阅读说明：本技术 一种低阻力镂空透气鞋底及制备工艺 (Low-resistance hollow breathable sole and preparation process thereof ) 是由 吴荣照 林秀欣 袁雄文 钟素丹 于 2021-09-27 设计创作，主要内容包括：本发明涉及鞋底及制备工艺技术领域,且公开了一种低阻力镂空透气鞋底及制备工艺,包括鞋前底和鞋中底,所述鞋中底包括一体成型的前掌部、后跟部以及对应于足弓位置的中腰部,所述前掌部和鞋前底的连接处设置有第一连接部,所述第一连接部上设置有用以稳固防崴的U型跟杯,所述第一连接部的一侧且位于鞋前底的顶端位置设置有第一通孔,所述后跟部的外侧设置有用于减少后鞋跟脚减少摩擦痛感的第二连接部；所述鞋中底呈镂空设计,所述中腰部上设置有支撑区,所述支撑区上设置有第一弹性垫块。本发明具备轻便防崴透气,且减少扁平足在走路时频发挤压而造成的小腿脚踝等部位酸痛的情况的有益效果。(The invention relates to the technical field of soles and preparation processes, and discloses a low-resistance hollow breathable sole and a preparation process, wherein the low-resistance hollow breathable sole comprises a forefoot sole and a middle sole, the middle sole comprises a forefoot part, a heel part and a middle waist part corresponding to the position of an arch of foot, the joint of the forefoot part and the forefoot sole is provided with a first connecting part, the first connecting part is provided with a U-shaped heel cup for stabilizing and preventing sprain, a first through hole is formed in one side of the first connecting part and at the top end of the forefoot sole, and the outer side of the heel part is provided with a second connecting part for reducing the friction pain of the heel foot; the insole is in a hollow design, a supporting area is arranged on the middle waist part, and a first elastic cushion block is arranged on the supporting area. The invention has the advantages of being portable, preventing sprain and ventilation, and reducing the aching pain of the parts such as the lower leg, the ankle and the like caused by extrusion when flat feet walk.)

1. The utility model provides a low resistance fretwork breathable sole, includes preceding end of a shoe (1) and shoes insole (2), its characterized in that: the insole (2) comprises a front palm part (3), a rear heel part (4) and a middle waist part (5) corresponding to an arch position, wherein the front palm part (3) and the front sole (1) are integrally formed, a first connecting part (6) is arranged at the joint of the front palm part and the front sole (1), a U-shaped heel cup (15) used for preventing the heel from being twisted is arranged on the first connecting part (6), a first through hole (7) is formed in one side of the first connecting part (6) and located at the top end of the front sole (1), the first through hole (7) is arc-shaped, and a second connecting part (8) used for reducing the friction pain of the rear heel foot is arranged on the outer side of the rear heel part (4);

shoe insole (2) are the fretwork design, second through-hole (9) have been seted up to the impartial interval in edge of preceding palm portion (3) and well waist (5), arc quadrangle has been set to second through-hole (9), be provided with supporting area (10) on well waist (5), be provided with first elastic cushion (11) on supporting area (10), just fretwork hole (12) have been seted up on supporting area (10), fretwork hole (12) are the rhombus setting, well waist (5) and be close to one side of sufficient inboard and be provided with arc cushion (13).

2. The low-resistance hollowed-out breathable sole according to claim 1, characterized in that: first recess (17) and second recess (18) have been seted up on shoes insole (2) respectively, first recess (17) set up on the position of heel (4), just first recess (17) set up to a plurality of groups, and a plurality of groups first recess (17) are the setting of staggering, second recess (18) set up and encircle, the degree of depth size of second recess (18) increases from arch of foot portion toward heel portion in proper order.

3. The low-resistance hollowed-out breathable sole according to claim 1, characterized in that: the inside of heel portion (4) is provided with gas storage chamber (23), bleeder vent (16), a plurality of groups have been seted up to the inside of gas storage chamber (23) the degree of depth of bleeder vent (16) is followed heel portion thickness and is increased in proper order.

4. The low-resistance hollowed-out breathable sole according to claim 1, characterized in that: first water drainage grooves (19) are symmetrically formed in two sides of the interior of the first through hole (7), two groups of second water drainage grooves (20) are communicated with one sides of the first water drainage grooves (19), and the second water drainage grooves (20) are arranged in a linear array.

