System for releasably mounting a portable object

Abstract

The invention relates to a system for releasably mounting a portable object, comprising a securing device for attaching the system to a belt element; a housing device for enclosing the portable object; a cassette device provided on the housing device; and at least one pair of magnets, a first magnet of the pair of magnets being provided on the cassette device and a second magnet of the pair of magnets being provided on the securing device, wherein when the housing device is resting against the securing device, the holding force of the first magnet of the pair of magnets in relation to the second magnet of the pair of magnets keeps the securing device and the housing device in contact with each other so as to fix the position thereof.

Description

[0001] System for a detachable mount for a portable object

[0002] A user of a portable everyday item wants it to be readily accessible and available in daily life with minimal effort. Such a portable everyday item could be, for example, a wallet, a card holder, a set of keys, or a smartphone. Particularly with smartphones, users want to keep them close to their body while still ensuring easy access to them.

[0003] Normally, users carry their smartphones in a trouser or jacket pocket and pull them out when needed. However, this process is both time-consuming and requires a certain degree of coordination, especially if the pocket contains other items such as keys, a wallet, or similar belongings. When pulling out the smartphone, the user must be careful that these other items don't accidentally fall out. Furthermore, carrying the smartphone in a trouser pocket in this way can lead to scratches on the smartphone's display due to contact with other items such as coins or keys.

[0004] Therefore, existing technology includes lanyards attached to smartphone cases, which the user can wear around their neck, similar to a shoulder bag. While the lanyard makes the smartphone accessible outside of a trouser pocket, it hangs relatively uncontrolled along the user's torso and can swing back and forth with the user's movements. This can cause the smartphone to collide with surrounding objects during rapid movements, potentially damaging the device. Furthermore, the uncontrolled position of the smartphone on the user's torso is often perceived as bothersome.

[0005] Such shoulder straps are also disadvantageous when the user is carrying a backpack, shoulder bag, handbag, or similar item, as this can lead to an undesirable collision between the shoulder strap and a strap of the bag or handbag. Furthermore, the user cannot adjust the distance to their smartphone using the shoulder strap, meaning the smartphone is always positioned at the same distance from the user. Therefore, the object of the present invention is to provide a system for a detachable holder for a portable object that ensures easy and flexible access to the portable object for the user while simultaneously providing improved storage security for the portable object.

[0006] To solve the problem, a first system according to the invention is proposed for a detachable holder for a portable object, comprising a fastening device for mounting the system on a belt element, a housing device for enclosing the portable object, a cassette device arranged on the housing device, and at least one pair of magnets. A first magnet of the magnet pair is arranged on the cassette device, and a second magnet of the magnet pair is arranged on the fastening device. In a position in contact with the housing device, an adhesive force of the first magnet of the magnet pair against the second magnet of the magnet pair holds the fastening device and the housing device in a fixed position relative to each other.

[0007] The portable item can be a wallet, a card case, a key ring, a storage box and especially a smartphone, the item preferably being operable by the user with one hand.

[0008] The fastening device is the component of the system that is directly connected to the strap element. A strap element could be, for example, a shoulder strap, a belt, or the carrying strap of a handbag or backpack. The fastening device can therefore be positioned relatively close to the user's body. The strap element can be made of a flexible, textile or leather-based material. Alternatively, a bicycle handlebar or stroller handle could also be considered a strap element. The fastening device can be made of a plastic-based material and, for example, manufactured using a 3D printing process.

[0009] The housing device describes an enclosure adapted to the portable object, for example, a smartphone case, a cover or case for a card holder or wallet, or a housing attached to a key ring. According to the invention, the housing device encloses the portable object in such a way that it cannot be easily removed from the housing device. The housing device can be made of a plastic-based material and can be manufactured, for example, by means of a 3D printing process. Furthermore, the system includes a cassette device that is arranged on the housing device. Preferably, the cassette device is arranged inside the housing device and is designed as part of a wall of the housing device, so that the housing device and the cassette device form a single component unit.Alternatively, the cassette device can also be arranged externally on a wall of the housing device. The cassette device can be made of a plastic-based material and, for example, manufactured using a 3D printing process.

[0010] The system according to the invention further comprises at least one pair of magnets. The magnet pair consists of two magnets, each preferably designed as a permanent magnet, for example, a neodymium magnet. Preferably, the magnets are matched in size and have a similar dimension. Furthermore, preferably, the magnets are designed to be relatively flat, so that both the cassette device with the first magnet and the mounting device with the second magnet can be designed to be relatively flat. This results in an advantageously space-saving and compact design for the system according to the invention.

[0011] The magnets, through the magnetic attraction between them known as the holding force, hold the housing and the mounting device in contact with each other. This holding force between the magnets acts as a clamping force, which also holds the cassette to the mounting device. This clamps the housing between the cassette and the mounting device, thus indirectly holding it in place.

[0012] The term "fixed in place" means that a surface of the housing device rests against a surface of the mounting device and that these two surfaces are virtually immovable relative to each other. The term "fixed" is to be interpreted as meaning that virtually no translational movement of the housing device relative to the mounting device is permitted in any three spatial directions.

[0013] Naturally, the number of magnet pairs can also be adjusted to the weight of the portable item. For example, four magnet pairs might be used for a detachable smartphone holder, while only two magnet pairs would be needed for a comparatively lighter card case. In this case, the holding force between the housing and mounting device can range from 1 N to 100 N. Furthermore, a force perpendicular to the holding force can also be applied between 0.5 N and 50 N when the housing and mounting device are in contact.

[0014] In the context of the invention, a "contact position" refers to the position in which the housing device is arranged in contact with the mounting device. The holding force of the magnet pair is so strong that the housing device is magnetically fixed to the mounting device. This fixation via the magnet pair occurs regardless of whether the cassette device is arranged outside or inside the housing device, or is formed integrally with the housing device. Therefore, in the contact position, the housing device—and thus any portable object arranged in or on the housing device—cannot be easily detached from the mounting device. Detachment only occurs by overcoming the holding force, for example, by manually removing the housing device.Until the housing device is released, the housing device is thus in a position adjacent to the fastening device and in a storage position.

[0015] Overcoming the adhesive force can be achieved by the user by deliberately removing the housing or portable item from the mounting device. The portable item is then freely available to the user. As the housing and item approach the mounting device, the adhesive force acting between the magnets of the magnet pair increases. Once the distance is sufficiently small, the adhesive force is strong enough to hold the housing to the mounting device. The user can then release the housing or item. While the user is using the portable item, it remains in a working position.

[0016] The system according to the invention allows the user to keep the portable item close to their body at all times, outside of a trouser pocket, handbag, or backpack, via the strap element. This advantageously reduces the spatial distance between the portable item and the user. Furthermore, the portable item can be moved particularly easily from the storage position to the usage position, as the user only needs to overcome the adhesive force manually. The user thus has relatively uncomplicated access to their portable item at all times. The use of magnets has the advantage that the user can detach the housing, along with the item, from the fastening device and thus from the strap element with just one hand and a single movement of the hand away from the fastening device.This is not possible with many differently designed housing devices that fix the object by clamping, using rubber bands, or similar means.

