Filter insert, jug insert and table water jug

Abstract

The invention relates to a filter insert for a table water jug, wherein the filter insert is designed for insertion into a jug container of the table water jug, wherein the filter insert comprises a housing with a housing opening and a housing cover for closing the housing opening in a filtering position and wherein the housing forms a housing receptacle for receiving a filter element, wherein the filter insert comprises a housing cover guide device for guiding a movement of the housing cover relative to the housing when transferring the filter insert from an insertion position, in which the housing cover is completely separated from the housing, into the filtering position. Furthermore, an improved jug insert and a table water jug are proposed.

Description

The present invention relates to a filter insert for a table water can, wherein the filter insert is designed for insertion into a can container of the table water can, wherein the filter insert comprises a housing with a housing opening and a housing cover for closing the housing opening in a filter position, and wherein the housing forms a housing receptacle for receiving a filter element.The present invention further relates to a can insert for insertion into a can container of a table water can in a defined manner, wherein the can insert is designed to receive a filter insert in an inserted position in a defined manner.The present invention also relates to a table water pot comprising a pot container having a pot container opening for filling water and a spout for pouring water, wherein the pot container is designed to receive a filter insert for filtering water received in the pot container.Filter inserts, can inserts and table water cans of the type described at the beginning are known in various embodiments. Table water pots of this type are used in particular to treat tap water, for example to filter and / or demineralize tap water.In order to replace a used filter element, the filter insert must be opened. For this purpose, the housing cover is usually moved relative to the housing in order to release the housing receptacle, so that access to the filter element contained therein is made possible.The handling of known filter inserts is often complicated. Therefore, an intuitive operation for a user is particularly desired.It is thus an object of the present invention to improve a filter insert, a can insert and a table water can of the type described at the beginning in such a way that they can be handled more easily.This object is achieved according to the invention in a filter insert of the type described at the beginning in that the filter insert comprises a housing cover guiding device for guiding a movement of the housing cover relative to the housing when the filter insert is transferred from an introduction position, in which the housing cover is completely separated from the housing, into the filter position.Such a housing cover guiding device makes it possible in particular to place the housing cover on the housing in a defined manner and then to transfer it into the filter position. With a corresponding configuration of the housing cover guiding device, it is then possible in particular for a user to handle the filter insert by merely gripping the housing cover. In other words, the filter insert can be gripped by a user exclusively on the housing cover when it is inserted, for example, into the table water can, in particular a can insert of the same. In this way, it is possible in particular to prevent the housing from becoming detached from the housing cover if a user grasps the filter insert exclusively on the housing cover and handles it with the latter.It is advantageous if the housing cover guide device comprises a slotted guide for guiding a movement of the housing cover relative to the housing along a guide track. Such a configuration makes it possible in particular to separate movement directions from one another, for example for a movement of the housing cover toward the housing for the first bringing them into engagement with one another and then for moving the housing cover relative to the housing for transfer into the filter position, in which the housing cover can optionally be locked or is locked on the housing. Thus, in particular, unintentional detachment of the housing cover from the housing can be prevented if the filter insert is handled exclusively on the housing cover by a user.It is advantageous if the guide track is formed to be straight or curved. In particular, it can be L-shaped or U-shaped. L-shaped or U-shaped guideways permit separation of movement in different directions as described. Thus, as explained, reliable handling of the filter insert on the housing cover can be made possible.For reliable guidance of the housing cover on the housing, it is favorable if the slotted guide comprises at least two, in particular four, guide grooves, and if the guide grooves define the guide track.The slotted guide preferably comprises at least two, in particular four, guide members interacting with the guide grooves and engaging in the latter. Thus, the slotted guide can serve both for guiding a relative movement of housing cover and housing and for defined connection or coupling of the same to one another.In order to prevent unintentional detachment of the housing cover from the housing, it is advantageous if each guide member locks with the associated guide track in the filter position.Locking or latching of the housing cover on the housing in the filter position can be realized in a simple manner in particular if a latching depression is formed on each guide track, into which the associated guide member latches or snaps when the filter position is reached. Such a latching or snapping-in gives a user haptic feedback that the housing cover has reached the desired filter position.It is advantageous if each guide member is arranged on a spring element which, when inserted into the guide track, deforms from a basic position in the direction of the housing receptacle and, when engaging with the latching depression, springs back in the direction away from the housing receptacle into the basic position. Such a design of the filter insert enables, in particular, a latching of the housing cover to the housing in the filter position in a simple manner.In order that no undesired projections need to be formed on the housing, which could damage a filter insert in particular when it is introduced into the housing receptacle, it is advantageous if the at least two guide members are arranged or formed on the housing cover.The filter insert advantageously comprises a housing cover locking device for locking the housing cover on the housing in the filter position. In this way, it can be ensured in particular that the housing cover cannot be detached from the housing without overcoming the housing cover locking device.The filter insert can be made particularly simple and compact if the housing cover locking device comprises the at least two guide members and the latching recesses on the at least two guide notes. In other words, the at least two guide members and the latching recesses assigned to them form housing cover locking device elements which interact in particular in the filter position, namely are engaged in this in a force-fit and / or form-fit manner.It is advantageous if at least one water inlet is formed on the housing cover, and if at least one water outlet is formed on the housing. This makes it possible in particular to allow water to flow or flow through the housing cover into the housing receptacle and out of the housing through the at least one water outlet. Thus, water can be filtered and / or demineralized by means of a filter element accommodated in the housing receptacle when flowing through the filter insert.In order in particular to prevent the filter element or parts thereof from being able to emerge from the housing, it is advantageous if the at least one water outlet is closed by a mesh filter. If the filter element comprises filter particles, for example beads, for example, which are accommodated in a bag-like container, it can be prevented in the event of damage to the container that such beads can emerge from the housing through the water outlet.The housing can be formed in a simple manner if the at least one water outlet is formed in a circular manner.It is furthermore advantageous if the housing tapers from a housing top side which comprises the housing opening to a housing bottom side which comprises the at least one water outlet. Such a configuration makes it possible in particular to insert the filter insert into a correspondingly tapering can insert of a table water can. In particular, a form-fitting reception of the filter insert in the can container or in the can insert of the table water can thus be made possible in a simple manner.In order to simplify the introduction of a filter element into the housing receptacle, it is advantageous if the housing cover is designed to be completely separable from the housing. It can then be completely removed for loading the housing with the filter element.According to a further preferred embodiment, it can be provided that the housing opening is bounded by a housing opening edge and that a circumferential edge flange extends away from the housing opening from the housing opening edge. Such a configuration can be used in particular to place the housing cover in a defined manner on the housing for closing the same. The encircling edge flange can therefore in particular limit a movement of the housing cover towards the housing.Moreover, it can be favorable if the housing opening edge comprises two housing opening edge sections running straight and parallel to one another and if the housing opening edge sections running straight run parallel to a housing preferred axis. The straight-line housing opening edge sections can in particular guide a movement of the housing cover relative to the housing to guide the slotted link. They can in particular form part of the housing cover guide device in order to guide the housing cover into the filter position for a final movement relative to the housing.It can furthermore be advantageous if the housing opening edge comprises two convexly curved housing opening edge sections pointing away from the housing opening, and if the curved housing opening edge sections connect the two housing opening edge sections running in a straight line to one another. Thus, an elongate oval housing opening edge can be formed overall. In particular, a shape of the curved housing opening edge sections can be adapted to an inner contour of a can insert in order to achieve a sealing of the filter insert relative to the can insert. It can thus be ensured, for example, that unfiltered water which is filled into the can insert must flow through the filter insert in order to extend out of the can insert.It is advantageous if the slotted guide is designed in such a way that the housing cover touches the housing in the region of one of the two curved housing opening edge sections when the at least two guide members and the at least two guide grooves come into contact and touches the other of the two curved housing opening edge sections in the filter pitch. Such a configuration enables a user in particular to immediately recognize whether or not the housing cover on the housing already assumes the filter position. This can be indicated to him in particular by a marking being provided in the region of one of the housing opening edge sections, which marking is only visible when the housing cover and the housing assume the filter position, in particular when they are locked therein.It is advantageous if, in the filter position, an edge bearing surface of the housing opening edge is at least partially visible in the region of one of the two curved edge housing opening edge sections, which contact the housing cover when the at least two guide members and the at least two guide grooves come into contact. As already explained, it can be directly indicated to a user that the filter insert is in the filter position, thus the housing cover is positioned relative to the housing in such a way that it is secured to the housing in a defined manner.It is advantageous if a directional arrow is arranged on the visible region of the edge bearing surface in the filter position, which directional arrow indicates a displacement direction of the housing cover relative to the housing for transferring the filter insert from the filter position into the introduction position. Thus, a user can in particular immediately recognize in which direction he must move the housing cover in order to be able to remove it from the housing.According to a further preferred embodiment, it can be provided that the housing opening edge comprises a can insert contact edge which extends away from the housing receptacle and transversely to the edge bearing surface and, in an inserted position in which the filter insert is inserted in a planar manner into the can insert, bears in a planar manner against a circumferential can insert wall which tapers from a can container opening in the direction of a container base of the can container. This embodiment makes it possible, in particular, to realize a sealing of the filter insert relative to the can insert with the filter insert, in particular the can insert contact edge. In this way, it is possible in particular to prevent water filled into the can insert from being able to flow past the filter insert. Rather, it can be achieved in this way that water filled into the can insert must necessarily flow through the filter insert in order to pass out of the can insert.Preferably, the can insert contact edge is inclined by an angle of inclination with respect to a can insert longitudinal axis. This embodiment can in particular realize a type of conical sealing surface, namely both on the filter insert and on the can insert. Thus, a reliable sealing of the filter insert relative to the can insert in the inserted position can be achieved.Advantageously, the angle of inclination is in a range from about 3° to about 12°. Thus, in particular, a self-locking can be prevented with a corresponding choice of materials for forming the filter insert and the can insert when they are in engagement.Advantageously, the housing opening edge has an edge bearing surface pointing away from a housing underside of the housing. This makes it possible in particular to bring the housing cover into contact with the housing in a defined manner.In order to be able to preset a defined positioning of the housing cover on the housing, it is advantageous if the housing cover rests on the edge bearing surface in the filter position.It is advantageous if the housing cover comprises an outer circumferential cover edge and if the cover edge comprises a cover edge surface resting on the edge bearing surface in the filter position. This embodiment makes it possible in particular to seal the housing cover