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  • 权利要求
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    • 专利摘要:
    The invention relates to a timepiece component, in particular a balance, comprising a shafted part (2) comprising at least one pivot (3) around a pivot axis (D), at least the material constituting said shafted part ( 2) being a non-magnetic ceramic type material, said shafted part (2) comprises a plurality of recesses (7) balanced or regularly distributed around said pivot axis (D), and has its center of inertia on said pivot axis (D), and said shafted part (2) has a flange (9) constituting its largest diameter relative to said pivot axis (D), which flange (9) has a joint plane (90) of said shafted part ( 2), which joint plane (90) is substantially perpendicular to said pivot axis (D), said flange (9) is crossed by said recesses (7), and at least one said recess (7) contains an injection point (8) of said material. The invention also relates to a method for producing such a component.
    公开号:CH715175A2
    申请号:CH00724/19
    申请日:2019-06-05
    公开日:2020-01-15
    发明作者:Delizée Alain；Reymond Cédric
    申请人:Blancpain Sa；
    IPC主号:
    专利说明:

    Description
    FIELD OF THE INVENTION The invention relates to a timepiece component comprising a shafted part comprising at least one pivot about a pivot axis.
    The invention also relates to a clock oscillator, comprising at least one such component.
    The invention also relates to a timepiece movement, comprising at least one such oscillator, and / or at least one such component.
    The invention also relates to a timepiece comprising at least one such movement and / or at least one such oscillator, and / or at least one such component.
    The invention also relates to a method of producing a timepiece component, more particularly a timepiece mobile, which component comprises a shafted part, which comprises at least one pivot about a pivot axis.
    The invention relates to the field of components and clockwork mobiles, and more particularly the production of mobiles that include oscillators or clockwork movements.
    BACKGROUND OF THE INVENTION The manufacture of small timepiece components, in particular of mobiles, is always a concern for the manufacturer, because of machining costs which can be high, and the difficulty for make certain geometries, in particular when the component concerned has large cross-sectional deviations, as is the case, for example, for a pendulum: such a mobile must have perfect pivoting despite a small pivot diameter, and must be sufficiently impact resistant, any veil resulting in an imbalance detrimental to the maintenance of a constant oscillation frequency.
    Document EP 3 258 325 A1 in the name of ROLEX describes a timepiece shaft, in particular a pendulum shaft, comprising a first functional portion including at least part of a tigeron and / or at least part of a pivot , the first functional portion being made of ceramic and a first outside diameter of the first functional portion being less than 0.5 mm, or even less than 0.4 mm, or even less than 0.2 mm, or even less than 0.1 mm.
    Document FR 143 887 A in the name of TISSOT describes a device for fixing one end of a hairspring regulating the clockwork movement to a connecting member. This connecting member comprises hooking notches, in particular grooves, and may be in one piece with the balance shaft with which the hairspring cooperates.
    权利要求:
    Claims (22)
    [1]
    Summary of the invention The invention proposes to offer an alternative to traditional watchmaking mobiles comprising steel shafts, and to combine perfect geometry and excellent resistance.
    To this end, the invention relates to a timepiece component comprising a shafted part comprising at least one pivot about a pivot axis, according to claim 1.
    The invention also relates to a clock oscillator, comprising at least one such component.
    The invention also relates to a clockwork movement, comprising at least one such oscillator, and / or at least one such component.
    The invention also relates to a timepiece comprising at least one such movement and / or at least one such oscillator, and / or at least one such component.
    The invention also relates to a method of producing a timepiece component, more particularly a timepiece mobile, which component comprises a shafted part, which comprises at least one pivot about a pivot axis, according to claim 18.
