WO2016121019A1

WO2016121019A1 - Articulating joint for limb braces

Info

Publication number: WO2016121019A1
Application number: PCT/JP2015/052266
Authority: WO
Inventors: 勇次弓木野
Original assignee: 有限会社出水義肢装具製作所
Priority date: 2015-01-28
Filing date: 2015-01-28
Publication date: 2016-08-04
Also published as: JP5807888B1; JPWO2016121019A1

Abstract

The purpose of the present invention is to provide an articulating joint for limb braces such that adjustment of the range of movement can be facilitated and load can be reduced. The articulating joint is provided with: a first articulating joint part (2) having a horseshoe-shaped recess (8) with a rotation shaft (9) disposed substantially in the center thereof and a groove (13) which is formed in communication with the recess (8) at a position facing the substantially center part of the inner circumference (12) of the recess (8); a second articulating joint part (3) which has a first projection (20) formed so as to be insertable into the recess (8) and a second projection (21) spaced apart from the first projection (20) by a predetermined distance and formed so as to be insertable into the recess (8), said second articulating joint part (3) being mounted pivotally about the rotation shaft (9); and a torsion spring (16) which is rotatably placed over the rotation shaft (9) and has one end (18) bent in the centrifugal direction so as to be locked in the groove (13), with the other end (19) being bent in the centrifugal direction so as to be located between the first projection (20) and the second projection (21)

Description

Prosthetic joint joint joint

The present invention relates to a joint joint for a prosthetic device. More specifically, the present invention relates to a joint joint for prosthetics and orthotics in joint range-of-motion training for improving the movement of a hardened joint.

In order for a person with a physical disability due to a stroke, rheumatism, or a traffic accident to return to home or society and become independent, muscle strengthening training that has become weak due to paralysis or bedridden, rheumatoid arthritis and do not move after surgery Therefore, it is necessary to practice joint range of motion training to improve the movement of the joint that has solidified, basic actions such as turning over, getting up, and standing up, and practice of walking.

In this joint range-of-motion training, a joint joint is used for a prosthetic limb orthosis, and this type of joint joint for a prosthetic limb orthosis is disclosed in Patent Document 1, for example.
Specifically, as shown in FIGS. 8 (A) and 8 (B), the first joint base 103 and the second joint plate 102 are formed in the lower end of the upper joint rod 101 and the upper end of the lower joint rod 102, respectively. A joint base 104 is provided, and a concave groove 105 is formed along the circumference of the first joint base 103.

A convex piece 106 that fits into the groove 105 is formed on the circumferential surface of the second joint base 104, and the first joint base 103 and the second joint base 104 are rotatable with respect to each other by the central shaft 107. It is pivotally attached to the state.

In addition, a plurality of spheres 108 formed of cemented steel material are sandwiched between the convex pieces 106 of the second joint base 104 in the concave grooves 105 formed along the circumference of the first joint base 103. It is loaded. Further, a threaded hole 109 communicating with the recessed groove 105 is formed in the outer peripheral edge of the first joint base 103, and a screw type operating pin 110 is screwed into the threaded hole 109.

In addition, two screw holes (not shown) having a diameter that allows the spherical body 108 to be inserted and removed freely are formed on the outer surface of the second joint base 104 so as to communicate with the inside of the concave groove 105. A lid screw 111 for closing the screw hole 109 is screwed.

In the joint joint for a prosthetic limb orthosis having such a configuration, a gap is created between the spheres 108 by removing the cap screws 111 and removing the necessary number of spheres 108 loaded in the concave grooves 105. 108 rotates. Thereby, the convex piece 106 of the second joint base 104 can move in the concave groove 105, and the movable range of the second joint base 104 can be set.

Japanese Patent No. 4053533

Here, when the joint joint for prosthetic limbs described in Patent Document 1 is used for an ankle joint, for example, a considerable load is applied to the sphere in the groove portion when standing up or walking. .

In this case, since the convex piece and the sphere and the spheres are in point contact, the load is concentrated on one point, and it becomes necessary to manufacture the sphere with a material having high hardness.

Also, it may be difficult for a person with a physical disability because the sphere for adjusting the movable range is very complicated.

