KR101314379B1 - Usb memory stick device for combining a usb hub and drive method - Google Patents

Usb memory stick device for combining a usb hub and drive method Download PDF

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Publication number
KR101314379B1
KR101314379B1 KR1020130012267A KR20130012267A KR101314379B1 KR 101314379 B1 KR101314379 B1 KR 101314379B1 KR 1020130012267 A KR1020130012267 A KR 1020130012267A KR 20130012267 A KR20130012267 A KR 20130012267A KR 101314379 B1 KR101314379 B1 KR 101314379B1
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KR
South Korea
Prior art keywords
usb
hub
communication terminal
board
usb device
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Application number
KR1020130012267A
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Korean (ko)
Inventor
이승진
방창혁
김영규
Original Assignee
주식회사 베프스
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Priority to KR1020130012267A priority Critical patent/KR101314379B1/en
Application granted granted Critical
Publication of KR101314379B1 publication Critical patent/KR101314379B1/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
    • G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
    • G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
    • G06K19/0772—Physical layout of the record carrier
    • G06K19/07732—Physical layout of the record carrier the record carrier having a housing or construction similar to well-known portable memory devices, such as SD cards, USB or memory sticks
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2212/00—Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
    • G06F2212/21—Employing a record carrier using a specific recording technology
    • G06F2212/214—Solid state disk
    • G06F2212/2146—Solid state disk being detachable, e.g.. USB memory
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]

Abstract

PURPOSE: A universal storage bus (USB) memory stick device and an operating method thereof are provided to extend the number of external hardware devices connecting to a dedicated USB hub of a restricted communication terminal. CONSTITUTION: A USB device (100) connected to a USB hub (400) for a communication terminal is determined as a component. A USB board (200) executes authentication for a connection attempt through self-loading, receives approval for the USB device from the communication terminal, and opens data files stored in an embedded memory unit. A USB hub (300) is selected as a sub-USB hub and automatically receives USB port connection with the one of the external hardware devices. [Reference numerals] (100) USB device; (200) USB board; (300) USB hub; (400) UBS hub for communication terminal

Description

USB Memory Stick Device for combining a USB Hub and drive Method with USB Hub

The present invention relates to a memory component and a design technology, and in particular, when a USB device that is collocated with a hinge part of a USB board is plugged into a USB hub dedicated to a communication terminal, at the same time the data files stored in the memory part of the USB board are opened to the communication terminal. A USB memory stick device having a USB hub for accommodating a selected one of a plurality of external hardware devices connected to a hub and a port, and a driving method thereof.

With the development of information and communication technology, computers that are widely used may cause important data loss due to various hardware or software errors. Therefore, data backup works using data storage media such as hard disk, magnetic tape or optical disk. Is doing.

Currently, optical disks such as CD-ROMs are the most widely used storage media, which are slower in response to hard disks, but are widely used because they can store a large amount of data at a low price. However, the CD-ROM has a limitation in erasing or recording again once the data is stored, and there is a problem in that it is inconvenient as a portable storage medium because of its large volume.

In order to solve this problem, a memory device for USB is used, which provides data to a host system through a connector supporting serial, parallel and USB interfaces, thereby enabling storage and movement of a large amount of data.

Most USB memory devices have a storage device employing a flash memory device, and a data transmission method using a USB port of a host system has become common.

Meanwhile, as the USB memory device becomes thinner, securing a mounting space of circuit elements including a memory chip is a very important and technically difficult task. In order to solve this problem, a memory device is recently implemented using a chip on board (COB) process. COB technology directly prints a circuit in a state in which a memory chip, which is a core component of the memory device, is in a wafer state. Board, PCB) is one of the surface mounting technologies for forming by connecting gold wires.

Information terminal devices such as PCs, laptops, MP3s, and digital cameras, which are widely used with the development of information and communication technology, may cause major data loss due to various hardware or software errors, such as hard disks, magnetic tapes, or optical disks. I'm using a data storage device to back up data.

As such a storage device, an optical disk such as a CD-ROM is most used, which is slower in access speed than a hard disk, but is widely used because it can store a considerable amount of data at a low price. However, the CD-ROM has a disadvantage in that once recorded and stored, there is a limit in erasing or recording again. In addition, the CD-ROM is inconvenient when moving due to its large volume, and has a disadvantage in stability due to data corruption caused by dust or electromagnetic during movement.

