CN218609476U - Filter type sucking and dropping tube - Google Patents

Abstract

The utility model relates to a filtering type pipette, which comprises a pipette main body, wherein a capillary pipette and a liquid discharge channel are arranged on the pipette main body; the capillary suction pipe is in a through shape, and a first opening and a second opening which are connected with the outside are respectively arranged at the two ends of the capillary suction pipe; the liquid drainage channel is in a through shape, a liquid drainage inlet and a liquid drainage outlet which are connected with the outside are respectively arranged at the two ends of the liquid drainage channel, and a filtering piece is arranged on the liquid drainage channel. The improved pipette can filter a sample to be detected, so that the sample liquid can be analyzed and detected in a purer state, and the probability of hole blockage is reduced.

Description

Filter type sucking and dropping tube

Technical Field

The utility model relates to a sucking and dropping tube.

Background

In the instant detection scenes of families, communities, health centers and the like, the venous blood sampling mode is inconvenient to adopt, the required sample volume is only microliter magnitude, and the disposable pipette is mainly adopted for sampling peripheral blood at present. After the blood sample is taken and the reagent reacts, the pipette is directly used for testing. However, in the actual sampling process, cotton wool remaining on the cotton swab, sweat and grease on the surface of the skin, or foreign particles of the pipette itself are often mixed into the sample, and the influence of the situation is not significant in an immunofluorescence analysis scene and a biochemical colorimetric scene, but a serious problem is brought in the field of a blood analyzer. In practical use, when the impurity particles pass through the most central detection micropore of the blood analyzer along with the sample liquid, the blockage of the micropore can be caused, and the test fails. Therefore, the existing pipette has room for improvement.

SUMMERY OF THE UTILITY MODEL

One technical problem addressed by one aspect of the present disclosure is to provide an improved pipette having a filtering function.

The utility model provides a technical scheme that its technical problem adopted is: the filtering type pipette comprises a pipette main body, wherein a capillary pipette and a liquid discharge channel are arranged on the pipette main body; the capillary suction pipe is in a through shape, and a first opening and a second opening which are connected with the outside are respectively arranged at the two ends of the capillary suction pipe; the liquid drainage channel is in a through shape, a liquid drainage inlet and a liquid drainage outlet which are connected with the outside are respectively arranged at the two ends of the liquid drainage channel, and a filtering piece is arranged on the liquid drainage channel.

According to the filter type pipette, the filter element is a filter screen fixed at one end of the liquid discharge channel.

According to the filter type pipette, the filter screen is arranged at the liquid discharge outlet, the filter screen is fixed through the annular double-faced adhesive tape, the double-faced adhesive tape is adhered between the end face of the side wall of the liquid discharge outlet and the filter screen, and the inner diameter of the double-faced adhesive tape is larger than that of the liquid discharge outlet.

According to the filter type pipette, the filter screen is arranged at the liquid discharge outlet and is fixed through the annular double-sided adhesive tape; the pipette main body is provided with a sleeve section, the sleeve section is sleeved on the periphery of the liquid discharge outlet, the end face of the sleeve section is flush with the end face of the liquid discharge outlet, and the double-faced adhesive tape is bonded on the end face of the sleeve section and between the filter screens.

The filtering pipette as described above, the interior of the pipette main body is longitudinally penetrated to form the liquid discharge channel, the liquid discharge inlet is arranged at the bottom of the pipette main body, the top of the pipette main body is provided with an extending section extending upwards, and the liquid discharge outlet is arranged at the extending section; the bottom of the pipette main body is connected with at least one fixing arm extending downwards, the fixing arm is fixedly connected with the capillary pipette, and the capillary pipette is in a longitudinally extending shape.

As mentioned above, in the filter type pipette, the number of the fixing arms is one, the fixing arms are fixedly connected to the side wall of the capillary, the capillary is spaced from and opposite to the liquid discharge channel, and the fixing arms and the capillary are staggered with the liquid discharge channel; the liquid drainage inlet of the liquid drainage channel is provided with the filter screen.

According to the filter type pipette, the bottom of the pipette main body is connected with the two fixing arms, and the capillary pipette is fixedly arranged between the two fixing arms; the capillary suction pipe and the liquid discharge channel are positioned on the same axis, and a spacing window is arranged between a second opening at the upper end of the capillary suction pipe and a liquid discharge inlet of the liquid discharge channel; the filter screen is arranged at the liquid discharge outlet.

The filter type pipette as described above, further comprising a tube cap and a tube sleeve; the tube cap covers the top of the pipette body, and the tube sleeve covers the bottom of the pipette body.

