CH718864B1 - Compact module including an oscillator-escapement system for a watch movement. - Google Patents

Abstract

The invention relates to a compact watch module, a watch movement with such a watch module and a watch with such a watch module. According to the invention, the watch module (100) comprises an escapement member (20), an oscillator member (30) and a frame (40), said escapement member (20) comprising an escapement mobile (21 ) rotatably mounted around an exhaust axis (A2) via a single exhaust pivot connection (P2) between the exhaust mobile (21) and the frame (40), said oscillator member (30) comprising an assembly sprung balance (31) rotatably mounted around an oscillator axis (A3) via a single oscillator pivot connection (P3) between said sprung balance assembly (31) and the frame (40), in which said axis exhaust (A2) and said oscillator axis (A3) are coaxial. Said exhaust pivot connection (P2) and said oscillator pivot connection (P3) have at least one common plane (P1) orthogonal to the escapement axis (A2) and the oscillator axis (A3)

Description

Technical area

[0001] The present invention relates to the field of mechanical watchmaking and concerns, more particularly, a watch module with an oscillator-escapement system arranged for greater compactness.

[0002] We often seek to reduce the thickness of components of a watch movement, for example for aesthetic reasons. There is also a constant desire to increase the efficiency of watch movements and reduce the wear of the components constituting the mechanical movement.

[0003] Mechanical watch movements comprise a motor member providing the driving energy, a transmission member, a maintenance - counting member and a regulating member.

[0004] In general, the member providing the driving energy is a barrel which acts as an energy accumulator and energy reserve: it is either armed by the user or by an oscillating mass and gradually restores the energy that 'he stored. The transmission member is most of the time a train of cogs which transmits energy to the exhaust pinion. The regulating organ or regulating organ is an oscillating organ generally in the form of a balance-spring assembly. The maintenance and counting element is an escapement which maintains and counts the oscillations of the balance wheel. It receives energy from the barrel via the escapement pinion and lets out a quantity of this energy to return it to the regulating organ.

State of the art

[0005] In the oscillator-escapement system, the oscillator member and the escapement member respectively have an escapement axis of the escapement wheel and an oscillator axis, which axes are parallel to each other. The center distance, namely the distance separating the escapement axis from the oscillator axis, varies depending on the type and geometry of the watch movement and the oscillator.

[0006] There are also oscillator-escapement systems with a cage tourbillon. In this case, the cage adds a component to the inertia of the oscillator-escapement system, and it contributes significantly to the bulk of the watch movement in the different dimensions.

Brief summary of the invention

[0007] An aim of the invention is to provide a watch module with an oscillator-escapement system which is compact, in particular with a small thickness, for a watch movement.

Another aim of the invention is to provide a watch module with an oscillator-escapement system having low inertia and improved efficiency.

[0009] An aim of the present invention is to propose a watch module with an oscillator-escapement system free from the limitations of known watch modules.

[0010] According to the invention, these goals are achieved in particular by means of a watch module comprising an escapement member, an oscillator member and a frame, said escapement member comprising an escapement mobile mounted rotatably around an escapement axis via a single exhaust pivot connection between the escapement wheel and the frame, said oscillator member comprising a balance-spring assembly rotatably mounted around an oscillator axis via a single oscillator pivot connection between said balance-spring assembly and the frame, in which said escapement axis and said oscillator axis are coaxial, and in which said escapement pivot connection and said oscillator pivot connection have at least one common plane orthogonal to the escapement axis and the oscillator axis.

[0011] This solution has the particular advantage over the prior art of offering a much more compact oscillator-escapement system.

[0012] On the one hand the oscillator-escapement system is of the single-axis type since said escapement axis and said oscillator axis are coaxial and on the other hand the oscillator-escapement system has a reduced number of connections. Thus, said escapement axis and said oscillator axis coincide. In addition, the escapement mobile is rotatably mounted around the escapement axis by means of a single escapement pivot connection and since said balance-spring assembly is rotatably mounted around the oscillator axis via a single oscillator pivot link, we have a reduced number of parts, which makes it possible to reduce the loss of efficiency.

