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1. 发明授权

EP2846425B1 Spark plug 有权转让
公开(公告)号：EP2846425B1
公开(公告)日：2018-10-31
申请号：EP14183601.5
申请日：2014-09-04
申请人： NGK Spark Plug Co., Ltd.
发明人： Kita, Jumpei , Yoshida, Haruki , Mizuno, Takamitsu
IPC分类号： H01T13/05 , H01T13/34 , H01T21/02
CPC分类号： H01T13/08 , H01T13/05 , H01T13/32 , H01T13/34 , H01T13/41 , H01T21/02
摘要： A spark plug (1) includes an insulator (2), a terminal electrode (6), a center electrode (5), a resistor (7), and a glass seal layer (8). The terminal electrode (6) has: a recess part (6D) opened to the front end side and having a depth in a center axis (CL2) direction of the terminal electrode (6); and a flat part (6E) neighboring the recess part (6D) at its outer circumference side. A (mm 2 ) which represents an area of a region surrounded by an outline of an outer circumference surface of the terminal electrode (6), and B (mm 2 ) which represents an area of a region of the terminal electrode (6) surrounded by an outline of an inner surface of the recess part (6D) in a cross section orthogonal to the center axis (CL2) and located 0.1 mm away from a front end along the center axis (CL2) to the rear end side, satisfies 0.52 ‰¤ B/A ‰¤ 0.91.

2. 发明公开

EP2846425A1 Spark plug 有权转让
标题翻译：火花塞
公开(公告)号：EP2846425A1
公开(公告)日：2015-03-11
申请号：EP14183601.5
申请日：2014-09-04
申请人： NGK Spark Plug Co., Ltd.
发明人： Kita, Jumpei , Yoshida, Haruki , Mizuno, Takamitsu
IPC分类号： H01T13/05 , H01T13/34 , H01T21/02
CPC分类号： H01T13/08 , H01T13/05 , H01T13/32 , H01T13/34 , H01T13/41 , H01T21/02
摘要： A spark plug (1) includes an insulator (2), a terminal electrode (6), a center electrode (5), a resistor (7), and a glass seal layer (8). The terminal electrode (6) has: a recess part (6D) opened to the front end side and having a depth in a center axis (CL2) direction of the terminal electrode (6); and a flat part (6E) neighboring the recess part (6D) at its outer circumference side. A (mm 2 ) which represents an area of a region surrounded by an outline of an outer circumference surface of the terminal electrode (6), and B (mm 2 ) which represents an area of a region of the terminal electrode (6) surrounded by an outline of an inner surface of the recess part (6D) in a cross section orthogonal to the center axis (CL2) and located 0.1 mm away from a front end along the center axis (CL2) to the rear end side, satisfies 0.52 ≤ B/A ≤ 0.91.
摘要翻译：火花塞（1）包括绝缘体（2），端子电极（6），中心电极（5），电阻器（7）和玻璃密封层（8）。端子电极（6）具有向前端侧开口且在端子电极（6）的中心轴线（CL2）方向上具有深度的凹部（6D）。和在其外周侧与凹部（6D）相邻的平坦部（6E）。表示由端子电极（6）的外周面的轮廓包围的区域的面积的A（mm2）和表示由端子电极（6）包围的端子电极（6）的区域的面积的B（mm2）所述凹部（6D）的与所述中心轴线（CL2）正交的截面中的沿着所述中心轴线（CL2）至所述后端侧的前端0.1mm的内表面的轮廓满足0.52≤B / A≤0.91。

3. 发明授权

EP3001518B1 SPARK PLUG 有权转让
公开(公告)号：EP3001518B1
公开(公告)日：2018-08-29
申请号：EP15186698.5
申请日：2015-09-24
申请人： NGK Spark Plug Co., Ltd.
发明人： Kita, Jumpei , Yoshida, Haruki
IPC分类号： H01T13/04 , H01T13/20 , H01T13/34
CPC分类号： H01T13/04 , H01T13/20 , H01T13/34
摘要： A spark plug having an insulator that includes a first portion which accommodates a front end of the metallic terminal. A portion of the metallic terminal has a roughened surface portion with a Vickers hardness of 200 Hv or greater and 320 Hv or smaller. A first ratio of an outside diameter of the roughened surface corresponding to at least a part of the first portion of the insulator to the first bore diameter of the insulator is 0.90 or greater. A second ratio of the first bore diameter to the second bore diameter of the insulator is 0.80 or greater and 0.98 or smaller.

4. 发明公开

EP3001518A1 SPARK PLUG 有权转让
标题翻译：火花塞
公开(公告)号：EP3001518A1
公开(公告)日：2016-03-30
申请号：EP15186698.5
申请日：2015-09-24
申请人： NGK Spark Plug Co., Ltd.
发明人： Kita, Jumpei , Yoshida, Haruki
IPC分类号： H01T13/04 , H01T13/20 , H01T13/34
CPC分类号： H01T13/04 , H01T13/20 , H01T13/34
摘要： A spark plug having an insulator that includes a first portion which accommodates a front end of the metallic terminal. A portion of the metallic terminal has a roughened surface portion with a Vickers hardness of 200 Hv or greater and 320 Hv or smaller. A first ratio of an outside diameter of the roughened surface corresponding to at least a part of the first portion of the insulator to the first bore diameter of the insulator is 0.90 or greater. A second ratio of the first bore diameter to the second bore diameter of the insulator is 0.80 or greater and 0.98 or smaller.
摘要翻译：一种具有绝缘体的火花塞，该绝缘体包括容纳金属端子的前端的第一部分。金属端子的一部分具有维氏硬度为200Hv以上且320Hv以下的粗糙表面部分。对应于绝缘体的第一部分的至少一部分的粗糙表面的外径与绝缘体的第一孔径的第一比率为0.90或更大。绝缘体的第一孔直径与第二孔直径的第二比例为0.80或更大且0.98或更小。

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