CN100481663C - Electric wiring case - Google Patents

Abstract

The present invention provides an electrical junction box capable of preventing a wire connection portion of a terminal fitting and wires fitted on the wire connection portion from protruding from a box main body, thereby achieving miniaturization. An electric junction box (1) has a box main body (2), terminal fittings (3) and side covers (4). The box main body (2) has a terminal fitting portion (9) provided on an upper surface (2a) and a groove (14) recessed from an outer wall surface (13a). The terminal fitting (3) has an electrical contact portion (11) and a wire connection portion (15). The electrical contact part (11) is fitted on the terminal fitting part (9). The wire connection part (15) is fitted with wires (18). The box main body (2) accommodates the wire connection part (15) and the wire (18) in the groove (14), thereby fitting the terminal fitting (3) on the terminal fitting part (9). At this time, the longitudinal direction of the electrical contact portion (11) is parallel to the outer wall surface (13a). The side cover (4) is assembled on the box main body (2) in the form of blocking the groove (14).

Description

Electrical junction box

technical field

The present invention relates to an electrical junction box mounted on automobiles or the like as mobile bodies.

Background technique

In general, a mobile vehicle is equipped with various electronic devices such as lamps such as headlights and tail lights, and electric motors such as starter motors and air-conditioning motors.

In order to supply electric power to the above-mentioned various electronic devices, the above-mentioned automobile is equipped with a junction box at an appropriate position. The above-mentioned junction box is composed of a collection of various circuit units such as fuses and relays.

In addition, the junction box sometimes has fuses, relays, bus bars, etc., so it is also called a fuse box, a relay box, or an electrical junction box in general. In this specification, the above-mentioned fuse box, relay box, and junction box are collectively referred to as an electrical junction box below.

The electrical junction box has a box main body and terminal fittings forming an outer contour. On the upper surface of the box main body, for example, a plurality of mounting portions for mounting electrical components such as the above-mentioned relays, fuses, and fusible rings are provided. In addition, a connector arranged in the wiring harness in the above-mentioned automobile is fitted to, for example, the lower surface of the box main body.

The wiring harness has a plurality of electric wires and connectors fitted at ends and the like of the electric wires. The connector is fitted into various electronic devices mounted in the above-mentioned automobile or the above-mentioned box main body. Furthermore, the box main body accommodates various electrical components mounted on the mounting portion, and bus bars for connecting terminals of connectors of the wiring harness in a predetermined pattern, and the like.

The terminal fitting is made of a thick conductive metal plate, and has a flat electric contact part and a wire connection part integrally. In the electrical contact portion, there is provided a hole or a notch through which the threaded portion of the bolt can pass. The electrical contact part is assembled on the above-mentioned box main body by screwing the threaded part through the bolt in the hole or the notch into the upper surface of the box main body or the like.

The electric wire connection part is bent from the said electric contact part, and is erected from this electric contact part. The electric wire connection part has crimping pieces etc. which crimp the electric wire connected to a power supply etc. In the electric wire connection part, the electric wire is riveted with the riveting piece, and connected to the core wire of the electric wire.

In the above-mentioned electric junction box, an electric contact portion of a terminal fitting to which electric wires are attached is mounted on the upper surface of the box main body by bolts. In addition, at this time, the electric wire connection part of the terminal fitting and the electric wire mounted on the electric wire connection part are not housed in the above-mentioned box main body, but are placed along the outer wall surface of the box main body.

Then, necessary electrical components are mounted on each mounting portion, and the connector of the wiring harness is fitted to the lower surface of the box main body. In this way, the above-mentioned electric junction box is assembled. Then, the electric junction box supplies electric power supplied from a power source or the like to the above-mentioned electronic equipment via the fusible ring, the wires of the wiring harness, and the like.

In the above-mentioned conventional electrical junction box, the electric wires and the electric wire connecting parts of the terminal fittings are not accommodated in the box main body, but are arranged along the outer wall surface of the box main body. Therefore, in the conventional electric junction box, the electric wire connecting portion of the terminal fitting protrudes from the box main body, and tends to increase in size.

