JP6999749B2 - Electrical equipment wiring parts - Google Patents

Description

The present application relates to electrical equipment wiring components.

In recent years, the number of electrical components mounted on automobiles has increased rapidly, and the amount of energization current to one electrical component has also tended to increase. Conventionally, in internal combustion engine type passenger cars, in order to reduce the number of wire harnesses for electrical components, reduce the wire diameter, and electrify mechanical operating parts, the voltage should be boosted to a voltage higher than the rated voltage of 12V. Is required. Therefore, the electrical junction box that distributes the power supply is provided with a circuit having a rated voltage of 12 V and a circuit to which a boosted high voltage is applied. When a circuit to which a different voltage is applied is provided inside the electrical junction box, a leakage current due to a potential difference is likely to occur.
Therefore, in the circuit body used for the conventional electric junction box, resin is filled between the low voltage system bus bar and the high voltage system bus bar where leakage current is likely to occur, and between the high voltage system bus bars to generate the leakage current. It is configured to prevent (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2007-27636

However, in the circuit body used for the electric junction box disclosed in Patent Document 1, the high-voltage system or low-voltage system bus bar is entirely covered with the resin, and the resin and the high-voltage system or low-voltage system bus bar face each other. There is a possibility that cracks will occur in the parts where the bus bar is used due to the difference in the linear expansion coefficient between the bus bar and the resin.
The occurrence of cracks is remarkable when used in an environment where the temperature changes rapidly. In particular, when the temperature drops, the linear expansion coefficient of the resin is larger than the linear expansion coefficient of the bus bar, so the shrinkage ratio (shrinkage amount) of the resin is larger than the shrinkage ratio (shrinkage amount) of the bus bar, and the bus bar and the resin Since there is a difference in shrinkage ratio (shrinkage amount), there is a high possibility that stress will be generated in the resin and cracks will occur. When a crack occurs, conductive contamination may invade from the crack, and if another bus bar is in close proximity to the circuit body used for the electrical junction box, the conductive contamination invades the crack, causing one bus bar to enter. There is a possibility of a short circuit between the bus bar and the other bus bar, which causes a problem of reduced reliability.

The present application discloses a technique for solving the above-mentioned problems, and an object of the present application is to provide a wiring component for an electric device with improved reliability.

The electrical equipment wiring component disclosed in the present application includes a resin substrate, an insert component integrally molded on the substrate on one surface of the substrate, and electricity arranged on one surface of the insert component with a gap. When a conductor is provided , one surface of the electric conductor is covered with the insert component, the other surface is exposed from the integrally molded resin substrate, and the insert component is a resin. The insert component is a grade having the same linear expansion coefficient as the substrate, or a thermoplastic resin having a thermal modification temperature of 100 ° C. or higher, and has a linear expansion coefficient different from the linear expansion coefficient of the substrate. It is composed of a grade, and when the insert component is made of metal, the linear expansion coefficient of the insert component is larger than the linear expansion coefficient of the electric conductor and smaller than the linear expansion coefficient of the substrate. It is a thing.
Further, the electrical equipment wiring component disclosed in the present application is arranged on a resin substrate and one surface of the substrate, and is integrally formed on the substrate and is arranged on one surface of the insert component with a gap. The insert component is provided with a plurality of the electric conductors, and the electric conductor is formed by being sandwiched between the plurality of insert components. When the insert component is a resin, the insert is provided. The component is a grade having the same linear expansion coefficient as the linear expansion coefficient of the substrate, or a thermoplastic resin having a thermal modification temperature of 100 ° C. or higher and having a linear expansion coefficient different from the linear expansion coefficient of the substrate. When the insert component is made of metal, the linear expansion coefficient of the insert component is larger than the linear expansion coefficient of the electric conductor and smaller than the linear expansion coefficient of the substrate. be.

According to the electrical equipment wiring component disclosed in the present application, an electrical equipment wiring component with improved reliability can be obtained.

