Length-adjustable shoe

Abstract

The utility model discloses a pair of length-adjustable shoes, which comprises soles, a pair of shoes, a pair of shoes, a pair of shoes and a pair of shoes, a first nesting part is arranged at the rear end of the half sole body, and a second nesting part is arranged at the front end of the heel body; the first nesting part and the second nesting part are mutually nested and connected in the front-back direction, so that the half sole body and the heel body relatively slide in a preset range in the front-back direction; the vamp is compounded on the sole and comprises a first face part and a second face part; the setting range of the first face part continuously extends from the half sole body to the heel body, and the first face part is directly connected to the half sole body and the heel body; the second face part is connected to the parts, except the parts connected with the first face part, of the half sole body and the heel body; the first face part is woven into a net surface by obliquely interweaving a plurality of ropes in the vertical direction, part of the ropes are connected with the second face part and the half sole body, and the rest ropes are connected with the second face part and the heel body. The length of the shoe can be adjusted, so that the adaptation degree of the shoe and the foot of a user is improved.

Description

Technical Field

[0001] This utility model relates to the field of footwear technology, specifically to a shoe with adjustable length. Background Technology

[0002] In the footwear industry, the standardization of shoe sizes has always been a problem for both consumers and manufacturers. Consumers' foot sizes are not always consistent; for example, during exercise, feet may swell slightly due to increased blood circulation and foot swelling. Furthermore, different brands and styles of shoes may have subtle differences in sizing standards, making it difficult for consumers to accurately choose the most comfortable size when purchasing.

[0003] For children and adolescents in their growth period, foot size changes more frequently and significantly. Due to rapid growth and development, they may need to replace their shoes every so often, which undoubtedly increases the financial burden on families and also causes unnecessary waste.

[0004] In the current technology, shoes, whether athletic, casual, or other types, typically have a fixed length. To address this issue, some experimental solutions have emerged, such as using elastic materials for the upper to adapt to changes in foot shape to some extent. However, the adjustment effect of these solutions is not significant, and it is difficult to truly adjust the length of the sole. Utility Model Content

[0005] The purpose of this invention is to overcome the aforementioned defects or problems in the prior art and to provide a shoe with an adjustable length, the length of which can be adjusted to improve the fit to the user's foot.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Technical Solution 1: An adjustable-length shoe, comprising: a sole, including a forefoot and a heel; a first nesting portion is provided at the rear end of the forefoot, and a second nesting portion is provided at the front end of the heel; the first nesting portion and the second nesting portion are nested and connected to each other in a front-back direction, so that the forefoot and heel slide relative to each other within a preset range in a front-back direction; and an upper, which is composited with the sole and includes a first facet and a second facet; the first facet extends continuously from the forefoot to the heel and is directly connected to the forefoot and heel; the second facet is connected to the forefoot and heel except for the portion connected to the first facet; the first facet is woven from multiple ropes interwoven obliquely in a vertical direction to form a mesh, wherein some ropes connect the second facet and the forefoot, and the remaining ropes connect the second facet and the heel.

[0008] Technical Solution 2 based on Technical Solution 1: The shoe upper further includes a connecting part, which is located between the first facet and the second facet, and is configured as an elongated member that adapts to the contour of the second facet; the connecting part is continuously connected to the edge of the second facet and is point-connected to the end of the rope in the first facet.

[0009] Technical Solution 3 based on Technical Solution 2: The connecting part includes a first connecting segment and a second connecting segment that are connected to each other; the lower end of the first connecting segment is connected to the forefoot body and extends upward; the lower end of the second connecting segment is connected to the heel body and extends upward; the upper ends of the first connecting segment and the second connecting segment are connected together.

[0010] Technical solution four based on technical solution three: The first connecting segment extends from bottom to top and is bent in a forward-facing concave shape, with its upper end and lower end flush in the front-back direction.

[0011] Technical Solution 5 based on Technical Solution 2: The connecting part is made of thermoplastic polyurethane elastomer, nylon or polyolefin elastomer.

[0012] Technical Solution Six based on Technical Solution One: The first nested part is provided with a nested groove with an opening facing backward, and the second nested part is provided with a nested head that protrudes forward, and the nested head is inserted into the nested groove to form a nested connection.

[0013] Technical solution seven based on technical solution six: The upper and lower walls of the nesting groove at the middle position in the left-right direction are provided with a first opening and a second opening; the nesting head is provided with a first ridge corresponding to the first opening and a second ridge corresponding to the second opening; the upper surface of the first ridge is flush with the upper surface of the corresponding position of the shoe sole, and the lower surface of the second ridge is flush with the lower surface of the corresponding position of the shoe sole.

