EP3172110A1 - Pushchair - Google Patents

Abstract

The invention relates to a pushchair (1), comprising a chassis (2) with front wheel struts (5), rear wheel struts (6), a handle (8) and lateral articulations (4) with connections for each limb (7) of the handle (8) and/or a front wheel strut (5) and/or a rear wheel strut (6), and an attachment (3) which can be secured thereto, the attachment (3) comprising a frame for the seatback (54) or for a seat pan (48) and/or for a hood (71) which is or can be secured to the chassis (2) in the region of the articulations (4), and frame parts and/or flat members for supporting the sitting surface (55) of the attachment (3), the frame parts and/or flat members of the sitting surface (55) of the attachment (3) not being connected mechanically to the frame for the seatback (54) and/or for a hood (71) but at most via the (cover) material of the attachment (3) for the seatback (54) or for a seat pan (48) and/or for a hood (71).

Description

 stroller

The invention is directed to a stroller, comprising a chassis with front struts, rear struts, a push bar and side hinges with connections for each leg of the push bar and / or a front strut and / or a rear strut, as well as an attachable thereto essay. Strollers should be universally applicable, while comfortable, functional and stable during use; In times of non-use, prams, on the other hand, should disturb as little as possible, so take up as little space as possible. Especially the last condition is probably the hardest to fulfill, because this can only be achieved by an efficient folding mechanism. However, it is not enough to provide joints at suitable places; rather, these articulated joints should be as stiff as possible in the unfolded state, so that the stroller receives sufficient stability. On top of that, the adjustment of the joint should still be as simple and comfortable as possible.

From the disadvantages of the prior art described results in the invention initiating problem to further develop a generic stroller so that it is folded as small as possible, but as stable as possible in the unfolded state. With regard to the folding of the stroller particularly bulky components of the same prove like an essay problematic.

The solution to this problem is achieved in that the article has a frame for the backrest or for a seat recess and / or for a hood, which can be fixed to the chassis in the region of the articulated joints, and frame parts and / or flat body for supporting the seat of the Aufsatzes, wherein the frame parts and / or flat body of the seat of the essay are mechanically not connected to the frame for the backrest or for the seat recess and / or for a hood, but possibly on the (reference) fabric of the essay for the backrest or for a seat recess and / or for a hood.

If the attachment extends at least partially between the articulated joints, it can make itself disturbing when folding the chassis by means of these joints. In particular, care should be taken to ensure that the chassis is easily folded up so that sufficient space is reserved for a largely rigid attachment, even when folded up. On the other hand, thereby increasing the footprint of the stroller in the folded state, which od, for example, when stowed in a trunk. Like. Unfavorable. By contrast, the attachment according to the invention is highly flexible because it not only knows one possible direction of movement, such as a joint, but allows different relative movements and, in particular, a superposition of different relative movements, depending on how the folding process requires this. So there are no other joints in addition to the two joints, in particular not in the area of the essay.

It has proven to be beneficial that an adapter is integrated or fixed or fixable on a joint, with which various attachments can be attached to the chassis of the stroller, such as baby carts, sports or buggy seats, reclining seats similar bags, etc. So that's different Towers interchangeable, which can be customized depending on the advancing age of the child's body size. The invention further provides that two lateral articulated joints are not directly connected to one another, in particular not by a straight bar or the like. Due to the absence of such a direct connection, on the one hand space is created in the area between the two joints for the construction of a possibly also somewhat larger Aifsatzes, and on the other hand, the child seat can thereby be folded apart and without any clamping apart.

The invention can be further developed such that a fixed to the chassis essay dips into the area between the two lateral joints. This can reduce the seat height for a child, whereby the center of gravity of the loaded essay is reduced and thus the risk of tipping over is considerably reduced. On the other hand, from a hinge connection arranged above the seat surface, struts can extend directly to the front and rear wheels, which include a right or even acute angle in the area of the hinge connection, resulting in a comparatively simple construction with simultaneously high stability. The seating surface of the attachment should be below the line connecting the two lateral joints. Thus, the hip of a child sitting on it comes about in a joint escape with the articulated connection used in the unfolding of the baby carriage. Thus, if necessary, by changing the position of this joint, different sitting or reclining positions could be set for the child.

On the other hand, the backrest of the attachment should be located behind the connecting line between the two lateral joints. By doing so, the child's center of gravity lies almost exactly on the line connecting the two lateral ones

Articulated joints, so pretty centered between the front and Rear wheels. This in turn has the advantage that the stroller is easier to control and navigate.

The top of the attachment can be located above and / or behind the connecting line between the two lateral joints. This design specification serves the purpose of optimally trimming the stroller.

The Austarierung of the stroller is also another requirement, after which a safety bar of the essay above and / or in front of the line connecting the two lateral joints.

By each one or more linear guides are provided for inserting a lateral connection part on an essay on the inner sides of the housing of the articulated joints, so that a releasable connection to various, assembled and removable and thus exchangeable essays is created. The invention can be further developed in that at least one linear guide has a groove-shaped cross section, preferably with lateral undercuts similar to a dovetail joint. Thus, a fixed thereto essay can only be solved in the sliding direction of the linear guide of the chassis.

If a plurality of mutually parallel linear guides are arranged side by side at each joint, the carrying capacity of such a linear guide is duplicated. The sliding direction of the linear guide should be approximately vertical and / or limited downwards. By the former design, the release is possible only in a vertical direction, the latter expression ensures that the Lift the attachment only by lifting, so that the downward gravity counteracts an accidental release.

It has been proven that the sliding direction of the linear guide with respect to a front or rear rear strut or against an angle bisector therebetween is maintained even with a relative pivoting of the joint. This has the advantage that the orientation of the attachment is given at fully unfolded chassis and can not change unintentionally.

The invention recommends that the tower-side pendants are connected to the linear guides on the two articulated joints by a bracket with a U-shaped course. Such a bracket encompasses the body of a child in a spacious way and leaves this enough space and freedom of movement.

Such a U-shaped bracket connects the tower-side counterparts and at the same time can form a framework or a frame for the essay, wherein the backrest of the essay on this set, forwardly extending side parts of the cover fabric on the U-shaped bracket be fixed or fixable can.

The backrest of the essay can be connected or connectable in the region of its upper edge with the central web of the U-shaped bracket. As a result, the backrest is relieved and can be made relatively soft, for example made of textile.