It is a front view of the electric equipment wiring component by Embodiment 1. FIG. It is sectional drawing of the line AA of FIG. 1A. FIG. 3 is a cross-sectional view taken along the line BB of FIG. 1A. It is a front view of the electric equipment wiring component by Embodiment 2. FIG. FIG. 2 is a cross-sectional view taken along the line CC of FIG. 2A. FIG. 2 is a cross-sectional view taken along the line DD of FIG. 2A. It is sectional drawing of the electric equipment wiring component by Embodiment 3. FIG. It is sectional drawing of the electric equipment wiring component by Embodiment 4. FIG. FIG. 5 is a cross-sectional view of an electrical equipment wiring component according to a fifth embodiment. It is sectional drawing of the electric equipment wiring component by Embodiment 6. It is sectional drawing of the electric equipment wiring component by Embodiment 7. FIG. It is a front view which shows the state which attached the electric equipment wiring component to an electric equipment according to Embodiment 7. FIG. 8 is a cross-sectional view taken along the line EE of FIG. 8A. It is a front view of the electric equipment wiring component by Embodiment 8. FIG. 9A is a cross-sectional view taken along the line FF of FIG. 9A. 9A is a cross-sectional view taken along the line GG of FIG. 9A.

Embodiment 1.
Hereinafter, the first embodiment will be described with reference to the drawings. In each drawing, the same reference numerals indicate the same or corresponding parts.

FIG. 1A is a front view of an electrical equipment wiring component according to the first embodiment. 1B is a cross-sectional view taken along the line AA of FIG. 1A, and FIG. 1C is a cross-sectional view taken along the line BB of FIG. 1A.
As shown in FIGS. 1A, 1B and 1C, the electrical equipment wiring component 50 is arranged on one surface of the main molding resin 1 which is a resin substrate and the main molding resin 1, and is integrally molded with the main molding resin 1. The insert component 2 is provided with an electric conductor 3 such as a bus bar arranged on one surface of the insert component 2. In the electrical equipment wiring component 50 according to the first embodiment, a rectangular parallelepiped electric conductor 3 is shown, but the electric conductor 3 does not necessarily have to be a rectangular parallelepiped.

In FIGS. 1B and 1C, one surface of the electric conductor 3 faces the insert component 2 and is covered with the insert component 2. On the other hand, the other surface on the opposite side of one surface of the electric conductor 3 is exposed to the outside from the integrally molded main molding resin 1. Since the other surface of the electric conductor 3 exposed to the outside has few portions facing the main molding resin 1, cracks due to the difference in linear expansion coefficient between the electric conductor 3 and the main molding resin 1 are unlikely to occur.
In the electrical equipment wiring component 50 according to the first embodiment, first, the insert component 2 is set in the main molding lower mold, the electric conductor 3 is superposed on the upper surface of the insert component 2, and then, for example, injection molding is performed in the stacked state. It is formed by being integrally molded with a resin. Therefore, a gap 6 which is a minute interface is generated between the electric conductor 3 and the insert component 2. The electric conductor 3 is arranged on one surface of the insert component 2 with a gap 6 interposed therebetween.

Therefore, when a sudden temperature change occurs, the electric conductor 3 and the insert component 2 expand or contract independently of each other, so that stress is less likely to occur in the molding resin 1 and the occurrence of cracks can be suppressed. In particular, on the surface where the electric conductor 3 and the present molding resin 1 are in contact with each other, the longer the distance between the ends of the contact surface is, the more expansion or contraction occurs due to the difference in the linear expansion coefficient. When the insert component 2 is inserted into the surface in contact with the main molding resin 1, the effect of heat shock resistance is large.

Further, the insert component 2 has no functional problem regardless of whether it is made of resin or metal. That is, since a gap 6 which is a minute interface is generated on the surface where the electric conductor 3 and the insert component 2 are in contact with each other, cracks due to the difference in the linear expansion coefficient do not occur, so that the difference in the linear expansion coefficient is large. There is no problem. On the other hand, the difference in linear expansion coefficient between the main molding resin 1 which is a resin substrate and the insert component 2 needs to be small. In the electrical equipment wiring component 50 according to the first embodiment, it is sufficient that the difference in the linear expansion coefficient between the molded resin 1 and the insert component 2 is small and the numerical value of the linear expansion coefficient is close, and the magnitude of the linear expansion coefficient does not matter. ..

