Length-adjustable shoe

Abstract

The invention discloses a length-adjustable shoe, comprising: a sole comprising a half sole body and a heel body; 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] The invention relates to the technical field of shoes, in particular to a pair of shoes with adjustable length. Background Art

[0002] In the field of footwear, the fixed size of shoes has always been a problem that troubles consumers and manufacturers. Consumers' foot sizes are not exactly the same in all situations. For example, during exercise, the size of the foot may increase slightly due to accelerated blood circulation and swelling of the foot. In addition, there may be slight differences in the size standards of different brands and styles of shoes, making it difficult for consumers to accurately choose the most comfortable size when purchasing.

[0003] For growing children and adolescents, the changes in foot size are more frequent and significant. Due to rapid growth and development, new shoes may need to be replaced every once in a while, which undoubtedly increases the family's financial burden and also causes unnecessary waste.

[0004] The length of shoes in the prior art, whether they are sports shoes, casual shoes or other types of shoes, is usually fixed. In order to solve the above problem, some tentative solutions have appeared in the market, such as using elastic materials to make the uppers, in order to adapt to the changes of the feet to a certain extent. However, the adjustment effect of this solution is not obvious, and it is difficult to truly adjust the length of the sole. Summary of the invention

[0005] The object of the present invention is to overcome the above-mentioned defects or problems in the background art and to provide a length-adjustable shoe, the length of which can be adjusted to improve the degree of fit with the user's foot.

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

[0007] Technical solution 1: A length-adjustable shoe, comprising: a sole, which includes a forefoot body and a heel body; a first nesting portion is provided at the rear end of the forefoot body, and a second nesting portion is provided at the front end of the heel body; the first nesting portion and the second nesting portion are nested and connected to each other along the front-to-back direction, so that the forefoot body and the heel body can slide relative to each other within a preset range along the front-to-back direction; and an upper, which is compounded on the sole and includes a first face portion and a second face portion; the setting range of the first face portion extends continuously from the forefoot body to the heel body, and is directly connected to the forefoot body and the heel body; the second face portion is connected to the forefoot body and the heel body except the portion connected to the first face portion; the first face portion is formed by weaving a mesh surface by a plurality of ropes obliquely interwoven in the up-down direction, wherein some ropes connect the second face portion and the forefoot body, and the remaining ropes connect the second face portion and the heel body.

[0008] Technical solution 2 based on technical solution 1: the upper also includes a connecting portion, which is arranged between the first surface portion and the second surface portion, and is configured as a long strip-shaped component that matches the contour of the second surface portion; the connecting portion is continuously connected to the edge of the second surface portion, and is point-connected to the end of the rope in the first surface portion.

[0009] Technical solution three based on technical solution two: the connecting portion 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.

[0010] Technical solution 4 based on technical solution 3: the first connecting section extends from bottom to top and is bent forward, with its upper end flush with its lower end in the front-to-back direction.

[0011] Technical solution five based on technical solution two: the connecting portion is made of thermoplastic polyurethane elastomer, nylon or polyolefin elastomer.

[0012] Technical solution six based on technical solution one: the first nesting part is provided with a nesting groove opening backwards, and the second nesting part is provided with a nesting head protruding forwards, and the nesting head is inserted into the nesting groove to form a nesting connection.

[0013] Technical solution seven based on technical solution six: the upper and lower groove walls of the nesting groove in the middle position in the left and right directions 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 sole, and the lower surface of the second ridge is flush with the lower surface of the corresponding position of the sole.

[0014] Technical solution eight based on technical solution seven: the groove walls on the left and right sides of the nesting groove are recessed with matching grooves extending in the front-to-back direction and open at the rear end; the nesting head is provided with a nesting platform matching with the nesting groove, and the left and right ends of the nesting platform are provided with third ridges extending in the front-to-back direction corresponding to the matching groove; the first ridge and the second ridge are arranged on the upper surface and the lower surface of the nesting platform.

[0015] Technical solution nine based on technical solution eight: also 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 body or the heel body, and its length direction is consistent with the front-to-back direction of the sole; the nut is limited forward and backward and rotatably installed on the other of the forefoot body or the heel body, and is threadedly engaged with the screw; the nut is exposed on the surface of the sole and is suitable for adjusting its position on the screw by rotating.

