Electronic control unit

Abstract

An electronic control unit includes: a substrate on which an electronic component is mounted; a plurality of terminals having first ends connected to the substrate; a plurality of electric wires having a first end portion connected to one of second ends of the plurality of terminals, the second ends being located on an opposite side of the first end; and a wiring board having a plate-shaped base portion, the wiring board being arranged in parallel with the substrate. The wiring board arranges a plurality of electric wires introduced from the outside on a wiring surface of the base portion opposite to a rear surface facing the substrate. The second end of at least one of the terminals is located between the base and the plate. The base portion has an opening portion partially facing a terminal of which a second end is located between the base portion and the substrate and into which an electric wire is introduced.

Description

Technical Field

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

[0002] Traditionally, vehicles such as automobiles are equipped with electronic control units (ECUs) for controlling various functions. Typically, these ECUs include a substrate on which electronic components are mounted. As an example of such a substrate, JP 2002-58129A discloses a technology related to an electrical connection box comprising a wiring board having a plurality of reinforcing protrusions for supporting male terminals for fuse connections. Summary of the Invention

[0003] On a wiring board substrate, such as the one disclosed in JP 2002-58129A, a configuration in which wires are connected to terminals bonded to the substrate at one end is also conceivable. When multiple wires are routed on the substrate, a wiring board arranged parallel to the substrate is provided, and the wires are routed on the wiring board, with the ends of the wires pre-connected to a portion of the terminals exposed on the wiring board. However, if, for example, the multiple terminals exposed on the wiring board are randomly arranged, and a large number of wires are jumbled together on the wiring board, there is room for improvement to increase the degree of freedom in wiring.

[0004] An object of the present invention is to provide an electronic control unit in which the degree of freedom of internal wiring is increased.

[0005] According to an aspect of the present invention, an electronic control unit includes: a substrate on which electronic components are mounted; a plurality of terminals having a first end connected to the substrate; a plurality of wires having a first end connected to one of the second ends of the plurality of terminals, the second end being located on the opposite side of the first end; and a wiring board having a plate-shaped base, the wiring board being arranged parallel to the substrate; wherein the wiring board arranges the plurality of wires introduced from the outside on a wiring surface of the base opposite to the rear surface facing the substrate; the second end of at least one of the terminals is located between the base and the substrate; and the base has an opening portion, the opening portion partially facing the terminal whose second end is located between the base and the substrate, and the opening portion introduces the wires.

[0006] According to the above configuration, it is possible to provide an electronic control unit which increases the degree of freedom of its internal wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a perspective view of an electronic control unit according to one embodiment.

[0008] Figure 2It is a perspective view of a circuit unit included in the electronic control unit.

[0009] Figure 3 corresponds to Figure 2 An enlarged perspective view of the wire connection portion of part III.

[0010] Figure 4 is a plan view of a circuit unit including an example of wiring on a wiring board.

[0011] Figure 5 is with Figure 4 Part V in FIG. 1 is an enlarged plan view of the wire connection portion corresponding to FIG.

[0012] Figure 6 is with Figure 5 A side view of the wire connection portion corresponding to the VI-VI section.

[0013] Figure 7 is with Figure 5 The cross-sectional view of the wire connection portion corresponds to the VII-VII section in FIG.

[0014] Figure 8 corresponds to Figure 5 Side view of the wire connection portion of the VIII-VIII section.

[0015] Figure 9 is with Figure 5 Section IX-IX in FIG. 1 corresponds to a cross-sectional view of the wire connection portion. DETAILED DESCRIPTION

[0016] Hereinafter, an electronic control unit according to an embodiment will be described in detail with reference to the accompanying drawings. Hereinafter, the term "electronic control unit" will be abbreviated as "ECU". For ease of explanation, the dimensional ratios in the drawings are exaggerated and may differ from the actual ratios.

[0017] Figure 1 is a perspective view of the ECU 1 according to one embodiment. Figure 2 is a perspective view of the circuit unit 3 included in the ECU 1 .

