KR102607388B1 - Manufacturing method of insole equipped with plantar muscle strengthening pad for active correction of arch during walking and improvement of body pressure denter movement trajectory - Google Patents

Abstract

The present invention relates to a method of forming an insole equipped with a sole muscle strengthening pad for active arch correction and improvement of body pressure center movement trajectory during walking.
This invention consists of a cushion material and a protective member surrounding the outside of the cushion material, including an arch support portion supporting the arch portion, a forefoot support portion formed in front of the arch support portion to support the forefoot portion, and an arch support portion and a forefoot support portion. A first step of manufacturing a sole muscle strengthening pad formed including a connecting passage connecting the two; A second step of mounting a cover member on the upper mold, placing a sole muscle strengthening pad on the bottom of the cavity having a shape corresponding to the foot shape of the lower mold, and placing a heel guard on the rear side of the cavity; The technical gist includes a third step of molding the upper mold and the lower mold, injecting the resin material into the cavity, and then applying heat to integrate the resin material and the cover member to form the insole with the sole muscle strengthening pad inserted. do.

Description

Method of forming an insole equipped with a pad to strengthen the sole muscles for active correction of the arch and improvement of the movement trajectory of the body's center of pressure during walking }

The present invention relates to a method of forming an insole equipped with a sole muscle strengthening pad for active arch correction and improvement of body pressure center movement trajectory during walking.

Foot stability affects human upright posture and postural stability. If your feet are unstable, it can cause musculoskeletal diseases such as plantar fasciitis, Achilles tendonitis, ankle sprain, restricted functional movement of the big toe, anterior cruciate ligament damage, or back pain. To prevent these diseases, exercise to strengthen the sole muscles is performed. It is being demanded.

Human feet and legs have functional connections. In other words, the musculoskeletal complex, including the pelvis, knees, ankles, and feet, is connected to each other, and the stability of the foot is transmitted to the pelvis. Therefore, when you suddenly walk or exercise after sitting for a long time, the calf muscles or sole muscles that have lost elasticity receive excessive load and become inflamed. This can cause pain. If you sit for a long time, the large muscles of the lower extremities, such as the buttocks and hamstring muscles, become weak. If you walk or exercise in this condition, the smaller calf muscles or sole muscles are used, causing muscle stiffness and excessive contraction, which can cause pain. .

Meanwhile, the intrinsic foot muscles provide basic stabilizing functions for various factors in the foot and ankle joints, along with local stabilizing functions inside the foot and dynamic support and control functions, that is, they respond to various surfaces and environments and maintain the structural stability of the foot. It is an important part that is responsible for the function of optimizing changes in close contact with the ground to ensure stable grounding, and the function of controlling the amount and timing of muscle activation during foot movement to respond appropriately to the situation and environment.

In particular, the foot's 1st ray, which is aligned between the big toe (Hallux) and the heel, is an important element in the dynamic kinematic mechanism of foot movement. In relation to this, Figure 1a shows an example of the foot's 1st ray, and Figure 1b shows an example of the change in the center of the foot when the heel is lifted.

Referring to Figure 1a, when a stable alignment of the foot is maintained, the first line of the foot exerts the structural force of the internal musculature of the foot due to the pressure caused by the body weight on the foot, forming the arch of the foot, immediately improving the stability of the foot and ankle supporting the human body. It serves as an important body alignment structure in maintaining a stable posture and controlling dynamic and variable movements by promoting the balance ability of the entire human body according to the force chain effect. In the first line structure of the foot, the part of the sole just below the big toe is the 1st toe metatarsal bone head, and this part becomes the reference point for aligning the first line structure of the foot. When the sensation and strength of the toe contacting the surface of the lumbar spine of the big toe improves, the arch of the foot is stably formed, the intrinsic muscles of the foot are activated, and the function of supporting the entire body of the foot is significantly improved.

Referring to Figure 1b, at the moment of lifting the heel while walking, the skeletal structure of the central part of the foot is lowered in the direction of gravity, and the first line of the foot rises relatively and moves forward due to body weight pressure, and when it reaches the front part of the sole, the It is the head of the lumbar spine that receives the pressure and converts it into propulsion.

