JPH1092536A - Bus bar and branch connecting structure using bus bar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a board part within a range of location of tubs in the case where a vertical bus bar is provided with a tub by bending the tub from a board part. SOLUTION: A bus bar 25 is formed of a conductive metal plate to be housed in an electric joint box, and a tub forming part 34 is projected from an upper end of a board part 33 arranged in the vertical direction, and the tub forming part 34 is provided with a first vertical plate part 35 continued upward from an upper end of the board part 33, a first lateral plate part 36 extended in the lateral direction from an upper end of the first vertical plate part 35, a second vertical plate part 37 extended upward from a tip of the lateral plate part, a second lateral plate part 38 extended from an upper end of the second vertical plate part in the lateral direction opposite to the first lateral plate part, plural tubs 26, 27 projected from an upper end of the second lateral part. A tip of the first lateral plate 36 is bent at 90 degree so that the first vertical plate part and the board part are positioned in a lower part within a range of location of the plural tubs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bus bar housed in an electric connection box used for a wire harness for an automobile and a branch connection structure using the bus bar, and more particularly to an integrated fuse, a connector for connecting electric wires, a diode, a short pin, and the like. And a tab protruding from a bus bar via a relay terminal to a tab protruding at a narrow pitch from a component mounted on the electric connection box.

[0002]

2. Description of the Related Art Conventionally, in an electric connection box such as a junction box, a relay box, and a fuse box used for a wire harness for an automobile, as shown in FIGS. ) Tab 1a
3a of the bus bar 3 that accommodates the inside of the electric connection box 2
The tab 1b on the downstream side (load side) of the fuse 1 is connected to the crimp terminal 6 attached to the end of the electric wire 5 connected to the load side.

A tab 3a provided on the bus bar 3 is shown in FIG.
As shown in (A), (B), and (C), a tab forming portion 3c protrudes from the substrate portion 3b, and the horizontal plate portion 3d of the tab forming portion 3c is bent by 90 degrees, so that the end of the horizontal plate portion 3d is bent. The protruding tab 3a is arranged orthogonal to the substrate portion 3b. Therefore, the configuration is such that the substrate portion 3b is located outside one side of the tab 3a.

For this reason, as shown in FIGS. 8A and 8B, the crimp terminal 6 is connected to the tab 1a via the relay terminal 4 rather than the width W1 of the housing chamber 7 of the crimp terminal 6 connected to the tab 1b of the fuse 1. Width W2 of accommodation room 8 of bus bar 3 provided with tab 3a
Need to be large.

[0005]

The above fuse is shown in FIG.
In the integrated fuse 10 as shown in FIG. 6, an electric junction box is formed so that six tabs 21a, 21g and 21c protrude from the case 20 at a narrow pitch and the two central tabs 21a and 21a are connected to the power supply side. Bus bar 1 housed in
In some cases, it is necessary to connect the two tabs 13a and 13b via the relay terminal 9.

In this case, as shown in FIGS. 11A, 11B and 11C, the two tabs 13a and 13b of the bus bar 13 are formed in the same manner as in the case where one tab shown in FIG. 9 is provided. When the portion 13c is bent by 90 degrees, the substrate portion 13d is positioned outside one of the tabs 13a and 13b provided side by side.

In this case, as shown in FIG. 10, the gap between the crimp terminal 6 connected to the tab 21g adjacent to the outside of the tab 21a of the integrated fuse 10 and the board portion 13d of the bus bar 13 becomes narrow. The configuration shown will not be possible. As a result, tabs protruding from the bus bar cannot be connected to tabs protruding at a narrower pitch than the integrated fuse 10, and these tabs 21a, 21a also have to be connected to crimp terminals connected to electric wires. Therefore, it is necessary to join these electric wires. Therefore, it is troublesome and cost increases.

The above problem is not limited to integrated fuses.
The problem also occurs in a diode, a short pin, a connector for electric wire connection, and the like, in which tabs project at a narrow pitch from the case.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has an improved shape of a bus bar so that a board portion of the bus bar does not protrude outward, and a mounting component in which tabs are projected at a narrow pitch. It is an object of the present invention to be able to connect a tab provided on a bus bar to a personal computer.

[0010]

According to the present invention, there is provided a bus bar made of a conductive metal plate housed in an electric connection box, the board being disposed in a vertical direction. A tab forming portion protruding from an upper end of the first vertical plate portion, the tab forming portion continuing upward from an upper end of the substrate portion;
A first horizontal plate extending laterally from an upper end of the first vertical plate, a second vertical plate extending upward from a tip of the horizontal plate, and an upper end of the second vertical plate. A second horizontal plate extending in a direction opposite to the first horizontal plate and a plurality of tabs protruding from an upper end of the second horizontal plate; A first vertical plate portion and a substrate portion are positioned below the installation range of the plurality of tabs provided at the upper end of the second horizontal plate portion by bending the tip of the bus bar by 90 degrees. providing.

