JPS59175166U - Oxygen concentration detector with heater - Google Patents

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本考案の加熱器付酸素濃度検出器の一実施例を
示す断面図であり、第２図は本考案の加熱器付酸素濃度
検出器に用いられる棒状加熱器の　　　　−一具体例を
示す斜視説明図であり、さらに第３図は第２図における
■−■断面を示す断面図である。 そして、第４図は、本考案の加熱器付酸素濃度検出器に
用いる金属製保護カバーの具体例を示す斜視説明図であ
り、第５図は従来の加熱器付酸素濃度検出器と本考案の
加熱器付酸素濃度検出器の排気ガス温度に対する固体電
解質温度の関係を示すグラフである。 １：有底筒状固体電解質、２：ハウジング、３：タルク
、４：ワッシャ、５：リング、６：棒状加熱器、７：保
護カバー、８：セラミックヒータ一本体部、９：リード
端子、１０：リード端子鑞付部、１１：鑞材、１２：被
覆層（メッキ層）、１３ニル−バー、１４：排気ガス導
入口。FIG. 1 is a sectional view showing an embodiment of the oxygen concentration detector with a heater of the present invention, and FIG. 2 is a specific example of a rod-shaped heater used in the oxygen concentration detector with a heater of the present invention. FIG. 3 is a cross-sectional view taken along the line ■--■ in FIG. 2. FIG. FIG. 4 is a perspective view showing a specific example of a metal protective cover used in the oxygen concentration detector with a heater of the present invention, and FIG. 5 shows a conventional oxygen concentration detector with a heater and the present invention. 3 is a graph showing the relationship between the solid electrolyte temperature and the exhaust gas temperature of the heater-equipped oxygen concentration detector of FIG. 1: Bottomed cylindrical solid electrolyte, 2: Housing, 3: Talc, 4: Washer, 5: Ring, 6: Rod-shaped heater, 7: Protective cover, 8: Ceramic heater main body, 9: Lead terminal, 10 : Lead terminal brazing part, 11: Brazing material, 12: Coating layer (plating layer), 13 Nyl bar, 14: Exhaust gas inlet.

Claims (3)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）内外面に多孔質白金電極を有する有底筒状の固体
電解質と、該固体電解質の閉鎖端を排気ガス中に曝す一
方、その筒内を排気ガスより気密に隔離して収納するハ
ウジングと、前記固体電解質の閉鎖端側の外周部を取り
囲み、排気ガスの導入口を有する金属製保護カバーと、
前記固体電解質の筒内に挿入される棒状加熱器とを有す
る加熱器付酸素濃度検出器において、前記棒状加熱器と
して、セラミックに正の抵抗温度係数を有する発熱体を
設けたセラミックヒータ−を用いると共に、該セラミッ
クヒータ一本体部の外表面に前記発熱体と導通ずるリー
ド端子鑞付部を設けて、該リード端子鑞付部に所定のリ
ード端子を銀を包む鑞材により鑞付固定し、さらに該リ
ード端子を固定してなる鑞材の表面に、銀以外の金属よ
りなる被覆層を設けたことを特徴とする加熱器付酸素濃
度検出器。(1) A bottomed cylindrical solid electrolyte with porous platinum electrodes on its inner and outer surfaces, and a housing that exposes the closed end of the solid electrolyte to the exhaust gas, while keeping the inside of the cylinder airtightly isolated from the exhaust gas. and a metal protective cover surrounding the outer periphery of the closed end side of the solid electrolyte and having an exhaust gas inlet;
In the oxygen concentration detector with a heater having a rod-shaped heater inserted into the cylinder of the solid electrolyte, the rod-shaped heater is a ceramic heater in which a heating element having a positive temperature coefficient of resistance is provided in ceramic. At the same time, a lead terminal brazing part is provided on the outer surface of the ceramic heater main body part to be electrically connected to the heating element, and a predetermined lead terminal is brazed and fixed to the lead terminal brazing part with a solder material wrapped in silver, An oxygen concentration detector with a heater, further comprising a coating layer made of a metal other than silver on the surface of the solder material to which the lead terminal is fixed. （２）前記被覆層が、ニッケルメッキ層である実用新案
登録請求の範囲第１項記載の加熱器付酸素濃度検出器。(2) The oxygen concentration detector with a heater according to claim 1, wherein the coating layer is a nickel plating layer. （３）前記セラミックヒータ−の抵抗温度係数が、０．
３％／’　Ｃ以上であることを特徴とする実用新案登録
請求の範囲第１項または第２項記載の加熱器付酸素濃度
検出器。(3) The temperature coefficient of resistance of the ceramic heater is 0.
3%/'C or more, the oxygen concentration detector with a heater according to claim 1 or 2 of the utility model registration claim.