KR20130102358A - Vibration motor and mobile terminal having the same - Google Patents

Abstract

PURPOSE: A vibration motor and a mobile terminal including the same are provided to optimally arrange components and to reduce the size of the mobile terminal by using the vibration motor which horizontally vibrates. CONSTITUTION: A housing includes an inner space for receiving components. The housing includes a first cover (311) and a second cover (312). A coil (360) is formed on the housing. A moving unit (320) reciprocates between a first side and a third side. The first side faces the third side. An elastic member (351,352) is formed between the moving unit and the housing. A roller member (340) rolls in contact with the upper surface or the lower surface of the housing.

Description

Vibration motor and mobile terminal having the same {VIBRATION MOTOR AND MOBILE TERMINAL HAVING THE SAME}

One embodiment of the present invention relates to a vibration motor formed to vibrate a terminal and a mobile terminal having the same.

As the functions are diversified, the terminal is implemented in the form of a multimedia device having a complex function of, for example, taking pictures or moving pictures, playing music or moving picture files, receiving games and receiving broadcasts have.

The terminal can move And may be divided into a mobile terminal and a stationary terminal depending on whether the mobile terminal is a mobile terminal or a mobile terminal. A portable terminal is a portable device having one or more functions capable of performing voice and video communication, capable of inputting / outputting information, and storing data, which can be carried while being portable.

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

In particular, the vibration motor is a component that converts electrical energy into mechanical vibration using the principle of generating electromagnetic force. Such vibration motors are becoming smaller and lighter, and are mounted on portable terminals to provide a silent call notification function or various vibration functions.

In particular, due to the miniaturization and high quality of the portable terminal, LCDs such as a touch screen method have been adopted, and improvement of a vibration motor has become increasingly important, for example, a function of generating vibration when a touch screen is touched.

As one of such improvements, a linear vibration motor can be considered. The linear vibration motor does not use the principle of rotation of the motor but is excited by an electromagnetic force having a resonance frequency determined by using a spring installed inside the vibration motor and a mass suspended from the spring to generate vibration.

Therefore, a method of slimming the vibrating motor or improving the parts used may be considered to operate more efficiently.

An object of the present invention is to provide a vibration motor having a more improved structure, which can make the mobile terminal more slim.

In order to achieve the above object of the present invention, a vibration motor according to an embodiment of the present invention, the housing is formed so that the inner peripheral surface except the upper surface and the lower surface including the first side to the fourth side, and formed in the housing And a moving part formed to reciprocate between the first side and the third side facing each other, the elastic member formed between the moving part and the housing and the upper surface or the lower surface of the housing. It includes a roller member that is formed to be.

According to an example related to the present invention, the roller member may be coupled to the housing.

According to an example related to the present invention, the roller member may be coupled to the moving part.

According to an example related to the present invention, the elastic member may be formed between the moving part and the first side or between the moving part and the third side.

According to an example related to the present invention, the elastic members may be formed in plural, and elastic modulus of the elastic members formed on one side and the elastic members formed on the other side may be different from each other.

According to an example related to the present invention, the moving part or the housing may include an insertion groove so that the elastic members are inserted.

According to an example related to the present invention, the moving unit may include a magnet and a yoke formed to determine a magnetic force direction of the magnet.

According to an example related to the present invention, the housing includes a first cover and a second cover coupled to each other, and the first cover or the second cover has a recessed groove recessed from one surface to allow the coil to be seated. It can be provided.

According to an example related to the present invention, the reciprocating direction of the moving part may be a direction extending from the first side and the third side.

In order to realize the above object, another embodiment of the present invention includes a terminal body and a vibration motor coupled to the main body to have the main body, and the vibration motors are coupled to each other to define an internal space. A housing having a first cover and a second cover, and reciprocating between a first side and a third side facing each other in the inner space according to a change in the coil formed in the housing and the electromagnetic field induced by the coil. Disclosed is a mobile terminal including a moving part to be formed and a roller member formed to be in rolling contact with the first cover or the second cover of the housing.

