JP2022096685A - Electric junction box and wiring harness - Google Patents

Abstract

To achieve weight saving.SOLUTION: An electric junction box includes: a metal housing 10, having a housing chamber 10a enclosed by a peripheral wall 11 and fixed on a conductive vehicle body BD; a conductive electric connector 20 which electrically connects a core wire of a first shield wire We1 on a first connection object side to a core wire of a second shield wire We2 on a second connection object side, which are arranged in the housing chamber 10a and drawn from the outside of the housing 10 to the housing chamber 10a, so as to electrically connect between the core wires; a terminal fitting 30 having an electrical connection part 31, to which a braided body of the second shield wire We2 is physically and electrically connected, and a stationary part 32 fixed to an outer wall surface 11b of the peripheral wall 11; and a fastening structure 40 in which the stationary part 32 of the terminal fitting 30 is fixed to the outer wall surface 11b of the peripheral wall 11.SELECTED DRAWING: Figure 1

Description

The present invention relates to an electrical junction box and a wire harness.

Conventionally, in a vehicle, for example, an electric wire on the first connection target side and a second connection target side are provided by interposing between a secondary battery and a plurality of power supply targets to distribute power to each power supply target. It is equipped with an electric junction box that electrically connects the electric wires in the housing. Then, various parts such as parts responsible for electrical connection of each electric wire and parts (relays, fuses, etc.) arranged on the electric circuit are housed in the storage chamber inside the housing. Further, in this electric connection box, a case in which a housing is molded of a metal material is known in order to suppress noise from entering the storage chamber. For example, Patent Document 1 below discloses this type of electrical junction box. Such an electrical junction box constitutes a wire harness together with a plurality of electric wires drawn into the accommodation chamber from the first connection object side or the second connection object side.

Japanese Unexamined Patent Publication No. 2014-93888

By the way, in the electrical junction box, a shielded electric wire is pulled into the accommodation chamber of the metal housing from the first connection object side or the second connection object side, and the braided body of the shielded electric wire is put into the terminal fitting in the accommodation chamber. It is known that the noise on the braid is released from the housing to the vehicle body by fixing the noise to the housing via the housing. In the electrical connection box with such noise countermeasures, not only the storage space and attachment / detachment work space for various parts arranged in the accommodation room, but also the accommodation space and attachment / detachment work space for the terminal fittings for noise removal are also available. Must be secured in the containment room. Therefore, this electrical connection box requires a housing having a large volume of the accommodation chamber, and the increase in the size of the housing causes an increase in weight. However, in recent years, there is a demand for weight reduction in vehicles in order to improve fuel efficiency or electricity cost and environmental performance, and electric connection boxes are no exception.

Therefore, an object of the present invention is to provide an electric connection box that can be reduced in weight.

In order to achieve the above object, the electric junction box according to the present invention has a storage chamber surrounded by an outer peripheral wall, and is arranged in the storage chamber and a metal housing fixed to a conductive vehicle body. The core wire of the first shielded wire on the first connection object side and the core wire of the second shielded wire on the second connection target side, which are drawn into the accommodation chamber from the outside of the housing, are electrically connected to each other. With respect to the conductive electrical connection tool in which the core wires are electrically connected to each other, the electrical connection portion to which the braided body of the second shielded electric wire is physically and electrically connected, and the outer wall surface of the outer peripheral wall. It is characterized by comprising a terminal fitting having a fixed portion fixed to the terminal fitting, and a fastening structure in which the fixing portion of the terminal fitting is fixed to the outer wall surface of the outer peripheral wall.

Further, in order to achieve the above object, the wire harness according to the present invention includes a first shielded electric wire on the first connection object side, a second shielded electric wire on the second connection object side, and accommodation surrounded by an outer peripheral wall. A metal housing having a chamber and fixed to a conductive vehicle body, and a first shielded electric wire arranged in the housing chamber and drawn into the storage chamber from outside the housing. A conductive electric connector in which the core wire and the core wire of the second shielded electric wire are electrically connected to each other and the core wires are electrically connected to each other, and the braided body of the second shielded electric wire are physically and electrically connected. A terminal fitting having an electrical connection portion and a fixing portion fixed to the outer wall surface of the outer peripheral wall, and a fastening structure in which the fixing portion of the terminal fitting is fixed to the outer wall surface of the outer peripheral wall. It is characterized by having.

In the electrical connection box according to the present invention, the terminal fitting is fixed to the outer wall surface of the outer peripheral wall of the housing outside the housing. Therefore, in this electrical connection box, the volume of the housing chamber of the housing can be reduced, so that the housing can be miniaturized, and the weight of the housing can be reduced accordingly. Therefore, the electric connection box according to the present invention can be reduced in weight. Further, the wire harness according to the present invention is provided with such an electric connection box, and the effect obtained by this electric connection box can be similarly exhibited.

FIG. 1 is a perspective view showing an electrical connection box and a wire harness according to an embodiment. FIG. 2 is an exploded perspective view of the electrical connection box and the wire harness of the embodiment partially disassembled. FIG. 3 is an explanatory diagram schematically showing and explaining an installation mode of the electrical connection box and the wire harness of the embodiment. FIG. 4 is an exploded perspective view between the case body and the electrical connector. FIG. 5 is an exploded perspective view of the case body and the electrical connector as viewed from another angle. FIG. 6 is a plan view of the case body as viewed from the opening side for the first work. FIG. 7 is a plan view of the case body as viewed from the opening side for the second work. FIG. 8 is an enlarged view of the route regulation portion as seen in the direction of arrow A in FIG. FIG. 9 is a perspective view showing a route regulation unit. FIG. 10 is a perspective view of the electrical connector from which the cover member has been removed.

Hereinafter, embodiments of the electrical connection box and the wire harness according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

[Embodiment]
One of the embodiments of the electric connection box and the wire harness according to the present invention will be described with reference to FIGS. 1 to 10.

Reference numeral 1 in FIGS. 1 to 3 indicates an electrical connection box according to this embodiment. Further, the reference numeral WH in FIG. 1 indicates the wire harness of the present embodiment provided with the electrical connection box 1.

