KR20180003959A - USB Cable for Data Communication and Rapid Charge - Google Patents

Abstract

The present invention provides a USB cable capable of improving equipment utilization and user convenience by composing to perform data communication and rapid charging. The USB cable for data communication and rapid charging comprises: a plug for host connection; a receptacle for USB equipment connection; a cable having a signal line and a power line between the plug and the receptacle; and a switch module which is a user interface for changing a data communication mode and a rapid charging mode on the receptacle, electrically separates the signal line between the plug and the receptacle and short-circuits the signal line on the receptacle side when being in the rapid charging mode.

Description

[0001] The present invention relates to a USB cable for rapid charging,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a USB cable, and more particularly, to a USB cable for both data communication and rapid charging.

Universal Serial Bus (USB) was developed in 1995 by IBM, Intel, Microsoft, and seven other companies including Compaq, DEC, NEC, and Norton Telecom to replace the existing slow parallel and serial ports with a new, unified interface. Refers to a standard created by a company.

With USB, you can connect up to 128 devices in a single line in theory. In addition, scanners, printers, and other devices connected to a computer complement the existing disadvantages recognized by the computer when the power is turned on while the computer is connected. In other words, it can be used while maintaining the connection status due to the USB function itself regardless of the power state (On or Off) of the equipment connected to the computer, or the connection order. In addition, USB determines whether data is 0 or 1 with a voltage difference of at least 0.7V on two signal lines, so that data can be transmitted / received at a higher rate compared with the conventional method of expressing 0 and 1 at 12V and + 12V have.

A cable (hereinafter referred to as a USB cable) 2 that supports USB includes a cable for connecting a normal plug, a receptacle, a plug and a receptacle as shown in Fig. 1, and the cable includes two signal lines for data transmission and reception, , And two power lines for self-power supply of 100mA / 500mA. For example, when a USB hub is connected to a USB cable, the USB hub receives a power of 500 mA through the USB cable as a high power device, consumes 100 mA itself, And to other equipment connected to the hub.

Meanwhile, the number of portable devices used by individuals is increasing due to the spread of portable devices such as smartphones (Galaxy Note, Optimus G2, iPhone, etc.) and smart pads. Portable equipment usually uses batteries as a power source, so it is necessary to charge them periodically. That is, the smartphone can be connected to the computer body via the USB cable, and the battery mounted on the smartphone can be charged with the power supplied through the power line of the USB cable. However, it takes a considerable amount of time to fully charge the battery when the battery is almost discharged. For example, when charging a battery with a capacity of about 2000 mAh through a USB cable, it takes about 4 hours to charge to 80% of the battery capacity and an additional 2 hours or more to fully charge.

As described above, since it takes a long time to charge a USB device such as a portable terminal by connecting a USB cable to a power supply device (a desktop computer or the like), most users charge the USB device using a separate power adapter USB cable is mainly used for data communication.

The present invention has been made in order to provide an environment for using an efficient USB cable beyond the limit of the prior art described above, and it is an object of the present invention to provide a USB Cable.

The present invention also provides a USB cable capable of preventing the occurrence of problems such as data loss in advance in switching between the data communication mode and the quick charging mode.

According to an aspect of the present invention, there is provided a universal serial bus (USB) cable including a host connection plug, a receptacle for connecting a USB device, a cable having a signal line and a power line between the plug and the receptacle, And a switch module for electrically disconnecting the signal line between the plug and the receptacle in the rapid charging mode and shorting the signal line on the receptacle side.

In one embodiment, the switch module includes: a plurality of terminals arranged between the signal line on the plug side and the signal line on the receptacle side, each of which is connected to each of the signal lines; a slide type selection switch for switching between the data communication mode and the quick charge mode; And a connection terminal array for changing the connection structure of the plurality of terminals according to the selection mode in the selection switch.

In one embodiment, the switch module further comprises a neutral switch for interrupting power supply between the plug and the receptacle in a neutral mode provided between the data communication mode and the rapid charging mode.

A USB cable according to another aspect of the present invention includes a host connection plug, a receptacle for connecting a USB device, a cable having a power line and a signal line between the plug and the receptacle, and a cable for connecting the data communication mode and the quick charge mode on the receptacle. And a switch module for electrically disconnecting the signal line between the plug and the receptacle in the quick charge mode as a user interface and shorting one of the signal lines on the receptacle side to one of the power lines.

