MAGNETIC LOCKING DEVICE WITH SECURITY MECHANISM

Description

[0001] The proposed solution relates to a closure device for closing an opening formed between a first closing section and a second closing section.

[0002] The closing sections can be part of a storage device. A cavity in a hollow body of the storage device can then be closed via the opening closed by means of the closing device. Such a storage device is intended, for example, to hold an object, for example an electronic object such as a mobile phone, a camera of a tablet or laptop computer or the like, or another everyday object, for example a wallet or a means of payment such as a credit card. Such a storage device serves to hold and protect objects, in particular from moisture or dirt or other external influences. This is intended to enable the objects to be carried in difficult environments, for example during water sports, but also for example at work.

[0003] Such a hollow body then has a cavity, for example formed between a first wall and a second wall, in which the object to be accommodated in the storage device can be stored. To close the hollow body, the closure device is then provided, which comprises a first closure part and a second closure part. In one embodiment, the first closure part has a first strip body extending longitudinally along a transverse direction and is arranged on a first closing section of the first wall, and the second closure part has a second strip body extending longitudinally along the transverse direction and is arranged on a second closing section of the second wall.The first closure part and the second closure part interact in a magnetically attractive manner such that, in a closed position in which the hollow body is closed, the first closure section and the second closure section abut one another. Such a storage device is known, for example, from EP 2 571 391 B1.

[0004] US 2017 / 225842 A1 describes a closure device for closing an opening of a waterproof bag.

[0005] In this context, it is also known that the first and second closure parts, in a closed position of the closure device, form a closure assembly that can be adjusted from a release position into a closed position. In the release position of the closure assembly, the first and second closing sections can be separated from one another again as intended, counter to a magnetic force applied by the first and second closure parts, in order to release the opening. In the closed position, the closure assembly and a third closure part interact in a magnetically attractive manner such that the closure assembly is held in the closed position in which it is not possible to release the opening. The closure assembly must therefore first be adjusted from the closed position into the release position in order to release the opening again.The closure assembly is adjusted to the closed position, for example, by folding or rolling up the closure assembly at least once, so that the closure assembly is then held in a folded or rolled-up closed position with the aid of the third closure part.

[0006] Although the magnetic locking mechanism between the closure assembly and the third closure part effectively protects the closure device against unintentional opening by the user and ensures comparatively simple handling, such a closure device still requires further improvement. In particular, with regard to increased loads on the closure device, for example, due to increased internal pressure in a cavity closed by the closure device, (increased) shear forces can occur on the closure parts of the closure device, which may cause the closure assembly to become detached from the third closure part and / or the first and second closure sections to separate from each other.

[0007] In this respect, a closure device according to claim 1 represents an improvement over the solutions known from the prior art.

[0008] Accordingly, the proposed solution provides a closure device in which the closing sections can be adjusted into the closed position by folding or rolling at least once, and a securing mechanism secures the closure assembly against removal from the closed position thus assumed due to increased internal pressure in a hollow body closed by the closure device at the opening. Thus, a proposed closure device (in particular independent of a third closure part magnetically interacting with the closure assembly) has proven advantageous for securing a closed position assumed by folding or rolling at least once against unwanted opening when shear and / or lifting forces act on the first and second closure parts as a result of increased internal pressure on a hollow body closed by the closure device.Here, the additional securing mechanism can effectively counteract, in particular, shear forces which act in a central section of the strip bodies of the first and second closure parts in a direction perpendicular to a longitudinal extension direction of the strip bodies and / or lifting forces which act on the closure assembly at the longitudinal end and under the effect of which the closure parts tend to move away from one another.

[0009] According to the proposed solution, the closure device comprises at least one magnetic element, under the action of which at least one securing part of the securing mechanism is positioned in a securing position in which the at least one securing part can lock the closure assembly against removal from the third closure part via a positive fit. A corresponding magnetic element can also be formed here from magnetic material in the form of magnetic particles.

[0010] Alternatively, a magnetic element may comprise a permanent magnet arranged at a corresponding location on the closure device.

[0011] According to the proposed solution, the safety mechanism can therefore be arranged to be in the closed position to counteract a lifting force acting on the longitudinal end side of the first and second strip bodies and resulting from the increased internal pressure, under the effect of which opposite longitudinal ends of the first and second strip bodies tend to move away from each other, and / or to counteract a shear force resulting from the increased internal pressure, which acts in a central region of the first and second strip bodies on the closure device in a plane extending parallel to the first and second closing sections.

[0012] The securing mechanism can therefore be designed in particular to counteract a shear force acting between the first and second closure parts, between the closure assembly and a third closure part or between the closure assembly and a wall opposite which the closure assembly lies in the closed position.

[0013] The proposed solution is based on the basic idea of ​​additionally mechanically securing the locking assembly, with the locking sections abutting one another in the closed position, against displacement into the release position, at least as long as no user-applied release force acts on the locking assembly along a specific, predetermined direction of action. This can, in particular, prevent unintentional opening of the locking assembly. The additional locking mechanism can thus be manually actuated and thus released to return the locking assembly to the release position. However, without deliberate user release of the locking mechanism, the locking assembly remains locked against displacement into the release position.The first and second closure parts with their strip bodies thus provide a (possibly sealing) closure at the closure sections, which is mechanically secured by the locking mechanism. Removal from the closed position, against which mechanical protection is provided by the locking mechanism, is thus understood not only to mean accidental removal due to an active user attack on the closure device, but in particular (at least partial) removal from the closed position resulting from a load acting on the closure device that is not applied by the user.

[0014] In the closed position, the first and second closing sections can be folded or rolled up, in particular in that the first and second closing sections and thus walls comprising the closing sections are bent at least once by 180°, viewed along an extension path in cross section perpendicular to the transverse direction.

[0015] The strip bodies are arranged on the closing sections and thus act on the closing sections, wherein the closure parts interact in a magnetically attractive manner and the closing sections are thus held magnetically in contact with one another when the first and second closure parts are in their closed position.

[0016] To provide a magnetic interaction, the first strip body and / or the second strip body can each be formed from a magnetic material, for example by forming the strip bodies from a plastic material, in particular a polymer material, or a silicone material to which a magnetic material in the form of magnetic particles is added. Alternatively, the strip bodies can each accommodate a magnet arrangement made up of discrete magnetic elements, so that the strip bodies interact in a magnetically attractive manner through the interaction of the magnet arrangements. It is conceivable for each closure part to have a permanently magnetic effect, for example by forming the strip bodies with permanent magnetic particles and thus being made from a permanent magnetic material, or by the magnet arrangements of the closure parts each being formed from an arrangement of permanent magnets.Alternatively, it is also possible for one closure part to act as a permanent magnet and the other closure part to act as a ferromagnetic armature, for example by the ferromagnetic closure part consisting of a strip body made of a ferromagnetic material (for example a plastic material to which ferromagnetic particles are added) or having discrete ferromagnetic elements.

[0017] If a closure part has a magnet arrangement consisting of discrete magnetic elements, the discrete magnetic elements can, for example, be arranged linearly along the transverse direction, with the discrete magnetic elements being regularly spaced from one another along the transverse direction. However, it is also conceivable and possible to arrange the discrete magnetic elements in rows and columns using a two-dimensional matrix.

