• 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 invention relates to a winding system arranged for the winding of a motor spring of a timepiece, said winding system comprising a latching system comprising a first mobile (10) and a second mobile (14) mounted coaxially rotated relative to each other, the first mobile (10) and the second mobile (14) being one integral with a hub and the other secured to a wheel (16), the one of the first mobile (10) and the second mobile (14) being intended to be driven by a winding member, the other of the first mobile (10) and the second mobile (14) being intended to remount said motor spring wherein one of the first movable (10) and the second movable (14) has a unidirectional drive toothing (32), and the other of the first movable (10) and the second movable (14) comprises a pawl (40) associated with a spring (42). According to a first aspect of the invention, the spring (42) and the pawl (40) form a rigid connection between the first mobile (10) and the second mobile (14) in a latching state, and an elastic connection between the first mobile (10) and the second mobile (14) in a state of unclipping. According to a second aspect of the invention, the pawl (40), the spring (42) and that of the first mobile (10) and the second mobile (14) which comprises the pawl, are monolithic.
    公开号:CH713407A2
    申请号:CH01488/17
    申请日:2017-12-07
    公开日:2018-07-31
    发明作者:Cornibe Sylvain
    申请人:Richemont Int Sa；
    IPC主号:
    专利说明:

    Description
    Technical Field [0001] The present invention relates to the field of watchmaking. It relates, more particularly, a winding system for a timepiece having a particular latching system. The latter comprises a first mobile and a second mobile mounted coaxially rotated relative to each other. The first mobile and the second mobile being one secured to a hub and the other secured to a wheel.
    [0002] Such snap-fastening systems are commonly used in watchmaking, to produce unidirectional drive systems, clutches or torque limiting drive systems in the context of a winding kinematic chain. a motor spring.
    In known systems, one of the first mobile and the second mobile comprises a unidirectional drive toothing, and the other of the first mobile and the second mobile comprises a pawl associated with a spring. The pawl is arranged to cooperate with the unidirectional drive gear to integrally link in rotation the first mobile and the second mobile when they pivot one relative to the other in a first direction of rotation, defining a latching state , and to free rotate the first mobile relative to the second mobile when they pivot relative to each other in a second direction of rotation, defining a declutching state.
    According to the configurations, the wheel or the hub may be motor, that is to say be driven by a winding rod or an oscillating weight, to drive in one direction the other mobile.
    STATE OF THE ART [0005] In the state of the art, various alternative constructions are known for producing such a mechanism. In general, it is extremely difficult to obtain a system that allows both to transmit large torques, without having strong springs and, as a result, induce significant friction during unclipping. This friction generates wear, noise and, depending on the application of the system, a loss of efficiency.
    For this purpose, the patent CH 705 322 proposes to use pawls, integral with their respective spring, housed in an appropriate opening of the wheel and cooperating with an external toothing formed on the hub. Each pawl has several teeth cooperating with corresponding teeth of the hub, which allows to generate a significant friction and thus to transmit a high torque. When unclipping, only one of the teeth of the pawl is in contact with the toothing, which reduces friction during unclipping. However, this solution requires keeping the pawls in their housing by flanges on either side of the hub. In addition, the springs of the pawls are biased both during the latching and unclipping and it remains difficult to separate the adjustment forces involved in the two directions of rotation. This document explicitly mentions the use of such a drive system in the context of winding a barrel spring by means of a hinge hinge of a portable electronic device.
    [0007] Patent DE 1 922 475 also proposes a construction in which the wheel of the drive system is secured to the pawl by means of an elastic blade. As previously, this solution implies that the transmissible force between the hub and the wheel depends on the characteristics of the elastic blade. It is the same for the unclipping.
    In general, there is an important correlation between the transmissible forces and unclamping efforts. Such a result can not be suitable in particular for an automatic winding driven by an oscillating mass, since the energy losses and resistance to unclipping imply too low efficiency.
    The present invention aims to provide a winding system provided with a latching system free of the above disadvantages and to separate the transmissible forces and unclamping efforts, thus improving the performance of the winding system . It is thus possible to obtain an ability to transmit large torques in the winding system, while limiting the forces and other energy losses during unclipping.
