CN201194107Y - USB socket with secret keeping function - Google Patents
USB socket with secret keeping function Download PDFInfo
- Publication number
- CN201194107Y CN201194107Y CNU2008200935235U CN200820093523U CN201194107Y CN 201194107 Y CN201194107 Y CN 201194107Y CN U2008200935235 U CNU2008200935235 U CN U2008200935235U CN 200820093523 U CN200820093523 U CN 200820093523U CN 201194107 Y CN201194107 Y CN 201194107Y
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- China
- Prior art keywords
- usb socket
- usb
- power supply
- model
- utility
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000006870 function Effects 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 230000001012 protector Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 1
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- Storage Device Security (AREA)
Abstract
A USB socket playing a security role is disclosed. The line joint inside the USB socket structure is formed by the positive and negative power supply exchange inside the USB socket structure. The USB socket also includes an overcurrent protector connected to the place between the power supply input terminal of the USB socket and the positive power supply interface inside the USB socket structure to prevent the insert of a universal USB socket into the novel USB socket and cause short circuit. The USB socket of the utility model has advantages of making up the easy leakage fault of the prior user information, suiting for the memory devices such as a mobile U disk, a mobile hard disk, an MP3, an MP4 and a mobile phone or the like with special design USB plug by changing the internal line of the prior USB socket.
Description
Technical field
The utility model is about a kind of computer peripheral interface, is meant a kind of USB socket 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 socket 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 socket, as shown in Figure 2, be existing Universal USB plug line assumption diagram, the Universal USB plug inside line joint corresponding with this Universal USB socket 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.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of subscriber data that prevents to reveal, and plays the USB socket of privacy functions.
The utility model solves the problems of the technologies described above by the following technical programs: a kind of USB socket that plays privacy functions, described USB socket circuit structure internal wiring joint is followed successively by negative power supply, data negative pole, data positive pole, cathode power supply.
This utility model can further be specially:
Also comprise an over-current protection device, be connected between the cathode power supply joint of the power input of described USB socket and USB socket circuit structure inside.
Described over-current protection device is that model is SMD1206P
*The automatic recovery protective tube of TF.
The advantage that the utility model plays the USB socket of privacy functions is: remedied the defective that existing subscriber data easily leaks, by change to existing USB socket internal wiring, can be suitable for the mobile USB flash disk that has through the USB plug of particular design, portable hard drive, memory devices such as MP3, MP4, mobile phone.
Description of drawings
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is existing Universal USB socket line assumption diagram.
Fig. 2 is existing Universal USB plug line assumption diagram.
Fig. 3 is the line assumption diagram that the utility model plays the USB socket of privacy functions.
Fig. 4 is the line assumption diagram that plays the USB plug that the USB socket of privacy functions is used with the utility model.
Embodiment
See also shown in Figure 3, it is the line assumption diagram that the utility model plays the USB socket of privacy functions, this novel USB socket will have the cathode power supply and the exchange of negative power supply structure of USB socket line construction now, and this USB socket circuit structure internal wiring joint is followed successively by negative power supply (GND), data negative pole (DATA-), data positive pole (DATA+), cathode power supply (VCC).
And in order to prevent that the Universal USB plug from inserting this novel USB socket; can cause short circuit; perhaps may electric current be above standard and damage movable storage device with Universal USB plug; so power input (+adopt an over-current protection device 1 5V) and between the cathode power supply joint of USB socket circuit structure inside; mainly be to prevent that electric current is excessive; influence the computer operate as normal, this over-current protection device 1 is SMD1206P for model
*The automatic recovery protective tube of TF.
See also Fig. 4, for playing the line assumption diagram of the USB plug (to call special-purpose USB plug in the following text) that the USB socket of privacy functions is used with the utility model.As corresponding with the internal wiring joint of this novel USB socket, this special use USB plug will have the cathode power supply and the exchange of negative power supply structure of USB plug line construction equally now, increase write-protect circuit and power supply bridge rectifier circuit simultaneously.Below will specifically narrate.
