CN202523058U - USB intelligent sharing device - Google Patents
USB intelligent sharing device Download PDFInfo
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- CN202523058U CN202523058U CN2012200612273U CN201220061227U CN202523058U CN 202523058 U CN202523058 U CN 202523058U CN 2012200612273 U CN2012200612273 U CN 2012200612273U CN 201220061227 U CN201220061227 U CN 201220061227U CN 202523058 U CN202523058 U CN 202523058U
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Abstract
The utility model provides a USB (universal serial bus) intelligent sharing device, relating to the field of sharing devices of computer peripheral equipment. The USB intelligent sharing device can support two computers to share one piece of USB external equipment and mainly comprises a power supply module, a voltage comparison circuit, a trigger control circuit, a channel switching circuit and the like. If a prior input port access to one computer, the computer can be automatically connected with the USB external equipment and uses the USB external equipment; and if the prior input port is disconnected with the computer, and the other computer accessed by another input port can automatically recover connection and uses the USB external equipment. According to the USB intelligent sharing device, external power supplies are not required, the intelligent switching function is particularly suitable for occasions such as multimedia classrooms, and the intelligent switching between desktop computers and notebook computers is realized.
Description
Affiliated technical field
The utility model relates to a kind of computer peripheral shared device field, belongs to USB external equipment (for example electronic whiteboard, printer, scanner or memory storage) switch.Can support two computing machines to share a USB external equipment, be particluarly suitable for multi-media classroom and use.
Background technology
The development of Along with computer technology, computing machine USB external equipment kind is more and more, and a large amount of uses of these equipment have influenced modern every field.Under the office of changing in modern times and teaching environment; Because the problem of place and cost etc.; Can not give these costs such as every computer configuration a USB external equipment, particularly electronic whiteboard, printer, scanner, plotting apparatus, all-in-one multifunctional machine expensive USB external equipment.In order to solve the problem of USB external equipment resource sharing, improve plant factor, developed USB external equipment shared device.At present, known USB external equipment shared device has two kinds, manual mechanical switch control type and computer software control type.The manual mechanical switch control type needs manual work to press switching push button, and install on inconvenient backstage, has limited the installation site, troublesome poeration; The computer software control type needs to install earlier special-purpose software, carries out blocked operation after opening this software interface again, and complicated operation, cost are also high, because also there is the incompatible risk of software in the difference of operation system of computer.
Summary of the invention
Can not realize intelligent automatic switching in order to overcome prior USB external equipment shared device; Complicated operation; Problems such as cost height; The utility model provides a kind of USB external equipment shared device that can intelligence switches, as long as computing machine usb data signal is inserted in the preferential input port of first computing machine, then automatically the computing machine usb data signal of the preferential input port of first computing machine is switched and is connected to the USB delivery outlet; The computing machine usb data signal of the second computing machine input port of automatic cutout simultaneously is connected with the USB delivery outlet, and the computing machine that only allows this moment the preferential input port of first computing machine to connect uses the USB external equipment.Cutting off the preferential input port of first computing machine is connected with the usb data signal of computing machine; Then the computing machine usb data signal of the second computing machine input port recovers to be connected with the USB delivery outlet automatically, and the computing machine that at this moment is connected with the second computing machine input port can use the USB external equipment.So just can realize that a certain computing machine in two computing machines preferentially uses intelligence between USB external equipment, two computing machines to switch and the purpose of USB external equipment resource sharing.
