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1. 发明公开

EP2190084A4 SPARK PLUG 有权转让
公开(公告)号：EP2190084A4
公开(公告)日：2013-04-17
申请号：EP08831218
申请日：2008-09-10
申请人： NGK SPARK PLUG CO
发明人： SUZUKI AKIRA , KATO TOMOAKI , MUSASA MAMORU , KYUNO JIRO
IPC分类号： H01T13/20 , H01T13/14 , H01T13/34
CPC分类号： H01T13/20 , H01T13/14 , H01T13/34 , H01T13/39

2. 发明公开

EP2323233A4 SPARK PLUG 有权转让
公开(公告)号：EP2323233A4
公开(公告)日：2014-10-22
申请号：EP09811466
申请日：2009-08-31
申请人： NGK SPARK PLUG CO
发明人： BAN KENJI , KYUNO JIRO , SUZUKI AKIRA
IPC分类号： H01T13/32 , H01T13/16 , H01T13/20 , H01T13/39
CPC分类号： H01T13/32 , H01T13/16 , H01T13/39

3. 发明公开

EP2650987A4 METHOD FOR MANUFACTURING SPARK PLUG 审中-公开
标题翻译：生产火花塞的方法
公开(公告)号：EP2650987A4
公开(公告)日：2014-09-03
申请号：EP12770810
申请日：2012-03-26
申请人： NGK SPARK PLUG CO
发明人： KYUNO JIRO , OZEKI KEIJI , KATO TOMOAKI
IPC分类号： H01T21/02 , H01T13/58
CPC分类号： H01T21/02 , H01T13/58
摘要： [Objective] To provide a technique for easily judging whether or not an insulator is cracked, in the process of manufacture of a spark plug. [Means for Solution] A method for manufacturing a spark plug includes an assembling step of assembling an insulator into a metallic shell through insertion of the insulator into the metallic shell from an axially rear end opening portion of the metallic shell. The assembling step includes a displacement restricting step of restricting a relative positional displacement between the metallic shell and the insulator in a radial direction intersecting with the axial direction so as to reduce eccentricity between the axis of the metallic shell and the axis of the insulator to a predetermined value or less while allowing a relative positional displacement between the metallic shell and the insulator in the axial direction. In the assembling step, whether or not the insulator is cracked in the assembling step is judged by detecting acoustic emission from the insulator.

4. 发明公开

EP2555354A4 SPARK PLUG 有权转让
标题翻译： ZÜNDKERZE
公开(公告)号：EP2555354A4
公开(公告)日：2013-12-25
申请号：EP11765208
申请日：2011-03-28
申请人： NGK SPARK PLUG CO
发明人： YAMADA YUICHI , KUKI HIROAKI , MIYASHITA NAOMICHI , KYUNO JIRO
IPC分类号： H01T13/36
CPC分类号： H01T13/36
摘要： [Objective] To provide a technique capable of improving breakage resistance of an insulator of a spark plug. [Means for Solution] In a cross-section including an axial line of a spark plug, the following relationship is satisfied: 0.6 mm
摘要翻译： [目的]提供一种能够提高火花塞的绝缘体的耐破损性的技术。 [解决手段]在包括火花塞的轴线的截面中，满足以下关系：0.6mm < = L，其中，“A”表示绝缘体的支撑部分和相对于绝缘体的支撑部分形成在前端侧处的绝缘体主体部分之间的连接点，其中“B”表示靠近外部的位置（a）绝缘体的支撑部分和填料彼此接触的接触部分的最内部位置和（b）绝缘体的支撑部分与虚拟直线的交点平行于轴线并且从金属壳的台阶部分的最内圆周端部延伸，并且其中“L”表示从点“A”到点“B”的路径的长度沿着绝缘子。

