JP2000177340A - Transmitter for tire inflation pressure alarm - Google Patents
Transmitter for tire inflation pressure alarmInfo
- Publication number
- JP2000177340A JP2000177340A JP10358316A JP35831698A JP2000177340A JP 2000177340 A JP2000177340 A JP 2000177340A JP 10358316 A JP10358316 A JP 10358316A JP 35831698 A JP35831698 A JP 35831698A JP 2000177340 A JP2000177340 A JP 2000177340A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- valve
- transmitter
- cap
- coil
- 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.)
- Granted
Links
- 239000002184 metal Substances 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 4
- DOSMHBDKKKMIEF-UHFFFAOYSA-N 2-[3-(diethylamino)-6-diethylazaniumylidenexanthen-9-yl]-5-[3-[3-[4-(1-methylindol-3-yl)-2,5-dioxopyrrol-3-yl]indol-1-yl]propylsulfamoyl]benzenesulfonate Chemical compound C1=CC(=[N+](CC)CC)C=C2OC3=CC(N(CC)CC)=CC=C3C(C=3C(=CC(=CC=3)S(=O)(=O)NCCCN3C4=CC=CC=C4C(C=4C(NC(=O)C=4C=4C5=CC=CC=C5N(C)C=4)=O)=C3)S([O-])(=O)=O)=C21 DOSMHBDKKKMIEF-UHFFFAOYSA-N 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 230000005855 radiation Effects 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Measuring Fluid Pressure (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
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の送信機に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire pressure alarm device for detecting an abnormality in tire pressure and alerting a driver in a vehicle, and more particularly to a tire pressure alarm device capable of improving the antenna efficiency of a transmitter. It concerns the transmitter.
【０００２】[0002]
【従来の技術】本願出願人は、特願平９−３６４６２２
号にて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
を出願している。図２は、従来のタイヤ空気圧警報装置
の送信機を示す縦断面図であり、この送信機は、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１７とで構成されている。2. Description of the Related Art The present applicant has filed a Japanese Patent Application No. 9-364622.
A tire pressure alarm device which detects that the air pressure of a vehicle tire has decreased by the above-mentioned issue and notifies the driver of the decrease has been filed. FIG. 2 is a longitudinal sectional view showing a transmitter of the conventional tire pressure alarm device. This transmitter is composed of a transmitter 7 arranged inside the wheel rim 1 and a valve stem 17 for injecting air into the tire. It is composed of
【０００３】前記送信部７は、ケース１８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、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の出力を、給
電線６を介してバルブステム１７と導通させている。な
お、前記バルブステム１７は、グロメット１９、２０、
座金２１を介してナット２２にてホイールリム１に固定
されている。The transmitting unit 7 includes a pressure detecting unit 3 for detecting tire pressure in a case 18, a signal processing circuit 4 for transmitting a signal of the detected pressure to a receiver on the vehicle body side by radio waves, A battery 5 for operating the microcomputer is built in. Further, the output of the signal processing circuit 4 is conducted to the valve stem 17 via the power supply line 6. The valve stem 17 has grommets 19, 20,
It is fixed to the wheel rim 1 by a nut 22 via a washer 21.
【０００４】前記バルブステムのおねじ１６には、ナッ
ト２７と絶縁材にて被覆されたコイル２８とからなるコ
イル状のアンテナ２９をねじ止めにより固定し、前記信
号処理回路４の電波出力が、バルブステム１７を介して
コイル状のアンテナ２９から放射するようにしていた。A coil-shaped antenna 29 comprising a nut 27 and a coil 28 covered with an insulating material is fixed to the male screw 16 of the valve stem by screwing, and the radio wave output of the signal processing circuit 4 is Radiation is emitted from the coiled antenna 29 via the valve stem 17.
【０００５】[0005]
【発明が解決しようとする課題】ところが上述のごとく
ナット２７と絶縁材にて被覆されたコイル２４とからな
るコイル状のアンテナ２９の場合、ホイールリムからの
高さが低いため、アンテナの放射効率の面で不利とな
り、ホイールリム装着時の実際の放射電界は弱く、シス
テムの送受信性を高めるために、受信アンテナを送信
機、つまり各タイヤの近傍に設置することが必要とな
る。そのため、タイヤ周辺の厳しい環境に耐える受信ア
ンテナとするのには構造上かなりコストが上がってしま
う。However, as described above, in the case of the coil-shaped antenna 29 composed of the nut 27 and the coil 24 covered with the insulating material, since the height from the wheel rim is low, the radiation efficiency of the antenna is low. However, the actual radiated electric field when the wheel rim is mounted is weak, and it is necessary to install a receiving antenna near the transmitter, that is, in the vicinity of each tire, in order to enhance the transmission and reception of the system. For this reason, it is structurally very expensive to provide a receiving antenna that can withstand the severe environment around the tire.
