Shoe, in particular sports shoe, with internal shock-absorbing element for the heel
A shoe, in particular a sports shoe, includes an inner sole and an outer sole the heel part of which, hollowed out with an opening oriented upwards, includes an internal shock-absorbing element, which is preferably formed as a single block with the outer sole. This shock-absorbing element has a hollow tubular open configuration, the annular section of which is not of constant thickness over all of its height, locally presenting a zone of reduced thickness, from which preferably the deformation by flexing of the shock-absorbing element occurs. Preferably, it has an outer wall that is perpendicular to the general pressure plane of the outer sole and an inner wall with a concave curvature.
1. A sports shoe, comprising:
an inner sole and an outer sole;
a hollow heel part with an opening facing upwards and including an internal shock-absorbing element,
wherein the shock-absorbing element, forms a single block with the outer sole, has a hollow tubular open configuration, and an annular section, having an overall height which is not of constant thickness over all of its height thereof so that it locally presents a zone of reduced thickness where flexing of the shock-absorbing element occurs by deformation.
2. A shoe according to claim 1 , wherein an outer wall of the shock-absorbing element is perpendicular to a general pressure plane of the outer sole and an inner wall thereof has a concave curvature.
3. A shoe according to claim 2 , wherein a radius of curvature of the concave inner wall is 6 to 10 mm.
4. A shoe according to claim 1 , wherein the opening of the tubular shock-absorbing element is directed upwards, and the shoe includes a flexible disk comprised of a plastic or rubber material that at least partially closes off the opening of the heel part and rests on the top edge of the shock-absorbing element.
5. A shoe according to claim 4 , wherein a portion of the outer sole comprises a bottom of the shock-absorbing element and has a concave configuration.
6. A shoe according to claim 4 , wherein a portion of the outer sole comprises a bottom of the shock-absorbing element and is displaced in height in relation to a general pressure plane of the said outer sole.
7. A shoe according to claim 4 , wherein the flexible disk is a plastic material and is pierced with at least one through hole.
8. A shoe according to claim 4 , wherein the shock-absorbing element has a height measured at its outer wall of 13 to 15 mm, a thickness of 4 to 5 mm at its top edge, and a thickness of 2 to 3 mm in the zone of reduced thickness.
9. A shoe according to claim 8 , wherein the zone of reduced thickness is at a distance from the top edge of the shock-absorbing element of 5 to 6 mm.
10. A shoe according to claim 4 , wherein the flexible disk is rubber and has a thickness of 3 mm.
11. A shoe according to claim 4 , wherein a junction between a portion of the outer sole comprising a bottom of the shock-absorbing element and a base of the outer sole has a thickness of, or less than, the thickness of the zone of reduced thickness of the shock-absorbing element.