CH707904B1 - Ergonomic wristband for watch or jewel. - Google Patents

Abstract

The invention relates to an extension (1) external to a box (2) watch (3) or jewelry, which is removable, and comprises, for housing a subsidiary function or a particular component, at least one housing (20) which is delimited by a body (21) of substantially annular shape, this body (21) being held prisoner with clamping between, on the one hand a base (22), and on the other hand a cap (23) having an opening (24) at each housing (20) by fastening and clamping means. This cap (23) has elastic holding means continuous around and inside the opening (24), and this housing (20) preferably encloses a spherical mobile (32) projecting through said opening (24). The invention also relates to a middle part comprising such an extension, a watch case comprising such a middle part, a bracelet comprising such a box, and a watch comprising such a bracelet.

Description

Description

Field of the Invention [0001] The invention relates to an external extension for a watch case or jewel box.

In particular, the invention relates to an external extension for a watch case or jewel, said extension comprising, at a first end, first fixing means to said box at a first junction point and extending according to a first direction, and at a second end, second fastening means for attachment to a strand of a bracelet at a second junction point and extending in a second direction.

The invention also relates to a caseband for a watch case or jewel, having such an extension and extending in an axial direction.

The invention also relates to a watch case comprising, on both sides of such a middle that it comprises, a cover surrounding an ice, and a bottom.

The invention also relates to a bracelet comprising a box comprising such a middle part, and at least one strand attached to one of its ends to said second fastening means of such an extension, and at the other end to thirds fixing means that comprises the middle of said box, which box has a bottom orthogonal to an axial direction.

The invention also relates to a watch comprising such a bracelet.

The invention relates to the field of watch and jewelry bracelets, and more particularly bracelets developing around a central box carrying at least one watch movement and / or at least one component of jewelery or similar.

BACKGROUND OF THE INVENTION The personalization of watches and jewelery is a task that is always relatively complex, and does not fit well with mass production. This customization concerns as well the integration of components desired by the user, as the adaptation of the shape of the bracelet in general carrying the watch or jewelry.

The integration of additional functions or specific components to a timepiece or existing jewelry is often difficult, because of the low volume remaining generally available inside a watch case or jewelry, and, on the outside, the presence of horns, and, for a watch, organs controlling the functions of the watch.

The usual crimping technique for maintaining appearance components such as cut stones, beads, or the like, is effective, but does not allow easy exchange of these appearance components to change the overall appearance of the watch or jewel.

Maintaining a watch case or jewel on a bracelet is often insufficiently integrated into the design of the box.

The usual horns have a medium geometry, and do not adapt very well to the size of the smallest and largest wrists. The horns are, moreover, often unsightly, and can hurt the user.

Most bracelets are not very customizable to the morphology of the user. Fully articulated bracelets are often, or too loose, or too tight, and do not guarantee a regular and elegant shape in the vicinity of the box. SUMMARY OF THE INVENTION [0014] The invention proposes to facilitate the integration of an additional component into a watch case or jewel, whether this additional component consists of an aspect piece, or a functional component. technical such as an auxiliary control and / or display.

The invention allows to integrate such additional functions, both technical and aesthetic, bracelets assembled around a small box, as in the case of a lady's watch or a jewel with a box containing the cabochon of a gem.

In a particular embodiment, this additional function is performed around a mobile spherical mobile in three dimensions, and preferably manipulated by the user.

The invention proposes, still, to maintain such a watch strap or jewel integrated manner with respect to a central box.

The invention is concerned with a box devoid of horns.

The invention is to allow the personalization of a bracelet, including a price bracelet, the morphology of the user, by the implementation of removable components, secured in a secure manner after the sale, allowing choose pre-determined curvatures.

For this purpose, the invention relates to an external extension for a watch case or jewel, characterized in that said extension is removable, and in that it comprises, for housing an annex function or a particular component, at least one housing which is delimited by a body of substantially annular shape, said body being held prisoner with clamping between, on the one hand a base, and on the other hand a cap having an opening at each said housing, by fastening and clamping means or by screws.

