Locking device for detachably connecting two parts

Description

[0001] The invention relates to a closure device for releasably connecting two parts to one another.

[0002] Such a closure device comprises a first closure part, which has a first base body, and a second closure part, which has a second base body. The first closure part and the second closure part can be attached to one another in such a way that, in a closed position, the first base body and the second base body are at least partially connected to one another in an at least form-fitting manner to support a load acting between the first closure part and the second closure part along a loading direction. Holding the first and second closure parts together in the closed position is magnetically assisted in order to facilitate assuming the closed position and to specify a proper alignment of the first and second closure parts to one another in the closed position.The attachment of the closure parts to each other can also be magnetically supported, namely by a magnetically attractive effect of magnets of the first and second closure parts.

[0003] Such a closure device can be used, for example, on items of clothing, such as a shoe, a shirt, a jacket, or the like. However, such a closure device can also be used, for example, on a bag or other accessory, as well as on a medical device, such as an orthosis or a prosthesis.

[0004] It is fundamentally desirable to be able to attach such a closure device variably without, for example, significantly negatively impacting the wearing comfort or handling for the user. In particular, such a closure device should be easy to close and reopen, and should be able to absorb all loads in the closed position, both along a shear direction and along the loading direction, so that the parts connected to each other via the closure direction do not easily separate from each other due to the load.

[0005] Comparable closure devices are described in US 2007 / 107169 A1, which discloses features of the preamble of claim 1, and US 5,253,394 A.

[0006] The object of the proposed solution is to provide a closure device for detachably connecting two parts, which can be used variably, in particular for example on items of clothing, and is easy to handle for a user, i.e., in particular, can be easily opened and closed.

[0007] This object is achieved in particular by a closure device of claim 1.

[0008] Here, a closure device is proposed in which a first base body of the first closure part is provided with an engagement opening and a second base body of the second closure part has at least one engagement portion formed on the second base body. In the closed position, the engagement portion of the second base body is at least partially received in the engagement opening of the first base body to support the load acting along the load direction. The engagement opening is formed on the first base body as a through-opening into which the engagement portion projects in the closed position. By forming the engagement opening for the engagement portion as a through-opening, any ferromagnetic dirt that has settled in the engagement opening, for example, can be removed more easily.Furthermore, the second closure part, which has the engagement section, can easily be dimensioned to protrude, allowing for additional "play" when loads occur. The engagement section can thus extend further into the engagement opening, further reinforcing the positive and, if necessary, force-fitting engagement of the two closure parts. Furthermore, the design as a through-opening allows for a relatively variable engagement depth of the engagement section without negatively affecting the secure, particularly positive, holding of the first and second base bodies against each other. The closure device can thus also be easily used on parts of different thicknesses.

[0009] In one embodiment, the engagement portion of the second closure part extends through the engagement opening in the closed position. The engagement portion thus protrudes through the engagement opening; if appropriate, the engagement portion may even protrude at least slightly on one side of the engagement opening with an end extending through the engagement opening.

[0010] For example, the engagement section is configured to protrude from the second base body in a web-like manner, in particular protruding transversely to the loading direction. Alternatively or additionally, two sections formed on the first base body can be spaced apart from one another along the loading direction and form the engagement opening configured as a through-opening between them. In this case, for example, the engagement of the engagement section in the engagement opening defined as the intermediate space between two adjacent sections on the first base body creates support counter to the loading direction, which holds the closure parts together in the closed position.

[0011] Supported by the magnetic attraction of the closure parts, the engagement section is held between the adjacent sections of the first base body, wherein a (adhesive) friction can exist between the sections defining the engagement opening and the engagement section, which ensures that the closure parts are held together even under comparatively large loads and, if necessary, a deformation of the base bodies due to the load.

[0012] A web-like protruding engagement section can, for example, have a basic shape in cross section that corresponds to the shape of a non-rectangular parallelogram.

[0013] The engagement portion can furthermore have an undercut region against which, in the closed position and when the second closure part is subjected to a load in the loading direction, a portion of the first closure part bordering the engagement opening rests and which at least partially overlaps the portion bordering the engagement opening. Thus, an undercut is formed on the engagement portion, which holds the base bodies together in the closed position, counter to the closing direction.

[0014] In principle, the engagement section, in particular a web-like or pin-shaped engagement section, can extend in a straight line transverse to the direction of load. However, it is also conceivable and possible for the engagement section to extend in a curved or inclined manner on the second base body.

