Sole rebound cushioning structure and sole

Abstract

The utility model discloses a sole springback cushioning structure and a sole, the sole springback cushioning structure comprises at least one support layer, the support layer is formed by connecting a plurality of unit cells in the horizontal direction, and each unit cell is composed of four lattice units which are the same in shape and size and are spatially located in four orthogonal areas; the four crystal lattice units are connected into a whole at the central position of the unit cell and form a first connecting part, each crystal lattice unit comprises a base body located at the horizontal position and a supporting arm located at the vertical position, and the end parts of the supporting arms of the adjacent crystal lattice units are correspondingly connected. When the sole springback cushioning structure is applied to a sole, the springback and cushioning performance of the sole can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of soles, and in particular to a sole rebound and shock-absorbing structure and a sole. Background Art

[0002] With the development of social economy and the continuous improvement of people's material level, more and more people pay attention to health and participate more in sports and fitness in daily life. In particular, during running and other sports, due to the effect of inertia, when the sole of the athlete's shoe touches the ground, the sole will be subjected to the downward pressure exerted by the body's own gravity on the sole, and the anti-impact force exerted by the bottom surface (generally equivalent to 3 to 5 times the body weight), which can easily cause certain damage to the athlete's knee joints and / or ankle joints and other human structures. Therefore, shoes are foot products that protect the legs and feet from injury, and the cushioning function of shoes is very important and necessary.

[0003] Many shoes with shock-absorbing function on the market are improved in the material or structure of the soles. For example, the sole material uses foamed thermoplastic polyurethane material with good shock-absorbing effect, and the sole structure uses air cushions, shock-absorbing columns and other structures. However, for the improvement of the sole material, the shock-absorbing performance required at different positions of the sole is different, and the sole made of the same material cannot meet this demand; for the improvement of the sole structure, there are problems such as the overall structure being too hard and low comfort. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned defects or problems existing in the background technology and to provide a sole rebound and shock-absorbing structure and a sole. When the sole rebound and shock-absorbing structure is applied to the sole, the rebound and shock-absorbing performance of the sole can be improved.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] Technical solution 1: A sole rebound and shock-absorbing structure, comprising: at least one support layer is provided in the vertical direction, and the support layer is formed by connecting a plurality of unit cells in sequence along the horizontal left-right and front-back directions; the unit cell is a cubic configuration, which includes four lattice units of the same shape and size; a horizontal plane located in the middle position of the unit cell in the vertical direction is defined as a first plane, and a vertical plane belonging to a diagonal surface of the unit cell is defined as a second plane, and four regions are formed by the intersection of the first plane and the second plane, and the four lattice units are respectively located in one of the regions; the four lattice units are connected as a whole at the center of the unit cell to form a first connecting portion; each of the lattice units includes a base located in a horizontal position and four arms located in a vertical position, wherein two arms are located on the first vertical plane, and the other two arms are located on the second vertical plane, the first vertical plane is perpendicular to the left-right direction, and the second vertical plane is perpendicular to the front-back direction; one end of the two arms located on the first vertical plane is connected to the first end of the base, and the two arms are connected to the first end of the base. The arms extend forward and backward respectively; one end of the two arms located on the second vertical plane is connected to the second end of the base body opposite to the first end thereof, and the two arms extend leftward and rightward respectively; wherein the ends of the two arms located on the first vertical plane and the second vertical plane and close to each other are connected; in the two lattice units located on the same side of the second plane in the unit cell, each arm of the upper lattice unit extends downward, and each arm of the lower lattice unit extends upward, and the ends of the arms corresponding to the two arms in the vertical direction are connected in pairs, and cooperate with the two arms connected at the ends of the same lattice unit to form a second connecting portion at the end positions of the four arms; between the two lattice units located on one side of the second plane in the unit cell and the two lattice units located on the other side of the second plane, the ends of the four arms that are close to each other and belong to different lattice units are connected to form a third connecting portion, and two third connecting portions are formed in the extension direction of the second plane.

