Fastener device having a winding element

A fastener device includes a first fastener part and a second fastener part which can be mounted on one another along a closing direction, are held against one another in a closed position, and are releasable from one another in order to open the fastener device. The second fastener part has an actuating element with a first engagement means and has a winding element which is arranged on the actuating element and which is rotatable in a winding direction in order to wind up a tension element and which has a second engagement means. The first and the second engagement means, in a release position, are not in engagement with one another, such that the winding element is rotatable relative to the actuating element, and can be placed in engagement with one another, such that, in an engagement position, the winding element is rotatable by means of the actuating element.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the United States national phase of International Application No. PCT/EP2018/054971 filed Feb. 28, 2018, and claims priority to German Patent Application Nos. 10 2017 220 305.6 filed Nov. 14, 2017, and 10 2018 201 021.8 filed Jan. 23, 2018, the disclosures of which are hereby incorporated by reference in their entirety.

BACKGROUND OF THE INVENTION

Field of the Invention

The disclosure relates to a fastener device.

Technical Considerations

A fastener device of said type comprises a first fastener part and a second fastener part which can be mounted on one another along a closing direction, are held against one another in a closed position, and are releasable from one another in order to open the fastener device.

A fastener device of said type serves generally for connecting two parts together. For example, a fastener device of said type may provide a fastener for a container, for example a bag or a rucksack. A fastener device of said type may however also serve for example as a fastener for a shoe, for example a sports shoe. Very generally, the fastener device may serve for connecting any two assemblies with load-bearing action.

It may be desirable here that a fastener device of said type cannot only be used for detachably connecting two parts together but also permits tightening. For example, in the case of a fastener for a rucksack or in the case of a fastener for a shoe, it may be desirable for parts to be able to be firstly mounted on one another but secondly also tightened relative to one another.

A tightening device with a tension element that can be wound up on a winding element is described for example in WO 2015/006616 A1.

SUMMARY OF THE INVENTION

It is an object underlying the proposed solution to provide a fastener device which permits firstly detachable connection of assemblies to one another but secondly also tightening of the assemblies relative to one another.

Said object is achieved by a fastener device with features as described herein.

Accordingly, the second fastener part has an actuating element with a first engagement means and has a winding element which is arranged on the actuating element and which is rotatable in a winding direction in order to wind up a tension element and which has a second engagement means. The first engagement means and the second engagement means, in a release position, are not in engagement with one another, such that the winding element is rotatable relative to the actuating element. The first engagement means and the second engagement means can be placed in engagement with one another, such that, in an engagement position, the winding element is rotatable by means of the actuating element. The first fastener part has a first toothing means and the second fastener part has a second toothing means. The first toothing means and the second toothing means, in the closed position of the fastener device, are in engagement with one another such that the first fastener part and the second fastener part are held in positive locking fashion relative to one another along the winding direction.

With the proposed fastener device, a fastener for detachably connecting two parts together and a tightening device are combined with one another. Firstly, the fastener device has two fastener parts which can be mounted on one another along a closing direction and are held against one another in a closed position, such that assemblies assigned to the fastener parts are connected together by means of the fastener parts and by virtue of said fastener parts being held against one another, and the assemblies can also be released from one another again by virtue of the fastener parts being separated from one another. Secondly, the second fastener part has a winding element on which a tension element can be arranged. The winding element may for example have the form of a cylindrical roller and may bear a winding channel in which the tension element can be received. By rotating the winding element, the tension element can thus be wound up and thus tightened.

Whereas the first fastener part may be arranged on a first assembly, the second fastener part may be connected to a second assembly via the tension element, wherein, by virtue of the tension element being wound up on the winding element, the first assembly and the second assembly can be tightened relative to one another.

The tension element may for example be a flexible element which is suitable (exclusively) for transmitting tensile forces. The tension element may for example be a cable, a strap, a band, a belt, a chain or a (an electrically conductive) cable.

The tension element may for example be secured with two ends on the winding element, such that, by rotation of the winding element, the tension element can be wound with its two ends onto the winding element. It is however also conceivable and possible for only one end of the tension element to be secured on the winding element, in order for only said one end to be wound up by rotation of the winding element. It is furthermore also conceivable and possible for an inner portion of the tension element to be arranged on the winding element in order for the tension element to be wound up by rotation of the winding element. It is also conceivable for multiple different tension elements to be arranged on the winding element and to be able to be wound up by means of the winding element.

In the fastener device, the actuating element and the winding element are (releasably) operatively connected to one another by means of engagement devices. This makes it possible, in particular when the fastener device is in the closed position, for the winding element to be rotated by actuation of the actuating element, such that a tension element arranged on the winding element can be wound up onto the winding element. In the closed position, the first engagement means of the actuating element and the second engagement means of the winding element are, for this purpose, in engagement with one another, such that an actuating force is transmitted from the actuating element to the winding element and the winding element is thus rotated together with the actuating element.

The engagement means may however be released from their engagement in order to permit a relative movement between the actuating element and the winding element. This permits, for example when the fastener device is open, an independent rotation of the winding element relative to the actuating element, such that, when the fastener device is open, the tension element can for example be easily unwound from the winding element without the actuating element having to be jointly rotated in the process. This can considerably simplify the actuation of the fastener device.

In the closed position of the fastener device, the first engagement means and the second engagement means are preferably in the engagement position, and are held in this engagement position. In the closed position of the fastener device, the actuating element and the winding element are thus operatively connected to one another, such that a rotation of the actuating element leads to a rotation of the winding element and thus an actuating force is introduced from the actuating element into the winding element.

The engagement means may, in one embodiment, be designed such that, in the engagement position, a rigid, load-bearing and bidirectional connection is produced between the actuating element and the winding element. The actuating element and the winding element are thus rotatable only jointly in the winding direction and counter to the winding direction.

In another embodiment, the engagement between the first engagement means and the second engagement means may however also be such that actuating forces during an adjustment of the actuating element in the winding direction are transmitted to the winding element, but a rotation of the actuating element counter to the winding direction does not lead to a rotation of the winding element, but rather the actuating element is rotatable independently of the winding element counter to the winding direction. For this purpose, one of the engagement means or else both engagement means may for example have a sawtooth-like form such that, in the event of engagement during a rotation of the actuating element in the winding direction, the engagement means lock relative to one another and thus the winding element is rotated together with the actuating element, but in the event of a rotation of the actuating element counter to the winding direction, the engagement means can slide over one another, and in particular, no (significant) transmission of force takes place via the engagement means.

The engagement means are for example attached, in encircling fashion around the closing direction, at one side to the actuating element and at the other side to the winding element. The engagement means are in this case formed on surfaces, facing toward one another, of the actuating element and of the winding element.