Thus, the direction of the U-shaped bracket is given. Its level should extend from the connecting line between the two joints upwards, but at the same time away from the line connecting the two joints in the direction of travel of the stroller, ie forward or backward, depending on the direction of travel of the stroller. An advantageous development provides that the seat hangs on the backrest and possibly on associated side parts. Such a loose connection prepares no problems when folding the stroller.

The two side legs of the U-shaped bracket can be transferred to other tasks. For example, the side parts of a top can be fixed to it, in particular joints that allow it to be folded together and unfolded. While the backrest is preferably fixed to the central web of a U-shaped bracket, the hood should indeed be pivotable forward over the backrest. This is supported by several U-shaped ribs whose free ends meet in their own hinge points, which in turn are located on each one of the two side legs of the U-shaped bracket.

Furthermore, a safety bar for a child can be fixed to the tower-side counterparts to the linear guides or to the two side legs of the U-shaped bracket. This can be removable to facilitate the insertion and removal of a child.

Further advantages can be achieved by fixing or fixing a plate serving as a lower leg support to the chassis, in particular to the front wheel stays and / or to the rear wheel stays. Such a plate can favor a sitting position with flat outstretched upper and lower legs, especially in small children.

If older children are to use the stroller, this lower leg support can be folded down. The then no longer disturbing plate allows a normal sitting position, the lower leg enclose an approximately right angle with the thighs. If the seat of the essay in its front region has an approximately tab-like extension which is formed as a pocket, the lower leg support can be inserted therein. This follows the relevant, lobe-like region of the seat of the respective position of the fold-away lower leg support.

By having a front strut, a rear strut and / or a leg of the push bar in a common plane, forces between them can be transmitted within a common plane, thereby improving the stability of the chassis. This is also made possible by the fact that a front or rear strut is integrated with the housing of the articulated joint or fixed thereto, while the other front or rear strut on the respective side of the chassis and a side leg of the push bar relative to the housing of the hinge connection are pivotally mounted, namely by two different pivot axes, which are preferably aligned parallel to each other, but not coaxial to each other, but eccentric to each other, so that z. B. in the folded state, a front and a rear strut can be approximately parallel to each other. The relative to the housing of the joint pivotable side legs of the handlebar can - as well as the rotatably connected to the housing chassis strut - tangent to the respective pivot axis, so that the respective spars can collide in the collapsed state without colliding next to each other. Ideally, at most one subsequent to the joint spar should extend radially to a pivot axis.

The invention is preferably characterized in that for locking a hinge connection of the chassis, in particular between the connection for the push bar on the one hand and the housing of the joint on the other hand, in the direction of the axis of rotation of the respective joint end side faces of a part frictionally connected to another inner part or to an inside portion of the joint are pressed. Finally, it is the teaching of the invention that for releasing the locking of a hinge connection of the chassis, in particular between the connection for a front or rear strut on the one hand and the housing of the joint on the other hand, a two-armed lever or rocker is provided, the / under the Influence of at least one spring element is pressed against a peripheral region of an adjustable joint part and pulls at a certain angular position a movable locking bolt in the direction of the axis of the adjustable joint part and thus releases the respective front or rear strut, so that the chassis can wringen folded.

Further features, details, advantages and effects on the basis of the invention will become apparent from the following description of a preferred embodiment of the invention and from the drawing. Hereby shows:

1 shows a stroller according to the invention in a perspective

 View, with the child sitting facing in the direction of travel;

Fig. 2 shows a detail of the stroller according to Fig. 1 when removed

 Essay, also in a perspective view; a detail about a pivot frame of the chassis of the stroller according to Figures 1 and 2 with a mounting option for an essay.

Fig. 4 is a side view of an attachment for fixing to the

Stroller chassis of Figure 3, shown partially broken away. 5 shows a preferably flexible element of an attachable to the stroller according to Figures 1 to 3 essay.

Fig. 6 another, preferably rigid, optionally adjustable

 Element of an attachable to the stroller of Figures 1 to 3 essay;

Fig. 7a, another, preferably rigid element of the one

 Stroller according to Figures 1 to 3 fixable essay in a front view.

Fig. 7b shows the rigid element of Fig. 7a in a perspective view, partially broken away; Fig. 7c, the rigid element of Figs. 7a and 7b in a perspective

 Exploded view;

Fig. 8 is a view similar to FIG. 2 on frame parts of

 Pushchair according to Figures 1 to 3, wherein the frame is set such that when completely mounted thereto attachment the child does not look in the direction of travel, but has eye contact with a person pushing the stroller person;

Fig. 9 is a side view of the fully assembled essay in the

 Position according to FIG. 8;

Fig. 10 is a hinge of the stroller frame according to FIGS. 1 to 3 or 8 and

9, with two adjoining chassis struts and a likewise striving away from it spar of the handlebar; 11 shows an exploded view of the arrangement according to FIG. 10, so that the inner workings of the joint and of the handlebar spar can be recognized; Figure 12 is a side view of the arrangement of Figure 10, partially broken away and partly in section, wherein the joint is shown in fully locked state.

FIG. 13 shows the joint from FIG. 12 in an enlarged view; FIG.

14 shows a section through the joint according to FIG. 13 along the line XIV

 XIV;

Fig. 15, the joint of FIG. 12 in one of FIG. 13 corresponding

 Representation, in unlocked but still latched state;

Fig. 16 is a representation corresponding to FIG. 14 of the joint in the

 State of FIG. 15; Fig. 17, the joint of Fig. 12 in a Figs. 13 and 15 respectively

 Representation, however, in not only unlocked but also disengaged condition;

FIG. 18 shows a representation of the joint corresponding to FIGS. 14 and 16 in the state according to FIG. 17;

FIG. 19 shows the arrangement according to FIG. 17, wherein the first latched

Push bar is pivoted into the other operating position, where it is locked again, with the sliding and thus direction of travel now reversed; FIG. 20 shows the arrangement according to FIG. 18, wherein the push bar is now also locked in the new operating position; FIG.

Fig. 21, the joint of the arrangement of FIG. 18 in an enlarged

 Representation, in completely locked condition;

FIG. 22 shows the arrangement according to FIG. 21, the push bar now being unlocked again; FIG. Fig. 23, the arrangement of FIG. 22, wherein the handlebar is pivoted after complete disengagement into a collapsed or deployed to a strut of the chassis position, on the other hand, the locking mechanism for the second, relative to the housing of the joint adjustable chassis strut is disengaged ;

FIG. 24 shows the chassis in a view corresponding to FIG. 24, but completely folded, so that the handle bar on the one hand and a chassis strut on the other hand are folded onto the other chassis strut; FIG. such as

Fig. 25 the entire stroller in accordance with Fig. 24 folded chassis, without requiring the attachment would have to be dismantled before.