The electrical junction box 1 is interposed between the first connection object (not shown) and the second connection object (not shown), and the first electric wire We1 and the second connection object on the first connection object side are interposed. The second electric wire We2 on the side is pulled inward and electrically connected (FIGS. 1 to 3). The electric connection box 1 forms a wire harness WH together with the first electric wire We1 and the second electric wire We2. In the electrical connection box 1 and the wire harness WH, at least one of the first electric wire We1 and the second electric wire We2 are used. For example, in the electric connection box 1 and the wire harness WH shown here, shielded electric wires are used for the first electric wire We1 and the second electric wire We2, respectively, and measures for suppressing the intrusion of noise from the outside are taken. Therefore, in the following, the electric junction box 1 and the wire harness WH will be described assuming that the first shielded electric wire We1 as an example of the first electric wire We1 and the second shielded electric wire We2 as an example of the second electric wire We2 are provided. conduct.

Although not shown, the first shielded electric wire We1 has a cylindrical conductive core wire, a cylindrical insulating inner coating (inner sheath) that concentrically covers the core wire, and a cylindrical shape that concentrically covers the inner coating. It comprises a conductive braid and a cylindrical insulating outer coating (outer sheath) that concentrically covers the braid. Although not shown, the second shielded electric wire We2 has a cylindrical conductive core wire, a cylindrical insulating inner coating (inner sheath) that concentrically covers the core wire, and a cylinder that concentrically covers the inner coating. It comprises a conductive braid and a cylindrical insulating outer coating (outer sheath) that concentrically covers the braid.

The electric junction box 1 and the wire harness WH exemplified here are mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and have a secondary battery as a first connection target and a power distribution target as a second connection target (for example,). , Supplementary notes to be supplied, etc.) to distribute power to the power distribution target. Therefore, in the electric connection box 1 and the wire harness WH exemplified here, a pair of first shielded electric wires We1 and We1 (first shielded electric wire We1 for the positive electrode and first shield for the negative electrode) electrically connected to the secondary battery. The electric wire We1) and a pair of second shielded electric wires We2 and We2 (second shielded electric wire We2 for the positive electrode and second shielded electric wire We2 for the negative electrode) electrically connected to the power distribution object are used. Further, in the electrical connection box 1 and the wire harness WH exemplified here, a plurality of sets of the pair of second shielded electric wires We2 and We2 are used.

The electrical connection box 1 includes a metal housing 10 (FIGS. 1 to 3). Further, the electrical connection box 1 includes a conductive electrical connector 20 for electrically connecting the first shielded electric wire We1 and the second shielded electric wire We2 inside the housing 10 (FIGS. 2 and 3). Further, the electrical connection box 1 includes a terminal fitting 30 for escaping noise on the braided body of the second shielded electric wire We2, and a fastening structure 40 for fixing the terminal fitting 30 to the housing 10 (FIGS. 1 and 1). Figure 2).

The housing 10 is formed of a metal material such as aluminum or an aluminum alloy and is fixed to a conductive vehicle body BD (FIG. 3). The housing 10 has a storage chamber 10a surrounded by an outer peripheral wall 11 (FIGS. 2 to 5).

The housing 10 shown here includes a metal case body 10A having a cylindrical outer peripheral wall 11 having both ends opened in the cylindrical axis direction (FIGS. 1 to 5). In this case body 10A, the openings at both ends in the tubular axis direction are used as the first work opening 10b and the second work opening 10c when inserting or assembling the parts to be arranged in the storage chamber 10a, respectively. It is used (FIGS. 2 to 5). Here, the first shielded electric wire We1 is pulled into the accommodation chamber 10a from the side of the first working opening 10b, and the connector 51 of one terminal of the first shielded electric wire We1 is electrically connected to the electrical connection tool 20 of the accommodation chamber 10a. (Fig. 2 and Fig. 3). Further, here, the second shielded electric wire We2 is pulled into the accommodation chamber 10a from the side of the second working opening 10c, and the connector 52 of one terminal of the second shielded electric wire We2 is electrically connected to the electrical connection tool 20 of the accommodation chamber 10a. Connect (Fig. 3). Although not shown here, the other terminal of the first shielded electric wire We1 is provided with a connector for electrical connection to the first connection object side. Further, the other terminal of the second shielded electric wire We2 is provided with a connector for electrical connection to the second connection object side.

In the case body 10A, a pair of first shielded electric wires We1 and We1 are drawn into the accommodation chamber 10a from the outside of the housing 10 at the end of the outer peripheral wall 11 on the side of the first working opening 10b (in other words, in other words). For example, a first notch 12a (for pulling out the first shielded electric wires We1 and We1 from the accommodation chamber 10a to the outside of the housing 10) is formed (FIGS. 2, 4 and 6). The end surface of the first notch 12a on the side of the first working opening 10b is used as an insertion port 12a ₁ when a pair of first shielded electric wires We1 and We1 are inserted into the first notch 12a. The first notch 12a forms an opening in which the insertion port 12a ₁ is closed by the cover 10B in a state where the cover 10B described later is assembled to the case main body 10A. Here, the opening is an opening connecting the inside and outside of the housing 10, and is used as an inlet or outlet of the pair of first shielded electric wires We1 and We1. The first notch 12a may be provided for each of the first shielded electric wires We1.

The pair of first shielded electric wires We1 and We1 shown here are held together by, for example, a synthetic resin electric wire holder 55, and are fixed to the housing 10 via the electric wire holder 55 (FIG. FIG. 1 and FIG. 2). The wire holder 55 is arranged in the first notch 12a. Then, the electric wire holder 55 is fixed to the housing 10 by being screwed and fixed to the case body 10A. The accommodation chamber 10a of the case body 10A is provided with an electric wire fixing portion 13 having a female screw portion N1 protruding from the inner wall surface 11a of the outer peripheral wall 11 (FIGS. 2, FIG. 4, FIG. 6 and FIG. 7). ). The wire holder 55 is screwed and fixed to the wire fixing portion 13 by screwing the male screw member B1 (FIG. 2) into the female screw portion N1.

