KR101529920B1 - Portable terminal - Google Patents

Abstract

The present invention relates to a portable terminal including a terminal case having a window on a front surface thereof for protecting a display and having a keypad mounting hole formed on one side of the window, A keypad mounted on the keypad mounting hole and including a metallic support plate; And a metallic bracket attached to the inside of the window and connected to the ground of the circuit board so as to fix the display. Since the electromagnetic radiation directed toward the front of the portable terminal is relatively reduced through the metallic bracket for fixing the display and the metallic supporting plate for supporting the keypad, the characteristics related to the electromagnetic wave absorption rate can be obtained without intentionally lowering the current flowing through the antenna Can be remarkably improved.

Description

[0001] PORTABLE TERMINAL [0002]

The present invention relates to a portable terminal capable of reducing an 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 call function, information input / output function, and data storing function.

As the functions are diversified, the mobile terminal has complicated functions such as photographing and photographing of movies, playing music or moving picture files, receiving games, broadcasting, etc. These devices are integrally mounted and are equipped with a multimedia player .

In order to implement complex functions in multimedia devices, various new attempts have been made in terms of hardware or software. For example, a user interface environment is provided for a user to easily and conveniently search for or select a function.

To receive, transmit, and process wireless signals, the wireless terminal includes RF (Radio Frequency) components. However, since electromagnetic waves generated by RF parts may be harmful to the human body, a method for reducing the electromagnetic waves is being developed. Therefore, in order to quantify the influence of electromagnetic waves on the human body, it is recommended to introduce a Specific Absorption Ratio (SAR) and to produce and use only a mobile device having a standard value or less.

The conventional SAR reduction method is a method of simply lowering the antenna gain and lowering the SAR together, so that the antenna performance is degraded.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable terminal capable of reducing the specific absorption rate (SAR) without causing a deterioration in antenna performance.

According to an aspect of the present invention, there is provided a portable terminal including a terminal case having a window on a front surface thereof for protecting a display and a keypad mounting hole formed on a side of the window, A keypad mounted on the keypad mounting hole and including a metallic support plate; And a metallic bracket attached to the inside of the window and connected to the ground of the circuit board so as to fix the display.

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

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

As an example related to the present invention, the extended portions of the support plate and the extended portions of the bracket may be formed in a plurality and may be staggered so as not to be in contact with each other.

As one 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 disposed so as to be electrically connected when the support plate and the bracket are placed on the connection tape and are fixed in a state where the connection tape is disposed on the inner side of the case.

As an example related to the present invention, a pressing protrusion may be further formed at the upper end of the support plate so as to press the connection tape.

In one embodiment of 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 end portion of the bracket may be attached by insulating tape.

According to the portable terminal related to the present invention configured as described above, the radiation of electromagnetic waves directed toward the front of the portable terminal is relatively reduced through the metallic bracket fixing the display and the metallic supporting plate supporting the keypad, The characteristic relating to the specific absorption rate of the electromagnetic wave can be remarkably improved without intentionally lowering it.

According to an embodiment of the present invention, the metallic bracket and the support plate can induce decoupling of a high-frequency signal at a spot where the specific absorption rate of electromagnetic waves is high (Hot Spot).

Hereinafter, a portable terminal related to the present invention will be described in detail with reference to the drawings. The suffix "module" and " part "for components used in the following description are given merely for convenience of description, and do not give special significance or role in themselves. Accordingly, it should be noted that "module" and "part" may be used interchangeably.

The portable terminal can be implemented in various forms. For example, the terminal described in this specification may include a mobile terminal such as a mobile phone, a smart phone, a notebook computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player) And fixed terminals such as a digital TV, a desktop computer, 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 be applied to a fixed terminal, except for a component specially configured for mobile use.

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

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

The components will be discussed in turn.

The wireless communication unit 110 may include one or more components for wireless communication between the wireless terminal 100 and another wireless communication system or wireless communication between the wireless terminal 100 and the network in which the wireless 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, and a location information module 115 .

The broadcast receiving module 111 receives broadcast signals 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 be a server for generating and transmitting broadcast signals and / or broadcast-related information, or a server for receiving broadcast signals and / or broadcast-related information generated by the broadcast server and transmitting the generated broadcast signals and / or broadcast- 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 a TV broadcast signal, a radio broadcast signal, a data broadcast signal, and a broadcast signal in which a data broadcast signal is combined with a TV broadcast signal or a radio broadcast signal.

