• 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:
    One aim is to propose a barrel drum assembly, a movement and a timepiece whose disassembly for maintenance is facilitated and which are thinner while being such that a sliding of the ratchet is prevented. A barrel drum assembly (17) includes: a barrel (28) which contains a barrel spring (80) therein, to which one end of the barrel spring (80) is attached and which rotates on an axis (O1) by disarming the barrel spring (80); a hollow barrel shaft (50) which is arranged coaxially with the axis (O1) and carries the barrel (28) in rotation relative to it, and to which the other end of the barrel spring (80) is attached; a ratchet shaft (60) which includes an upper pivot (61) and a lower pivot (62), and which is inserted inside the barrel shaft (50) so as to be arranged coaxially with the axis (O1); a ratchet (27) arranged coaxially with the axis (O1), between the upper pivot (61) and the lower pivot (62); and a relative rotation prohibition part such as flats (57 and 72) preventing relative rotation between the barrel shaft (50) and the ratchet (27), by engagement.
    公开号:CH715054A2
    申请号:CH00784/19
    申请日:2019-06-11
    公开日:2019-12-13
    发明作者:Fujieda Hisashi；Ito Kengo
    申请人:Seiko Instr Inc；
    IPC主号:
    专利说明:

    Description
    BACKGROUND OF THE INVENTION
    1. Field of the invention The present invention relates to a barrel drum assembly, a movement and a timepiece.
    2. Description of the prior art relating [0002] In the prior art, the movement of a mechanical timepiece comprises a barrel in which an energy storage barrel spring is housed, a barrel shaft carrying rotatably the barrel as well as a ratchet fixed to the barrel shaft and intended to arm the barrel spring (for example, see patent document 1 and patent document 2).
    JP-A-2012-32 299 (patent document 1) describes a timepiece movement comprising a barrel disposed between a plate and a barrel bridge, a barrel spring body disposed inside the barrel and secured to an internal peripheral surface of the barrel by an external peripheral end, a barrel shaft which is rotatably supported by the plate and the barrel bridge and to which an internal peripheral end of the barrel spring body is attached, thus a ratchet attached to a projecting end of the barrel shaft by a ratchet screw on a side opposite the barrel, with the barrel bridge interposed between.
    JP-T-2014-526 688 (patent document 2) describes a barrel drum assembly of a timepiece comprising a barrel shaft rotatably mounted on an axis, in which the barrel shaft s extends between a first shoulder provided to guide a pivoting movement of the barrel shaft at the level of a bridge and a second shoulder provided to guide a pivoting movement of the barrel shaft at the level of a plate, if although the first end is provided on the first shoulder and the second end is provided on the second shoulder, while the barrel shaft includes an intermediate shoulder in which a core is fitted between the first shoulder and the second shoulder, the barrel drum assembly comprising a barrel spring, the barrel spring being disposed between a barrel drum pivotally mounted on the shaft and a core receiving surface so that q ua first external end is provided on the barrel drum and a second internal end is provided on the receiving surface, while the barrel shaft comprises a ratchet support comprising a shoulder for adjusting or fixing the ratchet integrally with the barrel shaft between the first shoulder and the core.
    However, in the technique described in patent document 1, since the barrel bridge is arranged between the barrel and the ratchet, it is necessary to provide a space both between the barrel and the barrel bridge, and between the ratchet and the barrel bridge. Therefore, the distance between the barrel and the ratchet is increased and the movement can be thick. In addition, in the technique described in patent document 2, there is no structure to prevent relative sliding between the barrel shaft and the core, or no structure to limit relative sliding between the barrel shaft and ratchet support. As a result, sliding between the ratchet and core elements occurs, so that the ratchet and the core are moved relatively to each other, and damage such as deterioration of the gear meshing may occur. In addition, in order to improve the ability to be maintained (the ability to be maintained) of the movement, it is necessary to be able to dissociate the barrel and the ratchet. However, if the elements are firmly fixed to each other so as not to allow sliding to occur between the ratchet and the core, the elements tend to be damaged during disassembly. Therefore, it is necessary to prevent the ratchet from sliding while allowing the barrel and the ratchet to be dissociated.
    SUMMARY OF THE INVENTION One aspect of the present application is to propose a barrel drum assembly, a movement and a timepiece whose capacity to be maintained in condition (possibility of carrying out maintenance) either improved and which are thinned while being such as to prevent sliding of the ratchet.
    A barrel drum assembly according to one aspect of the present application comprises a barrel which contains a barrel spring inside it, to which one end of the barrel spring is attached and which rotates on an axis by a disarming the barrel spring; a hollow barrel shaft which is arranged coaxially with the axis and carries the barrel rotatably relative to it, and to which the other end of the barrel spring is attached; a ratchet shaft which comprises an upper pivot and a lower pivot, and which is inserted inside the barrel shaft so as to be arranged coaxially with the axis; a ratchet arranged coaxially with the axis, between the upper pivot and the lower pivot; and a relative rotation prohibition portion (relative rotation prohibition means) preventing, directly or indirectly, relative rotation between the barrel shaft and the ratchet, by engagement.
    According to the aspect of the present application, since the ratchet shaft is inserted inside the barrel shaft, the barrel shaft and the barrel carried by the barrel shaft are arranged between the upper pivot and lower pivot of the ratchet shaft. In addition, as the ratchet is also disposed between the upper pivot and the lower pivot of the ratchet shaft, the ratchet and the barrel are disposed between a member pivotally retaining the upper pivot and a retaining member
    CH 715 054 A2 the lower pivot pivotally. Consequently, the space between the ratchet and the barrel can be reduced, compared to the case where a bridge is arranged between the ratchet and the barrel as in the related prior art. Therefore, it is possible to make the barrel drum assembly thin.
    In addition, since a rotation of the barrel shaft and the ratchet relative to each other is prevented by engagement (by the coupling), the ratchet and the barrel supported by the 'barrel shaft can be easily dissociated, compared to the case of a constitution in which rotation of the barrel shaft and the ratchet relative to each other is prevented by friction such as driving. Therefore, it is possible to provide a barrel drum assembly whose ability to be maintained in an improved state, while preventing sliding of the ratchet relative to the barrel shaft can occur.
