RU2809857C1 - Assembly including container and clocking device attached to container - Google Patents

Abstract

FIELD: caps.

SUBSTANCE: invention relates to a unit for closing the opening of a container. The unit for closing the opening of the container consists of a container neck equipped with a crimp collar, and a closure device, which contains a lower ring (9), a cap (1); a hinge device (10) that connects the cap (1) to the lower ring (9); and a locking device configured to fix the cap (1) in an inclined open position. The locking device consists of a strip (23) and a protruding part (24) protruding axially from the lower ring (9); the strip (23) and the protruding part (24) are designed in such a way that when the cap (1) is in an inclined open position, the protruding part (24) is held between the strip (23) and the locking crimp collar.

EFFECT: providing the ability to securely fix the cap in an inclined open position, in which it does not interfere with the flow of the contents of the container.

10 cl, 9 dwg

Description

Field of technology

The invention relates to an assembly comprising a container and a closure device which is provided with a cap and allows said cap to be kept attached to the neck of the container, thereby preventing the cap from being completely lost.

State of the art

Closure devices are known in the art that allow the cap to remain attached to the neck of a container. Such a closure device is described, for example, in document EP1406820 or US2018086510.

The closure device consists of a bottom ring that is designed to be held on the neck of the container, a cap that is designed to close the opening of the container to seal it, two elastic plates that connect the cap to the bottom ring, and a locking device configured to lock the cap in an inclined open position. position

This closure device is not entirely satisfactory. In particular, this cap is intended to be attached to the neck of a given container and cannot be adapted to other types of neck. Additionally, moving the cap between a closed position and an inclined open position is a simple turning motion, which limits the height of the cap and/or neck that can be used. This limits the applications of said closure device. In particular, it is not suitable for containers intended to receive carbonated drinks, since the pressure prevailing inside containers of this type will cause the cap to open undesirably.

In addition, the locking device is not suitable for all types of caps and does not provide sufficiently reliable support for an inclined open position, for example on screw caps.

Disclosure of the invention

The idea based on the invention is to provide an assembly comprising a container and a closure device provided with a cap attached to the neck of the container and configured to screw onto the neck of the container, which:

- allows you to securely fix the cap in an inclined open position, in which it does not interfere with the flow of the contents of the container; And

- which is easy to manufacture.

In accordance with one embodiment, the present invention provides a kit that contains:

- a container equipped with a neck, the neck comprising a dispensing hole, a screw thread twisting around an X axis provided on the neck, and a crimp collar,

- a closure device containing:

- a lower ring axially attached to the neck and configured to move when rotating on the neck about said axis X, said lower ring comprising a first section consisting of engaging elements that project radially inward from the lower ring and are located below the crimp collar for holding the lower ring axially on the neck of the container, and a second section, wherein the first section and the second section of the lower ring are mutually hinged such that the second section rotates relative to the first section between a lowered position in which the second section is located below the crimp collar and an raised position a position in which the second section is located at least partially above the crimp collar,

- a cap comprising a top wall and an outer peripheral skirt, wherein the outer peripheral skirt has a screw thread configured to engage a neck screw thread to allow movement of the cap between a closed position and a released position in which the screw thread of the cap no longer engages the screw thread neck thread;

• a hinge device consisting of two plates connecting the outer peripheral skirt and the second section and configured to allow the cap to rotate between a released position and an inclined open position in which the cap is released from the neck opening; wherein the second section of the lower ring is configured to be positioned in a lowered position when the cap is in an inclined open position;

The closure device also includes a locking device configured to lock the cap when it is in an inclined open position, the locking device comprising:

• a heel projecting axially from the outer peripheral skirt between two plates of the hinge device and consisting of a strip projecting radially outward; And

• a projecting portion that projects axially from the second section of the lower ring between the two plates of the hinge device;

• wherein the strip and the protruding part are designed in such a way that when the cap is in the inclined open position and the second section of the lower ring is in the lowered position, the protruding part is clamped between the strip and the crimp collar.