[0015] According to the invention, the engagement portion has a contact surface which, in the closed position, bears against a portion of the first closure part bordering the through-opening to support a load acting on the second closure part in the direction of loading. Such a contact surface creates (adhesive) friction between the engagement portion of the second closure part, which reliably holds the first and second closure parts together even under load, so that the closure parts cannot easily be separated from one another due to the load.

[0016] The contact surface is inclined to the loading direction and to a closing direction, along which the first closure part and the second closure part can be attached to one another, in such a way that when the second closure part is loaded in the loading direction, the engagement section is loaded with a force component in the closing direction relative to the first closure part. The engagement of the engagement section in the engagement opening is thus self-reinforcing under load. Due to the inclination of the contact surface, when the load is applied in the loading direction, a force component (obtained by vector decomposition) acts in the closing direction and thus in the direction of engagement of the engagement section of the second closure part in the engagement opening on the base body of the first closure part.

[0017] A section of the first closure part bordering the engagement opening can, for example, have a contact surface which is designed to be complementary to the contact surface of the engagement section of the second closure part, so that in the closed position there is a flat contact between the mutually associated contact surfaces.

[0018] Holding the first and second closure parts together in the closed position can generally be magnetically assisted by at least one magnet in the first or second closure part. For this purpose, for example, a (permanent) magnet can be incorporated on the first or second closure part.

[0019] In one embodiment, at least one magnet of the first closure part and / or at least one magnet of the second closure part is magnetized along a magnetization direction collinear with the direction of load. The north pole and south pole of the magnets are thus offset from one another along the direction of load. In particular, if the magnets are provided directly on the engagement section and a section bordering the engagement opening, this results in a magnetic attraction in the closed position between the at least one section of the first closure part bordering the engagement opening and the engagement section of the second closure part along a direction collinear with the direction of load. In this way, for example, an advantageous (adhesive) friction can be established between the sections of the two base bodies.

[0020] In one embodiment of a proposed closure device, it is provided that a predefined free space is formed between the first base body and the second base body in the closed position. This predefined free space can be formed in particular in the vicinity of the engagement portion, so that regions of the second base body of the second closure part adjacent to the protruding engagement portion are spaced apart from the first base body of the first adjustment part having the engagement opening. This provides, for example, an additional immersion reserve and thus the possibility for the engagement portion to immerse further into the continuous engagement opening if necessary - at least partially bridging the predefined free space - for example, in the event of a greater load on the closure device.

[0021] Furthermore, depending on the application of the closure device, the predefined free space can be used to allow areas of the second base body to be covered by the part on which the second closure part is provided. For example, a fabric of a garment on which the closure device is provided can then protrude into the provided free space.

[0022] One of the first or second base bodies of the first and second closure part can be annular or annular disc-shaped.

[0023] The use of an annular or annular disc-shaped base body, in particular a circular or annular disc-shaped base body, can enable a compact and cost-effective design of the closure device.

[0024] In one embodiment, the annular or annular-disk-shaped first or second base body is formed with a through-opening provided substantially centrally on the base body. For the positive connection of the first and second closure parts, the engagement portion of one closure part engages in this centrally provided through-opening of the other closure part in the closed position. The annular or annular-disk-shaped base body can thus be attached, for example, to a web-like or pin-like protruding engagement portion.

[0025] Regardless of the intended use of the through-opening provided on the annular or annular disc-shaped base body, a further development can provide that the annular or annular disc-shaped base body, in addition to the essentially centrally provided through-opening, comprises at least one further through-opening for a flexible tensioning element which, in the closed position, transmits the load acting along the loading direction to the closure parts. A tensioning element of the closure device, e.g. in the form of a shoelace, a cord, a rope, a string or a band, is thus held at an additionally provided opening in the annular or annular disc-shaped base body. Such an additional through-opening can, for example, be channel-like or in the form of an eyelet on the respective base body.The annular or annular disc-shaped base body thus forms at least one opening through which a flexible clamping element is held on the base body.

[0026] According to a further aspect, a closure device can be provided which is particularly suitable for detachably connecting two parts of a garment and in which at least one of the first and second base bodies has at least one through-opening through which a flexible tensioning element is guided. This tensioning element transmits the load acting along the loading direction to the closure parts in the closed position. The tensioning element is then held at the through-opening on the first or second base body having the through-opening.

[0027] The at least one through opening can, for example, be provided at a distance from an engagement opening which is also formed on the first or second base body having the through opening and into which an engagement section of the other, second or first base body engages in the closed position.

[0028] The through opening can, for example, extend in the manner of a channel in the first or second base body or be formed in the form of an eyelet on the first or second base body.