[0017] Preferably, a coupling projection with a first end is arranged on the fastening device and the cassette device has a cassette opening, wherein the first end of the coupling projection can be inserted into the cassette opening and wherein the cassette device can be positively connected to the first end of the coupling projection inserted into the cassette opening.

[0018] The coupling projection is preferably polygonal, particularly preferably hexagonal, with the cassette opening being adapted to the shape of the coupling projection. More preferably, the coupling projection and the fastening device are formed integrally, so that the coupling projection and the fastening device constitute a single component. The coupling projection and the cassette opening are configured with a key-and-lock mechanism. The coupling projection can thus be inserted into the cassette opening and subsequently connected to the cassette device or the housing device, so that the housing device is fixed relative to the fastening device.

[0019] To allow the coupling projection to be inserted into the cassette opening, the housing device can have a housing opening that is aligned with the cassette opening. Advantageously, the housing opening can have approximately the same geometry as the cassette opening.

[0020] The positive-locking connection between the coupling projection and the cassette assembly allows the portable object to be mounted on the mounting device with particular security and robustness. To release the housing assembly from the mounting device, the housing assembly, together with the cassette assembly, must be moved away from the mounting device along the coupling projection, so that the coupling projection is moved out of the cassette opening. The coupling projection thus defines a release direction along its longitudinal extent, along which the housing assembly is moved to dislodge the coupling projection from the cassette opening. In particular, positioning the coupling projection within the cassette opening can reduce or prevent lateral movement of the housing assembly, together with the cassette assembly, relative to the mounting device, i.e., perpendicular to the release direction.Furthermore, with appropriate design of the coupling projection and the cassette opening, rotation of the housing assembly, including the cassette assembly, relative to the mounting device can be reduced or prevented. In addition, appropriate design of the coupling projection and the cassette opening can allow the housing assembly, including the cassette assembly, to be positioned on the mounting device in a desired orientation relative to the mounting device.

[0021] The coupling projection is preferably polygonal, particularly preferably hexagonal, with the cassette opening being adapted to the shape of the coupling projection. Furthermore, the coupling projection and the fastening device are preferably formed integrally, so that the coupling projection and the fastening device constitute a single component.

[0022] Preferably, the cassette device has a first switching unit adjustable between a release position and a closed position, which is movable relative to the housing device and the fastening device for adjustment between the release position and the closed position, wherein the first switching unit can be positively connected to the first end of the coupling projection inserted into the cassette opening in the closed position and releases the first end of the coupling projection in the release position.

[0023] The first switching unit is therefore at least partially movable independently of the housing device and the mounting device and can switch between the release position and the closed position.

[0024] When the first end of the coupling projection is positioned in the cassette opening and the first switching unit is in the closed position, the first end of the coupling projection is positively locked and fixed in contact with the cassette assembly. Detaching the housing assembly from the mounting device is then no longer easily possible, even if the holding force required to separate the magnet pair is exceeded. With the coupling projection inserted into the cassette opening and the cassette assembly subsequently switched to the closed position, the housing assembly is fixed relative to the mounting device. In the closed position, the coupling projection and the first switching unit thus form a locking mechanism.The locking mechanism can secure the position of the cassette device relative to the coupling projection or – with a suitably designed geometry of cassette opening and coupling projection – both the position and the orientation of the cassette device relative to the coupling projection.

[0025] If, however, the first switching unit is in the release position, the housing assembly is still held in contact with the mounting device by the first end of the coupling projection and the magnet pair, but can be released from the mounting device by movement in the release direction if the holding force is exceeded. In the release position, the first coupling projection is therefore not secured in the cassette opening on the cassette device. The first switching unit thus allows the housing assembly, including the cassette device, to be secured to the mounting device particularly easily.

[0026] To solve the problem, a second system according to the invention is proposed for a detachable holder for a portable object, comprising a fastening device for arranging the system on a belt element, a housing device for enclosing the portable object, and a cassette device arranged on the housing device.In this arrangement, a coupling projection with a first end is arranged on the fastening device, and the cassette device has a cassette opening, wherein the first end of the coupling projection can be inserted into the cassette opening, wherein the cassette device has a first switching unit adjustable between a release position and a closed position, which is movable relative to the housing device and the fastening device for adjustment between the release position and the closed position, and wherein the first switching unit can be positively connected to the first end of the coupling projection inserted into the cassette opening in the closed position and, in a position in contact with the housing device on the fastening device, holds the housing device in contact with the fastening device in a fixing manner, and in the release position releases the first end of the coupling projection.

[0027] The second system differs from the first in that it does not have a pair of magnets. The releasable holding of the portable object is initially achieved solely through the interaction of the coupling projection of the fastening device with the cassette opening of the cassette device and via the first switching unit. For details regarding the portable object, the fastening device, the strap element, the housing device, the cassette device, the coupling projection, the holding mechanism, and the first switching unit, please refer to the descriptions of the first system.

[0028] The second system according to the invention offers the advantage over the first system that no pair of magnets is required. This makes manufacturing the system components simpler and more cost-effective. When the first switching unit is in the release position, the user can detach the housing from the mounting device without overcoming any potential holding force. When the first switching unit is in the closed position, the housing is securely held on the mounting device. The first switching unit thus enables the housing to be fixed to the mounting device and, consequently, the object to be held on the mounting device or the band element even without magnets.

[0029] The following configurations are applicable to both the first system with at least one pair of magnets and the second system without the pair of magnets, unless explicitly described otherwise.

[0030] Preferably, the first switching unit has a first locking washer with a first recess that defines a first inner contour, wherein the first end of the coupling projection has a first cylindrical surface and a first groove extending along the first cylindrical surface, wherein in the closed position the first inner contour interacts with the first groove and positively connects the first end of the coupling projection with the first locking washer of the cassette device.

[0031] The first locking washer is part of the first switching unit and essentially ensures the positive locking connection between the coupling projection and the cassette device. Starting with the situation where a user holds the portable object in their hand, they first guide it towards the fastening device. If the cassette device is in a closed position, it is then moved into a release position, for example, by manual actuation.

[0032] The user then brings the portable object to the first end of the coupling projection and partially inserts it into the cassette opening. The portable object, within the housing device containing the cassette, is manually guided over the first recess of the first switching unit and, if necessary, along a portion of the first outer surface of the first coupling projection and over the first inner contour of the first locking washer, until the first groove of the first coupling projection and the first inner contour of the first locking washer are approximately in the same plane. This can be achieved by manually guiding the portable object or the first recess along a central axis around which both the first recess and the first end of the coupling projection extend.The central axis of the first recess and the first end of the coupling projection is arranged orthogonally to the plane in which the first groove and the first inner contour interact. The first end of the coupling projection is thus initially inserted into the cassette opening with the first switching unit in the release position, but is not yet positively connected to the cassette device. The portable object can therefore initially be positioned abutting the mounting device when the first switching unit is in the release position.

