FR3106583A1 - Capping device intended to be attached to the neck of a container - Google Patents

Abstract

The invention relates to a closure device intended to be fixed on a neck (2) of a container comprising a fastening flange (5), the closure device comprising:- a stopper (1);- a lower ring ( 9) fixed axially to the neck (2);- a hinge device (10) which connects the cap (1) to a second sector (17) of the lower ring (9);- the lower ring (9) does not comprise hooking elements (18) only in two hooking zones (20, 21) so as to allow radial movement of the lower ring (9) from front to rear, making it easier to pass a part of the second sector (17) on either side of the attachment collar (5) during the movement of the second sector (17) between a lowered position and a released position. Figure 5

Description

Capping device intended to be attached to the neck of a container

The invention relates to a closure device which is equipped with a stopper and allows said stopper to be kept attached to the neck of a container, which prevents the stopper from being lost in nature.

Technological background

Document ES1232089U discloses a stopper device which comprises a lower ring intended to be fixed axially on the neck of a container, a stopper comprising a thread intended to engage a complementary thread formed on the neck of the container and an articulation which binds the plug to the lower ring. The lower ring comprises hooking means provided to retain the lower ring to the neck of the container. The diameter section of the lower ring in which there are hooking means extends between 25 and 75% of the diameter of the lower ring. The section of the lower ring which is connected to the stopper by the articulation device is devoid of hooking means which allows said section to pivot between a lowered position and a raised position, in particular in order to allow the unscrewing of the stopper. . Furthermore, the cap comprises latching means intended to cooperate with complementary latching means provided in the lower ring and thus making it possible to maintain the cap in a tilted open position.

This closure device is not completely satisfactory. Indeed, despite the absence of hooking means in the section of the lower ring which is connected to the stopper by the articulation, the manipulations of the stopper to allow the section of the lower ring which is connected to the stopper to pivot towards a raised position when the plug has to be moved from the tilted open position to the closed position is not easy.

Abstract

An idea underlying the invention is to provide a closure device for keeping a stopper attached to the neck of the container which is reliable, easy to make and to use.

According to one embodiment, the invention provides a closure device intended to be fixed to a neck of a receptacle comprising an orifice and an attachment collar, the closure device comprising:
a stopper comprising an upper wall and an outer peripheral skirt, the outer peripheral skirt having a helical thread intended to cooperate with a helical thread provided on the neck so as to allow:
• unscrewing of the cap around an X axis in order to move the cap from a closed position in which the upper wall blocks the orifice of the neck and the outer peripheral skirt surrounds said neck to a released position in which the stopper n 'is more in touch with the cervix; and
• screwing the cap onto the neck in order to move the cap from the released position to the closed position;
- a lower ring fixed axially to the neck and movable in rotation on the neck around said axis X, said lower ring comprising a first sector which comprises hooking elements which project radially towards the inside of the lower ring and are intended to be arranged below the hooking flange so as to axially retain the lower ring on the neck of the container and a second sector, the first sector and the second sector of the lower ring being hinged to each other so as to so that the second sector pivots relative to the first sector between a lowered position in which the second sector is intended to be disposed below the hooking flange and a raised position in which the second sector is intended to be disposed at least partly above the hooking collar;
- an articulation device which connects the stopper to the second sector of the lower ring and is configured to allow the stopper to pivot between the released position and an open tilted position in which the stopper is released from the orifice of the neck;
- the lower ring being configured such that the second sector pivots relative to the first sector from the lowered position to the raised position during movement of the plug from the closed position to the released position and from the raised position to the lowered position during movement of the plug from the released position to the tilted open position;
- the first sector of the lower ring comprising a front zone which is diametrically opposed to the second sector and two fastening zones which are each arranged between the front zone of the first sector and the second sector, the fastening elements being only arranged in the two attachment zones so as to allow radial movement of the lower ring capable of facilitating the passage of a part of the second sector on either side of the attachment flange during the movement of the second sector between the position lowered and released position.

Thus, the tensile forces to be exerted on the lower ring to allow the second sector to move between the lowered position and the raised position are less, which makes it easier to use the closure device.

According to other advantageous embodiments, such a closure device may have one or more of the following characteristics.

According to one embodiment, the second sector is devoid of hooking elements.

