JPH01140797A - External connection mechanism for electronic device - Google Patents

Abstract

PURPOSE:To simplify a mechanism and to reduce its cost without losing the advantage of easy handling by employing a flexible replacement cord, increasing or decreasing it in response to the number of circuit units to be mounted, and exchangeably, detachably mounting it in response to an external unit to be connected. CONSTITUTION:Connectors 5 in which connecting circuits of all types of external units are gathered at each circuit unit 3 are provided on a back board 4 made of a printed circuit substrate for plug-in connecting the units 3. A flexible replacement cord 8 in which the terminals of both connectors 6, 7 are connected is increased or decreased in response to the number of the units 3 to be mounted by the connectors 6 to be connected to the connectors 5 and the designation connector 7 to match the interface condition determined by the external units of opponent connectors, and the cord 8 is detachably mounted to replace in response to the external units of the opponent connectors.

Description

[Detailed Description of the Invention] [Summary] Regarding an external line connection mechanism for an electronic device that can easily adapt to various connection conditions determined by the connected device, it is easy to handle, the mechanism is simplified, and the cost is reduced. In an external line connection mechanism for an electronic device in which a circuit unit having a circuit configuration that can be connected to various external devices is mounted by a plug-in connection, a backboard consisting of a printed wiring board to which the circuit unit is connected by a plug-in is installed. A connector is provided that collects connection circuits for all types of external devices in each circuit unit, and a connector that fits and connects to this connector and a specified connector are used to connect both external devices according to the predetermined connection conditions. A flexible conversion cord is used to connect the connectors, and the conversion cord is detachably attached so that it can be increased or decreased depending on the number of circuit units mounted, and can be replaced depending on the external device to be connected. .

[Industrial application field]

The present invention relates to an external line connection section of an electronic device, and more particularly, to an external line connection mechanism for an electronic device that can easily accommodate various connection conditions determined by the external device to be connected.

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

These terminals include all kinds of information terminals, such as data terminals, personal computers, word processors, facsimile machines, and telephones, and their interfaces are those that conform to one of several types of interfaces in international recommendations. This interface also defines physical conditions such as connectors and their terminal connections.

Therefore, the electronic device for the terminal office must not only have a circuit configured to meet various international interfaces, but also be equipped with a connector whose circuit is connected to the terminal as specified as an external line connection mechanism.

[Conventional technology]

FIG. 2 shows a perspective view of an example of a conventional external line connection mechanism.

The example electronic device 21 to which a wide variety of multiple external devices 1 can be connected is a multimedia multiplexing device for a high-speed digital dedicated line, and includes a circuit unit 3 in which a circuit is configured by mounting a printed circuit board, and a plurality of external devices 1. It consists of a subrack 91 on which the circuit unit 3 is plug-in mounted, an interface converter 99 provided at the rear of the subrack 91, and other parts.

In the subrack 91, the circuit unit 3 is inserted from the front side, 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 by printed wiring. Connections with the outside are made through this backboard 41.

There are many types of external devices on the terminal side, and various interface connection conditions, and in order to easily connect to any of these devices, an interface conversion section 99 is provided.

This consists of a frame 98 provided back to back on the rear surface of the subrack 91, and a frame 98 that is guided and inserted into the frame 98, and is provided on the backboard 41. All connection circuits with external devices are wired for each circuit unit 3. , and a conversion panel 97 made of a printed wiring board, which is connected to the connector 51 by plug-in.

The conversion panel 97 is made of a printed wiring board 96, and has a connector 61 at one end for plug-in connection to the connector 51.
A designated connector 71 for each external device is mounted on the other end, and predetermined terminals are connected by printed wiring.

Therefore, the conversion panel 97 has a menu of devices that are equipped with connectors 71 that correspond to various interfaces of external devices.

In this way, by knowing the type and number of interfaces of the external device to be connected, the number of circuit units 3 to be mounted and the number of conversion panels 97 by type can be determined, and the connectors 51 corresponding to the mounting positions of the circuit units 3 can be determined. When each conversion panel 97 is plugged in, the connector 71 is aligned on the back side of the electronic device 21 and connected to each predetermined external device.

[Problem that the invention seeks to solve]

However, (1) this conversion panel 97 uses a printed wiring board 96, which is expensive.

(2) The frame 98 is also a mechanism for plug-in guiding the conversion panel 97 and holding and fixing it, which is expensive.

There are other problems.

In view of these problems, the present invention aims to simplify the mechanism and realize cost reduction without sacrificing the advantage of ease of handling of the conventional example.

[Means for solving problems]

The above problem, as shown in FIG. In the external line connection mechanism of the device 2, a backboard 4 made of a printed wiring board to which the circuit unit 3 is connected by plug-in is provided with a connector 5 in which connection circuits for all types of external devices are assembled for each circuit unit 3. , a flexible connector 6, which is mated and connected to the connector 5, and the terminals of both connectors 6.7 are connected using a specified connector 7 according to the determined interface conditions of the external device to be connected. Conversion code 8
An external line connection for an electronic device according to the present invention, in which a conversion cord (8) is detachably attached so that it can be increased or decreased depending on the number of circuit units 3 mounted and replaced according to the external device to be connected. This is solved by the mechanism.