[0013] Also, compactness is improved by the fact that said exhaust pivot connection and said oscillator pivot connection have at least one common plane orthogonal to the escapement axis and the oscillator axis. In other words, there is an overlap between the spatial extent in height of the exhaust pivot link and the spatial extent in height of the oscillator pivot link. For example, said exhaust pivot link and said oscillator pivot link are placed around or within each other. Thus, said exhaust pivot connection can surround the oscillator pivot connection or else said oscillator pivot connection can surround said exhaust pivot connection. When said exhaust pivot connection surrounds the oscillator pivot connection (or vice versa), this can be over the entire height of the oscillator pivot connection or the exhaust pivot connection, or only over a portion of the height of the connection oscillator pivot or the exhaust pivot link.

[0014] According to a possible implementation, said exhaust pivot connection and said oscillator pivot connection are concentric.

[0015] According to a possible implementation, said oscillator pivot connection and said exhaust pivot connection belong to a double bearing. In this case, each bearing of the double bearing is on the one hand concentric with the other of the bearings of the double bearing and on the other hand placed in or around the other of the bearings of the double bearing. These are not bearings placed one on top of the other but two bearings placed one inside the other. This solution does not exclude that the double bearing belongs to a bearing with more than two bearings, in particular three, four or more bearings.

[0016] According to a possible implementation, said double bearing is a ball bearing bearing having at least three concentric cages, each pair of neighboring cages retaining a row of balls allowing the rotation of each cage of said pair relative to the other cage of said pair. Thus, each pair of neighboring cages forms a bearing, and is located either around or in another cage, over all or part of the height of the cages of the ball bearing bearing. It is therefore possible to use a ball bearing bearing having three concentric cages, or more than three concentric cages, in particular four cages or five cages. It is possible to use a ball bearing having ceramic balls, and thus have a bearing without lubrication and with low friction.

Other implementations of this double bearing are possible, for example a drilled bearing with dry friction, or even a bearing with ruby cages where the friction between each cage is of the nano lubricated dry type.

[0018] The present invention also relates to a watch movement comprising a watch module as described and exposed in the present patent application. Such a watch movement notably further comprises a bridge or a plate.

[0019] The present invention also relates to a watch comprising a watch case and a bracelet, said watch case comprising a watch movement as described and exposed in the present patent application. Such a watch may be a chronograph watch, or any other type of watch. Also, said watch movement can belong to any timepiece, in particular a clock. Also, said watch movement may belong to a writing instrument or any other device capable of containing a watch movement.

Brief description of the figures

[0020] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which: – Figure 1 is a kinematic diagram of a first variant of a first embodiment of a module watchmaker with an oscillator-escapement system according to the invention, - Figures 2 to 4 are views respectively in perspective from above, in top view and in cross section of a watch module with an oscillator-escapement system, according to said first variant of the first embodiment, Figure 3 is a view from direction III of Figure 4 and Figure 4 is a sectional view from direction IV-IV of Figure 3, – Figure 5 is a kinematic diagram of a second variant of a first embodiment of a watch module with an oscillator-escapement system according to the invention, – Figures 6 to 8 are views respectively in perspective from above, in perspective from below and in cross section of a watch module with an oscillator-escapement system, according to said second variant of the first embodiment, Figure 6 is a view from direction VI of Figure 8 and Figure 7 is a sectional view from the direction VII of Figure 8, – Figure 9 is a kinematic diagram of a third variant of a first embodiment of a watch module with an oscillator-escapement system according to the invention, – Figures 10 to 12 are respectively perspective views from above, perspective view from below and in cross section of a watch module with an oscillator-escapement system, according to said third variant of the first embodiment, Figure 10 is a view from the direction X of Figure 12 and Figure 11 is a sectional view from direction according to the invention, and - Figures 14 to 16 are views respectively in perspective from above, in perspective view from below and in cross section of a watch module with an oscillator-escapement system, according to said second mode of embodiment, Figure 14 is a view from direction XIV of Figure 16 and Figure 15 is a sectional view from direction XV of Figure 16.