Thanks to this arrangement, the locking device guarantees reliable fixation of the cap in an inclined open position at a large angle. Moreover, with regard to the locking device, which would consist of a strip that would be configured to fit against the neck of the container, the proposed arrangement makes it possible to limit the radial size of the strip. This is particularly advantageous since a strip having a radial dimension that is too large is likely to impair the reliability and productivity of filling operations during which capping devices are transported, particularly on conveyors, before being actuated on containers.

In accordance with other preferred embodiments, such an assembly may have one or more of the following features.

According to one embodiment, the strip and projection are configured such that when the cap is in the inclined open position and the second section of the lower ring is in the lowered position, the strip and projection contact each other in a region in the plane of the crimp collar.

According to an embodiment, e1 > L - e2, where:

L is the length of the plates in the original state, in which the cap is in the closed position;

e1 is the radial distance between the contact area of the strip designed to come into contact with the protruding portion when the cap is in the inclined open position, and the intersection between a straight line passing through the upper ends of the plates and the plane of symmetry of the plates relative to each other; And

e2 is the radial distance between the contact area of the protruding part intended to come into contact with the strip when the cap is in the inclined open position, and the intersection between a straight line passing through the lower ends of the plates and the plane of symmetry P.

According to an embodiment, e1 > L - e2 + e3 + e4, where:

e3 is the radial gap between the lower ring and the neck in the radial direction to the X axis and inscribed in the symmetry plane P; And

e4 - radial clearance between the protruding part and the crimp collar.

According to an embodiment, e1 = L - e2 + e3 + e4 + Δ, where Δ is from 0.05 to 2 mm.

According to an embodiment, the protruding portion extends beyond the lower edge of the outer peripheral skirt.

In accordance with an embodiment, the first section of the lower ring includes a front region that is diametrically opposed to the second section and two engaging regions, each of which is located between the front region of the first section and the second section, wherein the engaging elements are located only in these two regions to allow the lower ring to move radially, which may facilitate passage of a portion of the second section on each side of the crimp collar as the second section moves between the lowered position and the released position. Thus, the tensile forces that will be applied to the lower ring to allow the second section to move between the lowered position and the raised position will be less, making the closure easier to use.

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

According to an embodiment, there are no engaging elements in the front region of the first section.

According to an embodiment, the engaging elements are projections projecting inwardly in a radial direction.

According to an embodiment, the second section occupies an angular range of 90 to 180°.

According to an embodiment, the front region of the second section occupies an angular range of 40 to 150°.

According to an embodiment, each of the two engaging regions occupies an angular range of 10° to 90°.

According to an embodiment, the first section and the second section are separated from each other by two thinned areas in which the lower ring locally represents a reduction in radial thickness to provide a hinge connection of the second section to the first section.

According to another embodiment, the bottom ring is thin enough to allow the second section to pivot relative to the first section without the first section and the second section being separated from each other by the two thinned areas.

According to an embodiment, the outer peripheral skirt includes a cut-out portion, and elastic plates are attached to said outer peripheral skirt at the cut-out portion. This configuration allows for sufficient length of elastic plates while limiting the size of the gaps created between the cap and the bottom ring, which are likely to allow dust to enter.

According to an embodiment, the lower ring is connected to the outer peripheral skirt by frangible bridges.

According to an embodiment, the closure device is molded in one piece.

According to an embodiment, the plates and the locking device are designed in such a way that during the rotational movement of the cap between the released position and the inclined open position, the elastic plates are subjected to a tensile force, which increases up to an intermediate unstable position, and which then decreases from said intermediate position to inclined open position.

According to an embodiment, when the cap is in its inclined open position and the second section of the lower ring is in the lowered position, the opening angle of the cap is greater than 120° and preferably greater than or equal to 145°, and for example is on the order of 180°.

