Patent ID: 7874042

Claim:
A spring hinge for spectacles having a central hinge lobe ( 4 ) guided so it is displaceable in a bow-side housing ( 1 ) in the bow longitudinal direction and having a U-shaped sliding part ( 3 ) projecting from the hinge lobe ( 4 ) in the displacement direction and engaging in a housing recess ( 2 ), which receives a coiled spring ( 10 ) between its two legs ( 7 ), which is supported at one end on the web ( 6 ) connecting the two legs ( 7 ) of the U-shaped sliding part ( 3 ) and at the other end on a buttress ( 11 ), which is held removably in the housing ( 1 ) by a rotational adjustment coaxial to the coiled spring ( 10 ), the hinge lobe ( 4 ) having a through opening ( 17 ) running coaxially to the coiled spring ( 10 ), wherein the buttress ( 11 ) inserted transversely to the displacement direction between the legs ( 7 ) of the sliding part ( 3 ) has a greater diameter than the through opening ( 17 ) provided in the hinge lobe ( 4 ) for the insertion of a tool for the rotational adjustment of the buttress ( 11 ).