JP3976122B2 - Multiple communication joint connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a multiplex communication joint connector, and more particularly to an improvement for improving the productivity of a multiplex communication joint connector used when a plurality of terminal communication devices are branched and connected to an in-vehicle multiplex communication bus line.
[0002]
[Prior art]
In recent years, the number of equipment using electric signals for operation control has increased, and further, with the enhancement of the functions of these equipments, it has become necessary to exchange a large amount of control signals.
With the increase in the amount of information due to electrical signals between such on-vehicle electrical components and the control device, signal transmission cables are individually laid for each conventional electrical component. There are many inconveniences such as a large number and difficulty in laying, and at the same time, it is difficult to recover from a failure such as a disconnection.
[0003]
Therefore, recently, a plurality of in-vehicle electrical components have a communication function capable of transmitting and receiving information based on a predetermined communication protocol, and control signals for these multiple electrical components are placed on a common bus line. By multiplexing and sending out, the number of signal transmission cables installed in the vehicle is reduced.
[0004]
3 and 4 show a bus line for multiplex communication in order to control a plurality of electrical components by CAN (Control Area Network) communication which is widely used as a multiplex communication protocol for an in-vehicle network that has been standardized in recent years. The conventional example of the joint connector for multiplex communication used for the network connection with a several electrical component is shown.
As shown in FIG. 3, the multiplex communication joint connector 1 shown here is provided separately for each of the connector housing 3 having a plurality of connector fitting portions 3a opened on the upper surface and each connector fitting portion 3a. Connecting terminal 5, printed wiring board 7 accommodated in connector housing 3, and termination resistor circuit 9 having components mounted on printed wiring board 7.
[0005]
Among the plurality of connector fitting portions 3a provided in the connector housing 3, some are used as bus connection ports for connecting a bus line for multiplex communication, and the remaining are terminal communication devices. Used as a terminal connection port to connect.
As shown in FIG. 4, the electrical connector connection between the connection terminal 5 and the bus line or the terminal communication device in each connector fitting portion 3a is performed via the male connector 11 fitted to each connector fitting portion 3a. Done.
[0006]
The terminal communication device connected to the connector fitting portion 3a is specifically various in-vehicle electrical components having an interface for CAN communication.
The connector housing 3 includes a housing body 15 having a connector fitting portion 3a on the upper surface and an open lower portion, and a lower cover 16 that covers an open portion of the lower portion of the housing body 15. The housing body The printed wiring board 7 is accommodated and held between the cover 15 and the lower cover 16.
[0007]
A through hole 7 b is formed through the insulating substrate 7 a of the printed wiring board 7 so that the lead of the connection terminal 5 and the lead of the electronic component constituting the termination resistor circuit 9 are inserted therethrough. A joint circuit is formed on the back surface of the insulating substrate 7a by a copper foil to electrically connect the leads inserted through the through holes 7b.
The joint circuit on the printed wiring board 7 is a circuit that electrically connects the connection terminals 5 of the connector fitting portions 3a in order to branch-connect terminal connection ports to the bus lines.
[0008]
Each connection terminal 5 having a lead inserted into the through hole 7b can be fixed to the printed wiring board 7 and electrically connected to a joint circuit by soldering to the through hole 7b.
The termination resistor circuit 9 on the printed wiring board 7 is used to prevent inconvenience due to signal reflection at the end of the bus line when the multiplex communication joint connector 1 is used at the end of the bus line. A circuit connected to the joint circuit.
[0009]
As shown in FIG. 5, the terminating resistor circuit 9 includes a first resistor 21, a second resistor 22 connected in series to the first resistor 21, and one lead having the first and second leads. The capacitor 23 is connected between the resistors 21 and 22 and the other lead is grounded, and has substantially the same impedance as the bus line. The capacitor 23 absorbs high-frequency vibration when a communication signal transmitted through the bus line passes through the first and second resistors 21 and 22.
[0010]
[Problems to be solved by the invention]
However, in the conventional joint connector for multiplex communication 1 described above, all the connection terminals 5 arranged in each connector fitting portion 3a must be soldered to the printed wiring board 7 one by one. There are so many that productivity is not good.
That is, in order to obtain a sufficient bonding strength that can withstand vibrations applied to the vehicle during traveling at a soldering location on the insulating substrate 7a, the connection terminal 5 is not tilted or a soldering failure with a low bonding strength does not occur. Strict quality control and checks are required for soldering points. Therefore, if there are many soldering points, there is a problem that the quality control and checking take a lot of time and the productivity is lowered.
[0011]
Accordingly, an object of the present invention is to solve the above-mentioned problems, and it is possible to improve productivity by reducing the number of soldering points and reducing the labor for quality control of the soldering points. Is to provide a joint connector.