In one specific abutment, the winding element may for example have a sawtooth-like toothing which realizes the second engagement means, whereas the first engagement means of the actuating element is formed by a series of engagement openings lined up in a row, with which the sawtooth-like toothing of the winding element engages in the engagement position.

For the movement of the engagement means between the release position and the engagement position, the actuating element and the winding element may for example be adjusted axially along the closing direction relative to one another. In the release position, surfaces of the actuating element and of the winding element on which the engagement means are formed are moved axially apart from one another along the closing direction, such that the engagement means are no longer in engagement with one another. By contrast, in the engagement position, the surfaces have been moved toward one another, such that there is engagement between the engagement means.

In one embodiment, the actuating element and the winding element are spring-preloaded relative to one another, for example in the direction of the release position. For this purpose, it is for example possible for a spring element, for example in the form of a spiral spring or else in the form of a spring injection-molded on the actuating element or on the winding element, to act between the actuating element and the winding element, which spring imparts a spring-mechanical preload between the actuating element and the winding element in the direction of the release position. If no other forces act between the actuating element and the winding element, in particular if the fastener device is situated in its opened position, then the actuating element and the carrier element are not engagement with one another, such that the winding element can be rotated independently of the actuating element for example for an unwinding of the tension element.

In addition to the engagement means which serve for producing a (releasable) operative connection between the actuating element and the winding element, the first fastener part and the second fastener part each have a toothing means, which toothing means, in the closed position of the fastener device, produce a positively locking hold, along the winding direction, of the fastener parts relative to one another.

Positively locking hold is to be understood here to mean that at least certain forces acting along the winding direction between the fastener parts can be supported and dissipated in positively locking fashion, without the fastener parts being adjusted relative to one another along the winding direction as a result. Such a positively locking hold may exist in the winding direction and also counter to the winding direction. It is however also conceivable and possible for forces to be supported only in one direction, that is to say in the winding direction or counter to the winding direction.

Here, the positively locking hold may be such that a movement of the second fastener part in the closed position relative to the first fastener part counter to the winding direction and/or in the winding direction is locked, that is to say the positive locking hold cannot be readily overcome, at least not without removing the second fastener part from the first fastener part. The positive locking hold may however alternatively also be such that, if a certain threshold torque is exceeded, which is dependent on the geometry of the toothing means, the positive locking hold can be overcome, such that the second fastener part can, in the event of a force being introduced with which the threshold torque is exceeded, be rotated relative to the first fastener part in the winding direction and/or counter to the winding direction.

The second toothing means (of the second fastener part) may in this case be arranged on the actuating element or on the winding element. A positively locking hold in the closed position can thus be produced between the actuating element and the first fastener part or between the winding element and the first fastener part.

By means of the toothing means, it is possible in particular to provide a type of freewheel which permits a rotation of the second fastener part relative to the first fastener part in the winding direction when the fastener parts have been mounted on one another and are thus situated in the closed position, but locks a movement counter to the winding direction. In the event of rotation of the winding element relative to the first fastener part, the second toothing means of the second fastener part slides over the first toothing means of the first fastener part, such that a ratchet movement of the second fastener part relative to the first fastener part in the winding direction is possible. In the event of load being exerted counter to the winding direction, toothing elements of the toothing means however engage with one another such that a movement is locked and the second fastener part and thus also the winding element are held in their presently assumed position.

The toothing means may for example be in engagement with one another in an axial direction. In the event of a rotation of the second fastener part in the winding direction relative to the first fastener part, the toothing means slide over one another, for example by virtue of sawtooth-like toothing elements sliding on one another. If the first fastener part and the second fastener part are mounted so as to be rotatable relative to one another and are guided axially on one another, this may be associated with a (small) axial movement of the second fastener part relative to the first fastener part.

Provision may alternatively be made for at least one of the toothing means to have at least one toothing element which, in the event of rotation of the second fastener part in the winding direction, can be forced aside, for example transversely with respect to the winding direction. In this case, it is thus the case that no axial movement occurs between the fastener parts, but rather the toothing elements of one of the toothing means are forced aside if the second fastener part is rotated in the winding direction relative to the first fastener part. This may be expedient in particular if the first fastener part and the second fastener part are, in the closed position, mechanically detained together and thus cannot be moved axially relative to one another.

It is basically possible for all types of technically known free wheels to be used.

In one embodiment, the first fastener part has a cylinder portion which, in the closed position, engages into an opening of the winding element for the rotatable mounting of the winding element on the first fastener part. The first toothing means of the first fastener part may extend circumferentially around the surface portion. In this case, by means of the cylinder portion, a rotatable mounting of the second fastener part, in particular of the winding element of the second fastener part, on the first fastener part is realized, such that the second fastener part can, by actuation of the actuating element, be easily rotated for example in order to wind up the tension element onto the winding element, with the toothing means of the first fastener part and of the second fastener part sliding over one another.

A fastener device of the type described here may be designed as a purely mechanical fastener device, in the case of which the fastener parts are mounted on one another and are mechanically held against one another in the closed position. By means of such mechanical hold, it is possible here for shear forces in a plane transverse with respect to the closing direction to be accommodated, and additionally possibly also forces counter to the closing direction in the case of a mechanical detent connection between the fastener parts.

In one advantageous embodiment, the fastener device is of magnetic design. For this purpose, the first fastener part and the second fastener part each have at least one magnet element which, during the mounting of the fastener parts on one another, are situated opposite one another with magnetically attractive action in order to close the fastener device and thus magnetically assist the closing of the fastener device.

Here, a magnet element may be formed by a permanent magnet or else by a magnetic armature, composed for example of a ferromagnetic material. For example, one of the fastener parts may have a permanent magnet which interacts, with magnetically attractive action, with a magnetic armature of the other fastener part. It is however also conceivable for both fastener parts to each have a permanent magnet, or else an arrangement of multiple permanent magnets, which, during the mounting of the fastener parts on one another, are situated with opposite poles opposite one another and thus assist the mounting process by magnetic attraction.

By means of magnet elements which act with a magnetically attractive action between the first fastener part and the second fastener part and which thus magnetically assist the mounting of the fastener parts on one another, it is possible in particular for the toothing means of the fastener parts to be pulled into engagement with one another such that, in the closed position, there is engagement between the toothing means. By means of the magnet elements, it can furthermore also be realized that the engagement means of the actuating element and of the winding element are in engagement with one another in the closed position.

For example, on the actuating element, there may be arranged a magnet element which interacts with an associated magnet element on the first fastener part during the closing of the fastener device. Owing to the magnetic attraction force, it is also possible, in the closed position, for the engagement between the engagement means of the actuating element and of the winding element to be produced by virtue of the actuating element being pulled toward the winding element owing to the magnetic action on the actuating element.

If there is a spring preload between the actuating element and the winding element in the direction of the release position of the engagement means, then the magnetic attraction force in the closed position preferably exceeds the preloading spring force, such that the engagement between the engagement means of the actuating element and of the winding element can be produced owing to the magnetic attraction force.

