KR20140040975A

KR20140040975A - Mobile terminal

Info

Publication number: KR20140040975A
Application number: KR1020120107711A
Authority: KR
Inventors: 차영도
Original assignee: 엘지전자 주식회사
Priority date: 2012-09-27
Filing date: 2012-09-27
Publication date: 2014-04-04

Abstract

A mobile terminal comprises a case which includes a first sound hole for collecting sound; a circuit board which is mounted inside the case and to which a second sound hole is formed; a microphone element which is mounted on one surface of the circuit board and includes a third sound hole, at the bottom, communicating with the second sound hole; and a sound shield which is interposed between the inner side surface of the case and the other surface of the circuit board and includes a first surface which is in contact with the first sound hole, a second surface which is in contact with the second sound hole, and a sound channel connecting the first sound hole and the second sound hole. The mobile terminal connects a gap between the sound hole formed on the case and the sound hole formed on the microphone element and absorbs external shock applied to the microphone element by using the sound shield disposed on the back surface of the microphone element.

Description

[0001] MOBILE TERMINAL [0002]

The present invention relates to a mobile terminal having a sound shield having an acoustic channel between a microphone element and an acoustic hole formed in a case.

The terminal can move And can be divided into a mobile / portable terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. The mobile terminal can be divided into a handheld terminal and a vehicle mount terminal according to whether the user can directly carry the mobile terminal.

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. .

The mobile terminal is provided with a microphone for recording the user's voice and surrounding sounds. It is preferable to install in the front of the bottom of the mobile terminal close to the user's mouth, but recently formed in the bottom of the mobile terminal in accordance with the trend to minimize the structure visible on the front, the sound channel between the microphone and the sound hole formed in the case It became necessary.

The present invention relates to a sound shield having an acoustic channel between a microphone element of a mobile terminal and a sound hole formed in a case in order to solve the above problems, and an object of the present invention is to provide a mobile terminal that is not easily damaged by an external impact.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

A case in which a first sound hole for collecting sound is formed; A circuit board mounted inside the case and having a second sound hole formed therein; A microphone element mounted on one surface of the circuit board and including a third sound hole communicating with the second sound hole at a bottom thereof; And a first surface interposed between the inner surface of the case and the other surface of the circuit board and communicating with the first surface contacting the first sound hole, the second surface contacting the second sound hole, and the first sound hole and the second sound hole. The present invention provides a mobile terminal including a sound shield including an acoustic channel.

The first sound hole is formed around the side of the case, the second sound hole and the third sound hole is formed in the front and rear direction, characterized in that the acoustic channel is bent in a '-shape.

The sound shield may include a third surface coupled to the case on the opposite side of the second surface, and may further include an adhesive tape interposed between the third surface and the case to fix the sound shield to the case. have.

The sound shield may be made of an elastic material that is reversibly changed in shape when pressed.

A distance between both ends of the acoustic channel is longer than a distance between the first hole and the second hole, and the sound shield may be closely coupled to the case and the circuit board.

The compression shield may further include a compression protrusion formed around the first sound hole inside the case, and the sound shield may be deformed so as to correspond to the shape of the compression protrusion when coupled to the case.

The apparatus may further include a shock absorbing pad attached to an upper surface of the microphone element.

The circuit board may be made of a flexible material.

According to at least one embodiment of the present invention, by using a sound shield located on the back of the microphone element, it is possible to absorb the external shock applied to the microphone element while communicating between the sound hole formed in the case and the sound hole formed in the microphone element spaced apart. Can be.

In addition, the degree of freedom is increased in the position of the sound hole of the microphone element and the sound hole of the case.

In addition, since the microphone element and the sound shield are coupled to the opposite side of the circuit board, the microphone element and the circuit board are not separated by the shear force by the sound shield.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention.
2 is a front perspective view of a mobile terminal according to an embodiment of the present invention.
3 is a rear perspective view of a mobile terminal according to an embodiment of the present invention.
4 is a cross-sectional view showing a microphone element portion of a mobile terminal according to an embodiment of the present invention.
5 is a perspective view illustrating a sound shield of a mobile terminal according to one embodiment of the present invention;
6 is a plan view illustrating a front surface and a sound shield of a rear case of a mobile terminal according to one embodiment of the present invention;
7 is a perspective view illustrating a sound shield mounted on a rear case of a mobile terminal according to an embodiment of the present invention.

