LACE-UP SHOE WITH QUICK-RELEASE DEVICE

Description

[0001] The present invention relates to a shoe with a lacing system comprising at least one shoelace, and a quick-tensioning device for tightening and holding the shoelace, which has a lace reel for winding and tightening the shoelace and a drive reel for driving the lace reel.

[0002] In order to make it easier to put on and take off shoes, and to ensure that the upper fits well when put on, lacing is often used. This lacing is assigned to a widening and / or opening section of the upper and can, for example, extend over a tongue of the shoe. If the shoe is a low shoe, for example, the lacing can extend in the instep area. If the shoe is a boot, for example, the lacing can extend in the shaft area and possibly also in the instep area. Regardless of the shoe type, two or more separate laces can be used in different lacing sections, for example with one lace for the instep lacing area and one lace for the shaft lacing area, whereby if necessary.two parallel lacings can also be provided, for example on an inside and an outside of a shaft or generally of the upper shoe.

[0003] To avoid the hassle of tying a shoelace bow, it is already known to use holding and / or clamping devices that can fix or hold the shoelace in a tight position. This also facilitates the precise adjustment of the lacing tension and the setting of the desired shoelace tension, which, as is well known, often unintentionally loosens or loosens when tying a bow if the shoelace cannot be held parallel to the tying of the bow.

[0004] Such holding and / or clamping devices are known in various designs. For example, the shoelace can be guided through a clamping sleeve, which, after tightening, is slid along the shoelace until the clamping sleeve rests against the last lacing eyelet, from which the shoelace is pulled out. Such clamping eyelets can include a spring-loaded cross slider that can reduce the opening of the clamping eyelet and clamp the shoelace there. Alternatively, clamping clips or other holding devices can be attached to the upper of the shoe, to which the shoelace is clamped once it is tightened.

[0005] The part of the lace that is pulled out during tightening, which extends beyond the holding and / or clamping device, must then be tucked away to avoid creating a tripping hazard. This can generally be accomplished by tying a bow, but this remains laborious and doesn't fully utilize the advantages of the holding and / or clamping devices.

[0006] In this respect, it has already been proposed to provide spring-loaded winding devices for the protruding part of the shoelace. For example, EP 14 21 867 B1 shows a lace-up shoe whose laces are wound around a ratchet drum that can be rotated in the tightening direction and locked in the opposite direction by means of locking pawls, so that the ratchet drum can hold the tightened shoelace in the tightened position. To loosen the lacing again, the ratchet drum's locking mechanism can be released, allowing the drum to also rotate in the loosening direction.In order to store the excess lace part, which is pulled off the ratchet drum when tightening, this previously known shoe is provided with a spring-loaded winding storage device, which is only attached to the loosely dangling, pulled-out section of the shoelace, but pulls this section of the shoelace in using spring tension and thus comes to lie in the area of ​​the upper shoe when the protruding section of the shoelace is pulled in.

[0007] The cord storage for the tensioning cord that is pulled out when tightening the lacing is relatively bulky in order to wind up the required length of cord. Especially for boots with relatively long lacing, the laces must have a relatively long working length, meaning they must have enough extra length to loosen the lacing in the shaft area sufficiently for comfortable entry and exit. This then, conversely, means that when tightening the lacing, the laces must be pulled and taut a considerable distance or length to achieve a good fit. The laces must therefore be pulled out accordingly far and wound onto the cord storage, which makes the cord storage bulky.

[0008] WO 2009 / 068503 A1 discloses a snowboard boot whose lacing can be tightened by means of a lace drum secured against accidental unwinding by a locking latch. A separate pull drum is provided to drive the lace drum. This pull drum has a freewheel opposite the lace drum and is pre-tensioned by a spring in the freewheel direction, allowing the pull cord to be pulled out repeatedly with a pumping motion to tighten the lacing. Between pumping motions, the spring return mechanism rewinds the pull cord.

[0009] A similar tensioning system for tightening the laces of a sports shoe is known from document US 2006 / 0021204 A1, in which case the pull rope reel, which can be actuated by a pull-out pull rope, is in drive connection with the lace reel via a spur gear.

[0010] Other tensioning systems, which, however, do not work with a retractable pull rope but with manually turned actuating wheels, are known from the documents EP 3 019 043 B1 and US 2019 / 174872 A1.

[0011] Based on this, the present invention is based on the object of creating an improved shoe of the aforementioned type that avoids the disadvantages of the prior art and advantageously develops them further. In particular, the aim is to create a lacing system that is easy to fix and allows for finely controlled tension, with a large or long adjustment range for the laces, without requiring bulky and visually disturbing mechanisms that require a lot of space.