5. The low-resistance hollowed-out breathable sole according to claim 1, characterized in that: the second connecting portion (8) comprises an arc-shaped protruding section (801), a heel protection pad (805) is arranged on the arc-shaped protruding section (801), and a bone beam air cushion (806) is arranged at the connecting position of the heel protection pad (805) and the arc-shaped protruding section (801).

6. The low-resistance hollowed-out breathable sole according to claim 5, characterized in that: first concave section (802) has been seted up to the intermediate position of bone roof beam air cushion (806), first concave section (802) and the one end that is close to heel (4) are provided with second concave section (804), first concave section (802) and the one end of keeping away from heel (4) are provided with spine protection strip piece (803).

7. The low-resistance hollowed-out breathable sole according to claim 1, characterized in that: the heel part (4) is provided with a third groove (21), a compression spring (22) is arranged inside the third groove (21), a plurality of groups of compression springs (22) are arranged, and the compression springs (22) are arranged in an array.

8. The low-resistance hollowed-out breathable sole according to claim 1, characterized in that: and anti-skid lines (14) are arranged in the middle of the front palm part (3) and the middle waist part (5).

9. The production process of the low-resistance hollowed-out breathable sole according to claim 8, characterized in that: the method comprises the following steps:

s1: the method comprises the following steps of (1) automatically feeding, namely, injecting a material into a mold, heating at high temperature, and then forming a shoe insole which is called a one-step foaming insole, namely an EVA shoe insole, into a high polymer material, adopting EVA, PU and SBS foaming compact products, wherein the polyurethane shoe insole which is used as a foaming material takes polyurethane resin as a main raw material, and a foaming adhesive as an auxiliary raw material;

s2: after automatic plasticization and automatic metering, injecting flowing plastic liquid into the mold, and after two times of high-temperature heating, firing the molded insole, namely a secondary foaming insole, wherein the hardness of the insole is controlled by the temperature, and demolding after molding for bonding assembly;

s3: filling the sole: fillers and compression springs are arranged in gaps of the soles, so that the effects of elasticity and buffer and shock absorption are achieved when the shoes are stepped on, and cork and steel bars for firmness and durability are filled in hollow parts;

s4: assembling the welt, bonding, connecting the insole and the outside of the shoe to effectively support the whole shoe structure, embedding the sewing thread after the groove is formed in the outsole, and finally sealing the groove to seal the edge;

s5: sole bottom punches a hole, treats the bottom back of punching a hole, and the material soft or hard is stepped on all the time and can be born human weight, plays the material light, and the design of fretwork trompil for the gas permeability is stronger, and the sole bottom punches a hole and bonds antislip strip, lug.

Technical Field

The invention relates to the technical field of soles and preparation processes, in particular to a low-resistance hollow breathable sole and a preparation process thereof.

Background

The sole is rather complex in construction and in a broad sense may include all of the materials forming the sole, such as the outsole, midsole and heel. In a narrow sense, only the outsole is referred to, and the common characteristics of the general sole materials should have the characteristics of wear resistance, water resistance, oil resistance, heat resistance, pressure resistance, impact resistance, good elasticity, easy adaptation to the foot shape, difficult deformation after shaping, heat preservation, easy moisture absorption and the like, and simultaneously should be matched with the midsole to have the brake function of preventing slipping and easy stopping when the foot is changed during walking. The sole materials are of various types and can be divided into natural base materials and synthetic base materials. The natural bottom materials comprise natural bottom leather, bamboo, wood and the like, and the synthetic bottom materials comprise rubber, plastics, rubber and plastic combined materials, regenerated leather, elastic hardboard and the like.

Most of the existing sports soles are designed for sports, but some people with flat feet mostly select thicker soles when selecting the soles so as to reduce the wear of the shoes, but the soles are not light and thick, and the soles are thin and cannot effectively protect the arches of the flat feet, so that the people with the flat feet are difficult to select the soles.