    Preferably, in the barrel drum assembly, an insertion part into which the barrel shaft is inserted is formed in the ratchet and the ratchet is engaged with the barrel shaft in a circumferential direction around the axis.
    According to the aspect of the present application, a relative rotation between the ratchet and the barrel shaft inserted in the insertion part of the ratchet can be prevented other than by friction. Therefore, the assembly can be done in such a way that the ratchet can be removed from the barrel shaft. Consequently, the ratchet and the barrel supported by the barrel shaft can be easily dissociated. Therefore, it is possible to provide a barrel drum assembly whose ability to be maintained in condition is improved.
    Preferably, in the barrel drum assembly, the ratchet shaft comprises a projecting part, projecting in a direction orthogonal to the axis, and the ratchet is in contact with the projecting part at least three points distributed around the axis when looking in the axial direction of the axis.
    According to the aspect of the present application, an inclination of the ratchet from the state in which this ratchet is arranged coaxially with the axis can be prevented by the projecting part. Therefore, as an inclination of the ratchet and contact of this ratchet with the barrel or an element pivotally retaining the ratchet shaft is prevented, it is possible to further decrease the space between the ratchet and the barrel, as well as the space between the ratchet and the element holding the ratchet shaft pivotally. Therefore, it is possible to make the barrel drum assembly thin.
    In addition, an increase in the rotational load (of the torque to be produced) resulting from contact with the ratchet can be avoided.
    [0016] Preferably, in the barrel drum assembly, the ratchet is sandwiched between the projecting part and the barrel shaft.
    According to the aspect of the present application, by the projecting part and the barrel shaft, one can limit the displacement of the ratchet in the vertical direction. Consequently, since it prevents the ratchet from touching the barrel or the element retaining the ratchet shaft pivotally, it is possible to further reduce the space between the ratchet and the barrel, as well as the space between the ratchet and the element retaining the ratchet shaft pivotally. Therefore, it is possible to make the barrel drum assembly thin.
    In addition, it is possible to avoid an increase in the rotational load (of the torque to be produced) resulting from contact with the ratchet.
    Preferably, in the barrel drum assembly, the ratchet shaft is screwed into the barrel shaft.
    According to the aspect of the present application, the barrel shaft is firmly fixed to the ratchet shaft. Therefore, it is possible to prevent an inclination of the barrel from the state where the barrel is arranged coaxially with the axis to occur by displacement of the barrel, supported by the barrel shaft, relative to the ratchet tree. Therefore, as tilting of the barrel and contact of this barrel with the pivotally retaining member of the ratchet can be prevented, the space between the barrel and the retaining member of the shaft can be further reduced. swivel ratchet. Therefore, it is possible to make the barrel drum assembly thin.
    In addition, it is possible to avoid an increase in the rotational load (of the torque to be produced) resulting from contact with the ratchet.
    In addition, the ratchet shaft and the barrel shaft can be easily dissociated. Therefore, it is possible to provide a barrel drum assembly whose ability to be maintained in condition is improved.
    Preferably, in the barrel drum assembly, the ratchet shaft includes an adjustment portion fitted on or in the barrel shaft.
    According to the aspect of the present application, it is possible to maintain a state in which the barrel shaft and the ratchet shaft are coaxial by an adjustment between the barrel shaft and the adjustment portion. Consequently, it is possible to prevent a defect in coaxiality between the barrel shaft and the ratchet shaft resulting from poor centering, during manufacture, (eccentricity) of a threading of the barrel and male thread of the ratchet shaft. Therefore, it is possible to propose the barrel drum assembly assembled with high precision.
    Preferably, in the barrel drum assembly, the ratchet shaft is driven into the barrel shaft.
    CH 715 054 A2 [0026] According to the aspect of the present application, the barrel shaft is firmly fixed to the ratchet shaft. Therefore, it is possible to prevent an inclination of the barrel relative to the state where the barrel is arranged coaxially with Taxe to occur by displacement of the barrel supported by the barrel shaft relative to the shaft ratchet. Consequently, since an inclination of the barrel and a contact of this barrel with the element retaining the ratchet shaft pivotally can be prevented, it is possible to further reduce the space between the barrel and the element retaining the shaft swivel ratchet. Therefore, it is possible to make the barrel drum assembly thin.
    In addition, it can be avoided that an increase in the rotating load (of the torque to be produced) results from contact with the barrel 28.
    In addition, the ratchet shaft and the barrel shaft can be easily dissociated. Therefore, it is possible to provide the barrel drum assembly which is such that its ability to be maintained in condition is improved.
    Preferably, in the barrel drum assembly, a penetrating through hole in the axial direction is formed in the ratchet shaft, in a position overlapping the barrel shaft and / or the ratchet when viewed in the axial direction of the axis. (Preferably, in the barrel drum assembly, a through hole penetrating in the axial direction is formed in the ratchet shaft, in a position superimposed on the barrel shaft and / or the ratchet when viewed from the axial direction of the axis.) According to the aspect of the present application, the barrel shaft and / or the ratchet is pressed while passing through the through hole, so that the barrel shaft or the ratchet can be moved in the axial direction of the axis, relative to the ratchet shaft. Therefore, the barrel shaft or ratchet and the ratchet tree can be easily dissociated. Therefore, it is possible to provide the barrel drum assembly which is such that its ability to be maintained in condition is improved.
    A movement according to the aspect of the present application comprises a barrel drum assembly as defined above.
    A timepiece according to the aspect of the present application comprises a movement as defined above.
    According to the aspect of the present application, it is possible to propose the movement and the timepiece which are thin and which have an excellent capacity to be maintained in condition (to be maintained).
    According to the aspect of the present application, it is possible to propose a barrel drum assembly, a movement and a timepiece whose capacity to be maintained in state (the capacity to be maintained) is improved and which are thinned while being such as to prevent sliding of the ratchet.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Fig. 1 is a plan view of a movement according to a first embodiment.
    Fig. 2 is a sectional view of a barrel drum assembly according to the first embodiment.
    Fig. 3 is a plan view showing a ratchet, a barrel and a barrel shaft of the first embodiment.
    Fig. 4 is a sectional view of the barrel drum assembly according to a second embodiment.