[0012] According to the invention, the stated object is achieved by a shoe according to claim 1. Preferred embodiments of the invention are the subject of the dependent claims.

[0013] It is therefore proposed that the lace spool and the drive spool no longer be designed as a one-piece winch with two winding sections, but rather that they be separated from each other and arranged so that they can rotate relative to each other. According to the invention, a driver device with a freewheel in one direction of rotation is provided between the lace spool and the drive spool. This driver device transmits a rotation of the drive spool in one tensioning direction to the lace spool and allows the drive spool to rotate freely relative to the lace spool in the opposite direction of rotation.

[0014] Thanks to the aforementioned driver device and its freewheeling in one direction of rotation, the drive spool can be rotated back and forth like a ratchet in order to continuously twist the lace spool in the desired direction in the tensioning direction, thereby tightening the shoelace. When the drive spool is freely rotated back, the drive spool can, so to speak, catch or re-engage, so that a relatively large rotational travel of the lace spool can be achieved with only a limited travel of the drive spool. In contrast to the prior art, there is no need to pull or unplug a tensioning cable with a long travel to achieve a correspondingly long travel of the shoelace.

[0015] As the lace is tightened, the lace spool continues to rotate in the same direction—the tensioning direction—while the drive spool rotates intermittently back and forth with a pump-like motion. During the pumping phases, in which the drive spool is rotated back to gain further adjustment or tensioning travel, the lace spool can be held or secured against reversing to prevent the already achieved lace tension from being lost.

[0016] To operate the drive coil, a flexible tensioning device, for example in the form of a tensioning cable, a belt, or a chain, can be provided as the actuating means. This device can be wound around the drive coil so that pulling the tensioning device rotates the drive coil in the tensioning direction. When the drive coil is ratcheted back in the opposite direction, the tensioning device is wound back onto the drive coil, so that the tensioning device can then be pulled off again, allowing the drive coil to rotate in the tensioning direction.

[0017] Alternatively or additionally, other actuating means for rotationally driving the drive coil may also be provided, for example, an adjusting lever connected to the drive coil in a rotationally fixed manner, which protrudes outwards on the circumferential side and can be grasped and moved back and forth by a hand or fingers in order to rotate the drive coil back and forth in the manner mentioned or to actuate it intermittently in a rotationally rotating manner. For finer footwear that requires only a lower lacing tension, a manually accessible edge bar of the drive coil may also be provided with a knurling to allow the drive wheel to be rotated in the tensioning direction with the thumb or fingertip.

[0018] For bulkier footwear or shoes that require stronger lacing tension, such as ice skates or work boots, it is advantageous to use a pulling device such as a tensioning cable as the actuating means in order to be able to actuate the drive coil with sufficient force or torque.

[0019] The separate design of the drive spool and lace spool advantageously also allows for a modular design of the quick-release device and, accordingly, easy adaptability of the quick-release device to different shoe types that require different lacing tensions. In particular, the drive spool and / or the lace spool can be easily exchanged to achieve different drum diameter ratios and thus different force transmission ratios. In principle, the drive spool and the lace spool can have at least approximately the same drum diameter, so that the shoelace wound onto the lace spool, on the one hand, and the tensioning cable unwinding from the drive spool, on the other hand, have at least approximately the same lever arms, and thus the tensile force on the tensioning cable achieves an approximately equal tensile force on the shoelace.

[0020] Alternatively, a drive spool can be combined with a lace spool, which has a larger drum diameter than the lace spool, thus giving the tensioning cable a larger lever arm than the lace running onto the lace spool. Accordingly, a relatively high lace tension can be achieved with a relatively low tensioning cable tensile force.

[0021] Conversely, if a relatively quick tightening of the lacing is to be achieved, i.e. a long adjustment path of the shoelace with a short stroke of the tensioning cable, a drive spool with a smaller drum diameter than the lace spool can be selected.

[0022] In an advantageous development of the invention, the tensioning cable or traction mechanism can be provided with an upward actuation direction—when the shoe is on the ground—or can be pulled upwards away from the shoe to actuate the drive coil. For example, the aforementioned actuation direction of the tensioning cable or traction mechanism can be aligned approximately parallel to the shaft axis of a boot or shoe shaft and / or approximately parallel to the longitudinal axis of the shinbone when the shoe is worn.

[0023] Advantageously, an outlet opening or removal guide for the traction means can be provided on an upper side of the quick-release device, through which the traction means exits from the drive coil or is held ready on an upper side of the quick-release device, so that a section of the traction means lying ready or standing on the upper side and accessible can be easily grasped by one hand of the shoe wearer.