[0012]
[Means for Solving the Problems]
The object of the present invention is to provide a connector housing having a plurality of connector fitting parts to which connector lines are connected to a bus line for multiplex communication and terminal communication equipment, and a connection terminal arranged in each connector fitting part. And a joint circuit for connecting the connection terminals of each connector fitting portion electrically and a termination resistor circuit having substantially the same impedance as that of the bus line and connected to the end of the bus line. The joint connector for multiplex communication is provided, wherein the joint circuit is formed of a chain bus bar integrally formed of a metal plate, and the termination resistor circuit is connected in series to the first resistor and the first resistor. a second resistor, the first and the other end one end connected between the second resistor is equipped with a capacitor which is grounded through a ground terminal Ri consists a printed wiring board, the joint with the circuit and the termination resistance circuit is housed and held in the connector housing, the ground terminal of the termination resistor circuit, wherein Rukoto disposed in the connector fitting portion of the connector housing Is achieved by the joint connector for multiplex communication.
[0013]
According to the above configuration, the connection terminals arranged in each connector fitting portion of the connector housing branch-connect to the bus line and electrically connect between the connection terminals of each connector fitting portion. Pre-integrated by the bus bar, the connection work by soldering becomes unnecessary. The terminal resistor circuit requires soldering only for the first and second resistors and capacitors placed on the printed circuit board and a small number of connection terminals and ground terminals connected to the joint circuit. There is also a small printed wiring board for soldering them.
[0014]
Therefore, compared to the conventional case where all the connection terminals equipped in the joint connector for multiplex communication are soldered to a large printed wiring board one by one, the soldering locations can be greatly reduced. Productivity can be greatly improved by reducing the effort required for quality control.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a joint connector for multiplex communication according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 are an exploded perspective view and an assembled perspective view of a joint connector for multiplex communication according to an embodiment of the present invention.
[0016]
Similar to the multiplex communication joint connector 1 shown in FIG. 3 and FIG. 4, the multiplex communication joint connector 31 of the present embodiment is connected to a multiplex communication bus line to control a plurality of electrical components by CAN communication. It is a joint connector used for network connection with a plurality of electrical components.
[0017]
As shown in FIG. 1, the multiplex communication joint connector 31 of the present embodiment includes a connector housing 33 having a plurality of connector fitting portions 33a opened on the upper surface, and a plurality of connector fitting portions 33a arranged on each connector fitting portion 33a. A connecting circuit 35 for branching and connecting the connecting terminal 35a to the bus line and electrically connecting the connecting terminals 35a of each connector fitting portion 33a, and the bus line having substantially the same impedance as the bus line. And a termination resistor circuit 20 connected to the termination of the terminal.
[0018]
Among the plurality of connector fitting portions 33a provided in the connector housing 33, some are used as bus connection ports for connecting bus lines for multiplex communication, and the remaining are terminal communication devices. Used as a terminal connection port to connect.
As shown in FIG. 2, the electrical connection between the connection terminal 35a and the bus line or the terminal communication device in each connector fitting portion 33a is performed via the male connector 11 fitted in each connector fitting portion 33a.
[0019]
The connector housing 33 includes a housing main body 41 having a connector fitting portion 33a on the upper surface and an open lower portion, and a lower cover 43 covering the lower open portion of the housing main body 41. The joint circuit 35 and the termination resistor circuit 20 are accommodated and held in an accommodating space defined between the lower cover 43 and the lower cover 43. The housing body 41 and the lower cover 43 are both integrally molded products made of an insulating resin material.
[0020]
The termination resistor circuit 20 is connected to the joint circuit 35 in order to prevent inconvenience due to signal reflection at the end of the bus line when the multiplex communication joint connector 31 is used at the end of the bus line. Circuit.
As shown in FIG. 1, the termination resistor circuit 20 includes a first resistor 21, a second resistor 22 connected in series to the first resistor 21, and the first and second resistors 21. , 22 and a printed wiring board 36 on which a capacitor 23 having one end connected and grounded via a ground terminal 25 is mounted.
[0021]
A through hole 36b is formed through the insulating substrate 36a of the printed wiring board 36, through which the lead of the ground terminal 25 and the lead of the electronic component constituting the termination resistor circuit 20 are inserted. A joint circuit is formed on the back surface of the insulating substrate 36a by a copper foil to electrically connect the leads inserted through the through-holes 36b.
Then, the ground terminal 25 and the electronic component with the lead inserted into the through hole 36b are fixed to the printed wiring board 36 and electrically connected by soldering to the through hole 36b.
