JPH10201050A - Electric supply module box structure for electric junction box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric supply module box structure for electric junction box which can reduce a routing space by routing most of bus bars of a power supply system stereoscopically for the wiring materials of a signal system. SOLUTION: This electric junction box stores an insulation plate 14 where the wiring materials 19 of an electric supply system and a signal system are routed in cases 11, 12, whereas a box 21 of roughly inverted-U shaped cross-section in which the bus bars 20 of most of power supply system wiring materials are inner-molded is fitted at the front surface of the insulation plate 14, and the power supply system bus bars 20 are connected to remaining power system wiring materials 19 routed in the insulation plate 14. Fuses 17, relays and so on which are connected to the power supply system bus bars 20 are fitted at the inner surface of the box 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a power supply module box of an electric connection box in which a fuse, a relay, and the like are attached to a box in which a power supply system bus bar is inner-molded to be modularized.

[0002]

2. Description of the Related Art An electrical junction box used for branch connection of an automobile wire harness or the like to various electrical components has a branch connection point concentrated in one place, and the wiring is rationally and economically branched. With the increase in the density of wire harnesses, various types have been developed according to vehicle types or applications.

[0005] As shown in FIG. 5, an insulating plate 4 in which bus bars 3 as wiring materials are arranged in a lower case 1 and an upper case 2 is stacked and accommodated in the electric connection box as described above. There is something.

Terminals (tabs) facing the terminal insertion holes of the upper case 2 are respectively formed on the bus bars 3 of the respective layers, and terminals 7 a of the fuses 7 and the relays 8 are connected from outside the upper case 2 via relay terminals 6. , 8a are respectively inserted and connected. Further, the power supply system and the signal system are mixed in the bus bar 3 of each layer, and are arranged in a wiring pattern that bypasses the bus bar of each system.

[0005]

However, on the upper surface of the insulating plate, the mixed busbar 3 for the power supply system and the signal system is provided.
Must be routed around the bus bar of each system, so that the wiring space becomes large and the electric junction box becomes large. In order to avoid this, a means is adopted in which the bus bars of each system are appropriately divided, each is accommodated in a separate electric connection box, and connected by a wire harness or the like.

Further, since the busbars 3 of the respective systems are wired in a plane, the wiring space becomes larger as the circuit scale increases, and the circuit scale is limited for the same reason as described above.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems. Most of the power supply system bus bars are three-dimensionally arranged on signal system wiring members to reduce the wiring space. It is an object of the present invention to provide a structure of a power supply module box of an electric connection box that can be used.

[0008]

In order to solve the above-mentioned problems, the present invention provides an electric junction box in which an insulating plate in which a power supply system and a signal system wiring member are routed is accommodated in a case. On the upper surface of the board, a box having a substantially inverted U-shaped cross-section in which busbars, which are most power supply wiring materials, are inner-molded, is attached, and the remaining power supply wiring materials obtained by arranging the power supply busbars on the insulating plate And a fuse and a relay connected to the inner-molded power system bus bar are attached to the inner surface of the box, and a power supply module box structure of an electric connection box is provided.

According to the present invention, most of the power supply system wiring material is separated from the power supply and signal system wiring materials arranged on the insulating plate, and the separated power supply system wiring material, ie, the bus bar, is substantially inverted U Inner molding in a box with a letter-shaped cross section, fuses and relays connected to the inner molded power supply busbar are attached to the inner surface of this box, this box is attached to the upper surface of the insulating plate, and the inner molded power supply busbar is attached. Connect to the power supply routing material left on the insulation board.

When the upper part of the box is projected from the opening of the case to the outside as in claim 2, only the upper part of the box protrudes from the case, and the entire electric connection box does not become bulky.

According to a third aspect of the present invention, when the press contact blades at both lower end portions of the power supply system bus bar are press contacted to the power supply system single core wire arranged on the insulating plate, the power supply system bus bar of the box and the power supply system of the insulating plate are connected. It can be easily and reliably connected to a single core wire that is a cord material.

According to a fourth aspect of the present invention, on the upper surface of the insulating plate,
By providing a drop-off preventing portion for holding a relay or the like attached to the inner surface of the box so as not to fall off, there is no possibility that a heavy relay or the like attached to the inner surface of the box may fall off due to running vibration or the like.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings.