[0024] To achieve simple and rapid actuation, an advantageous development of the invention can provide an elastic retraction device that attempts to rotate the drive spool relative to the lace spool in the freewheeling direction. If the actuating means—for example, the tensioning cable—is released or slackened, the retraction device rotates the drive spool relative to the lace spool, whereby the advantageously provided tensioning cable can be wound around the drive spool, so that the quick-action clamping device is ready for another clamping stroke.

[0025] By means of such an elastic return device, the quick-release device can be easily actuated in a pump-like manner in several strokes by tightening and releasing the actuating means coupled to the drive coil in several strokes, whereby when the actuating means is tightened, the drive coil takes the lace coil along in the tensioning direction and when the actuating means is released, the return device turns the drive coil back relative to the lace coil.

[0026] Such an elastic return device can, for example, engage the drive coil on the one hand and the lace coil on the other, for example, be designed in the form of a spiral spring that is suspended on the drive coil on the one hand and on the lace coil on the other. Alternatively or additionally, the return device can also have a support point on a housing part in order to be able to rotate the drive coil back by supporting it on the housing or support part. For example, a spiral spring can be suspended or supported on the drive coil on the one hand and on the housing or support part on the other, so that the rotational movement in the freewheeling direction is generated by supporting it on the housing or support part.

[0027] To hold the lace in the tightened position and / or temporarily while re-engaging the drive spool, or to prevent accidental loosening, the lace spool is locked in the tensioned rotational position or secured against reversing in the direction of tension, so that the lace spool holds the taut lace in the taut position. Additionally, the taut lace running onto the lace spool can be held before or after the lace spool, blocked, or secured against reversing, allowing the drive spool to be easily reversed relative to the lace spool when the actuator is released or released.

[0028] For this purpose, a retaining device is assigned to the lace spool, which automatically blocks, fixes, or brakes the lace spool against the rotational tensioning direction and releases it in the rotational tensioning direction. Such a retaining device is advantageously designed like a backstop brake, which automatically blocks or brakes in the release direction and automatically releases or is free to move in the tensioning direction. The retrieval device has a backstop with free movement in the tensioning direction and a locking direction in the opposite direction of rotation.

[0029] In order to be able to hold even larger spool torques with favorable leverage ratios, the retaining device advantageously has a retaining wheel that can be coupled to the lace spool in a rotationally fixed manner and that has non-positive and / or positive retaining means in the region of its outer circumference, which can be brought into engagement with cooperating retaining means on a housing part surrounding the retaining wheel. For example, the aforementioned retaining wheel can have locking teeth arranged on its circumference, which can be brought into locking engagement with a locking toothing, for example on the inner circumference of a housing part. Alternatively, a locking toothing can also be provided on the outer circumference of the retaining wheel, into which one or more retaining teeth on the surrounding housing part can be brought into engagement.

[0030] Advantageously, the at least one retaining tooth can be elastically spring-mounted, for example on a spring arm, in order to automatically jump into the locking position and, on the other hand, to be able to slide over one or more locking projections when the lace spool is rotated in the tensioning direction.

[0031] Alternatively or in addition to retaining means acting on the lateral surface in the form of the aforementioned toothing or locking teeth, axially effective retaining means may also be provided. For example, a surrounding housing part could be provided with a toothing on the end face, and the aforementioned retaining wheel could have one or more retaining teeth on an opposite end face section, which can axially engage with the aforementioned retaining toothing. The reverse configuration, with an annular locking toothing on the retaining wheel and one or more locking teeth on the surrounding housing part, is also possible.

[0032] According to the invention, said retaining device is designed separately from the lace reel and can be coupled to the lace reel in a rotationally fixed manner. A releasable coupling is provided between said retaining device and the lace reel to allow the taut shoelace to be released by disengaging the lace reel from the retaining device.

[0033] Advantageously, an axially operable or axially movable coupling is provided between said retaining wheel and the lace spool. Such an axially operable coupling can be designed, for example, in the form of a claw coupling, which can comprise axially projecting and recessed coupling projections and recesses on said retaining wheel, on the one hand, and an end face of the lace spool, on the other. Alternatively or additionally, spur gears can also be provided on the retaining wheel and the lace spool as an axially operable coupling, which can be brought into and out of engagement by axially adjusting the lace spool and the retaining device relative to one another.

[0034] Alternatively or additionally, the retaining device can be released and the lace coil released in other ways. For example, the retaining device itself, possibly together with the lace coil, can be axially adjusted relative to a support or housing part to disengage the locking pawls and the associated locking contours, allowing the retaining device to rotate together with the lace coil.

