JP2009148036A - Electric connection box for mounting on vehicle and connecting structure between electric connection box and electronic control unit in electric connection box for mounting on vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric connection box for mounting on a vehicle which can improve the manageability of a wire harness even if the position of a driver's seat is changed to right or left. <P>SOLUTION: The electric connection box for vehicle includes a pair of first and second projections (26 and 27) at the mutually facing flanks of an electronic control unit (4) shaped like a roughly rectangular box. A pair of first and second projections (26 and 27) are arranged synchronously about the central axis which passes therebetween, and a pair of first projections 26 and a pair of second projections 27 are arranged at mutually different intervals. The electric connection box (4), to which the electronic control unit is attached, includes supporting structures which are erected oppositely to receive the electronic control unit (4) and support the electronic control unit (4). The supporting structures are equipped with lock mechanisms which are arranged within guide grooves (28 and 29), which guide the projections (26 and 27), and lock the projections (26 and 27). <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

    The present invention relates to a vehicle-mounted electrical connection box and a connection structure between an electrical connection box unit and a vehicle electronic control unit in the vehicle-mounted electrical connection box.

    Various electric components such as a lamp, an ignition device, and a fuel control device are mounted on a vehicle such as an automobile, and an electronic control unit (ECU) for electronically controlling these electric components individually is also mounted. The electrical components are connected to a battery as a power source via a power wire, and the electrical components to be controlled and the sensors provided in each part are connected to an electronic control unit via a control signal wire. Yes. The power wire is extended as a vehicle wire harness inside the vehicle body and connected to the battery via a fuse for preventing overcurrent or a relay for turning on / off the current, and the signal wire is similarly wired. The harness extends in the vehicle body and is connected to the electronic control unit.

  A power fuse, relay, or the like is housed in a so-called automobile electrical connection box (junction box: referred to as JB) in order to improve maintainability. The electronic control unit is also referred to as a body control module (BCM), and is usually a circuit together with an arithmetic module such as a microcomputer (also referred to as CPU or MPU), a memory module such as ROM and RAM, and electronic components such as an interface. Arranged on the substrate.

  In the electronic control unit, a circuit board storage type in which the circuit board of the electronic control unit is stored in an electrical junction box for automobiles and a circuit board of the electronic control unit are accommodated in an independent casing, and this casing is the electrical junction box. There are assembly types that can be assembled to the unit. Here, the electronic control unit may be referred to as an electronic control unit when the circuit board is alone, or may be referred to as an electronic control unit in a state where the circuit board is housed in a housing. In either case, the automobile electrical junction box is fixed to the vehicle body, and the wire harness is connected to the fixed automobile electrical junction box.

In Patent Document 1 and Patent Document 2, a board on which electronic components such as a control microcomputer for an electronic control unit are placed is housed in one housing, and a semiconductor relay and a modularized fuse are provided in the housing. The former type of electrical junction box for automobiles is disclosed. In Patent Document 3, Patent Document 4, and Patent Document 5, an electronic control unit is prepared in which a board on which electronic components such as a control microcomputer are arranged is housed in a single housing different from the electrical junction box. A structure of an electric connection box is disclosed in which the electronic control unit is attached and fixed to the electric connection box unit.
JP 2003-18725 A JP2007-228757 JP-A-8-228418 JP2002-172640 5-60128

  In an electrical junction box for automobiles, a fuse or a relay is usually placed on one side of the electrical junction box (a so-called fuse mounting side) so that a fuse or a relay can be exchanged from the outside. . Therefore, in the storage type electrical junction box, the circuit board of the electronic control unit is accommodated in the electrical junction box. In addition, in the assembly type electrical junction box, it is assumed that the casing of the electronic control unit is attached and fixed to the other surface side (storage surface side) of the electrical junction box unit to constitute the electrical junction box. Such an electrical junction box is installed in the back of an instrument panel (instrument panel) on the driver's seat side of the car, and the storage surface side is fixed to the body so that the fuse mounting surface faces the vehicle interior side. In addition, the electrical connection box has a vertical direction determined from the time of design due to the layout of the vehicle.