Contents of the invention

Therefore, an object of the present invention is to provide an electrical connection box capable of preventing a wire connection portion of a terminal fitting and wires mounted on the wire connection portion from protruding from a box main body, thereby achieving miniaturization.

In order to solve the above-mentioned problems and achieve the purpose, the electrical junction box of the present invention described in technical solution 1 includes: a box main body with a mounting portion for mounting electrical components on the surface; and a terminal fitting with an electrical contact portion assembled on the above-mentioned surface. , and an electric wire connecting portion that is erected from the above-mentioned electrical contact portion and assembled with electric wires; it is characterized in that it has a groove that is recessed from the outer wall surface of the above-mentioned box body and accommodates the electric wire connecting portion of the above-mentioned terminal fitting, and the electric wire of the above-mentioned terminal fitting In a state where the longitudinal direction of the connection part is parallel to the outer wall surface provided with the groove, the electrical contact part is mounted on the surface, and the wire connection part is accommodated in the groove.

The electrical junction box of the present invention described in technical solution 2 is characterized in that, in the electrical junction box described in technical solution 1, there is a side cover that can be freely attached to and detached from the box main body and is assembled on the box main body. , the above groove will be blocked.

The electrical junction box of the present invention described in technical solution 3 is characterized in that, in the electrical junction box described in technical solution 2, the above-mentioned side cover has: a main body, when assembled on the above-mentioned box main body, the above-mentioned concave the groove is blocked; and a partition wall is erected from the main body portion toward the inner side of the groove, and accommodates the wire connection portion of the terminal fitting between one surface thereof and the inner surface of the groove.

The electric junction box of the present invention according to claim 4 is characterized in that, in the electric junction box according to claim 3, the electric wires whose ends are fitted to the mounting portion are housed in the other of the partition walls. between the surface and the inner face of the aforementioned groove.

The electric junction box of the present invention according to claim 5 is characterized in that, in the electric junction box according to claim 3 or 4, a buckle is provided at the front end of the partition wall on the side away from the main body. The engaging portion has a fastening support portion fastened with the fastening portion on the inner surface of the groove.

According to the electric junction box of the present invention described in technical solution 1, since the wire connection part of the terminal fitting is accommodated in the groove, the wire connection part and the wire assembled on the wire connection part are accommodated in the groove, Thereby, it can be prevented that it protrudes to the outside of the box main body.

According to the electrical junction box of the present invention described in technical solution 2, because the side cover that blocks the groove is provided, it can prevent foreign matter from contacting the wire connection part in the groove and the wire assembled on the wire connection part, and The rigidity of the box main body can be increased.

According to the electrical junction box of the present invention described in claim 3, since the side cover has the partition wall, the rigidity of the side cover itself, that is, the box main body can be further increased. Furthermore, since the electric wire connection part and the electric wire attached to this electric wire connection part are accommodated between the one surface of a partition wall and the inner surface of a groove, it can be positioned in a groove.

According to the electrical junction box of the present invention described in claim 4, the electric wires mounted on the mounting portion are accommodated between the other surface of the partition wall and the inner surface of the groove. Therefore, it is possible to prevent the electric wires accommodated in the groove from coming into contact with each other.

According to the electric junction box of the present invention described in technical solution 5, the fastening part provided at the front end of the partition wall and the fastening supporting part provided on the inner surface of the groove are mutually fastened. Therefore, unintentional movement of the partition wall within the groove can be prevented, and the rigidity of the box main body can be further improved.

As described above, in the present invention according to claim 1, it is possible to prevent the wire connection portion and the wires attached to the wire connection portion from protruding outside the box main body. Therefore, miniaturization can be achieved.

The invention described in technical solution 2 can prevent foreign matter from contacting the electric wires in the groove, and can prevent the electric wires from protruding from the groove. Therefore, unintentional breakage of the electric wires in the groove can be prevented. In addition, the rigidity of the main body of the box can be increased because the groove is blocked by the side cover.

