KR102600435B1 - Functional insole with high cushioning function and walking assistance function and Mithod for manufacturing the same - Google Patents

Abstract

The present invention relates to a functional insole, and more specifically, to a functional insole that can support walking movements while having a high cushioning function reinforced by a cushion plate built into the insole.
A functional insole with a high cushioning function and a walking assistance function according to the present invention includes an insole body (100); and a cushion plate 200 inserted into the insole body 100.

Description

Functional insole with high cushioning function and walking assistance function and method for manufacturing the same}

The present invention relates to a functional insole, and more specifically, to a functional insole that can support walking movements while having a high cushioning function reinforced by a cushion plate built into the insole.

In general, in terms of foot health, it is best to be barefoot, but since it is difficult to live barefoot, various types of shoes have been developed for various purposes. Shoes are basically made of a structure that restricts the movement of the feet, and it is common to use an insole on the inside bottom of the shoe to protect the soles of the wearer's feet and relieve the impact of the foot when walking or standing. .

These insoles are mainly developing into the following three types of functional insoles depending on their effectiveness.

First, there is a 'protective' functional insole that aims to protect the feet and ankles by stably fixing the heel, both sides of the back of the foot, and the arch when walking or running. This also includes special orthodontic insoles to complement and correct abnormal foot structures. Second, there are 'biological' functional insoles that absorb sweat generated from the feet, remove foot odor, and suppress athlete's foot and harmful bacteria to maintain foot health and prevent discomfort (foot odor, etc.). These include things that facilitate ventilation or generate heat. Third, there is a 'cushion-type' functional insole that protects the feet and ankles by alleviating the shock received from the ground when walking or running.

However, functional insoles are not exactly classified as above, and it is common to have a complex function with one function as the main function and the other as an auxiliary function.

The present invention relates to a functional insole whose main function is 'cushion type'.

KR Publication of Patent No. 10-2006-0055724 KR Registered Patent Publication No. 10-0757773

The technical problem of the present invention is to provide a functional insole with a high cushioning function and a walking assistance function.

Another technical object of the present invention is to provide a method for manufacturing a functional insole that can prevent the generation of air bubbles during the manufacturing of the insole.

The technical problem to be achieved by the present invention is not limited to the technical problem mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

The technical problem is, the insole body 100; and a cushion plate 200 inserted into the insole body 100.

The insole body 100 is divided into a receiving portion 110 and a heel portion 120, the receiving portion 110 is an area corresponding to the arch of the foot when the insole is worn, and the receiving portion 110 is located on the inside. It is characterized by accommodating the entire cushion plate 200.

The lower surface of the receiving part 110 includes an upwardly bent arch shape, and the cushion plate 200 is located on the upper part of the lower surface of the receiving part 110 corresponding to the upwardly bent arch shape. It is characterized in that it includes an arch portion 210 located thereon.

The heel portion 120 is characterized in that a second protrusion 121 is provided.

The insole body 100 is characterized in that it is formed of a thermosetting material.

To manufacture the functional insole, the coupling hole O of the cushion plate 200 is formed into the lower mold 1200 with the upper surface of the cushion plate 200 facing the core 1110 of the upper mold 1100. ) fixing the cushion plate 200 on the fixing protrusion 1211 by inserting it into the first area 1211a of the fixing protrusion 1211 in an interference fit manner; Injecting raw materials to form the insole body 100 from the upper part of the lower mold 1200 into the inner space of the injection unit 1230 using a raw material injection device 4000; Firmly fixing the upper mold 1100 and the lower mold 1200 to maintain airtightness inside the mold 1000; and forcefully injecting the raw material injected into the inner space of the injection unit 1230 into the mold 1000 using a forced introduction device 5000.

The lower surface of the upper mold 1100 is covered with a coating member 3000, the air between the coating member 3000 and the lower mold 1100 is removed, and the coating member 3000 is firmly adhered to the upper mold 1100. It is characterized in that it further includes the step of asking.

When injecting the raw material into the injection unit 1230, the method further includes the step of introducing the Teflon rod 5200 of the forced injection device 5000 into the injection unit 1230.

According to the present invention, the insole body can have a cushioning function due to the softness of the body, and at the same time, it can have a cushioning function and a walking assistance function due to the elasticity of the cushion plate. Additionally, the cushioning function can be further improved by the softness of the insole body and the elasticity of the cushion plate.