[0018] The ECU 1 is installed in a vehicle such as an automobile and controls various functions. The ECU 1 includes a substrate 10 , a plurality of terminals 20 , a plurality of wires 30 , a connector 40 , a wiring board 50 , a first cover 60 , and a second cover 70 .

[0019] Here, in this embodiment, the unit consisting of the substrate 10, the plurality of terminals 20, a portion of the plurality of wires 30, the wiring board 50, the first cover 60, and the second cover 70 is identified as "main body 2." The unit including the substrate 10, the plurality of terminals 20, the plurality of wires 30, the connector 40, and the wiring board 50 is identified as "circuit unit 3."

[0020] The substrate 10 is, for example, a printed circuit board (PCB) on which a plurality of electronic components 11 (for example, see Figure 6 ). 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 considered to be a substantially rectangular flat plate that is parallel to a virtual XY plane defined by the X and Y directions that are orthogonal to each other and has both end sides in the X direction and both end sides in the Y direction.

[0021] Each of the plurality of terminals 20 electrically connects one of the wires 30 to a predetermined circuit on the substrate 10. The terminal 20 is a flat rod-shaped metal member. Each terminal 20 has a first end 20a as one end and a second end 20b as the other end opposite to the first end 20a (see, for example, FIG. Figure 6 ). The first end 20a is connected to a predetermined circuit on the substrate 10. In this embodiment, since the substrate 10 is regarded as a flat plate parallel to the XY plane, the terminals 20 are respectively arranged on the mounting surface 10a (for example, see Figure 6 ) to protrude in the Z direction orthogonal to the X direction and the Y direction. The second end 20b is connected to the first end portion 31 of one of the wires 30 (see Figure 4 ). The second end 20b includes, for example, two protruding pieces parallel to each other, and the core wire of the electric wire 30 is sandwiched between the two protruding pieces, so that the first end portion 31 can be easily connected.

[0022] In this embodiment, the terminals 20 are roughly divided into two types based on the height of the second end 20b when assembled in the circuit unit 3. Specifically, in at least one terminal 20 (hereinafter referred to as the "first terminal"), when assembled in the circuit unit 3, the second end 20b is located between the base 51 of the wiring board 50 and the substrate 10. On the other hand, in some terminals 20 (hereinafter referred to as the "second terminal"), when assembled in the circuit unit 3, at least a portion of the second end 20b is exposed on the wiring surface 51a of the base 51. Note that the terminals 20 shown in the drawings correspond to the first terminals. For convenience, the second terminals are not shown.

[0023] Each of the electric wires 30 electrically connects the connector 40 to one of the terminals 20. The electric wires 30 are wires in which a core wire serving as a conductor is covered with an insulator. Each electric wire 30 has a first end 31 as one end and a second end 32 as the other end opposite the first end 31. As described above, the first end 31 is connected to one of the second ends 20b of the terminal 20. The second end 32 is connected to the connector 40. Of both the first end 31 and the second end 32, the portion that actually contacts the second end 20b or the connector 40 is the core wire portion partially exposed by removing the insulator.

[0024] The connector 40 is connected to an external connector (not shown) provided on the object to which the ECU 1 is attached. In this embodiment, the ECU 1 includes, for example, three connectors 40: a first connector 40a, a second connector 40b, and a third connector 40c. The second end 32 of each wire 30 is connected to one of the first, second, and third connectors 40a, 40b, 40c. The connector 40 is not directly provided on the substrate 10, but is connected to the main body 2 of the ECU 1 only via the wires 30.

[0025] The wiring board 50 routes each of the wires 30 while connecting the first end portion 31 to the terminal 20 corresponding to each of the wires 30 in the main body 2. The wiring board 50 is made of, for example, a synthetic resin and is a flat member arranged in parallel with the substrate 10. Since the wiring board 50 maintains a stacked position relative to the substrate 10, it can also be called a "wiring layer." The wiring board 50 has a base 51, side walls 52, a base 53, at least one first terminal block 54 (see, for example, FIG. 1 ), and a plurality of terminal blocks 54 (see, for example, FIG. 1 ). Figure 6 ), multiple second terminal blocks 55 and wire entrances 56.