The utility model solves the technical scheme that its technical matters adopted: it is as shown in Figure 1 to design its ultimate principle frame diagram of an intelligence control circuit; Mainly comprise power module, voltage comparator circuit, trigger control circuit and channel switching circuit; The USB power supply signal of the USB power supply signal of the preferential input port of first computing machine and the second computing machine input port is connected to power module and voltage comparator circuit; Output+5V is connected to an end and the USB delivery outlet power supply signal end of R9 in 4,8 pins and the channel switching circuit of the NE555 integrated circuit U2 in the trigger control circuit; 2,6 pins of NE555 integrated circuit U2 in the comparison signal Vi of voltage comparator circuit output and the trigger control circuit are connected; 1 pin of FSUSB30 integrated circuit U3 in the control signal Vo afferent pathway commutation circuit of trigger control circuit output; Usb data signal D1+, the D1-of the usb data signal D2+ of the preferential input port of first computing machine, D2-and the second computing machine input port is connected to the FSUSB integrated circuit U3 in the channel switching circuit, switches the data signal interfaces that the data-signal D+, the D-that export are connected to the USB delivery outlet through U3.Realize switching each other between two computing machines through control circuit, support two computing machines to share a USB external equipment.Wherein power module is by the power supply signal in the usb data signal of the power supply signal in the usb data signal of the preferential input port of first computing machine, the second computing machine input port, electric capacity and the current supply circuit that diode is formed; Power module is accomplished providing of the utility model each several part circuit voltage; When the usb data signal is inserted in the preferential input port of first computing machine or the second computing machine input port; Power supply signal in the usb data signal can both be supplied power for entire circuit, dispense with outer connecting power.As voltage comparison signal, pass to trigger control circuit with the power supply signal in the computing machine usb data signal of power supply signal in the computing machine usb data signal of first computing machine preferential input port access and the access of the second computing machine input port through voltage comparator circuit output high-low level signal; Be transported to channel switching circuit through trigger control circuit output reset signal or trigger pip; Channel switching circuit has comprised the dual-port high speed USB double-point double-throw switch integrated circuit of a low-power consumption, receive reset signal or trigger pip after, realize quick selection and switching between binary channels.As long as computing machine usb data signal is inserted in the preferential input port of first computing machine; Voltage comparator circuit output high level; Trigger control circuit output trigger pip; Channel switching circuit then automatically interruption U SB delivery outlet is connected with the data of the second computing machine input port, and switch and be connected to the preferential input port of first computing machine, the computing machine that permission at this moment is connected with the preferential input port of first computing machine preferentially uses the USB external equipment; When the preferential input port of first computing machine does not have computing machine USB data-signal to insert; The voltage comparator circuit output low level; Trigger control circuit output reset signal; Channel switching circuit then recovers the USB delivery outlet automatically and is connected with the data of the second computing machine input port, and breaks off and being connected of the preferential input port of first computing machine, and allows the computing machine use USB external equipment that is connected with the second computing machine input port this moment.
The beneficial effect of the utility model is to support two computing machines to share 1 USB external equipment, adopts simple electronic circuit to realize two intelligent automatic switchings that computing machine is connected with the USB external equipment; Adopted the IC chip of low-power dual-port high speed USB double-point double-throw switch that its volume is reduced, energy consumption reduces.The utility model is simple in structure, easy and simple to handle, profile is small and exquisite, with low cost, usable range is wide, be easy to accepted by the client; Its intelligent automatic switching is particularly suitable for multi-media classroom, realizes that the automatic switchover between desktop computer computer and the notebook computer is used, and the teacher can be switched more efficiently to use at school the time and carried the notebook computer teaching.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is the ultimate principle frame diagram of the utility model.
Fig. 2 is the utility model power module part schematic diagram.
Fig. 3 is the utility model voltage comparator circuit part schematic diagram.
Fig. 4 is the utility model trigger control circuit part schematic diagram.
Fig. 5 is the utility model channel switching circuit part schematic diagram.
Fig. 6 is the embodiment contour structures synoptic diagram of the utility model.
Fig. 7 is that the embodiment of the utility model uses the connection synoptic diagram.
1.USB delivery outlet among the figure, the 2. preferential input port of first computing machine, 3. second computing machine input port, the 4. casing.
Embodiment
In Fig. 1, simply expressed the course of work of the utility model; As can be seen from the figure, the utility model mainly is made up of the preferential input port of first computing machine (2), the second computing machine input port (3), power module, voltage comparator circuit, trigger control circuit, channel switching circuit and USB delivery outlet parts such as (1).The preferential input port of first computing machine (2) is the USB port that is connected with computing machine usb data signal with the second computing machine input port (3); Power module is by the power supply signal in the usb data signal of the power supply signal in the usb data signal of the preferential input port of first computing machine (2), the second computing machine input port (3), electric capacity and the current supply circuit that diode is formed; Voltage comparator circuit, trigger control circuit, channel switching circuit have been formed intelligent commutation circuit part; USB delivery outlet (1) is the USB port that is connected with USB external equipment usb data signal.
