JP2013184626A - Transmitter receiver - Google Patents

Transmitter receiver Download PDF

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JP2013184626A
JP2013184626A JP2012052662A JP2012052662A JP2013184626A JP 2013184626 A JP2013184626 A JP 2013184626A JP 2012052662 A JP2012052662 A JP 2012052662A JP 2012052662 A JP2012052662 A JP 2012052662A JP 2013184626 A JP2013184626 A JP 2013184626A
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coil
bobbin
key
diameter
outer periphery
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Tsutomu Sawai
剣 澤井
Tatsuki Hotani
竜起 帆谷
Yuji Deguchi
裕司 出口
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Panasonic Corp
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Panasonic Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a transmitter receiver that is mainly used for the operation of an ignition switch of an automobile etc., and enables reliable communication by a simple structure.SOLUTION: A bobbin 13 which is mounted to an outer periphery of a key cylinder 1 and around which a coil 14 is wound is formed having a substantial elliptical shape or a substantial oval shape. As a result, even if a diameter in a predetermined direction of the bobbin 13 is formed small in size due to shapes or the like of other parts in the vicinity, a diameter orthogonal direction to a diameter in the predetermined direction is formed large in size, whereby the magnetic force of the coil 14 in this direction is not weakened, and a transmitter receiver can be obtained which enables reliable communication with a portable device 8 by a simple structure.

Description

本発明は、主に自動車のイグニションスイッチに使用される送受信装置に関するものである。   The present invention relates to a transmission / reception apparatus used mainly for an ignition switch of an automobile.

近年、車両のイグニションスイッチに装着した送受信装置と、キーが取付けられ運転者が携帯した携帯機の間で通信を行い、運転者を確認した後にエンジンを起動することが広く行われている。   2. Description of the Related Art In recent years, it has been widely practiced to perform communication between a transmission / reception device mounted on an ignition switch of a vehicle and a portable device that is attached with a key and carried by a driver and starts the engine after confirming the driver.

このような従来の送受信装置及びこれを用いた通信システムについて、図４を用いて説明する。   Such a conventional transmission / reception apparatus and a communication system using the same will be described with reference to FIG.

図４は従来の通信システムの斜視図であり、同図において、１は略円筒状で金属製のキーシリンダで、キーシリンダ１内には前面にキー挿入孔２Ａが形成された、金属製のキーロータ２が収納されている。   FIG. 4 is a perspective view of a conventional communication system. In FIG. 4, reference numeral 1 denotes a substantially cylindrical metal key cylinder, and a key insertion hole 2A is formed in the key cylinder 1 on the front surface. The key rotor 2 is accommodated.

そして、３は円形で絶縁樹脂製のボビン、４は銅合金線等に絶縁樹脂が被覆されたコイルで、ボビン３がキーシリンダ１外周に固定装着されると共に、ボビン３外周にはコイル４が巻回されて、アンテナ５が形成されている。   3 is a circular bobbin made of an insulating resin, 4 is a coil in which a copper alloy wire or the like is coated with an insulating resin, the bobbin 3 is fixedly mounted on the outer periphery of the key cylinder 1, and the coil 4 is mounted on the outer periphery of the bobbin 3. The antenna 5 is formed by being wound.

また、６はマイコン等の制御手段で、複数の配線パターンが形成された配線基板（図示せず）に実装装着されると共に、配線パターンを介して制御手段６がコイル４に接続されて、送受信装置７が構成されている。   A control means 6 such as a microcomputer is mounted on a wiring board (not shown) on which a plurality of wiring patterns are formed, and the control means 6 is connected to the coil 4 via the wiring patterns to transmit and receive. A device 7 is configured.

さらに、８は携帯機で、絶縁樹脂製のケース９に金属製のキー１０の一端が固着されると共に、ケース９内にはコイルやマイコン等の送受信機１１が設けられて、通信システムが形成されている。   Further, 8 is a portable device, and one end of a metal key 10 is fixed to a case 9 made of insulating resin, and a transmitter / receiver 11 such as a coil or a microcomputer is provided in the case 9 to form a communication system. Has been.

そして、このような送受信装置７が自動車の運転席前方に取付けられると共に、制御手段６がコネクタやリード線（図示せず）等を介して、車両の電子回路に電気的に接続される。   Such a transmission / reception device 7 is mounted in front of the driver's seat of the automobile, and the control means 6 is electrically connected to an electronic circuit of the vehicle via a connector, a lead wire (not shown) or the like.