5. 发明公开

EP2216862A4 SPARK PLUG 有权转让
公开(公告)号：EP2216862A4
公开(公告)日：2016-11-09
申请号：EP08854967
申请日：2008-11-25
申请人： NGK SPARK PLUG CO
发明人： KYUNO JIRO , SUZUKI AKIRA , BAN KENJI
IPC分类号： H01T13/20 , H01T13/38
CPC分类号： H01T13/20 , H01T13/38
摘要： A spark plug is such that a front end portion of an insulating member projects 2 mm or larger from a front end face of a metal shell and a volume of a portion of the insulating member which lies within a range from a front end of the insulating member to a position lying 1 mm towards a rear end side from the front end is 11 mm 3 or smaller. When assuming that a corner portion where a front end face of the insulating member intersects a side surface of an axial hole is referred to as a position PA, a position on a center electrode where a straight-line distance from the position PA to the center electrode within the axial hole is referred to as a position PB, a position where the insulating member first contacts the metal shell from the front end face of the insulating element along a surface of the insulating element is referred to as a position PC, and a position on the insulating element where a straight line BC which connects the position PB with the position PC contacts the surface of the insulating member when the straight line BC is displaced parallel towards an outside of an axis is referred to as a position PD, a parallel displacement amount E by which the straight line BC is displaced parallel until it contacts the position PD is 0.75 mm or larger. According to the spark plug configured in this way, even though the spark plug is shaped small, the occurrence of lateral spark and inside spark can be suppressed effectively.

6. 发明公开

EP2383847A4 SPARK PLUG 失效转让
标题翻译： ZÜNDKERZE
公开(公告)号：EP2383847A4
公开(公告)日：2015-04-22
申请号：EP09834871
申请日：2009-12-22
申请人： NGK SPARK PLUG CO
发明人： KYUNO JIRO , SUZUKI AKIRA , MUSASA MAMORU
IPC分类号： H01T13/36 , H01T13/16 , H01T13/20
CPC分类号： H01T13/36 , H01T13/16
摘要： [Objective] To provide a spark plug which is configured such that an insulation member, from which a center electrode projects, is pressed frontward and held in a metallic shell, and is fixed by means of crimping the rear end of the metallic shell, and which can prevent a drop in gastightness between the metallic shell and the insulation member due to a difference in thermal expansion therebetween. [Means for Solution] In a spark plug in which a mating shaft portion (10) of an insulation member (1) is loose-fitted into a mating hole portion (30) of a metallic shell (21), a filler (41) for maintaining gastightness is charged between the outer circumferential surface of the mating shaft portion (10) and the inner circumferential surface of the mating hole portion (30). Despite the thermal expansion difference, the gastightness is maintained, because the filler (41) for maintaining gastightness is charged between the inner and outer circumferential surfaces.
摘要翻译： [目的]提供一种火花塞，其构造成使得中心电极突出的绝缘构件被向前按压并保持在金属壳中，并且通过压接金属壳的后端固定，以及这可以防止由于它们之间的热膨胀差异而在金属壳和绝缘构件之间的气密性降低。 [解决方案]在将绝缘构件（1）的配合轴部分（10）松配合到金属壳（21）的配合孔部分（30）中的火花塞中，填充物（41）为了保持气密性，在配合轴部（10）的外周面与配合孔部（30）的内周面之间进行充填。尽管存在热膨胀差异，但是由于用于保持气密性的填充物（41）被填充在内周面和外周面之间，因此保持气密性。

7. 发明公开

EP2479855A4 SPARK PLUG 有权转让
公开(公告)号：EP2479855A4
公开(公告)日：2014-01-08
申请号：EP11826542
申请日：2011-08-08
申请人： NGK SPARK PLUG CO
发明人： SHIMAMURA TAKUYA , KATO TOMOAKI , KYUNO JIRO , MIYASHITA NAOMICHI
IPC分类号： H01T13/36 , H01T13/20
CPC分类号： H01T13/36
摘要： Disclosed is a spark plug having an insulator capable of achieving good breakage resistance by modifying the state of contact of the insulator with a plate packing and the like without increase in insulator thickness. A spark plug 1 contains a ceramic insulator 2, a plate packing 22 and a metal shell 3. The ceramic insulator 2 has, on an outer circumferential surface thereof, a step portion 14 having an outer diameter decreasing toward the front in the direction of an axis CL1 and a leg portion 13 extending toward the front in the direction of the axis CL1. The metal shell 3 has, on an inner circumferential surface thereof, a taper portion 21 having an inner diameter decreasing toward the front in the direction of the axis CL1. The ceramic insulator 2 is fixed in the metal shell 3 with the step portion 14 retained on the taper portion 21 via the plate packing 22. The ceramic insulator 2 also has a curved surface portion 31 formed into a concave shape on the outer circumferential surface thereof at a position between the step portion 14 and the leg portion 13. Herein, 50% or more of an inner circumferential edge portion IP of the plate packing 22 in a circumferential direction thereof is in contact with a part of the ceramic insulator 2 located front of a middle region CP of the curved surface portion 31.

