Insole capable of adjusting arch support

Abstract

The insole comprises an insole body, the insole body is sequentially provided with a half sole part, a middle foot part and a heel part from front to back, a flexible supporting piece is jointly attached to the lower side face of the middle foot part and the lower side face of the heel part, and the front side of the flexible supporting piece extends forwards to form an extending position; supporting convex parts are arranged in the areas, corresponding to the middle foot part and the extending position, of the flexible supporting piece, and the hardness of the flexible supporting piece is larger than that of the insole body; the flexible supporting piece is provided with an arch-shaped part matched with the inner arch corresponding to the middle foot part, the position of the arch-shaped part is an arc surface, the arch-shaped part is provided with a maximum bending angle, and / or the flexible supporting piece is provided with a matching part matched with the outer arch, the matching part is an arc surface, and the matching part is provided with a maximum bending angle. Due to the arrangement of the cambered surface and the maximum bending angle, a wearer can select the insole body with the corresponding bending angle according to the flat degree of the arch, and the effects of improving the body posture and correcting the arch are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of shoe accessories, and more particularly to an insole for adjusting arch support. Background Art

[0002] For children and teenagers, their feet are in the development stage, and the arch is an important part of the foot. The arch can absorb the impact of the ground on the foot and better promote human activities. However, the insoles currently on the market cannot support the arch well, especially for people with different degrees of arch flatness, so they cannot protect the development of the arch of the foot.

[0003] In view of this, the applicant conducted in-depth research on this basis, which led to the emergence of this case. Summary of the invention

[0004] The purpose of the present invention is to provide an insole for adjusting arch support, which can provide good support for the arch, promote foot development, improve posture, and correct the arch.

[0005] To achieve the above object, the solution of the present invention is: 14. The method of claim 13, wherein the foot support member is an arc portion, a midfoot portion, and a heel portion. The arc portion is a plurality of arc portions that are adapted to support the foot. The arc portion is a plurality of arc portions that are adapted to support the foot. The plurality of arc portions are adapted to support the foot.

[0006] The height of the supporting protrusion is 1.5mm-2.5mm.

[0007] Taking the horizontal plane formed by extending the lower side surface of the insole body as the reference plane, the upper side surface of the forefoot portion is provided with a depression near the midfoot portion, the distance between the depression and the reference plane is a first distance, the distance between the upper side surface of the heel portion and the reference plane is a second distance, and the difference between the first distance and the second distance is 1.5mm-3mm.

[0008] Taking the line segment perpendicular to the center line of the insole body from the heel to the toe in the up-down direction as the reference line, in the cross section of the insole body, the maximum bending angle of the arched portion relative to the horizontal plane with the reference line as the starting point is 2-8°.

[0009] A horizontal plane formed by extending the lower side surface of the insole body is used as a reference plane, and a height from the reference plane to the highest point of the arch portion is 20 mm-30 mm.

[0010] The upper side of the insole body is provided with a plurality of ventilation holes, and the air permeability of the insole body is greater than the air permeability of the flexible supporting sheet.

[0011] The Shore C hardness of the insole body is 25-35°, and the Shore C hardness of the flexible support sheet is 38-45°.

[0012] The front contour of the flexible support sheet is an arc line protruding from the middle of the front side of the flexible support sheet along the forefoot portion, and the supporting convex pad is a convex portion protruding upward from the lower side of the insole body.

[0013] The preparation method comprises the following steps: S1, blank molding, injecting high-permeability PU material into the first foaming mold, and performing foam molding after mold closing to obtain a blank; S2, slicing the blank, cutting the blank into at least two halves along the horizontal direction to obtain at least two pieces of insole material; S3, forming a flexible support sheet, injecting a low-permeability PU material into a second foaming mold, and placing a first hot-melt film covering the cavity of the second foaming mold between an upper mold and a lower mold of the second foaming mold, and performing foaming molding after closing the mold to obtain a flexible support sheet; S4, forming the shock absorbing sheet, by punching or injection molding, to obtain the shock absorbing sheet; S5, hot pressing, heating the upper die of the pressing mold to 170-180° C., heating the lower die of the pressing mold to 140-150° C., then sequentially placing the shock absorbing sheet, the flexible supporting sheet and the insole material into the lower die of the pressing mold, and then closing the pressing mold and maintaining the pressure for 140-180 seconds, and obtaining the hot pressed semi-finished product after opening the mold; S6, hanging the material, pulling the edge of the hot-pressed semi-finished product and hanging it on a drying rack for cooling to obtain a cooled semi-finished product; S7, post-processing, sequentially performing punching, trimming and surface printing on the cooled semi-finished product to obtain an insole.

