JPH0970121A - Electric junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric junction box which is small in size and adaptable to circuit change. SOLUTION: An electric junction box is composed of a protective system electric junction box 2 having circuit protective devices such as fuses and relays and a branching system electric junction box 3 with which electric circuits are branched and/or absorbed. Electrical connection units with which the respective internal circuits of the protective system electric junction box 2 and the branching system electric junction box 3 are connected to each other and electrical connection units with which the respective internal circuits are connected to other external circuits are provided on the electric junction boxes 2 and 3, respectively. Further, linking parts with which the cases of the electric junction boxes 2 and 3 are detachably coupled with each other are provided and the cases are coupled with each other while the internal circuits are connected to each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric connection box mounted on an automobile, and has an electric connection box suitable for a circuit structure and is downsized.

[0002]

2. Description of the Related Art Among the electrical connection boxes of this type, an electrical connection box composed of a junction box has a complicated and large-sized internal circuit for branching and connecting electric circuits as the number of electrical components mounted on an automobile increases. The number of circuit protection components such as a large number of fuses and relays is increasing along with this. Furthermore, a control circuit system including an electronic unit is also being installed in the electric junction box, and the electric junction box is becoming larger and larger.

[0003]

However, when the electric connection box becomes large in size as described above, not only the manufacturability is deteriorated, but also the installation space is lost, and the workability of assembling to an automobile is deteriorated.

Further, it is necessary to change the configuration of the electric junction box every time the circuit configuration is changed due to the difference in option specifications and destination specifications. In that case, many fuses, relays and other circuit protection elements are mounted. Therefore, the box shape of the electric junction box is complicated, the cost for manufacturing the mold is high, and the manufacturing cost is increased. Furthermore, in the electric connection box, circuit protection elements such as fuses and relays are arranged in a distributed manner, which causes the electric connection box to become larger.

The present invention has been made in view of the above problems, and it is an object of the present invention to make it possible to easily cope with circuit changes and to reduce the size of an electrical junction box.

[0006]

In order to achieve the above-mentioned object, the present invention provides an electric connection box mounted on an automobile according to claim 1, which includes a fuse, a relay, a fusible link,
It consists of a protection system electric connection box equipped with a circuit protection element consisting of a noise filter, a capacitor or a resistor, and a branch system electric connection box equipped with a circuit that performs branch absorption of a conductive path. The system electric connection box is provided with an electric connection part for connecting these internal circuits to each other and an electric connection part for connecting with other external circuits, and the case of these electric connection boxes is detachably coupled. Provided is an electrical junction box having a connecting portion and having a configuration in which a case is coupled with an internal circuit being connected.

With the above-mentioned structure, only the circuit protection elements such as fuses and relays are integrated in the protection system electrical junction box, and the fuses are fuse blocks and the relays are block type integrated as relay blocks. The circuit can be easily changed by increasing or decreasing. On the other hand, the branch type electrical junction box does not need to be provided with a portion for mounting circuit protection elements such as fuses and relays, so the shape is simple and easy to manufacture when the electrical junction box is changed according to the circuit change. it can. In addition, in the case of the conventional integrated type, there are extra circuit protection elements and branch circuits, but as a separate body, an electrical junction box equipped with only the necessary circuit protection elements and a branch type electrical circuit equipped with only the necessary branch circuits. When the junction boxes are combined, the electrical junction box itself can be downsized and does not take up space.

In addition to the protection system electric connection box and the branch system electric connection box, a control system electric connection box composed of an electronic unit is separately provided, and the internal circuits of these are electrically connected and detachably connected. . (Claim 2)

As described above, if the control system electric connection box is a separate body, it is possible to easily cope with circuit changes, and if there is no space for installing a large electric connection box, the control system electric connection box is installed separately. You can deal with things.

The branch-type electrical junction box may be provided in a plurality of types according to the difference in internal circuit, and selected for use.
The protection system electrical junction box is also provided with a plurality of reference types, and the reference types are connected according to the number of circuits. (Claim 3)

As described above, if the branch type electric connection box is provided in advance for each different model in the same vehicle type, it is possible to easily cope with the change by simply changing the branch type electric connection box. In addition, since the branch type electric connection box having only the necessary circuits is attached, the size can be made smaller than the conventional integrated type electric connection box which is mixed even if it is connected to the protection type electric connection box. Also, a large number of standard types of protection system electrical junction boxes are prepared and connected according to the increase or decrease of the circuit,
It can easily respond to circuit changes.

