FR2838699A1 - Infant's walking frame, has leading and trailing shafts with wheels, and push section with guide handle, where sections slide against each other for folding without gap between them to trap infants' fingers - Google Patents

Abstract

The infant's walking frame has at least one leading shaft (11) with at least one front wheel, and a trailing shaft (12) fitted with at least one rear wheel. The infant's walking frame has at least one leading shaft (11) with at least one front wheel, and a trailing shaft (12) fitted with at least one rear wheel. A push section (13) works with a guide handle (14). At least two sections of the frame can slide in relation each other without a gap between them. Of the two sections, one has a track, and the other has a slide which moves within the track of the first section, and a hinge structure (15,16) gives a folding action. The frame sections can be of metal, ceramics, plastics or wood.

Description

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  Baby carriage with sliding element chassis without space between

them, and chassis match.

  The field of the invention is that of childcare. More specifically, the invention relates to baby cars, and in particular the folding mechanisms for such baby cars. We already know very many folding techniques for stroller chassis. In general, we seek in particular to reconcile at least some of the following objectives: - folding efficiency, the size of the folded stroller should be as small as possible, in order to facilitate its storage, and its transport, for example in a motor vehicle; simplicity of the folding and unfolding manipulations, the user having to be able to carry out these operations as easily as possible; - strength and security of the child being transported;

  - simplicity and low cost of manufacture.

  Among the various known types of chassis, there is a categorical cited as breakable folding. According to this technique, the push arms are, in the unfolded position, substantially in the extension of the front legs, and tilt relative to the latter during folding. Most often, the tilting of the push arms is done towards the teas, the upper end of the push arms is

approaching the rear wheels.

  There are also known techniques according to which the pusher arms tilt upwards, so that the upper end of the pusher arm approaches the front wheels. Such a technique has in particular been developed by the holder of the present patent application for the strollers cited "all terrain", which wind provided with large wheels (compared to strollers

  conventional), most often fitted with inflatable tires.

  Another known technique is illustrated in FIG. 1. According to this technique, each pusher arm 1 can slide parallel to the front stretcher 2 between a deployed position or the pusher arm substantially extends the t

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  front stretcher and a folded position where the push arm and the front stretcher correspond to the wind arranged side by side. Each rear stretcher 3 is articulated to the

  vicinity of its upper end on the front stretcher correspond.

  These different techniques generally have a common point residing in the sliding of the push arms relative to the front stretchers. These different wind elements produced in the form of metal tubes, and the sliding is based on a constant principle, consists in implementing a connecting piece 4 fixedly mounted on the front stretcher and having a slide, spaced from the point of attachment of the front stretcher , in which the push arm

  can slide parallel to the front stretcher being removed from it.

  The implementation of this mechanical assembly has made it possible to propose several folding techniques using such sliding, in particular the

techniques recalled previously.

  However, this design principle leads to several drawbacks.

  Indeed, the pusher arm is only guided in a portion of the connecting piece of relatively short length. With the wear of the pieces and the gradual appearance of more and more play between them, the sliding is subject to overhang phenomena which cause the folding and / or unfolding

  become painful to execute for the user.

  In addition, the connecting pieces and the push arms are subject to fouling, more or less consequent along the paths taken by the baby carriage, which can lead to sliding blocking phenomena.

when folding or folding.

  Furthermore, during the folding and unfolding operations of the car, the user or the child being transported may inadvertently slide their fingers in the space between the push arm and the front stretcher, at the risk of being subjected to a

  pinching with more or less serious consequences.

  The object of the invention is in particular to relate these different

disadvantages of prior art.

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  More precisely, the invention aims to provide a baby carriage whose chassis implements a mechanical assembly for folding which

  is more manageable than the prior art solutions.

  In this view, the invention aims to provide such a baby carriage in which the sliding is improved, in terms of efficiency and reliability, and which is therefore not or little subject to the effects of use intensive (wear, appearance of games, ...). The invention also aims to provide such a baby carriage in which the mechanical sliding assembly does not undergo, or little, the effects

fouling.

  Another object of the invention is to provide such a baby carriage, the folding of which significantly reduces the risk of pinching fingers or the like.

annoyances of this type.

  Yet another object of the invention is to provide such a car

  for children which is simple to manufacture and assemble.

  The invention also aims to provide such a stroller, including the technical folding means for developing new designs,

new presentations.

  These objectives, as well as others which will appear later, are achieved with the aid of a baby carriage with a folding chassis comprising in particular at least one front stretcher, carry at least one front wheel, a rear stretcher , carry at least one rear wheel, and a pusher, cooperating with a guide handle. According to the invention, said pusher and said stretcher before wind secured to each other in a fa, con to form an assembly of two pieces sliding relative to each other without space between them, a first of said pieces having at least one rail and the second of said pieces having at least one slide

  intended to slide in said rail.

