JPS5885596A - Multiplex communication terminal - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a terminal in an automobile multiplex communication system, and is intended to improve maintainability, manufacturability, and adaptability to specification changes.

Various multiplex communication systems have been proposed in order to reduce the diameter and weight of wire harnesses, which are becoming larger and more complex with the advancement of automobile electronics.

The terminals used in this type of multiplex communication system are (1) a load drive unit such as a lamp or motor, and (2) a 7 unit unit for overcurrent protection.

(3) Capturing information on input switches, sensors, etc.

It is roughly composed of three parts: an electronic control section that controls the load drive section and transmits and receives multiplex communications;

However, the actual structure of a multiplex communication terminal is an integral structure with the elements of each part arranged in a harmonious manner, so even if a part is to be repaired, the whole must be disassembled, making it difficult to maintain. In addition, even in the case of partial specification changes, the overall structure had to be changed, making it difficult to respond to specification changes. This will be further explained with reference to a conventional structural example shown in FIG.

In FIG. 1, reference numeral 1 denotes a heat dissipation plate that surrounds the case, and most of heat generating elements such as semiconductor relays 2 are attached to this heat dissipation plate 1. 3 is a large flow circuit board, on which are installed a fuse terminal 4, an electromagnetic relay terminal 5, and a signal connection connector 6, and the fuse and the magnetic relay are connected through these terminals 4.5. The electronic control section circuit board 7 is also mounted by connecting the signal connection connectors 6 and 8. Further, a terminal 9 for connection to a wire harness and a terminal 10 for signal connection for multiplex communication are attached to both circuit boards 3.7, and wiring to the outside is performed. Reference numeral 11 denotes an electric wire connecting the semiconductor relay 2, etc. and the pattern 3a of the large current circuit board 3, and these heating elements are connected to the electronic control circuit board 7 through the large current circuit board 3. Ru.

Therefore, if there is a failure in the semiconductor relay 2, in order to replace it, the heat sink 1, large flow section circuit board 3, and electronic control section circuit board 7 must be separated from each other and then replaced, and then after reassembly. Must be checked. In addition, when a specification change such as the addition of a function occurs, for example, even if the number of semiconductor relays increases by one, it is necessary to change the layout of the large flow section circuit board 3 and the electronic control section circuit board 7 and the layout of the parts. I have no choice but to change everything. Note that 4 in Figure 1
a is a metal fitting for attaching a fuse.

It is an object of the present invention to overcome the drawbacks of the prior art and to provide a multiplex communication terminal that is easy to maintain, manufacturable, and adaptable to changes in specifications. In order to achieve this object, in the present invention, each part of the terminal is made into units, and the terminals are constructed by connecting the units with connectors.

The present invention will be explained below based on the drawings.

FIG. 2 shows an embodiment of the present invention, in which 12 is a passive junction block (hereinafter abbreviated as PJB), 13 is a load drive unit, 14 is an electronic control unit, and 15 is an overcurrent protection unit. It is. All load driving elements such as electromagnetic relays and semiconductor relays are mounted on the load outside 13, and terminal connectors connected to each load driving element are provided on the bottom surface of the case of the unit. The electronic control unit 14 includes input switches and sensor signal acquisition circuits,
It is equipped with a control circuit for the load drive element and a transmission/reception circuit for multiplex communication, and the input terminal connector of the signal acquisition section, the output terminal connector of the control circuit, and the input/output terminal connector of the transmission/reception circuit are provided on the bottom of the case. There is. The overcurrent protection unit 15 is equipped with all overcurrent protection elements such as fuses and circuit breakers, and terminal connectors connected to each element are provided on the bottom surface of the case. The terminal connectors of each of these units 13 to 15 can be combined with the specified terminal connector of PJB12 soil, and each unit 13 to 15 (
CF, P J B 12 is connected to the connector.

Each unit 13 to 15 must be connected to each other, or between an element and a circuit, but this connection is
This is done by wiring between the terminal connectors in JB12. That is, the electronic control unit 1 is installed on the PJB 12.
Signal terminal connector 16 for +, large current and control signal terminal connector 1 for load drive unit 13
7. Terminal connector 18 for overcurrent protection unit 15
are provided, and wires are wired between these terminal connectors to form a predetermined circuit. Note that 19 is a terminal connector for a wire harness for a load element, input switch or sensor, and for connection to a multiplex transmission line, and is connected to other terminal connectors 16 to 18 in PJB 12.
and the necessary wiring has been done.

With the above unitized structure, if a failure occurs in the multiplex communication terminal, it is only necessary to replace the failure part as a whole, so maintainability is extremely good.

Also, in terms of manufacturing, it is easy to assemble each unit separately and then connect them with connectors at the end. Furthermore, if there is a specification change, P J B () <
? By changing the wiring at the terminal (junction block), changes in other units can be made, which shortens the development and design period.

