JPH084014Y2 - Shoe-type orthotic foot joint - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ankle joint for a shoe-type orthosis to be worn by a patient with an ankle disorder such as paralysis or ankle.

[0002]

2. Description of the Related Art Conventionally, as a structure of an ankle joint which is generally an ankle joint of a shoe-type orthosis of this type, there is a fixed structure in which a foot plate on the shoe side and a lower metal frame are connected by a fixed shaft in the past. It had a pivotal structure connected by, but lacks stability when walking. For this reason, at present, a spring pressure that pushes downward is applied to the upper edge of one side of the foot plate, and the foot plate is forcibly rotated when the foot is in a floating state. This is prevented (see, for example, Japanese Utility Model Publication No. 40-26553).

[0003]

[Problems to be solved by the device] However, as described above,
In the mode in which one side (rear part) of the upper end of the foot plate is simply rotated by the contact of the pressing ball with the obliquely inserted spring arranged on the lower metal plate side, the rotation control is performed in only one direction (toe). there were. For this reason, for example, it is not possible to deal with another aspect such as the case where the rear part (the heel part) is also required to be rotated or the case where the user wants to fix the part.

In view of the above-mentioned circumstances, the present invention has improved joint control of a foot plate by combining an eccentric cam with a movable / strength adjusting ball. It is an object of the present invention to provide a foot joint for a shoe-shaped orthosis that enables the movements of the three elements (the tilting joint) and solves the above problems.

[0005]

According to the present invention, the upper end of a foot plate raised to the shoe side is attached to a forked portion formed at the lower end of a lower metal frame.
Insert and pivot the center with the joint axis, and the upper end of the foot plate
Cam receivers with arcuate notches on the front and back of the edge
To the front and rear of the inner part of the forked part of the lower
Face the cam surface of the core cam and in front of the center of the upper edge of the foot plate
On the arc surface formed inside the pressure receiving piece provided later, the bifurcation
A pair of springs adjustable vertically from above the spring
The movable and strength adjusting balls pushed by the abutting contact each other.

[0006]

With the above-mentioned configuration, as a cleansack with only the toe pointed upward when walking, adjust the set position of the eccentric cam at the front position around the pivot point of the forked part and the foot plate, If a predetermined gap is created between this cam surface and the front cam receiving step of the foot plate, while the cam surface of the eccentric cam in the rear position is brought into direct contact with the rear cam receiving step, the foot is lifted. At this time, in order to apply the pressing force of the ball at the pair of spring ends in the central portion to the gap side (front side) of the foot plate (because another eccentric cam is in contact with the rear portion, there is no backward rotation). ), The foot plate rotates only forward and the toes are lifted, which allows walking without kicking. Also, if you want to move to the rear side during heeling (using double cleansack), adjust the set of eccentric cams at the rear position and provide a predetermined gap between the corresponding rear cam receiving steps. The rear part (heel part) is also rotatable by the gap. Furthermore, when it is better to fix the joints, if the cam set that maximizes the displacement of the front and rear two eccentric cams and contacts the front and rear cam receiving parts of the foot plate, the foot plate will not move and it will be fixed. Becomes

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings of the embodiments.

The drawing shows a lower limb orthosis type which is a strut on both sides, and 1 is a foot plate in which a U-shaped bent portion 1a is arranged so that the center of the foot rests on the bottom of the shoe 2, and the foot which is the standing portion on both sides. Arc-shaped cam receiving step portions 3 and 4 which are cut from the edge are provided in the front and rear of each upper edge of the plate 1, and a ball receiving pressure receiving piece 5 formed by a curved cutout on both sides of the central portion of the upper edge. , 6 are provided, the upper part of the foot plate 1 is inserted into a groove 8a of a bifurcated part 8 formed integrally with the lower end of the lower metal bar 7, and the central part is pivotally attached by a joint shaft 9 orthogonally penetrating the bifurcated part. Eccentric cams 10 and 11 serving as flat cams facing the cam receiving portions 3 and 4 of the foot plate 1 are provided in bulging portions 8b and 8b formed on both sides of the left and right screws that do not cause looseness. Adjustably attach with setscrews 12, 12. In addition, in the vertically parallel rotation adjusting insertion holes 13 formed in the upper part of the base of the bifurcated portion 8, the movable / strength adjusting ball 14 and the spring 15 serving as a pair of rotation adjusting tools.
And set screw 16 respectively are sequentially inserted, the movable and intensity adjustment ball 14, 14 of the lower end of the pressing receiving piece 5,6 inner
The foot joint 17 is configured as a whole by pressing the arc surfaces 5a and 6a . In this case, the lower metal 7 is the forked part 8.
It is integrated with a fixing screw 18 on one side. However, the longitudinal direction of the lower metal bar 7 and the longitudinal direction of the bifurcated portion 8 are in a state of being bent into a dogleg shape so as to escape the ankle of the foot. 19
Is a pivot hole formed in the upper part of the foot plate 1.

