JP2021151109A - Electric junction box - Google Patents

Abstract

To provide an electric junction box capable of improving productivity even when having a complicated solid shape.SOLUTION: An electric junction box 1 includes: a first block 20 and a second block 30 which are mutually different bodies and can load electronic components; a connection wire 40 which electrically connects the first and second blocks 20, 30; and a case 2 which houses the first and second blocks 20, 30 and the connection wire 40 inside. The first block 20 and the second block 30 are arranged at mutually different positions in a manner to offset in a predetermined direction. The first block 20 includes: a relay conducting path 21a which supplies power, supplied from an external power supply to the first block 20, to the second block 30 through the connection wire 40; and a fuse part 24 provided on the relay conducting path 21a.SELECTED DRAWING: Figure 5

Description

The present invention relates to an electrical junction box.

Conventionally, electric junction boxes such as relay boxes mounted on vehicles, which are equipped with a plurality of electronic components and have a bus bar for supplying electric power to the electronic components, have been proposed (for example, patent documents). See 1).

JP-A-2017-022824

Generally, the above-mentioned electric junction box is designed to have a shape that fits in a mounting space (that is, a space designed so as not to interfere with other parts) set in the engine room of a vehicle or the like. Will be done. Therefore, depending on the shape of the mounting space, the electrical junction box may have a complicated three-dimensional shape. In this case, the housing structure of the electrical junction box and the shape of the built-in bus bar are also complicated. Such complications can cause, for example, an increase in the manufacturing cost of the electrical junction box and a decrease in the productivity of the electrical junction box. It should be noted that the complexity of the structure of the electrical junction box, not limited to the electrical junction box mounted on the vehicle, can generally cause the same problem.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electric junction box capable of improving productivity even when it has a complicated three-dimensional shape.

In order to achieve the above-mentioned object, the electric junction box according to the present invention is characterized by the following [1] to [2].
[1]
A first block on which electronic components can be mounted, a second block that is separate from the first block and on which electronic components can be mounted, and a connection that electrically connects the first block and the second block. An electric connection box including an electric wire and a case for accommodating the first block, the second block, and the connecting electric wire inside.
The first block and the second block are arranged at different positions so as to be offset in a predetermined direction.
The first block is
It has a relay conductive path that supplies electric power supplied from an external power source to the first block to the second block via the connecting electric wire, and a fuse portion provided on the relay conductive path.
Must be an electrical junction box.
[2]
In the electrical connection box described in [1] above,
The connecting wire is
A connector for connection is provided at least one of the connection portion between the first block and the connection electric wire and the connection portion between the second block and the connection electric wire.
Must be an electrical junction box.

According to the electrical junction box having the configuration of [1] above, the first block and the second block on which electronic components (for example, relays, fuses, etc.) can be mounted are independent members, and are inside the case of the electrical junction box. Is arranged so as to be offset in a predetermined direction. The first block and the second block are connected via a connecting electric wire. Even if the overall structure of the electrical junction box is complicated by such a divided structure, the structure of the individual members (that is, the first block, the second block, the connecting wire, and the case) constituting the electrical junction box. Can be suppressed from becoming excessively complicated. Further, in the first block in which the electric power is relayed between the external power supply and the second block, a fuse portion is provided on the relay conductive path. Since the magnitude of the electric power supplied to the connecting wire is regulated by the fuse portion, it is not necessary to use a connecting wire having a larger capacity (that is, physically thicker) than necessary. Therefore, it becomes easy to handle the connecting electric wires in the case. Therefore, the electrical junction box having this configuration can improve productivity even when it has a complicated three-dimensional shape.

According to the electrical junction box having the configuration of [2] above, the connecting wire has a connecting connector at at least one end. In other words, at least one end of the connecting wire is connected to the other block (one or both of the second block of the first block) with a connector. When the connector for connection is not provided at the end on the other side, the end on the other side may be connected to the block on the other side by bolting. Therefore, for example, when the first block and the second block are housed in the case, one of the first block and the second block is housed in the case with the connecting electric wire connected to one of the first block and the second block, and then the first block and the first block and the second block and the second block are housed in the case. While connecting the connecting wire to the other side of the second block with a connector, the other side can be accommodated in the case. Thereby, the workability of accommodating the first block and the second block in the case can be improved.

