CN220328691U

CN220328691U - Quantitative pipette

Info

Publication number: CN220328691U
Application number: CN202321426550.0U
Authority: CN
Inventors: 汪华元
Original assignee: Zhejiang Zhongzhen Biomedical Technology Co ltd
Current assignee: Zhejiang Zhongzhen Biomedical Technology Co ltd
Priority date: 2023-06-06
Filing date: 2023-06-06
Publication date: 2024-01-12
Anticipated expiration: 2033-06-06

Abstract

The utility model discloses a quantitative pipette which comprises a pipette body, a liquid collecting pipe and a barrel body, wherein the liquid collecting pipe is arranged at the outer side of the top end of the pipette body, the barrel body is arranged at the top end of the liquid collecting pipe, a suction nozzle is arranged in the bottom end of the barrel body, an anti-slip structure is arranged at the outer side of the barrel body, a pressing handle is arranged at the top end of a connecting rod, the limiting structure comprises a sleeve shell, a graduated scale, a knob, a screw rod, a moving block, a moving plate and a limiting plate, the sleeve shell is fixed on one side of the barrel body, and the graduated scale is fixed on one side of the sleeve shell. According to the device, the knob is pulled to move the position of the limiting plate, the position of the moving block and the position of the limiting plate are fixed by rotating the knob, so that the limiting plate limits the movement of the moving plate, and the amount of liquid extracted by the piston is limited, so that the movement limiting function of the device is realized, the movement of the piston is conveniently limited, the movement of the piston is accurate, and the accuracy of the device is improved.

Description

Quantitative pipette

Technical Field

The utility model relates to the technical field of quantitative pipettes, in particular to a quantitative pipette.

Background

The quantitative pipette is a special experimental device for measuring the volume of liquid and sucking and transferring the liquid into other containers, is commonly used for sampling and adding liquid in biological experiments or chemical laboratory, is convenient to operate, is accurate to use and is widely used;

chinese patent grant publication No. CN 214863667U, publication day 2021, 11 month and 26 days, discloses a quantitative pipette, including lower quantitative tube and last pipette, lower quantitative tube upper end seals grafting in last pipette lower extreme, and lower quantitative tube top is sealed and its middle overflow pipe that is equipped with, overflow pipe intercommunication lower quantitative tube and last pipette and overflow pipe's volume count are in the total volume of lower quantitative tube, be equipped with the collecting tank in the last pipette lower extreme, the overflow pipe inserts from the centre of collecting tank and flushes with the inner wall top of collecting tank, goes up the pipette upper portion and is equipped with the breather pipe, is equipped with the air vent on the last pipette lateral wall that corresponds the breather pipe, be equipped with the air lock in the breather pipe, it is equipped with the suction bag to go up the pipette top. The utility model has simple structure and convenient use, and can enter the liquid collecting tank from the overflow pipe after being sucked into the excessive liquid, and is trapped in the upper liquid suction pipe, so that the inconvenience of the liquid suction volume in the lower quantitative pipe is always ensured, the accuracy of liquid suction is improved, the difficulty of liquid suction is also reduced, and the liquid suction efficiency is improved;

the prior technical proposal has the following defects: when the device is used, the defect of larger pipetting error is overcome, the prior device generally utilizes the spring to control the movement of the piston to pump liquid into the liquid collecting pipe, and after the pipetting operation is completed, the spring can still push the piston to move in the cylinder, so that the liquid pumped by the device is easy to have errors, and the accuracy of the device is affected.

Disclosure of Invention

First, the technical problem to be solved

The object of the present utility model is to provide a quantitative pipette which solves the problems set forth in the background art mentioned above.

(II) summary of the utility model

In order to solve the technical problems, the utility model provides the following technical scheme: the utility model provides a quantitative pipette, includes straw, liquid collecting pipe and barrel, the liquid collecting pipe is installed in the outside on straw top, the barrel is installed on the top of liquid collecting pipe, and the inside of barrel bottom has seted up the suction nozzle, the outside of barrel is provided with anti-skidding structure, one side of barrel is provided with limit structure, the inside of barrel is fixed with the spring, and the top of spring is provided with the piston, the top of piston is fixed with the connecting rod, press the handle is installed on the top of connecting rod, limit structure includes sleeve shell, scale, knob, screw rod, movable block, movable plate and limiting plate, the one side at the barrel is fixed to the sleeve shell, one side of sleeve is fixed with the scale.

