Wedge, insole, and footwear sole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux

Abstract

A wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, having an elongated main body with a length greater than the length assembly comprising the hallux and metatarsophalangeal joint of a user, serving as a basis for at least the hallux and the metatarsophalangeal joint and configured to limit the dorsiflexion of the metatarsophalangeal joint, allowing free movement to the rest of the foot. An insole having an insole body and a removable wedge coupled to the insole body, and a footwear shoe sole having a sole and a removable wedge coupled to the sole of the footwear.

Description

CROSS REFERENCE TO RELATED APPLICATION

[0001] This Application claims the benefits of priority of U.S. Provisional Application No. 63 / 706,131, filed on Oct. 11, 2024, the content of which is incorporated herein by reference.FIELD OF THE INVENTION

[0002] The present invention belongs to the field of insoles and footwear, particularly to orthopedic or adapting and corrective elements used in insoles and footwear to prevent and correct certain injuries caused mainly by sports activities. The invention relates to different elements for limiting dorsiflexion of the metatarsophalangeal joint of the hallux.BACKGROUND OF THE INVENTION

[0003] Dorsiflexion is an anatomical term that describes an upward bending motion at a joint, reducing the angle between the dorsum (upper surface) of a body part and the adjacent structure. It is mainly used to refer to movements of the foot or hand. In the foot, dorsiflexion occurs when the toes move upward toward the shin, as in walking on the heels or lifting the foot upward. So, in dorsiflexion the toes point upward.

[0004] In this case, dorsiflexion refers to the flexion of the metatarsophalangeal joints of the toes produced when the toes move upward. The metatarsophalangeal joint of the hallux or first toe is the most prominent and commonly studied, as it bears a significant load during walking and running. For these reasons, it is also the most injured metatarsophalangeal joint due to certain sports activities.

[0005] Specifically, injury of to the metatarsophalangeal joint of the hallux, or first toe, is a recurring problem in American football players due to the explosive and fast nature of the sport. The physical demands of the sport, particularly on said metatarsophalangeal joint of the hallux, lead to excessive dorsiflexion that can lead to overload or injury, such as hyperextension or plantar tears. In addition to American football, there are other high intensity sports as basketball, and other activities or conditions of the daily life, where it should be necessary to prevent excessive dorsiflexion of the metatarsophalangeal joint of the hallux, in order to avoid injury risk.

[0006] It is therefore desirable an element that limits excessive dorsiflexion of the metatarsophalangeal joint of the hallux, avoiding risks of injuries such as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.SUMMARY OF THE INVENTION

[0007] The present invention relates to an innovative wedge, and an insole and a footwear sole specifically configured to house this wedge, for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, preventing and reducing the incidence of injuries associated as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.

[0008] One object of the present invention is a wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, this wedge comprising an elongated main body with a length greater than the length of the assembly comprising the hallux and the metatarsophalangeal joint of a user. This wedge is configured to, in use, be placed in a special insole designed to house this wedge, or in a footwear sole, just under the hallux and the metatarsophalangeal joint, serving as a basis for at least said hallux and said metatarsophalangeal joint, although it could be extended along the line of the hallux and the metatarsophalangeal joint. The wedge limits the dorsiflexion of said metatarsophalangeal joint, preventing excessive dorsiflexion of the metatarsophalangeal joint of the hallux. Due to the shape and configuration of the main body of the wedge, elongated and placed just under the line of the hallux and metatarsophalangeal joint, it limits only the dorsiflexion of said hallux and joint, allowing free movement to the rest of the foot.

[0009] Therefore, the proposed configuration of the wedge limits dorsiflexion of the first toe or hallux by means of an extended, rigid internal structure that acts as a stop or restrainer to prevent the toe from bending beyond a safe angle. This mechanism reduces the likelihood of injuries related to forced foot flexion or may even aid in rehabilitation once the injury has occurred.

[0010] According to a particular embodiment, the wedge comprises a transverse slit on the upper surface of the main body. It is placed in such a way that in use is approximately under the metatarsophalangeal joint. The slit has a longitudinal “V” cross section, and provides a determined flexion area of the wedge, to ease the flexion of the hallux together with the wedge. The degree of flexion provided by the wedge depends on the angle of the “V” cross section. The wider the angle, that is, the wider the separation of the slit on the surface, obviously the greater degree of flexion provided. In this way, using different wedges with different degrees of flexion provides the user with different degrees of limitation of the dorsiflexion according to different situations (trainings, high-level games, injury prevention or rehabilitation, etc. . . . ).