The present invention was devised in view of the above points, and an object thereof is to provide a joint joint for a prosthetic orthosis that can easily adjust the range of motion and can reduce the load. It is what.

In order to achieve the above object, the joint joint for prosthetics and orthotics according to the present invention includes a horseshoe-shaped recess having a rotation shaft formed substantially at the center, and a position facing the substantially center of the inner peripheral surface of the recess. A first joint portion having a groove portion formed in communication with the concave portion, a first convex portion formed so as to be insertable into the concave portion, and a predetermined interval from the first convex portion. A second joint portion having a second convex portion formed so as to be insertable into the concave portion and pivotally attached to the rotary shaft, and extrapolated rotatably to the rotary shaft And one end bent in the centrifugal direction and anchored in the groove, and the other end bent in the centrifugal direction and positioned between the first and second protrusions. And a spring.

Here, a horseshoe-shaped recess having a rotation shaft formed in the approximate center, and a first joint portion having a groove formed in communication with the recess in a position facing the approximate center of the inner peripheral surface of the recess, A space portion can be formed between the rotation shaft and the inner peripheral surface of the recess.
For example, it is possible to form a movable range that is movable along the inner peripheral surface of the concave portion around the rotation axis.

And a first convex portion formed so as to be insertable into the concave portion, a second convex portion formed so as to be insertable into the concave portion with a predetermined interval from the first convex portion, and By the second joint portion pivotally attached to the rotation shaft, the first protrusion and the second protrusion can move around the rotation shaft in the recess.
For example, by rotating the second joint portion within a predetermined angle range, the first convex portion and the second convex portion rotate within the concave portion along the inner peripheral surface of the concave portion of the first joint portion. It becomes possible to move around the axis.

Moreover, while being rotatably extrapolated to the rotating shaft, one end is bent in the centrifugal direction and anchored in the groove portion, and the other end is bent in the centrifugal direction, and the first protrusion and the second With the torsion spring positioned between the convex portions, the rotation of the second joint portion can be braked by the urging force of the torsion spring.
For example, the other end of the torsion spring is forcibly moved along the inner peripheral surface of the concave portion of the first joint portion by the first convex portion and the second convex portion to return to the original position. It becomes possible to generate power.

Further, in the joint joint for prosthetics and orthotics according to the present invention, the first joint portion is screwed into the recessed portion at both side positions of the groove portion, the screw hole, and the tip is movable into the recessed portion. When it has the screw part for the movable range adjustment screwed, it becomes possible to adjust the area | region in the recessed part of a 1st coupling part.
For example, it is possible to adjust the movable range of the first convex portion or the second convex portion by projecting the tip of the movable range adjusting screw portion into the concave portion of the first joint portion. It becomes possible to adjust the rotation angle of 2 joint parts.

Further, in the joint joint for prosthetic limbs according to the present invention, the first convex portion and the second convex portion are formed in an arc shape on the side contacting the inner peripheral surface of the concave portion, and the circumference of the second convex portion When the direction length is shorter than the circumferential length of the first convex portion, the first convex portion and the second convex portion are arranged along the inner peripheral surface of the concave portion of the first joint portion. Smooth movement is possible.
Furthermore, by setting the circumferential length of the second convex portion to be shorter than the circumferential length of the first convex portion, the first convex portion is within a predetermined angle range of the second joint portion. It is possible to provide a predetermined space portion between the first convex portion and the second convex portion. As a result, the rotation of the second joint portion in a state where the torsion spring is braked by the second convex portion, and the second joint portion in a state where the torsion spring is not braked by the first convex portion. Rotation is possible.

Further, in the joint joint for prosthetic limbs according to the present invention, when a spring braking adjustment pin that can be inserted is provided between the other end of the torsion spring and the second convex part of the second joint part. By positioning the spring braking adjustment pin between the first convex portion and the second convex portion, the distance between the first convex portion and the second convex portion is reduced, and the second joint portion is When rotating within a range of a predetermined angle, the torsion spring is pressed by the second convex portion, and the rotation of the second joint portion can be braked.

In the joint joint for artificial limb orthosis according to the present invention, when the torsion spring is formed of a hard steel wire having a wire diameter of 2 mm or more, the urging force of the torsion spring can be increased.
For example, in the case of a joint for an ankle joint, a very large load is applied, but it is possible to have sufficient load resistance by using a hard steel wire having a wire diameter of 2 mm or more with respect to this load. .

