Abstract:
A closure and dispensing device intended to be fitted to a container. The device includes a body which can be mounted on the container, with the body including a dispensing aperture in communication with an opening by the container. A lid is stable in the open position, and capable of selectively closing off the dispensing aperture, with the lid being pivotable relative to the body about an axis of a hinge. At least one resiliently deformable strip connects the lid to the body, and the lid includes two ends on an axis perpendicular to the hinge axis. The hinge axis is preferably located relative to the ends so that opening of the lid can occur as a result of pressure exerted on a portion of the lid situated between the hinge axis and the opposite end of the lid. The opposite end of the lid preferably includes a portion which at least partially closes off the dispensing aperture.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS  
       [0001]     This document claims priority to French Application Number 03 50581, filed Sep. 22, 2003 and U.S. Provisional Application No. 60/506,728, filed Sep. 30, 2003, the entire contents of which are hereby incorporated by reference. 
     
    
     FIELD OF THE INVENTION  
       [0002]     The invention relates to closure and/or dispensing devices. More particularly the invention relates to containers fitted with a dispensing cap. Preferably the dispensing cap includes a spring-effect hinge.  
       BACKGROUND OF THE INVENTION  
       [0003]     Discussion of Background  
         [0004]     Dispensing caps are extensively described in the prior art, and generally include a body capable of being mounted around a neck delineating an opening in the container. The cap further includes a lid connected to the body by means of a hinge. The body includes a dispensing aperture which is closed off by the lid when the cap is in the closed position. In the open position, the lid at least partially exposes the dispensing aperture to facilitate the withdrawal of product from the container.  
         [0005]     Generally, in order to move from the closed position to the open position, it is necessary to hold the container in one hand while the other hand exerts pressure on a protuberant part of the lid. Preferably, this protuberant part is defined on a side diametrically opposite the hinge.  
         [0006]     In the case where the hinge has a spring effect, the simple action of raising the lid relative to the body induces completion of the opening movement. The spring-effect hinge brings the lid to the open position provided that it is brought to an unstable balance position and a very slight movement away from this unstable position towards the open position is induced.  
         [0007]     Dispensing caps of this kind are known, for example, from the teachings of U.S. Pat. No. 4,813,560 and U.S. Pat. No. 3,741,447.  
         [0008]     Other dispensing caps are known, for example as in U.S. Pat. No. 4,124,151 and U.S. Pat. No. 4,911,337, in which the spring-effect hinge is obtained by engaging a ball joint on the lid into a boss on the body. The ball joint engaged in the boss forms the hinge axis about which the lid is able to pivot relative to the body. The spring effect is obtained from a resilient portion connecting an edge of the lid to an edge of the body. This resilient portion extends on a side of the hinge opposite that at which the lid is defined. In this case also, in order to induce the passage from the closed position to the open position of the lid, pressure must be exerted on a protuberant part of the lid, with the protuberant part being diametrically opposite the resilient portion.  
         [0009]     Another type of dispensing cap is disclosed in FR 1,161,611. With this arrangement, the lid also includes a protuberant part and a hinge having a spring means. In this case, the protuberant part is defined on a side of the hinge opposite that on which the lid is defined. In order to expose the dispensing aperture, pressure is exerted on the outer surface of this protuberant part so as to create leverage.  
         [0010]     In the embodiment taught by FR 1,161,611, the lid is capable of reverting resiliently to the closed position, but it presents a major drawback in that the open position is only obtained as long as pressure is being exerted on the protuberant part. The spring means exerts a permanent force tending to return the lid to the closed position. This spring means has no reversible unstable balance position enabling it to pass from a first stable position, for example closed, to a second stable position, for example open. In effect the spring is included within the thickness of the lid, and stiffens it. The partial opening provided by the lid is also dependent on the plastic properties of the lid inside which the spring means is disposed.  
         [0011]     A container fitted with a cap according to FR 1,161,611 is not easy to manipulate. In effect, even though it allows the container to be held and opened with one hand. When the product is dispensed by orienting the dispensing aperture downward, with at least one finger of the hand having to hold the lid open, the hand is then forced to assume a twisted or awkward position. Moreover, with the hand grasping the container it is difficult or impossible to correctly adjust the inclination imparted to the container to a desired position given the complex position which it is compelled to assume.  
         [0012]     Dispensing caps known in the prior art pose a number of problems. Those which can be held in the open position when the product is being dispensed can require the use of two hands in order to accomplish opening or closure of the dispensing caps. And those dispensing caps which can be opened and held with one hand pose problems in that opening can require pressure to be maintained on part of the lid.  
