FR2839935A1

FR2839935A1 - Child's pushchair comprises foldable chassis carrying hammock and two rear wheels and front steering assembly suspended at end of fork

Info

Publication number: FR2839935A1
Application number: FR0206265A
Authority: FR
Inventors: Damiano Marella; Vincent Truong
Original assignee: Ampafrance SA
Current assignee: Dorel France SAS
Priority date: 2002-05-21
Filing date: 2002-05-21
Publication date: 2003-11-28
Anticipated expiration: 2022-05-21
Also published as: AU2003249413A1; WO2003097426A1; EP1551685A1; CA2486861A1; FR2839935B1

Abstract

The pushchair comprises a foldable chassis (11) carrying a hammock (12) and having two rear wheels (13) mounted on a spindle (14). There is a front steering assembly (16) suspended at the end of a fork (15). The steering assembly comprises a fixed part solidly connected to the pushchair frame and a movable part which can rotate relative to the fixed part along a first vertical rotational axis. Rotation of the movable part can be locked to secure it with the fixed part in a central position in which the wheel is parallel to the pushchair rolling axis.

Description

\\HIRS CH6\BREVETS\Brevets\19500\ 1951 8FR-02MR A0 1 57.doc- 21/05102- 1\\ HIRS CH6 \ PATENTS \ Patents \ 19500 \ 1951 8FR-02MR A0 1 57.doc- 21 / 05102- 1

t:05 - 6/7 - -t: 05 - 6/7 - -

Poussette pour enfant, a train avant suspendu et directionnel. Stroller for children, with front suspension suspended and directional.

Le domaine de ['invention est celui de la puericulture, et plus precisement des voitures d'enfant (appelees par la suite << poussettes >>, ce terme englobant ici tous les dispositifs de puericulture munis de roues et permettant le transport d'un ou plusieurs enfants). Plus precisement encore, ['invention concerne la mise en The field of the invention is that of childcare, and more precisely of baby cars (hereinafter called "strollers", this term encompassing here all childcare devices provided with wheels and allowing the transport of a or more children). Even more precisely, the invention relates to the implementation

ceuvre de moyens de roulage efficaces sur des poussettes. works of efficient rolling means on strollers.

Les poussettes ont, le plus souvent, quatre roues, ou blocs de roues, montes respectivement a l'extremite de pietements du chassis de la poussette, ou aux extremites d'un axe transversal monte libre en rotation sur le chassis, en fonction The strollers have, most often, four wheels, or blocks of wheels, mounted respectively at the end of legs of the stroller chassis, or at the ends of a transverse axis freely mounted in rotation on the chassis, depending

notamment du mode de pliage retenu.in particular the folding method used.

Pour ameliorer le confort d'utilisation, on a propose des roues avant montees libres en rotation sur un axe vertical, de fa,con qutelles soient pivotantes et facilitent ainsi les changements de direction. Dans la pratique, ces mecanismes ne vent pas toujours efficaces, et on prevoit des moyens de verrouillage de chaque roue en position fixe. La mise en acuvre de ces moyens est peu aisee, paisqu'il faut se baisser devant chaque roue avant, et que ces derrieres vent generalement sales. En consequence, les utilisateurs laissent les roues en permanence en position fixe (ou en position libre), et ne profitent pas des avantages offerts par le To improve the comfort of use, we have proposed front wheels mounted free to rotate on a vertical axis, so that they are swiveling and thus facilitate changes of direction. In practice, these mechanisms are not always effective, and means are provided for locking each wheel in a fixed position. The implementation of these means is not easy, it is necessary to bend down in front of each front wheel, and that these rear wind generally dirty. As a result, users leave the wheels permanently in a fixed position (or in a free position), and do not take advantage of the advantages offered by the

choix entre les deux positions, selon les terrains. choice between the two positions, depending on the terrain.

On notera par ailleurs que la position libre, si elle est agreable sur un terrain regulier, pose des problemes des que l'on veut monter une marche ou un trottoir, ou faire une marche arriere. Wiles ont alors tendance a se mettre de travers Note also that the free position, if it is pleasant on regular terrain, poses problems as soon as you want to climb a step or a sidewalk, or make a reverse step. Wiles tend to go awry

et a bloquer la progression de la poussette. and block the progress of the stroller.

On a egalement developpe des poussettes a trots roues, presentant une roue avant unique, montee en position centrale, sur une fourche du chassis. Dans ce cas, il n'est pas possible de monter la roue avant libre en pivotement, pour des raisons evidentes d'efficacite et de securite. Les poussettes a trots roues ont done We have also developed three-wheeled strollers, presenting a single front wheel, mounted in the central position, on a fork of the chassis. In this case, it is not possible to mount the free front wheel for pivoting, for obvious reasons of efficiency and safety. Trots with wheel trots have therefore

systematiquement une roue avant non directionnelle. systematically a non-directional front wheel.