The mobile terminal according to at least one embodiment of the present invention configured as described above can be designed to reduce the size of the terminal and optimize the arrangement of components in the terminal by using a motor vibrating in the lateral direction.

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 associated with one embodiment;
3 is a rear perspective view of the mobile terminal of FIG. 2;
4 is a perspective view of the battery case in a removed state in FIG.
5 is a partial cross-sectional view taken along the line IV-IV of FIG. 4.
6 is a perspective view of a vibration motor according to the first embodiment of the present invention shown in FIG.
7 is an exploded perspective view of FIG. 6;
8 is a cross-sectional view taken along the line VV of FIG. 6.
9 is a cross-sectional view taken along the line VI-VI of FIG. 6.
10 is a sectional view of a vibration motor according to a second embodiment of the present invention.
FIG. 11 is a perspective view of the movable body shown in FIG. 10. FIG.
12 is a sectional view of a vibration motor according to a third embodiment of the present invention.
FIG. 13 is a perspective view of the second lid shown in FIG. 12. FIG.

Hereinafter, a vibration motor and a mobile terminal having the same according to the present invention will be described in detail with reference to the accompanying drawings. In the present specification, the same or similar reference numerals are given to different embodiments in the same or similar configurations. As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

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.

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 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 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 may refer to a broadcast channel, a broadcast program, or information related to 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, 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).

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 Broadcast-Handheld (ISDB-T), Integrated Services Digital Broadcast-Terrestrial (ISDB-T), and 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 transmits and receives radio signals to at least one of a base station, an external terminal, and a server on a mobile communication network. 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 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. 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.

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 call mode or the photographing mode. The processed image frame can be displayed on the base portion 265 (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 key pad dome switch, a touch pad (static pressure / capacitance), 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 may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. Meanwhile, the sensing unit 140 may include a proximity sensor 141.

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 each other, or may be disposed on different surfaces.

When the display unit 151 and a sensor for detecting a touch operation (hereinafter, referred to as a touch sensor) form a mutual layer structure (hereinafter referred to as a touch screen), the display unit 151 may be configured in addition to an output device. Can also be used as an input device. The touch sensor may have the form of, for example, a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in a pressure applied to a specific portion of the display unit 151 or a capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor 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, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

Referring to FIG. 1, a proximity sensor 141 may be disposed in an inner region of the mobile terminal or in the vicinity of the touch screen, which is surrounded 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 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. 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 allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the pointer is proximately touched on the touch screen means a position where the pointer is vertically corresponding 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. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152 so that they may be classified as a part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 154. 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 be used for stimulation such as a pin array vertically moving with respect to the contact skin surface, a jetting force or suction force of air through an injection or inlet, grazing to the skin surface, contact of an electrode, and electrostatic force. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

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. The haptic module 154 may include two or more haptic modules 154 according to the configuration of the portable terminal 100.

The memory 160 may store a program for the operation of the controller 180 and temporarily store input / output data (e.g., a phone book, a message, a still image, a moving picture, etc.). The memory 160 may store data on vibration and sound of various patterns outputted when a 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 port for connecting a device with a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, an identification module, an audio I / 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 170 may be a path through which power from the cradle is supplied to the mobile terminal 100, or various commands A signal may be a path through which the signal is transmitted to the mobile 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 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 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 other functions. The described embodiments may be implemented by the controller 180 itself.

According to the software implementation, embodiments such as the procedures and functions described herein may be implemented as 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 according to an embodiment of the present invention, and FIG. 3 is a rear perspective view of the mobile terminal shown in FIG. 2. Referring to FIG.

2 and 3, the mobile terminal 200 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, and a swing type in which two or more bodies are coupled to be movable relative to each other. Further, the mobile terminal described herein may be any portable electronic device having a camera and flash, for example, a mobile phone, a smart phone, a notebook computer, a digital broadcast terminal, a Personal Digital Assistants ), A PMO (Portable Multimedia Player), and the like.

