JP4344308B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box mounted on an automobile or the like as a moving body.

  In general, automobiles as moving bodies are equipped with a wide variety of electronic devices such as lamps such as head lamps and tail lamps, and motors such as motors for starter motors and air conditioners.

  In order to supply electric power to the various electronic devices described above, the automobile has arranged junction blocks at appropriate locations. The junction block is composed of various electric circuit units such as a large number of fuses and relays.

  Note that the junction block may include a fuse, a relay, a bus bar, and the like, and thus is also referred to as a fuse block, a relay box, or an electrical connection box. In the present specification, the above-described fuse block, relay box, and junction block are collectively referred to as an electrical connection box.

  The electrical junction box includes a box body that forms an outer shell, and a terminal fitting. On the upper surface of the box body, for example, a plurality of mounting portions on which electrical components such as the relays, fuses and fusible links described above are mounted are provided. Moreover, the connector of the wire harness routed by the motor vehicle mentioned above fits in the lower surface of a box main body, for example.

  The wire harness includes a plurality of electric wires and a connector attached to an end portion of the electric wires. The connector is fitted to various electronic devices mounted on the automobile described above and the box body described above. Furthermore, the box body accommodates a bus bar or the like for connecting various electrical components mounted on the mounting portion described above and the terminals of the connector of the wire harness according to a predetermined pattern.

  The terminal fitting is made of a thick conductive sheet metal, and is integrally provided with a flat electric contact portion and an electric wire connecting portion. The electrical contact portion is provided with a hole or notch through which a threaded portion of the bolt can pass. The electrical contact portion is attached to the box body described above, for example, by a bolt passing through the threaded portion in the hole or notch being screwed into the upper surface of the box body.

  The electric wire connecting portion is bent from the electric contact portion described above and is erected from the electric contact portion. The electric wire connecting part includes a caulking piece or the like for caulking an electric wire connected to a power source. An electric wire connection part crimps an electric wire with a crimping piece, and connects with the core wire of this electric wire.

  In the electrical connection box described above, the electrical contact portion of the terminal fitting to which the electric wire is attached is attached to the upper surface of the box body described above with a bolt. At this time, the electric wire connecting portion of the terminal fitting and the electric wire attached to the electric wire connecting portion are kept along the outer wall surface of the box body without being housed in the box body.

  Then, a desired electrical component is mounted on each mounting portion, and the connector of the wire harness is fitted to the lower surface of the box body. Thus, the electrical junction box described above is assembled. The electrical junction box supplies power from a power source supplied from a power source or the like to the electronic device described above via a fusible link, a wire of a wire harness, or the like.

  The above-described conventional electric junction box accommodates the wires and the terminal fittings in the box body along the outer wall surface of the box body without accommodating them. For this reason, the conventional electric connection box has a tendency to increase in size because the wire connection portion of the terminal fitting protrudes from the box body.

  Accordingly, an object of the present invention is to provide an electric connection box that can be reduced in size by preventing the wire connection portion of the terminal fitting and the electric wire attached to the wire connection portion from protruding from the box body. is there.

In order to solve the above-mentioned problems and achieve the object, the electrical junction box according to claim 1 comprises a box body provided with a mounting portion for mounting an electrical component on the surface, and an electrical contact portion mounted on the surface. And an electric connection box provided with an electric wire connection portion that is erected from the electric contact portion and to which an electric wire is attached, and is recessed from the outer wall surface of the box body and of the terminal metal fitting. A concave groove that accommodates the electric wire connecting portion, a side cover that is detachably attached to the box main body and closes the concave groove when attached to the box main body, and a longitudinal direction of the electric contact portion of the terminal fitting, The electric contact portion is attached to the surface in a state parallel to the outer wall surface provided with the concave groove, the electric wire connecting portion is accommodated in the concave groove, and the side cover is attached to the box body. And the groove A main body portion, and the main body portion erected from the main body portion toward the inside of the groove, and the wire connection portion of the terminal fitting is accommodated between the one surface and the inner surface of the groove, and the other surface A partition wall for accommodating an electric wire having an end attached to the mounting portion between the inner surface of the concave groove, and an electric wire attached to the electric wire connecting portion and an electric wire having an end attached to the mounting portion. It is characterized in that it extends along the entire length of the main body .

