Electronic control unit

Abstract

To provide an electronic control unit which restrains excessive load from being applied to a wiring inside a main body while separating a connector from a main body via the wiring.SOLUTION: An electronic control unit 1 includes a plurality of wirings 30 whose first terminals 30a are connected to a plurality of terminals 20, a connector 40 to which second terminals 30b of the plurality of wirings 30 are connected, a wiring stand 50, a first cover 60, and a second cover 70. The wiring stand 50 includes a wiring support stand 55 that is provided on a wiring surface 51a side and has an outer surface 55b that faces at least a part of an inner surface 72c of a second frame portion 72 in a range where at least an opening edge 72b is provided, and a guide plate 56 that is continuous with an outer surface 55b and has a guide surface 56a that partially faces the opening edge 72b. Each wiring 30 is drawn out from a terminal stand 54 to the outside of the second cover 70 through a first spatial region S1 sandwiched between the outer surface 55b and the inner surface 72c, and a second spatial region S2 sandwiched between the opening edge 72b and the guide surface 56a.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an electronic control unit.

Background Art

[0002] Conventionally, vehicles such as automobiles are equipped with an electronic control unit used for controlling various functions. As a technology related to an electronic control unit, Patent Document 1 discloses a technology related to a vehicle electronic control device including an electronic circuit and a connector for electrically connecting the electronic circuit to an external circuit on a printed circuit board.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the electronic control device disclosed in Patent Document 1, since the connector is arranged on the printed circuit board, the electric wire on the external circuit side (hereinafter referred to as "external electric wire") is routed to the main body of the electronic control device. Such concentration of external electric wires to the electronic control device may cause problems such as swelling of the external electric wires around the main body, and as a result, the living space in the vehicle compartment may be compressed.

[0005] On the other hand, by extending a plurality of wirings from the inside to the outside of the electronic control unit, it is also conceivable to separate a plurality of connectors from the main body of the electronic control unit and make it difficult to cause swelling of the external electric wires around the main body. However, in such an electronic control unit, when the connector on the electronic control unit side is fitted to the external connector on the external circuit side, it may be pulled, and as a result, an excessive load may be applied to the wiring inside the main body.

[0006] The present invention has been made in view of the problems of such prior art. The object of the present invention is to provide an electronic control unit that suppresses an excessive load on the wiring inside the main body while separating the connector from the main body via the wiring.

Means for Solving the Problems

[0007] An electronic control unit according to an aspect of the present invention includes a substrate on which electronic components are mounted, a plurality of terminals having a first end connected to the substrate, a plurality of wirings having a first terminal connected to any of the second ends on the side opposite to the first ends of the plurality of terminals, a connector having a second terminal on the side opposite to the first terminal connected to the plurality of wirings, a flat wiring base having a plurality of terminal blocks that are arranged in parallel with the substrate and support a part of the second ends on the side of the wiring surface opposite to the back surface facing the substrate, a first cover having a first flat plate portion covering the substrate and a first frame portion continuous with the edge of the first flat plate portion, a second cover having a second flat plate portion covering the wiring base and a second frame portion continuous with the edge of the second flat plate portion, and the second cover is combined with the first cover by engaging a part of the second frame portion with a part of the first frame portion. A part of the leading edge of the second frame portion is an opening edge that is separated from the leading edge of the first frame portion in the combination direction of the first cover and the second cover. The wiring base has a wiring support base provided on the side of the wiring surface and having an outer surface facing a part of the inner surface of the second frame portion in at least the range where the opening edge is provided, and a guide plate continuous in a direction perpendicular to the outer surface of the wiring support base and having a guide surface with a part facing the opening edge in the combination direction. Each wiring is drawn out from the terminal block to the outside of the second cover through a first space region sandwiched between the outer surface of the wiring support base and the inner surface of the second frame portion and a second space region sandwiched between the opening edge and the guide surface.

