JPH0638557B2 - Multimedia multiplexer - Google Patents

Description

DETAILED DESCRIPTION [Overview] A multimedia multiplexer having an interface capable of connecting to various types of external connection devices, which is easy to handle, including changing the circuit rule of the interface,
For the purpose of providing a connection mechanism that simplifies the mechanism and lowers the cost, in a multimedia multiplexing device having various types of interfaces that can be connected to various external devices, for example, various data terminal devices, The common circuit section is composed of a standardized printed wiring board-mounted circuit unit and a shelf mounted in the apparatus casing for plug-in mounting the circuit unit and storing and interconnecting a plurality of units. The interface board, which is equipped with the input / output specified individual circuit and the connection connector specified for each interface condition, is prepared as a menu for all connectable types, and the circuit unit provided on the shelf is provided. Connected to the backboard with the printed wiring board as the substrate, which is plug-in connected and interconnected, and from the opposite surface to the desired external connection device The interface board selected together is configured by plug-in connection, and the connection wiring from the external connection device is connected to the mounted connector, and the interface board increases or decreases according to the increase or decrease in the number of mounted circuit units. The external connection device of the connection partner is detachably mounted so that the external connection device can be replaced.

[Industrial application field]

The present invention relates to a multimedia multiplexer having an interface that enables connection with various external connection devices.

In an electronic device that is connected to a plurality of external devices of different types, it is necessary to match the interface with the connection condition of the external device of the connection partner.

For example, a multimedia multiplexer for a terminal, which is used for a digital leased line or an optical LAN, has a circuit configuration capable of connecting a large number of various terminals (external devices) having different bit rates.

This terminal can be any kind of information terminal such as a data terminal, a personal computer, a word processor, a facsimile, a telephone, etc., and its interface conforms to one of several international ISO or CCITT interfaces. This interface also defines the circuit for connection and physical conditions such as connection connector and its terminal connection.

Therefore, this multimedia multiplexer is required to have not only a circuit configuration that satisfies various international interfaces but also a connector that is circuit-connected to a terminal as a rule as an external line connection mechanism.

[Conventional technology]

 FIG. 3 shows a perspective view of an example of a conventional outside line connecting mechanism.

An example that enables connection with various external connection devices is
A multimedia multiplexer for high speed digital leased lines.
21, a circuit unit 31 in which a circuit is mounted by printed wiring board mounting, a shelf 11 in which a plurality of circuit units 31 are plugged in, an interface conversion unit 89 provided in the rear portion, and other parts. .

The shelf 11 has a circuit unit 31 inserted from the front side, is plug-in mounted to a connector mounted on a backboard 41 made of a printed wiring board on the rear side, and is interconnected by printed wiring. The back board 41 is used for connection with the.

There are various types of external connection devices on the terminal side and various types of interface connection conditions, and an interface conversion unit 89 is provided to enable easy connection to any of these.

This is a fixed frame that is provided back to back on the shelf 11.
88, and a conversion cord 85 held and fixed in the fixed frame 88, provided on the backboard 41, in which all connection circuits with external connection devices are wired for each circuit unit 31, and a conversion cord 85 for connection with the connector 45 .

The conversion cord 85 is fitted at one end with a connector 46 with a hook that fits into the connector 45, is locked in the connected state, and can be easily attached and detached, and at the other end, a connector designated by an external connection device. 6 is 2 on a metal strip-shaped fixing plate 87
Individually fixed and mounted, a flexible cord connects predetermined terminals as prescribed.

Therefore, in this case, the case where one of the circuit units 31 corresponds to connection with two external connection devices is shown. Thus, the conversion code 85 includes the connection connectors 6 corresponding to various interfaces of the external connection device. The equipment is provided as a menu as a device.

The fixed frame 88 is a rectangular metal frame that is substantially the same as the rear surface of the shelf 11, and is attached to the lower edge of the fixed frame body so as to be able to rotate backward. The fixed plate 87 of the conversion cord 85 is attached to the metal frame. There are screw holes for fixing.

