Shoe with built-in shoehorn and manufacturing method thereof

Abstract

The invention belongs to the technical field of shoemaking, and discloses a shoe with a built-in shoehorn and a manufacturing method of the shoe. According to the shoes, the shoehorn is ingeniously embedded in the rear portion of a common shoe, the effect of wearing the shoes in a hand-free mode is achieved, meanwhile, the complex manufacturing process of traditional hand-free shoes is simplified, cost is reduced, and production efficiency is improved. The shoehorn is composed of the upper half part and the lower half part and is reinforced through shaping materials (such as chemical sheets or hot melt adhesives), the upper half part forms a sliding way facilitating sliding-in of heels, and the wearing comfort is improved. The manufacturing method disclosed by the invention is simple and easy to implement, does not need complex structural modification or tedious procedures, is suitable for large-scale production, and has a wide application prospect.

Description

Technical Field

[0001] The invention relates to the technical field of shoemaking, in particular to a pair of shoes with a built-in shoe horn, which aims to cleverly add a shoe horn to the heel of an ordinary shoe through a unique shoemaking method to achieve the same effect as other hands-free shoe technologies, while simplifying the shoemaking process, reducing costs and improving production efficiency. Background Art

[0002] At present, various types of hands-free shoe products have appeared on the market, especially for the elderly, the disabled and people in special occupations, who have an urgent need for easy-to-wear and convenient shoes. The emergence of hands-free shoe products has helped this consumer group to a great extent. However, due to structural reasons, the current hands-free shoe products have some problems in the shoemaking process. For example, application number CN2023236593269 discloses a heel structure that is easy to put on and take off. The heel piece, the fixing piece, the support piece, and the mounting piece are made of thermoplastic plastics. The hot melt adhesive net is heated and covered on each piece. When making a pedal structure, the thermoplastic plastic plate is heated, the material becomes soft, and the hot melt adhesive net on it becomes sticky after heating. The heel piece, the fixing piece, the support piece, and the mounting piece are then processed by simple bending and pasting, and finally cooled to complete the shaping of the pedal structure. Using this structure, the operation is complicated, the labor cost is high, and the shoemaking efficiency for different sizes of the back helper is slow. For example, Chinese application number CN2023227668482 discloses a hands-free, easy-to-wear medical shoe, including an easy-to-wear device, and Chinese application number CN2022900002255 discloses a footwear item including a heel cup, and Japanese application number JP2023075620 discloses a heel core for shoes. These different names are essentially the back support parts of the shoe. In actual shoemaking operations, this back support part must go through complex heel wrapping processes such as multi-layer material stacking, positioning, spraying, and flipping to fix it in the back of the shoe.

[0003] Although the above-mentioned hands-free shoes provide a certain convenience, they increase the difficulty and cost of shoemaking and reduce production efficiency. In addition, the complex heel wrapping process may also lead to unstable product quality, especially the glue spraying process, which is difficult to control the amount of glue, resulting in frequent glue leakage from the inner part of the back of the shoe after the shoe is formed and unlasted. At present, the upper-making workshop usually combines positioning, glue spraying and upper turning into one process. The average labor cost for each pair of shoes is 0.8-1 yuan, while the upper turning of ordinary shoes only costs about 0.3 yuan. For shoemaking companies, how to simplify the shoemaking process and reduce costs while maintaining the hands-free shoe function has become an urgent problem to be solved.

[0004] The present invention aims to improve the problems of existing hands-free shoes. Through innovative design and combined with traditional manufacturing processes, a hands-free shoe with novel appearance, easy production and reasonable cost is provided, thereby meeting the technical requirements of the shoemaking industry and the consumer needs of the majority of hands-free shoe consumers. Summary of the invention

[0005] In order to solve the problem of complicated manufacturing process and high cost of the existing hands-free shoes, the present invention provides a shoe with a built-in shoe horn, the innovation of which lies in a unique shoe manufacturing method. The specific technical solution is as follows: the shoe adopts conventional shoe opening, shoe middle upper, shoe front upper, shoe back upper, insole, midsole and shoe bottom structural parts, without complicated structural changes. At the shoe back upper, a multi-curved shoe horn is cleverly added through a unique shoe manufacturing method to achieve the effect of hands-free shoes.

[0006] According to some embodiments of the present invention, the shoe horn has multiple curved shapes with different curvature radii, including an upper half and a lower half, wherein the upper half is tilted backward in the side view, and is tilted forward in the shape of a bracket on both sides in the plan view, forming a guiding structure that facilitates the heel to slide smoothly into the shoe; the lower half is bulged spherically toward the rear in the side view, and is tilted forward in the shape of a bracket on both sides in the top view, forming a shape that fits the heel; the shoe horn includes a structure fixed to the back of the shoe.

