JP4856658B2 - Insoles - Google Patents

Description

  The present invention relates to a shoe insole used for footwear such as shoes and sandals, and more particularly to a shoe insole that supports natural walking and can prevent the occurrence of foot disorders such as hallux valgus.

  The human walking mechanism starts with the foot heel landing (this stage is called the “bed-contacting period”), and then the center of gravity on the heel starts from the bone head of the metatarsal bone of the fifth finger of the forefoot. It moves to the bone head of the metatarsal bone of the first finger and becomes a stable standing position (this stage is called “mid-stance stance”), and then the metatarsal joint joint warps (dorsiflexion) In this case, the floor surface is kicked up with the bone head (fingerball) of the metatarsal bone of the first finger as a fulcrum (this stage is referred to as the “bedout period”). By performing ideal walking along this walking mechanism, the burden on each part of the body is reduced, and various obstacles can be prevented.

  Especially in the case of a person who has a short gastrocnemius or a soleus muscle or a person who has a hard joint of the foot, especially in a person who is difficult to bend the thumb, especially in the above-mentioned bed leaving period, the dorsiflexion of the thumb is difficult to be performed strongly and smoothly. This may place an excessive burden on the plantar muscles and may cause damage such as hallux valgus, Achilles tendonitis, plantar aponeurosis, and the eyes and heels of the toes.

  Therefore, the applicant has recently proposed a shoe insole that can prevent the occurrence of various kinds of foot obstacles by supporting natural and ideal walking motions (see, for example, Patent Document 1). In this insole, a support substrate made of a synthetic resin plate is provided on the back surface of a flexible and flexible topsheet having an outer shape corresponding to the shape of the sole, corresponding to the region from the radius to the proximal phalanx of the phalange. A back surface made of an elastic material in a region where the support substrate is provided with a notch in at least the region corresponding to the middle foot and knee joint of the thumb and the support substrate on the back surface of the top sheet is not attached A sheet is attached.

JP 2006-305310 A

When the foot is placed on the above-shoe insole, the rear foot portion and the front foot portion are supported by the support substrate, but the middle foot and phalanx joint of the thumb is depressed at the position of the notch, so the portion of the thumb Dorsiflexion, that is, warping of the metatarsal joint of the first finger is supported, and the floor surface is kicked up by the bone head of the metatarsal bone of the first finger powerfully and smoothly. This second is done from a finger - each metatarsophalangeal joint of the fifth finger smoothly Kagamo the back of each finger bone of the second to fifth fingers in conjunction with. Thereby, the movement of the foot from the middle stage of stance to the bed leaving stage is ideally performed, and a natural walking motion is realized. As a result, it does not place an excessive burden on each part of the foot, especially the stress on the plantar muscle is greatly improved, and it is possible to prevent the occurrence of hallux valgus, Achilles tendonitis, plantar aponeurosis and fishy eyes and heel defects .

The above insole is ideally designed to allow leg movements from the middle stance phase to the bedtime period, in order to achieve natural walking movements. The movement of the foot is not particularly taken into consideration, and support is not obtained for the walking movement from the flooring period to the middle stage of stance. Therefore, too much force may be applied to the thumb when kicking up , which may cause trouble such as hallux valgus.

  The present invention has been made by paying attention to the above-mentioned problems, and enables the ideal exercise of the foot by assisting natural and ideal walking movements from the floor contact stage to the middle stance stage. It is an object of the present invention to provide a shoe insole that prevents the occurrence of foot disorders such as hallux valgus.

  A shoe insole according to the present invention is obtained by attaching a support substrate made of a synthetic resin plate to the back surface of a flexible topsheet having an outer shape corresponding to the shape of the sole, and corresponds to the ribs of the support substrate. A heel portion that protrudes toward the back surface is formed in the region to be operated. On the lower surface of the heel portion, a first flat region that is horizontal on the outer edge side and a second flat region on the inner edge side are formed across a boundary along the length direction. The second flat region has an inclination angle of not less than 0.5 degrees and not more than 3 degrees with respect to the first flat region so that the height of the heel portion is lower on the inner edge side of the support substrate than on the boundary side. It is formed in the inclined surface which makes | forms.

  In the above configuration, the “outer edge” means the side edge opposite to the right foot when standing with both feet aligned, and the side edge opposite to the left foot when referring to the right foot. Yes. Incidentally, the side on which the left and right feet oppose is the “inner edge” with respect to the “outer edge”.