[0026] The base 51 is a plate facing the substrate 10 in the Z direction. The planar shape of the base 51 is the same as the planar shape of the substrate 10. One surface of the base 51 is a wiring surface 51a on which a portion of each wire 30 is laid. The other surface of the base 51 is located on the side opposite to the wiring surface 51a and is a rear surface 51b facing the substrate 10 (see, for example, FIG. 1 ). Figure 6 ).

[0027] The side wall 52 is continuous with the edge of the base 51 and protrudes in the Z direction in the direction opposite to the side facing the substrate 10 to surround the wiring space on the wiring surface 51a. However, in this embodiment, the side wall 52 is not in the form of a frame surrounding all four sides, but is continuous with at least one wire inlet 56.

[0028] The pedestal 53 is continuous with the edge of the base 51 and protrudes in the Z direction to at least partially contact the outer edge of the mounting surface 10a of the substrate 10. Thus, the distance between the base 51 and the substrate 10 is kept constant.

[0029] The first terminal block 54 and the second terminal block 55 support the terminal 20 with the second end 20b of the terminal 20 exposed. The arrangement of the terminal 20 depends on the circuit configuration of the mounting surface 10a of the substrate 10. Therefore, the arrangement of the first terminal block 54 and the second terminal block 55 is also determined based on the circuit configuration of the substrate 10.

[0030] Figure 3 corresponds to Figure 2FIG. 4 is an enlarged perspective view of the wire connection portion 4 of FIG. Here, the wire connection portion 4 refers to a component to which the wire 30 is connected to the second end 20 b of the terminal 20 in the first terminal block 54 or the second terminal block 55 .

[0031] The first terminal block 54 supports the second ends 20b of the first terminals among the plurality of terminals 20. In this embodiment, as an example, it is assumed that there are three terminals 20 as first terminals, and furthermore, three first terminal blocks 54 are provided to respectively support these terminals 20. The first terminal block 54 has an open slot 81 in which a portion of the second end 20b is exposed. For each electric wire 30, a portion of the first end 31 is inserted into the predetermined open slot 81, so that the core wire of the first end 31 is connected to the second end 20b. Figure 3 A portion of the opening groove 81 and the opening portion 81a in the opening groove 81 that is exposed from the wiring surface 51a are shown. Hereinafter, the three wire connection portions 4, each including a first terminal block 54, will be referred to as the first wire connection portion 4a, the second wire connection portion 4b, and the third wire connection portion 4c. The first wire connection portion 4a, the second wire connection portion 4b, and the third wire connection portion 4c are arranged in a direction opposite to the X direction. The specific configuration of the wire connection portion 4 including the first terminal block 54 will be described in detail below.

[0032] The second terminal block 55 supports the second end of the second terminal (not shown) in the terminal 20. As will be described later, the first terminal block 54 is provided on the rear surface 51b of the base 51, and the second terminal block 55 is provided on the wiring surface 51a of the base 51. The basic shape of the second terminal block 55 itself is the same as the basic shape of the first terminal block 54. Specifically, the second terminal block 55 supporting the second end of one of the terminals 20 has a shape in which the first terminal block 54 is flipped in the Z direction relative to the base 51. The second terminal block 55 can have a shape in which a plurality of second terminal blocks 55 supporting the second end of one terminal 20 are integrated side by side and continuously.

[0033] In this embodiment, there are three first terminals, and the terminals other than the first terminals in the plurality of terminals 20 are second terminals. However, in the plurality of terminals 20, the number of first terminals may be greater than the number of second terminals. In addition, all of the plurality of terminals 20 may be first terminals. That is, the presence of second terminals is not essential. Therefore, when all of the plurality of terminals 20 are first terminals, all of the plurality of terminal blocks present in the wiring board 50 are first terminal blocks 54.