Electrical connection box of the present invention described in claim 2 is the electric connection box according to claim 1 Symbol mounting, the engagement portion provided on the side of the tip away from the main body portion of the partition wall, the inner surface of the groove An engagement receiving portion with which the engagement portion engages is provided.

  According to the electrical connection box of the present invention described in claim 1, since the wire connection portion of the terminal fitting is accommodated in the recessed groove, the wire connection portion and the electric wire attached to the wire connection portion are accommodated in the recessed groove. Therefore, these can be prevented from protruding outside the box body.

Is provided with the side cover for closing the recessed groove, it is possible to prevent foreign matter from contact with the wire attached to the wire connecting portion and the electric wire connecting portion of the groove, it is possible to increase the rigidity of the box body.

Since service Idokaba is provided with a partition wall, the rigidity of the side cover itself law Chi box body can be enhanced. Furthermore, since an electric wire connection part and the electric wire attached to this electric wire connection part are accommodated between one surface of a partition wall, and the inner surface of a ditch | groove, these can be positioned in a ditch | groove.

Housing the wire attached to the mounting portion between the other surface and the grooves of the inner surface of specifications Setsukabe. For this reason, it can prevent that the electric wires accommodated in a ditch | groove contact.

According to the electrical junction box of the present invention described in claim 2 , the engaging portion provided at the tip of the partition wall and the engaging receiving portion provided on the inner surface of the groove are engaged with each other. For this reason, while being able to prevent a partition wall moving unexpectedly within a ditch | groove, the rigidity of a box main body can be improved more.

  As described above, the present invention according to claim 1 can prevent the electric wire connecting portion and the electric wire attached to the electric wire connecting portion from protruding outside the box body. Therefore, size reduction can be achieved.

It is possible to prevent the foreign matter to the electric wire in the concave groove in contact, it is possible to prevent the wire comes out of the groove. Therefore, it is possible to prevent the electric wire in the concave groove from being unexpectedly damaged. Further, since the side cover closes the concave groove, the rigidity of the box body can be increased.

The rigidity of the support Idokaba itself rule Chi box body can be further improved. Furthermore, the electric wire connecting portion and the electric wire attached to the electric wire connecting portion can be positioned in the concave groove.

Electric wires to be accommodated in the concave groove can be prevented from coming into contact. For this reason, it can prevent reliably that these electric wires are damaged unexpectedly.

The present invention according to claim 2 can prevent the partition wall from moving unexpectedly in the concave groove, and further increases the rigidity of the box body because the partition wall is less likely to move unexpectedly in the concave groove. it can.

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

  As shown in FIG. 1, the electrical connection box 1 includes a box body 2, a wiring board (not shown), a terminal fitting 3, a side cover 4, and the like. The box body 2 is made of an insulating synthetic resin and is molded by a well-known injection molding. The box body 2 is formed in a cylindrical shape (box shape) by a plurality of outer walls 13.

  Further, an electrical component such as a relay 5 and a fusible link 6 and a connector 7 as an electrical component are fitted to an upper surface (corresponding to the surface) 2a located on the front side of FIG. Mounting portions 8a and 8b to be performed and a terminal mounting portion 9 are provided. A nut (not shown) that is screwed with the bolt 10 is embedded in the terminal mounting portion 9. The terminal mounting portion 9 has an electric contact portion 11 (shown in FIG. 2) of the terminal fitting 3 overlaid on the upper surface 2a, and a bolt 10 passes through a hole 12 described later provided in the electric contact portion 11. The terminal fitting 3 is attached by screwing onto the nut.

  Moreover, the connector of the wire harness routed by the motor vehicle mentioned above is fitted by the lower surface which is not shown in figure located in the back | inner side of FIG. The connector of the wire harness is fitted to the various electronic devices mounted on the automobile described above and the box body 2 described above.

  Further, as shown in FIGS. 1, 4, and 5, the box body 2 is provided with a concave groove 14 that is recessed from the surface (hereinafter referred to as an outer wall surface) 13 a of one outer wall 13. In other words, the electrical junction box 1 includes the concave groove 14. The concave groove 14 extends linearly along the direction in which the above-described upper surface 2a and lower surface face each other.

