JPH0526516Y2 - - Google Patents
Info
- Publication number
- JPH0526516Y2 JPH0526516Y2 JP1984194444U JP19444484U JPH0526516Y2 JP H0526516 Y2 JPH0526516 Y2 JP H0526516Y2 JP 1984194444 U JP1984194444 U JP 1984194444U JP 19444484 U JP19444484 U JP 19444484U JP H0526516 Y2 JPH0526516 Y2 JP H0526516Y2
- Authority
- JP
- Japan
- Prior art keywords
- lead wire
- ring
- piezoelectric element
- shaped
- pressure sensor
- 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 - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 26
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 23
- 239000011347 resin Substances 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 229920002379 silicone rubber Polymers 0.000 description 5
- 239000004945 silicone rubber Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 2
- UUAGAQFQZIEFAH-UHFFFAOYSA-N chlorotrifluoroethylene Chemical group FC(F)=C(F)Cl UUAGAQFQZIEFAH-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- -1 ethylene-hexafluoropropylene Chemical group 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Measuring Fluid Pressure (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本願の考案は、内燃機関の爆発燃焼やノツキン
グ、燃料噴射時に発生する圧力変動を検出して、
点火時期を調整したり、燃料噴射を制御したりし
て内燃機関の燃焼状態を最適に維持するために、
エンジンのシリンダブロツクとシリンダヘツドと
を結合するボルトの座金部やシリンダヘツド座面
とスパークプラグのガスケツト座面との間に挿着
して、エンジンシリンダ内の圧力変動を圧電素子
によつて検出するガスケツト型圧力センサーに関
し、更に詳しくは、圧電素子を用いた圧力センサ
ー本体に於ける電極と圧電素子の金属ケース収納
構造及び出力取り出し用リード線とその保護構造
の改良に係わるものである。[Detailed description of the invention] (Industrial application field) The invention of the present application detects pressure fluctuations that occur during explosive combustion, knocking, and fuel injection in an internal combustion engine.
In order to maintain optimal combustion conditions in an internal combustion engine by adjusting ignition timing and controlling fuel injection,
It is inserted between the washer of the bolt that connects the cylinder block and cylinder head of the engine, or the seat surface of the cylinder head and the gasket seat of the spark plug, and detects pressure fluctuations within the engine cylinder using a piezoelectric element. The present invention relates to a gasket type pressure sensor, and more specifically, relates to an improvement in a metal case storage structure for an electrode and a piezoelectric element in a pressure sensor body using a piezoelectric element, and an output lead wire and its protection structure.
（従来の技術）
従来から用いられていたこの種の圧力センサー
としては、第２図にその要部を示すように、平た
い環状に形成された内側電極板２を２枚の圧電素
子３，３の間に挟んで重ね合わせた上下両面に外
側電極板４，４を配して積層した圧電素子積層体
５を、環状の金属ケース６内に収納して圧力セン
サー本体１を構成し、内側電極板２に接続された
出力取り出し用リード線（以下単にリード線とい
う）７を金属ケース６の一側面に設けたリード線
導出孔６ａから導出した形式のものが知られてい
る。(Prior Art) As shown in FIG. 2, a pressure sensor of this kind that has been used in the past has an inner electrode plate 2 formed in a flat annular shape and two piezoelectric elements 3, 3. A piezoelectric element laminate 5, which is stacked with outer electrode plates 4, 4 placed on the upper and lower surfaces sandwiched between them, is housed in an annular metal case 6 to constitute the pressure sensor body 1, and the inner electrode A type is known in which an output lead wire (hereinafter simply referred to as lead wire) 7 connected to the plate 2 is led out from a lead wire outlet hole 6a provided on one side of the metal case 6.
そして、上記出力取り出し用リード線７の金属
ケース６からの立ち上がり部分は、金属ケース６
外周の一側面に設けたリード線導出孔６ａ部に溶
接により立設した金属保護パイプ８で覆われた構
造をしたものが用いられているが、この様な圧力
センサーは、高温になるエンジンヘツドに取り付
けられるので出力取り出し用リード線７を耐熱絶
縁材９により絶縁する必要があるので、リード線
にシリコーンゴムを被覆したものをもちいたり、
金属保護パイプ８とリード線７との間にシリコー
ンゴムを充填したりして絶縁を行つていた。 The rising portion of the output lead wire 7 from the metal case 6 is connected to the metal case 6.
A pressure sensor is used in which the lead wire outlet hole 6a provided on one side of the outer periphery is covered with a metal protection pipe 8 that is welded upright. Since the output lead wire 7 must be insulated with a heat-resistant insulating material 9, the lead wire may be coated with silicone rubber.
Insulation was performed by filling silicone rubber between the metal protection pipe 8 and the lead wire 7.
