KR20190069804A - prosthetic foot - Google Patents

Abstract

The present invention relates to a prosthetic foot comprising: a front foot part corresponding to the tip of the foot; a rear foot part corresponding to the heel; and a foot-rolling support part having an upwardly convex arch shape, and allowing the front end thereof to press the front foot part while pressure is applied to the rear end thereof when the heel touches the ground during walking.

Description

Prosthetic foot

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a willing foot, and more particularly, to a willing foot capable of supporting stable walking by supporting a soles of a foot in a stance.

In general, a variety of assistive devices are being used to help move or restore movement so that disabled people with physical disabilities can live a basic life.

Especially for the unavoidable reason, the foot is used as an auxiliary device for the walking of the femur or the lower limb amputee. For the severely handicapped, the will foot supports a wide range of activities from the basic movement of everyday life to the movement of high momentum, and can simulate and reproduce the shape of the foot and ankle in general walking.

Specifically, the walking cycle simulating the will is divided into two phases: a stance phase while the foot touches the ground and a swing phase where the foot floats in the air.

If the swinging phase is the step of moving the foot forward from the air, the stance is a step of dispersing the load from the air to the ground to reduce the impact and moving the foot and knee at the ground by rotating. Forward movements of the elongate foot require balance between the joints of the spinal and hip joints, such as the hip joint, while the stance of the stance requires the flexibility and supportive capacity of the knee joint and ankle joint and foot.

By alternately repeating these stance and swinging movements with respect to both feet, the foot is forwarded from the ground to the air and from the air to the ground again.

In this case, the stance unit includes an initial stance / heel strike, a foot flat / loading response, a mid stance, a terminal stance, a pre- -Swing / Toe off). On the other hand, the swinging period can be divided into three stages: Intial swing, Mid swing, and Terminal swing.

In the stance phase, the initial stance / heel contact phase supports momentarily the weight of the foot and ankle. In order to control the collapse of the ankle, the ankle sequentially performs the remaining steps of the stance phase to convert the vertical moment into a rotation moment It will move forward while dispersing the impact. This process is called roll-over, and the dispersion of the shock is similar to that of induction.

Significant research and development has been made on the willingness to implement such walking. For example, development of functions, lightweight materials, modularization of parts, and mounting microprocessors for artificial intelligence have been developed.

Among them, the foot part made of carbon was developed in the improvement part of the material. Carbon has a feature of high durability at sustained bending moments and high energy return, making it a suitable material for the continuous operation of walking. The use of carbon footprint is steadily increasing, and it is likely that carbon will be applied to most feet in the near future.

However, since the production of the will of the foot using carbon is divided into several segments according to the size and weight of the foot, in this case, as many molds are required as the number of segments to be segmented and the manufacturing cost is increased, Thereby increasing the difficulty of purchasing. Therefore, despite the advantage that carbon footprint can be obtained from carbon, there is still a real barriers to popularization.

In addition, in the case of carbon foot, the forefoot corresponding to the toe and the forefoot corresponding to the heel are combined. The foot absorbs the shock when the foot touches the ground, and supports the forefing of the forefoot by absorbed energy do.

However, if a sufficient weight is not transmitted to the foot of the carbon foot in the heel-touching operation, the foot does not reach the foot well, and the foot phenomenon does not occur or occurs late during the stance. This breaks the cooperation with the opposite foot, There is a problem that it is stuck or hinders the straight-line walking.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the problems of the prior art as described above, and it is an object of the present invention to provide an apparatus and a method for controlling a foot, This is to provide a foot that enables the foot to be clouded.

Further, the present invention is to provide a footrest which can reduce the production cost by reducing the length of the front and rear parts as the combination of the forefoot part and the hind part is adjusted in stages.

According to one aspect of the present invention, a wrist rest comprises: a forefoot corresponding to a toe; A hind foot corresponding to the heel; And a pedal support portion having an upwardly convex arcuate shape and whose front end presses the forefoot portion while the rear end is pressed upon reaching the heel during walking.

Specifically, the foot support portion may be provided such that a front end thereof is in close contact with the forefoot portion, and a rear end portion thereof is adjacent to the rear foot portion.

Specifically, the foot rolling support portion may have a damper provided at a front end thereof to abut the forefoot portion.

