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WO2024232040A1 - Dispositif de commande électronique et son procédé de fabrication - Google Patents

Dispositif de commande électronique et son procédé de fabrication Download PDF

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Publication number
WO2024232040A1
WO2024232040A1 PCT/JP2023/017554 JP2023017554W WO2024232040A1 WO 2024232040 A1 WO2024232040 A1 WO 2024232040A1 JP 2023017554 W JP2023017554 W JP 2023017554W WO 2024232040 A1 WO2024232040 A1 WO 2024232040A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
printed circuit
longitudinal
electronic control
control device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/JP2023/017554
Other languages
English (en)
Japanese (ja)
Inventor
依実香 加藤
桂一 太刀岡
晴記 落合
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Astemo Ltd
Original Assignee
Hitachi Astemo Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Astemo Ltd filed Critical Hitachi Astemo Ltd
Priority to PCT/JP2023/017554 priority Critical patent/WO2024232040A1/fr
Priority to CN202380096117.1A priority patent/CN120937509A/zh
Priority to JP2025519247A priority patent/JPWO2024232040A1/ja
Publication of WO2024232040A1 publication Critical patent/WO2024232040A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/22—Secondary treatment of printed circuits
    • H05K3/28—Applying non-metallic protective coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus

Definitions

  • the present invention relates to an electronic control device equipped with a printed circuit board sealed with resin.
  • Patent Document 1 An electronic control device according to conventional technology is disclosed in Patent Document 1.
  • the electronic control device disclosed in Patent Document 1 includes a printed circuit board on which electronic components are mounted, and a connector that is attached to the edge of the printed circuit board and can be connected to an external device.
  • the electronic control device further includes a case that houses the printed circuit board excluding the connector, and a resin sealing member that is filled in the case and seals the electronic components and printed circuit board. It is desirable to be able to manufacture the electronic control device at low cost.
  • An object of the present invention is to provide an electronic control device that can be manufactured at reduced cost.
  • a rectangular printed circuit board having a width direction edge extending in a width direction and two length direction edges extending in a length direction L perpendicular to the width direction; a connector mounted on an edge of the printed circuit board in the width direction and connectable to an external device; a resin sealing member that seals the printed circuit board; a longitudinal member provided along the longitudinal edge; When viewed along the longitudinal edge, An electronic control device is provided in which the longitudinal member is integrally formed with a joint portion joined to the sealing member and a protrusion portion that is integral with the joint portion and protrudes from the sealing member.
  • the protrusion has a first protrusion extending along the longitudinal edge and a second protrusion located at an end of the first protrusion and protruding further than the first protrusion.
  • the joint portion has a mating recess that is recessed so that the longitudinal edge of the printed circuit board fits therein.
  • the longitudinal member has a fitting recess that is recessed so that the longitudinal edge of the printed circuit board fits into the fitting recess,
  • the placing step First, the longitudinal edge of the printed circuit board is fitted into the fitting recess of the longitudinal member to obtain a printed circuit board with a longitudinal member;
  • the printed circuit board with the longitudinal members is fitted into the supporting portion of the molding die.
  • the longitudinal member has a fitting recess that is recessed so that the longitudinal edge of the printed circuit board fits into the fitting recess,
  • the placing step First, the elongate member is fitted into the support portion of the mold; Next, the printed circuit board is placed inside the mold by sliding the longitudinal edge along the mating recess of the longitudinal member.
  • the present invention can provide an electronic control device with reduced manufacturing costs.
  • Fig. 1A is a perspective view of an electronic control device according to an embodiment
  • Fig. 1B is a view taken along the line 1B in Fig. 1A
  • Fig. 1C is a view taken along the line 1C in Fig. 1A
  • Fig. 2A is a cross-sectional view taken along line 2A-2A in Fig. 1B
  • Fig. 2B is a cross-sectional view of an end of the electronic control device
  • Fig. 2C is a view taken along the arrow 2C in Fig. 2B
  • Fig. 3A is a diagram for explaining a preparation step
  • Fig. 3B is a perspective view of a printed circuit board with longitudinal members.
  • FIG. 4A is a diagram for explaining the arrangement step
  • Fig. 4B is an enlarged view of a support part of the molding die
  • Fig. 4C is a diagram for explaining the configuration of a longitudinal member supported by the support part.
  • Fig. 5A is a diagram illustrating the filling step
  • Fig. 5B is a diagram illustrating the demolding step.
