CN212121005U

CN212121005U - Liquid-transfering needle fixing device and washing subassembly

Info

Publication number: CN212121005U
Application number: CN202020403247.9U
Authority: CN
Inventors: 邹继华; 谢小恒; 吴旭锋; 杨学瑞
Original assignee: Ningbo Medical System Biotechnology Co Ltd
Current assignee: Ningbo Medical System Biotechnology Co Ltd
Priority date: 2020-03-26
Filing date: 2020-03-26
Publication date: 2020-12-11
Anticipated expiration: 2030-03-26

Abstract

The utility model relates to a medical treatment inspection instrument's technical field provides a pipetting needle fixing device, including pipetting needle and fixing base, be provided with the needle file on the fixing base, the pipetting needle is fixed on the needle file, is universal swivelling joint between needle file and the fixing base. The utility model discloses a pipetting needle fixing device can carry out universal rotation on the fixing base through the needle file to carry out the regulation of arbitrary angle to the pipetting needle, make the injection flow in along the pipe wall of reaction tube, avoid producing the impact to the liquid in the reaction tube, solve the difficult problem that liquid feeding produced the bubble in the trade. Will the utility model discloses a pipetting needle fixing device uses in the washing subassembly that washs the magnetic bead, makes the washing liquid pour into along the cup wall of reaction cup, can break up the magnetic bead that adsorbs on the pipe wall for it is more abundant to the washing of magnetic bead, and then improves test data's accuracy.

Description

Liquid-transfering needle fixing device and washing subassembly

Technical Field

The utility model relates to a medical treatment inspection instrument's technical field more exactly relates to a pipetting needle fixing device and washing subassembly.

Background

In a medical examination instrument for in vitro diagnosis, a test tube is generally adopted as a reaction tube, after sample reagent incubation in the reaction tube is completed, the reaction tube is transferred to a tube placing position of a washing component by a tube transferring arm, and then a washing process of absorbing waste liquid or adding a washing liquid is carried out by a liquid transferring needle. The liquid-transferring needle in most equipment in the market is fixed in the top of reaction tube at present, and can not the adjusting position, and when adding the washing liquid, the liquid-transferring needle probably all can assault the intraductal liquid of reaction and produce the bubble under the plunger pump effect to influence the precision that detects. And the washing subassembly of using the fixed scheme of present pipetting needle is then because can't carry out the regulation of arbitrary angle to the pipetting needle to can't break up the magnetic bead that adsorbs on the wall of cup, make the washing to the magnetic bead not enough.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a liquid-transfering needle fixing device, when making the liquid-transfering needle add the washing liquid in to the reaction tube, can not produce the impact to the liquid in the reaction tube to can not produce the bubble.

The technical solution of the utility model is that, a pipetting needle fixing device is provided, including pipetting needle and fixing base, be provided with the needle file on the fixing base, the pipetting needle is fixed on the needle file, is universal swivelling joint between needle file and the fixing base.

Compared with the prior art, the utility model discloses a pipetting needle fixing device can carry out universal rotation on the fixing base through the needle file to carry out the regulation of arbitrary angle to the pipetting needle, make the injection flow in along the pipe wall of reaction tube, avoid producing the impact to the liquid in the reaction tube, solve the difficult problem that the interior liquid feeding of trade produced the bubble.

Preferably, the fixing seat is provided with a needle seat limiting groove, and the needle seat limiting groove are installed in a matched mode. By adopting the structure, the needle seat is embedded into the fixed seat.

Preferably, the needle mount is spherical. By adopting the structure, the contact surface between the needle seat and the fixed seat is a spherical surface, thereby being convenient for realizing universal rotary connection.

Preferably, a passage for the liquid transferring needle to pass through is arranged in the fixing seat, and the needle seat limiting groove is arranged in the passage. By adopting the structure, the needle seat is limited in the fixed seat, and the liquid transferring needle can penetrate through the fixed seat to add liquid outwards.

Preferably, the needle seat is provided with a through hole, and the liquid transferring needle passes through the through hole in the needle seat and is fixed in the needle seat. By adopting the structure, the liquid transferring needle is conveniently fixed on the needle base.

Preferably, a locking piece is arranged between the fixed seat and the needle seat. By adopting the structure, after the needle-lowering base is adjusted to a specific angle, the needle base can be fixed on the fixing base by the locking piece, so that the angle of the needle base is prevented from changing.

Preferably, the locking piece comprises a positioning screw, a threaded hole communicated with the needle seat limiting groove is formed in the fixing seat, and the threaded hole is matched with the positioning screw. By adopting the structure, the positioning screw can be screwed into the threaded hole which is communicated with the needle seat limiting groove on the fixing seat, after the rotation angle of the needle seat is adjusted, the positioning screw is locked and the needle seat is fixed, and at the moment, the angle of the liquid transferring needle is also fixed.

Preferably, the lower bottom surface of the fixed seat is provided with a step surface, and the step surface corresponds to the position of the liquid outlet of the liquid-transferring needle. By adopting the structure, the position of the orifice of the reaction tube can be limited by the step surface, and the liquid transferring needle can be ensured to accurately inject the reagent into the reaction tube.

The to-be-solved technical problem of the utility model is to provide a washing subassembly, when wasing the magnetic bead in the reaction cup, the pipetting needle adds the washing liquid and can make the washing liquid pour into along the cup wall of reaction cup into in to the reaction cup, breaks up the magnetic bead that adsorbs on the pipe wall for it is more abundant to the washing of magnetic bead, and then improves test data's accuracy.

