Abstract: A gas sensor (1A) including a sensor element (21) extending in an axial-line O direction; a metal shell (11); a tubular holder (30A) located on a front-end side in a gap between an inner surface of the metal shell and an outer surface of the sensor element; a tubular sleeve (43) located on a rear-end side in the gap; a seal member (41) made from inorganic particles and filling a space between the holder and the sleeve in the gap so as to seal the gap between the metal shell and the sensor element; and a pressing portion (16) compressing the seal member in the axial-line direction, and in which a rearward displacement amount (L) of the sleeve due to expansion of the seal member when the pressing portion is removed is greater than 0 mm.

Abstract: A gas sensor 1 comprising: a sensor element 21; a metallic shell 11; and a single-wall tubular protector 51, wherein the protector has a gas introduction hole 56 and a gas discharge hole 53 disposed on a forward end side in relation to the gas introduction hole; the metallic shell has a fixing portion 13 whose outer surface is fixed to a pipe 100, and a larger-diameter tool engagement portion 14 located on a rear end side of the fixing portion and used to attach the gas sensor; a distance L1 in the axial O direction between the gas introduction hole and the gas discharge hole is greater than a distance L2 in the axial direction between the tool engagement portion and the gas introduction hole; and a forward end 21a of the sensor element is located on the forward end side in relation to the gas introduction hole.

Abstract: A gas sensor (1) including: a sensor element (21) having a detection section (22) through an element introduction hole (25); a metallic shell (11); and a single-wall tubular protector (51) having a gas introduction hole (56) and a gas discharge hole (53); a gap G is present between the gas introduction hole and a forwardly facing surface (12a) of the metallic shell; when the gas introduction hole is viewed toward the rear end side, an area Sh of a portion of the forwardly facing surface seen through the gas introduction hole, is equal to or greater than ½ of an opening area Sg of the gas introduction hole; the element introduction hole is located on the forward end side in relation to a forwardmost end (12f) of the forwardly facing surface; and a distance L1 of the gap G is smaller than a diameter D of the gas introduction hole.

Abstract: A gas sensor (200) including a sensor element (10) having electrode pads (11a-12b); a separator (166); and a plurality of metal terminals (21a, 21b, 22a, 22b) each having a body portion (21a1) and a front end portion (21a2), and being insulated from each other by the separator. The separator has an element storage portion (168) penetrating in the axial-line direction or recessed toward a rear side from a front facing surface of the separator, the element storage portion has a first storage space (168a) at a front side thereof and a second storage space (168b) at a rear side thereof, the second storage space has a rotation restriction wall (168w) configured such that a relative rotation allowable angle 2? between the sensor element and the separator is smaller than in the first storage space, and the rear end side of the sensor element is stored in the second storage space.

Abstract: A gas sensor includes a gas sensor element having a detection portion, a metallic shell holding the gas sensor element, and a tubular body made of metal, which is welded in a state of being externally fitted to a front side or a rear side of the metallic shell. In the present invention, the tubular body is tightly fitted to a tapered portion that is provided at an outer surface of the metallic shell and is radially narrowed toward the tubular body. The tubular body is welded at the tapered portion.

Abstract: A sensor includes a detector element, a connection terminal, and a separator. The contacting portion is in contact with a conductive member so as to overlap the conductive member in a thickness direction, which is a direction of thickness of the detector element between the principal surfaces. The separator includes an element accommodation space that accommodates a portion of an element contact portion and an element back portion, and a partition wall that separates the element accommodation space from a terminal accommodation space that accommodates the contacting portion and a portion of the conductive member and that is adjacent to the element accommodation space in the thickness direction. A frame main body is disposed in an element-side region, which is a region on an element-accommodation-space side in the thickness direction in a region obtained by extending the terminal accommodation space toward the front side in the axial direction.

Abstract: A sensor includes: a detection element; a separator including an insertion portion into which a rear side of the detection element is inserted, and a plurality of terminal housing portions that are disposed surrounding a circumference of the insertion portion around an axial direction, and extend in the axial direction; and a connection terminal that is electrically connected to an electrical connection terminal portion to form a current path. The connection terminal includes a frame body portion and an element contact portion. The sensor further includes a first regulation portion that is located at a position closer to the detection element relative to the frame body portion, in a direction in which a first main surface and a second main surface oppose each other, and regulates the movement of the frame body portion in a direction approaching the detection element.