against the housing in the region of the circumferential cover edge, namely by means of the edge bearing and cover edge surfaces abutting one another.The slotted guide is preferably designed in such a way that, when the housing cover is moved relative to the housing, the edge bearing surface and the cover edge surface remain aligned parallel to one another. In particular, tilting of the housing cover relative to the housing can thus be prevented in a simple manner.It is advantageous if the housing opening defines a housing preferred axis and if the housing cover resting on the edge bearing surface is displaceable parallel or substantially parallel to the housing preferred axis. In this way, in particular a simple displacement movement that is also recognizable to a user can be specified in order to move the housing cover relative to the housing into the filter position.A parallel movement of the housing cover and of the housing to the edge bearing surface can be achieved in a simple manner in that the guide track comprises a guide track section which runs parallel to the edge bearing surface.It is advantageous if the at least two guide grooves are formed in a wall surface of the housing facing the housing receptacle, starting from the edge bearing surface. In particular, the at least two guide grooves can form recesses in the edge bearing surface. Such a configuration makes it possible in particular in a simple manner to bring the housing cover and the housing into engagement. For example, the guide members can be placed on the edge bearing surface and the housing cover can be displaced relative to the housing until the guide members engage in the guide grooves. Then, a guidance of a movement of the housing cover relative to the housing is possible by means of the guide grooves of the slotted guide.According to a further preferred embodiment, it can be provided that at least one support web for the filter element protruding in the direction of the housing receptacle is formed on a housing bottom side of the housing. Such a configuration makes it possible in particular to arrange the filter element somewhat spaced apart from the water outlet. Thus, the flow through the filter insert can be simplified and improved.The at least one support web advantageously extends transversely, in particular perpendicularly, to the housing preferred axis. In this way, the bearing webs can be kept as short as possible. In addition, they can thus support a filter element in a particularly reliable and stable manner.For handling the filter insert, it is favorable for an operator if at least one recessed grip is formed on the housing cover, said recessed grip opening pointing away from the housing receptacle. With this, for example, the housing cover can be gripped or also handled, for example displaced relative to the housing.The at least one water outlet is advantageously formed in the region of the at least one grip recess. In this way, it can be ensured in particular that water can reliably flow through the filter insert and that undesired standing regions for water do not occur in which a movement through the filter insert is no longer possible.Preferably, the housing has a housing underside and a housing base projecting therefrom. Such a housing base can serve in particular for the purpose of depositing the filter insert in the desired manner. It can also be assigned a centering function, however, in order to center the filter insert in a can insert, for example. For this purpose, a corresponding recess or aperture can be provided, for example, on the can insert, into which the housing base can engage when the filter insert is inserted into the can insert as intended.It is advantageous if the at least one water outlet is formed on the housing base. If the housing base forms the deepest point of the filter insert, water can thus also reliably escape from the filter insert again.In order to keep a filter element spaced apart from the housing base, it is advantageous if the at least one support web is formed on the housing base.According to a further preferred embodiment, it can be provided that the filter insert comprises a filter element with a flexible, fluid-permeable filter bag and that a filter material is accommodated in the filter bag. The filter material can be designed in particular in the form of a basket or ball, so that it is held securely in the filter bag and cannot emerge from it in an undesired manner. The filter material can be designed in particular for filtering out suspended materials and / or for demineralized water, for example for decalcifying.For simple production and also handling, it is favorable if the housing cover defines a housing preferred axis and is formed symmetrically with respect to two mirror planes running perpendicular to one another, and if one of the two mirror planes contains the housing preferred axis.Furthermore, it is advantageous for the production and handling of the filter insert if the housing is designed mirror-symmetrically with respect to a mirror plane containing the housing preferred axis. In particular, it can be configured mirror-symmetrically only with respect to this one mirror plane. In this way, it can be ensured in particular that there is only a single possibility of coupling the housing cover to the housing.The object set at the beginning is furthermore achieved according to the invention in a can insert of the type described at the beginning in that the filter insert is designed in the form of one of the advantageous embodiments of filter inserts described above.To further develop a can insert of the type described at the beginning in this way then has in particular the advantages described above in connection with preferred embodiments of filter inserts. Such a can insert can in particular subdivide a can container into two regions, namely a region surrounded by the can insert and a region between the can insert and the can container. Thus, in particular unfiltered or untreated water can be filled into the can insert and filtered or treated by the filter insert inserted into the can insert and then pass from the can insert through the filter insert into the region of the can container, which is bounded on the one hand by the can container and on the other hand by the can insert. In this region, filtered or treated, for example demineralized, water is then absorbed.The can insert advantageously has a can insert bottom with a can insert bottom opening. This makes it possible in particular to arrange the filter insert such that water can only escape through the can insert bottom opening if it has previously flowed through the filter insert. Thus, untreated water can be absorbed in the can insert and then, after filtering or demineralized water, pass through the can insert bottom opening into that region of the can container in which treated water is collected.In order to form a can container which is as slender as possible, it is advantageous if the can insert bottom opening is of elongate oval configuration. It is thus possible in particular to open almost the entire can insert base in order to achieve a high filter rate.It is advantageous if at least one guide rib is formed on an inner wall surface of the can insert, starting from the can insert base, for centering guidance of the filter insert during insertion into the can insert. In this way, it can be prevented in particular that the filter insert can jam in the can insert or assume an undefined other position. In particular, it can thus be ensured that the water outlet provided on the filter insert is positioned in a defined manner in the region of the can insert bottom opening. In particular, a reliable function of the table water can can thus be ensured.Advantageously, a plurality of guide ribs are provided which, when the filter insert is received in the can insert, bear flat on the outside of the housing. In other words, the filter insert can be supported on the guide ribs. At the same time, the guide ribs position them in the can insert in the desired manner.Preferably, the at least one guide rib has a sliding surface interacting with the housing. Such a sliding surface facilitates in particular the insertion of the filter insert into the can insert. The sliding surface can be correspondingly shaped in such a way that it can guide a movement of the filter insert along a desired movement path when it is introduced into the can insert.For this purpose, it is particularly advantageous if the sliding surface is curved in a rectilinear manner in sections and convexly in sections pointing in the direction of the housing receptacle. This embodiment makes it possible, in particular when a plurality of guide ribs are provided, to center the filter insert initially introduced into the can insert in an unguided manner by curved sections of the sliding surface and then to bring it into its final insert position.It is furthermore favorable if the housing base of the filter insert dips into the can insert base opening when the filter insert is accommodated in the can insert. In particular when the at least one water outlet encompassed by the filter insert is arranged or formed on the housing base, a virtually unhindered flow of the water to be treated through the filter insert from the can insert through the can insert bottom opening into the can container can thus be achieved.The object set at the beginning is furthermore achieved according to the invention in a table water pot of the type described at the beginning in that it comprises a filter insert which is designed in the form of one of the advantageous embodiments of filter inserts described above.A table water can of such a design has in particular the advantages already described above in connection with preferred embodiments of filter inserts.It is furthermore advantageous if the can container comprises a can insert for receiving unfiltered water and if the can insert is received in the can container in a can insert position for separating container regions for untreated and treated water. As already explained, the can insert can be charged with untreated water. If the filter insert is accommodated in the can insert and positioned such that water can flow out of the can insert only after flowing through the filter insert through the can insert bottom opening, untreated and treated water can thus be separated from one another in a defined and hygienic manner.The can insert is preferably designed in the form of one of the above-described preferred embodiments of can inserts. The table water can then also has the advantages described above in connection with preferred embodiments of can inserts overall.Moreover, it is advantageous if the table water can comprises a container cover for closing the can container opening in a closed position. This can prevent dirt from entering the table water can.It is advantageous if the container lid is designed in the form of a lid device if the lid device comprises a lid with a filling opening, in particular for filling the can container when the lid device is placed on, and a filling opening lid for closing the filling opening in a closed position, and if the filling opening lid is displaceable from the closed position into a filling position in which it at least partially releases the filling opening, and vice versa. Such a configuration makes it possible in particular to fill the table water can with untreated water without having to remove the container cover. For this purpose, only the filling opening cover has to be moved from the closed position to open the filling opening into the filling position.For a simple connection of the lid device to the can container or the can insert, it is favorable if the table water can comprises a lid coupling device for force- and / or form-locking coupling of the lid device to the can container or the can insert in the closed position. It is in particular conceivable to couple the lid device to the can container on the one hand or to the can insert on the other hand in the closed position.The table water can be handled in a simple manner if the cover coupling device is designed in the form of a first latching or snap-in connection device. The container cover can thus be snapped or latched by a user in particular in a simple manner onto the can container or the can insert.The cover device preferably comprises an undercut-free cover holding device for holding the filling opening cover on the cover in a holding position in a purely force-locking manner. A cover device configured in this way makes it possible in particular to simply lift the filling opening cover off the cover. Undercuts do not have to be disengaged in this embodiment.It is furthermore advantageous if the filling opening cover is configured such that it can be brought from the holding position into a separating position, in which the filling opening cover is removed from the cover and separated. In this way, the cover and the filling opening cover can be separated from one another in a simple manner, for example for cleaning.For the handling of the table water can, it is advantageous if the filling opening cover is designed to slide on the cover when moving from the closed position into the filling position and vice versa. A user then merely has to apply a low actuating force to the filling opening cover in order to move the latter from the closed position into the filling position and vice versa.Moreover, it can be favorable if the cover device comprises a locking device for locking the filling opening cover in at least one locking position. Such a configuration has the particular advantage that the filling opening cover can then be locked in a defined position on the cover. For example, these can be the closed position or the filling position or any other position. It can thus be ensured, for example, that the filling opening cannot be closed off by the filling opening cover when filling the table water pot with water.Preferably, the at least one locking position defines the closed position and / or the filling position. In this way, the filling opening cover can be fixed to the cover, in particular in the closed position and / or the filling position. In order to move it out of the locking position, an additional exertion of force is then required in particular.The cover device can be formed in a simple manner if the locking device comprises interacting first and second locking elements which are arranged or formed on the one hand on the cover and on the other hand on the filling opening cover, and if the interacting first and second locking elements are in engagement in a force-fit and / or form-fit manner in the at least one locking position.A locking which is essentially contact-free can be realized in particular in that the first and second locking elements which interact in the at least one locking position are in engagement by magnetic interaction. The locking elements are thus held in the locking position by a magnetic force. For example, the locking elements can comprise or