    Disclosure of the invention [0010] More specifically, the invention relates to a winding system arranged for the winding of a motor spring of a timepiece. This winding system comprises a latching system comprising a first mobile and a second mobile mounted coaxially to rotate relative to each other, the first mobile and the second mobile being one integral with a hub and the other integral with a wheel, one of the first mobile and the second mobile being intended to be driven by a winding member such as a winding stem, an oscillating weight or the like, the other of the first mobile and the second mobile being intended to remount said motor spring being kinematically connected with the latter, wherein one of the first mobile and the second mobile comprises a unidirectional drive gear, and the other of the first mobile and the second mobile comprises a pawl associated with a spring, the pawl being arranged to cooperate with the unidirectional drive gear to integrally rotate the first gear; mobile er and the second mobile when they pivot one relative to the other in a first direction of rotation, defining a latching state, and to let the first mobile in rotation relative to the second mobile when they rotate relative to each other in a second direction of rotation, defining a declutching state.
    According to a first aspect of the invention, the latching system is arranged so that the spring and the pawl form a rigid connection between the first mobile and the second mobile in the latching state, and an elastic connection between the first mobile and the second mobile in the unclipped state.
    According to another aspect of the invention, the ratchet, the spring and that of the first mobile and the second mobile which comprises the pawl, are monolithic.
    BRIEF DESCRIPTION OF THE DRAWINGS [0013] Other details of the invention will appear more clearly on reading the description which follows, made with reference to the appended drawing in which: FIG. 1 and FIG. 2 are respectively top views in perspective, and in section, of a latching system suitable for a winding system according to the invention, FIGS. 3, 4 and 5 show different variants of spring 42 and ratchet which can be implemented in such a latching system, and FIGS. 6 and 7 illustrate the integration of such a latching system in a barrel.
    Embodiment of the invention [0014] FIGS. 1 to 5 an embodiment of a latching system adapted to a winding system according to the invention. This system is intended to take place in a winding kinematic chain kinematically connecting a winding member, such as a winding stem, an oscillating mass or the like, to a motor spring so as to be able to wind it up under the effect of the winding member. The ratchet system may in principle be located anywhere in such a kinematic chain, but may in particular be integrated in a barrel system housing said mainspring, as will be described below in the context of FIGS. 6 and 7.
    In this embodiment, there is a first mobile 10 secured to a hub 12, and a second mobile 14 secured to (or comprising) a wheel 16. The first mobile 10 and the second mobile 14 are mounted coaxially, movable in rotation relative to each other. Those skilled in the art will have no difficulty in adapting the present description to an embodiment in which the construction would be reversed, that is to say in which the first mobile 10 would be secured to a wheel 16 and the second movable 14 secured to a hub 12. One of the first mobile 10 and the second mobile 14 may be configured as input of the latching device, intended to be rotated by a winding member such as a rod of winding arranged to be manually operated or an oscillating mass. The other can be configured as an output, and is therefore intended to remount a motor spring, such as a spring housed in a barrel. The skilled person knows how to provide kinematic links upstream and downstream of the latching device in order to bind the latter on the one hand with the winding member, on the other hand with the mainspring. Therefore, these kinematic links and the winding members should not be described in detail here.
    More particularly, in this embodiment, the first mobile 10 has a central opening 18. The hub 12 comprises a board 20 which has concentric portions of different heights. The board 20 thus defines a flat bearing 22 at its periphery, the role of which will appear below. The board 20 further comprises a central body 24, forming a circular bearing surface 26 at the interface between the body and the flat seat 22. Finally, in the center of the board 20, an axle 28 allows the rotational mounting of the hub 12, the ends of the axis 28 protruding from either side of the plane of the board 20.
