• 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:
    Mechanical energy collecting device (14) comprising a support (17) subjected to accelerations, an inertial mass (15), an elastic suspension (35) connecting the inertial mass to the support and allowing the inertial mass to oscillate in translation into a plane of oscillation (XY) under the effect of said accelerations, a toothed wheel (22), and a ratchet transmission device (27-34) adapted to drive the gear in predetermined rotation when the inertial mass oscillates . The ratchet transmission device comprises a pawl (28-29) connected to the inertial mass and mounted to move in translation relative to the support, tangentially to the toothed wheel, a translation direction (X) included in the oscillation plane. . Such a device can be used for reassembling a mechanical timepiece.
    公开号:CH714767A2
    申请号:CH00303/19
    申请日:2019-03-12
    公开日:2019-09-13
    发明作者:Pieter Van Zoest Wouter；Johannes Benjamin Ypma Wout；Mercier Thomas；Semon Guy
    申请人:Lvmh Swiss Mft Sa；
    IPC主号:
    专利说明:

    Z
    CH 714 767 A2
    Description
    TECHNICAL FIELD This description relates to mechanical energy collection devices, in particular for timepieces, as well as to watch movements and to timepieces comprising such devices.
    TECHNOLOGICAL BACKGROUND There are known mechanical energy collection devices comprising:
    - support subject to acceleration,
    - an inertial mass mounted to oscillate in a plane of oscillation under the effect of said accelerations,
    - a toothed wheel parallel to the plane of oscillation and rotatably mounted about an axis of rotation, said axis of rotation being fixed relative to the support and perpendicular to the plane of oscillation,
    - a ratchet transmission device adapted to drive the toothed wheel only in a predetermined direction of rotation when the inertial mass oscillates in the plane of oscillation.
    In known mechanical energy collection devices, in particular in the watchmaking field, the inertial mass is rotatable relative to the support. Watch mechanisms, however, undergo little rotational acceleration, so that the mechanical energy collection carried out by these known devices is of low efficiency.
    The present description aims in particular to overcome this drawback.
    OBJECTS AND SUMMARY OF THE DESCRIPTION For this purpose, a mechanical energy collection device of the kind in question is characterized in that it further comprises an elastic suspension connecting the inertial mass to the support and adapted to allow the inertial mass to oscillate according to translational movements in the plane of oscillation, and in that the ratchet transmission device comprises at least one first pawl connected to the inertial mass and mounted movable in translation relative to the support, tangentially to the toothed wheel, in a first direction of translation included in the plane of oscillation.
    Thanks to these provisions, mechanical energy is collected resulting from translational accelerations undergone by the support in the oscillation plane, which improves the efficiency of the energy collection device.
    In various embodiments of the mechanical energy collection device, one can optionally have recourse to one and / or the other of the following provisions:
    the ratchet transmission device further comprises a second pawl connected to the inertial mass and mounted movable in translation relative to the support, tangentially to the toothed wheel, in a second direction of translation not parallel to the first direction of translation and understood in the oscillation plane;
    - the first and second directions of translation are substantially perpendicular to each other;
    - The first pawl is connected to the support by two first elastic suspension branches parallel to each other and perpendicular to the first direction of translation, and / or the second pawl is connected to the support by two second elastic suspension branches parallel to each other and perpendicular to the second direction of translation;
    - the toothed wheel has an external toothing, the first pawl has a first rigid head carrying a first elastic tongue which extends from the first rigid head to a free end, at an angle in the first direction of translation and towards the toothing external of the toothed wheel, according to the direction of rotation, the free end of the first elastic tongue being adapted to act on the external toothing of the toothed wheel to rotate the toothed wheel in the direction of rotation;
    the second pawl comprises a second rigid head carrying a second elastic tongue which extends from the second rigid head to a free end, at an angle in the second direction of translation and towards the external toothing of the toothed wheel, according to the direction of rotation, the free end of the second elastic tongue being adapted to act on the external toothing of the toothed wheel to rotate the toothed wheel in the direction of rotation;