  In the storage type, the storage surface side of the electrical connection box is fixed to the body of the automobile, and the electronic control unit is disposed on the storage surface side. Therefore, the wire harness connected to the electronic control unit is an electrical connection box. Are connected to each other and extended from the side of the electronic control unit. Further, in the assembly type electrical junction box, one side of the electronic control unit is attached to the storage side of the electrical junction box unit, and the other side is arranged on the body of the automobile. Also, one and the other surfaces corresponding to the upper and lower surfaces of the housing of the electronic control unit are not provided with a connection portion for connecting to the connector of the wire harness, and are connected to the side portions of the housing facing each other. Is provided. Usually, in an assembly-type electrical junction box, a front connection portion and a rear connection portion are provided in the front-rear direction of the vehicle on the casing side portion of the electronic control unit, and a wire harness connector extending from the front of the vehicle is provided. A connector of a wire harness that is connected to the front connection portion and extends from the rear of the vehicle is connected to the rear connection portion.

  In the assembly type electrical junction box structure described above, when the position of the driver's seat is changed to the left and right depending on the destination of the automobile, the installation position of the electrical junction box is also changed to the left and right. As a result, the electronic control unit mounted on the electrical junction box in which the vertical direction is determined is disposed in the opposite direction with respect to the vehicle longitudinal direction. That is, in the right-hand drive vehicle, the front connection portion and the rear connection portion are provided in the front-rear direction of the vehicle with the front connection portion and the rear connection portion being directed in the vehicle front-rear direction. The connecting portion is directed toward the rear of the vehicle, and the rear connecting portion is directed toward the front of the vehicle. As a result, the wire harness is preliminarily set to a length that gives an extra handling length assuming that the front connection portion may be directed toward the rear of the vehicle and the rear connection portion may be directed toward the front of the vehicle. In addition, it is necessary to route the long wire harness from the front to the rear of the electrical junction box or to route the long wire harness from the rear to the front of the electrical junction box. Further, the structure of the assembly type electric junction box described above has various effects such as vehicle layout and assemblability in designing the automobile.

  As described above, the separation-type electrical junction box structure has a problem in that the maneuverability is deteriorated and the vehicle layout, assemblability, and the wire harness length are greatly affected, and the position of the driver's seat is changed to the left and right. Therefore, there is a demand for an electrical junction box having a configuration that does not affect the handling of the wire harness of the electronic control unit even if the orientation of the electrical junction box is changed to the left and right.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide an electrical connection box for mounting on a vehicle that can improve the manageability of the wire harness even if the position of the driver's seat is changed to the left and right. It is another object of the present invention to provide a connection structure between an electric connection box unit and an electronic control unit in an electric connection box mounted on a vehicle.

  Another object of the present invention is to provide an electric connection box for mounting on a vehicle and an electric connection box for mounting on a vehicle, in which the wiring harness can be easily handled without giving an extra length to the wiring harness, and the vehicle layout and assemblability are improved. And providing an electronic control unit connection structure.

According to this invention,
In the electric junction box unit (4) for a vehicle on which the electronic control unit (2) having a substantially rectangular box shape can be mounted,
The electrical junction box unit (4) has a mounting structure for mounting electrical components on one side, and a receiving box structure (12) for receiving and fixing the electronic control unit (2) on the other side. Prepared,
The receiving box structure (12) includes a flat part (13) facing the mounted electronic control unit (2), and the electronic control unit (2) has first and second side surfaces facing each other. Provided with first and second support structure wall portions (16, 18) that are provided on the flat portion (13) so as to face each other and support the electronic control unit (2);
The first support structure wall (16) includes a pair of first guide grooves (28) for guiding a pair of first protrusions (26) provided on the first side surface, and the first guide grooves. (28) provided with a pair of first locking mechanisms (30) arranged to lock the pair of first protrusions (26), respectively, the first guide groove (28) and the first lock The mechanism (30) is symmetrically arranged with a first predetermined interval (W2) with respect to a reference axis (C) passing through the first and second support structure walls (16, 18),
The second support structure wall (18) includes a pair of second guide grooves (29) for guiding a pair of second protrusions (27) provided on the second side surface, and the second guide grooves. (29), provided with a pair of second lock mechanisms (30) that lock the pair of second protrusions (27), and include the second guide groove (29) and the second lock mechanism. (30) is symmetrically arranged with a second predetermined interval with respect to the reference axis (Rx), and the second predetermined interval is different from the first predetermined interval (W2). There is provided an electric junction box unit for a vehicle characterized by being set.