The first fastener part and the second fastener part may, in one embodiment, in the closed position, be mechanically detained together in order to hold the fastener parts against one another counter to the closing direction, in a magnetic or non-magnetic embodiment of the fastener device. For this purpose, one of the fastener parts may for example have a detent means with at least one movable detent element which, in a detained position, engages into a detent recess of the other fastener part and thus holds the fastener parts against one another counter to the closing direction. By the detent means, a mechanical detent connection is thus produced between the fastener parts when the fastener parts have been mounted on one another. By the detent means, the fastener parts are held on one another counter to a load directed oppositely to the closing direction, such that a removal of the fastener parts from one another is not possible without releasing the detent connection.

The detent means preferably moves automatically into the detained position during the mounting of the fastener parts on one another. During the mounting of the fastener parts on one another, the fastener parts are thus automatically detained together, such that the hold of the fastener parts against one another in the closed position is safeguarded. Here, the second fastener part may possibly be rotatable relative to the first fastener part in the winding direction despite the detent connection, such that the tension element can be wound up onto the winding element when the fastener parts have been mounted on one another.

The detent means may have one or more detent elements. These are for example spring-preloaded in the direction of their detained position, such that the detent elements preferably automatically engage with the associated detent recess of the other fastener part when the fastener parts are mounted on one another.

In one embodiment, the detent means has an engagement element which, in the closed position, engages into the other fastener part and on which the at least one detent element is arranged. If the detent means is arranged for example on the second fastener part, then the engagement element, in the closed position, engages into an associated opening for example in a cylinder portion, which serves for the mounting of the winding element, of the first fastener part. One or more detent elements are arranged on the engagement element, such that the detent engagement between the fastener parts in the closed position is produced by means of the engagement element.

In one embodiment, if the detent means is formed on the second fastener part, the engagement element is adjustable axially along the closing direction relative to the actuating element. The actuating element can thus be axially adjusted relative to the engagement element over a certain travel, which makes it possible in particular for the second fastener part, in the event of rotation relative to the first fastener part and in the event of the toothing means sliding over one another, to perform a compensating axial relative movement relative to the first fastener part, with detent engagement between the second fastener part and the first fastener part.

Here, the engagement element is preferably spring-preloaded relative to the actuating element, for example by means of a compression spring, which forces the actuating element and thus also the winding element in the direction of the first fastener part when the fastener device is in the closed position.

In order to be able to release the detent connection between the fastener parts and separate the fastener parts from one another in order to open the fastener device, the detent means preferably has an operating element which can be actuated in order to disengage the at least one detent element from the detent recess. For example, a user can push on the operating element, which is for example arranged at just on the engagement element, in order to thereby move, or at least release, the detent elements arranged on the engagement element, such that the detent engagement of the detent means can be released.

The operating element is for example guided axially along the closing direction on the engagement element. The engagement element may for example be designed as a sleeve within which the operating element is received so as to be displaceable axially along the closing direction.

In one embodiment, it is also possible for a gearing, for example a planetary gearing, to be provided between the actuating element and the winding element, such that an introduction a force from the actuating element into the winding element takes place via a gearing and thus with a speed reduction or with a speed increase.

The actuation of the actuating element may be performed manually by rotating the actuating element. Embodiments are however also conceivable and possible in which an electric motor is provided for driving the actuating element. Such an electric motor may for example be arranged positionally fixedly on an assembly connected to the first fastener part, and may for example engage by means of a suitable gearing element, for example a drive worm, with a toothing of the actuating element when the fastener device is situated in its closed position. The actuating element can thus be rotated by means of the electric motor.

It is alternatively conceivable and possible for the toothing means of the first fastener part to be driven by electric motor means in order to rotate the winding element by rotation of the toothing means of the first fastener part.

In one embodiment, in each case one or more electrical contact elements may be arranged on the first fastener part and on the second fastener part such that electrical contact is produced between the fastener parts during the closing of the fastener device.

In a further embodiment, the fastener device may have a winder exit element, for example in the form of an eyelet, which may be arranged on the second fastener part and designed as a component which is additional to the winding element and to the actuating element. The winder exit element may for example be freely rotatable relative to the winding element and/or the actuating element and guides the tension element in relation to the winding element, such that the tension element runs into the winding element in a defined manner. This prevents uncontrolled unwinding of the tension element from the winding element and in particular knotting of the tension element during the unwinding process.

The fastener device described here permits a releasable connection of fastener parts in combination with a tightening facility for a tension element. This makes it possible, for example, for the tension element to be preloaded under tension with the fastener parts separated in order for the fastener device to then be closed and, in the closed position of the fastener device, for the tension element to be wound up and retightened by rotation of the winding element. For example, in the case of a shoe, it is possible in this way for the tension element (in the form of a shoelace) to be manually pre-tightened by pulling on the tension element with the fastener device separated and then retightened with the fastener device closed.

Furthermore, the separation of the fastener parts makes it possible for the tension element connected to the winding element to be laid around an article in order for one assembly to be fixed to another by means of the fastener device. For example, with the fastener device open, the tension element can be laid around for example a mast or a frame, for example a bicycle frame, in order for the fastener device to then be closed and the tension element tightened, such that an assembly can be fixed to the mast or to the frame in this way.

A fastener device of the type described here may be used in a wide variety of ways. For example, a fastener device of the type described here may be used on bags or other containers such as rucksacks, boxes or containers, on shoes (in particular sports shoes such as walking shoes, ski boots or the like), on helmets, in particular sports helmets, or on medical aids such as for example medical support splints or the like.

For example, by means of a fastener device of the type described here, it is possible for straps on sacks or bags to be tightened (so-called compression straps). A strap or a hip strap of a rucksack or school satchel can be closed and tightened by means of such a fastener device. Also, such a fastener device may be used on a cable drum for winding up an electrical cable, for example a headphone or charging cable.

In the case of a helmet, it is possible by means of a fastener device of the type described here for a strap to be tightened or for an article to be secured on the helmet, for example protective goggles (such as ski goggles) or the like.

A fastener device of said type may also serve for the stowage and securing of accessories or bags in or on vehicles (bicycles, passenger motor vehicles, heavy goods vehicles, ships, aircraft etc.), for example as a tightening device on a bicycle luggage carrier.

Specifically, a fastener device of said type may for example be used on a holder, which can be tightened around a bicycle frame, for the purposes of fixing an assembly, for example a drinking bottle or a container, to the bicycle frame.

Furthermore, a fastener device of said type may be used for tensioning tarpaulins and sheets of any type, for example for tensioning tent tarpaulins or for tensioning a sunblind.

Military applications are also conceivable and possible. Accordingly, a fastener device may be used for the tensioning and stowage of weapons and munitions.

