JP2003304083A - Concentrated housing box for ecu - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize line saving of a wiring harness connected to a concentrated housing box for an ECU with suppressing increase of spaces of the concentrated housing box and installation when a plurality of ECU substrates are installed in a vehicle. <P>SOLUTION: A plurality of ECU substrates 15 are housed under a laminate state in a case 11, and bus bars 18 are inserted from slits 12 cut in an orthogonal direction to the substrate 15 on the external surface of the case 11, into the case 11. Circuit connection between each of the substrates 15 laminated via the bus bars 18 is realized by pressure contracting a plurality of pressure contact slots 18a projected at prescribed positions on the bus bars 18 to an end edge of each of the substrates 15, and the bus bars 18 form a power circuit and a ground circuit becoming common circuits to each of the substrates 15. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ECU centralized storage box, and more specifically, a plurality of ECUs that are distributed and arranged.
(Electronic control unit) is centrally housed in one housing box, and in particular, an optional ECU board is detachably housed in the housing box and the housed ECU boards can be connected to each other by a circuit. Is.

[0002]

2. Description of the Related Art Conventionally, a large number of ECUs for electronically controlling electric components mounted on an automobile are installed, and each ECU accommodates a board in a separate ECU case,
Brackets are provided on the U case and are fixed to the vehicle body. Most of the ECUs are arranged in an instrument panel, and each ECU is housed in a case.
The case brackets are attached individually to the structure of the instrument panel (phosphorus hose or part of the chassis).

When the connector on the wire harness side is fixed to the ECU case in a standby state and the optional ECU board is inserted later, as shown in FIG. 19, the connector 5 fixed to the inner surface of the case 1 is used. While pre-fitting the connector 6 of the wire harness W / H terminal to
A board-to-board connector 3a is mounted on the board 3 connected to the connector 5 via a jumper wire 4, and the ECU board 2 is slotted in later.

[0004]

In recent years, the number of electric components has increased rapidly due to the increasing value added of automobiles, and there are many optional electric components, and the ECUs for controlling these are also increasing accordingly. Since the installation space of these ECUs increases, it is becoming difficult to secure the space. In particular, since a plurality of ECUs are already mounted in the instrument panel, it is difficult to secure a space for mounting a new ECU. Further, if each ECU board is housed in each ECU case, there is a problem that the number of parts increases and the number of mounting steps increases, resulting in high cost.

Further, if an ECU case is provided for each ECU board, the power supply circuit (battery circuit, accessory circuit, ignition circuit) and ground circuit to each ECU board are common to a plurality of ECU boards. Instead, it is necessary to separately connect a wire harness to be a power supply circuit and a ground circuit to each ECU case. From this point as well, there is a problem that the amount of the wire harness is increased and the cost is increased, and the wiring harness is complicatedly arranged and the workability is deteriorated.

Further, as shown in FIG. 19, when the connector on the wire harness W / H side is fixed to the case 1 in a standby state in advance and the optional ECU board 2 is inserted later, a board is separately provided. There is also a problem that the board 3 having the to-board connector 3a, the jumper wire 4, and the like are required, which causes an increase in the number of parts.

The present invention has been made in view of the above problems, and suppresses an increase in the ECU case and the mounting space when mounting a plurality of ECU boards on a vehicle, and
Another object is to reduce the number of wire harnesses connected to a CU case, and to reduce the number of parts when the ECU board is inserted after fixing the connector of the wire harness terminal to the case. I am trying.

[0008]

In order to solve the above problems, the present invention provides a plurality of ECUs that accommodate a plurality of ECU boards (electronic control units) inside a case in a vertically stacked state or in a horizontally aligned state. An accommodation chamber is provided, and one ECU board is detachably inserted and locked in each of the ECU accommodation chambers, and a bus bar is arranged in a direction orthogonal to the ECU boards so as to cross one end side of the plurality of ECU accommodation chambers. Then
Plural pressure contact tabs are projected on the bus bar at intervals,
The edge of each of the ECU boards is inserted into the slots of these pressure contact tabs to make pressure contact connection with the conductor extending to the edge of each ECU board, and the circuit connection of the ECU board is performed via the bus bar. The ECU centralized storage box is provided.

According to the above structure, a plurality of ECU boards
Since they can be accommodated in one case, the number of cases can be reduced sharply and the installation space can be reduced. As a result, it becomes possible to install a new ECU in the vehicle body, particularly in a narrow instrument panel. At the same time, the number of parts can be reduced and the mounting work can be reduced, so that the cost can be reduced. Further, the electric connection between the ECU boards is performed by pressure-connecting the pressure-contact tabs of the bus bars arranged transversely to a plurality of ECU boards and the conductors of each ECU board without using a wire harness of an external circuit. Then, it can be done collectively in the case. Therefore,
It is possible to reduce the wiring of the wire harness, simplify the wiring, and improve the assembly workability.

In the above ECU centralized housing box, a plurality of the above-mentioned busbars are inserted through slits formed in parallel on the outer surface of the case, and these busbars are pressure-connected to the respective ECUs and conductors to form a common circuit. It is connected to the external power circuit and the external ground circuit.

When the slit is provided on the outer surface of the case as described above, the bus bar connecting the ECU circuits can be easily inserted from the outside of the case, and the bus bar corresponding to the circuit connection state of the ECU can be selected and attached. . Further, by connecting the bus bar to the external power supply circuit and the external ground circuit, the power supply circuit and the ground circuit of each ECU can be easily connected to the external power supply circuit and the external ground circuit, and the circuits can be shared.