[0007] Technical solution 2 based on technical solution 1: the base and the support arm include two connecting rings which are arranged in sequence along the extension direction of the base or the support arm and connected as a whole; the connecting ring includes two arc-shaped ring arms, and the ends of the two ring arms are respectively connected to form an annular structure with a ring hole in the middle.

[0008] Technical solution three based on technical solution two: in the two lattice units located on the same side of the second plane in the unit cell, connecting ribs extending to the first connecting part are respectively provided starting from the first end, the second end and the two third connecting parts of the two substrates.

[0009] Technical solution four based on technical solution three: in the two lattice units in the unit cell located on the same side of the second plane, a chamber is formed by being surrounded by the base and the arm, and the chamber has openings at both ends of a first direction which is horizontal and parallel to the second plane.

[0010] Technical solution five based on technical solution four: between the unit cells adjacent in the vertical direction, the base at the bottom of the unit cell located above and the base at the top of the unit cell located below are connected as one in a corresponding position.

[0011] Technical solution 6 based on technical solution 5: between the adjacent unit cells in the horizontal left-right and front-back directions, the corresponding arm positions are correspondingly connected as a whole.

[0012] Technical solution seven based on technical solution six: the unit cell is a regular cubic configuration.

[0013] In addition, the present invention also provides technical solution eight: a sole, which adopts the sole rebound and shock-absorbing structure as described in any one of the above technical solutions one to seven.

[0014] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0015] In the sole rebound and shock-absorbing structure provided by the technical solution 1, at least one support layer is arranged in the vertical direction, and the support layer can play a supporting role. The number of support layers can be adjusted according to actual needs to obtain different degrees of rebound and shock-absorbing performance; wherein the support layer is formed by connecting a plurality of unit cells in sequence along the horizontal left-right and front-back directions, and each unit cell is an independent unit, and a complete sole rebound and shock-absorbing structure is formed by connecting a plurality of unit cells in the horizontal direction; each unit cell includes four lattice units of the same shape and size, and the four lattice units are respectively located in four areas formed by the intersection of the first plane and the second plane, and are connected as a whole at the center of the unit cell to form a connecting part; each lattice unit includes a base and a support arm, and both the base and the support arm can play a role in bearing the force, and the support arm can also be deformed when the unit cell is subjected to force, thereby It plays the role of shock absorption and rebound; the arm of the upper lattice unit is connected to the arm of the lower lattice unit, and the arm of the adjacent lattice units in the horizontal direction is also connected to form a second connecting part and a third connecting part. Through these two connecting parts and the first connecting part, the entire unit cell forms an organic whole; when the unit cell is subjected to force, the pressure will be applied to the matrix of the lattice unit at the upper position of the unit cell, and then the pressure will be transmitted to the lattice unit at the lower position through the arm, and at the same time the entire unit cell expands and deforms outward, and the deformation is uniform, so as to achieve the purpose of absorbing energy when impacted and play a shock absorption role; then when the force is removed, the unit cell recovers the deformation, and plays a rebound role in the process of recovering the deformation; through the deformation and recovery of the unit cell, the sole rebound shock absorption structure can have better shock absorption performance and rebound performance.

[0016] In technical solution two, the base and the support arm are formed by two connecting rings. When subjected to force, the connecting rings will deform, and the middle ring hole will change from its original vertically long and flat shape to a shape closer to a circle. This change in shape can improve the ability of the base and the support arm to absorb energy when subjected to force, avoid excessive bending of the support arm, and improve the resilience of the unit cell.

[0017] In technical solution three, connecting ribs are also provided, which strengthen the connection strength between each lattice unit and the first connecting part at the center position, and strengthen the structural stability between the lattice units. When the unit cell is subjected to force, it can act as a force-bearing unit as a whole, effectively improving the overall cushioning and rebound performance of the sole rebound cushioning structure.

[0018] In technical solution four, a chamber is formed by a base and a support arm, and an opening connected to the chamber is provided. The provision of the chamber can reduce the weight of the unit cell and provide a space for the deformation of the unit cell. The provision of the opening can allow the support arm to have a larger deformation amplitude during deformation and provide better rebound.

