CH704386A2 - Assembly for assembling e.g. hairspring, in opening of piece of time piece, has connecting system connecting piece and part and including ratchet device for linking movements of piece and part - Google Patents

Abstract

The assembly (19) has a connecting system (1) for connecting a piece (3) and a part (5). The system includes a ratchet device (11) for linking movements of the piece and the part. The device includes an elastic arm to form a unit of a pin (14) and a slot (16) to avoid relative movements between the piece and the part. The arm is formed in the piece and part. The pin projects into an opening (18) that is provided in a central area of the part.

Description

Field of the invention

The invention relates to a ratchet locking assembly and, more specifically, such an assembly allowing the use of fragile material, that is to say having no usable plastic field.

Background of the invention

Current assemblies comprising a piece of brittle material such as silicon are generally secured by gluing. Such an operation requires extreme finesse of application which makes it expensive.

Summary of the invention

The object of the present invention is to overcome all or part of the disadvantages mentioned above by proposing a fastening system not increasing the thickness of the respective members and being applicable to fragile materials.

For this purpose, the invention relates to an assembly of a part in the opening of a part characterized in that it comprises a securing system between the part and the part comprising at least one device to ratchet intended to make the movements of the piece and the part integral.

The invention therefore advantageously to secure two elements in the same plane, that is to say without increasing the thickness of the elements, and without plastic deformation may be, depending on the nature of the materials, potentially destructive.

According to other advantageous features of the invention: said at least one ratchet device comprises a resilient ratchet arm blocking a mortise and tenon type assembly to prevent relative movement between the part and the part; the arm is formed in the room; the arm also forms the tenon, the mortise being formed in the part; the arm has the mortise, the tenon being formed in the part; the arm forms a wall of the mortise, the rest of the mortise being formed in the piece and the tenon being formed in the part; the arm is formed in the part; the arm also forms the tenon, the mortise being formed in the piece; the arm has the mortise, the tenon being formed in the room; the arm forms a wall of the mortise, the remainder of the mortise being formed in the part and the tenon being formed in the part; the part is secured to an axis in order to mount the whole part -piece rotation.

Finally, the invention relates to a timepiece characterized in that it comprises an assembly according to one of the preceding variants.

Brief description of the drawings

Other features and advantages will clearly match the description which is given below, for information only and not limiting, with reference to the accompanying drawings, in which: <tb> - figs. 1 and 2 <sep> are representations of a first embodiment of a ratchet device according to the invention; <tb> - figs. 3 and 4 <sep> are representations of a second embodiment of a ratchet device according to the invention; <tb> - figs. 5 and 6 <sep> are representations of a third embodiment of a ratchet device according to the invention; <tb> - figs. 7 to 9 <sep> are partial representations of variants of the three embodiments of a ratchet device according to the invention.

Detailed Description of the Preferred Embodiments

As explained above, the invention relates to an assembly applicable to a fragile material, that is to say having no plastic field as a monocrystalline silicon-based material. This assembly was designed for applications in the watchmaking field. However, other areas can be perfectly imagined as including aeronautics, jewelry or automotive.

In the field of watchmaking, this assembly is made necessary by the increasing share of fragile materials such as those based on silicon, quartz, corundum or more generally ceramic. By way of example, it is possible to envisage forming the hairspring, the balance, the anchor, the bridges or even the mobiles such as the escape wheels wholly or partly based on fragile materials.

However, the fact of always being able to use usual steel axes whose manufacture is controlled, is a constraint that is difficult to reconcile with the use of parts not having a plastic field. Indeed, during tests carried out, the driving of a steel shaft is impossible and systematically breaks the fragile parts, that is to say not having a plastic field. For example, it has been found that the shear generated by the entry of the metal axis into the opening of a silicon part breaks the latter systematically.

Therefore, the present application proposes an assembly of a part, which can be integral with an axis, in the opening of a part, which can form a rotatably mounted part, characterized in that comprises a securing system between the part and the part comprising at least one ratchet device for rendering integral the movements of the part and the part.

Preferably, said at least one ratchet device comprises a resilient arm forming a ratchet blocking a set of type tenon-mortaise to avoid relative movements between the part and the part. It is therefore understood that neither the part nor the part are plastically stressed to become solid with respect to each other.

