Footwear for preventing or treating foot conditions in a wearer

Abstract

Footwear (10) is provided for preventing or treating foot pathologies of a wearer, and includes a toe strap (26) for fastening around the big toe, an upper (14) for fastening around the midfoot and including a lateral portion (16) and a central portion (18), and an adjustment mechanism (20) coupled to the toe strap (26) and including a tensioning element (24) configured to variably adjust the tension applied to the toe strap (26). The adjustment mechanism (20) is disposed within or on the lateral portion (16) of the upper (14), and the tensioning element (24) is guided on the lateral side of the footwear (10). The central portion (18) of the upper (14) extends medially from the adjustment mechanism (20) toward the center of the footwear (10), and its circumferential length is adjustable.

Description

[Technical field]

[0001] The present invention relates to footwear for preventing or treating pathologies in the midfoot and forefoot area of ​​the wearer's foot, particularly the joint connecting the big toe and foot, such as pathologies known as hallux valgus or bunions. [Background technology]

[0002] Deformities or malpositions of the midfoot and forefoot, especially the pathological distortion state of the big toe, called hallux valgus, can be caused by different factors. For example, such pathological deformations can be caused by genetic predisposition, wearing of inappropriate footwear, especially shoes with an overly rigid heel, or flattening of the longitudinal and transverse arches as a result of instability of the midfoot, especially due to instability of the connective tissues. As a result of flattening of the transverse arch, also called splay foot, the individual metatarsals and bones of the toes radially fan out. The metatarsals of the first radiation, i.e. the medial or medial metatarsal, are abducted inwards. As a result, the tendons of the big toe, unlike the other toes, have an independent tendon tissue and no longer run centrally over the first metatarsophalangeal joint, but on its lateral side, due to its predefined length. Thus, the big toe is pulled obliquely and into an outward-directed position. The formation of hallux valgus is therefore amplified by the subsidence of the longitudinal arch. This is because this predominant medial depression results in lateral rotation of the metatarsals and forefoot anatomically when viewed from above.

[0003] In this disclosure, as is common in anatomy, a reference system centered on the midline of the wearer's body is used to indicate the location and orientation of the individual components of the proposed footwear when the footwear is worn on the wearer's foot. Thus, the term "medial portion" refers to the direction or side of the footwear toward the medial plane of the wearer's body, i.e., the medial plane of the body of the person wearing the footwear. In anatomy, the term "medial surface", also called the "medial sagittal plane", generally refers to an anatomical plane that divides the body into two symmetrical portions, i.e., that passes through the midline structure of the body. Thus, when describing one of a pair of footwear, i.e., worn on one of the wearer's feet, the term "medially" means in the direction of the respective other footwear, i.e., the footwear worn on the wearer's other foot. To that end, the term "lateral surface" refers to the direction or side of the footwear that is away from the medial plane of the wearer's body. Thus, when describing one piece of a pair of footwear, i.e., footwear worn on one of a wearer's feet, the term "laterally" means in a direction away from the respective other piece of footwear, i.e., the footwear worn on the wearer's other foot.

[0004] From the prior art, the use of therapeutic footwear is known to prevent or treat hallux valgus of the wearer's foot. For example, US 2016 / 0242508 A1 discloses a therapeutic sandal configured to reposition the wearer's big toe to reduce pressure on the first metatarsal toe joint. To do so, the sandal comprises a sole in which an adjustable strap is movably guided from the medial side to the lateral side of the sandal. A toe portion of the strap protrudes from the medial side and is fixed to the sole to form a loop for receiving the wearer's big toe. To that end, a midfoot portion of the strap protrudes from the lateral side of the sole and is fixed to a slot on the medial side to hold the wearer's midfoot area between the midfoot portion of the strap and the sole. An end of the midfoot portion of the strap is guided through a slot on the medial side of the sole and is joined to the upper surface of the midfoot portion by a Velcro® connection on the wearer's foot. In this way, the length of the strap can be adjusted. In particular, such a configuration allows the therapeutic force on the big toe to be adjusted when tightening the strap. However, by doing so, ie, shortening the effective length of the strap, the midfoot and toe portions of the strap around the midfoot region of the foot are tightened simultaneously.

[0005] Thus, in known therapeutic footwear, the establishment or adjustment of the retention force applied to the midfoot region and the therapeutic force applied to the big toe communicate directly with each other, i.e., cannot be adjusted independently of each other, which may affect the proper fastening of the footwear to the wearer's foot and / or the proper adjustment of the therapeutic force applied to the wearer's foot. Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the present invention is to provide an improved footwear for preventing or treating pathologies of the wearer's foot, in particular of the joint connecting the big toe to the foot, which in particular allows for a more effective and accurate fitting or adjustment of the footwear to the wearer's foot. Preferred embodiments are set out in the present description, drawings as well as in the dependent claims. [Means for solving the problem]

[0007] Thus, footwear is provided for preventing or treating pathologies of a wearer's foot, in particular of the joint connecting the first toe and the foot. The proposed footwear comprises a toe strap configured to be fastened to the first toe, an upper configured to be fastened to the midfoot region of the foot and comprising a lateral portion and a central portion, and an adjustment mechanism coupled to the toe strap and comprising a tensioning element. The adjustment mechanism is configured to variably adjust a pulling force applied to the toe strap, which in a fastened state in which the footwear is fastened to the foot, translates into a corrective force acting on at least one of the joint and the first toe. The adjustment mechanism is at least partially arranged in or on the lateral portion of the upper, such that the tensioning element is guided to the lateral side of the footwear. The central portion of the upper extends from the adjustment mechanism in a medial direction towards the medial side of the footwear and is adjustable in its circumferential length.