Moreover, according to this invention,
In a vehicular electrical junction box composed of a substantially rectangular box-shaped electronic control unit (2) and an electrical junction box unit (4) in which the electronic control unit (2) is assembled,
The electronic control unit (2)
First and second mounting surfaces opposed to each other mounted on the electrical junction box unit (4),
First and second side portions facing each other and passing through the central axis (Cx);
Third and fourth side portions facing each other;
A pair of first and second protrusions (26, 27) provided on the first and second side surfaces, respectively, and provided on the third and fourth side surfaces, to which a connector is connected from the outside. Power connectors (32, 34, 36),
The pair of first and second protrusions (27) are arranged symmetrically with respect to the central axis (Cx), and the pair of first protrusions (26) and the pair of second protrusions (27) are: Arranged at different intervals (W1, W2),
The electronic control unit (2)
A mounting structure for mounting electrical components on one side, and a receiving box structure (12) for receiving and fixing the electronic control unit (2) on the other side;
The receiving box structure (12) includes a flat portion (13) facing either the first mounting surface or the second mounting surface of the electronic control unit (2) mounted, and the electronic control unit (2) The first and second supports that support the electronic control unit (2) are provided on the flat portion (13) so as to be opposed to each other and have wall surfaces that abut against the first and second side surfaces. With structural walls (16, 18),
The first support structure wall (16) is disposed in a pair of first guide grooves (28) for guiding the pair of first protrusions (26) and the first guide grooves (28). And a pair of first locking mechanisms (30) for locking the pair of first protrusions (26), respectively, and the second support structure wall (18) includes the pair of second protrusions (27). A pair of second guide grooves (29) and a pair of second lock mechanisms (30) disposed in the second guide grooves (29) to lock the pair of second protrusions (27). An electrical junction box for a vehicle is provided.

  In the vehicle-mounted electrical junction box according to the present invention, the electronic control unit has the same shape, but the vehicle front-rear direction can be changed even if the orientation of the electrical junction box is changed to the left and right by changing the position of the driver's seat to the left and right. The direction of the connecting part of the electronic control unit directed to the is not fixed and is stored and fixed in the electric junction box unit. Therefore, the connector of the wire harness can be connected to the connection part of the electronic control unit at the shortest distance without affecting the handling of the wire harness. In addition, the vehicle-mounted electrical junction box according to the present invention has no restrictions on the layout, and can achieve cost reductions by sharing parts, downsizing, reducing the remaining length of electric wires, and the like.

  Hereinafter, referring to the drawings as necessary, a vehicle-mounted electrical junction box (referred to as a junction box: JB) and an electrical junction box unit in the vehicle-mounted electrical junction box according to an embodiment of the present invention A connection structure with the electronic control unit will be described.

  FIGS. 1A and 1B are exploded perspective views schematically showing an assembly-type electric connection box for mounting on a vehicle in a state in which the electronic control unit 2 is separated from the electric connection box unit 4 according to the embodiment of the present invention. FIG. 2 is a perspective view schematically showing an assembly-type electric connection box for mounting on a vehicle in which the electronic control unit 2 is housed in an electric connection box unit 4.