[0011] With reference to the above embodiment, the wedge may preferably include a flexible transverse piece insertable on the transverse slit and configured to fill said transverse slit. This transverse piece provides in the flexion area of the slit structural integrity without reducing the limitation of the dorsiflexion, and further it prevents discomfort caused by possible pinching on the foot of the user by the slit during use of the wedge.

[0012] The wedge, including the main body and the transverse piece, if any, may be made of a material selected from thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof. These different materials provide different degrees of flexibility, which affects the limitation of the dorsiflexion. So, using different wedges, in this case made of different materials, provides the user also with different limitations of the dorsiflexion to adapt to different situations and requirements.

[0013] Therefore, the wedges object of the present invention provide the following technical effects and advantages:

[0014] Injury prevention or rehabilitation of injuries already produced: by limiting dorsiflexion of the hallux, the wedge reduces the possibility of hyperextension or plantar tears, especially in American football or basketball players, although it can also be applied to other contexts and situations.

[0015] Improved performance: control over foot mobility provides the athlete or player with greater stability during explosive movements.

[0016] Adjustable customization: the versatility of the interchangeable wedges allows them to be adapted to the specific needs of the user, differentiating it from current solutions that offer limited and standardized control.

[0017] Advantages over current solutions: currently, solutions for this type of injury include the use of carbon fiber insoles with a Morton-type elongation. While these insoles stiffen the whole area of the foot, they do not offer the possibility of adjusting the flexion graduation, which limits their effectiveness for athletes with different degrees of injury or prevention needs. The present invention offers a more advanced and customizable solution, improving both prevention and rehabilitation.

[0018] Another object of the invention is an insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, being the insole attachable to and removable from a footwear. The insole comprises an insole body and a wedge as disclosed above coupled to a housing of the insole body. The wedge is removable from the insole body, so a set of different wedges made of different materials, or with different degrees of flexion due to a slit will provide the user different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion. So, these interchangeable wedges are adjustable inserts that allow modulating the amount of flexion allowed in the metatarsophalangeal joint.

[0019] With accord to different embodiments of the invention, the wedge may be coupled to the insole body in different ways and positions, for example, coupled to the bottom of the insole body and levelled with said bottom of the insole body, or alternatively coupled to the upper part of the insole body and levelled with said upper part of the insole body.

[0020] Regardless of the materials of the wedge, the insole body can be made of different materials, as thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof, to provide different degrees of flexibility and comfort. The insole body can be manufactured in either a generic or customized format, adapting to the specific needs of the user and providing a solution tailored to different contexts or activities.

[0021] Therefore, the insole can incorporate or house interchangeable different wedges that limit the range of dorsiflexion of the metatarsophalangeal joint, customizing the level of restriction. This system allows for unprecedented adaptability, improving both injury prevention and athletic performance.

[0022] Unlike current solutions, which employ carbon fiber insoles to restrict motion of the whole foot, without providing precise control over the degree of flexion, the insole of the present invention includes an interchangeable wedge system that allows the level of restriction to be adjusted according to the user's needs. The wedges are designed to be customized with varying degrees of stiffness and flexibility, providing the user with the ability to modify the mobility of their first toe or hallux according to their preferences or protection requirements.

[0023] Another object of the invention is a footwear sole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, having a wedge as disclosed above. The wedge is coupled to a housing of the upper part of the sole, being levelled with said upper part of the sole. The wedge is removable from the sole, so a set of different wedges made of different materials, or with different degrees of flexion due to a slit will provide the user with different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion. The upper part of the sole with the housing and the wedge is covered by an insole for footwear.

[0024] The upper part of the footwear sole including the housing for the wedge can be made of different materials, as thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof, to provide different degrees of flexibility and comfort.

[0025] Similarly to the insole disclosed above, the upper part of the footwear sole can incorporate interchangeable wedges that limit the range of dorsiflexion of the metatarsophalangeal joint, customizing the level of restriction. This system allows for unprecedented adaptability, improving both injury prevention and athletic performance.

[0026] The upper part of the footwear sole includes an interchangeable wedge system that allows the level of restriction to be adjusted according to the user's needs. The wedges are designed to be customized with varying degrees of stiffness and flexibility, giving the user the ability to modify the mobility of their first toe or hallux according to their preferences or protection requirements.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Next, in order to facilitate the comprehension of this disclosure, in an illustrative rather than limitative manner a series of embodiments with reference to a series of figures shall be made below.