[0018] The locking device can additionally have a third locking part, with which the locking assembly interacts in a magnetically attractive manner in its locked position. The locking position can then be additionally mechanically secured via the locking mechanism, preventing inadvertent removal of the locking assembly from the third locking part.

[0019] In principle, however, the proposed solution is also advantageous without such a third closure part that interacts with the closure assembly in a magnetically attractive manner.

[0020] In principle, the third closure part can also have a third strip body extending along the transverse direction. For example, the third closure part is arranged on an offset section of a first wall that is different from the first closure section. In the closed position, the third closure part can, for example, interact with the first closure part in a magnetically attractive manner to hold the closure assembly in the closed position.

[0021] The third closure part can be arranged spatially offset from the first closure section perpendicular to the transverse direction. In such a variant, the third closure part is thus designed with its third strip body extending parallel to the first strip body of the first closure part, but offset transversely to the first closure part.

[0022] In the closed position, the third strip body and the first strip body can, for example, be positioned opposite each other with their surfaces facing each other. The closure parts interact magnetically, so that the first closure part is held in a defined positional relationship to the third closure part.

[0023] In one embodiment, the first strip body and / or the second strip body and / or a third strip body of a third closure part are elastically configured. A strip body can, for example, have increased rigidity compared to the walls of a hollow body in which the closure device is inserted, but is elastic enough to be bent, in particular about a vertical direction perpendicular to the transverse direction.

[0024] The securing mechanism can provide an additional connection between the closure assembly and a wall connected to the first closure section and / or between the closure assembly and the third closure part when the closure assembly is in the closed position. A connection between the closure assembly and the third closure part includes, for example, a connection between the first closure part and the third closure part or between the second closure part and the third closure part being provided via the securing mechanism in the closed position. The additional connection provided by the securing mechanism can be positive-locking and designed to absorb shear forces acting on the closure device.

[0025] For example, the securing mechanism comprises at least one securing part that secures the closure assembly against removal from the third closure part via a positive locking mechanism. In principle, the positive locking mechanism can already be present in the closed position of the closure assembly. However, a variant is also included in which a positive locking mechanism to secure the closure assembly against removal from the third closure part only occurs when a certain load acts on the closure device.

[0026] In a further development, the securing mechanism comprises at least two securing parts that interact with each other in a form-fitting manner when the closure collar is in the closed position, in order to secure the closure assembly against removal from the third closure part. These at least two securing parts can also engage each other in a form-fitting manner as soon as the closure assembly reaches the closed position, or alternatively, they can at least be brought into a relative position in which the positive engagement of the two securing parts is automatically realized when a load is applied to the closure device.

[0027] In a further development based on this, a first securing part and a second securing part are provided, wherein the first securing part is configured to engage behind the second securing part in order to secure the closure assembly against removal from the third closure part. By means of a corresponding engagement behind and thus an undercut formed on the securing mechanism, on the one hand, an effective positive locking of the two securing parts to one another can be ensured. On the other hand, this also makes it comparatively easy to ensure that the securing parts can only be disengaged again by a targeted release movement. Inadvertent separation of the securing parts, in particular when the closure device is under load, is thus ruled out.

[0028] In principle, a safety part of the safety mechanism can also be formed on one of the locking parts. Alternatively or additionally, a safety part can be formed by a component of the locking device that is separate from a locking part.

[0029] In a locking position in which a locking part of the locking mechanism is positioned under the action of at least one magnetic element, the locking part can already be in positive engagement to secure the locking assembly against displacement into the release position. However, it can also be provided that the locking part is still in an intermediate position in its locking position, from which the locking part is only displaced into an engaged position under the action of additional load on the locking device, in which the locking positive engagement then exists.

[0030] A further embodiment provides that the at least one securing part is moved into the securing position under the action of the at least one magnetic element when the closure assembly is transferred into its closed position. The at least one magnetic element thus ensures that the at least one securing part is in its securing position when the closure assembly reaches the closed position.

[0031] In an alternative embodiment, the at least one locking element can only be adjusted after the locking assembly has been transferred into its locking position and thus subsequently toward the locking position. This subsequent adjustment can then be assisted by the at least one magnetic element—at least in the final part of the adjustment path before reaching the locking position—in order to support the assumption of a predetermined position by the at least one locking element in the locking position through magnetic attraction.

[0032] In principle, an additional positive locking element can be provided between the closure assembly and a wall to which the first locking section is connected in order to secure the engaged position. For example, one embodiment provides at least one positive locking element on the closure assembly side, e.g., in the form of a locking lug or a locking web, which engages in a locking opening on the wall side when the securing part is in the engaged position.

[0033] In one embodiment, an additional securing element is provided on the closure assembly, to which at least one securing part of the securing mechanism is fixed at a distance from the first and second closure parts. The securing element has, for example, a flexible or rigid carrier body to which the at least one securing part is fixed. For example, the securing part is provided offset from the first and second closure parts in a spatial direction that runs transversely to the direction of extension of the strip bodies of the first and second closure parts. The securing part provided on the additional securing element can thus provide mechanical locking of the closure assembly in the closed position at a distance from the first and second closure parts and, if appropriate, also at a distance from the third closure part.This includes, for example, with reference to a variant already discussed above, that the securing part provided on the additional securing element forms a first securing part, which, in the closed position of the closure assembly, is positively connected to a second securing part, which is provided on a wall connected to the first closing section and, in particular, is fixed thereto. The first and second securing parts can, in particular, be part of a magnetic closure, by means of which the closure assembly is additionally secured in its closed position against displacement into the release position.

[0034] In one embodiment, the securing mechanism comprises at least one securing part which, after the closure assembly has been transferred into its closed position, can be adjusted by pivoting about at least one hinge axis into a securing position securing the closure assembly. In the securing position, the at least one securing part therefore secures the closure assembly in its closed position against removal from the third closure part. In this embodiment, pivoting of the securing part about its hinge axis into its securing position can be provided after the closure assembly has been adjusted to the closed position. In this embodiment, the at least one securing part is then subsequently pivoted into its securing position by the user in a targeted manner, for example, to additionally secure the closure assembly.

[0035] The hinge axis can be defined, for example, by a hinge via which the at least one securing part is hinged to the closure assembly, to a third closure part of the closure device, or to a wall connected to the first or second closure section. In the latter case, the securing part can thus be hinged to a front, first, or rear, second wall along a viewing direction (perpendicular to the longitudinal extension of the first and second strip bodies) of the closure assembly in its closed position.

[0036] For example, the hinge axis is defined by a film hinge or a film. A film hinge or a film can be used to provide a pivotable securing part on the closure device at a relatively low cost. For example, the film defining the hinge axis can be a section of a wall to which one of the closure sections is connected.

[0037] To keep the closure device as compact as possible, one embodiment provides for the at least one securing part to be connected to the third closure part via the film hinge. The at least one securing part is then hinged to the third closure part via the film hinge and therefore does not need to be provided on a separate component.

