shoe

Abstract

Provided is a shoe including an insole and a comfort system. The insole includes a forefoot part, a midfoot arch part and a heel part which are sequentially distributed along a length direction of the insole. The forefoot part, the midfoot arch part and the heel part are sequentially bent toward a side of a foot and are smoothly connected, in such a manner that an upper surface of the insole forms a transitional curved surface matching a contour of a bottom surface of the foot. The comfort system includes a cushioning component and a pressure dispersion component. The pressure dispersion component includes a first elastic member, and the cushioning component includes a second elastic member. The first elastic member is fixedly mounted on the forefoot part of the insole, and the second elastic member is fixedly mounted on the heel part of the insole.

Description

CROSS-REFERENCE OF RELATED APPLICATION

[0001] This application claims priority to Chinese patent application No. 202620388803.7, filed on March 26, 2026, the entire disclosure of which is incorporated herein by reference.TECHNICAL FIELD

[0002] The disclosure relates to the technical field of footwear products, and particularly to a shoe.BACKGROUND

[0003] With the increasing demand for use in multiple scenarios such as daily wearing and business workplaces, high-heeled shoes have become widely popular footwear products. By raising the heights of the heels, the high-heeled shoes optimize the wearer’s body posture and improve the wearing effect, having strong practical and decorative attributes. However, the inherent mechanical defects and comfort pain points during the wearing of high-heeled shoes have long restricted the use experience, wearing duration and applicable scenarios of high-heeled shoes.

[0004] When a person wears high-heeled shoes, the raised heels would cause a significant forward shift of the person’s overall center of gravity, resulting in a serious imbalance in the load distribution of the person’s body weight on the foot. Existing conventional high-heeled shoes cannot provide uniform and fitting support for the bottom of the foot. During daily standing and walking, the continuous forward shift of center of gravity would cause the forefoot area to bear high local pressure, and this pressure would significantly increase with the increase of heel height. Long-term concentrated pressure would directly lead to obvious tenderness and soreness in the forefoot area, and even cause soft tissue injury and chronic strain of the metatarsal bones in the forefoot area, which not only greatly shortens the wearing duration of high-heeled shoes, but also brings strong discomfort to the wearer. The heel area would directly bear the instantaneous impact load from the ground during walking, and then transmit the impact load upward to the ankle joint, knee joint and even the lumbar spine. In addition to causing impact pain in the heel area, long-term wearing of high-heeled shoes would significantly increase the strain risk of lower limb joints and spine, affecting foot health and lower limb physiological health. Therefore, the existing high-heeled shoes fail to balance the decorative wearing, wearing comfort experience and physiological health protection. That is, how to improve the imbalance of foot pressure distribution and alleviate the discomfort and long-term health risks caused by concentrated pressure on the forefoot and impact load on the heel while ensuring the original wearing effect of high-heeled shoes has become core technical demands urgently needed to be improved in the field.SUMMARY

[0005] In view of this, embodiments of the disclosure provide a shoe.

[0006] The shoe provided by the embodiments of the disclosure includes an insole and a comfort system. The insole includes a forefoot part, a midfoot arch part and a heel part which are sequentially distributed along a length direction of the insole. The forefoot part, the midfoot arch part and the heel part are sequentially bent toward a side of a foot and are smoothly connected, in such a manner that an upper surface of the insole forms a transitional curved surface matching a contour of a bottom surface of the foot. The comfort system includes a cushioning component and a pressure dispersion component. The pressure dispersion component includes a first elastic member, and the cushioning component includes a second elastic member. The first elastic member is fixedly mounted on the forefoot part of the insole, and the second elastic member is fixedly mounted on the heel part of the insole.BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To more clearly illustrate the technical solutions of the disclosure, drawings required for the embodiments will be briefly introduced below. Apparently, the drawings described below are only some embodiments of the disclosure. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0008] FIG. 1 is a structural schematic diagram of a shoe provided by the embodiments of the disclosure.

[0009] FIG. 2 is an exploded diagram of the shoe provided by the embodiments of the disclosure from a first perspective.

[0010] FIG. 3 is an exploded diagram of the shoe provided by the embodiments of the disclosure from a second perspective.

[0011] FIG. 4 is a view illustrating partial assembly of a midsole and a comfort system as provided in the embodiments of the disclosure.

[0012] FIG. 5 is a view illustrating partial assembly of an insole and the comfort system as provided in the embodiments of the disclosure.

[0013] FIG. 6 is a sectional view taken along line VI-VI in FIG. 1.

[0014] FIG. 7 is a sectional view taken along line VII-VII in FIG. 1.

[0015] Reference signs: 1000-shoe; 100-shoe body; 100a-shoe cavity; 111-forefoot part; 112-arch part; 112a-medial arch side; 112b-lateral arch side; 113-heel part; 121-upper; 122-midsole; 1221-first forefoot part; 1222-first longitudinal arch part; 1223-first heel part; 1224a-first limiting groove; 1224b-second limiting groove; 123-outsole; 1231-second forefoot part; 1232-second longitudinal arch part; 1233-second heel part; 200-comfort system; 210-pressure dispersion component; 211-first elastic member; 212-pressure bladder; 220-cushioning component; 221-second elastic member; 222-foam support; 300-insole; 310-forefoot part of insole; 320-midfoot arch part of insole; 330-heel part of insole; 340-bending part; 350-folded edge part; 410-first fastener; 420-second fastener; and 500-toe puff.DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0016] To enable those skilled in the art to better understand the solutions of the disclosure, the technical solutions in the embodiments of the disclosure will be clearly and comprehensively described below in conjunction with the drawings in the embodiments of the disclosure. Apparently, the described embodiments are only a part of the embodiments of the disclosure, rather than all the embodiments. All other embodiments, obtained by those skilled in the art based on the embodiments in the disclosure without creative efforts, shall fall within the protection scope of the disclosure.

[0017] The disclosure relates to a shoe 1000, and the shoe 1000 may be but not limited to a high-heeled shoe for daily wearing, a formal leather shoe and other footwear products with a certain heel height. For the convenience of clearly and completely explaining the technical solutions and principles of the disclosure, the following description of this specification will take a high-heeled shoe as an example for detailed explanation. It should be noted that the embodiments are only used to exemplarily explain the technical concept of the disclosure, and is not used to limit the protection scope of the disclosure. Other footwear products adopting the technical solution described in the disclosure shall fall within the protection scope of the disclosure.

[0018] According to ergonomics and foot biomechanics, when a shoe is provided with a heel of a certain height, the wearer’s heel is passively raised, and the wearer’s overall center of gravity naturally shifts to the forefoot area. Under the working condition of static standing, the pressure bearing ratio of the forefoot area is significantly increased compared with that of wearing a flat-heel shoe, and the forefoot area bears most of the body weight load of the wearer. During dynamic walking, the human foot goes through a complete process including heel landing, arch support and forefoot push-off in sequence. The heel area first bears the instantaneous impact load from the ground, then the load is quickly transferred towards the forefoot area, and the forefoot area also needs to bear the propulsion stress for the human body to move forward during the push-off stage. Thus, under all working conditions of static standing and dynamic walking of high-heeled shoes, the forefoot area and the heel area have significantly differentiated load-bearing characteristics, that is, the forefoot area is mainly subject to long-term continuous concentrated compressive stress, and the heel area is mainly subject to instantaneous impact load.

[0019] However, the structural design of existing high-heeled shoe products mostly focuses on meeting basic wearing functions and appearance design requirements, and cushion pads are mainly adopted as the mitigation measure thereof for foot loading, without targeted ergonomic design for the differentiated load-bearing characteristics of different areas of the foot under all the working conditions of high-heeled shoes as mentioned above. It can neither effectively disperse the concentrated compressive stress in the forefoot area, nor fully absorb the instantaneous impact load in the heel area, causing the wearer’s foot to be in a load-bearing state that does not meet the requirements of human physiological structure and ergonomics for a long time. This will not only quickly cause foot fatigue during wearing, but also increase the occurrence of chronic foot injuries such as metatarsal pain in the forefoot area and arch function degradation with long-term wearing. In addition, the instantaneous impact generated when the heel lands directly acts on the heel fat pad and calcaneal tuberosity. Long-term repeated mechanical impact would cause atrophy of the heel fat pad, weaken the native cushioning protection ability of the foot, further aggravate the axial stress of the calcaneus, and significantly increase the probability of calcaneal periostitis, calcaneal spurs and plantar fasciitis.

[0020] In view of the above defects in the prior art, the following description of this specification will elaborate on the technical solutions for a shoe proposed by the disclosure that adapt to the differentiated load-bearing characteristics of the foot under all working conditions and alleviate the deficiencies in the prior art.

[0021] In the embodiments, referring to FIGS. 1-7, the shoe 1000 includes a shoe body 100, a comfort system 200 and an insole 300. The shoe body 100 is provided with a shoe cavity 100a for accommodating the wearer’s foot, and the shoe body 100 is sequentially divided, along the length direction L, into a forefoot part 111 located at a position corresponding to the forefoot area, an arch part 112 located at a position corresponding to the arch area, and a heel part (rearfoot part) 113 located at a position corresponding to the heel area. It is noted that the length direction of the shoe body 100 is the extension direction of the shoe body 100 along the physiological foot length of the human foot in a naturally stretched state.

[0022] Further, the insole 300 is detachably connected to the shoe body 100, so that the wearers can use insoles 300 of different thicknesses, materials and support characteristics according to their own foot shape characteristics, arch states and wearing needs, thereby improving the adaptability and wearing experience of the footwear product to different wearers, and also facilitating the daily cleaning and replacement of the insole 300 to ensure the hygiene inside the shoe cavity 100a. Moreover, the insole 300 is stacked on a surface of the comfort system 200 facing the shoe cavity 100a, and serves as a uniform load transmission layer between the human foot and the comfort system 200 during wearing. This avoids local foreign body sensation caused by direct contact between a pressure dispersion component 210 and a cushioning (shock absorption) component 220 of the comfort system and the foot, ensures the wearing flatness and foot fit inside the shoe cavity 100a, and ensures that the load regulation of the comfort system 200 can evenly act on the corresponding areas of the foot.

[0023] Preferably, referring to FIGS. 2 and 3, the comfort system 200 includes a cushioning component 220 and a pressure dispersion component 210 which are independently configured for the load-bearing characteristics of different areas of the foot. The pressure dispersion component 210 is located at the forefoot part 111 of the shoe body 100, for targeted regulation of the concentrated compressive stress distribution in the forefoot area under the static and dynamic working conditions. The cushioning component 220 is located at the heel part 113 of the shoe body 100, for targeted absorption of the instantaneous impact load generated when the heel touches the ground under dynamic walking conditions. In this way, it breaks through the technical limitation of the prior art that only cushion pads are used to alleviate the foot pressure, and it enables targeted regulation of the concentrated compressive stress in the forefoot area and the instantaneous impact load in the heel area.