[0019] In technical solution five, the unit cells in the vertical direction are connected as a whole through their respective bases. When the upper unit cells are subjected to force, the force can be transmitted to the lower unit cells. Through layer-by-layer transmission, the rebound and shock-absorbing performance of the entire sole rebound and shock-absorbing structure is improved.

[0020] In technical solution six, the unit cells are connected as a whole through arms in the horizontal direction. When the sole rebound shock-absorbing structure is subjected to force, the deformation of the arms will be restricted by other unit cells, so that the deformation degree of the unit cells is reduced, thereby avoiding excessive deformation of the unit cells when subjected to force, which leads to a decrease in shock-absorbing performance.

[0021] In technical solution seven, the unit cell is limited to a cubic configuration, so that multiple unit cells can be regularly connected to each other to form a sole rebound and shock-absorbing structure.

[0022] In technical solution eight, a sole is provided, which adopts the above-mentioned sole rebound shock-absorbing structure, so it has good shock-absorbing and supporting performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A schematic diagram of a sole rebound and shock absorbing structure provided in Embodiment 1 of the present invention;

[0025] Figure 2 A schematic diagram of a unit cell structure in a sole rebound shock-absorbing structure provided in Embodiment 1 of the present invention;

[0026] Figure 3 for Figure 2 Schematic top view of the mesocell structure;

[0027] Figure 4 for Figure 2 Schematic diagram of the front view of the mesocell structure;

[0028] Figure 5 The lattice structure obtained after the first coordinate transformation in the first embodiment of the present invention;

[0029] Figure 6 The lattice structure obtained after the second coordinate transformation in the first embodiment of the present invention;

[0030] Figure 7 It is a lattice structure obtained by performing an intersection operation on the lattice structures obtained by the two transformations in the first embodiment of the present invention.

[0031] Description of main reference numerals:

[0032] Support layer 1; unit cell 2; lattice unit 3; first plane 4; second plane 5; first connecting portion 6; base 7; support arm 8; second connecting portion 9; third connecting portion 10; connecting ring 11; ring arm 12; ring hole 13; connecting rib 14; chamber 15; opening 16. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0035] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0036] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0037] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0038] Embodiment 1

[0039] Embodiment 1 of the present invention provides a sole rebound shock absorbing structure, which can be applied to a sole and used as a midsole of the sole. This embodiment is mainly described with the sole rebound shock absorbing structure as the main body.

[0040] Reference Figure 1 , which shows the sole rebound and shock absorbing structure provided by this embodiment, and refers to Figure 2 , which shows Figure 2 The structure of a single unit cell 2 of the midsole rebound cushioning structure.

[0041] In this embodiment, the sole rebound shock-absorbing structure can be prepared by 3D printing, and the material used can be thermoplastic polyurethane elastomer, and the thermoplastic polyurethane elastomer material can be selected from commercially available products, such as Detron AU brand polyurethane material, Covestro UT-AU brand polyurethane material and Lubrizol BF- brand polyurethane material. Alternatively, the material used can also be nylon, and the material brand can be selected according to actual needs. It should be understood that in this embodiment, when the sole rebound shock-absorbing structure is made of different materials, its rebound shock-absorbing performance will inevitably be different, but this difference will not affect the sole rebound shock-absorbing structure to achieve its function.

[0042] Reference Figure 1 The sole rebound and shock-absorbing structure has at least one support layer 1 in the vertical direction, and each support layer 1 is formed by connecting a plurality of unit cells 2 in sequence along the horizontal left-right and front-back directions. Specifically, each unit cell 2 can be regarded as an independent unit. In this embodiment, the unit cell 2 is designed as a cube configuration, and is further designed as a regular cube configuration. This shape can form a connection in each support layer 1 in a plane-closed manner, and can also conveniently form a vertical connection between different support layers 1. In this embodiment, two support layers 1 are provided, and the two support layers 1 are arranged in the vertical direction.

