JPH09140029A - Electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric connection box which makes it possible to prevent useless components from being fitted to the connection box body, when there is no need to fit an electric unit. SOLUTION: The bus bars 25 of this electric connection box 23 are composed of bus bars 29 for components for forming a circuit for connecting electric components mutually, and bus bars 36 for a unit for forming a circuit for connecting electric components and an electronic unit 27. And it becomes possible to prevent unnecessary components from being fitted to the connection box body 24, at the connection time of the electric unit 27 to the connection box body 24, by making it possible to remove the bus bars 36 for a unit from the connection box body 24, at the connection time of the electric unit 27 to an electronic unit fitting part 28.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric junction box in which an electronic unit is selectively attached to a junction box body.

[0002]

2. Description of the Related Art FIG. 5 shows an electric junction box 1 described in JP-A-59-148516. In FIG. 1, the electrical junction box 1 includes a wiring board 2, a case 3 that covers the upper surface side of the wiring board 2, and a separate electronic unit 4.
In the wiring board 2, a bus bar 6 is arranged on a predetermined path on an insulating substrate 5 to form a branch circuit 7. Bus Bar 6
Is made of a conductive long plate material and includes a component busbar 8 for connecting electrical components to each other, and a unit busbar 9 for connecting the electronic unit 4 and electrical components and also electrical components. . These bus bars 8 and 9 are bent at substantially right angles at their end portions to form male terminal portions 10, respectively. To the male terminal portion 10, a terminal portion of an electric component such as a relay or a fuse mounted on the case 3 and a male terminal group 11 on the electronic unit 4 side are connected via a relay terminal or the like. The case 3 is formed with a fuse mounting portion 13 in which the fuse 12 is mounted, a hood portion 15 in which the connector 14 of the wire end is mounted, and an electronic unit mounting portion 16 in which the electronic unit 4 is mounted.

The electronic unit 4 includes a wiring board 17 on which a predetermined circuit is formed, and a cover 1 which covers the upper portion of the wiring board 17.
8 and. On the wiring board 17, a predetermined circuit is printed on an insulating substrate 19. The electronic element 20 and the connection terminal group 11 are connected to this circuit.

The electric connection box 1 is assembled by mounting the case 3 on the wiring board 2 and the electronic unit 4 on the electronic unit mounting portion 16. At this time, the male terminal group 11 of the electronic unit 4 is connected to the terminal of the bus bar 9 for units, and is connected to an electric component. Further, the electric components are connected to each other by a component bus bar 8 and a unit bus bar 9.

In such an electric connection box 1, the electronic unit 4 may not be attached to the wiring board 2 depending on the vehicle type or vehicle class. In this case, the electronic unit 4 is used without being attached to the electronic unit attaching portion 16.

[0006]

However, even when the electronic unit 4 is not attached to the wiring board 2, the unit busbar 9 is attached to the wiring board 2, so that the unit busbar 9 should be used for this unit. Useless part (the part for connecting the electronic unit and the branch circuit)
Occurs. As a result, since the unit bus bar 9 having a portion that is not used is arranged on the wiring board 2 even when the electronic unit 4 is not attached, the manufacturing cost of the electric junction box 1 alone is high.

For this reason, the electronic unit 4 is mounted and an electric junction box without the electronic unit mounting portion 16 is set,
If the electronic unit 4 is unnecessary, it is conceivable to use this electric connection box, but since different types of electric connection boxes are set, the manufacturing cost of the electric connection box is higher.

Therefore, an object of the present invention is to provide an electric junction box in which unnecessary parts are not assembled in the junction box body when it is not necessary to attach an electronic unit.

[0009]

To achieve the above object, the invention according to claim 1 is provided with a plurality of electric component mounting portions to which relays and fuses are mounted and an electronic unit mounting portion to which an electronic unit can be coupled. A connection box main body, and an electric connection box having a bus bar that is built in the connection box main body to form a branch circuit, and a bus bar for parts that forms a circuit in which electric parts are connected to each other, It is formed by a unit bus bar that forms a circuit to which the electric component and the electronic unit are connected, and the unit bus bar is removable from the connection box body when the electronic unit is not coupled to the electronic unit mounting portion. To do.