In one embodiment, the USB cable further includes a plurality of resistors between the signal lines electrically disconnected and the signal lines shorted to each other and the power line.

In one embodiment, the switch module includes a plurality of terminals arranged between the plug-side signal line and the power line, the receptacle-side signal line, and the power supply line, the signal lines and the power supply lines being connected to each other, And a connection terminal array for changing the connection structure of the plurality of terminals according to the selection mode in the selection switch.

In one embodiment, the switch module further comprises a neutral switch for interrupting power supply between the plug and the receptacle in a neutral mode provided between the data communication mode and the rapid charging mode. Here, the neutral switch is disposed between the plug and the terminal that branches off from the power supply line.

In one embodiment, the USB cable further includes a housing surrounding the receptacle and the switch module, and a light emitting diode mounted on the switch of the switch module and projecting to the outer surface of the housing and emitting light in the fast charge mode. Here, the power input terminal of the light emitting diode is connected to a connection terminal for short-circuiting the signal line and the power line in the connection terminal arrangement.

According to the present invention, it is possible to provide a USB cable capable of improving equipment utilization and user convenience by configuring data communication and quick charging using one USB cable.

According to the present invention, it is possible to provide a USB cable capable of preventing the occurrence of problems such as data loss in the data communication mode and the quick charging mode switching by arranging the neutral mode between the data communication mode and the quick charging mode .

In addition, it is possible to provide a USB cable capable of easily identifying the operation from the outside to the rapid charging mode by the light emitting display which is not displayed in the data communication mode during the rapid charging mode, thereby improving user convenience.

1 is a photograph of a conventional USB cable.
2 is a perspective view of a USB cable according to an embodiment of the present invention;
3 is a perspective view of a switch module that can be used in the USB cable of FIG.
4 is a view for explaining a terminal connection structure in a data communication mode operation of the switch module of FIG.
5 is a view for explaining a terminal connection structure in the quick charge mode operation of the switch module of FIG.
6 is a diagram for explaining a terminal connection structure in a data communication mode operation of a switch module in a USB cable according to another embodiment of the present invention.
FIG. 7 is a view for explaining a terminal connection structure in the fast charge mode operation of the switch module in the USB cable of FIG. 6;
FIG. 8 is a partial circuit diagram for explaining the setting of the resistance value of the connection terminal in the fast charge mode operation of the switch module in the USB cable of FIG. 7;
9 is a view of various plug and receptacle structures applicable to the USB cable of the present invention.

Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail to avoid unnecessarily obscuring the subject matter of the present invention. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.

2 is a perspective view of a USB cable according to an embodiment of the present invention.

2, the USB cable 100 according to the present embodiment includes a plug 10, a receptacle 20, a cable 30, and a switch module 40.

The plug 10 is a connector connected to the host side. The host has a port that can engage with the plug 10. The host has a USB (Universal Serial Bus) controller, permits connection of a USB device, transmits / receives data through data communication with the USB device, and supplies a predetermined power (for example, 5V) to the USB device. For example, the host may be implemented as a desktop computer, a notebook computer, or the like.

The receptacle 20 is a connector connected to the USB device side. The USB device is a device that can operate as a slave corresponding to a host and has a port that can be coupled with the receptacle 20. A USB device refers to a device having a USB (Universal Serial Bus) controller and capable of processing data by a USB communication method. For example, the USB device can be implemented as a digital camera, a multimedia player, a smart pad, a smart phone (here, a smart phone refers to a high performance and high performance portable terminal such as an iPhone or a Galaxy Note), and a data storage device.

The cable 30 has a signal line and a power line connecting between the plug 10 and the receptacle 20, and a shielding layer and / or a covering layer for shielding and protecting them. The power supply line includes a first power supply line of a first potential and a second power supply line of a second potential (or ground) lower than the first potential. The power line is composed of conductive wirings having a certain cross sectional area or more and includes a thicker wire or a wire having a larger cross-sectional area in order to reduce a loss due to a voltage drop. The cable 30 may have a standardized length of 50 cm, 100 cm, or the like.

The switch module 40 is a physical user interface that couples to the receptacle 20 to set the operating mode of the USB cable. More specifically, the switch module 40 sets the operation mode so that the USB cable operates in either a data communication mode or a rapid charge mode.

