• 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:
    An anchor for an escapement for a timepiece, comprising two arms (11, 12), a rod (14) connected to the two arms (11, 12), a pivot pin (13) located at one end of the rod ( 14), a fork (15) at the other end of the rod (14) and a dart (16) driven into the fork (15). The assembly of the fork (15) and the stinger (16) is made by means of a solid male portion of the stinger (16) and a female portion of non-circular complementary shapes and arranged to achieve a predetermined positioning and orienting the stinger (16) relative to the fork (15). The female part forms a hunting hole in the fork (15) in which the male part of the sting (16) is driven. The hunting orifice is increased by at least one cut, for example a slot (21), configured to distribute and control mechanical stresses due to the hunting of the sting (16) in the fork (15).
    公开号:CH713058A2
    申请号:CH01396/16
    申请日:2016-10-18
    公开日:2018-04-30
    发明作者:Lorenz Hubert；Glassey Marc-André；Genolet Grégoire
    申请人:Mimotec S A；
    IPC主号:
    专利说明:

    Description
    FIELD OF THE INVENTION [0001] The invention relates to the field of watchmaking and more particularly to a clockwork escapement consisting of an assembly of a dart on an anchor.
    BACKGROUND [0002] A timepiece escapement consists of an anchor comprising two arms and a rod, at the end of which is a fork. The fork is constituted by an inlet horn, an exit horn, and a sting usually driven in an orifice made in the fork so as to be angularly equidistant from the two horns.
    The stinger is integral with a male portion having a cross section of any shape preferably non-circular driven in a female part placed on the fork. The female part or orifice has a general shape corresponding to the shape of the cross section of the male part of the stinger. The angular position of the stinger relative to the fork is fixed by the non-circular shape of the male part and that of the corresponding orifice. As the male part and the female part have complementary shapes, only one possibility of assembly is allowed, which favors automatic assembly without subsequent adjustment of the angular position of the stinger.
    The anchor being very small, the driving operation of the stinger can cause some problems. During this hunting operation, the risk of breakage of the rod and / or the fork is important. Alternatively, if the connection between the dart and the fork is too loose, the sting can be removed.
    To avoid breakage during the driving operation, the elasticity of the assembly of the female part and / or the male part to a lesser extent can be increased without changing the nature of the material of the 'anchor. According to a solution developed in EP 1 331 528 A2, the hunting orifice corresponding to the female part has cutouts arranged around this orifice in the solid part of the fork. These cutouts of complex shape acting as springs have the disadvantage of having very thin protruding parts arranged along the contour of the orifice. These thin parts can break during the chase operation. Such a breakage can cause enlargement of the orifice and consequently undesirable release, rotation and / or translation of the stinger. In addition, the assembly of the dart by driving in this orifice has a certain elasticity and therefore the angular position of the stinger can vary depending on the distribution of mechanical stresses that can not be optimally controlled.
    EP 1 331 528 A2, CH 317 532 A2 and CH 695711 A5 disclose orifices having the same machined shape over the entire thickness of the solid part of the fork. In the case of non-circular orifices, an orientation error of the male part of the stinger at the beginning of the assembly operation by driving can cause burrs requiring an additional operation of polishing the fork. The configuration of the discharge hole of the document CH 695 711 A5, although ensuring a fixed orientation of the stinger, does not solve the problem of breakage of the fork and formation of burrs during driving. The circular firing orifice described by document CH 317 532 A2 does not make it possible to orient the stinger in a predetermined direction without a subsequent adjustment.
    SUMMARY OF THE INVENTION [0007] An object of the present invention is to overcome the disadvantages of the solution of the prior art by ensuring assembly by hunting without breakage and keeping a high accuracy in the positioning of the sting relative to to the different parts of the anchor. Variations of the invention make it possible to avoid the formation of burrs during assembly of the dart.
    This object is achieved by an anchor of an escapement for a timepiece according to claim 1.
    The anchor comprises two arms, a rod, a pivot axis located at one end of the rod connected to the two arms, a fork located at the other end of the rod and a dart driven into the fork. The assembly of the fork and the stinger is made by means of a solid male part of the stinger and a female part of complementary shapes preventing the rotation of the male part in the female part which are arranged so as to achieve a predetermined and oriented positioning of the stinger relative to the fork. The female part forms a hunting hole in the fork in which the male part of the sting is driven.
