Patent ID: 11965820
Assignee: HITACHI HIGH-TECH CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  B | IPC G

Claim 13:
14. An automatic analyzer that analyzes a specimen using a reaction vessel with a cylindrical shape centered on a first axis, the automatic analyzer comprising:
an incubator configured to manage the reaction vessel at a predetermined temperature and promote a reaction of a mixture of a reagent and a specimen in the reaction vessel; and
a spectrophotometer configured to emit light to the reaction vessel and measure absorbance of a reaction liquid in the reaction vessel based on light transmitted through the reaction vessel, wherein
the incubator is provided with a hole in which the reaction vessel is accommodated,
the reaction vessel is formed such that an overall length in the first axis direction is longer than an overall length in a second axis direction and an overall length in a third axis direction, the second axis being perpendicular to the first axis and the third axis being perpendicular to the first axis and the second axis, and the reaction vessel includes: an opening part which dispenses a liquid at a portion on one end side in the first axis direction; a first flat surface which has one side extending in the first axis direction and the other side extending in the second axis direction from a portion on the other end side in the first axis direction; and a second flat surface which is substantially parallel to the first flat surface at a portion facing the first flat surface in the third axis direction, portions on side surfaces of the first flat surface and the second flat surface being formed to bend in a direction toward an outer side of the reaction vessel, and a length of the first flat surface and the second flat surface in the first axis direction being less than half the overall length in the first axis direction,
translucent surfaces that transmit light emitted from the spectrophotometer are formed on an inner wall of the hole at a portion facing the first flat surface and a portion facing the second flat surface, and
an outer wall of the reaction vessel is formed such that portions expect for the first flat surface and the second flat surface are in close contact with the inner wall of the hole when the reaction vessel is accommodated in the hole.