Collapsible structure particularly for use as a cot or bed

A collapsible structure (2 or 3) comprising first and second elongate members (4 and 5) which each have first and second ends (6 and 7, and 8 and 9) and are pivotally interconnected to form a first frame (10);

• first and second sleeves (11 and 12) respectively connected, for pivotal movement, to the first ends (6 and 8) of the first and second elongate members (4 and 5);
• first and second support arms (13 and 14) respectively slidable within the first and second sleeves (11 and 12) and each having first and second ends (15 and 16, and 17 and 18);
• first and second stops (19 and 20) respectively provided at the first ends (16 and 17) of the first and second support arms (13 and 14);
• first and second cross-braces (21 and 22) respectively provided with first ends (23 and 24) pivotally connected to the second ends (16 and 18) of the first and second support arms (13 and 14), respectively, and respectively provided with second ends (25 and 26) pivotally connected at or adjacent the second ends (9 and 7) of the second and first elongate members (5 and 4), respectively;
• and
• support means (27, 28, 36 to 39, 44 to 47, 52 and 53) for limiting the separation of the second ends (16 and 18) of the first and second support arms (13 and 14);
• characterised in that:
• the support means comprise:
• third and fourth elongate members (27 and 28) which each have first and second ends (29 and 30, and 31 and 32) and are pivotally interconnected to form a second X-frame (33);
• third and fourth sleeves (36 and 37) respectively connected, for pivotal movement, to the first ends (29 and 31) of the third and fourth elongate members (27 and 28);
• third and fourth support arms (38 and 39) respectively slideable within the third and fourth sleeves (36 and 37) and each having first and second ends (40 and 41, and 42 and 43);
• third and fourth stops (44 and 45) respectively provided at the first ends (40 and 42) of the third and fourth support arms (38 and 39);
• and
• third and fourth cross-braces (46 and 47) respectively provided with first ends (48 and 49) pivotally connected to the second ends (41 and 43) of the third and fourth support arms (38 and 39), respectively, and respectively provided with second ends (50 and 51) pivotally connected at or adjacent the second ends (32 and 30) of the fourth and third elongate members (28 and 27), respectively;
• the second ends (16 and 41) of the first and third support arms (13 and 38) are interconnected and are each pivotable about an axis which extends perpendicular to a plane defined by the axes of the first and third support arms (13 and 38) and the axes of the first and third cross-braces (21 and 46);
• and
• the second ends (18 and 43) of the second and fourth support arms (14 and 39) are interconnected and are each pivotable about an axis which extends perpendicular to a plane defined by the axes of the second and fourth support arms (18 and 39) and the axes of the second and fourth cross-braces (22 and 47).