  Further, along the direction perpendicular to the direction in which the upper surface 2a and the lower surface described above are opposed to each other, the inner edge portion 14a of the groove 14 opposed to each other is along the direction in which the upper surface 2a and the lower surface described above are opposed to each other. A slide groove 21 extending linearly is provided. The slide groove 21 is formed in a concave shape along the width direction of the concave groove 14 from the inner edge portion 14a. The mounting portion 8b into which the connector 7 is fitted and the terminal mounting portion 9 are provided in the vicinity of the concave groove 14 described above.

  The wiring board includes a conductive bus bar and an insulating plate. The bus bar is obtained by subjecting a conductive sheet metal to press working such as punching. A plurality of bus bars are provided. The plurality of bus bars are overlapped with each other. The insulating plates are arranged between the bus bars that are overlapped with each other, and prevent the bus bars from being electrically connected to each other at unintended locations, that is, short-circuiting and positioning the bus bars.

  When the wiring board is housed in the box body 2, the bus bar is a connector of the wire harness, the electrical parts such as the relay 5 and the fusible link 6 mounted on the mounting portion 8a, and the connector fitted to the mounting portion 8b. 7 and the terminal fitting 3 attached to the terminal attachment portion 9 are electrically connected to each other according to a predetermined pattern.

  The terminal fitting 3 is obtained by bending a thick sheet metal. As shown in FIG. 2, the terminal fitting 3 is integrally provided with a flat electrical contact portion 11 and a wire connection portion 15. The planar shape of the electrical contact portion 11 is rectangular. The electrical contact portion 11 has a hole 12 through which the threaded portion of the bolt 10 can be passed.

  The electric wire connection portion 15 includes a bottom plate portion 16 and a plurality of caulking pieces 17. The bottom plate portion 16 is bent from the electrical contact portion 11 and is erected from the electrical contact portion 11. In the illustrated example, the angle formed by the bottom plate portion 16 and the electrical contact portion 11 is approximately 90 degrees. The electric wire connecting portion 15 is provided with the bottom plate portion 16 and thus stands up from the electric contact portion 11.

  The caulking pieces 17 are continuous with both edges in the width direction of the bottom plate portion 16. The caulking piece 17 is bent in a direction approaching the bottom plate portion 16, and the electric wire 18 is sandwiched between the bottom plate portion 16. Thus, the caulking piece 17 crimps the electric wire 18. The electric wire connecting portion 15 is electrically connected to the electric wire 18 while the electric wire 18 is attached by the caulking piece 17 caulking the electric wire 18.

  As shown in FIGS. 4 and 5, the terminal fitting 3 described above has the electric wire connection portion 15 and the electric wire 18 accommodated in the concave groove 14 in the state where the electric wire 18 is attached to the electric wire connection portion 15. The part 11 is attached to the terminal attachment part 9. At this time, the electrical contact portion 11 is overlaid on the terminal attachment portion 9 and is attached to the terminal attachment portion 9, that is, the upper surface 2 a by screwing the bolt 10 with the screw portion passed through the hole 12 into the nut. Moreover, the longitudinal direction of the electrical contact portion 11 is parallel to the outer wall surface 13a of the outer wall 13 provided with the above-described concave groove 14. Moreover, the electric wire 18 attached to the terminal metal fitting 3 is connected to power supplies, such as a battery, in the example of illustration.

  The side cover 4 is made of an insulating synthetic resin and is formed by a known injection molding. As shown in FIGS. 3 to 5, the side cover 4 integrally includes a flat plate-like main body portion 19 and a partition wall 20. The main body 19 is formed in a rectangular shape whose planar shape is substantially equal to the planar shape of the concave groove 14 described above. The main body 19 is attached to the box main body 2 by inserting both edges in the width direction into the slide groove 21 described above.

  When the main body 19, that is, the side cover 4 is attached to the box body 2, the main body 19 is substantially flush with the outer wall surface 13 a of the outer wall 13 provided with the groove 14 described above, and the outer wall 13 of the groove 14 described above Close the opening. Thus, when the main body 19, that is, the side cover 4 is attached to the box main body 2, the concave groove 14 described above is closed. Further, when the body portion 19, that is, the side cover 4 is attached to the box body 2, the opening on the upper surface 2 a and the lower surface side of the groove 14 described above is not blocked (opened).

