CN115298105A

CN115298105A - Closure device for a container neck

Info

Publication number: CN115298105A
Application number: CN202180021707.9A
Authority: CN
Inventors: 弗朗西斯科·哈维尔·贝罗亚加西亚
Original assignee: Betapack SA
Current assignee: Betapack SA
Priority date: 2020-01-24
Filing date: 2021-01-25
Publication date: 2022-11-04
Also published as: EP4095062B1; AR121111A1; BR112022014595A2; ES2845224B2; PT4095062T; FR3106583B1; UY39035A; JP2023511968A; EP4095062A1; ES2973096T3; ES2845224A1; FR3106583A1; WO2021148705A1

Abstract

The invention relates to a closure intended to be fixed to a neck (2) of a container comprising an engagement collar (4), comprising: -a lid (1); -a lower ring (9) axially fixed to the neck (2); -and a hinge means (10) joining the cover (1) to the second section (17) of the lower ring (9); -the lower ring (9) has engagement elements (18) only in two engagement areas (20, 21) to allow radial movement of the lower ring (9) from front to rear facilitating passage of a portion of the second section (17) through each side of the engagement collar (5) during movement of the second section (17) between the lowered position and the release position.

Description

Closure device for a container neck

Technical Field

The present invention relates to a closure device equipped with a cap and makes it possible to keep said cap fixed to the neck of a container, thus avoiding the complete loss of the cap.

Background

Document ES1232089U discloses a closure device comprising a lower ring designed to be axially fixed on the neck of a container, a cap comprising a thread designed to engage with a complementary thread formed on the neck of the container, and a hinge joining the cap with the lower ring. The lower ring comprises engagement means arranged to hold the lower ring with the neck of the container. The section of the diameter of the lower ring where the engagement means are present extends between 25% and 75% of the diameter of the lower ring. The section of the lower ring connected to the lid by the hinge means is free of engagement means, which allow said section to be rotated between a lowered position and a raised position, in particular to unscrew the lid. In another aspect, the lid comprises ratchet means intended to cooperate with complementary ratchet means formed in the lower ring and thus allow the lid to be held in a tilted open position.

Such capping devices are not entirely satisfactory. In fact, although there are no engagement means in the section of the lower ring connected to the lid by the hinge, it is not easy to operate the lid to allow the section of the lower ring connected to the lid to rotate into the raised position when the lid is to be moved from the tilted open position to the closed position.

Disclosure of Invention

The main idea of the present invention is to propose a closure device that allows to keep the cap attached to the neck of the container and is reliable, easy to make and use.

According to one embodiment, the invention provides a closure intended to be fixed to a neck of a container comprising an orifice and an engagement collar, comprising:

-a cap comprising a top wall and a peripheral skirt having a helical thread designed to cooperate with a helical thread formed in the neck to allow:

unscrewing the cap about the axis X to move the cap from a closed position, in which the upper wall closes the aperture of the neck and the outer peripheral skirt surrounds said neck, to a release position, in which the outer peripheral skirt surrounds said neck

In the rest position, the cap is no longer coupled to the neck; and

screwing the cap on the neck to move the cap from the release position to the closed position;

-a lower ring axially fixed to the neck and rotatably movable on the neck about said X-axis, said lower ring comprising a first section comprising an engagement element projecting radially into the lower ring and intended to be arranged below the engagement collar to axially retain the lower ring on the neck of the container, the first and second sections of the lower ring being hinged to each other such that the second section rotates relative to the first section between a lowered position in which the second section is intended to be arranged below the engagement collar and a raised position in which the second section is intended to be arranged at least partially above the engagement collar;

-a hinge attaching the cap to the second section of the lower ring and configured to allow the cap to rotate between a release position and a tilted open position in which the cap is released from the aperture of the neck;

the lower ring is configured to rotate the second section from the lowered position to the raised position relative to the first section when the lid is moved from the closed position to the release position, and to rotate the second section from the raised position to the lowered position relative to the first section when the lid is moved from the release position to the tilted open position;

the first section of the lower ring comprises a front region diametrically opposite the second section and two engagement regions each arranged between the front region of the first section and the second section, the engagement elements being arranged only in the two engagement regions to allow radial movement of the lower ring to facilitate passage of a portion of the second section through each side of the engagement collar during movement of the second section between the lowered position and the release position.

