JP2971746B2 - Stacked structure of busbar wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated structure of bus bar wiring boards housed in an electric junction box or the like.

[0002]

2. Description of the Related Art FIG. 8 is an exploded view of a well-known electric junction box. The electric connection box 1 includes a lower case 2, an upper case 3, and a bus bar wiring board 5 housed therein.
And the upper insulating plate 7.

The bus bar wiring board 5 comprises an insulating substrate 9 and a bus bar 11 disposed on the surface thereof.
The upper insulating plate 7 is stacked on the inner bottom surface. Then, cover the upper case 3 and
The upper insulating plate 7 presses the upper surface of the bus bar wiring board 5 by locking the third and third locks. At this time, the tab of the bus bar 9 is inserted into the connector housing on the upper insulating plate 7 to become a connector terminal.

When a bus bar wiring board is formed, conventionally, as shown in FIG. 9, a rib 22 is formed on a surface of an insulating substrate 20 along a predetermined pattern, and a recess 24 formed by the rib 22 is formed. The bus bar 26 formed in a predetermined pattern is accommodated therein (for example, see Japanese Utility Model Laid-Open No. 64-46).
969). Further, the height of the rib 22 is set to be equal to or greater than the thickness of the bus bar 26, and the upper insulating plate 28 is
By intimately adhering to the tip of 2, the intrusion of water into the recess 24 is prevented.

In some cases, a plurality of busbar wiring boards are stacked. FIG. 10 shows an example disclosed in Japanese Utility Model Application Laid-Open No. 63-63022. In the figure, reference numerals 30A, 30B, and 30C denote bus bar wiring boards, respectively. Bus bar wiring board 30
A, 30B, and 30C are provided with a rib 34 protruding from an insulating substrate 32, and a bus bar 3 formed in a recess 36 formed by the rib 34.
8 and are sequentially stacked. in this case,
On the back surface of the insulating substrate 32 of the upper bus bar wiring boards 30B and 30C facing the recess 36 when they are stacked, a protrusion 40 that fits into the recess 36 is formed, and the protrusion 40 is fitted into the recess 36. ing.

FIG. 11 shows a state in which the ribs 22 are formed higher (a), and after the bus bars 26 are provided, the jig 2 is formed.
9, the tip of the rib 22 is melted (b), and the bus bar 26 is melted.
Is shown.

[0007]

However, FIG.
In the laminated structure of the bus bar wiring board shown in FIG. 10, since the bus bar is merely accommodated in the recess formed with a margin in dimension, the bus bar may be loose. Also, since the upper insulating plate is merely brought into contact with the tip of the rib, it is difficult to maintain a high degree of adhesion between the tip of the rib and the upper insulating plate, and it is not possible to maintain a highly reliable seal. Was. Also, in the case of the bus bar wiring board shown in FIG. 11, when an insulating plate was put on the upper layer, the same high sealing property could not be expected.

The present invention has been made in view of the above circumstances, and provides a laminated structure of a bus bar wiring board which can prevent rattle of a bus bar and improve sealing performance.

[0009]

According to a first aspect of the present invention, a recess is formed by projecting a rib on a surface of an insulating substrate along a predetermined pattern, and the predetermined pattern is formed in the recess. A busbar wiring board is formed by arranging the busbars thus formed, and an elastic material layer is formed on the back surface of the insulating plate in the stacked structure of the busbar wiring board obtained by further laminating an insulating board on the busbar wiring board. The elastic material layer is pressed against the ends of the bus bar and the rib.

According to a second aspect of the present invention, in the laminated structure of the bus bar wiring board according to the first aspect, the height of the rib is larger than the thickness of the bus bar.

According to a third aspect of the present invention, a recess is formed by projecting a rib along a predetermined pattern on the surface of the insulating substrate, and a bus bar formed in the predetermined pattern is disposed in the recess. Forming a bus bar wiring board, and forming a rib of an elastic material so as to be higher than the bus bar in a laminated structure of a bus bar wiring board obtained by further laminating an insulating plate on the bus bar wiring board; Is pressed against the tip of the rib to crush the rib.