According to one embodiment of the invention, said cap comprises elastic holding means continuous around and inside said opening.

According to one embodiment of the invention, said elastic holding means also constitute sealing means.

According to one embodiment of the invention, said extension comprises at least one spherical mobile of given diameter movable in said at least one housing and protruding through said opening.

According to one embodiment of the invention, said extension carries, on either side of a median axis, at a first end, first fixing means to a said box at a first junction point. and extending in a first direction, and at a second end, second attachment means for attaching it to a strand of a bracelet at a second junction point and extending in a second direction, said first direction and said second direction; second direction being distinct and secant.

The invention also relates to an external extension for a watch case or jewel, said extension comprising, at a first end, first fastening means to said box at a first junction point and extending in a first direction , and at a second end, second fastening means for fixing it to a strand of a bracelet at a second junction point and extending in a second direction, characterized in that said extension is removable, in that it comprises, for housing an auxiliary function or a particular component, at least one housing which is delimited by a body of substantially annular shape, in that said second direction is not merged with said first direction and is secante with it, in that said extension is arranged to form a part of a bracelet, and in that said first fixing means and said second means of fi xation together define a first center of curvature at the intersection of the normals at said first direction and said second direction respectively from said first junction point and said second junction point, in a plane passing through said first junction point and said second junction point; junction point and parallel to said first direction and said second direction.

According to one embodiment of the invention, said extension is arranged for housing an ancillary function and comprises for this purpose at least one housing which is delimited by a body of substantially annular shape, and said extension is a carrier , on either side of a central axis, said first fastening means and said second fastening means, said body being held prisoner with clamping between, on the one hand a base, and on the other hand a cap comprising a opening at each said housing, by fastening and clamping means or screws.

The invention also relates to a caseband for a watch case or jewel, having such an extension, and a middle part extending in an axial direction, characterized in that the middle part comprises at least one inclined axis implantation. with respect to said axial direction and arranged to receive at least one locking pin which comprises, in said first direction, a said extension.

The invention also relates to a watch case comprising, on both sides of such a middle that includes said box, a lid surrounding an ice, and a bottom, characterized in that said cover is still a hat a said extension, which is removable and which comprises, for the housing of a subsidiary function or a particular component, at least one housing which is delimited by a body of substantially annular shape held prisoner with clamping between, d ' one part a base, and secondly said cap having an opening at each said housing, by fastening and clamping means or screws.

The invention also relates to a bracelet comprising a watch case comprising such a case, and said bracelet comprising at least one strand attached at one of its ends to said second attachment means of such an extension, and, at the another end to third attachment means that comprises said middle of said box, which has a bottom orthogonal to an axial direction, characterized in that said bracelet is an articulated bracelet elliptical profile, a first focus of the ellipse is constituted by said first center of curvature.

The invention further relates to a watch comprising such a bracelet.

BRIEF DESCRIPTION OF THE DRAWINGS [0031] Other characteristics and advantages of the invention will appear on reading the detailed description which follows, with reference to the appended drawings, in which: FIG. 1 represents, schematically and partially, and in cross-section in the main plane of the bracelet, a watch comprising a bracelet according to the invention, with a box without horns containing a card for receiving particular extensions, here represented with, on either side of the box, a first extension enclosing a spherical mobile, and a second extension constituting an end link of the bracelet; fig. 2 is similar to FIG. 1, a detail of this first extension enclosing a spherical mobile; fig. 3 represents, schematically and in cross section in a plane orthogonal to that of FIG. 2, this same first extension; fig. 4 shows schematically and in plan view, the middle part of the box of FIG. 1; fig. 5 shows, schematically and in plan view, the box of FIG. 1 provided with the first extension; fig. 6 shows, schematically and in cross section in a plane parallel to that of FIG. 3, the area of attachment and locking of the first extension to the middle part; fig. 7 shows schematically and in a view from below, a central body of the first extension, shown in cross section in FIG. 8 with the detail in section of a trunnion, and in plan view in fig. 9; fig. 10 represents, schematically, and in cross section in the main plane of the bracelet, a wristwatch elliptical profile, and FIG. 11 similarly represents a round profile bracelet; fig. 12 shows the exploded main components of a watch case provided with such a first extension and enclosing a spherical mobile such a bead.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0032] The invention relates to the field of watch and jewelery bracelets, and more particularly to bracelets developing around a central box carrying at least one watch movement and / or at least one jewelery component or the like.

