JP2023074585A - Electric connection box and wiring harness - Google Patents

Abstract

To prevent an increase in the size of a figure.SOLUTION: An electric connection box has: a metal housing 10 that has a storage chamber 10a and is fixed to a conductive vehicle body; an electric connection tool 20 that electrically connects core wires of first shield wires We1 on the side of a first connection object and core wires of second shield wires We2 on the side of a second connection object, which are led into the storage chamber from the outside of the housing; and a terminal fitting 30 that has electric connection parts 31 to which braided bodies of the second shield wires are physically and electrically connected. The housing includes a case body 10A having the storage chamber surrounded by a cylindrical outer peripheral wall 11 and an opening 10b inside an annular end at one end of the outer peripheral wall, and a cover 10B that covers the opening at one end. The case body has a flange part 16 that is annularly projected from the annular end to the outside. The terminal fitting has a part to be fixed 32 that places the second shield wires on a flat surface of the flange part to be fixed to the surface so that the wires are led into the storage chamber from the outside of the housing through the electric connection parts.SELECTED DRAWING: Figure 2

Description

The present invention relates to electrical connection boxes and wire harnesses.

Conventionally, in a vehicle, for example, it is interposed between a secondary battery and a plurality of power supply objects, and power is distributed to each power supply object. An electrical connection box is installed to electrically connect the electric wires of the housing. Various parts such as parts for electrical connection of the respective electric wires and parts arranged on the electric circuit (relays, fuses, etc.) are accommodated in the housing chamber inside the housing. Furthermore, in this electrical junction box, there is known one in which the casing is molded from a metal material in order to suppress the intrusion of noise into the storage chamber. For example, Patent Document 1 below discloses an electric connection box of this type. Such an electrical connection box constitutes a wire harness together with a plurality of electric wires drawn into the storage chamber from the side of the first connection object and the side of the second connection object.

JP 2014-93888 A

By the way, in an electrical connection box, a shielded wire is drawn into a housing chamber of a metal housing from the side of the first connection object or the side of the second connection object, and the braided body of the shielded wire is connected to the terminal fitting in the housing chamber. It is known that the braided body is fixed to the housing via the wire so that the noise on the braided body is released from the housing to the vehicle body. In the electric junction box with such noise countermeasures, not only the storage space for the various parts placed in the storage chamber and the installation/removal work space, but also the storage space for the terminal fittings for noise elimination and the installation/removal work space. Must be secured in containment room. For this reason, the conventional electrical connection box requires a housing with a large volume of the storage chamber, and the increase in the size of the housing may lead to an increase in the size of the entire body.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an electric junction box that can suppress an increase in size.

In order to achieve the above object, the electrical connection box according to the present invention includes a metal housing having a housing chamber and fixed to a conductive vehicle body, and a metal housing which is drawn into the housing chamber from outside the housing. an electrical connector for electrically connecting the core wire of the first shielded wire on the side of the first connection object and the core wire of the second shielded wire on the side of the second connection object, and the braided body of the second shielded wire is physically and a terminal fitting having an electrical connection portion to be electrically connected, wherein the housing includes the housing chamber surrounded by a cylindrical outer peripheral wall and an opening inside an annular end portion at one end of the outer peripheral wall. and a cover that covers the opening at the one end, the case body has a flange portion annularly protruding outward from the annular end portion, and the terminal fitting includes the second (2) a fixed portion that is placed on and fixed to the plane of the flange portion so that the shielded wire is pulled into the housing chamber from the outside of the housing through the electrical connection portion;

In order to achieve the above object, a wire harness according to the present invention has a first shielded wire on the side of a first connection object, a second shielded wire on the side of a second connection object, and a storage chamber, and an electrical connection between a metal casing fixed to a conductive vehicle body, and a core wire of the first shielded wire and a core wire of the second shielded wire drawn from the outside of the casing into the housing chamber; and a terminal fitting having an electrical connection portion to which the braided body of the second shielded wire is physically and electrically connected, wherein the housing is surrounded by a cylindrical outer wall. A case body having an opening inside an annular end at one end of the chamber and the outer peripheral wall; and a cover covering the opening at the one end, wherein the case body annularly protrudes outward from the annular end. and the terminal fitting is placed and fixed on the plane of the flange portion so that the second shielded wire is pulled into the housing chamber from the outside of the housing via the electrical connection portion. It is characterized by having a fixed portion.