FIG. 3 shows another embodiment, in which (a) shows the overall + fl configuration,
Wholesale shows the basic structure of PJB, and (C) shows the details of PJB. In this embodiment, the unit 13 on the load side 11
A male terminal connector is taken out from the overcurrent protection unit 15, and connected to the multiplex control unit IA and the wire harness 20a.
The connector 20 is a female terminal connector.

PJB 1.2 places particular emphasis on adaptability to specification changes and improvement of manufacturability, and is a universal design in which two sets of upper and lower passbars are supported in parallel at regular intervals and are arranged orthogonal to each other. It is a thing. In PJB using this group of passpers, the desired wiring is achieved by cutting the location A necessary for connection as shown in Fig. 3(c), and by connecting the upper and lower passpers 21 and 22 with connection bins 23, etc. . The connection pin 23 in this example is a cylindrical conductor with slits formed at right angles to each other at the top and bottom, and the slits are driven into the passper. In FIG. 3(C), reference numeral 24 denotes a plate-shaped male terminal for the female terminal of the wire harness connector 20, and the male terminal 24 is attached by being driven into the busbar 14 cut into the lower part. Reference numeral 25 is a female terminal for load drive and overcurrent protection unit 13.15, and this female terminal 25 is also driven into the slot through the slit at the bottom. 26 is a male terminal for the electronic control unit 14;
6. The tip of the spar is processed into a terminal shape.

In the case of such male terminals 26, the pitch of the conductors may be set to be the same as the pitch of the female terminals of the electronic control unit 14, which saves the trouble of driving the male terminals into the conductors. Of course, similar to the other terminals 24 and 25, terminals with slits may be inserted into the passper.

FIG. 4 shows another example of uPJB (d' junction block) 12. The PJB 12 in this example is realized using a printed circuit board 27, and a signal connector 28 for the electronic control unit, a terminal 29 for the load drive unit, and a terminal 30 for the overcurrent protection unit can be attached to this printed circuit board 27. be. The copper pattern 31 can handle a large current by selecting the width and thickness. Although the copper pattern 31 is formed by etching in this example, it can also be realized by attaching a punched copper plate to an insulating substrate.

In addition, as for PJB12, Fig. 3 (b) and (c)
It is sufficient to use the type shown in Figure 3 or the type shown in Figure 4 independently, but it is also possible to use a composite type that combines both, that is, a pass bar set and a printed circuit board type, for example, for small current wiring such as signal lines. It is also possible to use a printed circuit board and use different passpers for high current wiring.1

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing an example of a semi-constructed multiplex oil converting terminal, Fig. 2 is an exploded perspective view showing one embodiment of the present invention, and Fig. 3 is an exploded perspective view showing another embodiment of the present invention. a) is a perspective view of the whole;
(b) is a basic configuration diagram of a passive junction block, (c) is a perspective view showing an example of the use of (bl), and FIG. 4 is a perspective view of a passive junction block according to another embodiment. In the drawing, ] 2 is a passive soyanction block (PJB).
), 13 is a load handling unit (transfer unit, 14 is a tortoise) control unit, 15 is an overcurrent maintenance unit, 16 to 20 are terminal connectors, 2] and 22 are passpers, 23 is a contact screw pin, 24 to 26 are 27 is a printed circuit board, 28 is a connector, 29 and 30 are terminals, 3J is a copper pattern, A 117j is a cutting point. Patent Applicant Sumitomo Electric Industries Co., Ltd. Agent Patent Attorney Mitsuishi Shibu (and 1 other person) 1 Figure 1 Figure 2 Figure 3 and σ

Claims (1)

[Scope of Claims] (1) In an automobile multiplex communication terminal, there is a load drive unit in which load drive elements such as electromagnetic relays and semiconductor relays are assembled among the terminal components, and overcurrent of fuses, circuit breakers, etc. An overcurrent protection unit that includes protection elements, an element control unit that includes signal acquisition circuits such as input switches and sensors, control circuits for load Ju elements, and multiplex communication transmission/reception circuits, and each of these units. 1. A multiplex communication terminal comprising: a junction block having a connector for coupling with a connector of a unit and having connection wiring between each unit. (21 above/"A group of two groups of spars in which the connection wiring of the Tsushibu shank john block is arranged vertically orthogonally,
The multiplex communication terminal according to item 1 of the claim, characterized in that the required wiring circuit is formed by cutting connection bins and bus bars that connect upper and lower bus bars. (3) The multiplex communication terminal according to claim 1, wherein the connection wiring of the TP junction block is constituted by a printed circuit board. (The connection wiring for the passive shank john block on 41 is done on a printed circuit board for small currents, while the
2. The multiplex communication terminal according to claim 1, wherein the diversion is performed by a bus bar.