[0014] In step S2, the blank is cut into two pieces to obtain two pieces of the insole material, and the upper sides of the two insole materials are respectively formed with a plurality of breathable holes, and the lower sides of the two insole materials are respectively formed with smooth sides.

[0015] After adopting the above structure, the present invention has the following beneficial effects: 1. The present invention adopts a setting in which a flexible support sheet extends to the forefoot part. The hardness of the flexible support sheet is greater than that of the insole body, which improves the hardness of the insole corresponding to the transverse arch position, so that the support of the insole moves forward from the mid-waist position, which can better support the human foot. In addition, the support protrusion extends from the mid-foot part to the forefoot part, which improves the comfort of the wearer and supports and adjusts the transverse arch of the foot when the wearer walks.

[0016] 2. The present invention adopts the setting of the curved surface in the flexible support sheet, and the bending angle at the middle waist of the arch of the foot of the flexible support sheet is the largest. The wearer selects the insole body with the corresponding bending angle according to the flatness of his own arch. The flexible support sheet is provided with a curved surface corresponding to the inner arch and / or outer arch, so as to adjust the inner arch and / or outer arch support during the wearer's walking process, thereby improving the posture and correcting the arch of the foot.

[0017] 3. The present invention sets a maximum bending angle in the flexible support sheet, which can adapt to wearers with different degrees of arch flatness according to the conditions of normal arch, mild arch flatness, moderate arch flatness and severe arch flatness, and provide support and adjustment for wearers with different degrees of arch flatness, thereby improving posture and correcting the arch.

[0018] 4. The present invention sets the front and rear drop of the insole body, which has a good sense of contact with the ground, is flexible in movement, and is comfortable, and can promote the development of the feet of children and teenagers.

[0019] 5. The method for making the arch support of the present invention obtains the insole material by cutting the blank. On the one hand, the insole material with good air permeability on the upper side can be directly obtained, and on the other hand, the air permeability process can be omitted, thereby omitting the process steps and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the insole in the first embodiment.

[0021] Figure 2 This is a schematic structural diagram of the insole in Embodiment 1 from another angle.

[0022] Figure 3a It is a schematic diagram of the height of the left and right sides of the insole along the length direction in the first embodiment.

[0023] Figure 3b It is a schematic cross-sectional view of the insole in the first embodiment.

[0024] Figure 4 It is a schematic diagram of the structure of the insole in the second embodiment.

[0025] Figure 5 This is a schematic structural diagram of the insole in the second embodiment from another angle.

[0026] Figure 6a It is a schematic diagram of the height of the left and right sides of the insole along the length direction in the second embodiment.

[0027] Figure 6b It is a schematic cross-sectional view of the insole in the second embodiment.

[0028] Figure 7 It is a schematic diagram of the structure of the insole in the third embodiment.

[0029] Figure 8a It is a schematic diagram of the height of the left and right sides of the insole along the length direction in the third embodiment.

[0030] Figure 8b It is a schematic cross-sectional view of the insole in the third embodiment.

[0031] Fig. 9 It is a structural schematic diagram of the insole in the fourth embodiment.

[0032] Fig.10a It is a schematic diagram of the height of the left and right sides of the insole in the fourth embodiment along the length direction.

[0033] Fig.10b It is a schematic cross-sectional view of the insole in the fourth embodiment.

[0034] In the figure: 100-shoe insole body; 11-forefoot portion; 111-annular groove; 12-midfoot portion; 13-heel portion; 131-side circumference; 132-shock-absorbing sheet; 2-flexible supporting sheet; 21-extended position; 22-supporting protrusion; 23-arched portion; 25-matching portion. DETAILED DESCRIPTION

[0035] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0036] Embodiment 1 like Figure 1 As shown Figure 2As shown, the present embodiment is an insole for adjusting arch support, which is suitable for children or adults with normal arches. The insole body 100 is arranged from front to back as a forefoot portion 11, a midfoot portion 12 and a heel portion 13. The forefoot portion 11 and the midfoot portion 12 as well as the midfoot portion 12 and the heel portion 13 are respectively integrally connected and smoothly transitioned without obvious decomposition. In other words, the forefoot portion 11, the midfoot portion 12 and the heel portion 13 are three parts on the same component.

