CN101566979B - USB plug with privacy function - Google Patents
USB plug with privacy function Download PDFInfo
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- CN101566979B CN101566979B CN2008100666642A CN200810066664A CN101566979B CN 101566979 B CN101566979 B CN 101566979B CN 2008100666642 A CN2008100666642 A CN 2008100666642A CN 200810066664 A CN200810066664 A CN 200810066664A CN 101566979 B CN101566979 B CN 101566979B
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- 230000006870 function Effects 0.000 claims abstract description 25
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
The invention relates to a USB plug with privacy function, the anode power supply structure and the cathode power supply structure of the internal wiring of the prior USB plug circuit structure are exchanged to match with corresponding special USB sockets so as to realize the function of preventing data from breaching. The USB plug comprises a write protection circuit and a power supply bridge rectification circuit, thereby realizing that a special mobile memory with the USB plug can be read and not be written as well as can be read and not be written on a special computer with the special USBsocket, and the special mobile memory with the USB plug can be read and be written on a common computer with a general socket. The invention overcomes the defect of easy breaching of user data in the prior art, can be used into a computer USB socket with special design through the change of the internal wiring of the prior USB plug, and can also be used in a standard interface.
Description
Technical field
The invention relates to a kind of portable movable storage device, be meant a kind of USB plug that plays privacy functions especially.
Background technology
At present, computing machine peripheral equipment interface all is a standardized designs, and this is greatly convenient for users to use.Standard interface has also brought subscriber data to reveal easily when bringing great convenience for the user, defective such as easily is replicated.Anyone careless memory device with existing USB plug that uses, as USB flash disk, portable hard drive, MP3, MP4, mobile phone etc. just can duplicate user's data by the general USB interface of user computer.
As shown in Figure 1, it is existing Universal USB plug line assumption diagram, line joint is followed successively by cathode power supply (VCC), data negative pole (DATA-), data positive pole (DATA+), negative power supply (GND) in this plug, as shown in Figure 2, be existing Universal USB socket line assumption diagram, the Universal USB socket internal wiring joint corresponding with this Universal USB plug also is followed successively by cathode power supply (VCC), data negative pole (DATA-), data positive pole (DATA+), negative power supply (GND), and promptly the line joint in USB plug and the USB socket is one to one.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of subscriber data that prevents to reveal, and plays the USB plug of privacy functions.
The present invention solves the problems of the technologies described above by the following technical programs: 1, a kind of USB plug that plays privacy functions, it is characterized in that: described USB plug circuit structure internal wiring joint is followed successively by negative power supply, data negative pole, data positive pole, cathode power supply, when described secret USB plug was inserted the Universal USB socket, secret USB plug was electrically connected with the positive and negative electrode power supply reversed polarity of Universal USB socket; When described secret USB plug was inserted special-purpose USB socket, secret USB plug was electrically connected with the positive and negative electrode power supply same polarity of special-purpose USB socket, and the internal wiring joint of described secret USB plug is corresponding with described special-purpose USB socket.
This invention can further be specially:
Also comprise the write-protect circuit; described write-protect circuit is made up of resistance R 1 and R2; first end of resistance R 1 and R2 all is connected to the write-protect control pin; second end of resistance R 1 is connected to the cathode power supply of USB plug circuit structure, and second end of resistance R 2 is connected to the negative power supply of USB plug circuit structure.
By the control of this write-protect circuit, realize to use the special mobile storer with USB plug of the present invention readable on special purpose computer with special-purpose USB seat, can not write and readable, can write.
Also comprise the cathode power supply that is connected the USB plug circuit structure and the power supply bridge rectifier circuit between the negative power supply, described power supply bridge rectifier circuit comprises diode D1, D2, D3, D4, the negative electrode of the anode of diode D1 and diode D2 all is connected to the negative power supply of USB plug circuit structure 30, the anode of the negative electrode of diode D3 and diode D4 all is connected to the cathode power supply of USB plug circuit structure 30, and the negative electrode of the negative electrode of diode D1 and diode D4 is connected as the cathode power supply output terminal of power supply bridge rectifier circuit, the anode of the anode of diode D2 and diode D3 is connected as the negative power supply output terminal of power supply bridge rectifier circuit.
By using this power supply bridge rectifier circuit, use the special mobile storer with USB plug of the present invention readable on common computer with Universal USB seat, can write.
The advantage that the present invention plays the USB plug of privacy functions is: remedied the defective that existing subscriber data easily leaks, by change to existing USB plug internal wiring, can use through in the computer USB socket of particular design, also can on standardized interface, use simultaneously.And the USB plug that the present invention plays privacy functions can be used in mobile USB flash disk, and portable hard drive is on the memory devices such as MP3, MP4, mobile phone.
Description of drawings
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is existing Universal USB plug line assumption diagram.
Fig. 2 is existing Universal USB socket line assumption diagram.
Fig. 3 is the line assumption diagram that the present invention plays the USB plug of privacy functions.
Fig. 4 is the line assumption diagram that the USB plug that plays privacy functions with the present invention is used USB socket.