The invention proposes to maintain such a watch strap integrally with respect to the central box.

The invention is, here, more particularly described for a watch strap carrying a watch case. The jeweler-jeweler will extrapolate its characteristics for its own productions.

Advantageously, the invention allows the use of a watch case devoid of horns.

The invention attaches, still, to promote the creation of a determined curvature zone, and large amplitude, around the watch case, to avoid the current discontinuity between box and bracelet, unpleasant for the user.

To answer all of this problem, the invention relates to an extension 1 external to the watch case 2.

Such an extension 1 is designed, according to the invention, as the end of a bracelet 10.

FIG. 1 illustrates, on one side of a box 2, a first extension 1 having particular characteristics, and, on the opposite side of the box 2, another extension 1 consisting of a particular bracelet link 46.

The invention also proposes to integrate, at least one extension extending the watch case, at least one additional function, of a technical nature and / or aesthetic.

Thus, the invention relates to an external extension 1 for a box 2 of watch 3 or jewelry.

According to the invention, this extension 1 is removable, and it comprises, for housing an auxiliary function or a particular component, at least one housing 20 which is delimited by a body 21 of substantially annular shape. This body 21 is held prisoner with clamping between, on the one hand a base 22, and on the other hand a cap 23 having an opening 24 at each housing 20, by fixing and clamping means 25 or by screws .

Preferably, this cap 23 comprises elastic holding means 27 continuous around and inside the opening 24.

Advantageously, these elastic holding means 27 also constitute sealing means.

In a preferred embodiment, the extension 1 comprises at least one spherical mobile 32 of given diameter DS mobile minimum clearance in at least one such housing 20 and protruding through the corresponding opening 24.

This extension 1 comprises, at a first end 5, first fastening means 6 to the box 2 at a first junction point 11. These first fastening means 6 extend in a first direction D1.

The extension 1 comprises, at a second end 7, second attachment means 8 for attachment to a strand 9 of a bracelet 10 at a second junction point 12.

According to the invention, the extension 1 is removable, and the second attachment means 8 extend in a second direction D2 not coincides with the first direction D1 and secant with it.

The extension 1 forms part of a bracelet 10.

And these first fastening means 6 and the second fastening means 8 together define a first center of curvature CC1 at the intersection of the normal to the first direction D1 and the second direction D2 respectively from the first junction point 11 and the second junction point 12.

This extension therefore makes it possible to give a particular angle to a bracelet end, which is the resultant of a first exit angle of a middle part 4, and of the angle that the first direction D1 and the second together make. direction D2. In sum, the extension 1 creates a particular curvature of the bracelet 10 in the immediate vicinity of the box 2.

It is therefore possible, with a given box 2, to compose bracelets 10 of different shapes, by connecting to the box 1 particular extensions 1 with different angles a between the first direction D1 and the second direction D2 .

FIG. 10 illustrates a substantially elliptical bracelet profile obtained with the invention. The measurement of the wrist of the user makes it possible to determine the optimal eccentricity of the elliptical profile for maximum comfort of the user.

The choice of suitable extensions 1 allows to bring or away, as appropriate, the focus of the ellipse of the plane of symmetry of the bracelet 10. In a particular embodiment of this bracelet, the center of curvature CC1 constitutes a focus of the ellipse.

In a particular embodiment, this extension 1 is arranged for housing an auxiliary function, and comprises for this purpose at least one housing 20. This housing 20 is delimited by a body 21 of substantially annular shape.

