JP2005279293A - Footwear sole to reduce load on knee and footwear using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a footwear sole which has a structure to reduce a load on the knee during walking and enables a user to walk while reducing a load on the knee, and to provide footwear using the footwear sole. <P>SOLUTION: This footwear sole is equipped with a foot sole support body 12 with flexibility, and grounding body 11 to support the center part 12b except the front part 12a and the rear part 12c of the foot sole support body 12. The footwear sole is made so that a first plane 21 including the rear end 12s and the rear end 12r of the center part is at an angle α of ≥20° with respect to the floor face 20 and a second plane 22 including the rear end 12r of the center part and the front end 12q of the center part is at an angle smaller than the angle α with respect to the floor face 20 in a condition the grounding body 11 is contacted on a flat floor face 20 and the rear end 12s of the foot sole support body 12 is most lowered by pressing the center part 12b and the rear part 12c of the foot sole support body 12 from the upper side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to the structure of the bottom of footwear useful for reducing the burden on the user's knee, and further to footwear, such as slippers, sandals, shoes, provided with this bottom.

  As it is said that “aging comes from the knee”, one of the typical problems of the elderly is a knee defect. Many people suffer from knee pain due to increased burden on the knee due to obesity. Many people receive treatments such as manipulative treatment and acupuncture to alleviate knee pain. The biggest problem caused by knee pain is walking. Even if he refrains from going out, he has to move indoors, so at least indoors, he wants to walk with his knee pain alleviated.

  Except for walking aids such as walking sticks, the only tool used for walking is footwear. However, until now, it has been difficult to say that sufficient attempts have been made to improve footwear in order to reduce the burden on the knees. This is probably because, as exemplified below, elderly people who do not feel pain in their knees to the extent that conventional footwear is intended for healthy people or even if they are intended for elderly people. This is because it has been designed as a target.

  Patent Document 1 discloses a shoe sole in which a front inclined surface and a rear inclined surface form a V-shape. According to Patent Document 1, when this shoe sole is used, surface landing and surface kicking are possible, so that a green bamboo stepping effect, a high heel effect, and the like can be obtained even with light walking.

  The shoe sole disclosed in Patent Document 1 does not facilitate walking of people who have pain in the knees. If you wear shoes with this sole attached, the user's posture will be greatly inclined forward when the ground contact surface is shifted from the rear inclined surface to the front inclined surface, and the burden on the knee will be excessive and excessive. .

  Patent Document 2 discloses footwear having a thick bottom from a toe to an arch as footwear for a “health diet”. This footwear is designed for the purpose of increasing exercise effects such as jogging and the like, and a healthy person is assumed as a user in the same manner as the footwear disclosed in Patent Document 1.

  In the footwear disclosed in Patent Document 2, the toe side is lifted higher than the heel side by disposing a thick sole on the toe side. In this footwear, the toe side has an angle of 1 to 25 degrees with respect to the ground (floor surface). However, in a so-called reverse heel shoe in which the toe side is higher than the heel side, in general, if the heel is increased and the inclination is made steep, the ease of walking is impaired. In particular, when the toe side has an angle of 20 degrees or more with respect to the floor surface, in the reverse heel shoe disclosed in Patent Document 2, it becomes even difficult to keep the upright posture stably.

  Patent Document 3 discloses a reverse heel shoe designed for elderly people. In this shoe, the width of the toe box in the vicinity of the toe side end is made larger than the width of the ball joint on the heel side, and the toe spring at the toe side end is made higher so that the heel cup on the heel side of the shoe It has a structure in which the inclination is inclined in the toe direction. According to Patent Document 3, when an inverted heel shoe is worn, the ankle joint is slightly dorsiflexed during walking. Therefore, the elderly have advantages such as improved support, ease of walking, increased walking ability, and improved posture. Is brought about. The shoe disclosed in Patent Document 3 facilitates the toe opening / closing movement by adjusting the width of the shoe.

