CN2836345Y - Network connection and disconnection device - Google Patents

Abstract

The utility model provides a network connection and disconnection device which is used for connecting or disconnecting a computer and a network. The utility model comprises a switch device and a control device, the switch device is provided with an input end and an output end, wherein the input end of the switch device is connected with the output end of the computer, and the output end of the switch device is connected with the network; the control device is used for controlling the connection and disconnection of the switch device, and the control device is selectively connected or disconnected to the switch device. The switch device is provided with a connection control normally open switch and a disconnection control normally open switch, wherein the connection control normally open switch is associated with a single pulse generator, and the single pulse generator can connect in time the switch device with the network; the disconnection control normally open switch is associated with a bistable trigger, when the bistable trigger is triggered, the switch device is disconnected with the network. The control device which is coupled with the bistable trigger can guarantee that the switch device is always in a disconnection mode when circuits are powered up.

Description

The connection of network and off device

Technical field

The present invention relates to a kind of network switching equipment, more particularly, is a kind of with computer or miscellaneous equipment and network especially Internet, connects and disconnects the switchgear that connects.

Background technology

As everyone knows, the effect brought into play in modern society's daily life of Internet grows with each passing day.It is in order to realize multiple use that people utilize Internet, and for example Pay Bill obtains information, obtains medical records and various security information.As everyone knows, Internet, such " the digital high-speed highway " of perhaps similar Internet is transmitted in both directions.Therefore people can send information and reception information by such network.Under this framework, if disconnecting with Internet, a computer is not connected, hacker and people of the kind can by with this computer of Internet connected reference, and for realizing various illegal objectives, perhaps Qi Zha purpose and control this computer.Like this, the hacker can visit personal computer, and can extract and the relevant information of content such as financial transaction.People can cause this fact of the network crime obvious to all to using Internet, must take the precautionary measures to this type of crime.American National network security association (NCSA) indication consumer strengthens the protection to self and other people, in time is not connected with the Internet disconnection computed the time.But most of people do not do like this, must shut down computer or disconnect modulator-demodulator because will disconnect being connected with network.We know, if computer cuts out, just must guide again and start when reusing computer.The startup of computer is a veryer long process, so many people would rather allow computer be in " start " state all the time, this is just convenient more hacker is access computer at any time.Obviously, when people are not online, computer disconnected connection with Internet can reduce the chance that others visits this computer.For example, if a computer user does not have fire compartment wall and anti-virus software, unwarranted people just can obtain the access right to his computer, and infects this computer, perhaps uses other users on this computer attack Internet.Therefore, American National network security association (NCSA) points out, when the user is not online, need be connected with the Internet disconnection, thereby promotes network security, improves the fail safe of online behavior.Association points out, accomplishes this point and is not easy, because many people are unwilling to do like this, just leaves computer, so when computer did not use, modulator-demodulator still was connected with Internet.

The utility model content

In order to solve the deficiency of above-mentioned technology, the purpose of this utility model provides especially Internet auxiliary switch assembly of a kind of network, and it can make the user when not using personal computer its computer is connected with the Internet disconnection quickly and easily.

In order to achieve the above object, the utility model has adopted following technical scheme to realize, promptly a kind of connection of network and off device are used for computer and network being connected or disconnecting, and this equipment consists of:

One switching device, this switching device have an input and an output, and the input of described switching device links to each other with fanout, and the output of described switching device links to each other with described network; And

The connection of the described switching device of one may command and the control device of disconnection, this control device selectively disconnect connection or are connected in described switching device.

Therefore this switchgear is the cut-off signal path physically, and when utilizing switchgear that computer and Internet disconnection are connected, computer can not be subjected to the attack from Internet.This switchgear can link to each other with modulator-demodulator by Ethernet interface or USB interface.This switchgear can obtain power supply by USB interface, also can select to use external power source.This just makes the user quickly and easily its computer is connected with Internet or disconnects connection, thereby avoids suffering hacker attacks when not using a computer fully.

Description of drawings

Fig. 1 is the schematic diagram of a computer networking system, shows that this system can be connected or disconnect connection with Internet by a switchgear that the present invention relates to;

Fig. 2 can make these computers be connected with Internet or disconnects connection for utilizing many schematic diagrames that switchgear is connected with many computers that the present invention relates to, showing;

Fig. 3 shows, utilizes a switchgear that the present invention relates to, and adopts wireless local area (WiFi) to connect, and the computer of a use radio-frequency transmissions can be connected or disconnect connection with Internet;

Fig. 4 is the another kind of computer connected mode schematic diagram that utilizes two switchgears to be connected with Internet;

Fig. 5 utilizes the schematic diagram of the utility model with various device and Internet connected mode;

Fig. 6 is that the utility model passes through USB or modem interface are connected computer with Internet a kind of possible implementation;

Fig. 7 utilizes circuit theory diagrams of the present utility model.