The extension 1 carries, on either side of a central axis DM, first fastening means 6 and second fastening means 8. The body 21 is held prisoner with clamping between, a part of a base 22, and secondly a cap 23 having an opening 24 at each housing 20, by fixing and clamping means 25, in particular constituted by screws or the like.

When the extension 1 is designed for the reception of a mobile component, its base 22 comprises at least one inner bearing surface 26 with a low coefficient of friction, in particular "Teflon", "Delrin", POM, or similar.

For the maintenance of such a mobile in the housing 20, the cap 23 preferably comprises elastic holding means 27 continuous around the opening 24 and inside thereof, which ensure the cleanliness of the housing 20, and the elastic holding of the mobile. In particular, these holding means 27 also constitute sealing means, and are made of elastomer, or rubber, or the like (in particular NBR from 65 to 80 Shore A).

In particular, the housing 20 is arranged for receiving a spherical body of a given diameter DS greater than the smallest dimension of said opening 24, for holding prisoner of this spherical body in the housing 20.

In this embodiment, the corresponding bearing surface 26 is circumscribed to a sphere of this given diameter DS which it is tangent in at least three points.

And the elastic holding means 27 are then circumscribed to a sphere of this given diameter DS which they are tangent over their entire length. By "tangents" is meant that their compressed profile is geometrically tangential to the sphere, and preferably at a circle.

When the mobile inserted in the housing 20 of the extension performs a technical function, such as slider, control member, physical size sensor, display member, or other, the base 22 comprises, at the level of at least one bearing surface 26, detection means 28, which are arranged to detect the position in the space of this mobile inserted into the housing 20.

The base 22 preferably comprises transmission means 29, which are arranged to transmit a signal emitted by these detection means 28 to a control and control device 30, which can be located in the bracelet 10, or preferably in the box 2, or outside of the bracelet 10 and the box 2 that it carries. The control and control device 30 is advantageously incorporated in the box, for example in the movement of a watch, and allows the display and / or adjustment of particular functions under the control of the mobile 32.

In contrast, the mobile 32 may also behave as a receiver of motion pulses originating from a watch movement, for example for a three-dimensional display of moon phase or earth phase, the star being symbolized by a sphere driven by magnetic or similar fields generated inside the box 2.

The same extension 1 may comprise several mobiles 32, each in a housing 20, transmitters and / or receivers, according to linear or rotational movements.

In a particular embodiment of the first fixing means, the extension 1 comprises, at the body 21, at least one locking pin 270 projecting at the first junction point 11 in the first direction D1, and a shim locking 31 for the axial immobilization of this pin 270 when clamping the cap 23 on the base 22. For positioning in the other directions, the body 21 comprises one or more pins 271, or abutment faces, or the like .

In a preferred embodiment and illustrated in FIG. 1, the extension 1, in its variant with at least one housing 20, comprises at least one spherical mobile 32 of given diameter DS movable with minimum clearance in at least one such housing 20, and protruding through the opening 24. Such spherical mobile can be constituted by a pearl, a ball, or the like.

Advantageously, this at least one spherical mobile 32 comprises passive means 33 constituting a cursor identifying its position in space.

The spherical mobile 32 can thus operate in the manner of a mouse cursor, the mouse body being constituted by the extension 1.

The detection means 28 are then arranged to detect, or the position of the mobile 32, and / or its speed, and / or its acceleration, with respect to a non-detailed reference coordinate system here.

The invention also relates to a middle part 40, resulting from the transformation of a middle part 4, integrable in a box 2, and which comprises at least one interface zone with such an extension 1, and preferably two zones of substantially diametrically opposite interface with respect to the median axis DM of the middle part 4, defining an axial direction DA in which the middle part 4 extends substantially.

The box 2, and preferably the middle part 40, extends substantially in a plane P, in principle tangential to the bottom 45 of the box 2. The middle part 40 is arranged so that in one of these areas interface, when the extension 1 is fixed on the middle 40, its first direction D1 is oblique with respect to this plane P.

