Abstract:
The present invention relates to a pot for a cosmetic product, the pot being opened by rotating a lid thereby bringing about a relative rotation between a cover and a mounting plate forming the lid, and thereby causing the pivoting of coupling elements which, in a closed position of the pot, are engaged in at least one cutout formed in a neck of a base of the pot.

Description:
BACKGROUND 
     1. Field of the Invention 
       [0001]    The present application concerns the field of pots, and in particular cosmetics pots. 
       2. Description of the Background 
       [0002]    Conventionally, a pot for a cosmetic product comprises a base, generally of glass or of plastic, that is to say a container surmounted by a neck of which size of the diameter is in the vicinity of cross-section dimensions of the base, to have a wide opening. The base is closed by a lid, generally screwed onto the neck. The lid is furthermore generally equipped with a seal having the role of providing sealing for closing for good preservation of the product contained. 
         [0003]    However, a drawback lies in the fact that the thread of the screw thread formation present on the neck requires there to be a neck clear from the rest of the base over a certain height and also a lid of a relatively great height. In other words, the presence of the screw thread formation imposes constraints in terms of dimensions for the height of the neck and the thickness of the lid. 
         [0004]    Moreover, in particular for a round pot that has no stop for screwing, a user who closes the pot has difficulty determining when the tightening of the lid on the base is right. Excessive tightening over time induces crushing of the seal. Insufficient tightening means that the seal does not provide proper sealing. In both cases, the air can enter the pot or volatile products of the formula, that is to say of the product contained in the pot, can escape from the pot, such that a risk arises of the formula degrading over time. 
         [0005]    For a pot of non-circular shape of which the base and the lid have identical contours, the pot often has a stop that limits the angular travel of the lid in relation to the base so as always to have coinciding shape between the base and the lid. The presence of the stop thus prevents over-screwing, and therefore compensates for a loss of sealing in case the seal is crushed. 
         [0006]    The document US2004/0067091 is known for example which describes a bottle, typically for nail polish, which enables closing by clipping the cap onto the container and opening by pressing on at least one button acting on an elastic ring. A spring device furthermore enables fluid-tight closing of the bottle to be provided to avoid any spilling of the product it contains. Such a cap however has the drawback of being particularly bulky, and in particular engendering a relatively great height to house the device therein. Furthermore, such an embodiment is suitable for a bottle of which the neck has a small diameter, but could be difficult to apply to a pot of which the neck has an appreciably greater diameter. 
       SUMMARY 
       [0007]    To solve at least some of the aforementioned drawbacks, the present invention is directed to providing a pot with a lid that is simple to use to close or open the pot, which enables reliability of closing to be ensured and which moreover leads to other advantages. 
         [0008]    To that end, according to a first aspect, there is provided a cosmetic pot comprising a base and a lid to close the base, wherein: 
         [0009]    the lid comprises an inside part, termed coupling plate, and an outside part, termed cap, the coupling plate and the cap being rotatably mounted in relation to each other, such that the lid is configured to adopt a resting position and an opening position in which the coupling plate and the cap are turned in relation to each other in relation to the resting position,
       the coupling plate comprising:
           a support,   at least one coupling member mounted on the support and tiltable in relation to it, the at least one coupling member comprising a claw, the at least one coupling member being configured to adopt at least a first position when the lid is in resting position and a second position when the lid is in opening position, the second position being a position in which the at least one coupling member is tilted in relation to the first position, and   at least one coupling return member linked to the support, the at least one coupling return member being configured to bring the at least one coupling member back into the first position, and   
           the cap comprising an axial cam, the axial cam being defined by a profile forming at least one active zone projecting in relation to a bottom of the lid, and the axial cam cooperating with the at least one coupling return member and being configured to elastically deform the at least one coupling return member driving tilting of the at least one coupling member,       
 
         [0015]    and the base comprises a neck provided with at least one peripheral indentation, the claw of the at least one coupling member of the lid being engaged in the at least one indentation of the neck of the base when the lid is in resting position and the pot is closed. 
         [0016]    An “axial cam” here means a cam with axial transmission, that is to say that the translational movement it causes, and more particularly here the deformation of the at least one coupling return member, is along the same axis as the rotational axis around which it turns. This type of cam is also called an “end cam” in some fields. 
         [0017]    According to an exemplary embodiment, the coupling member comprises a return arm. 
         [0018]    The return arm of a coupling member is for example a part of the coupling member by which the coupling member is brought back to the first position or tilted into the second position. 
         [0019]    The coupling return member is for example an elastically deformable member, with a bump, that is to say an apex or a protuberance, which projects, facing the return arm of the at least one coupling member, for example from below. It is for example a spring type member, for example such as a wave washer. 
         [0020]    The indentation of the neck is configured here to form a longitudinal stop, that is to say in a vertical direction in relation to the pot, such that it is impossible to pull the lid to open the pot without turning it in order for the inside and outside parts to tilt in relation to each other to free the claw of a coupling member thus forming a hook, that is to say to say move it away from the neck so that it can be freed from the indentation. 
         [0021]    A rotation of the cap in relation to the coupling plate induces a movement of the claw enabling it for example to disengage from the indentation formed in the neck of the base. Provided no relative rotation is applied to the inside and outside parts of the lid, the lid is in resting position, and no force is applied to its various components. Wear of the lid is thus limited. 
         [0022]    The opening of the pot is achieved by the relative rotation of the outside cap and of the inside plate, but any relative rotation between the inside plate and the neck of the pot base is very limited or even avoided, such that a seal that may be present operates mainly in compression, minimizing shear forces, very present in the case of a screwed lid. 
         [0023]    The seal may be made of an adherent material, that is to say with poor slipping qualities. The sealing is thereby easier to achieve with efficiency and a large choice of materials and/or embodiments is possible for producing the seal. 
         [0024]    Furthermore, the pot is aesthetic since it is possible to dispense with the screw thread formation on the neck. The dimensional constraints on the height of the neck and the thickness of the lid imposed by the presence of a screw thread formation can thereby be avoided. 
