WO2014092063A1 - Electronic control device - Google Patents

Electronic control device Download PDF

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Publication number
WO2014092063A1
WO2014092063A1 PCT/JP2013/083030 JP2013083030W WO2014092063A1 WO 2014092063 A1 WO2014092063 A1 WO 2014092063A1 JP 2013083030 W JP2013083030 W JP 2013083030W WO 2014092063 A1 WO2014092063 A1 WO 2014092063A1
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WO
WIPO (PCT)
Prior art keywords
circuit board
copper foil
foil pattern
hole
metal member
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PCT/JP2013/083030
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French (fr)
Japanese (ja)
Inventor
燕　哲也
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日本精機株式会社
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Publication date
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Publication of WO2014092063A1 publication Critical patent/WO2014092063A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles

Definitions

  • the present invention relates to an electronic control device, and more particularly to a connection structure between a metal member and a circuit board.
  • an electronic control device such as a vehicle instrument may use a molded case made of a synthetic resin material for weight reduction or electrical insulation.
  • the electronic device may malfunction due to unnecessary radiation or static electricity if the metal member is in an electrically floating state. Problems that may occur are not preferable. Therefore, in order to solve such a problem, a method of connecting an electrically floating metal member to a signal on the ground of the circuit board is employed.
  • Patent Document 1 there is one disclosed in Patent Document 1, and a plurality of pieces formed by being separated from each other by a solder resist layer around a hole for a mounting screw for attaching a circuit board to a conductive metal frame (metal member).
  • a small-diameter copper foil pattern land is provided, and the circuit board is mounted on the metal frame by mounting the mounting screw in the hole for the circuit board mounting screw, and the circuit board is installed on the metal frame via the copper foil pattern land.
  • the electronic control device equipped with these circuit boards forms a plurality of small-diameter copper foil pattern lands around a hole for a mounting screw attached to the metal frame, for example, at a position corresponding to the outer periphery of the mounting screw head.
  • the circuit board and the metal frame can be electrically connected, but depending on the tightening torque of the mounting screws. Cracks may occur in the solder on the small-diameter copper foil pattern land, and as a result, the electrical connection between the copper foil pattern land and the metal frame may not be maintained.
  • an object of the present invention is made by paying attention to the above-described problems, and an electronic control device that improves the reliability of electrical connection between a metal member and a circuit board when the metal member is fixed to the circuit board using a mounting screw. It is to provide.
  • An electronic control device of the present invention includes a conductive metal member, a circuit board that mounts the metal member and is electrically connected to the metal member, and a mounting screw that connects the metal member and the circuit board.
  • the circuit board is provided with a hole for mounting the mounting screw, a surface facing the metal member, and around the hole from the head of the mounting screw.
  • a plurality of first copper foil pattern lands formed at a position having a small diameter, and a plurality of surfaces formed on the surface facing the metal member and at a position larger in diameter than the head around the hole.
  • a second copper foil pattern land is provided, and electrical connection between the metal member and the circuit board is performed via the first and second copper foil pattern lands and solder provided on the copper foil pattern land. It is characterized by being done
  • a plurality of the first copper foil pattern lands are formed at the same distance from the hole.
  • a plurality of the second copper foil pattern lands are formed at the same distance from the hole.
  • the present invention can improve the reliability of electrical connection between the metal member and the circuit board when the metal member is fixed to the circuit board using a mounting screw with respect to the electronic control device.
  • the figure which shows the example of a display of the meter for vehicles in embodiment of this invention The figure which shows the cross section of the display apparatus for vehicles in embodiment same as the above.
  • FIG. 1 is a view showing a display example of a vehicle instrument
  • FIG. 2 shows a cross section thereof.
  • the vehicle instrument is a composite equipped with a pointer display unit 1, an image display unit 2, and various indicators 3 such as a direction indicator, a high beam of a headlamp, a gear position of a transmission, and various warning lights.
  • a circuit board 5 and a control means 6, a backlight 7, an external connection connector 8, and the like are mounted on the circuit board 5 in the housing 4.
  • the pointer display unit 1 is printed with a pointer 12 that rotates using a movement (motor) 11 mounted on the circuit board 5 as a drive source, and an indicator unit 13 that includes numerical values and scales to be indicated by the pointer 12. It consists of a display board 14.
  • the pointer display unit 1 is provided so that the indicator unit 13 and the pointer 12 can be illuminated by the backlight 7. In this case, the pointer display unit 1 operates the movement 11 according to the vehicle speed information input via the external communication connector 8 and the arithmetic processing or drive command by the control means 6, and the indicated position of the indicator unit 13 by the pointer 12. Thus, the traveling speed value of the vehicle can be displayed.
  • the image display unit 2 is provided with a display panel 21 that displays vehicle information such as desired measurement values and warnings as images by drive control by the control means 6. In this case, vehicle information such as the accumulated travel distance and fuel consumption is displayed on the display panel 21.
  • vehicle information such as the accumulated travel distance and fuel consumption is displayed on the display panel 21.
  • the display panel 21 is configured to be able to switch screens, and can display and output time and temperature information in addition to vehicle information.
  • the display panel 21 is connected to the control means 6 of the circuit board 5 through a flexible wiring (not shown).