    - The first pawl is connected to the inertial mass by a first elastic drive branch which extends in the first direction of translation and which is adapted to move the first pawl in the first direction of translation to cause the free end to act of the first elastic tongue on the external toothing of the toothed wheel so as to rotate the toothed wheel in the direction of rotation, and / or the second pawl is connected to the inertial mass by a second elastic drive branch which s extends in the second direction of translation and which is adapted to move the second pawl in the second direction of translation to act the free end of the second elastic tongue on the external toothing of the toothed wheel so as to rotate the toothed wheel in the direction of rotation;
    - The mechanical energy collection device further comprises a non-return pawl which is carried by the support and which is adapted to prevent the toothed wheel from rotating in a direction opposite to said direction of rotation;
    - the non-return pawl has an elastic non-return tongue which extends from the support to a free end at an angle towards the external toothing of the toothed wheel, according to the direction of rotation, the free end of the tongue
    CH 714 767 A2 non-return elastic being adapted to act on the external toothing of the toothed wheel to prevent the toothed wheel from turning in the direction opposite to said direction of rotation;
    - the inertial mass surrounds the support;
    - The elastic suspension comprises an intermediate rigid member which is connected to the support by two third elastic branches of suspension parallel to each other and which is connected to the inertial mass by two fourth elastic branches of suspension which are parallel to each other and substantially perpendicular to the third elastic branches of suspension;
    - the support, the inertial mass, the elastic suspension and the ratchet transmission device constitute a monolithic mechanism;
    Furthermore, the invention also relates to a timepiece movement comprising the mechanical energy collection device as defined above and an energy storage device driven by said toothed wheel.
    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 appear during the following description of one of its embodiments, given by way of nonlimiting example, with reference to the accompanying drawings. In the drawings:
    fig. 1 is a schematic view of a timepiece which may include a mechanical energy collection mechanism, FIG. 2 is a block diagram of the movement of the timepiece of FIG. 1, and fig. 3 is a plan view of an embodiment of the mechanical energy collection mechanism of the movement of FIG. 2.
    MORE DETAILED DESCRIPTION In the various figures, the same references designate identical or similar elements.
    [0012] FIG. 1 represents a timepiece 1 such as a watch, comprising:
    - a housing 2,
    - a watch movement 3 contained in the case
    - 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, placed between the glass 6 and the dial 5 and actuated by the watch movement 3.
    As shown schematically in FIG. 2, the watch movement 3 can for example include:
    - a device 14 for collecting mechanical energy,
    a device 8 for storing mechanical energy, for example a barrel spring, supplied with mechanical energy by the device 14 for collecting mechanical energy,
    a mechanical transmission 9 driven by the device 8 for storing mechanical energy,
    - the above-mentioned 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 which can optionally be a monolithic system formed in the same plate.
    As shown in FIG. 3, the mechanical energy collection device 14 may include:
    - a rigid support 17, integral with the housing 2 and subjected to accelerations during movements of the user's wrist,
    a rigid inertial mass 15,
    an elastic suspension 35 connecting the inertial mass 15 to the support 17 and allowing the inertial mass 15 to oscillate in a plane of oscillation XY under the effect of said accelerations,
    a rigid toothed wheel 22 parallel to the plane of oscillation XY and rotatably mounted about an axis of rotation 23, said axis of rotation 23 being fixed relative to the support 17 and parallel to an axis Z perpendicular to the plane of oscillation XY ,
    - a ratchet transmission device 27-34 adapted to drive the toothed wheel 22 only in a predetermined direction of rotation R when the inertial mass 15 oscillates in the plane of oscillation XY; the pawl transmission device 27-34 comprises a first pawl 28-29 and a second pawl 32-33 each connected to the inertial mass 15
    CH 714 767 A2 and mounted movable in translation relative to the support 17, tangentially to the toothed wheel 22, respectively in first and second directions of translation X, Y not parallel (the directions of translation X and Y can advantageously be perpendicular to each other ) included in the XY oscillation plane.
