Timepiece assembly

Abstract

The invention relates to a timepiece assembly (1) for an arbor (81), in particular a barrel arbor, on a blank (91), in particular a bridge or a plate (91); - the arbor (81) comprising a first axis (A80) and a shoulder (82) extending at least in a radial direction relative to the first axis (A80); and - the blank (91) comprising a groove (92) that is oriented along a second axis (A90), the arbor and the blank being configured and / or arranged so as to: - prevent the arbor from moving in translation along a first axis relative to the blank; and - enable the arbor to slide, during assembly, in translation in a groove along the second axis (A90) perpendicular to the first axis.

Description

[0001] DESCRIPTION

[0002] TITLE: Watch assembly.

[0003] Technical field of the invention

[0004] The invention relates to a watch assembly. The invention also relates to a watch movement comprising such a watch assembly. The invention finally relates to a timepiece comprising such a watch assembly or such a watch movement.

[0005] State of the prior art

[0006] In conventional mechanical watch movements, a motor in the form of a barrel comprising a barrel arbor pivotally mounted 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 bridge, a first bearing for guiding the barrel arbor being provided in the plate and a second bearing for guiding the barrel arbor being provided in the barrel bridge.

[0007] Such a barrel assembly is cumbersome in the thickness of the watch movement or in the direction of the axis of the barrel arbor. This is particularly disadvantageous for producing an extra-flat watch movement.

[0008] Presentation of the invention

[0009] The aim of the invention is to provide a watch assembly that overcomes the drawbacks mentioned above and improves the watch assemblies known from the prior art. In particular, the invention provides a simple, removable watch assembly that allows a barrel arbor to be mounted on a movement blank while minimizing the bulk in the direction of the thickness of the watch movement. Summary of the invention

[0010] The invention relates to a watch assembly of an arbor, in particular a barrel arbor, on a blank, in particular a bridge or a plate. The arbor comprises a first axis and a bearing extending at least in a direction radial to the first axis. The blank comprises a groove oriented along a second axis. The arbor and the blank are configured and / or arranged so as to:

[0011] - stop the shaft in translation along the first axis relative to the roughing, and

[0012] - allow the shaft to slide, during assembly, in translation in the groove along the second axis perpendicular to the first axis.

[0013] Different embodiments of the assembly are defined by claims 2 to 6.

[0014] According to the invention, a watch movement is defined by claim 7.

[0015] Different embodiments of the watch movement are defined by claims 8 to 11.

[0016] According to the invention, a timepiece is defined by claim 12.

[0017] According to the invention, mounting methods are defined by claims 13 and 14.

[0018] Methods of carrying out the methods are defined by claim 15.

[0019] According to the invention, a watch device is defined by claim 16. Presentation of the figures

[0020] The objects, characteristics and advantages of the present invention are set forth in detail in the following description of a particular embodiment made without limitation in relation to the attached figures.

[0021] Figure 1 is a view of an embodiment of a timepiece according to the invention, an embodiment of a watch movement according to the invention being shown in more detail in perspective section.

[0022] Figure 2 is a perspective view of the embodiment of the watch movement according to the invention, the barrel ratchet, the barrel arbor and the barrel spring being removed.

[0023] Figure 3 is a partial sectional view of the embodiment of the timepiece according to the invention, the section being made at the level of the barrel arbor.

[0024] Figure 4 is a perspective view of an assembled ratchet-barrel shaft assembly.

[0025] Figure 5 is a perspective view of the embodiment of the watch movement according to the invention.

[0026] Detailed description

[0027] An embodiment of a timepiece 200 is described below in detail with reference to FIGS. 1 to 6. The timepiece 200 is for example a watch, in particular a wristwatch. The timepiece 200 comprises a watch movement 100, intended to be mounted in a timepiece case or box in order to protect it from the external environment. The watch movement 100 may be a mechanical movement, in particular an automatic movement.

[0028] The 100 watch movement includes:

[0029] - a frame 90, in particular a blank or a plate 91, and

[0030] - an 80 barrel mounted on the 90 frame.

