Patent Application
20250189929
The invention relates to a horological assembly. The invention relates also to a horological movement comprising such a horological assembly. The invention relates finally to a timepiece comprising such a horological assembly or such a horological movement.
In the usual mechanical horological movements, a motor in the form of a barrel comprises a barrel arbor mounted to pivot at each of its ends in bearings provided on a frame of the movement. The arbor is mounted for example between a plate and a barrel bar, a first guiding bearing of the barrel arbor being provided in the plate and a second guiding bearing of the barrel arbor being provided in the barrel bar.
Such a barrel mounting is bulky in the thickness of the horological movement or in the direction of the axis of the barrel arbor. This is particularly detrimental for producing an extra-flat horological movement.
The aim of the invention is to provide a horological assembly that remedies the drawbacks mentioned above and that enhances the horological assemblies known from the prior art. In particular, the invention proposes a horological assembly that is simple, can be dismantled and allows a barrel arbor to be mounted on a rough movement by minimizing the bulk in the thicknesswise direction of the horological movement.
The invention relates to a horological assembly of an arbor, notably a barrel arbor, on a rough movement (ébauche), notably a bar or a plate. The arbor comprises a first axis and a shoulder extending at least in a direction radial to the first axis. The rough movement comprises a groove oriented along a second axis. The arbor and the rough movement are configured and/or arranged so as to:
Different embodiments of the assembly are defined by points 2 to 6 below.
According to the invention, a horological movement is defined by point 7 below.
Different embodiments of the horological movement are defined by points 8 to 11 below.
According to the invention, a timepiece is defined by point 12 below.
According to the invention, mounting methods are defined by points 13 and 14 below.
Modes of execution of the methods are defined by point 15 below.
According to the invention, a horological device is defined by point 16 below.
The objects, features and advantages of the present invention are explained in detail in the following description of a particular embodiment given in a nonlimiting manner in relation to the attached drawings.
An embodiment of a timepiece 200 is described hereinbelow in detail with reference to
The horological movement 100 comprises:
The horological movement 100 also comprises a horological assembly 1 of an arbor 81 of the barrel on the frame 90, in particular the rough movement 91, notably the plate 91. The assembly makes it possible to link the barrel to the frame, in particular to mechanically link the barrel arbor 81 and a wheel 84, notably a ratchet, to the frame. The mechanical link is preferably a pivot link from the arbor 81 to the rough movement 91, in particular a pivot link about an axis A80 constituting the axis of the arbor 81.
In the embodiment described, the plate 91 also constitutes a back, even a middle-back. Thus, the back and the plate can be produced as a same single-piece part. The timepiece casing or case is advantageously closed by a glass 10.
The barrel 80 comprises:
Preferably, the toothed wheel 83 is fixed to the arbor 81 using a screw 84. More precisely, the toothed wheel 83 and the arbor 81 preferably have complementary forms that are nested in one another by translation along the axis A80 and held in nested configuration by the screw 84.
In the embodiment represented, a motor spring recess is delimited by:
Advantageously, the diameter of the toothed wheel 83 is greater than the diameter of the toothed ring 85 or toothed crown 85.
Preferably, the toothed ring 85 is guided in rotation on the frame 90, in particular on the rough movement 91 or on bars added to the rough movement 91, by runners 70, notably runners made of rubies. For this, three runners 70 are preferably used. A single runner 70 is represented in the figures. The runners are arranged to roll on a cylindrical peripheral surface 851 of the toothed crown.
The runners can be pivoted about axes 71 driven into a rough movement. Preferably, the movement comprises pins 98 that can be adjusted in position parallel to the first axis A80. The pins 98 are preferentially arranged so as to define, by contact with the toothed wheel 83, a shake of the toothed wheel 83 on the first axis A80 and to keep the toothed wheel 83 parallel to the rough movement 91 and to the glass 10, even in the presence of forces acting on the toothing of the toothed wheel 83.
To allow the arbor 81 to be mechanically linked to the rough movement 91:
As can be seen in
The fact that the groove opens at one of its ends allows the introduction of the arbor 81 into the groove by displacing it in the direction of the second axis A90. Obviously, this displacement is possible only when the wheel 83 is removed from the end 811 of the arbor 81.
