JPS6394567A - Transmitter/receiver - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] "Field of industrial application" Office automation
ation:OA) traffic, these O
Organically connect devices A with a local area network (L).
A N) has been receiving particular attention recently. Although there are various configuration systems for this LAN, the present invention is particularly suitable for a transmitting/receiving device for a bus type LAN in which a plurality of terminals (stations) are connected to one serial bus. Regarding.

"Prior Art and Problems" In recent years, with the development of office automation (OA), various LAN systems that organically connect these OA devices have been attracting attention.

One of these systems is the bus system (E thernet system; E th
ernet is a registered trademark of X E ROX Corp)
It has been known.

This LAN system consists of a transmission/reception device (transceiver) equipped with a transmission line (generally a single-core coaxial cable) and a data conversion means consisting of a shift register, buffer memory, etc.
The transceiver and the terminal device are connected by a multi-core interface cable. And, as the above-mentioned system, U
Disclosed in detail in S P 4063220,
Furthermore, the coaxial cable connector (COAXIAL CABLE TAP) used in this system
C0NECT01N), USP 4266
842, USP 458g249, and further disclosed in USP 3105g73 as a coaxial cable connector for use in other systems.

The interface cables and transmitting/receiving devices mentioned above not only satisfy essential performance such as not causing data loss or having sufficient durability, but also when connecting to transmission lines when adding terminal equipment, etc. There is a need for easy installation.

In addition, there is a demand for ensuring reliable transmission by minimizing the number of locations where connectors are used, which are likely to cause problems such as poor contact and radiation noise.

The present invention was proposed in view of the above circumstances, and it is easy to attach to a coaxial cable as a transmission line and has high durability, and it also has a connector that can cause trouble.
The object of the present invention is to provide a transmitting/receiving device in which the number of locations (contact points) is kept to the necessary minimum.

"Means for Solving Interlayer Points" In order to achieve the above object, the present invention provides terminals for inputting and outputting signals to be transmitted and received between a coaxial cable and a terminal device, and also provides for inputting and outputting signals to and from these terminals. A circuit section integrally equipped with a circuit for mutually converting signals is mounted on a reinforcing plate, and from first and second contacts connected to each terminal of the circuit section and electrically insulated from each other. A connecting means is provided protruding from the reinforcing plate, and the circuit portion, the connecting portion between the circuit portion and the interface cable, and the reinforcing plate are integrally molded with synthetic resin to constitute the main body portion, and the main body portion , an upper clamp having a recess into which the coaxial cable is fitted, and a lower clamp that holds the coaxial cable between the upper clamp and the upper clamp are integrally attached via a fastening means; - Protruding first and second connecting means are connected to the second contact and protrude into the recess to contact the center conductor and outer conductor of the coaxial cable, respectively. be.

"Operation" In the transmitting/receiving device configured as described above, by fastening the upper and lower clamps together, the coaxial cable is held between the first and second clamps, and at the same time, the coaxial cable is held between the first and second clamps. Two connecting means are connected to the outer conductor and center conductor of the coaxial cable, respectively. Also, since the end of the interface cable is directly connected to the circuit,
The number of connectors, ie, contacts, interposed between one coaxial cable terminal device can be minimized.

"Example" Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 3 show a first embodiment of the present invention, and what is indicated by the reference numeral l in the figures is an integrated circuit section (hereinafter referred to as IC in the embodiments) consisting of, for example, a hybrid IC. This ICI transmits and receives signals between the transmission line 2 and the terminal (path shown) and converts data between the two. It is equipped with a large number of lead wires 4 connected to the multi-core cable 3 used.

The lead wires 4 of the ICI are attached to a printed circuit board 5, and the printed circuit board 5 is further fixed by a bolt 7 to a substantially central portion of a reinforcing plate 6 made of metal or the like. The reinforcing plate 6 is connected to one of the lead wires 4 (earth lead wire) of the rC1 and used as a ground line. Further, the printed circuit board 5 is provided with electrode plates (paths shown in the figure) which are respectively connected to the lead wires 4, and the center conductor 3a of the interface cable 3 or the connecting wire 8 is connected to the electrode plates. It is supposed to be done.

At the tip of the reinforcing plate 6, there is a cylindrical contact 6a connected to the ground line via the reinforcing plate 6, and a cylindrical contact 6a embedded in an insulator 6b provided in the contact ○a. A connecting portion consisting of a contact 6c connected to the connecting wire 8 is provided, and the connecting portion is adapted to be engaged with a push-in plug 9. The push-in plug 9 includes a plug portion 1O that is brought into contact with the reinforcing plate 6 via the contact 6a, and a pin that is attached to the plug portion 1O in an electrically insulated state and connected to the contact 6C. It consists of 11. The push-in plug 9 is screwed into a socket 12, and the socket 12 is fixed to an upper clamp 14 fixed to the reinforcing plate 6 via a fastening means (bolt) 13.

The upper clamp 14 is made of a conductive material such as metal, and has a half-shaped recess 15 into which the transmission line l is fitted, as shown in FIG.
A plurality of spikes 16 are provided to protrude through the sheath 2b of the transmission line 2 and come into contact with the outer conductor 2c inside the sheath 2b.

