| 摘要 |
PURPOSE: A multi-line coil is used to make an ignition spark generating device to improve cutting efficiency and a stable structure. CONSTITUTION: An ignition spark generating device comprises a coil spark wheel(10) to make spark by friction with a lighter stone. The coil spark wheel is fixed by a wheel assembly. More than two coils are wound concentrically to form the coil spark wheel. A first coil(11), a second coil(12) and a third coil(13) are wound concentrically to form the coil spark wheel. The starting points and the ending points of the coils form a regular angle. The wheel assembly is formed between right and left side wheel.
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