  FIGS. 1A and 1B are perspective views as seen from the body side of a vehicle (automobile). As shown in FIG. 1A, the electronic control unit 2 of the electric connection box for mounting on the vehicle is electrically connected. The electronic control unit 2 is directed to the box unit 4 and assembled to the electrical junction box unit 4 as shown in FIG. The assembly-type vehicle-mounted electrical junction box has a structure in which the electronic control unit 2 is assembled to the electrical junction box unit 4. The assembled electric connection box for mounting on a vehicle is fixed to a vehicle body (not shown) by anchor members 6 and 8 provided on the upper and lower sides of the electric connection box unit 4. The anchor member 6 is arranged and fixed below the vehicle body relative to the anchor member 8. The anchor members 6 and 8 are extended from the pedestal portions 6A and 8A and the pedestal portions 6A and 8A, and are provided with support portions 6B and 8B for supporting the electrical junction box unit 4. The pedestal portions 6A and 8A are screwed to the body, and the support portions 6B and 8B are engaged and fixed to engagement portions 10A and 10B provided on the upper and lower side portions of the electrical connection box unit 4. When the vehicle-mounted electrical junction box is removed from the vehicle body, the anchor members 6 and 8 remain fixed to the vehicle body, and the engagement between the support portions 6B and 8B and the engagement portions 10A and 10B is released. Thus, the electrical junction box unit 4 is removed from the anchor members 6 and 8.

  As shown in FIGS. 2 and 3, the electrical junction box unit 4 includes a box-shaped front side cover member 12 </ b> A made by integral molding and a bottomed frame-like back side cover member 12 </ b> B made by integral molding in the same manner. The engaging portion provided on the side wall of the back surface side lid member 12B is engaged with the engaging portion provided on the side wall of the front surface side lid member 12A to form the hollow box member (receiving box structure) 12. ing. The back surface side lid member 12B can be separated from the front surface side lid member 12A by releasing the engagement of the engaging portion with the locking portion.

  The front side cover member 12A includes a mounting structure for mounting electrical components such as an electrical connector, a relay, and a fuse on the outer surface side thereof. In the front side cover member 12A, an electrical connector (not shown), connection wiring, resistance, and the like are provided. The electrical parts are arranged. As for the electrical connector and electrical parts, electrical components such as connectors (not shown), relays, and fuses are mounted on the mounting structure on the front side of the front side lid member 12A. (Not shown), connected to relays and fuses. The electrical connector is connected to a relay, a fuse, and the like via a connection wiring provided in the front cover member 12A. In addition, after the electrical junction box unit 4 is fixed to the vehicle body, a power wire connector is mainly connected to the electrical connector with a mounting structure on the front side. This power wire extends into the vehicle body as a wire harness, is connected to a battery as a power source, and is connected to electrical components in each part of the vehicle (automobile).

  The engaging portions 10A and 10B described above are provided on the side portion of the front side lid member 12A, and attachment for attaching a lid (not shown) for closing the front side lid member 12A to the left and right sides thereof. Parts 20 and 22 are provided, and an insertion part of a lid is attached to the attachment part, and the connector, relay, and fuse are covered with the lid part so as not to be exposed to the outside. By removing the lid, a fuse or a relay can be exchanged from the outside.

  It should be noted that in FIG. 2, the contact terminals of the connector, the relays and fuses, and the contact terminals to which the relays and fuses are electrically connected are omitted and not shown.

  As shown in FIGS. 1A and 3, the back surface side lid member 12 </ b> B includes a substantially rectangular flat portion 13 that faces the surface of the electronic control unit 2, and a frame portion 14 provided on the outer periphery of the flat portion. It has. The frame portion 14 is formed in a rectangular shape suitable for receiving the electronic control unit 2, and support structure wall portions 16 and 18 for supporting and fixing the upper and lower side surfaces of the electronic control unit 2 are provided on the frame portion 14. It is integrated with the frame part 14 and is erected on the flat part 13. As shown in FIG. 3, the support structure wall portions 16 and 18 slidably receive a wall surface with which the left and right side surfaces of the electronic control unit 2 abut and a pair of protrusions 26 and 27 provided on the left and right side surfaces of the electronic control unit 2. Receivable grooves (first and second first guide grooves) 28, 29 are formed. As shown in FIGS. 3 and 4, an elastic claw portion 30 is extended in the receiving grooves 28 and 29, and the elastic claw portion 30 is disposed so that the hook-shaped tip portion 30A becomes a free end. The base portion 30 </ b> B of the claw portion 30 is integrally connected to the support structure wall portions 16 and 18. Here, the hook-shaped tip 30A and the pair of protrusions 26 and 27 constitute a snap coupling structure as a locking mechanism in the receiving grooves 28 and 29.