In the electric connection box according to the present invention, the terminal fittings are assembled to the flange portion of the case body outside the accommodation chamber, so the work of assembling the terminal fittings inside the accommodation chamber becomes unnecessary. Therefore, in this electrical junction box, it is not necessary to provide a working space for assembling the terminal fittings in the housing chamber, so that the housing chamber can be made compact, and the size of the case main body can be suppressed. Therefore, the electric connection box according to the present invention can suppress the increase in size of the housing and the increase in the size of the entire body. Moreover, the wire harness according to the present invention is equipped with such an electric junction box, and can similarly exhibit the effects of this electric junction box.

FIG. 1 is a perspective view showing an electric connection box and a wire harness according to the embodiment. FIG. 2 is an exploded perspective view partially disassembling the electric connection box and the wire harness of the embodiment. FIG. 3 is an explanatory diagram schematically showing and explaining the electric junction 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 a perspective view showing the electrical connector with the cover member removed.

EMBODIMENT OF THE INVENTION Below, embodiment of the electric junction box and wire harness which concern on this invention is described in detail based on drawing. In addition, this invention is not limited by this embodiment.

[Embodiment]
One of the embodiments of the electrical connection box and wire harness according to the present invention will be described with reference to FIGS. 1 to 5. FIG.

Reference numeral 1 in FIGS. 1 to 3 indicates an electrical junction box of this embodiment. Reference numeral WH in FIGS. 1 to 3 indicates a wire harness of the present embodiment provided with the electric connection box 1. As shown in FIG.

The electrical connection box 1 is interposed between a first connection object (not shown) and a second connection object (not shown), and the first electric wire We1 on the side of the first connection object and the second connection object 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. At least one first electric wire We1 and at least one second electric wire We2 are used in the electric connection box 1 and the wire harness WH. For example, the electrical connection box 1 and the wire harness WH shown here use shielded wires for the first wires We1 and the second wires We2, respectively, to prevent noise from entering from the outside. Therefore, in the following description, the electric connection box 1 and the wire harness WH are described as including 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. conduct.

Although not shown, the first shielded wire We1 includes a cylindrical conductive core wire, a cylindrical insulating inner coating (inner sheath) that concentrically covers the core wire, and a cylindrical inner coating that concentrically covers the inner coating. It comprises an electrically conductive braid and a cylindrical insulating outer covering (outer sheath) concentrically surrounding the braid. The second shielded wire We2 includes, although not shown, a cylindrical conductive core wire, a cylindrical insulating inner sheath (inner sheath) that concentrically covers the core wire, and a cylindrical sheath that concentrically covers the inner sheath. a cylindrical electrically conductive braid and a cylindrical insulating outer sheath (outer sheath) concentrically surrounding the braid.

The electrical junction box 1 and the wire harness WH illustrated here are mounted on a vehicle such as an electric vehicle or a hybrid vehicle, and include a secondary battery as a first connection object and a power distribution object (for example, a second connection object). , supplementary notes, etc. to which power is to be supplied), power is distributed to the power distribution object. Therefore, in the electrical connection box 1 and the wire harness WH illustrated here, a pair of first shielded wires We1, We1 (first shielded wire We1 for positive electrode, first shielded wire We1 for negative electrode) electrically connected to the secondary battery An electric wire We1) and a pair of second shielded electric wires We2, We2 (second shielded electric wire We2 for positive electrode, second shielded electric wire We2 for negative electrode) electrically connected to the power distribution object are used. In addition, in the electric connection box 1 and the wire harness WH illustrated here, a plurality of sets of the pair of second shield electric wires We2, We2 are used.