【０００６】また、ホイールのデザインによっては、バ
ルブステムが完全に隠れてしまうものがあり、その場合
の放射効率の低下を防ぐために、ホイールデザインにど
うしても制約を設ける必要があった。In some wheel designs, the valve stem is completely hidden, and in order to prevent a reduction in radiation efficiency in such a case, it is necessary to impose restrictions on the wheel design.
【０００７】その対策として、コイル状のアンテナ２９
をバルブステム１７の先端部に移動させて、ホイールリ
ムからの高さを高くする手段が考えられるが、先端部に
位置するとタイヤにエアーを注入する際に使う治具が使
えなくなり、タイヤバルブとしての機能、製品性の面で
問題となる。As a countermeasure, a coiled antenna 29
There is a means to increase the height from the wheel rim by moving the to the tip of the valve stem 17, but if it is located at the tip, the jig used to inject air into the tire cannot be used, and as a tire valve This is a problem in terms of functions and productivity.
【０００８】[0008]
【課題を解決するための手段】本発明は、上記のような
アンテナのホイールからの高さによる効率の低下と、ホ
イールデザインの影響で放射効率が低下し、実際の放射
電界が弱くなるのを防ぐと同時に、さらに効率よく電波
を放出するためになされたもので、バルブステムの先端
に位置するタイヤバルブキャップの中に、コイル状のア
ンテナを設けることによって、効率よく電波を放出し、
ホイールのデザインの影響を最小限にして、送信性能を
著しく向上させることができるタイヤ空気圧警報装置の
提供を目的とするものである。SUMMARY OF THE INVENTION The present invention is directed to the reduction of the efficiency due to the height of the antenna from the wheel as described above, the reduction of the radiation efficiency due to the influence of the wheel design, and the reduction of the actual radiated electric field. At the same time as preventing, it is made to emit radio waves more efficiently.By providing a coiled antenna in the tire valve cap located at the tip of the valve stem, it efficiently emits radio waves,
It is an object of the present invention to provide a tire pressure warning device capable of significantly improving transmission performance by minimizing the influence of wheel design.
【０００９】すなわち、本発明は、タイヤに空気を入れ
るタイヤバルブと、タイヤ内の空気圧等を検出して電波
で車両側に送信する送信部が一体となったタイヤ空気圧
警報装置の送信機において、前記タイヤバルブのバルブ
ステム１７と、該バルブステム１７と一体化した送信部
７と、内面にめねじを設けた金属製のキャップ２３と該
キャップ２３と導通させたコイル２４とをインサート成
形してなるコイル内蔵のバルブキャップ３０とにより送
信機を構成し、前記バルブステム１７の先端にバルブキ
ャップ３０を固着することにより、コイル２４から電波
を放射するようにしたことを特徴とするタイヤ空気圧警
報装置の送信機である。That is, the present invention relates to a transmitter of a tire pressure alarm device in which a tire valve for injecting air into a tire and a transmitting unit for detecting air pressure and the like in the tire and transmitting the radio wave to the vehicle side are integrated. The valve stem 17 of the tire valve, the transmitting portion 7 integrated with the valve stem 17, a metal cap 23 having an internal thread on its inner surface, and a coil 24 electrically connected to the cap 23 are insert-molded. A tire pressure alarm device characterized in that a transmitter is constituted by a valve cap 30 having a built-in coil, and a radio wave is radiated from the coil 24 by fixing the valve cap 30 to the tip of the valve stem 17. Of the transmitter.
【００１０】[0010]
【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、本発明に係るタイヤ空気
圧警報装置の送信機の縦断面図である。本発明のタイヤ
空気圧警報装置は、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
１７とコイル内蔵のバルブキャップ３０とにより構成さ
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 transmitter of a tire pressure warning device according to the present invention. The tire pressure warning device of the present invention includes a transmission unit 7 arranged inside the wheel rim 1, a valve stem 17 for injecting air into a tire, and a valve cap 30 with a built-in coil.
【００１１】前記送信部７は、従来品と同様に、ケース
１８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、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は、電波の出力回路４ａと、バルブステム１７、
コイル２４へのインピーダンスマッチング回路４ｂを持
っている。The transmission unit 7 includes a pressure detection unit 3 for detecting tire pressure inside a case 18 similarly to the conventional product.
