CN201159892Y - USB concentrator with choice current margin and overflowing protection function - Google Patents
USB concentrator with choice current margin and overflowing protection function Download PDFInfo
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- CN201159892Y CN201159892Y CNU2008200037684U CN200820003768U CN201159892Y CN 201159892 Y CN201159892 Y CN 201159892Y CN U2008200037684 U CNU2008200037684 U CN U2008200037684U CN 200820003768 U CN200820003768 U CN 200820003768U CN 201159892 Y CN201159892 Y CN 201159892Y
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- 238000011084 recovery Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
Disclosed is a USB concentrator having the selectable working current range and overflow protection function, namely, each channel of the USB concentrator is provided with a plurality of self-recovery safety wires for facilitating users to select the current range, and the overflow protection to the USB device can be completed automatically based on the characteristics of the self-recovery safety wires. The USB concentrator adopts the technical proposal that: the USB concentrator having the selectable working current range and overflow protection function comprises a USB concentrator module for extending a bus into at least two extended ports, the bus and extended ports, and is characterized in that the concentrator is also equipped with a current limiting and selecting module for limiting the magnitude of current and selecting the range of working current, and the current limiting and selecting module is connected on a VBus signal line or a GND signal line of the extended ports in series.
Description
Technical field
The utility model relates to usb hub, and particularly a kind of current margin optionally has the usb hub of overcurrent protection function, belongs to information security field.
Background technology
USB (universal serial bus) (Universal Serial Bus is called for short USB) is a kind of new interface technology that is applied in the computing machine communication field.These several years, along with popularizing of the PC of a large amount of support USB, the standard interface that USB progressively becomes computing machine was trend of the times.
Usb hub provides two main functions, and the one, repeater (Repeater): be used for the data broadcasting that will main frame passes the down USB device to all functions port, the data that the USB device is uploaded are repeated on upstream port and deliver to main frame then; Another is to connect and the detection that disconnects: hub must be done detection to the hot-swappable of USB device, and reports to main frame to reach the function of the hot plug and play of main frame.
The prior USB hub is the port expansion, does not consider the working current of USB device.General restraint of labour upper current limit is 500mA, also is industry standard.This restriction has two kinds, and the one, the restriction of the output USB interface of computing machine, the 2nd, the quality expanding USB interface of usb hub preferably is also restricted.But because the versatility of usb hub not less than the electric current restriction of 500mA, is used for protecting the work safety of USB device.
At present in the use of usb hub, substantially all be directly to provide electric current to usb hub with external power supply, but because of the required electric current of each Extended Capabilities Port of usb hub is not quite similar, for example working as usb hub starts at that moment, the needed electric current of some USB device can not start when surpassing the current value of general normal setting, or other are operated improperly and then influence usb hub, make the USB device connected and may will burn out or shorten its serviceable life, more and then have and give off sparks or the generation of the hazards that electric wire cocks off, and if USB device is long-time the use, can be because of quality problems or device aging, overcurrent work appears, USB device is burnt out, may cause that individually main frame damages, and cause safety problem.So when USB device quantity that usb hub connected for a long time, during use the selectivity of range of current and the security after overcurrent appears in USB device are seemed particularly important.
The utility model content
In order to solve above-mentioned the deficiencies in the prior art; the utility model proposes the usb hub that a kind of current margin optionally has overcurrent protection function; each passage that is usb hub is provided with a plurality of from recovering insurance; can make things convenient for the user that range of current is selected; and, automatically USB device is finished overcurrent protection by from the characteristic of recovering insurance.
The technical solution of the utility model is: the USB device current margin optionally has the usb hub of overcurrent protection function; comprise the usb hub module, bus and the Extended Capabilities Port that are used for bus is expanded at least two Extended Capabilities Port; the electric current restriction that it is characterized in that also being provided with the size that is used to limit electric current and the scope of working current is selected and select module, described electric current restriction and select module to be serially connected with on the VBus signal wire or GND signal wire of Extended Capabilities Port.
Described electric current restriction and selection module comprise that electric current is from recovering insurance unit and restriction current selecting unit, described electric current comprises at least two from recovering insurance from recovering the insurance unit, when described restriction current selecting unit and one from recovering after insurance is connected, described USB device is just worked from recovering to insure under the range of current that can bear the described of place Extended Capabilities Port, if the USB device electric current is excessive, surpass the described working current upper limit of insuring from recovery, described from recovering insurance meeting automatic cutout connection.
Described electric current is from recovering the insurance unit after described usb hub powers on once more, and the described insurance of recovery certainly reverts to connection status automatically.
Described restriction current selecting unit is button, multidigit conversion knob, numerical key selection one of audio-switch, pushing switch and electric-controlled switch.
Described usb hub module is a USB HUB chip.
