• 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 present invention relates to an escapement mechanism arranged to transmit mechanical energy pulses from a driving source to an oscillating timepiece regulator via a leaf spring (2) working in buckling around a motor. a point of inflection, said leaf spring (2) being capable, by means of an armature rocker (3) and a trigger rocker (4), of accumulating energy from the driving source during a winding phase, to remain then in an armed state during a rest phase, then to restore the accumulated energy to said oscillating regulator during a pulse phase. The exhaust mechanism further comprises a locking member (13) capable of occupying a first position in which it limits the movement of the armature rocker (3), the regulator being kinematically connected to the locking member ( 13) so as to position the locking member (13) in the first position during the rest phase.
    公开号:CH710925A2
    申请号:CH00120/16
    申请日:2016-01-29
    公开日:2016-09-30
    发明作者:Oes Stéphane；Kummer Matthieu
    申请人:Sowind S A；
    IPC主号:
    专利说明:

    Technical area
    The present invention relates to the field of mechanical watchmaking. It relates, more particularly, to an escapement mechanism arranged to transmit mechanical energy pulses from a driving source to an oscillating timepiece regulator by means of a leaf spring working in buckling around a inflection point. State of the art
    In the field of watchmaking, it is well known an exhaust mechanism arranged to transmit mechanical energy pulses from a power source to an oscillating timepiece controller via a leaf spring working in buckling around a point of inflection.
    Such a mechanism is described in particular in document WO 99/64 936. The latter more generally discloses a method for transmitting pulses of mechanical energy from a driving source to an oscillating regulator, via a leaf spring working in buckling. More particularly, this method is implemented in particular by an escape mechanism illustrated in FIG. 1, intended to maintain the oscillations of a regulator, composed for example by a balance 1 associated with a spiral, by delivering energy received from a driving source, such as a barrel for example, not visible on the fig. 1, via a leaf spring 2, whose ends are positioned such that it occupies a stable position corresponding to a second mode buckling. The leaf spring 2 is capable, by means of an armature rocker 3 and a trigger rocker 4, of accumulating the energy coming from the driving source during a winding phase, to remain in an armed state during a rest phase and to restore the energy accumulated to said oscillating regulator during a pulse phase.
    The trigger rocker 4 is kinematically linked to the leaf spring 2 substantially at its central point of inflection. The trigger rocker 4 comprises, at one end, a fork 5 intended to cooperate with a plate 6 and a plate pin 7 that includes the rocker 1.
    The armature rocker 3 comprises a central portion and two symmetrical wings whose ends are kinematically connected to the leaf spring 2. The central portion comprises a first 8 and a second 9 pallet rest, intended to cooperate respectively with a first 10 and a second 11 escape wheel.
    Both flip-flops 3 and 4 are rotatably mounted one with reference to the other.
    The wheels 10 and 11 each comprise a pinion meshing with the last wheel 12 of the work train so that the wheels 10 and 11 pivot in a synchronized manner. The wheels 10 and 11 have a particular toothing, the shape of which is adapted to cooperate with the first 8 and second 9 pallets of rest of the rocker arm 3, on the one hand to transmit energy to this rocker d ' arming 3 and, secondly, to block the rotation of the escape wheels 10 and 11, according to the phases of operation which will be summarized below. For more details, it is possible to refer to the document cited in the introduction.
    FIG. 1 shows an exhaust mechanism of the prior art immediately after a pulse phase and at the beginning of a winding phase, the rocker 1 rotates counterclockwise, the plateau pin 7 comes out of the fork, the first rest pallet 8 has just disengaged from the wheel 10 and the spring 2 is in a stable position corresponding to a second mode buckling. During the arming phase, while the rocker 1 performs its supplementary arc, the first escape wheel 10 rotates freely and the second escape wheel 11 cooperates with the second pallet of rest 9 of the rocking lever 3 to rotate the latter counterclockwise until a tooth of the second wheel 11 bears on the second pallet rest 9. Concomitantly, the leaf spring 2 has left its initial stable state corresponding to a second mode buckling and deformed under the action of the armature rocker 3 to a metastable state close to an unstable state corresponding to a fourth mode buckling. The armature of the leaf spring 2 is then maximal.
