Preprocessing device

Patent metadata

Field	Value
Publication number	US-12535495-B2
Application number	US-202218688492-A
Country	US
Kind code	B2
Filing date	Jun 29, 2022
Priority date	Sep 13, 2021
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A preprocessing device that carries out a dispensing process for aspirating a liquid sample accommodated in a sample container, and subsequently discharging and dispensing the sample into another sample container, the preprocessing device comprising: a dispensing nozzle; a dispensing nozzle tip detachably provided to the distal end of the dispensing nozzle; a disposal box in which the dispensing nozzle tip is disposed of after having been removed from the dispensing nozzle; and a cutting mechanism for cutting a dispensing nozzle tip inserted into a removal part, which removes the dispensing nozzle tip from the dispensing nozzle, from the longitudinal-direction side. This makes it possible to improve accommodation efficiency while suppressing accumulation of disposed-of dispensing nozzle tips.

First claim

The invention claimed is:

1 . A preprocessing device configured to carry out a dispensing process for aspirating a liquid specimen accommodated in a specimen container, and subsequently discharging and dispensing the specimen into another specimen container, the preprocessing device characterized by comprising:
a dispensing nozzle; a dispensing nozzle tip detachably provided to a tip of the dispensing nozzle; a disposal box in which the dispensing nozzle tip is disposed of after having been removed from the dispensing nozzle; and a cutting mechanism for cutting a dispensing nozzle tip inserted into a removal part from a longitudinal-direction side, the removal part configured to remove the dispensing nozzle tip from the dispensing nozzle.

2 . The preprocessing device according to claim 1 , characterized in that
the cutting mechanism comprises: a first blade including a first blade surface and a second blade surface continuously formed so as to abut from different directions on a side surface of the dispensing nozzle tip, the first blade rotatably provided in a direction along a plane including the first blade surface and the second blade surface; and a second blade having a blade surface formed so as to abut on a side surface of the dispensing nozzle tip from a different direction from the first blade surface and the second blade surface of the first blade, the second blade relatively fixed to the first blade, wherein the first blade is rotated in a direction of the second blade in a state where the dispensing nozzle tip is placed between the first blade and the second blade, and thereby the dispensing nozzle tip is cut while being held within a range defined by the first blade surface and the second blade surface of the first blade and the blade surface of the second blade.

3 . The preprocessing device according to claim 2 , characterized by further comprising:
a plurality of the cutting mechanisms; a connecting member configured to connect the respective first blades of the plurality of cutting mechanisms; and an actuator configured to rotate the respective first blade of the plurality of cutting mechanisms via the connecting member so as to cut a plurality of dispensing nozzle tips respectively placed on the plurality of cutting mechanisms at once.

4 . The preprocessing device according to claim 2 , characterized in that
the cutting mechanism comprises: a first tip holding member rotatably provided coaxially with the first blade and abutted on a side surface of the dispensing nozzle tip along the first blade surface of the first blade, the first tip holding member restrained from rotation relative to the first blade from a position along the first blade surface of the first blade to the dispensing nozzle tip side; a second tip holding member provided to abut on a side surface of the dispensing nozzle tip from a direction opposite to the first tip holding member, the second tip holding member provide along the blade surface of the second blade; and an elastic member energizing the first tip holding member to the dispensing nozzle tip side, causing the first tip holding member to rotate as the first blade rotates toward the dispensing nozzle tip side, and thereby gripping the dispensing nozzle tip with the second tip holding members.

Assignees

• Hitachi High Tech Corp

Inventors

• Tamura Kazuma
• Watanabe Hiroshi

Classifications

• G01N2035/103

  using disposable tips · CPC title

• B23B5/14

  Cutting-off lathes ({B23D21/00 takes precedence} shearing B23D) · CPC title

• G01N35/1065 Primary

  Multiple transfer devices · CPC title

• B26D2001/0066

  having shearing means, e.g. shearing blades, abutting blades · CPC title

• B26D1/02

  having a stationary cutting member (B26D1/547 takes precedence) · CPC title