         [0025]    Such a lid is also aesthetic because no part of its mechanism, with the possible exception of at least one claw, is visible to a user without recourse to dismantling the lid. Such a hidden mechanism enables a lid with an elegant shape to be obtained. 
         [0026]    The lid furthermore enables a high variability of volume, which enables different sizes to be produced, without being constrained by the bulk of the mechanism which it comprises, in particular in terms of height. 
         [0027]    The lid is also easily adaptable to any existing pot for example and may also be re-adapted later to another pot, of the same product or having a different capacity. This for example enables the lid to be customized and to be able to keep it in course of use of different pots, whether it be a pot of the same product, or of different products, whatever their capacity. 
         [0028]    Furthermore, in contrast to a screwed lid, the neck here is not necessarily of circular cross-section. It is possible to have a neck with any particular shape, oval, oblong, square, polygonal or other shape, provided that the lid has a matching and/or adapted shape. 
         [0029]    Concerning the cam, a “projecting active zone” here designates the part of the cam that enables the coupling return member to be acted upon. The projecting active zone has for example the shape of a bump or segment involute to a circle. In a particular embodiment, the cam profile has a regular contour to provide a more gentle rotational movement of the coupling plate in relation to the cap, without jolts. 
         [0030]    The cam is situated towards the center of the lid. On account of this, the torque that a user must apply between the base of the pot and the lid to induce the relative rotation of the cap in relation to the plate is small. This produces a lever arm effect between the periphery of the lid and the zone in which the cam is located. Whatever the case, the torque is lower than for a conventional screwed lid in which the torque applied by the user must overcome the friction forces between the lid and the neck which are localized at the periphery of the lid. 
         [0031]    The at least one coupling member in the second position is thus tilted in relation to the first position. Such a movement induced by the cam makes it possible to better ensure easy opening of the pot in use of the lid. 
         [0032]    Thus, at least by the effect of friction, the coupling plate is held orientated on the neck when the cap is turned until the at least one claw disengages from the indentation of the neck. 
         [0033]    The pot is thus hermetically closed and can be opened by a simple and rapid manipulation, in particular because such a lid enables the pot to be opened with a movement potentially less than or equal to a quarter turn (90°), or even approximately 45° in a particular embodiment, or even less for example such as approximately 15° or approximately 10°. 
         [0034]    Once open, the pot is easily closed again by clipping of the lid. In other words, the pot is closed simply by replacing the lid and pressing on the lid in order for the coupling member to pass the rim of the neck and engage under the rim, in an indentation. 
         [0035]    According to an advantageous arrangement, the lid comprises a position return member, the position return member being linked to the support of the coupling plate and furthermore being linked to the cap, the position return member being in a configuration referred to as “neutral” when the lid is in resting position and in a deformed configuration when the lid is in opening position, the position return member inducing a counter-rotation of the cap in relation to the coupling plate when the lid is in opening position so as to bring the lid automatically back into resting position. 
         [0036]    Such a position return member cooperates with the cam to facilitate the return to resting position of the lid. More particularly, according to an exemplary embodiment, the cam is configured in order for the resting position to be a position of stable equilibrium of the upper part in relation to the lower part, whereas the opening position is an unstable position such that the lid naturally tends to return to resting position in which the mechanical forces of the various components of the lid are minimum. The presence of a position return member enables this aspect to be reinforced to promote the lid always returning to resting position. 
         [0037]    According to a convenient exemplary embodiment, the position return member is a blade. The blade is for example held in a slot formed in the support of the coupling plate and also held in a slot formed in the cap. For example, the slot of the coupling plate and the slot of the cap are configured such that the position return member is in a natural position, that is to say not deformed, when the lid is in resting position. The position return member also acts as a rotation travel limiter between the cap and the coupling plate of the lid. 
         [0038]    Such a position return member is thus particularly easy to produce and to assemble with the other components of the lid. 
         [0039]    According to an advantageous exemplary embodiment, the axial cam has an annular shape. 
         [0040]    Such a cam thus makes it possible, for example, to elastically deform the at least one coupling return member, in particular if the latter comprises at least one wave washer, more homogeneously. 
         [0041]    It is furthermore easier to produce and to integrate into a cap of which the various components are generally of circular or cylindrical shape for example. 
         [0042]    For example, in resting position, the profile of the axial cam then espouse the profile of the wave washer, and during pivoting of the cap, the axial cam deforms the wave washer more homogeneously. 
         [0043]    Furthermore, such a cam is particularly convenient with a coupling member configured such that its claw engages in an indentation formed in an outside periphery of the neck, which makes it possible to avoid contact of the claw with the product contained in the pot, and thus ensure better hygiene. 
         [0044]    According to a particularly advantageous example, the at least one projecting active zone of the axial cam has a plane of symmetry such that the cap and the coupling plate of the lid are configured to turn in relation to each other in a clockwise or anticlockwise direction, in the same manner. 
         [0045]    Such a lid thus enables a manipulation equally easy for a left-handed user or a right-handed user, by enabling the inside part to be turned in relation to the outside part in the same manner in one direction or the other. 
         [0046]    According to a particularly advantageous exemplary embodiment, the lid comprises at least two tiltable coupling members each comprising a claw, each coupling member being configured to adopt a first position when the lid is in resting position and a second position when the lid is in opening position, the second position of each coupling member being a position in which each coupling member is tilted in relation to the first position, the claw of each coupling member of the lid being engaged in the at least one indentation of the neck of the base when the lid is in resting position and the pot is closed. 
         [0047]    According to an exemplary embodiment, each coupling member also comprises a return arm. 
         [0048]    Similarly, the return arm of each coupling member is for example a part of the corresponding coupling member by which the coupling member is brought back to the first position or tilted into the second position. 
         [0049]    Generally, each coupling member comprises a claw and a return arm. All the coupling members, when the lid has at least two of them, can be identical in a particular embodiment. 
         [0050]    According to an exemplary embodiment, the at least one coupling return member is of annular shape and has at least one bump, the at least one projecting active zone of the axial cam cooperating with the at least one bump of the at least one coupling return member when the lid is in opening position. 