    During the next rest phase, the exhaust wheels 10, 11 are stopped, a tooth of the second wheel 11 being in abutment against the second pallet rest 9. The balance 1 continues its oscillation until the ankle 7 collides with the fork 5 of the trigger rocker 4, which marks the beginning of the impulse phase.
    During the pulse phase, the trigger rocker 4 pivots by acting on the leaf spring 2 which then suddenly switches from its unstable position to a stable state corresponding to a reverse second mode buckling of the previous. This change of state rotates the armature lever 3, causing the release of the second pallet of rest 9 of the second escape wheel 11. The armature rocker 3 pivots until the first pallet of rest 8 when the spring wheel 2 is being changed, the latter also acts on the trigger rocker 4, thus communicating with the balance 1 the energy accumulated during the winding of the spring -lame 2, through the fork 5.
    During the next alternation, the phases described above reproduce symmetrically with respect to the plane passing through the axes of rotation of the balance 1, flip-flops 4 and arming 3 and the point of rotation. inflection of the leaf spring 2.
    Such an escape mechanism allows in particular to maintain the pendulum oscillations steadily over the entire duration of the power reserve regardless of the energy source.
    The draft of the exhaust wheels 10 and 11 on the first 8 and second 9 pallets of rest of the armature rocker 3 ensures the locking function of the escape wheels. The pulling force must be sufficient to avoid inadvertent unlocking which could, for example, result from accelerations experienced by the timepiece in everyday use and which would lead to an advance of the timepiece's running and an overconsumption of time. 'energy. Conversely, the pulling force must be as small as possible in order to limit the energy required to achieve the clearance and thus optimize the power reserve. It has been found that it is not possible to adjust the draft of the escape wheels 10 and 11 satisfactorily so as to jointly obtain a sufficient locking force and a moderate energy consumption.
    The present invention aims to remedy this disadvantage.
    Disclosure of the invention
    This object is achieved by means of an escapement mechanism arranged to transmit mechanical energy pulses from a driving source to an oscillating timepiece controller via a leaf spring working in buckling mode. around a point of inflection and further having a locking member. The escapement mechanism is capable, by means of an armature rocker and a trigger rocker, of accumulating energy from the driving source during a winding phase, to remain thereafter in an armed state during a rest phase, then to restore the accumulated energy to said oscillating regulator during a pulse phase. The locking member is likely to occupy a first position in which it limits the movement of the armature rocker. The regulator is kinematically connected to the locking member so as to position the locking member in the first position during the rest phase.
    Thus, the mechanism of the invention eliminates the risk of accidental unlocking of the rocker arming during the rest phase and regardless of the pulling force.
    The invention also relates to a timepiece comprising such a mechanism.
    Brief description of the drawings
    Other features of the present invention will appear more clearly on reading the description which follows, with reference to the accompanying drawings, in which, in addition to FIG. 1 described above with reference to the state of the art and illustrating a view from above of the essential parts of the exhaust mechanism including a flexible blade, FIGS. 2, 3, 4, 5 and 6 are top views of the essential parts of the exhaust mechanism according to the invention shown in five successive states. Fig. 7 shows a detail of a variant of the invention.
    Mode (s) of realization of the invention
    It is shown in Figs. 2 to 6 an exhaust mechanism according to the invention. The components of the mechanism according to the invention are found in the mechanism described above with reference to FIG. 1 have been designated by the same numbers. They will not be described again in detail.