Embodiment

With reference to the accompanying drawings and in conjunction with the embodiments, to originally being further described in detail and explaining.

As shown in Figure 1, an embodiment of the present utility model provides a kind of connection of network and a kind of typical way that off device 11 is connected with Internet.PC 10 and network be connected and off device 11 links to each other, switchgear 11 can be with PC, the input of the connection of this network and off device 11 links to each other with the network output of computer, the output of switchgear is guided to the input of router one 2, and router one 2 links to each other with Internet 13 again.This is a kind of well-known router connected mode.As can be seen from Figure 1, connect or Disconnected mode, can allow computer 10 be connected or disconnect connection with Internet by selecting to allow the connection of network and off device 11 (following will the introduction) be operated in.According to actual conditions, the output of the connection of network and off device 11 can link to each other with USB (USB) or network cable.

As shown in Figure 2, provided a kind of Typical Disposition that is used for home network or office network equally.As seen from Figure 2, three computers 14,15 and 16 are arranged.Understand easily, in the basic conception that idle condition prevents hacker attacks, utilize this configuration can connect more computers according to every computer of protection.Therefore, every computer is associated with a switchgear that the present invention relates to.Every switchgear number consecutively is 17,18 and 19, and wherein every switchgear is associated with a computer successively.The output of all these switchgears is all guided to the input of router two 0, and router two 0 links to each other with broadband modem 21, and modulator-demodulator 21 directly links to each other with Internet 22 again.As can be seen from Figure 2, when every the switchgear that is numbered 17,18 and 19 is operated in Disconnected mode following time, can be respectively with the personal computer of each auto correlation, be PC 14,15 and 16 and Internet isolate fully, when being operated in connection mode following time, also can be respectively the personal computer of each auto correlation be connected with Internet.

As shown in Figure 3, provided the another kind of Typical Disposition that the notebook computer by a WiFi access point and one band WiFi adapter constitutes.As can be seen from Figure 3, the notebook computer 25 of band WiFi adapter links to each other with WiFi access point 26 by high frequency link.The output of WiFi access point 26 links to each other with the input of switchgear 27.The output of switchgear 27 links to each other with broadband modem/router two 8, and the latter links to each other with Internet 29 again.If switchgear 27 is turned off, WiFi access point 26 will disconnect with Internet and being connected, thereby notebook computer 25 and Internet are kept apart, this has just produced expected effect---when computer does not use, it is connected with the Internet disconnection, thereby prevents that the hacker from visiting this computer.

As shown in Figure 4, provided the another kind of Typical Disposition of utilizing modern communication systems to constitute.As can be seen from Figure 4, a WiFi access point PC that has external USB WiFi adapter is arranged.Like this, according to Fig. 4, personal computer 30 links to each other with a switchgear 31 that the present invention relates to.The output of switchgear 31 links to each other with USB/WiFi adapter 32 again.Adapter 32 transfers signals to WiFi access point apparatus 33, and access point apparatus 33 links to each other with another switchgear 34, and the output of switchgear 34 links to each other with router three 5 again.The output of router three 5 links to each other with broadband modem 36, and modulator-demodulator 36 links to each other with Internet 37 again.As can be seen from Figure 4, in fact this configuration has used two switchgears; Switchgear 31 disconnects personal computer and being connected with USB/WiFi adapter 32, switchgear 34 disconnects WiFi access point 33 and being connected with router three 5, thereby is connected with the Internet disconnection.It should be noted that why use two switchgears, is just can visit personal computer 30 because utilize a WiFi access device to communicate by letter with USB/WiFi adapter 32.Therefore, in the configuration that Fig. 4 provides, two switchgears that the present invention relates to have been used, i.e. switchgear 31 and 34.

As shown in Figure 5, provided a kind of configuration that utilizes a wireless PC and a WiFi access point formation.As can be seen from Figure 5, personal computer is that PC 38 links to each other with the input of switchgear 39, and the output of switchgear 39 links to each other with router four 2 again.Also have a WiFi access point 40 to link to each other with the input of switchgear 41, the output of switchgear 41 also links to each other with router four 2.The output of router links to each other with broadband modem 43, and modulator-demodulator 43 links to each other with Internet again.In this configuration, access point 40 obviously can be by many remote computer access, thereby need a switchgear 41 that this access point and computer and Internet are kept apart.Obviously, when not using a computer 38 the time, switchgear 39 can be kept apart itself and Internet.

