Footwear and insoles

Abstract

The aim is to provide footwear and insoles that reduce feelings of instability and discomfort during walking and standing, and optimize foot balance during walking and standing, such as suppressing bowlegged tendencies. [Solution] The insole 1 of the footwear is provided with a forefoot support portion, a midfoot support portion, and a rearfoot support portion in that order from the front. The midfoot support portion has a first raised portion 3a on its outer side, and the first raised portion is characterized by lifting the outer part of the midfoot of the foot. Furthermore, the midfoot support portion has a second raised portion 3b on its inner side, which lifts the inner part of the midfoot of the foot.

Description

Technical Field

[0001] This invention relates to footwear and insoles.

Background Art

[0002] Recently, due to lifestyle habits, muscle weakness, and worsening posture, the number of people troubled by O-shaped legs has been increasing. Many people with O-shaped legs tend to put more weight on the outer part of their feet when walking, which easily places a burden on their knees and ankles.

[0003] By the way, there is a known footwear that enables a user with O-shaped legs to stably land from the heel during walking, stabilize the body's center of gravity, make it easier to maintain balance during walking, reduce the risk of falling, and disperse the burden on the muscles and joints of the entire foot (see, for example, Patent Document 1).

[0004] The footwear of Patent Document 1 includes a sole on which a user's foot is placed and has an outer peripheral shape along the outer periphery of the foot, and a fixing auxiliary part that assists in fixing the foot to the sole. The heel facing surface on the upper surface of the sole that faces the heel of the foot has both side edges and a rear edge along the outer peripheral edge of the upper surface of the heel facing part of the sole, and is a concave surface that is recessed toward the grounding surface of the sole with both side edges and the rear edge as the upper edges and has a substantially annular outer peripheral shape in plan view.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, the footwear of Patent Document 1 has a structure where the heel part is concave and the front part is thick. When actually used, there may be a feeling that the ankle and heel are unstable and there is a sense of discomfort.

[0007] Therefore, in researching the structure of footwear aimed at optimizing foot balance, such as improving bowleggedness, the inventors analyzed how the foot moves during walking (the process from when the foot touches the ground, supports the body, and pushes off) and the load patterns during walking.

[0008] First, the process of walking begins with initial contact, the moment the heel of the foot first touches the ground. This is followed by the load response phase, from heel contact to forefoot contact with the ground, the mid-stance phase, when the opposite foot leaves the ground and the weight is supported by only one foot, the terminal stance phase, which is the period until the heel leaves the ground and generates forward propulsion, and then the transition from the weight-supporting phase to the push-off phase, which leads to the early swing phase, mid-swing phase, and late swing phase.

[0009] Humans walk by repeating this process, and the feet perform the contradictory functions of shock absorption and propulsion in the direction of movement. Furthermore, it has been found that the weight transfer of the feet is carried out in great detail during walking.

[0010] However, conventional insoles designed to improve bowlegs, as well as the invention described in Patent Document 1, have problems such as insufficient control of the movement of the midfoot to forefoot after heel strike, inability of the ankle and heel, and discomfort, when considering the load pattern during walking.

[0011] Therefore, in order to solve the above problems, the inventors of this invention have found that in order to prevent instability and discomfort in the ankle and heel, the structure of the surface that the foot or sock directly touches should be designed to support the outer part of the foot, especially the outer part of the midfoot (the middle of the sole).

[0012] The present invention aims to provide footwear and insoles that optimize foot balance during walking and standing, such as suppressing bowlegged tendencies, while minimizing feelings of instability and discomfort during walking and standing. [Means for solving the problem]

[0013] An insole for footwear according to one aspect of the present invention comprises, from the front, a forefoot support portion, a midfoot support portion, and a rearfoot support portion in that order, wherein the midfoot support portion has a first raised portion whose outer part is raised, and the first raised portion is characterized in that it lifts the outer part of the midfoot of the foot.

[0014] This method lifts and supports the outer part of the midfoot. The midfoot support area is the part that supports the middle of the foot in the anterior-posterior direction, with the forefoot support area and hindfoot support area being the parts before and after it. In other words, by lifting the outer part of the midfoot support area, weight is not shifted too far outward when walking, excessive tilting of the ankle joint is suppressed, and the knee is supported to stay naturally straight.

[0015] In other words, by guiding the outward-tilting tendency of bowlegs towards the inward side, the arch of the foot is gently supported, and the foot's natural balance is corrected with each step, thus preventing feelings of instability or discomfort while walking. This reduces bowlegs caused by guiding the foot inward and causing the knee to shift outward, corrects walking balance, and enables smooth weight transfer.

