TW201706018A - Lower limb exercise assisting device - Google Patents

Abstract

To simplify a structure and reduce cost and weight. A rotating body is provided on a base so as to be rotatable around a vertical axis. A left-leg recess and a right-leg recess which open upward are provided on the upper surface of the rotating body. The rotating body is driven by an electric motor provided in the base so as to reciprocatingly rotate at a predetermined rotational angle.

Description

Lower limb exercise assist device Field of invention

The present invention relates to a lower limb exercise assisting device, and more particularly to a continuous passive (actuated) sporty lower limb exercise assisting device.

Background of the invention

The proposal has a lower limb exercise assisting device, which is mainly used as a continuous passive motion (CPM) lower limb exercise assisting device for performing knee flexion and extension exercises, and includes: abutment; left and right sliding members, which are parallel to each other and can move back and forth in the front and rear direction. Disposed on one of the planes of the base plate; the driving device drives the left and right sliding members back and forth in the front-rear direction; and the left and right foot devices have a foot for placing the user and at least prevents the user's heel from being rearward Moving the heel accommodating portion and being mounted to be rotatable about an axis: at a position corresponding to the heel accommodating portion, an axis extending horizontally in the left-right direction of each of the sliding members; or being placed on the heel with the heel The ankle joint of the foot of the set portion is approximately in the same position, and the axis of each of the sliders extends horizontally in the left-right direction (for example, Patent Documents 1 and 2).

Prior technical literature Patent literature

Patent Document 1: Japanese Patent Office, Patent No. 5475838

Patent Document 2: Japanese Patent Office, Patent No. 5509396

Summary of invention

In the lower limb motion assisting device as described above, the driving source for driving the slider back and forth in the front-rear direction is an electric motor, so that the rotational output of the electric motor needs to be converted into a back and forth movement of the slider, so that the mechanism becomes complicated and the cost is complicated. As you increase, the weight of the device also becomes heavier.

The problem to be solved by the present invention is to achieve simplification of construction, cost reduction, and weight reduction.

The lower limb motion assisting device of the present invention comprises: a base (12); a rotating body (14) disposed on the base (12) and rotatable about a vertical axis; and an open left recess (20) and The right-foot recessed portion (22) is formed at a position separated from the upper surface of the rotating body (14), and has a wall (20B, 22B) for preventing the user's heel from moving rearward, and preventing the user's foot from being inward and outward. The laterally moving inner side walls (20D, 22D) and the outer side walls (20E, 22E); and the driving device (30) are disposed on the base station (12) to rotate the rotating body (14) back and forth at a predetermined rotation angle drive.

With this configuration, since it is not necessary to convert the rotational output of the electric motor (30) into a mechanism for the back and forth movement of the slider, simplification of the structure, cost reduction, and weight reduction can be achieved.

The left leg recess (20) and the right leg recess (22) of the present invention are located on a diameter line passing through the center of rotation of the rotating body (14), and are symmetrically arranged with the rotation center as a point of symmetry. .

With this configuration, the flexion motion of the knee joint can be equally performed in the left and right legs.

The outer side wall of the left leg recess (20) and the right leg recess (22) of the present invention has a wall height of the toe side (21B, 23B) lower than the wall height of the heel side (21A, 21B).

According to this configuration, the left-foot recessed portion (20) and the right-foot recessed portion (22) form a toe-facing clearance portion (24, 26) on the toe side, and the left-foot recessed portion 20 and the right-foot recessed portion. When moving on the circular path, the toes move inward and the toe on the "inner eight" side will naturally be located in the clearance portion (24, 26) to avoid the burden of twisting the knee joint.

According to the lower limb motion assisting device of the present invention, since the mechanism for converting the rotational output of the electric motor into the back and forth movement of the slider is not required, simplification of the structure, cost reduction, and weight reduction can be achieved.