In the 'walking guide insole (registration number: 10-1711333)' using Figures 1a and 1b, the sole of the foot is grounded in the direction of weight transfer when the wearer walks, and the heel is not deflected in either the inner or outer direction. An insole has been proposed to encourage this. However, since the insole has many components such as a bottom member, cushion member, walking guide member, arch support member, heel guide protrusion member, heel cushion plate, heel detection unit, control unit, and walking guide terminal, the actual insole must be of stable and uniform quality. There have been difficulties in molding it to have this shape.

In addition, in the 'Multifunctional Shoe Insole (Registration Number: 10-0352209)', the upper sole with a rubber membrane glued to the rear is glued to the lower sole with a guard that blocks the nipple hole and the rubber membrane, and then the top of the detachable air bag is inserted into the nipple hole. A shoe insole inserted into a shoe is being launched. However, with the method of inserting the tip of the air bladder into the nipple hole of the lower sole, the air bladder can be expected to escape from the nipple hole while walking, making it difficult to actively correct the arch, and there are limitations in improving the movement trajectory based on body pressure. there is.

Therefore, there is an urgent need for new technology development research that can not only actively correct the arch of the foot while walking by placing a pad that strengthens the muscles of the sole at the optimal position of the insole, but also improve the movement trajectory based on the center of body pressure. There is a situation.

Domestic Patent Publication No. 10-1711333, registered on February 22, 2017. Domestic Patent Publication No. 10-0352209, registered on August 28, 2002.

The present invention was invented to solve the above problems, and provides a method of forming an insole that can actively correct the arch and improve the movement trajectory of the center of body pressure during walking by placing the sole muscle strengthening pad at the optimal position of the insole. Providing technical solutions is a task.

In order to solve the above technical problem, the method of forming an insole equipped with a sole muscle strengthening pad for active correction of the arch during walking and improvement of the movement trajectory of the center of body pressure during walking according to an embodiment of the present invention includes a cushion material and a material surrounding the outside of the cushion material. It is made of a protective member, and includes an arch support portion supporting the arch portion, a forefoot support portion formed in front of the arch support portion to support the forefoot portion, and a connection passage portion connecting the arch support portion and the forefoot support portion. The first step of manufacturing a sole muscle strengthening pad; A second step of mounting a cover member on the upper mold, placing the sole muscle strengthening pad on the bottom of a cavity having a shape corresponding to the foot shape of the lower mold, and placing a heel guard on the rear side of the cavity; and a third step of molding the upper mold and the lower mold, injecting a resin material into the cavity, and then applying heat to integrate the resin material and the cover member to form an insole into which the sole muscle strengthening pad is inserted. In the second step, a first region, a second region, a third region, and a fourth region are formed in the cavity in a clockwise or counterclockwise direction from a point adjacent to the big toe based on the center of the forefoot and arch portion of the foot. Divided into four equal parts, and divided into a first section, a second section, and a third section at a ratio of 0.4 to 0.6: 5.5 to 6.5: 3 to 4 from the point where the big toe is adjacent based on the width direction of the cavity, The forefoot support is disposed in the second section between the first area and the second area, and the forefoot support is formed to have a width corresponding to the second section and is disposed corresponding to the forefoot of the foot in the second step. and is disposed on one side toward the big toe from the width direction center of the cavity, and the arch support portion is formed to have a width within the second section and is disposed corresponding to the arch portion of the foot in the second step, but is located at the width direction center of the cavity. The insole is disposed lateralized toward the big toe side, and the insole is inserted so that the sole muscle strengthening pad is lateralized toward the big toe side from the center of the width direction of the foot as a whole.
In addition, the edge of the sole muscle strengthening pad is characterized in that a plurality of penetration holes penetrating upward and downward are formed.
In addition, the insole is continuously produced while the upper mold and the lower mold are provided in multiple pieces and are transported by a conveyor belt preheated to 60 to 70° C., and the upper mold and the lower mold are formed by the preheated conveyor belt. The mold is maintained at 50 to 55°C.
And, the third step is characterized by molding for 5 to 10 minutes and then curing at room temperature for 5 to 15 minutes.

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According to the present invention as a means of solving the above problem, a cover member is mounted on the upper mold, a sole muscle strengthening pad and a heel guard are placed in the cavity of the lower mold, and then a resin material is injected into the cavity and thermoformed and cured. As the resin material becomes the bottom member and is integrated with the cover member, it is possible to easily form an insole in which the 'U' shaped heel guard is stably combined with the sole muscle strengthening pad inserted.