[0014] Technical solution eight based on technical solution seven: The left and right sides of the nested groove are recessed and have mating grooves that extend in the front-back direction and open at the rear end; the nested head is provided with a nesting platform that mates with the nested groove, and the left and right ends of the nesting platform are provided with third convex ridges that extend in the front-back direction corresponding to the mating groove; the first convex ridge and the second convex ridge are provided on the upper and lower surfaces of the nesting platform.

[0015] Technical solution nine, based on technical solution eight, further includes a position adjustment component; the position adjustment component includes a screw and a nut; the screw is fixedly installed on one of the forefoot or heel body, and its length direction is consistent with the front-back direction of the sole; the nut is front-back limited and rotatably installed on the other of the forefoot or heel body, and is screwed into the screw; the nut protrudes from the surface of the sole and is adapted to adjust its position on the screw by rotation.

[0016] Technical solution ten based on technical solution nine: The screw is fixedly installed on the forefoot body and located in the nested groove; the nut is installed on the heel body and protrudes from the surface of the heel body; the heel body is provided with a receiving channel for accommodating the screw.

[0017] As can be seen from the above description of this utility model, compared with the prior art, this utility model has the following beneficial effects:

[0018] Technical Solution 1 provides a length-adjustable shoe. Its core lies in achieving relative sliding in the forefoot and heel directions through a nested connection between the forefoot and heel sections of the sole. Simultaneously, specific structural designs of the first and second sections of the upper adapt to changes in sole length. Specifically, the first nested section at the rear of the forefoot and the second nested section at the front of the heel are nested together in the forefoot direction, allowing the sole length to be adjusted within a preset range. The friction and geometric constraints of the nested structure ensure stability and controllability during sliding. The upper employs a combination of the first and second sections. The first section, with its mesh structure formed by obliquely interwoven ropes, possesses strong elasticity and extensibility, adaptively stretching or contracting during sole length adjustment. This prevents the upper from becoming excessively tight or loose due to length changes, ensuring a snug fit between the shoe and the user's foot. Furthermore, some ropes connect the second section to the forefoot, while the remaining ropes connect the second section to the heel. This segmented connection design further disperses stress concentration during length adjustment, enhancing the overall stability and durability of the upper. This technical solution significantly improves the fit between shoes and users' feet through the synergistic effect of adjustable sole length and adaptive upper extension. It is especially suitable for scenarios where foot size changes due to exercise, growth, or other reasons, and solves the discomfort problem caused by fixed shoe length in existing technologies.

[0019] Technical Solution Two, building upon Technical Solution One, further optimizes the upper structure. By adding a connecting section between the first and second facets, a long strip-shaped component is formed that adapts to the contour of the second facet. This component is continuously connected to the edge of the second facet and point-to-point connected to the ends of the ropes on the first facet. This connecting section acts as a transition structure, evenly transferring the tensile or compressive stress generated during length adjustment from the mesh structure of the first facet to the second facet, preventing rope breakage or upper deformation caused by stress concentration. The continuous connection between the connecting section and the second facet enhances the overall stability of the upper structure, while the point-to-point connection to the ropes on the first facet retains the flexibility and extensibility of the mesh structure. This allows the upper to maintain its shape while providing sufficient elastic support as it adapts to changes in sole length. Therefore, this technical solution, through the rational design of the connecting section, further improves the structural stability and comfort of the upper during length adjustment, ensuring a better fit and support for the user.

[0020] Technical Solution 3, building upon Technical Solution 2, refines the specific structure of the connecting part, dividing it into a first connecting segment and a second connecting segment that are interconnected. The lower end of the first connecting segment connects to the forefoot and extends upwards, while the lower end of the second connecting segment connects to the heel and extends upwards, with the upper ends of the two segments joining together. This connecting part decomposes the tensile force on the upper during length adjustment into two independent components acting on the forefoot and heel, which are then transmitted to different areas of the sole through the first and second connecting segments, avoiding stress concentration that might occur with a single connecting structure. Simultaneously, this design allows the connecting part to better adapt to shape changes caused by the forefoot and heel sliding, enhancing the synergy between the upper and sole, thus maintaining the overall coordination and stability of the upper during shoe length adjustment. Therefore, this technical solution, through the segmented design of the connecting part, further optimizes the mechanical properties of the upper during dynamic adjustment, improving the shoe's durability and comfort.

[0021] Technical Solution Four, building upon Technical Solution Three, defines the shape of the first connecting segment as a curved shape extending upwards and concave towards the front, with its upper and lower ends flush in the front-to-back direction. This curved shape of the first connecting segment better conforms to the bending shape of the forefoot during walking or running, thus reducing pressure on the forefoot when adjusting the length for writing, improving wearing comfort. Simultaneously, the flush design of the upper and lower ends ensures balanced force distribution during length adjustment, avoiding localized stress concentration caused by shape asymmetry, further enhancing the stability of the upper structure. Therefore, this technical solution, by optimizing the geometry of the first connecting segment, makes the upper structure more conform to the characteristics of the human foot, significantly improving the shoe's fit and wearing comfort.