  • Fig. 6A is a diagram for explaining a demolding process according to the conventional technique
  • Fig. 6B is a diagram for explaining the operation according to the embodiment.
  • Fig. 7A is a diagram illustrating a method for attaching a longitudinal member to a support portion of a molding die
  • Fig. 7B is a diagram illustrating a method for attaching a printed circuit board to the support portion.
  • FIG. 1A shows an electronic control device 10 according to the embodiment.
  • This electronic control device 10 can be applied to, for example, an engine control unit, and can be attached to the body of a vehicle (for example, a four-wheeled vehicle or a two-wheeled vehicle).
  • a vehicle for example, a four-wheeled vehicle or a two-wheeled vehicle.
  • the electronic control device 10 includes a printed circuit board 20 on which electronic components 11, 11 are mounted, a connector 12 mounted on the printed circuit board 20 and capable of being electrically connected to an external device (not shown), and a resin sealing member 13 that seals the electronic components 11, 11 and the printed circuit board 20.
  • the printed circuit board 20 is a rectangular plate.
  • the direction in which one of the edges of the printed circuit board 20 extends is the width direction W, and the direction perpendicular to the width direction W is the length direction L.
  • the direction along the thickness of the printed circuit board 20 is the thickness direction T.
  • the printed circuit board 20 has a widthwise edge 21 extending in the width direction W, and two lengthwise edges 22, 22 extending in the lengthwise direction L.
  • the connector 12 is provided on the widthwise edge 21 and protrudes from the widthwise edge 21.
  • the insertion direction of the connector 12 is the length direction of the printed circuit board 20.
  • the shape and insertion direction of the connector 12 can be changed as appropriate.
  • the longitudinal members 30 having a longitudinal shape are provided adjacent to each longitudinal edge 22 of the printed circuit board 20.
  • the two longitudinal members 30, 30 sandwich the printed circuit board 20 in the width direction W.
  • the material of the longitudinal members 30 may be, for example, a resin such as PBT or the same material as the sealing resin 13, and any material is acceptable as long as it has a predetermined rigidity.
  • the length of the longitudinal members 30 may be longer or shorter than the length of the longitudinal edges 22 of the printed circuit board 20.
  • each longitudinal member 30 When viewed in a direction along the longitudinal edge 22 of the longitudinal members 30, each longitudinal member 30 has a joint 31 joined to the sealing member 13 and a protrusion 35 that is integral with the joint 31 and protrudes from the end face 13a of the sealing member 13.
  • the joint portion 31 is a portion embedded in the sealing member 13, and its surface is joined to the sealing member 13.
  • the cross-sectional shape of the joint portion 31 is not limited to a rectangular shape and can be changed as appropriate.
  • An inner surface 32 of the joint portion 31 (the surface facing the center of the width direction W of the printed circuit board 20) has a fitting recess 33 that is recessed so as to fit with the longitudinal edge 22 of the printed circuit board 20. With the thickness direction T of the printed circuit board 20 as the reference, the fitting recess 33 is located in the center.
  • the protrusion 35 has a first protrusion 40 extending along the longitudinal edge 22, and two second protrusions 50, 50 located at both ends of the first protrusion 40 in the longitudinal direction and protruding beyond the first protrusion 40.
  • space S is formed on the side of the first protrusion 40 (the direction in which the end surface 22a of the longitudinal edge 22 faces).
  • This space S is a space surrounded by a plane including the side surface 51 of the second protrusion 50, a plane including the upper surface 52 (the surface in the direction in which the connector surface 20a faces), a plane including the lower surface 53 (the surface in the direction in which the opposite surface 20b faces), and the side surface 41 of the first protrusion 40.
  • the up-down direction is used for explaining the embodiment, and does not limit the orientation of the electronic control device 10 during manufacture, installation, and use.
  • the side surface 41 of the first protrusion 40 has a convex shape that protrudes laterally from its center (based on the thickness direction T of the printed circuit board 20), so the space S is approximately U-shaped. Note that the side surface 41 of the first protrusion 40 may be a flat surface. If the side surface 41 is a flat surface, the space S will be rectangular.
  • the upper surface 52 of the second protrusion 50 and the upper surface 42 of the first protrusion 40 are located on the same plane.
  • the lower surface 53 of the second protrusion 50 and the lower surface 43 of the first protrusion 40 are located on the same plane.
  • molding die 60 having a cavity 60A is prepared.
  • the molding die 60 is divided in the thickness direction T of the printed circuit board 20 into a first die 61 and a second die 62. It has a second mold 62.
  • the molding die 60 has two support portions 63, 63 that are recessed so as to be able to support the longitudinal member 30.
