Abstract: A headrest device ensures the movement of a headrest frame body to a stay and enables a foaming resin molding of a headrest. A support portion having a semicircular cross section and restricting portions having an approximately U-shape cross section are formed on a plate body. Two sheets of plate bodies are connected with each other in an opposed manner. Then, a headrest pad made of foaming resin is integrally formed with the plate bodies.

Abstract: A reclining device for a vehicle seat is composed of first and second arm members connected with each other for relative rotation about a hinge center axis line. The second arm member is formed with a semi-circular internal tooth portion concentrical with the hinge center axis line. A slide pawl is slidably supported on the first arm member to be moved in a radial direction with respect to the hinge center axis line and has a semi-circular external tooth portion engageable with the internal tooth portion of second arm member. A release shaft is rotatably supported on the first arm member coaxially with the hinge center axis line and is loaded by a spring in a rotational direction. A release arm is integrally formed with one end of the release shaft to rotate the release shaft against the load of the spring.