ES2347377T3 - BOTTLE AND SIMILAR BOTTLE COVERED CAP WITH AN AUTOMATIC LID OPENING SYSTEM INCLUDING AN IMPROVED BUTTON. - Google Patents

Abstract

Cap with hinged lid for bottles and the like equipped with an automatic lid opening system comprising an improved push-button, said cap comprising: - a main body (1), provided with a supply port (2), suitable for application in a bottle neck or the like; said main body (1) having a lateral partition (11) and an upper base (12) on which said supply mouth (2) is arranged; - a hinged cover (3) attached to said main body (1) by means of a hinge joint (4), so that said cover (3) is suitable for pivoting between an open position and a collapsed position in which the seal said supply mouth (2); said main body (1) and said cover (3) being molded in a rigid plastic material; - an elastic element (7) disposed between said main body (1) and said cover (3) so that it exerts an elastic force of return of said cover (3) towards its open position, said elastic element (7) being made in an elastomeric material different from said rigid plastic material; - means (6a, 6b) for anchoring between said cover (3) and said main body (1) able to retain said cover (3) in its collapsed position; and - a push button capable of operating the release of said anchoring means (6a, 6b), so that by acting on said pushbutton an automatic and complete opening of the cover is obtained by the action of the elastic return force exerted by said element elastic (7); - said push-button being formed by a movable zone (5) molded in one piece together with said main body (1) in rigid plastic material, so that said movable zone (5) and said main body (1) are formed of a single molded part; said movable zone (5) comprising at least one front part (5a) delimited in said lateral partition (11) and joined at its lower end to said lateral partition (11) by a joint line (22) defining a pivot axis of said movable zone (5); said front part (5a) presenting a pulsating surface (13) suitable for receiving a user's finger in support; and said anchoring means (6a, 6b) comprising a first part (6a) formed in said movable zone (5) and a second part (6b) formed in said cover (3) and suitable for anchoring in said first part (6a) ; - characterized in that said movable zone (5) is delimited in said main body (1) by a deformable contour (8) defined by a geometric weakening of the own wall of said main body (1), said deformable contour (8) defining a continuous joint surface between said movable zone (5) and the rest of said main body (1); and - said deformable contour (8) has an upper section (8a) defining in said upper base (12) an upper part (5b) of the movable zone (5) and two lateral sections (8b) that define in said lateral partition (11) the front part (5a) of the movable zone (5), said lateral sections (8b) extending the ends of said upper section (8a) to said connecting line (22).

Description

Cap with folding lid for bottles and similar equipped with an automatic lid opening system that It includes an improved button.

Field of the Invention

The invention relates to the field of plugs with folding lid for bottles and the like.

More specifically, the invention relates to a cap with hinged lid for bottles and the like equipped with a automatic lid opening system comprising a push button improved, said cap comprising:

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a main body, provided with a supply mouth, suitable for apply on a neck of a bottle or similar;

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a flip cover attached to said main body by means of a joint hinge, so that said lid is able to pivot between a open position and a collapsed position in which the mouth is sealed of supply; said main body and said cover being molded in a rigid plastic material;

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a elastic element disposed between said main body and said lid so that it exerts an elastic return force of said lid towards its open position, said elastic element being realized in an elastomeric material different from said plastic material rigid;

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some anchoring means between said cover and said main body fit to retain said lid in its collapsed position; Y

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a button suitable for operating the release of said anchoring means, so that by acting on said elastic button a automatic and complete opening of the lid by force action elastic return exerted by said elastic element.

State of the art

Various plugs of the type indicated at beginning.

For example, documents EP0826606, EP0839735 and EP0975526 describe a plug of the type described at the beginning. A first feature of this plug is that the element Elastic elastomer material extends through the lid and the main body covering the anchoring means, with the purpose to provide a pleasant touch to the user when he acts on said anchoring means to release them. Now these anchoring means so arranged do not form a push button properly said and have the disadvantage that a volume is required added elastomeric material to be molded with a shape relatively complicated, which has a negative impact on the manufacturing cost of the cap.