3G L'invention a notamment pour objectif de pallier ces i-nConV=rlien.S 6!e 3G The invention aims in particular to overcome these i-nConV = rlien.S 6! E

l'etat de la technique.the state of the art.

Plus precisement, un objectif de ['invention est de fournir une poussette More precisely, an objective of the invention is to provide a stroller

pour enfant equipee de roues directionnelles efficaces et faciles a mettre en ceuvre. for children equipped with efficient and easy to set up directional wheels.

Notamment, ['invention a pour objectif de fournir une telle poussette, In particular, the invention aims to provide such a stroller,

S presentant de bonnes qualites de stabilite, de controle de la direction, de roulage... Having good qualities of stability, steering control, driving ...

Un objectif particulier de ['invention est de fournir une telle poussette, presentant une roue avant (ou, selon ['invention, un bloc de roues) montee en A particular objective of the invention is to provide such a stroller, presenting a front wheel (or, according to the invention, a block of wheels) mounted in

position centrale.central position.

Un autre objectif de ['invention est de fournir une telle poussette, presentant de bonnes qualites de confort et d'ergonomie, tent pour l'enfant Another objective of the invention is to provide such a stroller, having good qualities of comfort and ergonomics, tempting for the child

transporte que pour la personne poussant la poussette. carry only for the person pushing the stroller.

Un objectif particulier de ['invention est encore de fournir une telle poussette, qui soit adaptee et/ou adaptable a differents types de terrains et de A particular objective of the invention is also to provide such a stroller, which is adapted and / or adaptable to different types of terrain and

situation (marches, marche arriere...), de fac,on simple et efficace. situation (steps, reverse ...), so, simple and efficient.

Ces objectifs, ainsi que d'autres qui appara^tront par la suite, vent atteints a ['aide d'une poussette pour enfant, comprenant selon ['invention un train avant suspendu et directionnel, comprenant une partie fixe, suspendue au chassis de ladite poussette, et une partie mobile en rotation par rapport a ladite partie fixe, selon un premier axe de rotation sensiblement vertical, et portent au moins une These objectives, as well as others which will appear later, are achieved using a stroller for children, comprising according to the invention a suspended and directional front axle, comprising a fixed part, suspended from the chassis of said stroller, and a part movable in rotation relative to said fixed part, along a first substantially vertical axis of rotation, and carry at least one

roue.wheel.

On obtient ainsi une poussette efficace, en roulage et en changement de direction, et confortable, basee sur une approche tout a fait nouvelle du train avant. De fa,con avantageuse, ladite partie fixe est suspendue a l'extremite dirigee vers [' avant d' au moins un prolongement audit chassis, et la ou lesdites roues vent portees par un element solidaire de ladite partie mobile s'etendant selon un deuxieme axe sensiblement horizontal, decale vers l'arriere de ladite poussette par This provides an efficient and comfortable stroller when driving and changing direction, based on a completely new approach to the front axle. Fa, con advantageously, said fixed part is suspended at the end directed towards ['before at least one extension to said chassis, and said or said wheels wind carried by an element integral with said movable part extending in a second substantially horizontal axis, shifted towards the rear of said stroller by

rapport audit premier axe.report to said first axis.

En marche avant, la distance projetee entre ces deux axe ameliore le When moving forward, the distance projected between these two axes improves the

confort de roulage.driving comfort.

Preferentiellement, ladite partie fixe et ladite partie mobile vent solidarisees l'une a l'autre a ['aide d'un moyen de fixation axial s'etendant selon Preferably, said fixed part and said movable part are secured to each other by means of an axial fixing means extending according to

ledit premier axe de rotation.said first axis of rotation.

I1 peut par exemple stagir d'une vis epaulee, ou d'une goupille. I1 can for example be trained with a shoulder screw, or a pin.

Avantageusement, la poussette comprend des moyens de suspension montes entre ledit chassis et ladite partie fixe. Ces moyens de suspension peuvent notamment comprendre au moins un ressort monte de facon que ladite partie fixe, le ou lesdits ressorts et ltextremite audit chassis portent ladite partie fixe Advantageously, the stroller comprises suspension means mounted between said chassis and said fixed part. These suspension means may in particular comprise at least one spring mounted so that said fixed part, said spring or springs and the end of said chassis carry said fixed part.

definissent un triangle de suspension. define a suspension triangle.

