Valve driving device and shock absorber using the same

A valve driving device for a damping force adjustment type shock absorber, the valve driving device comprising:

• a bobbin with a cylindrical body portion;
• a coil wound around the body portion of the bobbin;
• an armature that is arranged on a radially inner side of the bobbin and fixed to a rod;
• an anchor that covers one side in an axial direction of the armature at a position on a radially inner side of the bobbin;
• a yoke partially arranged between the bobbin and the anchor;
• and
• a cylindrical member arranged between the bobbin and the armature,
• wherein
• the bobbin includes a recessed portion on the radially inner side,
• a part of the cylindrical member is inserted into the recessed portion,
• the one part of the cylindrical member and the recessed portion are arranged so as to be laminated in the radial direction, and
• the armature operates in an axial direction to take a position where the one part of the cylindrical member and the recessed portion are laminated and a position where the one part of the cylindrical member and the recessed portion are not laminated in the radial direction.