KR20130089479A - Connecting system between mobile terminal and connecting device - Google Patents

Abstract

PURPOSE: A connecting system between a connection apparatus and a mobile terminal is provided to make an outer tube of the mobile terminal simple by inserting a second terminal part of the connection apparatus into a recess part of the mobile terminal and elastically contacting a first terminal part of the mobile terminal to the second terminal part. CONSTITUTION: A recess part (171) of a mobile terminal (100) is recessed on one surface of a case as a predetermined depth. A first terminal part (172) of the mobile terminal forms one or more surfaces of the recess part and is electrically connected to a circuit board (180). A second terminal part (222) of a connection apparatus (200) is inserted into the recess part and is elastically contacted to the first terminal part. An elastic part (223) of the connection apparatus provides elastic force to the second terminal part so that the second terminal part elastically pressurizes the first terminal part.

Description

CONNECTING SYSTEM BETWEEN MOBILE TERMINAL AND CONNECTING DEVICE}

The present invention relates to a connecting system between a mobile terminal and a connection device that connects a mobile terminal and an external device to transmit and receive data or supplies power to a battery of the mobile terminal.

A mobile terminal is a portable electronic device that is portable and has one or more functions of voice and video call function, information input / output function, and data storage function.

As the functions are diversified, the mobile terminal is implemented in the form of a multimedia player having complex functions such as taking a picture or a video, playing a music or a video file, playing a game, and receiving a broadcast.

Various new attempts have been made in terms of hardware or software to implement the complex functions of multimedia devices. For example, a system for connecting a mobile terminal to a high definition television (HDTV) and reproducing HD video, digital audio, and the like through an HDTV has been proposed.

In order to implement the system, a connection device for connecting a mobile terminal and an external device is required. In general, a mobile terminal is provided with an interface unit (eg, an I / O port) that is a connection structure with a connection device. The interface part has a structure in which a hole is formed in the terminal body, and the connection pins protrude in the hole, and the male and female connection pins are connected to the connection pins of the connection device.

According to the above structure, it is difficult to realize a simple appearance because holes and connecting pins are formed in the exterior of the terminal body, and there is a high possibility of poor contact due to the infiltration of foreign objects, and reliability may be degraded due to breakage or poor contact of the connecting pins. have. In addition, when the antenna is disposed together on the top / bottom of the terminal body, it is difficult to secure the volume space of the antenna.

The present invention is to propose a connecting system between a mobile terminal and a connecting device having a simpler coupling structure and improved reliability while maintaining a simple appearance of the mobile terminal.

In order to achieve the above object of the present invention, the connecting system between the mobile terminal and the connection device according to an embodiment of the present invention is a mobile terminal formed to transmit or receive data and having a battery, and the mobile terminal and the external A connection device configured to connect devices to transmit or receive data or to supply power to the battery, wherein the mobile terminal includes a recess formed to be recessed by a predetermined depth on one surface of the case; A first terminal portion having at least one surface and electrically connected to the circuit board, wherein the connection device includes a second terminal portion inserted into the recess portion and elastically contacted with the first terminal portion, and the second terminal portion being An elastic portion for providing an elastic force to the second terminal portion to elastically press the first terminal portion .

According to an example related to the present invention, a side surface of the recess portion is formed to be inclined with respect to a bottom surface, and the second terminal portion is formed with an inclined portion having a gradient to correspond to the side surface of the recess portion.

According to another example related to the present invention, the first terminal portion forms a bottom surface of the recess portion.

The case is formed of a conductive metal material and includes a first case having a through hole corresponding to the recess, and the through hole is formed in the first terminal part together with the first terminal part to form the recess part and formed of synthetic resin. It may include a second case for electrically separating the first terminal portion and the first case.

According to another example related to the present invention, the external device includes a primary coil for generating an electromagnetic field, and the connection device is electrically connected to the second terminal part and uses the induced current generated from the primary coil. It further comprises a secondary coil configured to charge the battery.

According to another example related to the present invention, the mobile terminal is provided with a first fixing part disposed adjacent to the first terminal portion and maintaining the second terminal portion in elastic contact with the first terminal portion, and the connection device The second fixing part is disposed corresponding to the first fixing part and is coupled to the first fixing part.

At least one of the first and second fixing parts may be provided with a magnetic material to couple the first fixing part and the second fixing part to each other by a magnetic force. In this case, the first and second fixing parts may be formed so as not to be exposed to the outside to implement a simple appearance.