Example(s) of embodiment of the invention

[0021] We now refer to Figures 1 to 4 representing a first variant of a first embodiment of a watch module 100 with an oscillator-escapement system according to the invention. In the kinematic diagram of Figure 1, we find the exhaust member 20 which comprises the escape wheel 21, the anchor 22, the double plate 23 and the limiting stops 24. We also have the member of escapement 20 connected to the oscillator member 30 by the anchor 22. In the escapement member 20, the escapement wheel 21, comprising the escape wheel 211 superposed with the escape pinion 212, is pivotally mounted around the exhaust pivot connection P2, around point B. In the oscillator member 30, the balance-spring assembly 31, comprising the balance 311 connected to the balance spring 312, is pivotally mounted around the oscillator pivot connection P3, around point B. The anchor 22 also has a pivot connection at the level of its rod, and cooperates through its first end provided with pallets 22c with the escape wheel 211, while the second end of the anchor 22 cooperates through its fork 22b with the pin 23a of the double plate 23 secured to the shaft 32 of the balance 311. The dart 22a ensures its safety function by formal cooperation with the small plate of the double plate 23.

[0022] According to the invention, point A equals point B (A=B, point A and point B are superimposed, therefore merged), which means in particular that the exhaust axis A2 and the axis of oscillator A3 are positioned at the same location and are superimposed and therefore identical. The frame 40 serves as a support for fixing the fixed, non-moving parts of the watch module 100, in this case the support of the shaft of the pivot connection of the anchor 22, and the part surrounding the pivoting shaft of the oscillator pivot connection P3 (this is an intermediate cage 53 of the double ball bearing visible in Figure 4).

[0023] In Figures 2 to 4, we find the elements which have just been described in relation to Figure 1, in a hardware arrangement of the watch module 100 now specified. In the representation of Figure 2, the bottom of the watch module 100 is made up of the frame 40. On the left in Figure 2 or 4, we see the shaft of the pivot connection of the anchor 22, mounted on the frame 40. On the right in Figure 2 or 4, the exhaust member 20 and the oscillator member 30 are stacked one on top of the other, with the exhaust member 20 between the frame 40 and the oscillator member. 30. A central shaft 32 forms the central element of the oscillator pivot link P3. This central shaft 32 is centered on and parallel to the oscillator A3 and exhaust A2 axes. In its end portion opposite the frame 40 (at the top in Figure 4), the central shaft 32 is the support for the balance 311 (the center of the balance is pivotally mounted on the central shaft 32). Below the balance 311, the ferrule of the spiral spring 312 is driven onto the central shaft 32. Below the spiral spring 312, the double plate 23 is driven onto the central shaft 32. Below the double plate 23, the another end portion of the central shaft 32 is driven into the internal cage 51 of the ball bearing 50.

[0024] The ball bearing bearing 50 comprises three cages: an internal cage 51, an external cage 52 and an intermediate cage 53. The intermediate cage 53 is fixedly mounted on the frame 40 and the external cage 52 carries the mobile of exhaust 21, with the pinion 212 surmounted by the escape wheel 211 whose teeth cooperate with the pallets 22c of the anchor 22. The anchor 22 is of the counterweight rod type, the fork 22b cooperating with the pin 23a of the double plate 23. Limiting stops 24 serve to limit the movement of the anchor 22 on either side of the anchor rod (see Figure 2).

We see in Figure 4 that the height extent H3 of the oscillator pivot connection P3 shares a portion of the height extent H2 of the exhaust pivot connection P2: in this portion of common height we have placed in Figure 2 a plane P1 common to the oscillator pivot connection P3 and to the exhaust pivot connection P2. This common plane P1 is orthogonal to the escapement axis A2 and to the oscillator axis A3. There are in reality a multitude of possible P1 plans, parallel to each other. These planes P1 intersect with the ball bearing bearing 50. Each of these planes P1 is parallel to the average plane of this ball bearing bearing 50, and passes into the ball bearing bearing 50. All of these planes P1 belonging to the entire extent of the height of this ball bearing bearing 50,.

[0026] We now refer to Figures 5 to 8 representing a second variant of a first embodiment of a watch module 100 with an oscillator-escapement system according to the invention. Unless otherwise stated, the information previously described in relation to the first variant remains valid. In particular, as seen in Figure 5, the kinematic diagram is very close to that of the first variant, shown in Figure 1. A difference lies in the fact that in said exhaust pivot connection P2, the mobile d The exhaust 21 is integral with the central part of the exhaust pivot P2 through which the exhaust axis A2 passes. Another difference lies in the fact that it is not the part surrounding the pivoting shaft of the oscillator pivot connection P3 which is fixed on the frame 40 but the part surrounding the pivoting shaft of the exhaust pivot connection P2 ( this is an external cage 52 of the double ball bearing visible in Figures 7 and 8).