As shown in Figure 6, provided a kind of configuration that utilizes a switchgear realization that the present invention relates to.USB or network cable connected mode have been used in this configuration shown in the figure.Computer 46 has a CAT5 broadband connection device among the figure.CAT5 broadband connection device links to each other with the input of switchgear 48, and the CAT5 broadband connection device output of switchgear 48 links to each other with broadband modem 50, and modulator-demodulator 50 is connected with Internet by a POTS (common old-fashioned telephone service) circuit.Fig. 6 shows that also a computer 47 that has USB broadband connection device links to each other with switchgear 49, and switchgear 49 links to each other with broadband modem 51 by a USB cable again, and modulator-demodulator 51 is connected with Internet by a POTS circuit.This shows that several configurations of this that provides are most typical network configuration above, in these several configurations, utilize the switchgear that the present invention relates to, every computer or equipment all can be isolated with Internet when not using fully.

As shown in Figure 7, provided the switchgear 11 in the image pattern 1, the circuit theory diagrams of the switchgear 17,18 among Fig. 2 and 19 or the like such electrical switchgears.To introduce the structure and the operation principle thereof of this circuit below.The connection of this network and off device have input and output, and wherein input is to be made of an input connector 80 and an out connector 81.These two connectors are used for USB output with computer and are connected with network or disconnect connection.Also have two connectors that are connected with Internet in addition, promptly 82 and 83, these two connectors have constituted the output of this equipment.Will explain below, a cable, for example the cable of drawing from computer 10 among Fig. 1 can link to each other with connector 80, and 80 is USB connector.If computer has the USB output, the USB output of computer is linked to each other with connector 80, then the output of connector 81 should link to each other with a USB interface or network cable interface (equipment end).Therefore, as shown in Figure 7, should link to each other with USB input connector 80, and the USB output of connector 81 will link to each other with USB cable or network cable or miscellaneous equipment from the USB output of computer 10.Similar with it, connector 82 is used for connecting computer and Internet, so the network output of computer should link to each other with connector 82, and the output of connector 83 should link to each other with USB cable or network cable.As can be seen from the figure, 80,81,82 is all related with suitable relay contact with 83 these four connectors.Like this, USB socket 80 with 81 with to have two contacts related to 86 relay 85.Relay 85 is a dpdt double-pole double-throw (DPDT) (DPDT) relays.The relay that is connected with Internet is 87 and 88; Their contact is to being respectively 89 and 90.The operation principle that need not to discuss circuit just as can be seen, in fact Fig. 7 has provided the off-state of switchgear.Therefore, in Fig. 7, and disconnect Internet and being connected all of USB, equipment (for example computer or PC) is isolated with network.With connector 82 is example; Connector 82 has two lead-out terminals, is designated as RD+ and RD-respectively.These two terminals link to each other with the reception pin.Connector 82 also has two splicing ear TD+ and TD-, links to each other with transmit pin.Thereby the R pin is exactly the reception pin from the computer access Internet, and the T pin is exactly the transmit pin of visit Internet.As seen from the figure, connecting must be by relay contact 89 and 90.As seen from the figure, the RD+ of connector 82 does not link to each other with the RD+ of connector 83; Therefore the RD+ of connector 82 and the RD+ of connector 83 isolate.Similar with it, RD-, TD+ also disconnect with the related terminal of connector 83 with TD-.So just formed open-circuit condition, thereby computer and Internet have been kept apart.Similar with it, the USB pin for example 2 and 3 does not link together yet, because not work of relay.This state representation switchgear of relay shown in Figure 7 is in Disconnected mode.As can be seen, all relay coils, for example coil 85,87 and 88 all with the coupling of the collector output of NPN triode 63.Triode 63 also is connected to one group of bypass diode 99, and these diodes are connected across the two ends of coil, as the electric arc killer tube.The emitter of triode 63 and a reference point of potential or " " link to each other, the base stage of triode 63 links to each other with the Q output of a D type flip and flop generator 61 by a resistance 190 simultaneously.Find out that easily under off-state, triode 63 ends, thereby does not have electric current to pass through.Like this, the Q output of D type flip and flop generator 61 (being designated as terminal 5) also is in off-state, promptly is in low level (zero output).Therefore, triode 63 is in cut-off state, and relay 85,86,87 and 88 is not worked, thereby contact that will be related with these relays all places position as shown in Figure 7.As can be seen, D type flip and flop generator 61 and one-shot multivibrator 60 and 62, i.e. monopulse generator association.Multivibrator or title monopulse generator 62 can guarantee that flip and flop generator 61 always at first enters off-state (Q=0) when circuit powers up, thereby guarantee that triode 63 always is in cut-off state after circuit powers up, and then guarantee that relay 85,86,87 and 88 do not work.The method that realizes this effect is: with the zero clearing input coupling of monopulse