以上の構成において、運転者がキーロータ２のキー挿入孔２Ａに携帯機８のキー１０を挿入すると、キーシリンダ１内に設けられた検知スイッチ（図示せず）の電気的接離が行われ、これを制御手段６が検出して、コイル４に電流を流して磁界を発生させ、これによって携帯機８の送受信機１１が起動して、送受信装置７毎に異なる識別コード等の操作信号が電波として送信される。   In the above configuration, when the driver inserts the key 10 of the portable device 8 into the key insertion hole 2A of the key rotor 2, a detection switch (not shown) provided in the key cylinder 1 is electrically connected and separated. This is detected by the control means 6 to cause a current to flow through the coil 4 to generate a magnetic field, whereby the transmitter / receiver 11 of the portable device 8 is activated, and an operation signal such as an identification code different for each transmitter / receiver 7 As sent.

そして、この操作信号をコイル４を介して制御手段６が受信し、識別コードを照合して運転者が確認できた場合には、この後、携帯機８のキー１０を回転操作すると、エンジンが起動する。   Then, when the control means 6 receives this operation signal via the coil 4 and the driver can confirm by checking the identification code, after that, when the key 10 of the portable device 8 is rotated, the engine to start.

つまり、キー１０をキー挿入孔２Ａに挿入すると、先ずコイル４に磁界が発生して携帯機８の送受信機１１を起動させると共に、送受信機１１から送信された識別コードによって制御手段６が運転者を照合し、確認できた場合にはキー１０を回転操作すると、エンジンが起動するように構成されているものであった。   That is, when the key 10 is inserted into the key insertion hole 2A, first, a magnetic field is generated in the coil 4 to activate the transmitter / receiver 11 of the portable device 8, and the control means 6 is operated by the driver by the identification code transmitted from the transmitter / receiver 11. If the key 10 is rotated, the engine is started.

なお、この出願の発明に関連する先行技術文献情報としては、例えば、特許文献１が知られている。   As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

特開２００７−１７６３２０号公報JP 2007-176320 A

しかしながら、上記従来の送受信装置７においては、車両のシャーシやネジ等の近傍の部品の形状によって、コイル４が巻回されたボビン３の直径を小さくした場合、コイル４に生じる磁力が弱まると共に、ボビン３は金属製のキーシリンダ１前端から２〜１０ｍｍ後方に装着されているため、コイル４から送信される電波がキーシリンダ１前端によって遮られてしまい、携帯機８との通信に支障をきたす場合があるという課題があった。   However, in the above conventional transmission / reception device 7, when the diameter of the bobbin 3 around which the coil 4 is wound is reduced due to the shape of parts in the vicinity of the vehicle chassis and screws, the magnetic force generated in the coil 4 is weakened. Since the bobbin 3 is mounted 2 to 10 mm behind the front end of the metal key cylinder 1, the radio wave transmitted from the coil 4 is blocked by the front end of the key cylinder 1, thereby hindering communication with the portable device 8. There was a problem that there was a case.

本発明は、このような従来の課題を解決するものであり、簡易な構成で、携帯機との確実な通信が可能な送受信装置を提供することを目的とする。   The present invention solves such a conventional problem, and an object of the present invention is to provide a transmission / reception apparatus capable of reliable communication with a portable device with a simple configuration.

上記目的を達成するために本発明は、キーシリンダ外周に装着され、外周にコイルが巻回されたボビンを、略楕円形または略小判形に形成して送受信装置を構成したものであり、近傍の他部品の形状等によってボビンの所定方向の直径を小さくした場合でも、これと直交方向の直径は大きく形成されているため、この方向のコイルの磁力が弱まることはなく、簡易な構成で、携帯機との確実な通信が可能な送受信装置を得ることができるという作用を有するものである。   In order to achieve the above object, the present invention comprises a bobbin mounted on the outer periphery of a key cylinder and having a coil wound around the outer periphery to form a substantially elliptical or substantially oval shape, and constitutes a transmitter / receiver. Even when the diameter of the bobbin in a predetermined direction is reduced due to the shape of other parts, etc., since the diameter in the direction orthogonal to this is formed large, the magnetic force of the coil in this direction will not be weakened, with a simple configuration, It has an effect that a transmission / reception device capable of reliable communication with a portable device can be obtained.