A second feature of the disclosed plug by the cited documents EP0826606, EP0839735 and EP0975526 is that the elastic element has an extensible section that passes from one side to the other of the hinge joint when pivoting the lid between open and folded positions. As a consequence of Therefore, said extensible section suffers a maximum extension when the lid is in an intermediate position, so that the lid It has two resting positions: the open position and the dejected position. When the lid is in position dejected and the user wants to open it, he must release the means of anchor and push the lid against the force of the elastic element to take it beyond the intermediate position. This mode of operation has the disadvantage that complicates the opening of the lid by the user and does not provide a automatic and complete opening of the lid with a simple gesture of pulsation.

A third feature of the disclosed cap by the cited documents EP0826606, EP0839735 and EP0975526 is that the elastomeric material, in addition to forming a stretch extensible at the level of the hinge joint to perform a function elastic return of the lid, also extends over a part of the lid in order to ensure the seal of the supply hole Specifically, the elastomeric material is extends over the outer wall of a stud that is provided in the lid and that is forced into the supply mouth, of so that the elastomeric material is trapped between the wall exterior of the stud and the inner wall of the supply mouth. This solution has the disadvantage that the pin remains firmly locked in the supply mouth, thereby opening The lid is necessary to exert considerable force.

EP0976663 discloses a plug of the type considered at the beginning, but that differs from the plug disclosed by the cited documents EP0826606, EP0839735 and EP0975526 in which the only resting position of the lid is the open position, which corresponds to a minimum extension of the section extensible elastic element. This mode of operation is achieved thanks to the elastic element has a stretch extensible that is disposed between two nerves that form the junction hinge and that is attached to said nerves, so that said stretch is not free to move from one side of the union to the other of hinge. With respect to the opening system, in this case the stopper comprises an elastic button formed by the material elastomer The user presses on said elastic button to release the anchoring means and thus cause an opening automatic cover thanks to the return force exerted on the lid As regards the tight seal of the mouth supply, in this case the cover is provided with a stud that introduces into said supply mouth, but unlike plugs cited above, the elastomeric material is not extends over the stud, if not it forms the upper edge of the supply mouth in the main body. The lid opening it requires considerable force to extract the introduced busty in the mouth of supply. Therefore, to cause an opening automatic cover after release of anchoring means, the stretch of the elastic element must exert a force high return. On the other hand, said extensible section has a limited elasticity, since it is fixed to the nerves that Configure the hinge joint. With all this, the movement of lid opening is quite abrupt, which is unpleasant for the user. In addition, the design of the button formed by the elastomeric material has a negative impact on the costs of cap manufacturing.

JP8113260 refers to a cap that resembles the type of cap to which the invention refers, but in which the release of the anchoring means is not carried out by means of a pushbutton, if not in a classic way by stretching from an arranged visor on the lid. In this case, the elastomeric material only performs the function of elastic return of the lid, and is constituted by a separate piece that fits at its ends in housings provided in the lid and in the main body of the cap, presenting an extensible section intermediate that is freely disposed outside in relation to the hinge joint. The only resting position of the lid is the open position, which corresponds to a maximum extension of the extensible section. This is achieved thanks to a projection, arranged on the outer face of the lid, which receives said extendable section in support and keeps it in an external position with respect to the hinge joint. This arrangement of the projection has the disadvantage that it imposes significant restrictions on the exterior design of the cover. For example, it makes it impossible to design a lid with a clear outer surface. Another drawback of this arrangement is that the projection has a reduced support surface that produces a point tension and wear on the stretch of the elastic element. In addition, the arrangement of this projection does not allow manufacturing the one-piece plug by overmolding of the elastomeric material, since it is not possible to
demoulding

WO2004110889 discloses a type of cap in which the hinge joint is made by the own elastic element arranged as the only means of connection between the lid and the main body. This solution departs from the type of plug to which refers to the invention and has the disadvantage that considerably complicates the manufacture of the cap. For other part, in this case the cap does not comprise anchoring means proper; the maintenance function of the lid on your dejected position is performed by the lid's own bumper, which is it enters the supply mouth to seal it and is locked in this one by friction. The cap is provided with a button that It works by pushing the lid up until the pin is removed from the supply mouth This opening system presents the inconvenience that the user must act on the button displacing it enough to remove the pin from the mouth of supply. This operation is not very comfortable and departs from the a real push button, which must have more behavior instant.

