Closure device for releasably connecting two parts

Abstract

Disclosed is a closure device for releasably connecting two parts, including a first closure part which includes a first base body, and a second closure part which includes a second base body. The first closure part and the second closure part can be attached to each other such that in a closed position the first base body and the second base body at least partly are at least positively connected with each other to support a load acting between the first closure part and the second closure part along a load direction, and holding of the first and second closure parts against each other in the closed position is magnetically supported. An engagement opening is formed on the first base body as a through opening into which an engagement portion of the second base body protrudes in the closed position.

Claims

1. A closure device for releasably connecting two parts with each other, comprising a first closure part which includes a first base body with an engagement opening, and a second closure part which includes a second base body and at least one engagement portion formed on the second base body, wherein the at least one engagement portion extends from an upper surface of the second base body, wherein the first closure part and the second closure part can be attached to each other such that in a closed position the engagement portion is at least partly received in the engagement opening to support a load acting between the first closure part and the second closure part along a load direction, and holding of the first and second base bodies against each other in the closed position is magnetically supported by at least two magnets positioned in the first base body and at least one magnet positioned in the at least one engagement portion, and wherein the engagement opening is formed on the first base body as a through opening through which the engagement portion protrudes in the closed position, and wherein, in the closed position, the at least one magnet positioned in the at least one engagement portion is positioned between the at least two magnets positioned in the first base body.

2. The closure device according to claim 1, wherein in the closed position the engagement portion of the second closure part passes through the engagement opening.

3. The closure device according to claim 1, wherein at least one of the engagement portion protrudes from the second base body in the manner of a web, in particular transversely to the load direction, and two portions formed on the first base body are spaced apart from each other along the load direction and between themselves form the engagement opening configured as a through opening.

4. The closure device according to claim 1, wherein the engagement portion protrudes from the second base body in the shape of a pin, in particular transversely to the load direction.

5. The closure device according to claim 4, wherein the engagement portion protruding in the shape of a pin is at least one of the following: is of rotationally symmetrical design and comprises a mushroom-head-shaped end portion at an end which in the closed position protrudes into or through the engagement opening.

6. The closure device according to claim 1, wherein the engagement portion includes an abutment surface which in the closed position is in abutment with a portion of the first closure part bordering the through opening to support a load acting on the second closure part in the load direction.

7. The closure device according to claim 6, wherein the abutment surface is inclined relative to the load direction and to a closing direction, along which the first closure part and the second closure part can be attached to each other such that in the case of a load acting on the second closure part in the load direction, the engagement portion is loaded with a force component in the closing direction relative to the first closure part.

8. The closure device according to claim 1, wherein the engagement portion includes an undercut region against which a portion of the first closure part bordering the engagement opening rests in the closed position and when a load acts on the second closure part in the load direction, and which at least partly engages over the portion bordering the engagement opening.

9. The closure device according to claim 1, wherein in the closed position the retention of the first and second closure parts against each other is magnetically supported by at least one magnet of the first or second closure part.

10. The closure device according to claim 1, wherein between the first base body and the second base body a predefined clearance is formed in the closed position.

11. The closure device according to claim 1, wherein a grip element is provided on the first or second base body for manually releasing the closure parts from each other.

12. The closure device according to claim 11, wherein the grip element is at least one of the following: is flexible and is held on a continuous opening of the first or second base body.

13. A shoe closure with a closure device according to claim 1.

14. An article of clothing with a closure device according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The idea underlying the solution will be explained in detail below with reference to embodiments illustrated in the Figures by way of example.

(2) FIGS. 1A-1E show various views of a first design variant of a proposed closure device in which a web-like engagement portion of a second closure part passes through an engagement opening configured as a through opening of a first closure part on which eyelets for flexible tightening elements are provided;

(3) FIGS. 2A-2C in various views show a further design variant of a proposed closure device with a circular ring-shaped first base body of a first closure part, in whose engagement opening configured as a through opening a rotationally symmetrical engagement portion with a mushroom-head-shaped end portion of a second base body of a second closure part lockingly engages in the closed position and on which a through opening extending in the manner of a channel is formed for connecting a tightening element with the first base body;

(4) FIGS. 3A-3B in various views show a further design variant of a proposed closure device with a circular ring-shaped first base body of a first closure part analogous to the design variant of FIGS. 2A to 2C, but with a differently designed connection to a plurality of flexible tightening elements;

(5) FIGS. 4A-4F in various views show a further design variant of a proposed closure device with a circular ring-shaped first base body of a first closure part, in which a tightening element and a grip element are held on a central through opening and which in the closed position is positively held on the second base body of the second closure part by web-like protruding (latching) portions with an undercut region.