[0028] FIG. 1 is a bottom view of an embodiment of a wedge object of the present invention in an extended position, showing the configuration thereof including a slit with “V-shaped” cross section.

[0029] FIG. 2 shows a lateral view of the wedge of FIG. 1 in an extended position.

[0030] FIG. 3 shows a lateral view of the wedge of FIGS. 1 and 2, in this case in a flexed position.

[0031] FIGS. 4a and 4b show a set of different wedges including slits with “V-shaped” cross section having different angles and providing different degrees of flexion. FIG. 4a is an upper perspective view. FIG. 4b is a lateral perspective view.

[0032] FIG. 5 shows a lateral section view of an embodiment of an insole object of the present invention with a wedge coupled.

[0033] FIG. 6 shows a rear section view of the insole of FIG. 5.

[0034] FIG. 7 is a bottom plan view of the insole including the wedge of FIGS. 5 and 6 coupled.

[0035] FIG. 8 is a top perspective view of an insole and the wedge removed and separated from the insole.

[0036] FIG. 9 shows a lateral view of the insole and the wedge of FIG. 8 separated.

[0037] FIG. 10 shows the bones of a foot placed on an insole with a wedge object of the invention, in an extended position.

[0038] FIG. 11 is a detailed view of the bones of the foot and the insole of FIG. 10, showing the hallux and metatarsophalangeal joint in detail, in a low degree flexion.

[0039] FIG. 12 is the detailed view of FIG. 11 but in this case in a high degree flexion.

[0040] FIG. 13 is a lateral section view of a footwear sole object of the present invention including a wedge coupled.

[0041] FIG. 14 is an upper perspective view of the footwear sole of FIG. 13 with the wedge coupled.

[0042] FIG. 15 is a bottom perspective view of the footwear sole of FIG. 14 with the wedge removed and separated from the sole.

[0043] FIGS. 16a and 16b show a perspective view of a particular embodiment of a wedge of the present invention including a transverse slit and a transverse piece for the slit. FIG. 16a shows the transverse piece removed and separated from the slit. FIG. 16b shows the transverse piece inserted in the transverse slit.

[0044] These figures refer to the following set of elements:

[0045] 1. foot

[0046] 2. hallux

[0047] 3. metatarsophalangeal joint

[0048] 4. wedge

[0049] 5. main body of the wedge

[0050] 6. transverse slit of the wedge

[0051] 7. transverse piece of the wedge

[0052] 8. insole

[0053] 9. insole body

[0054] 10. housing

[0055] 11. footwear soleDETAILED DESCRIPTION OF THE INVENTION

[0056] The present disclosure relates to a wedge 4, an insole 8 and a footwear sole 11 specifically configured to limit dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of a foot 1, preventing and reducing the incidence of injuries associated as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.

[0057] One object of the present invention is a wedge 4 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of the foot 1.

[0058] As it can be seen in the figures, the wedge 4 has an elongated main body 5, which has a length greater than the total length of the hallux 2 and metatarsophalangeal joint 3 assembly of the foot 1 a user. This wedge 4 has a shape approximately similar to the assembly of hallux 2 and metatarsophalangeal joint 3, and it is configured to, in use, be placed in an insole that can be generic or customized for the user, or in a footwear sole, just under said hallux 2 and metatarsophalangeal joint 3. Therefore, this wedge 4 serves as a basis for at least the hallux 2 and the metatarsophalangeal joint 3, although it could be extended along the line of said hallux 2 and metatarsophalangeal joint 3. Some embodiments of the wedge 4 are shown in FIGS. 1 to 6. According to this configuration, the wedge 4 limits the dorsiflexion of the metatarsophalangeal joint 3, preventing excessive dorsiflexion of this metatarsophalangeal joint 3 of the hallux 2. FIGS. 10 to 12 show the position and flexion of the foot over a wedge 4. Due to the shape and configuration of the main body 5 of the wedge 4, elongated and placed just under the line of the hallux 2 and metatarsophalangeal joint 3, it limits only the dorsiflexion of said hallux 2 and joint 3, allowing free movement to the rest of the foot 1.

