JP2013030518A - Electronic control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic control unit in which adhesion of a cover to the case opening end can be minimized, by suppressing adhesion of flux to the case opening end.SOLUTION: A power module 16 and a control module 17 are disposed in this order from the bottom wall 13 side of a case 12 so as to be superimposed. The power module 16 and the control module 17 are connected electrically by a solder adhering to the surface of the control module 17 on the opposite side from the power module 16, and the case 12 and a cover are bonded and fixed by an adhesive applied to the opening end of the case 12. In such an electric control unit, the control module 17 is provided at a position closer to the cover side than the opening end of the case 12.

Description

  The present invention relates to an electronic control device in which a first circuit board and a second circuit board are superposed in a housing.

  As this type of electronic control device, for example, a device described in Patent Document 1 has been proposed. An electronic control device described in Patent Document 1 is a brake control device that controls a braking force of an automobile based on a driver's operation, and a seating surface on which a control board as a first circuit board is seated and a second circuit board The power board and the control board are fixed in a state where they are overlapped with a predetermined interval, and the opening of the case is closed. The cover is fixed to the case with an adhesive applied to the open end of the case.

  In addition, a plurality of through holes are formed through the control board, and terminals of other electrical components including the power board are inserted through the through holes, and the solder adhered to the cover side surface of the control board. The terminal and the control board are electrically connected.

JP 2010-132103 A

  By the way, when electrically connecting through holes formed on a circuit board such as the control board and terminals of other electrical components by soldering, generally, the terminals are inserted into the through holes and then soldered. The flux is applied to the circuit board so as to be easily attached, and soldering is performed thereon.

  However, in the electronic control device described in Patent Document 1, the terminal of the other electrical component is inserted into the through hole formed in the control board, and the control board is accommodated in the case while being accommodated in the case. Since the flux is applied, the flux adheres to the opening end of the case, and the adhesiveness between the case and the cover due to the adhesive may be reduced.

  The present invention has been made in view of the problems as described above, and suppresses a decrease in adhesiveness between the case and the cover by suppressing adhesion of flux to the opening end of the case. The object is to provide a device.

  In particular, the present invention is characterized in that the first circuit board is supported by the case at a position closer to the cover than the opening end of the case and is accommodated in the cover.

  Therefore, according to the present invention, since the first circuit board is provided at a position closer to the cover than the opening end of the case, the flux is applied to the cover side surface of the first circuit board. Moreover, adhesion of the flux to the opening end of the case is suppressed, and a decrease in adhesiveness between the case and the cover can be suppressed.

1 is an exploded perspective view showing an actuator unit to which an electronic control device according to the present invention is applied as an embodiment of the present invention. The exploded perspective view which looked at the actuator unit in Drawing 1 from another angle. The perspective view which decomposes | disassembles and shows the motor control apparatus in FIG. Sectional drawing in alignment with the AA of the motor control apparatus in FIG. The top view which shows the state which removed the cover from the motor control apparatus in FIG. The perspective view which shows the case of the motor control apparatus in FIG. Sectional drawing which expands and shows the seal groove in FIG. It is the perspective view which shows the power module in FIG. 3 alone, and is the figure which looked at the power module from the component mounting surface side. The perspective view which looked at the power module shown in FIG. 8 from the control module opposing surface side. The expansion perspective view which expands and shows the snap fit part in FIG. Explanatory drawing which shows the application | coating method of the flux with respect to a control module.

  1 to 11 are views showing a preferred embodiment of the present invention, in which FIG. 1 is an exploded perspective view showing an actuator unit to which an electronic control device according to the present invention is applied, and FIG. 2 is shown in FIG. It is the disassembled perspective view which looked at the actuator unit from another angle. 3 is an exploded perspective view of the electronic control device, FIG. 4 is a cross-sectional view taken along line AA of the electronic control device shown in FIG. 2, and FIG. 5 is a plan view showing the electronic control device with the cover removed. It is.

  The actuator unit 1 shown in FIGS. 1 and 2 is used in an electric brake booster mounted on an automobile, and is an electric actuator that is driven by three-phase AC power and controls the hydraulic pressure of the brake fluid. There is provided an electric motor 2 and a motor control device 3 as an electronic control device that drives and controls the electric motor 2 based on a brake operation by a driver and a driving state of an automobile. In addition, although illustration is abbreviate | omitted, the electric motor 2 will move forward and backward the piston which is not shown in figure which controls the hydraulic pressure of brake fluid with what is called a ball screw mechanism.