As shown in FIG. 1, the electric junction box includes a lower case 11 and an upper case 12.
An insulating plate 14 on which a single-core wire 19 as a wiring material is routed is accommodated in the insides 1 and 12. When the insulating plates 14 are stacked in multiple stages, a bus bar can be routed on the lower insulating material. Further, a bus bar may be provided on the upper insulating plate 14 instead of the single core wire 19.

A power supply module box 21 having a substantially inverted U-shaped cross section is mounted on the upper surface of the upper insulating plate 14, and a power supply system single core wire 19 and a signal system single core wire 19 arranged on the upper insulating plate 14 are provided. Then, most of the power supply system single core wire 19 is separated, and the power supply system bus bar 20 is inner-molded into the box 21 in a substantially inverted U shape instead of the separated power supply system single core wire 19. The bus bar 20 that is inner-molded in the box 21 is three-dimensionally arranged above the signal single core wire 19 arranged on the insulating plate 14.

At the lower part of the box 21, a side protruding portion 21a is provided.
Is provided on the upper surface of the side projection 21a.
1b, and a terminal (tab) 20a raised from the power supply system bus bar 20 can be exposed in the connector fitting portion 21b. Also, as shown in FIG. 2A, the terminal of the relay 18 can be connected via the relay terminal 16 to the terminal 20a that has risen from the power supply system bus bar 20 of the side projection 21a.

As shown in FIGS. 3 (A) and 3 (B), the lower ends of the inner-molded power supply busbars 20 are projected downward from both lower sides of the box 21, respectively. When the box 21 is mounted on the upper surface of the insulating plate 14, the press-contact blade 20 b is disposed on the insulating plate 14.
By pressure contact, the power supply system single core wire 19 of the insulating plate 14 and the power supply system bus bar 20 of the box 21 are electrically connected.

As shown in FIG. 3C, the box 2
A terminal 20a, which has fallen from an inner-molded power supply system bus bar 20, protrudes from the upper inner surface of the power supply system 1 and a terminal 17c of a fuse 17 is connected to the terminal 20c via a relay terminal 16.
Connect a.

Further, as shown in FIG. 3D, a press-fit hole 20d may be formed in the terminal 20a, and the terminal 17a of the fuse 17 may be directly press-fitted into the press-fit hole 20d.

Further, as shown in FIG. 3E, a terminal hole 20e is formed in the inner-molded power supply system bus bar 20, and a terminal 17a of the fuse 17 is inserted into the terminal hole 20e and connected by soldering a. You may.

Similarly, as shown in FIGS. 2B and 4A, the upper inner surface of the box 21 may be connected to the terminal 18a of the relay 18 via the relay terminal 16 to the terminal 20a. .

Since the fuse 17 and the relay 18 are suspended in an inverted state, especially when the relay 18 is heavy and may fall off due to running vibration or the like, as shown in FIG. When another relay 18 or fuse 17 is attached to the upper surface of the insulating plate 14, the box 2
The first relay 18 can be prevented from falling off.

Further, as shown in FIG.
When mounting on the inner surface of the lower case 11, the relay 1
When the projection 11 a is provided on the inner surface of the lower case 11 directly below the lower case 8, it is possible to prevent the relay 18 of the box 21 from falling off.

As shown in FIG. 1, the upper case 12 is formed with an opening 12a for projecting the connector fitting portion 21b of the upper portion of the box 21 and the side projecting portion 21a to the outside of the upper case 12. .

As described above, most of the power supply system single core wire 1 is connected to the power supply system and signal system single core wire 19 routed on the insulating plate 14.
9 and a power supply bus bar 20 is replaced with a box 21 in place of the separated single core wire (or bus bar) 19 of the power supply system.
Inner box, and the box 21 is
The power supply system bus bar 20 having the inner mold is attached to the upper surface of the power supply system bus bar 20 by press-connecting to the power supply system single core wire 19 left on the insulating plate 14 with the press contact blade 20b. The power supply module box 21 is configured by connecting and attaching the fuse 17 and the relay 18 via the relay terminal 16 to the terminal 20a.