[0059] According to a particular embodiment, the wedge 4 has a transverse slit 6 on the upper surface of the main body 5 thereof. In use it is placed approximately under the metatarsophalangeal joint 3. As it can be seen in the figures, the transverse slit 6 has a longitudinal “V” cross section, and provides a determined flexion area of the wedge 4, to ease the flexion of the hallux 1 together with the wedge 4. The degree of flexion provided by the wedge 4 depends on the angle of this “V” cross section. Although any angle can be performed, it preferably will be between 0° and 60°. The wider the angle, that is, the wider the separation of the slit 6 on the surface, obviously the greater degree of flexion provided. In this way, using different wedges 4 with different degrees of flexion provides the user with different degrees of limitation of the dorsiflexion according to different situations (trainings, high-level games, prevention or rehabilitation of injuries, etc. . . . ). FIGS. 4a and 4b show a set of different wedges including slits with “V-shaped” cross section having different angles and providing different degrees of flexion.

[0060] According to a preferred embodiment, the wedge 4 may preferably include a flexible transverse piece 7 insertable on the transverse slit 6 and configured to fill said transverse slit 6 in whole, or at least partially. This transverse piece 7 provides in the flexion area of the slit 6 structural integrity without reducing the limitation of the dorsiflexion, and further it prevents discomfort caused by possible pinching on the foot 1 of the user by the slit 6 during use of the wedge 4.

[0061] The wedge 4, including the main body 5 and the transverse piece 7, if any, may be made of a material selected from thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof. These different materials provide different degrees of flexibility, which affects the limitation of the dorsiflexion. Therefore, using different wedges 4 made of different materials provides the user also with different limitations of the dorsiflexion to adapt to different situations and requirements.

[0062] Another object of the invention, as shown mainly in FIGS. 5 to 9 is an insole 8 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of the foot 1. The insole 8 comprises an insole body 9 and a wedge4 as disclosed above, coupled to a housing 10 of the insole body 9. The wedge 4 is removable from the insole body 9, so a set of different wedges 4 made of different materials, or with different degrees of flexion due to a slit 6 will provide the user with different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion.

[0063] The wedge 4 may be coupled to the insole body 9 in different ways, for example, coupled to the bottom of the insole body 9 and levelled with said bottom, or alternatively coupled to the upper part of the insole body 9 and levelled with said upper part.

[0064] The insole body 9 can be made of different materials, as thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof, to provide different degrees of flexibility and comfort. The insole body 9 can be manufactured in either a generic or customized format, adapting to the specific needs of the user and providing a solution tailored to different contexts or activities.

[0065] According to different embodiments of the invention, the insole may have a flap at the front end and a flap at the rear end to ensure fixation and to prevent it from slipping from the footwear. Additionally, the insole may have a flap at each lateral side to provide lateral stability to the insole.

[0066] Another object of the invention, as mainly disclosed in FIGS. 13 to 15, is a footwear sole 11 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of a foot 1, the sole 11 having a wedge 4 as disclosed above. The wedge 4 is coupled to a housing 10 of the upper part of the footwear sole 11, being levelled with said upper part. The wedge 4 is removable from the footwear sole 11, so a set of different wedges 4 made of different materials, or with different degrees of flexion due to a slit 6 will provide the user different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion.

Examples

Embodiment Construction

[0056]The present disclosure relates to a wedge 4, an insole 8 and a footwear sole 11 specifically configured to limit dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of a foot 1, preventing and reducing the incidence of injuries associated as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.

[0057]One object of the present invention is a wedge 4 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of the foot 1.

[0058]As it can be seen in the figures, the wedge 4 has an elongated main body 5, which has a length greater than the total length of the hallux 2 and metatarsophalangeal joint 3 assembly of the foot 1 a user. This wedge 4 has a shape approximately similar to the assembly of hallux 2 and metatarsophalangeal joint 3, and it is configured to, in use, be placed in an insole that can be generic or customized for the user, or in a footwear sole, just under said hallux 2 and me...

CROSS REFERENCE TO RELATED APPLICATION

[0001] This Application claims the benefits of priority of U.S. Provisional Application No. 63 / 706,131, filed on Oct. 11, 2024, the content of which is incorporated herein by reference.FIELD OF THE INVENTION

[0002] The present invention belongs to the field of insoles and footwear, particularly to orthopedic or adapting and corrective elements used in insoles and footwear to prevent and correct certain injuries caused mainly by sports activities. The invention relates to different elements for limiting dorsiflexion of the metatarsophalangeal joint of the hallux.BACKGROUND OF THE INVENTION

[0003] Dorsiflexion is an anatomical term that describes an upward bending motion at a joint, reducing the angle between the dorsum (upper surface) of a body part and the adjacent structure. It is mainly used to refer to movements of the foot or hand. In the foot, dorsiflexion occurs when the toes move upward toward the shin, as in walking on the heels or lifting the foot upward. So, in dorsiflexion the toes point upward.