[0008] The proposed footwear may be used for the prevention or treatment of pathologies or malpositions of the wearer's or patient's foot. In particular, the proposed footwear may be used for the prevention or treatment of hallux valgus or bunion, but is not limited to this application. Hallux valgus or bunion typically refers to a pathological deformation or malposition of the joint that connects the first toe to the patient's foot, also referred to below as "big toe joint". The proposed footwear may therefore be used for the prevention or treatment of deformations or malpositions of the wearer's big toe joint.

[0009] In the following, in order to prevent or treat the aforementioned pathological deformities of the wearer's or patient's foot, the proposed footwear is constructed and designed to exert a corrective force on the foot when the footwear is in a worn state, i.e. when fastened to the foot. In particular, the corrective force is intended to correct those parts of the foot that have suffered from pathological deformities to their anatomically correct or intended positions to achieve the desired therapeutic effect. A detailed description of the corrective force exerted on the wearer's foot and the therapeutic effect correlated therewith is provided below in conjunction with the description of the components of the footwear related thereto.

[0010] As mentioned above, the proposed footwear is configured and designed to be fastened, i.e. releasably fastened, to the patient's foot. In the context of the present disclosure, the term "footwear" refers to any garment, in particular a shoe, intended to be worn on the patient's foot in a predefined position and orientation relative to the foot. In particular, the footwear can be provided in the form of any kind of shoe, for example a closed shoe or an open shoe such as a sandal. The footwear may also be provided in the form of a splint.

[0011] The footwear may include a base or sole configured to receive the bottom or plantar part of the foot. In other words, in the fastened state of the footwear, the plantar part may be in contact with the sole. Furthermore, the sole may be designed to give the footwear a certain structural stability and wear resistance, i.e. to receive and absorb forces during the use of the footwear. Thus, the sole may be given a higher mechanical strength, resistance and rigidity compared to other components of the footwear. The sole may be provided as a one-piece part or as a multi-piece part. In particular, the sole may be provided with a multi-layer design that may include at least two layers, in particular horizontal layers. For example, the sole may include a layer structure including at least two of the following: an outsole, a midsole, an insole and an insert sole. The sole may be made of any suitable material or a mixture of different materials.

[0012] As mentioned above, the footwear comprises a toe strap configured to be secured to the big toe, also called the first toe, big toe or innermost toe. In other words, in the fastened state of the footwear, the toe strap may be designed and configured to hold and secure the big toe in a predetermined position within the footwear, and in particular with respect to the sole. To do so, the toe strap may be held by the sole or in particular fixedly attached to the sole.

[0013] In particular, the toe strap may have a first end fixed to the sole. The toe strap may be provided such that, in the fastened state of the footwear, the first end is arranged between the first and second toes. According to one configuration, the first end of the toe strap may at least partially penetrate into the sole and may optionally be arranged between different layers of the sole. In this way, a particularly tight connection between the sole and the toe strap may be obtained.

[0014] Furthermore, the toe strap may comprise a second end located on the opposite side compared to the first end. The second end may be fastened to a tensioning element of the adjustment mechanism. According to one configuration, the second end of the toe strap may be removably fixed to the tensioning element. In this way, the connection between the second end of the toe strap and the tensioning element may be selectively engaged and disengaged. By allowing the second end of the toe strap to be released from the tensioning element, the footwear may allow the upper layer of the sole, i.e. the insole or insert sole, to be removed and replaced. This may be achieved by the sole being provided with a through opening in its upper layer through which the toe strap, i.e. its first end, is led. By releasing the second end so as to be exposed from any other component of the footwear, the upper sole is released from the sole and moves relative to the toe strap such that the toe strap is pulled out of the through opening in the upper layer, thereby allowing the upper layer to be structurally removed from the footwear.

[0015] The toe strap may be provided such that a first end of the toe strap is disposed forward of a second end of the toe strap in a forward direction of the footwear, i.e., in a direction from the heel toward the forefoot of the foot.

[0016] The toe strap may have an elongate shape, i.e. a length substantially greater than its width. Moreover, the toe strap may have a flat shape with a thickness substantially less than its length and width. The toe strap may be fixed to the sole in the region of its first end such that the toe strap is arranged parallel to the forward direction of the footwear. In other words, in the region of its first end, the toe strap may be arranged such that its width direction points in a direction substantially parallel to the forward direction of the footwear. In this way, the comfort of the footwear may be improved.

[0017] The toe strap may be configured and designed to be circumferentially disposed around the big toe when the footwear is in its fastened state. In this configuration, the footwear may be provided such that applying a pulling force to the toe strap, particularly to its second end, may adjust the wrap length of the toe strap around the big toe via the tensioning element. That is, applying a pulling force to the toe strap may decrease the wrap length of the toe strap around the big toe. By doing so, the pulling force may be converted into a corrective force acting on the big toe such that the big toe is moved or tensioned medially. As a result, the big toe receives a therapeutic force, which forces it into an anatomically correct or desired position to prevent or treat a foot pathology.

[0018] In a further configuration, the footwear may be provided such that the toe strap is designed and configured to pass from its first end to the medial side of the footwear through the big toe in the fastened state of the footwear. In particular, the toe strap may be tensioned to extend along the lateral surface of the foot, in particular the big toe, from the lateral side of the toe to the medial side of the toe and / or the big toe joint. In this configuration, the toe strap, in particular its longitudinal axis, may extend along the lateral surface of the big toe in the medial direction and in the posterior direction of the footwear, i.e. from the toe towards the heel of the foot. In other words, according to this configuration, the toe strap, in particular its longitudinal axis, may extend along the lateral surface of the big toe in the posterior and medial direction, i.e. inclined medially and posteriorly. In this way, the toe strap, in particular its longitudinal axis, may have a helical shape.

