Diaphragm expansion device, especially for watches

Abstract

The invention relates to a diaphragm-type deployment device, in particular for a timepiece, comprising a first rigid armature and a second deformable armature, the first rigid armature and the second deformable armature being connected to each other so that the second deformable armature changes from a first extended configuration to a second compact configuration and vice versa, the device defining a first geometric shape when the second deformable armature is in the first extended configuration, and a second geometric shape smaller than the first geometric shape when the second deformable armature is in the second compact configuration, the device extending substantially in the same plane when the second armature is in the first or second configuration, characterized in that the second deformable armature comprises first deformable parts and rigid parts assembled alternately, the first deformable part connecting the rigid part to the following rigid part. The invention also relates to a timepiece comprising such a display device.

Description

Technical Field

[0001] The invention relates to a membrane-type unfolding device, in particular for a timepiece.

[0002] The invention also relates to a timepiece comprising such a deployment device. Background Art

[0003] A diaphragm deployment device is an element having an armature that can be changed from a compact configuration (wherein the device has a small volume or geometry) to an extended configuration (wherein the device has a larger volume or geometry).

[0004] These devices are frequently used in timepieces, in particular in display devices or in devices for driving or even for locking the axis of rotation of a wheel.

[0005] In a display device, they can be used as a removable screen to hide part or all of the information displayed by the display device. In the compact configuration, the information is not covered so as to be visible, for example, to the wearer of a watch including the display device, while in the extended position, the device covers the information.

[0006] Examples of display devices are shown in documents CH46061, CH711228, DE29521914, DE1985554 or EP1842112.

[0007] In another example of application, document EP3671370 shows a deployment device for coupling two overlapping rotating elements. In a compact configuration, the two elements are coupled by a deployment device in contact with the two elements so that one of the elements rotates the other. In an extended configuration, the two elements are disentangled so that the rotation of one element does not drive the rotation of the other element.

[0008] Other applications are possible, for example in a system for locking the rotation of a balance wheel of a regulator mechanism. In the extended configuration, the deployment device actuates the locking lever of the balance wheel, while in the compact configuration the lever is no longer actuated so as to put the balance wheel in motion.

[0009] Yet, the actuation of this membrane type unfolding device is difficult, because it needs complicated hinges just can act on the device and make it change configuration.In fact, they are formed by a large number of elements connected by hinges, particularly forming a pivot between the parts.

[0010] However, these hinges make the device slow to actuate when it is desired to change from one configuration to another. Summary of the invention

[0011] The object of the present invention is to remedy the above-mentioned drawbacks and to provide a membrane-type deployment device, the actuation of which is simple and rapid.

[0012] To this end, the present invention relates to a diaphragm-type expansion device, in particular for a watch, comprising a first rigid armature and a second deformable armature, the first rigid armature and the second deformable armature being connected to each other so that the second deformable armature changes from a first extended configuration to a second compact configuration and vice versa, the device defining a first geometric shape when the second armature is in the first extended configuration, and defining a second geometric shape smaller than the first geometric shape when the second armature is in the second compact configuration, the device extending substantially in the same plane when the second armature is in the first or second configuration.

[0013] The deployment device is noteworthy in that the second deformable armature comprises a first deformable portion and a rigid portion that are alternately assembled, the first deformable portion connecting the rigid portion to the next rigid portion.

[0014] Thus, the device is easy to use due to the combination of a deformable part and a rigid part, since the rigid part can be moved to actuate the device more quickly. In fact, the action is then directly exerted on the deformable armature, which can effectively extend or compress. In addition, this combination makes it possible to use a deformable part (such as a flexible strip) by keeping the device rigid enough for applications requiring resistance to bending (for example, in a locking system).

[0015] According to a particular embodiment of the invention, the entire first rigid armature and the entire second deformable armature form a first one-piece assembly.

[0016] According to a particular embodiment of the invention, the second portion of the first rigid armature and the second portion of the second deformable armature form a second one-piece assembly.

[0017] According to a particular embodiment of the invention, the first component and the second component overlap each other.

[0018] According to a particular embodiment of the invention, the second deformable armature comprises at least two movable baffles, preferably four movable baffles, which are distributed with angular symmetry.

[0019] According to a particular embodiment of the invention, the baffles define a first opening of a first configuration and a second opening of a second configuration.