[0016] Technical solution ten based on technical solution nine: the screw is fixedly installed on the forefoot body and is located in the nesting groove; the nut is installed on the heel body and exposed on the surface of the heel body; the heel body is provided with an accommodating channel for accommodating the screw.

[0017] It can be seen from the above description of the present invention that, compared with the prior art, the present invention has the following beneficial effects:

[0018] Technical solution 1 provides a length-adjustable shoe, the core of which is to achieve relative sliding in the front-to-back direction through the nested connection between the forefoot body and the heel body of the sole, and at the same time, to adapt to the change of the length of the sole through the specific structural design of the first face and the second face of the upper. Specifically, the first nested part at the rear end of the forefoot body and the second nested part at the front end of the heel body are nested and connected with each other in the front-to-back direction, so that the length of the sole can be adjusted within a preset range, and the stability and controllability of the sliding process can be ensured by the friction and geometric constraints of the nested structure. The upper adopts a combination design of the first face and the second face. The mesh structure of the first face formed by the inclined interweaving of ropes has strong elasticity and ductility, and can be stretched or contracted adaptively when the length of the sole is adjusted, thereby avoiding the phenomenon of excessive tightness or relaxation of the upper due to the change in length, and ensuring the fit of the shoe to the user's foot. In addition, part of the rope connects the second face with the forefoot body, and the remaining rope connects the second face with the heel body. This segmented connection design further disperses the stress concentration of the upper when the length is adjusted, and enhances the overall stability and durability of the upper. This technical solution significantly improves the fit between the shoe and the user's foot through the synergistic effect of adjustable sole length and adaptive extension of the upper. It is particularly suitable for scenarios where the foot size changes due to exercise, growth or other reasons, and solves the discomfort problem caused by fixed shoe length in the prior art.

[0019] Technical Solution 2 further optimizes the structure of the upper on the basis of Technical Solution 1. By adding a connecting portion between the first face and the second face, a long strip-shaped component is formed and adapted to the contour of the second face, and at the same time, it is continuously connected to the edge of the second face and connected to the end of the rope of the first face in a point-like manner. The connecting portion is used as a transition structure to evenly transfer the tensile or compressive stress generated by the upper during the length adjustment process from the mesh structure of the first face to the second face, thereby avoiding the problem of rope breakage or upper deformation caused by stress concentration. The continuous connection between the connecting portion and the second face enhances the stability of the overall structure of the upper, while the point-like connection with the rope of the first face retains the flexibility and ductility of the mesh structure, so that the upper can maintain its shape and provide sufficient elastic support when adapting to the change in the length of the sole. Therefore, this technical solution further improves the structural stability and comfort of the upper during length adjustment through the reasonable design of the connecting portion, ensuring that users feel better wrapping and adaptability during use.

[0020] Based on Technical Solution 2, Technical Solution 3 refines the specific structure of the connection part, and divides it into a first connection section and a second connection section that are connected to each other. The lower end of the first connection section is connected to the forefoot body and extends upward, and the lower end of the second connection section is connected to the heel body and extends upward, and the upper ends of the two sections are connected. This connection part decomposes the tension on the upper when the length is adjusted into two independent components acting on the forefoot body and the heel body, and transmits them to different areas of the sole through the first connection section and the second connection section, respectively, avoiding the stress concentration phenomenon that may occur in a single connection structure. At the same time, this design enables the connection part to better adapt to the shape changes caused by the forward and backward sliding of the sole, enhances the synergy between the upper and the sole, and thus maintains the overall coordination and stability of the upper when the length of the shoe is adjusted. Therefore, this technical solution further optimizes the mechanical properties of the upper during dynamic adjustment through the segmented design of the connection part, and improves the durability and comfort of the shoe.

[0021] Based on Technical Solution 3, Technical Solution 4 defines the shape of the first connecting section as extending from bottom to top and being bent toward the front, and its upper end is flush with the lower end in the front-to-back direction. The bent shape of the first connecting section can better fit the bent shape of the forefoot part of the shoe when walking or running, thereby reducing the pressure on the front side of the foot when adjusting the writing length and improving the wearing comfort. At the same time, the design of the upper and lower ends being flush front and back ensures the balance of force on the connecting part during the length adjustment process, avoids local stress concentration caused by asymmetric shapes, and further enhances the stability of the upper structure. Therefore, by optimizing the geometric shape of the first connecting section, this technical solution makes the upper structure more in line with the characteristics of the human foot, significantly improving the adaptability and wearing comfort of the shoe.

