Shoes easy to put on and take off

Abstract

The invention discloses a shoe easy to put on and take off. Dynamic wrapping and rapid resetting are achieved through a closed-cell elastomer foaming material sole and a shoe heel part supporting structure which are integrally molded. The shoe heel part supporting structure comprises a U-shaped heel part, a left supporting arm and a right supporting arm. The heel part covers the area from the upper edge of the calcaneus to the lower dead center of the achilles tendon, and the height of the top end of the heel part is 10-30 mm above the upper edge of the calcaneus. The supporting arms extend forwards and downwards from the two sides of the heel part, the tail ends of the supporting arms are connected with the shoe sole at the included angle of 30-60 degrees, the thickness of the supporting arms is gradually reduced (10-15 mm to 5-9 mm) from the heel part to the shoe sole, and the width of the supporting arms is gradually increased (10-15 mm to 40-60 mm). During wearing and taking off, the foot presses downwards to drive the heel part to incline backwards and displace, and the supporting arms are bent to store energy; and after in-position, the elastic restoring force enables the heel part to reset to form dynamic wrapping. The shoe sole is provided with multidirectional staggered anti-skid grooves with the depth of 1-3mm, the lining of the heel part is made of a contractile material with the warp-wise elongation being larger than or equal to 40% and the weft-wise elongation being larger than or equal to 30% so as to tightly wrap the buffering material, and the outer surface is provided with a flexible area to avoid wrinkles and guarantee springback of the supporting arm. The design gives consideration to wearing and taking-off convenience, movement stability and durability.

Description

Technical Field

[0001] The invention relates to the technical field of footwear products, in particular to an easy-to-put-on-and-off shoe based on an integral molding technology of an elastomeric material and having a self-restoring wrapping function for a shoe back. Background Art

[0002] Patent application CN2023219043855 discloses a shoe strap and a shoe. The shoe strap comprises a strap element and a rigid heel structure element; wherein the rigid heel structure element is arranged inside the strap element, and the rigid heel structure element comprises an upper rear portion; when the shoe strap is assembled to the shoe, the upper rear portion extends from a position of the shoe corresponding to the heel to a direction of the shoe corresponding to the toe, and is inclined downwardly of the shoe; the upper rear portion has a convex curved portion, which is adapted to the shape of the heel to receive the heel; when the shoe strap is assembled to the shoe, the lower inner portion of the convex curved portion faces the shoe opening.

[0003] However, this technology requires a complex heel structural component installation process during the shoemaking process, which is labor-intensive and time-consuming, and there is much room for improvement. Summary of the invention

[0004] The purpose of the present invention is to realize the easy wearing of shoes without the help of hands by molding a sole and a shoe back support structure that is easy to implement, thereby overcoming the shortcomings of the prior art.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a pair of easy-to-put-on-and-off shoes, comprising a shoe back support structure integrally formed with the sole.

[0006] Preferably, the sole and the shoe back support structure are molded from a closed-cell elastomeric foam material, the elastic modulus of the material is 5-20 MPa and the rebound rate is ≥80%.

[0007] Preferably, the shoe rear support structure includes a heel portion, a left support arm and a right support arm.

[0008] Preferably, the rear heel portion is U-shaped and covers the area from the upper edge of the calcaneus to the lower end point of the Achilles tendon, and the top height H is 10-30 mm above the upper edge of the calcaneus.

[0009] Preferably, the two support arms extend forward and downward from both sides of the heel portion, and the ends are connected to the sole at an angle of 30-60 degrees.

[0010] Preferably, the thickness of the support arm gradually decreases from the heel to the sole, and the width gradually increases. The thickness of the support arm gradually decreases from 10-15mm at the heel connection to 5-9mm at the sole connection, and the width gradually increases from 10-15mm to 40-60mm.

[0011] Preferably, the bottom of the sole is provided with an anti-slip structure with multi-directional staggered grooves with a depth of 1-3 mm to increase the wearing stability of the shoe.

[0012] Preferably, the lining material of the shoe back has shrinkage, and its warp elongation is ≥40%, and its weft elongation is ≥30%. In addition to being able to wrap the cushioning material tightly, the lining material also needs to provide a smooth surface to facilitate the foot to slide into the shoe.

[0013] Preferably, the outer surface of the rear upper is provided with at least a portion of a flexible area to avoid wrinkles and ensure the rebound of the support arm.

[0014] When the foot is pressed down, the heel part tilts backward, the two support arms bend and deform and store elastic potential energy; after the heel is in place, the elastic restoring force of the support arm drives the heel part to return to its original position, clamping the heel to ensure stability and the heel of the shoe. Beneficial Effects

[0015] The sole and the shoe back support structure of the present invention are integrally foamed and formed by a mold, have a solid structure, and only require simple sole installation during shoemaking. The shoe back support structure is located on the outer side of the shoe back, does not require a complicated installation process, reduces manufacturing costs, and can also achieve the effect of enabling the shoe back to recover after being stepped on. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Fig. 1 is a side view of an easy-to-put-on-and-off shoe provided by an embodiment of the present invention. The solid line in the figure is a schematic diagram of the integrated structure of the sole and the shoe back support structure.

[0017] Figure 2 is a dynamic schematic diagram of the deformation of the rear support structure of an easy-to-put-on-and-off shoe after being stepped on by an embodiment of the present invention. The dotted line in the figure represents the shape of the rear support structure before deformation, and the arc arrow represents the displacement trajectory of the heel backward.

