• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of the invention is an oscillating device for a timepiece comprising a mechanism (13) of planar shape comprising first and second rotating inertial members (18, 11) interconnected by a coupling link (32). The coupling link is arranged so that the first and second inertial members always rotate in opposite directions with angular moments in a ratio of 0.9 to 1.1.
    公开号:CH714165B1
    申请号:CH01096/18
    申请日:2018-09-14
    公开日:2021-11-30
    发明作者:Mercier Thomas；Semon Guy；Johannes Benjamin Ypma Wout；Lennard Weeke Sybren
    申请人:Lvmh Swiss Mft Sa；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    The present invention relates to devices for timepieces, as well as to watch movements and to timepieces comprising such devices.
    BACKGROUND OF THE INVENTION
    Devices are known for timepieces comprising a planar mechanism extending in a mean plane, said mechanism comprising:a support,a first inertial member connected to the support by a first elastic suspension arranged so that said first inertial member has an alternating movement substantially in rotation around a first axis of rotation, with a certain kinetic moment LO around the first axis of rotation,a second inertial member connected to the support by a second elastic suspension arranged so that said second inertial member has a reciprocating movement substantially in rotation around a second axis of rotation, with a certain angular momentum LA around the second axis of rotation,a coupling link connecting the first inertial member to the second inertial member.
    [0003] Document EP3032350A1 describes an example of such a device.
    [0004] The object of the present invention is in particular to improve devices of this type, in particular to improve their timing accuracy. In particular, experience shows that devices of the aforementioned type, if they are not very sensitive to shocks and linear accelerations, can be disturbed in their operation by rotational accelerations, and this although the rotational accelerations undergone by such mechanisms are notably weaker than linear accelerations due in particular to shocks. This drawback becomes particularly noticeable when the mechanism operates with a relatively low oscillation frequency, for example less than 50 Hz.
    OBJECTS AND SUMMARY OF THE INVENTION
    To this end, according to the invention, a device of the type in question is characterized in that the coupling link is arranged so that the first inertial member and the second inertial member always rotate in opposite directions and so that a LO / LA angular momentum ratio is between 0.9 and 1.1.
    [0006] Thanks to these arrangements, the disturbances created by the rotational accelerations are limited and the temporal precision of the device is markedly improved.
    In various embodiments of the device according to the invention, one can optionally also have recourse to one and / or the other of the following provisions:LO / LA is between 0.99 and 1.01;the coupling link comprises an elastic branch connecting the first inertial member to the second inertial member;the coupling link is connected to the first inertial member and to the second inertial member respectively at two points arranged on either side of a straight line connecting the first and second axes of rotation in the mean plane;said second inertial member is an anchor adapted to cooperate with an energy distribution member provided with teeth and intended to be requested by an energy storage device, said anchor being controlled by said first inertial member to regularly and alternately block and releasing the energy distribution member, so that said energy distribution member moves step by step under the stress of the energy storage device according to a repetitive movement cycle, and said anchor being adapted to transfer from mechanical energy to said first inertial member during this repetitive motion cycle;said second inertial member comprises a main body adapted to cooperate with the energy distribution member and a link arm which are diametrically opposed with respect to the second axis of rotation, the main body and the link arm respectively having inertial masses diametrically opposed with respect to the second axis of rotation;the device constitutes a monolithic mechanism;the device is designed so that the first and second inertial members oscillate at a frequency between 4 Hz and 50 Hz;the device is designed so that the first and second inertial members oscillate at a frequency between 5 Hz and 15 Hz.
    [0008] Furthermore, the invention also relates to a watch movement comprising the device as defined above and an energy distribution member provided with teeth and intended to be stressed by an energy storage device.
    Finally, the invention also relates to a timepiece comprising a movement as defined above.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Other characteristics and advantages of the invention will become apparent from the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings.
    In the drawings:FIG. 1 is a schematic view of a timepiece which may include a mechanism according to one embodiment of the invention,FIG. 2 is a block diagram of the movement of the timepiece of FIG. 1,Figure 3 is a plan view of part of the movement of Figure 2 according to one embodiment of the invention, including the regulator, the anchor and the power distribution member.
    MORE DETAILED DESCRIPTION
    In the various figures, the same references designate identical or similar elements.
    Figure 1 shows a timepiece 1 such as a watch, comprising:a box 2,a watch movement 3 contained in the case 2,generally, a winder 4,a dial 5,a glass 6 covering the dial 5,a time indicator 7, comprising for example two hands 7a, 7b respectively for the hours and the minutes, arranged between the glass 6 and the dial 5 and actuated by the watch movement 3.