  • the flexible wiring plays a role as a signal transmission line for transmitting an image signal to the display panel 21.
  • the display panel 21 may be one using a liquid crystal display element, and is held using a conductive metal frame (metal member) 22 together with a light source for backlight.
  • the display panel 21 is provided between the display board 14 and the circuit board 5 so that the display area can be exposed from the notch opening of the display board 14.
  • the spacer 23 made of synthetic resin is provided. Is held at a predetermined distance from the circuit board 5.
  • An electrogalvanized steel plate or the like can be applied to the metal frame 22, and the frame shape is such that the end portion of the display panel 21 outside the display area of the display panel 21 is suppressed, and the display frame 14 and the display panel 21 are In addition to being interposed therebetween, by being mounted on the circuit board 5, it is grounded so that static electricity from the display board 14 side can be transmitted to the ground terminal of the circuit board 5.
  • the ground connection structure between the metal frame 22 and the wiring pattern of the circuit board 5 is made using a mounting screw 24 as shown in FIG.
  • the mounting screw 24 is screwed to the spacer 23 so as to sandwich the circuit board 5 and the leg portion 25 formed extending from the metal frame 22. At this time, the solders 53 and 54 formed on the copper foil pattern lands 51 and 52 of the circuit board 5 and the legs 25 are electrically connected.
  • the copper foil pattern lands 51 and 52 are formed in the vicinity of the hole 55 through which the mounting screw 24 of the circuit board 25 is inserted, in particular, closer to the diameter of the head 24A of the mounting screw 24.
  • a plurality of first copper foil patterns 51 sandwiched between the contact surface 23A and the head portion 24A via the leg portion 25 and the solder 53 are provided, and further from the hole portion 55 of the circuit board 5 than the diameter of the head portion.
  • a plurality of second copper foil patterns 52 formed with solder 54 in contact with the legs 25 are provided.
  • a plurality of copper foil pattern lands 51 and 52 are provided concentrically from the center of the hole 55 for the mounting screw 24 and closer to the diameter 5A of the head 24A indicated by the dotted line.
  • the first copper foil pattern land 51 and a plurality of second copper foil pattern lands 52 provided concentrically outside the first copper foil pattern land 51 are formed in a small circular shape. Therefore, it is easy to make the height dimensions of the solders 53 and 54 formed on the copper foil pattern lands 51 and 52, avoiding the resist layer 56, and by providing a plurality, it is possible to secure a contact area.
  • the housing 4 holds and accommodates the display panel 21, the circuit board 5, the display board 14, and the like, and is a translucent material such as acrylic that can display the pointer display unit 1, the image display unit 2, and the indicator 3.
  • a front case 41 made of a synthetic resin and a back case 42 made of a light-shielding synthetic resin that holds each component and covers the circuit board 5 and the like are provided.
  • the housing 4 is made of an electrically insulating member.
  • the circuit board 5 is a hard wiring board on which a copper foil pattern is printed and formed as a meter printed board, and mounted with electronic components such as the movement 11, the backlight 7, the display panel 21, and the control means 6 described above.
  • the circuit board 5 is provided in parallel with a predetermined distance from the display board 14 and fixed to the back case 42 with screws.
  • the control means 6 drives and controls the movement 11, the display panel 21, and the light sources for various indicators 3 described above based on the vehicle information input via the external connection connector 8 and the wiring of the circuit board 5.
  • a microcomputer in which a predetermined program is stored in a storage unit can be applied.
  • the backlight 7 can be applied with a light emitting diode for transmitting and illuminating the pointer 12, the indicator portion 13 of the display board 14 and the like, and is driven and controlled by the control of the control means 6.
  • the control means 6 can adjust the light using the pulse width modulation control for the backlight 7 and can illuminate with the optimum luminance.
  • the external connection connector 8 is a connection member that connects to the harness 81 that connects the control means 6 and the electronic unit on the vehicle body side through the hole in the back side case 42 of the housing 4. Via the external connection connector 8 and the harness 81, the power supply of the vehicle meter is connected and the vehicle information is received (wired communication).
  • the external connection connector 8 includes a ground signal line terminal, and can connect not only each electronic component but also the metal frame 22 and the first and second copper foil pattern lands to the outside of the vehicle instrument. .
  • the circuit board 5 on which the control means 6 for displaying and controlling the vehicle information is mounted, and the metal frame 22 that can be grounded as well as the holding member of the display panel 21 is provided. it can.
  • the vehicle instrument includes a conductive metal frame 22, a circuit board 5 on which the metal frame 22 is mounted and a wiring pattern for electrically connecting to the metal frame 22, and the metal frame 22 and the circuit.
  • An electronic control device comprising a mounting screw for connecting to a board, wherein the circuit board 5 has a hole 55 for mounting the mounting screw 24 and a surface facing the metal frame 22 and a hole.
  • the head 24 ⁇ / b> A is opposed to the plurality of first copper foil pattern lands 51 and the metal frame 22 at a position smaller in diameter than the head 24 ⁇ / b> A of the mounting screw 24 around the hole 55 and around the hole 55.
