JP3335846B2 - Tire pressure warning device - Google Patents
Tire pressure warning deviceInfo
- Publication number
- JP3335846B2 JP3335846B2 JP22448296A JP22448296A JP3335846B2 JP 3335846 B2 JP3335846 B2 JP 3335846B2 JP 22448296 A JP22448296 A JP 22448296A JP 22448296 A JP22448296 A JP 22448296A JP 3335846 B2 JP3335846 B2 JP 3335846B2
- Authority
- JP
- Japan
- Prior art keywords
- tire pressure
- antenna
- processing circuit
- tire
- signal processing
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0491—Constructional details of means for attaching the control device
- B60C23/0494—Valve stem attachments positioned inside the tyre chamber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
- B60C23/02—Signalling devices actuated by tyre pressure
- B60C23/04—Signalling devices actuated by tyre pressure mounted on the wheel or tyre
- B60C23/0408—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
- B60C23/0422—Signalling devices actuated by tyre pressure mounted on the wheel or tyre transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver characterised by the type of signal transmission means
- B60C23/0433—Radio signals
- B60C23/0447—Wheel or tyre mounted circuits
- B60C23/0452—Antenna structure, control or arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明はタイヤ空気圧の異常
を検出して、車内の運転者に警報するためのタイヤ空気
圧警報装置に係り、特に送信部のアンテナ効率の向上が
図れるタイヤ空気圧警報装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire pressure warning device for detecting an abnormality in tire pressure and warning a driver in a vehicle, and more particularly to a tire pressure warning device capable of improving the antenna efficiency of a transmitter. Things.
【０００２】[0002]
【従来の技術】車両タイヤの空気圧が低下したことを検
出し、これを運転者に報知するようにしたタイヤ空気圧
警報装置がＷＯ９４／２０３１７号公報に開示されてい
る。この従来のタイヤ空気圧警報装置は、図２に示すよ
うに、ホイールリム１内部に配置される送信部７と、タ
イヤに空気を注入するためのバルブステム１０とで構成
されている。2. Description of the Related Art A tire pressure warning device is disclosed in WO 94/20317, which detects a decrease in air pressure of a vehicle tire and notifies the driver of the decrease. As shown in FIG. 2, the conventional tire pressure warning device includes a transmission unit 7 disposed inside the wheel rim 1 and a valve stem 10 for injecting air into a tire.
【０００３】前記送信部７は、ケース２の内部に、タイ
ヤ空気圧を検出する圧力検知部３と、この検出圧力を電
波で車体側の受信機に信号を送信させるための信号処理
回路４と、該信号処理回路４のマイコンを作動させるた
めの電池５とが内蔵されている。また、前記信号処理回
路４とベース１３との間を給電線６にて接続し、タイヤ
バルブのバルブステム１０自体をアンテナとして用いる
ものであった。The transmitting unit 7 includes a pressure detecting unit 3 for detecting tire pressure in a case 2, a signal processing circuit 4 for transmitting the detected pressure to a receiver on the vehicle body by radio waves, A battery 5 for operating the microcomputer of the signal processing circuit 4 is built in. Further, the signal processing circuit 4 and the base 13 are connected by the power supply line 6, and the valve stem 10 of the tire valve itself is used as an antenna.
【０００４】また、前記バルブステム１０は、インサー
ト成形によりケース２と一体的に設けられているもので
あり、図２の断面図で示すごとく、ケース２の上面に位
置する部分にベース１３が一体的に設けられている。そ
して、ベース１３の上部にはリング状の溝１４が設けら
れ、該溝１４にＯリング１５を装着することによってバ
ルブステム１０を座金８とナット９で締め付けたときに
ホイールリム１との間の気密を保つようになっている。The valve stem 10 is provided integrally with the case 2 by insert molding. As shown in a sectional view of FIG. Is provided. A ring-shaped groove 14 is provided at an upper portion of the base 13, and an O-ring 15 is attached to the groove 14 so that when the valve stem 10 is tightened with the washer 8 and the nut 9, the gap between the wheel rim 1 and the wheel rim 1 is formed. They are kept airtight.
【０００５】また、前記信号処理回路４の給電線６の一
端部を前記バルブステム１０の下端部にはんだ付けする
ことにより、バルブステム１０自体にアンテナの機能を
もたせるようにしていた。Further, one end of the power supply line 6 of the signal processing circuit 4 is soldered to the lower end of the valve stem 10 so that the valve stem 10 itself has an antenna function.