In this way, the following tensions are small: this tension will be exerted on the lower ring to allow the second section to move between the lowered and raised positions, which facilitates the use of the closure device.

According to other advantageous embodiments, this type of capping device may have one or more of the following features.

According to one embodiment, the second section has no engaging elements.

According to one embodiment, the front region of the first section is free of engaging elements.

According to one embodiment, the engagement elements are radially inwardly projecting protrusions.

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

According to one embodiment, the front region of the second section extends over an angular range comprised between 90 ° and 150 °.

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

According to one embodiment, the hinge means extend in angular segments cut in two equal parts by the bisecting plane Pb, the two joining zones extending in angular segments symmetrical to each other about the bisecting plane Pb.

According to one embodiment, the hinge means extend in an angular segment cut in two equal parts by a bisecting plane Pb, and the helical thread formed in the outer peripheral skirt of the cap extends in a first direction about the axis X and has a lower end and an upper end, the lower end of the helical thread being arranged in a second angular segment defined between the bisecting plane Pb and the following radial plane: the radial plane is positioned opposite to the first direction at an angle of 160 deg. to the bisecting plane Pb. This facilitates the attachment of the cap to the neck when the cap is moved from the tilted open position to the closed position.

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

According to one embodiment, the hinge means comprise two foils and the capping device further comprises means for locking the lid in the tilted open position, said locking means comprising a stop formed in the peripheral skirt between the two foils of the hinge means and configured to rest against the neck of the container when the lid is in the open tilted position, the heel having an inner side formed with at least one rib of a helical thread. This makes it possible to improve the pressure resistance of the capping device.

According to an embodiment, the invention also relates to an assembly comprising a container equipped with a neck comprising an orifice, an engagement collar and a helical thread as described above, and a closure device as described above, the lower ring being axially fixed to the neck and being rotatably movable on the neck about said axis X.

According to one embodiment, the closure device further comprises a locking device configured to lock the lid in the tilted open position, said locking device comprising a stop projecting radially outwards from the lid and configured to rest against the engagement collar of the neck during movement of the lid from the tilted open position towards the release position, to exert a tension force on the second section having a radially outwards directed component and an axially upwards directed component to facilitate movement of the second section from the lowered position to the raised position. This makes it possible to further facilitate the use of the closure device, in particular when the lid is to be moved from a tilted open position to a closed position.

According to one embodiment, the stop is configured such that during movement of the cover from the release position to the tilted open position, the stop rests against an upper end of the second section of the lower ring to move the second section from the raised position to the lowered position. This also makes it easier to use the capping device.

According to one embodiment, the locking means further comprise a heel formed in the outer peripheral skirt of the lid and extending axially, the heel being configured to rest against a helical rib of a helical thread formed on the neck of the container during movement of the lid from the tilted open position to the release position to exert a tension on the second section, the tension having a radially outwardly directed component and an axially upwardly directed component to facilitate movement of the second section from the lowered position towards the raised position.

According to one embodiment, the hinge arrangement comprises two foils and the heel is formed between the two foils.

According to one embodiment, the stop projects radially outwardly from the heel.

Drawings

The invention will be better understood and other objects, details, features and advantages thereof will become more apparent in the following description of several specific embodiments thereof, which is provided by way of illustration and not of limitation with reference to the accompanying drawings.

Fig. 1 is a three-quarter perspective view of a closure.

Fig. 2 is a cross-sectional view of a container neck intended to receive the closure of fig. 1.

Fig. 3 is a side view of the closure mounted on the neck of a container and shows the cap of the closure in a release position in which the cap is no longer engaged with the neck of the container.

Fig. 4 is a perspective view of the closure mounted on the neck of the container and shows the cap of the closure in an inclined open position with the cap released from the orifice of the neck.

FIG. 5 is a side perspective view of the closure.

Fig. 6 is another side perspective view of the closure.

Fig. 7 is a rear perspective view of the closure.

Fig. 8 is a front perspective view of the closure.

Fig. 9 is a cross-sectional view of the closure mounted on the neck of the container and shows the cap of the closure in an inclined open position with the cap released from the orifice of the neck.