[0019] Furthermore, the toe strap may be provided with a seating surface configured to contact and fit against the outer surface of the foot, i.e., against at least one of the joints connecting the big toe and the foot, in the fastened state of the footwear. Optionally, in the fastened state of the footwear, other parts of the footwear, for example, an upper part such as a central part, may be arranged between the outer surface of the foot and the seating surface. Specifically, in the fastened state of the footwear, the seating surface may be provided with a first effective surface arranged on the side or area of ​​the big toe and a second effective surface arranged on the side or area of ​​the big toe or the central side of the big toe joint. In this configuration, when a pulling force is applied to the toe strap, the first effective surface may apply a first corrective force to the side of the big toe, which moves the big toe and / or tensions the big toe in a medial direction. To that end, when tension is applied to the toe strap, the second active surface can apply a second corrective force to the medial side of the big toe and / or the big toe joint, displacing and / or pulling the joint laterally, resulting in a therapeutic force being applied to both the big toe and the joint, thereby forcing them into the anatomically correct or desired position. In this way, a particularly effective treatment or prevention of hallux valgus can be provided.

[0020] Furthermore, as mentioned above, the footwear comprises an upper configured to be attached to the midfoot region of the foot. In the context of the present disclosure, the term "upper" refers to a part of the footwear, which is configured to hold the foot in a desired position and orientation within the footwear. According to one configuration, for example, when the footwear is provided in the form of an open shoe such as a sandal, the upper may be configured by one or more straps extending over the midfoot region of the foot. In the worn state of the footwear, the upper may be designed and configured to hold and fix the midfoot region of the foot in a predetermined position within the footwear, in particular relative to the sole. To do so, the upper may be held or attached to the sole, in particular attached in a fixed state. In particular, for example, at least one of the lateral and central portions of the upper may be fastened or fixed to the sole. In particular, the lateral ends of the lateral portions may be fastened or fixed to the sole, in particular directly fastened or fixed. Alternatively or additionally, the central end of the central portion may be fastened or fixed to the sole, in particular directly fastened or fixed to the sole.

[0021] In the proposed footwear, as described above, the upper includes a lateral portion and a central portion. In the context of this disclosure, the lateral portion and the central portion refer to distinct and separated portions of the upper, where the lateral portion extends laterally therefrom and the central portion extends medially therefrom along the boundary between the portions.

[0022] In particular, the lateral portion is provided and intended to carry or house the adjustment mechanism, in particular at least a part thereof, and thus the adjustment mechanism may be arranged on or within the upper lateral portion, i.e. disposed laterally, i.e. laterally, from the boundary extending between the upper lateral portion and the central portion.

[0023] To that end, in the proposed footwear, the central portion can refer to a portion of the upper that extends from the adjustment mechanism in a central direction toward the center of the footwear. In other words, the central portion can be located adjacent to or away from the adjustment mechanism. Thus, the central portion can refer to a portion of the upper that is not in direct contact with the adjustment mechanism.

[0024] The operation and structure of the adjustment mechanism is further described below.

[0025] The adjustment mechanism is designed and configured to variably adjust the tension applied to the toe strap, which in the fastened state of the footwear is converted into a corrective force acting on the big toe and at least one of the joints connecting the big toe to the foot. In other words, the adjustment mechanism is designed and configured to variably set the corrective force applied to the big toe or at least one of the joints connecting the big toe to the foot. To do so, the adjustment mechanism includes a tension element connected to the toe strap.

[0026] In the context of the present disclosure, the term "adjustment mechanism" may refer to a component of the footwear that is configured to tighten and / or release the toe strap and may be disposed on the lateral portion of the upper. Furthermore, the term "tensioning element" refers to a rope- or wire-like component, i.e., a flexible component, that is designed and configured to transmit tension to the toe strap, particularly to its second end. In other words, the tensioning element may be a tension-resistant wire that connects the toe strap to the adjustment mechanism in a force-fit manner.

[0027] The footwear may be provided such that a tensioning element is movably guided within the footwear so as to be able to apply a tensioning force to the toe strap. In particular, the tensioning element is supported within the footwear such that the second end is movable along its longitudinal axis so as to tension the toe strap, in particular its second end, thereby allowing the application of a tensioning force.

[0028] As mentioned above, the lateral portion is intended and configured to guide the tension element of the adjustment mechanism to the lateral side of the footwear. Furthermore, the adjustment mechanism and the lateral portion of the upper may be designed and provided such that the tension element is guided to the sole of the footwear. For example, the tension element may be supported along the lateral side of the footwear such that it is guided from the lateral or outer side of the footwear to the sole of the footwear. In particular, the tension element may be supported or guided in or on the lateral portion of the upper such that the tension element is translationally movable relative to a transverse plane along its longitudinal axis.

[0029] The tension element may be supported or guided on the sole such that the tension element is translationally movable relative to the sole along its longitudinal axis. Or alternatively, the toe strap may be supported or guided in or on the sole of the footwear such that the toe strap is translationally movable relative to the sole along the longitudinal axis of the tension element. In this configuration, a coupling for connecting the tension element to the toe strap may be located in or on the sole and may be configured such that upon actuation of the toe strap, i.e., when subjected to a pulling force, the tension element and the toe strap translate relative to the sole along the longitudinal axis. Alternatively, the coupling for connecting the tension element to the toe strap may be located on a lateral side of the footwear, on a lateral portion of the upper or on a medial side of the footwear, in particular on a medial lateral side of the footwear.

[0030] To do so, the sole may be provided with a channel for receiving and guiding at least one of the tension element and the toe strap. With this configuration, the tension element and / or the toe strap may be supported on the sole such that they are translationally movable relative to the sole along a longitudinal axis of the channel. In this configuration, the longitudinal axis of the channel may coincide with or be parallel to a longitudinal axis of a portion of the tension element and / or the toe strap that is disposed within the channel.

[0031] Specifically, the channel may be provided to extend from the medial side to the lateral side of the footwear through the sole in the lateral and rearward directions of the shoe. In other words, the channel, i.e., its longitudinal axis, may extend at an angle rearward and laterally from the medial side to the lateral side of the footwear. The channel may also be provided in the sole such that it is located rearward of the first toe joint or ball in the rearward direction of the footwear when the footwear is fastened.