[0029] In the case of a channel-like, continuous opening, this extends, for example, substantially perpendicular to a closing direction of the closure device, along which the first and second closure parts can be attached to one another, as well as substantially perpendicular to a displacement direction along which the closure parts can be displaced relative to one another via engagement with a handle element of the closure device in order to release the first and second closure parts from one another. In the case of a (circular) ring-shaped or (circular) disk-shaped base body, a channel-like opening can, for example, run substantially along a secant of a circular shape enclosing the contour of the base body.

[0030] In an alternative embodiment, the through-opening through which the flexible clamping element is guided and held on the first or second base body is formed centrally on the first or second base body. A central opening of a base body, for example, an annular or annular disc-shaped, then serves to hold the flexible clamping element. Additionally, a possible grip element can also extend through the central opening with a portion and be held on the respective base body by this portion.

[0031] For the positive connection of the first and second closure parts in the closed position, in a configuration explained above, in which the clamping element is held at a centrally provided opening, an element of the second or first closure part can at least partially overlap a section bordering the opening on the base body of the other first or second closure part having the opening. A corresponding overlapping element can here - via a corresponding undercut area - primarily absorb shear forces and, if applicable, any tilting forces when the closure device is closed.

[0032] In principle, a corresponding overlapping element of one base body can be arranged laterally offset from an area where an opening for a clamping element is provided on the other base body, relative to the closed position. Any load introduced into the respective base body via the clamping element is thus laterally supported by the overlapping element of the other base body. In particular, any tilting forces and shear forces on the outer circumference of a base body can be easily absorbed in this way.

[0033] Regardless of the design of the closure device according to one of the different aspects explained above, which can basically also be combined with one another, a handle element can be provided on the first or second base body for manually releasing the closure parts from one another. For example, such a handle element is flexible. In particular, the handle element can be designed with a textile, leather, rubber or plastic band, a cord or a rope. The textile, leather, rubber or plastic band can, for example, have a tab-like section that can be grasped manually by a user when the closure device is to be closed or opened. A cord or a rope can, for example, form a loop for this purpose.

[0034] In one embodiment, the grip element is held at a through opening in the first or second base body, in particular, it is movably mounted thereon. Such a through opening can, in particular, be a through central opening, to which at least one clamping element is also held. Alternatively, the through opening is an opening in the respective first or second base body, which is provided in addition to a centrally or decentrally formed engagement opening.

[0035] In principle, the first base body and / or the second base body can be made, at least in sections, from a flexible material. Because the first base body and / or the second base body are made, at least in sections, from a flexible material, the first base body and / or the second base body can each be variably arranged on an associated part, optionally with variable adaptation to the shape of the part.

[0036] In this context, a flexible material is understood to mean a material that provides elastic, flexible deformability to the first base body and / or the second base body, so that the first base body and / or the second base body - at least in those sections that are made of the flexible material - can be flexibly adapted in their shape.

[0037] The use of a flexible material also affects the way the closure parts hold together. For example, the use of a flexible material can provide beneficial (adhesive) friction between the sections of the closure parts in the closed position, ensuring that the closure parts hold together firmly.

[0038] The use of a flexible material can also make the closure device quiet to open and close.

[0039] For example, the two sections of the first base body that define an engagement opening between them and / or the engagement section of the second base body are made of the flexible material.

[0040] The flexible material can be, for example, a thermoplastic elastomer, in particular a thermoplastic polyurethane (TPU for short), or a synthetic rubber material, in particular acrylonitrile butadiene rubber (NBR for short).

[0041] The flexible material may comprise a fiber content, for example a content of glass fibers, advantageously with a content of less than 15 percent by weight (% by weight, based on the total weight of the material).

[0042] The advantages and advantageous embodiments as described above also apply analogously to the closure devices according to the other aspects, so that reference is made in full to what has been stated above.

[0043] Closure devices of the type described above can be used in particular on a piece of clothing, for example, a shoe, a jacket, a shirt, or the like. Accordingly, for example, a shoe fastener can be formed with a proposed closure device. Furthermore, it is also conceivable to use a closure device of the type described on a prosthesis, an orthosis, or another medical device. However, this is not to be understood as limiting. A closure device of the type described can, in principle, be used to connect any number of parts to one another.

[0044] The idea underlying the invention will be explained in more detail below with reference to the exemplary embodiment shown in the figures and the examples shown in the figures.