    As shown schematically in Figure 2, the watch movement 3 can include for example:a device 8 for storing mechanical energy, generally a barrel spring,a mechanical transmission 9 driven by the device 8 for storing mechanical energy,the aforementioned time indicator 7,an energy distribution member 10 (for example an escape wheel),an anchor 11 adapted to sequentially retain and release the energy distribution member 10,a regulator 12, which is a mechanism comprising an oscillating inertial regulating member, controlling the anchor 11 to move it regularly so that the energy distribution member is moved step by step at constant time intervals.
    The anchor 11 and the regulator 12 form a mechanism 13. As shown in Figure 3, the mechanism 13 can advantageously be a monolithic system formed in the same plate 14 (usually flat) and whose moving parts are designed to move essentially in a mean plane XY of said plate 14 (X and Y are two perpendicular axes defining the plane of the plate 14, while the thickness of the plate 14 extends along a Z axis perpendicular to the XY axes).
    The plate 14 can be thin, for example about 0.05 to about 1 mm, depending on the nature of the material of the plate 14.
    The plate 14 may have transverse dimensions, in the XY plane of the plate (in particular width and length, or diameter), of between approximately 10 mm and 40 mm.
    The plate 14 can be made of any suitable rigid material, preferably having a low Young's modulus to have good elasticity properties and a low oscillation frequency. Examples of materials that can be used to make the plate 14 include silicon, nickel, iron / nickel alloy, steel, titanium. In the case of silicon, the thickness of the plate 14 can for example be between 0.2 and 0.6 mm.
    As understood here, by monolithic mechanism is meant a mechanism composed of elements which, by the nature or the shape of their assembly, are integral with each other to the point that any deformation of a component causes a deformation of other parts. The monolithic mechanism can advantageously be formed in a single piece of material, optionally treated to present an outer layer of a different nature from the rest of the material (for example an oxidized layer). As a variant, the monolithic mechanism can also include certain attached parts (for example glued, welded or other) in the plane of the plate 14.
    The various members formed in the plate 14, are for example obtained by making openings in the plate 14, obtained by any manufacturing process used in micromechanics, in particular the processes used for the manufacture of MEMS.
    In the case of a silicon wafer 14, the wafer can be locally hollowed out, for example by deep reactive ion etching (DRIE - "Deep Reactive Ion Etching") or possibly by laser cutting for small series.
    In the case of an iron / nickel plate 14, the plate could in particular be produced by the LIGA process, or by laser cutting.
    In the case of a plate 14 of steel or titanium, the plate 14 can be hollowed out for example by wire spark erosion (WEDM).
    The constituent parts of the mechanism will now be described in more detail. Some of these parts are rigid and others (in particular those called elastic branches or beams) are elastically deformable, essentially in bending. The difference between the rigid parts and the elastic parts is their stiffness in the XY plane of the plate 14, which is due to their shape and in particular to their slenderness. The slenderness can be measured in particular by the slenderness ratio (length / width ratio of the part concerned). For example, the rigid parts have a stiffness at least about 100 times greater in the XY plane than the elastic parts. Typical dimensions for elastic links, for example the elastic legs which will be described hereinafter, include lengths of for example between 5 and 13 mm and widths of for example between 0.01 mm (10 µm) and 0.04 mm (40 µm), especially about 0.025 mm (25 µm). Taking into account the widths of the beams and the thickness of the plate 14, the slenderness ratio of these beams in longitudinal section (thickness / width) is between 5 and 60. The slenderness ratio in section (thickness / width) ) as much as possible is to be preferred to limit the out-of-plane oscillation modes.
    The plate 14 comprises a support 15 which is secured to a support plate 14a, for example by screws or the like (not shown) passing through holes 15a of the support 15. The support plate 14a is secured to the housing 2 of the timepiece 1. The support 15 may optionally be in the form of a frame as in the example of FIG. 3.
    The energy distribution member 10 may be an escape wheel mounted to rotate, for example on the support plate 14a, so as to be able to rotate about an axis of rotation Z1 (said third axis of rotation) perpendicular to the XY plane of the plate 14. The energy distribution member 10 is requested by the energy storage device 8 in a single direction of rotation 16.
    The energy distribution member 10 has external teeth 17.
