CN211436245U - Anti-pumpback pipette head - Google Patents
Anti-pumpback pipette head Download PDFInfo
- Publication number
- CN211436245U CN211436245U CN201921607152.2U CN201921607152U CN211436245U CN 211436245 U CN211436245 U CN 211436245U CN 201921607152 U CN201921607152 U CN 201921607152U CN 211436245 U CN211436245 U CN 211436245U
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- liquid suction
- liquid
- side wall
- sealing ring
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Abstract
The utility model discloses a prevent pumpback liquid-transfering gun head, including the rifle head body, its characterized in that: the novel pipette tip is characterized in that the pipette tip body comprises a detachable connecting section and a liquid suction section, a protruding buffering portion is arranged on the lower portion of the connecting section, an annular bottom plate is arranged in the buffering portion, an annular groove is formed by enclosing the bottom plate and the lower side wall of the buffering portion, an elastic sealing ring is arranged in the groove, the outer side wall of the liquid suction section is hermetically connected with the inner side wall of the sealing ring, a liquid suction port is formed in the lower end of the liquid suction section, a guide section is arranged on the upper portion of the liquid suction section, and the guide section is curved upwards and gradually shrinks towards the center of the pipette. The utility model discloses simple structure, convenient to use thereby can prevent through design buffering portion that liquid pumpback from to the liquid-transfering gun in, and then prevent liquid pollution.
Description
Technical Field
The utility model relates to an experimental device technical field, concretely relates to prevent pumpback liquid-transfering gun head.
Background
The existing pipette is one of pipettors, is commonly used for transferring a small amount of liquid or trace liquid in a laboratory, different sizes of pipette heads are matched with pipette guns of different specifications, the shapes of common manufacturers are slightly different, but the working principle and the operation method of the pipette guns are basically consistent, and the existing pipette heads have the defect that in the process of pipetting and pushing out, if a push handle is pressed to release too fast, a pipettor is sucked backwards into the pipettor, so that the pipettor is polluted, the pipettor is polluted next time, and further experimental data are inaccurate.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve above-mentioned problem, provide one kind and can prevent that liquid from pumpback to preventing among pipettor or the pipette.
The utility model adopts the following technical scheme:
the utility model provides an prevent liquid-transfering gun head of pumpback, includes the rifle head body, the rifle head body is including dismantling interface section and the imbibition section of connection, the interface section lower part is equipped with the buffering portion of an evagination, be equipped with an annular bottom plate in the buffering portion, the bottom plate encloses with the lower part lateral wall of buffering portion and closes formation annular groove, be equipped with the elasticity sealing washer in the recess, the lateral wall and the inside wall sealing connection of sealing washer of imbibition section, imbibition section lower extreme is equipped with the imbibition mouth, and imbibition section upper portion is equipped with the guide section, the guide section is the arc and bends upward and to the shrink gradually rifle head body center.
As a preferred technical scheme of the utility model, the internal diameter of sealing washer is greater than the external diameter of imbibition section, and elasticity through the sealing washer when imbibition section is connected with the sealing washer is closely sealed with imbibition section outside wall card.
As a preferred technical scheme of the utility model, imbibition section lateral wall is equipped with the external screw thread, the sealing washer inside wall is equipped with the internal thread, and the imbibition section passes through thread sealing connection with the sealing washer.
As a preferred technical scheme of the utility model, buffer portion is spherical buffer portion.
As an optimized technical scheme of the utility model, the opening diameter on direction section top is less than the internal diameter on interface section upper portion.
The utility model has the advantages that:
the utility model discloses simple structure, convenient to use thereby can prevent through design buffering portion that liquid pumpback from to the liquid-transfering gun in, and then prevent liquid pollution.
Drawings
FIG. 1 is a schematic structural view of the present invention;
the symbols in the drawings illustrate that:
1: interface section, 2: liquid suction section, 3: buffer, 4: a bottom plate, 5: seal ring, 6: liquid suction port, 7: a guide section.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a liquid-suction prevention pipette tip comprises a tip body, the tip body comprises a connector section 1 and a liquid-suction section 2 which are detachably connected, a convex spherical buffer part 3 is arranged at the lower part of the connector section 1, the buffer part 3 can also be designed into an oval shape, an annular bottom plate 4 is arranged in the buffer part 3, an annular groove is formed by enclosing the bottom plate 4 and the lower side wall of the buffer part 3, an elastic sealing ring 5 is arranged in the groove, the inner diameter of the sealing ring 5 is slightly larger than the outer diameter of the liquid-suction section 2, so that the sealing ring 5 is in interference connection with the liquid-suction section 2 when being connected, the inner ring diameter of the bottom plate 4 and the opening diameter at the bottom end of the buffer part 3 are both equal to the outer diameter of the liquid-suction section 2, when the liquid-suction section 2 is connected with the sealing ring 5, the outer side wall of the liquid-suction section 2 continuously pushes the sealing ring 5 to the outside until being inserted to, the liquid suction section and the liquid suction section are connected in a sealing mode, a liquid suction port 6 is formed in the lower end of the liquid suction section 2, a guide section 7 is arranged on the upper portion of the liquid suction section 2, the guide section 7 is arc-shaped and bends upwards and gradually shrinks towards the center of the gun head body, and the opening diameter of the top end of the guide section 7 is smaller than the inner diameter of the upper portion of the interface section 1.
