Holding device for medical instruments

1. A holding device for medical instruments, the holding device comprising:

a bracket on which at least one medical instrument can be affixed,

at least one joint to position the bracket, and

a weight-relieving system to compensate a bracket load, the weight-relieving system being configured as a resetting element coupled with the bracket and made of a material that comprises a plateau stress, the resetting element being pre-tensed by the bracket load until the resetting element reaches the plateau stress, wherein the resetting element is mounted at one end in a non-movable configuration on a first bracket part and at an opposite end on a second bracket part that is displaceable with respect to the first bracket part by the at least one joint;

wherein the resetting element is disposed in a guide tube that provides guidance of said weight-relieving system, wherein the guide tube is slidable along an axis of a housing of the first bracket part; and

wherein the resetting element is mounted to the displaceable second bracket part by a flexible element, the flexible element coupled to both the resetting element and the displaceable second bracket part provides a uniform, non-jerking transmission of forces exerted by the displaceable second bracket part to the resetting element.

2. The holding device according to claim 1 , wherein the material of the resetting element, which comprises the plateau stress, is selected from a group comprising a CuZnAl, FeNiCoTi and NiTi alloy.

3. The holding device according to claim 2 , wherein the material that comprises the plateau stress is a shape-memory alloy.

4. The holding device according to claim 3 , wherein the shape-memory alloy that constitutes the resetting element is an NiTiNol alloy.

5. The holding device according to claim 1 , wherein the resetting element, bridging the at least one joint, is coupled with the bracket.

6. The holding device according to claim 1 , wherein the resetting element is configured as a cable winch.

7. The holding device according to claim 1 , wherein the resetting element is configured as a spring element.

8. The holding device according to claim 6 , wherein tensing of the cable winch by the slidable guide tube is adjustable.

9. The holding device according to claim 1 , wherein the flexible element is configured as a link chain.

10. The holding device according to claim 1 , wherein:

the first bracket part has an abutment to which is connected the one end of the resetting element that is mounted in the non-movable configuration; and

the guide tube is configured to be pressed away from the abutment to adjust a tensing of the resetting element.

11. A holding device for medical instruments, the holding device comprising:

a bracket on which at least one medical instrument can be affixed,

at least one joint to position the bracket, and

a weight-relieving system to compensate a bracket load, the weight-relieving system being configured as a resetting element coupled with the bracket and made of a material that comprises a plateau stress, the resetting element being pre-tensed by the bracket load until the resetting element reaches the plateau stress, wherein the resetting element is mounted at one end in a non-movable configuration on a first bracket part and at an opposite end on a second bracket part that is displaceable with respect to the first bracket part by the at least one joint;

wherein the resetting element is disposed in a guide tube that provides guidance of said weight-relieving system, wherein the guide tube is slidable along an axis of a housing of the first bracket part; and

wherein the resetting element within the guide tube is positioned on an outer contour of the first bracket part.

12. The holding device according to claim 11 , wherein the material that comprises the plateau stress is a shape-memory alloy.

13. The holding device according to claim 11 , wherein the resetting element, bridging the at least one joint, is coupled with the bracket.

14. The holding device according to claim 11 , wherein the resetting element is configured as a cable winch.

15. The holding device according to claim 14 , wherein tensing of the cable winch by the slidable guide tube is adjustable.

16. The holding device according to claim 11 , wherein the resetting element is configured as a spring element.

17. The holding device according to claim 11 , wherein the flexible element is configured as a link chain.

18. The holding device according to claim 11 , wherein:

the first bracket part has an abutment to which is connected the one end of the resetting element that is mounted in the non-movable configuration; and

the guide tube is configured to be pressed away from the abutment to adjust a tensing of the resetting element.