JP5846181B2 - Electronic control unit - Google Patents

Description

  The present invention relates to a wiring board in which a through hole is formed, a lead inserted into the through hole, an insertion mounting type first electronic component having a main body supported by the lead, and a plurality of parts mounted on the wiring board. In particular, the present invention relates to an electronic control device provided with the second electronic component.

  2. Description of the Related Art Conventionally, as shown in Patent Document 1, for example, an insertion mounting type electronic component (hereinafter, referred to as a first electronic component) including a component main body and a lead wire protruding from the component main body is used for inserting a lead wire. There is known an electronic control device that is mounted on a circuit board on which through holes are formed.

JP 2012-89666 A

  In the electronic control device described above, in addition to the first electronic component, a plurality of second electronic components that constitute a circuit together with the first electronic component, and a heat radiating portion for radiating heat generated in the second electronic component Is mounted on the circuit board.

  The first electronic component is composed of the lead and the component main body as described above, and the lead is inserted into the through hole of the circuit board. Therefore, when the electronic control device is attached to the vehicle, the circuit board vibrates due to external force such as vehicle vibration, and the component main body vibrates about the fixed portion between the lead and the circuit board due to the vibration of the circuit board. This may lead to fatigue of the leads, resulting in poor electrical connection between the first electronic component and the circuit board.

  Therefore, a configuration in which a support portion for supporting the component main body of the first electronic component is provided on the circuit board is also conceivable. However, in this configuration, since the support portion is provided on the circuit board, the area for mounting the second electronic component on the circuit board is reduced. As a result, the physique of the circuit board increases, and as a result, the physique of the electronic control device may increase.

  In view of the above problems, an object of the present invention is to provide an electronic control device in which an increase in physique is suppressed.

  The invention disclosed herein employs the following technical means to achieve the above object. Note that the claims and the reference numerals in parentheses described in this section indicate the correspondence with the specific means described in the embodiments described later as one aspect, and are within the technical scope of the invention. It is not intended to limit.

One of the disclosed inventions is an electronic control device attached to a vehicle, and includes a wiring board (10) in which a through hole (12) is formed, a lead (21) inserted in the through hole, and a lead. An insertion mounting type first electronic component (20) having a supported main body (22), a plurality of second electronic components (30) mounted on the wiring board, and a mounted member ( 40) and a wiring board, a first electronic component, a second electronic component, and an outer case (50) for housing a part of the mounted member, and the mounted member is fixed to the wiring substrate, (2) A heat dissipating part (41) for dissipating heat generated in the electronic parts, a support part (42) for integrally supporting the main body part, and a heat dissipating part for attaching the wiring board to the vehicle. An integrally molded vehicle fixing portion (45); And, the heat radiation portion and the support portion is accommodated in the outer case, the vehicle fixing portion is disposed outside the outer case, the supporting portion between the wiring board and the main body portion is arranged, a predetermined the support portion and the wiring substrate The space is separated, and a space for mounting at least one of the plurality of second electronic components on the wiring board is formed between the support portion and the wiring board.

  According to this, the area for mounting the second electronic component (30) on the wiring board (10) is smaller than the configuration in which the support part that supports the main body part of the first electronic component is directly fixed to the wiring board. The decrease is suppressed. As a result, an increase in the physique of the wiring board (10) is suppressed, and as a result, an increase in the physique of the electronic control device (100) is suppressed.

The mounted member (40) has a vehicle fixing portion (45) formed integrally with the heat radiating portion (41). Therefore, the heat generated by the second electronic component (30) can be released to the vehicle side via the wiring board (10), the heat radiating part (41), and the vehicle fixing part (45). That is, the heat of the second electronic component (30) can be efficiently radiated. Thereby, although the support part (42) is the structure integrally molded by the heat radiating part (41), the heat transmitted from the heat radiating part (41) to the support part (42) side is reduced, and as a result, the second electronic component It can also be suppressed that the heat of (30) affects the first electronic component (20). Furthermore, since the mounted member (40) integrally includes the heat dissipating part (41), the support part (42), and the vehicle fixing part (45), the number of parts can be reduced.