On each of the ECU boards, a connector is mounted on the front end opposite to the bus bar connection side, an ECU case lid is attached to the front end opening of the case and closed, and the ECU case lid is connected to a wire harness terminal. An insertion hole for the connector is provided, and the connector on the wire harness side is fitted into the connector on the ECU board through the insertion hole.

With the above structure, the ECU board is first inserted into the ECU case, and the connector on the wire harness side connected to the accommodated ECU board is inserted into the ECU case lid and mounted on the ECU board. Can be directly connected with.

One end of the bus bar is projected to the outside of the case and is pressure-contacted with a bus bar housed in a junction box adjacent to the case.

That is, the ECU in the ECU central housing box
Since the bus bar connected to the board and the bus bar in the junction box that is adjacent to the board are directly pressure-connected, the circuit in the junction box and the circuit in the board in the ECU centralized housing box are connected via a wire harness. You can connect directly without having to. Further, since the ECU centralized housing box and the junction box are fixed, it is only necessary to provide the bracket for fixing the vehicle body on only one of them, and it is possible to reduce the number of parts and the fixing work to the vehicle body. .

Specifically, the locking portion protruding from the lower surface of the case of the junction box is slidably fixed to the locked portion protruding from the upper edge of the case of the ECU centralized storage box, and the upper surface of the case of the ECU. The junction box is mounted on the junction box, and the upper end portion of the vertical bus bar arranged on the ECU central housing box side is inserted into the pressure contact slot at one end of the bus bar protruding from the outer surface of the case of the junction box for pressure contact connection. It is configured to be.

That is, at the same time when the junction box is slidably fixed to the ECU centralized housing box, the upper end portion of the bus bar which protrudes outward from the ECU centralized housing box so that the busbar pressure contact slot projecting from the outer surface of the case of the junction box is automatically operated. Pressed. Therefore, it is not necessary to separately connect the bus bar of the internal circuit of the junction box and the bus bar for the common circuit on the ECU case side, and the workability of electrical connection can be improved.

Further, instead of the above-mentioned configuration in which the ECU board is first inserted into the ECU case and the connector on the wire harness side is connected to the ECU board, the connector on the wire harness side is previously attached to the ECU case side to form a standby connector. , When the ECU board is inserted into the ECU case, the ECU
The structure may be such that the connector mounted on the board is fitted. That is, the rear end of the ECU case is used as an opening on the ECU insertion side, while an opening for connector fitting is provided in the front end wall of the case, and the connector connected to the wire harness terminal is fitted and fixed in advance in the opening to wait the connector. And above E
A connector is mounted on the front end of the CU board, and when the ECU board is inserted into the case, it is fitted into the standby connector on the wire harness side.

With the above arrangement, since the connector on the wire harness side is previously fixed to the case of the ECU central housing box, the connector fitting is automatically performed at the time of inserting the ECU board, and the workability is improved. This is particularly suitable for a case where a wire harness manufacturer has assembled a wire harness in an ECU centralized storage box and an optional ECU board is additionally inserted after delivery to a car manufacturer.

In the structure in which the connector on the wire harness side is attached to the ECU case by waiting, the connector fitting opening provided on the front wall of the ECU case is cut out to one side end of the case and extends. Slide grooves are provided in the vertically opposite end edges of the above, and locking lock pieces projecting into the opening are provided by cantilever support, while a guide piece slidably contacting the slide groove is provided on the standby connector. A structure is provided in which a locked recess for locking the locking lock piece is provided, the standby connector is slid into the connector fitting opening, and the locking lock piece is locked in the locking recess in advance. It is preferable.

With the above structure, the connector on the wire harness side slides the guide piece into the slide groove through the side opening of the ECU case which is orthogonal to the fitting direction with the connector on the ECU board side to lock the lock. The piece can be easily fixed in a predetermined position where the piece engages with the engaging recess.
Also, since the slide groove is provided at the upper and lower edges of the opening of the case to be fixed by sliding, a general-purpose connector can be used as long as it has guide pieces on the upper and lower sides, and it is necessary to newly provide a new connector only for standby. Therefore, the cost of parts can be reduced.

The case is provided with an ECU case back cover that closes the opening at the rear end on the ECU insertion side, and the ECU case back cover may be integrally provided at the lower end on the rear end side of the case via a thin hinge. Good.

As described above, if the ECU case back cover can be opened and closed via the thin hinge, the ECU case back cover can be easily opened and closed even when the optional ECU board is inserted later. And the number of parts can be reduced.

At the insertion-side tips of the plurality of ECU boards, the recesses are cut out at different positions for each board, while ribs are projected on the inner surface of the case at positions corresponding to the recesses of the ECU boards. When the ECU board is inserted in the wrong position, it is preferable that the recess of the board does not fit into the rib so that the ECU board cannot be accommodated and the incorrect insertion of the ECU board is prevented.

With the above structure, when the ECU board is inserted into a predetermined regular position in the case, the recess is fitted in the rib and accommodated therein. On the other hand, if it is inserted in the wrong position, the recess cannot be fitted in the rib, the ECU board is not housed, and incorrect insertion can be reliably prevented.

The plurality of partition walls for partitioning the plurality of ECU accommodating chambers provided in the case may be provided with markings for identifying the ECU to be inserted on the end surface of the ECU board insertion side.