  A pair of pedestal portions 5 extending in the axial direction of the electric motor 2 are formed on the outer surface of the motor housing 4 that is an actuator housing of the electric motor 2 at a predetermined interval in the direction perpendicular to the axis of the electric motor 2. Yes. Circular seating surfaces 6 each having a screw hole 6a are formed at both ends in the longitudinal direction of both pedestal portions 5 so as to project from each other, while a case 12 (to be described later) of the casing 7 of the motor control device 3 is formed. Are formed with four leg portions 8 respectively seated on the respective seating surfaces 6 on the motor housing 4 side. Then, the motor control device 3 is fixed to the electric motor 2 by the four control device mounting screws 9 screwed into the screw holes 6a on the motor housing 4 side while inserting the leg portions 8 on the housing 7 side. become.

  On the other hand, when the housing 7 of the motor control device 3 is fixed to the motor housing 4, a substantially flat rectangular tubular wall 10 is formed at a position between the pedestal portions 5 of the motor housing 4. The stator connecting portion 20 and the sensor connecting portion 23 on the motor control device 3 side face the motor housing 4 through the opening 11 that opens to the inner peripheral side of the cylindrical wall 10. The stator connecting portion 20 is connected to a stator (not shown) in the motor housing 4, and the sensor connecting portion 23 is connected to a rotational position sensor (not shown) in the motor housing 4. As is well known, the rotational position sensor detects the rotational position of a rotor (not shown) provided in the motor housing 4, and the output signal of the rotational position sensor is a motor control device. 3 is used for the drive control of the electric motor 2 by 3. Further, a closed loop groove 10a is formed at the tip of the cylindrical wall 10, and a seal member (not shown) disposed in the groove 10a is in pressure contact with the bottom wall 13 of the case 12, so that the motor housing The inside and outside of 4 are sealed.

  As shown in FIG. 3 in addition to FIGS. 1 and 2, the housing 7 of the motor control device 3 has a bottom wall 13 and a peripheral wall 14, and is a metal case 12 having a substantially rectangular shape in plan view that opens upward. And a metal cover 15 having a substantially rectangular shape in plan view that closes the opening of the case 12, and a control module that is a first circuit board from the cover 15 side inside the housing 7. 17 and the power module 16 which is the second circuit board, and both 16 and 17 are stacked and arranged at a predetermined interval. The housing 7 is fixed to the motor housing 4 with the bottom wall 13 of the case 12 facing the motor housing 4 side.

  As shown in FIG. 4 in addition to FIG. 3, the cover 15 is formed by pressing a metal plate into a substantially dish shape, and bulges toward the opposite side of the case 12 to accommodate the control module 17. The bulging portion 43 as the first circuit board housing portion, the flange portion 44 extending from the outer peripheral edge of the bulging portion 43 toward the outer peripheral side, and the outer peripheral edge of the flange portion 44 facing downward (case 12 side) ) And a protruding edge portion 45 that is bent.

  On the other hand, as shown in FIG. 6 in addition to FIG. 3, the case 12 is molded by a so-called aluminum die casting method, and one side of the peripheral wall 14 having a substantially rectangular shape in plan view is included in the case 12. An opening 36 for receiving an external connection connector 19 described later on the power module 16 side is cut out from above. The opening 36 has a shape that matches the flange 19a formed at the base of the external connector 19, and the opening edge of the opening 36 is flanged by a sealing material (not shown). The part 19a is bonded and fixed.

  A seal groove 46 that is continuous in a closed loop shape is formed as a receiving groove at the open end of the peripheral wall 14 including the flange portion 19a in the case 12. 3 and 6 indicate cooling fins formed on the outer surface of the case 12, and reference numeral 41 in FIG. 6 is formed through the peripheral wall 14 so that air can pass but water cannot pass. A breathing hole to which a breathing filter 42 (see FIGS. 1 and 2) is attached is shown.