[0038] In one embodiment, a positive-locking connection, which in particular absorbs shear forces and / or lifting forces, is provided between the closure assembly in the closed position and the third closure part via the at least one securing part in its secured position. For example, the securing part can also be pivoted into its secured position relative to a third strip body of the third closure part via the film hinge and then connected to the closure assembly in a positive-locking manner after the closure assembly has assumed the closed position. The securing part can be provided at a longitudinal end of the third strip body via the film hinge. For example, the securing part is designed in the shape of a tab, in particular in the shape of a strip.

[0039] For a positive connection via the securing part in the securing position pivoted about the joint axis, at least one securing part can be provided with at least one receptacle into which a further securing part of the securing mechanism engages in a positive fit when in the securing position. For example, an opening is provided for this purpose on the securing part into which a protruding pin or web of the further securing part engages when in the securing position. Alternatively or additionally, at least one positive locking element can be provided on the at least one securing part, which engages in a positive fit in a receptacle of a further securing part of the securing mechanism when in the securing position. A corresponding positive locking element can then also be formed here by a pin or web that is inserted into a corresponding receptacle of a further securing part.A further securing part mentioned above can be formed in particular on a closure part of the closure assembly, for example on the first closure part.

[0040] Alternatively or additionally, the securing mechanism can comprise at least one securing part for the targeted mechanical securing of longitudinal ends of the closure assembly (relative to a longitudinal direction of the strip bodies and thus to the transverse direction) to a wall or to a third closure part. Such a longitudinal end-side securing device primarily counteracts vertical lifting and, if necessary, also shearing. A securing part that can be used for this purpose includes, for example, in particular a hinged securing part as already mentioned above. However, this also includes an alternative design variant in which, for example, a securing part is formed with a hook-and-loop fastener, an O-ring, or a sleeve slipped over a longitudinal end.

[0041] As already mentioned above, the closure assembly with the first and second closure parts in the closed position can be transferred from the release position into the closed position by pivoting the closure assembly about a pivot axis parallel to a first spatial direction (e.g., relative to a Cartesian coordinate system of the x-direction). The closure assembly is consequently folded about the pivot axis parallel to the first spatial direction, for example, by approximately 180°. A (resulting) magnetic force for holding the closure assembly in its closed position with respect to the third closure part then acts along a spatial axis parallel to a second spatial direction (y) running perpendicular to the first spatial direction. In such a variant, the locking mechanism secures the closure assembly against shear force-induced removal from the third closure part, i.e., against removal due to a shear force directed in a third spatial direction (-z), which is perpendicular to both the first spatial direction (x) and the second spatial direction (y). Consequently, if a shear force directed in the third spatial direction acts on the closure assembly, the closure assembly is secured by the locking mechanism against displacement in this spatial direction and thus against displacement into the release position.

[0042] For example, the locking assembly can be folded from the release position into the closed position, in which the locking assembly is then secured by the locking mechanism against displacement relative to the third locking part beyond a permitted extent along the third spatial direction and thus also against folding back. This third spatial direction is directly opposite to a directional component along which the locking assembly is folded into the closed position. In this way, the locking mechanism can also prevent the locking assembly from lifting off or shearing off the third locking part as a result of a load applied to the locking device, for example a load resulting from increased internal pressure in a cavity closed by the locking device.

[0043] One embodiment provides that a locking element, which locks the locking assembly against displacement along the third spatial direction, is initially in an intermediate position when the locking assembly reaches the locked position and can only then be moved into an engaged position. In this case, it can be provided that the locking element of the locking mechanism is (only) positioned in the intermediate position by magnetic attraction when the locking assembly is transferred to its locked position.

[0044] In one variant, alternatively or additionally, the shift into the engaged position, in which, for example, one locking part engages behind another locking part of the locking mechanism, can be assisted by at least one (additional) magnetic element. Thus, at least one magnetic element can be provided, under the action of which the at least one locking part is moved from the intermediate position into the engaged position. Once the locking assembly has assumed its closed position and the locking part is thus in the intermediate position, a magnetic force assists the further movement of the locking part into the engaged position.

[0045] The magnetically assisted adjustment from the intermediate position to the engaged position can also include a magnet arrangement of the locking mechanism predetermining a bistable state for the position of the locking element when the locking assembly is in its locked position. The locking element is then initially held in the intermediate position by the magnet arrangement. However, if a load then acts on the locking device that would displace the locking assembly toward the release position, a resulting slight displacement of the locking element leads to a change in the magnetic elements acting in an attractive manner and, associated with this, a magnetically assisted displacement of the locking element into the engaged position.This includes, in particular, that the securing mechanism is designed to allow a slight displacement movement of the securing part in the direction of action of the shear force under the effect of a shear force acting on the closure assembly, which then leads to the magnetically assisted displacement of the securing part into the engagement position.

[0046] Regardless of whether the securing part is displaced from the intermediate position into the engaged position with magnetic assistance, a variant embodiment can provide that the at least one securing part can be displaced from the intermediate position into the engaged position under the effect of an increased internal pressure in a cavity accessible via the opening. The securing mechanism is therefore designed such that the securing part automatically moves into the engaged position when an increased internal pressure, i.e., one that exceeds a threshold value, acts in the cavity. Such a variant is particularly advantageous if a cavity in a liquid container with flexible walls is to be closed via the closure device.After liquid has been poured into the cavity, particularly during transport or loading, the internal pressure can increase to such an extent that the securing part on the securing mechanism of the closure device automatically moves from the intermediate position to the engaged position. With such a design variant of the proposed closure device, a closed position of the closure assembly is therefore automatically secured, i.e., without the user having to intervene on the securing mechanism, additionally mechanically against adjustment to the release position. Once the load on the liquid container is removed, the securing part can then automatically return to the intermediate position, which in turn facilitates the release of the securing mechanism and thus the opening of the closure device.For a user, the additional mechanical securing of the locking position provided by the safety mechanism therefore has no disruptive influence on the opening of the locking device.

[0047] The proposed solution is therefore particularly advantageous for use with a liquid container, for example, a drinking bladder. Using a variant of a proposed closure device, a hollow body of the liquid container intended to hold liquid can be closed at an opening through which—when the closure device is open—liquid can be poured into the hollow body. A locking mechanism of the closure device can, in particular, counteract the removal of the closure assembly from the third closure part due to increased internal pressure in the hollow body at least partially filled with liquid.

[0048] In this context, it can be provided, in particular, that the hollow body is bordered by at least one flexible wall, to which a closing section of the closure device is connected. The introduction of liquid into the hollow body, but also external pressure applied to a flexible wall in a hollow body at least partially filled with liquid, can result in significant shear forces acting on the closure parts of the closure device closing the opening. The additionally provided safety mechanism then ensures that such shear forces do not lead to an undesired opening of the closure device.

[0049] The proposed solution further comprises a drinking bladder with a proposed closure device in which a hollow body intended to hold liquid is bordered by flexible walls and the closure parts of the closure device are provided on correspondingly flexible closing sections connected to an associated wall.

[0050] In one embodiment, the first strip body of the first closure part is then enclosed, for example, between an inner layer and an outer layer of a first wall, which borders a cavity of the hollow body to be closed by the closure device. Additionally or alternatively, the second strip body of the second closure part can be enclosed between an inner layer and an outer layer of a second wall of the hollow body. The respective strip body, which can be designed as a solid strip-shaped band, is thus located in an intermediate layer between the inner layer and the outer layer and is thus enclosed between the layers and thus covered on the inside by the inner layer and on the outside by the outer layer.

