JP4342459B2 - System switching device, switching unit and switching method thereof - Google Patents

Description

  The present invention relates to a system switching device that switches digital broadcast program signals, a switching unit, and a switching method thereof.

  In commercial broadcasting systems such as public broadcasting, the system is duplicated so that switching to the standby system and maintenance work can be carried out smoothly when an abnormality occurs in the transmission path or equipment, and system connection between the two systems As possible, a patch panel is used in which relay terminals are arranged and U-links are connected between the relay terminals so that the system switch and the cable connection destination can be set in various ways.

  Panels using U-links have high flexibility in connecting each system, but the connection may be complicated and the operator may be confused. Also, because the panel surface requires a large surface, There is a signal distribution device used as a unit in which a relay terminal is accommodated in one case. (For example, refer to Patent Document 1).

However, even with this method, it is possible to check the signal of the system being switched at the relay terminal, but the problem is that the signal cannot be bypassed or taken into another system other than the switching at the unit. was there.
JP 2001-84521 A (Page 6, FIG. 6)

  In conventional business broadcasting systems, patch panels for providing flexibility in redundant connection of signal transmission systems have a larger panel size, or in a structure designed for miniaturization, bypass and other system signals can be captured. There were insufficient problems.

  The present invention has been made to solve the above problems, and it is an object of the present invention to provide a system switching device that can easily determine the input / output system of signals and can add and change devices flexibly and quickly. To do.

  In order to achieve the above object, the switching unit of the present invention is a switching unit that selects and outputs either one of the first and second broadcasting signals to be input with a built-in relay switch. , Each input connector of the signals of the first and second systems, the signal input from each connector is input, and the signal output from the relay switch that selects one of the input signals A back panel to which an output connector is attached, a common terminal to which a pin of the inserted plug is connected when a plug is inserted, and a plug connected to the common terminal when the plug is not inserted And the normally closed terminals of the first jack and the second jack are connected to each other. The common terminal of the first jack is connected to the input connector of the signal of the first system, and the common terminal of the second jack is connected to one input terminal of the relay switch. A common terminal of the second jack is connected to one input terminal, the input connector for the signal of the second system is connected to the other input terminal, and an output terminal Is connected to the output connector of the rear panel, and includes a relay switch that switches a signal input to one of the input terminals according to a control signal and outputs the signal to the output terminal.

  Further, the switching method of the switching unit of the present invention is a switching method of a switching unit that selects and outputs one of the input first and second system broadcasting signals with a relay switch that incorporates the system. The switching unit includes a rear panel to which the input connectors and output connectors of the signals of the first and second systems are attached, a relay switch, and a front panel to which a patch portion is attached, The patch unit includes a common terminal to which a pin of the inserted plug is connected when a plug is inserted, and a normally closed terminal to be connected to the common terminal when the plug is not inserted. The first normally closed terminal is connected between the first closed jack and the second closed jack; And the common terminal of the second jack is connected to one input terminal of the relay switch, the common terminal of the switch is connected to the input connector of the signal of the first system, The other input terminal is connected to the input connector of the signal of the second system, and control is performed to switch the signal output to the output connector from the signal input to one of the input terminals by a control signal. It is characterized by.

  Furthermore, the system switching apparatus of the present invention is a system switching apparatus comprising a switching unit that switches equipment or a line system for inputting / outputting signals at a broadcasting station to the first or second system, and a chassis that houses the switching unit. The relay switch and the first and second systems are prepared for each piece of equipment constituting the first and second systems or for each line constituting the first and second systems. A back panel to which any one of the signal input connectors and an output connector from which one of the signals input from each of the input connectors is output via the relay switch are attached, and when each plug is inserted A common terminal to which the pin of the inserted plug is connected and a normally closed terminal to be connected to the common terminal when the plug is not inserted; The first closed jack is connected between the normally closed terminals of the first jack and the second jack, and the common terminal of the first jack is the input of the first system. A front panel connected to a connector and attached to a patch portion in which the common terminal of the second jack is connected to one of the input terminals of the relay switch; and the second jack is connected to one of the input terminals. Common terminal is connected, the other input terminal is connected to the input connector of the signal of the second system, the output terminal is connected to the output connector of the rear panel, and the input to one of the input terminals At least one switching unit having a relay switch that switches the output signal by a control signal and outputs the signal to the output terminal; Unit is characterized by comprising a chassis having a plurality of slots mounted.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to discriminate | determine the input / output system of a signal, the system switching apparatus which can add and change an apparatus flexibly and rapidly can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

1 is an external view of a switching unit according to an embodiment of the present invention, FIG. 2 is an external view of a system switching device that accommodates the switching unit, and FIG. 3 is an example of an internal system diagram of the switching unit.
Hereinafter, the configuration and operation of the switching unit will be described with reference to FIGS. 1 and 2.