be formed by two magnets which, in the locking position, are oriented such that the south pole of one magnet and the north pole of the other magnet directly lie opposite one another and thereby attract one another.It can furthermore be advantageous if the cover holding device comprises a magnetic holding device for magnetically holding the filling opening cover on the cover in the holding position by magnetic force action. In particular, this can take place exclusively by magnetic force action. Such a configuration makes it possible in particular to completely dispense with undercuts for coupling the filling opening cover to the cover. The filling opening cover can then be removed from the cover, for example, simply by overcoming the magnetic attractive force by a user and lifting the filling opening cover from the cover.The magnetic holding device preferably comprises at least two interacting holding elements which are arranged or formed on the one hand on the filling opening cover and on the other hand on the cover. They can attract one another in particular by acting magnetic forces and thus hold the filling opening cover on the cover.Advantageously, at least one of the at least two cooperating retaining elements is magnetic. For example, it can be designed in the form of a magnet. Such a holding element can cooperate in particular with a further magnet or also with a magnetizable holding element in order to hold the filling opening cover on the cover in the holding position.The table water can be formed in a simple and compact manner if the at least one magnetic retaining element is arranged or formed on the filling opening cover.According to a further preferred embodiment, it can be provided that the container lid closes the can insert in the closed position. Such a configuration enables in particular the option that the can container partially remains open. In particular, the spout can remain free.Preferably, the container cover releases the spout in the closed position. Thus, treated water can be removed from the table water can by pouring it out of the table can through the spout, even when the container cover closes the can insert.The table water can is advantageously designed as a table water filter can for filtering water. As already described, untreated water can be introduced into the can insert. With a corresponding arrangement, it can then flow through the filter insert in order to thus reach a collecting region in the can container, from which it can then be removed or poured again through the spout.Preferably, the can insert adjoins the spout in the can insert position and releases the spout. This enables easy handling of the table water can, in particular the removal of treated water from the same, namely by simple pouring out of the spout.According to a further preferred embodiment, it can be provided that the can container comprises an insert coupling device for the frictional and / or positive coupling of the can container and the can insert in the can insert position. This embodiment makes it possible in particular to position the can insert in a defined manner in the can container. In addition, it can be prevented in particular that the can insert can move in an undesired manner in the can container, for example during filling with water or during pouring out of water from the table water can.The table water can can be formed in a simple manner in particular if the insert coupling device is formed in the form of a second latching or snap-in connection device.It is furthermore advantageous if the insert coupling device comprises interacting first and second insert coupling elements which are arranged or formed on the one hand on the can container and on the other hand on the can insert, and if the first and second insert coupling elements are in engagement in a force-fit and / or form-fit manner in the can insert position. Such an insert coupling device enables in particular simple handling by a user. In addition, the table water can can be easily produced in this way.Preferably, the first and second insert coupling elements are designed in the form of second snap-in or snap-in connection elements. These can be in engagement in a force-fit and / or form-fit manner, in particular in the can insert position.Moreover, it can be advantageous if the can insert can be removed from the can container in the closed position. This makes it possible in particular to leave the container cover on the can insert, but nevertheless to remove the can insert from the can container. In other words, for removing the can insert, the container lid does not have to be removed from the table water can.The above description thus comprises in particular the embodiments of filter inserts, can inserts and table water cans defined below in the form of numbered sets: 1. filter insert (20) for a table water can (10), wherein the filter insert (20) is configured for insertion into a can container (14) of the table water can (10), wherein the filter insert (20) comprises a housing (218) with a housing opening (220) and a housing cover (222) for closing the housing opening (220) in a filter position and wherein the housing (218) forms a housing receptacle (224) for receiving a filter element (226), characterized in that, the filter insert (20) comprises a housing cover guiding device (250) for guiding a movement of the housing cover (222) relative to the housing (218) when the filter insert (20) is transferred from an introduction position, in which the housing cover (222) is completely separated from the housing (218), into the filter position. 2. filter insert according to Set 1, characterized in that the housing cover guide device (250) comprises a slotted guide (252) for guiding a movement of the housing cover (222) relative to the housing (218) along a guide track (254). 3. filter insert according to Set 2, characterized in that the guide track (254) is formed in a straight or curved manner, in particular in an L-shaped or U-shaped manner. 4. filter insert according to claim 2 or 3, characterised in that the slotted guide (252) comprises at least two, in particular four, guide grooves (256) and that the guide grooves (256) define the guide track (254). 5. filter insert according to Set 4, characterized in that the slotted guide (252) comprises at least two, in particular four, guide members (288) which interact with the guide grooves (256) and engage therein. 6.Filter insert according to Claim 5, characterized in that each guide member (288) locks with the associated guide track (254) in the filter position. 7. filter insert according to claim 5 or 6, characterised in that a latching recess (292) is formed on each guide track (254), into which recess the associated guide member (288) latches or snaps when the filter position is reached. 8th filter insert according to one of the sets 5 to 7, characterized in that each guide member (288) is arranged on a spring element (290), which, when inserted into the guide track (254), deforms from a basic position in the direction of the housing receptacle (224) and, when latched with the latching depression (292), springs back in the direction away from the housing receptacle (224) into the basic position. 9. filter insert according to one of the sets 5 to 8, characterized in that the at least two guide members (288) are arranged or formed on the housing cover (222). 10. filter insert according to one of the preceding sets, characterized in that the filter insert (20) comprises a housing cover locking device (296) for locking the housing cover (222) on the housing (218) in the filter position. 11 Filter insert according to Claim 10, characterized in that the housing cover locking device (296) comprises the at least two guide members (288) and the latching recesses (292) on the at least two guide grooves (256). 12th filter insert according to one of the preceding sets, characterized in that at least one water inlet (298) is formed on the housing cover (222), and in that at least one water outlet (236) is formed on the housing (218). 13.Filter insert according to Set 12, characterized in that the at least one water outlet (236) is closed by a net filter (238). 14. filter insert according to Set 12 or 13, characterized in that the at least one water outlet (236) is of circular design. 15. filter insert according to one of the sets 12 to 14, characterized in that the housing (218) tapers from a housing top side (232), which comprises the housing opening (220), towards a housing bottom side (234), which comprises the at least one water outlet (236). 16. filter insert according to one of the preceding sets, characterized in that the housing cover (222) is formed so as to be completely separable from the housing (218). 17. filter insert according to one of the preceding sets, characterized in that the housing opening (220) is delimited by a housing opening edge (248), and in that a circumferential edge flange (262) extends away from the housing opening (220) from the housing opening edge (248). 18. filter insert according to Claim 17, characterized in that the housing opening edge (248) comprises two housing opening edge sections (246) which run in a straight line and parallel to one another, and in that the housing opening edge sections (246) which run in a straight line run parallel to a housing advancing axis (244). 19.Filter insert according to Set 18, characterized in that the housing opening edge (248) comprises two convexly curved housing opening edge sections (276, 278) pointing away from the housing opening (220), and in that the curved housing opening edge sections (276, 278) connect the two housing opening edge sections (246) running in a straight line to one another. 20.Filter insert according to Set 19, characterized in that the slotted guide (252) is designed in such a way that the housing cover (222) touches the housing (218) in the region of one of the two curved housing opening edge sections (276) when the at least two guide members (288) and the at least two guide grooves (256) come into contact and, in the filter position, touches the other of the two curved housing opening edge sections (278). 21st filter insert according to Claim 19 or 20, characterized in that, in the filter position, an edge bearing surface (264) of the housing opening edge (248) is at least partially visible in the region of the one of the two curved housing opening edge sections (276), which, when the at least two guide members (288) and the at least two guide grooves (256) come into contact with the housing cover (222). 22.Filter insert according to Set 21, characterized in that a directional arrow (314) is arranged on the visible region of the edge bearing surface (264) in the filter position, said directional arrow indicating a displacement direction of the housing cover (222) relative to the housing (218) for transferring the filter insert (20) from the filter position into the introduction position. 23.Filter insert according to one of the sets 17 to 22, characterized in that the housing opening edge (248) comprises a can insert contact edge (266), which points away from the housing receptacle (224) and extends transversely to the edge bearing surface (264), and, in an insert position in which the filter insert (20) is inserted into the can insert (16), bears flat against a circumferential can insert wall (270), which tapers from a can container opening (50) in the direction of a container base (268) of the can container (14). 24th filter insert according to Claim 23, characterized in that the can insert contact edge (266) is inclined by an angle of inclination (274) with respect to a can insert longitudinal axis (272). 25.The filter cartridge of claim 24, characterized in that the angle of inclination (274) is in a range from about 3° to about 12°. 26. filter insert according to one of the sets 17 to 25, characterized in that the housing opening edge (264) has an edge support surface (264) pointing away from a housing underside (234) of the housing (218). 27. filter insert according to Set 26, characterized in that the housing cover (222), in the filter position, rests on the edge bearing surface (264). 28. filter insert according to Set 26 or 27, characterized in that the housing cover (222) comprises an outer circumferential cover edge (308), and in that the cover edge (308) comprises a cover edge surface (310) resting on the edge bearing surface (264) in the filter position. 29. filter insert according to Set 28, characterized in that the slotted guide (252) is designed in such a way that, when the housing cover (222) is moved relative to the housing (218), the edge bearing surface (264) and the cover edge surface (310) remain aligned parallel to one another. 30. filter insert according to one of the sets 26 to 29, characterized in that the housing opening (220) defines a housing advancing axis (244), and in that the housing cover (222) resting on the edge bearing surface (264) is displaceable parallel or substantially parallel to the housing advancing axis (244). 31 Filter insert according to one of the sets 26 to 30, characterised in that the guide track (254) has a guide track section (282) which runs parallel to the edge bearing surface (264). 32. filter insert according to one of the sets 26 to 31, characterized in that the at least two guide grooves (256), starting from the edge bearing surface (264), are formed in a wall surface (294) of the housing (218) facing the housing receptacle (224). 33. filter insert according to one of the preceding sets, characterized in that at least one support web (242) for the filter element (226) protruding in the direction of the housing receptacle (224) is formed on a housing underside (234) of the housing (218). 34. filter insert according to Set 33, characterized in that the at least one bearing web (242) extends transversely, in particular perpendicularly, to the housing preferred axis (244). 35. filter insert according to one of the preceding sets, characterized in that at least one recessed grip (306), which is open in the direction away from the housing receptacle (224), is formed on the housing cover (222). 36. filter insert according to Set 35, characterized in that the at least one water inlet (298) is formed in the region of the at least one recessed grip (306). 37th filter insert according to one of the preceding sets, characterized in that the housing (218) has a housing bottom side (234) and a housing base (240) projecting therefrom. 38th filter insert according to Set 37, characterized in that the at least one water outlet (236) is formed on the housing base (240). 39. filter insert according to claim 37 or 38, characterised in that the at least one support web (242) is formed on the housing base (240). 40th filter insert according to one of the preceding sets, characterized in that it comprises a filter element (226) with a flexible, fluid-permeable filter bag (228) and in that a filter material (230) is accommodated in the filter bag (228). 