The terminal body includes a case (which may be referred to as a casing, a housing, a cover, and the like) that forms an appearance. The case may be coupled to the front case 201, the rear case 202 covering the surface opposite to the front case 201, and the rear case 202 to form a rear cover of the mobile terminal 200. 203). Various electronic components are embedded in the space formed between the front case 201 and the rear case 202. The cases may be formed by injecting synthetic resin or may be formed of a metal material, for example, a metal material such as stainless steel (STS) or titanium (Ti).

The front surface of the terminal body includes a display unit 210, a first sound output unit 211, a front camera unit 216, a side key 214, an interface unit 215, and a signal input unit 217.

The display unit 210 includes an LCD (Liquid Crystal Display) module, an OLED (Organic Light Emitting Diodes) module, and an e-paper for visually expressing information. The display unit 210 may include touch sensing means for inputting data by a touch method. Hereinafter, the display unit 210 including the touch sensing unit will be referred to as a 'touch screen'. If any one of the touches on the touch screen 210 is touched, the contents corresponding to the touched position are input. The content input by the touch method may be a letter or a number, an instruction in various modes, a menu item which can be designated, and the like. The touch sensing means is formed in a translucent manner so that the display portion can be seen, and a structure for enhancing the visibility of the touch screen in a bright place may be included. Referring to FIG. 2, the touch screen 210 occupies most of the front surface of the front case 201.

The first sound output unit 211 may be implemented as a receiver for delivering a call sound to a user's ear or a loud speaker for outputting various alarm sounds or multimedia playback sounds.

The front camera unit 216 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 can be displayed on the display unit 210. [

The image frame processed by the front camera 216 can be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. [ The front camera 216 may be provided in two or more depending on the use environment.

The signal input unit 217 is operated to receive a command for controlling the operation of the mobile terminal 200 and may include a plurality of input keys. The input keys may also be referred to as a manipulating portion and may be employed in any manner as long as the user has a tactile sense and operates in a tactile manner.

For example, a dome switch or touch screen capable of receiving a command or information by a push or touch operation of a user, a touch pad, or a wheel, a jog type or a joystick for rotating a key . The contents input by the signal input unit 217 can be variously set. For example, to enter start, end, scroll, and the like.

Side keys 214, an interface unit 215, a sound input unit 213, and the like are disposed on side surfaces of the front case 201.

The side key 214 may be collectively referred to as an operation unit, and a command for controlling the operation of the mobile terminal 200 may be input. The side key 214 may be employed in any manner as long as the user is operating in a tactile manner with a tactile impression. The content input by the side key 214 can be variously set. For example, by the side key 214, it is possible to control the image input units 216 and 221, adjust the size of the sound output from the sound output unit 211, or switch the display unit 210 to the touch recognition mode Command can be input.

The sound input unit 213 may be implemented, for example, in the form of a microphone to receive a user's voice, other sounds, and the like.

The interface unit 215 is a channel through which the mobile terminal 200 related to the present invention can exchange data with an external device. For example, the interface unit 215 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 the like, or power supply terminals for supplying power to the mobile terminal 200. The interface unit 215 may be implemented in the form of a socket for receiving an external card such as a subscriber identification module (SIM) or a user identity module (UIM), a memory card for storing information.

A power supply unit 240 and a rear camera unit 221 are disposed on the rear surface of the terminal body.

A flash 222 and a mirror (not shown) may be disposed adjacent to the rear camera unit 221. The flash illuminates the subject toward the subject when the subject is photographed by the rear camera unit 221.

The mirror allows the user to illuminate the user's own face or the like in the case where the user intends to photograph (self-photograph) himself / herself by using the rear camera unit 221. [

The rear camera unit 221 may have a photographing direction substantially opposite to that of the front camera unit 216 disposed on the front side and may be a camera having different pixels from the front camera unit 216. [

For example, the front camera unit 216 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 to the other party. The rear camera unit 221 photographs a general subject and immediately transmits It is preferable to have a high pixel. The front and rear camera units 216 and 221 may be installed in the terminal body in a rotatable or pop-up manner.

