• 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 device for fixing a display or covering element on a timepiece structure, comprising a retaining key (1) comprising a tenon (2) to be fixed to said structure and a head ( 9) with a truncated flange (3) comprising a first lip (31) cooperating in locking support with a bearing surface of a fastening element integral with this display or trim element. Said first lip (31) is delimited by edges (51, 52) which are not coplanar, this retaining key (1) comprises, contiguous to each edge (51, 52) and recessed radially with respect to the periphery of the first lip (31), a second lip (6) comprising an upper surface which is, at the level of each said edge (51, 52), undercut with respect to the upper surface of the first lip (31), these ridges (51, 52) are radiated, with a radius between 10 micrometers and 30 micrometers. The invention also relates to a timepiece, in particular a watch, comprising such a fixing device, in particular for a dial. The invention makes it possible, for example, when the fixing element is a dial base and the key holding a dial key, to avoid generating a burr from said dial base during the rotation of said dial key, said burr running the risk of detaching and polluting the movement. The material of the dial base can then be pushed back and not cut, the bead thus created remaining attached to the component.
    公开号:CH716942A2
    申请号:CH01319/20
    申请日:2020-10-16
    公开日:2021-06-15
    发明作者:Kaelin Laurent
    申请人:Eta Sa Mft Horlogere Suisse；
    IPC主号:
    专利说明:

    Field of the invention
    The invention relates to a device for fixing a display element or covering on a timepiece structure, comprising at least one holding key comprising a tenon arranged to be driven out or screwed or riveted or brazed or welded in a housing which said structure comprises or which comprises an element attached to said structure, said at least one holding key comprising a head with at least one truncated flange substantially of revolution relative to the axis of said tenon, the direction of said axis defining the direction of introduction of said display or trim element with respect to said structure, said truncated flange comprising a part substantially of revolution which extends over an angular sector strictly less than 360 °, and said flange truncated comprising at least a first lip delimited by a first upper surface and a first lower surface and which is arranged to cooperate in locking support with a surface or a bearing that comprises a fastening element integral with said display or trim element, and which first lip is further delimited at its ends by ridges.
    [0002] The invention relates to the field of fixing display or trim elements in a timepiece, in particular a watch. It relates in particular to the fixing of the dials.
    Background of the invention
    [0003] For fixing a display element or timepiece covering such as a dial comprising dial feet, to maintain these feet by deformation, dial keys comprising a bevelled and vertically truncated flange are used , the edge of which allows good penetration into the cylindrical part of the dial pie, thus allowing it to be immobilized. However, the rotation of such a dial key generally generates, during its rotation to fix the dial, a burr coming from the dial base concerned and which can be easily detached.
    JP S52 95453 U describes an eccentric pin equipped with an eccentric flange portion which pivots and protrudes from a dial plate foot which penetrates through a hole provided in a plate by rotating from the side surface . One side is cut, or both sides parallel to a straight line connecting the maximum and minimum eccentric points are cut.
    Summary of the invention
    To avoid the generation of such a burr, risking falling in the movement and polluting it, the invention relates to a fixing device comprising a new retaining key, which is obliquely truncated and bevelled at the point of attack of the dial base, from which the material of the dial base can then be pushed back and not cut, the bead thus created remaining attached to the component.
    [0006] To this end, the invention relates to a fixing device according to claim 1.
    [0007] The invention also relates to a timepiece, in particular a watch, comprising at least one such fixing device.
    Brief description of the drawings
    [0008] Other characteristics and advantages of the invention will become apparent on reading the detailed description which follows, with reference to the accompanying drawings, where:FIG. 1 represents, schematically, and in perspective, a retaining key that comprises a fixing device according to the invention; this retaining key comprises a truncated collar with a first conical lip, and a second oblique lip;FIG. 2 schematically represents the top view of the holding key of FIG. 1;FIGS. 3 and 4 represent, schematically, and in side view in two perpendicular directions, the holding key of FIG. 1;FIG. 5 schematically shows and in section along line AA of FIG. 2, a detail of the holding key of FIG. 1;FIG. 6 represents, schematically, and in perspective, a variant of a retaining key comprising two superimposed flanges;FIG. 7 represents, schematically and in perspective, another variant of a retaining key comprising two superimposed and angularly offset flanges;FIGS. 8 and 9 represent, schematically, and in top view, other variants of holding keys according to the invention;FIG. 10 represents, schematically, and in section, the holding key of FIG. 1 cooperating with a dial base by locally pushing its material, for fixing a dial on a structure;FIG. 11 represents, schematically, and in section, the holding key of FIG. 1 cooperating with a dial base resting on a groove that the latter comprises, for fixing a dial on a structure;FIG. 12 schematically represents a front view of a timepiece, here a watch, comprising a structure supporting a dial, assembled by a fixing device according to the invention, comprising three holding keys according to figure 1.