With this configuration, the box 21 is placed above the signal single-core wire or the bus bar, etc., routed on the insulating plate 14.
Most of the power supply busbars 20 that are inner-molded can be routed three-dimensionally, and the fuses 17 and relays 18 attached to the inner surface of the box 21 can be attached to the power supply busbars 20.
It is necessary to route around the single core wire and bus bar of each system on the upper surface of the insulating plate 14, especially the power source system single core wire having a large wire diameter and the wide power source bus bar for a large current. Since it is no longer available, you can reduce the routing space,
The size of the electric junction box is reduced, and the restriction on the circuit size is relaxed.

The power supply system bus bar 20 is connected to the box 21.
Since the inner mold is used, the insulation between the adjacent bus bars 20 is also improved.

Further, when the upper portion of the box 21 is projected outside through the opening 12a of the upper case 12, the upper portion of the box 21 only projects from the upper case 12, so that the entire electric connection box does not become bulky.

Furthermore, when the pressure contact blade 20b of the power supply system bus bar 20 is press-connected to the power supply system single core wire 19 of the insulating plate 14, the power supply system bus bar 20 of the box 21 and the power supply system single core wire 19 of the insulating plate can be easily and simply connected. You will be able to connect securely.

[0030]

As is apparent from the above description, in the structure of the power supply module box of the present invention, the box in which the power supply system bus bar is inner-molded is attached to the insulating plate, and the power supply system bus bar is left on the insulating plate. A fuse and a relay connected to this power supply busbar are attached to the inner surface of the box while being connected to the power supply wiring material. Since fuses and relays can be connected to the power supply system busbars that are routed, wiring materials for each system, especially power supply system single-core wires with a large diameter due to large current and wide power supply system busbars It is not necessary to route around the route, and the routing space can be reduced. As a result, the size of the electric junction box is reduced, and the limitation on the circuit size is relaxed.

When the upper part of the box is protruded to the outside from the opening of the case as in the second aspect, only the upper part of the box protrudes from the case, and the entire electric connection box does not become bulky. Further, when the pressure contact blades at both lower end portions of the power supply system bus bar are press-connected to the power supply system single core wire wired to the insulating plate, the power supply system bus bar of the box and the power supply system wiring material of the insulating plate are connected. The single-core wire can be easily and reliably connected.

Further, if a fall prevention portion is provided on the upper surface of the insulating plate so as to prevent a relay or the like attached to the inner surface of the box from falling off, a heavy relay or the like attached to the inner surface of the box may be provided. There is no danger of falling off due to running vibration or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view of a power supply module box of an electric connection box according to the present invention.

FIGS. 2A and 2B are perspective views of modified examples of the power supply module box.

3A is a perspective view of a main part of a power supply module box, FIG. 3B is a cross-sectional view of a connection structure between a bus bar of the power supply module box and a power supply system single-core wire of an insulating plate, and FIGS.
(E) is sectional drawing of the connection structure of each fuse.

4A is a cross-sectional view of a relay connection structure, and FIG.
FIG. 3 is a cross-sectional view of the structure for preventing the relay from falling off, and FIG.

FIG. 5 is a perspective view of a conventional electric junction box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Lower case 12 Upper case 14 Insulating plate 17 Fuse 18 Relay 19 Single core wire 20 Power supply system bus bar 20a Terminal 20b Pressure contact blade 21 Box

Claims (4)

[Claims] 1. An electric junction box in which an insulating plate in which power supply and signal wiring members are routed is accommodated in a case, wherein a busbar, which is a majority of the power supply routing material, is provided on an upper surface of the insulating plate. A box having a substantially inverted U-shaped cross-section in which the inner mold is attached is connected, and this power supply busbar is connected to the remaining power supply wiring members arranged on the insulating plate, while the inner mold of the box is subjected to the inner mold. A structure of a power supply module box of an electric connection box, wherein a fuse, a relay, and the like connected to a power supply system bus bar are attached. 2. The structure of a power supply module box of an electric junction box according to claim 1, wherein an upper portion of said box is projected outside from an opening of a case. 3. The power supply module box of an electric connection box according to claim 1, wherein the press contact blades at both lower ends of the power supply system bus bar are press contacted to a power supply system single core wire arranged on an insulating plate. Construction. 4. The electrical connection according to claim 1, further comprising a drop-off preventing portion provided on an upper surface of said insulating plate for holding a relay or the like attached to an inner surface of said box so as not to fall off. Box power module box structure.