BRPI0711935A2 - hinged lid closure for bottles and the like with an automatic lid opening system comprising an improved button - Google Patents

Abstract

A push button has an adjustable zone with a front part pivotal to the side dividing wall of a cork main body. The adjustable zone also forms a fixing part fastened to a complementary fixing part formed on the lid.

Description

Patent Descriptive Report for "ARTICULATED LID CLOSURE FOR BOTTLES AND SIMILAR WITH AN AUTOMATIC LID OPENING SYSTEM UNDERSTANDING A PERFECT BUTTON"

DESCRIPTION

FIELD OF INVENTION

The present invention relates to the field of closures with hinged bottle caps and the like.

More particularly, the present invention relates to a hinged lid closure for bottles and the like having an automatic lid opening system comprising an improved button, said closure comprising:

a main body having a supply mouth suitable for application to the neck of a bottle or the like;

- a hinged lid joined to said main body by a hinge joint, so that said lid can pivot between an open position and a hinged position in which it blocks said supply mouth; said main body and said lid being molded from rigid plastics material;

an elastic element disposed between said main body and said cap such that it exerts a spring return force on said cap towards its open position, said elastic element being made of an elastomer material other than said plastic material hard;

securing means between said lid and said main body suitable for retaining said lid in its pivotal position; and

- a button suitable for operating the release of said securing means, so that acting on said button, the lid is opened automatically and completely due to the action of the spring return force exerted by said elastic element.

TECHNICAL STATE

Several closures of the type indicated at the beginning are known.

For example, EP0826606, EP0839735 and ΕΡ0975526 describe a closure of the type described at the beginning. A first feature of this closure is that the elastic member made of an elastomeric material extends over the lid and the main body covering the fastening means, so that said fastening means are pleasant to the touch when user acts on them to release them. However, these fasteners do not form an appropriate button and suffer from the inconvenience that an additional amount of elastomer material is required which must be molded according to a relatively complicated shape, which has a negative effect on the fabrication cost of the material. closure.

A second feature of the closure described by said documents EP0826606, EP0839735 and EP0975526 is that the elastic element has an extendable section that passes from side to side of the pivot joint when the cover pivots between its open and hinged positions. Consequently, said extendable section is extended to the maximum when the lid is in an intermediate position, where the lid has two rest positions: the open position and the hinged position. When the cover is in the hinged position and the user wishes to open it, release the fastening means and push the cover against the force of the elastic element beyond the intermediate position. This mode of operation suffers from the inconvenience that complicates the lid opening operation for the user, and does not open the lid automatically and completely with a single push action.

A third feature of the closure described in said documents EP0826606, EP0839735 and EP0975526 is that, in addition to forming an extensible level section with the pivot joint to produce a spring return function for the cover, the Elastomer material also extends over part of the lid to ensure sealing of the supply hole. In particular, the elastomer material extends over the outer wall of a pin that is provided in the cap and is forcibly inserted into the supply port, where the elastomer material is compressed between the outer wall of the pin and the inner wall of the supply mouth. This solution suffers from the drawback that the pin is firmly inserted into the supply mouth, and thus considerable force is required to open the lid.

EP0976663 describes a closure of the type considered at the outset, but which is different from the closure described in said EP0826606, EP0839735 and EP0975526 because the rest position of the lid is in the open position, which corresponds to a minimum section length. extension of the elastic element. This mode of operation is obtained by virtue of the elastic element having an extensible section, which is arranged between two splines forming the pivot joint, and is joined in said splines, so that said extensible section cannot pass through. freely from side to side of the pivot joint. With respect to the opening system, in this case the closing comprises an elastic button made from the elastomeric material. The user presses said elastic knob to release the fastening means and thus causes the lid to open automatically thanks to the spring return force exerted on said lid. As for the supply mouth seal, in this case the cap is provided with a pin that is inserted into said supply mouth, but contrary to the closures mentioned above, the elastomeric material does not extend over the pin instead. forms the top edge of the supply mouth on the main body. In order to open the cap, considerable force is required to extract the pin inserted into the supply mouth. Therefore, so that the lid opens automatically once the securing means has been released, the extensible section of the elastic element must exert a strong spring return force. Moreover, said extensible section has limited elasticity as long as it is fixed to the splines forming the pivot joint. Consequently, the opening movement of the lid is quite abrupt, which is not very pleasant to the user. Also the design of the push button formed by the elastomer material has a negative effect on the closure manufacturing costs.