With the above arrangement, when the ECU board is inserted into the case, it is possible to see at a glance whether the marking matches the specific ECU board, and the operator inserts the ECU board in the correct position. Can know that. That is, if it is inserted in the wrong position, it can be visually recognized that the marking indicating the specific ECU board does not match the inserted ECU board, and the operator can know the incorrect insertion. Is the above E
It is conceivable to provide a notch on the end face of the partition wall on the insertion side so as to correspond to the recess cut at a different position for each CU substrate, or to color-code.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. 1 to 7 show a first embodiment. In the present embodiment, five ECU boards 15 are centrally housed in one ECU centralized housing box 10, and the ECU centralized housing box 10 is fixed to the junction box 20 and electrically connected. I am trying.

First, the ECU centralized storage box 10 will be described. As shown in FIG. 2, the ECU case 11 of the ECU centralized accommodation box 10 has an opening 11b on the front side and four partition walls 11e at equal intervals to form an ECU accommodation chamber 19 of five stages. ing. Rear surface 11 of ECU case 11
In a, a housing 13 that serves as a connection portion with a bus bar 24 of the junction box 20 described later is provided at the upper end so as to project, and an upwardly projecting portion of the housing 13 has an opening 13a at the front side.

As shown in FIG. 1, four slits 12 are cut out in parallel so as to longitudinally cut through the back surface 11a and the housing 13, and the upper end of each slit 12 is provided with a horizontal portion 12a bent in the horizontal direction. ing. ECU case 1
The side surface 11d of the first projection 11 projects the protrusion 14 in the front-rear direction toward the rear surface of the upper end, and the locking protrusion 1
4a is projected and the opening 11b of the side surface 11d is formed.
The lock claw 11d-1 is projected to the required position on the side.

The bus bar 18 is provided with four pressure contact tabs 18a at equal intervals from the insertion side edge, and is provided with a horizontal tab 18c in which an L-shaped upper end is bent in the horizontal direction. Further, a locking protrusion 18b is cut and raised at a required position on the side surface of the bus bar 18 so as to project.

The ECU board 15 has four conductor end portions 15a arranged in parallel at one end for connection with the press contact tabs 18a of the bus bar 18, and the other end to which a direct connector 16 connected to a conductor is fixed. Has been done. The five ECU boards 15 are different from each other. For example, a clearance sonar ECU (controls obstacle detection) and a leveling ECU.
(Headlight level adjustment according to the inclination of the vehicle body), gateway ECU (in-vehicle LAN control), auto wiper ECU (automatic detection wiper control) and the like are mixed.

The ECU case lid 17 that closes the opening 11b of the ECU case 11 has five rectangular insertion holes 17a, and the holding portion 17b of the ECU board 15 faces the inner surface of the cover side wall. The stepped portion is provided, and a locked portion 17c that locks with the lock claw 11d-1 of the box body 11 is provided at a required position.

Next, the junction box 20 will be described. The main body case 25 has an opening 25f on the front side, a plurality of connector accommodating portions 25a projecting on the back side, and locked claws 25b provided at required positions on both side surfaces. Two lock portions 25e for locking 27 are provided.

The laminated body 22 housed in the main body case 25
Is a stack of bus bars 24 and insulating plates 26 alternately,
As shown in FIG. 3, four pressure contact tabs 24a having pressure contact slots 24a-1 are formed on the second surface of the bus bar 24 from the rear side.
The insulating plate 23 on the rearmost side is provided with a tab protection portion 23a at a position corresponding to the pressure contact tab 24a.

The tab protection portion 23a has four slits 23a-3 cut out at equal intervals in the vertical direction, and the slot 23a-2 for inserting the horizontal tab of the other side is horizontally crossed. The slot 23a-2 has a taper portion 23a-1 that expands toward the tip side. That is, in the laminated body 22, the insulation plate 23 is placed on the backmost side so that the press contact tab 24a is inserted into the slit 23a-3 of the tab protection portion 23a.

The cover 21 which closes the opening 25f of the main body case 25 has a plurality of connector accommodating portions 21a protruding from the back side thereof, and a through hole 21c at a position corresponding to the tab protecting portion 23a of the laminated body 22. The lock claws 21b are provided on both sides.

Next, the assembly procedure will be described. First, the bus bar 18 is inserted into the slit 12 of the ECU case 11 of the ECU centralized housing box 10. At this time, bus bar 1
The horizontal tab 18c at the upper end of 8 is the horizontal portion 1 of the housing 13.
While being inserted into 2a, the locking protrusion 18b on the side surface is inserted into the slit 12 by forcibly inserting the bus bar 18.

Next, each ECU board 15 is attached to the ECU case 1.
1 is inserted into each ECU accommodating chamber 19 and, as shown in FIGS. 4 and 5, the ECU substrate 15 is pressure-contacted to the pressure-contacting slot 18a-1 of the pressure-contacting tab 18a of the bus bar 18, so that the conductor end 15a is pressure-contacted. The tab 18a is electrically connected. On this occasion,
As shown in FIG. 5, the locking protrusion 18b of the bus bar 18 is
Since the rib 11a-1 on the inner surface of the ECU case 11 is engaged, the above pressure contact is reliably performed.