Figure 1 is a perspective view of a functional insole according to a preferred embodiment of the present invention.
Figure 2 is a plan view of the cushion plate of Figure 1.
Figure 3 is a bottom view of the cushion plate of Figure 2.
Figure 4 is a perspective view of a mold used in manufacturing the functional insole of the present invention.
Figure 5 is a plan view of the lower mold in the mold of Figure 4.
Figure 6 is an enlarged view of the main part of the lower mold of Figure 5.
Figure 7 is a bottom view of the upper mold in the mold of Figure 4.
Figure 8 is a diagram for explaining the process of installing a coating member in a mold.
Figure 9 is a diagram for explaining the process of installing a cushion plate in a mold.
Figure 10 is a diagram for explaining the raw material injection process.
Figure 11 is a diagram for explaining the raw material forced input process.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted to make the gist of the present invention clear.

Hereinafter, for convenience of explanation, description will be made based on the insole mounted on the right foot. The explanation below may also be common to the insole installed on the left foot.

Referring to Figure 1, the insole of the present invention may include an insole body 100 and a cushion plate 200. The cushion plate 200 may be inserted into the insole body 100.

The insole body 100 may be made of thermosetting resin. Here, the thermosetting resin is a polyurethane gel with excellent shock absorption and can be formed as a soft polyurethane gel prepared by mixing isocyanate and polyol. At this time, the material of the insole body 100 is not limited to soft polyurethane gel, but may be made of a material similar to soft polyurethane gel. For example, it may be made of ethylene-vinyl acetate (EVA), silicone, polyurethane foam, or modified rubber. The insole body 100 is formed of a soft polyurethane gel, so it can absorb the shock applied to the foot while walking and distribute the load applied to the foot, and has adhesiveness on its own, so it can be used to absorb the shock applied to the foot when walking, and has adhesive properties, so it can be used to absorb the shock applied to the foot when walking. For example, it can be well attached to the sole. The entire upper surface of the insole body 100 may be coated with the coating member 300. The coating member 300 can prevent the upper surface of the adhesive insole body 100 from directly contacting the foot. The coating member 300 may be a TPU film (Thermoplastic polyurethane film). The coating member 300 may be mounted only on the upper surface of the insole body 100. That is, the coating member 300 may not be coated on the lower surface of the insole body 100. Since the lower surface of the insole body 100 is exposed as is, the insole body 100 can be stably fixed to the lower medium (eg, sole) due to the adhesiveness of the insole body 100.

The insole body 100 may be divided into a receiving portion 110 and a heel portion 120 by a first line L1. With reference to FIG. 1 , the receiving portion 110 may be located on the left side of the first line (L1), and the heel portion 120 may be located on the right side of the first line (L1). The receiving portion 110 and the heel portion 120 may be formed integrally.

The receiving portion 110 is an area corresponding to the arch of the foot when the insole is worn. The receiving portion 110 may have an arch shape that protrudes upward so as to be in close contact with the arch of the foot. The receiving portion 110 may be provided with a first protrusion 111. The first protrusion 111 may be formed in a shape that protrudes the upper surface of the accommodating part 110 located on the right end side of the accommodating part 110 upward. The first protrusion 111 may be located at a point corresponding to the left side of the metatarsal bone when the insole is worn.

The lower surface of the receiving portion 110 may include an arch shape bent upward. Also, the area of the lower surface of the receiving portion 110 corresponding to the arch shape bent upward may be located higher than the horizontal plane passing through the lower surface of the heel portion 120. That is, a space (S, hereinafter referred to as 'lower arch space') between the lower part of the lower surface of the receiving part 110 corresponding to the arch shape bent upward and the horizontal surface passing through the lower surface of the heel part 120. This can be formed.

The receiving portion 110 can accommodate the entire cushion plate 200 inside. That is, the entire surface and edge of the cushion plate 200 may be located inside the receiving portion 110.

Referring to Figures 2 and 3, the cushion plate 200 may be formed in an arch shape. The cushion plate 200 may be made of thermoplastic resin, for example, plastic.

The cushion plate 200 includes an arch portion 210, a first support portion 220, a second support portion 230, a third support portion 240, a fourth support portion 250, a first side support portion 260, and a second support portion 200. It may include a side support portion 270. The first support part 220, the second support part 230, the third support part 240, the fourth support part 250, the first side support part 260, and the second side support part 270 may be formed as one piece. .

The arch portion 210 may be formed in the central area of the cushion plate 200. The arch portion 210 may have an arch shape bent upward. The arch portion 210 may be located at the upper portion of the lower surface of the receiving portion 110 corresponding to an arch shape bent upward.

The arch portion 210 may include a first inclined portion 211 located on the left side of the centrally located second line L2 and a second inclined portion 212 located on the right side of the second line L2. The first inclined portion 211 may form a gentle slope as it moves to the left. The second inclined portion 212 may form a gentle slope while moving to the right. The first protrusion 111 seen earlier may be located on the upper part of the first inclined part 211. As a result, the load on the front part of the arch of the foot, where the load is concentrated when walking, can be cushioned to the maximum.

