EP2349516B1 - Flying toy able to move by the flapping of wings - Google Patents

Description

Technical Field of the Invention

The invention relates to a flying toy moving in the air by flapping wings.

It concerns the general technical field of flying toys, and more particularly those imitating the flight of a bird of which they may appear.

State of the art

• un corps creux de forme allongé et dans la partie avant duquel est logé un mécanisme d'actionnement des ailes mû au moyen d'un bracelet élastique fournissant la force motrice ;
• deux ailes souples fixées, d'une part, au mécanisme d'actionnement et, d'autre part, sur le corps ;
• un système de remontage permettant de torsader le bracelet élastique moteur.

Patent documents FR 1.604.345 (G. VAN RUYMBEKE ) is EP 0.449.922 (G. VAN RUYMBEKE ) describe a flying toy of this type including:

• a hollow body of elongate shape and in the front part is housed a wing actuation mechanism moved by means of an elastic strap providing the driving force;
• two flexible wings fixed on the one hand to the actuating mechanism and on the other hand on the body;
• a winding system for twisting the elastic motor bracelet.

In this type of flying toy, the actuating mechanism of the wings generally comprises two oscillating levers - or feet of wings - connected or intended to be connected, each to a wing beam on which is fixed the front edge of a flexible wing constituting the wings of said toy. In principle, flapping wings are sufficient to ensure the lift of the flying toy.

The wings actuation mechanism described in the document EP 0.449.922 , comprises a crank rotating two transmission rods. The crank is rotated by the relaxation of the elastic strap. The links are articulated, on the one hand, via one of their ends, on the crank pin and secondly, through their opposite end, on the inner end of the feet of swinging wings. In this configuration, the rotation of the crank causes alternating oscillations of the feet of the wings and therefore the wings.

This current actuating mechanism based on a crank-handle system is relatively simple to perform. However, to function properly, it is necessary to shift the axis of rotation of the wing legs relative to the axis of rotation of the rods. As a result, the bulk of the mechanism must be increased.

Another disadvantage is that it is difficult to obtain a perfect synchronization of flapping wings. Indeed, in practice, we can see that one of the two rods is ahead in its movement up and down relative to the other. For example, referring to Figures 2 or 3 of the document EP 0.449.922 if the crank rotates clockwise, the rod on the right of the drawing z a slight time in advance in its movement up and down relative to the link on the left. It follows that the flapping of the left wing is slightly ahead of the beat of the right wing, which may have a direct impact on the flight of the toy.

In view of this state of affairs, the main objective of the invention is to simplify the design of the wing actuation mechanism of the type described in the patent documents. FR 1.604.345 and EP 0.449.922 .

Another object of the invention is to provide an actuating mechanism whose size is reduced compared to the mechanisms of the prior art.

Yet another object of the invention is to provide an actuating mechanism for a better synchronization of flapping wings.

Disclosure of the invention.

• une structure support,
• un mécanisme d'actionnement des ailes agencé sur la structure support et comportant une manivelle d'entraînement mise en rotation par l'intermédiaire d'un moyen fournissant la force motrice,
• deux ailes souples disposées symétriquement par rapport au plan vertical de symétrie du jouet et reliées d'un part, au niveau des pieds d'ailes, au mécanisme d'actionnement et d'autre part à la structure support, lesdits pieds d'ailes étant montés oscillant autour d'axes disposés symétriquement par rapport au plan vertical de symétrie du jouet.

The solution proposed by the invention is a flying toy able to move by flapping wings and comprising:

• a support structure,
• a wing actuation mechanism arranged on the support structure and having a driving crank rotated by a driving force means,
• two flexible wings arranged symmetrically with respect to the vertical plane of symmetry of the toy and connected on the one hand, at the wing feet, to the actuating mechanism and on the other hand to the support structure, said wing legs being mounted oscillating about axes arranged symmetrically with respect to the vertical plane of symmetry of the toy.

This flying toy is remarkable in that the inner end of a first foot of wing is extended by a slide in which is mounted in pivot-sliding connection the crank pin of the crank so that the rotation of the latter causes the alternately oscillating said first wing root about its axis, said first wing leg having a first gear driving a second gear disposed on the second wing foot, both said gears cooperating so that both said wing legs oscillate alternately and symmetrically about their respective axes.

This new actuating mechanism makes it possible to dispense with the rods usually used in the prior art, and thus to reduce its bulk. In addition, the arrangement of the gears makes it possible to improve the synchronization of the beating of the wings.