Embodiment
See also Fig. 3, for the present invention plays the line assumption diagram of the USB plug of privacy functions, the difference of this USB plug and existing USB plug is: 1, the power positive cathode of plug cord pipeline connector is exchanged; 2, write-protect circuit and power supply bridge rectifier circuit have been increased.Below will specifically narrate.
This USB plug that plays privacy functions comprises write-protect circuit 10, power supply bridge rectifier circuit 20, and USB plug circuit structure 30.
The feature and the mutual relationship of each ingredient are as follows:
Write-protect circuit 10: this write-protect circuit 10 is made up of resistance R 1 and R2; first end of resistance R 1 and R2 all is connected to write-protect control pin (WPSW); second end of resistance R 1 is connected to the cathode power supply (VCC) of USB plug circuit structure 30, and second end of resistance R 2 is connected to the negative power supply (GND) of USB plug circuit structure 30.
Power supply bridge rectifier circuit 20: between the cathode power supply of USB plug circuit structure 30 and negative power supply, increased the power supply bridge rectifier circuit of forming by four diode D1, D2, D3, D4 20.Concrete annexation is as follows: the negative electrode of the anode of diode D1 and diode D2 all is connected to the negative power supply of USB plug circuit structure 30, the anode of the negative electrode of diode D3 and diode D4 all is connected to the cathode power supply of USB plug circuit structure 30, the negative electrode of the negative electrode of diode D1 and diode D4 be connected as the cathode power supply output terminal of power supply bridge rectifier circuit 20 (+5V), the anode of diode D2 and the anode of diode D3 be connected as the negative power supply output terminal (AGND) of power supply bridge rectifier circuit 20.
USB plug circuit structure 30: be that these USB plug circuit structure 30 internal wiring joints are followed successively by negative power supply (GND), data negative pole (DATA-), data positive pole (DATA+), cathode power supply (VCC) with the cathode power supply and the exchange of negative power supply structure of existing USB plug line construction.
See also shown in Figure 4; it is the line assumption diagram that the USB plug that plays privacy functions with the present invention is used USB socket (to call special-purpose USB socket in the following text); as corresponding with the internal wiring joint of this special use USB plug circuit structure 30; this special use USB socket will have the cathode power supply and the exchange of negative power supply structure of USB socket line construction equally now; and go into this special use USB socket in order to prevent the Universal USB socket; can cause short circuit; perhaps may electric current be above standard and damage USB flash disk; so power input (+adopt an over-current protection device 5V) and between the cathode power supply joint of USB socket; mainly be to prevent that electric current is excessive; influence the computer operate as normal, this over-current protection device is that model is SMD1206P
*The automatic recovery protective tube of TF.
This principle of work of USB plug that plays privacy functions is as described below.
Resistance R 1 by write-protect circuit 10 and R2 discern the Universal USB seat and cooperate special-purpose USB seat of the present invention to reach control and write requirement, and resistance R 1 and R2 use with need not being chosen on special mobile storer with USB plug that the present invention plays privacy functions and the general mobile memory and realize the write-protect function respectively.
Because the power positive cathode of Universal USB seat and special-purpose USB seat is reverse, and Universal USB plug and the present invention play the power positive cathode of the USB plug of privacy functions also is reverse, use this power supply bridge rectifier circuit, the USB plug that the present invention plays privacy functions just can reach in Universal USB seat and the general purpose of special-purpose USB seat.
The USB plug of using the present invention to play privacy functions can realize following several mode of operation.
1, use the special mobile storer with USB plug of the present invention readable on special purpose computer with special-purpose USB seat, can not write.
By the resistance R in the write-protect circuit 10 1, R2, realize that the main IC (integrated circuit) of this special mobile storer of WPSW foot control system of special mobile storer realizes the write-protect function on special-purpose USB seat.
2, use the special mobile storer with USB plug of the present invention readable on special purpose computer with special-purpose USB seat, can write.
By adjusting resistance R 1, the R2 in the write-protect circuit 10, by selecting not use resistance R 1, R2 to realize cancellation write-protect function, so special mobile storer readable writing on special-purpose USB seat.
3, use the special mobile storer with USB plug of the present invention readable on common computer with Universal USB seat, can write.
Because the power positive cathode of Universal USB seat and special-purpose USB seat is reverse, under this structure when USB plug of the present invention connects the Universal USB seat, WPSW foot control system master IC enters read-write state.Simultaneously USB plug of the present invention has the power rectifier structure, can realize that forward and reverse voltage can work, thus can be implemented in the Universal USB seat readable, can write.
4, use the common mobile memory with Universal USB plug not readable on special purpose computer with special-purpose USB seat, also can not write.
Because the supply voltage on the special-purpose USB seat is reverse, so common mobile memory is inoperable at special-purpose USB seat, thus just not readable yet, also can not write.
The USB plug that the present invention plays privacy functions can be used in mobile USB flash disk, and portable hard drive is on the memory devices such as MP3, MP4, mobile phone.