[0034] The wire inlet 56 supports a portion of the wire 30 while introducing the wire 30 from the outside of the wiring board 50 to the wiring surface 51a of the base 51. At least one wire inlet 56 is provided as a protrusion at the outer edge of the wiring board 50 and on the wiring surface 51a. In this embodiment, as an example, there are three wire inlets 56: a first wire inlet 56a extending in the Y direction, and a second wire inlet 56b and a third wire inlet 56c each extending in the X direction. When routing the wires 30, it is not necessary to use all of the wire inlets 56. As an example, Figure 1 A configuration is shown in which all the electric wires 30 are pulled from the connector 40 into the main body 2 through only the first electric wire entrance 56 a .

[0035] 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 wiring board 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.

[0036] 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 (see FIG. Figure 6 ) and a first frame portion 62 that is continuous with the edge of the first flat plate portion 61. For example, the first frame portion 62 protrudes in the Z direction to surround the substrate 10, and the first frame portion 62 is assembled relative to the second cover 70 in the Z direction. A portion of a first end edge 62a of the first frame portion 62 is close to the wire inlet 56 of the wiring board 50 in a non-contact manner.

[0037] The second cover 70 is a cover assembled from the side facing the wiring surface 51a of the wiring board 50. The second cover 70 has a second flat plate portion 71 (see FIG. 1 ) that covers the wiring board 50. Figure 6 ) and a second frame portion 72 that is continuous with an edge of the second flat plate portion 70. For example, the second frame portion 72 protrudes in a direction opposite to the Z direction, which is the direction of assembly relative to the first cover 60, to surround at least a portion of the wiring board 50. A portion of a second end edge 72a of the second frame portion 72 is adjacent to the wire inlet 56 of the wiring board 50 in a non-contact manner. A portion of the area between the first end edge 62a of the first frame portion 62 of the first cover 60 and the second end edge 72a of the second frame portion 72 of the second cover 70 is an opening area through which the plurality of wires 30 pass through the interior and exterior of the main body 2.

[0038] The first cover 60 has a plurality of first locking portions 63 in the first frame portion 62. On the other hand, the second cover 70 has a plurality of second locking portions 73 in the second frame portion 72. By engaging the second locking portions 73 with the first locking portions 63, the second cover 70 is combined with the first cover 60.

[0039] Next, a specific configuration of the electric wire connecting portion 4 including the first terminal block 54 will be described.

[0040] Figure 4 3 is a plan view of the circuit unit 3 including an example of wiring on the wiring board 50 . Figure 5 is with Figure 4 Part V in FIG. 1 corresponds to an enlarged plan view of the wire connecting portion 4 including the first terminal block 54 .

[0041] Here, although a large number of electric wires 30 can be actually wired in the wiring board 50 , for simplicity, only two electric wires 30 , ie, a first electric wire 30 a and a second electric wire 30 b will be exemplified below.

[0042] The first electric wire 30a is an example of an electric wire 30 that is drawn into the main body 2 through the second electric wire inlet 56b from a connector (not shown) similar to the connector 40. The first electric wire 30a is routed straightly from the second electric wire inlet 56b toward the first electric wire connection portion 4a on the wiring surface 51a, for example, through gaps in the plurality of second terminal blocks 55. The first end 31 of the first electric wire 30a is connected to the second end 20b of the terminal 20 located in the first electric wire connection portion 4a.

[0043] The second electric wire 30b is an example of an electric wire 30 that is drawn from the connector 40 into the main body 2 through the first electric wire inlet 56a. The second electric wire 30b is, for example, routed linearly from the first electric wire inlet 56a through gaps between the plurality of second terminal blocks 55 on the wiring surface 51a to the second end 20b of the terminal 20 supported by one of the second terminal blocks 55. Hereinafter, for convenience, the second terminal block 55 supporting the second end 20b will be referred to as the "connection terminal block 55a," to which the first end 31 of the second electric wire 30b is connected. The connection terminal block 55a is provided near the other side wall 52 that is opposite in the X direction from the side wall 52 in which the first electric wire inlet 56a is provided.