[0031] The watch movement 100 also comprises a watch assembly 1 of an arbor 81 of the barrel on the frame 90, in particular the blank 91, in particular the plate 91. The assembly makes it possible to connect the barrel to the frame, in particular to mechanically connect the arbor 81 of the barrel and a wheel 84, in particular a ratchet, to the frame. The mechanical connection is preferably a pivot connection of the arbor 81 to the blank 91, in particular a pivot connection around an axis A80 constituting the axis of the arbor 81.

[0032] In the embodiment described, the plate 91 also constitutes a back, or even a caseband-back. Thus, the back and the plate can be made from a single single piece. The timepiece case or box is advantageously closed by a glass 10.

[0033] The 80 barrel includes:

[0034] - barrel shaft 81,

[0035] - a toothed barrel ring 85 or toothed crown pivoted on the frame or blank 91,

[0036] - a toothed wheel 83 or ratchet 83 fixed on the shaft 81, and

[0037] - a motor spring (not shown) mechanically connecting the toothed ring 85 to a plug 812 formed by an external surface of the shaft 81.

[0038] Preferably, the toothed wheel 83 is fixed to the shaft 81 using a screw 84. More precisely, the toothed wheel 83 and the shaft 81 preferably comprise complementary conformations which fit into each other by translation along the axis A80 and are held in a fitted configuration by the screw 84.

[0039] In the embodiment shown, a mainspring housing is delimited by:

[0040] - the 812 plug,

[0041] - the toothed ring 85,

[0042] - draft 91, and

[0043] - the toothed wheel 83.

[0044] Advantageously, the diameter of the toothed wheel 83 is greater than the diameter of the toothed ring 85 or toothed crown 85.

[0045] Preferably, the toothed ring 85 is guided in rotation on the frame 90, in particular on the blank 91 or on bridges attached to the blank 91, by rollers 70, in particular ruby ​​rollers. To do this, three rollers 70 are preferably used. A single roller 70 is shown in the figures. The rollers are arranged to roll on a cylindrical peripheral surface 851 of the toothed crown.

[0046] The rollers can be pivoted around axes 71 driven into a blank. Preferably, the movement comprises pins 98 adjustable in position parallel to the first axis A80. The pins 98 are preferably arranged so as to define, by contact with the toothed wheel 83, a clearance of the toothed wheel 83 along the first axis A80 and to keep the toothed wheel 83 parallel to the blank 91 and to the crystal 10, even in the presence of forces acting on the teeth of the toothed wheel 83.

[0047] To enable the mechanical connection of the shaft 81 to the blank 91:

[0048] - the shaft 81 comprises a bearing surface 82 extending at least in a radial direction to the first axis A80, and - the blank 91 comprises a groove 92 oriented along a second axis A90, the shaft and the blank being configured and / or arranged so as to:

[0049] - stop the shaft in translation along the first axis A80 relative to the roughing, and

[0050] - allow the shaft to slide in translation in the groove along the second axis A90 perpendicular to the first axis.

[0051] As visible in Figure 3, in the embodiment shown, the barrel shaft has at one of its ends 813, a groove 814 of which one of the flanks 82 forms the bearing surface 82. The groove can be formed by the assembly of several components. The groove 92 made in the blank 91 is itself a T-section groove opening at only one of its ends. This groove is made along the second axis A90. A flank 96 of the groove is arranged to cooperate with the bearing surface 82. By cooperating by contact against each other, it is noted that the flank 96 and the bearing surface 82, once the shaft 81 is engaged in the groove 92, prevent any translational movement of the shaft 81 along the first axis A80. Preferably, the shaft having at least at its end 813 a geometry of revolution and / or the groove having at its non-opening end a geometry of revolution, the shaft can rotate freely in the groove around the axis A80.

[0052] The fact that the groove opens out at one of its ends allows the shaft 81 to be inserted into the groove by moving it in the direction of the second axis A90. Of course, this movement is only possible when the wheel 83 is removed from the end 81 1 of the shaft 81 .