[0037] In this embodiment, for the convenience of description, the side of the insole body 100 that is relatively close to the human arch when in normal use is the inner side, and the opposite side is the outer side. That is to say, the inner side of the shoe refers to the side opposite to the two feet, and the side opposite to the two feet is the outer side of the shoe. The side of the insole body 100 that corresponds to the instep of the human foot when in normal use is the upper side, and the opposite side is the lower side.

[0038] The lower side surfaces of the midfoot portion 12 and the heel portion 13 are jointly provided with a flexible support sheet 2, the front side of the flexible support sheet 2 extends toward the forefoot portion 11 to form an extension position 21, and the flexible support sheet 2 is provided with a support convex portion 22 corresponding to the area between the front side of the midfoot portion 12 and the extension position, wherein the hardness of the flexible support sheet 2 is greater than the hardness of the insole body 100, so that the support area of ​​the insole is increased, that is, it is moved forward from the mid-waist position of the insole body 100, thereby increasing the hardness of the insole body 100 corresponding to the transverse arch , and the air permeability of the flexible support sheet 2 is less than that of the insole body 100; and, the above-mentioned flexible support sheet 2 is provided with an arch portion 23 that cooperates with the human arch at a position corresponding to the midfoot portion 12, and the arch portion 23 is provided with a curved surface, which corresponds to the inner arch of the human body, and the curved surface is arranged along the inner side from bottom to top; wherein, in the cross section of the insole body 100, the bending angle at the middle waist of the arch portion 23 corresponding to the human arch is the largest, and the arc is arranged along the inner side from bottom to top.

[0039] Specifically, the above-mentioned supporting protrusion 22 is a protrusion formed by the upward protrusion of the lower side of the flexible supporting sheet 2 to play a shock-absorbing role, and the shape of the supporting protrusion 22 is egg-shaped. The height of the supporting protrusion 22 is 1.5mm-2.5mm, which refers to the height between the horizontal plane formed by the extension of the upper side of the insole body 100 when in use and the highest point of the supporting protrusion. When the insole body 100 is in use, the insole body 100 will be flat due to external force. The best height of the supporting protrusion 22 is 2mm to ensure that there is no foreign body sensation or foot-irritation when wearing, and it helps to change the local force friction of the sole and improve sports comfort; wherein, the shape and size of the supporting protrusion 22 are set according to actual conditions, for example, it can be adjusted according to the actual height differences of children, teenagers and adults.

[0040] Furthermore, the above-mentioned flexible support sheet 2 is a PU sheet commonly found on the market. In the present embodiment, the flexible support sheet 2 is a hard PU sheet with high elasticity and low air permeability. The Shore C hardness of the flexible support sheet 2 is 38-45°, and the Shore C hardness of the flexible support sheet 2 is preferably 40°; the insole body 100 is a PU sheet commonly found on the market. In the present embodiment, the insole body 100 is a PU sheet with high elasticity and high air permeability. The Shore C hardness of the insole body 100 is 25-35, and the Shore C hardness of the insole body 100 is preferably 30°; in this way, the forefoot portion 11 of the insole body 100 is easy to bend to adapt to the human foot, and the flexible support sheet 2 is used to provide a stable flexible support for the heel and the arch of the foot, while making the flexible support sheet 2 have a slow rebound effect, thereby achieving a shock absorbing effect. Preferably, the insole body 100 is made of an insole material, and a plurality of holes are formed on the upper side of the insole body 100 , that is, the holes are distributed on the upper side of the insole body 100 to achieve ventilation.

[0041] Furthermore, the above-mentioned flexible support sheet 2 covers the entire extension position 21, the lower side of the midfoot portion 12, the lower side of the heel portion 13 and the arch portion 23. Preferably, the middle part of the front side edge of the flexible support sheet 2 protrudes forward to form the above-mentioned extension position 21, that is, the extension position 21 is located at the forefoot portion 11, and the front contour of the flexible support sheet 2 forms an arc line to match the above-mentioned support bulge 22. In this way, the support of the insole body 100 moves forward from the mid-waist position of the insole body 100 to the rear side of the forefoot portion 11, and the support bulge 22 is located between the rear side of the forefoot portion 11 and the front side of the midfoot portion 12, that is, the support bulge 22 is correspondingly located at the harder flexible support sheet 2, so that the foot feels less divided and more integrated.