[0033] When the first switching unit is moved from the release position to the closed position by the first locking washer, the first locking washer engages positively with the first end of the coupling projection, thus securing the portable object against the mounting device. In other words, the first locking washer engages the first groove of the coupling projection via its first inner contour, so that after the first locking washer moves from the release position to the closed position, the positive connection is created and the portable object is held close to the body and securely attached to the mounting device.By switching from the release position to the closed position, axial movement of the cassette device, and thus axial movement of the portable object along the central axis, is no longer possible, as the axial movement is blocked by the engagement of the first recess via the first inner contour into the first groove of the first end of the coupling projection. Only by switching from the closed position to the release position is the blockage released and the portable object freed.

[0034] In detail, the positive locking connection can be released by disengaging the first locking washer from the first groove, thus releasing the coupling projection of the cassette device. The cassette device is moved from the locked position to the unlocked position, and the user can once again freely access the portable item. The first locking washer allows the user to easily switch the cassette device between the locked and unlocked positions.

[0035] Preferably, the first switching unit is adjustable between the closed and released positions by rotating the first locking disc. This rotation can, for example, be initiated by the user by manually turning the first locking disc.

[0036] In the release position, the inner contour of the first locking washer does not engage with the first groove of the first end of the coupling projection. Only through the rotation of the first locking washer does its inner contour engage with the first groove in such a way as to form the positive locking connection. This rotation allows for particularly easy switching between the release and closed positions of the cassette device, enabling relatively simple release and establishment of the positive locking connection. The housing device is therefore particularly easy for the user to detach from the mounting device, especially since the user, by grasping the housing device or the object, also initiates the rotation of the locking washer.

[0037] The rotating design of the locking disc allows the mechanism for securing the coupling projection to the cassette assembly to be very compact. Furthermore, the rotation of the locking disc can be initiated by a relatively small hand movement from the user.

[0038] In an alternative design, the locking disc is moved translationally between the release position and the closed position.

[0039] Preferably, the first inner contour of the first locking washer is adapted to the first lateral surface of the first end of the coupling projection. Within the scope of the invention, "adapted" means that the inner contour and the first end have a geometry that is at least partially similar or identical. For example, the first end of the coupling projection can have a hexagonal geometry and the first inner contour can have a hexagonal shape. Due to the adapted geometries, the cassette assembly with the first locking washer can be positioned with particular precision on the coupling projection in the release position. In the release position, there is advantageously little play between the lateral surface and the inner contour. Furthermore, in the case of a non-circular design, rotation of the coupling projection relative to the locking washer can be prevented.In the closed position, the adapted first inner contour ensures that the positive locking connection is particularly stable and reduces the likelihood of unintentional loosening. In particular, with a symmetrical design of the inner contour and the first end of the coupling projection, the locking washer engages uniformly along the circumference in the groove of the first end of the coupling device, thus guaranteeing a particularly reliable locking mechanism.

[0040] The portable object can thus be arranged on the mounting device in a particularly stable and secure manner. Naturally, other geometries for the first end of the first coupling projection or for the first lateral surface and the first inner contour are also conceivable within the scope of the invention, for example, an elliptical, quadrilateral, or octagonal shape. In principle, any non-circular shape is possible.

[0041] Preferably, the first switching unit comprises a first switching device, wherein a translational movement of the first switching device along a side surface of the housing device causes a rotation of the first locking disc. The switching device enables indirect rotation of the locking disc. This can facilitate adjustment of the switching unit between the release and closed positions by the user. Preferably, the locking disc is arranged completely within the cassette device, and the switching unit can be actuated by the user from outside the cassette device. The first switching device can be arranged on a side surface of the housing device or extend to this side surface, for example, into a recess in the housing device, preferably through the recess. The translational movement is thus carried out almost parallel to a side surface of the housing device.

[0042] By connecting the first switch assembly and the first locking washer, the first locking washer can be rotated directly by the translational movement of the first switch assembly, for example by means of a rack and pinion mechanism or a cam control. The connection is preferably designed such that the rotational movement of the first locking washer causes the movement, particularly the translational movement, of the first switch assembly. Preferably, the first switch assembly has an actuating surface with a texture, so that the user can easily locate and move the first switch assembly by touch.

[0043] Preferably, the first locking disc has at least one detent section that holds the first locking disc in the release or closed position. The detent section interacts with a section of the cassette device adapted to it, so that the detent section and the adapted section form a locking mechanism. Depending on the design of the detent section, switching to the respective position may require more or less force from the user. Preferably, the detent section has partially rounded contours that interact with similarly rounded contours of the adapted section of the cassette device, so that moving the disc into a detent position corresponding to the release or closed position is advantageously gentle on the material.

[0044] The user receives haptic feedback indicating a completed switching operation to the release or closed position through the latching action. Furthermore, the latching action prevents unintentional switching between the release and closed positions, thus enabling particularly reliable operation of the system according to the invention.

[0045] Preferably, the cassette device has a first and a second side element, wherein the first and / or the second side element has a guide structure for the rotation of the first locking disc and / or the translational movement of the first switch device, and wherein the first locking disc and / or the first switch device are arranged sandwich-like between the first and the second side element.

[0046] The guide structure enables relatively low-resistance rotation of the first locking washer or translational movement of the first switch assembly within the cassette device. Furthermore, the sandwich-like arrangement reduces the probability of the first locking washer and / or the first switch assembly rotating or moving in a direction other than intended. In other words, the first locking washer and the first switch assembly are held or guided in the desired position. The side elements can be designed as parts of a cassette device housing. The guide structure can have projections, grooves, and recesses by means of which the guide structure is adapted to sections of the first locking washer and / or the first switch assembly.The first and / or second side element can be made of plastic and, for example, manufactured using a 3D printing process. Furthermore, it is also possible for at least one of the side elements to be made of a metallic material and / or a fiber-reinforced material.

[0047] The sandwich-like arrangement of the first locking disc and the first switching device allows the cassette assembly to be designed particularly compactly, which in turn results in an advantageously compact design for the assembly consisting of the housing and cassette assembly. This compact design has the advantage that the entire system is comparatively flat and has a center of gravity that is advantageously located close to the belt element and thus close to the user's body. The system according to the invention is therefore particularly comfortable for the user to wear.

[0048] Preferably, the first magnet of the at least one pair of magnets is arranged on the side element of the cassette device facing the mounting device. This arrangement advantageously results in a small spatial distance between the first magnet and the second magnet, which is located on the mounting device, when the housing device is in contact with the mounting device. This leads to a comparatively strong holding force of the magnet pair when the housing device is in contact with the mounting device, thus ensuring a particularly reliable hold of the housing device on the mounting device.