[0022] Technical Solution Five, building upon Technical Solution Two, specifies that the connecting part is made of thermoplastic polyurethane elastomer, nylon, or polyolefin elastomer. These materials all possess excellent elasticity and abrasion resistance, capable of undergoing significant deformation under tension or compression without permanent damage, while also exhibiting strong recovery capabilities to ensure stable mechanical properties of the connecting part during frequent adjustments to the sole length. Furthermore, these materials also possess good weather resistance and chemical corrosion resistance, adapting to the needs of various environments and extending the shoe's lifespan. Therefore, this technical solution, by selecting suitable elastic materials, further enhances the functionality and durability of the connecting part, enabling the upper to continuously provide stable support and comfort during length adjustments.

[0023] Technical Solution Six, building upon Technical Solution One, refines the specific connection method between the first and second nesting parts. Specifically, the first nesting part has a rearward-opening nesting groove, and the second nesting part has a forward-protruding nesting head. The nesting head inserts into the nesting groove to form a nested connection. By matching the geometry of the nesting groove and the nesting head, high stability and guidance are ensured in the relative sliding of the forefoot and heel in the front-back direction, preventing potential offset or detachment during sliding. Simultaneously, the rearward-opening design of the nesting groove provides a certain geometric constraint to the nesting head after insertion, effectively preventing accidental separation of the sole due to external forces during use. Therefore, this technical solution, through the optimized design of the nesting structure, further enhances the reliability and safety of the sole length adjustment mechanism, providing users with a more stable user experience.

[0024] Technical Solution Seven, building upon Technical Solution Six, further optimizes the structure of the nesting groove and the nesting head. Specifically, a first opening and a second opening are provided through the upper and lower walls of the nesting groove at the midpoint of its left-right direction. Correspondingly, the nesting head has a first ridge and a second ridge, with the upper surface of the first ridge flush with the upper surface of the sole, and the lower surface of the second ridge flush with the lower surface of the sole. The openings and ridges increase the contact area and constraint points between the nesting groove and the nesting head, thereby enhancing the stability and shear resistance of the connection structure and preventing localized deformation or damage to the sole due to uneven force during sliding. Simultaneously, the flush design of the first and second ridges with the sole surface ensures a smooth upper and lower surface of the sole, reducing the feeling of foreign objects that users may experience while wearing the shoe and improving comfort. Therefore, this technical solution, through structural optimization, further improves the reliability and wearing comfort of the nested connection of the sole.

[0025] Technical Solution 8, building upon Technical Solution 7, further refines the structure of the nesting groove and nesting head. Specifically, the left and right sides of the nesting groove are recessed with mating grooves extending in the front-to-back direction and opening at the rear. The nesting head has a nesting platform, with corresponding third ridges extending in the front-to-back direction at both ends of the platform. The first and second ridges are located on the upper and lower surfaces of the nesting platform, respectively. The mating grooves and third ridges enhance the guidance and stability of the forefoot and heel during sliding, preventing lateral deviation. Simultaneously, the open rear end of the mating groove facilitates the assembly and disassembly of the nesting head, while the first and second ridges on the nesting platform provide additional support while ensuring surface flatness, improving the overall compressive and shear resistance of the sole structure. Therefore, this technical solution, through the refined design of the nesting structure, further optimizes the stability and ease of operation of sole length adjustment, providing users with a more reliable user experience.

[0026] Technical Solution Nine, building upon Technical Solution Eight, adds a position adjustment component, including a screw and a nut. The screw is fixedly installed on either the forefoot or the heel, while the nut is rotatably installed on the other, with its position adjusted by rotation. The helical motion of the screw and nut converts rotational force into linear displacement, thereby achieving precise adjustment and positioning of the relative position between the forefoot and heel. The nut's exposed surface on the sole, allowing for easy rotation, facilitates manual operation. This position adjustment component enables users to precisely adjust the sole length according to their needs, overcoming the limitations of fixed shoe sizes in existing technologies. Therefore, this technical solution, by introducing a precise mechanical adjustment mechanism, significantly improves the accuracy and ease of shoe length adjustment, providing users with a personalized fit experience.