In addition, the first fixing part may be formed to be recessed by a predetermined depth in the case, and the second fixing part may be inserted into and caught by the first fixing part.

In addition, the first fixing part includes magnets disposed on both sides of the first terminal part and having different electrodes, and the second fixing part uses different electrodes so that the attraction force only works with the corresponding first fixing part. It can be provided with a magnet. In addition, the first terminal unit may include a plurality of first terminals arranged along one direction, and the first fixing unit may include a plurality of first terminals and extend along the one direction with the plurality of first terminals interposed therebetween. .

According to the present invention having the above configuration, the mobile terminal is provided with a recess portion recessed by a predetermined depth smaller than the size of the existing hole and the first terminal portion forming at least one surface of the recess portion, the second terminal portion of the connection device Is inserted into the recess portion is made to be in elastic contact with the first terminal portion, the appearance of the mobile terminal can be more simple, the ingress of foreign matter can be prevented, as a result of the problem of reliability deterioration such as poor contact can be improved Can be.

In addition, the volume structure of the antenna can be secured due to the more simplified structure of the recess portion and the first terminal portion and increased freedom of the installation position. In addition, the coupling force between the mobile terminal and the connecting device may be supplemented through the first and second fixing parts, and the connecting device may be safely separated from the mobile terminal even when an unexpected external force is applied.

1 is a perspective view showing a connecting system according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the rear of the mobile terminal shown in FIG.
3 is a cross-sectional view illustrating an example of a connection structure between a first terminal portion and a second terminal portion shown in FIG. 1.
4 is a conceptual diagram illustrating an example in which a battery is charged through the connection structure of FIG. 3.
5A to 5C are conceptual views illustrating a fixing structure between the first terminal portion and the second terminal portion shown in FIG.
6 is a cross-sectional view showing another example of a connection structure between the mobile terminal and the connection device of FIG.

Hereinafter, a connecting system between a mobile terminal and a connection device 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. In addition, the suffix "module" and " part "for constituent elements used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

1 is a perspective view showing a connecting system 10 according to an embodiment of the present invention.

Referring to FIG. 1, the connecting system 10 connects the mobile terminal 100 and the mobile terminal 100 to the external device 300 to transmit / receive data or to the battery 190 of the mobile terminal 100 (FIG. 2). Connector for supplying power).

The mobile terminal 100 is a portable electronic device that is portable and has one or more functions such as voice and video call functions, input / output information, and data storage function, and includes a battery 190 for power supply. Equipped. The mobile terminal 100 may include an HDMI (High Definition Multimedia Interface) output function for simultaneously transmitting digital video and audio signals through a single cable. The detailed configuration of the mobile terminal 100 will be described later.

The external device 300 may be various electronic devices including a terminal, for example, a mobile phone, a computer, a TV, a charging device, and the like. In this figure, the mobile terminal 100 is connected to a smart TV, which is an external device 300, and the image captured by the mobile terminal 100 is output through the smart TV.

The connection device 200 is used to connect the mobile terminal 100 to the external device 300. The connection device 200 is a medium for connecting different interfaces or standards, and may be understood as a connector, an adapter, and a gender.

The connection device 200 may include a connector unit 210 connected to the external device 300 (eg, an HDMI connector connected to a smart TV) and a connector unit 220 connected to the mobile terminal 100. MHL (Mobile High-Definition Link) connector is connected to the terminal 100]. These connector parts 210 and 220 may have various shapes, sizes, etc. in the characteristics for connecting different interfaces or standards.

In addition, the connector parts 210 and 220 may be connected through a cable 230 to secure a connection distance between the mobile terminal 100 and the external device 300.

Hereinafter, the detailed configuration of the mobile terminal 100 will be described in more detail.

The mobile terminal 100 described herein includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), and a portable multimedia player (PMP). ), E-books, navigation, and the like.

However, it will be easily understood by those skilled in the art that the configuration according to the embodiment described herein may be applied to a fixed terminal such as a digital TV, a desktop computer, and the like, except when applicable only to the mobile terminal 100 .

1 illustrates a front surface of a mobile terminal 100 according to an embodiment of the present invention.

Referring to FIG. 1, the mobile terminal 100 includes a bar-shaped terminal body. However, the present invention is not limited thereto, and can be applied to various structures such as a slide type, a folder type, a swing type, and a swivel type in which two or more bodies are relatively movably coupled.