  When a person walks, the center of gravity on the heel moves to the forefoot after the foot heel has landed, but in the correct walking from this flooring to the middle stance, the grounding point of the heel is slightly outside. The center of gravity of the heel is grounded from the outside to the inside while the center of gravity on the heel moves to the forefoot. In the insole according to the present invention, when walking, the lower surface of the heel portion of the support substrate is first contacted with the first flat region at the outer position, and then the inner position when the center of gravity on the heel moves to the forefoot portion. Since the second flat region is formed on an inclined surface having a predetermined inclination angle θ (0.5 ° ≦ θ ≦ 3 °) with respect to the first flat region, the ridges are directed from the outside to the inside. The action of touching the ground is supported, and the movement of the foot can be ideally performed from the flooring period to the middle stage of stance. The stability of the body is maintained by landing the forefoot part in the middle of the stance from slightly inside to outside.

  Here, the inclination angle θ of the inclined surface of the second flat region is set in the range of 0.5 ° ≦ θ ≦ 3 ° because the adjustment becomes excessive when the inclination angle θ exceeds 3 ° If it causes problems such as pronation and hallux valgus, and if the inclination angle θ is smaller than 0.5 degrees, the support function for walking motion from the floor contact period to the middle stance phase cannot be obtained, and the angle setting does not make sense. Because.

In the above-described configuration of the present invention, artificial leather or the like is used for the “surface sheet”, but it is not limited to artificial leather as long as it is a flexible material. Further, the "support substrate" for example hard plastic plate is used, but not limited thereto, relatively hard cushion member (such as ethylene - vinyl acetate copolymer (EVA)) may be used.

  In a preferred embodiment of the present invention, the boundary is in a position offset from the center line of the lower surface of the heel portion toward the inner edge. According to this embodiment, since the first flat region is wider than the second flat region, the contact of the footpad with the ground is stabilized during the floor contact period.

  In a further preferred aspect of the present invention, the support substrate is of a size and shape corresponding to a region from the radius to the proximal phalanx of the phalange, and at least the metatarsophalangeal joint of the thumb in the support substrate A notch portion is provided in a region corresponding to, and a back sheet made of an elastic material is pasted in a region where the support substrate on the back surface of the top sheet is not pasted.

According to this embodiment, the middle foot phalanx joint of the thumb is depressed at the position of the notch, so that the dorsiflexion of the part of the thumb, that is, the warp of the middle finger joint of the first finger is supported. The floor of the metatarsal bone is kicked up strongly and smoothly by the head of the metatarsal bone. In conjunction with this, the second to fifth fingers are connected to the second to fifth finger joints. Since the dorsiflexion of the phalanges is also performed smoothly, the movement of the foot is ideally performed from the middle stance phase to the bedtime.
In this way, by ideally exercising the foot from the floor contact stage to the bed leaving stage, there is no unreasonable burden on each part of the foot, especially the stress on the plantar muscle is greatly improved, and the hallux valgus Achilles tendonitis does not cause damage, such as plantar aponeurosis or thumb fish eyes and heels.

Support substrate of this embodiment may be a single member across the front to support the forefoot portion extending from the metatarsal and rear substrate supporting the hindfoot leading to metatarsal from the heel bone to the distal phalanx of the finger bones It may be divided into partial substrates. When the support substrate is composed of a single member as a whole, for example, it is composed of a hard plastic plate. In this case, in order to facilitate the movement of the forefoot part during the bed leaving period, the bone head of the metatarsal bone is used. It is desirable that the region corresponding to the proximal phalanx of the phalange is formed with a thickness that can bend, and the other region is formed with a thickness that does not bend in order to firmly support the rear foot.
Further, when the support substrate is divided into a rear substrate and a front substrate, the rear substrate can be formed of a material that does not bend (for example, a hard plastic plate), and the front substrate can be bent. It may be formed of a material (for example, EVA).

In a preferred embodiment of the present invention, the notch portion extends from the inner edge to the front edge of the support substrate, the bone head of the metatarsal bone of the first finger, the metatarsal joint of the first toe, and the phalange of the first finger. together Once formed by cutting out a region corresponding to the proximal phalanx, partially thick by interposing the sheet material in a region corresponding to the phalanges of the thumb between the topsheet and the backsheet A thick thick part is formed. According to this embodiment, since the dorsiflexion function of the thumb part at the time of walking is further enhanced by the presence of the thick-walled portion, the exercise in the bed leaving stage becomes smooth and the walking exercise can be performed more smoothly.

  According to the present invention, it is possible to support natural and ideal walking movements from the floor contact period to the middle stance phase, and it is possible to ideally perform the movement of the foot, and the occurrence of a foot disorder such as hallux valgus. Can be prevented.