[0027] Technical Solution Ten, building upon Technical Solution Nine, specifically defines a screw fixedly installed in a nested groove in the forefoot, with a nut installed in the heel counter and protruding from its surface. The heel counter has a receiving channel for accommodating the screw. Placing the screw in the nested groove and connecting it to the heel counter via the receiving channel fully utilizes the internal space of the sole while avoiding the impact of the adjustment components on the external shape of the sole and wearing comfort. The design of the nut protruding from the heel counter facilitates operation from the rear of the shoe, and the receiving channel in the heel counter allows for screw accommodation when the heel counter slides relative to the forefoot. Therefore, this technical solution, through optimization of the specific layout of the position adjustment components, further enhances the practicality and comfort of shoe length adjustment, providing users with a more convenient and efficient adjustment experience. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural schematic diagram of an adjustable-length shoe according to an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 Illustration of the shoe sole Figure 1 ;

[0031] Figure 3 for Figure 1 Illustration of the shoe sole Figure 2 ;

[0032] Figure 4 for Figure 3 Schematic diagram of the structure of the mid-forefoot;

[0033] Figure 5 for Figure 3 Schematic diagram of the structure of the middle and rear heel. Figure 1 ;

[0034] Figure 6 for Figure 3 Schematic diagram of the structure of the middle and rear heel. Figure 2 ;

[0035] Figure 7 for Figure 3 A schematic diagram of the internal structure of the midsole.

[0036] Explanation of key figure labels:

[0037] Shoe sole 10; forefoot body 11; first nesting part 111; nesting groove 112; first opening 113; second opening 114; mating groove 115; heel body 12; second nesting part 121; nesting head 122; first ridge 123; second ridge 124; nesting platform 125; third ridge 126; receiving channel 127;

[0038] Upper 20; First facet 21; Rope 211; Second facet 22; Connecting part 23; First connecting segment 231; Second connecting segment 232;

[0039] Position adjustment assembly 30; screw 31; nut 32. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are preferred embodiments of the present utility model and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0041] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and drawings of this utility model is for distinguishing different objects and not for describing a specific order.

[0042] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this utility model, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing this utility model and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of this utility model.

[0043] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this utility model shall be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection through other devices or components.

[0044] In the claims, description and accompanying drawings of this utility model, the terms "comprising", "having", and variations thereof are used to mean "including but not limited to".

[0045] Example

[0046] This utility model relates to a shoe with adjustable length, see reference. Figure 1 The shoe includes a sole 10, an upper 20, and a position adjustment assembly 30, the position adjustment assembly 30 being in... Figure 7 As shown in the image.

[0047] Reference Figure 1 , Figure 2 and Figure 3In this embodiment, the adjustable-length shoe includes a sole 10 comprising a forefoot body 11 and a heel body 12. The forefoot body 11 has a first nesting portion 111 at its rear end, and the heel body 12 has a second nesting portion 121 at its front end. The first nesting portion 111 and the second nesting portion 121 are nested together in the front-back direction, allowing the forefoot body 11 and the heel body 12 to slide relative to each other within a preset range in the front-back direction. The upper 20 is attached to the sole 10 and includes a first facet 21 and a second facet 22. The first facet 21 is configured as follows: The range extends continuously from the forefoot body 11 to the heel body 12 and is directly connected to the forefoot body 11 and the heel body 12; the second face 22 is connected to the forefoot body 11 and the heel body 12 except for the portion connected to the first face 21; and the first face 21 is woven from multiple ropes 211 interwoven obliquely in the vertical direction to form a mesh, wherein some ropes 211 connect the second face 22 and the forefoot body 11, and the remaining ropes 211 connect the second face 22 and the heel body 12.

[0048] The following is a first introduction to the sole 10.

[0049] Reference Figure 4 , Figure 5 and Figure 6 The sole 10 includes an independent forefoot body 11 and a heel body 12. A first nesting portion 111 is formed at the rear end of the forefoot body 11, and a second nesting portion 121 is formed at the front end of the heel body 12. The front-back direction is based on the conventional direction of the shoe, for example, the toes point forward and the heel points backward. The first nesting portion 111 and the second nesting portion 121 are nested and connected to each other in the front-back direction. This nesting connection means that one of the first nesting portion 111 and the second nesting portion 121 extends into the other in the front-back direction and has a contact surface to ensure the connection between the forefoot body 11 and the heel body 12. At the same time, the two can slide relative to each other in the front-back direction within a preset limited range, thereby adjusting the length of the sole 10 in the front-back direction.

[0050] The first nesting part 111 has a rearward-opening nesting groove 112, and the second nesting part 121 has a forward-protruding nesting head 122. The nesting head 122 can be inserted into the nesting groove 112 to form a nested connection between the forefoot body 11 and the heel body 12. The nesting groove 112 is a groove-shaped structure with its opening located on the rear sidewall of the forefoot body 11 and recessed towards the front of the forefoot body 11 to form a space within the groove, which is surrounded by groove walls on its periphery. The nesting head 122 is a structure whose shape is adapted to the nesting groove 112. It can extend into the nesting groove 112, and the periphery of the nesting head 122 contacts the groove wall of the nesting groove 112 to ensure sufficient friction between them. By matching the geometry of the nesting groove 112 and the nesting head 122, the relative sliding of the forefoot body 11 and the heel body 12 in the front-back direction is ensured to have high stability and guidance, avoiding possible deviation or disengagement during sliding. Meanwhile, the rearward opening of the nesting slot 112 provides a certain geometric constraint to the nesting head 122 after insertion, effectively preventing the sole 10 from accidentally separating due to external forces during use. Therefore, this technical solution, through the optimized design of the nesting structure, further enhances the reliability and safety of the sole 10 length adjustment mechanism, providing users with a more stable user experience.