[0043] Reference Figure 2The unit cell 2 includes four lattice units 3 of the same shape and size; a horizontal plane located in the middle position of the unit cell 2 in the vertical direction is defined as a first plane 4, and a vertical plane belonging to a diagonal plane of the unit cell 2 is defined as a second plane 5. Four regions are formed by the intersection of the first plane 4 and the second plane 5, and the four lattice units 3 are respectively located in one of the regions; the four lattice units 3 are connected as a whole at the center position of the unit cell 2 to form a first connecting portion 6; each of the lattice units 3 includes a base 7 located in a horizontal position and four arms 8 located in a vertical position, wherein two arms 8 are located in the first vertical plane, and the other two arms 8 are located in the second vertical plane, the first vertical plane is perpendicular to the left-right direction, and the second vertical plane is perpendicular to the front-back direction; one end of the two arms 8 located in the first vertical plane is connected to the first end of the base 7, and the two arms 8 extend along the front and rear respectively; one end of the two arms 8 located in the second vertical plane is connected to the base 7 has a second end opposite to the first end, and the two arms 8 extend to the left and the right respectively; wherein the ends of the two arms 8 respectively located on the first vertical plane and the second vertical plane and close to each other are connected; in the two lattice units 3 located on the same side of the second plane 5 in the unit cell 2, each arm 8 of the lattice unit 3 located on the upper side extends downward, and each arm 8 of the lattice unit 3 located on the lower side extends upward, and the ends of the arms 8 corresponding to the positions of the two arms 8 in the vertical direction are connected in pairs, and cooperate with the two arms 8 connected at the ends of the same lattice unit 3 to form a second connecting portion at the end positions of the four arms 8; between the two lattice units 3 located on one side of the second plane 5 in the unit cell 2 and the two lattice units 3 located on the other side of the second plane 5, the ends of the four arms 8 that are close to each other and belong to different lattice units 3 are connected to form a third connecting portion, and two third connecting portions are formed in the extension direction of the second plane 5.

[0044] The support arm 8 includes two connecting rings 11 which are sequentially arranged and connected as a whole along the extension direction of the support arm 8; the connecting ring 11 includes two arc-shaped ring arms 12, and the ends of the two ring arms 12 are respectively connected to form a ring structure with a ring hole 13 in the middle.

[0045] In the two lattice units 3 of the unit cell 2 located on the same side of the second plane 5 , connecting ribs 14 extending to the first connecting portion 6 are respectively provided starting from the first end, the second end and the two third connecting portions of the two bases 7 .

[0046] In the two lattice units 3 located on the same side of the second plane 5 in the unit cell 2 , a chamber 15 is formed by being surrounded by the base 7 and the support arms 8 . The chamber 15 is provided with openings 16 at both ends of a first direction which is horizontal and parallel to the second plane 5 .

[0047] The structure of the unit cell 2 will be described in detail below.

[0048] Reference Figure 2 , Figure 2 The first plane 4 and the second plane 5 are orthogonal to each other. Figure 2 The horizontal plane located in the middle of the vertical direction of the unit cell 2 is the first plane 4, and the vertical plane located at a diagonal surface of the unit cell 2 is the second plane 5. The horizontal plane here refers to the plane perpendicular to Figure 2 The first plane 4 and the second plane 5 divide the unit cell 2 into four regions in space. These four regions correspond to the first quadrant, the second quadrant, the third quadrant and the fourth quadrant in the spatial rectangular coordinate system. Each quadrant includes a lattice unit 3. A lattice unit 3 can be regarded as occupying the shape of a triangular prism in space. The projection of the shape of the triangular prism on the first plane 4 is a right triangle. The right angle side of this right triangle is located on the outside of the unit cell 2, and the hypotenuse is located on the inside of the unit cell 2. The hypotenuse of each lattice unit 3 is connected to the hypotenuse of another lattice unit 3 at the same horizontal position. The four lattice units 3 form a first connection portion 6 at the center of the unit cell 2 , that is, at the intersection of the two diagonals on the second plane 5 . The first connection portion 6 connects the four lattice units 3 into a whole, thereby forming the unit cell 2 .