  When the electronic control unit 2 is fitted into the support structure walls 16 and 18 and pushed into the receiving grooves 28 and 29, a pair of protrusions 26 and 27 provided on the upper and lower side surfaces of the electronic control unit 2 are received by the receiving grooves 28. , 29 is guided (guided), and the hook-like tip portion 30A of the elastic claw portion 30 is pushed and bent to enter the receiving groove 28, 29 below the hook-like tip portion 30A. As a result, the protrusions 26 and 27 are engaged with the hook-shaped tip 30A, and the engagement between the hook-shaped tip 30A and the protrusions 26 and 27 is not released unless the elastic claw 30 is pushed and bent. Snap coupling is realized. In this state, as shown in FIG. 5, the electronic control unit 2 is supported between the support structure walls 16 and 18, and the electronic control unit 2 is disposed and fixed in the frame portion 14. In this state, the vehicle-mounted electrical junction box is fixed to the vehicle main body (not shown) by anchor members 6 and 8 provided above and below the electrical junction box unit 4. When the engagement between the hook-shaped tip 30A and the protrusions 26, 27 is released, a force is applied to the hook-shaped tip 30A from the outside to release the engagement with the protrusions 26, 27, and the receiving groove 28 By securing the escape paths for the protrusions 26 and 27 in the, 29, the electronic control unit 2 can be taken out from between the support structure wall parts 16 and 18 and the electronic control unit 2 can be taken out.

  Each of the snap coupling structure and the receiving grooves 28 and 29 has a reference axis in the vertical direction of the electrical junction box unit 4 on the electrical junction box unit 4, as will be apparent from the description of the arrangement of the protrusions 26 and 27 described later. 3 are provided symmetrically with respect to the central axis Rx shown in FIG. 3 extending in the vertical direction between the pair of receiving grooves 28 and between the pair of receiving grooves 29. Further, the snap coupling structure and the receiving grooves 28, 29 are a reference axis in the front-rear direction orthogonal to the central axis Rx, that is, the central axis Ry shown in FIG. Are arranged asymmetrically. Therefore, as shown in FIGS. 1 and 6, even if the electronic control unit 2 is reversed with the central axis Cx as the rotation axis, the electronic control unit 2 is supported between the support structure walls 16 and 18 by a snap coupling structure (lock mechanism). Can be locked. However, when the electronic control unit 2 is rotated and rotated about the axis Cy orthogonal to the central axis Cx, the projection 26 is guided into the receiving groove 29 and the projection 27 is guided into the receiving groove 28. Can not do. As a result, the electronic control unit 2 cannot be received between the support structure walls 16 and 18, and the electronic control unit 2 is prevented from being assembled to the electrical junction box unit 4.

  The electronic control unit 2 is formed in a sealed rectangular box-shaped case as shown in FIGS. 1A and 5, and in this case, it is also called an arithmetic module (CPU or MPU) such as a microcomputer. And a circuit board (not shown) on which memory modules such as ROM and RAM and electronic components such as an interface are mounted. The circuit board outputs a power supply terminal for supplying voltage (Vcc) to the electronic components and a control signal for controlling the electrical components of the vehicle, and also receives sensor signals from sensors provided in each part of the vehicle. An interface terminal is provided for connection to an input interface. In the case of the electronic control unit 2, as shown in FIGS. 1 (a) and 5, a terminal (not shown) connected to the power supply terminal of the circuit board is provided in the power connector portion 32 and the circuit. Signal connector portions 34 and 36 in which signal terminals (not shown) connected to the interface terminals of the board are provided are provided on the left and right side surfaces of the case. In the electronic control unit 2, as will be described later, the power connector portion 32 and one signal connector portion 34 are always directed toward the front F of the vehicle, and the other signal connector portion 36 is directed toward the rear R of the vehicle. It is attached to the electrical junction box unit 4 as described above. Therefore, a power wire connector branched from a wire harness (not shown) extending from the front F of the vehicle with reference to the position on the body to which the vehicle-mounted electrical junction box is fixed is connected to the power connector portion 32. A signal wire connector that is connected and branched from a wire harness (not shown) extending from the rear R of the vehicle is connected to the signal connector portion 34.