One of the other disclosed inventions is an electronic control device attached to a vehicle, which is a wiring board (10) in which a through hole (12) is formed, a lead (21) inserted in the through hole, and Insertion mount type first electronic component (20) having a main body portion (22) supported by leads, a plurality of second electronic components (30) mounted on the wiring board, and a mounted state mounted on the wiring board A member (40), and the mounted member is fixed to the wiring board, and dissipates heat generated by the second electronic component, and a body integrally formed with the heat dissipating unit A support portion (42) for supporting the wiring portion and a vehicle fixing portion (45) integrally formed with the heat radiating portion for attaching the wiring board to the vehicle. The support portion and the wiring board are separated from each other by a predetermined distance. Between the support portion and the wiring board. A space for mounting at least one of the components on the wiring board is formed, and among the plurality of second electronic components, a surface mounting structure is formed, and in particular, the second electronic component that generates heat is fixed to the heat dissipation portion of the wiring substrate. It is provided in the back surface part of the part. This invention can also produce the same effects as the above-described invention.

  Another disclosed invention is characterized in that the support portion and the main body portion are mechanically connected via an adhesive (71).

  According to this, each of the lead (21) and the main body (22) constituting the electronic component (20) is fixed to the wiring board (10). Therefore, even if the wiring board (10) vibrates due to external force such as vehicle vibration, the electronic component (20) vibrates together with the wiring board (10), so that the main body (22) of the electronic component (20) is connected to the lead (21 ) And the wiring board (10) are prevented from vibrating with a fixed portion as a fulcrum. For this reason, it is suppressed that an electrical connection failure occurs between the electronic component (20) and the wiring board (10) due to fatigue of the lead (21).

It is a perspective view showing a schematic structure of an electronic control unit concerning a 1st embodiment. It is sectional drawing which follows the II-II line | wire of FIG. It is a disassembled perspective view which shows the component of an electronic controller. It is a perspective view which shows the state by which the inner case was assembled | attached to the wiring board. FIG. 5 is a perspective view illustrating a state in which a connector and an electronic component are assembled to the wiring board and the inner case illustrated in FIG. 4. It is sectional drawing which follows the VI-VI line of FIG. It is sectional drawing which shows the modification of an electronic controller.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention mounted on a vehicle will be described with reference to the drawings.

(First embodiment)
The electronic control device according to the present embodiment will be described based on FIGS. In the following, the three directions orthogonal to each other will be referred to as the x direction, the y direction, and the z direction. A plane defined by the x direction and the y direction is an xy plane, a plane defined by the y direction and the z direction is a yz plane, and a plane defined by the z direction and the x direction is z−. Shown as x-plane.

  As shown in FIGS. 1 to 3, the electronic control device 100 is configured as, for example, an engine ECU, and includes a wiring board 10, a first electronic component 20, a second electronic component 30, and an inner case 40. Have. Each of the first electronic component 20, the second electronic component 30, and the inner case 40 is mounted on the wiring board 10. The wiring board 10 (electronic control device 100) is fixed to a vehicle (for example, an engine block) by screws (not shown) inserted into the inner case 40.

  The electronic control apparatus 100 according to the present embodiment includes an outer case 50 that accommodates a part of the wiring board 10, the first electronic component 20, the second electronic component 30, and the inner case 40 in addition to the above elements. Moreover, it has the connector 60 for electrically connecting the wiring board 10, the 1st electronic component 20, and the 2nd electronic component 30 with an external device.

The wiring substrate 10 includes a substrate 11 made of an insulating material and wirings (not shown) formed on the surface and inside of the substrate 11 respectively. In addition, a through hole 12 is formed in the wiring board 10, and a lead 21 of a first electronic component 20 described later is inserted into the through hole 12.

  The first electronic component 20 is an insertion mounting type electronic component, and includes a lead 21 and a main body 22 supported by the lead 21. In the present embodiment, an aluminum electrolytic capacitor is employed as the first electronic component 20. As shown in FIG. 5, four aluminum electrolytic capacitors (first electronic component 20) are mounted on the wiring board 10. The main body 22 has a cylindrical shape as a whole, and the leads 21 protrude from the circular bottom surface. The lead 21 is bent in an L shape so that the side surface of the main body 22 is supported by a support portion 42 of the inner case 40 described later.

  The second electronic component 30 is a surface-mount type electronic component, and constitutes a circuit together with the wiring of the wiring substrate 10 and the first electronic component 20 by being mounted on the wiring substrate 10. A plurality of second electronic components 30 are mounted on the wiring board 10. The second electronic component 30 includes passive elements such as capacitors and resistors, and active elements such as MOSFETs and diodes. These active elements generally generate a higher amount of heat than passive elements. In addition, a microcomputer, an IC chip, or the like can be used as the second electronic component 30.