Advantageously, the axis of the means providing the driving force, the axis of rotation of the crank and the axis of rotation of the wingtips are located in the same plane.

The means providing the driving force to the crank may be an elastic providing the driving force, a winding device then allowing to twist said elastic.

• un planétaire interne mis en rotation par le moteur électrique,
• un ou plusieurs satellites à double étage,
• un premier planétaire externe fixe sur lequel s'engrène le première étage du ou des satellites,
• un second planétaire externe mobile sur lequel s'engrène le second étage du ou des satellites, ledit second planétaire mettant en rotation la manivelle.

However, the means providing the driving force is preferably an electric motor associated with a gearbox. The latter is an epicyclic train comprising:

• an internal sun gear rotated by the electric motor,
• one or more double-deck satellites,
• a first fixed outer sun gear on which the first stage of the satellite or satellites meshes,
• a second mobile external sun gear on which the second stage of the planet or satellites engages, said second planet gear rotating the crank.

The wings comprise wing beams connected to the feet of the wings, said beams advantageously having a decreasing diameter from said feet of wings to their end. According to a preferred embodiment, the wing beams are formed by straight rods of decreasing diameter connected by molded tubes. In an alternative embodiment, the wing beams are formed of a first portion having a degressive section to the end of which is fixed a straight rod, said first part having a bend type "gooseneck" oriented towards the front of the toy.

Advantageously, the wings comprise wing beams on which is connected the front edge of the main wing, the film forming said wing having a degree of freedom in rotation around said beams.

Description of the figures.

• la figure 1 est une vue schématique de haut montrant l'agencement des différents éléments constitutifs d'un jouet conforme à l'invention,
• la figure 2 est une vue de face du réducteur à train épicycloïdal, le second planétaire externe mobile n'étant pas représenté,
• la figure 3 est une vue en coupe selon A-A du réducteur de la figure 2, montrant l'agencement des différents éléments constitutifs dudit réducteur,
• la figure 4 est le schéma équivalent du train épicycloïdal objet de l'invention,
• les figures 5a et 5b sont des vues de face du mécanisme d'actionnement, respectivement lorsque le maneton de la manivelle est en position haute et lorsque le maneton est en position basse, les engrenages n'étant pas représentés par souci de clarté,
• les figures 6a et 6b sont des vues de face du mécanisme d'actionnement des figures 5a et 5b, respectivement lorsque le maneton de la manivelle est en position haute et lorsque le maneton de la manivelle est en position basse, les engrenages étant représentés,
• la figure 7 est un agrandissement de la section selon B-B du jouet de la figure 1, montrant un exemple de fixation de la voilure au niveau des poutres d'ailes,
• la figure 8 est une vue en coupe représentent un premier mode de réalisation des poutres d'ailes,
• les figures 9a et 9b représentent respectivement une vue de face et une vue de dessus d'un second mode de réalisation des poutre d'ailes.

Other advantages and characteristics of the invention will appear better on reading the description of a preferred embodiment which will follow, with reference to the accompanying drawings, carried out as indicative and non-limiting examples and in which:

• the figure 1 is a schematic top view showing the arrangement of the various constituent elements of a toy according to the invention,
• the figure 2 is a front view of the epicyclic gearbox, the second mobile external sun gear not being shown,
• the figure 3 is a sectional view along AA of the reducer of the figure 2 , showing the arrangement of the different constituent elements of said gear,
• the figure 4 is the equivalent diagram of the epicyclic gear object of the invention,
• the Figures 5a and 5b are front views of the actuating mechanism, respectively when the crank pin is in the up position and when the crankpin is in the low position, the gears are not shown for the sake of clarity,
• the Figures 6a and 6b are front views of the actuating mechanism of Figures 5a and 5b respectively when the crank pin is in the up position and when the crank pin is in the down position, the gears being shown,
• the figure 7 is an enlargement of the section according to BB of the toy of the figure 1 , showing an example of fixing the wing at the level of the wing beams,
• the figure 8 is a sectional view show a first embodiment of the wing beams,
• the Figures 9a and 9b respectively represent a front view and a top view of a second embodiment of the wing beam.

Embodiments of the invention

The flying toy object of the invention is typically a toy imitating the flight of a bird of which it has the appearance. However, it can be any other type of flying toy moving by flapping wings, for example having the appearance of an insect or an imaginary winged character.

