CN219072984U

CN219072984U - Suction head removing device of pipettor

Info

Publication number: CN219072984U
Application number: CN202223528875.8U
Authority: CN
Inventors: 吴巍; 张国家; 丁晓明; 廖彩祥; 华志强; 荆磊; 颜亮
Original assignee: Orient Immunoassay Suzhou Medical Technology Co ltd
Current assignee: Orient Immunoassay Suzhou Medical Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-26
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a suction head removing device of a liquid dispenser, which comprises a plunger pump assembly and a suction head adapter, wherein the plunger pump assembly comprises a main pump body, a plunger unit and a driving assembly for driving the plunger unit to move relative to the main pump body; the suction head removing device comprises a sleeve body which is sleeved on the outer side of the suction head adapter in a sliding manner and a pushing unit which is connected with the sleeve body, and the pushing unit can be pushed by the driving assembly to move; when the pipettor performs the pumping and spitting operation, the driving assembly moves outside the movement range of the pushing unit; when it is desired to remove the suction head, the drive assembly is brought into the range of motion of the pushing unit. According to the utility model, the automatic suction head removing can be realized by means of the driving component for driving the plunger unit to move, a driving element is not required to be additionally arranged, the cost can be saved, and the whole structure of the liquid dispenser is compact.

Description

Suction head removing device of pipettor

Technical Field

The utility model relates to the technical field of pipettors, in particular to a suction head removing device of a pipettor.

Background

A pipette, also called a pipette, is a metering tool that removes liquid from an original container into another container over a range of ranges. Pipettes are widely used in biological, chemical and other fields. During operation of the pipette, the pipette needs to be provided with a suction head to suck liquid, and after pipetting is completed, the suction head needs to be detached to prevent different reagents from polluting each other, in the prior art, the pipette needs to be removed by an external auxiliary device for disassembling the suction head, or some pipettes are provided with a suction head removing device, but the suction head removing device has a complex structure, and a power element needs to be additionally arranged, so that the cost is high and the volume of the pipette can be obviously increased.

Disclosure of Invention

The utility model aims to: in order to overcome the defects in the prior art, the utility model provides a pipette tip removing device for a pipette, which is low in implementation cost and keeps the volume of the pipette small.

The technical scheme is as follows: in order to achieve the above object, a pipette device of the present utility model includes a plunger pump assembly and a pipette tip adapter, the plunger pump assembly including a main pump body, a plunger unit, and a driving assembly driving the plunger unit to move relative to the main pump body; the suction head removing device comprises a sleeve body which is sleeved on the outer side of the suction head adapter in a sliding manner and a pushing unit which is connected with the sleeve body, and the pushing unit can be pushed by the driving assembly to move; when the pipettor performs the pumping and spitting operation, the driving assembly moves outside the movement range of the pushing unit; when it is desired to remove the suction head, the drive assembly is brought into the range of motion of the pushing unit.

Further, the pushing unit and the sleeve body are respectively arranged at two sides of the main pump body; the main pump body is provided with a through hole which is communicated with the main pump body, the main pump body is provided with a transmission rod which is in sliding fit with the through hole, and the transmission rod is connected with the sleeve body and the pushing unit.

Further, the sleeve body is provided with a flange part and a tubular part, the flange part is close to the main pump body and is connected with the transmission rod, and the end part of the tubular part is used for acting on the suction head; the pushing unit is disc-shaped, and a plurality of transmission rods are connected between the pushing unit and the flange part. By adopting the structure, on one hand, the transmission rods are staggered with the plunger units, and on the other hand, the thrust transmitted by the transmission rods enables the sleeve body to be stressed more uniformly, so that the sleeve body can slide smoothly relative to the plunger units.

Further, the pushing unit is provided with an induction piece, and the suction head removing device further comprises a sensor; the sensing tab causes the sensor to generate a sensing signal when the tip is properly mounted on the tip adapter.

Further, the tip adaptor has a tapered portion at an end thereof with at least one turn of an external enlargement. In actual use, when the lower end of the suction head adapter is not connected with the suction head, the sleeve body, the transmission rod and the pushing unit are all in a low position under the action of gravity; when the suction head is installed at the lower end of the suction head adapter, the upper end of the suction head is expanded and deformed by the increasing part, so that the suction head is firmly connected with the suction head adapter, the suction head enables the sleeve body, the transmission rod and the pushing unit to be in a high position, the pushing unit can move downwards only by the driving component acting on the pushing unit, and even if the sleeve body moves downwards, the suction head is gradually pushed away from the suction head adapter by the end part of the sleeve body, and finally the suction head falls off, so that the automatic suction head removal is realized.

The beneficial effects are that: according to the suction head removing device of the liquid dispenser, through the arrangement of the sleeve body and the pushing unit, and the driving assembly is enabled to execute different tasks in different movement ranges, automatic suction head removing can be achieved by means of the driving assembly driving the plunger unit to move, no driving element is needed to be additionally arranged, cost can be saved, and the whole structure of the liquid dispenser is small.

Drawings

FIG. 1 is a schematic view of a pipette tip removing device;

FIG. 2 is a view showing a state in which the pipette tip is mounted on the pipette;

FIG. 3 is a view showing a state of the suction head removing apparatus when the suction head is removed.

In the figure: 1-a plunger pump assembly; 11-a main pump body; 12-a plunger unit; 13-a drive assembly; 2-tip adapter; 21-a taper; 21 a-an enlarged portion; 31-sleeve body; 31 a-a flange portion; 31 b-a tubular portion; 32-pushing unit; 321-sensing piece; 33-a transmission rod; 34-sensor.