As a conventional USB memory device, there is Unexamined Utility Model Publication No. 20-2008-0004451 and Registered Utility Model Publication No. 20-0439438. The slide type USB memory device disclosed in Korean Utility Model Publication No. 20-2008-0004451 includes a USB memory stick having a terminal portion connected to the system in front and a flash memory chip; And the memory stick is accommodated, the entrance for the entrance and exit of the terminal portion is formed in the front, it is configured to include a case opening up and down so that the user can hold the memory stick and slide. In addition, the sliding type USB memory device of the Utility Model Publication No. 20-0439438, the upper surface and the front surface is open, having a guide groove formed in the longitudinal direction on both sides of the inside, the front surface has a step; And an upper surface having the same size as the upper surface of the opened main body, the lower surface of which is opened to accommodate a printed circuit board having a connection terminal for connecting to a USB device and a memory for storing data, and forming a step with the upper surface. The guide rail protruding a predetermined length from both sides includes a cover formed in the longitudinal direction, and the guide rail is engaged with the guide groove so that a part of the cover protrudes to the front of the main body. In the conventional USB memory devices as described above, aging is increased due to the friction of the mechanical configuration when sliding for the extraction of the USB connection terminal in a fastening method of the mechanical configuration, the damage and durability There is a problem of this weakening. This problem results in shortening the lifespan of the USB memory device, and the user may not only have difficulty in utilizing the stored data, but also incur additional costs such as the need to purchase a new USB memory device.

The USB memory stick device having a USB hub of the present invention and a method of driving the same have been devised to solve the problems of the prior art, and a first object of the present invention is to confine a hinge portion formed on an upper surface of a USB board. When the USB device is plugged into the dedicated USB hub of the communication terminal, data files stored in the memory section of the USB board are opened to the communication terminal, and simultaneously selected one of a plurality of external hardware devices connected through the USB hub formed on one side of the USB device is connected. By accommodating, the number of external hardware devices to be connected to a dedicated USB hub of a communication terminal having a limited number of USB ports is further expanded.

In addition, a second object of the present invention is to use a USB hub and a USB device can be used to read / write data files stored on the memory unit mounted in the aircraft via a communication terminal and at the same time a number of external hardware devices on the USB hub This is to further expand and complement the mutual interface, storage space, or power relationship for the communication terminal by connecting one selected port.

In addition, the third object of the present invention is to easily carry and to meet the buyer's purchase needs due to the combined use of the USB hub and USB devices at the buyer's choice to further increase the product purchase rate, This is to contribute to the industrial development by further improving the sales of operating businesses.

The present invention for achieving the above object includes the following configuration.

That is, when a USB memory stick device having a USB hub according to an embodiment of the present invention binds a USB device to a hinge portion that is formed on an upper surface, and recognizes the USB device that is plugged into a USB hub dedicated to a communication terminal, A USB board for opening the data files stored in the memory unit on which the USB device is connected to the USB device from the communication terminal that has completed the verification process and verification procedure for the connection attempt of the USB device through self-loading; And a second USB hub formed on an upper side of the USB board on the opposite side of the USB device, and is selected as an auxiliary USB hub that replaces the dedicated USB hub when the communication terminal approves the connection to the USB device. And a USB hub that automatically accepts a USB port connection with a selected one of an external hardware device, wherein the body portion of the USB device is rotated from -45 to 180 degrees in confinement with the hinge portion and the USB portion when rotated by 180 degrees. The socket part of the device is set on the upper surface of the USB board by being rotated in the same direction as the direction in which the socket part of the USB hub is located. The socket part of the USB device is located at the socket part of the USB hub when it is rotated from -45 to 0 degrees. It is characterized by being set out of the upper surface of the USB board by moving the reverse rotation in the opposite direction.

In addition, a method of driving a USB memory stick device having a USB hub according to an embodiment of the present invention, comprising: concatenating a USB device on a hinge portion of which a USB board is formed on an upper surface thereof; Recognizing, by the USB board, a USB device plugged into a USB hub dedicated to a communication terminal; Performing, by the communication terminal, verifying and attempting to verify a connection attempt of the USB device through self loading; The USB board receiving a connection to the USB device from the communication terminal to open data files pre-stored in a memory unit mounted thereon; A USB hub formed on one side of the USB device on the opposite side of the USB board; Approving the connection to the USB device by the communication terminal; Selecting the USB hub as a secondary USB hub replacing the dedicated USB hub for the communication terminal; And the USB hub automatically accepting a USB port connection with a selected one of a plurality of external hardware devices, wherein the body portion of the USB device is rotated at -45 to 180 degrees in association with the hinge portion, and the 180 When rotated back, the socket portion of the USB device is rotated and set in the same direction as the direction in which the socket portion of the USB hub is located, and is set on the upper surface of the USB board. It is characterized in that the reverse rotation is moved in the opposite direction to the direction in which the socket portion of the USB hub is located is set out of the upper surface of the USB board.