According to a fourth aspect of the present invention, there is provided the laminated structure of the bus bar wiring board according to the third aspect, wherein the rib has a head portion having a width larger than a root at a tip thereof, and the ribs on both sides constituting the recess. The distance between the heads of the ribs is set smaller than the width of the bus bar.

According to a fifth aspect of the present invention, there is provided the laminated structure of the bus bar wiring board according to the fourth aspect, wherein a cross-sectional shape of the head of the rib is formed in a rhombus shape with two vertexes directed sideways. It is characterized by the following.

According to a sixth aspect of the present invention, in the laminated structure of the bus bar wiring board according to any one of the first to fifth aspects, the elastic material is made of an elastomer.

[0015]

According to the first aspect of the present invention, the elastic material layer and the rib are securely brought into close contact with each other by pressing the elastic material layer against the tip of the rib. In addition, the elastic material layer comes into contact with the bus bar by crushing the elastic material layer.

According to the second aspect of the present invention, the rib is higher than the bus bar, and the elastic material layer comes into contact with the tip of the rib. Therefore, the rib and the elastic material layer are completely adhered to each other, and the watertightness of the recess is increased.

According to the third aspect of the present invention, the rib is brought into close contact with the insulating plate with the rib crushed. Also, as the ribs are crushed,
Hit the bus bar and hold it down.

According to the fourth aspect of the present invention, when the bus bar is inserted into the recess between the ribs, the interval between the heads of the rib is smaller than the width of the bus bar, so that the bus bar can be locked.

According to the fifth aspect of the present invention, since the head of the rib has a rhombic cross section, when the rib is crushed, the degree of adhesion to the insulating plate increases, and the rib comes into contact with the bus bar so as to cover the edge of the bus bar. .

According to the sixth aspect of the present invention, since the elastic material made of the elastomer is used, a large elastic deformation occurs when the insulating plate is pressed against the rib.

[0021]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a laminated structure of the bus bar wiring board of the first embodiment. In FIG. 1A, reference numeral 51 denotes a bus bar wiring board, and reference numeral 52 denotes a bus bar wiring board laminated thereon. The bus bar wiring board 51 has ribs 56 projecting from the surface of an insulating substrate 54 along a predetermined pattern, and bus bars 60 are provided in recesses 58 formed by the ribs 56. The height of the rib 56 is larger than the thickness of the bus bar 60. The upper bus bar wiring board 52 is formed by forming an elastomer (elastic material) layer 65 on the back surface (lower surface) of the insulating substrate 54 and is formed by double molding. Here, no bus bar is provided on the upper bus bar wiring board 52. Therefore, it consists only of the insulating substrate (insulating plate) 54 and the elastomer layer 65.

As the elastomer, for example, the following are suitable.

-Room temperature curing type liquid silicone rubber (RTV): One-component condensation type RTV silicone rubber Two-component condensation type RTV silicone rubber Two-component addition type RTV silicone rubber-Heat curing type liquid silicone rubber (LTV): No adhesion Heat-curable liquid silicone rubber Self-adhesive heat-curable liquid silicon rubber Heat-curable liquid silicon rubber for molding ・ Ultraviolet curable liquid silicon rubber Next, when constructing the electrical junction box, as shown in (b), The bus bar wiring board 51 is accommodated inside the cover 72, and the upper bus bar wiring board 52 is laminated thereon. Then, the upper cover 74 is put on the upper cover 74.
Is locked to the lower cover 72, thereby pressing the upper bus bar wiring board 52 against the upper surface of the lower bus bar wiring board 51.

By doing so, the elastomer layer 65 of the upper bus bar wiring board 52 is pressed against the tip of the rib 56 of the lower bus bar wiring board 51, and the elastomer layer 65 and the rib 56 are securely brought into close contact with each other. Further, when the elastomer layer 65 is crushed, the elastomer layer 65 also adheres to the bus bar 60. Therefore, the recess 58 that accommodates the bus bar 60
Is completely shielded, busbars 60 are insulated from each other,
Waterproofness is surely ensured. At the same time, rattling of the bus bar 60 is prevented.