When the insert component 2 is a resin, the insert component 2 may be a grade having the same linear expansion coefficient as the present molding resin 1, or is a thermoplastic resin having a heat denaturation temperature of 100 ° C. or higher and is the present molding resin. It may be composed of a grade having a linear expansion coefficient different from the linear expansion coefficient of 1. Examples of the resin material used in the molding resin 1 or the insert component 2 include polyphenylene sulfide (PPS) resin, polybutylene terephrate (PBT) resin, and polyetheretherketone (Poly) resin. Examples thereof include Ether Ether Ketone (PEEK) resin, Polyamide Image (PAI) resin and the like.
When the insert component 2 is a resin and is composed of a grade having a linear expansion coefficient different from the linear expansion coefficient of the present molding resin 1, the grade of the insert component 2 and the grade of the present molding resin 1 are used. It is preferable that the difference in linear expansion coefficient is small.
When the insert component 2 is made of metal, it is preferable that the linear expansion coefficient of the insert component 2 is larger than the linear expansion coefficient of the electric conductor 3 and smaller than the linear expansion coefficient of the present molding resin 1.
Further, it is preferable that the insert component 2 has a linear expansion coefficient close to that of the present molding resin 1, and a material other than resin or metal may be used.

As described above, the electrical equipment wiring component 50 according to the first embodiment has a resin substrate, an insert component 2 arranged on one surface of the substrate and integrally molded on the substrate, and a gap 6 on one surface of the insert component 2. When the insert component 2 is made of resin and includes an electric conductor 3 arranged apart from each other, the insert component 2 is a grade having the same linear expansion coefficient as the linear expansion coefficient of the substrate, or has a thermal modification temperature of 100 ° C. When the above thermoplastic resin is made of a grade having a linear expansion coefficient different from the linear expansion coefficient of the substrate and the insert component 2 is made of metal, the linear expansion coefficient of the insert component 2 is the electric conductor 3. It is characterized in that it is larger than the linear expansion coefficient of the substrate and smaller than the linear expansion coefficient of the substrate.
Therefore, in the electrical equipment wiring component 50 according to the first embodiment, it is possible to suppress the generation of stress on the resin substrate and suppress the generation of cracks. As a result, it is possible to suppress the intrusion of conductive contamination from cracks, and it is possible to improve reliability.

Embodiment 2.
FIG. 2A is a front view of the electrical equipment wiring component according to the second embodiment. 2B is a cross-sectional view taken along the line CC of FIG. 2A, and FIG. 2C is a cross-sectional view taken along the line DD of FIG. 2A. Regarding the description of the electrical equipment wiring component 50 according to the second embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
As shown in FIGS. 2A, 2B and 2C, in the electrical equipment wiring component 50 according to the second embodiment, a plurality of insert components 2a and 2b are arranged in an overlapping manner, and a bus bar made of, for example, copper is arranged on one surface of the insert component 2a. The electric conductors 3a and 3b such as the above are arranged in an overlapping manner, and the electric conductors 3a and 3b and the insert parts 2a and 2b are integrally molded with the present molding resin 1.
The electrical equipment wiring component 50 according to the second embodiment has a structure in which two electrical conductors 3a and 3b and insert components 2a and 2b are continuously stacked. There is no problem even if the number of consecutive sheets is two or more, and by stacking a plurality of electric conductors 3, there is an effect that the current path increases and the electric resistance decreases.

One surface of the electric conductor 3b faces the insert component 2a and is covered with the insert component 2a. On the other hand, the other surface of the electric conductor 3a is exposed to the outside from the integrally molded main molding resin 1. Since the other surface of the electric conductor 3a exposed to the outside has few portions facing the main molding resin 1, cracks due to the difference in linear expansion coefficient between the electric conductor 3a and the main molding resin 1 are unlikely to occur. Further, in the second embodiment as in the first embodiment, a gap 6 which is a minute interface is generated between the electric conductor 3b and the insert component 2a. The electric conductor 3b is arranged on one surface of the insert component 2a with a gap 6 interposed therebetween. Therefore, when a sudden temperature change occurs, the electric conductor 3b and the insert component 2a expand or contract independently of each other, so that stress is less likely to occur in the molding resin 1 and the occurrence of cracks can be suppressed.

