公开(公告)号：US20240241097A1

公开(公告)日：2024-07-18

申请号：US18499573

申请日：2023-11-01

申请人： NGK INSULATORS, LTD.

发明人： Yuya SEIKE ,  Shintaro MAKI ,  Kohei YAITA ,  Kota KATAGIRI

IPC分类号： G01N33/00

CPC分类号： G01N33/0009 ,  G01M15/102

摘要： Provided is a gas sensor that is low in risk of erosion of an elastic body even when the gas sensor is shortened and prevents a lead retaining portion from coming into contact with an inner surface of a through-hole of the elastic body or closing the through-hole. In the gas sensor according to one aspect of the present invention, one diameter-reduced portion for fixing the elastic body to a tubular body is provided, the lead retaining portion is apart from a front end surface of the elastic body by 0.1 mm or more, and a size or the like of each member is adjusted to satisfy a predetermined relational expression, thereby preventing the occurrence of contact misalignment.

公开(公告)号：US20230314364A1

公开(公告)日：2023-10-05

申请号：US18185579

申请日：2023-03-17

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Kohei YAITA ,  Takaaki ISHII ,  Yuya SEIKE

IPC分类号： G01N27/407 ,  G01N27/406

CPC分类号： G01N27/4078 ,  G01N27/4062

摘要： A gas sensor includes: a sensor element including a sensing part on one end portion thereof; a casing; and a connector disposed in the casing to electrically connect the sensor element to an outside, wherein the casing includes: an outer tube including a main portion in which a reference gas is included and a sealing portion with a diameter smaller than the main portion so that another end portion of the sensor element protrudes to the main portion; a rubber seal member fitted into the sealing portion; and a spacer intervening between the seal member and the connector, and the spacer is secured by being sandwiched between the connector and the seal member due to friction force acting on a contact surface with the seal member which occurs by that load acts on the spacer from the seal member in accordance with reduction in the diameter by swaging.

公开(公告)号：US20220308008A1

公开(公告)日：2022-09-29

申请号：US17699707

申请日：2022-03-21

申请人： NGK Insulators, Ltd.

发明人： Hiroki ADACHI ,  Yuya SEIKE

IPC分类号： G01N27/407

摘要： A gas sensor is capable of realizing a stable crimped shape even when the crimp portion of the housing is pressed from above during manufacture. The gas sensor includes a holding member that holds part of a sensor element. A housing accommodates the sensor element and the holding member and includes a tubular main body and tubular crimp portion. The crimp portion is located closer to a rear end than the main body, and presses, in a partially bent state, a rear end of the holding member. The crimp portion has a bending point at which a thickness changes more significantly than in each of a portion close to the main body and a portion close to the rear end, or is a point at which a degree of change in the thickness changes between the portion close to the main body and the portion close to the rear end.

公开(公告)号：US20240241012A1

公开(公告)日：2024-07-18

申请号：US18415478

申请日：2024-01-17

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Kohei YAITA ,  Yuya SEIKE

IPC分类号： G01M15/10

CPC分类号： G01M15/102

摘要： Provided is a gas sensor that prevents risks such as deterioration of airtightness of the interior of an outer tube, rupture of an elastic body, and occurrence of the displacement of a contact point without swaging a rear end side of the outer tube to have a tapered shape. In the gas sensor according to one aspect of the present invention, a diameter of a reduced diameter portion formed on a rear end side of a tubular body and swaging the elastic body is constant in the axial direction, and a value of a comprehensive parameter which is an index for evaluating the deformation of the elastic body is 0.038 or more and 0.171 or less.

公开(公告)号：US20240142418A1

公开(公告)日：2024-05-02

申请号：US18489980

申请日：2023-10-19

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Satoru SHIRAISHI ,  Kohei YAITA ,  Yuya SEIKE ,  Daiki HAMAMOTO

IPC分类号： G01N33/00

CPC分类号： G01N33/0009

摘要： Provided is a gas sensor including a housing made of metal through which a sensor element is inserted and an outer cylinder made of metal welded to an outer periphery of the housing, in which generation of pinholes on a surface of a welded portion is suppressed. In a gas sensor according to one aspect of the present invention, a contact distance Lg, which is a length in an axial direction of an outer peripheral surface of a housing in contact with an inner peripheral surface of an outer cylinder on a rear end side with respect to a molten portion of the outer cylinder formed by welding, is equal to or less than a reference distance Lr.