Fig. 10 is a cross-sectional view of the closure mounted on the neck of a container and showing the cap of the closure in an intermediate position between the release position and the inclined open position.

Fig. 11 is a perspective view of the closure mounted on the neck of a container and showing the cap of the closure in a tilted open position.

Detailed Description

In the description and in the drawings, the axis X corresponds to the axis of rotation of the cap 1 of the closure device when the closure device is screwed onto the neck 2 of the container. By convention, the "radial" orientation is oriented orthogonal to axis X and the axial orientation is oriented parallel to axis X. The terms "outer" and "inner" are used to define the relative position of one element with respect to another, with reference to the X axis, an element close to the axis X being therefore classified as an inner element as opposed to an outer element located radially on the periphery.

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

Referring to fig. 1 to 10, the following components are described below: the assembly comprises a closure means, particularly shown in fig. 1, and a container equipped with a neck 2, particularly shown in fig. 2.

As shown in fig. 2, the neck 2 of the container has an upper end on which is formed an aperture 3, which aperture 3 allows the contents of the container to be poured out. The neck 2 of the container comprises a support collar 4 and an engagement collar 5, the support collar 4 projecting radially outwards, the engagement collar 5 also projecting radially outwards and being arranged axially between the support collar 4 and the orifice 3. A cylindrical portion is formed axially between the support collar 4 and the bore 3. On the other hand, the neck 2 comprises a helical thread 6 axially positioned between the engagement collar 5 and the orifice 3, this helical thread 6 being formed by a series of helical ribs radially projecting from the outer surface of the neck 2 towards the outside. The helical thread 6 is intended to cooperate with a complementary helical thread 7 formed by a series of helical ribs formed on the cap 1 of the closure device.

According to one embodiment, the helical thread 6 formed on the neck 2, and the helical thread 7 formed on the cap 1 are interrupted. In other words, adjacent helical ribs are separated by the following spacing: this spacing forms a vent when the cap 1 is still attached to the neck 2 and in particular allows evacuation of the air present inside the container.

The capping device comprises: a lower ring 9, the lower ring 9 being retained in the neck 2 of the container; a lid 1, the lid 1 being intended to cover an aperture 3 of a container in order to seal the aperture 3; a hinge 10, which hinge 10 connects the lid 1 with the lower ring 9; and locking means positioned to lock the lid 1 in the tilted open position shown in figures 4, 9 and 11. In the tilted open position, the lid 1 is disengaged from the aperture 3 of the container and does not interfere with the pouring of the contents of the container.

As illustrated in fig. 7 and 8, the articulation device 10 extends over an angular range S1, this angular range S1 being divided into two equal parts by a vertical bisecting plane Pb.

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

The outer peripheral skirt 14 has a helical thread 7 on its inner face, the helical thread 7 being formed by a series of helical ribs extending in the first rotational direction about the axis X, visible in fig. 2 and 5 to 7. The helical thread 7 is intended to cooperate with a helical thread 6 formed on the outer surface of the neck 2. In this way, the cap 1 can be screwed into the neck 2 in order to close the container and unscrewed from the neck 2 in order to open the container. The lid 1 is thus movable between a closed position and a release position shown in fig. 3. In the release position, the cap 1 is no longer engaged with the neck 2. The cap 1 can therefore be tilted towards the tilted open position shown in figures 4, 9 and 11, in which the cap 1 is moved away from the aperture 3 of the neck 2 so as not to interfere with the pouring out of the contents of the container.

As shown in particular in fig. 9, the cap 1 also comprises an inner skirt 8, which inner skirt 8 extends vertically downwards from the upper wall 13 of the cap 1 and is dimensioned to be inserted into the orifice 3 of the neck 2. The lid 1 further comprises an annular lip 15, which annular lip 15 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 so that, when the cap 1 is in the closed position in the neck 2 of the container, the inner skirt 8 is in contact against the inner face of the neck 2 while the annular lip 15 is in contact against the outer face of the neck 2. In this way, the inner skirt 8 and the annular lip 15 make it possible to ensure the seal of the closure.

Advantageously, before the first opening of the container, the lower ring 9 is connected to the lid 1 by some frangible bridges, not visible in the figures, which are intended to break during the opening of the lid 1. These frangible bridges thus constitute a tamper-proof seal.

