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JPH09325128A - Oxygen sensor - Google Patents

Oxygen sensor

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Publication number
JPH09325128A
JPH09325128A JP16671696A JP16671696A JPH09325128A JP H09325128 A JPH09325128 A JP H09325128A JP 16671696 A JP16671696 A JP 16671696A JP 16671696 A JP16671696 A JP 16671696A JP H09325128 A JPH09325128 A JP H09325128A
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JP
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Prior art keywords
heater
part
terminal
oxygen
metal
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Pending
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JP16671696A
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Japanese (ja)
Inventor
Keizo Furusaki
Tatsuya Okumura
Shoichi Otsuki
Yasuhiro Yamada
圭三 古崎
正一 大月
達也 奥村
康弘 山田
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Ngk Spark Plug Co Ltd
日本特殊陶業株式会社
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Abstract

PROBLEM TO BE SOLVED: To improve the assembling performance at the time of insertion of a heater into an oxygen detecting element by making the oxygen sensor with the heater absorb misalignment between an output lead-out terminal gripping the heater and the heater. SOLUTION: The metal terminal 5 is equipped with a heater grip part 5a (1st metal cylinder part) which grips the heater 2 axially at one place, an internal electrode connection part 5b (2nd metal cylinder part) which comes into contact with the inside electrode layer of the oxygen sensor element 1, and a flexible neck part 5c which connects them. The heater 2 is supported by the heater grip part 5a of the terminal 5 at one point and the heater 2 becomes easier to tilt to the terminal 5 because of the flexibility of the neck part 5c, so that the misalignment between the terminal 5 and heater 2 can easily be absorbed when the heater is inserted into the oxygen detecting element 1.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】この発明は、例えば自動車の排ガス中の酸素濃度を検出するための酸素センサに関し、特に軸状のヒータが組み込まれる酸素センサにおけるそのヒータの支持構造に関する。 TECHNICAL FIELD The present invention is, for example, relates to an oxygen sensor for detecting oxygen concentration in the exhaust gas of an automobile, regarding the support structure of the heater in particular oxygen sensor shaft-like heater is incorporated.

【0002】 [0002]

【従来の技術】近年、例えば自動車等の排ガス浄化の要求が高まり、始動時やアイドル時など、排ガス温度が低い場合でも排ガス中の酸素濃度を良好に検出することができるように、ヒータ付き酸素センサが開発されている。 Recently, for example, requests for exhaust gas purification is enhanced, such as an automobile, such as during start-up and idle, as the oxygen concentration in the exhaust gas even if the exhaust gas temperature is low can be satisfactorily detected, oxygen Heater sensors have been developed. 例えば、実開昭60−82264や、特開平6−2 For example, Japanese Utility Model 60-82264 or JP-A-6-2
42064等の公報に開示されているものはその一例である。 Those disclosed in JP-like 42,064 is an example. 一般的には、酸素濃度を検出する酸素検知素子を一端が閉塞された筒状(コップ状)に成形し、この内部に軸状のヒーターを挿入する。 In general, molded to the oxygen concentration detection for oxygen end the sensing element is closed the tubular (like a cup), to insert a shaft-like heater internal. また、酸素検知素子内面の内部電極層からの出力を取り出すために、出力取出し用端子が設けられ、この端子が軸状のヒータを把持するホルダの役割を兼ね、そのヒータは酸素検知素子の内壁との間に適当な間隙を保って配置される。 Further, in order to take out the output from the internal electrode layer of the oxygen sensing element inner surface, the output extraction terminal is provided, serves the role of the holder this pin to grip the shaft-like heater, the inner wall of the heater oxygen sensing element They are arranged while maintaining a suitable gap between the. つまり、酸素濃度を検出する酸素検知素子はジルコニア等のセラミックから形成されるのに対し、ヒータは電気絶縁性を確保するため通常はアルミナ等で構成する。 In other words, the oxygen sensing element for detecting the oxygen concentration while being formed from a ceramic such as zirconia, a heater is usually used to ensure the electrical insulation composed of alumina or the like. このような酸素検知素子とヒータを完全に結合させると、熱膨張率の違いによって破壊するおそれがあるので、ヒータと酸素検知素子の内壁との間には所定の間隙が必要となる。 If such is the oxygen completely couple the sensing element and the heater, there is a risk of destroying the difference in thermal expansion coefficients, a predetermined clearance is required between the inner wall of the heater and the oxygen sensing element.