Hereinafter, a mobile terminal related to the present invention will be described in detail with reference to the drawings. 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.

The mobile terminal described in this specification may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and navigation.

However, it will be understood by those skilled in the art that the configuration according to the embodiments described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, unless the configuration is applicable only to a mobile terminal.

1 is a block diagram of a mobile terminal according to an embodiment of the present invention. The mobile 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 160, A controller 170, a controller 180, a power supply 190, and the like. The components shown in FIG. 1 are not essential, and a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules for enabling wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and the 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, 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. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching for at least two broadcast channels.

The broadcast management server may refer to 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 management server and transmitting the generated broadcast signals and / or broadcast related information. 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 means information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast-related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast-related information may 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).

For example, the broadcast receiving module 111 may be a Digital Multimedia Broadcasting-Terrestrial (DMB-T), a Digital Multimedia Broadcasting-Satellite (DMB-S), a Media Forward Link Only (Mobile Broadcasting Business Management System), ISDB-T (Integrated Services Digital Broadcasting (ISDB-T)), Digital Multimedia Broadcasting (MBMS) Digital Broadcast-Terrestrial) or the like. Of course, the broadcast receiving module 111 may be adapted to other broadcasting systems 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 160.

The mobile communication module 112 may be coupled to a base station, an external terminal, or a server on a mobile communication network, such as, but not limited to, Gobal System for Mobile communications (GSM), Code Division Multiple Access (CDMA), Wideband CDMA Transmits and receives wireless signals with one. 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 may be built in or externally attached to the mobile terminal 100. Wireless Internet technologies include WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access), GSM, CDMA, WCDMA, LTE Evolution (but not limited to) may be used.

The wireless Internet module 113, which performs wireless Internet access through the mobile communication network, is connected to the mobile communication module 110 through the mobile communication network, for example, from the viewpoint that the wireless Internet access by Wibro, HSDPA, GSM, CDMA, WCDMA, LTE, (112). &Lt; / RTI >

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 a short range communication technology.

The position information module 115 is a module for obtaining the position of the mobile terminal, and a representative example thereof 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 trigonometry to the calculated information to obtain a three-dimensional string of latitude, longitude, The location information can be accurately calculated. At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information 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.

Referring to FIG. 1, an A / V (Audio / Video) 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 image frames such as still images or moving images obtained by the image sensor in the video communication mode or the photographing mode. 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. [ Two or more cameras 121 may be provided depending on the use environment.

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. Various noise reduction algorithms may be implemented in the microphone 122 to remove noise generated in 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 button 136 located on the front, rear, or side of the mobile terminal 100, and a touch sensor (static / static) 137. Although not shown, ), A dome switch, a jog wheel, a jog switch, and the like.

The sensing unit 140 senses the current state of the mobile terminal 100 such as the open / close state of the mobile terminal 100, the position of the mobile terminal 100, the presence or absence of user contact, the orientation of the mobile terminal, And generates a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it is possible to sense whether the slide phone is opened or closed. It is also possible to sense whether 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. (The proximity sensor will be described later).

The output unit 150 is for generating output related to the visual, auditory or tactile sense and includes a display unit 151, an audio output module 152, an alarm unit 153, and a haptic module 154 .

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in the call mode, a UI (User Interface) or a GUI (Graphic User Interface) associated with a call is displayed. When the mobile terminal 100 is in the video communication mode or the photographing mode, the photographed and / or received video or UI and GUI are displayed.

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, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type. With this structure, the user can see an object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the embodiment of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

In the case where the display unit 151 and the touch sensor 137 have a mutual layer structure or are integrally formed (hereinafter referred to as a 'touch screen'), the display unit 151 may be used as an input device . The touch sensor 137 may be stacked on the display unit 151 to form a layer structure when the touch sensor 137 has a form of a touch film, a touch sheet, a touch pad, or the like. And may be integrally formed.

