Animation mechanism for watches

Abstract

An animation mechanism (1) for a timepiece (3), comprising a support system (13) supporting a first ornament (11) intended to be animated by rotation about a first axis of rotation (A1) and a second axis of rotation (A2) under the influence of a drive source (5), said support system (13) comprising a first frame (13b) mounted to pivot about said first axis of rotation (A1) in a cage element, and an internal frame (13f) mounted to pivot within said first frame (13b) about said second axis of rotation (A2) substantially perpendicular to said first axis of rotation (A1), said internal frame (13f) supporting a second ornament (23), said internal frame (13f) being arranged to be driven by an eccentric drive element (15b) rigidly fixed to rotate together with a drive wheel (15) arranged to be driven directly or indirectly by said drive source (5).

Description

Technical Field

[0001] The present invention relates to the field of watchmaking. More particularly, it relates to an animation mechanism comprising at least two ornaments, the latter being capable of representing in particular stars.

Background Art

[0002] Patent Document 1 (FR2988866) describes an animation mechanism for precious or semi-precious stones in which a driving spring is arranged to animate the stones by a rotational movement around a single axis of rotation by means of a flexible belt. The stones are attached to the shaft by four claws or jaws that hold the stones in a fixed position. However, the movement of the stones is monotonous and only one side of the stones can be seen, so it always shows the same angle to the wearer, consequently limiting its visibility.

[0003] Patent Document 2 (CH708473) discloses an animation mechanism related to stars comprising a pivoting disk representing the Earth and a disk of larger diameter with a circular opening offset from the center defining the representation of the moon. When this mechanism operates, the representation of the Earth rotates and the representation of the moon orbits around the Earth. An auxiliary disk under the disk of the moon further makes it possible to display the phases of the moon. This mechanism is truly interesting but is limited to a planar display.

[0004] The "GMT" piece commercialized by Greubel Forsey shows the Northern Hemisphere of the Earth in 3D and rotates in front of a 24-hour scale. The visibility of this convex representation is relatively limited, especially when one wants to see places near the equator and in that there is no representation of the moon.

[0005] Patent Document 3 (CH707163) describes various mechanism variations in which a 3D representation of the moon orbiting around an axis is shown and on which a representation of the Earth can be positioned. However, the visibility of the representation of the moon is limited and the possibilities of other different displays are also relatively limited.

[0006] Patent document 4 (WO2006 / 050743) describes a winding mechanism for an automatic watch. While considering that a watch can be an "ornament," this document does not disclose a second ornament in the sense of the present invention.

[0007] Patent document 5 (WO2013 / 004782) discloses a "Cardin" tourbillon in which a spring-loaded balance wheel is supported by an inner ring mounted so as to pivot inside an outer ring. Again, while considering that the spring-loaded balance wheel may be an "ornament," a second ornament in the sense of the present invention is not disclosed therein. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] French Patent Application Publication No. 2988866 [Patent Document 2] Swiss Patent No. 708473 [Patent Document 3] Swiss Patent No. 707163 [Patent Document 4] International Publication No. 2006 / 050743 Pamphlet [Patent Document 5] International Publication No. 2013 / 004782 brochure [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] Therefore, the object of the present invention is to propose an animation mechanism that overcomes the above-mentioned drawbacks at least partially. [Means for solving the problem]

[0010] More specifically, the present invention relates to an animation mechanism as defined by claim 1. The mechanism comprises a support system for supporting a first ornament intended to be animated by rotation around a first and second axis of rotation under the direct or indirect influence of a drive source. The drive source may be mechanical or electrical and may be dedicated to the mechanism or may be a drive source for a clock.

[0011] The support system comprises a first frame mounted to pivot on a cage element about a first axis of rotation, and an inner frame mounted to pivot within the first frame about a second axis of rotation substantially perpendicular to the first axis of rotation (i.e., the inner frame is pivotally attached to the first frame, thus defining a Cardan system), the inner frame directly or indirectly supporting a second ornament. The inner frame (and therefore the first ornament) is driven by an eccentric drive element fixed to a drive wheel so as to rotate with the drive source, which is arranged to be driven directly or indirectly by the drive source.

[0012] These means yield original animations, and the reciprocating motion of the two axes thus obtained allows for a good visualization of the two ornaments. This animation can express a multitude of possibilities, especially when the ornaments are representations of stars, which will become clear from the detailed description of the invention.