[0042] Furthermore, the upper side of the forefoot portion 11 is provided with a low-lying area or a low-lying point near the midfoot portion 12, and the upper side of the forefoot portion 11 gradually rises upward from the low-lying area or the low-lying point toward the periphery of the forefoot portion 11, so that the upper side of the forefoot portion 11 forms a concave arc surface, so that the insole body 100 can provide better cushioning capacity when used, improve the comfort when wearing, and is beneficial to the development of children's feet. Preferably, the lower side of the forefoot portion 11 is provided with a rebound area, which includes at least one annular groove 111, so as to achieve shock absorption and rebound through the annular groove, thereby improving the comfort of the insole body 100. In addition, the outer periphery of the above-mentioned heel portion 13 is integrally connected with a side circumference 131 for wrapping the human foot, one end of the side circumference 131 is integrally connected with the arch portion 23, and the other end of the side circumference 131 extends to the midfoot portion 12, and the height of the side circumference 131 is 18-19 mm, preferably 18.6 mm, so as to effectively improve the wrapping of the heel portion and increase the wearing comfort; in this embodiment, the height of the side circumference 131 refers to the distance between the upper side of the side circumference 131 and the corresponding position of the lower side of the flexible support sheet 2. The upper side of the forefoot portion is provided with a depression at a position close to the midfoot portion, and the distance between the depression and the reference plane is a first distance, and the distance between the upper side of the heel portion and the reference plane is a second distance, and the difference between the first distance and the second distance is 1.5 mm-3 mm; wherein, the depression refers to the position of the upper side of the forefoot portion closest to the aforementioned reference plane.

[0043] Further, when the insole body 100 is used, the horizontal plane formed by the extension of the lower side surface is the reference plane, the spacing between the low point of the forefoot portion 11 and the reference plane is the first spacing, the spacing between the upper side surface of the rear portion (i.e., the relatively flat part) of the heel portion 13 and the reference plane is the second spacing, and the drop value between the first spacing and the second spacing is 1.5mm-3mm, for example, the first spacing is 5.5mm, the second spacing is 7.5mm, and the preferred drop value is 2mm. In addition, the height between the highest point of the arch portion 23 and the reference plane is 20mm-30mm, and the optimal height in this embodiment is 27mm, so as to assist in supporting the normal arch of the foot and play a role in supporting the arch of the foot. In this way, the front and rear drop and height setting of the insole body 100 make the foot feel close to the ground when worn, and the movement is more flexible and comfortable, and it plays a supporting role for the normal arch of the foot, which is helpful for the development of children's feet.

[0044] Further, if Figure 3a As shown Figure 3bAs shown, the arch portion 23 corresponds to the inner arch of the human body, that is, the arch portion 23 is located at the inner arch of the insole body 100, wherein a line segment perpendicular to the center line in the up-down direction is taken as a reference line, and the center line refers to a line segment from the heel to the toe of the insole body 100. In the width direction of the insole body 100, that is, on the cross section of the insole body 100, a maximum bending angle is set on the arch portion 23, and the maximum bending angle is the maximum angle between the arc line of the arch portion 23 starting from the reference line and the horizontal plane. The maximum bending angle is 2-8°. The bending angle is located in the middle of the human arch, and the arch portion 23 gradually and smoothly transitions downward to the periphery with the position of the maximum bending angle as the base point. In other words, in the cross section of the middle of the arch portion 23, the arc corresponding to the maximum bending angle is gradually curved from bottom to top along the direction close to the inside; wherein, the arc corresponding to the maximum bending angle is used as a reference, and a smooth transition is made from the reference to the surrounding areas, and the heel portion 13 and the midfoot portion 12 are respectively connected and transitioned to each other; preferably, the maximum bending angle of the arch portion 23 in this embodiment is 6°, so as to assist in supporting the normal arch and improve posture.

[0045] Furthermore, the width of the forefoot portion 11 of the insole body 100 is 79-90 mm, preferably 87.4 mm, so that the width of the forefoot portion is greater than that of a conventional insole to avoid compression of the toes, allowing the foot to move freely, ensuring the normal development of children's feet, and improving wearing comfort.

[0046] Furthermore, the upper side of the insole body 100 is provided with a skin-friendly and breathable fabric, and the skin-friendly and breathable fabric can be a common fabric on the market, such as velvet fabric.