EP 0 976 663 A discloses a stopper with the features of claim 1.

Summary of the invention

The invention aims to provide a cap of the type indicated at the beginning that allows an opening Automatic and complete cover acting on a button with a simple and comfortable gesture, and that does not present the inconveniences of known plugs cited in the foregoing.

In particular, the main purpose of the invention is to provide a plug with a button that acts as Quickly releasing the anchoring means between the lid and the main body, without the need to use elastomeric material to make the button and without significantly complicating the fabrication process.

This purpose is achieved by a plug according to claim 1.

This plug according to the invention does not require the use of elastomeric material for the realization of the button, which is based on local geometric shapes defined in the own rigid plastic material of the main body and lid. By other part, thanks to the fact that the first part of said means of anchor is arranged in the scrollable area of the main body, when the button is pressed, the release of the second part of the anchoring means and with it the lid opening. The acting surface on the button is in the scrollable zone itself, so that The user acts directly on the scrollable zone. This acting and direct release, combined with the return force which exerts the elastic element disposed between the lid and the body main, it seeks an easy and effective opening of the lid. For Press the button, the user acts on the surface of defined pulse on the front of the button, that is to say the sidewall of the main body, so that it can open comfortably cover with a single finger gesture, while Hold the bottle with one hand.

Said movable zone is delimited in said main body by a deformable contour defined by a geometric weakening of the body's own wall principal. This deformable contour provides greater robustness to the push button and, being deformable, allows limited pivoting but enough of the scrollable area around the line of Union.

Preferably, the geometric weakening of the wall of the main body that forms said deformable contour  it presents, in section, a layered and reduced thickness shape with with respect to the adjacent areas of said wall. Thanks to this particular shape, the deformable contour can be stretched and contract slightly, authorizing a movement of the area movable enough to release the anchoring means. For other part, this geometric configuration can be obtained without difficulty in the molding operation of the main body of the cap.

Said deformable contour has a section superior that defines in said upper base an upper part of the movable zone and two lateral sections that define in said lateral partition the front part of the movable zone, said lateral sections extending the ends of said upper section to said junction line. With this configuration you get a especially robust button. When you press with your finger on the Pulsating surface, you get with little effort the pivoting of the movable zone thanks to a contraction of the contour in the upper section and a lateral deformation in the lateral sections. The button only works if it is pushed on the pulse zone in a direction substantially perpendicular to to the sidewall the plug, which minimizes the possibility that the lid accidentally opens by contact with any outer element.

Preferably, said geometric weakening conforms the deformable contour in the form of a groove that presents in said lateral sections a decreasing depth towards the lower ends of said lateral sections, whereby reinforces the button without significantly affecting the pivoting of the deformable zone around the joint line.

Preferably, the anchoring means are formed by a window practiced in said front part of the movable area and by a protrusion in the form of a hook formed in the lid When the user acts on the surface of pressing, the scrollable zone moves away from the partition lateral with which the projection is disengaged from the window.

Said deformable contour defines a surface continuous connection between said movable zone and the rest of said main body, which prevents dirt or any outer element through the deformable contour.

The invention optionally contemplates advantageous embodiments that include relative characteristics  to the elastic element and to the parts of the main body and of the lid that interact with it to perform the functions of elastic return of the lid. These characteristics, in combination with the characteristics described in the preceding referring to the button, contribute to obtain a better behavior of the automatic opening of the lid, in particular one more opening effective but not too abrupt, and without impact negatively in the manufacturing costs of the cap.