Effect of the present utility model is: compared with prior art; the utility model proposes the usb hub that a kind of current margin optionally has overcurrent protection function; after connecting USB device; select the working current upper limit of USB device by selector button; in case this USB device breaks down; to show as working current strengthens; usb hub can cut off the working power of this USB device automatically; can forbid that this USB device works on; avoid heating; burn out; even the naked light burning, this usb hub is at the USB device of work in 24 hours; main frame and working environment have the protection of security more.
Description of drawings
Fig. 1 is the structured flowchart that current margin optionally has the usb hub of overcurrent protection function;
Fig. 2 is the circuit theory diagrams that current margin optionally has the usb hub of overcurrent protection function.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as to qualification of the present utility model.
The usb hub that a kind of current margin that the utility model provides optionally has overcurrent protection function comprises: the usb hub module 101 that is used for bus is expanded at least two Extended Capabilities Port; and being used to limit the size of electric current and electric current restriction and the selection module 102 that the scope of working current is selected, electric current restriction and selection module are serially connected with on the VBus signal wire or GND signal wire of Extended Capabilities Port.
Electric current restriction and selection module 102 comprise that electric current is from recovering insurance unit 103 and restriction current selecting unit 104, electric current can be at least two from recovering insurance from recovering insurance unit 103, restriction current selecting unit 104 can be multidigit conversion knob, after multidigit is changed knob and oneself a recovery insurance is connected, USB device is just worked under the range of current that the insurance of recovery certainly of place Extended Capabilities Port can be born, if the USB device electric current is excessive, surpass from the working current upper limit of recovering insurance, recovering insurance certainly can connect in automatic cutout.
Electric current recovers insurance unit 103 certainly and is used to limit the Extended Capabilities Port size of current, after the size of electric current surpasses the range of current that the recovery insurance can bear certainly, recovers insurance meeting automatic cutout certainly.
Electric current is from recovering the insurance unit after described usb hub powers on once more, and the described insurance of recovery certainly reverts to connection status automatically.
Make for macromolecule overflow protecting element system adds conducting particles by macromolecular material from the principle of recovering insurance.Its ultimate principle is a kind of balance of energy: when electric current flow through element, because current drain power produces heat, the heat that an is produced part was divided to be dispersed into and gone in the environment, and is a part of then increased the temperature of macromolecular material.Under the corresponding work electric current, heat that element produces and the heat that distributes reach balance, and electric current can normally pass through.When excessive electric current produces; element sharply produces heat and can not in time distribute; cause element inner macromolecule material temperature to rise; when temperature reaches the material crystalline melting temperature; macromolecular material sharply expands, and the conductive path that blocking-up is made up of conducting particles causes resistance value to rise rapidly; limit big electric current and passed through, thereby played the effect of overcurrent protection.After fault is got rid of, recover certainly to insure crystallisation by cooling again, volumetric contraction, conducting particles forms conductive path again, recovers insurance certainly and reverts to low resistive state, thereby finish the protection to circuit, need not manually change.
Restriction current selecting unit 104 is used for according to the required size of current of USB device that connects on the described usb hub Extended Capabilities Port range of current of described usb hub Extended Capabilities Port being selected.
The restriction current selecting unit can be button, multidigit conversion knob, numerical key selection, audio-switch, pushing switch, electric-controlled switch.
The usb hub module is a USB HUB chip.
Hub (HUB) is the important tool that network is managed concentratedly, and as the trunk of tree, it is the Rendezvous Point of each branch.The HUB chip not only can transfer USB interface to two USB interface, can also transfer plural USB interface to, can transfer four USB interface to such as the HUB chip.
The user is when using USB device; after usb hub is connected; the user can select the working current upper limit of USB device by the multidigit switch; if faults such as overcurrent appear in USB device; working current surpasses the working current upper limit; from recovering insurance meeting automatic cutout; guarantee that USB device can not avoid heating, burn out even situation such as naked light burning; when the user used in next time; on the recovery insurance can be dynamically connected certainly; guarantee that the user continues normally to use USB device, thus the safety of protection main frame and working environment.
USB device comprises information safety devices (USB Key), digital camera, scanner, joystick, tape and floppy drive, vision facilities, printer, keyboard, mouse etc.
Main frame can be desktop computer, notebook computer, server or special machine.
The usb hub that overcurrent protection function optionally is provided for a kind of current margin of more clearly describing the utility model and providing; provide the preferred circuit figure of a present embodiment below; as shown in Figure 2; hub can be the usb hub that bus is expanded at least two Extended Capabilities Port; present embodiment selects for use one to expand four hub AU9254A21 chip; what the USB_DP of AU9254A21 chip was connected with USB_DM is total USB interface of this hub; USB1_DP and USB1_DM; USB2_DP and USB2_DM; USB3_DP and USB3_DM; USB4_DP and USB4_DM are connected 4 expanding USB interface of this hub respectively; connect one on the VBus signal wire of the USB expansion interface of this hub respectively from recovering insurance circuit; specifically constitute from recovering insurance and multidigit switch from recovering insurance circuit by a plurality of; each is from recovering the upper current limit difference that insurance can bear; as the insurance circuit of recovery certainly " 10mA; 15mA; 20mA; 25mA; 30mA; 35mA " etc. arranged at extended channel 1; the insurance circuit of recovery certainly at extended channel 2 has " 40mA; 50mA; 60mA; 70mA; 80mA; 90mA "; the insurance circuit of recovery certainly " 100mA; 120mA; 140mA; 160mA; 180mA; 200mA " at extended channel 3; the insurance circuit of recovery certainly " 225mA; 250mA; 275mA; 300mA; 350mA; 400mA " at extended channel 4; user by selecting switch s1; s2; s3; s4 selects corresponding range of current; form path behind the switch closure; realize the selection on the electric current; when electric current surpasses upper current limit with automatic cutout, thereby the protection USB device; the safety of main frame and working environment.