[0022] Based on Technical Solution 2, Technical Solution 5 limits the material of the connection part to thermoplastic polyurethane elastomer, nylon or polyolefin elastomer. These materials have excellent elasticity and wear resistance, can produce large deformation when stretched or compressed without permanent damage, and have strong recovery ability, ensuring that the connection maintains stable mechanical properties when the length of the sole is frequently adjusted. In addition, these materials also have good weather resistance and chemical corrosion resistance, can adapt to the use requirements in different environments, and extend the service life of the shoes. Therefore, this technical solution further improves the functionality and durability of the connection part by selecting suitable elastic materials, so that the upper can continue to provide stable support and comfort during the length adjustment process.

[0023] Based on Technical Solution 1, Technical Solution 6 refines the specific connection method of the first nesting part and the second nesting part, that is, the first nesting part is provided with a nesting groove opening toward the rear, and the second nesting part is provided with a nesting head protruding toward the front, and the nesting head is inserted into the nesting groove to form a nesting connection. By matching the geometric shapes of the nesting groove and the nesting head, it is ensured that the relative sliding of the forefoot body and the heel body in the front-to-back direction has high stability and guidance, and the possible deviation or detachment during the sliding process is avoided. At the same time, the design of the nesting groove opening toward the rear makes the nesting head subject to certain geometric constraints after insertion, which can effectively prevent the sole from accidentally separating due to external forces during use. Therefore, this technical solution further enhances the reliability and safety of the sole length adjustment mechanism through the optimized design of the nesting structure, providing users with a more stable use experience.

[0024] Technical Solution 7 is based on Technical Solution 6, and further optimizes the structure of the nesting groove and the nesting head, that is, the upper and lower groove walls in the middle position of the left and right directions of the nesting groove are provided with a first opening and a second opening, and the nesting head is provided with a first convex ridge and a second convex ridge, and the upper surface of the first convex ridge is flush with the upper surface of the sole, and the lower surface of the second convex ridge is flush with the lower surface of the sole. Through the setting of the opening and the convex ridge, the contact area and the constraint point between the nesting groove and the nesting head are increased, thereby enhancing the stability and shear resistance of the connection structure, and avoiding local deformation or damage of the sole due to uneven force during the sliding process. At the same time, the design of the first convex ridge and the second convex ridge being flush with the sole surface makes the upper and lower surfaces of the sole as a whole flat, reducing the foreign body sensation that the user may feel when wearing it, and improving the wearing comfort. Therefore, this technical solution further improves the reliability and wearing comfort of the sole nesting connection through structural optimization.

[0025] Technical Solution 8 is based on Technical Solution 7, and further refines the structure of the nesting groove and the nesting head, that is, the groove walls on the left and right sides of the nesting groove are recessed with matching grooves extending in the front-to-back direction and open at the rear end, and the nesting head is provided with a nesting platform, and the left and right ends of the nesting platform are respectively provided with third ridges extending in the front-to-back direction, and the first ridge and the second ridge are provided on the upper and lower surfaces of the nesting platform. Through the provision of the matching groove and the third ridge, the guidance and stability of the forefoot body and the heel body during the sliding process are further enhanced, and the deviation in the left and right directions is avoided. At the same time, the design of the open rear end of the matching groove facilitates the assembly and disassembly of the nesting head, and the provision of the first ridge and the second ridge on the nesting platform provides additional force support on the basis of ensuring the flatness of the surface, thereby improving the compression and shear resistance of the overall structure of the sole. Therefore, this technical solution further optimizes the stability and operation convenience of the sole length adjustment through the refined design of the nesting structure, and provides users with a more reliable use experience.

[0026] Technical Solution 9 is based on Technical Solution 8, and adds a position adjustment component, including a screw and a nut. The screw is fixedly installed on one of the forefoot body or the heel body, and the nut is limited in front and back and rotatably installed on the other, and the position on the screw is adjusted by rotation. The spiral motion of the screw and the nut is used to convert the rotational force into linear displacement, so as to achieve precise adjustment and positioning of the relative position between the forefoot body and the heel body. The design of the nut exposed on the surface of the sole and suitable for rotation is convenient for users to operate manually. Through the setting of the position adjustment component, users can accurately adjust the length of the sole according to actual needs, overcoming the defect of fixed shoe size in the prior art. Therefore, this technical solution significantly improves the accuracy and convenience of shoe length adjustment by introducing a precise mechanical adjustment mechanism, providing users with a personalized adaptation experience.