[0004] In this case, dorsiflexion refers to the flexion of the metatarsophalangeal joints of the toes produced when the toes move upward. The metatarsophalangeal joint of the hallux or first toe is the most prominent and commonly studied, as it bears a significant load during walking and running. For these reasons, it is also the most injured metatarsophalangeal joint due to certain sports activities.

[0005] Specifically, injury of to the metatarsophalangeal joint of the hallux, or first toe, is a recurring problem in American football players due to the explosive and fast nature of the sport. The physical demands of the sport, particularly on said metatarsophalangeal joint of the hallux, lead to excessive dorsiflexion that can lead to overload or injury, such as hyperextension or plantar tears. In addition to American football, there are other high intensity sports as basketball, and other activities or conditions of the daily life, where it should be necessary to prevent excessive dorsiflexion of the metatarsophalangeal joint of the hallux, in order to avoid injury risk.

[0006] It is therefore desirable an element that limits excessive dorsiflexion of the metatarsophalangeal joint of the hallux, avoiding risks of injuries such as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.SUMMARY OF THE INVENTION

[0007] The present invention relates to an innovative wedge, and an insole and a footwear sole specifically configured to house this wedge, for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, preventing and reducing the incidence of injuries associated as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.

[0008] One object of the present invention is a wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, this wedge comprising an elongated main body with a length greater than the length of the assembly comprising the hallux and the metatarsophalangeal joint of a user. This wedge is configured to, in use, be placed in a special insole designed to house this wedge, or in a footwear sole, just under the hallux and the metatarsophalangeal joint, serving as a basis for at least said hallux and said metatarsophalangeal joint, although it could be extended along the line of the hallux and the metatarsophalangeal joint. The wedge limits the dorsiflexion of said metatarsophalangeal joint, preventing excessive dorsiflexion of the metatarsophalangeal joint of the hallux. Due to the shape and configuration of the main body of the wedge, elongated and placed just under the line of the hallux and metatarsophalangeal joint, it limits only the dorsiflexion of said hallux and joint, allowing free movement to the rest of the foot.

[0009] Therefore, the proposed configuration of the wedge limits dorsiflexion of the first toe or hallux by means of an extended, rigid internal structure that acts as a stop or restrainer to prevent the toe from bending beyond a safe angle. This mechanism reduces the likelihood of injuries related to forced foot flexion or may even aid in rehabilitation once the injury has occurred.

[0010] According to a particular embodiment, the wedge comprises a transverse slit on the upper surface of the main body. It is placed in such a way that in use is approximately under the metatarsophalangeal joint. The slit has a longitudinal “V” cross section, and provides a determined flexion area of the wedge, to ease the flexion of the hallux together with the wedge. The degree of flexion provided by the wedge depends on the angle of the “V” cross section. The wider the angle, that is, the wider the separation of the slit on the surface, obviously the greater degree of flexion provided. In this way, using different wedges with different degrees of flexion provides the user with different degrees of limitation of the dorsiflexion according to different situations (trainings, high-level games, injury prevention or rehabilitation, etc. . . . ).

[0011] With reference to the above embodiment, the wedge may preferably include a flexible transverse piece insertable on the transverse slit and configured to fill said transverse slit. This transverse piece provides in the flexion area of the slit structural integrity without reducing the limitation of the dorsiflexion, and further it prevents discomfort caused by possible pinching on the foot of the user by the slit during use of the wedge.

[0012] The wedge, including the main body and the transverse piece, if any, may be made of a material selected from thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof. These different materials provide different degrees of flexibility, which affects the limitation of the dorsiflexion. So, using different wedges, in this case made of different materials, provides the user also with different limitations of the dorsiflexion to adapt to different situations and requirements.

[0013] Therefore, the wedges object of the present invention provide the following technical effects and advantages:

[0014] Injury prevention or rehabilitation of injuries already produced: by limiting dorsiflexion of the hallux, the wedge reduces the possibility of hyperextension or plantar tears, especially in American football or basketball players, although it can also be applied to other contexts and situations.

[0015] Improved performance: control over foot mobility provides the athlete or player with greater stability during explosive movements.

[0016] Adjustable customization: the versatility of the interchangeable wedges allows them to be adapted to the specific needs of the user, differentiating it from current solutions that offer limited and standardized control.

