Cooling device intended to equip an infrared vision device with a deformable element

The cooling device comprising:

• a casing,
• a crank movable in rotation relative to the casing,
• a piston,
• a coupling member mounted in rotation on the crank, the coupling member having a first edge facing the piston and a second edge opposite the first edge,
• a deformable element embedded in the coupling member and embedded in the piston, the deformable element being configured to move the piston in translation relative to the casing while deforming, when the crank is rotated relative to the casing,
• the cooling device characterized in that the deformable element is embedded in the second edge of the coupling member, and in that the deformable element comprises:
• a first portion extending along the second edge of the member parallel to an axis of rotation of the crank,
• a second portion (98) lengthening the first portion and extending toward the piston,
• a third portion lengthening the second portion and extending parallel to the axis of rotation of the crank, so that the three portions form a U overlapping the coupling member.