Selon un autre aspect avantageux de ['invention, la poussette comprend des moyens de verrouillage/deverrouillage de la rotation de ladite partie mobile, solidarisant cette derriere avec ladite patie fixe dans une position mediane, dans According to another advantageous aspect of the invention, the stroller comprises means for locking / unlocking the rotation of said movable part, securing this behind with said fixed part in a middle position, in

laquelle la ou lesdites roues vent paralleles a l'axe de roulage de ladite poussette. which said wheel or wheels are parallel to the axis of travel of said stroller.

Lesdits moyens de verrouillage/deverrouillage peuvent ainsi comprendre avantageusement un element rigide (par exemple un pion, ou plongeur) monte sur ladite partie fixe et cooperant avec un logement prevu a cet effet dans ladite partie mobile. Selon une caracteristique avantageuse, ledit element rigide presente une forme conique ou tronconique. Ceci permet de faciliter le guidage et/ou le Said locking / unlocking means can thus advantageously comprise a rigid element (for example a pin, or plunger) mounted on said fixed part and cooperating with a housing provided for this purpose in said movable part. According to an advantageous characteristic, said rigid element has a conical or frustoconical shape. This makes it easier to guide and / or

rattrapage de jeu de ['element rigide. backlash of the rigid element.

Preferentiellement, ledit element rigide coopere avec un ressort de compression tendant a l'amener dans sa position de verrouillage, lorsque la Preferably, said rigid element cooperates with a compression spring tending to bring it into its locked position, when the

position verrouillee est selectionnee. locked position is selected.

Selon une caracteristique avantageuse, lesdits moyens de verrouillage/deverrouillage vent commandes de facon deportee, a l' aide de According to an advantageous characteristic, the said locking / unlocking means are controlled remotely, using

moyens de commande.control means.

Preferentiellement, lesdits moyens de commande comprennent un levier de commande monte sur le guidon de ladite poussette. Ledit levier de commande peut notamment etre monte sur un bloc de commande comprenant egalement une Preferably, said control means comprise a control lever mounted on the handlebars of said stroller. Said control lever can in particular be mounted on a control block also comprising a

commande de frein.brake control.

Dc facon avantageuse, lesdits moyons de verrouillage/deverrouillage vent Dc advantageously, said locking / unlocking means wind

actionnes par cable.cable operated.

Dans ce cas, preferentiellemcnt, ledit element rigide est monte a ltextremite audit cable, et en ce que ledit ressort de compression est monte sur ledit cable, entre ledit element rigide et une butee. Notamment, lesdits moyens de commande peuvent agir sur la distance entre ladite butee et l'extremite distale In this case, preferably, said rigid element is mounted at the end of said cable, and in that said compression spring is mounted on said cable, between said rigid element and a stop. In particular, said control means can act on the distance between said stop and the distal end

audit element rigide.audit rigid element.

Selon un autre aspect avantageux de l'invention,ladite partie mobile est mobile en rotation par rapport a ladite partie fixe sur une plage angulaire According to another advantageous aspect of the invention, said movable part is movable in rotation relative to said fixed part over an angular range

predeterminee par rapport a l' axe de roulage de ladite poussette. predetermined with respect to the axis of travel of said stroller.

Ladite plage angulaire est preferentiellement symetrique par rapport a l'axe de roulage, et par exemple de l'ordre de 20 a 35 de chaque cote audit axe Said angular range is preferably symmetrical with respect to the driving axis, and for example of the order of 20 to 35 on each side of said axis

de roulage.of rolling.

Selon encore un autre aspect avantageux de ['invention, ledit train avant comprend des moyens de rappel tendant a ramener ladite partie mobile dans une position mediane, dans laquelle la ou lesdites roues vent paralleles a l'axe de According to yet another advantageous aspect of the invention, said front axle comprises return means tending to return said movable part to a middle position, in which the said wheel or wheels are parallel to the axis of

roulage de ladite poussette.rolling said stroller.

De fa,con avantageuse, lesdits moyens de rappel comprennent un ressort de Fa, con advantageously, said return means comprise a spring

torsion monte sur ladite partie fixe. torsion rises on said fixed part.

Selon une autre caracteristique avantageuse de ['invention, ledit train avant comprend des moyens destines a faciliter le mouvement de ladite partie mobile par rapport a ladite partie fixe. Lesdits moyens destines a faciliter le mouvement peuvent notamment comprendre au moins une billet Avantageusement, lesdits moyens destines a faciliter le mouvement According to another advantageous characteristic of the invention, said front axle comprises means intended to facilitate the movement of said movable part relative to said fixed part. Said means intended to facilitate movement can in particular comprise at least one ticket Advantageously, said means intended to facilitate movement

comprennent au moins trots billes, donnant un appui plan. include at least ball trots, giving plane support.

