JP4076555B2 - 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.

  Conventionally, shoe insoles have been used for the purpose of improving comfort such as laying on the inner bottom surface of shoes or sandals to improve air permeability. In addition to these types of insoles, the insoles for health promotion that provide protrusions on the surface to stimulate the soles, and the correction and treatment that correct the clubfoot and clubfoot by tilting the surface. For example, insoles for shoes have been proposed.

  In general, the movements of each part of the body are divided into three main body planes: a sagittal plane that divides the body into left and right bodies, a frontal plane that divides the front and back bodies, and an upper and lower body It is divided into horizontal planes. For example, there are insoles for correction and treatment that have a slope that increases the inside or outside of the buttocks, and that that slopes from the little finger of the forefoot to the thumb. This is a method for controlling distortion of the buttocks and the forefoot as seen from the frontal face (see, for example, Patent Document 1). Moreover, in order to control the distortion of the foot seen from the sagittal plane of the foot, a method such as adjusting the height of the buttocks relative to the forefoot is also used.

Japanese Patent No. 3239334

  By the way, as for the mechanism of human walking, firstly, the foot heel is landed (the floor contact period), and then the center of gravity applied to the buttock moves to the front foot, and the first metastasis from the bone head of the fifth metatarsal. It moves to the bone head of the metatarsal bone and is in a stable standing position (mid stance phase), and then the bone head of the first metatarsal bone mainly in the form that the metatarsal phalanx joint is warped (dorsiflexion) ( The floor is kicked up using the thumb ball as a fulcrum to get out of bed (leaving period). By performing ideal walking along this walking mechanism, the burden on each part of the body is reduced, and the occurrence of various obstacles can be prevented.

  However, especially for people who have difficulty in bending the thumb due to short gastrocnemius and soleus muscles and stiff foot joints, the dorsiflexion of the thumb is difficult and difficult to perform during the above-mentioned bed leaving period. This may place an excessive burden on the floor muscles and may cause problems such as hallux valgus, Achilles tendonitis, plantar aponeurosis and thumb fish eyes and heels. Such a technical problem may not be solved only by the above-described conventional shoe insole that controls the distortion of the foot viewed from the frontal plane or sagittal plane of the foot.

  The present invention has been made paying attention to the above-described problems, and an object of the present invention is to provide a shoe insole that can prevent the occurrence of various kinds of foot disorders by supporting natural and ideal walking movements. .

The shoe insole according to the invention, the support substrate on the back surface of the surface sheet flexible from the heel bone to correspond to the region extending to the proximal phalanx of the finger bones made of plastic plate in which formed by stuck. The support substrate is formed to have a thickness that can bend from the bone head of the metatarsal bone to the proximal phalanx of the phalange, and to a thickness that does not flex the other regions, A notch is formed in the support substrate by cutting out a region corresponding to the bone head of the first metatarsal bone, the metatarsal joint of the thumb, and the proximal phalanx of the first phalanx from the inner edge to the front edge. Has been. On the back surface of the top sheet, a top cover made of a sheet-like elastic material is pasted in a region other than the region where the support substrate is pasted, and in a region corresponding to the first phalange on the inner surface of the top cover, A thick-walled portion is partially formed by sticking the elastic material .

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. However, the thumb metatarsal joint of the thumb sinks at the position of the notch, so that the back of the thumb portion. Bending, that is, warping of the first metatarsal joint is supported and the floor of the first metatarsal bone is kicked up strongly and smoothly by the bone head. In conjunction with this, the dorsiflexion of the second to fourth phalanges is smoothly performed from the second to fourth metatarsal joints. 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 does not cause damage such as hallux valgus, Achilles tendinitis, plantar aponeurosis or thumb fish eyes and heels . In particular, since the dorsiflexion function of the thumb portion during walking is further enhanced by the presence of the thick-walled portion, the exercise during the bed leaving period becomes smooth and the walking exercise can be performed more smoothly.