[0007] According to some embodiments of the present invention, the shoe horn is installed in a simple manner without the need for a cumbersome heel wrapping process. In the shoemaking process, the sewing portion at the top of the shoe horn is fixed to the top of the shoe upper by sewing, and then in the upper turning process, the lower half of the shoe horn is sewn together with the upper material and the lining material, so that the shoe horn is firmly installed on the shoe upper.

[0008] According to some embodiments of the present invention, the bottom of the shoe horn is reinforced with shaping materials such as chemical sheets or hot melt adhesives to ensure the shape stability and support force of the shoe horn. At the same time, the bottom of the shoe horn is sewn to the bottom of the shoe upper to further fix its position.

[0009] According to some embodiments of the present invention, the shoe horn is made of a supporting and elastic resin material, such as new high-elasticity materials such as TPU, TPE or TPEE. These materials have good elasticity and toughness, can provide sufficient supporting strength, and have the advantages of wear resistance, durability, and high temperature resistance, thereby ensuring the durability and durability of the shoe horn.

[0010] The height of the upper part is less than half of the height of the lower part. The connection between the upper part and the lower part is in an arc-shaped transition and forms a convex part toward the shoe cavity. In the front view, the top of the shoe horn is in an arc shape, and the two side edges of the top gradually widen and extend obliquely downward from the upper part to the lower part.

[0011] Compared with the existing hands-free shoe technology, the shoe with a built-in shoe horn of the present invention has the following beneficial effects.

[0012] - By simply adding a shoe horn to the heel of an ordinary shoe, the same effects as other hands-free shoe technologies can be achieved, such as improving the convenience and comfort of putting on shoes, meeting consumers' demand for hands-free shoes.

[0013] - The shoemaking process is greatly simplified, eliminating the need for complex structural design and multiple processes, which reduces the difficulty and cost of shoemaking, improves production efficiency, and enables companies to produce shoes with hands-free functions at a lower cost.

[0014] - Product quality is more stable. Due to the simplification of shoemaking process, the complexity and error rate of manual operation are reduced, ensuring the consistency of shoe appearance and performance.

[0015] - Suitable for mass production, due to the simplification of shoemaking process and the reduction of cost, enterprises can more easily achieve mass production and meet the large demand for hands-free shoes in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0017] Figure 1 A side view of a shoe with a built-in shoe horn provided by an embodiment of the present invention.

[0018] Figure 2 A right side view of a built-in shoe horn provided by an embodiment of the present invention.

[0019] Figure 3 A front view of a built-in shoe horn provided by an embodiment of the present invention.

[0020] Figure 4 A three-dimensional diagram of a built-in shoe horn provided by an embodiment of the present invention.

[0021] Figure 5 A top view of a built-in shoe horn provided by an embodiment of the present invention.

[0022] Figure 6 A bottom view of a built-in shoe horn provided by an embodiment of the present invention.

[0023] Figure 7 This is a longitudinal cross-sectional view of the back of a shoe with a built-in shoe horn provided by an embodiment of the present invention, wherein the oblique line portion in the figure is a filling material.

[0024] Figure 8 A structural stereoscopic diagram of a shoe horn and a shaping material of a shoe with a built-in shoe horn provided by an embodiment of the present invention.

[0025] In the drawings: shoe 1 , shoe back 10 , shoe back top 11 , raised structure 12 , shoe horn 100 , upper part 101 , lower part 102 , raised part 103 , sewing part 104 , shaping material 105 . DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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.

[0027] Combine the following Figure 1-8 Embodiments of the present invention are described.

[0028] like Figure 1 As shown, an embodiment of the present invention provides a shoe with a built-in shoe horn, including a shoe upper 10, and a shoe horn 100 formed between a surface material of the shoe upper and an inner lining material.

[0029] For details, see Figure 2-6 The shoe horn 100 comprises an upper part 101 and a lower part 102. The upper part 101 is Figure 2 In the middle, the upper part tilts backward; Figure 5 The two sides are in a bracket-shaped arc shape and tilt forward to form a slideway that allows the heel to slide into the shoe. The lower half 102 is Figure 2 In the middle, it bulges backwards in a spherical shape. Figure 6 In the middle, the two sides are slanted forward in the shape of a bracket, forming a shape that fits the heel.