In one embodiment, the switch modems 40 are operable to electrically isolate the signal lines between the plug 10 and the receptacle 20 during rapid mode charging and to short the signal lines on the receptacle side.

In another embodiment, the switch module 40 electrically disconnects the signal line between the plug 10 and the receptacle 20 during rapid mode charging, shorts one of the signal lines on the receptacle side and one of the power supply contacts, And short-circuits the remaining one of the signal lines and the other of the power lines.

In yet another embodiment, the switch module 40 may be configured to further include a neutral mode between the data communication mode and the rapid charge mode.

As shown in the enlarged view of the function of the switch module 40 of FIG. 2, the neutral mode is neutralized between the data communication mode (D) 40D and the rapid charging mode (C) 40C. When the selection switch (see 42 in FIG. 3) of the switch module 40 is switched from the data communication mode 40D to the neutral mode 40N, the data communication mode 40D (See 431, 432 and 433 in FIG. 4) of the connecting terminals 432 (see FIG. 4) move so that at least one connecting terminal 432 is separated from the terminals (see 412 and 414 in FIG. 4). At this time, the two signal lines (see 413 and 414 in Fig. 4) of the switch module 40 are not yet turned on, and data communication between the host and the USB device is interrupted. When the selection switch of the switch module 40 is switched from the neutral mode 40N to the rapid charging mode 40C, the connection terminal arrangement in the neutral mode 40N is shifted, (See 431, 432 and 433 in Fig. 5).

At this time, the two signal lines (see 413 and 414 in Fig. 5) of the switch module 40 are switched to the conductive state, and the USB device is powered by a relatively high power (such as a voltage higher than + As shown in FIG.

The above-described neutral mode 40N is substantially the same even when the reverse operation mode is switched, that is, when the mode is switched from the rapid charging mode to the data communication mode. In the case of the USB cable described with reference to FIGS. 6 and 7 The neutral mode operation can be performed between the data communication mode and the rapid charge mode by an operation principle similar to the operation principle of the neutral mode described with reference to FIGS.

In a modification of the configuration including the neutral mode, a separate neutral switch (see 40B in FIG. 7) is provided on the power line, and when the data communication mode is switched to the rapid charging mode, Mode, the power supply of the power supply line is temporarily shut off, so that the data communication mode and the rapid charge mode can be switched more safely, thereby preventing the occurrence of problems such as data loss at the time of switching the operation mode.

By configuring the switch module to include the neutral mode described above, it is possible to prevent a host (notebook computer or the like) or a quick charging operation from malfunctioning when switching the operation mode of the USB cable.

On the other hand, the USB cable 100 of this embodiment may include a part of the receptacle 20 and a cover 50 surrounding the switch module 40. The cover (50) places the switch module (40) on one side of the receptacle (20) and integrates them. The cover 50 may be integrally formed of a sheath material of the cable 30. [ In addition, the USB cable 100 may be configured so that a part of the switch module 40 is exposed or protruded on the cover 50 in accordance with the implementation.

3 is a perspective view of a switch module that can be used in the USB cable of FIG.

Referring to FIG. 3, the switch module 40 according to the present embodiment includes a plurality of terminals (see 411, 412, 413, and 414 in FIGS. 4 to 7), a selection switch 42, 4 to 431, 432, 433, and 434 in FIG. 7).

The plurality of terminals are connected to a first group of terminals (see 411 and 412 in Fig. 4) to which the plug-side or host-side signal lines (see S1 and S2 in Fig. 4) (Refer to 413 and 414 in Fig. 4) to which the first group (refer to S3 and S4 in Fig. 4) are connected, respectively.

The selection switch 42 is a physical switch for selecting the operating mode of the USB cable, that is, the data communication mode and the quick charging mode. The selection switch 42 may be implemented as a slide switch or a switch performing a similar function.

The connection terminal arrangement changes the connection structure of the plurality of terminals according to the selection mode or the mode selection position of the selection switch 42. The connection terminal arrangement will be described in detail below. Such a connection terminal arrangement can be realized by a conductive material such as a flat bar-shaped copper plate.