    The complementary shapes preventing the rotation of the male part in the female part may be arbitrary but non-circular so as to ensure only one possible orientation of the stinger relative to the fork.
    The anchor is characterized in that the hunting orifice is increased by at least one cutout configured to distribute and control mechanical stresses due to the hunting of the stinger in the range.
    According to a preferred embodiment, the cutout configured to distribute and control mechanical stresses may be in the form of a slot width and predetermined length extending the hunting hole. The slot is advantageously positioned parallel to a longitudinal axis of the rod and directed towards the pivot axis. The slot is configured to control by absorbing or minimizing deformations of the knockout hole when driving the stinger. The length of the slot is determined according to the elasticity of the material of the anchor. Its small width, between 5 and 50 microns, is determined so as not to compromise the strength of the fork and prevent a portion of the male part of the dart penetrates the slot.
    Latente not only increases the elasticity of the orifice but also to avoid burrs during hunting. Indeed the deformation of the hunting hole decreases the friction force between the walls of the orifice and that of the male part of the stinger and avoids tearing of the material of these walls causing the formation of burrs. In addition, the slot also allows a control of the driving force and the holding of the stinger in the hole.
    Alternatively, the cutout configured to distribute and control mechanical stresses may also be in the form of a rounded notch cut on a portion of at least one wall of the hunting hole.
    Various other variants relating to the entire hunting hole and cutting for the distribution and control of mechanical stresses and the male part of the dart are described below.
    BRIEF DESCRIPTION OF THE FIGURES The invention will be better understood from the detailed description which follows and which refers to the appended drawings which are given by way of non-limiting examples, namely: FIG. 1 illustrates a general view of a watch exhaust anchor on which a stinger is assembled at the fork, the anchor rod having a cutout configured to distribute and control mechanical stresses in the form of a cleft prolonging the hole of hunting of the sting. The slot is advantageously arranged along the axis of the rod, regardless of the non-circular shape of the hunting orifice. fig. 2 illustrates a top view of an enlargement of the fork of the anchor comprising a hunting orifice for the stinger extended by a slot. fig. 3a illustrates a stinger with a male part having a non-circular section and flat faces. fig. 3b illustrates a stinger with a male portion having a non-circular section with bulges on two sides. fig. 4 illustrates a hunting orifice having a shape corresponding to that of the male part of the stinger of FIG. 3a with flat walls, this hole is extended by a slot. fig. 5 illustrates the manner in which the flushing orifice of FIG. 4 prolonged by a crack deforms when the sting is hunted. fig. 6 illustrates a variant of the hunting orifice of FIG. 4 with bulges on the inner wall to improve the referencing of the stinger. fig. 7 shows a flushing orifice having bulges on the inner wall with a positioning of the male part of the stinger of FIG. 3b having on its faces bulges offset from those of the hunting orifice. fig. 8a illustrates a hunting orifice with a cutout configured to distribute and control mechanical stresses forming a rounded notch on an angle. fig. 8b illustrates a variant of the orifice of FIG. 8a with rounded notches on all angles. fig. 9 illustrates a variant of the hunting orifice of FIG. 4 with a slot whose end has a rounded notch used to improve the distribution of mechanical stresses around the end of the slot after driving the stinger. fig. 10 illustrates a variant of the hunting orifice of FIG. 9 whose opposing angles to the slot have a rounded notch used to improve the distribution of mechanical stresses around the corners after driving the stinger. fig. 11a illustrates a variant of the hunting orifice of FIG. 10 in which a countersink parallel to the contour of the orifice has been made to guide the male part of the stinger to pre-orient the stinger before hunting and avoid burrs. fig. 11b illustrates a section along the axis A-A of the hunting orifice provided with the counterbore of FIG. 11a, the depth of the counterbore depending on the thickness of the rod at the orifice. fig. 12a illustrates a variant of the hunting orifice of FIG. 9 in which an oblique counterbore has been made on the walls adjacent to the slot, the width of the countersink gradually decreasing from the slot to the wall opposite the slot. fig. 12b illustrates the variant of the hunting orifice of FIG. 12a with a positioning of the flat-faced male part of the stinger of FIG. 3a shown in a broken line. The flat faces of the male part of the dart are parallel to the walls of the counterbore and the wall of the orifice opposite to the slot has a width less than that of the counterbore. fig. 12c illustrates another variant of the hunting orifice of FIG. 12a with a positioning of the flat-faced male part of the stinger of FIG. 3a shown in a broken line. The flat faces of the male part of the dart are parallel to the walls of the counterbore and the wall of the orifice opposite to the slot has a width equal to that of the counterbore. fig. 13 illustrates a variant of the orifice of FIG. 8a with an oblique countersink on the walls adjacent to the rounded notch, the width of the countersink gradually decreasing from the rounded notch to the wall opposite this notch.