A fastener device of the described type may also be used in a tourniquet ligature system for ligating heavily bleeding wounds on a patient.

DESCRIPTION OF THE INVENTION

FIGS. 1A, 1B to 5A-5Cshow an exemplary embodiment of a fastener device1in which fastener parts2,3can be mounted on one another along a closing direction X and are held against one another in a closed position.

As can be seen from the exploded views as perFIGS. 2A and 2B, the first fastener part2has a main body20on which a cylinder portion201is formed. Running in encircling fashion around the cylinder portion201is a toothing25, the teeth of which have a sawtooth-like form. A magnet element23is also arranged on the main body20.

The second fastener part3has an actuating element34in the form of a handgrip and a winding element35which forms a channel353which is axially delimited by annular collars352,354and in which a tension element4can be received in order to be wound up on the winding element35. On the actuating element34, there is secured a magnet element33which interacts with magnetically attractive action with the magnet elements23on the first fastener part2.

On a side facing toward the first fastener part2, a toothing351is formed on the winding element35. During the mounting of the fastener parts2,3on one another, said toothing351of the winding element35engages with the toothing25on the main body20of the first fastener part2, as illustrated inFIGS. 3A-3F.

When the fastener parts2,3have been mounted on one another, it is the case that the cylinder portion201engages into a central opening350of the winding element35such that, by means thereof, the winding element35is mounted rotatably and in axially movable fashion on the first fastener part2.

Both the toothing351of the winding element35and the toothing25of the first fastener part2have a sawtooth-like form. This makes it possible, in the closed position of the fastener device1, for the second fastener part3with the winding element35and the actuating element34to be rotated in a winding direction V relative to the first fastener part2, wherein, the teeth of the toothings25,351slide on one another and can be moved over one another, with the fastener parts2,3being axially deflected relative to one another. The toothings25,351thus provide a type of freewheel which, when the fastener parts2,3have been mounted on one another, permits a rotation of the winding element35in the winding direction V, in order for a tension element4arranged on the winding element35to be tightened, but locks a movement counter to the winding direction V, such that the tension element4cannot be unwound counter to the winding direction V with the fastener parts2,3mounted on one another.

As can be seen for example fromFIGS. 3E and 3F, the teeth of the toothings25,351each form an undercut which has the effect that, when the fastener parts2,3are under load, the toothings25,351are in engagement with one another with locking action counter to the winding direction V, and thus a rotational movement of the winding element35counter to the winding direction V relative to the first fastener part2is prevented. The engagement is rotationally conjoint, load-bearing and self-intensifying, owing to the undercut tooth flanks, which interact when load acts counter to the winding direction V, of the toothings25,351.

The winding element35is mounted rotatably on the actuating element34and, for this purpose, is held on the actuating element34rotatably, and so as to be axially displaceable along the closing direction X by a displacement travel, by means of holding elements342which engage over the annular collar354and which project inward from a base surface340of the actuating element34. The holding elements342engage around the annular collar354and thereby produce a connection between the winding element35and the actuating element34.

The actuating element34and the winding element35are furthermore couplable by engagement means345,355such that the winding element35is, irrespective of position, movable together with the actuating element34or independently of the actuating element34. A first engagement means345is in this case formed in the base surface340in the form of openings lined up in a row circumferentially around the closing direction X, which openings can be placed in operative connection with a second engagement means355, which is formed on the annular collar354and which projects axially from the annular collar354, in order to thereby couple the actuating element34to the winding element35for transmission of force in the winding direction V.

On the actuating element34, there is arranged a cover element32which closes off the actuating element34at a side averted from the winding element35and, for this purpose, engages with detent action with the actuating element34.

The actuating element34encloses, by means of a circumferential sidewall344, a receiving space within which the winding element35is received, and held in an axially displaceable fashion, by means of its annular collar354. Here, a cylinder projection341projects centrally from the base surface340, which cylinder projection engages into the central opening350of the winding element35and thereby serves for the mounting of the actuating element34and the winding element35on one another rotatably about the closing direction X.

During the mounting of the fastener parts2,3on one another, owing to magnetically attractive interaction of the Magna elements23,33, the toothing351on the inner side of the opening350of the winding element35engages with the toothing25around the cylinder portion201, which furthermore engages with the opening350of the winding element35, as illustrated inFIGS. 3A to 3F. Because, owing to the magnetic attraction force between the Magna elements23,33, the actuating element34is furthermore pulled toward the cylinder portion201of the body20of the first fastener part2and is thus moved with its base surface340closer to the annular collar354of the winding element35, the engagement means345,355of the actuating element34and of the winding element35engage with one another, such that the actuating element34and the winding element35enter into a functional operative connection with one another as illustrated in the sectional views inFIGS. 3D to 3F.

Owing to the operative connection between the actuating element34and the winding element35in the closed position, in the event of a rotation of the actuating element34in the winding direction V, the winding element35is moved together with the actuating element34and is thus rotated about the closing direction X, because actuating force is transmitted to the winding element35by means of the engagement of the engagement means345,355. Here, the toothings25,351slide over one another, such that the winding element35is rotated relative to the first fastener part2and a tension element4is thus wound up onto the winding element35.

Owing to the sawtooth-like, undercut form of the toothings25,351, a load introduced by the tension element4counter to the winding direction V cannot lead to the winding element35turning back. This is prevented by means of the engagement of the toothings25,351into one another.

As can be seen in particular from the sectional views as perFIGS. 3E to 3F, the engagement means355of the winding element35is of sawtooth-like form, with sawtooth-like teeth with an oblique tooth flank and with an approximately vertical tooth flank. This sawtooth-like toothing355engages, in the engagement position, into the openings, which form the engagement means345, in the base surface340of the actuating element34, wherein this engagement is such that actuating forces in the winding direction V are introduced from the actuating element34into the winding element35, and the winding element35is thus moved together with the actuating element34in the winding direction V, but, in the event of rotation of the actuating element34counter to the winding direction V, the engagement means345,355can slide over one another and thus permit a relative movement of the actuating element34counter to the winding direction V relative to the winding element35.

If the fastener parts2,3are to be released from one another, then the second fastener part3can be simply pulled off from the first fastener part2counter to the closing direction X in a release direction L, as illustrated inFIGS. 4A to 4F, whereby the toothings25,351disengage from one another and the fastener parts2,3are separated from one another.

Because the magnetic attraction between the magnet elements23,33is in this case eliminated, the engagement means345,355disengage from one another, such that the winding element35can be rotated independently of the actuating element34. This makes it possible, for example, for a tension element4arranged on the winding element35to be freely unwound with the fastener device1open.