[0049] A lattice unit 3 comprises a base 7 and four arms 8. Figure 2The lattice unit 3 located above the first plane 4 and having two side surfaces corresponding to the front side and the left side of the unit cell 2 is taken as an example for description as the first lattice unit 3. The base 7 of the lattice unit 3 is located at the top position, and the four arms 8 are divided into two groups, one group has two arms 8, and are located at the first vertical plane and the second vertical plane respectively. The first vertical plane corresponds to the left side of the unit cell 2 in the lattice unit 3, and the second vertical plane corresponds to the front side of the unit cell 2 in the lattice unit 3. The base 7 and the support arms 8 both extend in their respective directions, wherein the extension direction of the base 7 of the lattice unit 3 in the projection of the first plane 4 can be regarded as parallel to the second plane 5; the two support arms 8 of the lattice unit 3 located on the first vertical plane can be regarded as, in the projection plane perpendicular to the left-right direction, one support arm 8 extending obliquely from the first end of the base 7 on the left side toward the rear side from top to bottom, and one support arm 8 extending obliquely from the first end of the base 7 on the left side toward the front side, and the two support arms 8 are relatively vertical on the projection plane and are symmetrical about the axis passing through the above-mentioned intersection of the diagonals; similarly, the two support arms 8 of the lattice unit 3 located on the second vertical plane can be regarded as, in the projection plane perpendicular to the front-back direction, one support arm 8 extending obliquely from the second end of the base 7 on the right side toward the left side from top to bottom, and one support arm 8 extending obliquely from the second end of the base 7 on the right side toward the right side, and the two support arms 8 are relatively vertical on the projection plane and are symmetrical about the axis passing through the above-mentioned intersection of the diagonals. On the second plane 5 , the projection of the lattice unit 3 is also relatively vertical and symmetrical about the axis passing through the intersection of the diagonal lines.

[0050] In addition, in the first lattice unit 3, the branch arm 8 located on the left and front is connected to the branch arm 8 located on the front and left, and the branch arm 8 located on the left and back is connected to the branch arm 8 located on the back and left of the second lattice unit 3, and the branch arm 8 located on the front and right is connected to the branch arm 8 located on the right and front of the second lattice unit 3. That is, the above-mentioned branches 8 are connected in pairs at the edges of the unit cell 2 in the vertical direction.

[0051] The lattice unit 3 in the unit cell 2 located above the first plane 4 and whose two side surfaces correspond to the rear side and the right side of the unit cell 2 respectively is the second lattice unit 3, which can be regarded as a symmetrical structure with respect to the second plane 5 and the first lattice unit 3 mentioned above. The two lattice units 3 in the unit cell 2 located below the second plane 5 are respectively the third lattice unit 3 and the fourth lattice unit 3, which can be regarded as a symmetrical structure with respect to the first plane 4 and the first lattice unit 3 and the second lattice unit 3 mentioned above.

[0052] The first lattice unit 3 corresponds to the third lattice unit 3 in the vertical direction, and the four arms 8 of the first lattice unit 3 are connected to the ends of the four arms 8 of the third lattice unit 3. The two front and left arms 8 in the first lattice unit 3 and the two front and left arms 8 in the third lattice unit 3, a total of four arms 8, are connected to form a second connection portion 9; the front and right arm 8 in the first lattice unit 3 and the front arm 8 in the second lattice unit 3 and the fourth lattice unit 3, and the right arm 8 in the third lattice unit 3, a total of four arms 8, are connected to form a third connection portion 10. In general, a unit cell 2 has two second connection portions 9 and two third connection portions 10, and the two third connection portions 10 are along Figure 2 The two second connecting portions 9 are arranged along the extension direction of the second plane 5 in the unit cell 2, and the two second connecting portions 9 are arranged along the extension direction of another diagonal surface (not shown in the figure) of the unit cell 2.