Specifically, the forefoot portion may have a rear end coupled to the hind part and a plurality of toes at a front end thereof, and the damper may be provided in plurality so as to abut each of the plurality of toes.

Specifically, the forefoot portion may have a front end coupled to the forefoot portion and a plurality of heel portions provided at a rear end, and a rear end of the foot support portion may be provided between the plurality of heel portions.

Specifically, the support member may further include a support shaft provided at a central portion of the support portion.

Specifically, the body part may be provided at a position where the forefoot part and the forefoot part are coupled with each other.

Specifically, the body portion is at least open front and rear, and can accommodate the foot support portion inside.

Specifically, the body portion may constrain both ends of the support shaft.

Specifically, the forefoot portion and the forefoot portion may be downwardly convex arch-shaped.

Specifically, the hind part may be convex in a direction opposite to the foot rolling support part.

According to another aspect of the present invention, a wrist rest includes: a forefoot corresponding to a toe; And a rear foot corresponding to the heel, wherein a rear end of the forefoot part and a front end of the hind part are combined so that their overlapping areas are different from each other, and the front and rear lengths from the toe to the heel are variable.

Specifically, the forefoot part has a fore joint part connected to the hind part at the rear end, and has a plurality of toes at its front end. The hind part has a rear joint part to be coupled with the forefoot part at the front end, A heel portion may be provided.

Specifically, the toes and heel portions may be downwardly convex arch-shaped.

Specifically, the toe portion is provided such that the front end thereof is located beyond the vertex of the arch, and the heel portion is provided so that the rear end thereof is less than the vertex of the arch.

Specifically, the front engaging portion and the rear end engaging portion may overlap the forefoot portion and the forefoot portion while facing surfaces overlap each other.

Specifically, at least one of the front engaging portion and the rear engaging portion may have a fastening protrusion in a zigzag form in the front-back direction on the surfaces facing each other.

Specifically, the fastening protrusions may be formed so that the overlapping areas of the front engaging part and the rear fastening part are adjusted in stages.

The shoulder foot according to the present invention uses a foot support portion provided with a rear end on the heel portion and a front end on the forefoot portion so that the foot can be smoothly applied so that proper pressure is applied to the forefoot portion during the heel contact operation.

Also, the shoulder foot according to the present invention can adjust the longitudinal length through the stepwise combination of the forefoot portion and the hind foot portion, thereby reducing the production cost, thereby reducing the burden on the disabled and contributing to popularization.

1 is a perspective view of a wrist foot according to an embodiment of the present invention.
2 is a perspective view of a wrist foot according to an embodiment of the present invention.
3 is a perspective view of a wrist foot according to an embodiment of the present invention.
4 is a side view of a wrist foot according to an embodiment of the present invention.
5 is an exploded perspective view of a wrist foot according to an embodiment of the present invention.
FIG. 6 is a view showing the lengthwise and lengthwise adjustment of the foot of the foot according to an embodiment of the present invention.
FIG. 7 is a view showing a walking state of a willed foot according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The objects, particular advantages and novel features of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. It should be noted that, in the present specification, the reference numerals are added to the constituent elements of the drawings, and the same constituent elements are assigned the same number as much as possible even if they are displayed on different drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For the sake of reference, in this specification, the term "ground" refers to a surface to which a will is touched, and it is not necessarily referred to as "land".

FIG. 4 is a side view of a wrist part according to an embodiment of the present invention, and FIG. 5 is an exploded perspective view of a wrist part according to an embodiment of the present invention. FIG. to be.

FIG. 6 is a view showing a front-rear length adjustment of a will foot according to an embodiment of the present invention, and FIG. 7 is a view showing a walking view of a will foot according to an embodiment of the present invention.

1 to 7, a shoulder foot 1 according to an embodiment of the present invention includes a forefoot portion 10, a rear foot portion 20, a body portion 30, and a foot rolling support portion 40 .

The forefoot portion 10 forms a portion corresponding to the toe. The forefoot portion 10 may be made of a material having elasticity such as carbon or the like and may have a convex arch shape downward. At this time, the front end corresponding to the toe in the forefoot portion 10 may be provided so as to exceed the vertex of the arch. That is, the front end of the forefoot portion 10 has a shape bent upward.