[0027] Based on Technical Solution 9, Technical Solution 10 specifically defines that the screw is fixedly installed in the nesting groove of the forefoot body, the nut is installed in the heel body and exposed on the surface of the heel body, and the heel body is provided with a receiving channel for accommodating the screw. Placing the screw in the nesting groove and connecting it to the heel body through the receiving channel not only fully utilizes the internal space of the sole, but also avoids the influence of the adjustment component on the external shape of the sole and the wearing comfort. The design of the nut exposed on the surface of the heel body is convenient for users to operate from the back of the shoe. At the same time, a receiving channel is provided in the heel body to accommodate the screw when the heel body slides relative to the forefoot body. Therefore, this technical solution further improves the practicality and comfort of shoe length adjustment by optimizing the specific layout of the position adjustment component, providing users with a more convenient and efficient adjustment experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

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

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

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

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

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

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

[0036] Description of main reference numerals:

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

[0038] Upper 20; first face 21; rope 211; second face 22; connecting portion 23; first connecting section 231; second connecting section 232;

[0039] Position adjustment component 30; screw rod 31; nut 32. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are preferred embodiments of the present invention and should not be regarded as excluding other embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In the claims, description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, the use of terms such as "first", "second" or "third" etc. are for distinguishing different objects rather than for describing a specific order.

[0042] In the claims, specification and the above-mentioned drawings of the present invention, unless otherwise explicitly defined, directional words, such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inside", "outside", "up", "down", "front", "back", "left", "right", "clockwise", "counterclockwise", etc., indicating directions or positional relationships are based on the directions and positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the specific protection scope of the present invention.

[0043] In the claims, specification and the above drawings of the present invention, unless otherwise clearly defined, if the term "fixed connection" or "fixed connection" is used, it should be understood in a broad sense, that is, any connection method without a displacement relationship and relative rotation relationship between the two, that is to say, including non-detachable fixed connection, detachable fixed connection, integrated connection and fixed connection through other devices or elements.

[0044] In the claims, description and drawings of the present invention, if the terms "include", "have" and their variations are used, they are intended to mean "including but not limited to".

[0045] Example

[0046] The embodiment of the present invention relates to a shoe with adjustable length, referring to Figure 1 The shoe comprises a sole 10, an upper 20 and a position adjustment component 30. The position adjustment component 30 is Figure 7 Shown in.

[0047] Reference Figure 1 , Figure 2 and Figure 3In the length-adjustable shoe of this embodiment, the sole 10 includes a forefoot body 11 and a heel body 12; the rear end of the forefoot body 11 is provided with a first nesting portion 111, and the front end of the heel body 12 is provided with a second nesting portion 121; the first nesting portion 111 and the second nesting portion 121 are mutually nested and connected along the front-to-back 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-to-back direction; the upper 20 is compounded with the sole 10, and includes a first face portion 21 and a second face portion 22; the first face portion 21 is arranged 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 portion 22 is connected to the forefoot body 11 and the heel body 12 except for the connection portion 23 with the first face portion 21; and the first face portion 21 is woven by a plurality of ropes 211 obliquely interwoven in the up and down directions to form a mesh surface, wherein some ropes 211 connect the second face portion 22 and the forefoot body 11, and the remaining ropes 211 connect the second face portion 22 and the heel body 12.

[0048] The sole 10 will first be introduced below.

[0049] Reference Figure 4 , Figure 5 and Figure 6 The sole 10 includes a forefoot body 11 and a heel body 12 which are independent of each other. 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-to-back direction is based on the conventional direction of the shoe, for example, the toe position points forward and the heel position points backward. The first nesting portion 111 and the second nesting portion 121 are mutually nested and connected along the front-to-back direction. The nested connection here means that one of the first nesting portion 111 and the second nesting portion 121 extends into the other along the front-to-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-to-back direction within a preset limited range, thereby adjusting the length of the sole 10 in the front-to-back direction.