The reproduced in the drawing stroller 1 is designed so that it can be unfolded and unfolded again and is particularly easy to handle both when unfolded and claimed in the folded state only very little space. Contributes to this, the special design of the chassis 2, but also the special structure of the essay. 3 The chassis 2 is symmetrical with respect to a vertical, parallel to the direction of travel center plane. Central components of the chassis 2 are two laterally arranged joints 4, which are not directly connected.

Both joints have the same structure, but are preferably mirror images of each other. There are in each case connections or connections to at least four elements: two struts each of the chassis 2, namely a front strut 5 and a rear strut 6, to the attachment 3, as well as to each side leg 7 of a push bar 8.

Preferably, each front wheel strut 5 leads to one each in a pivot joint 9 about a vertical axis and rotatably mounted in a fork-shaped receptacle 10 front wheel 11, the spokes 12 connected to the wheel hub 13 rim 14 may be provided with a tire 15, for example, hard rubber , Since hub 13 is offset by the fork-shaped receptacle 10 relative to the rotary joint 9 in the horizontal direction to the rear, there is an automatic steering of the relevant front wheel 11 controlling caster.

Preferably, the front wheel struts 5 are not interconnected or only by a about halfway up or in the lower region extending transversely to the direction strut 16 for suspending a transport basket or a flexible, trough-shaped cut transport mat 17, which is also still hooked to a second strut 18, which connects the two rear struts 6 together at about the same height.

While the front wheel struts 5 preferably extend straight straight or at best are bent down slightly to the inside to better control the stroller 1 at narrow passages, the rear struts 6 may indeed extend in a plane parallel to the direction of travel, but an arcuate curved course follow, so they are in on the other hand, the upper region of the joint 4 strive towards the rear, while in its lower region, near the rear wheels 19, they run almost vertically and thus rest on the rear wheels 19 in an approximately vertical direction.

The rear wheels 19 are preferably similar to the front wheels 11 are formed, so with a hub 20, radially extending away spokes 21 and one of these carried rim 22, whereupon a tire 23 may be provided, in particular made of hard rubber or in the form of air-filled tires , Etc.

As with the front wheels 11, it is of course also possible with the rear wheels 19 that they may be provided with pneumatic tires. In contrast to the front wheels 11, however, the rear wheels 19 are preferably not steerable. Instead, they sit on a common axis 24, on which the two rear struts 6 each supported by suspensions to increase ride comfort for a child. In addition, a parking brake may be provided, which can be locked, for example via a Bowden cable 25 from the handle 26 of the handlebar 8 and / or can be solved. Of course, for detecting and / or releasing the brake, a foot pedal od. Like. Be provided. Depending on the embodiment, the two rear wheels 19 may be mounted separately on an axle 24, in which case two braking devices are to be provided, or they are rigidly connected to a rotatably mounted axle 24, so that only a single, acting on this same axis 24 braking device needed becomes. The handle 256 of the pusher bar 8 can be connected via hinges 276, in turn, can be connected to the upper ends of the side legs 7 of the handlebar 8. The housing 28 of each joint 4 is preferably connected to the respective front wheel strut 5, so this opposite not rotatable.

The housing 28 of the joint 4 has a substantially approximately cylindrical structure with an inner, the top 3 facing end face 29 and an outer, facing away from this essay 3 end face 30; between them is a lateral surface 31. From this lateral surface 31 projects laterally an extension 32 away.

While the connection for the push bar 8 is located on the lateral surface 31 of the cylinder jacket-shaped main body section, the rear strut 6 strives away from the lateral extension 32.

The connection 33 for the attachment 3 is located on the inner end face 29. This connection has the shape of a flat disc 34, wherein at least one, preferably several, in particular two or three or four or five or six mutually parallel slots 35 are located.

The disc 34 is fixed with its rear side on the inner end face 29 of the joint housing 28 and non-rotatable and / or immovable or integrated, in such a way that the slots 35 provided with the flat sides 36 both arranged on a joint 4 discs 34th facing each other.

The orientation of the discs 34 is such that the slots 35 all extend in a vertical direction or in a predominantly vertical direction. These slots each have an upper and a lower end. While the lower ends are closed, so that the respective slot 35 ends dull, are the upper ends of the slots 35 open, so that from there web elements 36 could be inserted.

This is important because both the slots 35 and the dahinein pushable webs 36 have no rectangular cross-sections, but are undercut, for example in the manner of a dovetail joint or in which the cross-sections taper cross-sectionally stepped, so that in each case a widened web portion in the region free longitudinal side of the web 36 cooperates with a widened in the bottom of the groove-shaped slot 35 slot portion, while the tapered to its mouth slot cross-section cooperates with a tapered web cross-section near the bottom. Therefore, the webs 36 can not solve in the horizontal direction of the slots 35, but only in a vertical upward direction, overcoming the opposing, downwardly acting weight of the essay 3rd

As can be seen from Fig. 4, the webs 36 are in turn arranged on a disc 37 and thereby summarized, which carries the attachment 3.

It can also be seen that the arrangement of the slots 35 as well as the arrangement of the webs 36 insertable therein on the respective disk 34, 37 are symmetrical to a center line. This has the consequence that the attachment 3, which has a respective disk 37 on both sides, can also be suspended on the chassis 2 of the baby carriage 1 in a state rotated by 180 ° about an axis parallel to the slots 35 or webs 36. This makes it possible to mount the attachment 3 both in the direction of travel and against the direction of travel on the chassis 2. Although by gravity, an accidental release of the

Essay 3 of the chassis 2 as well as excluded. Nevertheless, the invention additionally provides a lock, which is a recess or recess 38 in one of the two discs 34, 37 and an extension 39 on the respective other disc 37, 34, which can spring back, for example by being arranged on a by lateral slots of the surrounding disc 34, 37 partially cut tongue 40 ,

If the extension 39 is engaged in the recess 38, it holds the resilient tongue 40 in this state and thus ensures that the attachment 3 can not be lifted up out of the receiving slots 35.

In order to be able to detach the attachment 3 from the chassis 2 again, at the free end of the tongue 40, a tab 41 projecting beyond the edge of the relevant slice 34, 37 is provided, for example, an anvil. This protruding tab 41 is accessible from the outside even with adjacent discs 34, 37 and can be bent away from the other disc until the 40 on the extension 39 of the tongue of the recess 38 is released and thus the attachment 3 can be removed upwards , Of course, the arrangement of the slots 35 and webs 36 may also be reversed, that is, the chassis-side discs 34 then have webs which engage in slots on the attachment-side discs 37.

