CN218486004U

CN218486004U - Liquid transfer device

Info

Publication number: CN218486004U
Application number: CN202222838607.XU
Authority: CN
Inventors: 蔡金凤
Original assignee: Chuanyue Biotechnology Co ltd
Current assignee: Chuanyue Biotechnology Co ltd
Priority date: 2022-10-26
Filing date: 2022-10-26
Publication date: 2023-02-17
Anticipated expiration: 2032-10-26

Abstract

The utility model relates to the technical field of liquid transferring tools, in particular to a liquid transferring device; the pipette can be automatically disassembled without the contact of the hands of operators and the pipette, so that the mutual pollution risk of liquid samples is reduced; the suction component is arranged on the pipette shell, the outer mounting head is arranged at the bottom of the pipette shell, the outer mounting head is communicated with the interior of the pipette shell, the inner mounting head can be arranged in the outer mounting head in a vertically sliding mode, and a connecting transmission component is arranged between the suction component and the inner mounting head; the connecting and driving assembly comprises a connecting rod and a limiting block, the air suction assembly is connected with the limiting block through the connecting rod, an air cavity which is communicated up and down is arranged in the inner mounting head, the limiting block can be mounted in the air cavity in a vertical sliding mode, and a through hole with the aperture smaller than the outer diameter of the limiting block is formed in the inner mounting head.

Description

Liquid transfer device

Technical Field

The utility model relates to a move the technical field of liquid instrument, especially relate to a pipettor.

Background

As is known, a pipette, also known as a pipette gun, is a device for quantitatively transferring liquids. In conducting analytical testing studies, small or minute amounts of liquid are typically removed using a pipette. Pipettes can be divided into gas piston pipettes and external piston pipettes according to the principle; the gas piston type pipettor is mainly used for standard pipetting, and the external piston type pipettor is mainly used for treating special liquids such as volatile liquid, easy corrosion and viscous liquid; the publication (announcement) number CN208390051U discloses a quantitative and recyclable liquid transfer device, which comprises a liquid transfer device body and a liquid transfer device shell, wherein the liquid transfer device body is sleeved inside the liquid transfer device shell, the top and the bottom of the liquid transfer device body are respectively provided with a first through hole and a second through hole, and the second through hole Kong Waitao is connected with a suction nozzle; the liquid transfer pressing rod on the liquid transfer device can move up and down through the groove and the opening formed in the shell of the liquid transfer device and the limiting block arranged in the groove, and the locating clamping pin can limit and quantify a quantitative baffle of the liquid transfer device, so that the liquid transfer device can be quantitatively recycled when in use; the improved structure is improved on the basis of the original index finger hook, so that fingers on a palm holding the pipettor can be perfectly attached to the pipettor shell, a worker can conveniently hold the pipettor to carry out pipetting operation, and the operation when the pipettor is used is more convenient; when the liquid transferring device is used, the liquid transferring device is arranged at the position of the liquid transferring device, the liquid transferring device extends into a liquid to be transferred, liquid is sucked into the liquid transferring tube through the liquid transferring device, the liquid transferring device is pushed, and the liquid in the liquid transferring tube is dripped into a required vessel under the action of pressure; while the next liquid sample pipetting is performed; the pipette needs to be replaced, the pipette is manually turned, and the pipette is only required to be detached from the pipette; in the use discovery, demolish the change in-process carrying out the pipette, operating personnel hand and pipette outer wall contact, and the pipette has already adhered sample liquid, easily causes the pollution to the operating personnel hand, in next pipette installation, causes cross contamination, especially when moving liquid operation to liquid samples such as virus, has great potential safety hazard, influences the detection precision of liquid sample, and the pipette dismantlement mode remains further to be improved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Not enough to prior art, the utility model provides a do not need operating personnel hand and pipette to contact, can realize the automatic dismantlement of pipette, reduce the pipettor of the mutual pollution risk of liquid sample.

