Solenoid for electromagnetic valve
AssigneeSMC Corporation
InventorsHideharu Sato, Yoshio Aso, Shinichi Yoshimura, Takumi Matsumoto
Life of this patent
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Abstract
A magnetic body case in a solenoid for an electromagnetic valve has a cylindrical skirt portion which surrounds a side face of a bobbin and a cap portion which covers one end face of the bobbin in an axial direction thereof, these skirt portion and cap portion are respectively formed individually, and the magnetic body case is assembled by coupling the cap portion to one end of the skirt portion in the axial direction.
Claims7
A solenoid for an electromagnetic valve which is mounted to an electromagnetic valve to drive a valve member for switching flow paths, the solenoid comprising:
- a bobbin which has an iron core hole extending in an axial direction thereof at a center and which has a coil wound around an outer periphery thereof;
- a magnetic body case which is provided with a cylindrical skirt portion which surrounds a side face of the bobbin and a cap portion covering one end face of the bobbin in the axial direction;
- an annular magnetic body plate which is connected to an inside of the magnetic body case on the side of the other end face of the bobbin;
- a movable iron core which is movably received in an iron core hole positioned at centers of the bobbin and the magnetic body plate;
- a fixed magnetic pole member which attracts the movable iron core;
- and
- a return spring which biases the movable iron core in a direction of separating from the fixed magnetic pole member,
- wherein the skirt portion and the cap portion in the magnetic body case are formed individually of each other, the magnetic body case is assembled by coupling the cap portion into one end of the skirt portion in the axial direction, and the sectional shapes of the iron core hole and the movable iron core are elliptic and the sectional shape of the magnetic body case is rectangular.
Dependencies are inferred from the claim text.