Thus, by knowing the type and number of interfaces of the external connection device of the connection partner, the number of circuit units 31 to be mounted and the number of conversion codes 85 by type are determined, and the fixed frame 88
When the metal frame of is opened backward, each conversion cord 85 is connected to the connector 45 corresponding to the mounting position of the circuit unit 31, the fixed frame 88 is returned, and the fixed plate 87 is fixed, the connection connector 6 is multimedia multiplexed. They are aligned on the back side of the rectifying device 21 and are connected to the connection wirings 8 from predetermined external connecting devices by connectors.

[Problems to be solved by the invention]

However, the interface regulation with the external connection device is composed of the circuit regulation and the regulation of the connector and its terminal connection, and the variable portion according to the circuit regulation needs to be prepared by changing the type of the circuit unit 31 into a menu. If there is a change, the circuit unit 31 must also be replaced.

In addition to the interface circuit, the circuit unit 31 is also equipped with a channel circuit and the like.
Is expensive to replace.

When adding a new interface circuit menu, the circuit unit 31 must be newly designed.
An extra turn is required for manufacturing.

There are problems such as.

The present invention has been made in view of the above problems, and an object thereof is to provide a connection mechanism that is easy to handle, including modification of the interface circuit specifications, and that simplifies the mechanism and reduces the cost.

[Means for solving problems]

As shown in the principle configuration diagram of FIG. 1, the above-mentioned problem is common in the multimedia multiplexer 2 having various kinds of interfaces so as to be connectable to various kinds of external connection devices, for example, various data terminals. A circuit unit 3 having a standardized printed wiring board mounting circuit portion, and the circuit unit 3 mounted in an apparatus casing.
Interface board in which the input / output regulation individual circuit 5 and the connection connector 6 which are defined by various interface conditions of the connection are mounted together with 7 is prepared as a menu for all types that can be connected.

An interface selected in accordance with a desired external connection device from the opposite surface to a backboard 4 provided on the shelf 1 with a circuit unit 3 plug-in connected and a printed wiring board that is interconnected for wiring. The board 7 is plugged in, and the mounted connection connector 6 is connected to the connection wiring 8 from the external connection device.

In addition, the interface board 7 is provided with an interface connection mechanism that is detachably attached so that it can be increased or decreased according to the increase or decrease in the number of mounted circuit units 3 and can be replaced corresponding to the external connection device of the connection partner. It is solved by the multimedia multiplexer of the invention.

[Action]

That is, all the variable parts according to the type of interface are mounted on the removable interface board, and thus the object is achieved.

The line set part of the multimedia multiplexer is It can be classified as follows.

The common unit accommodates a digital processing unit common to each interface, and is a fixed circuit configuration unit without any influence even if the interface changes.

The variable part is a specified individual circuit that changes depending on the interface,
For example, there are driver / receiver circuits and connector shapes and terminal connections for connection with external connection devices,
Both are specified for each interface.

The present invention is as shown in the principle configuration diagram of FIG. 1 shown from the side of the shelf 1. The line set common part and other circuits are mounted on the circuit unit 3, and the line set variable part is mounted on the interface board 7. The individual circuit of the interface and the connection connector 6 to be connected to the connection wiring 8 from the external connection device are mounted.

In the shelf 1, the circuit unit 3 is inserted from the front side, and the interface board 7 is inserted from the back side. Plug-in connection is made to both sides of the internal backboard 4, both are connected by the printed wiring of the backboard 4, and the backside is connected. The connection wiring 8 from the external connection device is connected to the connector 6.

Since all the variable parts of the interface are integrated into the interface board 7 and are made into a menu, the interface board 7 may be selected and used, and the structure is easy to attach and detach by plug-in connection. The number of connected lines is increased or decreased, and only the variable part is mounted, so the cost is high even if replaced.

Also, in the case of adding a new interface, only the interface panel 7 needs to be newly designed, and the manufacturing process can be shortened.