The fastening system between the part and the part will be better understood with the help of FIGS. 1 to 9 showing embodiments and non-exhaustive variants according to the invention. According to a first embodiment illustrated in FIGS. 1 and 2, the fastening system 1 comprises a single ratchet device 11. The ratchet device 11 comprises an arm 13 forming a pawl which is formed in the part 3. The arm 13 is thus resiliently mounted on the part 3 at a first end. 12 to form a ratchet as explained below. Finally, the arm 13 has at its second free end, a pin 14 which projects into the substantially central opening 18 of the part 3.

The ratchet device 11 also comprises a mortise 16 formed in the part 5 and intended to cooperate with the pin 14 of the arm 13 to secure the part 3 with the part 5. In FIG. 1, it can also be seen that the portion 5 has a recess 15 which flares out as it moves away from the mortise 16 which is intended to form a cam 17 for the post 14.

The ratchet device 11 of the securing system 1 between the part 3 and the part 5 is activated as explained below. First, part 3 and part 5 are manufactured. The manufacturing steps of parts 3 and 5 have no consecutive to respect and can even be performed at the same time.

In a first step, the portion 5 is introduced into the opening 18 of the part 3 so that the post 14 slides laterally into the recess 15 of the part 5 as shown in FIG. 1. In a second step, a relative rotational displacement of the portion 5 relative to the part 3 is then printed in order to slide the stud 14 against the cam 17 in order to gradually remove the stud 14 from the part 5 The relative movement is continued until the stud 14 tilts in the mortise 16 in order to elastically lock the tenon-mortise assembly 16 by the arm 13 forming a pawl as illustrated in FIG. 2.

It is therefore understood that the post 14 of the part 3 is secured in motion of the mortise 16 of the part 5 under the stress induced by the elastic return of the arm 13 forming a pawl. An assembly 19 is thus obtained whose fastening system 1 does not require the increase in the thickness of the members, that is to say of the part 3 and part 5, and which is applicable in particular to materials fragile.

Of course, the fastening system 1 may comprise a plurality of ratchet devices 11 mounted around the opening 18 of the piece 3. Similarly, the piece 3 may form all or part of a spiral, a pendulum , an anchor, a bridge or even a mobile like an escape wheel. Similarly, the portion 5 can be secured to an axis, a pin or more generally to any element in one piece, that is to say in one piece or with the aid of several parts.

According to a second embodiment illustrated in FIGS. 3 and 4, the fastening system 21 between the part 23 and the part 25 comprises three ratchet devices 31. Each ratchet device 31 comprises an arm 33 forming a pawl which is formed in the part 23. The arm 33 is thus mounted elastically on the piece 23 at a first end 32 to form a pawl as explained below. Finally, the arm 33 has at its second free end 27, a mortise 36 which projects into the substantially central opening 38 of the part 23.

Each ratchet device 31 also comprises a pin 34 formed in the portion 25 and adapted to cooperate with the mortise 36 of an arm 33 to secure the part 23 with the portion 25. In FIG. 3, it can also be seen that the piece 23 has a recess 35 which faces each free end 27 of an arm 33 having a mortise 36 and which is intended to form a clearance necessary for the elastic movement of said arm. Finally, the part 23 comprises, for each ratchet device 31, a stop 40 intended to center the part 25 in the opening 38.

The ratchet device 31 of the fastening system 21 between the part 23 and the portion 25 is activated as explained below. First, the part 23 and the part 25 are manufactured. The manufacturing steps of parts 23 and 25 have no consecutive to respect and can even be performed at the same time.

In a first step, the portion 25 is introduced into the opening 38 of the part 23 so that the pin 34 slides substantially against the stop 40 of the part 23 as shown in FIG. 1. In a second step, a relative rotational displacement of the portion 25 relative to the piece 23 is then printed in order to slide against the arm 33, the tenon 34 in order to gradually remove the free end 27 of the arm 33 of the portion 25. It is understood, during this relative movement, that the free end 27 of the arm 33 with the mortise 36 is moved progressively towards the recess 35. The relative movement is continued until the mortise 36 tilts by covering the tenon 34 to resiliently lock the assembly tenon 34 - mortise 36 by the arm 33 forming a pawl as illustrated in FIG. 4.