  The inner case 40 corresponds to a mounted member described in the claims, and is disposed in a storage space constituted by an outer case 50 described later. The inner case 40 includes a heat radiating portion 41 that radiates heat generated in the second electronic component 30 and a support portion 42 that is integrally formed with the heat radiating portion 41 and supports the main body portion 22 of the first electronic component 20. Have. As shown in FIGS. 3 and 4, the heat radiating portion 41 is formed with irregularities and notches according to the shape and arrangement of the second electronic component 30, and the support portion 42 according to the shape of the first electronic component 20. A dent is formed. As shown in FIG. 2, the heat radiating portion 41 is thermally connected to the wiring board 10 via a heat conducting member 70, and the first electronic component 20 is mechanically connected to the support portion 42 via an adhesive 71. ing.

  In the present embodiment, the facing surface 22a of the main body portion 22 facing the support portion 42 and the facing surface 42a of the support portion 42 facing the main body portion 22 have a similar shape. Thereby, the thickness of the adhesive 71 provided between both is made uniform. Further, the opposing surface 22 a of the main body 22 is convex toward the support portion 42, and the opposing surface 42 a of the supporting portion 42 is a concave corresponding to the convexity of the main body 22. The support portion 42 is formed with a damming portion 43 that suppresses leakage of the liquid state adhesive 71 (adhesive 71 before curing). The damming portion 43 has an annular shape as shown in FIG. 3, and surrounds the periphery of the main body portion 22 as shown in FIG. Note that both the heat conducting member 70 and the adhesive 71 have properties that are higher in heat conductivity than air. As the heat conductive member 70, for example, a heat conductive sheet, a heat conductive gel, a heat conductive grease, a heat conductive adhesive, or the like can be employed.

  As shown in FIG. 6, the support portion 42 and the wiring substrate 10 are separated from each other by a predetermined distance in the Z direction, and at least one of the second electronic components 30 is placed between the support portion 42 and the wiring substrate 10. A space for mounting on 10 is configured. As a result, the plurality of second electronic components 30 are mounted on the area of the wiring board 10 facing the support portion 42.

  The inner case 40 includes a vehicle fixing portion 45 in which a vehicle fixing hole 46 for screwing the wiring board 10 and the like to the vehicle is formed in addition to the heat radiating portion 41 and the support portion 42 described above. In this embodiment, the vehicle fixing | fixed part 45 is integrally molded in each of the four corners of the thermal radiation part 41 which makes a planar substantially rectangular shape.

  Note that, among the second electronic components 30 described above, particularly active elements such as MOSFETs and diodes that generate heat are provided on the back surface portion of the portion of the wiring board 10 to which the heat radiation portion 41 is fixed. Specifically, the heat radiating portion 41 is fixed to one surface of the wiring board 10, and the second electronic component 30 (active element) that generates heat is disposed on the back surface portion of the portion opposite to the one surface where the heat radiating portion is fixed. ing.

  The outer case 50 has an upper case 51 and a lower case 52. As shown in FIGS. 2 and 3, the upper case 51 has irregularities according to the shapes of the inner case 40, the first electronic component 20, and the second electronic component 30, and the lower case 52 is Depending on the shape and arrangement of the second electronic component 30, the center is recessed. Further, as shown in FIG. 2, the upper case 51, the lower case 52, and the inner case 40 are mechanically connected to each other, and a storage space constituted by the outer case 50 (51, 52). Projections and dents are formed to maintain airtightness.

  A recessed portion 41 a that is recessed in a direction away from the upper case 51 is formed on the contact surface of the heat radiating portion 41 with the upper case 51. A portion 41b is formed. Accordingly, the upper case 51 is formed with a protrusion 51a to be inserted into the recess 41a, and the lower case 52 is formed with a recess 52a into which the protrusion 41b is inserted.

  Further, as shown in FIG. 3, the upper case 51, the lower case 52, and the inner case 40 are formed with fixing holes 51b, 52b, and 41c for permanently fixing the three members. The three members are permanently fixed by inserting screws and bolts into these fixing holes 51b, 52b, and 41c. As shown in FIG. 1, the vehicle fixing portion 45 and the connector 60 described later are exposed to the outside from a storage space formed by the outer case 50. The vehicle fixing portion 45 extends from the heat radiating portion 41 and is disposed outside the outer case 50.