[0020] According to a particular embodiment of the invention, the material of the device will be selected from silicon, a nickel-phosphorus alloy of the Ni / P type, a steel alloy of the Fe / Ni / Co / Mo type.

[0021] According to a particular embodiment of the invention, the second deformable armature comprises first deformable portions and rigid portions assembled alternately in series.

[0022] According to a particular embodiment of the invention, a first deformable portion connects a rigid portion to a subsequent rigid portion.

[0023] According to a particular embodiment of the invention, the second deformable armature comprises at least one second deformable portion, preferably a plurality of second deformable portions, connecting one or more rigid portions to the first rigid armature.

[0024] According to a particular embodiment of the invention, the second deformable portion connects one of the two rigid portions to the first rigid armature.

[0025] According to a particular embodiment of the invention, the rigid portion connected to the first rigid armature has a different shape than the other rigid portions.

[0026] According to a particular embodiment of the invention, each deformable portion comprises a flexible strip connecting, by its ends, two rigid portions or a rigid portion and a first rigid armature.

[0027] According to a particular embodiment of the invention, the device comprises means for moving at least one rigid portion, preferably a plurality of rigid portions, in order to change the second armature from the extended configuration to the compact configuration and vice versa.

[0028] According to a particular embodiment of the invention, the rigid part(s) moved by the movement means are rigid parts connected to the first rigid armature.

[0029] According to a particular embodiment of the invention, the rigid part(s) moved by the movement means are rigid parts which are not connected to the first rigid armature.

[0030] According to a particular embodiment of the invention, the movement means are configured to generate a substantially rectilinear movement of the rigid portion(s).

[0031] According to a particular embodiment of the invention, the movement means are configured to generate a rotational movement of the rigid part(s).

[0032] According to a particular embodiment of the invention, the rigid portion connected to the first rigid armature undergoes a rotational movement about a pivot point when the second armature changes from the extended configuration to the compact configuration and vice versa.

[0033] According to a particular embodiment of the invention, the second deformable armature delimits an outer periphery of the diaphragm, the first rigid armature being arranged inside said periphery.

[0034] According to a particular embodiment of the invention, the first rigid armature delimits the outer periphery of the diaphragm and the second armature is arranged inside said periphery.

[0035] According to a specific embodiment of the invention, the first geometry defines a first opening when the second deformable armature is in the first extended configuration, and the second geometry defines a second opening when the second deformable armature is in the second compact configuration, the first opening being narrower than the second opening.

[0036] According to a particular embodiment of the invention, each shutter is arranged on a different rigid portion than the second deformable armature.

[0037] According to a specific embodiment of the invention, the first geometric shape defines a first perimeter when the second deformable armature is in the first extended configuration, and the second geometric shape defines a second perimeter when the second deformable armature is in the second compact configuration, the first perimeter being larger than the second perimeter.

[0038] According to a particular embodiment of the invention, the second deformable armature comprises at least one sabot, preferably four sabots, for delimiting a variable perimeter of the device, each sabot being arranged on a different rigid portion than the second deformable armature.

[0039] According to a particular embodiment of the invention, the diaphragm forms a cam, the geometry of which is variable.

[0040] The invention also relates to a timepiece movement comprising such a deployment device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Other specific features and advantages will become clearly apparent from the following description given below, by way of indicative and non-limiting examples, with reference to the accompanying drawings, in which:

[0042] Figure 1 is a schematic representation of a membrane deployment device without a baffle according to a first embodiment of the present invention;

[0043] Figure 2 is a schematic representation of a membrane deployment device of a first embodiment of the present invention with a baffle and in a compact configuration;

[0044] Figure 3 is a schematic representation of a membrane deployment device of a first embodiment of the present invention with a baffle and in an intermediate configuration;

[0045] Figure 4 is a schematic representation of a membrane deployment device of a first embodiment of the present invention with a baffle and in an extended configuration;

[0046] Figure 5 is a schematic representation of a membrane-type deployment device of a first embodiment of the invention, applied to a system for locking a balance arbour;

[0047] Figure 6is a schematic representation of a membrane deployment device according to a second embodiment of the present invention;

[0048] Figure 7 is a schematic representation of the separation of a membrane-type deployment device according to a second embodiment of the present invention;

[0049] Figure 8 is a schematic representation of a layer of a membrane-type unfolding device according to a second embodiment of the present invention;

