| 摘要 |
A knocked-down sparkplug characterized in that the main component parts may be disassembled and reassembled, and comprises a sparkplug body including the electrodes (1), a fastening nut (2), a ceramic insulator including the inner (3), and a ceramic ring (4). The sparkplug body including its electrodes (1) and the ceramic insulator ceramic including its inner (3) are firmly united by using a fastening nut (2). And in order not to allow in occurring of possibly short circuit between the sparkplug body including its electrodes (1) and the ceramic insulator including its inner (3), to impend the electric current it is provided a ceramic ring on the sparkplug body. The knocked-down sparkplug of present invention is easier in maintenance, because the main component parts may be disassembled as well as the damaged component parts may be replaced easier, so that it substantially will reduce the maintenance cost.
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