The gait cycle implemented by the foot (1) is largely divided into a stance phase and an elongated phase, and the stance phase is divided into an initial stance / heel stance, a sole stance, an intermediate stance stage, a stance stance stage, The forefoot 10 corresponding to the tip of the toe comes close to the ground G from the soles of the foot, and then touches the ground G at the middle stance.

Then, when the front end of the forefoot portion 10 is pressed upward in the terminal stapes, the toe can be naturally released based on the elasticity generated due to the material and arch shape of the forefoot portion 10.

However, the forefoot portion of the forefoot portion 10 is pressed by the forefoot portion 10 when the forefoot portion 20 is received by the forearm. However, when a sufficient impact can not be transmitted to the hind part 20 from the reach of the heel, the front end of the forefoot part 10 may not be sufficiently pressed by the ground G, which may cause a problem of roll over.

However, according to the present invention, since the forefoot portion of the forefoot portion 10 is provided by the pressure transmitted from the foot support portion 40 in addition to the impact applied to the hind part 20, , Smooth foot cloud is possible.

The forefoot portion (10) has a plurality of toes (11) at the front end. At least two toes 11 may be provided and are spaced apart from each other. The reason that the toes 11 are not integrally provided but is divided into a plurality of pieces is to allow the forefoot of the forefoot 10 to be pressed more easily and to obtain sufficient elasticity to smoothly release the toes.

When the pair of toe portions 11 are formed as a pair, the pair of toe portions 11 may have the same shape or may have a symmetrical shape. For example, the pair of toes 11 may have a symmetrical form in which the front ends project further toward each other. In this case, the front end of the forefoot portion 10 may be convex toward the front.

Or the toe portion 11 may be formed asymmetrically in view of the position where the user uses the toe foot 1, that is, whether the toe foot 1 is located on the left side or the right side of the user. That is, the number and shape of the toe portions 11 are not particularly limited, and various modifications are possible.

The toe portion 11 is formed in a convex arch shape downward, and the front end of the toe portion 11 may be provided so as to extend beyond the vertex of the arch as described above. In this case, the portion of the toe 11 pressed by the ground G may be the vertex of the arch, which is located behind the front end of the toe 11, A sufficient elastic force for releasing the toe can be generated.

The forefoot portion 10 has a fore joint portion 12 to be joined to the hind part 20 at a rear end thereof. The fore joint part 12 may have a horizontal shape and a plurality of toes 11 may be connected to one fore joint part 12. That is, the toes 11 are spaced apart from each other, but can be indirectly connected through the fore joint part 12.

The forefoot joint part 12 can be engaged with the forefoot joint part 22 of the hind part 20 to be described later so that the forefoot part 10 and the hind part 20 can be engaged. And can be disposed on the lower side of the rear joining portion 22.

The front engaging portion 12 may be overlapped with the rear engaging portion 22 by a specific area so that the distance between the front end of the forefoot portion 10 and the rear end of the rear foot portion 20 becomes Can be varied. This will be described in detail in the process of describing the hindlimb 20.

The front engaging portion 12 may be provided with a fastening protrusion 121, and the fastening protrusion 121 may have a zigzag shape in a back and forth direction. That is, the fastening protrusion 121 may be in the form of a saw tooth. Of course, it is sufficient that a plurality of fastening protrusions 121 are provided in the forward and backward directions instead of the zigzag shape, and therefore the shape of the fastening protrusions 121 is not limited to that shown in the drawings.

The hind part 20 forms a part corresponding to the heel. The hind part 20 may be made of the same or similar material as the forefoot 10, such as carbon, and may have a convex arch shape downward. At this time, the rear end corresponding to the heel of the hind part 20 may be provided so as not to reach the vertex of the arch.

The arch shape of the hind part 20 may not be the same in the curvature radius or the convex direction when compared with the arch form of the forefoot part 10. [ For example, the radius of curvature of the arch of the hind part 20 may be smaller than the radius of curvature of the arch of the forefoot. This takes into account the shape of a person's toe and heel.

