JPH01169998A - Multi-media multiplexing device - Google Patents

Abstract

PURPOSE:To obtain an attachment simplifying a mechanism and reducing cost by forming a common circuit section by a circuit unit and a shelf plug-in mounting the circuit unit and storing and mutually connecting a plurality of the circuit units. CONSTITUTION:A common circuit section is shaped from a circuit unit 3, to which a standardized printed wiring board is mounted, and a shelf 1 plug-in mounting the unit 3 and storing and mutually connecting a plurality of the units 3. An interface board 7 selected in conformity with a desired external connector from a reverse surface is plug-in connected to a back board 4, to which the unit 3 set up to the shelf 1 is plug-in connected and which uses the printed wiring board conducting mutual wiring connection as a substrate, and connecting wirings 8 from an external connector are connected to mounted connecting connectors 6. The interface board 7 is fitted detachably. Accordingly, an attachment simplifying a mechanism and reducing cost is acquired.

Description

[Detailed Description of the Invention] [Summary] Regarding a multimedia multiplexing device equipped with an interface that enables connection with a variety of external connection devices, the present invention is easy to handle, including changing the interface circuit regulations, and has a simplified mechanism and low cost. With the aim of providing a connection mechanism that reduces costs, the common circuit section is used in a multimedia multiplexing device that is equipped with a variety of interfaces that can be connected to a variety of external devices, such as various data terminals. It consists of a circuit unit mounted on a standardized printed wiring board, and a shelf mounted on the device housing where the circuit unit is plug-in mounted, and which stores and interconnects a plurality of circuit units. In addition, an interface board in which input/output regulation individual circuits and connection connectors are mounted together is prepared with a menu of all connectable types, and the circuit units installed on the shelf are plug-in connected to each other. Plug-in the interface board selected according to the desired external connection device from the opposite side to the backboard whose substrate is the printed wiring board on which the wiring is connected, and connect the external connection device to the mounted connection connector. In addition, the interface board is configured to be detachable so that it can be increased or decreased in accordance with the increase or decrease in the number of circuit units mounted, and can be replaced in accordance with the external connection device to be connected. It is.

[Industrial application field]

The present invention relates to a multimedia multiplexing device equipped with an interface that allows connection to various external connection devices.

In an electronic device that connects to a plurality of external devices of different types, it is necessary to match the interface to the connection conditions of the external device to be connected.

For example, a multimedia multiplexing device for a terminal station used for a digital dedicated line, an optical LAN, etc. has a circuit configuration that allows connection of a large number of various terminal devices (external devices) with different bit rates.

This terminal includes all kinds of information terminals such as data terminals, personal computers, word processors, facsimile machines, and telephones, and its interface conforms to any of several types of international ISO or CCITT interfaces. This interface also defines the circuit specifications for connection and the physical conditions such as connectors for connection and their terminal connections.

Therefore, this multimedia multiplexing device not only needs to have a circuit configuration that satisfies various international interfaces, but also needs to be equipped with a connector whose circuit is connected to the terminal as specified as an external line connection mechanism.

[Conventional technology]

FIG. 3 shows a perspective view of an example of a conventional external line connection mechanism.

A circuit unit 31 configured to be able to connect with a wide variety of multiple external connection devices, a shelf 1) on which a plurality of circuit units 31 are plug-in mounted, an interface converter 89 provided at the rear thereof, and other parts. configured.

In the shelf 1), a circuit unit 31 is inserted from the front, and is plug-in mounted to a connector mounted on a backboard 41 made of a printed wiring board on the rear side, and interconnected with printed wiring. Connections with the outside are made through this backboard 41.

There are many types of external connection devices on the terminal side, and various interface connection conditions, and in order to easily connect to any of these devices, an interface converter 89 is provided.

This consists of a fixed frame 88 provided back to back on the rear surface of the shelf 1), which is held and fixed in the fixed frame 88, and provided on the backboard 41. All connection circuits with external connection devices are wired for each circuit unit 31. It also includes a conversion cord 85 to be connected to the connector 45.