[0051] In one embodiment, the first closing section is formed by the inner layer of the first wall, and the second closing section is formed by the inner layer of the second wall. The closing section of the respective wall is thus integrally formed on the inner layer of the respective wall. In the closed position, the closing sections lie flat against one another and create a sealed closure, so that the hollow body is sealed to the outside, in particular so fluid-tight that no moisture can penetrate into the interior of the hollow body.

[0052] In one embodiment, the first wall and / or the second wall are flexible. In particular, both the first wall and the second wall can be flexible and pliable, so that the hollow body can be deformed in a flexible, easily moldable manner and can thus adapt its shape to accommodate an object. The walls thus design the hollow body in the manner of a bag in that an object, in particular an electronic object such as a mobile phone or another everyday object, can be received and enclosed in a protective manner. Alternatively, the hollow body can be designed to hold a liquid and thus, for example, as part of a drinking bladder.

[0053] In principle, the first and second walls, to which the first and second closing sections of a proposed closure device are connected, can be part of a continuous wall element. The first and second walls can thus be formed in particular as a single piece. For example, the first and second walls, which are opposite one another in a cross-sectional view, can be formed by a single, one-piece wall element in the form of a blow-molded part.

[0054] The attached figures illustrate possible embodiments of the proposed solution.

[0055] Here we show: Fig. 1 is a view of a storage device with a hollow body and a closure device according to an embodiment; Fig. 2 is an exploded view of the arrangement according to Fig. 1 ; Fig. 3A a frontal view of the storage device; Fig. 3B a sectional view along the line AA according to Fig. 3A ; Fig. 3C an enlarged view in section B according to Fig. 3B ; Fig. 4 a view of a storage device with a hollow body and a closure device according to a further embodiment; Fig. 5 an exploded view of the arrangement according to Fig. 4 ; Fig. 6A a frontal view of the storage device; Fig. 6B a sectional view along the line CC according to Fig. 6A ; Fig. 6C an enlarged view in section C according to Fig. 6B ; Fig. 7 a view of a storage device with a hollow body and a closure device according to yet another embodiment; Fig. 8 an exploded view of the arrangement according to Fig. 7 ; Fig. 9A a frontal view of the storage device; Fig. 9B a sectional view along the line AA according to Fig. 9A ; Fig. 9C an enlarged view in section B according to Fig. 9B ; Fig. 10A-10B a further development of the Fig. 1 to 9Cshown storage device, on which a proposed securing mechanism is additionally provided, which is shown in two different positions; Fig. 11A-11B a further embodiment variant with an additional securing mechanism, which here has two strip-shaped securing tabs, which in the Fig. 11A folded down and in the Fig. 11B are pivoted into a securing position; Fig. 12 in section and with the Fig. 3C a further embodiment variant in which a safety mechanism is provided with two safety parts that engage behind each other in the case of load; Fig. 13in with the Fig. 12 consistent view, a further development in which reaching a desired position of a securing part of the securing mechanism is magnetically supported; Fig. 14in with the Fig. 12a corresponding view of a further development in which an additional mechanical security is provided via a projecting security bar; Fig. 15 in front view of a further embodiment of a proposed storage device in the form of a drinking bladder with an embodiment of a proposed closure device; Fig. 15A a sectional view according to the section line AA of Fig. 15 ; Fig. 16A-16C each in an enlarged view of section C according to Figure 15A a further development of the closure device in different phases during closing and opening, in which a securing part of the closure assembly is displaced into an engagement position by magnetic force when the closure assembly assumes a closed position, and the engagement position is defined by an additional form-locking element on the closure assembly side; Fig. 17A-17B with the Fig. 16A to 16Cmatching views a further embodiment variant in different phases when closing the closure device; Fig.18A-18Bin with the Figures 17A and 17B Consistent views show a further embodiment variant in which a locking component on the locking composite side is provided on the first locking component.

[0056] The Figures 1-9c are not within the scope of the claims.

[0057] Fig. 1 to 3A-3Cshow views of a first embodiment of a storage device 1, which has a hollow body 10 bordered by walls 100, 101 and is designed to accommodate an object, in particular an electronic object such as a mobile phone or another everyday object, for example a wallet or a means of payment. The storage device 1 can also be a liquid container, such as a drinking bladder. A liquid is then held in the hollow body 10, which can flow out via an outlet 10A provided on the hollow body 10, e.g. into a drinking tube connected thereto.

[0058] The walls 100, 101 are connected to one another along a transverse direction x, parallel side edges, and along a lower edge along a vertical direction z, for example by welding, and are to be closed in the region of an upper end by a closure device 2 such that an inner volume of the hollow body 10 or a cavity defined thereby is sealed in a closed position of the storage device 1. As can be seen from the sectional view according to Fig. 3C As can be seen, each wall 100, 101 is formed by two layers 106, 107, of which an inner layer 106 points towards the inner volume of the hollow body 10 and an outer layer 107 points outwards.

[0059] The walls 100, 101 are designed to be flexible, so that the hollow body 10 can be flexibly deformed, in particular in order to flexibly accommodate an object therein or to be able to expand when a liquid is absorbed in the hollow body 10.

[0060] The closure device 2 has three closure parts 20, 21, 22. Of these closure parts 20, 21, 22, a first closure part 21 is arranged on a closure section 104 of the first wall 100, while a second closure part 20 is arranged on a closure section 105 of the second wall 101 such that the closure parts 20, 21 extend along the vertical direction z at the same height on the respectively associated wall 100, 101. The closure parts 20, 21 interact in a magnetically attractive manner, so that in the closed position of the closure device 2, the closure sections 104, 105, which are each formed by the inner layer 106 of the associated wall 100, 101, lie flat against one another and thus form a sealing connection, forming a closure assembly 2V.

[0061] A third closure part 22 is arranged on a section 102 of the first wall 100 which is offset from the closing section 104 of the first wall 100 and, viewed along an extension path starting from the closing section 104 in cross section according to Fig. 3C , arranged transversely offset to the first closure part 21.

[0062] The closure parts 20, 21, 22 each have a strip body 202, 212, 222 which is longitudinally extended along the transverse direction x and thus extends transversely to the vertical direction z.

[0063] The closure parts 20, 21, 22 are designed to interact in a magnetically attractive manner. In the illustrated embodiment, the strip bodies 202, 212, 222 are each formed from a magnetically acting material, for example, by making the strip bodies 202, 212, 222 from a plastic material or a silicone material in which magnetically active particles are embedded.

[0064] The strip bodies 202, 212, 222 can each act as a permanent magnet and then point towards each other in pairs with opposite poles in such a way that the strip bodies 202, 212, 222 are in the Fig. 3C magnetically attract each other in the sequence shown. Alternatively, for example, only the strip body 212 of the first closure part 21 can act as a permanent magnet, while the other strip bodies 202, 222 are ferromagnetic, so that the associated closure parts 20, 22 act as a magnetic armature. It is also conceivable, for example, that the closure parts 20, 21 are permanently magnetic on their strip bodies 202, 212, while the strip body 222 of the third closure part 22 is ferromagnetic.