The first support portion 220 may be formed by extending one side of an end of the first inclined portion 211 outward from the end. When wearing the insole, the upper surface of the first support portion 220 may support the inner front part of the arch of the foot.

The second support portion 230 may be formed by extending in an outward direction on the other side of the end of the first inclined portion 211. The second support portion 230 may support the outer front portion of the arch of the foot. The first support part 220 may extend further forward than the second support part 230. Due to the structure of the foot, the arch of the foot is formed so that the inside of the foot is longer than the outside of the foot. Accordingly, the first support portion 220 may be formed to be longer forward than the second support portion 230 to support the front portion of the arch of the foot according to the shape of the arch of the foot. The ends of the first support part 220 and the second support part 230 may form a continuous, gently curved surface.

The third support portion 240 may be formed by extending in an outward direction at one end of the second inclined portion 212 . The third support portion 240 may support the inner rear portion of the foot at the arch of the foot.

The fourth support portion 250 may be formed by extending in an outward direction on the other side of the end of the second inclined portion 212. The fourth support portion 250 may support the outer rear portion of the foot at the arch of the foot.

The first side support portion 260 may be formed by extending the side portion of the area connecting the arch portion 210, the first support portion 220, and the third support portion 240 upward.

The second side support portion 270 may be formed by extending the side portion of the area connecting the arch portion 210, the second support portion 230, and the fourth support portion 250 upward.

A coupling hole O penetrating from the top to the bottom may be formed in at least one of the first support part 220, the second support part 230, the third support part 240, and the fourth support part 250. The coupling hole O is inserted into the fixing protrusion 1211 (see FIG. 6) in the cavity 1210 (see FIG. 6), which will be described later, so that the cushion plate 200 is placed in the cavity 1210 during compression molding of the insole. It can be fixed. At this time, the lower surface of the cushion plate 200 (based on FIG. 2) may be spaced apart from the upper surface of the lower mold 1200 defining the cavity 1210.

A region P forming a curved surface toward the second inclined portion 212 may be formed between the third support portion 240 and the fourth support portion 250. The area P allows the front portion of the heel to be supported only by the heel portion 120 rather than by the third support portion 240 and the fourth support portion 250.

Referring again to FIG. 1, the heel portion 120 may be provided with a second protrusion 121. The second protrusion 121 may be formed in a shape that protrudes the upper surface located at the center of the heel portion 120 upward. The second protrusion 121 may be located at a point corresponding to the center of the heel when the insole is worn.

A raised portion 130 may be formed on the edge of the insole body 100 except for the right end. The raised portion 130 may be formed in a shape that extends upward from the edge of the insole body 100 excluding the right end. The raised portion 130 may cover the heel and arch when the insole is worn.

The first protrusion 111, the second protrusion 121, and the raised portion 130 may be formed integrally with the insole body 100.

The softness of the heel portion 120 of the insole body 100 buffers the load on the heel when walking, and the cushion plate 200 absorbs the load to the lower part of the arch portion 210 and transfers the load to the first support portion 220. , the load applied to the arch (or metatarsal bone) during walking can be cushioned by distributing it to the second support part 230, the third support part 240, and the fourth support part 250. In addition, when the load applied to the cushion plate 200 is reduced, the cushion plate 200 is restored to its original state by the elasticity of the cushion plate 200 and can support walking.

Hereinafter, a manufacturing system and method for a functional insole having the above structure will be described. In order to clarify the gist of the present invention, descriptions of the previously described matters are omitted or simplified. Through the following description, the previously seen configuration may become clearer.

[Mold preparation stage]

First, the mold 1000 may be prepared. The mold 1000 may have a shape as shown in FIG. 4 . The mold 1000 may include an upper mold 1100 and a lower mold 1200. The upper mold 1100 is hinged to one side of the lower mold 1200 and can rotate up and down about the hinge axis.

Referring to FIGS. 5 and 6 , the lower mold 1200 may include a cavity 1210 corresponding to the insole molded therein. The cavity 1210 is shaped like the insole of FIG. 1 turned upside down. Hereinafter, the insole arrangement of Figure 1 is referred to as a normal arrangement. The normal arrangement may be the same as the arrangement of the insole when worn.

A fixing protrusion 1211 may be formed inside the cavity 1210. The fixing protrusion 1211 may extend directly upward from the upper surface of the lower mold 1200. The fixing protrusion 1211 may include a first area 1211a and a second area 1211b divided into upper and lower parts. The first area 1211a may be located inside the upper part of the second area 1211b. Accordingly, a step may be formed in the boundary area between the first area 1211a and the second area 1211b.

