Solenoid, damping force adjustment mechanism, and damping force adjustable shock absorber

A damping force adjustment mechanism comprising:

• a coil wound into an annular shape and configured to generate magnetic force by being energized;
• an accommodating member comprising a magnetic element arranged at the inner periphery of the coil, extending in a winding axis direction of the coil, and provided with an accommodating portion with one end opened;
• a mover provided in the accommodating portion so as to be movable in the winding axis direction of the coil and comprising a magnetic element;
• a control valve configured to be controlled by motion of the mover;
• a stator provided at such a position as to face an opening of the accommodating portion and so configured that a protruding portion protruding toward the opening of the accommodating portion and a lateral face portion extending from an outer periphery of the protruding portion in a direction away from the opening of the accommodating portion are integrally formed by a magnetic element;
• a yoke including a fixing hole with an inner peripheral surface facing a part of the lateral face portion of the stator, and
• a joining member configured to be joined to an inner periphery of the yoke at an outer periphery on one side in a winding axis direction of the coil and joined to an outer periphery of the accommodating member at an inner periphery on the other side, the joining member comprising a non-magnetic element.

A damping force adjustable shock absorber comprising:

• a cylinder in which hydraulic fluid is sealingly contained;
• a piston slidably provided in the cylinder;
• a piston rod coupled with the piston and extending out of the cylinder, and
• a damping force adjustment mechanism configured to control a flow of the hydraulic fluid which is generated by sliding motion of the piston within the cylinder to generate a damping force, the damping force adjustment mechanism comprising:
• a coil wound into an annular shape and configured to generate magnetic force by being energized;
• an accommodating member comprising a magnetic element arranged at the inner periphery of the coil, extending in a winding axis direction of the coil, and provided with an accommodating portion with one end opened;
• a mover provided in the accommodating portion so as to be movable in the winding axis direction of the coil and comprising a magnetic element;
• a control valve configured to be controlled by motion of the mover;
• a stator provided at such a position as to face an opening of the accommodating portion and so configured that a protruding portion protruding toward the opening of the accommodating portion and a lateral face portion extending from an outer periphery of the protruding portion in a direction away from the opening of the accommodating portion are integrally formed by a magnetic element;
• a yoke including a fixing hole with an inner peripheral surface facing a part of the lateral face portion of the stator, and
• a joining member configured to be joined to an inner periphery of the yoke at an outer periphery on one side in a winding axis direction of the coil and joined to an outer periphery of the accommodating member at an inner periphery on the other side, the joining member comprising a non-magnetic element.