According to the present invention, the movable range can be easily adjusted and the load can be reduced.

It is a three-dimensional schematic diagram for demonstrating an example of the joint joint for prosthetic appliances to which this invention is applied. Schematic diagram (A) for explaining an example of the internal mechanism of the joint joint for prosthetic limbs to which the present invention is applied, and schematic diagram (B) for explaining the internal mechanism in the CC section of FIG. It is. It is a disassembled schematic diagram for demonstrating each component of the joint joint for prosthetic limbs to which this invention is applied. Schematic diagram (A) for explaining a dorsiflexion state in the joint joint for prosthetics orthosis to which the present invention is applied and having a spring braking adjustment pin, and for spring braking adjustment in the joint joint for prosthetics orthosis to which the present invention is applied It is a schematic diagram (B) for demonstrating the bottom bent state in the case of having a pin. Schematic diagram (A) for explaining the dorsiflexion state in the joint joint for artificial limb orthosis to which the present invention is applied without the spring braking adjustment pin, and spring braking adjustment in the joint joint for artificial limb orthosis to which the present invention is applied It is a schematic diagram (B) for demonstrating the bottom bent state in case it does not have a use pin. The schematic diagram (A) for demonstrating the dorsiflexion state by the movable range adjustment by the screw part for movable range adjustment in the joint joint for artificial limbs to which this invention is applied, and the movable range in the joint joint for artificial limbs to which this invention is applied It is a schematic diagram (B) for demonstrating the bottom bent state by the movable region adjustment by the screw part for adjustment. It is a schematic diagram for demonstrating an example of the use condition of the joint joint for prosthetic limbs to which this invention is applied. It is a plane schematic diagram (A) for explaining an internal mechanism in an example of a conventional joint joint for prosthetic limbs, and a cross-sectional schematic diagram (B) for explaining an internal mechanism in an example of a conventional joint joint for prosthetic limbs. .

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

FIG. 1 is a three-dimensional schematic diagram for explaining an example of a joint joint for a prosthetic limb orthosis to which the present invention is applied.

The joint joint 1 shown here is, for example, a horseshoe-shaped first joint part 2 having a thickness of about 9 mm, and a substantially 3 mm joint pivotally attached to the first joint part 2 so that a predetermined movable region can be rotated. It is comprised from the disk-shaped 2nd coupling part 3 which has thickness.

Also, the first joint part 2 is provided with a first prosthetic device mounting plate part 4 extending on the same surface as the outer surface 10 of the first joint part 2.

Further, the second prosthetic device mounting plate part bent on the circumference of the second joint unit 3 so as to be flush with the first prosthetic device mounting plate unit 4 and having a bifurcated tip. 5 is provided.

Furthermore, a plurality of mounting holes 6 are perforated in the first prosthetic device mounting plate portion 4 and the second prosthetic device mounting plate portion 5.

Further, a pivot pin 7 is provided at the approximate center of the first joint portion 2 and the second joint portion 3 so as to be rotatable in a state where the first joint portion 2 and the second joint portion 3 are in surface contact. It has been.

2A is a schematic diagram for explaining an example of the internal mechanism of the joint joint for prosthetic limbs to which the present invention is applied, and FIG. 2B illustrates the internal mechanism in the CC section of FIG. 2A. It is a schematic diagram for doing. FIG. 3 is an exploded schematic view for explaining each part of the joint joint for prosthetic limbs to which the present invention is applied.

Here, a horseshoe-shaped concave portion 8 is formed on the inner surface of the first joint portion 2.

Furthermore, a rotating shaft 9 is formed projectingly at the approximate center of the recess 8. The rotating shaft 9 is formed by a cylindrical body having openings on both ends exposed on the outer surface 10 of the first joint portion 2. Furthermore, the inner peripheral cross section of the rotating shaft 9 is a connecting pin hole 17 having a substantially square shape.

Further, a groove portion 13 that is in communication with the recess portion 8 is formed at a position facing the substantially center of the inner peripheral surface 12 of the recess portion 8. Further, mooring sides (35, 35A) are formed at positions on both sides of the groove portion 13, and screw holes (14, 14A) communicated with the concave portion 8 are formed in the mooring piece 35 in the first joint portion 2. It is formed so that it may be exposed to the outer surface of the artificial limb orthosis attaching plate 4 side. The movable region adjusting screw portion (15, 15A) is screwed into the screw hole (14, 14A).