The electrical connecting portions for connecting the internal circuits respectively provided in the protective system and the branch type electrical junction boxes are composed of female terminals and male terminals, and one terminal is projected from the outer surface of the case of one electrical junction box. It is preferable that the other terminal is provided inside the opening of the electric junction box. (Claim 4)

With the above-mentioned structure, when the protection system electrical connection box and the branch system electrical connection box are connected, the male and female terminals are connected to each other for electrical connection, and it is not necessary to separately provide an electrical connector.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an embodiment of the present invention will be described below with reference to the drawings. 1A, 1B and 1C show the first embodiment. In the first embodiment, a circuit protection element such as a fuse and a relay shown in FIG.
A conventional integrated electric junction box 1 in which a conductive material such as a absorbing bus bar is mixed, and a branching / absorption with a protection type electric junction box 2 shown in FIG. 2 with branch system electrical junction box 3 that collects only circuit components
It is divided into two separate electrical junction boxes. FIG. 1 (C) shows a state in which the protection system electrical junction box 2 and the branching system electrical junction box 3 are connected to each other, and in the coupled state, it is one size smaller than the integrated electrical junction box 1 in FIG. 1 (A). There is.

The branch type electric connection box 2 is in the form of a rectangular parallelepiped block and houses the fuses 4 and the relays 5 collectively. (Note that the numbers of the fuses 4 and the relays 5 are simplified in FIGS. (B) and (C).)

A connector 2a for connecting an external circuit for connecting to the power source side is provided on one side surface of the branch type electrical junction box 2 and is connected to the downstream side circuit of the fuse 4 and the relay 5 on the other side surface. A large number of connectors 2b accommodating male terminals (not shown) are formed, and these connectors 2b are formed on one side surface of the branch-type electrical junction box 3 to form a connector accommodating portion 3
It is designed to fit into a. The protection system electric connection box 2
A bus bar is used as a conductive material of an internal circuit 6 that connects the fuse 4 and the relay 5 in the inside to an upstream power source and connects to the circuit in the downstream branching electric junction box 3, and the male terminal including a tab on the bus bar. Is provided, and the connector portions 2a and 2b are provided.
Is located. An external circuit 14 such as a power circuit is connected to the external circuit connecting connector 2a.

Further, as shown in FIGS. 2A and 2B, a lock frame 9 for fixing the protection system electric connection box 2 to the branch system electric connection box 3 is provided in a protruding manner, and the lock frame 9 is also provided. The lock claw 10 is provided on the branch system electric connection box 3 at a position corresponding to
By locking the connecting portion composed of the lock frame 9 to the lock claws 10, the protection system electric connection box 2 and the branch system electric connection box 3 are directly locked and fixed.

Further, with the lock frame 9 fixed to the lock claw 10, the connector portion 2b of the protection system electric connection box 2 is provided.
Is inserted into the connector storage part 3a of the branch type electrical junction box 3 and the female terminal located in the connector storage part 3a is fitted to the male terminal to form an internal circuit 6 in the protection type electrical junction box 2. The internal circuit 11 of the branch electric junction box 3 is shown in FIG.
It is electrically connected directly as shown in.

Internal circuit 11 of the branch-type electric junction box 3
Is for conducting a small current except for the downstream side of the relay 5, and therefore, in the present embodiment, it is configured by combining a fine electric wire and a pressure contact terminal. On the downstream side of the relay 5, a thick electric wire and a pressure contact terminal are combined. Therefore, the female terminals are crimped to the ends of the thin electric wire and the thick electric wire, and are fitted to the tab-shaped male terminals of the circuit 6 on the protection system electric junction box 2 side. The small current circuit of the branch-type electrical junction box 3 may be formed by a printed wiring board or a flat harness such as an FPC.

Furthermore, each branch electric junction box 3 is also provided with a connector portion 3b for electrically connecting to another external circuit, and is connected to the external circuit 15 by a connector.

When the protection system electric connection box 2 and the branch system electric connection box 3 are divided as described above and these are connected, in particular,
The branch electric junction box 3 has no unnecessary circuits,
Since the internal circuit 11 is mainly formed of a thin electric wire, the size of the internal circuit 11 can be reduced, and thus the size of the internal electrical junction box 1 can be reduced by one size.

FIGS. 3A and 3B show the second embodiment,
(A) is a standard type block 2a ', 2 in which a specified number of fuses 4 and relays 5 are attached to a protection system electrical junction box 2'.
It is formed by combining b '. If a large number of standard type blocks are prepared in this way, the number of blocks can be easily increased or decreased in accordance with the increase in the number of circuits in the branch-type electrical junction box 3. (B) prepares a large number of fuse block 2c 'having a prescribed number of fuses and a relay block 2d' having a prescribed number of relays for the protection system electrical junction box 2 ' Depending on the number of circuits, the required number (four in this embodiment) of fuse blocks 2c ′ and the required number (two in this embodiment).
Relay blocks 2d 'are connected to each other and integrated to form a protection system electrical junction box 2'.

4A and 4B show a third embodiment,
Branch electric junction box 3A with different internal circuit and size
And 3B are provided. Relatively large branch electrical junction box 3
A is an internal circuit corresponding to the highest rank option specification, and is a relatively small electric connection box for small currents 3
B is provided with only a common internal circuit common to all the same vehicle types. In addition to this, it is preferable to previously provide a required branching electric junction box corresponding to the specification difference of the option and the specification difference of the destination. These branch type electric junction boxes are selected and connected to the protection type electric junction box.