The illustration according to FIG. 4 can also be seen that the attachment-side disks 37 have the same peripheral shape as the chassis-side disks 34.

The attachment-side disks 37 and / or the chassis-side disks 34 preferably have a circular base surface, ie a circular or cylindrical outer surface 42. At least one supporting element of the attachment 3 is fastened to the attachment-side disks 37, in particular to their lateral surfaces 42, in particular a bracket 43 with a U-shaped course, so with two parallel to each other Side legs 44 which are connected by an end-side web 45 at their ends facing away from the discs 37 together. The bracket 43 is shown in detail in Figs. 7a to 7c. It can be seen that the side legs 44 of the bracket 43 radially strive away from the lateral surfaces 42 of the discs 37.

On the other hand, the side legs 44 of the bracket 43 in use do not extend parallel to the webs 36 or slots 35 of the attachment-side disk 37, but at an angle in the order of about 45 °. As a result, the bracket 43 protrudes in the inserted and locked or locked state at a similar angle of about 45 ° upwards - either in or against the direction of travel, depending on the orientation with which the attachment 3 was attached to the chassis 2.

Furthermore, with the serving as an adapter discs 37 of the attachment 3 continue to be connected to the child on getting up preventing pelvic strap 46. Preferably, such a pelvic strap 46 is removable. It can also have a U-shaped course, so that its leg ends can be inserted into sleeves 47 each connected to an adapter disk 37.

Preferably, the pelvic strap 46 does not extend in use in the same plane as the support bracket 43 for the attachment 3. Rather, those two brackets 43, 46 include an intermediate angle of about 60 ° to 150 ° with each other; in the example shown, this angle is about 100 °. In this case, the direction of the slots 35 or webs 35 lies on the respective disk 37 between these two ironing levels, preferably approximately centrally therebetween, as shown in FIG. 4.

4, the position of use of the two brackets 43, 47 is reproduced. Since this position of use, however, for some Situations, for example, for the transport of the stroller od in a trunk. Like. Proves to be relatively bulky, the invention provides that both brackets 43, 37 are independent of each other with respect to the discs 37 are rotationally adjustable. In particular, one or preferably both brackets 43, 37 are pivotable from the position of use in both directions of rotation, so that a space-saving constellation of the two brackets 43, 47 can be taken approximately in the direction of the push bar 8, regardless of the position of the push bar 8. Those performing locking mechanisms 116 are located respectively in the tower-side discs 37 and are clearly visible in Figs. 7b and 7c; in Fig. 7b also the support bracket 43 is shown cut lengthwise, so that you can see its inner life. The locking mechanisms 1 6 are jointly controlled by an actuating element 117 in the region of the web or vertex 118 between the two side legs 44 of the support bracket 43. The actuating element 117 comprises a support bracket 43 enclosing sleeve 119, preferably with a radially projecting tab 120. The sleeve 119th is guided in the longitudinal direction of the support bracket 43 in a trough-like recessed portion 121 and therefore can only be pivoted about the support bracket 43 around.

On its inner side 122, the sleeve 119, which is divided for the purpose of assembly in two half-shells 123, which are closed around the support bracket 43 around, two helical depressions 124, which, however, are oriented differently. The two recesses 124 each consist of two sections, one of which is arranged on the upper half-shell 123, the other on the lower half-shell 123. The depressions in the same half-shell follow different courses - one is right-handed, the other left-hand. In this case, the two half shells 123 are preferably identical to one another on their inner sides 122. Overall, there are a total of 4 the mounting bracket 43 to 180 ° surrounding screw flights 124, two each on the upper half shell 123 and two on the lower half shell 123.

In each of these two helical depressions 124 engages a pin 125, which passes through the support bracket 43 transversely to the local longitudinal direction and in a local slot 126 in just this local longitudinal direction - that is transversely to the sitting direction - is displaced. The pins 125 each protrude with their two ends out of the slot 126, and each end engages in each one of the four screw threads 124 of the sleeve 119 a. The result is that upon pivoting of the sleeve 119 by about 180 ° by means of screw threads 124, the two pins 125 are moved in their slots 126, respectively in opposite directions, either either towards or away from each other. At each of the two pins 125 a pull wire or other traction means 126 is attached, for example, with a loop or eyelet 127 at one end of the traction means 126. The two traction means 126 extend within the hollow support bracket 43 away from the actuator 117 by each a side leg 44 of the support bracket 43 to its free, open end 128 in the region of a disk element 37th

The free, open ends 128 of the side legs 44 of the support bracket 43 serve as linear guides for each one therein received and slidable in the longitudinal direction control 129. This is provided with a transverse bore 130, wherein a arranged at the free end of the traction means 126, for example, cylindrical thickening element 131 engages to transmit a force exerted by the actuating element 117 on the traction means 126 tensile force on the control element 129 and thereby pull that in the respective open end 128 of a side leg 44 of the support bracket 43 into it. The reverse movement produces spring elements 132 which are coupled to the control element 129 and are biased in this way, that they endeavor to extract that from the opening 128, as soon as a decreasing tensile force on the part of the actuating element 117 permits.

The control element 129 is further penetrated by at least one transverse pin 133, which serves the actual rotation lock.

The disk elements 37 each consist of a kind of housing 134 which serves to connect to the disk 34, for example via the slots 35 therein, in which webs 36 can engage the housing 134.

The housing 134 comprises two plates 136 interconnected by a web 135, between which a disk-shaped element 137 is rotatably received about a rotation axis 138, the plates 136 of the housing 134 being penetrated perpendicularly by the axis of rotation 138.

The control element 129 protrudes in each sliding position partially into a kind of channel within the disc-shaped element 137 and thereby divides that its pivotal position about the axis of rotation 138 with. In this case, the transverse pin 133 protrudes from the disk-shaped element 137 at least on its side facing away from the frame-side adapter 34 side. In the relevant disc 136, an arcuate recess 139 is incorporated, which is penetrated by the transverse pin 133. In the edge of this arcuate recess 139 is at least one Einrasterweiterung 140, in which the transverse pin 133 can slide at the desired use pivoting position, under the influence of the spring elements 132nd

Further, for the connection of the game bracket 47 to the disc member 37 there is another, annular member 141 is provided, which extends on the outside of the inner disc 135 - parallel to that -. This is also rotatably supported on the axis of rotation 139 and has on its inside a rim-like circumferential, to the disc 139 projecting edge 42, in turn, at its radially inner Side at one point has an outwardly directed, trough-shaped recess 143 as Einrasterweiterung.