       SUMMARY OF THE INVENTION  
       [0013]     There is a need for new and improved dispensing caps, preferably in which the lid has small or minimal dimensions whether in the open or closed position.  
         [0014]     According to one aspect of the invention, a container having a dispensing cap is provided. In a closed position, this type of cap serves to close off an opening in the container on which it is mounted. In an open position the cap facilitates dispensing of the product held in the container via a dispensing aperture that is in fluid communication with the contents of the container. A spring-effect hinge serves to ease the passage from the closed position to the open position.  
         [0015]     One object of the invention is to wholly or partially resolve the problems referred to above. To this end, the dispensing cap according to the invention, when mounted on a container, can be moved from the open position to the closed position and vice versa using the same hand that is holding the container. In addition, both the opening and closing actions can be obtained by exerting simple pressure on an upper bearing surface of the lid of the dispensing cap.  
         [0016]     In accordance with one feature of the invention, the lid can be mounted rotatably relative to the body of the cap about an axis forming a hinge. In accordance with one example, the lid includes a bearing surface on each side of the axis forming the hinge. A first bearing surface serves to induce the opening action, and a second serves for the closing action. In addition, the hinge is preferably of the spring effect type so as to facilitate completion of the opening or closing movements.  
         [0017]     According to an object of the invention, a closure and/or dispensing device is provided which can be fitted to a container. In accordance with one example, the device includes a body which is capable of being mounted on the container, and which presents a dispensing aperture in communication with an opening delineated by the container. A lid is capable of selectively closing off the dispensing aperture, with the lid being pivoted relative to the body about a hinge axis. In addition, the lid is capable, in the absence of any external force, of remaining in the open position. At least one resiliently deformable strip connects the lid to the body.  
         [0018]     In accordance with a preferred example, the lid includes two ends on an axis perpendicular to the hinge axis. With this example, the hinge axis is located relative to the ends so that opening of the lid can occur as a result of pressure exerted on a portion of the lid situated between the hinge axis and a second end of the lid. The second end is opposite a first end which at least partially delineates a portion of the lid which closes off the dispensing aperture.  
         [0019]     Another object of the invention is to provide a closure and/or dispensing device which can be mounted at the level of an opening in a container, with an example of the device including a body capable of being mounted around the opening, and with this body including a dispensing aperture in fluid communication with the container. A cover is pivotable relative to the body by a spring-effect hinge, with the lid incorporating two portions on each side of the hinge axis. A first portion of the lid is arranged to close off the dispensing aperture in the closed position. A second portion of the lid forms a bearing surface to enable the lid to be moved from the closed position to an open position. In addition, at least one resiliently deformable strip connects the lid to the body. Further, the second portion of the lid is at least partially accommodated in a cavity of the body when the lid is in the open position.  
         [0020]     According to one example, a hinge is generally composed of two parts connected by a common axis about which at least one of the parts is able to turn. In a preferred embodiment, by way of example, the hinge is of the film-hinge type. When the hinge is defined by a thin film connecting the two parts, the axis about which the parts are able to turn corresponds to a thinner zone of the film extending linearly.  
         [0021]     The term “spring effect pivot” refers to a pivot incorporating a resilient connecting strip configured so to provide an unstable position and/or to be subjected to maximum resilient strain (either in extension or in compression) in an intermediate position between the open position and the closed position. In accordance with an illustrated example, a resilient strip is attached to each of the parts so that the distance between the two points of attachment is variable when passing from the open position to the closed position. The strip has inherent resilience and can present an unstable balance position between the two open and closed positions.  
         [0022]     By way of example, the resilient strip can have a length such that between the two open and closed positions there exists a position at which the extension or compression strain is at its maximum, which causes this intermediate position between the open position and the closed position to be unstable.  
         [0023]     Advantageously, the lid can form a lever such that a force exerted on one of the two portions of the lid causes the two portions to pivot about the hinge axis. The term lever is understood to mean a unitary body formed in this instance by the lid, with the lever being mobile about an axis, in this instance about the hinge axis. The term leverage is understood to mean a distance between the point of application of a force and an axis forming a hinge of rotation.  
         [0024]     Preferably, in the closed position, the spring-effect hinge is concealed by the lid, for example, between the lid and the body. The lid includes two portions defined on either side of this hinge. Each of the two portions can participate in concealing the hinge.  
         [0025]     According to an example or particular embodiment, the spring-effect hinge can include a first part integral with the body, a second part integral with the lid, and the resilient strip connects these two parts.  