As disclosed in Patent Document 3, when the heel portion of the shoe is tilted toward the front toe side, the user's knee is positioned in front of the ankle, and the knee is bent and stands. For this reason, the burden of a user's knee is not relieved. The shoe disclosed in Patent Document 3 is useful for correcting the posture specific to an elderly person whose upper body is bent forward, but is not suitable for a user who has pain in the knee. Also in the reverse heel shoe disclosed in Patent Document 3, if the toe side has an angle of 20 degrees or more with respect to the ground, it becomes difficult to stand upright.
JP 11-285401 A JP 2004-16797 A JP-A-5-277001

  As described above, various improvements have been proposed for the bottom of footwear. However, at present, the bottom of footwear suitable for walking of a user having pain in the knee is not yet known. In view of such circumstances, the present invention has a structure for reducing the burden on the knees during walking, and the bottom of the footwear that enables walking while reducing the burden on the knee, and further uses the bottom of the footwear. The purpose is to provide footwear.

  The present invention comprises a flexible foot support, and a grounding body that supports a center portion excluding a front part on the toe side and a rear part on the heel side of the foot support, and has a flat floor surface. In the state where the rear end of the sole support is lowered most by pressing the center part and the rear part of the sole support from above to bring the grounding body into contact with the ground support. And the first plane including the rear end of the central portion has a predetermined angle of 20 degrees or more with respect to the flat floor surface, and includes the rear end of the central portion and the front end of the central portion. A bottom of the footwear is provided, wherein a second plane has an angle smaller than the predetermined angle with respect to the flat floor surface.

  The present invention further provides footwear comprising the footwear bottom of the present invention and an upper portion covering a part of the footwear upper portion.

  In the bottom of the footwear of the present invention, the center portion is lifted high so that the first plane including the rear end of the sole support and the rear end of the center portion has a sufficiently large angle with respect to the floor surface. Since the muscles on the back of the person's legs, particularly the calf muscles, are stretched and tense, the burden on the knee is relatively light. In addition, in the bottom of the footwear of the present invention, the second plane has a smaller angle with respect to the floor surface than the first plane. Despite having, the user can easily stand upright and walk.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  1 to 3 show a slipper as an example of the footwear of the present invention. The slipper 1 includes a bottom part (sole) 10 including a grounding body 11 and a sole support 12, an insole part (inner) 13 disposed on the sole support 12, a sole support 12 and an insole part 13. And an upper part (upper) 14 that covers a part of the upper part of the upper part.

  The grounding body 11 has a rectangular parallelepiped shape, is in contact with the floor surface 20 at the grounding surface 11a, and supports a part of the foot support 12 at a supporting surface 11b substantially parallel to the grounding surface 11a. In the present specification, in the sole support 12, the portion 12 b supported by the grounding body 11 is the central portion, the toe-side portion 12 a that is held from the central portion 12 b is the front portion, and the heel ( The heel side portion 12c is referred to as a rear portion. Further, hereinafter, the toe side is referred to as the front, and the heel side is referred to as the rear.

  In the slipper 1, the grounding body 11 and the sole support 12 are fixed by two nails 51 and 52. The nails 51 and 52 are driven from above the insole portion 13, and their tips penetrate the insole portion 13 and the sole support 12 to reach the grounding body 11, and these members 11, 12, and 13 are integrated. . When walking, a large force is applied in the vicinity of the rear end 12r of the central portion, so that one nail 52 penetrates the sole support 12 in the vicinity of the rear end 12r. In order to ensure the fixing, the nail 52 is driven with an inclination so that the tip thereof is positioned slightly forward. However, the integration method is not limited to nails, and a spiral, an adhesive, or the like may be used.

  The sole support 12 has flexibility (a property that can bend) together with the insole portion 13, and when pressed from above, bends downward at the front portion 12 a and the rear portion 12 c. The grounding body 11 is made of a material harder than the sole support 12, for example, synthetic resin or wood.

  FIG. 4 shows a state in which the center portion 12b and the rear portion 12c of the sole support are pressed from above and the rear end 12s is brought into contact with the floor surface 20. This state assumes that a person (user) stands upright wearing the slipper 1. In an upright state, since the weight applied to the front portion 12a is small, there is no problem even assuming that only the center portion 12b and the rear portion 12c are pressed from above.

  In the state shown in FIG. 4, the rear part 12 c of the sole support body is directed downward (approaching the floor surface 20) as it proceeds rearward from the rear end 12 r of the center part 12 b lifted by the grounding body 11, and The floor 12 is in contact with the end 12s. In this state, assuming a plane (first plane) 21 including the rear end 12s of the sole support and the rear end 12r of the central portion, the first plane 21 is inclined by an angle α with respect to the floor surface 20. Yes. The angle α is set to be 20 degrees or more.

