JP5822182B2 - Vehicle display device - Google Patents

Vehicle display device Download PDF

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Publication number
JP5822182B2
JP5822182B2 JP2011198149A JP2011198149A JP5822182B2 JP 5822182 B2 JP5822182 B2 JP 5822182B2 JP 2011198149 A JP2011198149 A JP 2011198149A JP 2011198149 A JP2011198149 A JP 2011198149A JP 5822182 B2 JP5822182 B2 JP 5822182B2
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circuit board
antenna
circuit
board
display device
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JP2013060037A (en
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賢太 石澤
賢太 石澤
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Priority to JP2011198149A priority Critical patent/JP5822182B2/en
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    • 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
    • H05K1/00—Printed circuits
    • H05K1/02—Details
    • H05K1/14—Structural association of two or more printed circuits
    • H05K1/141—One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters
    • 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
    • B60K35/50—Instruments characterised by their means of attachment to or integration in the vehicle
    • 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
    • B60K35/85—Arrangements for transferring vehicle- or driver-related data
    • 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
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/40—Hardware adaptations for dashboards or instruments
    • B60K2360/42—Circuit board features
    • 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
    • B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
    • B60K2360/589—Wireless data transfers
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/04—Assemblies of printed circuits
    • H05K2201/042—Stacked spaced PCBs; Planar parts of folded flexible circuits having mounted components in between or spaced from each other
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10098—Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10227—Other objects, e.g. metallic pieces
    • H05K2201/10409—Screws
    • 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
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
    • H05K2201/2036—Permanent spacer or stand-off in a printed circuit or printed circuit assembly

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Instrument Panels (AREA)
  • Combinations Of Printed Boards (AREA)

Description

本発明は、車両に搭載され、車両情報を表示するための制御回路とともに無線通信用回路を含む車両用表示装置に関するものである。   The present invention relates to a vehicle display device that is mounted on a vehicle and includes a wireless communication circuit together with a control circuit for displaying vehicle information.

従来、本技術分野に掛かる発明として、少なくともスピードメータ、トリップ表示機及びこれらの駆動制御のためのメータ制御部（制御回路）が実装されるメータ用基板と、前記メータ用基板を収納するハウジングとを有した車両搭載メータ装置において、車両外部から送信機によって送信される電波信号をアンテナを介して受信し、当該車両のエンジンの始動制御若しくはドアの錠の開閉制御を行う電子制御装置の該アンテナを少なくとも前記メータ用基板又は前記ハウジングに設けたものが開示されている（例えば、特許文献１）。   Conventionally, as an invention according to this technical field, at least a speedometer, a trip display, and a meter board on which a meter control unit (control circuit) for driving control thereof is mounted, and a housing for housing the meter board, In an on-vehicle meter device having an antenna, the antenna of an electronic control device that receives a radio signal transmitted from the outside of the vehicle by a transmitter via an antenna and performs start control of the engine of the vehicle or control of opening / closing of a door lock Is provided on at least the meter substrate or the housing (for example, Patent Document 1).

本発明によれば、キーレスユニット等の電子制御装置のアンテナをメータ用基板又はハウジングに内蔵することによって、アンテナの配線位置を良好たらしめると共に、電子部品、回路基板、各種コネクタ部材等の使用量の低減を図ることができると共に、良好な受信感度を提供するものが知られている。   According to the present invention, an antenna of an electronic control device such as a keyless unit is built in a meter substrate or a housing, so that the wiring position of the antenna can be improved and the amount of use of electronic components, circuit boards, various connector members, etc. It is possible to reduce the noise and provide good reception sensitivity.

また、電波受信機がメータ用ハウジング内の位置にくるので、金属製車体による電磁遮蔽の影響を比較的受けにくいという特徴がある。   In addition, since the radio wave receiver is located at a position in the meter housing, there is a feature that it is relatively less susceptible to electromagnetic shielding by the metal vehicle body.