According to one embodiment, the front zone of the first sector is devoid of fastening elements.

According to one embodiment, the hooking elements are protrusions which project radially inward.

According to one embodiment, the second sector extends over an angular range of between 90 and 150 °.

According to one embodiment, the front zone of the first sector extends over an angular range of between 90 and 150 °.

According to one embodiment, each of the two attachment zones extends over an angular range of between 30 and 90 °.

According to one embodiment, the articulation device extends over an angular sector which is cut into two equal parts by a bisecting plane Pb, the two attachment zones extending over angular sectors which are symmetrical to one another. with the other compared to the bisector plane Pb.

According to one embodiment, the articulation device extends over an angular sector which is cut into two equal parts by a bisecting plane Pb and the helical thread formed in the outer peripheral skirt of the plug develops around the axis X in a first direction and has a lower end and an upper end, the lower end of the helical thread being disposed in a second angular sector which is defined between the bisecting plane Pb and a radial plane positioned at 160 ° from the bisecting plane Pb according to a second meaning opposite to the first meaning.

This makes it easier to dock the cap on the neck when moving the cap from the tilted open position to the closed position.

According to one embodiment, the lower end of the helical thread is disposed in an angular sector which is defined between two radial planes respectively positioned at 90 ° and at 160 ° of the bisecting plane Pb according to the second direction of rotation.

According to one embodiment, the articulation device comprises two lamellae and the stopper device further comprises a device for blocking the stopper in the tilted open position, said blocking device comprising a tab which is formed in the outer peripheral skirt, between the two blades of the articulation device, and which is configured to bear against the neck of the container when the stopper is in the tilted open position, the heel having an internal face in which is formed at least one rib of the helical thread. This improves the pressure resistance of the closure device.

According to one embodiment, the invention also relates to an assembly comprising a container equipped with a neck comprising an orifice, a hooking collar and a helical thread and a aforementioned sealing device, the lower ring being fixed axially to the neck and movable in rotation on the neck about said X axis.

According to one embodiment, the stopper device further comprises a blocking device configured to block the stopper in the tilted open position, said blocking device comprising a stopper which projects radially outwards from the stopper and is configured to come in. bearing against the fastening collar of the neck during movement of the stopper from the tilted open position to the released position so as to exert on the second sector a tensile force having a component directed radially outwards and a component directed axially towards up to assist the movement of the second sector from the lowered position to the raised position.

This makes it even easier to use the capping device, especially when the stopper needs to be moved from the tilted open position to the closed position.

According to one embodiment, the stopper is configured so that, during movement of the stopper from the released position to the tilted open position, the stopper bears against an upper end of the second sector of the lower ring so as to move the stopper. second sector from the raised position to the lowered position.

This also makes it easier to use the closure device.

According to one embodiment, the locking device further comprises a heel which is formed in the outer peripheral skirt of the stopper and extends axially, the heel being configured to bear against a helical rib of the helical thread provided on the neck. of the container during movement of the stopper from the tilted open position to the released position so as to exert on the second sector a tensile force having a component directed radially outwards and a component directed axially upwards in order to assist the movement of the second sector from the lowered position to the raised position.

According to one embodiment, the articulation device comprises two blades and the heel is formed between the two blades.

In one embodiment, the cleat projects radially outwardly from the heel.

Brief description of the figures

The invention will be better understood, and other aims, details, characteristics and advantages thereof will emerge more clearly during the following description of several particular embodiments of the invention, given solely by way of illustration and not by way of limitation. , with reference to the accompanying drawings.

: is a three-quarter rear perspective view of a closure device.

: is a sectional view of a container neck intended to receive the closure device of the .

: is a side view of the closure device mounted on the neck of the container and showing the cap of the closure device in a released position in which it is no longer in engagement with the neck of the container.

: is a perspective view of the stopper device mounted on the neck of the container and showing the stopper of the stopper device in an open tilted position in which the stopper is released from the orifice of the neck.

: is a side perspective view of the closure device.

: is another side perspective view of the closure device.

: is a rear perspective view of the closure device.

: is a front perspective view of the closure device.

: is a sectional view of the stopper device mounted on the neck of the container and showing the stopper of the stopper device in an open tilted position in which the stopper is released from the orifice of the neck.