    Detailed description of the preferred embodiments
    The invention relates to a device 10 for fixing a display element or cover 20 on a structure 100 of timepieces.
    This fixing device 10 comprises at least one retaining key 1, which comprises a tenon 2, which is arranged to be driven or screwed or riveted or brazed or welded in a housing 8 that comprises the structure 100 or that comprises a element attached to the structure 100, or to the structure 100 or such an attached element. This retaining key 1 comprises a head 9, with at least one truncated flange 3 which is substantially of revolution relative to the axis D of the tenon 2. The direction of this axis D defines the direction of introduction of an element d. display or trim 20 relative to the structure 100.
    The truncated flange 3 comprising a part substantially of revolution which extends over an angular sector strictly less than 360 °, and this truncated flange 3 comprises at least a first lip 31, which is delimited by a first upper surface 38 and a first lower surface 39, and which is arranged to cooperate in locking support with a surface 42 or a bearing 41, cylindrical or otherwise, which comprises a fastening element 4 integral with a display or trim element 20.
    In a first particular variant embodiment, the first lower surface 39 is flat.
    In another particular variant embodiment, the first lower surface 39 is helical, with a very small pitch, of the order of a few hundredths of a millimeter, or even a tenth of a millimeter. This variant is suitable for good retention on a flat surface 42 of the fixing element 4, such as a groove face or even a front surface of a dial, or the like.
    This first lip 31 is delimited at its ends 311, 312 by ridges 51, 52.
    According to the invention, and as visible in Figures 1 to 5, these edges 51 and 52 are not coplanar, and this retaining key 1 comprises, contiguous to each edge 51, 52, and recessed radially by relative to the first periphery 30 of the first lip 31, a second lip 6. This second lip 5 comprises a second lower surface 69, which is common with the first lower surface 39, and a second upper surface 68 which is, at the level of each edge 51, 52, in relief with respect to the first upper surface 38 of the first lip 31.
    According to the invention, the edges 51, 52 are finely bevelled edges, and in particular radiated, with a radius of between 10 micrometers and 30 micrometers.
    More particularly, the first lip 31 is more elastic than the fixing element 4 with which it is arranged to cooperate, and this first lip 31 is arranged to push back the material of the fixing element 4 during a relative rotation of the retaining key 1 with respect to this fixing element 4. Preferably the first lip 31 has a hardness greater than or equal to 550 HV; more particularly, this retaining key 1 is made of steel.
    In a particular variant, and as shown in Figure 6, the holding key 1 comprises several truncated flanges 3, which are superimposed in the direction of the axis D, and able to exert different supports on the same fixing element 4. These superimposed lips allow different supports, either several supports on a cylindrical bearing surface of a dial base for example, or for both support by a flat surface of one of the lips against an upper surface of a dial for example, combined with a support of another lip on a cylindrical bearing surface of a dial base. Note that, in the preferred case of application to the fixing of a dial base, it is imperative to press the dial base opposite the lip, to avoid plastic deformation of the dial base in flexion.
    In another particular variant, and as seen in Figure 7, several of the truncated flanges 3 have first lips 31, 131, the edges 51, 52, respectively 151, 152, are angularly offset with respect to each other to others. Such angularly offset attack points then allow progressive tightening of the fixing element 4; this arrangement also makes it possible to guarantee good hold during successive dismantling, which watchmakers practice by always attacking another level of the dial base.
    More particularly, the first upper surface 38 is conical with a first half-angle at the apex α, with respect to the axis D, which is between 110 ° and 130 °. The more acute the angle of each lip, the easier the penetration into the fixing element, in particular a dial base or the like, is to the detriment of the resistance of the lip, otherwise the penetration would require too much torque and would tend to bend this fastening element, in particular a dial base.
    More particularly, in section in each radial plane passing through the axis D, the second upper surface 68 forms, with the axis D, a second angle β, which is between 40 ° and 50 °.
    More particularly, in a plane P perpendicular to the axis D, and at an edge 51, 52, the dihedral tangent to the first upper surface 38 and to the second upper surface 68 has a third angle between 145 ° and 165 °.
    In the general case, the holding key 1 is arranged to be used in both directions of rotation.
    In a particular case, the holding key 1 is arranged to be used in a single direction of rotation, and comprises a first lip 31 in a helix of less than one turn, in particular and not limited to extending over a angle less than 240 ° and with a pitch less than 300 micrometers. In the application to the fixing of a dial, this variant has the advantage of pulling the dial against its support through the dial feet, by managing the torque transmitted to the keys to prevent tearing; naturally, to allow the engagement of the dial base without contact, a zone without thread is required, which explains the angle less than one revolution.
