Many different types of collapsible frames of baby carriers are already known. A common feature of the known frames is, that the frames constitutes a pair of crossing legs piv¬ otally connected to each other in each sides. The conven¬ tional upper part of the frame supporting the box-type seat section frame is connected with suspension pivots to the conventional lower part of the frame carried out as a firm apparatus with lengthwise side members with crossing wheel axles. Clearly the disadvantage of the known collapsible frames are, that the box-type seat section and the wheels has to be disassembled to reduce the volume. Generally the known collapsible frames of baby carriers in collapsed state only reduce the height, but not the length disregard¬ ing that the handle is often foldable.

The invention provides a collapsible frame of baby carriers with collapsible box-type seat section and independent wheel suspension to be collapses without disassembly of ma¬ jor parts. By this the collapse is easy and at the same time the volume of baby carriers is reduced in the height and in the length and so it is easier to carry by one hand and in other ways it is easier to handle, storage and transport with other means of transportation. Due to the invention this is obtained by the fact that the frame of the baby carriers is carried out in accordance with claim 1 related to claim 2, 3, 4 and 5.

The frame of the baby carriers is of a kind in which the collapse of the entire baby carriers is triggered by a lock mechanism in each sides in which the collapse of the frame transfer the collapse force simultaneous to the moving piv¬ ots of the box-type seat section, so that the front part

and rear part of the box-type seat section proceeds towards each other into a compact collapsed stage.

Each leg of the frame constitutes a rail with a suspension cassette with axle for the wheel to be pushed upward along the leg exactly so that the wheel go clear of the leg and the ground in the collapsed state.

As follows the invention is further explained referring to the drawings.

Fig. 1 shows in principle from the left side and in collapsed state the collapsible baby carriers omitting the legs of the frame, the handle and the wheels.

Fig. 2 shows in principle from the left side the collapsible baby carriers, the legs of the frame, handle and wheels.

Fig. 3 shows generally the box-type seat section in its unfolded state omitting the bottom plates of the seat section, the folding top and the stuffing.

Fig. 4 shows the left side master hinged connec¬ tions with the front leg and the rear leg.

Fig. 5 shows the suspension cassette with spring lock.

The collapse mechanism is centered around two master hinge connections, one in each sides of the baby carriers carried out in prolongation of top end of each of four legs of the frame, which has a pivot 24 to fix the master hinge connec-

tions to the top edge of the shaft 25 of the box-type seat section frame.

The handle 2 in prolongation of fastening 23 is connected to the master hinge connections.

Each of the legs of the frame generally straight or curved with non-circular cross section 34 have at its upper end a pivotally connection 4 relating to diagonal members 6 of the box-type seat section.

The box-type seat section is of a frame type constituting an upper front rack 26 and an upper rear rack 27, a bottom front rack 28 with fasteners for the front bottom plates, a rear bottom rack 29 with fasteners for the rear bottom plates, a middle cross brace 30, a shaft 25 in each sides, two cross member 35, a front cross brace 15, two diagonal members 6. In all interconnected by nine pivots 7 in each sides.

A loch mechanism 8 either forward or rear positioned is to be pushed through master hinged connections 1 by the means of a spring-loaded pawl 5 into the female part 31, the male part 32 and the fastening 23 of the handle 2, thus fixing the frame legs 3, the handle 2 and the box-type seat sec¬ tion frame in unfolded stage.

In the lower part of each leg of the frame the wheel axle 9 sticks through a slot 10 and across suspension device 11 carried out as a cassette in the hollow of the leg 12 and fixed by a spring lock 13. Each of the leg constitutes a rail with a suspension device 11 with axle 9 for the wheel 14, which by triggering the spring lock 13 from the lower pairs of holes 22 is to be pushed upward along the slot 10 exactly so that the wheel go clear of the leg and the

ground in the collapsed state by snapping into the upper pairs of holes 16 to the spring lock.

Suspension device 11 is carried out with an upper sledge 17 serving, too, as fasten for spring lock 13, which is held by the spring lock spring 18 and a lower sledge 19 carried out in nylon or the like material with good friction, and with a separate wheel axle a cross. Upper and lower sledge are connected by a shaft 20 in each sides through springs 21 and a cross the lower sledge and in booths ends fastened by a pawl 33, thus providing the suspension effect from the lower sledge supported by springs 21 traveling with the axle 9 in direction of the upper sledge 17 by loading of the wheel 14. By a particular non-circular cross section 34 and the upper sledge 17 and the lower sledge 19 carried out in the same cross section corresponding the hollow of the leg 12 the fixing of wheel 14 and axle 9 are attained.

Cover in metal or plastic to protect master hinge connec- tions 1 is omitted from the drawings.

However, it should be stressed that the invention with the like advantages can be carried out with crossing axles for the wheels in stead of four separate axles.

Too, it should be stressed that the invention with the like advantages could be carried out with disassembly of box- type seat section and wheels.