A spring hinge for spectacles comprising two side pieces and a central part, comprising - a U-shaped hinge element having two hinge eyes (11, 11'), - a spring element, - a housing, which has a cavity for accommodating the hinge element and the spring element and which is also part of the side pieces and/or part of the central part of the spectacles, and comprising - a closure part, which holds the hinge element in the housing, wherein - the closure part can be arranged between arms (13, 13') of the U-shaped hinge element and in the cavity of the housing and - can be fixedly defined in the housing by means of a fastening device, and wherein - at least one surface of the closure part bears on the inner surface of the cavity in the housing, wherein - the closure part has a base body, the width of which corresponds to the distance between the arms (13, 13') of the hinge element, so that the base body is arranged between the arms (13, 13') without play, characterised in that - at least one protrusion (59, 59'), which protrudes into the cavity parallel to the longitudinal extension of the cavity, starts from the base body of the closure part, wherein - the at least one protrusion (59, 59'), which starts from the base body of the closure part, bears on surfaces (49, 49') or on an underside of the arms (13, 13') of the hinge element, wherein - the width of the at least one protrusion (59, 59') is larger than the width of the base body, so that the at least one protrusion (59, 59') bears on the surfaces (49, 49') or the underside of the arms (13, 13'), wherein - the hinge element, the spring element, and the closure part form a pre-assemblable assembly, so that the hinge element, the spring element, and the closure part can be inserted into the cavity as a whole, and wherein - the housing has a first opening, wherein the base body has a second opening, wherein a screw, a grub screw or a pin can protrude through the first opening into the second opening, in order to fix the closure part in the cavity. - a U-shaped hinge element having two hinge eyes (11, 11'), - a spring element, - a housing, which has a cavity for accommodating the hinge element and the spring element and which is also part of the side pieces and/or part of the central part of the spectacles, and comprising - a closure part, which holds the hinge element in the housing, wherein - the closure part can be arranged between arms (13, 13') of the U-shaped hinge element and in the cavity of the housing and - can be fixedly defined in the housing by means of a fastening device, and wherein - at least one surface of the closure part bears on the inner surface of the cavity in the housing, wherein - the closure part has a base body, the width of which corresponds to the distance between the arms (13, 13') of the hinge element, so that the base body is arranged between the arms (13, 13') without play, - at least one protrusion (59, 59'), which protrudes into the cavity parallel to the longitudinal extension of the cavity, starts from the base body of the closure part, wherein - the at least one protrusion (59, 59'), which starts from the base body of the closure part, bears on surfaces (49, 49') or on an underside of the arms (13, 13') of the hinge element, wherein - the width of the at least one protrusion (59, 59') is larger than the width of the base body, so that the at least one protrusion (59, 59') bears on the surfaces (49, 49') or the underside of the arms (13, 13'), wherein - the hinge element, the spring element, and the closure part form a pre-assemblable assembly, so that the hinge element, the spring element, and the closure part can be inserted into the cavity as a whole, and wherein - the housing has a first opening, wherein the base body has a second opening, wherein a screw, a grub screw or a pin can protrude through the first opening into the second opening, in order to fix the closure part in the cavity.