         [0026]     In accordance with an example where the hinge is concealed under the lid in the closed position, the first part can then be attached to the rim of a cavity formed in the body, and the second part can be connected to the lower surface of the lid. In this case, the resilient strip can also be concealed by the lid in the closed position. Preferably, the second part is connected to the lower surface of the second portion of the lid, and the device is arranged to cause this second portion to at least partially enter the cavity.  
         [0027]     The merit of having the hinge concealed under the lid, in the closed position, is to protect the hinge against soiling or any impact, for example, during storage of this type of device.  
         [0028]     Advantageously, according to a preferred feature, this second part can be attached some distance from the ends of the upper surface of the lid, and the first part can be attached to an area of the rim of the cavity as close as possible to the dispensing aperture. In this case, the hinge can advantageously extend on a line separating the dispensing aperture on one hand and access to the cavity on the other.  
         [0029]     Preferably, a hinge axis is capable of allowing elastic deformation as it passes from the closed position to the open position, notably under the effect of pressure exerted on the bearing surface. This elastic deformation causes the second part to move relative to the first part. By way of example, in the case where the hinge is of the film-hinge type, the zone forming the hinge axis can deform elastically so as be slightly lower than at rest.  
         [0030]     As a variant, and/or in an additional manner, under the effect of the pressure exerted on the bearing surface, an upper surface of the lid can also be capable of compressing elastically towards the seating of the body.  
         [0031]     In these two particular cases, and in accordance with an advantageous feature, the lower surface of the lid can incorporate a brace, and this brace then bears on the body and is capable of forming locally in proximity to the seating a new axis of rotation, or temporary hinge axis, during the movement from the closed position to the open position. This temporary hinge axis is preferably only formed during the period of time when pressure is exerted on the bearing surface, and when the hinge axis is capable of moving downward during the movement from the closed position to the open position. The brace is advantageous in that it makes it possible to momentarily modify the different leverages.  
         [0032]     Preferably, the temporary hinge axis is formed between the dispensing aperture and the hinge axis. Thus, with a normal pressure force exerted on the bearing surface of the second portion, a greater force can initially be obtained at the first portion closing off the dispensing aperture. This arrangement can be advantageous when it is necessary to disengage a stud from the lower surface of the first portion of the lid of the dispensing aperture.  
         [0033]     According to another or alternate advantageous aspect of the invention, the spring-effect hinge can be in a stable position in the open and closed positions, and pass through an unstable balance position between these two positions.  
         [0034]     Again advantageously, in the open position, an angle defined between the body and the lid is preferably greater than 90°, and is also preferably not greater than 130°.  
         [0035]     According to an advantageous aspect of the invention, passage from the closed position to the open position can be induced by a pressure exerted on the bearing surface. For example, the pressure can be exerted in at least one direction orthogonal to this bearing surface.  
         [0036]     Further, by way of example, the second portion can have a length, along an axis orthogonal to the hinge axis, shorter than the length of the first portion relative to the same axis.  
         [0037]     Advantageously, a lower face of the first portion can include a stud capable of engaging in a leaktight manner into the outlet aperture.  
         [0038]     According to another advantageous feature, the device can include an arrangement to lock the lid in the closed position so as to prevent the lid from moving from the closed position to the open position, with this locking arrangement being capable of cooperating with a rim of the cavity so as to prevent rotation of the second portion relative to the hinge axis. The merit of such a locking arrangement is to avoid inadvertent and unwanted opening of the lid, for example, as a result of impact or dropping which might occur with a container fitted with such a device. This locking arrangement can increase the length of the lid on an axis orthogonal to the hinge axis, such that at rest, in the closed position, the locking arrangement is close to or bearing against the rim.  
         [0039]     In accordance with an illustrated example, the position of the locking arrangement is maintained under the effect of a resilient tab which holds it in the at-rest position. To facilitate the passage from the closed position to the open position, it is first necessary to exert pressure on this locking arrangement, thereby placing the resilient tab under strain. When the tab is under strain, the locking arrangement is preferably displaced axially along an axis orthogonal to the hinge. At the same time as this pressure is exerted in a direction at least parallel to the bearing surface, the user preferably applies pressure in a direction at least orthogonal to the bearing surface of the lid, to induce the opening movement.  
         [0040]     According to a first embodiment or example, the locking of the closed position can be provided by a locking arrangement fitted to the lid. In this case, alternatively, the resilient tab can also be placed under strain in its locking position, and the locking arrangement then bears against an inner surface of the rim of the cavity.  
         [0041]     According to a second embodiment or example, the locking arrangement can be formed as a single piece with at least part of the lid.  