Since the inner edge 142 has a larger radius than the radially outer edge of the arcuate recess 139 in the disc 136, when releasing the transverse pin 133 from the latching recesses 139, 143 first the handle bar 47 is released, only then the support bracket 43. Conversely first, the support bracket 43 engages, then the play bar 47. On the two side legs 44 of the support bracket 43 as well as at the web 45, the actual seat recess 48 of the attachment 3 is attached.

The seat recess 48 is shown in Fig. 5 and consists mainly of a flexible material, so adapts to the shape and posture of each child optimally. It is defined in its upper region 49 on the web 45 and in the region of its two side edges 50 on each of the two side legs 44 of the support bracket 43, for example by having lobe-like areas or extensions, which around the respective bar 44, 45 of the support bracket 43rd are looped around and then connected to themselves, for example by means of snaps 51.

As can further be seen from FIG. 5, the seat recess 48 is subdivided into a central middle region 52 and into two adjoining edge regions 53.

The central area 52 is subdivided into an upper area, which serves the child as a backrest 54, and into a lower area, which is intended as a seat surface 55. Preferably, the seat surface 55 is smaller than the seat back 54, although both have approximately the same width.

At the height of the transition region 56 between the seat surface 55 and the backrest 54 may each zwickeiförmig themselves in the edge regions 53 outwardly flared areas be recessed, so that after sewing together the edges of the cut-out area more or less automatically the shape of a seat recess 48 results. The edge regions 53 act as armrests or side supports 57.

Belts 58 may also be provided for restraining a child in the central region 52; For example, shoulder straps 59 can emerge forward at slots 60 in the backrest 54 and be connected via a buckle 61 with pelvic straps 62 or a lower strap 63 running centrally through the crotch.

So that the child does not sit in the seat recess as in a hammock, a flat seat support 64 is provided below the seat 55 of a solid material. This is preferably fixed to the respective front in the viewing direction of the child chassis struts 5, 6, for example by od laterally projecting extensions 65 in the chassis struts 5, 6 fixed sleeves od. Like. Plugged or used.

The seat recess 48 lies with its seat 55 only loosely on the plate-shaped seat surface support 64. In particular, the seat support 64 is not connected to the support bracket 43.

In front of the front edge 66 of the seat 55 hangs a lower leg flap 67, preferably also made of a flexible material. This can have on its underside two side pockets 68 which extend along the side edges of the lower leg strap 67 and are open at the rear, ie in the region of the front edge 66.

These pockets 68 are used to accommodate a lower leg support 69th Each such lower leg support 69 is in the form of a short rod or stub, which is connected in its rear region via a local joint 70 with the fixed seat support 64. As soon as the lower leg supports 69 are inserted into the pockets 68 of the lower leg flap 67, they determine their shape: If the lower leg supports 69 are oriented approximately horizontally in the direction of view, as can be seen in FIG. 4, the lower leg flap 67 stretches between them like a horizontal one Sail up and serve a small child to deposit his lower legs.

For larger children, the lower leg supports 69 are bent approximately vertically downwards at their joints 70 and take the lower leg flap 67 with them. Now, a taller child can sit on the top 3 and place the lower legs down in the usual sitting position.

Another special feature of the article 3 is a hood 71. This also consists of a flexible material, which is clamped on a plurality of rib-shaped over the seat cover top 72.

The top stirrups 72 each follow a U-shaped course. The ends of their side legs meet on each side of the stroller 1 to a respective joint, which can be fixed to prepared mounting portions 73 of the side legs 44 of the support bracket 43.

Since the most components of the article are thus connected via the support bracket 43 with the adapter disk 37, they can be removed as a whole if necessary and plugged in the opposite direction again. In addition, only the fixed seat support 64, which is preferably integrated with the lower leg supports 69 to a structural unit, dismantled and be attached to the respective front in the direction of the chassis struts 5, 6 again.

However, the child must temporarily get up or be removed from the seat, since the conversion could otherwise be a bit exhausting. If a mother only wants to switch the direction of her child's eyes at short notice, for example because she cries violently without eye contact with the mother, then the stroller according to the invention also offers the possibility of pivoting the push bar 8 into a different position instead of the attachment 3, so that the viewing direction of the person does not swing Child, but the sliding direction of the mother is reversed.

This is achieved by the joint 4 according to the invention. This is shown more clearly in FIGS. 10 et seq. In particular, from Fig. 11 can be seen its internal structure.

In the illustrated embodiment, the housing 28 of a joint 4 is fixed to a strut of the chassis 2, in the drawing on a front strut. 5

On the housing 28 can be seen a socket-like connection for the front wheel strut 5. With this connection, the housing 28 of the joint can be integrated, for example, produced in a single operation injection molding technology.

The housing 28 comprises a part of the lateral surface 31 and two end faces 29, 30. In addition, an extension 32 is formed on the lateral surface 31 for the articulation of the rear wheel strut 6. Furthermore, it can thus be integrated with a securing eye 74, whereby the stroller od, for example, in a train. Like. By means of a belt can be anchored. As can be seen further, rib-shaped elevations 75 are integrally formed on the inner sides of the two end faces 29, 30.

Pendants in the form of groove-shaped recesses 76 are located on the outer sides 77 of two inner hinge plates 78, which are anchored from the inside to the housing end plates 29, 30 such that the ribs 75 engage in the grooves 76 and thereby relative rotation is excluded , Of course, the position of the ribs 75 and grooves 76 may also be reversed.

As can be seen further, a window-like recess 79 is provided in each hinge plate 78. The window-like recesses 79 of both hinge plates 78 are congruent. In general, the joint plates 78 are mirror-inverted to a median plane of the articulation 4 vertically penetrated by the axis of rotation 80 of the articulation 4.

The two hinge plates 78 are spaced apart and take between them another, disc-shaped part 81, which has a connection 82 for a side leg 7 of the handlebar 8, for example, with an extension 83, the mating with the push bar 8 in the open end a hollow profile-shaped side leg 7 engages. By a transverse pin or a cross through the extension 83 and the side legs 7 cross-bolt 84, these parts are connected together.

The disk-shaped part 81 also has a window 85 extending between its two base surfaces, which also communicates with a cavity in the extension 83. In the window 85, a locking body 86 is slidably guided. The locking body 86 is integrated or connected at its end 83 facing the end with a linkage 87 which extends upwardly within the hollow side leg 7 of the pusher bar 8 and coupled via one or more connection joints 88, 89 and lever 90 with an actuating lever 91 is.