[0035] Additionally, an axially adjustable decoupler, for example in the form of a wedge, could disengage and / or engage a spring-loaded latch arm to unlock or lock the retaining device. Such an actuator or decoupler could also have a different actuation direction, for example, be radially depressible to decouple or unlock and lock the retaining device.

[0036] By axially actuating the release or coupling, a relatively large-surface actuating element for unlocking or uncoupling can be provided without requiring a bulky design of the quick-release device. In particular, the actuating element can be mounted on the front side in front of the drive coil and / or the lace coil on an accessible front side of the quick-release device and, for example, can have a diameter substantially corresponding to the diameter of the lace coil and / or drive coil. At the same time, the actuating direction is approximately perpendicular to the surface of the upper shoe, in particular approximately perpendicular to the shinbone, making it intuitive for the user to operate or unlock the quick-release device.

[0037] Depending on the alignment or orientation of the lace and drive coils, it may also be advantageous to design the release mechanism to be actuated tangentially or transversely to the shoe upper or shin, for example to design it to be pressed in like a release button or to design it to be pullable or pivotable out like a latch.

[0038] In addition, the backstop can also comprise a retaining unit that acts directly on the shoelace, for example in the form of a rope or lace clamp that allows the shoelace to pass through in the tensioning direction but blocks it from moving back in the opposite direction. For example, such a retaining unit can comprise two clamping jaws that define a pull-through gap between them and can be provided with a tooth-like clamping profile on the flanks facing each other. The clamping jaws can be rigidly arranged or, alternatively, can be movable towards and away from each other, for example in conjunction with a pre-tensioning device that presses the clamping jaws towards each other. If the rope or lace running through the clamping jawsIf the passing lace is pulled in the tensioning direction, the movable clamping jaws can open, while in the opposite direction, the friction of the lace and / or the pre-tension compresses the clamping jaws, thereby securing the rope. For example, the clamping jaws can be pivoted, preferably around pivot axes offset toward the inlet side, so that self-clamping occurs when the rope tries to retract due to the tension.

[0039] Such a backstop acting on the shoelace itself can relieve the lace reel when the lacing is fully laced, but also during the pumping movements of the drive reel, since the lace reel itself and the retaining device associated with it do not have to absorb the entire lace tension.

[0040] Preferably, the release device for unlocking the retaining device, be it the backstop that prevents the lace spool from rotating backwards, or the backstop that acts directly on the lace, is designed to be axially actuated, i.e., actuation occurs approximately parallel to the rotational axis of the lace spool. For example, the release can have an actuating button that can be pressed in parallel to the rotational axis of the lace spool or pushed towards the shoe shaft or upper and / or pulled out in the opposite direction or pulled away from the shaft or upper to unlock the retaining device. Such an actuating button can also be actuated tangentially to the shoe shaft or upper, e.g., actuated horizontally in front of the instep or shin. Such an actuation direction transverse to the shin or transverse to the foot allows intuitive operation of the quick-release device.

[0041] The invention is explained in more detail below using a preferred embodiment and the accompanying drawings. In the drawings: Fig. 1: a front view of a lace-up shoe with a quick-release device according to an advantageous embodiment of the invention, wherein the partial view a shows the lacing in the still untensioned state, the partial view b shows the quick-release device during tensioning and the partial view c shows the return of the drive coil of the quick-release mechanism after releasing the tensioning cable, Fig. 2: a side view of the shoe from Fig. 1, where partial view a shows the shoe with the lacing still taut and partial view b shows the loosening of the lacing with the lace spool unlocked, Fig. 3: a perspective exploded view of the quick-tensioning device of the shoe from the previous figures, showing the lace spool and the drive spool as well as the retaining device provided in between, Fig. 4: a perspective view of the quick-tensioning device showing the directions of rotation of the two spools during tensioning, Fig. 5: a perspective view of the quick-tensioning device during the elastic retraction of the drive spool with the lace spool blocked, where partial view a shows both spools and their movement and partial view b shows the retaining device for blocking the retraction of the lace spool, Fig.6: a perspective view of the quick-release device with the lace reel unlocked for releasing the lacing, showing the movement of the unlocker and the lace reel for releasing the lacing, Fig. 7: a sectional view through the quick-release device from the previous figures, the partial view. Fig. 7a the lace coil in the engaged, drive-connected state for driving by the drive coil and the partial view 7b shows the lace coil in the disengaged, freely rotatable state relative to the drive coil, and Fig. 8: a perspective view of a quick-release device for a lace-up shoe similar Fig. 4 according to a further advantageous embodiment, in which, compared to the Figures 1 to 4 the lace and drive coils along with their axes of rotation are mounted on a support rotated by 90°, so that the axis of rotation of the coils extends tangentially to the shinbone or tangentially to a shoe upper.