  The connector 60 connects the circuit configured on the wiring board 10 and an external device. The connector 60 includes a connector pin 61 and a surrounding portion 62 that surrounds the connector pin 61. One end of the connector pin 61 is electrically connected to the wiring board 10, and the other end can be connected to an external device.

  Next, an assembly process of the electronic control device 100 according to this embodiment will be described. First, as shown in FIG. 3, the wiring board 10 on which the second electronic component 30 is mounted is prepared. In other words, the second electronic component 30 is reflow soldered. Thereafter, as shown in FIG. 4, the inner case 40 is assembled to the wiring board 10 via the heat conducting member 70. Next, as shown in FIG. 5, the connector 60 is assembled to the wiring board 10, and the first electronic component 20 is mounted on the wiring board 10 and the inner case 40. At this time, the lead 21 of the first electronic component 20 and the connector pin 61 of the connector 60 are inserted into the through hole 12 of the wiring board 10. And the main-body part 22 is mounted in the support part 42 via the adhesive agent 71, and the connector pin 61 and each lead 21 are connected by solder (for example, local flow soldering). Finally, the upper case 51 and the lower case 52 are assembled, and the wiring board 10 and a part of the inner case 40 are accommodated in the outer case 50. Thus, the electronic control device 100 shown in FIG. 1 is formed.

  Next, functions and effects of the electronic control apparatus 100 according to the present embodiment will be described. As described above, the support portion 42 and the wiring substrate 10 are separated from each other by a predetermined distance, and at least one of the second electronic components 30 is mounted on the wiring substrate 10 between the support portion 42 and the wiring substrate 10. A space is constructed. According to this, the area for mounting the second electronic component 30 on the wiring board 10 may be reduced as compared with the configuration in which the support portion that supports the main body portion of the first electronic component is directly fixed to the wiring board. It is suppressed. As a result, an increase in the physique of the wiring board 10 is suppressed, and as a result, an increase in the physique of the electronic control device 100 is suppressed.

  The inner case 40 has a vehicle fixing portion 45 that is integrally formed with the heat radiating portion 41. Therefore, the heat generated by the second electronic component 30 can be released to the vehicle side via the wiring board 10, the heat radiating portion 41, and the vehicle fixing portion 45. That is, the heat of the second electronic component 30 can be efficiently radiated. Thereby, although the support part 42 is the structure integrally molded by the heat radiating part 41, the heat | fever transmitted from the heat radiating part 41 to the support part 42 side is reduced, and the heat | fever of the 2nd electronic component 30 is eventually 1st electronic component 20 can be suppressed.

  Since the inner case 40 has the heat radiation part 41, the support part 42, and the vehicle fixing part 45 integrally, the number of parts can be reduced.

  The support part 42 and the main body part 22 are mechanically connected via an adhesive 71. According to this, each of the lead 21 and the main body 22 constituting the first electronic component 20 is fixed to the wiring board 10. Therefore, even if the wiring board 10 vibrates due to an external force such as vibration of an engine mounted on the vehicle, the first electronic component 20 vibrates together with the wiring board 10, so that the main body portion 22 of the first electronic component 20 is connected to the lead 21. And vibration with the fixed part of the wiring board 10 as a fulcrum are suppressed. For this reason, the electrical connection failure between the first electronic component 20 and the wiring board 10 due to fatigue of the leads 21 is suppressed.

  The opposing surface 22a of the main body portion 22 facing the support portion 42 and the opposing surface 42a of the support portion 42 facing the main body portion 22 have a similar shape, and the thickness of the adhesive 71 provided therebetween is uniform. Yes. According to this, since the shapes of the opposing surfaces of the main body part and the support part are different, compared to the configuration in which the thickness of the adhesive provided between them is non-uniform, the specific part of the adhesive 71 The occurrence of stress concentration is suppressed. Further, the filling amount of the adhesive 71 can be reduced.

  The opposing surface 22 a of the main body portion 22 is convex toward the support portion 42, and the opposing surface 42 a of the support portion 42 is concave corresponding to the convexity of the main body portion 22. According to this, unlike the configuration in which each of the facing surfaces 22a and 42a has a flat plate shape, the mechanical connection strength between the main body portion 22 and the support portion 42 is improved due to the anchor effect.