  • a plurality of second copper foil pattern lands 52 formed at positions larger in diameter than the first and second copper foil patterns. La Takes place via a de 51, 52 and the solder 53, 54 provided on the copper foil pattern lands 51, 52.
  • the metal frame 22 and the circuit board 5 are connected by the mounting screw 24, the metal frame 22 and the circuit board 5 are sandwiched between the contact surface 23A of the spacer 23 and the head portion 24A of the mounting screw 24, and thus on the first copper foil pattern land 51.
  • the solder 53 is joined while being deformed.
  • the solder 54 of the second copper foil pattern land 52 sandwiched between the circuit board 5 and the leg portion 25 of the metal frame 22 is not applied with a larger pressure than the solder 53, the solder 54 is not deformed more than the solder 53. Electrical connection between the frame 22 and the circuit board 5 can be made.
  • solders 53 and 54 are in at least two states having different deformation amounts, the electrical connection state is maintained even when used for a long time in an environment with vibration, and the grounding is highly reliable.
  • the solder 54 of the second copper foil pattern land 52 that is provided at a position far from the mounting screw 24 and is not easily affected by the tightening torque by the mounting screw 24 is applied with a relatively small stress. Expected to be effective and effective.
  • first copper foil pattern lands 51 are formed at the same distance from the hole 55, and similarly, a plurality of second copper foil pattern lands 52 are formed at the same distance from the hole 55, thereby being attached.
  • the pressure applied to the solders 53 and 54 applied by tightening with the screws 24 can be evenly distributed so that no significant deformation occurs. Moreover, since a large contact area can be ensured, conductivity can be increased.
  • the vehicle display device of the present invention has been described by way of example in the configuration of the embodiment described above, but the present invention is not limited to this, and the gist of the present invention is also achieved in other configurations. It goes without saying that various improvements and display changes can be made without departing from the scope.
  • the present invention relates to an electronic control device, for example, suitable as a vehicle meter or a monitor mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Printed Circuit Boards And The Like (AREA)
  • Instrument Panels (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

Provided is an electronic control device that improves the reliability of an electrical connection between a metal member and a circuit board when a mounting screw is used to fix the metal member to the circuit board. The circuit board (5) comprises: a hole (55) for mounting a mounting screw (24); a plurality of first copper foil pattern lands (51) that are formed around the hole (55) at a position that is on the opposite surface from a metal frame (22) and that has a smaller diameter than the head section (24A) of the mounting screw (24); and a plurality of second copper foil pattern lands (52) that are formed around the hole (55) at a position that is on the opposite surface from the metal frame (22) and that has a larger diameter than the head section (24A). Electrical connection of the metal frame (22) and the circuit board (5) is performed via the first and second copper foil pattern lands (51, 52) and solders (53, 54) that are provided to the copper foil pattern lands (51, 52).

Description

電子制御装置Electronic control unit
　本発明は電子制御装置に関し、特に金属部材と回路基板との接続構造に関する。 The present invention relates to an electronic control device, and more particularly to a connection structure between a metal member and a circuit board.
　従来、車両用計器など電子制御装置は、軽量化や電気的な絶縁などのために、合成樹脂材からなるモールドケースを用いる場合がある。このようなモールドケースを用いた際に、電子機器内部に金属部材を使用する必要性が生じた場合、金属部材が電気的に浮いた状態であると不要輻射や静電気により電子機器が誤作動を起こすような問題が考えられ好ましくない。そこで、このような問題を解決するために、電気的に浮いた金属部材を回路基板のグランドの信号に接続する方法をとっている。 Conventionally, an electronic control device such as a vehicle instrument may use a molded case made of a synthetic resin material for weight reduction or electrical insulation. When it is necessary to use a metal member inside the electronic device when using such a mold case, the electronic device may malfunction due to unnecessary radiation or static electricity if the metal member is in an electrically floating state. Problems that may occur are not preferable. Therefore, in order to solve such a problem, a method of connecting an electrically floating metal member to a signal on the ground of the circuit board is employed.
　例えば、特許文献１に開示されるものがあり、回路基板を導電性の金属フレーム（金属部材）に取付ける取付けねじ用の穴の周囲にソルダレジスト層によって互に分離して形成された複数個の小径の銅箔パターンランドを備え、上記回路基板の取付けねじ用の穴に取付けねじを装着することによって回路基板を金属フレームに取付けるとともに、上記銅箔パターンランドを介して回路基板を金属フレームに設置するように構成されるものが開示されている。 For example, there is one disclosed in Patent Document 1, and a plurality of pieces formed by being separated from each other by a solder resist layer around a hole for a mounting screw for attaching a circuit board to a conductive metal frame (metal member). A small-diameter copper foil pattern land is provided, and the circuit board is mounted on the metal frame by mounting the mounting screw in the hole for the circuit board mounting screw, and the circuit board is installed on the metal frame via the copper foil pattern land. What is configured to be disclosed is disclosed.
