阅读说明：本技术 一种体外诊断分析仪的清洗结构 (Cleaning structure of in-vitro diagnosis analyzer ) 是由 肖金 陈金剑 冯尧 于 2021-08-04 设计创作，主要内容包括：本发明公开一种体外诊断分析仪的清洗结构,清洗结构包括反应杯,以及设置在所述反应杯开口处的冲洗针,所述冲洗针上下往复运动抽出或者插入所述反应杯,所述冲洗针上套设有负压形成块,所述负压形成块上开设有套针孔,所述冲洗针固定连接在所述套针孔内,所述负压形成块远离所述冲洗针的一端开设有若干通孔,所述通孔与所述套针孔连通,当所述负压形成块随所述冲洗针插入到所述反应杯底部时,所述通孔的出口完全正对且紧贴在所述反应杯的尖角的上端。本发明清洗结构通过通孔的出口完全正对且紧贴在所述反应杯的尖角的上端,高效的去除反应杯拐角处的液体,避免残液影响反应杯的下次使用,有利于确保检测的准备性。(The invention discloses a cleaning structure of an in vitro diagnostic analyzer, which comprises a reaction cup and a flushing needle arranged at the opening of the reaction cup, wherein the flushing needle reciprocates up and down and is drawn out or inserted into the reaction cup, a negative pressure forming block is sleeved on the flushing needle, a needle sleeving hole is formed in the negative pressure forming block, the flushing needle is fixedly connected in the needle sleeving hole, a plurality of through holes are formed in one end, far away from the flushing needle, of the negative pressure forming block, the through holes are communicated with the needle sleeving hole, and when the negative pressure forming block is inserted into the bottom of the reaction cup along with the flushing needle, the outlet of each through hole is completely opposite to and closely attached to the upper end of the sharp corner of the reaction cup. The cleaning structure of the invention is completely opposite to and closely attached to the upper end of the sharp corner of the reaction cup through the outlet of the through hole, so that the liquid at the corner of the reaction cup is efficiently removed, the influence of residual liquid on the next use of the reaction cup is avoided, and the detection preparation is favorably ensured.)

1. A cleaning structure of an in vitro diagnostic analyzer comprises a reaction cup and a washing needle arranged at the opening of the reaction cup, wherein the washing needle reciprocates up and down to be drawn out or inserted into the reaction cup, and is characterized in that a negative pressure forming block is sleeved on the washing needle, a needle sleeving hole is formed in the negative pressure forming block, the washing needle is fixedly connected in the needle sleeving hole, one end, far away from the washing needle, of the negative pressure forming block is provided with a plurality of through holes, the through holes are communicated with the needle sleeving hole, the through holes are formed in the corners of the negative pressure forming block, when the negative pressure forming block is inserted into the bottom of the reaction cup along with the washing needle, the outlet of each through hole is completely right opposite to and clings to the upper end of the sharp corner of the reaction cup, one end, far away from the bottom of the reaction cup, is closed to form a gap in the circumferential direction of the cup wall of the reaction cup, an arc surface is arranged between any two adjacent side surfaces of the reaction cup and is in smooth transition through the arc surface.

2. The cleaning structure of in-vitro diagnostic analyzer as claimed in claim 1, wherein the bottom of the reaction cup is provided with a light-transmitting region, the gap between the negative pressure forming block and the wall of the reaction cup is gradually enlarged from top to bottom, and a water pumping part is formed at one end of the negative pressure forming block close to the light-transmitting region.

3. The cleaning structure of in vitro diagnostic analyzer according to claim 2, wherein the negative pressure forming block is contracted in an inverted trapezoid shape in the direction of the insertion of the washing needle into the reaction cup.

4. The cleansing structure of an in-vitro diagnostic analyzer according to claim 3, wherein the distance between the water-extracting portion and the inner wall of the reaction cup is between 0.5 mm and 1 mm, and the aperture of the through hole is between 0.2 mm and 1.5 mm.

5. The cleaning structure of in vitro diagnostic analyzer according to claim 1, wherein said through hole is a trumpet-shaped opening structure, and the diameter of the end near the bottom of the reaction cup is larger than the diameter of the end near the trocar hole.

6. The cleaning structure of an in vitro diagnostic analyzer according to claim 3, wherein the negative pressure forming block is fabricated by 3D printing technology.

7. The cleaning structure of an in vitro diagnostic analyzer according to claim 1, wherein the negative pressure forming block is provided with an array of air flow holes, and the size of the air flow holes near the washing needle is larger than that near the through hole.

8. The washing structure of an in vitro diagnostic analyzer, according to claim 7, wherein the airflow holes are located at the corners of the negative pressure forming block.