    More particularly, and as illustrated by the figures, the first lower surface 39 is flat.
    More particularly, and as illustrated by the figures, the second upper surface 68 is flat.
    In a variant, and as visible in Figure 9, the second upper surface 68 is concave. It will in fact be understood that the important thing is that this truncated surface 6 escapes cooperation with the foot, it can be arbitrary provided that the interface zones at the level of the edges 51 and 52 ensure the function of pushing the material back to the bottom. fixing element level 4.
    More particularly, in projection on a plane perpendicular to the axis D, the tangents T1, T2, at the edges 51, 52, at the level of the ends of the edges 51, 52, contiguous with the first periphery 30 of the first lip 31 form between them a fourth angle γ which is between 90 ° and 130 °.
    More particularly, the first periphery 30 of the first lip 31 is a morfil of thickness less than or equal to 35 micrometers.
    More particularly, the second lip 6 comprises a second periphery 60 which is a morfil of thickness less than or equal to 35 micrometers.
    More particularly, the display or cover element 20 is a dial, the holding key 1 is a dial key, and the fixing element 4 is a dial base or part of the dial.
    The invention also relates to a timepiece 1000, in particular a watch, comprising a structure 100 comprising at least one housing 8 for receiving a tenon, at least one display or covering element 20 comprising at least at least one fixing element 4, and at least one such fixing device 10, for fixing a display or covering element 20 on the structure 100 or on an element attached to the structure 100.
    More particularly, at least one display or trim element 20 comprises a side visible by the user, and each holding key 1 is insertable on the structure 100 or on an element attached to the structure 100 and accessible from the visible side, and comprises a driving surface 91 for the insertion of a tool capable of rotating the holding key around the axis D.
    More particularly, at least one display or trim element 20 and a holding key 1 arranged for locking this display or trim element 20 are fixed on separate elements, each attached to the structure 100.
    More particularly, at least one fastening element 4 of a display or trim element 20 comprises a groove 40, which is arranged to cooperate with the first lip 31 of a holding key 1 arranged for the blocking of this display or trim element 20.
    More particularly, at least one retaining key 1 is partially hidden, from the visible side, by the display or trim element 20 that blocks the retaining key 1.
    Such a retaining key 1 can be used for several assemblies, dismantles of the dial or the like.
    In the application of the fixing of a dial by a dial key, the first lip 31, penetrates a cylindrical bearing surface of the dial base, is rigid, and must not be deformed, its material base is in particular a steel, with in particular and without limitation a hardness of 550 to 670 HV.
    In a variant of a dial base 4 comprising a groove 40, the first lip 31 can bear on one of the faces of this groove 40. In other cases, it is necessary that the first lip 31 deforms the base of the dial. dial, because without deformation of the latter the hold is not guaranteed.
    In short, the invention makes it possible to avoid the generation of detachable burrs, and to ensure the maintenance of the cleanliness of the clockwork movement during the fixing of the display or trim elements.
    权利要求:
    Claims (21)
    [1]
    1. Fixing device (10) of a display element or cover (20) on a structure (100) of timepiece, comprising at least one retaining key (1) comprising a tenon (2) arranged for be driven or screwed or riveted or brazed or welded in a housing (8) that comprises said structure (100) or that includes an element attached to said structure (100), said at least one retaining key (1) comprising a head ( 9) with at least one truncated flange (3) substantially of revolution relative to the axis (D) of said pin (2), the direction of said axis (D) defining the direction of introduction of said display element or covering (20) relative to said structure (100), said truncated flange (3) comprising a portion substantially of revolution which extends over an angular sector strictly less than 360 °, and said truncated flange (3) comprising at least a first lip (31) delimited by a first upper surface (38) and a first lower surface eure (39) and which is arranged to cooperate in locking support with a surface (42) or a bearing (41) that includes a fastening element (4) integral with a said display or trim element (20 ), and which first lip (31) is further delimited at its ends (311, 312) by ridges (51, 52), characterized in that said ridges (51, 52) are not coplanar, and in that said at least one retaining key (1) comprises, contiguous to each said edge (51, 52) and recessed radially with respect to the first periphery (30) of said first lip (31), a second lip (6) comprising a second lower surface (69) common with said first lower surface (39), and a second upper surface (68) which is, at the level of each said edge (51, 52), in draft with respect to said first upper surface (38) ), and, characterized in that said ridges (51, 52) are radiated ridges, with a radius between 10 micrometers and 30 micromè very.
    [2]
    2. Fastening device (10) according to claim 1, characterized in that said first lip (31) is more elastic than said fastening element (4) with which it is arranged to cooperate, and is arranged to push back the material of said fixing element (4) during a relative rotation of said retaining key (1) with respect to said fixing element (4), and in that said first lip (31) has a hardness greater than or equal to 550 HV.