  1 to 3 show a configuration of a shoe insole 1 according to an embodiment of the present invention. FIG. 1 shows an appearance of the shoe insole 1 viewed from the back side, and FIG. 3 shows a center line c. The structure of the shoe insole 1 when shown in cross section is shown. FIG. 2 shows the outer shape of the insole 1 (indicated by a one-dot chain line) together with the skeleton of the foot 2. Although the illustrated insole 1 is for the right foot, the structure for the left foot is the same, and illustration and description are omitted here.

  The insole 1 in the illustrated example has a support substrate 3 attached to the back surface of a top sheet 4 that is soft and flexible. The topsheet 4 of this embodiment is formed in a shape along the contour of the inner bottom surface of the shoe with artificial leather, in other words, a contour corresponding to the shape of the sole, but it is a flexible material that flexes appropriately under load. If it is a thing, the material of the surface sheet 4 will not be ask | required.

  The support substrate 3 is formed in a size and shape corresponding to a region from the ribs 27 of the foot 2 to the proximal phalanges 22b to 22e of the phalanges 21b to 21e of the second to fifth fingers. The distal phalanges 23 a to 23 e and the middle phalanges 24 b to 24 e of the phalanges 21 b to 21 e of the finger to the fifth finger protrude from the front end edge 31 </ b> C of the support substrate 3.

  The support substrate 3 has a notch 6 formed in a region corresponding to the middle foot phalangeal joint 25a of the thumb. In this embodiment, the notch 6 has the support substrate 3 extending from the inner edge 31A to the front edge 31C of the bone head of the first finger metatarsal 26a, the thumb metatarsal joint 25a, and the first finger phalange 21a. A region corresponding to the proximal phalanx 22a is cut out, and when the foot is placed on the shoe insole 1, the middle foot phalanx joint 25a of the thumb is depressed. In FIG. 2, reference numerals 25b to 25e denote the middle foot phalanx joints of the second to fifth fingers.

In this embodiment, the support substrate 3 is formed of a hard plastic plate, and the phalanges 21b of the second to fifth fingers from the bone heads of the metatarsals 26b to 26e of the second to fifth fingers. The region S corresponding to the proximal phalanxes 22b to 22e of ˜21e is formed with a thin thickness so as to bend easily, and the other regions are formed with a thick thickness so as not to be easily bent even when subjected to a load. Yes.

  In a region corresponding to the ribs 27 of the support substrate 3, a heel portion 5 that protrudes toward the back side is formed. As shown in FIGS. 1 and 4, the lower surface of the heel portion 5 includes a first flat region 51 that is horizontal on the outer edge 31B side and a second flat region 52 on the inner edge 31A side in the length direction. They are formed with a linear boundary 50 along them. The second flat region 52 is 0.5 degrees or more with respect to the first flat region 51 so that the height h of the heel portion 5 is lower on the inner edge 31A side of the support substrate 3 than on the boundary 50 side. It is formed on an inclined surface having an inclination angle θ of 3 degrees or less. In this embodiment, the boundary 50 is located at a position offset from the center line c of the lower surface of the heel portion 5 toward the inner edge 31 </ b> A.

  A circular through hole 53 is formed at the position of the heel portion 5 of the support substrate 3, and a disk-shaped heel support plate 7 is fitted into the through hole 53 and joined to the top sheet 4. The heel support plate 7 is for supporting the heel of the foot, and an elastic material made of the same material as the back sheet 8 described later is used as the heel support plate 7. Since the heel support substrate 7 is compressed and deformed in the through hole 53 along the shape of the heel by the load of the foot, the heel is stably supported while being fitted in the through hole 53.

On the back surface of the top sheet 4, a region other than the region where the support substrate 3 is affixed, that is, a region extending from the proximal phalanges 22b to 22e of the phalanges 21b to 21e of the second to fifth fingers to the toe A back sheet 8 made of a soft elastic material is attached to correspond to the portion 6. The elastic material is composed of a foamed material having a polyurethane resin composition, that is, a low resilience urethane foam, but is not limited thereto. The low resilience urethane foam has both elasticity and viscosity, and has a property of slowly restoring after compression.
As shown in FIG. 5, an elastic sheet material 9 made of the same material as the back sheet 8 is attached between the top sheet 4 and the back sheet 8 in a region corresponding to the phalange 21a of the thumb. A thick thick portion 90 is formed.