(II) technical scheme

In order to achieve the above purpose, the utility model provides a following technical scheme: the suction component is arranged on the pipette shell, the outer mounting head is arranged at the bottom of the pipette shell, the outer mounting head is communicated with the interior of the pipette shell, the inner mounting head can be arranged in the outer mounting head in a vertically sliding mode, and a connecting transmission component is arranged between the suction component and the inner mounting head; the connecting and driving assembly comprises a connecting rod and a limiting block, the air suction assembly is connected with the limiting block through the connecting rod, an air cavity which is communicated up and down is arranged in the inner mounting head, the limiting block can be mounted in the air cavity in a vertical sliding mode, and a through hole with the aperture smaller than the outer diameter of the limiting block is formed in the inner mounting head.

Preferably, the air suction assembly comprises a piston and a pull rod, the piston is mounted in the pipette shell in a vertically sliding mode, and the pull rod is connected with the piston.

Preferably, the pull rod is a threaded rod, and the pull rod is screwed on the pipettor shell; the upper part of the pull rod is in threaded connection with the upper part of the pipettor shell; the bottom of the pull rod is rotationally connected with the piston.

Preferably, the mounting device also comprises an elastic connecting piece, and the inner mounting head is elastically connected with the inner top wall of the outer mounting head through the elastic connecting piece.

Preferably, a bent hook portion is arranged on one side of the upper portion of the pipette shell, and a protruding portion is arranged on the side, opposite to the top of the bent hook portion, of the pipette shell.

Preferably, a knob is fixedly mounted at the top of the pull rod; the outer wall of the knob is provided with anti-slip lines which are uniformly distributed in the circumferential direction.

Preferably, the outer wall of the liquid transfer device shell is provided with a volume scale mark, and the liquid transfer device shell is a transparent body.

Preferably, the outer mounting head is screwed to the bottom of the pipette housing.

(III) advantageous effects

Compared with the prior art, the utility model provides a pipettor possesses following beneficial effect: this pipettor, install the pipette in interior installation head bottom, inside the pipettor casing, the liquid sample is inhaled to in the pipette, the rethread subassembly of breathing in extrudes the interior liquid sample of pipette, when the pipette is changed to needs carrying out, the subassembly of breathing in moves up on the whole, pull rod pulling stopper shifts up in step, after the stopper contacts with interior installation head, interior installation head shifts up by the synchronous pulling, it gets into to the outer installation head in to go up the head up until interior installation head, the pipette contacts bottom the outer installation head this moment, the pipette breaks away from interior installation head department under the limiting action of outer installation head, accomplish the automatic dismantlement of pipette, do not need operating personnel hand and pipette to contact, can realize the automatic dismantlement of pipette, reduce the liquid sample mutual contamination risk.

Drawings

Fig. 1 is a schematic isometric view of the present invention;

fig. 2 is a schematic top view of the present invention;

fig. 3 isbase:Sub>A schematic cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2 according to the present invention;

in the drawings, the reference numbers: 1. a pipettor housing; 2. an outer mounting head; 3. an inner mounting head; 4. a connecting rod; 5. a limiting block; 6. an air cavity; 7. a through hole; 8. a piston; 9. a pull rod; 10. a hook portion; 11. a boss portion; 12. a knob; 13. capacity scale lines; 14. an elastic connecting piece.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

Referring to fig. 1-3, a pipette of the present invention includes a pipette housing 1, a suction component mounted on the pipette housing 1, an external mounting head 2 and an internal mounting head 3, the external mounting head 2 is mounted at the bottom of the pipette housing 1, the external mounting head 2 is communicated with the inside of the pipette housing 1, the internal mounting head 3 is mounted in the external mounting head 2 in a vertically slidable manner, and a connection transmission component is mounted between the suction component and the internal mounting head 3; the connecting transmission component comprises a connecting rod 4 and a limiting block 5, the air suction component is connected with the limiting block 5 through the connecting rod 4, an air cavity 6 which is communicated up and down is arranged in the inner mounting head 3, the limiting block 5 can be mounted in the air cavity 6 in a vertically sliding manner, and a through hole 7 with the aperture smaller than the outer diameter of the limiting block 5 is arranged on the inner mounting head 3; the stopper 5 is preferred cylindrical block, and through-hole 7 is the annular ring, and the annular ring aperture is less than the cylindrical block external diameter, and connecting rod 4 diameter is less than the annular ring aperture, when admitting the air to pass through from through-hole 7, avoids stopper 5 to break away from through-hole 7 to the realization is to the effect of upwards pulling of installing head 3.