This electrical connection box 1 has a metal housing 10 (FIGS. 1 to 3). The electrical junction box 1 also includes a conductive electrical connector 20 for electrically connecting the first shielded wire We1 and the second shielded wire We2 inside the housing 10 (FIGS. 2 and 3). The electric junction box 1 also includes a terminal fitting 30 for releasing noise carried on the braided body of the second shield electric wire We2 (FIG. 3).

The housing 10 is made of a metal material such as aluminum or an aluminum alloy and fixed to a conductive vehicle body (not shown). The housing 10 also has a storage chamber 10a (FIGS. 2 to 4). The housing 10 is provided with a working opening 10b for inserting or assembling parts to be placed in the housing chamber 10a (FIGS. 2 to 4).

The storage chamber 10a accommodates an electrical connector 20 that electrically connects the core wire of the first shield wire We1 and the core wire of the second shield wire We2. The electrical connector 20, the first shielded wire We1, and the second shielded wire We2 are inserted into the housing chamber 10a from the working opening 10b.

The housing 10 shown here includes a metal case main body 10A and a metal cover 10B (FIGS. 1 to 3). The housing 10 is fixed to the vehicle body with the work opening 10b facing upward. For example, here, the case body 10A is screwed and fixed to the floor panel of the vehicle body.

The case main body 10A has a cylindrical outer peripheral wall 11 (FIGS. 1 to 4). In the case main body 10A, the inner space surrounded by the outer peripheral wall 11 is used as the storage chamber 10a, and the inner opening of the annular end at one end of the outer peripheral wall 11 in the cylinder axis direction is used for work. It is used as the opening 10b. The case main body 10A also has a bottom wall 12 closing the opening at the other end of the outer peripheral wall 11 (FIGS. 1 to 4). Thus, the case body 10A is surrounded by the outer peripheral wall 11 and the bottom wall 12, and has a working opening 10b at one end of the outer peripheral wall 11 that communicates with the housing chamber 10a.

In the case main body 10A, the electrical connecting device 20 is inserted into the housing chamber 10a through the working opening 10b, and the electrical connecting device 20 is screwed and fixed through the working opening 10b.

The electrical connection tool 20 includes a conductive member that electrically connects the core wire of the first shield wire We1 and the core wire of the second shield wire We2. The electrical connecting device 20 shown here electrically connects the core wire of one of the pair of first shielded wires We1, We1 in the pair of first shielded wires We1, We1, and the pair of second shielded wires We2, We2. A first bus bar 21 for electrically connecting the core wire of one of the second shielded wires We2 to a core wire of the other first shielded wire We1 of the pair of first shielded wires We1, We1, which is electrically connected to the pair of second shields. and a second bus bar 22 for electrically connecting the core wire of the other second shield wire We2 of the wires We2, We2 (FIG. 5). The respective main bodies 21a and 22a of the first busbar 21 and the second busbar 22 are made of a metal material and formed into a plate shape. The first shielded wire We1 is electrically connected to the first busbar 21 or the second busbar 22 via a connector 51 (FIGS. 2 and 3) at one end. Although not shown here, the other end of the first shielded wire We1 is provided with a connector for electrical connection to the first connection object side.

Also, the electrical connection tool 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 shield wires We2. fuse 23 (FIG. 5). The electrical connector 20 serves as another conductive member to physically and electrically connect the second terminal portion 23b of the fuse 23, and to electrically connect the core wire of one of the second shield wires We2. A third bus bar 24 is provided (FIG. 5). A main body 24a of the third bus bar 24 is formed in a plate shape from a metal material. The fuse 23 and the third bus bar 24 are provided for each one of the second shield wires We2. The second shielded wire We2 is electrically connected to the second bus bar 22 or the third bus bar 24 via a connector 52 (FIG. 3) at one end. Although not shown here, the other end of the second shielded wire We2 is provided with a connector for electrical connection to the second connection object side.

Further, the electrical connecting device 20 includes a male screw member 25A for screwing and fixing the first terminal portion 23a of the fuse 23 to the first bus bar 21 and a second terminal portion 23b of the fuse 23 to the third bus bar 24 by screwing. and a male screw member 25B for stopping and fixing. The electrical connecting device 20 is provided with female screw members 26 that are screwed together with the male screw members 25A and 25B (Fig. 5).