    Optionally, the ratchet mechanism could include only one of the two pawls.
    The support 17, the inertial mass 15, the elastic suspension 35 and the ratchet transmission device 27-34 may constitute a monolithic mechanism, formed in the same plate 14a which extends along the plane of oscillation XY, and whose moving parts are designed to move essentially in the XY plane.
    The plate 14a can be thin, for example about 0.05 to about 1 mm, depending on the nature of the material of the plate 14a.
    The plate 14a 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 14a 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 which can be used to make the plate 14a include silicon, nickel, iron / nickel alloy, steel, titanium. In the case of silicon, the thickness of the plate 14a can for example be between 0.2 and 0.6 mm.
    As understood here, the term “monolithic mechanism” means a mechanism composed of elements which, by the nature or the form of their assembly, are integral with one another to the point that any deformation of a component leads to a distortion of other parts. The monolithic mechanism can advantageously be formed in a single piece of material, possibly 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 may also include certain added parts (for example glued, welded or other) in the plane of the plate 14a.
    The different bodies formed in the plate 14a, are for example obtained by making openings in the plate 14a, obtained by any manufacturing process used in micromechanics, in particular the processes used for the manufacture of MEMS.
    In the case of a silicon plate 14a, the plate 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 14a, the plate could in particular be produced by the LIGA process, or by laser cutting.
    In the case of a steel or titanium plate 14a, the plate 14a can be hollowed out, for example by wire EDM (WEDM).
    The constituent parts of the mechanical energy collection mechanism will now be described in more detail. Some of these parts are rigid and others (notably 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 14a, 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 higher in the XY plane, than the elastic parts. Typical dimensions for elastic connections, for example the elastic branches which will be described below, include lengths for example between 5 and 13 mm and widths for example between 0.01 mm (10 μm) and 0.04 mm (40 μm), in particular approximately 0.025 mm (25 μm). Given the widths of the beams and the thickness of the plate 14a, the slenderness ratio of these beams in longitudinal section (thickness / width) is between 5 and 60. The slenderness ratio in section (thickness / width) ) the largest possible is to be preferred to limit the out-of-plane oscillation modes.
    The support 17 can be arranged inside the inertial mass 15, in a cutout 16 formed in said inertial mass 15, which makes it possible to maximize the inertial mass 15 to improve the mechanical efficiency of the collection device d 'energy.
    In the embodiment shown, the support 17 may have a general V shape with two branches 18-19 connected together by a central part 20 and terminated respectively by wings 25, 26. The wings 25, 26 can be parallel respectively to the first direction of translation X and to the second direction of translation Y.
    The toothed wheel 22 can be rotatably mounted in the plane of the plate 14a, thanks to a mounting plate 39 parallel to the aforementioned plate 14a and secured for example to the support 17 by screws 40, 41 or others. The toothed wheel 22 can have an external toothing 24.
    The mechanical energy collection device may include a non-return pawl 21 which is carried by the support 17 and which is adapted to prevent the toothed wheel 22 from rotating in a direction opposite to said direction of rotation R. For example , the non-return pawl can be constituted by an elastic non-return tab 21 secured to the support 17, advantageously formed in one piece with the support 17. This elastic non-return tab 21 can be formed on the central part 20 of the support . The elastic tongue 21 can extend obliquely radially towards the external toothing 24 and orthoradially
    CH 714 767 A2 in the direction R, from the support 17 to a free end which acts on the external toothing 24 to prevent rotation of the toothed wheel 22 in the direction opposite to the direction of rotation R.