Effects of the Invention

[0008] According to the present invention, it is possible to provide an electronic control unit that suppresses an excessive load on the wiring inside the main body while separating the connector from the main body via the wiring.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0010] Hereinafter, an electronic control unit according to an embodiment will be described in detail with reference to the drawings. Here, the term "electronic control unit" will be abbreviated as "ECU" hereinafter. ECU is an abbreviation for Electronic Control Unit. Note that the dimensional ratios in the drawings are exaggerated for convenience of explanation and may be different from the actual ratios.

[0011] FIG. 1 is a perspective view of an ECU1 according to an embodiment. FIG. 2 is a partial exploded view of the ECU1 with the first cover 60 and the second cover 70, which are covers, separated. FIG. 3 is an exploded view of the circuit unit 3 included in the ECU1.

[0012] The ECU1 is mounted on a vehicle such as an automobile and controls various functions. The ECU1 includes a substrate 10, a plurality of terminals 20, a plurality of wirings 30, a plurality of connectors 40, a wiring harness base 50, a first cover 60, and a second cover 70.

[0013] Here, in the present embodiment, a unit composed of the substrate 10, a plurality of terminals 20, a part of the plurality of wirings 30, the wiring support 50, the first cover 60, and the second cover 70 is referred to as the "main body 2". Also, a unit composed of the substrate 10, a plurality of terminals 20, a plurality of wirings 30, a plurality of connectors 40, and the wiring support 50 is referred to as the "circuit unit 3".

[0014] The substrate 10 is, for example, a printed circuit board (PCB: Printed Circuit Board) on which a plurality of electronic components 11 are pre-mounted. Examples of the plurality of electronic components 11 include a CPU (Central Processing Unit) and a memory. In the present embodiment, the substrate 10 is regarded as a rectangular flat plate that is parallel to the virtual XY plane defined by the X direction and the Y direction orthogonal to each other, and has two end sides along the X direction and two end sides along the Y direction.

[0015] Each of the plurality of terminals 20 electrically connects one of the wirings 30 to a predetermined circuit on the substrate 10. Each terminal 20 is a flat and bar-shaped metal member. Each terminal 20 has a first end 20a (see FIG. 4), which is one end, and a second end 20b, which is the other end opposite to the first end 20a. The first end 20a is connected to a predetermined circuit on the substrate 10. In the present embodiment, since the substrate 10 is regarded as a flat plate parallel to the XY plane, each terminal 20 is arranged on the mounting surface 10a so as to protrude along the Z direction orthogonal to both the X direction and the Y direction. The second end 20b connects the second terminal 30b of one of the wirings 30. The second end 20b includes, for example, two protruding pieces parallel to each other, and the core wire of the wiring 30 can be sandwiched between the two protruding pieces to simply connect the second terminal 30b.

[0016] The plurality of wirings 30 each electrically connect one of the connectors 40 and one of the terminals 20. Each wiring 30 is an electric wire in which a core wire, which is a conductor, is coated with an insulator. Each wiring 30 has a first terminal 30a that is one end and a second terminal 30b that is the other end on the side opposite to the first terminal 30a. The first terminal 30a is connected to one of the second ends 20b of the terminal 20. The second terminal 30b is connected to the connector 40. Note that for both the first terminal 30a and the second terminal 30b, the part that actually contacts the second end 20b or the connector 40 is a part of the core wire where the insulator is peeled off and partially exposed.

[0017] The plurality of connectors 40 are connected to an external connector (not shown). In the present embodiment, the ECU 1 is provided with, as an example, three connectors 40, namely, a first connector 40a, a second connector 40b, and a third connector 40c. The second terminal 30b for each wiring 30 is connected to one of the first connector 40a, the second connector 40b, or the third connector 40c. In particular, each connector 40 is not directly installed on the substrate 10 and is connected to the main body 2 of the ECU 1 only via the wiring 30.

