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    • 91. 发明授权
    • Spark plug and method of manufacturing the same
    • 火花塞和制造方法相同
    • US06414420B1
    • 2002-07-02
    • US09488473
    • 2000-01-20
    • Akira Suzuki
    • Akira Suzuki
    • H01T1320
    • H01T13/12H01T13/36
    • A spark plug according to this invention includes an insulator having a center through-hole formed therein, a center electrode held in the center through-hole, a metallic shell holding the insulator by swaging, and a ground electrode electrically connected to the metallic shell and defining a spark discharge gap in cooperation with the center electrode. The metallic shell has a male-threaded portion formed on the outer circumferential surface of a front end portion of the metallic shell, and a tightening portion formed on the outer circumferential surface of the metallic shell, located at a rear side with respect to the male-threaded portion. The tightening portion has a width-across-flats W of not greater than 14 mm. A cushion material is filled into a space defined by the metallic shell and an insulator to form a cushion-material charged portion. The cushion-material charged portion has an axial length L of from 0.5 mm to 10.0 mm inclusive and a thickness M of from 0.5 mm to 1.3 mm inclusive.
    • 根据本发明的火花塞包括其中形成有中心通孔的绝缘体,保持在中心通孔中的中心电极,通过模锻保持绝缘体的金属壳和与金属壳电连接的接地电极, 与中心电极配合定义火花放电间隙。 所述金属壳体具有形成在所述金属壳体的前端部的外周面上的阳螺纹部,以及形成在所述金属壳体的外周面上的紧固部,位于相对于所述金属壳体的后侧 线程部分。 紧固部分具有不大于14mm的宽度跨平坦W。 衬垫材料填充到由金属壳和绝缘体限定的空间中以形成缓冲材料带电部分。 缓冲材料带电部分的轴向长度L为0.5mm至10.0mm,厚度为0.5mm至1.3mm。
    • 99. 发明公开
    • Spark plug
    • Zündkerze
    • EP2706630A2
    • 2014-03-12
    • EP13183972.2
    • 2013-09-11
    • NGK SPARK PLUG CO., LTD.
    • Kyuno, Jiro
    • H01T13/12H01T13/36
    • H01T13/08H01T13/12H01T13/36
    • A spark plug includes a tubular insulator, and a tubular metal shell secured to an outer peripheral surface of the insulator by crimping. The tubular metal shell includes: an inner peripheral surface in which powder for sealing is filled between the outer peripheral surface and the inner peripheral surface; a tool engagement portion overhanging in a polygonal shape; and a crimped lid disposed at an end portion of the metal shell coupled to the tool engagement portion, the end portion being bent toward the outer peripheral surface of the insulator by crimping. A relationship between a length L and a thickness t satisfies 2.50 ≤ L/t ≤ 3.10, the length L being along a shape of the crimped lid from the tool engagement portion to the insulator in a planar surface that passes through the axis, the thickness t being a thickness at an intermediate portion of the crimped lid.
    • 火花塞包括管状绝缘体和通过卷曲固定到绝缘体的外周表面的管状金属壳。 管状金属壳包括:内周面,其中密封用粉末填充在外周面和内周面之间; 多边形突出的工具接合部; 以及设置在与所述工具接合部接合的所述金属外壳的端部的卷边盖,所述端部通过卷边朝向所述绝缘体的外周面弯曲。 长度L和厚度t之间的关系满足2.50‰L / t‰3.10,长度L沿着通过轴线的平面中从工具接合部到绝缘体的压接盖的形状, 厚度t是压接盖的中间部分处的厚度。