[0053] Among them, refer to Figure 3 and Figure 4 , the base 7 and the support arm 8 are both formed by a connecting ring 11. Figure 2 Taking the arm 8 located at the front and right side of the first lattice unit 3 as an example, the arm 8 includes two connecting rings 11, which extend obliquely from top to bottom and from left to right, wherein the upper end of the connecting ring 11 located at the upper side is connected to the second end of the base 7, and the lower end of the connecting ring 11 located at the lower side is connected to the other arm 8 to form a third connecting portion 10. The ends of the two connecting rings 11 are butted together to form the arm 8 as a whole. Each connecting ring 11 includes two arc-shaped ring arms 12, the ends of which are respectively connected to each other, thereby forming a ring hole 13 in the ring arm 12, and the ring hole 13 of the above-mentioned arm 8 passes through in the front-to-back direction. In the absence of force, the shape of the ring hole 13 of the connecting ring 11 on the projection plane perpendicular to the front-to-back direction is an elongated spindle, and its length direction is consistent with the extension direction of the arm 8. When subjected to force, the ring hole 13 of the connecting ring 11 is deformed and becomes a thicker spindle shape, which plays the role of energy absorption and shock absorption and enhanced rebound.

[0054] Reference Figure 2 The first unit cell 2 and the third unit cell 2 are located on the same side of the second plane 5. The base 7 and the arm 8 of the two unit cells 2 surround a chamber 15. Along the first direction which is horizontal and parallel to the second plane 5, openings 16 are provided at both ends of the chamber 15. The shape of the opening 16 matches the outer contour of the arm 8 at the corresponding position. The chamber 15 can reduce the weight of the unit cell 2 and provide a clearance space for the deformation of the unit cell 2. The opening 16 can allow the arm 8 to have a larger deformation amplitude when deformed, and provide better rebound.

[0055] Reference Figure 2, a plurality of connecting ribs 14 are arranged on the inner wall of the chamber 15. Specifically, taking the first lattice unit 3 and the third lattice unit 3 as an example, the two lattice units 3 are located on the same side of the second plane 5, and the two ends of the upper substrate 7, the two ends of the lower substrate 7, and the two third connecting parts are respectively connected to the first connecting part 6 through the connecting ribs 14. The connecting ribs 14 protrude on the inner wall of the chamber 15, which can increase the connection stability and firmness between the first connecting part 6 and the lattice units 3 at different positions. The connecting ribs 14 strengthen the connection strength between each lattice unit 3 and the first connecting part 6 at the center position, and strengthen the structural stability between the lattice units 3. When subjected to force, the unit cell 2 can act as a force-bearing unit as a whole, effectively improving the overall cushioning and rebound performance of the sole rebound cushioning structure.

[0056] Reference Figure 1 , the entire sole rebound cushioning structure is formed by connecting a plurality of unit cells 2. Among them, between the unit cells 2 adjacent in the vertical direction, the base 7 at the bottom of the unit cell 2 located above and the base 7 at the top of the unit cell 2 located below are connected as a whole in a corresponding position. Between the unit cells 2 adjacent in the horizontal left and right and front and back directions, the corresponding positions of the arms 8 are connected as a whole in a corresponding position. The unit cells 2 in the vertical direction are connected as a whole through their respective bases 7. When the unit cell 2 above is subjected to force, the force can be transmitted to the unit cell 2 below. After layer-by-layer transmission, the rebound cushioning performance of the entire sole rebound cushioning structure is improved. In the horizontal direction, the unit cells 2 are connected as a whole through the arms 8. When the sole rebound cushioning structure is subjected to force, the deformation of the arms 8 will be restricted by other unit cells 2, so that the deformation degree of the unit cell 2 is reduced, thereby avoiding excessive deformation of the unit cell 2 when it is subjected to force, resulting in a decrease in cushioning performance.

[0057] To further illustrate the shape structure of the unit cell 2 , the shape structure of the unit cell 2 is described mathematically below.

[0058] In the process of constructing the unit cell 2, the curved plates along the X, Y and Z directions are first defined by trigonometric functions, and then the symmetrical curved plates in the three directions are obtained by using the phase field φ. Then, Boolean operations are performed to combine the curved plates in the three directions to form the required unit cell 2.

[0059] First, the three basic directions X′, Y′, and Z′ of the control lattice are obtained through coordinate transformation, namely: x′=x+y+z; y′=x+yz; z′=xyz.