    The first pawl 28-29 can be connected to the support 17 by two first elastic suspension branches 27 parallel to each other and perpendicular to the first direction of translation X. For example, the first elastic suspension branches 27 can be connected to the wing 25 of the support, and can in particular be formed in one piece with the wing 25. The first pawl may comprise a first rigid head 28 carrying a first elastic tongue 29 which extends from the first rigid head 28 to at a free end, at an angle in the first direction of translation X and towards the external toothing 24 of the toothed wheel, in the direction of rotation R, the free end of the first elastic tongue 29 being adapted to act on the external toothing 24 of the toothed wheel to rotate the toothed wheel 22 in the direction of rotation R. The first rigid head 28 can be connected to the inertial mass 15 by a first elastic drive branch 30 which is adapted to move the first rigid head 28 following the translation component in the first direction of translation X, with the movement of the inertial mass 15, to rotate the toothed wheel 22 in the direction of rotation R with the free end of the first elastic tongue 29.
    权利要求:
    Claims (10)
    [1]
    The second pawl 32-33 can be connected to the support by two second elastic suspension branches 31 parallel to each other and perpendicular to the second direction of translation Y. For example, the second elastic suspension branches 31 can be connected to the 'wing 26 of the support, and can in particular be formed in one piece with the wing 26. The second pawl 3233 may comprise a second rigid head 32 carrying a second elastic tongue 33 which extends from the second rigid head 32 to at a free end, at an angle in the second direction of translation Y and towards the external toothing 24 of the toothed wheel, in the direction of rotation R, the free end of the second elastic tongue 33 being adapted to act on the external toothing 24 of the toothed wheel to rotate the toothed wheel 22 in the direction of rotation R. The second rigid head 32 can be connected to the inertial mass 1 5 by a second elastic drive branch 34 which is adapted to move the second rigid head 32 following the translation component in the second direction of translation Y of the movement of the inertial mass 15, to rotate the toothed wheel 22 in the direction of rotation R with the free end of the second elastic tongue 33.
    The elastic suspension 35 is adapted to allow the inertial mass 15 to oscillate in translational movements in the XY plane of oscillation.
    For example, the elastic suspension may include an intermediate rigid member 37 which is connected to the support (for example to the branch 18 of the support) by two third elastic suspension branches 38 parallel to each other and which is connected to the inertial mass 17 by two fourth elastic suspension branches 37 parallel to one another and substantially perpendicular to the third elastic suspension branches 38. The third elastic suspension branches 38 can for example be offset by a small angle a relative to the first direction of translation X , and the fourth elastic suspension branches 37 can for example be offset by the same angle a relative to the second direction of translation Y. The angle a can be for example less than 20 degrees.
    claims
    1. Mechanical energy collection device (14) comprising:
    - a support (17) subjected to accelerations,
    - an inertial mass (15) mounted to oscillate in a plane of oscillation (XY) under the effect of said accelerations,
    - a toothed wheel (22) parallel to the plane of oscillation (XY) and rotatably mounted about an axis of rotation (23), said axis of rotation being fixed relative to the support (17) and perpendicular to the plane of oscillation (XY),
    - a ratchet transmission device (27-34) adapted to drive the toothed wheel (22) only in a predetermined direction of rotation (R) when the inertial mass (15) oscillates in the plane of oscillation (XY), characterized in that it further comprises an elastic suspension (35) connecting the inertial mass (15) to the support (17) and adapted to allow the inertial mass (15) to oscillate according to translational movements in the plane of oscillation (XY), and in that the pawl transmission device (27-34) comprises at least one first pawl (28,29) connected to the inertial mass (15) and mounted movable in translation relative to the support (17 ), tangentially to the toothed wheel (22), in a first direction of translation (X) included in the plane of oscillation (XY).
    [2]
    2. Mechanical energy collection device (14) according to claim 1, in which the pawl transmission device (27-34) further comprises a second pawl (32-33) connected to the inertial mass (15) and mounted movable in translation relative to the support (17), tangentially to the toothed wheel (22), in a second direction of translation (Y) not parallel to the first direction of translation (X) and included in the plane of oscillation ( XY).
    [3]
    3. Mechanical energy collection device (14) according to claim 2, wherein the first and second directions of translation (X, Y) are substantially perpendicular to each other.