[0032] The sole may be designed such that the tension element is guided through one of the layers of the sole or between two of the layers of the sole. Thus, a channel for supporting and guiding the tension element and / or the toe strap may be provided passing through one layer or element of the sole or between two layers or elements of the sole. For example, the tension element may be guided through the outsole or between the outsole and the insole or between the insole and the insert sole.

[0033] Also, for actuating the tensioning element, in particular for tightening or releasing, the adjustment mechanism further comprises an adjustment unit. The adjustment mechanism may be provided such that the tensioning element is translated relative to the adjustment unit, in particular along its longitudinal axis, to vary the tensioning force applied to the toe strap. In addition, the adjustment mechanism may be configured to selectively lock the translational movement between the adjustment unit and the tensioning element, in particular along the longitudinal axis of the tensioning element, to set and maintain a desired tensioning force to be applied to the toe strap. The adjustment unit may be configured to selectively release, i.e. allow or lock, the relative translational movement between the tensioning element and the adjustment unit along the axial direction of the tensioning element, to vary, adjust and set the tensioning force applied to the toe strap. In other words, the adjustment unit may be configured to selectively engage or disengage a force-fit connection between the adjustment unit and the tensioning element.

[0034] In a further aspect, the adjustment unit may be operated in a clamping or releasing mode of operation, allowing relative translational movement between the adjustment unit and the tensioning element along its longitudinal axis. Additionally, the adjustment unit may be operated in a fixed mode of operation, in which relative translational movement between the adjustment unit and the tensioning element along its longitudinal axis is fixed or locked. The adjustment unit may be configured to switch from the fixed mode of operation to the clamping or releasing mode of operation when an actuation force applied to the adjustment unit by a user exceeds a threshold value.

[0035] According to one configuration, the adjustment unit may comprise a rotatably actuatable element, in particular a rotation knob, where the adjustment unit is configured to convert a rotational movement of the rotatably actuatable element into a translational movement of the tensioning element relative to the adjustment unit along the longitudinal axis of the tensioning element. For example, the adjustment unit may be configured such that a rotational movement of the rotatably actuatable element in a first direction causes a tightening of the tensioning element, and a rotational movement of the rotatably actuatable element in a second, opposite direction causes a release of the tensioning element. The tightening of the tensioning element can be achieved by retracting the tensioning element into the adjustment unit, and the release of the tensioning element can be achieved by withdrawing the tensioning element from the adjustment unit.

[0036] According to one configuration, the tensioning element may be provided in the form of a lace, where the adjustment unit may be constituted by an end of the lace, in particular a lateral end, and a lace eyelet provided in the lateral portion of the upper part. In particular, it may be designed and provided such that the end of the lace can be threaded through the lace eyelet and that the lace can be moved relative to the lace eyelet in the longitudinal axis of the lace to tighten or release the adjustment mechanism. Furthermore, the adjustment unit may be designed and provided such that the lace is fixed to the lace eyelet by a shoe-tying knot and locks the relative movement between the lace and the lace eyelet along the longitudinal axis, in particular in at least one direction.

[0037] According to one configuration, the tension element can be provided at least partially, for example with its lateral ends in the form of straps, and the adjustment unit can be constituted by a Velcro® connection between the tension element, i.e. its lateral end and the lateral part of the upper part. With such a configuration, the tension element can be removably and adjustably fixed to the adjustment unit, i.e. the lateral part of the upper part. To tighten or release the tension element, in order to vary and adjust the pulling force applied to the toe strap, the Velcro® connection is released and the tension element can move relative to the adjustment unit, i.e. along its longitudinal axis. After the desired pulling force has been adjusted, the Velcro® connection is engaged, fitting the lateral ends of the tension element tightly to the upper surface of the lateral part of the upper part. In this way, the relative translational movement between the tension element and the adjustment unit can be locked.

[0038] It will be obvious to those skilled in the art that the proposed footwear is not limited to the above-mentioned configurations for the adjustment mechanism, but rather any suitable fastening means may be used as an adjustment mechanism within the meaning of the present disclosure, the fastening means being suitable for selectively locking or releasing the relative translational movement of the tensioning element with respect to the lateral portion of the upper, the tensioning element being disposed on or within the lateral portion of the upper.

[0039] As noted above, the midsection refers to a portion of the upper portion that extends medially from the adjustment mechanism toward the center of the footwear, such that, in a fastened state of the footwear, the midsection is configured to overlie or be positioned over the midfoot region of the foot to hold the footwear in a desired position and orientation on the foot.

[0040] Additionally, the central portion is designed to be adjustable, i.e., variably adjustable in its circumferential length. In the context of this disclosure, the terms "circumferential" or "circumferential length" refer to the circumference or extent of the central portion that defines a path along the midfoot region of the foot between the lateral and central portions of the footwear.

[0041] By being variably adjustable in circumferential length, the central portion can ensure a proper adjustment of the upper to the foot to be received in the footwear. In this way, the footwear, i.e. its shape, can be purposely adapted to different foot shapes, thus providing the footwear with a degree of configurability. As a result, a proper fitting of the footwear to different foot types and shapes may be ensured.

[0042] The central portion may be configured to be adjustable in its circumferential length independent of the actuation of the adjustment mechanism. In particular, the central portion may be configured to be able to increase or decrease its circumferential length independent of the actuation of the adjustment mechanism. For example, when the adjustment mechanism is in a released state in which the toe strap and thus the tensioning element are not subjected to a pulling force, the central portion is adjustable in its circumferential length independent of the actuation of the adjustment mechanism, i.e., independent of or independent of the tightening or releasing of the tensioning element and / or the toe strap. In other words, in the fastened state of the footwear, the central portion may be subjected to a pulling force for holding the foot, i.e., a pulling force in its midfoot region relative to the footwear, which may be adjusted or applied independently of the pulling force applied to the toe strap.

