JPH09308047A - Connection structure of electric connection box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the connection places and the number of parts, and raise the electric conductivity of a circuit and the reliability, and improve the work efficiency. SOLUTION: This is connection structure to connect electric connection boxes 31 and 33 which have bus bars 47 and 49 projecting outward, and here a bolt 59 is planted in the pedestal 57 provided at the outer box 35 for accommodating electric connection boxes 31 and 33, and also the bus bar 49 of the electric connection box 33 is provided with a fixing part 51. The bolt 59 is inserted into the screw holes 53 and 55 made at this fixing part 51 and the bus bar 47 of the electric connection box 31d, and it is fixed with a nut 73 to connect the electric connection boxes 31 and 33.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure for connecting electric connection boxes that branch or relay electric power or electric signals between electric devices.

[0002]

2. Description of the Related Art Japanese Unexamined Utility Model Publication No. 5-43717 discloses a "junction structure for a branch junction box" as shown in FIGS.

As shown in FIG. 5, this is an undercover of a junction block 1 (J / B: branch junction box) and a fusible link block 3 (FL / B: branch junction box).
5 is connected inside.

Each of the blocks 1 and 3 is for branching an electric wire between, for example, an on-vehicle electric device, and is a relay or a fuse.
And an internal circuit connecting them, and the internal circuit is composed of a bus bar of a conductive metal plate, an electric wire, a printed wiring board, and the like.

As shown in FIG. 6, in this connection structure, the bus bar 7 of the block 1 serves as a joining pedestal, the bus bar 9 of the block 3 serves as a seat plate, and the fixed plate 1 formed in an L-shape.
Prepare 1.

As shown in FIG. 5, one end portion of the fixing plate 11 and the bus bar 7 are respectively attached to the bolt holes 13 and 15 by the bolts 1.
The nut 7 is threaded through 7 to be connected and fixed. The bolt 17 is embedded in the tip of the pedestal 21 protruding from the bottom of the under cover 5. Further, as shown in FIG. 6, the other end of the fixing plate 11 and the bus bar 9 are connected and fixed to the side surface of the block 3 together with the terminal 25 of the power supply wire 23 from the battery by tightening with the bolt 27.

[0007]

However, in the structure of the above publication, since the bus bars 7 and 9 are connected through the fixing plate 11, there are two connection points between the blocks 1 and 3. Connection work must also be done in two places. or,
The number of parts is increased by using the fixing plate 11.

When such blocks 1 and 3 are used in a power circuit which handles a large amount of power from a battery, it is desirable to reduce the number of connection points as much as possible. In addition, since the number of vehicles manufactured is large, the number of parts and the number of working locations are large, which greatly increases the cost.

In consideration of the above circumstances, the present invention reduces the number of connection points and the number of parts, improves the electrical conductivity and reliability of the circuit, and improves the connection workability. The purpose is to provide.

[0010]

According to a first aspect of the present invention, there is provided an electric connection having an internal circuit for branching or relaying electric power or an electric signal to an electric device and a bus bar connected to the internal circuit and protruding to the outside. A connection structure for an electrical connection box for connecting a plurality of boxes, wherein a bus bar for either electrical connection box
Is provided with a fixing portion, and the fixing portion and a bus bar of another electric connection box are fixed and connected by fastening means.

As described above, in the connection structure of the electric junction box according to the first aspect, the fixing portion is integrally formed with the bus bar of the electric junction box, and the fixing portion and the bus bar of another electric junction box are fastened. Connect the electrical junction box by fixing with
Unlike the conventional example, a relay member such as a fixing plate is not used.

In this way, the number of connecting points is reduced from two in the conventional example to one, and the electrical resistance between the electrical junction boxes is lowered to improve the electrical continuity, so that the power consumption of the battery is reduced and the fuel consumption of the engine is reduced. improves.

This power saving effect increases as the electric power handled by the electrical junction box increases.

Further, the reliability of the electrical connection is improved as the number of connecting points is reduced.

Further, since the connecting work is reduced to one place, the workability is improved and the number of parts is reduced by the amount of the relay member, so that the effect of reducing the cost is great.

A second aspect of the present invention is the connection structure for an electric junction box according to the first aspect, wherein the fastening means penetrates through bolt holes provided in the fixing portion and the busbar, and the bolt. It is characterized by comprising a nut that is screwed to and fastens the fixing portion and the busbar, and an effect equivalent to that of the configuration of claim 1 is obtained.

In addition to this, the fastening means using bolts and nuts is inexpensive, has a high fastening function, and is easy to remove.

If the bolts are arranged vertically,
Since the nut can be tightened from above, workability is further improved.

A third aspect of the present invention is the connection structure for an electric connection box according to the second aspect, which has an outer box for housing the electric connection box, and the bolt is provided so as to project from the inside of the outer box. Since it is fixed on a pedestal, the same effect as that of the second aspect can be obtained.

In addition to this, the bolt of the fastening means is fixed on the pedestal of the outer box, and the electric junction box is supported by the outer box by connecting the bus bar with the fastening means.