[0013] Advantageously, the first ornament is supported by a shaft mounted to pivot within the internal frame about a third axis of rotation, the shaft being fixed or positioned to rotatably engage with a pinion that meshes with teeth coaxial with the drive wheel, and which can be animated by rotation. Thus, the first ornament can pivot about its own axis of rotation.

[0014] In another variation, the first ornament is supported by an auxiliary frame pivotally mounted around a third rotation axis defined by the shaft described above. The auxiliary frame is arranged to be rotationally driven by an intermediate transmission supported by the inner frame and to be driven by a toothed mechanism fixed to the shaft so as to rotate together with it.

[0015] The first ornament can be positioned to pivot at a rotational speed different from that of the shaft, if necessary.

[0016] Advantageously, the eccentric drive element is a crank or a lever, which represents a relatively simple and easily implementable solution.

[0017] Advantageously, the second ornament is positioned to orbit around the first ornament. In this case, the second ornament can be supported by a rotating plate positioned to pivot around the third axis of rotation.

[0018] Advantageously, the rotating plate is rotationally driven by a wheel that is pivotally attached to the rotating plate and engages on one side with a toothed element fixed to rotate together with the shaft, and on the other side with an auxiliary fixed wheel fixed to rotate together with the internal frame. When the shaft pivots, the plate is thus rotationally driven, and the second ornament rotates along a track around the first ornament.

[0019] Advantageously, the second ornament, by being positioned to rotate around its own axis, gives the constructor many possibilities regarding animation.

[0020] Advantageously, the second ornament is positioned so as to be able to rise and fall relative to the plane of the inner frame. This makes it possible, in particular, to represent the fact that the moon's orbit is not collinear with the Earth's equator, or simply to animate another object in this manner.

[0021] Advantageously, the mechanism further comprises a cover surrounding a part of the first ornament. This is useful for showing, for example, the illuminated part of the Earth when the first ornament is a representation of the sun and the second ornament is a representation of the Earth.

[0022] Advantageously, the pivoting guard is arranged to pivot with respect to the second ornament. This is useful for showing, for example, the phases of the moon when the first ornament is a representation of the Earth and the second ornament is a representation of the moon. In that case, the pivoting cover can be non-rotatably fixed to a wheel arranged to be rotationally driven by a toothed element non-rotatably fixed to the shaft.

[0023] This mechanism is particularly envisaged for incorporation in a timepiece.

Brief Description of the Drawings

[0024] Other details of the present invention will become more clearly apparent upon reading the following description while referring to the accompanying drawings. [Figure 1] It is a schematic side view of the animation mechanism in the present invention, and the first frame is not shown. [Figure 2] It is a schematic plan view of the mechanism of FIG. 1, and the line of sight is perpendicular to the plane of the first frame. [Figure 3] It is a schematic side view similar to FIG. 1 showing a modification of the animation mechanism in the present invention. [Figure 4] It is a schematic side view similar to FIG. 1 showing yet another modification of the animation mechanism in the present invention. [Figure 5] It is a schematic side view similar to FIG. 1 showing yet another modification of the animation mechanism in the present invention. [Figure 6] It is a schematic side view similar to FIG. 1 showing yet another modification of the animation mechanism in the present invention.

Embodiments for Carrying out the Invention

[0025] Figures 1 and 2 show a first embodiment of the animation mechanism 1 according to the present invention.

[0026] This first embodiment includes not only a first ornament 11 but also a second ornament 23, which is supported by a specific support system 13. The first ornament is three-dimensional in shape and can be a gemstone, other ornament (such as a sculpture, glass bead, or part of a stone), or a representation of a star, such as a hemisphere or the whole of the Earth, any planet, the Moon, the Sun, a part of the night sky, or at least a part of any other celestial body. The second ornament 23 is off-center from the first ornament 11 and is similarly three-dimensional in shape (a sphere, a hemisphere, etc.). It can be, for example, another gemstone or other object, a representation of the Moon when the first ornament 11 is a representation of the Earth, a representation of a planet when the first ornament 11 is a representation of the Sun, a representation of the Earth when the first object is a representation of the Sun or the night sky, or a representation of another object that is a satellite of what the first ornament 11 represents. It should be noted that each of the ornaments 11 and 23 is separate from the support system 13 and is not a functional element such as a screw, balance wheel, escapement, spring, wheel, or support. In other words, the ornaments 11 and 23 are purely decorative and do not have any mechanical function in motion, either in terms of movement or support.

[0027] The support system 13 connects the ornaments 11 and 23 to the cage elements (not shown) by a pair of pivots 13a supported by a support 13m which is positioned to be fixed to the cage (see Figure 2).