  In the above-described configuration of the present invention, the “surface sheet” is formed in a shape corresponding to the outer shape of the inner bottom surface of the shoe using artificial leather or the like. It is not limited.

  According to the present invention, a natural and ideal walking motion can be supported. As a result, it is possible to prevent an excessive burden on each part of the foot, especially the stress on the plantar muscles is greatly improved, and the occurrence of valgus valgus, Achilles tendonitis, plantar aponeurosis and thumb fish eyes and heels Can be prevented.

FIG. 1 shows an outer shape (indicated by a one-dot chain line) of a shoe insole 1 as an example together with a skeleton of a foot 20. 2 shows an appearance of the shoe insole 1 viewed from the back side, and FIG. 3 shows an appearance of the shoe insole 1 viewed from the side. 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 shoe insole 1 in the illustrated example is obtained by attaching a non-flexible support substrate 3 to the back surface of a flexible soft top sheet 2. The topsheet 2 of this embodiment is formed in a shape along the outer shape of the inner bottom of the shoe with artificial leather, but the material of the topsheet 2 is not limited as long as it is flexible and can be flexed appropriately under load. .

The support substrate 3 includes a rear substrate 30 formed in a size and a shape corresponding to a region from the ribs 27 of the foot 20 to the first to fifth metatarsals 26a to 26e, and the first to fifth metatarsal feet. The front substrate 31 is formed in a size and shape corresponding to the region from the bones 26a to 26e to the proximal phalanges 22a to 22e of the first to fifth phalanges 21a to 21e. The support substrate 3 is formed by connecting the rear end edge 31C of the front substrate 31 on the front end edge 30B.
In this embodiment, the rear substrate 30 is formed of a hard plastic plate, and the front substrate 31 is formed using an ethylene-vinyl acetate copolymer (EVA). As long as it does not exist, the material of the rear substrate 30 and the front substrate 31 does not matter.

The front edge 31B of the front substrate 31 is located on the proximal phalanges 22b to 22e of the second to fifth phalanges 21b to 21e, and the distal phalanges 23b to 23e of the second to fifth phalanges 21b to 21e and the middle The phalanges 24b to 24e protrude from the front edge 31B of the front substrate 31. A top cover 9 made of a soft, sheet-like elastic material is attached to a notch portion 6 to be described later on the back surface of the top sheet 2 and a region from the proximal phalanges 22a to 22e to the toes.
Further, an anti-slip plate 4 having a large number of notches 5 for anti-slip is formed on the surface of the buttock on the rear substrate 30.

A cutout portion 6 is formed in a region of the support substrate 3 corresponding to the thumb midfoot phalanx joint 25a.
In this embodiment, the notch 6 includes the front head 31 of the support base 3 extending from the inner edge 31A to the front edge 31B of the first metatarsal 26a, the thumb metatarsal joint 25a, and the first metatarsal joint 25a. The region corresponding to the proximal phalanx 22a of the phalange 21a is formed by cutting out, and when the foot is placed on the insole 1, as shown in FIG. It is going to sink. In FIG. 1, reference numerals 25b to 25e denote second to fifth metatarsal joints.

As shown in FIG. 4, the front substrate 31 of the support substrate 3 is formed on an inclined surface 7 whose upper surface is inclined downward from the inside to the outside. The inclined surface 7 is used to correct the forefoot portion against varus and valgus. Here, the “outside” of the “inclined surface 7 inclined downward from the inside to the outside” means that when standing with both feet aligned, the left foot is opposite to the right foot, the right foot is opposite to the left foot, Each means. Accordingly, the shoe insole on the left foot side has an inclined surface that is higher on the right foot side and lower on the opposite side to the right foot, while the shoe insole on the right foot side has an inclined surface that is higher on the left foot side and lower on the opposite side of the left foot. Incidentally, the side on which the left and right feet are opposed is “inside” with respect to the above “outside”.
Since the notch 6 is on the high position side of the inclined surface 7, a step is generated at the position of the notch 6, and the top sheet 2 receives a foot load and bends downward as indicated by a one-dot chain line in the figure. The midfoot phalanx joint 25a of the thumb sinks into the notch 6.