（考案が解決しようとする課題）
しかしながら、上記のような従来の圧力センサ
ーの絶縁構造によるものは、シリコーンゴムを充
填する構造のものにあつては充填に手間がかか
り、シリコーンゴムを被覆したリード線を用いる
場合にはリード線の端部を一々口出ししなければ
ならず、かつシリコーンゴムが柔軟で、表面の摩
擦係数が大きいので、小さい孔径の金属保護パイ
プ内にリード線を挿通させるのが困難である等の
為に、圧力センサーの組立時における作業効率が
悪く、圧力センサーの量産性が阻害され、コスト
も高くなる等の問題があつた。(Problem to be solved by the invention) However, the conventional pressure sensors with an insulating structure as described above are filled with silicone rubber, which takes time and effort to fill, and the lead covered with silicone rubber is difficult to fill. When using wires, the ends of the lead wires must be exposed one by one, and silicone rubber is flexible and has a large surface friction coefficient, so it is best to insert the lead wires into a metal protective pipe with a small hole diameter. Because of the difficulty, there were problems such as poor work efficiency during assembly of the pressure sensor, hindering mass production of pressure sensors, and increasing costs.
（課題を解決するための手段）
本考案は、上記したような問題点を解決するた
めに、圧力センサーからの出力取り出し用リード
線を、テトラフルオロエチレン樹脂、クロロトリ
フルオロエチレン樹脂、もしくはテトラフルオロ
エチレン−ヘキサフルオロプロピレン樹脂等のフ
ツ素樹脂製のチユーブ（以下、フツ素樹脂チユー
ブという）で被つて絶縁するようにしたものであ
る。(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention aims to replace the lead wire for taking out the output from the pressure sensor with tetrafluoroethylene resin, chlorotrifluoroethylene resin, or tetrafluoroethylene resin. It is insulated by covering it with a tube made of fluororesin such as ethylene-hexafluoropropylene resin (hereinafter referred to as fluororesin tube).
このように、リード線を上記のフツ素樹脂チュ
ーブを用いて絶縁することにより、適当な硬さと
小さい表面摩擦係数とを有するリード線を得るこ
とができて、金属保護パイプ内へのリード線の挿
入が容易となり、圧力センサーの組立て時に於け
る作業性を向上させると共に小型で量産性に適し
たものとなして、コストの低減を図るものであ
る。 In this way, by insulating the lead wire with the above-mentioned fluororesin tube, it is possible to obtain a lead wire with appropriate hardness and a small coefficient of surface friction, which makes it possible to insulate the lead wire into the metal protection pipe. This facilitates insertion, improves workability during assembly of the pressure sensor, and makes it compact and suitable for mass production, thereby reducing costs.
（実施例）
本願考案の圧力センサー本体に於ける電極と圧
電素子の金属ケース収納構造及び出力取り出し用
リード線の絶縁保護構造について、実施例に基づ
いて図面を参照しつつ説明する。第１図に要部の
縦断面を示すように、本願の考案は、平たい環状
に形成された内側電極板２を２枚の圧電素子３，
３の間に挟んで重ね合わせた上下両面に、負電極
となる外側電極板４，４を配して積層した圧電素
子積層体５を、環状の金属ケース６内に収納して
圧力センサー本体１を構成すると共に該金属ケー
ス６の外周に設けたリード線導出孔６ａに略Ｌ字
状をした金属パイプ８が溶接され、前記圧電素子
積層体５の内側電極板２に接続された0.3〜0.1mm
φの金属線からなる出力取り出し用リード線７を
金属ケース６の一側面に設けたリード線導出孔６
ａから導出してフツ素樹脂チユーブに挿通して絶
縁被覆したものを、略Ｌ字状をした金属保護パイ
プ内に挿通して導出された構造とする。(Example) A metal case storage structure for electrodes and a piezoelectric element and an insulation protection structure for an output lead wire in a pressure sensor main body of the present invention will be described based on an example with reference to the drawings. As shown in FIG. 1, which shows a vertical cross section of the main part, the invention of the present application connects an inner electrode plate 2 formed in a flat annular shape to two piezoelectric elements 3,
A piezoelectric element laminate 5, which is stacked with outer electrode plates 4, 4 serving as negative electrodes arranged on the upper and lower surfaces sandwiched between the layers 3 and 3, is housed in an annular metal case 6, and the pressure sensor body 1 is assembled. A substantially L-shaped metal pipe 8 is welded to a lead wire outlet hole 6a provided on the outer periphery of the metal case 6, and is connected to the inner electrode plate 2 of the piezoelectric element laminate 5. mm
A lead wire outlet hole 6 in which an output lead wire 7 made of a metal wire of φ is provided on one side of the metal case 6.
It has a structure in which it is led out from a, inserted into a fluororesin tube and coated with insulation, and then inserted into a substantially L-shaped metal protection pipe and led out.
尚、本願の実施例に於ける上記した以外の構造
は、第２図に示した従来例と同様であるから図示
及び説明するのを省略する。 It should be noted that the structure of the embodiment of the present application other than those described above is the same as that of the conventional example shown in FIG. 2, so illustration and description thereof will be omitted.