[0022]
The joint circuit 35 is composed of a pair of chain bus bars 37 and 37 integrally formed by press molding of a conductive metal plate or the like, and connection terminals 35a arranged in the connector fitting portions 33a of the connector housing 33 are respectively provided. As a branch connection form for branch connection to the bus line and electrical connection between the connection terminals 35a of each connector fitting portion 33a, the connection is integrated in advance in a chain form, so that connection work by soldering is not required.
[0023]
The terminal resistor circuit 20 needs to be soldered at the minimum required to be connected to the first and second resistors 21 and 22 and the capacitor 23 placed on the printed wiring board 36 and the joint circuit 35. There are only the connection terminal 35a and the ground terminal 25, and the printed wiring board 36 for soldering them can be small.
The chain bus bars 37 and 37 are inserted into the housing main body 41 and accommodated in the connector housing 33 together with the first and second resistors 21 and 22 and the capacitor 23 placed on the printed wiring board 36. Retained.
[0024]
That is, the multiplex communication joint connector 31 of the present embodiment does not require the large printed wiring board 7 on which the joint circuit and the termination resistor circuit 9 are mounted as in the conventional multiplex communication joint connector 1 shown in FIG. .
In addition, compared with the conventional multiplex communication joint connector 1 in which all the connection terminals 5 are soldered to the printed wiring board 7 one by one, the number of soldering points can be greatly reduced, and the quality control of the soldering points is required. Productivity can be greatly improved by reducing labor.
[0025]
In the above embodiment, the case where the multiplex communication joint connector 31 is used at the end of the bus line has been described. However, the termination resistor circuit 20 for preventing the occurrence of inconvenience due to signal reflection at the end of the bus line is provided. If not required, the printed wiring board 36 constituting the termination resistor circuit 20 may not be attached.
Therefore, the number of parts can be further reduced, and soldering portions can be eliminated. Also in this case, the chain bus bars 37 and 37 and the connector housing 33 can share the same components.
[0026]
Furthermore, it goes without saying that the joint connector for multiplex communication of the present invention can also be applied to connection between a bus line and a communication terminal device in a network using a multiplex communication protocol other than the above-mentioned CAN communication.
[0027]
【The invention's effect】
As described above, according to the multiplex communication joint connector of the present invention, the connection terminals arranged in the connector fitting portions of the connector housing branch and connect to the bus line and the connection terminals of the connector fitting portions. They are integrated in advance by a chain bus bar as a branch connection form for electrically connecting them, eliminating the need for soldering connection work.
[0028]
In addition, only the first and second resistors and capacitors placed on the printed wiring board and a small number of connection terminals connected to the joint circuit need to be soldered in the termination resistor circuit. The printed wiring board for soldering can be made small.
[0029]
Therefore, compared to the conventional case where all the connection terminals equipped in the joint connector for multiplex communication are soldered to a large printed wiring board one by one, the soldering locations can be greatly reduced. Productivity can be greatly improved by reducing the effort required for quality control.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a multiplex communication joint connector according to an embodiment of the present invention.
2 is an assembled perspective view of the joint connector for multiplex communication shown in FIG. 1. FIG.
FIG. 3 is an exploded perspective view of a conventional joint connector for multiplex communication.
4 is an assembled perspective view of the joint connector for multiplex communication shown in FIG. 3. FIG.
FIG. 5 is a circuit diagram of a termination resistor circuit incorporated in a multiplex communication joint connector.
[Explanation of symbols]
20 terminal resistor circuit 21 first resistor 22 second resistor 23 capacitor 25 ground terminal 31 joint connector 33 for multiplex communication connector housing 33a connector fitting portion 35 joint circuit 35a connection terminal 36 printed wiring board 37 chain bus bar

Claims (1)

A connector housing having a plurality of connector fitting portions to which a bus line for multiplex communication or terminal communication equipment is connected, and a connection terminal arranged at each connector fitting portion is branched and connected to the bus line and each connector. A joint connector for multiplex communication, comprising: a joint circuit that electrically connects between connection terminals of the fitting portion; and a termination resistor circuit that has substantially the same impedance as that of the bus line and is connected to the terminal of the bus line Because
The joint circuit, with consists of the chain busbar integrally formed by a metal plate, prior Symbol termination resistor circuit includes a first resistor, a second resistor connected in series with the first resistor, these first Ri consists of 1 and the printed wiring board the second other end one end of which is connected between the resistor mounting the capacitor is grounded through a ground terminal,
Wherein with the joint circuit and the termination resistance circuit is housed and retained in said connector housing, the ground terminal multiplex communication joint connector, wherein Rukoto disposed in the connector fitting portion of the connector housing of the termination resistance circuit.

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