JP8113260 relates to a closure that resembles the type of closure referred to in the invention, but in which the securing means are not released by means of a button but rather by traditional means by pulling a visor supplied on the cover. In this case, the elastomeric material only performs the spring return function of the lid, consisting of a separate portion that fits at its ends into the housing provided in the lid and the main body of the closure, and has an intermediate extendable section. which is freely positioned externally with respect to the pivot joint. The rest position of the cover is in the open position, which corresponds to a maximum extension section extension. This is achieved by virtue of a projection, provided on the outer surface of the cover, which receives and supports said extendable section and is positioned externally with respect to the pivot joint. This projection arrangement suffers from the drawback that imposes significant restrictions on the external design of the lid. For example, it makes it impossible to draw a lid with a transparent outer surface. Another drawback of this arrangement is that the projection has a reduced support surface that causes localized stress and erodes the extensible section of the elastic member. Furthermore, having said projection, it is not possible to manufacture the closure as an integral part by overmolding the elastomeric material, since the part cannot be released from the mold.

W02004110889 describes a type of closure wherein the pivot joint is made from the elastic member arranged as a single connecting means between the cover and the main body. This solution is different from the type of closure described in the invention and suffers from the inconvenience that considerably complicates the manufacture of the closure. Moreover, in this case the closure does not comprise securing means in the strict sense; The function of keeping the lid in its hinged position is performed by the pin provided in the lid, which is inserted into the supply mouth to seal it and remains fixed therein due to friction. The closure is provided with a button that is operated by pressing the lid up until the pin withdraws from the supply mouth. This opening system suffers from the inconvenience that the user must actuate the knob by moving it sufficiently to remove the pin from the supply mouth. This is not very comfortable and differs from the operation of an appropriate button, which should act instantly. SUMMARY OF THE INVENTION

The aim of the invention is to provide a closure of the type indicated at the beginning, which allows the lid to be opened automatically and completely by pressing a button with a simple comfortable action, which does not suffer from the drawbacks of the known closures mentioned above.

In particular, the main object of the invention is to provide a fast acting button closure releasing the fastening means between the lid and the main body, without the need to use elastomeric material to form the button and without significantly complicating the manufacturing process.

This is achieved by a closure of the type indicated at the outset, characterized in that the main body has a sidewall and an upper base on which the supply mouth is provided; the button is made of a movable area which is integrally molded together with said main body of rigid plastic material and comprising at least one front part delimited in said side wall and joined at its lower end thereto by a junction line defining a pivoting axis for said movable area, said front portion having a pressing surface that is suitable for receiving a finger from the user; and the securing means comprises a first portion formed in said movable area and a second portion formed in said lid and suitable for attachment to said first portion.

This closure according to the invention does not require using elastomeric material to form the button; It is based on local geometric shapes defined on the existing rigid plastic material of the main body and lid. Furthermore, thanks to the fact that the first part of said securing means is provided in the movable area of the main body, when the button is activated, the second part of the securing means is released directly and the lid is opened. The surface for activating the button is located in the existing mobile area, where the user acts directly in the mobile area. This direct activation and release, combined with the spring return force exerted by the plastic element provided between the cover and the main body, easily and effectively opens the cover. In order to activate the button, the user acts on the pressing surface defined on the front of the button, in other words on the side wall of the main body, so that the lid can be opened comfortably with a simple finger movement while Holds the bottle in one hand.

Preferably, said movable area is delimited in said main body by a deformable contour defined by a geometrical weakening of the existing wall of said main body. This deformable contour makes the knob more robust and, as long as it is deformable, leaves the moving area limited but sufficient to pivot around the junction line.

Preferably, the geometric weakening of the main body wall forming said deformable contour has, in section, an elbow shape and a reduced thickness with respect to the adjacent areas of said wall. Because of this particular shape, the deformable contour can be slightly stretched and contracted, allowing sufficient movement of the movable area to release the securing means. Moreover, this geometric arrangement can be easily obtained during the molding operation for the main body of the closure.