By referring to the figure 1 , the toy object of the invention comprises a support structure 1 on which are arranged the various components of the drive mechanism of the wings and the rudder. By a hollow body (not shown) of elongated shape evoking the body of a bird and usually made of plastic material, may cover the support structure 1 to hide the various components of the drive mechanism of the wings and the rudder.

In accordance with the figure 1 , the actuating mechanism 2 of the wings 3a, 3b is arranged on the support structure 1, in the front part thereof. This actuating mechanism 2 makes it possible to communicate identical oscillations to the wings 3a, 3b and more particularly to the wingtips 30a, 30b. This actuating mechanism 2 comprises a drive crank 20 rotated by means 4 providing the driving force. The axis of the means 4 providing the driving force, the axis of rotation 4130 of the crank 20 and the axis of rotation 31a, 31b of the wing legs 30a, 30b are advantageously located in the same plane to reduce the overall size of the assembly. However, another provision may be considered by the skilled person.

The two flexible wings 3a, 3b are arranged symmetrically with respect to the vertical plane of symmetry P of the toy and connected on the one hand, at the level of the wing legs 30a, 30b, to the actuating mechanism 2 and on the other hand to the support structure 1. The wing legs are mounted swinging in both directions about axes 31a, 31b arranged symmetrically with respect to the plane P. In practice, the outer portion of the wing legs 30a, 30b is connected, or arranged to be connected, for example by interlocking, to the wing beams 32a, 32b to which is connected the front edge of the main wing 33a, 33b.

By referring to the figure 7 , it is advantageous to provide free rotation of the film forming the main wing 33a, 33b around the wing beams 32a, 32b. Indeed, the film is not glued on the beam 32a, 32b, but folded and glued on itself, thus forming a gusset around said beam, free to rotate around the latter during the beat. The Applicant has found that this specific configuration increases the thrust of the wings 3a, 3b.

• une avec des poutres d'ailes 32a, 32b droites (figure 8), permettant un vol avec une assiette cabrée (le centre de gravité du jouet étant situé à l'arrière du centre de la voilure 33a, 33b), le voilure de queue 6 étant relevée : le vol est lent et permet une utilisation intérieur, dans une pièce ;
• une avec des poutres d'ailes 32a, 32b incurvées vers l'avant (figures 9a et 9b), permettant un vol avec une assiette plate (le centre de gravité du jouet étant plus proche du centre de la voilure 33a, 33b), le voilure de queue 6 étant plate : le vol est très rapide et plus spectaculaire et permet une utilisation en plein-air car nécessite plus de place.

To improve the flexibility of the flight of the toy, the wing beams 32a, 32b have a decreasing diameter from the wing legs 30a, 30b to their end. In this way, progressivity is achieved in the rigidity of the beams 32a, 32b, which makes it possible to overcome their inertia and ultimately to gain energy.
Referring to a first embodiment shown on the figure 8 , the wing beams 32a, 32b can be made in three distinct parts: three straight rods 321, 322, 322 degressive diameter connected by molded tubes 323. The skilled person may however provide a greater or smaller number of rods.
In an alternative embodiment shown on the Figures 9a and 9b , the wing beams 32a, 32b are formed of a first portion 3210 having a degressive section at the end of which is fixed a straight rod 3220. In this second embodiment, the first portion 3210 has a curvature type " Gooseneck "oriented towards the front of the toy allowing an aesthetic closer to a bird without losing efficiency. This configuration also makes it possible to move the position of the center of the wing towards the front of the toy, which makes it possible to modify the attitude of flight without displacing the center of gravity.
It is therefore possible to provide users with two types of wings 3a, 3b for offering two types of flights:

• one with wing beams 32a, 32b straight ( figure 8 ), allowing a flight with a pitched attitude (the center of gravity of the toy being situated at the rear of the center of the wing 33a, 33b), the tail wing 6 being raised: the flight is slow and allows an interior use, into a room ;
• one with forward flange beams 32a, 32b ( Figures 9a and 9b ), allowing a flight with a flat attitude (the center of gravity of the toy being closer to the center of the wing 33a, 33b), the tail wing 6 being flat: the flight is very fast and more spectacular and allows a use in outdoors because it requires more space.

The wing beams 32a, 32b are usually made of plastic or carbon. However, to further lighten the structure of the toy while maintaining good rigidity, the beams 32a, 32b will be made totally or partially liquid crystal polymer (or LCP for "Liquid Crystal Polymer" in English) combined with carbon fibers. In the example of the figure 8 the different rods 321, 322, 322 are preferably made of carbon fibers. In the example of Figures 9a and 9b , the base rod 3210 may be molded in LCP and the straight rod 3220 carbon fiber.