【0003】 [0003]

【発明が解決しようとする課題】ところで、近年の環境保全の要求の高まりとともに、酸素センサに求められる特性として、始動時の活性化時間を短くしたいという要求が大きくなり、そのためにはヒータと検知素子との隙間をできるだけ小さくする設計が有効になる。 [0007] Meanwhile, with increasing recent environmental conservation demand, as properties required for the oxygen sensor, activation time a request is increased desire to shorten the time of starting, and the heater in order that the detection designed to minimize the clearance between the elements is enabled. ここで、 here,
ヒータを支持する役割を兼ねる上述の出力取出し用端子は、通常、ヒータを把持するための第1の金属筒状部と、その第1の金属筒状部と同心的にかつそれより大きな径で形成されて上記酸素検知素子の内部電極層に接触する第2の金属筒状部とが、連結部を介して一体化されたものである。 Output extraction terminals of the above which also serves as a role of supporting the heater is usually in the first metal tubular portion, a first concentrically and larger diameter than the metal cylinder portion thereof for gripping the heater it is formed and the second metal cylinder portion in contact with the inner electrode layer of the oxygen sensing element, in which are integrated through a connecting portion. このような金属端子の加工精度はそれほど高くないので、ヒータを把持する第1の金属筒状部と酸素検知素子内面に接触する第2の金属筒状部の中心が必ずしも正確に同心とならず、ある程度はずれることを避け得ない。 Since the machining accuracy of such metal terminals are not so high, not the first center necessarily accurately concentric metal cylinder portion and the second metal cylinder portion in contact with the oxygen sensing element inner surface for gripping the heater , unavoidable that to some extent deviate.

【0004】そして図6に示すように、従来の端子10 [0006] As shown in FIG. 6, the conventional terminal 10
0は、中間部に前述の酸素検知素子内面に接触する1又は複数の内部電極接続部101(第2の金属筒状部) 0, 1 or more internal electrode connecting portion 101 contacts the intermediate portion to the oxygen sensing element inner surface of the aforementioned (second metal cylinder portion)
と、この両側に位置して棒状のヒータ102をその軸方向の2箇所で強固にクランプするヒータ把持部(第1の金属筒状部)103a,103bを含む。 When, including heater supporting portion (first metal cylinder portion) 103a, 103b to firmly clamp the rod-shaped heater 102 located on the opposite sides in two places in the axial direction. それらヒータ把持部103a,103bと内部電極接続部102との芯ずれにより、図7のように端子100に対しヒータ1 They heater supporting portion 103a, the misalignment between 103b and the internal electrode connection part 102, the heater 1 to the terminal 100 as shown in FIG. 7
02が傾いた状態で、そのヒータ102を酸素検知素子104内に無理に押し込むと、主に一方のヒータ把持部103aの所でヒータ102に曲げ応力が生じ、それが強度限界を超えるとヒータ102が欠損する原因となりやすい。 In a state where 02 is inclined, when the heater 102 of the oxygen sensing element forcibly pushed into the 104, mostly bending stress is generated in the heater 102 at the one heater supporting portion 103a, the heater 102 when it exceeds the strength limit There tends to be a cause of loss. また、ヒータ挿入時には、ヒータと素子の内側電極とが擦れ合うことになるが、それによって素子の内側電極が傷付き、出力特性が劣化するという不具合もあった。 Further, when the heater insert, but would rub against the inner electrodes of the heater and elements, whereby the inner electrode is scratched elements, output characteristics were also disadvantageously deteriorates. そのため従来では、酸素検知素子104とヒータ102との隙間を極端に小さくはできず、このことが酸素センサに求められる始動時の活性化時間を短縮することの制約となる。 Therefore, in the conventional, can not extremely small gap between the oxygen sensing element 104 and the heater 102, which is the limitation of reducing the activation time at the start required for the oxygen sensor.