Advantageously, said deformable contour has an upper section which defines in said upper base an upper part of the movable area and respective side sections which define in said side wall the front part of the movable area, said side sections extending the ends of said upper section to said junction line. With this arrangement, a particularly robust button is obtained. Using the finger to press the pressure surface, the moving area is pivoted with little effort because the contour of the section contracts and the side sections are deformed at the sides. The button works only if the pressure area is pressed in a direction that is noticeably perpendicular to the sidewall of the lock, thereby minimizing the possibility that the lid will accidentally open when it comes in contact with any one. external element.

Preferably, said geometrical weakening forms said deformable contour in the form of a groove, the depth of which decreases in said side sections to the lower ends thereof, which reinforces the knob without significantly affecting the pivot of the deformable area in the groove. around the junction line.

Preferably, the securing means consists of a window in said front of the movable area and a hook-shaped projection formed in the lid. When the user acts on the pressure surface, the moving area is moved away from said side wall thereby disengaging the window projection.

Preferably, said deformable contour defines a continuous joining surface between said movable area and the rest of said main body, thereby preventing dirt or any external element from entering through the deformable contour.

The invention optionally contemplates some advantageous embodiments including features of the elastic member and the main body parts and the lid interacting therewith to perform the spring return function of the lid. These features, in combination with those described above in connection with the pushbutton, contribute to improved performance of the automatic lid opening, in particular a more effective opening that is not as abrupt as to negatively affect. the manufacturing costs of closing.

In an advantageous embodiment of the invention, the closure is formatted as follows:

- the elastic member has at least one first joint area fixedly fixed to said main body and at least one second joint area fixedly fixed to said cap with at least one extensible section of said elastic element being defined between said first and second junction areas;

- the main body of the closure comprises at least one projection defining a seating surface externally positioned with respect to said pivot joint; and

- said extensible section of the elastic element extends freely in front of said seating surface,

so that the pivot cover for its hinged position is said seating surface which receives said extensible section of the elastic element resting on said seating surface and holds said extending section positioned externally with respect to the pivot joint. This arrangement ensures that the extensible section of the elastic element is always positioned externally with respect to the pivot joint, where the rest position of the cover only is in the open position which corresponds to a minimum extension of the elastic element extending section. Because the extensible section is arranged freely opposite the seating surface, its elasticity is not affected by interference with the rigid closure elements. Furthermore, providing said projection on the main body of the closure maintains the freedom of the lid design, making particularly advantageous solutions possible.

One such advantageous solution is the projection that defines the seating surface extending from a lower end of the main body near said first junction area of the elastic element to a projecting upper end of said main body and which is close to one another. of said second junction area of the elastic member when the lid is in its hinged position. By virtue of this arrangement, when the lid is in the hinged position the extensible section of the elastic member rests its entire length on the seating surface, thereby preventing localized stress and wear. Also said extendable section is prevented from attaching to any external body while the bottle incorporating the closure is in transit or being manipulated.

Preferably, said seating surface has a convex shaped section in which the extensible section of the elastic element rests in the hinged position of the lid, thus providing soft support that prevents localized tension.

In a preferred embodiment of the invention, said second junction area of the elastic member has an elongate shape extending parallel to the axis of said pivot joint, and said elastic element has two of said first junction areas, separated by a space. open facing said hinge joint, and two of said free extensible sections defined between said first joint areas and said second joint area, said main body comprising two of said projections which respectively define two of said surfaces seat positions externally with respect to the pivot joint and turned respectively to said two extensible sections of the elastic element. This arrangement distributes the tensile stress between two extendable sections, thereby allowing for a perfect spring return force adjustment. Also, it makes it easier to form the pivot joint, which is adjusted on the sides by the two extendable sections.

In an advantageous embodiment of the invention, said main body and said cap have an outline that is truncated by respective flat surfaces joined by a bridge forming said pivot joint, said projection projecting from the flat surface of the main body. , and said flat surface of the lid having at least one window through which said projection and said extensible section of the elastic member protrude when the lid is in the pivotal position. This lock mode has the advantage that it is particularly compact.

The invention also optionally contemplates some advantageous embodiments including features regarding the sealing of the supply mouth cap. These characteristics are intended to provide a closure in which the interaction between the lid and the supply mouth does not produce significant friction between these elements, so that when the fastening means are released by actuating the button, the lid opens without any hindrance. , stretched by the spring return action of the elastic element, without the latter having to exert any significant force to unlock the supply mouth.