Detailed Description

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

The pipette tip removing device of the pipette as shown in fig. 1, the pipette comprises a plunger pump assembly 1 and a tip adapter 2, the plunger pump assembly 1 comprises a main pump body 11, a plunger unit 12 and a driving assembly 13 for driving the plunger unit 12 to move relative to the main pump body 11; the suction head removing device comprises a sleeve body 31 which is sleeved on the outer side of the suction head adapter 2 in a sliding way and a pushing unit 32 which is connected with the sleeve body 31, and the pushing unit 32 can be pushed to move by the driving component 13; as shown in fig. 2, when the pipette performs pumping and spitting operations, the driving unit 13 moves outside the movement range s of the pushing unit 32; as shown in fig. 3, when the pipette head is required to be removed, the driving component 13 enters the movement range s of the pushing unit 32, so that the pipette head can be automatically removed by means of the driving component 13, no driving component is required to be additionally arranged, the cost can be saved, and the whole structure of the pipette can be small.

Preferably, the pushing unit 32 and the sleeve 31 are disposed on both sides of the main pump body 11; the main pump body 11 is provided with a through hole 11a penetrating the main pump body, the main pump body 11 is provided with a transmission rod 33 in sliding fit with the through hole 11a, and the transmission rod 33 is connected with the sleeve body 31 and the pushing unit 32.

Preferably, the sleeve 31 has a flange portion 31a and a tubular portion 31b, the flange portion 31a being adjacent to the main pump 11 and connected to the transmission rod 33, the end of the tubular portion 31b being intended to act on the suction head; the pushing unit 32 is disc-shaped, and a plurality of transmission rods 33 are connected between the pushing unit 32 and the flange portion 31 a. In the illustrated embodiment, the number of drive links 33 is two. By adopting the structure, on one hand, the transmission rods 33 are staggered with the plunger unit 12, and on the other hand, the thrust transmitted by the transmission rods 33 enables the sleeve 31 to be stressed more uniformly, so that the sleeve 31 can slide smoothly relative to the plunger unit 12.

Preferably, the pushing unit 32 has an induction piece 321 thereon, and the suction head removing device further includes a sensor 34; the sensing tab 321 causes the sensor 34 to generate a sensing signal when the tip adapter 2 is properly fitted with a tip.

Preferably, the tip adaptor 2 has a tapered portion 21 at its end, the tapered portion 21 having at least one external enlargement 21a. In actual use, when the lower end of the suction head adapter 2 is not connected with the suction head, the sleeve 31, the transmission rod 33 and the pushing unit 32 are all in a low position under the action of gravity; when the suction head is mounted at the lower end of the suction head adapter 2, the enlarged portion 21a expands and deforms the upper end of the suction head, so that the suction head is firmly connected with the suction head adapter 2, the suction head enables the sleeve 31, the transmission rod 33 and the pushing unit 32 to be in a high position, and the sensor 34 generates a sensing signal by the sensing piece 321, so that whether the suction head is correctly mounted at the end of the suction head adapter 2 can be judged according to whether the sensor 34 generates the sensing signal. The driving component 13 acts on the pushing unit 32 to enable the pushing unit 32 to move downwards, namely, even if the sleeve body 31 moves downwards, the end part of the sleeve body 31 gradually pushes the suction head away from the suction head adapter 2, and finally, the suction head is enabled to fall off, so that automatic suction head removal is realized.

The foregoing is only a preferred embodiment of the utility model, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the utility model.

Claims

1. A pipette head removing device of a pipette, the pipette comprises a plunger pump assembly (1) and a pipette head adapter (2), the plunger pump assembly (1) comprises a main pump body (11), a plunger unit (12) and a driving assembly (13) for driving the plunger unit (12) to move relative to the main pump body (11); the suction head removing device is characterized by comprising a sleeve body (31) which is sleeved on the outer side of the suction head adapter (2) in a sliding manner and a pushing unit (32) which is connected with the sleeve body (31), wherein the pushing unit (32) can be pushed by the driving assembly (13) to move; when the pipette performs pumping and spitting operations, the driving assembly (13) moves outside the movement range of the pushing unit (32); when the suction head needs to be removed, the driving assembly (13) enters the movement range of the pushing unit (32).

2. The pipette tip removing device according to claim 1, wherein the pushing unit (32) and the sheath body (31) are disposed separately on both sides of the main pump body (11); the main pump body (11) is provided with a through hole (11 a) which penetrates through the main pump body, the main pump body (11) is provided with a transmission rod (33) which is in sliding fit with the through hole (11 a), and the transmission rod (33) is connected with the sleeve body (31) and the pushing unit (32).

3. The pipette tip removing device as recited in claim 2, wherein said sheath body (31) has a flange portion (31 a) and a tubular portion (31 b), said flange portion (31 a) being adjacent to said main pump body (11) and connected to said transmission rod (33), an end portion of said tubular portion (31 b) being for acting on a pipette tip; the pushing unit (32) is disc-shaped, and a plurality of transmission rods (33) are connected between the pushing unit (32) and the flange part (31 a).

4. The pipette tip removing device of claim 1, wherein the pushing unit (32) is provided with an induction piece (321), and the pipette tip removing device further comprises a sensor (34); the sensing tab (321) causes the sensor (34) to generate a sensing signal when the tip is properly mounted on the tip adapter (2).

5. The pipette tip device according to claim 1, characterized in that the tip of the tip adapter (2) has a conical section (21), the conical section (21) having at least one turn of external enlargement (21 a).