The present invention described in claim 3 can further increase the rigidity of the side cover itself, that is, the box main body. Also, it is possible to position the electric wire connection portion and the electric wire fitted on the electric wire connection portion within the groove.

According to the invention described in claim 4, the electric wires accommodated in the groove can be prevented from contacting each other. Therefore, unintentional breakage of these electric wires can be reliably prevented.

In the present invention described in claim 5, the partition wall can be prevented from moving unintentionally in the groove, and the rigidity of the box main body can be further improved because the partition wall is less likely to move unintentionally in the groove.

Description of drawings

FIG. 1 is a plan view of an electrical junction box according to one embodiment of the present invention.

FIG. 2 is a perspective view showing a terminal fitting for live wires of the electrical junction box shown in FIG. 1 .

Fig. 3 is a perspective view showing a side cover of the electrical junction box shown in Fig. 1 .

Fig. 4 is a perspective view showing a box main body and side covers of the electrical connection box shown in Fig. 1 .

Fig. 5 is another perspective view showing a box main body and side covers of the electrical junction box shown in Fig. 1 .

Fig. 6 is a plan view showing a modified example of the electrical junction box shown in Fig. 1 .

Fig. 7 is a perspective view showing a main part of a modified example of the electrical junction box shown in Fig. 6 .

Fig. 8 is a perspective view showing a state in which the snap-fit flange and the snap-fit support flange of the electrical junction box shown in Fig. 7 are snapped to each other.

Detailed ways

Next, an electrical junction box according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5 . The electrical junction box 1 shown in FIG. 1 according to this embodiment is mounted on an automobile as a mobile body.

As shown in FIG. 1 , the electrical junction box 1 has a box main body 2 , a wiring tray not shown, terminal fittings 3 , side covers 4 , and the like. The box main body 2 is made of insulating synthetic resin, and is molded by known injection molding. The box main body 2 is formed in a cylindrical shape (box shape) by a plurality of outer walls 13 .

In addition, on the upper surface (corresponding to the surface) 2a of the box main body 2 on the front side in FIG. Electrical components such as a melting ring 6 and a connector 7 as an electrical component are fitted. Nuts (not shown) screwed to the bolts 10 are buried in the terminal mounting portion 9 . The terminal fitting part 9 passes through the later-described electrical contact part 11 (shown in FIG. 2 ) of the terminal fitting 3 superimposed on the upper surface 2 a, and the bolt 10 is passed through a later-described hole provided on the electrical contact part 11 12 is screwed with the nut, so that the terminal fitting 3 is assembled.

In addition, a connector of a wiring harness arranged in the above-mentioned automobile is fitted to an unillustrated lower surface of the box main body 2 located on the rear side in FIG. 1 . The connector of the wiring harness is fitted to various electronic devices mounted in the above-mentioned automobile and the above-mentioned box main body 2 .

Furthermore, in the box main body 2, as shown in FIG. 1, FIG. 4 and FIG. 5, a groove 14 recessed from a surface (hereinafter referred to as an outer wall surface) 13a of one outer wall 13 is provided. That is, the electrical junction box 1 has the groove 14 . The groove 14 extends linearly along the direction in which the upper surface 2 a and the lower surface face each other.

In addition, along the direction perpendicular to the direction in which the above-mentioned upper surface 2a and the lower surface are opposed to each other, a sliding groove 21 is provided on the inner edge portion 14a of the groove 14 facing each other, and the sliding groove 21 is arranged along the above-mentioned upper surface 2a and the lower surface. The directions in which the surfaces face each other extend linearly. The slide groove 21 is formed in a concave shape along the width direction of the groove 14 from the inner edge portion 14a. The mounting portion 8 b to which the connector 7 is fitted and the terminal fitting portion 9 are provided in the vicinity of the groove 14 .