In the embodiment described and represented, the shoulder 82 and the flank 96 each form a plane at right angles to the first axis A80, the two planes acting on one another to limit, on the axis A80, the translation of the arbor 81 relative to the rough movement 91.
In a variant embodiment, the surface 82 could be tapered and could cooperate with a tapered surface in the groove and/or with surfaces in inclined planes in the groove.
Advantageously, the rough movement 91 can comprise a bush 93 driven into the hole 94 formed in the main part of the rough movement 91 (i.e. in the rest of the rough movement 91), notably a through-hole 94. Preferably, the bush 93 is glued in the hole 94, notably so as to produce a seal-tight link. Thus, the rough movement 91 preferably comprises a bush 93 driven into a main part 91. This makes it possible to produce the main part of the rough movement 91 and the groove 92 in different materials, the groove 92 being produced in the bush 93.
In a variant that is not represented, the hole 94 can be bordered by an overthickness formed on the main part of the rough movement 91 (or on the rest of the rough movement 91). This overthickness is advantageously local and/or provided locally around the hole 94. Whatever the variant, the hole and the bush can be overall of cylindrical form or of polygonal form.
For the mounting of the barrel 80 on the frame 90 or on the rough movement 91, the starting point is a configuration in which none of the components of the barrel is put in place in the movement.
The toothed crown 85 is then put in place to arrive at the configuration of
The arbor 81 is then presented and it is slid in translation along the second axis A90 in the groove 92.
The preceding two steps can be performed in any order.
The motor spring is put in place in the recess by linking it to the core 812 and to the toothed crown 85.
Finally, the toothed wheel 83 is put in place on the arbor 81 and the two components are fixed to one another using screws 84.
Alternatively to what has been described previously, the arbor and the spring can first of all be attached to one another, then the duly formed assembly can be mounted in the toothed crown previously mounted on the rough movement 91 or on the frame 90.
The invention relates also to such a mounting method and to the assembly obtained by the implementation of this method.
The toothed wheel 83 or ratchet 83 is intended to mesh with an intermediate wheel 89, such as an intermediate wheel of a kinematic chain of assembly of the watch. Preferably, this intermediate wheel is arranged to mesh with the toothed wheel 83 or the ratchet 83 in a place such that the actions applied by the intermediate wheel 89 to the toothed wheel 83 or to the ratchet 83 prevent the movement of the arbor 81 in translation in the direction A90 of the groove 92. In particular, the actions can tend to push the arbor 81 in translation toward the bottom of the groove 92.
By virtue of the solutions described above, the thickness of the timepiece is minimized. The thickness of the timepiece can be broken down (without functional plays being taken into account) into the sum of:
In the above description, the assembly has been described applied to the mounting of a barrel arbor on a rough movement, in particular a plate. However, the assembly can be used to mount any type of horological arbor on a rough movement, even more broadly on a horological component.
Whatever the embodiment and/or the variant, the arbor 81, notably the barrel arbor, is preferably mounted with overhang, that is to say linked mechanically to the frame 90 or to the rough movement 91 via a bearing, or more generally via guidance, to just one of its ends. This notably makes it possible to obtain an assembly that has little bulk in the direction longitudinal to the arbor or along the axis A80.
Whatever the embodiment and/or the variant, the arbor 81, notably the barrel arbor, is preferably mounted on the rough movement 91 or on the frame 90 without passing through the latter in the direction longitudinal to the arbor or in the direction of the axis A80. This notably makes it possible to ensure a seal-tightness between two spaces limited by faces of the rough movement 91 or of the frame 90 extending at least substantially at right angles to the arbor or to the axis A80.
Whatever the embodiment and/or the variant, the toothed ring 85 is preferably not guided in rotation on the arbor 81. This makes it possible to dispense with a mechanical element linking the toothed ring to the arbor and therefore obtain an assembly that has little bulk in the direction longitudinal to the arbor or along the axis A80.
| Number | Date | Country | Kind |
|---|---|---|---|
| FR2202009 | Mar 2022 | FR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2023/055909 | 3/8/2023 | WO |