To explain this action, the shoe-shaped orthosis having the above-mentioned structure may be attached to the foot portion in the same manner as the conventional work. Here, when using so-called cleansack where only the toes are raised when walking, first, the forked part 8 of the lower metal bar 7 is used.
The eccentric cam 10 provided on the front side (toe side) of the above is loosened by loosening the set screw 12 and slightly rotated to displace the cam.
A predetermined gap a is provided between a and the cam receiving step portion 3 of the foot plate 1 which faces the a. On the other hand, the rear-side eccentric cam 11 which is (heel side) is immobile position Ru brought direct contact <br/> is a cam surface 11a on cam受段portion 4 to the maximum cam displacement, both eccentric cam 10 under this state, 1
1 is set again, and the screws 12, 12 are tightened and fixed.

In other words, the muscles of the ankle are weakened like those of a patient with ankle foot.
If your toes are constantly falling, walk in this state
It is necessary to forcibly point the toe upwards when walking to kick
There is. Therefore, as described above, the shoe 2 is placed on both sides of the bottom of the shoe 2.
It is an ankle joint part that has been integrally launched (two braces)
Facing the cam receiving step 3 at the front upper edge of each foot plate 1
The eccentric cam 10 has a predetermined gap a
And the rear side (the heel side) of the eccentric cam 11
The cam displacement is maximized and the cam surface 11a is brought into contact with the cam receiving step portion 4.
Then, the rearward rotation is restricted. Moreover, on this foot plate 1
On the circular arc surfaces 5a, 6a inside the pressure receiving pieces 5, 6 before and after the edge
Is the two springs 1 attached to the front and rear of the lower metal 7 side.
Abutting balls 14, 14 pushed by 5, 15 and
The pressing force of the balls 14, 14 is on the axis of the lower joint shaft 9.
Since they are located on both outer sides, the pressing force of each ball 14,14
Are inward due to the arcuate surfaces and face inwardly through the joint shaft 9
1 rotates in the front-back direction about the joint shaft 9 as a fulcrum.
(The pressing force of the balls 14, 14 crosses each other.
Converted to turning power). However, at the rear (heel side),
Since the eccentric cam 11 is in direct contact with the frame receiving step portion 4,
There is no turning to one side. Furthermore, when raising the tip of the toe, it is for turning forward
The spring 15 on the rear side of the
16 is pushed a little and the spring pressure is the spring of the front side spring 15.
The pressure is made larger than the pressure to strengthen the pressing of the arc surface 6a. Obey
The tip of a shoe that was kicked out when you walked forward while walking
(Toe 2a) automatically becomes upward joint movement, and
There is no chance of hitting the phase (see the solid line in Fig. 6). Toe
Adjustment of the upward angle depends on the cam displacement of the eccentric cam 10.
And the swing width of the foot plate 1 is adjusted by the fixed eccentric
Cam receiving part 3 of the foot plate 1 that can be rotated by the cam cotton 10a of the cam 10
It is the range until contact.

On the contrary to the pointed foot, the muscles are strong and the toes are up.
For people who have a flat bottom and cannot land on the ground flat,
Make sure to move the heel as well (double
Clenzac) . Similarly to the above, a gap a is provided between the eccentric cam 10 and the cam receiving step portion 3, and the rear eccentric cam 11 is also loosened by turning the setscrew 12 as appropriate, and a predetermined gap b is provided between the eccentric cam 11 and the cam receiving step portion 4. And the spring 1 on the front side
A set that rotates the foot plate 1 backward by slightly increasing the spring pressure of 5.
And By doing so, when the heel portion 2b of the shoe 2 lands while walking, the cam receiving step portion 4 having the gap b and the eccentricity
During the cam 11, the foot plate 1 by a gap b content of this rotates backwards. That is, contrary to the above-described operation toward the tip, when the heel is contacted, the button at the end of the spring 15 that engages with the arcuate surface 5a on the inner side of the pressure receiving piece 5 is stopped.
By the pressing force of the tool 14 to the outside (the heel side) via the joint shaft 9.
It becomes a front and rear tilting joint that rotates and the toe 2a side goes down.
(See the solid line in FIG. 7) . That is, the joint bends according to the heel of the heel portion 2b, so that a smooth (free) walking motion is obtained.
Even if the springs 15 and 15 have the same spring pressure,
Basically, there is a gap between the cam receiving part and the eccentric cam.
For example, when landing, the weight should be moved to rotate by the gap.
become.