[0028] These pivots 13a define a first axis of rotation A1, around which a first frame 13b (shown only in Figure 2 to avoid excessive Figure 1) is pivoted, which in the illustrated structure is formed by a generally circular annular ring. The first frame 13b can also take other forms (elliptical, square, rectangular, etc.) and is not required to be a perfect ring. This frame 13b supports a pair of intermediate pivots 13d that define a second axis of rotation A2 substantially perpendicular to the first axis A1. An internal frame 13f is mounted inside the first frame 13b so as to pivot around this second axis A2 and supports the first ornament 11. In the illustrated modification, the internal frame 13f takes the form of a circular plate, but other forms (polygonal, framework, or other special forms) are also possible.

[0029] In the illustrated structure, the ornament 11 is supported by a shaft 13h that penetrates the internal frame 13f. The shaft 13h is mounted in a bearing 13k provided in the internal frame 13f and is pivotable relative to the internal frame 13f.

[0030] From the above description, it is clear that the support system, by defining a cardan joint support, grants the internal frame 13f and the two decorative elements 11 and 23 two rotational degrees of freedom with respect to axes A1 and A2, while virtually no translational degrees of freedom. The pivot of the shaft 13h relative to the internal frame 13f grants the first decorative element 11 a third rotational degree of freedom around a third axis A3 corresponding to the geometric axis of the shaft 13h. However, this third degree of freedom is not essential, in which case the first decorative element 11, and optionally the shaft 13h, can be fixed to the internal frame 13f so as to rotate together.

[0031] The drive of the first ornament 11 around the third axis A3 is ensured by the cooperation between the teeth of a pinion 13l fixed within the shaft 13h and a conical tooth 17 coaxial with the drive wheel 15 and fixed in the illustrated structure. Other forms of teeth are also possible, such as internal conical teeth supported by a crown ring or other special gear. Furthermore, the tooth 17 can alternatively be rotationally driven instead of being fixed to the chassis. Note that if the first ornament 11 is fixed to the internal frame 13f so as to rotate together, the pinion 13l and tooth 17 are absent.

[0032] To animate the internal frame 13f, and therefore the ornaments 11 and 23, the mechanism further includes a drive wheel 15 having a toothed wheel 15a arranged to be driven by a drive source 5 such as a barrel housing a drive spring or an electric motor, and optionally a transmission 9 of any form that can kinematically intervene between the drive source 5 and the drive wheel 15. Obviously, the intervention of an auxiliary toothed wheel and / or other forms of kinematic linkage such as a belt or chain is also possible. The drive source 5 may be dedicated to the animation mechanism or may constitute part of a conventional watch movement.

[0033] The drive wheel 15, positioned such that its axis of rotation A4 substantially intersects axes A1 and A2, also includes an eccentric drive element 15b fixed to the toothed wheel 15a so as to rotate with it and connected thereto by a shaft 15d. As shown in the figure, the eccentric drive element 15b takes the form of a lever or a bent crank fixed on the shaft 15d, and the free end of the eccentric element 15b cooperates with the end of the shaft 13h to drive it within a substantially circular path, and the end of the shaft 13h can pivot in a special bearing provided at the free end of the eccentric element. In this way, when the drive wheel 15 rotates, the internal frame 13f is driven by a compound motion having two degrees of freedom of rotation, the amplitude of which is determined by the geometric shape of the support system 13 and the radius of the eccentric drive element 15b. This motion reciprocates around axes A1 and A2, respectively, thereby producing an inclined orbital motion of the first ornament 11.

[0034] Simultaneously, the teeth of the pinion 13l, which is fixed to the shaft 13h, roll on the fixed teeth 17, thereby causing the ornament 11 to pivot around the third axis A3.

[0035] These means allow the ornament 11 to pivot around three axes A1, A2, and A3.

[0036] Other configurations of the drive eccentric 15b are possible, and it goes without saying that the gear ratio can be adapted to the manufacturer's needs in order to animate the ornament 11 by a desired rotational speed with respect to the three rotational axes.

[0037] Additionally, although optional, the presence of a fixed cover 25 that is secured to the internal frame 13f is also mentioned. This fixed cover 25 is positioned to cover a portion of the first ornament 11, for example, to hide the part that is in the Earth's shadow.

