Solenoid device and electromagnetic valve for fuel injection system

A solenoid device configured to drive by electromagnetic force a valve unit in an electromagnetic valve provided to a fuel injection system, the solenoid device comprising:

• a cylindrical core made from a magnetic material;
• a coil that is wound around the core;
• a casing that houses the core and the coil and covers at least one end of the core on one side in an axial direction of a center axis;
• a terminal fixing member that is disposed between the core and the casing in the axial direction to fix a terminal connected to the coil, made from a resin material;
• and
• a cylindrical member that is disposed on an inner circumference of the core in a manner of passing through the core and the casing in the axial direction, the cylindrical member having a protrusion that radially protrudes in a direction perpendicular to the axial direction and is held between the casing and the terminal fixing member from both sides in the axial direction, the cylindrical member having an end on another side of the axial direction located at a position that is allowed to come into contact with the valve unit, wherein
• the cylindrical member has its end portion on the opposite side of the axial direction in a coplanar state with the end portion of the valve unit side of the core, or protruding toward the valve unit side of the core relative to the end portion of the valve unit side of the core.