実開平１－１２０３８５号公報Japanese Utility Model Publication No. 1-120385
　しかしながら、これら回路基板を備えた電子制御装置は、該金属フレームに取付ける取付けねじ用の穴の周囲、例えば、取付けねじヘッドの外周に対応する位置に複数個の小径の銅箔パターンランドを形成し、この銅箔パターンランドに半田を設け、回路基板と金属フレームとを該取付けねじで締め付けた場合、回路基板と金属フレームとの電気的な接続を行うことができるものの、取付けねじの締め付けトルクによって、小径の銅箔パターンランド上の半田にクラックが生じることがあり、その結果、銅箔パターンランドと金属フレームの電気的接続が維持できなくなってしまう虞があった。 However, the electronic control device equipped with these circuit boards forms a plurality of small-diameter copper foil pattern lands around a hole for a mounting screw attached to the metal frame, for example, at a position corresponding to the outer periphery of the mounting screw head. When solder is provided on the copper foil pattern land and the circuit board and the metal frame are tightened with the mounting screws, the circuit board and the metal frame can be electrically connected, but depending on the tightening torque of the mounting screws. Cracks may occur in the solder on the small-diameter copper foil pattern land, and as a result, the electrical connection between the copper foil pattern land and the metal frame may not be maintained.
　そこで本発明の目的は、上述した課題に着目してなされ、金属部材を回路基板に取付けねじを用いて固定する際、金属部材と回路基板との電気的接続信頼性を向上する電子制御装置を提供することにある。 Accordingly, an object of the present invention is made by paying attention to the above-described problems, and an electronic control device that improves the reliability of electrical connection between a metal member and a circuit board when the metal member is fixed to the circuit board using a mounting screw. It is to provide.
　本発明の電子制御装置は、導電性の金属部材と、この金属部材を実装するとともに、前記金属部材と電気的に接続する回路基板と、前記金属部材と前記回路基板とを接続する取付けねじと、を備えた電子制御装置であって、前記回路基板には、前記取付けねじの装着用の孔部と、前記金属部材との対向面で、かつ前記孔部周囲において前記取付けねじの頭部よりも径小な位置に形成される複数の第１の銅箔パターンランドと、前記金属部材との対向面で、かつ前記孔部周囲において前記頭部よりも径大な位置に形成される複数の第２の銅箔パターンランドと、を設け、前記金属部材と前記回路基板との電気的な接続が、前記第１，第２の銅箔パターンランド及びこの銅箔パターンランドに設けられる半田を介して行われることを特徴とする。 An electronic control device of the present invention includes a conductive metal member, a circuit board that mounts the metal member and is electrically connected to the metal member, and a mounting screw that connects the metal member and the circuit board. The circuit board is provided with a hole for mounting the mounting screw, a surface facing the metal member, and around the hole from the head of the mounting screw. A plurality of first copper foil pattern lands formed at a position having a small diameter, and a plurality of surfaces formed on the surface facing the metal member and at a position larger in diameter than the head around the hole. A second copper foil pattern land is provided, and electrical connection between the metal member and the circuit board is performed via the first and second copper foil pattern lands and solder provided on the copper foil pattern land. It is characterized by being done
　また、前記第１の銅箔パターンランドは、前記孔部から同じ距離に複数形成されることを特徴とする。 Further, a plurality of the first copper foil pattern lands are formed at the same distance from the hole.
　また、前記第２の銅箔パターンランドは、前記孔部から同じ距離に複数形成されることを特徴とする。 Further, a plurality of the second copper foil pattern lands are formed at the same distance from the hole.
　本発明は、電子制御装置に関して、金属部材を回路基板に取付けねじを用いて固定する際、金属部材と回路基板との電気的接続信頼性を向上できる。 The present invention can improve the reliability of electrical connection between the metal member and the circuit board when the metal member is fixed to the circuit board using a mounting screw with respect to the electronic control device.
本発明の実施の形態における車両用計器の表示例を示す図。The figure which shows the example of a display of the meter for vehicles in embodiment of this invention. 同上実施の形態における車両用表示装置の断面を示す図。The figure which shows the cross section of the display apparatus for vehicles in embodiment same as the above. 同上実施の形態における車両用表示装置の要部の断面を示す図。The figure which shows the cross section of the principal part of the display apparatus for vehicles in embodiment same as the above. 同上実施の形態における回路基板を示す図。The figure which shows the circuit board in embodiment same as the above.
　以下、本発明の実施の形態を図に従って説明する。なお、以下の説明は、本発明を車両用計器に適用した実施例を示すものである。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the following description shows the Example which applied this invention to the meter for vehicles.
　図１は、車両用計器の表示例を示す図であり、図２は、その断面を示す。 FIG. 1 is a view showing a display example of a vehicle instrument, and FIG. 2 shows a cross section thereof.
　車両用計器は、指針表示部１と、画像表示部２と、方向指示器の状態や、前照灯のハイビーム、変速機のギアポジション、各種警告灯の表示など各種インジケータ３とを備えた複合計器であり、図２の断面図に示すように、ハウジング４内に、回路基板５と、この回路基板５に制御手段６や、バックライト７、外部接続用コネクタ８などが実装されている。 The vehicle instrument is a composite equipped with a pointer display unit 1, an image display unit 2, and various indicators 3 such as a direction indicator, a high beam of a headlamp, a gear position of a transmission, and various warning lights. As shown in the sectional view of FIG. 2, a circuit board 5 and a control means 6, a backlight 7, an external connection connector 8, and the like are mounted on the circuit board 5 in the housing 4.