Then, the ECU case lid 17 is put on the opening 11b side of the ECU case 11, and the locked portion 17c is locked and fixed to the lock claw 11d-1. In this state, the connector 30 connected to the end of the wire harness W / H is
Through the insertion hole 17a of the ECU case lid 17, the internal E
The direct mounting connector 16 of the CU board 15 is fitted and connected.

On the other hand, in the junction box 20, after the laminated body 22 of the bus bar 24 and the insulating plates 23 and 26 is accommodated in the main body case 25, the cover 21 is covered and the lock claw 21 is provided.
b is locked to the locked portion 25b. At this time, as shown in FIG. 7, the tab protection portion 23a is formed in the cover 21 through the through hole 21.
It penetrates through c and is projected to the outside.

The ECU centralized housing box 10 assembled as described above
And the junction box 20 are fixed to each other as follows. The junction box 20 is slid from the front in a state of being in contact with the upper surface 11c of the ECU centralized housing box 10. Then, the slide frames 25c and 25d on the side of the junction box 20 are slidably fitted to the ridges 14 on the side of the ECU centralized storage box 10, and the slide frames 25c and 25d are locked by the locking protrusion 14a.

At the same time, the junction box 2
The tab protection portion 23a on the 0 side is automatically inserted into the opening 13a of the housing 13 on the ECU central storage box 10 side. More specifically, as shown in FIGS. 4 and 5, the horizontal tab 18c of the bus bar 18 waiting in the opening 13 is inserted into the slot 23a-2 of the tab protection portion 23a, and at the same time,
Pressure contact slot 24a of pressure contact tab 24a of bus bar 24-
1 is pressure-welded. At this time, since the tip side of the tab protection portion 23a is the tapered portion 23a-1, the horizontal tab 18c can be smoothly picked up in the slot 23a-2, and the pressure contact connection with the pressure contact tab 24a can be ensured. Is going.

ECU integrated storage box 10 assembled as described above
The four busbars 18 therein form a battery circuit, an accessory circuit, an ignition circuit, and a ground circuit, which are common circuits of the five ECU boards 15, and each ECU board 15 and the busbar 24 are connected via the busbar 18. They are connected together.

In the junction box 20,
A bracket 27 for fixing the vehicle body is attached. As shown in FIG. 7, the bracket 27 is a separate body, and mounting portions 27 and 28 having bolt holes 27b-1 and 27c-1 are provided so as to project in directions orthogonal to each other, and the lock of the junction box 20 is provided on the lower surface. A locked portion 27a that locks with the portion 25e is provided. The bracket 27 is fixed to the junction box 20 with one touch by locking the locked portion 27a with the lock portion 25e.
That is, with one bracket 27, both the junction box 20 and the ECU centralized housing box 10 can be fixed to the vehicle body at the same time. The bracket 27 is fixed to the chassis behind the instrument panel, the phosphorus hose, or the like.

According to the above configuration, five different ECU boards 15 can be accommodated in one ECU centralized accommodation box 10, and the ECU centralized accommodation box 10 is fixed to the junction box 20 for fixing the vehicle body. Since the bracket is unnecessary, the number of parts can be reduced, the cost can be reduced, and the installation space on the vehicle body can be reduced.

In addition, a power supply circuit (battery circuit, accessory circuit, ignition circuit) and a ground circuit, which are common circuits, are connected to each of the five ECU boards 15 by a bus bar 18.
Since the wiring harnesses are commonly used and are collectively connected, the wire harness can be saved and the wiring can be simplified to improve the assembly workability.

Further, the junction box 20 is set to E
When slidingly fixed to the CU central storage box 10, the pressure contact tab 24a of the bus bar 24 and the horizontal tab 18c of the bus bar 18 are provided.
Since it is configured to be automatically pressure-welded, the number of working steps can be reduced, and the wire harness for electrically connecting the junction box 20 and the ECU central housing box 10 can be eliminated.

The ECU board 15 may be housed vertically in the ECU case. In that case, the bus bar may be horizontally crossed and the junction box may be arranged on the side surface of the ECU central housing box.

Next, FIGS. 8 and 9 show a second embodiment. The main difference from the first embodiment is that, instead of incorporating the junction box into the ECU centralized accommodation box 10 ', another ECU centralized accommodation box 40 is incorporated.

ECU case 1 of the ECU central housing box 10 '
1'is provided with a tab holding portion 49 having the same structure as the tab holding portion 23a of the first embodiment in the lower part of the slit 12 'of the back surface 11a, and L-shaped slide frames 45 on both lower surfaces.
Are provided facing each other. In addition, three partition walls 11e are arranged at equal intervals in the case, and four ECU accommodating chambers 19 are provided. Since other configurations are the same as those in the first embodiment, the same reference numerals are given and the description thereof will be omitted.

The bus bar 18 'includes a pressure contact tab 18a', a locking protrusion 18b ', and a horizontal tab 18 as in the first embodiment.
c'and has a pressure contact tab 18 at the lower end.
Another pressure contact tab 18d 'is provided so as to project in the direction opposite to the direction a.

The ECU case 41 of the other ECU centralized accommodation box 40 has only one partition wall 41e arranged in the case.
The structure is the same as that of the ECU centralized storage box 11 ′ except that two U accommodation chambers 19 are provided. That is, the housing 43, the slit 42, and the tab protection portion 46 are provided on the back surface of the case,
A slide frame 47 is projectingly provided on the lower surface, and projecting ridges 44 are projectingly provided on both upper ends. In addition, the bus bar 48 is also press-contact tab 4
The number 8a protrudes by two in correspondence with the number of the ECU accommodating chambers 19, and another pressure contact tab 48d is provided at the lower end in a direction opposite to the pressure contact tab 48a.