In an advantageous embodiment of the invention, the Stopper is configured as follows:

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he elastic element has at least a first joining area in solidarity with said main body and at least a second zone of solidarity union to said cover, being defined between said first and second junction zones at least one extendable stretch of said elastic element;

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he main body of the cap comprises at least one protuberance that defines a seating surface located outside with with respect to said hinge joint; Y

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saying extensible stretch of the elastic element extends freely facing to said seating surface,

so that when the cover pivots towards its collapsed position said seating surface receives said support extensible stretch of the elastic element and keeps it located in external position with respect to the hinge joint. This configuration ensures that the stretchable stretch of the elastic element always be located in an external position with respect to the union hinge, whereby the only resting position of the lid is the open position that corresponds to a minimum extension of the section extensible elastic element. Thanks to the extensible stretch is freely arranged in front of the seating surface, its elasticity is not affected by interactions with the elements rigid plug. On the other hand, providing said protuberance design freedom is maintained in the main body of the cap of the lid and particularly possible solutions are made possible advantageous

One of these advantageous solutions consists of that the bulge that defines the support surface extends from a lower end located on the main body next to said first area of attachment of the elastic element to an end upper protruding from said main body and which is located next to said second area of attachment of the elastic element when the lid is in its down position. Thanks to this configuration, it is achieved that in the collapsed position of the lid the Extensible stretch of the elastic element is supported throughout its length on the seat surface, which are avoided local tensions and wear. It also prevents that section extensible can be hooked with an outer body during the transport or handling of the bottle that incorporates the plug.

Preferably, said seating surface it presents a convex section in which the extensible stretch of the elastic element in the collapsed position of the lid, thus obtaining a softer support that avoids tensions local.

In a preferred embodiment of the invention, said second area of attachment of the elastic element has a elongated shape that extends parallel to the axis of said joint hinge, and said elastic element is provided with two of said first joining areas, separated by an open space faced with said hinge joint, and two of said sections free extensible defined between said first joining areas and said second junction zones, said main body comprising two of said protuberances that define respectively two of said seating surfaces located outside with with respect to the hinge joint and face respectively with said two stretches of the elastic element. This configuration distributes the elastic effort between two sections extensible, allowing a better adjustment of the elastic force of return. It also facilitates the realization of the hinge joint, which is framed laterally by the two extendable sections.

In an advantageous embodiment of the invention, said main body and said cover have a truncated contour by respective flat faces joined by a bridge that constitutes said hinge joint, said protuberance protruding from the flat face of the main body, and said face flat of the cover presenting at least one window through which they appear said protuberance and said extensible stretch of the elastic element when the lid is in the collapsed position. This embodiment of the plug It has the advantage of being particularly compact.

The invention also contemplates, optionally, advantageous embodiments that include features relative to the tight seal of the supply mouth by of the lid. These features are intended to provide a plug in which the interaction between the lid and the mouth of supply does not involve significant friction between these elements, so that by releasing the anchoring means acting on the button, the lid opens without impediments, stretched by the return action of the elastic element without it having to exert a significant force to deobturate the mouth of supply.

Thus, in a preferred embodiment of the invention, said cover has on its inner face an area of flat contact made of elastomeric material and facing said supply mouth in the collapsed position of the lid, of such that said flat contact area of the elastic element is applied against the upper edge of said supply mouth. This flat contact area of the elastomeric material ensures a tight seal of the supply nozzle, without coupling exterior or interior with the supply mouth, whereby the Deobturation is produced by simple lifting of the lid without it is necessary to overcome a frictional resistance force.

Preferably, the inner face of said lid it is provided with a recess that houses said contact area flat, which facilitates its connection with the lid during cap manufacturing.

Preferably, said elastic element of elastomeric material that ensures the elastic return of the lid form also said flat contact area. It avoids having several different parts of elastomeric material and a process of manufacture of the overmoulded plug of the elastomeric material on the rigid plastic material of the main body and the top.

Preferably said elastic element it comprises a link strip that extends between said area of flat contact and the part of the elastic element where it is located the second junction zone, and the inner face of said lid is provided with a regatta that leads to said emptying and that hosts said link strip. This solution facilitates, in particular, the realization of the elastic element of elastomer material by  an overmolding procedure, since the regatta and the emptying do mold functions.

Preferably, said flat contact area and said link strip are disposed flush in said emptying and said regatta, respectively, thereby avoiding highlights in the inside face of the lid on which the dirt.