De facon preferentielle, chacune desdites billes est logee dans un fCt a embase spherique menagee dans ladite partie fixe (respectivement ladite partie mobile) et circule dans un chemin de bille de section hemispherique dans ladite Preferably, each of said balls is housed in an fCt with a spherical base arranged in said fixed part (respectively said mobile part) and circulates in a ball path of hemispherical section in said

partie mobile (respectivement ladite partie fixe). mobile part (respectively said fixed part).

D'autres caracteristiques et avantages de ['invention appar:-',ronc pli,s s Other characteristics and advantages of the invention appear: - ', ronc pli, s s

clairement a la lecture dc la description suivante d'un mode de realisation clearly on reading the following description of an embodiment

preferential de ['invention, donne a titre de simple exemple illustratif et non limitatif, et des dessins annexes parmi lesquels: - la figure 1 presente un schema de principe d'une poussette mettant en ccuvre un train avant selon ['invention; - la figure 2 illustre de fa,con plus detaillee le train avant et l'extremite avant de la poussette de la figure 1; - la figure 3 est une vue de la partie mobile du train avant de la figure 2; la figure 4 est une vue de la partie fixe du train avant de la figure 2; la figure 5 presente le pion de verrouillage du train avant de la figure 2; - la figure 6 illustre la poignee de commande du pion de la figure 5 et des moyens de freinage; - les figures 7A a 7C illustrent schematiquement quelques variantes de preferential of the invention, given by way of simple illustrative and nonlimiting example, and of the annexed drawings among which: FIG. 1 shows a schematic diagram of a stroller implementing a front axle according to the invention; - Figure 2 illustrates in fa, con more detail the front axle and the front end of the stroller of Figure 1; - Figure 3 is a view of the movable part of the front axle of Figure 2; Figure 4 is a view of the fixed part of the front axle of Figure 2; Figure 5 shows the locking pin of the front axle of Figure 2; - Figure 6 illustrates the control handle of the pin of Figure 5 and the braking means; - Figures 7A to 7C schematically illustrate some variants of

mise en ccuvre de ['invention.implementation of the invention.

1 5 L' invention concerne done une nouvelle approche du montage et de la mise en ocuvre des roues avant d'une poussette, notamment, mais non exclusivement, pour les poussettes presentant une roue avant (ou un bloc de The invention therefore relates to a new approach to mounting and implementing the front wheels of a stroller, in particular, but not exclusively, for strollers having a front wheel (or a block of

roues) centrale.wheels) central.

La figure 1 presente un schema de principe d'une telle poussette (ce schema etant volontairement simplifie, et non a ltechelle, le train suspendu, notamment, etant de taille grossie par rapport au reste de la poussette), comprenant classiquement un chassis 11 pliable, portent un hamac 12 (ou le cas echeant un autre dispositif pouvant recevoir un ou plusieurs enfants). Le chassis Figure 1 presents a schematic diagram of such a stroller (this diagram being voluntarily simplified, and not to ltechelle, the suspended train, in particular, being of size enlarged compared to the rest of the stroller), conventionally comprising a foldable chassis 11 , carry a hammock 12 (or if necessary another device which can receive one or more children). The chassis

11 re,coit deux roues arrieres 13, montees sur un axe 14. 11 re, costs two rear wheels 13, mounted on an axle 14.

A ['avant, le chassis 11 presente une fourche 15 (ou un element unique, correspondent a la jonction des deux branches de la fourche). Selon ['invention, At the front, the chassis 11 has a fork 15 (or a single element, corresponding to the junction of the two branches of the fork). According to the invention,

un train avant 16 est monte suspendu a l'extremite de cette fourche 15. a front axle 16 is mounted suspended at the end of this fork 15.

Ce train avant 16, illustre plus en detail en figure 2, est forme de deux parties une partie fixe 21 solidaire du chassis 11, et une partie mobile 22, par This front axle 16, illustrated in more detail in FIG. 2, is formed by two parts, a fixed part 21 secured to the chassis 11, and a mobile part 22, by

rapport a la partie fixe 21.relative to the fixed part 21.

Les parties fixe 21 et mobile 22 forment un tout (le train avant). La mobilite de la partie mobile 22 se fait par rapport a un axe sensiblement vertical The fixed parts 21 and mobile 22 form a whole (the front axle). The mobility of the mobile part 22 takes place with respect to a substantially vertical axis

23, de fa,con que la (ou les) roue avant puisse pivoter, par rapport au chassis 11. 23, so that the front wheel (s) can pivot, relative to the chassis 11.

On notera que le terme << fixe >> applique a la partie fixe 21 est relatif a cette rotation par rapport a l'axe 23. Cette partie fixe 21 reste cependant legerement mobile par rapport au chassis, pour assurer une fonction de suspension. La partie fixe 21 est done suspendue a la fourche 15 par un axe horizontal 24, de fa,con a former, avec un (ou plusieurs) element de suspension tel qu'un Note that the term "fixed" applied to the fixed part 21 relates to this rotation relative to the axis 23. This fixed part 21 remains slightly movable relative to the chassis, to ensure a suspension function. The fixed part 21 is therefore suspended from the fork 15 by a horizontal axis 24, so as to form, with one (or more) suspension element such as a

ressort 25, un triangle de suspension. spring 25, a suspension triangle.