[0047] Furthermore, the forefoot portion 11 is an arc-shaped surface that bends upward from the heel to the toe, that is, the front edge of the forefoot portion 11 is slightly bent upward relative to the reference plane so as to fit the forefoot of the human foot, ensuring that the forefoot portion 11 and the forefoot of the human foot fit each other, thereby making the human foot and the insole body 100 fit each other, thereby ensuring that when the insole body 100 is placed in the shoe, there is no gap with the edge of the shoe, thereby increasing the comfort of the insole body 100.

[0048] Furthermore, the above-mentioned flexible support sheet 2 is provided with a mounting hole (not shown in the figure) corresponding to the position of the human heel, and a shock-absorbing sheet 132 is attached to the lower side of the heel portion 13. The shock-absorbing sheet 132 is egg-shaped and arranged in the center in the width direction of the heel portion 13. The shock-absorbing sheet 132 is located in the mounting hole, wherein the shock-absorbing sheet 132 is preferably a slow rebound shock-absorbing sheet, and the Shore C hardness of the shock-absorbing sheet 132 is 30-42°, preferably the Shore C hardness is 38°; preferably, the shock-absorbing sheet 132 can be adjusted according to different degrees of arch flatness, and offset on the flexible support sheet 2, that is, when the insole body 100 is in the normal arch and high arch state, the shock-absorbing sheet 132 is arranged in the aforementioned manner to match the force conditions of different arch flatness degrees.

[0049] The insole of the present embodiment is suitable for children, teenagers and adults with normal arches. The flexible support sheet is extended to the forefoot portion, so that the support of the insole body 100 to the foot is expanded to the front side, that is, the support for the transverse arch is adjusted. Combined with the height and arc surface of the arch portion 23, the height and arc surface respectively support the inner arch of the foot, that is, the support for the inner arch is adjusted, and the bioforce line is corrected when worn, thereby adjusting the posture and promoting the development of the foot. In addition, the front and rear drop setting and the overall setting of the insole body 100 make the overall insole body 100 fit the shoe better. Compared with the conventional insole that forms an arc after flat pressing, the insole body 100 can be laid in the shoe without gaps.

[0050] Embodiment 2 like Figure 2 As shown and Figure 4-5 As shown, the difference between this embodiment and embodiment 1 is that this embodiment is suitable for children or adults with high arches, wherein the height and maximum bending angle of the arch portion 23 and the position of the arch portion 23 are adjusted respectively, as described below.

[0051] Specifically, if Figure 6a As shown Figure 6bAs shown, the arch portion 23 corresponds to the inner arch of the human body, and the insole body 100 is provided with a matching portion 25 that matches the outer arch of the human body. The matching portion 25 is provided with an arc surface, which is curved from bottom to top along the direction close to the outside; in this way, the inner arch and the outer arch of the high arch are supported respectively by the arch portion 23 and the matching portion 25. Among them, in the cross section of the arch portion 23, and at the inner arch of the insole body 100, the arc corresponding to the maximum bending angle 1 at this location in the insole body 100 is gradually bent from bottom to top in the direction close to the inner side, and the preferred maximum bending angle 1 is 6°; in the cross section of the matching portion 25, at the outer arch of the insole body 100, the arc corresponding to the maximum bending angle 2 at this location is gradually bent from bottom to top in the direction close to the outer side, and the preferred maximum bending angle 2 is 4°; wherein, at the matching portion 25, the arc corresponding to the maximum bending angle 2 is used as the base point to smoothly transition to the surrounding areas, and respectively connect and transition with the midfoot portion 12 and the heel portion 13.

[0052] Furthermore, the height from the highest point of the arched portion 23 to the reference plane is 20 mm to 30 mm, preferably 27 mm.

[0053] The present embodiment provides an insole for adjusting arch support, which is suitable for use by children, teenagers or adults with high arches. When the human arch is in a high arch state, the above structure is used to support the transverse arch, inner arch and outer arch of the human body when worn, and the high arch of the human body is adjusted in real time during wearing, thereby correcting the arch of the foot, and the bioforce line is corrected when worn to improve posture and promote foot development.

[0054] Embodiment 3 like Figure 2 As shown and Figure 7 As shown, the difference between this embodiment and the first embodiment is that this embodiment is suitable for children or adults with mild flat arches, wherein the height and the maximum bending angle of the arch portion 23 are adjusted respectively, as described below.