Thus, in a preferred embodiment of the invention, said lid is provided on its inner surface with a flat contact area made of elastomeric material and facing said supply mouth in the hinged position of the lid, so that said area of flat contact of the elastic element is applied against the upper edge of said supply mouth. This flat contact area made of elastomeric material ensures that the supply mouth has an air tight seal, without any external or internal coupling with the supply mouth, where said supply mouth is simply unlocked by lifting the lid. without overcoming any strong frictional force.

Preferably, the inner surface of said lid has a hollow area housing said flat contact area, and makes it easier to attach it to the lid when manufacturing the closure.

Preferably, said elastic member made of elastomeric material which ensures the spring return action of the lid also forms said flat contact area. This avoids having different pieces of elastomeric material and facilitates the manufacturing process by over-closing the elastomeric material over the rigid plastic material of the main body and lid.

Preferably, said resilient member comprises a connecting strip extending between said flat contact area and the part of the resilient element where the second junction area is provided, and the inner surface of said cap has a channel which takes it into the hollow area and houses said connection strip. In particular, this solution facilitates forming the elastic member made of elastomeric material with an overmolding method, because the channel and hollow area act as a mold.

Preferably, said flat contact area and said connection strip are arranged flush with said hollow area and said channel, respectively, thereby preventing any projections on the inner surface of the lid where dirt could accumulate. .

Preferably, the elastic member made of elastomeric material is overmolded into the rigid plastics material composed of said main body and said cap, for example using a biinjection method. In an advantageous solution, said elastic member traverses the thickness of said cap from said contact area and forms an outer layer of elastomeric material extending over at least part of the outer surface of the cap. In this way the elastomeric material may be injected onto the outer surface of the lid and at the same time an outer coating of the elastomeric material that is suitable to form an advertising or geometric motif that personalizes the closure may be obtained.

BRIEF DESCRIPTION OF DRAWINGS

Further advantages and features of the invention will be appreciated from the following description which in a non-limiting manner explains the preferred embodiments of the invention with reference to the accompanying drawings in which:

Figures 1, 2 and 3 show respectively a bottom, side and top view of a closure according to a first embodiment of the invention with the lid in the open position;

Figure 4 shows a top perspective view of said closure;

Figures 5 and 6 show lower perspective views, respectively front and rear, of said closure;

Figures 7 and 8 respectively show upper and lower perspective views of said closure selected along a medium plane;

Figure 9 shows a side view of said sectional closure along a medium plane with the lid in the hinged position;

Figures 10 and 11 show top perspective views of said closure, with the lid in the open position; Fig. 11 is a fictional unfolding of Fig. 10 wherein the elastic member made of elastomeric material has been shown separate from as it appears in the position shown in Fig. 10;

Figures 12 and 13 show top perspective views of said closure with the lid in the hinged position; Fig. 13 is a fictional unfolding of Fig. 12 wherein the elastic member made of elastomeric material has been shown separate as it appears in the position shown in Fig. 12;

Figure 14 shows a sectional side view along a middle plane of a closure according to a second embodiment differing from the first only in that the elastomeric material extends along the outer surface of the lid;

Figures 15 and 16 show top perspective views of a third closure embodiment, which differs from the previous embodiments in which the elastic member has a single extensible section in the central position; Fig. 16 is a fictional unfolding of Fig. 15 wherein the elastic member made of elastomeric material has been shown to appear separately in the position shown in Fig. 15; and

Figure 17 shows a partial perspective view, in section along a medium plane, of the closure in Figures 15 and 16.

DETAILED DESCRIPTION OF SOME MODES OF THE INVENTION

Figures 1 to 13 illustrate a first embodiment of a closure according to the invention which is intended to be applied to water bottles and which allows the lid to be easily opened with the same hand holding the bottle using a finger to press a button provided on the main body of the lock.

