Nucleic acid extraction instrument

The utility model provides a nucleic acid extraction instrument, including work platform, work arm, work arm drive assembly and work arm drive assembly, the work arm is located the work platform top,and work arm drive assembly links to each other with work arm drive assembly, and work arm drive assembly links to each other with the work arm, work arm drive assembly includes first motor, second motor, third motor, work arm drive assembly includes lower transmission mechanism and horizontal drive mechanism on the first lower transmission mechanism of going up, the second, the work arm is including the upper arm and the underarm of arranging from top to bottom, first motor is connected and to be driven the first lower transmission mechanism of going up, and the first lower transmission mechanism of going up connects the upper arm and drives the upper arm and does the up -and -down motion, the second motor is connected and is driven lower transmission mechanism on the second, and lower transmission mechanism conn