【0005】この発明は、酸素検知素子とヒータとの隙間を小さくでき、かつそのヒータの酸素検知素子内への挿入の際にもヒータの欠損や内側電極の損傷等を生じない技術を提供することにある。 [0005] This invention can reduce the gap between the oxygen sensing element and the heater, and to provide a technique that does not cause damage to the heater of the defect and the inner electrode during their insertion into the oxygen sensing element of the heater It lies in the fact.

【0006】 [0006]

【課題を解決するための手段及び効果】請求項1は、内外面に電極層を有する一端が閉塞された筒状の酸素検知素子と、該酸素検知素子を所定温度に保つための軸状のヒータと、該酸素検知素子内面の内部電極層と電気的に接続される出力取出し用端子とを含む酸素センサにおいて、出力取出し用端子を、ヒータを把持する1箇所のヒータ把持部と、酸素検知素子の内部電極層と接触する少なくとも1箇所の内部電極接続部と、それらヒータ把持部と内部電極接続部をつなぐ連結部とを備えるものとする酸素センサである。 Means for Solving the Problems and Advantages] claim 1, shaped tube having one end with an electrode layer on the inner and outer surface is closed and the oxygen sensing element, the shaft-shaped to maintain the oxygen sensing element to a predetermined temperature a heater, in the oxygen sensor and an output extraction terminal is internal electrode layer electrically connected to said oxygen sensing element inner surface, an output extraction terminal, the heater supporting portion of one position for gripping the heater, the oxygen sensing at least one location inside the electrode connection portion in contact with the inner electrode layer of the device, an oxygen sensor which is assumed and a connecting portion connecting them heater supporting portion and the internal electrode connection part. この発明では、出力取出し用端子のヒータ把持部を1箇所のみとしたことにより、従来の2点支持に比べて、ヒータがその出力取出し用端子に対し傾くことが容易となる。 In the present invention, by a heater supporting portion of the output extraction terminal was only one place, as compared with the conventional two-point support, the heater is easy to tilt with respect to the output extraction terminals. それによってヒータ及びこれを把持した上記端子を酸素検知素子内に挿入する際に、 Whereby when inserting the terminal gripping heater and which in the oxygen sensing element,
仮にヒータと端子との間に軸ぶれ(芯ずれ)が生じていても、ヒータの上記1点支持構造によりその軸ぶれを吸収しやすくなる。 Even if not shaft wobble (misalignment) is generated between the heater and the terminal, it is easy to absorb the axial shake by the one-point support structure of the heater. 請求項2は、連結部を1箇所のヒータ把持部と内部電極接続部とをくびれた形態でつなぐ首部とすることで一層ヒータが傾き易く、そのヒータに過度の曲げ応力が生じにくい構成である。 Claim 2, the connecting portion apt slope more heaters by a neck portion connecting with constricted form a heater supporting portion and the internal electrode connecting portion at one point, in the configuration of hardly occurs excessive bending stress on the heater .

【0007】請求項3は、上述のような酸素センサの出力取出し用端子を、ヒータを把持するための第1の金属筒状部と、該第1の金属筒状部と同心的にかつそれより大きな径で形成されて酸素検知素子の内面部電極層に接触する第2の金属筒状部と、それら第1及び第2の金属筒状部を連結する可撓性を有する首部とを含むものとした酸素センサである。 [0007] Claim 3 is the output extraction terminals of the oxygen sensor as described above, a first metal tubular portion for gripping the heater, the metal cylinder portion of the first and concentrically and it and a neck portion having a second metal tubular portion which contacts the more is formed with a large diameter inner surface electrode layer of the oxygen sensing element, their flexibility for connecting the first and second metal tubular portion an oxygen sensor and things. この発明では、酸素ヒータと出力取出し用端子との組付け上のばらつき等に伴う芯ずれを吸収するという課題においては請求項1と同様であるが、その解決手段としては、ヒータ把持部に相当する第1の金属筒状部と、内部電極接続部に対応する第2の金属筒状部とを、可撓性を有する首部で連結したものである。 In the present invention, but in the problem of absorbing the misalignment due to variations in the assembling of the oxygen heater and the output extraction terminal is the same as defined in Claim 1, As the solution, corresponding to heater supporting portion a first metal cylinder unit which, a second metal cylinder portion corresponding to the internal electrode connection part is obtained by connecting with a neck portion having flexibility. ここでは、ヒータを把持する第1の金属筒状部は2 Here, the first metal cylinder portion that grips the heater 2
点支持であっても、首部が可撓性を有しているため、上記端子に対するヒータの傾きがある程度許容され、酸素検知素子内への挿入の際に、前述の芯ずれを吸収する効果がある。 Even point support, since the neck portion is flexible, is allowed inclination of the heater with respect to the terminal to some extent, upon insertion into the oxygen sensing element, the effect of absorbing the misalignment of the foregoing is there. 請求項4のように、この首部を1箇所とすれば、ヒータが1点支持となり、芯ずれ吸収等の効果は一層顕著なものとなる。 As in claim 4, if the neck one place and, the heater is one point support, the effect of such misalignment absorption becomes more remarkable.

