Patent Application
20230248126
The present invention relates to the field of jewelry. It concerns more particularly a mobile support mechanism an object, such as a jewel, a precious or semi-precious stone, a sculpture or any other miniature object, the mechanism being adapted for being integrated into a wearable piece of jewelry.
It is well-known to mount an object such as a precious or semiprecious jewel, sculpture or similar in a pivoting way in a piece of jewelry such that it can move about at least one pivot axis under the effect of gravity and of the movements of the piece, as disclosed for instance in documents US2012/151963, KR102210833, CN111802757 and others.
However, the movements of the objects tend to be fluttery, which can be irksome for the wearer if he or she wishes to observe the object. Furthermore, it can be difficult to observe much of the surface of the object, particularly if the pivoting angle is not limited.
The aim of the invention is to at least partially overcome these drawbacks of the prior art.
More precisely, the invention relates to a mobile support mechanism for an object as disclosed, this mobile support mechanism being adapted for being integrated into a wearable piece of jewelry and comprising a support system bearing an object that is intended to be animated in rotation about a first axis of rotation under the effect of an unbalance within said support system, i.e. within the support system itself and/or the object and/or any additional weights attached within the support system.
Said support system comprises a first frame that is pivotably mounted on a chassis element about said first axis of rotation, and an inner frame that is pivotably mounted in said first frame about a second pivot axis which is substantially orthogonal with respect to said first pivot axis.
Said object is mounted directly or indirectly to a first extremity of a shaft mounted in said inner frame, a second extremity of said shaft being supported by an eccentric element pivotably mounted to a static frame element at a rotation point such that it can freely rotate therearound and thereby hold the shaft at a predetermined angle in said support system.
As a result, the unbalance of the system causes the object to move under the effect of gravity and of movements of the piece in a manner constrained by the support system and the eccentric element (i.e. in an inclined orbital motion), minimizing “fluttery” movements and maintaining an angle of presentation which improves the viewability of the object compared to the prior art.
Advantageously, said shaft is rotatably mounted in said inner frame about a third axis of rotation and comprises a gear meshing with a toothing which is coaxial with said rotation point. The object hence also rotates around the geometric axis of the shaft as it carries out its inclined orbital motion. Said toothing may be fixed or arranged such that a rotation can be imparted thereto.
Advantageously, said eccentric element is a crank or a lever.
Advantageously, at least a portion of said object extends out of the assembly of said frames.
Advantageously, said unbalance is at least partially due to the mass of said object. More specifically, the center of mass of the ensemble of elements pivoting about the second axis of rotation is situated remotely from the intersection of said first and second axes of rotation in order to create this unbalance. The center of mass may be situated on the side of said intersection situated towards the second extremity of the shaft, or conversely on the side of said intersection situated away from the second extremity of the shaft.
The above features may naturally be combined in any way which does not result in a contradiction.
Further details of the invention will become more apparent upon reading the following description, made in connection with the appended drawings, in which:
The mechanism 1 does not comprise any external driving means, and relies upon an internal unbalance in order to cause the object 11 to move under the effects of gravity and/or of the movement of the piece.
The animated object 11 is supported by a very particular support system 13, which connects it to a chassis element 3 (not shown explicitly but illustrated schematically by means of ground lines in
These pivots 13a define a first pivot axis A1, about which is pivoted a first frame 13b composed of an annular ring of generally circular shape. Other shapes (oval, square, rectangular, etc.) are also possible. This frame 13b bears a pair of intermediate pivots 13d, which define a second axis of rotation A2 that is substantially orthogonal with respect to said first axis A1. An inner frame 13f is pivotably mounted about this second axis A2 inside the first frame 13b and is secured to a base 13g which directly or indirectly bears the animated object 11. The inner frame 13f is composed of a part having a substantially circular shape, as well as two arms 13f1 which connect the pivots 13d to the base 13g. It goes without saying that other shapes are also possible and it is even not obligatory for the frame 13f to comprise the annular part. Indeed, the base 13g may simply be connected to the pivots by the arms 13f1 or by another ad hoc arrangement.
At least one of the frames 13b, 13f may be equipped with any type of decoration, for example an enameling, precious or semi-precious stones or any other desired decoration. Furthermore, at least one of the shafts of the pivots 13d, 13a may project beyond the surface of the element through which it passes, that is to say the outer surface of the first frame 13b for the pivots 13d or the outer surface of the support 13m in the case of the pivots 13a, and may bear a decoration, such as for example a precious or semi-precious stone. The movement of this stone will thus generate scintillations which will enhance the perception of the pivoting of the frame with which the stone conjointly rotates.