The broadcast-related information may also be provided through a mobile communication network, in which case it may be received by the mobile communication module 112.

Broadcast-related information can exist in various forms. For example, an EPG (Electronic Program Guide) of DMB (Digital Multimedia Broadcasting) or an ESG (Electronic Service Guide) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 receives broadcast signals using various broadcasting systems. In particular, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S) ), Digital Video Broadcast-Handheld (DVB-H), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and the like. Of course, the broadcast receiving module 111 is configured to be suitable for all the broadcasting systems that provide broadcast signals as well as the digital broadcasting 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 radio signals to 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 depending on a voice call signal, a video call signal, or a text / multimedia message transmission / reception.

The wireless Internet module 113 is a module for wireless Internet access, and the wireless Internet module 113 can be built in or externally. WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as wireless Internet technologies.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, radio frequency identification (RFID), infrared data association (IrDA), ultra wideband (UWB), ZigBee, and the like can be used as the short distance communication technology.

The location information module 115 is a module for confirming or obtaining the location of the mobile terminal. A typical example of the location information module is a Global Position System (GPS) 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 a trigonometric method to the calculated information to calculate three-dimensional current position information according to latitude, longitude, Can be accurately calculated. At present, 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 can calculate speed information by continuously calculating the current position in real time.

An audio / video (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. Then, the processed image frame can 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 through a microphone in a communication mode, a recording mode, a voice recognition mode, or the like, and processes it as electrical voice data. The processed voice data can be converted into a form that can be transmitted to the mobile communication base station through the mobile communication module 112 when the voice data is in the call mode, and output. The microphone 122 may be implemented with various noise reduction algorithms for eliminating noise generated in the process of receiving an external sound signal.

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

The sensing unit 140 senses the current state of the portable terminal 100 such as the open / close state of the portable terminal 100, the position of the portable terminal 100, the presence of the user, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the portable terminal 100. For example, when the portable terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. Also, it is responsible for a sensing function related to whether or not the power supply unit 190 is powered on, whether the interface unit 170 is connected to an external device, and the like. Meanwhile, the sensing unit 140 may include a proximity sensor 141. This will be discussed later in connection with touch screens.

The interface unit 170 serves as an interface with all the external devices connected to the portable terminal 100. For example, a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, a port for connecting a device having an identification module, an audio I / O port, Video input / output (I / O) ports, earphone ports, and the like. Here, the identification module is a chip that stores various information for authenticating the usage right of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identity module (SIM) ), A Universal Subscriber Identity Module (" USIM "), and the like. In addition, an apparatus having an identification module (hereinafter referred to as 'identification device') can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port. The interface unit 170 receives data from an external device or receives power from the external device, transfers the data to each component in the portable terminal 100, or transmits data in the portable terminal 100 to an external device.

The interface unit 170 may be a path 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 the user It can be a passage to be transmitted to the mobile terminal. The various command signals or power input from the cradle may be operated as a signal 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, and 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 the information processed by the portable terminal 100. For example, when the mobile terminal is in the call mode, a user interface (UI) or a graphical user interface (GUI) associated with a call is displayed. And displays the captured or / and received image or UI and GUI.

Meanwhile, as described above, when the display unit 151 and the touch pad have a mutual layer structure to constitute a touch screen, the display module 151 can 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 viewed from outside. This can be referred to as a transparent display. A typical example of the transparent display is a transparent LCD or the like. In addition, there may be two or more display units 151 according to the embodiment of the portable terminal 100. The touch screen can be configured to detect not only the touch input position and area but also the touch input pressure.

On the other hand, 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 a nearby object without mechanical contact using the force of an electromagnetic field or infrared rays. Therefore, the proximity sensor has a considerably longer life than the contact-type sensor and its utilization is also quite high. Examples of proximity sensors include a transmission type photoelectric sensor, a direct reflection type photoelectric sensor, a mirror reflection type photoelectric sensor, a high frequency oscillation type 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 vicinity of the sensor sensing surface in the state of oscillating the high frequency of the stationary wave in the oscillation circuit, the oscillation amplitude of the oscillation circuit is attenuated or stopped, Is detected. Therefore, even if any non-metallic substance 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, it may be configured to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer if the touch screen is electrostatic.