This middle part 40 thus comprises at least one implantation 41 of inclined axis with respect to the axial direction DA, and arranged for the reception of the first attachment means 6 of an extension 1, and in particular of at least one locking pin 270 that comprises, in the first direction D1, this extension 1.

As can be seen in FIGS. 1 and 10, the caseband comprises, in a particular embodiment, substantially diametrically opposed to this implantation 41, third attachment means 42 for its attachment, or to a strand 9 of a bracelet 10 at a third junction point 43 and extending in a third direction D3 not coincident with the first direction D1 and second direction D2 and secant with them, or as illustrated in the figures, with another extension 1 particular consisting of an end link 46, and defining a third direction D3 and a fourth direction D4. Preferably, the third direction D3 is symmetrical with the first direction D1, and the fourth direction D4 is symmetrical with the second direction D2, and they make the same angle with each other. Thus, the contact between the wrist of the user and the bracelet 10 is symmetrical on both sides of the box 2.

The invention also relates to a watch box 2 comprising, on either side of such a case 40, a cover 44 surrounding an ice 49 in a conventional and non-detailed manner here, and a bottom 45.

According to the invention, this cover 44 of the box 2 is a hat 23 that includes at least one extension 1, wherein at least one housing 20 is delimited by a body 21 held prisoner with clamping between, a part of a base 22, and secondly this cap 23 having an opening 24 at each housing 20, by means of fixing and clamping 25 or screws.

FIG. 1 illustrates a box where the cover 44 covers the middle part 4 and a single extension 1. In this version, the assembly formed by the middle part 4 and the extension 1 form, as visible in FIG. 5 in top view, the figure "8" characteristic of the manufacturer's fabrications. It is naturally possible to envisage a symmetrical configuration in which the cover 44 also covers the end link 46.

The assembly of the assembly is facilitated in this advantageous embodiment with a single component forming a cover of the box and cap of the extension. The sequence comprises the following operations: - assembly of the body 21 against the middle part 4, installation of the bezel constituted by the lid 44 also hat 23 (in particular eight-shaped) with screwing at six o'clock box through a through screw an insert, setting ice 49 covering only the middle part 4 (in most of the eight); - insertion of the mobile 32 in the body 21, screwing the base 22 of the extension 1 by screws 25 also holding the cap 23, and ensuring the support of the latter on the latch 31 to immobilize the trunnion 270. The mobile 32 is supported by pads F in POM or similar constituting the bearing surface 26, on the bottom, and by an O-ring 27 on the contour of the opening 24 of the cap 23; - casing of the dial and movement, visible in fig. 1, in the middle 4, and assembly by clipping or other of the bottom 45.

Claims (22)