In Fig. 2, the power module by diode D1, electrochemical capacitor E1, capacitor C 4～C5 have formed the utility model is other each several part circuit supplies.When computing machine usb data signal was inserted in the second computing machine input port (3), no matter whether the preferential input port of first computing machine (2) connected computing machine usb data signal, and all power supply signal+the 5V by second computing machine input port (3) the usb data signal provides WV; When the second computing machine input port (3) and computing machine usb data signal break off when being connected, WV is provided by the power supply signal VCC2 of the preferential input port of first computing machine (2) usb data signal; Dispense with outer connecting power.
In Fig. 3, formed voltage comparator circuit than integrated circuit U2A by resistance R 1, R3, R4, R6, R7, R10 and voltage ratio.Power supply signal VCC2 in the computing machine usb data signal is input to the in-phase end of U2A through resistance R 3, R4, and+5V is input to the end of oppisite phase of U2A through divider resistance R6, R7.In-phase end and end of oppisite phase voltage signal compare, and when the preferential input port of first computing machine (2) was connected with computing machine usb data signal, U2A in-phase end input voltage was greater than the end of oppisite phase input voltage, and 1 output Vi is a high level through resistance R; When the preferential input port of first computing machine (2) did not have computing machine usb data signal, U2A in-phase end input voltage was less than the end of oppisite phase input voltage, and 1 output Vi is a low level through resistance R.The high-low level signal Vi of voltage comparator circuit output passes to trigger control circuit.
In Fig. 4, formed trigger control circuit by capacitor C 1 and 555 timer U2.2 pin that the high-low level signal Vi of voltage comparator circuit output is input to NE555 timer U2 trigger input end and 6 pin threshold value ends, the 3 pin output terminals output signal Vo of NE555 timer U2.When Vi was low level, trigger control circuit output signal Vo was a reset signal; When Vi was high level, trigger control circuit output signal Vo was a trigger pip; Reset signal or trigger pip are passed to channel switching circuit.
In Fig. 5, formed channel switching circuit by resistance R 8～R9, capacitor C 3, high speed USB double-point double-throw switch integrated circuit U3, USB delivery outlet (1) USB1, the preferential input port of first computing machine (2) USB3, second computing machine input port (3) USB2.Trigger control circuit output signal Vo passes to 1 pin of high speed USB double-point double-throw switch integrated circuit U3 and selects input end; When trigger control circuit output signal Vo is trigger pip; The high speed USB double-point double-throw switch switches to D2+, D2-; This moment D+ and D2+, D-and D2-conducting, D+ and D1+, D-and D1-break off, and USB delivery outlet (1) USB1 is connected with the preferential input port of first computing machine (2) USB3; Break off with second computing machine input port (3) USB2, the USB external equipment is used by the computing machine that the preferential input port of first computing machine (2) connects; When trigger control circuit output signal Vo is reset signal; The high speed USB double-point double-throw switch switches to D1+, D1-; This moment D+ and D1+, D-and D1-conducting, D+ and D2+, D-and D2-break off, and USB delivery outlet (1) USB1 and the preferential input port of first computing machine (2) USB3 break off; Recover to be connected with second computing machine input port (3) USB2, this moment, the USB external equipment was used by the computing machine that the second computing machine input port (3) connects.
As shown in Figure 6, the utility model embodiment contour structures synoptic diagram, each assembly of the utility model circuit all are welded on the PCB printed panel, and the PCB printed panel is placed in the casing (4).Casing (4) is exposed in USB delivery outlet (1), the preferential input port of first computing machine (2), the second computing machine input port (3).The present embodiment profile is small and exquisite, simple in structure, easy to use.