[0016] Furthermore, this insole is characterized in that the first raised portion has a first side wall portion on the outer edge of the metatarsal support portion. In this way, the first side wall portion of the first raised portion more reliably suppresses the foot from sliding outward.

[0017] Furthermore, the insole is characterized in that the forefoot support portion has a raised portion that is formed continuously with the first raised portion and lifts the outer portion of the foot, and this raised portion is formed lower than the first raised portion and its height gradually decreases toward the front.

[0018] In this way, a ridge is formed in the forefoot support area that is continuous with the first ridge. This ridge is lower than the first ridge and gradually decreases in height towards the front, allowing the insole surface to make contact with the midfoot, including the arch of the foot, thus preventing instability and discomfort during walking.

[0019] In addition, this insole has a raised portion that lifts the outer part of the foot, where the rear foot receiving portion is continuously formed with the first raised portion, and the raised portion is formed to have the same height as the first raised portion or lower than the first raised portion.

[0020] By doing so, due to the raised portions on the outer sides of the mid-foot and rear-foot parts of the foot, while firmly holding the heel part of the foot, the tendency of the foot to tilt outward (bow-leg tendency) is more firmly induced inward.

[0021] In addition, this insole is characterized in that the side surface on the foot side of the first raised portion is an inclined surface that becomes closer to the inside as it goes downward. Thereby, the insole contacts the ground along the curvature below the foot and can firmly hold the foot, and can firmly guide the foot inward.

[0022] Here, in order to optimize the balance of the foot during walking or standing, such as improving the bow-leg tendency, it has been found that the arch structure of the foot and the structures of the mid-foot such as the cuneiform bones and the navicular bone contribute to load deformation and the rigidity of the foot, and the inventors considered that the support of the mid-foot is the key.

[0023] Therefore, this insole further has a second raised portion where the inner part of the mid-foot receiving portion bulges, and the second raised portion is characterized by lifting the inner part of the mid-foot of the foot.

[0024] By providing the second raised portion on the inner part of the foot in this way, due to the shape along the instep part of the foot, the insole contacts firmly here, increasing stability, and suppressing the foot from tilting too much inward. In addition to assisting in forming the outer longitudinal arch of the foot by the first raised portion, by assisting in forming the inner longitudinal arch of the foot by the second raised portion, further optimization of the balance of the foot can be achieved.

[0025] In addition, this insole is characterized in that the second raised portion has a second side wall portion on the inner edge portion of the mid-foot receiving portion. By doing so, the second side wall portion of the second raised portion more surely suppresses the foot from tilting too much inward.

[0026] Also, this insole has a raised portion that lifts the outer part of the foot, where the front foot receiving part is continuously formed with the second raised portion. The raised portion is formed lower than the second raised portion and gradually decreases in height toward the front side. By doing so, the insole surface contacts the ground along the curvature of the midfoot part including the instep part of the foot, so that a sense of instability or discomfort during walking can be avoided.

[0027] Also, this insole has a raised portion that lifts the inner part of the foot, where the rear foot receiving part is continuously formed with the second raised portion. The raised portion is formed at the same height as the second raised portion or lower than the second raised portion.

[0028] By doing so, since there is a second raised portion on the inner side of the midfoot part and the rear foot part of the foot, when the foot is firmly held and the first raised portion guides the foot inward, the foot can be prevented from falling too far inward, improving stability.

[0029] Also, this insole is characterized in that the side surface of the foot side of the second raised portion is an inclined surface that becomes closer to the inner side as it goes downward. Thereby, the insole contacts the ground along the curvature below the foot and can firmly hold the foot, and can firmly guide the foot inward.

[0030] Also, this insole is characterized in that at least the inner side surface of the outer side surfaces on both the left and right sides of the midfoot receiving part is an inclined surface that becomes closer to the inner side as it goes downward. By doing so, flexibility of the midfoot receiving part of the insole is ensured, and a sense of discomfort during walking or the like is suppressed.

[0031] Also, this insole is characterized in that the front foot receiving part is thinner than the midfoot receiving part and the rear foot receiving part.

[0032] By doing so, in the front foot part where the movement of the foot is large, flexibility is ensured, so that the wearing comfort is good and the walking is smooth.

[0033] Furthermore, this insole is characterized by having a forefoot support portion formed with a uniform thickness. This further improves comfort and makes walking smoother.