Provision may be made whereby the engagement means345,355of the actuating element34and of the winding element35disengage during the opening of the fastening device1for example owing to the action of gravitational force. However, in one advantageous embodiment, the actuating element34, as illustrated inFIGS. 5A to 5C, by means of spring elements343which are arranged at the inner side of the base surface340and which in the example embodiment illustrated are formed by integrally formed spring projections, is spring-preloaded relative to the winding element35in the direction of the release position, in which the engagement means345,355are not in engagement with one another, such that the actuating element34and the winding element35automatically and reliably disengage from one another during the opening of the fastener device1, and thus the winding element35can be rotated independently of the actuating element34with the fastener device1open.

FIGS. 6A, 6B to 10A-10Dshow another exemplary embodiment which, with regard to the toothings25,351that act between the first fastener part2and the winding element35and with regard to the engagement means345,355that act between the winding element35and the actuating element34of the second fastener part3, is of identical design to the exemplary embodiment described above on the basis ofFIGS. 1A, 1B to 5A-5F, such that, in this regard, reference is made to the explanations above.

In addition, the exemplary embodiment as perFIGS. 6A, 6B to 10A-10Dhas a detent means36which is arranged on the second fastener part3and which serves for detaining the fastener parts2,3together in the closed position such that the second fastener part3is held with detent action and thus positively locking action on the first fastener part2counter to the closing direction X.

The use of a detent means36of said type permits a non-magnetic form of the fastener device1. It is thus basically possible for magnet elements to be omitted in the fastener device1. It is however also conceivable and possible for magnet elements, as are present in the exemplary embodiment as perFIGS. 1A, 1B to 5A-5Fto also be used in addition to the detent means36.

The detent means36has an engagement element38which—as can be seen fromFIG. 6Bviewed together withFIG. 7D—is received with an annular collar381in axially movable fashion in a receiving space322within the cover element32mounted on the actuating element34and which is spring-preloaded relative to the base surface340of the actuating element34by means of a spring element384in the form of a spiral spring. On a cylindrical body380which extends from the annular collar381, receiving openings382are formed diametrically opposite one another, in which receiving openings there are received detent elements385in the form of balls which serve for engaging, in the closed position of the fastener device1(FIGS. 7A to 7D), with detent action into a detent recess202in the form of an annular groove running in encircling fashion on the inner side of an opening200of the cylinder portion201of the first fastener part2, such that, by means thereof, as can be seen fromFIG. 7D, there is detent engagement between the engagement element38, which in the closed position engages into the opening200of the cylinder portion201, and the cylinder portion201, and, by means thereof, the fastener parts2,3are detained together.

Within a central opening383of the engagement element38, an operating element37is guided axially along the closing direction X. The operating element37has a cylindrical design, is supported elastically on the first fastener part2in the closed position by means of a spring element374situated in an opening373in the form of a blind bore, and is furthermore in contact, by means of an annular collar371at an end side, in a travel-limiting manner with the engagement element38when said operating element not actuated relative to the engagement element38.

As can be seen fromFIGS. 6A, 6Bviewed together withFIG. 7D, the operating element37has, on its outer circumferential surface, two diametrically oppositely situated unlocking openings372, which, in the closed position, are arranged at an axially different height in relation to the detent elements385, as can be seen fromFIG. 7D, such that the detent elements385are in contact with the outer circumferential surface of the cylindrical body370of the operating element37and, by means thereof, are held in detent engagement with the detent recess202on the inner side of the cylinder portion201.

In the closed position (FIG. 7A to 7D), the actuating element34is, owing to the spring preload of the spring element384, pushed in the direction of the first fastener part2and, owing to contact of the base surface240against the annular collar354of the winding element35, the winding element35is pushed into engagement with the toothing25of the first fastener part2, as can be seen fromFIG. 7D. In the closed position, the second fastener part3is thus held with detent action on the first fastener part2, with existing engagement between the engagement means345,355of the actuating element34and of the winding element35and additionally with toothing engagement between the winding element35and the first fastener part2.

If, in the closed position of the fastener device1, the actuating element34and thus, owing to the engagement of the engagement means345,355, the winding element35together with the actuating element34are rotated in the winding direction V, the toothings25,351slide over one another, which causes a (small) axial movement of the winding element35and, by means thereof, of the actuating element34, as is illustrated inFIGS. 8A-8D. Here, because the engagement element38of the detent means36is held axially fixed relative to the cylinder portion201of the first fastener part2by means of the detent elements385, the axial deflection of the winding element35and of the actuating element34takes place counter to the spring preload of the spring element384, as is illustrated inFIG. 8D.

After rotation of the actuating element34and of the winding element35, the toothings25,351then engage with one another again owing to the spring preload of the spring element384, with abutment of the annular collar352against the body20of the first fastener part2(correspondingly to the position as perFIGS. 7A to 7D).

For the release of the fastener parts2,3from one another, a user can push the operating element37into the engagement element38in an actuating direction D, as illustrated inFIGS. 9A to 9D. In this way, the body370of the operating element37is adjusted axially along the closing direction X within the engagement element38, such that the unlocking openings372move to the same axial height as the detent elements385, and the detent elements385can thus deflect radially inward, as is illustrated inFIG. 9D. In this way, the locking detent engagement between the engagement element38and the cylinder portion201is eliminated, such that the fastener parts2,3can be removed from one another counter to the closing direction X, i.e. in the release direction L.

FIGS. 10A to 10Dshow the fastener device1in its open position. In the opened position, the fastener parts2,3are separated from one another, wherein, owing to the action of gravitational force or else owing to a spring preload, the actuating element34and the winding element35with their engagement means345,355are disengaged, such that the winding element35can be rotated independently of the actuating element34, and therefore a tension element arranged on the winding element35can possibly be unwound.

For the closing of the fastener device1again, the second fastener part3can be mounted onto the first fastener part2again in the closing direction X, whereby the engagement element38engages with the opening200of the cylinder portion201and the detent elements385engage with detent action into the detent recess202in the form of the encircling groove within the cylinder portion201. In this way, the toothings25,351also enter into toothing engagement with one another, and the fastener device1assumes the closed position illustrated inFIG. 7A to 7D.

FIGS. 11A to 11Eshow to exemplary embodiments which are modified in relation to the exemplary embodiment as perFIGS. 6A, 6B to 10A-10D, which are on the one hand of magnetic design and are on the other hand of non-magnetic design.

Viewed externally, the two exemplary embodiments are similar (seeFIGS. 11A to 11C), but differ (slightly) in terms of their internal design, as can be seen from the views as perFIGS. 11D and 11E.

In both exemplary embodiments, the detent means36has an engagement element38on which there is formed a continuous bore387which extends transversely with respect to the closing direction X and in which two spherical detent elements385are arranged and preloaded relative to one another by means of a spring element386. When the fastener parts2,3are mounted on one another, the engagement element38engages with the cylinder portion201, and the detent elements385engage with detent action with the detent recess202on the inner side of the opening200of the cylinder portion201, as can be seen fromFIGS. 11D and 11E.