[0030] Specifically, the upper portion has an inclination angle of 10 to 30 degrees to optimize the sliding effect of the heel.

[0031] Specifically, the shoe horn 100 includes a structure fixed to the shoe upper. Figure 3 The top of the shoe horn 100 has a sewing portion 104 at the center in the left-right direction for fixing to the upper end of the shoe upper. In this embodiment, the sewing portion 104 has a horizontal width of more than 0.5 cm and a thickness of 0.05 cm.

[0032] Specifically, the horizontal width of the upper part 101 in the left-right direction is smaller than the horizontal width of the heel of a human body. In this embodiment, the width of the upper part 101 is about 4 cm and the thickness is 0.2 cm.

[0033] Specifically, the height of the upper part 101 is less than half of the height of the lower part 102 .

[0034] Specifically, the connection between the upper part 101 and the lower part 102 is in an arc shape, and a convex part 103 is formed toward the shoe cavity. The convex part 103 and the lower part 102 form a shape that closely wraps the heel.

[0035] Specifically, Figure 3 As shown, the top of the shoe horn 100 is in an arc shape, and the two side edges of the top gradually widen and extend obliquely downward from the upper half 101 to the lower half 102. In this embodiment, the width of the lower half 102 is about 6 cm.

[0036] In the traditional method of shaping the back of shoes, in order to keep the shoe body upright and beautiful, a shaping material 105 such as a chemical sheet or a hot melt adhesive is usually added to the back of the shoe 10. The chemical sheet is softened by a solvent and then hardened after being dried in an oven on an assembly line, while the hot melt adhesive is softened by high temperature in an oven and then shaped on the last, and the shape of the last heel is maintained after cooling. Whether it is a chemical sheet or a hot melt adhesive, it needs to be fixed between the upper material and the lining material during the upper making process. During the sewing process of the back of the shoe, the upper material and the lining material are first sewn face to face at the shoe mouth, and then reversed along the seam line, which is the turning process. After turning the upper, the shaping material 105 is sandwiched between the upper material and the lining material.

[0037] In this embodiment, when the upper material and the lining material are face-to-face sewn at the shoe opening, the shoe horn 100 is placed directly opposite to the lining material, and the sewing portion 104 is sewn together with the upper material and the lining material. After the upper is turned, the bracket-shaped depression of the lower half 102 is adjacent to the lining material, and the spherical bulge is adjacent to the upper material. This process is simple to operate and does not require a complicated glue spraying process.

[0038] In this embodiment, after the upper is turned, the shaping material 105 is sandwiched between the upper material and the lining material, close to the upper material side, that is, located on the back of the shoe horn 100.

[0039] In this embodiment, after turning over the upper, the upper material, the bottom of the lower half 102 of the shoe horn 100, the shaping material 105 and the lining material are stretched and overlapped at the bottom of the upper, and the seams are sealed to form an upper foot, which is used to align the upper and the lining when the upper is pulled or the midsole is put on. After sealing, the bottom of the lower half 102 exposed outside the upper foot needs to be trimmed.

[0040] In this embodiment, if Figure 1 and 8As shown, the shaping material 105 is self-adhesive. After the upper is made, the upper surface is shaped by putting on the last, so that the shaping material 105 and the shoe horn 100 are closely attached to each other, and actually form the shape of the half-surrounded heel of the hands-free shoe heel support component currently on the market. The three-dimensional support structure formed by the forward extension of the inner and outer sides of the shaping material 105 effectively plays the role of reinforcing the shoe horn 100, making it not easy to tip over or deform.

[0041] In the embodiment of the present invention, when the shoe horn 100 and the shaping material 105 are integrated, in order to ensure that the thickness of the overlapping portion does not cause a sense of disharmony to the appearance of the shoe, the thickness of the shoe horn 100 in the overlapping portion can be appropriately reduced. For example, the thickness of the upper half 101 of the shoe horn 100 is set to 0.2 cm, and the thickness of the shoe horn 100 in the overlapping portion is adjusted within the range of 0.05 cm to 0.1 cm, thereby minimizing the sense of disharmony in appearance. With this structure, the joint portion of the shoe horn 100 and the shaping material 105 becomes smooth, and the aesthetic appearance and wearing comfort of the shoe are improved.

[0042] In this embodiment, the shoe body made by the process of the present invention is as follows Figure 1 and Figure 7 As shown, the top end 11 of the shoe back extends upward and backward. In the shoe cavity, the raised part 103 forms a raised structure 12 on the inner side of the shoe back, which can hold the heel when the shoe is worn, making the shoe difficult to fall off.

