Shoe and shoe manufacturing method
By embedding a thermoplastic skeleton in the shoe upper, the problem of discomfort caused by differences in foot width is solved, and the shoe can be adjusted to comfortably adapt to different foot shapes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FUJIAN PUTIAN FANGCHENGXIN SPORTS GOODS CO LTD
- Filing Date
- 2025-03-17
- Publication Date
- 2026-05-12
AI Technical Summary
Due to individual differences, especially differences in foot width, some people experience problems with shoes that are too tight or too loose when wearing standard shoes, making it difficult to find suitable shoes.
A thermoplastic sheet skeleton is embedded in the shoe upper. The thermoplastic deformation of the skeleton changes the tightness or looseness of the shoe upper to adapt to the foot shape needs of different customers.
By adjusting the deformation of the skeleton, it is possible to better adapt to the foot shape needs of different customers, making the shoes more comfortable and solving the problem of discomfort caused by differences in foot width.
Smart Images
Figure CN122004567A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to shoes, and more particularly to shoes and a method of manufacturing shoes. Background Technology
[0002] Shoes are an essential part of daily life. Except for a few custom-made shoes, most shoes on the market are made using standard shoe lasts. However, due to individual differences, even if feet are the same length, their width can vary. Shoes made with standard shoe lasts sometimes cause discomfort due to insufficient width, while exchanging for a larger size may result in the shoe being the right width but the wrong length. Such customers often find it difficult to buy shoes that fit properly. Summary of the Invention
[0003] The purpose of this invention is to provide a size-adjustable shoe and a method for manufacturing the shoe.
[0004] To achieve the above objectives, the present invention proposes a shoe comprising an upper, wherein a thermoplastic sheet-like skeleton is embedded in the upper, the bottom end of the skeleton is fixedly connected to the bottom of the upper, and the skeleton extends at least in the height direction of the shoe to support the upper, thereby changing the degree of contraction or expansion of the upper through thermoplastic deformation of the skeleton.
[0005] Preferably, the skeleton includes a first skeleton disposed at a position corresponding to the instep of the human foot, at least a portion of the first skeleton extending in a direction around the instep of the human foot.
[0006] Preferably, the first skeleton extends continuously from the left end of the bottom of the upper to the right end of the bottom of the upper.
[0007] Preferably, the first frame includes a left first frame and a right first frame respectively located on the left and right sides of the shoe upper.
[0008] Preferably, an insertion port is fixedly provided on both the left and right sides of the shoe upper, and the left first frame and the right first frame are respectively inserted and fixed into the insertion port on the left side of the shoe upper and the insertion port on the right side of the shoe upper.
[0009] Preferably, the upper ends of the left and right first frames expose the insertion opening, and the upper ends of the left and right first frames are provided with perforations for shoelaces to pass through.
[0010] Preferably, the first skeleton includes a plurality of first skeleton units, which are spaced apart along the length of the shoe.
[0011] Preferably, the upper includes a U-shaped tongue groove at the upper end for accommodating the tongue; a left first frame and a right first frame are respectively located on the left and right sides of the tongue groove, and the upper ends of the left first frame and the right first frame are fixedly connected to the width edge of the tongue groove.
[0012] Preferably, both the left first frame and the right first frame include a first extension extending along the width edge of the tongue groove and a second extension extending downward from the first extension. The first extension is fixedly connected to the width edge of the tongue groove, and the second extension is fixedly connected to the bottom of the upper.
[0013] Preferably, the second extension is a strip-shaped structure, and multiple extensions are spaced apart along the length of the shoe.
[0014] Preferably, the left first frame and the right first frame are disconnected, or the left first frame and the right first frame are fixedly connected as one piece at the front end of the shoe tongue groove.
[0015] Preferably, the skeleton further includes a second skeleton disposed at the position corresponding to the heel of the human foot.
[0016] This invention also proposes a method for manufacturing shoes, comprising the following steps:
[0017] A) Manufacturing shoe uppers;
[0018] B) Securely connect the shoe upper and sole;
[0019] Step A) further includes the following sub-steps:
[0020] A1) provides a thermoplastic sheet-like skeleton.
[0021] A2) The skeleton is embedded in the upper, the skeleton being fixedly connected to at least the bottom of the upper, and the skeleton extending at least in the height direction of the shoe to support the upper.