Disclosure of the invention

The invention provides a low-resistance hollow breathable sole and a preparation process thereof, and the low-resistance hollow breathable sole has the advantages of being light, convenient, capable of preventing sprain and breathability, reducing the situation that when a flat foot is walking, the flat foot is extruded to cause aching pain of parts such as crus, ankles and the like, and solving the problem that the sole arch of the foot of people with the flat foot is difficult to protect in the background technology.

The invention provides the following technical scheme: a low-resistance hollow breathable sole comprises a front sole and a middle sole, wherein the middle sole comprises a front palm part, a rear heel part and a middle waist part corresponding to an arch position, the front palm part and the front sole are integrally formed, a first connecting part is arranged at the joint of the front palm part and the front sole, a U-shaped heel cup used for preventing sprain stably is arranged on the first connecting part, a first through hole is formed in one side of the first connecting part and positioned at the top end of the front sole, the first through hole is arc-shaped, and a second connecting part used for reducing the friction pain of the rear heel foot is arranged on the outer side of the rear heel part;

the shoe insole is of a hollowed-out design, second through holes are formed in the equal distance between the edges of the half sole portion and the middle waist portion, the second through holes are arranged to be arc-shaped quadrangles, a supporting area is arranged on the middle waist portion, a first elastic cushion block is arranged on the supporting area, hollowed-out holes are formed in the supporting area, the hollowed-out holes are arranged in a rhombic shape, and the arc-shaped cushion block is arranged on one side, close to the inner side of a foot, of the middle waist portion.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: first recess and second recess have been seted up on the shoes insole respectively, first recess sets up in the position of heel, just first recess sets up to a plurality of groups, and a plurality of groups first recess is crisscross the setting, the second recess sets up annularly, the depth dimension of second recess increases from arch of foot portion toward heel portion in proper order.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: the inside of heel portion is provided with the gas storage chamber, the bleeder vent has been seted up to the inside in gas storage chamber, a plurality of groups the degree of depth of bleeder vent is followed heel portion thickness and is increased in proper order.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: first water drainage grooves are symmetrically formed in two sides of the interior of the first through hole, and the first water drainage grooves are two groups of second water drainage grooves which are communicated with one side of each first water drainage groove and are arranged in a linear array.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: the second connecting portion include the protruding section of arc, be provided with the heel guard pad on the protruding section of arc, the heel guard pad is provided with the bone roof beam air cushion with the junction of the protruding section of arc.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: a first concave section is arranged in the middle of the bone beam air cushion, a second concave section is arranged at one end, close to the heel portion, of the first concave section, and a spine protection strip block is arranged at one end, far away from the heel portion, of the first concave section.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: the heel portion is provided with a third groove, a compression spring is arranged inside the third groove, a plurality of groups of the compression spring are arranged, and the compression spring is arranged in an array mode.

As an alternative solution to the low resistance hollowed out breathable sole of the invention, wherein: the middle of the half sole part and the middle waist part is provided with anti-skid grains.

The production process of the low-resistance hollow breathable sole comprises the following steps:

s1: the method comprises the following steps of (1) automatically feeding, namely, injecting a material into a mold, heating at high temperature, and then forming a shoe insole which is called a one-step foaming insole, namely an EVA shoe insole, into a high polymer material, adopting EVA, PU and SBS foaming compact products, wherein the polyurethane shoe insole which is used as a foaming material takes polyurethane resin as a main raw material, and a foaming adhesive as an auxiliary raw material;

s2: after automatic plasticization and automatic metering, injecting flowing plastic liquid into the mold, and after two times of high-temperature heating, firing the molded insole, namely a secondary foaming insole, wherein the hardness of the insole is controlled by the temperature, and demolding after molding for bonding assembly;

s3: filling the sole: fillers and compression springs are arranged in gaps of the soles, so that the effects of elasticity and buffer and shock absorption are achieved when the shoes are stepped on, and cork and steel bars for firmness and durability are filled in hollow parts;

s4: assembling the welt, bonding, connecting the insole and the outside of the shoe to effectively support the whole shoe structure, embedding the sewing thread after the groove is formed in the outsole, and finally sealing the groove to seal the edge;

s5: the sole bottom punches a hole, and the back of punching a hole in the bottom, the material soft or hard is stepped on all the time and can be born human weight, plays the material light, and the design of fretwork trompil for the gas permeability is stronger, and the sole bottom punches a hole and bonds antislip strip, lug.