The rear part of the support structure 1 carries a tail wing 6 arranged symmetrically with respect to the vertical plane of symmetry P of the toy. This tail wing 6 can be steerable and take the place of rudder. However, it is preferred that the rear edges of the main wing 33a, 33b of the wings 3a, 3b are fixed on a rudder 5 whose inclination is controlled by means of a radio-controlled motor 7.

The means providing the driving force 4 to the crank 20 may be an elastic. In this case, a winding device for twisting this elastic will be provided. This type of elastic system providing the driving force to the crank 20 is for example described on the figure 5 patent document EP 0.449.922 .

However, and referring to Figures 2 to 4 , the means providing the driving force 4 is preferably an electric motor 40 associated with a gearbox 41. The electric motor 40 is of the type known to those skilled in the art, powered by battery or battery and whose operation can be controlled by a remote control of the radio control type. By operating this dedicated command, the user can therefore cause the flapping of the wings to maintain the flight of the toy or otherwise stop the beat during landing and / or to simulate planing phases.

• un planétaire interne 410 mis en rotation par le moteur électrique 40,
• un ou plusieurs satellites 411 à double étage, respectivement 411a et 411b,
• un premier planétaire externe fixe 412 sur lequel s'engrène le premier étage 411a du ou des satellites 411,
• un second planétaire externe mobile 413 sur lequel s'engrène le second étage 411b du ou des satellites 411, ledit second planétaire mettant en rotation la manivelle 20.

The gearbox 41 is preferably, but not necessarily, an epicyclic gear train comprising:

• an internal sun gear 410 rotated by the electric motor 40,
• one or more double-deck satellites 411, 411a and 411b respectively,
• a first fixed external sun gear 412 on which the first stage 411a of the 411 satellite or satellites is meshing,
• a second mobile external sun gear 413 on which the second stage 411b of the planet or satellites 411 engages, said second planet gear rotating the crank 20.

The rotation axes A of the inner sun gear 410, the second mobile outer sun gear 413 and the crank 20 are coaxial. In practice, three satellites 411 are used homogeneously distributed around the first fixed outer sun gear 412. These satellites 411 are supported by a cage, or planet carrier 414, having a degree of freedom in rotation on one side around the internal sun gear 410 and on the other side about the axis of the second mobile external sun gear 413. The satellites 411 are rotatably mounted about their axis in the planet carrier 414.

The first fixed outer sun gear 412 is in the form of a hollow plastic cylindrical body fixed on the support structure 1. The upstream end of this cylindrical body serves as a housing for part or all of the motor 40. end-end is provided with a ring gear 412a on which the teeth of the first stage 411a of the 411 satellites mesh. Referring to FIG. figure 2 fastening tabs 4120 are provided on the outer periphery of the cylindrical body.

The second mobile external sun gear 413 is in the form of a plastic cup whose open end fits at the downstream end of the cylindrical body forming the first fixed outer sun gear 412. This adjustment, however, leaves the second sun gear movable outer 413 a degree of freedom in rotation about the common axis A. The open end is provided with a ring gear 413b on which meshes the teeth of the second stage 411 b satellites 411. The second mobile external sun gear 413 ends with an axis 4130 at the distal end of which is fixed the crank 20.

A part 10 fixing by screwing or clipping at the fixing lugs 4120 tightly closes the assembly or not. The 4130 axis of the second mobile external sun gear 413 is rotatably mounted in the piece 10 and passes through the latter.

The operation of this epicyclic gear train is as follows: the rotation of the internal sun gear 410 by the motor 40, forces the satellites 411, via their first stage 411b, to roll inside the ring gear 412a of the first external sun gear 412 In their rotational movement, the satellites 411 drive in rotation, via their second stage 411 b, the ring gear 413b of the second mobile external sun gear 413 and therefore the output shaft 4130.

Avec:

• Z₄₁₀ = nombre de dents du planétaire interne 410,
• Z_411a= nombre de dents du premier étage 411a du satellite 411,
• Z_411b = nombre de dents du second étage 411 b du satellite 411,
• Z_412a = nombre de dents de la première couronne dentée 412a,
• Z_413b = nombre de dents de la seconde couronne dentée 413b.

