JP3409252B2 - Connection structure between electrical junction box and wire harness - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection structure for an electric connection box and a wire harness used in an automobile, and more particularly, by connecting a large number of connector fitting portions for connecting a wire harness formed in the electric connection box. This simplifies the shape of the bus bar that forms the internal circuit of the box and reduces the number of stacked bus bars.

[0002]

2. Description of the Related Art Conventionally, in an electric connection box such as a junction box mounted on an automobile, connector fitting portions for a large number of wire harnesses are individually provided on the outer surface of the case of the electric connection box. For example, in the electrical junction box 1 shown in FIGS. 5A and 5B, the first door harness connector fitting portion C1, the second door harness connector fitting portion C2, and the first front harness are provided on the upper surface of the upper case 2. Connector fitting portion C3, second front harness connector fitting portion C
4, a floor harness connector fitting portion C5 and a roof harness connector fitting portion C6 are separately provided at intervals. Further, a fuse fitting part F and a diode fitting part D are also provided in other parts of the upper case 2.

Further, as shown in FIG. 5 (C), also on the lower case 3 side of the electric junction box 1, connector fitting portions C7 to C10 and relays for various wire harnesses (ECU harness, instrument panel harness, cowl harness, etc.) and relays. Fitting portions R1 to R3 are provided.

The above-mentioned many connector fitting portions C1 to C1
0 is a wire harness W / H arranged on the vehicle body
Are fitted and connected to the respective connectors attached to the terminals.

[0005]

In the inside of the electric junction box 1, as shown in FIG. 6, a bus bar 5 forming an internal circuit is formed.
~ 9 are accommodated, but as described above, the electrical junction box 1
When a large number of connector fitting portions C1 to C10 are provided on the upper case 2 and the lower case 3 in a distributed manner, connection terminals (bus bar 5 to bus bar 5) that are connected to the respective wire harnesses at the positions of the terminal holes of these connector fitting portions. It is necessary to position the tabs 5a to 9a protruding from 9 or the relay terminals (not shown) connected to the tabs 5a to 9a. That is, the positions of the terminals protruding from the bus bars 5 to 9 are limited to the predetermined positions of the connector fitting portions C1 to C10, and as a result, the shapes of the bus bars 5 to 9 forming the internal circuit of the electrical junction box 1 are formed. Becomes very complicated, bus bar 5
There is a problem that it is difficult to handle and arrange the nine.

Therefore, it takes time to design the bus bar,
Moreover, since it is necessary to dispose the electric connection box inside the electric connection box with high precision, it takes a lot of work. Furthermore, since the terminals must be projected from the required busbars at the required positions, the arrangement of the busbars is complicated, and if the busbars cannot be placed on one plane, it is necessary to stack the busbars on the top and bottom. There is a problem in that the electric connection box increases in size as well as the cost increases.

The present invention has been made in view of the above-mentioned problems, and by assembling the connector fitting portions on the side of the electrical connection box, which are connected to a large number of wire harnesses, the arbitrary positions of the terminal holes of the connector fitting portions can be obtained. It is an object of the present invention to simplify the structure of the bus bar that constitutes the internal circuit of the electric junction box by enabling the terminal to be connected to the wire harness to be located, and to reduce the required number of laminated bus bars.

[0008]

In order to solve the above problems, the present invention relates to an electric junction box which is connected to a wire harness arranged in an automobile, which is connected to a power source side and which houses an internal branch circuit. , A large-area connector fitting portion is provided in the electric connection box for connection with the wire harness, and various types including a door harness, a floor harness, a front harness, a roof harness, an instrument panel harness, a cowl harness, and an ECU harness. At least 2 of the terminal connectors connected to the wire harness
Attach the terminal at one end of the sub-cord to multiple terminal connectors that are connected to more than one type of wire harness,
The terminals of the other ends of these sub-cords are attached to a collective connector, and the collective connector is fitted into the large-area connector fitting portion of the electric connection box for electrical connection, and is housed inside the electric connection box. The tab protruding from the bus bar or the relay terminal connected to the tab is located in an arbitrarily selected terminal hole among the terminal holes of the large-area connector fitting portion formed in a concentrated manner, and at this position, There is provided a connection structure between an electric connection box and a wire harness, characterized in that terminals attached to terminals of required sub-codes to be connected to the collective connector are located and terminals are connected to each other.

As described above, the connectors attached to the terminals of various wire harnesses are not directly connected to one connector fitting portion of the electrical junction box, but the connectors attached to the terminals of various wire harnesses are temporarily attached to each terminal. The collective connector, which is connected to the connector and is connected to each of the terminal connectors through the sub-cord, is fitted to the connector fitting portion formed on the electric connection box. With this configuration, by appropriately selecting the position of the cavity of the collective connector to which the sub-code terminal is attached, on the connector fitting portion side of the electric connection box side, a tab protruding from the bus bar into the terminal hole, Alternatively, the relay terminal connected to the tab can be positioned at any appropriate position. As a result, the shape of the busbars can be simplified and the arrangement of the busbars can be simplified, so that the number of stacked busbars can be reduced.