Thus, in the case where the pointer is not actually touched but located close to the touch screen, the position of the pointer and the distance between the pointer and the touch screen can be detected. Hereinafter, for the sake of convenience of explanation, the act of causing the pointer to be located on the touch screen and recognizing that the pointer is located on the touch screen is referred to as "proximity touch" Quot; contact touch ". Further, the position where the proximity touch is performed with the pointer on the touch screen means a position where the pointer corresponds vertically to the touch screen when the pointer is proximity-touched.

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

The audio 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 mode, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, The sound output module 152 outputs sound signals related to functions (e.g., call signal reception sound, message reception sound, and the like) performed in the portable 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 the occurrence of an event of the portable terminal 100. Examples of events that occur in the mobile terminal include call signal reception, message reception, key signal input, touch input, and the like. The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than an audio signal or a video signal. For example, it is possible to output a signal in a vibration mode. When the call signal is received or a message is received, the alarm unit 153 can output a vibration to notify it. Alternatively, when the key signal is input, the alarm unit 153 can output the vibration by the feedback to the key signal input. The user can recognize the occurrence of an event through the vibration output as described above. Of course, a signal for notifying the occurrence of an event may also be output through the display unit 151 or the audio output module 152.

The memory unit 160 may store a program for processing and control of the controller 180 and may include a function for temporarily storing input / output data (e.g., a phone book, a message, a still image, . ≪ / RTI > In addition, the memory unit 160 may store data related to vibration and sound of various patterns output upon touch input on the touch screen.

The memory unit 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory) A random access memory (SRAM), a read only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM) , An optical disc, and the like. In addition, the portable terminal 100 may operate a web storage that performs a storage function of the memory unit 160 on the Internet.

The control unit 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, 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 control unit 180 or may be implemented separately from the control unit 180. [

The control unit 180 can perform a pattern recognition process capable of recognizing the handwriting input or the drawing input performed on the touch screen as characters and images, respectively.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

The various embodiments described herein may be embodied 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 may be implemented as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays May be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing functions. In some cases, May be implemented by the control unit 180. According to a software implementation, embodiments such as procedures or functions may be implemented with separate software modules that 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 form of the portable terminal related to the present invention will be described in detail with reference to FIG. 2 to FIG.

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

The casing (casing, housing, cover, etc.) constituting the outer appearance 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 additionally disposed between the front case 102 and the rear case 103. [ The cases 102, 103 and 104 may be formed by injection molding of synthetic resin, or may be made of a metal material such as stainless steel (STS) or titanium (Ti), or ceramics.

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

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

The display unit 151 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diodes) module, an e-paper, and a TOLED (Transparent OLED) for visually expressing information. Also, the display unit 151 includes touch sensing means to receive information or control commands by the user's touch. The touch sensing means may include a transparent electrode film disposed inside the window, and a resistance film method or an electrostatic method may be applied.

The first sound output unit 152 may be implemented as a receiver or a loudspeaker.

The first image input unit 121 may be implemented in the form of a camera module for capturing an image or a moving image 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 a side surface of the terminal body 101.

2, a second operating unit 132, an interface unit 170, a broadcast signal receiving antenna 116, and the like may be disposed on a side surface of the portable terminal 100. [

The second operating portion 132 may be installed on a side surface of the terminal body 101. The second operating portion 132 together with the first operating portion 131 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner. For example, the operation unit may be implemented by a dome switch or a touch screen, a touch pad, or a wheel, a jog type, a joystick, or the like, As shown in FIG.

In a functional aspect, the first operation unit 131 is for inputting information such as numbers, letters, symbols, or a menu such as start, end, etc., and the second operation unit 132 is for inputting, Or as a hot-key for performing a special function such as activation of the input unit 121 and the like.

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

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

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

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 on the rear case 103 for supplying power to the portable terminal. The power supply unit 190 may be detachably coupled to the power supply unit 190 for charging, for example, as a battery that can be charged in a wired or wireless manner from the supplied power supply. The power supply unit 190 may be disposed so as not to be seen 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 a speakerphone mode.

