公开(公告)号：US10908116B2

公开(公告)日：2021-02-02

申请号：US16165295

申请日：2018-10-19

Applicant: NGK Spark Plug Co., LTD.

Inventor： Tomoki Fujii ,  Takehiro Oba

IPC: G01N27/407

Abstract: In a circular cross section obtained by cutting a protector along a plane which is orthogonal to an axial direction and passes through gas introduction holes, the gas introduction holes are arranged asymmetrically in the circumferential direction of a circumferential wall of the protector. When the circular cross section is bisected into first and second divisional regions by a straight line which passes through the center of the circular cross section and does not pass through any gas introduction holes, the total opening area of gas introduction holes located in the first divisional region is smaller than the total opening area of gas introduction holes located in the second divisional region.

公开(公告)号：US10393715B2

公开(公告)日：2019-08-27

申请号：US15481197

申请日：2017-04-06

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kunihiko Yonezu ,  Takehiro Oba

IPC: G01N33/00

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.

公开(公告)号：US10203301B2

公开(公告)日：2019-02-12

申请号：US15618340

申请日：2017-06-09

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Shunya Mihara ,  Takehiro Oba ,  Shogo Nagata

IPC: G01N27/40 ,  G01N27/416 ,  G01N33/00 ,  G01N27/407

Abstract: A gas sensor includes a sensor element having an electrode pad and a metal terminal member including a forward metal terminal member connected to the electrode pad, and a rear metal terminal member connected to the forward metal terminal member and a lead wire. The rear metal terminal member includes a forward end portion, a central portion, and a lead-wire connection portion. The forward end portion and the central portion are integrally connected through a first neck portion smaller in sectional area than the forward end portion and the central portion. The central portion and the lead-wire connection portion are integrally connected through a second neck portion smaller in sectional area than the central portion and the lead-wire connection portion. The first neck portion is greater in moment of inertia of area than the second neck portion.

公开(公告)号：US09857343B2

公开(公告)日：2018-01-02

申请号：US14990605

申请日：2016-01-07

Applicant: NGK Spark Plug Co., LTD.

Inventor： Kunihiko Yonezu ,  Takehiro Oba

IPC: G01N33/00 ,  G01N27/406 ,  G01N27/407 ,  G01M15/10

CPC classification number: G01N33/0009 ,  G01M15/102 ,  G01N27/4062 ,  G01N27/4077 ,  G01N27/4078

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.

公开(公告)号：US09541533B2

公开(公告)日：2017-01-10

申请号：US14168630

申请日：2014-01-30

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Takehiro Oba ,  Shingo Ito ,  Makoto Kume ,  Daisuke Tahira

IPC: G01N27/407 ,  G01N33/00

CPC classification number: G01N33/0009 ,  G01N27/407

Abstract: A gas sensor (1) has a platelike detection element (5) extending in an axial direction and a ceramic member (67) having an element insertion hole (81) into which the detection element (5) is inserted. When the ceramic member (67) is viewed from the axial direction, the element insertion hole (81) has a main insertion hole (83) having a substantially quadrate shape surrounded by four sides, and relief holes (85), (86), (87) and (88), each of which is surrounded by an outline connecting ends of two adjacent sides of the four sides of the main insertion hole (83) and located radially outward of the main insertion hole (83) so as to communicate with the main insertion hole 83.

