Abstract: A method for manufacturing a contact terminal including a contact portion that slides against a surface of a conductive contact plate. The manufacturing method includes forming a projection in a metal plate by performing a drawing process, wherein the projection projects in a thicknesswise direction of the metal plate and has a larger diameter than the contact portion. The manufacturing method further includes forming the contact portion from the projection by performing a contraction pressing process at least once on the projection so that the diameter of the projection gradually decreases, while the height of the projection remains the same or decreases in a stepwise manner.

Abstract: A rotation plate including a surface, in which a fixed contact terminal slides in contact with the surface of the rotation plate. The rotation plate includes a movable contact plate and a holding member. The movable contact plate forms a predetermined conductive pattern. The holding member holds the movable contact plate and is formed from an insulating resin material. The movable contact plate and the holding member are molded integrally and fixed to each other so that a surface of the movable contact plate is exposed and does not project outward from a surface of the holding member.

Abstract: A bearing is positioned relative to a rotatable shaft by inserting the bearing over the rotatable shaft until the bearing contacts a flange of the rotatable shaft, which is cold-forged on the rotatable shaft. The bearing is fixed to the rotatable shaft such that a swaged portion is formed in an outer peripheral portion of the rotatable shaft on an opposite axial side of the bearing, which is axially opposite from the flange, by swaging a corresponding part of the outer peripheral portion of the rotatable shaft such that the corresponding part of the outer peripheral portion of the rotatable shaft is radially outwardly bulged to form the swaged portion, and the swaged portion is axially pressed against the bearing to axially securely clamp the bearing between the swaged portion and the flange.

Abstract: A rotation plate including a surface, in which a fixed contact terminal slides in contact with the surface of the rotation plate. The rotation plate includes a movable contact plate and a holding member. The movable contact plate forms a predetermined conductive pattern. The holding member holds the movable contact plate and is formed from an insulating resin material. The movable contact plate and the holding member are molded integrally and fixed to each other so that a surface of the movable contact plate is exposed and does not project outward from a surface of the holding member.

Abstract: A bearing is positioned relative to a rotatable shaft by inserting the bearing over the rotatable shaft until the bearing contacts a flange of the rotatable shaft, which is cold-forged on the rotatable shaft. The bearing is fixed to the rotatable shaft such that a swaged portion is formed in an outer peripheral portion of the rotatable shaft on an opposite axial side of the bearing, which is axially opposite from the flange, by swaging a corresponding part of the outer peripheral portion of the rotatable shaft such that the corresponding part of the outer peripheral portion of the rotatable shaft is radially outwardly bulged to form the swaged portion, and the swaged portion is axially pressed against the bearing to axially securely clamp the bearing between the swaged portion and the flange.