    The regulator 12 comprises a rigid regulating member 18 and an elastic suspension 19 which connects the regulating member 18 to the support 15 so that the regulating member 18 is movable substantially in rotation about an axis of rotation Z0 (said first axis of rotation) perpendicular to the plane of the plate 14. The regulating member 18 may optionally include a central arm 20 extending diametrically on either side of the first axis of rotation Z0 to ends respectively integral with two masses 21a, 21b. The masses 21a, 21b can be in the form of circular arcs centered on the first axis of rotation Z0.
    The elastic suspension 19 which connects the regulating member 18 of the regulator 12 to the support 15, may for example comprise two elastic suspension links 22. Each elastic suspension link 22 may for example comprise an elastic branch 23. Each elastic branch 23 may optionally include a rigid section 23a, for example towards the center of said elastic branch 23. The elastic branches 23 can extend substantially radially with respect to the first axis of rotation Z0, from the support 15 to the central arm 20 of the regulating body 18.
    The anchor 11 is a rigid part which is elastically connected to the support 15, so as to be able to oscillate, for example in a substantially rotational movement about an axis Z2 (said second axis of rotation) perpendicular to the XY plane . Advantageously, the anchor 11 can be connected to the support 15 by an elastic suspension 24, comprising for example two elastic suspension links 25. Each elastic suspension link 25 may for example comprise an elastic branch 26. Each elastic branch 26 may optionally include a rigid section 26a, for example towards the center of said elastic branch 26. The elastic branches 26 can extend substantially radially with respect to the second axis of rotation Z2, from the support 15 to a substantially central part of the anchor 11.
    The anchor 11 comprises two stop members 27, 28 in the form of lugs projecting substantially towards the third axis of rotation Z1, which are adapted to cooperate with the teeth 17 of the energy distribution member 10.
    The stop members 27, 28 can be arranged in the concave internal part of a main body 29 of arcuate shape belonging to the anchor 11, partially including the energy distribution member 10.
    The anchor 11 may further include a link arm 30 which extends from the main body 29 to a free end, and which is disposed radially with respect to the second axis of rotation Z2.
    The second axis of rotation Z2 can be arranged for example substantially at the junction between the connecting arm 30 and the arcuate portion 29.
    The anchor 11 may further comprise two inertial masses 31a, 31b which are diametrically opposed with respect to the second axis of rotation Z2 and which are secured respectively to the main body 29 and to the free end of the link arm 30. The masses 31a, 31b can be in the form of circular arcs centered on the second axis of rotation Z2.
    The regulating member 18 and the anchor 11 are further interconnected by a coupling link 32 which requires that the regulating member 18 and the anchor 11 have counter-rotating movements, that is to say rotational movements in phase opposition respectively around the first and second axes of rotation Z0 and Z2. The coupling link is also arranged so that, in operation, the regulating member 18 and the anchor 11 have respective kinetic moments LO and LA which are substantially equal, respectively around the first and second axes of rotation Z0 and Z2. The LO / LA ratio can be between 0.9 and 1.1, advantageously between 0.99 and 1.01.
    The coupling link 32 can connect two respective opposite parts of the regulating member 18 and of the anchor 11. It can include for example an elastic coupling branch 33. By "two opposite parts" is meant two parts located on either side of a straight line joining the first and second axes of rotation Z0, Z2.
    For example, the elastic coupling branch 33 can interconnect the aforementioned masses 21b, 31b. Optionally, the elastic coupling branch 33 may include a rigid section 33a, for example towards the center of said elastic coupling branch 33.
    The anchor 11 is thus controlled by said regulating member 18 to regularly and alternately block and release the energy distribution member 10 using the stop members 27, 28, so that said member power distribution 10 moves step by step in the direction 16 under the stress of the energy storage device 8 in a repetitive motion cycle, and said anchor 11 is further adapted to transfer mechanical energy to the regulating member 18 during this repetitive movement cycle, in a manner known per se.
    Thanks to the counter-rotating movements of the anchor 11 and of the regulating member 18, the mechanism is insensitive or insensitive to the rotational accelerations undergone by the mechanism, despite the low oscillation frequencies of the mechanism (the regulating member 18 and the anchor 11 typically oscillate at a frequency between 4 Hz and 50 Hz, in particular between 5 Hz and 15 Hz).
    Note that instead of using the anchor 11 to balance the movements of the regulating member 18, one could use any second inertial member, rotatably mounted about an axis of rotation parallel to the axis of rotation of the regulating member, connected to the regulating member 18 so that the two parts are counter-rotating and having a moment of inertia LA of the same order as LO, as defined above. In general, the mechanisms according to the invention comprise first and second inertial members linked together by a coupling link arranged so that the first inertial member and the second inertial member always rotate in opposite directions and so that the ratio of their LO / LA angular moments is between 0.9 and 1.1.