Preferably, the elastic element of elastomeric material is overmoulded in the piece of material rigid plastic formed by said main body and said lid, by example by a bi-injection procedure. In an advantageous solution, said elastic element passes through the thickness of said cover from said contact area and forms a layer outer elastomeric material that extends over at least one part of the outer face of the lid. This allows to inject the elastomeric material on the outer face of the lid and, at the same time, get an outer coating of elastomeric material that is suitable to form a geometry or advertising motif that you customize the plug

Brief description of the drawings

Other advantages and features of the invention they can be seen from the following description in which, without no limitation, preferential forms of embodiment of the invention mentioning the drawings that are accompany. The figures show:

Fig. 1, 2 and 3, respectively, views bottom, side and top of a cap according to a first form of embodiment of the invention, with the lid in the open position;

Fig. 4, a top perspective view of said plug;

Fig. 5 and 6, bottom perspective views, respectively anterior and posterior, of said stopper;

Fig. 7 and 8, respectively, views in upper and lower perspective of said cap, sectioned by a middle plane;

Fig. 9, a side view of said cap sectioned by a medium plane, with the lid in the collapsed position;

Fig. 10 and 11, perspective views upper of said cap, with the lid in the open position; Fig. 11 it is a fictitious decomposition of Fig. 10 in which it has been represented separately the elastic element of elastomeric material in the state in which it is in the position of Fig. 10.

Fig. 12 and 13, perspective views upper of said cap, with the lid in the closed position; Fig. 13 is a fictitious decomposition of Fig. 12 in which it has been represented separately the elastic element of elastomeric material in the state in which it is in the position of Fig. 12;

Fig. 14, a side view, sectioned by a middle plane of a plug according to a second embodiment that differs from the first only in that the elastomeric material is extends on the outer face of the lid;

Figs. 15 and 16, perspective views upper of a third embodiment of the cap, which differs of the previous ones in which the elastic element has a single section extendable in centered position; Fig. 16 is a decomposition dummy of Fig. 15 in which the elastic element of elastomeric material in the state in which it found in the position of Fig. 15; Y

Fig. 17, a partial perspective view, sectioned by a middle plane, of the cap of Figs. 15 and 16.

Detailed description of some embodiments of the invention

Figs. 1 to 13 illustrate a first example of embodiment of a cap according to the invention which is intended for apply in water bottles and that allows to open the lid easily with the same hand that holds the bottle, pressing with the finger a button arranged on the main body of the cap.

The plug is formed by a main body 1, which is provided with a supply port 2, and a cover 3 which it is connected to the main body 1 by a bridge 4 that functions hinge joint. The main body 1 and the cover 3 are molded in one piece in a rigid plastic material, by example polypropylene. The cover 3 can pivot with respect to the axis formed by the hinge joint 4 between an open position and a collapsed position in which the lid 3 seals the supply mouth 2. An elastic element 7, made of an elastomeric material, by example a thermoplastic elastomer (TPE), joins the main body 1 and the cover 3 so that it exerts an elastic force of return of the cover 3 towards its open position. As will be explained in more detail forward, the elastic element 7 has an extensible section 7c freely disposed outside in relation to the joint hinge 4, so when you close the lid 3 doing it pivot from its open position the stretch 7c stretches progressively and therefore always exerts a return force elastic cover 3 towards the open position.

Main body 1 has a shape globally cylindrical, with a lateral partition 11 and a base upper 12 in which the supply port 2 is arranged, and it is provided with a movable zone 5 delimited by an outline deformable 8 defined by a geometric weakening of the own main body wall 1, as can be seen in more detail in Figs. 4 to 6. The geometric weakening that makes up the deformable contour 8 has, in section, an angled shape and decreased thickness with respect to adjacent areas of the wall of the main body 1, and defines a continuous joint surface between said movable zone 5 and the rest of the main body 1, as can be seen in particular in Figs. 7 to 9. The contour deformable 8 thus formed has an upper section 8a in the form of U arranged in the upper base 12 of the main body 1 and two lateral sections 8b extending in the lateral partition 11 extending the ends of the upper section 8a and defining in said lateral partition 11 a front part 5a of the movable zone 5. The lower end of this front part 5a, in which the two lateral sections 8b end, it is attached to the partition lateral 11 forming a junction line 22 around which pivots the scrollable zone 5. As can be seen in Figs. 4 to 6, the groove formed by the geometric weakening that makes up the contour 8 has a decreasing depth towards the ends inferior of the lateral sections 8a, until reaching the line of junction 22. A pulsating surface 13, suitable for receiving in I support a user's finger, it is arranged in the front part 5a of the scrollable zone 5.

