CN219356282U

CN219356282U - Liquid transfer device

Info

Publication number: CN219356282U
Application number: CN202320094860.0U
Authority: CN
Inventors: 蒋诗怡; 张若菲
Original assignee: Sichuan University
Current assignee: Sichuan University
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-07-18
Anticipated expiration: 2033-02-01

Abstract

The utility model relates to the technical field of basic experimental equipment, and discloses a liquid dispenser, which comprises a liquid dispenser body, wherein one side of the liquid dispenser body is provided with a shell, one side of the liquid dispenser body is provided with a register, the lower end of the liquid dispenser body is communicated with an outer layer suction rod, and the inner wall of the outer layer suction rod is connected with a middle layer suction rod in a sliding manner; through the cooperation between first spring, second spring, outer sucker rod, the mechanical fixation has adopted the replacement sucker of user's application of force installation to press the sucker rod and stagnate at first stop point and second stop point to accomplish the installation and the dismantlement to the replacement sucker, and the removable sucker causes the fastening of four sets of gag levers of accessible after certain wearing and tearing at the suction nozzle, avoided the replacement sucker to drop, thereby improve the life of pipettor, and the accurate structure of pipettor is intact, still can realize accurate volume, cause the equipment extravagant.

Description

Liquid transfer device

Technical Field

The utility model relates to the technical field of basic experimental equipment, in particular to a liquid dispenser.

Background

The pipette gun is one of pipettors, is commonly used for transferring small or trace amounts of liquid in a laboratory, and needs to be repeatedly applied in a large number in the experimental processes of biology, medicine, chemistry and the like, pipette tips of conventional pipettors are used in the current experiment, different specifications of pipette tips are matched with different sizes of pipette tips, the shapes produced by different manufacturers are slightly different, and when the gun tips need to be replaced, the gun tips are difficult to prepare, so that a user needs to prepare the pipette tips of various specifications;

along with the pipette gradually going into experimental study and experimental teaching of various universities, the pipette has a great effect on the reagent transferring surface, compared with the traditional pipette, the pipette has greatly solved errors caused by manual misoperation, the suction nozzle on the inner suction rod can be worn by the suction nozzle mounting and pushing-out modes of the traditional pipette, the suction nozzle cannot be tightly connected with the suction nozzle, and the experiment reagent is wasted and the system is polluted due to the falling of the suction nozzle, so that the pipette is required to be provided.

Disclosure of Invention

The utility model aims to provide a liquid dispenser, which changes a traditional double-layer suction rod into a three-layer suction rod, reduces the abrasion of a suction nozzle caused by excessive force applied by a user during suction nozzle installation, simultaneously avoids the suction nozzle from falling off after the suction nozzle is worn to a certain extent, and prolongs the service life of the liquid dispenser so as to solve the problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a pipettor, includes the pipettor body, one side of pipettor body is provided with the shell, and one side of pipettor body installs the register, the lower extreme intercommunication of pipettor body has outer suction bar, and the inner wall sliding connection of outer suction bar has the middle level suction bar, the inner chamber of pipettor body divide into liquid chamber and bottom chamber through the baffle, and the lower surface of baffle is provided with the inlayer suction bar;

the upper end of the shell is inserted with a suction head push rod, the lower end of the suction head push rod is provided with two groups of guide holes, the bottom of the inner cavity of the shell is welded with two groups of guide rods, the outer walls of the two groups of guide rods are respectively sleeved with a first spring and a second spring, the two groups of guide rods are respectively inserted with the two groups of guide holes, and the side wall of the upper end of the middle layer suction rod is fixedly connected with the side wall of the lower end of the suction head push rod;

four groups of limit rods are integrally formed at the lower end of the middle-layer suction rod, protruding blocks are arranged on the inner sides of the lower ends of the four groups of limit rods, and the four groups of limit rods are arranged at equal angles.