  The support portion 42 is formed with a damming portion 43 that suppresses leakage of the adhesive 71 in a liquid state before curing. According to this, as a result of the adhesive 71 leaking to an unintended part, the unintended part is prevented from being mechanically connected.

  Of the second electronic component 30, an active element such as a MOSFET or a diode that generates heat is provided on the back surface portion of the wiring board 10 where the heat radiation portion 41 is fixed. According to this, the heat generated in the second electronic component 30 is generated in comparison with the configuration in which the electronic element that generates heat particularly is provided in a part different from the back part of the part where the heat radiation part 41 is fixed in the wiring board. Heat can be efficiently transferred to the heat radiating portion 41. For this reason, the heat generated in the second electronic component 30 can be efficiently radiated.

  A vehicle fixing portion 45 is integrally formed with the heat radiating portion 41. According to this, an increase in the number of parts is suppressed as compared with a configuration in which the screw hole portion is provided separately from the inner case and provided in the electronic control device. In addition, the heat of the second electronic component 30 such as a MOSFET or a diode that generates heat can be efficiently radiated to the vehicle.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the present embodiment, an example in which the main body portion 22 is an aluminum electrolytic capacitor is shown. However, the main body 22 is not limited to the above example, and for example, a coil or the like can be employed.

  In the present embodiment, an example in which the overall shape of the main body portion 22 is a columnar shape is shown. However, the overall shape of the main body 22 is not limited to the above example, and may be a prism, for example.

  In this embodiment, the support part 42 and the 1st electronic component 20 showed the example connected mechanically through the adhesive agent 71. As shown in FIG. However, the adhesive 71 may be omitted.

  In the embodiment, an example is shown in which the opposing surface 22a of the main body portion 22 facing the support portion 42 and the opposing surface 42a of the support portion 42 facing the main body portion 22 have similar shapes. However, the opposing surfaces 22a and 42a may have different shapes that are not similar to each other.

  In this embodiment, the facing surface 22a of the main body portion 22 is convex toward the support portion 42, and the facing surface 42a of the support portion 42 is concave corresponding to the convexity of the main body portion 22. However, on the contrary, a configuration is adopted in which the opposing surface 42a of the support portion 42 is convex toward the main body portion 22 and the opposing surface 22a of the main body portion 22 is concave corresponding to the convexity of the support portion 42. You can also. That is, it is possible to employ a structure in which one of the facing surface 22a of the main body portion 22 and the facing surface 42a of the support portion 42 has a convex on the other side and the other has a concave corresponding to the convex.

  In this embodiment, the example in which the vehicle fixing | fixed part 45 is provided in each of the four corners of the thermal radiation part 41 was shown. However, the number and positions of the vehicle fixing portions 45 are not limited to the above example. The number and position of the vehicle fixing portions 45 can be appropriately changed in consideration of the shape of the electronic control device 100 and the mounting counterpart and the connection reliability with the mounting counterpart in the electronic control device 100.

  In the second electronic component 30, an active element such as a MOSFET or a diode that generates heat is provided on the back surface portion of the wiring board 10 where the heat radiation portion 41 is fixed. However, the mounting position of the active element and the heat radiating portion 41 is not limited to the above example. In addition, a configuration in which a passive element that particularly generates heat when energized is provided on the back surface portion of the portion of the wiring board 10 to which the heat radiation portion 41 is fixed may be employed.

  In the present embodiment, as shown in FIG. 6, an example in which only the second electronic component 30 is provided between the support portion 42 and the wiring board 10 has been shown. However, as shown in FIG. 7, a heat conduction member 70 is provided between the support portion 42 and the wiring board 10 in addition to the second electronic component 30, and the support portion 42 and the wiring board 10 are interposed via the heat conduction member 70. It is also possible to adopt a configuration in which and are thermally connected. According to this, the heat generated in the first electronic component 20 can be transferred to the wiring substrate 10 via the support portion 42 and the heat conducting member 70. Thereby, the heat generated in the first electronic component 20 can be radiated to the vehicle via the heat conducting member 70, the wiring substrate 10, the outer case 50, and the vehicle fixing portion 45.

  In the present embodiment, examples of the electronic component mounted on the wiring board 10 include the first electronic component 20 of the insertion mounting type supported by the support portion 42 of the inner case 40 and the second electronic component 30 of the surface mounting type. showed that. In other words, an example in which only the first electronic component 20 supported by the support portion 42 is provided as the insertion mounting type electronic component is shown. However, it may be configured to further include an insertion mounting type third electronic component that is not supported by the support portion 42. For example, the third electronic component is disposed on the same surface side as the first electronic component 20 with respect to the wiring substrate 10 and is locally flow soldered together with the first electronic component 20 and the like.