[0065] For example, Fig. 3CAs can be seen, the strip bodies 202, 212, 222 are enclosed between the inner layer 106 and the outer layer 107 of the respective associated wall 100, 101. Thus, the strip bodies 212, 222 of the closure parts 21, 22 are enclosed between the inner layer 106 and the outer layer 107 of the first wall 100, while the strip body 202 of the closure part 20 is enclosed between the inner layer 106 and the outer layer 107 of the second wall 101.

[0066] By means of the first closure part 21 and the second closure part 20, the closure sections 104, 105 are pressed flat against one another in such a way that the closure sections 104, 105 formed by the inner layers 106 of the walls 100, 101 abut one another like membranes and thus seal the hollow body 10. By means of the third closure part 22, the closure assembly 2V formed by the closure parts 20, 21 is held in a defined closed position, whereby a folding of the walls 100, 101 by 180° is effected in a region between the closure sections 104, 105 and sections 102, 103 offset transversely to the closure sections 104, 105, as can be seen from Fig. 3C This further improves the tightness of the closure device 2 in the closed position.

[0067] The first closure part 21 and the second closure part 20 each have a gripping element 200, 210 that a user can grasp. By acting on the closure parts 20, 21, the closure parts 20, 21 can be released, in particular, from the further, third closure part 22 and moved into a release position. In this release position, the closure parts 20, 21 can be moved away from one another along an opening direction y, which is directed perpendicular to the transverse direction x and the vertical direction z, and thus the closing sections 104, 105 can be separated from one another, so that the interior of the hollow body 10 is accessible through the opening thus released.

[0068] In a Fig. 4 to 6A-6CIn the illustrated embodiment, the strip bodies 202, 212, 222 are not made entirely of a magnetic material, but each have an arrangement of receiving openings 201, 211, 221, in which discrete magnetic elements of a respective magnet arrangement 23, 24, 25 are received. The discrete magnetic elements are arranged in a row along the transverse direction X and thus form a linear array of magnetic elements, wherein the magnet arrangements 23, 24, 25 of the different closure parts 20, 21, 22 interact in a magnetically attractive manner in the closed position and thus sealingly close the hollow body 10 via the closing sections 104, 105.

[0069] The discrete magnetic elements of the magnet arrangements 23, 24, 25 can each be formed by discrete permanent magnets, for example, made of a neodymium material. However, it is also conceivable that only one magnet arrangement 23, 24, 25 or two of the magnet arrangements 23, 24, 25 have discrete permanent magnets, while the other magnet arrangements 23, 24, 25 are formed by discrete ferromagnetic elements.

[0070] Otherwise, the embodiment is as per Fig. 4 to 6A-6C functionally equivalent to the embodiment according to Fig. 1 to 3A-3C , in particular with regard to the manufacture of parts of the storage device 1 from a material containing an antimicrobially effective additive, so that reference should be made in full to the preceding explanations in this regard.

[0071] The embodiment according to Fig. 7 to 9A-9C corresponds to the embodiment according to Fig. 4 to 6A-6C, in which case no third closure part 22, as in the embodiment according to Fig. 4 to 6A-6C , and the closure device 2 is thus formed by only two closure parts 20, 21. Otherwise, the storage device 1 is functionally identical to the storage device 1 according to Fig. 4 to 6A-6C .

[0072] The Fig. 10A to 18Bshow embodiments of the proposed solution in which the closure device 2 is further developed with a securing mechanism S. The closed position of the closure assembly 2V is additionally mechanically secured via this securing mechanism S. In this case, the securing mechanism S is particularly designed to absorb shear forces (in the xz plane or in the vertical direction z, -z) and / or lifting forces (in the spatial direction y) which act as a result of an increased internal pressure in the hollow body 10, for example due to a liquid accommodated therein. Under the effect of these shear forces, there is otherwise an increased risk that the closure assembly 2V will be removed from the third closure part 22 and folded about the spatial axis parallel to the x direction (upwards) into the release position and that the two closure parts 20 and 21 will also be separated from each other.

[0073] In the version of the Fig. 10A and 10BAn additional securing element in the form of a securing tab 3 is arranged on the closure assembly 2V. This securing tab 3 is fixed to the second closure part 20 and forms a carrier body for a pair of first securing parts 3.1, 3.2. The first securing parts 3.1 and 3.2 protrude from an inner side 31 of the securing tab 3 with a securing pin and, in the closed position of the closure assembly 2V, are completely covered by an outer side 30 of the securing tab 3.

[0074] If the locking assembly 2V is moved into its locking position according to the Fig. 10BWhen folded, the first securing parts 3.1, 3.2 automatically engage in a form-fitting manner with second securing parts 4.1 and 4.2 of the securing mechanism S arranged on the wall 100. On the second securing parts 4.1 and 4.2, which are arranged at a distance from the third closure part 22 in the z-direction, engagement openings 41 and 42 are formed, into which the securing pins of the first securing parts 3.1 and 3.2 each engage. In the present case, a magnet arrangement is provided in each pair of first and second securing parts 3.1 / 4.1, 3.2 / 4.2 such that the first securing parts 3.1 or 3.2 are each magnetically assisted to move into a positive locking position on the respective second securing part 4.1 or 4.2 when the first securing part 3.1, 3.2 has been sufficiently brought close to the associated second securing channel 4.1, 4.2 upon folding over the closure assembly 2V and thus to the securing tab 3. The respective first securing part 3.1, 3.2 is displaced into the intended locking position under the action of the respective magnet arrangement along an insertion gap 410 or 420, which is provided at the engagement opening 41, 42 of its associated second securing part 4.1 or 4.2 and extends radially with respect to the engagement opening 41 or 42. A pair of securing parts 3.1 / 4.1, 3.2 / 4.2 thus each forms a magnetically assisted closure.

[0075] If the closure assembly 2V is in the intended closed position with respect to the third closure part 22, the closure assembly 2 is additionally mechanically secured against folding back into the release position by the securing mechanism S and the interlocking securing parts 3.1 / 4.1, 3.2 / 4.2. To release the securing mechanism S, a user must specifically apply a release force FL to the securing tab 3 in order to disengage the first and second securing parts 3.1 / 4.1, 3.2 / 4.2. The release force FL must be applied in order to displace the first securing parts 3.1, 3.2, which are fixed to the securing tab 3, along the respective insertion gap 410 or 420 out of an engagement opening 41 and 42 of the associated wall-side second securing part 4.1 and 4.2.In the illustrated embodiment, the insertion gaps 410 and 420 extend parallel to each other in the z-direction, so that the release force FL must be applied to the securing tab 3 along the z-direction.

[0076] Alternatively, however, a different orientation of the insertion gaps 410, 420 is of course also possible. In particular, it is conceivable that the insertion gaps 410, 420 are each open in the transverse direction x, and thus the securing tab 3 must first be displaced transversely before the closure assembly 2V can be folded back and thus (completely) removed from the third closure part 22.

[0077] In the version of the Fig. 11A and 11BThe securing mechanism S has two securing parts in the form of narrow, strip-shaped securing tabs 223A, 22B, which are each provided via a film hinge 222A or 222B at a respective longitudinal end of the third strip body 222 of the third closure part 22. The securing tabs 223A and 223B are thus each attached to the strip body 222 of the third closure part 22 via a film hinge 222A or 222B.

