EP2643736B1 - Watch with a rigid casing-up, and casing-up method - Google Patents

Description

The invention relates to a watch with rigid casing and a method of casing such a watch.

Invention background

The fitting of a movement, that is to say the fixing of the movement in the case of a watch, is generally carried out by means of flanges screwed onto the movement and which are inserted in a groove provided on the inner circumference of the box, or using a casing circle.

It was proposed in European patent application no. EP 1,970,779 to carry out the casing using two superimposed casing circles between which the movement is maintained. These circles are themselves compressed between a part of the middle of the watch and the back of this watch. One of the circles is provided with a passage for the passage of a winding stem. An annular seal is provided to maintain this second circle, and therefore the movement, axially and radially.

The document US353961 describes a casing of a watch movement in a shell having an internal wall of frustoconical type.

Various studies, including those of the applicant, have shown that these casing solutions not only transmit a shock from the case to the movement, but amplify it. Thus, a movement fitted into a watch that receives a shock of 10,000 g is shocked by 25,000 g, that is to say amplified by a factor of 2.5.

One solution could be to insert a shock absorber such as an elastomer ring between the box and the movement, but this requires having a large volume available in the box.

Summary of the invention

The main objective of the invention is to propose a watch having improved impact resistance.

Surprisingly, it has been discovered that rather than softening the casing by using a shock absorber, quite satisfactory results could be obtained by stiffening it.

• une carrure ;
• un fond ;
• un mouvement ; et
• une bague d'emboîtage en contact avec la carrure ;

dans laquelle :

• la bague d'emboîtage présente une face circonférentielle interne dont le profil comporte au moins une zone Z, la tangente T à laquelle forme un angle α non nul et inférieur à 90 degrés avec l'axe X passant par le centre du mouvement et perpendiculaire au plan formé par ce dernier ;
• le mouvement est solidaire d'une face circonférentielle externe dont le profil comporte au moins une zone Z', la tangente T' à laquelle forme un angle α' non nul et inférieur à 90 degrés avec ledit axe X;
• lesdites faces circonférentielles interne et externe étant en contact l'une avec l'autre au niveau de leurs zones Z et Z' ;

cette montre étant caractérisée en ce qu'elle comprend en outre un élément de serrage vissé prévu pour exercer une pression sur la bague d'emboîtage ou le mouvement, de sorte à induire un serrage radial et axial du mouvement, la montre comprenant une butée destinée au serrage du côté du mouvement opposé à l'élément de serrage vissé.Thus, in accordance with claim 1, the subject of the invention is a watch with rigid casing comprising:

• a middle part;
• a fund ;
• a movement ; and
• a casing ring in contact with the middle part;

in which :

• the casing ring has an internal circumferential face, the profile of which comprises at least one zone Z, the tangent T at which forms a non-zero angle α less than 90 degrees with the axis X passing through the center of the movement and perpendicular to the plan formed by the latter;
• the movement is integral with an external circumferential face, the profile of which comprises at least one zone Z ', the tangent T' at which forms a non-zero angle α 'and less than 90 degrees with said axis X;
• said inner and outer circumferential faces being in contact with each other at their zones Z and Z ';

this watch being characterized in that it further comprises a screwed tightening element designed to exert pressure on the casing ring or the movement, so as to induce a radial and axial tightening of the movement, the watch comprising a stop intended when clamping the side of the movement opposite the screwed clamping element.

Such a casing has the particularity of exerting both a radial pressure and an axial pressure on the movement, that is to say that it combines an axial tightening (in a direction parallel to the axis passing through the center movement, perpendicular to the latter and connecting the bottom to the glass) with a radial clamping.

• une diminution spectaculaire, c'est-à-dire de 60% par rapport à un emboîtage classique à brides, de l'accélération subie par le mouvement, par exemple lors d'un choc sur une surface dure ;
• une élimination des risques de collision entre mouvement et carrure lors d'un choc ;
• une élimination des éléments d'emboîtage qui cassent suite à des chocs sévères (vis, vis collerettes, brides) ; et
• une plus grande fiabilité de l'emboîtage.

Thus, it increases the rigidity of the casing, which in particular brings the following advantages:

• a dramatic decrease, that is to say of 60% compared to a conventional flanged casing, of the acceleration undergone by the movement, for example during an impact on a hard surface;
• elimination of the risk of collision between movement and middle part during an impact;
• elimination of casing elements which break due to severe impacts (screws, flange screws, flanges); and
• greater reliability of the casing.