In other words, since the radius of curvature of the hindquarters 20 is smaller than the forefoot 10, the force required to bend the arch shape of the hindquarters 20 is greater than the forefoot 10, The elastic force generated by the hind part 20 may be greater than the forefoot part 10. [

Therefore, when the heel is touched before the toe, a strong pressure applied to the heel can be buffered by the hindle 20, and the walking can be realized by fully utilizing the force received by the hind part 20. [

The foot portion 20 corresponding to the heel is the portion first contacting the ground G from the shoulder foot 1 while walking, and touches the ground G when the heel of the stance reaches the heel. When the rear end of the hind part 20 is pressed upward, the steps of hitting the sole on the basis of the elasticity of the material of the hind part 20 or the arch shape and the subsequent steps can be sequentially performed.

In other words, the vertical moment applied to the hind part 20 when the heel is touched can be changed to the rotational moment so that the forefoot part 10 can be brought into contact with the ground surface G. Thereafter, ) Completely fall off from the ground G. Fig.

However, when sufficient pressure can not be applied to the hind part 20 corresponding to the heel, a sufficient rotational moment for causing the forefoot part 10 to touch the ground G may not be sufficiently generated, so that a proper walking may not be achieved. However, according to the present invention, it is possible to stably implement the foot cloud through the impact applied to the footrest 1 in the heel-touching process by placing the foot-rolling support portion 40 described below.

The hindle 20 has a plurality of heel portions 21 at the rear end. The heel portion 21 may be provided in at least two or more like the toe portions 11, and may have a shape separated from each other.

The heel portion 21 is not formed integrally with the toe portion 11 in a similar manner to the toe portion 11 but is divided into a plurality of portions so that the rear end of the forefoot portion 20 can be easily pressed and sufficiently elasticized, It is to be done naturally.

The heel portions 21 may be formed as a pair as shown in the figure, and the pair of heel portions 21 may have the same shape or a symmetrical shape. For example, according to the drawings, the heel portion 21 may be a symmetrical shape in which the rear ends are further protruded toward each other. In this case, the rear portion may have a convex shape toward the rear.

Or the heel portion 21 may be formed asymmetrically with respect to the position (left side or right side) where the user uses the notch foot 1 as described above with respect to the toe portion 11. [ That is, the heel portion 21 is not limited in number, shape or the like as in the case of the toe portion 11.

The heel portion 21 has a downward convex arch shape and the rear end of the heel portion 21 can be provided so as to be less than the vertex of the arch. In this case, the heel portion 21 is required to receive more force than the toe portion 11 to warp the arch shape, which means that effective shock absorption is possible.

The hind part 20 has a rear engagement part 22 which is connected to the forefoot part 10 at the front end. The rear joining portion 22 may have a horizontal shape with the ground G and a plurality of heel portions 21 may be connected to one rear joining portion 22. [ That is, the heel portions 21 spaced apart from each other are indirectly connected to each other through the rear joint portion 22, so that the hind part 20 can be integrally manufactured.

The rear connecting portion 22 may be formed so that the front surface of the forefoot portion 10 and the rear foot portion 20 are coupled with each other while the facing surfaces overlap each other. At this time, as the area where the rear joint portion 22 and the front joint portion 12 are overlapped with each other is adjusted, the front and rear lengths from the tip of the foot to the heel can be varied.

That is, the front engaging portion 12, which is the rear end of the forefoot portion 10, and the rear end engaging portion 22, which is the front end of the rear foot portion 20, Can be adjusted in the longitudinal direction. This will be described in detail with reference to FIG.

A fastening protrusion 221 (or a fastening groove) corresponding to the fastening protrusion 121 (or fastening groove) of the front engaging part 12 is formed on a surface of the rear fastening part 22 facing the front engaging part 12 . The fastening protrusions 121 of the front engaging part 12 and the fastening protrusions 221 of the rear engaging part 22 may be zigzag in the forward and backward directions as shown in the figure.

In this case, the overlapping areas of the rear joint part 22 and the front joint part 12 due to the engagement of the fastening protrusions 121 and 221 can be adjusted step by step, The shape, size, etc. of the substrate.