The cap comprises anchoring means between the cover 3 and the main body 1 formed by a window 6a practiced in the front part 5a of the movable zone 5 and a protrusion 6b in the form of a hook formed on the cover 3. To close the cover 3, the user swings it acting against the force of return of the elastic element 7, until the cover reaches the collapsed position shown in Fig. 9, in which the projection 6b is anchored in window 6a.

The movable zone 5 thus constituted forms a button suitable for operating the release of said anchoring means 6a, 6b and cause the subsequent automatic opening of the lid 3. To do this, the user pushes the surface of pulsation 13 causing a slight pivoting of the area movable 5, whose upper part moves away from the partition 11, with which projection 6b unlocks from window 6a and releases the lid 3, which pivots to its open position thanks to the force of return exerted by the elastic element 7. The pivoting of the movable zone 5 around the junction line 22 is accompanied of a contraction of the transverse side of the upper section 8a and of a lateral deformation of the lateral sections 8b and the sides longitudinal of said upper section 8a.

This embodiment of the cap according to the invention also incorporates particular characteristics relating to the elastic element 7 and the parts of the main body 1 and of the lid 3 that interact with it to perform the functions of elastic return of the lid 3. As can be seen in particular in Figs. 10 to 13, the elastic element 7 has two first joining areas 7a in solidarity with the main body 1 and a second joining area 7b in solidarity with the cover 7. Between the first joining areas 7a and the second joining area 7b extend each other Extensible sections 7c of the elastic element that are freely disposed in an external position with respect to the hinge joint 4. The first joining areas are separated by an open space 11 which faces the said hinge joint 4. The main body 1 comprises two protrusions 9 defining seating surfaces 10 located in an external position with respect to the hinge joint 4 and facing the extensible sections 7c of the elastic element. Each protuberance 9 extends from a lower end located in the main body 1, next to a first joining area 7a of the elastic element, to an upper end protruding from the main body 1 and which is located next to the second joining area 7b of the elastic element in the collapsed position of the cover 3. The surface 10 formed in each protuberance 9 has a convex section in its upper part, while in the lower part it is flat to facilitate demolding.
finger

The main body 1 and the cover 3 have a contour truncated by respective flat faces 19, 20 joined by bridge 4 which constitutes the hinge joint. The protrusions 9 protrude through the flat face 19 of the body main and flat face 20 of the cover has two windows 21 where protrusions 9 and extendable sections 7c appear of the elastic element 7 in the collapsed position of the cover 3, such as can be seen in Figs. 11, 12 and 13.

When the cover 3 pivots towards the position dejected illustrated in Figs. 9, 12 and 13, the surfaces of seat 10 receive in support the stretches 7c of the element elastic 7 and keep them located in outer position with regarding the hinge joint 4. Thanks to that, in any lid position 3 between the open position and the position dejected, the stretchable sections 7c are elastically extended, with respect to its state in said open position of the cover 3, of so that said open position is the only resting position of the cover 3. As can be seen in these figures, in the position the cover is folded down each extendable section is applied along full length against surface 10.

Also, this embodiment of the cap according to the invention incorporates particular characteristics that refer to the tight seal of the supply mouth by part of the lid. The elastic element 7 of elastomeric material is extends, from the part where the second junction zone is located 7b, by a link strip 15 to form at the end of it a flat contact area 14 between the cover 3 and the supply port 2. The inner face of the cover 3 is provided with a race 16 which flows into a central emptying said 17. The elastic element 7 of elastomeric material is formed by a process of overmoulded on the piece of rigid plastic material that they form the main body 1 and the cover 3, so that the link strip 15 and the flat contact area 14 are arranged flush, respectively, in said race 16 and in said emptying 17. As it can be seen in Fig. 9, in the collapsed position of the cover 3 the flat contact zone 14 of elastomeric material is applied against the upper edge of supply nozzle 2, without friction fit In this last.