  Although the cutout portion 6 of this embodiment is in a hollow state, as shown in FIG. 5, the back surface of the top cover 9 is formed by fitting the second support substrate 8 made of a flexible elastic material into the cutout portion 6. You may stick to. 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 slow restoring property after compression. When a foot load is applied to the second support substrate 8, the second support substrate 8 is compressed and deformed in the notch portion 6 as shown by a one-dot chain line in the drawing, so that the thumb metatarsal joint 25 a is notched. Sink into part 6.

6 to 8 show another embodiment of the shoe insole 1, and FIG. 6 shows the outer shape of the shoe insole 1 (indicated by a one-dot chain line) together with the skeleton structure of the foot 20. FIG. 7 shows an appearance of the shoe insole 1 viewed from the back side, and FIG. 8 shows an appearance of the shoe insole 1 viewed from the side.
The support substrate 3 of this embodiment is also composed of a rear substrate 30 and a front substrate 31. The materials of the rear substrate 30 and the front substrate 31 are the same as those in the first embodiment. Further, a top cover 9 made of a soft, sheet-like elastic material is attached to a region from the proximal phalanges 22 a to 22 e on the back surface of the top sheet 2 to the toes, and further, a slippage is placed on the buttocks on the rear substrate 30. A stop plate 4 is attached.

The support substrate 3 of this embodiment includes a notch 6 formed by notching the inner edge 31A in a region corresponding to the middle foot joint joint 25a of the thumb of the front substrate 31. When the foot is placed on the insole 1, as shown in FIG. 8, the face sheet 2 is bent and the thumb metatarsal joint 25 a of the thumb sinks into the notch 6.
As shown in FIG. 9, the front substrate 31 is formed on an inclined surface 11 whose upper surface is inclined downward from the inside to the outside. Since the notch 6 is on the high position side of the inclined surface 11, a step is generated at the position of the notch 6, and the top sheet 2 receives the load of the foot and bends downward as indicated by a dashed line in the figure. The midfoot phalanx joint 25a of the thumb sinks into the notch 6.

  Although the notch 6 of this embodiment is in a hollow state, as shown in FIG. 10, the back surface of the topsheet 2 is fitted so that the second support substrate 8 made of a flexible elastic material is fitted into the notch 6. You may stick to. As the elastic material, a foamed material having a polyurethane resin composition, that is, a low resilience urethane foam is used, and when a foot load is applied to the second support substrate 8, as indicated by a one-dot chain line in the figure. Since the second support substrate 8 is compressed and deformed in the notch 6, the thumb metatarsal joint 25 a sinks into the notch 6.

11 and 12 show an embodiment of a shoe insole 1 according to the present invention . In FIG. 11, the outer shape (indicated by a one-dot chain line) of the shoe insole 1 is shown together with the skeleton structure of the foot 20. FIG. 12 shows the appearance of the insole 1 viewed from the back side.
In the illustrated insole 1, a support substrate 3 is pasted on the back surface of a flexible top sheet 2 having flexibility. The surface sheet 2 is formed of a flexible material such as artificial leather and has a shape along the outer shape of the inner bottom surface of the shoe.

The support substrate 3 is formed in a size and shape corresponding to a region from the ribs 27 of the foot 20 to the proximal phalanges 22b to 22e of the second to fifth phalanges 21b to 21e. A notch 6 is formed in a region corresponding to the middle foot phalanx joint 25a.
In this embodiment, the notch 6 includes the base of the first metatarsal bone 26a, the thumb metatarsal joint 25a, and the first phalange 21a from the inner edge 31A to the front edge 31B. The region corresponding to the bone 22a is formed by notching, and when the foot is placed on the shoe insole 1, the thumb metatarsal joint 25a of the thumb sinks.

