An elastic miniaturized hinge (10a, 10b, 10c) for use with a flexible temple of eyeglasses, the hinge comprising: - a box, suitable for affixing to the temple of the eyeglasses, said box being provided at its front end with an opening; - a lug configured to be joined to the front of the eyeglasses; - a housing formed in said box, said housing comprising a trolley (30, 80, 90) composed of a tie-rod body; - said trolley (30, 80, 90) having an articulation at one end thereof and said articulation extending outwardly of the opening and having a through-hole; - at least one spring (32, 33, 81, 91) positioned in said housing and bearing against said trolley (30, 80, 90); and - a guiding zone formed peripherally at said opening of said housing, said guiding zone having a first protrusion and a second protrusion in spaced parallel relationship to each other and extending longitudinally outwardly therefrom, said first protrusion having a cheek facing a cheek of said second protrusion, said articulation having a first lateral face and a second lateral face on opposite sides thereof, said first lateral face looking towards and being positioned against said first cheek of said first protrusion, said second lateral face looking towards and being positioned against second said cheek of said second protrusion; characterized in that - the lug has two parallel walls (61, 62), both provided with a corresponding hole; each of said first and second protrusions (23, 24) has a channel-shaped guiding seat or slot formed therein, said channel-shaped guiding seat or slot being longitudinally projected with respect to the sliding longitudinal axis of the trolley (30, 80, 90) and said guiding seat having an opening along the front border of the protrusion (23, 24) in such a way that, when the articulation is connected to the lug by inserting, between the walls of the lug, the two protrusions (23, 24), a connecting element passing through the holes and the guiding seats engages the articulation which is hinged in the through-hole. - a box, suitable for affixing to the temple of the eyeglasses, said box being provided at its front end with an opening; - a lug configured to be joined to the front of the eyeglasses; - a housing formed in said box, said housing comprising a trolley (30, 80, 90) composed of a tie-rod body; - said trolley (30, 80, 90) having an articulation at one end thereof and said articulation extending outwardly of the opening and having a through-hole; - at least one spring (32, 33, 81, 91) positioned in said housing and bearing against said trolley (30, 80, 90); and - a guiding zone formed peripherally at said opening of said housing, said guiding zone having a first protrusion and a second protrusion in spaced parallel relationship to each other and extending longitudinally outwardly therefrom, said first protrusion having a cheek facing a cheek of said second protrusion, said articulation having a first lateral face and a second lateral face on opposite sides thereof, said first lateral face looking towards and being positioned against said first cheek of said first protrusion, said second lateral face looking towards and being positioned against second said cheek of said second protrusion; characterized in that - the lug has two parallel walls (61, 62), both provided with a corresponding hole; each of said first and second protrusions (23, 24) has a channel-shaped guiding seat or slot formed therein, said channel-shaped guiding seat or slot being longitudinally projected with respect to the sliding longitudinal axis of the trolley (30, 80, 90) and said guiding seat having an opening along the front border of the protrusion (23, 24) in such a way that, when the articulation is connected to the lug by inserting, between the walls of the lug, the two protrusions (23, 24), a connecting element passing through the holes and the guiding seats engages the articulation which is hinged in the through-hole.