Preferably, the upper end of the liquid transfer device body is inserted with a button, the lower end of the button is integrally formed with an adjusting knob, the lower end of the button is fixedly connected with a piston, the outer diameter of the piston is the same as the inner diameter of the liquid taking cavity, and the liquid taking cavity is communicated with the inner layer suction rod.

Preferably, two groups of mounting grooves are formed in the side wall of the inner cavity of the shell, a third spring and balls are arranged in the two groups of mounting grooves, and two ends of the third spring are respectively abutted to the bottoms of the mounting grooves and the balls.

Preferably, one group of the mounting grooves and the upper end of the second spring are arranged on the same plane, the distance between the other group of the mounting grooves and the bottom of the inner cavity of the shell is half of the length of the second spring, and the sucker push rod and the outer layer sucker rod are arranged in a Z shape.

Preferably, the side wall integrated into one piece of pipettor body upper end has anti-skidding dactylotheca, the lower extreme intercommunication of inlayer suction bar has the suction nozzle, and the lower extreme of inlayer suction bar has the replaceable suction head through the suction nozzle intercommunication, the outer wall integrated into one piece of replaceable suction head upper end has the snap ring, and the upper end lateral wall of replaceable suction head passes through the lower extreme joint of snap ring and four sets of gag lever post inner walls.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the first spring, the second spring, the outer sucking rod and the sucker push rod are matched, mechanical fixation is adopted to replace the force application of a user to install the replaceable sucker, the sucker push rod is pressed to be stopped at the first stopping point and the second stopping point, so that the replaceable sucker is installed and detached, the replaceable sucker can be fastened through four groups of limiting rods after the sucker is worn out to a certain extent, the replaceable sucker is prevented from falling, the service life of the liquid dispenser is prolonged, the precise structure of the liquid dispenser is intact, precise measurement can be realized, and the waste of equipment is caused.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic cross-sectional view of a pipette body according to the present utility model;

FIG. 3 is a schematic cross-sectional view of the housing of the present utility model;

FIG. 4 is a schematic view of a stop lever according to the present utility model;

FIG. 5 is an enlarged schematic view of the structure of FIG. 2A;

FIG. 6 is an enlarged schematic view of the structure of FIG. 2B;

FIG. 7 is a schematic view of the structure of the present utility model when the replaceable tip is replaced.

In the figure: 1. a pipette body; 2. an outer layer suction rod; 3. a housing; 4. a suction head push rod; 41. a guide hole; 5. an anti-slip fingerstall; 6. a button; 7. a register; 8. a replaceable suction head; 81. a clasp; 9. a piston; 10. a liquid taking cavity; 11. a bottom cavity; 12. a guide rod; 13. a first spring; 14. a second spring; 15. a middle layer suction rod; 151. a limit rod; 152. a bump; 16. an inner layer suction rod; 17. a suction nozzle; 18. a third spring; 19. a ball; 20. and a mounting groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-7, the present utility model provides a technical solution: the utility model provides a pipettor, includes pipettor body 1, and the one side of pipettor body 1 installs indicator 7, and one side of pipettor body 1 is provided with shell 3, and the lower extreme of pipettor body 1 communicates has outer suction bar 2, and the inner wall sliding connection of outer suction bar 2 has middle layer suction bar 15, and the inner chamber of pipettor body 1 divide into liquid chamber 10 and bottom chamber 11 through the baffle, and the lower surface of baffle is provided with inlayer suction bar 16;

the upper end of the shell 3 is inserted with a suction head push rod 4, the lower end of the suction head push rod 4 is provided with two groups of guide holes 41, the bottom of the inner cavity of the shell 3 is welded with two groups of guide rods 12, the outer walls of the two groups of guide rods 12 are respectively sleeved with a first spring 13 and a second spring 14, the two groups of guide rods 12 are inserted with the two groups of guide holes 41 respectively, and the side wall of the upper end of a middle layer suction rod 15 is fixedly connected with the side wall of the lower end of the suction head push rod 4;

four groups of limiting rods 151 are integrally formed at the lower end of the middle-layer suction rod 15, protruding blocks 152 are arranged on the inner sides of the lower ends of the four groups of limiting rods 151, and the four groups of limiting rods 151 are arranged at equal angles.