[0038] As described above, rotation of the first ornament 11 around the third axis A3 is not essential. In that case, the fixed teeth 17 and the pinion 13l fixed to the shaft 13h do not need to be present, and therefore the movement of the first ornament 11 is defined solely by reciprocating rotation around the two axes A1 and A2.

[0039] Moving on to the second ornament 23, a toothed element 13n is mounted on the shaft 13h so as to be rotatable with it. This toothed element 13n engages with a wheel 21 having a pivot cover 21a, which is positioned to partially enclose the second ornament 23 and pivot around the axis of the wheel 21. In this modification, the second ornament 23 is rotatably fixed to the internal frame 13f and therefore does not pivot around its own axis.

[0040] Depending on the selected gear ratio and drive speed, this structure can represent, for example, the phases of the moon and the approximate parts of the Earth illuminated by the sun in real time, or according to an accelerated animation (which can correspond to accelerated reality or be fantastical), and in either case, the Cardan motion allows the two ornaments 11 and 23 to be viewed from more angles than the prior art, except for the parts covered by their respective covers 21a and 25 (if any).

[0041] However, in the simplified variant, elements 13n and 21 and / or one, the other, or both of the two covers 21a and 25 do not need to be present.

[0042] Figure 3 shows another embodiment of the animation mechanism 1 according to the present invention. This modification differs from those in Figures 1 and 2 in that the second object 23 is mounted to trace an orbit on the internal frame 13f. To obtain the orbital motion of the second object 23 and its cover 21a, the mechanism further comprises a rotating plate 27 that supports the second ornament 23 and is freely mounted on the shaft 13h so as to pivot around axis A3. The plate 27 also supports a wheel 21, which is mounted to pivot on the latter and comprises an upper wheel 21b that meshes with a toothed element 13n and a lower wheel 21c that meshes with an auxiliary fixed wheel 29 fixed to the internal frame 13f. The two toothed elements 21b, 21c constituting the wheel 21 are thus positioned on either side of the plate 27.

[0043] To support the second ornament 23, the rotating plate 27 surrounds a portion of the auxiliary wheel 21b and includes an extension 27a that extends through the center of the wheel 21 to position the second ornament 23 on the visible side of the plate 27.

[0044] When the shaft 13h and the toothed element 13n pivot, the wheel 21 is driven to rotate, and its lower wheel 21c rolls on the auxiliary fixed wheel 29. In this way, the plate 27 pivots around axis A3.

[0045] Through these means, the second ornament 23 rotates along the track around the first ornament 11, and the cover 21a moves relative to the second ornament 23 as described above.

[0046] The same animation described above in the context of the embodiments shown in Figures 1 and 2 can also be obtained with this arrangement.

[0047] Figure 4 shows yet another modification of the animation mechanism 1 according to the present invention, which differs from the modification in Figure 3 in that the second ornament 23 is also positioned to pivot around its own axis A5. To do this, the second ornament 23 is fixed to a wheel 23a so as to be able to rotate together with the wheel 23a, which meshes with a satellite wheel 23b mounted to pivot on a wheel 21c and with an auxiliary tooth 21d fixed to an auxiliary wheel 21b to form a differential gear.

[0048] These means allow the second ornament 23 to rotate along a track around axis A3 and pivot around its own axis A5, and the rotational speed of the various components can be freely selected by changing the gear ratio. Furthermore, in this modification, the covers 2a and 25 are optional, and axis A5 may or may not be parallel to axis A3, and this is true in all embodiments.

[0049] This configuration is particularly well-suited for animating the rotation of the Earth (or other planets) relative to the Sun in real time or accelerated time, but other animations are also possible.

[0050] Figure 5 shows a modified example of the animation mechanism 1 according to the present invention, which differs from that shown in Figures 1 to 4, as will become clear in this specification below.

[0051] The first ornament 11 is supported not by the shaft 13h, but by an auxiliary frame 13p attached to the internal frame 13f so as to pivot around axis A3. Thus, this frame 13p is separated from the toothed element 13n, and these two elements 13p, 13n can thus pivot relative to each other. The first ornament 11 is also fixed to the auxiliary frame 13p, and the cover 21a is rotatably driven by the toothed element 13n fixed to the shaft 13h, as in the embodiments of Figures 1 and 2.

[0052] The auxiliary frame 13p is equipped with peripheral teeth that help drive it around axis A3 by an optional type of intermediate transmission 31 (here consisting of a plurality of intermediate wheels pivoted in the internal frame 13f) which is powered by a pinion 13q fixed to shaft 13h.

