JP2018107589A - On-vehicle wireless receiving device - Google Patents

On-vehicle wireless receiving device Download PDF

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JP2018107589A
JP2018107589A JP2016251119A JP2016251119A JP2018107589A JP 2018107589 A JP2018107589 A JP 2018107589A JP 2016251119 A JP2016251119 A JP 2016251119A JP 2016251119 A JP2016251119 A JP 2016251119A JP 2018107589 A JP2018107589 A JP 2018107589A
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circuit board
printed circuit
sub
receiving
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JP6914583B2 (en
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中野　英茂
Hideshige Nakano
英茂 中野
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Daihatsu Motor Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide an on-vehicle wireless receiving device that can easily adjust reception sensitivity by a simple and low-cost configuration, and that has an antenna structure capable of preventing reduction in reception sensitivity.SOLUTION: In a device comprising a main printed board 2 and a sub printed board 3, a reception antenna pattern 5 to be connected with a main side reception circuit 2a is formed on the sub printed board 3, and a plurality of terminal bodies 6 are erected in a direction orthogonal to a principal surface of the sub printed board 3 and connected with the antenna pattern 5. Any one terminal body 6 is connected with the reception circuit 2a on the main printed board 2.SELECTED DRAWING: Figure 2

Description

本発明は、外部機器からの無線信号を受信する車載用無線受信装置に関する。   The present invention relates to an in-vehicle wireless reception device that receives a wireless signal from an external device.

従来、ドライバが所持するリモコンキーと車両に搭載されるキーレスエントリー用の無線受信装置との間でコード通信を行い、リモコンキーに設けられたロック釦、アンロック釦それぞれの操作によりドアをロック、アンロックすることが提案されている。   Conventionally, code communication is performed between a remote control key possessed by a driver and a wireless receiver for keyless entry mounted on a vehicle, and a door is locked by operating a lock button and an unlock button provided on the remote control key. It has been proposed to unlock.

上記した特許文献１に記載の無線受信装置は、例えば図３に示すように構成されている。すなわち、メインプリント基板５１の一側辺に沿って平板形状の受信モジュール基板５２が直方向に立設され、この受信モジュール基板５２の垂直方向の一面５２ａに、ダイポール型のパターンアンテナ５３ａ，５３ｂが形成されている。なお、図３中の５４はメインプリント基板５１上に実装されたワイヤハーネス接続用のコネクタ、５５はメインプリント基板５１上に実装されコネクタ５４と受信モジュール基板５２の間に配設されたマイコンチップからなる受信制御部である。   The wireless receiving device described in Patent Document 1 is configured as shown in FIG. 3, for example. That is, a flat receiving module board 52 is erected in a straight direction along one side of the main printed circuit board 51, and dipole pattern antennas 53a and 53b are formed on one vertical surface 52a of the receiving module board 52. Is formed. 3, 54 is a connector for connecting a wire harness mounted on the main printed circuit board 51, and 55 is a microcomputer chip mounted on the main printed circuit board 51 and disposed between the connector 54 and the receiving module substrate 52. It is a reception control part which consists of.

特開２００７−６８１０６号公報（段落００１８〜００２３よび図１、図２参照）JP 2007-68106 A (refer to paragraphs 0018 to 0023 and FIGS. 1 and 2)

しかし、上記した特許文献１に記載の構成では、パターンアンテナ５３ａ，５３ｂを形成するための専用の受信モジュール基板５２をメインプリント基板５１とは別に準備し、受信モジュール基板５２をメインプリント基板５１に立設させなければならず、構成が複雑で高コストになるという問題がある。一方、メインプリント基板５１に平面状のパターンアンテナを直接形成することも考えられるが、立体構成のアンテナに比べて受信感度が悪く、しかもメインプリント基板５１のグランドラインとパターンアンテナとが近接するため、パターンアンテナがノイズ源となって受信制御部がノイズの影響を受け易くなるという新たな問題が生じる。   However, in the configuration described in Patent Document 1 described above, a dedicated receiving module substrate 52 for forming the pattern antennas 53a and 53b is prepared separately from the main printed circuit board 51, and the receiving module substrate 52 is attached to the main printed circuit board 51. There is a problem that the structure is complicated and expensive. On the other hand, it is conceivable to form a planar pattern antenna directly on the main printed circuit board 51, but the reception sensitivity is lower than that of a three-dimensional antenna, and the ground line of the main printed circuit board 51 and the pattern antenna are close to each other. A new problem arises that the pattern antenna becomes a noise source and the reception control unit is easily affected by noise.