When the novel suction head is used, the suction head push rod 4 is pressed to a first stop point, the first stop point is a ball 19 on the same plane with the second spring 14, meanwhile, the lower end of the suction head push rod 4 compresses the first spring 13, the second spring 14 is not compressed, the middle layer suction rod 15 and the suction head push rod 4 move downwards synchronously, so that four groups of limit rods 151 extend out, the replaceable suction head 8 and the inner layer suction rod 16 are connected through the suction nozzle 17, after the suction head push rod 4 is loosened, the suction head push rod 4 is reset under the elastic potential energy of the first spring 13, so that the middle layer suction rod 15 is contracted between the outer layer suction rod 2 and the inner layer suction rod 16, the four groups of limit rods 151 fasten the replaceable suction head 8 under the limit of the outer layer suction rod 2, the replaceable suction head 8 and the suction nozzle 17 are tightly connected, experimental reagent leakage can be prevented, when the replaceable suction head 8 is replaced, the second stop point is positioned at the other ball 19, the balls 19 are in a bump, so that the lower end of the middle layer suction rod 15 is in contact with the replaceable suction head 8, so that the replaceable suction head 8 is pushed, the service life of the replaceable suction head 8 is prolonged, and the service life of the novel suction head is prolonged;

the liquid taking range of the liquid shifter can be adjusted through the adjusting knob at the lower end of the button 6, the adjusted range is observed through the register 7, the first stop point is the set range, the second stop point is the maximum absorption range, the maximum absorption metering of the reagent solvent absorbed through the replaceable suction head 8 is not more than the volume of the replaceable suction head 8, the reagent capacity can not enter the liquid taking cavity 10, and all reagent solution can be pumped out by pressing the reagent solution to the second stop point when liquid is pumped out.

The upper end of pipettor body 1 is pegged graft and is had button 6, and the lower extreme integrated into one piece of button has adjust knob, the lower extreme fixedly connected with piston 9 of button 6, and the external diameter of piston 9 is the same with the internal diameter of getting liquid chamber 10, get liquid chamber 10 and inlayer sucker 16 and be linked together, adjust piston 9 position through pressing button 6, make liquid get into interchangeable suction head 8, thereby realize the removal of experimental reagent, and inlayer sucker 16 and outer sucker 2 are fixed knot constructs, the removal of middle level sucker 15 of being convenient for, stable in structure has improved the life of pipettor body 1.

Two sets of mounting grooves 20 have been seted up to the lateral wall of shell 3 inner chamber, and all install third spring 18 and ball 19 in two sets of mounting grooves 20, and the both ends of third spring 18 are inconsistent with the bottom and the ball 19 of mounting groove 20 respectively, set for first stop and second stop through the ball 19 in two sets of mounting grooves 20, and the staff of being convenient for feels suction head push rod 4 and moves down the position to be convenient for operate pipettor body 1, the dismouting to interchangeable suction head 8 is convenient.

Wherein a set of mounting groove 20 sets up at the coplanar with the upper end of second spring 14, and a set of mounting groove 20 is half of second spring 14 length apart from the interval of shell 3 inner chamber bottom in addition, and suction head push rod 4 is the Z shape setting with outer suction rod 2, and the length of first spring 13 is the twice of second spring 14 length, and when installing interchangeable suction head 8, contradicts first spring 13, and the lower extreme of suction head push rod 4 is contradicted with first spring 13 and second spring 14 when dismantling interchangeable suction head 8, adopts the double spring setting, has improved the dismouting efficiency of interchangeable suction head 8.