In this electrical junction box, when an electronic unit is required, the electronic unit is attached to the electronic unit attachment portion with the unit busbar attached to the junction box body. When the electronic unit is not needed, that is, when the electronic units are not coupled, the unit busbar is removed from the junction box body and used without assembling useless parts in the junction box body. In this case, since the bus bar forming the branch circuit is formed by the bus bar for parts that connects only the electric parts to each other and the bus bar for the unit that connects only the electric parts and the electronic unit, the bus bar for the unit when the electronic units are not coupled. Only can be removed from the junction box body.

The invention according to claim 2 is the electrical junction box according to claim 1, characterized in that a groove portion into which the bus bar for unit is inserted and arranged is formed in the junction box body.

In this electric junction box, when the electronic unit is not required, that is, when the unit is not joined, the unit busbar is not inserted and arranged in the groove portion of the junction box body, and only the component busbar is used. If an electronic unit is required, the bus bar for the unit is inserted and arranged in the groove, the electronic unit is attached to the electronic unit attachment portion, and the electronic unit and the branch circuit of the connection box body are connected.

[0013] The invention of claim 3 is claim 1 or claim 2.
The electrical junction box described in (1) above is characterized in that a separate relay block can be attached to the electronic unit attachment portion when the electronic unit is not coupled to the electronic unit attachment portion.

In this electric junction box, when the electronic unit is not required, a separate relay block is attached to the electronic unit attachment portion, so that the empty space of the junction box body can be effectively used.

According to a fourth aspect of the present invention, there is provided the first to third aspects.
The electrical connection box according to any one of claims 1 to 4, wherein the electrical component mounting portion has a hood portion to which the relay or fuse is fitted, and the plate-shaped terminal portion of the busbar for components is projected into the hood portion. In addition to being installed, a plate-shaped terminal portion formed at one end of the unit bus bar is projected, and the other end of the unit bus bar is accommodated in a separate cassette connector attached to the electronic unit attachment portion. And

In this electrical junction box, in order to attach a relay or fuse to the electrical component attachment portion of the junction box body, the relay or fuse is fitted to the hood portion to connect the male terminal portion of the bus bar to the relay or fuse. Can be connected. When connecting the electronic unit to the electronic unit mounting portion, attach a separate cassette connector to the electronic unit mounting portion, connect the unit bus bar and the cassette connector, and connect the cassette connector and the electronic unit. To do.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electric junction box according to the present invention will be described below with reference to the drawings. FIG.
(A) shows a state in which the electronic unit 27 is not attached to the electronic unit attachment portion 28, and the electronic unit 27 is not attached, (b) shows the unit bus bar 36, (c) shows the electronic unit 27 attached to the electronic unit attachment portion 28. Shows the state. 2 shows a connection state between the male terminal portion 39 of the terminal of the unit bus bar 36 in the electronic unit mounting portion 28 and the electronic unit 27, and FIG. 3 shows a female terminal fitting 43 of the wire harness 42 terminal and the electronic unit. The connection state with 27 is shown.

As shown in FIGS. 1 (a) and 1 (c), the electrical junction box 23 in the present embodiment comprises a junction box main body 24 and a bus bar 25 arranged in the junction box main body 24 to form a branch circuit. Is equipped with.

The junction box body 24 is provided with a plurality of electric component mounting portions 26 to which relays and fuses are mounted, and an electronic unit mounting portion 28 to which an electronic unit 27 can be connected. The electric component mounting portion 26 is provided with a hood portion projectingly provided on one surface side of the connection box body 24 and into which a relay or a fuse is fitted, and on the other surface side, a male terminal formed at the end of the bus bar 25. A plurality of terminal accommodating chambers 31 in which the parts are accommodated are open. In addition, in the connection box body 24, between the terminal accommodating chambers 31 and between the terminal accommodating chambers 31 and the electronic unit mounting portion 2
A bus bar mounting groove 33 is formed so as to connect with 8. The bus bars 25 are housed in the bus bar mounting grooves 33, respectively.

The bus bar 25 is composed of a component bus bar 29 forming a circuit in which electric components are connected to each other, and a unit bus bar 36 forming a circuit in which only the electric component and the electronic unit 27 are connected. The bus bar 29 for parts is
The terminal accommodating chamber 3 in which electric parts of the bus bar 25 are mounted
It is housed in the busbar groove portion for parts connecting between them, and the busbar for unit 36 is housed in the busbar groove portion for unit 35 connecting the electronic unit mounting portion 28 and the terminal housing chamber 31 in which the electric component is mounted. In addition, the unit bus bar 36 is used for mounting the electronic unit 2 on the electronic unit mounting portion 28.
The unit bus bar 36 is detachable from the junction box body 24 when the seven are not coupled.