The battery 240 supplies power to the mobile terminal 200. The battery 240 may be built in the terminal body or may be directly detachable from the outside of the terminal body.

FIG. 4 is a perspective view of the battery case with the battery case removed in FIG. 3, and FIG. 5 is a partial cross-sectional view taken along the line IV-IV of FIG. 4.

As shown in FIGS. 4 and 5, the vibration motor 300 may be mounted to the terminal to excite the terminal. The vibration motor 300 has been conventionally used a rotary motor, but in the case of the rotary motor, since the rotation continues for a predetermined time even after the power is cut off, there is a problem that the vibration is continued, and it is difficult to miniaturize because a certain space for rotation is required. There is a point.

In addition, since the kinetic energy is dispersed in the rotational radial direction about the rotation axis, it is difficult to concentrate the kinetic energy in any one direction. For this reason, there are problems in that various factors, such as secondary vibration prevention, need to be considered for fixing and supporting the vibration motor 300.

Embodiment of the present invention relates to the linear vibration motor 300 is formed so that the moving part reciprocating in any one direction, it can overcome the disadvantages of the conventional rotary motor as described above.

4 and 5, the vibration motor 300 according to an embodiment of the present invention may be disposed in close proximity to the vibration-sensitive components such as the speaker 231 or the contact 233. The speaker 231 is formed such that the vibration plate therein vibrates in the thickness direction, and the contact 233 is electrically connected to another contact of the battery case in the thickness direction. In this case, if vibration in the thickness direction is applied to the speaker 231 and the contact 233, the original performance may not be exhibited.

Therefore, when the vibration motor 300 vibrating in the lateral direction rather than the longitudinal direction is used as in the present invention, the arrangement of the elements in the terminal can be more freely. That is, by using a motor vibrating in the lateral direction, it is possible to miniaturize the terminal and to optimally design components in the terminal.

Even when using the vibration motor 300 according to an embodiment of the present invention, it is preferable to be spaced apart from the image input unit 221 by a predetermined interval. In addition, at least one buffer member 223 may be provided between the image input unit 221 and the vibration motor 300 to prevent vibrations applied to the image input unit 221 during photographing.

FIG. 6 is a perspective view of a vibration motor according to the first embodiment of the present invention shown in FIG. 3, FIG. 7 is an exploded perspective view of FIG. 6, and FIG. 8 is a state cut along the line VV of FIG. 6. It is sectional drawing, and FIG. 9 is sectional drawing in the state cut along the line VI-VI of FIG.

6 to 8, the vibration motor 300 includes a housing 310, a coil 360, a moving part 320, and elastic members 351 and 352.

An inner space is formed in the housing 310 to accommodate the internal components. The housing 310 may be formed of a rectangular parallelepiped having an upper surface, a lower surface, and four side surfaces on an inner circumferential surface thereof. Alternatively, the housing 310 may be formed of a cube.

The long direction of the cuboid will be defined as the longitudinal direction D1 and the shorter direction as the width direction D2. The side surfaces facing each other in the longitudinal direction will be referred to as the first side S1 and the second side S2, and the sides facing each other in the width direction will be referred to as the second side S2 and the fourth side.

In addition, each corner portion of the housing 310 formed of a rectangular parallelepiped may be formed in a curved surface. By forming a curved surface at each end of the housing 310, it is possible to better support the load acting in the vertical direction.

The housing 310 may include a first cover 311 and a second cover 312.

The coil 360 is formed in the housing 310, which is formed in one of the first cover 311 and the second cover 312. The coil 360 is disposed on the inner side of the cover. The cover may have a seating groove 313 recessed in one surface, in which case the coil 360 is disposed in the seating groove 313. Therefore, the second cover 312 of the entire vibration motor 300 can be made thinner by the depth of the mounting groove 313.