    DETAILED DESCRIPTION OF THE INVENTION [0017] The exhaust anchor 10 shown in FIG. 1 comprises a rod 14 whose one end comprises an inlet arm 11 and an output arm 12 and a pivot axis 13. The other end of the rod 14 terminates with a fork 15, in which is driven a The fork 15 comprises an inlet horn 17 and an exit horn 18 between which the stinger 16 is positioned and oriented in a direction parallel to the horns 17 and 18 represented by an axis 19 in FIG. 1. The end of the input arm 11 and that of the output arm 12 comprise notches for carrying pallets generally made of rubies which are fixed by driving or gluing in these notches. The rod 14 comprises a cutout configured to distribute and control mechanical stresses in the form of a slot 21 extending the orifice 20 for hunting the sting 16.
    The anchor 10 consists of components comprising an anchor body and its dart which are generally metallic and manufactured according to a method based on the LIGA technique (Lithography Galvanoformung Abformung). This process consists in irradiating an ultraviolet light-sensitive layer and performing an electroforming step. Such a method, described for example in patent EP 0 851 295 B1 comprises the following steps: depositing on a substrate a layer of 1 to 2000 μm of a photoresist called photoresist; - perform through a mask irradiation by means of a synchrotron or by exposure of ultraviolet rays; - Develop, that is to say remove by chemical means unpolymerized photoresist portions and thereby create a photoresist mold. electroforming a metal, generally non-magnetic nickel-phosphorus (NiP) type, in the mold obtained in order to obtain an anchor devoid of sting or a metal stinger. - To bring the electroformed metal layer to a predetermined thickness by mechanical machining and recover the anchor devoid of sting or sting after removal of the substrate and the photoresist.
    In the case of non-metallic anchor components made of silicon for example, the manufacturing process is based on selective chemical etching techniques, the most used in the watch industry is the DRIE (Deep Reactive Ion Etching) process. .
    The main advantage of these manufacturing techniques is to make mechanical parts of complex shapes and generally nonmagnetic with very high precision in X and Y and with a thickness of up to several millimeters.
    FIG. 3a shows a dart 16 having a male part 16a also called stard base with three flat faces intended to be driven into a corresponding female part formed by an orifice 20 made in the fork 15 shown in FIG. 2. The orifice 20 is extended by a slot 21 extending from an angle of the orifice 20 on the fork 15 to the rod 14 in the direction of the pivot axis 13. The slot 21 has a width from 5 to 50 microns while its length is defined by the elasticity of the material of the anchor 10 and determines the driving force and the holding force of the sting 16 in the orifice 20. FIG. 4 shows an orifice 20 extended by a slot 21 corresponding to the male portion 16a of the stinger 16 shown in FIG. 3a.
    The non-circular shape of the orifice 20 and the corresponding male part 16a of the dart 16 allow an orientation of the dart 16 in a given direction relative to the fork 15 and a precise positioning between the two horns 17 and 18 to equal distance from them. The angular accuracy of the orientation of the stinger 16 is of the order of 0.1 degree. No further adjustment of the dart 16 will then be necessary after assembly thereof on the anchor 10. This assembly can be performed automatically by a robot.
    In the examples shown in the figures, the slot 21 is preferably disposed along the axis 19 of the rod 14 so as to balance the mechanical stresses during the hunting of the dart 16.
    The shape of the orifice 20 and the complementary shape of the cross section of the male part 16a of the stinger 16 is chosen from the forms preventing the rotation of the male part 16a of the stinger 16 in the orifice 20. A form -circular like a triangle, a square, a rectangle or other polygon or any other shape different from a circle makes it possible to give a single possible value to the angle of orientation of the stinger 16 with respect to the axis 19 of the wand 14.