: is a sectional view of the stopper device mounted on the neck of the container and showing the stopper of the stopper device in an intermediate position between the released position and the tilted open position.

: is a perspective view of the closure device mounted on the neck of the container and showing the cap of the closure device in the tilted open position.

Detailed description of the invention

In the description and the figures, the X axis corresponds to the axis of rotation of the stopper 1 of the closure device when the latter is screwed onto the neck 2 of the container. By convention, the "radial" orientation is directed orthogonally to the X axis and the axial orientation is directed parallel to the X axis. The terms "external" and "internal" are used to define the relative position of a element relative to another, with reference to the X axis, an element close to the X axis is thus qualified as internal as opposed to an external element located radially at the periphery.

The terms "upper" and "lower" are used to define the relative position of one element with respect to another by reference to a position in which the orifice 3 of the neck 2 is directed upwards and the stopper 1 is in position. closed position on the neck 2 of the container, an element intended to be placed lower being designated by lower and an element intended to be placed higher being designated by upper. The terms "front" and "rear" are used to define the relative position of one element relative to another along a diameter perpendicular to the X axis.

In relation to FIGS. 1 to 10, an assembly is described below comprising a closure device, in particular shown in FIG. , and a container equipped with a neck 2, in particular shown in .

As shown on the , the neck 2 of the container has an upper end in which is formed an orifice 3 allowing the contents of the container to be poured out. The neck 2 of the container comprises a support collar 4 which projects radially outwards and a hooking collar 5 which also projects radially outwards and which is disposed axially between the support collar 4 and the orifice 3. A cylindrical portion is formed axially between the support collar 4 and the orifice 3. Furthermore, the neck 2 comprises, positioned axially between the attachment flange 5 and the orifice 3, a helical thread 6 formed of a series of helical ribs projecting radially outwards from an external surface of the neck 2. The helical thread 6 is intended to cooperate with a complementary helical thread 7 formed of a series of helical ribs which are formed in the stopper 1 of the capping device.

According to one embodiment, the helical thread 6 formed in the neck 2 as well as the helical thread 7 formed in the stopper 1 are interrupted. In other words, the adjacent helical ribs are separated by a space forming a vent and making it possible in particular to evacuate the gas present inside the container while the stopper 1 is still engaged on the neck 2.

The stopper device comprises a lower ring 9 which is retained on the neck 2 of the container, a stopper 1 which is intended to cover the orifice 3 of the container so as to close it, an articulation device 10 binding the stopper 1 to the lower ring 9 and a locking device arranged to lock the stopper 1 in a tilted open position, shown in Figures 4, 9 and 11. In the tilted open position, the plug 1 is disengaged from the orifice 3 of the container and does not interfere with the discharge of the contents of the container.

As illustrated in Figures 7 and 8, the articulation device 10 extends over an angular range S1 which is cut into two equal portions by a vertical bisecting plane Pb.

Returning to the , it is observed that the stopper 1 comprises an upper wall 13 intended to be disposed substantially orthogonally to the X axis, facing the orifice 3 of the neck 2 when said stopper 1 is in the closed position. The stopper 1 further comprises an outer peripheral skirt 14 intended to surround the neck 2 of the container when the stopper 1 is in the closed position. The outer peripheral skirt 14 extends, downwardly, perpendicular to the upper wall 13, from the outer periphery of said upper wall 13.

The outer peripheral skirt 14 has, on its inner face, a helical thread 7, visible in Figures 2 and 5 to 7, formed of a series of helical ribs which extend around the axis X in a first direction of rotation. The helical thread 7 is intended to cooperate with the helical thread 6 formed on the outer surface of the neck 2. Thus, the stopper 1 is able to be screwed onto the neck 2 in order to close the container and to be unscrewed from the neck 2 in order to 'open the container. The stopper 1 is thus movable between a closed position and a released position, shown in . In said released position, the plug 1 is no longer engaged with the neck 2. It is thus able to be tilted towards the tilted open position, shown in Figures 4, 9 and 11, in which the plug 1 is released from the orifice 3 of the neck 2 so that it does not interfere with the discharge of the contents of the container.