[0053] In the embodiment described and shown, the bearing surface 82 and the flank 96 each form a plane perpendicular to the first axis A80, the two planes acting on each other to limit, along the axis A80, the translation of the shaft 81 relative to the blank 91.

[0054] In an alternative embodiment, the surface 82 could be frustoconical and could cooperate with a frustoconical surface in the groove and / or with inclined plane surfaces in the groove.

[0055] Advantageously, the blank 91 may comprise a plug 93 driven into a hole 94 made in the main part of the blank 91 (i.e. in the rest of the blank 91), in particular a through hole 94. Preferably, the plug 93 is glued into the hole 94, in particular so as to produce a sealed connection. Thus, the blank 91 preferably comprises a plug 93 driven into a main part 91. This makes it possible to produce the main part of the blank 91 and the groove 92 in different materials, the groove 92 being produced in the plug 93.

[0056] In a variant not shown, the hole 94 may be bordered by an excess thickness formed on the main part of the blank 91 (i.e. on the rest of the blank 91). This excess thickness is advantageously local and / or provided locally around the hole 94. Whatever the variant, the hole and the plug may be generally cylindrical or polygonal in shape.

[0057] To mount the barrel 80 on the frame 90 or on the blank 91, we start from a configuration where none of the components of the barrel are placed in the movement.

[0058] The toothed crown 85 is then put in place to arrive at the configuration of figure 2. The shaft 81 is then presented and slid in translation along the second axis A90 in the groove 92.

[0059] The two steps above can be done in any order.

[0060] The motor spring is placed in the housing by connecting it to the plug 812 and the toothed crown 85.

[0061] Finally, the toothed wheel 83 is placed on the shaft 81 and the two components are fixed to each other using the screw 84.

[0062] Alternatively, to what has been described previously, the shaft and the spring can first be attached to each other, then the assembly thus formed can be mounted in the toothed crown previously mounted on the blank 91 or on the frame 90.

[0063] The invention also relates to such an assembly method and to the assembly obtained by implementing this method.

[0064] The toothed wheel 83 or ratchet 83 is intended to mesh with a return 89, such as a return of a kinematic chain for winding the watch. Preferably, this return is arranged to mesh with the toothed wheel 83 or the ratchet 83 at a location such that the actions applied by the return 89 on the toothed wheel 83 or on the ratchet 83 prevent the movement of the shaft 81 in translation in the direction A90 of the groove 92. In particular, the actions may tend to push the shaft 81 in translation towards the bottom of the groove 92.

[0065] Using the solutions described above, the thickness of the watch part is minimized. The thickness of the watch part can be broken down (without taking into account functional clearances) into the sum of:

[0066] - the thickness of the roughing 91, in particular the roughing base,

[0067] - the thickness of the spring housing,

[0068] - the thickness of the toothed wheel 83 or the ratchet 83,

[0069] - the thickness of the ice 10.

[0070] In the preceding description, the assembly has been described applied to the mounting of a barrel arbor on a blank, in particular a plate. However, the assembly can be used to mount any type of watch arbor on a blank, or even more broadly on a watch component.

[0071] Whatever the embodiment and / or the variant, the shaft 81, in particular the barrel shaft, is preferably mounted in a cantilevered manner, that is to say mechanically connected to the frame 90 or to the blank 91 via a bearing, or more generally via a guide, at only one of these ends. This makes it possible in particular to obtain a space-saving assembly in the longitudinal direction to the shaft or along the axis A80.

[0072] Whatever the embodiment and / or the variant, the shaft 81, in particular the barrel shaft, is preferably mounted on the blank 91 or on the frame 90 without passing through the latter in the longitudinal direction to the shaft or in the direction of the axis A80. This makes it possible in particular to ensure a seal between two spaces limited by faces of the blank 91 or of the frame 90 extending at least substantially perpendicular to the shaft or to the axis A80.