41. filter insert according to one of the preceding sets, characterized in that the housing cover (222) defines a housing preferred axis (244) and is formed symmetrically with respect to two mirror planes (284, 286) running perpendicular to one another, and in that one of the two mirror planes (284, 286) contains the housing preferred axis (244). 42. filter insert according to Set 41, characterized in that the housing (222) is formed mirror-symmetrically with respect to a mirror plane (284) containing the housing preferred axis (244). 43. can insert (16) for insertion into a can container (14) of a table water can (10) in a defined manner, wherein the can insert (16) is designed to receive a filter insert (20) in an inserted position in a defined manner, characterized in that the filter insert (20) is designed in the form of a filter insert (20) according to one of the preceding sets. 44. can insert according to Set 43, characterized in that the can insert (16) has a can insert base (200) with a can insert base opening (204). 45. can insert according to Set 44, characterized in that the can insert bottom opening (204) is of elongate oval configuration. 46. can insert according to Claim 44 or 45, characterized in that at least one guide rib (208) is formed on an inner wall surface (206) of the can insert (16) starting from the can insert base (200) for centring guidance of the filter insert (20) during insertion into the can insert (16). 47. can insert according to Set 46, characterized in that a plurality of guide ribs (208) are provided which, when the filter insert (20) is accommodated in the can insert (16), bear flat against the outside of the housing (218). 48th Can insert according to Set 46 or 47, characterized in that the at least one guide rib (208) has a sliding-on surface (212) which interacts with the housing (218). 49. can insert according to set 48, characterized in that the sliding surface (212) is curved in a rectilinear manner in sections and convexly in sections pointing towards the housing receptacle (224). 50.A can insert according to one of the sets 44 to 49, characterized in that the housing base (240) of the filter insert (20) dips into the can insert base opening (204) when the filter insert (20) is accommodated in the can insert (16). 51: Table water can (10) comprising a can container (14) with a can container opening (50) for filling water and a spout (32) for pouring water, wherein the can container (14) is configured to receive a filter insert (20) for filtering water received in the can container (14), characterized by a filter insert (20) according to one of the sets 1 to 42 52: Table water can according to set 51, characterized in that the can container (14) comprises a can insert (16) for receiving unfiltered water and that the can insert (16) is received in a can insert position in the can container (14) for separating container regions for untreated and treated water. 53. table water can according to set 52, characterised in that the can insert (16) is designed in the form of a can insert (16) according to one of the sets 42 to 49. 54. table water can according to one of the sets 51 to 53, characterized in that the table water can (10) comprises a container cover (52) for closing the can container opening (50) in a closed position. 55th table water can according to Set 54, characterized in that the container lid (52) is designed in the form of a lid device (18), in that the lid device (18) comprises a lid (88) with a filling opening (90), in particular for filling the can container (14) when the lid device (18) is placed on, and a filling opening lid (92) for closing the filling opening (90) in a closed position, and in that the filling opening lid (92) is displaceable from the closed position into a filling position in which it at least partially opens the filling opening (90), and vice versa. 56. table water can (10) according to Claim 55, characterized in that the table water can (10) comprises a cover coupling device (34) for the force-fit and / or form-fit coupling of the cover device (18) to the can container (14) or the can insert (16) in the closed position. 57. table water container according to Set 56, characterized in that the cover coupling device (54) is designed in the form of a first latching or snap-in connection device (56). 58 Table water container according to Set 56 or 57, characterized in that the lid device (18) comprises an undercut-free lid holding device (94) for holding the filling opening lid (92) on the lid (88) in a holding position in a purely force-locking manner. 59 Table water container according to one of the sets 55 to 58, characterized in that the filling opening cover (92) is configured such that it can be moved from the holding position into a separating position, in which the filling opening cover (92) is removed from the cover (88) and separated. 60th table water can according to one of the sets 55 to 59, characterized in that the filling opening cover (92) is designed to slide on the cover (88) when moving from the closed position into the filling position and vice versa. 61st table water counter according to one of the sets 55 to 60, characterised in that the cover device (18) comprises a locking device (106) for locking the filling opening cover (92) in at least one locking position. 62th table water container according to Set 61, characterized in that the at least one locking position defines the closed position and / or the filling position. 63. table water counter according to set 61 or 62, characterised in that the locking device (106) comprises interacting first and second locking elements (108, 110), which are arranged or formed on the one hand on the cover (88) and on the other hand on the filling opening cover (92), and that the interacting first and second locking elements (108, 110) are in engagement in a force-fit and / or form-fit manner in the at least one locking position. 64th table water pot according to Set 63, characterized in that the first and second locking elements (110, 318), which cooperate in the at least one locking position, are engaged by magnetic interaction. 65. table water container according to one of the sets 58 to 64, characterised in that the lid holding device (94) comprises a magnetic holding device (134) for magnetically holding the filling opening lid (92) on the lid (88) in the holding position by magnetic force action, in particular exclusively by magnetic force action. 66th table water pot according to set 65, characterized in that the magnetic holding device (134) comprises at least two interacting holding elements (136, 138), which are arranged or formed on the one hand on the filling opening lid (92) and on the other hand on the lid (88). 67 Table water container according to Set 66, characterized in that at least one of the at least two interacting retaining elements (136, 138) is magnetic, in particular is designed in the form of a magnet (140). 68th table water container according to set 67, characterized in that the at least one magnetic holding element (136) is arranged or formed on the filling opening cover (92). 69: Table water container according to one of the sets 54 to 68, characterised in that the container cover (52) closes the container insert (16) in the closed position. 70th table water can according to one of the sets 54 to 69, characterised in that the container cover (52) releases the spout (32) in the closed position. 71st table water can according to one of the sets 51 to 70, characterized in that the table water can (10) is designed as a table water filter can (12) for filtering water. 72: Table water container according to one of the sets 52 to 71, characterised in that the container insert (16), in the container insert position, adjoins the spout (32) and releases the latter. 73. table water can according to one of the sets 52 to 72, characterised in that the can container (14) comprises an insert coupling device (70) for force- and / or form-locking coupling of the can container (14) and the can insert (16) in the can insert position. 74 Table water fountain according to Set 73, characterized in that the insert coupling device (70) is designed in the form of a second latching or snap-in connection device (72). 75 Table water counter according to Set 73 or 74, characterized in that the insert coupling device (70) comprises interacting first and second insert coupling elements (74, 76) which are arranged or formed on the one hand on the counter container (14) and on the other hand on the counter insert (16), and in that the first and second insert coupling elements (74, 76) are in engagement in a force-fit and / or form-fit manner in the counter insert position. 76. table water fountain according to set 75, characterized in that the first and second insert coupling elements (74, 76) are designed in the form of second latching or snap-in connection elements (78, 80). 77. table water can according to one of the sets 54 to 76, characterised in that the can insert (16) can be removed from the can container (14) in the closed position.The following description of a preferred embodiment of the invention serves to explain it in more detail in conjunction with the drawing. The following are shown: FIG. 1 : a perspective overall view of an exemplary embodiment of a table water can; FIG. 2 is a sectional view taken along line 2- 2 in FIG. 1 ; FIG. 3 : a partial view of a can container of a table water can with the can insert removed; FIG. 4 : shows a schematic partial view of a table water can during the coupling of the container lid to the can container or the can insert; FIG. 5 is a sectional view along line 5- 5 in FIG. 3 with the can insert accommodated in the can container and with the container lid placed on; FIG. 6 is an enlarged partial view of the region A in FIG. 5 ; FIG. 7 : a top view of the table water can in the filling position; FIG. 8 is a top view of the container can similar to FIG. 7 in the closed position; FIG. 9 is a schematic exploded view of the container lid; FIG. 10 is a sectional view taken along line 10- 10 in FIG. 7 ; FIG. 11 is an enlarged partial view of the region B in FIG. 10 ; FIG. 12 is an enlarged partial view of the region C in FIG. 10 ; FIG. 13 is an enlarged partial view of the arrangement from FIG. 10 ; FIG. 14 is a partial cross-sectional view of the assembly of FIG. 8 taken along line 14- 14; FIG. 15 is a sectional view taken along line 15--15 in FIG. 10; FIG. 16 : a perspective exploded illustration of the filling opening cover; FIG. 17 : a sectional view of the filling opening cover in the region of the guide projection; FIG. 18 : a perspective view of the cover of the cover device from above; FIG. 19 : a perspective view of the cover from below with the holding element receptacle for a magnetizable holding element opened; FIG. 20 : an exploded view of a filter insert with a sectional view of the table water can for illustrating the region in which the filter insert is received in the can insert; FIG. 21 : a perspective view of a housing cover of the filter insert from below; FIG. 22 : a perspective view of the housing of the filter insert from above; FIG. 23 : a perspective view of a can insert from above; FIG. 24 is an enlarged partial view of the arrangement from FIG. 2 in the region of the filter insert with housing cover and housing of the filter insert in the inserted position before the engagement; FIG. 25 is a view similar to FIG. 24, but with a filter insert occupying the filter position; FIG. 26 : a partially cut exploded view of the table water can in the region of the can insert and the housing; FIG. 27 is a sectional view taken along line 27--27 in FIG. 25; FIG. 28 is a partial exploded view of a further exemplary embodiment of a cover device from below; FIG. 29 is a sectional view taken along line 29--29 in FIG. 28; FIG. 30 is an enlarged partial view of the arrangement from FIG. 29 ; FIG. 31 : a partial view of a further exemplary embodiment of a table water pot with an assumed filling opening cover; FIG. 32 : a top view of the exemplary embodiment of the table water pot according to FIG. 31 with the filling opening cover placed thereon in the filling position; FIG. 33 is a view similar to FIG. 32 with the table water can in the closed position; and FIG. 34 is a sectional view taken along line 34--34 in FIG. 32.FIGS. 1 to 27 schematically show an exemplary embodiment of a table water can, which is denoted overall by the reference numeral 10.The table water can 10 is designed as a table water filter can 12 for treating, in particular for filtering, water.The table water can 10 comprises a can container 14, a can insert 16, a cover device 18 and a filter insert 20.The can container 14 has an elongated oval shape, as can be seen easily in FIGS. 7 and 8 in particular in plan view. A circumferential edge protrudes from an underside 22, which edge forms a stand foot. Projecting from the underside 22 is a circumferential wall 28 which, when the table water pot is used as intended, extends counter to the direction of gravity, symbolized by the arrow 26 in FIG. 2.The wall 28 extends to an upper edge 30 of the can container 14.A spout 32 is formed on the can container 14, namely by a lateral bulge 34 of the wall 28 on a semi-hollow cylindrical wall section 36, and the wall section 36 connects two planar wall sections 38 and 40 running parallel to one another. Opposite the wall section 36 along a center line 42 running between the wall sections 36 and 38, which moreover runs in a plane of symmetry of the table water pot 10, a further semi-hollow cylindrical wall section 44 is formed, which also connects the wall sections 38 and 40.The table water can 10 comprises a can handle 46 which is arranged on the wall section 44. It comprises two curved sections which are integrally formed on the wall section 44 and are connected to one another via a grip section 48 running parallel to the wall section 28. Overall, a substantially U-shaped can handle 46 is thus formed. The can grip 46 serves to hold the table water can 10 with one hand. As described, it is arranged or formed laterally on the can container 14. The elements of spout 32 and can handle 46 formed on the one hand on the wall section 36 and on the other hand on the wall section 44 point in opposite directions and in each case away from the can container 14.The spout 32 formed laterally on the can container 14 extends as far as the upper edge 30. It can be clearly seen in FIG. 3 that the spout 32 forms a bulge 34 on the edge 30.The can container 14 defines a can container opening 50 in the region of the upper edge 30; the cover device 18 forming a container cover 52 serves to close said opening; in this exemplary embodiment, the container cover 42 is not directly coupled to the can container 14, but indirectly via the can insert 16. A cover coupling device 54 serves to couple the container cover 52 to the can container 14, and is designed to couple the cover device 18 to the can container 14 in a force-fit and / or form-fit manner, namely indirectly via the can insert 16.The cover coupling