[0043] In the proposed footwear, the adjustment mechanism may be received in or on the lateral portions, the central portion extending from the adjustment mechanism towards the center of the footwear, so that the central portion and the adjustment mechanism are spatially separated from each other. With such an arrangement, the proposed footwear offers the advantageous effect that the adjustment of the pulling force applied to the toe strap is possible decoupled from the adjustment of the circumferential length of the central portion of the upper and vice versa. Thus, the user can separately activate the adjustment mechanism for setting the pulling force and a further adjustment mechanism, for example provided in the central portion of the upper, for setting the circumferential length of the upper, i.e. of its central portion. In this way, i.e. by providing such a decoupled and selective adjustment, the proposed footwear allows a more precise, i.e. more flexible, adjustment of the footwear to the wearer's foot. Compared to known footwear or therapeutic shoes, the proposed solution allows a more precise adjustment of the desired therapeutic force or effect to be applied, while at the same time increasing the usability and wearing comfort of the footwear, thereby improving the wearer's acceptance of the treatment.

[0044] For example, an improved usability of the footwear may be achieved, since the wearer may wear the proposed footwear more comfortably. In particular, in a first step, the wearer places the foot in the footwear and then adjusts the circumferential length of the upper part, i.e., its central part, so as to properly fasten the footwear to the foot, without simultaneously applying a pulling force on the toe strap or a corrective force on the big toe. During this first adjustment, the user can ensure that the footwear is held appropriately on the foot, both for use and comfortably. Then, after holding the foot in the desired position and attitude, in a next step, the user activates the adjustment mechanism, applying a pulling force on the toe strap and setting the desired or therapeutic force on the big toe or the joint connecting the big toe to the foot. This approach allows a more accurate application of the corrective or therapeutic force to be applied to the big toe or its joint, i.e. already holding the midfoot area of ​​the foot in the desired position and orientation during the accumulation of the corrective or therapeutic force to be applied to the big toe or its joint. In this way, when accumulating a corrective or therapeutic force by activating the adjustment mechanism, the foot, i.e., its midfoot area, can be prevented from moving unintentionally, thereby affecting the desired therapeutic effect to be achieved.

[0045] In order to be able to adjust its circumferential length, the central part may be provided with fastening means arranged to connect two opposing parts of the central part. The two opposing parts may be arranged opposite each other. The two opposing parts may also be arranged to be movable relative to each other in the circumferential direction. In other words, increasing or decreasing the distance between the two opposing parts of the central part allows the circumferential length of the upper part, i.e. the central part, to be increased or decreased. In this configuration, the fastening means may be arranged to connect the two opposing parts in such a way that they are prevented from moving away from each other, i.e. in a tension-resistant manner. In other words, the fastening means may be arranged to connect the two opposing parts of the central part in a tension-resistant manner. Thus, in the released state of the fastening means, the two opposing parts of the central part are movable relative to each other in the circumferential direction, and in the fastened state of the fastening means, the two opposing parts of the central part are in particular prevented from moving away from and / or towards each other. Furthermore, the footwear can be designed such that the fastening means is configured to be fastened or released independently of releasing or locking the relative translational movement between the tensioning element and the adjustment unit, in this way non-interfering adjustment by the adjustment mechanism and the central portion of the adjustable upper can be achieved.

[0046] Specifically, the fastening means of the central portion may be connected to two opposing portions of the central portion via at least one lace and correspondingly designed lace eyelets, and in this configuration, the fastening of the fastening means may be achieved by fastening the at least one lace to the lace eyelets, for example, by tying a shoe-tying knot.

[0047] Alternatively or additionally, the fastening means may consist of an elastic band stretched between two opposing parts of the central portion, or may consist of a Velcro® connection releasably joining the two opposing parts of the central portion to one another.

[0048] In a further aspect, the footwear may be designed such that, in a fastened state of the footwear, with the adjustment mechanism applying a pulling force to the toe strap, an additional pulling force is applied by the adjustment mechanism to counter the pulling force applied by the adjustment mechanism to the toe strap. In this way, a balance of forces is provided in the adjustment mechanism or adjustment unit, holding the adjustment mechanism or adjustment unit in place. In this configuration, the additional pulling force can be directed from the adjustment mechanism through the central portion to the sole. Optionally, an additional pulling force can be provided from the fastening means and directed through the central portion to the sole. Furthermore, this pulling force applied to the central portion or fastening means may induce or cause the central portion to elongate in its circumferential length.

[0049] According to one configuration, the central portion can be constituted by a strap band and a Velcro® connection, the Velcro® connection having a first end connected to the lateral portion, in particular to the lower face, and a corresponding second end fastened to the strap band.

[0050] Alternatively or additionally, the adjustment mechanism may comprise a Bowden cable for connecting the adjustment unit to the toe strap with a force fit, the Bowden cable being constituted by a tensioning element and a pressure-resistant sleeve in which the tensioning element is guided. The pressure-resistant sleeve may be constituted at least in part by a channel provided through the sole. In particular, in one configuration, the Bowden cable may be provided such that the pressure-resistant sleeve is connected, i.e. directly connected, to the adjustment unit. In other words, the pressure-resistant sleeve may be provided such that it extends from the adjustment unit. In this way, a counterforce of the pulling force, i.e. a pulling force counteracting the pulling force, can be directed from the adjustment unit into or towards the pressure-resistant sleeve. The counterforce of the pulling force may thus be prevented from being directed towards the sole via the central portion. With such a configuration, the adjustment of the pulling force can be more effectively decoupled from the adjustment of the circumference of the central portion. [Brief description of the drawings]

[0051] The present disclosure will be readily understood by reference to and consideration of the following detailed description in conjunction with the accompanying drawings, in which: [Figure 1] FIG. 1 is a schematic perspective view of a footwear according to a first configuration provided in the form of a shoe. [Diagram 2] FIG. 2 is a schematic top view of footwear according to a second configuration provided in the form of a sandal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0052] The present invention will now be described in more detail with reference to the accompanying drawings, in which identical elements are given the same reference numerals and their repeated description may be omitted to avoid redundancy.