[0022] Preferably, step A1) further includes: providing a left first skeleton and a right first skeleton symmetrical on the left and right sides of the shoe upper;
[0023] Step A2) further includes: inserting the left first skeleton and the right first skeleton into the space between the inner and outer layers of the shoe upper along the left and right sides of the shoe upper; sewing the inner and outer layers of the shoe upper at the width edges corresponding to the left and right sides of the tongue groove on the shoe upper and simultaneously sewing and fixing the left first skeleton and the right first skeleton; the left first skeleton and the right first skeleton are set at the position corresponding to the instep of the human foot and extend at least partially in the direction around the instep.
[0024] Preferably, step A2) further includes: inserting the skeleton from the front end of the tongue groove between the inner layer and the outer layer of the shoe upper, the skeleton extending in a U-shape along the tongue groove, sewing the inner layer and the outer layer of the shoe upper at the positions corresponding to the width edges on the left and right sides of the tongue groove on the shoe upper and simultaneously sewing and fixing the skeleton, at least a portion of the skeleton is set at the position corresponding to the instep of the human foot and extends in the direction of wrapping around the instep.
[0025] Preferably, step A2) further includes: opening at least one slot on the outer side of the shoe upper, inserting and fixing the skeleton in the slot, wherein at least a portion of the skeleton is positioned corresponding to the instep of the human foot and extends in a direction around the instep.
[0026] Preferably, step A2) further includes: forming at least one embedding channel for inserting a skeleton between the inner layer and the outer layer of the shoe upper, the embedding channel extending continuously from the left side of the shoe upper to the right side of the shoe upper, embedding the skeleton in the embedding channel, at least a portion of the skeleton being positioned corresponding to the instep of the human foot and extending in a direction around the instep.
[0027] The beneficial effects of this invention are as follows:
[0028] In this invention, a thermoplastic sheet-like skeleton is embedded in the shoe upper, with its bottom end fixedly connected to the bottom of the upper. The skeleton extends at least in the height direction of the shoe to support the upper, and the degree of contraction or expansion of the upper is changed through the thermoplastic deformation of the skeleton. This allows for better adaptation to the usage needs of different customers, making the shoes more comfortable to wear. When adjusting the shoe width, the skeleton is first heated and softened, then the foot is inserted into the shoe, stretching it to the appropriate shape. After the skeleton cools and sets, shoes suitable for different foot sizes are obtained. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the shoe in Embodiment 1 of the present invention (firstly, showing the situation where a person's foot is put into the shoe);
[0030] Figure 2 This is a schematic diagram of the shoe in Embodiment 1 of the present invention (secondly, showing the skeleton);
[0031] Figure 3 This is a schematic diagram showing the unfolded upper of the shoe in Embodiment 1 of the present invention;
[0032] Figure 4 This is a schematic diagram of a shoe according to a modified embodiment of Embodiment 1 of the present invention;
[0033] Figure 5 This is a schematic diagram showing the unfolded upper of a modified embodiment of the present invention, 1.
[0034] Figure 6 This is a schematic diagram of the shoes in Embodiment 2 of the present invention;
[0035] Figure 7 This is a schematic diagram of the shoe in Embodiment 3 of the present invention. Detailed Implementation
[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the art or in accordance with the product manual.
[0037] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.
[0038] Example 1:
[0039] For ease of understanding, Figure 1 A schematic diagram of a shoe and a human foot being put into it is shown. The human foot 4 includes the instep 41. For different people, the thickness and width of the foot at the instep 41 position often vary. Even when wearing shoes of the same length and size, it is very likely that the shoe will feel tight or loose at the instep 41 position. Similarly, there is a similar problem at the heel 42 position. The shoe 100 includes an upper 1 and a sole 2, wherein the upper 1 further includes an inner layer 5 and an outer layer 6. The shoe 100 is only shown as one type, specifically a shoe with a tongue. The shoelaces are not shown in the figure. The shoe 100 may or may not have shoelaces. It is understood that other types of shoes can also be applied to this embodiment. For ease of description, this embodiment describes the orientation of the shoe 100 in a static use state.
