Patent ID: 8973894
Filing Date: 2015-03-10
Classification: F16K,H01F

Abstract:
1. A solenoid comprising: a plunger having a central axis in an axial direction and movable in the axial direction, the plunger being provided with a plunger projection and a core receiving portion, the plunger projection extending coaxially with the central axis and having a diameter smaller than a diameter of the plunger; a core provided to face the plunger in the axial direction and including a core projection and a plunger receiving portion having a center hole at a center of the core, the center hole having a bottom to face the end portion of the plunger projection; an electromagnetic coil configured to pull the plunger toward the core while the electromagnetic coil is energized, the core receiving portion of the plunger being to receive the core projection while the electromagnetic coil is energized, the plunger receiving portion of the core being to receive the plunger projection while the electromagnetic coil is energized; a casing housing the plunger, the core, and the electromagnetic coil; at least one of an end portion of the plunger projection and an end portion of the core projection having an acute angle in a cross section along the axial direction; and a distance between the end portion of the plunger projection and the end portion of the core projection being shortest among distances between the core and the plunger while the electromagnetic coil is not energized.