Electromagnetic valve
AssigneeSMC Corporation
InventorsHideharu Sato, Shinichi Yoshimura
Life of this patent
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Abstract
An electromagnetic manipulating portion of an electromagnetic valve includes a fixed iron core fixedly disposed in the inside hole of a bobbin and a movable iron core movably disposed in the inside hole and attracted to the fixed iron core by a magnetic attraction force. The fixed iron core and the movable iron core are composed of the same normally magnetic material in the same shape and in the same size and have compatibility each other.
Claims11
An electromagnetic valve, comprising a main valve portion having a valve member for switching a flow path and an electromagnetic manipulating portion for manipulating the valve member,
- wherein the electromagnetic manipulating portion comprises,
- a hollow bobbin around which an exciting coil is wound,
- a fixed iron core fixed in an inside hole of the bobbin,
- a movable iron core movably disposed in the inside hole of the bobbin, coupled with the valve member, and attracted to the fixed iron core by a magnetic attraction force generated by energizing the exciting coil, and
- an iron core return spring for returning the movable iron core to an initial position at which the movable iron core is spaced apart from the fixed iron core, and
- wherein the fixed iron core and the movable iron core are formed so as to have magnetic properties that are the same, to have an external overall surface shape that is the same, and to have overall external size dimensions that are the same so that the fixed iron core and the movable iron core have compatibility so as to be interchangeable with each other, and wherein the fixed iron core and the moveable iron core each comprise a main portion having a same predetermined sectional shape and size dimension and flange portion of the same external shape and size dimensions formed at an end of the main portion in an axis line direction so as to swell to a same extent in an outer peripheral direction and having a length in the axis line direction shorter than that of the main portion.
Dependencies are inferred from the claim text.