DESCRIPTION OF THE INVENTION

(6) The attached FIGS. 1A-1E, 2A-2C, 3A-3B and 4A-4F by way of example illustrate different design variants of a proposed closure device V in which two closure parts 1 and 2 include first and second base bodies 10, 20 via which the two closure parts 1 and 2 are positively connected with each other to at least partly support a load Fa, Fb acting along a load direction, and an attachment of the two closure parts 1 and 2 to each other as well as a retention of the closure pars 1 and 2 against each other is magnetically supported in a closed position.

(7) In the illustrated exemplary embodiments 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 for example are arranged in receiving openings 10a, 10b of a base body 10 formed therefor. Alternatively, a corresponding (permanent) magnet at least can also be embedded in the material of which the respective base body 10 or 11 is made. It can also be provided that at least one base body 10 or 20 is at least partly made of a ferromagnetic or magnetized material or consists of a magnet.

(8) The design variants of FIGS. 1A to 4F each show a closure device V which can be used for a closure on an article of clothing. In particular, the illustrated design variants can be used as part of a shoe closure so that at least one tightening element 3, 3a, 3b each engaging a first base body 10 of a first closure part 1 can be a shoelace, while the second closure part 2 with its base body 20 is provided on an upper of the shoe, for example in the vicinity of a tongue of the shoe.

(9) In the design variant of FIGS. 1A to 1E a continuous engagement opening 12 is formed between engagement portions 11a, 11b spaced apart from each other (along a load direction) on the first base body 10 of the first closure part 1. In a closed position shown in FIGS. 1B, 1D and 1E an engagement portion 21 protruding from a second base body 20 of the second closure part 2 in the manner of a web engages into this engagement opening 12.

(10) As is clearly shown in particular with reference to the exploded view of FIG. 1E and the sectional view of FIG. 1E, permanent magnets 101a, 101b and 201 are arranged both in the engagement portions 11a, 11b of the first base body 10 and in the engagement portion 21 of the second base body 20 protruding in the manner of a web. The (first) permanent magnets 101a and 101b on the first base body 10 have a first magnetization direction M1 (cf. FIG. 1E) which points from a north pole N to a south pole S of the respective first permanent magnet 101a, 101b. Correspondingly, the engagement portion 21 of the second base body 20 comprises a second permanent magnet 201 with a second magnetization direction M2 which points from a north pole N to a south pole S of the second permanent magnet 201. In the illustrated closure device V the permanent magnets 101a, 101b and 201 are arranged in recesses or receiving openings provided therefor in the engagement portions 11a, 11b and 21.

(11) For closing the closure device V the first closure part 1 and the second closure part 2 can be attached to each other along a closing direction Z such that the closure device V takes 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 each other and perpendicularly to the closing direction Z.

(12) In the closed position, an attractive magnetic force which is directed substantially perpendicularly to the closing direction Z each acts between the engagement portion 21 of the second closure part 2 on the one hand and each of the two engagement portions 11a, 11b of the first closure part 1, which form the engagement opening 12, on the other hand, corresponding to the orientation of the north and south poles N, S facing each other. The attractive magnetic forces directed perpendicularly to the closing direction Z safely hold the closure device V in its closed position.

(13) For generating the attractive magnetic forces in the closed position, the permanent magnets 101a, 101b and 201 are arranged in the respective engagement portions 11a, 11b and 21 such that the first magnetization direction M1 and the second magnetization direction M2 extend parallel to each other and are directed substantially perpendicularly to the closing direction Z. In the closed position, the magnetization directions M1 and M2 as well as the attractive magnetic forces thus extend substantially parallel to the base bodies 10 and 20. In this way, a particularly simple closing operation becomes possible, as a user merely has to attach the closure parts 1, 2 to each other along the closing direction Z.

(14) In the closed position, the first magnetization direction M1 of the permanent magnets 101a, 101b arranged in the engagement portions 11a, 11b of the first closure part 1 and the second magnetization direction M2 of the second permanent magnet 201 arranged in the engagement portion 21 of the second closure part 2 extend parallel to each other and are directed substantially perpendicularly to the closing direction Z. With respect to the first magnetization direction M1 and the second magnetization direction M2 the engagement portions 11a, 11b and 21 are arranged one behind the other. The attractive magnetic forces correspondingly directed perpendicularly to the closing direction Z also hold the closure device V in its closed position when a shear force is applied to the closure parts 1, 2, unless the shear force exceeds the magnetic forces. An inadvertent opening of the closure device V can be prevented in this way.