  As shown in an enlarged view in FIG. 7, the seal groove 46 is formed between an outer peripheral side wall 52 surrounding the outer peripheral side of the seal groove 46 and an inner peripheral side wall 53 surrounding the inner peripheral side of the seal groove 46. A thermosetting adhesive 54 having sealing properties is applied in the seal groove 46. The protrusion 45 on the cover 15 side is immersed in the adhesive 54. That is, as will be described in detail later, a liquid or paste adhesive 54 is applied into the seal groove 46, and the protrusion 45 on the cover 15 side is immersed in the adhesive 54, and the adhesive 54 is cured in this state. By doing so, the cover 15 and the case 12 are bonded and fixed, and the space between the two 12 and 15 is liquid-tightly sealed.

  Further, the seal groove 46 has a height h1 of the inner peripheral surface 46a formed by the outer peripheral side wall 52 of the seal groove 46 and the inner peripheral side wall 53 of the seal groove 46. It is formed to be higher than the height h2 of the inner side surface 46b on the circumferential side. Here, the heights h1 and h2 of both inner side surfaces 46a and 46b mean the distance from the bottom surface 46c of the groove 46 to the upper ends of both inner side surfaces 46a and 46b. Thus, when the adhesive 54 overflows from the seal groove 46 as the protrusion 45 on the cover 15 side is immersed in the adhesive 54 before curing, the adhesive 54 overflows from the seal groove 46. However, it flows into the cover 15 through a gap G between the flange portion 44 of the cover 15 and the side wall 53 on the inner peripheral side of the case 12.

  That is, when the adhesive 54 is cured in a state where the adhesive 54 overflows to the outside of the housing 7, the adhesive 54 peels off from the overflowed portion, and the sealing performance of the housing 7 is increased. Therefore, the adhesive 54 overflowing from the seal groove 46 is allowed to flow inside the housing 7 before being cured. At the same time, the tip of the inner peripheral side wall 53 of the case 12 and the flange portion 44 of the cover 15 are bonded to each other by the adhesive 54 overflowing from the seal groove 46 into the housing 7. 15 is more firmly bonded and fixed, and the sealing performance between the case 12 and the cover 15 is improved.

  5 and 6, at least one of the side walls 52 and 53 is separated from the other at a predetermined position in the longitudinal direction of the seal groove 46, specifically, at a position near the four corners of the seal groove 46. A widened portion 47 that is partially wider than the general portion is formed by being curved so as to be convex toward the direction, and a boss portion is formed at a substantially central portion of each widened portion 47. 50 is formed to project.

  The flange portion 44 on the cover 15 side is seated on the front end surface of each boss portion 50, while the mounting hole 44 a (see FIG. 3) is located at a position corresponding to each boss portion 51 on the flange portion 44 on the cover 15 side. The cover 15 and the case 12 are fastened and fixed by a plurality of cover mounting screws 34 that are inserted through the mounting holes 44a and screwed to the inner peripheral side of the boss portion 51. Yes. That is, the cover 15 and the case 12 are positioned in the approaching / separating direction of the cover 15 by the flange portion 44 seated on the front end surface of each boss portion 51. As a result, as shown in FIG. A gap G is formed between the flange portion 44 and the side wall 53 on the inner peripheral side of the case 12.

  Further, the bottom wall 13 of the case 12 includes a substantially cylindrical power module support portion 37 that protrudes from the positions near the four corners of the bottom wall 13 toward the cover 15, and the power module 16 of the bottom wall 13. And a block-shaped protrusion 38 that is a substantially rectangular protrusion in plan view that protrudes toward the cover 15 from a position corresponding to a switching element mounting area A (see FIG. 8) described later on the side. In addition, a power supply terminal insertion hole 39 is formed in a corner portion formed by the bottom wall 13 and the block-shaped protrusion 38, and a connector insertion hole 40 is formed through the corner portion formed by the block-shaped protrusion 38 and the peripheral wall 14.

  On the other hand, as shown in FIG. 8, the power module 16 is formed of a resin material in a substantially flat plate shape, a plate-like base portion 18 in which a large number of metal bus bars are embedded, and the bottom of the case 12 of the plate-like base portion 18. Various electronic components mounted on the component mounting surface 18a facing the wall 13 are formed integrally with one end edge of the plate-like base 18 and face the outside through the opening 36 on the case 12 side (see FIG. 2), an external connection connector 19 for transmitting and receiving signals and electric power to and from an external electronic device, and a projectingly provided substantially at the center of the component mounting surface 18a of the plate-like base 18, and a stator (not shown) of the electric motor 2 Of the component mounting surface 18a of the plate-like base 18 and projecting from one end of the stator connecting portion 20 between the stator connecting portion 20 and the rotational position sensor (not shown). ) And electrical And a, a sensor connection portion 23 connected.