[0034] Furthermore, this insole is characterized in that the rear foot support portion is thinner than the midfoot support portion, and a recess is formed in the rear foot support portion at a position corresponding to the heel.

[0035] This design allows the rear foot support to fit the shape of the heel, providing firm support for the heel and creating a sense of stability from the moment the foot touches the ground, enabling a natural and smooth gait.

[0036] Furthermore, this insole is characterized in that the metatarsal support portion is inclined from the inner portion where the second raised portion is formed toward the outer portion.

[0037] The inclination towards the outer part of the midfoot reduces the outward movement of the knee from the loading response phase to the mid-stance phase.

[0038] Furthermore, this insole is characterized by having mountain-shaped notches on the periphery of the insole.

[0039] In this way, the type of insole, such as its size, can be easily determined by sight or touch, based on the number of mountain-shaped notches located somewhere on the periphery. For example, the notches could be placed on the inner or outer periphery of the forefoot support area, with one notch indicating size S, two indicating size M, three indicating size L, and so on.

[0040] Furthermore, this insole is characterized in that it is made of multiple materials layered together, and the surface of the top layer is treated to prevent slipping.

[0041] This prevents the foot from slipping inside the shoe, allowing for stable foot support and improving stability while walking.

[0042] Footwear according to one aspect of the present invention is characterized by comprising any of the above-mentioned insoles and / or an outsole with the shape of the insole formed on its surface.

[0043] In this way, by providing shoes with insoles of the structure described above, the shoes can achieve the effects described above. Furthermore, by providing outsoles with the same uneven surface shape as the insoles described above, the outsoles alone can achieve the same effects as the insoles described above, and in this case, it also becomes possible to use insoles with a general flat shape. [Effects of the Invention]

[0044] According to this invention, by suppressing the outward movement of the foot, the footwear and insole can be made to suppress the tendency towards bowlegs while preventing feelings of instability and discomfort during walking. [Brief explanation of the drawing]

[0045] [Figure 1] This is a schematic perspective view of an insole (for the left foot) according to one embodiment of the present invention. [Figure 2] This is a schematic plan view of an insole (for the left foot) according to one embodiment of the present invention. [Figure 3] This is a schematic bottom view of an insole (for the left foot) according to one embodiment of the present invention. [Figure 4] This is a longitudinal cross-section of an insole according to one embodiment of the present invention, and is a cross-sectional view taken along line AA in Figure 2. [Figure 5] This is a longitudinal cross-section of an insole according to one embodiment of the present invention, and is a cross-sectional view taken along line BB in Figure 2. [Figure 6] This is the widthwise end face of the forefoot support portion of an insole according to one embodiment of the present invention, and is a cross-sectional view of line CC in Figure 2. [Figure 7] This is the widthwise end face of the midfoot support portion of an insole according to one embodiment of the present invention, and is a view of the end face along line DD in Figure 2. [Figure 8]This is the widthwise end face of the rear foot support portion of an insole according to one embodiment of the present invention, and is a view of the end face along line EE in Figure 2. [Figure 9] This is a schematic diagram showing the skeletal structure of the left foot as seen from the bottom. [Modes for carrying out the invention]

[0046] The following describes embodiments of the present invention, but various additions, modifications, or deletions are possible without departing from the spirit of the present invention. For example, the following embodiments mainly describe an insole for footwear, but it is also possible to apply the uneven surface shape of the insole of this embodiment to the sole.

[0047] <Insole structure of this embodiment> Figure 1 is a schematic perspective view of an insole according to one embodiment of the present invention. Figure 2 is a schematic plan view of the same insole. Figure 3 is a schematic bottom view of the same insole. Figure 4 is a longitudinal cross-section of the same insole, taken along line AA. Figure 5 is a longitudinal cross-section of the same insole, taken along line BB. Figure 6 is a widthwise end face of the forefoot support portion of the same insole, taken along line CC. Figure 7 is a widthwise end face of the midfoot support portion of the same insole, taken along line DD. Figure 8 is a widthwise end face of the rearfoot support portion of the same insole, taken along line EE. Figure 9 is a schematic diagram showing the skeletal structure of the foot as seen from the bottom.

[0048] As shown in Figures 1, 2, and 3, the insole 1 of the footwear in this embodiment has, from the front side which is the toe side, a forefoot support portion 2 that supports the forefoot of the foot, a midfoot support portion 3 that supports the midfoot of the foot, and a rearfoot support portion 4 that supports the rearfoot of the foot.