[0051] Furthermore, in this embodiment, the upper and lower walls of the nesting groove 112 at the middle position in the left-right direction are provided with a first opening 113 and a second opening 114; the nesting head 122 is provided with a first ridge 123 corresponding to the first opening 113 and a second ridge 124 corresponding to the second opening 114; the upper surface of the first ridge 123 is flush with the upper surface of the corresponding position of the sole 10, and the lower surface of the second ridge 124 is flush with the lower surface of the corresponding position of the sole 10. The left and right side walls of the nesting groove 112 are recessed with mating grooves 115 extending in the front-back direction and opening at the rear end; the nesting head 122 is provided with a nesting platform 125 that mates with the nesting groove 112, and the left and right ends of the nesting platform 125 are provided with third ridges 126 extending in the front-back direction corresponding to the mating groove 115; the first ridge 123 and the second ridge 124 are provided on the upper and lower surfaces of the nesting platform 125.

[0052] Specifically, first refer to Figure 4A first opening 113, connecting to the rear end sidewall of the forefoot 11, is provided through the upper wall of the nesting groove 112. A second opening 114, connecting to the rear end sidewall of the forefoot 11, is provided through the lower wall of the nesting groove 112. The first opening 113 and the second opening 114 are approximately the same length in the front-back direction and approximately the same width in the left-right direction. Furthermore, the thickness of the upper wall of the nesting groove 112 is greater than the thickness of its lower wall to improve wearing comfort. Matching grooves 115 are also provided on the left and right sidewalls of the nesting groove 112. The matching grooves 115 are recessed to the side relative to the left and right walls of the nesting groove 112, extend in the front-back direction, and connect to the rear end sidewall of the forefoot 11. The width of the matching grooves 115 in the vertical direction is less than the width of the left and right walls of the nesting groove 112 in the vertical direction, thus creating a concave structure. The mating groove 115 and the nested groove 112 fit together as a whole, forming a cross-shaped groove structure in the cross section.

[0053] Corresponding to the structure of the nesting groove 112, the nesting head 122 is provided with a nesting platform 125, and a first ridge 123 is provided on the upper surface of the nesting platform 125, a second ridge 124 is provided on the lower surface, and a third ridge 126 is provided on the left and right surfaces. The thickness of the nesting platform 125 in the vertical direction is approximately matched to the width of the nesting groove 112 in the vertical direction, so that it can be nested into the nesting groove 112. The first ridge 123 is a structure with a certain width in the left and right direction that protrudes from the upper surface of the nesting platform 125. Its width in the left and right direction matches the width of the first opening 113, and its thickness variation in the front and back direction also matches the thickness variation of the upper groove wall of the nesting groove 112. This ensures that the variation of the upper surface of the sole 10 in the front and back directions remains consistent across the forefoot 11 and heel 12, improving wearing comfort. The second ridge 124 is a structure with a certain width in the left-right direction that protrudes from the lower surface of the nesting platform 125. Its width in the left-right direction matches the width of the second opening 114, and its thickness variation in the front-back direction also matches the thickness variation of the lower wall of the nesting groove 112, so that the variation of the lower surface of the sole 10 in the front-back direction can be consistent on the forefoot body 11 and the heel body 12. The third ridge 126 is a structure with a certain width in the vertical direction that protrudes from the left and right surfaces of the nesting platform 125. Its width in the vertical direction matches the width of the mating groove 115, so that while the nesting head 122 is nested into the nesting groove 112, it can also form a nesting fit with the mating groove 115.

[0054] The open design and raised ridges increase the contact area and constraint points between the nesting groove 112 and the nesting head 122, thereby enhancing the stability and shear resistance of the connection structure and preventing local deformation or damage to the sole 10 due to uneven force during sliding. Simultaneously, the flush design of the first raised ridge 123 and the second raised ridge 124 with the surface of the sole 10 ensures a smooth upper and lower surface, reducing the feeling of foreign objects that users may experience and improving wearing comfort. Therefore, this technical solution, through structural optimization, further improves the reliability and wearing comfort of the nested connection of the sole 10. The combination of the groove 115 and the third raised ridge 126 further enhances the guidance and stability of the forefoot body 11 and the heel body 12 during sliding, preventing lateral deviation. Meanwhile, the open design at the rear end of the groove 115 facilitates the assembly and disassembly of the nesting head 122, while the first ridge 123 and the second ridge 124 on the nesting platform 125 provide additional support while ensuring a smooth surface, thus enhancing the overall compressive and shear resistance of the sole 10. Therefore, this technical solution, through the refined design of the nesting structure, further optimizes the stability and ease of operation of the sole 10's length adjustment, providing users with a more reliable user experience.

