US 12,463,518 B2
Solenoid actuator
Takeshi Kudo, Takizawa (JP); and Toshiki Ogasawara, Takizawa (JP)
Assigned to MIKUNI CORPORATION, Tokyo (JP)
Filed by MIKUNI CORPORATION, Tokyo (JP)
Filed on Sep. 15, 2023, as Appl. No. 18/467,870.
Claims priority of application No. 2022-200563 (JP), filed on Dec. 15, 2022.
Prior Publication US 2024/0204641 A1, Jun. 20, 2024
Int. Cl. H02K 41/02 (2006.01); H02K 7/08 (2006.01); H02K 16/04 (2006.01)
CPC H02K 41/02 (2013.01) [H02K 7/08 (2013.01); H02K 16/04 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A solenoid actuator, comprising:
a coil;
a first stator and a second stator disposed with an air gap therebetween in an axial direction so as to form a magnetic path around the coil; and
a mover configured to be movable in the axial direction to a maximum stroke position from an original position on a radially inner side of the first stator toward the second stator by a magnetic force generated by energizing the coil,
the mover having an annular projection projecting in the axial direction from a peripheral edge portion of the mover,
the second stator including:
a second yoke; and
a second press part made of a magnetic material and disposed on an inner peripheral side of the second yoke so as to at least partially form an annular recess for receiving the annular projection of the mover at the maximum stroke position, and
the second press part including:
a rim section located on an outermost peripheral side of the second press part and extending in the axial direction from a bottom of the annular recess toward the first stator; and
a ridge section located on an inner peripheral side of the rim section and ridged from the bottom of the annular recess toward the mover so as to define the annular recess together with the rim section.