         [0051]    According to an exemplary embodiment, the coupling return member comprises for example a bump under each of the return arms of the coupling members and the cam has for example the same number of projecting active zones as there are bumps in the coupling return member so as to be able to simultaneously tilt all the coupling members. 
         [0052]    However, the coupling members are independent. This independence enables a better adaptation to any type of base. In other words, this enables greater tolerance; the lid can better adapt to a base neck in order to maintain sealing, for example by always enabling compression of the seal. 
         [0053]    Furthermore, each projecting active zone for example has a same height for each angle of rotation of the lid in relation to the coupling plate and each bump of the coupling return member has a same height for each angle of rotation of the cap in relation to the coupling plate such that for a given angle of rotation, each corresponding coupling member is simultaneously tilted through a same angle. This makes it possible to produce a clearly defined and an easy opening of the pot when the lid is used. 
         [0054]    The projecting active zones, like the coupling members, are disposed with regular spacing in relation to each other according to a particular embodiment. Thus, in a case in which the lid comprises two coupling members and two projecting active zones on the cam, these are diametrically opposite, for example. Or, in a case in which the lid comprises four coupling members and four projecting active zones on the cam, these are disposed every 90°, for example. The same applies for the coupling return member. 
         [0055]    However, their respective dispositions may be irregular if the shape of the lid or of the pot for which it is provided so requires, provided that each coupling member is synchronized with a projecting active zone of the axial cam and a bump of the coupling return member. 
         [0056]    According to particularly convenient arrangements, when the lid comprises at least two coupling members and at least two corresponding projecting active zones on the cam, the lid comprises a single coupling return member configured to bring back each of the at least two coupling members automatically to the first position. 
         [0057]    The presence of a single coupling return member better enables the synchronization of movement of each of the coupling members to be ensured. It furthermore facilitates the production of the lid by minimizing its number of components. 
         [0058]    In a non-limiting embodiment, the at least one coupling return member comprises at least one first wave washer having at least one bump. 
         [0059]    A wave washer is for example of polymer or metal. Such a coupling return member is for example disposed between the support of the coupling plate and the return arm of each coupling member. Thus, when the lid is in opening position, the coupling return member is deformed and as a reaction tends to return the coupling members into their first position, and so return the lid into resting position. 
         [0060]    In another non-limiting embodiment, the at least one coupling return member comprises the first wave washer and at least one second wave washer, the second wave washer comprising at least one bump and at least one trough, and the first wave washer and the second wave washer being assembled to each other with the at least one bump of the first wave washer in face-to-face relationship with the at least one trough of the second wave washer such that the first wave washer and the second wave washer are positioned in opposition. 
         [0061]    The presence of several washers for example makes it possible to amplify the spring effect. 
         [0062]    Furthermore, the at least one indentation of the base neck is possibly continuous or discontinuous. 
         [0063]    For example, the base comprises at least one rib configured to keep the coupling plate of the lid oriented in relation to the base when the at least one coupling member is in first position with the lid on the base. 
         [0064]    In a case of a pot with a circular contour in which the neck is also circular, rotational indexing of the lid in relation to pot base is generally not necessary. The indentation may then be continuous and thus form a channel all around the neck. The at least one coupling member may then engage in the indentation, which is then single, at any location. 
         [0065]    However, for example if the pot has a non-circular contour and, for example, involving position indexing of the lid in relation to the base (even if the neck is circular), the indentation is then possibly discontinuous. That is to say, the neck then for example comprises at least one rib, that is to say one or more rib(s), to serve as an orientation stop. Such a rib is thus suitable to limit the rotation of the lid in relation to the base. Thus, when the lid is turned in relation to the base to open the pot, the at least one rib locks its rotation and thus forces the cap to pivot in relation to the coupling plate. The at least one rib may also facilitate the positioning of the lid in relation to the base in the case for example in which the base and the lid must comply with a certain alignment in relation to each other. On closing, after having engaged the lid on the neck in order for the coupling members to enter the at least one indentation, the user then continues the rotation of the lid until the resistance is felt that is caused by the meeting of a coupling member with a rib. On releasing the cap, this is returned into its resting position which places it in the appropriate position in relation to the base. It may be noted that in the case of a single rib, there is however only one indentation even though this is then discontinuous. It is then for example possible for several coupling members to engage in the same indentation. 
         [0066]    Thus, the base may comprise several indentations and several ribs if necessary, for example as many indentations as coupling members, the indentations being separated from each other by ribs. 
         [0067]    According to a possible exemplary embodiment, each rib is flush with a peripheral rim of the neck, such that a coupling member in second position then simultaneously has the capacity to pass over a rib and the peripheral rim to disengage from its indentation. 
         [0068]    According to another possible exemplary embodiment, each rib is set back in relation to a peripheral rim of the neck. In this case, the at least one coupling member possibly engages initially under the peripheral rim, facing a rib, then afterwards, while the lid is turned, more deeply into an indentation. 
