EP3807161B1 - Behälter mit einem bistabilen deckel - Google Patents

Behälter mit einem bistabilen deckel Download PDF

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Publication number
EP3807161B1
EP3807161B1 EP19746430.8A EP19746430A EP3807161B1 EP 3807161 B1 EP3807161 B1 EP 3807161B1 EP 19746430 A EP19746430 A EP 19746430A EP 3807161 B1 EP3807161 B1 EP 3807161B1
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EP
European Patent Office
Prior art keywords
attachment
cover
closure system
opening
wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19746430.8A
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German (de)
English (en)
French (fr)
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EP3807161A1 (de
EP3807161C0 (de
Inventor
Roland Kittmann
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Individual
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Individual
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Publication of EP3807161C0 publication Critical patent/EP3807161C0/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
    • B65D43/0212—Removable lids or covers without integral tamper element secured by snapping over beads or projections only on the outside, or a part turned to the outside, of the mouth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00296—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00314—Combination, e.g. laminates, several different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/00351—Dome-like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/0037—Flexible or deformable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00527—NO contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • B65D2543/00546—NO contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00833—Integral tabs, tongues, handles or similar
    • B65D2543/00842—Integral tabs, tongues, handles or similar outside of the lid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00888—Means for facilitating removing of the closure by applying lever forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00888—Means for facilitating removing of the closure by applying lever forces
    • B65D2543/00898—Means for facilitating removing of the closure by applying lever forces by means of a coin or other tool in recesses or similar on container or lid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00925—Means for facilitating removing of the closure by applying inwardly directed pressure at two horizontally opposed points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00944—Located only on the container, e.g. recesses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00953—Sealing means
    • B65D2543/0099—Integral supplemental sealing lips