10‧‧‧ Lower limb exercise assist device

12‧‧‧Abutment

14‧‧‧ rotating body

16‧‧‧rails

18‧‧‧ balls

20‧‧‧The recess for the left foot

20A‧‧‧ bottom wall

20B‧‧‧Back wall

20C‧‧‧ front wall

20D‧‧‧ inner side wall

20E‧‧‧Outer side wall

21A‧‧‧ heel side

21B‧‧‧Toe side

22‧‧‧The recess for the right foot

22A‧‧‧ bottom wall

22B‧‧‧Back wall

22C‧‧‧ front wall

22D‧‧‧ inner side wall

22E‧‧‧Outer side wall

23A‧‧‧ heel side

23B‧‧‧Toe side

24‧‧‧ clearance

26‧‧‧ clearance

28‧‧‧ center axis

30‧‧‧Electric motor

32‧‧‧ Output shaft

34‧‧‧Drive pulley

36‧‧‧driven pulley

38‧‧‧ drive belt

40‧‧‧ Controller

50‧‧‧Abutment side mounting plate

52‧‧‧Electric motor

54‧‧‧ Output shaft

56‧‧‧ worm

58‧‧‧Axis

60‧‧‧ worm gear

62‧‧‧Axis

64‧‧‧ Large diameter gear

66‧‧‧ Small diameter gear

68‧‧‧ Guide pin

70‧‧‧Guide substrate

72‧‧‧Rotary body side mounting plate

74‧‧‧ long hole

76‧‧‧Installation pin

78‧‧‧ sector gear

θ a‧‧‧ rotation angle

θ b‧‧‧ rotation angle

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view showing an embodiment of a lower limb exercise assisting device of the present invention.

Fig. 2 is a perspective view of the lower limb exercise assisting device of the embodiment.

Figure 3 is a cross-sectional view taken along line III-III of Figure 1.

4(A) to 4(C) are plan views showing an operation state of the lower limb exercise assisting device of the present embodiment.

Fig. 5 is a perspective view showing essential parts of another embodiment of the lower limb motion assisting device of the present invention.

Fig. 6 is a perspective view showing a main part of a lower limb exercising assisting device according to another embodiment (a state in which a rotating body side mounting plate is removed).

Form for implementing the invention

Hereinafter, an embodiment of the lower limb exercise assisting device of the present invention will be described with reference to Figs. 1 to 4 .

The lower limb exercise assisting device 10 has a disk-shaped base 12 placed on the floor, and a disk-shaped rotating body 14 provided on the base 12 and rotatable about a vertical axis.

An annular guide rail 16 concentric with the center of rotation of the rotating body 14 is formed on the lower surface of the rotating body 14. The guide rail 16 protrudes downward from the lower surface of the rotating body 14, and also serves as a reinforcing rib of the rotating body 14. The base 12 is provided with a rotatable metal ball 18 that is rotatably engaged with the guide rail 16 and rotatably supports the rotary body 14.

The left leg recess 20 and the right leg recess 22 are formed on the upper surface of the rotating body 14 at positions separated from each other in the left-right direction. The separation dimension of the left-foot recessed portion 20 and the right-foot recessed portion 22 in the left-right direction is almost equivalent to the left-right spacing of the left and right feet of the user. The separation dimension (distance) may be a center point pitch of about 340 mm to 400 mm in the left-right direction of the left-foot recessed portion 20 and the right-foot recessed portion 22.

More specifically, the left leg recess 20 and the right leg recess 22 are slightly rectangular grooves in a plan view of the upper opening, and are located in the rotation through the rotating body 14. a diameter line of the center of the rotation, and is symmetrically arranged with the center of rotation of the rotating body 14 as a symmetrical point, each having: a flat bottom wall 20A, 22A; a rear wall 20B, 22B, and a lower edge connecting the bottom wall 20A, 22A The trailing edge prevents the user's heel from moving backward; the front wall 20C, 22C, the lower edge connects the front edge of the bottom wall 20A, 22A and can be placed on the user's sole; the inner side wall 20D, 22D, the lower edge connects the bottom wall 20A, 22A The inner edge prevents the user's foot from moving inward; and the outer side walls 20E, 22E, the lower edge connects the outer edges of the bottom walls 20A, 22A and prevents the user's foot from moving outward.

The rear walls 20B and 22B are inclined in the front-rear direction, and the inclination angle to the bottom walls 20A and 22A may be about 25 to 45 degrees. The front walls 20C and 22C are inclined in the front-rear direction, and the inclination angle to the bottom walls 20A and 22A may be about 45 to 75 degrees. The inner side walls 20D and 22D and the outer side walls 20E and 22E are almost erect, and the inclination angle to the bottom walls 20A and 22A may be about 75 to 90 degrees.

The outer side walls 20E, 22E have a wall height of the toe sides 21B, 23B lower than the wall height of the heel sides 21A, 23A. The front walls 20C, 22C are equal to the wall height of the heel sides 21A, 23A of the outer side walls 20E, 22E. Thereby, the left leg recessed part 20 and the right leg recessed part 22 are lower than the front part and the front side of the left leg recessed portion 20 and the right leg recessed portion 22, and the portion is formed. The toes face the outer clearance portions 24, 26.