Further, a torsion spring 16 made of a hard steel wire and having a wire diameter of about 2 mm is extrapolated to the rotary shaft 9. One end 18 of the torsion spring 16 is bent in the centrifugal direction of the torsion spring 16 and inserted into the groove 13.

Further, the other end 19 of the torsion spring 16 is bent in the centrifugal direction at a position 180 degrees with respect to the one end 18 so as to divide the inside of the recess 8 into two.

Next, a pin insertion hole 23 is provided at substantially the center of the second joint portion 3 at the same position as the connecting pin hole 17 of the first joint portion 2 (see FIG. 3).

Further, the inner surface of the second joint portion 3 has a height substantially equal to the depth of the recess portion 8 of the first joint portion 2 along the circumferential direction thereof, and the inside of the recess portion 8 with the rotary shaft 9. The first convex portion 20 and the second convex portion 21 having a width that can be fitted into the concave portion 8 and having an arc shape on the side in contact with the inner peripheral surface of the concave portion 8 are formed to project.

In addition, the first convex portion 20 has a starting end 22 at a position that is substantially the center in the width direction of the second prosthetic device mounting plate 5, and a starting end 22 </ b> A of the second convex portion 21 is the second prosthetic device. A predetermined interval is provided from substantially the center in the width direction of the mounting plate portion 5 to be a rear position.

Here, the other end 19 of the torsion spring 16 is fitted into the concave portion 8 so as to be positioned between the first convex portion 20 and the second convex portion 21 of the second joint portion 3.

Also, a cylindrical spring braking adjustment pin 24 made of steel is inserted into the gap between the other end 19 of the torsion spring 16 and the start end 22A of the second convex portion 21.

Further, a pivot pin 7 having a quadrangular cross section is inserted into the connecting pin hole 17 of the first joint portion 2 and the pin insertion hole 23 of the second joint portion 3. A screw hole 25 is drilled through from the tip of the pivot pin 7.

Further, the first joint portion 2 and the second joint portion 3 are connected by screwing the fastening screw 26 into the screw hole 25, and the first joint is not rotated without the pivot pin 7 rotating. The part 2 or the second joint part 3 is in a rotatable state.

Further, it is possible to prevent the torsion spring 16 from being loosened by inserting the steel plate 26 into the gap between the one end 18 of the torsion spring 16 and the inside of the groove 13.

Next, FIG. 4 (A) is a schematic diagram for explaining the dorsiflexion state in the case of having a spring braking adjustment pin in the joint joint for prosthetic limbs to which the present invention is applied, and FIG. 4 (B) applies the present invention. It is a mimetic diagram for explaining the bottom bent state in the case where it has a spring braking adjustment pin in the joint joint for artificial limb orthoses.

Here, for example, when attaching the joint joint 1 to an artificial limb orthosis (not shown) for an ankle, the first joint portion 2 is connected to the lower limb portion of the artificial limb orthosis, and the second joint portion 3 is It is attached to the leg part of the prosthetic orthosis.

In the joint joint 1 in such a state, the ankle is raised (back bent state) when standing from a sitting state, and the second joint portion 3 is imaginary in the figure with respect to the first joint portion 2. (See FIG. 4A).

In this case, the second joint portion 3 rotates until the second convex portion 21 comes into contact with the mooring side 35A of the first joint portion 2 and at the same time, the first convex portion 20 pushes the other end 19 of the torsion spring 16. It rotates while resisting the biasing force.

Therefore, at the time of the transition from the dorsiflexion state to the bottom flexion state, the second joint portion 3 is pushed back by the urging force of the torsion spring 16 and reversed to the initial state.

Further, the ankle is lowered during the walking (bottom bent state), and the second joint portion 3 is rotated with respect to the first joint portion 2 in a direction indicated by an imaginary line in FIG. )reference).

In this case, the second joint 3 rotates until the first protrusion 20 contacts the mooring side 35 of the first joint 2 and simultaneously the second protrusion 21 also rotates.

