Test device and cartridge

Patent metadata

Field	Value
Publication number	US-12474334-B2
Application number	US-202217893252-A
Country	US
Kind code	B2
Filing date	Aug 23, 2022
Priority date	Aug 27, 2021
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A cartridge has a strip that is provided with the test region and a case in which the strip is accommodated and in which an observation window for observing the test region from an outside is formed in a surface. A emission end portion, through which illumination light for illuminating a test region, is disposed at a position separated from the observation window on a rear surface of the case. A detection unit, that optically detects the color development state of the test region irradiated with the illumination light, is disposed at a position facing the observation window on a surface side of the case. The illumination light is transmitted from the rear surface of the case to an inside of the case, reaches the test region while being diffuse-reflected by an inner surface of the case, and illuminates the test region from the surface side.

First claim

What is claimed is:

1 . A test device that is used for an immunochromatographic test using an immunochromatographic method, the test device comprising:
a loading portion into which a cartridge is loaded, the cartridge having a strip that is provided with a test region whose color development state changes depending on whether or not a sample includes a test substance and having a case in which the strip is accommodated and in which an observation window for observing the test region from an outside is formed in a surface; an illumination unit having an emission end portion through which illumination light for illuminating the test region is emitted and which is disposed at a position separated from the observation window on an outer surface of the case, wherein the emission end portion is disposed at a position within a width of a short side of the case, and that deviates from the observation window in a direction along the short side of the case on a rear surface of the case which is opposite to the surface in which the observation window is formed, wherein the illumination unit is configured to move up and down between a set position where the illumination unit comes into contact with the outer surface of the case, and a retreat position; and a detection unit that is disposed at a position facing the observation window on a surface side of the case and that optically detects the color development state of the test region irradiated with the illumination light that is emitted from the illumination unit, transmitted through the outer surface of the case and diffuse-reflected by an inner surface of the case; wherein the case is between the illumination unit and the detection unit.

2 . The test device according to claim 1 ,
wherein two emission end portions are provided, and the two emission end portions are disposed at positions of both end portions of the short side of the case with a position corresponding to the test region interposed therebetween.

3 . The test device according to claim 1 ,
wherein the emission end portion comes into contact with the outer surface of the case.

4 . The test device according to claim 1 , further comprising:
a suppression portion that suppresses leakage light of the illumination light from the emission end portion to surroundings.

5 . The test device according to claim 4 ,
wherein the suppression portion is a light-shielding elastic member having one end that constitutes a part of the emission end portion and is elastically deformed when the one end comes into contact with the outer surface of the case.

6 . The test device according to claim 1 ,
wherein the illumination unit has a semiconductor light source that emits the illumination light.

7 . The test device according to claim 1 ,
wherein the cartridge further includes a dropping port for receiving a sample, formed at a central portion of the case in a long side direction thereof, and a pressing operation portion for supplying a reagent to the strip, formed at one end portion of the case in the long side direction thereof, and the observation window is formed between the dropping port and the pressing operation portion.

8 . A cartridge that is loaded into the loading portion of the test device used for an immunochromatographic test using an immunochromatographic method, the test device including a loading portion into which the cartridge is loaded, the cartridge comprising:
a strip that is provided with a test region whose color development state changes depending on whether or not a sample includes a test substance; and a case in which the strip is accommodated and in which an observation window for observing the test region from an outside is formed in a surface; the test device having an illumination unit having an emission end portion through which illumination light for illuminating the test region is emitted and which is disposed at a position separated from the observation window on an outer surface of the case, wherein the emission end portion is disposed at a position within a width of a short side of the case, and that deviates from the observation window in a direction along the short side of the case on a rear surface of the case which is opposite to the surface in which the observation window is formed, wherein the illumination unit is configured to move up and down between a set position where the illumination unit comes into contact with the outer surface of the case, and a retreat position; and the test device having a detection unit that is disposed at a position facing the observation window on a surface side of the case and that optically detects the color development state of the test region irradiated with the illumination light that is emitted from the illumination unit, transmitted through the outer surface of the case and diffuse-reflected by an inner surface of the case, wherein the case is made of a material that transmits the illumination light incident from the outer surface to the inside and that diffuse-reflects the transmitted illumination light from an inner surface, and wherein the case is between the illumination unit and the detection unit.

Assignees

• Fujifilm Corp

Inventors

• Ikami Seishi

Classifications

• B01L2400/0406

  capillary forces · CPC title

• B01L2300/0825

  Test strips · CPC title

• B01L2200/04

  Exchange or ejection of cartridges, containers or reservoirs · CPC title

• B01L2300/168

  Specific optical properties, e.g. reflective coatings · CPC title

• B01L2300/069

  Absorbents; Gels to retain a fluid · CPC title