device 54 is designed in the form of a first latching or snap-in connection device 56. The lid coupling device 54 comprises interacting first and second lid coupling elements 58 and 60, which are arranged or formed on the one hand on the can insert 16 and thus indirectly on the can container 14 and on the other hand on the container lid 52.In a closed position, in which the container lid 52 closes the can container opening 50, the first and second lid coupling elements 58, 60 are in frictional and / or positive engagement, as can be seen clearly in FIG. 12. FIG. 1 also shows the closed position.The first and second cover coupling elements 58 and 60 are designed in the form of a cover coupling element projection 62 on the container cover 52 and a cover coupling element recess 64 corresponding thereto.The first and second cover coupling elements 58 and 60 are designed in the form of first and second snap-in or snap-in connection elements. The first cover coupling element forms a first latching element 66 in the form of a latching recess, the second cover coupling element 60 forms a first latching or snap-in connection element in the form of a latching nose, which engages in the latching recess in the closed position. This can be seen well in FIG. 12.The first cover coupling elements 58 are formed on the can insert 16 in the form of depressions which are open facing one another. They are formed on the one hand adjacent to the spout 32 and on the other hand adjacent to the can handle 46. Consequently, two first cover coupling elements 58 are therefore formed on the can insert 16, and two second cover coupling elements 60 are formed on the container cover 52.As shown in FIG. 4, the can insert 16 is accommodated in the can container 14 in an inserted position. The container cover 52 closes the can insert 16 in the closed position, as can be seen clearly in FIG. 2 in particular. In the closed position, the container cover 52 releases the spout 32. As can be seen clearly in FIG. 4, the can insert 16 likewise releases the spout 32 in the inserted position. However, it adjoins this, which can also be seen easily in the sectional view of FIG. 2.The table water can 10 further comprises an insert coupling device 70 for force- and / or form-locking coupling of the can container 14 and the can insert 16 in the insert position. The insert coupling device 70 is designed in the form of a second latching or snap-in connection device 72.The insert coupling device 70 comprises first insert coupling elements 74 and second insert coupling elements 76, which are arranged or formed on the one hand on the can container 14 and on the other hand on the can insert 16. In the inserted position, the first and second insert coupling elements 74 and 76 are in engagement in a force-fit and / or form-fit manner. The first and second insert coupling elements 74 and 76 are formed in the form of second snap-fit or snap-fit connection elements 78 and 80, respectively. They are in engagement in the use position, as can be seen clearly in FIG. 5 and in FIG. 6.The insert coupling device 70 comprises a total of four first insert coupling elements 74 and four corresponding second insert coupling elements 76. the four first insert coupling elements 74 are arranged or formed in the transition region between the wall sections 36 and 38 or 40 and 44, namely in the form of depressions which are formed somewhat below the edge 30 in an inner wall surface 82 of the wall 28.The second insert coupling elements 76 are formed in the form of short ribs 84 which extend parallel to an upper edge 86 of the can insert 16. The edge 86 is formed circumferentially and is elongated oval in a plan view. It fits against the wall 28 in the area of the edge 30, but does not follow the bulge 34.As can be seen easily in FIG. 3, the can insert 16 can be removed from the can container 14 in the closed position, i.e. with the container cover 52 coupled to the can insert 16. For this purpose, the container cover 52 therefore does not have to be removed from the can insert 16. Conversely, the can insert 16 can then also be inserted into the can container 14 with the container cover 52 placed on.As can be seen clearly in FIG. 2, the can insert 16 tapers slightly recessed from the edge 86 in the direction of the underside 22, when the can insert 16 is received in the can container 14 as intended.The further embodiment of the can insert 16 will be explained in more detail later in connection with the description of the filter insert 20.The embodiment of the cover device 18 will now be explained in more detail below.The lid device 18 comprises a lid 88 with a filling opening 90; it serves in particular for the purpose of filling the can container 14 when the lid device 18 is placed on. For closing the filling opening, the cover device 18 comprises a filling opening cover 92, The filling opening cover 92 is displaceable from a closed position, in which it closes the filling opening 90, for example as shown in FIG. 8, into a filling position, in which it at least partially opens up the filling opening 90. In FIG. 7, the filling position is schematically shown.The cover device 18 further comprises a cover holding device 94 which is undercut-free and is designed for purely force-locking holding of the filling opening cover 92 on the cover 88. This configuration makes it possible to bring the filling opening cover 92 from a holding position, in which the filling opening cover 92 is held on the cover 88, as is illustrated schematically in FIG. 10, for example, into a separating position, in which the filling opening cover 92 is removed from the cover 88 and separated. Fig. 9 shows such a situation. The exploded illustration of FIG. 9, in particular in the region of the filling opening cover 92, shows the coupling to the cover 88 without an undercut.The filling opening cover 92 is configured to slide on the cover 88 when moving from the closed position into the filling position and vice versa. For this purpose, the cover device 18 comprises a plurality of sliding elements 96, which are designed in the form of sliding projections 98. In the exemplary embodiment of FIGS. 1 to 27, the sliding elements 96 are arranged or formed on the filling opening cover 92.The sliding projections 98 are designed to project like knobs from an underside 100 of the filling opening cover. In total, four sliding elements 96 are formed on the filling opening cover 92, which sliding elements are positioned close to a circumferential edge 102. A sliding surface 104 interacts with the sliding elements 96, which sliding surface is arranged or formed on the cover 88. The sliding surface 104 is planar and defines the filling opening 90 laterally in sections. The sliding elements 96 bear against the sliding surface 104, namely during the displacement of the filling opening cover 92 from the closed position into the filling position and vice versa. This can be seen particularly well in FIGS. 13 and 14. FIG. 13 shows the filling position, and FIG. 14 the closing position.The cover device 18 comprises a locking device 106 for locking the filling opening cover 92 in at least one locking position. In the exemplary embodiment shown in FIGS. 1 to 27, the filling opening cover 92 is locked both in the closed position and in the filling position, as will be explained in more detail below. Consequently, the closed position as well as the filling position each define a locking position. In alternative exemplary embodiments, it is also conceivable to lock either only the closed position or only the filling position.The locking device 106 comprises interacting first and second locking elements 108 and 110 which are arranged or formed on the one hand on the cover 88 and on the other hand on the filling opening cover 92. The cooperating first and second locking elements 108 and 110 are in frictional and / or positive engagement in the at least one locking position.It can be clearly seen in FIGS. 7 and 8 that the first and second locking elements 108 and 110 form cooperating locking projections 112 and locking receptacles 114. In each case, two locking elements 108 are arranged in pairs opposite one another on an elongate guide receptacle, namely on a circumferential guide receptacle edge 118 delimiting the latter.The guide receptacle 116 is formed in the shape of a groove on the cover 88 and is set back in the direction of an interior 120 of the can container 14 with respect to the sliding surface 104. The first locking elements 108 are designed in the form of locking knobs 122. They are arranged adjacent to a free end 124 of the guide receptacle 116, namely in such a way that the second locking element 110, which is designed in the form of a locking projection 112 projecting from the filling opening cover 92 beyond the underside 100, can engage.The free end 124 is formed adjacent to the filling opening 90; opposite it, a further free end 126 of the guide receptacle 116 is bounded by the guide receptacle edge 118. Here too, two locking knobs 122 are positioned adjacent. The locking knobs 122, which each cooperate with one of the two ends 124 and 126, are positioned such that the locking projection 112 can latch or snap into the locking receptacles 114 bounded by the locking knobs 122 and the ends 124 and 126, respectively.FIG. 7 shows the locking protrusion 112 in cooperation with the end 126. The locked locking projection 112 thus defines the filling position of the cover device 18.A circumferential inner edge surface 128 is formed on the cover 88. The edge surface 128 defines stops 130 and 132 for the filling opening cover 92 acting in opposite directions. In the closed position, the filling opening cover 92 abuts the stop 130 adjacent to the filling opening 90. In the filling position, the edge 102 of the filling opening cover 92 abuts the stop 132.The edge surface 128 extends transversely, in the exemplary embodiment shown in the figures perpendicularly, away from the sliding surface 104.A contour of the edge surface 128 corresponds to an outer contour, thus the edge 102, of the filling opening cover 92 in such a way that the filling opening cover 92 and the edge surface 128 bear against one another in a planar or substantially planar manner both in the filling position and in the closed position. This can be seen clearly in particular in FIGS. 7 and 8 and also 13 and 14.In the exemplary embodiment shown in the figures, the cover holding device 94 comprises a magnetic holding device 134 for magnetically holding the filling opening cover 92 on the cover 88 in the holding position by magnetic force action. In the present embodiment, the filling port lid 92 is held on the lid 88 exclusively by magnetic force.The magnetic holding device 134 comprises two cooperating holding elements 136 and 138. The holding element 136 is arranged or formed on the filling opening cover 92 and the holding element 138 on the cover 88.The holding element 136 is magnetic. It is designed in the form of a magnet 140. The magnetic holding element 136 is designed rotationally symmetrically with respect to a holding element longitudinal axis 142. It comprises a retaining flange 144 protruding in the radial direction with respect to the retaining element longitudinal axis 142.The holding element 136 is held in a holding element receptacle 146. The holding element receptacle 146 is designed in the form of a recess on the locking projection 112. The holding element receptacle 146 is designed rotationally symmetrically with respect to the holding element longitudinal axis 142. It comprises an annular surface 148 pointing away from the underside 100, against which the retaining flange 144 bears. In order to retain the retaining element 136 in the retaining element receptacle 146, the retaining device 134 comprises a retaining element 150. It is of sleeve-shaped design and has a retaining flange 152 protruding in the radial direction with respect to the retaining element longitudinal axis 142. Projecting from a sleeve-shaped outer side are latching noses 154, which engage in latching recesses 156 on the holding element receptacle 146. An end face 158 on the end of the retaining member 150 remote from the retaining flange 152 abuts the retaining flange 144.To mount the magnet 140 on the filling opening cover 92, the procedure is as schematically shown in FIGS. 16 and 17. The magnet 140 is inserted with the retaining flange 144 at the front into the retaining element receptacle 146 parallel to the retaining element longitudinal axis 142. In order to fix the magnet 140, in the next step, the holding element 150 is then inserted into the holding element receptacle 146 with the end face leading, which is interrupted in the circumferential direction with respect to the holding element longitudinal axis 142 and is therefore formed only on individual spring tabs 160 surrounding the magnet 140 until the end face 158 abuts against the holding flange 144. The latching noses 154 slide into the latching recesses 156 and thus establish a latching connection between the retaining element 150 and the retaining element receptacle 146.The holding element 150 serves for the force- and / or form-fit holding of the holding element 136 in the holding element receptacle 146. As described, the retainer 150 and the retainer receptacle 146 are snap-connected together when retaining the retainer 136 within the retainer receptacle 146.The filling opening cover 92 is designed mirror-symmetrically with respect to a mirror plane 162 containing the longitudinal axis of the holding element.For handling the filling port lid 92, a rib 164 extending in the mirror plane 162 is formed on an upper surface of the filling port lid 92.The second holding element 138 is designed to be magnetizable in the exemplary embodiment shown in the figures. It is at least partially formed from a magnetizable material. This is a metallic material which contains iron, cobalt and / or nickel.The magnetizable holding element 138 is designed in the form of a holding strip 166. On an underside of the cover 88, a holder 168 for the holding strip 166 is formed. It comprises two laterally open grooves 170 facing each other, into which the holding strip 166 can be inserted parallel to the groove-shaped guide receptacle 116.To protect the holding strip 166 formed from a non-corrosion-resistant material from corrosion, a hood 172 is used, which forms a holding element receptacle 174. If the retaining strip 166 is inserted into the holder 168, the hood 172 can be pushed over the holder 168 in a next assembly step. To support the holding strip 166 along its extension, two guide webs 176 each having a recess 178 are arranged on an inner side of the hood 172, the holding strip 166 engaging in said recess when the hood 172 is placed on the holder 168. In this regard, reference is made in particular to FIGS. 13, 14 and 19.The retaining strip 166 extends in a displacement direction 180. This is defined in particular by a longitudinal axis of the guide receptacle 116. The holding strip 166 thus extends