Folding child cart

Abstract: It includes a structure (1,2,3,4) provided with wheels (5), means (7) for locking the structure of the pushchair in unfolded position and means of unlocking for unlocking the structure and allowing the pushchair to be folded, said structure being made up of a number of articulated bars (1,3,4) linked to each other, with two of said bars (1) defining two handles (2) on their upper ends so that so that the user can guide the pushchair, and is characterised in that said means of unlocking are made up of a pair of pushbuttons (6) fitted on said handles (2), which when operated unlock the articulations of the bars which form the structure of the pushchair.

Description: This invention relates to a foldable child pushchair, the folding of which can be carried out very conveniently from the handles. Known in the state of the art are foldable child pushchairs which can be transported and stowed conveniently due to their adopting a folded position when they are not in use. These currently known child pushchairs are made up of a structure of bars articulated together and a seat which is usually of textile material formed in the centre of said structure. So that the child pushchair has a stable position when in use, it includes means for locking the articulations of the structure, which means are at a low height from the ground. The main disadvantage presented by these child pushchairs is that folding them is very inconvenient, since said articulations have to be unlocked manually and directly at the articulations themselves at a height which is inconvenient, since the user has to bend down or carry out the unlocking using a foot. Closest prior art document US-A-4 848 787 discloses as featured in the preamble of independent claim 1 a foldable child pushchair, which includes a structure provided with wheels, means for locking the structure of the pushchair in unfolded position and manual means for unlocking the structure and allowing the pushchair to be folded, with said structure being made up of a number of articulated bars linked to each other, two of said bars defining two handles at their upper ends so that the user can guide the pushchair. The child pushchair of the invention resolves said disadvantages, while presenting other advantages which will be described below. The foldable child pushchair of the invention, which includes a structure provided with wheels, means for locking the structure of the pushchair in unfolded position and manual means for unlocking the structure and allowing the pushchair to be folded, with said structure being made up of a number of articulated bars linked to each other, two of said bars defining two handles at their upper ends so that the user can guide the pushchair, is characterised in that said manual means of unlocking are made up of a pair of pushbuttons fitted on said handles, which when operated unlock the articulations of the bars which form the structure of the pushchair. Thanks to this feature it is possible to fold the child pushchair of the invention very easily and conveniently simply by acting upon the pushbuttons on the handles and pushing in a forward direction. This means that the unlocking is carried out using the hands, without any need to bend down or unlock using a foot. This structure of the pushchair includes two side assemblies of articulated bars, with said assemblies being joined together by means of a number of similarly articulated bars, and with each of said assemblies of side bars being made up of an upper bar which defines the handle and by first and second lower bars provided with wheels at their lower part, the first lower bar being substantially aligned with the upper bar in the unfolded position of the child pushchair. According to a preferred embodiment of the invention, said means for locking the structure in unfolded position include a movable body fitted close to the upper end of said first lower bar, said movable body including an orifice for housing the lower end of the upper bar, with said movable body being associated with elastic means which push it upwards and cause locking of the lower end of the upper bar in the interior of the orifice of the movable body. According to said embodiment, said means of unlocking include a movable rod fitted inside said upper bar, said movable rod being associated with the pushbutton fitted onto the handle, in such a way that acting upon the pushbutton causes the rod to move, abutting in the orifice of the movable body and moving it against the action of the elastic means a sufficient distance for the lower end of the upper bar to be left outside said orifice, thus permitting folding of the structure of the pushchair. Preferably, said movable rod is associated with said pushbutton by means of a lever with interposition of elastic means between the lever and the pushbutton. According to a preferred embodiment, said orifice is a circular slot. For a better understanding of all that has been described in this specification, some drawings are attached which, solely by way of example, show a practical case of embodiment of the foldable child pushchair of the invention. In said drawings, Figure 1 is a side elevation view of the structure of the foldable child pushchair of the invention; Figure 2 is a side elevation view of the zone of articulation of the three bars which make up one of the side assemblies of the substructure, with the arms in the position they adopt when the child pushchair is unfolded; Figure 3 is a side elevation view of one of the handles in cross-section in the position in which the pushbutton has not been pressed; Figure 4 is a side elevation view of one of the handles in cross-section in the position in which the pushbutton has been pressed; Figure 5 is a side elevation view of the zone of articulation of the three arms which make up one of the side assemblies of the structure, with the movable body in the position it adopts when the pushbuttons are pressed; and Figure 6 is a side elevation view of the zone of articulation of the three arms which make up one of the side assemblies of the structure, with the arms in the position they adopt when the child pushchair is being folded. As is known, the majority of foldable child pushchairs include a structure made up of two side assemblies of articulated bars, said assemblies being linked together by a number of bars which are also articulated. One of these assemblies is shown in Figure 1, and is made up of an upper bar 1 which defines a handle 2 on its upper part, and by first and second lower bars 3, 4 provided with wheels 5 on their lower parts, with the first lower bar 3 being substantially in alignment with the upper bar 1 when the child pushchair is in unfolded position. Said handles 2 include a pushbutton 6 for unlocking the articulations of the arms and allowing the pushchair to be folded, as will be described in detail below. Figure 2 shows the arrangement of the bars making up one of the side assemblies in the unfolded position of the child pushchair of the invention. These bars are locked by means of a movable body 7 fitted close to the upper end of the first lower bar 3. This movable body 7 includes an orifice 8, preferably a circular slot, for housing the lower end of the upper bar 1. The movable body 7 has associated with it a spring 9 which pushes it upward, in such a way that the lower end of the upper bar 1 is left locked inside the orifice 8. As can be seen from Figure 2, the upper bar 1 has a first articulation 10 with the second lower bar 4 and a second articulation 11 with an intermediate piece 12, which piece also has in its turn an articulation 13 with the first lower bar 3. In order to unlock the bars in the position shown in Figure 2, the unlocking means shown in Figures 3 and 4 have to be acted upon. As can be seen from these figures, inside the upper bar there is a movable rod associated with the pushbutton 6 through a lever 15. Between said lever 15 and the pushbutton 6 a spring 16 is fitted for return of the pushbutton 6 to its original position when it is no longer being pressed. Pressing on the pushbutton 6 causes the rod 14 to move downwards to abut against the internal surface of the orifice 8, or in the case of a circular slot with the surface which is enclosed by said slot, and leads to movement of the movable body 7 to its lower position against the action of the spring 9. This lower position will be defined by a stop 17, on which the spring 9 rests. This position will be a suitable one to permit the lower end of the upper bar 1 to lie outside said orifice 8, thus permitting folding of the child pushchair of the invention. Once unlocking has been carried out, in order to fold the pushchair the two upper bars 1 have to be pushed forward at the same time. This simultaneous pushing of the two upper bars 1 will cause the bars to rotate in the direction of the arrows shown in Figure 6, leaving all the bars one on top of the others. Although reference has been made to a specific embodiment of the invention, it will be clear to a person skilled in the art that the foldable child pushchair described could be subject to many changes and modifications, and that all the details mentioned could be replaced by others that are technically equivalent, without departing from the scope of protection defined by the attached claims.

