapes 292 and 293 at a plurality of locations. On the other hand, unlike FIG. 6, the connection tapes 292 and 293 are attached to the bracket 250 as a plurality of connection tapes 292 and 293. The connection tapes 292 and 293 may be attached to at least one of the bracket 250 and the support plate 223. Here, the separation of the bracket 250 and the support plate 223 minimizes the emission of electromagnetic waves toward the human body without accompanying a decrease in gain of the antenna through high frequency decoupling. The connection tapes 292 and 293 may have a form in which thin metal yarns are woven.

The above-described portable terminal is not limited to the configuration and method of the embodiments described above, but may be configured by selectively combining all or some of the embodiments so that various modifications can be made.

1 is a block diagram of a portable terminal related to the present invention.

2 is a front perspective view of a mobile terminal related to the present invention;

3 is a rear perspective view of the mobile terminal of FIG.

4 is an exploded perspective view of the mobile terminal of FIG. 2;

5 is a view illustrating a state in which the keypad and the bracket of FIG. 4 are coupled to the front case, and a rear view of the front case;

6 is an enlarged view illustrating an enlarged portion of the bracket and the support plate adjacent to each other in FIG. 5;

Figure 7 is another example associated with the present invention, a rear view of the front case for showing the connection of the bracket and the keypad support plate

Claims (9)

A terminal case having a front surface to protect the display and having a keypad installation hole formed at one side of the window; A keypad mounted to the keypad mounting hole and including a metallic support plate; And And a metal bracket formed in a frame shape to fix the display and attached to the inside of the window and electrically connected to the ground of the circuit board. The method of claim 1, And a support plate and a bracket of the keypad are spaced apart from each other so that RF decoupling can be performed. The method of claim 1, The upper end of the support plate of the keypad and the lower end of the bracket is a portable terminal, characterized in that each provided with an extension portion formed with a through hole to fix the support plate and the bracket to the terminal case. The method of claim 3, The extension portion of the support plate and the extension portion of the bracket is formed in a plurality, characterized in that the mobile terminal is arranged alternately so as not to contact each other. The method of claim 1, The support plate and the bracket is a mobile terminal, characterized in that electrically connected by a conductive connection tape. The method of claim 5, The connection tape is a mobile terminal, characterized in that arranged in the state that is arranged on the inner surface of the case and the support plate and the bracket is electrically connected by mounting on the connection tape. The method of claim 6, The upper end of the support plate is a portable terminal, characterized in that the pressing extension protrusion is further formed to press the connection tape. The method of claim 5, The connection tape is a mobile terminal, characterized in that attached to at least one of the support plate and the bracket. The method of claim 4, wherein The upper end of the support plate and the lower portion of the bracket is a portable terminal, characterized in that attached by an insulating tape.

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