[0053] In this configuration, the two sets of decorative elements 11 and 23 pivot around axis A3, and the rotational speed of the cover 21a can be freely selected relative to the rotational speed of the auxiliary frame 13p by changing the gear ratio of the intermediate transmission unit 31 or the ratio between the toothed element 13n and the wheel 21.

[0054] In a modified version not shown, the first ornament 11 is fixed to the shaft 13h so as to be able to rotate together with the auxiliary frame 13p, thereby allowing the two ornaments 11 and 23 to pivot around axis A3 at different rotational speeds.

[0055] These arrangements make it possible to represent the phases of the moon in particular.

[0056] Figure 6 shows yet another modified example of the animation mechanism 1 according to the present invention, which differs from those in Figures 1 and 2 as follows.

[0057] The mechanism 1 in Figure 6 further includes a lifting system 33 arranged to raise and lower the second decorative element 23 relative to the plane of the internal frame 13f.

[0058] This lifting system 33 is supported on its underside (i.e., the side facing the drive wheel 15) by an internal frame 13f.

[0059] The second ornament 23 is supported by a threaded rod 33a, which is indexed to be rotatable relative to the internal frame 13f by special means (not shown) such that the threaded rod 33a cannot pivot relative to the internal frame 13f.

[0060] The threaded rod 33a engages with the threaded tube 33b, and as a result, the rotation of the threaded tube 33b in one or the other direction around axis A5 causes the threaded rod 33a and thereby the second ornament 23 to be raised and lowered, respectively. This rotation is ensured by an intermediate transmission section 31, which is performed by a toothed element 13q fixed to the shaft 13h so as to rotate together, as in the modified example in Figure 5, which is why elements similar to the latter have the same reference numerals.

[0061] The intermediate transmission unit 31 of this modified example comprises an intermittent gear train consisting of two wheels having partial teeth 31a, 31b that mesh with corresponding teeth 33c, 33d, which are fixed to rotate together with the threaded tube 33b and are arranged to pivot in two opposite directions of rotation. Each wheel having partial teeth 31a has teeth extending over half of its circumference, and the two teeth are arranged symmetrically to cause the threaded tube 33b to first be driven in a first direction of rotation under the control of one wheel 31a, 31b, and then to be driven in the other direction of rotation under the control of the other wheel 31b, 31b, by each of the two wheels 31a, 31b pivoting 360° in opposite directions of rotation. Details of other elements of the intermediate transmission unit 31 to reverse the direction of rotation of one wheel 31a, 31b relative to the other are readily available to those skilled in the art and do not require description here.

[0062] Therefore, the second ornament 23 can rise and fall while the mechanism 1 is in operation, and can represent, for example, the moon's motion relative to the Earth's equatorial plane, based on the fact that the moon's orbit is not coplanar with the Earth's equator.

[0063] Naturally, without departing from the framework of the present invention, other mechanisms for raising and lowering the second ornament 23 can be envisioned, for example, based on a combination of cams similar to an automaton.

[0064] Although the present invention has been described above in relation to specific embodiments, other additional modifications can be envisioned without departing from the scope of the invention as defined by the claims.

Claims

1. An animation mechanism (1) for a clock (3), comprising a support system (13) for supporting a first ornament (11) intended to rotate around a first axis of rotation (A1) and a second axis of rotation (A2) under the influence of a drive source (5), The support system (13) comprises a first frame (13b) mounted to the cage element so as to pivot around the first axis of rotation (A1), and an internal frame (13f) mounted to pivot within the first frame (13b) so as to pivot around a second axis of rotation (A2) which is substantially perpendicular to the first axis of rotation (A1), wherein the internal frame (13f) supports the second ornament (23). The internal frame (13f) is arranged to be driven by an eccentric drive element (15b) fixed to a drive wheel (15b) so as to rotate together with the drive wheel (15b) which is arranged to be driven directly or indirectly by the drive source (5). The first ornament (11) is a representation relating to a first gemstone, a first sculpture, a first glass bead, a first stone, or a first star. The second ornament (23) is an animation mechanism relating to a second gemstone, a second sculpture, a second glass bead, a second stone, or a second star.

2. The mechanism (1) according to claim 1, wherein the first ornament (11) is supported by a shaft (13h) mounted to pivot within the internal frame (13f) about a third axis of rotation (A3), the shaft (13h) is fixed to a pinion (13l) that meshes with teeth (17) which are coaxial with the drive wheel (15), and the teeth (17) are fixed or positioned to rotate.