         [0069]    According to an advantageous embodiment, the width of each of the indentations is adjusted to receive a claw of a coupling member with an amount of play reduced to the operating play. In other words, the at least one indentation has a width substantially equal to a width of the claw of the corresponding coupling member. The “width” here designates the dimension along the circumference of the neck. With such an embodiment, the lid is positioned on the base in a limited number of angular positions, for example one position or four positions considering a case in which the neck would comprise four indentations. The four positions enable the lid to be positioned to coincide with the faces of the pot if this is square for example. A single position would correspond to the case in which the pot base and the lid would have a cross-section of asymmetrical or arbitrary shape and in which a single angular position of the lid on the pot would enable coinciding shape between the pot base and the lid. Furthermore, the neck may have a circular cross-section as mentioned above or else a cross-section corresponding to the cross-section of the base. Thus, for example for a pot of square general cross-section, the neck possibly has a substantially square shape. In this case, the indentations are formed towards the middle of each of the sides of the square, for example. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0070]    The invention, according to an exemplary embodiment, will be well understood and its advantages will be clearer on reading the following detailed description, given by way of illustrative example that is in no way limiting, with reference to the accompanying drawings in which: 
           [0071]      FIG. 1  shows a perspective view of an exemplary embodiment of a cosmetics pot with a circular contour and which comprises a base and a lid; 
           [0072]      FIGS. 2 a  and 2 b    present the base of the pot of  FIG. 1  respectively in perspective and elevation view; 
           [0073]      FIG. 3  presents a perspective view of the inside of a cap of the lid of  FIG. 1  according to a first embodiment of the present invention; 
           [0074]      FIG. 4  presents a perspective view of a coupling plate of the lid of  FIG. 1  according to a first embodiment of the present invention fastened onto the base of  FIG. 1 ; 
           [0075]      FIG. 5  presents a perspective view of the inside of a cap of the lid of  FIG. 1  according to a second embodiment of the present invention; 
           [0076]      FIG. 6  presents a view in perspective and in partial cross-section of the inside of the cap of  FIG. 5 ; 
           [0077]      FIG. 7  presents a perspective view of a coupling plate of the lid of  FIG. 1  according to a second embodiment of the present invention fastened onto the base of  FIG. 1 ; 
           [0078]      FIG. 8  presents an exploded view of the plate of  FIG. 7 ; 
           [0079]      FIG. 9  presents a view in side elevation of a coupling member according to an exemplary embodiment; 
           [0080]      FIG. 10  presents a cross-section view of the pot of  FIG. 1  according to an exemplary embodiment; 
           [0081]      FIG. 11  illustrates an elevation view of the coupling plate in closing position; 
           [0082]      FIG. 12  illustrates an elevation view of the coupling plate in opening position; 
           [0083]      FIGS. 13 and 14  present in perspective view a pot of square contour and with a square neck according to another exemplary embodiment of the present invention, respectively closed and open; and 
           [0084]      FIG. 15  presents the base of  FIGS. 13 and 14  in cross-section on line XV-XV of  FIG. 14 . 
       
    
    
     DETAILED DESCRIPTION 
       [0085]    Identical parts represented in the aforementioned figures are identified by identical numerical references. 
         [0086]    The present description is mainly given with reference to a pot of round contour but it would of course be valid for a pot of square or arbitrary contour. 
         [0087]    As a matter of fact, traditionally, a cosmetic pot  1  has a contour that is round like that represented in  FIG. 1 , or often substantially square, as in  FIGS. 13 and 14 . 
         [0088]    The pot  1  comprises a base  2  and a lid  3  enabling the pot  1  to be opened or closed. 
         [0089]    The base  2  is for example represented individually in  FIGS. 2 a  and 2 b   . It comprises a container  200  and a neck  201  that surmounts the container  200 . The neck defines an opening that enables access to a product contained in the container  200 . The dimensions of the neck and of the opening are in the vicinity of the cross-section dimensions of the base. Whatever the case, the opening of the pot is sufficiently wide to enable the passage of at least one finger of one hand, that is to say that it has a transverse cross-section dimension greater than or equal to approximately 25 millimeters. 
         [0090]    The neck  201  here comprises one indentation  202  and one peripheral rim  204 . In non-limiting embodiments, an upper part of the rim  204  is rounded or beveled to create a ramp effect if a member is moved vertically against the neck. Furthermore, the lower part of the rim is also rounded, which has an effect on a linking force between a claw of a coupling member (represented for example in  FIG. 9 ) and the neck, this is described in more detail below. In this exemplary embodiment, the neck  201  has a circular section, but it may be otherwise according to the shape of the pot. The neck  201  thus possibly lacks any screw thread or screw ramp and, compared to a conventional neck, it has a lower height. For example, by way of example, a round pot according to the invention can have a height of 57 mm with a neck of 6.4 mm height, and with an indentation of 4 mm height, and 2 mm depth. For a conventional pot of the same size, the height of the neck would have been of the order of 10.3 mm. These values are however given only by way of example. 
         [0091]    The base is formed of any appropriate material, in particular glass or plastics material. It may be transparent or opaque. It may be provided to receive a mounted-on tub which contains the cosmetic product as in the case of a conventional pot. 
         [0092]    In a pot according to the invention, the lid  3  is clasped onto the base  2 , using claws. 
         [0093]    For this, the lid  3  comprises a cap  5 , represented in  FIG. 3  according to an exemplary embodiment of the present invention, and a coupling plate  4 , represented in  FIG. 4  according to an exemplary embodiment of the present invention. 
         [0094]    The cap  5  and the coupling plate  4  cooperate to enable easy opening and reliable closing of the pot  1  in use. 
         [0095]    The cap  5 , as represented for example in  FIG. 3 , comprises a body  500 . The body  500  comprises an upper face  501  (visible in  FIG. 1 ), a bottom  503 , at the back of the upper face  501 , and a contour wall  502 . 
         [0096]    The upper face  501  here constitutes an outside face, provided for example to be visible to a user when the pot  1  is closed. The upper face  501  is for example customizable, in the sense that it is configured to receive decoration, for example in the form of varnish. According to an option not shown, the upper face is formed by one or more additional layers of openwork that are superposed in order to constitute the decoration, or for instance by an additional layer of marquetry. It may be produced from plastic, wood, glass or other materials. The upper face  501  is for example planar or domed. 
         [0097]    The contour wall  502  extends from adjacent the bottom  503 . 
         [0098]    The contour wall  502  comprises an outside contour surface  500   a , which advantageously has the same shape as the base  2 , and an inside contour surface  503   a.    
         [0099]    Furthermore, the outside contour surface  500   a  is positioned at the periphery of the upper face  501 ; it is tangential to an edge of the upper face  501 . 
         [0100]    In a non-limiting embodiment, bottom  503  is substantially at a right angle to the inside contour surface  503   a  and outside contour surface  500   a . Likewise, the inside contour surface  503   a  is of circular shape, that is to say it forms a cylinder with a diameter substantially equal to the diameter of a support  400  of the coupling plate  4 , which described below, such that the cap  5  can pivot in relation to the coupling plate  4 . 
         [0101]    Independently of the shape of the outside contour surface  500   a  of the cap  5 , the inside contour surface  503   a  can be centered in relation to the cap  5 , in a particular embodiment. In other words, here, a central axis of the cylinder representing the inside contour surface  503   a  can be coextensive with a geometric center C of the cap  5  (illustrated in  FIG. 1 ). 