[0027] In Figures 6 to 8, we find the elements which have just been described in relation to Figure 5, in a hardware arrangement of the watch module 100 now specified. In the representation of Figure 6, the frame 40 does not form the bottom of the watch module 100 but it is the escapement mobile 21 and in particular the escape pinion 212, which forms the bottom of the watch module 100. The frame 40 is arranged between the oscillator member 30 and the escapement mobile 21. The frame 40 is a plate which has an opening in which the double bearing 50 with ball bearings is housed. The internal cage 51 is movable and is integral with the lower end portion of the central shaft 32. Above the double bearing 50 with ball bearings, this central shaft 32 is integral with the ferrule retaining one end of the hairspring 312 and it is surrounded by this ferrule. Above the balance spring 312, this central shaft 32 is integral with the double plate 23 and it is surrounded by this double plate 23. Above the double plate 23, this central shaft 32 is integral with the balance 311 and it is surrounded by this balance wheel 311. The intermediate cage 53 is movable relative to the external cage 52 and relative to the internal cage 51. The intermediate cage 53 is integral with the escape wheel 21 (escape wheel 211 and escape pinion 212) located under the frame 40. The external cage 52 is integral with the frame 40.

[0028] In this case, the anchor 22 is stepped and passes through an opening in the frame 40. This means that the frame 40 has an opening 41 through which the anchor 22 passes so that the fork 22b of the anchor is located on one side of the frame 40 and that the pallets 22c are located on the other side of the frame 40. To allow the anchor 22 to pivot relative to the frame 40, another pivot connection is formed, here materialized ( see Figures 6 to 8) by a ball bearing 42. Thus, as seen in Figures 7 and 8, the pallets 22c are located under the frame 40 and cooperate with the teeth of the escape wheel 211. As seen in Figures 6 and 8, the fork 22b and the dart 22a are located above the frame 40, between the balance spring 312 and the large plate of the double plate 23, and the fork 22b cooperates with the pin 23a of the double plate 23. The limitation stops 24 of the anchor 22 are visible in Figures 7 and 8.

As seen in Figures 5 to 8, the double plate 23 of the oscillator member 30 is coaxial with said oscillator axis A3 and is inserted between the balance 311 and the hairspring 312.

[0030] Also, the height extent H3 of the oscillator pivot connection P3 corresponds to the length of the central shaft 32, and shares a portion of the height extent H2 of the exhaust pivot connection P2 corresponding to the height of the intermediate cage 53: in this portion of common height we have placed in Figure 8 a plane P1 common to the oscillator pivot connection P3 and to the exhaust pivot connection P2. This common plane P1 is orthogonal to the escapement axis A2 and to the oscillator axis A3. There are in reality a multitude of possible P1 plans, parallel to each other. These planes P1 are included in the height of the internal cage 51 of the ball bearing 50 and are parallel to the average plane of this ball bearing 50.

[0031] We now refer to Figures 9 to 12 representing a third variant of a first embodiment of a watch module 100 with an oscillator-escapement system according to the invention. Unless otherwise stated, the information described previously in relation to the second variant of the first embodiment remains valid. In particular, as seen in Figure 9, the kinematic diagram is very close to that of the second variant of the first embodiment, shown in Figure 5. A difference lies in the fact that we have a pivot connection additional (point B in Figure 9), between the exhaust pivot connection P2 (point C in Figure 9) and the oscillator pivot connection P3 (point A in Figure 9), which coincide with each other (A=B= VS). Concretely, as seen in Figures 10 to 12, the ball bearing 50 has four cages: the inner cage 51, the outer cage 52, the intermediate cage 53 and an additional intermediate cage 54. The outer cage 52 is secured to the frame 40. The additional intermediate cage 54 is placed between the intermediate cage 53, secured to the escapement mobile 21, and the inner cage 51 secured to the central shaft 23 on which the balance-spring assembly 31 is mounted. This additional intermediate cage 54 is fixed (mounted on the frame 40), the inner cage 51 and the intermediate cage 53 being movable in rotation relative to this additional intermediate cage 54, around the exhaust axis A2 superimposed on the oscillator axis A3. In this way, direct contact is avoided between the movable cage secured to the balance-spring assembly 31 (of the movable part of the oscillator member 30) and the movable cage secured to the escapement wheel 21 (of the movable part of the exhaust member 20). This precaution notably prevents the watch module 100 from being dependent on the inertia of the movement of the balance wheel 311.