As shown in particular on the , the stopper 1 comprises an internal skirt 8, which extends perpendicularly downwards from the upper wall 13 of the stopper 1 and is dimensioned so as to fit inside the orifice 3 of the neck 2. The stopper 1 further comprises an annular lip 15 which extends, from the upper wall 13, radially between the inner skirt 8 and the outer peripheral skirt 14. The inner skirt 8 and the annular lip 15 are dimensioned such that when the stopper 1 is in the closed position, on the neck 2 of the container, the internal skirt 8 is in contact against the internal face of the neck 2 while the annular lip 15 is in contact against the external face of the neck 2. Thus, the skirt internal 8 and the annular lip 15 make it possible to ensure the tightness of the closure.

Advantageously, the lower ring 9 is, before the first opening of the container, connected to the stopper 1 by frangible bridges, not visible in the figures, intended to break when opening the stopper 1. These frangible bridges thus constitute inviolability witnesses.

The lower ring 9 is held axially on the neck 2 of the container while being able to rotate with respect to the latter around the axis X. As shown in FIG. , the lower ring 9 comprises two parts which are articulated to one another, namely a first sector 16 and a second sector 17 by which the lower ring 9 is linked to the stopper 1 by means of the articulation device 10.

According to one embodiment, the lower ring 9 has two thinned areas, that is to say the radial thickness of which is less than the radial thickness of the lower ring 9 outside said thinned areas. The two thinned zones delimit the first sector 16 and the second sector 17. The thinned zones thus form pivots allowing the articulation of the second sector 17 with respect to the first sector 16.

According to another embodiment, the lower ring 9 does not have thinned areas delimiting the first and second sectors 16, 17.

The second sector 17 is able to pivot upwardly relative to the first sector 16, between a lowered position in which the second sector 17 is intended to be disposed below the attachment flange 5 and a raised position, in which the second sector 17 is disposed at least in part above the hooking flange 5. This allows the stopper 1 to move upwards with respect to the neck 2 of the container, until the helical thread 7 of the stopper 1 disengages from the helical thread 6 provided on the neck 2 of the container. In other words, when the cap 1 is unscrewed, the lower ring 9 is rotated about the X axis while the second sector 17 of the lower ring 9 pivots relative to the first sector 16 to the position raised so as to allow an axial movement, upwards of the stopper 1, from the closed position, to the released position shown on the . When the plug 1 is pivoted from the released position to the tilted open position, the second sector 17 of the lower ring 9 pivots in the opposite direction with respect to the first sector 16 and then returns to the lowered position. Moreover, as described in more detail below, the second sector 17 also pivots relative to the first sector 16 from the lowered position to the raised position when the plug 1 is pivoted from the tilted open position to the released position.

The lower ring 9 is held axially on the neck 2 of the container by means of the hooking flange 5, in particular visible in Figures 5 to 7. The hooking flange 5 has a frustoconical outer surface that tapers upwards, c 'that is to say in the direction of the orifice 3 of the container. The attachment flange 5 defines, downwards, that is to say in a direction opposite to the orifice 3, a shoulder. The first sector 16 of the lower ring 9 comprises hooking elements 18 which cooperate with the hooking collar 5 provided on the container in order to axially retain the lower ring 9 to the neck 2 of the container. The hooking elements 18 are protuberances, shown in detail in particular in Figures 5 and 6, which protrude radially inwards from the first sector 16 of the lower ring 9. The hooking elements 18 have a dimension radial which increases, from the bottom to the top, that is to say in the direction of the upper edge of the lower ring 9. When assembling the stopper device on the neck 2 of the container, the hooking elements 18 slide against the frustoconical surface of the hooking flange 5 then lock by elastic return behind the hooking flange 5.

As shown in Figures 5 and 6, the first sector 16 of the lower ring 9 comprises a front zone 19 which is diametrically opposed to the second sector 17 of the lower ring 9 and two hooking zones 20, 21 which are arranged on either side. on the other side of the front zone 19 and are each arranged between the front zone 19 and the second sector 17 of the lower ring 9. The fastening elements 18 are only arranged in the two fastening zones 20, 21. Thus , due to the absence of hooking elements 18 in the front zone of the first sector 16, there is a radial clearance between the lower ring 9 and the neck 2 which allows the lower ring 9 to move from the front to back and vice versa. The radial play between the lower ring 9 and the neck 2 in the front / rear direction is for example between 0.5 and 1 mm. This makes it possible to facilitate the passage of a part of the second sector 17 on either side of the hooking flange 5 during the movement of the second sector 17 between the lowered position and the raised position. In other words, the tensile forces to be exerted on the lower ring 9 to allow the second sector 17 to pass on either side of the attachment collar 5 are less.