[0045] Here we show: Figures 1A-1E show various views of a first embodiment of a proposed closure device, in which an engagement opening of a first closure part, designed as a through-opening and on which eyelets for flexible tensioning elements are provided, is penetrated in the closed position by a web-like engagement section of a second closure part; Figures 2A-2C show various views of an example of a closure device not according to the invention with a circular disk-shaped first base body of a first closure part, in the engagement opening of which, designed as a through-opening, a rotationally symmetrical engagement section with a mushroom-head-shaped end section of a second base body of a second closure part engages in a locking manner in the closed position, and on which a channel-like through-opening is formed for connecting a tensioning element to the first base body;Figures 3A-3B in different views a further example of a closure device with a circular disc-shaped first base body of a first closure part analogous to the example of; Figures 2A to 2C , but with a differently designed connection to several flexible clamping elements; Figures 4A-4F, in different views, a further example of a closure device with a circular disc-shaped first base body of a first closure part, in which a clamping element and a gripping element are held at a central through-opening and which is held in a form-fitting manner on the second base body of the second closure part by web-like projecting (latching) sections with an undercut area in the closed position.

[0046] The attached Figures 1A-1E , 2A-2C , 3A-3B and 4A-4Fillustrate by way of example an embodiment variant and examples of a closure device V, in which two closure parts 1 and 2 have first and second base bodies 10, 20, via which the two closure parts 1 and 2 are positively connected to one another for at least partially supporting a load Fa, Fb acting along a load direction and an attachment of the two closure parts 1 and 2 to one another and a holding of the closure parts 1 and 2 to one another in a closed position is magnetically supported.

[0047] In the illustrated embodiment and the examples shown, a plurality of (permanent) magnets 101a, 101b, 201, 201a, 201b are provided for the magnetic attraction of the first and second closure parts 1 and 2, which are arranged, for example, in receiving openings 10a, 10b of a base body 10 designed for this purpose. Alternatively, at least one corresponding (permanent) magnet can be embedded in the material from which the respective base body 10 or 11 is made. Likewise, it can be provided that at least one base body 10 or 20 is made at least partially from a ferromagnetic or magnetized material or consists of a magnet.

[0048] The design variant and examples of Figures 1A to 4FEach shows a fastening device V that can be used for fastening a garment. In particular, the illustrated embodiment and the examples can be used as part of a shoe fastening, so that at least one tensioning element 3, 3a, 3b engaging a first base body 10 of a first fastening part 1 can be a shoelace, while the second fastening part 2, with its base body 20, is provided on a shaft of the shoe, for example, in the region of a tongue of the shoe.

[0049] In the version of the Figures 1A to 1E A continuous engagement opening 12 is formed between engagement sections 11a, 11b spaced apart from one another (along a loading direction) on the first base body 10 of the first closure part 1. In this engagement opening 12, a Figures 1B , 1D and 1EIn the closed position shown, an engagement section 21 protrudes like a web on a second base body 20 of the second closure part 2.

[0050] As can be seen particularly from the exploded view of the Figure 1E and the sectional view of the Figure 1E As is clear, permanent magnets 101a, 101b, and 201 are arranged both in the engagement sections 11a, 11b of the first base body 10 and in the web-like protruding engagement section 21 of the second base body 20. The (first) permanent magnets 101a and 101b on the first base body 10 have a first magnetization direction M1 (cf. Figure 1E) pointing from a north pole N to a south pole S of the respective first permanent magnet 101a, 101b. Accordingly, the engagement portion 21 of the second base body 20 comprises a second permanent magnet 201 with a second magnetization direction M2 pointing from a north pole N to a south pole S of the second permanent magnet 201. In the closure device V shown, the permanent magnets 101a, 101b and 201 are arranged in recesses or receiving openings provided for this purpose in the engagement portions 11a, 11b and 21.

[0051] To close the closure device V, the first closure part 1 and the second closure part 2 can be placed against one another along a closing direction Z such that the closure device V assumes the closed position. In the closed position, the base bodies 10 and 20 of the first and second closure parts 1 and 2 extend substantially parallel to one another and perpendicular to the closing direction Z.

[0052] In the closed position, an attractive magnetic force acts between the engagement section 21 of the second closure part 2 on the one hand and each of the two engagement sections 11a, 11b of the first closure part 1 forming the engagement opening 12 on the other hand, corresponding to the mutually facing orientation of the north and south poles N, S, which is directed substantially perpendicular to the closing direction Z. The attractive magnetic forces directed perpendicular to the closing direction Z hold the closure device V securely in its closed position.