Incidentally, as in the second embodiment shown in FIG. 2, bus bar wiring boards 51 and 52 in which bus bars 60 are actually accommodated.
May be stacked in multiple layers. In this case, an insulating plate 67 is provided on the upper bus bar wiring board 52. An elastomer layer 65 is formed on the lower surface of both the upper bus bar wiring board 52 and the insulating plate 67 thereon. In this case, the same effect as that of the first embodiment can be obtained by the presence of the elastomer layer 65.

Next, a third embodiment of the present invention will be described.

FIG. 3 shows a bus bar wiring board 75 used in the third embodiment. This bus bar wiring board 75 is provided on an insulating substrate 78.
A rib 80 made of an elastomer protrudes from the upper surface of the groove 80, and a bus bar 92 is provided in a recess 90 formed by the rib 80.

FIG. 4 is a sectional view of a main part, and FIG. 5 is a perspective view of a main part. The rib 80 protruding from the surface of the insulating substrate 78 is formed of an elastomer, and is formed to be higher than the bus bar 92. At the tip of the rib 80, a head portion 82 having a width larger than the root is formed, and the interval H1 between the head portions 82, 82 of the ribs 80, 80 on both sides constituting the recess 90 is formed.
Is set smaller than the width H2 of the bus bar 92. The head 82 protrudes above the bus bar 92, and has a rhombic cross-sectional shape with two vertexes directed sideways. Then, on the bus bar wiring board 75, FIG.
As shown in (a), the insulating plate 95 is overlapped, the insulating plate 95 is pressed against the tip of the rib 80, and the rib 80 is crushed to form a laminated structure.

Next, when an electric junction box is constructed, FIG.
As shown in (a), a busbar wiring board 75 having the above-mentioned elastomeric rib 80 inside the lower cover 72 is provided.
And an insulating plate 95 is laminated thereon. Then, the upper cover 74 is put thereon, and the upper cover 74 is locked to the lower cover 72, so that the insulating plate 95
Is pressed against the upper surface of the bus bar wiring board 75.

By doing so, the insulating plate 9 placed on the
5 crushes the rib 80 of the lower bus bar wiring board 75, and the crushed rib 80 comes into close contact with the insulating plate 95. The rib 80
Is crushed to hit the edge of the bus bar 92,
Press the bus bar 92. Therefore, the adhesion between the rib 80 and the insulating plate 95 increases, and the waterproof performance increases. Further, since the rib 80 presses the bus bar 92, the rattle of the bus bar 92 is suppressed. At this time, since the rib 80 is elastically deformed, the pitch deviation of the bus bar 92 and the like are absorbed. Note that the interval H1 between the heads 82 of the ribs 80 is
Since the bus bar 92 is once inserted into the concave portion 90 between the ribs 80, 80, the bus bar 92 is locked and hardly comes off. Therefore, the assembling work becomes easy. In addition, since the head 82 of the rib 80 has a rhombic cross section, when crushed, the degree of adhesion with the insulating plate 95 increases, and the rib 82 hits the bus bar 92 so as to achieve a large adhesion effect.

As in the fourth embodiment shown in FIG. 7, a plurality of busbar wiring boards 75 may be stacked.

In the above embodiment, an elastomer which can be expected to undergo large elastic deformation is used as the elastic material.
Other elastic materials may be used.

[0034]

As described above, according to the first aspect of the present invention, since the elastic material layer is in close contact with the rib and the bus bar,
Water resistance can be reliably ensured, and rattling of the bus bar can be prevented.

According to the second aspect of the present invention, the watertightness of the recess accommodating the busbar is increased, and high waterproofness is guaranteed.

According to the third aspect of the present invention, since the rib hits the insulating plate in a crushed state, the adhesion between the rib and the insulating plate is increased, and the waterproof performance is enhanced. In addition, since the bus bar is pressed by the crushed rib, the rattling of the bus bar is suppressed. At this time, since the ribs are elastically deformed, the pitch deviation of the bus bar and the like are absorbed.

According to the fourth aspect of the present invention, the bus bar can be locked by the rib in a state where the bus bar is housed in the recess, so that the assembling work is facilitated.

According to the fifth aspect of the present invention, when the rib is crushed, the rib comes into close contact with the insulating plate and largely contacts the bus bar. Therefore, the effect of improving the sealing property and the effect of preventing the rattle of the bus bar are increased.

