JPH09145670A - Connector and electrical joint structure in connector type oxygen sensor - Google Patents
Connector and electrical joint structure in connector type oxygen sensorInfo
- Publication number
- JPH09145670A JPH09145670A JP7305977A JP30597795A JPH09145670A JP H09145670 A JPH09145670 A JP H09145670A JP 7305977 A JP7305977 A JP 7305977A JP 30597795 A JP30597795 A JP 30597795A JP H09145670 A JPH09145670 A JP H09145670A
- Authority
- JP
- Japan
- Prior art keywords
- connector
- joint
- oxygen sensor
- joint parts
- terminal
- 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.)
- Pending
Links
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、例えば、内燃機
関の空燃比制御を行うために燃焼ガス雰囲気中の酸素濃
度を検出するコネクタ式酸素センサにおいて、そのコネ
クタの電気的接合構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector type oxygen sensor for detecting the oxygen concentration in a combustion gas atmosphere for controlling an air-fuel ratio of an internal combustion engine. .
【０００２】[0002]
【従来の技術】従来のコネクタ式酸素センサにおいて
は、基板上で燃焼ガス雰囲気側電極から延設されたリー
ド線に一方のリード端子が接続されているとともに、基
板上で大気側電極から延設されたリード線に他方のリー
ド端子が接続され、これらのリード端子にそれぞれター
ミナルが電気的に接合されるようになっている（例えば
実開平６ー１６８６１号公報参照）。2. Description of the Related Art In a conventional connector-type oxygen sensor, one lead terminal is connected to a lead wire extended from a combustion gas atmosphere side electrode on a substrate and extended from an atmosphere side electrode on the substrate. The other lead terminal is connected to the formed lead wire, and the terminal is electrically joined to each of these lead terminals (see, for example, Japanese Utility Model Laid-Open No. 6-16861).
【０００３】このように基板上で一連につながる電極と
リード線とリード端子は、良好なセンサ特性を得るため
に、通常、白金（Ｐｔ）等、触媒作用の高い材料を用い
てスクリーン印刷により形成されている。このような材
質のものは高価であるため、その使用量を減らす必要が
ある。また、前記電極等の厚さは、センサ特性に影響を
与えるため、通常、数μｍ程度の薄膜になっている。In order to obtain good sensor characteristics, the electrodes, lead wires and lead terminals connected in series on the substrate are usually formed by screen printing using a material having a high catalytic action such as platinum (Pt). Has been done. Since such a material is expensive, it is necessary to reduce the amount used. Further, since the thickness of the electrodes and the like affects the sensor characteristics, it is usually a thin film of about several μm.
【０００４】[0004]
【発明が解決しようとする課題】しかし、例えば、前記
リード端子とターミナルとの間の接合部に製造誤差等に
より隙間が生じると、この両接合部間が振動や熱収縮等
により相対動して摩耗劣化し、接触不良や断線を引き起
こすおそれがある。従って、このような摩耗等の劣化
は、酸素センサの耐久性を維持する上で好ましくない。However, for example, when a gap is created at the joint between the lead terminal and the terminal due to manufacturing error or the like, the two joints relatively move due to vibration or heat contraction. It may deteriorate due to wear and cause poor contact and disconnection. Therefore, such deterioration such as wear is not preferable in maintaining the durability of the oxygen sensor.
【０００５】上記の両接合部間不良は、コネクタ式酸素
センサ以外の各種コネクタにも生じ得る。本発明は、上
記接合部の耐久性を向上させることを目的にしている。The above-mentioned failure between both joints may occur in various connectors other than the connector type oxygen sensor. The present invention aims to improve the durability of the above-mentioned joint.
【０００６】[0006]
【課題を解決するための手段】第一発明のコネクタは、
雄型端子を備えたコネクタハウジングと、雌型端子を備
えたコネクタハウジングとを互いに嵌合させることによ
り電気的接合を行うものであって、前記両端子のうち少
なくとも一方の端子には非接合部よりも劣化度の小さい
接合部を設けた。The connector of the first invention comprises:
A connector housing having a male terminal and a connector housing having a female terminal are fitted to each other to perform electrical joining, and at least one of the two terminals is a non-joining portion. A joint portion having a smaller degree of deterioration than the above is provided.