  An improved sliding guide is thus obtained compared with the solutions of the prior art, thanks to the fact that the push arm and the stretcher z slide relative to each other without space between them, one forming a rail and

the other slide.

  Indeed, the rail and the slide restart permanently in direct or indirect contact against each other, the mechanical assembly is not, or not at all, subject to the appearance of games that could affect the proper functioning of the parts in

  sliding as is the case with conventional solutions.

  We therefore obtain a reliable solution perennially.

  In addition, the risk of pinching fingers between the pusher arm and the front stretcher is eliminated since no space appears between these two elements. It should be noted that the invention can be applied to children's cars of the four-wheel type (comprising a front stretcher on each side of the car) than to children's cars of the three-wheeled type (comprising a single stretcher before). According to an advantageous solution, said rear stretcher is articulated with respect to said front stretcher, and has a contact surface with said front stretcher defined in fa, designed to fit into a surface.

  additional defined in said front stretcher.

  Preferably, when said baby carriage is folded, said push button,

  said front stretcher and said rear stretcher, form a contiguous assembly.

  We get this way, we have a particularly ergonomic and

  aesthetic, especially in the folded state of the car for children.

  Advantageously, said contiguous assembly has a homogeneous section

and compact.

  The various elements making up the chassis form, in the folded position of the baby carriage, a compact and rigid assembly which is particularly appreciable for being moved and / or lifted in view for example of its

  loading in the boot of a vehicle.

  According to a first embodiment, at least one ring with low

  coefficient of friction is mounted between said sliding parts.

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  According to another embodiment, at least one part made of a material with a low coefficient of friction is clipped onto said rail and / or onto said slide. In either case, it improves in a way, we note the ability of the parts to slide against each other. Said rod or said piece is advantageously fluorescent (at least for its visible parts), which makes it possible to view the baby carriage more easily in the nun '. Place in this place, such a fluorescent organ will have better resistance over time than fluorescent adhesive tapes or other similar means reported on baby carriages and tend

  in particular to peel off or deteriorate under the effect of various friction.

  Preferably, means for cleaning the wind sliding zone provided, on at least one of said sliding parts. In this case, said cleaning means advantageously comprise at least one scraper brush

goes up to the end of said pusher.

  In this way, we considerably limit the possibilities of fouling of the sliding mechanism, or at the very least, we limit the unrestricted effects of such fouling, this being eliminated as and when

  folding / unfolding of the baby carriage.

  According to an advantageous solution, said pusher and said stretcher before wind connected by a first connecting piece while said front stretcher and said stretcher rear wind connected by a second connecting piece, said first and second connecting pieces coming into abutment one against each other in position

unfolded from said car.

  Preferably, said pusher, said front stretcher and / or said rear wind stretcher made from profiled elements. In this case, said profiled wind elements produced in one of the materials belonging to the group comprising: - aluminum; - anodized aluminum; -

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  - aluminum ceramise; - composite materials; - extruded materials; - pultruded materials; - the YFE; - the PE; - silicone;

- wood.

  In an advantageous manner, the wind profiles produced in extruded metal materials, and in particular in aluminum which brings together numerous advantages, and in particular: - its density, which makes it possible to obtain light parts; - its quality / price ratio; - its surface condition which does not necessarily require additional treatment; - its ability to be worked using simple and common techniques (riveting, welding ...) compared to other materials

  such as for example composites.

  Advantageously, the interior of at least one of said profiled elements is

  adapted to receive at least one specific equipment.

  We thus obtain the possibility of introducing, by hiding, elements or mechanisms inside the profiles, such as for example, paths

of cable.

  According to a first embodiment, the baby carriage comprises two

  symmetrical front stretchers distributed on each side of the chassis.

  According to another method of realization, the baby carriage comprises a

  single sliding assembly, comprising said front stretcher and said pusher.

  In this case, said single sliding assembly preferably extends

  substantially along the longitudinal axis of said baby carriage.

  Other characteristics and advantages of the invention will become more apparent

  clearly on reading the following description of a given embodiment

  by way of illustrative and nonlimiting example and of the drawings among which: FIG. 1, already commented on in the preamble, illustrates a baby carriage according to the prior art; - Figures 2A and 2B show a baby carriage according to the invention, respectively in the folded position and in the unfolded position; - Figures 3 and 4 are sectional views, respectively from above and in perspective, of a joined assembly formed by the front stretcher, the rear stretcher and the push arm of the baby carriage of Figures 2A and 2B; - Figure S is a sectional view of a first embodiment of the means promoting the sliding of the push arm relative to the front stretcher; - Figure 6 is a sectional view of a second embodiment of the means promoting the sliding of the arm

  push rod relative to the front stretcher.

