JPH01212641A - On-vehicle electric connection box - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of plural kinds of the on-vehicle electric connection boxes by dividing the electric connection box into a main electric power source block equipped with a main electric power source circuit and a plurality of small-sized electric power source blocks equipped with each branching circuit corresponding to each system and allowing these blocks to be mounted and demounted freely. CONSTITUTION:The title on-vehicle electric connection box is formed by accommodating a main electric power source block 11 and a small-sized electric power source blocks 18X-18Z having a plurality of branched bus bars corresponding to the systems into an under case 24 closed by a waterproof cover 25. The main electric power source block 11 is equipped with the bus bars (1A and 1B) which constitute a main electric power source circuit, and a necessary fusible link FL and a fuse F are installed. A case 12 having a plurality of fitting parts 13 which are divided formed for the small- sized electric power source blocks 18X-18Z is provided, and a connector part 15 for connecting blocks is formed, together with a window 14, onto the bottom wall of the fitting part 13, and a connecting terminal 16 and a female-male relaying terminal 17 which are branched from the bus bar 1 are accommodated into the connector part 15.

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] The present invention relates to an on-vehicle electrical junction box, and the present invention simplifies the circuit configuration by dividing the internal complicated circuit into several systems and assembling them. This is what I did.

[Conventional technology]

Generally, as shown in FIG. 7, an electrical connection box includes a wiring board 3 consisting of a plurality of bus bars 1 and an insulating substrate 2, and a main case 4.
, an under case 5 and a necessary waterproof cover 6. Case 4 or 5 has multiple fuse cavities 7
, a relay cavity 8, a connector insertion part 9, and other coupling parts, and in these coupling parts, a group of branch tabs 10 formed on the bus bar 1 are arranged and protruded as electrode terminals.

The wiring board 3 is usually stacked in two or more layers and housed in both cases 4.5. FIG. 8 shows an example of an equivalent circuit using bus bars of a conventional electrical connection box formed as a power distribution box. In the figure, FL indicates a fusible link, F indicates a fuse, and R indicates a relay, and the symbol T at the left and right ends indicates the branch tab lO
The output terminal (electrode terminal) is shown.

The circuits in the electrical junction boxes J and B above include three busbars IA.
, IB and IC, and each busbar has multiple branch busbars al + a2 * bl + b2.
...b13+c, has IC. These branch busbars are for example ignition system (al + 2 + 1)l) such as ignition SW1 alternator,
In addition to warning systems such as horns and hazards (B2~.), electronic fuel injection systems (B8~Ion CI + 2), lighting systems such as headlights (B11~13), telephone (BS)
, a separate load such as a radio (BL) or a switch.

[Problem to be solved by the invention]

The circuit configuration in the conventional electrical junction boxes J and B is configured as a composite circuit in which circuits for each system are determined from the wiring system of the entire vehicle and these circuits are integrated into one by the wiring board 3.

Therefore, for example, when the number of power lines, signal lines, operating lines (SW), fuses, etc. increases in one system due to the installation of an electronic fuel injection device, the internal circuit becomes complicated, making it difficult to route the busbar. Become. Also, depending on the class of the vehicle or changes in specifications, empty terminals or unused parts may appear. On the other hand, when considering sharing with other vehicles, there are various restrictions on the circuit configuration, the structure of the fuse cavity 7, the connector insertion part 9, etc., and it is difficult to use, so in the end, many types of electrical connection boxes are required. Must be prepared.

The present invention was made to solve the above problems,
An object of the present invention is to provide an on-vehicle electrical junction box that can simplify the circuit configuration within the electrical junction box, easily cope with the increase in the number of systems, and can be used in common with many types of vehicles.

Structure of the Invention [Means for Solving the Problems] In order to achieve the above object, the in-vehicle electrical junction box of the present invention includes one or more main power circuits, and an ignition system branched from the main power circuit. Many branch circuits connected to systems such as lighting systems and electronic fuel injection systems are built into the case, and the terminals of each branch circuit are formed in the case, connecting parts such as fuses, relays, and wire harness connectors. The electrical junction box has a main power supply block with the main power circuit built in the case and a plurality of branch circuits corresponding to each of the systems built in the case. The main power source block is divided into two small power source blocks, and these small power source blocks are detachably connected to the main power source block.

[For production]

According to the invention, the busbars IA, IB of FIG.