When walking in shoes equipped with an insole molded in this way, damage to the intrinsic muscles can be minimized by ensuring that the point where the forefoot and the first metatarsal are connected with respect to the big toe, that is, the head of the toe lumbar bone, is in good contact with the ground. By strengthening intrinsic muscle activation, it lifts the big toe and facilitates the formation of the inner arch of the foot, thereby improving the stability of the internal foot structure, thereby correcting deformed feet due to hallux valgus, etc. into a desirable form. There is an effect that can be done.

Figure 1(a) is an example diagram showing the appearance of the foot's 1st ray, and Figure 1(b) is an example diagram showing the change in the center of the foot when the heel is lifted.
Figure 2 is a process diagram showing a method of forming an insole equipped with a sole muscle strengthening pad according to the present invention.
Figure 3 is an example diagram showing the direction of weight movement on the sole of the foot when walking.
Figure 4 is an example diagram showing a disease that can occur when the intrinsic muscles of the toe are not activated.
Figure 5 is a perspective view showing the sole muscle strengthening pad according to the present invention.
Figure 6 is a layout diagram showing the arrangement of the sole muscle strengthening pad according to the present invention.
Figure 7 is a perspective view showing an insole with a sole muscle strengthening pad inserted and installed according to the present invention.
Figure 8 is an exploded perspective view showing the exploded appearance of Figure 7.
Figure 9 is a bottom view showing the bottom of Figure 7.
Figure 10 is a side view showing the side of Figure 7.
Figure 11 is an example diagram showing the effect of the insole molded by the method according to the present invention.

Hereinafter, the present invention will be described in detail.

The present invention relates to a method of forming an insole (10) equipped with a sole muscle strengthening pad (100) for active arch correction and improvement of body pressure center movement trajectory during walking. In relation to this, Figure 2 shows a process diagram of a method of forming an insole 10 equipped with a sole muscle strengthening pad 100 according to the present invention. As shown in Figure 2, the method of forming the insole 10 provided with the sole muscle strengthening pad 100 is to form the sole muscle consisting of a cushion material 100b and a protective member 100a surrounding the outside of the cushion material 100b. The first step (S10) of manufacturing the reinforced pad 100, the cover member 12 is mounted on the upper mold 1, and the bottom of the cavity 2a has a shape corresponding to the shape of the sole of the lower mold 2. A second step (S20) of placing the sole muscle strengthening pad 100 on the rear side of the cavity 2a and placing the heel guard 15 on the rear side of the cavity 2a, and injecting a resin material into the cavity 2a and then applying heat. It includes a third step (S30) of molding the insole 10 into which the sole muscle strengthening pad 100 is inserted while the resin material and the cover member 12 are integrated.

According to the above-described molding method, the first step consists of a cushion material (100b), a protection member (100a) surrounding the outside of the cushion material (100b), an arch support portion (110) supporting the arch portion, and an arch support portion. The sole muscle is formed including a forefoot support portion 120 formed in front of 110 to support the forefoot, and a connection passage portion 130 connecting the arch support portion 110 and the forefoot support portion 120. This is the step of manufacturing the reinforced pad 100 (S10).

Prior to explanation, it is ideal to distribute the body weight from the heel through the outside of the sole and the forefoot in the direction of the big toe, as shown by the arrows A → B → C shown in Figure 3, which illustrates the direction of weight movement on the sole of the foot when walking. However, if the stability of the foot's contact with the floor from the outside to the inside is not adjusted, the foot becomes unstable, causing pelvic misalignment and abnormal structural deformation. Ultimately, the lack of foot stability soon causes pain and damage to the entire leg. do.

The resulting diseases include plantar fascilitis, functional movement limitation of the big toe (Functional hallux limitus-rididus), Achilles tendinitis, chronic ankle instability-ankle sprain, There is anterior cruciate ligament injury (ACL injury) and low back pain. In addition, as shown in Figure 4, which illustrates diseases that can occur when the intrinsic muscles of the toes are not activated, if the intrinsic muscles of the toes are not properly activated, Achilles tendonitis, posterior tibial tendinitis, plantar fasciitis, and blisters may occur. (Blisters) and toenail bruising may occur.