  A person's ankle is said to bend up to about 20 degrees. When the upward bending (dorsiflexion) of the ankle is about 20 degrees or more, the muscles on the back side of the foot from the ankle to the hip joint, particularly the calf muscle, become tense. Such muscle tension on the posterior side of the foot reduces the burden on the knee and, as a result, relieves knee pain. When this effect needs to be increased, the angle α may be set to exceed 25 degrees.

  However, simply increasing the angle α makes it difficult to stand stably and makes it difficult to obtain the effect of reducing the burden on the knee. For this reason, the center part 12b of the sole support body is set so that the angle with respect to the floor surface 20 becomes smaller than the rear part 12c, in other words, the inclination with respect to the floor surface 20 becomes smaller. More specifically, the plane (second plane) 22 set so as to include the front end 12q and the rear end 12r at the center is substantially 0 degrees with respect to the floor surface 20, that is, with respect to the floor surface 20. Are substantially parallel. The central part 12b provides a support surface for the user to stand stably.

  In the state shown in FIG. 4, that is, in the state where the center portion 12 b and the rear portion 12 c of the sole support are pressed, the front end 12 p of the sole support is located above the second plane 22. More specifically, a part of the front portion 12a of the sole support body is located below the second plane 22, but the vicinity of the front end 12p is deformed slightly upward and located above the second plane 22. . The local upward warping in the vicinity of the front portion 12p is important for securing a feeling of walking.

  However, if the front portion 12a of the sole support is further pressed from above in this state (FIG. 4) and the front end 12p of the sole support is lowered to the lowest, the front portion 12a is bent and the front end 12p is It will be located below the second plane 22.

The length of the front portion 12a of the sole support along the longitudinal direction of the slipper 1 is L ₁ , the length of the rear portion 12c along the longitudinal direction is L ₂ , and the length of the grounding body 11 at the front end 12q of the center portion. When the height from the floor surface 20 is H ₁ and the height from the floor surface 20 of the grounding body 11 at the rear end 12r in the center is H ₂ , the lengths L ₁ and L ₂ are the heights H ₁ and H ₂ , respectively. It is preferable that it is larger than ₂ (L ₁ > H ₁ , L ₂ > H ₂ ). When this relationship is established, when the front part 12a and the rear part 12c are pressed from above the sole support 12, the front end 12p and the rear end 12s of the sole support both come into contact with the floor surface 20, Stable walking is possible.

  In the bottom of a conventional reverse heel shoe (for example, Patent Document 3), as shown in FIG. 5, the angle α ′ at which the grounding body 111 supports the sole support 112 is constant regardless of the part of the sole support. It was. For this reason, if the reverse heel increases to such an extent that the angle α ′ is 20 degrees or more, it becomes difficult for the user to stand stably. On the other hand, in the slipper 1, a support surface for standing stably at the central portion 12b of the sole support is set while giving the user the effect of the reverse heel structure at the rear portion 12c of the sole support. Yes. However, even in the slipper 1 employing this structure, if the angle α is too large, it becomes difficult for the user to stand stably. From such a viewpoint, the angle α is preferably 45 degrees or less, particularly 40 degrees or less.

  When the rear portion 12c of the sole support is further strongly pressed from above and bent backward 12c from the state shown in FIG. 4, the rear end 12s of the sole support approaches the grounding body 11 slightly. The angle α may be slightly increased. Although the difference in the angle α due to this is very slight, for the sake of accuracy, in this specification, as the value of the angle α, the minimum value that can be taken in the state where the rear end 12s of the sole support is lowered is adopted. I will do it.

  As shown in FIG. 6, when the position of the sole support 12 is displayed along the longitudinal direction of the sole support 12 with the rear end 12s of the sole support being 0 and the front end 12p being 100, The rear end 12r of the part is preferably in the range of 30 to less than 60 and 35 to 55, and the front end q is preferably in the range of 60 to 90, particularly 65 to 85. When the rear end 12r and the front end 12q are within the above ranges, it becomes easy to maintain a good walking feeling while reducing the burden on the knee.