And a signal processing circuit 4 for transmitting a signal from the detected pressure to a receiver on the vehicle body by radio waves, and a battery 5 for operating the microcomputer. The signal processing circuit 4 includes a radio wave output circuit 4a, a valve stem 17,
It has an impedance matching circuit 4b for the coil 24.
【００１２】前記バルブステム１７は、従来品と同様
に、上部におねじ１６を備え、下方部分にはインサート
成形により送信部７を収納させるケース１８が一体成形
されると共にその下端部がケース１８内に臨むごとく下
方に突出している。そして、前記バルブステム１７の下
端部にはＥリング２６が嵌着され、該Ｅリング２６には
給電線６がはんだ付けされその一端部が前記信号処理回
路４のインピーダンスマッチング回路４ｂと接続されて
いる。なお、前記Ｅリング２６を省略して、例えば、給
電線６の端部を前記バルブステム１７に直接はんだ付け
してもよい。The valve stem 17 is provided with a screw 16 on the upper part and a case 18 for accommodating the transmitting part 7 is formed integrally by insert molding on the lower part, and the lower end is formed on the case 18 as in the conventional valve stem. It protrudes downward as if facing inside. An E-ring 26 is fitted to the lower end of the valve stem 17, the power supply line 6 is soldered to the E-ring 26, and one end thereof is connected to the impedance matching circuit 4 b of the signal processing circuit 4. I have. The E-ring 26 may be omitted and the end of the power supply line 6 may be directly soldered to the valve stem 17, for example.
【００１３】また、本発明のバルブステム１７は、ホイ
ールリム１の内側よりバルブ孔に挿通され、グロメット
１９、２０および座金２１を介してナット２２にてホイ
ールリム１に固定されるようになっているが、これも従
来品と同じである。The valve stem 17 of the present invention is inserted into the valve hole from the inside of the wheel rim 1 and is fixed to the wheel rim 1 with nuts 22 via grommets 19 and 20 and washers 21. However, this is also the same as the conventional product.
【００１４】本発明品と従来品との差異は、新規なコイ
ル内蔵のバルブキャップ３０を用いた点にある。コイル
内蔵のバルブキャップ３０は、インサート成形によって
作られるもので、該バルブキャップ３０は、内面にめね
じを設けた金属製のキャップ２３と絶縁材にて被覆され
たコイル２４とにより構成され、バルブキャップ３０の
めねじをバルブステム１７のおねじ１６にねじ込んで固
定されることにより、コイル２４とバルブステム１７が
導通するようになっている。The difference between the product of the present invention and the conventional product is that a novel valve cap 30 with a built-in coil is used. The valve cap 30 with a built-in coil is made by insert molding. The valve cap 30 is composed of a metal cap 23 provided with an internal thread on the inner surface and a coil 24 covered with an insulating material. The female thread of the cap 30 is screwed into the external thread 16 of the valve stem 17 and fixed, so that the coil 24 and the valve stem 17 are conducted.
【００１５】[0015]
【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、バルブステム１７を導通経路とし、このバル
ブステム１７の先端部のおねじ１６にねじ止めされるコ
イル状のアンテナ内蔵のバルブキャップを設けたもので
あるため、アンテナのホイールからの高さが高くなり、
効率よく電波を放出し、送信性能を著しく向上させるこ
とができる。また、コイル内蔵のバルブキャップ３０
は、新規な構成といえども、従来のバルブキャップに金
属製のキャップ２３とコイル２４を付加したものである
から、従来品に比べて大きなコストアップとなるような
ことがない。As described above, in the tire pressure warning device of the present invention, the valve stem 17 is used as a conduction path, and the coil-shaped valve with a built-in antenna is screwed to the external thread 16 at the tip of the valve stem 17. Because the cap is provided, the height of the antenna from the wheel increases,
Radio waves can be efficiently emitted and transmission performance can be significantly improved. The valve cap 30 with a built-in coil
Has a metal cap 23 and a coil 24 added to a conventional valve cap, even though it has a new configuration, so that there is no significant increase in cost as compared with conventional products.
【図１】 本発明に係るタイヤ空気圧警報装置の送信機
の縦断面図。FIG. 1 is a longitudinal sectional view of a transmitter of a tire pressure warning device according to the present invention.
【図２】 従来のタイヤ空気圧警報装置の送信機の縦断
面図。FIG. 2 is a longitudinal sectional view of a transmitter of a conventional tire pressure warning device.