[0049] As shown in Figure 9, the forefoot refers to the part of the foot's skeletal structure from the toes to the metatarsals (the long bones on the top of the foot). The midfoot, following the forefoot, is the part of the foot's skeletal structure mainly composed of the navicular, cuboid, and cuneiform bones, and includes the arch of the foot. The hindfoot, following the midfoot, is the part of the foot's skeletal structure mainly composed of the talus and calcaneus, and includes the heel of the foot. The forefoot support part 2, midfoot support part 3, and hindfoot support part 4 of insole 1 correspond to the forefoot, midfoot, and hindfoot, respectively.

[0050] (Structure of the midfoot support area) As shown in Figures 4, 5, and 7, the insole 1 has a first raised portion 3a on the outer part of the metatarsal support portion 3 that lifts the outer part of the midfoot of the foot. In other words, the raised portion 3a that lifts the outer part of the midfoot of the foot is a part that supports the outer part of the midfoot of the foot so that it does not fall outwards.

[0051] Furthermore, the first raised portion 3a has a first side wall portion 3aa on the outer edge of the metatarsal support portion 3. The first side wall portion 3aa reliably supports the outer part of the metatarsal portion of the foot to prevent it from tilting outward.

[0052] By lifting the outer portion of the metatarsal support 3 of the foot, weight is not shifted too far outward when walking, excessive tilting of the ankle joint is suppressed, and the knee is supported to naturally straighten outwards.

[0053] The metatarsal support portion 3 is the part that supports the midfoot of the foot, with the forefoot support portion 2 and the hindfoot support portion 4 located in front of and behind it. The second raised portion 3b, which lifts the medial part of the midfoot, is formed to correspond to the arch of the foot. Furthermore, the second raised portion 3b extends to the part corresponding to the arch of the foot and has a second side wall portion 3ba on the medial edge of the metatarsal support portion 3.

[0054] Furthermore, the outer first ridge 3a and the inner second ridge 3b of the metatarsal support 3 have curved, inclined surfaces on the foot-side, with the lower part being closer to the foot. As a result, the insole makes contact with the ground along the downward curve of the foot, allowing the outer first ridge 3a to firmly guide the foot inward, while the inner second ridge 3b prevents the foot from tilting too far inward, thus providing firm support for the foot from both sides.

[0055] Furthermore, the outer sides of the left and right metatarsal support section 3 are sloped surfaces 3c that become more inward as they go downwards (see Figure 6). This ensures the flexibility of the metatarsal support section 3 and suppresses discomfort during walking and standing. Note that even if these sloped surfaces 3c are only on the outer sides of the inner sides of the left and right sides, a certain effect can be obtained.

[0056] These structures prevent the foot from rolling too far inward, and by firmly supporting the midfoot from both the outside and inside, stability is improved, while also reducing feelings of instability and discomfort during walking.

[0057] (Configuration of the rear leg support section) As shown in Figures 4, 5, and 8, the rear foot support portion 4 of the insole 1 has a raised portion 4a that is formed on the outer side, continuous with the first raised portion 3a, and lifts the outer portion of the rear foot. In this embodiment, the raised portion 4a is formed so that its height gradually decreases from that of the first raised portion 3a.

[0058] As a result, the raised portions on the outer sides of the midfoot and hindfoot firmly hold the foot in place, while firmly guiding the outward-tilting tendency of bowlegs inward. Note that the configuration of the raised portion 4a is just one example of this embodiment, and the raised portion 4a can also be formed to be approximately the same height as the first raised portion 3a.

[0059] Furthermore, the rear foot support portion 4 of the insole 1 also has a raised portion 4b on the inner side that is formed continuously with the second raised portion 3b. In this embodiment, the raised portion 4b is formed so that its height gradually decreases from that of the second raised portion 3b.

[0060] As a result, the presence of the second and fourth ridges 3b and 4b on the medial side of the midfoot and hindfoot of the foot provides firm support to the foot, while preventing the foot from tilting too far inward when the foot is guided inward by the first and fourth ridges 3a and 4a, thereby improving stability. Note that the configuration of the fourth ridge is also an example of this embodiment, and the fourth ridge can be formed to be approximately the same height as the second ridge 3b.

[0061] Furthermore, this insole 1 has a rear foot support section 4 that is thinner than the midfoot support section 3, and a recess 4c is formed in the rear foot support section 4 at a position corresponding to the heel. The heel of the foot is accommodated in this recess 4c, providing firm support to the heel. This improves stability when the foot is on the ground, such as when walking or standing, allowing for a natural and smooth gait.