Among the composite circuits composed of 1C, for example, a branch busbar b2 that constitutes each system such as the alarm system, electronic fuel injection system, and lighting system surrounded by dotted line blocks x, y, and z.
~b3 group, b8~b1°+CIeC2 group and bll-
The bl3 group has bus bars IA and 1B, respectively, as shown in Figure 4.
They are divided and formed independently from each other.

That is, by dividing the internal circuit into a plurality of blocks, the circuit configuration is simplified, and the bus bar can be easily routed and the degree of freedom is increased.

Depending on whether or not a small power supply block is used, it is possible to eliminate some of the vacant terminals, fuses, and relays that occur due to differences in vehicle class.

When sharing with other vehicles, a circuit suitable for the vehicle can be obtained by simply changing the number of small power blocks connected to the main power block, the external structure of the small blocks, and the internal circuit configuration.

In addition, the electrical connection between the main power supply block and the small power supply block can be achieved by, for example, connecting the divided portions of the bus bar IB indicated by symbols x and x' in FIG. Alternatively, this can be easily accomplished by known means such as soldering a lead wire with a female terminal attached.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to drawings showing embodiments.

In Fig. 1, 11 is the main power block of the electrical junction box;
18x to 182 are small power supply blocks, 24 is an under case, and 25 is a waterproof cover.

The main power supply block 11 has busbars 1 (LA, IB) constituting the main power supply circuit shown in FIG. 4 built-in in a case 12, and is equipped with necessary fusible links FL and fuses F. In addition, the case 12 has a small power supply block 18X.
A plurality of fitting parts 13 are formed for each of the fitting parts 182 and 182, and the bottom wall of the fitting part 13 is provided with a window 14 and a connector part 15 for connecting blocks, and the connector part 15 has a bus bar as shown in FIG. Connection terminal 16 branched from IB and female
A female relay terminal 17 is housed therein.

The small power supply block 18X is constructed by accommodating a group of branch busbars b2 to b5, which constitute the block X in FIG. 4, in a main case 19 and an under case 20, as shown in FIG. The main case 19 has the necessary fuse cavity 21
and a relay cavity 22, and the connection terminals 16' connected to the relay terminals 17 in FIG. 3 are arranged so as to extend from the branch busbars b2 to b and protrude downward. Further, the under case 20 is provided with a connector insertion portion 23 for connecting a wire harness.

The under case 24 has a plurality of windows 14' opening at the bottom that align with the windows 14, and the connector insertion portion 23 of the small power supply block 18X (18Y, 182) protrudes outside from the windows 14°14'. That's how it is. A lock claw 26 and a lock frame 27 constituting locking means are provided on the outer peripheral walls of the under case 24 and the waterproof cover 25.

The small power supply blocks 18Y and 18Z are also configured in the same manner as the 18X, so a description thereof will be omitted, but the circuits built into each block may be those compatible with each of the systems described above.
In addition to the wiring board consisting of the busbars 1 (IA to IC), a PCB or FPC can also be used. Further, the connection terminals 16 and 16' of the main power supply block 11 and the small power supply block 18x are respectively divided portions X of the busbar IB in FIG.

Corresponds to X'.

In the above configuration, the electrical junction box is assembled by storing the main power supply block 11 in the under case 24, and
Small power supply blocks 18X are sequentially attached to the plurality of fitting parts 13 of 1.
When 18Y and 182 are fitted, each block 18X-
182 connection terminal 16' is connected to the connection terminal 16 of the main power supply block 11 via the relay terminal 17 as shown in FIG. Since it protrudes, use a waterproof cover 25 if necessary.
It can be easily finished by covering it and locking it (26, 27).

Main power block 11 and small power block 18X~182
The blocks x, y, z corresponding to each system in FIG. 4 are electrically connected to the main power supply circuit (busbars IA, IB), and a composite circuit as shown in FIG. 8 is formed.

The circuit in the small power supply block has a small and simple configuration consisting of a plurality of branch busbars compatible with the above-mentioned system, and the circuit design can be easily changed. Furthermore, if necessary, the structure of the main case 12 may be changed so that the number of small power supply blocks connected to the main power supply block can be increased or decreased.

Therefore, by changing the combination of the main power supply block and the small power supply block, it is possible to create many types of electrical connection boxes with different circuit configurations corresponding to vehicle types, classes, etc.