When the fastening protrusion 121 of the front engaging portion 12 is fully engaged with the fastening protrusion 221 of the rear engaging portion 22 as shown in Fig. 6 (A), the length of the shoulder foot 1 It can be the smallest. On the other hand, as shown in FIG. 6 (B), when a part of the fastening protrusion 121 of the front joint part 12 is engaged with the fastener protrusion 221 of the rear joint part 22, The longitudinal length can be somewhat extended.

In the case of FIG. 6 (C), the front and rear lengths of the foot 1 are further extended than in FIG. 6 (B). The front and rear lengths between the front end of the forefoot part 10 and the rear end of the rear foot part 20 are adjusted as the overlapping area between the fore joint part 12 and the rear joint part 22 is reduced. It can be made within a range that ensures that the hind part 20 is stably fastened.

The length of the shoulder foot 1 can be sufficiently extended while minimizing the overlapping area of the front engaging portion 12 and the rear engaging portion 22 but in this case the engaging force between the forefoot portion 10 and the rear foot portion 20 is weakened So walking can not be done properly. Therefore, the overlapping area of the front engaging portion 12 and the rear engaging portion 22 is such that at least the forefoot portion 10 and the rear foot portion 20 are stably fastened to the body portion 30 to be described later, Lt; / RTI >

As described above, according to the present invention, the engagement of the zigzag-shaped fastening protrusions 121 and 221 provided on the front engaging portion 12 and the rear engaging portion 22 is adjusted to form the shoulder foot 1 ) Can be adjusted, and the longitudinal length can be variable, for example, from 5 to 30 mm. Of course, since the size of the zigzag box can be varied, the variability of the longitudinal length is not limited to the above values.

That is, according to the present invention, when the forefoot portion 10 and the rear foot portion 20 are made of a single frame using carbon to make the front and rear lengths of the legged foot 1 variable, The convenience and accessibility of the user can be improved.

However, since the adjustment of the length is not necessary and the rigid coupling force is important once the user has been determined, the engagement of the fastening protrusions 121 and 221 is adjusted and then the fastening protrusions 121, and 221, the front engaging portion 12 and the rear engaging portion 22 can be firmly fixed.

The body portion 30 is provided at a position where the forefoot portion 10 and the hind part 20 are engaged. The body portion 30 may be configured to fasten the front engaging portion 12 and the rear engaging portion 22 to each other and fasteners 122 and 222 formed on the front engaging portion 12 and the rear engaging portion 22 (And / or a fixing screw or the like) which passes through the fixing pins 31 at once.

The fixing pin 31 penetrates through the fore joint part 12 and the rear joint part 22 in the lower part of the body part 30 in order and then penetrates the crutch support part 40. The fixing pin 31 is inserted into the inside of the body part 30 So that the forefoot portion 10 and the forefoot portion 20 can be firmly fixed.

However, the fixing pin 31 may be detachably provided for adjusting the length of the shoulder foot 1, but the coupling force of the fixing pin 31 may not be released due to vibration or impact .

The body portion 30 may be connected to the lower end of a cut leg or a leg portion (not shown) provided on the lower leg of the user, and the connection structure or the manner of the body portion 30 and the artificial leg portion is not particularly limited .

The body portion 30 may have a rectangular parallelepiped shape that is open at least front and rear, and may have a relatively flat shape having a longitudinal length greater than a height. The body portion 30 can be connected to the rear engaging portion 22 (or the front engaging portion 22), because the rear engaging portion 22 can be fastened above the front engaging portion 12 as described above (For example, the base 12).

At this time, the body 30 may be provided integrally with the rear coupling part 22. [ The body portion 30 may be included in a part of the hind part 20 instead of being provided separately from the hind part 20 in the case where the hind part 20 includes the body part 30. [ .

However, the body portion 30 does not need elasticity because it is not a part that needs to utilize the impact upon walking. Therefore, the body portion 30 may be made of a material other than carbon, which is not elastic (unlike the forefoot portion 20 and the forefoot portion 20, which can be made of carbon). However, the body portion 30 may be made of carbon or a similar material for weight saving.

The body portion 30 can receive the swing support portion 40 and the swing support portion 40 can protrude to the front and rear of the body portion 30. [ The fixation pin 31 may be provided in the foot support portion 40 so that the fixation pin 31 can be fixed to the body portion 30, It is also possible to use various fastening methods in addition to the fixing through the front engaging portion 12 and the rear engaging portion 22. [

When the back support is pressed while the heel is in contact with the foot support portion 40, the front support pushes the forefoot portion 10. To this end, the foot support portion 40 may be provided such that the front end thereof is in close contact with the forefoot portion 10 and the rear end thereof is adjacent to the rear foot portion 20.

