JP2009278800A - On-vehicle electric connection box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection box which highly densely houses electric components, and includes a high designing flexibility for designing a wire cabling and a circuit. <P>SOLUTION: The electric connection box includes a structure in which in a deep case 11 having a vertical cross section larger than a horizontal cross section, a horizontal block 21 provided with an electric component attaching surface 21a having a plurality of relay attaching portions 23 and/or fuse attaching portions formed on its upper part in a horizontal direction is disposed; and a vertical block 22 provided with an electric component attaching surface 22a having a plurality of relay attaching portions 24 and/or fuse attaching portions in a horizontal direction is formed with a space on the lower part of the horizontal block 21. A space S1 between the vertical block 22 and an outer peripheral wall 13 of the case 11, and a space S2 between the vertical block 22 and the horizontal block 21 are used as an insertion space S of electric wires W1, W2 connected to the horizontal block 21 and the vertical block 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an on-vehicle electrical junction box, and more particularly, to enable high-density accommodation of electrical components and to increase the degree of freedom in wiring design and circuit design.

In recent years, electrical components mounted on automobiles have increased rapidly, and accordingly, it is necessary to accommodate a large number of electrical components such as relays and fuses in an electrical junction box that branches circuits to electrical components. In particular, conventional electrical junction boxes often contain a plurality of electrical components arranged side by side in the horizontal direction, and the installation space for the electrical junction box tends to increase.
Furthermore, when a large number of relays and fuses are attached to the electrical junction box, in order to route a large number of electric wires connected to these relays and fuses without interfering with other housing members and to draw them out of the electrical junction box, Wiring space is required inside the electrical junction box, which increases the size of the electrical junction box.
However, due to the increase in electrical components, there is a limit to the expansion of the installation space of the electrical junction box, and there is a demand for suppressing the increase in size of the electrical junction box.

With respect to this problem, the applicant of the present application disclosed in Japanese Patent Application Laid-Open No. 2002-325336 (Patent Document 1) fixes the semiconductor relay block 3 to the upper opening side of the case 2 as shown in FIG. The electrical connection box 1 is provided in which the relay block 4 is accommodated and fixed on the bottom side of the No. 2 and the semiconductor relay block 3 and the relay block 4 are arranged vertically.
Like this electrical junction box 1, by arranging the electrical components vertically inside the case and effectively utilizing the space, it is possible to accommodate the electrical components at a high density and prevent an increase in size in the horizontal direction. The installation space in the horizontal direction of the electrical junction box can be reduced.

  However, when the installation space of the electrical connection box 1 is narrow in the horizontal direction, when the upper and lower relay mounting surfaces 3a and 4a of the relay blocks 3 and 4 are horizontally arranged as in the electrical connection box 1, Since the relay mounting surfaces 3a and 4a are also small, the number of relays 5 and 6 that can be mounted is reduced, and it is difficult to accommodate the electrical components at high density.

  In order to increase the number of electrical components mounted in the above case, the relay mounting surfaces 3a and 4a of the relay blocks 3 and 4 can be expanded to the full horizontal section of the case 2, but When the relay block 4 arranged on the side is sized to block the horizontal cross section of the case 2, the space in the case 2 is divided vertically by the relay block 4, so that the relay block 4 is connected to the relay block 4. The insertion hole for the electric wire 8 cannot be provided in the upper part of the case 2, and conversely, the insertion hole for the electric power 7 connected to the relay block 3 disposed in the upper part cannot be provided in the lower part of the case 2. For the same reason, it is not possible to set a loop line connecting the upper and lower relay blocks 3 and 4, and there are many restrictions on circuit design.

JP 2002-325336 A

  The present invention has been made in view of the above problems, and even when the installation space is narrow in the horizontal direction, a large number of electrical components can be accommodated at high density, and the degree of freedom in wiring design and circuit design is high. The issue is to provide an electrical junction box for use.

