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    • 9. 发明授权
    • Spark plug having fusion zone
    • 火花塞具有熔接区
    • US09257817B2
    • 2016-02-09
    • US13880623
    • 2011-11-17
    • Akira Suzuki
    • Akira Suzuki
    • H01T13/20H01T13/32H01T21/02
    • H01T13/20H01T13/32H01T21/02
    • A spark plug (1) includes a center electrode (5), an insulator (2), a metallic shell (3), a ground electrode (27), and a noble metal tip (32) provided on at least one object member of the center electrode and the ground electrode. One end surface of the noble metal tip is joined to the object member via a fusion zone (35). The fusion zone includes a first fusion zone (351) formed through radiation of a laser beam or the like to the boundary between the object member and the one end surface of the noble metal tip along a perimetrical direction of the noble metal tip, and a second fusion zone (352) formed through radiation of the laser beam or the like from the side from which the laser beam or the like has been radiated in forming the first fusion zone, and intersecting with the first fusion zone.
    • 火花塞(1)包括设置在至少一个物体上的中心电极(5),绝缘体(2),金属壳(3),接地电极(27)和贵金属电极头(32) 中心电极和接地电极。 贵金属电极头的一个端面通过熔接区域35接合到物体部件上。 熔融区包括沿着贵金属电极头的周边方向通过激光束等照射到贵金属电极顶端的物体与贵金属端头的边界之间的边界而形成的第一熔融区域, 第二熔融区(352),其通过从形成第一熔融区的激光束等的一侧的激光束等的辐射形成,并与第一熔融区相交。