[0049] The first magnet can be positioned on an inward-facing or outward-facing surface of the side element. The side element can have a recess adapted to the first magnet, allowing for a particularly space-saving arrangement. Alternatively, the first magnet can be positioned within a through-hole in the side element. Such an arrangement allows for an even more compact design of the cassette device.

[0050] Preferably, the coupling projection has a second end opposite the first end, wherein the second end of the coupling projection can be positively or frictionally connected to the fastening device. The coupling projection according to this embodiment is designed as a separate component. Preferably, the first and second ends of the coupling projection are mirror images of each other, with the second end pointing in the opposite direction to the first end. The first end can still be positively or frictionally connected to the cassette device according to the above descriptions.

[0051] The housing assembly can be detached from the mounting device either by releasing the cassette assembly from the coupling projection or by releasing the housing assembly, including the coupling projection, from the mounting device. In the latter case, the coupling projection remains attached to the housing assembly and can assist the user in holding the object or the housing assembly.

[0052] Alternatively, after the portable object is detached, the coupling projection can be positioned on the fastening device via its second end, allowing the portable object to be used relatively freely and without the previously described coupling projection acting as a retaining element. Since the second end is connected to the fastening device, the first end of the coupling projection is then exposed after the portable object is detached.

[0053] The second end of the coupling projection can be connected to the fastening device, for example, via a recess in the fastening device that is adapted to the second end of the coupling projection, or via a surface of the fastening device.

[0054] Preferably, the fastening device has a fastening opening, wherein the second end of the coupling projection can be inserted into the fastening opening, wherein the fastening device has a second switching unit adjustable between a release position and a closed position, and wherein the second switching unit can be connected, in particular positively, to the second end of the coupling projection inserted into the fastening opening in the closed position and releases the second end of the coupling projection in the release position.

[0055] The mounting opening is a recess adapted to the second end of the coupling projection, and the recess may have the form of a through-hole. The mounting opening is located on a surface of the mounting device that faces the mounting device when the housing device is held against it. After bringing the portable object, housing device, or cassette device with a coupling projection attached to it into position against the mounting device, the user can insert the second end of the coupling projection into the mounting opening.

[0056] The fastening device features an adjustable second switching unit. When the second end of the coupling projection is inserted into the fastening opening, the second switching unit—similar to the first—can switch between a release position and a closed position. In the closed position, the second end of the coupling projection can be positively connected to the fastening device, and in the release position, it can be detached. The coupling projection—and thus the portable object—can therefore be fixed to the fastening device and thus to the strap element via the second switching unit.

[0057] Preferably, the second end of the coupling projection and the second switching unit are designed in the same way as the first switching unit and the first end of the coupling projection. Reference is made to the above explanations in this respect.

[0058] Preferably, the second switching unit has a second locking washer with a second recess defining a second inner contour, wherein the second end of the coupling projection has a second cylindrical surface and a second groove extending along the second cylindrical surface, and wherein, in the closed position, the second inner contour interacts with the second groove and the second end of the coupling projection can be positively connected to the second locking washer of the second switching unit.

[0059] Preferably, the interaction between the second locking washer and the second end of the coupling projection occurs in the same manner as the interaction between the first locking washer and the first end of the coupling projection. Reference is made to the above descriptions in this respect. The coupling projection can thus be positively connected to the cassette device via its first end and by means of the first locking washer, and to the fastening device via its second end and by means of the second locking washer, each independently of the other. The second locking washer is designed similarly to or identically to the first locking washer, so that the positive connection is achieved through the interaction of the second inner contour of the second recess with the second groove, which runs along the second cylindrical surface.

[0060] Preferably, the second recess is adapted to the geometry of the second end of the coupling projection, such that, for example, a hexagonal second recess and a correspondingly extending second inner contour interact with a hexagonally shaped second end of the coupling projection and a correspondingly extending second cylindrical surface or a second groove extending along the second cylindrical surface.

[0061] Preferably, the second switching unit is adjustable between the closed position and the release position by rotating the second locking disc.

[0062] The rotation can occur about a central axis extending through the center point of the second recess. This rotation can be effected by a second switching device. The second switching device and its function are preferably designed in the same way as the first switching device, so reference is made to the above descriptions. The rotation allows the second locking disc to be moved particularly easily from the closed position to the released position and vice versa. The second switching device can preferably be arranged on a side surface of the mounting device opposite the side surface of the housing device on which the first switching device is located. In other words, the first and second switching devices can point in opposite directions.

[0063] Preferably, the second inner contour of the second locking washer is adapted to the second lateral surface of the second end of the coupling projection.

[0064] Advantageously, the descriptions of the design of the first inner contour, the first locking washer, the first end of the coupling projection, and the first outer surface also apply to the second inner contour, the second locking washer, the second end of the coupling projection, and the second outer surface. The second end of the coupling projection can thus interact with the second locking washer or the second inner contour in a particularly space-saving and precise manner. This enables a positive fit between the coupling projection and the fastening device with minimal play. At the same time, the adapted second inner contour results in a particularly compact design for the second locking washer and, consequently, the entire fastening device assembly.

[0065] Preferably, a winding cassette for pre-tensioned winding of a wire with a wire start and a wire end is arranged on the fastening device, wherein the wire start is connected to the winding cassette and the wire end to the coupling projection.

[0066] The wire connects the mounting device to the coupling projection when the housing, including the coupling projection, is detached from the mounting device. If the user releases the housing or the portable object, the wire can prevent or slow down an unintentional fall of the housing.

[0067] After the second switching unit is moved into the release position and the housing assembly, including the coupling projection, is moved away from the mounting device, the wire is unwound from the winding cassette. As the housing assembly approaches the mounting device, the preload causes the wire to automatically wind onto the winding cassette. This preload also prevents the wire from sagging between the housing assembly and the mounting device. In some embodiments, the preload is so high that the winding of the wire onto the winding cassette moves the housing assembly, possibly with a portable object attached to it, towards the mounting device.

[0068] After the first switching unit is moved into the release position and the housing is moved away from the mounting fixture, the coupling device remains attached to the mounting fixture. The housing can then be moved independently of the mounting fixture without the wire connecting the housing to the mounting fixture.

[0069] The wire can be designed as a metallic wire or as a polymer-based thread, e.g. a nylon thread, and can have a length of up to 3m.

[0070] The winding cassette is preferably arranged within the mounting device and is pre-tensioned by a spring. This pre-tension ensures that the wire always tends towards a coiled state. The pre-tension automatically converts the wire from an uncoiled state to a coiled state, during which the wire is subjected to tensile stress. In other words, the wire always rewinds itself.