As described above, according to the present invention, it is possible to provide an electric junction box capable of improving productivity even when it has a complicated three-dimensional shape.

The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through the embodiments described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of an electrical junction box according to an embodiment of the present invention. FIG. 2 is a perspective view showing an electrical connection box in which only the first and second upper covers are disassembled. FIG. 3A is a side view of the electrical junction box shown in FIG. 1, and FIG. 3B is a first block, a second block, and a connecting electric wire housed in the case of the electrical junction box shown in FIG. It is a side view which shows the state which the 1st block and the 2nd block are connected by the connecting electric wire. FIG. 4 is a side view showing the first block, the second block, and the connecting electric wire shown in FIG. 3 (b), and shows a state in which the first block and the second block are not connected by the connecting electric wire. FIG. 5 is a schematic configuration diagram of an electric circuit in a state where the first block and the second block are connected by a connecting electric wire.

<Embodiment>
Hereinafter, the electrical connection box 1 according to the embodiment of the present invention shown in FIGS. 1 to 5 will be described with reference to the drawings. The electrical junction box 1 is typically a relay box mounted on a vehicle and accommodating electronic components such as relays and fuses.

As shown in FIGS. 1 and 2, the electrical connection box 1 is assembled to the case 2 and the upper end peripheral edge of the first box portion 11 so as to close the upper end opening of the first box portion 11 of the case 2. 3 and a second upper cover 4 assembled on the upper peripheral periphery of the second box portion 12 so as to close the upper end opening of the second box portion 12 of the case 2. The above three parts constituting the electric junction box 1 are all resin molded bodies.

Hereinafter, for convenience of explanation, as shown in FIGS. 1 to 5, "front-back direction", "left-right direction", "vertical direction", "front", "rear", "left", "right", "top" And define "below". The "front-back direction", "left-right direction", and "vertical direction" are orthogonal to each other. When the electric junction box 1 is mounted on the vehicle, the "vertical direction" corresponds to the vertical direction of the vehicle.

As shown in FIG. 2, the case 2 has a shape in which the first box portion 11 and the second box portion 12 are integrally provided, and the second box portion 12 has a shape with respect to the first box portion 11. It is arranged so as to be offset to the right and to the bottom. The case 2 has such a complicated three-dimensional shape so as to fit in the space for mounting the electric connection box 1 set in the vehicle.

Inside the first box portion 11, a first block 20 having a resin housing on which a plurality of electronic components such as relays and fuses are mounted is housed. Inside the second box portion 12, a second block 30 having a resin housing on which a plurality of electronic components such as relays and fuses are mounted is housed. The first block 20 and the second block 30 are separate bodies. The second block 30 housed in the second box part 12 is arranged so as to be offset to the right and lower side with respect to the first block 20 housed in the first box part 11.

As shown in FIG. 5, the first block 20 contains a first bus bar (metal plate) 21 electrically connected to a plurality of electronic components mounted on the first block 20. The first bus bar 21 is connected to a connector 22 provided so as to be exposed at a predetermined position on the left end portion of the first block 20. The connector 22 is connected to a connector 6 provided at the terminal of the electric wire 5 connected to an external power source (vehicle battery or the like, not shown). As a result, the first bus bar 21 is connected to the external power supply.

A fastening portion 23, which is a part of the first bus bar 21, is exposed at the right end portion on the rear end surface of the first block 20 (see FIGS. 4 and 5). In this example, the fastening portion 23 is a metal nut fixed so as not to rotate. A fuse portion 24 is interposed in the middle of the relay portion 21a connecting the connector 22 and the fastening portion 23, which is a part of the first bus bar 21. The fuse portion 24 (for example, a fusible link) has a function of disconnecting the electrical connection between the connector 22 and the fastening portion 23 when a current exceeding the rated current flows through the relay portion 21a.