In some cases, the coil 360 may be arranged in plurality so as to increase the electromagnetic force acting on the moving unit 320.

The moving part 320 may be formed to reciprocate between the first side S1 and the third side S3 facing each other among the four sides of the housing 310. The moving part 320 may be formed to have a certain mass, and may be formed such that the mass at both ends in the longitudinal direction is larger than the central part so as to increase the displacement in the reciprocating direction.

The moving part 320 may be integrally formed including the magnet 322 and the yoke 323. Alternatively, the yoke 323 may be fixed to a portion of the housing 310 and the moving part 320 may include only the magnet 322.

The moving part 320 may have a groove recessed inward and a magnet 322 may be mounted in the groove. In addition, the yoke 323 may be disposed to cover the groove. The magnet 322 and the yoke 323 may have a rectangular plate shape. Alternatively, the moving part may have a hole penetrating the upper and lower surfaces, and the magnet and the yoke may be disposed to cover the hole.

The magnet 322 is formed to generate magnetic flux and is formed in the central portion of the moving part 320. The magnets 322 may be formed in one or a plurality, and in the case of a plurality of magnets 322, the magnets 322 may be disposed to be spaced apart from each other by a predetermined interval.

The magnet 322 and the coil 360 are arranged to generate an electromagnetic force for reciprocating the moving part 320 in the direction in which the first and third sides S3 are extended.

The yoke 323 is disposed to face the magnet 322 to focus the magnetic flux of the magnet 322. The yoke 323 may be formed to have a wider cross section than the magnet 322 to facilitate the magnetic flux focusing of the magnet 322.

When an external power source is applied to the coil 360, the direction of the current flowing through the coil 360 is changed. At this time, since the direction of the current is changed, the moving unit 320 reciprocates.

In this case, although AC power may be used, DC power may be used. When a DC power source is used, the moving unit 320 may be reciprocated by using the supply and blocking of the DC power source and the elastic force and the restoring force of the spring. In this case, the coil 360 may be disposed on one side of the housing 310. That is, the coil 360 may be disposed on one side of one surface of the inner side of the first cover 311 or the second cover 312.

Elastic members 351 and 352 are disposed at both ends of the moving part 320. In more detail, the first side S1 and the moving part 320 of the housing 310 may be disposed between the third side and the moving part 320, respectively.

The elastic members 351 and 352 may be coil springs, torsion springs, or leaf springs. In this embodiment, coil springs are used.

As shown, the elastic members 351 and 352 are disposed at both ends of the moving part 320, respectively, but differently between the first side S1 and the moving part 320, and between the third side S3 and the third side S3. A plurality of moving parts 320 may be formed respectively. Such an arrangement may increase the elastic force and the restoring force with respect to the moving part 320, and prevent the eccentric movement of the moving part 320.

In addition, the elastic modulus of the elastic members 351 and 352 may be formed differently. For example, by moving the elastic modulus of the elastic members 352 formed on the third side S3 to be larger than the elastic modulus of the elastic members 351 formed on the first side S1, the moving part during vibration. The displacement of the 320 can be made larger.

The housing 310 may include an insertion groove 315 to insert the elastic members. In addition, the moving part 320 may include an insertion groove 325 to insert the elastic members. In this way, since the spring is not fixed to the housing or the elastic member by welding or screw, the possibility of disconnection or deformation of the elastic member is reduced. This improves the durability of the part.

As shown in FIG. 8, the reciprocating moving part 320 and the housing 310 are spaced apart from each other to have a predetermined gap in the thickness direction. Due to this gap, secondary vibration may occur in the thickness direction D3 of the vibration motor 300 (see FIG. 6). In addition, in order to prevent secondary vibration, when the moving part 320 and the housing 310 closely contact each other, vibration may be reduced due to frictional force. Hereinafter, a structure for preventing the secondary vibration will be described with reference to the drawings.