  With reference to FIG. 1, it should be recalled that baby carriages comprising a folding frame include in a conventional and almost constant fashion, according to the prior art, a mechanism for sliding the push arm 1, relative to the stretcher 2 according to which the push arm slides parallel to the

  front stretcher and at a distance from it, being guided by a connecting piece 4.

  The invention proposes a fundamentally new approach and not

  obvious, compared to this prior art.

  As illustrated in FIGS. 2A and 2B, a collapsible baby carriage includes, on each side of the car, a front stretcher 11 carrying at least one front wheel, a rear stretcher 12 carrying one or two wheels (or more)

  rear, and a pusher 13 cooperating with a guide handle 14.

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  It can be noted in these figures that the solution of the invention makes it possible to produce a completely original presentation, aesthetic and ergonomic, limiting

in addition the risk of pinching.

  According to the invention, the pusher 13 and the front stretcher 11 are indeed secured to one another and form an assembly of two pieces sliding one

  compared to the other, with no space between them.

  To do this, as it appears more clearly in FIGS. 3 and 4, the pusher 13 presents a rail 131 while the front stretcher 11 presents a

  slide 111 conforms to slide in the rail 131.

  It is noted that, according to another possible embodiment, the rail could be carried by the front stretcher while the slide would in this case be carried by the pusher. In addition, it is also conceivable to env s ager s s outside the scope of the invention, several rails and / or slides on each of the pieces, or any other combination allowing sliding without space between

rooms.

  According to the embodiment presented, the front stretcher 11, the rear stretcher 12 and the pusher 13 wind made from profiled elements in

  aluminum. These profiled elements may, in other embodiments,

  be made of anodized or ceramized aluminum, composite materials, PTFE or PE, wood, the profiles can be conformed by different techniques, such as extrusion or pultrusion processes for

materials presented there.

  Furthermore, the rear stretcher 12 is articulated relative to the front stretcher 11, using a connecting piece 15 (FIGS. 2A and 2B), for example in

plastic material.

  Thus, the baby carriage according to the invention can be folded out (FIG. 2A), and

folded (Figure 2B).

  In the illustrated embodiment, a complementary connecting piece 16 including a portion 161 (Figure 4) penetrates a recess 113 of complementary shape provided in the front stretcher 11. This complementary connecting piece 16 is mounted on the front stretcher 11 such so that it abuts against the connecting piece 15 when the baby carriage is unfolded. Piece 16 can be made in the same material as piece 1S,

  to give the same overall impression, especially in the unfolded position.

  Note however that the sliding guide of the front stretcher and the pusher, as well as the maintenance of the latter in their respective position, is ensured by this part 16, but by the sole fact of the shape (rail / slide) which is their given according to the invention. Therefore, Exhibit 16 may not appear

  in other possible embodiments.

  In the folded position of the baby carriage, the pusher 13, the front stretcher 11 and the rear stretcher 12 form a contiguous assembly which has a homogeneous and compact section, of elliptical shape according to the present embodiment. Of course, other sections can be considered, and this section

can vary.

  This contiguous assembly is obtained when the car is folded, thanks in particular to the fact that the rear stretcher 12 has a contact surface 121 defined in a way that is designed to fit into a complementary surface 112 of the

front stretcher 11.

  The adjoining assembly is also, and in a complementary manner, formed by

  the pusher 13 and the front stretcher 11 slides to slide one inside the other.

  As an indication, such a joined assembly, and the parts which compose it present, in the embodiment illustrated in figure, the following dimensions: - d, = 37mm; - d: = 36mm; - d3 = 32mm; - d4 = 105 mm; - d5 = 32mm; d6 = 36mm; - d7 = 37mm;

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- d = 43 mm.

  Always for information, the lengths of the lifter, the front stretcher and

  of the rear wind stretcher here respectively of 970 mm, 700 mm and 550 mm.

  It is noted that the shape of the complementary surfaces 112 and 121 is curved according to this embodiment, but could have another

  shape (square, trapezoidal ...) according to other possible embodiments.

  Furthermore, the elliptical shape of the contiguous assembly is essentially

  aesthetic and could therefore be considered differently.

  According to a first embodiment making it possible to optimize the sliding of the pusher 13 relative to the front stretcher 11, rods 17 with low wind friction coefficient mounted between the pusher 13 and the stretcher

before 1 1.

  It is understood that the number and the positioning of these rods 17 as they appear in FIG. 5 are provided for information only and may vary

as much as needed.

  According to another embodiment illustrated in Figure 6, the sliding is provided by means of pads 18 in teflon (or alternatively in plastic, polymer, polyolefin or any other material having a low

coefficient of friction).