To prevent this, this step strengthens the intrinsic muscle movement of the foot while walking and guides the path of weight transfer ideally, which not only helps treat flat feet, plantar fasciitis, and hallux valgus, but also corrects the condition to a desirable gait. A sole muscle strengthening pad (100) is manufactured to be inserted and installed between the bottom member (11) and the cover member (12) forming the insole (10).

Figure 5 shows a perspective view of the sole muscle strengthening pad 100 according to the present invention. Referring to FIG. 5, the sole muscle strengthening pad 100 can be manufactured by inserting a protective member 100a forming the outer shape and a soft cushioning material 100b inside the protective member 100a, and the cushioning material 100b An example would be polyurethane foam made of thermoplastic poly urethan (TPU). The cushioning material 100b inserted into the protective member 100a can provide a cushioning effect and a cushioning feeling to the insole 10 when it touches the ground while walking. In some cases, the inside of the protective member 100a of the sole muscle strengthening pad 100 may be filled with nitrogen instead of the cushioning material 100b such as polyurethane foam.

The sole muscle strengthening pad 100 includes an arch support portion 110, a forefoot support portion 120, and a connection passage portion 130. When a load is applied to the rearfoot during walking, the body weight passes through the outside of the sole to the forefoot. As it moves, the metatarsal bone is stimulated by contact with the forefoot support portion 120, and the vector is changed in the direction between the big toe and the index toe to generate a driving force, thereby correcting the gait.

The arch support portion 110 is configured to support the arch portion. The arch support portion 110 is disposed inside the insole 10 so as to be in a position corresponding to the arch of the wearer, and includes a first arch line 111 extending along the inner line of the sole of the foot, and a first arch line 111. ) is formed to be rounded outward as it moves forward from the end of the foot, activating the intrinsic muscles of the foot when walking and helping to form the arch.

The forefoot support unit 120 is formed in front of the arch support unit 110 to support the forefoot. The forefoot support portion 120 may be connected to the arch support portion 110 by a connection passage portion 130. This forefoot support portion 120 includes a first forefoot support line 121 extending from the first connection line 131 of the connection passage 130, and a bent portion formed at the end of the first forefoot support line 121. The second forefoot support line 122, the third forefoot support line 123 bent again at the end of the second forefoot support line 122, and the third forefoot support line 123 bent inward at the end of the third forefoot support line 123. It may be composed of a fourth forefoot support line 124 connected to the second connection line 132 of the connection passage portion 130.

The connection passage portion 130 is configured to connect the arch support portion 110 and the forefoot support portion 120. In detail, an arch support 110 is formed at one end of the connection passage 130, and a forefoot support 120 is formed at the other end of the connection passage 130. In more detail, the connection passage portion 130 includes a first connection line 131 extending from the first arch line 111 of the arch support portion 110, and a second arch line 112 of the arch support portion 110. It consists of a second connection line 132 extending from ), enabling movement of elastic force between the arch support portion 110 and the forefoot support portion 120.

Referring to Figure 5, when walking, the body weight moves from the sole and reaches the boundary point (P) corresponding to the corner between the third forefoot support line 123 and the fourth forefoot support line 124, in the direction of the big toe, Alternatively, the vector changes in the direction between the big toe and the index toe, lifting the big toe to gain momentum. If the vector of weight transfer during walking from the heel to the outside of the foot toward the big toe does not change, ankle sprains or falls may occur due to damage to the ligaments that support the ankle joint when the ankle is severely twisted or twisted. It is brought about. Accordingly, among foot intrinsic muscle exercises, exercise or force control that moves the muscles is more important than strengthening the muscle strength of the foot intrinsic muscles, so that the sole muscle strengthening pad 100 manufactured in this step can serve as a point marker that serves as a stimulation point. It will happen.

For reference, the sole muscle strengthening pad 100 is preferably manufactured to a thickness of 1.0 to 1.5 mm and has a weight of 60 to 65 g. If the sole muscle strengthening pad (100) is less than 1.0 mm, when the wearer walks, a load is applied to the rear foot, and then the body weight is transferred to the forefoot through the outside of the sole, and even if the metatarsal bone touches the forefoot support unit (120), it does not receive stimulation, so the thumb It cannot generate propulsive force in the direction between the toe and index toe, and if the thickness exceeds 1.5 mm, it is too thick and may interfere with walking due to a feeling of heterogeneity when walking. If the sole muscle strengthening pad 100 is less than 60g, it may not function to help correct walking, and if it exceeds 65g, the insole may become too heavy, causing discomfort in walking.