【0008】また、その首部を第1の金属筒状部の円周の1/3以下である幅部分を有するものとすれば、充分な可撓性(これは弾性変形性をも含む趣旨である)が確保しやすくなる。 Further, if the neck portion and having a third width portion is less than the circumference of the first metal tubular portion, with sufficient flexibility (meaning which also includes a resilient deformability a) it is likely to be secured. 1/6以下であれば更に望ましい。 Further desirable if the 1/6 or less. なお首部に可撓性を付与する上では、その幅を狭くすることの他に、厚みを減ずること、あるいは周方向に沿って溝等の凹凸をつけたりスリット等を入れることも有効である。 Note that, in order to impart flexibility to the neck, in addition to narrowing the width, that reduce the thickness, or along the circumferential direction that a slit or the like or attached irregularities such as grooves also effective.

【0009】 [0009]

【発明の実施の形態】以下、図面に示す実施例を参照しつつ、本発明の実施の形態を説明する。 BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, with reference to embodiments shown in the drawings, an embodiment of the present invention.

【0010】図1においてジルコニア等のセラミックからなる酸素検知素子1は、コップ状に成形され、その内側と外側に図示しない白金などの触媒性の金属からなる電極を形成したものである。 [0010] the oxygen sensing element 1 made of a ceramic such as zirconia in Figure 1, is formed into a cup shape is obtained by forming an electrode made of catalytic metals such as platinum, not shown on the inside and outside. その外側電極に排ガスを接触させ、内側電極に大気などの基準ガスを接触させることで、それぞれのガスの酸素分圧差によって検知素子1 As the outer electrode contacting the exhaust gas, by contacting the reference gas such as atmospheric to the inner electrode, the sensing element 1 by the oxygen partial pressure difference of the respective gas
の内外両面に生ずる電圧を検出して酸素濃度を測定する。 Detecting a voltage generated in the inner and outer surfaces to measure the oxygen concentration. この検知素子1は、例えば300℃以上の温度でないと電圧が出力されないため、通常は検知素子1の内部電極に近接してセラミックヒータ2(以下単にヒータという)を設け、強制的に検知素子1を活性化する。 The sensing device 1, for example 300 ° C. or more non-temperature when because no voltage is output, normally provided a ceramic heater 2 close to the internal electrodes of the sensing element 1 (hereinafter simply referred to heater), forcibly sensing element 1 the activated. ヒータ2は、例えばアルミナ等のセラミックからなる軸状のもので、電極端子3等を介して通電される。 The heater 2, for example, those of the shaft-like made of a ceramic such as alumina, is energized through the electrode terminals 3 and the like. 酸素検知素子1の外部電極の出力は出力取出し用端子の外部電極接続部4b及び引出し線4で、また内部電極の出力は出力取出し用端子(以下、金属端子若しくは単に端子という)5の内部電極接続部5b及び引出し線6を介して取り出される。 The output of the external electrode of the oxygen sensing element 1 in the external electrode connecting portion 4b and the lead wire 4 of the output extraction terminals, and the output of the internal electrodes is output extraction terminal (hereinafter, referred to as metal terminals or simply pin) 5 internal electrodes It is taken out through the connection portion 5b and the lead line 6. 引き出し線4と検知素子1との電気的な接触には、検知素子1の開口側の外周まわりに連結される帯状の外部電極接続部4bが介在している。 The electrical contact of the lead lines 4 and the sensing element 1, a strip-shaped external electrode connecting portion 4b which is connected to the outer periphery around the opening side of the sensing element 1 is interposed.