The touch sensor 137 may be configured to convert a change in a pressure applied to a specific part of the display part 151 or a capacitance generated in a specific part of the display part 151 into an electrical input signal. The touch sensor 137 can be configured to detect not only the position and area to be touched but also the pressure at the time of touch.

If there is a touch input to the touch sensor 137, the corresponding signal (s) is sent to the touch controller (not shown). The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. Thus, the control unit 180 can know which area of the display unit 151 is touched or the like.

The proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is enclosed by 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. The proximity sensor has a longer life span than the contact sensor and its utilization is also high.

Examples of the proximity sensor 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. And to detect the proximity of the pointer by the change of the electric field along the proximity of the pointer when the touch screen is electrostatic. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of recognizing that the pointer is positioned on the touch screen while the pointer is not in contact with the touch screen is referred to as "proximity touch" The act of actually contacting the pointer on the touch screen may be referred to as "contact touch. &Quot; The location where the pointer is proximately touched on the touch screen may refer to a position where the pointer corresponds vertically to the touch screen when the pointer is touched.

The proximity sensor detects a proximity touch and a proximity touch pattern (e.g., a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, a proximity touch movement state, and the like). Information corresponding to the detected proximity touch operation and the proximity touch pattern may be output on the touch screen.

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

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the mobile 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 the video signal or the audio signal, for example, vibration. In this case, the display unit 151 and the audio output module 152 may be a type of the alarm unit 153. The display unit 151 and the audio output module 152 may be connected to the display unit 151 or the audio output module 152, .

The haptic module 154 generates various tactile effects that the user can feel. A typical example of the haptic effect generated by the haptic module 154 is vibration. The intensity and pattern of the vibration generated by the hit module 154 can be controlled. For example, different vibrations may be synthesized and output or sequentially output.

In addition to the vibration, the haptic module 154 may include a pin arrangement vertically moving with respect to the contact skin surface, a spraying force or suction force of the air through the injection port or the suction port, a touch on the skin surface, contact with an electrode, And various tactile effects such as an effect of reproducing a cold sensation using an endothermic or exothermic element can be generated.

The haptic module 154 can be implemented not only to transmit the tactile effect through the direct contact but also to allow the user to feel the tactile effect through the muscular sensation of the finger or arm. At least two haptic modules 154 may be provided according to the configuration of the mobile terminal 100.

The memory unit 160 may store a program for processing and controlling the control unit 180 and temporarily store the input / output data (e.g., telephone directory, message, audio, For example. The memory unit 160 may store the frequency of use of each of the data (for example, each telephone number, each message, and frequency of use for each multimedia).

In addition, the memory unit 160 may store data on vibration and sound of various patterns output when the touch is input on the touch screen.

The memory 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 RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory), EEPROM (Electrically Erasable Programmable Read-Only Memory), PROM A disk, and / or an optical disk. The mobile terminal 100 may operate in association with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path for communication with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device or supplies power to each component in the mobile terminal 100 or transmits data to the external device. 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, A video input / output (I / O) port, an earphone port, and the like may be included in the interface unit 170.

The identification module is a chip for storing various information for authenticating the use right of the mobile terminal 100 and includes a user identification module (UIM), a subscriber identity module (SIM), a general user authentication module A Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

When the mobile terminal 100 is connected to an external cradle, the interface unit may be a path through which power from the cradle is supplied to the mobile terminal 100, or various command signals input by the user to the cradle may be transmitted It can be a passage to be transmitted to the terminal. The various command signals or the power source input from the cradle may be operated as a signal for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, voice communication, data communication, video communication, and the like. 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 controller 180 may perform a pattern recognition process for recognizing handwriting input or 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 power supply unit 190 may include, for example, a battery, a connection port, a power supply control unit, and a charge monitoring unit.

The battery may be an internal battery configured to be chargeable, and may be detachably coupled to the terminal body for charging or the like. The connection port may be configured as an example of the interface unit 170 to which an external charger for supplying power for charging the battery is electrically connected.

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 a processor, controllers, micro-controllers, microprocessors, and other electronic units for performing other functions. In some cases, The embodiments described may be implemented by the control unit 180 itself.