La partie mobile 22 est montee en liaison pivot avec la partie fixe 21, a ['aide d'une vis epaulee controlant le serrage des deux pieces. Dans le cas d'une The movable part 22 is mounted in pivot connection with the fixed part 21, using a shoulder screw controlling the tightening of the two parts. In the case of a

roue unique, celle-ci peut etre montee directement sur la partie mobile 22. single wheel, this can be mounted directly on the mobile part 22.

Dans le cas d'un bloc de deux roues, celui-ci presente un axe vertical In the case of a block of two wheels, this has a vertical axis

decentre par rapport a un autre axe horizontal sur lequel les roues vent montees. off center with respect to another horizontal axis on which the wheels are mounted.

L' axe vertical vient se loger, pour y etre solidarise, dans un logement 26 prevu a The vertical axis is housed, to be secured there, in a housing 26 provided for

cet effet dans la partie mobile 22.this effect in the mobile part 22.

En marche avant, la distance projetee entre ces deux axes ameliore le When moving forward, the distance projected between these two axes improves the

confort de roulage, en centrant les deux roues avant dans le sens de la marche. driving comfort, centering the two front wheels in the direction of travel.

En revanche, en marche arriere, cette distance deteriore sensiblement le confort de conduite, les roues avant prenant une position quelconque, et/ou se bloquant dans une de leurs positions extremes (25 par rapport a la direction de On the other hand, when reversing, this distance appreciably deteriorates driving comfort, the front wheels taking any position, and / or locking in one of their extreme positions (25 relative to the direction of

roulage, comme cela appara^tra plus clairement par la suite). rolling, as will appear more clearly later).

Ce probleme est resolu en prevoyant des moyens de verrouillage du train This problem is solved by providing means for locking the train.

avant en position fixe.front in fixed position.

On a vu que ce principe etait connu en soi. Il est cependant peu pratique, sous sa forme connue. Selon un aspect particulier de ['invention, on prevoit done We have seen that this principle was known in itself. However, it is impractical in its known form. According to a particular aspect of the invention, provision is therefore made

une commande de ces moyens de verrouillage deportee sur le guidon. a control of these deportee locking means on the handlebars.

Les moyens de verrouillage vent illustres en figure 5. Un pion 51 est monte a 1'extremite d'un cable, circulant dans u.ne gaine 52, avec un ressor de compression 53. Cet ensemble est assemble sur la partie fixe 21. La gaine 52 vient The wind locking means illustrated in FIG. 5. A pin 51 is mounted at the end of a cable, circulating in a sheath 52, with a compression spring 53. This assembly is assembled on the fixed part 21. The sheath 52 comes

en butee contre une bague 54, contre laquelle s'appuie egalement le ressort 53. in abutment against a ring 54, against which the spring 53 also bears.

La commande deportee permet de faire varier la longueur du cable et done The remote command allows you to vary the length of the cable and done

la longueur L du pion (selon que le ressort 53 est ou non comprime). the length L of the pin (depending on whether the spring 53 is compressed or not).

Dans une premiere position, le pion 51 (ou plongeur), qui s'etend verticalement, n'agit pas (le ressort etant comprime). Dans une seconde position (le ressort repoussant le pion), celui-ci vient plonger dans un logement prevu a cet effet dans la partie mobile 22. Les parties fixe et mobile vent alors solidaires, et la In a first position, the pin 51 (or plunger), which extends vertically, does not act (the spring being compressed). In a second position (the spring pushing the pin back), the latter plunges into a housing provided for this purpose in the mobile part 22. The fixed and mobile parts are then secured, and the

direction est bloquee.direction is blocked.

Bien sur, le logement est positionne de fa,con que les roues se trouvent droites (paralleles aux roues arrieres). Si le pion 51 n'est pas en face de ce logement (c'est-a-dire si les roues ne vent pas droites) lors du verrouillage, le ressort de compression 53 agit sur le pion de facon qu'il assure le verrouillage des que le train passe dans sa position droite. Les moyens de rappel decrits par la suite Of course, the housing is positioned so that the wheels are straight (parallel to the rear wheels). If the pin 51 is not opposite this housing (that is to say if the wheels do not wind straight) during locking, the compression spring 53 acts on the pin so that it ensures the locking as soon as the train passes into its upright position. The means of recall described later

facilitent cette operation.facilitate this operation.