In addition, the electrical connector 20 is an electrically insulating insulating member that holds the conductive members (the first bus bar 21, the second bus bar 22, and the third bus bar 24) and is screwed and fixed to the housing 10 in the housing chamber 10a. Prepare. The electrical connecting device 20 includes a holding member (hereinafter referred to as “bus bar holding member") 27 (Figs. 4 and 5). The busbar holding member 27 is molded from an insulating material such as synthetic resin. The busbar holding member 27 shown here is integrally formed with the conductive members (the first busbar 21, the second busbar 22, and the third busbar 24) by insert molding. Further, here, the busbar holding member 27 is also integrally formed with the male screw members 25A and 25B by insert molding.

The busbar holding member 27 exposes the respective main bodies 21a, 22a, and 24a of the first busbar 21, the second busbar 22, and the third busbar 24 on the top surface 27U on the side of the work opening 10b (FIG. 5), and Male screw members 25A and 25B are projected from the top surface 27U toward the work opening 10b. In the first bus bar 21 and the third bus bar 24, the exposed surfaces of the main bodies 21a and 24a are used as fuse connecting portions. The electric connecting device 20 further includes a cover member 28, which is assembled to the busbar holding member 27 and covers the main bodies 21a, 22a, 24a and the male screw members 25A, 25B from the working opening 10b side, as another insulating member (Fig. 2 to Figure 4). The cover member 28 is molded from an insulating material such as synthetic resin.

In the electrical connector 20, the cover member 28 is formed with a first connector portion 28a and a second connector portion 28b that protrude toward the work opening 10b in the housing chamber 10a (FIGS. 3 and 4). The first connector portion 28a electrically connects the core wire of the first shielded wire We1 to the terminal portion of the first busbar 21 on the inner side by fitting and connecting the connector 51 of the first shielded wire We1. . In addition, the second connector portion 28b electrically connects the core wire of the other first shielded wire We1 to the terminal portion of the second bus bar 22 on the inner side by fitting and connecting the connector 51 of the other first shielded wire We1. connect.

In the case main body 10A, the first shielded electric wire We1 is inserted from the work opening 10b into the housing chamber 10a, and the connector 51 at one end of the first shielded electric wire We1 is connected to the first connector of the electrical connector 20 in the housing chamber 10a. It is fitted and connected to the portion 28a or the second connector portion 28b (FIGS. 2 and 3).

The case main body 10A has an end portion of the outer peripheral wall 11 on the work opening 10b side for drawing the pair of first shield wires We1, We1 from the outside of the housing 10 into the housing chamber 10a (in other words, , a notch 13 for pulling out the first shield wires We1, We1 from the housing chamber 10a to the outside of the housing 10 (FIGS. 2 to 4). An end face of the notch 13 on the working opening 10b side is used as an insertion opening 13a for inserting the pair of first shield wires We1, We1 into the notch 13. As shown in FIG. The notch 13 forms an opening in which the insertion port 13a is closed by the cover 10B, which will be described later, when the cover 10B is attached to the case main body 10A. Here, the opening serves as an opening that connects the inside and outside of the housing 10, and is used as a lead-in port or a lead-out port for the pair of first shielded wires We1, We1. Note that the notch 13 may be provided for each first shield wire We1.

The pair of first shielded wires We1, We1 shown here are held together by a synthetic resin wire holder 55, for example, and fixed to the housing 10 via the wire holder 55 (Fig. 2). The wire holder 55 is arranged in the notch 13 . The wire holder 55 is fixed to the housing 10 by being screwed to the case main body 10A. In the receiving chamber 10a of the case main body 10A, a wire fixing portion 14 having a female screw portion N1 is provided so as to protrude from the inner wall surface 11a of the outer peripheral wall 11 (FIGS. 2 and 4). The wire holder 55 is screwed and fixed to the wire fixing portion 14 by screwing the male screw member B1 (FIG. 2) into the female screw portion N1.

