Flexible auxiliary device for wearing shoes and manufacturing method therefor

Abstract

The present invention enables automatic wearing of a shoe through bending and restoration of a heel portion when a foot is inserted into the shoe. Provided is a flexible auxiliary device for wearing shoes, in which the device is worn on a rear portion of a shoe upper, and comprises: a flexible main body in which, from bottom to top, support portions at both sides, side portions formed at the upper portions of the respective support portions, and a heal portion connecting between the side portions are integrated as one body, and which allows the heel portion and the side portions to be bent by an input force of the foot and return to their original state; and an elastic portion installed in the main body to provide an enhanced restoring force as compared to the main body, against the bending of the rear portion of the shoe upper.

Description

Flexible shoe-wearing aid and manufacturing method thereof

[0001] The present invention relates to a flexible shoe-wearing assistive device and a method for manufacturing the same, which is an assistive device that automatically enables wearing of a shoe by inserting a foot into the shoe and restoring the heel portion to bend and straighten.

[0002] When putting on shoes, many people untie the shoelaces, put their feet in, and tie them, or spread the shoelaces open with their fingers or shoelace pieces.

[0003] Therefore, a method for quickly putting on and taking off shoes is required, and a conventional technique is disclosed in Korean Patent No. 10-2357076, "Rapid entry footwear having a rebound customization system."

[0004] According to the conventional technology, with reference to FIG. 8, a rapid entry heel structure (110) is installed on the rear axle of a shoe, and a deformable element (130) that acts as a deformable compressible and inflatable spring is combined at the base (150, bottom), and a heel member (136, 138) is connected to the end of the deformable element.

[0005] In the conventional technology, the assembly step is complicated because the deformable element (130) itself must be connected to the shoe base (150, bottom) and the heel member (136, 138) must be connected to the deformable element (130). In addition, the heel member (136, 138) moves relative to the deformable element (130), so there is a risk of breakage.

[0006] In order to solve the above problems, the present invention aims to provide a flexible shoe-wearing assistive device and a method for manufacturing the same, which can simplify the structure of an assistive device that can be automatically worn on a shoe while providing sufficient hardness to ensure durability for repeated wearing.

[0007] A flexible shoe-wearing assistive device is provided, characterized in that it includes a flexible body that is installed on the rear part of the shoe upper and is formed integrally with support parts on both sides extending upward from the bottom, side parts formed on the upper parts of each support part, and a heel part connecting the side parts, and that allows the heel part and the side part to bend downward and return to their original state by the force of the foot; and an elastic part that is installed on the body and provides a restoring force for the rear part of the upper to be stronger than that of the body.

[0008] The above elastic part is characterized in that it is a pair consisting of an inclined part located on the side of the main body and a bent part bent at both ends of the inclined part.

[0009] The above elastic part is characterized in that it is formed as an integral part with the heel part connected to both sides of the main body.

[0010] The above main body is characterized in that it is sewn and integrated with the back of the shoe upper.

[0011] The present invention provides a method for manufacturing a flexible shoe-wearing assistive device, comprising: an elastic part processing step of cutting a wire of a certain size and bending the end to manufacture an elastic part; and an insert injection step of placing the elastic part in an injection mold and injecting an injection fluid to manufacture a main body of a flexible shoe-wearing assistive device having an elastic part formed therein.

[0012] The above elastic member is characterized by being a Ni-Ti alloy composed of 30 to 50 wt% nickel and 50 to 70 wt% titanium.

[0013] The above elastic part processing step is characterized in that the cut wire is heat processed at 600°C for 1 to 10 minutes and at 300°C for 1 to 3 hours to be bent.

[0014] The above insert injection step is characterized in that the injection liquid is thermoplastic polyurethane (TPU), nylon (NYLON), or polyolefin elastomer (POE).

[0015] In the above insert injection step, the main body of the shoe-wearing flexible assistive device is installed on the back of the shoe upper by an injection mold, and is integrally formed with support portions on both sides from bottom to top, side portions formed on the upper portions of each of the support portions, and a heel portion connecting the side portions, and the elastic portion is characterized in that the elastic portion is inserted into each of the side portions or formed to connect the side portions on both sides to the heel portion, and is insert-injected.

[0016] The following effects can be expected by the above solution.

[0017] First, the flexible body that helps put the shoe on is formed as one piece of material on the heel of the upper of the shoe, so it has good formability.

[0018] Additionally, a wire-shaped elastic part is formed inside the flexible body to provide strong elasticity, maximizing the restoring force and reinforcing the internal strength of the body.