１ ホイールリム ３ 圧力検知部 ４
信号処理回路 ４ａ 出力回路 ４ｂ マッチング回路 ５
電池 ６ 給電線 ７ 送信部 １６
おねじ １７ バルブステム １８ ケース １
９、２０ グロメット ２１ 座金 ２２ ナット ２
３ 金属製のキャップ２３ ２４ コイル ２５ パッキン ２
６ Ｅリング ２７ ナット ２８ コイル ２
９ コイル状のアンテナ ３０ コイル内蔵のバルブキャップ1 wheel rim 3 pressure detector 4
Signal processing circuit 4a Output circuit 4b Matching circuit 5
Battery 6 Power supply line 7 Transmitter 16
Male thread 17 Valve stem 18 Case 1
9, 20 Grommet 21 Washer 22 Nut 2
3 Metal cap 23 24 Coil 25 Packing 2
6 E-ring 27 Nut 28 Coil 2
9 Coiled antenna 30 Coil built-in valve cap
Claims (1)
イヤ内の空気圧等を検出して電波で車両側に送信する送
信部が一体となったタイヤ空気圧警報装置の送信機にお
いて、 前記タイヤバルブのバルブステム１７と、該バルブステ
ム１７と一体化した送信部７と、内面にめねじを設けた
金属製のキャップ２３と該キャップ２３と導通させたコ
イル２４とをインサート成形してなるコイル内蔵のバル
ブキャップ３０とにより送信機を構成し、前記バルブス
テム１７の先端にバルブキャップ３０を固着することに
より、コイル２４から電波を放射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の送信機。1. A transmitter for a tire pressure warning device, comprising: a tire valve for injecting air into a tire; and a transmitter for detecting air pressure and the like in the tire and transmitting the detected signal to a vehicle by radio waves. A built-in coil formed by insert-molding a valve stem 17, a transmitting section 7 integrated with the valve stem 17, a metal cap 23 having an internal thread on its inner surface, and a coil 24 electrically connected to the cap 23. A transmitter for a tire pressure alarm device, wherein a transmitter is constituted by the valve cap 30 and radio waves are emitted from the coil 24 by fixing the valve cap 30 to the tip of the valve stem 17.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35831698A JP3354887B2 (en) | 1998-12-17 | 1998-12-17 | Tire pressure warning device transmitter |
| US09/439,681 US6340929B1 (en) | 1998-11-19 | 1999-11-15 | Transmitter and external controller of tire inflation pressure monitor |
| EP99122071A EP1002670B1 (en) | 1998-11-19 | 1999-11-16 | Transmitter and external controller of tire inflation pressure monitor |
| DE69930039T DE69930039T2 (en) | 1998-11-19 | 1999-11-16 | Transmitter and external regulator for a tire pressure monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35831698A JP3354887B2 (en) | 1998-12-17 | 1998-12-17 | Tire pressure warning device transmitter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2000177340A true JP2000177340A (en) | 2000-06-27 |
| JP3354887B2 JP3354887B2 (en) | 2002-12-09 |
Family
ID=18458673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35831698A Expired - Fee Related JP3354887B2 (en) | 1998-11-19 | 1998-12-17 | Tire pressure warning device transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3354887B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2405931A (en) * | 2000-09-08 | 2005-03-16 | Automotive Tech Int | Tyre pressure and/or temperature sensor |
| WO2006098265A1 (en) * | 2005-03-14 | 2006-09-21 | Bridgestone Corporation | Electronic device and tire |
| WO2009057214A1 (en) * | 2007-11-01 | 2009-05-07 | Renesas Technology Corp. | Automobile control system and valve |
| US8291756B2 (en) | 2007-12-17 | 2012-10-23 | Opus Project Management Limited | Measuring tyre pressure |
-
1998
- 1998-12-17 JP JP35831698A patent/JP3354887B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2405931A (en) * | 2000-09-08 | 2005-03-16 | Automotive Tech Int | Tyre pressure and/or temperature sensor |
| GB2405931B (en) * | 2000-09-08 | 2005-04-27 | Automotive Tech Int | Vehicle wireless sensing and communication system |
| WO2006098265A1 (en) * | 2005-03-14 | 2006-09-21 | Bridgestone Corporation | Electronic device and tire |
| US7642905B2 (en) | 2005-03-14 | 2010-01-05 | Bridgestone Corporation | Electronic device and tyre |
| WO2009057214A1 (en) * | 2007-11-01 | 2009-05-07 | Renesas Technology Corp. | Automobile control system and valve |
| US8291756B2 (en) | 2007-12-17 | 2012-10-23 | Opus Project Management Limited | Measuring tyre pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3354887B2 (en) | 2002-12-09 |
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