Un mode de realisation de la commande de ces moyens de verrouillage est illustre en figure 6. Un bloc de commande unique 61 regroupe une commande de freinage 62 (connue en soi) et la commande de verrouillage 63, pouvant prendre An embodiment of the control of these locking means is illustrated in FIG. 6. A single control unit 61 groups together a braking control 62 (known per se) and the locking control 63, which can take

deux positions stables P1 et P2, correspondent aux deux positions du pion 51. two stable positions P1 and P2, correspond to the two positions of the pin 51.

La manette 6 3 agit sur le c able 64, vi a de s mo yens 6 5 de demultiplication The joystick 6 3 acts on the cable 64, vi a s 6 6 demultiplication

tirant ou liberant le cable 64.pulling or releasing cable 64.

La figure 3 illustre la partie mobile 22. Dans ce mode de realisation, des moyens 31 et 32 de reception de l'axe des roues vent prevus (il pourrait egalement FIG. 3 illustrates the mobile part 22. In this embodiment, means 31 and 32 for receiving the axis of the wind wheels provided (it could also

etre suspendu).be suspended).

On note la presence du logement 33 prevu pour recevoir le plongeur 51, et The presence of the housing 33 provided for receiving the plunger 51 is noted, and

d'un chemin 34 de guidage de celui-ci tent que les roues ne vent pas droites. a path 34 for guiding it tries that the wheels do not wind straight.

On distingue egalement des chemins de billes 35, 36, et 37, de section There are also paths of balls 35, 36, and 37, of section

hemispherique, cooperant avec des billes montees dans la partie fixe 21. hemispherical, cooperating with balls mounted in the fixed part 21.

La figure 4 illustre cette partie fixe 21. Comme deja mentionne, le train avant est pivotant par rapport a un axe verticah Afin de lirni-tcr les e$. fcrts ei 1es bruits dus aux frottements entre les platines, on prevoit 4 (par exemple) billes 41, 42, 43, 44, logees dans des futs 45, 46, 47, 48 a embase spherique. On obtient Figure 4 illustrates this fixed part 21. As already mentioned, the front axle is pivotable relative to an axis verticah In order to lirni-tcr e $. fcrts ei 1es noises due to friction between the plates, there are 4 (for example) balls 41, 42, 43, 44, housed in drums 45, 46, 47, 48 with spherical base. We obtain

ainsi un roulement sans glissement entre les deux platines. thus a rolling without sliding between the two plates.

Ces quatre billcs, qui ont, par exemple, un diametre de 8 mm, vont done agir comme quatre liaisons ponctuelles, donnant un appui plan (avec un degre d'hyperstatisme). Les chemins de billes 35 a 37 deja mentionnes permettent de ne pas marquer la partie mobile 22 avec l'empreinte des billes. On note que ces chemins vent limites, de fa,con que la rotation soit limitee sur une plage determinee de part et d'autre de la position de repos (roues droites), par exemple de 25 de chaque cote. Par ailleurs, la partie fixe 21 porte un ressort de torsion 49, tendant a ramener la partie mobile 22 dans sa position droite (roue(s) avant dans la meme These four bills, which have, for example, a diameter of 8 mm, will therefore act as four point connections, giving a planar support (with a degree of hyperstatism). The ball paths 35 to 37 already mentioned make it possible not to mark the mobile part 22 with the impression of the balls. It is noted that these wind paths are limited, so that the rotation is limited over a determined range on either side of the rest position (straight wheels), for example 25 on each side. Furthermore, the fixed part 21 carries a torsion spring 49, tending to return the mobile part 22 to its upright position (front wheel (s) in the same

direction que les roues arrieres).direction than the rear wheels).

Les extremites 491, 492 de ce ressort viennent pour ce faire en appui The ends 491, 492 of this spring come to do this in support

contre les butees 391, 392 (figure 3) prevues a cet effet. against the stops 391, 392 (Figure 3) provided for this purpose.

Ainsi, sans manipulation du produit, le train avant se remet en position droite des qutil est deleste (les roues avant ne touchant plus le sol), par exemple, pour monter un trottoir, ou faire une marche arriere. Cela facilite egalement les Thus, without handling the product, the front axle returns to the upright position when it is unloaded (the front wheels no longer touching the ground), for example, to climb a sidewalk, or take a reverse step. It also facilitates

operations de verrouillage decrites precedemment. locking operations described above.

L'invention peut bien sur etre mise en muvre sous de nombreuses autres formes, sans sortir du cadre de ['invention. A titre d'exemple, les figures 7A a 7C illustrent de facon schematique differentes variantes de montage des roues 71 et The invention can of course be implemented in many other forms, without departing from the scope of the invention. By way of example, FIGS. 7A to 7C schematically illustrate different mounting variants of the wheels 71 and

de la liaison du train avant 72 avec le chassis 73. of the connection of the front axle 72 with the chassis 73.