[0018] The wiring guide 50 routes each wiring 30 while connecting the first terminal 30a to the corresponding terminal 20 for each wiring 30 inside the main body 2. The wiring guide 50 is, for example, made of synthetic resin and is a flat member arranged parallel to the substrate 10. Since the wiring guide 50 is maintained in a posture so as to be laminated on the substrate 10, it can also be referred to as a "wiring layer". The wiring guide 50 has a base portion 51, side wall portions 52, pedestal portions 53, a plurality of terminal blocks 54, a wiring support base 55, and a guide plate 56.

[0019] The base portion 51 is a plate portion facing the substrate 10 in the Z direction. The planar shape of the base portion 51 is equivalent to the planar shape of the substrate 10. One surface of the base portion 51 is a wiring surface 51a on which a part of each wiring 30 is routed. The other surface of the base portion 51 is a back surface 51b (see FIG. 4) that is on the side opposite to the wiring surface 51a and faces the substrate 10.

[0020] The side wall portion 52 is continuous with the edge portion of the base portion 51 and protrudes in a direction opposite to the side facing the substrate 10 along the Z direction so as to surround the wiring space on the wiring surface 51a. However, the side wall portion 52 is not in a frame shape surrounding the entire four sides as referred to in the present embodiment, but is continuous with at least one wiring support base 55.

[0021] The pedestal portion 53 is continuous with the edge portion of the base portion 51 and protrudes along the Z direction so that at least a part thereof contacts the outer edge portion of the mounting surface 10a of the substrate 10. Thereby, the distance between the base portion 51 and the substrate 10 is maintained constant.

[0022] The plurality of terminal blocks 54 are provided on the side of the wiring surface 51a and support a part of the second end portion 20b in an exposed state. The arrangement of each terminal 20 depends on the circuit configuration on the mounting surface 10a of the substrate 10. Therefore, the arrangement of each terminal block 54 on the wiring surface 51a is also determined based on the circuit configuration of the substrate 10. Each terminal block 54 has an opening groove 54a (see FIG. 4) for exposing a part of the second end portion 20b of the terminal 20. For each wiring 30, a part of the first terminal 30a is inserted into a predetermined opening groove 54a, whereby the core wire of the first terminal 30a is connected to the second end portion 20b.

[0023] FIG. 4 is a partial cross-sectional view showing the periphery of the portion where the wiring 30 is drawn out from the main body 2 corresponding to the IV-IV cross-section in FIG. 1. FIG. 5 is a partial plan view of the periphery of the portion where the wiring 30 is drawn out from the wiring base 50 as viewed in a direction opposite to the Z direction. FIG. 6 is a partially enlarged view of a part of the upper end portion 55a corresponding to the VI portion in FIG. 5.

[0024] The wiring support base 55 supports a part of the wiring 30 and forcibly changes the routing path of the wiring 30 inside the main body 2. The wiring support base 55 is a convex portion provided at least one on the outer edge of the wiring base 50 and on the side of the wiring surface 51a. In the present embodiment, the wiring base 50 has three wiring support bases 55, one wiring support base 55 extending along the Y direction and two wiring support bases 55 extending along the X direction. When routing the wiring 30, it is not always necessary to use all the wiring support bases 55. In the present embodiment, a case where all the wirings 30 are drawn out from the main body 2 along the X direction via one wiring support base 55 is illustrated. Each wiring support base 55 has an upper end portion 55a, an outer surface 55b, and an inner surface 55c.

[0025] The upper end portion 55a is the portion of the wiring support base 55 that is most spaced apart from the wiring surface 51a in the Z direction. When the ECU 1 is assembled, the upper end portion 55a faces the second flat plate portion 71 of the second cover 70.