[0032] In this case also, as in the second variant of the first embodiment, the anchor 22 is stepped and passes through an opening 41 of the frame 40, with a ball bearing 42 to materialize the pivot connection of the anchor 22.

[0033] The first embodiment of the watch module described above is characterized by a spiral balance assembly which incorporates the traditional components of a balance-spring assembly, arranged compactly in combination with the escapement member.

[0034] We now refer to Figures 13 to 16 representing an implementation of a second embodiment of a watch module 100 with a compact oscillator-escapement system according to the invention.

[0035] In the kinematic diagram of Figure 13, we find the escapement member 20 connected to the oscillator member 30 by the anchor 22. In the escapement member 20, the escapement mobile 21, comprising the escape wheel 211 superimposed with the escape pinion 212, is pivotally mounted around the escape pivot connection P2, around point B. In the oscillator member 30, the balance-spring assembly 31, comprising the balance 311 connected to the balance spring 312, is pivotally mounted around the oscillator pivot connection P3, around point B. point D corresponds to the center of the balance 311. The anchor 22 also has a pivot connection at the level of its rod, and cooperates through its first end provided with pallets 22c with the escape wheel 211, while the second end of the anchor 22 cooperates through its fork 22b with the pin 23a of the double plate 23 secured to the shaft 32 of the balance 311. According to the invention, point A equals point B (A=B, point A and point B are superimposed, therefore merged), which means in particular that the escapement axis A2 and the oscillator axis A3 are positioned in the same location, are superimposed and are identical. In the case of this second embodiment, point A equals point D (A=D, point A and point D are superimposed, therefore confused): the balance 311 forms the part surrounding the pivoting shaft of the connection oscillator pivot P3. The frame 40 serves as a support for fixing the fixed, non-moving parts of the watch module 100, in this case the shaft of the pivot connection of the anchor 22, and the part surrounding the pivoting shaft of the oscillator pivot connection P3 (this is an intermediate cage 53 of the double ball bearing visible in Figures 14 and 16).

[0036] In Figures 14 to 16, we find the elements which have just been described in relation to Figure 13, in a hardware arrangement of the watch module 100 now specified. In the representation of Figures 14 to 16, the bottom of the watch module 100 is made up of the balance 311. On the left in Figure 16, we see the shaft of the pivot connection of the anchor 22, mounted on the frame 40, via a ball bearing 42 placed in an opening 41. In the center of the section in Figure 16, the exhaust member 20 and the oscillator member 30 are found stacked one on top of the other, with the member d exhaust 20 above the frame 40 and the oscillator member 30. The frame 40 and the oscillator member 30 are nested one inside the other as explained below.

[0037] The central element of the exhaust pivot connection P2 comprises the hub of the exhaust wheel 21, which supports the exhaust pinion 212 and the escape wheel 211. The exhaust pinion 212 corresponds to the upper element of the stack formed of the escapement member 20 and the oscillator member 30, and the upper element of the watch module 100, at the top of Figure 16. The hub of the escapement mobile 21 is housed in the opening of the internal cage 51 of the ball bearing 50, so that the escapement mobile 21 pivots with this internal cage 51. The intermediate cage 53 is fixed and belongs to the frame 40 of the watch module 100.

The central element of the oscillator pivot connection P3 comprises the double plate 23, in the center of the bottom of the watch module 100, surmounted by the hairspring 312. The hairspring 312 is thus located between the double plate 23 and the bearing 50 , under the internal cage 51 and the intermediate cage 53. The large plate of the double plate 23 is extended radially by two arms up to the balance 311, the serge 311a or peripheral ring of which is made up of the external cage 52 of the bearing 50. This bearing 50 comprising three cages, namely the aforementioned mobile internal cage 51, the aforementioned fixed intermediate cage 53 and the mobile external cage 52. We therefore do not have a central shaft 32 as in the case of the first embodiment.

