| 主权项 |
1. A linear solenoid comprising:
a coil that is formed into an annular form; a shaft that is placed on an inner side of the coil in a radial direction and is configured to reciprocate in an axial direction; a first stationary core that includes:
a first bearing portion, which slidably supports one end portion of the shaft; anda fixing portion, which outwardly extends from the first bearing portion in the radial direction, wherein the first bearing portion and the fixing portion are seamlessly and integrally formed; a second stationary core that includes:
a second bearing portion, which slidably supports the other end portion of the shaft that is opposite from the one end portion of the shaft in the axial direction;a magnetic flux conducting portion, which is configured into a tubular form and is placed between the second bearing portion and the coil in the radial direction, wherein an air gap is interposed between the magnetic flux conducting portion and the first stationary core in the axial direction; anda connecting portion, which connects between one end part of the second bearing portion and one end part of the magnetic flux conducting portion on an axial side that is opposite from the first stationary core in the axial direction; a yoke that is located on an outer side of the coil in the radial direction and magnetically couples between the first stationary core and the second stationary core; and a movable core that includes:
a holding portion, which securely holds the shaft at a corresponding location that is located between the first bearing portion and the second bearing portion in the axial direction; anda magnetic flux conducting portion that is placed between the second bearing portion and the magnetic flux conducting portion of the second stationary core in the radial direction and extends from the holding portion in the axial direction toward the connecting portion of the second stationary core, wherein: when the coil is energized, the movable core is moved toward the first stationary core and conducts a magnetic flux between the first stationary core and the second stationary core through the movable core; a radially outer part of the first bearing portion has an axial end surface, which is axially opposed to the movable core; the first bearing portion has a through-hole, which receives the shaft; one axial end of the through-hole of the first bearing portion, which is located on the movable core side, has a peripheral edge that is placed at a corresponding axial position; and the corresponding axial position of the peripheral edge of the axial end of the through-hole is on an axial side of the axial end surface of the radially outer part, which is opposite from the movable core in the axial direction. |