(15) The engagement portion 21 of the second closure part 2 has the basic shape of a parallelogram non-right-angled in cross-section so that an abutment surface 21a of the engagement portion 21 of the second closure part 2 is inclined both to the closing direction Z and to a load direction which is introduced into the closure device V via shoelaces 3a, 3b engaging the first closure part 1. Correspondingly, the engagement portion 21 of the second closure part 2 extends with an inclination to the closing direction Z and in the closed position is brought into a self-amplifying abutment with an associated engagement portion 11a of the first closure part 1 which borders the engagement opening 12. Due to the inclination of the abutment surface 21a it is effected in particular that under a load acting in the load direction corresponding to the forces Fa, Fb on the second closure part 2 as shown in FIG. 1B a force component—by force deflection—acts on the engagement portion 21 of the second closure part 2 in the direction of an engagement with the engagement opening 12 between the engagement portions 11a, 11b of the first closure part 1 so that under a load the engagement is additionally secured.

(16) The base body 10 of the first closure part 1 of the design variant of FIGS. 1A to 1E includes two fastening eyelets 13a and 13b at an 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. Through the fastening eyelets 13a and 13b a portion of the shoelaces 3a, 3b each is guided and thereby held on the first closure part 1. On the base body 10 including the engagement opening 12 with the engagement portions 11a and 11b carrying the permanent magnets 101a, 101b fastening eyelets 13a and 13b for the shoelaces 3a and 3b thus are formed so that the shoelaces 3a, 3b are tightened by pulling on the first closure part 1, and by maintaining the tension of the shoelaces 3a, 3b the first closure part 1 can be attached to the second closure part 2 with magnetic support.

(17) To facilitate gripping the first closure part 1 on opening and closing of the closure device V, a grip tab or grip element 4 is provided on the first closure part 1. This grip element 4 for example is formed by a textile, leather, rubber or plastic ribbon and at a front end of the first closure part 1 is held at a clevis 14 of the first base body 10. A portion of the grip element 14 thus wraps around a transverse web bordering the clevis 4 on the first base body 10.

(18) A user of the closure device V can grasp the grip element 4 by a protruding tab-like portion of the grip element 4 and for example lift the first closure part 1 in the closed position from the second closure part 2 by pulling along a displacement direction R which extends opposite to the load direction, which is applied by the tightened shoelaces 3a and 3b. By pulling the grip element 4 along the displacement direction R, the first base body 10 of the first closure part 1 and in particular its engagement portion 21 can be displaced with respect to the second closure part 2 to such an extent that the engagement portion 21 with its abutment surface 21a no longer positively and non-positively rests against the engagement portion 11a of the first closure part 1 and hence the first closure part 1 can be lifted from the second closure part 2 and hence can be released.

(19) As is shown in FIG. 1D in particular with reference to the sectional representation along the sectional line A-A of FIG. 1C, a clearance 5 is present between the first and second closure parts 1 and 2 in the closed position. Between an upper side of the second base body 20, from which the engagement portion 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 clearance 5 thus is present on both sides of the engagement portion 21 protruding in the manner of a web. This clearance 5 can serve as an additional dipping reserve in order to for example displace the first closure part 1 further in the closing direction Z along the engagement portion 21 of the second closure part 2 in the case of a higher load. Furthermore, the clearance 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 thickness. For this purpose, a gap height of the clearance 5 then is dimensioned such that materials of different thickness can be arranged in the clearance 5 with one portion.

(20) For example, in the design variant of FIGS. 1A to 1E the first and second base bodies 10 and 20 can be designed at least partly flexible, although this is of course not absolutely necessary. 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 the manner of a web, can be configured flexible, while the engagement portion 21 itself is rigid.

(21) In the design variant of FIGS. 2A to 2C the second closure part 2 is configured with a disk-shaped second base body 20 on which a pin-like protruding engagement portion 21 with a mushroom head 210 is centrally formed as an undercut region. In the closed position, the engagement portion 21 with the mushroom head 210 passes through a centrally arranged engagement opening 12 in a circular disk-shaped first base body 10 of a first closure part 1 of the design variant of FIGS. 2A to 2C. In the closure device V of FIGS. 2A to 2C an arrestment of the two closure parts 1 and 2 at each other independent of the direction is possible via the rotationally symmetrical configuration of the engagement portion 21 with the rotationally symmetrical mushroom head 210.