本発明は、簡単かつ安価な構成で、受信感度の調整を簡単に行うことが可能で、受信感度の低下を防止可能なアンテナ構造を有する車載用無線受信装置を提供できるようにすることを目的とする。   An object of the present invention is to provide an in-vehicle wireless reception apparatus having an antenna structure that can easily adjust reception sensitivity and can prevent a decrease in reception sensitivity with a simple and inexpensive configuration. And

上記した目的を達成するために、本発明の車載用無線受信装置は、メインプリント基板およびサブプリント基板を備え、外部機器からの無線信号を受信する車載用無線受信装置において、前記メインプリント基板および前記サブプリント基板がケース内に収容され、前記メインプリント基板には、前記無線信号を受信する受信回路と、前記受信回路により受信された前記無線信号に応じた制御を行う制御回路とが配設され、前記サブプリント基板には、前記受信回路に接続される受信用のアンテナパターンが形成され、前記サブプリント基板の主面に直交する方向に複数の端子体が立設されて前記アンテナパターンに接続されいずれかの前記端子体が前記受信回路に接続されていることを特徴としている。   In order to achieve the above-described object, a vehicle-mounted wireless reception device of the present invention includes a main printed circuit board and a sub-printed circuit board. In the vehicle-mounted wireless reception device that receives a wireless signal from an external device, the main printed circuit board and The sub printed circuit board is accommodated in a case, and the main printed circuit board includes a receiving circuit that receives the wireless signal and a control circuit that performs control according to the wireless signal received by the receiving circuit. A receiving antenna pattern connected to the receiving circuit is formed on the sub printed circuit board, and a plurality of terminal bodies are erected in a direction perpendicular to the main surface of the sub printed circuit board to form the antenna pattern; Any one of the connected terminal bodies is connected to the receiving circuit.

本発明によれば、メインプリント基板およびサブプリント基板を備える装置において、サブプリント基板に受信回路に接続される受信用のアンテナパターンを形成し、複数の端子体をアンテナパターンに接続するため、もともと装置が備えるサブプリント基板を利用して簡単に立体構造のアンテナを形成することができ、従来の受信モジュール基板のような別部材を準備する必要がなく、簡単かつ安価に立体構造のアンテナを実現することができる。   According to the present invention, in an apparatus including a main printed circuit board and a sub printed circuit board, a receiving antenna pattern connected to a receiving circuit is formed on the sub printed circuit board, and a plurality of terminal bodies are connected to the antenna pattern. A three-dimensional antenna can be easily formed by using the sub-print board provided in the device, and it is not necessary to prepare a separate member like a conventional receiving module substrate, and a three-dimensional antenna is realized easily and inexpensively. can do.

また、サブプリント基板の主面に直交する方向に複数の端子体が立設されてアンテナパターンに接続され、いずれかの端子体がメインプリント基板の受信回路に接続される構造であるため、端子体の個数を増減することで容易に受信感度を調整することができ、しかもアンテナパターンおよび端子体による立体構造によって、従来の平面状のパターンアンテナのような受信感度の低下を防止することができる。このとき、端子体として、例えばコネクタの未使用の端子ピンを利用するのが好ましい。   In addition, since a plurality of terminal bodies are erected in a direction orthogonal to the main surface of the sub printed circuit board and connected to the antenna pattern, and any one of the terminal bodies is connected to the receiving circuit of the main printed circuit board, the terminal Receiving sensitivity can be easily adjusted by increasing / decreasing the number of bodies, and a decrease in receiving sensitivity like a conventional planar pattern antenna can be prevented by the three-dimensional structure of the antenna pattern and terminal body. . At this time, it is preferable to use, for example, unused terminal pins of the connector as the terminal body.

本発明に係る車載用無線受信装置の一実施形態の分解斜視図である。1 is an exploded perspective view of an embodiment of an in-vehicle wireless receiver according to the present invention. 図１の一部の斜視図である。It is a one part perspective view of FIG. 従来例の斜視図である。It is a perspective view of a prior art example.

本発明に係る車載用無線受信装置をキーレスエントリー用のＲＦ受信装置に適用した一実施形態について、図１および図２を参照して詳細に説明する。   An embodiment in which the in-vehicle wireless receiver according to the present invention is applied to an RF receiver for keyless entry will be described in detail with reference to FIGS. 1 and 2.