Further, in the electric connecting device 20, a first connector portion 27a and a second connector portion 27b projecting toward the bottom wall 12 side of the housing chamber 10a are formed on the lower surface 27L of the busbar holding member 27 on the bottom wall 12 side. (Figs. 3 and 5). The first connector portion 27a electrically connects the core wire of the one second shield electric wire We2 to the terminal portion of the inner third bus bar 24 by fitting and connecting the connector 52 of the one second shield electric wire We2. . The first connector portion 27a is provided for each third bus bar 24 (for each second shield wire We2 on one side). The second connector portion 27b electrically connects the core wire of the other second shielded wire We2 to the terminal portion of the second bus bar 22 on the inner side by fitting and connecting the connector 52 of the other second shielded wire We2. connect. The second connector portion 27b is provided for each terminal portion of the second bus bar 22 (for each second shield wire We2 on the other side). The first connector portion 27a and the second connector portion 27b are combined in pairs. In this electrical connector 20, a plurality of sets of combinations of the first connector portion 27a and the second connector portion 27b are provided.

In the electrical connecting device 20, the busbar holding member 27 or the cover member 28 is screwed and fixed to the fixing portion 15 of the housing 10 by a screw member (male screw member or female screw member) in the housing chamber 10a (FIGS. 3 and 4). ). The fixing portion 15 is a flat plate-like piece projecting from the inner wall surface 11a of the outer peripheral wall 11 of the case main body 10A, and has one flat surface facing the work opening 10b and the other flat surface facing the bottom wall 12. placed. The fixing portion 15 is formed with a female screw portion N2 having a screw axis in a direction perpendicular to the plane thereof (FIG. 4). The busbar holding member 27 or the cover member 28 is a flat plate-shaped piece projecting from its outer peripheral surface, and has one plane facing the work opening 10b and the other plane facing the bottom wall 12 in the housing chamber 10a. A fixed portion 27c arranged facing is provided (FIGS. 3 to 5). A through hole 27c1 through which the male screw member _B2 is inserted is formed in the fixed portion 27c (FIGS. 4 and 5). The fixed portion 27c is arranged such that the other flat surface of the fixed portion 27c faces one of the flat surfaces of the fixed portion 15, and the male thread member _B2 inserted into the through hole 27c1 is screwed into the female screw portion N2, whereby the fixed portion 15 is and fix it with a screw. As a result, the busbar holding member 27 or the cover member 28 is fixed to the case main body 10A inside the housing chamber 10a. Here, the fixed portion 27c is provided on the busbar holding member 27, and the busbar holding member 27 is fixed to the fixed portion 15 of the housing 10 by screwing.

The electrical connection box 1 is provided with a plurality of sets (here, four sets) of combinations of the fixing portion 15 and the fixed portion 27c that form pairs. In this electrical connection box 1, the fixed portion 15 is provided with a male screw member B2 such as a stud bolt, and a female screw member (not shown) is screwed into the male screw member B2 so that the fixed portion 15 is and the fixed portion 27c may be fixed by screwing.

The storage chamber 10a includes a space _10a1 from the assembled electrical connector 20 to the work opening 10b (hereinafter referred to as "first storage chamber") and a space from the electrical connector 20 to the bottom wall 12 (hereinafter referred to as "first storage chamber"). , ``Second containment chamber'') 10a ₂ and 10a (Fig. 3). In this housing chamber 10a, a first shielded wire We1 with a connector 51 is housed in the first housing chamber _10a1 , and the first shielded wire We1 is pulled out from the first housing chamber _10a1 . In addition, in this storage chamber 10a, the second shielded wire We2 with the connector 52 is housed in the second storage chamber 10a2, and this second shielded wire We2 extends _from the second storage chamber _10a2 to the first storage chamber _10a1. It is drawn around and pulled out from the first storage chamber _10a1 .

Here, the connector 52 at one end of the second shielded wire We2 is physically and electrically connected to the electrical connector 20 before being housed in the housing chamber 10a (FIGS. 3 and 4). Therefore, when the electrical connection tool 20 is inserted into the storage chamber 10a from the work opening 10b, the second shielded wire We2 is inserted together with the electrical connection tool 20 from the work opening 10b into the storage room 10a. be. Further, a terminal fitting 30 is attached to the second shielded wire We2 before the electrical connector 20 is accommodated in the housing chamber 10a (FIG. 4).