Definitions

  • Snap closures are characterized in that they can snap in a bistable manner between an open and a closed state. They generally consist of a disk-shaped end wall, which can be deformed in a bistable manner between a concave first and a convex second state, and an annular edge section whose outer circumference reduces as the end wall transitions from the first to the second state.
  • the edge section itself must be sufficiently stretchable in order to ensure an expansion of its outer circumference in the first bistable state of the end wall, which is curved in the insertion direction.
  • the entire cover can be made from one be made from a single plastic material with homogeneous density or stretchability.
  • the edge section is given the necessary stretchability by at least one stretching section in the edge section of the cover being made from a softer material component than the remaining edge section (see WO 2017/076398 A1 ).
  • the expansion section expands elastically under tension and allows the edge area to expand in the state of concave end wall curvature, while the base material of the cover is otherwise stiff enough to keep the angle in the transition area between the end wall and the edge section constant. This allows the cover to be folded into the bistable state with the larger outer circumference.
  • the expansion section is manufactured together with the rest of the cover in one piece in a multi-component injection molding process.
  • a second material component is then injected for the expansion section, which is softer and/or more elastic than the first material component used for the rest of the cover.
  • the cover in this transition area can preferably have a higher material thickness of the harder (base) material component than in the main area of the end wall or can be injection molded from an even harder third material component. This leads to the particular advantage that the cover has a constant material thickness overall. A homogeneous thickness is not only visually appealing, but also reduces the number of steps and edges in which dirt can collect.
  • a locking ring made of the softer second material component is molded onto the entire inner and/or outer circumference of the edge section. This can sealingly engage in a groove or a step in the side wall of the opening to be closed, so that a sealing closure of the opening is even possible.
  • the object of the present invention is to create a closure system consisting of a three-dimensional structure with the opening to be closed and with a cover that snaps between two states in a bistable manner, in which the options for triggering the snapping process are expanded for the user, and preferably the minimum effort required for triggering is reduced.
  • a locking system in which both bistable states can be triggered by manual pressure, so that both snapping processes can be triggered without a handle element and usually with one hand.
  • the three-dimensional structure in particular a container or a pipe end that is open at least on one side, is configured in such a way that a force acting on the closure system from the outside at at least one predefined point acts on the edge section of the cover in such a way is directed so that the cover snaps from one to the other bistable state.
  • the opening wall of the three-dimensional structure is so flexible, at least at the predefined location, that it passes on a force acting on the opening wall transversely to the insertion direction at least on one side and preferably on both sides to the edge section of the lid by elastic deformation.
  • the lid can lie completely within the opening to be closed without the user having to provide a handle element on the end wall of the lid to trigger the snapping process into the open position.
  • the point of the opening wall that is furthest away from the insertion direction protrudes a certain distance from the point at which the edge section of the cover presses against the wall section from the inside on the circumference. A force acting transversely to the insertion direction on this outermost wall section can then trigger the lid to snap over with less effort because the protrusion acts as a lever arm.
  • the cover acts as a cap from the outside around the wall section of the opening to be closed.
  • the geometric design according to the invention of the outermost end section of the opening wall in the opposite direction to the attachment direction makes it possible for the cap to contact this end section with an area of the end wall which is offset a little from the edge section in the direction of the center of the cap.
  • the cap can be brought into its closed position not only by a force acting on the edge section transversely to the insertion direction, but also by a force exerted in the insertion direction, provided that this force is exerted on a pressure point that is located radially further out than the contact point of the cap Opening wall with the front wall.
  • the distance between the contact point and the pressure point acts as a lever arm and reduces the amount of force required accordingly.
  • the closure element of the opening to be closed is generally referred to as a cover. If the clamp fastening of the cover engages the outside of the opening wall, the cover is referred to as a cap; However, if the cover clamps against the inside of the opening wall, it is referred to as a lid.
  • the cover according to the invention is designed as a cap 20, which is intended to encompass a container wall 12a from the outside.
  • the Figures 1a to 1f all show the cap 20 in its convex snap position, curved outwards (ie against the direction of insertion), which it assumes in its closed position.
  • the Figure 1f is also shown how in this position it is possible to snap into the opening wall 12a to be closed, but this will be explained later based on Figures 2a to 2e will be explained in more detail.
  • FIG. 1a shows a partially sectioned side view. In the left half of the figure the cap 20 can be seen from the side, while in the right half it is cut open on the inside so that the rear inside of the cap 20 can be seen.
  • the uncut soft component second material component
  • the cut soft component is shown cross-hatched
  • the cut hard component first material component
  • the cap material should have sufficient rigidity. This is achieved according to the invention in that the transition between the end wall 21 and the edge section 22 has a higher material thickness than the central region of the end wall 21, at least in some sections, but preferably over the entire circumference.
  • the material thickens as in the Figures 1e and 1f shown, upwards, ie against the direction of attachment, so that the transition area between the end wall 21 and the edge section 22 runs smoothly on the inside.
  • the material thickenings can also protrude downwards and lead to a correspondingly contoured wall inside the lid.
  • the softer material of the expansion sections 24 ensures that the edge section 22 can enlarge its outer circumference in the concave, ie open, snap position of the cap 20.
  • the expansion sections 24 would then no longer be in the Figures 1a and 1d have the constant width shown, but widen radially outwards.
  • the edge section 22 ends both in its expansion sections 24 and in its intermediate sections 23 in an internally circumferential locking ring 29, which is also formed from a softer material component, preferably the same as the expansion sections 24.