FIG. 5 shows a fourth embodiment, in which a control system electric connection box 20 formed by being divided is further connected to a branch system electric connection box 3 connected to a protection system electric connection box 2.
The three electric junction boxes 2, 3 and 20 are integrated. The control system electrical junction box 20 is composed of an electronic unit.

In each of the above embodiments, only the fuse and the relay are mounted in the protection system electric connection box.
It goes without saying that other circuit protection elements such as fusible links, noise filters, capacitors or resistors may be mounted. In addition, the protection system electric connection box 2 and the branch system electric connection box 3 may be fixed by fixing nuts to bolts penetrating both the connection boxes 2 and 3, instead of fixing to the lock claw or the like. Further, it may be configured such that a bolt penetrating one side is screwed into a screw hole provided on the other side and fixed.

[0026]

As is apparent from the above description, according to the present invention, a circuit protection system such as a fuse and a relay and a branch system for branching and absorbing an electric circuit are provided in separate electric junction boxes. Therefore, if there is a circuit change in the branch system circuit, it can be dealt with by changing only the branch system electrical junction box. Also, in the protection system electrical junction box, only the circuit protection elements such as fuses and relays are integrated, so compared to the case where the conventional integrated electrical junction box is distributed, the fuse,
The work space for the relay and the like is reduced, and the size can be reduced accordingly. Also, since the branch type electrical junction box is mainly composed of a small current circuit, the conductive material can be made thin,
The branch electric junction box can be downsized accordingly. Therefore, when the electric connection box that was conventionally integrated is provided separately for the protection system and the branch system and these are connected together, it can be made one size smaller and smaller than the integrated electric connection box, and the installation space can be reduced. .

Further, since the protection system electric connection box can be formed as a block type in which a relay and a fuse are combined or a block type in which a fuse block and a relay block are combined, the shape is simplified. on the other hand,
Since the branch type electric junction box does not need to be provided with a portion for mounting a circuit protection element such as a fuse or a relay, it has a simple shape and can be manufactured at low cost.

Further, in the protection type electric connection box, a standard type block is formed, and the number of the blocks is increased or decreased according to the increase or decrease of the circuit of the branch type electric connection box. The box can easily accommodate circuit changes.

[Brief description of drawings]

FIG. 1A is a schematic view of a conventional integrated electrical junction box,
FIG. 1B is a schematic view of a divided electric junction box according to the first embodiment of the present invention, and FIG. 1C is a schematic view showing a state in which the divided electric junction boxes are connected.

2A and 2B are plan views showing a connecting mechanism of the divided electric junction box of the first embodiment.

3A and 3B are schematic diagrams showing a second embodiment.

4A and 4B are schematic views showing a third embodiment.

FIG. 5 is a schematic diagram showing a fourth embodiment.

[Explanation of symbols]

 1 integrated type electric connection box 2 protection type electric connection box 2a, 2b connector section 3 branch type electric connection box 3a connector storage section 3b connector section 4 fuse 5 relay 6, 11 internal circuit 9 lock frame 10 lock claw 14, 15 external circuit 20 Control system electrical connection box

 ────────────────────────────────────────────────── ─── Continued from the front page (72) Inventor Takahiro Onizuka 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Harness Research Institute, Inc.

Claims (4)

[Claims] 1. An electrical junction box mounted on a vehicle, comprising:
A fuse-type relay box, a fusible link, a noise filter, a protection system electric connection box equipped with a circuit protection element such as a capacitor or a resistor, and a branch system electric connection box equipped with a circuit that performs branch absorption of a conductive path, The protection system electrical connection box and the branch system electrical connection box are provided with an electrical connection part for connecting these internal circuits to each other and an electrical connection part for connecting to another external circuit, respectively, and these electrical connection boxes An electric junction box is provided with a connecting portion for detachably connecting the case, and the case is connected with the internal circuit connected. 2. In addition to the protection system electric connection box and the branch system electric connection box, a control system electric connection box composed of an electronic unit is separately provided, and the internal circuits thereof are electrically connected and detachably coupled. The electrical junction box according to claim 1, which is configured. 3. A plurality of branch electric junction boxes are provided according to a difference in internal circuit, and are selected for use. Also, a plurality of reference electric junction boxes are provided and a reference type is provided according to the number of circuits. The electrical junction box according to claim 1, wherein the electrical junction boxes are used by connecting the types. 4. The electrical connection part for connecting internal circuits provided in the protection system and branch system electrical connection boxes, respectively, comprises female terminals and male terminals, one terminal of which is connected to the outer surface of the case of one of the electrical connection boxes. The electrical connection box according to any one of claims 1 to 3, wherein the electrical connection box is protruding and the other terminal is provided inside the opening of the electrical connection box.