US 12,488,923 B2
Solenoid, damping force adjustment mechanism, and damping force adjustable shock absorber
Miho Shimazaki, Hitachinaka (JP); Milton Muzvidziwa, Hitachinaka (JP); and Koichi Yamaka, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Appl. No. 18/274,887
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Feb. 9, 2022, PCT No. PCT/JP2022/005009
§ 371(c)(1), (2) Date Jul. 28, 2023,
PCT Pub. No. WO2022/181319, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 2021-026852 (JP), filed on Feb. 23, 2021.
Prior Publication US 2024/0083208 A1, Mar. 14, 2024
Int. Cl. H01F 7/16 (2006.01); B60G 17/015 (2006.01)
CPC H01F 7/16 (2013.01) [B60G 17/015 (2013.01); B60G 2500/11 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A solenoid comprising:
a coil wound into an annular shape and configured to generate magnetic force by being energized;
a mover comprising a magnetic element provided to be movable in a winding axis direction of the coil; and
a stator arranged to face the mover,
the stator in which an outer peripheral convex portion, an inner peripheral convex portion, and a concave indent portion located between the outer peripheral convex portion and the inner peripheral convex portion, the concave indent portion to which an opposed surface of the mover is substantially parallel are formed;
the mover and the stator being so configured that, when no current is being applied, axial distance between the outer peripheral convex portion of the stator and an outer peripheral portion of the mover which is radially closest to the outer peripheral convex portion is smaller than axial distance between the inner peripheral convex portion of the stator and an inner peripheral portion of the mover which is radially closest to the inner peripheral convex portion.