    By its central opening 18, the first mobile 10 is mounted without play on the axis 28 of the hub 12, the side of the flat seat 22. The first mobile 10 is further secured to the hub 12. Various means of fixing are possible, such as a driving on the axis, a collage or other. In the example, the first mobile 10 is screwed onto the body of the board 20. The wheel 16 is guided in rotation on the circular seat 26 and is positioned in height between the flat bearing 22 that includes the hub 12, and the first 10. The wheel 16 has a circular groove 30 whose outer diameter is greater than the diameter of the first mobile 10. The inner diameter of the groove 30 may be substantially equal to the diameter of the first mobile 10. The second mobile 14 is disposed in the groove 30, integrally with the wheel 16. The second mobile 14 takes the form of a ring, provided with an internal toothing 32 located at least partially in the plane of the first mobile 10. The internal gear 32 is of type gearing 32 unidirectional drive, such as teeth with wolf teeth for example. This type of toothing 32 is generally asymmetrical and is provided to allow a drive in one direction and a disengagement in the other direction of rotation, as will be better understood hereinafter.
    The first mobile 10 comprises a pawl 40 associated with a spring 42, the pawl 40 being arranged to cooperate with the toothing 32 unidirectional drive. More particularly, the pawl 40 is mounted on the mobile. It comprises a spout 44 arranged to cooperate with the unidirectional drive gear 32, the spout 44 being shaped so as to bind the first moving part 10 and the second moving part 14 in rotation when they pivot relative to each other in a first direction of rotation.
    [0019] Referring to FIG. 1, if the first mobile 10 is driven by the hub 12 in the opposite direction of the clockwise, it drives the second mobile 14. This defines a latching state. This is also defined by a motor drive of the second mobile 14 in the direction of clockwise, which also allows to drive in rotation the first mobile 10.
    The spout 44 is also arranged to leave free rotation of the first mobile 10 relative to the second mobile 14 when they rotate relative to each other in a second direction of rotation. With reference to FIG. 1, if the first mobile 10 is driven by the hub 12 in the direction of clockwise, it rotates without driving the second mobile 14, the pawl 40 moving by constraining the spring 42. This defines a state of unclipping . This is also defined during a motor drive of the second mobile 14 in the counterclockwise direction, which is also performed without rotating the first mobile 10.
    Advantageously and according to a first aspect of the invention, the first mobile 10, the pawl 40 and the spring 42 are monolithic and come from a room. They can be made monolithically, by DRIE type engraving techniques, or LIGA type growth. Thus, the first mobile 10, the pawl 40 and the spring 42 are arranged in the same plane, this plane being at least partially located in the plane of the unidirectional drive toothing 32 of the second mobile 14, to allow the cooperation of the beak 44 of the pawl 40 with this toothing 32. By multilevel manufacturing techniques, the spring 42 and the pawl 40 may have different thicknesses, allowing for example a good mechanical strength for the pawl 40 and a low stiffness coefficient for the spring 42, making a ratchet 40 thicker than the spring 42. This provides a very advantageous construction, easy to mount and space-saving, requiring no plate to hold the pawl or the spring in its teeth.
    In the preferred embodiment, proposed as an illustrative example of the invention, the first mobile 10 has a lateral cut 46, comprising an opening in a circular arc 48 opening laterally opposite the teeth 32 unidirectional drive. The pawl 40 has a circular base 50 of diameter slightly smaller than the diameter of the circular opening 48. The base 50 is housed in the circular opening 48 which forms a seat for the base 50 of the pawl 40, which is pivotable in reference to the center of the seat, but also to bear against the walls of the seat. The wall of the circular opening 48 is thus arranged to form a stop of the base of the pawl 40.
    The spring 42 is arranged to exert on the pawl 40 a force which tends to keep engaged in the teeth 32 unidirectional drive, exerting a torque tending to put the base of the pawl 40 in rotation in the opening.
    The spring 42 is preferably of the blade type, formed directly in the thickness of the first mobile 10. It connects the first mobile 10 and the pawl 40, extending into the space left free by the side cutout. It is attached to the pawl 40 by the edge of the arm formed between the base 50 and the spout 44. Thus, a rotation of the pawl 40 with reference to the center of the circular opening 48, causes an elastic deformation of the spring 42.
    According to a second aspect of the invention which is independent of the first aspect mentioned above, the latching system is arranged so that the spring 42 and the pawl 40 form a rigid connection between the first mobile 10 and the second one. mobile 14 in the latching state, and an elastic connection between the first mobile 10 and the second mobile 14 in the unclamping state.