The intermediate cage 53 is fixedly mounted on the frame 40, and has an opening 41 retaining the ball bearing 42 of the anchor as in the second and third variants of the first embodiment. Above the ball bearing 50 (figure 14 and 16), the two arms of the anchor 22 carry the pallets 22c which cooperate with the teeth of the escape wheel 211. The travel of the bearings is limited by two limitation stops 24 (see Figures 14 and 16). Below the ball bearing 50 (figure 15 and 16), the fork 22b cooperates with the plate pin 23a of the double plate 23.

[0040] We see that the height extent H3 of the oscillator pivot connection P3 corresponds to the height of the rim 311a of the balance, namely the height of the external cage 52 of the bearing 50. The height H2 of the pivot connection d exhaust P2 corresponding to the height of the internal cage 51 of the bearing 50. We see in Figure 16 that the height extent H3 of the oscillator pivot connection P3 shares a portion of the height extent H2 of the pivot connection d exhaust P2: in this portion of common height we have placed in Figure 16 a plane P1 common to the oscillator pivot connection P3 and to the exhaust pivot connection P2. This common plane P1 is orthogonal to the escapement axis A2 and to the oscillator axis A3. There are in reality a multitude of possible P1 plans, parallel to each other. These planes P1 are intersecting with the ball bearing bearing 50 and parallel to the average plane of this ball bearing bearing 50.

[0041] In this case also, as in the second variant and the third variant of the first embodiment, the anchor 22 is stepped and passes through an opening 41 of the frame 40, with a ball bearing 42 to materialize the connection anchor pivot 22.

[0042] With this second embodiment of the watch module 100, we obtain an extra flat arrangement.

[0043] The second embodiment of the watch module described above is characterized in particular by the fact that one of the cages of the ball bearing bearing forms the rim 311a of the balance of the balance-spring assembly (31. In the example described and illustrated in Figures 13 to 16, it is the outer cage 52, of the set of three cages 51, 52, 53 of the double ball bearing 50, which forms the rim 311a of the balance of the balance assembly spiral 31. This arrangement further improves the compact nature of the watch module 100 thus obtained.

[0044] In the embodiments presented here, the escapement member 20 is a modified and compacted Swiss anchor escapement, in which said anchor 22 is an inverted rod anchor. According to a possible implementation, in a more general manner, said exhaust member 20 is a free exhaust, comprising an escape wheel 211, an anchor 22, a double plate 23 and limitation stops 24 for the travel of the anchor 22.

[0045] In the embodiments presented here, the double bearing 50 making it possible to compact the escapement members 20 and oscillator 30 of the watch module 100 is a ball bearing bearing 50 having at least three concentric cages (three cages 51, 52, 53 in the first and second variants of the first embodiment and in the second embodiment or four concentric cages 51, 52, 53 and 54 in the third variant of the first embodiment), each pair of neighboring cages retaining a row of balls allowing the rotation of each cage of said pair relative to the other cage of said pair, and one cage out of two, namely one cage of each pair of cages, is fixed on the frame 40. In particular, among said at least three concentric cages (51, 52, 53), a first pair of neighboring cages and the corresponding row of balls form said exhaust pivot connection (P2) around the exhaust axis A2. Also, among said at least three concentric cages (51, 52, 53), a second pair of neighboring cages and the corresponding row of balls form said oscillator pivot connection (P3) around the oscillator axis A3.

[0046] In the embodiments presented here, the escapement pinion 212 forms, in a traditional manner, the input part of the watch module 100. In the case of the second variant and the third variant of the first embodiment and in the case of the second embodiment, the escapement pinion 212 is arranged outside the watch module 100, namely as a part projecting from one of the faces of the stack of parts forming the watch module 100 .

[0047] It is understood that the present invention provides a solution in which said exhaust member and said oscillator member are strongly mechanically linked to each other and strongly geometrically close to each other, see nested together. one into the other, which not only reduces bulk, but also minimizes the number of connections, friction and therefore energy losses.