[0071] The wire can be moved from a coiled to an uncoiled state, for example, by pulling on the wire via the coupling projection. The wire can thus be pulled out of the winding cassette under tension by pulling on the coupling projection, whereby the tension in the wire, generated by the spring, causes the pulled-out wire to return to its coiled state without the application of an external pulling force.

[0072] Pulling on the coupling projection is made possible after the second end of the coupling projection has been released by a second locking washer positioned in the release position. This release can be achieved by rotating the second locking washer, for example, by manually actuating the second switch. The user can then freely access and move the housing assembly independently of the mounting device, while a secure connection between the mounting device and the housing assembly is maintained via the wire.

[0073] During free use of the housing device, the wire does not dangle uncomfortably but is kept under constant tension by the spring attached to the wire, thus increasing user comfort. After using the housing device or a portable object placed within it, the user can return the housing device to the mounting device and, through the interaction of the second locking washer with the second end of the coupling projection, establish a positive connection between the mounting device and the housing device. After the position of the second locking washer changes from the release position to the closed position, the housing device is then held securely in contact with the mounting device.

[0074] By connecting the wire end to the coupling projection, the housing device, which can be connected to the coupling projection, can be additionally secured, for example, against falling or slipping out of the hand. The system according to the invention is thus designed to be particularly user-friendly and safe. It can also be provided that the use of the wire is undesirable and the user wishes to use the housing device freely without the wire. This is made possible by releasing the first end of the coupling projection via the first locking washer in the release position. The coupling projection is then positively connected to the fastening device via the second end and the wire, while the first end of the coupling projection is released, allowing the user maximum flexibility in using the housing device.

[0075] In this embodiment of the system according to the invention, the coupling projection can be arranged on the housing device via the first end, wherein the second end of the coupling projection is connected to the wire end and the second end of the coupling projection is optionally released via the second locking washer or positively connected.

[0076] Additionally, the coupling projection can be positively engaged at its second end on the fastening device, whereby the first end of the coupling projection can be selectively released or positively engaged with the housing device via the first locking washer.

[0077] Naturally, the above-described embodiment of the fastening device with the winding cassette can also be provided in the embodiment of the first system with at least one pair of magnets. In this case, the housing device can be particularly advantageously guided to a suitable position by the magnetic force in addition to the pre-tensioned wire.

[0078] Preferably, the fastening device has a first and a second plate element, wherein the band element can be arranged sandwich-like between the first and the second plate element.

[0079] The two plate elements allow the system according to the invention to be arranged particularly advantageously on the band element across the surface of the plate elements, thereby increasing the stability of the arrangement. The plate elements can preferably be rectangular, with the longer sides of each plate element being arranged approximately parallel to a longitudinal side of the band element. Due to this parallel arrangement with respect to the band element, the system according to the invention is particularly space-saving, thus enabling comfortable wear for the user. Furthermore, the system according to the invention can be moved along the band element as needed.

[0080] The plate elements are designed for force-fit holding, in particular clamping, of the band element.

[0081] The two plate elements allow the system according to the invention to be arranged particularly advantageously over the surface of the plate elements on the band element, thereby increasing the stability of the arrangement.

[0082] Preferably, the first and second plate elements are connected to each other via a hinge and can be detachably locked together via a locking device arranged opposite the hinge.

[0083] The first and second plate elements can thus form a single assembly, resulting in a particularly compact fastening device. This allows the user to easily position and move the fastening device along the band element.

[0084] The first and second plate elements are connected to each other via a hinge around a longitudinal axis along which the hinge extends, with the plate elements being designed to pivot relative to each other. The hinge allows the plate elements – and thus the fastening device – to be positioned on the band element particularly easily, for example, by the user using one hand and by grasping them.

[0085] The locking device arranged opposite the hinge enables the plate elements to be locked to each other, so that the plate elements cannot detach from the hinge element when arranged on the hinge element.

[0086] Preferably, the locking device has a spring-loaded sliding element and at least one hook element, wherein the spring-loaded sliding element and the at least one hook element can be positively connected to each other.

[0087] The locking device can thus be closed particularly easily and securely and, if necessary, reopened by manually moving the sliding element. The at least one hook element is designed to interact with the spring-loaded sliding element in such a way that a positive-locking connection can be established by a translational movement of the sliding element. Due to the spring tension, the sliding element and the hook element form a latching connection, which can be released by actuating it with a translational movement of the sliding element. This actuation of the sliding element can be performed, for example, by the user with their thumb, so that a thumb movement releases the positive-locking connection between the sliding element and the hook element, thus opening the locking device.

[0088] With the locking device open, the two plate elements on the side of the locking device can be moved towards each other until at least one hook element engages with the spring-loaded sliding element, forming a positive-locking connection. Manual movement of the sliding element is not strictly necessary to create this positive lock, as the spring tension allows the sliding element to engage with the hook element in a snap-locking manner. The locking device can therefore be closed particularly easily and securely and, if necessary, reopened by manually moving the sliding element.

[0089] The sliding element can have a slide switch with at least a partially textured surface, making it particularly easy for the user to locate the switch by touch. The slide switch can be positioned on a side wall of the first or second panel element and connected to the sliding element, thus making it particularly easy to operate the sliding element by moving the slide switch along the side wall.

[0090] Preferably, the first plate element and / or the second plate element has at least one clamping device by means of which the fastening device can be arranged forcefully on the band element.

[0091] The clamping device allows the respective plate element or fastening device to be securely attached to the band element in such a way that displacement along the band element is prevented or made more difficult. The clamping device can be designed to be releasable, allowing the user to easily and precisely fix the fastening device to the band element. The at least one clamping device can be designed as a type of pivot lever that can be manually pivoted by the user. Pivoting the lever causes a section of it to clamp against the band element, thus creating the secure connection.

[0092] The invention will be explained in more detail below with reference to the following figures.

[0093] They show:

[0094] Figure 1: a schematic representation of a first embodiment of the system according to the invention;

[0095] Figure 2a: a schematic representation of a first embodiment of the fastening device of the system according to Figure 1;

[0096] Figure 2b: a schematic representation of a second embodiment of the fastening device;

[0097] Figure 3: a schematic representation of a coupling projection of the fastening device according to Figure 2b;

[0098] Figure 4: a schematic representation of an embodiment of the housing device with the cassette device of the system according to Figure 1;

[0099] Figure 5: a schematic representation of a second embodiment of the system according to the invention.

[0100] Figure 1 shows a schematic representation of a first embodiment of the system 1 according to the invention, comprising a mounting device 100, a housing device 200 for a portable object, and a rectangular cassette device 300. The housing device 200 is designed in the manner of a smartphone case and is configured to hold a smartphone. The housing device 200 can be detachably fixed to the mounting device 100. The mounting device 100 is designed for attachment to a strap element (not shown), for example, a backpack strap or the strap of a shoulder bag. A user can attach and detach the smartphone, together with the housing device 200, to the mounting device 100 and, indirectly, to the strap element as desired.