in the displacement direction 180 of the filling cover 92.In the exemplary embodiment described in the figures, the holding strip 166 has a length such that it interacts with the magnet 140 in any desired position of the filling opening cover 92 relative to the cover 88, that is to say both in the filling position and in the closed position and in any desired further position between these two extreme positions. The holding element 136 is thus in magnetic interaction with the holding strip 166 whenever the filling opening cover 92 is placed on the cover 88 as intended. The holding strip 166 is attracted by the magnet 140. In this manner, since the magnet 140 is held on the charge port cover 92, the charge port cover 92 is pulled against the cover 88.The hood 142 is welded to the cover 88, so that the holding element receptacle 174 is closed in a fluid-tight manner. The holding strip 166 is thus protected against corrosion.The cover device 18 further comprises a guide device 182 for guiding a movement of the filling opening cover 82 from the closed position into the filling position and vice versa. The guide means 182 includes cooperating first and second guide members 184 and 186. The first and second guide elements 184 and 186 are arranged or formed on the one hand on the filling opening cover 92 and on the other hand on the cover 88. In a guiding position, they are in engagement, in particular in a form-fitting manner. It should be noted that the cooperating first and second guide members 184 and 186 engage without undercut.The first and second guide elements 184 and 186 are designed in the form of a guide projection 188 and the guide receptacle 116 corresponding thereto. The guide projection 188, which therefore also forms the locking projection 112, engages in the guide receptacle 116 in the guide position and guides a movement of the filling opening cover 92 from the closed position into the filling position and vice versa.As already explained, the guide projection 188 protrudes from the underside 100 of the filling opening cover 92. In this exemplary embodiment, the guide projection 188 comprises the holding element receptacle 146.As explained, the holding element 136 in the form of the magnet 140 is arranged or formed on the guide projection 188. At least one locking element 108 interacting with the guide projection 188 is arranged or configured on the guide receptacle 116 for locking the filling opening cover 92 on the cover 88 in the described manner in the closed position and in the filling position. The locking elements 108 are arranged or formed on the encircling guide receiving edge 118 delimiting the guide receptacle 116, namely in the form of the locking knobs 122.The retaining strip 166 extends parallel to the groove-shaped guide receptacle 116. Thus, in this embodiment, the first and second support members 136 and 138 are associated with the first and second guide members 184 and 186.The first and second guide elements 184 and 186 are separated from one another by a narrow air gap 190 in the guide position. The cooperating guide elements 184 and 186 are practically contactless and thus permit a practically friction-free guidance of a movement of cover 88 and filling opening cover relative to each other.As already explained, one of the two guide elements 184 and 186, namely the guide element 184, also forms the second locking element 110 of the locking device 106.Adjacent the hood 172, an interchangeable display 192 is disposed on the underside of the cover 88. The change indicator 192 includes a rotatable wheel 194 which is divided into twelve equal sectors labelled numbers from 1 to 12. A marking 196 in the form of a short groove is formed on the hood 172, which extends in the direction of the displacement direction 180. When the filter cartridge 20 is changed, the respective month can be set on the change display 192 by aligning the number corresponding to the month with the mark 196. Thus, a user can immediately recognize when the filter insert 20 has been changed last time.The can insert 16 and the filter insert 20 will be described in more detail below. As already explained, the can insert 16 can be inserted into the can container 14 in a defined manner. FIG. 2 schematically shows that the can insert 16 is designed in a defined manner for receiving the filter insert 20 in the inserted position.The can insert 16 coupled to the can container 14 by means of the insert coupling device 70 has a circumferential can insert wall 198 which extends from the edge 86 in the manner of a funnel to a can insert base 200. When the can insert 16 is received in the can container 14, the can insert bottom 100 is spaced apart from the underside 22 of the can container 10. A distance 202 of the can insert base 200 from the underside 22 is approximately one third of a total height of the can container 14, which is predetermined by a distance of the edges 24 and 30 from one another.The can insert 16 narrows geometrically similar to the shape of the edge 86, so that any cuts through the can insert 16 parallel to a plane defined by the edge 86 are each elongated oval-shaped.On the can insert bottom 200, a can insert bottom opening 204 is formed, which is also elongated oval-shaped.On an inner wall surface 206 of the can insert 16, a plurality of guide ribs 208 are arranged or formed starting from the can insert bottom 200. They serve in particular for the centring guiding of the filter insert 20 when it is inserted into the can insert 16.In the exemplary embodiment of the can insert 16 shown in the figures, a total of six guide ribs 208 are provided. They each point into a can insert space 210 defined by the can insert 16 and project transversely, in particular perpendicularly, from the inner wall surface 206. The guide ribs 208 are of flat design and have a sliding surface 212 pointing into the can insert space 210. It serves to guide the filter insert 20 during insertion into the can insert 16 into a filter insert position, as is illustrated by way of example in FIGS. 2 and 25.The sliding surface 212 is in sections rectilinear and convexly curved in sections pointing in the direction of the can insert space 210. In FIG. 25, a straight section 214 and a curved section 216 are drawn. The rectilinear portion 214 extends from the can insert base 200 in the direction of the edge 30. It then merges into the convexly curved section 126 pointing in the direction of the can insert space 210, which section ends at the inner wall surface 206.The guide ribs 208 are designed such that they lie flat on the outside of the filter insert 20 when the filter insert 20 is received in the can insert 16.The filter insert 20 comprises a trough-shaped housing 218 with a housing opening 220 and a housing cover 222 for closing the housing opening 220 in a filter position. The housing 218 defines a housing receptacle 224 for receiving a filter element 226.The filter element 226 comprises a flexible, fluid-permeable filter bag 228 in which a filter material 230 is accommodated. The filter material 230 can optionally be designed for filtering out suspended materials and / or for demineralized water, in particular for decalcifying. For example, the filter material 230 may include a plurality of beads formed of an ion-exchanging material.The housing 218 defines a housing top side 232 on which the housing opening 220 is also formed, and a housing bottom side 234. The housing 218 tapers, similar to the can insert 16, from the housing top side 232 toward the housing bottom side 234.Two water outlets 236 are formed on the housing 218, namely on the housing bottom side 234. The two water outlets 236 are circular and are each closed by a net filter 238. The net filter 238 is of course fluid-permeable.A housing base 240 is formed to project from the housing bottom side 234. The water outlets 236, as can be seen easily in FIGS. 25 and 26, for example, are formed on the housing base 240. On the housing bottom side 234, a plurality of support webs 242 for the filter element 226 are formed. They protrude from the housing base 240 in the direction of the housing receptacle 224. They serve in particular the purpose of keeping the filter element 226 at a distance from the water outlets 236 and the mains filters 238.In the exemplary embodiments shown in the figures, three support webs 242 are provided. They extend transversely, namely perpendicularly, to a housing preferred axis 244. This is defined in particular as parallel to two housing opening edge sections 246, which run in a straight line and parallel to one another, of a housing opening edge 248 delimiting the housing opening 220.The housing base 240 of the filter insert 20 dips into the can insert base opening 204 when the filter insert 20 is accommodated in the can insert 16. This dipping is easily made possible by the guide ribs 208 with their sliding surfaces, which interact with the housing 218 of the filter insert and positively guide the latter in such a way that the housing base 240 is guided into the can insert base opening. The guide ribs 208 then lie flat against the outside of the housing 218, as can be seen clearly in FIGS. 2 and 25.The filter insert 20 comprises a housing cover guiding device 250 for defined engagement and closing of the housing 218 with the housing cover 222. It serves to guide a movement of the housing cover 220 relative to the housing when the filter insert 20 is transferred from an introduction position, in which the housing cover 222 is completely separated from the housing 218, into the filter position, in which the housing cover 222 closes the housing opening 220 of the housing 218. FIG. 26 schematically shows the introduction position.The housing cover guide device 250 comprises a slotted guide 252 for guiding a movement of the housing cover 222 relative to the housing 218 along a guide track 254. The guide track 254 is L-shaped in the exemplary embodiment shown in the figures. Consequently, it is therefore curved. Alternatively, the guide track 254 can also be formed in a straight line or U-shaped manner.The slotted guide 252 comprises at least two, in the exemplary embodiment shown in the figures, four, guide grooves 256. Two of the four guide grooves are each identically designed. The guide grooves 256 define the guide track 254.The guide grooves 256 extend in a housing wall 258 of the housing 218 as depressions which are open in the direction of the housing receptacle 224. They interrupt the housing opening edge 248 at an open end 260.From the housing opening rim 248, a circumferential rim flange 262 extends away from the housing opening 220. This peripheral flange 262 is likewise interrupted by the open ends 260 of the guide grooves 256. The rim flange 262 defines a rim seating surface 264. It extends outwardly away from the housing opening edge 248.Extending away from the rim support surface 264 is a circumferential can insert abutment rim 266. It points away from the housing receptacle 224. In the inserted position in which the filter insert 20 is inserted into the can insert 16, the can insert contact edge 266 lies flat against the circumferential can insert wall 198, which narrows from the can container opening 50 in the direction of a container base 268 of the can container 14. The can insert wall 198 defines the wall surface 206 defining the can insert space 210.The can insert abutment edge 266 is inclined relative to a can insert longitudinal axis 270 by an angle of inclination 274. The angle of inclination 274 is in the exemplary embodiment shown in the figures in a range from about 3° to about 12°.The can insert contact edge 266 serves in particular to seal the filter insert 20 relative to the can insert 16. The can insert wall 198, like the can insert contact edge 266, is inclined by the angle of inclination 274 relative to the can insert longitudinal axis 272. In the filter insert position, as is illustrated in FIG. 2, the can insert contact edge 266 thus divides the can insert space 210 into a region above the can insert contact edge 266 and into a region below the can insert contact edge 266. The guide ribs 208 are arranged or formed in the region below the can insert contact edge 266.The housing opening edge 248 further comprises two convexly curved housing opening edge sections 276 and 278 facing away from the housing opening 220, which connect the two linearly extending housing opening edge sections 246 to one another.The can insert abutment edge 266 does not have a constant width over its circumference. It is formed with a constant width in the area of the straight housing opening edge sections 246 and in the area of the curved housing opening edge section 276. As a result, the edge support surface 264 adjacent to the housing opening edge portion 276 broadens from the region adjacent to the housing opening edge rectilinear portions 246. On the opposite hand, however, the widening can insert support edge 266 in the region of the convexly curved housing opening edge section 278 has the result that the edge support surface 264 here has a constant width which corresponds to a width of the edge support surface 264 in the region of the rectilinear housing opening edge sections 246.This configuration also has an effect on the configuration of the guide track 254. It comprises a first track section 280 extending transversely, virtually perpendicularly, from the edge bearing surface 264 in the region of the rectilinear housing opening edge sections 246, and a second track section 282 adjoining the first track section, which runs substantially parallel to the edge bearing surface 264 and points in the direction of the housing opening edge section 278.The configuration of the guide grooves 256 for forming the guide tracks 254 and the configuration of the can insert contact edge 266 and the adjacent edge bearing surface 264 lead to a break in symmetry in the filter insert 20. This means that the filter insert is configured symmetrically to itself only with respect to a single plane of symmetry 284 containing the housing preferred axis 244. In a plane 286 running perpendicular thereto, however, the filter insert 20 is not configured as a whole mirror-symmetrically to itself.On the housing cover 222, guide members 288 surrounded by the slide guide 252 and interacting with the guide grooves 256 and engaging therein are arranged or formed. Each of the total of four guide members 288 is arranged on a spring element 290, which, when the guide members 288, which are oriented in pairs away from one another, are introduced into the guide track 254 provided for them in each case, deforms somewhat from a basic position in the direction of the housing receptacle 224.Each guide groove 256 is provided with a respective latching depression 292 which extends somewhat into a housing wall 294. It makes it possible to latch each guide member 288 with the associated guide track 254 in the filter position, in which the housing cover 222 closes the housing opening 220 in a defined manner. For this purpose, one of the latching recesses 