JP3183184U - LAN interface switching device - Google Patents

Abstract

The present invention relates to a LAN interface switching device, in which the connection state of the LAN interface does not change even when the power is cut off, the LAN interface connection switching is performed all at once, and the LAN interface connection by all of the plurality of LAN interface switching devices. It is possible to switch all at once.
A switching unit 2 includes a common unit 1 and a plurality of switching units 2. The switching unit 2 includes a LAN-A, a LAN-B, and a LAN-C as a set, and is connected to a connector 3 that connects each LAN interface. And a switching circuit 4. The connection switching circuit 4 has a switching function for connecting either LAN-A or LAN-B to LAN-C. The common unit 1 has a function of outputting a simultaneous switching signal for switching connections to the LAN-A side or the LAN-B side to all the switching units 2 mounted on the LAN interface switching device.
[Selection] Figure 1

Description

  The present invention relates to a LAN interface switching device for connecting another LAN interface to one of two LAN interfaces.

  The LAN interface switching device is configured such that when three LAN interfaces are LAN-A, LAN-B, and LAN-C and LAN-C is a common LAN interface, either LAN-A or LAN-B is a common LAN. It has a function of connecting to LAN-C as an interface.

  The LAN interface switching device of the present invention is intended for a device in which a plurality of combinations of the LAN-A, B, and C are mounted. Therefore, when a plurality of LAN-A and B are indicated, the A system, the B system, or the A LAN-C is referred to as a common system. The switching circuit for a set of three LAN interfaces is referred to as a switching unit.

  In a LAN system that uses either LAN-A or LAN-B as the active system and the other as the standby system in the LAN system, the active LAN and the common LAN are normally connected, but there is a problem with the active LAN. When this occurs, the LAN interface switching device is used to switch between the standby LAN and the common LAN.

  Also, in a system having a working system LAN and a test system LAN, a server or personal computer is normally connected to the working system LAN, but at the time of testing, the LAN interface is switched to the test system LAN. A LAN interface switching device is provided when the system configuration is changed by switching the network.

  The LAN interface switching device in practical use is configured by a manual rotation type switch generally called a rotary switch, and one rotary switch is provided for each switching unit. Such a LAN interface switching device is sufficient for switching a small number of LAN interfaces. In addition, since such a LAN interface switching device does not require a power circuit, there is a feature that the connection state of the LAN interface does not change even if the power is cut off such as a power failure.

  A device for switching a LAN interface using a rotary switch or the like is described in, for example, Non-Patent Documents 1 to 4 below.

"10 / 100BASE compatible RJ-45ABC switch stand-alone (ABC)", [online], BLACK BOX NET WORK SERVICES, [Search February 15, 2013], Internet <URL: http://www.blackbox.co. jp / onlinestore / seihinsyousai / tabid / 74 / pdid / SWJ-100A / catid / 628 / Default.aspx> "LAN switcher", [online], UNILINK, [Search February 15, 2013], Internet <URL: http://www.unilink.co.jp/product/lanswitch4512S/> "LAN switcher (8 ports)", [online], UNILINK, [Search February 15, 2013], Internet <URL: http://www.unilink.co.jp/product/lanswitch4513/> "Switch the LAN line physically by switching all straight connections and all circuits. LAN switcher that can also be used as a simple firewall.", SANWASUPPLY, [Search February 15, 2013], Internet <URL: http: // www.sanwa.co.jp/product/syohin.asp?code=SW-LAN21>

  In a system in which a large number of LAN interfaces are switched all at once, there is a problem in that a configuration using a conventional rotary switch or the like increases the amount of operation work and may cause an operation error.

  In addition, since the LAN interface signal line is directly connected to the rotary switch, the LAN interface switching device must be structurally large. As a result, the length of separating the twisted pair lines of the LAN interface is increased, and the line impedance is increased. Due to the increase in size, there was a problem that it could not be used for high-speed communication.

  The present invention is a feature of a device using a conventional rotary switch, while maintaining the feature that the connection state of the LAN interface does not change even when the power is cut off, such as a power failure, and the multiple switching in the LAN interface switching device. Provided a LAN interface switching device that can perform switching by unit at the same time, connect multiple LAN interface switching devices, and perform simultaneous LAN interface switching by all of the LAN interface switching devices. The purpose is to do.