  These pads 18 wind conform to be retained on the pusher 13 by clipping means 132 while they partially match the shape of the slide 111 of the stretcher before 11. It is noted that the pads can be

just put on the pusher.

  Preferably, these rods or these pads (or at least their visible parts) are made in a fluorescent material (or containing fluorescent pigments, or covered with a fluorescent coating) or reflective to allow better tracking of the car. child in the nun 'or the half-light.

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  Furthermore, in order to eliminate the fouling liable to appear on the sliding means, or at the very least to limit the effects of this

  fouling, means for cleaning the wind sliding zone provided.

  These cleaning means comprise, according to this embodiment, a scraper brush mounted at the lower end 19 of the pusher 13. It is understood that this scraper brush 13 has a section which follows that of the slide 111 in fa, con to chase from this any dep8t of dust, or others, likely to generate the sliding of the pusher relative to the front stretcher. In addition, or alternatively, such a broom can be mounted to the other

  end, for example in room 15.

  It will be noted that the lower end 14 also plays the role of foot, in

  folded and erected position (Figure 2B).

  The invention is of course not limited to the embodiment described above, but on the contrary relates to all baby cars using

such sliding means.

  Thus, the chassis can be built according to various known approaches, and the kinematics of folding / unfolding can be adapted accordingly. Through

  example, the car can be fitted with three wheels, including a central front wheel.

  According to a particular embodiment of the invention, the baby carriage

  includes a single sliding assembly as described above.

  Preferably, this single set then extends along a central axis relative to the baby carriage (correspond to the plane of the central wheel, in the

case of a three-wheeled car).

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Claims (14)

  1. Baby car with folding chassis comprising at least one front stretcher (11), carrying at least one front wheel, a rear stretcher (12), carrying at least one rear wheel, and a pusher (13), cooperating with a guide handle (14), characterized in that said pusher (13) and said front stretcher (11) are fastened to each other in a manner, designed to form an assembly of two pieces sliding one relative to the other without space between them, a first of said pieces having at least one rail (131) and the second of said pieces having at least one slide (111) provided for sliding in said rail (131).   2. Baby carriage according to claim 1, characterized in that said rear stretcher (12) is articulated relative to said front stretcher (11), and has a contact surface (121) with said front stretcher (11) defined by fa, con to come and register in a complementary surface (112) defined in said front stretcher (11).   3. Baby carriage according to any one of claims 1 and 2,   characterized in that, when said baby carriage is folded, said pusher (13), said front stretcher (11) and said rear stretcher (12) form a jointed assembly. 4. Baby carriage according to claim 3, characterized in that said   contiguous unit presents a homogeneous and compact section.   5. Baby carriage according to any one of claims 1 to 4,   characterized in that at least one rod (17) with a low coefficient of friction is   mounts between said sliding pieces.   6. Baby carriage according to any one of claims 1 to 5,   characterized in that at least one part (18) made of a material with low 13 2838699   coefficient of friction is clipped onto said rail (131) and / or onto said slide (111).   7. Baby carriage according to claim 5 or claim 6, characterized in that said rod (17) and / or said piece (18) is. at least partially, fluorescent.   8. Baby carriage according to any one of claims 1 to 7,   characterized in that means for cleaning the wind sliding zone   provided on at least one of said sliding parts.   9. Baby carriage according to claim 8, characterized in that said cleaning means comprise at least one scraper brush (19) mounted on the end of said pusher (13).   10. Baby carriage according to any one of claims 1 to 9,   characterized in that said pusher (13) and said front stretcher (11) are connected by a first connecting piece (16) while said front stretcher (11) and said rear stretcher (12) are connected by a second connecting piece (15), said first and second connecting pieces abutting one against the other in unfolded position of said car.   11. Baby carriage according to any one of claims 1 to 10,   characterized in that said pusher (13), said front stretcher (11) and / or said   rear stretcher (12) wind made from profiled elements.   12. Baby carriage according to claim 11, characterized in that said profiled wind elements produced in one of the materials belonging to the group comprising: - aluminum; - anodized aluminum; - cerarnise aluminum; - composite materials; - extruded materials; - pultruded materials; - PTFE; 14 2838699 - the PE; - silicone; - wood.   13. Baby carriage according to any one of claims 11 and 12,   characterized in that the interior of at least one of said profiled elements is   adapted to receive at least one specific equipment.   14. Folding chassis for baby carriage according to any one of the claims 1 to 13.   - Baby carriage according to any one of claims 1 to 13,   characterized in that it comprises a single sliding assembly, comprising   said front stretcher and said pusher.   16- Baby carriage according to claim 14, characterized in that said single sliding assembly extends substantially along the longitudinal axis of said baby carriage.