In the two ECU cases 11 'and 41, the busbars 18' and 48 are inserted into the slits 12 'and 42, respectively, and then the ECU board 15 is inserted into the ECU accommodating chamber 19, so that the busbars 18' and 48 are inserted. Pressure contact tabs 18a ', 48
The conductor end portion of the ECU board 15 is connected to the pressure contact slots 18a-1 and 48a-1 of a.

Next, the ECU centralized accommodation box 40 is slid from the front while being in contact with the upper surface 11c 'of the ECU centralized accommodation box 10, and the slide frame 47 of the ECU centralized accommodation box 40 is slid.
Is slid-fitted to the ridge portion 14 on the ECU centralized accommodation box 10 'side, and at the same time, the tab protection portion 46 on the ECU centralized accommodation box 40 side automatically enters the opening 13a of the housing 13 on the ECU centralized accommodation box 10' side. Inserted in. As a result, the press contact tab 48d of the bus bar 48 is press contact connected to the horizontal tab 18c 'of the bus bar 18'.

With the above configuration, the ECU centralized storage box 1
If either 0'or 40 is not required, one EC
It is possible to realize selective option settings such as not mounting the U centralized storage box together. Further, the ECU centralized storage boxes 10 ′, 40 include the ridges 14, 44 and the slide frame 4.
Since it has both 5 and 47, E
CU centralized storage boxes or junction boxes can be stacked and combined. In FIG. 9, the covers of the ECU cases 11 ′ and 41 are omitted and not shown,
A cover similar to that of the first embodiment is put on.

10 to 13 show the third embodiment.
The difference from the first embodiment is that the connector 30 connected to the terminal of the wire harness W / H is installed in the ECU central housing box 5 in advance.
It is fixed at 0 and waits for the ECU board 55 to be inserted. (Note that although the wire harness W / H is omitted in FIGS. 10 to 12 for ease of viewing, the wire harness W / H is actually connected to the connector 30 as shown in FIG. 13. .)

ECU case 51 of the ECU central storage box 50
Has a housing 53 projecting from the upper end on one side on the front surface 51b side, four vertical slits 52 are cut out on the housing 53 and the front surface 51b, and five large openings 57 are provided horizontally in five steps. ing.

The opening 57 is notched up to the middle of the side wall 51d, and the notched portion of the side wall 51b is inserted into the connector insertion port 5.
7b. The upper and lower edges 57c and 57d of the opening 57 have rail-shaped slide grooves 57c as shown in FIG.
-1, 57d-1 are recessed, and the upper edge 57c
A recess 57a is provided at the required position. At the upper end of the concave portion 57a, a locking lock piece 58 is projected in an inverted L-shape, and the free end 58a is formed while the free end 58a is formed.
A locking claw 58b is projected at the lower end of the vicinity.

The connector 30 connected to the terminals of the wire harness W / H is a general-purpose connector, and the upper and lower guide pieces 30a and 30b project from the upper and lower ends of the front surface of the housing, and the upper surface center is locked with the mating connector. It is equipped with a lock portion 30c.

An opening 51a is formed on the back side of the ECU case 51, and the ECU case back cover 54 is integrally connected to the lower end of the opening 51a through a thin hinge 54b.
A lock claw 54a that locks with the locked portion 51e of the side surface 51d of the ECU case 51 is provided at a corresponding position.
The ECU board 55 has a direct-attached connector 56 fixed to one end, which is connected to a conductor, and has four conductor end portions 15a on the side of the direct-attached connector 56 for connection with the press contact tabs 18a of the bus bar 18. They are in parallel.

The junction box 60 is the laminated body 6
Through hole 6 for inserting tab protection portion 63a protruding from 2
1c except that 5c is provided on the main body case 65 side
Since it is similar to the embodiment, the reference numerals are given and the description is omitted. The main body case 6 of the junction box 60
5 may be configured to be slidably fixed to the ECU case 51 of the ECU centralized housing box 50 as in the first embodiment, or may be integrally molded.

Next, the assembly procedure will be described. First, the bus bar 18 is forcibly inserted into the slit 52 of the ECU case 51 of the ECU central housing box 50. Next, the connector 30 connected to the wire harness W / H is connected to the ECU.
The connector is inserted into the connector insertion opening 57b of the case 51 from the side and fixed. Specifically, the upper and lower guide pieces 30a and 30b of the connector 30 are connected to the upper and lower edges 57c and 5c of the opening 57.
The slide groove 57c-1 and 57d-1 of 7d are slid and inserted, and as shown in FIG. 12, the locked recess 30d on the upper surface of the connector 30 is locked to the locking claw 58b of the locking lock piece 58. At this time, since the locking lock piece 58 has the free end 58a, it does not require much insertion force and can be locked smoothly and with one touch.

