SU1563692A1 - Forearm prosthesis for splitted stump - Google Patents

Abstract

The invention relates to medical technology and can be used to supply people with disintegration stump to the forearm according to Krukenburg. The purpose of the invention is to eliminate false actuations of the electric drive during any involuntary, natural movements of the stump in the receiver. The prosthesis includes a sleeve of the forearm 1, an artificial brush 10 with an electric drive 11, a power supply 16, two pairs of microswitches 12-15, a control lever 3 with lodgments for the ulnar and radial branches of the stump. Buttons of microswitches 12-15 are contact-connected with arcuate pads 6 of control lever 3. Contacts of microswitches 12-15 are interconnected and with electric drive 11 according to scheme I. 6 Il.

Description

The invention relates to medical technology, more specifically to prosthetics and prosthetic design.

The purpose of the invention is to eliminate false actuations of the electric drive during any involuntary, natural movements of the stump in the receiver.

Figure 1 shows the prosthesis, General view; 2 shows the control lever structure; on fig.Z - the same, the view from the left; figure 4 is the same, top view; FIG. 5 is a view A of FIG. 3; 6 is an electrical connection diagram for the electric drive.

A prosthetic forearm on a split stump contains a sleeve 1 forearm with a receiver 2 stump, a control lever 3 having, on one side, two parallel strips 4 with lodgments 5, a radial and ulnar branch of the stump, and on the other hand, arcuate platforms 6. The latter are fixed on axis 7, installed on the base 8, fixed in the housing 9 of the artificial brush 10, equipped with an electric drive 11. On the base 8, also electrocontact elements are fixed in the form of microswitches 12-15. Normally closed contacts of microswitches 12 and 13 are initially connected to one of the poles, for example, 1 | + power supply 16 and electric drive 11, and similar contacts of microswitches 14 and 15 to a pole - power supply 16. Normally open contacts of microswitches 12 and 15, as well as 13 and 14 are interconnected. Electric microswitches 12-15 are connected to an electric drive 11 according to the scheme I, Microswitches 12-15 are installed in pairs under arcuate platforms 6. Power supply 16 - a portable battery type 10 TsNK-0.45 - connected to electric drive 11 using a cord 17 power switch 18.

The prosthesis is used as follows.

Putting on the prosthesis, radial and ulnar branches of the split stump, the forearm is placed in the cradle 5 of the lever 3 of the control. Connect the power source 16. Moving the branches in parallel planes in different directions, they move the strips 4, with the help of which the movements are transmitted to the arc-shaped platforms 6. The latter perform swinging movements, pressing the microswitches 12 and 14 installed on the diagonally opposite sides of the base 8. When This triggers the contacts of these microswitches, which connect the actuator 11 to the power source 16. The actuator 11 moves the prosthesis actuator (this does not indicate, for example, the fingers of the artificial brush 10 are opened. At the end of the movement, the branches are set to the normal position, and the microswitches 12 and 14 return to their original state. By moving the branches in the opposite direction, the disabled person carries out the closing of the opposite microswitches 13 and 15, which, when activated, connects the actuator 11 to the opposite poles of the power supply 16, reverses the first, the actuator 11 realizes the opposite movement is the grip of the fingers.

Thus, the control lever allows, due to the minor power effects of the ulnar and radial branches of the forearm stump, to control the switching of the microswitches 12-15, which connect the prosthetic actuator 11 to the power source 16, thereby realizing the gripping or opening of the hand. This increases the functionality of prostheses for people with disruptions of the forearm stump, according to Krukenburg. This eliminates false actuations of the electric drive during random, involuntary movements of the stump, for example

2

FIG. 2

12

viewA

G5

/four

FIG. five

L

H

eleven

about

f

/

13

rt

FIG. 6

Claims (1)

Claim A forearm prosthesis for a split stump containing a sleeve. Of the forearm with a stump receiver, an artificial brush attached to it with a base and an electric drive, a control lever mounted in the forearm sleeve with lodges of the branch of the stump and electrical contact elements, through which the electric drive is connected to a power source, characterized in that , in order to eliminate false alarms of the electric drive during any involuntary, natural movements of the stump in the receiver, in it the control lever is made in the form of two parallels parting strips with arcuate platforms, pivotally mounted on the base of the artificial brush, and electrical contact elements - in the form of 1Q two pairs of microswitches fixed to the base of the artificial brush, while the normally open contacts of each pair of microswitches are connected to each other and to 15 electric drives according to circuit I, and microswitch buttons are contacted with arcuate pads. __8iZA