6 and 7, roller members 340 are formed at both ends of the moving part 320 facing the first side S1 and the third side S3 of the housing 310. The roller member 340 has a cylindrical body 341 and an axial coupling portion 342 protruding from both ends of the body. The cylindrical body 341 is formed to be in rolling contact with the first cover and the second cover, respectively. The diameter of the cylindrical body 341 is larger than the thickness of the moving part 320.

As a result, when the moving part 320 reciprocates in the housing 310, the roller member 340 makes a rolling contact with the upper and lower surfaces of the housing 310, respectively, and in the housing 310 of the moving part 320. Guided movement in.

The shaft coupling parts 342 are respectively coupled to the moving parts 320 so as to rotate relative to the housing 310. The moving part 320 is formed with a groove so that the shaft coupling part 342 can be inserted.

As such, since the vibration motor 300 includes the roller member 340, vibration in the thickness direction of the moving part 320 can be prevented in the internal space of the housing 310.

Although not shown, groove portions recessed from one surface of the first cover 311 and the second cover 312 to which the roller member 340 contacts may be formed. In addition, the groove portion may be surface-treated to reduce the frictional force with the roller member 340. As an example of the surface treatment, an oil layer may be formed on one surface of the groove portion.

10 is a sectional view of a vibration motor according to a second embodiment of the present invention, and FIG. 11 is a perspective view of the movable body shown in FIG.

As described above, the moving part 420 and the housing 410 are spaced apart from each other to have a predetermined gap, which may cause secondary vibration in the thickness direction of the vibration motor 400.

In order to prevent vibration in the thickness direction, the moving part 420 may include a roller member 440. The roller member 440 may be formed on the top and bottom surfaces of the moving part 420 facing the inner surface of the first cover 411 and the second cover 412, respectively.

The roller member 440 has a ball shape and is inserted into the moving part 420. The moving part 420 has a groove for inserting the roller member 440 and forms an opening surface smaller than the diameter of the roller member 440. In addition, a spring may be disposed between the roller member 440 and the moving part 420 to elastically support the roller member 440.

Only one side of the roller member 440 contacts the housing 410, and the other side may be spaced apart from the inner surface of the groove of the moving part 420 by a predetermined interval. On the contrary, one side of the roller member 440 may be formed in rolling contact with the housing 410, and the other side may be formed in rolling contact with the groove of the moving part 420.

The roller member 440 is preferably formed to have a small diameter so as to minimize the portion in contact with the housing 410 to reduce the frictional force.

As such, since the vibration motor 400 includes the roller member 440, vibration in the thickness direction of the moving part 420 in the inner space of the housing 410 can be prevented.

In the second embodiment, the rest of the configuration except for the moving member 420 to which the roller member 440 and the roller member 440 are coupled is the same as or similar to the first embodiment, and a description thereof will be omitted.

12 is a sectional view of a vibration motor according to a third embodiment of the present invention, and FIG. 13 is a perspective view of the second lid shown in FIG. 12.

As described above, the moving part 520 and the housing 510 are spaced apart from each other to have a predetermined gap, which may cause secondary vibration in the thickness direction of the vibration motor 500.

In order to prevent vibration in the thickness direction, the housing 510 may include a roller member 514. The roller member 514 may be formed on one inner surface of the first cover 511 and the second cover 512, respectively.

The roller member 514 may be formed in a plurality of spaced apart from each other on the first cover 511 and the second cover 512, respectively. In order to support the moving part 520 even at the maximum displacement during the reciprocating movement of the moving part 520, the roller member 514 is disposed close to both side ends of the first cover 511 and the second cover 512, respectively. Can be.

The roller member 514 has a cylindrical body and an axial coupling that projects from both ends of the body. The shaft engaging portions of the roller member 514 are respectively rotatably coupled with respect to the housing 510. The shaft coupling portion is coupled to the second side and the fourth side of the housing 510. Grooves are formed in the second and fourth sides of the housing 510 so that the shaft coupling portion can be inserted therein.