A two-stage planetary gearbox is thus used, where each stage has its own toothing module, which makes it possible to have different numbers of teeth on the toothed crowns 412a, 413b, and thus to create a gear ratio that plays on the difference between the teeth. number of teeth and therefore obtain huge reduction values if necessary. The formula giving the total reduction is as follows: $$\mathrm{Total\; reduction}={\mathrm{Z}}_{\mathrm{410}}\mathrm{x}/\left({\mathrm{<figure-callout\; id="412"\; label="Z"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{\mathrm{412}\mathrm{at}}+{\mathrm{Z}}_{\mathrm{410}}\right)\mathrm{x}\left({\mathrm{<figure-callout\; id="412"\; label="Z"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{\mathrm{412}\mathrm{at}}\mathrm{<figure-callout\; id="411"\; label="x\; Z"\; filenames="imgf0002.png"\; state="\{\{state\}\}">x\; </figure-callout>}{\mathrm{Z}}_{}{\mathrm{}}_{\mathrm{411}\mathrm{b}}/{\mathrm{<figure-callout\; id="413"\; label="Z"\; filenames="imgf0002.png,imgf0003.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{\mathrm{413}\mathrm{b}}/{\mathrm{<figure-callout\; id="411"\; label="Z"\; filenames="imgf0002.png"\; state="\{\{state\}\}">Z</figure-callout>}}_{\mathrm{411}\mathrm{at}}-\mathrm{1}\right)$$

With:

• Z ₄₁₀ = number of teeth of the internal sun gear 410,
• Z _411a = number of teeth of the first stage 411a of the satellite 411,
• Z _411b = number of teeth of the second stage _411b of the satellite 411,
• Z _412a = number of teeth of the first ring gear 412a,
• Z _413b = number of teeth of the second ring gear 413b.

The classical formulas of the gears are given in Table 1 below: <u> Table 1 </ u> Outdoors Interior (i) From = _primitive D + 2m Di = (Z - 2) m _Primitive = mZ _Primitive = mZ Module m = From / (2 + Z) m = Di / (Z - 2) Z = De / m - 2 Z = Di / m + 2

Table 2 illustrates the reduction that can be achieved with the epicyclic gear according to the invention. <u> Table 2 </ u> Reference elements 410 411a 411b 412a 413b spacing Z (teeth) 6 15 14 36 33 Of 4 8.5 8.8 _Primitive 3 7.5 7.7 18 18.23 410 / 411a = 5.25 di 17 17.13 411a / 411b = 9.09 Module m 0.5 0.5 0.55 0.5 0.55 Reduction 0003 Demultiplication (1 / reduction) 385

We can therefore obtain with these values of teeth (fairly small gears and a minimum size), a huge reduction of 385.

In the case of the flying toy object of the invention, it is sufficient to provide a reduction of 36, allowing a beat frequency of about 15 Hz (900 beats per minute), for a motor rotation of 32400 Rotation Per Minute. An internal planetary 410 with 9 teeth is chosen for optimal performance. Also, the module of the second stage 411b of the satellite 411 is set higher than that of the first stage 411a because it must cash a larger torque.

Table 3 illustrates a model chosen for the flying toy object of the invention. <u> Table 3 </ u> Reference elements 410 411a 411b 412a 413b spacing Z (teeth) 9 18 8 45 24 410 / 411a = 2.02
411a / 411b = 3.51 Of 1.65 3 2.53 _Primitive 1.35 2.7 2.02 6.75 6.07 di 6.45 5.57 Module m 0.15 0.15 0.25 0.15 0.25 Reduction - 0.028 Demultiplication (1 / reduction) - 36

The result is a gear with a weight and a size well below that of a conventional gear train using the same gear modules, and for the same reduction.

The wing actuation mechanism will now be described in more detail with reference to the Figures 5a to 6b . The part 10 fixed to the front of the support structure 1 comprises two lugs 10a, 10b extending outwards and arranged symmetrically with respect to the vertical plane of symmetry P. The axes of rotation 31a, 31b of the feet wings 30a, 30b are attached to the ends of the tabs 10a, 10b. The end of the axis 4130 of the second outer sun gear 413 comprises a flat part for locking the crank 20 in rotation. As mentioned above, the latter is rotated by the means 4 supplying the driving force which is either a geared motor. evening, an elastic band to twist.