Such a solution is quite unexpected since current attempts to increase the impact resistance of watches are oriented towards diametrically opposed concepts, namely, making the middle part movement movement elastic and using polymers to absorb the energy of the watch. shock.

Furthermore, the invention also relates to a method for fitting a watch according to claim 15.

• a) introduction du mouvement dans la carrure ;
• a') le cas échéant, mise en place d'une bague auxiliaire d'emboîtage autour du mouvement ;
• b) mise en place de la bague d'emboîtage autour du mouvement ; et
• c) mise en place d'un élément de serrage vissé.

This process includes the following steps:

• a) introduction of the movement into the middle;
• a ') if necessary, fitting an auxiliary casing ring around the movement;
• b) placing the casing ring around the movement; and
• c) installation of a screwed clamping element.

Other characteristics and advantages of the invention will now be described in detail below in the description of various embodiments, therefore the characteristics can be combined, except, of course, in the event of technical incompatibility.

• figure 1 : un premier mode de réalisation de l'invention, en coupe ;
• figure 2 : le détail d'une bague d'emboîtage fendue utilisé dans le premier mode de réalisation de l'invention ;
• figure 3 : un deuxième mode de réalisation de l'invention, en coupe ;
• figure 4 : un troisième mode de réalisation de l'invention, en coupe ;
• figure 5 : un dessin plus complet du mode de réalisation de la figure 4, en coupe ;
• figure 5bis : une vue en perspective éclatée du mode de réalisation des figures 4 et 5 ;
• figures 6 à 10 : respectivement, un quatrième, cinquième, sixième, septième et huitième modes de réalisation de l'invention, en coupe ;
• figure 11 : une variante sans élément de serrage du mode de réalisation de la figure 10, en coupe ;
• figure 12 : une variante du mode de réalisation de la figure 1, en coupe ;
• figure 13 : une variante du mode de réalisation de la figure 4, en coupe ;
• figures 14, 14bis et 14ter : d'autres variantes du mode de réalisation de la figure 1, en coupe ;
• figure 15 : un neuvième mode de réalisation de l'invention, en coupe ;
• figure 16 : un détail du neuvième mode de réalisation de l'invention, en coupe ;
• figure 17 : un dixième mode de réalisation de l'invention, en coupe ;
• figure 18 : une bague auxiliaire d'emboîtage fendue utilisée dans le dixième mode de réalisation de l'invention ;
• figure 19 : une variante du mode de réalisation de la figure 1, en coupe ; et
• figure 20 : une autre variante du mode de réalisation de la figure 1, en coupe.

These embodiments refer to the appended figures which schematically represent:

• figure 1 : a first embodiment of the invention, in section;
• figure 2 : the detail of a split casing ring used in the first embodiment of the invention;
• figure 3 : a second embodiment of the invention, in section;
• figure 4 : a third embodiment of the invention, in section;
• figure 5 : a more complete drawing of the embodiment of the figure 4 , in section;
• figure 5bis : an exploded perspective view of the embodiment of the figures 4 and 5 ;
• figures 6 to 10 : respectively, a fourth, fifth, sixth, seventh and eighth embodiments of the invention, in section;
• figure 11 : a variant without clamping element of the embodiment of the figure 10 , in section;
• figure 12 : a variant of the embodiment of the figure 1 , in section;
• figure 13 : a variant of the embodiment of the figure 4 , in section;
• Figures 14, 14bis and 14ter : other variants of the embodiment of the figure 1 , in section;
• figure 15 : a ninth embodiment of the invention, in section;
• figure 16 : a detail of the ninth embodiment of the invention, in section;
• figure 17 : a tenth embodiment of the invention, in section;
• figure 18 : an auxiliary slotted casing ring used in the tenth embodiment of the invention;
• figure 19 : a variant of the embodiment of the figure 1 , in section; and
• figure 20 : another variant of the embodiment of the figure 1 , in section.

Detailed description of the invention

On the figure 1 partially shown is a first embodiment of a rigid case watch according to the invention.

This watch includes a middle part 1, a removable base 2, a movement 3, a casing ring 4 and a tightening element 5.