The terminal metal fitting 30 is a grounding member for releasing noise carried on the braided body of the second shield electric wire We2 from the housing 10 to the vehicle body. Therefore, this terminal fitting 30 is formed of a metal material, and physically and electrically connects the braided body of the second shield wire We2. This terminal fitting 30 is physically and electrically connected to the housing 10 .

The terminal fitting 30 has an electrical connection portion 31 to which the braided body of the second shield wires We2 is physically and electrically connected, and a fixed portion 32 to be fixed to the housing 10 (FIGS. 2 and 4). 4).

Specifically, the electrical connection portion 31 physically and electrically connects to the braided body of the second shielded wire We2 whose external coating is partially stripped off or stripped off over the entire circumference and exposed. It is a cylindrical part connected to the The electrical connection portion 31 shown here has the exposed braided body arranged in a cylinder, and the inner peripheral wall of the cylinder is physically and electrically connected to the exposed braided body. For example, the electrical connection portion 31 has a single-piece shape before being connected to the braided body. The inner peripheral wall is physically and electrically connected to the braid.

The fixed portion 32 is formed as a flat plate-like piece, and has a circular through hole 32a (FIGS. 2 and 4).

The terminal fitting 30 shown here is shaped as a flag terminal (FIG. 4). A flag terminal is a terminal in which two electrical connection portions 31 are arranged in parallel with the cylinder axis direction aligned in the same direction, and a fixed portion 32 is arranged offset from the aggregate of the two electrical connection portions 31. That is. A terminal metal fitting 30 in the drawing shows an example of a flag terminal.

This terminal fitting 30 is provided for each combination of a pair of the first connector portion 27a and the second connector portion 27b. In this terminal fitting 30, the braided body of the second shield wire We2 connected to one of the pair of first connector portion 27a and second connector portion 27b is connected to one of the two electrical connection portions 31. , and the braided body of the second shield wire We2 connected to the other of the pair of the first connector portion 27a and the second connector portion 27b is connected to the two electrical connection portions 31 physically and electrically connected to the other. In addition, in the figure, one terminal fitting 30 is shown as an example.

This terminal fitting 30 is fixed to the housing 10 outside the housing chamber 10a. Therefore, in the case main body 10A, while the terminal fitting 30 connected to the second shielded wire We2 is placed outside the housing chamber 10a, the second shielded wire We2 and the electrical connection tool 20 are removed from the work opening 10b into the housing chamber. 10a is inserted.

Here, the terminal fitting 30 is fixed to the case main body 10A outside the housing chamber 10a. The case body 10A has a flange portion 16 annularly projecting outward from the annular end portion of the outer peripheral wall 11 on the side of the work opening 10b, and the terminal fitting 30 is fixed to the flange portion 16 ( 2 to 4). Moreover, the cover 10B is also fixed to the flange portion 16 . The flange portion 16 shown here is formed as a flat annular body, and the plane on the cover 10B side thereof is arranged on the same plane as the end surface of the annular end portion of the outer peripheral wall 11 on the work opening 10b side. The terminal fitting 30 is fixed by placing the fixed portion 32 on the flat surface of the flange portion 16 so that the second shielded wire We2 is pulled into the housing chamber 10a from the outside of the housing 10 through the electrical connection portion 31.

The fixed portion 32 is screwed and fixed to the flange portion 16 by a screw member having a screw axis in a direction perpendicular to the plane of the flange portion 16 . For example, a female threaded portion N3 is formed in the flange portion 16, and the portion to be fixed 32 is placed on the female threaded portion N3 with the center of the through hole 32a being aligned (FIGS. 2 and 4). . The fixed portion 32 is screwed and fixed to the flange portion 16 by screwing the male screw member B3 inserted through the through hole 32a into the female screw portion N3. Further, for example, a male screw member B3 (not shown) such as a stud bolt is vertically provided on the flange portion 16, and the fixed portion 32 is placed by inserting the male screw member B3 into the through hole 32a. (not shown). The fixed portion 32 is screwed and fixed to the flange portion 16 by a female screw member (not shown) screwed onto the male screw member B3.