The lower ring 9 is axially retained on the neck 2 of the container while the lower ring 9 can rotate about the axis X relative to the neck 2. As shown in fig. 3, the lower ring 9 comprises two parts, a first section 16 and a second section 17, hinged to each other, whereby the lower ring 9 is connected to the lid 1 by means of the hinge means 10.

According to one embodiment, the lower ring 9 comprises two narrow regions, i.e. the radial thickness of the two narrow regions is smaller than the radial thickness of the lower ring 9 outside said narrow regions. The two narrow regions delimit a first section 16 and a second section 17. The narrow region thus forms a pivot allowing the second section 17 to hinge with respect to the first section 16.

According to another embodiment, the lower ring 9 has no narrow area delimiting the first section 16 and the second section 17.

The second section 17 is rotatable upwards relative to the first section 16 between a lowered position, in which the second section 17 is intended to be arranged below the engaging collar 5, and a raised position, in which the second section 17 is arranged at least partly above the engaging collar 5. This allows the cap 1 to move upwardly relative to the neck 2 of the container until the helical thread 7 of the cap 1 disengages from the helical thread 6 formed on the neck 2 of the container. In other words, when unscrewing cap 1, lower ring 9 is driven in a rotatable manner about axis X, while second section 17 of lower ring 9 rotates with respect to first section 16 to the raised position, to allow axial movement of cap 1 from the closed position up to the release position represented in fig. 3. When the lid 1 is rotated from the release position to the tilted open position, the second section 17 of the lower ring 9 is rotated in the opposite direction with respect to the first section 16 and then returned to the lowered position. On the other hand, as described in more detail below, the second section 17 also rotates from the lowered position to the raised position with respect to the first section 16 when the lid 1 rotates from the tilted open position to the release position.

The lower ring 9 is axially retained on the neck 2 of the container by means of an engagement collar 5, visible in particular in fig. 5 to 7. The engagement collar 5 presents a frustoconical outer surface tapering upwards, i.e. in the direction of the orifice 3 of the container. The engagement collar 5 defines a projection downwards, i.e. in the opposite direction to the aperture 3. The first section 16 of the lower ring 9 comprises engagement elements 18, said engagement elements 18 cooperating with an engagement collar 5 formed on the container in order to axially retain the lower ring 9 to the neck 2 of the container. The engagement elements 18 are projections which project radially inwards from the first section 16 of the lower ring 9, these projections being shown in detail in particular in fig. 5 and 6. The retaining elements 18 have a radial dimension which increases from bottom to top, that is to say in the direction of the upper edge of the lower ring 9. During assembly of the closure on the neck 2 of the container, the engagement element 18 slides against the frustoconical surface of the engagement collar 5 and then locks behind the engagement collar 5 by elastic return.

As shown in fig. 5 and 6, the first section 16 of the lower ring 9 comprises a front region 19 and two joining

regions

20, 21, the front region 19 being diametrically opposite the second section 17 of the lower ring 9, the two joining

regions

20, 21 being arranged on each side of the front region 19 and each being arranged between the front region 19 and the second section 17 of the lower ring 9. The joining elements 18 are arranged only in the two joining

regions

20, 21. Since there are no engagement elements 18 in the front region of the first section 16, there is a radial space between the lower ring 9 and the neck 2 which allows the lower ring 9 to move from front to rear and vice versa. The radial clearance between the lower ring 9 and the neck 2 is for example between 0.5mm and 1mm in the anterior/posterior direction. This facilitates the passage of a portion of the second section 17 by engaging either side of the collar 5 during movement of the second section 17 between the lowered and raised positions. In other words, the following tensions are small: the tension will be applied on the lower ring 9 to allow the second section 17 to pass each side of the engagement collar 5.

Advantageously, the second section 17 extends over an angular range of between 90 ° and 150 °, and for example about 120 °, the front region of the second section 16 extends over an angular range of between 90 ° and 150 °, for example about 120 °, while each of the two joining

regions

20, 21 extends over an angular range comprised between 30 ° and 90 °, for example about 60 °.

On the other hand, the bisecting plane Pb cuts the second section 17 and the front portion of the second section 17 into two equal portions. The angular ranges corresponding to the two joining

zones

20, 21 are therefore symmetrical to one another about the bisecting plane Pb.