Advantageously, the second sector 17 extends over an angular range of between 90 and 150 °, and for example of the order of 120 °, the front part of the first sector 16 extends over an angular range of between 90 ° and 150 °, for example of the order of 120 °, while each of the two attachment zones 20, 21 extends over an angular range of between 30 and 90 °, for example of the order of 60 °.

Furthermore, the bisecting plane Pb cuts the second sector 17 and the front part of the second sector 17 into two equal parts. The angular ranges corresponding to the two attachment zones 20, 21 are therefore symmetrical to each other by compared to the bisector plane Pb.

The articulation device 10 is configured to allow the plug 1 to pivot between the released position, shown in FIG. , in which the outer peripheral skirt 14 extends downward from the upper wall 13 of the plug 1, and the tilted open position, shown in Figures 4, 9 and 11, in which the outer peripheral skirt 14 extends towards upwards from the upper wall 13 of the stopper 1. In the embodiment shown, the articulation device 10 comprises two strips 11, 12, in particular visible on the , which connect the stopper 1 and more particularly the outer peripheral skirt 14 of the stopper 1 to the lower ring 9, and more particularly to the second sector 17 of the lower ring 9. The two strips 11, 12 are symmetrical with respect to the bisecting plane Pb .

The locking device comprises a heel 22, in particular visible on the , which is provided in the outer peripheral skirt 14 of the cap 1. The heel 22 is disposed between the two strips 11, 12. The lower end of the heel 22 is advantageously located at the same height as the lower end of the peripheral skirt external 14. The heel 22 comprises a cleat 23 which extends circumferentially around the X axis and which projects radially outwards from the heel 22.

During movement of the stopper 1 from the released position to the tilted open position, the latch 23 bears against the upper end of the second sector 17 of the lower ring 9 which tends to return said second sector 17 to the lowered position.

Furthermore, during the movement of the cap 1 from the tilted open position to the released position, firstly, the latch 23 bears against the hooking flange 5, as shown in FIG. , so as to exert on the second sector 17 of the lower ring 9 a tensile force having a component directed radially outwards and a component directed axially upwards. This makes it possible to move the lower ring 9 from the front to the rear so as to press the front zone 19 of the first sector 16 of the lower ring 9 against the neck 2 of the container in order to facilitate the movement of the second sector 17 towards the back. raised position. This also makes it possible to assist the movement of the second sector 17 between the lowered position towards the raised position.

Then, as shown in the , during the movement of the plug 1 from the tilted open position to the released position, the outer surface of the heel 22 comes in a second step, in abutment against the upper surface of a helical rib of the helical thread 6 formed in the neck 2 of the container, which also makes it possible to exert on the second sector 17 a tensile force having a component directed radially outwards and a component directed upwards in order to move the second sector 17 to the raised position.

Moreover, as shown in the , the lower end 24 of the helical thread 7 formed on the inner face of the outer peripheral skirt 14, that is to say the start of the helical thread 7, is disposed in an angular range S2 which is defined between the bisecting plane Pb and a radial plane Pr positioned at 160 ° to the bisecting plane Pb in a second direction opposite to the first direction of rotation, that is to say to the direction of rotation of the helical thread 7 around the axis X. Thus, a lower front part 25 of the outer peripheral skirt 14 has no helical thread 7 which makes it easier to dock the stopper 1 on the neck 2 of the container. This arrangement is particularly advantageous when the stopper 1 is liable to appear in a position slightly offset towards the rear when it is docked on the neck 2 of the container. This is particularly the case, when the fastening elements 18 are absent from the front zone 19 of the first sector 16 and when, consequently, the lower ring 9 is able to move radially from the front to the rear with respect to at neck 2 of the container.

Advantageously, the lower end of the helical thread 7 is arranged in an angular range which is defined between two radial planes respectively positioned at 90 ° and at 160 ° of the bisecting plane Pb in a second direction of rotation opposite to the direction of the helical thread. 7 of cap 1.