[0017] Advantages over current solutions: currently, solutions for this type of injury include the use of carbon fiber insoles with a Morton-type elongation. While these insoles stiffen the whole area of the foot, they do not offer the possibility of adjusting the flexion graduation, which limits their effectiveness for athletes with different degrees of injury or prevention needs. The present invention offers a more advanced and customizable solution, improving both prevention and rehabilitation.

[0018] Another object of the invention is an insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, being the insole attachable to and removable from a footwear. The insole comprises an insole body and a wedge as disclosed above coupled to a housing of the insole body. The wedge is removable from the insole body, so a set of different wedges made of different materials, or with different degrees of flexion due to a slit will provide the user different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion. So, these interchangeable wedges are adjustable inserts that allow modulating the amount of flexion allowed in the metatarsophalangeal joint.

[0019] With accord to different embodiments of the invention, the wedge may be coupled to the insole body in different ways and positions, for example, coupled to the bottom of the insole body and levelled with said bottom of the insole body, or alternatively coupled to the upper part of the insole body and levelled with said upper part of the insole body.

[0020] Regardless of the materials of the wedge, the insole body can be made of different materials, as thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof, to provide different degrees of flexibility and comfort. The insole body can be manufactured in either a generic or customized format, adapting to the specific needs of the user and providing a solution tailored to different contexts or activities.

[0021] Therefore, the insole can incorporate or house interchangeable different wedges that limit the range of dorsiflexion of the metatarsophalangeal joint, customizing the level of restriction. This system allows for unprecedented adaptability, improving both injury prevention and athletic performance.

[0022] Unlike current solutions, which employ carbon fiber insoles to restrict motion of the whole foot, without providing precise control over the degree of flexion, the insole of the present invention includes an interchangeable wedge system that allows the level of restriction to be adjusted according to the user's needs. The wedges are designed to be customized with varying degrees of stiffness and flexibility, providing the user with the ability to modify the mobility of their first toe or hallux according to their preferences or protection requirements.

[0023] Another object of the invention is a footwear sole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux, having a wedge as disclosed above. The wedge is coupled to a housing of the upper part of the sole, being levelled with said upper part of the sole. The wedge is removable from the sole, so a set of different wedges made of different materials, or with different degrees of flexion due to a slit will provide the user with different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion. The upper part of the sole with the housing and the wedge is covered by an insole for footwear.

[0024] The upper part of the footwear sole including the housing for the wedge can be made of different materials, as thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof, to provide different degrees of flexibility and comfort.

[0025] Similarly to the insole disclosed above, the upper part of the footwear sole can incorporate interchangeable wedges that limit the range of dorsiflexion of the metatarsophalangeal joint, customizing the level of restriction. This system allows for unprecedented adaptability, improving both injury prevention and athletic performance.

[0026] The upper part of the footwear sole includes an interchangeable wedge system that allows the level of restriction to be adjusted according to the user's needs. The wedges are designed to be customized with varying degrees of stiffness and flexibility, giving the user the ability to modify the mobility of their first toe or hallux according to their preferences or protection requirements.BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Next, in order to facilitate the comprehension of this disclosure, in an illustrative rather than limitative manner a series of embodiments with reference to a series of figures shall be made below.

[0028] FIG. 1 is a bottom view of an embodiment of a wedge object of the present invention in an extended position, showing the configuration thereof including a slit with “V-shaped” cross section.

[0029] FIG. 2 shows a lateral view of the wedge of FIG. 1 in an extended position.

[0030] FIG. 3 shows a lateral view of the wedge of FIGS. 1 and 2, in this case in a flexed position.

[0031] FIGS. 4a and 4b show a set of different wedges including slits with “V-shaped” cross section having different angles and providing different degrees of flexion. FIG. 4a is an upper perspective view. FIG. 4b is a lateral perspective view.

[0032] FIG. 5 shows a lateral section view of an embodiment of an insole object of the present invention with a wedge coupled.

[0033] FIG. 6 shows a rear section view of the insole of FIG. 5.

[0034] FIG. 7 is a bottom plan view of the insole including the wedge of FIGS. 5 and 6 coupled.

[0035] FIG. 8 is a top perspective view of an insole and the wedge removed and separated from the insole.

[0036] FIG. 9 shows a lateral view of the insole and the wedge of FIG. 8 separated.

[0037] FIG. 10 shows the bones of a foot placed on an insole with a wedge object of the invention, in an extended position.

[0038] FIG. 11 is a detailed view of the bones of the foot and the insole of FIG. 10, showing the hallux and metatarsophalangeal joint in detail, in a low degree flexion.