公开(公告)号：US20230168220A1

公开(公告)日：2023-06-01

申请号：US17994221

申请日：2022-11-25

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Yuya SEIKE ,  Kohei YAITA

IPC分类号： G01N27/407

CPC分类号： G01N27/407 ,  G01N27/4078

摘要： A gas sensor for sensing a predetermined gas component contained in a measurement gas includes: a sensor element including a sensing part on a side of one end portion thereof; and a casing in which the sensor element is contained and secured, including: an outer tube including a main portion in which a reference gas is present and into which the other end portion of the sensor element protrudes and a sealing portion being an end portion having a smaller diameter than the main portion; and a first seal member and a second seal member fit into the sealing portion in a two-tiered configuration to seal the outer tube, the first seal member is made of rubber, and the second seal member is made of resin more heat resistant than the first seal member, and is disposed closer to the sensor element than the first seal member is.

公开(公告)号：US20240319154A1

公开(公告)日：2024-09-26

申请号：US18609516

申请日：2024-03-19

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Kohei YAITA ,  Yuya SEIKE ,  Satoru SHIRAISHI

IPC分类号： G01N33/00 ,  G01D11/24 ,  G01D11/26

CPC分类号： G01N33/0037 ,  G01D11/245 ,  G01D11/26

摘要： A possibility is suppressed that a gripping position of a gripping member is moved by an external impact and a gripping force is reduced. In a gas sensor according to one aspect of the present invention, a gripping member that grips a portion covered with a tube in an outer peripheral surface of a cylindrical body such that the tube protrudes to a side opposite to an open end of the cylindrical body grips an outer peripheral surface covered with the tube of a caulked portion closest to the open end among one or more caulked portions formed in the cylindrical body.

公开(公告)号：US20240280532A1

公开(公告)日：2024-08-22

申请号：US18414648

申请日：2024-01-17

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Kohei YAITA ,  Yuya SEIKE ,  Satoru SHIRAISHI

IPC分类号： G01N27/406 ,  G01N27/407

CPC分类号： G01N27/4062 ,  G01N27/4078

摘要： Provided is a gas sensor that reduces a possibility that a terminal fitting electrically connecting a sensor element and a lead wire to each other breaks due to vibrations applied to the gas sensor. In the gas sensor according to one aspect of the present invention, a value obtained by dividing a second distance db, which is a distance from a start end that is an end of a reduced diameter portion of a tubular body on a frontmost end side to a positioning fixture of the terminal fitting, by a first distance Da, which is a distance from the start end to a protrusion of the tubular body, is 0.24 or more and 0.39 or less.

公开(公告)号：US20230314365A1

公开(公告)日：2023-10-05

申请号：US18187041

申请日：2023-03-21

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Kohei YAITA ,  Yuya SEIKE

IPC分类号： G01N27/407 ,  G01M15/10 ,  G01N27/406

CPC分类号： G01N27/4078 ,  G01M15/102 ,  G01N27/4062

摘要： A gas sensor includes: a sensor element including a sensing part on a side of one end portion thereof; a casing; and a connector disposed in the casing to electrically connect the sensor element to an outside, wherein the casing includes: an outer tube including a main portion in which a reference gas is included and a sealing portion being an end portion having a smaller diameter than the main portion, another end portion of the sensor element protruding to the main portion, a rubber seal member fitted into the sealing portion to seal the outer tube, and a spacer intervening between the seal member and the connector in the outer tube. The spacer includes a concave portion in an end surface on a side having contact with the connector, and has contact with the connector in the end surface except for the concave portion.

公开(公告)号：US20230228701A1

公开(公告)日：2023-07-20

申请号：US18082461

申请日：2022-12-15

申请人： NGK INSULATORS, LTD.

发明人： Shintaro MAKI ,  Kota KATAGIRI ,  Kohei YAITA ,  Yuya SEIKE

IPC分类号： G01N27/407 ,  G01M15/10 ,  G01N27/406

CPC分类号： G01N27/407 ,  G01M15/102 ,  G01N27/4062

摘要： A gas sensor for sensing a predetermined gas component contained in a measurement gas includes: a sensor element including a sensing part on one end portion thereof; a casing in which the sensor element is contained and secured; and a connector disposed in the casing, wherein the casing includes: an outer tube including a main portion in which a reference gas is included and a sealing portion as an end portion with a diameter smaller than the main portion so that another end portion of the sensor element protrudes to the main portion, a rubber seal member fitted into the sealing portion to seal the outer tube, and a spacer intervening between the seal member and the connector, and the spacer includes: a resin first spacer contacting with the seal member and having higher heat resistance than the seal member and a ceramic second spacer contacting with the connector.