Par ailleurs, les modes de montage, de fixation, de mise en ceuvre des differents composants peuvent varier, en fonction des besoins et des solutions Furthermore, the methods of mounting, fixing, implementing the different components can vary, depending on needs and solutions.

techniques disponibles.techniques available.

Enfin, les differents aspects ameliorant le principe general de ['invention (ressort de rappel, commande deportee du plongeur billes...) ne constituent bien Finally, the various aspects improving the general principle of the invention (return spring, remote control of the ball plunger ...) do not constitute well

sur que des options avantageuses, mais non obligatoires. on that advantageous, but not compulsory, options.

REYENDICATIONSREYENDICATIONS

1. Poussette pour enfant, caracterisee en ce qu'elle comprend un train avant suspendu et directionnel, comprenant une partie fixe, suspendue au chassis de ladite poussette, et une partie mobile en rotation par rapport a ladite partie fixe, selon un premier axe de rotation sensiblement vertical, et portent au moins une roue. 2. Poussette selon la revendication 1, caracterisee en ce que ladite partie fixe est suspendue a l'extremite dirigee vers ['avant d' au moins un prolongement audit chassis, et en ce que la ou lesdites roues vent portees par un element solidaire de ladite partie mobile s'etendant selon un deuxieme axe sensiblement horizontal, decale 1. Stroller for children, characterized in that it comprises a suspended and directional front axle, comprising a fixed part, suspended from the chassis of said stroller, and a part which is able to rotate relative to said fixed part, along a first axis of substantially vertical rotation, and carry at least one wheel. 2. Stroller according to claim 1, characterized in that said fixed part is suspended at the end directed towards ['before at least one extension to said chassis, and in that said wheel or wheels are carried by an element integral with said movable part extending along a second substantially horizontal axis, offset

vers l'arriere de ladite poussette par rapport audit premier axe. towards the rear of said stroller relative to said first axis.

3. Poussette selon l'une quelconque des revendications 1 et 2, caracterisee en 3. Stroller according to any one of claims 1 and 2, characterized in

ce que ladite partie fixe et ladite partie mobile vent solidarisees l'une a l'autre a that said fixed part and said movable part are secured to one another

['aide d'un moyen de fixation axial s'etendant selon ledit premier axe de rotation. ['Using an axial fixing means extending along said first axis of rotation.

4. Poussette selon l'une quelconque des revendications 1 a 3, caracterisee en 4. Stroller according to any one of claims 1 to 3, characterized in

ce qu'elle comprend des moyens de suspension montes entre ledit chassis et ladite what it includes suspension means mounted between said chassis and said

partie fixe.fixed part.

5. Poussette selon la revendication 4, caracterisee en ce que lesdits moyens de suspension comprennent au moins un ressort monte de fac,on que ladite partie fixe, le ou lesdits ressorts et l'extremite audit chassis portent ladite partie fixe 5. Stroller according to claim 4, characterized in that said suspension means comprise at least one spring mounted in such a way that said fixed part, the said spring or springs and the end of said chassis carry said fixed part

definissent un triangle de suspension. define a suspension triangle.

6. Poussette selon l'une quelconque des revendications la 5, caracterisee en 6. Stroller according to any one of claims la 5, characterized in

ce qu'elle comprend des moyens de verrouillage/deverrouillage de la rotation de ladite partie mobile, solidarisant cette derriere avec ladite partie fixe dans une position mediane, dans laquelle la ou lesditesroues vent paralleles a l'axe de that it comprises means for locking / unlocking the rotation of said movable part, securing this behind with said fixed part in a middle position, in which the said wheel or wheels are parallel to the axis of

roulage de ladite poussette.rolling said stroller.

7. Poussette selon la revendication 6, caracterisee en ce que lesdits moyens 3G de verrouillage/deverrouillage comprennent un element rigide mont=, su' lai;; partie fixe et cooperant avec un logement prevu a cet effet dans ladite partie mobile. 8. Poussette selon la revendication 7, caracterisee en ce que ledit element 7. Stroller according to claim 6, characterized in that said 3G locking / unlocking means comprise a rigid element mont =, su 'lai ;; fixed part and cooperating with a housing provided for this purpose in said movable part. 8. Stroller according to claim 7, characterized in that said element

rigide presente une forme conique ou tronconique. rigid has a conical or frustoconical shape.

9. Poussette selon l'une quelconque des revendications 7 et 8, caracterisee en 9. Stroller according to any one of claims 7 and 8, characterized in

ce que ledit element rigide coopere avec un ressort de compression tendant a l'amener dans sa position de verrouillage, lorsque la position verrouillee est selectionnee. that said rigid element cooperates with a compression spring tending to bring it into its locked position, when the locked position is selected.

