KR101980619B1 - Connecting system between mobile terminal and connecting device - Google Patents

Abstract

The present invention provides a mobile terminal that is formed to transmit or receive data and includes a battery and a connection device that connects the mobile terminal and an external device to transmit or receive data or supply power to the battery, The mobile terminal includes a recess portion formed to be recessed at a predetermined depth from one surface of the case, and a first terminal portion formed at least one surface of the recess portion and electrically connected to the circuit board, A second terminal portion inserted into the first terminal portion and elastically contacted with the first terminal portion and an elastic portion that provides an elastic force to the second terminal portion so that the second terminal portion elastically presses the first terminal portion, A connecting system between the two.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a connection system for a mobile terminal,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a connecting system between a mobile terminal and a connection device for connecting data between a mobile terminal and an external device and supplying power to the 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 as a multimedia player having complicated functions such as photographing, video shooting, playback of music or video file, game, broadcast reception, and the like.

Various new attempts have been made in terms of hardware or software to implement the complex functions of multimedia devices. For example, a system has been proposed in which a mobile terminal can be connected to an HDTV (High Definition TeleVision) to reproduce HD video, digital audio, and the like through an HDTV.

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

According to the above-described structure, it is difficult to realize a simple appearance due to the formation of holes and connection pins in the outer surface of the main body of the terminal, the possibility of contact failure due to the infiltration of foreign objects is high and the reliability of the connection pins may be deteriorated have. In addition, when antennas are disposed together at the upper and lower ends of the terminal body, it is difficult to secure the volume of the antenna.

Published Patent Application No. 10-2006-0085100 (2006.07.26.)

The present invention proposes a connecting system between a mobile terminal and a connection device having a simpler connection structure and improved reliability while maintaining a simple appearance of the mobile terminal.

According to an aspect of the present invention, there is provided a connecting system between a mobile terminal and a connection device, the mobile terminal including a battery and configured to transmit or receive data, And a connection device for connecting or connecting the devices to transmit or receive data or to supply power to the battery, wherein the mobile terminal comprises: a recess portion formed to be recessed by a predetermined depth from one surface of the case; And a first terminal portion formed at least on 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 an elastic portion for providing an elastic force to the second terminal portion so as to elastically press the first terminal portion .

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

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

The case includes a first case formed of a conductive metal material and having a through hole corresponding to the recess portion, and a second case formed of synthetic resin, which is inserted into the through hole and forms the recess portion together with the first terminal portion, And a second case electrically separating the first terminal and the first case from each other.

According to another embodiment of 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 portion, And a secondary coil configured to charge the battery.

According to another embodiment of the present invention, the mobile terminal is provided with a first fixing portion disposed adjacent to the first terminal portion and holding the second terminal portion in an elastic contact state with the first terminal portion, And a second fixing part disposed in correspondence with the first fixing part and coupled with the first fixing part.

At least one of the first and second fixing portions may include a magnetic body to couple the first fixing portion and the second fixing portion to each other by a magnetic force. At this time, the first and second fixing parts are not exposed to the outside, so that a simple appearance can be realized.

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

In addition, the first fixing portion may include magnets disposed on both sides of the first terminal portion and having different electrodes, and the second fixing portion may have different electrodes The magnet may be provided. The first terminal portion may include a plurality of first terminals arranged along one direction, and the first fixing portions may be provided in a plurality of the first terminals, and may extend along the one direction with the plurality of first terminals interposed therebetween .

According to the present invention having the above-described structure, the mobile terminal is provided with a recess portion recessed by a predetermined depth smaller than a size of a conventional hole, and a first terminal portion forming at least one surface of the recess portion, The external appearance of the mobile terminal can be made more simple, the foreign matter can be prevented from penetrating, and as a result, the problem of lower reliability such as contact failure can be improved .

Further, the volume space of the antenna can be ensured due to the simpler structure of the recess portion and the first terminal portion and the degree of freedom of the mounting position. In addition, the coupling force between the mobile terminal and the connection device can be complemented through the first and second fixing parts, and the connection device can be safely separated from the mobile terminal even if an unexpected external force is applied.