FIG. 6 (1) to FIG. 6 (3) show the mechanism of human walking. FIG. 6 (1) shows the floor contact period, FIG. 6 (2) shows the middle stance phase, and FIG. 6 (3) shows the bed leaving period.
When a person walks, the foot heel first lands (bed contact), and then the center of gravity on the heel is the bone head of the first finger metatarsal 26a from the bone head of the fifth finger metatarsal 26e. Move to the club and be in a stable position (mid stance). In correct walking, the ground contact point of the foot heel is slightly outside, and the center of gravity of the heel moves to the front foot while the entire surface of the heel contacts the inside from the outside. After that, in the form in which the middle foot phalanx joints 25a to 25e warp (dorsiflexion position), the floor surface is kicked up mainly using the bone head (finger ball) of the first metatarsal bone 26a as a fulcrum. Do (getting out of bed).

  When a foot is placed on the shoe insole 1 having the above-described configuration, the rear foot portion and the front foot portion are supported by the support substrate 3. When walking, the lower surface of the heel portion 5 of the support substrate 3 is first positioned outside. When the first flat region 51 to be grounded and then the center of gravity hung on the heel moves to the front foot portion, the second flat region 52 located inside the lower surface of the heel portion 5 becomes the first flat region 51. In contrast, because it is formed on an inclined surface with a predetermined inclination angle θ, the movement of the entire surface of the heel to touch the ground from the outside to the inside is supported, making it ideal for foot movement from the flooring period to the mid-stance phase It can be carried out. The stability of the body is maintained by landing the forefoot part in the middle of the stance from slightly inside to outside.

In walking after the middle stance, the middle foot phalangeal joint 25a of the thumb is depressed at the position of the notch 6, so that the dorsiflexion of the thumb portion, that is, the warping of the middle foot phalangeal joint 25a of the first finger is supported. Then, the floor surface is kicked up strongly and smoothly by the bone head of the metatarsal bone 26a of the first finger, and in conjunction with this, from each of the metatarsal joints 25b to 25e of the second to fifth fingers. Since the dorsiflexion of the phalanges 21b to 21e of the second finger to the fifth finger is also performed smoothly, the motion of the foot is ideally performed from the middle stance phase to the bed leaving phase. In particular, since the dorsiflexion function of the thumb portion during walking is further enhanced by the presence of the thick wall portion 90, the exercise during the bed leaving phase becomes smooth and the walking motion can be performed more smoothly.
As described above, by ideally exercising the foot from the bed contact stage to the bed leaving stage, it does not place an undue burden on each part of the foot, especially the stress on the plantar muscle is greatly improved, and the hallux valgus Achilles tendonitis does not cause damage, such as plantar aponeurosis or thumb fish eyes and heels.

It is a rear view which shows the external appearance of the shoe insole which is one Example of this invention. It is the top view which showed the external shape of the shoe insole with the skeleton of the foot. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the CC line of FIG. It is explanatory drawing which shows the mechanism of a walk.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shoe insole 3 Support substrate 4 Top sheet 6 Notch part 8 Back surface sheet 9 Elastic sheet material 25a Middle finger foot joint joint 31A Inner edge 31B Outer edge 31C Front edge 50 Boundary 51 1st flat area 52 2nd flat Area 90 Thick part c Center line

Claims (4)

In a shoe insole in which a support substrate made of a synthetic resin plate is pasted on the back surface of a flexible and flexible topsheet having an outer shape corresponding to the sole shape,
In the region corresponding to the ribs of the support substrate, a heel portion that protrudes toward the back surface is formed, and on the lower surface of the heel portion, a first flat region that is horizontal on the outer edge side, on the inner edge side. The second flat regions are respectively formed across the boundary along the length direction, and the second flat region is such that the height of the heel portion is lower on the inner edge side of the support substrate than on the boundary side. A shoe insole formed on an inclined surface having an inclination angle of 0.5 degrees or more and 3 degrees or less with respect to the first flat region.   The insole according to claim 1, wherein the boundary is located at a position deviated from the center line of the lower surface of the heel portion toward the inner edge.   The support substrate has a size and a shape corresponding to a region extending from the radius to the proximal phalanx of the phalange, and a cutout portion is provided in at least the region corresponding to the middle foot phalangeal joint of the phalange. The insole according to claim 1, wherein a back sheet made of an elastic material is pasted in a region where the support substrate on the back surface of the top sheet is not pasted.   The notch cuts a region corresponding to the metatarsal bone head of the first finger, the metatarsal joint of the first toe, and the proximal phalanx of the first finger phalange from the inner edge to the front edge of the support substrate. In addition to being formed by the lack, a thick part is formed partially by interposing a sheet material in a region corresponding to the phalange of the first finger between the top sheet and the back sheet. A shoe insole according to claim 3.

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