The second image input unit 125 may have a photographing direction substantially opposite to that of the first image input unit 121 (see FIG. 2), and may be a camera having different pixels from the first image input unit 121. For example, the first image input unit 121 has low pixels so that it is easy to capture a face of a user in the case of a video call or the like and transmit the face of the user to the other party. The second image input unit 125 photographs a general object It is preferable to have a high pixel because it is often not transmitted.

A flash 127 and a mirror 126 are further disposed adjacent to the second image input unit 125. [ The flash 127 illuminates the subject when the subject is photographed by the second image input unit 125. The mirror unit 126 allows the user to illuminate the user's own face or the like when the user intends to photograph the user himself / herself (self-photographing) using the second image input unit 125. [

In the above description, the first operating portion 131 and the like are described as being attached to the front case 102 and the second operating portion 132 and the like are attached to the rear case 103, but the present invention is not limited to such a position. For example, the second operating portion 132 may be disposed in the front case 102 adjacent to the first operating portion 131. [ Further, the first image input unit 121 may be rotatably formed so that the second image input unit 125 can be photographed even if the second image input unit 125 is not separately provided.

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

On the front surface of the front case 102, a window 201 having a translucent area is formed to protect the display 151. A keypad mounting hole 102a is formed on one side of the window 201 so that a 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. Numerals, characters, or symbols may be engraved on the key top 221 by printing, etching, perforation, or the like. The key tops 221 are integrally connected to the connection pads 225 by molding or injection molding.

The connection pad 225 may be formed to be translucent or translucent so that the light generated from the light source can illuminate the key top 221. A pressing protrusion 226 is formed on the inner surface of the connection pad 225 so that the dome switch 211 of the circuit board 210 can be easily pressed.

The support plate 223 may be formed of a metal such as stainless steel (STS) so as to be able to withstand the repeated deformation while retaining the rigidity of the keypad 220.

The connection pad 225 and the key top 221 may be manufactured to be integrally connected by a method such as double injection. For this purpose, a through hole 223a is formed in the support plate 223 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 latching jaw so that the keypad 220 is caught in the installation hole 102a.

An extension portion 227 is formed at the upper end of the support plate 223 and the connection pad 225 to fix the keypad 220 to the front case 102. The extension portion 227 is formed with a through hole 227a and the through hole 227a is caught and fixed to the fixing protrusion 205 formed on the inner surface of the front case 102. [

4, in order to connect the support plate 223 to the ground of the circuit board 210, one end of the support plate 223 is electrically connected to the circuit board 210 when the front case 102 is assembled. A ground cushion 280 is disposed.

A bracket 250 is attached to the inner surface of the window 201 to fix the display 151 thereon. To this end, the bracket 250 may include a side frame structure 251 for wrapping the side surface of the display 151. Inside the side frame structure 251, Member (see reference numeral 256 in Figs. 5 to 7) may be provided.

Extensions 253 and 254 are formed around the bracket 250 to fix the bracket 250 to the inner surface of the window 201. [ The extended portions 253 and 254 may be formed with through holes 253a and the through holes 253a are engaged with the fixing projections 206 formed on the inner surface of the window 201 and fixed.

A ground pad 216 for connecting the bracket 250 to the ground of the circuit board 210 is formed at an upper end of the circuit board 210. Corresponding to this, a first grounding tape 261, which is pressed when the bracket 250 is fixed and maintains contact with the bracket 250, is provided at the upper end of the bracket 250. The first grounding tape 261 may be formed by weaving a thin metal yarn. A conductive elastic member 262 may be included at the end of the first grounding tape 261 so as to pressurize and contact the grounding pad 216 elastically when the front case 102 is pushed.

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

An antenna 270 for wireless communication of the portable terminal 100 may be disposed at one corner of the terminal cases 102, 103, and 104. In Fig. 4, it is shown that it is arranged on the lower rear side of the circuit board 210. Fig. The feeding part 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 rear view of the front case for showing a state where the keypad and the bracket of FIG. 4 are coupled to the front case, and FIG. 6 is an enlarged view of a portion where the bracket and the support plate are adjacent to each other.