According to the invention, the inner end of a first wing leg 30b is extended by a slide 300b in which is mounted in pivot-sliding connection the crank pin of the crank 20. The axis G of the slide 300b is coaxial with the axis of the wing beam 32b associated with the first wing leg 30b. By pivot-sliding connection is meant in the sense of the present invention that the crank pin 20 combines a translational movement and a rotational movement in the slide 300b. To limit friction, it is advantageous to fix on the crank pin crank 20 a roller 200 adapted to roll in the slide 300b. In this configuration, the rotation of the crank 20 causes the alternating oscillation of the first foot 30b about its axis 31b ( Figures 5a and 5b ).

Referring now to Figures 6a and 6b, the first wing leg 30b includes a first gear 301b driving a second gear 301a disposed on the second wing leg 30a. In practice, the gears 301a, 301b are similar toothed gear portions, meshing at the vertical plane of symmetry P. The two gears 301a, 301b cooperate so that the two legs of the wings 30a, 30b oscillate alternately and symmetrically around their respective axes 31a, 31b. The first wing leg 30b thus transmits its oscillation movement to the second shaft 30a via the gear system 301a, 301b, which makes it possible to have optimum synchronization of the flapping of the wings.

Claims (11)

1. Flying toy able to move by the flapping of wings and comprising:

   - a support structure (1)

   - a wing actuating mechanism (2) arranged on the support structure (1) and comprising a drive crank (20) turned through the intermediary of a means (4) supplying the motive power,

   - two flexible wings (3a, 3b) arranged symmetrically with respect to the vertical plane of symmetry (P) of the toy and connected, firstly, at the wing roots (30a, 30b) to the actuating mechanism (2) and secondly to the support structure (1), the said wing roots being mounted so that they oscillate about axles (31a, 31b) arranged symmetrically with respect to the said vertical plane of symmetry of the toy,

   characterized in that the internal end of a first wing root (30b) is extended by a guideway (300b) in which the wrist of the crank (20) is mounted as a sliding pivot connection so that the rotation of this crank causes the said first wing root to oscillate back and forth about its axle, the said first wing root comprising a first gear (301b) driving a second gear (301a) arranged on the second wing root (30a), the two said gears engaging in such a way that the two said wing roots oscillate back and forth symmetrically about their respective axle.
2. Toy according to Claim 1, in which the axis of the means (4) providing the motive power, the axle (4130) about which the crank (20) rotates and the axle (31a, 31b) about which the wing roots (30a, 30b) rotate are situated all in one same plane.
3. Toy according to one of the preceding claims, in which the means (4) supplying the motive power turning the crank (20) is an elastic band supplying the motive power, a rewinding device allowing said elastic band to be twisted.
4. Toy according to one of Claims 1 and 2, in which the means (4) supplying the motive power turning the crank (20) is an electric motor (40) associated with a reduction gear (41).
5. Toy according to Claim 4, in which the reduction gear (41) is an epicyclic gearset comprising:

   - an sun gear (410) turned by the electric motor (40),

   - one or more two-stage planet pinions (411),

   - a fixed first annulus gear (412) with which the first stage (411a) of the planet pinion or pinions (411) meshes,

   - a mobile second annulus gear (413) with which the second stage (411b) of the planet pinion or pinions (411) meshes, the said second annulus gear turning the crank (20).
6. Toy according to Claim 5, in which the epicyclic gearset comprises three planet pinions (411) evenly distributed about the fixed first annulus gear (412).
7. Toy according to either of Claims 5 and 6, in which the planet pinions (411) are supported by a planet carrier (414) having a degree of freedom to rotate on the one hand about the sun gear (410) and on the other hand about the axis of the mobile second annulus gear (413), the said planet pinions being mounted with the ability to rotate about their axis in the said planet carrier.
8. Toy according to one of the preceding claims, in which the wings (3a, 3b) comprise wing spars (32a, 32b) connected to the wing roots (30a, 30b), the said spars having a diameter that decreases from the said wing roots to their tips.
9. Toy according to Claim 8, in which the wing spars (32a, 32b) are formed by straight rods (321, 322, 322) of decreasing diameter connected by moulded tubes (323).
10. Toy according to Claim 8, in which the wing spars (32a, 32b) are formed of a first part (3210) having a decreasing cross section to the end of which a straight rod (3220) is fixed, the said first part having a "swan neck" curvature oriented towards the front of the said toy.
11. Toy according to one of the preceding claims, in which the wings (3a, 3b) comprise wing spars (32a, 32b) to which the front edge of the main wing structure (33a, 33b) is connected, the film that forms the said wing structure having a degree of freedom to rotate about the said spars.

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