【０００７】第二発明のコネクタ式酸素センサは、基板
上に設けたリード端子にターミナルを電気的に接合する
ものであって、前記リード端子には非接合部よりも劣化
度の小さい接合部を設けた。In the connector type oxygen sensor of the second invention, the terminal is electrically joined to the lead terminal provided on the substrate, and the lead terminal is provided with a joint portion having a lower degree of deterioration than the non-joint portion. Provided.
【０００８】[0008]
【発明の実施形態】以下、本発明の一実施形態にかかる
コネクタ式酸素センサを図面を参照して説明する。DETAILED DESCRIPTION OF THE INVENTION A connector type oxygen sensor according to an embodiment of the present invention will be described below with reference to the drawings.
【０００９】〔図１（ａ）に示す酸素センサの概略につ
いて〕 （雄型端子を備えたコネクタハウジング）ケース１内に
素子保持ユニット２が収納されて保持されている。この
素子保持ユニット２には酸素センサ素子基板３とヒータ
基板４とが互いに重合されて内蔵されている。[Outline of Oxygen Sensor Shown in FIG. 1 (a)] (Connector Housing with Male Terminal) A case 1 holds and holds an element holding unit 2. An oxygen sensor element substrate 3 and a heater substrate 4 are built in the element holding unit 2 by being superposed on each other.
【００１０】前記酸素センサ素子基板３の上端部表面に
は、図１（ｂ）に示す両リード端子５が並設されてい
る。図示しないが、一方のリード端子５は、酸素センサ
素子基板３の下端部表面に設けられた燃焼ガス雰囲気側
電極から延設されたリード線に接続されている。また、
他方のリード端子５は、酸素センサ素子基板３内の大気
孔でその下端部裏面に設けられた大気側電極から酸素セ
ンサ素子基板３の裏面及び表面に延設されたリード線に
接続されている。酸素センサ素子基板３の表面で一連に
つながる燃焼ガス雰囲気側電極とリード線とリード端子
５、並びに、酸素センサ素子基板３の裏面及び表面で一
連につながる大気側電極とリード線とリード端子５は、
それぞれ、白金（Ｐｔ）を用いてスクリーン印刷により
形成されている。On the surface of the upper end portion of the oxygen sensor element substrate 3, both lead terminals 5 shown in FIG. 1 (b) are juxtaposed. Although not shown, one lead terminal 5 is connected to a lead wire extending from the combustion gas atmosphere side electrode provided on the lower end surface of the oxygen sensor element substrate 3. Also,
The other lead terminal 5 is an atmospheric hole in the oxygen sensor element substrate 3 and is connected to a lead wire extending from the atmosphere-side electrode provided on the rear surface of the lower end portion to the rear surface and the front surface of the oxygen sensor element substrate 3. . The combustion gas atmosphere side electrode, the lead wire and the lead terminal 5 connected in series on the surface of the oxygen sensor element substrate 3 and the atmosphere side electrode, the lead wire and the lead terminal 5 connected in series on the back surface and the surface of the oxygen sensor element substrate 3 are ,
Each of them is formed by screen printing using platinum (Pt).
【００１１】前記ヒータ基板４の表面には、図１（ｃ）
に示す両リード端子６が並設されている。図示しない
が、この両リード端子６は、ヒータ基板４の表面の両リ
ード線を介してヒータ基板４内のヒータ線に接続されて
いる。この両リード線及び両リード端子６は、白金（Ｐ
ｔ）を用いてスクリーン印刷により形成されている。The surface of the heater substrate 4 is shown in FIG.
Both lead terminals 6 shown in FIG. Although not shown, the lead terminals 6 are connected to the heater wires in the heater substrate 4 via the lead wires on the surface of the heater substrate 4. Both lead wires and both lead terminals 6 are made of platinum (P
It is formed by screen printing using t).
【００１２】（雌型端子を備えたコネクタハウジング）
前記酸素センサ素子基板３及びヒータ基板４の上端部外
周でターミナルホルダ７がケース１内に挿嵌されてい
る。このホルダ７内には、両ターミナル８と両ターミナ
ル９とが嵌め込まれている。この各ターミナル８，９
は、酸素センサ素子基板３及びヒータ基板４の上端部外
周に嵌合されて各リード端子５，６に対し電気的に接合
されている。この各ターミナル８，９にはリード線１
０，１１が接続され、この各リード線１０，１１がケー
ス１の上端口部から外側に引き出されている。(Connector housing with female terminal)
A terminal holder 7 is fitted in the case 1 at the outer circumferences of the upper ends of the oxygen sensor element substrate 3 and the heater substrate 4. Both terminals 8 and 9 are fitted in the holder 7. These terminals 8 and 9
Are fitted to the outer circumferences of the upper ends of the oxygen sensor element substrate 3 and the heater substrate 4, and are electrically joined to the lead terminals 5 and 6. Lead wire 1 is attached to each of these terminals 8 and 9.