[0040] like Figure 2 As shown, a thermoplastic skeleton is embedded in the upper 1. The skeleton includes a first skeleton 31 and a second skeleton 32. Both the first skeleton 31 and the second skeleton 32 are sheet-like structures embedded between the inner layer 5 and the outer layer 6 of the upper 1. The first skeleton 31 is positioned at the instep 41, i.e., the left and right sides of the upper 1, and the second skeleton 32 is positioned at the heel 42, i.e., the rear end of the upper 1. Both the first skeleton 31 and the second skeleton 32 extend in the height direction of the shoe 100 to support the upper 1. The bottom ends of both the first skeleton 31 and the second skeleton 32 are fixedly connected to the bottom 3 of the upper. In this embodiment, the height direction of the shoe 100 is further interpreted as the direction of extension from the bottom to the top of the upper 1. As rigid structures embedded within the soft upper 1, the first skeleton 31 and the second skeleton 32 can support the bending structure of the upper 1 itself; that is, the deformation of the first skeleton 31 and the second skeleton 32 can also cause the upper 1 to deform.
[0041] See Figure 2 and Figure 3The first frame 31 is positioned on the instep 41 of the foot 4 and extends partially around the instep 41. The direction around the instep 41 is as follows: Figure 1 As shown in the Z0-Z1 direction, the first frame 31 can provide almost complete support for the parts of the upper 1 corresponding to the instep 41 on both sides. In this embodiment, the upper 1 also includes a U-shaped tongue groove 36 at the upper end for accommodating the tongue 37. The first frame 31 includes a left first frame 311 located on the left side of the tongue groove 36 and a right first frame 312 located on the right side of the tongue groove 36. The upper ends of the left first frame 311 and the right first frame 312 are fixedly connected to the width edge 33 of the tongue groove 36. During manufacturing, the inner layer 5 and the outer layer 6 are stacked to form the upper 1 (there may be other layers between the inner layer 5 and the outer layer 6, depending on the shoe). Depending on the manufacturing process of the shoe, the inner layer 5 and the outer layer 6 are connected at the width edge 33 of the tongue groove 36, for example, by sewing. At this time, the left first skeleton 311 and the right first skeleton 312 inserted between the inner layer 5 and the outer layer 6 can also be fixed to the width edge 33 of the tongue groove 36 by means of the connection process of the inner layer 5 and the outer layer 6. For example, the left first skeleton 311 and the right first skeleton 312 are also sewn to the width edge 33 of the tongue groove 36, thereby ensuring that the first skeleton 31 will not easily shift.
[0042] Both the left first frame 311 and the right first frame 312 include a first extension 313 and a second extension 314 extending downward from the first extension 313. The first extension 313 is fixedly connected to the width edge 33 of the tongue groove 36, and the second extension 314 is fixedly connected to the bottom 34 of the upper. The first extension 31 extends along the width edge 33 and connects to it, making the connection between the first frame 31 and the width edge 33 more stable. The second extension 314 extends downward around the instep 41 to support the upper 1 in the height direction. At the same time, the second extension 314 is connected to the bottom 34 of the upper, further ensuring that the first frame 31 will not easily shift. In this embodiment, the second extension 314 is a strip structure with multiple extensions spaced apart along the length of the shoe. This saves material. In other embodiments, the second extension 314 can also be a single sheet structure.
[0043] The second skeleton 32 is embedded into the upper 1 through a manufacturing method similar to that of the first skeleton 31, which will not be described in detail here.
[0044] In this embodiment, the skeleton is made of a low-temperature thermoplastic material, such as polyisoprene (Eucommia ulmoides molding compound), which has good hardness and rigidity after cooling. Specifically, the thermoplastic skeleton can be deformed by heating, such as by heating with a hair dryer or soaking in hot water to soften it. After purchasing the shoe, the customer first softens the skeleton by heating it, then inserts their foot into the shoe to stretch or compress it into a suitable shape, thereby changing the degree of contraction and expansion of the upper 1, making the shoe 100 fit better. Finally, the skeleton is allowed to cool and set to obtain a shoe suitable for different foot shapes.
[0045] In this embodiment, the left first frame 311 and the right first frame 312 are disconnected and are inserted into the left and right sides of the shoe upper 1 respectively during manufacturing. (See reference...) Figure 4 and Figure 5 A modified example of this embodiment is shown, in which the left first frame 311' and the right first frame 312' are fixedly connected as one piece at the front end of the tongue groove 36 by a connecting part 35. During manufacturing, it is only necessary to insert the entire first frame between the inner layer 5 and the outer layer 6 of the upper 1 from the front end of the tongue groove 36. Although the structure of the first frame is more complex, it is more convenient to manufacture. At the same time, the integrally connected first frame is less prone to displacement.
