CN214159664U - Pipette suction head - Google Patents
Pipette suction head Download PDFInfo
- Publication number
- CN214159664U CN214159664U CN202022074946.6U CN202022074946U CN214159664U CN 214159664 U CN214159664 U CN 214159664U CN 202022074946 U CN202022074946 U CN 202022074946U CN 214159664 U CN214159664 U CN 214159664U
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- elastic sealing
- sealing body
- pipette tip
- suction pipe
- liquid suction
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Abstract
The utility model discloses and provides a manufacturing is convenient, can improve and pipettor mouthpiece part between the leakproofness, ensures to move the successful pipettor suction head of liquid action. The pipette tip comprises an elastic sealing body (1) and a liquid suction pipe body (2) which are integrally formed by injection molding of double materials, wherein the elastic sealing body (1) is wrapped by the liquid suction pipe body (2), and the elastic sealing body (1) can be matched with a pipette nozzle part. The utility model discloses but wide application in biological assay field.
Description
Technical Field
The utility model relates to a pipettor suction head.
Background
Pipettes are the most common pipetting equipment in experiments, almost every biological laboratory worker uses the pipettes every day, and the consumable material matched with the pipettes is a plastic sucker. The principle of the liquid transfer device is a piston movement, when a suction head is assembled on the liquid transfer device, the piston in the liquid transfer device sucks a section of air, and the suction head can simultaneously suck a section of liquid with the same volume. The whole process requires that the liquid transfer device and the suction head are closed, the inner wall of the suction head is completely attached to the outer wall of the nozzle part of the liquid transfer device, and the tightness of a communication space is guaranteed. Typically, the pipette tip is injection molded from polypropylene plastic, and the pipette tip features are machined from metal or injection molded from plastic.
The fit degree between the pipette nozzle part and the suction head is the key for the smooth operation of the whole system. In the actual use process, the sealing performance between the pipette nozzle part and the plastic sucker is damaged mainly by two conditions: wear of the nozzle parts during long-term use of the pipettor; the mould is not accurate enough in the manufacturing process of plastic suction head, causes the size deviation of plastic suction head inner wall. In addition, the specifications of the nozzle parts of pipettors of different brands in a laboratory have different tolerance sizes, so that the pipette tips cannot be matched to cause air leakage and the pipetting experiment fails, thereby influencing the correctness or accuracy of the experiment result, and the defects exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art not enough, provide a production make convenient, general match nature high, can improve and pipettor mouthpiece part between the leakproofness, ensure to move the successful pipettor suction head of liquid action.
The utility model adopts the technical proposal that: the utility model discloses a two material injection moulding integrated into one piece's elastic sealing body and imbibition body, imbibition body parcel is lived the elastic sealing body, the elastic sealing body can with pipettor mouthpiece part looks adaptation.
At least one annular protruding part is arranged in the elastic sealing body, and the distance between the annular protruding part and the top surface of the elastic sealing body is 3-5 mm.
And a filter is arranged in the liquid suction pipe body and below the elastic sealing body.
The elastic sealing body is formed by injection molding of a thermoplastic elastomer material, and the liquid suction pipe body is formed by injection molding of a polypropylene resin material.
The elastic sealing body is an annular body with a hollow inner part and is in a conical shape with a wide upper part and a narrow lower part; the thickness of the elastic sealing body is 0.3-0.4 MM, and the height is 12-15 MM.
The upper end of the liquid suction pipe body wraps the elastic sealing body, and the lower end of the liquid suction pipe body is in a conical shape with a wide upper part and a narrow lower part.
And the bottom of the liquid suction pipe body is provided with a liquid suction hole.
The pipette tip is firstly subjected to injection molding processing through a double-material mold and then subjected to injection molding processing on the elastic sealing body.
The utility model has the advantages that: because the utility model discloses a two material injection moulding integrated into one piece's elastic sealing body and imbibition body, imbibition body parcel is lived the elastic sealing body, the elastic sealing body can with pipettor mouthpiece part looks adaptation, adopt the direct integrated processing of current two material forming techniques elastic sealing body and imbibition body, production is simple and convenient, need not to fill the sealing washer after the additional machining recess again, and adopts elastic sealing body, then can more easily with the laminating of pipettor mouthpiece part, can the adaptation different, so the utility model discloses the manufacturing is convenient, logical join in marriage nature high, can improve and pipettor mouthpiece part between the leakproofness, ensure to move the liquid action successfully.
Drawings
Fig. 1 is a sectional view of the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
As shown in fig. 1, pipettor suction head include that extra quality moulds plastics integrated into one piece's elastic sealing body 1 and imbibition body 2, pipettor suction head is earlier through extra quality mould injection moulding process behind the imbibition body 2 injection moulding process again elastic sealing body 1, imbibition body 2 wraps up elastic sealing body 1, elastic sealing body 1 can with pipettor mouthpiece part looks adaptation, imbibition hole 5 is left to the bottom of imbibition body 2, through the contact of this kind of flexibility, makes elastic sealing body 1 with the outer wall of mouthpiece part is closely laminated, when the piston in pipettor control chamber absorbs liquid, the isovolumic liquid is inhaled simultaneously to imbibition body 2, and after the imbibition was accomplished, the pipettor also can be more convenient push away pipettor suction head.