特開平８−２１６７３５号公報JP-A-8-216735

しかしながら、上記文献に掛かる技術においては、アンテナ部を少なくとも前記メータ用基板又は前記ハウジングに設けた構成であるため、アンテナ形状を立体構造とすることが困難であり、受信可能な到来波の偏波面が限られてしまうという問題点があった。   However, in the technique according to the above document, since the antenna portion is provided at least on the meter substrate or the housing, it is difficult to make the antenna shape into a three-dimensional structure. There was a problem that was limited.

また、アンテナ用の配線や回路構成によって、メータ用基板上の実装面積が狭くなってしまうために、基板面積が大型化してしまう問題があった。一方、アンテナ用の配線や回路構成をメータ用基板と別体にすることで、メータ用基板等による電磁遮蔽の影響を低減でき、アンテナ利得の向上を図ることができるが、部品が増加するだけでなく、それぞれの電気的な接続や、それらを固定する構造や組み付け作業が必要となるなど、改善の余地があった。   In addition, the mounting area on the meter substrate is reduced due to the antenna wiring and circuit configuration, which increases the substrate area. On the other hand, by separating the antenna wiring and circuit configuration from the meter substrate, the effect of electromagnetic shielding by the meter substrate can be reduced and the antenna gain can be improved, but only the number of parts increases. In addition, there was room for improvement, such as the need for electrical connection, a structure for fixing them, and assembly work.

そこで本発明の目的は、上述した課題に鑑みてなされたものであり、充分なアンテナ利得を簡易な構成にて実現できる無線通信機能を備えた車両用表示装置を提供することにある。   Accordingly, an object of the present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a vehicle display device having a wireless communication function capable of realizing a sufficient antenna gain with a simple configuration.

本発明の車両用表示装置は、
車両情報を表示制御するための制御回路を実装する第１の回路基板と、
前記第１の回路基板と離間して設けられ、無線通信用のアンテナ配線が形成されるとともに、前記アンテナ配線に接続された無線通信用回路を設ける第２の回路基板と、
前記第２の回路基板を前記第１の回路基板に固定かつ導通させるとともに、前記無線通信用回路と前記制御回路との間における信号経路として機能する導電手段と、を備えることを特徴とする。
The vehicle display device of the present invention includes:
A first circuit board on which a control circuit for displaying and controlling vehicle information is mounted;
A second circuit board that is provided apart from the first circuit board and has an antenna wiring for wireless communication, and a circuit for wireless communication connected to the antenna wiring;
The second circuit board is fixed and electrically connected to the first circuit board, and conductive means functioning as a signal path between the wireless communication circuit and the control circuit is provided .

また、前記導電手段は、前記アンテナ配線と電気的に接続し、無線通信用アンテナの一部として機能してなるアンテナ部を設けてなることを特徴とする。   Further, the conductive means is provided with an antenna portion that is electrically connected to the antenna wiring and functions as a part of a radio communication antenna.

また、前記第２の回路基板には、導電性被膜が施された複数の螺子穴が設けられ、前記導電手段を介して、前記第１の回路基板に電気的に接続され、前記第１の回路基板には、各導電手段を電気的に接続する配線を設けてなることを特徴とする。   The second circuit board is provided with a plurality of screw holes provided with a conductive coating, and is electrically connected to the first circuit board via the conductive means. The circuit board is provided with wiring for electrically connecting the conductive means.

また、前記第２の回路基板は、略矩形形状の硬質基板からなり、前記螺子穴を対角する角部近傍に設けてなることを特徴とする。   The second circuit board is made of a substantially rectangular hard board and is provided in the vicinity of a corner opposite to the screw hole.

本発明は、車両情報を表示する車両用表示装置に関し、充分なアンテナ利得を簡易な構成にて実現できる。   The present invention relates to a display device for a vehicle that displays vehicle information, and a sufficient antenna gain can be realized with a simple configuration.

本発明の実施の形態における車両用表示装置の断面図。Sectional drawing of the display apparatus for vehicles in embodiment of this invention. 同上実施の形態における通信用プリント基板を示す斜視図。The perspective view which shows the printed circuit board for communication 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、本発明を車載メータに適用した一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 one Example which applied this invention to the vehicle-mounted meter.