The invention according to claim 4 is the invention according to claim 1, further comprising an outer box for accommodating the electric connection box, wherein the electric connection box is provided between the inner wall of the outer box and the outer wall of the electric connection box. Supporting means for supporting is provided, and an effect equivalent to that of the first aspect is obtained.

In addition to this, since the electric connection box is supported on the outer box by the supporting means, the vibration of the vehicle is suppressed.
Since it is possible to prevent the connection part from hanging over, it is possible to prevent the contact failure of the connection part and the breakage of the bus bar, and to obtain a normal function for a long time.

The invention of claim 5 is the invention of claims 1 to 4.
5. The invention according to any one of claims 1 to 4, wherein a terminal of a power supply wire is simultaneously connected to a connection portion between the fixing portion and the bus bar, and the configuration according to any one of claims 1 to 4. Get the same effect.

In addition to this, by connecting the terminals of the power supply wire at the time of connecting the fixing portion and the busbar, the connection with the power supply can be performed by one connection work, so that the workability is further improved.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. This embodiment is claim 1,
It has 2, 3, and 4 features. In the following description, members without reference numerals are not shown.

In this embodiment, the junction block 31 (electrical junction box) and the fusible link block 3 are used.
3 (electrical junction box) is connected inside the under cover 35 (outer box).

The blocks 31 and 33 are for branching or relaying electric power and electric signals between on-vehicle electric devices. Covers 37 and 3 of the blocks 31 and 33, respectively.
A large number of hoods 43 for accommodating fuses, relays, etc. on the upper and lower surfaces of 9, and a hood for accommodating the boards of the electronic unit.
A cover 45 is provided, and an internal circuit for connecting these electric parts is housed inside each of the covers 37 and 39. This internal circuit is composed of a bus bar, an electric wire, a printed wiring board, and the like.

As shown in FIG. 1, bus bars 47 and 49 of the internal circuit are projected from the covers 37 and 39 of the blocks 31 and 33 to the outside. The front end portion of the bus bar 49 is a fixed portion 51, and bolt holes 53 and 55 are formed at the front ends of the bus bar 47 and the fixed portion 51. On the other hand, a pedestal 57 is provided at the bottom of the under cover 35, and a bolt 59 (fastening means) having a base portion implanted therein is vertically arranged on the pedestal 57.

Each cover 37, 39 and undercover 35
Support means 6 for supporting each block 31, 33 between
1 is provided in plurality.

As shown in FIGS. 1 and 2, these supporting means 61 include a pair of grooves 63, 63, a stopper portion 65 (FIG. 2) and a convex portion 67 provided on the outer circumferences of the covers 37, 39. ,
It is composed of a pair of convex portions 69, 69 having an L-shaped cross section and a concave portion 71 provided on the inner wall of the under cover 35.

When the blocks 31 and 33 are put into the undercover 35 from the position shown in FIG. 1, the undercover-3 is shown.
5, the convex portions 69, 69 of the groove 5 are the grooves 63, 63 of the covers 37, 39.
The upper ends of the convex portions 69, 69 abut the stopper portion 65, and the convex portion 67 engages with the concave portion 71.

Also, the bolt holes 5 of each bus bar 47, 49.
3, 55 are the blocks 31 and 33 supported by the support means 61 on the undercover 35,
The bolt 59 is provided at a position penetrating the bolt 59. When the nut 73 (fastening means) is screwed onto the bolt 59 penetrating the bolt holes 53, 55, the busbars 47, 49 are provided between the nut 73 and the pedestal 57. Are tightened, connected and fixed.

As described above, since the stopper portion 65 and the convex portion 69 and the convex portion 67 and the concave portion 71 of each supporting means 61 bear the weight of the blocks 31 and 33, the bus bar 47 fixed to the pedestal 57, The burden of 49 is reduced. Also, the convex portion 6
By the engagement between 7 and the concave portion 71, the displacement of the blocks 31 and 33 (vertical movement) when the vehicle is subjected to vibration is prevented, and it is possible to prevent the bus bars 47 and 49 from being subjected to an excessive force.

As described above, in the connection structure of the electric junction box of the first embodiment, the fixing member 51 is provided on the bus bar 49 of the fusible link block 33, so that the relay member as in the conventional example is provided. The blocks 31 and 33 are connected without using them.

Therefore, the number of connection points is one from two in the conventional example.
Since the electric resistance between the blocks 31 and 33 is reduced and the electric conductivity is improved, the power consumption of the battery is reduced and the fuel consumption of the engine is improved.

Further, the reliability of electrical connection is improved as the number of connection points is reduced.

Further, since the connecting work is reduced from two places to one place, the workability is improved, and the number of parts is reduced by the amount of the relay member, and the cost is reduced accordingly.

The fastening means using the bolt 59 and the nut 73 is inexpensive, has a high fastening function, and is easy to remove.

Further, since the bolts 59 are arranged in the vertical direction, the nuts 73 can be tightened from above, further improving workability.