  As shown in FIGS. 1A and 5, in the electronic control unit 2, a pair of protrusions 26 are provided on one side surface (side surface directed upward) of the electronic control unit 2, and the other side surface. A pair of protrusions 27 is also provided on the (side face directed downward). The pair of protrusions 26 are arranged with a gap W1 and are provided on the side surface of the electronic control unit 2 symmetrically with respect to the central axis Cx of the electronic control unit 2. Accordingly, the distance between the pair of protrusions 26 from the central axis Cx is set to W1 / 2. Similarly, the pair of protrusions 27 are disposed with a gap W2 and are provided on the side surface of the electronic control unit 2 symmetrically with respect to the central axis Cx of the electronic control unit 2. Accordingly, the distance between the pair of protrusions 27 from the central axis Cx is set to W2 / 2. Since the pair of protrusions 26 is set to the interval W1, the interval between the pair of receiving grooves 28 that receive the pair of protrusions 26 and guide the pair of protrusions 26 is also set to the interval W1. Similarly, since the pair of protrusions 27 is set to the interval W2, the interval between the pair of receiving grooves 29 that receive the pair of protrusions 27 and guide the pair of protrusions 27 is also set to the interval W2. . A pair of receiving grooves 28 are provided symmetrically with respect to the reference axis Rx passing through the frame portion 14 for receiving the electronic control unit 2, and more specifically, the support structure wall portions 16 and 18 for supporting the electronic control unit 2. A receiving groove 28 is provided at a distance W1 / 2 from the reference axis Rx, a pair of receiving grooves 29 are provided symmetrically with respect to the reference axis Rx, and a pair of receiving grooves 29 are provided at a distance W2 / 2 from the reference axis Rx. It has been.

  In the vehicle-mounted electrical junction box shown in FIGS. 1A and 1B, the electronic control unit 2 is arranged for the right-hand drive vehicle and assembled to the electrical junction box unit 4. In the vehicle-mounted electrical junction box shown in FIGS. 1 (a) and 1 (b), the flat surface (RF) for the right-hand drive vehicle of the electronic control unit 2 is directed to the vehicle side, abutted against the vehicle body, and left A flat surface (LF) for the steering wheel is directed toward the passenger compartment. As a result, the signal connector portion 34 and the power connector portion 32 of the electronic control unit 2 are directed toward the front F of the vehicle. When the vehicle-mounted electrical junction box shown in FIGS. 1 (a) and (b) is changed to a left-hand drive vehicle, the electrical junction box as shown in FIGS. 1 (a) to 6 (a). The unit 4 is rotated around the axis Cx to change its direction, and the flat surface (LF) for the left-hand drive vehicle of the electronic control unit 2 is directed toward the vehicle side, abutted against the vehicle, and flat for the right-hand drive vehicle. The surface (RF) is directed toward the passenger compartment. As a result, the signal connector 34 and the power connector 32 of the electronic control unit 2 are directed toward the front F of the vehicle.

  In comparison between FIG. 1 (a) and FIG. 6 (a), the direction of the electric junction box unit 4 seems not to be changed at first glance, but a flat surface (RF) for a right-hand drive vehicle. Is changed to a flat surface (LF) for a left-hand drive vehicle, and the directions of the arrow F indicating the front of the vehicle and the arrow R indicating the rear of the vehicle are changed.

  The electric junction box unit 4 is changed for the left handle, and the electronic control unit 2 is rotated around the central axis Cx as shown in FIG. ) Is directed to the vehicle side and is fixed to the vehicle body in the same manner as described with reference to FIGS. 1 (a) and 1 (b). In this state, the signal connector portion 34 and the power connector portion 32 of the electronic control unit 2 are similarly directed toward the front F of the vehicle.