A female screw 17 is formed in the upper clamp 14, and by screwing a fastening means (bolt 18) into the female screw 17 and attaching the lower clamp 19, the transmission line 2 is held between the upper and lower clamps 14 and 19. At the same time, the spike 16 is connected to the external conductor 2c, and the pin 1 of the push-in plug 9 is inserted into the connection hole 20, which is provided by removing the sheath 2b and the external conductor 2c of the transmission line 2.
1 is inserted, and further penetrates an insulating layer 2d provided inside the outer conductor 2c to be connected to the center conductor 2a.

On the other hand, a holding plate 21 curved into a ring shape is formed at the base end of the reinforcing plate 6, and this holding plate 21 holds the tip of the interface cable 3.

Furthermore, the connection points between the ICI, the reinforcing plate 6, and the IC1 (printed circuit board 5) and the interface cable 3 are covered with a covering material 22 made of hard plastic or the like, which is integrally formed into a ring. It forms the main body part.

Note that when molding the coating material 22, in order to protect the ICI, a resin with a relatively low melting temperature is used to protect the ICI.
It is desirable to perform a two-step molding process in which the periphery of the covering material 22 is coated, and then the outside is coated with a synthetic resin having the necessary strength to complete the covering material 22.

When manufacturing a transmitting/receiving device configured as described above, first, attach the ICI to the printed circuit board 5, fix this tCt and the push-in plug 9 to the reinforcing plate 6, and then connect the center conductor 3a of the interface cable 3. Alternatively, the connecting wire 8 to the push-in plug 9 may be fixed to the printed circuit board 5, and in this state, a two-step molding process is performed to complete the covering material 22. Then, by attaching the upper clamp 14 while connecting the push-in plug 9 to the contacts 6a and 6c on the main body side, the device is ready for use.

Note that the fastening means for connecting the main body portion, the upper clamp, and the lower clamp to each other is not limited to the bolt of the above-mentioned embodiment, but may be a fastening method using elastic force of Bj3, for example.

"Effects of the Invention" As is clear from the above description, the present invention includes terminals for inputting and outputting signals to be transmitted and received between a coaxial cable and a terminal device, and also for transmitting and receiving signals to and from these terminals. A circuit section integrally equipped with a mutually converting circuit is mounted on a reinforcing plate, and a connecting means consisting of first and second contacts connected to each terminal of the circuit section and electrically insulated from each other is provided. The coaxial cable is provided protruding from the reinforcing plate, and the circuit portion, the connection portion between the circuit portion and the interface cable, and the reinforcing plate are integrally molded with synthetic resin to constitute a main body portion, and the coaxial cable is provided on the main body portion. An upper clamp having a recess into which the coaxial cable is fitted, and a lower clamp that protects the coaxial cable between the upper clamp and the upper clamp are integrally attached via a fastening means, and the first and second clamps are attached to the upper clamp. The first and second connecting means are respectively connected to the contacts of the coaxial cable, and protrude into the recess to contact the center conductor and the outer conductor of the coaxial cable, respectively. It has the following effects.

(i) When attempting to connect a transmission line and a terminal device, the work can be completed simply by connecting the transmission side connector to the transmission line.

(ii) There are only two points of contact between the transmission line and the terminal equipment: between the transmission line and the transmission-side connector, and at the connector at the end of the interface cable, resulting in poor contact. is unlikely to occur.

(iii) Since the connection portion between the interface cable and the IC is integrally molded, disconnection is less likely to occur and reliability is improved.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
FIG. 1 is a longitudinal sectional view, FIG. 2 is a plan view, and FIG. 3 is an exploded perspective view of the clamp. l...Circuit section, 2...Coaxial cable,
2a...center conductor, 2b...sheath,
2c...External conductor, 3...Interface cable, 3a...Conductor, 5...
・Printed circuit board, 6... Reinforcement plate, 6a...
...Contact element, 6b... Sewn body, 6C...
・Contactor, 9... Push-in plug, 12...
... Socket, 14 ... Upper clamp, 15
...Recess, 16...Spike.

Claims (1)

[Claims] In a transmitting/receiving device that is provided between a coaxial cable as a transmission line and an interface cable connected to a terminal device that communicates via the coaxial cable and connects the two, the coaxial cable (2) and the terminal device A circuit unit (1) equipped with terminals for inputting and outputting signals to be transmitted and received between the two and integrally equipped with a circuit for mutually converting signals input and output from these terminals, and a circuit unit (1) on which the circuit unit is installed. A connection means consisting of a reinforcing plate (4), and first and second contacts (6a and 6c) protruding from the reinforcing plate, respectively connected to terminals of the circuit section and electrically insulated from each other; , a concave portion (15) into which the coaxial cable is fitted into a main body portion formed by integrally molding the circuit portion and the connection portion of the interface cable (3) with synthetic resin;
an upper clamp (14) having an upper clamp; and a lower clamp (19) holding the coaxial cable between the upper clamp and the upper clamp.
are integrally attached via fastening means (13, 18), and the upper clamp is connected to the first and second contacts, respectively, and protrudes into the recess to connect the coaxial cable. A transmitting/receiving device characterized in that first and second connecting means (11 and 16) are provided in a protruding manner so as to be brought into contact with a center conductor and an outer conductor, respectively.