The electric motor 30 is mounted to the base 12 . The drive pulley 34 is mounted to the output shaft 32 of the electric motor 30. The driven pulley 36 is attached to the central shaft 28 of the rotating body 14. The endless belt 38 is mounted on the drive pulley 34 and the driven pulley 36. Thereby, the rotating body 14 can be rotationally driven around the center of itself by the electric motor 30. Furthermore, the transmission pulley 34 and the driven pulley 36 are toothed, and the transmission belt 38 can also It is a toothed belt (belt belt) that engages the transmission pulley 34 and the driven pulley 36.

The controller 40 is disposed on the base 12 . The controller 40 includes a motor driver that rotates the electric motor 30 back and forth at a predetermined rotational angle and a predetermined rotational speed. The controller 40 is a wireless communication device such as infrared transmission or Bluetooth, and is configured to perform variable setting of the switching and the rotation angle and the rotation speed of the power source by communication with an external handheld controller (not shown). The power supply of the lower limb exercise assisting device 10 can be either a commercial AC power source or a rechargeable internal battery.

The lower limb exercise assisting device 10 is used in a state in which the user is sitting on the chair, and the heel of the left foot is placed in the vicinity of the corner portion of the bottom wall 20A and the rear wall 20B, and the left foot is placed in the left foot. The right foot is placed in the recess for the right foot 22 so that the heel of the right foot is located near the corner of the bottom wall 22A and the rear wall 22B. When the power is turned on, the rotating body 14 is rotationally driven by the electric motor 30, and the rotating body 14 is repeatedly rotated back and forth at a predetermined rotation angle and a predetermined rotation speed.

As shown in Fig. 4(A), the rotating body 14 has a rotational position on the straight line parallel to the user in the left-right direction recessed portion 20 and the right-foot recessed portion 22 as a neutral position, and a right-turning position and a left-turning position. Rotating back and forth repeatedly, the right rotation position is as shown in FIG. 4(B), and the rotation angle θ a is rotated clockwise from the neutral position, and the left rotation position is as shown in FIG. 4(B) from the neutral position. Rotate the rotation angle θ b counterclockwise.

Thereby, the left and right feet alternately move forward and backward slightly, and the flexion of the knee joint is repeatedly performed. The rotation angles θ a and θ b of the rotating body 14 may be equal to each other at an angle of about 25 to 45 degrees. Rotation of the rotating body 14 The speed may be a peripheral speed of the center point of the left-foot recessed portion 20 and the right-foot recessed portion 22 in the left-right direction, and is about 20 to 40 mm/sec.

Since the lower limb exercise assisting device 10 does not need to convert the rotational output of the electric motor 30 into a mechanism for the back and forth movement of the slider, the structure simplification, cost reduction, and weight reduction can be achieved.

Further, the restriction portions for the left and right legs necessary for the flexion motion of the knee joint are the left-foot recessed portion 20 and the right-foot recessed portion 22 formed in the rotary body 14, that is, the groove formed integrally with the rotary body 14, The configuration of the restricting portion of the foot does not become complicated, and this also contributes to cost reduction and weight reduction of the lower limb exercise assisting device 10.

The left and right legs of the user who has placed the left-foot recess 20 and the right-foot recess 22 move on the circular trajectory of the left-foot recess 20 and the right-foot recess 22 which are rotated by the rotator 14.

In the movement of the circular trajectory, when the rotator 14 is rotated to the right (when rotated clockwise), as shown in FIG. 4(B), the left toe is moved outward with respect to the right toe. It is the "inner eight" shape that moves toward the inside. When the rotating body 14 is rotated to the left (when rotating counterclockwise), as shown in FIG. 4(C), the left toe is moved outward in the "outer eight" shape, and the right toe is moved inward. "Inner eight" shape.

Anatomically, when the human foot becomes the "inner eight" in which the toe moves inward as compared with the "outer eight", the degree of freedom of the knee joint is low, and the knee joint is burdened with twisting.

In this regard, since the lower limb exercise assisting device 10 is provided with the play portions 24, 26, as shown in Figs. 4(B) and (C), the toes are moved inwardly. The toe on one side of the eight shape will naturally be located in the clearance portions 24, 26 to prevent the toes from moving inward. Furthermore, the "outer eight" shape in which the toes move outward is advantageous in that the knee joint of the direction is high in freedom and does not burden the knee joint, so it is not necessary to provide a clearance in the direction.

Therefore, even if the left-foot recessed portion 20 and the right-leg recessed portion 22 are circularly moved by the rotation of the rotating body 14, the burden of twisting of the knee joint is not caused as in the case of linear motion, and the knee joint is flexed. The sports will be carried out in a moving manner. The flexion motion of the knee joint is such that the left-foot recessed portion 20 and the right-foot recessed portion 22 are located on a diameter line passing through the center of rotation of the rotating body 14, and are disposed symmetrically with respect to the center of rotation of the rotating body 14 The left leg and the right leg are equally performed.