1 is a perspective view showing a connecting system according to an embodiment of the present invention;
FIG. 2 is an exploded perspective view of the rear surface of the mobile terminal shown in FIG. 1; FIG.
3 is a sectional view showing an example of the connection structure between the first terminal portion and the second terminal portion shown in FIG.
FIG. 4 is a conceptual view showing an example in which the battery is charged through the connection structure of FIG. 3. FIG.
5A to 5C are conceptual views showing 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 the 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 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, a connecting system 10 connects and disconnects data between a mobile terminal 100 and the mobile terminal 100 and an external device 300, or transmits data between the mobile terminal 100 and a battery 190 (Refer to FIG. 1).

The mobile terminal 100 is a portable electronic device having at least one of a voice and video communication function, a function of inputting / outputting information, and a function of storing data, which is portable, and includes a battery 190 for supplying power Respectively. The mobile terminal 100 may have 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 images photographed from the mobile terminal 100 are output through a smart TV.

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

The connection device 200 includes a connector 210 connected to the external device 300 such as an HDMI connector connected to a smart TV and a connector 220 connected to the mobile terminal 100. For example, (Mobile High-Definition Link) connector connected to the terminal 100). The connector units 210 and 220 may have various shapes and sizes in order to connect different interfaces or standards.

The connector units 210 and 220 are connected to each other through a cable 230 so that a connection distance between the mobile terminal 100 and the external device 300 can be secured.

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

The mobile terminal 100 described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a PMP ), An e-book, a 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 shows a front view 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 referred to as a casing, a housing, a cover, and the like) that forms an 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. A 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 first audio output unit 152, a first camera unit 121 and a signal input unit 130 are formed on a front surface of the terminal body and an acoustic input unit 122 and an interface unit 170 ) May be disposed.

The display unit 151 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 151 may include a touch sensor for inputting data by a touch method. If any one of the touches on the display unit 151 is touched through the touch sensor, contents corresponding to the touched position are input. The content input by the touch method may be a character or a number, an instruction in various modes, or a menu item that can be designated.

The touch sensor is formed to be transmissive so that the display unit 151 can be seen, and a structure for enhancing the visibility of the touch screen in a bright place may be included. Referring 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 the vicinity of one end of the display unit 151 and the signal input unit 131 and the sound input unit 122 . The signal input unit 132, the interface unit 170, and the like may be disposed on the side surface of the terminal body.

The first sound output unit 152 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 sound generated from the first sound output unit 152 is emitted along the assembly gap of the front case 101 and the window and the hall formed independently for the apparent acoustic output is not visible, 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 operation unit 131 receives commands such as start, end, scroll, and the like, and the second operation unit 132 controls the size of the sound output from the first sound output unit 152, Such as switching to the touch recognition mode of the touch panel 151, or the like.

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 flow along the assembly gap of the front case 101 and the window.

The interface unit 170 is 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 may include a 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, etc.) , Or 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.

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

For example, the first camera unit 121 has low pixels so that it is easy to capture a face of a user in the case of a video call or the like and transmit the face to the other party, and the second camera unit 121 ' It is often not transmitted immediately, and therefore it is preferable to have a high pixel. The first and second camera units 121 and 121 'may be installed to be rotatable or pop-up on the terminal body.

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

A 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 for implementing a speakerphone mode in 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.

A battery 190 for supplying power to the mobile terminal 100 is mounted on the terminal body. The battery 190 may be built in the terminal body or detachably attached to the terminal body.

Another interface portion 170 'may be provided on the upper surface of the rear case 102 exposed when the battery cover 103 is detached. The interface unit 170 'has the same or similar structure as 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 connection 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 showing an example of a connection structure between the first terminal portion 172 and the second terminal portion 222 shown in FIG.

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

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

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

The recessed portion 171 is formed to be recessed by a predetermined depth from 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 received . It is preferable that the recess portion 171 is smaller in size than the hole formed in the conventional interface portion and is formed to have a lower depth.