【0011】端子5はヒータ2のホルダを兼ねるもので、そのヒータ2を周方向にクランプする第1の金属筒状部としてのヒータ把持部5aと、これより大きい径で形成されて、酸素検知素子1の内面の内部電極層に接触する第2の金属筒状部としての前記内部電極接続部5b [0011] terminal 5 is intended to serve as the holder of the heater 2, and the heater supporting portion 5a of the first metal tubular portion for clamping the heater 2 in the circumferential direction, it is formed with larger diameter than this, the oxygen sensing the internal electrode connection part 5b of the second metal cylinder portion in contact with the inner electrode layer of the inner surface of the element 1
と、これらをつなぐ可撓性を有する首部5cとを備えている。 When, and a neck portion 5c having a flexible connecting them.

【0012】図2は、この端子5及びヒータ2を取り出して示すもので、ヒータ把持部5aは、ヒータ2の軸方向で1箇所にのみ形成され、かつ首部5cがくびれた形態となっている。 [0012] Figure 2 shows retrieve this terminal 5 and the heater 2, the heater gripping portion 5a has a form that is formed only in one place in the axial direction of the heater 2, and a constricted neck portion 5c . そのため、首部5cの可撓性、つまりその弾性変形又は塑性変形に基づき、ヒータ2が端子5 Therefore, flexibility of the neck 5c, i.e. on the basis of its elastic deformation or plastic deformation, the heater 2 is terminal 5
に対して傾き易くなっている。 It has become easier to tilt against. また、ヒータ2がヒータ把持部5aの1点支持で把持されていることも傾き易くする原因となる。 Moreover, the heater 2 is gripped at one point support heater supporting portion 5a also causes the sake slope. そして、このヒータ2と端子5を組み付けたアッセンブリを酸素検知素子1内に挿入する際に、端子5とヒータ2に芯ずれがあっても、それを吸収しやすい。 Then, when inserting the assembly assembled with the heater 2 and the terminal 5 to the oxygen sensing element 1, even if there is misalignment in the terminal 5 and the heater 2, easily absorb it. 言い換えると、その挿入時にヒータ2に過大な曲げ応力が生じないことで、ヒータ2の欠損等が防止される。 In other words, by excessive bending stress in the heater 2 at the time of insertion does not occur, defects or the like of the heater 2 can be prevented.

【0013】図3は、このような端子5を模式的に示すもので、複数の内部電極接続部5bはその合わせ目で滑らかな凹凸の山と谷が対応して近接し、それらの合わせ目に凹凸状のスリット5dが現れる。 [0013] Figure 3, such a terminal 5 shows schematically, a plurality of inner electrode connecting portions 5b are closely correspond the peaks and valleys of the smooth irregularities in the seam, seams thereof uneven slit 5d appears in. 一方、ヒータ把持部5aでは軸方向と平行な直線的なスリット5eが現れる。 On the other hand, the direction parallel to the axial linear slits 5e in the heater supporting portion 5a appears. また、首部5cは円弧状の断面を有する。 Also, neck 5c has an arcuate cross-section. このような端子5は、平面的に打ち抜かれた板素材を丸めるように湾曲成形したものである。 Such terminal 5 is a curved shaped to round the plate material punched in a plane. そして図4に示すように、 Then, as shown in FIG. 4,
首部5cは、ヒータ把持部5aの1円周のうちの60° Neck 5c is, 60 ° of the one circumference of the heater supporting portion 5a
以下の幅に設定することが望ましい。 It is desirable to set the width of less than. これは、1円周長に対して1/6以下ということである。 This is that 1/6 or less relative to 1 circumference. このように首部5cの幅を設定することで、その首部5cが良好な可撓性を有し、しかも十分な強度を有するものにすることができる。 By thus setting the width of the neck portion 5c, it is possible that the neck portion 5c has a good flexibility, yet to have sufficient strength.