[0024] It is worth mentioning that the pressure dispersion component 210 of the disclosure can cause the local high load concentrated in the forefoot area to be evenly dispersed in plane once the human body weight load and walking propulsion stress are transmitted to the shoe body 100, which converts the load originally concentrated in a local region into an in-plane load evenly distributed in the entire forefoot area. This significantly reduces the peak pressure in the forefoot area, and thus effectively relieves the continuous compressive stress caused by the high pressure bearing ratio of the forefoot area which is caused due to the forward shift of the human body’s center of gravity under the working condition of static standing. In addition, during the push-off stage of dynamic walking, it can evenly disperse the propulsion stress borne by the forefoot area, avoiding the propulsion stress from being concentrated in a local region of the forefoot. As such, it solves the technical problem that the concentrated compressive stress in the forefoot area cannot be effectively dispersed under all static and dynamic working conditions, and thus reduces the occurrence of chronic foot injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain in the forefoot area caused by long-term continuous concentrated compressive stress, and slows down the occurrence speed of foot fatigue during long-term wearing.

[0025] For the technical defect that existing high-heeled shoe products cannot fully absorb the instantaneous impact load in the heel area, the cushioning component 220 of the disclosure has good impact energy absorption efficiency, and can quickly absorb, through its own elastic deformation characteristics, the mechanical energy generated by the impact load at the moment when the heel touches the ground under the working condition of dynamic walking. This greatly reduces the peak value of the impact load, and reduces the instantaneous axial impact force borne by the calcaneus and heel fat pad when the heel touches the ground. As such, it effectively solves the technical problem that the instantaneous impact load in the heel area cannot be fully absorbed, avoids atrophy of the heel fat pad caused by long-term repeated instantaneous impact, and reduces the probability of chronic injuries in the heel area such as calcaneal periostitis, calcaneal spurs and plantar fasciitis. In addition, the impact load after being fully attenuated by the cushioning component 220 would not be transmitted upward along the human lower limb biomechanical line, which can effectively avoid long-term repeated axial impact of the impact load on the proximal joints and bone structures such as knee joints, hip joints and spine, and reduce the long-term risk of degenerative diseases such as articular cartilage wear of lower limb joints.

[0026] To sum up, in the embodiments, through the cooperation of the pressure dispersion component 210 and the cushioning component 220, it can simultaneously solve the technical problems of concentrated compressive stress in the forefoot area and instantaneous impact load in the heel area, so that the wearer’s foot can maintain a load-bearing state in line with the human physiological structure and biomechanical requirements under all working conditions of static standing and dynamic walking. The wearer’s abnormal gait adopted to avoid the impact pain of heel landing and the compression pain of the forefoot area can be prevented. It enables the wearer to maintain the complete gait actions of normal heel landing, arch support and forefoot push-off, and maintain the normal movement line and pressure balance of the ankle joint, thereby avoiding problems such as ligament strain around the ankle joint, joint instability and habitual sprain caused by abnormal gait. Furthermore, in one aspect, normal gait can ensure the normal support function of the arch, and avoid arch function degradation caused by long-term abnormal load-bearing, which further reduces the occurrence of chronic foot injuries; in another aspect, it can also relieve problems such as tension and spasm of calf muscle groups caused by long-term wearing of high-heeled shoes, and further improve the long-term wearing comfort of heeled footwear products.

[0027] It is noted that the pressure dispersion component 210 of the disclosure is a functional component for dispersing the concentrated compressive stress in the forefoot area. Based on the metatarsal distribution of the human forefoot, the pressure dispersion component 210 can convert the concentrated bearing pressure of the forefoot area during static standing and the propulsion stress of the forefoot during dynamic walking from local load to an in-plane load evenly distributed in the entire forefoot, thereby reducing the peak pressure in the forefoot area. Usually, the pressure dispersion component 210 is a silicon pressure dispersion pad or a honeycomb elastic polyurethane pressure dispersion sheet. The cushioning component 220 is a functional component configured to absorb the instantaneous impact load of the heel. For the load-bearing characteristics that the heel touches the ground first during dynamic walking, through the cushioning component’s own structural deformation, the cushioning component attenuates the impact energy, reduces the peak value of impact load, and protects the heel and lower limb joints. Usually, the cushioning component 220 is a polyurethane cushioning block or a spring-type cushioning core.

[0028] As a preferred implementation, referring to FIGS. 2, 3, 4, and 5, the pressure dispersion component 210 includes a first elastic member 211 and a pressure bladder 212. The first elastic member 211 is made of an elastic material meeting the load-bearing requirements of the forefoot area, such as silicon with good elastic deformation ability and load cushioning performance. The first elastic member 211 is arranged on a lower surface of the insole 300 facing the shoe body 100. Specifically, the insole 300 is sequentially divided, along its own length direction, into a forefoot part 310 located at a position corresponding to the forefoot area, a midfoot arch part 320 located at a position corresponding to the arch area, and a heel part 330 located at a position corresponding to the heel area. The first elastic member 211 is fixedly mounted on the lower surface of the forefoot part 310 of the insole 300 facing the shoe body 100, and forms an integrated force transmission structure with the forefoot part 310 of the insole 300.

[0029] The pressure bladder 212 is located on a side of the first elastic member 211 facing the shoe body 100, and is fixedly mounted on the forefoot part 111 of the shoe body 100. The first elastic member 211 and the pressure bladder 212 are stacked in an up-down direction, located at corresponding positions, and tightly attached / fit to each other, ensuring smooth and stable force transmission between the first elastic member 211 and the pressure bladder 212. After assembly, the insole 300, the first elastic member 211, the pressure bladder 212 and the shoe body 100 form a stacked assembly structure from top to bottom.

[0030] In actual wearing, the first elastic member 211 can receive the local concentrated load transmitted from the insole 300, and make the load preliminarily cushioned and unloaded through its own elastic deformation characteristics, thereby weakening the local load peak. In addition, the first elastic member avoids foreign body sensation caused by direct contact between the pressure bladder 212 and the insole 300, ensuring wearing comfort. Then, the pressure bladder 212 receives the load preliminarily cushioned by the first elastic member 211, and further disperses the load originally concentrated in the forefoot area to the entire forefoot part 111 through the pressure bladder’s own structural deformation and the flow of its internal filled medium, thereby realizing in-plane uniform distribution of the load and effectively reducing the peak pressure in the forefoot area.

[0031] Therefore, the layered cooperation of the first elastic member 211 and the pressure bladder 212 forms a graded cushioning structure that disperses pressure grade by grade, which not only ensures the smoothness and stability of load transmission, but also realizes progressive load regulation of “preliminary cushioning-secondary dispersion”. This makes the load-bearing state of the forefoot area more in line with the requirements of human foot biomechanics, and effectively relieves the continuous compression feeling of the forefoot area caused by high pressure bearing during static standing. In addition, it reduces the impact of propulsion stress on the local forefoot area during the push-off stage of dynamic walking, and slows down the occurrence speed of foot fatigue. Furthermore, it reduces the occurrence of chronic foot injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain in the forefoot area caused by long-term local high stress.

[0032] It is worth mentioning that the first elastic member 211 is fixedly mounted on the insole 300, and the pressure bladder 212 is fixedly mounted on the shoe body 100, which can avoid displacement and offset of the pressure dispersion component 210 during wearing, ensuring the stability and durability of the pressure dispersion function. In addition, in cooperation with the detachable assembly of the insole 300, the normal operation of the pressure dispersion component 210 will not be affected by the replacement of the insole 300, which further improves the practicability and adaptability of the shoe 1000.

[0033] Further, a stacking direction of the first elastic member 211 and the pressure bladder 212 is the thickness direction T of the shoe body 100 and a direction along which the foot load is transmitted to the shoe body 100. The projection of the first elastic member 211 is within a coverage range of the pressure bladder 212, that is, the orthographic projection of the first elastic member 211 on a plane perpendicular to the stacking direction completely falls within the orthographic projection of the pressure bladder 212 on the same plane. This could ensure that all loads from the forefoot area received by the first elastic member 211 can be transmitted to the pressure bladder 212 for uniform dispersion. This effectively reduces the peak pressure in the forefoot area, and makes the load-bearing state of the forefoot more in line with the human foot physiological structure and biomechanical requirements, thereby slowing down the occurrence speed of foot fatigue during long-term wearing of high-heeled shoes, reducing the continuous compression feeling of the forefoot area under all static and dynamic working conditions, and reducing the occurrence of chronic foot injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain in the forefoot area caused by long-term local high stress.

[0034] It is worth mentioning that, if the orthographic projection of the first elastic member 211 on the plane perpendicular to the stacking direction does not completely fall within the orthographic projection of the pressure bladder 212 on the same plane, the transmission path for the load transmitted from the forefoot area of the wearer to the first elastic member 211 through the insole 300 would be interrupted, and distribution of the load is unbalanced. The load received at the edge part of the first elastic member 211 beyond the coverage range of the pressure bladder 212 cannot be transmitted to the pressure bladder 212 for in-plane dispersion. Under the action of cyclic loads under all working conditions of static standing and dynamic walking of the wearer, the first elastic member 211 would repeatedly undergo sharp changes in deformation at the covered boundary with the pressure bladder 212, thereby producing irreversible indentations and wrinkles at the boundary. With the increase of wearing time and load cycle times, the indentations and wrinkles would continue to deepen. The raised edges of the indentations and wrinkles would form new load concentration points, and the local load concentration points would be reversely transmitted to the forefoot area of the wearer through the insole 300, forming local compression points, which increases the peak pressure in the forefoot area and increases the local pressure bearing burden of the forefoot area.

[0035] Therefore, the projection of the first elastic member 211 being within the coverage range of the pressure bladder 212 could ensure that all loads received by each part of the first elastic member 211 can be completely transmitted to the pressure bladder 212 for in-plane dispersion, thereby avoiding irreversible indentations and wrinkles from being generated at the covered boundary of the first elastic member 211 with the pressure bladder 212 under the action of cyclic loads in all working conditions of static standing and dynamic walking of the wearer, and thus preventing such indentations and wrinkles from damaging the original tight fitting state between the first elastic member 211 and the lower surface of the insole 300. That is, it eliminates a gap formed between the first elastic member 211 and the lower surface of the insole 300, and thus prevents relative slippage between the insole 300 and the first elastic member 211 caused by the gap with the repeated actions of the foot during the switching between push-off and landing in the working condition of dynamic walking, thereby ensuring the stability and foot fit during wearing. In addition, it also avoids wear on the surface structure of the first elastic member 211 caused by continuous relative slippage, and thus ensures the service life of the first elastic member 211 and the structural stability thereof during long-term use. Furthermore, it avoids the formation of new load concentration points on the surface of the first elastic member 211, and eliminates local compression points formed by the reverse transmission of such local load concentration points to the forefoot area through the insole 300, which further ensures that the load-bearing state of the forefoot always meets the requirements of human foot physiological structure and biomechanics.