  The LAN interface switching device of the present invention accommodates three LAN interfaces using UTP cables, and the three LAN interfaces are assumed to be LAN-A, LAN-B, and LAN-C, respectively, and LAN-C is a common LAN. In a LAN interface switching device having a plurality of LAN interface switching units capable of connecting any of the LAN interfaces of LAN-A and LAN-B to LAN-C when used as an interface, the switching unit and device The switching unit has a continuous contact equal to or more than the number of signal lines connecting the LAN-A or LAN-B to the LAN-C. Disconnection consisting of one or more latching relays Circuit and a control circuit including two non-lock switches for generating a pulse signal for switching the connection switching circuit to the LAN-A side or the LAN-B side, and the common unit is mounted at least in the device A simultaneous switching signal generation circuit including two non-lock switches that generate a simultaneous switching signal that is a pulse signal for switching all the switching units to the LAN-A side or the LAN-B side at the same time, and the simultaneous switching signal A receiving circuit that receives from the outside, and a selection circuit that selectively outputs one of the signal generated by the simultaneous switching signal generating circuit and the simultaneous switching signal received by the receiving circuit according to set information. In addition to outputting the output signal of the circuit to the switching unit as a simultaneous switching signal in the LAN interface switching device, an external transmission circuit is provided. And having an arrangement for delivering a simultaneous switching signal Te.

  With the above-described configuration, the present invention has the function of maintaining the connection state of the LAN interface even if the AC power input is lost due to a power failure or the like, which is a feature of the conventional rotary switch type. Since a plurality of LAN interfaces by a plurality of switching units in the interface switching device can be switched simultaneously, and a simultaneous switching signal can be relayed to other equivalent LAN interface switching devices according to the present invention, To realize a highly flexible LAN interface switching system by connecting as many LAN interface switching devices as required according to the scale of the system and switching many LAN interfaces according to the scale at the same time. Can do.

It is a figure which shows the outline | summary of the LAN interface switching apparatus which is an Example of this plan. It is a figure for demonstrating the switching unit of a LAN interface switching apparatus. It is a figure for demonstrating the common unit of a LAN interface switching apparatus.

  The embodiment of the LAN interface switching device according to the present invention impairs the function of simultaneously switching a large number of LAN interfaces and maintaining the connection state even when the power input is cut off, which is a feature of the conventional device. It has been realized.

  The LAN interface switching device uses a latching relay as the main circuit of the basic connection switching circuit to overcome the weaknesses of electrical and electronic circuits such as when the power is interrupted or the connection state changes due to noise, etc. Thus, the LAN interface switching device is made into an electric / electronic circuit without losing the features of the conventional rotary switch system.

  The LAN interface switching device is generated by a simultaneous switching signal generating circuit, a receiving circuit for receiving the simultaneous switching signal from the outside, a simultaneous switching signal received by the receiving circuit, and the simultaneous switching signal generating circuit in the device A selection circuit for selecting one of the simultaneous switching signals, and supplying the simultaneous switching signal selected by the selection circuit to the latching relay as a switching signal and sending the selected simultaneous switching signal to the outside of the device Simultaneously switching by so-called daisy chain connection so that the output of the sending circuit is input to the receiving circuit of the same device in the next stage using a plurality of the same devices according to the present invention. A signal is transmitted to a plurality of LAN interface switching devices.

  FIG. 1 is a diagram showing an outline of an embodiment of a LAN interface switching device according to the present invention. In the conventional apparatus using the rotary switch, there is no common unit 1 and no simultaneous switching signal in FIG. 1, and these common unit 1 and the simultaneous switching signal are introduced by the LAN interface switching apparatus of the present invention. It is a thing.

  As shown in FIG. 1, the LAN interface switching device includes a common unit 1 and a plurality of switching units 2. The switching unit 2 includes one unit per LAN interface, and has a function of connecting either LAN-A or LAN-B to LAN-C for each unit. LAN-A, LAN-B, LAN- C is a set, and includes a connector 3 and a connection switching circuit 4 for connecting the respective LAN interfaces. FIG. 1 shows an example of a LAN interface switching device that accommodates n LAN interfaces. n is an arbitrary integer of about 2 to 8, for example.

  The connection switching circuit 4 has a switching function for connecting either LAN-A or LAN-B to LAN-C. The common unit 1 is provided in the LAN interface switching device, and is a command signal for switching the connection to the LAN-A side or the LAN-B side simultaneously for all the switching units 2 mounted on the LAN interface switching device. It has a function to output a simultaneous switching signal.

  FIG. 2 is a diagram for explaining the switching unit 2 in more detail. As shown in FIG. 2, the switching unit includes three connectors 3 provided for each of LAN-A, LAN-B, and LAN-C. And the connection switching circuit 4.

  Since the LAN interface is connected by a twisted pair wire called a UTP (Unshielded Twisted Pair) cable, it is composed of two signal lines. In this embodiment, the first signal # 1 and the second signal A pair line of two signals # 2, that is, a pair line of two signals of signals # 1a and # 1b and signals # 2a and # 2b is shown.

  The connection switching circuit 4 includes a latching relay indicated by a circuit symbol SW in FIG. 2 and a control circuit 6 for driving and controlling the latching relay. The latching relay includes a drive coil 8 and a contact 7. In this embodiment, SW- 1 to SW-4, a four-contact relay. When either one of the A switching signal for switching to the A side and the B switching signal for switching to the B side is applied as a pulse signal, the drive coil 8 switches the connection state of the contact 7 according to the signal. The connection state of the contact 7 maintains the connection state corresponding to the applied signal even after the pulse signal is interrupted.