    It should be noted that the triangular shapes of the orifice 20 and the corresponding male part 16a of the dart 16 have been chosen for reasons of simplification. Other shapes are also possible with different arrangements of the slot 21 with respect to the orifice 20. Several slots extending contour portions of the orifice may also be envisaged.
    Fig. 3 5 shows a deformation of the orifice 20 having a slot 21 during a driving of a corresponding male portion 16a of the dart 16. The mechanical stresses cause a separation of the angles formed by the walls of the orifice 20 and a widening of the slit 21. The angles defined between each wall of the orifice 20 adjacent to the slit and the wall opposite to the slit increase by a value Aa depending on the angles formed by the corresponding faces of the male part 16a of the stinger 16. These angles of the faces of the stinger 16 are larger than those of the orifice 20 by a few fractions of degrees of angle, typically of the value Aa. The spacing of the angles is reflected on the slot 21 which widens towards a maximum value L at the contour of the orifice to gradually decrease towards the end of the slot 21 remote from the orifice 20.
    This difference Aa between the angles of the faces of the male part 16a of the stinger 16 and the corresponding angles of the orifice 20 makes it possible to press one face of the male part of the stinger 16a against the wall of the orifice opposite to the slot 21.
    The difference Aa between the values of the angles of the male portion 16a of the stinger 16 and those of the orifice 20 determine the force to be applied for the hunting. A typical value of this force is between 1 and 4N for an average holding of 2N. The slot 21 increases the elasticity of the orifice 20 by providing a greater amplitude of deformation than that of an orifice without slot. The advantage of this greater elasticity is to avoid breakage of the fork 15 which occurs when the elastic limit of the material itself is exceeded by the deformation. The elasticity of the orifice 20 or its ability to deform is proportional to the length of the slot 21. This length also influences the driving force which decreases as the length of the slot 21 increases. The slot 21 thus controls the force required to drive the sting 16 and its holding in the orifice 20 once chased.
    The presence of the slot 21 extending the orifice 20 prevents the formation of burrs due to tearing material of the walls of the orifice and the walls of the male part 16a of the dart 16 when their friction becomes excessive. Indeed, the increased deformation of the orifice 20 contributes to reducing this friction and therefore the formation of burrs. This absence of burrs avoids additional polishing operations of the fork 15 after assembly of the dart 16. A riveting of the dart 16 by flattening the end of the male portion 16a protruding from the orifice 20 is not necessary either. to the value of the holding force of the controlled hunting by the slot 21. This riveting was practiced when the holding force of the hunting was insufficient in a slot without slot.
    Alternatively, the orifice 20 may comprise at least one bulge 22 protruding on at least one wall of the orifice 20. A wall may comprise a single bulge 22 or more bulges 22 may protrude on one or more walls of the orifice 20. The example of FIG. 6 shows a bulge 22 on two walls. The corresponding male part 16a of the stinger 16 has flat walls without bulging as shown in FIG. 3a. These bulges 22 make it possible to improve the accuracy of the positioning or referencing of the stinger 16 relative to the fork 15 or to the pivot axis 13 of the anchor 10. The referencing may vary as a function of the deformation of the orifice 20 when hunting. In order to solve this problem, the bulges 22 position by pressing one face of the male part 16a of the stinger 16 against the wall of the orifice 20 opposite the slot 21. These bulges 22 make it possible to fix a precise value of the X or Y dimensions referencing the dart 16 during the driving in the orifice 20. The dimension X corresponds in the example of FIG. 1 at the distance between the tip of the stinger 16 and the end of the rod 14 between the horns 17 and 18 of the fork 15 and the Y dimension corresponds to the distance between the end of the stinger 16 and the pivot axis 13 of the anchor 10. The accuracy of referencing the dart 16 at the X and Y dimensions is of the order of 5 microns. The orientation of the stinger 16 is fixed by the non-circular shape of the orifice 20 and the corresponding male part 16a. A typical angular precision concerning the orientation of the stinger 16 relative to the axis 19 of the rod 14 is smaller or equal to 0.1 degree.