In order to solve the above problems, the present invention provides an electrical component comprising a plurality of relay mounting portions and / or fuse mounting portions on the upper side in a deep bottom case having a larger vertical cross section than a horizontal cross section. A horizontal block with a horizontal mounting surface is accommodated, while a space is opened below the horizontal block, and an electrical component mounting surface consisting of a plurality of relay mounting portions and / or fuse mounting portions is set vertically. Accommodates the vertical block provided,
A wire is provided between the vertical block and the outer peripheral wall of the case and between the vertical block and the horizontal block, and the space is connected to a relay or / and a fuse attached to the horizontal block and the vertical block. An in-vehicle electrical junction box is provided, characterized in that it is an insertion space.

  The electrical junction box of the present invention is mounted in a place where there is a margin in the vertical space even when the installation space in the vehicle is narrow in the horizontal direction. In the electrical junction box, the case is deep and the vertical block is arranged inside, so that the vertical cross section of the case is larger than the horizontal cross section, and the electric component mounting surface of the vertical block is wide. Therefore, the number of electrical components such as relays and fuses can be increased, and various electrical components can be accommodated at high density.

  Also, by arranging a horizontal block on the upper side in the case and a vertical block on the lower side, the space between the vertical block and the outer peripheral wall of the case and the vertical wall can be divided without dividing the space in the case up and down by the block. The space between the block and the horizontal block can be a continuous wire insertion space in which the wires connected to the horizontal block and the vertical block can move up and down. Therefore, the wire insertion port connected to the upper horizontal block can be provided on the lower side of the case, and the wire insertion port connected to the lower vertical block can be provided on the upper side of the case. The wire can be pulled out from the wire insertion port.

  At least one electric component attached to each of the horizontal block and the vertical block is connected by a loop line.

  As described above, since the wiring space is provided between the horizontal block and the vertical block arranged below the horizontal block, it is possible to connect the electrical component of the horizontal block and the electrical component of the vertical block via a loop line. it can.

  As described above, electric wire insertion openings are provided in the upper and lower portions of the case, and electric wires connected to the horizontal block and the vertical block are inserted through either of the electric wire insertion openings.

  As described above, the vehicle-mounted electrical junction box according to the present invention has a vertical block disposed in a deep bottom case. Therefore, even if the installation space for the electrical junction box is small in the horizontal direction, When there is room in the space, a large number of electrical components can be mounted by securing a wide electrical component mounting surface of the vertical block. Further, by making the case deep, it is possible to prevent the electrical junction box from being increased in size in the horizontal direction, so that it is possible to accommodate high-density electrical components that effectively use a limited space in the vehicle.

  Further, by arranging a horizontal block on the upper side in the case and arranging a vertical block on the lower side of the horizontal block, the vertical block and the outer peripheral wall of the case are separated without dividing the space in the case up and down by the block. And the space between the horizontal block and the vertical block can be a continuous wire insertion space that can be moved up and down. Therefore, the electric wires connected to the electric parts of the horizontal block and the vertical block can be routed in an arbitrary direction through the electric wire insertion space, and drawn out from the electric wire insertion port suitable as the wiring direction of the electric wires drawn out from the electric connection box.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 show an in-vehicle electrical junction box 10 according to a first embodiment of the present invention.

  As shown in FIGS. 1 (A), 1 (B) and 2, the electrical junction box 10 has an electrical component mounting surface 21a on the upper surface in a deep bottom case 11 with a vertical section larger than a horizontal section. The horizontal relay block 21 provided in the horizontal direction and the vertical relay block 22 provided with the electrical component mounting surface 22a in the vertical direction on the side surface are accommodated.

As shown in FIG. 2, a plurality of relay mounting portions 23 are provided on the electrical component mounting surface 21 a of the horizontal relay block 21, and plug-in relays 41 are inserted and connected to the relay mounting portions 23.
As shown in FIG. 1B, the electrical component mounting surface 22a of the vertical relay block has a larger area than the electrical component mounting surface 21a of the horizontal relay block 21, and a large number of relay mounting portions 24 are provided. As shown in A), a plug-in relay 42 is inserted and connected to the relay mounting portion 24.