[0042] As the figures show, the shoe 1 comprises an upper shoe 2 which is arranged on a sole 3 and has a lacing 4.

[0043] The lacing 4 can be assigned to an opening and / or widening section 5 of the upper shoe 2 and cover a tongue 6 located underneath, wherein the lacing 4 can extend back and forth from edge to edge of the opening and / or widening section 5 in order to be able to tighten and unlace the upper shoe 2 to a greater or lesser extent in the region of said opening and / or widening section 5.

[0044] Said lacing 4 can comprise a lacing section 4a, for example, in the area of ​​an instep zone of the upper shoe 2. If the shoe 1 is designed in the form of a boot with a shaft 7, the lacing 4 can also comprise a lacing section 4b in the area of ​​the shaft 2—alternatively or in addition to the lacing section 4a in the instep zone.

[0045] The lacing 4 can comprise a common lace 8 passing through all lacing sections 4a, 4b. Alternatively, different lacing sections 4a, 4b can also be laced with separate laces, as is the case, for example, Figure 1 according to which a first lace 8a laces the lacing section 4a in the instep zone and a second lace 8b laces the lacing section 4b on the shaft 2.

[0046] Depending on the shoe or upper shoe design, the lacing 4 can also run differently and include other lacing sections, whereby the shoelace 8 can be guided differently regardless of this.

[0047] As the figures show, a quick-tensioning device 9 is provided for tightening the lacing 4 and thus for narrowing the widening section 5, by means of which the lace(s) 8 of the lacing 4 can be tightened and also stowed away.

[0048] The quick-tensioning device 9 comprises a lace reel 10 onto which the lace(s) 8 can be wound and thus tensioned or tightened, cf. Fig. 3 and Fig. 4 The lace reel 10 can be designed like a cable drum and have a drum body defined at its axial end regions by two flanges to form a winding area for the shoelace(s) 8. The shoelace 8 can be attached or fastened to the drum body or to the side flanges, for example, threaded through a hole and secured by a knot. Alternatively, a sufficient wrapping with several winding turns may be sufficient to hold the shoelace on the lace reel 10.

[0049] The said lace spool 10 can be held or mounted on a support part 12 of the quick-release device 9 so as to be rotatable about a rotation axis 11, wherein the said rotation axis 11 can extend approximately perpendicular to the surface of the upper shoe 2, cf. Figure 1 , 3 and 4 . Preferably, the axis of rotation 11 can be aligned approximately perpendicular to a shaft section or to a shin section surrounded by it, cf. Figure 1 , 3 and 4 in order to be able to operate the quick-release device 9 by pulling a tensioning cable 13 upwards, as will be explained later.

[0050] Alternatively, the quick-release device with the mentioned axis of rotation 11 can also be aligned tangentially to the surface of the upper shoe 2, in particular tangentially in front of a shaft section or a shin section surrounded by it, that is to say in comparison to the mentioned Figure 1 , 3 and 4be positioned rotated by 90°. Such a rotated arrangement of the quick-release device 9 shows the Figure 8 , whereby in this case too, the said axis of rotation 11 can be arranged horizontally in order to be able to actuate the quick-release device 9 by pulling up the tensioning cable 13. Such a tangential orientation of the axis of rotation 9, as Figure 8 shows, advantageously allows the quick-release device or its coils to be mounted on both sides, in particular between the legs of a U-shaped support part 12, which can be attached, for example, to the shaft of the lace-up shoe, cf. Fig. 8 Such a two-sided mounting arrangement is lighter in construction and can support the rotating spools or their rotational axes more stably, since, unlike a cantilevered suspension, bending moments do not have to be absorbed on one side. Furthermore, unlocking the lace spool is easier, as will be explained below.

[0051] The quick-release device 9 can - regardless of a radial or tangential orientation of the rotation axis 11 - be attached, for example, to the tongue 6 of the shoe 1 in the region of an upper end of the lacing 4, although depending on the lacing 4, the quick-release device 9 can also be provided, for example, on an inside or outside of the shaft of the upper shoe 2.

[0052] In order to drive the lace spool 10 in rotation and thus tighten the shoelace 8, a drive spool 14 is provided, to which a traction means 15, separate from the shoelace 8, engages in order to rotate the drive spool 14. The traction means 15 can be designed to be flexible in order to be wound onto the drive spool 14. The drive spool 14 can also be designed in the manner of a cable drum or winch and have a substantially cylindrical drum body, which can be enclosed by flanged discs at its front end sections, cf. Fig. 3 .