Referring to FIG. 7, a core 1110 may be formed on the upper surface of the upper mold 1100. The core 1110 protrudes toward the cavity 1210 of the lower mold 1200, and the top and side surfaces of the core 1110 may correspond to the top surface of the insole of FIG. 1.

[Coating member installation and cushion plate installation steps]

Referring to FIGS. 8 and 9 , the lower surface of the upper mold 1100 may be covered with the coating member 3000 and the coating member 3000 may be fixed to the upper mold 1100. Also, by removing the air between the coating member 3000 and the upper mold 1100 through an intake device, the coating member 3000 can be firmly adhered to the upper mold 1100.

Then, with the upper surface of the cushion plate 200 facing upward (based on normal arrangement), the coupling hole O of the cushion plate 200 is pressed into the first area 1211a of the fixing protrusion 1211. By inserting it in this way, the cushion plate 200 can be fixed on the fixing protrusion 1211. At this time, the coupling hole O may be inserted until it is caught in the step located at the boundary area between the first area 1211a and the second area 1211b. Through this structure, the lower surface (based on normal arrangement) of the cushion plate 200 can be spaced apart from the upper surface of the lower mold 1200 defining the cavity 1210.

[Raw material injection step]

Referring to FIG. 10, an injection hole 1220 penetrating the upper and lower parts may be formed in the lower mold 1200. Additionally, a raw material movement passage (not shown in the drawing) may be provided on the upper surface of the lower mold 1200 to provide a raw material movement path between the injection hole 1220 and the cavity 1210. The raw material movement passage may be in the shape of a hole or groove connecting the injection hole 1220 and the cavity 1210.

A plurality of cavities 1210 may be formed in the lower mold 1200. The plurality of cavities 1210 may be arranged symmetrically with a pair of right and left feet on the left and right with respect to the center of the lower mold 1200. The shapes of the plurality of cavities 1210 may be the same. The injection hole 1220 may be formed between the plurality of cavities 1210 in the lower mold 1200. In addition, a raw material movement passage connecting each of the plurality of cavities 1210 and the injection hole 1220 may be formed on the upper surface of the lower mold 1200. A plurality of raw material movement passages may be formed in the same shape. This structure allows multiple insoles to be manufactured uniformly at the same time.

Referring to FIG. 10, an injection portion 1230 communicating with the injection hole 1220 may be formed in the lower part of the lower mold 1200. The injection unit 1230 may be hollow. The center of the injection unit 1230 may coincide with the center of the injection hole 1120.

In the raw material injection step, the raw material to form the insole body 100 may be injected from the upper part of the lower mold 1200 into the inner space of the injection unit 1230 using a raw material injection device (not shown). At this time, the raw material injection device (not shown) discharges the raw material (soft polyurethane gel manufactured by mixing isocyanate and polyol) mixed with thermosetting resin and curing agent using a raw material supply pipe (not shown). The raw material can be injected into the inner space of the injection unit 1230. At this time, since only a preset fixed amount needs to be injected into the inner space of the injection unit 1230, there may be no need for pressure to supply raw materials above a certain level as in injection.

Here, the lower part of the injection unit 1230 is maintained with the cylinder 5100 and the Teflon rod 5200 inserted into the forced injection device 500, which will be described later. This is to prevent the raw material injected into the injection unit 1230 from leaking through the lower part of the injection port 1230.

When the coating member 3000 and the cushion plate 200 are installed and the injection of the raw materials into the injection part 1230 of the lower mold 1200 is completed, the lower mold 1200 can be covered with the upper mold 1100. . Additionally, the upper mold 1100 and the lower mold 1200 can be firmly fixed using a fixture to maintain airtightness inside the mold.

[Raw material forced input stage]

Referring to FIG. 11, a forced injection device 500 may be prepared. The forced injection device 500 may include a cylinder 5100 and a Teflon rod 5200. The Teflon rod 5200 can be moved up and down by the cylinder 5100. The horizontal cross section of the Teflon rod 5200 may have the same shape as the horizontal cross section of the inner space of the injection unit 1230.

In the forced injection step, the Teflon rod 5200 is positioned directly above the inner space of the injection unit 1230 at the bottom of the lower mold 1200, and then the Teflon rod 5200 is raised and lowered to inject the raw material into the injection unit 1230. The inside of the lower mold 1200 can be pressurized at a preset pressure. By this, the raw material can be forcibly injected into the cavity 1210. The forcing step can be completed before the raw material has hardened. Since the raw material is pressurized using a Teflon rod, the phenomenon of the raw material sticking to the Teflon rod (5200) can be prevented.