As shown in FIG. 3A, the case 11 has a protrusion 14 that protrudes from the upper inner surface of the peripheral wall 13 to lock the horizontal relay block 21. A concave portion 27 is formed on the side wall of the horizontal relay block 21, and a taper projection 28 is provided below the concave portion 27.
When the horizontal relay block 21 is assembled in the case 11, the horizontal relay block 21 is inserted from above, and the protrusion 14 of the case 11 gets over the tapered protrusion 28 as shown in FIG. 27 is fitted. Thereby, the horizontal relay block 21 is fixed to the upper part of the case 11, and as shown in FIG. 2, it arrange | positions so that the whole upper surface opening part of the case 11 may be plugged up.

  Further, as shown in FIG. 4A, the inner surface of the peripheral wall 13 of the case 11 is for the vertical relay block 22 extending from the upper end of the peripheral wall 13 to a position below the installation position of the horizontal relay block 21. The positioning groove 15 is formed in the vertical direction.

  The vertical relay block 22 is provided with cassette lock portions 29 shown in FIG. 4B on opposite side walls that do not form the electrical component mounting surface 22a. The cassette lock portion 29 is provided with a locking piece 29c from a connecting piece 29b on both side portions 29a, and a locking claw 29d is projected from the locking piece 29c.

On the other hand, a locked portion 30 that is locked to the cassette lock portion 29 is provided on the inner surface of the peripheral wall 13 at the lower portion of the case 11 facing each other. As shown in FIG. 4B, each locked portion 30 that fixes the vertical relay block 22 has a flexible piece 30b on the outer surface of the frame portion 30a, and a locking groove 30c is provided in the flexible piece 30b. .
The lock claw 29d of the cassette lock portion 29 of the vertical relay block 21 is locked and locked in a locking groove 30c of the locked portion 30 provided on the peripheral wall 13.

  In the region below the installation position of the horizontal relay block 21 in the case 11, as shown in FIG. 1A, the electrical components of the vertical relay block 22 are in a state where the vertical relay block 22 is fixed. A space S1 is formed between the back side surface 22c of the mounting surface 22a and the inner surface of the peripheral wall 13 of the case 11. Further, a space S <b> 2 is also provided between the lower surface 21 b of the horizontal relay block 21 and the upper surface 22 d of the vertical relay block 22.

  Further, in the peripheral wall 13 below the installation position of the horizontal relay block 21 in the case 11, the first electric wire insertion port 19 is inserted at a lower position close to the bottom wall 16, and the second electric wire is inserted at an upper position. A mouth 20 is provided. An electric wire W1 drawn from the lower surface 21b of the horizontal relay block 21 is led out to the outside from the first electric wire insertion port 19 through the space S1, and an electric wire W2 drawn from the back side surface 22c of the vertical relay block 22 is Wiring from the space S1 to S2 leads out from the second electric wire insertion port 20 to the outside.

A loop line W3 is wired between the horizontal relay block 21 and the vertical relay block 22 using the spaces S1 and S2, and is mounted on one relay 41a and the vertical relay block 22 mounted on the horizontal relay block 21. One relay 42a is connected by the loop line W3. Specifically, the horizontal relay block 21 and the vertical relay block 22 are provided with a cavity (not shown) into which the terminal of the electric wire terminal is inserted. The loop line W3 is connected to the relay by inserting the terminal of the loop line W3 into the cavity from the back surface opposite to the electric component mounting surface of the blocks 21 and 22.
In addition, a loop line may connect not only relays but fuses, relays, and fuses.

  As shown in FIGS. 1 (A) and 1 (B), the upper surface of the case 11 accommodating and fixing the horizontal relay block 21 and the vertical relay block 22 is mounted on the upper surface of the horizontal relay block 21 with an upper cover 12 covered. The upper cover 12 and the case 11 are locked to each other.

