JPS58163356A - Artificial foot - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Regarding a prosthetic leg used by a physically disabled person who has had an amputated limb and has difficulty walking, more specifically, the ankle joint part can be bent back and forth and left and right by the pivot support and the spherical joint bearing K. In addition to sexual function, it has become desirable to have a movement similar to that of a healthy foot when walking, and in line with this idea, a hinge is attached to the sole member fixed to the foot. A flexible ankle prosthesis has been developed by implanting a pin in the ankle member that swings back and forth, and also using a cushioning member, but the ability to swing only back and forth is not sufficient. Also, the structure was unsatisfactory, as it was a double track and it was difficult to adjust it to suit walking.

Furthermore, in the case of power prosthetic legs that have been developed in recent years, in which the knee joint and other parts are rotated by small hydraulic motors, when using the above-mentioned conventional prosthetic legs, strong impact forces are applied to the wearer of the powered prosthesis due to uneven road surfaces. However, the present invention provides a prosthetic leg that causes fatigue during walking and causes the user to fall.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the prosthetic leg according to the present invention will be described in detail below with reference to the accompanying drawings.

/ [The ankle member is provided with a cavity 3 into which the pipe 2 that becomes the leg is fitted, and slits α and b for fixing the pipe, and a screw shaft ψ provided in the slit α of the pipe fitted in the cavity 3.
(tighten) to fix the screw.

A penetrating hole S is provided at the center of the cavity 3, and the penetrating hole S has a large diameter S' and a small diameter y', and the large diameter part S' serves as a holding part for holding the spherical joint bearing 6. . In addition, the ankle member
The adjustment receiver 15 is used to align the through hole S with the center and adjust the receiver.

The sole member /2° is fixed to the foot part lB, and the sole member 1
An upright bearing piece 17 is provided on approximately the center shaft of 2, and a square bearing /r at the lower part of the support rod is pivotally supported by a shaft 19 on this bearing piece 17. In addition, there are two shafts /f, /F with a large diameter and a small diameter on the upper part of the support rod / bearing /f, and a screw 20 is provided on the shaft IP of the small diameter part to reduce the force of the nut. They are screwed together to make adjustments. The square bearing /ll' of the support rod /l is provided with an elastic cushioning material 2Q slightly exposed on the front and rear end sides, and this cushioning material 2Q, :lψ
are front and rear receiving pieces 7 and 7 extending from the lower surface of the ankle member l.
It is fitted into the book to provide a cushioning effect.

The sole member 12 has two high sole stages 23', 2! at a position facing the receiving portion 9 provided at the front end of the ankle member l. A dovetail groove 26 is provided in the left and right direction into which the front end damper molded into the dovetail groove 2 is fitted, and the tightening of the front end damper 25 which is slid into the dovetail groove 2 is loosened by adjusting the tension. After moving the front end damper J along the dovetail groove 26 to adapt to can be adjusted to an optimal position within a range of approximately 30 degrees forward and backward around axis /q.

Further, the ankle member l is supported by the support rod /l via a spherical joint bearing 6, and the cushioning material 2 of the support rod /I and :l
Since ψ and koV are interposed, the prosthesis can be rotated around the spherical joint bearing, resulting in a prosthetic leg that resembles a healthy leg.

l-Material l is a support rod/groove spherical surface that is pivotally supported on the sole member, -
Since it is supported via the armrest bearing 6 and the cushioning material 2/ and 21A, 211' provided on the support lever is interposed, it can be rotationally bent between the foot and the leg.
When walking, the proximate movement is performed on the healthy legs, giving satisfaction to the wearer. It also has the feature of being easy and accurate to adjust.

[Brief explanation of the drawing]

The drawing shows one embodiment of the prosthetic leg according to the present invention.
2 is a longitudinal sectional side view, FIG. 2 is a longitudinal sectional front view taken along line XX in FIG. 1, and FIG. 3 is a lateral plan view taken along line XX in FIG. 1. l~Ankle member Colpipe 3~Cavity T~Material 13~
Conical hole /44 ~ Elastic heel damper 15 ~ Adjustment receiver
76 ~ Foot part 17 ~ Bearing piece /l ~ Support rod 7g' ~ Square bearing /f ~ Large diameter part /r ~ Small diameter part iq ~ Shaft 20 ~
Screw 2/~Cushion material 27'~Through hole n~Suppression plate 23~Adjustment nut) 24',! r~Cushion material Δ~
Dambar 13' - High part J - Bottom part 26 - Dovetail groove 27 - Hole U - Spring kota - Sphere for stopper 30 - Recess Patent applicant Makoto Ishiita, Director of the Agency of Industrial Science and Technology - 1I/Figure 2 Figure 2 297 - Figure B

Claims (1)

[Claims] The lower part of the ankle member to which the leg pipe is fixed is supported so as to be able to swing back and forth and from side to side via a spherical joint bearing on a support rod that is pivotally supported by the sole member that is fixed to the foot. This artificial leg is characterized in that a cushioning material made of an elastic material is interposed, and a front end damper and a rear end heel damper are interposed between the ankle member and the sole member.