Further, when it is desired to fix the ankle in a patient whose leg strength is weak, the eccentric cams 10 at the front and rear positions of the forked part 8,
11 is appropriately rotated to form a cam set which is in a stationary state and is in contact with the opposed cam receiving step portions 3 and 4.

At this time, even if the foot is lifted during walking, the foot plate 1 pivotally attached to the bifurcated portion 7 by the joint shaft 9 has the eccentric cams 10 and 11 in advance on the cam receiving step portions 3 and 4 at the upper and lower ends thereof. Since the contact receiving structure is provided, the pressing receiving pieces 5 and 6 in the central portion are immovable even if the pressing force of the balls 14 and 14 is applied, and the foot plate 1 becomes a fixed ankle joint (FIG. 8). reference).

[0014]

As described above, the foot joint of the shoe-type orthosis of the present invention is provided with an eccentric cam that can adjust the cam displacement at the cam receiving step portions before and after the upper end of the foot plate pivotally attached to the lower metal plate side. No, and because of the simple structure in which movable and strength adjusting balls that apply a pressing force to both sides (front and rear) of the center of the upper end are arranged, the foot plate can be easily and reliably moved forward just by adjusting the cam displacement of the eccentric cam. Can be rotated in the direction or the front-rear direction, or can be immovable, and the toes of the shoe can be raised when walking, or the heel part can be rotated when it is in the heel from the free leg phase. Therefore, it is possible to walk smoothly without inducing kicks or heel slipping. In other words, this foot joint is a conventional foot joint having three elements of fixed, cleansack and double cleansack, and is a simple foot joint with a wider range of use. In addition, the pressing force applied to this movable and strength adjusting ball can be easily adjusted by the screw insertion degree of the push screw, and it is adjusted according to the degree of treatment of patients with ankle disorders (children's palsy, pointed foot, etc.). Can be done on site. In addition, since the set screws for fixing the eccentric cam are threaded in the tightening direction respectively (right screw for front eccentric cam, left screw for rear eccentric cam). It has a practical effect such as a safety type that does not cause the eccentric cam to loosen the screw.

[Brief description of drawings]

FIG. 1 is a side view of a main part showing an embodiment of the present invention.

FIG. 2 is a rear view.

FIG. 3 is a front view.

FIG. 4 is a separated side view.

FIG. 5 is a side view of the shoe-type equipment.

FIG. 6 is an explanatory diagram of a forward tilt rotation joint state.

FIG. 7 is an explanatory diagram of a front-back tilt rotation joint state.

FIG. 8 is an explanatory diagram of a fixed joint state.

[Explanation of symbols]

 1 Foot plate 2 Shoes 3,4 Cam receiving step 5,6 Ball receiving pressing receiving piece 7 Lower metal plate 8 Forked portion 9 Joint shaft 10,11 Eccentric cam 12 Set screw 14 Movable and strength adjusting ball 15 Spring

Claims (1)

[Scope of utility model registration request] 1. An upper end of a foot plate raised to the shoe side is inserted into a bifurcated portion formed at a lower end of a lower reinforcement, and a center is pivotally attached by an articulated shaft.
In addition, the front and rear sides of the upper edge of the foot plate each have an arc.
At the cam receiving step that is cut out like a line,
Face the cam surfaces of the eccentric cams attached to the front and rear,
And inside of the pressure receiving piece provided before and after the center of the upper edge of the foot plate
On the arc surface formed on the pair, a pair vertically mounted from above the bifurcated portion.
Adjustable spring pressure Adjustable spring strength and movable strength
Foot joints for shoe-type orthosis made by abutting adjustment balls .