[0053] Advantageously, the drive coil 14 can be arranged coaxially to the lace coil 10 and can be mounted on the support part 12 of the quick-action clamping device 9 so that it can rotate about the same or a separate rotational axis 11, so that the drive coil 14 and the lace coil 10 can be rotated about coaxial rotational axes or can be rotated together.

[0054] Said support part 12 can, for example, comprise a base plate that can be attached to the upper 2, for example the tongue 6, wherein a housing can be provided around the drive coil 14 and / or the lace coil 10, which can be connected to said base plate. Said housing 16 can surround or accommodate the two coils 10, 14, so that the two coils 10, 14 are closed or covered. Said housing 16 can have inlet and outlet openings 17 on its circumference, through which the lace(s) 8, on the one hand, and the tensioning cable 13, on the other hand, can run in and out when they are wound onto or unwound from the respective coil.

[0055] The inlet / outlet opening 17 for the tensioning cable 13 is advantageously provided on an upper side of the housing 16, so that the tensioning cable 13 can be pulled out upwards, in particular approximately along the shinbone or the shaft of the upper shoe, in order to tighten the lacing 4.

[0056] Between the drive coil 14 and the lace coil 10, a driver device 18 is provided, which has a freewheel in one direction of rotation and drives the lace coil 10 in the other direction of rotation. In other words: If the drive coil 14 is actuated to rotate in the tensioning direction 19 by pulling on the tensioning cable 13, see. Fig. 4 , the drive coil 14 takes the lace coil 10 with it, so that the lace coil 10 also rotates in the mentioned tensioning direction 19, cf. Fig. 4 . This winds the shoelace 8 onto the lace reel 10 and tightens it.

[0057] The said driver device 18 can be designed in the manner of a ratchet mechanism or latching pawl mechanism and / or have a driver clutch which transmits torque in one direction of rotation and transmits no torque or no appreciable torque in the opposite direction of rotation.

[0058] How Fig. 3 shows, the driver device 18 can have, for example, tooth-shaped or wedge-shaped driver pawls 20, which can project from the front side of the drive coil 14 towards the lace coil 10 in order to engage or snap into driver depressions 21 which are complementary or cooperating therewith and which are connected to the lace coil 10 or arranged thereon in a rotationally fixed manner.

[0059] The said one or more driving pawls 20 and the driving recesses 21 cooperating therewith can have a sawtooth-like profile in order to lock together in the manner of a ratchet in one direction of rotation or to support each other in a rotationally fixed manner, and to slide over each other in the opposite direction of rotation.

[0060] In the drawn version according to Fig. 3 Three such driving pawls 20 are provided, although only one or two driving pawls 20 or more than three, for example, five or ten, may be provided. In particular, an annular sawtooth profile may also be provided, which can engage in an annular sawtooth groove.

[0061] The driver pawls 20 can be provided on the drive coil 14 or on the lace coil 10 or on the retaining element 21 to be described later, wherein the driver pawls 20 can be mounted for axial movement, in particular elastically preloaded. Alternatively, the driver pawls 20 and the associated driver recesses 21 can also be rigidly provided on the drive coil 14 or the lace coil 10 or the intermediate retaining device 22, wherein the drive coil 14 and the lace coil 10 or the retaining device 22 can then be axially movable relative to one another, for example, adjustable relative to one another along the aforementioned rotational axis 11, in order to allow engagement or latching on the one hand and release of the driver device 18 on the other.

[0062] For example, the driver pawls 20 can be elastically pressed axially into the drive spool 14 to allow them to slide over the interacting driver recesses 21 in the freewheeling direction, and conversely, rebound toward the lace spool 10 to engage in the tensioning direction. Alternatively or additionally, the two spools 10 and 14 can be axially pushed away from each other to allow the sawtooth-like driver profiles to slide away upon rotation in the freewheeling direction, and conversely, moved toward each other, for example, moved toward each other in an elastically preloaded manner to engage in the tensioning direction.

[0063] The elastic prestressing of the driver pawls 20 and / or the coils 10, 14 relative to one another can be effected, for example, by a suitable prestressing device, in particular a spring device, for example a disc spring or the like, which can be seated on the rotation axis 11.