    Brief description of the drawings [0016] Other characteristics and advantages of the invention will appear on reading the detailed description which follows, with reference to the accompanying drawings, where:
    fig. 1 shows, schematically, and in side view, a timepiece component according to the invention, which is here a mobile constituting a pendulum; and which comprises a through shafted part including two pivots at its distal ends along the axis of rotation, which shafted part carries, on a first bearing, a pendulum serge which is in lateral support on a first side of a flange which constitutes the zone of larger diameter of the tree-shaped part, which also carries, on a second bearing surface and resting on a second flank of the flange opposite the first, a balance plate carrying a plate pin;
    fig. 2 shows, schematically and in perspective, the only tree part of this mobile, which tree part here has three recesses at 120 ° which all cross the collar, and at the bottom of which are visible injection points;
    fig. 3 shows this tree part in a similar manner to FIG. 1;
    fig. 4 shows this tree part in end view;
    fig. 5 is a block diagram representing a watch comprising a clockwork movement, which comprises an oscillator, which incorporates such a mobile;
    fig. 6 shows, schematically and in perspective, another clock component according to the invention, which is here a mobile of a cog; and which has a through shafted part including two pivots at its distal ends along the axis of rotation, which shafted part carries a toothed pinion;
    fig. 7 shows, in side view, the mobile of FIG. 6;
    fig. 8 shows, in perspective, the only tree part of the mobile of FIG. 6;
    fig. 9 shows, in side view, the only shafted part of the mobile of FIG. 6;
    fig. 10 shows, schematically and in perspective, yet another clock component according to the invention, which is here a mobile of a cog; and which has a through shafted part including two pivots at its distal ends along the axis of rotation, which shafted part carries a toothed pinion and a toothed wheel;
    fig. 11 shows, schematically and in perspective, yet another clock component according to the invention, which is here an anchor; and which has a through shafted part including two pivots at its distal ends along the axis of rotation, which shafted part constitutes the anchor rod, and carries the anchor body.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention relates to a timepiece component 1, more particularly a timepiece mobile. This component 1 comprises a shafted part 2, which comprises at least one pivot 3 around a pivot axis D.
    At least the material of the shafted part 2 is a ceramic, or the like.
    According to the invention, this tree part 2 comprises a plurality of recesses 7, which are balanced around the pivot axis D, and in particular which are distributed regularly around the pivot axis D, and has its center of inertia on pivot axis D.
    And this tree part 2 has an area of larger diameter, called flange 9, which constitutes its largest diameter relative to the pivot axis D.
    More particularly this flange 9 has a joint plane 90 of the shafted part 2, which joint plane 90 is substantially perpendicular to the pivot axis D.
    More particularly, the flange 9 is crossed by the recesses 7.
    In a particular and advantageous embodiment when the material constituting the shafted part 2 is injectable, at least one recess 7 contains an injection point 8 of the material. More particularly, each recess 7 contains an injection point 8 for the material. Advantageously, the injection point 8 is located in the region of the recess 7 which is closest to the pivot axis D. And, in a particular variant, the injection point is located, according to the direction of axis D, at the middle of the flange 9.
    The housing of the injection point 8 in a recess 7 is particularly advantageous, because therefore there is no interference with any functional range of revolution whatsoever. In addition, in the particular case illustrated by the figures of cylindrical recesses 7, any retouching of the injection point 8 is extremely easy, and absolutely does not risk injuring a functional range.
    In another embodiment, at least one injection point is located in another non-functional part of the shafted part 2, for example under the largest diameter, or is located in another non-functional part of the component 1 made with the shafted part 2 and in the same material, in particular a ceramic. By non-functional part is meant here a part of the component of which no surface is arranged to cooperate with another component of a clockwork mechanism.
    Alternatively, the injection point 8 is housed in the bottom of a groove of revolution.
    For a production by injection into a mold in two parts on either side of the joint plane 90, the section of the shaded part decreases from the joint plane 9 towards each distal end preferably comprising a pivot 3 and / or a tigeron. This execution makes it possible to obtain the injection pivot pivots without injection.
    The shape of the "injection point" depends on the mold and the production facility used. It is generally circular, but this execution is not limiting, the injection point can also be a short segment, and its surface and its shape are linked to the space available on the component 1 in a non-functional area, as on an anchor rod, or a flange or a bottom of teeth for a pinion, or similar. The injection point is advantageously housed in the bottom of a notch or a recess.
    In particular, the tree part 2 comprises, for the support of a twill 4 or a plate 40 that comprises the component 1, at least one bearing 5, 6, of revolution around the axis of pivot D, which is adjacent to at least one bearing surface 50, 60, which is of revolution about the pivot axis D. This serge 4 can be a pendulum serge, or a toothed plate, or the like.
    In another embodiment, the component 1 is a wheel or a pinion, and comprises, at the level of its collar 9, a toothing which can also be made of ceramic, and come from injection, which makes it possible to avoid any reworking or cutting machining.
    More particularly, the shafted part 2 comprises, on either side of the collar 9, a first and a second bearing 5, 6, and a first and a second bearing surface 50, 60.
    Alternatively, the scope 5, 6 is cylindrical.
    Alternatively, the second support surface 50, 60 is conical or planar.