Specifically, the air suction assembly comprises a piston 8 and a pull rod 9, the piston 8 is mounted in the pipettor shell 1 in a vertically sliding manner, and the pull rod 9 is connected with the piston 8; reciprocate through control pull rod 9 to realize the reciprocating of piston 8, during the liquid removal, piston 8 moves up, produces the negative pressure in the pipettor casing 1, makes in the liquid sample gets into the pipettor, and during the dropping liquid, piston 8 moves down, and 1 internal pressure increase of pipettor casing, the inside liquid of pipette is extruded, with the realization to the suction of liquid sample and extrude.

Specifically, the pull rod 9 is a threaded rod, and the pull rod 9 is screwed on the pipettor housing 1; the upper part of the pull rod 9 is in threaded connection with the upper part of the pipettor shell 1; the bottom of the pull rod 9 is rotationally connected with the piston 8; through rotating pull rod 9, realize the vertical movement control to piston 8 to the amount of movement of control piston 8 that can be more accurate carries out effective control to the liquid sample's the volume of transfering liquid, prevents effectively that pull rod 9 from excessively moving up or moving down and causing the too much or the too big condition of dropping liquid volume of transfering liquid to take place, improves and moves liquid volume precision.

Specifically, the mounting device also comprises an elastic connecting piece 14, and the inner mounting head 3 is elastically connected with the inner top wall of the outer mounting head 2 through the elastic connecting piece 14; the elastic connecting piece 14 is preferably a spring, when the inner mounting head 3 moves upwards, the spring is compressed and is in a contraction state, and after the pipette is detached from the inner mounting head 3, the inner mounting head 3 automatically resets under the action of the spring, so that the manual intervention is not needed, the contact frequency of an operator and the inner mounting head 3 is effectively reduced, and the risk of pollution of the inner mounting head 3 is reduced; in another embodiment, the elastic connecting member 14 may also be a disc spring, a spring plate, or other equivalent elastic connecting member 14 with elastic restoring effect.

Specifically, a bent hook part 10 is arranged on one side of the upper part of the pipette shell 1, and a convex part 11 is arranged on the pipette shell 1 and on the opposite side of the top of the bent hook part 10; during the operation, user's middle finger contacts with crotch portion 10, and user's hand tiger mouth department contacts with bellying 11 to hold the pipettor casing 1 tightly, wrench movement pull rod 9 through forefinger and thumb cooperation, control piston 8 reciprocate, improved the convenience of gripping and stability of pipettor casing 1, the operating personnel of being convenient for simultaneously moves liquid the operation.

Specifically, a knob 12 is fixedly arranged at the top of the pull rod 9; the outer wall of the knob 12 is provided with anti-skid lines which are uniformly distributed in the circumferential direction; the rotary driving of the pull rod 9 can be realized by the knob 12 in a more labor-saving manner, the friction force between the knob 12 and the hand of an operator can be improved under the action of the anti-skid lines, and the rotary driving of the knob 12 can be realized more conveniently in a labor-saving manner.

Specifically, the outer wall of the pipettor shell 1 is provided with a volume scale line 13, and the pipettor shell 1 is a transparent body; the pipette shell 1 can be made of transparent glass or transparent plastic, so that an operator can observe the moving amount of the piston 8 in the pipette shell 1, and the moving liquid amount of the pipette is read through the volume scale lines 13.