Next, in the second step, the cover member 12 is mounted on the upper mold 1, and the sole muscle strengthening pad 100 is installed on the bottom of the cavity 2a, which has a shape corresponding to the sole shape of the lower mold 2. This is the step of placing the heel guard 15 on the rear side of the cavity 2a (S20).

To manufacture the insole 10 in which the bottom member 11, the cover member 12, the heel guard 15, and the sole muscle strengthening pad 100 are integrated, an upper mold 1 and a lower mold 2 are prepared. A pin (not shown) to which the sole muscle strengthening pad 100 can be fixed may be installed on the bottom of the cavity (2a) of the lower mold (2). The pin is installed at a height of 1.5 to 2.5 mm from the bottom of the cavity (2a). It may protrude. If the height of the pin is less than 1.5 mm, it is difficult to completely fix the plantar muscle strengthening pad 100, and the plantar muscle strengthening pad 100 is easily separated from the pin when the resin material is injected into the cavity 2a. On the other hand, if the height of the pin exceeds 2.5 mm, there is a disadvantage that it is not easy to fit the upper mold (1) and the lower mold (2).

It is preheated to 60 to 70°C on a moving conveyor belt (not shown), and the upper mold (1) and lower mold (2), which are provided in multiple numbers, are maintained at a temperature of 40 to 55°C or higher by the preheating conveyor belt. It can be. While the temperature is maintained at 40°C or higher, the heel guard 15 can be inserted into the rear side of the cavity 2a, and the bottom member 11 and the heel guard 15 are formed by thermoforming without adhesive at 40 to 55°C. Combination can take place.

The upper mold (1) is equipped with a cover member (12) that is combined with the bottom member (11) and contacts the sole of the foot. The cover member (12) is made of a flexible fabric material (e.g., polyester) that can be used as a top sheet. Since this can be achieved, it is suitably combined with the shape of the curved and rounded floor member 11 after thermoforming. In the case of the cover member 12, it can be inserted when the conductive heat provided by the conveyor belt is maintained without separately preheating the upper mold 1.

Figure 6 is a layout diagram showing the arrangement of the sole muscle strengthening pad 100 according to the present invention. Figure 6(a) shows a top view of the sole muscle strengthening pad 100 manufactured in the first step, and Figure 6(b) shows a cavity having a shape corresponding to the shape of the sole in the lower mold 2 ( In 2a), the sole corresponding to the cavity 2a is shown.

The third area (A3) is an area that transmits pressure to the human body in the initial stance phase at the moment the heel touches the ground while walking, and in the case of the fourth area (A4), the pressure generated in the third area (A3) causes heel bone rotation. This is the inner part of the heel where the pressure is momentarily distributed and the part where the arch of the foot is formed. At the same time, it reverses the physical force of the heel bone rotating from the outside to the inside, diagonally in the direction of the third area (A3) and the second area (A2). This is an area that moves pressure upward. The second area (A2) is one of the parts that maximizes the pressure transferred from the heel area of the third area (A3) and the fourth area (A4). As a result, the pressure does not move to the little toe when walking, and the pressure is not transferred to the waist of the foot. This is an area that supports the body weight as much as possible near the bone, reverses the generated kinetic energy, and moves the pressure to the first area. In the case of the first area (A1), it is a key part where the sole muscle strengthening pad 100 is placed, and when walking, the pressure transfer from the second area (A2) is absorbed and a repulsion force is generated to generate a driving force for taking a step. This is the area that creates the movement of force to propel forward movement between the big toe and index toe during walking.

Referring to FIGS. 6(a) and 6(b), in the cavity 2a, the first area A1 and the second area are formed clockwise or counterclockwise from the point where the big toe is adjacent to the center of the forefoot and arch of the foot. It is divided into four parts: area A2, third area A3, and fourth area A4, and is 0.4 to 0.6: 5.5 to 6.5: 3 to 3 from the point adjacent to the big toe based on the width direction of the cavity (2a). Divided into the first section (S1), the second section (S2), and the third section (S3) at a ratio of 4, and in the second section (S2) between the first area (A1) and the second area (A2) It is desirable to arrange the forefoot support portion 120 of the sole muscle strengthening pad 100.

