Casing for apparatus provided with a flexible or articulated windable element

A casing, for the housing of apparatus which is provided with a windable element, said casing comprising

• a central core with a surface of revolution defining an inner volume for said housing of apparatus, said core being formed of two hollow half-cylinders, each of said half-cylinders comprising two plane faces, said half-cylinders may be brought together to a closed position of said casing along a plane containing the common longitudinal axis of said half-cylinders and which may be moved relative to each other to an open position of said casing,
• two substantially circular cheeks formed of two contiguous half-cheeks having a mean radius greater than that of the said half-cylinders, each one of the four said half-cheeks being integral with one of the two plane faces of one of the two hollow half-cylinders of the said central core,
• an aperture located through the surface of revolution of said central core at a point where the said surface of revolution intersects the said plane, said aperture emerging in said inner volume, said aperture allowing passage of the said windable element the winding of which about the surface of revolution of the central core maintaining the casing in its closed position enclosing the said apparatus, the unwinding of the said windable element allowing the two hollow half-cylinders to break up, which allows egress of the said apparatus from within said casing.