It should also be noted that none of the frames 13b, 13f is superposed over the animated object 11, which extends from the latter 13b, 13f and thus protrudes, thus maximizing its visibility. In other words, at least part of said object 11 is further away from the drive wheel 15 than the entirety of the frames 13b, 13f.
In the embodiment illustrated, the animated object 11 is supported by a shaft 13h having a first extremity and a second extremity, which passes through the base 13g and is secured to a support 13j in which the animated object 11 is fixed by setting at a first extremity of the shaft 13h. As an alternative, the object 11 may be fixed there by gluing, screwing, soldering, driving or the like, depending on the nature of the object 11 and the support 13j, and it is noted that the animated object 11 may be coaxial with the shaft 13h or may be decentered with respect to this latter. Furthermore, the link between the animated object 11 and the inner frame 13f may comprise a flexible element, for example made of elastomer, to allow the object to gently “float” under the effect of the movement of the piece.
The shaft 13h is mounted in bearings 13k provided in the base 13g such that said shaft 13h may pivot with respect to this latter, although this is optional.
In view of the foregoing, it is clear that the support system defines a gimbal support, which confers two degrees of rotational freedom on the animated object 11 and, substantially, no degree of translational freedom. The pivoting of the shaft 13h in the base 13g confers a third degree of rotational freedom on the object set in motion 11 about a third axis A3, which corresponds to the geometric axis of the shaft 13h. However, this third degree of freedom is not obligatory, as explained below, in which case the shaft 13h may be integrated in the inner frame.
The second extremity of the shaft 13h is supported by an eccentric element 15 mounted pivotably about a rotation point 15a which is defined in the illustrated embodiment by an arbor 15b pivotably mounted in a frame element. Alternatively, the rotation point 15a can be formed as a pin, stud or screw about which the eccentric element 15 can freely rotate. Eccentric element 15 is preferably a lever or a crank, although it may also be a disk provided with an opening, gimbal joint or similar for supporting the second extremity of the shaft 13h.
As illustrated, the second extremity of the shaft also bears a gear 13l which meshes with a toothing 17 provided on a static frame element coaxially with the rotation point 15a. This toothing 17 may be fixed or arranged so as to be rotatable by means of a suitable mechanism such as a timepiece movement, drive spring, electric motor or similar.
Alternatively, in the case in which the third axis of rotation A3 is not provided, the gear 13l and the toothing 17 can be omitted.
The angle of tilt of the shaft 13h is set by the distance between the point at which the second extremity interfaces with the eccentric element 15 and the rotation point 15a, and can be predetermined according to the needs of the constructor.
The movement of the object 11 is generated by an unbalance in the mechanism 1, created for instance by the weight and position of the object 11 and/or the inner frame 13f and/or base 13g, or by a supplemental weight (not illustrated) attached directly or indirectly to the inner frame 13f at a suitable location, which results in the center of mass M of the ensemble of elements pivoted about the second axis A2 (i.e. the inner frame 13f, the object 11, shaft 13h etc.) being situated remote from the intersection of the first and second axes A1, A2 on one or other side thereof.
This unbalance results in that the object 11 will move about axes A1 and A2 in an inclined orbital motion, and also about axis A3 (unless not present), according to the constraints imposed by the construction of the support 13 and the eccentric element 15 in response to movements of the piece 5 and the direction of the gravity vector. This results in smooth, non-fluttery movements and make it easy for the observer to view the object 11 from a variety of angles.
In order to allow the object 11 to be illuminated from below (that is to say, from the direction of the eccentric element 15), the support system 13 may be located inside, or superposed on, a polished well (not illustrated), which may take for example the form of a cup, a parabolic, elliptical or hemispherical mirror or the like, which is arranged to direct the ambient light onto the lower face of the object. As a further alternative, a light source (for example a tritium element, one or more LEDs or the like) may be positioned underneath the object and the frames 13b, 13f. In this way, if the object 11 is a stone, its scintillations may be improved.
It is possible for the mechanism 1 described above not just to represent the only mechanism in a piece of jewelry 5, but to be able for example to be combined with a mechanical or electrical watch movement, in the event that the piece of jewelry 5 is a timepiece such as a wristwatch, pocket watch or the like.
Although the invention has been described above in connection with specific embodiments, other additional variants can also be envisaged without departing from the scope of the invention as defined by the claims.