Abstract: A gas sensor includes a gas sensor element that extends in an axial direction and that includes a detector, which detects a specific gas in a mixed gas; a metal shell that surrounds a periphery of the gas sensor element to hold the gas sensor element; a base that is disposed on a rear side of the metal shell and that covers a rear end portion of the gas sensor element, the base being made of a polymer material; and a metal tube that connects the metal shell and the base to each other and that includes a rear portion and a front portion, the rear portion being integrated with the base, the front portion forming an exposed portion that is exposed from the base. A part of the exposed portion of the tube is connected to the metal shell, and the base is disposed apart from the metal shell.

Abstract: A sensor includes a detector element including a detecting portion and an element back portion on which two or more electrical connection terminal portions are formed; two or more connection terminals which each include an oblong frame main body that extends in an axial direction and an element contact portion that is electrically connected to a corresponding one of the electrical connection terminal portions; a separator that accommodates the connection terminals and the element back portion; and a base that surrounds an outer periphery of the separator. The separator includes a partition wall that is made of a resin material and partitions a plurality of accommodation spaces from each other. The accommodation spaces include an element accommodation space that accommodates portions of the element contact portions and the element back portion, and a plurality of terminal accommodation spaces which each accommodate one of the two or more frame main bodies.

Abstract: A gas sensor includes a protective cover having a resin cylindrical cover portion at a rear end thereof, that can be airtightly attached to an attachment hole, and that can prevent a decrease in quality and a molding defect. A plurality of vertical ribs, which extend substantially parallel to an axis of a cylindrical cover portion, are formed on an outer peripheral surface of the cylindrical cover portion so that protrusions and recesses are provided in a circumferential direction. Due to the presence of the vertical ribs, as compared with an existing cylindrical cover portion that has a smooth outer peripheral surface without the vertical ribs, defects of the outer peripheral surface are not likely to occur in a molding process. Moreover, because slipping is not likely to occur when an operator holds and twists the cylindrical cover portion with his/her fingers, an attachment operation can be smoothly performed.

Abstract: A gas sensor includes: a gas sensor element 10 having a detection portion 11; a metallic shell 50 holding the gas sensor element; and a tubular body 110 made of metal, which is welded in a state of being externally fitted to a front side or a rear side of the metallic shell. The tubular body is tightly fitted to a tapered portion 59t that is provided at an outer surface of the metallic shell and is radially narrowed toward the tubular body. The tubular body is welded at the tapered portion.

Abstract: A gas sensor including: a detection element extending in an axial direction; a tubular metal shell surrounding a periphery of the detection element; and a powder-charged layer disposed between an outer surface of the detection element and an inner surface of the metal shell such that the powder-charged layer is in direct contact with the inner surface of the metal shell. The metal shell has a groove having an opening formed on an outer surface of the metal shell in a circumferential direction thereof, and in the axial direction, one-half or more of the opening is located between a center portion that is a center of the powder-charged layer and a front end, in the axial direction, of the powder-charged layer.

Abstract: A gas sensor includes a gas sensor element that extends in an axial direction and that includes a detector, which detects a specific gas in a mixed gas; a metal shell that surrounds a periphery of the gas sensor element to hold the gas sensor element; a base that is disposed on a rear side of the metal shell and that covers a rear end portion of the gas sensor element, the base being made of a polymer material; and a metal tube that connects the metal shell and the base to each other and that includes a rear portion and a front portion, the rear portion being integrated with the base, the front portion forming an exposed portion that is exposed from the base. A part of the exposed portion of the tube is connected to the metal shell, and the base is disposed apart from the metal shell.