Further, in the case main body 10A, a pair of second shielded electric wires We2 and We2 are drawn into the accommodation chamber 10a from the outside of the housing 10 at the end portion of the outer peripheral wall 11 on the side of the second working opening 10c (in other words). If so, a second notch 12b (for pulling out the second shielded electric wires We2 and We2 from the accommodation chamber 10a to the outside of the housing 10) is formed (FIGS. 2, FIG. 4, FIG. 5 and FIG. 7). The end surface of the second notch 12b on the side of the second working opening 10c is used as an insertion port 12b ₁ for inserting a pair of second shielded electric wires We2 and We2 into the second notch 12b. The second notch 12b forms an opening in which the insertion port 12b ₁ is closed by the floor panel in a state where the case body 10A is fixed to the floor panel of the vehicle body BD described later. Here, the opening is an opening connecting the inside and outside of the housing 10, and is used as an inlet or outlet of the pair of second shielded electric wires We2 and We2. The second notch 12b is provided for each pair of second shielded electric wires We2 and We2. The second notch 12b may be provided for each second shielded electric wire We2.

The housing 10 is fixed to the vehicle body BD with the first working opening 10b facing upward in the vehicle and the second working opening 10c facing downward in the vehicle. Here, the case body 10A is fixed to the floor panel of the vehicle body BD. In the case body 10A, the peripheral edge of the second working opening 10c on the outer peripheral wall 11 is placed on the floor panel of the vehicle body BD, and the case main body 10A is fixed to the floor panel in a state where the second working opening 10c is closed by the floor panel. To. For example, the case body 10A is screwed and fixed to the floor panel.

Further, the housing 10 shown here is assembled to the peripheral edge portion of the outer peripheral wall 11 of the case body 10A on the side of the first working opening 10b, and includes a metal cover 10B that closes the first working opening 10b. 1 to 3). The cover 10B is screwed and fixed to the case body 10A. Here, a plurality of female screw portions N2 are formed on the end surface of the outer peripheral wall 11 of the case main body 10A on the side of the first working opening 10b, and the male screw member B2 is screwed into each of the female screw portions N2 to cover the cover. 10B is screwed and fixed to the case body 10A (FIG. 2).

The housing 10 may be assembled to the case body 10A and provided with a metal cover that closes the second working opening 10c.

Here, with respect to the pair of first shielded electric wires We1 and We1, the route is regulated by the electric wire holder 55 at the first notch 12a, so that when the cover 10B is assembled to the case main body 10A, the case main body 10A and the case main body 10A are used. It is unlikely that it will be bitten into the cover 10B, and it is also unlikely that it will interfere with the cover 10B after assembly.

However, unlike the first shielded electric wire We1, the pair of second shielded electric wires We2 and We2 are not provided with a separate member that controls the route. It is necessary to take measures to avoid biting between the case body 10A and the floor panel when fixing to the floor panel and interference with the floor panel after fixing. Therefore, the housing 10 is provided with a route regulation unit 14 for restricting the route of the pair of second shielded electric wires We2 and We2 passing through the second notch 12b (FIGS. 5 to 9). The route regulation unit 14 is provided for each second notch 12b. Therefore, if the second notch 12b passes through the pair of second shielded electric wires We2 and We2, the route regulating unit 14 is formed to regulate the route of the pair of second shielded electric wires We2 and We2. If the second notch 12b passes through one second shielded electric wire We2, it is formed to regulate the route of this one second shielded electric wire We2.

The route restricting portion 14 is a portion for suppressing the detachment of the pair of second shielded electric wires We2 and We2 from the insertion port 12b1 in the _second notch 12b, and is used for the second work on the outer peripheral wall 11. The pair of second shielded electric wires We2 and We2 are formed at the end on the opening 10c side so as to be fastened in the second notch 12b. Specifically, the route restricting portion 14 protrudes from the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11 of the case body 10A, and the inner wall surface 11a or the outer wall surface 11b and the second notch 12b of the outer peripheral wall 11 are projected. It is formed into a cantilever shape that is arranged facing each other with a space between them. That is, the route restricting portion 14 is formed and arranged so as not to protrude from the end surface of the outer peripheral wall 11 on the side of the second working opening 10c.

The path restricting portion 14 shown here has a fixed end portion 14a protruding from the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11, and a wire diameter of the second shielded wire We2 on the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11. A free end portion 14b arranged to face each other with the above spacing, and a connecting portion 14c to which the fixed end portion 14a and the free end portion 14b are connected and arranged to face each other with a second notch 12b. , (FIGS. 6, 8 and 9).

In the housing 10, the gap between the free end portion 14b of the route restricting portion 14 and the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11 serves as an insertion port for the second shielded electric wire We2, and is inserted from this insertion port. The pair of second shielded electric wires We2 and We2 are accommodated in the _second notch 12b from the insertion port 12b1.

The free end portion 14b shown here is raised from the connecting portion 14c to the side of the first working opening 10b, and the second shielded electric wire We2 to the insertion port side between the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11 is raised. Lock the movement of.

The connecting portion 14c is a portion for locking the pair of second shielded electric wires We2 and We2 so as not to protrude from the insertion port 12b1 of the _second notch 12b, and is a second portion where the protrusion can be suppressed. The notches 12b are spaced apart from each other and placed opposite to each other.

Since the routes of the pair of second shielded electric wires We2 and We2 are regulated by such a route restricting unit 14, when the case body 10A is fixed to the floor panel of the vehicle body BD, the space between the case body 10A and the floor panel is used. It will not be bitten by the wire and will not interfere with the floor panel after it is fixed. In particular, the pair of second shielded electric wires We2 and We2 shown here have a first working opening 10b inside the housing 10 (accommodation chamber 10a) and outside the housing 10 with the second notch 12b as a boundary. It is launched to the side. Therefore, the pair of second shielded electric wires We2 and We2 each form a U-shape with the location of the second notch 12b as a break point. Therefore, the pair of second shielded electric wires We2 and We2 have their own wiring path with the second notch 12b as a boundary and the route regulation unit 14, and the insertion port 12b ₁ of the second notch 12b is combined. It is possible to enhance the effect of deterring detachment from the body. Therefore, the pair of second shielded electric wires We2 and We2 can enhance the effect of suppressing biting when fixing the case body 10A to the floor panel of the vehicle body BD, and suppress interference with the floor panel after the fixing. The effect can be enhanced.