    Fig. 5 is a sectional view of a barrel drum assembly according to a third embodiment.
    Fig. 6 is a sectional view of a barrel drum assembly according to a fourth embodiment.
    Fig. 7 is a sectional view taken along the line VII-VII of FIG. 6.
    DESCRIPTION OF THE EMBODIMENTS In the following, we will describe embodiments of the present invention with reference to the drawings. In the description which follows, the same reference numbers are given to constitutions having the same or similar functions. Redundant descriptions of constitutions will be omitted.
    First embodiment In general, a mechanical assembly comprising a drive part of a timepiece is called a "movement". A state in which a dial and hands are subject to movement, put into a timepiece box and made into a finished product is called a "finished" timepiece. Among the two sides of the plate constituting the chassis plate of the timepiece, the side with the crystal of the timepiece case (that is to say the side with the dial) is called the " back side "of the movement. In addition, among the two sides of the plate, the side with the bottom cover of the timepiece box (ie the side opposite the dial) is called the "front side" of the movement.
    CH 715 054 A2 [0038] In addition, in the description given of the embodiment, the direction of the dial towards the case-back cover is the direction from the bottom up, while the opposite direction is defined as being the direction from top to bottom.
    [0039] FIG. 1 is a plan view of the movement according to a first embodiment.
    As shown in fig. 1, a timepiece 1 of this embodiment is a mechanical timepiece and includes a movement 2 and a timepiece case (not shown) receiving this movement 2.
    The timepiece box includes a box bottom cover and a crystal (not shown). There are provided a dial (not shown) having indications to indicate information relating at least to the time it is, and hands (not shown) (i.e. an hour hand to indicate the hours, a minute hand to indicate the minutes and a second hand to indicate the seconds) to show the indications being provided therein.
    The movement 2 comprises a plate 10 forming a chassis plate, a barrel bridge 11, a gear train bridge 12 and a balance bridge 13, these bridges being arranged above the plate 10. A gear train 14, an exhaust 15 controlling the rotation of the finishing train 14 and a regulating member 16 for adjusting the exhaust 15 are arranged mainly between the barrel bridge 11, the train bridge 12, the balance bridge 13 and the plate 10. In addition, the dial (not shown) is arranged on the rear side of the plate 10.
    A winding stem guide hole 20 is formed in the main plate 10, while a winding stem 21 is mounted so as to be rotatable in this winding stem guide hole 20. The winding stem 21 is positioned in an axial direction, by a switching device comprising a zipper 22, a rocker 23, a rocker spring 24 and a zipper jumper 25. In addition, a winding pinion (not shown) is provided rotatable at the level of a portion forming a guide shaft of the winding stem 21.
    When the winding stem 21 is rotated, the winding pinion rotates via the rotation of a clutch wheel (not shown). The winding pinion rotates, so that the crown wheel 26 meshing with it rotates. The crown wheel 26 rotates so that the ratchet 27 meshing with it rotates. The ratchet 27 turns so well that it is armed (wound) with a barrel spring 80 (see fig. 2), which is a source of energy housed in a barrel 28.
    The gear train 14 mainly comprises the barrel 28, a second mobile 30 (center mobile), a third mobile 35 (average mobile) and a fourth mobile 36 (second mobile). The second mobile 30, the third mobile 35 and the fourth mobile 36 rotate as a result of the rotation of the barrel 28 rotating with the elastic return force of the barrel spring 80, which is armed.
    In addition, the second hand rotates as a function of the rotation of the fourth mobile 36 and rotates at a speed of rotation regulated by the exhaust 15 and the regulating member 16, and which is one revolution per minute . The minute hand rotates according to the rotation of the second mobile 30 or the rotation of the road (not shown) rotating according to the rotation of the second mobile 30, and it rotates at a speed regulated by the escapement 15 and the regulating member 16, which is one revolution per hour. The hour hand rotates as a function of the rotation of an hour hand (not shown) rotating through the rotation of the second mobile 30 via a minute wheel (not shown), and it rotates at a speed of rotation regulated by the exhaust 15 and the regulating member 16, and which is one revolution in 12 hours or 24 hours.
    The exhaust 15 comprises an exhaust mobile 37 meshing with the fourth mobile 36 and rotating with the power coming from the barrel spring 80, as well as an anchor 38 regularly leaving the exhaust pinion 37 freeing this exhaust mobile 37, and it controls the train of finishing 14 with the regular time provided by a balance-spring 39.
    The regulating member 16 mainly comprises the balance spring 39 in reciprocating rotation movement (back and forth movement) with a normal amplitude of oscillation as a function of an output torque of the barrel 28 with, as energy source, the barrel spring (not shown).
    The barrel 28 is rotatable on a first axis O1 relative to the plate 10 and the barrel bridge 11. In addition, in a plan view as seen in the direction of the first axis O1, a direction intersecting the first axis O1 is a radial direction and a direction in revolution around the first axis O1 and a circumferential direction. A barrel drum toothing 28a projecting outward in the radial direction is formed around the entire periphery of the barrel 28 in the peripheral direction. The barrel drum toothing 28a meshes with the toothing 31a of a center pinion 31 of the second mobile 30. Consequently, the second mobile 30 rotates on a second axis O2 by the rotation of the barrel 28.
    The ratchet 27 is arranged coaxially with the first axis O1. At the outer periphery of the ratchet 27, a ratchet teeth 27a meshing with the crown wheel 26 is formed around the entire periphery. The ratchet 27 rotates in a first direction of rotation M1, on the first axis O1, by the rotation of the crown wheel 26 so that winding of the barrel spring 80 can be achieved. In addition, the energy accumulated in the barrel spring 80 acts on the ratchet 27 by the elastic return force when the barrel spring 80 disarms, in a second direction of rotation M2 opposite to the first direction of rotation M1.
    CH 715 054 A2 In order to prevent disarming of the barrel spring 80 which is armed, a pawl 90 preventing reverse rotation of the ratchet 27 is engaged with the ratchet 27. The pawl 90 is disposed at a position not overlapping the ratchet 27 in a vertical direction, is pivotally supported, for example by the barrel bridge 11, so as to be tiltable around a third axis 03, and comprises an engagement toothing 90a engaged with the ratchet teeth 27a. When the ratchet 27 turns in the first direction of rotation M1, the pawl 90 is able to tilt from an engagement position (that shown in FIG. 1), in which the engagement teeth 90a is engaged with the ratchet teeth 27a, to a release position in which the engagement between the engagement teeth 90a and the ratchet teeth 27a ceases by rotation in the third direction of rotation M3 around the third axis 03.