Abstract translation: 气体传感器（1）具有沿轴向延伸的板状检测元件（5）和具有插入检测元件（5）的元件插入孔（81）的陶瓷部件（67）。 当从轴向观察陶瓷构件67时，元件插入孔81具有由四边包围的大致四边形形状的主插入孔83，并且具有排出孔85，（86） （87）和（88），其中每个由主插入孔（83）的四个侧面的两个相邻端的端部围绕，并且位于主插入孔（83）的径向外侧，以便连通 与主插入孔83。

公开(公告)号：US11821865B2

公开(公告)日：2023-11-21

申请号：US17046224

申请日：2019-02-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Masana Okai ,  Takehiro Oba ,  Daisuke Tahira ,  Masashi Nomura

IPC: G01N27/28 ,  G01N27/407 ,  G01N33/00

CPC classification number: G01N27/283 ,  G01N27/407 ,  G01N33/0036

Abstract: A gas sensor including: a sensor element extending in an axial direction; a metal shell surrounding and supporting the sensor element; an exterior tube that is tubular and is mounted to a rear end of the metal shell; a metal terminal including a first end connected to a lead wire and a second end electrically connected to the sensor element; a separator that is tubular and is disposed in the exterior tube and contains the metal terminal and the sensor element; and a holder being in contact with the separator in the axial direction. The holder includes ribs formed in a frontward face or a rearward face of the holder and arranged at predetermined intervals in a circumferential direction. Each of the ribs occupies a region having a length equal to or greater than a thickness of the holder, as viewed in the axial direction.

公开(公告)号：US20210018461A1

公开(公告)日：2021-01-21

申请号：US16912233

申请日：2020-06-25

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Sunchao LIU ,  Takehiro Oba

IPC: G01N27/407 ,  G01N27/409 ,  G01N27/406 ,  C04B35/00

Abstract: A gas sensor (1) including a sensor element (10) and a separator (90) having an element hole (90h), as viewed from a particular side which is a forward-end side or a rear-end side. The separator has end surfaces (90e) located farthest in an axial direction toward the particular side, recess regions (90h), (90r1) and (90r2) recessed from the end surfaces, and first regions R1 and second regions R2. First regions R1 are determined by eliminating a region SB occupied by the sensor element from a region SA defined by imaginary short-side lines and the outer edge of the separator. Second regions R2 are determined by eliminating the region SB from a region SC defined by imaginary long-side lines and the outer edge of the separator. A relation of S2/S1≥0.5 is satisfied, where S1 is the total area of R1 and R2, and S2 is the total area of the recess regions.

公开(公告)号：US10520463B2

公开(公告)日：2019-12-31

申请号：US15481986

申请日：2017-04-07

Applicant: NGK Spark Plug Co., LTD.

Inventor： Takehiro Oba ,  Shogo Nagata ,  Shunya Mihara

IPC: G01N27/407 ,  G01N27/30 ,  G01N27/409 ,  G01N27/406

Abstract: An insulating separator of a gas sensor is formed to be dividable into a forward separator having a terminal disposition hole, and a rear separator having four terminal disposition holes. The insulating separator has a ventilation path formed between the forward separator and the rear separator. As a result, moisture and the like which enter the insulating separator from a forward side of the forward separator through the terminal disposition hole can be discharged outward of the insulating separator through the ventilation path. As a result, corrosion of metal terminals caused by entry of moisture can be reduced, whereby transmission of a sensor signal and application of current or voltage through the metal terminals can be appropriately implemented.

公开(公告)号：US10067106B2

公开(公告)日：2018-09-04

申请号：US14991017

申请日：2016-01-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kunihiko Yonezu ,  Takehiro Oba ,  Hisaharu Nishio ,  Ginjiro Ito ,  Yuichi Yamada

IPC: G01N33/00 ,  F01N13/00 ,  F02M35/10

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.

公开(公告)号：US09957873B2

公开(公告)日：2018-05-01

申请号：US14990947

申请日：2016-01-08

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Kunihiko Yonezu ,  Takehiro Oba ,  Hisaharu Nishio ,  Ginjiro Ito ,  Yuichi Yamada

IPC: G01N27/407 ,  F01N11/00 ,  G01N27/406 ,  F02M35/10 ,  F02M57/00

CPC classification number: F01N11/007 ,  F02M35/10373 ,  F02M57/005 ,  G01N27/406 ,  G01N27/4062 ,  G01N27/4078

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.