[0044] The second electric wire 30b is passed through the upper portion of the opening 81a corresponding to each of the first electric wire connection portion 4a, the second electric wire connection portion 4b, and the third electric wire connection portion 4c. The second electric wire 30b is passed above the first electric wire 30a connected to the first electric wire connection portion 4a. Here, "above" with respect to each component refers to the area corresponding to the upper side when the wiring surface 51a is a horizontal plane and the normal direction of the wiring surface 51a aligned with the Z direction is from bottom to top.

[0045] Figure 6 and Figure 7 4 is a view of the first electric wire connection portion 4a, the second electric wire connection portion 4b, and the third electric wire connection portion 4c viewed in the Y direction. Figure 6 is with Figure 5A side view of the wire connecting portion 4 corresponding to the VI-VI section in FIG. Figure 7 is with Figure 5 The cross-sectional view of the wire connecting portion 4 corresponds to the cross-sectional view VII-VII in FIG. Figure 7 The cross section in FIG. 5 is located in an XZ plane passing through a middle position in the thickness direction corresponding to the Y direction of the terminal 20 supported by the first terminal stage 54 .

[0046] Figure 8 and Figure 9 4a is a view of the first electric wire connection portion 4a viewed in the negative X direction. Figure 8 corresponds to Figure 5 A side view of the first electric wire connecting portion 4a in the cross section VIII-VIII in FIG. Figure 9 is with Figure 5 The cross section IX-IX in FIG. 1 corresponds to the cross section of the first electric wire connecting portion 4 a. Figure 9 The cross section in FIG. 5 is located in a YZ plane passing through a middle position in the width direction corresponding to the X direction of the terminal 20 supported by the first terminal stage 54 .

[0047] The three electric wire connection portions 4 each including the first terminal block 54 have the same configuration. Therefore, the first electric wire connection portion 4a will be described mainly with regard to the shape and the like.

[0048] First, as described above, the second end 20b of the terminal 20 as the first terminal is connected to the electric wire 30 by crimping the core wire of the electric wire 30 between the two protruding pieces. Hereinafter, the position where the second end 20b is crimped and connected to the first electric wire 30a is defined as "connection point 5". Figure 7 and Figure 9 The second end 20 b is located between the base 51 and the substrate 10 , so that the connection point 5 is located close to the substrate 10 relative to the base 51 .

[0049] In this embodiment, a first terminal block 54 is provided for each terminal 20, and therefore, three first terminal blocks 54 are provided for the first wire connection portion 4a, the second wire connection portion 4b, and the third wire connection portion 4c. As with the example of the second terminal block 55 described above, the first terminal block 54 can have a shape such that the three first terminal blocks 54 supporting the second end 20b of each terminal 20 are arranged side by side and continuously integrated.

[0050] The first terminal block 54 has a general schematic shape of a rectangular parallelepiped having one end continuous with the rear surface 51 b of the base 51 . The first terminal block 54 has a terminal through-hole 80 and an opening groove 81 .

[0051] The terminal through-hole 80 accommodates the second end 20b of each terminal 20. The terminal through-hole 80 extends in the Z direction, which is the direction in which the base 51 faces the substrate 10. One opening of the terminal through-hole 80 is located at the end of the first terminal block 54 facing the substrate 10. The other opening of the terminal through-hole 80 is located at the bottom surface 81b of the opening groove 81. However, a portion of the wall defining the terminal through-hole 80 can be a pair of grooves extending from the bottom surface 81b to the opening 81a in the Z direction and exposed from the wiring surface 51a. In other words, if the exposed end of the groove is also considered to be part of the opening 81a, then this portion of the opening 81a can be considered to face each terminal 20 in the Z direction. In this embodiment, the direction in which the second end 20b is crimped to the first electric wire 30a (hereinafter referred to as the "crimping direction") is in the X direction, so that the pair of grooves that expose a portion of the wall defining the terminal through-hole 80 from the wiring surface 51a also face each other in the X direction.