Further, since the path restricting portion 14 is made of metal integrally molded with the case body 10A and has high rigidity, for example, when a force is received from the pulled second shielded electric wire We2. It has a high load-bearing strength and is excellent in durability.

Furthermore, the route restricting unit 14 can accommodate the second shielded electric wire We2 in the second notch 12b simply by inserting the second shielded electric wire We2 from the insertion port on the free end portion 14b side. Does not require much force for containment. Therefore, the route regulating unit 14 is excellent in workability when the second shielded electric wire We2 is accommodated in the second notch 12b.

Furthermore, the route restricting unit 14 has a shape that can be formed by a molding mold when forming the case body 10A, and it is possible to suppress an increase in cost. The shape of the case body 10A is determined so that the path restricting portion 14 can be formed by a molding die corresponding to the case body 10A.

Furthermore, the route regulation unit 14 does not require strict tolerance management as compared with parts such as conventional clips that regulate the route and position by sandwiching or grasping the second shielded electric wire We2. From this point as well, it is possible to suppress soaring costs.

Further, the route restricting portion 14 has the narrowest distance between the free end portion 14b and the connecting portion 14c between the outer peripheral wall 11 and the second notch 12b at the free end portion 14b. The route regulating unit 14 can regulate the route of the second shielded electric wire We2 having various wire diameters by adjusting the interval of the insertion port on the free end portion 14b side while maintaining the relationship of the spacing. ..

Furthermore, the route restricting portion 14 adjusts the distance between the connecting portion 14c and the peripheral edge of the second notch 12b, and the tension of the second shielded electric wire We2 (so to speak, the return force due to the bending of the U-shape). ) May be used to lock the second shielded electric wire We2 at the peripheral edge of the connecting portion 14c and the second notch 12b. As a result, the route restricting portion 14 can suppress the misalignment of the second shielded electric wire We2 in the second notch 12b, so that the second shielded electric wire We2 can be prevented from coming off from the insertion port on the free end portion 14b side. It can be suppressed. The path restricting portion 14 can lock the movement of the second shielded electric wire We2 toward the insertion port side by the tension of the second shielded electric wire We2 and the rising shape of the free end portion 14b.

The route restricting portion 14 shown here is projected from the inner wall surface 11a of the outer peripheral wall 11 and is arranged so as to face the inner wall surface 11a of the outer peripheral wall 11 and the second notch 12b at intervals.

By the way, when the electric wire holder 55 is not used, the route restricting unit 14 is for restricting the route of the pair of first shielded electric wires We1 and We1 passing through the first notch 12a, and is the first on the outer peripheral wall 11. It may also be provided at the end on the work opening 10b side. The route restricting portion 14 projects from the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11 of the case body 10A, and has a space between the inner wall surface 11a or the outer wall surface 11b and the first notch 12a of the outer peripheral wall 11. The pair of first shielded electric wires We1 and We1 are prevented from being separated from the insertion port 12a1 in the _first notch 12a, and the pair of first shielded electric wires We1 and We1 are arranged so as to face each other. We1 can be fastened in the first notch 12a. Therefore, the pair of first shielded electric wires We1 and We1 are not bitten between the case body 10A and the cover 10B when the cover 10B is assembled to the case body 10A by the path restricting unit 14, and after fixing the cover 10B. It does not interfere with the cover 10B of.

Further, in the outer peripheral wall 11 of the case body 10A, the first notch 12a and the second notch 12b may be integrated at the end on the side of the first working opening 10b or the end on the side of the second working opening 10c. good. Further, in the outer peripheral wall 11, if the first shielded electric wire We1 is not connected to the secondary battery, the first notch 12a and the second notch 12b are provided at the end on the side of the first working opening 10b. , The first notch 12a and the second notch 12b may be provided at the end of the second working opening 10c side. In any case, the route regulation unit 14 is provided for each first notch 12a and every second notch 12b.

The electric connector 20 has a core wire of the first shielded electric wire We1 on the first connection object side and a core wire of the second shielded electric wire We2 on the second connection object side drawn into the accommodation chamber 10a from the outside of the housing 10. Each is electrically connected, and the core wires are electrically connected to each other. Therefore, the electrical connector 20 is arranged in the accommodation chamber 10a of the housing 10 and fixed to the housing 10.

The electric connector 20 electrically connects the core wire of one of the first shielded electric wires We1 in the pair of first shielded electric wires We1 and We1, and also connects the core wire of one of the second shielded electric wires We2 in the pair of second shielded electric wires We2 and We2. A first bus bar 21 to which a core wire is electrically connected is provided (FIG. 10). The main portion of the first bus bar 21 is made of a metal material and is formed into a plate shape.

Further, the electrical connector 20 electrically connects the core wire of the other first shielded electric wire We1 in the pair of first shielded electric wires We1 and We1, and the other second shielded electric wire in the pair of second shielded electric wires We2 and We2. A second bus bar 22 to which the core wire of We2 is electrically connected is provided (FIG. 10). The main portion of the second bus bar 22 is made of a metal material and is formed into a plate shape.

Further, the electrical connector 20 physically and electrically connects the first terminal portion 23a to the first bus bar 21, and is interposed between the first bus bar 21 and one of the second shielded electric wires We2. The fuse 23 is provided (FIG. 10). The electrical connector 20 includes a third bus bar 24 in which the second terminal portion 23b of the fuse 23 is physically and electrically connected and the core wire of one of the second shielded electric wires We2 is electrically connected. (Fig. 10). The main portion of the third bus bar 24 is made of a metal material and is formed into a plate shape. The fuse 23 and the third bus bar 24 are provided for each of the second shielded electric wires We2.

Further, in this electrical connector 20, the male screw member 25A for screwing and fixing the first terminal portion 23a of the fuse 23 to the first bus bar 21 and the second terminal portion 23b of the fuse 23 are screwed to the third bus bar 24. A male screw member 25B for fixing and fixing is provided. The electrical connector 20 includes a female screw member 26 that is screwed into the male screw members 25A and 25B, respectively (FIG. 10).

