Ottobock 12K41 Instructions D'utilisation page 24

Product description
Models
2.1.2.1 Definition of terms
AFB (Automatic Forearm Balance)
The AFB flexion aid stores the energy that is released when the prosthetic arm is extended and uses it to assist
with flexion. The complex mechanism of the flexion aid controls the dynamics of forearm movement and equalises
the leverage forces that develop via a compensation gear. As a result, the patient only has to exert minimal force on
the flexion cable or through body momentum. The compensation coefficient can be easily adjusted to the individual
weight of the prosthetic forearm and different clothing.
Easy Plug
The Easy Plug is the control electronics for the 12K44=* and 12K50=* elbow joints.
The connecting cables of the electrodes, switches and batteries are connected to the Easy Plug. Its interior cable
routing minimises the risk of cable breaks.
Lock
The product is either locked mechanically or electronically (see Page 23). The internal ratchetless lock can be
unlocked or locked in any position, even under a load. The product has a load capacity of up to 230 N in the locked
state (this value may decline over the course of several years due to wear and tear). The lock will slip under higher
loads.
Mechanical lock
A strong pull on the cable (audible clicking sound) locks or unlocks the joint.
Thanks to the integrated compensation mechanism, the lock can be released with little effort, even under load. The
integrated strain relief reduces the risk of damage when the pull cable is pulled too hard.
Electronic lock
The lock can be released and engaged using electrode signals or switch signals (depending on the chosen switch­
ing version).
Slip-stop function
The slip-stop function makes it possible to lower the forearm in a controlled manner without having to fully release
the lock.
24
AFB Easy Plug
1. Battery connection
2. CLOSE electrode connection
3. OPEN electrode connection
4. Switch connection
Lock Slip-stop
Mechanical Mechanical
or or
Electronic Electronic
12K41, 12K42, 12K44, 12K50