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

The first terminal portion 172 forms at least one surface of the recess portion 171. The first terminal portion 172 may form the bottom surface of the recess portion 171, for example, as shown, or may form a side surface of the recess portion 171. [ The first terminal portion 172 is connected to the circuit board 180 and electrically contacts the second terminal portion 222 to transmit or receive data or to supply power to the battery 190.

A plurality of the recess portions 171 and the first terminal portions 172 may be provided so that the first terminal portions 172 may play different roles. For example, one of the first terminal portions 172 may be configured to transmit or receive data, and the other of the first terminal portions 172 may be configured to supply power to the battery 190.

The first terminal portion 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 of strength such as stainless steel (SUS).

The connector portion 220 of the connector 200 includes a second terminal portion 222 and an elastic portion 223. The configuration of the second terminal portion 222 and the elastic portion 223 can be understood as a pogo pin or a spring pin inserted into the recess portion 171 and elastically contacted with the first terminal portion 172. [

The second terminal portion 222 is formed to protrude from the body 221 of the connector portion 220 and is inserted into the recess portion 171 to be elastically contacted with the first terminal portion 172. The second terminal portion 222 may be formed with an inclined portion 222a having a gradient to correspond to the inclined side surface of the recess portion 171. [

The elastic portion 223 provides an elastic force to the second terminal portion 222 so that the second terminal portion 222 elastically presses the first terminal portion 172. As the elastic portion 223, a spring, an elastic rubber, a sponge, or the like may be used. In this figure, a coil spring-like elastic portion 223 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.

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

A case where the battery 190 of the mobile terminal 100 is charged through a wireless connection between the external device 300 and the connection device 200 will be described as an example. And a primary coil 320 for generating an electromagnetic field is provided in the seating part 310. [ The primary coil 320 may be formed in various shapes such as a square shape and a circular shape.

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

5A to 5C are conceptual diagrams showing a fixing structure between the first terminal portion 172 and the second terminal portion 222 shown in FIG. In the following description of the fixed structure of the present invention, the same or similar components are denoted by the same or similar reference numerals, 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 portion 174 is disposed adjacent to the first terminal portion 172 and is configured to maintain the second terminal portion 222 in elastic contact with the first terminal portion 172. The second fixing portion 224 is disposed corresponding to the first fixing portion 174 and is engaged with the first fixing portion 174. [

5A and 5B, at least one of the first and second fixing portions 174 and 224 includes a magnetic body, and the first fixing portion 174 and the second fixing portion 224 are coupled to each other by a magnetic force . For example, the first fixing portion 174 may be formed of a magnet, and the second fixing portion 224 may be formed of a metal.

5A, the plurality of first fixing parts 174a and 174b and the second fixing parts 224a and 224b are disposed on both sides of the first and second terminal parts 174 and 222, respectively, . 5B, a plurality of first terminal portions 172 'are arranged along one direction, and a plurality of first fixing portions 174a' and 174b 'are provided, and the plurality of first terminal portions 172' May be formed to extend along the one direction with a space 172 'therebetween.

When the first and / or second fixing portions 174 and 224 are formed of magnets, the first and / or second fixing portions 174 and 224 may be disposed 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 formed of a metal to form a first fixing portion 174, and the second fixing portion 224 may be configured to be coupled to the rear case 102, have.

When the first terminal portion 172 and the first fixing portion 174 are provided in plural numbers, the first fixing portion 174 can be made to exert an attractive force only in a relation with the corresponding second fixing portion 224. That is, the first fixing portions 174a and 174b of N poles and S poles are provided on both sides of the first terminal portion 172, and the second fixing portions 174a and 174b of the N pole are disposed at positions corresponding to the first fixing portions 174a. 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 portions 174 and 224 can always be coupled with each other only in a mating relationship, the first and second terminal portions 172 and 222 can be prevented from being connected in the opposite direction .

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

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

Referring to FIG. 5C, the first fixing portion 175 has a receiving groove 175a and a latching groove 175b. The receiving 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. [ An engagement groove 175b may be formed in the receiving groove 175a. The second fixing portion 260 includes a projection 261 and a locking hook 262. The protrusion 261 is formed to protrude from the body 221 and is inserted into the receiving groove 175a. The engaging hook 262 is received in the engaging groove 175b to fix the second fixing portion 260 to the first fixing portion 175. [

The second fixing portion 260 may include an operation portion 263 formed to protrude from the body 221 and configured to release the engagement of the engagement hook 262 with the engagement groove 175b by an operation.