         [0102]    The cap  5  comprises, at its center, adjacent the bottom  503 , a cylindrical part  507 . The cylindrical part  507  serves here to define the rotation between the cap  5  and the coupling plate  4 . 
         [0103]    On the bottom  503 , around the central cylindrical part  507 , the cap  5  comprises a relief of increased thickness forming a stud  508 . The stud  508  is of annular shape here, and has a bearing surface  508   a , here planar and substantially parallel to the bottom  503  of the cap  5 . 
         [0104]    The cap  5  furthermore comprises a slot  506 . The slot  506  is configured to receive a position return member  407 , described below and which can for example be seen in  FIG. 4 . 
         [0105]    The slot  506  is hollowed into the relief of increased thickness forming the stud  508 , and is open on opposite sides of the stud  508 . 
         [0106]    Thus, adjacent the bottom  503 , the cap  5  further comprises an axial cam  504 . The axial cam  504  is formed here by a relief of increased thickness of variable height in relation to the bottom  503  of the cap  5 . The axial cam  504  is of annular shape here, centered here in relation to the geometric center C of the cap  5 , with a bearing face  504   c , which thus constitutes an active part of the cam, an outside contour surface  504   a  and an inside contour surface  504   b , for example parallel to the inside contour surface  504   a . In the present exemplary embodiment, the axial cam  504  surrounds the slot  506 . 
         [0107]    In the present exemplary embodiment, the bearing face  504   c  defines a profile forming at least one projecting active zone  505 . Here, it forms four projecting active zones  505 , one projecting active zone  505  per coupling member  410 . 
         [0108]    Here each projecting active zone  505  is defined by an angular portion of the axial cam  504  between two successive positions in which a height of the cam, for example here between the bearing face  504   c  and the bottom  503  of the cap  5 , is equal here to a distance d′ which is minimal. In other words, a projecting active zone presents a height d between the bearing face  504   a  and the bottom  503  of the cap  5  which is greater than the minimum distance d′ and which successively increases and decreases along the angular portion up to at least one position from which the height d begins to increase again. 
         [0109]    In general, and in the non-limiting illustrated embodiment, the heights of the axial cam are defined in relation to a surface serving as a bearing surface between the cap  5  and the coupling plate  4 . In the present exemplary embodiment, it is for example the bearing surface  508   a  of the stud  508 . However, as the bearing surface  508   a  is substantially parallel to the bottom  503  here, the heights of the axial cam may thus be interchangeably defined in relation to the bearing face  508   a  or the bottom  503 . 
         [0110]    In the present exemplary embodiment, the axial cam  504  has four positions at the height d between the bearing face  504   c  and the bottom  503  of the cap  5  is minimum, furthermore equal here to the height d′, which makes it possible to define a trough between two consecutive projecting active zones  505 . Between two consecutive troughs, the height d between the bearing face  504   c  and the bottom  503  of the cap  5  is greater and up to a maximum height d″ and enables a peak of a projecting active zone  505  to be defined. Each projecting active zone  505  thus has a peak which corresponds to a position where the height between the bearing face  504   c  and the bottom  503  of the cap  5  is maximum and thus has the value d″. In the non-limiting illustrated embodiment, the height d between the bearing face  504   c  and the bottom  503  of the cap  5  changes in the same way on respective opposite sides of the peak of a projecting active zone  505  until it reaches a position of distance d′ in relation to the bottom  503 , that is to say a trough. In other words, each projecting active zone  505  comprises a plane of symmetry. The axial cam  504  for example here has eight planes of symmetry. 
         [0111]    The coupling plate  4 , represented for example in  FIG. 4 , comprises a support  400  here formed by a circular plate. Whatever the outside shape of the pot  1 , the support  400 , in the illustrated embodiment, has a circular contour  400   a  in order to facilitate rotation in relation to the cap  5 . Thus, the support  400  here has the general shape of a disk. 
         [0112]    The support  400  for example comprises at least one cut-out  415 , and here four cut-outs  415  which are each adapted to receive a coupling member  410 . Furthermore, the four cut-outs  415  are positioned here at equal distances from each other along the contour  400   a.    
         [0113]    It is considered here that the support  400  comprises an upper face  401  adapted to be oriented towards the cap  5 , and a lower face  402  (visible in  FIG. 11 ), parallel to the upper face  401 , adapted to be oriented towards the base  2 . 
         [0114]    The coupling plate  4  possibly further comprises an obturator plate  419 , visible in  FIGS. 8 or 10 , secured below the support  400 , that is to say adjacent the lower face  402 . 
         [0115]    The support  400  is formed of any appropriate material, typically plastic, by molding, with the upper face  401  and the lower face  402  generally being planar. 
         [0116]    The lower face  402 , or the obturator plate  419  according to the case, is furthermore generally covered by a compressible planar seal  420 , such as a membrane, having a thickness of a few tenths of a millimeter, provided to be compressed on its perimeter between the lower face  402  and the rim  204  of the neck  201  of the base  2 . The planar seal is for example formed of any appropriate elastically compressible material, in particular of polyethylene, SEBS, elastomer or any other equivalent material. As there is very little or no relative rotation between the coupling plate and the neck, the planar seal is not acted on, or is very little acted on, in shear, and it is possible to choose a relatively adherent material which has a high coefficient of friction. 
         [0117]    Instead of such a compressible planar seal an obturator plate mounted on a suspension and adorned with a seal of reduced thickness may be envisioned, as is described for example in patent application FR 2969127. 
         [0118]    On the same side as the upper face  401 , the support  400  here comprises a central stud  403  formed in relief in relation to the upper face  401 . The central stud  403  is of generally cylindrical shape, such that an outside contour surface  403   a  of the central stud  403  is substantially parallel to the contour  400   a  of the support  400 . In other words, the central stud  403  is centered on the upper face  401 of the support  400 . 