    We will simply note that we find, arranged on a frame of a watch movement, the following components:the balance 1 carrying the plate 6 and the plateau pin 7,the trigger rocker 4,the flip-flop 3 with the two symmetrical wings and the central portion having the first 8 and second 9 pallets of rest, andthe first 10 and the second 11 exhaust wheels,
    The mechanism according to the invention further comprises a locking member 13 pivoted on the frame and kinematically connected to the regulator. In the embodiment shown, the locking member 13 has two arms terminated by spouts 14, 15 and a rod 16 terminated by a fork 17. The spouts 14, 15 are intended to cooperate with notches 18, 19 that includes the rocker arm 3. A pin 20 secured to the trigger rocker 4 is housed in the fork 17 so that the locking member 13 is kinematically connected with the trigger rocker 4. The displacement of the organ locking 13 is thus synchronized with the oscillations of the balance 1.
    The locking member 13 can move between a first position shown in FIG. 2, and a second position shown in FIGS. 5 and 6, corresponding to the extreme positions occupied by the trigger rocker 4.
    The configuration of FIG. 2 corresponds to a rest phase during which the escape wheel 11 is stopped bearing against the second pallet rest 9 and the leaf spring 2 is armed in the metastable position close to an unstable position. During the previous pulse phase, the leaf spring 2 has placed the trigger rocker 4 in the position of FIG. 2 and the trigger rocker 4 has moved the locking member 13 in the first position in which the spout 14 is engaged in the notch 18. Thus, the locking member 13 limits the movement of the rocking lever 3 by preventing the rotation of the latter counterclockwise with reference to FIG. 2 and thus prevents the release of the second pallet of rest 9 of the escape wheel 11.
    In the configuration of FIG. 3, the plate pin 7 has begun to pivot the trigger rocker 4 which has itself driven the locking member 13 in rotation in the clockwise direction so as to disengage the nose 14 from the notch 18, that is, to unlock the armature rocker 3.
    [0025] In the transient configuration of FIG. 4, the pivoting of the trigger rocker 4 caused the change of state of the leaf spring 2 which in turn caused the tilting of the armature rocker 3 and the disengagement of the second pallet 9 of the escape wheel 11, as described in paragraph [0010].
    The configuration of FIG. 5 corresponds to the arming phase during which the first pallet of rest 8 of the armature rocker 3 bears against the escape wheel 10 which itself pivots in the clockwise direction under the action of the engine torque up to to arrive in the position of fig. 6 which corresponds to a new rest phase during which the leaf spring 2 is armed and ready to change state.
    In the configurations of FIGS. 5 and 6, the trigger rocker has completed its movement under the action of the leaf spring 2, gave the impulse to the plate pin 7 and positioned the locking member in the second position. In the configuration of FIG. 6 which corresponds to a new rest phase, the locking member 13 is in the second position, the spout 15 being engaged in the notch 19, and limits the movement of the armature rocker 3 by preventing it from leaving his rest position. The locking member 13 limits the movement of the armature rocker 3 in one direction when the member 13 is in the first position and in the opposite direction when the member 13 is in the second position.
    The device according to the invention thus prevents the accidental release of the pallets of rest 8, 9 of the escape wheels 10, 11 during the rest phases. In the case where the armature rocker 3 undergoes a strong acceleration, for example during a shock, the energy of the armature rocker 3 is absorbed by the locking member 13 on its pivot point and n ' is never transmitted to the trigger rocker 4 thus preventing the disturbance of the oscillating regulator. The locking of the armature rocker 3 also makes it possible to reduce the pulling force of the escape wheels 10, 11 on the rest pallets 8, 9 and consequently the energy necessary to effect the disengagement.
    The locking member 13 may be made of several parts or otherwise monolithically in any suitable material, for example silicon. In particular the leaf-spring 2 can be mounted on a frame 21 and the locking member 13 come in one piece with this frame 21 being connected thereto by at least one flexible arm.
    Preferably, it is also possible to provide the pallets rest 8 and 9 in a monolithic manner with the armature rocker 3. Thus, instead of having pallets made of rubies fixed on the rocking arm 3 , the whole can be made of silicon by multi-stage microfabrication techniques.