【０００６】[0006]
【発明が解決しようとする課題】ところが、上述のごと
くタイヤバルブ１０をアンテナとするものでは、バルブ
ステム１０が金属製のホイールリム１と導通状態にて接
触しているため、送信電波は空中を伝播するだけでなく
筐体伝播、すなわち、バルブステム１０からホイールリ
ム１へと車体側に電波が伝わり、図示しないが、車室内
に設けられた受信機に電波が到達しにくいという問題点
があった。However, in the case where the tire valve 10 is used as an antenna as described above, since the valve stem 10 is in contact with the metal wheel rim 1 in a conductive state, the transmitted radio wave passes through the air. In addition to propagation, the radio wave is transmitted to the vehicle body from the valve stem 10 to the wheel rim 1 from the valve stem 10, and although not shown, there is a problem that the radio wave is difficult to reach a receiver provided in the passenger compartment. Was.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記のような
筐体伝播によるアンテナの送信レベルが減衰するのを防
ぐためになされたもので、絶縁体であるゴム製のグロメ
ットの内部にコイル状のアンテナを設けることにより、
送信性能を著しく向上させたタイヤ空気圧警報装置の提
供を目的とするものである。すなわち、本発明のタイヤ
空気圧警報装置は、タイヤ空気圧を検出する圧力検知部
３と、この検出圧力を電波で車体側の受信機に信号を送
信させるための信号処理回路４と、該信号処理回路４の
マイコンを作動させるための電池５とがケース２に収納
された送信部７をホイールリム１内に配置し、前記ケー
ス２の上部にはタイヤに空気を注入するためのバルブス
テム１０がインサート成形等により一体的に設けられた
タイヤ空気圧警報装置において、前記ケース２と一体的
に形成されたバルブステム１０の基部には、加硫にて内
部にコイル状のアンテナ１１を一体的に設けてなるゴム
製のグロメット１２を配置させると共に、前記アンテナ
１１の一端部を前記信号処理回路４の給電線６に接続
し、前記グロメット１２を介してバルブステム１０をホ
イールリム１のバルブ孔に座金８およびナット９にて固
着するようにしたことを特徴とするものである。SUMMARY OF THE INVENTION The present invention has been made in order to prevent the transmission level of an antenna from being attenuated due to the above-described case propagation, and has a coil-like structure inside a rubber grommet which is an insulator. By providing an antenna of
It is an object of the present invention to provide a tire pressure warning device having significantly improved transmission performance. That is, the tire pressure alarm device of the present invention includes a pressure detection unit 3 for detecting tire pressure, a signal processing circuit 4 for transmitting a signal of the detected pressure to a receiver on the vehicle body by radio waves, and a signal processing circuit. 4. A transmitter 7 in which a battery 5 for operating a microcomputer is accommodated in a case 2 is disposed in a wheel rim 1, and a valve for injecting air into a tire is provided above the case 2. In the tire pressure alarm device in which the stem 10 is integrally provided by insert molding or the like, a coiled antenna 11 is integrally formed inside the base of the valve stem 10 integrally formed with the case 2 by vulcanization. A rubber grommet 12 is provided, and one end of the antenna 11 is connected to the power supply line 6 of the signal processing circuit 4. 10 that it has to be secured within the valve hole in the washer 8 and a nut 9 of the wheel rim 1 and is characterized in.
【０００７】[0007]
【発明の実施の形態】以下、本発明の一実施形態を図面
に基づいて説明する。図１は、本発明のタイヤ空気圧警
報装置の縦断面図である。本発明のタイヤ空気圧警報装
置は、従来品と全く同様に、ホイールリム１内部に配置
される送信部７と、タイヤに空気を注入するためのバル
ブステム１０とで構成され、前記送信部７は、ケース２
の内部に、タイヤ空気圧を検出する圧力検知部３と、こ
の検出圧力を電波で車体側の受信機に信号を送信させる
ための信号処理回路４と、該信号処理回路４のマイコン
を作動させるための電池５とが内蔵されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a tire pressure alarm device of the present invention. The tire pressure warning device of the present invention comprises a transmission unit 7 disposed inside the wheel rim 1 and a valve stem 10 for injecting air into a tire, just like a conventional product, and the transmission unit 7 , Case 2
, A pressure detection unit 3 for detecting tire pressure, a signal processing circuit 4 for transmitting a signal of the detected pressure to a receiver on the vehicle body by radio waves, and a microcomputer for operating the signal processing circuit 4. Battery 5 is built in.
【０００８】本発明におけるタイヤ空気圧警報装置は、
従来品と比べて次の点が相違している。本発明のバルブ
ステム１０は、インサート成形により樹脂製のケース２
と一体的に設けられているものであり、図１の断面図で
示すごとく、ケース２の上面に位置する部分にストレー
ト状のグロメット挿入部１６が形成されている。The tire pressure warning device according to the present invention comprises:
The following points are different from the conventional product. The valve stem 10 of the present invention is made of a resin case 2 by insert molding.