Then, as shown in FIG. 13A, the five connectors 3 connected to the terminals of the wire harness W / H are connected.
After all 0s are fixed to the opening 57 of the ECU case 51, the ECU board 55 is inserted from the opening 51a of the ECU case 51 from the direct-attachment connector 56 side. Then, the conductor end portion 55 a of the ECU board 55 is connected to the press contact tab 18 of the bus bar 18.
A is automatically pressure-welded and connected to the direct connector 56
Is also automatically fitted to the connector 30 in the standby state.
After accommodating the ECU board 55, as shown in FIG. 13B, the ECU case back cover 5 is provided with the thin hinge 54b as a fulcrum.
4 is moved as shown by an arrow in the drawing to cover the opening 51a of the ECU case 51 and close it.

The junction box 60 is EC
The fixing to the U centralized accommodation box 50 is the same as in the first embodiment, and the main body case 65 of the junction box 60 is fixed.
The tab protection portion 63 that projects further is provided in the ECU central storage box 50.
The bus bar in the junction box 60 is electrically connected to the bus bar 18 in the ECU central housing box 50 by inserting the bus bar 18 in the housing 53.

With the above arrangement, the wire harness W / H
Since the connector 30 on the side is fixed to the ECU case 51 in advance, the connector fitting is automatically performed with the insertion work of the ECU board 55, and the workability is improved. In particular, when the optional ECU board is additionally inserted after the ECU centralized housing box 50 is delivered to the car maker, the connector fitting work is not required just by inserting the ECU board.
It is suitable.

Further, since the slide grooves 57c-1 and 57d-1 are provided in the opening 57 of the ECU case 51 so as to be fixed by sliding, the connector 30 which is a general-purpose connector having the upper and lower guide pieces 30a and 30b is used. ,
Since the connector 30 can be fixed to the ECU case, it is not necessary to construct a new dedicated connector, and the number of parts can be reduced. Further, the connector 30 and the ECU case 51 are fixed between the upper and lower guide pieces 30a and 30b and the slide grooves 57c-1 and 57d-1, and the lock portion 30c of the connector 30 is a normal ECU.
Since it can be operated from the outside of the case 51, even with the above-described general-purpose connector, the lock can be released from the outside without using a special structure or another part for the case.

FIG. 14 shows a fourth embodiment. The difference from the third embodiment is that instead of providing a housing and a slit in the ECU case 51 ′, the busbar 18 ″ is previously housed in a separate ECU case back cover 54 ′, and the ECU
The point is that the busbar 18 ″ is connected to the ECU board 15 together with the case back cover 54 ′.

The ECU case back cover 54 'has an opening 5 on one side.
4a 'and the other side is a closed surface 54c', and a small opening 54b 'is provided at the upper end. The busbar 18 ″ is previously housed in the ECU case back cover 54 ′, the pressure contact tab 18a ″ is exposed to the opening 54a ′, and the upper horizontal tab 54b ′ is exposed to the small opening 54b ′. .

On the ECU case 51 'side, as in the third embodiment, the connector 30 connected to the end of the wire harness W / H is fixed in a standby state. At the same time when the ECU board 15 is inserted into the ECU case 51 ′,
The ECU case back cover 5 accommodating the bus bar 18 ″ after the direct-attached connector 16 of the board 15 is fitted to the connector 30
Put on 4 '.

Then, at the same time as the attaching operation of the ECU case back cover 54 ', the pressure contact tab 18 of the bus bar 18 "is attached.
The pressure contact connection between the a "and the ECU board 15 is automatically performed. At this time, since the back surface of the bus bar 18" is supported by the closing surface 54c 'of the ECU case back cover 54', the pressure contact connection is surely performed. be able to. Further, when the junction box 20 is mounted on the upper surface of the ECU case 51 ′ as in the first embodiment, the junction box 2
The 0-side tab protection portion 23a is pressure-contacted to the horizontal tab 18c ″ in the small opening 54b ′ of the ECU case back cover 54 ′.

15 to 18 show the fifth embodiment.
The main difference from the first embodiment is that the ECU case 71 has an E
When inserting the CU board 75, an erroneous insertion prevention function is provided to prevent the CU board 75 from being inserted at an incorrect position.

The ECU case 71 includes three different ECUs.
In order to accommodate the substrates 75, 76, 77, the partition wall 71e is provided in two stages to provide a three-stage ECU accommodation chamber. E
The ECU boards 75, 76, 7 are provided on the side surface of the CU case 71.
A guide rib 71d for sandwiching 7 is provided, and each of the ECU boards 75, 76, 7 is provided on the inner surface of the front surface 71b.
Ribs 71g, 71h, and 71i are provided at different positions in the horizontal direction at positions where 7 abuts.

The front surface 71b has a connector insertion portion 7
1c and the screw insertion portion 71 having insertion holes 71f-1 on both sides of the inner surface of the connector insertion portion 71c.
It has f. Further, in the rear side opening 71a of the ECU case 71, a marking 71j is cut out at a position corresponding to the concave portion 75a of the ECU board 75 accommodated in the rear end edge of the upper surface 71, and the partition wall 71 is provided.
Similarly, also on the rear end edge of e, marking is provided at a position corresponding to the recesses 76a and 77a of the ECU boards 76 and 77 housed in the step immediately below.

The ECU boards 75, 76, 77 fix the direct mount connector 78 in a state of being connected to the conductor at the front end of the board, and also the ribs 71g, 71h, 71i.
To the front end of the substrate at a position corresponding to the concave portions 75a, 76a, 77
Each a is cut out. Further, screw receiving portions 78a for screwing are provided on both sides of the direct-attaching connector 78.