[0052] The opening groove 81 includes at least an opening portion 81a formed as part of the base portion 51 on the wiring surface 51a, and a bottom surface 81b separated from the opening portion 81a toward the substrate 10. The opening groove 81 communicates with the terminal through-hole 80, exposing a portion of the second end 20b of the terminal 20. To ensure that the first end 31 is introduced through the opening portion 81a and the second end 20b is crimped and connected to the introduced first end 31, the opening portion 81a has a first width W1 along the crimping direction that is larger than the outer diameter D of the first wire 30a. Meanwhile, the opening portion 81a has a second width W2, orthogonal to the first width W1, that is larger than the first width W1, to the extent that the distal end of the first end 31 is exposed above the wiring surface 51a, as in this embodiment.

[0053] The bottom surface 81b of the open groove 81 is generally parallel to the wiring surface 51a and is, for example, located at a distance L from the rear surface 51b of the base 51. The distance L can be set in advance so that when the first end 31 of the first electric wire 30a introduced into the open groove 81 contacts the bottom surface 81b, the connection point 5 is set at a desired position. It should be noted that the open groove 81 can be opened from the rear surface 51b of the base 51 to the bottom surface 81b so as to open into the space between the base 51 and the substrate 10.

[0054] Next, the effects of the ECU 1 will be described.

[0055] The ECU 1 includes a substrate 10 on which electronic components 11 are mounted, a plurality of terminals 20 having first ends 20a connected to the substrate 10, and a plurality of wires 30 having first end portions 31 connected to second ends 20b of the terminals 20, the second ends 20b being located opposite the first ends 20a. The ECU 1 also includes a wiring board 50 having a plate-shaped base 51 arranged parallel to the substrate 10. The wiring board 50 routes the plurality of wires 30 introduced from the outside onto a wiring surface 51a of the base 51, which is opposite to a rear surface 51b facing the substrate 10. The second end 20b of at least one terminal 20 is located between the base 51 and the substrate 10. The base 51 has an opening 81a that partially faces the terminal 20 and allows the wires 30 to be introduced. The second ends 20b of the terminals 20 are located between the base 51 and the substrate 10.

[0056] Here, for comparison, it is assumed that a virtual terminal block 154 equivalent to the second terminal block 55 is provided at the position of the first wire connecting portion 4a. Figure 6 and Figure 8 In other words, the dummy terminal block 154 supports the second terminal that is at least partially exposed on the wiring surface 51a of the base 51. The height of the end surface 154a of the dummy terminal block 154 in the Z direction can be set to be equal to the position of the end edge 52a of the side wall 52 of the wiring board 50.

[0057] According to the comparative example in which the dummy terminal block 154 is present, by connecting the first end portion 31 to the second end 20b supported by the dummy terminal block 154, the first electric wire 30a can be routed in a routing path equivalent to the above example in which the dummy terminal block 154 is not present. However, due to the dummy terminal block 154 present at the position of the first electric wire connecting portion 4a, the second electric wire 30b cannot pass through the upper portion of the opening portion 81a included in the first electric wire connecting portion 4a. Therefore, as Figure 4 As shown, a dummy wire 130b, which replaces the second wire 30b, is routed along a routing path that avoids not only the dummy terminal block 154 but also the plurality of second terminal blocks 55. In other words, it is assumed that the routing path of the dummy wire 130b is more complex than the routing path of the second wire 30b. Furthermore, it is assumed that the length of the dummy wire 130b is longer than the length of the second wire 30b.