292 is formed on each guide track 254 or guide groove 256, into which the associated guide member 288 latches or snaps when the filter position is reached. This is done in that, when engaging with the engagement recess 292, the spring element 290 springs back into the basic position in the direction away from the housing receptacle 224.The filter insert 20 thus comprises a housing cover locking device 296 for locking the housing cover 222 on the housing 218 in the filter position. The housing cover locking device 296 comprises the guide members 288 and the latching recesses 292 formed correspondingly thereto on the guide grooves 256.On the housing cover 222, which is designed to be completely separable from the housing 218, a plurality of elongated-hole-like water inlets 298 are formed. They form openings in the housing cover 222. They make it possible to flow water from the can insert space 210 above the filter insert 20 into the housing receptacle 224.The housing cover 222 is designed in the form of a flat trough and has a cover base 300 which is interrupted and thus forms an opening 302. Offset away from the cover base 300, a grip element 304 of U-shaped cross section is formed in the region of the opening 302. Consequently, two recessed grips 306 are formed on both sides of the grip element 304 on the housing cover 222 facing away from the housing receptacle 224. A user can thus engage with thumb and middle finger in each case in one of the two recessed grips 306 and grasp the housing cover 222 on the grip element 304. The handle element 304 extends transversely to the housing preferred axis 244.The water inlets 298 are formed both in the region of the two gripping depressions 306 and on the gripping element 304. Further, the opening 302 also forms a water inlet 298.The housing cover 222 comprises an outer circumferential cover edge 308 which defines a cover edge surface 310 pointing in the direction of the housing receptacle 224. The encircling cover edge 308 is connected via an oblique encircling annular wall 312 to the two gripping depressions 306 and the gripping element 304. The housing cover 222 and the housing 218 are matched to one another such that the cover edge 308 rests with the cover edge surface 310 on the edge bearing surface 264 in the filter position. The slotted guide 252 is furthermore configured such that, when the housing cover 222 is moved relative to the housing 218, the edge bearing surface 264 and the cover edge surface 310 remain aligned parallel to one another. As described, the housing cover 222 rests on the edge bearing surface 264 in the filter position.The guide grooves 256 of the slotted guide 252 are furthermore arranged and formed in such a way that the housing cover 222 contacts the housing 218 in the region of the curved housing opening edge section 276 when the guide members 288 and the guide grooves 256 come into contact and reaches as far as the can insert contact edge 266 in this region. The predefined first path section 280 initially moves the housing cover 222 in the direction of the housing receptacle 224 until the cover edge surface 310 rests on the edge bearing surface 264. The guide members 288 are now located in the transition region between the first and second track sections 280 and 282.The housing cover 222 can now be displaced parallel to the housing advancement axis 244 in the direction of the curved housing opening edge section 278 until the cover edge 308 abuts against the can insert contact edge 266 and then the cover edge surface 310 also contacts the edge contact surface 264 in the region of the curved housing opening edge section 278. During this displacement, the guide members 288 and the latching recesses 292 then latch as already described.The asymmetrical configuration of the housing 218 with respect to the plane 286 results in the fact that, in the filter position, the edge bearing surface 264 of the housing opening edge 248 is at least partially visible in the region of the curved housing opening edge section 276, which, when the guide members 288 and the guide grooves 256 come into contact with the housing cover 222. In this visible region of the edge bearing surface 264, a direction arrow 314 is arranged, which is visible in the filter position and indicates a displacement direction of the housing cover 222 relative to the housing 218 for transferring the filter insert 20 from the filter position into the introduction position.The housing advancement axis 244 is also defined by the housing aperture 220. As described, the housing cover 222 resting on the edge bearing surface 264 is displaceable parallel or substantially parallel to the housing preferred axis 244, specifically from the introduction position into the filter position.The housing cover 222 is formed symmetrically both with respect to the plane of symmetry 84 and with respect to the plane 286.The mode of operation of the bench filter can is explained briefly below.As already mentioned, the table water can 10 is designed as a table water filter can 12. To use the same, it must be prepared as schematically shown in Figs. 1 and 2. The can insert 16 is inserted into the provided can container 14 as described above. The filter insert 20 can now be inserted into the can insert 16. The can insert 16 is closed with the cover device 18.The table water filter can 12 can be filled with water when the container lid 52 is placed on. For this purpose, the filling opening cover 92 is transferred into the filling position. In the filling position, it is held by means of the locking device 106, so that it cannot automatically move into the closed position. Now, untreated water, for example directly from a faucet, can be filled through the filling opening 90 into the can insert 16. The introduced untreated water flows through the water inlets 298 on the housing cover 222 of the filter insert 20 into the latter and flows through the filter element 226. After flowing through the filter element 226, the water now treated exits the can insert 16 through one of the water outlets 236 and flows into the can container 14, where it collects and can be poured out of the can container 14 through the spout 32.When the filter element 226 is used up, the container cover 52 is removed from the can insert 16 and the filter insert 20 is removed in that the grip element 304 is gripped by a user and the filter insert 20 is thus lifted out. To open the housing 218, the housing cover 222 is transferred from the filter position into the introduction position in the direction of the directional arrow 314. In the inserted position, the housing cover 222 covers the region of the edge bearing surface 264 with the directional arrow 314. The guide members 288 are now each located in a position in the transition region between the first and second web sections 280, 282. The housing cover 222 can now be lifted from the housing 218 by a movement in the direction of the first path section 280. The filter element 226 can now be removed from the housing receptacle 224 and exchanged for a new, unused filter element 226.The housing 218 is closed in the reverse sequence. Subsequently, the filter insert 20 can be inserted again into the can insert 16. The guide ribs 208 ensure that the housing base 240 of the filter insert 20 is guided into the desired position, namely can enter the can insert base opening 204, specifically without tilting in the process. Finally, only the container cover 52 needs to be placed on the can insert 16. The table water filter can 12 is now ready again to filter or demineralize untreated water.FIGS. 28 to 30 show a further exemplary embodiment of a cover device 18, which differs from the cover device 18 according to the exemplary embodiment of FIGS. 1 to 27 merely in the design of the locking device 106. Only the differences of the two locking devices 106 will therefore be explained below. In addition, the same reference numerals are used to identify identical or functionally similar elements and components as in the exemplary embodiment of FIGS. 1 to 27.In the exemplary embodiment of FIGS. 28 to 30, the holding strip 166 is somewhat shorter than in the exemplary embodiment of FIGS. 1 to 27 A locking element 318 in the form of a magnetic holding element 320 is arranged adjacent to a free end 316 of the holding strip 166 which points in the direction of the filling opening 90. The magnetic retaining element 320 interacts with the magnetic retaining element 136 on the filling opening cover 92 in the closed position in order to retain and lock the filling opening cover 92 in the closed position in a defined manner. FIGS. 28 to 30 show the cover device 18 in each case in the closed position.If the edge 102 in the closed position abuts the stop 130, the magnet 140 is aligned over the magnetic holding element 320, which is likewise designed as a magnet 322. The magnets 140 and 322 are arranged such that, in the closed position, a south pole of one magnet is opposite a north pole of the other magnet, so that the two magnets 140 and 322 attract one another in the closed position. In the closed position, a greater magnetic holding force then acts between the two magnets 140 and 322 than between the magnet 140 and the holding strip 166. This greater holding force in the closed position is perceptible to the user. In order to move the filling opening cover 92 from the closed position into the filling position, it must therefore apply a somewhat greater force in order to overcome the magnetic holding force between the two magnets 140 and 322.The holder 168 in the embodiment of FIGS. 28 to 30 is somewhat modified with respect to the holder 168 in the embodiment of FIGS. 1 to 27. It has a magnet holder 324 facing the filling opening 90, into which the disk-shaped magnet 322 can be inserted. For this purpose, the magnet holder 324 is configured in the manner of a groove and is open, facing in the direction of the filling opening 90, for the insertion of the magnet 322.In this embodiment too, a hood 172 is provided which covers the holder 168. The hood 172 is also glued or welded to the cover 88 in this exemplary embodiment in order to enclose the holding strip 166 and the magnet 322 in a fluid-tight manner and thus to protect it from corrosion.As explained, in the exemplary embodiment of FIGS. 28 to 30, the locking device 106 is configured only to lock the closed position.Of course, the locking device 106 can also be designed such that locking is possible only in the filling position. In this case, the magnet 322 would then have to be positioned adjacent to the holding strip 166 at its free end facing away from the filling opening 90.If locking by magnetic holding forces is desired both in the closed position and in the filling position, magnetic holding elements 320 must be positioned at both free ends of the holding strip 166, as described.In the embodiment of FIGS. 28 to 30, the locking elements 110 and 318 are thus engaged by magnetic interaction.For the sake of good order, it should be noted that in the exemplary embodiment of FIGS. 28 to 30, no locking knobs 122 are arranged or formed on the guide receiving edge 118 of the guide receptacle 116. Thus, in this exemplary embodiment, no mechanical locking can take place in the filling position and the closing position. It is of course conceivable to mechanically lock that position which is not locked by magnetic interaction, specifically as explained in detail in the exemplary embodiment of FIGS. 1 to 27.FIGS. 31 to 34 schematically show a further exemplary embodiment of a cover device 18. Again, it only differs in the configuration of the locking device 106 from the exemplary embodiment of FIGS. 1 to 27.In the exemplary embodiment of FIGS. 31 to 34, no locking knobs 122 are arranged or formed on the guide receiving edge 118 of the guide receiving means 116. Nevertheless, in this exemplary embodiment as well, a locking of both the closed position and the filling position is realized purely mechanically. In this embodiment, the slide members 96 form locking projections 326. A total of four sliding elements 96 and thus four locking projections 326 are provided. Two locking receptacles 328 cooperate with the locking projections 326, which are formed on the cover 88 in the form of sliding surface depressions 330 in the sliding surface 104.The mode of operation of the locking device 106 in the exemplary embodiment of FIGS. 31 to 34 will now be explained briefly.When the filling opening cover 92 assumes the closed position, two of the four locking projections 326 enter the locking receptacles 328. In order to move the filling opening cover 92 into the filling position, the filling opening cover 92 must also be displaced away from the filling opening 90, as in the other exemplary embodiments. For this purpose, a somewhat increased force must be applied in order to disengage the locking projections 326 and the locking receptacles 328. If these are disengaged, the four sliding elements 96 slide on the sliding surface 104, as in the two other exemplary embodiments, until the filling opening cover 92 reaches the filling position.The sliding elements 96 are positioned on the filling opening cover 92 in such a way that the two other sliding elements 96 can now snap into the locking receptacles 328 on the cover 88. This snapping or snapping of the filling opening cover 92 onto the cover 88 is perceptible to a user. In order to move the filling opening cover 92 back into the closed position again, the procedure must be reversed. Here too, an additional force must again be applied first in order to disengage the locking projections 326 and the locking receptacle 328.The lid devices 18 of the embodiments of Figs. 1-27, 28-30 and 31-34 can be selectively connected to the described can insert 16. The mode of operation of the table water can 10 remains unchanged, so that reference can be made to the above description.The described embodiments of table water pots 10 make it possible to treat water, in particular tap water, in a simple manner. In addition, they are designed to be lasting, because in the case of the table water pots 10 described, filter elements 226 which have been used can be exchanged, and specifically without the housing 218 and the associated housing cover 222 also having to be exchanged. Thus, the filter cartridge 20 is reusable except for the filter element 226. Thus, only the component which is actually no longer usable has to be exchanged.List of reference characters10 Table water can 12 Table water filter can 14 Can container 16 Can insert 18 Lid device 20 Filter insert 22 Underside 24 Edge 26 Arrow 28 Wall 30 Edge 32 Spout 34 Bulge 36 Wall section 38 Wall section 40 Wall section 42 Center line 44 Wall section 46 Can handle 48 Handle section 50 Can container opening 52 Container lid 54 Lid coupling device 56 First latching or snap-in connection device 58 First lid coupling element 60 Second lid coupling element 62 Lid coupling element protrusion 64 Lid coupling element recess 66 First latching or snap-in connection element 68 