[0050] Fig. 9 is a schematic representation of a membrane deployment device of a second embodiment of the present invention in a compact configuration;

[0051] Fig.10 is a schematic representation of a membrane deployment device of a second embodiment of the present invention in an intermediate configuration;

[0052] Fig.11 is a schematic representation of a membrane deployment device of a second embodiment of the present invention in an extended configuration;

[0053] Fig.12 is a schematic representation of a membrane deployment device according to a third embodiment of the present invention;

[0054] Fig.13 is a schematic representation of a membrane deployment device of a third embodiment of the present invention in a compact configuration; and

[0055] Fig.14 is a schematic representation of a membrane deployment device of a third embodiment of the present invention in an extended configuration. DETAILED DESCRIPTION

[0056] The invention relates to a membrane-type expansion device 1, 10, 20, in particular for a timepiece. In the following embodiments, the membrane-type expansion device is, for example, a display device of a timepiece, for example in a timepiece movement of a watch.

[0057] The deployment device comprises a first rigid armature 2 and a second deformable armature 3. Rigid means that the armature is not designed to be flexible in normal use of the device 1,10,20, whereas the deformable armature is designed to deform during use of the device 1,10,20.

[0058] The first rigid armature 2 comprises a square frame 4, each side being formed, for example, by an arm. The frame 4 defines an inner space in which the second deformable armature 3 is arranged. Thus, the first rigid armature 2 defines the outer perimeter of the device 1, while the second flexible armature 3 is arranged inside said perimeter.

[0059] Due to its flexibility, the second deformable armature 3 can be changed from a first, extended configuration to a second, compact configuration.When the second deformable armature 3 is in the first or second configuration, the device 1 extends substantially in the same plane.

[0060] The second deformable armature 3 has an arrangement comprising flexible portions 7, 8 and rigid portions 5, 6. The flexible portions 7, 8 connect the rigid portions 5, 6 together or connect the rigid portions 5, 6 to the first rigid armature 2.

[0061] Each flexible part 7, 8 comprises a flexible strip connected either by one end to the first rigid armature 2 and by the other end to the rigid part 5, 6, or to both rigid parts 5, 6 (each by one end). The flexible strip preferably has a longitudinally elongated rectilinear shape.

[0062] The rigid parts are rigid arms 5, 6 which can be straight pieces 6 or form U-shaped pieces.

[0063] According to the present invention, Figures 1 to 5 In the embodiment of the invention, the second deformable armature 3 comprises rigid arms and flexible strips connected alternately in series. More specifically, the deformable armature comprises a group connected in series, the group comprising a U-shaped rigid arm 5, a first straight flexible strip 7, a straight rigid arm 6 and a second flexible strip 7 connected in series. The free ends of the flexible strip 7 are connected at the free ends of the rigid arms 5 and 6. The flexible strip 7 and the straight arm 6 are substantially collinear, and the U-shaped piece is arranged in the plane of the second flexible armature perpendicular to the strip. The ends of the arms of the U-shaped piece are arranged at the ends of the flexible strip 7, and their bases are substantially parallel to the straight rigid arms 6. The inner side of the U-shaped piece is oriented toward the first rigid armature 2. The first rigid armature 2 comprises a buckle 9 extending from each side toward the inner side of each U-shaped piece of the second deformable armature 3.

[0064] Thus, the second deformable armature 3 comprises four groups placed in series to form a square within the frame 4 of the first rigid armature 2, each group extending into the space of the frame 4 along one side of the frame 4. The groups are perpendicular to each other. Each assembly comprises a rigid U-shaped arm, a first flexible strip 7, a straight rigid arm 6 and a second flexible strip 7.

[0065] The second deformable armature 3 is connected to the first rigid armature 2 by third flexible strips 8 arranged in extension of the catch 9, each flexible strip 8 connecting an end of the catch 9 to the base of the U-shaped piece by penetrating into the space defined by the U-shaped piece.

[0066] Thus, the first rigid armature 2 and the second deformable armature 3 are coupled to each other by anchoring points defined at the ends of each clasp. These anchoring points locally define axes of rotation about which the deformable armature can rotate when it is deformed.