According to a software implementation, embodiments such as the procedures and functions described herein may be implemented with separate software modules. Each of the software modules may perform one or more of the functions and operations described herein. Software code can be implemented in a software application written in a suitable programming language. The software code is stored in the memory 160 and can be executed by the control unit 180. [

FIG. 2 is a perspective view of a mobile terminal or a portable terminal according to the present invention, as viewed from the front.

The disclosed 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 slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The body of the mobile terminal 100 includes a casing 101, 102, In this embodiment, the case may be divided into a front case 101 and a rear case 102. [ A variety of electronic components are embedded in the space formed between the front case 101 and the rear case 102.

A component such as a USIM card and a memory card, such as an auxiliary storage medium 165, which may be detached, may include an opening in the case so as to be inserted into the case from the outside. Slots may be formed on the side of the case so that the auxiliary storage medium 165 may be inserted from the side of the mobile terminal 100 and card slots 166 and 167 may be formed on the surface of the rear case 102 It is possible.

The cases 101, 102, and 103 may be formed by injection molding synthetic resin or may be formed of a metal material such as stainless steel (STS) or titanium (Ti).

In the terminal cases 101 and 102, a display unit 151, an audio output unit 152, a camera 121, a user input unit 130/131, 132, a microphone 122, an interface unit 170, and the like may be disposed. .

The display unit 151 occupies most of the main surface of the front case 101. The sound output unit 152 and the camera 121 are disposed in regions adjacent to one end of both ends of the display unit 151, and the user input unit 131 is disposed in the region adjacent to the other end. The user input unit 132 and the interface unit 170 may be disposed on the side surfaces of the front case 101 and the rear case 102. [

The user input unit 130 is operated to receive a command for controlling the operation of the mobile terminal 100 and may include a plurality of operation units 131, 132, and 133. The operation units 131, 132, and 133 may be collectively referred to as a manipulating portion.

The contents inputted by the first or second operation unit 131 or 132 may be variously set. For example, the first operation unit 131 receives a command such as start, end, scroll, and the like, and the second operation unit 132 inputs a command such as adjustment of the sound output from the sound output unit 152 And the third operation unit 133 can receive commands such as activation / deactivation of the touch recognition mode of the display unit 151 and the like.

The operation units 131, 132 and 133 may have a button system recognized when a user applies pressure and a touch sensor 137 may be provided to the operation units 131, 132 and 133 in addition to the display unit 151 So that the user's command can be received only by the user's touch.

3 is a rear perspective view of the mobile terminal shown in FIG. 2.

Referring to FIG. 3, a camera 121 'may be further mounted on the rear surface of the terminal body, that is, the rear case 102. The camera 121 'may have a photographing direction substantially opposite to the camera 121 (see FIG. 2), and may be a camera having the same or different pixels as the camera 121.

For example, the camera 121 may have a low pixel so that the face of the user can be photographed and transmitted to the other party in case of a video call or the like, and the camera 121 ' It is preferable to have a large number of pixels. The cameras 121 and 121 'may be installed in the terminal body such that they can be rotated or pop-up.

A flash 123 and a mirror 124 may be additionally disposed adjacent to the camera 121 '. The flash 123 illuminates the subject when the subject is photographed by the camera 121 '. The mirror 124 allows the user to illuminate the user's own face or the like when the user intends to shoot himself / herself (self-photographing) using the camera 121 '.

An acoustic output 152 'may be additionally disposed on the rear surface of the terminal body. The sound output 152 'on the rear side of the body may implement the stereo function together with the sound output 152 (see FIG. 2) of the front side of the body, and may be used for the implementation of the speakerphone mode during a call.

In addition to the antenna for talking and the like, a broadcast signal reception antenna 116 may be additionally disposed on the side of the terminal body. The antenna 116, which forms part of the broadcast receiving module 111 (see FIG. 1), can be installed to be able to be drawn out from the terminal body.

The microphone 122 is disposed at the lower end of the terminal body and is positioned at the lower left side when viewed from the rear in the drawing, but may be formed to the left or the right side or at the center. However, since the interface unit 170 or the like is disposed in the center, the present embodiment will be described based on the lower left side of the rear surface and the lower right side of the front surface.

FIG. 4 is a cross-sectional view of a microphone device 1220 of a mobile terminal according to an embodiment of the present invention. The microphone device 1220 is located in an internal space formed between the front case 101 and the rear case 102. , Circuit board 185 and sound shield 350 are shown.