  In FIG. 1, the switching unit S has a patch part PP having jacks J1 and J2 and a connector CNC attached to the front panel FP, and connectors CNI1, CNI2 and CNO attached to the rear panel, and is input from the connectors CNI1 and CNI2. And a relay switch RS that switches the signal input from the jack J2 and outputs the signal to the connector CNO.

  In FIG. 2, the switching unit SU can switch the system for each of many devices by attaching a plurality of switching units SU to the chassis ch of the system switching device. That is, these switching units are used for each device or circuit of a dual system, such as a working VTR and a standby VTR, or a working relay line and a standby relay line. The number attached to the Ch is increased or decreased according to the addition or change of the broadcasting station system.

  In FIG. 3, the switching unit SU includes a plurality of connectors for inputting / outputting system signals attached to the rear panel BP for switching system signals, a system switching unit for relay switches, and a patch unit attached to the front panel FP. By combining these, it is possible to achieve miniaturization, accessibility, and easy-to-understand switching system.

  That is, the signal input from the connector CI1 of the rear panel BP is connected to the input terminal NC of the normal contact point of the relay switch RS via the patch part PP. Similarly, the signal input from the connector CI2 is connected to the input terminal NO of the normally open contact of the relay switch RS. The relay switch RS operates in accordance with a control signal for controlling make and break of a relay input from a connector CNC attached to the front panel FP.

  Here, the system connected to the connector CNI1 is mainly used as the active system, and the system connected to the relay via the patch unit PP and input to the connector CI2 connected to the standby system is the patch unit. Is omitted. When the standby system also performs patch processing, it may have a switching unit configuration including the same patch unit as that of the active system.

  In order to avoid the influence at the time of the occurrence of a power failure, the active system is connected to the normal contact (break state) of the relay switch RS that outputs a signal even when the power is off.

  Now, the patch part PP has two jacks J1 and J2 into which plugs Pout and Pin are inserted, respectively, and the contact structure of both jacks J1 and J2 is input to the common input terminal C when no plug is inserted. The signal is output to the normally closed terminal NC of the normally closed pin contact. Since the two jacks J1 and J2 are connected to the normally closed terminal NC, when no plug is inserted into the two jacks, the signal input to the connector CNI1 is the common terminal C of the jack J1. , The signal passes through the normally closed terminals NC of the jacks J1 and J2, is output via the common terminal C of the jack J2, and is input to the input terminal NC of the relay switch RS. If relay switch RS is set to a break state by a control signal input via connector CNC, a signal from connector CNI1 is output to connector CNO. (If relay switch RS is set to the make state, a signal input from connector CNI2 is output to connector CNO.

FIG. 4 is an internal connection diagram of the switching unit when the relay switch RS is in a break state and a connector is inserted into J1 of the patch part PP.
In FIG. 4, when the plug Pout is inserted into J1 of the patch part PP, the signal input to the connector CNI1 is input to the external device via the plug Pout, but is not output to the normal close terminal NC. The output of the connector CNO becomes a non-output state.

FIG. 5 is an internal connection diagram of the switching unit when the relay switch RS is in a break state and a connector is inserted into J2 of the patch part PP.
In FIG. 5, when the relay switch RS is in a break state and the plug Pin is inserted into the jack 2 of the patch part PP and a signal is input from an external device, the signal from the external device is transferred from the common terminal C of the jack J2 to the relay switch RS. To the input terminal NC, and the signal is output to the outside via the connector CNO. Therefore, in this case, the active system performs patch input of a signal from an external device and performs system output.

FIG. 6 is an internal connection diagram of the switching unit when the plug Pout is inserted into J1 of the patch part PP while the relay switch RS is in the make state.
In FIG. 6, the signal input from the connector CNI1 is output to the plug Pout inserted in the jack 1, while the standby signal input from the connector CNI2 is output from the connector CNO to the outside via the relay switch RS. Is output.

  When the active system fails, the relay switch RS is controlled to the make state, so that the signal from the active system can be output via the jack 1 and checked while switching to the standby system. Even if the system is not switched to the standby system, the signal from the working system is output from the plug Pout for inspection, and at the same time, the signal is promptly input from the external device via the plug Pin and the jack 2 and the broadcast signal is continued. Can be output.

  This switching unit US has good workability and space factor because all the patches can be implemented from the front panel as shown in FIG. Further, the switching unit US may be incorporated in the chassis Ch of the system switching device according to the channel that requires the patch, and the channel assignment unit is specified, so that the operator can easily determine the patch operation target.

  In addition, it is not necessary to pre-wire the back panel in an empty slot or the like on the chassis Ch side that accommodates the switching unit SU, and when an expansion is necessary, the switching unit SU is installed in the empty slot and the connection cable is directly connected to the connector. It is only necessary to connect to CNI1 or the like.