generator 62-Q output and flip and flop generator 61.It can also be seen that from figure a connection control switch 70 and a disconnection control switch 71 are arranged, these two switches all are normally closed switch (promptly normally disconnecting).Normally closed switch 70 and 71 with input and output momentary connection, promptly returns position shown in Figure 7 after action is finished when work.The time constant of pulse trigger 62 is by resistance 91 and electric capacity 92 decisions, and the common port of resistance 91 and electric capacity 92 links to each other with the R/C input of pulse trigger 62.Time constant decision pulse duration.When circuit being applied operating voltage VCC (first power supply), the first power supply VCC is electric capacity 94 chargings by resistance 93, and the tie point of resistance 93 and electric capacity 94 links to each other with the B input of monopulse generator 62.This just causes monopulse generator 62 to produce a pulse, thereby triggers the zero clearing input of flip and flop generator 61, guarantees that flip and flop generator 61 is in off-state, zero clearing attitude in other words, and promptly the Q output is a low level.Like this, the operation principle of circuit always can trigger flip and flop generator 61 by bonding pulse generator 62 when circuit powers up, thereby make 61 must be in off-state, and then make the relay in the circuit be in position shown in Figure 7, the Disconnected mode of Here it is switchgear.Also have a monopulse generator 60 in addition, its pulse duration is by resistance 95 and electric capacity 96 decisions, and the tie point of resistance 95 and electric capacity 96 directly links to each other with the R/C input of pulse trigger 60.As can be seen from the figure, the B input of pulse trigger 60 promptly triggers input and the end coupling that is connected switch, and this end is also by electric capacity 97 and reference point of potential coupling.Have the resistance 98 and the other end of switch 70 to be coupled, the other end of resistance 98 then is coupled with power supply VCC.So as can be seen from Figure 7, when console switch 70, the B input of pulse trigger 60 is effective through beginning behind the certain hour, and the length of this time is determined by electric capacity 97 and resistance 98; This can make pulse trigger 60 trigger, thereby produces a pulse at the Q output.This pulse is transferred to the input end of clock of flip and flop generator 61 by diode 100.At this moment flip and flop generator 61 also will trigger, because when pressing switch 70, its D input and clock all become effectively.Thereby the state of flip and flop generator 61 changes, and its Q output (terminal 5) becomes high level from low level.When the Q of flip and flop generator 61 output becomes high level, triode 63 conductings, thus drive relay 85,87 and 88 work.This will place contact and opposite position shown in Figure 7.At this moment, this action of relay can be set up a series of connections, and the RD+ pin of connector 82 is linked to each other with the RD+ pin of connector 83.Equally, all the other related pins, for example TD+ and TD+ also can be connected to each other.So just make computer be able to be connected with Internet, USB has also realized normal connection.The Disconnected mode of Here it is switchgear.After this, computer will be in line states always, up to shutdown or press cut-off switch 71, make the contact of relay return as shown in Figure 7 position.Press when disconnecting control switch 71 when of short duration, switchgear returns Disconnected mode again.As can be seen from the figure, press when disconnecting control switch 71 when of short duration, VCC is added to the input end of clock of flip and flop generator 61 by resistance 103.At this moment diode 100 is partially anti-, so flip and flop generator 61 triggers, its Q output becomes low level once more, thereby triode 63 is ended.Can see among the figure two LED (light-emitting diode) are arranged; One related with off-state, and another is related with connection status.LED 101 is " disconnection " indicator lights (redness), and LED 102 is " connection " indicator lights (green).As can be seen from Figure 7, when the Q output was high level, LED 102 was luminous; When-when the Q output was high level, LED 101 was luminous.Like this, when circuit is in connection mode, there is a green indicating lamp (LED 102) luminous; When circuit is in Disconnected mode, there is a red led (LED 101) luminous.Can also see that in addition an independently connector 110 is arranged, it links to each other with pressurizer 112, to regulate output voltage, i.e. operating voltage VCC.This voltage is added on the switchgear.In any case, can apply external power source to connector 110; Perhaps, when using USB interface, USB interface can provide voltage at its output, and this voltage also can be transformed to VCC.This voltage VCC that is provided by USB can directly be added to terminal 1, thereby produces voltage of voltage regulation; Perhaps, when voltage passes through voltage stabilizing, can directly be used as VCC.Can see that under any circumstance, above-mentioned electrical switchgear all is to lean on normally closed switch 70 and 71 starting device work.The default conditions of electrical switchgear are off-state always, or claims Disconnected mode, thereby when electrical switchgear was opened first, relay coil 85,87 and 88 was not worked.In order to be connected with Internet, must of short durationly press switch 70 (connection), make triode 63 conductings, thereby drive the relay work related with it.So just can set up from input connector 80 to out connector 81 USB and connect, and set up from input connector 82 to out connector 83 Internet and connect.

