JP2006198087A - Sole of footwear and footwear - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sole which facilitates walking, prevents a wearer from getting tired, and is especially suitable for footwear with high heels. <P>SOLUTION: The sole employs a soft material in regions corresponding to a metatarsophalangeal joint 11, and a great toe part 12 and a rigid material in regions 2, 3 corresponding to the outside of the great toe part 12 and a region 8 in the back of a region 1 made of the soft material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an outsole of footwear in which hard and soft materials are combined so as to be easily walked, and footwear provided with the outsole.

  The ease of walking of the footwear depends on the flexibility of the part corresponding to the middle foot phalanx joint part, but for example, in the footwear described in Patent Document 1, a soft material is applied to the part corresponding to the heel part of the insole, A hard material is used for the portion corresponding to the second to fifth buttocks to improve the mobility.

  In addition, in the bottom of the footwear described in Patent Document 2, the toe is easily bent by combining the hard material and the soft material in two upper and lower layers.

Furthermore, in the footwear described in Patent Document 3, a substantially L-shaped groove is extended from the base part of the second heel part along the base part of the fifth heel part on the bottom surface, and further on the front edge of the arch on the bottom surface. By providing a laterally extending groove for forming a stable area at the corresponding site, the flexibility of the forefoot is improved.
JP 02-114904 A No. 02-23126 Notohei 05-4724

  The movement of the middle foot joint joint during walking is mildly dorsiflexion when touching the heel, intermediate position when touching the sole, and maximum dorsiflexion when crossing the foot. Do not footwear is ideal.

  Some sports shoes use soft materials for the whole or part of the sole so that the middle foot joint joints of the sole can bend easily. For example, a heel with a height of 3 cm or more is provided. It is not found in footwear with high heels such as women's pump shoes (hereinafter referred to as pumps). This is because the aesthetic appearance is prioritized over the functionality that the bottom-foot metatarsal joint joint is easily bent.

  Conventionally, footwear with high heels, such as pumps, has not been designed to bend easily by flexing the middle foot phalanx joint, but it is meant to be part of fashion, Since it is difficult to bend the metatarsal joint joint part, it has been used in various situations, causing problems such as heels coming out and poor ability to transmit exercise force, resulting in fatigue.

  The present invention was devised in view of the above circumstances, and an object of the present invention is to provide an outsole that is easy to walk and less fatigue, and that is particularly effective when applied to footwear with high heel, and footwear having the outsole. is there.

In order to achieve the above-mentioned object, the first invention uses a soft material having good flexibility in the portions corresponding to the middle foot joint joint portion 11 and the heel portion 12 and corresponds to the outside of the heel portion 12. It is the sole of the footwear characterized by using a hard material for each of the parts 2, 3 and the part 8 that is behind the part 1 made of a soft material. Also, the second invention is the first invention, Bending guide grooves 4, 5, 6, and 7 are provided in the portion 1 made of a soft material so that the middle foot joint joint portion 11 is assisted and guided in the physiological bending direction during walking.

  In addition, the third invention is characterized in that, in the first or second invention, the decompression portion 1a is provided in a portion corresponding to the second metatarsal head 13 and the third metatarsal head 14.

  According to a fourth aspect of the present invention, there is provided footwear comprising the bottom of any one of the first to third aspects of the invention.

  The fifth invention is characterized in that, in the fourth invention, the height of the heel is 3 cm or more.

  According to the bottom of the present invention, by using a soft material for the portions corresponding to the middle foot joint joint portion 11 and the heel portion 12, the middle foot joint portion 11 and the heel portion 12 are easily bent. The transmission efficiency of the main body bending force, which is the main driving force during walking, is good. Further, by using a hard material for the portions 2 and 3 corresponding to the outside of the heel part 12, it is possible to converge the side sway during walking to the center. Therefore, even if the walking speed is increased, it is easy to walk and less fatigue.

  Further, by providing the bending guide grooves 4, 5, 6, and 7 in the portion 1 made of a soft material so that the middle foot joint joint portion 11 is assisted and guided in the physiological bending direction during walking, The joint portion 11 is easily bent and the transmission efficiency of the walking propulsion force is improved, so that the energy efficiency is improved, and even if the walking speed is increased, the walking becomes easier and less fatigued. Moreover, since the part 1 made of a soft material is easily bent, the heel is difficult to take off during walking.