[0060] The complex trigonometric functions used to represent the two curved plates in the x' direction are defined as:

[0061]

[0062] Among them, p xrepresents the design period of unit cell 2 in the x′ direction on the plane, q x Used to control the relative position of the rod in a single cell, l x You can control the length of the independent variable whose value range is equal to 1, that is, control the thickness of the straight rod in the cell. is the added phase field, defined as follows: In the formula, c controls the curvature of the curved rod, t x represents the natural period of the curved rod, that is, the period of the curved rod shape, s x It is used to control the relative position of the rod in a single unit cell 2, m controls the bending degree of the curved rod, r x Controls the degree of symmetry of the symmetrical curved rod.

[0063] The trigonometric functions used to represent the curved plate in the Y′ direction are defined as:

[0064]

[0065] in,

[0066] The trigonometric functions of the curved plate in the Z′ direction are defined as:

[0067]

[0068]

[0069] in,

[0070] By performing Heaviside projection on the defined trigonometric function, a curved plate can be obtained. The Heaviside projection function is defined as follows: Where X represents the independent variable mapped by the Heaviside function, α controls the step degree of the Heaviside function, and a fixed value of α=0.01 is taken in the entire design process. If X>0, H(X) returns 1; if X<0, H(X) returns 0.

[0071] For compact mathematical expression, by adding the symmetrical curved plates in different directions, the twelve pairs of curved plates are expressed as:

[0072]

[0073] Afterwards, these curved bars are combined to form Figure 4 The components in , the intersection and union operations are expressed as:

[0074] because Figure 5The components in some areas cannot be reliably supported, so a second coordinate transformation is performed on the basis of the first coordinate transformation: x″=x+yz; y″=xyz; z″=x-y+z; according to the newly obtained three directions X″, Y″, Z″, and the above construction Figure 4 The process of building components is similar. Figure 5 The components shown. Figure 5 and Figure 6 Boolean operations are performed on the components shown You can get Figure 7 The structure of the unit cell 2 provided by the present invention is shown.

[0075] In the sole rebound and shock-absorbing structure provided in the first embodiment, at least one support layer 1 is arranged in the vertical direction, and the support layer 1 can play a supporting role. The number of support layers 1 can be adjusted according to actual needs to obtain different degrees of rebound and shock-absorbing performance; wherein the support layer 1 is formed by connecting a plurality of unit cells 2 in sequence along the horizontal left-right and front-back directions, and each unit cell 2 is an independent unit, and a complete sole rebound and shock-absorbing structure is formed by connecting a plurality of unit cells 2 in the horizontal direction; each unit cell 2 includes four lattice units 3 of the same shape and size, and the four lattice units 3 are respectively located in four areas formed by the intersection of the first plane 4 and the second plane 5, and are connected as a whole at the center position of the unit cell 2 to form a connecting portion; each lattice unit 3 includes a base 7 and a support arm 8, and the base 7 and the support arm 8 can both play the role of bearing the force, and the support arm 8 can also be deformed when the unit cell 2 is subjected to force, thereby The support arms 8 of the upper lattice unit 3 are connected to the support arms 8 of the lower lattice unit 3, and the support arms 8 of the adjacent lattice units 3 in the horizontal direction are also connected to form a second connecting portion and a third connecting portion. Through these two connecting portions and the first connecting portion, the entire unit cell 2 forms an organic whole. When the unit cell 2 is subjected to force, the pressure will be applied to the matrix 7 of the lattice unit 3 at the upper position of the unit cell 2, and then the pressure will be transmitted to the lattice unit 3 at the lower position through the support arms 8. At the same time, the entire unit cell 2 expands and deforms outward, and the deformation is uniform, so as to achieve the purpose of absorbing energy when impacted and play a shock-absorbing role. When the force is removed, the unit cell 2 recovers the deformation, and plays a rebound role in the process of recovering the deformation. Through the deformation and recovery of the unit cell 2, the sole rebound shock-absorbing structure can have better shock-absorbing performance and rebound performance.

[0076] Embodiment 2

[0077] The second embodiment of the present invention provides a sole, which adopts the above-mentioned sole rebound shock-absorbing structure, so that the sole has a good wearing feeling and shock-absorbing support performance. Specifically, the forefoot part, arch part and heel part of the midsole of the sole can adopt the sole rebound shock-absorbing structure provided by the above embodiment, or only some of them can adopt the sole rebound shock-absorbing structure provided by the above embodiment.

