Heel cup and shoe

Abstract

A heel cup applied in a shoe is provided. The heel cup includes an inner surface and an outer surface. Each of the inner surface and the outer surface is a curved surface. The heel cup includes a first part and a second part connected along a longitudinal direction. The heel cup has a cross-section along the longitudinal direction, each cross-section has a shape of an arc. Each cross-section includes an upper arc and a lower arc connected along the longitudinal direction. When viewed from a side where the inner surface of the heel cup is located, the inner surface of the first part is convex, and the inner surface of the second part is concave. The upper arc has a first bending amplitude, and the lower arc has a second bending amplitude, wherein the first bending amplitude is greater than or equal to the second bending amplitude.

What is claimed is: 
     
         1 . A heel cup applied in a shoe, the heel cup comprising:
 an inner surface and an outer surface, the outer surface surrounding the inner surface, each of the inner surface and the outer surface being a curved surface;   a first part and a second part connected along a longitudinal direction of the heel cup, cross sections of the heel cup along the longitudinal direction being arc shaped, one of the cross sections along a central axis M of the heel cup along the longitudinal direction comprising an upper arc and a lower arc connected along the longitudinal direction, the first part corresponding to the upper arc, and the second part corresponding to the lower arc, wherein   when viewed from a side where the inner surface of the heel cup is located, the inner surface of the first part is a convex surface, and the inner surface of the second part is a concave surface;   the upper arc of the first part has a first bending amplitude, and the lower arc of the second part has a second bending amplitude, the first bending amplitude is greater than or equal to the second bending amplitude, wherein   the first bending amplitude is a distance between a midpoint of a first line connecting two ends of the upper arc and a midpoint of the upper arc, and the second bending amplitude is a distance between a midpoint of a second line connecting two ends of the lower arc and a midpoint of the lower arc.   
     
     
         2 . The heel cup of  claim 1 , wherein a top portion of the inner surface of the first part, away from the second part, is inclined towards the second part;
 the heel cup is compressible, the heel cup is configured to be in a first state or in a second state, the heel cup is in the first state when the heel cup is not compressed, and the heel cup is in the second state when the heel cup is compressed and elastically deformed; the heel cup is switchable between the first state and the second state;   to the heel cup switches from the first state to the second state a height of the heel cup along the longitudinal direction decreases, and a width of the second part, in a horizontal plane perpendicular to the longitudinal direction, increases.   
     
     
         3 . The heel cup of  claim 2 , wherein in the first state, a first angle is formed between a top portion of the inner surface of the first part, away from the second part, and an axis along the longitudinal direction, the first angle is an acute angle;
 in the second state, a second angle is formed between the top portion of the inner surface of the first part, away from the second part, and the axis along the longitudinal direction, the second angle is an acute angle and is greater than the first angle.   
     
     
         4 . The heel cup of  claim 1 , wherein the heel cup comprises at least one edge contour, the at least one edge contour defines a contour of the inner surface and a contour of the outer surface; the at least one edge contour comprises a first contour line in a horizontal plane direction and a second contour line intersecting with the horizontal plane direction, each of the first contour line and the second contour line is a curve;
 a distance between the inner surface and the outer surface is defined as a thickness of the heel cup;   except for portions of the heel cup comprising the at least one edge contour, the thickness of other portions of the heel cup is constant, the thickness of the portions of the heel cup comprising the at least one edge contour is less than the thickness of other portions of the heel cup.   
     
     
         5 . The heel cup of  claim 1 , wherein the heel cup further defines an opening, the opening extends through each of the inner surface and the outer surface;
 the opening is located in the second part, or the opening is mainly located in the second part and partially extends in the first part; or   the opening further extends from a side of the second part away from the first part, towards the first part.   
     
     
         6 . The heel cup of  claim 5 , wherein a height of the opening along the longitudinal direction is ⅓ to ½ of a height of the heel cup along the longitudinal direction; and a width of the opening along a horizontal plane direction is ⅓ to ½ of a width of heel cup along the horizontal plane direction, the horizontal plane direction is perpendicular to the longitudinal direction. 
     
     
         7 . The heel cup of  claim 1 , wherein the heel cup further defines a hollow pattern, the hollow pattern comprises a plurality of through holes spaced apart from each other, each of the plurality of through holes extends through each of the inner surface and the outer surface;
 each of the plurality of through holes is empty; or   at least one of plurality of through holes is filled with an additional material that is different from a material of the heel cup, the additional material has a better elasticity than that of the material of the heel cup.   
     
     
         8 . The heel cup of  claim 7 , wherein the heel cup comprises a top end and a bottom end opposite to the top end along the longitudinal direction,
 the heel cup further comprises a crossbeam part between the top end and the bottom end, the crossbeam part is an arc convex towards the top end, the plurality of through holes are distributed on opposite sides of the crossbeam part along the longitudinal direction;   the crossbeam part locates in the second part, or   the crossbeam part mainly locates in the second part and extends slightly in the first part.   
     
     
         9 . The heel cup of  claim 8 , wherein the heel cup further comprises at least one first sub-crossbeam part, each of the at least one first sub-crossbeam part is a solid portion of the heel cup between some of the plurality of through holes on a side of the crossbeam part adjacent to the bottom end;
 each of the at least one first sub-crossbeam part is arc convex towards the bottom end.   
     