(22) When a load is applied via a shoelace 3 connected with the first closure part 1, it is ensured that the first closure part 1 cannot easily be separated from the second closure part 2 and in particular the mushroom head 210, in that the mushroom head 210 at least partly engages over an (inner) edge of a portion of the first base body 10 bordering the engagement opening 12. Due to the load on the first closure part 1, which is applied via a shoelace 3, the first closure part 1 is displaced transversely to a longitudinal axis of the protruding pin-like engagement portion 21 with the mushroom head 210 so that a protruding edge of the mushroom head 210 at least partly engages over the inner edge of the engagement opening 12 of the first base body 10. The first base body 10 hence can only be lifted from the second base body 20 of the second closure part 2 and in particular from the pin-like engagement portion 21 after the first base body 10 has been pulled along the displacement direction R opposite to the load direction and a middle axis of the engagement opening 12 and a longitudinal axis of the protruding pin-like engagement portion 21 with the mushroom head 210 again are coaxial to each other.

(23) For the easier handling and in particular the displacement of the first closure part 1, a flexible grip element 4 extending in the manner of a loop is held on the first base body 10 in the design variant of FIGS. 2A to 2C. A portion of a string, a rope or a cord 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 substantially parallel to a disk plane and hence for example along a secant of a circle enclosing the contour of the first base body 10.

(24) Analogously, there is provided a fixing opening in the form of a fixing channel 13 traversing the first base body 10, through which a portion of the shoelace 3 extends.

(25) To magnetically support the attachment of the two closure parts 1 and 2 also in the design variant of FIGS. 2A to 2C, 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 or on the second base body radially spaced from the central pin-like protruding engagement portion 21 including the mushroom head 210.

(26) The arrangement of these permanent magnets 101a, 101b, 201a, 201b here for example is chosen such that in the closed position and without a load being applied on the first closure part by tightening the shoelace 3 an undercut region provided by the radially protruding edge of the mushroom head 210 is not in engagement with the first base body 10 of the first closure part. Only on application of a load and after a resulting movement of the first and second base bodies relative to each other the mushroom head 210 positively engages over the first base body 10 of the first closure part 1 on the inner edge of the engagement opening 12.

(27) Alternatively, the permanent magnets 101a, 101b, 201a, 201b can be arranged such that already in an unloaded condition of the closure device V the undercut provided by the mushroom head 210 is in engagement. Via the magnets 101a, 101b, 202a, 202b it here is ensured for example with a corresponding arrangement that the two base bodies 10 and 20 of the first and second closure parts 1 and 2 are displaced relative to each other in the case of the magnetically supported transfer into the closed position (also) transversely to the closing direction Z and hence transversely to the longitudinal axis of the protruding pin-like engagement portion 21.

(28) The design variant of FIGS. 3A and 3B to a large extent functionally corresponds to the design variant of FIGS. 2A to 2C. In contrast to the design variant of FIGS. 2A to 2C a closure device V of FIGS. 3A and 3B merely provides among other things that a grip element 4 is not formed by a cord-like flexible element, but again by a ribbon which is movably held on a clevis 14 of the first base body 10 of the first closure part.

(29) In addition, the grip element 4 with its tab-like protrusion is not oriented substantially opposite to the direction of the load applied via a shoelace 3 like in the design variant of FIGS. 2A to 2C (or of FIGS. 1A to 1E). Rather, the grip element 4 with its tab-like protrusion here extends substantially at an angle of 90° to two shoelace pairs 3a, 3b which are fixed to the first base body 10 of the first closure part 1. The two shoelaces 3a and 3b here are guided through fixing channels 13a and 13b through the first base body 10, which extend parallel to each other and each along secants on both sides of the central engagement opening 12.

(30) In the design variant of FIGS. 4A to 4F, a first closure part 1 is formed with a circular ring-shaped base body 10. A central opening 12 of the first base body 10 however does not serve as an engagement opening for an engagement portion of a second closure part 2 like e.g. in the design variant of FIGS. 2A-2C and 3A-3B. The central opening rather is provided as a fixing opening on the first base body of the design variant of FIGS. 4A to 4F, through which both a portion of a shoelace 3 and a portion of a flexible grip element 4 are guided and are held on the first base body 10 of the first closure part 1.