9. The cleansing structure for an in-vitro diagnostic analyzer according to claim 7, wherein the airflow hole is located on a side surface of the negative pressure forming block.

10. The cleaning structure for an in vitro diagnostic analyzer according to claim 7, wherein the airflow hole is located in the negative pressure forming block.

Technical Field

The invention relates to the field of in-vitro diagnosis and detection, in particular to a cleaning structure of an in-vitro diagnosis analyzer.

Background

The in vitro diagnosis analyzer is an automatic analyzer for measuring a certain specific chemical component in body fluid by adopting the principles of photoelectric colorimetry and color development. Because of its fast measuring speed, high accuracy and small reagent consumption, these automatic analyzers are widely used in hospitals, epidemic prevention stations and family planning service stations.

The in vitro diagnosis analyzer comprises an automatic biochemical analyzer, a specific protein analyzer, a blood coagulation analyzer, a chemiluminescence analyzer and the like, which are all provided with a reusable reaction cup or a dilution cup, so that trace liquid remained in the reaction cup can have great influence on the next detection result. However, since most reaction cups on the market are rectangular containers formed by bonding quartz plates, sharp turning transition can be formed between any two adjacent quartz plates, and particularly, sharp corners can be formed at the intersection of three surfaces between the four side quartz plates and the bottom quartz plate, so that stronger molecular adhesion force can be formed at the positions than other positions in the reaction cups, and liquid drops are not easy to be drawn away to cause residue. The one-step formed reaction cup made of novel transparent high polymer material inherits the structure of a quartz glass square reaction cup. The four sharp corners at the bottom of the cup can have uncontrollable micro-upgrade residues, which can bring serious interference to the detection result and is a bottleneck problem which can not be effectively solved by external diagnostic instrument manufacturers at home and abroad.

In conclusion, the existing cleaning structure can not completely absorb the residual liquid in the reaction cup, and the repeatability and the accuracy of the detection result of the in vitro diagnosis analyzer can not be further ensured.

Disclosure of Invention

The invention aims to provide a cleaning structure of an in-vitro diagnostic analyzer, which is characterized in that a negative pressure forming block is arranged on a flushing needle, when the flushing needle moves towards the direction close to the bottom of a reaction cup, the negative pressure forming block is driven to move towards the bottom of the reaction cup, and as the distance between the negative pressure forming block and the inner wall of the reaction cup is smaller, a big liquid bead attached to the inner wall of the reaction cup is scraped towards the bottom of the reaction cup in the moving process of the negative pressure forming block. When the negative pressure forming block stays at the bottom of the reaction cup, the outlets of the through holes on the negative pressure forming block just completely cover the four sharp corners of the square reaction cup, and simultaneously, the gap between the negative pressure forming block and the cup wall of the reaction cup is reduced to the minimum, so that a negative pressure area is formed between the negative pressure forming block and the inner wall of the reaction cup. When the washing needle is used for pumping air outwards, the air in the negative pressure area is quickly collected into the through hole on the negative pressure forming block due to the instant air pressure difference, and the liquid in the negative pressure area and the liquid attached to the sharp corner of the bottom of the reaction cup are brought into the through hole by the high-speed flowing air, enter the needle sleeving hole and are sucked out through the washing needle. The structure can scrape off residual liquid drops on the inner wall of the reaction cup, the liquid suction position is just above the position with the maximum liquid drop adhesive force, so that liquid is conveniently pumped out, and the air flowing at high speed in the negative pressure zone and the arc surface on the reaction cup can further promote the liquid to converge towards the washing needle, so that the repeatability and the accuracy of the detection result of the in-vitro diagnosis analyzer can be further guaranteed.

The purpose of the invention can be realized by the following technical scheme:

a cleaning structure of an in vitro diagnostic analyzer comprises a reaction cup and a washing needle arranged at the opening of the reaction cup, wherein the washing needle reciprocates up and down and is drawn out or inserted into the reaction cup, a negative pressure forming block is sleeved on the washing needle, a needle sleeving hole is formed in the negative pressure forming block, the washing needle is fixedly connected in the needle sleeving hole, one end, far away from the washing needle, of the negative pressure forming block is provided with a plurality of through holes, the through holes are communicated with the needle sleeving hole, the through holes are formed in the corners of the negative pressure forming block, when the negative pressure forming block is inserted into the bottom of the reaction cup along with the washing needle, the outlet of each through hole is completely right opposite to and closely attached to the upper end of the reaction cup, and one end, far away from the bottom of the reaction cup, of the negative pressure forming block is close to the circumferential direction of the wall of the reaction cup to form a gap, an arc surface is arranged between any two adjacent side surfaces of the reaction cup and is in smooth transition through the arc surface.