[0062] (Structure of the forefoot support) As shown in Figures 4, 5, and 6, the forefoot support portion 2 of the insole 1 has a raised portion 2a that is formed continuously with the first raised portion 3a on the outer side and lifts the outer part of the forefoot of the foot. The raised portion 2a is formed lower than the first raised portion 3a and is formed so that the height gradually decreases toward the front side, which is the toe side. In this way, the raised portions on the outer side of the midfoot and forefoot of the foot cause the insole surface to make contact with the ground in a manner that follows the curvature of the midfoot, including the arch of the foot, making it less likely to feel unstable or uncomfortable while walking.

[0063] Furthermore, the forefoot support portion 2 of the insole 1 also has a raised portion 2b on the inner side that is continuous with the second raised portion 3b. The raised portion 2b is formed lower than the first raised portion 3b, and its height gradually decreases towards the front side, which is the toe side. In this way, the raised portions on the inner side of the midfoot and forefoot allow the insole surface to make contact with the ground in a way that further conforms to the curvature of the midfoot, including the arch of the foot, making it less likely to feel unstable or uncomfortable while walking.

[0064] Furthermore, the forefoot support portion 2 of this insole 1 is thinner than the midfoot support portion 3 and the rearfoot support portion 4. This ensures flexibility in the forefoot, where there is a lot of foot movement, resulting in a comfortable fit, smoother walking, and less discomfort.

[0065] Furthermore, a mountain-shaped notch 2c is formed on the inner peripheral edge of the forefoot support portion 2. In this embodiment, the notch is formed so that two peaks remain, and this is an example of a size M. In this embodiment, one peak indicates a size S, three peaks indicate a size L, and so on.

[0066] Furthermore, the location, number, and shape of the notches are not limited to these, nor are the types of insoles indicated by the notches limited to size. By providing notches corresponding to the type of insole at any location on the periphery of insole 1, customers can easily identify the type of insole by sight or touch.

[0067] (Effects of this embodiment) By attaching the insole 1 of this embodiment, which has the above configuration, to footwear, the first raised portion 3a of the metatarsal support portion 3 lifts the outer part of the foot, preventing excessive weight shifting outward when walking, suppressing excessive tilt changes of the ankle joint, and supporting the knee to naturally straighten. In particular, it reduces the outward movement of the knee from the load response phase to the mid-stance phase. Furthermore, it assists in the formation of the lateral longitudinal arch of the foot, improving foot stability.

[0068] Furthermore, the second protrusion 3b on the medial side of the metatarsal support 3 prevents the foot from tilting too far inward, and improves stability by firmly holding the midfoot from both the lateral and medial sides. In other words, tendencies such as bowlegs, which tilt outward, are guided inward and suppressed, and excessive inward tilting of the foot is prevented. In addition, the formation of the medial longitudinal arch of the foot is assisted, further improving foot stability, and excessive tilting changes of the ankle joint are suppressed, reducing discomfort. As a result, the arch of the sole of the foot is gently supported, and the foot's natural balance is restored with each step.

[0069] Furthermore, by gently lifting the outer portion of the rearfoot support portion 4 in addition to the outer portion of the midfoot support portion 3, it helps prevent weight from shifting too far to the outside when walking, and is advantageous in supporting the knee to naturally straighten. In addition, since the rearfoot support portion 4 has a recessed area corresponding to the heel, it fits the shape of the foot, improving stability from the initial contact moment the foot touches the ground to the load response phase, allowing for natural and smooth walking.

[0070] Furthermore, by gently lifting the outer part of the forefoot support part 2 in addition to the outer part of the midfoot support part 3, it helps prevent weight from shifting too far to the outside when walking, and is advantageous in supporting the knee to stay naturally straight. Therefore, it is possible to achieve both comfort and a beautiful gait.

[0071] These features ensure a smooth transition of weight from initial contact with the ground during walking to the stance and propulsion phases, allowing for proper control of the arch movement of the foot. Combining expert knowledge with ergonomic principles, these insoles provide a noticeable difference simply by wearing them. By balancing the foot, they support overall posture and movement, enabling you to walk beautifully, less easily, and comfortably every day.

[0072] Thus, unlike conventional insoles and footwear that aim for similar functions, this product gently supports the outer part of the midfoot, in particular, naturally guiding weight that tends to shift outward towards the inside. This suppresses the tendency for bowlegs to tilt outward, improves balance during walking and standing, and reduces strain on the knees and ankles.