The closure is made of a main body 1 having a supply mouth 2 and a cap 3 which is joined to the main body 1 by a bridge 4 which performs the functions of a pivot joint. The main body 1 and the lid 3 are molded as an integral part of a rigid plastic material, for example polypropylene. Cap 3 may pivot with respect to the axis formed by pivot joint 4 between an open position and a pivotal position where cap 3 blocks supply mouth 2. An elastic element 7, made of elastomeric material, for example a thermoplastic elastomer (TPE), joins the main body 1 and the lid 3 so that it exerts a spring return force on the lid 3 to its open position. As will be explained in detail below, the elastic member 7 has an extensible section 7c freely positioned externally with respect to pivot joint 4, so that when the lid 3 is closed pivoting from its open position, the extendable section 7c it gradually becomes more tense and therefore always exerts a spring return force on cap 3 to its open position.

The main body 1 has a full cylindrical shape, with a sidewall 11 and an upper base 12 wherein the supply mouth 2 is provided, and has a movable area 5 delimited by a deformable contour 8 defined by a geometric weakness. in the existing wall of the main body 1, as can be seen in greater detail in figures 4 to 6. The geometrical weakness forming the deformable contour 8 has, in section, an elbow shape and reduced thickness with respect to the areas. adjacent the main body wall 1, and defines a continuous joining surface between said movable area 5 and the rest of a main body 1, as can be seen in particular in Figures 7 to 9. The deformable contour thus formed 8 it has a U-shaped upper section 8a provided on upper base 12 of main body 1 and respective side sections 8b extending within lateral wall 11 extending the ends of upper section 8a and defined in said wall and side 11, a moving area front part 5a. The lower end of said front part 5a, into which the two side sections 8b lead, is joined to the side wall 11 forming a junction line 22 at around which the movable area 5 pivots. As can be seen from figures 4 to 6, the depth of the groove formed by the geometric weakness forming the contour 8 decreases to the lower ends of side sections 8a to the junction line 22. A pressing surface 13 suitable for receiving a finger from the user, is provided at the front 5a of the movable area 5.

The closure comprises securing means between the lid 3 and the main body 1 consisting of a movable area front window 5a 5a and a hook-shaped projection 6b formed in the lid 3. In order to close the lid 3, pivot user acting against spring return force of elastic member 7, until the lid reaches the hinged position shown in figure 9, where projection 6b is secured to window 6a.

The movable area thus formed 5 forms a button suitable for operating the release of said securing means 6a, 6b and causing subsequent automatic opening of the lid 3. To do this, the user presses the pressure surface 13 with its the finger moving the area 5 slightly pivot, the top of which moves away from the wall 11, where the projection 6b withdraws from the window 6a and releases the lid 3, which pivots to its open position thanks to the force of spring return exerted by the elastic element 7. The pivoting of the movable area 5 around the junction line 22 is accompanied by a transverse contraction of the upper section 8a in a lateral deformation of side sections 8b and the longitudinal sides of said upper section. 8a.

This embodiment of the closure according to the invention also includes some particular features of the elastic element 7, and the main body parts 1 and the lid 3 which interact with it to perform the spring return function of the lid 3. As may be viewed in particular from figures 10 to 13, the elastic member 7 has two joint areas 7a integral with the main body 1 and a second joint area 7b integral with the cover 3. Between the first joint areas 7a and the second junction area 7b, respective extendable sections 7c of the elastic element are provided, which are freely positioned externally with respect to the pivot joint 4. These first junction areas are separated by an open space 23 facing said junction. pivot joint 4. The main body 1 comprises two projections 9 defining seating surfaces 10 positioned externally with respect to pivot joint 4 and turns to the extensible section of elastic member 7c. Each projection 9 extends from a lower end located on the main body 1 near the first junction area 7a of the elastic member to a projecting upper end of the main body 1 and is located near the second junction area 7b of the elastic member. elastic element in the hinged position of the lid 3. The surface 10 formed in each projection 9 has a convex shaped section at the top of the same, while the bottom is flat to facilitate removal of the mold.

The main body 1 and the lid 3 have a contour which is cracked by respective flat surfaces 19, 20 joined by the bridge 4 forming the pivot joint. The projections 9 protrude from the flat surface 19 of the main body and the flat surface 20 of the lid has respective windows 21 through which the projections 9 and extendable sections 7c of the elastic member 7 protrude in the hinged position of the lid 3, as can be be seen in figures 11, 12 and 13.