The electronic unit mounting portion 28 is provided with mounting holes 34 penetrating the front and back of the connection box body 24. On one inner wall 45 of the mounting hole 34, two convex support portions 4 are provided.
6, 46 are projected. These support portions 46, 46
Engages with the electronic unit 27 inserted in the mounting hole 34 to support the electronic unit 27 in the mounting hole 34. In addition, the inner wall 47 facing the inner wall 45 is provided with a projecting support portion 48 at an intermediate portion. The cassette connector 37 is supported by the support portion 48 as shown in FIG.

The cassette connector 37 comprises bus bar housings 49, 49 on both sides and a wire harness housing 50 integrally provided between the bus bar housings 49, 49. Bus bar housing 4
9. Terminal housing chambers 51 and 52 (see FIGS. 2 and 3) are formed in the wire harness housing 50, respectively.

Terminal housing chamber 5 of bus bar housing 49
As shown in FIG. 2, a relay terminal 53 is accommodated in the inside of the unit 1. The relay terminal 53 has female terminal portions 54,
54 is formed, the male terminal portion 38 of the electronic unit 27 inserted into a mounting hole 34 described later is inserted into one female terminal portion 54, and the unit terminal is provided inside the other female terminal portion 54. The male terminal portion 39 of the terminal of the bus bar 36 is inserted. Further, in the terminal accommodating chamber 52 of the wire harness housing 50, as shown in FIG. 3, the female terminal fitting 43 of the terminal of the wire harness 42 is accommodated. The male terminal portion 38 of the terminal of the internal circuit of the electronic unit 27 is inserted into the female terminal fitting 43.

The electronic unit 27 is a box containing an internal circuit, and has a connector portion 55 formed on one surface side.
The connector portion 55 has a hood portion 5 protruding from the outer periphery.
6 and the male terminal portion 3 projectingly provided in the hood portion 56
8 and. The male terminal portion 38 is connected to the internal circuit of the electronic unit 27 as described above.

With the electronic unit 27 mounted in the mounting hole 34, as shown in FIGS. 2 and 3, the cassette connector 37 is fitted in the hood portion 56, and a part of the male terminal portion 38 is a bus bar. Terminal accommodating chamber 5 of housing 49 for
1 is inserted into the female terminal portion 54 of the relay terminal 53. As a result, the male terminal portion 39 of the unit bus bar 36 and the internal circuit in the electronic unit 27 are connected via the relay terminal 53. Further, a part of the male terminal portion 38 is provided in the terminal accommodating chamber 5 of the wire harness housing 50.
2 is inserted into the female terminal fitting 53. As a result, the internal circuit of the electronic unit 27 and the wire harness 42 are connected.

Next, in the electric junction box 23, a case where the electronic unit 27 is coupled to the junction box main body 24 and a case where the electronic unit 27 is not coupled will be described.

When the electronic unit 27 is connected to the junction box body 24, the unit busbar 36 is inserted into the unit busbar groove 35 and attached to the junction box body 24. Then, the cassette connector 37 is attached to the electronic unit attachment portion 28, and the male terminal portion 39 of the unit bus bar 36 is connected to one female terminal portion 54 of the relay terminal 53. Next, the electronic unit 27 is inserted into the mounting hole 34, and as shown in FIGS. 2 and 3, the hood portion 56 of the connector portion 55 is inserted.
The cassette connector 37 is fitted therein.

When the cassette connector 37 is fitted in the hood portion 56, as shown in FIG. 2, a part of the male terminal portion 38 of the electronic unit 27 is inserted into the relay terminal 53 and the electronic signal is transferred through the relay terminal 53. It is connected to the internal circuit of the unit 27. As a result, the internal circuit of the electronic unit 27 and the branch circuit in the connection box body 24 are connected. The remaining male terminal portion 38 of the electronic unit 27 is inserted into the female terminal portion 54 as shown in FIG. As a result, the internal circuit of the electronic unit 27 and the wire harness 42 are connected.

Next, the connection box body 24 of the electronic unit 27
1A, the unit busbar 36 is not inserted into the unit busbar groove portion 35 of the connection box body 24, or the unit busbar 36 is already connected to the unit busbar as shown in FIG. When inserted in the groove 35, the unit bus bar 36 is removed from the bus bar groove 35. Further, the cassette connector 37 is removed from the inside of the mounting hole 34.

