A hinge

摘要

The hinge comprises a first hinge member (11) and a second hinge member (12). The first hinge member comprises a cylindrical housing (16) having first and second open ends (17 and 18 respectively). The cylindrical housing (16) is located between flange members (26 and 27) of the second hinge member (12). A torsion spring (20) is provided inside the cylindrical housing (16) and one end (21) fits into a recess (22) at end (18) of the cylindrical housing (16) and the other end fits into a recess (36) in a coupling element (30) which is located at the other end (17) of the cylindrical housing (16). The coupling element (30) has a hexagonal engagement surface (39) which engages a matching engagement surface in flange (27). By depressing the coupling element (30) so that it is no longer in engagement with flange member (27), the coupling element (30) can be turned so that its hexagonal external surface (39) is in a different orientation with respect to the matching hexagonal surface of the flange (27), when pressure on the coupling element is released.