The switch module 40 according to the present embodiment includes a light emitting diode 60 mounted on or integrated with the selection switch 42 and emitting light to the outside of the housing surrounding the receptacle and the switch module in the quick charge mode operation .

Further, the light emitting diode 60 is arranged to perform the light emitting operation and the non-light emitting operation according to the mode selection position of the switch module 40. [ For example, a power input terminal (not shown) of the light emitting diode 60 is connected between the connection terminal (see 433 in FIG. 5 or 433 and 434 in FIG. 7) and the ground to emit light or not emit light depending on the position of the connection terminal Can be implemented.

4 is a view for explaining a terminal connection structure in the data communication mode of the switch module of FIG.

4, the switch module 40 according to the present embodiment includes a plurality of terminals 411, 412, 413 and 414, a selection switch 42 (see FIG. 3), and connection terminal arrays 431, 432, 433).

The first terminal and the second terminal 411 and 412 of the plurality of terminals are electrically connected to the signal line S1, S2, S3, and S4 passing through the inside of the cover and the power supply lines P1 and P2, (S1, S2), respectively. The third terminal and the fourth terminal 413 and 414 of the plurality of terminals are connected to the two signal lines S3 and S4 on the USB device side or the receptacle side, respectively.

According to the structure of the plurality of terminals which are electrically separated from each other, the two signal lines (S1, S2) on the host side and the two signal lines (S3, S4) on the USB equipment side have a normally open state between the plurality of terminals.

The first connection terminal 431 of the connection terminal arrangement connects the first signal line S1 on the host side and the third signal line S3 on the USB device side through the two signal lines S1 and S3 forming the first channel And functions to enable data communication.

The second connection terminal 432 of the connection terminal arrangement connects the second signal line S2 on the host side and the fourth signal line S4 on the USB equipment side by connecting the two signal lines S2 and S4 forming the second channel So that data communication can be performed via the network.

The third connection terminal 433 of the connection terminal arrangement is integrated with the first connection terminal 431 to form a T-shaped terminal.

The first to third connection terminals 431, 432 and 433 are moved to one side according to the selection mode or the mode selection position of the selection switch which is integrally coupled to the support member or the connection terminal array case.

5 is a view for explaining a terminal connection structure in the quick charge mode operation of the switch module of FIG.

5, when the rapid charging mode is selected in the switch module 40 and the selection switch is aligned with the selection position of the rapid charging mode, the first connection terminal 431, the second connection terminal 432, The terminal 433 is moved and aligned by a predetermined distance in a predetermined movement direction 42A so that the first terminal 411 and the third terminal 413, which are connected to each other by the first connection terminal 431, And the second terminal 412 and the fourth terminal 414, which are electrically connected to each other by the second connection terminal 432, are electrically disconnected from each other. The receptacle-side third terminal 413 and the fourth terminal 414 which are separated from each other are brought into contact with each other by the third connection terminal 433.

The two signal lines S1 and S2 on the host side and the two signal lines S3 and S4 on the USB equipment side are electrically separated from each other and the USB device side, The signal lines S3 and S4 are connected to each other.

When the two signal lines S3 and S4 on the receptacle side are short-circuited, the USB device releases its restriction on the current on the power line and pulls power from the host with a current larger than the previous current (for example, 1A or more) do.

According to the present embodiment, it is possible to rapidly charge the battery at a rate twice as fast as that of the conventional USB 2.0 or 500 mA compared to 900 mA for the conventional USB 3.0.

On the other hand, in the case of a smart phone, an iPhone-based smartphone that uses iOS largely according to an operating system uses a signal line and a power line of a USB cable in a slightly different manner from a smartphone such as a Galaxy Note using an Android. 6 and 7, the operation mode of the USB cable will be described on the assumption that the iOS-based USB device is connected to the host device.

6 is a view for explaining a terminal connection structure in a data communication mode operation of a switch module in a USB cable according to another embodiment of the present invention.

6, the switch module 40A according to the present embodiment includes a plurality of terminals 411, 412, 413, 414, 415 and 416, a selection switch 42 (see FIG. 3) 431, 432, 433, and 434.

The first to fourth terminals 411 to 414 of the plurality of terminals are substantially the same as the corresponding first to fourth terminals of the switch module 40 described above with reference to FIG. do. The detailed description of the selection switch is omitted in order to avoid duplication.