  The control circuit 6 receives the switching command signals from the two non-lock switches 9A and 9B for individually switching the connection of only the switching unit 2 and the simultaneous switching signal from the common unit 1, and supplies the driving coil 8 with the switching command signal. It has a function of outputting an A switching signal or a B switching signal.

  FIG. 3 is a diagram for explaining the common unit 1 in more detail. The common unit includes a simultaneous switching signal generation circuit 10, a selection circuit 11, a reception circuit 12, and a transmission circuit 13. The simultaneous switching signal generation circuit 10 is a simultaneous A switch 16 that is a non-locking switch for switching to the A side all at once, or a simultaneous B switch that is a non-locking switch for switching to the B side all at once. A signal from 17 is received, and a simultaneous switching signal which is a pulse signal generated by the device is generated in response to the signal, and the signal is output to the selection circuit 11.

  The receiving circuit 12 receives a simultaneous switching signal from the preceding LAN interface switching device via the connector 14 and outputs the simultaneous switching signal to the selection circuit 11. The selection circuit 11 selects either the simultaneous switching signal generated by the simultaneous switching signal generation circuit 10 of the own device or the simultaneous switching signal received by the receiving circuit 12, and the selection is determined by the mode switch 18.

  The mode switch 18 is a lock type switch that sets the LAN interface switching device to either a master device or a slave device. When constructing a system in which a plurality of LAN interface switching devices according to the present invention are connected in a daisy chain and the LAN interfaces connected to the plurality of LAN interface switching devices are simultaneously switched, the mode switch 18 switches the plurality of LAN interface switching devices. One of the devices is set as a master device, and the other LAN interface switching device is set as a slave device.

  The selection circuit 11 of the LAN interface switching device set as the master device by the mode switch 18 selects the simultaneous switching signal generated by the simultaneous switching signal generation circuit 10 of its own device, and is set as the slave device by the mode switch 18 The selection circuit 11 of the LAN interface switching device selects a simultaneous switching signal received from the preceding device.

  The simultaneous switching signal selected by the selection circuit 11 is transmitted as a simultaneous switching signal to all the switching units 2 in its own device, and is output to the LAN interface switching device in the next stage via the sending circuit 13 and the connector 15. The

  As described above, since the switching circuit portion, which is the basic circuit, is configured by a latching relay, the connection state of the LAN interface does not change unless a switching pulse signal is newly input. While maintaining the features of the device using the LAN, the connection status of multiple switching units in the LAN interface switching device can be switched simultaneously, and multiple LAN devices connected to all of the devices can be connected simultaneously. Can be controlled according to the scale of the system, and can be used for a wide range of LAN systems.

  Previous LAN interface switching devices could only be used for small, limited LAN systems. However, the LAN interface switching device according to the present invention can be expanded according to the scale and is flexible. Since it has abundant functions, it can be applied to various LAN systems.

DESCRIPTION OF SYMBOLS 1 Common unit 2 Switching unit 3 Connector 4 Connection switching circuit 6 Control circuit 7 Contact of latching relay SW 8 Driving coil of latching relay SW 9 Non-lock switch 10 for individual switching operation Simultaneous switching signal generation circuit 11 Selection circuit 12 Reception circuit 13 Sending circuits 14, 15 Connector 16 Non-lock switch 17 for simultaneous switching operation for switching to A side Non-lock switch 18 for simultaneous switching operation for switching to B side Lock switch for mode setting

Claims (1)

When three LAN interfaces using UTP cables are accommodated, and the three LAN interfaces are assumed to be LAN-A, LAN-B, and LAN-C, and LAN-C is a common LAN interface, In a LAN interface switching device having a plurality of LAN interface switching units capable of connecting any LAN interface of LAN-B to LAN-C,
The switching unit and a common unit that is provided for each device and controls the entire device,
The switching unit includes a connection switching circuit including one or a plurality of latching relays having continuous contacts equal to or more than the number of signal lines connecting the LAN-A or LAN-B to the LAN-C, and the connection And a control circuit including two non-lock switches for generating a pulse signal for switching the switching circuit to the LAN-A side or the LAN-B side,
The common unit includes at least two non-lock switches that generate a simultaneous switching signal that is a pulse signal that simultaneously switches all the switching units mounted on the apparatus to the LAN-A side or the LAN-B side. A switching signal generation circuit, a receiving circuit that receives the simultaneous switching signal from the outside, and a signal generated by the simultaneous switching signal generation circuit and a simultaneous switching signal received by the receiving circuit are selected according to set information And a selection circuit that outputs the output signal of the selection circuit as a simultaneous switching signal in the LAN interface switching device to the switching unit, and a configuration for transmitting the signal as a simultaneous switching signal to the outside via a transmission circuit. A LAN interface switching device comprising:

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