[0043] In this embodiment, in order to provide a comfortable feel for the foot, a cushioning material such as sponge is compounded on the back of the lining material, or / and a filling material is applied to the side of the shoe horn 100 close to the foot.

[0044] According to other embodiments of the present invention, different sizes of the chemical sheets or hot melt adhesives used for shoes of different sizes are different. Since the shoe horn 100 is fixed to the top end 11 of the shoe upper through its sewing portion 104, the bottom of the lower half 102 cannot reach the upper foot position. Figure 7-8 As shown, the height is less than the height of the shoe upper and is suspended in the air. After the positioning points are positioned to ensure that the shoe horn 100 is not skewed, the shaping material 105 and the shoe horn 100 can be closely attached to each other through shaping on the last. Therefore, the shoe horn 100 of the present invention can be used for shoe uppers of different sizes.

[0045] In this embodiment, see Figure 1 The upper part 101 of the shoe horn 100 is tilted backward and upward. The upper part 101 is a support body for the top part 11 of the shoe upper, that is, the top part 11 of the shoe upper is also tilted backward and upward to expand the space for the foot to enter the shoe opening. At the same time, the opening width of the shoe upper is also smaller than the horizontal width of the human heel.

[0046] In this embodiment, see Figure 2-6The upper part of the upper part 101 is tilted backward, and the two sides are tilted forward in a bracket-like arc shape, forming a slideway for the heel to slide into the shoe. With this design, the heel can slide smoothly into the shoe, avoiding friction or obstruction with the shoe back 10, and improving the smoothness and comfort of wearing the shoe.

[0047] In this embodiment, the shoe horn 100 is made of a polymer material such as a resin or a plastic material with a certain support strength and toughness. In terms of material selection, it is recommended to use high-elasticity new materials such as TPU (polyurethane), TPE (thermoplastic elastomer) or TPEE (thermoplastic polyester elastomer). These materials have good elasticity and toughness, can provide sufficient support strength, and have the advantages of wear resistance, durability, and high temperature resistance. Therefore, the shoe horn made of these high-elasticity new materials can effectively meet the structural requirements of the shoes while ensuring wearing comfort and durability.

[0048] In this embodiment, the shoe horn 100 is integrally formed by injection molding using a metal mold. The metal mold is made of 738H mold steel, which has the characteristics of being not easy to be damaged, not easy to age, not easy to deform, and having a long service life, thereby saving maintenance costs. This means that there is no need to frequently replace or maintain the mold during the production process, further reducing production costs.

[0049] In other embodiments of the present invention, the shoe horn 100 can also be made of a shaping material such as a chemical sheet or hot melt adhesive, which can also achieve the effect of hands-free shoe wearing. Specifically, the shoe horn 100 made of the above material is first fixed to the upper end of the heel of the shoe by sewing or bonding, and then the traditional shaping material 105 is clamped together with the upper material and the lining material to be shaped. Although the shoe horn 100 made by this manufacturing method is not as durable as the TPU material, it is suitable for short-life shoes (for example, shoes for temporary activities or shoes for short-term use).

[0050] In this embodiment, when the subject wears the shoe, the front end of the human foot is inserted into the shoe and the heel is pressed down, and the heel slides into the shoe cavity along the inclined upper part 101; when the heel enters the shoe cavity, the raised part 103 clamps the heel, making it difficult for the heel to fall off.

[0051] In this embodiment, the shoe horn 100 includes a center positioning mark aligned with the center position of the shoe upper, and the center positioning mark is a concave or convex geometric shape mark. During the shoemaking process, the center positioning mark can be visually or tactilely identified, and the shoe horn 100 can be accurately aligned with the center position of the shoe upper. The positioning mark adopts a convex or concave geometric shape structure to form an obvious positioning mark. The shape of the mark is circular or linear, the diameter can be 1 mm, and the height or depth can be 0.5 mm, which is preferably identifiable without resting the foot.

[0052] In this embodiment, fine textures are applied to the surface of the shoe horn 100. The depth of these textures is no more than 0.5 mm, and the shapes can be linear, mesh, dotted, frosted, roughened, wavy, spotted, concave-convex, spiral or granular, etc. These textures are distributed on the surface of the shoe horn to increase the contact area and friction.