Here, the detent engagement is maintained in the closed position owing to the spring preload by means of the spring element386. If it is intended to release the detent engagement, then the second fastener part3can, with sufficient exertion of force, be pulled off the first fastener part2counter to the closing direction X, whereby the detent elements385are automatically, by running onto the upper edge of the groove-like detent recess202, offset radially inward and thus disengaged from the detent recess202. The detent engagement between the fastener parts2,3can thus be released without separate actuation of the engagement element38.

While the exemplary embodiment as perFIG. 11Dis of purely mechanical form, the modified exemplary embodiment as perFIG. 11Eis of magnetic form by virtue of the fact that a magnet element23is arranged on the body20of the first fastener part2and, furthermore, a magnet element33is arranged on the body380of the engagement element38, as can be seen from the sectional view as perFIG. 11E. The fastener parts2,3thus (also) magnetically interact, which facilitates the mounting of the fastener parts2,3.

Moreover, the exemplary embodiments as perFIGS. 11D and 11Eare functionally identical to the previously described exemplary embodiments, so that reference may be made to that which has been stated above in this regard.

In the exemplary embodiments described above, the toothing means25,351on the first fastener part2and on the second fastener part3may basically be designed very differently in order, in the closed position, to produce positive locking hold (which can withstand load at least up to a certain threshold torque) between the fastener parts2,3.

In the exemplary embodiment as perFIGS. 1A, 1B to 5A-5C, the toothing means25,351are formed with undercuts such that a movement of the winding element35counter to the winding direction V in the closed position is locked. This is however to be understood merely as an example, and may basically also be configured differently, as will be discussed below on the basis ofFIGS. 12A, 12B to 16A, 16B.

FIGS. 12A, 12B to 16A, 16Bshow different embodiments of toothing means25,351which differ in terms of the geometry of their teeth and which can be used in a fastener device1of the type described here.

Accordingly, in the exemplary embodiment as perFIGS. 12A, 12B, the teeth of each toothing means25,351have a tooth flank which extends obliquely relative to the closing direction X and which is in the form of a run-on bevel250, and an approximately vertically extending tooth flank251with a projection element252which is formed on said tooth flank and which projects along the winding direction V. In the event of a load acting in a loading direction B opposite to the winding direction V, the projection elements252of the teeth of the toothing means25,351engage with one another, such that a movement of the toothing means25,351in the loading direction B (counter to the winding direction V) is blocked. The winding element35thus cannot be rotated in the loading direction B counter to the winding direction V relative to the first fastener part2when the fastener device1is situated in its closed position.

In the exemplary embodiment as perFIGS. 12A, 12B, a detent lug253is additionally formed on the projection element252of each tooth (or at least some of the teeth) of the toothing means351, which detent lug can for example engage with detent action with an associated detent hollow on the projection element252of an associated tooth of the toothing means25in order to additionally lock the locking engagement of the teeth of the toothing means25,351in the event of load acting in the loading direction B.

The exemplary embodiment as perFIGS. 13A, 13Bis identical to the exemplary embodiment as perFIGS. 12A, 12Baside from the fact that, in the exemplary embodiment as perFIGS. 13A, 13B, no detent lugs253as in the exemplary embodiment as perFIGS. 12A, 12Bare provided on the projection elements252of the teeth of the toothing means351.

In the exemplary embodiment as perFIGS. 14A, 14B, the toothing means25,351are in the form of sawtooth-like toothings. The teeth of the toothing means25,351in this case have in each case one tooth flank in the form of a run-on bevel250and one vertically extending tooth flank251. A loading of the toothing means25,351in a loading direction B opposite to the winding direction V is locked.

In an exemplary embodiment illustrated inFIGS. 15A, 15B, the teeth of the toothing means25,351are, in relation to the exemplary embodiment as perFIGS. 14A, 14B, undercut at the tooth flanks251, that is to say are inclined obliquely relative to the closing direction X. This corresponds to the exemplary embodiment as perFIGS. 1A, 1B to 5A-5C. In the event of the toothing devices25,351being subjected to load in a loading direction B opposite to the winding direction V, the toothing means25,351are locked relative to one another.

In the exemplary embodiments as perFIGS. 12A, 12B, 13A, 13B and 15A, 15B, the engagement of the toothing means25,351is self-boosting in the event of load acting in the loading direction B. The fastener parts2,3are thus pulled toward one another in the closing direction X under the action of load. Owing to the positive locking by means of the projection elements252or owing to the undercut, the fastener device1is furthermore also locked against opening counter to the closing direction X. It is in particular also possible for loading forces which act not purely tangentially, but rather with a component counter to the closing direction X, to be accommodated and dissipated.

In the exemplary embodiment as perFIGS. 16A, 16B, the teeth of the toothing means25,351are inclined obliquely at both tooth flanks250,251such that they form a run-on bevel and, when a sufficient force acts between the toothing means25,351, the toothing means25,351can slide over one another in the winding direction V and also counter to the winding direction V, with the toothing means25,351axially deflecting relative to one another. In the exemplary embodiment as perFIGS. 16A, 16B, the toothing means25,351are thus not locked relative to one another either in the winding direction V or counter to the winding direction V, but rather can slide over one another in the manner of a ratchet if the torque acting between the toothing means25,351is sufficiently high.

In an exemplary embodiment illustrated inFIGS. 17A-17D, the teeth of the toothing means25,351extend, at their tooth backs, as in the case of a conical gearwheel, obliquely relative to the winding direction V and also relative to the closing direction X, which can increase the size of those surfaces of the teeth of the toothing means25,351which are in engagement with one another and supported on one another in the event of load acting counter to the winding direction V.

FIGS. 18 to 51show different exemplary embodiments of uses of a fastener device1which may be designed according to an exemplary embodiment of the type described above.

In the exemplary embodiment as perFIG. 18, the fastener device1serves for closing and tightening a shoe5. The fastener part3may, for this purpose, be mounted onto the fastener part2on a tongue of the shoe5in order to tighten a tension element4in the form of a shoelace.

FIG. 19shows another exemplary embodiment of a shoe5, which differs from the exemplary embodiment as perFIG. 18in terms of the winding of the tension element4in the form of the shoelace.

In the exemplary embodiment as perFIGS. 18 and 19, one end of the tension element4in the form of the shoelace is fixed to the fastener part3of the fastener device1and can be tightened by rotation of the actuating element34together with the winding element35relative to the fastener part2. The tightening is in this case also possible manually by virtue of the fastener part3being pulled, and the tension element4in the form of the shoelace thereby being tightened, before the fastener part3is fixed to the fastener part2.