In Fig. 7, the utility model cooperates the multimedia central controller to use and connects synoptic diagram, and the second computing machine input port (3) is connected to second computing machine through the USB connecting line; The preferential input port of first computing machine (2) is connected to the USB external equipment control delivery outlet of central controller; USB delivery outlet (1) is connected to the USB external equipment.When the USB of multimedia central controller external equipment control input port is connected to computing machine 1; The signal that the utility model system can interrupt between the second computing machine input port (3) and the USB delivery outlet (1) connects; And automatically the computing machine usb signal of the preferential input port of first computing machine (2) is switched and be connected to USB delivery outlet (1), this computer-chronograph 1 uses USB external equipment; When the USB of multimedia central controller external equipment control input end mouth and computing machine 1 were in not-connected status, then the second computing machine input port (3) was connected with data-signal between the USB delivery outlet (1), and this moment, second computing machine used the USB external equipment.In multi-media classroom, computing machine 1 can be the notebook computer that the teacher carries, and second computing machine is the desktop computer computer in the classroom.Accomplish the intelligent handoff functionality that the USB external equipment uses through the utility model, promptly accomplished the resource sharing of USB external equipment.The usb data signal that only need cut off or connect the preferential input port of first computing machine (2) can be realized the switching of two intercomputers reaching the purpose of sharing USB external equipment resource.
Claims (3)
1. USB intelligence shared device; Form by USB delivery outlet, the preferential input port of first computing machine, the second computing machine input port and casing; It is characterized in that: comprise power module, voltage comparator circuit, trigger control circuit and channel switching circuit; The USB power supply signal of the USB power supply signal of the preferential input port of first computing machine and the second computing machine input port is connected to power module and voltage comparator circuit; Output+5V is connected to an end and the USB delivery outlet power supply signal end of resistance R 9 in 4,8 pins and the channel switching circuit of the integrated circuit U2 in the trigger control circuit; 2,6 pins of integrated circuit U2 in the comparison signal Vi of voltage comparator circuit output and the trigger control circuit are connected; 1 pin of integrated circuit U3 in the control signal Vo afferent pathway commutation circuit of trigger control circuit output; Usb data signal D1+, the data-signal D1-of the usb data signal D2+ of the preferential input port of first computing machine, data-signal D2-and the second computing machine input port are connected to the integrated circuit U3 in the channel switching circuit, switch the data-signal D+ of output, the data signal interfaces that data-signal D-is connected to the USB delivery outlet through integrated circuit U3.
2. USB intelligence shared device according to claim 1, it is characterized in that: channel switching circuit has comprised the dual-port high speed USB double-point double-throw switch integrated circuit of a low-power consumption, can realize quick selection and switching between binary channels.
3. USB intelligence shared device according to claim 1, it is characterized in that: power module is by the USB power supply signal of the preferential input port of first computing machine, USB power supply signal, electric capacity and current supply circuit that diode is formed of the second computing machine input port; When the first computing machine input port or second computing machine input port access usb data signal, the power supply signal in the usb data signal can both be supplied power for entire circuit, dispense with outer connecting power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200612273U CN202523058U (en) | 2012-02-23 | 2012-02-23 | USB intelligent sharing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200612273U CN202523058U (en) | 2012-02-23 | 2012-02-23 | USB intelligent sharing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202523058U true CN202523058U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200612273U Expired - Lifetime CN202523058U (en) | 2012-02-23 | 2012-02-23 | USB intelligent sharing device |
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| Country | Link |
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| CN (1) | CN202523058U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107451081A (en) * | 2017-07-27 | 2017-12-08 | 北京计算机技术及应用研究所 | A kind of physically-isolated USB sharing means |
-
2012
- 2012-02-23 CN CN2012200612273U patent/CN202523058U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107451081A (en) * | 2017-07-27 | 2017-12-08 | 北京计算机技术及应用研究所 | A kind of physically-isolated USB sharing means |
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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 | ||
| CP03 | Change of name, title or address |
Address after: Xihu District city of Hangzhou in West Zhejiang province 310000 flower Jiang Road No. 468 Patentee after: HANGZHOU JULION TECHNOLOGY AND DEVELOPMENT CO.,LTD. Address before: 1, 310000, 468 Jiang Hua Road, Xihu District, Zhejiang, Hangzhou Patentee before: HANG ZHOU JULION TECHNOLOGY AND DEVELOPMENT Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121107 |
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| CX01 | Expiry of patent term | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Bing Document name: Notice of expiration and termination of patent right |
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| DD01 | Delivery of document by public notice |