[0073] <Other Embodiments> As described above, embodiments of the present invention have been explained with reference to the drawings, but various additions, modifications, or deletions are possible without departing from the spirit of the present invention. For example, the portion that lifts the outer portion of the forefoot can be formed in the same way as the portion that lifts the outer portion of the midfoot, and the portion that lifts the outer portion of the forefoot can be formed continuously with the portion that lifts the outer portion of the midfoot. This prevents weight from shifting outward when walking and supports the knee to naturally straighten.

[0074] Furthermore, while the above embodiment described an insole with an uneven surface, it is also possible to apply this uneven shape to the outsole. This allows the outsole alone to achieve the same effect as the above-described insole. In this case, it is also possible to use a general-purpose flexible, flat insole. [Explanation of Symbols]

[0075] 1. Insole 2 Forefoot support 2a Ridge 2b Ridge 2c Notch 3. Midfoot support 3a 1st protuberance 3aa 1st side wall part 3b 2nd protuberance 3ba 2nd side wall part 3c slope 4. Rear foot support 4a Ridge 4b Ridge 4c recess

Claims

1. It is an insole for footwear, From the front, it is equipped with a forefoot support, a midfoot support, and a hindfoot support in that order. The aforementioned midfoot support portion has a first raised portion on its outer side, The first raised portion is characterized by lifting the outer portion of the midfoot of the foot. Insole.

2. The first raised portion is characterized by having a first side wall portion on the outer edge of the midfoot support portion. The insole according to claim 1.

3. The forefoot support portion has a raised portion that is formed continuously with the first raised portion and lifts the outer portion of the foot, and the raised portion is formed lower than the first raised portion and is characterized in that its height gradually decreases toward the front. The insole according to claim 2.

4. The hind foot support portion has a raised portion that is formed continuously with the first raised portion and lifts the outer portion of the foot, and the raised portion is characterized in that it is formed to be the same height as the first raised portion or lower than the first raised portion. The insole described in claim 3.

5. The foot-side surface of the first raised portion is characterized by having a sloping surface that becomes more inward as it goes downwards. The insole according to claim 4.

6. Furthermore, the inner portion of the metatarsal support has a second raised portion, The second raised portion is characterized by lifting the medial portion of the midfoot of the foot. The insole according to claim 5.

7. The second raised portion is characterized by having a second side wall portion on the inner edge of the midfoot support portion. The insole according to claim 6.

8. The forefoot support portion has a raised portion that is formed continuously with the second raised portion and lifts the outer portion of the foot, and the raised portion is formed lower than the second raised portion and its height gradually decreases toward the front. The insole according to claim 7.

9. The hind foot support portion has a raised portion that is formed continuously with the second raised portion and lifts the inner portion of the foot, and the raised portion is formed to be the same height as the second raised portion or lower than the second raised portion. The insole according to claim 8.

10. The foot-side surface of the second raised portion is characterized by having a sloping surface that becomes more inward as it goes downwards. The insole according to claim 9.

11. The outer sides of the midfoot support portion on both the left and right sides are characterized in that at least the inner side is an inclined surface that becomes more inward as it goes downward. An insole according to any one of claims 1 to 10.

12. The forefoot support portion is characterized by being thinner in thickness than the midfoot support portion and the rearfoot support portion. An insole according to any one of claims 1 to 10.

13. The forefoot support portion is characterized by being formed with a uniform thickness. The insole according to claim 12.

14. The rear foot support portion is characterized by being thinner in thickness than the midfoot support portion. The insole according to claim 12.

15. A recess is formed in the rear foot support portion at a position corresponding to the heel. The insole according to claim 12.

16. The metatarsal support portion is characterized by being inclined from the inner portion where the second protrusion is formed toward the outer portion. An insole according to any one of claims 1 to 10.

17. The insole is characterized by having a mountain-shaped notch on its peripheral edge. An insole according to any one of claims 1 to 10.

18. The aforementioned insole is made of multiple materials layered together. The top layer is characterized by having an anti-slip surface. An insole according to any one of claims 1 to 10.

19. Footwear characterized by comprising an insole according to any one of claims 1 to 10, and / or an outsole having the shape of the insole according to any one of claims 1 to 10 formed on its surface.

20. Footwear comprising an insole according to claim 12, and / or an outsole having the shape of the insole according to claim 12 formed on its surface.

Images