  The stator connection portion 20 includes three power supply terminals 21 arranged in a direction orthogonal to one edge of the plate-like base 18 where the external connection connector 19 is formed, and component mounting of the plate-like base 18. And a covering portion 22 having a substantially flat rectangular cross section that protrudes from the surface 18 a and covers the base portion of each power supply terminal 21. On the other hand, the sensor connection portion 23 is configured by housing a plurality of terminals (not shown) in a connector housing having a substantially flat rectangular cross section with the alignment direction of the power supply terminals 21 as a longitudinal direction.

  Next, various electronic components mounted on the component mounting surface 18a of the plate-like base portion 18 will be described in detail. A plane between the stator connection portion 20 and the sensor connection portion 23 on the component mounting surface 18a is flat. A switching element mounting region A surrounded by the substantially rectangular protrusion 18b is formed as a heat generating component mounting region, and six switching elements 24 as heat generating components are mounted in the switching element mounting region A. Each of these switching elements 24 constitutes a known inverter circuit that converts DC power supplied via the external connector 19 into three-phase AC power. The three-phase AC power that is the output of the inverter circuit is supplied to the electric motor 2 via the stator connection portion 20 and rotationally drives the electric motor 2. In the present embodiment, a so-called MOSFET (field effect transistor) is used as each switching element 24.

  In addition, the component mounting surface 18a of the plate-like base 18 has a pair of first electrolytic capacitors 25 formed in a substantially cylindrical shape protruding in a direction perpendicular to the surface of the component mounting surface 18a, and also in a direction perpendicular to the surface of the component mounting surface 18a. A pair of second electrolytic capacitors 26, a plurality of ceramic capacitors 27, and a plurality of shunts for detecting an electric current. A normal mode coil 30 and a common mode coil 31 functioning as noise filter parts for noise removal are mounted together with the resistor 28, a pair of relays 29 for circuit protection, and first and second electrolytic capacitors 25 and 26, respectively. .

  The power module 16 includes the power connector support portion 37 and the power connector support portion 37 while the stator connection portion 20 is inserted into the power supply terminal insertion hole 39 on the case 12 side and the sensor connection portion 23 is inserted into the connector insertion hole 40 on the case 12 side. In a state where the plate-like base 18 is placed on the block-like protrusion 38, the plurality of mounting holes 32 penetrating the plate-like base 18 are inserted into the respective power module support portions 37 and the block-like protrusion 38, respectively. It is fastened and fixed to the case 12 by a plurality of power module mounting screws 35 that are screwed into the formed screw holes 37a, 38a. As a result, the plate-like base portion 18 of the power module 16 is held at a position spaced apart from the bottom wall 13 of the case 12 and mounted on the switching element mounting region A of the plate-like base portion 18. Each switching element 24 is in contact with the upper surface of the block-shaped protrusion 38. Although illustration is omitted, thermal conductive grease is interposed between the upper surface of the block-shaped protrusion 38 and each switching element 24, and the heat generated by each switching element 24 passes through the thermal conductive grease. And transmitted to the block-shaped protrusion 38. The heat conductive grease may be an elastic sheet-like heat conductor (for example, a heat conductive sheet).

  As shown in FIGS. 3 and 9, the control module facing surface 18c on the opposite side of the component mounting surface 18a of the plate-like base 18 protrudes from the outer peripheral edge of the control module facing surface 18a in the direction perpendicular to the surface. A plurality of snap fit portions 55 for engaging and holding the control module 17 by a so-called snap fit method are formed, and a plurality of connection terminals 60 for electrically connecting the power module 16 and the control module 17 are provided. ing.

  FIG. 10 is an enlarged perspective view showing the snap fit portion 55 in a state where the control module 17 is engaged and held. In FIG. 10, only one of the snap fit portions 55 is illustrated, but the other snap fit portions 55 are similarly configured.

  As shown in FIG. 10, the snap fit portion 55 includes a substantially cylindrical control module support portion 56 on which the power module facing surface 17 a on the power module 16 side of the control module 17 is seated, and the vicinity of the control module support portion 56. And a holding piece 57 provided on the head. The holding piece 57 is formed by forming a claw 59 projecting toward the control module 17 at the tip of the columnar base 58 having a substantially flat cross section projecting from the control module facing surface 18c of the plate-shaped base 18. The lower surface of the claw portion 59 is formed as an engaging surface 59a for the control module 17 while being inclined downward, while the upper surface of the claw portion 59 is formed as a guide surface 59b that is smoothly curved and inclined upward.