         [0042]     Preferably, pressure exerted on an outer surface of the locking arrangement, in at least one direction parallel to the bearing surface, facilitates compression of the resilient tab, and thus enables the movement from the closed position to the open position.  
         [0043]     Advantageously, the device is preferably made in one piece by molding of a thermoplastic material, preferably selected from the polyolefins group. For example, the device can be molded of polypropylene.  
         [0044]     In accordance with another object of the invention, a container is provided which is fitted with a closure and/or dispensing device as described herein. 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0045]     The invention will become further apparent from the following detailed description, particularly when considered in conjunction with the drawings in which:  
         [0046]      FIG. 1   a  is a profile or perspective view of a container fitted with a device according to the invention in the closed position;  
         [0047]      FIG. 1   b  is a perspective view of a container fitted with a device according to the invention in the open position;  
         [0048]      FIG. 2   a  is a lengthwise sectional view of a device according to the invention in the closed position;  
         [0049]      FIGS. 2   b  and  2   c  are two lengthwise sectional views of a device according to the invention in the opening position and in the open position;  
         [0050]      FIG. 2   d  is a lengthwise sectional view of a device according to the invention in the molding or molded position;  
         [0051]      FIG. 3  is a profile or perspective view of an alternative embodiment of a device according to the invention in the closed position;  
         [0052]      FIG. 4  is a lengthwise sectional view of a device according to  FIG. 3 ;  
         [0053]      FIGS. 5   a ,  5   b  and  5   c  are profile or perspective views of different embodiments of a locking arrangement capable of being mounted on a device according to the invention;  
         [0054]      FIGS. 6   a  and  6   b  are lengthwise sectional view of a device according to the invention in the unlocking position and in the opening position;  
         [0055]      FIG. 7   a  is a lengthwise sectional view of a device according to a second embodiment of the invention in the molded or molding position;  
         [0056]      FIG. 7   b  is a lengthwise sectional view of a device according to a second embodiment of the invention in the closed position;  
         [0057]      FIGS. 7   c  and  7   d  are two lengthwise sectional views of a device according to a second embodiment of the invention in the opening position and open position respectively. 
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0058]      FIG. 1   a  illustrates a closure device  1  mounted on a container  2 . The container  2  has, for example, an elongated shape along an axis X. The device includes an opening, not visible in  FIG. 1   a , preferably defined orthogonally to this axis X. The device  1  principally includes a body  3  mounted on the container  2 , and a lid  4 . The body  3  is preferably mounted permanently on the container  2 , for example by cooperation between a projection on a inner circumference of the body  3  and a counterpart projection on an outer circumference of the container  2 .  
         [0059]     The lid  4  is movable relative to the body  3 , as can be seen in  FIG. 1   b  where the lid  4  is in the open position, whereas in  FIG. 1   a  the lid  4  is in the closed position. In the open position, a dispensing aperture  5  on the body is maintained visible and makes possible the dispensing of the product held in the container  2 . In effect, the body  3  is mounted on the container  2  so that the dispensing aperture  5  is in fluid communication with the opening in the container  2 , with the opening being concealed or covered by the body  3 .  
         [0060]     Preferably, this dispensing aperture  5  is defined at the level of a surface or seating  6  on the body  3 , with the seating  6  defining a surface substantially orthogonal to the axis X.  
         [0061]     The lid  4  is pivoted about a hinge  7  of axis  8 , with the axis  8  of this hinge  7  being defined parallel to the surface of the seating  6 , and orthogonally to the axis X. In the open position, the lid  4  defines an angle with the surface of the seating  6  preferably greater than 90°. More preferably, the opening angle is on the order of 130° or less. The seating  6  or body  3  incorporates a cavity  9 , inside of which at least a portion of the lid  4  is disposed when it is in the open position.  
         [0062]     With the axis  8  of the hinge  7  being defined at some distance from the edges or ends of the lid  4 , the lid can therefore be defined by or to include two portions each disposed on either side of the axis  8 . For example, a first portion  10  extends, in the closed position, above the dispensing aperture  5 , while a second portion  11  serves as a tilt or bearing surface in order to move the first portion  10  from the closed position to the open position. The second portion  11  corresponds to the part of the lid  4  which tilts such that it is at least partially inside the cavity  9  in the open position.  