[0018] In the figure: a sole (1), a shoe back support structure (2), a heel portion (21), a support arm (22), an inner lining material (23), and a flexible area (24). DETAILED DESCRIPTION

[0019] The embodiments described in the embodiments of the present invention are only some embodiments of the present invention, not all 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.

[0020] The embodiments of the present invention are described below with reference to FIGS. 1-2 .

[0021] As shown in FIG1 , the shoe of the present invention comprises a sole (1) and a shoe upper support structure (2) formed integrally therewith by a foaming mold. According to an embodiment of the present invention, the sole (1) and the support structure (2) are made of a closed-cell elastomeric foam material (such as supercritical foamed TPU) with an elastic modulus of 5-20 MPa and a rebound rate of ≥80%, achieving a balance between high rebound and moderate rigidity.

[0022] Specifically, as shown in FIG. 1 , the heel portion (21) is U-shaped and covers the area from the upper edge of the calcaneus to the lower end point of the Achilles tendon, and the top height H is 10-30 mm above the upper edge of the calcaneus, which can avoid pinching the Achilles tendon and limit the upward movement of the calcaneus.

[0023] Specifically, the support arms extend forward and downward from both sides of the heel portion (21), and the ends are connected to the sole (1) at an angle of 30-60 degrees. The thickness of the support arms gradually decreases from 10-15 mm at the connection of the heel portion to 5-9 mm at the connection of the sole, and the width gradually increases from 10-15 mm to 40-60 mm, forming a gradient stiffness distribution and optimizing the stress transfer path.

[0024] Specifically, the bottom surface of the sole (1) is provided with multi-directional staggered grooves (including but not limited to hexagonal honeycomb patterns) with a depth of 1-3 mm, a groove width of 2-5 mm, a spacing of 8-15 mm, and a friction coefficient μ≥0.8 (GB / T 3903.6-2017 test).

[0025] Specifically, the shoe upper of the present invention is provided with a shrinkable lining material, and the lining material is made of a spandex-containing knitted fabric (such as 80% polyester + 20% spandex), with a warp elongation of ≥40% and a weft elongation of ≥30% (GB / T 3923.1-2013 test), ensuring that the lining sponge fits tightly to the foot and expands and contracts with the deformation, and at the same time, the silky surface of the material is more conducive to the heel sliding into the shoe.

[0026] According to other embodiments of the present invention, the lining material may also be 75% nylon + 25% lycra, with a warp elongation of 45%, a weft elongation of 35%, and an inner lining memory foam thickness of 5 mm.

[0027] Specifically, the shoe back of the shoe of the present invention is provided with a flexible area (24). The outer surface of the heel is partially designed to be a soft material with a Shore hardness of 40-60A, so as to avoid wrinkles caused by frequent stepping and reduce the rebound resistance of the support arm.

[0028] According to an embodiment of the present invention, when an experimenter wears shoes, the downward pressure of the foot forces the heel portion (21) to tilt backward (displacement ΔL=15-25mm), and the support arms (22a, 22b) bend and deform to store elastic potential energy (energy storage density ≥0.5J / cm³); after the heel is in place, the elastic restoring force of the support arm drives the heel portion to reset, clamping the heel, thereby ensuring stability and the heel-to-foot of the shoe.

[0029] According to an embodiment of the present invention, the molded foaming material is supercritical nitrogen foamed TPU with a density of 0.25g / cm³, an elastic modulus of 12MPa, and a rebound rate of 85%.

[0030] According to an embodiment of the present invention, the thickness of the heel connection of the support arm is 10 mm and the width is 12 mm, the thickness of the sole connection is 7 mm and the width is 50 mm, and the tapering / expanding rates are 0.5 mm / cm and 3.8 mm / cm respectively.

[0031] According to the embodiment of the present invention, the test results show that the putting on and taking off force is ≤8N (common sports shoes are ≥15N), the reset time is ≤0.3s, and the heel can be effectively clamped, making the shoes difficult to fall off.

Claims

1. A pair of easy-to-put-on-and-take-off shoes, characterized in that include: The shoe back support structure is integrally formed with the sole; The sole and the shoe back support structure are molded from a closed-cell elastomeric foam material, the elastic modulus of the material is 5-20 MPa and the rebound rate is ≥ 80%; The shoe back support structure comprises: The heel part is U-shaped and covers the area from the upper edge of the calcaneus to the lower insertion point of the Achilles tendon. The top height H is 10-30mm above the upper edge of the calcaneus. The left support arm and the right support arm extend forward and downward from both sides of the heel portion, and the ends are connected to the sole at an angle of 30-60 degrees; The thickness of the support arm gradually decreases from the heel to the sole, and the width gradually increases; When the foot is pressed down, the heel part is displaced backward, and the two support arms are bent and deformed to store elastic potential energy; after the heel is in place, the elastic restoring force of the support arm drives the heel part to return to its original position and clamp the heel.

2. The easy-to-put-on-and-take-off shoe according to claim 1, characterized in that: The bottom of the sole is provided with an anti-skid structure with multi-directional staggered grooves with a depth of 1-3 mm.

3. The easy-to-put-on-and-take-off shoe according to claim 1, characterized in that: The thickness of the support arm gradually decreases from 10-15 mm at the connection of the heel to 5-9 mm at the connection of the sole, and the width gradually increases from 10-15 mm to 40-60 mm.

4. The easy-to-put-on-and-take-off shoe according to claim 1, characterized in that: The lining material of the shoe back is shrinkable, with a warp elongation of ≥40% and a weft elongation of ≥30%.

5. The easy-to-put-on-and-take-off shoes according to claim 1, characterized in that: The outer surface of the shoe rear cover is provided with at least a portion of a flexible area.

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