In the electric connection box 23 of this embodiment, when the electronic unit 27 is not needed, the unit busbar 36 and the cassette connector 37 can be removed from the connection box main body 24, so that the electronic unit 27 is not used. Since the parts are not attached to the junction box body 24 and the parts are not wasted, the manufacturing cost of the electric junction box can be reduced.

Further, since it is not necessary to set the electric junction box without the electronic unit mounting portion 28, the manufacturing cost of the electric junction box can be reduced also by this.

Next, another embodiment shown in FIG. 4 will be described. The present embodiment is an example in which a separate relay block 57 is attached to the electronic unit attachment portion 28 when the electronic unit 27 is not coupled to the junction box body 24. In this case, the relay block 57 is supported in the mounting hole 34 by supporting the relay block 57 by the supporting portions 46, 48, 48 that support the cassette connector 37 and the electronic unit 27 in the mounting hole 34.
Attach.

According to this embodiment, when the electronic unit 27 is not coupled, the separate relay block 57 is attached to the electronic unit attaching portion 28, so that the empty space of the connection box body 24 can be effectively used.

[0034]

As described above, according to the first aspect of the present invention, when the electronic unit is unnecessary, the unit busbar can be removed from the junction box body to assemble useless parts into the junction box body. Therefore, the manufacturing cost can be reduced.

According to the second aspect of the present invention, when the electronic unit is not required, the unit busbar is removed from the groove portion of the connection box body, so that unnecessary parts are not assembled to the connection box body and the manufacturing cost is reduced. It can be reduced.

According to the third aspect of the present invention, when the electronic unit is not required, by mounting a separate relay block on the electronic unit mounting portion, it is possible to effectively use the empty space of the junction box body. By mounting the relay block on the junction box body, it is possible to effectively use other space.

According to the fourth aspect of the present invention, when the electronic unit is attached to the electronic unit mounting portion, one end of the unit bus bar and the cassette connector are connected to each other, and the cassette connector and the electronic unit are connected to each other, so that the electronic unit is connected. The unit and the bus bar for the unit can be easily connected.

[Brief description of the drawings]

FIG. 1 shows an embodiment of an electrical junction box according to the present invention,
(A) is a plan view showing a state in which the electronic unit is not coupled to the electronic unit mounting portion, (b) is a front view showing the unit bus bar, and (c) is a plan view showing a state in which the electronic unit is mounted to the electronic unit mounting portion. It is a figure.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1C, showing a connection state between the electronic unit and the unit bus bar.

FIG. 3 is a cross-sectional view showing a connection state between an electronic unit and a terminal fitting of an electric wire end, taken along line III-III in FIG.

FIG. 4 is a plan view showing a state in which a separate relay block is attached to the electronic unit attachment portion.

FIG. 5 is an exploded perspective view showing a conventional electric junction box.

[Explanation of symbols]

 23 Electrical Junction Box 24 Junction Box Main Body 25 Bus Bar 26 Electric Component Mounting Part 27 Electronic Unit 28 Electronic Unit Mounting Part 29 Bus Bar for Parts 35 Bus Bar Groove 36 Bus Bar for Unit 37 Cassette Connector 57 Relay Block

Claims (4)

[Claims] 1. A connection box main body provided with a plurality of electric component mounting parts to which relays and fuses are mounted and an electronic unit mounting part to which an electronic unit can be connected, and a branch circuit built in the connection box main body. A busbar for forming a busbar, the busbar for parts forming a circuit connecting the electric parts to each other, and the busbar for a unit forming a circuit connecting the electric parts to an electronic unit. The electric connection box, wherein the bus bar for unit is removable from the main body of the connection box when the electronic unit is not coupled to the electronic unit attachment portion. 2. The electrical junction box according to claim 1, wherein the junction box main body is provided with a groove portion into which the unit bus bar is inserted and arranged. 3. The electric junction box according to claim 1, wherein a separate relay block can be attached to the electronic unit attachment portion when the electronic unit is not coupled to the electronic unit attachment portion. An electrical junction box characterized by being present. 4. The electrical connection box according to claim 1, wherein the terminal housing chamber of the electrical component mounting portion has a male terminal portion formed at one end of a bus bar for unit. And a male terminal portion at the other end of the unit bus bar is housed in a separate cassette connector attached to the electronic unit attachment portion.