Specifically, the external mounting head 2 is screwed at the bottom of the pipettor shell 1; the outer mounting head 2 is detachably connected with the pipettor shell 1 through threads, so that the inner mounting head 3 is conveniently mounted in the production process, and the assembly convenience is improved; and the outer mounting head 2 can be conveniently detached, and the subsequent maintenance and overhaul of the inner mounting head 3 and the elastic connecting piece 14 are facilitated.

When the liquid transfer device is used, the liquid transfer device is arranged at the bottom of the inner mounting head 3, the middle finger of a user is in contact with the bent hook part 10, the mouth of the hand of the user is in contact with the boss part 11, the liquid transfer device shell 1 is gripped, the knob 12 is twisted by matching the index finger and the thumb, the pull rod 9 moves upwards relative to the liquid transfer device shell 1 after the screw transmission of the pull rod 9, the piston 8 moves upwards, negative pressure is generated in the liquid transfer device, and the liquid transfer device extending into a liquid sample absorbs part of the liquid sample; the knob 12 is turned reversely, the pull rod 9 drives the piston 8 to move downwards, the internal pressure of the liquid transfer machine shell 1 is increased, the liquid sample is extruded from the inside of the liquid transfer machine, and the liquid transfer operation of the liquid sample is completed; then according to the principle, the piston 8 is enabled to continuously move upwards, the pull rod 9 pulls the limiting block 5 to move upwards, after the limiting block 5 is contacted with the inner mounting head 3, the inner mounting head 3 is synchronously pulled to move upwards until the inner mounting head 3 enters the outer mounting head 2, at the moment, the pipette is contacted with the bottom of the outer mounting head 2, the pipette is separated from the inner mounting head 3 under the limiting action of the outer mounting head 2, and the automatic disassembly of the pipette is completed.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

It should be readily understood that "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest manner such that "on … …" means not only "directly on something", but also "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning of "above" or "above" something, but also the meaning of "above" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Furthermore, spatially relative terms, such as "under," "below," "beneath," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's illustrated relationship to another element or feature. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A pipette is characterized by comprising a pipette shell (1), a suction component arranged on the pipette shell (1), an outer mounting head (2) and an inner mounting head (3), wherein the outer mounting head (2) is arranged at the bottom of the pipette shell (1), the outer mounting head (2) is communicated with the interior of the pipette shell (1), the inner mounting head (3) can be arranged in the outer mounting head (2) in a vertically sliding manner, and a connecting transmission component is arranged between the suction component and the inner mounting head (3);

the connecting transmission component comprises a connecting rod (4) and a limiting block (5), the air suction component is connected with the limiting block (5) through the connecting rod (4), an air cavity (6) which is communicated up and down is arranged in the inner mounting head (3), the limiting block (5) can be mounted in the air cavity (6) in a vertical sliding mode, and a through hole (7) with the diameter smaller than the outer diameter of the limiting block (5) is formed in the inner mounting head (3).

2. The pipette according to claim 1, wherein the suction assembly comprises a piston (8) and a pull rod (9), the piston (8) is slidably mounted in the pipette housing (1) up and down, and the pull rod (9) is connected with the piston (8).

3. The pipette according to claim 2, characterized in that the pull rod (9) is a threaded rod, the pull rod (9) being screwed onto the pipette housing (1).

4. The pipette according to claim 3, further comprising a flexible connection member (14), wherein the inner mounting head (3) is elastically connected with an inner top wall of the outer mounting head (2) through the flexible connection member (14).

5. The pipette according to claim 4, wherein a bent hook portion (10) is provided on one side of the upper portion of the pipette housing (1), and a protrusion portion (11) is provided on the pipette housing (1) on the top-opposite side of the bent hook portion (10).

6. The pipette according to claim 5, wherein a knob (12) is fixedly mounted on the top of the pull rod (9).

7. The pipette according to claim 6, wherein the outer wall of the pipette housing (1) is provided with volume graduation marks (13), and the pipette housing (1) is transparent.

8. The pipette according to claim 7, wherein the external mounting head (2) is screwed to the bottom of the pipette housing (1).