The conversion cord 85 has one end that fits into the connector 45,
It is locked when connected and can be easily attached and detached.
A connector 46 with a hook is attached, and at the other end, two connectors 6 designated for external connection devices are fixed and attached to a fixed plate 87 in the form of a metal strip, and a flexible cord is used to connect to a specified terminal as specified. It is a connection between

Therefore, in this case, one of the three circuit units is connected to two external connection devices.
The conversion code 85 is a menu of devices that are equipped with connectors 6 that correspond to various interfaces of external connection devices.

The fixed frame 88 is a metal frame that is approximately the same square as the rear surface of the shelf 1) and is attached to the lower edge of the fixed frame body so that it can be rotated backwards. 8
7 holes are provided for fixing.

In this way, if you know the type and number of interfaces of the external connection device to be connected, you can determine the circuit unit 31 to be mounted.
The number of conversion cords 85 and the number of types of conversion cords 85 are determined, the metal frame of the fixed frame 88 is opened rearward, each conversion cord 85 is connected to the connector 45 corresponding to the mounting position of the circuit unit 31, and the fixed frame 88 is opened. If you return it and fix the fixing plate 87,
Connection connectors 6 are arranged on the back side of the multimedia multiplexing device 21, and connection wiring 8 from each predetermined external connection device is arranged.
and the connector is connected.

[Problem that the invention seeks to solve]

However, ■ Interface regulations with external connection devices consist of circuit regulations and regulations for connection connectors and their terminal connections, and variable parts according to circuit regulations must be prepared by changing the type of circuit unit 31 and providing a menu. If there is such a change, the circuit unit 31 must also be replaced.

(2) In addition to the interface circuit, the circuit unit 31 is also equipped with channel circuits, etc., and replacing the circuit unit 31 is expensive.

■ When adding a new menu of interface circuits, the circuit unit 31 must be newly designed, which requires additional design and manufacturing steps.

There are other problems.

SUMMARY OF THE INVENTION In view of these problems, the present invention aims to provide a connection mechanism that is easy to handle, including changes in interface circuit regulations, has a simplified mechanism, and is low in cost.

[Means for solving problems]

As shown in the principle block diagram of FIG. 1, the above problem is common in the multimedia multiplexing device 2, which is equipped with a wide variety of interfaces and can be connected to a variety of external connection devices, for example, various data terminals. The circuit section is composed of a circuit unit 3 mounted on a standardized printed wiring board, and a shelf 1 mounted on the device housing, on which the circuit units 3 are plug-in mounted, and a plurality of them are housed and interconnected. An interface board 7 in which input/output regulation individual circuits 5 and connection connectors 6 defined for various interface conditions are mounted together is provided with a menu of all connectable types.

An interface selected in accordance with a desired external connection device is inserted from the opposite side onto a backboard 4 provided on the shelf 1, which has a printed wiring board as a substrate, to which the circuit unit 3 is connected by plug-in and mutual wiring connections are made. The panel 7 is connected by plug-in, and the connection wiring 8 from the external connection device is connected to the mounted connection connector 6.

Further, the interface board 7 is equipped with an interface connection mechanism that can be detachably attached so that it can be increased or decreased in accordance with the increase or decrease in the number of circuit units 3 to be mounted, and can be replaced in accordance with the external connection device to be connected. The problem is solved by the inventive multimedia multiplexing device.

[For production]

That is, the variable parts depending on the type of interface are all mounted on a detachable interface board, so the objective is achieved.

The line set section of the multimedia multiplexing device can be classified as follows.

The common part houses the digital processing part common to each interface, and is always a fixed circuit component 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, connector shapes and terminal connections for connection with external connection devices,
Both are defined 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, in which the line set common part and other circuits are mounted on the circuit unit 3, and all the line set variable parts are mounted on the interface board 7. A separate interface circuit and a connection connector 6 for connection to connection wiring 8 from an external connection device are mounted.