When the lid 3 pivots to the hinged position shown in figures 9, 12 and 13, seating surfaces 10 receive and support extensible sections 7c of elastic member 7 and hold them externally with respect to hinge joint 4. By virtue of this arrangement In any position of the lid 3 between its open and hinged positions, the extendable sections 7c are stretched with respect to their state in said open position of the lid 3, wherein said open position is the rest position only. As can be seen from said figures, in the hinged position of the lid, the entire length of each extensible section is applied against the surface 10.

Also, this embodiment of the closure according to the invention includes particular features regarding the air tight seal of the supply port lid. The elastic member 7 made of elastomeric material extends from the part where the second junction area 7b is provided along a connecting strip 15 to form at the end of the latter a flat contact area 14 between the lid 3 and the supply mouth 2. The inner surface of the lid 3 has a channel 16 leading into said central hollow area 17. The elastic member 7 made of elastomer material is formed by an overmolding method on a piece of rigid plastic material formed by the main body 1 and the lid 3, so that the connecting strip 15 and the flat contact area 14 are provided respectively with said channel 16 and said hollow area 17. As can be seen in figure 9 In the hinged position of the lid 3 the flat contact area 14 made of elastomeric material is applied against the upper edge of the supply mouth 2 without being inserted therein by friction.

Figure 14 illustrates a second embodiment which is a variant of the first. In this case, the lid 3 has a central hole through which the elastomeric material is injected into the overmolding process, so that the elastic element 7 which is made of elastomeric material and formed by this process crosses the thickness of the lid 3 of said elastomeric material. flat contact area 14 and forms an outer layer 18 of the elastomeric material extending over part of the outer surface of the lid 3. The shape and appearance of said outer layer 18 may be customized for each closure.

Finally, Figures 15 to 17 illustrate a third embodiment of the invention wherein an elastic element 7 has been provided with a single joint area 7a joined at the second joint area 7b by a single extensible section 7c. The main body 1 has a single central projection 9. In this case, the main body 1 and the lid 3 do not have a contour that is truncated in level with the pivot joint 4 as in the preceding embodiments, instead of said contour is substantially circular. . The pivot joint 4 is made of two parts arranged on either side of the central projection 9.

Claims (19)