    The pawl 90 is returned by a return force of a pawl spring (not shown) to the engagement position, from the release position, around the third axis 03. Consequently, the ratchet 27 is rotatable in the first direction of rotation M1 by going against the return force of the return spring, so that the engagement teeth 90a of the pawl 90 pass the ratchet teeth 27a tooth by tooth.
    The rotation of the pawl 90 in a fourth direction of rotation M4 opposite to the third direction of rotation M3, around the third axis 03, from the engagement position, in which the engagement teeth 90a is engaged with the teeth ratchet 27a, is prevented. Therefore, the ratchet 27 allows rotation in the first direction of rotation M1, but rotation in the second opposite direction of rotation M2 is prevented by the pawl 90. Therefore, as described above, the ratchet 27 is prevented from rotating upside down and only rotation in the first direction of rotation M1 is allowed.
    In what follows, we will describe in detail a barrel drum assembly 17 comprising the barrel 28 and the ratchet 27 described above.
    [0055] FIG. 2 is a sectional view of a barrel drum assembly according to the first embodiment.
    As shown in fig. 2, the barrel drum assembly 17 includes the barrel 28, a barrel shaft 50, a ratchet shaft 60 and the ratchet 27.
    The barrel 28 contains the barrel spring 80 inside of it. The barrel 28 comprises a cylindrical main body of the casing 45, as well as a barrel drum cover 46 for closing the main casing body 45 from above, and receives the barrel spring 80 inside the main casing body 45.
    The main housing body 45 comprises a bottom wall 45a in the form of a disk around the first axis O1, as well as a peripheral wall 45b formed so as to extend upwards along an external peripheral portion. of the bottom wall 45a and surrounding the barrel spring 80 on the outside in the radial direction.
    A first adjustment hole 47 passing vertically through the bottom wall 45a is formed at a central portion of this bottom wall 45a. The barrel drum toothing 28a mentioned above is formed in an outer peripheral portion of the bottom wall 45a. An outer end of the barrel spring 80 is attached to the inner peripheral surface of the bottom wall 45a.
    The barrel drum cover 46 is disc-shaped around the first axis O1 and closes an opening of the peripheral wall 45b within the main housing body 45, from above. An outer peripheral edge of the barrel drum cover 46 fits over an upper end portion of the peripheral wall 45b within the main housing body 45. Therefore, the barrel drum cover 46 and the main body of housing 45 are combined integrally with one another. A second adjustment hole 49 passing vertically through the barrel drum cover 46 is formed at the central portion of the barrel drum cover 46.
    The barrel shaft 50 has a cylindrical shape penetrating vertically. The barrel shaft 50 is arranged coaxially with the first axis O1. The barrel shaft 50 is inserted into the first adjustment hole 47 and into the second adjustment hole 49 of the barrel 28. A thread 51 and an adjustment surface 58 are formed on the inner peripheral surface of the shaft. barrel 50. The internal thread 51 is provided at an intermediate portion vertically on the internal peripheral surface of the barrel shaft 50. The adjustment surface 58 is provided at an upper end of the internal peripheral surface of the barrel shaft 50. The adjustment surface 58 extends in a vertical direction having a constant internal diameter, with the first axis O1 as the central axis. The ratchet shaft 60 is adjusted to reduced clearance on the adjustment surface 58.
    A vertically intermediate portion 52 on the outer peripheral surface of the barrel shaft 50 is swollen outward in a radial direction, from an upper portion and a lower portion of the outer peripheral surface. An inner end of the barrel spring 80 is locked to the vertically intermediate portion 52, at the outer peripheral surface of the barrel shaft 50. The lower portion of the outer peripheral surface of the barrel shaft 50 is adjacent to the vertically intermediate portion 52 on the external peripheral surface, with a first shoulder 53 interposed therebetween. The first shoulder 53 extends along a vertical plane of the first axis O1 and is turned downwards. The upper portion of the outer peripheral surface of the barrel shaft 50 is adjacent to the vertically intermediate portion 52 on the outer peripheral surface with a second shoulder 54 disposed between them. The second shoulder 54 extends along a vertical plane of the first axis O1 and is turned upwards.
    CH 715 054 A2 The first adjustment hole 47 of the barrel 28 is rotatably adjusted on the lower portion of the external peripheral surface of the barrel shaft 50, so as to be rotatable relative to the shaft barrel 50 around the first axis O1. The second adjustment hole 49 of the barrel 28 is adjusted on the upper portion of the external peripheral surface of the barrel shaft 50, so as to be rotatable relative to the barrel shaft 50 around the first axis O1. Consequently, the barrel shaft 50 supports the barrel 28 so that the latter is rotatable relative to it. The inner peripheral portion of the first adjustment hole 47 is opposite the first shoulder 53 of the barrel shaft 50, in close proximity from the bottom. The inner peripheral portion of the second adjustment hole 49 abuts against the second shoulder 54 of the barrel shaft 50 from the top. Consequently, movement of the barrel 28 relative to the barrel shaft 50 in the vertical direction is blocked.
    A third shoulder 55 is formed in the upper portion of the external peripheral surface of the barrel shaft 50. The third shoulder 55 is formed above the barrel 28. The third shoulder 55 has an annular shape coaxial with the first axis O1. The third shoulder 55 extends along a vertical plane of the first axis O1 and is turned upwards. Consequently, at the level of the upper portion of the external peripheral surface of the barrel shaft 50, a portion above the third shoulder 55 is formed so as to have a smaller diameter than that below this third shoulder. 55. In what follows, the portion of the barrel shaft 50 above the third shoulder 55 is called the small diameter portion 56. The small diameter portion 56 is the upper end portion of the barrel 50. A flat part 57 (corresponding to what is called the “relative rotation prohibition part” in the appended claims) is formed at a part of the external peripheral surface of the small diameter portion 56. The flat 57 will be described later.