10. Poussette selon l'une quelconque des revendications 6 a 9, caracterisee en 10. Stroller according to any one of claims 6 to 9, characterized in

ce que lesdits moyens de verrouillage/deverrouillage vent commandes de fa, con that said locking / unlocking means controls fa, con

deportee, a ['aide de moyens de commande. remote, using control means.

11. Poussette selon la revendication 10, caracterisee en ce que lesdits moyens de commande comprennent un levier de commande monte sur le guidon de ladite poussette. 12. Poussette selon la revendication 11, caracterisee en ce que ledit levier de commande est monte sur un bloc de commande comprenant egalement une 11. Stroller according to claim 10, characterized in that said control means comprise a control lever mounted on the handlebars of said stroller. 12. Stroller according to claim 11, characterized in that said control lever is mounted on a control block also comprising a

commande de frein.brake control.

13. Poussette selon l'une quelconque des revendications 10 a 12, caracterisee 13. Stroller according to any one of claims 10 to 12, characterized

en ce que lesdits moyens de verrouillagefdeverrouillage vent actionnes par cable. in that said locking means are operated by cable.

14. Poussette selon les revendications 7 et 13, caracterisee en ce que ledit 14. Stroller according to claims 7 and 13, characterized in that said

element rigide est monte a l'extremite audit cable, et en ce que ledit ressort de rigid element is mounted at the end of said cable, and in that said spring

compression est monte sur ledit cable, entre ledit element rigide et une butee. compression is mounted on said cable, between said rigid element and a stop.

15. Poussette selon la revendication 14, caracterisee en ce que lesdits moyens de commande agissent sur la distance entre ladite butee et l'extremite distale audit 15. Stroller according to claim 14, characterized in that said control means act on the distance between said stop and the end distal to said

element rigide.rigid element.

16. Poussette selon l'une quelconque des revendications 1 a 15, caracterisee 16. Stroller according to any one of claims 1 to 15, characterized

en ce que ladite partie mobile est mobile en rotation par rapport a ladite partie fixe sur une plage angulaire predeterminee par rapport a l' axe de roulage de ladite poussette. 17. Poussette selon la revendication 16, caractefisee en ce que ladite pla in that said movable part is movable in rotation relative to said fixed part over a predetermined angular range relative to the rolling axis of said stroller. 17. Stroller according to claim 16, characterized in that said pla

angulaire est de l'ordre de 20 a 35 de chaque cote audit axe de roulage. angular is of the order of 20 to 35 on each side to said driving axis.

18. Poussette selon l'une quelconque des revendications 1 a 17, caracterisee 18. Stroller according to any one of claims 1 to 17, characterized

en ce que ledit train avant comprend des moyens de rappel tendant a ramener ladite partie mobile dans une position mediane, dans laquelle la ou lesdites roues vent paralleles a l'axe de roulage de ladite poussette. 19. Poussette selon la revendication 18, caracterisee en ce que lesdits moyens in that said front axle comprises return means tending to bring said movable part into a middle position, in which the said wheel or wheels are parallel to the axis of travel of said stroller. 19. Stroller according to claim 18, characterized in that said means

de rappel comprennent un ressort de torsion monte sur ladite partie fixe. return comprise a torsion spring mounted on said fixed part.

20. Poussette selon l'une quelconque des revendications 1 a 19, caracterisee 20. Stroller according to any one of claims 1 to 19, characterized

en ce que ledit train avant comprend des moyens destines a faciliter le mouvement in that said front axle comprises means intended to facilitate movement

de ladite partie mobile par rapport a ladite partie fixe. of said movable part relative to said fixed part.

21. Poussette selon la revendication 20, caracterisee en ce que lesdits moyens destines a faciliter le mouvement comprennent au moins une billet 22. Poussette selon la revendication 21, caracterisee en ce que lesdits moyens destines a faciliter le mouvement comprennent au moins trots billes, donnant un 21. A stroller according to claim 20, characterized in that said means intended to facilitate movement comprise at least one ticket 22. A stroller according to claim 21, characterized in that said means intended to facilitate movement comprise at least trots balls, giving a

appui plan.plan support.

23. Poussette selon l'une quelconque des revendications 21 et 22, caractersee 23. Stroller according to any one of claims 21 and 22, caractersee

en ce que chacune desdites billes est logee dans un fut a embase spherique menagee dans ladite partie fixe (respectivement ladite partie mobile) et circule dans un chemin de bille de section hemispherique dans ladite partie mobile in that each of said balls is housed in a barrel with a spherical base arranged in said fixed part (respectively said mobile part) and circulates in a ball path of hemispherical section in said mobile part