図１は、本発明の車両用表示装置の断面図を示す。車両用表示装置は、表示器１と、メータ用プリント基板（第１の回路基板）２と、通信用プリント基板（第２の回路基板）３と、固定手段（導電手段）４と、ハウジング５と、ケーブル６と、を備えている。また、図２は、メータ用プリント基板２に保持された通信用プリント基板３を示す斜視図である。   FIG. 1 shows a cross-sectional view of a vehicle display device of the present invention. The vehicle display device includes a display 1, a meter printed board (first circuit board) 2, a communication printed board (second circuit board) 3, a fixing means (conductive means) 4, and a housing 5. And a cable 6. FIG. 2 is a perspective view showing the communication printed circuit board 3 held on the meter printed circuit board 2.

表示器１は、メータ用プリント基板２に実装されたムーブメント（モータ）２１を駆動源にして回動する指針１１ａと、この指針の指示対象となる数値や目盛りからなる指標部が印刷された表示板１１ｂとからなる指針表示部１１と、バックライト２２によって照明可能に設けられる液晶表示パネル２３とを設けている。表示器１は、後述する制御回路２４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指示、または表示できるように設けられる。この場合、指針表示部１１によって車速を表示出力し、液晶表示パネル２３によって積算走行距離などの車両情報を表示する。なお、表示器１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、無線通信による入力情報の表示や無線通信状態なども表示出力できる。   The display 1 is a display in which a pointer 11a that rotates using a movement (motor) 21 mounted on a printed circuit board 2 for a meter as a driving source, and an indicator portion that includes numerical values and scales that are the targets of the pointer. A pointer display unit 11 including a plate 11b and a liquid crystal display panel 23 provided so as to be illuminable by a backlight 22 are provided. The display device 1 is provided so as to be able to instruct or display vehicle information such as desired measurement values and warnings by drive control by a control circuit 24 described later. In this case, the vehicle speed is displayed and output by the pointer display unit 11, and vehicle information such as the accumulated travel distance is displayed by the liquid crystal display panel 23. The display 1 is configured to be able to switch screens, and can display and output time and temperature information, input information display by wireless communication, wireless communication status, and the like in addition to vehicle information.

メータ用プリント基板２は、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２１、バックライト２２と、液晶表示パネル２３と、制御回路２４などの電子部品を実装している。制御回路２４は、ケーブル６やメータ用プリント基板２の配線を介して入力される車両情報や、通信用プリント基板３からの信号などに基づいて、表示器１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格納したマイクロコンピュータを適用できる。   The meter printed circuit board 2 is a hard wiring board on which a copper foil pattern is printed and mounted with electronic parts such as the movement 21, the backlight 22, the liquid crystal display panel 23, and the control circuit 24 described above. The control circuit 24 drives and controls the display 1 based on the vehicle information input via the cable 6 and the wiring of the meter printed board 2, the signal from the communication printed board 3, etc. Thus, a microcomputer storing a predetermined program can be applied.

通信用プリント基板３は、略矩形の硬質配線板を適用でき、銅箔からなり通信用プリント基板３の端辺付近に線状に設けられるアンテナ配線３１ａ，３１ｂと、複数の螺子穴３２と、電子部品を実装するとともに電気的に接続するための図示しない電極などが形成され、無線通信用回路（通信モジュール）３３や整合回路３４、記憶手段３５、電源回路３６などが実装されている。   The communication printed circuit board 3 can be applied with a substantially rectangular hard wiring board, which is made of copper foil and is provided in the vicinity of the edge of the communication printed circuit board 3 in a line shape, a plurality of screw holes 32, An electrode (not shown) for mounting and electronically connecting electronic components is formed, and a wireless communication circuit (communication module) 33, a matching circuit 34, a storage unit 35, a power supply circuit 36, and the like are mounted.