  The electronic control unit 2 includes a pair of protrusions 26 disposed at a distance W1 and a pair of protrusions 27 disposed at a distance W2 different from the distance W1. Accordingly, the electronic control unit 2 is erroneously rotated about the axis Cy orthogonal to the central axis Cx as the rotation axis, and the electronic control unit 2 is rotated about the central axis Cx, so that the surface (RF) for the right-hand drive vehicle is the vehicle. When the electronic control unit 2 is to be attached to the electric junction box unit 4 that is turned for the left-hand drive vehicle in a state of being directed to be in contact with the side, the pair of receiving grooves 29 having the interval W2 is The reception of the pair of protrusions 26 having W1 will be rejected. Similarly, the pair of reception grooves 28 having the interval W1 will refuse to receive the pair of protrusions 27 having the interval W2. As a result, it is possible to prevent the electronic control unit 2 from being attached to the electrical junction box unit 4 by turning the electronic control unit 2 upside down so that the wrong side faces the vehicle side.

  As described above, in the electrical connection box for mounting on a vehicle according to the present invention, since the direction of the electronic control unit to be mounted can be changed, it can be mounted on the vehicle without excessive wiring harness handling. . The connector of the wire harness connected to the electronic control unit is always set in the same direction with respect to the vehicle longitudinal direction. Thus, in order to make it a structure that can be mounted on the electric junction box unit even if the electronic control unit is inverted, the snap coupling structure is arranged symmetrically with respect to the central axis. Further, when the electronic control unit is assembled to the electric junction box unit, the snap coupling structure is provided asymmetrically with respect to the axis perpendicular to the central axis so that the vertical direction of the electronic control unit is not reversed. Since the vehicle-mounted electrical junction box has such a structure, a vehicle-mounted electrical junction box that is commonly used for both the left-hand drive specification and the right-hand drive specification of the vehicle is provided.

(A) And (b) is the exploded perspective view and electronic control unit which show roughly the assembly-type vehicle-mounted electrical connection box of the state which isolate | separated the electronic control unit from the electrical connection box unit which concerns on the Example of this invention FIG. 3 is a perspective view schematically showing an assembly-type electric connection box for mounting on a vehicle housed in an electric connection box unit. It is a perspective view which shows roughly the front side of the electrical junction box unit shown by Fig.1 (a) and (b). It is a perspective view which shows roughly the back side of the electrical junction box unit shown by Fig.1 (a) and (b). FIG. 4 is a cross-sectional view schematically showing a part of the electrical junction box unit for showing a snap coupling structure provided in the electrical junction box unit shown in FIGS. It is a perspective view which shows roughly the electrical junction box which should be attached to the anchor member shown by FIG.1 (b). (A) And (b) is the exploded perspective view and electronic control unit which show roughly the assembly-type vehicle-mounted electrical connection box of the state which isolate | separated the electronic control unit from the electrical connection box unit which concerns on the Example of this invention FIG. 3 is a perspective view schematically showing an assembly-type electric connection box for mounting on a vehicle housed in an electric connection box unit.

Explanation of symbols

  2. . . Electronic control unit, 4. . . Electrical junction box unit, 6,8. . . Anchor member, 6A, 8A. . . Pedestal, 6B, 8B. . . Support part, 10A, 10B. . . Engaging part, 12A. . . Front side cover member, 12B. . . Back side lid member, 13. . . Flat part, 14. . . Frame part, 16,18. . . Support structure walls, 20,22. . . Attachment part, 26,27. . . Protrusions 28, 29. . . Receiving groove, 30. . . Elastic claws, 30B. . . Base, 30A. . . Hook-shaped tip, 32. . . Power connector 34, 36. . . Signal connector

Claims (6)

