Stand, in particular for surgical microscopes, having an energy storage element

Abstract

The invention concerns a stand arrangement ( 1 ) having a particularly arranged energy storage element ( 7 ) with specific parameters, in particular a low spring progression. The static friction is thereby reduced to a minimum.

1 . A stand for a surgical microscope, the stand comprising: 
 a vertical support;    a horizontal support articulated on the vertical support; and    an energy storage element articulated at a proximal articulation point on the vertical support and at a distal articulation point on the horizontal support, wherein the energy storage element has a spring progression of less than 10% and is arranged such that the static friction associated with movement of the horizontal support is less than 60 N.    
   
   
       2 . The stand as defined in  claim 1 , wherein the spring progression is less than 9%.  
   
   
       3 . The stand as defined in  claim 1 , further comprising a displacement apparatus mounted on the vertical support for changing the position of the proximal articulation point.  
   
   
       4 . The stand as defined in  claim 3 , wherein the displacement apparatus includes a threaded spindle and a carriage threadably mated with the spindle to move along the spindle upon rotation of the spindle, and wherein the proximal articulation point is located on the carriage to move therewith.  
   
   
       5 . The stand as defined in  claim 1 , wherein the horizontal support is configured as a parallelogram support.  
   
   
       6 . The stand as defined in  claim 1 , wherein the horizontal support has a protrusion distance from the vertical support within a range from 500 mm to 1500 mm.  
   
   
       7 . The stand as defined in  claim 6 , wherein the protrusion distance is approximately 900 mm.  
   
   
       8 . The stand as defined in  claim 1 , wherein the distal articulation point is located near a distal end of the horizontal support.  
   
   
       9 . The stand as defined in  claim 1 , wherein the energy storage element includes a gas spring apparatus.  
   
   
       10 . The stand as defined in  claim 9 , wherein the gas spring apparatus is a pneumatic spring apparatus.  
   
   
       11 . The stand as defined in  claim 1 , wherein the energy storage element includes a hydraulic spring apparatus.  
   
   
       12 . The stand as defined in  claim 1 , wherein the energy storage element includes a mechanical spring.  
   
   
       13 . The stand as defined in  claim 1 , wherein the energy storage element includes a cylinder articulated on the vertical support and a piston rod articulated on the horizontal support.  
   
   
       14 . The stand as defined in  claim 1 , wherein the energy storage element is a gas spring including a cylinder having an outside diameter within a range from 10 mm to 100 mm.  
   
   
       15 . The stand as defined in  claim 14 , wherein the outside diameter of the cylinder is approximately 40 mm.  
   
   
       16 . The stand as defined in  claim 1 , wherein the energy storage element is a gas spring including a piston rod having an outside diameter within a range from 5 mm to 50 mm.  
   
   
       17 . The stand as defined in  claim 16 , wherein the outside diameter of the piston rod is approximately 14 mm.  
   
   
       18 . The stand as defined in  claim 1 , wherein the energy storage element is a gas spring having a cylinder and a piston within the cylinder, wherein the piston includes nozzle orifices having a diameter of at least 2 mm.  
   
   
       19 . The stand as defined in  claim 18 , wherein the piston includes nozzle orifices having a diameter of approximately 4 mm.