The connected mode of interface section 1 and imbibition section 2 also can adopt threaded connection mode, promptly 2 lateral walls in imbibition section set up the external screw thread, set up the internal thread with external screw thread matched with at 5 inside walls in sealing washer to be in the same place imbibition section 2 and sealing washer 5 through thread sealing connection.
According to the working principle of the utility model, the interface section 1 is provided with the buffer part 3 during liquid suction, so that the liquid is sucked beyond the maximum limit to provide a buffer, the liquid is prevented from entering the liquid transferring gun, and the liquid pollution during next liquid transferring is avoided; the design of the guide section 7 can prevent liquid from flowing backwards along the inner wall of the interface section 1, namely when the liquid slides downwards along the inner wall of the interface section 1, liquid drops naturally fall onto the outer side wall of the guide section 7 when arriving at the joint of the top end of the buffer part 3 and the interface section 1, and then fall into the buffer part 3 along the outer side wall of the guide section 7, so that the liquid is prevented from flowing backwards; in addition, design into the interface section 1 and the imbibition section 2 that can dismantle the connection with rifle head body, can satisfy the supporting use of the liquid-transfering gun of different specifications, the interface section 1 of the top end opening diameter of the removable different specifications of same imbibition section 2 promptly uses with the liquid-transfering gun of different specification interfaces is supporting, improves the utilization ratio of rifle head body, subtracts the province consumptive material.
Finally, it should be noted that: these embodiments are merely illustrative of the present invention and do not limit the scope of the invention. In addition, other variations and modifications will be apparent to persons skilled in the art based on the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications may be made without departing from the scope of the present invention.
Claims (5)
1. The utility model provides an anti-pumpback pipette head, includes rifle head body, its characterized in that: the pipette head comprises a detachable connection section (1) and a liquid suction section (2), wherein the lower portion of the connection section (1) is provided with a convex buffering portion (3), an annular bottom plate (4) is arranged in the buffering portion (3), the bottom plate (4) and the lower side wall of the buffering portion (3) are enclosed to form an annular groove, an elastic sealing ring (5) is arranged in the groove, the outer side wall of the liquid suction section (2) is connected with the inner side wall of the sealing ring (5) in a sealing mode, a liquid suction port (6) is arranged at the lower end of the liquid suction section (2), a guide section (7) is arranged on the upper portion of the liquid suction section (2), and the guide section (7) is arc-shaped and gradually shrinks towards the center of the pipette head body.
2. An anti-withdrawal pipette tip as defined in claim 1, wherein: the internal diameter of sealing washer (5) is greater than the external diameter of imbibition section (2), and imbibition section (2) is connected with sealing washer (5) when closely seals imbibition section (2) outside wall card through the elasticity of sealing washer (5).
3. An anti-withdrawal pipette tip as defined in claim 1, wherein: the outer side wall of the liquid suction section (2) is provided with an external thread, the inner side wall of the sealing ring (5) is provided with an internal thread, and the liquid suction section (2) is connected with the sealing ring (5) in a sealing manner through a thread.
4. An anti-withdrawal pipette tip as claimed in any one of claims 1 to 3, wherein: the buffer part (3) is a spherical buffer part.
5. An anti-withdrawal pipette tip as claimed in any one of claims 1 to 3, wherein: the diameter of the opening at the top end of the guide section (7) is smaller than the inner diameter of the upper part of the interface section (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921607152.2U CN211436245U (en) | 2019-09-25 | 2019-09-25 | Anti-pumpback pipette head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921607152.2U CN211436245U (en) | 2019-09-25 | 2019-09-25 | Anti-pumpback pipette head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211436245U true CN211436245U (en) | 2020-09-08 |
Family
ID=72309620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921607152.2U Active CN211436245U (en) | 2019-09-25 | 2019-09-25 | Anti-pumpback pipette head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211436245U (en) |
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2019
- 2019-09-25 CN CN201921607152.2U patent/CN211436245U/en active Active
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