Claims: Foldable child pushchair, which includes a structure (1, 2, 3, 4) provided with wheels (5), means for locking the structure of the pushchair in unfolded position and manual means for unlocking the structure and allowing the pushchair to be folded, with said structure being made up of a number of articulated bars (1, 3, 4) linked to each other, two of said bars (1) defining two handles (2) at their upper ends so that the user can guide the pushchair, characterised in that said manual means of unlocking are made up of a pair of pushbuttons (6) fitted on said handles (2), which when operated unlock the articulations (10, 11, 13) of the bars (1, 3, 4) which form the structure of the pushchair. Child pushchair as claimed in Claim 1, in which said structure of the pushchair includes two side assemblies of articulated bars, with said assemblies being joined together by means of a number of similarly articulated bars (1, 3, 4), and with each of said assemblies of side bars being made up of an upper bar (1) which defines the handle (2) and by first and second lower bars (3, 4) provided with wheels (5) at their lower part, the first lower bar (3) being substantially aligned with the upper bar (1) in the unfolded position of the child pushchair, characterised in that said means for locking the structure in unfolded position include a movable body (7) fitted close to the upper end of said first lower bar (3), said movable body (7) including an orifice (8) for housing the lower end of the upper bar (1), with said movable body (7) being associated with elastic means (9) which push said movable body upwards and cause locking of the lower end of the upper bar (1) in the interior of the orifice (8) of the movable body (7). Child pushchair as claimed in Claims 1 and 2, characterised in that said means of unlocking include a movable rod (14) fitted inside said upper bar (1), said movable rod (14) being associated with the pushbutton (6) fitted onto the handle (2), in such a way that acting upon the pushbutton (6) causes the rod (14) to move, abutting in the orifice (8) of the movable body (7) and moving said movable body against the action of the elastic means (9) a sufficient distance for the lower end of the upper bar (1) to be left outside said orifice (8), thus permitting folding of the structure of the pushchair. Child pushchair as claimed in Claim 3, characterised in that said movable rod (14) is associated with said pushbutton (6) by means of a lever (15) with interposition of elastic means (16) between the lever (15) and the pushbutton (6). Child pushchair as claimed in Claim 2 or 3, characterised in that said orifice (8) is a circular slot.

Inventors: JANE STOPP JOAQUIM, JANE STOPP, JOAQUIM
Applicants: PLAY SA, PLAY, S.A.
Application year: 2000
Main classification: B62B7
IPC codes: B62B7