  • Each support portion 63 is formed from the first die 61 to the second die 62.
  • a portion where the first die 61 and the second die 62 overlap each other is defined as an overlapping portion 64.
  • the support portion 63 has a bottom surface 65 that includes an end portion 64a on the inside (the cavity 60A side) of the overlapping portion 64 and extends along the thickness direction T of the printed circuit board 20, and a first wall surface 66 and a second wall surface 67 that extend from both ends of the bottom surface 65 along the width direction W of the printed circuit board 20.
  • the printed circuit board 20A with the longitudinal members is fitted into the support parts 63, 63. This positions the longitudinal members 30, 30 and the printed circuit board 20 inside the molding die 60.
  • the cavity 60A of the molding die 60 is filled with the molten resin R.
  • the method of filling the molten resin R can be selected appropriately. For example, as shown in Fig. 5A, the opening 60A of the molding die 60 may be directed upward, and the molten resin R may simply be poured in without applying pressure to it. Alternatively, pressure may be applied to the molten resin R to fill the cavity 60A with the molten resin R.
  • a parting line 13C extending in the width direction W is formed on the end surface 13b of the sealing member 13 opposite the connector 12. See Fig. 1C. When viewed from the direction along the longitudinal edge 22, the parting line 13C is located between the two longitudinal members 30, 30.
  • the electronic control device 10 includes a rectangular plate-shaped printed circuit board 20 having a widthwise edge 21 extending in a width direction W and two lengthwise edges 22 extending in a length direction L perpendicular to the width direction W, a connector 12 mounted on the widthwise edge 21 of the printed circuit board 20 and connectable to an external device, a resin sealing member 13 sealing the printed circuit board 20, and two longitudinal members 30 provided along each of the lengthwise edges 22 and sandwiching the printed circuit board 20 in the width direction W.
  • each longitudinal member 30 is integrally formed with a joint 31 that is joined to the sealing member 13 and a protrusion 35 that is integral with the joint 31 and protrudes from the sealing member 13.
  • the electronic control device 10 does not have a case, which reduces manufacturing costs.
  • the conventional demolding process involves pulling out the electronic control device 100 from the mold 101.
  • closed spaces 103, 103 are formed between the sealing member 104 of the electronic control device 10 and the mold 60.
  • the pressure in the closed spaces 103, 103 becomes negative, making it difficult to pull out the electronic control device 100.
  • the manufacturing method of the electronic control device 10 includes a preparation process (see FIG. 3A) for preparing the printed circuit board 20 and two longitudinal members 30, an arrangement process (see FIG. 3B and FIG. 4A) for arranging the longitudinal members 30 and the printed circuit board 20 inside a molding die 60 having a first die 61 and a second die 62 that are divided in the thickness direction T of the printed circuit board 20, and a filling process (see FIG. 5A) for filling the inside of the molding die 60 with molten resin.
  • the molding die 60 has two support portions 63 that are recessed so as to support the longitudinal member 30 during the placement process.
  • Each support portion 63 is formed from the first die 61 to the second die.
  • the electronic control device 10 does not have a case, which helps reduce manufacturing costs.
  • the protruding portion 35 has a first protruding portion 40 extending along the longitudinal edge 22, and two second protruding portions 50 located at both ends of the first protruding portion 40 and protruding further than the first protruding portion 40. Therefore, when the longitudinal member 30 is supported by the supporting portion 63, a space S is formed between the supporting portion 63 and the longitudinal member 30. Compared to an embodiment in which the longitudinal member 30 has a rectangular cross section without providing the space S, air is more likely to enter the inside of the molding die 60.
  • the joint portion 31 of the longitudinal member 30 has a fitting recess 33 that is recessed so that the longitudinal edge 22 of the printed circuit board 20 fits therein. Therefore, the longitudinal member 30 can be fixed to the printed circuit board 20.
  • the placement step first, the longitudinal edge 22 of the printed circuit board 20 is fitted into the fitting recess 33 formed in the longitudinal member 30. Next, the longitudinal member 30 to which the printed circuit board 20 is attached is fitted into the support portion 63 of the molding die 60. The printed circuit board 20 and the longitudinal member 30 can be placed in the molding die 60 at one time.
  • the printed circuit board 20 may be placed inside the mold 60 by first fitting the longitudinal member 30 to the support portion 63 of the longitudinal member 30 and then sliding the longitudinal edge 22 along the fitting recess 33 of the longitudinal member 30.
  • the present invention is not limited to the examples.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Non-Metallic Protective Coatings For Printed Circuits (AREA)