[0055] Next, the position adjustment component 30 will be introduced.

[0056] The position adjustment assembly 30 includes a screw 31 and a nut 32. The screw 31 is fixedly installed on one of the forefoot body 11 or the heel body 12, and its length direction is consistent with the front-back direction of the sole 10. The nut 32 is rotatably installed on the other of the forefoot body 11 or the heel body 12 and is screwed into the screw 31. The nut 32 protrudes from the surface of the sole 10 and is adapted to be adjusted by rotating it to adjust its position on the screw 31. The screw 31 is fixedly installed on the forefoot body 11 and is located in the nesting groove 112. The nut 32 is installed on the heel body 12 and protrudes from the surface of the heel body 12. The heel body 12 is provided with a receiving channel 127 for accommodating the screw 31.

[0057] Specifically, in order to precisely adjust the length of the sole 10 and to keep the positions of the forefoot 11 and heel 12 fixed after changes in their positions, the aforementioned position adjustment component 30 is provided. (Refer to...) Figure 4 , Figure 5 and Figure 7A screw 31 is fixedly mounted on the forefoot body 11. The outer circumferential surface of the screw 31 is threaded, and the length direction of the screw 31 is consistent with the front-rear direction of the sole 10. Simultaneously, a receiving channel 127 is provided on the heel body 12 corresponding to the position of the screw 31. The receiving channel 127 also extends in the front-rear direction, allowing it to accommodate the rear end portion of the screw 31 after the forefoot body 11 and heel body 12 are nested together. A nut 32 is provided at the middle section of the receiving channel 127. The nut 32 is screwed to the screw 31, and the nut 32 is axially limited by the heel body 12. The specific limiting method is described in [reference needed]. Figure 6 A groove can be provided on the heel body 12, and the nut 32 can be placed in the groove. The inner side wall of the groove in the front and rear directions can be used to restrict the axial movement of the nut 32.

[0058] The position adjustment component 30 utilizes the helical motion of the screw 31 and nut 32 to convert rotational force into linear displacement, thereby achieving precise adjustment and positioning of the relative position between the forefoot 11 and the heel 12. The nut 32 is exposed on the surface of the sole 10 and designed for rotation, facilitating manual operation by the user. Through the position adjustment component 30, users can precisely adjust the length of the sole 10 according to actual needs, overcoming the shortcomings of fixed shoe sizes in existing technologies. Therefore, this technical solution, by introducing a precise mechanical adjustment mechanism, significantly improves the accuracy and ease of operation of shoe length adjustment, providing users with a personalized fitting experience.

[0059] Furthermore, placing the screw 31 within the nesting groove 112 and connecting it to the heel body 12 via the receiving channel 127 fully utilizes the internal space of the sole 10 while avoiding the impact of the adjustment component on the external shape and wearing comfort of the sole 10. The design of the nut 32 protruding from the surface of the heel body 12 facilitates operation from the rear of the shoe, while the receiving channel 127 in the heel body 12 accommodates the screw 31 when the heel body 12 slides relative to the forefoot body 11. Therefore, this technical solution, through optimization of the specific layout of the position adjustment component 30, further enhances the practicality and comfort of shoe length adjustment, providing users with a more convenient and efficient adjustment experience.

[0060] The following is a description of the shoe upper 20.

[0061] Specifically, the shoe length adjustment is related not only to the sole 10 but also to the upper 20, because when the length of the sole 10 changes, the upper 20, which is composite with the sole 10, will also deform in the area of ​​length change. (Refer to...) Figure 1In this embodiment, the shoe upper 20 is divided into a first facet 21, a second facet 22, and a connecting portion 23. The first facet 21 is woven from multiple ropes 211 to form a mesh structure. The second facet 22 can be made of conventional fabric, leather, or other materials, and is not limited here. Furthermore, the material of the ropes 211 in the first facet 21 is not limited here; they can be yarns made of chemical fibers, natural fibers, etc., or synthetic rope-like polymer material components can be used directly.

[0062] In this embodiment, the key feature of the first face 21 lies in its woven structure. (Refer to...) Figure 1 The first face 21 has two sets of ropes 211, each set having multiple ropes 211. The ropes 211 in the first set extend obliquely from top to bottom and from front to back, while the ropes 211 in the second set extend obliquely from top to bottom and from back to front. The density of the two sets of ropes 211 is appropriate, allowing them to interweave and form a net. The lower ends of some ropes 211 are connected to the forefoot body 11, and the lower ends of the remaining ropes 211 are connected to the heel body 12.

