Design development via considering a handle shaped to fit the grip.
streamlines or curved surfaces look like easy-Grip Shape,
but door handles are not always grasped in fact.
Pushing down with palm or back of the hand,
Pushing down with elbow while holding a package,
There are various ways to open the door with handles.
I designed a full-flat surfaced shape
in making a thorough investigation of easy-Grip.
It would be an appropriate form to accept to your every behavior.