It is therefore understood that the pin 34 of the portion 25 is secured to the movement of the mortise 36 of the part 23 under the stress induced by the elastic return of the arm 33 forming a pawl. An assembly 39 is thus obtained whose fastening system 21 does not require the increase in the thickness of the members, that is to say of the part 23 and the part 25, and which is applicable in particular to materials fragile.

Of course the fastening system 21 may comprise more or less ratchet devices 31 mounted around the opening 38 of the part 23. Similarly, the part 23 may form all or part of a spiral, of a rocker, an anchor, a bridge or even a mobile as an escape wheel. Similarly, the portion 25 may be secured to an axis, a pin or more generally to any element in one piece, that is to say integrally or with the aid of several elements.

According to a third embodiment illustrated in FIGS. 5 and 6, the fastening system 41 between the part 43 and the part 45 comprises three ratchet devices 51. Each ratchet device 51 comprises a ratchet arm 53 which is formed in the part 43. The arm 53 is thus elastically mounted. on the piece 43 at a first end 52 to form a pawl as explained below. Finally, the arm 53 has at its second free end, a bead 47 intended to form a wall of the mortise 56 which projects into the substantially central opening 58 of the part 43. In addition, the part 43 comprises, for each device ratchet 51, a stop 60 for centering the portion 45 in the opening 58 but also to form the rest of the mortise 56 in cooperation with the bead 47.

Each ratchet device 51 also has a pin 54 formed in the portion 45 and adapted to cooperate with the mortise 56 formed by the stop 60 and the bead 47 to secure the part 43 with the portion 45. In FIG. 5, it can also be seen that the piece 43 has a recess 55 which faces each bead 47 of an arm 53 and which is intended to form a game necessary for the elastic movement of said arm.

The ratchet device 51 of the securing system 41 between the part 43 and the part 45 is activated as explained below. First, part 43 and part 45 are manufactured. The manufacturing steps of parts 43 and part 45 have no consecutive to respect and can even be performed at the same time.

At first, the portion 45 is introduced into the opening 58 of the part 53 as illustrated in Figure 1. In a second step, a relative rotational displacement of the portion 45 relative to the piece 43 is then printed to slide against the arm 53, the upper part of the pin 54 in order to gradually remove the bead 47 of the arm 53 of the portion 45. It is understood, during this relative movement, that the bead 47 of the arm 53 is thus moved progressively towards the recess 55. The relative displacement is continued until the bead 47 tilts by locking laterally the pin 54 to elastically trap the pin 34 between the stop assembly 60 - bead 47 forming the mortise 56 by the arm 53 forming a pawl as illustrated in FIG. 6.

It is therefore understood that the pin 54 of the portion 45 is secured in motion of the mortise 56 of the part 53 under the stress induced by the elastic return of the arm 53 forming a pawl. An assembly 59 is thus obtained whose fastening system 41 does not require the increase in the thickness of the members, that is to say of the part 43 and the part 45, and which is applicable in particular to materials fragile.

Of course, the fastening system 41 may comprise more or fewer ratchet devices 51 mounted around the opening 58 of the workpiece 43. Similarly, the workpiece 43 may form all or part of a spiral, a rocker, an anchor, a bridge or even a mobile as an escape wheel. Similarly, the portion 45 may be secured to an axis, a pin or more generally to any element in one piece, that is to say integrally or with the aid of several elements.

The three embodiments shown in FIGS. 1 to 6 all have in common to present an arm 13, 33, 53 mounted elastically on the part 3, 23, 43. It is obvious that the invention can not be limited to such a feature. Thus, figs. 7 to 9 show variants of the three embodiments above in which the arms 13, 33, 53 are resiliently mounted on the part 5, 25, 45.

According to a variant of the first embodiment illustrated in FIG. 7, the fastening system 1 comprises at least one ratchet device 11 which comprises an arm 13 resiliently mounted on the portion 5 at a first end 12 to form a pawl. In addition, the arm 13 has at its second free end, a pin 14. The ratchet device 11 also comprises a mortise 16 formed in the part 3 and intended to cooperate with the post 14 of the arm 13 to secure the part 3 with the part 5 in a manner opposite to the first embodiment .