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

The connection structure between the mobile terminal 100 and the connection device 200 has been described in the case where the rear case 102 is made of synthetic resin. However, in the case where most of the rear case 402 is formed of metal as shown in FIG. 6, the connection structure is somewhat different from that of the previous embodiment.

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

The first case 402a is formed of a conductive metal material and has a through hole corresponding to the recess portion 471. [ The second case 402b is inserted into the through hole and forms a lease piece 471 together with the first terminal part 172 and is electrically connected to the first case part 402a by a synthetic resin to separate the first terminal part 472 and the first case part 402a .

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

According to the present invention having the above-described structure, the mobile terminal is provided with a recess portion recessed by a predetermined depth smaller than a size of a conventional hole, and a first terminal portion forming at least one surface of the recess portion, The external appearance of the mobile terminal can be made more simple, the foreign matter can be prevented from penetrating, and as a result, the problem of lower reliability such as contact failure can be improved .

Further, the volume space of the antenna can be ensured due to the simpler structure of the recess portion and the first terminal portion and the degree of freedom of the mounting position. In addition, the coupling force between the mobile terminal and the connection device can be complemented through the first and second fixing parts, and the connection device can be safely separated from the mobile terminal even if an unexpected external force is applied.

The above-described connecting system between the mobile terminal and the connection device is not limited to the configuration and the method of the embodiments described above, but the embodiments may be modified such that all or some of the embodiments are selectively combined .

Claims (11)

A mobile terminal configured to transmit or receive data and having a battery; And
And a connection device connected to the mobile terminal and the external device to transmit or receive data or to supply power to the battery,
The mobile terminal includes:
A recessed portion formed to be recessed by a predetermined depth from one surface of the case; And
And a first terminal portion that forms a bottom surface of the recess portion and is electrically connected to the circuit board,
The connecting device comprises:
A second terminal portion inserted into the recess portion and elastically contacted with the first terminal portion; And
And an elastic portion for providing an elastic force to the second terminal portion so that the second terminal portion elastically presses the first terminal portion,
In this case,
A first case formed of a conductive metal material and having a through hole corresponding to the recessed portion; And
And a second case fitted in the through hole to form the recessed portion,
The second case is located between the first case and the first terminal portion to physically separate the first case and the first terminal portion,
Wherein the second case is formed of a synthetic resin and electrically separates the first case from the first terminal unit. The method according to claim 1,
The side surface of the recess portion is formed to be inclined with respect to the bottom surface,
Wherein the second terminal portion is formed with an inclined portion having a gradient to correspond to the side surface of the recess portion. delete delete The method according to claim 1,
Wherein the external device has a primary coil for generating an electromagnetic field,
Wherein the connecting device further comprises a secondary coil electrically connected to the second terminal and configured to charge the battery using an induction current generated in the primary coil. The method according to claim 1,
The mobile terminal includes a first fixing portion disposed adjacent to the first terminal portion and holding the second terminal portion in an elastic contact state with the first terminal portion,
Wherein the connecting device is provided with a second fixing part which is arranged corresponding to the first fixing part and is coupled to the first fixing part. The method according to claim 6,
Wherein at least one of the first and second fixing portions includes a magnetic body so that the first fixing portion and the second fixing portion are coupled to each other by a magnetic force. 8. The method of claim 7,
Wherein the first and second fixing portions 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 portion is inserted into the first fixing portion so as to be engaged with the first fixing portion. The method according to claim 6,
Wherein the first fixing portion includes magnets disposed on both sides of the first terminal portion and having different electrodes,
Wherein the second fixing portion comprises a magnet having different electrodes so that attraction force acts only between the first fixing portion and the corresponding first fixing portion. The method according to claim 6,
Wherein the first terminal portion includes a plurality of first terminals arranged in one direction,
Wherein the plurality of first fixing portions are formed so as to extend along the one direction with the plurality of first terminals interposed therebetween.

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