JP3412806B2 - Fixing structure of electrical junction box - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for fixing an electric connection box that branches or relays electric power or electric signals between electric devices.

[0002]

2. Description of the Related Art Conventionally, as an electric junction box, there is a fixing structure as shown in FIG. As shown in the figure, this is a junction block (J / B: branch junction box) 1 and a fusible link block (FL / B: branch junction box) 2.
And are fixed in a state of being connected inside the under cover 3. Each of the blocks 1 and 2 is, for example, for branching an electric wire between in-vehicle electric devices, and has a relay, a fuse, an internal circuit connecting these, and the like. This internal circuit is composed of a bus bar of a conductive metal plate, an electric wire, a printed wiring board, and the like. In the figure, reference numeral 4 indicates a bus bar protruding outward from the junction block 1.

As shown in FIG. 4, in this fixing structure of the electric junction box, when the junction block 1 is attached to one undercover 3, the engaging portions 1A formed on the three outer wall surfaces of the junction block 1 are undercut. The three guide rails 5 provided on the inner wall of the cover 3 are respectively fitted and inserted to hold the junction block 1, and the bus bar 4 is attached to the stud bolt 6 installed on the under cover 3. The bus bar 4 is formed with an insertion port 4A for the stud bolt 6.

[0004]

However, when the side wall of the undercover 3 is tilted or bent and deformed into an inclined state, it is necessary to assemble the junction block 1 to the guide rail 5 as shown in FIG. There was a problem that it could not be done smoothly. In particular, the undercover 3 made of an electrically insulating synthetic resin is easily deformed when a load such as a load is applied, and thus such a problem is likely to occur.

Even if the junction block 1 can be assembled to the guide rail 5, the inclination of the side wall of the undercover 3 causes the center of the insertion port 4A of the bus bar 4 and the center of the stud bolt 6 to be aligned as shown in FIG. There is a case where the stud bolt 6 becomes difficult to insert into the insertion port 4A of the bus bar 4 and the assembling work becomes difficult.

In consideration of the above circumstances, the present invention makes it easy to assemble an electric connection box to a case where the side wall is inclined, and moreover, by assembling the electric connection box, the electric connection can correct the inclination of the case. It is intended to provide a fixed structure for a box.

[0007]

The invention according to claim 1 is
Inside the to case, sequentially out of the housing have been electrical connection box, a second electrical connection box of the outer surface which is then accommodated with the outer surface of the first electrical connection box housed above and adjacent to each other Between the two, there is provided a first guide part for guiding the second electric connection box in the vertical direction and for changing / adjusting the distance between the first electric connection box and the second electric connection box. Guiding the second electric connection box in a vertical direction between an outer side surface of the second electric connection box opposite to the outer side surface and an inner side surface of the case, and the second electric connection box and the second electric connection box. A second guide portion that defines a distance from the inner surface of the case is provided, the second electric connection box side is held on the case side, and the first guide is provided.
A part of the first electrical connection box and the second electrical connection box
A rail for engagement provided on one side along the vertical direction
And the engaging rail provided on the other side in the vertical direction.
Guide rail that fits with the cable
In the fixed structure, the second guide portion is connected to the second electrical contact.
One of the inner surface of the connecting box
The engaging rail provided on the other side and the other along the vertical direction
Guide rail that fits with the engaging rail provided
And an engaging rail that constitutes the second guide portion.
The guide rail and the guide rail to form the first guide portion.
Is characterized in Rukoto was tightly fitted than if rail and the guide rail.

Therefore, according to the first aspect of the present invention, the first guide portion can change the relative distance between the first electric connection box and the second electric connection box, so that the side wall of the case having the second guide portion is provided. Even if there is deformation such as falling or tilting,
By moving the second electric connection box in the guide portion, the side wall of the case can be corrected, and the second electric connection box can be stored and fixed at an appropriate position in the case. Special
The engaging rail and the guide rail that form the second guide portion.
And the engaging rail and the guide that form the first guide portion.
By fitting it more tightly than the rail, it can be connected to the second electrical junction box.
The distance from the case can be kept constant.

[0009]

[0010]

[0011]

[0012]

[0013] According to a second aspect of the invention, a fixing structure of the electric connection box according to claim 1, wherein the upper end of the first guide portion provided in the first electrical connection box, the opening surface of the case It is characterized by being located above.

