| 摘要 |
A gas sensor comprising: the gas sensor element defined; the cylindrical metal shell defined herein; and the protector defined herein, wherein the protector defined herein has a double structure including the cylindrical inner cover portion and the outer cover portion both defined herein, and a leading end portion positioned on a leading end side of the support face of the metal shell, the outer cylindrical portion and the inner cylindrical portion are arranged to construct an inner gas introducing passage for guiding the object gas introduced from the outer gas introducing apertures, between the outer cylindrical portion and the inner cylindrical portion, across a trailing end of the inner cylindrical portion closer to a leading end side, as viewed in an axial direction, than an inner circumferential side end edge of a joining face joining an inner circumference and an outer circumference of a leading end portion of said metal shell, into a clearance between the inner cover portion and the leading end portion of the gas sensor element.
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