[0078] In addition, additional securing parts of the securing mechanism S in the form of securing pins 204A and 204B are formed on the second strip body 202 of the second closure part 20. The securing pins 204A and 204B protrude from the strip body 202 in the y-direction when the closure assembly 2V is in its closed position relative to the third closure part 22. The securing tabs 223A and 223B each have (shear force) receptacles 224A and 224B formed in the form of through-openings, which can be positively engaged with an associated securing pin 204A or 204B by folding the securing tabs 223A and 223B around a joint axis defined by the respective film hinge 222A and 222B and extending parallel to the z-direction.

[0079] The securing pins 204A and 204B are each provided at a distance from a longitudinal end of the strip body 202, so that a securing tab 223A or 223B always encompasses at least one end of the strip body 202 when its receptacle 224A or 224B is engaged with the associated securing pin 204A or 204B. A flat section of the respective securing tab 223A or 223B is thus directly opposite a section of the strip body 202.

[0080] In order to do so in the thus defined and in the Fig. 11BIn order to support the positive connection between the securing tabs 223A, 223B of the third closure part 22 and the second closure part 20 of the closure assembly 2V, a magnet arrangement with magnet elements 205A, 205B on the closure assembly 2V and magnet elements 225A, 225B on the securing tabs 223A, 223B can be provided. The magnet elements 205A, 205B of the closure assembly 2V, which are shown in the Fig. 11A are arranged, for example, on the second strip body 202 of the second closure part 20, interact in a magnetically attractive manner with the magnetic elements 225A and 225B of the securing tabs 223A or 223B. This supports the engagement of the folded securing tabs 223A, 223B on the strip body 202 and the engagement of a respective securing pin 204A, 204B on the strip body side into a tab-side receptacle 224A or 224B.

[0081] The safety tabs 223A and 223B of the safety mechanism S, which are each hinged on one side to the third closure part 22, in the variant of the Fig. 11A and 11B In particular, a lifting of the closure assembly 2V from the third closure part 22 or the longitudinal ends of the strip bodies of the closure parts 20, 21, 22 from each other (in the spatial direction y) under the effect of an increased internal pressure in the hollow body 10 and thus an undesired opening of the closure device 2 in a liquid-filled cavity 10 is counteracted. The embodiment variant of the Fig. 11A and 11B is therefore particularly suitable for using the storage device 1 as a drinking bladder.

[0082] In the design variants of the Figures 12, 13 and 14 the closure device 2 is shown in a sectional view corresponding to the Figure 3C In each of the Figures 12, 13 and 14In the embodiments shown, the closure device 2 is again designed with an additional securing mechanism S. This securing mechanism S again counteracts a removal of the closure assembly 2V present in the closed position from the third closure part 22 and thus in particular a shearing off of the third closure part 22 and possibly a separation of the two closed positions 104 and 105 from one another by a defined positive connection - here between the closure assembly 2V and the third closure part 22.In this case, however, the securing mechanism S is designed in such a way that by pulling on the closure assembly 2V along the spatial direction y with a release force FL - at least in an unloaded state of the closure device 2 - the closure assembly 2V can be easily removed by a user from the third closure part 22 and folded back into the release position (upwards), for example if liquid is to be refilled into the hollow body 10 via the opening between the closing sections 104 and 105.

[0083] In the version of the Figure 12The securing mechanism S has a first securing part in the form of a securing hook 216 on the first closure part 21. In the closed position of the closure assembly 2V, the securing hook 216 protrudes in the -y direction on the first closure part 21 toward the (first) wall 100. For example, the securing hook 216 is formed on the handle element 210 for this purpose.

[0084] In the closed position of the locking assembly 2V, the securing hook 216 lies opposite a securing recess 226 of a second securing part of the securing mechanism S, which is formed by the third locking part 22. The securing recess 226 is open in the z-direction, so that securing hooks 216 projecting in the y-direction on the first locking part 21 can engage positively in the securing recess 226 with a hook end projecting in the z-direction and thus locally engage behind the third locking part 22.

[0085] In the closed position of the closure assembly 2V, the securing hook 216 is initially in an intermediate position in which the securing hook 216 does not (yet) engage with its hook end in the securing recess 226. However, the securing hook 216 is located opposite the securing recess 226 in the intermediate position in such a way that when a load is applied to the closure device 2 due to an increased internal pressure in the hollow body 10 and a resulting pressure or shear force component FD acting in the -z direction on the closure assembly 2V, the securing hook 216 is brought into positive engagement with the securing recess 226.Under the effect of the increased internal pressure, the securing hook 216 is thus displaced into an engaged position in which the securing hook 216 engages behind a section of a second securing part formed by the third closure part 22 and thus blocks the closure assembly 2V against removal from the third closure part 22. The closure assembly 2V is thus also protected against folding over (in the . Figure 12 clockwise) around the spatial axis parallel to the spatial direction -x in the release position.

[0086] In the further training of Figure 13A positioning section 227 projecting in the y-direction is provided on the wall 100 opposite the safety recess 226. This wall-side positioning section 227 carries a magnetic element 227M, which interacts in a magnetically attractive manner with a magnetic element 210M of the first closure part 21. The closure-part-side magnetic element 210M is, in this case, integrated, by way of example, into the handle element 210. The magnetic attraction force between the magnetic elements 210M and 227M ensures the proper positioning of the safety hook 216 with respect to the safety recess 226 when the closure assembly 2V is folded into its closed position.In this way, it can be ensured in particular that the safety hook 216 engages, as desired, in an engagement opening 2260 formed between the safety recess 226 and the positioning pin 227 when the closure assembly 2V is folded over into its closed position and is opposite the safety recess 226 as intended in such a way that a positive, locking engagement of the safety hook 216 in the safety recess 226 is possible.

[0087] The magnetic elements 227M and 210M can also assist the securing hook 216 in assuming the engagement position. Thus, the magnetic elements 227M and 210M can interact in such a way that the securing hook 216 can be released from the Figure 13shown intermediate position is automatically shifted into the engaged position or at least a corresponding adjustment into the engaged position is supported. If the securing hook 216 thus engages in the engagement opening 2260 as intended when the closure assembly 2V is folded into the closed position, the securing hook 216 is driven further into the engaged position under the action of the magnetic elements 227M and 210M. In the engaged position, the securing hook 216 then engages behind the third closure part 22. In the thus defined securing position, a positive locking engagement between the closure assembly and the third closure part 22 is already provided, which in the securing position of the embodiment variant of the Figures 12 is only created by loading the locking device 2.