[0053] To generate the attractive magnetic forces in the closed position, the permanent magnets 101a, 101b and 201 are arranged in the respective engagement sections 11a, 11b and 21 such that the first magnetization direction M1 and the second magnetization direction M2 run parallel to one another and are directed substantially perpendicular to the closed position Z. The magnetization directions M1 and M2 as well as the attractive magnetic forces thus run substantially parallel to the base bodies 10 and 20 in the closed position. In this way, a particularly simple closing process is enabled, since a user only needs to place the closure parts 1, 2 against one another approximately along the closing direction Z.

[0054] The first magnetization direction M1 of the permanent magnets 101a, 101b arranged in the engagement sections 11a, 11b of the first closure part 1 and the second magnetization direction M2 of the second permanent magnet 201 arranged in the engagement section 21 of the second closure part 2 run parallel to one another in the closed position and are directed substantially perpendicular to the closing direction Z. With respect to the first magnetization direction M1 and the second magnetization direction M2, the engagement sections 11a, 11b, and 21 are arranged one behind the other. The attractive magnetic forces, which are accordingly directed perpendicular to the closing direction Z, hold the closure device V in its closed position even when the closure parts 1, 2 are subjected to a shearing force, provided the shearing force does not exceed the magnetic forces. Inadvertent opening of the closure device V can be prevented in this way.

[0055] The engagement section 21 of the second closure part 2 has the basic shape of a parallelogram with a non-rectangular cross-section, so that a contact surface 21a of the engagement section 21 of the second closure part 2 is inclined both to the closing direction Z and to a loading direction, which is introduced into the closure device V via laces 3a, 3b engaging the first closure part 1. Accordingly, the engagement section 21 of the second closure part 2 extends inclined to the closing direction Z and, in the closed position, is brought into self-reinforcing contact with an associated engagement section 11a of the first closure part 1, which borders the engagement opening 12. Due to the inclination of the contact surface 21a, it is particularly ensured that, when loaded in the loading direction, according to the Figure 1Brepresented forces Fa, Fb on the second closure part 2 - by force deflection - a force component acts on the engagement section 21 of the second closure part 2 in the direction of engagement with the engagement opening 12 between the engagement sections 11a, 11b of the first closure part 1, so that the engagement is additionally secured under load.

[0056] The base body 10 of the first closure part 1 of the variant of the Figures 1A to 1Ehas two fastening eyelets 13a and 13b at one end located in the magnetization direction M1 or M2. These fastening eyelets 13a and 13b are formed on the first base body 10 of the first closure part 1. A section of the laces 3a, 3b is passed through the fastening eyelets 13a and 13b and is held to the first closure part 1 by them. On the base body 10 having the engagement opening 12 with the engagement sections 11a and 11b carrying the permanent magnets 101a, 101b, fastening eyelets 13a and 13b for the laces 3a and 3b are thus formed, so that pulling on the first closure part 1 tensions the laces 3a, 3b and the first closure part 1 can be attached to the second closure part 2 with magnetic support while maintaining the tension of the laces 3a, 3b.

[0057] To facilitate gripping the first closure part 1 when opening and closing the closure device V, a grip or handle element 4 is provided on the first closure part 1. This handle element 4 is formed, for example, by a textile, leather, rubber, or plastic band and is held at a front end of the first closure part 1 on a bearing eyelet 14 of the first base body 10. A section of the handle element 4 thus wraps around a transverse web on the first base body 10 bordering the bearing eyelet 4.

[0058] A user of the closure device 4 can grasp a tab-like protruding section of the grip element 4 and, for example, lift the first closure part 1 from the closed position off the second closure part 2 by pulling along a displacement direction R that runs opposite to the direction of load applied by the taut laces 3a and 3b. Thus, by pulling the grip element 4 along the displacement direction R, the first base body 10 of the first closure part 1 can be displaced relative to the second closure part 2, and in particular its engagement section 21, to such an extent that the engagement section 21 with its contact surface 21a no longer bears positively and force-fittingly against the engagement section 11a of the first closure part 1, and thus the first closure part 1 can be lifted off the second closure part 2 and thus released.

[0059] As can be seen in particular from the sectional view along the section line AA of the Figure 1C in the Figure 1DAs shown, in the closed position, a free space 5 is present between the first and second closure parts 1 and 2. Between an upper side of the second base body 20, from which the engagement section 21 protrudes, and an underside of the first base body 10 of the first closure part 1 with the engagement opening 12, a gap-shaped free space 5 is thus present on both sides of the web-like protruding engagement section 21. This free space 5 can serve as an additional immersion reserve in order to displace the first closure part 1 further in the closing direction Z along the engagement section 21 of the second closure part 2 under greater load, for example. Furthermore, the free space 5 can simplify the connection of the second base body 20 of the second closure part 2 to shoe materials, and in particular shoe fabrics of different thicknesses.For this purpose, a gap height of the free space 5 is dimensioned such that materials of different thicknesses can be arranged in one section in the free space 5.