In particular, the forefoot support portion 120 of the sole muscle strengthening pad 100 is located in the second section S2 between the first region A1 and the second region A2 of FIG. 6, which is pressed by the area that becomes the sole of the foot below the big toe. ) is placed, and can be an important point in distributing air pressure and moving it to the center of body pressure.

A line extending horizontally from the center point of the forefoot support portion 120 of the sole muscle strengthening pad 100 (ℓ1 in FIG. 6) and the widest width among the left and right widths in the cavity 2a corresponding to the shape of the foot. The vertical axis position of the sole muscle strengthening pad 100 can be determined by arranging it to coincide with a line connecting the vertices of both ends at the inner point (U in FIG. 6).

On the line connecting the vertices of both ends at the widest position among the left and right widths of the cavity (2a), the insole for the left foot (10) has a ratio of 0.4 to 0.6:5.5 to 6.5:3 to 4 for the insole for the right foot (10). ) In the case of 3 to 4 : 5.5 to 6.5 : 0.4 to 0.6, the horizontal axis on which the plantar muscle strengthening pad 100 is placed in the area corresponding to the 5.5 to 6.5 ratio can be determined. It is preferable that the cavity 2a is divided at a ratio of 0.4 to 0.6:5.5 to 6.5:3 to 4 along a line connecting the vertices of both ends at the widest position among the left and right widths.

At this time, it is desirable to bring both ends of the first forefoot support line 121 and the third forefoot support line 123 of the forefoot support unit 120 into contact with both ends of the second section S2 of the cavity 2a. In the case of the fourth forefoot support line 124, it is placed in the area between the boundary line of the first area (A1) and the fourth area (A4) and point U in Figure 6 (see ℓ1 in Figure 6), and the second In the case of the forefoot support line 122, it is desirable to place it in an area between the boundary point between the big toe and the forefoot and point U in FIG. 6.

Finally, the third step is to inject the resin material into the cavity (2a) and then apply heat to integrate the resin material and the cover member (12) to form the insole (10) into which the sole muscle strengthening pad (100) is inserted. It is (S30).

The resin material and the heel guard (15) must be above 40°C for mutual adhesion. To this end, heat is conducted to the upper mold (1) and lower mold (2) by a conveyor belt that is preheated to 60 to 70°C, forming the upper mold (1) and the heel guard (15). The mold (1) and the lower mold (2) themselves are maintained at a temperature of 40 to 55°C, and the resin material is injected into the cavity (2a), thermoformed for 5 to 10 minutes, and then cured for 5 to 15 minutes to form the bottom member. After the inspection of (11), the insole 10 can be separated from the cavity 2a and cut.

If thermoforming is performed for less than 5 minutes, it is not enough time for the resin material to be molded into the shape of the bottom member 11, and if it exceeds 10 minutes, a burning phenomenon may appear on the bottom member 11 as heat is provided for a long time. This is not desirable. If cured for less than 5 minutes after thermoforming, it is not enough time to stabilize the strength of the insole (10), and if cured for more than 15 minutes, excellent effects are not achieved compared to when cured for less than that, thereby improving productivity. There is no need to cure for more than 15 minutes on the sides. Most preferably, the insole 10 can be manufactured in about 15 minutes by thermoforming for 7 minutes and then curing for 8 minutes.

The resin material injected into the cavity (2a) connected to the cavity (2a) can be ether polyurethane (EPU) with a specific gravity of 0.28 to 0.32. In this case, according to the formula of volume × specific gravity = weight, 10 × 0.28 to 0.32 = can be molded into a floor member 11 having a weight of 28 to 32 g. If the specific gravity of the resin material is less than 0.28, it cannot be molded into the bottom member 11 of the insole 10, resulting in defects. If it exceeds 0.32, there is a disadvantage in that the wearing comfort of the insole 10 is not good. However, it is not limited as long as it is a resin material that can self-adhere to the bottom member 11 of the insole 10 without adhesive.

The insole 10 formed by the above-described method can be confirmed through FIGS. 7 to 10. Figure 7 is a perspective view showing the insole 10 into which the sole muscle strengthening pad 100 according to the present invention is installed, Figure 8 is an exploded perspective view showing the exploded view of Figure 7, and Figure 9 is the bottom of Figure 7. is shown in a bottom view, and Figure 10 shows the side of Figure 7 in a side view.