  The electrical junction box 10 having the above-described configuration accommodates the vertical relay block 22 with the case 11 as a deep bottom, and has a larger vertical cross section than the horizontal cross section of the case 11, so a large relay mounting surface 22 a of the vertical relay block 22 is secured. The number of relays 42 can be increased. Therefore, even when the installation space in the vehicle is narrow in the horizontal direction, the vertical space can be effectively used, and the electrical components can be accommodated in the limited space with high density.

  Also, by arranging the horizontal relay block 21 on the upper side and the vertical relay block 22 on the lower side, a space S1 is formed between the vertical relay block 22 and the peripheral wall 13 of the case 11 in the lower space of the horizontal relay block 21. The space S2 can be provided between the horizontal relay block 21 and the vertical relay block 22, and the spaces S1 and S2 communicate with each other without dividing the lower space of the horizontal relay block 21 vertically as in the prior art. In order to form one electric wire insertion space S, the electric wires W1 and W2 can be moved up and down.

Thereby, the electric wire W1 drawn out from the lower surface 21b side of the horizontal relay block 21 and the electric wire W2 drawn out from the back surface 22c side of the vertical relay block 22 are inserted in the electric wire insertion space S, so that the vertical direction of the case 11 is required. The insertion port can be set at a position, and the electric wire W1 is led out from the first electric wire insertion port 19 close to the bottom wall 16 and the electric wire W3 is led out from the second electric wire insertion port 20 at the upper position as in this embodiment. It is also possible to do.
Thus, since the freedom degree of the setting position of the electric wire insertion ports 19 and 20 increases, the freedom degree of wiring design also increases.
Furthermore, since the wire insertion space S allows the loop line W3 to be wired from the lower surface 21b side of the horizontal relay block 21 to the rear surface 22c side of the vertical relay block 22, the degree of freedom in circuit design is also increased.

BRIEF DESCRIPTION OF THE DRAWINGS The internal structure of the electrical junction box which concerns on 1st embodiment of this invention is shown, (A) is sectional drawing in a side view, (B) is sectional drawing in front view except the relay of the vertical relay block. It is a top view except the upper cover and relay of the electrical junction box shown in FIG. (A) (B) is principal part explanatory sectional drawing which shows the latching structure to the case of the horizontal relay block shown in FIG. 1 shows a structure for fixing a vertical relay block shown in FIG. 1 to a case, (A) is a cross-sectional view for explaining a main part of the structure for fixing a case peripheral wall part, and (B) is a cassette lock part and a case provided in the vertical relay block. It is a perspective view which shows the to-be-locked part provided in the surrounding wall. It is a figure which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Electrical connection box 11 Case 13 Perimeter wall 19 1st electric wire insertion port 20 2nd electric wire insertion port 21 Horizontal (relay) block 21a Electrical component mounting surface 22 Vertical (relay) block 22a Electrical component mounting surface 23, 24 Relay mounting part S Electric wire Insertion space S1, S2 space W1, W2 Electric wire W3 Loop wire

Claims (3)

In a deep bottom case with a larger vertical cross section than a horizontal cross section, a horizontal block is provided with an electrical component mounting surface in the horizontal direction consisting of a plurality of relay mounting portions and / or fuse mounting portions on the upper side. On the other hand, a vertical block is provided in which a space is formed in the lower part of the horizontal block, and a plurality of relay mounting portions and / or electric component mounting surfaces including fuse mounting portions are provided in the vertical direction,
A wire is provided between the vertical block and the outer peripheral wall of the case and between the vertical block and the horizontal block, and the space is connected to a relay or / and a fuse attached to the horizontal block and the vertical block. An in-vehicle electrical junction box, characterized in that it is an insertion space.   The in-vehicle electric junction box according to claim 1, wherein at least one electric component attached to each of the horizontal block and the vertical block is connected by a loop line.   The electrical connection box according to claim 1 or 2, wherein an electric wire insertion opening is provided in an upper portion and a lower portion of the case, and an electric wire connected to the horizontal block and the vertical block is inserted from either of the electric wire insertion openings. .

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