         [0119]    The central stud  403  here comprises a slot  404  and, furthermore, a bore  408  such that the central stud  403  is thus of annular shape. The slot  404  is of constant width here and passes through the central stud  403  from the bore  408  to reach the outside contour surface  403   a . The slot  404  is provided to receive the position return member  407  serving to bring the cap  5  back into resting position in relation to the coupling plate  4  when the cap  5  is turned in relation to the coupling plate  4 . 
         [0120]    The position return member  407  of the exemplary embodiment of  FIG. 4  has a first end  407   a  inserted into the slot  404  of the coupling plate  4  and a second end  407   b  inserted into the slot  506  of the cap  5  once the cap  5  and the coupling plate  4  have been assembled. Furthermore, the position return member  407  is wound helicoidally here, as a helical spring, around a central pin with its first end  407   a  and its second end  407   b  projecting and straight in order to be able to cooperate with the slots  404 ,  506 . 
         [0121]    Each end  407   a ,  407   b  of the position return member  407  is for example inserted into the corresponding slot  404 ,  506  which makes it possible to avoid recourse to other fastening or assembly means for example such as adhesive. Thus, it is as if the position return member  407  is embedded in the central stud  407  and also embedded in the stud  508 , that is to say, more generally in the coupling plate  4  and also in the cap  5 . 
         [0122]    Adjacent the upper face  401 , the coupling plate  4  further comprises a coupling return member  416 . 
         [0123]    The coupling return member  416  serves to bring a coupling member  410  into first position by acting as a spring as is detailed below. For this, according to this particular embodiment, it is elastically deformable. It comprises for example at least one bump. 
         [0124]    The coupling return member  416  is disposed between the upper face  401  of the support  400  on which it rests and at least one arm  412  of a coupling member  410 . It is furthermore disposed here around the central stud  403 . 
         [0125]    In this non-limiting embodiment, the coupling return member  416  is composed of a single part in order to better ensure a synchronized movement of the coupling members  410  if the lid  3  comprises at least two of them. However, the coupling member  416  could comprise several independent spring members for each of the coupling members  410  without preventing their synchronized movements. 
         [0126]    The coupling return member  416  is for example here a washer, and more particularly a wave washer with at least one bump  417 . In the case of a wave washer being used as coupling return member  416 , the wave washer advantageously comprises the same number of bumps  417  as the lid  3  comprises coupling members  410  and, in this non-limiting embodiment, with identical bumps  417  to promote the synchronized movements of the coupling members  410 . 
         [0127]    As  FIG. 4  shows, as the pot  1  of the present exemplary embodiment comprises four coupling members  410 , the wave washer here comprises four bumps  417 . 
         [0128]    By convention, two consecutive bumps  417  define a trough  418  between them. 
         [0129]    In the present exemplary embodiment, the wave washer  416  has an inside diameter substantially equal to the central stud  403  to limit, or even eliminate lateral translation movements of the wave washer, that is to say horizontal translations, in a plane parallel to the upper face  401 . In a vertical direction, translations of the coupling return member, whatever they be, are limited because it is held between the upper face  401  and at least one coupling member  410 . Lastly, a rotational movement of the coupling return member  416  around the vertical axis, that is to say around the central stud  403  in this case, may be limited by any means, for example such as a spot of adhesive, or a rivet, or for instance a local deformation of the coupling return member  416  and/or of the upper face  401 , and/or for instance a local deformation of the coupling return member  416  at the location of the peak of a bump  417  such that an arm  412  maintains its orientation. 
         [0130]    According to another exemplary embodiment represented for example in  FIGS. 7 and 8 , the coupling return member  416  comprises two wave washers comprising the same number of bumps as each other, and therefore the same number of troughs, and are disposed one on the other such that the trough of a first wave washer faces a boss of the second wave washer. Each arm  412  of a coupling member  410  is then in contact with a bump of a first wave washer, which would be an upper wave washer, that is to say placed nearest the cap  5 , and opposite a trough of a second wave washer, which would be a lower wave washer, that is to say thus in contact with the upper face  401  of the support  400 . Such a superposition of wave washers thus enables the spring effect to be amplified for example. 
         [0131]    The same would apply if the coupling return member  416  comprises more than two wave washers. 
         [0132]    As mentioned above, to grasp the lid  3  of the base  2 , the coupling plate  4  comprises at least one coupling member  410 . 
         [0133]    In the present exemplary embodiment, it comprises four identical coupling members  410 , positioned at equal distances from each other, that is to say every 90°, at the periphery of the support  400 , and in the cut-outs  415 , since the support  400  has these. These cut-outs  415  are thus configured to hold the coupling members  410  in position around the support  400 . 
         [0134]    Each coupling member  410  is rotatable in relation to the support  400  in a direction at a right angle to the axis, referred to as vertical axis, passing through a center of the support  400 . 
         [0135]    Each coupling member  410  comprises a claw  411  and a return arm  412 . In the present exemplary embodiment, the claw  411  and the return arm  412  extend from a same face of a dorsal wall  413  of the coupling member  410  while being oriented towards the center of the support  400 . In other words, each return arm  412  extends along a radius of the support  400  for example. The coupling member  410  is thus C-shaped, surrounding an edge of the support  400 . The return arm  412  here for example is finger-shaped, with a free end and an end linked to the dorsal wall  413 . 
         [0136]    The claw  411  is configured to grasp the neck  201  of the base  2  by engaging in the indentation  202  under the rim  204 . The claw  411  here has an edge shape of a hook, curved towards the center of the support  400 . In the present exemplary embodiment, the claw  411  passes under a level of the lower face  402  of the support  400 , as can be seen in  FIGS. 10 to 12 . 
         [0137]    As  FIG. 9  shows, the claw  411  has a very rounded shape, for example matching the shape of the indentation formed at the periphery of the neck. An important effect of such a shape is that a pulling force, for example induced by a user to open the pot without turning it or by an accidental application of force, indices a tightening effect of the claw in the indentation. 
         [0138]    That being said, the rounded shape of the claw  411  facilitates the passing of the rim  204  on its engagement in the indentation  202  when, for example, the lid is clipped on to close the pot. 
         [0139]    Each coupling member  410 , comprising a claw  411 , a return arm  412  and a dorsal wall  413 , can be formed as one piece, for example by molding of plastic material. Or at least, the claw  411  and the return arm  412  are assembled such that when the return arm  412  lowers, the claw  411  disengages from the indentation  202 . 