[0048] The test results for an oscillator-escapement system according to the invention have shown that this solution provides a gain of around 3% for the power reserve, which corresponds to an efficiency gain of 3%.

[0049] Thanks to the arrangement which is the subject of the present invention, we propose a watch module with an oscillator-escapement system that is economical and easy to manufacture. Such a watch module can be implemented as a module in a watch movement comprising at least one bridge and a plate and other elements such as, in a non-limiting manner, the motor member (in particular a barrel) and the transmission member (the cog train), and possibly the winding and/or time setting mechanism.

Reference signs used in the figures

[0050] 100 Watchmaking module P1 Common plan 20 Escapement member 21 Exhaust mobile 211 Escape wheel 212 Exhaust pinion 22 Anchor 22a Dart 22b Fork 22c Pallet 23 Double plate 23a Ankle 24 Limiting stops A2 Escapement axis (A2) P2 Height escapement pivot connection H2 30 Oscillator member 31 Balance-spring assembly 311 Balance 311a Serge 312 Hairspring 32 Solid central shaft A3 Oscillator axis P3 Height oscillator pivot connection H3 D Balance center 40 Frame 41 Opening 42 Bearing for the anchor (ball bearing) 50 Double bearing (ball bearing) 51 Inner cage 52 Outer cage 53 Intermediate cage 54 Additional intermediate cage

Claims (13)

1. Watch module (100) comprising an escapement member (20), an oscillator member (30) and a frame (40), said escapement member (20) comprising an escapement mobile (21) rotatably mounted around of an escapement axis (A2) via a single exhaust pivot connection (P2) between the escapement wheel (21) and the frame (40), said oscillator member (30) comprising a balance-spring assembly ( 31) rotatably mounted around an oscillator axis (A3) via a single oscillator pivot connection (P3) between said balance-spring assembly (31) and the frame (40), in which said escapement axis ( A2) and said oscillator axis (A3) are coaxial, and in which said exhaust pivot connection (P2) and said oscillator pivot connection (P3) have at least one common plane (P1) orthogonal to the escapement axis (A2) and to the oscillator axis (A3). 2. Watch module (100) according to claim 1, wherein said exhaust pivot connection (P2) and said oscillator pivot connection (P3) are concentric. 3. Watch module (100) according to claim 1 or 2, said oscillator member (30) comprising a central shaft (32) integral with the balance-spring assembly (31) and coaxial with said escapement axis (A2) and said oscillator axis (A3). 4. Watch module (100) according to one of claims 1 to 3, wherein said oscillator pivot link (P3) and said exhaust pivot link (P2) belong to a double bearing (50). 5. Watch module (100) according to the preceding claim, wherein said double bearing is a ball bearing bearing (50) having at least three concentric cages (51, 52, 53), each pair of neighboring cages retaining a row of balls allowing the rotation of each cage of said pair relative to the other cage of said pair. 6. Watch module (100) according to the preceding claim, in which, among said at least three concentric cages (51, 52, 53), said first pair of neighboring cages and the corresponding row of balls forming said exhaust pivot connection (P2). 7. Watch module (100) according to claim 5 or 6, in which, among said at least three concentric cages (51, 52, 53), a said second pair of neighboring cages and the corresponding row of balls form said pivot connection d oscillator (P3). 8. Watch module (100) according to one of claims 5 to 7, in which one of the cages of the ball bearing bearing forms the rim (311a) of the balance of the balance-spring assembly (31). 9. Watch module (100) according to one of claims 1 to 8, wherein said escapement member (20) is a free escapement, comprising an escape wheel (211), an anchor (22), a double plate (23) and limiting stops (24) for the movement of the anchor (22). 10. Watch module (100) according to the preceding claim, in which the frame (40) comprises an opening (41) through which the anchor (22) passes so that the fork of the anchor is located on one side of the frame (40) and that the pallets are located on the other side of the frame (40). 11. Watch module (100) according to the preceding claim, in which the double plate (23) of the oscillator member (30) is coaxial with said oscillator axis (A3) and interposed between the balance (311) and the hairspring (312). ). 12. Watch movement comprising the watch module (100) according to one of claims 1 to 11. 13. Watch comprising a watch case and a bracelet, said watch case comprising a watch movement according to claim 12.