The actuating lever 91 is in turn pivotally mounted on a pivot axis 92 extending transversely to the direction of travel. In the present case, this is a one-armed lever, wherein both the actuating handle 93 and the first connecting joint 89 are arranged to a connecting lever 90 on the same side of the pivot axis 92. Accordingly, if the operating handle 93 is pivoted upwardly toward the handle 26 of the handlebar 8, as shown for example in FIG. 12, the linkage 87 and thus also the locking body 86 move in the direction of the handle 26 of the handlebar 8, So up. If, however, the operating handle 93 is pivoted downwards, as can be seen in FIGS. 15 or 17, then the linkage 87 and thus also the locking body 86 moves towards the joint 4, ie downwards.

A coupled to the linkage 87 spring 94, in particular a surrounding surrounding coil spring, on the other hand, is supported on the spar of the side leg 7 of the handlebar 8 and is anxious due to a bias, the linkage 87 together with the locking lever 86 to push up, provided the operating handle 93 allows this.

The window 85 in the disc-shaped part 81 has a predominant longitudinal extent in the direction of the side leg 7 of the handlebar 8 and thus allows the locking body 86 under the influence of the spring 94 and the actuating handle 93 to move within the window 85 in the longitudinal direction of the linkage 87 , A rotation about the axis of rotation 80 of the joint 4 is not or hardly possible. The situation is different with the windows 79 in the two hinge plates 78. These have predominantly an arcuate shape or a circular arc-shaped to the axis of rotation 80 of the joint 4 concentric course. Therein laterally projecting portions 95 of the locking body 86 place, while the body 96 is predominantly or exclusively within the window 85. This window 85 therefore assumes a guiding function for the locking body 86 in the context of the central disc-shaped joint part 81.

In contrast, the windows 79 in the two joint plates 78 determine whether the locking body 86 can be displaced together with the disc-shaped joint part 81 in the circumferential direction of the arcuate window 79.

Because the arcuate windows 79 have in addition to purely arcuate edge portions also have one or preferably two radial extensions 97, which extend at different angles from the arcuate window portion 98 to the outside.

If the laterally projecting regions 95 of the locking body 86 are located within such a radial extension 97, an adjustment of the locking body 86 and thus the disk-shaped joint part 82 and the entire push bar 8 in the circumferential direction about the rotation axis 80 is not possible. On the other hand, if the laterally projecting regions 95 of the locking body 86 do not engage in any radial extensions 97 but are in the arcuate window region 98, movement within this window region 98 and thus pivoting of the handlebar 8 is possible. The lateral extensions 95 are moved together with the locking body 86 itself by the spring 94 upwards, if they are exactly opposite a radial extension 97 of the window 79. This is an automatic latching function, which indicates to an operator that now you right position of the handlebar 8 is found.

However, the spring 94 does not have enough force to rigidly lock the hinge 4 in this position. For this purpose, rather, it is necessary that now the operator manually pulls the actuating lever 91 all the way up. As a result, the locking body 86 is pulled completely upwards or, with respect to the axis of rotation 80, completely radially outward within the scope of its specimen space within the windows 79, 85.

In this case, the laterally projecting areas 95 of the locking body 86 are completely moved into the relevant radial extension 97 of the window 79 into it.

So that in this case not by manufacturing tolerances of the linkage 86, 87, 90 relative to the spar 7, the projecting portions 95 of the locking body 86 are moved too far in these extensions 97 of the window 79, whereby the lateral joint straps 78 could be damaged or destroyed, at least one Rod 87 of the rod 86, 87, 90 is not a flat shape, but follows a slightly curved arc-shaped course, as shown in Fig. 11. This gives the linkage 86, 87, 90 in its longitudinal direction a kind of suspension possibility, which allows the foremost or lowest part 86 can remain together with its laterally projecting portions 95 in the desired locked state, even if the actuating lever 93 is not yet its final position has reached. The difference in length catches the curved and resiliently flexible rod 87 of the rod 86, 87, 90, in that it bends straight if necessary and thus becomes longer. Although this increases between the projecting portions 95 of the Verrielungskörpers 86 and the extensions 97 of the window 79 in the lateral disks 78 acting clamping force, but in an only moderate extent, namely the spring force of the elastically bent rod 87. This moderate increase in force can endure the mechanics without damage or even destruction. The arcuate rod 87 may be bent inwardly or outwardly, similar to a "(" or as ")", or even, preferably similar to an "S", may have a preferably approximately central inflection point, with two subsequent deflections in opposite directions. As shown in FIGS. 14, 16 and 18, "the radially projecting portions 95 find themselves gradually narrowing slot cross-sections and therefore finally reach abutment with inclined contact surfaces 99 at the edge of an extension 97 of a window 79 in the region of the free end of the radial Extension 97. As a result of manual, strong tightening, the two joint plates 78 are thereby frictionally and thus maximally drawn on counterparts 100 to the contact surfaces 99 in the region of the laterally projecting regions 95. The joint is latched and locked, as in FIGS This state not least remains deshlab maintained because now the operating handle 93 is pivoted completely upwards, so that now the uppermost connecting joint 89 and the

Swivel axis 92 of the actuating lever 91 approximately in the longitudinal direction of the linkage 87 lie one behind the other. As a result, the actuating lever 91 is blocked against any tensile or compressive force within the linkage 87.

It can now be seen in FIGS. 15 and 16 that, after unlocking, the contact surfaces 99 and 100 are released from each other, but under the influence of the spring 94 - at about 90 ° relative to the locking position swung down actuating handle 93 - still the laterally projecting areas 95 of the locking body 86, the radial

Extensions 97 of the window 79 engage and thus a pivoting of the handlebar 8 is still not possible. Because in this state the the Connecting line between the uppermost joint joint 89 and the pivot axis 92 of the actuating lever 91 is oriented approximately transversely to the longitudinal direction of the linkage 87, the actuating lever 91 of each tensile or compressive stress within the linkage 87 and thus leaves the spring 94, the control of the locking body 86th

If, as shown in FIGS. 17 and 18, the operating handle 93 is depressed manually, the spring 94 is overcome and the linkage 87 pushes the locking body 86 further into the joint 4 until the laterally projecting portions 95 of FIG Lock body 86 are completely pushed out of the respective radial extension 97.