         [0140]    The return arm  412  and the dorsal wall  413  define for example a guide  414  between them to form a hinge, a pivot link with the support. 
         [0141]    The guide  414  for example comprises a hollow tube in which passes a pin  414   b  held by at least one pillar  414   c , which pillar  414   c  is fastened to the support  400 . In the present exemplary embodiment, the coupling plate  4  comprises two pillars  414   c  for each coupling member  410 . 
         [0142]    Other embodiments for tilting assembly of the coupling member to the support may of course be envisioned. 
         [0143]    For example, the pin  414   b  and the hollow tube  414   a  are free to rotate in relation to each other in order to allow pivoting, tilting, of the coupling member  410  in relation to the support  400 . Or according to an alternative, the pin  414   b  and the hollow tube  414   a  are fastened in relation to each other and the pin  414   b  is free to rotate, around a shaft of the pin  414   b  which also forms the shaft of the guide  414 , in relation to the at least one pillar  414   c.    
         [0144]    More specifically, to state thus that the return arm  412  lowers means that its free end lowers, that is to say approaches the upper face  401  of the support  400 . As a matter of fact, by itself, each coupling member  410  can be made to be only movable to rotate around the shaft of the guide  414 , without considering the variety of play from assembly which there may be. 
         [0145]    Each coupling member  410  is thus configured to take at least a first position, for example when the lid  3  is in resting position, and a second position, for example when the lid  3  is in opening position, the second position being a position in which the at least one coupling member  410  is pivoted, tilted, in relation to the first position. 
         [0146]    More particularly, the first position is for example a position in which the return arm  412  is in a first position referred to as high position, and in which the claw  411  is engaged in the indentation  202 , and the second position is for example a position in which the return arm  412  is in a second position referred to as low position, and in which the claw  411  is disengaged from the indentation  202 . The coupling member  410  thus passes from one position to the other by pivoting around the guide shaft  414 . 
         [0147]    When the support  400 , at least one coupling member  410  and at least one coupling return member  416  are assembled, the return arm  412  of the at least one coupling member  410  bears on part of the coupling return member  416 , and an elastic deformation of the coupling return member leads to lowering of the return arm  412  enabling the claw  411  to be disengaged from the indentation  202  of the neck  201  of the base  2 . 
         [0148]    In the case of the present exemplary embodiment in which the coupling return member  416  is a wave washer, the return arm  412  of the at least one coupling member  410  bears on a bump of the coupling return member  416 . The elastic deformation of the coupling member  416  for example corresponds to compression of the wave washer, enabling the return arm  412  to be lowered. 
         [0149]    Moreover, a force induced by the coupling return member  416  under the return arm  412  tends to raise the return arm  412 . However, the latter is limited in this respect because the claw comes to bear on the bottom of the indentation or that the dorsal wall comes to bear against the contour  400   a  of the support  400 , in a cut-out  415 . To that end, it is advantageous for the shaft of the guide to be optionally spaced away from the contour  400   a , towards the center. In the present case, the pillars  414   c  are away from the contour  400   a  and the dorsal wall  413  is curved here towards the guide  414 . 
         [0150]      FIGS. 5 and 6  and then  FIGS. 7 and 8  present another exemplary embodiment of the cap  5  of the plate  4 . 
         [0151]    The cap  5  of  FIGS. 5 and 6  differs from the preceding exemplary embodiment in that it has no stud  508 , and in that the cylindrical part  507  comprises an indentation, or slot,  506  configured for insertion therein of a blade spring there serving as position return member  407 . Correspondingly, the plate  4  of  FIGS. 7 and 8  differs in that the slot  404  of the central stud  403  is formed along a radius of the support to receive an end of the blade spring  407  in continuity with the indentation  506  of the cylindrical part  507  of  FIGS. 5 and 6 . In this exemplary embodiment, the blade spring  407  is flexed when the cap  5  is pivoted in relation to the plate  4 . 
         [0152]    Furthermore, in this exemplary embodiment, the coupling return member  416  comprises two wave washers. 
         [0153]    Thus, when the cap  5  and the coupling plate  4  are assembled, the lid  3  is then configured to take a “resting” position represented for example in  FIGS. 10 and 11 , and an “opening” position represented for example in  FIG. 12 . 
         [0154]    Thus, when the cap  5  and the coupling plate  4  are assembled, the contour  400   a  of the support  400  of the coupling plate  4  is face-to-face with the inside contour surface  503   a  of the cap  5  and the bearing face  504   c  of the cam  504  is in contact with at least the coupling return member  416 . The position return member  407  is simultaneously inserted into the slot  506  of the cap  5  and the slot  404  of the plate  4  to perform its role here. Furthermore, the bearing surface  508   a  of the stud  508  of the cap  5  then bears on the central stud  403  of the plate  4  if the cap has one (this is not the case in  FIG. 10 ). 
         [0155]    The assembly between the cap  5  and the coupling plate  4  is achieved by any appropriate means, for example by a circlips that retains the coupling plate  4  inside the cap  5 , or for instance by snap engagement of the coupling plate  4  in the cap  5 . Another possibility which may be envisioned is also that the cap  5  be screwed to the plate  4 , as  FIG. 10  shows. 
         [0156]    In resting position, the at least one claw  411  is engaged in the indentation  202 . The cap  5  and the coupling plate  4  are oriented in relation to each other such that at least one projecting active zone  505  of the axial cam  504  is arranged in relation to the at least one coupling return member  416  such that the return arm  412  of each coupling member  410  is in high position. In other words, the at least one projecting active zone  505  of the axial cam  504  does not cause deformation of the at least one coupling return member  416 , or at least insufficient deformation to move a claw  411  away from the indentation  202 . The coupling return member  416  as well as the position return member  407 , serving to bring the cap  5  automatically back in relation to the coupling plate  4  into a resting position orientation, are then in a natural, neutral, configuration, of minimum deformation. In the case represented in  FIG. 10  in which the coupling return member  416  comprises two wave washers, each peak of projecting active zone  505  of the axial cam  504  is then face-to-face with a trough  418  of the upper wave washer and opposite a bump of the lower washer. In  FIG. 4 , on which the cap is not shown, the coupling return member  416  comprises a single wave washer, each peak of a projecting active zone  505  of the axial cam  504  would then be face-to-face with a trough  418  of the wave washer. 