Further, as shown in FIG. 2A, in the electric device wiring component 50 according to the second embodiment, in order to connect the electric device wiring component 50 to another electric device wiring component, the electric conductors 3a and 3b are the present molding resin 1. It extends outward from and is exposed. Further, for example, a connection hole 5 is provided at the tip of the electric conductors 3a and 3b. By stacking a plurality of electric conductors 3a and 3b, the flexibility of the electric conductors 3a and 3b is improved, and the tolerance at the time of assembly can be absorbed. Further, by stacking a plurality of insert parts 2a and 2b, there is an effect that the possibility of water intrusion into the electric equipment wiring part 50 can be reduced when a crack occurs in the molding resin 1.

Embodiment 3.
FIG. 3 is a cross-sectional view of the electrical equipment wiring component according to the third embodiment. Regarding the description of the electrical equipment wiring component 50 according to the third embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
As shown in FIG. 3, in the electrical equipment wiring component 50 according to the third embodiment, the insert component 2c and 2d are sandwiched above and below the electric conductor 3, and the insert component 2d, the electrical conductor 3 and the insert component 2c are included in the present. It is integrally molded with the molding resin 1. In the electrical equipment wiring component 50 according to the third embodiment, the upper and lower surfaces of the electric conductor 3 are in contact with the insert components 2c and 2d, and both one surface and the other surface of the electric conductor 3 are covered with the insert components 2c and 2d. ing. Further, the electric conductor 3 and the insert parts 2c and 2d each have a gap 6 which is a minute interface.

According to the electrical equipment wiring component 50 according to the third embodiment, a plurality of insert components 2c and 2d are provided, and the electric conductor 3 is formed by being sandwiched between the plurality of insert components 2c and 2d. Therefore, when the electrical equipment wiring component 50 is exposed to a sudden temperature change, the contact surfaces of the insert components 2c and 2d and the electrical conductor 3 expand or contract independently of each other, so that stress is applied to the molded resin 1. It is unlikely to occur and the occurrence of cracks can be suppressed.

Embodiment 4.
FIG. 4 is a cross-sectional view of the electrical equipment wiring component according to the fourth embodiment. Regarding the description of the electrical equipment wiring component 50 according to the fourth embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
As shown in FIG. 4, in the electrical equipment wiring component 50 according to the fourth embodiment, the structure is such that two electric conductors 3c and 3d and three insert components 2e and 2f and 2g are alternately arranged, and the insert component 2g. , The electric conductor 3d, the insert part 2f, the electric conductor 3c and the insert part 2e are integrally molded with the present molding resin 1.

In the electrical equipment wiring component 50 according to the fourth embodiment, both one side and the other side of the electric conductors 3c and 3d are covered with the insert parts 2e and 2f and the insert parts 2f and 2g, respectively. The electrical equipment wiring component 50 according to the fourth embodiment has a structure in which two electric conductors 3c and 3d and three insert components 2e, 2f and 2g are alternately arranged. There is no problem if the molding resin 1 is not directly facing the molding resin 1. It is also possible to stack the electric conductor 3 and the insert component 2 in this order on the insert component 2e.

Embodiment 5.
FIG. 5 is a cross-sectional view of the electrical equipment wiring component according to the fifth embodiment. Regarding the description of the electrical equipment wiring component 50 according to the fifth embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
As shown in FIG. 5, in the electrical equipment wiring component 50 according to the fifth embodiment, the insert component 2h is provided with two or more protrusions 8, and the electric conductor 3 is provided with a hole along the protrusion 8 of the insert component 2h. A unit 9 is provided. By inserting the protrusion 8 into the hole 9, the relative position of the electric conductor 3 with respect to the insert component 2h is fixed. And vice versa. For example, the electric conductor 3 is provided with two or more protrusions by semi-penetration processing or the like, and the protrusions are inserted into the holes provided in the insert part 2h to fix the relative positions of the insert part 2h and the electric conductor 3. can do.