    [3]
    3. Fixing device (10) according to claim 1 or 2, characterized in that said retaining key (1) comprises several said truncated flanges (3) superimposed in the direction of said axis (D), capable of exerting different supports on the same said fixing element (4).
    [4]
    4. Fastening device (10) according to claim 3, characterized in that several of said truncated flanges (3) comprise said first lips (31) whose said ridges (51, 52) are angularly offset with respect to each other. .
    [5]
    5. Fastening device (10) according to one of claims 1 to 4, characterized in that said first upper surface (38) is conical with a first half-angle at the top (a), relative to said axis (D) , between 110 ° and 130 °.
    [6]
    6. Fastening device (10) according to one of claims 1 to 5, characterized in that, in section in each radial plane passing through said axis (D), said second upper surface (68) forms, with the axis D, a second angle (β), between 40 ° and 50 °.
    [7]
    7. Fastening device (10) according to one of claims 1 to 6, characterized in that, in a plane (P) perpendicular to said axis (D), and at the level of said edge (51, 52), the dihedron tangent to said first upper surface (38) and to said second upper surface (68) has a third angle between 145 ° and 165 °.
    [8]
    8. Fastening device (10) according to one of claims 1 to 7, characterized in that said retaining key (1) is arranged to be used in both directions of rotation.
    [9]
    9. Fastening device (10) according to one of claims 1 to 7, characterized in that said retaining key (1) is arranged to be used in a single direction of rotation, and comprises a said first lip (31) in a helix of less than one turn extending over an angle of less than 240 ° and with a pitch of less than 300 micrometers.
    [10]
    10. Fastening device (10) according to one of claims 1 to 9, characterized in that said first lower surface (39) is planar.
    [11]
    11. Fastening device (10) according to one of claims 1 to 10, characterized in that said second upper surface (68) is planar.
    [12]
    12. Fastening device (10) according to one of claims 1 to 10, characterized in that said second upper surface (68) is concave.
    [13]
    13. Fastening device (10) according to one of claims 1 to 12, characterized in that, in projection on a plane perpendicular to said axis (D), the tangents (T1, T2) to said edges (51, 52) at level of the ends of said ridges (51, 52) contiguous with the first periphery (30) of said first lip (31) form between them a fourth angle (γ) which is between 90 ° and 130 °.
    [14]
    14. Fastening device (10) according to one of claims 1 to 13, characterized in that said first periphery (30) of said first lip (31) is a morfil of thickness less than or equal to 35 micrometers.
    [15]
    15. Fastening device (10) according to one of claims 1 to 14, characterized in that said second lip (6) has a second periphery (60) which is a morfil of thickness less than or equal to 35 micrometers.
    [16]
    16. Fastening device (10) according to one of claims 1 to 15, characterized in that said display or covering element (20) is a dial, in that said holding key (1) is a dial key, and in that said fixing element (4) is a dial base or part of said dial.
    [17]
    17. Timepiece (1000) comprising a structure (100) comprising at least one housing (8) for receiving a tenon, at least one display or covering element (20) comprising at least one locking element. fixing (4), and at least one fixing device (10) according to one of claims 1 to 16 for fixing a said display or covering element (20) on said structure (100) or on an element attached to said structure (100).
    [18]
    18. Timepiece (1000) according to claim 17, characterized in that at least one said display or trim element (20) has a side visible to the user, and in that each said key support (1) is insertable on said structure (100) or on an element attached to said structure (100) and accessible from said visible side, and comprises a drive surface (91) for the insertion of a tool suitable for rotating said retaining key around said axis (D).
    [19]
    19. Timepiece (1000) according to claim 17 or 18, characterized in that at least one said display or trim element (20) and one said retaining key (1) arranged for locking this. display or trim element (20) are attached to separate elements, each attached to said structure (100).
    [20]
    20. Timepiece (1000) according to one of claims 17 to 19, characterized in that at least one fixing element (4) of said display element or covering (20) comprises a groove. (40) arranged to cooperate with said first lip (31) of a said retaining key (1) arranged for locking this display or trim element (20).
    [21]
    21. Timepiece (1000) according to claim 18 and one of claims 17 to 20, characterized in that at least one said holding key (1) is partially hidden, from said visible side, by said element. display or cover (20) that blocks said holding key (1).
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    同族专利:
    公开号 | 公开日
    CH716944A2|2021-06-15|
    CH716945A2|2021-06-15|
    CH716881A2|2021-06-15|
    CH716946A2|2021-06-15|
    CH716943A2|2021-06-15|
    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
    CH01528/19A|CH716881A2|2019-12-03|2019-12-03|Device for fixing a display element or a timepiece covering.|
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