[0026] Further, as shown in FIG. 6, the upper end portion 55a has a plurality of holding portions 55d that sandwich and hold the side surfaces of each wiring 30. Each holding portion 55d may be a rib that sandwiches the side surface of the wiring 30 in a state where the wiring 30 passes along the direction of drawing the wiring 30 from the main body 2 to the outside, that is, the X direction in this example. In this case, the upper end portion 55a may be a set of a plurality of groove portions corresponding to each wiring 30. Hereinafter, the width of one groove portion constituting the upper end portion 55a is denoted as "first width W1". Each groove portion is formed along the drawing direction of the wiring 30. And all the groove portions are arranged along the extending direction of the wiring support base 55, that is, the Y direction in this example. By setting the first width W1 to be larger than the outer diameter D of the wiring 30, the routing of the wiring 30 to the upper end portion 55a can be facilitated. On the other hand, for each groove portion, a pair of ribs facing each other are provided as the holding portion 55d. Hereinafter, the width between the ribs facing each other is denoted as "second width W2". By setting the second width W2 to be smaller than the outer diameter D of the wiring 30, the ribs engage with the intermediate portion 30c of the wiring 30 located at the upper end portion 55a, and the displacement of the wiring 30 with respect to the upper end portion 55a is suppressed.

[0027] The outer surface 55b is the side surface in the direction from the cable routing base 50 to the outside. Specifically, the outer surface 55b faces a part of the inner surface 72c of the second frame portion 72 in the range where at least the opening edge 72b is provided in the second cover 70. On the other hand, the inner surface 55c is the side surface in the direction toward the inside of the cable routing base 50, that is, the cable routing space where a plurality of terminal blocks 54 are provided.

[0028] The guide plate 56 is continuous in a direction perpendicular to the outer surface 55b of the wiring support base 55 and protrudes outward from the cable routing base 50. In the example of the present embodiment, the outer surfaces 55b of each wiring support base 55 all extend along the Z direction. In this case, the guide plate 56 of each wiring support base 55 is continuous with the outer surface 55b in either the X direction or the Y direction, which is perpendicular to the Z direction. In the present embodiment, the guide plate 56 is parallel to the base portion 51.

[0029] Further, the guide plate 56 has a guide surface 56a, a part of which faces a part of the second cover 70. Specifically, a part of the guide plate 56 faces the opening edge 72b of the second cover 70 in the Z direction.

[0030] The first cover 60 and the second cover 70 are combined with each other to accommodate at least the substrate 10, the plurality of terminals 20, and the cable routing base 50 included in the circuit unit 3. The first cover 60 and the second cover 70 may be made of, for example, synthetic resin or metal.

[0031] The first cover 60 is a cover assembled from the side facing the substrate 10. The first cover 60 has a first flat plate portion 61 that covers the substrate 10 and a first frame portion 62 that is continuous with the edge of the first flat plate portion 61. The first frame portion 62 protrudes, for example, along the Z direction, which is the direction of assembly with respect to the second cover 70 so as to surround the substrate 10. In the present embodiment, a part of the leading edge 62a of the first frame portion 62 contacts the surface of the cable routing base 50 on the side opposite to the guide surface 56a of the guide plate 56.

[0032] The second cover 70 is a cover assembled from the side facing the wiring surface 51a of the wiring base 50. The second cover 70 has a second flat plate portion 71 that covers the wiring base 50 and a second frame portion 72 that is continuous with the edge of the second flat plate portion 71. The second frame portion 72 protrudes, for example, along a direction opposite to the Z direction, which is the direction in which it is assembled to the first cover 60, so as to surround at least a part of the wiring base 50. In the present embodiment, a part of the leading edge 72a of the second frame portion 72 is an opening edge 72b that is spaced apart from the leading edge 62a of the first frame portion 62 in the Z direction. The opening edge 72b corresponds to the range where the outer surface 55b of the wiring support base 55 is provided on the wiring base 50 as described above. In the present embodiment, since three wiring support bases 55 are provided on the wiring base 50, there are also three opening edges 72b on the second cover 70.

