Metacarpus element with volume for a hand prosthesis

1 . A metacarpus element for a hand prosthesis,

wherein the metacarpus element comprises at least one connecting element for connecting the metacarpus element to at least one finger frame element, wherein

the metacarpus element comprises a basic metacarpus body and a metacarpus cover, and the basic metacarpus body, together with the metacarpus cover, define a volume,

a sealing ring is arranged between the basic metacarpus body and the metacarpus cover to seal a gap between the metacarpus body and the metacarpus cover, the sealing ring has a gap that forms a cable passage opening through which cables pass through the gap between the metacarpus body and the metacarpus cover into the defined volume.

2 . The metacarpus element according to claim 1 , wherein the cable passage opening is on a side of the sealing ring that faces toward the finger elements.

3 . The metacarpus element according to claim 2 , wherein the cable passage opening is sealed with a water-insoluble mass.

4 . The metacarpus element according to claim 1 , wherein the basic metacarpus body is connected detachably to the metacarpus cover.

5 . The metacarpus element according to claim 4 , wherein basic metacarpus body is connected to the metacarpus cover by means of screws.

6 . The metacarpus element according to claim 1 , wherein the volume is sealed in a watertight manner.

7 . A hand prosthesis comprising a metacarpus element according claim 1 .

8 . The hand prosthesis according to claim 7 , wherein the volume accommodates a prosthesis control unit.

9 . The hand prosthesis according to claim 8 , wherein the hand prosthesis comprises finger elements which can be moved by means of an electric motor, and the electric motor is accommodated in a proximal phalanx and the control unit controls the electric motor.