    [0034] FIG. 1 illustrates a component 1, which is here a mobile constituting a pendulum; and which comprises a shafted part 2, traversing including two pivots 3 at its distal ends along the axis of rotation D. The shafted part 2 carries, on a first bearing 5, a balance serge 4 which is in lateral support on a first flank 6 of the flange 9. The tree portion 2 also carries, on a second bearing surface 50 and resting on a second flank60 of the flange 9 opposite to the first flank 6, a balance plate 40 carrying a plate pin.
    More particularly, the material is a ceramic. Such a ceramic comprises at least one first element chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TiB 2 , diamond, tungsten carbide, vitreous silica, or the like. Naturally, this ceramic can comprise a plurality of components chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TiB 2 , diamond, tungsten carbide, vitreous silica, or the like. This ceramic generally comprises at least one stabilizer, and / or at least one dopant, and / or at least one material allowing the improvement of the mechanical properties, such as MgO, CaO, Y 2 O 3 , or the like, and / or at least one additive such as carbon, carbon fibers, carbon nanotubes, colored pigment, electret, or the like, for other lubricating, appearance, magnetic, or other properties. Without limitation, such a ceramic is injected into a mold, then sintered, to produce the component.
    The component illustrated in the figures is for example advantageously made of zirconium oxide ZrO 2 , usually called zirconia, with at least one dopant of yttrium oxide Y 2 O 3 .
    In particular, the material of the shafted part, in particular such a ceramic, is entirely non-magnetic.
    In an alternative, the material of the shafted part, in particular such a ceramic, is loaded with magnetized and / or magnetizable particles.
    In a particular application, the component 1 is a pendulum, and carries, on the shafted part 2, at least one twill 4 and a plate 40.
    The invention also relates to a clock oscillator 100, comprising at least one such component 1.
    The invention also relates to a clockwork movement 200, comprising at least one such oscillator 100, and / or at least one such component 1.
    The invention also relates to a timepiece 1000 comprising at least one such movement 200 and / or at least one such oscillator 100, and / or at least one such component 1. More particularly, this timepiece 1000 is a watch.
    The invention also relates to a method for producing a timepiece component 1, more particularly a timepiece mobile, which component 1 comprises a shafted part 2, which comprises at least one pivot 3 about an axis pivot D. According to this method, this shafted part 2 is produced by injecting a material of the ceramic or similar type into a mold in at least two parts arranged for the direct production of surfaces of revolution at each pivot 3. More in particular, at least two parts of the mold are aligned along the pivot axis D; more particularly still, these at least two aligned parts extend from one side and from a joint plane at the level of which is the zone of larger diameter of the tree part 2, which zone of larger diameter defines a flange 9. More particularly, the material is injected into the mold at the level of at least one injection point 8 formed in at least one recess 7 which comprises the collar 9, and which corresponds to a projecting part of the mold. More particularly, the material is injected at at least one injection point 8, in the zone of the relevant recess 7 which is closest to the pivot axis D. After filling the mold, the hardening of the mold is carried out. injection material according to the process specific to this material, polymerization, sintering, or other. The mold is opened after the injection material has hardened. If necessary, a bearing is carried out by grinding and / or diamond-cutting, or the like, of the bearing surfaces of revolution and in particular of the pivots and / or shanks which the shafted part 2 comprises. When the component 1 is not limited to the shafted part 2, and comprises at least one added element such as a twill 4 and / or a plate 40, and / or dowel or the like, each such element is attached to the tree part and immobilized by gluing or the like. More particularly but not limited to, this immobilization is irreversible.
    The invention thus makes it possible to produce a timepiece component, and in particular a timepiece mobile, with a precise shape and surfaces of revolution by injecting material into a mold in at least two parts. This material can in particular be a non-magnetic ceramic. The obtaining process allows a saving of material due to an implementation substantially at finished dimensions, and a significant saving of machining. Such an injection process also guarantees good direct balancing of the shafted part. Finishes are kept to a minimum, and, depending on the function of component 1, may even be superfluous.
    claims
    1. Timepiece component (1) comprising a shafted part (2) comprising at least one pivot (3) around a pivot axis (D), at least the material constituting said shafted part (2) being a ceramic , and characterized in that said shafted part (2) has a plurality of recesses (7) balanced around said pivot axis (D), and has its center of inertia on said pivot axis (D), in that said shafted part (2) comprises a collar (9) constituting its largest diameter with respect to said pivot axis (D), which collar (9) comprises a joint plane (90) of said shafted part (2), which plane joint (90) is substantially perpendicular to said pivot axis (D), and in that said flange (9) is crossed by said recesses (7).