Therefore, in the invention described in claim 2 ,
In addition to the effect of the invention described in 1 , the upper end of the first guide portion is located above the opening surface of the case, so that the first guide portion is first stored.
It becomes easy to assemble the second electric connection box to the electric connection box. By determining the position of the second electric connection box with respect to the first electric connection box, the positioning of the second electric connection box and the case becomes easy.

[0015]

[0016]

[0017]

[0018]

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the fixing structure for an electric junction box according to the present invention will be described below with reference to the embodiments shown in FIGS.

In this embodiment, the junction block (second electric connection box) 11 and the fusible link block (first electric connection box) 12 are undercased (outer box).
Connect inside 13.

Each of the blocks 11 and 12 is for branching or relaying electric power and electric power signals between on-vehicle electric devices. The cover 11A of the junction block 11 has an upper surface and a lower surface provided with a plurality of electric component mounting portions 15 for accommodating electronic components such as relays and a hood portion 16 for accommodating a board of the electronic unit. Contains an internal circuit that connects these electrical components. The internal circuit is composed of an electric wire and a printed wiring board (both not shown), a bus bar 14 protruding laterally from the junction block 11, and the like. A bolt hole 14A is formed in the protruding portion of the bus bar 14.

Engaging rails 19 are formed on the four outer wall surfaces of the junction block 11 along the vertical direction. The respective engagement rails 19 form two right angles with the outer wall surface of the junction block 11 and are formed in parallel with each other in the vertical direction, and two projecting plate portions 19A and the outer ends of each projecting plate portion 19A. And a parallel plate portion 19B that is parallel to the outer wall surface. The parallel plate portions 19B formed on the two projecting plate portions 19A of the engaging rail 19 are the projecting plate portions 1 on the other side.
It extends toward the direction away from the parallel plate portion 19B formed on 9A. Furthermore, junction block 1
An engaged portion 19C is formed on the engaging rail 19 provided on the inner wall surface of the under case 13 of FIG.

On the other hand, the fusible link block 12
Includes a fuse and the like, and is provided with a connection portion (not shown) connected to the junction block 11 side. On one outer wall surface of the fusible link block 12 (a surface adjacent to the junction block 11 when housed in the under case 13), one of the engagement rails 1 of the junction block 11 described above is provided.
A guide rail 20 is formed to guide 9 up and down. The guide rail 20 is composed of two rails 21 and 22 that are parallel to each other. These rails 21, 22
Has projecting plate portions 21A and 22A projecting from the outer wall surface of the fusible link block 12 in a direction forming a right angle. The two parallel plate portions 19B and 19B of the engagement rail 19 described above are inserted between the protruding plate portions 21A and 22A. Then, the respective projecting plate portions 21A, 2
From the outer end portion of 2A, separation preventing plate portions 21B and 22B that are parallel to the outer wall surface of the fusible link block 12 extend in a direction toward each other. That is,
The separation prevention plate portions 21B and 22B are dimensioned so that the engagement rail 19 does not come off in the direction away from the fusible link block 12 with the engagement rail 19 inserted and fitted. In addition, the separation prevention plate portions 21B and 22B
The distance between them is set so that the above-mentioned protruding plate portions 19A, 19A of the engaging rail 19 can be accommodated.

As shown in FIGS. 1 and 2, the upper end portion of the fusible link block 12 is housed in the under case 13 and the upper end surface (A
The upper end portion of the guide rail 20 formed on the fusible link block 12 is also set above the upper end surface of the under case 13.

The under case 13 is a box-shaped body having a substantially rectangular parallelepiped shape capable of accommodating the junction block 11 and the fusible link block 12 adjacent to each other, and is made of an electrically insulating synthetic resin. At the bottom of the under case 13, a pedestal 17 having a predetermined height is provided upright along one inner surface of the side wall. On the upper surface of this pedestal 17, a stud bolt 18 in which a base is implanted is erected vertically. And this stud bolt 18
With the bolt hole 14A of the bus bar 14 on the side of the junction block 11 fitted, the junction block 11 is positioned with respect to the under case 13.