  In addition, by providing the decompression unit 1a at a portion corresponding to the second metatarsal head 13 and the third metatarsal head 14, the pressure as a reaction from the ground against the weight load is applied to the second metatarsal head 13 and Since it does not concentrate on the third metatarsal head 14, it is difficult to generate wrinkles, and it is possible to improve wrinkles that have already occurred by using conventional footwear for a long period of time, and to reduce the pain associated therewith Can do.

  In addition, footwear having the structural features as described above does not hinder the physiological movement of the foot during walking, and is easy to walk even when the walking speed increases, and is less fatigued.

  Such an effect is particularly remarkable in footwear having a heel height of 3 cm or more.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. FIG. 1 is a bottom view of the sole (for left foot) of a shoe according to the first embodiment of the present invention, and FIG. 2 is an explanatory view of the function and effect of the first embodiment. FIG. 3 is a diagram showing the positional relationship between the bottom of FIG. 1 and the skeleton of the left foot, and FIG. 4 is a perspective view of the pump using the bottom of FIG.

  According to FIG. 2, at the normal walking speed, the locus of the center of pressure (Center Of Pressure, hereinafter referred to as COP) is from the heel to the foot as indicated by the arrow 9 until the foot touches and steps on. The trajectory of the COP gradually converges toward the center as the walking speed increases as it passes through the outside of the head and crosses the foot width from the outside to the inside and moves to the tip of the toe portion 12, and the walking speed increases. become that way.

  Energy efficient walking means that the range of movement of the center of gravity at a height of about 55% of the height from the bottom of the foot vertically upward is small, and the COP trajectory moves laterally at the foot. Is achieved by converging toward the center. For this reason, when the walking speed increases, the COP changes in the direction of the arrow 10 in order to improve the energy efficiency. Therefore, the muscles of the lower limbs increase the muscle load and increase the fatigue level than the normal walking speed.

  Furthermore, when the outer side of the bottom is a soft material or worn, it is difficult to converge around the COP locus, so that the muscle load on the lower limbs is further increased and the degree of fatigue is increased.

  Therefore, by using a hard material for the outer part of the forefoot part to suppress the side swaying of the COP at the time of crossing, the COP trajectory is converged to the center part side, and energy efficient walking when the walking speed increases. Can be obtained.

  Further, at the time of crossing, the rear side of the middle foot joint joint portion 11 is not grounded, and the bottom flexion force of the heel portion 12 is the driving force of walking among the grounded front feet. With reference to FIG. 3, if the portions corresponding to the middle foot phalanx joint portion 11 and the main heel portion 12 which are the bent portions at this time are easily bent, the motion transmission efficiency is good. By using a soft material for the portion corresponding to the hull portion 12, it is possible to satisfactorily transmit the hull bending force for performing the crossing.

  In order to obtain the above effects, as shown in FIGS. 1 to 3, the portion 1 (hereinafter referred to as the soft portion) made of the soft material is made of a soft material having a hardness of about 65 to 75, and the midfoot phalanx In order to facilitate the bending of the joint portion 11 and the buttock portion 12, the shape is made substantially L-shaped to cover the range. The surface may be embossed to prevent slipping.

  The soft part 1 is provided with a proximal metatarsophalangeal joint bending guide groove 4 and a distal metatarsal joint flexing induction groove 5 having a depth of about 0.5 to 1 mm. Assist in bending. In addition, a proximal torsion bending guide groove 6 and a distal toe bending induction groove 7 having a depth of about 0.5 to 1 mm are provided to assist the bending of the toe portion 12.

  The outer portion of the main body 12, that is, the anti-slip portion 2 and the outer portion 3 (hereinafter referred to as the outer hard portion) are made of a hard material having a hardness of about 75 to 85, and the COP during walking does not flow outward. To converge toward the center side. For the purpose of preventing slipping during walking, the anti-slip portion 2 is preferably provided with a protrusion pattern having a thickness of about 0.5 to 1 mm. Further, the same hard material as that of the anti-slip portion 2 is used for a portion 8 (hereinafter referred to as a rear hard portion) behind the soft portion 1.

  The material of the soft part 1, the non-slip part 2, the outer hard part 3, and the rear hard part 8 may be a material usually used for the sole of shoes, such as rubber and foamed latex.

  It is preferable in terms of strength and appearance that the soft portion 1, the anti-slip portion 2, the outer hard portion 3, and the rear hard portion 8 are integrally formed.

