JPH0652952A - Data bus network system - Google Patents

Abstract

PURPOSE:To provide a bus network cable, on which an elastic contact of function socket is constantly abutted, in which disconnection does not occur when a function plug is not inserted, and by which an apparatus is linked by inserting the plug. CONSTITUTION:A function socket 3 on which an opposed elastic contact group 5 is normally abutted, is provided on a closet 4, and a BNC connector 2 to be linked with a common bus network cable 1, is provided on the closet 4. The BNC connector 2 and the function socket 3 are connected together, and a connection cable 6 for linking between the socket 3 and an information unit 24, is formed of a twin coaxial cable. A function plug 9 of the cable is formed of a contact group 8 corresponding to the elastic contact 5, and a BNC connector 27 is mounted on the other end of the cable. The system is easily expanded or modified only by inserting the function plug of the cable to be connected to the unit 24, in the socket 3. Even when the plug 9 is not inserted, an elastic contact pair are abutted, and even when the plug is to be drawn out, the bus network cable 1 is not disconnected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data bus network system in a LAN system which is a data communication network between information devices.

[0002]

2. Description of the Related Art Two BNC sockets are arranged in a closet in which input side and output side BNC connectors are arranged. Connect each BNC connector to the bus net cable. When not connecting information equipment to this closet, install a jumper wire between both BNC sockets to prevent the bus net cable from being interrupted. Prepare two coaxial cables that have a BNC plug and a BNC connector at both ends, fit this BNC connector into the T-shaped connector of the information device, and fit the BNC plug into the BNC socket.

[0003]

When moving the information equipment, the closet and the bus net cable will be changed, but the bus net cable cannot be used during this period. There are many cases where you forget to insert a jumper wire into a closet that you do not use, or you forget it by accidentally pulling it out. In a large-scale bus net cable, it takes a long time to find a trouble point, which has a great influence on information management.

[0004]

[Means for Solving the Problems] A plurality of functional sockets, which are normally contacted by opposing elastic contact groups, are arranged in a closet, and two connectors for connecting to a common bus net cable are arranged in this closet. A pair of elastic contact pairs is used as a signal line and the remaining one pair of elastic contact pairs is used as a ground line to connect to two connectors. Attach it to one end of the cable, secure a round-trip line to the connector at the other end, and connect this connector to the connector of the information device.

[0005]

When the function plug is not inserted in the function socket, the bus net cable is in a conductive state from the closet connector to each function socket to the outlet connector. The connection with the bus-net cable connected to the outlet connector is ensured by the abutment of the elastic contacts. Since the elastic contacts having appropriate elasticity are in contact with each other facing each other, the electrical connection between both contacts is secured unless the functional plug is inserted. Since the two elastic contact pairs of the signal line are arranged in parallel with each other, the communication line is secured even if dust or the like is attached to one elastic contact pair and electrical connection becomes impossible. Since the elastic contacts of the earth line (third stage in FIG. 4) are both connected to the earth ground line of the board, it is not always necessary for the elastic contacts of the pair to abut. When the function plug at the end of the connection cable is inserted into the function socket of the closet, the information equipment and the bus net cable are connected via the twin coaxial cable. The twin coaxial cable is an integrated reciprocating coaxial cable, and a communication line is formed from an elastic contact to an information device and from this information device to a pair of elastic contacts.

[0006]

[Example] Two BNs connected to the bus net cable 1
Place the C connector 2 and the two functional sockets 3 in series between the BNC connectors 2 in the closet 4. The functional socket 4 is made by contacting elastic contacts 5 with appropriate elasticity facing each other, and basically consists of two sets, one for a signal line and the other for a ground line. The elastic contacts 5 that make a pair, like the functional socket 3 on the right side of FIG. 3, are in firm contact. The center contact 20 of the BNC connector 2 is connected to the signal line of the bus net cable 1, and this center contact 20 is connected to the elastic contact 5 for the signal line via the conductive path of the board 21. The ground line of the bus net cable 1 is connected to the sleeve contact 22 of the BNC connector 2 and the elastic contact 5 for the ground line through the conductive path of the board 21. As shown in FIG. 2, each elastic contact 5 is attached to the substrate 21.
A group is planted and a BNC connector 2 is placed adjacent to it
It is placed horizontally with respect to 21 and parallel to each other. A plurality of hook holes 23 are arranged on the upper part of the housing of the function socket 3 to prevent insertion of a function plug other than the correct one. In the present embodiment, a pair of elastic contact pairs for signal lines are further arranged in parallel. This is to prevent the signal line from being interrupted by the presence of dust or the like between the opposing elastic contacts.