3. The mechanism (1) according to claim 1, wherein the first ornament (11) is supported by an auxiliary frame (13p) mounted to pivot around a third rotation axis (A3) defined by a shaft (13h) mounted to pivot within the internal frame (13f), the shaft (13h) is fixed to a pinion (13l) that meshes with teeth (17) which are coaxial with the drive wheel (15), the teeth (17) are fixed or positioned to rotate, the auxiliary frame (13p) is positioned to be rotationally driven by an intermediate transmission section (31) supported by the internal frame (13f), and is also positioned to be driven by a toothed element (13q) fixed to the shaft (13h) to rotate.

4. The mechanism (1) according to claim 1, wherein the eccentric drive element (15b) is a crank or a lever.

5. The mechanism (1) according to claim 1, wherein the second ornament (23) is arranged to perform orbital motion with respect to the first ornament (11).

6. The mechanism (1) according to claim 5, wherein the first ornament (11) is supported by a shaft (13h) mounted to pivot within the internal frame (13f) about a third rotation axis (A3), the shaft (13h) is fixed to a pinion (13l) that meshes with teeth (17) which are coaxial with the drive wheel (15), the teeth (17) are fixed or positioned to rotate, and the second ornament (23) is supported by a rotating plate (27) positioned to pivot about the third rotation axis (A3).

7. The mechanism (1) according to claim 5, wherein the first ornament (11) is supported on an auxiliary frame (13p) mounted to pivot around a third rotation axis (A3) defined by a shaft (13h) mounted to pivot within the internal frame (13f), the shaft (13h) is fixed to a pinion (13l) that meshes with teeth (17) which are coaxial with the drive wheel (15), the teeth (17) are fixed or positioned to rotate, the auxiliary frame (13p) is positioned to be rotationally driven by an intermediate transmission section (31) supported by the internal frame (13f), and is also positioned to be driven by a toothed element (13q) fixed to the shaft (13h), and the second ornament (23) is supported on a rotating plate (27) positioned to pivot around the third rotation axis (A3).

8. The mechanism (1) according to claim 6, wherein the rotating plate (27) is arranged to be rotationally driven by a wheel (21) which is pivotally attached to the rotating plate (27) and which engages with a toothed element (13n) fixed on one side to rotate together with the shaft (13h), and on the other side engages with an auxiliary fixing wheel (29) fixed to the internal frame (13f) so as to be able to rotate together.

9. The mechanism (1) according to claim 7, wherein the rotating plate (27) is arranged to be rotationally driven by a wheel (21) that engages with an auxiliary fixing wheel (29) that is pivotally attached to the rotating plate (27) and fixed on one side to rotate together with the shaft (13h), and on the other side to rotate together with the internal frame (13f).

10. The mechanism (1) according to claim 1, wherein the second ornament (23) is arranged to rotate about its own axis (A5).

11. The mechanism (1) according to claim 1, wherein the second ornament (23) is arranged to be able to move up and down relative to the plane of the internal frame (13f).

12. The mechanism (1) according to claim 1, further comprising a cover (21a) that surrounds a part of the second ornament (23).

13. The mechanism (1) according to claim 12, wherein the cover (21a) is arranged to pivot around the second ornament (23).

14. The mechanism (1) according to claim 13, wherein the first ornament (11) is supported by a shaft (13h) mounted to pivot within the internal frame (13f) around a third rotation axis (A3), the shaft (13h) is fixed to a pinion (13l) that meshes with teeth (17) which are coaxial with the drive wheel (15), the teeth (17) are fixed or positioned to rotate, and the cover (21a) is fixed to a wheel (21) which is positioned to be rotationally driven by a toothed element fixed to the shaft (13h) so as to rotate.

15. The mechanism (1) according to claim 13, wherein the first ornament (11) is supported on an auxiliary frame (13p) mounted to pivot around a third axis of rotation (A3) defined by a shaft (13h) mounted to pivot within the internal frame (13f), the shaft (13h) is fixed to a pinion (13l) that meshes with teeth (17) coaxial with the drive wheel (15), the teeth (17) are fixed or positioned to rotate, the auxiliary frame (13p) is positioned to be rotationally driven by an intermediate transmission (31) supported by the internal frame (13f), and is also positioned to be driven by a toothed organ (13q) fixed to the shaft (13h), and the cover (21a) is fixed to a wheel (21) that is positioned to be rotationally driven by a toothed organ fixed to the shaft (13h).

16. A clock comprising the mechanism (1) described in claim 1.

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