As shown in the sectional view of FIG. 1, a straight grommet insertion portion 16 is formed in a portion located on the upper surface of the case 2.
【０００９】ゴム製のグロメット１２は、前記バルブス
テム１０をホイールリム１に装着したときに気密を保持
させると共に送信機のアンテナの機能を果すためのもの
であり、該グロメット１２は、内部にコイル状のアンテ
ナ１１がゴム加硫にて一体的に設けられている。また、
アンテナ１１の下端部は前記ケース２を通して前記信号
処理回路４の給電線６に接続されている。The rubber grommet 12 serves to maintain the airtightness when the valve stem 10 is mounted on the wheel rim 1 and to perform the function of the antenna of the transmitter. The grommet 12 has a coil inside. An antenna 11 is provided integrally by rubber vulcanization. Also,
The lower end of the antenna 11 is connected to the feed line 6 of the signal processing circuit 4 through the case 2.
【００１０】[0010]
【発明の効果】以上のように、本発明のタイヤ空気圧警
報装置は、絶縁体であるゴム製のグロメットの内部にコ
イル状のアンテナを専用に設けることにより、従来問題
となっていたバルブステムアンテナの効率の悪さ、つま
り、信号処理回路４から給電線６を介して出力する送信
電力を１００％放射電波にできず損失の大きかった問題
を防ぐことができ、送信電力を必要以上に上げる必要が
なくなり、電池の省電力化に寄与できる。また、シール
の構成部品であるグロメットに専用アンテナを内蔵して
いるため、それによる構造の複雑化はなく、専用アンテ
ナとして最も適したチューニングが可能となる。As described above, according to the tire pressure alarm device of the present invention, by providing a coil-shaped antenna exclusively inside a rubber grommet which is an insulator, a valve stem antenna which has been a problem in the prior art is provided. That is, the transmission power output from the signal processing circuit 4 via the power supply line 6 cannot be converted into 100% radiated radio waves, and the problem of large loss can be prevented. Therefore, it is necessary to increase the transmission power more than necessary. And can contribute to power saving of the battery. In addition, since the dedicated antenna is built in the grommet which is a component of the seal, the structure is not complicated by this, and tuning most suitable as the dedicated antenna can be performed.
【図１】 本発明のタイヤ空気圧警報装置の縦断面図。FIG. 1 is a longitudinal sectional view of a tire pressure alarm device of the present invention.
【図２】 従来のタイヤ空気圧警報装置の縦断面図。FIG. 2 is a longitudinal sectional view of a conventional tire pressure warning device.
１ ホイールリム ２ ケース ３ 圧力
検知部 ４ 信号処理回路 ５ 電池 ６ 給電
線 ７ 送信部 ８ 座金 ９ ナッ
ト １０ バルブステム １１ アンテナ １２ グ
ロメット １３ ベース １４ 溝 １５ Ｏ
リング １６ グロメット挿入部DESCRIPTION OF SYMBOLS 1 Wheel rim 2 Case 3 Pressure detection part 4 Signal processing circuit 5 Battery 6 Power supply line 7 Transmission part 8 Washer 9 Nut 10 Valve stem 11 Antenna 12 Grommet 13 Base 14 Groove 15 O
Ring 16 Grommet insertion part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) B60C 23/00 - 23/06 B60C 29/00 - 29/04 G01L 17/00 B60B 25/22 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) B60C 23/00-23/06 B60C 29/00-29/04 G01L 17/00 B60B 25/22
Claims (1)
と、この検出圧力を電波で車体側の受信機に信号を送信
させるための信号処理回路４と、該信号処理回路４のマ
イコンを作動させるための電池５とがケース２に収納さ
れた送信部７をホイールリム１内に配置し、前記ケース
２の上部にはタイヤに空気を注入するためのバルブステ
ム１０がインサート成形等により一体的に設けられたタ
イヤ空気圧警報装置において、 前記ケース２と一体的に形成されたバルブステム１０の
基部には、加硫にて内部にコイル状のアンテナ１１を一
体的に設けてなるゴム製のグロメット１２を配置させる
と共に、前記アンテナ１１の一端部を前記信号処理回路
４の給電線６に接続し、前記グロメット１２を介してバ
ルブステム１０をホイールリム１のバルブ孔に座金８お
よびナット９にて固着するようにしたことを特徴とする
タイヤ空気圧警報装置。 1. A pressure detector 3 for detecting a tire pressure.
And sends a signal to the receiver on the vehicle body using the detected pressure as a radio wave
A signal processing circuit 4 for performing the
The battery 5 for operating the icon is stored in the case 2.
The transmitter 7 placed in the wheel rim 1 is
2 has a valve stay for injecting air into the tire.