  As described above, according to the present invention, a patch portion including a jack for connecting and disconnecting a signal by engaging with a plug is attached to the front panel, and the input and output connectors of the current and spare system signals that are switched by a relay switch are provided. It is a distributed arrangement attached to the back panel. And, by combining the patch unit and the circuit unit for system switching, it is easy to distinguish the input / output system of signals by adopting a structure that mounts only the required number of units with excellent size and accessibility to the chassis. In addition, it is possible to provide a system switching device and a switching unit that can flexibly and quickly add and change devices.

The external view of the switching unit concerning the Example of this invention. The external view of the system | strain switching device which accommodated the switching unit which concerns on the Example of this invention. The internal system figure of the switching unit which concerns on the Example of this invention. The internal connection figure of a switching unit when a plug is inserted in the jack which outputs an active system signal outside. The internal connection figure of a switching unit when a plug is inserted in the jack which inputs a signal from the outside to an active system. The internal connection figure of the switching unit in the case of outputting a reserve system signal.

Explanation of symbols

BP Rear panel Ch Chassis CNI1, CNI2, CNO, CNC connector FP Front panel J1, J2 Jack Pin, Pout Plug PP Patch section RS Relay switch SU Switching unit

Claims (9)

In the switching unit that selects and outputs either one of the first and second system broadcast signals to be input by a relay switch that is built-in,
Each of the first and second system signal input connectors, and the signal input from each connector is input, and the signal output from the relay switch that selects one of the input signals is output. A rear panel with a connector attached thereto;
From two jacks each having a common terminal to which a pin of the inserted plug is connected when a plug is inserted, and a normally closed terminal connected to the common terminal when the plug is not inserted Between the normally closed terminals of the first jack and the second jack, and the common terminal of the first jack is connected to the input connector of the signal of the first system. And a front panel to which a patch portion to which the common terminal of the second jack is connected to one input terminal of the relay switch is attached;
The common terminal of the second jack is connected to one input terminal, the input connector for the signal of the second system is connected to the other input terminal, and the output terminal is connected to the output connector on the rear panel. And a relay switch that switches a signal input to one of the input terminals with a control signal and outputs the signal to the output terminal. The first system is a system through which a working signal is transmitted,
2. The switching unit according to claim 1, wherein the relay switch receives the control signal that is turned into a make-up when a power source is applied and outputs the second system as a standby system.   The switching unit according to claim 2, wherein the control signal is input from a connector provided on the front panel. In the switching method of the switching unit that selects and outputs one of the first and second system broadcasting signals to be input with a relay switch built in the system,
The switching unit is
A back panel to which each input connector and output connector of the signals of the first and second systems are attached;
A relay switch;
Comprising a front panel with a patch portion attached thereto,
The patch section includes a common terminal to which a pin of the inserted plug is connected when a plug is inserted, and a normally closed terminal to be connected to the common terminal when the plug is not inserted. The first closed jack and the normally closed terminal of the first jack are connected to each other, and the common terminal of the first jack is connected to the first system signal. Connected to the input connector, the common terminal of the second jack is connected to one input terminal of the relay switch,
The other input terminal of the switch relay is connected to the signal input connector of the second system, and a control for switching a signal to be output to the output connector from a signal input to the one input terminal by a control signal A switching method characterized in that is performed. The first system is a system through which a working signal is transmitted,
5. The switching method according to claim 4, wherein the relay switch receives a control signal for making a make-up when power is applied and outputting the second system as a standby system.   The switching method according to claim 4, wherein the control signal is input from a connector provided on the front panel. In a system switching device comprising a switching unit that switches equipment or a line system that inputs and outputs signals in a broadcasting station to the first or second system, and a chassis that houses the switching unit,
Prepared for each equipment constituting the first and second systems, or for each line constituting the first and second systems, a relay switch, and signals of the first and second systems A back panel to which any one of the input connectors and an output connector from which one of the signals input from each of the input connectors is output via the relay switch is attached, and each is inserted when a plug is inserted. The first jack and the second jack having a common terminal to which the pin of the plug is connected and a normally closed terminal connected to the common terminal when the plug is not inserted Between the two normally closed terminals, and the common terminal of the first jack is connected to the input connector of the first system. And a front panel to which a patch portion is connected to which the common terminal of the second jack is connected to one of the input terminals of the relay switch, and the common terminal of the second jack is connected to one input terminal. Is connected, the input connector of the signal of the second system is connected to the other input terminal, the output terminal is connected to the output connector of the rear panel, and the signal input to one of the input terminals At least one switching unit having a relay switch that switches to the output terminal by switching with a control signal;
A system switching device comprising: a chassis having a plurality of slots in which the switching units are mounted. The first system is a system through which a working signal is transmitted,
8. The system switching apparatus according to claim 7, wherein the relay switch receives the control signal that makes a make-up when power is applied and outputs the second system as a standby system.   The system switching device according to claim 7, wherein the control signal is input from a connector provided on the front panel.

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