Further, on the inner wall surface of the under case 13 which surrounds the space in which the junction block 11 is housed, the cover side guides for inserting and guiding the engaging rails 19 provided at the corresponding positions of the junction block 11 are provided. The rail 23 is formed. These cover-side guide rails 23 have substantially the same shape as the guide rails 20 provided on the fusible link block 12, and the parallel plate portion 23B extends parallel to the inner wall surface of the under case 13 from the end of the protruding plate portion 23A. It is shaped like an eggplant. In addition, in the space between the cover-side guide rails 23 provided on the under case 13, the above-mentioned engagement rail 1 is provided.
Locking portion 23C that locks with the engaged portion 19C provided in 9
Is provided, and the junction block 11 housed in the under case 13 can be locked so as not to come off.

Further, in this embodiment, the following settings are made in addition to the above-mentioned configuration. That is, as shown in FIG. 2, the junction block 1
1, the fusible link block 1 includes the engaging rail 19 provided on the outer wall surface on the side facing the fusible link block 12 and the other engaging rails 19.
The protruding length of the protruding plate portion 19A provided on the outer wall surface on the side opposite to 2, that is, the distance X between the outer wall surface and the parallel plate portion 19B is greater than the distance x between the other outer wall surface and the parallel plate portion 19B. It is set long. Moreover, that put the guide rail 20 provided on the outer wall surface opposed to the junction block 11 of the fusible link block 12 away leaving prevention plate portion 22
The distance Y between B and the outer wall surface is set to be longer than the distance y between the parallel plate portion 23B of the guide rail 23 provided on the inner wall surface of the under case 13 and the inner wall surface. As a result of the setting in this way, when the corresponding engaging rail 19 is fitted to the guide rail 20 of the fusible link block 12 as shown in FIG. 3, the movement in the direction indicated by the symbol a in the figure is prevented. There is freedom. On the other hand, when the corresponding engagement rails 19 are fitted to the guide rails 23 provided on the under case 13, they are relatively tightly fitted together because the distance between the parallel plate portion and the wall surface is set small. As a result, the engagement of the engaged portion 19C of the engagement rail 19 is not easily disengaged from the engagement portion 23C of the cover side guide rail 23.

The structure of the fixing structure for the electrical junction box according to this embodiment has been described above. Next, the operation and operation of storing and fixing the junction block 11 and the fusible link block 12 in the under case 13 will be described. .

First, to the predetermined position of the under case 13,
The fusible link block 12 is stored and arranged. At this time, since the junction block 11 is not yet housed in the under case 13, the fusible link block 12 can be easily housed. Subsequently, the lower end of the engaging rail 19 corresponding to the guide rail 20 on the fusible link block 12 side of the junction block 11 is inserted into the upper end of the guide rail 20 on the fusible link block 12 side. At this time, as shown in FIG. 2, since the upper end of the guide rail 20 is located above the upper end surface (A surface) of the under case 13, the junction block 11 is not yet inside the under case 13, Positioning with the bull link block 12 can be freely performed.

Here, the fusible link block 12
Since the guide rail 20 and the engaging rail 19 of the junction block 11 are movable in a predetermined distance range in the direction a of FIG. 3, the lower end of the other engaging rail 19 of the junction block 11 and the under case 13 side. It is possible to easily fit with the upper end of the guide rail 23 while adjusting the alignment. Also, in this way, the fusible link block 12 and the junction block 1 are
Since the relative movement with respect to 1 is slightly possible, for example, even when the side wall of the undercase 13 is deformed and inclined, particularly, the side wall opposite to the side where the fusible link block 12 is accommodated is deformed. The engaging rail 19 of the junction block 11 and the guide rail 23 of the under case 13 can be fitted together.

Next, as shown in FIG. 3, with the junction block 11 completely housed in the under case 13, the center of the bolt hole 14A of the bus bar 14 on the side of the junction block 11 and the center of the stud bolt 18 are displaced. When it is in the open position, there is a margin of clearance between the fusible link block 12 and the junction block 11. Therefore, while correcting the distortion (inclination) of the side wall of the undercase 13, the center of the bolt hole 14A and the stud bolt can be corrected. Fine adjustment can be added so that the position of the center of 18 coincides. Like this, undercase 1
Since it is possible to correct the distortion of the side wall of No. 3, when the under case 13 is used again (when the electric connection box is reassembled by removing the electric parts by replacing the electric parts, or the under case 13 is reused), The electric junction box can be easily assembled and fixed.