The wiring board has conductive bus bars, insulating plates, and the like. The bus bar is obtained by subjecting a conductive metal plate to a punching process such as punching. A plurality of bus bars are provided. Multiple bus bars overlap each other. The insulating plate is arranged between mutually overlapping bus bars, etc., and prevents the bus bars from being electrically connected to each other at an undesired position, that is, short circuit, and positions the bus bars.

After the wiring tray is accommodated in the box main body 2, the following components are electrically connected to each other according to a predetermined pattern: the connector of the bus bar and the wiring harness, the electrical components such as the relay 5 and the fusible ring 6 installed on the mounting part 8a, The connector 7 fitted to the mounting portion 8 b and the terminal fitting 3 fitted to the terminal fitting portion 9 .

The terminal fitting 3 is obtained by bending a thick metal plate or the like. As shown in FIG. 2 , the terminal fitting 3 integrally has a flat electric contact portion 11 and a wire connection portion 15 . The planar shape of the electrical contact portion 11 is a rectangular shape. A hole 12 capable of passing through the threaded portion of the above-mentioned bolt 10 passes through the electrical contact portion 11 .

The wire connection part 15 has a bottom plate part 16 and a plurality of crimping pieces 17 . The bottom plate portion 16 is bent from the electrical contact portion 11 and stands upright from the electrical contact portion 11 . In addition, in the illustrated example, the angle formed by the bottom plate portion 16 and the electrical contact portion 11 is about 90 degrees. The electric wire connection part 15 is erected from the electrical contact part 11 through the attachment bottom plate part 16 .

The riveting pieces 17 are connected to both sides in the width direction of the bottom plate portion 16 . The riveting piece 17 is bent in a direction close to the bottom plate portion 16 and sandwiches the electric wire 18 between it and the bottom plate portion 16 . In this way, the riveting piece 17 is riveting the electric wire 18 . The electric wire connection part 15 crimps the electric wire 18 through the crimping piece 17, assembles the electric wire 18, and is electrically connected to the electric wire 18.

The above-mentioned terminal fittings 3, as shown in FIGS. Mounted on the terminal fitting part 9 . At this time, the electrical contact portion 11 overlaps the terminal mounting portion 9 and is mounted on the terminal mounting portion 9, that is, the upper surface 2a by screwing the bolt 10 with the threaded portion inserted into the hole 12 with a nut. In addition, the longitudinal direction of the electrical contact portion 11 is parallel to the outer wall surface 13 a of the outer wall 13 provided with the groove 14 . In addition, the electric wires 18 attached to the terminal fitting 3 are connected to a power source such as a battery in the illustrated example.

The side cover 4 is made of insulating synthetic resin and molded by known injection molding. As shown in FIGS. 3 to 5 , the side cover 4 integrally has a flat main body portion 19 and a partition wall 20 . The main body portion 19 is formed in a rectangular planar shape substantially identical to the planar shape of the groove 14 described above. The main body part 19 is fitted to the box main body 2 by inserting both sides in the width direction into the slide grooves 21 described above.

The main body part 19, that is, the side cover 4, after being assembled on the box main body 2, becomes substantially a plane with the outer wall surface 13a of the outer wall 13 provided with the above-mentioned groove 14, and the opening of the above-mentioned groove 14 on the outer wall 13 is blocked. live. In this way, the main body 19 , that is, the side cover 4 , is assembled to the box main body 2 to block the above-mentioned groove 14 . In addition, the side cover 4 which is the main body portion 19 does not block the openings of the groove 14 on the upper surface 2a and the lower surface side (that is, the openings are opened) after being assembled to the box main body 2 .

The partition wall 20 is erected from the main body portion 19 toward the inner surface of the groove 14 and extends linearly along the direction in which the upper surface 2 a and the lower surface of the box main body 2 face each other. The partition wall 20 is provided at the center of the main body portion 19 in the width direction. As shown in FIG. 1 , the partition wall 20 partitions the groove 14 into a first space 22 and a second space 23 . The first space 22 and the second space 23 extend linearly along the direction in which the upper surface 2 a and the lower surface of the box body 2 face each other.