[0019] And, the metal wire elastic part inside the main body is integrated through insert injection.

[0020] Fig. 1 is a shoe-wearing flexible assistive device worn on a shoe according to an embodiment of the present invention.

[0021] Figure 2 is a perspective view of a flexible shoe-wearing assistive device according to an embodiment of the present invention.

[0022] Figure 3 is a side view of Figure 2.

[0023] Figure 4 is a diagram expressing the bending in Figure 3.

[0024] Figure 5 is a diagram showing the bending of a shoe-wearing flexible assistive device when worn on a shoe.

[0025] Fig. 6 is another example of an elastic part of a shoe wearing flexible assistive device.

[0026] Figure 7 is a photograph of the manufacturing sequence of a flexible shoe-wearing assistive device according to an embodiment of the present invention.

[0027] Figure 8 is a drawing showing a conventional patent drawing.

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. The following description and the accompanying drawings are provided to facilitate a general understanding of the present invention and are not intended to limit the technical scope of the present invention. Furthermore, detailed descriptions of well-known components and functions that may unnecessarily obscure the gist of the present invention will be omitted.

[0029] Fig. 1 is a shoe-wearing flexible assistive device worn on a shoe according to an embodiment of the present invention.

[0030] Referring to FIG. 1, the shoe-wearing flexible assisting device (20) of the present invention can be installed on the rear portion of the upper of a shoe (10) to assist automatic wearing. In addition, there is a shoe upper cover (12) and a sole (14), and the shoe-wearing flexible assisting device (20) is re-bolted and fixed to the heel portion of the upper over the sole (14).

[0031] Fig. 2 is a perspective view of a flexible shoe-wearing assistive device according to an embodiment of the present invention. Fig. 3 is a side view of Fig. 2. Fig. 4 is a diagram illustrating the bending in Fig. 3. Fig. 5 is a diagram illustrating the bending of a flexible shoe-wearing assistive device when worn on a shoe.

[0032] Referring to FIG. 2, the flexible shoe-wearing auxiliary device of the present invention is largely composed of a main body (100) and an elastic part (200).

[0033] The above main body (100) is installed on the back of the shoe upper and is integrally formed with support parts (120) on both sides from bottom to top, side parts (140) formed on the upper portion of each of the support parts (120), and a heel part (160) connecting the side parts, so that the heel part (160) and the side part (140) are bent downward by the force of the foot and then returned to their original state.

[0034] The above-described main body (100) is made of synthetic resin and is a flexible material in itself. First, the heel portion (160) of the main body (100) is formed to be rounded to fit the back of the ankle, and a side portion (140) is formed downward at a certain angle from the heel portion (160), and a support portion (120) is formed to extend from the lower portion of the side portion (140) and protrude by bending inward.

[0035] The elastic member (200) is built into the main body (100) and is installed on the side portion (140) to provide a restoring force against bending of the side portion (140) that is stronger than that of the main body. Here, both ends of the elastic member (200) are bent downward at a certain angle and are positioned on the support portion (120) and the heel portion (160), respectively, to provide elastic force against downward pressure. In addition, the support portion (120) is fixed to the shoe by being sewn with the upper.

[0036] The above elastic part (200) can be formed in a form in which the side part (140) and the heel part (160) are connected as a whole, and this is illustrated in FIG. 6.

[0037] The above elastic part (200) is formed in a wire shape.

[0038] Meanwhile, the present invention is characterized in that the elastic part (200) is insert-molded into the main body (100), so that the outer body (100) is made of synthetic resin, and has a neat appearance with wires inserted inside, and has the advantage of being integral and requiring no separate assembly. The main body (100) is formed in a plate shape with a thin thickness, and it is preferable to make it flexible by making the thickness about 2 to 5 mm.

[0039] In addition, the main body (100) is formed in a plate shape and can be easily sewn to the back of the shoe upper to become integrated with the upper. The main body (100) can be sewn anywhere on the inside, inner side, or outer side of the upper.

[0040] Referring to FIGS. 3 to 5, as shown in FIGS. 4 and 5, the body (100) of the present invention is bent as a whole to become flexible, and the elastic part (200) inside has higher elasticity than the body (100) and provides a strong force for restoration.

[0041] Figure 7 is a photograph of the manufacturing sequence of a flexible shoe-wearing assistive device according to an embodiment of the present invention.

