Flexible tubing occlusion assembly

An occlusion assembly for occluding at least one collapsible tube of a medical infusion device comprising:

• an occluder having an occluding position that compresses the at least one collapsible tube, the occluder comprising:
• one or more actuators configured to apply a motive force to act against a biasing force to place the occluder in a non-occluding position, and upon release of the motive force to allow the biasing force to restore the occluder to the occluding position;
• and
• a latch configured to be captured by a retainer of the occluder;
• a door closeable over the occluder and configured to move the retainer to a non-retaining position when the door is closed, wherein
• when the door is closed the retainer is in the non-retaining position and does not capture or hold the latch, and the occluder can be moved between the occluding position and the non-occluding position;
• and
• when the occluder is in the non-occluding position, opening the door leads to the retainer moving to a retaining position that captures and holds the latch, so that the occluder remains in the non-occluding position if the motive force applied by the one or more actuators is released.