The hardness of the floor member 11 corresponding to the main body is preferably 31 to 38, and the hardness of the heel guard 15 is preferably 55 to 60. If the hardness of the bottom member 11 is less than 31, it is difficult to stably support the wearer's feet and durability is reduced. On the other hand, if the hardness is more than 38, it is too hard and the wearer's wearing comfort is deteriorated. If the hardness of the heel guard 15 is less than 55, the heel of the sole member 11 sags as the heel is pressed against the heel part of the insole 10. If the hardness is more than 60, a foreign body sensation occurs in the heel when walking. It is undesirable because it can be felt. In the case of the heel guard 15, the weight may be 8 to 12 g, preferably 10 g, and may account for about 1/10 of the total weight of the insole 10.

Also, referring to FIGS. 7 to 9, among the bottom members 11 constituting the insole 10 formed by the above-described method, an upwardly rounded arch support portion 13 is formed to protrude at a position corresponding to the wearer's arch portion. It can be. That is, the arch support portion 13, which has cushioning relative to the bottom surface of the floor member 11, is formed at a position corresponding to the arch portion inside the floor member 11 through air, etc., thereby supporting the inside of the foot and supporting the inside of the foot. It helps form arches and prevents flat feet.

In addition, the main cause of ankle sprains is most often sprains due to inward spreading. Among the outer sides of the bottom member 11 constituting the insole 10, the portion opposite to the arch support portion 13 is formed upward and high. Through the ergonomically designed center of gravity control unit 14, it is possible to prevent sprains before the center of gravity moves outward after shock is absorbed from the heel when walking, and at the same time, it can move the center of gravity toward the big toe and index toe. .

Referring to FIG. 10, it can be seen that the height of the center of gravity control unit 14 is relatively lower than the height of the arch support unit 13, based on the upper surface of the floor member 11. If the center of gravity control unit 14 If the height is relatively higher than the height of the arch support portion 13, it is not desirable because the weight shift on the sole of the foot may shift inward when walking.

In summary, the present invention relates to a method of forming an insole equipped with a sole muscle strengthening pad for active arch correction and improvement of the movement trajectory of the center of body pressure during walking. In relation to this, referring to Figure 11, which is shown as an example to illustrate the effect of the insole 10 molded by the method according to the present invention, most shoe wearers are unable to step on area A of Figure 11, resulting in bent feet or sprained ankles. This was bound to happen. However, according to the insole 10 molded according to the method of the present invention, the forefoot support portion 120 of the sole muscle strengthening pad 100 is disposed in area A, thereby forming a three-point pressure on the foot and efficiently distributing body weight and supporting the foot. It has a feature that provides a comfortable fit with optimized pressure distribution.

In other words, the physical phenomenon that the pressure due to the body weight coming down from the leg must reach part B in Figure 11 and be distributed to areas A and C is essential in the biomechanical mechanism of the human body. So, even though area B must always distribute energy optimally to areas A and C, area D (foot arch) is in a state where the sole of the foot is floating on the ground during the pressure transfer process from area B to area A. Movement that does not occur well in area A occurs, and instability of the foot that is easily lifted from the inside to the outside of the foot occurs. In particular, in the case of flat feet, the D area is in contact with the ground, so pressure is transmitted as it is, and the fatigue threshold of the foot is low, which can cause fatigue quickly. Accordingly, in the insole 10 molded according to the method of the present invention, the movement of applying and pressing foot pressure to area A of FIG. 11 is preceded, so that area B properly functions as a heel, preventing the cause of the foot from bending, and preventing the heel of the shoe from bending. It can delay the wear of the outer part.

In other words, as long as gravity exists, you have no choice but to walk while touching the ground, but the arch of the foot, which is not in contact with the ground, must support your body weight in empty space, causing physical stress. With the habit of pressing area A in Figure 11, which minimizes the stress, areas A and B function well as a support for area D, thereby optimizing the stable structure and function of the foot. In addition, as area A is pressed and area D is filled with air, the arch of the foot floats off the ground at the moment of lifting the heel off the ground and stepping on the front heel to propel the foot. At this time, the optimal position within the insole (10) of the sole muscle strengthening pad (100) is Through placement, energy efficiency can be improved while walking, contributing to exercise effectiveness and reducing fatigue.