　指針表示部１は、回路基板５に実装されたムーブメント（モータ）１１を駆動源にして回動する指針１２と、この指針１２の指示対象となる数値や目盛りからなる指標部１３が印刷された表示板１４とからなる。なお、指針表示部１は、バックライト７によって指標部１３や指針１２が照明可能に設けられる。この場合、指針表示部１は、外部通信用コネクタ８を介して入力される車速情報と、制御手段６による演算処理や駆動命令によって、ムーブメント１１が作動し、指針１２による指標部１３の指示位置によって、車両の走行速度値を表示することができる。 The pointer display unit 1 is printed with a pointer 12 that rotates using a movement (motor) 11 mounted on the circuit board 5 as a drive source, and an indicator unit 13 that includes numerical values and scales to be indicated by the pointer 12. It consists of a display board 14. The pointer display unit 1 is provided so that the indicator unit 13 and the pointer 12 can be illuminated by the backlight 7. In this case, the pointer display unit 1 operates the movement 11 according to the vehicle speed information input via the external communication connector 8 and the arithmetic processing or drive command by the control means 6, and the indicated position of the indicator unit 13 by the pointer 12. Thus, the traveling speed value of the vehicle can be displayed.
　画像表示部２は、制御手段６による駆動制御によって、所望の計測値や警報などの車両情報を画像にて表示する表示パネル２１を設けている。この場合、表示パネル２１によって積算走行距離や燃費などの車両情報を表示する。なお、表示パネル２１は、画面切換え可能に構成され、車両情報の他にも、時刻や温度情報なども表示出力できる。 The image display unit 2 is provided with a display panel 21 that displays vehicle information such as desired measurement values and warnings as images by drive control by the control means 6. In this case, vehicle information such as the accumulated travel distance and fuel consumption is displayed on the display panel 21. The display panel 21 is configured to be able to switch screens, and can display and output time and temperature information in addition to vehicle information.
　また、表示パネル２１は、図示しない可撓性配線を介して回路基板５の制御手段６等に接続される。前記可撓性配線は、画像信号を表示パネル２１へ送信するための信号伝送線路としての役割を担う。なお、表示パネル２１は、液晶表示素子を用いたものを適用でき、バックライト用の光源とともに、導電性の金属フレーム（金属部材）２２を用いて保持される。また、表示パネル２１は、表示板１４と回路基板５との間に位置して、表示板１４の切り欠き開口部から表示領域が臨めるようにして設けられ、この場合、合成樹脂からなるスペーサ２３によって回路基板５との所定距離をおいて保持される。 The display panel 21 is connected to the control means 6 of the circuit board 5 through a flexible wiring (not shown). The flexible wiring plays a role as a signal transmission line for transmitting an image signal to the display panel 21. The display panel 21 may be one using a liquid crystal display element, and is held using a conductive metal frame (metal member) 22 together with a light source for backlight. The display panel 21 is provided between the display board 14 and the circuit board 5 so that the display area can be exposed from the notch opening of the display board 14. In this case, the spacer 23 made of synthetic resin is provided. Is held at a predetermined distance from the circuit board 5.
　金属フレーム２２は、電気亜鉛めっき鋼板などを適用でき、表示パネル２１の表示領域外における表示パネル２１の端部を抑えて囲むような枠体形状であり、表示板１４と、表示パネル２１との間に介在するとともに、回路基板５へ実装することで、表示板１４側からの静電気を回路基板５の接地端子へ伝えることができるように、接地接続される。 An electrogalvanized steel plate or the like can be applied to the metal frame 22, and the frame shape is such that the end portion of the display panel 21 outside the display area of the display panel 21 is suppressed, and the display frame 14 and the display panel 21 are In addition to being interposed therebetween, by being mounted on the circuit board 5, it is grounded so that static electricity from the display board 14 side can be transmitted to the ground terminal of the circuit board 5.
　この金属フレーム２２と回路基板５の配線パターンとの接地接続構造については、図３に示すように、取付けねじ２４を用いてなされる。 The ground connection structure between the metal frame 22 and the wiring pattern of the circuit board 5 is made using a mounting screw 24 as shown in FIG.
　取付けねじ２４は、回路基板５と金属フレーム２２から延びて形成される脚部２５とを挟み込むようにスペーサ２３に螺着される。この際、回路基板５の銅箔パターンランド５１，５２に形成された半田５３，５４と、脚部２５とが電気的に接続される。 The mounting screw 24 is screwed to the spacer 23 so as to sandwich the circuit board 5 and the leg portion 25 formed extending from the metal frame 22. At this time, the solders 53 and 54 formed on the copper foil pattern lands 51 and 52 of the circuit board 5 and the legs 25 are electrically connected.