  The power module facing surface 17a of the control module 17 is seated on the control module support portion 56, and the engaging surface 59a of the claw portion 59 is engaged with the cover facing surface 17b of the control module 17. Thereby, as shown in FIG. 4 in addition to FIG. 10, the control module 17 is positioned at a predetermined interval in the direction perpendicular to the plane with respect to the plate-like base 18 on the power module 16 side, specifically, the case 12. It is positioned and held by each snap fit portion 55 at a position closer to the cover 15 than the opening end, and is accommodated in the bulging portion 43 of the cover 15. That is, the control module 17 is supported by the case 12 via the power module 17.

  As shown in FIGS. 3 and 4, the control module 17 forms conductor patterns (not shown) on both the front and back surfaces of a substrate made of a non-conductive resin material typified by glass epoxy resin. It is configured by mounting a large number of electronic components (not shown), and at the position corresponding to each holding piece 57 on the outer peripheral edge of the control module 17, among the holding pieces 57. Cutout portions 17c having a shape matching the cross-sectional shape of the columnar base portion 58 are formed. That is, the control module 17 is positioned in a direction parallel to the control module 17 by receiving the columnar base 58 of each holding piece 57 in each notch 17c.

  As shown in FIGS. 3 and 5, through holes 61 through which the connection terminals 60 are inserted are formed at positions corresponding to the connection terminals 60 on the power module 16 side of the control module 17. Yes. Then, each connection terminal 60 on the power module 16 side passes through each through hole 61 and protrudes from the control module 17 to the cover 15 side, and has solder (not shown) attached to the cover facing surface 17b of the control module 17. The through holes 61 are electrically connected to each other. As a result, the control module 17 inputs information related to the brake operation by the driver and the driving state of the vehicle via the external connection connector 19 and each connection terminal 52, and also generates a drive command signal generated based on the information. The electric power is output to each switching element 24 via the connection terminal 52, and the switching operation of each switching element 24 is performed to drive and control the electric motor 2.

  Next, an assembly procedure of the motor control device 3 configured as described above will be described. In assembling the motor control device 3, first, the stator connection portion 20 of the power module 16 is connected to the power supply terminal insertion hole 39 on the case 12 side, and the sensor connection portion 23 of the power module 16 is connected to the connector insertion hole 40 on the case 12 side. The plate-like base portion 18 is placed on each power module support portion 37 while being inserted, and the power module 16 is fastened and fixed to the case 12 by each power module mounting screw 35.

  Next, as shown in FIGS. 5 and 10, the control module 17 is assembled to the power module 16. Specifically, each connection terminal 60 on the power module 16 side is inserted into each through hole 61 of the control module 17, and the outer edge portion of each notch portion 17 c of the control module 17 is connected to each holding piece 57 on the power module 16 side. Of these, they are brought into contact with the guide surfaces 59b of the claw portions 59, respectively. When inserting each connection terminal 60 on the power module 16 side into each through hole 61 of the control module 17, an end portion of each connection terminal 60 that protrudes toward the control module 17 side from the opening end of the case 12. May be positioned at a predetermined position by a known comb-like jig (not shown).

  Then, by pressing the control module 17 toward the power module 16, each holding piece 57 is brought into contact with the inclined surface between the guide surface 59 b of the claw portion 59 and the edge of the control module 16 among the holding pieces 57. Each holding piece 57 receives the control module 17 at a position between the claw portion 59 and the control module support portion 53 and then receives the control module 17 by the restoring force based on the bending deformation. The engaging surface 59a of the claw portion 59 is engaged with the cover facing surface 17b. As a result, the control module 17 is positioned and supported by each snap fit portion 55 at a position closer to the cover 15 than the opening end 12b of the case 12 by a so-called snap fit method.

  Thereafter, each connection terminal 60 on the power module 16 side and each through hole 61 on the control module 17 side are electrically connected by soldering. The solder for electrically connecting each connection terminal 60 on the power module 16 side and each through-hole 61 on the control module 17 side is a predetermined position on the cover facing surface 17a of the control module 17 by a so-called flow soldering method. Will adhere to. Then, a liquid or paste adhesive 54 is applied to the seal groove 46 of the case 12, and the opening of the case 12 is closed by the cover 15 while the protruding edge 45 on the cover 15 side is immersed in the adhesive 54. Cover.

