A packaging unit for liquid sample loading devices applied in an electron microscope, wherein the packaging unit comprises:
- an upper jig, comprising:
- a rotating component, comprising a first chamber, wherein the first chamber has a first accommodation space and a first opening, and a first internal thread is disposed in the first chamber;
- a stretchable component, disposed in the first accommodation space, and the stretchable component comprising:
- a joint piece having a first external thread, wherein the first external thread matches the first internal thread, so as to movably arrange the stretchable component in the first chamber;
- a stretchable piece having one end and the other end oppositely disposed to the end, wherein the end is fixed to the joint piece, a portion of the stretchable piece near the other end has a slide track, and the slide track is disposed along a longitudinal direction;
- and
- a first holding element for holding a first liquid sample loading device, wherein the first holding element is fixed to the other end of the stretchable piece, and the first holding element and at least one portion of the stretchable piece protrude from the first opening;
- and
- a casing, comprising:
- a second chamber, comprising:
- a second accommodation space in which the rotating component and the stretchable component are disposed;
- and
- a second opening and a third opening oppositely disposed to the second opening, wherein a second internal thread is disposed in the third opening, and the first holding element is close to the third opening;
- and
- a first fixing pillar near the third opening and located above the first holding element, wherein the first fixing pillar passes through a side of the casing and is slidingly arranged in the slide track;
- a bottom jig, comprising a base and a second holding element for holding a second liquid sample loading device, wherein the second holding element is disposed above the base,
- wherein a second external thread is disposed on an outer wall of the base under the second holding element, and the second internal thread matches the second external thread so that the first holding element and the second holding element are oppositely disposed.