図１、図２に示すように、第１ケース体１ａおよび第２ケース体１ｂに２分割されたケース１に、メインプリント基板２およびサブプリント基板３が重ねられた状態で収容される。メインプリント基板２には、図１では図示省略されたリモコンキーに内蔵の通信手段との間で無線によるコード通信を行う図２の受信回路２ａのほか、本発明の制御回路である図２のキーレスエントリー用のマイクロコンピュータ構成のボデーＥＣＵ２ｂ、および、図１に示す複数のコネクタ２ｃが実装され、サブプリント基板３には、リレーブロックを構成する複数のリレー（図示せず）およびコネクタ３ａが実装されている。このように、メインプリント基板２およびサブプリント基板３をケース１内に収容することにより、ボデーＥＣＵ２ｂを統合した統合型のリレーブロックが車両に搭載される。   As shown in FIGS. 1 and 2, the main printed circuit board 2 and the sub printed circuit board 3 are accommodated in the case 1 divided into the first case body 1a and the second case body 1b in an overlapped manner. In addition to the receiving circuit 2a of FIG. 2 that performs wireless code communication with the communication means built in the remote control key (not shown in FIG. 1), the main printed circuit board 2 is the control circuit of FIG. A body ECU 2b having a microcomputer configuration for keyless entry and a plurality of connectors 2c shown in FIG. 1 are mounted, and a plurality of relays (not shown) and connectors 3a constituting a relay block are mounted on the sub-printed circuit board 3. Has been. Thus, by accommodating the main printed circuit board 2 and the sub printed circuit board 3 in the case 1, an integrated relay block in which the body ECU 2b is integrated is mounted on the vehicle.

そして、サブプリント基板３には、図２に示すように、受信回路２ａに接続される受信用のアンテナパターン５が形成され、サブプリント基板３の主面に直交する方向に複数の端子体６が立設されるように、これら複数の端子体６がアンテナパターン５に電気的に接続され、いずれかの端子体６がメインプリント基板２の配線パターンを介して受信回路２ａに電気的に接続される。このように、アンテナパターン５に複数の端子体６を立設することにより、立体構造の受信アンテナが構成される。   As shown in FIG. 2, a reception antenna pattern 5 connected to the reception circuit 2 a is formed on the sub printed circuit board 3, and a plurality of terminal bodies 6 are arranged in a direction orthogonal to the main surface of the sub printed circuit board 3. The plurality of terminal bodies 6 are electrically connected to the antenna pattern 5 so that one of the terminal bodies 6 is electrically connected to the receiving circuit 2a via the wiring pattern of the main printed circuit board 2. Is done. In this manner, a plurality of terminal bodies 6 are erected on the antenna pattern 5 to form a three-dimensional receiving antenna.

このとき、複数の端子体６として、メインプリント基板２に実装されたいずれかのコネクタ２ｃのうち未使用端子ピンを有するコネクタ２ｃを利用し、未使用端子ピンをサブプリント基板３のアンテナパターン５に接続すればよい。なお、コネクタ２ｃの未使用端子ピンに限らず別体のピンを使用してもよい。また、チューニングの程度に応じて、ピンよりも幅広の端子体を使用してもよく、端子体６の個数や幅を適宜設定することによって受信感度を簡単に調整することができる。   At this time, a connector 2c having an unused terminal pin among any of the connectors 2c mounted on the main printed circuit board 2 is used as the plurality of terminal bodies 6, and the unused terminal pins are used as the antenna pattern 5 of the sub printed circuit board 3. Connect to In addition, you may use not only the unused terminal pin of the connector 2c but a separate pin. Further, a terminal body wider than the pin may be used according to the degree of tuning, and reception sensitivity can be easily adjusted by appropriately setting the number and width of the terminal bodies 6.

また、ボデーＥＣＵ２ｂに極力ノイズの影響が及ばないよう、アンテナパターン５は、メインプリント基板２のグランドラインを構成する配線パターンからできる限り離れた位置に形成するのが望ましい。   Further, it is desirable to form the antenna pattern 5 at a position as far as possible from the wiring pattern constituting the ground line of the main printed circuit board 2 so that the body ECU 2b is not affected by noise as much as possible.

したがって、上記した実施形態によれば、サブプリント基板３にメイン側の受信回路２ａに接続される受信用のアンテナパターン５を形成し、複数の端子体６をアンテナパターン５に接続するため、もともと装置が備えるサブプリント基板３を利用して簡単に立体構造のアンテナを形成することができ、従来の受信モジュール基板のような別部材を準備する必要がなく、簡単かつ安価に立体構造のアンテナを実現することができる。   Therefore, according to the above-described embodiment, the receiving antenna pattern 5 connected to the main-side receiving circuit 2 a is formed on the sub-printed circuit board 3, and the plurality of terminal bodies 6 are connected to the antenna pattern 5. The three-dimensional structure antenna can be easily formed by using the sub-printed board 3 provided in the apparatus, and it is not necessary to prepare a separate member unlike the conventional receiving module board, and the three-dimensional structure antenna can be easily and inexpensively prepared. Can be realized.