[0053] In this embodiment, the shoe horn 100 is suitable for a variety of manufacturing processes, including but not limited to: gluing process, sewing process, molding process, injection molding process, vulcanization process, Goodyear process, and wrapping process. These manufacturing processes can be selected according to the characteristics of the material, the availability of production equipment, and different production requirements to ensure that the shoe horn 100 can be effectively fixed in the shoe back 10 and has the required performance and stability.

[0054] In an embodiment of the present invention, a method for manufacturing a shoe with a built-in shoe horn is implemented, comprising the following steps.

[0055] a. Preparation of shoe horn: Use a resin material with support and elasticity (e.g., polyurethane, TPU, TPE, TPEE, chemical sheet, hot melt adhesive, etc.) to make a shoe horn through a molding process (e.g., injection molding, compression molding, cutting or machining molding, etc.). The shoe horn includes an upper part and a lower part. The upper part of the upper part is tilted backward in the side view, and the two sides are arc-shaped and tilted forward in the front view, forming a slide for the heel to slide into the shoe. The lower part expands spherically backward in the side view, and the two sides are arc-shaped and tilted forward in the top view, forming a shape that fits the heel. The connecting part of the upper and lower parts transitions in an arc shape and forms a bulge in the direction of the inside of the shoe. The upper part of the shoe horn is in an arc shape, and the edges on both sides of the upper part are in a shape that expands obliquely downward from the upper part to the lower part.

[0056] b. Installation of the shoe horn: Fix the shoe horn to the upper end of the heel. Specifically, sew or glue the sewn part of the upper part of the shoe horn to the upper end of the heel to ensure that the shoe horn is accurately positioned on the heel so that the heel can slide in effectively and fit with the heel when wearing the shoe.

[0057] c. Uppering process: The specific operation is as follows. First, the upper material and the lining material are sewn together at the shoe opening, and then turned over along the sewing line, which is the uppering process. After uppering, the shoe horn and the shaping material are sandwiched between the upper material and the lining material.

[0058] d. Shaping and strengthening: Shaping (e.g., by heating or pressurizing) is performed so that the shaping material and the shoe horn are closely fitted and integrated, ensuring the shape stability and support of the shoe horn, so that the shoe maintains a good shape and performance when worn.

Claims

1. A shoe with a built-in shoe horn, characterized in that: A shoe upper comprising a shoe horn having a plurality of curved surface shapes with different radii of curvature; The shoe horn comprises an upper part, a lower part and a structure for fixing it to the back of the shoe; The upper part of the upper part is tilted backward in the side view, and the two sides are arc-shaped and tilted forward in the front view, forming a guiding structure for the heel to slide into the shoe; The lower part bulges backward in a spherical shape in a side view, and is curved and tilted forward on both sides in a top view, forming a shape that fits the heel; The connection portion between the upper half and the lower half is in an arc-shaped transition and forms a convex portion in the direction of the inner side of the shoe; The protrusion acts as a raised structure when the footwear is worn, thereby improving the fit of the heel; In the front view, the upper part of the shoe horn is in an arc shape, and the edges on both sides are in a shape of obliquely expanding downward from the upper half to the lower half, and the shoe horn includes a structure fixed to the rear upper of the shoe; The shoe horn is integrated and reinforced by shaping materials such as chemical sheets or hot melt adhesives.

2. The shoe according to claim 1, characterized in that: The top of the shoe horn includes a sewn portion; The sewn portion is fixed to the heel portion by sewing.

3. A shoe with a built-in shoe horn, characterized in that: A shoe horn having a plurality of curved shapes with different radii of curvature; The top end of the shoe back extends backward and upward to expand the foot insertion space at the shoe opening, making it easier to insert the foot; The opening width of the shoe back is also smaller than the horizontal width of the human heel; The raised structure can clamp the heel when the shoe is worn, wrap the heel and fit it tightly, so as to prevent the shoe from falling off during walking or exercise.

4. The shoe according to claim 3, characterized in that: The upper part of the shoe horn is tilted backwards to form a shape that allows the heel to slide easily into the shoe.

5. A method for manufacturing a shoe with a built-in shoe horn, characterized in that: The following steps are involved: a. Preparation of shoe horn: Use a resin material with support and elasticity (e.g., polyurethane, TPU, chemical sheet, hot melt adhesive, etc.) to make the shoe horn through a molding process (e.g., injection molding, compression molding, cutting or machining molding, etc.); b. Installation of the shoe horn: Fix the top of the shoe horn to the upper end of the heel; c. Uppering: sandwich the shoe horn and shaping material between the upper material and the lining; d. Shaping and strengthening: Shaping is performed to make the shaping material and the shoe horn fit closely and become one.

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