The invention has the following beneficial effects:

1. the low-resistance hollowed breathable sole and the preparation process have the advantages that the insole is hollowed, the support area is arranged on the middle waist part, the first elastic rubber cushion block is arranged in the middle area of the support leg on the support area, the excellent cushioning performance is realized, the material with high elasticity is beneficial to the rapidness of the two feet in the starting process, the central position of the feet can be protected when the shoes stop running, the ground grabbing force and the friction are increased, the hollow holes are formed in the support area and are arranged in a diamond shape, the hollow holes are convenient for three-dimensional ventilation, due to the arch of foot, the ventilation space is larger, the ventilation effect can better play a role of ventilation, the arc cushion block is arranged on one side of the middle waist part close to the inner side of the foot, the arc cushion block is used for protecting the flexible part of the inner side of the arch of foot, part of the human arch with flat feet is very low, even no arch of foot appears, and the back foot turns outwards, when walking, the inner side of the sole or the whole sole can be in direct contact with the place, the sole is evenly stressed, grinding is caused to occur in the middle of the sole, powerful arch support is added through the arc cushion blocks, the heel has good elasticity and supporting force, the phenomenon that the arch of a foot is stressed little in the anthropomorphic society of the flat foot can be reduced, pressure is reduced, overall balance is achieved, extrusion when the flat foot walks is reduced, and the situation that the parts of the lower leg, the ankle and the like are sore when the flat foot walks too much is avoided.

2. This breathable sole of low resistance fretwork and preparation technology, inside through the back heel is provided with the gas storage chamber, the bleeder vent has been seted up to the inside in gas storage chamber, the degree of depth of a plurality of groups of bleeder vents is followed heel thickness and is increased in proper order, the sole can not produce uncomfortable and produce the vexed impression of foot when sweating like this, it can send out rapidly to have increased the sweaty foot, it receives the risk of bacterium and fungal infection to reduce the step, thereby make the space layer volume change with the help of the pressure of people's walking in gas storage chamber and a plurality of groups of bleeder vents, carry out gas exchange automatically, thereby reach ventilative, the mesh of dispelling the damp.

3. This ventilative sole of low resistance fretwork and preparation technology, include the arc protruding section through the second connecting portion, be provided with on the arc protruding section and protect the heel pad, it is provided with the bone roof beam air cushion to protect the heel pad and the junction of arc protruding section, the bone roof beam air cushion sets up to foam, it is light and little to the frictional force of foot, first concave section has been seted up to the intermediate position of bone roof beam air cushion, first concave section and the one end that is close to the back heel are provided with the second concave section, the one end that first concave section just kept away from the back heel is provided with the spine protection strip piece, the effect of second connecting portion, be the reaction force in order to reduce ground, avoid the vertebra, the knee, the ankle etc. receives improper ground reaction force extrusion, cause the motion injury. The sole is used for protecting ligaments of heels and ankles, and the comfort level of the sole is improved.

4. This ventilative sole of low resistance fretwork and preparation technology, through the first plastify in the process step twice foaming insole of moulding plastics after automatic measurement, open the mould about 400 seconds after vulcanizing through adding the vacuum, the foaming shaping of sole in the mould, through hot, cold setting decide, the back drawing of patterns that waits to take shape is glued sole and is sealed you and fill, the assembly and the bottom fretwork place of welt punch a hole, at last the preparation antiskid line accomplishes the technology preparation, plays the production line integration, and convenient effect.

Drawings

FIG. 1 is a schematic top view of the structure of the present invention.

FIG. 2 is a schematic axial view of the structure of the present invention.

Fig. 3 is a schematic structural diagram of a second connecting portion according to the present invention.

Fig. 4 is a schematic cross-sectional view of a first via structure of the present invention.

FIG. 5 is a schematic structural diagram of a third groove according to the present invention.

FIG. 6 is a schematic step diagram of the process of the present invention.