[0064] If the traction means 15 is tensioned and thereby the drive coil 14 is rotated and the lace coil 10 is taken along accordingly, as Fig. 4 shows, the tensioning means 15 unwinds from the drive spool 14. In order to enable a new stroke and / or to stow the tensioning means 15 in the form of the tensioning cable 13 again upon reaching the fully tensioned lacing position, the aforementioned drive spool 14 can advantageously be rotated in the free-running direction relative to the lace spool 10 by a retrieval device 23. The aforementioned retrieval device 23 can, for example, have a spring device 24, for example in the form of a spiral spring, which attempts to rotate the drive spool 14 in the free-running direction relative to the lace spool 10. Alternatively or additionally, the retrieval device 23 can also be rotated in the free-running direction, for example via a rubber band or a helical spring that acts eccentrically on the drive spool 14.

[0065] Fig. 5a shows the retrieval of the tensioning cable 13 by elastically twisting the drive spool 14 in the free-running direction 25, by which the tensioning cable 13 is rewound onto the drive spool 14 after the actuating handle 26 is released.

[0066] However, the lace coil 10 does not rotate with the drive coil 14, but is blocked or held in place by the aforementioned retaining device 22.

[0067] The retaining device 22 can block the lace spool 10 in rotation, wherein the retaining device 22 can advantageously be designed as a backstop which only prevents rotation of the lace spool 10 in a release direction of rotation opposite to the tensioning direction 19, but on the other hand allows the tensioning movement of the lace spool 10 in the tensioning direction 19 in the manner of a freewheel.

[0068] The aforementioned retaining device 22 can, in particular, have one or more locking pawls 27, which can be sawtooth-shaped and can engage in complementary locking recesses or contours 28. For example, the locking pawls 27 can protrude circumferentially and engage in a sawtooth-shaped locking contour profile 28 on the inner circumference of the housing 16. The locking pawls 27 can be mounted on spring arms 29, which press or clamp the locking pawls 27 into the locking contours or recesses 28, but on the other hand, when rotated in the clamping direction 19, allow the locking pawls 27 to slide over the locking contours 28.

[0069] The one or more locking pawls 27 can protrude from the outer circumference and be attached to or connected to the lace coil 10, while the locking contours or recesses 28 can be provided on an inner circumference, for example, of the housing 16. Alternatively or additionally, a reverse arrangement is also possible, for example, locking pawls that protrude from the inner circumference of the housing 16 to the inside, and locking recesses in an outer circumference of the lace coil 10 or a part connected thereto.

[0070] How Fig. 3 and 5As illustrated in the drawings, the retaining device 22 can have a retaining wheel 30, which is arranged adjacent to an end face of the lace spool 10 and can be brought into rotationally fixed engagement with said lace spool 10. In particular, said retaining wheel 30 can be provided between the lace spool 10 and the drive spool 14, in which case the previously described driver device 18 can be provided between the drive spool 14 and the retaining wheel 30 in order to drive the retaining wheel 30 and the lace spool 10, which is rotationally fixedly connected thereto, when the drive spool 14 is rotated in the tensioning direction 19.

[0071] The described locking pawls 27 and / or the locking contours 28 can be provided on the said retaining wheel 30, cf. Fig. 3 For example, the retaining wheel 30 may have spring arms 29 provided on the outer circumference, which carry the locking pawls 27 and / or locking contours 28.

[0072] Advantageously, the lace spool 10 can be uncoupled from the retaining wheel 30 in order to be able to rotate it against the tensioning direction 19 despite the backstop and to release the cords 4 again.

[0073] The detachable, rotationally fixed coupling 31 between the retaining wheel 30 and the lace spool 10 can, for example, be designed in the form of a claw coupling, which can comprise claws 32 projecting from the front side on the retaining wheel 30 and / or on the lace spool 10 and coupling recesses cooperating therewith in the front side of the lace spool 10 and / or the retaining wheel 30, cf. Fig. 3 .

[0074] If the lace spool 10 is pulled or pushed axially away from the retaining wheel 30, the rotationally fixed coupling 31 between the retaining wheel 30 and the lace spool 10 is disengaged, so that the lace spool 10 can rotate in the release direction 33 and the shoelace 8 can thus be unwound.

[0075] For example, the lace coil 10 can be mounted axially displaceably on the rotation axis 11, wherein an unlocking element 34, for example in the form of a housing cover, can be connected to the lace coil 10 in order to be able to uncouple the lace coil 10 from the retaining device 22 by pulling out the aforementioned unlocking element 34, cf. Fig. 7b compared to Fig. 7a .

[0076] If the coil arrangement is supported on both sides, as Figure 8shows, for example arranged tangentially to the top of the shoe, so that the quick-release device 9 is accessible from both front ends, the unlocking can also be achieved very simply in that the lace coil 10 can be unlocked, for example, from the opposite end of the quick-release device 9, i.e. from the front side of the drive coil 14 facing away from the lace coil 10, for example by pressing in an axle pin connected to the lace coil 10, which can pass through the drive coil 14 and emerge at the opposite front side, in order to move the lace coil 10 axially away from the drive coil 14 or the aforementioned retaining wheel 30.