[0042] Referring to Fig. 7, in 7(a), a wire (220) of a certain size is cut. Then, in 6(b), the wire is put into a metal frame and the end is bent through forging to manufacture an elastic part. In 7(c), elastic parts of various shapes can be manufactured. From the top, the elastic part can be manufactured as an elastic part (200-1) composed of an inclined part located on the side of the main body and a bent part bent at both ends of the inclined part, an elastic part (200-2) that can be bent by having one end thin and the other end wide, and an elastic part (200-3) that is formed in an integral shape with heels connected to both side surfaces of the main body.

[0043] At this time, the elastic member (200) is characterized by being a Ni-Ti alloy composed of 30 to 50 wt% nickel and 50 to 70 wt% titanium. Since it is difficult to maintain elasticity with only titanium, nickel is separately mixed in to provide elasticity.

[0044] In addition, the elastic portion processing step is characterized in that the cut wire is subjected to bending processing by heat processing at 600°C for 1 to 10 minutes and at 300°C for 1 to 3 hours.

[0045] In 7(d), an elastic part (200) is placed in an injection mold (300) and an injection liquid is injected to manufacture a main body (100) of a flexible assistive device for wearing shoes, in which an elastic part is formed inside, as in 7(e) and 7(f).

[0046] The above insert injection step is characterized in that the injection fluid is thermoplastic polyurethane (TPU). The polyurethane (TPU) is injected into the injection mold at a temperature of approximately 200°C for 50 to 70 seconds.

[0047] In the above insert injection step, the main body of the shoe-wearing flexible auxiliary device is installed on the back of the shoe upper by an injection mold, and is integrally formed with support parts (120) on both sides from bottom to top, side parts (140) formed on the upper portion of each of the support parts (120), and a heel part (160) connecting the side parts (140), and the elastic part is characterized in that the elastic part is inserted into each of the side parts or formed to connect the side parts on both sides to the heel part is insert-injected.

[0048] Here, the lower part of the support part (120) can be fixed to the shoe by being sewn to the upper of the shoe. By doing so, it can be fixed more firmly than when fixed to the conventional base (floor).

[0049] As described above, it can be seen that the present invention is based on the basic technical idea of ​​a flexible shoe-wearing assistive device. It is obvious that many other modifications are possible for those skilled in the art within the scope of the basic idea of ​​the present invention.

Claims

1. A flexible body that is installed on the back of the shoe upper and is formed integrally with a support portion on both sides from bottom to top, a side portion formed on the upper portion of each of the support portions, and a heel portion connecting the side portions, and that bends downward and returns to its original state by the force of the foot; An elastic member installed on the main body and providing a stronger restoring force to the rear part of the upper than the main body; A flexible shoe-wearing aid characterized by including:

2. In paragraph 1, The above elastic part, A flexible shoe-wearing assistive device characterized in that it comprises a pair of inclined portions located on the side of the main body and bent portions bent at both ends of the inclined portions.

3. In paragraph 1, The above elastic part, A flexible shoe-wearing assistive device characterized in that the heel portion is formed as an integral part connected to both sides of the main body.

4. In paragraph 1, The above body, A flexible shoe-wearing aid characterized by being sewn and integrated into the back of the shoe upper.

5. Elastic part processing step of cutting into wire of a certain size and bending the end to manufacture an elastic part; A method for manufacturing a flexible shoe-wearing assistive device, characterized by comprising an insert injection step of manufacturing a main body of a flexible shoe-wearing assistive device having an elastic part formed inside by placing the elastic part in an injection mold and injecting an injection fluid.

6. In paragraph 5, The above elastic part, A method for manufacturing a flexible shoe-wearing assistive device, characterized in that the shoe is a Ni-Ti alloy composed of 30 to 50 wt% nickel and 50 to 70 wt% titanium.

7. In paragraph 5, The above elastic part processing step is: A method for manufacturing a flexible shoe-wearing assistive device, characterized in that the cut wire is heat-processed at 600°C for 1 to 10 minutes and at 300°C for 1 to 3 hours to be bent.

8. In paragraph 5, The above insert injection step is, A method for manufacturing a flexible shoe-wearing assistive device, characterized in that the above-mentioned injection fluid is thermoplastic polyurethane (TPU), nylon (NYLON), or polyolefin elastomer (POE).

9. In paragraph 5, In the above insert injection step, A method for manufacturing a flexible shoe-wearing assistive device, wherein the main body of the flexible shoe-wearing assistive device is installed on the back of the shoe upper by an injection mold, and is integrally formed with support portions on both sides from bottom to top, side portions formed at the upper portions of each of the support portions, and a heel portion connecting the side portions, and wherein the elastic portions are inserted into each of the side portions or the elastic portions formed to connect the side portions and the heel portions on both sides are insert-molded.

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