    FIG. 3b shows another variant in which, the male portion 16a of the stinger 16 has bulges 16b on two sides corresponding to the walls of the orifice 20 adjacent to the slot 21. These bulges 16b play the same role as the bulges 22 on the walls of the orifice 20 shown in FIG. 6, that is to say ensure accurate referencing of the sting 16. Indeed, the male part 16a of the stinger 16 of FIG. 3b is driven into a flat-walled orifice 20 as shown in FIG. 4. The bulges 16b deform the orifice 20 by spacing the angles a and the slot 21 as illustrated in FIG. 5 while pushing a face of the male portion 16a of the stinger 16 against the wall of the orifice 20 opposite the slot 21.
    As in the case of the orifice 20 illustrated in FIG. 6, the male portion 16a of the stinger 16 may comprise at least one bulge 16b protruding on at least one face of said male portion 16a. One face may comprise a single bulge 16b or several bulges 16b may protrude on one or more faces of the male portion 16a of the stinger 16.
    The dimensions of the bulges on the walls of the orifice or on the faces of the male part 16a of the stinger 16 may be between 10 to 200 microns for the width of the base and 5 to 30 microns for the height.
    According to another variant, illustrated in FIG. 7, a stinger 16 with a male portion 16a having bulges 16b as shown in FIG. 3b can be driven into an orifice 20 with bulges 22 on the walls as shown in FIG. 6. In order to maintain an orientation and a fixed referencing of the stinger 16 and avoid excessive deformation of the orifice 20, the bulges 22 on the walls of the orifice 20 are advantageously offset relative to the bulges 16b on the faces of the part 16. In this case, the offset is made so that the top of a bulge 16b of the face of the male portion 16a of the stinger 16 is supported on a flat portion of the wall of the orifice 20 and that the top of a bulge 22 of a wall of the orifice 20 bears on a flat portion of the face of the male part 16a of the stinger 16 when the stinger 16 is driven into the orifice 20.
    In summary, four configurations of the male portion 16a of the stinger 16 and the orifice 20 may occur: a) The faces of the male portion 16a of the stinger 16 and the walls of the orifice 20 are planar. The angles formed by the faces of the male portion 16a of the stinger 16 have a greater value of Aa than the corresponding angles formed by the walls of the orifice 20. b) The orifice 20 has bulges 22 on its walls adjacent to the slot 21 and the corresponding faces of the male portion 16a of the stinger 16 are planar. The bulges 22 of the orifice 20 make it possible to press one face of the male part 16a of the stinger 16 against the wall of the orifice 20 opposite the slit 21 in order to ensure accurate referencing of the stinger 16. c) The male part 16a of the stinger 16 has bulges 16b on the faces corresponding to the walls of the orifice 20 adjacent to the slot 21 and the walls of the orifice 20 are planar. In a similar manner to the previous configuration, the bulges 16b of the faces of the male part 16a of the stinger 16 make it possible to press one face of said male part 16a of the stinger 16 against the wall of the orifice 20 opposite the slot 21 in order to ensure accurate referencing of the dart 16. d) The male portion 16a of the dart 16 has bulges 16b on the faces corresponding to the walls of the orifice 20 adjacent to the slot 21 and the walls of the orifice 20 also comprise bulges 22 on its walls adjacent to the slot 21. The accurate referencing of the stinger 16 is ensured by the action of the two bulges pushing a face of the male portion 16a of the stinger 16 against the wall of the orifice 20 opposite the slot 21.
    In the four cases above, the mechanical stresses of deformation deform the orifice 20, as shown in FIG. 5, causing a spacing of the angles and the slot 21 extending said orifice 20.
    In another embodiment, the cutout configured to distribute and control mechanical stresses may be in the form of a rounded notch 24 cut on at least one angle of the orifice 20 as illustrated by the examples of triangular orifices. figs. 8a and 8b. The rounded notch 24 is disposed vertically over the entire thickness of the rod 14 at at least one angle of the orifice. For example, in the case of a polygonal orifice, the rounded notch 24 is advantageously arranged on one or more angles of the polygon where two walls of the orifice meet. This rounded notch 24 makes it possible to distribute the mechanical stresses around the angles of the orifice 20 and to control the driving force in order to avoid breaks on the fork 15 in a manner similar to the slot 21.
    According to another variant, illustrated in FIG. 9, the end of the slot 21 remote from the orifice 20 has a rounded notch 24 making it possible to improve the distribution of the mechanical stresses when the male part 16a of the stinger 16 is driven into the orifice 20. In fact, when the deformation of the orifice 20 and the subsequent spacing of the slot 21, mechanical stresses tend to concentrate at a single point at the end of the slot 21 of small width (5 to 50 microns). These mechanical stresses may cause breaks around the end of the slot 21 and compromise the strength of the fork 15. The rounded notch 24 of the end of the slot 21 distributes these mechanical stresses in a wider area around from this end so as to significantly reduce the risk of breakage.