One advantageous effect brought by one aspect of the present disclosure: the improved pipette can filter a sample to be detected, so that the sample liquid can be analyzed and detected in a purer state, and the probability of hole blockage is reduced.

Drawings

Certain embodiments of the invention will now be described in detail, by way of example and not limitation, with reference to the figures, in which like reference numerals identify identical or similar parts or features. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.

In the drawings:

fig. 1 is a schematic view of a first viewing angle of an embodiment of a pipette body of the present invention;

FIG. 2 is a schematic view of a second viewing angle of the pipette body according to the embodiment of the present invention;

FIG. 3 is a schematic view of a second embodiment of the pipette body of the present invention;

FIG. 4 is a first schematic view of the pipette of the present invention;

FIG. 5 is a second schematic view of the pipette of the present invention;

FIG. 6 is a third schematic view of the pipette of the present invention;

the designations in the figures illustrate the following:

1. a pipette main body; 100. a pipe cap; 101. pipe sleeve; 2. a capillary pipette; 20. a second opening; 21. a first opening; 3. a liquid discharge channel; 30. a liquid discharge inlet; 31. a liquid discharge outlet; 4. a filter screen; 5. a fixed arm; 6. and (4) spacing windows.

Detailed Description

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them.

Based on the described embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs.

The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Referring to the attached drawings 1-6, a filtering type pipette is shown, which comprises a pipette main body 1, wherein a capillary pipette 2 and a liquid discharge channel 3 are arranged on the pipette main body 1; the capillary pipette 2 is in a through shape, and the two ends of the capillary pipette are respectively provided with a first opening 21 and a second opening 20 which are connected with the outside of the pipette main body; the liquid discharge channel 3 is through, two ends of the liquid discharge channel are respectively provided with a liquid discharge inlet 30 and a liquid discharge outlet 31 which are connected with the outside of the pipette main body, and the liquid discharge channel 3 is provided with a filter element.

Taking a blood sample as an example, when the pipette is used, the capillary tube 2 is aligned with blood, and when the capillary tube 2 contacts with the blood sample liquid, the sample is quantitatively sucked through capillary action (the part is the prior art, and is not described in detail), the volume of the sucked sample is determined by the inner diameter and the length of the capillary tube 2, and the volume of the sample sucked by the pipette can be changed by changing the inner diameter and the length of the capillary tube 2. After sampling, the capillary pipette 2 of the pipette is partially inserted into the reagent tube, the sample flows out from the first opening 21 and the second opening 20 to be fully contacted with the reagent in the reagent tube, and the reaction and the uniform mixing of the sample and the reagent are realized by reversing the uniform mixing mode, so that the sample liquid to be detected is formed. The sample liquid to be tested is extruded from the liquid discharge channel 3 in a mode of extruding the tube wall of the reagent tube subsequently, the sample liquid can flow through the filter piece in the extrusion process, impurities which possibly cause hole blockage of the blood analyzer can be filtered, and the filtered sample liquid is subjected to machine test, so that the hole blockage probability is greatly reduced. In addition, the sucking and dropping pipe and the filtering piece are disposable consumables, extra maintenance is not needed, and the use is convenient.

In some embodiments, the filter element is a filter net 4, and the filter net 4 is fixed to one end of the liquid discharge channel 3. The filter screen 4 can be mounted by glue bonding, snap connection or hot melting, and can be mounted at the liquid discharge inlet 30 end of the liquid discharge channel 3 or at the liquid discharge outlet 31 end.

In some embodiments, the filter screen 4 is disposed at the drainage outlet 31, the filter screen 4 is fixed by an annular double-sided adhesive tape, the double-sided adhesive tape is adhered between the end surface of the side wall of the drainage outlet 31 and the filter screen 4, and the inner diameter of the double-sided adhesive tape is greater than the inner diameter of the drainage outlet 31. The interference of the end surface position of the liquid discharge outlet 31 is less, and the filter screen 4 is convenient to operate and fix. When the filter screen 4 is packaged, the filter screen is connected by adopting an annular double-sided adhesive tape, and a hole in the center of the annular double-sided adhesive tape is slightly larger than the aperture of the liquid discharge channel 3 of the pipette, so that the sample liquid is prevented from contacting the double-sided adhesive tape, the sample liquid is prevented from being polluted, and the adhesive force of the double-sided adhesive tape is reduced. Meanwhile, the contact area between the annular double-sided adhesive tape and the filter screen 4 is not too small, so that the filter screen 4 cannot fall off when the sample liquid passes through the filter screen 4; the contact area is not too large, which causes unnecessary waste.