  Moreover, although only the surface-mount type electronic component is shown as the second electronic component 30, an insertion-mount type electronic component can be adopted. For example, as the second electronic component 30 disposed in the space between the support portion 42 and the wiring board 10, an insertion mounting type electronic component can be adopted. In this case, the insertion mounting type second electronic component 30 may be locally flow soldered to the wiring board 10 before the inner case 40 is fixed to the wiring board 10. However, as the second electronic component 30 provided on the back surface portion of the portion of the wiring board 10 to which the heat radiation portion 41 is fixed, a surface-mount type electronic component is employed.

DESCRIPTION OF SYMBOLS 10 ... Wiring board 12 ... Through-hole 20 ... Electronic component 21 ... Lead 22 ... Main-body part 30 ... Electronic element 40 ... Inner case (mounted member)
41 ... Radiating part 42 ... Supporting part 50 ... Outer case,
100 ... Electronic control device

Claims (8)

An electronic control device attached to a vehicle,
A wiring board (10) in which a through hole (12) is formed;
A lead (21) inserted into the through hole, and a first electronic component (20) of an insertion mounting type having a main body (22) supported by the lead;
A plurality of second electronic components (30) mounted on the wiring board;
A mounted member (40) mounted on the wiring board;
An outer case (50) for housing the wiring board, the first electronic component, the second electronic component, and a part of the mounted member ;
The mounted member includes a heat dissipating part (41) fixed to the wiring board for dissipating heat generated in the second electronic component, and a support for supporting the main body part integrally formed with the heat dissipating part. Part (42), and a vehicle fixing part (45) formed integrally with the heat dissipating part for attaching the wiring board to the vehicle,
The heat radiating portion and the support portion are accommodated in the outer case, and the vehicle fixing portion is disposed outside the outer case,
The support part is disposed between the wiring board and the main body part, the support part and the wiring board are spaced apart from each other by a predetermined distance, and a plurality of the first parts are provided between the support part and the wiring board. An electronic control device comprising a space for mounting at least one of two electronic components on the wiring board. Among the plurality of second electronic components, the second electronic component having a surface mounting structure, particularly generating heat, is provided on a back surface portion of a portion of the wiring board to which the heat radiating portion is fixed. The electronic control device according to claim 1 . An electronic control device attached to a vehicle,
A wiring board (10) in which a through hole (12) is formed;
A lead (21) inserted into the through hole, and a first electronic component (20) of an insertion mounting type having a main body (22) supported by the lead;
A plurality of second electronic components (30) mounted on the wiring board;
A mounted member (40) mounted on the wiring board;
The mounted member includes a heat dissipating part (41) fixed to the wiring board for dissipating heat generated in the second electronic component, and a support for supporting the main body part integrally formed with the heat dissipating part. Part (42), and a vehicle fixing part (45) formed integrally with the heat dissipating part for attaching the wiring board to the vehicle,
The support portion and the wiring board are separated from each other by a predetermined distance, and a space for mounting at least one of the plurality of second electronic components on the wiring board is provided between the support portion and the wiring board. Configured ,
Among the plurality of second electronic components, the second electronic component having a surface mounting structure, particularly generating heat, is provided on a back surface portion of a portion of the wiring board to which the heat radiating portion is fixed. Electronic control device. The electronic control device according to claim 1, wherein the support portion and the main body portion are mechanically connected via an adhesive (71). The opposed surface (22a) of the main body portion to the support portion and the opposed surface (42a) of the support portion to the main body portion have a similar shape, and are provided between the main body portion and the support portion. The electronic control device according to claim 4 , wherein the adhesive (71) has a uniform thickness. Of the facing surface of the main body portion facing the support portion and the facing surface of the support portion facing the main body portion, one is convex toward the other, and the other is a concave corresponding to the convexity. The electronic control device according to claim 5 . The electronic control device according to any one of claims 4 to 6 , wherein a damming portion (43) for suppressing leakage of the adhesive in a liquid state is formed on the support portion. The said heat radiating part is thermally connected with the said wiring board via the heat conductive member (70) whose heat conductivity is higher than air, The any one of Claims 1-7 characterized by the above-mentioned. Electronic control device.

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