In the electric junction box unit (4) for a vehicle on which the electronic control unit (2) having a substantially rectangular box shape can be mounted,
The electrical junction box unit (4) has a mounting structure for mounting electrical components on one side, and a receiving box structure (12) for receiving and fixing the electronic control unit (2) on the other side. Prepared,
The receiving box structure (12) includes a flat part (13) facing the mounted electronic control unit (2), and the electronic control unit (2) has first and second side surfaces facing each other. Provided with first and second support structure wall portions (16, 18) that are provided on the flat portion (13) so as to face each other and support the electronic control unit (2);
The first support structure wall (16) includes a pair of first guide grooves (28) for guiding a pair of first protrusions (26) provided on the first side surface, and the first guide grooves. (28) provided with a pair of first locking mechanisms (30) arranged to lock the pair of first protrusions (26), respectively, the first guide groove (28) and the first lock The mechanism (30) is symmetrically arranged with a first predetermined interval (W2) with respect to a reference axis (C) passing through the first and second support structure walls (16, 18),
The second support structure wall (18) includes a pair of second guide grooves (29) for guiding a pair of second protrusions (27) provided on the second side surface, and the second guide grooves. (29), provided with a pair of second lock mechanisms (30) that lock the pair of second protrusions (27), and include the second guide groove (29) and the second lock mechanism. (30) is symmetrically arranged with a second predetermined interval with respect to the reference axis (Rx), and the second predetermined interval is different from the first predetermined interval (W2). An electric junction box unit for a vehicle characterized by being set.     The receiving box structure (12) includes a frame portion (14) that receives a part of the electronic control unit (2) around the flat portion (13), and the frame portion (14) is integrated with the first portion. The electric junction box unit for vehicles according to claim 1, characterized in that the first and second support structure wall portions (16, 18) are formed.     The first and second locking mechanisms (30) are respectively erected on the flat portion (13), and the hook-shaped tips are engaged with the first and second protrusions (26, 27), respectively. The vehicular electrical junction box unit according to claim 1, further comprising an elastic claw portion (30) having a portion (30A). In a vehicular electrical junction box composed of a substantially rectangular box-shaped electronic control unit (2) and an electrical junction box unit (4) in which the electronic control unit (2) is assembled,
The electronic control unit (2)
First and second mounting surfaces opposed to each other mounted on the electrical junction box unit (4),
First and second side portions facing each other and passing through the central axis (Cx);
Third and fourth side portions facing each other;
A pair of first and second protrusions (26, 27) provided on the first and second side surfaces, respectively, and provided on the third and fourth side surfaces, to which a connector is connected from the outside. Power connectors (32, 34, 36),
The pair of first and second protrusions (27) are arranged symmetrically with respect to the central axis (Cx), and the pair of first protrusions (26) and the pair of second protrusions (27) are: Arranged at different intervals (W1, W2),
The electronic control unit (2)
A mounting structure for mounting electrical components on one side, and a receiving box structure (12) for receiving and fixing the electronic control unit (2) on the other side;
The receiving box structure (12) includes a flat portion (13) facing either the first mounting surface or the second mounting surface of the electronic control unit (2) mounted, and the electronic control unit (2) The first and second supports that support the electronic control unit (2) are provided on the flat portion (13) so as to be opposed to each other and have wall surfaces that abut against the first and second side surfaces. With structural walls (16, 18),
The first support structure wall (16) is disposed in a pair of first guide grooves (28) for guiding the pair of first protrusions (26) and the first guide grooves (28). And a pair of first locking mechanisms (30) for locking the pair of first protrusions (26), respectively, and the second support structure wall (18) includes the pair of second protrusions (27). A pair of second guide grooves (29) and a pair of second lock mechanisms (30) disposed in the second guide grooves (29) to lock the pair of second protrusions (27). An electrical junction box for vehicles.     The receiving box structure (12) includes a frame portion (14) that receives a part of the electronic control unit (2) around the flat portion (13), and the frame portion (14) is integrated with the first portion. 5. The electric junction box for vehicles according to claim 4, wherein the first and second support structure walls (16, 18) are formed.     The first and second locking mechanisms (30) are respectively erected on the flat portion (13), and the hook-shaped tips are engaged with the first and second protrusions (26, 27), respectively. The electric junction box for vehicles according to claim 4 provided with an elastic claw part (30) which has a section (30A).

Images