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

  Further, the side cover 4 described above includes a plurality of binding bands 24. The binding bands 24 are arranged at intervals from each other along the longitudinal direction of the main body 19, that is, the side cover 4. The binding band 24 has at least one end connected to one of the main body 19 and the partition wall 20 described above. The binding band 24 binds the electric wire 25 in which the connector 7 fitted to the mounting portion 8b described above is attached to the main body portion 19, that is, the side cover 4. The binding band 24 positions the electric wire 25 to which the connector 7 described above is attached to the end portion in the second space 23 described above. In addition, as for the electric wire 25, when the connector 7 fits into the mounting part 8b, the edge part to which this connector 7 was attached is attached to the mounting part 8b.

  The electrical junction box 1 described above is assembled as follows. First, a wiring board is accommodated in the box body 2, and electrical components such as the fusible link 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. And the electric wire 18 to which the terminal fitting 3 is attached is accommodated in the concave groove 14, the longitudinal direction of the electrical contact portion 11 of the terminal fitting 3 is made parallel to the outer wall surface 13a of the outer wall 13 provided with the concave groove 14, The electrical contact portion 11 is overlaid on the terminal attachment portion 9. Then, the bolt 10 is screwed into the nut of the terminal mounting portion 9 through the screw portion in the hole 12. In this way, the terminal fitting 3 is fixed to the terminal mounting portion 9. Then, the electric wire 18 and the electric wire connection part 15 of the terminal metal fitting 3 are accommodated in the concave groove 14.

  And the electric wire 25 with which the connector 7 was attached to the side cover 4 by the binding band 24 is bound. Then, both edges in the width direction of the side cover 4 are inserted into the slide groove 21, and the side cover 4 is attached to the box body 2. Then, the side cover 4 closes the concave groove 14. Thus, the electrical junction box 1 having the above-described configuration is assembled. The electrical connection box 1 is mounted on the automobile by fitting a wire harness connector to the lower surface of the box body 2. Then, the electrical junction box 1 electrically connects the automobile electronic device and electrical components such as the fusible link 6 and the relay 5 according to a predetermined pattern.

  According to this embodiment, since the electric wire connection part 15 of the terminal fitting 3 is accommodated in the concave groove 14, the electric wire connection part 15 and the electric wire 18 attached to the electric wire connection part 15 are accommodated in the concave groove 14. That is, these can be prevented from projecting outside the box body 2. Therefore, it is possible to reduce the size of the box body 2, that is, the electrical connection box 1.

  Since the side cover 4 that closes the concave groove 14 is provided, foreign matter can be prevented from coming into contact with the electric wire connecting portion 15 in the concave groove 14 and the electric wire 18 attached to the electric wire connecting portion 15, and from inside the concave groove 14. It is possible to prevent the electric wire 18 from coming out. Therefore, it is possible to prevent the electric wire 18 in the concave groove 14 from being unexpectedly damaged. Further, since the side cover 4 closes the concave groove 14, the rigidity of the box body 2 can be increased.

  Since the side cover 4 includes the partition wall 20, the side cover 4 itself, that is, the rigidity of the box body 2 can be further increased. Further, since the electric wire connecting portion 15 and the electric wire 18 attached to the electric wire connecting portion 15 are accommodated in the first space 22 between the one surface 20a of the partition wall 20 and the inner surface of the concave groove 14, These can be positioned in the groove 14.

  The electric wire 25 whose end is attached to the mounting portion 8 b is accommodated in the second space 23 between the other surface 20 b of the partition wall 20 and the inner surface of the groove 14. For this reason, it can prevent that the electric wires 18 and 25 accommodated in the ditch | groove 14 contact. Therefore, it is possible to reliably prevent the electric wires 18 and 25 from being unexpectedly damaged.

  In the present invention, as shown in FIGS. 6 to 8, the partition wall 20 is provided with an engaging flange 26 as an engaging portion, and the inner surface of the concave groove 14 is provided with an engaging receiving flange 27 as an engaging receiving portion. Also good. The engagement flange 26 is provided at the tip of the partition wall 20 on the side away from the main body 19. The engagement flange 26 protrudes outward from 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, along the longitudinal direction of the main body 19.