In the exemplary embodiment as perFIGS. 20 and 21, two ends of the tension element4in the form of the shoelace, which in this case is wound as a loop, are connected to the fastener part3of the fastener device1, such that, by rotation of the fastener part3relative to the fastener part2, the tension element4in the form of the shoelace can be wound up with two ends and thus tightened. As illustrated inFIG. 21, before the fastener part3is arranged on the fastener part2, it is possible to perform manual tightening of the tension element4by pulling on the tension element4using a hand6.

In the exemplary embodiment as perFIG. 22, it is again the case that two ends of the tension element4in the form of the shoelace are connected to the fastener part3of the fastener device1and can thus be wound up, in order to close and tighten the shoe5, by rotating the fastener part3relative to the fastener part2. The tension element4in the form of the shoelace is in this case laid around tightening elements50, such that the shoe5can be tightened by winding the tension element4onto the winding element35of the fastener part3.

FIG. 23shows another exemplary embodiment, in which the tension element4has been laid around tightening elements50and is arranged with one end on the fastener part3of the fastener device1and can thus be tightened by means of the fastener device1.

In the exemplary embodiment as perFIG. 24, the tension element4in the form of the shoelace has (also) been laid around the sole51of the shoe5and connected by means of one end to the fastener part3of the fastener device1, such that the shoe5can be closed and tightened by means of the fastener device1.

In the exemplary embodiment illustrated inFIG. 25, the fastener device1serves for bracing a trouser leg52together with a shoe5by means of a tension element4in the form of a band. For this purpose, the tension element4extends around the trouser leg52and is fixed by means of the fastener device1to the shoe5, such that the trouser leg52can be braced relative to the shoe5by rotation of the fastener part3relative to the fastener part2.

Another exemplary embodiment is shown inFIG. 26. In this exemplary embodiment, a trouser leg52can again be braced relative to a shoe by virtue of the fact that a tension element4which extends through eyelets in the trouser leg52can be braced relative to the shoe5by means of the fastener device1.

It is also the case in the exemplary embodiment as perFIG. 27that a trouser leg52can be braced relative to a shoe, wherein, in this case, the tension element4extends in the form of a band around the sole51of the shoe5and can be braced on the shoe5by means of the fastener device1.

In the exemplary embodiment as perFIGS. 28 and 29, the fastener device1serves for closing and tightening an article of clothing5, for example a vest or a jacket. The tension element4in the form of a band or a cord is fixed at a fastening point53to the article of clothing5and can be laid around tightening elements50on both sides of an opening slot of the article of clothing5in order to thereby close the article of clothing5as illustrated inFIG. 29. By virtue of the fastener part3being arranged on the fastener part2and the fastener part3being rotated relative to the fastener part2, the article of clothing5can then be tightened.

It is also the case in the exemplary embodiment as perFIG. 30that the fastener device1serves for closing an article of clothing5, wherein, in this case, two fastener devices1are provided for tightening two tension elements4. The tension elements4are fixed in each case on one side of the opening slot of the article of clothing5at a fastening point53and can be tightened by virtue of the respective fastener part3being arranged on the associated fastener part2of the fastener device1on the other side of the opening slot of the article of clothing5.

In the exemplary embodiment as perFIGS. 31 and 32, the fastener device1serves for closing and tightening a medical aid5in the form of an ankle bandage on a foot7. By virtue of the fastener part3, which is connected to one end of the ankle bandage, being arranged on the fastener part2, which is connected to another end of the ankle bandage, and the tension element4extending on the ankle bandage being tightened, the ankle bandage can be closed and tightened.

FIGS. 33 and 34show another exemplary embodiment of a medical aid5in the form of an ankle bandage, in the case of which the tension element4, which is connected at one end to the fastener part2and at another end to the fastener part3, can be laid around a diverting means54, and, by mounting the fastener part3on the fastener part2, a loop of the tension element4is thus formed, which can be tightened by rotating the fastener part3relative to the fastener part2in order to close and tighten the ankle bandage.

FIG. 35shows an exemplary embodiment of a medical aid5in the form of an orthosis in the form of a neck brace, in the case of which the fastener device1serves for closing and tightening. A tension element4connected to the fastener part3can, proceeding from a fastening point53, be laid around tightening hooks50and tightened by rotation of the fastener part3relative to the fastener part2.

FIGS. 36 and 37show an exemplary embodiment of a helmet5, for example of a bicycle helmet, in the case of which the fastener device1serves for closing and tightening a belt55. The tension element4is a constituent part of the belt55and can be wound onto the fastener part3, specifically the winding element35of the fastener part3, in order to thereby tighten the belt55.

In the exemplary embodiment as perFIGS. 38 and 39, the fastener device1serves for tightening a chin strap56of a helmet5, for example of a bicycle helmet. The fastener part3of the fastener device1may in this case be arranged on the fastener part2and rotated relative to the fastener part2in order to thereby tighten the strap56.

In the exemplary embodiment as perFIG. 40, the fastener device1serves for adjusting the height of an assembly5in the form of a lamp. The tension element4serves in this case for hanging the lamp. By rotating the fastener part3of the fastener device1, the length of the tension element4can be varied, and thus the height of the lamp can be adjusted.

In the exemplary embodiment as perFIG. 41, the fastener device1serves for hanging an assembly5in the form of a picture. By rotating the fastener part3, the length of the tension element4can be changed, and thus the hanging of the picture can be adapted.

In the exemplary embodiment illustrated inFIGS. 42 to 44, the fastener device1serves for the electrical connection of an assembly in the form of a lamp5. For this purpose, the fastener part2is in the form of a plug. The fastener part3can be rotated relative to the fastener part2in the form of the plug in order to thereby change the freely extending length of the electrical cable that forms the tension element4.

In the exemplary embodiment as perFIG. 45, the fastener device1serves for tensioning an assembly5in the form of a roller blind. The fastener part3is connected by means of the tension element4to the roller blind. By virtue of the fastener part3being arranged on the fastener part2, which is arranged for example on a frame, and being rotated, the tension element4can be wound up and the roller blind thus adjusted.

In the exemplary embodiment as perFIG. 46, by contrast to the exemplary embodiment as perFIG. 45, two ends of the tension element4are connected to the fastener part3, such that, by rotation of the fastener part3, the two ends of the tension element4can be simultaneously wound up onto the winding element35of the fastener part3.

In an exemplary embodiment illustrated inFIG. 47, the fastener device1serves for tightening a tension element4in the form of a strap on an article of luggage.

In an exemplary embodiment illustrated inFIG. 48, the fastener device1serves for tightening a tension element4in the form of a band or a cord on an article of luggage in the form of a rucksack, in order to thereby secure articles to the article of luggage.

In an exemplary embodiment illustrated inFIG. 49, the fastener device1serves for securing an article5, for example a mobile telephone or the like, on a bicycle, in particular to a handlebar of a bicycle. The tension element4is in this case looped around the article5and can be tightened by being wound, in certain portions, onto the winding element35of the fastener part3.