Next, the operation of accommodating the ECU boards 75, 76, 77 will be described. When the ECU board 75 is inserted through the opening 71a of the ECU case 71, if the insertion position is correct, as shown in FIG.
Since the positions of the marking 71f and the marking 71f match, the operator can know that the ECU board 75 is inserted in the correct step. That is, if inserted in the wrong position, it is visually recognized that the recessed portion 75a and the marking 71j do not match, and the operator can know the incorrect insertion.

When the ECU board 75 (76, 77) is completely inserted, as shown in FIG. 16, the recess 75a (76a,
77a) fits on the ribs 71g (71h, 71i).
However, if the ECU boards 75, 76, 77 are inserted in the wrong positions, the recesses 75a, 76a, 77a will be replaced by the ribs 7.
Since the ECU boards 75, 76, 77 cannot be accommodated by not fitting the 1g, 71h, 71i, the ECU board 75,
Prevents erroneous insertion of 76 and 77. That is, in the present embodiment, the ECU boards 75, 76, 77 also reliably detect erroneous insertion both before and after insertion. Needless to say, only one of them (fitting between the rib and the recess, or marking) may be provided.

Then, the ECU board 7 inserted correctly
5, 76, 77 finally pass the screw N from the outside of the ECU case 71 through the insertion holes 71f-1 of the screw insertion portions 71f on both sides of the connector insertion portion 71c, and the ECU boards 75, 7
6 and 77 are screwed and fixed to the screw receiving portions 78a of the directly attached connectors 78.

[0079]

As is apparent from the above description, according to the present invention, a plurality of ECU boards can be accommodated in one case, the number of cases can be sharply reduced, and the installation space can be reduced. As a result, a new E for a small installation space
CU can be installed. At the same time, the number of parts can be reduced and the mounting work can be reduced, so that the cost can be reduced. Further, since the wire harness is not used for the electrical connection between the ECU boards, and the pressure contact tabs of the bus bars are collectively pressure contact connected to the board edge, the wire harness can be saved. At the same time, assembly workability is improved. Further, by connecting the bus bar to an external power supply circuit and an external ground circuit, the circuit formed by the bus bar can be used as a common circuit composed of the power supply circuit and the ground circuit, so that the circuit can be shared.

If a slit is provided on the outer surface of the case,
The bus bar connecting the ECU circuits can be easily inserted from the outside of the case, and the bus bar corresponding to the circuit connection state of the ECU can be selected and attached. Furthermore, by directly connecting the connector of the wire harness terminal to the connector mounted on the ECU board through the insertion hole of the ECU case lid, the ECU case lid does not need a special structure.

By slidingly fixing the adjacent junction boxes to the ECU central housing box, it is sufficient to provide a bracket for fixing the vehicle body on only one side, which reduces the number of parts and at the same time as the sliding fixation, By automatically press-contacting the press-contact slot of the bus bar protruding from the junction box to the upper end of the bus bar protruding from the ECU central housing box, the bus bar of the internal circuit of the junction box and the bus bar for the common circuit on the ECU case side are connected. It is not necessary to separate the connection work, the workability of electrical connection can be improved, and the wire harness for connection can be eliminated.

Alternatively, if the connector on the wire harness side is a holding connector that is fixed in advance to the case, the EC
Since the connector fitting is automatically performed with the work of inserting the U board, the workability becomes very good when the optional ECU board is inserted later. Further, if the ECU case back cover is integrated with the thin-walled hinge, the ECU case back cover can be freely opened and closed even when the ECU board is inserted later, improving workability and reducing the number of parts.

Since the standby connector is fixed to the case by the slide structure, it can be easily fixed without using a special structure or a separate part for the case, and the guide fits in the slide groove. A general-purpose connector can be used as long as it is a connector having one piece, and it is not necessary to newly provide a standby dedicated connector.

Further, the recesses at different positions are cut out at the insertion-side tips of the plurality of ECU boards, while the ribs are provided on the inner surface of the case at positions corresponding to the recesses. When it is inserted into the wrong position, the recess does not fit into the rib and the ECU board cannot be accommodated, so that the incorrect insertion can be prevented. Furthermore, if a marking for identifying the ECU to be inserted is attached to the end surface of the partition wall of the case on the board insertion side, the operator will insert the ECU board before inserting the ECU board into the case. You can know if the position is correct.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an ECU centralized housing box and a junction box according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing an assembly of an ECU central housing box and a junction box.

FIG. 3 is a perspective view of a laminated body in a junction box.

FIG. 4 is a cross-sectional perspective view of a main part of an ECU centralized storage box.

FIG. 5 is a cross-sectional view of a main part of an ECU centralized storage box.

FIG. 6 is a front view before the junction box is attached to the ECU centralized housing box.

FIG. 7 is a perspective view showing attachment of a bracket.

FIG. 8 is a perspective view of a second embodiment.

FIG. 9 is a cross-sectional view after assembly.

FIG. 10 is an exploded perspective view of a third embodiment.

FIG. 11 is a perspective view after the standby connector is attached.

FIG. 12 is a perspective view of an essential part.

13A and 13B are drawings for explaining insertion of an ECU board.

FIG. 14 is a sectional view of a fourth embodiment.

FIG. 15 is a partial cross-sectional perspective view of the fifth embodiment.

FIG. 16 is a schematic diagram illustrating fitting of a recess of the ECU board and a rib on the inner surface of the case.

FIG. 17 is a schematic diagram showing fixing of an ECU board to a case.