With the above structure, the vertically arranged substrate portion can be accommodated in the range of the tabs without protruding outward from the range of the plurality of tabs.

The first vertical plate portion may be bent by 90 degrees, and the substrate portion may be positioned horizontally below the installation range of the plurality of tabs provided at the upper end of the second horizontal plate portion. Item 2). Further, it is preferable that a part of the substrate portion bent in the horizontal direction is punched out upward to provide a reinforcing rib.

According to the structure of the second aspect, since the height can be reduced, the height of the second horizontal plate portion from which the plurality of tabs are projected can be increased to increase the support strength of the tabs. Therefore, at the time of fitting with the fuse, it is possible to suppress the deformation of the tab due to the fitting force. Further, according to the configuration of the third aspect, the supporting strength of the tab can be further increased.

The present invention is directed to claim 4 and claim 1.
A branch connection structure using the bus bar according to any one of claims 3 to 3 is provided. That is, at least four or more tabs protrude from the case and are arranged side by side at a narrow pitch on parts mounted on the electric connection box such as an integrated fuse, a connector for electric wire connection, a diode, and a short pin. Are connected to the bus bar according to any one of claims 1 to 3.

As described above, even if a plurality of tabs protrude from the bus bar, the board does not protrude outward. Therefore, the tab of the bus bar is connected to the tab at the center protruding at a narrow pitch from the mounted components. Becomes possible. Therefore, it is not necessary to connect the crimp terminal connected to the electric wire to the tab at the center of the mounted component, and the number of operations can be reduced.

The bus bar constitutes a power supply side circuit and distributes power to mounted components via a plurality of tabs. Also, the tab at the center of the mounted component is connected to the tab of the bus bar via a relay terminal, and both outer tabs adjacent to the tabs of the mounted component are connected to the crimp terminals connected to the wire terminals. (Claim 6).

As described above, the power supply circuit can be easily distributed by connecting the tab at the center projecting at a narrow pitch to the mounted component with the tab of the bus bar of the power supply circuit. In addition, if the crimp terminals of the wire terminals connected to the load side are arranged on both outer sides, the handling of the wires is improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings.

FIGS. 1 to 4 show a first embodiment, in which an integrated fuse 10 is mounted on a fuse mounting portion 11 provided in a relay block 9 and protrudes from a lower surface of a case 20 of the integrated fuse 10 at a constant pitch P. Of the six tabs, two tabs 26 and 27 of the bus bar 25 accommodating the center two tabs 21a inside the relay block and the relay terminal 2
8 and 29, and crimp terminals 3 in which four tabs 21g and 21h on both outer sides are crimped to the end of the electric wire 30.
1 is connected.

The bus bar 25 is formed by bending a conductive metal plate to have the shape shown in FIGS. 2A and 2B. That is,
In the unfolded shape shown by the one-dot chain line in FIG.
Tab forming portion 3 from the upper end of substrate portion 33 arranged in the vertical direction
4 are protruding. The tab forming portion 34 includes a first vertical plate portion 35 continuing upward from the upper end of the substrate portion 33, a first horizontal plate portion 36 extending laterally from the upper end of the first vertical plate portion 35,
The second vertical plate portion 3 extending upward from the tip of the horizontal plate portion 36
7 and the first horizontal plate portion 36 from the upper end of the second vertical plate portion 37.
A second horizontal plate portion 38 extending laterally in the opposite direction to the second horizontal plate portion 38;
The two tabs 26 and 27 projecting from the upper end of the horizontal plate portion 38
Are provided.

From the developed shape shown by the dashed line in FIG.
The first vertical plate portion 35 and the substrate portion 33 are positioned below the installation range (L) of the two tabs 26 and 27 provided at the upper end of the second horizontal plate portion 38 after being bent.

The two tabs 26 and 27 are orthogonal to the substrate 33, and the range (L) between the tabs 26 and 27 is as follows.
The substrate portion 33 is located just between the tabs 26 and 27 at the center. As shown in FIG.
Are mounted in parallel, a tab forming portion 34 having tabs 26 and 27 projecting from the substrate portion 33 of the bus bar 25 at a predetermined interval is formed orthogonally.