The USB memory stick device having a USB hub of the present invention and a method of driving the same may include data files stored in a memory unit of a USB board when a USB device attached to a hinge portion formed on the upper surface of the USB board is plugged into a USB hub dedicated to a communication terminal. Opens to a communication terminal and simultaneously accepts a selected one of a plurality of external hardware devices connected through a USB hub formed on one side of the USB device, thereby connecting to a dedicated USB hub of a communication terminal with a limited number of USB ports. The first effect is to further expand the number of connections of the hardware device.

In addition, the present invention can use a USB hub and a USB device can read and write data files stored on the memory unit mounted in the cabin through a communication terminal, and at the same time select one of a plurality of external hardware devices in the USB hub. By connecting the port, it has a second effect of further compensating for the mutual interface, storage space, or power relationship for the communication terminal.

In addition, the present invention satisfies the buyer's purchase needs due to the ease of portability and the combination of USB hub and USB device can be used at the buyer's choice, further increasing the product purchase rate, It further improves sales and gives a third effect to contribute to industrial development.

1 is a block diagram illustrating a USB memory stick device having a USB hub according to an embodiment of the present invention.
2 is a diagram illustrating a USB memory stick device having a USB hub according to an embodiment of the present invention.
3 is a flowchart illustrating a method of driving a USB memory stick device having a USB hub according to an embodiment of the present invention.

[Example]

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a USB memory stick device having a USB hub according to an embodiment of the present invention.

Referring to FIG. 1, a USB memory stick device 1000 having a USB hub 300 includes a USB device 100 that is collocated with a hinge 210 of a USB board 200 to a USB hub 400 dedicated to a communication terminal. When plugged in, the device opens a data file stored in a memory unit (not shown) of the USB board 100 in a communication terminal and at the same time receives a selected one of a plurality of external hardware devices connected to the USB hub 300 and a port. 100, a USB board 200, and a USB hub 300.

The biggest feature of the USB device 100 is simplicity. Since the USB device 100 supports Plug and Play function, when the USB device 100 is plugged into a personal computer (PC), one of the communication terminals detects a connection state directly from the PC. Software installation may be required).

Conventional USB device 100 is often required to turn off the computer before being connected to a PC, but the USB device 100 of the present invention supports a hot swapping (Hot Swapping) function, even if the PC is turned on It can be connected, disconnected or exchanged.

As shown in FIG. 2, the USB board 200 binds the USB device 100 to a hinge portion 210 formed on an upper surface thereof, and is connected to a USB hub 400 dedicated to a communication terminal. ), Verify the connection attempt of the USB device 100 through self-loading and the memory unit (not shown) that is approved for connection to the USB device 100 from the communication terminal that completed the verification procedure Open my saved data files.

The USB board 200 is a type of board that connects the lines wired to the USB device 100 and the USB hub 200 to each other. The USB board 200 has a memory unit that stores a data file input through the USB device 100. In addition, a processor (or CPU) (not shown) for controlling an interface between the USB device 100 and the USB hub 300 is provided.

The USB hub 300 is a PC peripheral device made to plug a USB port in a small device related to a PC such as a mouse, a keyboard, a printer, a digital camera, an MP3 player, and a bus-power hub according to a power supply method. And self-power hubs.

The non-powered hub provides all the power through the PC's USB port. Therefore, the total available current is constant regardless of the number of expansion ports that depend on the hub. For example, if you plug a four-port USB powered hub into a 500mA USB 2.0 terminal, the total current used by the four terminals cannot exceed 500mA.

If you connect a device that uses all 500mA to it, the other three terminals will be useless. In other words, if you want to take advantage of all of the extension terminals of a non-powered hub, you should plug in only low-power devices that do not exceed 500mA, even if the current from multiple devices, such as a mouse or keyboard, is combined.

 The source hub is powered from an external source via a separate AC power adapter (unless the adapter is connected, it can be used the same way as a non-powered hub). Therefore, in principle, a device using 500 mA may be plugged into both extension terminals.

However, since the hub itself uses power, the actual available current is slightly less. For example, the maximum usage of a 7-port genetic hub is about 3A instead of 3.5A (500mA × 7). In general, cell phone chargers, external hard disks, wireless LAN cards, and scanners require high power, and if you mix them with one or two low-power devices, you will be able to use all ports.

USB hub 300 of the present invention is formed on the opposite side of the USB device 100 on the upper surface of the USB board 200, when the communication terminal approves the connection to the USB device 100 USB dedicated communication terminal It is selected as a second USB hub to replace the hub 400 and automatically accepts a USB port connection with a selected one of a plurality of external hardware devices.

