JPH0331631Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a wiring device with built-in functions for automobiles, and more specifically, to a sub-electronic unit pack that is detachably connected to a main junction block. This is intended to increase the current capacity of the through circuit formed on the printed circuit board and to reduce the size of the pack.

[Conventional technology]

Traditionally, electrical wiring in automobiles has been made up of junction blocks (hereinafter referred to as "junction blocks"), which have a large number of relays, fuses, and multiple wiring boards with busbar circuits arranged on insulating boards, as well as their terminal groups (connectors).
It's called "JB". ) to simplify the production of wire harnesses and the wiring configuration. As an example, multiple JBs are placed at appropriate locations inside the car,
There is a method of controlling various loads (electrical components) using trunk wiring and branch wiring with few branch wires (Special Publications Publication No. 57-
No. 34132).

However, the number of electrical components installed in vehicles is increasing year by year due to the pursuit of safety and the desire to improve interior comfort.
Not only has the wiring harness become larger and more complex, but the structure of the JB itself has also become more complex due to the addition of relays, fuses, etc. Therefore, in order to reduce the number of wires in the wire harness and simplify the internal structure of the JB, a functional circuit is built into the JB, and the parts that can be processed only by the signals coming into the JB are processed by the function.
A method for outputting processing results has been developed.
As a typical example, in order to reduce the number of busbars in the JB, a function-embedded wiring device has been proposed that is provided with a connector for transmitting input/output signals directly to the functional circuit section without going through the JB.

However, even when using a JB with built-in functional circuits, if electrical components are added or specifications are partially changed, it becomes necessary to change the internal and external structure of the JB. Therefore, recently, the main JB
A method is adopted in which a sub JB or electronic unit pack (hereinafter sometimes referred to as "pack") is removably connected to the JB (there may be more than one), and the solution can be taken quickly by replacing the pack. I started to do that.

A pack attached to such a JB naturally has a through circuit due to its connection function, that is, a circuit that is used within the pack and goes out to the outside.

To explain this more specifically with reference to the drawings, in Figures 3A and 3B, 1 is the JB, 2 is the pack, 3 is the connector connected to the terminal of the wire harness W, and the outer circumference of the case 4 of the pack 2 is A JB coupling connector 5 and an external coupling connector 6 are provided.

The circuit introduced from J.B1 to pack 2 through connector 5 includes electronic unit 7 as shown in Figure 3B.
There is a signal circuit 8 that enters only the electronic unit 7, its output circuit 9, and through circuits 10a and 10b.
There is. The through circuits 10a, 10b and the output circuit 9 are electrically connected to a connection terminal (not shown) in the external coupling connector 6. The electronic unit 7 is
A device circuit is composed of necessary electronic elements and parts such as resistors, capacitors, transistors, ICs, LSIs, and relays, and a printed circuit board (described later).

Figures 4A and 4B show the internal structure of pack 2. In the case 4, the JB coupling connector 5 and the external coupling connector 6 are installed on separate printed circuit boards 11a, respectively.
11b, the connectors 5 and 6 are arranged in opposite directions, and the substrates 11a and 11b are electrically connected by a jumping wire 12 or the like. In addition, in B, the connector 5 is connected to the printed circuit board 11c.
On the other hand, the connector 6 is fixed to the case 4 or the board 11c, and the connection terminal 13 of the connector 6 is formed in a U-shape so that there is a step h with respect to the board 11c.
Here is an example of absorbing.

Note that a busbar wiring board having a desired circuit configuration (not shown) and a functional circuit are incorporated inside the case 14 of J.B1 shown in FIG. 3A. Also,
15 is a pack coupling connector, 16 is an external coupling connector, 17 is a fuse, 18 is a fuse holder,
19 is a relay.

[Problem that the invention attempts to solve]

In this way, in the conventional function-embedded wiring device composed of J.B1 and pack 2, the through circuit 10
Since the circuit boards a and 10b are always formed on the printed circuit boards 11a to 11c, there is a restriction that the allowable current cannot be increased. Furthermore, since the JB coupling connector 5 and the external coupling connector 6 are directly fixed on the printed circuit board, a certain amount of mounting space is required, which reduces the mounting space for the electronic unit and makes the entire pack 2 relatively large. There were other problems.

The purpose of this invention is to solve the above problems and to
To provide a function-embedded wiring device comprising an electronic unit pack detachably connected to a circuit board, which is suitable for electrical wiring of an automobile, and can simultaneously increase the permissible current of a through circuit in the pack and reduce the size of the pack itself. It is in.

[Means for solving problems]

The automotive functional wiring device of the present invention houses a JB used for electrical wiring in a car, a printed circuit board with a functional circuit for connecting signals between wire harnesses inside the case, and a JB on the outer periphery of the case. .
In a wiring device in which an electronic unit pack provided with a B coupling connector and an external coupling connector are detachably connected by the JB coupling connector, the external coupling connector is provided on the opposite side of the case to the side on which the JB coupling connector is installed, A female terminal is fixed to the printed circuit board, and the tip of a tab-shaped connecting terminal that enters the JB coupling connector of the electronic unit pack from the JB is brought into penetrating contact with the female terminal so as to protrude into the external coupling connector. The connecting terminal is formed as a through circuit, and the female terminal is connected to the functional circuit of the printed circuit board as necessary.