The movement casing ring 4 is generally made of a rigid and non-elastomeric material usually having a Young's modulus greater than 0.1 GPa and preferably greater than 50 GPa.

It is shown in more detail on the figure 2 . It preferably comprises a slot 6 which interrupts its circumference. The slot 6 makes it possible to improve the elastic deformation of the ring, the free ends bordering the slot 6 being able to approach each other by so as to reduce the inner diameter of the ring. In addition, the slot 6 allows the passage of a watch component such as a winding stem. The casing ring 4 also has an internal frustoconical circumferential face 8.

By "internal face" is meant in the present description a face facing the center of the ring, therefore of the movement.

Movement 3, part of which can be seen on the figure 1 , has an outer circumferential face 7 designed to be in contact with the inner frustoconical circumferential face 8 of the split casing ring 4.

By "external face" is meant in the present description, a face opposite the center of the ring, and therefore opposite the center of the watch.

On the figure 1 , the clamping element 5 is in the form of a ring bearing against the split casing ring 4 and provided on its outer circumference with a thread cooperating with an appropriate tapping provided on an axial internal face 11 of the middle 1.

The middle part 1 has a part 9 projecting radially towards the center. The movement 3 is in contact with an internal face 10 of the part 9, which acts as a stop.

The sectional view of the figure 1 shows that the tangent T to the straight (or generative) profile of the internal circumferential face 8 of the casing ring 4 forms a non-zero angle α with the general axis of the watch, namely, the longitudinal axis X passing through the center of movement 3 and perpendicular to the plane formed by the latter.

On the figure 1 , the opening of the angle α is on the side opposite the back 2 of the watch, that is to say that its top is located on the side of the back 2 of the watch and not of the side of a cover or dial (not shown in the figure) which would be close to part 9 of the middle part 1.

The movement 3 is integral with an external circumferential face 7. In the embodiment of the figure 1 , the outer circumferential face 7 is formed directly on the movement 3 itself, for example on the plate.

The tangent T 'to the rectilinear profile of this external circumferential face 7 forms with the axis X an angle α'.

To ensure the proper functioning of the system, the inner 8 and outer 7 circumferential faces are in contact with each other, forming substantially identical angles α and α 'with the axis X. It follows that the tangents T and T 'substantially merge.

As we can see on the figure 19 , we can alternatively reverse the inclination of the outer 7 and inner 8 circumferential faces, the angles α and α 'then open towards the bottom 2. The assembly / fitting can then be done by the dial side, the flange being able to serve as a clamping element 5. In this case, a stop 9 ′ must be provided on the side of the movement opposite to the clamping element, this stop can also be formed by the bottom.

Another alternative represented on the figure 20 is to make the clamping element 5 cooperate with the movement 3quater, the displacement of the clamping element then being directly applied to the movement. An additional variant consists in securing the casing ring directly to the middle part, for example by producing an internal circumferential face of the middle part having a frustoconical profile.

The angles α and α 'are generally at least 5 degrees, otherwise it is difficult to extract the movement during disassembly because of friction and adhesion.

They are at most 45 degrees, otherwise the efficiency of the axial clamping decreases because it takes a large vertical displacement to cause a weak radial clamping.

Preferably, the angles α and α 'are between 15 and 25 degrees.

So, as can be easily understood by looking at the figure 1 , by rotating the threaded ring 5 in the appropriate direction, the displacement of the latter is caused upward in the figure, that is to say towards the ring 4. The latter then in turn moves towards the high and approaches the internal face 10 of the middle part 9.

This tightening of the ring 4 has two effects, thanks to the cooperation of the frustoconical profiles of the casing ring 4 and the movement 3. It produces, on the one hand, a radial compression of the movement 3, facilitated by the existence of the slot 6 of the ring, and, on the other hand, an axial compression of the movement 3 which presses the latter against the projecting or abutment part 9 of the middle part 1.

On the figure 3 a second embodiment of the invention is shown.

In this embodiment, the movement 3bis is always integral with a circumferential frustoconical external face 13. However, this solidarity is no longer reflected by the presence of the circumferential frustoconical external face 13 on the movement 3bis itself, but by l 'Interposition of an auxiliary casing ring 12 which is itself integral with the movement 3bis.

This auxiliary movement casing ring 12 is generally made of a rigid and non-elastomeric material usually having a Young's modulus greater than 0.1 GPa and preferably greater than 50 GPa.

