The invention discloses a
hardness-variable protective
nucleic acid detector and a use method thereof, and belongs to the field of
nucleic acid detection. In the process of wiping the
throat of a
human body to extract secretions, when the
human body makes some
vomiting actions due to
nausea and sensitivity, the
oral cavity excessively contacts with and squeezes a double-state sampling rod, an air bag head is subjected to buffer deformation, and thus, on one hand, primary protection on the
oral cavity and
throat is achieved, on the other hand, along with compression deformation of the air bag head, a rubber sealing ball and a sliding ball gradually move, air in an inflation
pipe sleeve and the air bag head is finally released, the inflation
pipe sleeve and the air bag head can be shrunk under compression, and the whole double-state sampling rod cannot maintain a linear state due to loss of air support, loses
hardness and support force, so that the double-state sampling rod is in a free and soft state, is unlikely to squeeze the
oral cavity, and secondary protection for the oral cavity is realized. The
detector is of a detachable structure, part of the structure of the
detector can be recycled, so that the production cost is reduced.