One side of the roller member 514 may be formed in rolling contact with the moving part 520, and the other side may be in rolling contact with the housing 510. Unlike this, only one side of the roller member 514 may be in rolling contact with the moving part 520, and the other side may be spaced apart from the housing 510 at a predetermined interval.

The diameter of the roller member 514 is preferably to have a diameter as small as possible to reduce the frictional force by minimizing the portion in contact with the moving portion 520.

As such, since the vibration motor 500 includes the roller member 514, vibration in the thickness direction of the moving part 520 in the inner space of the housing 510 can be prevented.

In the third embodiment, the rest of the configuration except for the housing 510 to which the roller member 514 and the roller member 514 are coupled is the same as or similar to the first embodiment, and a description thereof will be omitted.

As described in the first to third embodiments, the rollers can be formed on the moving parts or the housings, respectively, so that the moving parts can be guided, and vibrations in directions other than the moving directions can be reduced or prevented.

In addition, since the vibration in the thickness direction can be minimized, the gap in the thickness direction required in the design can be reduced in order to prevent wear of the moving part and the housing in contact with each other. That is, since the gap in the thickness direction between the moving part and the housing can be reduced, a slimmer vibration motor and a mobile terminal can be provided.

The mobile terminal described above can be applied to not only the configuration and method of the embodiments described above but also all or some of the embodiments may be selectively combined so that various modifications may be made to the embodiments It is possible.

Claims (18)

A housing formed such that an inner circumferential surface excluding the upper and lower surfaces includes first to fourth sides;
A coil formed in the housing;
A moving part formed to reciprocate between the first side and the third side facing each other;
An elastic member formed between the moving part and the housing; And
Vibration motor including a roller member which is formed to make a rolling contact with the upper or lower surface of the housing. The method of claim 1,
And the roller member is coupled to the housing. The method of claim 1,
And the roller member is coupled to the moving part. The method of claim 1,
And the elastic member is formed between the moving part and the first side or between the moving part and the third side. 5. The method of claim 4,
The elastic member is formed in plural, and the elastic modulus of the elastic members formed on one side and the elastic members formed on the other side is different from each other. The method of claim 5,
The moving part or the housing has an insertion groove so that the elastic members are inserted. The method of claim 1,
The moving unit includes:
And a yoke formed to determine a magnet and a direction of the magnetic force of the magnet. The method of claim 1,
The housing includes a first cover and a second cover coupled to each other,
The first cover or the second cover is a vibration motor, characterized in that it has a seating recess recessed from one surface so that the coil can be seated. The method of claim 1,
The reciprocating direction of the moving unit is a vibration motor, characterized in that the direction extending the first side and the third side. A terminal body; And
A vibration motor coupled to the body to excite the body,
The vibration motor,
A housing having a first cover and a second cover coupled to each other to define an internal space;
A coil formed in the housing;
A moving part configured to reciprocate between a first side and a third side facing each other in the internal space according to a change in an electromagnetic field induced by the coil; And
And a roller member formed to be in rolling contact with the first cover or the second cover of the housing. The method of claim 10,
The roller member is coupled to the housing. The method of claim 10,
The roller member is coupled to the moving unit. The method of claim 10,
And the elastic member is formed between the moving part and the first side or between the moving part and the third side. The method of claim 13,
The elastic member is formed in plural, and the elastic modulus of the elastic members formed on one side and the elastic members formed on the other side is different from each other. 15. The method of claim 14,
The mobile unit or the housing is provided with an insertion groove so that the elastic member is inserted. The method of claim 10,
The moving unit includes:
And a yoke formed to determine a magnet and a direction of the magnetic force of the magnet. The method of claim 10,
The first cover or the second cover is a mobile terminal, characterized in that it comprises a seating recess recessed from one surface so that the coil is seated. The method of claim 10,
The reciprocating direction of the moving unit is a mobile terminal, characterized in that the direction extending the first side and the third side.

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