8. 发明公开

EP2958203A4 IGNITION PLUG 有权转让
公开(公告)号：EP2958203A4
公开(公告)日：2016-10-26
申请号：EP14752103
申请日：2014-02-12
申请人： NGK SPARK PLUG CO
发明人： SHIMAMURA TAKUYA , KYUNO JIRO
IPC分类号： H01T13/08 , F02P13/00
CPC分类号： H01T13/08
摘要： Provided is a spark plug capable of achieving both of air tightness and high gasket detachment resistance. The spark plug (1) includes a metal shell (3) and a solid annular gasket (18). The metal shell (3) has a mounting male thread portion (15) and a radially outwardly protruding seat portion (16). The gasket (18) is disposed between the male thread portion (15) and the seat portion (16). The gasket (18) has a recessed portion (41) formed with a depth in the direction of an axis (CL1) such that the recessed portion (41) has an opening at a surface of the gasket (18) located opposite to the seat portion (16). The gasket (18) includes an inner peripheral front end surface region (351) formed such that a distance from a reference plane (VS), which passes through a rear end of the recessed portion (41) and extends perpendicular to a center line (CL2) of the gasket (18), to the inner peripheral front end surface region (351) decreases toward an inner periphery of the gasket (18) and an outer peripheral front end surface region (352) formed radially outside the inner peripheral front end surface region (351). The opening of the recessed portion (14) is located radially inside an innermost periphery of the outer peripheral front end surface region (352).

9. 发明公开

EP2634872A4 SPARK PLUG 审中-公开
公开(公告)号：EP2634872A4
公开(公告)日：2015-02-25
申请号：EP11835766
申请日：2011-08-18
申请人： NGK SPARK PLUG CO
发明人： NAKAMURA MAI , KYUNO JIRO , KATO TOMOAKI
IPC分类号： H01T13/36
CPC分类号： H01T13/36
摘要： To provide a technique capable of firmly holding a ceramic insulator by a crimp portion of a metal shell even though a diameter of a spark plug is reduced in size. A spark plug 100 includes a ceramic insulator 10 having a tapered rear end side step portion 15 whose a diameter tapering from a front end side to a rear end side and a metal shell 50 having a crimp portion 53 which crimps the rear end side step portion 15 from the rear end side. In the spark plug 100, an area S defined by an outer edge of the rear end side step portion 15 and an inner edge of the crimp portion 53 falls within a range of 5 mm 2 to 25 mm 2 when the spark plug 100 is projected on a plane perpendicular to an axial line of the spark plug 100. Further, an angle ¸1 formed by a tapered face of the rear end side step portion 15 and a plane perpendicular to the axial line falls within a range of 20 degrees to 60 degrees. Furthermore, a distance L along the axial line from a front end of a proximal portion of the crimp portion 53 to a frontmost position of a contact portion between an inner face of the crimp portion 53 and the rear end side step portion 15 falls within a range of 0.4 mm to 1.8 mm.

10. 发明公开

EP2541703A4 SPARK PLUG 有权转让
公开(公告)号：EP2541703A4
公开(公告)日：2014-07-09
申请号：EP10846453
申请日：2010-09-28
申请人： NGK SPARK PLUG CO
发明人： KYUNO JIRO , SUZUKI AKIRA
IPC分类号： H01T13/20 , H01T13/36
CPC分类号： H01T13/36 , H01T21/02

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