Patent ID: 7926877

Claim:
A casing for a hinge attachment of a car seat, wherein first and second hinge parts and a toothed element of the casing are brought to final shape by fine blanking, comprising: a first hinge part connectable to a frame of a back of the seat; a second hinge part connectable to a frame of the seat; the first and second hinge parts including respective perpendicular edges which extend in a direction of a hinge axis, said perpendicular edges of said first and second hinge parts defining confronting surfaces at front ends thereof and thereby, being symmetrically formed with hollows therein, whereby, upon placing the first and second hinge parts in a confronting relationship a casing is collectively defined by the first and second hinge parts; a toothed element produced by fine blanking having a generally encircling shape receivable within the casing, said toothed element including toothing which extends over at least one segment of said generally encircling shape and which is radially directed to an inner side thereof; and a clamping ring holding together the edges of the hinge parts, radially inner sides of the perpendicular edges of the first and second hinge parts being formed as an inner abutment on the first and second hinge parts for said toothed element, the toothed element being secured at a bottom face of said toothed element by a horizontal seating provided in the first hinge part, the bottom face of the toothed element facing the first hinge part, the horizontal seating lying adjacent to the perpendicular edge of the first hinge part, whereby the horizontal seating is formed in a wall of the first hinge part, the seating in the first hinge part being positioned adjacent the inner abutment of the first hinge part, the seating being dimensioned to provide an interference fit for the toothed element when the toothed element is positioned in the seating, whereby the seating provides an interference fit between the toothed element and the first hinge part when the toothed element is positioned in the seating, an outer side of said toothed element being fixed to the perpendicular edge of one or more of the first and second hinge parts through a connection peripherally extending approximately alongside a central plane of said toothed element at an inner corner of the perpendicular edge of one or more of the first and second hinge parts, which substantially secures the toothed element in the direction of the hinge axis, wherein the toothed element provides a support function such that the wall thickness of the first and second hinge parts is reduced to allow the first and second hinge parts to be substantially brought into final shape by fine blanking with simpler, more cost effective tools.