[0078] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A sole rebound shock-absorbing structure, characterized in that: include: At least one support layer (1) is provided in the vertical direction, and the support layer (1) is formed by connecting a plurality of unit cells (2) in sequence along the horizontal left-right and front-back directions; The unit cell (2) is a cubic configuration, comprising four lattice units (3) of the same shape and size; a horizontal plane located in the middle of the unit cell (2) in the vertical direction is defined as a first plane (4); a vertical plane belonging to a diagonal surface of the unit cell (2) is defined as a second plane (5); four regions are formed by the intersection of the first plane (4) and the second plane (5), and the four lattice units (3) are respectively located in one of the regions; The four lattice units (3) are connected as a whole at the center position of the unit cell (2) to form a first connecting portion (6); each of the lattice units (3) comprises a base (7) located in a horizontal position and four arms (8) located in a vertical position, wherein two arms (8) are located in a first vertical plane and the other two arms (8) are located in a second vertical plane, the first vertical plane is perpendicular to the left-right direction, and the second vertical plane is perpendicular to the front-back direction; one end of the two arms (8) located in the first vertical plane is connected to the first end of the base (7), and the two arms (8) extend forward and backward respectively; one end of the two arms (8) located in the second vertical plane is connected to the second end of the base (7) opposite to the first end thereof, and the two arms (8) extend leftward and rightward respectively; wherein the ends of the two arms (8) located in the first vertical plane and the second vertical plane and close to each other are connected; In the two lattice units (3) located on the same side of the second plane (5) in the unit cell (2), each branch arm (8) of the lattice unit (3) located on the upper side extends downward, and each branch arm (8) of the lattice unit (3) located on the lower side extends upward, and the ends of the branches (8) corresponding to each other in the vertical direction are connected in pairs, and cooperate with the two branches (8) connected at the ends in the same lattice unit (3) to form a second connecting portion at the end positions of the four branches (8); between the two lattice units (3) located on one side of the second plane (5) in the unit cell (2) and the two lattice units (3) located on the other side of the second plane (5), the ends of the four branches (8) that are close to each other and belong to different lattice units (3) are connected to form a third connecting portion, and two of the third connecting portions are formed in the extension direction of the second plane (5).

2. A sole rebound shock-absorbing structure as claimed in claim 1, characterized in that: The base (7) and the support arm (8) each comprise two connecting rings (11) which are sequentially arranged and connected as one body along the extension direction of the base (7) or the support arm (8); the connecting ring (11) comprises two arc-shaped ring arms (12), the ends of the two ring arms (12) are respectively connected to form a ring structure with a ring hole (13) in the middle.

3. A sole rebound shock-absorbing structure as claimed in claim 2, characterized in that: In the two lattice units (3) located on the same side of the second plane (5) in the unit cell (2), connecting ribs (14) extending to the first connecting portion (6) are respectively provided starting from the first end, the second end and the two third connecting portions of the two bases (7).

4. The sole rebound shock-absorbing structure according to claim 3, characterized in that: In the two lattice units (3) located on the same side of the second plane (5) in the unit cell (2), a chamber (15) is formed by being surrounded by the base (7) and the support arm (8), and the chamber (15) is provided with openings (16) at both ends of a first direction that is horizontal and parallel to the second plane (5).

5. A sole rebound shock-absorbing structure as claimed in claim 4, characterized in that Between the unit cells (2) adjacent to each other in the vertical direction, the base (7) at the bottom of the unit cell (2) located above and the base (7) at the top of the unit cell (2) located below are connected to form a whole at corresponding positions.

6. The sole rebound shock-absorbing structure according to claim 5, characterized in that: Between the adjacent unit cells (2) in the horizontal left-right and front-back directions, the corresponding arms (8) are connected as a whole at corresponding positions.

7. The sole rebound shock absorbing structure according to claim 6, characterized in that: The unit cell (2) is a regular cubic configuration.

8. A shoe sole, characterized in that: The sole rebound and shock-absorbing structure as described in any one of claims 1 to 7 is adopted.

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