The electric connection box 1 has a plurality of terminal fittings 30, and the fixed portions 32 of all the terminal fittings 30 are screwed to the flange portion 16 by screw members whose screw axes are perpendicular to the plane of the flange portion 16. fix it. As a result, in the electric connection box 1, the male screw member B3 or the female screw member can be screwed in the same direction for all the terminal fittings 30, so that the assembling workability of the terminal fittings 30 is improved. can be made

In the electric connection box 1, first, the second shielded electric wire We2 with the connector 52 is attached to the electric connection tool 20, and the terminal fitting 30 is attached to the second shielded electric wire We2. Next, in the electrical junction box 1, the terminal fitting 30 is left outside the storage chamber 10a, and the electrical connection tool 20 and the second shielded wire We2 are inserted into the storage chamber 10a through the working opening 10b. In this electrical connection box 1, the terminal fitting 30 is screwed and fixed to the flange portion 16 of the case body 10A. Also, in the electrical connection box 1, the first shielded wire We1 with the connector 51 is inserted into the housing chamber 10a through the working opening 10b, and assembled with the electrical connector 20 in the housing chamber 10a and the case body 10A. After that, in the electric connection box 1, the cover 10B is assembled to the case main body 10A, and the work opening 10b is covered with the cover 10B.

Here, the cover 10B is shaped to cover not only the working opening 10b but also the terminal fitting 30 as much as possible. For example, the cover 10B includes a cover main body _10B1 that covers the terminal fittings 30 together with the working opening 10b, and a cylindrical side wall 10B that stands upright from the peripheral edge of the cover main body _10B1 and in which the terminal fittings 30 are arranged. ₂ and (FIGS. 1 to 3). The side wall _10B2 is provided with a notch _10B21 for drawing out the second shield wire We2 (FIG. 3).

The cover 10B is screwed and fixed to the flange portion 16 of the case body 10A. As shown above, the terminal fitting 30 is placed on the plane of the flange portion 16 . For this reason, the flange portion 16 is provided with a plurality of cover fixing portions 17 projecting from the flat surface thereof to a position higher than the terminal fitting 30 . A female screw portion N4 is formed in the cover fixing portion 17 shown here, and the cover main body _10B1 is placed on the screw shaft of the female screw portion N4 so that the center of the through hole _10B11 is aligned (FIG. 2). . The cover main body _10B1 is screwed and fixed to the cover fixing portion 17 by screwing the male screw member B4 inserted through the through hole _10B11 into the female screw portion N4 (FIGS. 1 and 2). The cover 10B is assembled to the case main body 10A in this manner.

A male screw member B4 (not shown) such as a stud bolt is vertically provided on the cover fixing portion 17, and the cover main body _10B1 having the male screw member _B4 inserted into the through hole 10B11 is placed thereon. good too. In this case, the cover main body _10B1 may be screwed and fixed to the cover fixing portion 17 by screwing a female screw member (not shown) onto the male screw member B4.

As described above, in the electrical junction box 1 of the present embodiment, the terminal fittings 30 are assembled to the flange portion 16 of the case body 10A outside the accommodation chamber 10a, so assembly of the terminal fittings 30 inside the accommodation chamber 10a work becomes unnecessary. Therefore, in the electric connection box 1, it is not necessary to provide a working space for assembling the terminal fittings 30 in the housing chamber 10a, so that the housing chamber 10a can be made compact, and the case main body 10A can be prevented from becoming large. be able to. Therefore, in the electric connection box 1 of the present embodiment, the increase in size of the housing 10 can be suppressed, and the increase in size of the entire body can be suppressed. In addition, the electric connection box 1 of the present embodiment can reduce the cost by suppressing an increase in the size of the entire body.

Furthermore, in the electrical connection box 1 of the present embodiment, the terminal fittings 30 are arranged outside the housing chamber 10a, so that the noise on the braided body of the second shield wire We2 is removed from the housing before entering the housing chamber 10a. It can escape from the body 10 to the vehicle body. For this reason. Since the electric connection box 1 can reduce the influence of noise in the electric connection tool 20, the product quality can be improved.