That is, the USB hub 300 automatically accepts a port connection for an interface device related to mutual input / output such as a mouse, a keyboard, a printer, a scanner, or a multifunction device as the communication terminal approves the connection to the USB device 100.

Since the USB hub 300 can supply power (5V voltage) to peripheral devices by itself from the socket part 320 which is equipped with equipment, most of small devices such as a mouse, a keyboard, and an external hard disk among USB standard products are separate power supplies. It works without plugging in and can be operated without a power supply, even in large devices such as printers and scanners.

The USB hub 300 may also be used for charging a mobile device such as a mobile phone or an MP3 player using such a power charging relationship.

The first USB line (not shown) wired in the USB hub 300 is connected to the second USB line (not shown) wired in the USB board 200 and is connected in parallel with the second USB line (not shown). It is also connected to a third USB line (not shown) wired in the socket portion 120 of the connected USB device 100.

In more detail, the body portion 110 of the USB device 100 according to the embodiment of the present invention is convoluted with the hinge portion 210 is rotated -45 to 180 degrees, when rotated 180 degrees of the USB device The socket portion 120 is rotated in the same direction as the direction in which the socket portion 320 of the USB hub 300 is located, and is the same as the body portion 310 of the USB hub 300 on the upper surface of the USB board 200. It is set to be placed on the line, when rotated from -45 to 0 degrees, the socket portion 120 of the USB device 100 is moved in reverse rotation in the opposite direction to the direction in which the socket portion 320 of the USB hub 300 is located. The board 200 is set out of the top surface.

The body unit 110 of the USB device 100 may mount another memory unit (not shown) having a storage space of the same or smaller size than the total storage amount occupied by the memory unit (not shown).

Another memory unit (not shown) may be designated as a sub storage space or a main storage space by the communication terminal, and the detailed part information is provided to the communication terminal because the connection of the USB device 100 is approved.

3 is a flowchart illustrating a method of driving a USB memory stick device having a USB hub according to an embodiment of the present invention.

Referring to FIG. 3, a method of driving a USB memory stick device having a USB hub includes data files stored in a memory unit of a USB board when the USB device connected to the hinge portion of the USB board is inserted into a USB hub dedicated to the communication terminal. At the same time as open, it accepts a selected one of a number of external hardware devices connected to a USB hub and port.

First, the USB board recognizes a USB device connected to a USB hub dedicated to a communication terminal by linking a collapsing function between a USB device and a hinge portion formed on an upper surface of the USB board (S100, S110).

The communication terminal completes the verification and verification procedure for the connection attempt of the USB device through self loading (S120).

The USB board receives the connection to the USB device from the communication terminal, and opens the data files stored in the memory unit mounted (S130 and S140).

As the USB board presents the data files to the USB device placed on the opposite side so as to correspond to the USB hub located on one side of the upper surface of the USB board (S150), the communication terminal provides access to the data files presented through the USB device. Approve (S160).

delete

Since the USB hub is selected as a secondary USB hub that replaces a dedicated USB hub for communication terminals, the USB hub automatically accepts a USB port connection with a selected one of a plurality of external hardware devices (S170 and S180).

A method of driving a USB memory stick device having a USB hub according to an embodiment of the present invention performs additional operations as described below.

That is, the body portion of the USB device is convoluted with the hinge portion provided on the top of the USB board is rotated by -45 to 180 degrees. If it is rotated 180 degrees, the socket portion of the USB device is rotated in the same direction as the direction in which the socket portion of the USB hub is located, and is set to be in line with the body portion of the USB hub on the upper surface of the USB board. When rotated to 0 degrees, the socket part of the USB device is rotated in the opposite direction to the direction in which the socket part of the USB hub is located and is set out of the upper surface of the USB board.

After the connection of the USB device is approved, the body part of the USB device provides the communication terminal with detailed part information about the other memory part so as to designate another memory part provided as a sub storage space or a main storage space.

At this time, the other memory unit has a storage space of the same size or less than the total storage space preset in the memory unit.

In addition, after a USB port connection between the selected one of a plurality of external hardware devices and the USB hub is made, the first USB line wired in the USB hub is in parallel with the second USB line and the second USB line wired in the USB board. It is connected to the third USB line wired in the socket portion of the connected USB device.