[0053] FIG. 1 shows footwear 10 provided in the form of a shoe intended to be used to prevent or treat a pathology of the wearer's foot (not shown), and in particular relates to a pathology, also known as hallux valgus, of the joint connecting the big toe to the foot.

[0054] Footwear 10 is configured to be removably fastened to a wearer's foot, as described below, and is constructed and designed to, when fastened to the foot, provide the intended therapeutic treatment by applying a corrective force to the foot, and particularly to the big toe and big toe joint.

[0055] Footwear 10 includes a sole 12 configured to receive the bottom or plantar portion of a foot. Sole 12 is provided with a multi-layer design consisting of an outsole, a midsole, an insole, and an insert sole, which are arranged one above the other. In particular, the insert sole may be removably received within sole 12 so as to be replaceable.

[0056] Footwear 10 further comprises an upper 14 secured to sole 12 and configured to hold the foot in a desired position and orientation within footwear 10, i.e., relative to footwear 10. In other words, upper 14 is configured to be fastened to the midfoot region of the foot. As can be seen from Fig. 1, upper 14 comprises a lateral portion 16 and a central portion 18, the lateral portion 16 and the central portion 18 referring to distinct and delimited portions of upper 14, the lateral portion 16 extending from the central portion 18 in a lateral direction Y, and the central portion 18 extending from the lateral portion 16 in an opposite medial direction Y'.

[0057] In the illustrated configuration, the lateral and central portions 16, 18 of the upper 14 are secured to the sole 12. Specifically, the lateral ends of the lateral portions 16 of the upper 14 are secured to the lateral sides of the sole 12, and the central end of the central portion 18 of the upper 14 is secured to the central side of the sole 12.

[0058] The lateral portion 16 carries an adjustment mechanism 20 of the footwear 10, which comprises an adjustment unit 22 and a tension element 24. In particular, the adjustment mechanism 20 is arranged partially on and within the lateral portion 16 of the upper 14, such that the tension element 24 is guided on a lateral side of the footwear 10, as can be seen in FIG. 1. In particular, the tension element 24 is provided in the form of a wire, one end of which is led into the adjustment unit 22 and the other end of which is connected to a toe strap 26, which is configured to be fastened to the big toe of the foot. In particular, the footwear 10 is provided such that the tension element 24 is releasably connected to the toe strap 26. The adjustment mechanism 20 is configured to variably adjust the pulling force applied to the toe strap 26, which, in the fastened state of the footwear 10, is translated into a corrective force acting on the big toe and the big toe joint.

[0059] Toe strap 26 is at least partially disposed within upper 14 and is adapted to be movable relative to upper 14. When footwear 10 is fastened, toe strap 26 is designed and configured to hold and secure the big toe in a predetermined position within footwear 10, i.e., relative to sole 12.

[0060] Specifically, the toe strap 26 includes a first end 28 that is fixedly secured to the sole 12 such that, in the fastened state of the footwear 10, the first end 28 of the toe strap 26 is disposed between the first and second toes. In the illustrated configuration, the first end 28 of the toe strap 26 protrudes into the sole 12 and is disposed between two layers of the sole 12, for example, between the insole and the midsole. Opposite the first end 28, the toe strap 26 further includes a second end 30 that is disposed in front of the first end 28 in the forward direction X and the lateral direction Y of the footwear 10. The second end 30 of the toe strap 26 is removably connected to the tension element 24, thereby allowing the insert sole to be replaced.

[0061] As can be seen from FIG. 1, the toe strap 26 is provided in an elongated, flat shape, with a first end 28 thereof disposed parallel to the forward direction X of the footwear 10. Furthermore, the toe strap 26 is configured and designed to be disposed circumferentially around the big toe such that, in the fastened state of the footwear 10, the wrap length of the toe strap 26 around the big toe is adjustable by applying a pulling force to the toe strap 26 via the tensioning element 24. More specifically, the toe strap 26 is configured to go around the big toe such that the toe strap 26 extends along the outer surface of the foot from the side of the big toe to the central side of the big toe and the joint of the big toe. Thus, in the fastened state of the footwear, the toe strap 26 extends obliquely along the outer surface of the big toe backwards, i.e., along the rear direction X' of the footwear, and centrally, i.e., along the central direction Y' of the footwear. With this configuration, the application of tension to the toe strap 26 prevents the big toe from undergoing a rotational movement.

[0062] The toe strap 26 is provided with a seat surface 32 configured to closely contact the outer surface of the foot when the footwear 10 is fastened. Specifically, the seat surface 32 includes a first effective surface provided in the area of ​​the first end 28 of the toe strap 26 that closely contacts the side of the big toe, and a second effective surface provided in the area of ​​the second end 30 of the toe strap 26 that fits the central side of the big toe and the big toe joint. With this configuration, when a pulling force is applied to the toe strap 26, the first effective surface applies a first corrective force F1 to the side of the big toe, and the second effective surface applies a second corrective force F2 to the central side of the big toe joint. In this way, both the big toe and the big toe joint are subjected to a corrective therapeutic force that forces them to be anatomically positioned in a desired or correct position, thereby providing an effective therapeutic treatment for hallux valgus.

