WO2014092063A1 - Dispositif de commande électronique - Google Patents

Dispositif de commande électronique 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
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
copper foil
foil pattern
hole
metal member
Prior art date
Application number
PCT/JP2013/083030
Other languages
English (en)
Japanese (ja)
Inventor
燕　哲也
Original Assignee
日本精機株式会社
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 日本精機株式会社 filed Critical 日本精機株式会社
Publication of WO2014092063A1 publication Critical patent/WO2014092063A1/fr

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Classifications

    • 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.

Landscapes

  • 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

L'invention porte sur un dispositif de commande électronique qui améliore la fiabilité d'une connexion électrique entre un élément métallique et une carte de circuits lorsqu'une vis de montage est utilisée pour fixer l'élément métallique sur la carte de circuits. La carte de circuits (5) comprend : un trou (55) pour monter une vis de montage (24) ; une pluralité de premiers méplats de motif de feuille de cuivre (51) qui sont formés autour du trou (55) à une position qui est sur la surface opposée d'un cadre métallique (22) et qui a un diamètre plus petit que la section tête (24A) de la vis de montage (24) ; et une pluralité de seconds méplats de motif de feuille de cuivre (52) qui sont formés autour du trou (55) à une position qui est sur la surface opposée du cadre métallique (22) et qui a un diamètre plus grand que la section tête (24A). Une connexion électrique du cadre métallique (22) et de la carte de circuits (5) est réalisée par l'intermédiaire des premiers et seconds méplats de motif de feuille de cuivre (51, 52) et de soudures (53, 54) qui sont agencées sur les méplats de motif de feuille de cuivre (51, 52).
PCT/JP2013/083030 2012-12-12 2013-12-10 Dispositif de commande électronique WO2014092063A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-271603 2012-12-12
JP2012271603A JP2014116554A (ja) 2012-12-12 2012-12-12 電子制御装置

Publications (1)

Publication Number Publication Date
WO2014092063A1 true WO2014092063A1 (fr) 2014-06-19

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ID=50934351

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/083030 WO2014092063A1 (fr) 2012-12-12 2013-12-10 Dispositif de commande électronique

Country Status (2)

Country Link
JP (1) JP2014116554A (fr)
WO (1) WO2014092063A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017005059A (ja) * 2015-06-08 2017-01-05 株式会社ジャパンディスプレイ 固定構造および固定方法
JP2022057762A (ja) 2020-09-30 2022-04-11 ヤマハ発動機株式会社 表示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357U (fr) * 1989-05-18 1991-01-07
JPH0745973A (ja) * 1993-07-27 1995-02-14 Fuji Electric Co Ltd プリント配線板の取付け構造
JPH08288672A (ja) * 1995-04-13 1996-11-01 Denshi Giken:Kk 電子部品用プリント基板
JP2001332847A (ja) * 2000-05-19 2001-11-30 Ricoh Co Ltd プリント配線板と金属部品との電気的接続構造
JP2005327812A (ja) * 2004-05-12 2005-11-24 Funai Electric Co Ltd プリント基板支持構造

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0357U (fr) * 1989-05-18 1991-01-07
JPH0745973A (ja) * 1993-07-27 1995-02-14 Fuji Electric Co Ltd プリント配線板の取付け構造
JPH08288672A (ja) * 1995-04-13 1996-11-01 Denshi Giken:Kk 電子部品用プリント基板
JP2001332847A (ja) * 2000-05-19 2001-11-30 Ricoh Co Ltd プリント配線板と金属部品との電気的接続構造
JP2005327812A (ja) * 2004-05-12 2005-11-24 Funai Electric Co Ltd プリント基板支持構造

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