According to these characteristics, the air cushioning function of the sole muscle strengthening pad 100 within the insole 10 distributes the pressure at the moment it is pressed, while simultaneously moving air in the direction of the arch of the foot to safely support the lowered central area of the foot. By doing so, it is meaningful that the stability and mechanical mechanism of the foot is applied. Therefore, it is expected that by molding the insole 10 so that the sole muscle strengthening pad 100 can be placed at the optimal position on the sole of the foot, it is possible to actively correct the arch of the foot and improve the movement trajectory of the body's center of gravity when walking.

The above description is merely an illustrative explanation of the technical idea of the present invention, and those skilled in the art will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but are for explanation, and the scope of the technical idea of the present invention is not limited by these examples. The scope of protection of the present invention should be interpreted in accordance with the scope of the patent claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

1: Upper mold
2: Lower mold
2a: cavity
2b: Inlet
10: Insole
11: Floor member
12: Cover member
13: Arch support part
14: Center of gravity control unit
15: Heel guard
100: Sole muscle strengthening pad
100a: protective member
100b: Cushion material
110: arch support
111: 1st arch line
112: 2nd arch line
120: Foot support part
121: 1st forefoot support line
122: 2nd forefoot support line
123: Third forefoot support line
124: 4th forefoot support line
130: Connection passage part
131: First connection line
132: Second connection line
A1: Area 1
A2: Area 2
A3: Area 3
A4: Area 4
P: boundary point
S1: Section 1
S2: Second section
S3: 3rd section

Claims (4)

It consists of a cushion material and a protection member surrounding the outside of the cushion material, including an arch support portion supporting the arch portion, a forefoot support portion formed in front of the arch support portion to support the forefoot, and a space between the arch support portion and the forefoot support portion. A first step of manufacturing a sole muscle strengthening pad formed including a connecting passage connecting the;
A second step of mounting a cover member on the upper mold, placing the sole muscle strengthening pad on the bottom of a cavity having a shape corresponding to the foot shape of the lower mold, and placing a heel guard on the rear side of the cavity; and
A third step of molding the upper mold and the lower mold, injecting a resin material into the cavity, and then applying heat to integrate the resin material and the cover member to form an insole into which the sole muscle strengthening pad is inserted. Contains,
In the second step,
The cavity is divided into four equal parts: a first region, a second region, a third region, and a fourth region clockwise or counterclockwise from the point adjacent to the big toe based on the center of the forefoot and arch of the foot. Based on the width direction, it is divided into a first section, a second section, and a third section at a ratio of 0.4 to 0.6:5.5 to 6.5:3 to 4 from the point where the big toe is adjacent, and the area between the first and second areas is divided into a first section, a second section, and a third section. Arranging the forefoot support in the second section,
The forefoot support portion is formed to have a width corresponding to the second section and is disposed corresponding to the forefoot portion of the foot in the second step, but is lateralized toward the big toe from the center of the width direction of the cavity,
The arch support portion is formed to have a width within the second section and is disposed corresponding to the arch portion of the foot in the second step, but is disposed lateral toward the big toe from the center of the width direction of the cavity,
An insole equipped with a sole muscle strengthening pad for active correction of the arch and improving the movement trajectory of the center of body pressure during walking, characterized in that the insole is inserted so that the sole muscle strengthening pad is lateralized from the width direction of the foot as a whole to the big toe side. Molding method. According to paragraph 1,
A method of forming an insole with a sole muscle strengthening pad for active correction of arches and improving the movement trajectory of the center of body pressure during walking, wherein a plurality of penetration holes are formed in the upper and lower directions at the edge of the sole muscle strengthening pad. According to paragraph 1,
The insole is continuously produced while a plurality of the upper mold and the lower mold are transported by a conveyor belt preheated to 60 to 70 ° C.
Molding of an insole equipped with a sole muscle strengthening pad for active correction of the arch and improvement of the movement trajectory of the center of body pressure during walking, characterized in that the upper mold and the lower mold are maintained at 50 to 55 ° C. by the preheated conveyor belt. method. According to paragraph 1,
The third step is,
A method of forming an insole with a sole muscle strengthening pad for active arch correction and improving the movement trajectory of the body's center of pressure during walking, characterized in that it is molded for 5 to 10 minutes and then cured at room temperature for 5 to 15 minutes.

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