1. Hinged lid closure for bottles and the like having an automatic lid opening system comprising an improved button, said closure comprising: - a main body (1) provided with a supply mouth (2) suitable for be applied to the neck of a bottle or the like; - a hinged lid (3) joined to said main body (1) by a hinging joint (4), so that said lid (3) can pivot between an open position and a hinged position in which it locks said hinge. supply mouth (2); said main body (1) and said lid (3) being molded from rigid plastics material; an elastic element (7) disposed between said main body (I) and said lid (3), so as to apply a spring return force on said lid (3) towards its open position, said elastic member (7) being made of an elastomer material other than said rigid plastic material; securing means (6, 6a) between said lid (3) and said main body (1) suitable for holding said lid (3) in its pivotal position; and - a button suitable for operating the release of said securing means (6a, 6B), so that acting on said button, the lid is opened automatically and completely due to the action of the spring return force exerted by said element. elastic (7); characterized in that: said main body (1) has a side wall (11) and an upper base (12) on which the supply mouth (2) is provided; said button is made of a movable area (5) integrally molded with said main body (1) of rigid plastics material, said movable area (5) comprising at least one front part (5a) delimited in said side wall (11) and joined at its lower end on said sidewall (II) by a junction line (22) defining a pivoting axis of said moving area (5), said front (5a) having a pressure surface ( 13) Suitable for receiving a finger from the user; and said securing means (6, 6a) comprises a first part (6a) formed in said movable area (5) and a second part (6b) formed in said lid (3) and suitable for attachment to said first part (1). 6a). Closure according to claim 1, characterized in that said movable area (5) is delimited in said main body (1) by a deformable contour (8) defined by a geometric weakening of the existing wall of said body main (1). Closure according to claim 2, characterized in that the geometrical weakness of the main body wall (1) forming said deformable contour (8) has, in section, an elbow shape and a reduced thickness with relation to adjacent areas of said wall. Closure according to claim 2 or 3, characterized in that said deformable contour (8) has an upper section (8a) defining on said upper base (12) an upper part (5b). ) of the movable area (5) and respective side sections (8b) defining in said side wall (11), the front (5a) of the movable area (5), said side sections (8b) extending the ends of said section. (8a) to said junction line (22). Closure according to claims 3 and 4, characterized in that said geometric weakness forms said deformable contour (8) in the form of a groove which, in said side sections (8b) has the depth decreasing towards the lower ends of said side sections (8b). Closure according to any one of claims 1 to 5, characterized in that said securing means (6a, 6b) consist of a window (6a) in said front (5a) of the movable area (5 ) and a hook-shaped projection (6b) formed in the lid (3). Closure according to any one of claims 2 to 6, characterized in that said deformable contour (8) defines a continuous joining surface between said movable area (5) and the rest of said main body ( 1). Closure according to any one of claims 1 to 7, characterized in that: - said elastic element (7) has at least one first joint area (7a) fixedly fixed to said main body (1). 1) and at least a second junction area (7b) fixedly fixed to said cap (3), with at least one extensible section (7c) of said elastic member (7) being defined between said first (7a) and second (7b) junction areas; - said closure main body (1) comprises at least one projection (9) defining a seating surface (10), said seating surface (10) being positioned externally with respect to said pivot joint. (4); and - said extensible section (7c) of the elastic element (7) extends freely in front of said seating surface (10), so that said lid (3) pivots to said pivoting position (10) ) receives said extensible section (7c) from the elastic element (7), which rests on said seating surface (10), and holds said extensible section (7c) positioned externally with respect to the pivot joint (4). Closure according to claim 8, characterized in that said projection (9) extends from a lower end located on said main body (1), close to said first junction area (7a) of the elastic element. (7) to an upper end protruding from said main body (1) and located near said second junction area (7b) of the elastic member (7) when the cap (3) is in its position. articulated. Closure according to claim 9, characterized in that said seating surface (10) has a convex shaped section in which said extensible section (7c) of the elastic element rests in the hinged position of the lid (3). ). Closure according to claims 8 and 10, characterized in that said second joint area (7b) of the elastic element (7) has an elongate shape extending parallel to the axis of said articulation joint. (4), and said elastic member (7) has two of said first joint areas (7a), separated by an open space (23) facing said pivot joint (4), and two of said sections free extensible struts (7c) defined between said first junction areas (7a) and said second junction area (7b), said main body (1) comprising two of said projections (9) which respectively define two of said surfaces. seating members (10) positioned externally with respect to the pivot joint (4) and facing respectively said two extending sections (7c) of the elastic element. Closure according to any one of claims 8 to 11, characterized in that said main body (1) and said lid (3) have a contour which is truncated by respective flat surfaces ( 19, 20) joined by a bridge (4) forming said pivot joint (4), said projection (9) extending along the flat surface (19) ° of the main body (1), and the said flat surface (20) of the cap (3) having at least one window (21) through which said projection (9) and said extendable section (7c) of the elastic element (7) protrude when the cap ( 3) is in the hinged position. Closure according to any one of claims 1 to 12, characterized in that said lid (3) has on its inner surface a flat contact area (14) made of elastomeric material which is capable of turns to said supply mouth (2) in the hinged position of the cap (3) so that said flat contact area (14) of the elastic element is applied against the upper edge of said supply mouth (2). ). Closure according to claim 13, characterized in that the inner surface of said lid (3) has a hollow area (17) housing said flat contact area (14). Closure according to claim 13 or 14, characterized in that said elastic element (7) forms said flat contact area (14). Closure according to claim 15, characterized in that said elastic element (7) comprises a connection strip (15) extending between said flat contact area (14) and the part of the elastic member (7) where the second junction area (7b) is provided, and wherein the inner surface of said cap (3) has a channel (16) leading into the hollow area (17) and housing the said connecting strip (15). Closure according to claim 16, characterized in that said flat contact area (14) and said connecting strip (15) are provided flush with said hollow area (17) and said channel (16) respectively. Closure according to claim 16 or 17, characterized in that said elastic element (7) made of eustomeric material is overmolded into the rigid plastic material forming said main body (1). and said lid (3). Closure according to claim 18, characterized in that said resilient element (7) crosses the thickness of said cap (3) from said contact area (14) and forms an outer layer. (18) of elastomeric material extending over at least part of the outer surface of the cap (3).