    By rigid connection is meant a substantially rigid connection, or even exclusively rigid, that is to say which solicits only very little, if any, the spring 42 of the pawl 40. By elastic connection, we mean a linkage which causes elastic deformation of the spring member 42.
    More specifically, the pawl 40 is arranged so that the moment of force exerted on the pawl 40 about its axis of rotation, by the action of the unidirectional drive gear 32, when it is in the latching state, is zero or substantially zero. To do this, the skilled person can act on the geometries of the beaks of the pawl 40 and the unidirectional drive gear 32, as well as on their respective positioning.
    The pawl 40 is further arranged so that, in the latching state, the force exerted by the unidirectional drive gear 32 on the pawl 40 or the resultant of these forces, has an orientation essentially , preferably exclusively, radial tending to press the base of the pawl 40 against the wall of the seat, without the pawl 40 rotating. In this case, with reference to FIG. 2, the support of a first tooth of the unidirectional drive toothing 32 on the flank 44a of the spout 44 causes a counter-support of the sidewall 44b on the adjacent tooth. The resultant of these forces passes through the axis of rotation of the pawl and the torque that it exerts is zero.
    Thus, since the latching system is arranged to avoid, in any case minimize the rotation of the pawl 40 when in the latched state, the deformation of the spring 42 is also minimized.
    Different forms of spring 42 may be provided to obtain the same orientations of the elastic forces. Figs. 3, 4 and 5 provide different examples.
    In FIG. 3, as in figs. 1 and 2, the spring 42 forms a bend from the edge of the side cut 46, then forms several meanders before reaching the edge of the pawl arm 40.
    In FIG. 4, the lateral cut extends beyond the level of the circular opening 48, forming a slot 52 in the first mobile. The spring 42 is connected by one of its ends, with this slot, before joining the rim of the arm of the pawl 40, by several meanders, similar to those of FIG. 3.
    In FIG. 5, the side cut opens a band 54 between the center of the first mobile and its periphery which comprises the circular opening 48. The spring 42 is connected by one of its ends with the end of the strip. It forms a single bend before connecting with the pawl, at the base of spout 44.
    Thus and particularly advantageously, the spring 42 is not biased during the latching phases. The driving of the mobile led by the driving mobile is done with very little play, the minimum clearance between the base of the ratchet 40 and its seat. This drive is done by a rigid connection, which also allows to transmit large torques. Above all, since the spring 42 does not intervene in this phase, it can be dimensioned freely for the unclamping phases and be very light, thus limiting the constraints during the passage of the pawl 40. It is perfectly possible to separate the dimensioning and the adjustment of the elements involved during snapping and unclipping.
    If the embodiment mainly illustrated proposes to have the first mobile 10 which carries the pawl 40, as mentioned above, the skilled person may consider different combinations. For example, one could have the pawl 40 on the mobile which is secured to the wheel 16, in this case the second mobile 14. The unidirectional drive gear 32 is then disposed on the mobile integral with the hub 12, in the species the first mobile 10.
    In both cases, it can be envisaged to have unidirectional drive teeth 32 which are internal or external teeth 32, even if certain configurations can be complex.
    In all configurations, one or the other of the mobile can be the moving mobile, that is to say receiving the torque to be transmitted, the other mobile being the mobile led, during phases of snap. In addition, the latching system may comprise a plurality of spring-ratchet assemblies which are distributed angularly about the axis 28. In this case, the pawls 40, the springs 42 and the first or the second mobile are all monolithic. and come in one piece according to the first aspect of the invention.
    Thus is proposed a particularly effective latching system, both in terms of size, the torque that it is capable of transmitting, as the dissociation of the latching and unclipping functions, which allow to size the spring member 42 only considering the unclipping. The wear and friction constraints during unclipping are thus reduced compared to the devices of the prior art.
    Figs. 6 and 7 illustrate in isometric view as well as in diametral section along the axis A-A, a barrel system 60 incorporating a latching system of the type described above, in particular that illustrated in FIGS. 1 and 2.
    The barrel 60 comprises a drum 61 provided with a first outer toothing 62 for driving a watch movement (not shown). Inside the drum 61 is housed a motor spring 63, whose outer end is connected to the drum 61, and whose inner end is connected to the barrel shaft 64 via a bung.
