Ankle joint orthosis
The invention relates to an ankle orthosis comprising a U-shaped support stirrup made of a flexible material, the sides of which stirrup converge beneath the foot in a web projecting as a tab toward the metatarsus, extend past the bones, and are held together at their end regions by a fastening strap wrapping around the leg. The tab has a convexity, which presses against the cuboid bone of the foot due to a preloading of the tab.
1. An ankle orthosis, comprising:
a U-shaped support stirrup for a user's foot made of a flexible material, and including inner and outer lateral sides which converge beneath the foot in a web, and a tab projecting forwardly from the web under the user's foot toward a metatarsus of the foot, and
a pair of fastening straps wrapping the support stirrup against a leg of the user,
wherein a portion of the tab adjacent to the outer lateral side of the support stirrup has a convex portion bulging upwardly in a shape of a portion of a sphere which presses against an underside of a cuboid bone of the foot due to a preloading of the tab.
2. The ankle orthosis according to claim 1 , wherein the tab is formed as a projection that extends toward a forefoot only under a portion of a sole of the user's foot which is adjacent to the outer lateral side of the support stirrup, terminates short of the metatarsus, and is flexible relative to the web.
3. The ankle orthosis according to claim 2 , wherein the tab and the web are made of different materials with different elasticity.
4. The ankle orthosis according to claim 2 , wherein the tab and the web are made as a single part, the tab is weakened relative to the web.
5. The ankle orthosis according to claim 2 , wherein each of the inner and outer lateral sides, the web, and the tab of the support stirrup has an inner side facing a body of the user that is covered by a padding material.
6. The ankle orthosis according to claim 2 , wherein the web has a length which extends far enough into the inner and outer lateral sides of the support stirrup so that the length is capable of being matched to a width of the foot of a particular user by bending the web relative to the inner and outer lateral sides.
7. The ankle orthosis according to claim 2 , wherein a pad is provided on an inner surface of the outer lateral side of the support stirrup.
8. The ankle orthosis according to claim 1 , wherein the tab and the web of the support stirrup are made of different materials with different elasticity.
9. The ankle orthosis according to claim 8 , wherein the web has a length which extends far enough into the inner and outer lateral sides of the support stirrup so that the length is capable of being matched to a width of the foot of a particular user by bending the web relative to the inner and outer lateral sides.
10. The ankle orthosis according to claim 1 , wherein the tab and the web are made as a single part, and the tab is weakened relative to the web.
11. The ankle orthosis according to claim 1 , wherein each of the inner and outer lateral sides, the web, and the tab of the support stirrup has an inner side facing a body of the user that is covered by a padding material.
12. The ankle orthosis according to claim 1 , wherein the web has a length which extends far enough into the inner and outer lateral sides of the support stirrup so that the length is capable of being matched to a width of the foot of a particular user by bending the web relative to the inner and outer lateral sides.
13. The ankle orthosis according to claim 1 , wherein a pad is provided on an inner surface of the outer lateral side of the support stirrup.
14. The ankle orthosis according to claim 13 , wherein one of the fastening straps is attached at a lower portion of the outer lateral side of the support stirrup, and wraps around the leg of the user in a manner so as to overlap a portion of the outer lateral side where the pad is provided.
15. The ankle orthosis according to claim 1 , wherein one of the fastening straps is attached to the support stirrup by a fastener located at a lower portion of the outer lateral side of the support stirrup.
16. The ankle orthosis according to claim 1 , wherein the inner and outer lateral sides of the support stirrup have different shapes.
17. The ankle orthosis according to claim 1 , wherein the tab is steadily thicker with increasing distance from the web, and thus is capable of providing a desired pressure on the cuboid bone of the foot.