また、サブプリント基板３の主面に直交する方向に複数の端子体６が立設されてアンテナパターン５に接続され、いずれかの端子体６がメインプリント基板２の受信回路２ａに接続されるため、端子体６の個数を増減することで容易に受信感度を調整することができる上、アンテナパターン５および端子体６による立体構造によって、従来の平面状のパターンアンテナのような受信感度の低下を防止することが可能になる。   A plurality of terminal bodies 6 are erected in a direction orthogonal to the main surface of the sub printed circuit board 3 and connected to the antenna pattern 5, and any one of the terminal bodies 6 is connected to the receiving circuit 2 a of the main printed circuit board 2. Therefore, the reception sensitivity can be easily adjusted by increasing / decreasing the number of the terminal bodies 6 and the reception sensitivity is lowered as in the conventional planar pattern antenna due to the three-dimensional structure of the antenna pattern 5 and the terminal body 6. Can be prevented.

なお、本発明は上記した実施形態に限定されるものではなく、その趣旨を逸脱しない限りにおいて上述したもの以外に種々の変更を行なうことが可能である。   The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

例えば、上記した実施形態では、キーレスエントリー用のＲＦ受信装置に本発明を適用した場合について説明したが、タイヤに装着したタイヤセンサと車体側に装着してセンサ受信装置その他の車載無線受信装置であって、メインプリント基板およびサブプリント基板の２つの基板を備えるものであれば、本発明を適用することが可能である。   For example, in the above-described embodiment, the case where the present invention is applied to an RF receiver for keyless entry has been described. However, a tire sensor attached to a tire and a sensor receiver or other in-vehicle wireless receiver attached to a vehicle body side. In addition, the present invention can be applied as long as it includes two substrates, a main printed circuit board and a sub printed circuit board.

１ …ケース
１ａ，１ｂ …第１、第２ケース体
２ …メインプリント基板
２ａ …受信回路
２ｂ …ボデーＥＣＵ（制御回路）
３ …サブプリント基板
５ …アンテナパターン
６ …端子体 DESCRIPTION OF SYMBOLS 1 ... Case 1a, 1b ... 1st, 2nd case body 2 ... Main printed circuit board 2a ... Reception circuit 2b ... Body ECU (control circuit)
3 ... Sub-printed circuit board 5 ... Antenna pattern 6 ... Terminal body

Claims (1)

メインプリント基板およびサブプリント基板を備え、外部機器からの無線信号を受信する車載用無線受信装置において、
前記メインプリント基板および前記サブプリント基板がケース内に収容され、
前記メインプリント基板には、前記無線信号を受信する受信回路と、前記受信回路により受信された前記無線信号に応じた制御を行う制御回路とが配設され、
前記サブプリント基板には、前記受信回路に接続される受信用のアンテナパターンが形成され、
前記サブプリント基板の主面に直交する方向に複数の端子体が立設されて前記アンテナパターンに接続されいずれかの前記端子体が前記受信回路に接続されていることを特徴とする車載用無線受信装置。 In a vehicle-mounted wireless receiver that includes a main printed circuit board and a sub printed circuit board and receives wireless signals from external devices,
The main printed circuit board and the sub printed circuit board are accommodated in a case,
The main printed circuit board is provided with a receiving circuit that receives the wireless signal, and a control circuit that performs control according to the wireless signal received by the receiving circuit,
The sub printed circuit board is formed with a receiving antenna pattern connected to the receiving circuit,
A vehicle-mounted radio, wherein a plurality of terminal bodies are erected in a direction orthogonal to a main surface of the sub-printed circuit board and connected to the antenna pattern, and any one of the terminal bodies is connected to the receiving circuit. Receiver device.
JP2016251119A 2016-12-26 2016-12-26 In-vehicle wireless receiver Active JP6914583B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11664615B2 (en) 2018-08-07 2023-05-30 Tyco Electronics Japan G.K. Circuit board having terminal, and circuit board assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11664615B2 (en) 2018-08-07 2023-05-30 Tyco Electronics Japan G.K. Circuit board having terminal, and circuit board assembly

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