As shown in FIG. 5, the second block 30 contains a second bus bar (metal plate) 31 electrically connected to a plurality of electronic components mounted on the second block 30. The second bus bar 31 is connected to a connector 32 (see also FIG. 4) provided so as to be exposed at the rear end portion of the left end surface of the second block 30.

As shown in FIG. 3B, the first block 20 and the second block 30 are electrically connected by a connecting electric wire 40. The connecting electric wire 40 is typically composed of a bundle of a large number of electric wires, and can be bent into an arbitrary shape within a predetermined range. In this example, as shown in FIG. 4, the terminal 41 is connected to the end of the connecting wire 40 on the first block 20 side, and the connector 42 is connected to the end of the connecting wire 40 on the second block 30 side. It is connected.

The terminal 41 of the connecting electric wire 40 is fastened to the fastening portion 23 by tightening a bolt (not shown) inserted through the through hole of the terminal 41 to the fastening portion 23 (nut) of the first bus bar 21. The connector 42 of the connecting electric wire 40 is connected to the connector 32 provided in the second block 30. As a result, the first bus bar 21 (see FIG. 5) built in the first block 20 and the second bus bar 31 (see FIG. 5) built in the second block 30 are electrically connected by the connecting electric wire 40. It is connected to the. Further, the electric power supplied from the external power source to the first block 20 is supplied to the second block 30 via the relay portion 21a of the first bus bar 21 and the connecting electric wire 40.

Here, since the fuse portion 24 is provided in the middle of the relay portion 21a of the first bus bar 21, the size of the electric wire flowing through the connecting electric wire 40 is restricted to the rated current or less. Therefore, it is not necessary to use an electric wire having an excessively large capacity (that is, physically thick) as the connecting electric wire 40, and an appropriate capacity (that is, relatively thin) corresponding to the electric power required by the second block 30 is required. Electric wires are used.

The electrical junction box 1 is assembled by the following procedure. First, a plurality of corresponding electronic components are mounted in the housing of the first block 20 (in which the first bus bar 21 is built) and the housing of the second block 30 (in which the second bus bar 31 is built). do. Next, the terminal 41 of the connecting electric wire 40 is connected to the first block 20 by tightening a bolt (not shown) inserted through the through hole of the terminal 41 of the connecting electric wire 40 to the fastening portion 23 (nut) of the first bus bar 21. do. At this stage, the connector 42 of the connecting electric wire 40 is not connected to the second block 30.

Next, the first block 20 is housed in the first box portion 11. Then, while connecting the connector 42 of the connecting electric wire 40 to the connector 32 of the second block 30, the second block 30 is housed in the second box portion 12. As described above, the assembly of the electrical connection box 1 is completed.

<Action / effect>
From the above, according to the electrical connection box 1 according to the present embodiment, the first block 20 and the second block 30 on which electronic components (for example, relays, fuses, etc.) can be mounted are independent members and are electrically connected. It is arranged so as to be offset in a predetermined direction (front-back direction and left-right direction) in the case 2 of the box. The first block 20 and the second block 30 are connected via a connecting electric wire 40. Even if the overall structure of the electrical junction box 1 is complicated by such a divided structure, the individual members (that is, the first block 20, the second block 30, the connection wire 40, and the connection wires 40) that make up the electrical junction box 1 are , Case 2) can be prevented from becoming excessively complicated. Further, in the first block 20 in which the electric power is relayed between the external power supply and the second block 30, the fuse portion 24 is provided on the relay portion 21a of the first bus bar 21. Since the magnitude of the electric power supplied to the connecting electric wire 40 is regulated by the fuse portion 24, it is not necessary to use the connecting electric wire 40 having a larger capacity (that is, physically thicker) than necessary. Therefore, it becomes easy to handle the connecting electric wire 40 in the case 2. Therefore, the electrical connection box 1 according to the present embodiment can improve productivity even when it has a complicated three-dimensional shape.