  • This internally circumferential locking ring 29 gives the thin-walled cap 20 additional dimensional stability, but is also sufficiently elastic to allow the enlargement of the outer circumference in the Fig. 2a to enable the convex folding position shown. Because of its softer material properties, the locking ring 29 can take on the function of a sealing ring.
  • the locking ring 29 is formed on a lip section 23a, 24a of the edge section 22 which projects radially inwards by 90°. This is because the cap 20 should encompass the opening 11a to be closed from the outside, as in the figure Figures 1f and in particular 2a-e will be explained in more detail.
  • the lip section 24a adjacent to the expansion section 24 is made of the softer second material component, while the lip section 23a adjacent to the intermediate section 23 is made of the harder first material component.
  • the lip sections 23a and 24a can also be formed completely from the softer second material component. Then the entire radially inwardly extending part of the edge section 22 would belong to the locking ring 29 or the lip section would be omitted.
  • the already mentioned multi-component injection molding from one or more thermoplastics is particularly suitable as a manufacturing process for the cap 20.
  • a first (basic) component can be injected for the end wall 21 and the intermediate sections 23, while the expansion sections 24 as well as the locking ring 29 are directly injection-molded from a softer second component in a single manufacturing process.
  • the optional third (particularly hard) material component for the transition area between the front wall and the edge section can also be injected directly in a single multi-component injection molding.
  • thermoplastic elastomers TPE
  • thermoplastic urethane TPU
  • Preferred materials for the second component are: polycarbonate (PC), acrylonitrile butadiene styrene (ABS) and polystyrene (PS).
  • Preferred materials for the third component are: glass fiber reinforced polyamide (PA) or other glass fiber reinforced plastics.
  • a previously separately manufactured blank can also be overmolded. It is conceivable, for example, that a cap made of sheet metal or a light metal (e.g. aluminum), which essentially has the shape of a conventional click-clack can cap with the spreading metal pinnacles, is overmolded in the edge area with the softer (second) plastic component. This results in a cover with significantly improved tightness against the escape of liquids or gases from the can to be closed with it.
  • a cap made of sheet metal or a light metal e.g. aluminum
  • the cap or lid can also be made from just one plastic material by thermal forming, i.e. deep drawing, or an injection molding process. Then, instead of the softer expansion sections, the folds mentioned are formed on the edge section and reinforcement ribs and/or material thickenings are provided at the transition area between the end wall and the edge section, which keep the internal angle there constant in both bistable states.
  • FIGS. 2a-e show the functional principle of the cap 20 according to the first inventive solution in a closure system according to the invention consisting of the container 10a and the cap 20.
  • the opening 11a to be closed has an annular groove 13a on the outside in the wall section 12a shown, at the lower end of which there is a shoulder 15a is formed, but is not necessary and can also be omitted.
  • the wall section 12a continues in a projection 14a, which has essentially the same height as the edge section 22 of the cap 20.
  • Fig. 2a shows the cap 20 in its open, concave position, ie with the end wall 21 curved downwards. It has a correspondingly enlarged inner diameter of the edge section 22. This inner diameter is larger than the outer diameter of the outer groove 13a, so that the cap 20 is in the open state the Figure 2a can be removed from the opening 11a.
  • the end wall 21 has a convex curvature, ie it is curved upwards in the opposite direction to the insertion direction.
  • the edge section 22 with the The inwardly projecting locking ring 29 then only has an inner diameter that is smaller than the outer diameter of the groove 13a.
  • the cap 20 is firmly in engagement with the opening wall 12a to be closed and only snaps back into its first bistable state, which is in the Figure 2a is shown. Because of the elastic material properties of the locking ring 29, it also functions as a sealing ring to prevent gases or liquids from escaping from the opening 11a.
  • the end section 16 of the wall region 12a is beveled, that is to say the outer circumference of the opening 11a narrows in this end section 16, while the inner diameter of the opening 11a remains constant.
  • a force F 2 acting essentially in the insertion direction is now exerted from above on the end wall 21 at a pressure point A2
  • this force F 2 acts on the edge section 22 via the lever arm of length a1 and allows the snapping process to be triggered. So far this has only been essentially transverse to the attachment direction using the in the Figures 2a, 2c and 2d force F 0 acting directly on the edge section 22 from the side is possible.
  • an extension 18 can additionally be attached or formed on the edge section 22 according to an optional variant.
  • This extension 18 allows the force F 0 , which acts essentially transversely to the insertion direction and is necessary to close the cap, to be reduced to a lower value F 1 because the user can exert his force via an extended lever arm when he holds the cap 20 on the Extension 18 compresses.
  • the lever arm a1 can be extended further in that the end section 16 'also has a narrowing 17 which is attached or formed on the end section 16' can be and in the area of the end section also narrows the inner diameter of the wall section 12a, i.e. the opening 11a. Then a force F 3 exerted on the pressure point A2 acts even more efficiently on the edge section 22 via the longer lever arm a2 with the contact point A1 as the lever point and thus makes it easier to trigger the snapping process.
  • the lever arm a1 can be used Figure 2c can also be extended with an end wall extension 19.
  • the end wall extension 19 is not arranged on the edge section 22 but on the end wall 21.
  • This end wall extension 19 can be attached or formed on the end wall 21 in sections or over the entire circumference and allows the force F 2 , which essentially acts in the insertion direction and is necessary to close the cap 20, to be reduced to a lower value F 3 . to reduce.
  • FIGS. 3a to 3d and 3f show the functionality of a closure system according to the invention, in which a cover 30 of the second solution is used to close an opening 11a.
  • the lid can be manufactured in the same way as described above for the cap 20 and has expansion sections and intermediate sections in the edge section 32 in the same way, although only the intermediate sections 33 can be seen in the cross sections of the figures for the sake of clarity.
  • the lip sections and their variants are also possible in the lid 30 in a similar way to the cap 20.
  • the cover 30 does not have an inwardly projecting locking ring 29, but rather an outwardly projecting locking ring 39, because it does not come from the outside, but from should clamp on the inside of the container wall.
  • a cover with both an outwardly and an inwardly projecting locking ring which can then be used both as a cap and as a lid.