以上のように本発明によれば、簡易な構成で、確実な通信が可能な送受信装置を実現することができるという有利な効果が得られる。   As described above, according to the present invention, it is possible to obtain an advantageous effect that a transmission / reception apparatus capable of reliable communication can be realized with a simple configuration.

本発明の一実施の形態による通信システムの斜視図1 is a perspective view of a communication system according to an embodiment of the present invention. 同正面図Front view 同断面図Cross section 従来の通信システムの斜視図A perspective view of a conventional communication system

以下、本発明の実施の形態について、図１〜図３を用いて説明する。   Hereinafter, embodiments of the present invention will be described with reference to FIGS.

なお、背景技術の項で説明した構成と同一構成の部分には同一符号を付して、詳細な説明を簡略化する。   In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

（実施の形態）
図１は本発明の一実施の形態による通信システムの斜視図であり、同図において、１は略円筒状で亜鉛合金等の金属製のキーシリンダで、キーシリンダ１内には前面にキー挿入孔２Ａが形成された、鉄等の金属製のキーロータ２が収納されている。 (Embodiment)
FIG. 1 is a perspective view of a communication system according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a substantially cylindrical key cylinder made of a metal such as zinc alloy. A key rotor 2 made of metal such as iron, in which a hole 2A is formed, is accommodated.

また、１３はポリブチレンテレフタレートやＡＢＳ等の絶縁樹脂製のボビン、１４は銅合金線等にポリウレタン等の絶縁樹脂が被覆されたコイルで、ボビン１３がキーシリンダ１外周に固定装着されると共に、ボビン１３外周にはコイル１４が巻回されて、アンテナ１５が形成されている。   In addition, 13 is a bobbin made of an insulating resin such as polybutylene terephthalate or ABS, 14 is a coil in which a copper alloy wire or the like is covered with an insulating resin such as polyurethane, and the bobbin 13 is fixedly attached to the outer periphery of the key cylinder 1. A coil 14 is wound around the outer periphery of the bobbin 13 to form an antenna 15.

そして、ボビン１３が略楕円形または略小判形に形成されると共に、図１や図２（ａ）の正面図に示すように、外周にコイル１４が略楕円形または略小判形に巻回されたボビン１３は、垂直方向に縦長に形成されたキー挿入孔２Ａに対して所定角度、例えば４５度前後傾いた状態で、キーシリンダ１外周に固定装着されている。   The bobbin 13 is formed in a substantially oval shape or a substantially oval shape, and the coil 14 is wound around the outer periphery in a substantially oval or oval shape as shown in the front views of FIGS. 1 and 2A. The bobbin 13 is fixedly attached to the outer periphery of the key cylinder 1 in a state inclined at a predetermined angle, for example, about 45 degrees with respect to the key insertion hole 2A formed vertically long in the vertical direction.

つまり、車両のシャーシやネジ等の近傍の部品の形状に応じて、例えばネジ２０がキーシリンダ１外周近傍の４５度前後の箇所に配置されていた場合でも、ネジ２０が配置された略左右方向のボビン１３の直径は小さくなっているが、これと直交方向の略上下方向の直径は大きく形成されている。   In other words, depending on the shape of parts in the vicinity of the vehicle chassis and screws, for example, even when the screws 20 are arranged at around 45 degrees near the outer periphery of the key cylinder 1, the substantially left-right direction in which the screws 20 are arranged. The diameter of the bobbin 13 is small, but the diameter in the substantially vertical direction perpendicular to the bobbin 13 is large.

また、１６はマイコン等の制御手段で、複数の配線パターンが形成された配線基板（図示せず）に実装装着されると共に、配線パターンを介して制御手段１６がコイル１４に接続されて、送受信装置１７が構成されている。   Reference numeral 16 denotes a control means such as a microcomputer, which is mounted and mounted on a wiring board (not shown) on which a plurality of wiring patterns are formed, and the control means 16 is connected to the coil 14 via the wiring patterns to transmit and receive. A device 17 is configured.

さらに、８は携帯機で、絶縁樹脂製のケース９に金属製のキー１０の一端が固着されると共に、ケース９内にはコイルやマイコン等の送受信機１１が設けられて、通信システムが形成されている。   Further, 8 is a portable device, and one end of a metal key 10 is fixed to a case 9 made of insulating resin, and a transmitter / receiver 11 such as a coil or a microcomputer is provided in the case 9 to form a communication system. Has been.