  The bottom of the present invention is plate-like and has a uniform thickness, preferably about 3 to 5 mm for pumps and about 5 to 15 mm for women's casual shoes or men's shoes.

  As shown in FIG. 3, the pump shown in FIG. 4 includes a proximal metatarsal joint flexion inducing groove 4 and a distal metatarsal joint flexing inducing groove 5 in the bottom. Since the foot is sandwiched and the proximal fold bending guide groove 6 and the distal fold bending guide groove 7 are set at the position of the heel portion 12, the size of the bottom is also appropriate according to the size of the footwear. It is necessary to increase or decrease.

  When walking with this pump, the proximal metatarsophalangeal joint bending guide groove 4 and the distal metatarsophalangeal joint bending guiding groove 5 on the bottom bottom sandwich the metatarsophalangeal joint portion 11, It assists the bending of the metatarsal phalanx joint portion 11 and also guides the bending of the heel portion 12 by the proximal fold bending guide groove 6 and the distal fold bending guide groove 7.

  Next, a second embodiment of the present invention will be described. FIG. 5 is a bottom view of the sole (for the left foot) of the shoe according to the second embodiment, and FIG. 6 is a diagram showing the positional relationship between the pressure-removal portion provided on the sole of FIG. 5 and the skeleton of the left foot.

  As shown in FIG. 5, in the present embodiment, the depth corresponding to the second metatarsal head 13 (see FIG. 6) and the third metatarsal head 14 (see FIG. 6) is about 1 to 3 mm deep. A hollow pressure-reducing part 1a is provided.

  For example, if the hip is higher than the forefoot, such as pumps, the weight load concentrates on the forefoot and the lateral arch that holds the foot skeleton disappears, so it is not in the form of bone that originally receives weight Since pressure concentrates on the second metatarsal head 13 and the third metatarsal head 14, there is a problem that wrinkles are generated at the site as a biological defense reaction, pain is generated, and walking becomes difficult.

  For this reason, in the second metatarsal head 13 and the third metatarsal head 14, in order not to concentrate the pressure as a reaction from the ground with respect to the weight load, the pressure removing portion 1a is provided so as not to contact the ground. When the pressure is removed, not only is it difficult to generate wrinkles, but also the wrinkles that have already occurred by using conventional footwear for a long time can be improved, and the pain associated therewith can be reduced.

  In the above-described embodiment, the case has been described by taking an example of the bottom and footwear having a sharp tip, but the tip may be rounded or the tip may be any shape such as a wide tip. The present invention can also be applied. In addition, various modifications can be made to the above embodiment without departing from the gist of the present invention.

It is a bottom view of the sole (for left foot) of the shoes which are the 1st embodiment of the present invention. It is explanatory drawing of the effect of 1st Embodiment, and is the COP locus | trajectory at the time of the frame | skeleton and direction seen from the bottom face of the left foot. It is a figure which shows the positional relationship of the base of FIG. 1, and the skeleton of a left foot. It is the perspective view seen from the slanting lower part of the pump using the bottom of FIG. It is a bottom view of the bottom (for left foot) of the shoes which are the 2nd embodiment of the present invention. It is a figure which shows the positional relationship of the decompression part provided in the bottom of FIG. 5, and the skeleton of a left foot.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Soft part 1a Pressure reduction part 2 Anti-slip part 3 Outer hard part 4 Proximal metatarsal joint joint bending induction groove 5 Distal metatarsal joint articulation induction groove 6 Proximal tibial bending induction groove 7 Distal thigh Bending guide groove 8 Back rigid part 11 Metatarsal joint joint part 12 Mother hip part 13 Second metatarsal head 14 Third metatarsal head

Claims (5)

  The soft material was used for the part corresponding to the middle foot joint joint and the buttock, and the hard material was used for the part corresponding to the outside of the buttock and the part made of the soft material. The sole of the featured footwear.   The sole of the footwear according to claim 1, wherein a bending induction groove is provided in the portion made of the soft material so that the middle foot joint joint is guided in a physiological bending direction during walking.   The sole of the footwear according to claim 1 or 2, wherein a decompression portion is provided at a portion corresponding to the second metatarsal head and the third metatarsal head.   A footwear comprising the outsole according to any one of claims 1 to 3. The footwear according to claim 4, wherein the height of the heel is 3 cm or more.

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