Further, the electrical connector 20 is an insulating bus bar holding member integrally molded with the first bus bar 21, the second bus bar 22, and the third bus bar 24, and also integrally molded with the male screw members 25A and 25B. 27 is provided (FIGS. 4, 5 and 10). The bus bar holding member 27 is formed of an insulating material such as synthetic resin. The bus bar holding member 27 exposes the fuse connection portions 21a, 22a, 24a of the first bus bar 21, the second bus bar 22, and the third bus bar 24 on the side of the first working opening 10b (FIG. 10). The male screw members 25A and 25B are projected toward the opening 10b for the first work. The electric connector 20 is assembled to the bus bar holding member 27, and includes a cover member 28 that covers the fuse connecting portions 21a, 22a, 24a and the male screw members 25A, 25B from the first working opening 10b side (FIGS. 4 and 4). 5). The cover member 28 is molded of an insulating material such as synthetic resin.

The electrical connector 20 is fixed to the housing 10. The electrical connector 20 shown here is fixed to the housing 10 by screwing and fixing the bus bar holding member 27 to the case body 10A. The accommodation chamber 10a of the case body 10A is provided with a fixing portion 15 having a female screw portion N3 protruding from the inner wall surface 11a of the outer peripheral wall 11 (FIGS. 4, 6 and 7). The bus bar holding member 27 is screwed and fixed to the fixing portion 15 by screwing the male screw member B3 into the female screw portion N3.

Here, the electrical connection tool 20 is a space from the electrical connection tool 20 to the opening 10b for the first work, and from the first storage chamber 10a ₁ in which the parts to be assembled in this space are housed and the electrical connection tool 20. It is a space up to the second working opening 10c, and has a second storage chamber 10a ₂ in which parts to be assembled in this space are housed (FIG. 3). The accommodation chamber 10a is roughly classified into a first accommodation chamber 10a ₁ and a second accommodation chamber 10a ₂ by the electrical connection tool 20.

The first storage chamber 10a ₁ is a room in which, for example, the parts to be assembled in this space are accommodated from the first work opening 10b, and the parts assembly work is performed from the first work opening 10b with the operator's fingers or tools. Is. Therefore, the first working opening 10b is for performing the insertion work when accommodating the part in the first accommodating chamber 10a ₁ and the assembling work when assembling this part in the first accommodating chamber 10a ₁ . It can be used as a work opening. In the first accommodation chamber 10a ₁ shown here, for example, the first shielded electric wire We1 with the connector 51 is inserted from the first working opening 10b, and the connector 51 is inserted into the following first connector portion 28a or second connector portion 28b. The first shielded electric wire We1 is electrically connected to the electrical connector 20 by fitting and connecting to.

Further, in the second storage chamber 10a ₂ , for example, the parts to be assembled in this space are accommodated from the second work opening 10c, and the parts assembly work is performed from the second work opening 10c with the operator's fingers or tools. It is a room to let you. Therefore, the second working opening 10c is for performing the insertion work when accommodating the part in the second accommodating chamber 10a ₂ and the assembling operation when assembling this part in the second accommodating chamber 10a ₂ . It can be used as a work opening. In the second accommodation chamber 10a ₂ shown here, for example, a second shielded electric wire We2 with a connector 52 is inserted from the second working opening 10c, and the connector 52 is inserted into the following first connector portion 27a or second connector portion 27b. The second shielded electric wire We2 is electrically connected to the electrical connector 20 by fitting and connecting to.

In the electrical connector 20, the cover member 28 is formed with a first connector portion 28a and a second connector portion 28b protruding toward the first working opening 10b side (that is, the first accommodation chamber 10a ₁ ). (Fig. 3 and Fig. 4). In the first connector portion 28a, the connector 51 of one of the first shielded electric wires We1 is fitted and connected, so that the core wire of the one first shielded electric wire We1 is electrically connected to the terminal portion of the inner first bus bar 21. .. Further, in the second connector portion 28b, the connector 51 of the other first shielded electric wire We1 is fitted and connected, so that the core wire of the other first shielded electric wire We1 is electrically connected to the terminal portion of the inner second bus bar 22. Connect.

Further, in the electrical connector 20, the first connector portion 27a and the second connector portion 27b protruding toward the second working opening 10c side (that is, the second accommodation chamber 10a ₂ ) are formed on the bus bar holding member 27. (Fig. 3 and Fig. 5). In the first connector portion 27a, the connector 52 of the one second shielded electric wire We2 is fitted and connected, so that the core wire of the one second shielded electric wire We2 is electrically connected to the terminal portion of the inner third bus bar 24. .. The first connector portion 27a is provided for each of the second shielded electric wires We2 on one side. Further, in the second connector portion 27b, the connector 52 of the other second shielded electric wire We2 is fitted and connected, so that the core wire of the other second shielded electric wire We2 is electrically connected to the terminal portion of the inner second bus bar 22. Connect. The second connector portion 27b is provided for each of the other second shielded electric wires We2.

In the electrical connection box 1, for example, the case main body 10A can be fixed to the floor panel of the vehicle body BD by performing the parts assembly work in the second storage chamber 10a ₂ in advance. Then, in the electrical connection box 1, the cover 10B can be assembled to the case body 10A by performing the parts assembly work in the _first storage chamber 10a1 in the next step. As described above, in the electrical connection box 1, the parts assembly work in the first storage chamber 10a ₁ and the second storage chamber 10a ₂ can be divided into each process, so that the range of the assembly work is widened and the assembly work is widened. It is possible to improve the workability.

The terminal fitting 30 is made of a metal material. The terminal fitting 30 is physically and electrically connected to the braided body of the second shielded electric wire We2, and is fixed to the metal housing 10 so that noise on the braided body can be removed from the housing. Let it escape from 10 to the body BD. Therefore, the terminal fitting 30 is attached to the electrical connection portion 31 to which the braided body of the second shielded electric wire We2 is physically and electrically connected, and the outer wall surface 11b of the outer peripheral wall 11 of the case body 10A in the housing 10. It has a fixed fixed portion 32 (FIGS. 1 and 2).