Fig. 14 shows a second form of embodiment that is a variant of the first. In this case, the lid  3 has a central hole through which the material is injected elastomer in the overmolding process, so that the elastic element 7 of elastomeric material formed by this process through the thickness of the cover 7 from said flat contact 14 and forms an outer layer 18 of elastomeric material that is extends over a part of the outer face of the cover 3. The shape and the appearance of this outer layer 18 can be customized for each plug.

Finally, Figs. 15 to 17 show a third embodiment of the invention in which it has been provided an elastic element 7 with a single first junction zone 7a linked to the second junction zone 7b by a single extensible section 7c. The main body 1 has a single protrusion 9 central. In this case, the main body 1 and the cover 3 do not they have a truncated contour at the level of hinge joint 4 as in the previous embodiments, if said contour is substantially circular. The hinge joint 4 is formed in two parts arranged on either side of the central bulge 9.

Claims (4)

1. Cap with folding lid for bottles and similar equipped with an automatic lid opening system that comprises an improved button, said cap comprising:

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a main body (1), provided with a supply port (2), suitable to be applied on a neck of a bottle or the like; presenting said main body (1) a lateral partition (11) and a base upper (12) in which said supply mouth is arranged (2);

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a flip cover (3) attached to said main body (1) by means of a hinge joint (4), so that said cover (3) is suitable for pivot between an open position and a collapsed position in which seal said supply mouth (2); said main body (1) and said cover (3) being molded in a plastic material rigid;

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a elastic element (7) disposed between said main body (1) and said cover (3) so that it exerts an elastic return force of said cover (3) towards its open position, said elastic element (7) being made of an elastomeric material different from said rigid plastic material;

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some anchoring means (6a, 6b) between said cover (3) and said body main (1) fit to retain said cover (3) in position dejected Y

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a button suitable for operating the release of said anchoring means (6a, 6b), so that by acting on said button you get a automatic and complete opening of the lid by force action elastic return exerted by said elastic element (7);

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said button being formed by a movable zone (5) molded in one piece together with said main body (1) in rigid plastic material, so that said movable zone (5) and said main body (1) are shaped of a single molded piece; said movable zone (5) comprising at least one front part (5a) delimited in said lateral partition (11) and attached at its lower end to said partition lateral (11) by a connecting line (22) defining an axis of pivoting said movable zone (5); said front part (5a) presenting a pulsating surface (13) suitable for receiving in I support a user's finger; and comprising said means of anchor (6a, 6b) a first part (6a) formed in said zone movable (5) and a second part (6b) formed in said cover (3) and suitable for anchoring in said first part (6a);

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characterized in that said movable zone (5) is delimited in said main body (1) by a deformable contour (8) defined by a geometric weakening of the own wall of said main body (1), said deformable contour (8) defining a surface continuous connection between said movable zone (5) and the rest of said main body (1); Y

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saying deformable contour (8) has an upper section (8a) that defines in said upper base (12) an upper part (5b) of the zone movable (5) and two lateral sections (8b) that define in said lateral partition (11) the front part (5a) of the movable zone (5), said lateral sections (8b) extending the ends of said upper section (8a) to said junction line (22).

2. Cap according to claim 1, characterized in that the geometric weakening of the wall of the main body (1) that forms said deformable contour (8) has, in section, an angled shape and of diminished thickness with respect to the adjacent areas of said wall. 3. Cap according to claim 2, characterized in that said geometric weakening forms said deformable contour (8) in the form of a groove that has in said lateral sections (8b) a decreasing depth towards the lower ends of said lateral sections (8b). 4. Cap according to any of claims 1 to 3, characterized in that said anchoring means (6a, 6b) are formed by a window (6a) made in said front part (22) of the movable zone (5) and by a projection (6b) in the form of a hook formed in said cover (3).