[0036] As a preferred implementation, referring to FIGS. 2, 3, 4, and 5, the cushioning component 220 includes a second elastic member 221 and a foam support 222. The second elastic member 221 is made of an elastic material meeting the requirements of absorbing the instantaneous impact load in the heel area, such as high-resilience polyurethane, silicon and other materials with excellent impact deformation recovery ability, energy absorption performance and wear resistance. The second elastic member 221 is arranged on the lower surface of the insole 300 facing the shoe body 100. Specifically, the second elastic member 221 is fixedly mounted on the lower surface of the heel part 330 of the insole 300 facing the shoe body 100, and forms an integrated impact load transmission structure with the heel part 330 of the insole 300.

[0037] The foam support 222 is located on a side of the second elastic member 221 facing the shoe body 100, and is fixedly mounted on the heel part 113 of the shoe body 100. The second elastic member 221 and the foam support 222 are stacked in an up-down direction, located at corresponding positions, and tightly attached / fit to each other, thereby ensuring smooth and stable transmission of the impact load between the second elastic member 221 and the foam support 222. After assembly, the insole 300, the second elastic member 221, the foam support 222 and the shoe body 100 form a stacked assembly structure from top to bottom.

[0038] In actual wearing, especially under the working condition of dynamic walking of heeled footwear products, the second elastic member 221 can receive the instantaneous impact load of heel landing transmitted from the insole 300, and make the impact load preliminarily cushioned and unloaded through its own elastic deformation characteristics, thereby pre-weakening the peak value of the impact load. In addition, the second elastic member 221 avoids foreign body sensation caused by direct contact between the foam support 222 and the insole 300, ensures the wearing flatness and foot fit of the heel area inside the shoe cavity 100a, and ensures that the impact energy absorption function of the cushioning component 220 can stably act on the heel area. Then, the foam support 222 receives the impact load preliminarily cushioned by the second elastic member 221, and further absorbs the mechanical energy generated by the impact load through the controllable compression deformation of its internal microporous structure, thereby greatly attenuating the peak value of the remaining impact load. As such, graded and progressive absorption and regulation of the instantaneous impact load of heel landing are enabled, which effectively solves the technical defect that existing heeled footwear products cannot fully and progressively absorb the instantaneous impact load in the heel area. It greatly reduces the instantaneous impact force borne by the calcaneus and heel fat pad when the heel lands, avoids atrophy of the heel fat pad caused by long-term repeated instantaneous impact, and reduces the occurrence of chronic injuries in the heel area such as calcaneal periostitis, calcaneal spurs and plantar fasciitis.

[0039] In addition, the impact load after being fully and progressively attenuated by the second elastic member 221 and the foam support 222 would not be transmitted upward along the human lower limb biomechanical line, which can effectively avoid the long-term repeated impact of the impact load on the proximal joints and bone structures such as knee joints, hip joints and spine, and reduce the long-term risk of degenerative diseases such as articular cartilage wear of lower limb joints. In addition, the wearer’s abnormal gait adopted to avoid the impact pain of heel landing can be prevented. It ensures that the wearer can maintain the complete gait actions of normal heel landing, arch support and forefoot push-off, and maintain the normal movement line and pressure balance of the ankle joint, and avoids problems such as ligament strain around the ankle joint, joint instability and habitual sprain caused by abnormal gait, which further reduces the occurrence of chronic foot injuries.

[0040] It is worth mentioning that the second elastic member 221 is fixedly mounted on the insole 300, and the foam support 222 is fixedly mounted on the shoe body 100. This arrangement can avoid displacement and offset of the cushioning component 220 during wearing, ensuring the stability and durability of the cushioning function. In addition, in cooperation with the detachable connection between the insole 300 and the shoe body 100, the normal operation of the cushioning component 220 would not be affected by the replacement of the insole 300, which further improves the practicability and adaptability of the shoe 1000 to different wearing groups.

[0041] Further, a stacking direction of the second elastic member 221 and the foam support 222 is the thickness direction T of the shoe body 100 and a direction along which the foot load is transmitted to the shoe body 100. The orthographic projection of the second elastic member 221 on a plane perpendicular to the stacking direction completely falls within the orthographic projection of the foam support 222 on the same plane. This could ensure that all instantaneous impact loads from the heel area received by the second elastic member 221 can be completely and smoothly transmitted to the foam support 222 for sufficient energy absorption and load attenuation, which effectively reduces the peak impact force when the heel lands, and makes the load-bearing state of the heel area more in line with the human foot physiological structure and lower limb biomechanical requirements during wearing of heeled footwear products. Accordingly, it slows down the occurrence speed of foot fatigue during long-term wearing of high-heeled shoes, reduces the instantaneous impact pain of the heel area under the working condition of dynamic walking, and reduces the occurrence of chronic injuries in the heel area such as atrophy of heel fat pad, calcaneal periostitis and plantar fasciitis caused by long-term local high impact load.

[0042] It is worth mentioning that, if the orthographic projection of the second elastic member 221 on the plane perpendicular to the stacking direction does not completely fall within the orthographic projection of the foam support 222 on the same plane, the transmission path for the impact load transmitted from the heel area of the wearer to the second elastic member 221 through the insole 300 would be interrupted, and distribution of the load is unbalanced. The instantaneous impact load received at the edge part of the second elastic member 221 beyond the coverage range of the foam support 222 cannot be transmitted to the foam support 222 for energy absorption and load attenuation. Under the action of cyclic loads generated during heel landing and push-off stages in the working condition of dynamic walking of the wearer, this unattenuated impact load would directly reversely act on a local heel area, forming a new impact load concentration point(s). Such new impact load concentration point(s) increases the peak impact force in the heel area and increases the local pressure bearing and impact burden of the heel. The second elastic member 221 would repeatedly undergo sharp changes in deformation at the covered boundary with the foam support 222, thereby producing irreversible indentations and wrinkles at the boundary. With the increase of wearing time and load cycle times, the indentations and wrinkles would continue to deepen, and the raised edges of the indentations and wrinkles would form additional load concentration points. These local load concentration points would be reversely transmitted to the heel area of the wearer through the insole 300, forming local compression and impact points, which further increases the peak pressure and instantaneous impact force in the heel area and aggravates the pressure bearing burden and impact pain of the heel area.

[0043] Therefore, the projection of the second elastic member 221 being within the coverage range of the foam support 222 could ensure that all impact loads received by each part of the second elastic member 221 can be completely transmitted to the foam support 222 for sufficient energy absorption and load attenuation, thereby avoiding irreversible indentations and wrinkles from being generated at the covered boundary of the second elastic member 221 with the foam support 222 under the action of cyclic loads in all working conditions of static standing and dynamic walking of the wearer, and thus preventing such indentations and wrinkles from damaging the original tight fitting state between the second elastic member 221 and the lower surface of the insole 300. That is, it eliminates a gap formed between the second elastic member 221 and the lower surface of the insole 300, and thus prevents relative slippage between the insole 300 and the second elastic member 221 caused by the gap with the repeated actions of the foot during the switching between push-off and landing in the working condition of dynamic walking, thereby ensuring the stability and foot fit during wearing. In addition, it also avoids wear on the surface structure of the second elastic member 221 caused by continuous relative slippage, and thus ensures the service life of the second elastic member 221 and the structural stability thereof during long-term use. Furthermore, it avoids the formation of new load concentration points on the surface of the second elastic member 221, and eliminates local compression and impact points formed by the reverse transmission of such local load concentration points to the heel area through the insole 300, which further ensures that the load-bearing state of the heel always meets the requirements of human foot physiological structure and lower limb biomechanics.

[0044] Preferably, referring to FIGS. 2, 3, 4, and 5, the forefoot part 310, the midfoot arch part 320 and the heel part 330 of the insole 300 are sequentially bent towards the side of the foot and are smoothly connected, in such a manner that the upper surface of the insole 300 facing the shoe cavity 100a forms a continuous transitional curved surface matching the physiological contour of the bottom surface of the human foot. The physiological contour of the bottom surface of the human foot refers to a three-dimensional curved surface of the sole when the human foot is naturally stretched and in a normal load-bearing state in a case where the foot is wearing a heeled footwear product. This arrangement enables the upper surface of the insole 300 to completely and tightly fit with the sole of the wearer’s foot. Under all working conditions of static standing and dynamic walking, it can stabilize the relative position of the wearer’s foot in the shoe cavity 100a, and avoid problems such as excessive compression of the forefoot area and fixation failure of the heel area caused by forward tilting and slippage of the foot during wearing of heeled footwear products. In addition, it can ensure that all loads generated by the foot can be evenly and stably transmitted downward through the insole 300 to the pressure dispersion component 210 and the cushioning component 220 of the comfort system 200, thereby ensuring that each of the in-plane dispersion of the concentrated compressive stress in the forefoot area by the pressure dispersion component 210 and the graded absorption of the instantaneous impact load of the heel by the cushioning component 220 can evenly act on the entire corresponding area of the sole.

[0045] In addition, since the forefoot part 310, the midfoot arch part 320 and the heel part 330, which are sequentially bent and smoothly connected, form the transitional curved surface matching the physiological contour of the sole, it can provide for the arch fit support in line with the physiological structure on the basis of ensuring the tight fit between the insole 300 and the sole, thereby relieving the continuous tension of the arch muscle group and calf muscle group when wearing heeled footwear products, slowing down the occurrence speed of foot fatigue, reducing the occurrence of chronic foot injuries such as metatarsal pain, metatarsal stress injury, atrophy of heel fat pad, plantar fasciitis and arch function degradation, and further improving the wearing comfort of heeled footwear products.

[0046] It is notable that the transitional curved surface matching the physiological contour of the sole may be differentially set and adjusted according to the foot shape characteristics and arch states of different wearing groups; and in combination with the detachable connection between the insole 300 and the shoe body 100, the adaptability of heeled footwear products to wearers of different foot shapes is further improved, meeting personalized wearing and support needs.

[0047] In addition, referring to FIGS. 2, 3, 4, and 5, the shoe 1000 of the embodiments of the disclosure further includes a first fastener 410 and a second fastener 420. The first fastener 410 is fixedly connected to the lower surface of the insole 300 facing the comfort system 200. The second fastener 420 extends along a length direction from the forefoot part 111 to the heel part 113 of the shoe body 100, and the second fastener 420 is fixedly connected to the arch part 112 of the shoe body 100. The first fastener 410 and the second fastener 420 are touch and close fasteners and fastened together through engagement, to realize detachable fixation between the insole 300 and the shoe body 100. It is staggered from the pressure dispersion component 210 located at the forefoot part 111 and the cushioning component 220 located the heel part 113, and it would not cause structural interference to the pressure dispersion component 210 and the cushioning component 220, thereby ensuring the stability of the core functions of the comfort system 200. In addition, the arch part 112 is an area with the smallest deformation and the lowest load fluctuation in the shoe body 100 under all walking working conditions, which can effectively ensure the stability of the touch-and-close fastening, avoid slippage and offset of the insole 300 under the action of cyclic loads, and ensure that no local foreign body sensation is produced due to the first fastener 410 and the second fastener 420, i.e., ensure the wearing flatness inside the shoe cavity 100a. Furthermore, the engagement of touch and close fasteners is easy to operate, which facilitates rapid disassembly and assembly of the insole 300, facilitates the wearer to replace the insole 300, and also facilitates the cleaning of the insole 300 after disassembly.