The fifth terminal 415 of the plurality of terminals is provided so as to face the third terminal 413 by branching from the first power line P1.

Similarly, the sixth terminal 416 is branched so as to face the fourth terminal 414 from the second power line P2.

The fifth terminal 415 and the sixth terminal 416 are connected to the fifth terminal 415, the third terminal 413, the sixth terminal 416 and the fourth terminal 414 at predetermined intervals Respectively. This takes into consideration the connection terminals 433 and 434 which move in the same direction when the selection switch is moved by a predetermined length in one direction (see 42A in FIG. 7).

The first connection terminal 431 of the connection terminal arrangement interconnects the first signal line S1 and the third signal line S3 and the second connection terminal 432 connects the second signal line S2 and the fourth signal line S4 ). The third connection terminal 433 of the connection terminal arrangement is disposed substantially parallel to the connection line of the third terminal 413 and the fifth terminal 415 and has a first connection terminal 431 connected to one side of the intermediate portion, Thereby forming a T-shaped composite connection terminal. The fourth connection terminal 434 of the connection terminal arrangement is disposed substantially parallel to the connection line of the fourth terminal 414 and the sixth terminal 416 and has a second connection terminal 432 ) And a T-shaped composite connection terminal.

FIG. 7 is a view for explaining a terminal connection structure in the quick charge mode operation of the switch module in the USB cable of FIG. 6;

7, when the rapid charging mode is selected in the switch module 40A and the selection switch is aligned with the selection position of the rapid charging mode, the first composite terminal 431 and the third connection terminal 433 The second composite connection terminals of the connection terminal, the second connection terminal 432 and the fourth connection terminal 434 are moved and aligned by a predetermined distance in a predetermined movement direction 42A, whereby the first connection terminal 431 The first terminal 411 and the third terminal 413 which are connected to each other by the second connection terminal 432 are electrically separated and the second terminal 412 and the fourth terminal 414 are electrically separated from each other. The third terminal 413 and the fifth terminal 415 on the receptacle side which are separated from each other are connected to each other by the third connection terminal 433 and the fourth terminal 414 on the receptacle side, And the sixth terminals 416 are connected to each other by a fourth connection terminal 434.

According to the quick charge mode operation of the above-described switch module, the two signal lines S1 and S2 on the host side and the two signal lines S3 and S4 on the USB equipment side are electrically separated from each other. The USB device side, that is, the third signal line S3 on the receptacle side is connected to the first power line P1 and the fourth signal line S4 is connected to the second power line P2.

When the two signal lines S3 and S4 on the receptacle side are respectively connected to the power line, the USB device releases its own restriction on the current on the power line and draws power from the host with a current larger than the previous current for quick charging.

In addition, the USB cable according to the present embodiment may be configured to include a neutral mode. For reference, the following neutral switch 40B and the interlocking operation of the neutral switch and the selection switch can be substantially applied to the USB cable referring to Figs. 4 and 5. Fig.

The neutral switch 40B is provided in the middle of the power supply line P1 to cut off the power supply of the power supply line P1. More specifically, the power supply line P1 is provided between the power supply lines on the host side rather than the branch point of the fifth terminal 415. The neutral switch 40B may be provided in the power supply line P1 as well as another power supply line P2 in accordance with the implementation.

The interlocking of the selection switch of the switch module 40A and the neutral switch 40B is accomplished by disposing additional power terminals (not shown) (not shown) 411 and 413 in the power line P1 and a power connection terminal (Or disconnected / opened) state in the case of switching from the data communication mode to the neutral mode in the conventional connection terminal array and the neutral mode in the rapid charging mode after the battery is arranged so as to be turned on / off in the form of a toggle switch, (Or connection / short circuit) state at the time of mode switching.

According to the present embodiment, when the data communication mode is switched to the rapid charging mode, the neutral switch is interlocked with the selection switch to temporarily shut off the power source of the power source line in the neutral mode, thereby switching the data communication mode and the rapid charging mode more safely , Whereby it is possible to effectively prevent a problem such as data loss or the like from occurring when switching the operation mode.

8 is a partial circuit diagram for explaining the setting of the resistance value of the connection terminal in the fast charge mode operation of the switch module in the USB cable of FIG.