[0033] Also, the first cover 60 has a plurality of first locking portions 63 on the first frame portion 62. On the other hand, the second cover 70 has a plurality of second locking portions 73 on the second frame portion 72. The second cover 70 is combined with the first cover 60 by engaging the second locking portions 73 with the first locking portions 63.

[0034] Next, with reference to FIG. 4, the wiring route of the wiring 30 around the wiring support base 55 will be described.

[0035] When the ECU 1 is assembled, a first space region S1 is formed around the opening edge 72b of the second cover 70 and is sandwiched between the outer surface 55b of the wiring support base 55 and the inner surface 72c of the second frame portion 72 of the second cover 70. The first space region S1 is a part of the wiring route of the wiring 30 and extends along the Z direction corresponding to the combination direction of the first cover 60 and the second cover 70. Also, the first space region S1 is a narrow space such that the wiring of the wiring 30 is not hindered. For example, if the distance between the outer surface 55b and the inner surface 72c is the first interval C1, it is desirable that the first interval C1 is larger than the value of the outer diameter D of the wiring 30 and smaller than twice the value of the outer diameter D.

[0036] Also, when the ECU 1 is assembled, a second space region S2 is formed around the opening edge 72b of the second cover 70, which is sandwiched between the opening edge 72b and the guide surface 56a of the wiring support base 50. The second space region S2 is a part of the wiring path of the wiring 30 and extends along either the X direction or the Y direction orthogonal to the Z direction. Also, similar to the first space region S1, the second space region S2 is a narrow space where the wiring of the wiring 30 is not obstructed. For example, if the distance between the opening edge 72b and the guide surface 56a is defined as the second interval C2, it is desirable that the second interval C2 be set to be larger than the value of the outer diameter D of the wiring 30 and smaller than twice the value of the outer diameter D.

[0037] When the wiring path of the wiring 30 around the wiring support base 55 is set as described above, assume the stage where the circuit unit 3 is already assembled to the first cover 60 when the operator assembles the ECU 1. At this time, the intermediate portion 30c of each wiring 30 is supported by the upper end portion 55a of the wiring support base 55, but the second cover 70 has not been assembled yet. Therefore, a part of the wiring 30 from the intermediate portion 30c toward the second terminal 30b is maintained in a linear shape. From this state, when the operator tries to assemble the second cover 70 to the first cover 60, the opening edge 72b of the second cover 70 contacts the side surface of each wiring 30, and each wiring 30 is gradually bent along the shapes of the wiring support base 55 and the guide plate 56. And finally, as shown in FIG. 4, the wiring 30 from the intermediate portion 30c toward the second terminal 30b is wired using the first space region S1 and the second space region S2 as the wiring path. That is, the wiring 30 changes the extending direction according to the wiring path so that it extends along the X direction at the upper end portion 55a, extends along the Z direction in the first space region S1, and then extends along the X direction again in the second space region S2. Therefore, the structural portion around the wiring support base 55 that defines the wiring path at the portion where the wiring 30 is drawn out from the inside of the main body 2 to the outside functions as a so-called strain relief structure. That is, for example, even if an external force due to the connector 40 being pulled is applied to the wiring 30, the structural portion suppresses the transmission of the external force to the upstream side of the wiring 30, that is, the first terminal 30a side connected to the terminal block 54.

[0038] Next, the effects of the ECU 1 will be described.