    FIG. 10 shows an example of a triangular orifice with an angle extended by a slot 21 whose end has a rounded notch 24. The two other angles formed by the wall opposite the slot 21 and the walls adjacent to the slot 21 also comprise a rounded notch 24 of similar shape to the rounded notch 24 at the end of the slot 21.
    According to another variant illustrated in FIGS. 11a and 11b, a countersink 25 or a recess can be made parallel to the contour of the orifice 20. A countersink consists in enlarging the orifice 20 to a predefined depth so as to form a recess along the contour of the orifice 20 as shown in Figure 9b showing a section along an axis AA of the orifice 20 of Figure 9a. Typical dimensions for this counterbore 25 are between 5 to 10 microns for its width relative to the orifice 20 and between 20 and 100 microns for the depth of the recess The thickness of the anchor corresponding to the depth of the orifice 20 through is between 150 and 300 microns.
    In other words, this counter 25 enlarges the entire contour of the orifice 20 without the slot 21 of 5 to 10 microns.
    权利要求:
    Claims (12)
    [1]
    The countersink 25 allows a guidance or rather a pre-orientation of the dart 16 before the actual hunting of the male portion 16a in the orifice 20. Indeed, an error of orientation of the dart 16 before the application of the driving force can cause the formation of unwanted burrs. They are due to the tearing of material at the beginning of the driving before the sting 16 is oriented according to the angle defined by the shape of the orifice 20. According to another variant, the counterbore 25 can be made on one or more portions of the contour of the flushing orifice 20. For example, an oblique counterbore can be made on the walls adjacent to the slot 21 as shown in FIG. 12a. This counterbore has a width which decreases progressively from the slot to the wall opposite the slot 21. FIG. 12b shows in course the positioning of a male part 16a flat face of the dart illustrated in FIG. 3a. The counterbore 25 widens the orifice 20 to a depth of 20 to 100 microns allowing a guiding of the male part 16a of the stinger 16 until it is driven into the orifice 20. In the example of FIG. 12b, the flat faces of the male portion 16a of the stinger 16 are parallel to the walls of the counterbore 25 and the wall of the orifice 20 opposite the slot 21 has a width smaller than that of the counterbore 25. As a result, when the stinger 16 is driven into the orifice 20, the walls adjacent to the slot 21 deviate under the thrust of the faces of the male portion 16a of the dart 16 which rest entirely on these walls. The pressure exerted by the faces of the male portion 16a of the stinger 16 on the corresponding walls of the orifice is relatively constant from the slot to the corners with the wall opposite to the slot 21. This wall, without countersink, is used to support the corresponding face of the male portion 16a of the stinger 16 to allow accurate referencing of the stinger 16. [0045] FIG. 12c shows another variant of the hunting orifice of FIG. 12a with a lined position of the flat-faced male portion 16a of the stinger 16 of FIG. 3a. The flat faces of the male portion 16a of the stinger are parallel to the walls of the counterbore 25 and the wall of the orifice 20 opposite the slot 21 has a width equal to that of the countersink 25. In this case, when the stinger 16 is driven away in the orifice 20 the walls adjacent to the slot 21 deviate under the thrust of the faces of the male portion 16a of the stinger 16 which partially rest on these walls. The pressure exerted by the faces of the male portion 16a of the stinger 16 on the corresponding walls of the orifice decreases progressively from the slot to become negligible or zero at the angles with the wall opposite the slot 21. [0046] The counterbore 25 can also be applied to the variant in which the slot 21 is replaced by the rounded notch 24 as shown in FIG. 13. The counterbore may be parallel or oblique with respect to the walls of the orifice 20 as in the variants of orifices having a slot. In the case of a triangular orifice, the oblique counterbore is formed on the walls adjacent to the rounded notch 24, the width of the counterbore decreasing progressively from the rounded notch 24 to the wall opposite this notch 24. [ 0047] The variants illustrated in FIGS. 6, 7, 9, 10, 11a and 11b can be combined in various ways. For example, an orifice 20 may comprise both the bulges 22 of FIG. 6 and / or a rounded notch 24 at the end of the slot 21 of FIG. 9 and the counterbore 25 of FIGS. 11a and 11b. The example of fig. 11a combines the variant of FIG. 10 and a countersink 25 parallel to each wall of the orifice 20. Claims
    Anchor (10) of a timepiece escapement, comprising two arms (11, 12), a rod (14) connected to the two arms (11, 12), a pivot axis (13) located at a end of the rod (14), a fork (15) at the other end of the rod (14) and a dart (16) driven into the fork (15), the assembly of the fork (15) and the dard (16) being formed via a male portion (16a) integral with the stinger (16) and a female portion of complementary shapes preventing the rotation of the male part in the female part and arranged to achieve a positioning predetermined and oriented the stinger (16) relative to the fork (15), the female part forms a hunting hole (20) in the fork (15) in which the male part (16a) of the stinger (16) is driven, the anchor (10) is characterized in that the driving orifice (20) is increased by at least one cutout configured to distribute and control mechanical stresses due to the hunting of the sting (16) in the range (15).