[0055] Specifically, if Figure 8a As shown Figure 8b As shown, in the cross section of the middle part of the arch portion 23, the arc corresponding to the maximum bending angle at this point in the insole body 100 is gradually bent from bottom to top along the direction close to the inner side, and the preferred maximum bending angle is 4°.

[0056] Furthermore, the height from the highest point of the arched portion 23 to the reference plane is 20 mm-30 mm, preferably 25 mm.

[0057] Furthermore, the above-mentioned shock-absorbing plate 132 is adjusted according to different degrees of arch flatness and offset on the flexible support plate 2. That is, when the insole body 100 is in a state of mild arch flatness, the shock-absorbing plate 132 is egg-shaped, and is offset in a direction away from the inside with the center position in the width direction of the heel 13 as a reference, and the area of ​​the shock-absorbing plate 132 becomes smaller and is smaller than the area of ​​the shock-absorbing plate 132 in Example 1 to adapt to the human foot.

[0058] The present embodiment provides an insole for adjusting arch support, which is suitable for use by children, teenagers or adults with slightly flattened arches. When the human arch is in a slightly flattened state, the above structure is used to support the transverse arch and medial arch of the human body when worn, and to adjust the slightly flattened state of the human body in real time during wearing, thereby correcting the arch of the foot, and aligning the bioforce line when worn to improve posture and promote foot development.

[0059] Embodiment 4 like Figure 2 As shown and Fig. 9 As shown, the difference between this embodiment and the first embodiment is that this embodiment is suitable for children or adults with moderately flat arches, wherein the height and the maximum bending angle of the arch portion 23 are adjusted respectively, as described in detail below.

[0060] Specifically, if Fig.10a As shown Fig.10b As shown, in the cross section of the middle part of the arched portion 23, the arc corresponding to the maximum bending angle at this location in the insole body 100 is gradually bent from bottom to top along the direction close to the inner side, and the preferred maximum bending angle is 2°.

[0061] Furthermore, the height from the highest point of the arched portion 23 to the reference plane is 20 mm-30 mm, preferably 23 mm.

[0062] Furthermore, the above-mentioned shock-absorbing plate 132 is adjusted according to different degrees of arch flatness and offset on the flexible support plate 2. That is, when the insole body 100 is in a severe arch flat state, the shock-absorbing plate 132 is egg-shaped, and is offset in a direction away from the inside with the center position in the width direction of the heel 13 as a reference. The offset distance is greater than the offset distance of the shock-absorbing plate 132 in Example 3, and the area of ​​the shock-absorbing plate 132 becomes smaller and is smaller than the area of ​​the shock-absorbing plate 132 in Example 3 to adapt to the human foot.

[0063] The present embodiment provides an insole for adjusting arch support, which is suitable for use by children, teenagers or adults with moderately flat arches. When the human arch is in a moderately flat state, the above structure is used to support the transverse arch and medial arch of the human body when worn, and the moderate flatness of the human body is adjusted in real time during the wearing process, thereby correcting the arch of the foot, and aligning the bioforce line when worn to improve posture and promote foot development.

[0064] Embodiment 5 This embodiment also provides a method for manufacturing an insole for adjusting arch support, which can be used to obtain the insole of Embodiment 1, Embodiment 2, Embodiment 3 or Embodiment 4. The specific manufacturing method is described as follows.

[0065] S1, blank molding, injecting high air permeability PU material into the first foaming mold, and performing foam molding after closing the mold to obtain a blank.

[0066] The first foaming mold in step S1 and the second foaming mold in step S3 are both conventional foaming molds, and thus will not be described in detail.

[0067] S2. Slicing the blank: cutting the blank into two halves in the horizontal direction to obtain two pieces of insole material with the same thickness. The upper sides of the two insole materials are respectively formed with a plurality of holes, and the lower sides of the two insole materials are both smooth sides. Among them, the economic cost of cutting the insole material into two pieces is the best.

[0068] S3, forming a flexible support sheet, injecting low-permeability PU material into the second foaming mold, and placing a first hot-melt film covering the cavity of the second foaming mold between the upper mold and the lower mold of the second foaming mold, and performing foaming molding after closing the mold to obtain a flexible support sheet.

[0069] Specifically, the first hot melt film is laid flat on the side of the upper mold of the second foaming mold facing the lower mold, so that the first hot melt film is naturally located between the upper mold and the lower mold of the second foaming mold after the mold is closed. In addition, the flexible support sheet has a mounting hole for accommodating the shock absorbing sheet 132, and the upper opening of the mounting hole is covered by the first hot melt film.

