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公开(公告)号：US08729785B2
公开(公告)日：2014-05-20
申请号：US13685008
申请日：2012-11-26
发明人： Takuya Shimamura , Jiro Kyuno
IPC分类号： H01T13/00
摘要： A spark plug comprises an insulator and a metal shell. The insulator includes a nose length portion at the forward end, and a tapered portion, extending from the rear end of the nose length portion toward the rear end of the insulator, increased in diameter toward the rear end. The metal shell includes a shoulder portion, protruding inward and having a retaining surface by which the tapered portion is retained, and a male thread portion on the outer peripheral side of the shoulder portion, and the thread diameter of the male thread portion is set to M12 or less. When the insulator's cross-sectional area, perpendicular to an axis, passing through the boundary between the nose length section and tapered portion is B (mm2), and the metal shell's cross-sectional area, perpendicular to the axis, passing through the tip of the retaining surface is C (mm2), 2.80≦C/B≦3.50 is satisfied.
摘要翻译： 火花塞包括绝缘体和金属壳。 绝缘体包括在前端的鼻长部分，并且从鼻长度部分的后端延伸到绝缘体的后端的锥形部分朝向后端直径增加。 金属壳包括：向内突出并具有保持锥形部的保持面的肩部，肩部的外周侧的外螺纹部，外螺纹部的螺纹直径设定为 M12以下。 当绝缘体的垂直于轴线的横截面积通过鼻长部分和锥形部分之间的边界为B（mm2）时，金属壳的横截面积垂直于轴线，穿过尖端 保持面为C（mm2），2.80＆nlE; C / B＆nlE; 3.50。
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公开(公告)号：US09455553B2
公开(公告)日：2016-09-27
申请号：US14767022
申请日：2014-02-12
发明人： Takuya Shimamura , Jiro Kyuno
IPC分类号： H01T13/08
CPC分类号： H01T13/08
摘要： A spark plug includes a metal shell formed with a mounting male thread portion and a radially outwardly protruding seat portion and a solid annular gasket disposed between the male thread portion and the seat portion. The gasket has a recessed portion formed with a depth in the direction of an axis such that the recessed portion has an opening at a front end surface of the gasket (18) located opposite to the seat portion. The front end surface of the gasket includes an inner peripheral front end surface region decreasing in thickness toward an inner periphery of the gasket and an outer peripheral front end surface region formed radially outside the inner peripheral front end surface region. The opening of the recessed portion is located radially inside an innermost periphery of the outer peripheral front end surface region.
摘要翻译： 火花塞包括形成有安装外螺纹部分和径向向外突出的座部分的金属壳和设置在阳螺纹部分和座部之间的实心环形垫圈。 垫圈具有凹部，该凹部在轴线方向上形成有深度，使得凹部在位于与座部相对的垫圈（18）的前端表面处具有开口。 垫圈的前端面包括朝向垫圈的内周减小的内周前端面区域和形成在内周前端面区域的径向外侧的外周前端面区域。 凹部的开口位于外周前端面区域的最内周侧的径向内侧。
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公开(公告)号：US20130134857A1
公开(公告)日：2013-05-30
申请号：US13685008
申请日：2012-11-26
发明人： Takuya Shimamura , Jiro Kyuno
IPC分类号： H01T13/16
摘要： A spark plug comprises an insulator and a metal shell. The insulator includes a nose length portion at the forward end, and a tapered portion, extending from the rear end of the nose length portion toward the rear end of the insulator, increased in diameter toward the rear end. The metal shell includes a shoulder portion, protruding inward and having a retaining surface by which the tapered portion is retained, and a male thread portion on the outer peripheral side of the shoulder portion, and the thread diameter of the male thread portion is set to M12 or less. When the insulator's cross-sectional area, perpendicular to an axis, passing through the boundary between the nose length section and tapered portion is B (mm2), and the metal shell's cross-sectional area, perpendicular to the axis, passing through the tip of the retaining surface is C (mm2), 2.80≦C/B≦3.50 is satisfied.