    The ratchet shaft 60 is a vertically extending tree member. The ratchet shaft 60 is arranged coaxially with the first axis O1. The ratchet shaft 60 is inserted inside the barrel shaft 50. The ratchet shaft 60 comprises an upper stud or upper pivot 61 formed in the upper end portion, a lower stud or lower pivot 62 formed in the lower end portion, a male thread 63 formed between the upper pivot 61 and the lower pivot 62, a flange 64 (corresponding to what is called the "projecting part" in the appended claims) provided between the thread male 63 and the upper pivot 61, as well as an adjustment portion 66 provided between the male thread 63 and the flange 64. The upper pivot 61 projects upwards from the barrel shaft 50. The pivot upper 61 is pivotally supported, directly or indirectly via a bearing, by the barrel bridge 11 (see fig. 1). The lower pivot 62 projects downwards from the barrel shaft 50. The lower pivot is pivotally supported, directly or indirectly via a bearing, by the plate 10 (see fig. 1) below from the barrel shaft 50. The male thread 63 is screwed into the thread 51 of the barrel shaft 50. Consequently, the ratchet shaft 60 is screwed into the barrel shaft 50 and is fixed to this shaft barrel 50.
    The flange 64 projects outwards in the radial direction. The flange 64 extends in an annular shape over the entire periphery of the ratchet shaft 60. The upper face and the lower face of the flange 64 extending respectively along the vertical plane of the first axis O1. An outside diameter of the flange 64 is at least greater than an outside diameter of the upper end portion of the barrel shaft 50. A reentrant, that is to say a hollow or hole 65, which is hollow down, is formed in the upper face of the flange 64. In the embodiment, the hollow or hole 65 passes vertically through the flange 64.
    As shown in fig. 1, several recesses or holes 65 are formed (there are two in the example shown). The recesses or holes 65 are arranged at regular angular intervals in the circumferential direction. The hollow or hole 65 has a circular shape as seen in the vertical direction. When the ratchet shaft 60 is screwed into the barrel shaft 50 (see fig. 2), and when the ratchet shaft 60 and the barrel shaft 50 are dissociated, templates are inserted simultaneously in the recesses or holes 65. Consequently, the ratchet shaft 60 and the jig engage with each other in the circumferential direction and the jig can rotate the ratchet shaft 60.
    As shown in fig. 2, the adjustment portion 66 is adjacent downwardly to the flange 64. The external peripheral surface of the adjustment portion 66 extends in the vertical direction, with a constant outside diameter and with the first axis O1 as the axis central. The adjustment portion 66 is formed so as to have a larger diameter than the adjacent downward portion of this adjustment portion 66 and forming part of the ratchet shaft 60. The adjustment portion 66 is adjusted to reduced clearance at the adjustment surface 58 of the barrel shaft 50.
    A shaft hole 71 (corresponding to what is called the "insertion part" in the appended claims), which is vertically traversing and in which is inserted the small diameter portion 56 of the barrel shaft 50, and formed in the center of the ratchet 27. The ratchet 27 is adjusted externally to the small diameter portion 56 of the barrel shaft 50, from above. The ratchet 27 is disposed between the upper pivot 61 and the lower pivot 62 of the ratchet shaft 60 in the vertical direction. The ratchet 27 is disposed between the barrel 28 and the flange 64 of the ratchet shaft 60. The upper face and the lower face of the ratchet 27 extend respectively along the vertical plane of the first axis O1. The upper face of the ratchet 27 is in plan contact with the lower face of the flange 64 of the ratchet shaft 60. Consequently, the ratchet 27 is in contact with the flange 64 so as to surround the first axis O1. The underside of the ratchet 27 is in plan contact with the third shoulder 55 of the barrel shaft 50. Consequently, the ratchet 27 is sandwiched between the flange 64 of the ratchet shaft 60 and the barrel shaft 50 The lower face of the ratchet 27 is at a distance from the upper face of the barrel 28.
    CH 715 054 A2 [0070] FIG. 3 is a plan view showing the ratchet, the barrel and the barrel shaft of the first embodiment.
    As shown in fig. 3, a flat 72 (corresponding to what is called the "relative rotation prohibition part" in the appended claims) on the internal peripheral surface of the shaft hole 71. The flat 72 of the ratchet 27 and the flat 57 of the 'barrel shaft 50 engage with each other in the circumferential direction. Consequently, the flat 72 of the ratchet 27 and the flat 57 of the barrel shaft 50 prevent the barrel shaft 50 and the ratchet 27 from rotating with respect to each other. In other words, the ratchet 27 is engaged directly with the barrel shaft 50 to prevent relative rotation. In addition, the ratchet 27 is indirectly attached to the ratchet shaft 60 by means of the barrel shaft 50 (see fig. 2).
    As described above, the barrel drum assembly 17 of this embodiment comprises the hollow barrel shaft 50, the ratchet shaft 60 which comprises the upper pivot 61 and the lower pivot 62, and which is inserted inside the barrel shaft 50 so as to be arranged coaxially with the first axis O1, the ratchet 27 arranged coaxially with the first axis O1, between the upper pivot 61 and the lower pivot 62, as well as the flat 57 of the barrel shaft 50 and the flat 72 of the ratchet 27 which directly prevent relative rotation between the barrel shaft 50 and the ratchet 27, by engagement.
    According to this constitution, since the ratchet shaft 60 is inserted inside the barrel shaft 50, the barrel shaft 50 and the barrel 28 carried by the barrel shaft 50 are arranged between the upper pivot 61 and the lower pivot 62 of the ratchet shaft 60. In addition, as the ratchet 27 is also disposed between the upper pivot 61 and the lower pivot 62 of the ratchet shaft 60, the ratchet 27 and the barrel 28 are disposed between the barrel bridge 11 retaining the upper pivot 61 pivotally and the plate 10 retaining the lower pivot 62 pivotally. Consequently, the space between the ratchet 27 and the barrel 28 can be reduced, compared to the case where a bridge is arranged between the ratchet 27 and the barrel as in the prior art relating thereto. Therefore, it is possible to make the barrel drum assembly 17 thin.