With the above structure, there is almost no restriction on the position of the tab protruding from the bus bar, the structure of the bus bar is easy and simple, and the number of stacked bus bars is reduced.
As a result, the electrical junction box can be made smaller and thinner.

Further, the present invention is an electric connection box which is connected to a wire harness arranged in an automobile, which is connected to a power source side and which houses an internal branch circuit, in order to connect with the wire harness. Of the terminal connectors that are provided with one large-area connector fitting part in the connection box and are connected to various wire harnesses including door harness, floor harness, front harness, roof harness, instrument panel harness, cowl harness, and ECU harness, respectively. , A terminal at one end of the sub-cord is attached to a plurality of terminal connectors respectively connected to at least two types of wire harnesses, and most of the terminals at the other end of the sub-cord are attached to the collective connector. While fitting with the large area connector fitting part of the electrical junction box for electrical connection The terminal at the other end of some sub-cords is directly attached to another terminal connector, and the electric connection box is characterized by not splicing the electric wires of each sub-cord and the electric wires of various types of wire harnesses. We provide connection structure for wire harness.

That is, when it is necessary to connect wire harnesses of different types and to connect the connection destination to another circuit or the like, the above connection is performed by the bus bar of the internal circuit of the electric connection box, If you want to directly connect the wires of the harness, you can connect the terminal connector to which one of the wires you want to connect is connected and the other terminal connector to which the other wire is connected by connecting with one sub cord. Often, it is not necessary to splice the electric wires of the wire harness, and the number of splicing steps can be reduced. Further, since the short-circuited portion does not need to be formed by the bus bar, the shape of the bus bar can be easily made. When a fuse and a relay are interposed, it is necessary to connect the relay and the fuse connected via the bus bar in the electric connection box.

The door harness and the floor harness which are connected to the electric connection box by concentrating the connector fitting portions provided in the upper case and / or the lower case of the electric connection box and providing only the connector fitting portion having the large area. ,
A large number of terminal connectors connected to the front harness, roof harness, instrument panel harness, cowl harness, and ECU harness are connected to the collective connector via the sub-cord.

For example, in the upper case of the electric junction box, the fuse fitting portion and the diode fitting portion are located on one side, and one large connector fitting portion is provided in the remaining large area portion. With this configuration, when various wire harnesses that fit into the electrical connection box are connected to each terminal connector,
All the wire harnesses can be connected to the internal circuit of the electric connection box only by fitting the collective connector connected to each terminal connector 1 through the sub-cord with one connector fitting portion on the electric connection box side. Moreover, since one connector fitting portion provided in the electric junction box has a large area, the bus bar is connected to the tab,
Alternatively, since the relay terminal connected to the tab may be located, the handling of the bus bar becomes very easy and the design of the bus bar becomes easy.

[0015]

[0016]

[0017]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an electrical junction box 10 of the present invention and a collective connector 14, 15 for connecting to the electrical junction box 10. The electric junction box 10 is composed of an upper case 12 and a lower case 13 which are molded of resin, and accommodates bus bars 16, 17, 18 which are connected to the power source side and which constitute an internal circuit inside, and are routed to an automobile. It is connected to a wire harness (door harness, floor harness, front harness, roof harness, instrument panel harness, cowl harness, ECU harness). on the other hand,
The collective connectors 14 and 15 are large resin female connectors, and each terminal connector C1 ′ to
It is connected to C7 'and C8' to C11 '.

The upper case 12 occupies approximately half of the upper surface 12a, and one large connector fitting portion 12b is provided in the portion.
Are provided and are collectively formed in a large area so that they can be connected to two or more types of wire harnesses. In the present embodiment, the connector fitting portion 12b includes the first and second connector fitting portions 12b.
For connecting the connector for door harness, the connector for first and second front harness, the connector for floor harness, the connector for roof harness, the area where the number of tabs and the like corresponding to the number of poles of each harness can be set up In addition to having the terminal holes 12c, the terminal holes 12c are arranged in parallel and regularly in the vertical and horizontal directions.

In addition, a fuse fitting portion F'and a diode fitting portion D'are provided on the remaining portion of the upper surface 12a of the upper case 12, and an insertion hole 12d for inserting a fuse tab and a diode tab is also provided. ing.