[0058] In the ECU 1 according to the present embodiment, for some of the terminals 20, the second end 20b is formed to be located between the base 51 and the substrate 10, so that the position of the connection point 5 connected to the first end portion of the desired electric wire 30 is not set on the wiring surface 51a. Therefore, according to the ECU 1, when some of the electric wires 30 such as the second electric wire 30b should be wired on a simple straight path, for example, it is possible to prevent the second end 20b of the terminal 20 from being arranged at a position intersecting with the wiring path. In addition, although the wiring path is set on the wiring surface 51a, the fact that the second end 20b is prevented from being arranged at a position intersecting with the wiring path means that the second terminal base 55 does not need to be arranged on the wiring surface 51b. Therefore, as Figure 4 and Figure 5 As shown, the second electric wire 30b is less likely to interfere with the electric wire 30 connected to one of the terminals 20, such as the first electric wire 30a, or with the terminal block on the wiring surface 51a, such as the second terminal block 55, thereby increasing the degree of freedom in routing the electric wire 30. In particular, if the second end 20b is arranged between the base 51 and the substrate 10 in many terminals 20 instead of the example shown in the drawings, the degree of freedom in routing the electric wire 30 can be further increased.

[0059] As described above, according to the present embodiment, it is possible to provide the ECU 1 in which the degree of freedom of wiring is increased.

[0060] According to the ECU 1 , the wiring path of each electric wire 30 can be simplified by increasing the degree of freedom of wiring, the wiring of the plurality of electric wires 30 can be saved, and the main body 2 can be miniaturized or lightened by increasing the wiring space on the wiring board 50 .

[0061] Furthermore, in the ECU 1, the wiring board 50 may include a plurality of terminal blocks that support the second end 20b with a portion of the second end 20b exposed. The terminal blocks that support the second end 20b located between the base 51 and the substrate 10 may be provided on the rear surface 51b of the base 51.

[0062] In the above example, the terminal block supporting the second end 20 b between the base 51 and the substrate 10 is the first terminal block 54 of the plurality of terminal blocks. On the other hand, the terminal blocks other than the first terminal block 54 are the second terminal blocks 55 .

[0063] According to the ECU 1 , the terminal 20 having the second end 20 b located between the base 51 and the substrate 10 is also supported by the first terminal stage 54 , thereby preventing the connection stability between the terminal 20 and the electric wire 30 from being deteriorated.

[0064] Furthermore, the ECU 1 may include a connector 40 to which the second end portion 32 of each electric wire 30 , which is opposite to the first end portion 31 , is connected.

[0065] In this ECU 1, the connector 40 is connected to the main body 2 only through the plurality of wires 30, so that the position of the connector 40 can be freely changed relative to the main body 2. Therefore, according to the ECU 1, it is possible to avoid the occurrence of a malfunction such as a reduction in passenger compartment space due to expansion of external wires around the main body 2.

[0066] Although specific embodiments have been described, these embodiments have been disclosed by way of example only and are not intended to limit the scope of the invention. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions, and changes in the forms of the embodiments described herein may be made without departing from the spirit of the invention. The accompanying claims and their equivalents are intended to cover such forms or modifications as fall within the scope and spirit of the invention.

Claims

1. An electronic control unit, comprising: a substrate on which electronic components are mounted; a plurality of terminals, the plurality of terminals having a first end connected to the substrate; a plurality of electric wires having a first end connected to one of the second ends of the plurality of terminals, the second end being located on an opposite side of the first end; as well as a wiring board having a plate-shaped base, the wiring board being arranged in parallel with the substrate; in: The wiring board arranges the plurality of electric wires introduced from the outside on a wiring surface of the base portion opposite to the rear surface facing the substrate; The second end of at least one of the terminals is located between the base and the substrate; and The base has an opening portion, a portion of which faces the terminal whose second end is located between the base and the substrate, and the opening portion introduces the electric wire.

2. The electronic control unit according to claim 1, wherein: The wiring board includes a plurality of terminal blocks, and the plurality of terminal blocks support the second end in a state where a portion of the second end is exposed; and The terminal block supporting the second end between the base and the substrate is provided on the rear surface of the base. 3 . The electronic control unit according to claim 1 , further comprising a connector to which a second end portion of each of the electric wires, opposite to the first end portion, is connected.

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