As a method of determining the relative position between the electric conductor 3 and the insert component 2h, for example, when the electric conductor 3 is a rectangular parallelepiped, one side surface of the rectangular parallelepiped is a protrusion provided on the insert component 2h side to determine the relative position of the electric conductor 3. A method of restricting movement can be considered. Further, a method of restricting the position by the protrusions and holes of the electric conductor 3 or the insert component 2h, and a method of restricting the side surface of the rectangular parallelepiped by the insert component 2h can be considered. It is also possible to connect and fix another member to the electric conductor 3 and use it for positioning the electric conductor 3 and the insert component 2h. Similarly, the insert component 2h can be used for relative positioning with the electric conductor 3 by connecting and fixing another member.

Embodiment 6.
FIG. 6 is a cross-sectional view of the electrical equipment wiring component and the main molding lower mold according to the sixth embodiment. Regarding the description of the electrical equipment wiring component 50 according to the sixth embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
As shown in FIG. 6, in the electrical equipment wiring component 50 according to the sixth embodiment, the relative position of the insert component 2i with respect to the main molding lower mold 4 is fixed by providing the insert component 2i with two or more protrusions 8a. .. And vice versa. The main molding lower mold 4 is provided with two protrusions, the insert part 2i is provided with a hole along the protrusion, and the protrusion is inserted into the hole so that the relative position of the insert part 2i with respect to the main molding lower mold 4 can be set. It is fixed. Further, as in the fifth embodiment, another component connected to and fixed to the insert component 2i can be used for positioning with the main molding lower die 4.

Embodiment 7.
FIG. 7 is a cross-sectional view of the electrical equipment wiring component and the main molding lower mold according to the seventh embodiment. Regarding the description of the electrical equipment wiring component 50 according to the seventh embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
The electrical equipment wiring component 50 shown in FIG. 7 is formed by contacting the insert component 2j with the main molding lower die 4. Further, FIG. 8A is a front view of a state in which the electrical equipment wiring component 50 according to the seventh embodiment is attached to the electrical equipment 10, and FIG. 8B is a cross-sectional view taken along the line EE of FIG. 8A. be.
As shown in FIG. 7, in the electrical equipment wiring component 50 according to the seventh embodiment, the insert component 2j is provided with the protrusion 8b, and the surface of the protrusion 8b of the insert component 2j is brought into contact with the lower mold 4 of the present molding. It can be fixed to the molding lower mold 4. When the electric conductor 3 was placed on the main molding lower mold 4 with the protrusion 8b of the insert component 2j in contact with the main molding lower mold 4, the electric conductor 3 was molded by the main molding lower mold 4 of the electrical equipment wiring component 50 after molding. The surface becomes flat like the flat surface 7.

For example, as shown in FIG. 8B, when the electrical equipment wiring component 50 is connected to the internal component 11 of the electrical equipment 10 so that the protrusion 8b of the insert component 2j is exposed on the top side, the book of the electrical equipment wiring component 50 Since the surface formed by the lower die 4 is a flat surface 7, the structure is such that liquid does not collect. Here, the electric device 10 is, for example, an inverter, and the internal component 11 is, for example, a capacitor. Further, as another method, there is also a method in which the insert portion 2j is not provided with the protrusion 8b, but the main molding lower mold 4 is provided with the protrusion, and the position in the vertical direction with respect to the main molding lower mold 4 is fixed. Further, the mounting position of the electrical equipment wiring component 50 may be anywhere, but the effect is exhibited when the protrusion 8b exposed to the outside of the insert component 2j is installed in the top direction.