Through forced injection, raw material can fill the cavity 1210. At this time, since the lower surface of the cushion plate 200 (based on normal arrangement) is spaced apart from the upper surface of the lower mold 1200 defining the cavity 1210, the raw material surrounds the front of the cushion plate 200 and forms the insole body 100. ) can be formed.

Through the above process and system, the present invention can overcome the difficulty of injection molding by using a forced injection method when using a thermosetting resin forming the insole body 100. And, through the above process and system, it is possible to easily form a structure in which the cushion plate 200 is embedded inside the insole body 100, and the raw material is injected from the lower part of the lower mold 1200 through the injection unit 1230. By forcibly expelling the air in the cavity 1210 by injecting it through the insole, it is possible to prevent bubbles from forming inside the insole.

Although specific embodiments of the present invention have been described and shown above, it is known in the art that the present invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the present invention. This is self-evident to those who have it. Accordingly, such modifications or variations should not be understood individually from the technical idea or viewpoint of the present invention, and the modified embodiments should be regarded as falling within the scope of the claims of the present invention.

100: Insole body
110: receiving part
111: first protrusion
120: heel part
121: second protrusion
130: rising part
200: Cushion plate
210: arch part
211: first inclined portion
212: second inclined portion
220: first support portion
230: second support portion
240: third support
250: 4th support
260: first side support
270: second side support
O: joint hole
1000: mold
1100: upper mold
1110: core
1200: Lower mold
1210: Cavity
1211: fixing protrusion
1211a: first area
1211b: Second area
1220: injection hole
1230: injection part
300, 3000: Coating member
5000: Force insertion device
5100: cylinder
5200: Teflon rod

Claims (8)

An insole body (100) made of a material having softness and adhesiveness, and having a coating member (300) mounted on one side of the insole body (100); and
It includes a cushion plate 200 built into the insole body 100,
The insole body 100 is
A receiving portion 110 formed in the area corresponding to the arch of the foot when the user wears the insole, and
It is divided into a heel portion 120 formed in the area corresponding to the heel of the foot when the user wears the insole,
The entire surface and edge of the cushion plate 200 are accommodated inside the receiving portion 110,
The cushion plate 200 has a high cushioning function, characterized in that it includes a region P formed as a curved surface between the third support portion 240 and the fourth support portion 250 formed to extend toward the heel portion 120. and a functional insole with a walking assistance function. delete According to paragraph 1,
The lower surface of the receiving portion 110 includes an arch shape bent upward,
The cushion plate 200 has a high buffering function and walking assistance, characterized in that it includes an arch portion 210 located on the upper part of the lower surface of the receiving portion 110, corresponding to an arch shape bent upward. A functional insole with a function. According to paragraph 1,
A functional insole with a high cushioning function and a walking assistance function, characterized in that the heel part (120) is provided with a second protrusion (121). According to paragraph 1,
The insole body 100 is a functional insole with a high cushioning function and a walking assistance function, characterized in that it is formed of a thermosetting material. The coating member 3000 of the upper mold 1100 is fixed to the lower surface of the upper mold 1100, and the air between the upper mold 1100 and the coating member 3000 is removed through an intake device to form the coating member 3000. Firmly adhering to the upper mold 1100;
With the upper surface of the cushion plate 200 facing the upper mold 1100, the coupling hole O of the cushion plate 200 is connected to the first area 1211a of the fixing protrusion 1211 of the lower mold 1200. Fixing the cushion plate 200 on the fixing protrusion 1211 using an interference fit method;
Injecting a soft and adhesive raw material to form the insole body 100 from the upper part of the lower mold 1200 into the inner space of the injection unit 1230 using a raw material injection device 4000;
Firmly fixing the upper mold 1100 and the lower mold 1200 using a fixture to maintain airtightness inside the mold 1000; and
Forcing the raw material injected into the inner space of the injection unit 1230 into the mold 1000 using a forced injection device 5000; A method for manufacturing a functional insole with high cushioning function and walking assistance function, comprising: delete According to clause 6,
In the step of forcing the raw material injected into the inner space of the injection unit 1230 into the mold 1000, the forced injection device 5000 includes a cylinder 5100 provided below the injection unit 1230 and the injection unit. It includes a Teflon rod (5200) provided between (1230) and the cylinder (5100),
A method of manufacturing a functional insole with a high cushioning function and a walking assistance function, characterized in that when the raw material is forcibly injected, the raw material is prevented from sticking by the Teflon rod (5200) made of Teflon material.