  When displayed according to the above, if the rear end 12r of the central portion is in the range of 35 to 50, the user's arch vicinity is stimulated and the user can walk comfortably. In addition, when the front end 12r of the central portion is in the range of 65 to 80, the downward bending of the ribs of the foot becomes free and it becomes easier to walk.

Height H ₂ of the grounding member may be set such that the angle α has a value of more than 20 degrees, for example, 3 cm or more, particularly more than 4cm, and may be a two. The height H ₁ of the grounding body is preferably the same as H ₂ , but it is not necessarily the same.

  With reference to FIG. 6, the preferable length of the center part 12b of a sole support body is demonstrated. If the central portion 12b is extremely short, the user is not likely to stand upright stably. In consideration of this, the difference obtained by subtracting the value of the position of the front end 12q from the value of the position of the rear end 12r in the center, which is displayed with the rear end 12s of the sole support as 0 and the front end 12p as 100, is 10 Above, especially 15 or more is preferable.

  7A to 7C show the slipper 1 in a state worn by the user 30. When the user 30 stands upright (FIG. 7A), the weight of the user 30 substantially depends on the rear part 12c and the center part 12b of the sole support. In this state, the muscle 31 on the back side of the user's foot, more specifically, the muscle of the calf portion from the knee to the ankle, is tense, thereby relatively reducing the burden on the knee. Since the user 30 can put weight on the center portion 12 of the sole support, the user 30 can stand upright stably even though the ankle 32 is bent back.

  When the user 30 puts his / her weight forward to start walking (FIG. 7B), the rear end 12s of the sole support moves away from the floor surface 20 and moves upward, and the front end 12p moves downward. . When the user 30 puts his / her weight further forward (FIG. 7C), a part of the grounding surface 11a of the grounding body 11 is separated from the floor surface 20, and the vicinity of the front end 12p of the sole support is in contact with the floor surface 20. Become.

  As shown in FIGS. 7A to 7C, during walking, the front portion 12a and the rear portion 12c of the sole support body are greatly bent downward depending on how the user's weight is applied. In the case of the sole support 12 in which the central portion 12b is lifted by the grounding body 11, if the sole support 12 is not flexible, the user cannot smoothly move the weight accompanying walking. The slipper 1 has no such inconvenience. On the other hand, the central portion 12b is supported by the hard grounding body 11 and firmly supports the weight of the user 30. The flexibility of the front part 12a and the rear part 12c and the inflexibility of the center part 12b play an important role in improving walking feeling.

  In actual walking, it is not necessary to put the weight forward to the extent shown in FIG. In the posture shown in FIG. 7C, it is easy to put a burden on the knee, so that the other foot is stepped forward from the posture shown in FIG. Walking back to is rather suitable for users with painful knees.

  FIG. 8 shows another example of a slipper to which the present invention is applied. The slipper 2 also includes a grounding body 25, a sole support 12, an insole 13, and an instep 14. ) And the sole support 12. The grounding body 25 is different from the grounding body 11 in that the grounding surface 25a and the support surface 25b are both curved surfaces. Thus, the grounding body is not limited to a rectangular parallelepiped, and may have various shapes.

  In the slipper 2, the second plane 22 has an angle β with respect to the floor surface 20. The second plane 22 may not be parallel to the floor surface 20 (β ≠ 0), but the angle β is set to be smaller than the angle α formed by the first plane 21 and the floor surface 20 ( α> β). In order to stably support the sole of the foot, the angle β is preferably 15 degrees or less, particularly 10 degrees or less.

  The present invention is not limited to slippers, and can be applied to various footwear including sandals and various shoes. Also when applying to sandals etc., it is good to use the sole support which has flexibility. Flexibility should just be provided in the front part 12a and the rear part 12c which need a deformation | transformation with walking, and the degree of flexibility took the assumed user's weight (for example, 60 kg). It only has to be able to bend at times. The sole support is not limited to the illustrated shape, and may be designed in a shape corresponding to the type of footwear. The bottom of the footwear of the present invention may have members other than those shown in the figure. For example, when applied to men's shoes or women's shoes, a heel may be attached to the back side of the rear end of the sole support. Good.