The circumference of the auxiliary casing ring 12 is preferably interrupted by a slot (not visible on the figure 3 but visible on the figure 18 ).

Preferably, the slot of the auxiliary casing ring 12 is oriented so as to be aligned with the slot 6 of the casing ring 4, so that the two slots form a passage for a winding stem.

Furthermore, in this embodiment, the movement 3bis has on its periphery a shoulder 15 intended to come into abutment against a shoulder 14 provided on an internal circumferential face of the auxiliary casing ring 12.

Thus, when the threaded ring 5 is screwed, it presses on the casing ring 4, which pushes the auxiliary casing ring 12 towards the center of the watch. Thanks to the axial contact between the auxiliary casing ring 12, and the periphery of the movement 3bis, the latter is compressed towards the center, over its entire periphery.

In addition, the screwing of the threaded ring 5 causes the displacement of the casing rings 4 and 12 upwards in the figure and, thanks to the contact between the shoulder 14 of the auxiliary casing ring 12 and the shoulder 15 movement 3bis, the latter is compressed against the internal face 10 of the part 9 of the middle part 1 which acts as a stop.

On the figure 4 a third embodiment of the invention is shown. The only difference between this embodiment and the second is that a cover 16 is interposed between the movement 3bis and the part 9 of the middle part 1. The cover 16 then forms a stop for the movement.

This cover 16 preferably includes a stud (not shown) which engages in a notch provided in the middle 1 in order to prevent the rotation of the cover 16. The movement 3bis being screwed onto the cover, the stud also guarantees the orientation of this movement with respect to the middle part 1.

The figure 5 is a more complete representation of the watch according to the figure 4 . The cover 16 can be, for example, a dial, a screen to reduce the effect of the magnetic field on the movement, or a calendar circle. The figure 5 further shows an annular seal 33 disposed between the bottom 2 and the threaded ring 5, which prevents the unscrewing of the threaded ring.

The figure 5bis is an exploded perspective view of a watch according to the figure 5 .

The figure 6 shows a fourth embodiment of the invention.

The concept of the invention is embodied here in another form, namely that the cooperation between the two conical profiles conjugate head to tail of the embodiments of the figures 1 , 3 , 4 and 5 is replaced by cooperation between two rounded parts which are turned towards one another and in contact with one another.

These rounded parts constitute internal and external circumferential faces. They can be in the form of an arc of a circle, an arc of an ellipse, or any other curve deemed suitable by a person skilled in the art.

So, as we can see on the figure 6 , the casing ring 4bis has an axial section formed by two parts 17 substantially in the form of a quarter disc, only one of which is visible in the figure, the other being imaginable by symmetry with respect to the axis X.

An auxiliary casing ring 12bis, which can have substantially the same shape as the ring casing 4bis, is in contact with the rounded part 17 of the latter by its rounded part 18.

The rings 4bis and 12bis are split in this embodiment. Although it is conceivable that they have the same internal diameter, which would not prevent them from cooperating because they are split, preferably, the internal diameter of the ring 4bis is greater than that of the ring 12bis .

The ring 4bis is disposed in a corner formed by the threaded ring 5 and the axial internal face 11 of the middle part 1. The two non-rounded faces 22 and 23 of the ring 4bis bear respectively on the threaded ring 5 and on the internal face axial 11 of the middle part 1.

The ring 12bis is arranged in a corner of the 3ter movement, this corner being formed by a shoulder 15bis and an axial circumferential external face 21. The two non-rounded faces 19 and 20 of the ring 12bis bear respectively on the shoulder 15bis of the movement 3ter and on the axial circumferential face 21 of the 3ter movement.

The rings 4bis and 12bis are offset relative to each other along the axis X. When tightening the threaded ring 5, the latter moves in the direction of arrow F and pushes the ring 4bis also into the direction of arrow F. The rounded part 17 of the ring 4bis then slides over the rounded part 18 of the ring 12bis, forcing the latter to move both towards its center and towards part 9 of the middle part 1. The part the auxiliary ring can also be directly integrated into the movement plate, similar to the embodiment of the figure 1 .

On the figure 7 a fifth embodiment is shown which is a simple variant of the embodiment of the figure 6 . Here, the 4ter and 12ter rings play the same role as the 4bis and 12bis rings respectively on the figure 6 , but they are completely rounded, that is to say that they have a toroidal shape.