Brief description of the figures

The invention will be better understood and other objects, details, features and advantages thereof will become more apparent through the following description of various specific embodiments of the invention, presented solely by way of illustration and not limitation with reference to the accompanying drawings.

In FIG. 1 is a rear three-quarter perspective view of a closure mounted on the neck of a container.

In FIG. 2 is a sectional view of the neck of a container for receiving the closure shown in FIG. 1.

In FIG. 3 is a side view of a closure mounted on the neck of a container and shows the cap of the closure in a released position where it no longer engages the neck of the container.

In FIG. 4 is a detailed view of the engaging members projecting radially inward from the bottom ring of the closure.

In FIG. 5 is a perspective view of a closure mounted on the neck of a container and shows the cap of the closure in an inclined open position in which the cap is released from the opening in the neck.

In FIG. 6 is a cross-sectional view of a closure mounted on the neck of a container and shows the cap of the closure in an inclined open position in which the cap is released from the neck.

In FIG. 7 is an enlarged view of FIG. 1, illustrating the locking device in detail.

In FIG. 8 shows a schematic cross-section of the cap and strip.

In FIG. 9 is a schematic cross-sectional view of the lower ring and the protruding portion.

Carrying out the invention

In the description and in the figures, the X axis corresponds to the axis of rotation of the cap 1 of the closure device when it is screwed onto the neck 2 of the container. By definition, the "radial" orientation is directed orthogonal 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 one element relative to another, for example, relative to the X-axis, the element closest to the X-axis is thus classified as internal as opposed to the external element located radially on the periphery.

The terms "upper" and "lower" are used to define the relative position of one element relative to another, and assuming the position in which the opening 3 of the neck 2 is oriented upward and the cap 1 in the closed position on the neck 2 of the container, the element intended to be placed below , is designated as the bottom, and the element intended to be placed above is designated as the top. The terms "front" and "back" are used to define the relative position of one element relative to another along a diameter perpendicular to the X-axis.

As shown in FIG. 1-6, the assembly described below includes a closure device, shown in particular in FIG. 1, and a container provided with a neck 2, shown in particular in FIG. 2.

As shown in FIG. 2, the neck 2 of the container has an upper end in which a hole 3 is made, allowing the contents of the container to be poured out. The container neck 2 includes a support collar 4, which projects outward in the radial direction, and a crimp collar 5, which also projects outward in the radial direction, and which is located axially between the support collar 4 and the hole 3. On the other hand, the neck 2 contains axially located between the crimp collar 5 and the hole 3, a screw thread 6 formed by a series of screw ribs projecting radially outward from the outer surface of the neck 2. The screw thread 6 is designed to interact with a complementary screw thread 7, shown in particular in FIG. 5, which is formed by a number of screw ribs made on the cap 1 of the closure device.

According to an embodiment, the screw thread 6 on the neck 2 as well as the screw thread 7 on the cap 1 are discontinuous. In other words, adjacent helical fins are separated by a gap which forms a vent and allows, in particular, the removal of gas contained within the container while the cap 1 is still attached to the neck 2.

The closure device includes a lower ring 9, which is held on the neck 2 of the container, a cap 1, which is designed to close the opening 3 of the container to seal it, and a hinge device 10, which connects the cap 1 to the lower ring 9. The cap 1 is configured to move between closed position shown in Fig. 1, and the released position shown in FIG. 3, in which the cap 1 is no longer engaged with the neck 2. The cap 1 is also tiltable from the released position to the tilted open position shown in FIG. 5 and 6, in which the cap 1 is disconnected from the hole 3 of the neck 2 so as not to interfere with the pouring of the contents from the container. The closing device also contains a locking device configured to fix the cap 1 in an inclined open position.

In particular, as shown in FIG. 1, the cap 1 includes a top wall 13 designed to be positioned substantially orthogonal to the X-axis and facing the opening 3 of the neck 2 when said cap 1 is in a closed position. The cap 1 further includes an outer peripheral skirt 14 designed to surround the container neck 2 when the cap 1 is in the closed position. An outer peripheral skirt 14 extends downwardly perpendicular to the upper wall 13 from the outer perimeter of said upper wall 13. A screw thread 7 is provided on the inner surface of the outer peripheral skirt 14.