  A pair of engagement receiving flanges 27 are provided on an inner surface (hereinafter referred to as a back surface) 14 b parallel to the outer wall surface 13 a of the outer wall 13 of the concave groove 14. The engagement receiving flange 27 includes a standing portion 28 that extends from the aforementioned back surface 14 b toward the outside of the box body 2, and an extending portion 29. The standing portions 28 are arranged at intervals from each other along the width direction of the side cover 4. The extending part 29 extends from the standing part 28 in a direction in which the standing part 28 approaches each other.

  The engagement receiving flange 27 including the above-described standing portion 28 and the extending portion 29 extends linearly along the direction in which the above-described upper surface 2a and lower surface face each other. The standing portions 28 of the pair of engagement receiving flanges 27 position the engagement flange 26 therebetween. The extending portions 29 of the pair of engagement receiving flanges 27 position the partition wall 20 between them. The extending portion 29 of the pair of engagement receiving flanges 27 positions the engagement flange 26 between the rear surface 14b.

  In the engagement flange 26 and the engagement receiving flange 27, the engagement flange 26 is positioned between the standing portions 28 and between the back surface 14 b and the extending portion 29, and the partition wall 20 is positioned between the extending portions 29. And engage with each other.

  According to the electrical junction box 1 shown in FIGS. 6 to 8, the engagement flange 26 provided at the tip of the partition wall 20 and the engagement receiving flange 27 provided on the back surface 14b of the groove 14 are engaged with each other. To do. For this reason, it is possible to prevent the partition wall 20 from moving unexpectedly in the recessed groove 14 and to prevent the partition wall 20 from moving unexpectedly in the recessed groove 14, so that the rigidity of the box body 2 can be further increased.

  In addition, embodiment mentioned above only showed the typical form of this invention, and this invention is not limited to embodiment. That is, various modifications can be made without departing from the scope of the present invention.

It is a top view of the electrical junction box concerning one embodiment of the present invention. It is a perspective view which shows the terminal metal fitting with an electric wire of the electrical-connection box shown by FIG. It is a perspective view which shows the side cover of the electrical-connection box shown by FIG. It is a perspective view which shows the box main body and side cover of the electrical-connection box shown by FIG. It is another perspective view which shows the box main body and side cover of the electrical-connection box shown by FIG. It is a top view which shows the modification of the electrical-connection box shown by FIG. It is a perspective view which shows the principal part of the modification of the electrical junction box shown by FIG. FIG. 8 is a perspective view showing a state in which an engagement flange and an engagement receiving flange of the electrical junction box shown in FIG. 7 are engaged with each other.

Explanation of symbols

1 Electrical junction box 2 Box body 2a Upper surface (surface)
3 Terminal bracket 4 Side cover 5 Relay (electrical part)
6 Fusible links (electric parts)
7 Connector (electrical part)
8a, 8b Mounting portion 10 Bolt 11 Electrical contact portion 13a Outer wall surface 14 Concave groove 15 Wire connection portion 19 Body portion 20 Partition wall 20a One surface 20b The other surface 25 Electric wire 26 Engagement flange (engagement portion)
27 Engagement receiving flange (engagement receiving part)

Claims (2)

A box body provided with a mounting portion for mounting electrical components on the surface;
In an electrical junction box comprising: an electrical contact portion attached to the surface; and a terminal fitting provided with an electrical wire connection portion that is erected from the electrical contact portion and to which an electric wire is attached.
A recessed groove that is recessed from the outer wall surface of the box body and accommodates the wire connection portion of the terminal fitting ;
A side cover that is detachably attached to the box body and closes the concave groove when attached to the box body,
The electrical contact portion is attached to the surface in a state where the longitudinal direction of the electrical contact portion of the terminal fitting is parallel to the outer wall surface provided with the concave groove, and the electric wire connection portion is accommodated in the concave groove. With
The side cover is
A main body that closes the groove when attached to the box body;
While standing from the main body portion toward the inside of the groove, the wire connection portion of the terminal fitting is accommodated between one surface and the inner surface of the groove, and the other surface and the inner surface of the groove. A partition wall that accommodates an electric wire having an end attached to the mounting portion, and an electric wire attached to the electric wire connecting portion and an electric wire having an end attached to the mounting portion. An electrical junction box characterized by extending along its entire length . An engagement part is provided at the tip of the partition wall on the side away from the main body part,
The electrical connection box according to claim 1 , wherein an engagement receiving portion that engages the engagement portion is provided on an inner surface of the concave groove.

Images