Specifically, the electrical connection portion 31 is a tubular shape in which the outer coating is partially stripped off or stripped over the entire circumference to be physically and electrically connected to the exposed braided body. It is the part of. The electrical connection portion 31 shown here arranges the exposed braid in a cylinder, and physically and electrically connects the inner peripheral wall of the cylinder to the exposed braid. For example, the electrical connection portion 31 has a one-piece shape before being connected to the braided body, and the tubular body thereof is crimped while being wound around the exposed braided body from the outside. The inner peripheral wall is physically and electrically connected to the braid.

The fixing portion 32 is formed as a flat plate-shaped piece, and a circular through hole 32a is formed (FIG. 2).

The terminal fitting 30 shown here is molded as a flag terminal. The flag terminal is a terminal in which two electrical connection portions 31 having the same cylinder axis direction are arranged in parallel, and a fixing portion 32 is offset-arranged with respect to an aggregate of these two electrical connection portions 31. Is.

The fastening structure 40 fixes the fixing portion 32 of the terminal fitting 30 to the outer wall surface 11b of the outer peripheral wall 11. For example, the fastening structure 40 includes a female screw portion formed on the outer peripheral wall 11 and a male screw member for screwing the male screw portion to the female screw portion, or the outer wall surface 11b with respect to the outer peripheral wall 11. It is configured to include a male screw member protruding from the male screw member and a female screw member for screwing the female screw portion into the male screw portion of the male screw member. The fastening structure 40 shown here is configured to include a female screw portion 41a formed on the outer peripheral wall 11 and a male screw member 42 for screwing the male screw portion 42a into the female screw portion 41a (the female screw portion 41a). Figure 2). In this fastening structure 40, the male screw portion 42a of the male screw member 42 is inserted into the through hole 32a of the fixing portion 32 and then screwed into the female screw portion 41a.

The female screw portion 41a may be formed directly on the outer peripheral wall 11, and may be provided on the inner wall surface 11a or the outer wall surface 11b of the outer peripheral wall 11 in a protruding state, and the boss portion or the inner wall surface 11a of the outer peripheral wall 11 and the outer surface. It may be formed on a boss portion provided on the wall surface 11b in a protruding state. The female screw portion 41a shown here is formed in a columnar boss portion 41A provided on the outer wall surface 11b of the outer peripheral wall 11 in a protruding state (FIGS. 2 and 4). The boss portion 41A is for fixing the first terminal fitting 30A, which will be described later, and is formed as a cylindrical body whose axial direction is orthogonal to the smooth outer wall surface 11b, and is a female whose axial direction is a screw axis. The screw portion 41a is formed. Therefore, the fixing portion 32 of the first terminal fitting 30A is fixed to the outer peripheral wall 11 via the boss portion 41A, and the planes are arranged parallel to the outer wall surface 11b of the outer peripheral wall 11. .. Further, the female screw portion 41a shown here is also formed on a columnar boss portion 41B provided on the inner wall surface 11a and the outer wall surface 11b of the outer peripheral wall 11 in a protruding state (FIGS. 2 and 4). The boss portion 41B is for fixing the second terminal fitting 30B, which will be described later, and is formed as a cylindrical body whose axial direction is orthogonal to the smooth inner wall surface 11a and the outer wall surface 11b. A female screw portion 41a serving as a screw shaft is formed. Therefore, the fixing portion 32 of the second terminal fitting 30B is fixed to the outer peripheral wall 11 via the boss portion 41B, and the planes are arranged parallel to the outer wall surface 11b of the outer peripheral wall 11. ..

The outer peripheral wall 11 is provided with a terminal locking portion 16 which is a projecting body protruding from the outer wall surface 11b and suppresses relative rotation of the female screw portion 41a and the male screw portion 42a of the terminal fitting 30 around the axis. (Fig. 1, Fig. 2, Fig. 4 and Fig. 5). The terminal locking portion 16 has a design value of the fixed posture of the terminal fitting 30 with respect to the outer peripheral wall 11 when the terminal fitting 30 rotates relative to the axis of the female screw portion 41a and the male screw portion 42a with respect to the outer peripheral wall 11. In order to keep the posture of, the relative rotation of the terminal fitting 30 is locked. For example, in the terminal locking portion 16, when the rotational torque for screwing and fixing the terminal fitting 30 to the outer peripheral wall 11 acts on the terminal fitting 30, the fixed posture of the terminal fitting 30 is the posture of the design value. The relative rotation of the terminal fitting 30 is locked so that the terminal fitting 30 can be kept as it is. The terminal locking portions 16 are provided at least two places for each terminal fitting 30.

The terminal fitting 30 is provided for each pair of second shielded electric wires We2 and We2. Therefore, the electrical connection box 1 is provided with a plurality of terminal fittings 30. The terminal fitting 30 has an electrical connection portion 31 for each braid of the pair of second shielded electric wires We2 and We2.

Here, in the electrical connection box 1, the following first terminal fittings 30A and second terminal fittings 30B are provided as the terminal fittings 30 (FIGS. 1 and 2).

In the first terminal fitting 30A, two electrical connection portions 31 are arranged so that the directions of the cylinder axes of the two electrical connection portions 31 are aligned with each other in the plane direction of the plane of the fixing portion 32. The first terminal fitting 30A is formed and fixed so that its two electrical connection portions 31 are arranged on the outer peripheral wall 11 side of the fixing portion 32. Further, the first terminal fitting 30A is arranged so that the tubular shafts of the two electrical connection portions 31 are arranged along the surface direction of the outer wall surface 11b of the outer peripheral wall 11.