On the figure 8 A sixth embodiment of the invention is shown. This embodiment has two major differences compared to that of the figure 3 : the auxiliary casing ring 12ter has an axial extension, the external axial circumferential face 24 of which is threaded. The clamping element is still a threaded ring 5bis but its thread is now internal. It is therefore a thread cooperating with the thread of the ring 12ter. The internal face 11 of the middle part 1 thus no longer needs to be tapped.

A cover 16 (for example a dial or screen) is interposed between the movement 3bis and the projecting part 9 of the middle part 1.

The threaded ring 5bis must be screwed here so that the ring 4 moves in the direction of the arrow F. It ensures a radial tightening, the axial tightening being produced by friction between the movement and the ring.

On the figure 9 a seventh embodiment of the invention is shown.

This embodiment has a major difference compared to that of the figure 4 . The clamping element is here an elastic element 5ter, such as a spring, bearing on the bottom 2 of the watch case.

On the figure 10 an eighth embodiment of the invention is shown.

In this embodiment, which is close to that of the figure 3 , the split auxiliary ring 12quater comprises, in addition to the shoulder 14 similar to that of the ring 12 of the figure 3 , an auxiliary shoulder 25.

The shoulder 14 and the auxiliary shoulder 25 thus form a groove in which is received the part 26 of the movement 3bis which has the largest diameter. The part 26 is inserted into this groove with a tight fit so that when the threaded ring 5 is screwed, the ring 12quater integrally drives the movement 3bis in the axial direction and compresses it integrally in the radial direction. Axial tightening is achieved by friction between the ring 12quater and the part 26. The movement can be inserted into the groove of the ring either by deforming the split ring, or by providing an insertion system by bayonet.

On the figure 11 a variant without clamping ring of the embodiment of the figure 10 in which the bottom 2 acts as a clamping element. In a similar configuration, the outer ring 4 could be threaded on its outer periphery and serve as a clamping element.

On the figure 12 a variant of the embodiment of the figure 1 wherein the movement 41 has a curved external circumferential face 18bis and the casing ring 4ter has a toric shape.

On the figure 13 a variant of the embodiment of the figure 4 with a 4ter casing ring having a toric shape.

On the figure 14 another variant of the embodiment of the figure 1 wherein the movement 41 has a curved outer circumferential face.

On the figure 14bis another variant of the embodiment of the figure 1 wherein the casing ring 42 has a curved internal circumferential face.

On the figure 14ter another variant of the embodiment of the figure 1 wherein the movement 41 and the casing ring 42 have, respectively, an outer circumferential face and an inner circumferential face curved.

• la bague d'emboîtage présente une face circonférentielle interne dont le profil, tel qu'on le voit en coupe longitudinale suivant l'axe X, comporte au moins une zone Z (non désignée), la tangente T à laquelle forme avec l'axe X un angle α non nul ;
• le mouvement est solidaire d'une face circonférentielle externe qui se situe soit sur le mouvement lui-même, soit sur une bague auxiliaire d'emboîtage elle-même solidaire du mouvement, le profil de cette face circonférentielle externe, tel qu'on le voit en coupe longitudinale suivant l'axe X, comporte au moins une zone Z' (non désignée), la tangente T' à laquelle forme avec l'axe X un angle α' non nul ;
• les faces circonférentielles interne et externe sont en contact l'une avec l'autre par l'intermédiaire de leurs zones Z et Z', les tangentes T et T' à ces zones se confondant, c'est-à-dire que les angles respectifs α et α' qu'elles forment avec l'axe X sont dans le cas idéal identiques, ou du moins proches.

As is clear from figures 12, 13 , 14, 14bis and 14 ter, we always find the following common characteristics:

• the casing ring has an internal circumferential face whose profile, as seen in longitudinal section along the axis X, comprises at least one zone Z (not designated), the tangent T which forms with the axis X a non-zero angle α;
• the movement is integral with an outer circumferential face which is located either on the movement itself, or on an auxiliary casing ring itself integral with the movement, the profile of this external circumferential face, as seen in longitudinal section along the axis X, comprises at least one zone Z '(not designated), the tangent T' to which forms with the axis X a non-zero angle α ';
• the inner and outer circumferential faces are in contact with each other via their zones Z and Z ', the tangents T and T' to these zones coinciding, that is to say that the angles respective α and α 'which they form with the axis X are in the ideal case identical, or at least close.