There are various ways of attaching the drainage outlet 31 to the filter web 4. For example, in the above solution, the side wall of the drainage channel 3 at the position of the drainage outlet 31 is thickened, and the double-sided adhesive tape is adhered between the end surface of the side wall of the drainage channel 3 and the filter screen 4. The middle position of the filter screen 4 is aligned with the liquid discharge channel 3 to filter the passing sample liquid, and the edge of the filter screen 4 is fixedly bonded with the end face of the channel wall of the liquid discharge channel 3.

As another example, in this embodiment, the filter screen 4 is disposed at the drainage outlet 31, and the filter screen 4 is fixed by an annular double-sided adhesive tape; the pipette main body 1 is provided with a sleeve section, the sleeve section and the pipette main body can be integrally formed to save cost, the sleeve section is sleeved on the periphery of the liquid discharge outlet 31, the end face of the sleeve section is flush with the end face of the liquid discharge outlet 31, and the double-faced adhesive tape is bonded between the end face of the sleeve section and the filter screen 4. The lateral wall thickness of flowing back passageway 3 itself is thinner, can set up the cover barrel section in the periphery, and filter screen 4 covers flowing back export 31, and the double faced adhesive tape then bonds between the terminal surface of filter screen 4 limit and cover barrel section.

A filter screen 4 is added on a liquid discharge channel 3 of the pipette, so that the blood sample is filtered. The type selection of filter screen 4 will combine the aperture of hematology analyzer inspection hole to select, and the aperture of filter screen 4 should be less than the aperture of instrument inspection hole, just can effectively prevent the emergence of stifled hole problem. However, the pore diameter of the filter screen 4 is not as small as possible, and is better, when the sample liquid passes through the filter screen 4, if the pore diameter of the filter screen 4 is too small, the sample liquid will generate micro bubbles when passing through the filter screen 4, and when the bubbles pass through the detection hole of the instrument, although no hole blockage is caused, signal interference will be caused, and the test data is higher. The pipette can be suitable for filtering impurities during quantitative collection of blood, body fluid and various sample liquids, and the aperture/side length of the filter screen is 4 selected according to the particulate matters to be filtered and the application scene, wherein the typical range is 0.1-200 microns.

In some embodiments, the liquid discharge channel 3 is formed by longitudinally penetrating the interior of the pipette main body 1, the liquid discharge inlet 30 is arranged at the bottom of the pipette main body 1, the top of the pipette main body 1 has an extension section protruding upwards, and the liquid discharge outlet 31 is arranged at the extension section; the bottom of the pipette body 1 is connected with at least one fixing arm 5 extending downwards, the fixing arm 5 is fixedly connected with the capillary pipette 2, and the capillary pipette 2 is in a longitudinal extending shape.

For example, the fixed arm 5 is one, the fixed arm 5 is fixedly connected to the side wall of the capillary suction tube 2, the capillary suction tube 2 is opposite to the liquid discharge channel 3 in a spaced manner, and both the fixed arm 5 and the capillary suction tube 2 are staggered from the liquid discharge channel 3, that is, the fixed arm 5 and the capillary suction tube 2 are not on the extension line of the liquid discharge channel 3; the liquid discharge inlet 30 of the liquid discharge channel 3 is provided with the filter screen 4.

For another example, the bottom of the pipette body 1 is connected with two fixing arms 5, and the capillary pipette 2 is fixedly mounted between the two fixing arms 5; the capillary suction pipe 2 and the liquid discharge channel 3 are positioned on the same axis, and a spacing window 6 is arranged between a second opening 20 at the upper end of the capillary suction pipe 2 and a liquid discharge inlet 30 of the liquid discharge channel 3; the filter screen 4 is disposed at the drain outlet 31.

The capillary suction pipe 2 can be fixed by a fixing arm 5, the fixing arm 5 and the capillary suction pipe 2 are staggered with the liquid drainage channel 3, the filter screen 4 can be selectively installed at the liquid drainage inlet 30, and the staggered fixing arm 5 and the staggered capillary suction pipe 2 vacate corresponding space so as to install the filter screen 4. The capillary pipette 2 can also be fixed by two or more than two fixing arms 5, the fixing arms 5 and the capillary pipette 2 are arranged at the central position of the lower end of the pipette main body 1 and are positioned on the same axis with the liquid discharge channel 3, and the middle spacing window 6 ensures that the capillary pipette 2 and the liquid discharge channel 3 are in a through state, so that when a sample is sucked by capillary action, the air pressure balance in the capillary pipette 2 is kept. In addition, the connection between the fixing arm 5 and the capillary suction tube 2 can be interference fit or injection molding and integral molding.