Above-described embodiment is a more preferably embodiment of the utility model, and common variation and replacement that those skilled in the art carries out in the technical solutions of the utility model scope all should be included in the protection domain of the present utility model.
Claims (5)
1, a kind of current margin optionally has the usb hub of overcurrent protection function; comprise the usb hub module, bus and the Extended Capabilities Port that are used for bus is expanded at least two Extended Capabilities Port; the electric current restriction that it is characterized in that also being provided with the size that is used to limit electric current and the scope of working current is selected and select module, described electric current restriction and select module to be serially connected with on the VBus signal wire or GND signal wire of Extended Capabilities Port.
2; current margin according to claim 1 optionally has the usb hub of overcurrent protection function; it is characterized in that described electric current restriction and select module to comprise that electric current is from recovering insurance unit and restriction current selecting unit; described electric current comprises at least two from recovering insurance from recovering the insurance unit; when described restriction current selecting unit and one from recovering after insurance is connected; described USB device is just worked from recovering to insure in the range of current that can bear the described of place Extended Capabilities Port; if the USB device electric current is excessive; surpass the described working current upper limit of insuring from recovery, described from recovering insurance meeting automatic cutout connection.
3, current margin according to claim 2 optionally has the usb hub of overcurrent protection function, it is characterized in that described electric current from recovering the insurance unit after described usb hub powers on once more, and the described insurance of recovery certainly reverts to connection status automatically.
4, current margin according to claim 2 optionally has the usb hub of overcurrent protection function, it is characterized in that described restriction current selecting unit is single button, multidigit conversion knob, numerical key selection one of audio-switch, pushing switch and electric-controlled switch.
5, current margin according to claim 1 optionally has the usb hub of overcurrent protection function, it is characterized in that described usb hub module is a USB HUB chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200037684U CN201159892Y (en) | 2007-11-23 | 2008-02-20 | USB concentrator with choice current margin and overflowing protection function |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200720190334.5 | 2007-11-23 | ||
| CN200720190334 | 2007-11-23 | ||
| CNU2008200037684U CN201159892Y (en) | 2007-11-23 | 2008-02-20 | USB concentrator with choice current margin and overflowing protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201159892Y true CN201159892Y (en) | 2008-12-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200037684U Expired - Lifetime CN201159892Y (en) | 2007-11-23 | 2008-02-20 | USB concentrator with choice current margin and overflowing protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201159892Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515923A (en) * | 2012-06-19 | 2014-01-15 | 三星电子株式会社 | Interface unit having overcurrent and overvoltage protection device |
| CN104111910A (en) * | 2014-07-18 | 2014-10-22 | 山东超越数控电子有限公司 | USB interface overload automatic switching method |
| CN108886247A (en) * | 2016-03-15 | 2018-11-23 | 株式会社自动网络技术研究所 | power supply device |
-
2008
- 2008-02-20 CN CNU2008200037684U patent/CN201159892Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103515923A (en) * | 2012-06-19 | 2014-01-15 | 三星电子株式会社 | Interface unit having overcurrent and overvoltage protection device |
| CN103515923B (en) * | 2012-06-19 | 2018-10-19 | 惠普打印机韩国有限公司 | Interface unit with overcurrent and overvoltage protecting device |
| CN104111910A (en) * | 2014-07-18 | 2014-10-22 | 山东超越数控电子有限公司 | USB interface overload automatic switching method |
| CN108886247A (en) * | 2016-03-15 | 2018-11-23 | 株式会社自动网络技术研究所 | power supply device |
| CN108886247B (en) * | 2016-03-15 | 2019-12-31 | 株式会社自动网络技术研究所 | power supply unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: FEITIAN TECHNOLOGIES CO., LTD. Free format text: FORMER NAME: BEIJING FEITIAN CHENGXIN TECHNOLOGIES CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 100085 Beijing city Haidian District Xueqing Road No. 9 Ebizal building B block 17 layer Patentee after: Feitian Technologies Co., Ltd. Address before: 100083, Haidian District, Xueyuan Road, No. 40 research, 7 floor, 5 floor, Beijing Patentee before: Beijing Feitian Chengxin Science & Technology Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081203 |
|
| CX01 | Expiry of patent term |