Now, the locking body 86 together with its laterally projecting portions 95 within the arcuate window portion 98 is free to move and the handlebar 8 can be pivoted from the position of FIG. 17, for example, in the position of FIG. 19, where in turn a snap to another radial extension 97 is possible.

If this position of the handlebar 8 is locked by the actuating handle 93 is pulled all the way up, as can be seen in Fig. 20 and 21, the stroller 1 can now be pushed in the reverse direction.

On the other hand, if the stroller 1 is to be collapsed, the push bar 8 is first unlocked again, as can be seen in FIG. 22, and finally manually from the respective radial window extension

97 is disengaged to be seen by a further manual pivoting down of the operating handle 93 similar to FIG. 17.

Are thereby the laterally projecting portions 95 of the locking body 86 is completely pushed out of the radial extensions 97, the push bar 8 can be further pivoted until it finally close parallel to the adjacent strut 5, 6 of the chassis 2, preferably to the respective front wheel strut 5.

If you want to completely fold the stroller 1, now is the rear strut 6 zoom to the front strut 5 zoom. For this purpose, however, the rear wheel strut 6 must first be unlocked. This performs a largely automatic control, whose operation is shown in FIGS. 21 to 24: The relative to the housing 28 of the joint 4 pivotable strut 5, 6, preferably the rear strut 6, is arranged on an eccentric to the first axis of rotation 80, second Rotary axis 101 pivotally mounted. This second axis of rotation 101 is located within the projection 32 protruding laterally from the lateral surface 31 of the joint 3. Depending on the embodiment, the respective step 5, 6 may be located between outer plates of the extension 32 or within a fork of the extension 32 provided on the housing side.

The engagement and disengagement of the relevant strut 5, 6 is controlled by a second locking body 102, which is located within the housing extension 32.

The second locking body 102 has a slot 103, which is penetrated by the second axis of rotation 101. Thus, the locking body 102 is guided limited movement. Within this elongated hole 103, a second spring 104 is arranged, which is designed as a compression spring and / or as a spiral spring. This second spring 104 is supported on the one hand on the second axis of rotation 101, on the other hand at the distal end of the slot 103. Since the second spring 104 is seen from the first axis of rotation 80 beyond the second axis of rotation 101, it is anxious to the second Locking body 102 from the first Rotate axis 80 away, towards the respective strut 5, 6 of the chassis. 2

At the peripheral, the first axis of rotation 80 facing away from end face 105, the second Verrellelungskörper 102 has a projection 106 which is able to dive into a rear recess 107 of the pivotable strut 5, 6 and thereby lock them.

The second spring 104 normally pushes the locking body 102 against the back of the pivotable strut 5, 6, so that the projection 106 remains in the recess 107 and the latched state is maintained.

The unlocking movement is derived from the movement of the folding of the pusher bar 8. This purpose, a rocker-shaped, two-armed lever 108 which is mounted within the housing 28 of the joint 4, and that about a parallel to the first and / or second rotation axis 80, 101 pivot axis 109. This pivot axis passes through the housing 28 of the joint transversely and that approximately in the area where the extension 32 branches off from the lateral surface 31 of the housing 28 of the joint 4.

One end of this two-armed lever 108 is designed as a cam 110 with a partially convexly curved surface 1 1 1. In this case, the convexly curved surface region faces the first axis of rotation 80, and this region 111 finds on the circumference of the central, disk-shaped part 81 a contact surface 1 12 with a variable distance from the first axis of rotation 80th

The other end of the two-armed lever 108 engages in a recess in the rear end of the second locking body and is penetrated by a slot 1 13, which also at least partially immersed in this recess. This depression is traversed transversely by a pin 1 14, and This pin 114 also passes through the slot 1 3 of the two-armed lever 108th

The rocker-shaped lever is dimensioned such that, when the handlebar 8 is unfolded, it finds a region of the contact surface 112 which recedes in the radial direction and can therefore pivot radially inwards under the influence of the second spring 104 with its cam 1 10, thereby radially locking the second locking body 102 is pushed to the outside or down, with its Vorspurng 106 in the rear recess 107 of the respective strut 5, 6 into it. This strut is and remains engaged.

Now, if the handlebar 8 is pivoted all the way down, as seen in Fig. 23, so the cam 110 meets gradually on a radially further projecting part of the contact surface 1 12, whereby the cam arm of the rocker-shaped lever 108 is pivoted radially outward. In this case, the other arm is simultaneously pivoted radially inward, ie towards the first axis of rotation 80 and away from the second axis of rotation 101. As a result, this lever pulls the pin 114, which engages in its elongated hole 113, and thus the entire second locking body 102 back from the respective, pivotable strut 5, 6 - the projection 106 leaves the recess 107 and the pivotable strut 5, 6 can contact the strut 5 fixed to the housing , 6 are pivoted. The final result, namely the fully folded state, can be seen in FIGS. 24 and 25. Thus, the Ausklappvorgang also runs as automatically as possible, the collapsing direction of the respective pivotable strut 5, 6 facing edge 1 15 is tapered on the projection, so deviates with increasing Einklapprichtung radially to the second axis of rotation 101 out back. If the pivotable strut 5, 6 unfolded again, so this beveled edge portion 115 strips along the back of the deploying strut 5, 6 and presses the second locking body 02 as far as necessary inward until the projection 106 completely of the recess 108 opposite and finally can snap into this 103 due to the force of the second spring.

LIST OF REFERENCE NUMBERS

Stroller 26 handle

 Chassis 27 joint

 Top 28 Housing

 Joint 29 inner end face

Front strut 30 outer end

Rear strut 31 lateral surface

Side leg 32 extension

 Push handle 33 connection

Swivel 34 Disc fork-shaped receptacle 35 slot

 Front wheel 36 bridge

 Spoke 37 disc

 Wheel hub 38 recess

Rim 39 extension

 Tires 40 tongue

 Stroll 41 tab

 Transport mat 42 lateral surface

Strut 43 mounting bracket

Rear wheel 44 side legs

Wheel hub 45 bridge

 Spoke 46 pelvic straps

Rim 47 sleeve

 Tires 48 seat trough

Axis 49 upper range

Bowden cable 50 side edge Push button 76 groove-shaped recess middle area 77 outside

Edge area 78 hinge plate

Backrest 79 window

Seat 80 rotation axis

Transition area 81 disc-shaped part side support 82 connection

Strap 83 extension

Shoulder strap 84 screw

Slot 85 window

Buckle 86 Locking body lap belt 87 Linkage

Lower flange 88 Connecting joint Seat support 89 Connecting joint Extension 90 Connecting lever Front edge 91 Operating lever Lower leg flap 92 Swivel axle