On the other hand, the lower case 13 is also provided with one large connector fitting portion 13b on the lower surface 13a, and this connector fitting portion 13b, like the connector fitting portion 12b of the upper case 12, has various wire harnesses (ECU). The terminal hole 13c is provided with an area where tabs and the like can be erected up to the number of poles of the respective connectors of the harness, instrument panel harness, cowl harness, and the like.

FIG. 2 shows bus bars 16, 17, and 18 accommodated in the electric junction box 10. Bus bar 1
6 and 17 are mainly the connector fitting portion 12 of the upper case 12.
The bus bar 18 mainly corresponds to the lower case 13 connector fitting portion 13b.

The bus bars 16, 17, 18 are formed by punching a conductive plate such as a brass plate into a required shape for a circuit, and tabs 16a,
17a and 18a are formed by bending and standing. The tabs 16a of the bus bar 16 are mainly connected to the first and second floor harnesses, the first and second front harnesses, and the roof harness, and the tabs 17a of the bus bar 17 are the first and second door harnesses, relays, and fuses. The tab 18a of the bus bar 18 is adapted to be connected to an ECU harness, an instrument panel harness, a cowl harness, or the like. In addition, when connecting, there is also provided a portion connected to the tab 16a or the like via a relay terminal (not shown).

In the bus bars 16, 17, and 18, the upper case 12 and the lower case 13 are provided with the connector fitting portions 12b and 13b as described above, so that the tabs 16a and the like are provided at one place. Since it can be formed and a large number of parts that wrap around in the circuit can be eliminated, it is formed in a simple shape. Moreover, the tabs 16a and the like can be provided at arbitrary positions corresponding to the terminal holes 12c and 13c that are regularly arranged in the connector fitting portions 12b and 13b, so that the tabs 16a and the like are also regular. It may be provided in an array state. In addition, in this way, the bus bar 1
By simplifying the shape of 6a or the like, it is possible to reduce the number of places where the upper and lower busbars need to be stacked due to the circuit, and the required number of stacked busbars can be reduced.

The collective connector 14 shown in FIG. 3 is a female connector made of resin having a size for connection and fitting corresponding to the connector fitting portion 12b of the upper case 12, and the terminal hole 12d of the connector fitting portion 12b. And the corresponding cavities 14a.

The collective connector 14 is attached by inserting and locking the terminals attached to one end of the sub-cord 19 into the terminal connectors C1 'to C7' which are connected to two or more kinds of wire harnesses. The terminal attached to the end is inserted and locked in the cavity 14a of the collective connector 14 to be attached. Specifically, terminal connectors C1 ′ and C2 ′ are provided corresponding to the first and second floor harnesses, and similarly, terminal connectors C3 ′ and C4 ′ are provided on the first and second front harnesses and a terminal connector C5 is provided on the roof harness. ', C6 on first and second door harness, C
7'correspondingly provided, and the above-mentioned terminal connector C1 '
Terminals 19a attached to one end of the sub-cord 19 are inserted and locked in the cavities C1a 'and the like, and terminals 19a are similarly attached and inserted and locked in the collective connector 14 on the other end side.

In the present embodiment, each terminal connector C described above is used.
1'-C7 'are male connectors made of resin, and female connectors are attached to various wire harness terminals and are fitted into male and female.

On the other hand, each of the above-mentioned terminal connectors C1 'to C7'
Sub-cord 1 with one end connected to the cavity C1 '
At the other end of 9, the collective connector 14 is connected to the connector fitting portion 12b.
When the mating connection is made, the required sub-cord 19 and the desired tab 16a to be connected are inserted into the cavity 14a of the collective connector 14 at the same position.

As described above, the terminal 19a at the other end of most of the sub-cord 19 connected to each terminal connector C1 'and the like.
Is connected to the busbar 16 forming the internal circuit of the electric junction box 10 via the collective connector 14, but when it is desired to directly connect a part of the wire of the wire harness to another wire harness without the busbar in terms of the circuit. , The terminal 19a 'of the other end of a part of the sub-cord 19' is directly attached to another terminal connector so that the electric wires of each sub-cord are not spliced.

For example, when the required electric wires of the first floor harness and the required electric wires of the second floor harness are directly connected without passing through the bus bar, as shown in FIG. 4, the terminal connector C1 'corresponding to the required electric wire position is provided. Cavity C1a '
One end of the sub-cord 19 'for direct connection is inserted in, and the other end of the sub-cord 19' is inserted in the required cavity C2a 'of the terminal connector C2' to make it conductive. In this way, the electric wires of various wire harnesses that need to be directly connected are connected by the sub-cord 19 'for direct connection.

Further, the connector fitting portion 1 of the lower case 13
The collective connector 15 to be fitted and connected to the 3b is also various connectors C7 'to C1 by the sub-code 19 in the same manner as above.
Subcode 19 'for connecting 0'and direct connection
Direct connection of required electric wires for various harnesses is made by.