[0070] S4, the shock absorbing sheet is formed by punching or injection molding to obtain the shock absorbing sheet.

[0071] S4-1, fabric forming, compounding a second hot melt film on the lower surface of the skin-friendly and breathable fabric to obtain the fabric, wherein the skin-friendly and breathable fabric is a conventional knitted or non-woven fabric, which can be directly purchased from the market, and the second hot melt film is compounded on the lower surface of the skin-friendly and breathable fabric by hot pressing or gluing.

[0072] S5, hot pressing, heating the upper die of the pressing mold to 170-180°C, heating the lower die of the pressing mold to 140-150°C, preferably 146°C, and then placing the shock-absorbing sheet, flexible support sheet, insole material and fabric into the lower die of the pressing mold in sequence (that is, after the insole material is placed in the lower die of the pressing mold, the fabric is also laid on the top of the insole material), wherein the shock-absorbing sheet is passed through the mounting hole of the flexible support sheet and abuts against the first hot-melt film. After the placement is completed, the pressing mold is closed and the pressure is maintained for 140-180s. After the mold is opened, the hot-pressed semi-finished product is obtained.

[0073] It should be noted that during the process of pressing the mold, the insole material will be pressed to form the insole body and firmly connected to the shock-absorbing plate, the flexible support plate and the fabric.

[0074] S6. Hanging the material, holding the edge of the hot-pressed semi-finished product. To elaborate, the hot-pressed semi-finished product can be held by clamping it with a clip, or by opening a through hole on the scraps of the hot-pressed semi-finished product and inserting a rod into the through hole; then hang the hot-pressed semi-finished product on a drying rack for cooling to obtain a cooled semi-finished product. Preferably, the drying rack is placed in a ventilated place to improve the cooling effect. During cooling, the position of the hot-pressed semi-finished product corresponding to the forefoot of the insole is preferably arranged upwards, which helps to avoid deformation.

[0075] S7, post-processing, punching and trimming and surface printing treatment are performed on the cooled semi-finished product in sequence to obtain the insole. The specific punching and trimming method and surface printing treatment method are conventional methods, which are not the focus of this embodiment and will not be described in detail here.

[0076] Furthermore, the above-mentioned high-air permeability PU material and low-air permeability PU material are both PU materials that can be purchased directly from the market, and the high and low therein are relative and do not refer to specific air permeability levels.

[0077] Furthermore, in step S1 and step S3, the foaming molding method is to send the molded foaming mold into an oven for heating at a temperature of 35-45°C for a heating time of 5-5 minutes, so that the PU material in the mold cavity expands and fills the cavity.

[0078] Further, in step S2, in this embodiment, the example of cutting the blank into two pieces is used for explanation. The blank is cut into two pieces by a cutting machine. The cutting machine can be implemented by a conventional cutting machine. For example, the cutting machine includes a frame, a conveying roller and a cutting knife. The conveying roller is rotatably installed on the frame. The rotating structure is implemented by a conventional rotating structure, and the conveying roller is driven by a motor. The rotation can also be achieved by the cooperation of conventional transmission components such as a motor and a synchronous pulley assembly. Among them, a conveying platform is installed on the lower side of the frame corresponding to the conveying roller. The conveying platform and the conveying roller are arranged side by side, and a cutting knife is installed between the two, that is, the cutting knife is located directly below the conveying roller. The cutting knife is arranged along the axial direction of the conveying roller. In this way, the cutting knife cuts the blank during the process of the blank being conveyed by the conveying roller.

[0079] It should be noted that the above-mentioned blank can also be cut into three, four or more pieces of the same thickness, depending on the actual situation.

[0080] Furthermore, in step S5, the upper die and the lower die in the pressing mold are respectively provided with arcs matching the arc surface in the first embodiment corresponding to the position of the forefoot portion 11, so as to form the insole body 100 with the forefoot portion slightly tilted upward by hot pressing.

[0081] In the present invention, the above Figure 3a-Figure 3b , Figure 6a-Figure 6b , Figure 8a-8b as well as Figure 10a-Figure 10b All are cross-sectional views viewed from the toe toward the heel.