[0077] When the lace and drive coils are mounted on two sides, for example between two legs of the U-shaped support part 12, as Figure 8shows, the lace coil 10 on the one hand and the drive coil 14 on the other hand can also easily have separate axes of rotation, which can nevertheless be arranged coaxially to one another.

Claims

1. Shoe having a lacing (4) that comprises at least one shoelace (8), and a quick-tensioning device (9) for tensioning and holding the shoelace (8), which comprises a lace coil (10) for winding and tensioning the shoelace (8), and a drive coil (14) for driving the lace coil (10), wherein the drive coil (14) and the lace coil (10) are arranged coaxially to one another one behind the other on a common spindle and an entrainer device (18) having a freewheel is provided, which transmits a rotation of the drive coil (14) in a tensioning direction (19) to the lace coil (10) and in the opposite direction of rotation allows the drive coil (14) to spin smoothly relative to the lace coil (10), wherein an automatic, releasable retainer device (22) for automatically holding the shoelace in a tensioned position even during a back-rotation of the drive coil (14) in the freewheel direction is provided, and comprises a backstop for blocking the lace coil (10) against turning in the freewheel direction (25) and allowing the lace coil (10) to run through in the tensioning direction (13), characterised in that the retainer device (22) comprises a retainer wheel (30) which comprises latches (27) and / or catch contours (28) on the peripheral side which can be brought into latching engagement with catch contours (28) and / or latches (27) on a housing surrounding the lace coil (10), wherein a releasable coupling is provided between the retainer wheel (30) and the lace coil (10), which coupling connects the retainer wheel (30) to the lace coil (10) in a rotationally fixed manner in the coupled-in position, and in the decoupled position allows the lace coil (10) to spin relative to the retainer wheel (30), wherein the mentioned coupling (31) can be locked and unlocked by axial movement of the retainer wheel (30) and / or of the lace coil (10) in the direction of the spindle (11) of the lace coil (10).

2. Shoe according to the preceding claim, wherein a resilient return device (23), which attempts to turn the drive coil (14) in the freewheel direction (25), is provided.

3. Shoe according to the preceding claim, wherein the return device (23) comprises a spring (24), in particular a helical spring, for resiliently preloading the drive coil (14) relative to the lace coil (10) in the freewheel direction (25).

4. Shoe according to any of the preceding claims, wherein the quick-tensioning device (9) comprises an actuation element (34) on a front-face end portion for unlocking the lace coil (10) and releasing the lacing (4), wherein the mentioned actuation element (34) can be actuated in a direction perpendicular or frontally to a shoe surface, or perpendicular or frontally to a shoe shaft (7), or can be actuated in a direction tangential to the shoe surface, in particular tangential to the shoe shaft (7).

5. Shoe according to either of the two preceding claims, wherein the actuation element (34) comprises an actuation surface, the size of which is at least 50% or at least 75% of the front face of the lace coil (10).

6. Shoe according to any of the preceding claims, wherein a non-rigid traction means (15), in particular a tensioning cord (13), for actuating the drive coil (14) is provided and can be wound up onto the drive coil (14), wherein the drive coil (14) comprises a winding / unwinding guide, in particular in the form of an inlet / outlet opening (17), provided in a housing (16) surrounding the drive coil (14), for keeping available and pulling out the traction means (15) in an upwardly directed pulling direction, in particular approximately in parallel with a shinbone of a foot wearing the shoe.

7. Shoe according to any of the preceding claims, wherein the drive coil (14) and / or the lace coil (10) comprise a spindle (11) which is oriented perpendicularly or frontally to a surface of an upper (2) and is arranged in the region of an upper end portion of the lacing (4), wherein the spindle (11) of the drive coil (14) and the lace coil (10) is arranged in particular at the upper end of a tongue (6) and is oriented perpendicularly or frontally to the surface of the tongue (6).

8. Shoe according to any of claims 1 to 6, wherein the drive coil (14) and / or the lace coil (10) comprise a spindle (11) which is oriented tangentially or horizontally, transversely to a surface of an upper (2) and is arranged in the region of an upper end portion of the lacing (4), wherein the mentioned spindle (11) of the drive coil (14) and the lace coil (10) is in particular arranged at the upper end of a tongue (6) and oriented horizontally, transversely or tangentially to the surface of the tongue (6).

9. Shoe according to any of the preceding claims, wherein the drive coil (14) and the lace coil (10) are accommodated in a common housing (16).