The terminal body includes a case (which may be called a casing, a housing, a cover, etc.) forming an external appearance. The case may be divided into a front case 101 and a rear case 102 covering a face opposite to the front case 101. At least one intermediate case may be additionally disposed between the front case 101 and the rear case 102, and the battery cover 103 covering the battery 190 may be detachably attached to the rear case 102. have.

Various electronic components are embedded in the space formed between the front case 101 and the rear case 102. [ The cases may be formed by injection molding of a synthetic resin or may be formed of a metal such as stainless steel (STS), titanium (Ti), aluminum (Al), or the like.

A display unit 151, a first sound output unit 152, a first camera unit 121, a signal input unit 130, and the like are formed on the front surface of the terminal body, and the sound input unit 122 and the interface unit 170 are provided on the side surface thereof. ) May be disposed.

The display unit 151 includes a liquid crystal display (LCD) module, an organic light emitting diodes (OLED) module, an e-paper, and the like that visually express information.

The display unit 151 may include a touch sensor to be input by a touch method. If there is a touch on any part of the display unit 151 through the touch sensor, 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 sensor is formed to be translucent so that the display unit 151 can be seen, and may include a structure for increasing the visibility of the touch screen in a bright place. According to FIG. 1, the display unit 151 occupies most of the front surface of the front case 102.

The first sound output unit 152 and the first camera unit 121 are disposed in regions adjacent to one end of both ends of the display unit 151, and the signal input unit 131 and the sound input unit 122 are disposed in the region adjacent to the other end. ) Is placed. The signal input unit 132 and the interface unit 170 may be disposed on the side of the terminal body.

The first sound output unit 152 may be implemented in the form of a receiver for transmitting a call sound to a user's ear or a loud speaker for outputting various alarm sounds or reproduction sounds of multimedia. The sound generated from the first sound output unit 152 is emitted along the assembly gap between the front case 101 and the window, and the appearance of the mobile terminal 100 is more apparent since the holes formed independently for the sound output are not seen. It can be simple.

The first camera unit 121 processes an image frame such as a still image or 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 151. [

The signal 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 and 132. The operation units 131 and 132 may be collectively referred to as a manipulating portion and may be employed in any manner as long as the user operates in a tactile manner.

The contents input by the first and / or second operation units 131 and 132 may be variously set. For example, the first manipulation unit 131 receives a command such as start, end, scroll, etc., and the second manipulation unit 132 adjusts or displays the volume of sound output from the first sound output unit 152. A command such as switching to the touch recognition mode of 151 may be input.

The sound input unit 122 may be implemented in the form of a microphone, for example, to receive a user's voice, other sounds, and the like. The user's voice, other sounds, etc. may be made to flow along the assembly gap between the front case 101 and the window.

The interface unit 170 may be a path through which the mobile terminal 100 exchanges data with the external device 300 or receives power from the external device 300. For example, the interface unit 170 is a connection terminal for connecting with the earphone, a port for short-range communication (for example, an infrared port (IrDA Port), Bluetooth port (Bluetooth Port), wireless LAN port (Wireless LAN Port), etc. ], Or may be at least one of power supply terminals for supplying power to the mobile terminal 100.

2 is an exploded perspective view of the rear surface of the mobile terminal 100 shown in FIG. 1.

2, the second camera unit 121 ′ may be additionally mounted on the rear surface of the terminal body. The second camera unit 121 ′ may be a camera having a photographing direction substantially opposite to the first camera unit 121 (see FIG. 1) and having different pixels from the first camera unit 121.

For example, in the case of a video call, the first camera unit 121 has a low pixel so that it is easy to photograph the user's face and transmit it to the other party, and the second camera unit 121 'captures a general subject. It is desirable to have a high pixel because it is often not transmitted immediately. The first and second camera units 121 and 121 ′ may be rotatably installed or popped up in the terminal body.

The flash 123 and the mirror 124 may be further disposed adjacent to the second camera portion 121 ′. The flash 123 shines light toward the subject when the subject is photographed by the second camera unit 121 ′. The mirror 124 allows the user to see his / her own face or the like when the user wants to photograph (self-photograph) the second camera unit 121 ′.

The second sound output unit 152 ′ may be further disposed on the rear surface of the terminal body. The second sound output unit 152 ′ may implement a stereo function together with the first sound output unit 152 (see FIG. 1), and may be used to implement a speakerphone mode during a call.