[0039] The ECU 1 includes a substrate 10 on which an electronic component 11 is mounted, and a plurality of terminals 20 whose first ends 20a are connected to the substrate 10. The ECU 1 includes a plurality of wirings 30 to which a first terminal 30a is connected to any one of the second ends 20b on the opposite side of the first ends 20a in the plurality of terminals 20, and a connector 40 to which a second terminal 30b on the opposite side of the first terminal 30a in the plurality of wirings 30 is connected. The ECU 1 includes a flat wiring base 50 having a plurality of terminal blocks 54 that are arranged in parallel with the substrate 10 and support a part of the second ends 20b on the side of the wiring surface 51a opposite to the back surface 51b facing the substrate 10. The ECU 1 includes a first cover 60 having a first flat plate portion 61 that covers the substrate 10 and a first frame portion 62 that is continuous with the edge of the first flat plate portion 61. Further, the ECU 1 includes a second cover 70 having a second flat plate portion 71 that covers the wiring base 50 and a second frame portion 72 that is continuous with the edge of the second flat plate portion 71, and the second cover 70 is combined with the first cover 60 by engaging a part of the second frame portion 72 with a part of the first frame portion 62. A part of the leading edge 72a of the second frame portion 72 is an opening edge 72b that is separated from the leading edge 62a of the first frame portion 62 in the combination direction of the first cover 60 and the second cover 70. The wiring base 50 has a wiring support base 55 that is provided on the side of the wiring surface 51a and has an outer surface 55b that faces a part of the inner surface 72c of the second frame portion 72 in at least the range where the opening edge 72b is provided. Further, the wiring base 50 has a guide plate 56 that is continuous in a direction perpendicular to the outer surface 55b of the wiring support base 55 and has a guide surface 56a that partially faces the opening edge 72b in the combination direction. Each wiring 30 is drawn out from the terminal block 54 to the outside of the second cover 70 through a first space region S1 sandwiched between the outer surface 55b of the wiring support base 55 and the inner surface 72c of the second frame portion 72, and a second space region S2 sandwiched between the opening edge 72b and the guide surface 56a.

[0040] Here, the combination direction of the first cover 60 and the second cover 70 corresponds to the direction along the Z direction in the above example. Also, the direction perpendicular to the outer surface 55b of the wiring support base 55 corresponds to at least either the X direction or the Y direction in the above example.

[0041] First, in the ECU1, the connector 40 is not installed on the substrate 10 and is only connected to the main body 2 via a plurality of wirings 30. Therefore, according to the ECU1, it is possible to avoid in advance problems such as the living space in the passenger compartment being compressed due to the external electric wire bulging around the main body 2.

[0042] Also, in the ECU1, as described above, in the portion where the plurality of wirings 30 are drawn out from the inside to the outside of the main body 2, the structural portion around the wiring support base 55 that defines the wiring route functions as a strain relief structure. Therefore, for example, even when the connector 40 is pulled when it is fitted to the external connector on the external circuit side, the structural portion can suppress the transmission of the external force to the first terminal 30a side connected to the terminal block 54. Therefore, according to the ECU1, it is possible to avoid in advance an excessive load being applied to the plurality of wirings 30 routed inside the main body 2 or to the first terminals 30a connected to the terminal block 54 for each of the wirings 30.

[0043] As described above, according to the present embodiment, it is possible to provide the ECU1 that suppresses an excessive load being applied to the wiring 30 inside the main body 2 while separating the connector 40 from the main body 2 via the wiring 30.

[0044] Furthermore, in the above-described ECU1, an opening through which the plurality of wirings 30 can pass is formed between the opening edge 72b of the second frame portion 72 of the second cover 70 and the guide surface 56a of the guide plate 56. However, according to the ECU1, when looking at the opening from the outside along the X direction or the Y direction, on the front side, the outer surface 55b of the wiring support base 55 exists. Therefore, the structural portion around the wiring support base 55 that functions as a strain relief structure also has a function of suppressing the intrusion of moisture from the outside to the inside of the main body 2 through the opening.

[0045] Also, in the ECU 1, the first interval C1 between the outer surface 55b of the wiring support base 55 and the inner surface 72c of the second frame portion 72, and the second interval C2 between the opening edge 72b and the guide surface 56a may each be larger than the value of the outer diameter D of the wiring 30 and smaller than twice the value of the outer diameter D.

[0046] According to this ECU 1, since the extending shapes of the plurality of wirings 30 can be more reliably changed in the structural portion around the wiring support base 55, it is possible to more reliably suppress an excessive load from being applied to the wiring 30 inside the main body 2.