[0048] The first fastener 410 and the second fastener 420 herein are preferably a pair of matching hook-and-loop tapes, that is, the first fastener 410 and the second fastener 420 are respectively a hook tape and a loop tape that are capable of being fastened together and match each other. During assembly, the insole 300 is placed inside the shoe cavity 100a, and the insole 300 is pressed at the arch part 112 to engage the first fastener 410 with the second fastener 420, thereby realizing the positioning and fixation of the insole 300. In addition, the insole 300 may be pulled at the arch part 112 to separate the first fastener 410 from the second fastener 420, thereby disassembling the insole 300.

[0049] In addition to the above hook-and-loop engagement, other conventional connections in the footwear field may also be adopted for the detachable connection, including but not limited to: magnetic connection, that is, magnetic parts are respectively arranged at corresponding positions of the insole 300 and the shoe body 100 to realize detachable fixation through magnetic fit; and snap fit, that is, a deformable protrusion(s) is arranged on the bottom surface of the insole 300, and a groove(s) matching the protrusion(s) is arranged at the corresponding position of the shoe body 100 to realize detachable fixation through interlocking of the protrusion(s) and groove(s).

[0050] As a preferred implementation, referring to FIGS. 2 and 3, the shoe body 100 includes an upper 121, a midsole 122 and an outsole 123. The outsole 123 and the midsole 122 are stacked along the thickness direction T of the shoe body 100, and the outsole 123 and the midsole 122 are jointly formed into the forefoot part 111, the arch part 112 and the heel part 113. Specifically, the length directions of the midsole 122 and the outsole 123 are consistent with the length direction L of the shoe body 100. The midsole 122 is sequentially divided, along its own length direction, into a first forefoot part 1221 located at a position corresponding to the forefoot area, a first longitudinal arch part 1222 located at a position corresponding to the arch area, and a first heel part 1223 located at a position corresponding to the heel area. The outsole 123 is sequentially divided, along its own length direction, into a second forefoot part 1231 located at a position corresponding to the first forefoot part 1221, a second longitudinal arch part 1232 located at a position corresponding to the first longitudinal arch part 1222, and a second heel part 1233 located at a position corresponding to the position of the first heel part 1223. Then, along the thickness direction T, the first forefoot part 1221 and the second forefoot part 1231 are stacked to form the forefoot part 111 of the shoe body 100, the first longitudinal arch part 1222 and the second longitudinal arch part 1232 are stacked to form the arch part 112 of the shoe body 100, and the first heel part 1223 and the second heel part 1233 are stacked to form the heel part 113 of the shoe body 100.

[0051] Further, referring to FIGS. 1, 2, and 3, the midsole 122 is fixedly connected with the upper 121, and the midsole 122 and the upper 121 enclose the shoe cavity 100a of the shoe body 100, providing a stable accommodation space for the foot. The midsole 122 serves as a bearing base in the shoe cavity 100a, and provides a stable installation reference and structural support for the pressure bladder 212 of the pressure dispersion component 210, the foam support 222 of the cushioning component 220 and the second fastener 420. The second fastener 420 is fixedly arranged on a surface of the midsole 122 facing the shoe cavity 100a, so that the insole 300 can be detachably connected to the midsole 122 through the touch-and-close fastening of the first fastener 410 and the second fastener 420. In addition, the peripheral side surface of the insole 300 abuts against and fits with the inner side surface of the upper 121. The cushioning component 220 and the pressure dispersion component 210 are both fixedly mounted on the midsole 122, that is, the pressure bladder 212 is fixedly mounted on the first forefoot part 1221, and the foam support 222 is fixedly mounted on the first heel part 1223, ensuring that the pressure bladder 212 and the foam support 222 are always maintained at their fixed installation positions and have fixed deformation spaces under the action of cyclic loads in all working conditions of static standing and dynamic walking of high-heeled shoes.

[0052] The outsole 123 serves as a functional base in direct contact with the ground, and it plays roles in wear resistance, anti-slip and external impact protection. The material hardness, structural thickness, bending stiffness and deformation characteristics selected for the outsole 123 are different from those of the midsole 122. In this way, the outsole 123 and the midsole 122 are stacked to form the forefoot part 111, the arch part 112 and the heel part 113, which enables the shoe body 100 to provide, along the length direction L, continuous height difference and radian in line with the heel height design requirements of high-heeled shoes, ensuring that the foot load can be continuously and stably transmitted along both the length direction L and thickness direction T of the shoe body 100 during the complete gait cycle of heel landing, arch support and forefoot push-off, thereby being more in line with the lower limb biomechanical transmission law during human walking.

[0053] It is worth mentioning that the peripheral side surface of the insole 300 abuts against and fits with the inner side surface of the upper 121, which provides all-round auxiliary position limit for the insole 300 in the shoe cavity 100a, and further prevents the displacement of the insole 300 during the gait cycles. As such, it ensures that the first elastic member 211 and the second elastic member 221 fixed on the lower surface of the insole 300 can be always maintained at positions accurately corresponding to positions of the pressure bladder 212 and the foam support 222 on the midsole 122 respectively in the up-down direction, so that the orthographic projection of the first elastic member 211 on the plane perpendicular to the stacking direction always completely falls within the coverage range of the pressure bladder 212, and the orthographic projection of the second elastic member 221 always completely falls within the coverage range of the foam support 222, thereby avoiding projection misalignment caused by displacement of the insole 300, and ensuring that the functions of the pressure dispersion component 210 and the cushioning component 220 can take effect stably for a long time.

[0054] In addition, the all-round abutment and fitting between the peripheral side surface of the insole 300 and the inner side surface of the upper 121 in combination with the upper 121 can provide large-area wrapping for the foot, which improves the positional stability of the foot in the shoe cavity 100a. In one aspect, this can avoid problems such as foot rubbing and scratch caused by relative displacement between the foot and the upper 121 during walking, and improve the long-term wearing comfort of high-heeled shoes. In another aspect, this can also effectively inhibit the forward tilting and slippage of the foot caused by the forward shift of the human body’s center of gravity during wearing of high-heeled shoes, reduce excessive pressure bearing and compression in the forefoot area, and assist the pressure dispersion component 210 to further relieve the concentrated compressive stress in the forefoot area. Furthermore, it ensures that all loads generated by the foot are evenly and stably transmitted downward through the insole 300 to the pressure dispersion component 210 and the cushioning component 220 of the comfort system 200, avoids foot pressure imbalance caused by lateral load transmission through the upper 121, makes the foot load-bearing state always meet the requirements of human physiological structure and lower limb biomechanics, and enables the complete gait cycle of normal heel landing, arch support and forefoot push-off to be maintained.

[0055] Furthermore, in the embodiments, the first forefoot part 1221, the first longitudinal arch part 1222 and the first heel part 1223 of the midsole 122 are sequentially bent towards the side of the foot and are smoothly connected, in such a manner that the upper surface of the midsole 122 facing the shoe cavity 100a forms a continuous transitional curved surface which matches the physiological contour of the bottom surface of the foot of a person wearing the high-heeled shoe. This makes the upper surface of the midsole 122 and the lower surface of the insole 300 fully and tightly fit without a gap therebetween, which provides for the sole a continuous support base in line with ergonomic requirements in the wearing state of high-heeled shoes. In addition, this adapts to the three-dimensional load bearing of the sole formed by ankle plantar flexion and forward shift of the center of gravity when a person wears the high-heeled shoe, enables the midsole 122 to provide uniform support for the forefoot area, the arch area and the heel area, and ensures the uniformity and continuity of transmission of the sole load through the insole 300 to the midsole 122 and the comfort system 200. Furthermore, it provides for the arch area continuous support in line with the physiological structure. In combination with the insole 300 matching the physiological contour of the sole, it is more conducive to relieving the continuous tension and spasm of the arch muscle group and calf muscle group caused by long-term abnormal pressure, slows down the foot fatigue during long-term wearing of high-heeled shoes, and reduces the occurrence of chronic foot injuries such as metatarsal pain, metatarsal stress injury, atrophy of heel fat pad, plantar fasciitis and arch function degradation.

[0056] In the aforementioned embodiments, the pressure bladder 212 includes a first bladder surface (bladder film) and a second bladder surface. The second bladder surface and the first bladder surface are opposite to each other along the thickness direction T of the shoe body 100. The peripheral edges of the second bladder surface are hermetically and fixedly connected with the peripheral edges of the first bladder surface, in such a manner that the first bladder surface and the second bladder surface enclose a closed bladder chamber that can be filled with fluid medium. This effectively avoids problems such as fluid medium leakage and pressure attenuation of the bladder chamber under the action of long-term cyclic loads, and ensures the long-term stability of the pressure dispersion function of the pressure bladder 212. It is notable that the fluid medium is gas or liquid. As a preferred implementation of the gas medium, dry high-purity nitrogen with stable chemical properties, low viscosity and fast deformation recovery response may be selected. As a preferred implementation of the liquid medium, dimethyl silicone oil with low compressibility, excellent damping characteristics and good load distribution uniformity may be selected.

[0057] Further, as shown in FIG. 4, one of the first bladder surface and the second bladder surface is fixedly connected to the first forefoot part 1221 of the midsole 122. The fixed connection here may be realized by bonding with an adhesive or through hot-melt film hot-pressing lamination process which are conventional in the field of footwear products. The other one of the first bladder surface and the second bladder surface abuts against and fits with the first elastic member 211, so as to ensure that the foot load can be completely and evenly applied to the pressure bladder 212 after being transmitted through the insole 300 and the first elastic member 211. In this case, by utilizing the physical characteristics that the fluid medium filled in the bladder chamber can flow freely with the load distribution and the pressure is evenly transmitted, the local concentrated load received from the first elastic member 211 can be converted into a uniformly distributed in-plane load within the entire bladder chamber. Under the working condition of static standing, it can effectively disperse the continuous concentrated load in the forefoot area, greatly reduce the peak pressure in the forefoot, and relieve the continuous pressure bearing burden of the forefoot soft tissue and metatarsals. During the push-off stage of dynamic walking, the load distribution can be adaptively adjusted through the real-time flow of the fluid medium with the dynamic change of the load concentration point in the forefoot during the gait cycle, the pressure uniformity of the forefoot area is always maintained, and metatarsal impact injury caused by the sudden increase of local load peak under dynamic working conditions is avoided.

[0058] As a further preferred implementation, along the width direction of the midsole 122, at least one side edge of the first bladder surface is adjacent to a corresponding side edge of the midsole 122. The width direction of the midsole 122 is a horizontal direction perpendicular to the length direction L and the thickness direction T of the shoe body 100, and is consistent with the lateral expansion direction of the human foot in a naturally stretched state.