　なお、銅箔パターンランド５１，５２は、回路基板２５の取付けねじ２４が挿通するための孔部５５から近傍、特に、取付けねじ２４の頭部２４Ａの径よりも近くに形成され、スペーサ２３の接触面２３Ａと、頭部２４Ａとで脚部２５と半田５３を介して挟み込まれる第１の銅箔パターン５１が複数設けられ、また、回路基板５の孔部５５から頭部の径よりも遠くに形成され脚部２５に接する半田５４が形成される第２の銅箔パターン５２が複数設けられる。 The copper foil pattern lands 51 and 52 are formed in the vicinity of the hole 55 through which the mounting screw 24 of the circuit board 25 is inserted, in particular, closer to the diameter of the head 24A of the mounting screw 24. A plurality of first copper foil patterns 51 sandwiched between the contact surface 23A and the head portion 24A via the leg portion 25 and the solder 53 are provided, and further from the hole portion 55 of the circuit board 5 than the diameter of the head portion. A plurality of second copper foil patterns 52 formed with solder 54 in contact with the legs 25 are provided.
　銅箔パターンランド５１，５２は、この場合、図４に示すように、取付けねじ２４用の孔部５５の中心から同心円上で、点線にて示す頭部２４Ａの径５Ａよりも近くに複数設けられる第１の銅箔パターンランド５１と、この外側に同心円上に複数設けられる第２の銅箔パターンランド５２とからなり、小さな円形状にて形成される。従って、レジスト層５６を避けて銅箔パターンランド５１，５２上に形成される半田５３，５４の高さ寸法を一定にし易く、また複数設けることで、接触面積を確保することができる。 In this case, as shown in FIG. 4, a plurality of copper foil pattern lands 51 and 52 are provided concentrically from the center of the hole 55 for the mounting screw 24 and closer to the diameter 5A of the head 24A indicated by the dotted line. The first copper foil pattern land 51 and a plurality of second copper foil pattern lands 52 provided concentrically outside the first copper foil pattern land 51 are formed in a small circular shape. Therefore, it is easy to make the height dimensions of the solders 53 and 54 formed on the copper foil pattern lands 51 and 52, avoiding the resist layer 56, and by providing a plurality, it is possible to secure a contact area.
　ハウジング４は、表示パネル２１や、回路基板５、表示板１４などを保持して収納するもので、指針表示部１や画像表示部２、インジケータ３の表示を臨むことができるアクリルなどの透光性の合成樹脂からなる表側ケース４１と、各部品を保持するとともに、回路基板５などを覆い隠す遮光性の合成樹脂からなる裏側ケース４２とを設けている。この場合、ハウジング４は電気的絶縁部材からなる。 The housing 4 holds and accommodates the display panel 21, the circuit board 5, the display board 14, and the like, and is a translucent material such as acrylic that can display the pointer display unit 1, the image display unit 2, and the indicator 3. A front case 41 made of a synthetic resin and a back case 42 made of a light-shielding synthetic resin that holds each component and covers the circuit board 5 and the like are provided. In this case, the housing 4 is made of an electrically insulating member.
　回路基板５は、メータ用プリント基板として、銅箔パターンが印刷形成された硬質配線板であり、前述したムーブメント１１、バックライト７、表示パネル２１、制御手段６などの電子部品を実装している。この場合、回路基板５は、表示板１４に対して所定間隔離間して平行に設けられ、裏側ケース４２にビス止め固定される。 The circuit board 5 is a hard wiring board on which a copper foil pattern is printed and formed as a meter printed board, and mounted with electronic components such as the movement 11, the backlight 7, the display panel 21, and the control means 6 described above. . In this case, the circuit board 5 is provided in parallel with a predetermined distance from the display board 14 and fixed to the back case 42 with screws.
　制御手段６は、外部接続用コネクタ８や回路基板５の配線を介して入力される車両情報などに基づいて、上述したムーブメント１１や、表示パネル２１、各種インジケータ３用光源を駆動制御して表示出力させるもので、所定のプログラムを記憶部に格納したマイクロコンピュータを適用できる。 The control means 6 drives and controls the movement 11, the display panel 21, and the light sources for various indicators 3 described above based on the vehicle information input via the external connection connector 8 and the wiring of the circuit board 5. A microcomputer in which a predetermined program is stored in a storage unit can be applied.
　バックライト７は、指針１２、表示板１４の指標部１３などを透過照明するための発光ダイオードを適用でき、制御手段６による制御によって、駆動制御される。なお、制御手段６は、バックライト７に対してパルス幅変調制御を用いて調光でき、最適な輝度にて照明することができる。 The backlight 7 can be applied with a light emitting diode for transmitting and illuminating the pointer 12, the indicator portion 13 of the display board 14 and the like, and is driven and controlled by the control of the control means 6. The control means 6 can adjust the light using the pulse width modulation control for the backlight 7 and can illuminate with the optimum luminance.
　外部接続用コネクタ８は、ハウジング４の裏側ケース４２の穴を介して制御手段６と車体側の電子ユニットとを接続するハーネス８１と接続する接続部材である。これら外部接続用コネクタ８やハーネス８１を介して、車両用計器の電源接続や車両情報の受信（有線通信）がなされる。また、外部接続用コネクタ８は、接地信号線用の端子を含み、各電子部品だけでなく、金属フレーム２２や第１，第２銅箔パターンランドを車両用計器外に接地接続することができる。 The external connection connector 8 is a connection member that connects to the harness 81 that connects the control means 6 and the electronic unit on the vehicle body side through the hole in the back side case 42 of the housing 4. Via the external connection connector 8 and the harness 81, the power supply of the vehicle meter is connected and the vehicle information is received (wired communication). The external connection connector 8 includes a ground signal line terminal, and can connect not only each electronic component but also the metal frame 22 and the first and second copper foil pattern lands to the outside of the vehicle instrument. .