[Function] That is, by replacing the printed wiring board with a flexible cord, the holding structure can be simplified and the purpose can be achieved.

As shown in Fig. 1, circuits for all types of interfaces that can be connected are concentrated in a connector 5 provided on the backboard 4, and in order to convert this to the designated connector 7 of the external device to be connected, a conversion code is required. 8 is used.

As a result, the printed wiring board 96 is not used as in the conversion panel 97 of the conventional example described above, and the insertion guide mechanism of the conversion panel 97 and the structure with dimensional accuracy for plug-in mounting, such as the frame 98, are not required. Therefore, the structure can be simplified and costs can be reduced.

[Example] The present invention will be specifically described below with reference to Examples shown in the drawings.

Like numbers refer to like objects throughout the design.

FIG. 1 shows a perspective view of an embodiment of the present invention.

The electronic device 2 of this embodiment is an example of a multimedia multiplexing device for a terminal station, which is used for a digital dedicated line, as in the conventional example described above.

The electronic device 2 includes a circuit unit 3 in which circuits are mounted on a printed board, a subrack 9 in which a plurality of circuit units 3 are plug-in mounted, and an interface converter 89 provided at the rear of the subrack 9. Consists of other parts.

The circuit unit 3 is inserted into the subrack 9 from the front,
The connectors are plug-in mounted on a backboard 4 made of a printed wiring board on the rear side, and interconnected using printed wiring, and connections to the outside of the circuit are made on this backboard 4. ing.

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

This consists of a fixed frame 88 provided back to back on the rear surface of the subrack 9, and a fixed frame 88 that is held and fixed in the fixed frame 88, and all connection circuits with external devices are wired for each circuit unit 3 provided on the backboard 4. , conversion cord 8 to be connected to connector 5
It consists of

The conversion cord 8 has a hook-equipped connector 6 attached to one end that fits into the connector 5, is locked in the connected state, and can be easily attached and detached, and the other end is attached with a connector 7 designated for each external device. are fixedly attached to a short metal fixing plate 87, and predetermined terminals are connected by flexible cords.

Therefore, in this case, one circuit unit 3 is connected to two external devices, and the conversion cord 8 is equipped with a connector 7 that is compatible with various interfaces of external devices. is displayed as a menu as a device.

The fixing frame 88 is a metal frame that has a rectangular shape that is approximately the same as the rear surface of the subrack 9 and is attached to the lower edge of the fixing frame main body so that it can be rotated backwards. 87
It is equipped with a tapped hole for fixing.

In this way, once the type and number of interfaces of the external device to be connected are known, the number of circuit units 3 to be mounted and the number of conversion codes 8 by type are determined, and the metal frame of the fixed frame 88 is opened rearward to open the circuit. By connecting each conversion cord 8 to the connector 5 corresponding to the mounting position of the unit 3, returning the fixing frame 88, and fixing the fixing plate 87, the connectors 7 are aligned on the back side of the electronic device 2, and each predetermined Connected to external devices.

The above embodiment shows an example, and the connector 5 attached to the backboard 4 is also provided on the backboard 4. One side is a connector for plug-in connection of the circuit unit 3, and the other side is used as a connection terminal of the connector. , a press-fit pin connector may be used, or a flat cable may be used as the flexible cord to streamline wiring work and reduce costs.

[Effects of the Invention] As described above, the present invention can be easily connected to various types of interfaces, has a simple structure, and can reduce costs, which has great effects.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of a conventional external line connection mechanism. In the figure, 2.21 is an electronic device, 3 is a circuit unit, 4.41 is a backboard, 5.6, 7, 51, 61.71 are connectors, 8 is a conversion cord, 9.91 is a subrack, 87 is a A fixed plate, 88 a fixed frame, 89 and 99 an interface conversion section, 96 a printed wiring board, 97 a conversion panel, and 98 a frame. ? Nobuko Kago layer Shinkikoma-kei martyrdom 1 min 8 Perforation-1 (branch) Spear 22

Claims (1)

[Scope of Claims] An electronic device (2) in which at least one circuit unit (3) configured to be connectable to various external devices, such as a data terminal, is mounted through a plug-in connection. In the external line connection mechanism, a backboard (4) consisting of a printed wiring board to which the circuit unit (3) is plug-in connected is provided with connection circuits for all types of external devices for each circuit unit (3). A set of connectors (5) is provided, and a designated connector (7) is used according to the determined interface conditions of the connector (6) that is fitted and connected to the connector (5) and the external device to be connected, Both connectors (
6) Using a flexible conversion cord (8) connected between the terminals of (7), increase or decrease it according to the increase or decrease in the number of circuit units (3) mounted, and connect it to the external device to be connected. An external line connection mechanism for an electronic device, characterized in that the conversion cord (8) is detachably attached so that it can be replaced accordingly.