[0067] The device 1 comprises a baffle 11 arranged on each U-shaped rigid portion 5, preferably supported by the base of the U. The baffle 11 extends towards the centre of the device 1 to define an opening. Figures 1 to 4 The embodiment of the invention comprises two pairs of opposing baffles 11 arranged perpendicularly to each other. Each baffle 11 is arranged on the base of the U-shaped member. The baffle has an elongated shape, with its free end moved away and the rounded edge of the hook shaped oriented towards the center of the device 1. The two opposing baffles 11 are substantially symmetrical about the center of the device 1. These baffles are arranged according to the angle between the two baffles. The distribution is angularly symmetrical, where ; where n is the number of baffles.

[0068] Each baffle 11 covers or is partially covered by an adjacent baffle 11. Thus, the circular edges of the baffles form a substantially circular opening depending on the arrangement of the baffles relative to each other.

[0069] Preferably, the first rigid armature 2 and the second deformable armature 3 at least partially form a one-piece component. Here, the entire first rigid armature 2 and the entire second deformable armature 3 form a one-piece component. The two armatures form a single continuous part in one piece.

[0070] Preferably, the two armatures are made of the same material. The material of the device 1 will for example be chosen from silicon, a nickel-phosphorus alloy of the Ni / P type, or a steel alloy of the Fe / Ni / Co / Mo type.

[0071] Therefore, the two armatures 2, 3 are manufactured in the same method to save time and reduce manufacturing costs. Optionally, the baffle is also formed in one piece with the two armatures 2, 3 of the same material.

[0072] For silicon, the device 1 is preferably manufactured by a DRIE (Deep Reactive Ion Etching) type method.

[0073] Conventional LIGA type photolithography is used to form the device 1 made of a nickel phosphorus alloy or a steel alloy.

[0074] The device 1 comprises movement means, not shown in the figures, configured to change the second deformable armature 3 from the compact configuration to the extended configuration and vice versa. These movement means can also be made of flexible elements.

[0075] To this end, the displacement means exert a displacement on at least one rigid portion of the second deformable armature 3 .

[0076] Preferably, in this embodiment, the movement is exerted on the rectilinear rigid arms 6. Preferably, the movement means exert a force on a plurality of rectilinear rigid arms 6 of the second deformable armature 3.

[0077] The moving means comprise for example a control lever connected by a rod arranged through an opening in the rectilinear rigid arm 6. By actuating the control lever, the rod pulls or pushes the rectilinear rigid arm 6.

[0078] The movement means are configured to produce a substantially rectilinear movement of the rectilinear rigid portion(s) of the second set 6. Preferably, this movement is performed in the longitudinal direction of the rectilinear arm 6.

[0079] By moving these rigid parts, the U-shaped rigid parts 5 are also moved by means of the flexible strips 7 connecting them to the rectilinear rigid arms 6 .

[0080] The U-shaped rigid parts 5 perform a rotation about the anchoring point thanks to the flexible strips 8 connecting them to the clasps 9 of the first rigid armature 2. Thus, the flap 11 moves and changes position depending on the configuration of the device 1.

[0081] When the second deformable armature 3 is in the first, extended configuration, the device 1 defines a first opening, and when the second deformable armature 3 is in the second, compact configuration, the device defines a second opening. The first opening is narrower than the second opening.

[0082] like Figure 2 As shown in FIG. 1 , the second deformable armature 3 is in a compact position so that the shutter 11 moves apart to form a wide opening. The straight rigid portion 6 is longitudinally adjacent to the first rigid armature.

[0083] exist Figure 3 In the embodiment, the second deformable armature 3 is in the intermediate position and the straight rigid portions 6 have been moved longitudinally so that they are moved away from the first rigid armature 2. Thus, the opening of the device is narrower than Figure 1 The opening of the device 1.

[0084] In addition, Figure 4 In the embodiment in which the second deformable armature 3 is in the extended position, the rectilinear rigid portion 6 is longitudinally moved even more away from the first rigid armature 2. Thus, an even narrower opening is obtained.

[0085] Preferably, the intermediate position is selected as the rest position of the device to be able to change to the extended position or the compact position more quickly. In fact, the movement from the rest position to one of the two other positions is shorter, regardless of whether one of the two positions is selected as the rest position.

[0086] In a particular embodiment, the shutter 11 may overlap and completely close the opening to form a screen without an opening. The device 1 is completely closed in the extended configuration of the second flexible armature 3, for example in the case of a display device 1 where the membrane hides an information item such as date or time.