[0059] This arrangement enables the effective action range of the pressure bladder 212 to extend maximally to the internal and external edges of the forefoot part 111 along the width direction of the midsole 122, matching the width size of the first forefoot part 1221, and further matching the pressure bearing area of the human forefoot composed of the first to fifth metatarsal heads. Also, this ensures that all areas in the width direction of the first elastic member 211 provided corresponding to the pressure bladder 212 can fall within the coverage range of the pressure bladder 212, which effectively prevents local load concentration points formed by protrusions of indentations and wrinkles from being reversely transmitted to the forefoot area through the insole 300 to cause local compression, and ensures the stability of the pressure dispersion component 210. Furthermore, in cooperation with the physical characteristic that the fluid medium in the pressure bladder 212 can flow freely, the flow space of the fluid medium along the forefoot pressure bearing area in the width direction is expanded, which enables the local concentrated load received from the first elastic member 211 to get in-plane uniform dispersion within the entire width range of the midsole 122, thereby eliminating the pressure bearing blind area in the width direction of the forefoot part 111. Especially, for the instantaneous concentrated load generated on the internal and external edges of the forefoot part 111 under the working conditions of turning, starting and stopping, and gait switching during dynamic walking of high-heeled shoes, as well as the local pressure bearing on the internal and external sides of the forefoot caused by the intensified foot inversion and eversion due to the decreased foot stability when wearing stiletto high-heeled shoes, pressure dispersion and regulation can be performed, which greatly reduces the peak pressure of the entire forefoot area, further relieves the continuous pressure bearing burden of the forefoot metatarsals and soft tissue, slows down the occurrence speed of foot fatigue during long-term wearing of high-heeled shoes, and reduces the occurrence of chronic injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain in the forefoot.

[0060] Preferably, referring to FIG. 5, the first elastic member 211 is arranged on a side of the forefoot part 310 close to the midfoot arch part 320, in such a manner that the first elastic member 211 at least partially covers the force application area of the metatarsophalangeal joints of the human foot on the forefoot part 310. The pressure bearing area of the metatarsal heads corresponding to the metatarsophalangeal joints is the core area where the load is concentrated, and also the area where continuous compressive stress is concentrated under the working condition of static standing, the force application area with the highest propulsion stress peak during the push-off stage of dynamic walking, and the area suffering from chronic injuries such as metatarsal pain, metatarsal stress injury and soft tissue strain in the forefoot.

[0061] This arrangement enables the first elastic member 211 to directly and accurately receive the concentrated load transmitted from the force application area of the metatarsophalangeal joints, and directly apply its own elastic cushioning function to the force application area of the metatarsophalangeal joints. During actual wearing, the concentrated load in the force application area of the metatarsophalangeal joints can be received by the first elastic member 211 at the first time after being transmitted through the insole 300, and preliminary cushioning and unloading can be implemented through the elastic deformation of the first elastic member 211 to pre-weaken the local load peak; then, the preliminarily regulated load is evenly transmitted to the pressure bladder 212 below, and in-plane uniform dispersion is achieved through the flow of the fluid medium in the pressure bladder 212, which further reduces the peak pressure in the core pressure bearing area of the forefoot. This effectively relieves the continuous compression feeling in the force application area of the metatarsophalangeal joints under the working condition of static standing, reduces the instantaneous impact of the propulsion stress on the metatarsophalangeal joints and metatarsals during the push-off stage of dynamic walking, slows down the occurrence speed of foot fatigue during long-term wearing of high-heeled shoes, and reduces the occurrence of chronic injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain in the forefoot.

[0062] It is worth mentioning that the first elastic member 211 is arranged to precisely cover the force application area of the metatarsophalangeal joints, which can effectively relieve the pain of the wearer caused by continuous compression of the metatarsophalangeal joints, prevent the wearer from adjusting the foot posture to avoid local pain and adopting an abnormal gait, ensure that the wearer can maintain the complete gait cycle of normal heel landing, arch support and forefoot push-off, and reduce the probability of problems such as ligament strain around the ankle joint, joint instability and habitual sprain caused by abnormal gait. In addition, it can avoid pressure imbalance of the foot arch caused by abnormal gait, ensure the normal support function of the arch, and reduce the long-term risk of arch function degradation.

[0063] In the embodiments of the disclosure, referring to FIG. 4, since the pressure bladder 212 and the first elastic member 211 are stacked and the orthographic projection of the first elastic member 211 in the stacking direction completely falls within the coverage range of the pressure bladder 212, the pressure bladder 212 is also arranged on a side of the first forefoot part 1221 of the midsole 122 close to the first longitudinal arch part 1222, in such a manner that the pressure bladder 212 at least partially covers the force application area of the metatarsophalangeal joints of the human foot on the first forefoot part 1221.

[0064] In this way, both the pressure bladder 212 and the first elastic member 211 are anchored on a position of the forefoot part 111 close to the arch part 112, so that both the pressure bladder 212 and the first elastic member 211 can cover the force application area of the metatarsophalangeal joints. In actual wearing, the concentrated load in the force application area of the metatarsophalangeal joints is transmitted to the first elastic member 211 through the insole 300, and after preliminary cushioning and unloading through the elastic deformation of the first elastic member 211 to weaken the local load peak, the load is directly transmitted to the pressure bladder 212. By virtue of the physical characteristics of uniform pressure transmission of the fluid medium in the bladder chamber, the concentrated load originally concentrated on the metatarsophalangeal joints is converted into an in-plane load evenly distributed in the entire pressure bearing area of the forefoot metatarsal heads, which greatly reduces the peak pressure in the metatarsophalangeal joint area, effectively relieves the continuous pressure bearing burden of the metatarsophalangeal joints and metatarsals under the working condition of static standing, reduces the instantaneous impact of the propulsion stress on the metatarsophalangeal joints during the push-off stage of dynamic walking, slows down the occurrence speed of foot fatigue during long-term wearing of high-heeled shoes, and reduces the occurrence of chronic injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain in the forefoot. In addition, it also meets the forefoot load distribution characteristics of high-heeled shoes of different heel heights, and especially under the working condition of decreased foot stability when wearing stiletto high-heeled shoes, the instantaneous load on the internal and external edges of the metatarsophalangeal joints can be dispersed through the adaptive flow of the fluid medium, maintaining the pressure uniformity of the internal and external sides of the forefoot.

[0065] Existing research data on ergonomics and plantar pressure testing of high-heeled shoes show that the instantaneous impact load during the heel landing stage in the gait cycle of high-heeled shoes may reach 1.2 to 2.5 times the human body weight, and the peak impact load increases significantly with the increase of heel height. Furthermore, when wearing stiletto high-heeled shoes, due to the greatly reduced contact support surface between the heel and the ground, the heel is prone to instantaneous deflection of inversion and eversion when landing, which results in significant local impact load concentration on the medial, lateral and rear edges of the heel along the circumferential direction thereof.

[0066] In view of the above technical problems, as a preferred implementation, referring to FIG. 5, along the circumferential direction of the heel part 330 of the insole 300, at least one side edge of the second elastic member 221 is adjacent to a corresponding side edge of the heel part 330. The circumferential direction of the heel part 330 here is a direction surrounding the outer contour of the heel part 330, and a plane in which this direction is located is perpendicular to the thickness direction T of the shoe body 100. In this way, in the circumferential direction of the heel part 330, the effective action range of the second elastic member 221 can be maximally extended to the corresponding edge of the heel area, which completely matches the circumferential physiological distribution of the human heel calcaneus and heel fat pad, and is more in line with the lower limb biomechanical stress characteristics of the human foot when wearing high-heeled shoes. Thus, it can stably receive the circumferential instantaneous impact load generated when the heel lands and apply preliminary cushioning and unloading to it, and avoid the failure of effective cushioning of the circumferential edge load caused by insufficient coverage of the second elastic member 221. It can thus comprehensively reduce the peak impact load in the heel area, and reduce the instantaneous axial and lateral impact force borne by the calcaneus and heel fat pad.

[0067] Further, as shown in FIG. 4, along the circumferential direction of the first heel part 1223, at least one side edge of the foam support 222 is adjacent to a corresponding side edge of the first heel part 1223, in such a manner that along the circumferential direction of the first heel part 1223, the effective action range of the foam support 222 can be maximally extended to the corresponding edge of the first heel part 1223, matching the circumferential outer contour of the first heel part 1223. As such, it completely matches the circumferential physiological pressure bearing distribution of the human heel calcaneus and heel fat pad, and is in line with the lower limb biomechanical stress characteristics of the human foot when wearing high-heeled shoes.

[0068] Combined with the aforementioned arrangement in which the second elastic member 221 is adjacent to the heel part 330 in the circumferential direction, it can be ensured that the orthographic projection of all areas of the second elastic member 221 along the circumferential direction on the plane perpendicular to the stacking direction completely falls within the coverage range of the foam support 222, and avoid the aforementioned problem that the instantaneous impact load cannot be transmitted to the foam support 222 for energy absorption and load attenuation which is caused by a fact that the projection of the second elastic member 221 exceeds the coverage range of the foam support 222. Accordingly, it can reduce the peak impact load in the full-circumference of the heel area. In addition, it is conducive to effectively inhibiting the instantaneous deflection trend of inversion and eversion of the heel when landing that is caused due to the greatly reduced contact support surface between the heel and the ground when wearing stiletto high-heeled shoes, improves the foot stability during heel landing, and reduces the occurrence of ligament strain around the ankle joint, joint instability and habitual sprain caused by gait deflection.

[0069] In addition, the effective energy absorption area of the microporous structure of the foam support 222 along the circumferential direction of the heel can be expanded, so that the circumferential impact load after undergoing preliminary cushioning by the second elastic member 221 can be evenly transmitted to the corresponding area of the foam support 222, and sufficient energy absorption and load attenuation are enabled through the controllable compression deformation of the microporous structure. This further reduces the instantaneous axial and lateral impact force borne by the calcaneus and heel fat pad when the heel lands, avoids atrophy of the heel fat pad caused by long-term repeated instantaneous impact, and reduces the probability of chronic injuries in the heel area such as calcaneal periostitis, calcaneal spurs and plantar fasciitis. Also, it effectively avoids the long-term impact of the impact load on the proximal joints and bone structures such as knee joints, hip joints and spine, and reduces the long-term risk of degenerative diseases such as articular cartilage wear of lower limb joints.

[0070] Preferably, referring to FIGS. 2, 3, 4, and 5, the first forefoot part 1221 of the midsole 122 is provided with a first limiting groove 1224a, and the shape, contour and size of the first limiting groove 1224a match those of the pressure bladder 212; and the first heel part 1223 of the midsole 122 is provided with a second limiting groove 1224b, and the shape, contour and size of the second limiting groove 1224b match those of the foam support 222. The pressure bladder 212 is fixedly embedded in the first limiting groove 1224a, and the foam support 222 is fixedly embedded in the second limiting groove 1224b.