An antenna (not shown) for receiving a broadcast signal may be additionally disposed on the side surface of the terminal body in addition to an antenna for a call or the like. An antenna constituting a part of the broadcast receiving module can be installed to be drawable from the terminal body.

The terminal body is equipped with a battery 190 for supplying power to the mobile terminal 100. The battery 190 may be built in the terminal body or detachably mounted to the terminal body.

Another interface unit 170 ′ may be provided on an upper surface of the rear case 102 that is exposed when the battery cover 103 is separated. The interface unit 170 'has a structure similar to or similar to that of the interface unit 170 disposed on the side surface of the terminal body.

Hereinafter, a connection system between the mobile terminal 100 and the connection device 200 having a simpler coupling structure and improved reliability while maintaining a simple appearance of the mobile terminal 100 will be described in more detail.

3 is a cross-sectional view illustrating an example of a connection structure between the first terminal portion 172 and the second terminal portion 222 illustrated in FIG. 1.

Referring to FIG. 3 together with FIGS. 1 and 2, the mobile terminal 100 and the connection device 200 are provided with a connection structure for connecting them. The mobile terminal 100 is provided with an interface unit 170, and the connection device 200 is provided with a connector unit 220 that can be connected to the interface unit 170.

The interface unit 170 may be disposed on the side of the terminal body to be exposed to the outside, or may be selectively covered by a structure such as the battery cover 103. In addition, the interface unit 170 may be provided at a plurality of locations, respectively.

The interface unit 170 of the mobile terminal 100 includes a recess 171 and a first terminal unit 172.

The recess 171 is formed to be recessed by a predetermined depth on one surface of the front case 101 or the rear case 102 to form a space in which the second terminal portion 222 of the connection device 200 can be accommodated. . The recess 171 is preferably smaller in size and lower in depth than the hole formed in the existing interface.

The recess 171 may have a shape of a circular groove such that the second terminal portion 222 may be inserted in an arbitrary direction. The side of the recess portion 171 is formed to be inclined with respect to the bottom surface to guide the insertion of the second terminal portion 222 and to prevent lateral flow of the second terminal portion 222 inserted into the recess portion 171. Can be.

The first terminal unit 172 forms at least one surface of the recess 171. For example, the first terminal portion 172 may form a bottom surface of the recess 171 or form a side surface of the recess 171 as illustrated. The first terminal unit 172 is connected to the circuit board 180 and is in electrical contact with the second terminal unit 222 to transmit or receive data or to supply power to the battery 190.

The recess 171 and the first terminal unit 172 may be provided in plural numbers so that each of the first terminal units 172 plays a different role. For example, any one first terminal unit 172 may be configured to transmit or receive data, and the other first terminal unit 172 may be configured to supply power to the battery 190.

The first terminal unit 172 may be electrically connected to the circuit board 180, and the circuit board 180 may be supported by the support member 181. The support member 181 may be a rigid member having a certain level or more of strength, such as stainless steel (SUS).

The connector part 220 of the connection device 200 includes a second terminal part 222 and an elastic part 223. The configuration of the second terminal portion 222 and the elastic portion 223 may be understood as a pogo pin and a spring pin inserted into the recess 171 and elastically contacting the first terminal portion 172.

The second terminal part 222 is formed to protrude from the body 221 of the connector part 220, and is inserted into the recess part 171 to be in elastic contact with the first terminal part 172. An inclined portion 222a having a gradient may be formed in the second terminal portion 222 to correspond to the inclined side surface of the recess portion 171.

The elastic part 223 provides elastic force to the second terminal part 222 so that the second terminal part 222 elastically presses the first terminal part 172. As the elastic part 223, a spring, an elastic rubber, a sponge, or the like may be used. In this figure, the elastic spring 223 in the form of a coil spring is inserted into the body 221 to press the second terminal portion 222.

4 is a conceptual diagram illustrating an example in which the battery 190 is charged through the connection structure of FIG. 3.

Referring to FIG. 4, the external device 300 may be configured as a charger for supplying power to the battery 190 of the mobile terminal 100 together with the connection device 200. As described above, the external device 300 may be mechanically connected to the connection device 200 through the connector parts 210 and 220, and may be wirelessly connected as shown.