　以上の車両用計器によれば、車両情報を表示制御するための制御手段６を実装する回路基板５と、表示パネル２１の保持部材としてだけでなく接地接続可能な金属フレーム２２とを設けることができる。 According to the above vehicle instrument, the circuit board 5 on which the control means 6 for displaying and controlling the vehicle information is mounted, and the metal frame 22 that can be grounded as well as the holding member of the display panel 21 is provided. it can.
　かかる車両用計器は、導電性の金属フレーム２２と、この金属フレーム２２を実装するとともに、金属フレーム２２と電気的に接続するための配線パターンを設けた回路基板５と、金属フレーム２２と前記回路基板とを接続する取付けねじ２４と、を備えた電子制御装置であって、回路基板５には、取付けねじ２４の装着用の孔部５５と、金属フレーム２２との対向面で、かつ孔部５５周囲において取付けねじ２４の頭部２４Ａよりも径小な位置に形成される複数の第１の銅箔パターンランド５１と、金属フレーム２２との対向面で、かつ孔部５５周囲において頭部２４Ａよりも径大な位置に形成される複数の第２の銅箔パターンランド５２と、を設けて、金属フレーム２２と回路基板５との電気的な接続が、第１，第２の銅箔パターンランド５１，５２及びこの銅箔パターンランド５１，５２に設けられる半田５３，５４を介して行われる。 The vehicle instrument includes a conductive metal frame 22, a circuit board 5 on which the metal frame 22 is mounted and a wiring pattern for electrically connecting to the metal frame 22, and the metal frame 22 and the circuit. An electronic control device comprising a mounting screw for connecting to a board, wherein the circuit board 5 has a hole 55 for mounting the mounting screw 24 and a surface facing the metal frame 22 and a hole. The head 24 </ b> A is opposed to the plurality of first copper foil pattern lands 51 and the metal frame 22 at a position smaller in diameter than the head 24 </ b> A of the mounting screw 24 around the hole 55 and around the hole 55. A plurality of second copper foil pattern lands 52 formed at positions larger in diameter than the first and second copper foil patterns. La Takes place via a de 51, 52 and the solder 53, 54 provided on the copper foil pattern lands 51, 52.
　従って、金属フレーム２２と回路基板５とが取付けねじ２４によって接続される際に、スペーサ２３の接触面２３Ａと取付けねじ２４の頭部２４Ａとによって挟み込まれて第１の銅箔パターンランド５１上の半田５３が、変形しつつ接合される。また、回路基板５と金属フレーム２２の脚部２５とによって挟み込まれる第２の銅箔パターンランド５２の半田５４は、半田５３に比べて大きな圧力が加わらないため、半田５３よりも変形しないまま金属フレーム２２と回路基板５との電気的接続をなすことができる。 Therefore, when the metal frame 22 and the circuit board 5 are connected by the mounting screw 24, the metal frame 22 and the circuit board 5 are sandwiched between the contact surface 23A of the spacer 23 and the head portion 24A of the mounting screw 24, and thus on the first copper foil pattern land 51. The solder 53 is joined while being deformed. Further, since the solder 54 of the second copper foil pattern land 52 sandwiched between the circuit board 5 and the leg portion 25 of the metal frame 22 is not applied with a larger pressure than the solder 53, the solder 54 is not deformed more than the solder 53. Electrical connection between the frame 22 and the circuit board 5 can be made.
　そのため、半田５３，５４は、変形量の異なる少なくとも二種の状態となるため、振動をともなう環境にて長時間使用した場合にあっても、電気的接続状態を保持し、信頼性の高い接地構造になる。特に、取付けねじ２４から遠い位置に設けられ、取付けねじ２４による締め付けトルクの影響を受けにくい第２の銅箔パターンランド５２の半田５４は、加わるストレスが比較的小さいため、電気的接続の信頼性維持に期待でき有効である。 Therefore, since the solders 53 and 54 are in at least two states having different deformation amounts, the electrical connection state is maintained even when used for a long time in an environment with vibration, and the grounding is highly reliable. Become a structure. In particular, the solder 54 of the second copper foil pattern land 52 that is provided at a position far from the mounting screw 24 and is not easily affected by the tightening torque by the mounting screw 24 is applied with a relatively small stress. Expected to be effective and effective.
　また、第１の銅箔パターンランド５１は、孔部５５から同じ距離に複数形成され、同様に第２の銅箔パターンランド５２は、孔部５５から同じ距離に複数形成されることによって、取付けねじ２４による締め付けによって加わる半田５３，５４への圧力を均等に分散して、大きな変形が起こらないようにできる。また、接触面積を大きく確保できるため導電性を高めることができる。 In addition, a plurality of first copper foil pattern lands 51 are formed at the same distance from the hole 55, and similarly, a plurality of second copper foil pattern lands 52 are formed at the same distance from the hole 55, thereby being attached. The pressure applied to the solders 53 and 54 applied by tightening with the screws 24 can be evenly distributed so that no significant deformation occurs. Moreover, since a large contact area can be ensured, conductivity can be increased.