[0071] With this arrangement, through the first limiting groove 1224a and the second limiting groove 1224b, the pressure bladder 212 and the foam support 222 can be positioned and installed during the assembly stage, thereby ensuring that the installation position of the pressure bladder 212 on the first forefoot part 1221 can accurately match the force application area of the metatarsophalangeal joints of the human body, and that the installation position of the foam support 222 on the first heel part 1223 can accurately match the circumferential pressure bearing area corresponding to the calcaneus and heel fat pad of the human body. In addition, this also ensures that the orthographic projections of the pressure bladder 212 and the first elastic member 211 in the plane perpendicular to the stacking direction always maintain an accurate up‑down correspondence, and the orthographic projections of the foam support 222 and the second elastic member 221 in the plane perpendicular to the stacking direction always maintain an accurate up‑ down correspondence, thereby avoiding installation misalignment caused by installation deviations of the pressure bladder 212 and the foam support 222, and in turn avoiding a series of technical problems caused by installation misalignment, such as interrupted load transmission paths at the edges of the first elastic member 211 and the second elastic member 221, local load concentration, and formation of irreversible indentations and wrinkles. It guarantees the stable implementation of various functions of the pressure dispersion component 210 and the cushioning component 220.

[0072] During actual wearing, in the gait cycle of dynamic walking, forward‑backward shear loads are generated in the forefoot push‑off stage, lateral shear loads are generated at the medial and lateral sides of the forefoot under working conditions of turning, starting and stopping, and axial impact loads and circumferential deflection shear loads are generated in the heel landing stage. The circumferential groove walls of the first limiting groove 1224a and the second limiting groove 1224b can also provide circumferential shear‑resistant constraints for the pressure bladder 212 and the foam support 222 respectively embedded therein, which effectively reduces the influence of multi‑directional shear loads on the installation positions of the pressure bladder 212 and the foam support 222 under cyclic working conditions, prevents displacement, offset, edge warping or falling off of the pressure bladder 212 and the foam support 222 under long‑term cyclic loads, and thus ensures the installation position stability and functional durability of the pressure dispersion component 210 and the cushioning component 220 under cyclic loads of all working conditions. In addition, it can reduce the shear stress on the connection surfaces between each of the pressure bladder 212 and the foam support 222 and the midsole 122, reduce the risk of connection failure during long‑term use, and extend the service life of the shoe 1000.

[0073] It is worth mentioning that the circumferential groove wall of the first limiting groove 1224a can provide circumferential deformation constraints for the pressure bladder 212, to limit excessive radial deformation of the pressure bladder 212 under cyclic loads. As such, it ensures that the fluid medium in the bladder chamber can flow evenly within the preset pressure‑bearing range, maintains the physical property of uniform pressure transmission, and avoids problems such as uneven distribution of the fluid medium, local pressure attenuation and pressure dispersion function failure caused by excessive deformation of the bladder chamber, thereby guaranteeing the long‑term stability of the in-plane dispersion of the concentrated compressive stress on the forefoot. Similarly, the circumferential groove wall of the second limiting groove 1224b can provide circumferential support constraints for the foam support 222, to prevent circumferential edge collapse and permanent plastic deformation of the foam support 222 during repeated impact compression. As such, it maintains the controllable compression deformation capability of the internal microporous structure of the foam support 222, and ensures long‑term stability of the impact energy absorption efficiency of the foam support. In addition, it enables the circumferential impact loads received by the foam support 222 to be evenly transmitted to the internal microporous structure for energy absorption, which further improves the effect of graded absorption of instantaneous impact loads on the heel, and comprehensively reduces the peak impact force when the heel lands.

[0074] It is notable that, in order to achieve stable fixation of the pressure bladder 212 inside the first limiting groove 1224a and stable fixation of the foam support 222 inside the second limiting groove 1224b, prevent loosening, displacement, warping or separation failure under long‑term cyclic loads, and ensure long‑term stable effectiveness of the pressure dispersion and cushioning functions, in the embodiments, any conventional connection method in the field of footwear products may be used to reinforce the connection between the pressure bladder 212 and the first limiting groove 1224a, and the connection between the foam support 222 and the second limiting groove 1224b. Exemplary reinforcement methods include but are not limited to: bonding reinforcement through an adhesive, and composite reinforcement through hot melting. For the bonding reinforcement through an adhesive, structural adhesives used in the field of footwear products, such as polyurethane adhesives and neoprene adhesives, are evenly coated on the inner wall surfaces of the first limiting groove 1224a and the outer surfaces of the pressure bladder 212, as well as the inner wall surfaces of the second limiting groove 1224b and the outer surfaces of the foam support 222. For the composite reinforcement through hot melting, conventional hot‑melt adhesive films in the field of footwear products are placed between the groove bottom of the first limiting groove 1224a and the bottom surface of the pressure bladder 212, and between the groove bottom of the second limiting groove 1224b and the bottom surface of the foam support 222 respectively; and after hot pressing, the hot‑melt adhesive films are melt and then cool down and solidify to achieve bonding and reinforcement between each of the pressure bladder 212 and the foam support 222 and its corresponding limiting groove. The above reinforcement methods are only exemplary. The embodiments may adopt any reinforcement method in the field of footwear products to achieve stable fixation of each of the pressure bladder 212 and the foam support 222 with its corresponding groove, which is not limited to the above examples.

[0075] It is notable that, as shown in FIG. 4, a side of the pressure bladder 212 facing the first elastic member 211 at least partially protrudes out of the groove opening of the first limiting groove 1224a, and a side of the foam support 222 facing the second elastic member 221 at least partially protrudes out of the groove opening of the second limiting groove 1224b, so that there is an interference pre‑press fit between the pressure bladder 212 and the first elastic member 211, and an interference pre‑press fit between the foam support 222 and the second elastic member 221. Thus, under cyclic loads of all working conditions of static standing and dynamic walking, the fit between the pressure bladder 212 and the first elastic member 211 is always maintained without a gap therebetween, and the fit between the foam support 222 and the second elastic member 221 is always maintained without a gap therebetween, thereby ensuring continuous, smooth and lag‑free transmission of foot loads from the insole 300 and the first elastic member 211 to the pressure bladder 212, and continuous, smooth and lag‑free transmission of instantaneous impact loads on the heel from the insole 300 and the second elastic member 221 to the foam support 222, and thus ensuring that the functions of the pressure dispersion component 210 and the cushioning component 220 can take effect stably in all stages of the gait cycle. In addition, through adaptive adjustment of their own elastic deformation, it can compensate for the thickness tolerances of insoles 300 of different specifications, dimensional deviations during assembly, and the wear of the insole 300, the first elastic member 211 and the second elastic member 221 during long‑term use, thereby ensuring that, throughout the whole life cycle in which the insole 300 is repeatedly disassembled and assembled and replaced with other insoles 300 of different specifications, the pressure bladder 212 and the first elastic member 211 always maintain a stable pre‑press fit state, and the foam support 222 and the second elastic member 221 always maintain a stable pre‑press fit state, which guarantees the long‑term stability of the functions of the pressure dispersion component 210 and the cushioning component 220.

[0076] It is worth mentioning that the pre‑press fit state may enable a stable initial pre‑tightening pressure inside the bladder chamber of the pressure bladder 212. When local concentrated loads are transmitted to the pressure bladder 212 through the first elastic member 211, the fluid medium in the bladder chamber may respond quickly and flow freely on the basis of the pre‑tightening pressure, which evenly disperses the local concentrated loads to the entire forefoot pressure bearing area, and avoids problems such as delayed response of the fluid medium and untimely load dispersion caused by a gap between the pressure bladder 212 and the first elastic member 211 generated during assembly. This further improves the effect of in-plane dispersion of the concentrated compressive stress on the forefoot, significantly reduces the peak pressure in the forefoot area, relieves the continuous compression feeling in the forefoot area under the working condition of static standing and the instantaneous impact loads in the forefoot area during the push‑off stage of dynamic walking, slows down the occurrence speed of foot fatigue, and reduces the occurrence of chronic injuries such as metatarsal pain, metatarsal stress injury and forefoot soft tissue strain.

[0077] In addition, the pre‑press fit state can keep the foam support 222 in a stable pre‑compressed state before receiving the instantaneous impact load generated when the heel lands. When the impact load is transmitted to the foam support 222 through the second elastic member 221, the internal microporous structure of the foam support can directly get controllable compression deformation to quickly absorb the mechanical energy generated by the impact load. This eliminates the idle stroke of impact energy absorption that would otherwise be caused by a gap between the foam support 222 and the second elastic member 221. It further improves the graded absorption efficiency of impact loads, greatly reduces the peak impact load when the heel lands, lowers the instantaneous axial and lateral impact forces borne by the calcaneus and heel fat pad, avoids atrophy of heel fat pad caused by long‑term repeated instantaneous impacts, and reduces the probability of chronic heel injuries such as calcaneal periostitis, calcaneal spurs and plantar fasciitis.

[0078] Preferably, the first forefoot part 1221 of the midsole 122 is provided with a foam layer. The foam layer is located on a side of the pressure bladder 212 away from the first longitudinal arch part 1222, to correspondingly cover the toe area at the front end of the forefoot on the side of the pressure bladder 212 away from the first longitudinal arch part 1222. The foam layer may apply, through its own elastic deformation characteristics, cushioning, unloading and in-plane dispersion to the continuous compression loads and dynamic instantaneous concentrated loads borne by the phalanges and toe area at the front end of the forefoot. This effectively relieves the continuous compression feeling in the toe area at the front end of the forefoot, reduces the occurrence of toe numbness, soft tissue strain at the front end of the forefoot, phalangeal stress discomfort and other problems caused by continuous compression and load concentration during long‑term wearing, and further improves the wearing comfort of footwear products.

[0079] It is notable that the foam layer is preferably made of SBR latex foam. SBR latex foam has uniform and stable cell structures, excellent elastic deformation recovery performance and low compression set. Under all working conditions of static continuous pressure bearing and dynamic cyclic impact, the foam layer can provide, through its own controllable compression deformation, stable cushioning and in-plane uniform dispersion to local concentrated loads and lateral compression loads in the toe area at the front end of the forefoot, and effectively reduce the load peak in the toe area at the front end of the forefoot. In addition, the foam layer can cooperate with its adjacent pressure bladder 212, to ensure the continuity and consistency of the cushioning and support performance of the entire forefoot area. Furthermore, SBR latex foam also has excellent fatigue resistance and aging resistance, can maintain stable structural performance and cushioning function under long‑term cyclic loads, and complies with footwear wearing safety and environmental protection specifications. The preparation material of the foam layer in the embodiments is not limited to the above preferred example, and other conventional foam materials with cushioning and support performance in the field of footwear products may be selected according to product performance indicators, wearing scenarios and design requirements.

[0080] Further, along the circumferential direction of the first forefoot part 1221 of the midsole 122, the outer edge of the foam layer is preferably adjacent to or flush with a corresponding side edge of the first forefoot part 1221, so that along the circumferential direction of the first forefoot part 1221, the effective action range of the foam layer extends maximally to the all width-wise edges of the first forefoot part 1221, thereby completely covering the circumferential pressure bearing range of the phalanges and toe area at the front end of the forefoot, and meeting the physiological contour of the toe area at the front end of the forefoot and the pressure distribution characteristics under all working conditions of wearing high‑heeled shoes. Therefore, the foam layer enables both cushioning and load dispersion through its elastic deformation, which effectively reduces the peak pressure in the entire toe area at the front end of the forefoot, relieves the continuous compression feeling in the entire toe area at the front end of the forefoot, and reduces the occurrence of discomfort such as toe numbness and soft tissue strain at the front end of the forefoot.