[0087] Figure 5is an example of the application of the membrane deployment device 1 to a system for locking a tourbillon balance. In the extended position, the bezel 11 is guided towards the inside of the circle to contact the control rod 16 of the stop lever 17 so as to rotate the stop lever 17 together with the stop portion at its end opposite to the control lever 16 about its axis of rotation 18 to contact the cam 20 on the arbour of the balance with hairspring so as to temporarily stop it to reset the time of the watch. The stop lever 17 can temporarily stop the operation of the watch by locking the balance with hairspring at its axis of rotation 18 (for example, contacting the balance stop cam 20 on the arbour of the balance with hairspring 14). The stop lever 17 is held in the rest position, for example, by a spring, which is fixed between the control rod 16 and the axis of rotation 18 on the one hand through the stop lever 17 and on the other hand on the carriage support.

[0088] exist Figures 6 to 9 In the second embodiment of the invention, the rigid armature 12 and the deformable armature 13 are manufactured in two overlapping layers 25, 26, which define a first and a second overlapping assembly. The first layer includes the first part of the rigid armature 12 and the deformable armature 13 and the two baffles 21, while the second layer includes the second part of the rigid armature 12 and the deformable armature 13 and the baffles 21. The two layers have in common a piece of the unfolding device 1, which includes everything between the two fasteners of the rigid armature. In other words, one side of the device is double-copied, and once on each side of the device 10.

[0089] exist Figure 7 and Figure 8 In the embodiment, for the rigid armature 12, the first layer 25 includes one side of the device 10, and the corner of the catch 19 up to the second side, and the third opposite side up to the next catch 19. For the deformable armature 13, the first layer 25 includes elements extending from the half of the U-shaped rigid part 15 corresponding to the second side to the half of the U-shaped rigid part 15 corresponding to the third opposite side. In addition, the first layer 25 includes two baffles 21 extending from each half of the U-shaped rigid part 25.

[0090] The second layer 26 comprises the same configuration rotated 90°, here towards the left. Thus, as for the device 1 of the first embodiment, each layer 25, 26 comprises a whole side, and a quarter side and three quarter side at the two corners of the whole side.

[0091] To form the device 10, two layers 25, 26 are overlapped so that they are in contact with each other. The two layers 25, 26 form a 90° angle between them. Some sides are formed by a single layer, while only one side is formed in both layers 25, 26 at the same time.

[0092] The two superimposed layers 25, 26 form the device 10, which is Figures 1 to 5 The first embodiment of the device 1 is truncated, wherein missing is the section of one side of the rigid armature 12 between the two catches 19, and the section of the deformable armature 13 between the two halves of the U-shaped rigid part 15. Thus, in addition to the two halves of the U-shaped rigid part 15, the corners of the frame, as well as the two flexible strips 17 and the straight rigid part 16 are also missing.

[0093] The operation of the device 10 is the same as that of the device 1 of the first embodiment. The second deformable armature 13 is extended or compressed when the three rectilinear rigid portions 16 move longitudinally. Two opposing rectilinear rigid portions 16 move in opposite directions, while the third rectilinear rigid portion moves vertically in one direction or the other, depending on the desired configuration.

[0094] exist Fig. 9 In the extended configuration, the opening formed by the baffle 21 is wide. The opening is narrower in the middle position of the device 10, such as Fig.10 As shown in Fig.11 In the compact configuration, the opening is narrow.

[0095] Actuation of the device of this embodiment can be performed by means of a pin passing through the two rigid elements 16 of the two layers 25, 26. The pin is actuated for example by a movable control arm comprising an oblong hole in which the pin is inserted.

[0096] The third embodiment of the membrane type deployment device 20 (in Figure 12 to Figure 14 2 (shown in FIG. 2 ) comprises a center in the form of a ring, which is equipped on its outer side with catches 39 distributed angularly around the ring. The deformable armature extends toward the outside around the rigid armature. The second deformable armature 33 delimits the outer periphery of the diaphragm, the first armature 32 being arranged inside said periphery. The device 20 is substantially flat and extends mainly in one plane.

[0097] According to the invention, the second deformable armature 33 comprises rigid parts 35, 36 and flexible parts 37, 38. The second deformable armature 33 comprises first rigid parts 35 and second rigid parts 36 (preferably four each), which are alternately distributed around the ring. The first rigid part 35 has a triangular shape with an outer protrusion and a front protrusion with two opposite top ends. In addition, the second rigid part 36 has an elbow-shaped elongated shape.

