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AssigneeDenso Corporation
InventorsSeiji Tachibana, Hiroyuki Nakane, Mitsuhiro Watanabe, Naoya Suda, Yoshitaka Kamiya
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In a magnetic driving device, a fixed core has a housing portion, in which a plunger is housed to reciprocatingly move, and an attracting portion toward which the plunger is attracted upon energizing a coil. The housing portion is provided with a ring portion, which is formed by machining an outer circumference wall thereof and whose thickness is thinner than that of a part of the housing portion adjacent to the ring portion to an extent that mechanical strength of the housing portion is not damaged. The ring portion is provided with a plurality of through-holes penetrating radially the wall thereof. A magnetic flux area of the ring portion is limited due to the thin wall and the through-holes so that magnetic resistance is enlarged.
An electromagnetic driving device comprising;
Dependencies are inferred from the claim text.