    Such an embodiment brings several advantages.The assembly formed by the pallets and the rocker is lighter, which improves the operation of the exhaust.The realization of the pallets 8 and 9 made of silicon makes it possible to obtain specific pallet shapes. As can be seen in fig. 7, one can realize pallets 8.9 with planes 22, optimized and better defined than the elliptical shapes of the stones. The skilled person can define the planes 22 of the pallets to have a point of contact between the escape wheel and the pallet which is always in the same place, or to avoid contacts inducing too great a retreat during the release of the wheel exhaust.The pallet / exhaust wheel assembly being made of silicon, the friction conditions between these elements are improved, avoiding oiling problems. The above description has been given by way of non-limiting illustration of the invention and the art may consider possible modifications without departing from the scope of the invention. In particular, the locking member 13 may be kinematically linked directly with the balance 1.
    权利要求:
    Claims (9)
    [1]
    An escapement mechanism arranged to transmit pulses of mechanical energy from a driving source to an oscillating timepiece regulator via a leaf spring (2) working in buckling around a point. of inflection, said leaf spring (2) being capable, by means of an armature rocker (3) and a trigger rocker (4), of accumulating energy from the driving source during a winding phase, then remaining in an armed state during a rest phase, and then restoring the accumulated energy to said oscillating regulator during a pulse phase, characterized in that the damping mechanism the escapement further comprises a locking member (13) capable of occupying a first position in which it limits the movement of the armature rocker (3), the regulator being kinematically connected to the locking member (13) of to position the locking member (13) in the first position during the rest phase.
    [2]
    2. Mechanism according to claim 1, characterized in that the locking member (13) is kinematically connected directly to the trigger rocker (4).
    [3]
    3. Mechanism according to claim 1 or 2, characterized in that the locking member (13) is pivoted.
    [4]
    4. Mechanism according to claim 1 or 2, characterized in that the leaf spring (2) is mounted on a frame (21) and in that the locking member (13) is made monolithically with the frame ( 21).
    [5]
    5. Mechanism according to one of the preceding claims, characterized in that the locking member (13) comprises a spout (14) capable of cooperating with a notch (18) that comprises the rocker arming (3).
    [6]
    6. Mechanism according to one of the preceding claims, characterized in that the locking member (13) limits the movement of the armature rocker (3) in a second position and in that the direction of limitation of the rocker arming device (3) when the locking member (13) is in the first position opposite to the limiting direction of the armature rocker (3) when said member (13) is in the second position.
    [7]
    7. Mechanism according to one of the preceding claims, characterized in that the armature rocker (3) comprises vanes (8, 9) arranged to cooperate with the exhaust wheels, and in that the rocker d arming and said pallets of rest are monolithic.
    [8]
    8. Mechanism according to claim 7, characterized in that the armature rocker and said pallets rest are made of silicon.
    [9]
    9. Timepiece comprising an exhaust mechanism according to one of claims 1 to 8.
    类似技术:
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    同族专利:
    公开号 | 公开日
    CH710685A8|2016-12-30|
    CH710925B1|2020-04-15|
    CH710685B1|2019-07-15|
    CH710685A1|2016-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP3599514A1|2018-07-25|2020-01-29|Sowind S.A.|Exhaust mechanism having bistable and monostable springs|
    EP3623875A1|2018-09-11|2020-03-18|Sowind S.A.|Exhaust mechanism with bistable leaf spring|EP1710636A1|2005-04-06|2006-10-11|Daniel Rochat|Escapement for a watch|
    EP2553533B2|2010-04-01|2019-06-19|Rolex S.A.|Device for locking a toothed wheel|EP3273308B1|2016-07-18|2019-06-12|Sowind S.A.|Exhaust mechanism|
    法律状态:
    2016-12-15| PFA| Name/firm changed|Owner name: SOWIND S.A., CH Free format text: FORMER OWNER: SOWIND S.A., CH |
    2019-06-14| NV| New agent|Representative=s name: BOVARD SA NEUCHATEL CONSEILS EN PROPRIETE INTE, CH |
    优先权:
    申请号 | 申请日 | 专利标题
    CH00116/15A|CH710685B1|2015-01-30|2015-01-30|Escape mechanism.|
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