  • the lid 30 could also be placed upside down on the can 10b without significantly changing its functionality. The middle section of the edge section 32 would then not extend in but against the insertion direction and the cover 30 would switch from its closed to its open state by pressing on the end wall 31 in the insertion direction, which can be advantageous for certain applications.
  • the edge section 32 therefore ends both in its expansion sections (not shown) and in its intermediate sections 33 in an externally circumferential locking ring 39, which is also formed from a softer material component, preferably the same as the expansion sections.
  • This circumferential locking ring 39 gives the thin-walled lid 30 additional dimensional stability, but is also sufficiently elastic to allow the enlargement of the outer circumference in the Fig. 3b to enable the convex folding position shown. Because of its softer material properties, the locking ring 39 not only clamps particularly well in the inner groove 13b of the opening wall 12b to be closed, but can even take on the function of a sealing ring.
  • the wall area 12b of the opening 11a to be closed has an annular groove 13b on the inside, into which the cover 30 is intended to snap, and which forms a step-shaped shoulder 15b on its lower edge.
  • the area of the wall section 12b above the groove 13b (that is, opposite to the insertion direction) is referred to as the projection 14b.
  • Locking rings 39 are effected in the groove 13b.
  • the locking ring 39 therefore presses when the end wall is in the concave position Figure 3b laterally from the inside into the annular groove 13b of the opening wall 12b and thus locks the lid 30 in its closed position.
  • the material in the expansion sections 34 stretches into a widened state in plan view and the outer diameter of the edge section 32 increases during this folding process.
  • the engagement of the locking ring 39 in the groove 13b is shown again in detail.
  • the cover 30 In order to expose the opening 11b again, the cover 30 must snap back into its original state. Then it can be pulled out of the opening 11b again due to the reduction in its outer diameter.
  • a handle element was conventionally provided on the end wall 31, by means of which the lid 30 can be grasped and pulled upwards.
  • the second inventive solution also enables the lid to be opened with a force F 4 , F 5 acting laterally (transversely to the insertion direction) on the container wall 12b, so that the handle element can be omitted.
  • the projection 14b has a length b1 up to the outermost end of the wall section 12b in the opposite direction to the attachment direction. If the user now exerts a force F 4 acting transversely to the insertion direction from the outside onto the wall section 12b at the pressure point B2, this acts with the length b1 as a lever arm and the contact point B1 between the wall section 12b and the edge section 32 due to the elastic deformation of the projection 14b on the lid 30 so that it can snap into the open state without the need for direct actuation of the edge section 32 or for the end wall 31 to be pulled up via a handle element or the like.
  • the Figure 3e shows an embodiment not according to the invention.
  • the wall section 12b has an opening below the inner groove 13b, in which a slide 13c is mounted.
  • the slider 13c is a rod-shaped actuating element that can be displaced transversely to the insertion direction in the opening for opening the lid 30. To do this, the user exerts a force F 5 'from the outside transverse to the insertion direction on the trigger 13d attached or formed on the outer end of the slider 13c.
  • the trigger 13d has the shape of a hemispherical actuation button.
  • the other end of the slide 13c meets the end of an edge section extension 34 which protrudes from the edge section 32 in the insertion direction in the interior of the container 10b.
  • the extension 34 can be attached or formed on the edge section 32 in sections or over the entire circumference. In the variant shown, it essentially has a length b3 and is therefore longer than the edge section 32 as such.
  • the extension 34 acts as a lever arm of length b3 up to the transition area between the edge section 32 and the end wall 31.
  • the extension 34 moves so far into the interior of the container that it applies the torque necessary for switching to the open bistable state to the end wall 31 via the lever arm b3 transmits.
  • the same force F 5 ' would not lead to the opening of the lid 30 on the remaining wall section 12b - for example because the wall thickness or strength of the container wall is large enough to transmit force to the edge section extension 34 to make it sufficiently difficult. This further increases safety against unintentional opening of the can-lid system.
  • the slide 13c with the trigger 13d can also be omitted and instead the wall section 12b has a constriction 13e at which the wall thickness is weakened.
  • the constriction 13e can be provided as a circumferential annular recess or only as grip recesses arranged in sections, preferably at two diametrically opposite locations.
  • the extension 34 deforms so far into the interior of the container that it applies the torque necessary for switching to the open bistable state to the end wall 31 via the lever arm b3
  • the container wall 12b is strong enough to avoid unintentional opening with the force F 5 ". This makes it possible to avoid impairment of the container tightness of the second variant with the wall opening and the slider 13c.
  • such wall breakthroughs are desirable for certain applications, for example for pressure equalization between the interior of the container and the ambient pressure.
  • the wall section 12b can also be made softer in another way at this point, for example by using a softer material component or subsequently softening the wall section 12b at this point.
  • the present invention relates to a closure system with a three-dimensional structure 10a, 10b, in particular a container or an opening area of a technical apparatus, and a cover 20, 30 for plugging onto the three-dimensional structure 10a, 10b in order to close its opening 11a, 11b.
  • the cover 20, 30 has an end wall 21, 31, which is deformable in a bistable manner between a first state curved in the insertion direction and a second state curved against the insertion direction, and an annular edge section 22, 32.
  • This has a larger outer circumference in the first bistable state than in the second bistable state and is therefore designed to effect a clamping fastening of the cover 20, 30 to a wall region 12a, 12b of the opening 11a, 11b by the edge section 22, 32 inside in the first state or outside in the second state against the wall region 12a, 12b presses.
  • the three-dimensional structure 10a, 10b is configured to transmit a force exerted from the outside on the closure system at predefined points A2, B2 in such a way that it causes the cover 20, 30 to snap over from one to the other of the two bistable states.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Packages (AREA)
EP19746430.8A 2018-06-29 2019-06-27 Behälter mit einem bistabilen deckel Active EP3807161B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202018103730.7U DE202018103730U1 (de) 2018-06-29 2018-06-29 Dose mit Schnappverschluss
PCT/DE2019/100598 WO2020001708A1 (de) 2018-06-29 2019-06-27 Dose mit schnappverschluss

