Visual and sound alarm for stress to leg, knee or pelvis

摘要

Two metal plates (1,3) are joined to an elastic side cladding (4) and have hook and pile fastener strips (2) for attaching the feet. A stack of springs consisting of plastics plates (5,6), spiral springs (7) and contacts (8,8a) are between the metal plates. Positive and negative cable connections end in a signal transmitter. Two plastics plates joined to spiral springs or rubber pads (19) form a stack of springs.