As we can see on the figures 12 , 14, 14bis and 14ter , zones Z and Z 'can be reduced significantly to a point, while in the embodiment of the figure 1 , in particular, they extend over all of the respective profiles of the internal and external circumferential faces.

In other words, in the case of the figures 12 , 14, 14bis and 14ter , the angles α and α 'vary according to the tightening and the position of the zones Z and Z'. In addition, the contact surfaces can be provided before assembly with tangents forming an angle α different from α ', so as to take account of any deformation during assembly.

Alternatively, it is also possible for the clamping element to act not on the casing ring, but on the movement. In this case, the orientation of the angle α, α ′ must be reversed, so that the pressure exerted by the ring induces a radial and axial tightening of the movement. The different variants can of course be combined with each other, as long as they are compatible.

The preferred solution is that the clamping element comes to act and exert pressure on the casing ring, with a stop disposed on the side of the movement opposite to the clamping element, in order to generate a radial and axial clamping of the movement.

On the figures 15 and 16 a ninth embodiment is shown, which is close to that of the figure 4 .

The auxiliary casing ring 27 has an axial extension 28 located in this case on the side axially opposite to the dial and provided, over the entire circumference of its internal axial face, with a groove 29.

The threaded ring 5 here has an inner diameter large enough to receive the axial extension 28.

As we can see better on the figure 16 , the groove 29 has the function of accommodating the outer lip 32 of a mass of automatic winding module and of limiting the displacement during an impact. The radial end faces 30 and 31 of the groove 29 in fact serve as stops for the external lip 32 of the mass. This has the advantage of preventing plastic deformation of the mass support and eliminates the risk of marking the bridges, the plate and the bottom 2.

Preferably, an anti-unscrewing seal 33 (also visible on the figure 5 ) is provided to avoid unscrewing the threaded ring 5.

On the figure 17 a tenth embodiment is shown which is a variant of that without cover of the figure 10 .

In order to reduce the number of parts of the watch, there is an auxiliary slotted casing ring 35 incorporating the various functions of the cover (interface with the middle part, indexing of the movement and axial stop).

The split slotted auxiliary ring 35 is visible on the figure 18 where it was returned from its position on the figure 17 .

Legs 36 are provided around the slot 37 in order to ensure the indexing of the movement. As a variant, they can be replaced by a pin driven into the middle part and which cooperates at least with the slotted auxiliary auxiliary ring 35.

A bore 38 visible on the figure 17 was formed on the side opposite to the threaded ring 5 to receive a dial.

Maintaining this ring during assembly is guaranteed by the fixing screws 39 received in a groove 40 and which no longer have an active function of maintaining movement once the casing has been made.

The casing therefore comprises the slotted casing ring 4, the slotted casing auxiliary ring 35, the threaded ring 5 and optionally an anti-unscrewing seal 33.

The axial maintenance of the movement is ensured by axial clamping and by friction.

This variant makes it possible to remove the cover, which is a bulky piece and subject to severe aesthetic constraints, as well as the anti-rotation stud to be welded to the cover.

Casing process

1. a) introduction du mouvement dans la carrure ;
2. b) mise en place de la bague d'emboîtage éventuellement fendue autour du mouvement ; et
3. c) mise en place de l'élément de serrage vissé.

The casing of the movement of a watch according to the first embodiment of the invention, comprises in particular the following successive steps:

1. a) introduction of the movement into the middle;
2. b) fitting of the casing ring possibly split around the movement; and
3. c) fitting of the screwed clamping element.

Alternatively, steps a) and b) can be reversed.

The casing of the movement of a watch according to the other embodiments further comprises, between steps a) and b), a step a ') of fitting the auxiliary casing ring possibly split around the movement.

In the case of the embodiment of figures 15 and 16 , in which the groove 29 provides stops for the oscillating mass, the method can further comprise a step of inserting the latter into the groove 29 then a step where it is secured to the movement in a known manner.