[0073] Whatever the embodiment and / or variant, the toothed ring 85 is preferably not guided in rotation on the shaft 81. This makes it possible to do without a mechanical element connecting the toothed ring to the shaft and therefore to obtain a space-saving assembly in the longitudinal direction to the shaft or along the axis A80.

Claims

DEMANDS 1. Watchmaking assembly (1) of a shaft (81), in particular a barrel shaft, on a blank (91), in particular a bridge or a plate (91), - the shaft (81) comprising a first axis (A80) and a span (82) extending at least in a radial direction to the first axis (A80), and - the blank (91) comprising a groove (92) oriented along a second axis (A90), the shaft and the blank being configured and / or arranged so as to: - stop the tree in translation along the first axis relative to the draft, and - to allow the shaft to slide, during assembly, in translation in the groove along the second axis (A90) perpendicular to the first axis.

2. Watch assembly (1) according to claim 1, characterized in that the shaft (81) is mounted in cantilever.

3. Watch assembly (1) according to one of claims 1 and 2, characterized in that the shaft (81) is mounted on the blank (91) without passing through it in the direction of the axis (A80).

4. Watch assembly (1) according to any one of claims 1 to 3, characterized in that the blank (91) comprises a plug (93) driven and / or glued into a hole (94), in particular a through hole (94), made in the rest of the blank. A watch assembly (1) according to claim 4, characterized in that the hole (94) is bordered by a raised area formed locally on the remainder of the blank. A watch assembly (1) according to any one of the preceding claims, characterized in that the shaft (81) is mounted to rotate freely about the first axis (A80) relative to the blank. A watch movement (100) comprising a watch assembly (1) according to any one of the preceding claims. A watch movement (100) according to the preceding claim, characterized in that the shaft (81) is a barrel shaft (80) at one end (811) of which a toothed wheel (83), in particular a ratchet (83), is fixed. Watch movement (100) according to any one of claims 7 to 8, characterized in that the watch movement comprises a barrel (80) and in that a toothed ring (85) of the barrel is pivoted on the blank (91), the toothed ring being mechanically connected to a bung (812) provided on the shaft (81) by a mainspring.A watch movement (100) according to the preceding claim, characterized in that the toothed ring (85) is guided in rotation on the blank (91) by rollers (70), in particular ruby ​​rollers. A watch movement (100) according to the preceding claim, characterized in that the rollers are pivoted about axes (71) driven into a blank (91) and / or in that the watch movement comprises pins (98) adjustable in position according to the. first axis (A80) so as to define, by contact with a gear (83), a gear (83) backlash. Timepiece (200), in particular wristwatch (200), comprising: - a watch assembly (1) according to one of claims 1 to 6, and / or - a watch movement (100) according to any one of claims 7 to 11. A method for assembling a watch assembly (1) according to any one of claims 1 to 6 or a watch movement (100) according to any one of claims 7 to 11 or a watch component (200) according to the preceding claim, the method comprising: - a step of presenting or supplying the shaft (81) and sliding the shaft (81) in translation along a second axis (A90) in the groove (92) of the blank (91) and a step of presenting or supplying the toothed ring (85) and mounting the toothed ring (85) on the blank (91) or on a frame (91), then - a step of supplying and installing a drive spring so as to mechanically link the shaft (81) to the toothed ring (85). Method for assembling a watch assembly (1) according to any one of claims 1 to 6 or a watch movement (100) according to any one of claims 7 to 11 or a watch component (200) according to the preceding claim, the method comprising: - a step of presenting or supplying the toothed ring (85) and mounting the toothed ring (85) on the blank (91) or on a frame (91) and a step of presenting or supplying the shaft (81) and a drive spring and assembling the drive spring to the shaft (81) to obtain an assembly, then - a step of assembling the whole by sliding the shaft (81) in translation along a second axis (A90) in the groove (92) of the blank (91). Assembly method according to claim 13 or 14, characterized in that it comprises, after the steps mentioned above: - a step of mounting the gear (83) on the shaft (81) and fixing the two components to each other. Device obtained by implementing the method according to any one of claims 13 to 15.

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