FIG. 18 is a perspective view of a main part when the ECU board is inserted into the case.

FIG. 19 is a perspective view of a main part of a conventional example.

[Explanation of symbols]

10 ECU central storage box 11 ECU case 12 slits 13 housing 14 Ridge portion (locked portion) 15 ECU board 16 Direct connector 17 ECU case lid 18 bus bars 20 junction box 21 cover 21c through hole 22 laminate 23, 26 Insulation plate 23 Tab protection 24 bus bars 24a Pressure contact tab 25 cases 25c, 25d slide frame (locking part) 27 bracket 30 connectors 30a, 30b guide piece 30d Locked recess 54 ECU case back 54b Thin hinge 57 openings 57c-1, 57d-1 slide groove 58 Locking piece 71g, 71h, 71i ribs 71j marking 75a recess W / H wire harness

   ─────────────────────────────────────────────────── ─── Continued front page    (71) Applicant 000003207             Toyota Motor Corporation             1 Toyota Town, Toyota City, Aichi Prefecture (72) Inventor Tetsuko Tanaka             1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi             Auto Network Technical Laboratory Co., Ltd. (72) Inventor Hiroki Hirai             1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi             Auto Network Technical Laboratory Co., Ltd. (72) Inventor Tomohiro Uchida             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Masahiko Onuma             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. F term (reference) 5E077 BB18 BB31 CC03 DD11 FF01                       JJ20                 5E348 AA03 DF01 EE02 EE10 EE29                       EF04 EF06 EF12 EF16 EF36                 5G361 BA01 BA02 BB01 BC02

Claims (10)

[Claims] 1. A plurality of ECU accommodating chambers for accommodating a plurality of ECU boards (electronic control units) in a vertically stacked state or in a horizontally parallel state are provided in the case, and one ECU is accommodated in each of the ECU accommodating chambers. While the board is detachably inserted and locked, E
A bus bar is arranged in a direction orthogonal to the CU board, and a plurality of pressure contact tabs are provided on the bus bar at intervals so as to project.
The edge of each of the ECU boards is inserted into the slots of these pressure contact tabs to be pressure-contacted with a conductor extending to the edge of each ECU board, and the circuit connection of the ECU board is performed via the bus bar. ECU centralized storage box characterized by. 2. A plurality of the bus bars are inserted through slits formed in parallel on the outer surface of the case, the bus bars are pressure-contacted with the respective ECUs to form a common circuit, and the bus bars are connected to an external power supply circuit and an external power supply circuit. The ECU central storage box according to claim 1, which is connected to an external earth circuit. 3. A connector is mounted on each of the ECU boards at a front end opposite to the bus bar connection side, and an ECU case lid is attached to the front end opening of the case to close the ECU board.
3. The ECU case lid is provided with an insertion hole for a connector connected to a wire harness terminal, and the connector on the wire harness side is fitted into the connector on the ECU board through the insertion hole. ECU central storage box. 4. One of the claims 1 to 3, wherein one end of the bus bar is projected to the outside of the case and pressure-connected to the bus bar housed in a junction box adjacent to the case. The ECU centralized storage box described. 5. The locking part projecting on the lower surface of the case of the junction box is slidably fixed to the locked part projecting on the outer edge of the upper end of the case of the ECU centralized storage box.
A junction box is mounted on the upper surface of the case of the CU, and at the time of mounting, the upper end portion of the bus bar in the vertical direction arranged on the ECU central storage box side is attached to the pressure contact slot at one end of the bus bar protruding from the outer surface of the case of the junction box. The ECU central storage box according to claim 3, wherein the ECU central storage box is configured to be inserted and pressure-connected. 6. The rear end of the case is used as an opening on the ECU insertion side, while an opening for connector fitting is provided on the front wall of the case, and a connector connected to a wire harness terminal is fitted and fixed in advance in the opening. 2. The ECU central housing box according to claim 1, wherein the ECU connector is mounted on a front end of the ECU board, and the ECU board is fitted into the standby connector on the wire harness side when the ECU board is inserted into a case. . 7. A connector fitting opening provided on the front end face of the case is cut out to extend to one side end of the case, and slide grooves are provided at the vertically opposed end edges of the opening. While providing a locking lock piece projecting in the opening, the standby connector is provided with a guide piece slidably in contact with the slide groove and a locked recess for locking the locking lock piece. 7. The ECU centralized storage box according to claim 6, wherein the ECU locking container is slidably inserted into the fitting opening, and the locking lock piece is locked in the locking recess and fixed in advance. 8. The case is provided with an ECU case back cover that closes an opening of the rear end on the ECU insertion side, and the ECU case back cover is integrally provided on the lower end of the case rear end side through a thin hinge. The ECU central storage box according to claim 7. 9. The insertion-side tips of the plurality of ECU boards are formed by notching the recesses at different positions for each board, while the inner surface of the case has ribs at positions corresponding to the recesses of the ECU boards. When the ECU board is inserted in the wrong position, the recess of the board does not fit into the rib so that the ECU board cannot be accommodated to prevent the incorrect insertion of the ECU board.
The ECU centralized storage box according to any one of claims 8 to 8. 10. A marking for identifying an ECU to be inserted is attached to an end surface of the plurality of partition walls for partitioning the plurality of ECU accommodating chambers provided in the case on the ECU board insertion side. The ECU centralized storage box according to claim 9.