The integrated fuse 10 is shown in FIGS. 4A and 4B.
As shown in (C), a case 20 made of an insulating resin
Accommodates two sets of conductive plates 21 (21A, 21B), each of which has a shape having three comb teeth as shown in the figure, and a power supply connection at the tip of one tooth (a). A side tab 21a is provided, and a bent portion 21c is provided at a right angle from the tip of the extending portion 21b. Two teeth (b) and (c) are branched from the bent portion 21c.
Load connection side tabs 21g, 21h at the ends of d, 21f, respectively.
And a narrow fusing portion 2 in the middle of the branch portion.
1i and 21k are provided.

The six tabs 21a, 21g, 21h project at a constant pitch P narrower than the lower surface of the case 20, and the two sets of conductors housed in the case 20 are the power connection side tabs 21a, 21a. Are arranged adjacent to the center, and project on both sides thereof so that the load connection side tabs 21g and 21h are arranged.

Bus bar 2 housed in relay block 11
Reference numeral 5 is connected to the power supply side. When the integrated fuse 10 is mounted on the relay block 11, as shown in FIGS. The relay terminals 28 and 29 are inserted into the tabs 26 and 27 of the bus bar 25 respectively.
At that time, the board portion 33 of the bus bar 25 is located just in the middle of the tabs 26 and 27 and fits in the bus bar accommodating room 11b formed continuously with the same width as the tab accommodating room 11a.

Further, the tab housing chamber 1 of the fuse mounting portion 11
Two crimp terminal receiving chambers 11c are formed on both sides of 1a, and a female crimp terminal 31 crimped to the tip of the electric wire 30 is inserted.

When the integrated fuse 10 is inserted into the upper fitting portion 11d of the fuse mounting portion 11, and the tabs 21a, 21a are respectively inserted into the tab accommodating chambers 11a, they are fitted and connected to the relay terminals 28, 29, and the power supply circuit is formed. Tab 26 of the bus bar 25,
27 are electrically connected to each other. The tabs 21g and 21h inserted into the crimp terminal housing chamber 11c are electrically connected to the crimp terminals 31, respectively.

As described above, since the shape of the bus bar 25 is improved and the substrate portion 33 is contained within the range (L) of the tabs 26 and 27, the bus bar 25 is connected to the integrated fuse 10 having tabs projecting at a narrow pitch. be able to.

The shape of the bus bar 25 is not limited to the shape of the first embodiment, but may be the shape of the second embodiment shown in FIGS. In the bus bar 25 ', the first horizontal plate portion 36' is extended in the opposite direction to the first embodiment, and the second vertical plate portion 37 'is projected from the tip of the first horizontal plate portion 36'. The second horizontal plate portion 3 is provided on both sides from the upper end of the second vertical plate portion 37 '.
8 ′ is projected, and two tabs 26 ′ and 27 ′ are projected from the upper surface of the second horizontal plate portion 38 ′ so as to sandwich the second vertical plate portion 37 ′. Also in the second embodiment, the first horizontal plate portion 36 'is bent 90 degrees to have a shape shown in FIG. 5A.

With the above configuration, the central portion of the second horizontal plate portion 38 'from which the tabs 26' and 27 'protrude is the second vertical plate component 3
The tabs 26 'and 27' can be stably supported since they are supported at 7 ', so to speak, they are not cantilevered. Also, the substrate portion 33 'is in the range (L) between the tabs 26' and 27 '.
It is housed inside and does not protrude outward.

FIGS. 6A and 6B show a bus bar 25 "of the third embodiment, and as shown by a two-dot chain line in FIG. 6B, the developed shape is the same as that of the second embodiment. After the first horizontal plate portion 36 'is bent at 90 degrees, the first vertical plate portion 35' is bent at 90 degrees as shown on the right side of FIG. Further, the horizontally bent substrate portion 33 'is provided with a reinforcing rib 39 which is previously punched out and projected upward.

As described above, when the substrate 33 'is horizontal,
The height of the substrate portion 33 'can be reduced by the amount of bending. Therefore, the thickness (height) of the second vertical plate portion 37 ′ can be increased by the reduced amount to increase the strength, and the strength can be further increased by the reinforcing rib 39.

In the first embodiment, the integrated fuse is connected to the bus bar in the relay block. However, even when the short pin 40 shown in FIG. 7 is mounted on an electric connection box such as a relay block instead of the integrated fuse. Similarly, when connecting to the bus bar of the same power supply circuit, the first to third
By using the bus bar of the embodiment, connection becomes possible. In addition to integrated fuses and short pins,
The present invention can also be applied to a case in which a tab is similarly projected from a connector for connecting electric wires or a diode, and power is distributed and connected from a bus bar housed in an electric connection box.