The hinge arrangement 10 is configured to allow the lid 1 to be rotated between a release position shown in fig. 3, in which the peripheral skirt 14 extends downwardly from the upper wall 13 of the lid 1, and a tilted open position represented in fig. 4, 9 and 11, in which the peripheral skirt 14 extends upwardly from the upper wall 13 of the lid 1. In the embodiment shown, the hinging means 10 comprise two

foils

11, 12, visible in particular in fig. 4, the two foils 11, 12 joining the cap 1, and more particularly the outer peripheral skirt 14 of the cap 1, with the lower ring 9, and more particularly with the second section 17 of the lower ring 9. The two foils 11, 12 are symmetrical about the bisecting plane Pb.

The locking means comprise a heel 22, visible in particular in fig. 1, which heel 22 is formed on the outer peripheral skirt 14 of the lid 1. The heel 22 is arranged between the two foils 11, 12. Advantageously, the lower end of the heel 22 is located at the same height as the lower end of the outer peripheral skirt 14. Heel 22 includes a stop 23, which stop 23 extends circumferentially about axis X and projects radially outward from heel 22.

During the movement of the cover 1 from the release position towards the tilted open position, the stop 23 abuts against the upper end of the second section 17 of the lower ring 9, which tends to return said second section 17 towards the lowered position.

On the other hand, during the movement of the cover 1 from the inclined open position towards the release position, firstly, as shown in fig. 10, the stop 23 rests against the engagement collar 5 to exert a tension on the second section 17 of the lower ring 9 having a radially outward directed component and an axially upward directed component. This allows the lower ring 9 to move from front to rear to press the front region 19 of the first section 16 of the lower ring 9 against the neck 2 of the container, so as to facilitate movement of the second section 17 towards the raised position. This also allows to facilitate the movement of the second section 17 between the lowered position and the raised position.

Then, as shown in fig. 10, during the movement of the cap 1 from the inclined open position to the release position, the outer surface of the heel 22 abuts at a second moment on the upper surface of the helical rib of the helical thread 6 formed in the neck 2 of the container, which also allows to exert on the second section 17 a tension force having a radially outwardly directed component and an upwardly directed component to move the second section 17 towards the raised position.

On the other hand, as shown in fig. 11, the lower end 24 of the helical thread 7 formed on the inner face of the outer peripheral skirt 14, i.e. the start of the helical thread 7, is arranged in an angular range S2 defined between the bisecting plane Pb and a radial plane Pr located at 160 ° from the bisecting plane Pb according to a second direction opposite to the first direction of rotation, i.e. the direction in which the helical thread 7 rotates about the axis X. Thus, the lower front portion 25 of the outer peripheral skirt 14 is free of the helical thread 7, which makes it easier to fit the cap 1 on the neck 2 of the container. This arrangement is particularly advantageous when the cap 1 can assume a slightly rearward position with the cap 1 in contact with the neck 2 of the container. This is particularly true in the following cases: when the front region 19 of the first section 16 is free of the engagement elements 18 and therefore the lower ring 9 can move radially from front to rear with respect to the neck 2 of the container.

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

On the other hand, as schematically represented in fig. 8, 9 and 10, at least one of the ribs of the series of ribs of the helical thread 7 is formed on the inner face of the heel 22. In other words, at least one of the ribs of the helical thread 7 is formed between the two foils 11, 12 of the hinge 10. The presence of said ribs formed on the heel 22 makes it possible to increase the resistance to the pressure of the screw-like thread 7 and therefore to prevent the lid 1 from opening unintentionally due to excessive pressure on the container, in particular when the container is intended to contain carbonated beverages.

The kinematics of the cap 1 are as follows. During the first unscrewing, the lid 1 moves away from the closed position and away from the lower ring 9 to the release position illustrated in fig. 3. The frangible bridges break during this movement. Furthermore, during this unscrewing movement of the cap 1, the lower ring 9 is rotatably driven about the axis X and the second section 17 of the lower ring 9 rotates towards the raised position when the cap 1 is moved away from the engagement collar 5.

