JPH0428423B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an insertion seal cylinder interposed between a test liquid container and a pipette.

In hospital examination rooms and physical and chemical laboratories, the liquid to be tested is raised to a desired set level in a pipette. For example, in a blood sedimentation test at a hospital, the lower end of a pipette is inserted into a test liquid container containing blood as a test liquid, and the blood is sucked up to a predetermined level within the pipette by suction or the like.

This kind of suctioning of the test liquid is undesirable, for example, if the upper end of the pipette is sucked into the mouth, the test liquid may be drawn up into the mouth by mistake, and it is difficult to aspirate the test liquid accurately to a predetermined level. The problem is that it is relatively time consuming.

In view of the above points, the present invention has been developed by simply interposing the test liquid container between the test liquid container and the lower end of the pipette, without requiring any work such as suction, and moreover, the test liquid can be instantly brought to a predetermined level in the pipette. The present invention provides an insertion seal cylinder that allows the insertion of the seal.

Next, details of the present invention will be explained with reference to the drawings.

In FIG. 1, reference numeral 1 designates a test liquid container having a cylindrical shape, into which the lower end of a pipette 2 is inserted. An insertion seal cylinder 3 of the present invention is interposed between the test liquid container 1 and the pipette 2.

The insertion seal cylinder 3 has a cylindrical body with open upper and lower ends. In this example, the cylindrical body is
Upper body 3a and lower body 3b as shown in FIG.
It is formed from. The upper body 3a is entirely made of elastic, transparent soft plastic, and the lower body 3b is made of a transparent hard material such as hard plastic.

An annular lip portion 4 is formed at the upper end of the upper body 3a and projects radially outward and obliquely upward. This lip-shaped portion 4 constitutes an outer elastic seal portion. Further, an annular lip-shaped portion 5 is similarly formed from the inner surface of the upper main body 3a.
This lip-shaped portion 5 constitutes an inner elastic seal portion. An annular groove 6 is formed immediately below the lip portion 5.

The lower main body 3b has a protrusion 7 on the outer periphery of the upper end that engages with the annular groove 6, and an inner flange 8 that constitutes an abutment part on the inner side of the lower end. Lower body 3
b is connected to the upper body 3a as shown in FIG. 1 by resiliently fitting its protrusion 7 into the annular groove 6 of the upper body 3a.

The insertion seal cylinder 3 is used as follows. After collecting the test liquid B (for example, blood) into the test liquid container 1, the insertion seal cylinder 3 consisting of the upper and lower main bodies 3a and 3b is inserted into the container 1. in this case,
The outer elastic seal portion 4 is dimensioned so that it elastically deforms inward in the radial direction and comes into close contact with the inner circumferential wall of the container 1. The insertion seal cylinder 3 can be stopped at an appropriate position depending on the amount of test liquid B.

On the other hand, a pipette 2 is inserted into the insertion seal cylinder 3 as shown in FIG. The inner elastic seal portion 5 is dimensioned so as to tightly contact and seal the outer peripheral surface of the inserted pipette 2.
The inserted position of the pipette can be maintained.

Note that before inserting the insertion seal cylinder 3 into the test liquid container 1, insert the pipette 2 into the insertion seal cylinder 3 in advance.
Alternatively, the tube 3 may be inserted into the test liquid container 1 while pressing the abutting portion 8 of the insertion seal tube 3 with the tip of the pipette 2.

When the state shown in Figure 1 is obtained as described above,
The test liquid B is inserted into the insertion seal cylinder 3 and the pipette 2.
is pushed into the pipette 2 and rises by the volume immersed in the test liquid B plus the sealed air. Therefore, when the pipette 2 is moved up and down, the amount of the lower end of the pipette 2 immersed in the test liquid B changes, so the level of the test liquid in the pipette 2 changes, and the test liquid is brought to a predetermined level. can be raised. In addition, if the test liquid level in the pipette does not reach the predetermined value even if the lower end of the pipette 2 is in contact with the abutment part 8 as shown in FIG. Just push it up.

Since the area in which the outer elastic seal part 4 contacts the inner surface of the container 1 is larger than the area in which the inner elastic seal part 5 contacts the outer peripheral surface of the pipette 2, the frictional force in the outer elastic seal part 4 is equal to the frictional force in the inner elastic seal part 5. larger, so that even if the pipette 2 is moved up and down, the insertion sealing barrel 3 does not move relative to the container 1.

After the test liquid has risen to a predetermined level in the pipette 2 and a predetermined test has been performed, the pipette 2 is pulled out. At this time, the insertion seal cylinder 3 does not move within the container 1, and the seal portions 4 and 5 prevent the test liquid B in the container 1 from scattering to the outside. Of course,
The test liquid in the pipette remains in the container 1. Then, since the insertion seal cylinder 3 remains inside the container 1,
Discard as is.

In this manner, the insertion seal cylinder of the present invention is discarded together with the test liquid container after each test, so there is no need for cleaning. Further, it is convenient because an insertion seal cylinder of the same size can be used regardless of the length of the test liquid container or the amount of test liquid inside the test liquid container.

In the embodiment of the present invention shown in FIG. 3, the insertion seal cylinder 3 is provided with an integral single cylindrical body having a step 9 in the middle, and has an outer elastic seal part 4a and an inner elastic seal part 5a. Elastic cylinder 10 at the upper and lower ends
a is firmly fitted and fixed inside the cylindrical body. The inner elastic seal portion 5a is supported on the step portion 9.

In the embodiment shown in FIG. 4, a short elastic cylinder 10b having an outer elastic seal part 4b and an inner elastic seal part 5b at the upper and lower ends is fixed inside the main body of the straight tube-shaped insertion seal cylinder 3. ing.

As described above, according to the present invention, it is possible to raise the test liquid to a predetermined level in the pipette in a short time without touching the test liquid and regardless of the length of the test liquid container or the amount of test liquid. An insertion seal cylinder is obtained that allows for insertion.

[Brief explanation of drawings]

Fig. 1 is a longitudinal cross-sectional view of one embodiment of the insertion seal cylinder of the present invention in a used state, Fig. 2 is an exploded view of the same, Fig. 3 is a longitudinal cross-sectional view of another embodiment in a used state, and Fig. 4 FIG. 7 is a longitudinal cross-sectional view of still another embodiment in use. DESCRIPTION OF SYMBOLS 1...Test liquid container, 2...Pipette, 3...Insertion seal cylinder, 4, 4a, 4b...Outer elastic seal portion, 5, 5a, 5b...Inner elastic seal portion, 8
...Abutment part.

Claims (1)

[Scope of Claims] 1. It has a cylindrical body with open upper and lower ends, has an annular outer elastic seal part slidingly in contact with the inner circumferential wall of the test liquid container on the outside of this body, and has, on the inside of the main body, Between the test liquid container and the pipette, characterized in that it has an annular inner elastic seal part that slides on the outer circumferential wall of the pipette inserted into the pipette, and has an abutment part on the inside of the main body that comes into contact with the lower end of the pipette. The insertion seal cylinder is inserted into the cylindrical body. 2. The insertion seal cylinder according to claim 1, wherein the outer elastic seal portion is formed in a lip shape at the upper end of the cylindrical main body. 3. Claim 1 or 2, wherein the inner elastic seal portion is provided between the upper and lower ends of the cylindrical body.
Insertion seal cylinder described in section. 4. The insertion seal cylindrical body according to claim 1, wherein the abutting portion that abuts the lower end of the pipette is constituted by an inner flange at the lower end of the cylindrical body.