Bag 93 Operating handle Lower leg support 94 Spring

Joint 95 area

Hood 96 carcass

Soft top 97 extension

Mounting area 98 Arcuate area Retaining eye 99 Contact surface Rib-shaped elevation 100 Pendant surface second axis of rotation 126 traction means second locking body 127 eyelet

Slot 128 opening

second spring 129 control

Front side 130 Cross hole

Projection 131 thickening element recess 132 spring element

two-armed lever 133 cross pin

Swivel axis 134 Housing

Cam 135 bridge

convex surface 136 plate

Contact surface 137 disc-shaped element slot 138 axis of rotation

Pin 139 arcuate recess bevelled edge 140 snap-in extension

Locking mechanism 141 annular element actuating element 142 edge

Vertex 143 trough-shaped depression sleeve

flap

recessed area

inside

half shell

deepening

pen

Claims

 claims Stroller (1), comprising a chassis (2) with front struts (5), rear struts (6), a push bar (8) and side hinges (4) with connections for one leg (7) of the push bar (8) and / or a front wheel strut (5) and / or a rear wheel strut (6) and a thereto attachable attachment (3), characterized in that the attachment (3) has a frame for the backrest (54) or for a seat recess (48) and / or for a hood (71) which is fixed or fixable on the chassis (2) in the region of the articulated connections (4), and frame parts and / or flat bodies for supporting the seat surface (55) of the attachment (3), wherein the frame parts and / or flat body of the seat (55) of the attachment (3) are not mechanically connected to the frame for the backrest (54) and / or for a hood (71), but at most on the (reference) fabric of the attachment (3) for the backrest (54) or for a seat recess (48) and / or for a hood (71). Stroller (1) according to claim 1, characterized in that at an articulation (4) an adapter is integrated or fixed or fixable, with which various attachments (3) on the chassis (2) of the stroller (1) can be grown, for example Baby bowls, sports or buggy seats, reclining seats similar to carry cases, etc. Stroller (1) according to claim 1 or 2, characterized in that two lateral articulated joints (4) are not directly connected to each other. 4. stroller (1) according to one of claims 1 to 3, characterized in that a on the chassis (2) fixed attachment (3) in the area between the two lateral articulated joints (4) is immersed. 5. stroller (1) according to any one of the preceding claims, characterized in that the seat surface (55) of the attachment (3) below the connecting line between the two lateral articulated joints (4). 6. stroller (1) according to any one of the preceding claims, characterized in that the backrest (54) of the attachment (3) behind the connecting line between the two lateral articulated joints (4). 7. stroller (1) according to any one of the preceding claims, characterized in that the hood (71) of the attachment (3) above and / or behind the connecting line between the two lateral articulated joints (4). 8. Stroller (1) according to one of the preceding claims, characterized in that there is a safety bar (46) of the attachment (3) above and / or in front of the connecting line between the two lateral articulated joints (4). 9. stroller (1) according to one of the preceding claims, characterized in that at one of the center of the stroller (1) facing the end face (29) on the housing (28) of a hinge connection (4) one or more linear guides for inserting a lateral connecting part an attachment (3) are provided, for example. In the form of slots (35). 10. Stroller (1) according to one of the preceding claims, characterized in that at least one linear guide has a groove-shaped cross-section, preferably with lateral undercuts similar to a dovetail joint. 1 1. Stroller (1) according to one of the preceding claims, characterized in that at each articulated connection (4) a plurality of mutually parallel linear guides are arranged side by side. 12. stroller (1) according to any one of the preceding claims, characterized in that the sliding direction of the linear guide (s) is approximately vertical and / or limited to the bottom. 13. stroller (1) according to any one of the preceding claims, characterized in that the sliding direction of the linear guide (s) relative to a front strut (5) or against a rear strut (6) or against an angle bisector therebetween even with a relative pivoting of the articulated connection ( 4) is preserved. 14. Stroller (1) according to one of the preceding claims, characterized in that the attachment-side counterparts (37) are connected to the linear guides on the two articulated connections (4) by a bracket (43) with a U-shaped course. 15. stroller (1) according to claim 14, characterized in that the backrest (54) of the attachment (3) set on this set, forwardly extending side parts (57) of the cover fabric on the U-shaped bracket (43) or is determinable. 16. Stroller (1) according to one of the preceding claims, characterized in that the backrest (54) of the attachment (3) in Area of its upper edge (49) with the central web (45) of the U-shaped bracket (43) is connected or connectable. 17. stroller (1) according to any one of the preceding claims, characterized in that on the backrest (54) and at the Side parts (57) the seat (55) hangs. Stroller (1) according to any one of the preceding claims, characterized in that on the two side limbs (44) of the U-shaped bracket (43) side parts of a hood (71) are fixed, in particular those of its Zusammen- and unfolding enabling joints. Stroller (1) according to one of the preceding claims, characterized in that fixed to the attachment-side counterparts (37) to the linear guides or on the two side legs (44) of the U-shaped bracket (43) a safety bar (46) for a child or is determinable. Stroller (1) according to one of the preceding claims, characterized in that on the chassis (2), in particular on the front wheel struts (5) and / or on the rear wheel struts (6), as the seat surface (55) carrying plate as Sitzflächenstütze ( 44) is fixed or definable. Stroller (1) according to one of the preceding claims, characterized in that the seat surface (55) of the attachment (3) has in its front region an approximately lobe-like extension (65) for supporting the lower legs. Stroller (1) according to claim 21, characterized in that the flap-like extension (65) formed as a pocket or with a Bag (68) is provided, wherein at least one of these supporting lower leg support (69) can be inserted. 23. stroller (1) according to claim 22, characterized in that on the chassis (2), in particular on the front struts (5) and / or on the rear struts (6), at least one serving as a lower leg support (69) extension defined or fixed is. 24. stroller (1) according to any one of claims 22 or 23, characterized in that the lower leg support (69) is folded down. 25. stroller (1) according to any one of the preceding claims, characterized in that a front strut (5), a rear strut (6) and / or a leg (7) of the push bar (8) lie in a common plane. 26. stroller (1) according to any one of the preceding claims, characterized in that for locking a hinge connection (4) whose end faces are frictionally pressed against an inner part of the joint (4). 27 stroller (1) according to one of the preceding claims, characterized in that for releasing the locking of a hinge connection (4) is provided a rocker which operates against at least one spring element.