Claims (3)
1. USB plug that plays privacy functions, it is characterized in that: described USB plug circuit structure internal wiring joint is followed successively by negative power supply, data negative pole, data positive pole, cathode power supply, when described secret USB plug was inserted the Universal USB socket, secret USB plug was electrically connected with the positive and negative electrode power supply reversed polarity of Universal USB socket; When described secret USB plug was inserted special-purpose USB socket, secret USB plug was electrically connected with the positive and negative electrode power supply same polarity of special-purpose USB socket, and the internal wiring joint of described secret USB plug is corresponding with described special-purpose USB socket.
2. the USB plug that plays privacy functions as claimed in claim 1; it is characterized in that: also comprise the write-protect circuit; described write-protect circuit is made up of resistance R 1 and R2; first end of resistance R 1 and R2 all is connected to the write-protect control pin; second end of resistance R 1 is connected to the cathode power supply of USB plug circuit structure, and second end of resistance R 2 is connected to the negative power supply of USB plug circuit structure.
3. as claim 1 or the 2 described USB plug that play privacy functions, it is characterized in that: also comprise the cathode power supply that is connected the USB plug circuit structure and the power supply bridge rectifier circuit between the negative power supply, described power supply bridge rectifier circuit comprises diode D1, D2, D3, D4, the negative electrode of the anode of diode D1 and diode D2 all is connected to the negative power supply of USB plug circuit structure, the anode of the negative electrode of diode D3 and diode D4 all is connected to the cathode power supply of USB plug circuit structure, and the negative electrode of the negative electrode of diode D1 and diode D4 is connected as the cathode power supply output terminal of power supply bridge rectifier circuit, the anode of the anode of diode D2 and diode D3 is connected as the negative power supply output terminal of power supply bridge rectifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100666642A CN101566979B (en) | 2008-04-22 | 2008-04-22 | USB plug with privacy function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100666642A CN101566979B (en) | 2008-04-22 | 2008-04-22 | USB plug with privacy function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101566979A CN101566979A (en) | 2009-10-28 |
| CN101566979B true CN101566979B (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100666642A Expired - Fee Related CN101566979B (en) | 2008-04-22 | 2008-04-22 | USB plug with privacy function |
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| Country | Link |
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| CN (1) | CN101566979B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105138483B (en) * | 2015-07-30 | 2017-12-19 | 浪潮软件集团有限公司 | USB interface expansion device and communication method thereof |
| CN114678750A (en) * | 2022-03-10 | 2022-06-28 | 深圳市乐凡信息科技有限公司 | Data transmission protection method based on data line and data line |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574541A (en) * | 2003-06-11 | 2005-02-02 | 捷讯研究有限公司 | Universal serial bus (USB) charger for a mobile device |
| CN1722541A (en) * | 2004-07-16 | 2006-01-18 | 佛山市顺德区顺达电脑厂有限公司 | Universal serial bus connector |
| EP1691252A1 (en) * | 2005-02-15 | 2006-08-16 | Research In Motion Limited | Systems and methods for charging a chargeable usb device |
| CN2814761Y (en) * | 2005-05-12 | 2006-09-06 | 任明磊 | Electrodeless electric power interface |
| CN101089997A (en) * | 2006-06-12 | 2007-12-19 | 景曙光 | Storage circuit |
| CN201194111Y (en) * | 2008-04-22 | 2009-02-11 | 赵辉 | USB plug with secret keeping function |
-
2008
- 2008-04-22 CN CN2008100666642A patent/CN101566979B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1574541A (en) * | 2003-06-11 | 2005-02-02 | 捷讯研究有限公司 | Universal serial bus (USB) charger for a mobile device |
| CN1722541A (en) * | 2004-07-16 | 2006-01-18 | 佛山市顺德区顺达电脑厂有限公司 | Universal serial bus connector |
| EP1691252A1 (en) * | 2005-02-15 | 2006-08-16 | Research In Motion Limited | Systems and methods for charging a chargeable usb device |
| CN2814761Y (en) * | 2005-05-12 | 2006-09-06 | 任明磊 | Electrodeless electric power interface |
| CN101089997A (en) * | 2006-06-12 | 2007-12-19 | 景曙光 | Storage circuit |
| CN201194111Y (en) * | 2008-04-22 | 2009-02-11 | 赵辉 | USB plug with secret keeping function |
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| Publication number | Publication date |
|---|---|
| CN101566979A (en) | 2009-10-28 |
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20091028 Assignee: Shenzhen Yuwei Technology Co. Ltd. Assignor: Zhao Hui Contract record no.: 2013440020127 Denomination of invention: USB plug with privacy function Granted publication date: 20101215 License type: Exclusive License Record date: 20130426 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20170221 Address after: 518000 Guangdong city of Shenzhen province Nanshan District science and technology No. two Shenzhen Software Park 13 floor 501 Patentee after: Shenzhen Yuwei Technology Co. Ltd. Address before: 518000 Guangdong city of Shenzhen province Nanshan District Xili town Lu Wenguang Tea Light Industrial District 17 building 6-8 Patentee before: Zhao Hui |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20200422 |
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| CF01 | Termination of patent right due to non-payment of annual fee |