In some embodiments, the pipette tube further comprises a cap 100, a sleeve 101; the tube cap 100 covers the top of the pipette main body 1, and the tube sleeve 101 covers the bottom of the pipette main body 1. The cap 100 is connected to the upper end of the pipette body 1, and a possible connection manner is a threaded connection or an interference fit, so as to protect the liquid discharge outlet 31 from external pollution. The top of the cap 100 may be a planar structure or a conical structure, and when the top of the cap 100 is a conical structure, the cap 100 may be used to pierce an aluminum sealing film of a reagent bottle. The inner wall surface of the tube housing 101 is in close contact with the outer wall surface of the lower end of the pipette main body 1 for protecting the capillary pipette 2.

The conventional pipette is used according to the following flow:

pricking the fingers with a special needle instrument to squeeze out blood; the pipe sleeve 101 is opened, the sucking and dropping pipe is held by hands to contact the opening of the capillary suction pipe 2 with blood, and the blood can be automatically sucked quickly; inserting the pipette into a test tube body which is coated with an aluminum film and is filled with reagents (such as a diluent, a hemolytic agent and the like, and selecting corresponding reagent types according to application occasions), and slightly pressing; holding the pipette body by hand, and slightly shaking the pipette up and down or left and right for five or six times to obtain a uniform diluted blood sample; the flat-head cap of the pipette is pulled down, the pipette is inverted, and the tube body of the pipette is lightly pinched, so that the diluted blood sample can be easily dripped out; or, the flat head cap is covered, and the specimen is stored in the refrigerator by using the pipette, so that the pollution can be avoided.

The material of the pipette can be all plastic material, or the combination of plastic and glass, or not limited to the other materials described herein; the material of the filter screen 4 can be nylon, terylene, or other materials not limited to the description; the color of the pipette and the filter screen 4 may be transparent, white, milky white, or any other color, and may not be limited to the other colors described herein.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, which may be modified, combined, and varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (8)

1. Filtration type pipette, including pipette main part, its characterized in that:

the pipette body is provided with a capillary pipette and a liquid discharge channel;

the capillary suction pipe is in a through shape, and a first opening and a second opening which are connected with the outside are respectively arranged at the two ends of the capillary suction pipe; the liquid drainage channel is in a through shape, a liquid drainage inlet and a liquid drainage outlet which are connected with the outside are respectively arranged at the two ends of the liquid drainage channel, and a filtering piece is arranged on the liquid drainage channel.

2. The filtration pipette of claim 1 wherein:

the filtering piece is a filtering net which is fixed at one end of the liquid discharge channel.

3. The filtration pipette of claim 2 wherein:

the filter screen set up in the flowing back exit, the filter screen is fixed through annular double faced adhesive tape, double faced adhesive tape bond in the lateral wall terminal surface of flowing back exit with between the filter screen, double faced adhesive tape's internal diameter is greater than the internal diameter of flowing back exit.

4. The filtration pipette of claim 2 wherein:

the filter screen is arranged at the liquid discharge outlet and is fixed by an annular double-sided adhesive tape;

the pipette main body is provided with a sleeve section, the sleeve section is sleeved on the periphery of the liquid discharge outlet, the end face of the sleeve section is flush with the end face of the liquid discharge outlet, and the double-faced adhesive tape is bonded on the end face of the sleeve section and between the filter screens.

5. The filtration pipette of claim 2 wherein:

the interior of the pipette main body is longitudinally communicated to form the liquid discharge channel, the liquid discharge inlet is arranged at the bottom of the pipette main body, the top of the pipette main body is provided with an extending section which extends upwards, and the liquid discharge outlet is arranged at the extending section;

the bottom of the pipette main body is connected with at least one fixing arm extending downwards, the fixing arm is fixedly connected with the capillary pipette, and the capillary pipette is in a longitudinally extending shape.

6. The filtration pipette of claim 5 wherein:

the fixing arm is one, the fixing arm is fixedly connected to the side wall of the capillary suction pipe, the capillary suction pipe is opposite to the liquid drainage channel in a spaced mode, and the fixing arm and the capillary suction pipe are staggered with the liquid drainage channel; the liquid drainage inlet of the liquid drainage channel is provided with the filter screen.

7. The filtration pipette of claim 5 wherein:

the bottom of the pipette main body is connected with two fixing arms, and the capillary pipette is fixedly arranged between the two fixing arms; the capillary suction pipe and the liquid discharge channel are positioned on the same axis, and a spacing window is arranged between a second opening at the upper end of the capillary suction pipe and a liquid discharge inlet of the liquid discharge channel;

the filter screen is arranged at the liquid discharge outlet.

8. The filtration pipette of claim 1 wherein:

the pipette also comprises a tube cap and a tube sleeve;

the tube cap covers the top of the pipette body, and the tube sleeve covers the bottom of the pipette body.

Images