In particular, as shown in FIG. 5 and 6, the cap 1 also includes an inner skirt 8 that extends perpendicularly downward from the top wall 13 of the cap 1 and is sized to be inserted inside the opening 3 of the neck 2. The cap 1 also includes an annular projection 15 that extends radially from the top wall 13 between the inner skirt 8 and the outer peripheral skirt 14. The inner skirt 8 and the annular protrusion 15 are sized such that when the cap 1 is in the closed position, in the container neck 2, the inner skirt 8 is in contact with the inner surface of the neck 2, while the annular protrusion 15 is in contact with the outer surface of the neck 2. Thus, the inner skirt 8 and the annular protrusion 15 make it possible to guarantee the tightness of the closure.

The advantage is that, before the container is first opened, the lower ring 9 is connected to the cap 1 by frangible links, not shown in the figures, designed to be torn when the cap 1 is opened. Thus, these frangible links constitute tamper-evident seals.

The lower ring 9 is held axially on the container neck 2 as long as it can be rotated relative to it around the X axis. As shown in FIG. 1, 3 and 4, the lower ring 9 contains two parts that are hingedly connected, in other words, a first section 16 and a second section 17, by means of which the lower ring 9 is connected to the cap 1 by means of a hinge device 10.

According to an embodiment, the lower ring 9 comprises two tapered regions, that is to say, the radial thickness of which is less than the radial thickness of the lower ring 9 outside said tapered regions. Two tapered regions demarcate the first section 16 and the second section 17. Thus, the tapered regions form pivot points that allow the second section 17 to pivot relative to the first section 16. According to another embodiment, the lower ring 9 does not have tapered regions that demarcate the first section. and second sections 16, 17.

As shown in FIG. 3, the second section 17 is configured to pivot upward relative to the first section 16 between a lowered position in which the second section 17 is designed to be positioned below the crimp collar 5 and a raised position in which the second section 17 is located at least partially above the crimp collar 5. This allows the cap 1 to move upward relative to the container neck 2 until the screw thread 7 of the cap 1 disengages from the screw thread 6 formed on the container neck 2. In other words, when the cap 1 is unscrewed, the lower ring 9 is driven to rotate about the X-axis while the second section 17 of the lower ring 9 is rotated relative to the first section 16 up to the raised position to cause the cap 1 to move upward axially from the closed position to the released position , presented in Fig. 3. When the cap 1 rotates from the released position to the inclined open position, the second section 17 of the lower ring 9 rotates in the opposite direction to the first section 16 and then returns to the lowered position. On the other hand, as described in more detail below, the second section 17 also rotates relative to the first section 16 from a lowered position to an elevated position when the cap 1 rotates from an inclined open position to a released position.

The lower ring 9 is held axially on the container neck 2 by a crimp collar 5. As shown in FIG. 2, the crimp collar 5 has an outer surface in the shape of a truncated cone, which tapers upward, i.e. towards the opening 3 of the container. The crimp collar 5 limits the protrusion downwards, i.e. in the direction opposite to the hole 3.

As shown in FIG. 4, the first section 16 of the lower ring 9 includes engaging members 18 that engage with a crimp collar 5 formed on the container to axially retain the lower ring 9 on the neck 2 of the container. The engaging members 18 are projections that project radially inward from the first section 16 of the lower ring 9. The engaging members 18 have a radial dimension that increases from bottom to top, i.e., toward the top edge of the lower ring 9. During assembly of the closure device on the neck 2 of the container, the engaging elements 18 slide relative to the truncated cone-shaped surface of the crimp collar 5 and are then fixed by spring return behind the crimp collar 5.

The first section 16 of the lower ring 9 consists of a front region 19, which is diametrically opposed to the second section 17 of the lower ring 9, and two engaging regions 20, one of which is shown in FIG. 4, wherein they are located on each side of the front region 19, and each of them is located between the front region 19 and the second sections 17 of the ring 9. According to an embodiment, the engaging elements 18 are located in only two engaging regions 20, 21. Thus, due to the absence of engaging elements 18 in the front region of the first section 16, there is a radial play (hereinafter referred to as e4) between the lower ring 9 and the neck 2, which allows the lower ring 9 to move from front to back and vice versa. The radial clearance e4 between the lower ring 9 and the neck 2, depending on the forward/backward direction, is, for example, from 0.5 to 1 mm. This facilitates the passage of a portion of the second section 17 on each side of the crimp collar 5 as the second section 17 moves between the lowered position and the raised position. In other words, the tensile forces that will be applied to the lower ring 9 to force the passage of the second section 17 on each side of the crimp collar 5 will be less.

In the illustrated embodiment, the hinge device 10 comprises two plates 11, 12, shown in particular in FIG. 4, which connect the cap 1 and, in particular, the outer peripheral skirt 14 of the cap 1, with the lower ring 9, and, in particular, with the second section 17 of the lower ring 9. The plates 11, 12 are symmetrical to each other relative to the plane of symmetry P, shown in Fig. 8 and 9, which is vertical and passes through the X axis.

Returning to Fig. 1, it can be seen that the plates 11, 12 are attached to the outer peripheral skirt 14 in a serrated portion. Likewise, the plates 11, 12 are preferably attached to the second section 17 of the lower ring 9 in a serrated portion. In other words, the plates 11, 12 extend substantially above the lower boundary of the outer peripheral skirt 14 and extend substantially below the upper boundary of the lower ring 9.

The locking device includes a heel 22, in particular shown in FIG. 1, 5 and 6, which is formed on the outer peripheral skirt 14 of the cap 1. The heel 22 projects downward in the axial direction, i.e. towards the lower ring 9, from the outer peripheral skirt 14 of the cap 1. The heel 22 projects between the two plates 11, 12. The heel 22 consists of a strip 23 which extends circumferentially between the two plates 11, 12 and which projects radially outward from the heel 22.

The locking device consists of a protruding part 24 which projects axially upward, i.e. towards the outer peripheral skirt 14 of the cap 1, from the second section 17 of the lower ring 9. The protruding part 24 also projects between the two plates 11, 12.

As shown in FIG. 5 and 6, the strip 23 and the protruding portion 24 are configured such that when the cap 1 is in the slanted open position, the protruding portion 24 is inserted between the strip 23 and the crimp collar 5. In other words, when the cap is in the slanted open state, the strip 23 and the protruding part 24 are in contact with each other in the area located in the plane of the crimp collar 5, and the protruding part 24 is also in contact with the crimp collar 5.

As shown respectively in FIG. 8 and 9, the contact area of the strip 23 with the protruding part 24 is at a radial distance e1 from the intersection between the straight line that passes through the upper ends of the plates 11, 12 and the symmetry plane P, and the contact area of the protruding part 24 with the strip 23 is at the radial distance e2 from the intersection between the straight line passing through the lower ends of the plates 11, 12 and the symmetry plane P.

The size of e1 is such that e1 > L - e2, where L is the length of the plates 11, 12 in the original state, when the cap is in the closed position. This ensures that the strip 23 comes into contact with the protruding portion 24 and that the plates 11, 12 are stretched when the cap 1 is in the inclined open position.

In addition, e1 > L - e2 + e3 + e4, where e3 is the radial clearance between the protruding part 24 and the crimp collar 5, and e4 is the radial clearance between the lower ring 9 and the neck 2 in accordance with the forward/backward direction, i.e. in accordance with the direction radially to the X axis and inscribed in the symmetry plane P. Preferably e1 = L - e2 + e3 + e4 + Δ, where Δ is from 0.05 to 2 mm and is defined in such a way that the protruding part 24 is in contact with crimp collar 5 when cap 1 is in an inclined open position.

On the other hand, as shown in FIG. 7, when the cap 1 is in the inclined open position, the upper edge of the contact surface of the strip 23 extends axially below the upper end of the plates 11, 12 at a distance d1, the upper end of the protruding part 24 extends axially above the lower end of the plates 11, 12 at a distance d2 , and the upper edge of the crimp collar 5 extends axially above the lower end of the plates 11, 12 at a distance d3. Preferably the distance d1 is less than d2 and d3.

The kinematics of cap 1 are as follows. During the first unscrewing, the cap 1 leaves the closed position and moves from the lower ring 9 to the released position shown in FIG. 3. Fragile bridges break during this movement. Moreover, during this unscrewing movement of the cap 1, the lower ring 9 is rotated about the X-axis, and as the cap 1 moves away from the crimp collar 5, the second section 17 of the lower ring 9 is rotated to a raised position.

Subsequently, the cap 1 can be rotated back toward its inclined open position in which the outer peripheral skirt 14 extends upward from the top wall 13. As the cap 1 is moved back toward its inclined open position, the strip 23 abuts the protruding portion 24 and thereby causes rotation the second section 17 of the lower ring 9, which rotates from a raised position to a lowered position.

The stretching capabilities of the plates 11, 12, together with the above-mentioned features of the locking device, make it possible to create a rigid point during tilting of the cap 1 between the released position shown in FIG. 3, and the inclined open position shown in FIG. 4 and 5. In other words, the plates 11, 12, as well as the locking device, are designed in such a way that during the first part of the movement of the cap 4 from the released position to the inclined open position, the two elastic plates 28, 29 due to the support of the strip 23 on the protruding part 24 is subjected to a tensile force that increases up to an intermediate unstable position and then decreases from said intermediate unstable position to an inclined open position. This allows cap 1 to be fixed in an inclined open position.

As shown in FIG. 5 and 6, when the second section 17 of the lower ring 9 is in the lowered position and the cap 1 is in its inclined open position, the strip 23 abuts the projecting part 24, which is thus inserted between said strip 23 and the crimp collar 5.

Thus, the cap 1 remains in its inclined open position since, due to the above arrangement, the cap 1 cannot be rotated to a released position in which the cap 1 faces the dispensing hole 3 while the second section 17 of the lower ring 9 remains in the lowered position.

It is advantageous that when the cap 1 is in its inclined open position and the second section 17 of the lower ring 9 is in the lowered position, the opening angle of the cap 1 is greater than 120° and preferably greater than or equal to 145°, and for example is of the order of 180° . The opening angle corresponds to a projecting corner section that is formed at the intersection between a plane parallel to the top wall 13 of the cap 1 and a horizontal plane.

To close the cap 1 again, the user tilts the cap 1 forward to the released position. During this inclination, the contact between the strip 23 and the protruding part 24 disappears, which allows the second section 17 of the lower ring 9 to move into a raised position.

With the second section 17 in its raised position and the cap 1 in the released position, said cap 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 section 17 of the lower ring 9 is rotated to the lowered position as the cap 1 approaches the crimp collar 5.

An advantage is that the closure assembly is molded in one piece from a synthetic material such as polyethylene and preferably high density polyethylene. The advantage is that the closure device is molded in the configuration shown in FIG. 1, i.e. in a closed position in which it can be mounted directly on the neck 2 of the container.

Although the invention has been described with respect to several specific embodiments, it is more than obvious that it is in no way limited to them, and that it includes all technical equivalents of the described means, as well as combinations thereof, if they fall within the scope of the invention as defined by the claims.

The use of the verbs “consists of” or “includes” and their conjugated forms does not exclude the presence of other elements or steps other than those defined in the claims.

In the claims, any reference numerals enclosed in parentheses should not be construed as limiting the claim.