The lid 1 can then be rotated backwards in the direction of an open inclined position in which the peripheral skirt 14 extends upwards from the top wall 13. During the movement of the lid 1 backwards in the direction of the open inclined position of the lid 1, the stop 23 abuts against the upper end of the second section 17 of the lower ring 9, so that the second section 17 of the lower ring 9 rotates from the raised position to the lowered position.

As shown in fig. 9, when the second section 17 of the lower ring 9 is in the lowered position and the lid 1 is in the tilted open position of the lid 1, the stop 23 is supported against the engagement collar 5. In this way, the cap 1 is kept in the tilted open position of the cap 1 due to this abutment of the stop 23 against the engagement collar 5, the cap 1 cannot be rotated towards the release position in which the cap 1 faces the dispensing orifice 3, while the second section 17 of the lower ring 9 is kept in the lowered position. This makes it possible to increase the minimum opening angle of the cover 1. Advantageously, therefore, when the lid 1 is in the tilted open position of the lid 1 and the second section 17 of the lower ring 9 is in the lowered position, the opening angle of the lid 1 is greater than 120 °, and advantageously greater than or equal to 145 °, and for example about 180 °. The opening angle corresponds to the following convex angular section: the convex angular section is formed at the intersection between a plane parallel to the upper wall 13 of the cover 1 and a horizontal plane.

To close the lid 1 again, the user tilts the lid 1 forward to the release position. During this inclination, the stop 23 rests against the engaging collar 5 to exert on the second section 17 of the lower ring 9 a tension force having a radially outward directed component that makes it possible to move the lower ring 9 from the front to the rear and an axially upward directed component that allows to facilitate the movement of the second section 17 of the lower ring 9 towards the raised position. The outer surface of the heel 22 also abuts against the helical rib of the helical thread 6, which also facilitates movement of the second section 17 of the lower ring 9 towards the raised position.

When the second section 17 is in the raised position and the cap 1 is in the release position, the cap 1 may then be screwed back into the neck 2 of the container. During screwing, the lower ring 9 is rotatably driven about the axis X and the second section 17 of the lower ring 9 rotates towards the lowered position as the cap 1 approaches the engagement collar 5.

Advantageously, the entire closure is moulded in a single piece of synthetic material, such as polyethylene and advantageously high density polyethylene. Advantageously, the closure means is moulded in the configuration of fig. 1, i.e. in the closed position in which it can be mounted directly on the neck 2 of the container.

Although the invention has been described in relation to various embodiments, it is obvious that the invention is not in any way restricted to them, and that it comprises all the technical equivalents of the means described and their combinations, insofar as they fall within the framework of the invention as defined by the claims.

Use of the verbs "consisting of … …," comprising "or" including, "and their conjugates, does not exclude the presence of other elements or stages than those identified in the claims.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims

1. A closure intended to be fixed on a neck (2) of a container, said neck (2) comprising an orifice (3) and an engagement collar (5), said closure comprising:

-a cap (1), said cap (1) comprising an upper wall (13) and an outer peripheral skirt (14), said outer peripheral skirt (14) having a helical thread (7), said helical thread (7) being intended to cooperate with a helical thread (6) formed on said neck (2) to allow:

unscrewing of the cap (1) about an axis X to move the cap (1) from a closed position, in which the upper wall (13) closes the aperture (3) of the neck (2) and the outer peripheral skirt (14) surrounds the neck (2), towards a release position, in which the cap (1) is no longer engaged with the neck (2); and

screwing of the cap (1) into the neck (2) to move the cap (1) from the release position to the closed position;

-a lower ring (9), said lower ring (9) being axially fixed to said neck (2) and being rotatably movable on said neck (2) about said axis X, said lower ring (9) comprising a first section (16) and a second section (17), said first section (16) comprising an engagement element (18), said engagement element (18) projecting radially into said lower ring (9) and being intended to be arranged below said engagement collar (5) to axially retain said lower ring (9) at said neck (2) of said container, said first section (16) and said second section (17) of said lower ring (9) being hinged to each other such that said second section (17) is intended to be rotated with respect to said first section (16) between a lowered position, in which said second section (17) is intended to be arranged below said engagement collar (5), and a raised position, in which said second section (17) is arranged at least partially above said engagement collar (5);