FIG. 50shows another exemplary embodiment with different winding of the tension element4in order to secure an article5, for example a mobile telephone, on a bicycle.

In an exemplary embodiment illustrated inFIG. 51, the fastener device1serves for securing an article, for example an article of luggage, in a load compartment of a vehicle. Here, the tension element4is laid across the article of luggage and thereby holds the article of luggage positionally fixed on the floor of the load compartment. By means of the fastener device1, the tension element4can be tightened in order to secure the article of luggage.

FIGS. 52 to 56show a further exemplary embodiment of a fastener device1, in the case of which the fastener parts2,3can be mounted on one another along a closing direction X and are held against one another in a closed position.

In the exemplary embodiment as perFIGS. 52 to 56, the tension element4is in the form of a strap which can be wound up onto a winding element35in the form of a sleeve of the fastener part3. The fastener part3can be mounted onto the fastener part2, which has for example a buckle, such that, by means of the fastener device1, ends of the tension element4can be connected to one another and tightened relative to one another.

The fastener part3has an actuating element34with a hand lever formed integrally thereon, which hand lever can, by an engagement means345, be placed in engagement with an engagement means355of the winding element35, such that, by means of the actuating element34, the winding element35can be rotated in a winding direction V relative to the fastener part2.

As can be seen in particular from the sectional view inFIG. 56, the actuating element34has a peg346with an engagement opening347, by means of which the actuating element34can be mounted in the closing direction X onto a cylinder portion201on a body20of the fastener part2in order to connect the fastener parts2,3to one another.

For example owing to a spring preload between the actuating element34and the winding element35, the engagement means345,355are not in engagement with one another when the fastener parts2,3are separated from one another. The winding element35can thus be freely rotated relative to the actuating element34, such that the tension element4can for example be unwound from the winding element35. For closing, the fastener part3is mounted onto the fastener part3such that the engagement opening347on the peg346of the actuating element34engages with the cylinder portion201of the fastener part2, wherein the winding element35is supported on the body20of the fastener part2and, owing to magnetic attraction of magnet elements23,33on the cylinder portion201, on the one hand, and on the peg346of the actuating element34, on the other hand (seeFIG. 56), the actuating element34is pulled toward the winding element35and the engagement means345,355thus engage with one another in positively locking fashion. In this way, an operative connection is produced between the actuating element34and the winding element35, such that, when the fastener parts2,3have been connected to one another, the actuating element34and the winding element35can be jointly rotated in order to thereby wind the tension element4onto the winding element35and thereby tighten the tension element4.

At an end facing toward the body20, the winding element35has a toothing means351in the form of a sawtooth-like toothing which, when the fastener parts2,3have been connected to one another, engages with a toothing means25on the body20. The engagement of the toothing means25,351has the effect that the fastener parts2,3can be rotated relative to one another in the winding direction V, in order to tighten the tension element4on the winding element35, but not counter to the winding direction V.

To release the fastener device1, the fastener parts2,3can be pulled apart from one another counter to the closing direction X, such that the fastener parts2,3are thereby separated from one another.

FIGS. 57A and 57Bshow the fastener device1in the case of separated fastener parts2,3(FIG. 57A) and in the case of a closed fastener device1(FIG. 57B). The fastener device1may for example serve for tightening a strap in the form of a waistbelt.

FIG. 58shows a further exemplary embodiment of a fastener device1, in the case of which fastener parts2,3can be mounted on one another in a closing direction X, in a manner similar to that described above.

In the exemplary embodiment as perFIG. 58, a gearing26is provided on the fastener part2, which gearing may for example be in the form of a bevel gearing or worm gearing and serves for rotating the fastener part3relative to the fastener part2, in order to thereby tighten the tension element4, via the toothing means25(which, when the fastener parts2,3have been connected to one another, engages with the toothing means351of the fastener part3, as can be seen for example fromFIG. 52). In the exemplary embodiment as perFIG. 58, a rotation of the fastener parts2,3relative to one another is thus realized via a gearing provided on the fastener part2, which can for example be actuated manually.

FIGS. 59 to 62A, 62Bshow a further exemplary embodiment, in which precisely such a gearing26is implemented for the tightening of the winding element35.

In the exemplary embodiment as perFIGS. 59 to 62A, 62B, the gearing26is designed as a tightening gearing, in the case of which a tightening lever260is mounted, so as to be pivotable about a pivot axis265, on the body20of the fastener part2and is preloaded relative to the body20into a basic position (illustrated inFIGS. 62A, 62B) by means of a spring element261.

In the exemplary embodiment, the fastener part3may be mounted with a winding element35onto a cylinder portion201of the body20and, in a connected position, engages by a toothing means351with an associated toothing means25of the body20, as has also been described above. On the winding element35, there is formed a tightening engagement means356in the form of a toothing which runs around the winding element35and serves for interacting with the gearing26.

On the tightening lever260of the gearing26, an engagement lever262is arranged so as to be pivotable about a pivot axis263, which engagement lever serves for engaging into the tightening engagement means356of the winding element35.

For the mounting of the fastener parts2,3on one another, the tightening lever260can, as illustrated inFIGS. 61A, 61B, be deflected out of the basic position in a pivoting direction P1in order to thereby move the engagement lever262out of a region assumed by the winding element35when the fastener parts2,3have been connected to one another. The fastener parts2,3can thus be readily mounted on one another without being impeded by the gearing26.

If the tightening lever260is released again, the gearing26passes with its tightening lever260into the basic position as perFIGS. 62A, 62B, in which the engagement lever262engages with the tightening engagement means256.

If the tightening lever260is now deflected in a pivoting direction P2, then the engagement lever262is moved jointly and rotates the winding element35in the winding direction V, such that the tension element4is wound onto the winding element35. The tension element4is thus tightened.

Here, the tightening is performed in stepwise fashion. Owing to the spring element261and the spring preload provided by it, the tightening lever260is, after an actuation, automatically reset into the basic position, wherein the engagement lever262slides over the tightening engagement means356, with elastic deflection of the spring element264by means of which the engagement lever262is elastically preloaded relative to the tightening lever260. The tightening of the tension element4is thus performed in stepwise fashion by repeated actuation of the tightening lever260.

By means of the spring element264, a freewheel is also provided. The winding element35can also be rotated by hand in the winding direction V. Here, the engagement means262slides over the tightening engagement means356of the winding element35with elastic deflection of the spring element264.

The concept on which the solution is based is not restricted to the embodiments highlighted above, but may in principle also be realized in a fundamentally different form.

A fastener device of the type described here may be used in a very wide variety of applications. In the case of a fastening device of the described type, a tightening device is combined with fastener parts which are separable from one another, which permits a connection of assemblies with simultaneous tightening of the assemblies relative to one another.

LIST OF REFERENCE DESIGNATIONS