[0098] The flexible part includes flexible strips 37, 38 connecting the rigid parts 35, 36 together and a buckle 39 connecting the first rigid part 35 to the central ring. The first flexible strip 38 is arranged in series between the triangular protrusion and the buckle 39, while the second flexible strip 37 is arranged between the other protrusion and the outer end of the elbow-shaped rigid part 36. Finally, the third strip 37 is arranged in series between the other end of the elbow-shaped rigid part 36 and the outer protrusion of the first rigid part 35.

[0099] The device 20 further comprises a plurality of arc-shaped spacers 29 (here 4), each of which is arranged on the triangular rigid portion 35. The spacers 29 are preferably integral with each triangular rigid portion 35 and extend from an outer protrusion of the triangular rigid portion 35. The spacers 29 form a circular periphery of the device, which moves away from the ring when the deformable armature is extended, and which moves closer to the ring when the deformable armature is compacted.

[0100] Each pad 29 comprises a stepping 41 so as to be able to partially overlap the arc of an adjacent pad 29. The pads 29 are more or less overlapped, regardless of the configuration of the device 20, in a compact or extended position. Thus, the pads 29 can move relative to each other while forming a continuous barrier around the device 20, regardless of its configuration. This barrier can come into contact with other elements of the watch movement to trigger or lock the mechanism.

[0101] In the extended position of the device 20 , the spacers form a substantially circular barrier around the axis, whereas in the compact position of the device 20 , the spacers 29 are not aligned with each other while the overlap between adjacent spacers 29 is maintained.

[0102] For this embodiment, the entire first rigid armature 32 and the entire second deformable armature 33 form a one-piece assembly.

[0103] In this embodiment, the movement means are connected to the first rigid parts 35 so as to impart a rotational movement to these first rigid parts about an axis passing through them. The movement means are thus configured to produce a rotational movement of the first rigid parts 35 and thus make it possible to move the spacers 29 apart or closer. The first flexible strip 38 is used to connect the second deformable armature 33 to the first rigid armature 32, and the means are used to return the first rigid part 35 to a position corresponding to the compact configuration.

[0104] The rotation of the first rigid portion 35 induces the spacer to move in one rotational direction toward the outside of the device 20 and in the opposite direction to the inside of the device 20. At the same time, the spacer 29 rotates slightly about itself to change from a first position corresponding to a compact configuration to a second position corresponding to an extended configuration and vice versa.

[0105] Due to the first flexible strip 37, the second rigid portion 36 also rotates about itself following the rotation of the first rigid portion 37. The second rigid portion 36 is used to stiffen the second deformable armature 33.

[0106] Such a device 20 can be used in a system for locking (for example a tourbillon), or in a system for coupling (for example between two superimposed trains). For example, the diaphragm presses against a cam arranged at a distance from the device to trigger the system. In the extended position, the diaphragm moves away and exerts a force against the cam or stud.

[0107] Of course, the invention is not limited to the examples illustrated, but is susceptible to various variations and modifications that will become apparent to a person skilled in the art. Other applications are possible in which the membrane forms, for example, a cam, the geometry of which is variable. The flexible strip may also have the shape of a strip with a flexible neck, or be replaced by a combination of strips that may be cross-shaped or straight, or even by a flexible element.

Claims

1. A diaphragm-type deployment device (1, 10, 20), comprising a first rigid armature (2, 12, 32) and a second deformable armature (3, 13, 33), wherein the first rigid armature (2, 12, 32) and the second deformable armature (3, 13, 33) are connected to each other so that the second deformable armature (3, 13, 33) changes from a first extended configuration to a second compact configuration, and from a second compact configuration to a first extended configuration, when the second deformable armature (3, 13, 33) is in the first extended configuration, the device (1, 10, 20) defines a first geometric shape, and when the second deformable armature (3, 13, 33) is in the second compact configuration, the device defines a second geometric shape that is smaller than the first geometric shape, when the second deformable armature is in the first extended configuration or the second compact configuration, the device (1, 10, 20) extends substantially in the same plane, characterized in that The second deformable armature (3, 13, 33) comprises first deformable parts (7, 17, 37) and rigid parts (5, 6, 15, 16, 35, 36) assembled alternately, the first deformable part connecting the rigid part (5, 6, 15, 16, 35, 36) to the next rigid part (5, 6, 15, 16, 35, 36), and the second deformable armature (3, 13, 33) comprises at least one second deformable part (8, 18, 38) connecting one or more rigid parts to the first rigid armature (2, 12, 32).