[0082] The above description is only a preferred embodiment of the present embodiment, and all equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. An insole for adjusting arch support, comprising an insole body, wherein the insole body is sequentially arranged from front to back as a forefoot portion, a midfoot portion and a heel portion, and a flexible support sheet is attached to the lower side surfaces of the midfoot portion and the heel portion, characterized in that: The front side of the flexible support sheet extends toward the forefoot portion to form an extension position, and the flexible support sheet is provided with a support convex portion in the area corresponding to the midfoot portion and the extension position, and the hardness of the flexible support sheet is greater than the hardness of the insole body; the flexible support sheet is provided with an arch portion that cooperates with the internal arch of a human body at the position corresponding to the midfoot portion, and the arch portion is provided with an arc surface, and the arch portion is bent and arranged along the inner direction from bottom to top, and the arch portion is provided with a maximum bending angle, and / or the flexible support sheet is provided with a matching portion that cooperates with the external arch of a human body, and the matching portion is set as an arc surface, and the matching portion is bent and arranged along the outer direction from bottom to top, and the matching portion is provided with a maximum bending angle.

2. The insole for adjusting arch support according to claim 1, characterized in that: The height of the supporting protrusion is 1.5mm-2.5mm.

3. The insole for adjusting arch support according to claim 1, characterized in that: Taking the horizontal plane formed by extending the lower side surface of the insole body as the reference plane, the upper side surface of the forefoot portion is provided with a depression near the midfoot portion, the distance between the depression and the reference plane is a first distance, the distance between the upper side surface of the heel portion and the reference plane is a second distance, and the difference between the first distance and the second distance is 1.5mm-3mm.

4. The insole for adjusting arch support according to claim 1, characterized in that: Taking the line segment perpendicular to the center line of the insole body from the heel to the toe in the up-down direction as the reference line, in the cross section of the insole body, the maximum bending angle of the arched portion relative to the horizontal plane with the reference line as the starting point is 2-8°.

5. The insole for adjusting arch support according to claim 1, characterized in that: A horizontal plane formed by extending the lower side surface of the insole body is used as a reference plane, and a height from the reference plane to the highest point of the arch portion is 20 mm-30 mm.

6. The insole for adjusting arch support according to claim 1, characterized in that: The upper side of the insole body is provided with a plurality of ventilation holes, and the air permeability of the insole body is greater than the air permeability of the flexible supporting sheet.

7. The insole for adjusting arch support according to claim 6, characterized in that: The Shore C hardness of the insole body is 25-35°, and the Shore C hardness of the flexible support sheet is 38-45°.

8. The insole for adjusting arch support according to claim 1, characterized in that: The front contour of the flexible support sheet is an arc line protruding from the middle of the front side of the flexible support sheet along the forefoot portion, and the supporting convex pad is a convex portion protruding upward from the lower side of the insole body.

9. An insole for adjusting arch support according to any one of claims 1 to 8, characterized in that: The preparation method comprises the following steps: S1, blank molding, injecting high-permeability PU material into the first foaming mold, and performing foam molding after mold closing to obtain a blank; S2, slicing the blank, cutting the blank into at least two halves along the horizontal direction to obtain at least two pieces of insole material; S3, forming a flexible support sheet, injecting a low-permeability PU material into a second foaming mold, and placing a first hot-melt film covering the cavity of the second foaming mold between an upper mold and a lower mold of the second foaming mold, and performing foaming molding after closing the mold to obtain a flexible support sheet; S4, forming the shock absorbing sheet, by punching or injection molding, to obtain the shock absorbing sheet; S5, hot pressing, heating the upper die of the pressing mold to 170-180° C., heating the lower die of the pressing mold to 140-150° C., then sequentially placing the shock absorbing sheet, the flexible supporting sheet and the insole material into the lower die of the pressing mold, and then closing the pressing mold and maintaining the pressure for 140-180 seconds, and obtaining the hot pressed semi-finished product after opening the mold; S6, hanging the material, pulling the edge of the hot-pressed semi-finished product and hanging it on a drying rack for cooling to obtain a cooled semi-finished product; S7, post-processing, sequentially performing punching, trimming and surface printing on the cooled semi-finished product to obtain an insole.

10. The insole for adjusting arch support according to claim 9, characterized in that: In step S2, the blank is cut into two pieces to obtain two pieces of the insole material, and the upper sides of the two insole materials are respectively formed with a plurality of breathable holes, and the lower sides of the two insole materials are respectively formed with smooth sides.

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