Next, another embodiment of the lower limb exercise assisting device of the present invention will be described with reference to Figs. 5 and 6 .

In this embodiment, the electric motor 52 is attached to the upper surface of the base-side mounting plate 50 fixed to the base 12. A worm 56 is mounted on the output shaft 54 of the electric motor 52. A worm wheel 60 rotatable by a shaft 58 is mounted on the abutment side mounting plate 50. The worm gear 60 is engaged with the worm 56. A body of the large diameter gear 64 and the small diameter gear 66 is rotatably mounted on the base side mounting plate 50 by a shaft 62. The large diameter gear 64 is engaged with the worm 56.

A guide substrate 70 on which a plurality of guide pins 68 are mounted is mounted on the abutment side mounting plate 50. The rotating body side mounting plate 72 is fixed to the bottom surface of the rotating body 14 (refer to FIG. 2). An arcuate long hole 74 is formed in the rotating body side mounting plate 72 so that the respective guide pins 68 are slidably engaged. By this engagement, the rotating body 14 can be disposed around the central axis of the base 12 in the longitudinal direction of the elongated hole 74. Rotate back and forth within the predetermined range of rotation angles.

The sector gear 78 is fixed to the rotator side mounting plate 72 by a plurality of mounting pins 76. The sector gear 78 is disposed concentrically with the center axis (rotation center) of the rotating body 14 and is engaged with the small diameter gear 66.

With this configuration, the rotation of the electric motor 52 is transmitted to the worm wheel 60 by the worm 56. The rotation of the worm wheel 60 is reduced to the sector gear 78 via the large diameter gear 64 and the small diameter gear 66. Thereby, if the electric motor 52 is repeatedly driven to rotate back and forth, the rotating body 14 can be rotated back and forth on the base 12 at a predetermined rotation angle and a predetermined rotation speed about its own central axis.

The worm 56, the worm wheel 60, the large diameter gear 64, the small diameter gear 66, and the sector gear 78 may also be resin products and constitute a highly silent gear transmission mechanism.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and the present invention is not limited to the scope of the present invention. Make appropriate changes. For example, the shape of the base 12 and the rotating body 14 is not limited to a disk shape, but may be set to any shape. The rotational driving of the rotating body 14 is not limited to the one including the belt type transmission mechanism or the gear mechanism, and may be a chain type transmission mechanism or a direct drive method using a transmission motor coaxially disposed with the center shaft 28. Further, the constituent elements described in the above embodiments are not necessarily all necessary, and may be appropriately selected and selected without departing from the gist of the present invention.

As a result of this reference to the Japanese patent application of the case under the Paris Convention as a priority case (the wish of May 14, 2015) The disclosure of 2015-98900) is therefore included in the present specification.

10‧‧‧ Lower limb exercise assist device

14‧‧‧ rotating body

16‧‧‧rails

18‧‧‧ balls

20‧‧‧The recess for the left foot

20A‧‧‧ bottom wall

20B‧‧‧Back wall

20C‧‧‧ front wall

20D‧‧‧ inner side wall

20E‧‧‧Outer side wall

21A‧‧‧ heel side

21B‧‧‧Toe side

22‧‧‧The recess for the right foot

22A‧‧‧ bottom wall

22B‧‧‧Back wall

22C‧‧‧ front wall

22D‧‧‧ inner side wall

22E‧‧‧Outer side wall

23A‧‧‧ heel side

23B‧‧‧Toe side

24‧‧‧ clearance

26‧‧‧ clearance

28‧‧‧ center axis

30‧‧‧Electric motor

32‧‧‧ Output shaft

34‧‧‧Drive pulley

36‧‧‧driven pulley

38‧‧‧ drive belt

40‧‧‧ Controller

Claims (3)

A lower limb motion assisting device includes: a base; a rotating body disposed on the base and rotatable about a vertical axis; and a left leg recess and a right leg recess formed on the upper side of the rotating body The position has: an inner wall and an outer side wall for preventing the user's heel from moving rearward, and an inner side wall and an outer side wall for preventing the user's foot from moving laterally to the inner side and the outer side; and a driving device disposed on the base plate to rotate the foregoing The body is rotated back and forth at a predetermined angle of rotation. The lower limb motion assisting device according to claim 1, wherein the left leg recess and the right leg recess are located on a diameter line passing through a rotation center of the rotating body, and are disposed symmetrically with respect to the rotation center. The lower limb movement assisting device according to claim 1 or 2, wherein the outer side wall of the left leg recess and the right leg recess is such that the wall on the toe side is higher than the wall on the heel side.