Next, the connection cable 6 connecting the functional socket 3 and the information device 24 will be described. A twin coaxial cable is formed by shielding the reciprocating signal line wire 25 and the earth line wire 26, and a functional plug 9 consisting of a group of contacts 8 facing each other on the insulating spacer 7 is attached to the tip of the twin coaxial cable. As shown in Fig. 4, two pairs of contacts are connected in parallel in the same manner as the corresponding elastic contact pairs, and the twin coaxial cable reciprocating signal line wires.
Connected to 25. This reciprocating signal line 25 is the center contact of the BNC connector 27 at the other end of the twin coaxial cable.
Join at 28. That is, the contact pairs of the functional plug 9 meet at this central contact point 28. The earth line contact pair is connected to the sleeve contact 29 of the BNC connector 27 via the earth line wire 26. It is a feature of the present invention that a twin coaxial cable is adopted as the connection cable 6 and the signal line 25 and the earth line 26 of the round trip path are shielded from each other.

Before the functional plug 9 is inserted, the functional socket 3 is kept in a short-circuit state by the contact of the elastic contact 5, and both the BNC connectors 2 of the closet 4 are electrically connected. As shown in Fig. 3, when the functional plug 9 is inserted into the functional socket 3, the elastic contact pairs are separated, but one elastic contact 5 is the contact 8 of the functional plug 9,
The signal line 25, the center contact 28 of the BNC connector, and the signal line 25 on the return path, and the other elastic contact
Will be connected to 5. Data from the information device 24 is transmitted to the bus net cable 1 via the signal line 25.

The BNC connector 27 at the tip of the twin coaxial cable is replaced with the BNC connector 2 of another closet 4.
Two functional sockets in this closet when connected to
3 becomes available. If you do not connect the bus net cable 1 to the BNC connector 2 on the exit side of the closet, use the 50 ohm terminator switch
Attach to NC connector 2.

[0010]

In summary, the present invention closes the functional socket 3 with which the opposing elastic contact groups normally abut.
Placed at 4 and connected to common bus net cable 1 B
A connection cable that connects the NC connector 2 to the closet 4, connects the BNC connector 2 to the function socket 3, and connects the function socket 3 to the information device 24.
6 is formed by twin coaxial cable, the functional plug 9 at the tip of this twin coaxial cable is formed by 8 groups of contacts corresponding to the above elastic contact 5, and the BNC connector 27 is attached to the other end of this twin coaxial cable.
Simply insert the functional plug 9 of the twin coaxial cable to connect to 24 into the functional socket 3 of the closet,
You can easily expand or change the system. Even if the function plug 9 is not inserted in the function socket 3, the elastic contact pair is in contact with the function socket 3, so that the disconnection of the bus net cable 1 is prevented even when the function plug is pulled out.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view.

FIG. 2 is a sectional view.

FIG. 3 is a conceptual explanatory diagram of a closet.

FIG. 4 is an explanatory diagram of a function socket and a function plug.

[Explanation of symbols]

 1 Busnet cable 2 BNC connector 3 Function socket 4 Closet 5 Elastic contact 6 Connection cable 8 Contact 9 Function plug 20 Center contact 21 Board 23 Hook hole 24 Information equipment 25 Signal line wire 26 Ground line wire 28 Center contact

Claims (3)

[Claims] 1. A functional socket with which opposing elastic contact groups normally abut is arranged in a closet, and a connector linked to a common bus net cable is arranged in this closet, and this connector and the functional socket are connected to each other. A data bus network system in which a functional plug of a twin coaxial cable that connects a functional socket and an information device is formed by a contact group corresponding to the elastic contacts, and a connector is attached to the other end of the twin coaxial cable. 2. A plurality of functional sockets, which are normally contacted by opposing elastic contact groups, are arranged in a closet, and two connectors for connecting to a common bus net cable are arranged in this closet, and two sets of elastic contact pairs are provided. Connect one pair of elastic contact pairs as signal lines to two connectors as earth lines, and have three pairs of contact pairs insulated from each other, and have a functional plug that fits into the above functional socket at one end of the twin coaxial cable. A data bus network system that secures a reciprocating line to the mounting and other end connectors and connects this connector to the connector of information equipment. 3. A functional socket in which opposing elastic contact groups normally abut is arranged in a closet, and a connector connected to a common bus net cable is arranged in this closet, and two elastic contact pairs are used as signal lines. Connect the remaining one pair of elastic contact pairs to two connectors as earth lines, attach three pairs of mutually insulated contact pairs to the above function socket, and attach the function plug to one end of the twin coaxial cable. A data bus network system that secures a round-trip line to the end connector and connects this connector to another similar closet connector.