[0046] It is foreseeable that the specific shape of the skeleton is not limited. For the first skeleton 31, it is sufficient as long as it is partially positioned corresponding to the instep of the human foot and extends in the direction of the instep. For the second skeleton 32, it is sufficient as long as it is partially positioned corresponding to the heel of the human foot. Both the first skeleton 31 and the second skeleton 32 can be skeletons with a zigzag shape or with pleats to obtain a larger unfolded area, as long as the skeleton can change the degree of tightening or unfolding of the shoe upper 1 through thermoplastic deformation.
[0047] Example 2:
[0048] See Figure 6As shown, the shoe in this embodiment includes a sole 12 and an upper 11, the upper 11 being divided into an inner layer and an outer layer. In this embodiment, the shoe is a shoe without a tongue; more specifically, the upper 11 completely covers the instep of the foot. A thermoplastic sheet-like first skeleton 130 is embedded between the inner and outer layers of the upper 11. The first skeleton 130 includes multiple first skeleton units 13, which are spaced apart along the length of the shoe to form the first skeleton 130. The first skeleton units 13 extend around the instep and continuously from the left end of the bottom 16 of the upper to the right end of the bottom 16 of the upper. The two bottom ends 14 of the first skeleton units 13 are fixedly connected to the left and right ends of the bottom 16 of the upper, respectively, by means of sewing or adhesive bonding. This design of the first skeleton units extending around the instep and continuously from the left end of the bottom 16 of the upper to the right end of the bottom 16 of the upper completely covers the instep of the foot, providing a better fit. The number of first skeleton units 13 is not fixed. Only one first skeleton unit 13 can be set. As long as the first skeleton 130 can cover the instep of the human foot and can change the tightness or looseness of the shoe upper 11 to fit the size of the human foot.
[0049] To address the issue of the first skeleton unit 13, embedded between the inner and outer layers of the shoe upper 11, slipping during wearer movement, an embedding channel 15 shaped like the first skeleton unit 13 is provided between the inner and outer layers of the shoe upper 11. The first skeleton unit 13 is inserted into the embedding channel 15, thus limiting its position. The embedding channel 15 can be pre-formed during the shoe upper 11 molding process. For example, after the inner and outer layers of the shoe upper 11 are stacked, multiple embedding channels 15 are formed by setting several parallel seams. The first skeleton unit 13 is then inserted into the embedding channel 15, and its two ends are connected to the left and right ends of the shoe upper bottom 16. In this embodiment, the skeleton is completely embedded between the inner and outer layers of the shoe upper, effectively concealing the skeleton and making the shoe upper more aesthetically pleasing.
[0050] Example 3:
[0051] See Figure 7As shown, in this embodiment, a thermoplastic sheet-like first skeleton is embedded between the inner layer 21 and the outer layer 22 of the shoe upper. Several insertion slots 28 are formed between the inner layer 21 and the outer layer 22, and the insertion slots 28 are correspondingly arranged on the left and right sides of the shoe upper. Several first skeleton units 23 are inserted into the insertion slots 28. The several first skeleton units 23 are spaced apart along the length of the shoe upper. The several first skeleton units 23 on the left side of the shoe upper form the left first skeleton, and the several first skeleton units 23 on the right side of the shoe upper form the right first skeleton. The lower end 26 of the first skeleton unit 23 is fixedly connected to the lower part 25 of the shoe upper, and the upper end of the first skeleton unit 23 is provided with a perforation 27 for the shoelace 24 to pass through. That is, the first skeleton unit 23 also forms the connection part of the shoelace 24.
[0052] This method of setting pocket-shaped slots 28 on the shoe upper makes it easier to install the first frame.
[0053] In a modified example, the upper end of the first skeleton unit 23 on the same side can be integrally connected.
[0054] Example 4:
[0055] This embodiment proposes a manufacturing method for the shoes in Embodiment 1, comprising the following steps:
[0056] A) Manufacture the upper 1 and the sole 2 separately;
[0057] B) Securely connect the upper 1 and the sole 2.
[0058] Step A) further includes the following sub-steps:
[0059] A1) Provides a thermoplastic sheet-like skeleton;
[0060] A2) Embed the skeleton in the shoe upper.
[0061] The frame includes a first frame 31 and a second frame 32. The first frame 31 is set at the position of the instep 41, that is, the left and right sides of the upper 1. The second frame 32 is set at the position of the heel 42, that is, the rear end of the upper 1.