The technical solution of the utility model is, a washing subassembly is provided, including foretell pipetting needle fixing device and plunger pump, the input of pipetting needle be provided with be used for with the connecting bolt of the exit valve intercommunication of plunger pump, the exit valve of plunger pump with connect the airtight intercommunication of bolt.

Compared with the prior art, the utility model discloses a washing subassembly can carry out the regulation of arbitrary angle to the pipetting needle, and the washing liquid inhales via the inlet valve of plunger pump, and the outlet valve of following the plunger pump again gets into the pipetting needle and flows in along the cup wall of reaction cup, breaks away the magnetic bead that adsorbs on the cup wall for it is more abundant to the washing of magnetic bead, and then improves test data's accuracy, also can effectively avoid simultaneously impacting the liquid production in the reaction cup.

Drawings

Fig. 1 is a schematic structural diagram of a washing assembly according to the present invention.

Fig. 2 is a schematic sectional view of the fixing device of the pipetting needle of the present invention.

As shown in the figure: 1. the liquid transferring needle comprises a liquid transferring needle body 2, a fixing seat 2-1, a needle seat limiting groove 2-2, a step surface 2-3, a needle seat 2-4, a positioning screw 3, a reaction tube 4 and a connecting bolt.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Further, when a statement such as "… at least one" appears after the list of listed features, the entire listed feature is modified rather than modifying individual elements in the list.

As shown in fig. 1 and 2, the fixing device for a pipette needle of the present invention comprises a fixing base 2, a passage for the pipette needle 1 to pass through and absorb or add liquid into a reaction tube 3 is provided in the fixing base 2, a needle seat limiting groove 2-1 is provided on the upper portion of the passage, a step surface 2-2 for positioning the orifice of the reaction tube 3 is provided on the lower portion of the passage, a needle seat 2-3 is provided in the needle seat limiting groove 2-1, and a threaded hole communicated with the needle seat limiting groove 2-1 is further provided on the fixing base 2. The needle base 2-3 is spherical and is provided with a through hole, the liquid-transferring needle 1 passes through the through hole in the needle base 2-3 and is fixed in the needle base 2-3, and the spherical needle base 2-3 can rotate in the needle base limiting groove 2-1 at any angle, so that the liquid-transferring needle 1 is driven to perform direction adjustment at any angle. After the needle base 2-3 is rotated to adjust the liquid transferring needle 1 to a specific angle, the positioning screw 2-4 is screwed into the threaded hole on the fixed base 2 communicated with the needle base limiting groove 2-1, so that the positioning screw 2-4 locks and fixes the needle base 2-3, and the angle of the liquid transferring needle 1 is fixed at the moment.

As shown in figure 2, the input end of the pipetting needle 1 is further provided with a connecting bolt 4 for communicating with the outlet valve of the plunger pump, the outlet valve of the plunger pump is hermetically communicated with the connecting bolt 4 to form the washing component of the utility model, which is used for cleaning the magnetic beads in the reaction cup, and the cup mouth of the reaction cup is aligned or limited below the step surface 2-2 during liquid adding. The cleaning liquid reagent in the reagent pool is sucked in through the inlet valve of the plunger pump, then enters the pipetting needle 1 from the outlet valve of the plunger pump and flows in along the cup wall of the reaction cup, and magnetic beads adsorbed on the cup wall can be dispersed, so that the magnetic beads are more sufficiently cleaned, and meanwhile, the liquid in the reaction cup is prevented from being impacted.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention; the scope of the appended claims should be accorded the broadest interpretation so as to encompass all such modifications and equivalent arrangements as is within the spirit and scope of the present invention.

Claims

1. A fixing device for a pipetting needle is characterized by comprising the pipetting needle (1) and a fixing seat (2), wherein a needle seat (2-3) is arranged on the fixing seat (2), the pipetting needle (1) is installed on the needle seat (2-3), and the needle seat (2-3) is in universal rotary connection with the fixing seat (2).

2. The pipette needle fixing device according to claim 1, wherein the fixing base (2) is provided with a needle holder limiting groove (2-1), and the needle holder (2-3) is installed in cooperation with the needle holder limiting groove (2-1).

3. The pipette needle fixture of claim 2 wherein the needle mount (2-3) is spherical.

4. The pipette needle fixing device according to claim 2, wherein a passage through which the pipette needle (1) passes is provided in the fixing base (2), and the needle holder limiting groove (2-1) is provided in the passage.

5. The pipette needle holder according to claim 4, wherein the needle holder (2-3) is provided with a through hole, and the pipette needle (1) passes through the through hole in the needle holder (2-3) and is mounted in the needle holder (2-3).

6. The pipette needle holder according to claim 4, wherein a locking member is provided between the holder (2) and the needle holder (2-3).

7. The pipette needle fixing device according to claim 6, wherein the locking member comprises a set screw (2-4), the fixing base (2) is provided with a threaded hole communicated with the needle base limiting groove (2-1), and the threaded hole is matched with the set screw (2-4).

8. The pipette needle fixing device according to claim 1, wherein a step surface (2-2) is provided on the lower bottom surface of the fixing base (2), and the step surface (2-2) corresponds to the position of the liquid outlet of the pipette needle (1).

9. A washing assembly, characterized by comprising a plunger pump and a pipetting needle fixture device according to any of claims 1 to 8, the input end of the pipetting needle (1) being provided with a connection peg (4) for communication with the outlet valve of the plunger pump, which outlet valve of the plunger pump is in sealed communication with the connection peg (4).