Here, the spring braking adjustment pin 24 is disposed between the second protrusion 21 and the other end 19 of the torsion spring 16, so that the second protrusion 21 presses the spring braking adjustment pin 24. Thus, the spring braking adjustment pin 24 rotates while the other end 19 of the torsion spring 16 resists the urging force.

Therefore, at the time of transition from the bottom bent state to the back bent state, the second joint portion 3 is reversed to the initial state by being pushed back by the biasing force of the torsion spring 16.

FIG. 5A is a schematic diagram for explaining a dorsiflexion state in the joint joint for prosthetics orthosis to which the present invention is applied without a spring braking adjustment pin, and FIG. 5B applies the present invention. It is a mimetic diagram for explaining the bottom bent state in the case where it does not have a spring braking adjustment pin in the joint joint for prosthetic limbs.

Here, in the case of the dorsiflexion state, the second joint portion 3 rotates in the direction indicated by the imaginary line in the drawing with respect to the first joint portion 2 (see FIG. 5A).

Further, in the case of the bottom bent state, the second joint portion 3 rotates in the direction indicated by the imaginary line in the figure with respect to the first joint portion 2 (see FIG. 5B).

In this case, since there is a predetermined space between the first protrusion 20 and the second protrusion 21, the second protrusion 21 rotates without coming into contact with the other end 19 of the torsion spring 16. It will be.

Therefore, it is possible to rotate or reverse the second joint portion 3 in a state where the torsion spring 16 is not braked.

Next, FIG. 6 (A) is a schematic diagram for explaining the dorsiflexion state by the movable range adjustment by the movable range adjusting screw portion in the joint joint for prosthetic limbs to which the present invention is applied, and FIG. 6 (B) is the present invention. It is a schematic diagram for demonstrating the plantar bending state by the movable range adjustment by the screw part for movable range adjustment in the joint joint for prosthetic limbs to which this is applied.

Here, the movable range adjusting screw portion (15, 15A) is screwed into the screw hole (14, 14A) provided in the mooring side (35, 35A) of the first joint portion 2, and this movable range The adjustment screw part (15, 15A) is rotated from the outside of the first joint part 2 with a tool such as a screwdriver.

Thus, the 1st convex part 20 and the 2nd convex part are carried out by rotating the movable region adjustment screw part (15, 15A) and projecting the first joint part 2 into the concave part 8. The movable space portion 21 is reduced. Thereby, the movable region of the second joint part 3 can be adjusted freely.

For example, in the case of a dorsiflexion state, the second joint portion 3 rotates in the direction indicated by the imaginary line in the drawing with respect to the first joint portion 2 (see FIG. 6A).

In this case, the second joint portion 3 rotates until the second convex portion 21 contacts the movable range adjusting screw portion 15 protruding from the mooring side 35A of the first joint portion 2 and at the same time the first convex portion. 20 rotates while the other end 19 of the torsion spring 16 resists the urging force.

Further, in the case of the bottom bent state, the second joint portion 3 rotates in the direction indicated by the imaginary line in the drawing with respect to the first joint portion 2 (see FIG. 6B).

In this case, the second joint portion 3 is rotated until the first convex portion 20 contacts the movable range adjusting screw portion 15A protruding from the mooring side 35A of the first joint portion 2 and at the same time the second convex portion. 21 also rotates.

As shown in FIG. 7, the joint joint for prosthetic limbs according to the present invention has a lower limb device 31 attached to the lower limb 30 and a foot device 33 attached to the foot 32.

Here, the joint joint 1 is arranged on the outer side and the inner side of the lower limb orthosis 31 and the foot orthosis 33, respectively.

In the joint joint 1, the first prosthetic device mounting plate 4 of the first joint 2 is connected and fixed to the lower limb device 31 by a fastening member 34 such as a bolt and a nut.

Also, the second prosthetic device mounting plate 5 of the second joint unit 3 is connected and fixed to the foot device 33 by a fastening member 34 such as a bolt or a nut.

In this way, when the joint joint 1 is attached between the lower limb orthosis 31 and the foot orthosis 33, the foot 32 can be moved within a predetermined region when the dorsiflexion state or the bottom flexion state occurs. It becomes.