Thus, in a first step, the portion 5 is introduced into the opening 18 of the piece 3 so that the post 14 slides laterally into the recess 15 of the piece 3. In a second step, a relative displacement in rotation of the part 5 with respect to the part 3 is then printed in order to slide the post 14 against the cam 17 in order to gradually remove the post 14 by report, in Exhibit 3. The relative movement is continued until the pin 14 tilts in the mortise 16 in order to resiliently lock the stud assembly 14 -mortaise 16 by the arm 13 forming a ratchet as shown in FIG. 7.

Therefore, the variant of FIG. 7 thus forms an assembly 19 whose stud 14 of the part 5 is integral in motion of the mortise 16 of the part 3 under the stress induced by the elastic return of the arm 13 forming a ratchet with the same advantages, applications , or alternatives explained for the first embodiment.

According to a variant of the second embodiment illustrated in FIG. 8, the fastening system 21 comprises at least one ratchet device 31 'which comprises an arm 33 resiliently mounted on the part 25 at a first end 32 to form a pawl. In addition, the arm 33 has at its second free end 27, a mortise 36. The ratchet device 31 also comprises a pin 34 formed in the part 23 and intended to cooperate with the mortise 36 of the arm 33 to secure the part 23 with the part 25 in a manner opposite to the second embodiment. . Finally, the portion 25 comprises, for each ratchet device 31, a stop 40 intended to center the portion 25 in the opening 38.

Thus, in a first step, the portion 25 is introduced into the opening 38 of the part 23. In a second step, a relative displacement in rotation of the portion 25 with respect to the piece 23 is then printed in order to slide against the arm 33, the tenon 34 in order to gradually remove the free end 27 relative to the piece 23 by bringing it progressively towards the recess 35. The relative movement is continued until the mortise 36 tilts covering the post 34 to resiliently lock the mortise tenon assembly 36 by the arm 33 forming a pawl as illustrated in FIG. 8.

Therefore, the variant of FIG. 8 thus forms an assembly 39, the pin 34 of the part 23 is made integral in motion mortise 36 of the portion 25 under the stress induced by the elastic return of the arm 33 forming a ratchet with the same advantages, applications or alternatives explained for the second embodiment.

According to a variant of the third embodiment illustrated in FIG. 9, the securing system 41 between the part 43 and the part 45 * comprises at least one ratchet device 51 which comprises an arm 53 resiliently mounted on the part 45 at a first end 52 to form a pawl. In addition, the arm 53 has at its second free end, a bead 47 intended to form a wall of the mortise 56 with a stop 60 formed in the portion 45. Preferably, the stop 60, as for the third embodiment, is also intended to center the portion 45 in the opening 58.

The ratchet device 51 also comprises a pin 54 formed in the piece 43 and intended to cooperate with the mortise 56 formed by the stop 60 and the bead 47 to secure the piece 43 with the part 45 in a reverse manner to the third embodiment. In addition, the portion 45 has a recess 55 which faces the bead 47 of the arm 53 to form a game necessary for the elastic movement of said arm.

Thus, in a first step, the portion 45 is introduced into the opening 58 of the part 53. In a second step, a relative displacement in rotation of the portion 45 with respect to the piece 43 is then printed in order to slide against the arm 53, the upper part of the pin 54 in order to gradually remove the bead 47 relative to the piece 43 by gradually bringing it towards the recess 55. The relative displacement is continued until the bead 47 tilts by laterally locking the pin 54 to elastically trap the stud 34 between the stop assembly 60 - bead 47 forming the mortise 56 by the arm 53 forming a ratchet as illustrated in FIG. 9.

Therefore, the variant of FIG. 9forms thus an assembly 59 whose stud 54 of the piece 43 is secured in motion to the mortise 56 of the portion 55 under the stress induced by the elastic return of the arm 53 forming a ratchet with the same advantages, applications or alternatives explained for the third embodiment.

Of course, the present invention is not limited to the example shown but is susceptible of various variations and modifications that will occur to those skilled in the art. In particular, for all the embodiments and / or their variants, there may be mentioned, by way of example, that the part 3, 3, 23, 23, 43, 43 and / or the part 5, , 25, 25, 45, 45 can be formed by a process of the LIGA type, that is to say a photolithography of a mold followed by the filling of the mold by electroplating, or by a process of the photolithography type. a mask followed by an engraving according to the openwork of the mask.