    It will be noted that the devices produced according to the invention are particularly suitable for production according to the method described in French patent application FR1753603 filed on April 25, 2017.
    权利要求:
    Claims (11)
    [1]
    1. Device for a timepiece comprising a mechanism (13) of planar shape extending along a mean plane (XY), said mechanism (13) comprising:- a support (15),- a first inertial member (18) connected to the support (15) by a first elastic suspension (19) arranged so that said first inertial member (18) has an alternating movement substantially in rotation about a first axis of rotation (Z0) , with a certain kinetic moment LO around the first axis of rotation (Z0),- a second inertial member (11) connected to the support (15) by a second elastic suspension (25) arranged so that said second inertial member (11) has an alternating movement substantially in rotation about a second axis of rotation (Z2) , with a certain angular momentum LA around the second axis of rotation (Z2),- a coupling link (32) connecting the first inertial member (18) to the second inertial member (11),characterized in thatthe coupling link (32) is arranged so that the first inertial member (18) and the second inertial member (11) always rotate in opposite directions and so that a ratio of the angular moments LO / LA is between 0 , 9 and 1.1.
    [2]
    2. Device according to claim 1, wherein LO / LA is between 0.99 and 1.01.
    [3]
    3. Device according to any one of the preceding claims, wherein the coupling link (32) comprises an elastic branch (33) connecting the first inertial member (18) to the second inertial member (11).
    [4]
    4. Device according to any one of the preceding claims, wherein the coupling link (32) is connected to the first inertial member (18) and to the second inertial member (11) respectively at two points arranged on either side of the d 'a straight line connecting the first and second axes of rotation (Z0, Z2) in the mean plane (XY).
    [5]
    5. Device according to any one of the preceding claims, wherein said second inertial member (11) is an anchor (11) adapted to cooperate with an energy distribution member (10) provided with teeth (17) and intended to be requested by an energy storage device (8), said anchor (11) being controlled by said first inertial member (18) to regularly and alternately block and release the energy distribution member (10), so that said energy distribution member (10) moves step by step under the stress of the energy storage device (8) in a repetitive movement cycle, and said anchor (11) being adapted to transfer energy mechanically to said first inertial member (18) during this repetitive movement cycle.
    [6]
    6. Device according to claim 5, wherein said second inertial member (11) comprises a main body (29) adapted to cooperate with the energy distribution member (10) and a connecting arm (30) which are diametrically opposite with respect to the second axis of rotation (Z2), the main body (29) and the link arm (30) respectively having inertial masses (31a, 31b) diametrically opposed with respect to the second axis of rotation (Z2).
    [7]
    7. Device according to any one of the preceding claims, constituting a monolithic mechanism.
    [8]
    8. Device according to any one of the preceding claims, designed so that the first and second inertial members (18, 11) oscillate at a frequency between 4 Hz and 50 Hz.
    [9]
    9. Device according to claim 8, designed so that the first and second inertial members (18, 11) oscillate at a frequency between 5 Hz and 15 Hz.
    [10]
    10. Watch movement (3) comprising a device (13) according to any one of claims 1 to 9 and an energy distribution member (10) provided with teeth (17) and intended to be biased by a storage device. energy (8).
    [11]
    11. Timepiece (1) comprising a timepiece movement (3) according to claim 10.
    类似技术:
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    同族专利:
    公开号 | 公开日
    CH714165A2|2019-03-15|
    FR3071075A1|2019-03-15|
    FR3071075B1|2019-09-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN106537264B|2014-09-09|2019-03-15|Eta瑞士钟表制造股份有限公司|Clock and watch regulating mechanism, watch and clock movement and clock and watch|
    CH710278A1|2014-10-24|2016-04-29|Richemont Int Sa|Regulating organ for a mechanical watch movement.|
    EP3032350A1|2014-12-09|2016-06-15|LVMH Swiss Manufactures SA|Mechanism for a timepiece and timepiece having such a mechanism|
    EP3182213B2|2015-12-16|2020-10-21|Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie|Mechanism for adjusting an average speed in a clock movement and clock movement|FR3094803B1|2019-04-05|2021-04-23|Lvmh Swiss Mft Sa|Spherical oscillator for watch mechanism|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR1758541A|FR3071075B1|2017-09-14|2017-09-14|DEVICE FOR WATCHMAKING PART, CLOCK MOVEMENT AND TIMEPIECE COMPRISING SUCH A DEVICE|
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