JPH028217Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid suction nozzle particularly suitable for use in a biochemical analyzer.

Liquid suction devices for samples, reagents, etc. used in biochemical analyzers are designed to aspirate liquid by inserting a liquid suction nozzle into a container that normally holds the liquid and activating a liquid suction means such as a syringe. Generally, there is one suction port at the tip of the liquid suction nozzle that enters the container.
In this case, if a small amount of foreign matter gets into the liquid container that holds the sample, reagent, or other liquid, and the non-single suction ports become clogged, it becomes difficult to aspirate the liquid, and further suction is required to remove the foreign matter. It has the disadvantage that it packs more tightly and makes it difficult to remove foreign objects. In addition, since there is only one suction port at the tip of the nozzle, in the case of non-uniform liquids that are not sufficiently stirred or liquids that are separated into many layers, it is possible to uniformly distribute the liquid over the entire depth at the same time. However, the disadvantage is that it is not possible to suction the desired layer of liquid.

The purpose of the present invention is to eliminate the above-mentioned drawbacks, and to provide a liquid suction nozzle that is not easily affected by clogging and that is appropriately configured to easily suck liquid from a desired location in the depth direction. .

The present invention is a nozzle for sucking liquid, which includes a main suction port formed at the tip and a plurality of small holes arranged along the outer circumferential surface of the nozzle on a plurality of different planes perpendicular to the axis of the nozzle. It is characterized by comprising the following.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIGS. 1a and 1b are a diagram showing the configuration of an example of a liquid suction nozzle of the present invention, and a cross-sectional view taken along the - line. In the figure, liquid suction nozzle 1
3 is immersed in liquid 15 in liquid container 14. A main suction port 16 is formed at the tip of the liquid suction nozzle 13, and the liquid suction nozzle 13
A plurality of small holes 18, 19, 20 are provided in alignment on the outer peripheral surface of the liquid suction nozzle 13 on different planes perpendicular to the axis of the main suction port 16 and the small holes 18, 19 provided on the side surface. , 20 to suck the liquid. Small holes 18, 19, 20
may have the same diameter, and the liquid 15 in the liquid container 14 may be formed by the liquid suction nozzle 13.
If the part you want to collect is different, for example,
If you want to mainly select and collect liquids A ₁ , A ₂ , and A ₃ , set the diameter of each row of small holes in each plane.
When D ₁₈ , D ₁₉ , D ₂₀ and the diameter of the main suction port 16 are D ₁₆ , these diameters may be selected and formed as follows depending on the part of the liquid to be sucked.

(1) When mainly collecting the liquid from part A ₁ D ₁₆ ＞D ₂₀ ＞D ₁₉ ＞D ₁₈ (2) When mainly collecting the liquid from part A ₂ D ₁₉ ≧D ₁₆ , D ₂₀ ＞D ₁₈ (3) When mainly collecting the liquid from part A ₃ , set D ₁₈ > D ₁₉ > D ₂₀ > D ₁₆ , or make D ₁₆ extremely small in this relationship.

In this way, a plurality of suction ports 16, 18, 1
9 and 20, even if some of the suction ports are blocked by foreign objects, there are other suction ports available, so the liquid can be effectively sucked, and the negative pressure caused by the suction means can be applied to the foreign objects that have blocked the several suction ports. Since the foreign matter does not increase and concentrate, there is no possibility that the foreign matter will strongly stick to the liquid suction nozzle 13 and become impossible to remove. In addition, by appropriately setting the diameters of the suction ports 16, 18, 19, and 20, it is possible to uniformly and simultaneously suction a non-uniform liquid that is not sufficiently stirred in the depth direction, as shown in Fig. 2a. At the same time, as shown in FIG. 2b, a desired layer of liquid can be mainly sucked out of the liquid that has been separated into many layers.

As described above, according to the present invention, a main suction port is provided at the tip of the nozzle, and a plurality of small holes are arranged along the outer circumferential surface of the nozzle on a plurality of different planes perpendicular to the nozzle axis. The incidence of problems caused by clogging of the suction port can be effectively reduced, liquid can always be effectively suctioned, and liquid can be easily suctioned from a desired location in the depth direction. Another advantage is that since foreign matter cannot be strongly stuck to the suction port, it can be easily removed during the subsequent discharge operation of the suctioned liquid.

[Brief explanation of the drawing]

1A and 1B are diagrams showing the structure of an example of the liquid suction nozzle of the present invention and a sectional view taken along the - line, and FIGS. 2A and 2B are lines showing non-uniform liquid and layered liquid. It is a diagrammatic sectional view. 13...Liquid suction nozzle, 14...Liquid container,
16... Main suction port, 18, 19, 20... Small hole.

Claims (1)

[Scope of utility model registration request] A nozzle for sucking liquid, comprising a main suction port formed at the tip and a plurality of small holes arranged along the outer circumferential surface of the nozzle on a plurality of different planes perpendicular to the axis of the nozzle. Liquid suction nozzle.