Cartridge retaining mechanism for nucleic acid extracting apparatus

A cartridge retaining mechanism equipped in a nucleic acid extracting apparatus for extracting a nucleic acid, the cartridge retaining mechanism comprising:

• a cartridge that comprises:
• a cartridge main body that has a cylindrical shape with a bottom, and the bottom is shaped in a funnel shape;
• a nucleic acid-adsorbing solid carrier that traps a nucleic acid, and the nucleic acid-adsorbing solid carrier is disposed at the bottom of the cartridge main body;
• and
• a cartridge cap that is detachably mounted on an open end of the cartridge main body,
• a supporting part that supports the cartridge;
• and
• a pressure-proof retaining part that pushes the cartridge cap,
• wherein a cylindrical rib with a diameter smaller than a diameter of the cartridge main body is formed on an upper plane of the cartridge cap so that the cylindrical rib protrudes from the upper plane;
• a nozzle-receiving opening to which a pressure nozzle is pressed is formed at the cylindrical rib;
• and
• an aperture through which the cylindrical rib is inserted is formed in the pressure-proof retaining part, and
• wherein when the pressure nozzle is pressed to the nozzle-receiving opening, along with the nozzle-receiving opening being exposed from the aperture, the cartridge cap is pressed by the pressure-proof retaining part and simultaneously the cartridge main body is supported by the supporting part.