Sound is collected into the mobile terminal through the second sound hole 1221 formed in the case and transmitted to the microphone device 1220. That is, the microphone element 1220 is located inside the second sound hole 1221 formed at the lower end of the case.

The microphone element 1220 is a device for converting a sound such as a voice into an electrical signal. When the sound introduced through the second sound hole 1221 passes through the diaphragm of the microphone element 1220 and the diaphragm vibrates by sound waves, Convert the vibration of the diaphragm into a digital signal. In recent years, the MEMS microphone element 1220 and the like have been used while making the size smaller.

The microphone device 1220 is mounted on the circuit board 185 to transmit an electrical signal converted through a circuit pattern of the circuit board 185 to the controller. In general, although the microphone device 1220 itself has a sound hole formed on the opposite side to the bottom surface mounted on the circuit board 185, that is, on the top surface thereof, the microphone device 1220 according to the present invention has a sound on the bottom surface in contact with the circuit board 185. The hole 1223 is provided. An acoustic hole 1222 is formed in the circuit board 185 to open the acoustic hole of the microphone device 1220.

In addition, the circuit board 185 may be made of a rigid material, but may not be easily damaged by an external impact or the like, and a flexible circuit board 185 may be used to increase the degree of freedom of the internal member arrangement.

For convenience, the sound hole of the circuit board 185 is referred to as the second sound hole 1223 and the sound hole of the microphone element 1220. Since the microphone device 1220 is mounted on the circuit board 185, the microphone device 1220 closely contacts the second sound hole 1222 and the third sound hole 1223, but is spaced apart from the second sound hole 1221 of the case.

In particular, as shown in FIG. 4, the microphone element 1220 and the circuit board 185 are disposed in the front-rear direction of the mobile terminal such that the second sound hole 1222 and the third sound hole 1223 are drilled in the front-rear direction. In this case, since the direction does not coincide with the second sound hole 1221 positioned at the bottom of the mobile terminal, a structure for communicating the second sound hole 1222, the third sound hole 1223, and the second sound hole 1221 is required. .

The sound shield 350 is a member that communicates between the first sound hole 1221 and the second sound hole 1222. The sound shield 350 is interposed between the inner surface of the case and the other surface of the circuit board 185. The first surface 351 in contact with the sound hole 1221, the second surface 352 in contact with the second sound hole 1222, and the second sound hole 1221 and the second sound hole 1222 communicate with each other. Acoustic channel 355 is included.

When the second sound hole 1221 is disposed at right angles to the second sound hole 1222 and the third sound hole 1223, the sound channel 355 is formed to be bent in a "-" shape as shown in FIG. 4. can do. The shape of the sound channel 355 may vary depending on the position of the second sound hole 1221 and the arrangement of the microphone device 1220 and the circuit board 185.

The second surface 352 is in contact with the circuit board 185 and the first surface 351 adjacent to the second surface 352 is coupled to the side circumference of the case where the first hole is formed. The third surface 353 opposite to the second surface 352 is coupled to the rear case 102 of the mobile terminal. FIG. 5 is a perspective view of the sound shield 350 showing the first surface 351 and the third surface 353. The sound shield 350 may have a rectangular parallelepiped shape. It may be configured to contact only the perimeter 1221.

The sound shield 350 may be made using an elastic material such as rubber or silicon. When the elastic material is used, the shape may be reversibly changed within a predetermined range when a force is applied. When the length of the sound channel 355 is formed longer than the distance between the second sound hole 1221 and the second sound hole 1222, the sound channel 355 is formed of the second sound hole 1221 and the second sound hole ( 1222, the first surface 351 and the second surface 352 of the sound shield 350 are pressed to closely contact the case and the circuit board 185.

Alternatively, as illustrated in FIG. 4, the pressing protrusion 1224 may be formed on the inner surface of the case contacting the first surface 351 of the sound shield 350, that is, the inner circumference of the second sound hole 1221. When the sound shield 350 is coupled to each other while the first surface 351 is inserted to correspond to the shape of the crimp protrusion 1224 when the sound shield 350 is coupled, the sound shield 350 may be transmitted to the second sound hole 1222 without leaking sound.