According to the sixth aspect of the present invention, since the elastic material is largely elastically deformed, the degree of adhesion to the insulating plate increases,
The sealing performance is improved. Further, since the effect of pressing the bus bar is enhanced, it is possible to reliably prevent the rattle of the bus bar.

[Brief description of the drawings]

FIGS. 1A and 1B are configuration diagrams of a first embodiment of the present invention, wherein FIG. 1A is a cross-sectional view showing a state before assembling, and FIG. 1B is a cross-sectional view showing an assembled state.

FIG. 2 is a sectional view showing a main part of a second embodiment of the present invention.

FIG. 3 is a perspective view showing a state before assembling of a main part according to a third embodiment of the present invention.

FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is a perspective view of a main part of FIG.

FIGS. 6A and 6B are configuration diagrams of a third embodiment of the present invention, in which FIG. 6A is a cross-sectional view showing a state before assembling, and FIG. 6B is a cross-sectional view showing an assembled state.

FIG. 7 is a sectional view showing a main part of a fourth embodiment of the present invention.

FIG. 8 is an exploded perspective view showing an example of a conventional electric junction box.

FIG. 9 is a sectional view of a conventional example before assembly.

FIG. 10 is a sectional view of another conventional example.

11A and 11B are configuration diagrams of still another conventional example, in which FIG. 11A is a cross-sectional view showing a state before assembling, and FIG. 11B is a cross-sectional view showing a state in which ribs are melted.

[Explanation of symbols]

 Reference Signs List 51 bus bar wiring board 54 insulating substrate (insulating plate) 56 rib 58 recess 60 bus bar 65 elastomer (elastic material) layer 75 bus bar wiring board 78 insulating substrate 80 rib 82 head 90 recess 92 bus bar

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-62768 (JP, A) JP-A-8-9534 (JP, A) JP-A-4-354151 (JP, A) 119267 (JP, U) Japanese Utility Model Showa 61-126730 (JP, U) Japanese Utility Model Application Hei 2-83620 (JP, U) Japanese Utility Model Utility Model 3-37784 (JP, U) Japanese Utility Model Utility Model 4-137431 (JP, U) Japanese Utility Model 1983-46216 (JP, U) Japanese Utility Model Hei 2-17913 (JP, U) Japanese Utility Model 55-104325 (JP, U) Japanese Utility Model 163-160019 (JP, U) (58) Fields surveyed (Int.Cl. ⁶ , DB name) H02G 3/08-3/20

Claims (6)

(57) [Claims] 1. A busbar wiring board, wherein a recess is formed by projecting a rib along a predetermined pattern on the surface of an insulating substrate, and a busbar formed in the predetermined pattern is disposed in the recess. In the laminated structure of the bus bar wiring board obtained by further laminating an insulating plate on the bus bar wiring board,
A laminated structure of a bus bar wiring board, wherein an elastic material layer is formed on the back surface of the insulating plate, and the elastic material layer is pressed against the ends of the bus bar and the rib. 2. The laminated structure of a bus bar wiring board according to claim 1, wherein the height of the rib is larger than the thickness of the bus bar. 3. A bus bar wiring board, wherein a recess is formed by projecting ribs on a surface of an insulating substrate along a predetermined pattern, and a bus bar formed in the predetermined pattern is disposed in the recess. In the laminated structure of the bus bar wiring board obtained by further laminating an insulating plate on the bus bar wiring board,
A laminated structure of a bus bar wiring board, wherein the rib is formed of an elastic material so as to be higher than the bus bar, and the rib is crushed by pressing the insulating plate against the tip of the rib. 4. The laminated structure of a bus bar wiring board according to claim 3, wherein said rib has a head portion having a width larger than a root at a front end, and between the head portions of both side ribs constituting said recess. Wherein the distance between the two is set smaller than the width of the bus bar. 5. The laminated structure of a bus bar wiring board according to claim 4, wherein a cross-sectional shape of the head of the rib is formed in a rhombus shape with two vertexes directed sideways. Stacked structure of busbar wiring board. 6. The laminated structure of a bus bar wiring board according to claim 1, wherein said elastic material is made of an elastomer.