[0039] FIG. 12 is the detailed view of FIG. 11 but in this case in a high degree flexion.

[0040] FIG. 13 is a lateral section view of a footwear sole object of the present invention including a wedge coupled.

[0041] FIG. 14 is an upper perspective view of the footwear sole of FIG. 13 with the wedge coupled.

[0042] FIG. 15 is a bottom perspective view of the footwear sole of FIG. 14 with the wedge removed and separated from the sole.

[0043] FIGS. 16a and 16b show a perspective view of a particular embodiment of a wedge of the present invention including a transverse slit and a transverse piece for the slit. FIG. 16a shows the transverse piece removed and separated from the slit. FIG. 16b shows the transverse piece inserted in the transverse slit.

[0044] These figures refer to the following set of elements:

[0045] 1. foot

[0046] 2. hallux

[0047] 3. metatarsophalangeal joint

[0048] 4. wedge

[0049] 5. main body of the wedge

[0050] 6. transverse slit of the wedge

[0051] 7. transverse piece of the wedge

[0052] 8. insole

[0053] 9. insole body

[0054] 10. housing

[0055] 11. footwear soleDETAILED DESCRIPTION OF THE INVENTION

[0056] The present disclosure relates to a wedge 4, an insole 8 and a footwear sole 11 specifically configured to limit dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of a foot 1, preventing and reducing the incidence of injuries associated as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.

[0057] One object of the present invention is a wedge 4 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of the foot 1.

[0058] As it can be seen in the figures, the wedge 4 has an elongated main body 5, which has a length greater than the total length of the hallux 2 and metatarsophalangeal joint 3 assembly of the foot 1 a user. This wedge 4 has a shape approximately similar to the assembly of hallux 2 and metatarsophalangeal joint 3, and it is configured to, in use, be placed in an insole that can be generic or customized for the user, or in a footwear sole, just under said hallux 2 and metatarsophalangeal joint 3. Therefore, this wedge 4 serves as a basis for at least the hallux 2 and the metatarsophalangeal joint 3, although it could be extended along the line of said hallux 2 and metatarsophalangeal joint 3. Some embodiments of the wedge 4 are shown in FIGS. 1 to 6. According to this configuration, the wedge 4 limits the dorsiflexion of the metatarsophalangeal joint 3, preventing excessive dorsiflexion of this metatarsophalangeal joint 3 of the hallux 2. FIGS. 10 to 12 show the position and flexion of the foot over a wedge 4. Due to the shape and configuration of the main body 5 of the wedge 4, elongated and placed just under the line of the hallux 2 and metatarsophalangeal joint 3, it limits only the dorsiflexion of said hallux 2 and joint 3, allowing free movement to the rest of the foot 1.

[0059] According to a particular embodiment, the wedge 4 has a transverse slit 6 on the upper surface of the main body 5 thereof. In use it is placed approximately under the metatarsophalangeal joint 3. As it can be seen in the figures, the transverse slit 6 has a longitudinal “V” cross section, and provides a determined flexion area of the wedge 4, to ease the flexion of the hallux 1 together with the wedge 4. The degree of flexion provided by the wedge 4 depends on the angle of this “V” cross section. Although any angle can be performed, it preferably will be between 0° and 60°. The wider the angle, that is, the wider the separation of the slit 6 on the surface, obviously the greater degree of flexion provided. In this way, using different wedges 4 with different degrees of flexion provides the user with different degrees of limitation of the dorsiflexion according to different situations (trainings, high-level games, prevention or rehabilitation of injuries, etc. . . . ). FIGS. 4a and 4b show a set of different wedges including slits with “V-shaped” cross section having different angles and providing different degrees of flexion.

[0060] According to a preferred embodiment, the wedge 4 may preferably include a flexible transverse piece 7 insertable on the transverse slit 6 and configured to fill said transverse slit 6 in whole, or at least partially. This transverse piece 7 provides in the flexion area of the slit 6 structural integrity without reducing the limitation of the dorsiflexion, and further it prevents discomfort caused by possible pinching on the foot 1 of the user by the slit 6 during use of the wedge 4.

[0061] The wedge 4, including the main body 5 and the transverse piece 7, if any, may be made of a material selected from thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof. These different materials provide different degrees of flexibility, which affects the limitation of the dorsiflexion. Therefore, using different wedges 4 made of different materials provides the user also with different limitations of the dorsiflexion to adapt to different situations and requirements.