[0081] In the embodiments of the disclosure, the insole 300 further includes a fiber fabric layer 360. The fiber fabric layer 360 is preferably made of microfiber sheepskin leather, and may also be made of conventional breathable and wear‑resistant fabric materials in the field of footwear products, including polyester filament fabric, nylon blended fabric, and microfiber non‑woven fabric. It should be noted that the preparation material of the fiber fabric layer 360 is not limited to the above preferred materials and exemplary materials.

[0082] Further, the fiber fabric layer 360 wraps the outer surfaces of the forefoot part 310, the midfoot arch part 320 and the heel part 330 of the insole 300 which are arranged sequentially along the length direction. During the wrapping process, the fiber fabric layer 360 is integrally formed with the transitional curved surface that is formed by the sequential bending of the forefoot part 310, the midfoot arch part 320 and the heel part 330 and matches the physiological contour of the human sole. This ensures the flatness of the surface of the wrapped fiber fabric layer 360 and the consistency with the original form of the transitional curved surface of the insole 300, and there is no wrinkle and protrusion, so that the original ergonomic support of the insole 300 is not damaged, and the complete and tight fit between the insole 300 and the sole is ensured. This can provide for the arch fit support in line with the human physiological structure, relieve the continuous tension of the arch muscle group and calf muscle group when wearing high‑heeled shoes, and slow down the occurrence of foot fatigue.

[0083] Exemplarily, the fiber fabric layer 360 may be made through an integrated hot‑press wrapping process to integrally wrap the upper surfaces, lower surfaces and circumferential side edges of the forefoot part 310, the midfoot arch part 320 and the heel part 330 along the transitional curved surface contour of the insole 300. After wrapping, stable fixation between the fiber fabric layer 360 and the insole 300 is achieved by bonding with a footwear polyurethane structural adhesive or through hot‑melt setting process.

[0084] Exemplarily, the fiber fabric layer 360 may also be made through a circumferential edge‑wrapping sewing process. In this process, the fiber fabric layer 360 first wraps the upper and lower surfaces of the insole 300, and then complete wrapping and fixation of the outer surfaces of the forefoot part 310, the midfoot arch part 320 and the heel part 330 are achieved through circumferential edge wrapping and sewing.

[0085] Furthermore, according to the assembly requirements of the first elastic member 211, the second elastic member 221 and the first fastener 410, the fiber fabric layer 360 may first fully warp the forefoot part 310, the midfoot arch part 320 and the heel part 330, and then leave assembly positions accurately matching the contours and installation positions of the first elastic member 211, the second elastic member 221 and the first fastener 410 respectively. Of course, the forefoot part 310, the midfoot arch part 320 and the heel part 330 may also be fully wrapped, and the first elastic member 211, the second elastic member 221 and the first fastener 410 are fixed on the lower surface of the fiber fabric layer 360 of the insole 300 while ensuring the integrity of the wrapping structure.

[0086] With this arrangement, the moisture absorption ability and breathability of the fiber fabric can improve the environment of the shoe cavity 100a where the sole is in contact with the insole 300, reduce sweat accumulation on the foot caused by continuous pressure bearing and dynamic walking during wearing high‑heeled shoes, and avoid sole slippage and skin maceration caused by sweat. In addition, it may also adjust the contact friction coefficient between the insole 300 and the sole skin. This avoids forward tilting and slippage of the foot in the shoe cavity 100a that would otherwise be caused by too low friction coefficient, eliminates hidden dangers of excessive compression in the forefoot area and heel fixation failure, ensures that all loads generated by the foot can be evenly and stably transmitted to the pressure dispersion component 210 and the cushioning component 220 through the insole 300, and guarantees stable effectiveness of the in-plane dispersion of concentrated compressive stress on the forefoot and the graded absorption of instantaneous impact load on the heel. In addition, this also avoids excessive friction between the sole skin and the insole 300 during dynamic walking that would otherwise be caused by too high friction coefficient, and reduces the risk of sole skin wear and blisters during long‑term wearing.

[0087] In addition, the fiber fabric layer 360 may provide complete wrapping protection for the base structure of the forefoot part 310, the midfoot arch part 320 and the heel part 330 of the insole 300, reduce wear and tensile damage to the base structure during repeated disassembly, cleaning and replacement of the insole 300, and extend the service life of the insole 300. Moreover, the fiber fabric layer 360 may block the penetration of pollutants such as foot dander into the base structure, and reduce odor and microbial growth caused by pollutant accumulation. In cooperation with the detachable design of the insole 300, it is convenient to clean and organize the insole 300, which further ensures the hygiene inside the shoe cavity 100a.

[0088] Preferably, the forefoot part 310, the midfoot arch part 320 and the heel part 330 of the insole 300 are integrally formed with a foamed polyurethane material, which ensures that the upper surface of the insole 300 can stably form a continuous transitional curved surface matching the physiological contour of the human sole. In addition, along the thickness direction T of the insole 300, the average foam cell size of the foamed polyurethane material on a side close to the midsole 122 of the shoe body 100 is a first cell size, and the average foam cell size on a side away from the midsole 122 of the shoe body 100 is a second cell size. The first cell size is smaller than the second cell size, so that the insole 300 has not only high support stability on the side facing the midsole 122, but also high fit and cushioning performance on the side facing the shoe cavity 100a.

[0089] Specifically, the smaller first cell size on the side close to the midsole 122 enables the foamed polyurethane material to have higher compression modulus and compression deformation resistance on the side close to the midsole 122. This can evenly and stably transmit loads in the all working conditions transmitted from the sole downward to the pressure dispersion component 210 and the cushioning component 220, and avoid load transmission loss caused by excessive deformation of the foamed polyurethane material. In addition, this can also provide a stable rigid support base for the arch part 112, and avoid continuous tension and stress imbalance of the arch muscle group caused by arch support collapse during wearing high‑heeled shoes.

[0090] The larger second cell size on the side away from the midsole 122 and facing the shoe cavity 100a enables the foamed polyurethane material to have better softness and contact cushioning performance on the side away from the midsole 122. In cooperation with the continuous transitional curved surface of the insole 300, the insole may completely and tightly fit with the physiological contour of the wearer’s sole, and the local concentrated loads on the sole under all working conditions of static standing and dynamic walking can be evenly dispersed. This further reduces the peak pressure in the pressure bearing area of the metatarsophalangeal joints and the pressure‑bearing area of the calcaneus, and relieves the continuous compression feeling of the forefoot and the instantaneous impact pain of the heel when wearing high‑heeled shoes. During dynamic walking, the insole can elastically deform synchronously with the dynamic deformation of the sole, which prevents relative slippage between the sole and the insole 300, stabilizes the relative position of the foot in the shoe cavity 100a, avoids the intensified trend of forward tilting, inversion and eversion of the foot when wearing high‑heeled shoes, and maintain the complete gait cycle of normal heel landing, arch support and forefoot push‑off. In addition, the larger second cell size can improve the moisture absorption ability and breathability of the foamed polyurethane material, reduce problems such as sole slippage and skin maceration caused by foot sweat accumulation during long‑term wearing of high‑heeled shoes, and improve the environment inside the shoe cavity 100a.

[0091] As a preferred implementation, referring to FIGS. 1 and 5, the arch part 112 of the shoe body 100 has a medial arch side 112a corresponding to the medial longitudinal arch of the human foot. A portion of the midfoot arch part 320 of the insole 300 close to the medial arch side 112a is bent toward the shoe cavity 100a to form a bending part 340, and the bending part 340 and the arch part 112 of the shoe body 100 enclose a cushioning space. The bending part 340 is configured to elastically deform toward the cushioning space when being squeezed by the medial longitudinal arch of the foot in the wearing state.

[0092] This arrangement can adapt to the differences in medial longitudinal arch height and arch shape of different wearers. For wearers with high arches, the bending part 340 may elastically deform toward the cushioning space to provide adaptive avoidance, which avoids local compression pain caused by excessive pressing at the medial arch side 112a. For wearers with flat feet or low arches, the bending part 340 may provide flexible support for the medial longitudinal arch of the foot through its own elastic restoring force, which avoids arch collapse and stress imbalance caused by insufficient support. In addition, under all working conditions of static standing and dynamic walking when wearing high‑heeled shoes, the bending part 340 may provide, through controllable elastic deformation, adaptive load cushioning and deformation adjustment with the dynamic deformation and load changes of the medial longitudinal arch, which effectively relieves the continuous pressure bearing of the medial longitudinal arch caused by the forward shift of the human body’s center of gravity when wearing high‑heeled shoes, avoids long‑term tension and spasm of the muscle group on the medial arch side 112a, and slows down the occurrence speed of foot fatigue.

[0093] It is worth mentioning that the adaptive elastic deformation characteristic of the bending part 340 may cooperate with the continuous transitional curved surface of the insole 300 matching the physiological contour of the human sole, to further improve the complete fit between the insole 300 and the medial longitudinal arch of different foot types, thereby ensuring that the wearer can more effectively maintain the complete gait cycle of normal heel landing, arch support and forefoot push‑off, and avoiding problems such as ligament strain around the ankle joint, joint instability and habitual sprain caused by abnormal gait.

[0094] As a preferred implementation, referring to FIGS. 1 and 5, the arch part 112 of the shoe body 100 also has a lateral arch side 112b corresponding to the lateral longitudinal arch of the human foot. A portion of the midfoot arch part 320 of the insole 300 close to the lateral arch side 112b is bent toward the shoe cavity 100a to form a folded edge part 350. The folded edge part 350 and the arch part 112 of the shoe body 100 enclose a deformation space. Specifically, the bending part 340 and the folded edge part 350 are respectively arranged on the medial and lateral sides corresponding to the medial longitudinal arch and lateral longitudinal arch of the human foot, with the longitudinal symmetry axis of the midfoot arch part 320 of the insole 300 as a reference. The folded edge part 350 is configured to elastically deform toward the deformation space when being squeezed by the lateral longitudinal arch of the foot in the wearing state.

[0095] This arrangement can adapt to the differences in lateral longitudinal arch shape and mechanical characteristics of different wearers. For wearers with high arches, the folded edge part 350 may elastically deform toward the deformation space to provide adaptive avoidance, which avoids local compression pain caused by excessive pressing at the lateral arch side 112b. For wearers with flat feet or low arches, the folded edge part 350 may provide flexible support for the lateral longitudinal arch of the foot through its own elastic restoring force, which avoids foot pressure imbalance caused by insufficient lateral support. In addition, under all working conditions of static standing and dynamic walking when wearing high‑heeled shoes, the folded edge part 350 may provide, through controllable elastic deformation, adaptive load cushioning and deformation avoidance with the dynamic deformation and load changes of the lateral longitudinal arch, which effectively relieves the continuous pressure bearing of the lateral longitudinal arch caused by the forward shift of the human body’s center of gravity when wearing high‑heeled shoes, avoids long‑term tension and spasm of the lateral foot muscle group, and slows down the occurrence speed of foot fatigue.