[0062] If the shoe has a first skeleton 31, the first skeleton 31 is embedded in the upper 1 at the position corresponding to the instep 41. If the shoe has a second skeleton 32, the second skeleton 32 is embedded in the upper 1 at the position corresponding to the heel 42.
[0063] Furthermore, the first frame 31 includes a left first frame 311 and a right first frame 312 symmetrically positioned on the left and right sides of the shoe upper. When inserting the first frame 31, the left first frame 311 and the right first frame 312 are inserted between the inner layer 5 and the outer layer 6 of the shoe upper along the left and right sides of the shoe upper 1. The inner layer 5 and the outer layer 6 of the shoe upper 1 are sewn together at the positions corresponding to the width edges 33 on the left and right sides of the tongue groove 36, and the left first frame 311 and the right first frame 312 are simultaneously sewn and fixed. Then, the other ends of the left first frame 311 and the right first frame 312 away from the tongue groove 36 are fixedly connected to the left and right parts of the bottom 3 of the shoe upper, respectively. After the shoe upper 1 and the sole 2 are fixedly connected, the left first frame 311 and the right first frame 312 extend in the height direction of the shoe to support the shoe upper 1 corresponding to the instep portion.
[0064] The steps of molding the upper 1 from materials such as fabric, leather, or foam, the steps of molding the sole 2, and the steps of connecting the upper 1 and the sole 2 can all be achieved using existing technologies.
[0065] The above method applies to the left first frame 311 and the right first frame 312 that are disconnected from each other. If the left first frame 311 and the right first frame 312 are connected as one piece, such as... Figure 4 The scheme shown is that the first skeleton extends in a U-shape along the tongue groove 36. Then, the first skeleton is inserted from the front end of the tongue groove 36 between the inner layer 5 and the outer layer 6 of the shoe upper. The inner layer 5 and the outer layer 6 of the shoe upper are sewn on the shoe upper 1 at the positions corresponding to the width edges 33 on the left and right sides of the tongue groove 36, and the first skeleton is sewn and fixed at the same time.
[0066] The second skeleton 32 can also be embedded in the way described in this embodiment by inserting the inner layer 5 and the outer layer 6 of the shoe upper 1 and simultaneously sewing them together.
[0067] The manufacturing method of this embodiment is very suitable for shoes with tongue grooves, and the skeleton can be fixed by sewing the inner layer 5 and the outer layer 6 of the upper 1 together, saving manufacturing steps.
[0068] Example 5:
[0069] This embodiment proposes a method for manufacturing the shoes in Embodiment 2, comprising the following steps:
[0070] A) Manufacture the upper 11 and the sole 12 separately;
[0071] B) Securely connect the upper 11 and the sole 12.
[0072] Step A) further includes the following sub-steps:
[0073] A1) Provides a thermoplastic sheet-like skeleton;
[0074] A2) Embed the skeleton in the upper 11.
[0075] In this embodiment, the process of embedding the skeleton into the shoe upper in step A2) is as follows: an embedding channel 15 for inserting the skeleton is formed between the inner layer and the outer layer of the shoe upper. The embedding channel 15 extends continuously from the left side of the shoe upper to the right side, and the skeleton is embedded in the embedding channel. This method of embedding the skeleton ensures that the skeleton will not shift during the embedding process.
[0076] Example 6:
[0077] This embodiment proposes a method for manufacturing the shoes in Embodiment 3, comprising the following steps:
[0078] A) Manufacturing the upper and sole separately;
[0079] B) Securely connect the upper and the sole.
[0080] Step A) further includes the following sub-steps:
[0081] A1) Provides a thermoplastic sheet-like skeleton;
[0082] A2) Embed the skeleton in the shoe upper.
[0083] In this embodiment, the process of embedding the skeleton into the shoe upper in step A2) is as follows: Inserts are provided on the outer sides of the left and right sides of the shoe upper corresponding to the insertion positions of the skeleton; the skeleton is inserted and fixed into the inserts. This type of skeleton can be easily inserted into the shoe upper. The inserts can be designed according to the skeleton; there can be one or more.
[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.
Claims
1. A shoe, including an upper, characterized in that: A thermoplastic sheet-like skeleton is embedded in the shoe upper, the bottom end of which is fixedly connected to the bottom of the shoe upper. The skeleton extends at least in the height direction of the shoe to support the shoe upper, and the degree of tightening or loosening of the shoe upper is changed by the thermoplastic deformation of the skeleton.