Those skilled in the art can use the function of replenishing circuit described in the utility model with the similar replacement structure of circuit as herein described, the replacement that all are similar or specialize and all be regarded as being included within the claim protection range of the present utility model.

Claims (20)

1, a kind of connection of network and off device are used for computer and network being connected or disconnecting, and it is characterized in that this equipment consists of:

One switching device, this switching device have an input and an output, and the input of described switching device links to each other with fanout, and the output of described switching device links to each other with described network; And

The connection of the described switching device of one may command and the control device of disconnection, this control device selectively disconnect connection or are connected in described switching device.

According to the connection and the off device of the described network of claim 1, it is characterized in that 2, the input of described switching device is first connector, described switching device output is second connector; First connector has a plurality of terminals that can link to each other with the connector of Net-connected computer; Second connector has and the identical terminal arrangement of described first connector, and described first connector selectively disconnects connection or is connected in described second connector.

3, the connection of network according to claim 1 and off device, it is characterized in that, described control device comprises that one connects control switch, and one disconnect control switch, described connection switch connects first monopulse generator, described disconnection control switch is connected with a flip and flop generator, and input and the coupling of first power supply, described pulse output and the coupling of described flip and flop generator of second monopulse generator are arranged.

4, the connection of network according to claim 1 and off device, it is characterized in that, described switching device comprises at least one relay, the right common port in every pair of contact of this relay is coupled with the related terminal of described second connector, and has a contact to be coupled with a related terminal of described first connector.

5, the connection of network according to claim 4 and off device is characterized in that, described relay also is coupled with triode.

6, the connection of network according to claim 5 and off device is characterized in that, the base stage of described triode is connected with a flip and flop generator and connects.

7, the connection of network according to claim 1 and off device is characterized in that, described switching device also comprises the indicating device that shows that network connects and disconnects, and this indicating device is connected with described flip and flop generator.

8, the connection of network according to claim 7 and off device is characterized in that, described indicating device is the luminescent device of two different glow colors: be communicated with the indication luminescent device and disconnect just luminescent device.

9, the connection of network according to claim 3 and off device is characterized in that, described connection control switch and disconnection control switch are normally closed switch.

10, the connection of network according to claim 3 and off device is characterized in that, described first power supply also is in series with resistance and electric capacity, the input coupling of the tie point of described resistance and electric capacity and described second monopulse generator.

11, the connection of network according to claim 3 and off device is characterized in that, described connection control switch is connected with the input of described flip and flop generator.

12, the connection of network according to claim 3 and off device is characterized in that, the output of described second monopulse generator connects the clear terminal with described flip and flop generator.

13, the connection of network according to claim 8 and off device, it is characterized in that, described connection indication luminescent device is connected in the high flat output of bistable state generator, and described disconnection indication luminescent device is connected in the low flat output of bistable state generator.

14, the connection of network according to claim 4 and off device is characterized in that, described control device includes first relay, second relay, the 3rd relay, and described three relays are communicated with, and are connected with the collector electrode of triode.

15, the connection of network according to claim 14 and off device is characterized in that, are connected with the diode group between the collector electrode of described triode and the relay.

16, the connection of network according to claim 3 and off device is characterized in that, the output of described first monopulse generator is connected with described disconnection control switch by diode.

17, the connection of network according to claim 4 and off device is characterized in that, described relay is a double-pole double-throw relay.

18, the connection of network according to claim 3 and off device, it is characterized in that, described control device also has second source, and this second source end is in series with resistance and electric capacity, and the tie point place of resistance and electric capacity is connected to the input end of clock of first monopulse generator.

According to the connection and the off device of the described network of claim 1, it is characterized in that 19, described network is an Internet.

20, the connection of network according to claim 1 and off device is characterized in that, the output of described computer is the USB output.

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