Abstract

Dispositif de commande électronique (10) pourvu d'éléments longitudinaux (30) ayant une forme longitudinale et disposés le long de deux bords longitudinaux (22, 22) d'une carte de circuit imprimé (20). Les éléments longitudinaux (30) sont chacun construits de telle sorte que, lorsqu'ils sont vus depuis une direction le long des bords longitudinaux (22), une partie liée (31), qui est liée à un élément d'étanchéité en résine (13) scellant la carte de circuit imprimé (20), et une partie en saillie (35), qui est intégrée à la partie liée (31) et fait saillie de l'élément d'étanchéité (13), sont intégrées.
PCT/JP2023/017554 2023-05-10 2023-05-10 Dispositif de commande électronique et son procédé de fabrication Pending WO2024232040A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2023/017554 WO2024232040A1 (fr) 2023-05-10 2023-05-10 Dispositif de commande électronique et son procédé de fabrication
CN202380096117.1A CN120937509A (zh) 2023-05-10 2023-05-10 电子控制装置及其制造方法
JP2025519247A JPWO2024232040A1 (fr) 2023-05-10 2023-05-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/017554 WO2024232040A1 (fr) 2023-05-10 2023-05-10 Dispositif de commande électronique et son procédé de fabrication

Publications (1)

Publication Number Publication Date
WO2024232040A1 true WO2024232040A1 (fr) 2024-11-14

Family

ID=93431490

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/017554 Pending WO2024232040A1 (fr) 2023-05-10 2023-05-10 Dispositif de commande électronique et son procédé de fabrication

Country Status (3)

Country Link
JP (1) JPWO2024232040A1 (fr)
CN (1) CN120937509A (fr)
WO (1) WO2024232040A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5488667U (fr) * 1977-12-07 1979-06-22
JPH01133766U (fr) * 1988-03-08 1989-09-12
JP2000151123A (ja) * 1998-11-05 2000-05-30 Oki Electric Ind Co Ltd 電子回路ユニット
JP2013258184A (ja) * 2012-06-11 2013-12-26 Hitachi Automotive Systems Ltd 車載用電子制御装置
JP2019021667A (ja) * 2017-07-12 2019-02-07 株式会社オートネットワーク技術研究所 回路装置、回路装置の製造方法、およびコネクタ
JP2020047840A (ja) * 2018-09-20 2020-03-26 日立オートモティブシステムズ株式会社 電子制御装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5488667U (fr) * 1977-12-07 1979-06-22
JPH01133766U (fr) * 1988-03-08 1989-09-12
JP2000151123A (ja) * 1998-11-05 2000-05-30 Oki Electric Ind Co Ltd 電子回路ユニット
JP2013258184A (ja) * 2012-06-11 2013-12-26 Hitachi Automotive Systems Ltd 車載用電子制御装置
JP2019021667A (ja) * 2017-07-12 2019-02-07 株式会社オートネットワーク技術研究所 回路装置、回路装置の製造方法、およびコネクタ
JP2020047840A (ja) * 2018-09-20 2020-03-26 日立オートモティブシステムズ株式会社 電子制御装置

Also Published As

Publication number Publication date
CN120937509A (zh) 2025-11-11
JPWO2024232040A1 (fr) 2024-11-14

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