螺子穴３２は、後述する固定手段４に接する導電被膜が形成され、この場合、整合回路３４からの配線３４ａに接続している。無線通信用回路３３は、別途配線によってメータ用プリント基板２の制御回路２４に接続され、制御回路２４からの信号に基づいて電波信号を受信または送信する回路である。 整合回路３４は、アンテナ配線３１ａ，３１ｂ等のインピーダンスを整合させるための回路で、コンデンサやコイルを適用できる。記憶手段３５は、無線通信によって送信される情報や、受信信号の復号・照合に必要な情報を格納するＥＥＰＲＯＭ等の不揮発性メモリを適用でき、別途配線を介して制御回路２４と接続されている。電源回路３６は、通信用プリント基板３に実装された無線通信用回路３３などの電子部品に電源を供給する回路で、定電圧回路を適用できる。   The screw hole 32 is formed with a conductive film in contact with the fixing means 4 described later. In this case, the screw hole 32 is connected to the wiring 34 a from the matching circuit 34. The wireless communication circuit 33 is a circuit that is connected to the control circuit 24 of the meter printed circuit board 2 by separate wiring and receives or transmits a radio wave signal based on a signal from the control circuit 24. The matching circuit 34 is a circuit for matching the impedances of the antenna wirings 31a, 31b and the like, and a capacitor or a coil can be applied. The storage means 35 can be applied to a nonvolatile memory such as an EEPROM for storing information transmitted by wireless communication and information necessary for decoding / verifying received signals, and is connected to the control circuit 24 via a separate wiring. . The power supply circuit 36 is a circuit that supplies power to an electronic component such as the wireless communication circuit 33 mounted on the communication printed board 3, and a constant voltage circuit can be applied.

固定手段４は、メータ用プリント基板２と通信用プリント基板３とによって挟まれて各プリント基板２，３の実装面が平行で所定間隔離間するように保つ円柱状の金属スペーサ４１と、螺子穴３２及び金属スペーサ４１を挿通し、ナット４２との螺合によってメータ用プリント基板２と通信用プリント基板３とを固定保持する金属製のビス４３とを設けている。また、金属スペーサ４１やビス４３は、導電性であり螺子穴３２及び螺子穴３２付近の金属被膜と接して、メータ用プリント基板２と通信用プリント基板３との各所定配線に接続し導電可能に設けられる。   The fixing means 4 includes a cylindrical metal spacer 41 sandwiched between the meter printed board 2 and the communication printed board 3 so that the mounting surfaces of the printed boards 2 and 3 are parallel and spaced apart from each other, screw holes 32 and a metal spacer 41 are inserted, and a metal screw 43 for fixing and holding the meter printed board 2 and the communication printed board 3 by screwing with a nut 42 is provided. Further, the metal spacer 41 and the screw 43 are electrically conductive and are in contact with the screw hole 32 and the metal coating in the vicinity of the screw hole 32 to be connected to the predetermined wirings of the meter printed board 2 and the communication printed board 3 to be conductive. Provided.

なお、ナット４２に螺合されるビス４３と金属スペーサ４１を設けて導電しつつ各プリント基板２，３を接続保持するものを示したが、ビスと金属スペーサとが一体に設けられるものであってもよいし、ナットへの螺合でなくハウジングなどの筐体や車両用表示装置内の別部材に螺合させて、各プリント基板２，３の固定を兼ねることもできる。   The screw 43 and the metal spacer 41 that are screwed into the nut 42 are provided to connect and hold the printed circuit boards 2 and 3 while being electrically conductive. However, the screw and the metal spacer are integrally provided. Alternatively, the printed circuit boards 2 and 3 may be fixed by screwing to a housing such as a housing or another member in the vehicle display device instead of screwing to the nut.

この場合、螺子穴３２と固定手段４とは、通信用プリント基板３の角部付近に４つ設けられ、そのうち対角関係にある２つの固定手段４は、アンテナ配線３１ａ，３１ｂと接続されるとともに、メータ用プリント基板２の接地用の配線パターンに同調容量２５を介して接続するアンテナ部４ａとしてアンテナとして作用する。同調容量２５は、アンテナインピーダンスを所望の数値（例えば、５０オーム）に整合させ易くする役割を担う。   In this case, four screw holes 32 and fixing means 4 are provided in the vicinity of the corner of the printed circuit board 3 for communication, and the two fixing means 4 that are diagonally connected are connected to the antenna wirings 31a and 31b. At the same time, it acts as an antenna as the antenna portion 4a connected to the grounding wiring pattern of the meter printed board 2 via the tuning capacitor 25. The tuning capacitor 25 serves to facilitate matching the antenna impedance to a desired value (eg, 50 ohms).