Although the embodiment has been described above, the present invention is not limited to this, and various modifications accompanying the gist of the configuration can be made. For example, in this embodiment, the junction block 11 and the fusible link block 12 are used as the electrical junction box in the under case 1.
Although the present invention is applied to the case where the electric connection box is accommodated in the third embodiment, it goes without saying that the present invention can be applied to other types of electric junction boxes. Further, in this embodiment, the present invention is applied to fixing two electric junction boxes, but the present invention can also be applied to fixing three or more electric junction boxes. Further, in the above-described embodiment, the guide / engagement of the electric junction box is performed by the engagement rail and the guide rail, but other guide / engagement means can be applied.

Further, in the above-described embodiment, the three guide rails 23 are provided in the under case 13, but the guide rail 23 may be provided on at least one inner wall surface facing the guide rails of the fusible link block 12. . Furthermore, a configuration may be adopted in which a fitting space between the guide rails 23 provided on the inner wall surfaces on both sides of the inner wall surface and the engagement rails 19 on the side of the junction block 11 has a margin.

[0034]

As described above, according to the first aspect of the invention, even if the case side wall is collapsed, the case side wall can be corrected by correcting the case side wall and the like. It has the effect that it can be guided and fixed to. Again, when the second electric connection box is stored in the case, the deformation of the case has been corrected, so that there is an effect of facilitating the storage operation of the second electric connection box. In particular, the second electrical junction box and the cable
It becomes easy to engage the second electric junction box with the case.
It can be easily guided and held inward.

[0035]

[0036]

[0037] According to the second aspect of the invention, in addition to the effect of the invention of claim 1, there is an effect that can be easily assembled second electrical connection box to the first electrical connection box is housed above .

[0038]

[0039]

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a fixing structure for an electrical junction box according to an embodiment of the present invention.

FIG. 2 is a fragmentary explanatory view showing a state in which a junction block is housed in an under case according to the present embodiment.

FIG. 3 is a fragmentary side view showing the fixing structure of the electrical junction box of the present embodiment.

FIG. 4 is an exploded perspective view showing a conventional fixing structure for an electrical junction box.

FIG. 5 is an explanatory view showing an operation of storing a conventional electric junction box in a case.

FIG. 6 is a fragmentary side view showing a fixing structure of a conventional electric junction box.

[Explanation of symbols]

11 Junction block (2nd electrical junction box) 12 Fusible link block (1st electrical junction box) 13 Under Case (Case) 14 Busbar 14A bolt hole 19 Engagement rail 20 Guide rail 23 Guide rail

Claims (2)

(57) [Claims] Inside of claim 1] to case, among the sequentially accommodated the electrical connection box adjacent to each other, the second electrical connection is then accommodated with the outer surface of the first electrical connection box which is accommodated in the previously A first guide for vertically guiding the second electric junction box between the outer surface of the box and a change / adjustment of the distance between the first electric junction box and the second electric junction box. A guide portion is provided to guide the second electric connection box in a vertical direction between an outer side surface of the second electric connection box opposite to the outer side surface and an inner side surface of the case. A second guide portion that defines a distance between the electric connection box and the inner surface of the case is provided, and the second electric connection box side is held by the case side ;
The first guide portion includes the first electrical junction box and the second electrical connection box.
One of the electrical junction boxes was installed along the vertical direction
Engagement rail and front provided on the other side along the vertical direction
A guide rail that engages with the engagement rail,
In the fixed structure of the air junction box, the second guide portion is
One of the second electrical junction box and the inner surface of the case
Engaging rails provided along the vertical direction, and
A gas that fits with the engaging rail provided along the downward direction.
And a second rail, which constitutes the second guide portion.
The engaging rail and the guide rail, the first guide portion
Closer fit than the engaging rails and guide rails
Fixing structure of the electric connection box, characterized in Rukoto allowed. 2. The first electrical connection box provided with the first electrical connection box
1 The upper end of the guide is located above the opening surface of the case.
Fixing structure of the electrical junction box of claim 1, wherein to Rukoto.