For example, when the battery 190 of the mobile terminal 100 is charged through a wireless connection between the external device 300 and the connection device 200, the external device 300 is mounted on the mobile terminal 100. The mounting unit 310 may be provided, and the mounting unit 310 may include a primary coil 320 for generating an electromagnetic field. The primary coil 320 may be formed in various shapes such as a rectangle and a circle.

The connection device 200 is mounted on the mobile terminal 100, and the first terminal unit 172 and the second terminal unit 222 are electrically connected by mounting. The connection device 200 may be configured as a battery cover 103 covering the battery 190 or a case covering at least a part of the terminal body. The connection device 200 includes a secondary coil 240 electrically connected to the second terminal unit 222 and configured to charge the battery 190 by using an induction current generated from the primary coil 320. That is, the secondary coil 240 may be understood as one configuration of the wireless power receiver 250 using the induced current.

5A through 5C are conceptual views illustrating a fixing structure between the first terminal portion 172 and the second terminal portion 222 illustrated in FIG. 3. In the following description of the fixing structure of the present invention, the same or similar reference numerals are given to the same or similar structures, and the description thereof is replaced with the first description.

The mobile terminal 100 and the connection device 200 are provided with a first fixing part 174 and a second fixing part 224, respectively. The first fixing part 174 is disposed adjacent to the first terminal part 172, and is configured to maintain the second terminal part 222 in elastic contact with the first terminal part 172. The second fixing part 224 is disposed to correspond to the first fixing part 174 and is combined with the first fixing part 174.

5A and 5B, at least one of the first and second fixing parts 174 and 224 includes a magnetic material to couple the first fixing part 174 and the second fixing part 224 to each other by a magnetic force. Is made. For example, the first fixing part 174 may be formed of a magnet, and the second fixing part 224 may be made of metal.

As shown in FIG. 5A, the first fixing parts 174a and 174b and the second fixing parts 224a and 224b are provided in plural numbers, respectively, to be disposed on both sides of the first and second terminal parts 174 and 222, respectively. Can be. Alternatively, as shown in FIG. 5B, a plurality of first terminal parts 172 'are arranged along one direction, and a plurality of first fixing parts 174a' and 174b 'are provided to provide the plurality of first terminal parts. It may be formed to extend in the one direction with the (172 ') therebetween.

When the first and / or second fixing parts 174 and 224 are formed of magnets, the first and / or second fixing parts 174 and 224 may be formed inside the case so as not to be exposed to the outside. have. Alternatively, the rear case 102 of the mobile terminal 100 may be made of metal to form a first fixing portion 174, and the second fixing portion 224 may be made of a magnet to be coupled to the rear case 102. have.

When a plurality of first terminal portions 172 and a first fixing portion 174 are provided, the first fixing portion 174 may be configured to work only in a relationship with a corresponding second fixing portion 224. That is, the first fixing portions 174a and 174b of the N pole and the S pole are provided at both sides of the first terminal portion 172, and the second pole of the S pole is positioned at the position corresponding to the first fixing portion 174a of the N pole. The fixing part 224a may be disposed, and the second fixing part 224b of the N pole may be disposed at a position corresponding to the first fixing part 174b of the S pole.

According to this, since the first and second fixing parts 174 and 224 can always be coupled only in pairs, it is possible to prevent the first and second terminal portions 172 and 222 from being connected in the up and down or left and right opposite directions. Can be.

Alternatively, when the first terminal portion 172 and the second terminal portion 222 are connected in the opposite direction instead of the predetermined direction for pairing, the switch may be configured to change the direction in a circuit.

The first and second fixing parts 174 and 224 may be configured to couple the mobile terminal 100 and the connecting device 200 through mechanical interference.

Referring to FIG. 5C, the first fixing part 175 includes a receiving groove 175a and a locking groove 175b. The accommodation groove 175a is disposed adjacent to the first terminal portion 172 and is formed to be recessed by a predetermined depth in the rear case 102. A locking groove 175b may be formed inside the accommodation groove 175a. The second fixing part 260 includes a protrusion 261 and a hook hook 262. The protrusion 261 is formed to protrude from the body 221 and is inserted into the accommodation groove 175a. The locking hook 262 is accommodated in the locking groove 175b to fix the second fixing part 260 to the first fixing part 175.

The second fixing part 260 may be formed to protrude from the body 221, and may include an operation unit 263 configured to release a locking of the locking groove 175b of the locking hook 262 by an operation.

