Scissors lift for a wheelchair

1. A scissors lift comprising a bottom frame, a top frame and a scissors mechanism arranged between said bottom frame and said top frame to displace said bottom frame and said top frame relative to each other by transfer of an actuation force, wherein said scissors mechanism comprises:

a central hollow scissors arm delimited between opposite scissors arm surfaces, wherein said central hollow scissors arm has a bottom pivotal connection connecting it to said bottom frame and a top pivotal connection connecting it to said top frame, and

two passive scissors arms being pivotally connected to said bottom frame and pivotally connected to said top frame,

wherein each of said two passive scissors arms being pivotally connected to said central hollow scissors arm on said opposite scissors arm surfaces of said central hollow scissors arm, and

wherein said scissors lift comprising a motor providing said actuation force, said motor located between said opposite scissors arm surfaces of said central hollow scissors arm.

2. A scissors lift according to claim 1 , wherein said central hollow scissors arm is a U-profile, where opposite scissors arm surfaces are interconnected at one end.

3. A scissors lift according to claim 1 , wherein said central hollow scissors arm is a U-profile, where opposite scissors arm surfaces are interconnected at both ends.

4. A scissors lift according to claim 1 , wherein said scissors lift further comprises a stroke mechanism for transferring said actuation force into displacing said bottom frame and said top frame relative to each other, said stroke mechanism comprising a lever, said lever comprises

a body comprising:

an actuation joint being displaceable by said actuation force, and

a fulcrum joint connecting said lever body to said bottom frame or said central hollow scissors arm; said lever further comprises:

a load joint connected to said body through a load element, said load joint connecting said lever to said central hollow scissors arm or said bottom frame,

a lever distance, from said fulcrum joint to said actuation joint and a load distance, from said fulcrum joint to said load joint, wherein

said stroke mechanism enables a stroke, said stroke being from a substantially closed state of said scissors lift, wherein

said stroke at least initially decreases said lever distance and/or increases said load distance.

5. A scissors lift according to claim 4 , wherein said stroke at least initially enables increasing said load distance.

6. A scissors lift according to claim 4 , wherein said stroke at least initially enables decreasing said lever distance.

7. A scissors lift according to claim 4 , wherein said lever comprises a telescopic end, whereby said stroke at least initially enables decreasing said lever distance.

8. A scissors lift according to claim 4 , wherein said lever comprises a curved guide guiding said load joint, enabling a movement of said load joint away from said fulcrum joint at least initially during said stroke, whereby said stroke at least initially enables increasing said load distance.

9. A scissors lift according to claim 4 , wherein said load element comprises

said load joint whose position is fixed relative to said fulcrum joint and

wherein said load element is connected to said knee joint and connected to said load joint, where the leg element rotates around said knee joint and where this rotation enables lengthening the load distance during at least an initial length of said stroke.

10. A wheelchair comprising a scissors lift according to claim 1 .