In the first terminal fitting 30A shown here, one opening of the two electrical connection portions 31 faces the first working opening 10b side and the other opening faces the second working opening 10c side (that is, 2). The fixing portion 32 is fixed to the boss portion 41A so that the respective cylinder shafts of the two electrical connection portions 31 face the same direction as the cylinder shaft of the outer peripheral wall 11. Therefore, when the pair of second shielded electric wires We2 and We2 are arranged from the side of the first connection object, one of the pair of second shielded electric wires We2 in each electric connection portion 31 of the first terminal fitting 30A fixed to the housing 10. The cables are arranged from the side of the first working opening 10b to the opening along the outer wall surface 11b of the outer peripheral wall 11. The pair of second shielded electric wires We2 and We2 up to this one opening are, for example, bundled together by tape winding or housed in a cylindrical exterior body. Subsequently, the pair of second shielded electric wires We2 and We2 are pulled out from the other opening in the respective electrical connection portions 31 of the first terminal fitting 30A, and are drawn from the second notch 12b to the second accommodating chamber 10a ₂ . The route is regulated by the route regulating unit 14 which is drawn inside and paired with the second notch 12b. Regarding the pair of second shielded electric wires We2 and We2 drawn into the second accommodation chamber 10a ₂ , the connectors 52 of the respective terminals are connected to the first connector portion 27a and the second connector portion 27b of the electrical connector 20. Each is fitted and connected.

On the other hand, in the second terminal fitting 30B, the two electrical connection portions 31 are arranged so that the directions of the cylinder axes of the two electrical connection portions 31 are aligned with each other in the direction orthogonal to the plane of the fixing portion 32. The second terminal fitting 30B is formed and fixed so that its two electrical connection portions 31 are arranged so as to project from the fixing portion 32 on the side opposite to the outer peripheral wall 11. Further, the second terminal fitting 30B is arranged so that the tubular shafts of the two electrical connection portions 31 are arranged along the surface direction of the outer wall surface 11b of the outer peripheral wall 11.

In the second terminal fitting 30B shown here, one opening of the two electrical connection portions 31 faces the first working opening 10b side and the other opening faces the second working opening 10c side (that is, 2). The fixing portion 32 is fixed to the boss portion 41B so that the respective cylinder shafts of the two electrical connection portions 31 face the same direction as the cylinder shaft of the outer peripheral wall 11. Therefore, when the pair of second shielded electric wires We2 and We2 are arranged from the side of the first connection object, one of the pair of second shielded electric wires We2 in each of the electric connection portions 31 of the second terminal fitting 30B fixed to the housing 10. The cables are arranged from the side of the first working opening 10b to the opening along the outer wall surface 11b of the outer peripheral wall 11. Similar to the first terminal fitting 30A side, the pair of second shielded electric wires We2 and We2 up to this one opening may be bundled together by tape winding or housed in a cylindrical exterior body, for example. is doing. Subsequently, the pair of second shielded electric wires We2 and We2 are pulled out from the other opening in the respective electrical connection portions 31 of the second terminal fitting 30B, and are drawn from the second notch 12b to the second accommodating chamber 10a ₂ . The route is regulated by the route regulating unit 14 which is drawn inside and paired with the second notch 12b. Regarding the pair of second shielded electric wires We2 and We2 drawn into the second accommodation chamber 10a ₂ , the connectors 52 of the respective terminals are connected to the first connector portion 27a and the second connector portion 27b of the electrical connector 20. Each is fitted and connected.

As shown above, in the electrical connection box 1 of the present embodiment, the terminal fitting 30 is fixed to the outer wall surface 11b of the outer peripheral wall 11 of the housing 10 outside the housing 10. Therefore, in the electrical connection box 1, the volume of the storage chamber 10a of the housing 10 can be reduced, so that the housing 10 can be downsized, and the weight of the housing 10 can be reduced accordingly. It will be possible. Therefore, the electric connection box 1 of the present embodiment can be reduced in weight. Therefore, the electrical connection box 1 can improve the fuel efficiency or the electricity cost of the vehicle, and can improve the environmental performance (for example, emission performance) of the vehicle.

Here, in the conventional electric junction box, a tool is inserted from the work opening of the housing along the outer peripheral wall, and the terminal fitting is screwed and fixed in the accommodation chamber of the housing, so that the work space is reduced. In order to secure it, it is necessary to expand the accommodation chamber in the direction orthogonal to the insertion direction (that is, the screw axis direction) of the tool. Further, in the conventional electric junction box, it is necessary to make the plane of the one-sided fixing portion of the terminal fitting orthogonal to the tool insertion direction (screw axis direction), so in order to secure the accommodation space for the terminal fitting. , It is necessary to expand the accommodation chamber in the direction orthogonal to the insertion direction (screw axis direction) of the tool. On the other hand, in the electric connection box 1 of the present embodiment, the flat surface of the fixing portion 32 is made parallel to the outer wall surface 11b of the outer peripheral wall 11, and the terminal fitting 30 is fixed to the outer peripheral wall 11. It is not necessary to provide a work space for fixing the terminal fitting 30 with screws in the accommodation chamber 10a, and the amount of protrusion of the terminal fitting 30 as seen from the outer wall surface 11b of the outer peripheral wall 11 can be suppressed as compared with the conventional case. Therefore, the electrical connection box 1 of the present embodiment can be miniaturized as a whole in combination with the miniaturization of the housing 10. Therefore, the electrical connection box 1 can be mounted on a vehicle.

Further, the cost of the electrical connection box 1 of the present embodiment can be reduced by reducing the amount of raw materials used due to the miniaturization and weight reduction of the housing 10. Further, in the electrical connection box 1 of the present embodiment, the housing 10 is formed by using a mold as in the conventional case, and the female screw portion 41a provided in the housing 10 is also formed by post-processing by cutting. To. Therefore, the electrical connection box 1 can suppress an increase in processing cost when the housing 10 is produced.

Further, the wire harness WH of the present embodiment is provided with such an electric connection box 1, and the effect obtained by the electric connection box 1 can be similarly exhibited.

By the way, in recent years, when a rotating machine is used as a drive source in a vehicle such as a hybrid vehicle or an electric vehicle, for example, the rotating machine, an inverter, a secondary battery or the like is installed under the floor panel of the vehicle body BD. Parts related to these may be installed on the floor panel. Further, in recent years, more parts have been installed in vehicles due to the installation of advanced driver assistance systems and the like. Therefore, in the future vehicles, in order to mount a wide variety of parts, it is required to reduce the size of the parts in the vehicle front-rear direction and the vehicle width direction.