[0088] In the version of the Figure 14A securing part in the form of a securing web 207 is provided on the closure assembly 2V as part of the securing mechanism S. This securing web 207 is formed on the second closure part 20 and, in the closed position of the closure assembly 2V, protrudes from the second closure part 20 in the direction of the first wall 100 and thus in the -y direction. The securing web 207 protrudes so far that one end of the securing web 207 engages below or behind the third closure part 22 - viewed in the z direction. In the -z direction, the securing web 207 and thus the closure assembly 2V in its closed position cannot be displaced past the third closure part 22. Adjustment of the closure assembly 2V in the -z direction is thus mechanically blocked by the interaction of the securing web 207 with the third closure part 22.This also prevents shear force-induced removal of the closure assembly 2V from the third closure part 22, for example due to increased internal pressure in the cavity 10. Thus, the securing bar 207 must first be adjusted by a targeted displacement of the closure assembly 2V in the y-direction away from the wall 10 and thus also from the third closure part 22, so that the securing bar 207 no longer blocks the folding of the closure assembly 2V.

[0089] The Fig. 15 shows a front view of a further embodiment of a proposed storage device in the form of a drinking bladder 1 with an outlet 10A for connecting a drinking tube to the hollow body 10. The Fig. 15A shows the drinking bladder 1 of the Fig. 15 in sectional view. The Fig. 16A-16C , 17A-17B and 18A-18B show further variants of the locking device 2 in an enlarged view according to section C of the Figure 15A .

[0090] In the variant of the Figures 16A-16C is analogous to the embodiment of the Figure 13 the closure assembly 2V is designed with an additional securing component in the form of a securing hook 206, which can engage in a securing recess 226 on the third closure part 22 in the closed position of the closure assembly 2V in order to additionally mechanically secure the closed position of the closure assembly 2V. In contrast to the embodiment of the Figure 13 The safety hook 206 is not formed on the first closure part 21, but on the second closure part 20, here, for example, on a handle body 2000 of the handle element 200. Thus, the safety hook 206 in the embodiment of the Fig. 16A to 16Cformed on that second closure part in the direction of the wall 100, which in the closed position of the closure assembly 2V along the direction -y (opposite to the opening direction y) lies in front of the first and third closure parts 21, 22.

[0091] On the wall 100, between the strip body 222 of the third closure part 22 and a positioning section 227 spaced apart therefrom in the vertical direction z, an engagement opening 2260 for the locking hook 206 on the closure assembly side is again defined. In order to facilitate the insertion of the locking hook 206 into the engagement opening 2260, the handle body 2000 is hinged to the strip body 202 of the second closure part 20. For this purpose, a wall thickness in a transition section A between the strip body 202 and the handle body 200 adjoining it in the vertical direction z is deliberately reduced and in the cross section of the Fig. 16A to 16Cvisible as an indentation. Thus, a targeted elasticity is introduced between the strip body 202 and the handle body 2000 at the transition section A, in order to enable the handle body 2000 to be displaced relative to the strip body 202 about a joint axis running parallel to the transverse direction x. The handle body 200 can thus be connected to the strip body 202, in particular, via a film hinge defined by the transition section A.

[0092] By transferring the locking assembly 2V into its locking position according to the Fig. 16A the safety hook 206 is inserted into the engagement opening 2260 and is initially in an intermediate position corresponding to the Fig. 16A The locking assembly 2V with the safety hook 206 is then moved along the vertical direction -z (in the Fig. 16A to 16Cupwards). This causes the securing hook 206 to be displaced from the intermediate position into an engaged position in which the securing hook 206 positively engages the securing recess 226 on the third closure part 22.

[0093] In order to specify the engagement position between the locking hook 206 on the closure assembly side and the third closure part 22 and, if necessary, to additionally secure it, a positive connection is provided between the handle body 2000 and the positioning section 27. Thus, a positive locking element in the form of a locking lug 200R is formed on the handle body 2000 at a distance from the locking hook 206. This locking lug 200R snaps into a locking opening 227R on the positioning section 227 when the closure assembly 2V with the locking hook 206 is moved from the intermediate position into the engagement position (see Fig. 16B ).

[0094] In order to release the securing mechanism S and thus disengage the securing hook 206 from the third closure part 22, it is sufficient for a user to grasp the handle element 200 and pivot the handle body 2000 outwards, i.e. away from the wall 100, about the joint axis defined by the transition section A. The position of the joint axis defined by the transition section A and the securing recess 226 as well as the securing hook 206 are coordinated with one another in such a way that the corresponding pivoting movement displaces the securing hook 206 out of the securing recess 226 and the engagement opening 2260.This allows a user to easily open the closure device 2, although the closure assembly 2V in the closed position is secured in several respects against unintentional opening and, in particular, counteracts shear forces acting in the xz plane and in the vertical direction -z, which result from an increased internal pressure in the hollow body 10.

[0095] The version of the Fig. 17A and 17B is basically the same as the version of the Fig. 16A to 16C In contrast to the version of the Fig. 16A to 16C is in the version of the Fig. 17A and 17BOnly the positive connection in the engagement position between the handle body 2000 and the positioning section 227 is designed differently. Thus, instead of a locking lug, a locking web 200R with a pin-shaped cross-section is provided on the handle body 2000, which can engage in a corresponding locking opening 227R, for example, designed in the form of a slot, on the positioning section 227R.

[0096] In the version of the Fig. 18A and 18B is analogous to the versions of the Fig. 16A-16C and 17A-17B a safety mechanism S is provided, in which the closure assembly 2V with a safety part in the form of a safety hook 216 is moved from an initially assumed intermediate position into an engaged position under magnetic force control, in which the safety hook 216 engages in a safety recess 226 on the third closure part 22. The safety hook 216 is in the embodiment of the Fig. 18A-18Bon the first strip body 212 of the first closure part 21. The strip body 212 then also interacts magnetically with the positioning section 227 in order to control the automatic displacement of the closure assembly 2V into the engagement position. An example of this is the embodiment of the Fig. 18A-18B At least one additional magnetic element 212M is provided in the strip body 212, spaced apart from the magnet arrangement 24 in the vertical direction -z. This at least one additional magnetic element 212M of the first closure part 21 interacts, for example, with at least one magnetic element 227M of the positioning section 27 to displace the closure assembly 2V, folded toward the wall 100, from the initially assumed intermediate position in the vertical direction -z (upward) into the engaged position.

[0097] In an alternative embodiment, it is of course also possible for the closure assembly 2V to be folded or rolled up several times around an axis parallel to the transverse direction x in order to assume the closed position on the wall 100. Furthermore, in order to secure the closed position using the securing mechanism S, it is not necessary for a third closure part 22 to interact with the closure assembly 2V in a magnetically attractive manner. In particular, in the embodiments of the Fig. 10A to 18B a magnet arrangement 25 in the strip body 222 of the third closure part 22 can be omitted without this impairing the functions of the safety mechanism S. List of reference symbols

[0098] 1Storage device / drinking bladder (liquid container) 10Hollow body 10AOutlet 100, 101Wall 102, 103Section 104, 105Closing section 106Inner layer 107Outer layer 2Closing device 2VClosing assembly 20, 21, 22Closing part 200, 210Handle element 200MMagnetic element 200RRease lug / locking web (positive locking element) 2000Handle body 201, 211, 221Receiving openings 202, 212, 222Strip body 204A, 204BSecuring pin (securing part) 205A, 205BMagnetic element 206Securing hook (securing part) 207Securing bar (securing part) 210MMagnetic element 212MMagnetic element 216Securing hook (securing part) 222A, 222BFilm hinge 223A, 223BSecuring tab (securing part) 224A, 224BReceptacle 225A, 225BMagnetic element 226Securing recess 2260Engagement opening 227Positioning section 227MMagnetic element 227RRetention opening 23, 24, 25Magnet arrangement 3Securing tab (securing element) 3.1, 3.2First securing part 30Outside 31Inside 4.1, 4.2Second securing part 41, 42Access opening 410, 420Insertion gap ATransition section FD Pressure / shear force component FL Release force SSecuring mechanism x, y, zDirection.