[0050] The first nesting portion 111 is provided with a nesting groove 112 with an opening facing backward, and the second nesting portion 121 is provided with a nesting head 122 protruding toward the front, and the nesting head 122 can be inserted into the nesting groove 112 to form a nesting connection between the forefoot body 11 and the heel body 12. The nesting groove 112 here is a groove-shaped structure, the opening of which is located at the rear end side wall of the forefoot body 11, and is recessed toward the front of the forefoot body 11 to form a space in the groove, and it is surrounded by the groove wall on the circumferential side. The nesting head 122 is a structure with a shape that is adapted to the nesting groove 112, which can be extended into the nesting groove 112, and the circumferential side wall surface of the nesting head 122 will contact the groove wall of the nesting groove 112 to ensure that there is sufficient friction between the two. By matching the geometric shapes of the nesting groove 112 and the nesting head 122, it is ensured that the relative sliding of the forefoot body 11 and the heel body 12 in the front-to-back direction has high stability and guidance, and the possible deviation or separation phenomenon during the sliding process is avoided. At the same time, the design of the nesting groove 112 opening backwards makes the nesting head 122 subject to certain geometric constraints after insertion, which can effectively prevent the sole 10 from accidentally separating due to external forces during use. Therefore, the technical solution further enhances the reliability and safety of the length adjustment mechanism of the sole 10 through the optimized design of the nesting structure, providing users with a more stable use experience.

[0051] In addition, in this embodiment, 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 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 groove walls on the left and right sides of the nesting groove 112 are recessed with matching grooves 115 extending in the front-to-back direction and open at the rear end; the nesting head 122 is provided with a nesting platform 125 matching 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-to-back direction corresponding to the matching 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 connected to the rear end side wall of the forefoot body 11 is provided through the upper groove wall of the nesting groove 112, and a second opening 114 connected to the rear end side wall of the forefoot body 11 is provided through the lower groove wall of the nesting groove 112. The lengths of the first opening 113 and the second opening 114 in the front-to-back direction are substantially the same, and the widths of the two in the left-to-right direction are substantially the same. In addition, the thickness of the upper groove wall of the nesting groove 112 is greater than the thickness of the lower groove wall thereof, so as to improve the comfort when wearing. A matching groove 115 is also provided on the left and right side walls of the nesting groove 112. The matching groove 115 is concave toward the side relative to the left and right groove walls of the nesting groove 112, and extends in the front-to-back direction and is connected to the rear end side wall of the forefoot body 11. The width of the matching groove 115 in the up-down direction is less than the width of the left and right groove walls of the nesting groove 112 in the up-down direction, so as to form a concave structure. The matching groove 115 is integrally matched with the nesting groove 112 to form 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 side surfaces. The thickness of the nesting platform 125 in the up-down direction is roughly adapted to the width of the nesting groove 112 in the up-down direction, so as to be nested in the nesting groove 112. The first ridge 123 is a structure with a certain width in the left-right direction and protruding from the upper surface of the nesting platform 125, and its width in the left-right direction is adapted to the width of the first opening 113, and the thickness change in the front-to-back direction is also adapted to the thickness change of the upper groove wall of the nesting groove 112, so that the change of the upper surface of the sole 10 in the front-to-back direction can be consistent on the forefoot body 11 and the heel body 12, thereby improving the wearing comfort. The second ridge 124 is a structure having a certain width in the left-right direction and protruding from the lower surface of the nesting platform 125. Its width in the left-right direction is adapted to the width of the second opening 114, and its thickness change in the front-back direction is also adapted to the thickness change of the lower groove wall of the nesting groove 112, so that the change 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 having a certain width in the up-down direction and protruding from the left-right surface of the nesting platform 125. Its width in the up-down direction is adapted to the width of the matching groove 115, so that when the nesting head 122 is nested in the nesting groove 112, it can form a nesting fit with the matching groove 115.

[0054] By setting the opening and the ridge, the contact area and the constraint point between the nesting groove 112 and the nesting head 122 are increased, thereby enhancing the stability and shear resistance of the connection structure, and avoiding local deformation or damage of the sole 10 due to uneven force during the sliding process. At the same time, the design of the first ridge 123 and the second ridge 124 being flush with the surface of the sole 10 makes the upper and lower surfaces of the sole 10 as a whole flat, reducing the foreign body sensation that the user may feel when wearing it, and improving the wearing comfort. Therefore, this technical solution further improves the reliability and wearing comfort of the nesting connection of the sole 10 through structural optimization. By setting the matching groove 115 and the third ridge 126, the guidance and stability of the forefoot body 11 and the heel body 12 during the sliding process are further enhanced, and the deviation in the left and right directions is avoided. At the same time, the design of the rear end of the matching groove 115 being open facilitates the assembly and disassembly of the nesting head 122, and the arrangement of the first ridge 123 and the second ridge 124 on the nesting platform 125 provides additional force support on the basis of ensuring the flat surface, thereby improving the compression and shear resistance of the overall structure of the sole 10. Therefore, the technical solution further optimizes the stability and operation convenience of the length adjustment of the sole 10 through the refined design of the nesting structure, providing users with a more reliable use experience.