    [2]
    2. Anchor according to claim 1 characterized in that the cutout configured to distribute and control mechanical stresses form a slot (21) of width and predetermined length extending the hunting hole (20).
    [3]
    3. Anchor according to claims 1 or 2 characterized in that the hunting orifice (20) has a polygonal shape.
    [4]
    4. Anchor according to claim 3 characterized in that the cutout configured to distribute and control mechanical stresses form a rounded notch (24) cut on at least one angle of the hunting hole (20).
    [5]
    5. Anchor according to claims 2 or 3 characterized in that the slot extends the hunting orifice (20) from an angle of said hunting orifice (20) parallel to a longitudinal axis (19) of the rod (14). ) in the direction of the pivot axis (13) of the anchor (10).
    [6]
    6. Anchor according to claim 5 characterized in that the slot (21) extending the flushing orifice (20) has a rounded notch (24) at the end remote from said flushing orifice (20).
    [7]
    7. Anchor according to any one of claims 1 to 6 characterized in that the male part (16a) of the stinger (16) and the hunting orifice (20) comprise planar faces, the faces of the male part (16a). ) of the stinger (16) forming angles greater than the angles formed by the walls of the corresponding hunting orifice (20), the difference Aa between the angles of the walls of the hunting orifice (20) and the angles formed by the faces of the male part (16a) of the stinger (16) causing a separation of the angles of the walls of the hunting orifice (20) and the slot (21) when the male part (16a) of the stinger (16) is driven into the hunting hole (20).
    [8]
    8. Anchor according to any one of claims 1 to 6 characterized in that the hunting orifice (20) comprises at least one bulge (22) projecting on at least one wall of said hunting hole (20, the part male (16a) of the dart (16) having planar faces.
    [9]
    9. Anchor according to any one of claims 1 to 6 characterized in that the male part (16a) of the stinger (16) comprises at least one bulge (16b) projecting on at least one face of said male part (16a) of the stinger (16) the hunting orifice (20) having plane walls.
    [10]
    10. Anchor according to any one of claims 1 to 6 characterized in that the hunting orifice (20) comprises at least one bulge (22) projecting on at least one wall of said hunting hole (20, the part male (16a) of the stinger (16) having at least one bulge (16b) projecting on at least one face, the bulges (22) of the walls of the orifice (20) being offset relative to the bulges (16b) of the faces of the male part (16a) of the dart (16).
    [11]
    11. Anchor according to any one of claims 8 to 10 characterized in that the hunting hole (20) is deformed by a spacing of the walls of said holes of said hole (20) and the slot (21) extending said hunting orifice (20), when the male part (16a) of the stinger (16) is driven into the hunting orifice (20).
    [12]
    12. Anchor according to any one of claims 1 to 11 characterized in that the flushing orifice (20) comprises a counterbore (25) on all or part of the contour of said flushing orifice (20).
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    同族专利:
    公开号 | 公开日
    CH713058B1|2021-01-29|
    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
    CH01396/16A|CH713058B1|2016-10-18|2016-10-18|Anchor featuring a sting hunted in a fork.|CH01396/16A| CH713058B1|2016-10-18|2016-10-18|Anchor featuring a sting hunted in a fork.|
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