【0014】図5は、端子5の形態を複数種類示すもので、(a)は既に説明したタイプで、引出し線6とは反対側に1箇所の把持部5a及び首部5cを有するものであり、(b)は引出し線6と同じ側にヒータ把持部5a [0014] Figure 5 shows a plurality of types in the form of terminal 5, which has (a) shows already the type described, the grip portion 5a and neck portion 5c of the one place on the side opposite to the lead wire 6 , (b) the heater supporting portion 5a on the same side as the lead wire 6
を有し、またそれに隣接して首部5cを有する。 Has also has a neck portion 5c adjacent thereto. さらに(c)は、端子中央にヒータ把持部5aを有するもので、内部電極接続部(第2の金属筒状部)5bは両側に分断された形態となり、首部5cもヒータ把持部5aの両側の2箇所に存在することとなる。 Further (c) is one having the heater supporting portion 5a to the terminal center, the internal electrode connection part (second metal cylinder portion) 5b becomes divided form on both sides, both sides of the neck 5c also heater supporting portion 5a It will be present in two places.

【0015】なお、例えばその(c)に示すように、首部5cが2又はこれ以上ある場合は、それぞれの首部の幅の合計が、最大でその円周に対し1/3、更に望ましくは1/6以下とすることが、前述の良好な可撓性を確保する上で有効である。 [0015] Incidentally, for example, as shown in Part (c), if the neck 5c is 2 or more, the sum of the widths of the neck portion is 1/3 to its circumference at maximum, more preferably 1 / 6 be less, it is effective in ensuring good flexibility discussed above.

【0016】以上はヒータ把持部5aが軸方向の1箇所にある例であったが、これが例えば2箇所ある場合でも首部5cの可撓性により、ヒータ2が端子5に対しある程度の傾きが許容され、端子5とヒータ2との芯ずれの解消には有効である。 The above is heater supporting portion 5a were examples in one location in the axial direction, the flexibility of the neck portion 5c even if it is for example two positions, the heater 2 is to some extent tilt with respect to the terminal 5 acceptable it is, is effective for eliminating the misalignment between the terminal 5 and the heater 2. また、端子5の加工精度としても、従来より低い加工精度で済むという効果を有する。 Further, even if the processing accuracy of the terminal 5 has the effect of requiring lower than conventional processing accuracy.
また、ヒータ挿入時に内側電極が傷つくことも首部の可撓性により容易に回避される。 It is also easily avoided by flexible neck inner electrode damaged when the heater insert. 結果として、ヒータ外径と素子内径の寸法を従来より近づけることができ、センサの暖気特性を向上させることができる。 As a result, the size of the heater OD and the element inner diameter can be made closer than conventional, it is possible to improve the warm-up characteristics of the sensor.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の一実施例である酸素センサの断面図。 Figure 1 is a cross-sectional view of an oxygen sensor which is an embodiment of the present invention.

【図2】ヒータ及び出力取出し用端子と酸素検知素子の分解図。 Figure 2 is an exploded view of the heater and the output extraction terminals and the oxygen sensing element.

【図3】その端子の模式図。 FIG. 3 is a schematic view of the terminal.

【図4】図3の首部のA−A断面図。 [4] A-A cross-sectional view of the neck portion of FIG.

【図5】その端子の形態の幾つかの種類を示す図。 5 is a diagram showing the several types of forms of its terminals.

【図6】従来の一例を示す図。 6 shows a conventional example.

【図7】その従来例の作用説明図。 [7] explanatory diagram of the operation of the conventional example.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 酸素検知素子 2 ヒータ 5 出力取出し用端子 5a ヒータ把持部(第1の金属筒状部) 5b 内部電極接続部(第2の金属筒状部) 5c 首部 1 oxygen sensing element 2 heater 5 output extraction terminals 5a heater supporting portion (first metal cylinder portion) 5b internal electrode connecting portion (second metal cylinder portion) 5c neck

───────────────────────────────────────────────────── フロントページの続き (72)発明者 古崎 圭三 愛知県名古屋市瑞穂区高辻町14番18号 日 本特殊陶業株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor old Saki Keizo Nagoya, Aichi Prefecture Mizuho-ku, Takatsuji-cho, No. 14 No. 18 Date this special Suegyo within Co., Ltd.