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

[0056] The position adjustment assembly 30 includes a screw rod 31 and a nut 32; the screw rod 31 is fixedly mounted on one of the forefoot body 11 or the heel body 12, and its length direction is consistent with the front-to-back direction of the sole 10; the nut 32 is rotatably mounted on the other of the forefoot body 11 or the heel body 12 with front-to-back position limitation, and is threadedly engaged with the screw rod 31; the nut 32 is exposed on the surface of the sole 10, and is suitable for adjusting its position on the screw rod 31 by rotating. The screw rod 31 is fixedly mounted on the forefoot body 11 and is located in the nesting groove 112; the nut 32 is mounted on the heel body 12 and is exposed on the surface of the heel body 12; the heel body 12 is provided with an accommodating channel 127 for accommodating the screw rod 31.

[0057] Specifically, in order to accurately adjust the length of the sole 10 and to keep the positions of the forefoot body 11 and the heel body 12 fixed after the positions of the two bodies change, the above-mentioned position adjustment component 30 is provided. Figure 4 , Figure 5 and Figure 7A screw rod 31 is fixedly provided on the forefoot body 11. The outer peripheral surface of the screw rod 31 has threads, and the length direction of the screw rod 31 is consistent with the front-to-back direction of the sole 10. At the same time, a receiving channel 127 is provided on the heel body 12 at a position corresponding to the screw rod 31. The receiving channel 127 also extends in the front-to-back direction and can accommodate the rear end portion of the screw rod 31 after the forefoot body 11 and the heel body 12 are nested and connected. A nut 32 is provided in the middle section of the receiving channel 127. The nut 32 is threadedly connected to the screw rod 31, and the nut 32 is axially limited by the heel body 12. For specific limiting methods, refer to Figure 6 A sink groove may be provided on the heel body 12, and the nut 32 may be placed in the sink groove, and the inner side wall surface of the sink groove in the front-rear direction may be used to limit the axial movement of the nut 32.

[0058] The position adjustment component 30 utilizes the spiral motion of the screw 31 and the nut 32 to convert the rotational force into linear displacement, thereby realizing the precise adjustment and positioning of the relative position between the forefoot body 11 and the heel body 12. The nut 32 is exposed on the surface of the sole 10 and is suitable for rotation, which is convenient for the user to operate manually. Through the setting of the position adjustment component 30, the user can accurately adjust the length of the sole 10 according to actual needs, overcoming the defect of the fixed size of the shoe in the prior art. Therefore, this technical solution significantly improves the accuracy and convenience of shoe length adjustment by introducing a precise mechanical adjustment mechanism, providing users with a personalized adaptation experience.

[0059] Furthermore, the screw 31 is placed in the nesting groove 112 and connected to the heel body 12 through the accommodating channel 127, which not only fully utilizes the internal space of the sole 10, but also avoids the influence of the adjustment component on the external shape and wearing comfort of the sole 10. The design of the nut 32 exposed on the surface of the heel body 12 is convenient for users to operate from the back of the shoe. At the same time, the accommodating channel 127 is provided in the heel body 12 to accommodate the screw 31 when the heel body 12 slides relative to the forefoot body 11. Therefore, this technical solution further improves the practicality and comfort of shoe length adjustment by optimizing the specific layout of the position adjustment component 30, providing users with a more convenient and efficient adjustment experience.

[0060] The upper 20 is introduced below.

[0061] Specifically, the length adjustment of the shoe is not only related to the sole 10, but also to the upper 20, because after the length of the sole 10 changes, the upper 20 compounded with the sole 10 will also deform in the length change area. Figure 1In this embodiment, the upper 20 is divided into a first surface 21, a second surface 22 and a connecting portion 23. The first surface 21 is woven by a plurality of ropes 211 to form a mesh structure, and the second surface 22 can be made of conventional fabric, leather or other materials, which are not limited here. In addition, the material of the rope 211 in the first surface 21 is not limited here, and it can be made of yarn made of chemical fiber, natural fiber, etc., or directly use a synthetic rope-shaped polymer material component.