Moreover, as shown in particular in Figures 8, 9 and 10, at least one of the ribs of the series of ribs of the helical thread 7 is formed in the internal face of the heel 22. In other words, at least l 'one of the ribs of the helical thread 7 is formed between the two strips 11, 12 of the articulation device 10. The presence of such a rib formed in the heel 22 makes it possible to increase the pressure resistance of the helical thread 7 and thus makes it possible to prevent the stopper 1 from opening unintentionally due to too much pressure in the container, in particular when the latter is intended to receive carbonated drinks.

The kinematics of stopper 1 is as follows. When unscrewing for the first time, the cap 1 leaves the closed position and moves away from the lower ring 9 to the released position, illustrated in the figure. . Frangible bridges break during this movement. In addition, during this movement of unscrewing the cap 1, the lower ring 9 is rotated around the axis X and the second sector 17 of the lower ring 9 pivots to the raised position as the cap 1 moves away from the hooking collar 5.

Subsequently, the cap 1 can then be pivoted rearwardly towards the tilted open position in which the outer peripheral skirt 14 extends upward from the top wall 13. During movement of the cap 1 towards the rear in the direction of its tilted open position, the latch 23 bears against the upper end of the second sector 17 of the lower ring 9 so that the second sector 17 of the lower ring 9 pivots from the raised position to the lowered position .

As shown on the , when the second sector 17 of the lower ring 9 is in the lowered position and the stopper 1 is in its tilted open position, the latch 23 bears against the hooking flange 5. Thus, the stopper 1 remains in its position. tilted open position since, due to this support of the tab 23 against the hooking flange 5, the stopper 1 cannot be pivoted to the released position in which the stopper 1 is opposite the dispensing orifice 3 as long as the second sector 17 of the lower ring 9 remains in the lowered position. This makes it possible to increase the minimum opening angle of the cap 1. Thus, advantageously, when the cap 1 is in its tilted open position and the second sector 17 of the lower ring 9 is in the lowered position, the The opening angle of the cap 1 is greater than 120 ° and advantageously greater than or equal to 145 ° and for example of the order of 180 °. The opening angle corresponds to the projecting angular sector which is formed at the intersection between a plane parallel to the upper wall 13 of the stopper 1 and a horizontal plane.

To close the cap 1, the user swings the cap 1 forward to the released position. During this tilting, the cleat 23 bears against the hooking flange 5 so as to exert on the second sector 17 of the lower ring 9 a tensile force having a component directed radially outwards, which makes it possible to move the lower ring 9 from front to rear and a component directed axially upwards which makes it possible to assist the movement of the second sector 17 of the lower ring 9 towards the raised position. The outer surface of the heel 22 also bears against a helical rib of the helical thread 6 which also facilitates the movement of the second sector 17 of the lower ring 9 towards the raised position.

When the second sector 17 is in the raised position and the stopper 1 is in the released position, said stopper 1 can then be screwed back onto the neck 2 of the container. During screwing, the lower ring 9 is rotated around the X axis and the second sector 17 of the lower ring 9 pivots towards the lowered position as the plug 1 approaches the collar of hooking up 5.

Advantageously, the entire closure device is molded in a single piece of synthetic material, such as polyethylene and advantageously high density polyethylene. Advantageously, the closure device is molded in the configuration of the , that is to say in a closed position, a position in which it can be directly mounted on the neck 2 of the container.

Although the invention has been described in connection with several particular embodiments, it is obvious that it is in no way limited thereto and that it comprises all the technical equivalents of the means described as well as their combinations if these come within the scope of the invention as defined by the claims.

The use of the verb "to comprise", "to understand" or "to include" and its conjugated forms does not exclude the presence of other elements or other steps than those set out in a claim.

In the claims, any reference sign in parentheses cannot be interpreted as a limitation of the claim.