[0047] Furthermore, in the ECU 1, the wiring support base 55 may have an upper end portion 55a facing the second flat portion 71. The upper end portion 55a may have a plurality of holding portions 55d that sandwich and hold the sides of each wiring 30.

[0048] In this ECU 1, when assembling the first cover 60 to the second cover 70 at the final assembly stage, an intermediate portion 30c, which is a part of the plurality of wirings 30, is supported by the holding portion 55d of the upper end portion 55a. Therefore, according to this ECU 1, it is possible to reliably change the extending shape of a part of the wiring 30 on the second terminal 30b side rather than the intermediate portion 30c without causing slack or the like in a part of the wiring 30 on the first terminal 30a side rather than the intermediate portion 30c.

[0049] In the above description, the case of using one of the three wiring support bases 55 existing on the wiring harness base 50 has been exemplified. However, depending on the arrangement configuration of the plurality of terminal blocks 54 on the wiring harness base 50, either one of the other two wiring support bases 55 may be used as an alternative, or not only one wiring support base 55 but also a plurality of wiring support bases 55 may be used at one time.

[0050] As described above, one embodiment has been described, but the embodiments are not limited to these, and various modifications are possible within the scope of the gist of the embodiments.

Description of Reference Numerals

[0051] 1 Electronic Control Unit (ECU) 10 Substrate 11 Electronic component 20 Terminal 20a First end 20b Second end 30 Wiring 30a First terminal 30b Second terminal 40 Connector 50 Cable tray 51a Cable laying surface 51b Back surface 54 Terminal block 55 Wiring support base 55a Upper end 55b Outer surface 55d Holding part 56 Guide plate 56a Guide surface 60 First cover 61 First flat part 62 First frame part 62a Leading edge 70 Second cover 71 Second flat part 72 Second frame part 72a Leading edge 72b Opening edge 72c Inner surface C1 First interval C2 Second interval D Outer diameter of wiring S1 First space region S2 Second space region

Claims

1. a substrate on which electronic components are mounted; a plurality of terminals having first ends connected to the substrate; a plurality of wirings having first terminals connected to any of second ends of the plurality of terminals on the side opposite to the first ends; a connector having second terminals connected to the second ends of the plurality of wirings on the side opposite to the first terminals; a flat wiring base having a plurality of terminal blocks arranged in parallel with the substrate and supporting a part of the second ends by exposing them on the side of the wiring surface opposite to the back surface facing the substrate; a first cover having a first flat plate portion covering the substrate and a first frame portion continuous with an edge of the first flat plate portion; a second cover having a second flat plate portion covering the wiring base and a second frame portion continuous with an edge of the second flat plate portion, and being combined with the first cover by engaging a part of the second frame portion with a part of the first frame portion; a part of a leading edge of the second frame portion is an opening edge spaced apart from a leading edge of the first frame portion in a combining direction of the first cover and the second cover; the wiring base includes: a wiring support base provided on the side of the wiring surface and having an outer surface facing a part of an inner surface of the second frame portion in at least a range where the opening edge is provided; a guide plate continuous in a direction perpendicular to the outer surface of the wiring support base and having a guide surface with a part facing the opening edge in the combining direction; each of the wirings is drawn out from the terminal block to the outside of the second cover through a first space region sandwiched between the outer surface of the wiring support base and the inner surface of the second frame portion and a second space region sandwiched between the opening edge and the guide surface, an electronic control unit.

2. at least one of a first interval between the outer surface of the wiring support base and the inner surface of the second frame portion and a second interval between the opening edge and the guide surface is larger than a value of an outer diameter of the wiring and smaller than a value twice the outer diameter, the electronic control unit according to Claim 1.

3. the wiring support base has an upper end portion facing the second flat plate portion; the upper end portion has a plurality of holding portions sandwiching and holding sides of each wiring, the electronic control unit according to Claim 1 or 2.

Images