0 and 11 are connected, and the lead wires 10 and 11 are drawn out from the upper end opening of the case 1.
【００１３】〔図１（ｂ）（ｃ）に示すコネクタの電気
的接合構造について〕前記各リード端子５，６におい
て、各ターミナル８，９の接合部８ａ，９ａに対する接
合部５ａ，６ａは、非接合部５ｂ，６ｂ（接合部５ａ，
６ａ以外でその周囲）よりも劣化度が小さくなってい
る。[Electrical Joining Structure of Connector shown in FIGS. 1B and 1C] In the lead terminals 5 and 6, the joining portions 5a and 6a of the terminals 8 and 9 to the joining portions 8a and 9a are Non-joint parts 5b and 6b (joint part 5a,
Other than 6a, the degree of deterioration is smaller than that of the surrounding area.
【００１４】この劣化度を小さくするために、例えば、
本実施形態の接合部５ａ，６ａにおいては、下記のよう
に構成している。酸素センサ素子基板３及びヒータ基板
４の上端部表面に凹部１２，１３が形成され、この凹部
１２，１３にもスクリーン印刷により白金（Ｐｔ）が埋
め込まれている。従って、この接合部５ａ，６ａの厚さ
Ｔa は非接合部５ｂ，６ｂの厚さＴb （数μｍ程度の薄
膜）よりも大きくなる。接合部５ａ，６ａの表面と非接
合部５ｂ，６ｂの表面とは面一になっている。In order to reduce the degree of deterioration, for example,
The joint portions 5a and 6a of this embodiment are configured as follows. Recesses 12 and 13 are formed on the surfaces of the upper ends of the oxygen sensor element substrate 3 and the heater substrate 4, and platinum (Pt) is also embedded in the recesses 12 and 13 by screen printing. Therefore, the thickness T a of the joint portions 5a and 6a is larger than the thickness T b (a thin film of about several μm) of the non-joint portions 5b and 6b. The surfaces of the joint portions 5a and 6a and the surfaces of the non-joint portions 5b and 6b are flush with each other.
【００１５】本実施形態は下記（イ）〜（ハ）の特徴を
有する。 （イ） 接合部５ａ，６ａの厚さＴa のみを大きくし、
非接合部５ｂ，６ｂの厚さＴb はセンサ特性に悪影響を
与ない範囲で数μｍ程度の薄膜になっている。従って、
高価な材料の使用量を極力少なくして経費を節減するこ
とができる。また、良好なセンサ特性を得る。This embodiment has the following characteristics (a) to (c). (A) Increasing only the thickness T a of the joint portions 5a and 6a,
The thickness T b of the non-bonded portions 5b and 6b is a thin film of about several μm within the range where the sensor characteristics are not adversely affected. Therefore,
The amount of expensive materials used can be minimized to save costs. Also, good sensor characteristics are obtained.
【００１６】（ロ） 接合部５ａ，６ａの厚さＴa を通
常の厚み（非接合部５ｂ，６ｂの厚さＴb と同じく数μ
ｍ程度の薄膜）よりも大きくしたので、接合部５ａ，６
ａが種々の原因によりたとえ摩耗しても、接触不良や断
線を引き起こす程度の厚みまで進行しにくくなり、摩耗
による劣化を防止して十分な厚みを長期間保持すること
ができる。従って、接合部５ａ，６ａの耐摩耗性が向上
し、酸素センサの耐久性を維持することができる。ちな
みに、本実施形態において、「非接合部５ｂ，６ｂより
も劣化度の小さい接合部５ａ，６ａを設けた」とは、接
合部５ａ，６ａの厚さＴa を非接合部５ｂ，６ｂの厚さ
Ｔb よりも大きくしたことを意味する。(B) The thickness T a of the joint portions 5a and 6a is equal to the normal thickness (several μ as the thickness T b of the non-joint portions 5b and 6b).