(31) In the design variant of FIGS. 4A to 4F, securing the closed position and an absorption of shear and tilting forces with a closed closure device V is achieved via latching portions in the form of latching webs 22a and 22b which are formed on a disk-shaped base body 20 of a second closure part 2 shown here by way of example. These latching webs 22a and 22b protrude from a base surface of the second base body 20 substantially perpendicularly (opposite to the closing direction Z). Under the influence of the permanent magnets 101a, 101b and 201a, 201b of the base bodies 10 and 20 of the two closure parts 1 and 2, which magnetically attract each other, the two base bodies 10 and 20 are properly arranged relative to each other in the closed position such that latching hooks 220a and 220b defining undercut regions at upper ends of the latching webs 22a, 22b circumferentially, i.e. at an outer edge, engage over the base body 10. The latching hooks 220a and 220b thus each circumferentially engage over a portion of the first base body 10 which borders the central fixing opening 12, and thus secure the closed position of the closure device V.

(32) On the disk-shaped second base body 20 of the second closure part 2 a platform 200 furthermore is formed, which protrudes in the direction of the first base body 10 of the first closure part 1 and on whose upper side the first base body 10 rests with its underside in the closed position. The platform 200 includes two cutouts 203 and 204 facing each other. Via a first cutout 203 jamming of the grip element 4 between the two base bodies 10 and 20 is prevented so that in the closed position the grip element 4 at least partly extends through this first cutout and the grip element 4 continues to be movable and in particular pivotable also in the closed position. In the closed position, the second cutout 203 in the platform 200 analogously prevents pinching of the shoelace 3 between the two first and second base bodies 10 and 20. Thus, the shoelace 3 threaded into the central fixing opening 12 of the first base body 10 just like the flexible grip element 4 continues to be movable relative to the closure parts 1 and 2 also in the closed position.

(33) In particular in the design variant of FIGS. 4A to 4F (but also in the remaining design variants explained above) it can also be provided instead of the separate permanent magnets 101a, 101b, 201a, 201b arranged on a base body 10 or 20 that the respective base body 10 or 20 is completely or partly made of a magnetic or ferromagnetic material. In this way, e.g. the circular ring-shaped first base body 10 can also be formed by or with a metallic washer.

(34) Advantageously—also in the case of a different realization of the magnetic support—it is ensured in a design variant according to FIGS. 4A to 4F that under the influence of the attractive magnetic forces the first and second closure parts 1 are aligned relative to each other in the closed position such that the region of the first base body 10 of the first closure part 1, which is engaged by the shoelace 3, lies between the two latching webs 22a and 22b and occurring tilting forces hence can be absorbed by the latching webs 22a and 22b.

(35) The idea underlying the solution is not limited to the exemplary embodiments described above, but can also be realized in a completely different way.

(36) A closure device as described here can be used in a completely different way, for example on an article of clothing, for example on a shoe, a jacket, a shirt or the like.

(37) In a concrete embodiment, a shoe, in particular a sports shoe, includes a closure device as described here. The closure device serves e.g. for closing and possibly tightening the shoe (for example in the case of a ski boot). Correspondingly, a shoe closure can be formed with a proposed closure device.

(38) A proposed closure device can, however, also be used for example on a medical implement, for example on an orthosis or a prosthesis.

(39) As magnet, discrete magnetic elements can be used for example, which are inserted for example into associated cutouts on the base body and are glued to the base body, for example by using an epoxy adhesive.

(40) The magnets can each be formed by a permanent magnet element. Alternatively, it is also conceivable to provide for example permanent magnet elements on one closure part, but on the other closure part passive magnet elements in the form of ferromagnetic armatures which cooperate with the permanent magnets in a magnetically attractive manner.

(41) Alternatively, it is in turn also conceivable to manufacture the base bodies of the closure parts themselves at least partly from a magnetic, ferromagnetic or magnetized material, instead of discrete elements.

LIST OF REFERENCE NUMERALS

(42) 1 first closure part 10 base body 101a, 101b first (permanent) magnet 10a, 10b receiving opening 11a, 11b engagement portion 12 engagement opening/fixing opening 13, 13a, 13b fixing eyelet/fixing channel (fixing opening) 14 clevis 2 second closure part 20 base body 200 platform 201, 201a, 201b second (permanent) magnet 203, 204 cutout 21 engagement portion 21a abutment surface 210 mushroom head (undercut region) 220a, 220b latching hook (undercut region) 22a, 22b latching web 3, 3a, 3b shoelace (tightening element) 4 grip element 5 clearance Fa, Fb load M1, M2 magnetization direction R displacement direction V closure device Z closing direction