また、図２に示すように、電波を送受信するためのアンテナ機能を、アンテナ配線３１ａ，３１ｂ、アンテナ部４ａ、メータ用プリント基板２の接地用の配線パターン（図示しない）によって、ループ状に接続して設けられ、配線３４ａや整合回路３４等を介して、無線通信用回路３３に接続される。従って、基板面に垂直なアンテナ部４ａ部分によって、立体的でアンテナ利得の高い構成を容易に得ることができる。   Further, as shown in FIG. 2, the antenna function for transmitting and receiving radio waves is connected in a loop by antenna wirings 31a and 31b, the antenna unit 4a, and a grounding wiring pattern (not shown) of the meter printed board 2. And is connected to the wireless communication circuit 33 via the wiring 34a, the matching circuit 34, and the like. Therefore, a three-dimensional and high antenna gain configuration can be easily obtained by the antenna portion 4a portion perpendicular to the substrate surface.

また、アンテナ部４ａとして用いない、固定手段４にあっては、通信用プリント基板３の図示しないグラウンドプレーンに接続することによって、通信用プリント基板３の各角部に存在する螺子穴３２のうち対角関係にあるものをグラウンドの低インピーダンス用途として使用することが可能となる。従って、通信用プリント基板３に実装された各種電子部品のグラウンドと、メータ用プリント基板２のグラウンド間のインピーダンスを小さくできるため、コモンモードノイズの発生を抑制することができる。 そして、車両用表示装置から発生する不要輻射の抑制に寄与することができる。   Further, in the fixing means 4 that is not used as the antenna portion 4a, by connecting to a ground plane (not shown) of the communication printed circuit board 3, the screw holes 32 that exist at each corner of the communication printed circuit board 3 are connected. Those in a diagonal relationship can be used for ground low impedance applications. Therefore, since the impedance between the grounds of various electronic components mounted on the communication printed board 3 and the ground of the meter printed board 2 can be reduced, the occurrence of common mode noise can be suppressed. And it can contribute to suppression of the unnecessary radiation generate | occur | produced from the display apparatus for vehicles.

ハウジング５は、表示器１や、メータ用プリント基板２、通信用プリント基板３、固定手段４などを保持して収納するもので、表示器１の表示を臨むことができる透光性の合成樹脂からなるケース５１と、プリント基板２，３などを覆い隠す遮光性の合成樹脂からなるケース５２とを設けている。   The housing 5 holds and stores the display 1, the meter printed board 2, the communication printed board 3, the fixing means 4, and the like, and is a translucent synthetic resin that can display the display 1. And a case 52 made of a light-shielding synthetic resin that covers the printed circuit boards 2 and 3 and the like.

ケーブル６は、ケース５２の穴を介して制御回路２４と車体側の電子ユニットとを接続するハーネスであり、メータ用プリント基板２とコネクタ６１を介して接続されている。   The cable 6 is a harness that connects the control circuit 24 and the electronic unit on the vehicle body side through the hole of the case 52, and is connected to the meter printed board 2 through the connector 61.

斯かる車両用表示装置は、車両情報を表示制御するための制御回路２４を実装するメータ用プリント基板２と、メータ用プリント基板２と離間して設けられ、無線通信用のアンテナ配線３１ａ，３１ｂを形成してなる通信用プリント基板３と、通信用プリント基板３をメータ用プリント基板２に固定かつ導通させる固定手段４と、を設けてなる。   Such a vehicle display device is provided separately from the meter printed circuit board 2 on which the control circuit 24 for controlling display of vehicle information is mounted, and the meter printed circuit board 2, and antenna wirings 31a and 31b for wireless communication. And a fixing means 4 for fixing and conducting the communication printed circuit board 3 to the meter printed circuit board 2.