    In addition, since a rotation of the barrel shaft 50 and the ratchet 27 relative to each other is prevented by engagement (by coupling), the ratchet 27 and the barrel 28 supported by the barrel shaft 50 can be easily dissociated, compared to the case of a constitution in which rotation of the barrel shaft 50 and of the ratchet 27 relative to each other is prevented by friction such as hunting. Consequently, it is possible to propose a barrel drum assembly 17 whose capacity to be maintained in condition is improved at the same time as a sliding of the ratchet 27 relative to the barrel shaft 50 is prevented.
    In addition, the shaft hole 71 into which the barrel shaft 50 is inserted is formed in the ratchet 27 and this ratchet 27 is coupled with the barrel shaft 50 in the circumferential direction. According to this constitution, relative rotation between the ratchet 27 and the barrel shaft 50 inserted in the shaft hole 71 of the ratchet 27 can be prevented other than by friction. Consequently, the ratchet 27 can be mounted in such a way that this ratchet 27 can be removed from the barrel shaft 50. Consequently, the ratchet 27 and the barrel 28 supported by the barrel shaft 50 can be easily dissociated. Therefore, it is possible to provide a barrel drum assembly 17 whose ability to be maintained in condition is improved.
    In addition, the ratchet shaft 60 comprises the flange 64 projecting in the radial direction orthogonal to the first axis O1, while the ratchet 27 is in contact with this flange 64 so as to surround the first axis O1. According to this constitution, an inclination of the ratchet 27 from the state in which this ratchet 27 is arranged coaxially with the first axis O1 can be prevented by the flange 64. Consequently, an inclination of the ratchet 27 and a contact of this ratchet 27 with the barrel 28 or with the barrel bridge 11 holding the ratchet shaft 60 pivotally are prevented, so that the space between the ratchet 27 and the barrel 28, as well as the space between the ratchet 27 and the barrel bridge 11 can be further reduced. Therefore, it is possible to make the barrel drum assembly 17 thin. In addition, an increase in the rotational load (of the torque to be produced) by contact between the ratchet 27 and the barrel 28 or the barrel bridge 11 can be avoided.
    In addition, if the ratchet 27 is in contact with the flange 64 at at least three points surrounding the first axis O1 as seen in the vertical direction, the effects mentioned above can be obtained.
    In addition, the ratchet 27 can be separated from the barrel 28. According to this constitution, it is possible to prevent contact of the ratchet 27 with the barrel 28. Consequently, an increase in the rotational load (of the torque to be produced) by contact between the ratchet 27 and the barrel 28 can be prevented.
    In addition, the ratchet 27 is sandwiched between the flange 64 and the barrel wheel 50. According to this constitution, a displacement of the ratchet 27 in the vertical direction can be prevented by the flange 64 and the barrel shaft 50 Consequently, contact of the ratchet 27 with the barrel 28 or the barrel bridge 11 pivotally holding the ratchet shaft 60 is prevented, so that the space between the ratchet 27 and the barrel 28, as well as the space between the ratchet 27 and the barrel bridge 11 can be further reduced. Therefore, it is possible to make the barrel drum assembly 17 thin. In addition, an increase in the rotational load (of the torque to be produced) by contact between the ratchet 27 and the barrel 28 or the barrel bridge 11 can be prevented.
    In addition, the ratchet shaft 60 is screwed into the barrel shaft 50. According to this constitution, the barrel shaft 50 is firmly fixed to the ratchet shaft 60. Consequently, it is possible to '' prevent an inclination of the barrel 28 from the state where the barrel 28 is arranged coaxially with the first axis O1 to occur by a displacement of the
    CH 715 054 A2 barrel 28, supported by the barrel shaft 50, with respect to the ratchet shaft 60. Consequently, an inclination of the barrel 28 and a contact of this barrel 28 with the plate 10 retaining the shaft of ratchet 60 pivotally are prevented, so that the space between the barrel 28 and the plate 10 can be further reduced. Therefore, it is possible to make the barrel drum assembly 17 thin. In addition, an increase in the rotational load (of the torque to be produced) by contact between the barrel 28 and the plate 10 can be prevented. Consequently, the ratchet shaft 60 and the barrel shaft 50 can be easily dissociated. Therefore, it is possible to provide a barrel drum assembly 17 whose ability to be maintained in condition is improved.
    In addition, the ratchet shaft 60 includes the adjustment portion 66 adjusted to the barrel shaft 50. According to this constitution, the coaxiality between the barrel shaft 50 and the ratchet shaft 60 is limited by an adjustment with reduced clearance between the barrel shaft 50 and the adjustment portion 66 to be less than a clearance between the adjustment surface 58 of the barrel shaft 50 and the adjustment portion 66, and it It is possible to maintain a state in which the barrel shaft 50 and the ratchet shaft 60 are arranged coaxially. Consequently, it is possible to prevent a defect in coaxiality between the barrel shaft 50 and the ratchet shaft 60 due to poor centering, during manufacture, (eccentricity) of the thread 51 of the shaft of barrel 50 and male thread 63 of the ratchet shaft 60. Consequently, it is possible to propose a barrel drum assembly 17 assembled with high precision.
    The movement 2 and the timepiece 1 of this embodiment include the barrel drum assembly 17 described above so that they can be thin and have an excellent ability to be maintained in good condition.
    Second Embodiment A second embodiment will now be described with reference to FIG. 4. In the first embodiment, the ratchet shaft 60 is screwed into the barrel shaft 50. On the other hand, the second embodiment is different from the first embodiment in that the ratchet tree 160 is driven into the barrel shaft 150. Furthermore, the other constitutions described below are the same as those of the first embodiment.
    FIG. 4 is a sectional view of the barrel drum assembly according to the second embodiment.
    As shown in fig. 4, instead of the thread 51 of the barrel shaft 50 of the first embodiment, a driving surface 151 to which the ratchet shaft 160 is driven is formed on an internal peripheral surface of the barrel shaft 150 of the second embodiment. Instead of the male thread 63 of the ratchet shaft 160 of the first embodiment, a driving surface 163 against which the barrel shaft 150 is driven is formed on an external peripheral surface of the ratchet shaft 160 of the second embodiment. Consequently, the ratchet shaft 160 is driven into the barrel shaft 150 so as to be fixed to this barrel shaft 150.