Figures 5 and 6 show other embodiments of the invention;
Female terminal 2 instead of connection terminal 16 of bus bar IB in the figure
8 is crimped and fixed, and an electric wire 29 is provided to connect the female terminal 28 to each connection terminal 16' of the small power supply block.

In this case, since the electric wire 29 can be fixed to the busbar IB at one location by soldering or the like and taken out, the connection terminal 16 of the busbar IB can be connected to the main power supply block 11 at each fitting part of the main case 12. 13 and the connector section 15 is also unnecessary, the configurations of the main power circuit and the main case 12 are simplified.

In addition, in Fig. 5.6, W is the wire harness W
/ is the branch line part, 30 is the small power supply block 18X~1
82 shows a harness-side connector that is fitted into the connector insertion portion 23 of No. 82.

As described in detail, the in-vehicle electrical junction box of the present invention is divided into a main power block having a main power circuit and a plurality of small power blocks having branch circuits corresponding to each system. The design of the busbars, etc. that make up each circuit and the design of the circuits can be changed easily, and the type and number of small power blocks connected to the main power block can be easily changed. By changing it, it is possible to make many types of electrical connection boxes that correspond to different vehicle types, classes, etc., and it is possible to share them.

Furthermore, by using a small power supply block, empty terminals and unused parts in the conventional art can be eliminated, and an electrical connection box with no waste can be obtained.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing an embodiment of the on-vehicle electrical junction box of the present invention, Fig. 2 is an exploded perspective view showing an enlarged view of the small power supply block shown in Fig. 1, and Fig. 3 is the same as the one shown in Fig. 1. 4 is a block circuit diagram of the on-vehicle electrical junction box of FIG. 1, FIG. 5 is an exploded perspective view of the main parts showing another embodiment of the present invention, and FIG. FIG. 5 is a sectional view of essential parts in a combined state, FIG. 7 is an exploded perspective view of a conventional on-vehicle electrical connection box, and FIG. 8 is a block circuit diagram of the same. 1.1A, IB, IC...Busbar (main power circuit),
a 1 + C2r b 1 + b2”-b14+
Cs l C2...branch busbar (branch circuit), 11
...Main power block, 12...Case, 13...
Fitting part, 14.14'... window, 15... connector part, 16.16' is connecting terminal, 17... relay terminal, 18
X, 18Y, 182...small power supply block, 19...
・Main case, 20... Under case, 23...
・Connector insertion part, 25... Waterproof cover, x, y, z
···block. Patent applicant: Yazaki Sogyo Co., Ltd. No. 3 - Figure 4 Figure 5 Figure 8 Procedural amendment (voluntary) May 23, 1988 Director General No. J'-Jll Ta■o 1,
E-gyu no joshi R 1985 Shin-No. 035362 2, Name of the invention: Vehicle-mounted electrical connection box 1 Relationship with the case of the person making the amendment Patent applicant address: 1-4-28 Mita, Minato-ku, Tokyo Name ( 689
) Yasaki Sogyo Co., Ltd. 4, Agent 6, Contents of amendment to increase the number of claims due to amendment (Patent Application No. 63-035362) 1, In the description: (1) Page 3, line 1 and from the bottom "rJ, BJ" on the 8th line is "r(J, B)," and "C" on the 4th row of page 3 is "rC." (3) Change 'C+etJ' in line 8 of page 3 to '
C+sCgJ (4) On page 6, line 6, correct the word "suitable" to "suitable." 2. Correct Figures 4, 5, and 8 as shown in the attached sheet. Patent applicant: Yazaki Sogyo Co., Ltd. 1Δ
Mouth Figure 4 Figure 5

Claims (1)

[Claims] One or more main power circuits and a number of branch circuits that are branched from the main power circuit and connected to systems such as the ignition system, lighting system, and electronic fuel injection system are built into the case, and the terminals of each branch circuit are built into the case. is led out as an electrode terminal to a connecting part of a fuse, relay, wire harness connection connector, etc. formed in the case, and the electrical connection box is a main power block in which the main power circuit is built into the case. and a plurality of small power supply blocks with a plurality of branch circuits corresponding to each of the above-mentioned systems built into the case, and these small power supply blocks are detachably connected to the main power supply block. An in-vehicle electrical connection box characterized by: