FR3086929A1 - COSMETIC DISPENSING HEAD, DEVICE AND ASSOCIATED METHOD - Google Patents

Abstract

The head comprises a tubular distribution conduit (26) having a thread (42) outside a cover (31) closing the conduit (26). It comprises a cap (22) having a thread (58) complementary to the thread (42) provided with a member for piercing the cover (31) projecting into a distribution passage (28) defined by the conduit (26) .. The head has a locking mechanism (29) in the position of the cover (22) in a storage position comprising at least one stop (98) carried by the cover and at least one complementary stop (100) on the duct ( 26), to prevent axial displacement along the central axis of the cap (22) away from the conduit (26). The cap (22) has, at the inner end of the thread (58), a bearing surface on the outer end of the thread (42), the thread (42) being disengaged from the thread (58) in the storage position .

Description

Cosmetic product dispensing head, device and associated method

The present invention relates to a cosmetic product dispensing head comprising:

a tubular distribution duct defining a dispensing passage for the cosmetic product, the tubular duct having an external thread, and

- a seal closing the tubular conduit and preventing the passage of the cosmetic product,

- A cap having a tapping complementary to the thread of the tubular conduit, the cap being provided with at least one opening for dispensing cosmetic product and at least one member for piercing the cover projecting in the product distribution passage cosmetic, the thread of the cap being suitable for being screwed onto the thread of the conduit between a storage position, in which the piercing member is disposed away from the cover and a position for piercing the cover.

The invention also relates to a device for packaging and dispensing cosmetic product closed by such a dispensing head.

The head is in particular intended to close the reservoir of a device for packaging a cosmetic product for coloring hair, in order to avoid contact of the cosmetic product with oxygen, likely to cause its deterioration, or even the degradation of its properties.

More generally, the cosmetic product is for example a hair product, a hygiene product, a face and / or body care product, a makeup product, or a sun protection product.

A cosmetic product is advantageously a product as defined in Regulation EC No. 1223/2009 of the European Parliament and of the Council, dated November 30, 2009, relating to cosmetic products.

GB 2 316 397 describes a dispensing head of the aforementioned type. This head has a perforator cap with a spacer ring between the cap and the container, ensuring the integrity of the seal before the first use. The cap is surmounted by a cap allowing the tube to be opened as desired. At the first use of the cosmetic product contained in the container, the user removes the cap, then the ring. He then screws the stopper onto the tube head until the perforation of the seal, which frees the passage of the product.

Such a device is not entirely satisfactory. In particular, the implementation of the above steps in order to use the device is tedious. The presence of the spacer ring screwed between the cap and the container obliges the user to unscrew the cap, remove the ring, then screw the cap back on to be able to release the product, which is time-consuming and not intuitive.

Furthermore, the use of a spacer ring between the stopper and the container increases the number of parts within the aforementioned device, which generates an additional cost for the latter. This also harms the environmental performance of the device, this additional part being thrown away the first time the device is used.

An object of the invention is to have a head allowing the safe storage of the cosmetic product in a container, while offering an easy-to-use gesture, and presenting a reduced financial and environmental cost.

To this end, the invention relates to a dispensing head of the aforementioned type, in which the head further comprises:

a locking mechanism in position of the cap in the storage position comprising at least one stop carried by the cap and at least one complementary stop on the external peripheral surface of the tubular conduit, the stop and the complementary stop cooperating in the position of storage to prevent axial movement along the central axis of the cap away from the tubular conduit, the cap having, in the storage position, at the inner end of the thread, a bearing surface on the outer end of the thread, the thread being disengaged from the thread in the storage position.

The cap and the piercing member being formed in one piece, the dispensing head is solid and reliable. The gesture is simplified because the piercing of the lid is done in a single screwing gesture.

The locking mechanism allows the capsule to be held securely in the storage position. In the storage position, the piercing member is locked axially with respect to the tube head in both directions along this axis.

A single rotational movement and minimal effort on the part of the user are then necessary to pierce the seal and be able to use the product.

In a particular embodiment of the invention, the dispensing head has the following characteristic:

- the locking mechanism comprises a hard point arranged at the outer end of the thread to block the cap in rotation, the inner end of the thread being in contact with the hard point in the storage position, the hard point being suitable for being crossed to allow screwing in relation to the tubular conduit.

The hard point prevents untimely screwing of the cap on the tube head during transport, for example in the event of vibrations or a fall, or during storage, in particular if the product is handled. The hard point is intended to be crossed just before use of the product and acts as additional security against the risk of unwanted piercing of the seal.

In a variant, the dispensing head comprises at least one following characteristic:

- The cap has an internal peripheral surface directed towards the central axis, the stop protruding from the internal peripheral surface of the cap;

- The tubular conduit has an external peripheral surface directed opposite the cap, the thread projecting from the external peripheral surface, the complementary stop being formed by an annular projection located at the internal end of the thread.

The stopper of the cap as well as the complementary stopper of the tubular conduit, once the labeling has been carried out during the manufacturing step, prevent the disassembly of the cap vis-à-vis the tubular conduit during subsequent uses of the product. Thus, the device is made reliable and solid in that the cap is immobilized with the reservoir.

The possibly discontinuous nature of the annular projection on the internal peripheral surface of the cap ensures simple mounting of the cap on the duct, in particular by a pure translational movement.

In a variant, the dispensing head comprises at least one following characteristic:

- The piercing member delimits an internal light for dispensing the cosmetic product opening out through the dispensing opening;

- The piercing member is an internal skirt having an external peripheral surface of a shape complementary to the internal peripheral surface of the tubular conduit.

The piercing member, in particular when it has a barrel shape, ensures effective guiding of the product when it follows the internal peripheral surface of the tubular conduit. The backlash is limited and the structure is solid and robust.

In a variant, the dispensing head comprises at least one following characteristic:

- The tubular conduit comprises, at its base, on the external peripheral surface, at least one anti-unscrewing notch cooperating with the stop on the cap in the drilling position;

- The or each anti-unscrewing notch has a draft from the external peripheral surface of the tubular distribution conduit.

The anti-unscrewing notches prevent, once the screwed position is reached, the unscrewing of the cap vis-à-vis the tubular conduit, which allows re-use of the head if all the product is not consumed at the first use. If the user nevertheless wishes to unscrew the cap, this operation is made possible by notches which allow the disassembly in force.

In a variant, the dispensing head comprises at least one following characteristic:

- A member for holding in position the piercing member disposed on an internal peripheral surface of the tubular conduit and / or on an external peripheral surface of the piercing member;

- the position holding member is a drop-shaped projection

The position holding members ensure the absence of any collapsing in the storage position. The absence of play makes the device more robust and its handling is safer.

In a variant, the dispensing head has the following characteristic:

- a cap articulated on the cap, movable between a closed position of the product distribution opening and a position of opening the cosmetic product distribution opening.

- a pin fitting into the product dispensing opening in the closed position.

The articulated cap allows easy opening and closing of the cosmetic product distribution device, in particular by making it possible to handle it with one hand when the user wishes to use the product. The pin inserted into the dispensing opening of the cosmetic product prevents, during the periods of storage of the device, that the product does not accumulate in the mouthpiece and is oxidized and / or dried in the open air to form a deposit. In addition, when the user uses the device, the pin prevents unwanted projections during the opening of the cap, which can lead to dirt.

In a variant, the dispensing head comprises at least one following characteristic:

.- the outer peripheral surface of the outer skirt defines a notch, located opposite the cap when the cap is in the closed position of the dispensing opening of the cosmetic product.

- The outer skirt has a rounded downstream distribution edge.

The cut-out facilitates the opening of the cosmetic product dispensing device by allowing the user to easily lift the cap when he wishes to use the product. The rounded dispensing edge allows a clean withdrawal of the cosmetic product with the finger.

The invention also relates to a device for packaging and dispensing cosmetic product, comprising a reservoir containing a cosmetic product and a tube head as defined above.

The subject of the invention is also a method of distributing a cosmetic product comprising the following steps:

- Provision of a device as defined above, the cap being in its storage position, the cap of the cap being in the closed position, the tapping being disengaged from the thread, the stop on the cap cooperating with the complementary stop ,

- rotation of the cap to pass the piercing member into the piercing position of the cover,

- displacement of the articulated cap on the cap in the open position away from the tubular distribution duct,

- distribution of cosmetic product through the tubular distribution conduit.

Other characteristics and advantages of the invention will appear on reading the description which follows, given only by way of example, and made with reference to the appended drawings in which:

FIG. 1 is a sectional view along a median axial plane of a tube head of a packaging and dispensing device according to the invention, the cap being snapped onto the tubular conduit and in the storage position,

FIG. 2 is a view similar to FIG. 1, after screwing the cap on the tubular conduit, the cover having been pierced,

FIG. 3 is a view similar to FIG. 2, after opening the cap on the cap,

FIG. 4 is a perspective view from above of the tubular distribution duct and of the shoulder of the reservoir, the cap having been removed,

- Figure 5 is a view similar to Figure 4, taken in section along a median axial plane, from the inside of the tubular distribution duct,

- Figure 6 is a perspective view from below of the cap.

In all that follows, the terms “upstream” and “downstream” generally mean with respect to the normal direction of distribution of the product during use.

A device 10 for packaging and distributing a cosmetic product is illustrated in FIGS. 1 to 3.

The cosmetic product is for example a cosmetic product for coloring, care, or make-up. It advantageously contains a compound liable to degrade by contact with air, in particular by contact with oxygen in the air.

The device 10 comprises a reservoir 12 containing the cosmetic product 14 and a tube head 17, mounted on the reservoir 12.

The reservoir 12 has a side wall 18, a bottom not shown in the figures and a downstream end 20. At the downstream end 20, the reservoir 12 defines an upper opening intended for the outlet of the cosmetic product 14 from the reservoir 12.

The tube head 17 comprises a tubular conduit 26 defining an axial distribution passage 28 for the cosmetic product 14 and a cap 22 mounted on the tubular conduit 26 between a storage position and a use position, the cap 22 being intended to close the tubular conduit 26 downstream. The tube head 17 further comprises a cap 24 mounted on the cap 22 and intended to cover the cap 22, as well as a locking mechanism 29.

The tubular conduit 26 extends along a longitudinal axis A-A 'which is vertical in FIG. 1. It has a connection edge 30 at the downstream end 20 of the reservoir 12 as well as a cover 31 closing the tubular conduit 26 , advantageously opposite the connecting edge 30.

The tubular conduit 26 has an internal peripheral surface 32 directed towards the central axis A-A ’.

The internal peripheral surface 32 of the tubular conduit 26 has at least one shoulder 34 and has at least one projection 38 for holding the cap 22 in position, visible in FIG. 5. The projection 38 has, for example, a drop shape. Such a form of drop is in particular advantageous in the context of the demolding of the tubular conduit, this form of drop allowing a demolding in force of the base without degrading its geometric and structural integrity.

The tubular conduit 26 also has an external peripheral surface 40 directed opposite the central axis A-A ’.

The outer peripheral surface 40 of the tubular conduit 26 has an external thread 42.

The cap 22 is here mounted on the tubular conduit 26. It comprises an outer skirt 52, which at least partially covers the outer peripheral surface 40 of the tubular conduit 26, an inner skirt 60 and a connecting wall 62 between the outer skirt 52 and the internal skirt 60.

The outer skirt 52 and the inner skirt 60 form two free concentric cylinders at an upstream end. The connecting wall 62 joins the downstream ends of the outer skirt 52 and the inner skirt 60. The connecting wall 62 extends radially from the inner skirt towards the outer skirt and delimits the mouth of the cap 22.

The external skirt 52 has an internal peripheral surface 56, having a tapping 58 complementary to the threading 42 of the tubular conduit 26, and an external peripheral surface 57. The tapping 58 is disposed on a downstream region of the external skirt 52 adjacent to the connecting wall 62. A downstream region of the internal peripheral surface 56 of the external skirt 52 is devoid of internal thread and has a smooth surface.

The internal thread 58 is able to cooperate with the thread 42 to allow the cap 22 to be screwed onto the tubular conduit 26 between the initial storage position, illustrated in FIG. 1, where the cover 31 is intact, and the drilling position of the cover 31, illustrated in FIG. 2.

The external peripheral surface 57 of the external skirt 52 has a notch 57A as well as a downstream distribution edge 57B.

The notch 57A is located in a downstream region of the outer peripheral surface 57 adjacent to the downstream edge 57B. The dispensing edge 57B is rounded and is located downstream of the notch 57A.

The internal skirt 60 has an external peripheral surface 66 directed opposite the central axis A-A ’.

The external peripheral surface 66 has at least one shoulder 68 intended to cooperate with the or each shoulder 34 on the internal peripheral surface 32 of the tubular conduit 26 and with the or each projection 38 for holding in position to limit any movement of the collapsing in the position of drilling.

The internal skirt 60 also has an internal peripheral surface 72 directed towards the central axis A-A ’.

The internal peripheral surface 72 has grooves 76 parallel to the central axis A-A ’and has downstream a projection 74 for blocking the cap 24 as well as a chamfer 75.

The internal skirt 60 has a free edge 78 at its upstream end. The free edge 78 is provided with teeth 80 intended to tear the cover 31 when the cap 22 is screwed onto the tubular conduit 26 when the drilling position is reached. Thus, the internal skirt 60 constitutes a member for piercing the cover 31.

The internal peripheral surface 72 of the internal skirt 60 internally delimits a light for circulation of the cosmetic product from the tank 12 towards the outside which opens downstream onto an opening 82 for dispensing product.

The cap 24 is mounted on the cap 22. It is movable in rotation about a horizontal axis B-B ’extending in a plane perpendicular to the axis A-A’, by means of a hinge 88.

The articulation 88 is here a film of material between the cap 24 and the cap 22 located opposite the notch 57A.

The cap 24 has a peripheral flange 91 and a central pin 92 which projects in the center of the peripheral flange 91.

The cap 24 is movable by the user by pivoting it around the axis B-B 'between a closed position preventing the passage of the cosmetic product towards the outside and an open position allowing this passage.

In this example, as visible in FIG. 2, the pin 92 has a downstream sleeve 91A which extends from the flange 91 and an upstream transverse wall 91B which seals the downstream sleeve 91A at its free edge.

In the closed position, the peripheral flange 91 is applied to the connecting wall 62. The pin 92 is inserted into the central lumen being guided by the chamfer 75. The notch 57A extends opposite the region free of cap 24, located opposite hinge 88.

The cap 24 is held in the closed position by pressing protrusions 74 on the pin 92 which also seal the cap 22.

The pin 92 being inserted into the internal lumen prevents the accumulation of product in the mouth of the cap 22 and the oxidation and / or drying of the product in the open air to form a deposit. Furthermore, when the user uses the device, the pin 92 avoids unwanted projections during the opening of the cap 24 and which can lead to dirt.

In the open position, the pin 92 has been moved away from the internal lumen to clear the dispensing opening 82. The cosmetic product is then able to flow through the dispensing opening 82.

In this example, the cap 24, the cap 22 and the articulation 88 are made in one piece having come from one material.

According to the invention, the locking mechanism 29 comprises at least one stop 98 on the cap 22, visible in FIG. 6, a complementary stop 100 on the tubular conduit 26, visible in FIG. 5, the or each stop 98 being clean to cooperate with the complementary stop 100 in the storage position.

The locking mechanism 29 also advantageously comprises a hard point 104 on the thread 42, visible in FIG. 4, as well as at least one anti-unscrewing notch 108, also visible in FIG. 4.

Each stop 98 is here formed by a discrete tab projecting from the internal peripheral surface 56 of the external skirt 52, as illustrated in FIG. 6.

In the assembly presented in FIG. 6, the blocking mechanism 29 comprises several pairs of adjacent stops 98. Each pair of stops 98 has a first stop 98A provided with an inclined ramp and an adjacent stop 98B without an inclined ramp. Each stop 98A has a downstream surface 99 in the form of a bevel to facilitate its snap-fastening.

The complementary stop 100 projects radially beyond the thread 42 away from the axis A-A ’. The complementary stop 100 has an upstream surface 101 in the form of a bevel to facilitate snap-fitting.

In the example of FIG. 4, the complementary stop 100 is an annular projection located at the upstream end of the thread 42, projecting from the external peripheral surface 40 of the tubular conduit 26.

The cooperation between each stop 98 and the complementary stop 100 in the storage position, the stop 98 passing under the complementary stop 100, prevents the displacement of the cap 22 along the axis A-A 'away from the conduit tubular 26.

In the storage position, a downstream surface of the thread 42 cooperates, in addition, with an upstream surface defined by the thread 52 to prevent, before screwing, the axial displacement of the cap 22 towards the reservoir 12 and thus wedge the cap 22 in position on duct 26.

As illustrated in FIG. 4, the hard point 104 is disposed at the outer end of the thread 42 to block the cap 22 in rotation in the storage position. The inner end of the internal thread 58 is then supported on the hard point 104 which is suitable for being crossed to allow the cap 22 to be screwed onto the tubular conduit 26.

The or each anti-unscrewing notch 108 is disposed on the external peripheral surface 40 at the base of the tubular conduit 26, downstream of the thread 42. In the drilling position, the or each anti-unscrewing notch 108 cooperates with each stop 98 of the cap 22 to prevent the cap 22 from being unscrewed away from the tubular conduit 26.

Each anti-unscrewing notch 108 has a draft 110, visible in FIG. 4, from the external peripheral surface 40 of the tubular conduit 26 allowing the cap 22 to be demolded by force with respect to the anti-unscrewing notches 108 and a ramp 112 for inserting the stops 98.

The method of mounting the device 10 for packaging and distributing a cosmetic product will now be described.

Initially, the cap 22 is supplied dissociated from the tubular conduit 26, the tubular conduit 26 being sealed by the cover 31. The cap 22 is positioned opposite the tubular conduit 26, so that the axis of revolution of the internal skirt 60 coincides with the axis A-A '. The cap 22 is then moved in translation along the axis A-A ′ in the direction of the reservoir 12. The internal skirt 60 is then inserted into the tubular conduit 26.

The stop 98 engages and snaps onto the complementary stop 100 thanks to the cooperation between the inclined surfaces 99 and 101. After snap-fastening, the inner end of the thread 58 is in contact with the hard point 104 at the outer end of the thread 42.

The device 10 is then in the storage position. The thread 42 is not engaged in the internal thread 58. However, the support of the downstream surface of the cap at the level of the internal thread 58 on the upstream surface of the conduit at the level of the thread 42 ensures an axial setting of the cap 22 by relative to the tubular conduit 26. The hard point 104 at the outer end of the thread 42 prevents the untimely screwing of the cap 22 on the tubular conduit 26.

The locking of the stopper of the cap 98 on the complementary stop 100 prevents the cap 22 from being translated along the axis A-A ’away from the reservoir 12.

In the storage position, the or each projection 38 present on the internal peripheral surface 32 of the tubular conduit 26 is supported radially on the internal skirt 60 of the cover 22 to keep it stable and to avoid any movement of the cover of the cover 22 screws opposite the tubular conduit 26.

The method of using the device 10 for packaging and distributing a cosmetic product will now be described.

Initially, the device 10 is in the storage position. The user grasps the cap 22 and rotates it around the axis A-A 'to cross the hard point 104. After passing the hard point 104, the cap 22 is screwed onto the tubular conduit 26. In conjunction with its rotation around from the axis A-A ', the internal skirt 60 moves in translation along the tubular conduit 26 until it pierces the cover 31.

In this position, as illustrated in FIG. 2, the shoulders 34 and 68, respectively on the internal peripheral surface 32 of the tubular conduit 26 and on the external peripheral surface 66 of the internal skirt 60, as well as the or each projection 38 present on the internal peripheral surface 32 of the tubular conduit 26, stabilize the cap 22 with respect to the tubular conduit 26 and avoid any backlash.

In the drilling position, the teeth 80 at the free end of the internal skirt 60 have perforated the cover 31. Furthermore, as visible in FIG. 2, the stop 98 in discontinuous annular projection engages on the or each anti-unscrewing notch 108. Thus, the unscrewing of the cap 22 with respect to the tubular conduit 26 is prevented.

In the case where the user still wishes to unscrew the cap 22, the draft 110 present on each anti-unscrewing notch 108 allows the release in force of the stop 98 with respect to or each anti-unscrewing notch 108 .

Once the drilling position has been reached, the user opens the cap 24 by lifting it at the notch 57A and folding it down thanks to the articulation 88 to free the axial distribution passage 28. The device is then in the configuration of FIG. 3.

The user then tilts the device 10 and / or presses on the reservoir 12 if the latter is deformable for dispensing the cosmetic product 14 through the axial distribution passage 28 outside the device 10. The user can withdraw the produced cleanly with the finger while resting on the rounded dispensing edge 57B.

This being done, the user closes the cap 24 by folding it down thanks to the articulation 88. The pin 92 again obstructs the axial distribution passage 28. Thus, outside periods of use, the cap 24 prevents contact of the cosmetic product 14 with the air and therefore prevents its oxidation.

Thanks to the invention described above, the gestures for piercing the cover 31 are greatly simplified. In addition, the blocking mechanism 29 allows safe storage of the cosmetic product 14 during the storage periods and during the periods of non-use after opening the cover 31, which preserves the activity of the cosmetic product over a longer period of time. time.

In a variant, not shown, the internal peripheral surface 32 of the tubular conduit 26 does not have any projection. The outer peripheral surface 66 has at least one projection, which may be in the form of a drop. The or each projection on the external peripheral surface 66 fills the space present between the internal skirt 60 and the tubular conduit 26 and thus prevents any movement of the covering of the cover 22 relative to the axis A-A 'of the tubular conduit 26 when the cap 22 is in the storage position.

Claims (16)

12 CLAIMS 1. - Head (17) for dispensing cosmetic product, comprising: a tubular distribution conduit (26) defining a distribution passage (28) for the cosmetic product (14), the tubular conduit (26) having an external thread (42), and - a cover (31) closing the tubular conduit (26) and preventing the passage of the cosmetic product (14), - A cap (22) having a thread (58) complementary to the thread (42) of the tubular conduit (26), the cap (22) being provided with at least one opening (82) for dispensing cosmetic product and at at least one piercing member of the cover (31) projecting into the dispensing passage (28) of the cosmetic product (14), the thread (58) of the cap (22) being suitable for being screwed onto the thread (42 ) of the conduit between a storage position in which the piercing member is disposed away from the cover (31) and a piercing position of the cover (31), characterized by: - A locking mechanism (29) in the position of the cover (22) in the storage position comprising at least one stop (98) carried by the cover and at least one complementary stop (100) on the external peripheral surface (40) of the tubular conduit (26), the stop (98) and the complementary stop (100) cooperating in the storage position to prevent axial movement along the central axis of the cap (22) away from the tubular conduit (26), the cover (22) comprising, in the storage position, at the inner end of the thread (58), a bearing surface on the outer end of the thread (42), the thread (42) being disengaged from the thread (58) in the storage position. 2, - head (17) according to claim 1, wherein the locking mechanism (29) comprises a hard point (104) disposed at the outer end of the thread (42) for rotationally blocking the cap (22), l 'inner end of the thread (58) being supported on the hard point (104) in the storage position, the hard point (104) being adapted to be crossed to allow screwing relative to the tubular conduit (26). 3. - Head (17) according to any one of the preceding claims, in which the cap (22) has an internal peripheral surface (56) directed towards the central axis, the stop (98) projecting from the surface. internal device (56) of the cap (22). 4, - head (17) according to claim 3, wherein the tubular conduit (26) has an outer peripheral surface (40) directed opposite the cap (22), the thread (42) projecting from the surface external device (40), the stop 13 complementary (100) being formed by an annular projection located at the inner end of the thread (42). 5. - Head (17) according to any one of the preceding claims, in which the piercing member delimits an internal light for dispensing the cosmetic product (14) opening out through the dispensing opening (82). 6. - Head according to claim 5, wherein the piercing member is an internal skirt (60) having an external peripheral surface (66) of shape complementary to an internal peripheral surface (32) of the tubular conduit (26). 7. - Head (17) according to any one of the preceding claims, in which the tubular conduit (26) comprises, at its base, on its external peripheral surface (40), at least one cooperating anti-unscrewing notch (108) with the stop (98) on the cover (22) in the drilling position. 8. - Head (17) according to claim 7, wherein the or each anti-unscrewing notch (108) has a draft (110) from the external peripheral surface (40) of the tubular distribution conduit (26). 9. - Head (17) according to any one of the preceding claims, comprising at least one member (38) for holding in position the piercing member disposed on an internal peripheral surface (32) of the tubular conduit (26) and / or on an external peripheral surface (66) of the piercing member. 10. - Head (17) according to claim 9, wherein the position holding member (38) is a projection (38) in the form of a drop. 11- Head (17) according to any one of the preceding claims, comprising a cap (24) articulated on the cap (22), movable between a position for closing the opening (82) for dispensing the product and a position d opening of the opening (82) for dispensing the cosmetic product (14). 12, - head (17) according to claim 11, wherein the cap (24) comprises a pin (92) fitting into the opening (82) for dispensing product in the closed position. 13, - Head (17) according to any one of claims 11 to 12, in which the external peripheral surface (57) of an external skirt (52) of the cap (22) defines a notch (57A), located in look of the cap (24) when the cap (24) is in the closed position of the opening (82) for dispensing the cosmetic product (14). 14, - Head (17) according to any one of the preceding claims, in which an external skirt (52) of the cover (22) has a rounded downstream distribution edge (57B). 15. - Device (10) for packaging and dispensing cosmetic product (14), comprising a reservoir (12) containing a cosmetic product (14) and a tube head (17) according to any one of the preceding claims, mounted on the tank (12). 16. - Method for distributing a cosmetic product (14) comprising the following steps: - Supply of a device (10) according to claim 15, the device (10) comprising a cap (24) articulated on the cap (22), movable between a position for closing the opening (82) for dispensing the product and a position for opening the opening (82) for dispensing the cosmetic product (14), the cap (22) being in its storage position, the cap (24) of the cap (22) being in the closed position , the thread (58) being disengaged from the thread (42), the stop (98) on the cover (22) cooperating with the complementary stop (100), - rotation of the cap (22) to pass the piercing member into the piercing position of the cover (31), - displacement of the cap (24) articulated on the cap (22) in the open position away from the tubular distribution conduit (26), - distribution of cosmetic product (14) through the tubular distribution conduit (26).