Furthermore, a light-transmitting area is formed at the bottom of the reaction cup, a gap between the negative pressure forming block and the cup wall of the reaction cup is gradually enlarged from top to bottom, and a water pumping part is formed at one end, close to the light-transmitting area, of the negative pressure forming block.

Further, the negative pressure forming block shrinks into an inverted trapezoid shape along the direction of inserting the washing needle into the reaction cup.

Further, the distance between the water extraction part and the inner wall of the reaction cup is 0.5 mm-1 mm, and the aperture of the through hole is 0.2 mm-1.5 mm.

Furthermore, the through hole is of a horn-shaped open structure, and the diameter of one end close to the cup bottom of the reaction cup is larger than that of one end close to the trocar hole.

Further, the negative pressure forming block is manufactured by a 3D printing technology.

Furthermore, airflow holes distributed in an array mode are formed in the negative pressure forming block, and the size of one end, close to the flushing needle, of each airflow hole is larger than that of one end, close to the through hole, of each airflow hole.

Further, the airflow hole is located at a corner of the negative pressure forming block.

Further, the airflow hole is located on a side surface of the negative pressure forming block.

Further, the air flow hole is positioned in the negative pressure forming block.

The invention has the beneficial effects that:

according to the cleaning structure, the negative pressure forming block is arranged on the flushing needle, when the flushing needle moves towards the direction close to the bottom of the reaction cup, the negative pressure forming block is driven to move towards the bottom of the reaction cup, and the negative pressure forming block scrapes large liquid beads attached to the inner wall of the reaction cup towards the bottom of the reaction cup in the moving process due to the fact that the distance between the negative pressure forming block and the inner wall of the reaction cup is small. When the negative pressure forming block stays at the bottom of the reaction cup, the outlets of the through holes on the negative pressure forming block just completely cover the four sharp corners of the square reaction cup, and simultaneously, the gap between the negative pressure forming block and the cup wall of the reaction cup is reduced to the minimum, so that a negative pressure area is formed between the negative pressure forming block and the inner wall of the reaction cup. When the washing needle is used for pumping air outwards, the air in the negative pressure area is quickly collected into the through hole on the negative pressure forming block due to the instant air pressure difference, and the liquid in the negative pressure area and the liquid attached to the sharp corner of the bottom of the reaction cup are brought into the through hole by the high-speed flowing air, enter the needle sleeving hole and are sucked out through the washing needle. The structure can scrape off residual liquid drops on the inner wall of the reaction cup, the liquid suction position is just above the position with the maximum liquid drop adhesive force, so that liquid is conveniently pumped out, and the air flowing at high speed in the negative pressure zone and the arc surface on the reaction cup can further promote the liquid to converge towards the washing needle, so that the repeatability and the accuracy of the detection result of the in-vitro diagnosis analyzer can be further guaranteed.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of a cleaning structure of the present invention;

FIG. 2 is a schematic view of the structure of a reaction cup according to the present invention;

FIG. 3 is a schematic view of a part of the cleaning structure of the present invention;

FIG. 4 is a schematic view of the negative pressure forming block structure of the present invention;

FIG. 5 is a cross-sectional view of the negative pressure forming block of the present invention;

FIG. 6 is a partial structural cross-sectional view of the negative pressure forming block of the present invention;

fig. 7 is a schematic view of the negative pressure forming block structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

A cleaning structure of an in vitro diagnostic analyzer comprises a reaction cup 1 and a flushing needle 3 arranged at the opening of the reaction cup 1, wherein the flushing needle 3 reciprocates up and down and is drawn out or inserted into the reaction cup 1, as shown in figure 1, and a negative pressure forming block 2 is sleeved on the flushing needle 3.

A light-transmitting area 11 is formed at the bottom of the reaction cup 1, the gap between the negative pressure forming block 2 and the cup wall of the reaction cup 1 gradually increases from top to bottom, a water pumping part is formed at one end of the negative pressure forming block 2 close to the light-transmitting area 11, and as shown in fig. 3, the distance between the water pumping part and the inner wall of the reaction cup 1 is 1 mm.

An arc surface 12 is arranged between any two adjacent side surfaces of the reaction cup 1, and the arc surface 12 is in smooth transition, as shown in fig. 2, the arc surface 12 and the cup bottom of the reaction cup 1 form a corner.

In the negative pressure suction process, liquid smoothly transits from one side surface to the other side surface through the arc surface 12, so that the liquid is convenient to transfer, and the arc surface 12 has the function of guiding flow, so that residual liquid can be completely sucked.

The light-transmitting area 11 is not in contact with the arc surface 12.