In addition, the side cover 4 has a plurality of binding bands 24 . The binding straps 24 are arranged at intervals along the longitudinal direction of the main body 19 , that is, the side cover 4 . At least one end of the binding strap 24 is connected to one of the main body portion 19 and the partition wall 20 . The binding band 24 binds the electric wire 25 equipped with the connector 7 fitted in the said attachment part 8b to the side cover 4 which is the main body part 19 at the end part. The binding band 24 positions the above-mentioned electric wires 25 equipped with the connectors 7 at the ends in the above-mentioned second space 23 . In addition, the end portion of the electric wire 25 to which the connector 7 is fitted is fitted to the fitting portion 8b by fitting the connector 7 to the fitting portion 8b.

The electrical junction box 1 described above can be assembled as follows. First, the wiring tray is accommodated in the box body 2 , and electrical components such as the fusible ring 6 and the relay 5 are mounted on the mounting portion 8 a provided on the upper surface 2 a of the box body 2 . Then, the electric wire 18 equipped with the terminal fitting 3 is accommodated in the groove 14, so that the length direction of the electrical contact portion 11 of the terminal fitting 3 is parallel to the outer wall surface 13a of the outer wall 13 provided with the groove 14, and the electrical contact The portion 11 is superimposed on the terminal fitting portion 9 . Then, the threaded portion is passed through the hole 12 , and the bolt 10 is screwed to the nut of the terminal fitting portion 9 . In this way, the terminal fitting 3 is fixed to the terminal fitting portion 9 . Thus, the electric wires 18 and the electric wire connecting portion 15 of the terminal fitting 3 are accommodated in the groove 14 .

Then, the electric wire 25 equipped with the connector 7 at the end is bound to the side cover 4 with the binding band 24 . Then, insert the two sides of the side cover 4 in the width direction into the chute 21 , and assemble the side cover 4 on the box main body 2 . Thus, the side cover 4 blocks the groove 14 . In this way, the electrical junction box 1 having the above-mentioned configuration can be assembled. Then, the electrical junction box 1 is mounted in an automobile by fitting the connector of the wiring harness to the lower surface of the box main body 2 or the like. Then, the electrical junction box 1 electrically connects the electronic equipment of the automobile, and electrical components such as the fusible ring 6 or the relay 5 and the like to each other according to a predetermined pattern.

According to this embodiment, the wire connection part 15 of the terminal fitting 3 is accommodated in the groove 14, so the wire connection part 15 and the wire 18 assembled on the wire connection part 15 are accommodated in the groove 14, thereby preventing It protrudes outside the box main body 2 . Therefore, it is possible to reduce the size of the box main body 2 , that is, the electrical connection box 1 .

Because there is a side cover 4 that blocks the groove 14, foreign matter can be prevented from contacting the wire connecting portion 15 in the groove 14 and the wire 18 assembled on the wire connecting portion 15, and the wire 18 can be prevented from coming out of the groove 14. stick out. Therefore, unintentional breakage of the electric wires 18 within the groove 14 can be prevented. In addition, since the side cover 4 closes the groove 14, the rigidity of the box main body 2 can be increased.

Since the side cover 4 has the partition wall 20, the rigidity of the side cover 4 itself, that is, the box main body 2 can be further increased. Moreover, because the wire connection part 15 and the wire 18 fitted on the wire connection part 15 are housed in the first space 22 between one surface 20a of the partition wall 20 and the inner surface of the groove 14, it is possible to Position it in slot 14.

The electric wire 25 whose end portion is fitted to the mounting portion 8 b is housed in the second space 23 between the other surface 20 b of the partition wall 20 and the inner surface of the groove 14 . Therefore, it is possible to prevent the electric wires 18 and 25 accommodated in the groove 14 from coming into contact with each other. Therefore, unintentional damage to these electric wires 18 and 25 can be reliably prevented.

