Solenoid

A solenoid comprising:

• a coil configured to generate magnetic force when energized;
• a plunger formed in a columnar shape, arranged radially inside the coil, and configured to slide in an axial direction;
• a yoke that houses the coil and the plunger and includes:
• a side wall provided along the axial direction;
• and
• a bottom provided along a direction that intersects the axial direction and opposed to a base end surface of the plunger;
• a stator core that includes:
• a magnetic attraction core that is opposed to a front end surface of the plunger in the axial direction and configured to magnetically attract the plunger by magnetic force generated by the coil;
• a slide core that includes:
• a core portion formed in a tubular shape and arranged radially outside the plunger;
• and
• a first magnetic flux transmitting portion fixed to an outer peripheral surface of an end portion of the core portion opposed to the bottom and configured to transmit magnetic flux between the yoke and the plunger through the core portion;
• and
• a magnetic flux passage restricting portion configured to restrict passage of the magnetic flux between the slide core and the magnetic attraction core;
• a second magnetic flux transmitting portion arranged radially outside an end portion of the magnetic attraction core located on an opposite side from the plunger in the axial direction and configured to transmit the magnetic flux between the magnetic attraction core and the side wall;
• and
• an elastic member arranged in contact with an end surface of the magnetic attraction core on an opposite side from the plunger in the axial direction and configured to bias the stator core toward the bottom.