摘要翻译： 火花塞包括绝缘体和金属壳。 绝缘体包括在前端的鼻长部分，并且从鼻长度部分的后端延伸到绝缘体的后端的锥形部分朝向后端直径增加。 金属壳包括：向内突出并具有保持锥形部的保持面的肩部，肩部的外周侧的外螺纹部，外螺纹部的螺纹直径设定为 M12以下。 当绝缘体的垂直于轴线的横截面积通过鼻长部分和锥形部分之间的边界为B（mm2）时，金属壳的横截面积垂直于轴线，穿过尖端 保持面为C（mm2），满足2.80 @ C / B @ 3.50。
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公开(公告)号：US10355458B2
公开(公告)日：2019-07-16
申请号：US16161469
申请日：2018-10-16
发明人： Takuya Shimamura
摘要： Disclosed is a production method of a spark plug in which a ground electrode has an electrode base and a tip welded to a surface of the electrode base via a weld metal. The production method includes an image capture step, an image analysis step and an inspection step. The image capture step is to capture image data about the surface of the electrode base to which the tip has been welded. The image analysis step is to perform analysis of the image data, thereby detecting an edge of the electrode base and an edge of the weld metal, determining a center point of a contour of the weld metal and then detecting an edge of the tip in a specific area of the image data. The inspection step is to inspect a welding position of the tip based on the detected edges of the electrode base and the tip.
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公开(公告)号：US20150194792A1
公开(公告)日：2015-07-09
申请号：US14417321
申请日：2013-02-27
发明人： Takuya Shimamura
摘要： A spark plug includes an insulating insulator and a metal shell. The metal shell includes a caulking portion, a seat portion with a tapering surface, a thread portion with a thread size equal to or less than M12, and a protrusion. The insulating insulator includes a lock portion locked to the protrusion, and is secured to the metal shell in a state held between the caulking portion and the protrusion.
摘要翻译： 火花塞包括绝缘绝缘体和金属壳。 金属壳包括铆接部，具有锥形表面的座部，螺纹尺寸等于或小于M12的螺纹部和突起。 绝缘绝缘体包括锁定在突出部上的锁定部，并且在保持在铆接部与突起之间的状态下固定在金属壳上。
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公开(公告)号：US10297983B2
公开(公告)日：2019-05-21
申请号：US15926358
申请日：2018-03-20
发明人： Takuya Shimamura
IPC分类号： H01T21/02 , G05B19/4097 , H01T13/20 , H01T13/58
摘要： A spark plug has an electrode including a base portion and a tip joined to a specific surface that is a specific outer surface of the base portion, the tip forming a spark discharge surface. Respective relative positions of a plurality of points on an outer surface of a target portion of the electrode including the base portion and the tip joined to the base portion, which is a portion including at least a portion of the specific surface of the base portion and the tip, are identified to generate three-dimensional coordinate data representing the three-dimensional shape of the target portion. The coordinate data is analyzed to determine whether the target portion of the electrode includes a predetermined unintentional portion that is an unintended portion. An electrode including the unintentional portion is excluded from objects to be manufactured, and an electrode not including the unintentional portion is used to assemble the spark plug.
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公开(公告)号：US09166379B2
公开(公告)日：2015-10-20
申请号：US14417321
申请日：2013-02-27
发明人： Takuya Shimamura
摘要： A spark plug includes an insulating insulator and a metal shell. The metal shell includes a caulking portion, a seat portion with a tapering surface, a thread portion with a thread size equal to or less than M12, and a protrusion. The insulating insulator includes a lock portion locked to the protrusion, and is secured to the metal shell in a state held between the caulking portion and the protrusion.
摘要翻译： 火花塞包括绝缘绝缘体和金属壳。 金属壳包括铆接部，具有锥形表面的座部，螺纹尺寸等于或小于M12的螺纹部和突起。 绝缘绝缘体包括锁定在突出部上的锁定部，并且在保持在铆接部与突起之间的状态下固定在金属壳上。
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