In the present invention, as shown in FIGS. 6 to 8, a snap-fit flange 26 may be provided on the partition wall 20 as a snap-fit portion, and a snap-fit support flange 27 may be provided on the inner surface of the groove 14 as a snap-fit support portion. . A snapping flange 26 is provided at the front end of the partition wall 20 on the side away from the main body portion 19 . The fastening flange 26 protrudes from the partition wall 20 to the outside of the partition wall 20 along the width direction of the main body 19 , that is, the side cover 4 . The engaging flange 26 extends linearly along the direction in which the upper surface 2 a and the lower surface face each other, that is, the longitudinal direction of the main body portion 19 .

A pair of snap-fit support flanges 27 are provided on the inner surface (hereinafter referred to as the inner surface) 14b of the groove 14 parallel to the outer wall surface 13a of the outer wall 13 . The snap-fit support flange 27 has a standing portion 28 and an extending portion 29 extending from the rear surface 14 b to the outside of the box body 2 . The erected portions 28 are arranged at intervals along the width direction of the side cover 4 . The extension portion 29 extends from the erected portion 28 in a direction in which the erected portions 28 approach each other.

The snap-fit supporting flange 27 having the above-mentioned standing portion 28 and the extending portion 29 extends linearly along the direction in which the above-mentioned upper surface 2a and the lower surface face each other. The upstanding portions 28 of the pair of snap-fit support flanges 27 position the snap-fit flanges 26 therebetween. A pair of extensions 29 of the snap-fit support flanges 27 locate the partition walls 20 therebetween. A pair of extensions 29 of the snap-fit support flange 27 locate the snap-fit flange 26 between it and the inside surface 14b.

The snap-fit flange 26 and the snap-fit supporting flange 27 position the snap-fit flange 26 between the erected portions 28, and between the inner side surface 14b and the extension portion 29, and the partition wall 20 is positioned at the extension portion 29, thereby interlocking with each other.

According to the electrical junction box 1 shown in FIGS. 6 to 8 , the snap-fit flange 26 provided on the front end of the partition wall 20 and the snap-fit support flange 27 provided on the inner side surface 14b of the groove 14 snap together. Therefore, unintended movement of the partition wall 20 in the groove 14 can be prevented, and since the partition wall 20 is less likely to move unintentionally in the groove 14, the rigidity of the box main body 2 can be further improved.

In addition, the above-mentioned embodiment has shown the typical form of this invention, and this invention is not limited to this embodiment. That is, various deformation|transformation can be implemented in the range which does not deviate from the summary of this invention.

Claims (4)

1. connection box comprises with the lower part:

Box main body has the installation portion that electric component is installed on the surface;

Terminal fittings has: the electrical contacts that is assemblied in above-mentioned surface; With found the electric wire connecting portion of establishing and assemble electric wire from above-mentioned electrical contacts;

Groove caves in to above-mentioned box main body side from the outside wall surface of above-mentioned box main body, accommodates the electric wire connecting portion of above-mentioned terminal fittings; And

Limit lid can freely load and unload on above-mentioned box main body, and when being assembled on the above-mentioned box main body, above-mentioned groove can be blocked.

2. connection box according to claim 1 is characterized in that,

Above-mentioned limit lid has: main part, when being assembled on the above-mentioned box main body, above-mentioned groove can be blocked; And spaced walls, stand to the inboard of above-mentioned groove from aforementioned body portion and to establish, and the electric wire connecting portion of above-mentioned terminal fittings is housed between the inner face of surface of described spaced walls and above-mentioned groove.

3. connection box according to claim 2 is characterized in that,

The end is assembled in electric wire on the above-mentioned installation portion, is housed between the inner face of another surface of above-mentioned spaced walls and above-mentioned groove.

4. according to claim 2 or 3 described connection boxes, wherein,

Also comprise: the engaging support mechanism that above-mentioned box main body and above-mentioned limit lid is fastened,

Above-mentioned engaging support mechanism is provided with buckling parts in the above-mentioned spaced walls part relative with aforementioned body portion via above-mentioned limit lid, has fastening support with above-mentioned buckling parts fastening at the inner face of above-mentioned groove.

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