Basic Construction And Operational Principle; Basic Construction; Operational Principle - Nabtesco NK-6 Symphony Guia Del Usuario

2.

Basic Construction and Operational Principle

2-1 Basic Construction

The NK-6 Symphony consists of a 6-bar
linkage which controls the stance phase and
a hydraulic cylinder which controls the swing
phase. The selective lock with which the
user can lock the knee by himself/herself
can be chosen at the user's option. (Model:
NK-6+L, NK-6SH+L)
Hydraulic cylinder
Stance-flexion rubber
Stance-flexion stiffness
adjusting screw
Fig. 1 Main Components

2-2 Operational Principle

The geometric self-locking system reliably
functions while the prosthesis is in contact
with the floor, thus preventing abrupt
buckling. When the prosthesis leaves the
floor, the hydraulic
providing cadence responsive swing control.
Stance-Flexion
Fig. 2 Walking on a Level Floor
Selective lock
(optional)
6-bar linkage
(p-MRS system)
Extension assist
spring adjusting
screw
cylinder functions,
Hydraulic cylinder
EN – 7
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