[0062] Another object of the invention, as shown mainly in FIGS. 5 to 9 is an insole 8 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of the foot 1. The insole 8 comprises an insole body 9 and a wedge4 as disclosed above, coupled to a housing 10 of the insole body 9. The wedge 4 is removable from the insole body 9, so a set of different wedges 4 made of different materials, or with different degrees of flexion due to a slit 6 will provide the user with different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion.

[0063] The wedge 4 may be coupled to the insole body 9 in different ways, for example, coupled to the bottom of the insole body 9 and levelled with said bottom, or alternatively coupled to the upper part of the insole body 9 and levelled with said upper part.

[0064] The insole body 9 can be made of different materials, as thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof, to provide different degrees of flexibility and comfort. The insole body 9 can be manufactured in either a generic or customized format, adapting to the specific needs of the user and providing a solution tailored to different contexts or activities.

[0065] According to different embodiments of the invention, the insole may have a flap at the front end and a flap at the rear end to ensure fixation and to prevent it from slipping from the footwear. Additionally, the insole may have a flap at each lateral side to provide lateral stability to the insole.

[0066] Another object of the invention, as mainly disclosed in FIGS. 13 to 15, is a footwear sole 11 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of a foot 1, the sole 11 having a wedge 4 as disclosed above. The wedge 4 is coupled to a housing 10 of the upper part of the footwear sole 11, being levelled with said upper part. The wedge 4 is removable from the footwear sole 11, so a set of different wedges 4 made of different materials, or with different degrees of flexion due to a slit 6 will provide the user different degrees of dorsiflexion to be adapted to different circumstances and requirements of flexion.

Examples

Embodiment Construction

[0056]The present disclosure relates to a wedge 4, an insole 8 and a footwear sole 11 specifically configured to limit dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of a foot 1, preventing and reducing the incidence of injuries associated as hyperextension or plantar tears, or limiting mobility to improve the recovery process once the injury has occurred.

[0057]One object of the present invention is a wedge 4 for limiting dorsiflexion of the metatarsophalangeal joint 3 of the hallux 2 of the foot 1.

[0058]As it can be seen in the figures, the wedge 4 has an elongated main body 5, which has a length greater than the total length of the hallux 2 and metatarsophalangeal joint 3 assembly of the foot 1 a user. This wedge 4 has a shape approximately similar to the assembly of hallux 2 and metatarsophalangeal joint 3, and it is configured to, in use, be placed in an insole that can be generic or customized for the user, or in a footwear sole, just under said hallux 2 and me...

Claims

1. A wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux of a foot comprising an elongated main body having a length greater than the length of an assembly comprising the hallux and the metatarsophalangeal joint of a user, and configured to in use be placed in an insole or in a footwear sole, just under said hallux and the metatarsophalangeal joint, serving as a basis for at least said hallux and the metatarsophalangeal joint and configured to limit the dorsiflexion of said metatarsophalangeal joint, allowing free movement to the rest of the foot.

2. The wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 1, comprising a transverse slit on the upper surface of the main body, placed in use under the metatarsophalangeal joint, and having a longitudinal “V” cross section, said transverse slit providing a determined flexion area of the wedge, the degree of flexion depending on the angle of the “V” cross section.

3. The wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 2, comprising a flexible transverse piece insertable on the transverse slit and configured to fill said transverse slit.

4. The wedge for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 1, made of a material selected from the group consisting of thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof.

5. An insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux comprising an insole body and a wedge according to claim 1 coupled to a housing of the insole body, the wedge being removable from the insole body.

6. The insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 5, wherein the wedge is coupled to the bottom of the insole body and is levelled with said bottom of the insole body.

7. The insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 5, wherein the wedge is coupled to the upper part of the insole body and is levelled with said upper part of the insole body.

8. The insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 5, wherein the insole body is made of a material selected from the group consisting of thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof.

9. The insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 5, comprising a flap at a front end and a flap at a rear end configured to ensure fixation and to prevent from slipping from a footwear.

10. The insole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 5, comprising a flap at each lateral side configured to provide lateral stability to the insole.

11. A footwear sole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux comprising a wedge according to claim 1 coupled to a housing of an upper part of the sole and is levelled with said upper part of the sole, the wedge being removable from the sole.

12. The footwear sole for limiting dorsiflexion of the metatarsophalangeal joint of the hallux according to claim 11, wherein the upper part of the sole is made of a material selected from the group consisting of thermoplastic polyurethane, polyamides, carbon fibers, and combination thereof.

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