  In this embodiment, the support substrate 3 is formed of a hard plastic plate, and from the bone heads of the second to fifth metatarsals 26b to 26e to the proximal phalanges 22b to 22b of the second to fifth fat bones 21b to 21e. The region S corresponding to 22e 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 a load is applied.

On the back surface of the top sheet 2, a region other than the region where the support substrate 3 is pasted, that is, a region extending from the proximal phalanges 22 b to 22 e of the second to fifth phalanges 21 b to 21 e to the toe and a notch 6. A top cover 9 made of a soft, sheet-like elastic material is attached. 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.
As shown in FIG. 13, a sheet-like elastic material 12 made of the same material as the top cover 9 is attached to the inner surface of the top cover 9 in a region corresponding to the phalange 21a of the thumb. A meat part 15 is formed.

  A circular through hole 13 is formed at the collar portion of the support substrate 3, and a disk-shaped collar support plate 14 is fitted into the through hole 13 and joined to the surface sheet 2. The heel support plate 14 is for supporting the heel of the foot, and an elastic material made of the same material as the top cover 9 is used as the heel support plate 14. Since the heel support substrate 14 is compressed and deformed in the through hole 13 along the shape of the heel by the load of the foot, the heel is stably supported in a state of being fitted in the through hole 13.

  When a foot is placed on the shoe insole 1 having the above-described structure, the thumb metatarsal joint 25a of the thumb sinks at the position of the cutout portion 6 of the support substrate 3, so that the thumb portion is bent back, that is, the first middle foot. The warp of the phalangeal joint 25a is supported, and the kicking of the floor surface by the bone head of the first metatarsal 26a is performed powerfully and smoothly. In particular, in the third embodiment having the thick wall portion 15, the presence of the thick wall portion 15 further enhances the dorsiflexion function of the thumb portion during walking. It can be performed more smoothly. In conjunction with this, dorsiflexion of the second to fourth phalanges 21b to 21d from the second to fourth metatarsal joints 25b to 25d is also performed smoothly. 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, an unreasonable burden is not applied to each part of the foot, and damage such as hallux valgus, Achilles tendonitis, Achilles tendonitis, plantar aponeurosis and thumb fish eyes and heels are not caused.

It is the top view which showed the external shape of the shoe insole which is an Example with the frame | skeleton of a leg | foot. It is a rear view of the Example of FIG. It is a side view of the Example of FIG. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the AA line of FIG. 1 in another Example. It is the top view which showed the external shape of the other Example with the frame | skeleton of the leg | foot. It is a rear view of the Example of FIG. It is a side view of the Example of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which follows the BB line of FIG. 6 in another Example. It is the top view which showed the external shape of the Example of the shoe insole of this invention with the frame | skeleton of the leg | foot. It is a rear view of the Example of FIG. It is sectional drawing which follows the CC line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shoe insole 2 Surface sheet 3 Support board 6 Notch part 8 2nd support board 9 Top cover 12 Elastic material 15 Thick part 20 Foot 25a Thumb metatarsophalangeal joint 30 Rear board 31 Front board

Claims (1)

Flexible with the calcaneus on the back surface of the top sheet so as to correspond to a region extending to the proximal phalanx of the finger bones become is the supporting substrate made of a plastic plate stuck, the supporting substrate, from the bone head of the metatarsals The region corresponding to the phalanx of the phalange is formed with a thickness that can bend, and the other regions are formed with a thickness that does not bend, and the support substrate is formed from the inner edge to the front edge, A notch is formed by notching a region corresponding to the bone head of the first metatarsal bone, the metatarsal joint of the thumb, and the proximal phalanx of the first phalange, and on the back surface of the top sheet, A top cover made of a sheet-like elastic material is affixed to an area other than the area where the support substrate is affixed, and a sheet-like elastic material is affixed to the area corresponding to the first phalange on the inner surface of the top cover. partially in shoe thickness is formed by thick-walled portion is formed by .

Images