    [4]
    4. Mechanical energy collection device (14) according to claim 2 or claim 3, wherein the first pawl (28-29) is connected to the support (17) by two first elastic suspension arms (27) parallel between them and perpendicular to the first direction of translation (X), and the second pawl (32-33) is connected to the support (17) by two second elastic suspension arms (31) parallel to each other and perpendicular to the second direction of translation (Y).
    CH 714 767 A2
    [5]
    5. Mechanical energy collection device (14) according to any one of claims 2 to 4, in which the toothed wheel (22) has an external toothing (24), the first pawl (28-29) has a first rigid head (28) carrying a first elastic tongue (29) which extends from the first rigid head (28) to a free end, at an angle in the first direction of translation (X) and towards the external toothing (24 ) of the toothed wheel, according to the direction of rotation (R), the free end of the first elastic tongue (29) being adapted to act on the external toothing (24) of the toothed wheel to rotate the toothed wheel (22 ) in the direction of rotation (R), the second pawl (32-33) comprises a second rigid head (32) carrying a second elastic tongue (33) which extends from the second rigid head (32) to a free end, at an angle in the second direction of translation (Y) and towards the tooth ure external (24) of the toothed wheel, in the direction of rotation (R), the free end of the second elastic tongue being adapted to act on the external teeth (24) of the toothed wheel to rotate the toothed wheel ( 22) in the direction of rotation (R).
    [6]
    6. Mechanical energy collection device according to claim 5, in which the first pawl (28-29) is connected to the inertial mass (15) by a first elastic drive branch (30) which extends along the first direction of translation (X) and which adapted to move the first pawl (28-29) in the first direction of translation (X) to cause the free end of the first elastic tongue (29) to act on the external toothing (24 ) of the gear wheel so as to rotate the gear wheel (22) in the direction of rotation (R), and the second pawl (32-33) is connected to the inertial mass (15) by a second elastic branch of drive (34) which extends in the second direction of translation (Y) and which adapted to move the second pawl (32-33) in the second direction of translation (Y) to cause the free end of the second tongue to act elastic (33) on the external toothing (24) of the gear so as to rotate the gear (22) in the direction of rotation (R).
    [7]
    7. Mechanical energy collection device (14) according to any one of the preceding claims, further comprising a non-return pawl (21) which is carried by the support (17) and which is adapted to prevent the toothed wheel. (22) to rotate in a direction opposite to said direction of rotation (R).
    [8]
    8. Device for collecting mechanical energy according to claim 7, in which the non-return pawl (21) comprises an elastic non-return tab which extends from the support (17) to a free end, biased towards the external toothing (24) of the toothed wheel, in the direction of rotation (R), the free end of the non-return elastic tongue being adapted to act on the external toothing (24) of the toothed wheel to prevent the wheel toothed (22) to rotate in the opposite direction to said direction of rotation.
    [9]
    9. Mechanical energy collection device (14) according to any one of the preceding claims, in which the inertial mass (15) surrounds the support (17).
    [10]
    10. Mechanical energy collection device (14) according to any one of the preceding claims, in which the elastic suspension (35) comprises an intermediate rigid member (37) which is connected to the support (17) by two third elastic branches suspension (38) parallel to each other and which is connected to the inertial mass (15) by two fourth elastic suspension branches (36) parallel to each other and substantially perpendicular to the third elastic suspension branches (38).
    类似技术:
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    同族专利:
    公开号 | 公开日
    FR3079005B1|2020-06-26|
    FR3079005A1|2019-09-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US211280A|1879-01-07|Improvement in self-winding watches |
    CH167226A|1932-12-14|1934-02-15|Henry Sandoz & Fils|Self-winding timepiece by oscillating weight.|
    US2874532A|1954-01-08|1959-02-24|Baier Paul|Self-winding watch|
    法律状态:
    2021-12-30| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    FR1852162A|FR3079005B1|2018-03-13|2018-03-13|MECHANICAL ENERGY COLLECTION DEVICE, PARTICULARLY FOR A WATCHMAKING PART, A WATCHMAKING MOVEMENT AND A WATCHMAKING PART COMPRISING SUCH A DEVICE|
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