This special use USB plug 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.
This USB socket that plays privacy functions cooperates the principle of work of special-purpose USB plug as described below.
Resistance R 1 by write-protect circuit 10 and R2 discern Universal USB seat and USB seat of the present utility model and reach control and write requirement, and resistance R 1 and R2 use with need not being chosen on special mobile storer with special-purpose USB plug and the general mobile memory and realize the write-protect function respectively.
Because the power positive cathode of Universal USB seat and the utility model USB seat is reverse, and the power positive cathode of Universal USB plug and special-purpose USB plug also is reverse, use this power supply bridge rectifier circuit, special-purpose USB plug just can reach in Universal USB seat and the general purpose of the utility model USB seat.
The USB socket of using the utility model to play privacy functions cooperates special-purpose USB plug can realize following several mode of operation.
1, use special mobile storer with special-purpose USB plug have readable on the special purpose computer of USB socket of the present utility model, 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 the utility model USB seat.
2, use special mobile storer with special-purpose USB plug have readable on the special purpose computer of USB socket of the present utility model, 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 the utility model USB seat.
3, use the special mobile storer with special-purpose USB plug readable on common computer with Universal USB seat, can write.
Because the power positive cathode of Universal USB seat and the utility model USB seat is reverse, under this structure when this special-purpose USB plug connects the Universal USB seat, WPSW foot control system master IC enters read-write state.Simultaneously special-purpose USB plug 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 the utility model USB seat, also can not write.
Because the supply voltage on the utility model USB seat is reverse, so common mobile memory is inoperable at the USB of this utility model seat, thus just not readable yet, also can not write.
The USB socket that the utility model plays privacy functions is applicable to the mobile USB flash disk with special-purpose USB plug, portable hard drive, memory devices such as MP3, MP4, mobile phone.
Claims (3)
1. USB socket that plays privacy functions, it is characterized in that: described USB socket circuit structure internal wiring joint is followed successively by negative power supply, data negative pole, data positive pole, cathode power supply.
2. the USB socket that plays privacy functions as claimed in claim 1 is characterized in that: also comprise an over-current protection device, be connected between the cathode power supply joint of the power input of described USB socket and USB socket circuit structure inside.
3. the USB socket that plays privacy functions as claimed in claim 2 is characterized in that: described over-current protection device is that model is SMD1206P
*The automatic recovery protective tube of TF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200935235U CN201194107Y (en) | 2008-04-22 | 2008-04-22 | USB socket with secret keeping function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200935235U CN201194107Y (en) | 2008-04-22 | 2008-04-22 | USB socket with secret keeping function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201194107Y true CN201194107Y (en) | 2009-02-11 |
Family
ID=40393639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200935235U Expired - Fee Related CN201194107Y (en) | 2008-04-22 | 2008-04-22 | USB socket with secret keeping function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201194107Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801066A (en) * | 2011-05-23 | 2012-11-28 | 恒原百炼微电子科技(北京)有限公司 | Interface component capable of switching multiple pieces of low-power consumption USB (universal serial bus) equipment |
| CN102801064A (en) * | 2011-05-23 | 2012-11-28 | 恒原百炼微电子科技(北京)有限公司 | Interface module capable of supplying power to low-power-consumption equipment |
-
2008
- 2008-04-22 CN CNU2008200935235U patent/CN201194107Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102801066A (en) * | 2011-05-23 | 2012-11-28 | 恒原百炼微电子科技(北京)有限公司 | Interface component capable of switching multiple pieces of low-power consumption USB (universal serial bus) equipment |
| CN102801064A (en) * | 2011-05-23 | 2012-11-28 | 恒原百炼微电子科技(北京)有限公司 | Interface module capable of supplying power to low-power-consumption equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Yuwei Technology Co. Ltd. Assignor: Zhao Hui Contract record no.: 2010440020018 Denomination of utility model: USB socket with secret keeping function Granted publication date: 20090211 License type: Exclusive License Record date: 20100421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090211 Termination date: 20170422 |