[0096] In addition, the folded edge part 350 and the bending part 340 of the insole 300 on the medial arch side 112a may provide medial and lateral adaptive flexible support systems, so that the insole 300 may adapt to, at the arch part 112, the shape and dynamic deformation requirements of both the medial longitudinal arch and lateral longitudinal arch of the foot, thereby maintaining the pressure balance of the medial and lateral sides of the foot, avoiding the intensified foot inversion and eversion caused by inappropriate medial and lateral arch support and pressure imbalance when wearing high‑heeled shoes, stabilizing the relative position of the wearer’s foot in the shoe cavity 100a, ensuring that the wearer can maintain the complete gait cycle of normal heel landing, arch support and forefoot push‑off, and avoiding problems such as ligament strain around the ankle joint, joint instability and habitual sprain caused by abnormal gait.

[0097] It is worth mentioning that the adaptive elastic deformation characteristic of the folded edge part 350 may also cooperate with the continuous transitional curved surface of the insole 300 matching the physiological contour of the human sole, to further improve the complete fit between the insole 300 and the lateral longitudinal arch of different foot types, thereby ensuring that all loads generated by the foot can be evenly and stably transmitted to the pressure dispersion component 210 of the forefoot part 111 and the cushioning component 220 of the heel part 113 through the insole 300, and guaranteeing stable effectiveness of the in-plane dispersion of concentrated compressive stress on the forefoot and the graded absorption of instantaneous impact load on the heel.

[0098] As a preferred implementation, referring to FIGS. 1, 2, 3, and 6, the shoe 1000 further includes a toe puff 500. The toe puff 500 is made of a closed‑cell foam material with excellent compression rebound performance, low compression set, skin‑friendly and wear‑resistant characteristics, moisture absorption ability and breathability, including but not limited to SBR latex foam, polyurethane high‑elasticity foam, and polyethylene cross‑linked foam. The toe puff 500 is arranged in a front‑end space of the shoe cavity 100a corresponding to the forefoot part 111, and the outline of the toe puff is adapted to the three‑dimensional contour of the toe cap of the shoe body 100. The toe puff 500 is fixedly connected with the upper 121 of the shoe body 100. The fixed connection here is preferably achieved by bonding with a conventional structural adhesive, hot‑melt composite or sewing which are conventional in the field of footwear products, to ensure that the toe puff 500 maintains a stable connection with the shoe body 100 under long‑term cyclic loads, avoid failure problems such as displacement, wrinkling and falling off caused by repeated squeezing and friction of the toes during wearing, and ensures long‑term stable effectiveness of the protection function of the toe puff 500.

[0099] In the embodiments, a surface of the toe puff 500 facing the shoe cavity 100a is formed with a wrapping cavity matching the physiological shape of the human toes, so as to circumferentially fit and wrap the toes in the wearing state. The toe puff 500 causes, through the elastic deformation of itself, axial top pressure loads and lateral compression loads borne by the toes to be evenly cushioned and dispersed in plane. This effectively reduces the load peak in the toe area, avoids rigid contact and hard friction between the front ends of the toes and the inner wall of the toe cap and between the side surfaces of the toes and the side walls of the toe cap, and reduces the occurrence of toe skin wear, blisters and soft tissue contusion. In addition, the wrapping cavity matching the physiological shape of the human toes provides a position limiting constraint on the toes, which maintains the normal physiological arrangement of the toes, and avoids abnormal postures such as toe adduction, flexion and overlapping caused by the narrowed structure of toe cap, thereby relieving problems such as interdigital nerve compression, toe numbness and phalangeal stress injury.

[0100] Preferably, there is a gap between a side of the toe puff 500 close to the arch part 112 and a side of the bending part 340 close to the forefoot part 111, that is, there is a gap, along the length direction L of the shoe body 100, between an end surface of the toe puff 500 facing the arch part 112 and an end surface of the bending part 340 facing the forefoot part 111. This provides sufficient avoidance space along the length direction L of the shoe body 100 for the assembly of insoles 300 of different specifications, and avoids structural interference between the bending part 340 and the toe puff 500 that would otherwise be caused by differences in position and range of the bending part 340 of insoles 300 of different specifications when the wearer replaces insoles 300 of different thicknesses, materials and support characteristics according to his / her own foot shape characteristics, arch state and wearing needs. Thus, it ensures that the insole 300 can be fully assembled in place, avoids irreversible plastic deformation of the bending part 340 caused by squeezing of the toe puff 500 during assembly, and maintains the original structural shape and elastic deformation performance of the bending part 340.

[0101] In addition, during the complete gait cycle from heel landing to forefoot push‑off, the foot would produce reciprocating micro‑displacement along the length direction L of the shoe body 100, which drives the insole 300 to produce synchronous micro‑movement. This gap can provide sufficient deformation and displacement space for the synchronous micro‑movement of the insole 300 and the bending part 340, thereby avoiding structural wear, elastic attenuation or even functional failure caused by continuous collision, squeezing and friction between the bending part 340 and the toe puff 500, eliminating foreign body sensation caused by structural collision, and ensuring the wearing flatness and comfort inside the shoe cavity 100a.

[0102] In the above shoe, the forefoot part, the midfoot arch part and the heel part of the insole are bent sequentially toward the side of the foot and are smoothly connected, in such a manner that the upper surface of the insole forms a transitional curved surface matching the contour of the bottom surface of the foot. As such, it enables the insole to provide full-area uniform fitting support to the bottom surface of the foot, which corrects the imbalance of foot pressure distribution caused by the forward shift of the center of gravity when wearing high-heeled shoes, provides for the foot stable support in line with ergonomics, and thus avoids excessive concentration of local foot load. On this basis, the shoe body is equipped with the comfort system including the pressure dispersion component and the cushioning component. The first elastic member of the pressure dispersion component is fixedly mounted on the forefoot part of the insole, and the concentrated load borne by the forefoot area is preliminarily dispersed and released by the first elastic member through the elastic deformation characteristics thereof, which effectively reduces the local pressure peak in the forefoot area and alleviates the discomfort and strain caused by long-term concentrated pressure on the forefoot area. The second elastic member of the cushioning component is fixedly mounted on the heel part of the insole, and the instantaneous impact load generated when the heel lands during walking is cushioned and absorbed by the second elastic member, which weakens the transmission of ground reaction force to the heel and lower limb joints, and reduces the impact pain in the heel area and the risk of lower limb strain caused by long-term wearing. In this way, while retaining the original wearing attributes of high-heeled shoes, the discomfort and long-term health risks during the wearing of high-heeled shoes are effectively alleviated.

[0103] In the description of the disclosure, some terms are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different names to refer to a same component. The specification and claims do not use differences in names to distinguish components, but use differences in functions of components to distinguish components. The term “comprise / include” used throughout the specification and claims is an open‑ended term, and it should be interpreted as “including but not limited to”. The term “substantially” means that those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

[0104] In the description of the disclosure, it should be understood that the terms indicating orientation or positional relationship such as “upper”, “lower”, “front”, “rear”, “left”, “right” and “inner” are based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the disclosure and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should be construed as a limitation to the disclosure.

[0105] In the disclosure, unless otherwise clearly specified and limited, the terms “install”, “connect”, “connected”, “fix” and other terms should be interpreted broadly. For example, the connection may be a fixed connection, a detachable connection, or an integrated connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium; it may also mean that two elements are communicated, or only in surface contact. For those of ordinary skill in the art, the specific meaning of the above terms in the disclosure can be understood according to specific situations.

[0106] In the description of the disclosure, references to the terms “an embodiment”, “some embodiments”, “an example”, “specific example”, or “some examples” mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to a same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this specification and the features of different embodiments or examples.

[0107] In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be interpreted as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include at least one such feature. In the description of the disclosure, “a plurality of / multiple” means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the disclosure rather than limiting them. Although the disclosure has been

[0109] described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the above embodiments, or equivalently replace some of the technical features; and these modifications or replacements do not drive the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the various embodiments of the disclosure.

Claims

1. A shoe, comprising:an insole, wherein the insole comprises a forefoot part, a midfoot arch part, and a heel part which are sequentially distributed along a length direction of the insole, and the forefoot part, the midfoot arch part, and the heel part are sequentially bent toward a side of a foot and are smoothly connected, in such a manner that an upper surface of the insole forms a transitional curved surface matching a contour of a bottom surface of the foot; anda comfort system, wherein the comfort system comprises a cushioning component and a pressure dispersion component, the pressure dispersion component comprises a first elastic member, the cushioning component comprises a second elastic member, the first elastic member is fixedly mounted on the forefoot part, and the second elastic member is fixedly mounted on the heel part.

2. The shoe as claimed in claim 1, wherein the pressure dispersion component further comprises a pressure bladder stacked with the first elastic member, the cushioning component further comprises a foam support stacked with the second elastic member, and the shoe further comprises:a shoe body having a midsole, wherein the midsole comprises a first forefoot part, a first arch part, and a first heel part which are sequentially distributed along a length direction of the midsole, the pressure bladder is fixedly mounted on the first forefoot part, and the foam support is fixedly mounted on the first heel part.

3. The shoe as claimed in claim 2, wherein along a stacking direction of the first elastic member and the pressure bladder, a projection of the first elastic member is within a coverage range of the pressure bladder.

4. The shoe as claimed in claim 3, wherein the first elastic member is provided on a side of the forefoot part close to the midfoot arch part, in such a manner that the first elastic member at least partially covers a force application area of metatarsophalangeal joints of the foot on the forefoot part.

5. The shoe as claimed in claim 2, wherein along a stacking direction of the second elastic member and the foam support, a projection of the second elastic member is within a coverage range of the foam support.

6. The shoe as claimed in claim 5, wherein along a circumferential direction of the heel part, at least one side edge of the second elastic member is adjacent to a corresponding side edge of the heel part.

7. The shoe as claimed in claim 2, wherein the insole further comprises:a fiber fabric layer wrapping outer sides of the forefoot part, the midfoot arch part, and the heel part.

8. The shoe as claimed in claim 7, wherein the shoe body is provided with a shoe cavity, an arch part of the shoe body has a medial arch side, a portion of the midfoot arch part close to the medial arch side is bent toward the shoe cavity to form a bending part, the bending part and the shoe body enclose a cushioning space, and the bending part is configured to elastically deform toward the cushioning space when being squeezed by medial longitudinal arch of the foot in a wearing state.

9. The shoe as claimed in claim 8, wherein the arch part of the shoe body further has a lateral arch side, a portion of the midfoot arch part close to the lateral arch side is bent toward the shoe cavity to form a folded edge part, the folded edge part and the shoe body enclose a deformation space, and the folded edge part is configured to elastically deform toward the deformation space when being squeezed by lateral longitudinal arch of the foot in the wearing state.

10. The shoe as claimed in claim 8, wherein the forefoot part, the midfoot arch part, and the heel part are integrally formed with a foamed polyurethane material, an average foam cell size of the foamed polyurethane material on a side close to the midsole is a first cell size, an average foam cell size of the foamed polyurethane material on a side away from the midsole is a second cell size, and the first cell size is smaller than the second cell size.

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