In the electrical connection box 1 and the wire harness WH of the present embodiment, the space surrounded by the cylindrical outer peripheral wall 11 is used as the accommodation chamber 10a of the housing 10, and both ends of the outer peripheral wall 11 in the cylindrical axial direction are opened. I'm letting you. The storage chamber 10a is a space from the electrical connector 20 to the opening at one end (first working opening 10b), and is electrically connected to the first storage chamber 10a ₁ in which the parts to be assembled in this space are housed. It is a space from the tool 20 to the opening at the other end (opening 10c for the second work), and has a second storage chamber 10a ₂ in which parts to be assembled in this space are housed. Therefore, the electric junction box 1 and the wire harness WH are arranged in a direction orthogonal to the tubular axis direction of the outer peripheral wall 11 as compared with the conventional one in which the parts are housed and assembled in one room from one opening of the housing. The size of the housing 10 can be reduced. Therefore, the electrical connection box 1 and the wire harness WH of the present embodiment can be miniaturized as a whole, so that the mountability on a vehicle can be improved. In particular, in the electric connection box 1 and the wire harness WH of the present embodiment, since the housing 10 is assembled to the vehicle body by aligning the cylinder axis direction of the outer peripheral wall 11 with the vehicle vertical direction, the housing in the vehicle front-rear direction and the vehicle width direction. The body 10 can be miniaturized, which is useful from the viewpoint of mountability on vehicles in the future.

Further, in the electric connection box 1 and the wire harness WH of the present embodiment, the weight of the housing 10 can be reduced due to the miniaturization of the housing 10. Then, in the electrical connection box 1 and the wire harness WH, the storage chamber 10a is divided into the first storage chamber 10a ₁ and the second storage chamber 10a ₂ in the tubular axial direction of the outer peripheral wall 11 with the electrical connection tool 20 as a boundary. Since they are separated, it is possible to reduce the weight of the electric connector 20 as the size of the electric connection tool 20 is reduced. Therefore, the electric connection box 1 and the wire harness WH of the present embodiment can be further reduced in weight, and accordingly, the fuel consumption or the electric cost of the vehicle can be further improved, and the environmental performance of the vehicle ( For example, emission performance) can be further improved. The electric connection box 1 and the wire harness WH of the present embodiment are designed to further reduce the size and weight of the electric connection tool 20 while further reducing the amount of raw materials used due to the miniaturization and weight reduction of the housing 10. Since the amount of raw materials used can be reduced, the cost can be further reduced.

Further, in the electrical connection box 1 and the wire harness WH of the present embodiment, the accommodation chamber 10a is dispersed in the first accommodation chamber 10a ₁ and the second accommodation chamber 10a ₂ , so that the accommodation chamber 10a and the first accommodation chamber 10a ₁ are dispersed. There is a possibility that the workability of assembling the parts of any one of the second accommodation chambers 10a ₂ will be deteriorated. However, in the electrical connection box 1 and the wire harness WH, the route regulation unit 14 can regulate the route of the electric wire (the second shielded electric wire We2 in the specific example here) that may be an obstacle in the assembling work. Therefore, it is possible to suppress a decrease in assembly workability. Then, in the electric connection box 1 and the wire harness WH, after the assembling work, the route regulating unit 14 can take measures against the interference of the electric wires.

Further, the electric connection box 1 and the wire harness WH of the present embodiment, together with the effect of the arrangement of the terminal fittings 30 shown above, can be further miniaturized as a whole due to the further miniaturization of the housing 10. It is possible to further improve the mountability on the vehicle.

1 Electrical connection box 10 Housing 10a Storage room 11 Outer wall 11b Outer wall surface 20 Electrical connection tool 21 1st bus bar 22 2nd bus bar 30 Terminal metal fittings 30A 1st terminal metal fittings 30B 2nd terminal metal fittings 31 Electrical connection part 32 Fixed part 40 Fastening Structure BD Body We1 1st shielded wire We2 2nd shielded wire WH wire harness

Claims (5)

A metal housing that has a containment chamber surrounded by an outer wall and is fixed to a conductive vehicle body.
The core wire of the first shielded electric wire on the first connection object side and the core wire of the second shielded electric wire on the second connection object side, which are arranged in the accommodation chamber and are drawn into the accommodation chamber from the outside of the housing. And a conductive electric connector in which the core wires are electrically connected to each other.
An electrical connection portion to which the braided body of the second shielded electric wire is physically and electrically connected, and a terminal fitting having a fixing portion fixed to the outer wall surface of the outer peripheral wall.
A fastening structure in which the fixing portion of the terminal fitting is fixed to the outer wall surface of the outer peripheral wall.
An electrical junction box characterized by being equipped with. The electric connector electrically connects the core wire of one of the first shielded electric wires in the pair of the first shielded electric wires electrically connected to the secondary battery as the first connection object, and the second. In the pair of the second shielded electric wires electrically connected to the power distribution object as the connection object, the first bus bar in which the core wire of the second shielded electric wire is electrically connected, and the pair of first shielded electric wires. It is provided with a second bus bar in which the core wire of the other first shielded electric wire is electrically connected and the core wire of the other second shielded electric wire in the pair of second shielded electric wires is electrically connected.
The electrical connection box according to claim 1, wherein the terminal fitting has the electrical connection portion for each of the braided bodies of the pair of second shielded electric wires. The electrical connection box according to claim 1 or 2, wherein the terminal fitting is a flag terminal. The electrical connection box according to claim 1, 2, or 3, wherein a plurality of the terminal fittings are provided. The first shielded wire on the first connection object side and
The second shielded wire on the second connection object side and
A metal housing that has a containment chamber surrounded by an outer wall and is fixed to a conductive vehicle body.
The core wire of the first shielded electric wire and the core wire of the second shielded electric wire, which are arranged in the accommodation chamber and are drawn into the accommodation chamber from the outside of the housing, are electrically connected to each other, and the core wires are electrically connected to each other. With the connected conductive electrical connection
An electrical connection portion to which the braided body of the second shielded electric wire is physically and electrically connected, and a terminal fitting having a fixing portion fixed to the outer wall surface of the outer peripheral wall.
A fastening structure in which the fixing portion of the terminal fitting is fixed to the outer wall surface of the outer peripheral wall.
A wire harness characterized by being equipped with.

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