         [0063]     As shown in  FIG. 2   a  of the illustrated example, the container  2  preferably includes a neck  12  at which is defined the opening  13  in the container  2 . The neck  12  forms a local restriction on the outside diameter of the container  2 . The body  3  is preferably mounted, for example by force, on a part of the container  2  wider than the diameter of the neck  12 . By way of example, in order to be held on the container  2 , the body  3  incorporates a channel  14  in communication with the dispensing aperture  5 , with this channel  14  being inserted inside the neck  12 . Fluid communication is thus provided between the container  2  and the dispensing aperture  5 . The channel  14  is mounted in a leaktight manner in the neck  12  to avoid leaks when the device is presented “upside down”, i.e. with the dispensing aperture  5  oriented towards the ground.  
         [0064]     In the embodiment shown in  FIG. 2   a , the lid  4  includes a stud  15  capable of engaging with the dispensing aperture  5  to thereby create a leaktight closure. Preferably, the aperture  5  has a circular cross-section and the stud has a counterpart cylindrical shape. The stud  15  moves inside the aperture  5  over a limited height. In effect, the lid is rotatable about the hinge  7  and in describing such a rotational movement, the stud  15  must be capable of emerging readily from this aperture  5  while at the same time ensuring effective leaktightness in the closed position.  
         [0065]     The hinge  7  is preferably disposed at a lower surface  19  opposite the upper surface  16  of the lid  4 . It is thus protected when the device is in the closed position. In this example, the hinge  7  is of the film-hinge type and includes a first part  17  integral with or coupled to the seating  6 , and a second part  18  integral with or coupled to the lid  4 . In the illustrated example, the axis  8  of the hinge  7  is formed by a plastic film between the first part  17  and the second part  18 . The hinge  7  is preferably obtained, for example, by molding of plastic.  
         [0066]     More particularly, the second part  18  is attached to the lower surface  19  of the lid  4 . More particularly again, in the illustrated example, the second part  18  is attached to an area of this lower surface  19  disposed at the level of the second portion  11 . Thus, when the lid  4  is moved to the open position, the second part  18  is caused to move in rotation relative to the first part  17 .  
         [0067]     In particular, the stud  15  is defined at the level of the lower surface  19 , on a side of the lid  4  opposite the area to which the second part  18  is attached. The first part  17  is preferably attached to an area  21  of the seating  6  defined at the level of a rim  20  of the cavity  9 , with the area  21  of this rim  20  being furthermore defined by an outer circumference of the channel  14  emerging from the neck  12 .  
         [0068]     In the example shown, the hinge  7  is of the spring effect type and to this end incorporates a resilient strip  22 , connecting the first part  17  on one hand and the second part  18  on the other hand. In  FIG. 2   b , the resilient strip  22  is in a position of maximum extension corresponding to an unstable balance position. In effect, the distance  23  between the two points of attachment of the resilient strip  22  respectively to the two parts  17  and  18  is, in this position, slightly greater than the at-rest length of the resilient strip  22 .  
         [0069]     The strip  22  is attached to the two parts  17  and  18  such that the unstable position is obtained between the fully closed position as depicted in  FIG. 2   a  and the fully open position as depicted in  FIG. 2   c . By way of example, this open position is in part defined by a stop formed by an edge  24  of the lid  4  against the outer circumference of the channel  14  emerging from the neck  12 , or the outer circumference of the neck  12  itself. This outer circumference of the channel  14  or the outer circumference of the neck  12  can also participate in defining the inner circumference of the cavity  9  as shown.  
         [0070]     In this open position, the resilient strip  22  is in a stable position and does not tend to return by itself to the unstable position shown in  FIG. 2   b . Thus when the container  2  on which the device  1  is mounted is moved, the lid  4  remains in the open position and does not impede the dispensing of product via the aperture  5 . Furthermore, by the fact that the second portion  11 , serving as a bearing surface to move the lid  4  into the open position is disposed inside the cavity  9 , the user can grasp the container  2  over its full height, or at the level of the outer circumference of the body  3 , without risk of applying pressure to the upper surface  16  and therefore of reclosing the lid  4 .  
         [0071]     The lid  4  includes, at the upper surface  16 , two opposite ends  24   a  and  24   b  on an axis orthogonal to the axis  8 , the first end  24   a  partly delineating the first portion  10  and the second end  24   b  partly delineating the second portion  11 .  
         [0072]     Preferably, the device  1  is molded in a single piece from a thermoplastic material.  FIG. 2   d  shows the device  1  in the position in which it is molded. An additional feature of this mould in the illustrated example is that it has a second film-hinge  25  between the second part  18  and the lid  4 , and this second film-hinge  25  allows a degree of movement of the lid  4  relative to the second part  18 . This movement then facilitates assembly to the lid  4  relative to the second part  18  so as to make them integral. This arrangement can be advantageous in molding the device. The film-hinge  25  is, in this example, provided at the level of the second end  24   b.    