[0063] In order to purposefully convert the pulling force into the above-mentioned corrective force, an adjustment mechanism is provided, in which the tension element 24 is guided through the sole 12 in the width direction of the sole 12, guided towards the central side of the footwear 10, and connected to the toe strap 26. Specifically, in this configuration, the tension element 24 is movably supported and guided within the footwear 10, in particular within the lateral portion 16 of the upper 14 and in the sole 12, so that a pulling force can be applied to the toe strap 26. To do so, the footwear 10 is provided with a channel 34 that continues through the lateral portion 16 of the upper 14 and the sole 12. With such a configuration, the adjustment mechanism 20 and the lateral portion 16 of the upper 14 are designed such that the tension element 24 is directed from the lateral side of the footwear 10 into the sole 12. Additionally, the channel 34 supports and guides the tension element 24 within the lateral portion 16 of the upper 14 and within the sole 12 such that the tension element 24 is translationally movable along its longitudinal axis, i.e., along the longitudinal axis of the channel 34, relative to the lateral portion 16 and the sole 12. In an alternative configuration, the second end 30 of the toe strap 26 may be configured to protrude into and be guided therein and be translationally movable relative to the channel 34.

[0064] In particular, the channel 34 may be provided such that the channel 34 and the tension element 24 are guided through the outsole, or between the outsole and the insole, or between the insole and the insert sole.

[0065] Furthermore, in the illustrated configuration, the channel 34 is arranged with its central opening (not shown) opening into the interior space of the upper 14, and is designed so that the central end of the tension element 24 and the second end 30 of the toe strap 26 are located within the interior space of the upper 14. Alternatively, the channel 34 may be designed so that its central opening is located on the outer surface of the sole 12, and the central end of the tension element 24 and the second end 30 of the toe strap 26 are located on the outer surface of the upper 14. In this configuration, in the front region of the footwear 10, the upper 14 may be provided with a through opening through which the second end 30 of the toe strap 26 is pulled and placed on the outer surface of the upper 14 to connect to the tension element.

[0066] To actuate the tensioning element 24, the adjustment mechanism 20 comprises an adjustment unit 22. The adjustment mechanism 20 is arranged such that the tensioning element 24 is translated along its longitudinal axis relative to the adjustment unit 22 to vary the tensioning force applied to the toe strap 26. To do so, the adjustment unit 22 is configured to selectively release and lock the relative translational movement between the tensioning element 24 and the adjustment unit 22 along the longitudinal axis of the tensioning element 24 to vary and regulate the tensioning force applied to the toe strap 26.

[0067] In the illustrated configuration, the adjustment unit 22 is provided in the form of a rotating knob, the rotational movement of which is converted into a translational movement of the tensioning element 24 relative to the adjustment unit 22. In other words, when rotationally actuated by a user, the adjustment unit 22 causes a translational movement of the tensioning element 24 to adjust the tensioning force acting on the toe strap 26. In particular, the adjustment unit 22 is configured such that a rotational movement of the adjustment unit 22 in a first direction causes a tightening of the tensioning element 24 and a rotational movement in a second, opposite direction causes a loosening of the tensioning element 24, the tightening of the tensioning element 24 being achieved by pulling it out or retracting it into the adjustment unit 22, and the loosening of the tensioning element 24 being achieved by pulling it out of the adjustment unit 22. In a state in which the adjustment unit 22 is not actuated by the user, i.e. in a state in which it is not rotationally actuated, the adjustment unit 22 is configured to lock the relative movement between the tensioning element 24 and the adjustment unit 22. In other words, in this state, the tensioning element 24 is not pulled in or out of the adjustment unit 22.

[0068] As described above, the central portion 18 refers to a portion of the upper portion 14 that is separated from the lateral portion 16, as indicated by the dashed line 36 in Fig. 1. Specifically, the central portion 18 is provided to be disposed adjacent to or spaced apart from the adjustment mechanism 20. In other words, the central portion 18 extends from the adjustment mechanism 20, i.e., the dashed line 36, toward the center of the footwear 10 in the central direction Y'.

[0069] The central portion 18 of the upper part is designed such that it is adjustable, i.e. its circumferential length is variably adjustable. To do so, the central portion 18 is provided with an interruption along the circumferential direction. This interruption is constituted by two opposing parts 38 which are opposed to each other and which are circumferentially movable relative to each other. In other words, by increasing or decreasing the distance between the two opposing parts 38 of the central portion 18, the circumferential length of the upper part 14, i.e. its central portion 18, can be increased or decreased. The central portion is configured such that it is adjustable in its circumferential length independently of the actuation of the adjustment mechanism 20.

[0070] To adjust the desired circumferential length of the upper 14, fastening means in the form of laces (not shown) and correspondingly designed lace eyelets 40 are provided, which are configured to tension-resistantly connect the two opposing parts so as to prevent the two opposing parts from moving apart from each other in the circumferential direction. In other words, the fastening means of the central portion 18 is constituted by at least one lace which is connected to the two opposing parts of the central portion via the correspondingly designed lace eyelets 40. In this configuration, the fastening state of the fastening means can be set by tying at least one lace to the lace eyelet 40, for example by a shoe-tying knot, whereby the released state of the fastening means for allowing the adjustment of the circumferential length of the central portion 18 is provided by releasing or untying the lace.

[0071] With this configuration, footwear 10 is designed to be fastened or released independently of the fastening means releasing or locking the relative translational movement between tension element 24 and adjustment unit 22.

[0072] According to an alternative configuration, the adjustment mechanism can comprise a Bowden cable for force-fittingly connecting the adjustment unit to the tensioning element 24. In this configuration, the Bowden cable is made up of the tensioning element 24 and a pressure-resistant sleeve in which the tensioning element is guided. In particular, the pressure-resistant sleeve may be connected directly or pressure-resistantly to the adjustment unit 22.

[0073] FIG. 2 shows another configuration of the footwear 10, provided in the form of an open shoe, in particular a sandal. Compared to the configuration depicted in FIG. 1, the footwear 10 differs by the configuration of the central portion 18 of the upper 14. In particular, in the configuration shown in FIG. 2, the central portion 18 is constituted by a strap band 42 and a Velcro® connection 44. More particularly, the Velcro® connection 44 has a first end fastened to the lateral portion, in particular the lower surface of the lateral portion 16, and a correspondingly designed second end fastened to the strap band 42, in particular its upper surface. By providing the Velcro® connection 44, the central portion 18 of the upper 14 can be selectively engaged and disengaged, allowing adjustment of the circumferential length of the central portion 18 of the upper 14.

