Automatic analysis apparatus

An automatic mixing apparatus configured to cause a reagent to react with a specimen, the automatic mixing apparatus comprising:

• a reaction vessel where the specimen is dispensed;
• a reagent supply portion configured to supply the reagent, the reagent supply portion including:
• a reagent table configured to be rotationally driven by a drive motor, and further configured to hold reagent vessels,
• the reagent vessels, each containing a reagent, and
• a table rotation drive motor to rotationally drive the reagent table;
• and
• a controller configured to control operation of the table rotation drive motor, wherein
• a plurality of recesses individually holding the reagent vessels are provided in the reagent table at predetermined intervals along a circumference of the reagent table so as to be concentric about a rotation axis of the reagent table,
• a plurality of magnets are disposed below the reagent table along a movement path of the reagent vessels held by the plurality of recesses and moving along the circumference in response to the reagent table being rotationally driven,
• the plurality of magnets are disposed such that an orientation of a magnetic pole of each of the plurality of magnets varies clockwise or counterclockwise along the movement path of the reagent vessels along the circumference in an increment less than 180 degrees relative to an adjacent magnet of the plurality of magnets, and provide a magnetic force, and
• a stirring bar having magnetism disposed in each of the reagent vessels is configured to, in response to the reagent table being rotated by the table rotation drive motor and the reagent vessels passing above the plurality of magnets, be rotated about an axis parallel to the rotation axis of the reagent table and perpendicular to the circumference of the reagent table by the magnetic force of the plurality of magnets, to stir the reagent.