First latching or snap-in connection element 70 Insert coupling device 72 Second latching or snap-in connection device 74 First insert coupling element 76 Second insert coupling element 78 Second latching or snap-in connection element 80 Second latching or snap-in connection element 82 Wall surface 84 Rib 86 Edge 88 lid 90 filling opening 92 filling opening lid 94 lid holding device 96 sliding element 98 sliding projection 100 underside 102 edge 104 sliding surface 106 locking device 108 first locking element 110 second locking element 112 locking projection 114 locking receptacle 116 guide receptacle 118 guide receptacle edge 120 interior 122 locking nub 124 end 126 end 128 edge surface 130 stop 132 stop 134 magnetic holding device 136 holding element 138 holding element 140 magnet 142 holding element longitudinal axis 144 holding flange 146 holding element receptacle 148 annular surface 150 holding element 152 retaining flange 154 latching nose 156 latching recess 158 end surface 160 tongue tab 162 mirror plane 164 rib 166 holding strip 168 holder 170 groove 172 hood 174 holding element receptacle 176 guide web 178 recess 180 displacement direction 182 guide device 184 first guide element 186 second guide element 188 guide projection 190 air gap 192 change indicator 194 196 Marking 198 Can insert wall 200 Can insert base 202 Distance 204 Can insert base opening 206 Wall surface 208 Guide rib 210 Can insert space 212 Slide-on surface 214 Rectilinear section 216 Curved section 218 Housing 220 Housing opening 222 Housing cover 224 Housing receptacle 226 Filter element 228 Filter bag 230 Filter material 232 Housing top side 234 Housing bottom side 236 Water outlet 238 Mesh filter 240 Housing base 242 Support web 244 Housing advancing axis 246 Housing opening edge section 248 Housing opening edge 250 Housing cover guide device 252 Slide guide 254 Guide track 256 Guide groove 258 Housing wall 260 Open end 262 Edge flange 264 Edge support surface 266 Can insert abutment edge 268 Container base 272 Can insert longitudinal axis 274 Angle 276 First housing opening edge section 278 Second housing opening edge section 280 First track section 282 Second track section 284 Plane of symmetry 286 288 guide member 290 spring element 292 latching depression 294 housing wall 296 housing cover locking device 298 water inlet 300 cover base 302 opening 304 grip element 306 grip depression 308 cover edge 310 cover edge surface 312 annular wall 314 direction arrow 316 free end 318 locking element 320 magnetic holding element 322 magnet 324 magnet holder 326 locking projection 328 locking receptacle 330 sliding surface depression

Claims

Filter insert (20) for a table water pot (10), wherein the filter insert (20) is designed for insertion into a pot container (14) of the table water pot (10), wherein the filter insert (20) comprises a housing (218) with a housing opening (220) and a housing cover (222) for closing the housing opening (220) in a filter position, and wherein the housing (218) forms a housing receptacle (224) for receiving a filter element (226), characterized in that the filter insert (20) comprises a housing cover guiding device (250) for guiding a movement of the housing cover (222) relative to the housing (218) when the filter insert (20) is transferred from an introduction position, in which the housing cover (222) is completely separated from the housing (218), into the filter position.Filter insert according to claim 1, characterised in that the housing cover guide device (250) comprises a slotted guide (252) for guiding a movement of the housing cover (222) relative to the housing (218) along a guide track (254), wherein in particular the guide track (254) is formed in a straight or curved manner, in particular in an L-shaped or U-shaped manner.Filter insert according to claim 2, characterised in that the slotted guide (252) comprises at least two, in particular four, guide grooves (256) and that the guide grooves (256) define the guide track (254).Filter insert according to claim 3, characterised in that the slotted guide (252) comprises at least two, in particular four, guide members (288) interacting with the guide grooves (256) and engaging in the latter, wherein in particular a) each guide member (288) latches with the associated guide track (254) in the filter position and / or b) on each guide track (254) a latching depression (292) is formed, into which the associated guide member (288) latches or snaps when the filter position is reached and / or c) each guide member (288) is arranged on a spring element (290), which, when being introduced into the guide track (254), deforms from a basic position in the direction of the housing receptacle (224) and, when being latched with the latching depression (292), springs back in the direction away from the housing receptacle (224) into the basic position, and / or d) the at least two guide members (288) are arranged or formed on the housing cover (222).Filter insert according to one of the preceding claims, characterized in that the filter insert (20) comprises a housing cover locking device (296) for locking the housing cover (222) on the housing (218) in the filter position, wherein in particular the housing cover locking device (296) comprises the at least two guide members (288) and the latching recesses (292) on the at least two guide grooves (256).Filter insert according to one of the preceding claims, characterized in that at least one water inlet (298) is formed on the housing cover (222), and in that at least one water outlet (236) is formed on the housing (218), wherein in particular a) the at least one water outlet (236) is closed by a net filter (238) and / or b) the at least one water outlet (236) is of circular form and / or c) the housing (218) tapers from a housing top side (232) which comprises the housing opening (220) to a housing bottom side (234) which comprises the at least one water outlet (236).Filter insert according to one of the preceding claims, characterized in that the housing cover (222) is designed to be completely separable from the housing (218).Filter insert according to one of the preceding claims, characterized in that the housing opening (220) is bounded by a housing opening edge (248), and in that a circumferential edge flange (262) extends away from the housing opening (220) from the housing opening edge (248).Filter insert according to claim 8, characterised in that the housing opening edge (248) comprises two housing opening edge sections (246) running straight and parallel to one another, and in that the housing opening edge sections (246) running straight run parallel to a housing advancement axis (244).Filter insert according to claim 9, characterised in that the housing opening edge (248) comprises two convexly curved housing opening edge sections (276, 278) facing away from the housing opening (220), and in that the curved housing opening edge sections (276, 278) connect the two linearly extending housing opening edge sections (246) to one another, wherein in particular the slide guide (252) is formed in such a way that the housing cover (222) contacts the housing (218) in the region of the one of the two curved housing opening edge sections (276) when the at least two guide members (288) and the at least two guide grooves (256) come into contact and in the filter position contacts the other of the two curved housing opening edge sections (278).Filter insert according to claim 10, characterised in that in the filter position an edge bearing surface (264) of the housing opening edge (248) is at least partially visible in the region of the one of the two curved housing opening edge sections (276) which, when the at least two guide members (288) and the at least two guide grooves (256) come into contact with the housing cover (222), wherein in particular on the visible region of the edge bearing surface (264) in the filter position a directional arrow (314) is arranged which indicates a displacement direction of the housing cover (222) relative to the housing (218) for transferring the filter insert (20) from the filter position into the introduction position.Filter insert according to one of claims 8 to 11, characterised in that the housing opening edge (248) comprises a can insert abutment edge (266) pointing away from the housing receptacle (224) and extending transversely to the edge bearing surface (264), which in an inserted position in which the filter insert (20) is inserted into the can insert (16) bears flat against a circumferential can insert wall (270) tapering from a can container opening (50) in the direction of a container base (268) of the can container (14), wherein in particular the can insert abutment edge (266) is inclined by an angle of inclination (274) with respect to a can insert longitudinal axis (272), wherein further in particular the angle of inclination (274) lies in a range of about 3° to about 12°.Filter insert according to one of claims 8 to 12, characterised in that the housing opening edge (264) has an edge bearing surface (264) pointing away from a housing underside (234) of the housing (218), wherein in particular a) the housing cover (222) in the filter position rests on the edge bearing surface (264) and / or b) the housing cover (222) comprises an outer circumferential cover edge (308) and that the cover edge (308) comprises a cover edge surface (310) resting on the edge bearing surface (264) in the filter position, wherein in particular the slotted guide (252) is formed such that when the housing cover (222) is moved relative to the housing (218) the edge bearing surface (264) and the cover edge surface (310) remain aligned parallel to one another, and / or c) the housing opening (220) defines a housing preferred axis (244) and that the housing cover (222) resting on the edge bearing surface (264) is displaceable parallel or substantially parallel to the housing preferred axis (244) and / or d) the guide track (254) has a guide track section (282) which extends parallel to the edge bearing surface (264) and / or e) the at least two guide grooves (256) are formed starting from the edge bearing surface (264) in a wall surface (294) of the housing (218) facing the housing receptacle (224).Filter insert according to one of the preceding claims, characterized in that at least one support web (242) for the filter element (226), which web protrudes in the direction of the housing receptacle (224), is formed on a housing underside (234) of the housing (218), wherein in particular the at least one support web (242) extends transversely, in particular perpendicularly, to the housing advancement axis (244).Filter insert according to one of the preceding claims, characterized in that at least one recessed grip (306) which is open in the direction away from the housing receptacle (224) is formed on the housing cover (222), wherein in particular the at least one water inlet (298) is formed in the region of the at least one recessed grip (306).Filter insert according to one of the preceding claims, characterized in that the housing (218) has a housing underside (234) and a housing base (240) projecting therefrom, wherein in particular a) the at least one water drain (236) is formed on the housing base (240) and / or b) the at least one support web (242) is formed on the housing base (240).Filter insert according to one of the preceding claims, characterized in that it comprises a filter element (226) with a flexible, fluid-permeable filter bag (228) and in that a filter material (230) is accommodated in the filter bag (228).Filter insert according to one of the preceding claims, characterized in that the housing cover (222) defines a housing preferred axis (244) and is formed symmetrically with respect to two mirror planes (284, 286) running perpendicular to one another, and in that one of the two mirror planes (284, 286) contains the housing preferred axis (244), wherein in particular the housing (222) is formed mirror-symmetrically with respect to a mirror plane (284) containing the housing preferred axis (244).A can insert (16) for insertion into a can container (14) of a table water can (10) in a defined manner, wherein the can insert (16) is designed to receive a filter insert (20) in an inserted position in a defined manner, characterized in that the filter insert (20) is designed in the form of a filter insert (20) according to one of the preceding claims.The can insert according to claim 19, characterized in that the can insert (16) has a can insert bottom (200) with a can insert bottom opening (204), wherein in particular a) the can insert bottom opening (204) is elongated oval and / or b) on an inner wall surface (206) of the can insert (16), starting from the can insert bottom (200), at least one guide rib (208) is formed for centering guidance of the filter insert (20) when inserted into the can insert (16), wherein in particular - a plurality of guide ribs (208) are provided which, when the filter insert (20) is received in the can insert (16), bear flat on the outside on the housing (218), and / or - the at least one guide rib (208) has a sliding surface (212) interacting with the housing (218), wherein in particular the sliding surface (212) is curved in a rectilinear manner in sections and convexly in sections pointing in the direction of the housing receptacle (224), and / or c) the housing base (240) of the filter insert (20) dips into the can insert base opening (204) when the filter insert (20) is received in the can insert (16).Table water pot (10) comprising a pot container (14) having a pot container opening (50) for filling water and a spout (32) for pouring water, wherein the pot container (14) is designed to receive a filter insert (20) for filtering water received in the pot container (14), characterized bya filter insert (20) according to one of claims 1 to 18.Table water can according to claim 21, characterised in that the can container (14) comprises a can insert (16) for receiving unfiltered water and that the can insert (16) is received in the can container (14) in a can insert position for separating container regions for untreated and treated water, wherein in particular the can insert (16) is designed in the form of a can insert (16) according to claim 19 or 20.Table water can according to claim 21 or 22, characterised in that the table water can (10) comprises a container lid (52) for closing the can container opening (50) in a closed position, wherein in particular the container lid (52) is designed in the form of a lid device (18), that the lid device (18) comprises a lid (88) with a filling opening (90), in particular for filling the can container (14) when the lid device (18) is placed on, and a filling opening lid (92) for closing the filling opening (90) in a closed position, and that the filling opening lid (92) is displaceable from the closed position into a filling position in which it at least partially releases the filling opening (90), and vice versa.

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