The lateral wall integrated into one piece of pipettor body 1 upper end has anti-skidding dactylotheca 5, the lower extreme intercommunication of inlayer suction bar 16 has suction nozzle 17, and the lower extreme of inlayer suction bar 16 has interchangeable suction head 8 through suction nozzle 17 intercommunication, the outer wall integrated into one piece of interchangeable suction head upper end has the snap ring, and the upper end lateral wall of interchangeable suction head 8 passes through the lower extreme joint of snap ring 81 and four sets of gag lever post 151 inner walls, the stability of handheld pipettor body 1 is convenient for through anti-skidding dactylotheca 5, four sets of gag lever posts 151 are spacing to the upper end outer wall of interchangeable suction head 8 simultaneously, thereby improve the stability when dismantling the suction head installation, prevent that interchangeable suction head 8 from dropping, thereby the life of pipettor body 1 is prolonged.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pipette comprising a pipette body (1), characterized in that: one side of the liquid transfer device body (1) is provided with a shell (3), one side of the liquid transfer device body (1) is provided with a register (7), the lower end of the liquid transfer device body (1) is communicated with an outer layer suction rod (2), the inner wall of the outer layer suction rod (2) is slidably connected with a middle layer suction rod (15), the inner cavity of the liquid transfer device body (1) is divided into a liquid taking cavity (10) and a bottom cavity (11) through a partition plate, and the lower surface of the partition plate is provided with an inner layer suction rod (16);

the upper end of the shell (3) is inserted with a suction head push rod (4), the lower end of the suction head push rod (4) is provided with two groups of guide holes (41), the bottom of the inner cavity of the shell (3) is welded with two groups of guide rods (12), the outer walls of the two groups of guide rods (12) are respectively sleeved with a first spring (13) and a second spring (14), the two groups of guide rods (12) are respectively inserted with the two groups of guide holes (41), and the side wall of the upper end of the middle-layer suction rod (15) is fixedly connected with the side wall of the lower end of the suction head push rod (4);

four groups of limiting rods (151) are integrally formed at the lower end of the middle-layer suction rod (15), protruding blocks (152) are arranged on the inner sides of the lower ends of the four groups of limiting rods (151), and the four groups of limiting rods (151) are arranged at equal angles.

2. A pipette as defined in claim 1 wherein: the upper end of pipettor body (1) is pegged graft and is had button (6), and the lower extreme integrated into one piece of button (6) has adjust knob, the lower extreme fixedly connected with piston (9) of button (6), and the external diameter of piston (9) is the same with the internal diameter of getting liquid chamber (10), get liquid chamber (10) and inlayer suction bar (16) are linked together.

3. A pipette as defined in claim 1 wherein: two sets of mounting grooves (20) are formed in the side wall of the inner cavity of the shell (3), a third spring (18) and balls (19) are arranged in the two sets of mounting grooves (20), and two ends of the third spring (18) are respectively abutted to the bottoms of the mounting grooves (20) and the balls (19).

4. A pipette in accordance with claim 3 wherein: one group of the mounting grooves (20) and the upper end of the second spring (14) are arranged on the same plane, the distance between the other group of the mounting grooves (20) and the bottom of the inner cavity of the shell (3) is half of the length of the second spring (14), and the sucker push rod (4) and the outer layer sucker rod (2) are arranged in a Z shape.

5. A pipette as defined in claim 1 wherein: the side wall integrated into one piece of pipettor body (1) upper end has anti-skidding dactylotheca (5), the lower extreme intercommunication of inlayer suction bar (16) has suction nozzle (17), and the lower extreme of inlayer suction bar (16) has interchangeable suction head (8) through suction nozzle (17) intercommunication, the outer wall integrated into one piece of interchangeable suction head (8) upper end has snap ring (81), and the lower extreme joint of the upper end lateral wall of interchangeable suction head (8) through snap ring (81) and four sets of gag lever post (151) inner walls.