    The shaft 64 is free to pivot relative to the drum, and carries, on a first face of the drum 61, a latching system as described above. In the variant shown, the first mobile 10 of the latching system is rotationally integral with a square 64a (or other appropriate form) that includes the shaft 64, this square 64a taking place in the central opening 18 of the first mobile 10. This central opening 18 is of complementary shape to the square 64a to make these two elements mutually integral in rotation.
    The first mobile 10 comprises two pawls 40, diametrically opposed with respect to each other, each being similar to that of FIGS. 1 and 2, but they may be substituted by those of the other figures mentioned above. Therefore, these pawls 40 need not be described in detail again.
    The second mobile 14, carrier of the toothing 32, is again disposed in a groove 30 which is provided with the wheel 16. The diameter of the latter is identical to that of the toothing 62 of the drum 61, but other diameters are possible.
    The second wheel 16 serves as an input, and is intended to be driven by a winding member (not shown) such as a winding stem or an oscillating weight, through a cog and / or an ad hoc conversion mechanism as generally known to those skilled in the art.
    When the second wheel is rotated clockwise (relative to FIG 6) by the winding member, the pawls 40 are driven by the toothing 32, and this rotation is transmitted to the shaft 64. The motor spring 63 is thus reassembled. On the other hand, when the second wheel 16 rotates in the opposite direction, the pawls 40 rise as described above, disengage the toothing 32 and the shaft 64 is not rotated.
    It goes without saying that other configurations of latching systems as defined above can be used for the same purpose.
    It is also noted that the cylinder 60 illustrated in FIGS. 6 and 7 further comprises a second output, including an additional wheel 65 located on the other side of the drum 61 than that where the latching system is. This additional wheel may cause an input of a power reserve system, or may result in a device
    权利要求:
    Claims (16)
    [1]
    additional such that a ringing device independently of the drum 61 of the barrel 60 as well as the gear train of the movement (not shown). The skilled person may still consider other alternatives from the description given above by way of non-limiting illustration of the invention, without departing from the scope of protection defined by the claims. Particularly, the ratchet system can also be used as an automatic reverser, i.e. to convert rotations of the oscillating mass in both directions, into a unidirectional rotation of the cylinder head. Different types of inverters with latching systems working in opposition are known to those skilled in the art. The one described above allows a clear improvement in efficiency, because the springs can be dimensioned slightly in their unclamping component. One or more snap-in systems as proposed above can therefore be adapted in an automatic inverter. In the examples proposed above, the latching system being kinematically in the kinematic chain extending between the winding member and the shaft 64 of the cylinder 60, it is obviously part of the winding device. arranged to refit the spring 63. Claims
    1. Winding system arranged for the winding of a motor spring (63) of a timepiece, said winding system comprising a latching system comprising a first mobile (10) and a second mobile (14) mounted coaxially with rotation relative to one another, the first mobile (10) and the second mobile (14) being one integral with a hub (12) and the other secured to a wheel (16) , one of the first mobile (10) and the second mobile (14) being intended to be driven by a winding member, the other of the first mobile (10) and the second mobile (14) being intended to go up said mainspring (63), wherein one of the first movable (10) and the second movable (14) has a one-way drive toothing (32), and the other of the first movable (10) and the second mobile (14) comprises a pawl (40) associated with a spring (42), the pawl (40) being arranged to cooperate with each other; c the unidirectional drive toothing (32) for integrally connecting the first mobile (10) and the second mobile (14) in rotation when they pivot relative to each other in a first direction of rotation, defining a state latching, and to allow free rotation of the first mobile (10) relative to the second mobile (14) when they pivot relative to each other in a second direction of rotation, defining a decluttering state, characterized in that it is arranged in such a way that the spring (42) and the pawl (40) form a rigid connection between the first mobile (10) and the second mobile (14) in the latched state, and an elastic connection between the first mobile (10) and the second mobile (14) in the unlocked state. 2. A winding system according to claim 1, characterized in that the pawl (40) is pivotally mounted on its mobile according to an axis of rotation and in that the pawl (40) is arranged so that the moment force exerted on the pawl (40) along its axis of rotation, by the action of the other mobile when it is in the latching state, is zero or substantially zero.