    A through hole 65, passing vertically, is formed in a flange 64 of the ratchet shaft 160, instead of the hollow or hole 65 of the first embodiment. The through hole 165 is formed in a position overlapping the ratchet 27 as seen in the vertical direction. In addition, a notch 166 hollowed inwards in the radial direction is formed in the external peripheral surface (the edge) of the flange 64 of the ratchet shaft 160. The notch 166 opens both in the surface external device and the underside of the flange 64. When the ratchet shaft 160 and the barrel shaft 150 are separated, a first template is inserted from above into the through hole 165 so as to press the barrel shaft 150 by means of the ratchet 27, while a second template is hooked to the notch 166 so as to separate the flange 64 from the ratchet 27. Consequently, the ratchet shaft 160 can be pulled out of the interior of the '' barrel shaft 150.
    As described above, in this embodiment, the ratchet shaft 160 is driven out relative to the barrel shaft 150. According to this constitution, the barrel shaft 150 is firmly fixed to the ratchet shaft 160. Consequently, it is possible to prevent an inclination of the barrel relative to the state where the barrel is arranged coaxially with the first axis O1 to occur by displacement of the barrel 28 supported by the barrel shaft 150 relative to the ratchet shaft 160. Consequently, an inclination of the barrel 28 and a contact of this barrel 28 with the plate 10 pivotally retaining the ratchet shaft 160 are prevented, so that the space between the barrel 28 and the plate 18 can be further reduced. Therefore, it is possible to make the barrel drum assembly 117 thin. In addition, it can be avoided that an increase in the rotational load (of the torque to be produced) results from contact between the barrel 28 and the plate 10. Consequently, the ratchet shaft 160 and the barrel 150 can be easily dissociated. Consequently, it is possible to propose a barrel drum assembly 117 whose capacity to be maintained in condition is improved.
    In addition, in the ratchet shaft 160, the through hole 165 traversing in the vertical direction is formed in a position straddling the ratchet 27 as seen in a vertical direction. According to this constitution, the ratchet 27 is pressed while passing through the through hole 165, so that the ratchet 27 can be moved in the vertical direction relative to the ratchet shaft 160. Consequently, the ratchet 27 and the ratchet tree 160 can be easily dissociated. Therefore, it is possible to provide a barrel drum assembly 117 whose ability to be maintained in condition is improved.
    CH 715 054 A2
    Third embodiment We will now describe a third embodiment with reference to FIG. 5. The third embodiment differs from the first embodiment in that a pin 273 is inserted into the through hole 165 of the flange 64 of the ratchet shaft 160. In addition, the other constitutions described below are the same as those of the second embodiment.
    [0090] FIG. 5 is a sectional view of the barrel drum assembly according to the third embodiment.
    As shown in fig. 5, the pin 273 protruding upwards is provided in the ratchet 227. The pin 273 is driven in a pin hole 274 formed in the ratchet 227. In addition, the pin 273 can be driven in a hollow or hole formed in the upper face of the ratchet 227. In addition, the pin 273 can be formed integrally with the ratchet 227. The pin 273 is inserted from below into the through hole 165 of the flange 64 of the ratchet shaft 160 Consequently, the ratchet 227 and the ratchet shaft 160 are coupled with each other in the circumferential direction and prevent relative rotation. The pin 273 is formed so as to have the same diameter as the through hole 165 of the flange 64 or a smaller diameter than that of the through hole 165 as seen in the vertical direction. In this embodiment, the pin 273 has a cylindrical shape having a diameter slightly smaller than that of the through hole 165. For example, an upper surface of the pin 273 is flush with the upper face of the flange 64.
    As described above, in the barrel drum assembly 217 of this embodiment, the ratchet 227 and the ratchet shaft 160 are coupled to each other in the circumferential direction and the relative rotation. is prevented, so that it is possible to more reliably prevent sliding of the ratchet 227.
    Fourth embodiment We will now describe a fourth embodiment with reference to FIGS. 6 and 7. In the second embodiment, the ratchet 27 is indirectly attached to the ratchet shaft 160 via the barrel shaft 150. On the other hand, the fourth embodiment differs from the second embodiment in that the ratchet 327 is fixed directly to the ratchet shaft 360. In addition, the other constitutions described below are the same as those of the second embodiment.
    [0094] FIG. 6 is a sectional view of the barrel drum assembly according to the fourth embodiment. Fig. 7 is a sectional view taken along the line VII-VII of FIG. 6.
    As shown in figs. 6 and 7, a groove 358 (corresponding to what is called the "relative rotation prohibition part" in the appended claims) is formed in the upper end of the barrel shaft 250. The groove 358 extends along a predetermined straight line, orthogonal to the first axis O1. The groove 358 is open upwards and outwards in the radial direction.
    The ratchet shaft 360 includes a large diameter portion 367 and a projecting adjustment portion 368 (corresponding to called the "relative rotation prohibition portion" in the appended claims). The large diameter portion 367 is adjacent to the flange 64 downward. The large diameter portion 367 has a cylindrical shape whose diameter is smaller than that of the flange 64 and is larger than that of the upper end of the barrel shaft 350. A driving surface 367a, on which the ratchet 327 is driven, is formed on the outer peripheral surface of the large diameter portion 367. A shaft hole 371 of the ratchet 327 is driven on the large diameter portion 367. Therefore, the ratchet 327 is fixed directly to the ratchet shaft 360. In addition, ratchet 327 and ratchet shaft 360 can be coupled to each other in the circumferential direction by a flat or the like.
    The projecting adjustment portion 368 projects downwards from a lower surface of the large diameter portion 367. The projecting adjustment portion 368 penetrates into the groove 358 of the shaft. barrel 350. Therefore, the projecting adjustment portion 368 of the ratchet shaft 360 and the groove 358 of the barrel shaft 350 prevent rotation of the barrel shaft 350 and the ratchet 327 one by one. relative to each other, indirectly via the ratchet shaft 360. The protruding adjustment portion 368 extends along the longitudinal direction of the groove 358. A width of the protruding adjustment portion 368 is slightly smaller than the width of the groove 358. The projecting adjustment portion 368 projects on each side of the groove 358 in the radial direction. An outer peripheral surface of the protruding adjustment portion 368 is flush with the outer peripheral surface of the large diameter portion 367. The protruding adjustment portion 368 abuts against the bottom of the groove 358 from above.