  Then, if the opening of the case 12 is closed by the cover 15 in this way, the cover 15 and the case 12 are fastened and fixed by the cover mounting screws 34, and then the adhesive 54 is cured by heating. The assembly of the motor control device 3 is completed.

  Here, when the connection terminals 60 on the power module 16 side and the through holes 61 on the control module 17 side are electrically connected, the solder is attached to the cover facing surface 17b of the control module 17 prior to soldering. Then, a flux for facilitating the soldering is applied to a region of the cover facing surface 17b where the solder is to be adhered.

  Specifically, as shown in FIG. 11, first, the case 12 in which the power module 16 and the control module 17 are assembled as described above is supported so that the cover facing surface 17b of the control module 17 faces downward, and the case 12 with the mask plate 51 arranged at a position between the open end of 12 and the control module 17 covering the seal groove 46 of the case 12, and sprayed from a spray nozzle 62 provided at a position below the control module 17. The flux F is applied to the region of the cover facing surface 17b of the control module 17 where solder is to be adhered. 11 illustrates an example in which the flux F is applied to the periphery of the through hole 61 provided at one end edge of the control module 17 so as to be electrically connected to the connection terminal 60 extending from the external connection connector 19. Similarly, the flux F is applied to the periphery of the other through holes 61.

  That is, in the present embodiment, the control module 17 is provided at a position closer to the cover 15 than the opening end of the case 12, that is, a position closer to the spray nozzle 62 than the seal groove 46 on the case 12 side. 15, a flange portion 44 is formed between the bulging portion 43 that accommodates the control module 17 and the protruding edge portion 45 inserted into the seal groove 46, whereby the outer peripheral edge of the control module 17 and the seal groove are formed. 46 is spaced apart in the extending direction of the flange portion 44, the adhesion of the flux F sprayed from the spray nozzle 62 to the seal groove 46 is suppressed.

  In addition, when the flux F is applied, the mask plate 51 that covers the seal groove 46 on the case 12 side is disposed at a position between the opening end of the case 12 and the control module 17, so that the mask plate 51 and the control module 17 Since the gap C between them is directed to the side opposite to the seal groove 46 when viewed from the spray nozzle 62 side, the flux F sprayed from the spray nozzle 62 may adhere to the seal groove 46 via the gap C. It is suppressed.

  Therefore, according to the present embodiment, it is possible to suppress the curing of the adhesive 54 from being inhibited by the flux F attached to the seal groove 46 and to suppress the decrease in the adhesiveness between the case 12 and the cover 15. .

7 ... Case 12 ... Case 15 ... Cover 16 ... Power module (second circuit board)
17 ... Control module (first circuit board)
43 ... bulge part (first circuit board housing part)
44 ... Flange 45 ... Projection edge 46 ... Seal groove (receiving groove)
46a: inner surface on the outer peripheral side of the seal groove 46b ... inner surface on the inner peripheral side of the seal groove 54: adhesive

Claims (3)

The two circuit boards are superposed in the order of the first circuit board and the second circuit board from the cover side in the inside of the case consisting of a case that opens toward one side and a cover that closes the opening of the case. The first circuit board is electrically connected to the second circuit board by solder disposed on the cover side surface of the first circuit board, and applied to the open end of the case. In the electronic control device in which the case and the cover are bonded and fixed with the adhesive made,
The electronic control device according to claim 1, wherein the first circuit board is supported by the case at a position closer to the cover than the opening end of the case and is accommodated in the cover. While the receiving groove along the longitudinal direction of the opening end is formed at the opening end of the case, and the adhesive is applied in the receiving groove,
The cover bulges toward the opposite side of the case and accommodates the first circuit board housing part, and extends from the outer periphery of the first circuit board housing part toward the outer peripheral side. The electronic control device according to claim 1, further comprising: a flange portion to be bent; and a projecting edge portion which is bent at an outer peripheral edge of the flange portion and is immersed in the adhesive in the receiving groove.   The electronic control device according to claim 2, wherein an inner surface on the outer peripheral side of the receiving groove is formed higher than an inner surface on the inner peripheral side of the receiving groove.

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