Embodiment 8.
FIG. 9A is a front view of the electrical equipment wiring component according to the eighth embodiment. 9B is a cross-sectional view taken along the line FF of FIG. 9A, and FIG. 9C is a cross-sectional view taken along the line GG of FIG. 9A. Regarding the description of the electrical equipment wiring component 50 according to the eighth embodiment, the same components as those of the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.
As shown in FIGS. 9A, 9B and 9C, in the electrical equipment wiring component 50 according to the eighth embodiment, a plurality of electrical conductors 3e and 3f are arranged in parallel on one surface of the insert component 2k. Further, the electrical equipment wiring component 50 is formed by arranging the electrical conductors 3e and 3f on the upper surface of the insert component 2k, respectively, and integrally molding the electrical conductors 3e and 3f and the insert component 2k with the present molding resin 1. Has been done.

As shown in FIGS. 9A, 9B and 9C, the insert component 2k does not have to have a one-to-two relationship with the electric conductors 3e and 3f. For example, when there are two electric conductors 3e and 3f, the insert component 2k does not have to have a one-to-two relationship. It may be separate for the electric conductors 3e and 3f. If the two electrical conductors 3e and 3f use one insert component 2k for two and the two electrical conductors 3e and 3f have different potentials, the insert component 2k needs to use an insulating material. Further, when there are two electric conductors 3e and 3f, one insert component 2k corresponds to each of the electric conductors 3e and 3f, and the insulation is maintained from each other, the insert component 2k is used. There is no problem even if the material has conductivity. Further, when a conductive material is used, the cross-sectional area through which the current passes becomes large, so that there is an effect of reducing the electric resistance.

Although the present application describes various exemplary embodiments and examples, the various features, embodiments, and functions described in one or more embodiments are applications of a particular embodiment. It is not limited to, but can be applied to embodiments alone or in various combinations.
Therefore, innumerable variations not illustrated are envisioned within the scope of the techniques disclosed herein. For example, it is assumed that at least one component is modified, added or omitted, and further, at least one component is extracted and combined with the components of other embodiments.

1 molded resin, 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k insert parts, 3, 3a, 3b, 3c, 3d, 3e, 3f electric conductor, 4 pieces Molded lower mold, 5 connection holes, 6 gaps, 7 flat surfaces, 8, 8a, 8b protrusions, 9 holes, 10 electrical equipment, 11 internal parts, 50 electrical equipment wiring parts

Claims (4)

With a resin substrate,
Insert parts arranged on one surface of the substrate and integrally molded on the substrate, and
An electric conductor arranged on one surface of the insert component with a gap, and provided .
One surface of the electrical conductor is covered with the insert component, and the other surface is exposed from the integrally molded resin substrate.
When the insert component is a resin, the insert component is a grade having the same linear expansion coefficient as the linear expansion coefficient of the substrate, or a thermoplastic resin having a thermal denaturation temperature of 100 ° C. or higher, and the linear expansion of the substrate. It is composed of grades with a linear expansion coefficient different from the coefficient.
When the insert component is made of metal, the linear expansion coefficient of the insert component is larger than the linear expansion coefficient of the electric conductor and smaller than the linear expansion coefficient of the substrate. With a resin substrate,
Insert parts arranged on one surface of the substrate and integrally molded on the substrate, and
An electric conductor arranged on one surface of the insert component with a gap, and provided.
A plurality of the insert parts are provided, and the insert parts are provided.
The electric conductor is formed by being sandwiched between the plurality of insert parts .
When the insert component is a resin, the insert component is a grade having the same linear expansion coefficient as the linear expansion coefficient of the substrate, or a thermoplastic resin having a thermal denaturation temperature of 100 ° C. or higher, and the linear expansion of the substrate. It is composed of grades with a linear expansion coefficient different from the coefficient.
When the insert component is made of metal, the linear expansion coefficient of the insert component is larger than the linear expansion coefficient of the electric conductor and smaller than the linear expansion coefficient of the substrate . The electrical equipment wiring component according to claim 1 or 2, wherein the insert component or the electrical conductor is provided with a protrusion. A plurality of the electric conductors are provided, and the electric conductors are provided.
The electrical equipment wiring component according to claim 1 or 2, wherein the plurality of electric conductors are arranged in parallel on the one surface of the insert component.

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