従って、アンテナ用の配線や回路構成によって、アンテナ用の配線や回路構成をメータ用基板と別体にすることで、メータ用基板等による放射抵抗低下の影響を低減でき、アンテナ利得の向上を図るとともに、固定手段と導電手段を兼ねることによって、部品が増加を抑制でき、また、それぞれの電気的な接続や、それらを固定する構造や組み付け作業が容易になるため、充分なアンテナ利得を簡易な構成にて実現できる無線通信機能を備えた車両用表示装置となる。   Therefore, by separating the antenna wiring and circuit configuration from the meter substrate depending on the antenna wiring and circuit configuration, it is possible to reduce the influence of radiation resistance reduction due to the meter substrate and the like, and to improve the antenna gain. At the same time, by combining the fixing means and the conductive means, the increase in the number of parts can be suppressed, and the electrical connection, the structure for fixing them, and the assembling work are facilitated. The vehicle display device has a wireless communication function that can be realized by the configuration.

また、固定手段４は、アンテナ配線３１ａ，３１ｂと電気的に接続し、無線通信用アンテナの一部として機能してなるアンテナ部４ａを設けてなることによって、アンテナ形状をメータ用プリント基板２に対して立体構造とさせつつも、既存のメータ構成部品でアンテナ部材を構成し、低コスト化を図ることができる。   The fixing means 4 is electrically connected to the antenna wirings 31a and 31b, and is provided with an antenna portion 4a that functions as a part of the antenna for wireless communication. On the other hand, while using a three-dimensional structure, it is possible to reduce the cost by configuring the antenna member with existing meter components.

また、車両用表示装置に無線通信の機能が必要ないときには、通信用プリント基板３を組み付けずに他の構成要素を汎用できるため、車両の装備品の違いに対応した汎用性の高い車両用表示装置となる。   In addition, when the vehicle display device does not require a wireless communication function, other components can be used for general purposes without assembling the communication printed circuit board 3, so that a highly versatile vehicle display corresponding to differences in vehicle equipment can be used. It becomes a device.

また、プリント配線板上の導線パターンと、プリント配線板を固定支持するための導電手段をループアンテナとして用いており、既存の電子部品を活用しつつ、コストを抑えてアンテナを構成することができる。また、導電性手段間の電気的な接続方法を定めることにより、アンテナ用途としての使用をしつつ、不要輻射の抑制をも考慮した車両用表示装置を構成することができ、好適である。   In addition, the conductor pattern on the printed wiring board and the conductive means for fixing and supporting the printed wiring board are used as a loop antenna, and the antenna can be configured with reduced costs while utilizing existing electronic components. . In addition, by defining an electrical connection method between the conductive means, it is possible to configure a vehicle display device that can be used as an antenna and also considers suppression of unnecessary radiation.

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。例えば、固定部材としてビス４３を用いた例を説明したが、金属フックなどの係止構造によるものであってもよいし、係止部分とビス止め部分を併用するものであっても、上述した実施の形態と同様の効果を得ることができる。 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. For example, the example in which the screw 43 is used as the fixing member has been described, but it may be a locking structure such as a metal hook, or the locking portion and the screw fixing portion may be used together. The same effect as the embodiment can be obtained.

また、ここでは、通信用プリント基板３として、長方形や曲線形状などであっても、導線としてのパターン長を確保できるものであれば、同様の効果を奏する。また、固定手段４は、通信用プリント基板の大きさや形状に応じて４本以上あってもよいし、アンテナ部４ａやグラウンド接続用の導電機能を例にあげて説明したが、アンテナ部４ａの他に、無線通信用回路３３と制御回路２４との間における信号経路や接地経路として機能するものを設けることもでき、耐振動や組み付け性で有利である。   Here, even if the communication printed circuit board 3 has a rectangular shape or a curved shape, the same effect can be obtained as long as the pattern length as a conducting wire can be secured. Further, there may be four or more fixing means 4 depending on the size and shape of the printed circuit board for communication, and the antenna unit 4a and the conductive function for ground connection have been described as examples. In addition, a circuit functioning as a signal path or a ground path between the radio communication circuit 33 and the control circuit 24 can be provided, which is advantageous in terms of vibration resistance and assembly.