         [0157]    Opening the pot  1  consists in tuning the lid  3  in relation to the base  2 . Pivoting the lid  3  here engenders pivoting of the cap  5  in relation to the coupling plate  4 , which results in tilting each coupling member  410  and thus in clearing each claw  411  from the indentation  202 , here by moving each claw  411  away from the neck  201 . As soon as each return arm  412  has been lowered a predetermined amount, corresponding to a predetermined angle of rotation of the cap  5  in relation to the coupling plate  4 , each claw can then pass around the rim  204 . 
         [0158]    When the rotation takes place, the at least one projecting active zone  505  bears progressively on the coupling return member  416 . This induces compression of the coupling return member  416  which drives lowering of the return arm  412  which attains the low position, and thus tilting of the corresponding coupling member  410 , and thus drives a moving away of the claw  411  which disengages from the indentation  202  of the neck  201  of the base  2 . 
         [0159]    Here, each projecting active zone  505  extends from a trough  418  along a bump  417  of a wave washer. Starting from a certain predetermined compression, which may be when a peak of a projecting active zone  505  reaches a peak of a bump  417  of the wave washer or before then, the tilting of an coupling member  410  is sufficient to disengage the corresponding claw  411  from the indentation  202 , as is for example represented in  FIG. 12 . 
         [0160]    The predetermined compression corresponds to a predetermined angle of rotation between the cap  5  and the coupling plate  4  and to a predetermined drop of the return arm  412 . In the present exemplary embodiments, a peak of a projecting active zone  505  reaches a peak of a bump  417  of the wave washer for a rotation of the cap  5  through approximately 45° in relation to the resting position. Thus, for a predetermined compression which may be less, the angle of rotation would be comprised between 0° and 45° for example. Thus, the predetermined compression may be fixed so as to have to apply a rotation of 40°, or even 30°, or for instance 15° to the cap  5  in relation to the coupling plate  4  for example. The rotation of the cap  5  in relation to the plate  4  is all the more facilitated by the adherence of the seal on the neck of the base  2  which contributes to maintaining the plate  4  oriented on the base  2 . Each coupling member  410  then has a tilting movement, that is to say that the free end of the return arm  412  is lowered, by a corresponding amount, and the claw  411  moves away from the indentation  202 . 
         [0161]    In parallel, the position return member  407  is deformed because it is held both in the slot  404  of the coupling plate  4  and the slot  506  of the cap  5 . 
         [0162]    Thus, to attain this opening position, the coupling plate  4  can be braked, or even retained, rotationally, or else by mere friction or adherence in relation to the neck  201 . 
         [0163]    This may however be reinforced by one of the claws  411  being in abutment on a rib  205  of the indentation  202 , which can be seen for example in  FIG. 14 . 
         [0164]    By convenience where provided, the rib can be of a thickness substantially equal to a depth of the indentation  202  in relation to the rim  204  such that a claw  411  is incapable of passing over the rib so long as it is unable to disengage from under the rim  204 . 
         [0165]    For example, as represented in  FIG. 14 , the base  2  comprises four ribs such that each claw  411  of the lid  3  described above bears against a rib whatever the direction of rotation of the lid. In this last configuration, two consecutive ribs are for example spaced away from each other by a distance equal to a width of a claw in order for the latter to be angularly locked in each direction. 
         [0166]    According to another example, the base comprises at least one rib which extends along a circumference of the neck over a distance equal to a spacing defined between two coupling members or two sides of a same coupling member such that the coupling plate is then locked in orientation in each direction of rotation. In a case in which the lid only comprises a single claw  411 , the indentation  202  could for example be defined on the neck  201  by a recess in which the claw  411  engages when the lid is in resting position. In another case in which the lid comprises at least two claws  411 , at least one rib extends for example between two consecutive claws  411 . It is of course possible to combine these different configurations. 
         [0167]    In opening position, as illustrated by  FIG. 12 , each coupling member  410  has then reached a second position which is tilted in relation to the first position, and the coupling return member  416  as well as the position return member  407  tend to bring the lid  3  automatically back to resting position. Indeed, the position return member  407  seeks to return to the natural position, inducing a contra-rotation to that applied by a user to the lid  3 , and moreover the coupling return member  416  seeks to raise the return arm  412 , to act against the compression applied to it, which will also tend to push back the corresponding projecting active zone  505 . 
         [0168]    In general, the position return member  407  furthermore serves to avoid turning the cap  5  in relation to the coupling plate  4  beyond a relative angle in which each peak of projecting active zone  505  would extend beyond the peak of a corresponding bump  417  of the coupling return member  416 , which would result  8  again raising each return arm  412  and would make opening a pot  1  more difficult. 
         [0169]    A pot  1  such as described above is moreover easily closed by clipping the lid  3  on the base  2  for example. 
         [0170]    Such a lid  3  is thus easily adaptable to any base  2 , provided to contain a cosmetic product, comprising a neck  201  of corresponding diameter with at least one peripheral indentation  202 . 
         [0171]    By way of illustration,  FIGS. 13 to 15  show another exemplary embodiment of a pot  1  having a square contour and an opening which is also square. 
         [0172]      FIG. 14  in particular shows that the neck is provided with indentation  202 , here formed in the middle of each side of the neck, two consecutive indentations being separated here by a rib  205 , as described above. 
         [0173]    A lid as described above is thus adaptable in the same way as for a base with a round neck to a base with a square neck. 
         [0174]    A square neck or round neck may thus comprise one or more ribs or none. Moreover in the case of a pot of square contour, if the neck has no rib, the contour matching between the lid and the base may of course be provided by any other means. 
         [0175]    Naturally, the present invention is limited neither to the preceding description nor to the appended drawings, but encompasses any variant form within the capability of the person skilled in the art.