[0062] The key to the first surface 21 in this embodiment lies in its woven structure. Figure 1 The ropes 211 in the first face 21 include two groups, each group includes a plurality of ropes 211, the ropes 211 in the first group extend obliquely from top to bottom and from front to back, the ropes 211 in the second group extend obliquely from top to bottom and from back to front, and the density of the two groups of ropes 211 is appropriate, so that the ropes 211 in the two groups can be interwoven with each other to form a mesh, wherein 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] In addition, the upper 20 further includes a connecting portion 23, which is disposed between the first face portion 21 and the second face portion 22 and is configured as a long strip-shaped member adapted to the contour of the second face portion 22; the connecting portion 23 is continuously connected to the edge of the second face portion 22, for example, by suturing connection, bonding, etc., and is point-connected with the end of the rope 211 in the first face portion 21, where generally pressing connection, bonding, etc. can be used. Moreover, 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 of the connecting portion 23 with the first face portion 21 and the second face portion 22 uniformly transfer the tensile or compressive stress generated by the upper 20 during the length adjustment process from the mesh structure of the first face portion 21 to the second face portion 22, thereby avoiding the problem of rope 211 breakage or upper 20 deformation caused by stress concentration. The continuous connection between the connecting portion 23 and the second surface portion 22 enhances the stability of the overall structure of the upper 20, while the point-shaped connection with the rope 211 of the first surface portion 21 retains the flexibility and ductility of the mesh structure, so that the upper 20 can maintain its shape and provide sufficient elastic support when adapting to the length change of the sole 10. Therefore, the technical solution further improves the structural stability and comfort of the upper 20 when the length is adjusted through the reasonable design of the connecting portion 23, ensuring that the user feels a better wrapping feeling and adaptability 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 a first connecting segment 231 and a 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 upward; the lower end of the second connecting segment 232 is connected to the heel body 12 and extends upward; the upper ends of the first connecting segment 231 and the second connecting segment 232 are connected. The connecting portion 23 decomposes the tension on the upper 20 when the length is adjusted into two independent components acting on the forefoot body 11 and the heel body 12, and transmits them to different areas of the sole 10 through the first connecting segment 231 and the second connecting segment 232, respectively, avoiding the stress concentration phenomenon that may occur in a single connecting structure. At the same time, this design enables the connecting portion 23 to better adapt to the shape change caused by the forward and backward sliding of the sole 10, enhances the synergy between the upper 20 and the sole 10, and thus maintains the overall coordination and stability of the upper 20 when the shoe length is adjusted. Therefore, this technical solution further optimizes the mechanical properties of the upper 20 during dynamic adjustment through the segmented design of the connecting portion 23, thereby improving the durability and comfort of the shoe.

[0065] Furthermore, the first connecting section 231 extends from bottom to top and is bent forward, with its upper end and its lower end flush in the front-to-back direction. The bent shape of the first connecting section 231 can better fit the bent shape of the forefoot portion of the upper 20 when walking or running, thereby reducing the pressure on the front side of the foot when adjusting the writing length and improving the wearing comfort. At the same time, the design of the upper end and the lower end being flush front and back ensures the balance of force on the connecting portion 23 during the length adjustment process, avoids local stress concentration caused by asymmetric shape, and further enhances the stability of the upper 20 structure. Therefore, by optimizing the geometric shape of the first connecting section 231, the technical solution makes the upper 20 structure more in line with the characteristics of the human foot, significantly improving the adaptability and wearing comfort of the shoe.

[0066] The embodiment relates to a length-adjustable shoe, the core of which is to achieve relative sliding in the front-to-back direction through the nested connection between the forefoot body 11 and the heel body 12 of the sole 10, and to adapt to the change of the length of the sole 10 through the specific structural design of the first face 21 and the second face 22 of the upper 20. Specifically, the first nested portion 111 at the rear end of the forefoot body 11 and the second nested portion 121 at the front end of the heel body 12 are nested and connected with each other in the front-to-back direction, so that the length of the sole 10 can be adjusted within a preset range, and the stability and controllability of the sliding process can be ensured by the friction and geometric constraints of the nested structure. The upper 20 adopts a combination design of the first face 21 and the second face 22. The mesh structure of the first face 21 formed by the oblique interweaving of the ropes 211 has strong elasticity and ductility, and can be stretched or contracted adaptively when the length of the sole 10 is adjusted, thereby avoiding the phenomenon of excessive tightness or relaxation of the upper 20 due to the change of length, and ensuring the fit of the shoe to the user's foot. In addition, part of the rope 211 connects the second face 22 and the forefoot body 11, and the remaining rope 211 connects the second face 22 and the heel body 12. This segmented connection design further disperses the stress concentration of the upper 20 when the length is adjusted, and enhances the overall stability and durability of the upper 20. This technical solution significantly improves the degree of fit between the shoe and the user's foot through the synergy of the adjustable length of the sole 10 and the adaptive extension of the upper 20, and is particularly suitable for scenarios where the foot size changes due to exercise, growth or other reasons, and solves the discomfort problem caused by the fixed length of the shoe in the prior art.