In addition, braking can be applied when the urging force of a torsion spring (not shown) shifts to a dorsiflexion state or a bottom flexion state, and a return to the initial state can be performed smoothly.

Furthermore, it is possible to easily adjust the movable range in millimeters by rotating the movable range adjusting screw part with a screwdriver or the like from the outside of the joint joint.

In the present embodiment, the first joint portion has screw holes that are continuously drilled in the recesses at both side positions of the groove portion, and the tip ends of the first protrusions and the second protrusions in the screw holes. The movable range adjusting screw portion is screwed so as to be movable in the movable direction of the portion, but it is not always necessary to have the movable range adjusting screw portion.

However, it is desirable to have a movable range adjusting screw portion in that the movable range of the second joint portion can be freely adjusted.

In the present embodiment, the first convex portion and the second convex portion are formed in an arc shape on the side in contact with the inner peripheral surface of the concave portion, and the circumferential length of the second convex portion is the first length. The circumferential length of the second convex portion is not necessarily shorter than the circumferential length of the first convex portion.

However, it is desirable that the circumferential length of the second convex portion is shorter than the circumferential length of the first convex portion in that braking by the torsion spring is easily applied in the bottom bent state. .

In this embodiment, a spring braking adjustment pin that can be inserted is provided between the other end of the torsion spring and the second convex portion of the second joint portion. There is no need to provide an adjustment pin.

However, it is desirable to provide the spring braking adjustment pin in that the movement of the second joint portion in the bottom bent state can be braked by providing the spring braking adjustment pin.

In the present embodiment, the torsion spring is formed from a hard steel wire having a wire diameter of 2 mm or more, but it is not necessarily formed from a hard steel wire having a wire diameter of 2 mm or more.

However, it is desirable to form a torsion spring from a hard steel wire having a wire diameter of 2 mm or more at a place where a large load is applied such as an ankle joint.

DESCRIPTION OF SYMBOLS 1 Joint joint 2 1st joint part 3 2nd joint part 4 1st artificial limb orthosis attachment board part 5 2nd artificial limbs orthosis attachment board part 6 Attachment hole 7 Pivot pin 8 Recessed part 9 Rotating shaft 10 Outer side surface 12 Inside Peripheral surface 13

Groove parts

14 and 14A Screw holes 15 and 15A Movable range adjustment screw part 16 Torsion spring 17 Connection pin hole 18 One end 19 The other end 20 First convex part 21 Second convex part 22 and 22A Start end 23 Pin insertion Hole 24 Spring braking adjustment pin 25 Screw hole 26 Steel plate 30 Lower limb 31 Lower limb equipment 32 Foot 33 Foot equipment 34

Fastening member

35, 35A Mooring side

Claims

A horseshoe-shaped recess having a rotational axis formed at the approximate center thereof, and a first joint portion having a groove formed in communication with the recess at a position facing the approximate center of the inner peripheral surface of the recess;
A first convex portion that can be inserted into the concave portion, and a second convex portion that can be inserted into the concave portion with a predetermined distance from the first convex portion, and A second joint portion pivotally attached to the rotation shaft;
The rotary shaft is rotatably extrapolated to the rotating shaft, one end is bent in the centrifugal direction and anchored in the groove portion, and the other end is bent in the centrifugal direction and the first convex portion and the second convex portion are bent. A joint joint for a prosthetic limb orthosis comprising a torsion spring positioned between the convex part of the prosthesis.
The first joint portion includes a screw hole that is pierced in the concave portion at both sides of the groove portion, and a movable range adjustment screw that is screwed into the screw hole so that the tip is movable into the concave portion. The joint joint for a prosthetic limb orthosis according to claim 1, comprising a threaded portion.
The first convex portion and the second convex portion are formed in an arc shape on the side contacting the inner peripheral surface of the concave portion, and the circumferential length of the second convex portion is the same as the first convex portion. The joint joint for a prosthetic limb orthosis according to claim 1, wherein the length is shorter than a circumferential length of the portion.
The joint joint for artificial limb orthoses according to claim 1, further comprising a spring braking adjustment pin that can be inserted between the other end of the torsion spring and the second convex portion of the second joint portion.
The joint joint for artificial limb orthoses according to claim 1, wherein the torsion spring is formed of a hard steel wire having a wire diameter of 2 mm or more.