Claims (24)

1. Unit for closing the container opening, consisting of: - a container neck, wherein the neck consists of a dispensing hole, a screw thread twisting around an X axis, which is provided on the neck, and a crimp collar; And - a closure device that contains: - a lower ring, axial, attached to the neck and configured to move on the neck about said axis X, wherein said lower ring consists of a first section consisting of engaging elements that project radially into the lower ring and are located below the crimp collar for holding a lower ring in an axial direction on the neck of the container, and a second section, each of the first section and the second section of the lower ring being pivotally connected to each other such that the second section rotates relative to the first section between a lowered position in which the second section is to be located below the crimp collar, and a raised position in which the second section is located at least partially above the crimp collar; - a cap that includes a top wall and an outer peripheral skirt, wherein the outer peripheral skirt has a screw thread configured to engage a neck screw thread to allow movement of the cap between a closed position and a released position in which the screw thread of the cap is no longer engaged with the cap. screw thread neck; And - a hinge device consisting of two plates connecting the outer peripheral skirt and the second section and configured to allow the cap to rotate between a released position and an inclined open position in which the cap is released from the neck opening; wherein the second section of the lower ring is configured to be positioned in a lowered position when the cap is in an inclined open position; wherein the closure device further comprises a locking device configured to lock the cap in an inclined open position, wherein said locking device comprises: - a heel which projects in the axial direction from the outer peripheral skirt between the two plates of the hinge device and which consists of a strip projecting outwards in the radial direction; And - a projecting part that projects axially from the second section of the lower ring between the two plates of the hinge device; wherein the strip and the protruding part are designed in such a way that when the cap is in the inclined open position and the second section of the lower ring is in the lowered position, the protruding part is held between the strip and the crimp collar. 2. Node according to claim 1, in which e1 > L - e2, where L is the length of the plates in the original state, in which the cap is in the closed position; e1 is the radial distance between the contact area of the strip designed to come into contact with the protruding portion when the cap is in the inclined open position, and the intersection between a straight line passing through the upper ends of the plates and the plane of symmetry of the plates relative to each other; And e2 is the radial distance between the contact area of the protruding part intended to come into contact with the strip when the cap is in the inclined open position, and the intersection between a straight line passing through the lower ends of the layers of plates and the plane of symmetry. 3. Knot according to item 2, in which e1 > L - e2 + e3 + e4, where e3 is the radial gap between the lower ring and the neck in accordance with the direction radial to the direction of the X axis and inscribed in the symmetry plane P; And e4 - radial clearance between the protruding part and the crimp collar. 4. The unit according to claim 3, in which e1 = L - e2 + e3 + e4 + Δ, where Δ ranges from 0.05 to 2 mm. 5. Unit according to any one of paragraphs. 1-4, in which the protruding portion extends beyond the lower boundary of the outer peripheral skirt. 6. Unit according to any one of paragraphs. 1-5, in which the first section of the lower ring consists of a front region that is diametrically opposed to the second section and two engaging regions, each of which is located between the front region of the first section and the second section, and wherein the engaging elements are located only in these two areas to allow the lower ring to move sufficiently radially to facilitate passage of a portion of the second section on each side of the crimp collar as the second section moves between the lowered position and the released position. 7. Unit according to any one of paragraphs. 1-6, in which the plates and the locking device are designed in such a way that during the rotational movement of the cap between the closed position and the inclined open position, the elastic plates are subjected to a tensile force, increasing up to an intermediate unstable position and then decreasing from said intermediate position to the inclined open position position. 8. Unit according to any one of paragraphs. 1-7, in which the closure device is molded in one piece. 9. Unit according to any one of paragraphs. 1-8, in which the lower ring is connected to the outer peripheral skirt by frangible bridges. 10. Unit according to any one of paragraphs. 1-8, in which, when the cap is in its inclined open position and the second section of the lower ring is in the lowered position, the opening angle of the cap (1) is greater than 120°.