Specifically, the foot support portion 40 can be provided so that the rear end thereof can be located in a gap where the pair of heel portions 21 are spaced apart from each other and can not interfere with the heel portion 21. [ In this case, the rear end of the heel portion 21 can be pressed while the rear end of the heel support portion 40 can be also pressed.

However, the foot support portion 40 has an upwardly convex arch shape. That is, the pawl support portion 40 may have a convex shape in a direction opposite to that of the hind part 20 (which is not limited to a complete 180 degree opposite).

In this case, the rear foot portion 20 generates some elasticity to bounce upward when the rear end is pressed, while the pressure applied to the rear end of the foot support portion 40 can be mostly used for downward rotation of the front end.

When the rear end of the foot support portion 40 is pressed against the ground G because the front end of the foot support portion 40 touches the forefoot portion 10, a rotational moment is generated at the front end of the foot support portion 40, (10) can be sufficiently rotated toward the paper surface (G).

That is, the foot support unit 40 pushes the forefoot portion 10 downward toward the ground G by implementing the downward rotation of the front end through the pressing of the rear end when the heel touches the stance unit, so that it can support the soles of the foot.

Thus, even if the rotational support portion 40 does not transmit a sufficient rotational moment from the forefoot portion 20 to the forefoot portion 10, the foot support portion 40 can prevent the foot from reaching the heel, .

Therefore, the foot support unit 40 can reliably perform the foot rolling phenomenon in the stance, so that it is possible to solve all of the problems that the walking support is obstructed or the walking straightness is obstructed.

The rear end of the foot support portion 40 may be positioned forward of the rear end of the heel portion 21. When the heel portion 21 is slightly pressed when the ground G is horizontal, (G) and can be pressed. This may be to allow the foot to be naturally hit after the impact is absorbed from the heel to the hind part 20.

The rear end of the foot support portion 40 may be provided between the pair of heel portions 21. The rear end of the foot support portion 40 may protrude downward from the heel portion 21 . However, the rear end of the foot support portion 40 may have a tapered shape so as to be inclined rearward and downward, in order to prevent the protruding rear end of the foot support portion 40 from being caught by the obstacle.

The forehead of the foot support portion 40 is provided to press the forefoot portion 10 from above. The foot support portion 40 may be provided to press the plurality of foot portions 11, respectively. At this time, a damper 42 that comes into contact with the toe 11 may be provided at the front end of the foot support portion 40.

The damper 42 may be made of a compressible material such as urethane, resin, silicone, rubber, or the like, and may have a cylindrical shape as shown in the drawings. The damper 42 may be provided in plurality so as to abut each of the plurality of toes 11.

However, the front end of the volar support portion 40 provided with the damper 42 may not be divided into a plurality of portions unlike the toe portion 11. This is to ensure that the pressure applied by the rear end of the volar support portion 40 when the heel is in contact is sufficiently transmitted to each toe portion 11 through the integral front end of the volar support portion 40.

The position where the foot support portion 40 presses the toe portion 11 through the damper 42 may be a position close to the fore joint portion 12 at the toe portion 11. [ In the case where the damper 42 is provided at a position adjacent to the front end of the toe 11, the foot support 40 may cause the sole to touch the foot too quickly, which may cause the user to be pushed forward. Of course, the position at which the damper 42 presses the toe 11 is not limited to that shown in the drawings, and may be determined as an optimal position for the convenience of the user.

The damper 42 may also have a function of absorbing the impact of the terminal striking member pressed against the ground G and dispersing the shock absorption of the supporting shaft 43 out of the striking members.

The pedal crutch support portion 40 is provided with a support shaft 43 so that the pedal crutch support portion 40 can effectively press the forefoot portion 10. [ The support shaft 43 may be provided at the lower portion (and / or upper side) of the center portion of the crutch support portion 40 so that the crutch support portion 40 can implement the leverage function, 31 may be provided at a position where they do not interfere with the fixing pin 31 when passing through the foot support portion 40.