[0067] The description of the above specification and embodiments is used to explain the protection scope of the present invention, but does not constitute a limitation on the protection scope of the present invention. Through the enlightenment of the present invention or the above embodiments, ordinary technicians in this field can obtain modifications, equivalent substitutions or other improvements to the embodiments of the present invention or part of the technical features thereof through logical analysis, reasoning or limited experiments, which should be included in the protection scope of the present invention.

Claims

1. A shoe with adjustable length, characterized in that: include: The sole (10) comprises a forefoot body (11) and a heel body (12); the rear end of the forefoot body (11) is provided with a first nesting portion (111), and the front end of the heel body (12) is provided with a second nesting portion (121); the first nesting portion (111) and the second nesting portion (121) are mutually nested and connected along the front-to-back direction, so that the forefoot body (11) and the heel body (12) can slide relatively within a preset range along the front-to-back direction; and A shoe upper (20) is composited with the sole (10) and comprises a first face portion (21) and a second face portion (22); the first face portion (21) is disposed in a range extending 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 portion (22) is connected to the forefoot body (11) and the heel body (12) except for the portion (23) connected to the first face portion (21); The first surface (21) is formed by weaving a mesh surface by a plurality of ropes (211) interwoven obliquely in the up-down direction, wherein part of the ropes (211) connects the second surface (22) and the forefoot body (11), and the remaining part of the ropes (211) connects the second surface (22) and the heel body (12).

2. A length-adjustable shoe as claimed in claim 1, characterized in that: The shoe upper (20) also includes a connecting portion (23), which is arranged between the first surface portion (21) and the second surface portion (22), and is configured as a long strip-shaped component adapted to the contour of the second surface portion (22); the connecting portion (23) is continuously connected to the edge of the second surface portion (22), and is connected to the end of the rope (211) in the first surface portion (21) in a point-shaped manner.

3. A length-adjustable shoe as claimed in claim 2, characterized in that: The connecting portion (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 upward; the lower end of the second connecting section (232) is connected to the heel body (12) and extends upward; The upper ends of the first connecting section (231) and the second connecting section (232) are connected.

4. A length-adjustable shoe as claimed in claim 3, characterized in that: The first connecting section (231) extends from bottom to top and is bent forwardly, with its upper end being flush with its lower end in the front-to-back direction.

5. The length-adjustable shoe according to claim 2, characterized in that: The connecting portion (23) is made of thermoplastic polyurethane elastomer, nylon or polyolefin elastomer.

6. The length-adjustable shoe according to claim 1, characterized in that: The first nesting portion (111) is provided with a nesting groove (112) opening backwards, and the second nesting portion (121) is provided with a nesting head (122) protruding forwards, and the nesting head (122) is inserted into the nesting groove (112) to form a nesting connection.

7. A length-adjustable shoe as claimed in claim 6, characterized in that: The nesting groove (112) has a first opening (113) and a second opening (114) extending through the upper and lower groove walls at the middle position in the left-right direction; the nesting head (122) has a first ridge (123) corresponding to the first opening (113), and has 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).

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

9. A length-adjustable shoe according to any one of claims 6 to 8, characterized in that: The shoe further comprises a position adjustment component (30); the position adjustment component (30) comprises a screw (31) and a nut (32); the screw (31) is fixedly mounted on one of the forefoot body (11) or the heel body (12), and its length direction is consistent with the front-to-back direction of the sole (10); the nut (32) is rotatably mounted on the other of the forefoot body (11) or the heel body (12) with front-to-back limit, and is threadedly engaged with the screw (31); the nut (32) is exposed on the surface of the sole (10), and is suitable for adjusting its position on the screw (31) by rotating.

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

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