Abstract: A solenoid includes a coil, a cylindrical sliding core, a columnar plunger, a bottomed cylindrical yoke including a cylindrical portion and a bottom portion that is connected to the cylindrical portion and faces a base end surface of the plunger, and the bottomed cylindrical yoke configured to accommodate the coil, the sliding core, and the plunger, a magnetic attraction core arranged to face a distal end surface of the plunger, and a magnetic flux transfer member that transfers magnetic flux between the sliding core and the yoke. When the plunger is closest to the magnetic attraction core, a position of the base end surface of the plunger along an axial direction is the same as position of the end of the sliding core along the axial direction, or is closer to the bottom portion side of the sliding core along the axial direction than the end of the sliding core.

Abstract: A solenoid includes: a coil; a plunger; a yoke including a side wall provided along the axial direction and a bottom opposed to a base end surface of the plunger; and a stator core including a magnetic attraction core, a slide core, and a magnetic flux passage restricting portion. The slide core includes: a core portion; and a first magnetic flux transmitting portion expanding radially outward from an end portion of the core portion and transmits magnetic flux between the yoke and the plunger through the core portion. The magnetic flux passage restricting portion restricts passage of the magnetic flux between the slide core and the magnetic attraction core. A second magnetic flux transmitting portion transmits the magnetic flux between the magnetic attraction core and the side wall. The first magnetic flux transmitting portion is pressed and in contact with at least one of the side wall or the bottom.

Abstract: A solenoid includes a coil, a plunger, a yoke, and a stator core. The yoke includes a side wall and a bottom. The stator core includes a magnetic attraction core, a slide core, and a magnetic flux passage restricting portion. The slide core includes: a core portion formed in a tubular shape; and a first magnetic flux transmitting portion configured to transmit magnetic flux between the yoke and the plunger through the core portion. The magnetic flux passage restricting portion is configured to restrict passage of the magnetic flux between the slide core and the magnetic attraction core. A second magnetic flux transmitting portion is configured to transmit the magnetic flux between the magnetic attraction core and the side wall. An elastic member is arranged in contact with an end surface of the magnetic attraction core and is configured to bias the stator core toward the bottom.

Abstract: A solenoid includes a coil, a cylindrical sliding core, a columnar plunger, a bottomed cylindrical yoke including a cylindrical portion and a bottom portion that is connected to the cylindrical portion and faces a base end surface of the plunger, and the bottomed cylindrical yoke configured to accommodate the coil, the sliding core, and the plunger, a magnetic attraction core arranged to face a distal end surface of the plunger, and a magnetic flux transfer member that transfers magnetic flux between the sliding core and the yoke. When the plunger is closest to the magnetic attraction core, a position of the base end surface of the plunger along an axial direction is the same as position of the end of the sliding core along the axial direction, or is closer to the bottom portion side of the sliding core along the axial direction than the end of the sliding core.