Further, according to the electric connection box 1 according to the present embodiment, the connection electric wire 40 has a connector 42 at the end on the second block 30 side, and the end of the connection electric wire 40 on the second block 30 side is a connector. 42 is used to connect to the second block 30. On the other hand, the connecting electric wire 40 has a terminal 41 at the end on the first block 20 side, and the end on the first block 20 side of the connecting electric wire 40 is connected to the first block 20 by bolt fastening using the terminal 41. Will be done. Therefore, when the first block 20 and the second block 30 are housed in the case 2, the first block 20 is housed in the case 2 with the connecting electric wire 40 connected to the first block 20 by bolting, and then the first block 20 is housed. The second block 30 can be housed in the case 2 while the connecting electric wire 40 is connected to the two blocks 30 by using the connector 42. Thereby, the workability of accommodating the first block 20 and the second block 30 in the case 2 can be improved.

<Other forms>
The present invention is not limited to each of the above embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiment, and can be appropriately modified, improved, and the like. In addition, the material, shape, dimensions, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be exhibited.

In the above embodiment, the end of the connecting electric wire 40 on the second block 30 side is connected to the second block 30 by using the connector 42 provided at the end, and the end of the connecting electric wire 40 on the first block 20 side. The portion is connected to the first block 20 by bolt fastening using the terminal 41 provided at the end portion (see FIG. 4). On the other hand, the end of the connecting electric wire 40 on the first block 20 side is connected to the first block 20 by using the connector provided at the end, and the end of the connecting electric wire 40 on the second block 30 side is connected. , It may be connected to the second block 30 by bolt fastening using the terminal provided at the end portion. Further, the end portion of the connecting electric wire 40 on the first block 20 side is connected to the first block 20 by using the first connector provided at the end portion, and the end portion of the connecting electric wire 40 on the second block 30 side. However, it may be connected to the second block 30 by using the second connector provided at the end portion.

Further, in the above embodiment, the electric connection box 1 is a relay box for accommodating a plurality of electronic components, but the electric connection box 1 may be a structure having a function other than the relay box.

Here, the features of the above-described embodiment of the electrical connection box 1 according to the present invention are briefly summarized and listed below [1] to [2], respectively.
[1]
A first block (20) on which electronic components can be mounted, a second block (30) which is separate from the first block (20) and on which electronic components can be mounted, and the first block (20). A case (40) that houses a connecting electric wire (40) that electrically connects the second block (30), the first block (20), the second block (30), and the connecting electric wire (40). 2) and an electrical junction box (1) provided with
The first block (20) and the second block (30) are arranged at different positions so as to be offset in a predetermined direction.
The first block (20) is
A relay conductive path (21a) that supplies electric power supplied from an external power source to the first block (20) to the second block (30) via the connecting electric wire (40), and a relay conductive path (21a). 21a) has a fuse portion (24) provided on the top.
Electrical junction box (1).
[2]
In the electrical connection box (1) described in the above [1],
The connecting electric wire (40) is
A connector (42) for connection is provided at least one of the connection portion between the first block (20) and the connection electric wire (40) and the connection portion between the second block (30) and the connection electric wire (40). ,
Electrical junction box (1).

1 Electrical junction box 2 Case 20 1st block 21a Relay section (conducting path for relay)
24 Fuse part 30 2nd block 40 Connection wire 42 Connector (connector for connection)

Claims (2)

A first block on which electronic components can be mounted, a second block that is separate from the first block and on which electronic components can be mounted, and a connection that electrically connects the first block and the second block. An electric connection box including an electric wire and a case for accommodating the first block, the second block, and the connecting electric wire inside.
The first block and the second block are arranged at different positions so as to be offset in a predetermined direction.
The first block is
It has a relay conductive path that supplies electric power supplied from an external power source to the first block to the second block via the connecting electric wire, and a fuse portion provided on the relay conductive path.
Electrical junction box. In the electrical junction box according to claim 1.
The connecting wire is
A connector for connection is provided at least one of the connection portion between the first block and the connection electric wire and the connection portion between the second block and the connection electric wire.
Electrical junction box.

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