[0060] For example, in the version of the Figures 1A to 1E The first and second base bodies 10 and 20 can be at least partially flexible, although this is of course not mandatory. In the second base body 20 of the second closure part 2, for example, a flatly extending base, from which the engagement portion 20 protrudes in a web-like manner, can be flexible, while the engagement portion 21 itself is rigid.

[0061] In the non-inventive example of Figures 2A to 2CThe second closure part 2 is formed with a disc-shaped second base body 20, on which a pin-shaped protruding engagement section 21 with a mushroom head 210 is formed as an undercut area. In the closed position, the engagement section 21 with the mushroom head 210 passes through a centrally arranged engagement opening 12 in a circular disc-shaped first base body 10 of a first closure part 1 of the example of Figures 2A to 2C . The rotationally symmetrical design of the engagement section 21 with the rotationally symmetrical mushroom head 210 in the closure device V of the Figures 2A to 2C The two locking parts 1 and 2 can be locked in place independently of each other's direction.

[0062] When a load is applied via a shoelace 3 connected to the first closure part 1, it is ensured that the first closure part 1 cannot be easily separated from the second closure part 2 and in particular from the mushroom head 210, in that the mushroom head 210 at least partially engages over an (inner) edge of a section of the first base body 10 bordering the engagement opening 12. Thus, due to the load applied to the first closure part 1 via a shoelace 3, the first closure part 1 is displaced transversely to a longitudinal axis of the peg-shaped, protruding engagement section 21 with the mushroom head 210, so that a projecting edge of the mushroom head 210 at least partially engages over the inner edge of the engagement opening 12 of the first base body 10.The first base body 10 can therefore only be lifted off the second base body 20 of the second closure part 2 and in particular the pin-shaped engagement section 21 after the first base body 10 has been pulled along the displacement direction R opposite to the loading direction and a central axis of the engagement opening 12 and a longitudinal axis of the pin-shaped projecting engagement section 21 with the mushroom head 210 are again coaxial with one another.

[0063] For easier handling and especially the relocation of the first closure part 1, in the example of the Figures 2A to 2CA loop-shaped, flexible grip element 4 is held on the first base body 10. A section of a cord, a rope, or a string of the grip element 4 is guided through a through-opening 14 on the first base body 10. This through-opening 14 traverses the circular-ring-shaped first base body 10 of the first closure part 1 essentially parallel to a disc plane and thus, for example, along a secant of a circle enclosing the contour of the first base body 10.

[0064] Analogously, a fastening opening in the form of a fastening channel 13 is provided which passes through the first base body 10 and through which a section of the shoelace 3 extends.

[0065] In order to attach the two closure parts 1 and 2 also in the example of Figures 2A to 2CTo magnetically support the locking action, permanent magnets 101a, 101b or 201a, 201b are provided on both closure parts 1 and 2. These permanent magnets 101a, 101b, 201a, 201b are arranged on the first base body 10 in receiving openings 10a, 10b, radially spaced from the central engagement opening 12, and on the second base body radially spaced from the central, pin-shaped, protruding engagement portion 21 having the mushroom head 210.

[0066] The arrangement of these permanent magnets 101a, 101b, 201a, 201b is selected, for example, such that, in the closed position and without loading of the first closure part by tightening the shoelace 3, an undercut area provided by the radially projecting edge of the mushroom head 210 does not engage with the first base body 10 of the first closure part. Only when loading occurs and after a concomitant relative movement of the first and second base bodies to one another does the mushroom head 210 positively engage the first base body 10 of the first closure part 1 at the inner edge of the engagement opening 12.

[0067] Alternatively, the permanent magnets 101a, 101b, 201a, 201b can be arranged such that the undercut provided by the mushroom head 210 is engaged even in an unloaded state of the closure device V. With appropriate arrangement, the magnets 101a, 101b, 202a, 202b ensure, for example, that the two base bodies 10 and 20 of the first and second closure parts 1 and 2 are (also) displaced relative to one another transversely to the closing direction Z and thus transversely to the longitudinal axis of the pin-shaped, projecting engagement portion 21 during the magnetically assisted transfer into the closed position.

[0068] The example of Figures 3A and 3B Functionally corresponds in many ways to the example of Figures 2A to 2C In contrast to the example of Figures 2A to 2C provides for a locking device V of the Figures 3A and 3Bmerely provides, among other things, that a handle element 4 is not formed by a cord-like flexible element, but again by a band that is movably held on a bearing eyelet 14 of the first base body 10 of the first closure part.