[0101] System 1 also includes a cassette device 300, which can be arranged on the housing device 200. As shown in Fig. 1, the cassette device 300 is designed to be positioned on the side of the housing device 200 facing away from the mounting device 100. The cassette device 300 and the mounting device 100 each have magnets in multiple pairs, which are shown in the following figures. The magnets exert an attractive force on each other, referred to as the holding force. The holding force causes the housing device 200, including the cassette device 300, to be held on the mounting device 100, provided that a sufficiently small distance is maintained between the housing device 200 and the mounting device 100. The housing device 200 can be released from the mounting device 100 by overcoming the holding force.In this way, the user can indirectly attach and detach the smartphone, which is held by the housing device 200, to the strap element. This allows the user free access to the smartphone and the ability to attach it to the strap element as needed.

[0102] The fastening device 100 comprises a first and a second plate element 150, 160, and a coupling projection 110, wherein the coupling projection 100 is integrally connected to the second plate element 160 and thus integrally to the fastening device 100. The coupling projection 110 is hexagonal and can therefore be inserted into a similarly hexagonal housing opening 210 of the housing device 200. When the housing device 200 is in contact with the fastening device 100, for example in a bearing position, the coupling projection 110 extends through the housing opening 210 so that it can be inserted into a cassette opening (not shown) of the cassette device 300.

[0103] The housing device 200 has a housing recess 220 that is adapted to the rectangular shape of the cassette device 300, so that the cassette device 300 can be installed inside the housing device 200. The assembly consisting of the housing device 200 and the cassette device 300 is therefore particularly compact.

[0104] Figure 2a shows a schematic representation of a first embodiment of the fastening device 100 with the first plate element 150, the second plate element 160, and the coupling projection 110. The coupling projection has a first end 111, a first circumferential surface 1111, and a first groove 1112. Based on the exploded view shown, the coupling projection 110 is spaced apart from the second plate element 160 and is depicted as a separate component from the fastening device 100.

[0105] Four second magnets 420 of four magnet pairs 400 are arranged on the fastening device 100, or between the first plate element 150 and the second plate element 160. These second magnets are located approximately congruently and opposite four first magnets 410 of the same magnet pairs 400 on the cassette device (not shown). The first plate element 150 has two clamping devices 190 by means of which the system 1 according to the invention can be force-fitted to the belt element. The clamping elements 190 are each designed as toggles, so that the user can clamp the clamping elements, and thus the fastening device 100, against a belt element or release them again by means of a toggling motion.

[0106] Furthermore, the first and second plate elements 150, 160 are connected to each other via a hinge 170, with a first part of the hinge 170 being arranged on the first plate element 150 and a second part of the hinge 170 on the second plate element 160. Opposite the hinge 170 is a locking device 180 with a spring-loaded sliding element 181 and a hook element 182. The sliding element 181 can also be made up of multiple parts. The hook element 182 is arranged on the first plate element 150 and the spring-loaded sliding element 181 is arranged on the second plate element 160, so that they can interact positively and form a detachable connection. The positive locking mechanism can be achieved by a snap-fit ​​insertion of the spring-loaded sliding element 181 and the hook element 182, whereby the first and the second plate elements 150, 160 are moved towards each other.

[0107] To release the positive locking mechanism, the spring-loaded sliding element 181 is moved via a sliding switch 183 such that the hook element 182 no longer engages positively with the sliding element 181. The first and second plate elements 150, 160, or the fastening device 100, can thereby be opened on the side opposite the hinge 170. Figure 2b shows a schematic representation of a second embodiment of the fastening device 100. The fastening device 100 shown has a winding cassette 140 arranged on the second plate element 160, which is suitable for winding and storing a wire 141. The wire 141 is connected at one end to the winding cassette 140 and at the other end to the coupling projection 110. A coil spring 142 is arranged on the winding cassette 140, which keeps the wire 141 under constant tension.The wire 141 can be connected to the coil spring 142 either directly or via a winding element 143. If the coupling projection 110, which can be connected to the housing device 200 (not shown), is detached from the fastening device 100, the wire 141 is held under increased tensile tension by the spring preload of the coil spring 142, thus advantageously preventing undesired sagging of the wire 141.

[0108] At the same time, the portable object, which may be arranged in the housing device 200, is protected from impact on the ground in the event that the housing device 200 slips out of the hand over the wire 141.

[0109] The release of the coupling projection 110 is achieved via a second switching unit 130. This unit comprises a second locking disc 131 and a second switching device 132, wherein the second switching unit 130 can be alternately adjusted between the closed position and the release position by rotating the second locking disc 131. This adjustment can be made via the second switching device 132, which is integrally connected to the second locking disc 131 and can be actuated externally by the user through a slot on an edge region of the second plate element 160.

[0110] A positive fit between the fastening device 100 and the housing device 200 is generated by the interaction of the coupling projection 110 and the second switching unit 130. For this purpose, the second locking washer 131 has a second recess 1311 and a second inner contour 1312. The second end of the coupling projection 112 is guided through a mounting opening 120 to generate the positive fit, with the second switching unit 130 initially in the release position. The second end 112 of the coupling projection 110 is then guided into the area of ​​the second recess 1311 of the second locking washer 131 until the housing device 200 abuts the fastening device 200. Essentially, the second inner contour 1312 of the second locking washer 131 is adapted to a second circumferential surface 1121 of the second end 112 of the coupling projection 110.In the present case, the second inner contour 1312 and the second lateral surface 1121 are hexagonally designed.

[0111] In the installation position, the second inner contour 1312 is arranged in the same plane as the second groove 1122 of the second end 112 of the coupling projection 110. In this position, the second switching unit 130 can be moved from the release position to the closed position by rotating the second locking disc 131, which can be manually actuated by means of the second switching device 132, so that the second locking disc 130 and the coupling projection 110 are axially locked to each other. The coupling projection 110 is now positively connected to the fastening device 100.

[0112] To simplify the process of attaching the housing device 200 to the mounting device 100 for the user, in the illustrated embodiment four second magnets 420 of four magnet pairs 400 are arranged on the second plate element 160. Corresponding to these four first magnets 410, four second magnets 420 are arranged on the housing device 200 (not shown).

[0113] Furthermore, a hinge 170 is formed between the first and second plate elements 150, 160, with a locking device 180 arranged opposite the hinge. Regarding the features already mentioned, in particular the hinge 170 and the locking device 180, reference is made to the illustrations in Fig. 2a to avoid repetition.

[0114] A separating plate 155 is arranged between the first and second plate elements 150, 160, spatially separating the winding cassette 140 from the first plate element 150. The fastening device 100 can thus be arranged on the belt element without coming into contact with the winding cassette 140.

[0115] Figure 3 shows a schematic representation of the coupling projection 110 according to the second embodiment of the system 1 according to the invention, which is shown in Fig. 2b.