[0063] Furthermore, the upper 20 also includes a connecting portion 23, which is located between the first facet 21 and the second facet 22 and is configured as an elongated member adapted to the contour of the second facet 22. The connecting portion 23 is continuously connected to the edge of the second facet 22, for example by stitching or bonding, and is point-connected to the end of the rope 211 in the first facet 21, typically by pressing or bonding. The connecting portion 23 can be made of thermoplastic polyurethane elastomer, nylon, or polyolefin elastomer, thereby providing good connection stability. The shape of the connecting portion 23 and the connection method between the connecting portion 23 and the first facet 21 and the second facet 22 uniformly transfer the tensile or compressive stress generated during length adjustment of the upper 20 from the mesh structure of the first facet 21 to the second facet 22, avoiding stress concentration that could lead to rope 211 breakage or upper 20 deformation. The continuous connection between the connecting part 23 and the second face 22 enhances the overall structural stability of the upper 20, while the point-like connection with the rope 211 of the first face 21 preserves the flexibility and extensibility of the mesh structure. This allows the upper 20 to maintain its shape and provide sufficient elastic support when adapting to changes in the length of the sole 10. Therefore, this technical solution, through the rational design of the connecting part 23, further improves the structural stability and comfort of the upper 20 during length adjustment, ensuring that users experience better fit and a more comfortable fit during use.

[0064] In this embodiment, the connecting portion 23 includes a first connecting segment 231 and a second connecting segment 232. The connecting portion 23 includes the first connecting segment 231 and the second connecting segment 232 connected to each other; the lower end of the first connecting segment 231 is connected to the forefoot body 11 and extends upwards; the lower end of the second connecting segment 232 is connected to the heel body 12 and extends upwards; the upper ends of the first connecting segment 231 and the second connecting segment 232 are connected together. The connecting portion 23 decomposes the tensile force on the upper 20 during length adjustment into two independent components acting on the forefoot body 11 and the heel body 12, which are transmitted to different areas of the sole 10 through the first connecting segment 231 and the second connecting segment 232, respectively, avoiding stress concentration that may occur with a single connecting structure. Simultaneously, this design allows the connecting portion 23 to better adapt to the shape changes caused by the forward and backward sliding of the sole 10, enhancing the synergy between the upper 20 and the sole 10, thereby maintaining the overall coordination and stability of the upper 20 during shoe length adjustment. Therefore, this technical solution further optimizes the mechanical properties of the upper 20 during dynamic adjustment by using the segmented design of the connecting part 23, thereby improving the durability and comfort of the shoe.

[0065] Furthermore, the first connecting segment 231 extends upwards and is concave forward, with its upper end flush with its lower end in the front-to-back direction. The curved shape of the first connecting segment 231 better conforms to the bending shape of the forefoot portion of the upper 20 during walking or running, thereby reducing pressure on the forefoot when adjusting the writing length and improving wearing comfort. Simultaneously, the flush design of the upper and lower ends ensures the balance of force on the connecting portion 23 during length adjustment, avoiding localized stress concentration caused by shape asymmetry, further enhancing the stability of the upper 20 structure. Therefore, this technical solution, by optimizing the geometry of the first connecting segment 231, makes the upper 20 structure more conform to the characteristics of the human foot, significantly improving the shoe's fit and wearing comfort.

[0066] This embodiment relates to an adjustable-length shoe, the core of which lies in the nested connection between the forefoot 11 and heel 12 of the sole 10 to achieve relative sliding in the front-to-back direction. Simultaneously, the specific structural design of the first facet 21 and the second facet 22 of the upper 20 adapts to changes in the length of the sole 10. Specifically, the first nested portion 111 at the rear end of the forefoot 11 and the second nested portion 121 at the front end of the heel 12 are nested together in the front-to-back direction, allowing the sole 10 to be adjusted in length within a preset range. The friction and geometric constraints of the nested structure ensure the stability and controllability of the sliding process. The upper 20 adopts a combined design of the first facet 21 and the second facet 22. The first facet 21, with its mesh structure formed by the inclined interweaving of ropes 211, has strong elasticity and extensibility, enabling it to adaptively stretch or contract when the length of the sole 10 is adjusted. This avoids excessive tightness or looseness of the upper 20 due to length changes, ensuring a good fit between the shoe and the user's foot. Furthermore, some ropes 211 connect the second upper 22 to the forefoot 11, while the remaining ropes 211 connect the second upper 22 to the heel 12. This segmented connection design further disperses stress concentration in the upper 20 during length adjustment, enhancing the overall stability and durability of the upper 20. This technical solution, through the synergistic effect of the adjustable sole 10 and the adaptive extension of the upper 20, significantly improves the fit between the shoe and the user's foot, making it particularly suitable for scenarios where foot size changes due to exercise, growth, or other reasons. It solves the discomfort problem caused by fixed shoe length in existing technologies.