[0069] In addition, the handle element 4 with its tab-like extension is not as in the example of the Figures 2A to 2C (or the Figures 1A to 1E) is oriented substantially opposite to the direction of load applied via a shoelace 3. Rather, the grip element 4 extends with its tab-like extension substantially at an angle of 90° to two pairs of shoelaces 3a, 3b, which are attached to the first base body 10 of the first closure part 1. The two shoelaces 3a and 3b are guided through fastening channels 13a and 13b through the first base body 10, which extend parallel to one another and each along secants on both sides of the central engagement opening 12.

[0070] In the example of Figures 1A to 4F , a first closure part 1 is formed with a circular disk-shaped base body 10. However, a central opening 12 of the first base body 10 does not serve as in the example of Figures 2A-2C and 3A-3Bas an engagement opening for an engagement section of a second closure part 2. Rather, the central opening on the first base body of the example of the Figures 4A to 4F provided as a fastening opening 12 through which both a section of a shoelace 3 and a section of a flexible grip element 4 are guided and thus held on the first base body 10 of the first closure part 1.

[0071] Securing the closed position and absorbing shear and tilting forces when the locking device V is closed is demonstrated in the example of Figures 4A to 4Fvia locking sections in the form of locking webs 22a and 22b, which are formed on a disk-shaped base body 20 of a second closure part 2, as an example here. These locking webs 22a and 22b protrude from a base surface of the second base body 20 essentially perpendicularly (opposite to the closing direction Z). Under the effect of the magnetically attractive permanent magnets 101a, 101b and 201a, 201b of the base bodies 10 and 20 of the two closure parts 1 and 2, the two base bodies 10 and 20 are arranged in the closed position as intended in such a way that locking hooks 220a and 220b defining undercut areas at the upper ends of the locking webs 22a, 22b engage over the base body 10 on the circumference, i.e., on an outer edge.The locking hooks 220a and 220b thus each engage circumferentially over a section of the first base body 10 which borders the central fastening opening 12 and thus secure the closed position of the closure device V.

[0072] Furthermore, a platform 200 is formed on the disc-shaped second base body 20 of the second closure part 2. This platform protrudes in the direction of the first base body 10 of the first closure part 1 and, in the closed position, rests on the upper side of the first base body 10 with its underside. The platform 200 has two opposing recesses 203 and 204. A first recess 203 prevents the grip element 4 from becoming jammed between the two base bodies 10 and 20, so that the grip element 4 extends at least partially through this first recess in the closed position, and the grip element 4 remains movable and, in particular, pivotable even in the closed position. The second recess 203 in the platform 200 similarly prevents the shoelace 3 from becoming jammed between the two first and second base bodies 10 and 20 in the closed position.The shoelace 3 threaded into the central fastening opening 12 of the first base body 10 thus remains movable relative to the closure parts 1 and 2, just like the flexible grip element 4, even in the closed position.

[0073] Especially in the example of Figures 4A to 4F (However, also in the embodiment variant explained above and the other examples), instead of the separate permanent magnets 101a, 101b, 201a, 201b arranged on a base body 10 or 20, it can also be provided that the respective base body 10 or 20 consists entirely or partially of magnetic or ferromagnetic material. Thus, for example, the circular disk-shaped first base body 10 can also be formed by or with a metallic washer.

[0074] Advantageously, even with a different implementation of the magnetic support, in an example according to the Figures 4A to 4Fensured that under the effect of the attractive magnetic forces, the first and second closure parts 1 and 2 are aligned with each other in the closed position in such a way that the area of ​​the first base body 10 of the first closure part 1, on which the shoelace 3 engages, lies between the two locking webs 22a and 22b and thus occurring tilting forces can be absorbed by the locking webs 22a and 22b.

[0075] The idea underlying the invention is not limited to the embodiment described above, but can also be implemented in a completely different way.

[0076] A fastening device of the type described here can be used in a variety of ways, for example on a piece of clothing, for example a shoe, a jacket, a shirt or the like.

[0077] In a specific embodiment, a shoe, in particular a sports shoe, has a closure device of the type described here. The closure device serves, for example, to close and, if necessary, tighten the shoe (for example, in a ski boot). Accordingly, a shoe closure can be formed with a proposed closure device.

[0078] However, a proposed closure device can also be used, for example, on a medical device, such as an orthosis or a prosthesis.

[0079] For example, discrete magnetic elements can be used as magnets, which are inserted into associated recesses on the base body and glued to the base body, for example using an epoxy adhesive.