[0116] The coupling projection 110 can be positively connected to the housing device 200 via the first end 111 and to the fastening device 100 via the second end 112. The positive connection is generated on the side of the first end 111 by an interaction of the first inner contour 3212 of the first locking washer 321 (not shown) with the first groove 1112, and on the side of the second end 112 by an interaction of the second inner contour 1312 of the second locking washer 131 (not shown) with the second groove 1122.

[0117] The coupling projection 110 can thus be positively connected to both the fastening device 100 and the housing device 200, whereby the positive connection can be released again via the first or the second locking washer 321, 131. Naturally, a positive connection with both the fastening device 100 and the housing device 200 is also possible simultaneously. In this case, the portable object is firmly fixed to the fastening device 100.

[0118] Figure 4 shows a schematic representation of an embodiment of the housing device 200 with the cassette device 300. The housing device 200 has a shape adapted to the portable object, in this case a smartphone, wherein the side of the housing device 200 facing the mounting device 100 in the installation position has a housing opening 210. The housing opening 210 is adapted to the coupling projection 110 so that the first end of the coupling projection 111 can be inserted into the housing opening 210 with comparatively little play.

[0119] Furthermore, the cassette device 300 is shown in an exploded view, wherein the size of the cassette device 300 is adapted to a housing recess 220 of the housing device 200, so that the cassette device 300 can be mounted flush in the housing recess 220. For this purpose, the cassette device 300 can, for example, be glued into the housing recess 220 or integrated into the housing device 200 during its manufacturing process.

[0120] The cassette device 300 essentially consists of a first and a second side element 330, 340, wherein the first switching unit 320 is arranged sandwich-like between the two side elements 330, 340.

[0121] The first switching unit 320 comprises a first locking washer 321 and a first switching device 322, which is mounted on an edge region of the first locking washer 321. A translational movement of the first switching device 322 along a side surface of the housing device 200 causes a rotation of the first locking washer 321.

[0122] TI locking washer 321. The first switching device 322 has a lever 3221 to simplify the translational movement, which extends through a side surface opening 230 of the aforementioned side surface of the housing device 200. The lever 3221 and the first switching device 322 are formed in one piece.

[0123] The user can thus, from outside the housing device 200, actuate the lever 3221 to effect a translational movement of the first switching device 322, thereby causing a rotational movement of the first locking washer 321 and thus, in turn, an alternating adjustment of the first switching unit 320 between the release position and the closed position, or vice versa. The adjustment relative to the housing device 200 and the mounting device 100 is such that only the first locking washer 321 is rotated, while the housing device 200 and the mounting device 100 remain stationary.

[0124] The switching device 322 enables the rotation of the first locking washer 321, which in turn has a first recess 3211 and a first inner contour 3212. During rotation, the first locking washer 321 is guided along a guide structure 341, which is part of the second side element 340. The second side element 340 also has a centrally arranged side element opening 342, which is aligned with the housing opening 210. If the first locking washer 321 is in the release position, the first recess 3211 of the first locking washer 321 is also aligned with the side element opening 342 and the housing opening 210, so that the first end 111 of the coupling projection 110 can be guided unhindered through the housing opening 210, the side element opening 342 and the first recess 3211 of the first locking washer 321 in a contact position.

[0125] After the first end 111 of the coupling projection 110 has been inserted, the first locking washer 321 can be rotated from a release position to a closed position, so that the first locking washer 321 locks the first end 111 of the coupling projection 110 and a frictional connection is created. The coupling projection 110 is now positively connected to the cassette device 300 or the housing device 200.

[0126] To ensure that the first locking washer 321 remains in the closed or released position with relatively little play, several detent sections 3213 are arranged on the first locking washer 321. These detent sections can interact with notches 3411 in the guide structure 341 that are adapted to the detent sections 3213. Each detent section 3213 can form a snap-fit ​​connection with a notch 3411.

[0127] Furthermore, the first side element 340 has four through-holes 343, each through-hole 343 being adapted to a first magnet 410 of a magnet pair 400. Accordingly, four first magnets 410 can be integrated into the first side element 340, so that these can advantageously interact with four second magnets 420, which are arranged on the mounting device 100 (not shown). The four magnet pairs 400 have sufficient holding force so that the housing device 200 can be arranged in the mounting position on the mounting device even without a positive-locking connection.

[0128] Figure 5 shows a schematic representation of the second embodiment of the system 1 according to the invention, comprising the essential components of the fastening device 100, the housing device 200, the cassette device 300, and the four pairs of magnets 400. Regarding the features already mentioned, reference is made to the descriptions of the preceding figures to avoid repetition. Figure 5 shows in particular the arrangement of the first and second magnets 410 and 420, according to which the first magnets 410 are arranged on the cassette device 300 at approximately the same distances from each other as the second magnets 420 are arranged on the fastening device 100. The magnets 410 are distributed evenly around the coupling projection 110 on the one hand and the cassette opening 310 on the other. This ensures that the holding force acts perpendicular to the surfaces where the housing device 200 and the fastening device 100 abut each other.

[0129] Furthermore, it becomes apparent how the first end 111 of the coupling projection 110 is guided first through the housing opening 210 and then into the cassette opening 310 and the first recess 3211 of the first locking washer 321 to generate the positive locking connection. In the illustrated view, the first inner contour 3212 of the first locking washer 321 is visible, so that the first switching unit 320 is arranged in a closed position.

[0130] The system 1 according to the invention provides a detachable holder for a portable object, wherein the housing device 200 can be detachably held on the fastening device 100 via the magnet pairs 400 and / or via the positive locking through the coupling projection 110. Reference numeral list

[0131] 1 system

[0132] 100 fastening device

[0133] 110 Clutch lead

[0134] 111 First end of the coupling projection 1111 First lateral surface

[0135] 1112 First Nut

[0136] 112 Second end of the coupling projection 1121 Second cylindrical surface

[0137] 1122 Second groove

[0138] 120 Mounting opening

[0139] 130 Second switching unit

[0140] 131 Second locking washer

[0141] 1311 Second recess

[0142] 1312 Second inner contour

[0143] 132 Second switchgear

[0144] 140 roll-up cassette

[0145] 141 wire

[0146] 142 spiral spring

[0147] 143 Roll-up element

[0148] 150 First plate element

[0149] 155 Partition plate

[0150] 160 Second plate element

[0151] 170 hinge

[0152] 180 locking device

[0153] 181 Spring-loaded sliding element 182 Hook element

[0154] 183 slide switches

[0155] 190 clamping device

[0156] 200 Housing device

[0157] 210 Case opening

[0158] 220 Case recess

[0159] 230 side surface opening

[0160] 300 cassette device

[0161]

[0162] 310 Cassette opening

[0163] 320 First switching unit 321 First locking washer 3211 First recess 3212 First inner contour 3213 Detent section

[0164] 322 First switching device 3221 Lever

[0165] 330 First side element 340 Second side element 341 Guide structure 3411 Notch

[0166] 342 Side element opening 343 Through hole 400 Magnet pair

[0167] 410 First Magnet

[0168] 420 Second Magnet

[0169]

Claims

Patent claims 1. System (1) for a detachable holder for a portable object with - a fastening device (100) for arranging the system (1) on a belt element; - a housing device (200) for enclosing the portable object; - a cassette device (300) arranged on the housing device (200); - at least one pair of magnets (400), wherein a first magnet (410) of the magnet pair (400) is arranged on the cassette device (300) and a second magnet (420) of the magnet pair (400) is arranged on the fastening device (100). and wherein, in a position adjacent to the housing device (200) on the fastening device (100), an adhesive force of the first magnet (410) of the magnet pair (400) against the second magnet (420) of the magnet pair (400) holds the fastening device (100) and the housing device (200) in a fixed position opposite each other.