Claims (15)

1. A watch with a rigid casing-up, comprising:

   - a middle (1);

   - a bottom (2);

   - a movement (3, 3bis, 3ter, 3quater, 41); and

   - a casing-up ring (4, 4bis, 4ter, 42) in contact with the middle (1);

   in which:

   - the casing-up ring (4, 4bis, 4ter, 42) has an inner peripheral face (8, 17), of which the profile comprises at least one zone Z, the tangent (T) to which forms a non-zero angle (α) of less than 90 degrees with the axis (X) passing through the center of the movement (3, 3bis, 3ter, 3quater, 41) and perpendicular to the plane formed by the latter;

   - the movement (3, 3bis, 3ter, 3quater, 41) is integral with an outer peripheral face (7, 13, 18, 18bis), of which the profile comprises at least one zone Z', the tangent (T') to which forms a non-zero angle (α') of less than 90 degrees with the said axis (X);

   - the said inner (8, 17) and outer (7, 13, 18, 18bis) peripheral faces being in contact with each other in the Z and Z' regions thereof,

   characterized in that it also comprises a screwed tightening element (5, 5bis) provided for exerting pressure on the casing-up ring (4, 4bis, 4ter, 42) or the movement (3quater) so as to induce a radial and an axial tightening of the movement, the watch comprising an abutment (9; 9') for tightening on the side of the movement opposite the screwed tightening element.
2. The watch as claimed in claim 1, in which the angles (α) and (α') are substantially identical and/or in which the angles (α) and (α') lie between 5 and 45 degrees and/or in which the casing-up ring (4, 4bis, 4ter, 42) has a split (6).
3. The watch as claimed in one of claims 1 and 2, also comprising an auxiliary casing-up ring (12, 12bis, 12ter, 27, 35) integral with the movement (3bis, 3ter), and on which the said outer peripheral face (13, 18) is present.
4. The watch as claimed in claim 3, in which the auxiliary casing-up ring (12, 12bis, 12ter, 27, 35) is split.
5. The watch as claimed in one of claims 1 to 4, in which the inner peripheral face (8) of the casing-up ring (4; 4bis; 4ter; 42) is in the shape of a truncated cone or rounded or curved inwards.
6. The watch as claimed in one of claims 1 to 5, in which the outer peripheral face (7, 13) integral with the movement (3, 3bis) is in the shape of a truncated cone or rounded or curved inwards.
7. The watch as claimed in one of claims 3 and 4, in which the casing-up ring (4ter) and the auxiliary casing-up ring (12ter) are of toroidal shape.
8. The watch as claimed in one of the preceding claims, in which the tightening element (5, 5bis) exhibits the form of a threaded or tapped ring.
9. The watch as claimed in one of the preceding claims, additionally comprising an anti-unscrewing joint (33) in contact with the tightening element (5, 5bis).
10. The watch as claimed in one of preceding claims, without a cover, and in which the movement (3, 3bis, 3ter, 41) is in contact with the middle (1).
11. The watch as claimed in one of claims 1 to 9, additionally comprising a cover (16), the movement (3bis) being in contact with the said cover (16).
12. The watch as claimed in one of the preceding claims, in which the vertices of the angles α and α' lie on the side of the bottom (2) of the watch or in which the vertices of the angles α and α' lie on the side opposite to the bottom (2) of the watch.
13. The watch as claimed in claim 3 or 4 or 7, in which the auxiliary casing-up ring (27) comprises a throat (29) of which the radial faces (30, 11) are adapted to serve as an abutment, in particular for an outer lip (32) of a weight for an automatic winding module.
14. The watch as claimed in one of preceding claims, in which the movement bears against the abutment or in which the casing-up ring bears against the abutment.
15. A method for casing-up a movement of a watch as claimed in one of the preceding claims in a middle (1), comprising the following steps:

    a) introduction of the movement (3, 3bis, 3ter, 3quater, 41) into the middle (1);

    a') where appropriate, installation of an auxiliary casing-up ring (12, 12bis, 12ter, 27, 35) around the movement (3bis, 3ter);

    b) installation of the casing-up ring (4, 4bis, 4ter, 42) around the movement (3, 3bis, 3ter, 41, 3quater); and

    characterized in that it also includes the installation of a screwed tightening element (5, 5bis, 5ter) intended to apply pressure to the casing-up ring (4, 4bis, 4ter, 42) or the movement (3quater) so as to induce a radial and an axial tightening of the movement, the watch comprising an abutment (9; 9') for tightening on the side of the movement opposite the tightening element.

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