[0080] The magnets can each be formed by a permanent magnet element. Alternatively, it is also conceivable to provide permanent magnet elements on one closure part, for example, and passive magnetic elements in the form of ferromagnetic armatures on the other closure part, which interact with the permanent magnets in a magnetically attractive manner.

[0081] Alternatively, it is also conceivable to manufacture the base bodies of the closure parts themselves, at least partially, from a magnetic, ferromagnetic or magnetized material instead of discrete elements. List of reference symbols

[0082] 1First closure part 10Base body 101a, 101bFirst (permanent) magnet 10a, 10bReceiving opening 11a, 11bEngaging section 12Engaging opening / fastening opening 13, 13a, 13bFastening eyelet / fastening channel (fastening opening) 14Bearing eyelet 2Second closure part 20Base body 200Platform 201, 201a, 201bSecond (permanent) magnet 203, 204Recess 21Engaging section 21aContact surface 210Mushroom head (undercut area) 220a, 220bLocking hook (undercut area) 22a, 22bLocking web 3, 3a, 3bLace (tensioning element) 4Grip element 5Free space Fa, FbLoad M1, M2Magnetization direction RLisplacement direction VClosing device ZClosing direction

Claims

1. A closure device for releasably connecting two parts with each other, comprising - a first closure part (1) which includes a first base body (10) with an engagement opening (12), and - a second closure part (2) which includes a second base body (20) and at least one engagement portion (21) formed on the second base body (20), wherein the first closure part (1) and the second closure part (2) can be attached to each other such that in a closed position the engagement portion (21) is at least partly received in the engagement opening (12) to support a load (Fa, Fb) acting between the first closure part (1) and the second closure part (2) along a load direction, and holding of the first and second closure parts (1, 2) against each other in the closed position is magnetically supported, and wherein the engagement opening (12) is formed on the first base body (10) as a through opening into which the engagement portion (21) protrudes in the closed position, characterized in that the engagement portion (21) includes an abutment surface (21a) which in the closed position is in abutment with a portion (11a) of the first closure part (1) bordering the through opening (12) to support a load (Fa, Fb) acting on the second closure part (2) in the load direction, and the abutment surface (21a) is inclined relative to the load direction and to a closing direction (Z), along which the first closure part (1) and the second closure part (2) can be attached to each other such that in the case of a load acting on the second closure part (2) in the load direction the engagement portion (21) is loaded with a force component in closing direction (Z) relative to the first closure part (1).

2. The closure device according to claim 1, characterized in that in the closed position the engagement portion (21) of the second closure part (2) passes through the engagement opening (12) and / or in the closed position the retention of the first and second closure parts (1, 2) against each other is magnetically supported by at least one magnet (101, 101b; 201, 201a, 201b) of the first or second closure part (1, 2) and / or between the first base body (10) and the second base body (20) a predefined clearance (5) is formed in the closed position.

3. The closure device according to claim 1 or 2, characterized in that the engagement portion (21) protrudes from the second base body (20) in the manner of a web, in particular transversely to the load direction, and / or two portions (11a, 11b) formed on the first base body (10) are spaced apart from each other along the load direction (B) and between themselves form the engagement opening (12) configured as a through opening.

4. The closure device according to claim 1 or 2, characterized in that the engagement portion (21) protrudes from the second base body (20) in the shape of a pin, in particular transversely to the load direction.

5. The closure device according to any of the preceding claims, characterized in that the engagement portion (21) includes an undercut region (210) against which a portion of the first closure part (1) bordering the engagement opening (12) rests in the closed position and when a load acts on the second closure part (2) in the load direction, and which at least partly engages over the portion bordering the engagement opening (12).

6. A closure device according to any of the preceding claims, characterized in that on at least one of the first and second base bodies (10, 20) at least one continuous opening (12, 13, 13a, 13b) is formed, through which a flexible tightening element (3, 3a, 3b) is guided, which in the closed position transmits the load acting along the load direction to the closure parts (1, 2), and is held on the first or second base body (10, 20).

7. The closure device according to claim 6, characterized in that the flexible tightening element (3, 3a, 3b) comprises a shoelace, a cord, a rope, a string or a ribbon and / or the continuous opening (13, 13a, 13b) extends in the first or second base body (10, 20) in the manner of a channel or is formed on the first or second base body (10, 20) in the form of an eyelet.

8. A shoe closure with a closure device according to any of the preceding claims.

9. An article of clothing, in particular a shoe, jacket or shirt, with a closure device according to any of the preceding claims.