Infusion cartridge, infusion pump, and method for manufacturing infusion cartridge

An infusion pump comprising:

• an infusion cartridge comprising:
• a case provided with a recess, and
• a film structure that has flexibility, covers an opening of the recess, and, together with the recess, defines a storage space configured to store an infusion solution, wherein:
• the case includes an opening end that defines the opening of the recess, the opening end including:
• a first side surface facing inside of the recess,
• a second side surface located on a side opposite to the first side surface, and
• an end surface connecting the first side surface and the second side surface, and
• the film structure comprises:
• a fixing portion that covers the end surface and is fixed to the end surface, and
• a cover portion that covers the second side surface and is not fixed to the second side surface;
• and
• a pump body to which the infusion cartridge is attachable.

A method for manufacturing an infusion cartridge, the method comprising:

• a step of covering an opening of a recess of a case with a film structure having flexibility to define a storage space between the recess of the case and the film structure, the storage space being configured to store an infusion solution, wherein:
• the case includes an opening end that defines the opening of the recess, the opening end including:
• a first side surface facing inside of the recess,
• a second side surface facing a side opposite to the inside of the recess, and
• an end surface connecting the first side surface and the second side surface, and
• in the step of covering the opening, the film structure is fixed to the end surface while being positioned to cover the end surface and the second side surface in the opening end of the case.