Claims (12)

Capping device intended to be fixed on a neck (2) of a container comprising an orifice (3) and a fastening collar (5), the stopper device comprising:
- a plug (1) comprising an upper wall (13) and an outer peripheral skirt (14), the outer peripheral skirt (14) having a helical thread (7) intended to cooperate with a helical thread (6) formed on the neck (2) so as to allow:
unscrewing the cap (1) around an X axis in order to move the cap (1) from a closed position in which the upper wall (13) blocks the orifice (3) of the neck (2) and the skirt external peripheral (14) surrounds said neck (2) towards a released position in which the stopper (1) is no longer in engagement with the neck (2); and
screwing the stopper (1) onto the neck (2) in order to move the stopper (1) from the released position to the closed position;
- a lower ring (9) fixed axially to the neck (2) and movable in rotation on the neck (2) about said axis X, said lower ring (9) comprising a first sector (16) which comprises fastening elements ( 18) which project radially towards the inside of the lower ring (9) and are intended to be arranged below the hooking flange (5) so as to axially retain the lower ring (9) on the neck ( 2) of the container and a second sector (17), the first sector (16) and the second sector (17) of the lower ring (9) being articulated to each other so that the second sector ( 17) pivots relative to the first sector (16) between a lowered position in which the second sector (17) is intended to be disposed below the hooking flange (5) and a raised position in which the second sector ( 17) is intended to be disposed at least in part above the attachment flange (5);
- an articulation device (10) which connects the plug (1) to the second sector (17) of the lower ring (9) and is configured to allow the plug (1) to pivot between the released position and an open tilted position in which the stopper (1) is released from the orifice (3) of the neck (2);
- the lower ring (9) being configured such that the second sector (17) pivots relative to the first sector (16) from the lowered position to the raised position during movement of the plug (1) from the closed position towards the released position and from the raised position to the lowered position during movement of the plug (1) from the released position to the tilted open position;
- the first sector (16) of the lower ring (9) comprising a front zone (19) which is diametrically opposed to the second sector (17) and two hooking zones (20, 21) which are each arranged between the front zone (19) of the first sector (16) and the second sector (17), the hooking elements (18) being only arranged in the two hooking zones (20, 21) so as to allow a radial movement of the ring lower (9) adapted to facilitate the passage of a part of the second sector (17) on either side of the hooking flange (5) during the movement of the second sector (17) between the lowered position and the position released. A closure device according to claim 1, wherein the hooking elements (18) are protrusions which project radially inwardly. A closure device according to claim 1 or 2, wherein the second sector (17) extends over an angular range of between 90 and 150 °. A closure device according to any one of claims 1 to 3, wherein the front zone (19) of the first sector (16) extends over an angular range of between 90 and 150 °. A closure device according to any one of claims 1 to 4, in which each of the two attachment zones (20, 21) extends over an angular range of between 30 and 90 °. Capping device according to any one of claims 1 to 5, in which the articulation device (10) extends over a first angular range which is cut into two equal parts by a bisecting plane Pb, the two zones of attachment (20, 21) extending over angular sectors which are symmetrical to each other with respect to the bisecting plane Pb. Assembly comprising a container equipped with a neck (2) comprising a dispensing orifice (3), a hooking flange (5) and a helical thread (6) and a closure device according to any one of claims 1 to 8, the lower ring (9) being fixed axially to the neck (2) and movable in rotation on the neck (2) about said axis X. An assembly according to claim 7, wherein the closure device further comprises a locking device configured to lock the plug (1) in the tilted open position, said locking device comprising a tab (23) which projects radially outward. of the stopper (1) and is configured to bear against the hooking collar (5) of the neck (2) during movement of the stopper (1) from the tilted open position to the released position so as to exert on the second sector (17) a traction force having a component directed radially outwards and a component directed axially upwards in order to assist the movement of the second sector (17) between the lowered position towards the raised position. An assembly according to claim 8, wherein the latch (23) is configured so that, upon movement of the plug (1) from the released position to the tilted open position, the latch (23) bears against an upper end of the second sector (17) of the lower ring (9) so as to move it from the raised position to the lowered position. An assembly according to claim 8 or 9, wherein the locking device further comprises a heel (22) which is formed in the outer peripheral skirt (14) of the stopper (1) and extends axially, the heel (22) being configured to bear against a helical rib of the helical thread (6) provided on the neck (2) of the container during movement of the stopper (1) from the tilted open position to the released position so as to exert on the second sector ( 17) a tensile force having a component directed radially outwards and a component directed axially upwards in order to assist the movement of the second sector (17) from the lowered position to the raised position. Assembly according to Claim 10, in which the articulation device (10) comprises two blades (11, 12) and in which the heel (22) is formed between the two blades (11, 12). An assembly according to claim 10 or 11, wherein the cleat (23) projects radially outwardly from the heel (22).