そして、このような送受信装置１７が自動車の運転席前方に取付けられると共に、制御手段１６がコネクタやリード線（図示せず）等を介して、車両の電子回路に電気的に接続される。   Such a transmission / reception device 17 is mounted in front of the driver's seat of the automobile, and the control means 16 is electrically connected to an electronic circuit of the vehicle via a connector, a lead wire (not shown) or the like.

以上の構成において、運転者がキーロータ２のキー挿入孔２Ａに携帯機８のキー１０を挿入すると、キーシリンダ１内に設けられた検知スイッチ（図示せず）の電気的接離が行われ、これによってキー１０が挿入されたことを制御手段１６が検出して、コイル１４に電流を流して磁界を発生させる。   In the above configuration, when the driver inserts the key 10 of the portable device 8 into the key insertion hole 2A of the key rotor 2, a detection switch (not shown) provided in the key cylinder 1 is electrically connected and separated. Thus, the control means 16 detects that the key 10 has been inserted, and a current is passed through the coil 14 to generate a magnetic field.

なお、この時、ボビン１３が略楕円形または略小判形に形成されると共に、キー挿入孔２Ａに対して４５度前後傾いた状態でキーシリンダ１外周に固定装着されて、略上下方向の直径は大きく形成されているため、図３（ａ）の断面図に示すように、コイル１４の磁力が弱まることはなく、金属製のキーシリンダ１前端から２〜１０ｍｍ後方に装着された状態でも、コイル１４からの磁力がキーシリンダ１前端によって遮られずに携帯機８に到達できるようになっている。   At this time, the bobbin 13 is formed in a substantially elliptical shape or a substantially oval shape, and is fixedly mounted on the outer periphery of the key cylinder 1 in a state of being tilted about 45 degrees with respect to the key insertion hole 2A. As shown in the cross-sectional view of FIG. 3A, the magnetic force of the coil 14 is not weakened, and even when mounted 2-10 mm behind from the front end of the metal key cylinder 1, The magnetic force from the coil 14 can reach the portable device 8 without being blocked by the front end of the key cylinder 1.

そして、このコイル１４からの磁力によって、携帯機８の送受信機１１が起動し、送受信装置１７毎に異なる識別コード等の操作信号が送受信機１１から電波として送信され、これを制御手段１６がコイル１４を介して受信し、あらかじめ記憶していた識別コードと照合して、運転者の確認が行われる。   The transmitter / receiver 11 of the portable device 8 is activated by the magnetic force from the coil 14, and an operation signal such as an identification code that differs for each transmitter / receiver 17 is transmitted as a radio wave from the transmitter / receiver 11. The driver's confirmation is performed by collating with the identification code received through 14 and stored in advance.

また、この後、携帯機８のキー１０を所定角度、例えば図２（ｂ）に示すように、４５度に回転操作すると、キーロータ２が回転してラジオやカーナビゲーション等のアクセサリの電源が入り、図２（ｃ）に示すように、９０度まで回転操作すると、ライトやワイパー等の車両全体の電源が入り、さらに１２０度まで回転操作すると、スタータが入ってエンジンが起動し、携帯機８から手を離すと、キーロータ２が９０度の位置に戻る。   After that, when the key 10 of the portable device 8 is rotated at a predetermined angle, for example, 45 degrees as shown in FIG. 2 (b), the key rotor 2 rotates to turn on accessories such as radio and car navigation. As shown in FIG. 2 (c), when the rotation operation is performed up to 90 degrees, the power of the entire vehicle such as a light and a wiper is turned on. When the rotation operation is further performed up to 120 degrees, the starter is activated and the engine is started. When the hand is released, the key rotor 2 returns to the 90-degree position.

なお、この時、送受信機１１から送信された操作信号が、制御手段１６が記憶した識別コードと一致していなかった場合には、キー１０を９０度まで回転操作した時に、制御手段１６が再度コイル１４に磁界を発生させて送受信機１１を起動させ、送受信機１１から制御手段１６にコイル１４を介して操作信号が送信される。   At this time, if the operation signal transmitted from the transmitter / receiver 11 does not match the identification code stored in the control means 16, the control means 16 again turns when the key 10 is rotated to 90 degrees. A magnetic field is generated in the coil 14 to activate the transceiver 11, and an operation signal is transmitted from the transceiver 11 to the control means 16 via the coil 14.