The support shaft 43 may be provided on the inner side of the body portion 30 and both ends thereof may be engaged with the shaft engagement portion 33 provided on the body portion 30 to be restrained. In this case, when the rear end is pressed upward, the pedal support part 40 generates a rotation moment with respect to the front end of the pedal support part 40 with respect to the support shaft 43 and presses the forefoot part 10 with a stable and appropriate force Pressure can be delivered.

The position and size (sectional diameter) of the support shaft 43 or the arch shape (elasticity) of the foot support portion 40 can be variously changed according to the weight of the user. For example, a user with a high weight can quickly reach the soles and disperse the vertical impulse amount less. In contrast, a user with a low weight may have a late sunrise due to a delay in reaching the soles.

The present invention can reproduce efficient foot clouds by artificially adjusting the time of foot contact which may be different depending on the weight of the user through the foot support unit 40 as described above.

As described above, according to the present invention, it is possible to adjust the longitudinal length of the wrist 1 by adjusting the joint between the forefoot portion 10 and the hind part 20, It is possible to smoothly implement the pedal crest of the striking body which has been in trouble, thereby improving the walking stability and comfort.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the same is by way of illustration and example only and is not to be construed as limiting the present invention. It is obvious that the modification and the modification are possible.

It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

1: Will foot 10: forefoot
11: toe portion 12:
121: fastening protrusion 122: fastening hole
20: Hip foot 21: Heel part
22: rear end coupling portion 221: fastening projection
222: fastener 30: body portion
31: fixing pin 32: fixing member
33: shaft coupling port 40:
41: fastener 42: damper
43: Support shaft G: Ground

Claims (15)

A forefoot corresponding to the toes;
A hind foot corresponding to the heel; And
And a foot rolling support portion having a convex upward arch shape and a front end pressing the forefoot portion while the rear end is pressed when the heel touches the heel during walking. [2] The apparatus according to claim 1,
Wherein a front end is brought into close contact with the forefoot portion and a rear end is provided adjacent to the rear foot portion. [2] The apparatus according to claim 1,
And a damper provided at a front end to abut the forefoot portion. The method of claim 3,
Wherein the forefoot portion has a rear end coupled to the hind part and a plurality of toes at a front end thereof,
Wherein the damper is provided in plurality so as to abut on each of the plurality of toe portions. The method according to claim 1,
The hind part has a front end joined to the forefoot part and a plurality of heel parts provided at a rear end,
And a rear end of the foot rolling support portion is provided between the plurality of heel portions. The method according to claim 1,
Further comprising a support shaft provided at a central portion of the foot rolling support portion. The method according to claim 6,
Further comprising a body portion provided at a position where the forefoot portion and the forefoot portion are coupled with each other. [8] The apparatus of claim 7,
Wherein at least the front and rear portions are opened and the foot rolling support portion is housed inside,
And restrains both ends of the support shaft. 2. The ankle joint according to claim 1,
Characterized in that it is a downward convex arch shape. [2] The method according to claim 1,
And is convex in a direction opposite to the foot rolling support portion. A forefoot corresponding to the toes; And
Having a hind foot corresponding to the heel,
Wherein a rear end of the forefoot part and a front end of the hind part are combined so that their overlapping areas are different from each other, and the front and rear lengths from the toe to the heel are variable. 12. The method of claim 11,
Wherein the forefoot part has a fore joint part coupled to the hind part at a rear end thereof, a plurality of toes at a front end thereof,
Characterized in that the hind part has a rear connecting part to be engaged with the forefoot part at the front end and a plurality of heel parts at the rear end. 13. The apparatus according to claim 12, wherein the toe portion and the heel portion comprise:
Characterized in that it is a downward convex arch shape. [14] The apparatus of claim 12, wherein the front engaging portion and the rear end engaging portion comprise:
So that the forefoot portion and the forefoot portion are engaged with each other. [14] The method of claim 12, wherein at least one of the front engaging portion and the rear end engaging portion comprises:
The fastening protrusions being zigzag-shaped in the front-rear direction on the surfaces facing each other,
Wherein an overlapping area of the front engaging part and the rear end engaging part is adjusted in a stepwise manner.

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