2. The device according to claim 1, characterized in that The second deformable portion connects one of the two rigid portions to the first rigid armature (2, 12, 32).

3. The device according to claim 1 or 2, characterized in that: The rigid portion connected to the first rigid armature (2, 12, 32) has a different shape than the other rigid portions (6, 16, 36).

4. The device according to any one of claims 1 to 2, characterized in that Each deformable portion (7, 8, 17, 18, 37, 38) comprises a flexible strip which connects two rigid portions (5, 6, 15, 16, 35, 36) or a rigid portion and the first rigid armature (2, 12, 32) via its ends.

5. The device according to claim 1 or 2, characterized in that: The first rigid armature defines an outer periphery of the diaphragm, and the second deformable armature is arranged inside the outer periphery.

6. The device according to claim 5, characterized in that The first geometry defines a first opening when the second deformable armature is in the first extended configuration, and the second geometry defines a second opening when the second deformable armature is in the second compact configuration, the first opening being narrower than the second opening.

7. The device according to claim 6, characterized in that The second deformable armature (3, 13, 33) comprises at least two movable baffles, which are distributed in an angularly symmetrical manner.

8. Device according to claim 7, each baffle (11, 21) being arranged on a different rigid part than the second deformable armature.

9. The device according to claim 7, characterized in that The baffle (11, 21) defines the first opening in the first extended configuration and the second opening in the second compact configuration.

10. The device according to claim 1 or 2, characterized in that: The second deformable armature defines an outer periphery of the diaphragm, and the first rigid armature is arranged inside the outer periphery.

11. The device according to claim 10, characterized in that The first geometric shape defines a first perimeter when the second deformable armature is in the first extended configuration, and the second geometric shape defines a second perimeter when the second deformable armature is in the second compact configuration, the first perimeter being larger than the second perimeter.

12. The device according to claim 11, characterized in that The second deformable armature comprises at least one spacer (29) for defining a variable perimeter of the device, each spacer (29) being arranged on a different rigid portion than the second deformable armature.

13. The device according to claim 1 or 2, characterized in that It comprises movement means for moving at least one rigid portion so as to change the second deformable armature (3, 13, 33) from the first extended configuration to the second compact configuration and from the second compact configuration to the first extended configuration.

14. The device according to claim 13, characterized in that The rigid part moved by the moving means is a rigid part connected to the first rigid armature.

15. The device according to claim 13, characterized in that The rigid part moved by the moving means is a rigid part which is not connected to the first rigid armature.

16. The device according to claim 13, characterized in that The movement means is configured to produce a substantially linear movement of the rigid portion.

17. The device according to claim 13, characterized in that The movement means is configured to produce a rotational movement of the rigid portion.

18. The device according to claim 13, characterized in that When the second deformable armature (3, 13, 33) changes from the first extended configuration to the second compact configuration and from the second compact configuration to the first extended configuration, the rigid portion connected to the first rigid armature (2, 12, 32) undergoes a rotational movement about a pivot point.

19. The device according to claim 1 or 2, characterized in that At least one first portion of the first rigid armature (2, 12, 32) and at least one first portion of the second deformable armature (3, 13, 33) form a first one-piece assembly made of the same material.

20. The device according to claim 19, characterized in that The entirety of the first rigid armature (2, 12, 32) and the entirety of the second deformable armature (3, 13, 33) form the first one-piece assembly.

21. The device according to claim 20, characterized in that The second portion of the first rigid armature (2, 12, 32) and the second portion of the second deformable armature (3, 13, 33) form a second one-piece assembly.

22. The device according to claim 21, characterized in that The first one-piece component and the second one-piece component overlap each other.

23. The device according to claim 19, wherein the material of the device (1, 10, 20) is selected from silicon, Ni / P type nickel-phosphorus alloy, or Fe / Ni / Co / Mo type steel alloy.

24. The device according to claim 1 or 2, characterized in that The device is used in a timepiece.

25. A timepiece, characterized in that: It comprises a membrane-type unfolding device (1, 10, 20) according to any one of claims 1 to 24.

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