-a hinge device (10), said hinge device (10) attaching said lid (1) to said second section (17) of said lower ring (9) and being configured to allow said lid (1) to rotate between said release position and an open inclined position in which said lid (1) is released from said aperture (3) of said neck (2);

-the lower ring (9) is configured so that the second section (17) rotates from the lowered position to the raised position with respect to the first section (16) during the movement of the lid (1) from the closed position to the release position, and so that the second section (17) rotates from the raised position to the lowered position with respect to the first section (16) during the movement of the lid (1) from the release position to the inclined open position;

-the first section (16) of the lower ring (9) comprises a front region (19) and two joining regions (20, 21), the front region (19) being diametrically opposite the second section (17), the two joining regions (20, 21) each being arranged between the front region (19) of the first section (16) and the second section (17), the joining elements (18) being arranged only in the two joining regions (20, 21) to allow a radial movement of the lower ring (9) capable of facilitating the passage of a portion of the second section (17) through each side of the joining collar (5) during the movement of the second section (17) between the lowered position and the release position.

2. A closure arrangement according to claim 1, wherein the engagement elements (18) are radially inwardly projecting tabs.

3. A capping device according to claim 1 or 2, wherein the second section (17) extends over an angular range between 90 ° and 150 °.

4. A capping device according to any one of claims 1 to 3, wherein the front region (19) of the first section (16) extends over an angular range comprised between 90 ° and 150 °.

5. A capping device according to any one of claims 1 to 4, wherein each of the two engagement regions (20, 21) extends over an angular range comprised between 30 ° and 90 °.

6. A capping device according to any one of claims 1 to 5, wherein the hinge means (10) extend over a first angular range cut into two equal portions by a bisecting plane Pb, the two joining regions (20, 21) extending in angular segments symmetrical to each other about the bisecting plane Pb.

7. Cap means according to any one of claims 1 to 6, wherein said hinge means (10) extends over a first angular range cut into two equal parts by a bisecting plane Pb, and wherein said helical thread (7) formed on said outer peripheral skirt (14) of said cap (1) extends in a first direction around said axis X and has a lower end and an upper end, said lower end of said helical thread (7) being arranged in a second angular range defined between said bisecting plane Pb and a radial plane positioned at 160 ° from said bisecting plane Pb according to a second direction opposite to said first direction.

8. The capping device according to claim 7, wherein the lower end of the helical thread (7) is arranged in an angular range defined between two radial planes positioned at 90 ° and 160 ° from the bisecting plane Pb, respectively, according to the second direction for rotation.

9. An assembly comprising a container equipped with a neck (2) and a closure device according to any one of claims 1 to 8, the neck (2) comprising a dispensing orifice (3), an engagement collar (5) and a helical thread (6), the lower ring (9) being axially fixed to the neck (2) and rotatably movable on the neck (2) about the axis X.

10. The assembly according to claim 9, wherein the capping device further comprises a locking device configured to lock the cap (1) in the tilted open position, the locking device comprising a stop (23), the stop (23) projecting radially outwards from the cap (1) and being configured to rest against the engagement collar (5) of the neck (2) during movement of the cap (1) from the tilted open position towards the release position, so as to exert a tension on the second section (17) having a radially outwards directed component and an axially upwards directed component, so as to facilitate movement of the second section (17) between the lowered position and the raised position.

11. Assembly according to claim 10, wherein the stop (23) is configured such that, during the movement of the cover (1) from the release position towards the tilted open position, the stop (23) rests against an upper end of the second section (17) of the lower ring (9) to move the second section (17) from the raised position to the lowered position.

12. Assembly according to claim 10 or 11, wherein said locking means further comprise a heel (22) formed on said peripheral skirt (14) of said cap (1) and extending axially, said heel (22) being configured such that said heel (22) rests against a helical rib of said helical thread (6) formed on said neck (2) of said container during movement of said cap (1) from said inclined open position towards said release position, so as to exert on said second section (17) a tension force having a radially outwardly directed component and an axially upwardly directed component so as to facilitate movement of said second section (17) from said lowered position to said raised position.

13. Assembly according to claim 12, wherein the hinge device (10) comprises two foils (11, 12), and wherein the heel (22) is formed between the two foils (11, 12).

14. Assembly according to claim 12 or 13, wherein the stop (23) projects radially outwards from the heel (22).