[0034]

As is apparent from the above description, according to the present invention, a plurality of tabs at the center of the tabs protruding in parallel at a narrower pitch than the case of the mounted component are accommodated in the electric connection box. When connecting to the tab provided on the bus bar, the shape of the bus bar is improved so that the board portion does not protrude from the installation area of the tab, so that connection is possible. Therefore, the power supply circuits can be distributed by connecting the tabs arranged side by side at a narrow pitch of the mounted components to the bus bars arranged in the electric connection box.

As a result, it is no longer necessary to use a wire crimping terminal instead of a bus bar as in the prior art, and it is not necessary to reduce the number of wires with crimping terminals and to join these wires, thereby reducing the number of parts and labor. And cost reduction can be achieved.

[Brief description of the drawings]

1A and 1B show a first embodiment of the present invention, wherein FIG. 1A is an exploded view, and FIG. 1B is a bottom view of a fuse mounting portion.

FIGS. 2A and 2B show a bus bar according to the first embodiment, wherein FIG. 2A is a front view, FIG. 2B is a plan view, and FIG.

FIG. 3 is a schematic diagram showing a positional relationship between the bus bar and an integrated fuse.

FIG. 4 shows an integrated fuse, (A) is a plan view,
(B) is a front view, and (C) is a front view excluding a front side portion.

FIGS. 5A and 5B show a bus bar according to a second embodiment, wherein FIG. 5A is a front view and FIG.

FIGS. 6A and 6B show a bus bar according to a third embodiment, wherein FIG. 6A is a front view and FIG.

FIG. 7 is a perspective view of a short pin.

8A is a cross-sectional view showing a conventional example, and FIG. 8B is a schematic view showing an arrangement state.

9 (A) is a plan view, FIG. 9 (B) is a front view, and FIG. 9 (C) is a drawing showing a bus bar forming mode.

FIG. 10 is a view showing a problem when the integrated fuse is mounted.

FIGS. 11A and 11B show the conventional bus bar of FIG. 10, wherein FIG. 11A is a plan view, FIG. 11B is a front view, and FIG.

[Explanation of symbols]

 Reference Signs 9 relay block 10 integrated fuse 12 fuse mounting portion 21a, 21g, 21h tab 25 bus bar 26, 27 tab 28, 29 relay terminal 33 substrate portion 34 tab forming portion 35 first vertical plate portion 36 first horizontal plate portion 37 second vertical Plate part 38 Second horizontal plate part 30 Electric wire 31 Crimp terminal

Claims (6)

[Claims] 1. A bus bar made of a conductive metal plate accommodated in an electric junction box, wherein a tab forming portion projects from an upper end of a vertically arranged substrate portion, and the tab forming portion is located at a position higher than an upper end of the substrate portion. An upwardly continuous first vertical plate portion, a first horizontal plate portion extending laterally from an upper end of the first vertical plate portion, and a second vertical plate portion extending upward from a tip of the horizontal plate portion A second horizontal plate extending in a direction opposite to the first horizontal plate from an upper end of the second vertical plate, and a plurality of tabs protruding from an upper end of the second horizontal plate. The first vertical plate portion and the substrate portion are positioned below the installation range of the plurality of tabs provided at the upper end of the second horizontal plate portion by bending the tip of the first horizontal plate portion by 90 degrees. A bus bar, characterized in that the bus bar has a configuration to allow the bus bar. 2. The apparatus according to claim 1, wherein the first vertical plate portion is bent by 90 degrees, and the substrate portion is positioned horizontally below the installation range of the plurality of tabs provided at the upper end of the second horizontal plate portion. Item 2. The busbar according to item 1. 3. A reinforcing rib is provided by punching a part of the substrate portion bent in the horizontal direction upward.
The bus bar as described in. 4. At least four or more tabs are protruded from a case to parts mounted on an electric connection box, such as an integrated fuse, a connector for electric wire connection, a diode, a short pin, and the like, and are arranged side by side at a narrow pitch. A branch connection structure using a bus bar, wherein the plurality of tabs of the portion are connected to the bus bar according to any one of claims 1 to 3. 5. The branch connection structure using a bus bar according to claim 4, wherein the bus bar constitutes a power supply side circuit, and the power is distributed to a mounted component via a plurality of tabs. 6. A tab at a central portion of the mounted component is connected to a tab of the bus bar via a relay terminal, and tabs on both outer sides adjacent to the tabs of the mounted component are crimp terminals connected to electric wire terminals. A branch connection structure using the bus bar according to claim 4 or 5, wherein the branch connection structure is connected to the bus bar.