Cartridge retaining mechanism for nucleic acid extracting apparatus

1. 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.

2. The cartridge retaining mechanism according to claim 1 ,

wherein the cartridge cap has a configuration to be fitted to the cartridge main body.

3. The cartridge retaining mechanism according to claim 2 ,

wherein the cartridge cap has a fitting protrusion and the cartridge main body has a fitting groove.

4. The cartridge retaining mechanism according to claim 2 ,

wherein the cartridge cap has a fitting groove and the cartridge main body has a fitting protrusion.