Since it is larger than the thin film (about m), the joints 5a, 6
Even if a is worn due to various causes, it becomes difficult to proceed to a thickness that causes contact failure or disconnection, and deterioration due to wear can be prevented and a sufficient thickness can be maintained for a long time. Therefore, the wear resistance of the joint portions 5a and 6a is improved, and the durability of the oxygen sensor can be maintained. Incidentally, in the present embodiment, "unbonded portion 5b, small joints 5a degradation degree than 6b, provided 6a" is a junction 5a, of 6a thickness T a of the non-bonded portion 5b, 6b of the This means that the thickness is larger than T b .
【００１７】（ハ） 燃焼ガス雰囲気側電極とリード線
とリード端子５、並びに、大気側電極とリード線とリー
ド端子５は、それぞれ、同じ材質（白金）を用いてスク
リーン印刷により形成されているので、基板３に対する
それらの形成を行い易い。(C) The combustion gas atmosphere side electrode, the lead wire and the lead terminal 5, and the atmosphere side electrode, the lead wire and the lead terminal 5 are respectively formed by screen printing using the same material (platinum). Therefore, it is easy to form them on the substrate 3.
【００１８】前記実施形態以外にも下記（イ）〜（ハ）
のように構成してもよい。 （イ） 酸素センサ内のコネクタ以外に、各種コネクタ
に応用する。 （ロ） 前記接合部５ａ，６ａの劣化度を小さくするた
めに、次のように構成する。酸素センサ素子基板３及び
ヒータ基板４の上端部表面に前記凹部１２，１３を形成
することなく、従来の場合と同様に、白金（Ｐｔ）によ
るスクリーン印刷を行う。そして、接合部５ａ，６ａの
みで、二回目のスクリーン印刷を行い、一回目の印刷部
分の上に二回目の印刷部分を段差状に重ねる。従って、
この接合部５ａ，６ａの厚さは非接合部５ｂ，６ｂの厚
さよりも大きくなる。In addition to the above embodiment, the following (a) to (c)
It may be configured as follows. (B) In addition to the connector inside the oxygen sensor, it is applied to various connectors. (B) In order to reduce the degree of deterioration of the joint portions 5a and 6a, the following constitution is adopted. Screen printing with platinum (Pt) is performed in the same manner as in the conventional case without forming the recesses 12 and 13 on the upper surface of the oxygen sensor element substrate 3 and the heater substrate 4. Then, the second screen printing is performed only by the joining portions 5a and 6a, and the second printing portion is superposed on the first printing portion in a step shape. Therefore,
The thickness of the joint portions 5a and 6a is larger than the thickness of the non-joint portions 5b and 6b.
【００１９】（ハ） 接合部５ａ，６ａの材質を非接合
部５ｂ，６ｂの材質と比較して摩耗等の劣化に対し強い
ものにする。従って、「劣化度の小さい」とは、前記実
施形態のような厚みの変化やこの材質の変化を含め、広
義には、耐摩耗性や耐疲労性や耐熱性や耐腐食性など、
電気的接合に悪影響を及ぼす所定の耐久度について、接
合部５ａ，６ａが非接合部５ｂ，６ｂよりも優れている
ことを意味する。(C) The material of the joint portions 5a and 6a is made stronger than the material of the non-joint portions 5b and 6b against deterioration such as abrasion. Therefore, "small deterioration" includes a change in thickness and a change in this material as in the above embodiment, in a broad sense, wear resistance, fatigue resistance, heat resistance, corrosion resistance, etc.
It means that the joint portions 5a and 6a are superior to the non-joint portions 5b and 6b with respect to a predetermined durability that adversely affects the electrical joint.
【００２０】各実施形態から把握できる技術的思想（請
求項以外）を効果と共に記載する。 （イ） 請求項１または請求項２において、接合部の材
質と非接合部の材質を同じにし、かつ接合部の厚さを非
接合部の厚さよりも大きくした。従って、接合部の耐摩
耗性を向上させることができるとともに、接合部及び非
接合部の形成を容易に行うことができる。The technical idea (other than claims) that can be understood from each embodiment will be described together with the effects. (A) In Claim 1 or 2, the material of the joint portion and the material of the non-joint portion are made the same, and the thickness of the joint portion is made larger than the thickness of the non-joint portion. Therefore, it is possible to improve the wear resistance of the joint portion and easily form the joint portion and the non-joint portion.