2. System according to claim 1, characterized in that a coupling projection (110) with a first end (111) is arranged on the fastening device (100) and the cassette device (300) has a cassette opening (310), wherein the first end (111) of the coupling projection (110) can be inserted into the cassette opening (310) and wherein the cassette device (300) can be positively connected to the first end (111) of the coupling projection (110) inserted into the cassette opening (310).

3. System according to claim 2, characterized in that the cassette device (300) has a first switching unit (320) adjustable between a release position and a closed position, which is movable relative to the housing device (200) and the fastening device (100) for adjustment between the release position and the closed position, wherein the first switching unit (320) in the closed position can be positively connected to the first end (111) of the coupling projection (110) inserted into the cassette opening (310) and releases the first end (111) of the coupling projection (110) in the release position.

4. System (1) for a detachable holder for a portable object with - a fastening device (100) for arranging the system (1) on a belt element; - a housing device (200) for enclosing the portable object; - a cassette device (300) arranged on the housing device (200), wherein a coupling projection (110) with a first end (111) is arranged on the fastening device (100) and the cassette device (300) has a cassette opening (310), wherein the first end (111) of the coupling projection (110) can be inserted into the cassette opening (310), wherein the cassette device (300) has a first switching unit (320) adjustable between a release position and a closed position, which is movable relative to the housing device (200) and the fastening device (100) for adjustment between the release position and the closed position, and wherein the first switching unit (320) in the closed position can be positively connected to the first end (111) of the coupling projection (110) inserted into the cassette opening (310) and in a position adjacent to the housing device (200) on the fastening device (100) holds the housing device (200) in contact with the fastening device (100) and in the release position releases the first end (111) of the coupling projection (110).

5. System according to one of claims 3 or 4, characterized in that the first switching unit (320) has a first locking washer (321) with a first recess (3211) which defines a first inner contour (3212), wherein the first end (111) of the coupling projection (110) has a first cylindrical surface (1111) and a first groove (1112) extending along the first cylindrical surface (1111), wherein in the closed position the first inner contour (3212) interacts with the first groove (1112) and positively connects the first end (111) of the coupling projection (110) with the first locking washer (321) of the cassette device (300).

6. System according to claim 5, characterized in that the first switching unit (320) is adjustable between the closed position and the release position by a rotation of the first locking disc (321).

7. System according to claim 5 or 6, characterized in that the first inner contour (3212) of the first locking washer (321) is adapted to the first lateral surface (1111) of the first end (111) of the coupling projection (110).

8. System according to one of claims 6 or 7, characterized in that the first switching unit (320) has a first switching device (322), wherein a translational movement of the first switching device (322) along a side surface of the housing device (200) causes a rotation of the first locking disc (321).

9. System according to one of claims 5 to 8, characterized in that the first locking disc (321) has at least one detent section (3213) which holds the first locking disc (321) detent in the release position or in the closed position.

10. System according to one of claims 5 to 9, characterized in that the cassette device (300) has a first and a second side element (330, 340), wherein the first and / or the second side element has a guide structure (341) for the rotation of the first locking disc (321) and / or the translational or parallel movement of the first switch device (322), and wherein the first locking disc (321) and / or the first switch device (322) are arranged sandwich-like between the first and the second side element (330, 340).

11. System according to claim 10, characterized in that the first magnet (410) of the at least one pair of magnets (400) is arranged on the side element (330, 340) of the cassette device (300) which faces the fastening device (100).

12. System according to one of claims 2 to 11, characterized in that the coupling projection (110) has a second end (112) opposite the first end (111), wherein the second end (112) of the coupling projection (110) can be connected to the fastening device (110) in a positive-locking or force-locking manner.

13. System according to claim 12, characterized in that the fastening device (100) has a fastening opening (120), wherein the second end (112) of the coupling projection (110) can be inserted into the mounting opening (120), wherein the fastening device (100) has a second switching unit (130) adjustable between a release position and a closed position, and wherein the second switching unit (130) can be connected in the closed position to the second end (112) of the coupling projection (110) inserted into the mounting opening (120) and releases the second end (112) of the coupling projection (110) in the release position.

14. System according to claim 13, characterized in that the second switching unit (130) has a second locking washer (131) with a second recess (1311) which defines a second inner contour (1312), wherein the second end (122) of the coupling projection (110) has a second cylindrical surface (1121) and a second groove (1122) extending along the second cylindrical surface (1121), and wherein in the closed position the second inner contour (1312) interacts with the second groove (1122) and the second end (112) of the coupling projection (110) can be positively connected to the second locking washer (131) of the second switching unit (130).

15. System according to claim 14, characterized in that the second switching unit (130) is adjustable between the closed position and the release position by a rotation of the second locking disc (131).

16. System according to one of claims 14 or 15, characterized in that the second inner contour (1312) of the second locking washer (131) is adapted to the second lateral surface (1121) of the second end (112) of the coupling projection (110).

17. System according to one of claims 2 to 16, characterized in that a winding cassette (140) for pre-tensioned winding of a wire (141) with a wire start and a wire end is arranged on the fastening device (100), wherein the wire start is connected to the winding cassette (140) and the wire end to the coupling projection (110).

18. System according to one of claims 1 to 17, characterized in that the fastening device (100) has a first and a second plate element (150, 160), wherein the band element can be arranged sandwich-like between the first and the second plate element (150, 160).

19. System according to claim 18, characterized in that the first and the second plate element (150, 160) are connected to each other via a hinge (170) and can be detachably locked to each other via a locking device (180) arranged opposite the hinge (170).

20. System according to claim 19, characterized in that the locking device (180) has a spring-loaded sliding element (181) and at least one hook element (182), wherein the spring-loaded sliding element (181) and the at least one hook element (182) are positively interlockable.

21. System according to one of claims 18 to 20, characterized in that the first plate element (150) and / or the second plate element (160) has at least one have or have a clamping device (190) by means of which the fastening device (100) can be arranged forcefully on the band element.

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