6 is a cross-sectional view illustrating another example of a connection structure between the mobile terminal 100 and the connection device 200 of FIG. 1. Hereinafter, in the description of the connection structure of the present invention described, the same or similar reference numerals are given to the same or similar structures as the connection structures described above, and the description is replaced with the first description.

In the above embodiment, when the rear case 102 is formed of a synthetic resin, a connection structure between the mobile terminal 100 and the connection device 200 has been described. However, when most of the rear case 402 is formed of metal as shown in FIG. 6, it has a slightly different connection structure from the previous embodiment.

Specifically, the rear case 402 is divided into first and second cases 402a and 402b.

The first case 402a is formed of a conductive metal material and has a through hole corresponding to the recess 471. The second case 402b is inserted into the through hole to form a lease detail portion 471 together with the first terminal portion 172, and is formed of synthetic resin to electrically separate the first terminal portion 472 from the first case 402a. Let's do it.

The second case 402b may form a side surface of the recess 471, and the first terminal 472 may form a bottom surface of the recess 471. The support member 481 may be firmly coupled to the first case 402a through the fastening member 482.

According to the present invention having the above configuration, the mobile terminal is provided with a recess portion recessed by a predetermined depth smaller than the size of the existing hole and the first terminal portion forming at least one surface of the recess portion, the second terminal portion of the connection device Is inserted into the recess portion is made to be in elastic contact with the first terminal portion, the appearance of the mobile terminal can be more simple, the ingress of foreign matter can be prevented, as a result of the problem of reliability deterioration such as poor contact can be improved Can be.

In addition, the volume structure of the antenna can be secured due to the more simplified structure of the recess portion and the first terminal portion and increased freedom of the installation position. In addition, the coupling force between the mobile terminal and the connecting device may be supplemented through the first and second fixing parts, and the connecting device may be safely separated from the mobile terminal even when an unexpected external force is applied.

The connecting system between the mobile terminal and the connection device described above is not limited to the configuration and method of the embodiments described above, but the embodiments are configured by selectively combining all or part of the embodiments so that various modifications can be made. May be

Claims (11)

A mobile terminal configured to transmit or receive data and having a battery; And
And a connection device configured to connect the mobile terminal and an external device to transmit or receive data or to supply power to the battery.
The mobile terminal includes:
A recess formed in one surface of the case to be recessed by a predetermined depth; And
Forming at least one surface of the recess and having a first terminal portion electrically connected to the circuit board,
The connecting device,
A second terminal portion inserted into the recess and elastically contacting the first terminal portion; And
And a resilient portion providing elastic force to the second terminal so that the second terminal resiliently presses the first terminal. The method of claim 1,
The side of the recess is inclined with respect to the bottom surface,
And the inclined portion having a gradient to correspond to the side surface of the recess portion in the second terminal portion. The method of claim 1,
And the first terminal portion forms a bottom surface of the recess portion. The method of claim 3,
In this case,
A first case formed of a conductive metal material and having a through hole corresponding to the recess; And
And a second case inserted into the through hole to form the recess, and formed of synthetic resin to electrically separate the first terminal from the first case. 2. The method of claim 1,
The external device has a primary coil for generating an electromagnetic field,
The connecting device further comprises a secondary coil electrically connected to the second terminal unit and configured to charge the battery using the induced current generated in the primary coil. The method of claim 1,
The mobile terminal is provided with a first fixing part disposed adjacent to the first terminal portion and maintaining the second terminal portion in elastic contact with the first terminal portion.
The connecting device has a second fixing part disposed in correspondence with the first fixing part and coupled to the first fixing part. The method according to claim 6,
And at least one of the first and second fixing parts comprises a magnetic material to couple the first fixing part and the second fixing part to each other by a magnetic force. 8. The method of claim 7,
And the first and second fixing parts are formed so as not to be exposed to the outside. The method according to claim 6,
The first fixing part is formed to be recessed by a predetermined depth in the case,
And the second fixing part is inserted into and caught by the first fixing part. The method according to claim 6,
The first fixing part includes magnets disposed on both sides of the first terminal part and having different electrodes from each other,
The second fixing part has a connecting system between the mobile terminal and the connecting device, characterized in that the magnet having a different electrode so that the attraction force only between the corresponding first fixing part. The method according to claim 6,
The first terminal portion includes a plurality of first terminals arranged along one direction,
The first fixing part is provided with a plurality of connecting systems between the mobile terminal and the connecting device, characterized in that formed to extend in the one direction with the plurality of first terminals therebetween.

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