そして、この再度送信された識別コードも一致しない場合には、運転者が異なると制御手段１６が判断し、キー１０を１２０度まで回転操作しても、スタータは入るがエンジンは起動しないようになっている。   If the re-transmitted identification code does not match, the control means 16 determines that the driver is different, and even if the key 10 is rotated to 120 degrees, the starter enters but the engine does not start. It has become.

また、この再確認のために制御手段１６と送受信機１１が通信を行う際にも、携帯機８が９０度回転した状態では、コイル１４が巻回されたボビン１３の略上下方向の直径は大きく形成されているため、図３（ａ）に示した場合と同様に、コイル１４の磁力が弱まることや、磁力が金属製のキーシリンダ１前端によって遮られることもなく、確実に通信が行われるように形成されている。   In addition, when the control unit 16 and the transceiver 11 communicate with each other for this reconfirmation, when the portable device 8 is rotated 90 degrees, the diameter of the bobbin 13 around which the coil 14 is wound is approximately vertical. Since it is formed in a large size, similarly to the case shown in FIG. 3A, the magnetic force of the coil 14 is not weakened, and the magnetic force is not blocked by the front end of the metal key cylinder 1, so that communication can be performed reliably. It is formed to be.

なお、図２（ｂ）に示すように、キーロータ２が４５度回転した状態では、略左右方向のボビン１３の直径が小さくなっているため、図３（ｂ）に示すように、コイル１４に生じる磁力が弱まると共に、コイル１４から送信される電波が、金属製のキーシリンダ１前端によって遮られてしまうが、この操作角度では、制御手段１６と送受信機１１の間では通信が行われないため、支障は生じない。   As shown in FIG. 2B, when the key rotor 2 is rotated by 45 degrees, the diameter of the bobbin 13 in the substantially left-right direction is small. Therefore, as shown in FIG. The generated magnetic force is weakened, and the radio wave transmitted from the coil 14 is blocked by the front end of the metal key cylinder 1. However, at this operating angle, no communication is performed between the control means 16 and the transceiver 11. No trouble will occur.

つまり、キー１０をキー挿入孔２Ａに挿入すると、制御手段１６と送受信機１１がコイル１４を介して通信を行い、識別コードによって制御手段１６が運転者を確認できた場合には、キー１０を回転操作するとエンジンが起動するが、識別コードが一致しない場合には再度通信を行い、それでも一致しない場合にはエンジンが起動しないように構成されている。   That is, when the key 10 is inserted into the key insertion hole 2A, the control means 16 and the transmitter / receiver 11 communicate with each other via the coil 14, and the control means 16 can confirm the driver by the identification code. When the rotation operation is performed, the engine is started, but communication is performed again when the identification codes do not match, and the engine is not started when the identification codes still do not match.

そして、本発明においては、ボビン１３が略楕円形または略小判形に形成されると共に、キー挿入孔２Ａに対して４５度前後傾いた状態で、キーシリンダ１外周に固定装着されているため、キーロータ２が回転する前の状態や、９０度回転した状態では、コイル１４の磁力が弱まることや、磁力が金属製のキーシリンダ１前端によって遮られることなく、確実に通信が行えるようになっている。   In the present invention, the bobbin 13 is formed in a substantially elliptical shape or a substantially oval shape, and is fixedly mounted on the outer periphery of the key cylinder 1 in a state inclined about 45 degrees with respect to the key insertion hole 2A. In the state before the key rotor 2 rotates or in the state rotated 90 degrees, the magnetic force of the coil 14 is weakened, and the magnetic force is not interrupted by the front end of the metal key cylinder 1 so that communication can be performed reliably. Yes.

すなわち、コイル１４が巻回されたボビン１３の、略左右方向の直径は小さくなっているが、略上下方向の直径は大きく形成されているため、これらの角度での、コイル１４を介した制御手段１６と送受信機１１の通信が、確実に行われるように構成されている。   That is, although the diameter of the bobbin 13 around which the coil 14 is wound is substantially small in the left-right direction, the diameter in the substantially vertical direction is large. Therefore, the control via the coil 14 at these angles is performed. The communication between the means 16 and the transceiver 11 is configured to be performed reliably.