         [0073]     So that the movements applied to the lid  4  are transmitted to the second part  18 , the lid  4  is fitted onto the second part  18 , preferably in an irreversible manner, with a pinion or lug  26  engaging in a counterpart aperture  27 . In the example, the pinion or lug  26  forms an emergent part of the lower surface  19  (here shown uppermost, before assembly) capable of being inserted into the counterpart aperture  27  provided in the second part  18 . The assembly formed by the pinion  26  and counterpart aperture  27  provides an additional arrangement to secure the second part  18  to the lid  4 .  
         [0074]     As a variant, in the example shown in  FIGS. 3 and 4 , a device  1 , e.g., such as previously described, does not necessarily include a pinion or lug such as  26  and a counterpart aperture such as  27 . In this example, an external locking means or arrangement  28  can be mounted on the lid  4  so as to render its movement integral with the second part  18 . This external locking arrangement  28  can secure the second part  18  to the lid  4 .  
         [0075]     This external locking arrangement  28  takes the form of a clamp. An upper part  29  of the clamp  28  comes into contact with the upper surface  16  of the lid  4 , while a lower part  30  of the clamp  28  engages with a counterpart projection  31  presented by the second part  18  of the hinge  7  as shown in  FIGS. 3 and 4 .  
         [0076]     In parallel, the device  1  according to the invention can also include an arrangement to lock the lid in the closed position. This locking arrangement can be provided on the lid  4  to be fully or partially integral with the movements of the second part  18 . The locking arrangement can include at least one resilient tab which is preferably actuated by movements separate from those applied solely to tilt the lid  4  about the hinge  7 . Generally, with the lid  4  in the closed position, in order to cause the lid  4  to tilt in the illustrated example, it is necessary to exert pressure in at least one direction (or with a component of the force extending) orthogonal to the upper surface  16  of the lid. For this reason, the configuration of the resilient tab is preferably chosen so that it is necessary to exert pressure thereon in at least one direction parallel to the upper surface  16  of the lid, with this pressure being preferably exerted from a different area of the bearing surface provided at the level of the second portion  11  of the lid  4 .  
         [0077]     According to a first embodiment, by way of example, the locking arrangement  28  can additionally perform this closed position locking function. In this case, the locking arrangement  28  includes at least one resilient tab  32  which bears against the second end  24   b  of the lid  4  so as to push back the locking arrangement  28  some distance from this second end  24   b . The resilient tab  32  extends across the recess formed by the clamp, and notably the recess formed between the upper part  29  and the lower part  30 .  
         [0078]     Even though the resilient tab  32  repels the locking arrangement  28 , the latter nonetheless remains integral with or coupled to the lid  4 , and its travel in this direction is limited by the cooperation between the counterpart projection  31  and the lower part  30 . Preferably, the tab  32  is arranged so that when the arrangement  28  mounted on the lid  4  forms an extension  33  of the second end  24   b  of the lid  4 , this extension  33  is then opposite the rim  20  of the cavity  9 . In this at-rest position, the arrangement  28  therefore prevents insertion of the lid  4  into the cavity  9 . In the embodiments shown, the extension  33  corresponds to the junction point between the upper and lower parts  29  and  30  respectively.  
         [0079]     In a second embodiment, illustrated in  FIGS. 7   a  to  7   d , the device  1  does not have a separate locking arrangement as  28 . In particular, as shown in  FIGS. 7   a  to  7   d , the device  1  includes a resilient tab  50  connected to a cutout part or sloped portion  51  formed in the second portion  11  of the lid  4 . Preferably, with this example, the lid  4  and the resilient tab  50  are made in one piece, in particular by molding.  
         [0080]      FIG. 7   a  shows the position in which the lid  4 , the body  3  and the resilient tab  50  can be molded in a single pass. In this molding position, provision is also made to form the second film-hinge  25  between the second end  24   b  of the lid  4  and the second part  18 . This film-hinge  25  extends over part of the circumference of the lid  4 . Preferably the film hinge does not extend at the level of or in the portion of the circumference delineated by the cutout  51 . The absence of the film-hinge  25  at the cutout  51  makes it easier to move the resilient tab  50  from its molding position ( FIG. 7   a ) to an operational position ( FIGS. 7   b  to  7   d ) in which the movements applied to the lid  4  are transmitted at least partially to the second part  18 .  
         [0081]     The movement from the molding position to the operational positions is obtained by elastic deformation of the resilient tab  50  in contact with the second part  18 . In the molding position, the tab  50  is disposed substantially above the level of the first hinge  7 , whereas in the operational positions, it is substantially disposed below the level of this hinge  7 .  