Thus, it is possible to provide a connection mechanism that is easy to handle, including changing the circuit specifications of the interface, simplifies the mechanism, and reduces the cost.

〔Example〕

The present invention will be specifically described below with reference to the embodiments shown in the drawings.

Throughout the drawings, the same reference numerals indicate the same symmetrical objects.

FIG. 2 shows a perspective view of an embodiment of the present invention.

In the configuration of this embodiment, the circuit unit 3 forming the common circuit portion and the interface defining individual circuit 5 are connected to the printed wiring board.
It is composed of an interface board 7 mounted on 71, a connector 6 for physical conditions is provided at the end thereof by circuit connection, and a connector 72 for plug-in connection at the opposite end, and a shelf 1 for mounting both of them. .

The shelf 1 is a printed wiring provided with a press-fit pin-type connector 44 provided with a circuit unit 3 from the front side and an interface board 7 from the rear side, respectively, and provided in the central portion, through which contacts are formed at both ends. It is plug-in connected to the backboard 4 made of a plate.

The backboard 4 is connected to each other to form a predetermined interface.

The connector 44 of the backboard 4 has the circuit unit 3 on one side.
Connector 72 of the interface board 7 on the other side
Since it is plugged in, two separate connectors are attached on both sides, and wiring connection by printed wiring is omitted.
There is an advantage that the interface board 7 is mounted according to the number of mounted circuit units 3.

The interface board 7 has the input / output regulation individual circuit 5 of the interface, the connection connector 6 of the physical connection mechanism and its terminal connection. As the physical connection mechanism, RS2 of EIA is used.
25P connector for 32C, 37P connector for PS449, CCITT
In the V35, the connection disassembly point with an external connection device, such as the 34P connector, must be a connection connector that conforms to the standard, so all types of connectable interfaces are prepared as a menu.

The above embodiment shows an example, and the structure of the interface board 7, the shape of the connector 44 of the backboard 4, and the structure of the shelf 1 are not limited to the above.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a connection mechanism that is easy to handle, simplifies the mechanism, and reduces the cost, including the circuit rule change, for various interfaces. It is possible to make a great contribution to the manufacture and operation of the automation device.

[Brief description of drawings]

 FIG. 1 is a principle configuration diagram of the present invention, FIG. 2 is a perspective view of an embodiment of the present invention, and FIG. 3 is a perspective view of a conventional example of an outside line connecting mechanism. In the figure, 1,11 is a shelf, 2,21 is a multimedia multiplexer, 3,31 is a circuit unit, 4,41 is a backboard, 5 is a specified individual circuit, 6 is a connector, 7 is an interface board, 8 Is a connection wiring, 44, 45, 46, 72 are connectors, 71 is a printed wiring board, 85 is a conversion code, 87 is a fixed plate, 88 is a fixed frame, and 89 is an interface conversion section.

Claims (1)

[Claims] 1. In a multimedia multiplexing device (2) having a wide variety of interfaces capable of connecting to various external devices, for example, various data terminals, a common circuit section is standardized on a printed wiring board. The mounted circuit unit (3) and the circuit unit (3) mounted in the device housing
It is configured by a shelf (1) that is plug-in mounted and that stores and interconnects a plurality of components, and the input / output regulation individual circuit (5) and the connector (6) that are specified for each interface condition of the connection are combined. The interface board (7) mounted on the shelf is prepared as a menu for all types that can be connected, and the circuit unit (3) provided on the shelf (1) is plugged in and interconnected. The backing board (4) using the printed wiring board as a substrate, the interface board (7) selected from the opposite surface according to the desired external connection device.
Plug-in connection, connect the connection wiring (8) from the external connection device to the mounted connection connector (6), increase or decrease according to the increase or decrease in the number of mounted circuit units (3), and connect. A multimedia multiplexing apparatus comprising an interface connection mechanism for detachably mounting the interface board (7) so that the interface board (7) can be exchanged corresponding to the external connection apparatus of the other party.