In the shelf 1, the circuit unit 3 is inserted from the front, and the interface board 7 is inserted from the back. Plug-in connections are made to both sides of the internal backboard 4, and the printed wiring on the backboard 4 connects the two. A connection wiring 8 from an external connection device is connected to the connector 6.

All the variable parts of the interface are integrated into the interface board 7 and organized into menus, so you only need to select and use the interface board 7. It has a structure that can be easily attached and detached by plug-in connection, and the number of circuit units 3 to be mounted, i.e. , it can be increased or decreased according to the number of connected lines, and since only the variable parts are implemented, the cost of replacement is minimal.

Furthermore, in the case of adding a new interface, a new design of only the interface board 7 is sufficient, and manufacturing can be completed in a short time.

In this way, it is possible to provide a connection mechanism that is easy to handle, including changes in the interface circuit regulations, and has a simplified mechanism and reduced costs.

〔Example〕

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

The same reference numerals indicate the same objects throughout the figures.

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

The configuration of this embodiment is such that a circuit unit 3 constituting a common circuit section and a specified individual circuit 5 for an interface are mounted on a printed wiring board 71, and a connector 6 for connecting with physical conditions is mounted at the end of the printed wiring board 71.
It consists of an interface board 7 which is provided with a circuit connected thereto and a connector 72 for plug-in connection at the opposite end, and a shelf 1 on which both are mounted.

The shelf 1 has a circuit unit 3 from the front, an interface board 7 from the rear, and a printed wiring board provided in the center with a press-fit pin connector 44 penetrating through and forming contacts at both ends. It is connected by plug-in to a backboard 4 made of a board.

They are connected to each other via this backboard 4 to form a predetermined interface.

One side of the connector 44 on the backboard 4 is connected to the circuit unit 3, and the other side is plug-in connected to the connector 72 on the interface board 7, so two separate connectors can be attached to both sides and wiring connections can be made using printed wiring. is omitted, and there is an advantage that the interface board 7 is mounted in correspondence with the number of circuit units 3 mounted.

The interface board 7 has an interface input/output regulation individual circuit 5, a physical connection mechanism connector 6, and its terminal connections.As for the physical connection mechanism, the EI^ R5232C has a 25P connector, and the EI^ R5449TE has a 25P connector. 3
7P: l connector, CCITT (7) V35 Te is 3
The connection/disassembly point with an external connection device, such as the 41' connector, must be a standard-compliant connector, and for this reason all types of interfaces that can be connected are prepared in a menu.

The above embodiment shows one 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 those described above.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to provide a connection mechanism that is easy to handle, has a simplified structure, and is low in cost, including changes in its circuit regulations, for various types of interfaces. It can make a great contribution to the manufacture and operation of multiplexing equipment.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the basic configuration 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 an example of a conventional external line connection mechanism. In the figure, 1.1) 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 connection 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 fixing plate, 88 is a fixing frame, and 89 is an interface conversion unit.

Claims (1)

[Claims] In a multimedia multiplexing device (2) equipped with a wide variety of interfaces so as to be connectable to various external devices, for example, various data terminals, a common circuit section is connected to a standardized printed wiring. A board-mounted circuit unit (3) and a shelf (1) on which the circuit unit (3) mounted on the device housing is plug-in mounted, and a plurality of the circuit units (3) are housed and interconnected.
An interface board (7) consisting of the following and mounting together input/output regulation individual circuits (5) and connection connectors (6), which are defined for each type of connection interface condition.
A back with a printed wiring board as a substrate, which is provided with a menu of all types that can be connected, and which is provided on the shelf (1), to which the circuit unit (3) is plug-in connected and interconnected. The interface board (7) selected according to the desired external connection device is plug-in connected to the board (4) from the opposite side, and the connection from the external connection device is made to the mounted connection connector (6). Wiring (8)
An interface to which the interface board (7) is detachably attached so that it can be increased or decreased according to the increase or decrease in the number of circuit units (3) mounted, and can be replaced in accordance with the external connection device to be connected. A multimedia multiplexing device comprising a connection mechanism.