【００２１】[0021]
【発明の効果】第一発明にかかるコネクタの電気的接合
構造、並びに、第二発明にかかるコネクタ式酸素センサ
の電気的接合構造によれば、接合部の耐久性を向上させ
ることができる。According to the electrical joint structure of the connector according to the first invention and the electrical joint structure of the connector-type oxygen sensor according to the second invention, the durability of the joint portion can be improved.
【図１】 （ａ）は本発明の一実施形態にかかるコネク
タ式酸素センサを示す縦断面図であり、（ｂ）及び
（ｃ）は（ａ）の酸素センサにおいて電気的接合部の部
分拡大図である。FIG. 1 (a) is a vertical cross-sectional view showing a connector-type oxygen sensor according to an embodiment of the present invention, and FIGS. It is a figure.
３…酸素センサ素子基板、４…ヒータ基板、５，６…リ
ード端子、５ａ，６ａ…接合部、５ｂ，６ｂ…非接合
部、８，９…ターミナル、８ａ，９ａ…接合部、Ｔa …
接合部厚さ、Ｔb …非接合部厚さ。3 ... Oxygen sensor element substrate, 4 ... Heater substrate, 5, 6 ... Lead terminals, 5a, 6a ... Joined portion, 5b, 6b ... Non-joined portion, 8, 9 ... Terminal, 8a, 9a ... Joined portion, Ta ...
Joined part thickness, Tb ... Non-bonded part thickness.
Claims (2)
と、雌型端子を備えたコネクタハウジングとを互いに嵌
合させることにより電気的接合を行うコネクタにおい
て、前記両端子のうち少なくとも一方の端子には非接合
部よりも劣化度の小さい接合部を設けたことを特徴とす
るコネクタにおける電気的接合構造。1. A connector for electrical connection by fitting a connector housing having male terminals and a connector housing having female terminals to each other, wherein at least one of the terminals has at least one terminal. An electrical joint structure in a connector, wherein a joint portion having a degree of deterioration smaller than that of a non-joint portion is provided.
を電気的に接合するコネクタ式酸素センサにおいて、前
記リード端子には非接合部よりも劣化度の小さい接合部
を設けたことを特徴とするコネクタ式酸素センサにおけ
る電気的接合構造。2. A connector-type oxygen sensor for electrically connecting a terminal to a lead terminal provided on a substrate, wherein the lead terminal is provided with a joint portion having a degree of deterioration smaller than that of a non-joint portion. Electrical connection structure of connector type oxygen sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7305977A JPH09145670A (en) | 1995-11-24 | 1995-11-24 | Connector and electrical joint structure in connector type oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7305977A JPH09145670A (en) | 1995-11-24 | 1995-11-24 | Connector and electrical joint structure in connector type oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09145670A true JPH09145670A (en) | 1997-06-06 |
Family
ID=17951585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7305977A Pending JPH09145670A (en) | 1995-11-24 | 1995-11-24 | Connector and electrical joint structure in connector type oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09145670A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005029058A1 (en) * | 2003-09-17 | 2005-03-31 | Ngk Spark Plug Co., Ltd. | Sensor and method of producing the same |
| JP2010164586A (en) * | 2003-09-17 | 2010-07-29 | Ngk Spark Plug Co Ltd | Sensor and sensor producing method |
| JP2014142327A (en) * | 2012-12-25 | 2014-08-07 | Denso Corp | Sensor |
-
1995
- 1995-11-24 JP JP7305977A patent/JPH09145670A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005029058A1 (en) * | 2003-09-17 | 2005-03-31 | Ngk Spark Plug Co., Ltd. | Sensor and method of producing the same |
| JPWO2005029058A1 (en) * | 2003-09-17 | 2006-11-30 | 日本特殊陶業株式会社 | Sensor and sensor manufacturing method |
| US7674143B2 (en) | 2003-09-17 | 2010-03-09 | Ngk Spark Plug Co., Ltd. | Sensor and method of producing sensor |
| JP2010164586A (en) * | 2003-09-17 | 2010-07-29 | Ngk Spark Plug Co Ltd | Sensor and sensor producing method |
| JP2014142327A (en) * | 2012-12-25 | 2014-08-07 | Denso Corp | Sensor |
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