When the second surface 352 is in contact with one surface of the circuit board 185 and has a wide contact area and is made of a material such as rubber or silicon, the second surface 352 has a large surface friction coefficient, so that the sound is between the second sound hole 1222 and the sound channel 355. Does not exit.

The bottom surface of the microphone device 1220 may be protected by the sound shield 350 described above, but if the top surface directly contacts the case, there is a risk of damage due to external impact. In order to prevent this, as illustrated in FIG. 4, the shock absorbing pad 1225 may be attached to the top surface of the microphone device 1220.

Next, a method of coupling the sound shield 350 to the mobile terminal will be described with reference to FIGS. 6 and 7. 6 illustrates an inner side surface of the rear case 102 and is viewed from the front direction of the mobile terminal. Since the microphone element 1220 is mounted on the lower right side, the sound shield 350 is disposed at a position corresponding thereto.

As shown in FIG. 7, the sound shield 350 is first coupled to the rear case 102 and adhered between the rear case 102 and the third side 353 of the sound shield 350 to couple to the rear case 102. The tape 360 may be interposed. The sound shield 350 is coupled to the rear case 102, and the second sound hole 1222 is connected to the sound channel 355 on the circuit board 185 on which the microphone element 1220 is mounted. Combine to communicate.

In this case, the adhesive may be attached between the circuit board 185 and the sound shield 350 using an adhesive or an adhesive tape. However, the sound shield 350 and the circuit board 185 have a large adhesive area, so that the sound shield may be closely attached to the sound shield. 350 may not be separated from the circuit board 185.

As described above, according to at least one embodiment of the present invention, an external shock applied to the microphone while communicating between the sound hole formed in the case and the sound hole formed in the microphone is spaced by using the sound shield located on the back of the microphone. It can absorb.

In addition, the degree of freedom is increased in the position of the microphone's sound hole and the case's sound hole.

In addition, the microphone and the sound shield are coupled to the opposite side of the circuit board so that the microphone and the circuit board are not separated by the shear force by the sound shield.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

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 110: wireless communication unit
120: A / V input / output unit 130: user input unit
140: sensing unit 150: output unit
160: memory 170: interface section
180: control unit 185: circuit board
101, 102, 103: Case 350: Sound shield
351: first side 352: second side
353: third page 355: acoustic channel
360: adhesive tape 1220: speaker
1221: first sound hole 1222: second sound hole
1223: third sound hole 1224: the pressing projection
1225: shock absorbing pad

Claims

A case in which a first sound hole for collecting sound is formed;
A circuit board mounted inside the case and having a second sound hole formed therein;
A microphone element mounted on one surface of the circuit board and including a third sound hole communicating with the second sound hole at a bottom thereof; And
Interposed between the inner surface of the case and the other surface of the circuit board, the first surface contacting the first sound hole, the second surface contacting the second sound hole, and the first sound hole and the second sound hole communicating with each other. A mobile terminal comprising a sound shield including an acoustic channel.

The method of claim 1,
The first sound hole is formed around the side of the case,
The second sound hole and the third sound hole are formed in the front and rear directions,
The acoustic channel is a mobile terminal, characterized in that bent in the letter 'L'.

3. The method of claim 2,
The sound shield
A third surface engaging with the case on the opposite side of the second surface,
And an adhesive tape interposed between the third surface and the case to fix the sound shield to the case.

The method of claim 1,
The sound shield is a mobile terminal, characterized in that made of a resilient material that can be reversibly changed in a predetermined range when pressed.

3. The method of claim 2,
Both ends of the acoustic channel is longer than the separation distance between the first hole and the second hole,
The sound shield is coupled to the case and the circuit board, the mobile terminal, characterized in that the close coupling.

The method of claim 1,
Further comprising a crimping projection formed around the first sound hole inside the case;
And the sound shield is deformable to be pulled in to correspond to the shape of the crimping protrusion when coupled to the case.

The method of claim 1,
And a shock absorbing pad attached to an upper surface of the microphone element.

The method of claim 1,
The circuit board is a mobile terminal, characterized in that made of a flexible (flexible) material.