  It is desirable that the upper part has a structure that does not greatly limit the bending of the sole support body during walking. For footwear where the upper is placed so as not to surround the entire side of the sole support, such as slippers or sandals (footwear placed only above the front portion of the sole support) However, it does not greatly limit the deformation of the sole support. However, in footwear in which the upper part is placed so as to surround the entire side part of the sole support, such as general men's shoes and women's shoes, the upper part inhibits the appropriate deformation of the sole support. The sole support cannot be deformed to reach the state shown in FIGS. 7A to 7B and further to FIG. 7C. In order to prevent this, for example, at least a part of the upper part may be formed of a stretchable material so that the upper part follows the operation of bending the front part and the rear part of the sole support with respect to the central part. .

  As described above, the bottom of the footwear of the present invention has great utility value in the technical field as it assists walking of a person who has pain in the knee.

It is a perspective view of an example of footwear of the present invention. It is the perspective view from another angle of the footwear shown in FIG. It is a side view of the footwear shown in FIG. It is a side view which shows the state which changed the footwear shown in FIG. It is a side view which shows the structure of the bottom of the conventional footwear which has a reverse heel structure. It is a side view for demonstrating the display of the position of a sole support body. It is a side view which shows the use condition of the footwear shown in FIG. It is a side view which shows the use condition of the footwear shown in FIG. 1 with FIG. 7A. It is a side view which shows the use condition of the footwear shown in FIG. 1 with FIG. 7A and B. It is a side view of another example of the footwear of this invention.

Explanation of symbols

1, 2 Slipper 10 Footwear bottom 11, 25, 111 Grounding bodies 11a, 25a Grounding surfaces 11b, 25b Support surfaces 12, 112 Foot support 12a Front part 12b Center part 12c Rear part 12p Front end 12q of sole support Center front end 12r Center rear end 12s Foot support rear end 13 Insole 14 Back 20 Floor 21 First plane 22 Second plane 30 User 31 Muscle on the back side of foot 32 Ankle 51, 52 nail

Claims (12)

A sole support having flexibility, and a grounding body that supports a center portion excluding a front portion on a toe side and a rear portion on a heel side of the sole support,
In a state where the grounding body is brought into contact with a flat floor surface, the central portion and the rear portion of the sole support are pressed from above, and the rear end of the sole support is lowered most.
A first plane including a rear end of the sole support and a rear end of the central portion has a predetermined angle of 20 degrees or more with respect to the flat floor surface;
A bottom of footwear, wherein a second plane including a rear end of the central portion and a front end of the central portion has an angle smaller than the predetermined angle with respect to the flat floor surface.   The footwear bottom according to claim 1, wherein the predetermined angle is 45 degrees or less.   The bottom of footwear according to claim 1 or 2, wherein the predetermined angle exceeds 25 degrees.   The bottom of footwear according to any one of claims 1 to 3, wherein the second plane has an angle of 15 degrees or less with respect to the flat floor surface.   The footwear bottom according to claim 4, wherein the second plane is substantially parallel to the flat floor surface.   The front end of the sole support is positioned below the second plane in a state where the front portion is further pressed from above in the state to lower the front end of the sole support most. The bottom of footwear according to any one of -5.   When the rear end of the sole support is 0 and the front end of the sole support is 100, when the position of the sole support is displayed along the longitudinal direction of the sole support, The bottom of the footwear according to any one of claims 1 to 6, wherein a rear end of the shoe is in a range of 30 or more and less than 60.   When the rear end of the sole support is 0 and the front end of the sole support is 100, when the position of the sole support is displayed along the longitudinal direction of the sole support, The footwear bottom according to any one of claims 1 to 7, wherein the front end of the shoe is in the range of 60 to 90. The length of the front part along the longitudinal direction of the sole support body is L ₁ , the length of the rear part along the longitudinal direction is L ₂ , and the floor surface of the grounding body at the front end of the center part H ₁ and the height from _the height from the floor surface of the tread at the rear end of the central portion when viewing H _2, and, L _{1> H 1,} and L _2> H ₂ is satisfied The bottom of the footwear according to any one of claims 1 to 8. The central portion of the height H ₂ of the tread at the rear end, the bottom of the footwear according to any one of claims 1-9 is 3cm or more.   The footwear bottom according to any one of claims 1 to 10, wherein the grounding body is made of a material harder than the sole support.   The footwear provided with the bottom of the footwear of any one of Claims 1-11, and the upper part which covers at least one part of the bottom of the said footwear.

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