[0067] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this utility model, but does not constitute a limitation on the scope of protection of this utility model. Modifications, equivalent substitutions, or other improvements to the embodiments of this utility model or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this utility model or the foregoing embodiments, should all be included within the scope of protection of this utility model.

Claims

1. An adjustable length shoe, characterized by, The application relates to a shoe, which comprises: a sole (10) comprising a forefoot body (11) and a heel body (12); a first nesting part (111) is arranged at the rear end of the forefoot body (11), and a second nesting part (121) is arranged at the front end of the heel body (12); the first nesting part (111) and the second nesting part (121) are connected to each other in a nesting mode along the front-rear direction, so that the forefoot body (11) and the heel body (12) can slide relative to each other within a preset range along the front-rear direction; and a vamp (20) which is combined with the sole (10) and comprises a first face part (21) and a second face part (22); the arrangement range of the first face part (21) continuously extends from the forefoot body (11) to the heel body (12) and is directly connected to the forefoot body (11) and the heel body (12); the second face part (22) is connected to the forefoot body (11) and the heel body (12) except the connecting part (23) of the first face part (21); the first face part (21) is formed by a plurality of ropes (211) which are obliquely interwoven along the up-down direction to form a net face, wherein part of the ropes (211) are connected to the second face part (22) and the forefoot body (11), and the remaining part of the ropes (211) are connected to the second face part (22) and the heel body (12).

2. A shoe of adjustable length according to claim 1, characterized in that The vamp (20) further comprises a connecting part (23) which is arranged between the first face part (21) and the second face part (22) and is configured as a long strip-shaped member which is matched with the contour of the second face part (22); the connecting part (23) is continuously connected to the edge of the second face part (22) and is pointingly connected to the end of the rope (211) in the first face part (21).

3. A shoe of adjustable length as claimed in claim 2, wherein, The connecting part (23) comprises a first connecting section (231) and a second connecting section (232) which are connected to each other; the lower end of the first connecting section (231) is connected to the forefoot body (11) and extends upwards; the lower end of the second connecting section (232) is connected to the heel body (12) and extends upwards; the upper ends of the first connecting section (231) and the second connecting section (232) are connected to each other.

4. A shoe of adjustable length as claimed in claim 3, wherein, The first connecting section (231) extends from the lower end to the upper end in a bending mode and is concave towards the front direction, and the upper end is flush with the lower end along the front-rear direction.

5. The adjustable length shoe of claim 2 wherein, The connecting part (23) is made of thermoplastic polyurethane elastomer, nylon or polyolefin elastomer.

6. The adjustable length shoe of claim 1 wherein, The first nesting part (111) is provided with a nesting groove (112) which is open towards the rear direction, and the second nesting part (121) is provided with a nesting head (122) which is convex towards the front direction, the nesting head (122) is inserted into the nesting groove (112) to form a nesting connection.

7. A shoe of adjustable length as claimed in claim 6, wherein, The upper and lower groove walls of the nesting groove (112) at the middle position in the left-right direction are provided with a first opening (113) and a second opening (114); the nesting head (122) is provided with a first ridge (123) corresponding to the first opening (113) and a second ridge (124) corresponding to the second opening (114); the upper surface of the first ridge (123) is flush with the upper surface of the corresponding position of the shoe sole (10), and the lower surface of the second ridge (124) is flush with the lower surface of the corresponding position of the shoe sole (10).

8. A shoe of adjustable length as claimed in claim 7, wherein, The left and right groove walls of the nesting groove (112) are recessed to form a matching groove (115) extending in the front-rear direction and open at the rear end; the nesting head (122) is provided with a nesting platform (125) matched with the nesting groove (112), and the left and right ends of the nesting platform (125) are provided with a third ridge (126) extending in the front-rear direction corresponding to the matching groove (115); the first ridge (123) and the second ridge (124) are arranged on the upper surface and the lower surface of the nesting platform (125).

9. A length adjustable shoe as claimed in any one of claims 6 to 8, wherein, Further comprising a position adjusting assembly (30); the position adjusting assembly (30) comprises a screw rod (31) and a nut (32); the screw rod (31) is fixedly installed in one of the forefoot body (11) or the heel body (12), and the length direction of the screw rod (31) is consistent with the front-rear direction of the shoe sole (10); the nut (32) is rotatably installed in the other of the forefoot body (11) or the heel body (12) and is screwed with the screw rod (31); the nut (32) is exposed on the surface of the shoe sole (10) and is suitable for being rotated to adjust the position on the screw rod (31).

10. A length adjustable shoe according to claim 9, wherein, The screw rod (31) is fixedly installed in the forefoot body (11) and located in the nesting groove (112); the nut (32) is installed in the heel body (12) and exposed on the surface of the heel body (12); the heel body (12) is provided with an accommodation channel (127) for accommodating the screw rod (31).

Images