The bracket 250 coupled to the rear surface of the front case 102 and the support plate 223 of the keypad 220 are spaced apart from each other by a predetermined distance g. That is, the bracket 250 and the support plate 223 are integrally connected or disposed at a certain distance from each other, so that a decoupling effect can be obtained for a high frequency.

An extension 253 formed at the lower end of the bracket 250 and an extension 253 formed at the upper end of the support plate 223 so that the bracket 250 and the support plate 223 can be fixed to the back surface of the front case 102. [ (227) are mutually staggered so as to be spaced apart and fixed at the same time. The through holes 253a and 227a formed in the extended portions 253 and 227 are respectively engaged and fixed to fixing projections 206 and 205 formed on the back surface of the front case 102. [

Accordingly, the separation between the bracket 250 and the support plate 223 induces decoupling with respect to the high frequency, so that the direction of the main radiation advances in the forward direction of the front case 102, that is, in the direction opposite to the direction of the human body . Accordingly, the space in which electromagnetic waves are absorbed by the human body is reduced so much that the effect of decreasing the Specific Absorption Ratio (SAR) value can be expected.

5, a conductive connection tape 291 for electrically connecting the bracket 250 and the support plate 223 is disposed at one side of the bracket 250 adjacent to the support plate 223. The support plate 223 and the bracket 250 are connected to each other by the connection tape 291 when the support plate 223 and the bracket 250 are next mounted with the connection tape 291 disposed on the inner surface of the front case 102. [ (See FIG. 6). For this purpose, a pressing protrusion 224 may be formed at the upper end of the support plate 223 so as to press the connection tape 291.

The connection tape 291 may be formed by weaving a thin metal yarn. Further, the conductive connection tape 291 serves to prevent the gain of the low band from being reduced.

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

7 is a rear view of a front case for showing a connected state of a bracket and a keypad support plate according to another embodiment of the present invention. Referring to FIG. 7, the bracket 250 and the support plate 223 are spaced apart from each other, but are electrically connected to each other at a plurality of locations by connection tapes 292 and 293. On the other hand, unlike FIG. 6, there is a difference in that a plurality of connecting tapes 292 and 293 are mounted on the bracket 250 and attached. The connection tabs 292 and 293 can be attached to at least one of the bracket 250 and the support plate 223. Here, the separation between the bracket 250 and the support plate 223 minimizes the radiation of electromagnetic waves toward the human body without lowering the gain of the antenna through high frequency decoupling. The connecting tapes 292 and 293 may have the form of a thin metal yarn woven.

The above-described portable terminal may be configured such that all or some of the embodiments may be selectively combined so that various modifications may be made without limiting the structure and method of the illustrated embodiments.

1 is a block diagram of a mobile terminal according to the present invention;

2 is a front perspective view of a portable terminal according to the present invention.

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

Fig. 4 is an exploded perspective view of the portable terminal of Fig.

FIG. 5 is a view showing a state where the keypad and the bracket of FIG. 4 are coupled to the front case,

Fig. 6 is an enlarged view of an enlarged view of a portion where the bracket and the support plate are adjacent to each other in Fig. 5

7 is a rear view of a front case for showing a connected state of a bracket and a keypad support plate,

Claims (9)

A terminal case having a window on the front thereof so as to protect the display and having a keypad mounting hole formed on one side of the window; An antenna disposed at a lower end of the circuit board; A keypad mounted on the keypad mounting hole and including a metallic support plate; And And a metallic 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, Wherein an upper portion of the support plate of the keypad and an upper portion of the bracket are respectively provided with an extension portion having a through hole for fixing the support plate and the bracket to the terminal case, and a plurality of extension portions of the support plate and the bracket are formed And the support plate and the bracket of the keypad are disposed to be spaced apart from each other so as to perform RF decoupling. delete delete delete The method according to claim 1, Wherein the support plate and the bracket are electrically connected by a conductive connection tape. 6. The method of claim 5, Wherein the connection tape is disposed on the inner surface of the case so that the support plate and the bracket are electrically connected to each other by being fixed on the connection tape. The method according to claim 6, And an extension protrusion is formed on an upper end of the support plate so as to press the connection tape. 6. The method of claim 5, Wherein the connection tape is attached to at least one of the support plate and the bracket. The method according to claim 1, Wherein an upper end of the support plate and a lower end portion of the bracket are attached by insulating tape.

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