Claims (4)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 内外面に電極層を有する一端が閉塞された筒状の酸素検知素子と、該酸素検知素子を所定温度に保つための軸状のヒータと、該酸素検知素子内面の内部電極層と電気的に接続される出力取出し用端子とを含む酸素センサにおいて、 前記出力取出し用端子は、前記ヒータを把持する1箇所のヒータ把持部と、前記酸素検知素子の内部電極層と接触する少なくとも1箇所の内部電極接続部と、それらヒータ把持部と内部電極接続部をつなぐ連結部とを備えることを特徴とする酸素センサ。 1. A a cylindrical oxygen sensing element having one end closed with an electrode layer on the inner and outer surfaces, a shaft-like heater to keep the oxygen sensing element to a predetermined temperature, the internal electrodes of the oxygen sensing element inner surface in the oxygen sensor and an output extraction terminal connected to the layer and electrically, and the output extraction terminals, a heater supporting portion of one position for gripping said heater in contact with the inner electrode layer of the oxygen sensing element oxygen sensor comprising: the internal electrode connection part of at least one place, and a connecting portion connecting them heater supporting portion and the internal electrode connection part.
  2. 【請求項2】 前記連結部は、前記1箇所のヒータ把持部と前記内部電極接続部とをくびれた形態でつなぐ首部である請求項1に記載の酸素センサ。 Wherein said connecting portion, the oxygen sensor according to claim 1, wherein the neck portion connecting a form constricted and said heater gripping portion of the one position the internal electrode connection part.
  3. 【請求項3】 内外面に電極層を有する一端が閉塞された筒状の酸素検知素子と、該酸素検知素子を所定温度に保つための軸状のヒータと、該酸素検知素子内面の内部電極層と電気的に接続される出力取出し用端子とを含む酸素センサにおいて、 前記出力取出し用端子は、前記ヒータを把持するための第1の金属筒状部と、該第1の金属筒状部と同心的にかつそれより大きな径で形成されて前記酸素検知素子の内面部電極層に接触する第2の金属筒状部と、それら第1 3. A cylindrical oxygen sensing element having one end closed with an electrode layer on the inner and outer surfaces, a shaft-like heater to keep the oxygen sensing element to a predetermined temperature, the internal electrodes of the oxygen sensing element inner surface in the oxygen sensor and an output extraction terminal connected to the layer and electrically, and the output extraction terminals, a first metal tubular portion for gripping the heater, the first metal cylinder portion a second metal cylinder portion concentrically and is formed than in the larger diameter contacts the inner surface electrode layer of the oxygen sensing element and, they first
    及び第2の金属筒状部を連結する可撓性を有する首部とを含むことを特徴とする酸素センサ。 And the oxygen sensor which comprises a neck portion having flexibility for connecting the second metal cylinder portion.
  4. 【請求項4】 前記首部が前記出力取出し用端子の軸方向の1箇所に形成されている請求項3に記載の酸素センサ。 Wherein the oxygen sensor according to claim 3, wherein the neck portion is formed in one place in the axial direction of the output extraction terminal.
JP16671696A 1996-06-05 1996-06-05 Oxygen sensor Pending JPH09325128A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16671696A JPH09325128A (en) 1996-06-05 1996-06-05 Oxygen sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16671696A JPH09325128A (en) 1996-06-05 1996-06-05 Oxygen sensor

Publications (1)

Publication Number Publication Date
JPH09325128A true true JPH09325128A (en) 1997-12-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6267857B1 (en) 1998-06-01 2001-07-31 Ngk Spark Plug Co., Ltd. Oxygen sensor with a heater
JP2002296218A (en) * 2001-03-29 2002-10-09 Denso Corp Method of manufacturing gas sensor
US6660143B1 (en) 1999-06-11 2003-12-09 Ngk Spark Plug Co., Ltd. Oxygen sensor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6267857B1 (en) 1998-06-01 2001-07-31 Ngk Spark Plug Co., Ltd. Oxygen sensor with a heater
US6660143B1 (en) 1999-06-11 2003-12-09 Ngk Spark Plug Co., Ltd. Oxygen sensor
JP2002296218A (en) * 2001-03-29 2002-10-09 Denso Corp Method of manufacturing gas sensor
JP4560977B2 (en) * 2001-03-29 2010-10-13 株式会社デンソー Method of manufacturing a gas sensor

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