Further, the blocks 31 and 33 are supported by the supporting means 6
By supporting the undercover 35 by 1
Since it is possible to prevent the vibration of the vehicle from being applied to the connecting portions of the bus bars 47 and 49, a contact failure at the connecting points and the bus bar-4 can be prevented.
The breakage of 7 and 49 is prevented, and a normal function can be obtained for a long period of time.

Next, a second embodiment of the present invention will be described with reference to FIGS. This embodiment is described in claims 1, 2, 3,
It has 4 and 5 features. It should be noted that duplicate description of members common to the first embodiment will be omitted.

In this embodiment, as shown in each drawing, when the fixing portion 51 and the bus bar 47 are connected by the bolt 59 and the nut 73, the terminal 77 of the power supply wire 75 from the battery is simultaneously connected.

In this way, since the connection with the power source can be performed by one connection work, the workability is further improved.

In addition to this, the same effect as the first embodiment is obtained.

The power saving effect due to the reduction of the number of connection points to one is particularly great when the blocks 31 and 33 handle a large amount of power from the battery.

In the connection structure of the present invention, three or more electric junction boxes may be connected.

The fixing portion may be provided on any bus bar.

The supporting means in claim 4 may be a bolt.

[0049]

According to the electric junction box connection structure of the first aspect of the present invention, a fixing portion is provided on the bus bar of any one of the electric junction boxes to be connected to connect to another electric junction box. The relay member used in the conventional example is not used.

Therefore, the number of connecting points is one from two in the conventional example.
The electric resistance between the electric junction boxes is reduced by reducing the number of parts, so that the power consumption of the battery is reduced and the fuel efficiency of the engine is improved.

Further, since the connecting work is reduced from two places to one place, the workability is improved and the number of parts is reduced by the amount of the relay member, so that the effect of reducing the cost is great.

According to the invention of claim 2, the same effect as that of the structure of claim 1 is obtained, and the fastening means by the bolt and the nut is inexpensive, has a high fastening function, and is easy to remove.

Further, by arranging the bolts in the vertical direction, the nut can be tightened from above, and the workability is further improved.

According to the invention of claim 3, the same effect as the structure of claim 2 is obtained, and since the bolt of the fastening means is fixed on the pedestal of the outer box, the bus bar is connected by the fastening means. The electrical junction box is supported by the outer box.

According to a fourth aspect of the present invention, the same effect as that of the first aspect is obtained, and the vibration of the vehicle is applied to the connecting portion of the busbar by supporting the electric connection box on the outer box by the supporting means. This prevents the contact failure at the connection point and the breakage of the bus bar, and provides a normal function for a long time.

The invention of claim 5 is the first to fourth aspects of the invention.
In addition to obtaining the same effect as the configuration of 1., by simultaneously connecting the terminals of the power supply wire to the connecting portion between the fixed portion and the busbar, connection with the power source can be performed with one connection work, which further improves workability. improves.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a connection structure for an electric junction box of the present invention.

FIG. 2 is a drawing showing a cross section of a main part of the first embodiment.

FIG. 3 is a perspective view showing a second embodiment of the connection structure of the electric junction box of the present invention.

FIG. 4 is an enlarged view of a main part of the second embodiment.

FIG. 5 is a perspective view of a conventional example.

FIG. 6 is a cross-sectional view showing the main part of the conventional example of FIG.

[Explanation of symbols]

 31 junction block (electrical connection box) 33 fusible link block (electrical connection box) 35 undercover 35 (outer box) 47, 49 busbar 51 fixing part 53, 55 bolt hole 57 pedestal 59 bolt (fastening means) ) 61 support means 73 nut (fastening means) 75 power supply wire 77 terminal

Claims (5)

[Claims] 1. Connection of an electric connection box for connecting a plurality of electric connection boxes each having an internal circuit for branching or relaying electric power or an electric signal to an electric device and a bus bar connected to the internal circuit and protruding to the outside. A structure, wherein a fixing portion is provided on a busbar of one of the electric connection boxes, and the fixing portion and the busbar of another electric connection box are fixed and connected by fastening means. Connection structure. 2. The invention according to claim 1, wherein the fastening means has a bolt penetrating through a bolt hole provided in the fixing portion and the busbar, and the fixing portion and the busbar screwed to the bolt. A connection structure for an electric connection box, which comprises a nut for fastening the. 3. The invention according to claim 2, further comprising an outer box for accommodating the electric connection box, wherein the bolt is fixed on a pedestal protruding from the inside of the outer box. Characteristic electric junction box connection structure. 4. The invention according to claim 1, further comprising an outer box for accommodating the electric connection box, wherein the supporting means supports the electric connection box between the inner wall of the outer box and the outer wall of the electric connection box. A connection structure for an electric junction box, which is provided. 5. The invention according to any one of claims 1 to 4, wherein a terminal of a power supply wire is simultaneously connected to a connection portion between the fixing portion and the bus bar. And the connection structure of the electrical junction box.