Abstract: A gas sensor includes a protective cover having a resin cylindrical cover portion at a rear end thereof, that can be airtightly attached to an attachment hole, and that can prevent a decrease in quality and a molding defect. A plurality of vertical ribs, which extend substantially parallel to an axis of a cylindrical cover portion, are formed on an outer peripheral surface of the cylindrical cover portion so that protrusions and recesses are provided in a circumferential direction. Due to the presence of the vertical ribs, as compared with an existing cylindrical cover portion that has a smooth outer peripheral surface without the vertical ribs, defects of the outer peripheral surface are not likely to occur in a molding process. Moreover, because slipping is not likely to occur when an operator holds and twists the cylindrical cover portion with his/her fingers, an attachment operation can be smoothly performed.

Abstract: A sensor includes a detector element, a connection terminal, and a separator. The contacting portion is in contact with a conductive member so as to overlap the conductive member in a thickness direction, which is a direction of thickness of the detector element between the principal surfaces. The separator includes an element accommodation space that accommodates a portion of an element contact portion and an element back portion, and a partition wall that separates the element accommodation space from a terminal accommodation space that accommodates the contacting portion and a portion of the conductive member and that is adjacent to the element accommodation space in the thickness direction. A frame main body is disposed in an element-side region, which is a region on an element-accommodation-space side in the thickness direction in a region obtained by extending the terminal accommodation space toward the front side in the axial direction.

Abstract: A sensor includes a detector element including a detecting portion and an element back portion on which two or more electrical connection terminal portions are formed; two or more connection terminals which each include an oblong frame main body that extends in an axial direction and an element contact portion that is electrically connected to a corresponding one of the electrical connection terminal portions; a separator that accommodates the connection terminals and the element back portion; and a base that surrounds an outer periphery of the separator. The separator includes a partition wall that is made of a resin material and partitions a plurality of accommodation spaces from each other. The accommodation spaces include an element accommodation space that accommodates portions of the element contact portions and the element back portion, and a plurality of terminal accommodation spaces which each accommodate one of the two or more frame main bodies.

Abstract: A sensor includes: a detection element; a separator including an insertion portion into which a rear side of the detection element is inserted, and a plurality of terminal housing portions that are disposed surrounding a circumference of the insertion portion around an axial direction, and extend in the axial direction; and a connection terminal that is electrically connected to an electrical connection terminal portion to form a current path. The connection terminal includes a frame body portion and an element contact portion. The sensor further includes a first regulation portion that is located at a position closer to the detection element relative to the frame body portion, in a direction in which a first main surface and a second main surface oppose each other, and regulates the movement of the frame body portion in a direction approaching the detection element.

Abstract: A gas sensor (1) includes at least a sensor element (12) which measures the concentration of a specific gas component, a housing (13) which accommodates the sensor element (12), and a base portion (21) which is attached to the housing and is formed of resin. The base portion includes a first base portion (22) which is a portion of the base portion located on the side toward the housing and which is molded integrally with the housing, and a second base portion (23) which is molded separately from the first base portion, which is a portion of the base portion located opposite the housing, and which has a connector portion (23c) in which a plurality of terminals (26) electrically connected to the sensor element are disposed such that they extend in a direction intersecting the insertion direction of the sensor element.

Abstract: A gas sensor (200) in which individual ones of connection terminals (30) have, at a rear end portion, a first connection portion (31) connected to a corresponding connector terminal (60). Individual ones of the connector terminals have, at an end portion on a side toward separator (40), a second connection portion (61) connected to the first connection portion. One of the first and second connection portions assumes the form of an insertion piece (61g), and the other assumes the form of a female portion (31g) into which the insertion piece is inserted. At least one of the insertion piece and the female portion has an elastic portion (31a). The insertion piece is fitted into the female portion, and the elastic portion thereby elastically bends, whereby the first and second connection portions are elastically connected.

Abstract: A thin plate member which has a groove portion recessed toward the inside in a radial direction with a gap interposed between the thin plate member and the outer surface of a site on the front end side of a main body section. At least one end of the thin plate member is joined to the outer surface of the main body section and is provided radially outside the site on the front end side of the main body section. A seal member is disposed in the groove portion and has elasticity due to resin. Since the gap functions as a heat-insulating layer and is interposed between the seal member and the main body section, heat conduction from the main body section, that is, heat conduction through a first pathway is reduced, and thus deterioration of the seal member due to heat is suppressed.