    A through hole 365, traversing vertically, is formed in the ratchet shaft 360, instead of the through hole 165 of the ratchet shaft 160 of the second embodiment. The through hole 365 is formed in a position overlapping an upper face of the barrel shaft 350 as seen in a vertical direction. The through hole 365 vertically penetrates both the flange 64 and the large diameter portion 367. When the ratchet shaft 360 and the barrel shaft 350 are dissociated, a template is inserted from above into the through hole 365 for pressing the upper end of the barrel shaft 350. Therefore, the ratchet shaft 360 can be pulled out of the interior of the barrel shaft 350.
    As described above, the barrel drum assembly 317 of this embodiment comprises the groove 358 of the barrel shaft 350 indirectly preventing relative rotation between the barrel shaft 350 and the ratchet 327 by engagement, as well as the projecting adjustment portion 368 of the ratchet shaft 360. According to this constitution, since a relative rotation between the barrel shaft 350 and the ratchet 327 is prevented by engagement, ratchet 327
    CH 715 054 A2 and the barrel 28 carried by the barrel shaft 350 can be easily dissociated, compared to the case of a constitution in which a relative rotation between the barrel shaft and the ratchet is prevented by friction such as a hunt. Therefore, it is possible to provide a barrel drum assembly 317 whose ability to be maintained in condition is improved while a sliding of the ratchet 327 relative to the barrel shaft 350 is prevented.
    In addition, the through hole 365 penetrating in the vertical direction is formed in a position overlapping the barrel shaft 350 as seen in a vertical direction, in the ratchet shaft 360. According to this constitution, we press the barrel shaft 350 passing through the through hole 365, so that the barrel shaft 350 can be moved in the vertical direction, relative to the ratchet shaft 360. Therefore, the barrel shaft 350 and the ratchet tree 360 can be easily dissociated. Therefore, it is possible to provide a barrel drum assembly 317 whose ability to be maintained in condition is improved.
    The present invention is not limited to the embodiments which have been described above with reference to the drawings, and various examples of modification are conceivable within the scope of the technical scope of the present invention.
    For example, in the first embodiment, as a structure in which the ratchet shaft 60 is turned by a jig, the hollow or hole 65 is provided in the flange 64, but the invention is not limited at that and the ratchet shaft and the jig can otherwise mesh with each other in the circumferential direction. As a structure in which a jig engages the ratchet shaft in the circumferential direction, a flat may, for example, be provided in a flange, or it may be a groove for a driving tool, a hollow in which a square wrench is inserted or the like which is provided in the upper pivot or in the lower pivot.
    Furthermore, within the scope not departing from the spirit of the present invention, it is possible to replace constituent elements of the embodiments described above by known constituent elements, in an appropriate manner, by more than which the embodiments described above can be suitably combined.
    权利要求:
    Claims (10)
    [1]
    claims
    1. Barrel drum assembly comprising:
    a barrel which contains a barrel spring inside it, to which one end of the barrel spring is attached and which rotates on an axis by disarming the barrel spring;
    a hollow barrel shaft which is arranged coaxially with the axis and carries the barrel rotatably relative to it, and to which the other end of the barrel spring is attached;
    a ratchet shaft which comprises an upper pivot and a lower pivot, and which is inserted inside the barrel shaft so as to be arranged coaxially with the axis;
    a ratchet arranged coaxially with the axis, between the upper pivot and the lower pivot; and a relative rotation prohibition portion which prevents, directly or indirectly, relative rotation between the barrel shaft and the ratchet, by engagement.
    [2]
    2. Barrel drum assembly according to claim 1, wherein an insertion portion into which the barrel shaft is inserted is formed in the ratchet, and wherein the ratchet is engaged with the barrel shaft according to a circumferential direction around the axis.
    [3]
    3. Barrel drum assembly according to claim 1 or 2, wherein the ratchet shaft comprises a projecting part, projecting in a direction orthogonal to the axis, and wherein the ratchet is in contact with the projecting part at least three points distributed around the axis when looking in the axial direction of the axis.
    [4]
    4. Barrel drum assembly according to claim 3, wherein the ratchet is sandwiched between the protruding part and the barrel shaft.
    [5]
    5. Barrel drum assembly according to one of claims 1 to 4, wherein the ratchet shaft is screwed into the barrel shaft.
    [6]
    6. Barrel drum assembly according to claim 5, wherein the ratchet shaft comprises an adjustment portion fitted on or in the barrel shaft.
    [7]
    7. Barrel drum assembly according to one of claims 1 to 4, wherein the ratchet shaft is driven into the barrel shaft.
    [8]
    8. Barrel drum assembly according to one of claims 1 to 7, wherein, in the ratchet shaft, a through hole penetrating in the axial direction is formed in a position overlapping the barrel shaft and / or the ratchet when looking in the axial direction of the axis.
    [9]
    9. Movement comprising: a barrel drum assembly according to one of claims 1 to 8.
    [10]
    10. A timepiece comprising: a movement according to claim 9.
    CH 715 054 A2
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    同族专利:
    公开号 | 公开日
    JP2019215259A|2019-12-19|
    JP6653731B2|2020-02-26|
    CN110597041A|2019-12-20|
    引用文献:
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    CN2911746Y|2006-05-19|2007-06-13|上海恒保钟表有限公司|Driving gear in wrist watch with intermediate flywheel|
    EP1925996A1|2006-11-06|2008-05-28|ETA SA Manufacture Horlogère Suisse|Device for correction of a display mechanism for a timepiece|
    CN101125426A|2007-09-28|2008-02-20|熊玉勇|Full-automatic hairclipper|
    JP2010256249A|2009-04-27|2010-11-11|Seiko Instruments Inc|Timepiece with function for displaying day, am and pm|
    CN206115154U|2016-09-13|2017-04-19|天津海鸥表业集团有限公司|Former subassembly that moves of two clockwork spring wrist -watches|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2018112650A|JP6653731B2|2018-06-13|2018-06-13|Barrel assembly, movement and clock|
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