Claims

1. A closure device (2) for closing an opening that is formed between a first closing portion (104) and a second closing portion (105), and via which a hollow body (10) is accessible, which is bordered by at least one flexible wall (100, 101), wherein the closure device (2) includes a first closure part (21) for arrangement on the first closing portion (104) and a second closure part (20) for arrangement on the second closing portion (105), wherein - the first closure part (21) has a first strip body (212) longitudinally extended along a transverse direction (x), - the second closure part (20) has a second strip body (202) longitudinally extended along the transverse direction (x), - the first closure part (21) and the second closure part (20) cooperate in a magnetically attracting manner in such a way that in a closed position of the closure device (2) the first closing portion (104) and the second closing portion (105) rest against each other and form a closure compound (2V) with the first and second closure parts (21, 20), and - the closure compound (2V) can be adjusted from a release position, in which the first and second closing portions (104, 105) can be properly separated from each other against a magnetic force applied by the first and second closure parts (21, 20) to clear the opening, by folding or rolling the first and second closing portions (104, 105) at least once into a closing position, wherein the closure device (2) comprises a securing mechanism (S) via which the closure compound (2V) disposed in its closing position is secured against an inadvertent removal of the closure compound (2V) from the closing position due to an increased internal pressure in the hollow body (10), characterized in that the closure device (2) comprises at least one magnetic element (205A, 225A; 205B, 225B; 210M, 227M; 200M, 227M; 212M, 227M) by action of which at least one securing part (3.1, 3.2; 223A, 223B; 216, 207) of the securing mechanism (S) is positioned in a securing position in which the at least one securing part (3.1, 3.2; 223A, 223B; 216, 207) can block the closure compound (2V) via a form fit against an adjustment into the release position.

2. The closure device according to claim 1, characterized in that the closure device (2) is provided for a liquid reservoir (1) in which via the opening liquid can be filled into the hollow body (10) bordered by at least one flexible wall (100, 101).

3. The closure device according to claim 1 or 2, characterized in that the first and second strip bodies (212, 202) have two longitudinal ends and, in the closing position, the securing mechanism (S) is adapted to - counteract a lifting force acting on the first and second strip bodies (212, 202) at the longitudinal ends and resulting from the increased internal pressure, by action of which mutually opposite longitudinal ends of the first and second strip bodies (212, 202) strive to move away from each other, and / or - counteract a shear force resulting from the increased internal pressure, which acts in a middle area of the first or second strip bodies (212, 202) on the closure device (2) in a plane (xz-plane) extending parallel to the first and second closing portions (104, 105).

4. The closure device according to any of the preceding claims, characterized in that via the securing mechanism (S) there is provided a connection - between the closure compound (2V) and a wall (100) connected to the first closing portion (104) and / or - between the closure compound (2V), in particular the first or second closure part (21, 20), and a third closure part (22) of the closure device (2), in particular a third closure part (22), which in the closing position cooperates with the closure compound (2V) in a magnetically attracting manner, when the closure compound (2V) is disposed in the closing position.

5. The closure device according to any of the preceding claims, characterized in that the at least one securing part (3.1, 4.1; 3.2, 4.2; 223A, 204A; 223B, 204B; 216, 226; 207) secures the closure compound (2V) in the closing position via a form fit, in particular that the securing mechanism (S) includes at least two securing parts (3.1, 4.1; 3.2, 4.2; 223A, 204A; 223B, 204B; 216, 226) which in the closing position of the closure compound (2V) positively cooperate with each other in order to secure the closure compound (2V) in the closing position.

6. The closure device according to any of the preceding claims, characterized in that on transfer of the closure compound (2V) into its closing position the at least one securing part (3.1, 4.1; 3.2, 4.2; 216, 226; 207) is also adjusted into the securing position with the participation of the at least one magnetic element or the at least one securing part (223A, 223B) can be adjusted into the securing position only after transfer of the closure compound (2V) into its closing position.

7. The closure device according to any of the preceding claims, characterized in that an additional securing element (3) is provided at the closure compound (2V), to which at least one securing part (3.1, 3.2) of the securing mechanism (S) is fixed at a distance to the first and second closure parts (21, 20).

8. The closure device according to claims 4 and 7, characterized in that the securing part (3.1, 3.2) provided on the securing element (3) forms a first securing part, which in the closing position of the closure compound (2V) is positively connected to a second securing part (4.1, 4.2) that is provided on the wall (100).

9. The closure device according to any of the preceding claims, characterized in that after transfer of the closure compound (2V) into its closing position at least one securing part (223A, 223B) of the securing mechanism (S) can be adjusted into a securing position by pivoting about at least one joint axis, in which securing position the at least one securing part (223A, 223B) secures the closure compound (2V) disposed in its closing position, in particular wherein the joint axis extends transversely to a direction of longitudinal extension of the first and / or second strip body (212, 202).

10. The closure device according to claim 9, characterized in that on the at least one securing part (223A, 223B) at least one receptacle (224A, 224B) is provided, into which a further securing part (204A, 204B) of the securing mechanism (S) positively engages in the securing position, and / or on the at least one securing part (223A, 223B) at least one form-fit element is provided, which in the securing position positively engages into a receptacle of a further securing part of the securing mechanism (S).

11. The closure device according to any of the preceding claims, characterized in that - the closure compound (2V) can be transferred from the release position into the closing position by folding or rolling the closure compound (2V) at least once about a pivot axis parallel to a first spatial direction (x), - a magnetic force for holding the closure compound (2V) in its closing position with respect to the third closure part (22) acts along a spatial axis that is parallel to a second spatial direction (y) extending perpendicularly to the first spatial direction (x), and - via the securing mechanism (S) the closure compound (2V) is secured against removal from the third closure part (22) by action of a shear force which points in a third spatial direction (-z) that is both perpendicular to the first spatial direction (x) and perpendicular to the second spatial direction (y).

12. The closure device according to claim 10 and 11, characterized in that the securing mechanism (S) includes at least one securing part (216) which is disposed in an intermediate position when the closure compound (2V) reaches the closing position, and the securing part (216) can be displaced from the intermediate position into an engagement position in which the securing part (216) blocks the closure compound (2V) against an adjustment along the third spatial direction (-z), wherein optionally in the engagement position the at least one securing part (216) blocks the closure compound (2V) against an adjustment along the third spatial direction (-z) and against an adjustment along the second spatial direction (y).

13. The closure device according to claim 12, characterized in that the closure device (2) comprises at least one magnetic element with the participation of which the at least one securing part (216) is adjusted from the intermediate position into the engagement position.

14. A liquid reservoir, in particular a drinking bladder, comprising a hollow body (10) for receiving a liquid, wherein the liquid can be filled into the hollow body (10) via an opening that can be closed by a closure device according to any of claims 1 to 13.