         [0082]     Furthermore, the structure of the resilient tab  50  is such that the return from the operational position to the molding position cannot be readily accomplished from the outer surface of the device  1  when it is mounted on a container  2 . Even though, in the operational positions, and in particular as soon as the lid  4  has left the closed position, a degree of play is tolerated between the lid  4  and the second part  18 , the resilient tab  50  preferably serves to ensure that the device  1  is maintained in operational configurations.  
         [0083]     As a variant, provision may also be made in this second embodiment for cooperation of the type formed by the pinion or lug  26  and counterpart aperture  27  between the lid  4  and the second part  18  as discussed earlier.  
         [0084]     To facilitate opening of the lid  4 , it is first necessary to disengage the locking arrangement which locks the lid in the closed position. To do this, it is necessary to exert sufficient force to place the resilient tab  32  or  50  as appropriate under strain, until the locking arrangement  28  or  50  as appropriate does not remain against the rim  20 , and therefore rotation of the lid  4  about the hinge  7 , towards the inside of the cavity  9 , is no longer prevented.  
         [0085]     By way of example, the external surface of the upper part  29  can incorporate grooves to facilitate handling of the locking element  28  and to enable local pressure to be applied.  
         [0086]     To impart a greater degree of flexibility to the resilient tab  50  in the second embodiment, it is preferable to provide this tab  50  with a sufficient length. Providing the tab with a sufficient length is particularly advantageous in providing sufficient play, with the arrangement formed as a one-piece molding of one material, for example, polypropylene. By way of example, a play in the order of several millimeters, i.e. the thickness of the edge of the rim  20  against which the tab  50  is presented, is obtained preferably without having to exert a force greater than 1.5 kg. For this reason, the rim  20  incorporates a notch  52  locally lowering the level of the rim  20  delineating the cavity  9  relative to the seating  6 . Thus, the length of the tab  50  can be increased without modifying the overall vertical dimensions of the device  1 .  
         [0087]     By slightly increasing the vertical dimension of the device  1 , as shown in  FIGS. 7   a  to  7   d , the cutout or upwardly sloping portion  51  in the lid  4  can be made so that it stands out relative to the level defined by the upper surface  16 . Thus, the point of attachment  53  defined between the cutout  51  and the tab  50  can be slightly raised relative to the lid, which also makes it possible to increase the length of the tab  50  with a view to imparting greater flexibility thereto. For example, the point of attachment  53  contributes to the formation of a lug or protruding portion on the top of the lid  4 . Preferably, an angle  54  defined between the outer circumference at the level of the cutout  51  and the tab  50  is less than 90°, and more preferably less than 70°.  
         [0088]     Preferably, the tab  50  includes a concave portion  55 , directly adjacent to the point of attachment  53 , which is capable of accommodating at least one finger of a user.  
         [0089]     Thus, to facilitate opening of the lid according to the second embodiment, pressure is exerted in at least one direction parallel to a plane formed by the upper surface  16 , i.e., in at least one direction orthogonal (or having a component orthogonal) or transverse to the outer surface of the resilient tab  50 . The tab  50  is then deformed until its edge is no longer against the rim  20  of the cavity  9 . Thereafter, or simultaneously, pressure can also be exerted in a direction orthogonal to the second portion  11  of the upper surface  16 , as shown in  FIG. 7   c , and the lid  4  is then caused to move in rotation about the hinge  7 .  
         [0090]     A similar pressure exerted with the finger, for example on the concave portion  55 , and oriented at 45° relative to the upper surface  16  and at 45° relative to the portion of the tab  50  adjacent to the rim  20 , then includes components on the two axes identified above. Thus, with the same gesture, and using one hand, the user is able to unlock the closure means and cause the device to open by rotation of the lid. The lid  4  is then brought to the open position shown in  FIG. 7   d.    
         [0091]     Various alternative embodiments of the locking arrangement  28  are depicted in  FIGS. 5   a ,  5   b  and  5   c . In each of these variants the upper part  29  forms a continuous surface up to the zone forming the extension  33 . The lower part  30  is formed by a transverse beam connecting two lateral sides  34  and  35 , with these two sides  34  and  35  connecting the upper part  29  to the lower part  30  on either side.  
         [0092]     In a first variant, depicted in  FIG. 5   a , a tab  32   a  extends transversely between the upper part  29  and lower part  30 , with the tab  32   a  in this case attached to one of the sides, in this instance at the inner surface of side  34 .  