The above configuration will be specifically described below with reference to the drawings.

In Figures 1 and 2, A is JB, 20
21 is an electronic unit pack, and the case 22 of the pack 21 contains electronic elements 23a, 23b such as resistors and capacitors.
A printed circuit board 24 constituting a functional circuit is also accommodated therein.

Reference numeral 25 denotes a female terminal soldered to the printed circuit board 24, and as shown in FIG. A receiving portion 25c for the tab-shaped terminal is formed, and the substrate 25
It has a configuration in which an elastic contact piece 25d is formed extending into the receiving portion 25c from one end of the a, and a connecting pin 25e is provided protruding from the other end.

The female terminal 25 has its connecting pin 25e fixed to the printed circuit board 24, and is electrically connected to a part of the functional circuit of the circuit board 24.

Reference numeral 26 denotes a tab-shaped connection terminal that connects the J.BA and the pack 21, and its tip connects to the terminal through hole 27 provided on each fitting surface 20a, 22a of the receiving box 20 and case 22 and the printed circuit board 24. The receiving portion 25 of the female terminal 25 is inserted through the notch or the terminal through hole 28.
c, is connected here by an elastic contact piece 25d, and projects into the housing 29 through a terminal through hole 30 provided in the bottom wall of the housing 29, which is formed integrally with the case 22. .

The housing 29 is formed to face the opposite side of the fitting surface 22a of the case 22 with the receiving box 20, and forms an external coupling connector 31 together with the connection terminals 26. This connector 31 corresponds to the conventional external coupling connector 6, and also has mating surfaces 20a and 22a.
Similarly, the conventional pack coupling connector 15 and J.
Corresponds to B coupling connector 5.

Note that when there is no need to insert a signal circuit into the pack 21 from the connection terminal 26, the female terminal 25
and functional circuits. Further, among the connection terminals 26, those used only for connection with the pack 21 are formed low as usual. The terminals that protrude into the housing 29 may include terminals taken out from the printed circuit board 24 as output circuits in addition to connection terminals as through circuits.

[Function] According to the present invention, the through circuit from J.BA to the external coupling connector 31 of the pack 21 is composed of only the connection terminal 26 and does not go through the printed circuit board 24 in the pack 21.

Therefore, (1) the allowable current of the through circuit can be freely set to any size, and (2) the through circuit (usually formed with a thick pattern ), (3) frees up space on the printed circuit board, making it possible to add electronic units and downsize the board, and (4) generally reduce the size of the printed circuit board in the pack, including through-circuits. The degree of freedom in functional circuits increases,
This has the effect of making design easier.

Furthermore, the interposition of the female terminal allows the mounting positions of the JB coupling connector and the external coupling connector to be moved relative to each other, making it less susceptible to structural restrictions and making it easier to route through circuits.

[Effect of idea]

As explained above, according to the present invention, a through circuit is not provided directly on the printed circuit board of the electronic unit pack connected to the JB, but the through circuit is formed by the connection terminal of the JB and the pack, so that the allowable current is increased. Thus, it is possible to provide a function-embedded wiring device whose package itself can be easily miniaturized.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing an example of the wiring device of the present invention, and FIG. 2 is a perspective view of the female terminal 25 of the same. Figures 3A and 3B are an exploded perspective view (A) showing a conventional wiring device, and an internal circuit diagram (B) of the electronic unit pack 2.
4A and 4B are explanatory diagrams of the internal structure of the pack 2, respectively. A...Janking block (JB), 20
...Receiving box, 21...Electronic unit pack, 24...
... Printed circuit board, 25 ... Female terminal, 26 ... Connection terminal, 27, 30 ... Terminal through hole, 28 ... Notch or terminal through hole, 31 ... External coupling connector.

Claims (1)

[Scope of claim for utility model registration] A junction block (hereinafter referred to as "JB") used for electrical wiring in automobiles, and a printed circuit board with a functional circuit formed to connect signals between wire harnesses housed in the case. and an electronic unit pack having a JB coupling connector and an external coupling connector provided on the outer periphery of the case, in which the external coupling connector is connected to the JB coupling connector installation side of the case and the electronic unit pack is detachably connected by the JB coupling connector. A female terminal is fixed to the printed circuit board on the opposite side, and the tip of a tab-shaped connecting terminal that enters the JB coupling connector of the electronic unit pack from the JB is brought into penetrating contact with the female terminal and inserted into the external coupling connector. A functional built-in wiring device for an automobile, characterized in that the connecting terminal is formed as a through circuit by protruding, and the female terminal is connected to a functional circuit of the printed circuit board as required.