     
         10 . The heel cup of  claim 8 , wherein the plurality of through holes comprises a first through hole and a second through hole on a side the crossbeam part adjacent to the top end and in a middle position of heel cup;
 the heel cup further comprises a second sub-crossbeam part, the second sub-crossbeam part is a solid portion between the first through hole and the second through hole;   the second sub-crossbeam part is an S-shaped arc along a direction perpendicular to the longitudinal direction.   
     
     
         11 . The heel cup of  claim 8 , wherein opening areas of the through holes on a side the crossbeam part adjacent to the top end gradually decreases from a middle of the heel cup to opposite sides of the heel cup;
 opening areas of the through holes on a side the crossbeam part adjacent to the bottom end gradually decreases from a middle of the heel cup to opposite sides of the heel cup.   
     
     
         12 . The heel cup of  claim 8 , wherein a material of the crossbeam part is different from a material of the heel cup, and a strength and an elasticity of the material of the crossbeam part are greater than those of the material of the heel cup. 
     
     
         13 . A shoe comprising:
 a sole,   an upper connected to the sole, the upper defining a shoe opening, and   a heel cup located at a back position of the upper, the heel cup comprising:   an inner surface and an outer surface, the outer surface surrounding the inner surface, and each of the inner surface and the outer surface being a curved surface;   a first part and a second part connected along a longitudinal direction of the heel cup, cross sections of the heel cup along the longitudinal direction being arc shaped, one of the cross sections along a central axis M of the heel cup along the longitudinal direction comprising an upper arc and a lower arc connected along the longitudinal direction, the first part corresponding to the upper arc, and the second part corresponding to the lower arc, wherein   when viewed from a side where the inner surface of the heel cup is located, the inner surface of the first part is a convex surface, and the inner surface of the second part is a concave surface;   the upper arc of the first part has a first bending amplitude, and the lower arc of the second part has a second bending amplitude, the first bending amplitude is greater than or equal to the second bending amplitude, wherein   the first bending amplitude is a distance between a midpoint of a first line connecting two ends of the upper arc and a midpoint of the upper arc, and the second bending amplitude is a distance between a midpoint of a second line connecting two ends of the lower arc and a midpoint of the lower arc.   
     
     
         14 . The shoe of  claim 13 , wherein a top portion of the inner surface of the first part away from the second part is inclined towards the second part;
 the heel cup is compressible, the heel cup is configured to be in a first state or in a second state, the heel cup is in the first state when the heel cup is not compressed, and the heel cup is in the second state when the heel cup is compressed and elastically deformed; the heel cup is switchable between the first state and the second state;   to the heel cup switches from the first state to the second state when the first part descends along the longitudinal direction, and a width of the second part, in a horizontal plane perpendicular to the longitudinal direction, increases to a preset amount.   
     
     
         15 . The shoe of  claim 13 , wherein in the first state, a first angle is formed between a top portion of the inner surface of the first part, away from the second part, and an axis along the longitudinal direction, the first angle is an acute angle;
 in the second state, a second angle is formed between the top portion of the inner surface of the first part, away from the second part, and the axis along the longitudinal direction, the second angle is an acute angle and is greater than the first angle.   
     
     
         16 . The shoe of  claim 13 , wherein the heel cup further defines an opening, the opening extends through both each of the inner surface and the outer surface;
 the opening is located in the second part, or the opening is mainly located in the second part and partially extends slightly in the first part.   
     
     
         17 . The shoe of  claim 13 , wherein the heel cup further defines a hollow pattern, the hollow pattern comprises a plurality of through holes spaced apart from each other, each of the plurality of through holes extends through both each of the inner surface and the outer surface;
 each of the plurality of through holes is empty; or   at least one of plurality of through holes is filled with an additional material that is different from a material of the heel cup, the additional material has a better elasticity than that of the material of the heel cup.   
     
     
         18 . The heel cup of  claim 17 , wherein the heel cup comprises a top end and a bottom end opposite to the top end along the longitudinal direction,
 the heel cup further comprises a crossbeam part between the top end and the bottom end, the crossbeam part is an arc convex towards the top end, the plurality of through holes are distributed on opposite sides of the crossbeam part along the longitudinal direction;   the crossbeam part locates in the second part, or   the crossbeam part mainly locates in the second part and extends slightly in the first part.   
     
     
         19 . The shoe of  claim 18 , wherein the heel cup further comprises at least one first sub-crossbeam part, each of the at least one first sub-crossbeam part is a solid portion of the heel cup between some of the plurality of through holes on a side of the crossbeam part adjacent to the bottom end;
 each of the at least one first sub-crossbeam part is arc convex towards the bottom end;   the plurality of through holes comprises a first through hole and a second through hole on a side the crossbeam part adjacent to the top end and in a middle position of heel cup;   the heel cup further comprises a second sub-crossbeam part, the second sub-crossbeam part is a solid portion between the first through hole and the second through hole;   the second sub-crossbeam part is an S-shaped arc along a direction perpendicular to the longitudinal direction.   
     
     
         20 . The shoe of  claim 18 , wherein, wherein opening areas of the through holes on a side the crossbeam part adjacent to the top end gradually decreases from a middle of the heel cup to opposite sides of the heel cup;
 opening areas of the through holes on a side the crossbeam part adjacent to the bottom end gradually decreases from a middle of the heel cup to opposite sides of the heel cup; or   a material of the crossbeam part is different from a material of the heel cup, a strength and an elasticity of the material of the crossbeam part are greater than those of the material of the heel cup.