Here, the USB hub provides detailed communication information about the selected one of the plurality of external hardware devices to the communication terminal using the first, second, and third USB lines.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

1000: USB Memory Stick Device
100: USB device 200: USB board
210: hinge portion 300: USB hub
400: USB hub dedicated communication terminal

Claims (7)

When the USB device connected to the USB hub dedicated to the communication terminal is recognized as a part by linking the hinge part formed on the upper surface with the USB device, the connection of the USB device is attempted through self-loading. A USB board which opens data files pre-stored in a memory unit on which the pre-stored memory unit is approved by the communication terminal that has completed the verification and verification procedures; And
It is formed on one side of the opposite side of the USB device on the upper surface of the USB board, when the communication terminal approves the connection to the USB device is selected as a secondary USB hub to replace the dedicated USB hub for a plurality of external type Includes a USB hub that automatically accepts USB port connections with one of the hardware devices,
The body part of the USB device is rotated by -45 to 180 degrees in association with the hinge portion, and when rotated by 180 degrees, the socket portion of the USB device is rotated in the same direction as the direction in which the socket portion of the USB hub is located and the USB portion is rotated. Is set on the upper surface of the board, When rotated to -45 to 0 degrees, the socket portion of the USB device is rotated in the opposite direction to the direction in which the socket portion of the USB hub is located is set out of the upper surface of the USB board The body portion of the USB device,
And a different memory unit having a storage space of the same or smaller size than the total storage amount of the memory unit.
delete The method of claim 1, wherein the other memory unit,
The USB memory stick device having a USB hub, which is designated by the communication terminal as a sub storage space or a main storage space and provides detailed part information to the communication terminal because the connection of the USB device is approved.
The method of claim 1, wherein the first USB line wired in the USB hub,
And a USB hub connected to a second USB line wired in the USB board, and connected to a third USB line wired in a socket of the USB device connected in parallel and in parallel with the second USB line. USB memory stick device.
Linking a USB device with a hinge portion formed on an upper surface of the USB board, wherein the USB board recognizes a USB device connected to a USB hub dedicated to a communication terminal and regards the USB device as a part;
Performing, by the communication terminal, verifying and attempting to verify a connection attempt of the USB device through self loading;
The USB board receiving a connection to the USB device from the communication terminal to open data files pre-stored in a memory unit mounted thereon;
Presenting the data files to the USB device on the opposite side such that the USB board corresponds to a USB hub located on one side of the upper surface of the USB board;
The communication terminal granting access to the data files;
Selecting the USB hub as a secondary USB hub replacing the dedicated USB hub for the communication terminal; And
The USB hub automatically accepting a USB port connection with a selected one of a plurality of external hardware devices,
The body part of the USB device is rotated by -45 to 180 degrees in confinement with the hinge part, and when rotated by 180 degrees, the socket part of the USB device is rotated in the same direction as the direction in which the socket part of the USB hub is located and the USB board is rotated. It is set on the upper surface, when rotated to -45 to 0 degrees, the socket portion of the USB device is characterized in that the reverse rotational movement in the opposite direction to the direction in which the socket portion of the USB hub is located is set out of the upper surface of the USB board ,
After the connection of the USB device is approved, the body portion of the USB device,
And providing the communication terminal with detailed part information on another memory unit having a storage space of the same or smaller size than the total storage amount occupied by the memory unit. Driving method.
The method according to claim 5, wherein after the detailed part information is provided,
And a method of designating the other memory unit mounted inside the body of the USB device as a sub storage space or a main storage space.
The method of claim 5, wherein
After a USB port connection between the selected one of the plurality of external hardware devices and the USB hub is made,
A third USB line wired in a socket portion of the USB device in which the USB hub is connected in parallel with the first USB line wired in the USB hub, the second USB line wired in the USB board and the second USB line; The method of claim 1, further comprising providing the communication terminal with detailed hardware information on the selected one of the plurality of external hardware devices.
KR1020130012267A 2013-02-04 2013-02-04 Usb memory stick device for combining a usb hub and drive method KR101314379B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008511916A (en) 2004-08-27 2008-04-17 イメイション・コーポレイション Memory device with hub function
KR20090009781U (en) * 2008-03-25 2009-09-30 정성환 The multi adapter for mobile phone
KR20110034757A (en) * 2009-09-29 2011-04-06 유어트론(주) Usb memory with usb hub
KR20120060396A (en) * 2010-12-02 2012-06-12 엘지전자 주식회사 Method and apparatus for protecting data of usb storage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008511916A (en) 2004-08-27 2008-04-17 イメイション・コーポレイション Memory device with hub function
KR20090009781U (en) * 2008-03-25 2009-09-30 정성환 The multi adapter for mobile phone
KR20110034757A (en) * 2009-09-29 2011-04-06 유어트론(주) Usb memory with usb hub
KR20120060396A (en) * 2010-12-02 2012-06-12 엘지전자 주식회사 Method and apparatus for protecting data of usb storage

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