As the preferred scheme, be provided with one at least annular bellying 3 in the elastic sealing body, be provided with twice in this embodiment annular bellying 3, annular bellying 3 distance the top surface 3 ~ 5mm of elastic sealing body, first annular bellying 3 distance the top surface 3mm of elastic sealing body, the second annular bellying 3 distance the top surface 5mm of elastic sealing body.
Preferably, in order to prevent impurities in the pipette tip from being sprayed into the liquid to be measured when the pipette works, a filter 4 may be disposed inside the liquid suction pipe body 2 and below the elastic sealing body 1.
In addition, the elastic sealing body 1 has the excellent performances of high elasticity, aging resistance and oil resistance of the traditional cross-linked vulcanized rubber, meanwhile, the thermoplastic elastomer has the characteristics of convenient processing and wide processing mode of common plastics, can adopt thermoplastic elastomers (TPE) of processing modes such as injection molding, extrusion, blow molding and the like, has various types, adopts thermoplastic polyurethane elastomer rubber (TPU) with excellent characteristics of high tension, high tensile force, toughness and aging resistance, the liquid suction pipe body 2 is made of common thermoplastic resin, ABS plastic or PC plastic, etc., in this embodiment, polypropylene resin (PP) which is relatively widely used in the field of suction heads and is heavy in thermoplastic resin is used, and the plastic belongs to colorless translucent thermoplastic light general-purpose plastic, and has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high-wear-resistance processing properties.
In order to match the nozzle part and facilitate the insertion of a liquid suction gun, the elastic sealing body 1 is an annular body with a hollow inner part and is in a conical shape with a wide upper part and a narrow lower part; the thickness of the elastic sealing body 1 is 0.3-0.4 MM, the height is 12-15 MM, meanwhile, the upper end of the liquid suction pipe body 2 wraps the elastic sealing body 1, and the lower end of the liquid suction pipe body is in a conical shape with the upper part being wide and the lower part being narrow. In order to ensure that the pipettor can normally push out the pipette tip, the top surface of the elastic sealing body 1 is flush with the top surface of the pipette body 2.
Variations and modifications to the above-described embodiments may become apparent to those skilled in the art from the disclosure and teachings of the above description. Therefore, the present invention is not limited to the above-mentioned embodiments, and any obvious modifications, replacements or variations made by those skilled in the art on the basis of the present invention belong to the protection scope of the present invention.
Claims (8)
1. A pipette tip, characterized by: the pipette tip comprises an elastic sealing body (1) and a liquid suction pipe body (2) which are integrally formed by injection molding of double materials, wherein the elastic sealing body (1) is wrapped by the liquid suction pipe body (2), and the elastic sealing body (1) can be matched with a pipette nozzle part.
2. A pipette tip according to claim 1, wherein: the elastic sealing body is internally provided with at least one annular protruding part (3), and the distance between the annular protruding part (3) and the top surface of the elastic sealing body is 3-5 mm.
3. A pipette tip according to claim 1, wherein: and a filter (4) is arranged in the liquid suction pipe body (2) and below the elastic sealing body (1).
4. A pipette tip according to any of claims 1 to 3, characterized in that: the elastic sealing body (1) is formed by injection molding of a thermoplastic elastomer material, and the liquid suction pipe body is formed by injection molding of a polypropylene resin material.
5. A pipette tip according to any of claims 1 to 3, characterized in that: the elastic sealing body (1) is an annular body with a hollow inner part and is in a conical shape with a wide upper part and a narrow lower part; the thickness of the elastic sealing body (1) is 0.3-0.4 MM, and the height is 12-15 MM.
6. A pipette tip according to any of claims 1 to 3, characterized in that: the upper end of the liquid suction pipe body (2) wraps the elastic sealing body (1), and the lower end of the liquid suction pipe body is in a conical shape with a wide upper part and a narrow lower part.
7. A pipette tip according to any of claims 1 to 3, characterized in that: and the bottom of the liquid suction pipe body (2) is provided with a liquid suction hole (5).
8. A pipette tip according to any of claims 1 to 3, characterized in that: the pipette tip is firstly subjected to injection molding processing of the pipette body (2) through a double-material mold and then subjected to injection molding processing of the elastic sealing body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022074946.6U CN214159664U (en) | 2020-09-21 | 2020-09-21 | Pipette suction head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022074946.6U CN214159664U (en) | 2020-09-21 | 2020-09-21 | Pipette suction head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214159664U true CN214159664U (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022074946.6U Active CN214159664U (en) | 2020-09-21 | 2020-09-21 | Pipette suction head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214159664U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749225A (en) * | 2022-05-18 | 2022-07-15 | 霍尔斯特德(苏州)医疗科技有限公司 | Novel disposable suction head capable of preventing liquid from being stained |
-
2020
- 2020-09-21 CN CN202022074946.6U patent/CN214159664U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114749225A (en) * | 2022-05-18 | 2022-07-15 | 霍尔斯特德(苏州)医疗科技有限公司 | Novel disposable suction head capable of preventing liquid from being stained |
| CN114749225B (en) * | 2022-05-18 | 2024-01-30 | 霍尔斯特德(苏州)医疗科技有限公司 | Novel disposable suction head for preventing liquid from being stained |
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