Publications (3)

Publication Number Publication Date
EP3807161A1 EP3807161A1 (de) 2021-04-21
EP3807161B1 true EP3807161B1 (de) 2023-11-01
EP3807161C0 EP3807161C0 (de) 2023-11-01

Family

ID=67482895

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19746430.8A Active EP3807161B1 (de) 2018-06-29 2019-06-27 Behälter mit einem bistabilen deckel

Country Status (5)

Country Link
US (1) US20210122533A1 (ja)
EP (1) EP3807161B1 (ja)
JP (1) JP2021529134A (ja)
DE (2) DE202018103730U1 (ja)
WO (1) WO2020001708A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202019101663U1 (de) 2019-03-22 2020-06-23 Roland Kittmann Schnappverschluss mit Sicherheitsverriegelung
DE102020124654A1 (de) 2020-09-22 2022-03-24 Bayerische Motoren Werke Aktiengesellschaft Strukturbauteil
DE102020124796A1 (de) 2020-09-23 2022-03-24 Bayerische Motoren Werke Aktiengesellschaft Öffenbare Außenhaut

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR670576A (fr) * 1929-02-28 1929-11-30 Dispositif pour ouverture de boîtes et récipients, et boîtes et récipients comportant ce dispositif
DE20022999U1 (de) * 2000-02-18 2002-10-31 Artec Gmbh Entwicklungs Und Ko Kunststoffschachtel mit Zusatzfunktion
DE102015103036B4 (de) 2015-03-03 2017-08-31 Roland Kittmann Bistabiles Verschlusselement
DE202015105951U1 (de) 2015-11-06 2017-02-07 Roland Kittmann Schnappdeckel in Mehrkomponenten-Spritzgusstechnik

Also Published As

Publication number Publication date
EP3807161A1 (de) 2021-04-21
WO2020001708A1 (de) 2020-01-02
DE202018103730U1 (de) 2019-10-09
US20210122533A1 (en) 2021-04-29
EP3807161C0 (de) 2023-11-01
JP2021529134A (ja) 2021-10-28
DE112019003291A5 (de) 2021-04-08

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