Therefore, the part 3, 3, 23, 23, 43, 43 and / or the part 5, 5, 25, 25, 45, 45 can be formed from many materials. as, for example, a metal, a metal alloy, based on a non-metallic material or even on the basis of any oxide, nitride or carbide.

It is also perfectly conceivable that the part 3, 3, 23, 23, 43, 43 and / or the part 5, 5, 25, 25, 45, 45 comprise at least two levels with distinct reasons for adding functions to them, such as, for example, a shoulder intended to block the assembly axially 19, 19, 39, 39, 59, 59,

In the case of the first embodiment and its variant illustrated in FIGS. 1, 2 and 7, it is not mandatory to provide the recess 15, 15 * forming cam 17, 17. It can therefore only be provided the mortise 16, 16 respectively on the part 5 and the piece 3.

Finally, on reading the embodiments and variants above, it is understood, according to the applications, that the assemblies 19, 19, 39, 39, 59, 59 can be of dimensions or shapes. different in particular at the arm 13, 13, 33, 33, 53, 53, the post 14, 14, 34, 34, 54, 54 and / or the mortise 16, 16, 36, 36, 56, 56 without departing from the scope of the present invention.

Claims (12)

1. Assembly (19, 19, 39, 39, 59, 59) of a portion (5, 5, 25, 25, 45, 45) in the opening (18, 18, 38) , 38, 58, 58) of a part (3, 3, 23, 23, 43, 43) characterized in that it comprises a securing system (1, 1, 21, 21 41, 41) between the workpiece (3, 3, 23, 23, 43, 43) and the part (5, 5, 25, 25, 45, 45) having at least one ratchet (11, 11, 31, 31, 51, 51) for making the movements of the workpiece (3, 3, 23, 23, 43, 43) and the part (5, 5 , 25, 25, 45, 45). 2. Assembly (19, 19, 39, 39, 59, 59) according to the preceding claim, characterized in that said at least one ratchet device (11, 11, 31, 31, 51, 51 ) comprises an elastic arm (13, 13, 33, 33, 53, 53) forming a pawl blocking a set of the tenon type (14, 14, 34, 34, 54, 54) - mortise (16, 16, 36, 36, 56, 56) in order to avoid relative movements between the workpiece (3, 3, 23, 23, 43, 43) and the part (5, 5, 25, 25, 45, 45). 3. Assembly (19, 39, 59) according to the preceding claim, characterized in that the arm (13, 33, 53) is formed in the part (3, 23, 43). 4. Assembly (19) according to the preceding claim, characterized in that the arm (13) also forms the pin (14), the mortise (16) being formed in the portion (5). 5. Assembly (39) according to claim 3, characterized in that the arm (33) comprises the mortise (36), the pin (34) being formed in the portion (25). 6. An assembly (59) according to claim 3, characterized in that the arm (53) forms a wall (47) of the mortise (56), the remainder of the mortise (56) being formed in the piece (43) and the tenon - (54) being formed in the part (5). 7. Assembly (19, 39, 59) according to claim 2, characterized in that the arm (13, 33, 53) is formed in the portion (5, 25, 45). 8. Assembly (19) according to the preceding claim, characterized in that the arm (13) also forms the pin (14), the mortise (16) being formed in the piece (3). 9. Assembly (39) according to claim 7, characterized in that the arm (33) comprises the mortise (36), the pin (34) being formed in the part (23). 10. An assembly (59) according to claim 7, characterized in that the arm (53) forms a wall (47) of the mortise (56), the remainder of the mortise (56) being formed in the part (5) and the pin (54) being formed in the part (3). 11. Assembly (19, 19, 39, 39, 59, 59) according to one of the preceding claims, characterized in that the part (5, 5, 25, 25, 45, 45) is integral with an axis to mount the whole part (5, 5, 25, 25, 45, 45) piece (3, 3, 23, 23, 43, 43) to rotation. 12. Timepiece characterized in that it comprises an assembly (19, 19, 39, 39, 59, 59) according to one of the preceding claims.