The timer in which the drum 10 is integrally provided by insert molding or the like
In the ear air pressure alarm device, the valve stem 10 formed integrally with the case 2
The base has a coiled antenna 11 inside by vulcanization.
The rubber grommet 12 provided physically is arranged.
And one end of the antenna 11 is connected to the signal processing circuit.
4 and connected via the grommet 12 to the power supply line 6.
Put the lube stem 10 into the valve hole of the wheel rim 1 with the washer 8
And nuts 9 for fixing.
Tire pressure warning device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22448296A JP3335846B2 (en) | 1996-08-06 | 1996-08-06 | Tire pressure warning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22448296A JP3335846B2 (en) | 1996-08-06 | 1996-08-06 | Tire pressure warning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1044726A JPH1044726A (en) | 1998-02-17 |
| JP3335846B2 true JP3335846B2 (en) | 2002-10-21 |
Family
ID=16814495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22448296A Expired - Fee Related JP3335846B2 (en) | 1996-08-06 | 1996-08-06 | Tire pressure warning device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3335846B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043184A1 (en) * | 2006-10-13 | 2008-04-17 | Smartire Systems Inc. | Methods and apparatus for mounting a sensor inside a wheel cavity |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005480A (en) * | 1998-05-20 | 1999-12-21 | Schrader-Bridgeport International, Inc. | Tire valve and associated tire pressure sending unit |
| JP4516187B2 (en) | 2000-06-06 | 2010-08-04 | 本田技研工業株式会社 | In-vehicle tire pressure detection device and cast wheel for mounting the same |
| JP2002154309A (en) | 2000-11-20 | 2002-05-28 | Honda Motor Co Ltd | Air pressure detecting device for wheel |
| JP4266278B2 (en) | 2000-11-20 | 2009-05-20 | 本田技研工業株式会社 | Wheel pressure detector |
| JP4558959B2 (en) * | 2000-11-20 | 2010-10-06 | 本田技研工業株式会社 | Wheel pressure detector mounting structure |
| JP4545958B2 (en) | 2001-01-24 | 2010-09-15 | 本田技研工業株式会社 | Wheel pressure detector |
| JP4554827B2 (en) | 2001-01-24 | 2010-09-29 | 本田技研工業株式会社 | Wheel pressure sensor mounting structure |
| JP4180802B2 (en) | 2001-01-30 | 2008-11-12 | 本田技研工業株式会社 | Tire pressure detector |
| JP2002225520A (en) | 2001-01-30 | 2002-08-14 | Honda Motor Co Ltd | Air pressure detection device for wheel |
| JP4620292B2 (en) * | 2001-06-22 | 2011-01-26 | 本田技研工業株式会社 | Tire pressure detector |
| US20050242937A1 (en) * | 2002-06-21 | 2005-11-03 | Bridgestone Corporation | Tired wheel with tire-information sending body, installation instrument and fixing instrument for tire-information sending body, and method of installing tire-information sending body |
| FR2866985B1 (en) * | 2004-02-27 | 2006-06-16 | Michelin Soc Tech | TRANSMITTING AND / OR RECEIVING DEVICE FOR MOUNTING ON A VEHICLE WHEEL, HOUSING OF SUCH A DEVICE |
| JPWO2006098265A1 (en) * | 2005-03-14 | 2008-08-21 | 株式会社ブリヂストン | Electronic device and tire |
| JP2008011385A (en) | 2006-06-30 | 2008-01-17 | Alps Electric Co Ltd | Antenna unit |
| KR100800516B1 (en) | 2007-06-22 | 2008-02-04 | 씨트론 주식회사 | Tire sensor valve |
| US8215162B2 (en) * | 2009-07-27 | 2012-07-10 | Eldec Corporation | Focused field antenna for passive RFID tire pressure sensor transponder |
| JP2010280389A (en) * | 2010-09-29 | 2010-12-16 | Honda Motor Co Ltd | Wheel pneumatic pressure sensor |
| FR3048156B1 (en) * | 2016-02-23 | 2019-11-15 | Continental Automotive France | ELECTRONIC MODULE HOUSING AND ELECTRONIC UNIT FOR MEASURING OPERATING PARAMETERS OF A VEHICLE WHEEL |
| US11745549B2 (en) * | 2017-08-21 | 2023-09-05 | Sram. Llc | Pressure sensing assembly for a bicycle wheel |
| JP7235848B2 (en) | 2020-05-29 | 2023-03-08 | 太平洋工業株式会社 | Connector and connector manufacturing method |
-
1996
- 1996-08-06 JP JP22448296A patent/JP3335846B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008043184A1 (en) * | 2006-10-13 | 2008-04-17 | Smartire Systems Inc. | Methods and apparatus for mounting a sensor inside a wheel cavity |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1044726A (en) | 1998-02-17 |
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