また、通信用プリント基板３のアンテナ配線において、螺子穴等を迂回する場合、スルーホールを用いて、他の基板面を介したアンテナ配線構造を適宜設定することもでき、上述と同様の効果を得ることができる。   In addition, in the antenna wiring of the printed circuit board 3 for communication, when a screw hole or the like is bypassed, an antenna wiring structure through another board surface can be appropriately set using a through hole, and the same effect as described above can be obtained. Can be obtained.

本発明は、車両に搭載して各種車両情報を表示する車両用表示装置に関して、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表示装置として適用できる。   The present invention can be applied to a display device for a vehicle that is mounted on a vehicle and displays various types of vehicle information, for example, as a display device that is mounted on a moving body including an automobile, a motorcycle, an agricultural machine, or a construction machine.

１ 表示器
２ メータ用プリント基板（第１の回路基板）
２４ 制御回路
２５ 同調容量
３ 通信用プリント基板（第２の回路基板）
３１ アンテナ配線
３２ 螺子穴
３３ 無線通信用回路
３４ 整合回路
３５ 記憶手段
３６ 電源回路
４ 固定手段（導電手段）
４１ 金属スペーサ
４３ ビス
４ａ アンテナ部
５ ハウジング
６ ケーブル 1 Display 2 Meter printed circuit board (first circuit board)
24 control circuit 25 tuning capacity 3 communication printed circuit board (second circuit board)
31 Antenna wiring 32 Screw hole 33 Wireless communication circuit 34 Matching circuit 35 Memory means 36 Power supply circuit 4 Fixing means (conductive means)
41 Metal spacer 43 Screw 4a Antenna part 5 Housing 6 Cable

Claims (4)

車両情報を表示制御するための制御回路を実装する第１の回路基板と、
前記第１の回路基板と離間して設けられ、無線通信用のアンテナ配線が形成されるとともに、前記アンテナ配線に接続された無線通信用回路を設ける第２の回路基板と、
前記第２の回路基板を前記第１の回路基板に固定かつ導通させるとともに、前記無線通信用回路と前記制御回路との間における信号経路として機能する導電手段と、を備えることを特徴とする車両用表示装置。 A first circuit board on which a control circuit for displaying and controlling vehicle information is mounted;
A second circuit board that is provided apart from the first circuit board and has an antenna wiring for wireless communication, and a circuit for wireless communication connected to the antenna wiring;
A vehicle comprising: a conductive means that fixes and conducts the second circuit board to the first circuit board and functions as a signal path between the wireless communication circuit and the control circuit. Display device. 前記導電手段は、前記アンテナ配線と電気的に接続し、無線通信用アンテナの一部として機能してなるアンテナ部を設けてなることを特徴とする請求項１に記載の車両用表示装置。   The vehicle display device according to claim 1, wherein the conductive means is provided with an antenna portion that is electrically connected to the antenna wiring and functions as a part of an antenna for wireless communication. 前記第２の回路基板には、導電性被膜が施された複数の螺子穴が設けられ、前記導電手段を介して、前記第１の回路基板に電気的に接続され、
前記第１の回路基板には、各導電手段を電気的に接続する配線を設けてなることを特徴とする請求項１または請求項２に記載の車両用表示装置。 The second circuit board is provided with a plurality of screw holes provided with a conductive coating, and is electrically connected to the first circuit board through the conductive means,
3. The vehicle display device according to claim 1, wherein the first circuit board is provided with a wiring for electrically connecting the conductive means. 4. 前記第２の回路基板は、略矩形形状の硬質基板からなり、
前記螺子穴を対角する角部近傍に設けてなることを特徴とする請求項３に記載の車両用表示装置。 The second circuit board is a substantially rectangular hard board,
The vehicle display device according to claim 3, wherein the screw hole is provided in the vicinity of a corner portion where the screw holes are diagonal.
JP2011198149A 2011-09-12 2011-09-12 Vehicle display device Expired - Fee Related JP5822182B2 (en)

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