Furthermore, in the electrical connection box 1 of this embodiment, as described above, the male threaded member B3 or the female threaded member can be screwed in the same direction for all the terminal fittings 30. The assembling workability of the terminal fitting 30 can be improved.

Furthermore, in the electrical connection box 1 of the present embodiment, the terminal fittings 30 are arranged outside the housing chamber 10a, so that the terminals can be The fitting 30 can be attached to the case body 10A. Therefore, this electric connection box 1 can improve the assembling workability of the terminal fitting 30 also from this point.

In addition, in the electric connection box 1 of the present embodiment, the outer wall surface of the housing 10 can be formed in a simple shape such as by smoothing the outer wall surface. Therefore, the electrical connection box 1 can simplify measures against interference with peripheral parts when mounted on a vehicle or measures against interference with peripheral parts. In the electric connection box 1 of the present embodiment, since the outer wall surface shape of the housing 10 is simple, the mold cost can be kept low, for example, by simplifying the mold when casting the case main body 10A. .

The wire harness WH of the present embodiment is provided with such an electrical connection box 1, and can similarly exhibit the effects of the electrical connection box 1. As shown in FIG.

1 electrical connection box 10 housing 10a storage chamber 10b working opening (opening at one end)
10A case main body 10B cover 10B ₁ cover main body 10B ₂ side wall 11 outer peripheral wall 12 bottom wall 16 flange portion 20 electrical connector 30 terminal metal fitting 31 electrical connection portion 32 fixed portion B3 male screw member (screw member)
We1 1st shielded wire We2 2nd shielded wire WH Wire harness

Claims (6)

a metal housing having a containment chamber and fixed to a conductive vehicle body;
an electrical connector for electrically connecting the core wire of the first shielded wire on the side of the first connection object drawn into the housing chamber from the outside of the housing and the core wire of the second shielded wire on the side of the second connection object;
a terminal fitting having an electrical connection portion to which the braided body of the second shield wire is physically and electrically connected;
with
The housing includes a case body having an opening inside the storage chamber surrounded by a cylindrical outer wall and an annular end at one end of the outer wall, and a cover covering the opening at the one end,
The case main body has a flange portion annularly protruding outward from the annular end portion,
The terminal fitting has a fixed portion that is placed on and fixed to a plane of the flange portion so that the second shielded wire is pulled into the housing chamber from the outside of the housing via the electrical connection portion. electrical connection box. A plurality of the terminal fittings are provided,
2. The electrical connection box according to claim 1, wherein the fixed portion is fixed to the flange portion by screwing with a screw member having a screw axis in a direction perpendicular to the plane of the flange portion. 3. The electrical connection box according to claim 1, wherein the housing has a bottom wall that closes the opening at the other end of the outer peripheral wall and forms the storage chamber surrounded by the outer peripheral wall. The cover has a cover main body covering the terminal fitting together with the opening at the one end, and a side wall erected from the peripheral edge of the cover main body and inside of which the terminal fitting is arranged. 4. The electric connection box according to 1, 2 or 3. 5. The electrical junction box according to claim 1, wherein said terminal fittings are flag terminals. a first shielded wire on the first connection object side;
a second shielded wire on the second connection object side;
a metal housing having a containment chamber and fixed to a conductive vehicle body;
an electrical connector that electrically connects the core wire of the first shielded wire drawn into the housing from the outside of the housing and the core wire of the second shielded wire;
a terminal fitting having an electrical connection portion to which the braided body of the second shield wire is physically and electrically connected;
with
The housing includes a case body having an opening inside the storage chamber surrounded by a cylindrical outer wall and an annular end at one end of the outer wall, and a cover covering the opening at the one end,
The case main body has a flange portion annularly protruding outward from the annular end portion,
The terminal fitting has a fixed portion that is placed on and fixed to a plane of the flange portion so that the second shielded wire is pulled into the housing chamber from the outside of the housing via the electrical connection portion. wire harness.

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