    [2]
    2. Component (1) according to claim 1, characterized in that at least one said recess (7) contains an injection point (8) of said material.
    [3]
    3. Component (1) according to claim 2, characterized in that said injection point (8) is located in the region of said recess (7) which is closest to said pivot axis (D).
    [4]
    4. Component (1) according to one of claims 1 to 3, characterized in that said component (1) comprises at least one injection point (8) in a non-functional part of said shafted part (2), or in another non-functional part of said component (1) produced with said shafted part (2) and in the same material.
    [5]
    5. Component (1) according to one of claims 1 to 4, characterized in that said tree part (2) comprises, for the support of a twill (4) or a plate (40) that comprises said component (1), at least one bearing surface (5; 6) of revolution around said pivot axis (D) adjacent to at least one bearing surface (50; 60) of revolution around said pivot axis (D).
    [6]
    6. Component (1) according to claim 5, characterized in that said shafted part (2) comprises, on either side of said collar (9), a first and a second said bearing surfaces (5; 6), and first and second said support surfaces (50; 60).
    [7]
    7. Component (1) according to claim 5 or 6, characterized in that said bearing (5; 6) is cylindrical.
    [8]
    8. Component (1) according to one of claims 5 to 7, characterized in that said second bearing surface (50; 60) is conical or planar.
    [9]
    9. Component (1) according to one of claims 1 to 8, characterized in that said material is a ceramic comprising at least one first element chosen from aluminum oxide, zirconium oxide, silicon oxide, silicon nitride, silicon carbide, silicon nitride, titanium carbide, boron carbide, titanium diboride TIB 2 , diamond, tungsten carbide, vitreous silica.
    [10]
    10. Component (1) according to claim 9, characterized in that said ceramic comprises at least one additive chosen from MgO, CaO, Y2O3, carbon, carbon fibers, carbon nanotubes, colored pigments, electrets.
    [11]
    11. Component (1) according to one of claims 1 to 10, characterized in that said material is a zirconium oxide ceramic ZrO 2 with a yttrium oxide dopant Y 2 O 3 .
    [12]
    12. Component (1) according to one of claims 1 to 11, characterized in that said ceramic is entirely non-magnetic.
    [13]
    13. Component (1) according to one of claims 1 to 12, characterized in that said ceramic is loaded with magnetized and / or magnetizable particles.
    [14]
    14. Component (1) according to one of claims 1 to 13, characterized in that said component (1) is a pendulum, and carries, on said shafted part (2), at least one twill (4) and a plate (40).
    [15]
    15. Clock oscillator (100), comprising at least one component (1) according to one of claims 1 to 14.
    [16]
    16. Clock movement (200), comprising at least one oscillator (100) according to claim 15, and / or at least one component (1) according to one of claims 1 to 14.
    [17]
    17. Timepiece (1000) comprising at least one movement (200) according to claim 16 and / or at least one oscillator (100) according to claim 15, and / or at least one component (1) according to one of claims 1 to 14.
    [18]
    18. Timepiece (1000) according to claim 17, characterized in that it is a watch.
    [19]
    19. Method for producing a timepiece component (1) comprising a shafted part (2), which comprises at least one pivot (3) around a pivot axis (D), characterized in that one realizes said shafted part (2) by injection of a ceramic or similar material in a mold in at least two parts arranged for the direct production of surfaces of revolution at each said pivot (3), and, after filling of said mold the injection material is hardened according to the process specific to this material, then the mold is opened after the injection material has hardened, and, when said component (1) is not limited to said shafted part (2), and comprises at least one attached element, each said element is attached to said shafted part (2) on which it is immobilized.
    [20]
    20. The method of claim 19, characterized in that, after the opening of the mold, a recovery is carried out by rectification and / or diamond cutting of the bearing surfaces of revolution and in particular of said pivots (3) and / or tigerons that comprises said part tree (2).
    [21]
    21. The method of claim 19 or 20, characterized in that a said mold is used which comprises at least two parts of the mold aligned along said pivot axis (D), and which extend from both sides and from a plane joint at the level of which is the zone of largest diameter of said shafted part (2), which zone of largest diameter defines a flange (9).
    [22]
    22. Method according to claim 21, characterized in that said material is injected into the mold at at least one injection point (8) formed in at least one recess (7) that comprises said flange (9) .

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    同族专利:
    公开号 | 公开日
    CH715162A2|2020-01-15|
    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
    CH00857/18A|CH715162A2|2018-07-10|2018-07-10|Timepiece component with non-magnetic ceramic shafted part.|
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