The upper case 12, the lower case 13,
In order to form the electrical junction box 10 from the bus bars 16, 17, and 18, as shown in FIG. 1, the bus bars 16, 17, and 18 are stacked in three layers inside the upper case 12 and the lower case 13, and then housed. , Each case is combined.
More specifically, the tab 16a or the like of the bus bar 16 or the relay terminal connected to the tab 16a or the like is used as the connector fitting portion 12
b, 13b arbitrarily selected terminal holes 12c, 13
It is located and stored in c.

After that, the collective connectors 14 and 15 are fitted and connected to the connector fitting portions 12b and 13b, and the terminals are connected to the tabs 16a and the like of the bus bar 16 and the like forming a required internal circuit, and the electrical connection is made. Specifically, a connection portion with an external circuit formed by various harnesses is formed.

The connection structure of the electric junction box 10 and the wire harness is not limited to the above-mentioned form,
For example, the number of terminal connectors may be increased or decreased according to various applicable harnesses, and only the lower case connection structure may be the same as the conventional structure.

[0034]

As is apparent from the above description, by using the connection structure of the electric connection box and the wire harness according to the present invention, the shape of each bus bar can be simplified and the number of laminated layers can be reduced. Therefore, the cost for manufacturing the electric junction box can be reduced. Also, instead of connecting various wire harnesses directly to the electrical junction box,
The connection workability can be improved by connecting the one end to the collective connector having the sub-cord.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an electric junction box of the present invention.

FIG. 2 is a perspective view of a bus bar housed inside the electrical junction box of the present invention.

FIG. 3 is a schematic diagram showing a connection state of a collective connector and a terminal connector.

FIG. 4 is a schematic view showing a direct connection between terminal connectors.

FIG. 5 is a conventional electric junction box, (A) is a plan view,
(B) is a side view and (C) is a bottom view.

FIG. 6 is a perspective view of a conventional bus bar.

[Explanation of symbols]

1, 10 electrical junction box 12 upper case 12b, 13b Connector fitting part 13 lower case 14, 15 Batch connector 19 subcode C1 'to C11' terminal connector

Continuation of the front page (56) Reference JP-A-9-150650 (JP, A) JP-A-10-275639 (JP, A) JP-A-9-307245 (JP, A) Actual development Sho-61-180465 (JP , U) Actual Kaihei 6-80318 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 3/16 B60R 16/02 H01R 4/00 H01R 9/03 H01R 25/16

Claims (3)

(57) [Claims] 1. A wire harness connected to an automobile
Connected to the power supply side and accommodates the internal branch circuit.
In the electrical junction box, One in the electrical junction box for connecting to the wire harness
The large area of the connector mating part of
Harness, front harness, roof harness, in
It consists of panel harness, cowl harness and ECU harness.
Terminals connected to various types of wire harnesses.
For at least two types of wire harness
Subcode to multiple terminal connectors that are connected respectively
Attach the terminal at one end of the
The child is attached to the collective connector, and the collective connector is
Electrical connection by fitting with the large area connector fitting part of the air connection box
ConnectionAnd Projected from the bus bar housed inside the electrical junction box
The tabs or relay terminals connected to the tabs are
Of the terminal holes of the large area connector fitting part formed on
Place it in the terminal hole that you have selected, and
Attach to the terminal of the required sub-code to connect to the connector
The terminals are located so that the terminals are connected to each other.
Collect Connection structure between electrical junction box and wire harness. 2.Connects to the wire harness that is routed to the vehicle.
Connected to the power supply side and accommodates the internal branch circuit.
In the electrical junction box, One in the electrical junction box for connecting to the wire harness
The large area of the connector mating part of
Harness, front harness, roof harness, in
It consists of panel harness, cowl harness and ECU harness.
Terminals connected to various types of wire harnesses.
For at least two types of wire harness
Subcode to multiple terminal connectors that are connected respectively
Attach the terminal at one end of the
Most of the children are attached to the collective connector, and the collective connector
The connector with the large area connector fitting part of the electrical junction box
Fits and makes electrical connection, and the other end of some sub-codes
The terminal of is directly attached to the other terminal connector,
Wires of cords and wires of various types of wire harness
Characterized by not splicing each other Electrical
Connection structure of connection box and wire harness. 3. The upper case of the electric junction box or
Do not concentrate the connector fitting part provided on the lower case and / or the lower case.
In addition, only the large area connector fitting part is provided
Door harness and floor harness connected to the connection box
Front harness, roof harness, instrument panel
Ness, cowl harness, many connected to ECU harness
Connect several terminal connectors at once via the above sub-code.
The connection structure for connecting an electric connection box and a wire harness according to claim 1 or 2, which is connected to a wiring harness.