         [0093]     In a second variant, depicted in  FIG. 5   b , the tab  32   b  extends transversely between the upper part  29  and lower part  30 , with the tab  32   b  in this case attached at the level of the inner surface of the upper part  29  in the direction of the lower part  30 .  
         [0094]     In another variant, depicted in  FIG. 5   c , the device includes two tabs  32   c  and  32   d  each extending transversely between the upper part  29  and lower part  30 , with each of the tabs in this case attached to one of the sides. In this instance, tab  32   c  is attached at the level of the inner surface of side  35 , and tab  32   d  is attached at the level of the inner surface of side  34 .  
         [0095]     In the illustrated examples, the tabs  32  and  32   a  to  32   d  extend in a plane transverse, preferably orthogonal, to an axis on which the means  28  can be moved relative to the lid  4 .  
         [0096]     Thus, according to the first embodiment, in order to release the locking means  28 , pressure is exerted on the locking arrangement  28  in at least one direction (or having a component) parallel to a plane formed by the upper surface  16 . The tab such as  32  provided in the locking arrangement  28  is then compressed until it presses toward or against an inner surface of the means  28 . In this position, illustrated in  FIG. 6   a , the means  28  is no longer against the rim  20  of the cavity  9 . If a pressure is exerted in a direction at least orthogonal to the second portion  11  of the upper surface  16 , as shown in  FIG. 6   b , the lid  4  is then caused to move in rotation about the hinge  7 .  
         [0097]     In the case where the lid  4  includes a stud  15 , the balance of forces exerted at the level of the hinge  7  would mean, for a pressure exerted on the outer surface  16  of the second portion  11  to open the lid, a resistance opposes this force at the level of the inner surface of the first portion  10 , by virtue of friction or resistance of the stud  15  mounted in a leaktight manner in its aperture  5 .  
         [0098]     Given that the pressure exerted by a user is generally on the order of 1.5 kg, if the resistance is higher than this value, in order to avoid the user having to use an undesirably excessive force to move the lid  4 , the leverage values can be distributed in such a way that, by applying a force on the order of 1.5 kg or less, the stud  15  is still retracted from the aperture  5 .  
         [0099]     By way of example, the chosen length of the resistance leverage can be chosen such that it is shorter than the leverage length of the pressure force, with this length being determined relative to an axis orthogonal to the hinge axis  8 . Generally, the chosen length of the first portion  10  can preferably be selected to be shorter than the length of the second portion  11  relative to this axis orthogonal to axis  8 .  
         [0100]     Alternatively, when such leverages cannot be applied by virtue of a chosen design, provision can be made to momentarily modify the various relative leverage lengths, for example at the onset of application of pressure on the second portion. This can be achieved by modifying the axis of the “effective hinge” at the start of opening of the lid  4 . By modifying the resilience of the hinge  7  and/or the upper surface of the lid  4 , which are both capable of deforming by absorbing part of the strain applied thereto, a temporary hinge axis  36  can be created momentarily; see notably  FIGS. 2   a  and  6   a.    
         [0101]     This temporary hinge axis  36  can be formed by a brace  37  which bears on the seating  6 , in this instance the brace  37  is disposed at the level of the lower surface  19  of the first part  10  of the lid  4 , so that a leverage  38  associated with the pressure exerted on the second portion  11  is able to compensate or overcome the leverage  39  associated with the resistance caused by the stud  15  at the first portion  10 . Rotation of the lid  4  is then partly obtained about the temporary hinge axis  36 .  
         [0102]     From the moment when both the hinge  7  and the lid  4  are no longer capable of absorbing the strain by elasticity, the axis of rotation then reverts to the axis  8  of the hinge  7 , and the respective leverages  40  and  41  are more than sufficient to complete the opening action of the lid  4 . At this stage, the stud is generally already retracted from the aperture  5 , and there is no longer any force opposing the rotation imparted by the pressure on the second portion  11 .  
         [0103]     In an embodiment according to this alternative, the closure of the lid  4  is easy. The leverage  41  which can be obtained by pressure on the external surface  16  of the first part  10  is then greater than the leverage  40 .  
         [0104]     Throughout the description, including the claims, expressions such as including, comprising or having should be understood to be synonymous with “including at least”, unless otherwise specified.  
         [0105]     Of course, the invention is not limited to the examples described above, and the features of the different embodiments may be variously combined. Further, forms of the invention need not include each and every feature depicted in the illustrated embodiments.  
         [0106]     Obviously, numerous modifications and variations of the present invention are possible in light of the above teachings. It is therefore to be understood that, within the scope of the appended claims, the invention may be practiced otherwise than as specifically described herein.