[0074] The insert sole, i.e., the upper layer of the sole 12, is provided with an open slot 46 that extends through its thickness from the first end 28 of the toe strap 26 to the forward end of the sole 12. With this arrangement, the insert sole 12 can be replaced without having to disconnect the tension element 24 from the toe strap 26, particularly its second end 30.

[0075] It will be obvious to those skilled in the art that these examples and items are merely examples of multiple possibilities. Therefore, the embodiments shown herein should not be understood to form limitations on these features and configurations. Any possible combination and configuration of the described features can be selected according to the scope of the present invention. [Explanation of symbols]

[0076] 10. Footwear 12 Sole 14 Upper part 16 Lateral side 18 Central part 20 Adjustment mechanism 22 Adjustment unit 24 Tension elements 26 Toe Strap 28 First end of toe strap 30 Second end of toe strap 32 Seat surface 34 Channels 36 Border 38 Opposite part of the central section 40 lace eyelets 42 Strap Band 44 Velcro® connection 46 Opening Slot

Claims

1. Footwear (10) for preventing or treating pathologies of a wearer's foot, particularly the joint connecting the first toe and the foot, comprising: - a toe strap (26) adapted to be fixed to the big toe; an upper part (14) adapted to be fixed in the midfoot region of the foot and comprising a lateral part (16) and a medial part (20); - an adjustment mechanism (20) coupled to said toe strap (26) and comprising a tensioning element (24), said adjustment mechanism (20) variably adjusting a pulling force applied to said toe strap (26), said pulling force being converted into a corrective force (F1, F2) acting on at least one of the joint and the first toe in a fastened state in which the footwear (10) is fastened to the foot, the adjustment mechanism (20) is at least partially disposed in or on the lateral portion (16) of the upper (14) and the tension element (24) is guided on the lateral side of the footwear (10); a central portion (18) of the upper (14) extends centrally from the adjustment mechanism (20) toward the center of the footwear (10) and has a circumferential length that is adjustable; the central portion (18) is configured such that its circumferential length is adjustable independently of operation of the adjustment mechanism (20); Footwear (10), wherein the adjustment mechanism (20) and the lateral portion (16) are designed such that the tension element (24) is guided inside the sole (12) of the footwear (10).

2. Footwear according to claim 1, wherein at least one of the lateral ends of the lateral portions (16) and the medial end of the medial portion (18) is fixed to the sole (12).

3. 3. The footwear of claim 1, wherein the toe strap has a first end fastened to a sole of the footwear and an opposing second end coupled to the tension element of the adjustment mechanism, the toe strap being disposed circumferentially around the big toe such that a wrap length of the toe strap around the big toe is adjustable when the footwear is in a fastened state by applying the tension to the toe strap.

4. Footwear according to any one of claims 1 to 3, wherein the toe strap (26) is configured to be placed around the big toe, the toe strap (26) extending from the side of the big toe along the outer surface of the foot to a medial side of the big toe and / or the joint portion.

5. Footwear according to any one of claims 1 to 4, wherein the tension element (24) is supported or guided in a lateral portion (16) of the upper (14), the tension element (24) being translatable relative to the lateral portion (16) along a longitudinal axis of the tension element (24).

6. Footwear as described in any one of claims 1 to 5, wherein the sole (12) has a channel (34) configured to support or guide the tension element (24) and / or the toe strap (26), and the tension element (24) and / or the toe strap (26) are capable of translational movement relative to the sole (12) along the longitudinal axis of the channel (34).

7. Footwear described in any one of claims 1 to 6, wherein the sole (12) is composed of multiple sole layers and the tension element (24) is guided via the outsole, or between the outsole and the insole, or between the insole and the insert sole.

8. Footwear according to any one of claims 1 to 7, wherein the central portion (18) of the upper (14) is disposed adjacent to or spaced apart from the adjustment mechanism (20).

9. Footwear according to any one of claims 1 to 8, wherein the adjustment mechanism (20) further comprises an adjustment unit (22) for selectively releasing or locking relative translational movement between the tensioning element (24) and the adjustment unit (22) along a longitudinal axis of the tensioning element (24) to variably adjust and set the tensioning force applied to the toe strap (26).

10. Footwear according to claim 9, wherein the central portion (18) comprises fastening means (40; 44) configured to connect two opposing portions (38) of the central portion (18) against tension, the two opposing portions (38) being circumferentially movable relative to one another in a released state of the fastening means (40; 44), the fastening means (40; 44) being fastened and / or released independently of the release and / or locking of the relative translational movement between the tension element (24) and the adjustment unit (22).

11. Footwear according to claim 10, wherein in a fastened state of the footwear (10) in which the adjustment mechanism (20) applies a pulling force to the toe strap (26), the adjustment mechanism (20) is designed to receive an additional pulling force counter to the pulling force applied to the toe strap (26), the additional pulling force being directed from the adjustment mechanism (20) through the central portion (18) into the sole (12) and exerting a pulling force on the fastening means (40; 44).

12. Footwear according to any one of claims 1 to 10, wherein the adjustment mechanism (20) comprises a Bowden cable connecting the adjustment unit (22) to the toe strap (26) with a force fit, the Bowden cable being composed of the tensioning element (24) and a pressure-resistant sleeve in which the tensioning element (24) is guided.

13. Footwear according to any one of claims 1 to 12, wherein the central portion (18) is constituted by a strap band (42) and a Velcro® connection (44) having a first end fastened to the lateral portion (16) and a correspondingly designed second end fastened to the strap band (42).

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