The reaction cup 1 is made of plastic, and the reaction cup 1 is integrally formed through an injection molding process.

Set up pinhole 21 on the negative pressure formation piece 2, as shown in fig. 4, 5, wash needle 3 fixed connection in the pinhole 21, wash needle 3 with it has sealed glue to fill between the pinhole 21, negative pressure formation piece 2 is kept away from a plurality of through-holes 22 have been seted up to the one end of washing needle 3, through-hole 22 with pinhole 21 intercommunication, through-hole 22 sets up the corner of negative pressure formation piece 2, the aperture of through-hole 22 is 1.5 mm.

When the negative pressure forming block 2 is inserted into the bottom of the reaction cup 1 along with the flushing needle 3, the outlet of the through hole 22 is completely opposite and tightly attached to the upper end of the sharp corner of the reaction cup 1, liquid at the corner of the reaction cup 1 is efficiently removed, the influence of residual liquid on the next use of the reaction cup 1 is avoided, the detection preparation is favorably ensured, and the negative pressure forming block 2 is far away from one end of the bottom of the reaction cup 1 and is circumferentially drawn close to the wall of the reaction cup 1 to form a gap.

The negative pressure forming block 2 is manufactured by 3D printing technology.

The negative pressure forming block 2 shrinks along the direction that the washing needle 3 is inserted into the reaction cup 1 to form an inverted trapezoid, so that the influence on the light transmission of the light transmission area 11 caused by the contact of one end of the negative pressure forming block 2 close to the cup bottom of the reaction cup 1 and the inner wall of the reaction cup 1 in the up-and-down moving process of the negative pressure forming block 2 is effectively avoided.

Example two

The structure of the reaction cup is the same as that of the first embodiment, the difference is that the distance between the water pumping part and the inner wall of the reaction cup 1 is 0.8 mm, the aperture of the through hole 22 is 1 mm, and the through hole 22 is of a horn-shaped open structure, as shown in fig. 6, the diameter of one end close to the cup bottom of the reaction cup 1 is larger than that of one end close to the pinhole 21, so that the through hole 22 can more effectively suck out the liquid at the corner of the cup bottom of the reaction cup 1.

EXAMPLE III

The structure is the same as that of the first embodiment, except that the distance between the water extracting part and the inner wall of the reaction cup 1 is 0.6 mm, the aperture of the through hole 22 is 0.6 mm, and the negative pressure forming block 2 is provided with the airflow holes 23 distributed in an array, as shown in fig. 7, the airflow holes 23 are located at the corners of the negative pressure forming block 2, the airflow holes 23 are located at the outer wall of the negative pressure forming block 2, and the size of the end of the airflow holes 23 close to the washing needle 3 is larger than that of the end close to the through hole 22, so that the air flow speed near the corners of the cup bottom of the reaction cup 1 is higher under the condition that the negative pressures in the through holes 22 are the same, and the residual liquid is convenient to suck out.

Example four

The structure is the same as that of the third embodiment, except that the airflow hole 23 is provided in the negative pressure forming block 2 as a separate through-hole structure.

EXAMPLE five

The third embodiment is similar to the third embodiment, except that the distance between the water extraction unit and the inner wall of the reaction cup 1 is 0.5 mm, the diameter of the through hole 22 is 0.2 mm, and the air flow hole 23 is located on the side surface of the negative pressure forming block 2.

The working principle is as follows: the negative pressure forming block is arranged on the flushing needle, and when the flushing needle moves towards the direction close to the bottom of the reaction cup, the negative pressure forming block is driven to move towards the bottom of the reaction cup. When the negative pressure forming block stays at the bottom of the reaction cup, the outlets of the through holes on the negative pressure forming block just completely cover the four sharp corners of the square reaction cup, and simultaneously, the distance between the sealing part on the negative pressure forming block and the cup wall of the reaction cup is reduced to the minimum, so that a negative pressure area is formed between the negative pressure forming block and the inner wall of the reaction cup. When the washing needle is used for pumping air outwards, the air in the negative pressure area is quickly collected into the through hole on the negative pressure forming block due to the instant air pressure difference, and the liquid in the negative pressure area and the liquid attached to the sharp corner of the bottom of the reaction cup are brought into the through hole by the high-speed flowing air, enter the needle sleeving hole and are sucked out through the washing needle. The structure can scrape off residual liquid drops on the inner wall of the reaction cup, the liquid absorbing position is just above the position with the maximum liquid drop adhesive force, so that liquid is convenient to extract, and the air flowing at high speed in the negative pressure area can further promote the liquid to gather in the flushing needle, so that the repeatability and the accuracy of the detection result of the in-vitro diagnosis analyzer can be further guaranteed.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.