8, when the switch module 40A is operated in the rapid charging mode, a voltage is applied between the third signal line S3 and the first power line P1 and between the fourth signal line S4 and the second power line P2 The connection terminals 433 and 434 are designed so that an appropriate resistance value by the connection terminal is set.

To this end, the third connection terminal 433 may be implemented as a resistor R1 between one end of the third connection terminal 433 and the other end of the third connection terminal 433 in contact with the fifth terminal 415.

For example, the third connection terminal 433 may be implemented in a sandwich configuration with a material having a resistance of about 50 kΩ sandwiched therebetween, or the fifth terminal 415 itself may be implemented by a resistor of about 50 k? It is possible to do. In the case of the third connection terminal 433 of the sandwich structure, the first connection terminal 431 contacts the one end (third terminal side) of the third connection terminal 433 and the other end Terminal side).

Similarly, the fourth connection terminal 434 may be implemented as a resistor R1 between the one end of the fourth terminal 414 and the other end of the fourth terminal 414, which is in contact with the sixth terminal 416. Also, depending on the implementation, the sixth terminal 416 itself can be implemented as a resistor of about 50 k ?. The resistance value of the above-described resistor R1 is about 50 k? For example, but not limited thereto.

9 is a view of various plug and receptacle structures applicable to the USB cable of the present invention.

9, the USB cable according to the present embodiment includes a type A (10A), a type B (10B) of a standard USB connector, a micro-A (20A), a micro-B 20B, Mini-A 20C, and Mini-B 20D as plugs and receptacles.

The standard standard USB connector and the USB connector for the mini cable or the micro cable are already well known and will not be described in detail here.

According to the above-described embodiment, it is possible to provide a USB cable that can easily select two operation modes for data communication and rapid charging by using the T-shaped connection terminal and the selection switch, thereby improving the equipment efficiency and user convenience .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be apparent to those skilled in the art that various combinations and modifications may be made without departing from the scope of the present invention. Therefore, it should be understood that the technical contents related to the modifications and applications that can be easily derived from the embodiments of the present invention are included in the present invention.

10: Plug
20: Receptacle
30: Cable
40: Switch module
50: cover
60: Light emitting diode

Claims (8)

Plug for host connection;
Receptacle for connecting USB devices;
A cable having a signal line and a power line between the plug and the receptacle; And
And a switch module for electrically disconnecting the signal line between the plug and the receptacle and shorting the signal line on the receptacle side in the quick charge mode, USB cable. The method according to claim 1,
The switch module includes:
A plurality of terminals arranged between the signal line on the plug side and the signal line on the receptacle side, the signal lines being connected to each other;
A slide type selection switch for switching between the data communication mode and the rapid charging mode; And
A connection terminal array for changing a connection structure of the plurality of terminals according to a selection mode in the selection switch;
USB cable including. The method according to claim 1,
And a neutral switch for interrupting power supply between the plug and the receptacle in a neutral mode provided between the data communication mode and the rapid charging mode. Plug for host connection;
Receptacle for connecting USB devices;
A cable having a power line and a signal line between the plug and the receptacle; And
A user interface for switching between a data communication mode and a rapid charging mode on the receptacle, the user interface electrically separating a signal line between the plug and the receptacle during the rapid charging mode, and electrically connecting one of the signal lines on the receptacle to one of the power lines A shorting switch module;
USB cable including. The method of claim 4,
Further comprising a plurality of resistors between the electrically separated signal lines and between the shorted signal line and the power line. The method of claim 4,
The switch module includes:
A signal line and a power source line disposed on the plug side and a power source line and a signal line on the side of the receptacle,
A plurality of terminals to which the power supply lines are respectively connected;
A slide type selection switch for switching between the data communication mode and the rapid charging mode; And
A connection terminal array for changing a connection structure of the plurality of terminals according to a selection mode in the selection switch;
USB cable including. The method of claim 6,
And a neutral switch for interrupting power supply between the plug and the receptacle in a neutral mode provided between the data communication mode and the rapid charging mode. The method of claim 6,
A housing surrounding the receptacle and the switch module; And
A light emitting diode mounted on the selection switch of the switch module and protruding from the outer surface of the housing and emitting light to the outside in the fast charge mode;
Further comprising:
And a power input terminal of the light emitting diode is connected to a connection terminal for shorting the signal line and the power line among the connection terminal array.

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