このように本実施の形態によれば、キーシリンダ１外周に装着され、外周にコイル１４が巻回されたボビン１３を、略楕円形または略小判形に形成することによって、近傍の他部品の形状等によってボビン１３の所定方向の直径を小さくした場合でも、これと直交方向の直径は大きく形成されているため、この方向のコイル１４の磁力が弱まることはなく、簡易な構成で、携帯機８との確実な通信が可能な送受信装置を得ることができるものである。   As described above, according to the present embodiment, the bobbin 13 that is attached to the outer periphery of the key cylinder 1 and has the coil 14 wound around the outer periphery is formed into a substantially elliptical shape or a substantially oval shape. Even when the diameter of the bobbin 13 in a predetermined direction is reduced due to the shape or the like, the diameter in the direction orthogonal to the bobbin 13 is formed large. Therefore, the magnetic force of the coil 14 in this direction is not weakened, and the portable device has a simple configuration. 8 can be obtained.

また、近傍の他部品の形状等に応じて、垂直方向に縦長に形成されたキー挿入孔２Ａに対してボビン１３を所定角度、例えば４５度前後傾けた状態で、キーシリンダ１外周に装着することで、キーロータ２の回転角度に応じて、コイル１４を介した制御手段１６と送受信機１１の確実な通信を行うことができる。   Further, the bobbin 13 is mounted on the outer periphery of the key cylinder 1 in a state where the bobbin 13 is inclined at a predetermined angle, for example, about 45 degrees with respect to the key insertion hole 2A formed vertically long in accordance with the shape of other parts in the vicinity. Thus, according to the rotation angle of the key rotor 2, reliable communication between the control means 16 and the transceiver 11 via the coil 14 can be performed.

本発明による送受信装置は、簡易な構成で、確実な通信が可能なものが得られ、主に自動車のイグニションスイッチ等の操作用として有用である。   The transmission / reception apparatus according to the present invention has a simple configuration and enables reliable communication, and is mainly useful for operation of an ignition switch or the like of an automobile.

１ キーシリンダ
２ キーロータ
２Ａ キー挿入孔
８ 携帯機
９ ケース
１０ キー
１１ 送受信機
１３ ボビン
１４ コイル
１５ アンテナ
１６ 制御手段
１７ 送受信装置
２０ ネジ DESCRIPTION OF SYMBOLS 1 Key cylinder 2 Key rotor 2A Key insertion hole 8 Portable machine 9 Case 10 Key 11 Transmitter / receiver 13 Bobbin 14 Coil 15 Antenna 16 Control means 17 Transmitter / receiver 20 Screw

Claims (1)

キーシリンダ外周に装着されたボビンと、このボビン外周に巻回されたコイルと、このコイルで電波を送受信する制御手段からなり、上記ボビンを略楕円形または略小判形に形成した送受信装置。 A transmission / reception apparatus comprising a bobbin mounted on the outer periphery of a key cylinder, a coil wound around the outer periphery of the bobbin, and a control means for transmitting and receiving radio waves using the coil, wherein the bobbin is formed in a substantially oval or oval shape.
JP2012052662A 2012-03-09 2012-03-09 Transmitter receiver Pending JP2013184626A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08296354A (en) * 1994-02-08 1996-11-12 Texas Instr Inc <Ti> Improved inductor/antenna for transmitter-receiver
JPH09100666A (en) * 1995-10-05 1997-04-15 Tokai Rika Co Ltd Key cylinder
JPH09142258A (en) * 1995-11-24 1997-06-03 Nippon Soken Inc Automatic answering system using transponder
JPH09170366A (en) * 1995-12-21 1997-06-30 Nippon Soken Inc Burglar preventive device
JP2004084406A (en) * 2002-08-29 2004-03-18 Mitsubishi Electric Corp System for remote control of vehicle-mounted equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08296354A (en) * 1994-02-08 1996-11-12 Texas Instr Inc <Ti> Improved inductor/antenna for transmitter-receiver
JPH09100666A (en) * 1995-10-05 1997-04-15 Tokai Rika Co Ltd Key cylinder
JPH09142258A (en) * 1995-11-24 1997-06-03 Nippon Soken Inc Automatic answering system using transponder
JPH09170366A (en) * 1995-12-21 1997-06-30 Nippon Soken Inc Burglar preventive device
JP2004084406A (en) * 2002-08-29 2004-03-18 Mitsubishi Electric Corp System for remote control of vehicle-mounted equipment

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