In this particular embodiment, and in no way limiting, whose marks are visible in FIG. 12, the middle 4 carries a welded tube at three o'clock for the housing of the crown K winding and setting time, and the receipt of seals. It still wears at six hours an insert 42 mounted obliquely, preferably pre-mounted by guiding pins and orientation, and then welded. The same method of assembly is preferably applied to an insert constituting the second attachment means 8 and applied to the body 21 of the extension. The oblique implantation for the housing of the journal 270 of the extension, and pion orientation 271, is located twelve hours. The unscrewing of the screws 25 under the base 22 makes it possible to release the latch 31 and to extract the extension 1, and to replace it with another, of different geometry and / or carrier of another function or function. another element of decoration. The invention also relates to a bracelet 10 comprising at least one strand 9 attached at one of its ends to the second attachment means 8 of such an extension 1, and at the other end, or to third means 42 which comprises a middle part 40 of a box 2, or to fourth attachment means 48 that comprises an end link 46. This box 2 preferably comprises a bottom 45 orthogonal to the axial direction DA . In a particular embodiment the bracelet 10 is an articulated bracelet of elliptical middle profile, a first focus of the ellipse is constituted by the first center of curvature CC1. In the particular embodiment of FIG. 1, the bracelet 10 comprises a second extension 1 consisting of an end link 46, attached to the third fastening means 42. This end link 46 comprises, at a fourth junction point 47 of the fourth fastening means 48 for fixing the strand 9 oriented in a fourth direction D4 symmetrical with respect to the second direction D2. The third fastening means 42 and the fourth fastening means 48 together define a second center of curvature CC2 which is defined by the intersection of the normals at the third direction D3 and at the fourth direction D4 respectively from the third junction point 43 and of the fourth junction point 47. In this particular embodiment the second focus of the ellipse is constituted by the second center of curvature CC2 defined by a second extension 1 such that the end link 46, as visible on the fig. 1 and 10. In a particular embodiment, the ellipse is reduced to a circle, the bracelet 10 is an articulated bracelet of circular average profile, the first center of curvature CC1 and the second center of curvature CC2 coincide. In a variant, the strand 9 comprises an intermediate clasp. In another variant, it is one of the extensions 1, in particular the end link 46, which comprises the clasp of the bracelet 10. In a particular variant, the opening / closing command of the clasp is performed by the movement of a mobile 32 inserted in a housing 20 of an extension 1. [0090] The invention further relates to a watch 3 comprising such a bracelet 10. Claims 1. Extension (1) external for a box (2) of watch (3) or jewel, characterized in that said extension (1) is removable, and in that it comprises, for housing an ancillary function or a particular component, at least one housing (20) which is delimited by a body (21) of substantially annular shape, said body (21) being held prisoner with clamping between, on the one hand a base (22), and on the other hand a cap (23) having an opening (24) at each said housing (20), by fixing and clamping means (25) or by screws. 2. Extension (1) according to claim 1, characterized in that said cap (23) comprises elastic holding means (27) continuous around and inside said opening (24). 3. Extension (1) according to claim 2, characterized in that said elastic holding means (27) also constitute sealing means. 4. Extension (1) according to one of claims 1 to 3, characterized in that said base (22) comprises, for receiving a movable component, at least one bearing surface (26) with a low coefficient of friction. 5. Extension (1) according to one of claims 1 to 4, characterized in that said housing (20) is arranged for receiving a spherical mobile (32) of a given diameter (DS) greater than the most small dimension of said opening (24). 6. Extension (1) according to claims 4 and 5, characterized in that said at least one bearing surface (26) is circumscribed to a sphere of said given diameter (DS) of which it is tangential in at least three points. 7. Extension (1) according to claims 2 and 5, characterized in that said elastic holding means (27) are circumscribed to a sphere of said given diameter (DS) which they are tangent over their entire length. 8. Extension (1) according to claim 4, characterized in that said base (22) comprises, at at least one said bearing surface (26), detection means (28) arranged to detect the position in the space of a mobile inserted into said housing (20), and transmission means (29) arranged to transmit a signal emitted by said detection means (28) to a control and control device (30). 9. Extension (1) according to one of claims 5 to 7, characterized in that it comprises at least one said spherical mobile (32) of given diameter (DS) movable in said at least one housing (20) and salient through said opening (24). 10. Extension (1) according to claim 9, characterized in that said at least one spherical mobile (32) comprises passive means (33) constituting a cursor for identifying its position in space. 