    [3]
    3. Winding system according to one of claims 1 and 2, characterized in that it is arranged to minimize the deformation of the spring (42) when in the latching state.
    [4]
    4. Winding system according to one of the preceding claims, characterized in that the mobile comprising the pawl (40), said pawl (40) and said spring (42) are monolithic.
    [5]
    5. Winding system according to one of the preceding claims, characterized in that the mobile comprising the pawl (40), said pawl (40) and said spring (42) are arranged in the same plane.
    [6]
    6. Winding system according to claim 5, characterized in that the mobile comprising the pawl (40), has a circular opening opening laterally, the pawl (40) having a circular base of diameter less than the diameter of said opening, said base being housed in said opening, and in that the wall of the opening forms a stop of the base in the latching state.
    [7]
    7. Winding system according to one of the preceding claims, characterized in that the mobile comprising the pawl (40) is that of the first and second movable (14) which is integral with a hub (12), and in that that the mobile having the unidirectional drive toothing (32) is that of the first and second movable (14) which is integral with the wheel (16).
    [8]
    8. Winding system according to one of claims 1 to 6, characterized in that the mobile comprising the pawl (40) is that of the first and second movable (14) which is integral with the wheel (16), and that the mobile having the unidirectional drive toothing (32) is that of the first and second movable (14) which is integral with the hub (12).
    [9]
    9. Winding system according to one of claims 7 and 8, characterized in that the unidirectional drive toothing (32) is an internal toothing (32).
    [10]
    10. A winding system according to one of claims 7 and 8, characterized in that the unidirectional drive toothing (32) is an external toothing (32).
    [11]
    11. A winding system according to claim 7 and claim 9, characterized in that the wheel (16) is guided in rotation on a circular bearing surface (26) which comprises the hub (12) and positioned in height between a flat bearing ( 22) that comprises the hub (12), and the mobile comprising the pawl (40).
    [12]
    12. Winding system arranged for the winding of a motor spring (63) of a timepiece, said winding system comprising a latching system comprising a first mobile (10) and a second mobile (14) mounted coaxially with rotation relative to one another, the first mobile (10) and the second mobile (14) being one integral with a hub (12) and the other secured to a wheel (16) , or respectively one secured to a wheel (16) and the other secured to a hub (12), one of the first mobile (10) and the second mobile (14) being intended to be driven by a winding member, the other one of the first mobile (10) and the second mobile (14) being intended to remount said motor spring (63), in which one of the first mobile (10) and the second mobile ( 14) has a unidirectional drive toothing (32), and the other of the first mobile (10) and the second mobile (14) comprises a pawl (40) associated with a spring (42), the pawl (40) being arranged to cooperate with the unidirectional drive toothing (32) for integrally linking the first mobile (10) and the second mobile (14) in rotation when they pivot relative to each other in a first direction of rotation, defining a latching state, and to free rotate the first movable (10) relative to the second movable (14) when they rotate one relative to the other in a second direction of rotation, defining a state of unclipping, characterized in that the pawl (40), the spring (42) and that of the first mobile (10) and the second mobile (14). ) which includes the ratchet, are monolithic.
    [13]
    13. A winding system according to claim 12, characterized in that the pawl (40), the spring (42) and that of the first mobile (10) and the second mobile (14) which comprises the pawl, are arranged in the same plan.
    [14]
    14. Winding system according to one of the preceding claims, wherein said latching system is mounted on a cylinder (60) comprising a drum (61) housing said motor spring (63) and a barrel shaft (64). ) at which an inner end of said motor spring (63) is attached.
    [15]
    15. Winding system according to the preceding claim, wherein said latching system is carried by said barrel shaft (64).
    [16]
    16. A winding system according to the preceding claim, wherein said first mobile (10) is rotatably connected to said barrel shaft (64), said second mobile (14) being intended to be driven by said winding member.
    [17]
    17. Winding system according to the preceding claim, wherein said second mobile (14) comprises said unidirectional drive gear (32).
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    同族专利:
    公开号 | 公开日
    CH713407B1|2022-01-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH1012017|2017-01-30|
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