（考案の効果）
本考案による圧力センサーは、以上の説明から
明らかなとおり、センサー全体を包被する環状の
金属ケースの円周外面の一側面に、リード線導出
用金属保護パイプを設けた構造において、センサ
ーの内側電極に電気的に接続したリード線を、外
側電極に電気的に接続され、導電体をかねる金属
保護パイプに対して、耐熱性、絶縁性及び強度に
優れ、摩擦係数の小さいフツ素樹脂チユーブを用
いてリード線を絶縁し組立ているので、金属保護
パイプは略Ｌ字形に屈曲しているにもかかわらず
フツ素樹脂チユーブはすべりがよいので、この中
に挿入が容易で作業効率が良く、センサーの量産
性が向上し、従来の組立上の問題点を解決し、金
属ケースでセンサー全体を包被していることと相
まつて製品の信頼性にも優れているガスケツト型
圧力センサーを提供することができる。(Effect of the invention) As is clear from the above explanation, the pressure sensor according to the invention has a structure in which a metal protection pipe for leading out the lead wire is provided on one side of the circumferential outer surface of the annular metal case that covers the entire sensor. In this case, the lead wire electrically connected to the inner electrode of the sensor is connected to the metal protection pipe that is electrically connected to the outer electrode and serves as a conductor. The lead wires are insulated and assembled using a fluorine resin tube, so even though the metal protection pipe is bent into a roughly L shape, the fluorine resin tube has good sliding properties, making it easy to insert into the pipe and work easily. The gasket type pressure sensor is highly efficient, improves sensor mass production, solves the problems associated with conventional assembly, and has excellent product reliability due to the fact that the entire sensor is covered with a metal case. sensors can be provided.
第１図は本考案ガスケツト型圧力センサーの要
部を示す実施例の縦断面図、第２図はガスケツト
型圧力センサーの従来例を示す縦断面図である。
１，１′……圧力センサー、２……内側電極、
３……圧電素子、４……外側電極、５……積層
体、６……金属ケース、６ａ……導出孔、７……
リード線、８……金属保護パイプ、１０……フツ
素樹脂チユーブ。
FIG. 1 is a longitudinal cross-sectional view of an embodiment of the gasket type pressure sensor of the present invention showing the essential parts, and FIG. 2 is a vertical cross-sectional view of a conventional example of the gasket type pressure sensor. 1, 1'...pressure sensor, 2...inner electrode,
3... Piezoelectric element, 4... Outer electrode, 5... Laminated body, 6... Metal case, 6a... Output hole, 7...
Lead wire, 8...metal protection pipe, 10...fluororesin tube.
Claims (1)
た圧電素子及び外側電極をそれぞれ配して成る環
状の圧電素子積層体の略全面を覆うように収納す
る環状の金属ケースの円周外面の一側面に設けた
リード線導出用開孔部に、略Ｌ字形をした金属保
護パイプを溶接により立設すると共に、内側電極
に接続された出力取り出し用リード線が前記金属
保護パイプ内に挿着されたフツ素樹脂チユーブで
被覆絶縁されたことを特徴とするガスケツト型圧
力センサー。 One side of the circumferential outer surface of a ring-shaped metal case that houses a ring-shaped piezoelectric element laminate, which is formed by disposing a ring-shaped flat plate piezoelectric element and an outer electrode on both sides of an ring-shaped flat inner electrode, so as to cover substantially the entire surface of the ring-shaped piezoelectric element stack. A substantially L-shaped metal protection pipe was welded to stand in the lead wire lead-out opening provided in the lead wire, and an output lead wire connected to the inner electrode was inserted into the metal protection pipe. A gasket type pressure sensor characterized by being coated and insulated with a fluororesin tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984194444U JPH0526516Y2 (en) | 1984-12-24 | 1984-12-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984194444U JPH0526516Y2 (en) | 1984-12-24 | 1984-12-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61110142U JPS61110142U (en) | 1986-07-12 |
| JPH0526516Y2 true JPH0526516Y2 (en) | 1993-07-05 |
Family
ID=30751897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984194444U Expired - Lifetime JPH0526516Y2 (en) | 1984-12-24 | 1984-12-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0526516Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0624754Y2 (en) * | 1987-02-12 | 1994-06-29 | 日産自動車株式会社 | Washer pressure sensor |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59933B2 (en) * | 1975-06-13 | 1984-01-09 | 株式会社日立製作所 | Color: Brown |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5865542U (en) * | 1981-10-28 | 1983-05-04 | 日本特殊陶業株式会社 | Piezoelectric pickup for internal combustion engines |
| JPS59933U (en) * | 1982-06-25 | 1984-01-06 | 日本特殊陶業株式会社 | Piezoelectric pressure sensor for internal combustion engines |
-
1984
- 1984-12-24 JP JP1984194444U patent/JPH0526516Y2/ja not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59933B2 (en) * | 1975-06-13 | 1984-01-09 | 株式会社日立製作所 | Color: Brown |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61110142U (en) | 1986-07-12 |
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