2. The shoe according to claim 1, characterized in that: The skeleton includes a first skeleton disposed at a position corresponding to the instep of a human foot, at least a portion of the first skeleton extending in a direction around the instep of the human foot.
3. The shoe according to claim 2, characterized in that: The first frame extends continuously from the left end of the bottom of the upper to the right end of the bottom of the upper.
4. The shoe according to claim 2, characterized in that: The first frame includes a left first frame and a right first frame respectively located on the left and right sides of the shoe upper.
5. The shoe according to claim 4, characterized in that: An insertion port is fixedly provided on both the left and right sides of the shoe upper. The first frame on the left and the first frame on the right are respectively inserted and fixed into the insertion ports on the left and right sides of the shoe upper.
6. The shoe according to claim 5, characterized in that: The upper ends of the left and right first frames expose the insertion opening, and the upper ends of the left and right first frames are provided with perforations for shoelaces to pass through.
7. The shoe according to claim 2, 3, or 5, characterized in that: The first skeleton includes multiple first skeleton units, which are spaced apart along the length of the shoe.
8. The shoe according to claim 4, characterized in that: The upper includes a U-shaped tongue groove at the top for accommodating the tongue; a left first frame and a right first frame are respectively located on the left and right sides of the tongue groove, and the upper ends of the left first frame and the right first frame are fixedly connected to the width edge of the tongue groove.
9. The shoe according to claim 8, characterized in that: Both the left and right first frames include a first extension extending along the width edge of the tongue groove and a second extension extending downward from the first extension. The first extension is fixedly connected to the width edge of the tongue groove, and the second extension is fixedly connected to the bottom of the upper.
10. The shoe according to claim 9, characterized in that: The second extension is a strip-shaped structure, and multiple extensions are spaced apart along the length of the shoe.
11. The shoe according to claim 9, characterized in that: The left first frame and the right first frame are disconnected, or the left first frame and the right first frame are fixedly connected as one piece at the front end of the shoe tongue groove.
12. The shoe according to claim 1, characterized in that: The skeleton also includes a second skeleton positioned at the heel of the foot.
13. A method for manufacturing shoes, characterized in that, Including the following steps: A) Manufacturing shoe uppers; B) Securely connect the shoe upper and sole; Step A) further includes the following sub-steps: A1) provides a thermoplastic sheet-like skeleton. A2) The skeleton is embedded in the upper, the skeleton being fixedly connected to at least the bottom of the upper, and the skeleton extending at least in the height direction of the shoe to support the upper.
14. The method for manufacturing shoes according to claim 13, characterized in that, Step A1) further includes: providing a left first skeleton and a right first skeleton symmetrical on the left and right sides of the shoe upper; Step A2) further includes: inserting the left first skeleton and the right first skeleton into the space between the inner and outer layers of the shoe upper along the left and right sides of the shoe upper; sewing the inner and outer layers of the shoe upper at the width edges corresponding to the left and right sides of the tongue groove on the shoe upper and simultaneously sewing and fixing the left first skeleton and the right first skeleton; the left first skeleton and the right first skeleton are set at the position corresponding to the instep of the human foot and extend at least partially in the direction around the instep.
15. The method for manufacturing shoes according to claim 13, characterized in that, Step A2) further includes: inserting the skeleton from the front end of the tongue groove between the inner layer and the outer layer of the shoe upper, the skeleton extending in a U-shape along the tongue groove, sewing the inner and outer layers of the shoe upper at the positions corresponding to the width edges on the left and right sides of the tongue groove on the shoe upper and simultaneously sewing and fixing the skeleton, at least a part of the skeleton is set at the position corresponding to the instep of the human foot and extends in the direction of wrapping around the instep.
16. The method for manufacturing shoes according to claim 13, characterized in that, Step A2) further includes: opening at least one slot on the outer side of the shoe upper, inserting and fixing the skeleton in the slot, with at least a portion of the skeleton positioned corresponding to the instep of the human foot and extending in a direction around the instep.
17. The method for manufacturing shoes according to claim 13, characterized in that, Step A2) further includes: forming at least one embedding channel for inserting a skeleton between the inner layer and the outer layer of the shoe upper, the embedding channel extending continuously from the left side of the shoe upper to the right side of the shoe upper, embedding the skeleton in the embedding channel, at least a portion of the skeleton being positioned corresponding to the instep of the human foot and extending in a direction around the instep.