　なお、本発明の車両用表示装置を上述した実施の形態の構成にて例に挙げて説明したが、本発明はこれに限定されるものではなく、他の構成においても、本発明の要旨を逸脱しない範囲において種々の改良、並びに表示の変更が可能なことは勿論である。 The vehicle display device of the present invention has been described by way of example in the configuration of the embodiment described above, but the present invention is not limited to this, and the gist of the present invention is also achieved in other configurations. It goes without saying that various improvements and display changes can be made without departing from the scope.
　本発明は、電子制御装置に関して、例えば、自動車やオートバイ、あるいは農業機械や建設機械を備えた移動体に搭載される車両用計器やモニタとして好適である。 The present invention relates to an electronic control device, for example, suitable as a vehicle meter or a monitor mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.
１　指針表示部
２　画像表示部
２１　表示パネル
２２　金属フレーム（金属部材）
２３　スペーサ
２３Ａ　接触面
２４　取付けねじ
２４Ａ　頭部
３　インジケータ
４　ハウジング
５　回路基板
５１　第１の銅箔パターンランド
５２　第２の銅箔パターンランド
５３，５４　半田
５５　孔部
６　制御手段
７　バックライト
８　外部接続用コネクタ DESCRIPTION OF SYMBOLS 1 Pointer display part 2 Image display part 21 Display panel 22 Metal frame (metal member)
23 Spacer 23A Contact surface 24 Mounting screw 24A Head 3 Indicator 4 Housing 5 Circuit board 51 First copper foil pattern land 52 Second copper foil pattern land 53, 54 Solder 55 Hole 6 Control means 7 Backlight 8 External connection Connector

Claims (3)

  1. 　導電性の金属部材と、
    この金属部材を実装するとともに、前記金属部材と電気的に接続する回路基板と、
    前記金属部材と前記回路基板とを接続する取付けねじと、
    を備えた電子制御装置であって、
    前記回路基板には、
    前記取付けねじの装着用の孔部と、
    前記金属部材との対向面で、かつ前記孔部周囲において前記取付けねじの頭部よりも径小な位置に形成される複数の第１の銅箔パターンランドと、
    前記金属部材との対向面で、かつ前記孔部周囲において前記頭部よりも径大な位置に形成される複数の第２の銅箔パターンランドと、
    を設け、
    前記金属部材と前記回路基板との電気的な接続が、前記第１，第２の銅箔パターンランド及びこの銅箔パターンランドに設けられる半田を介して行われることを特徴とする電子制御装置。     A conductive metal member;
    While mounting this metal member, a circuit board electrically connected to the metal member;
    A mounting screw connecting the metal member and the circuit board;
    An electronic control device comprising:
    In the circuit board,
    A hole for mounting the mounting screw;
    A plurality of first copper foil pattern lands formed on the surface facing the metal member and at a position smaller in diameter than the head of the mounting screw around the hole;
    A plurality of second copper foil pattern lands formed on the surface facing the metal member and at a position larger in diameter than the head around the hole;
    Provided,
    An electronic control device characterized in that electrical connection between the metal member and the circuit board is performed via the first and second copper foil pattern lands and solder provided on the copper foil pattern lands.
  2. 　前記第１の銅箔パターンランドは、前記孔部から同じ距離に複数形成されることを特徴とする請求項１に記載の電子制御装置。 The electronic control device according to claim 1, wherein a plurality of the first copper foil pattern lands are formed at the same distance from the hole.
  3. 　前記第２の銅箔パターンランドは、前記孔部から同じ距離に複数形成されることを特徴とする請求項１または請求項２に記載の電子制御装置。 The electronic control device according to claim 1, wherein a plurality of the second copper foil pattern lands are formed at the same distance from the hole.
PCT/JP2013/083030 2012-12-12 2013-12-10 Electronic control device WO2014092063A1 (en)

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Citations (5)

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Publication number Priority date Publication date Assignee Title
JPH0357U (en) * 1989-05-18 1991-01-07
JPH0745973A (en) * 1993-07-27 1995-02-14 Fuji Electric Co Ltd Mounting structure of printed-wiring board
JPH08288672A (en) * 1995-04-13 1996-11-01 Denshi Giken:Kk Printed board for electronic components
JP2001332847A (en) * 2000-05-19 2001-11-30 Ricoh Co Ltd Printed wiring board, metallic part, and electric connection structure
JP2005327812A (en) * 2004-05-12 2005-11-24 Funai Electric Co Ltd Printed circuit board supporting structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357U (en) * 1989-05-18 1991-01-07
JPH0745973A (en) * 1993-07-27 1995-02-14 Fuji Electric Co Ltd Mounting structure of printed-wiring board
JPH08288672A (en) * 1995-04-13 1996-11-01 Denshi Giken:Kk Printed board for electronic components
JP2001332847A (en) * 2000-05-19 2001-11-30 Ricoh Co Ltd Printed wiring board, metallic part, and electric connection structure
JP2005327812A (en) * 2004-05-12 2005-11-24 Funai Electric Co Ltd Printed circuit board supporting structure

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