11. Extension (1) according to one of claims 1 to 10, characterized in that it is carrier, on either side of a central axis (DM), at a first end (5), first fastening means (6) to a said box (2) at a first junction point (11) and extending in a first direction (D1), and at a second end (7), second fastening means (8) ) for attachment to a strand (9) of a bracelet (10) at a second junction point (12) and extending in a second direction (D2), said first direction (D1) and said second direction (D2) ) being distinct and secant. 12. Extension (1) according to claim 11, characterized in that it comprises at least one locking pin (270) protruding at said first point of junction (11) in said first direction (D1), and a wedge of locking (31) for the axial immobilization of said pin (270) during the clamping of said cap (23) on said base (22). 13. Extension (1) external for a box (2) watch (3) or jewel, said extension (1) having, at a first end (5), first fastening means (6) to said box (2). ) at a first junction point (11) and extending in a first direction (D1), and at a second end (7), second attachment means (8) for attachment to a strand (9) of a bracelet (10) at a second junction point (12) and extending in a second direction (D2), characterized in that said extension (1) is removable, in that it comprises, for the housing of an auxiliary function or a particular component, at least one housing (20) which is delimited by a body (21) of substantially annular shape, in that said second direction (D2) is not coincident with said first direction ( D1) and secante with it, in that said extension (1) is arranged to form a part of a bracelet (10), and in that the said s first fixing means (6) and said second fastening means (8) together define a first center of curvature (CC1) at the intersection of the normals at said first direction (D1) and at said second direction (D2) respectively said first junction point (11) and said second junction point (12) in a plane passing through said first junction point (11) and said second junction point (12) and parallel to said first direction (D1) and said second direction (D2). 14. Carrure (40) for a box (2) watch (3) or jewel, having at least one extension (1) according to one of claims 1 to 13, and extending in an axial direction (DA) , characterized in that said middle part (4) comprises at least one implantation (41) of axis inclined with respect to said axial direction (DA) and arranged for the reception of at least one locking pin (270) which comprises a said extension (1), which comprises, at a first end (5), first fixing means (6) to said box (2) at a first junction point (11) and extending in a first direction (D1 ) according to which extends said at least one locking pin (270). 15. Carrure (40) according to claim 14, characterized in that said middle (4) comprises, substantially diametrically opposed to said implantation (41), third attachment means (42) for attachment to a strand (9). ) a bracelet (10) at a third junction point (43) and extending in a third direction (D3) not coincident with said first direction (D1) and second direction (D2) and secant with them. 16. Box (2) watch (3) having, on either side of a middle (40) according to claim 14 or 15 which comprises said box (2), a cover (44) surrounding an ice (49). ), and a bottom (45), characterized in that said cover (44) is still a cap (23) of a said extension (1) which is removable and which comprises, for housing a subsidiary function or d a particular component, at least one housing (20) which is delimited by a body (21) of substantially annular shape held prisoner with clamping between, on the one hand a base (22), and on the other hand said cap (23) ) having an opening (24) at each said housing (20), by fixing and clamping means (25) or by screws. 17. Bracelet (10) comprising a box (2) of watch (3) according to claim 16, said bracelet (10) having at least one strand (9) attached at one of its ends to said second fastening means (8) d a said extension (1) of the middle part 40, and at the other end to third attachment means (42) that comprises said middle part (40) of said box (2), which box (2) has a bottom (45) orthogonal to an axial direction (DA), characterized in that said bracelet (10) is an articulated bracelet of elliptical profile, a first focus of the ellipse is constituted by said first center of curvature (CC1). 18. Bracelet (10) according to claim 17, characterized in that it comprises, attached to said third fastening means (42), an end link (46) having, at a fourth junction point (47) fourths fastening means (48) for fixing said strand (9) oriented in a fourth direction (D4) symmetrical with respect to said second direction (D2), and in that said third fastening means (42) and said fourth means of fastener (48) together define a second center of curvature (CC2) which is defined by the intersection of the normals at said third direction (D3) and at said fourth direction (D4) respectively from said third junction point (43) and said fourth junction point (47) in a plane passing through said first junction point (11) and said second junction point (12) and parallel to said first direction (D1) and said second direction (D2), and characterized in that a second focus of said ellipse is constituted by said second center of curvature (CC2). 19. Bracelet (10) according to claim 17 or 18, characterized in that said bracelet (10) is an articulated bracelet of circular profile. 20. Bracelet (10) according to one of claims 17 to 19, characterized in that said strand (9) comprises an intermediate clasp. 21. Bracelet (10) according to claims 18 and 20, characterized in that said end link (46) constitutes said intermediate clasp. 22. Watch (3) comprising a bracelet (10) according to one of claims 17 to 21.