In the figure: 1. a forefoot sole; 2. a midsole; 3. a front palm portion; 4. a heel section; 5. the middle waist part; 6. a first connection portion; 7. a first through hole; 8. a second connecting portion; 801. an arc-shaped protruding section; 802. a first concave section; 803. a spine protection strip block; 804. a second concave section; 805. a heel protection pad; 806. a bone beam air cushion; 9. a second through hole; 10. a support region; 11. a first resilient pad; 12. hollowing out holes; 13. an arc-shaped cushion block; 14. anti-skid lines; 15. a U-shaped heel cup; 16. air holes are formed; 17. a first groove; 18. a second groove; 19. a first drainage tank; 20. a second water discharge tank; 21. a third groove; 22. a compression spring; 23. a gas storage cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention provides the following technical solutions: a low-resistance hollow breathable sole comprises a forefoot portion 1 and a heel portion 4 and a middle waist portion 5 corresponding to an arch position, wherein the midsole portion 2 comprises the forefoot portion 3, the heel portion 4 and the middle waist portion 5 which are integrally formed, a first connecting portion 6 is arranged at the connecting portion of the forefoot portion 3 and the forefoot portion 1, a U-shaped heel cup 15 used for preventing the heel from being bent stably is arranged on the first connecting portion 6, a first through hole 7 is formed in one side of the first connecting portion 6 and located at the top end of the forefoot portion 1, the first through hole 7 is arc-shaped, and a second connecting portion 8 used for reducing the friction pain of a heel foot is arranged on the outer side of the heel portion 4;

the insole 2 is in a hollow design, the edges of the half sole part 3 and the middle waist part 5 are provided with second through holes 9 at equal intervals, the second through holes 9 are arranged in an arc quadrangle, the middle waist part 5 is provided with a supporting area 10, the supporting area 10 is provided with a first elastic cushion block 11, the first elastic cushion block 11 is a rubber elastic cushion block and is used in the middle area of the supporting leg, the insole not only has excellent shock absorption performance, the material rich in elasticity is beneficial to the two feet to start more rapidly, but also can protect the central position of the feet when the feet run off, the ground gripping force and the friction are increased, the supporting area 10 is provided with hollow holes 12, the hollow holes 12 are arranged in a diamond shape, the hollow holes 12 are convenient for three-dimensional ventilation, the ventilation space is larger due to the arch of foot, the ventilation effect is better played, one side of the middle waist part 5 close to the inner side of the feet is provided with an arc cushion block 13, the arc cushion block 13 is used for protecting the soft part on the inner side of the arch of foot, the arch of foot of a part of people with flat feet is very low, even the arch of foot is not existed, the back foot is turned outwards, the inner side of the sole or the whole sole can be in direct contact with the place when walking, the sole is uniformly stressed, so that the middle position of the sole is ground, strong arch support is added through the arc cushion block 13, the heel has good elasticity and supporting force, the arch of foot stress can be reduced when the humanity of the flat feet is reduced, the pressure is reduced, the integral balance is achieved, the extrusion of the flat feet when walking is reduced, and the situation of aching pain of the lower legs, ankles and other parts is caused.

Wherein: first recess 17 and second recess 18 have been seted up on the shoes insole 2 respectively, and first recess 17 sets up on the position of heel 4, and first recess 17 sets up to a plurality of groups, and the first recess 17 of a plurality of groups is the setting of staggering, and second recess 18 sets up the ring, and the degree of depth size of second recess 18 increases from arch of foot portion toward heel portion in proper order.

Wherein: the inside of heel 4 is provided with gas storage chamber 23, bleeder vent 16 has been seted up to the inside of gas storage chamber 23, heel portion thickness is followed in proper order to the degree of depth of a plurality of groups bleeder vent 16, the sole can not produce the vexed impression of uncomfortable production foot when sweating like this, it can send out rapidly to have increased the sweaty foot, reduce the risk that the step received bacterium and fungal infection, thereby make space layer volume change with the help of the pressure of people's walking in gas storage chamber 23 and a plurality of groups bleeder vent 16, carry out gas exchange automatically, thereby reach ventilative, the mesh of dispelling the damp.

Wherein: first water drainage tank 19 has been seted up to the inside bilateral symmetry of first through-hole 7, and one side of two sets of first water drainage tanks 19 all communicates there are a plurality of groups second water drainage tank 20, and a plurality of groups second water drainage tank 20 are linear array setting, reduce the resistance, and in rainy day, can carry out the drainage through first water drainage tank 19 and second water drainage tank 20.

Second connecting portion 8 includes arc protruding section 801, be provided with on the arc protruding section 801 and protect heel pad 805, it is provided with bone beam air cushion 806 to protect heel pad 805 and the junction of arc protruding section 801, bone beam air cushion 806 sets up to foam, it is light and little to the frictional force of foot, first concave section 802 has been seted up to bone beam air cushion 806's intermediate position, first concave section 802 and the one end that is close to back heel 4 are provided with second concave section 804, first concave section 802 and the one end of keeping away from back heel 4 are provided with protects spine strip piece 803, the effect of second connecting portion 8, be in order to reduce the reaction force on ground, avoid vertebra, the knee, the ankle etc. to receive improper ground reaction force extrusion, cause the motion injury. The sole is used for protecting ligaments of heels and ankles, and the comfort level of the sole is improved.

Wherein: the third recess 21 has been seted up on heel 4, and the inside of third recess 21 is provided with compression spring 22, and compression spring 22 is provided with many and does the group, and a plurality of groups compression spring 22 are the array setting, and compression spring 22 has shock-absorbing function, and the sole that shock-absorbing performance is good can slow down the impact of external force to the foot.

Wherein: the middle of the front palm part 3 and the middle waist part 5 is provided with anti-slip lines 14, so that the anti-slip function of the sole is increased, the lines on the anti-slip lines 14 can increase friction and reduce the slip probability, and then the wear of the sole can be replaced, so that the service life of the sole is prolonged, and the anti-slip function is realized.

Referring to fig. 6, the present embodiment further provides a production process of a low-resistance hollow-out breathable sole, including the following steps:

s1: the technological process of the sole workshop comprises the steps of preprocessing raw materials, cutting off and the like in the early stage, then vulcanizing, trimming, completing production, waiting for the next step of technological processing, namely automatic feeding, injecting the materials into a mold, heating the materials at high temperature, and then forming a shoe insole in one step, namely a one-step foaming insole, namely an EVA shoe insole, directly injecting EVA resin particles into a machine table mold by an injection machine, setting the EVA shoe insole material as a high polymer material, adopting EVA, PU and SBS foaming compact products, using polyurethane resin as a main raw material for the polyurethane sole which is a material for foaming, and using a foaming adhesive as an auxiliary raw material;

s2: after automatic plasticization and automatic metering, flowing plastic liquid is injected into the mold, and the molded shoe insole is fired after two times of high-temperature heating, so that the shoe insole is called a secondary foaming insole. The lower the temperature is, the lighter the PHYLON which is naturally burnt out is, the softer the PHYLON is, so the quality of the evaluated shoe insole can not be measured by the weight or the hardness degree, different secondary foaming processes can be carried out, the hardness of the PHYLON can be different, the shoe insole which is formed in one step after being heated at high temperature is also called a primary foaming insole, namely the hardness of the shoe insole sole of the EVA shoe is also controlled by the temperature, after vacuum vulcanization is carried out for about 400 seconds, a mold is opened, the shoe sole in the mold is foamed and formed, then hot and cold setting are carried out, after forming, demolding is carried out for bonding assembly, after forming the shoe sole, a layer of chemical substances, mold release agents and mold release agents are required to be sprayed in the mold, and demolding is convenient;

s3: filling the sole: fillers and compression springs are arranged in gaps of the soles, so that the effects of elasticity and buffer and shock absorption are achieved when the shoes are stepped on, and cork and steel bars for firmness and durability are filled in hollow parts;

s4: assembling and bonding the welts, connecting the insole and the outside of the shoe to effectively support the whole shoe structure, embedding a sewing line after a groove is formed in the outsole, and finally sealing the groove to seal the edge, wherein burrs are formed at some parts of the sole and the assembly is continued after polishing;

s5: the sole bottom punches a hole, and the sole bottom punches a hole the back, and the material soft or hard can bear human weight all the time, plays the material light and graceful, the design of fretwork trompil for the gas permeability is stronger, and the sole bottom punches a hole bonding antislip strip, and the lug makes anti-skidding line.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.