By means of the quantitative pipette, the piston is pushed to move downwards through the connecting rod by pressing the pressing handle, air in the cylinder is discharged, meanwhile, the piston is extruded and compressed by the spring to stretch out and draw back, the limiting structure is adjusted to limit the movement of the piston, the piston is pushed to move upwards by loosening the pressing handle by inserting the pipette into the liquid, the pipette is enabled to suck the liquid into the liquid collecting pipe, and pipetting is conducted.

Preferably, a moving block is arranged in the casing, a screw is inserted into one side of the moving block, a knob is fixed on one side of the screw, a limit plate is fixed on one side of the moving block, and the moving plate is fixed on the outer side of the connecting rod. The knob is pulled to move the position of the limiting plate, and the knob is rotated to fix the positions of the moving block and the limiting plate, so that the limiting plate limits the movement of the moving plate, and the amount of liquid extracted by the piston is limited.

Preferably, an external thread is arranged on the outer side wall of the screw rod, and an internal thread matched with the external thread is arranged inside the moving block.

Preferably, a sliding structure is formed between the moving block and the casing, and the limiting plate extends to the inside of the casing to be connected with the moving block.

Preferably, the anti-slip structure comprises an adhesive layer, a rubber shell, anti-slip particles and a baffle, wherein the adhesive layer is arranged on the outer side of the cylinder, and the rubber shell is arranged on the outer side of the adhesive layer. The rubber shell is fixed in position through the adhesive layer, meanwhile, the friction force between the device and the hand is increased through the anti-slip particles and the rubber shell, and the device is not easy to slide downwards through the baffle plate.

Preferably, the anti-slip particles are fixed with a plurality of groups on the outer side of the rubber shell, and the anti-slip particles of the plurality of groups are distributed on the outer side of the rubber shell at equal intervals.

(III) beneficial effects

Compared with the prior art, the utility model has the beneficial effects that: this ration pipette is rational in infrastructure, has following advantage:

(1) The position of the limiting plate is moved by pulling the knob, and the position of the moving block and the position of the limiting plate are fixed by rotating the knob, so that the limiting plate limits the movement of the moving plate, and the amount of liquid extracted by the piston is limited, thereby realizing the movement limiting function of the device, being convenient for limiting the movement of the piston, ensuring the movement accuracy of the piston and improving the accuracy of the device;

(2) The rubber shell is fixed through the adhesive layer, meanwhile, the friction force between the device and the hand is increased through the anti-slip particles and the rubber shell, and the device is not easy to slide down through the baffle, so that the device is convenient to increase the friction force between the device and the hand, and the device is stable to hold and is not easy to slide.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional elevation view of the present utility model;

FIG. 2 is a schematic side view of the present utility model;

FIG. 3 is an enlarged partial cross-sectional view of the structure of FIG. 1A according to the present utility model;

fig. 4 is a schematic side view of the antiskid structure of the present utility model.

Reference numerals in the drawings illustrate: 1. a suction pipe; 2. a liquid collection tube; 3. a cylinder; 4. an anti-slip structure; 401. an adhesive layer; 402. a rubber shell; 403. anti-slip particles; 404. a baffle; 5. a connecting rod; 6. a pressing handle; 7. a limit structure; 701. a casing; 702. a graduated scale; 703. a knob; 704. a screw; 705. a moving block; 706. a moving plate; 707. a limiting plate; 8. a piston; 9. a spring; 10. and (5) a suction nozzle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by one of ordinary skill in the art without inventive faculty, are intended to be within the scope of the present utility model, based on the embodiments of the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1-4, the quantitative pipette provided by the utility model comprises a pipette 1, a liquid collecting tube 2 and a barrel 3, wherein the liquid collecting tube 2 is arranged on the outer side of the top end of the pipette 1, the barrel 3 is arranged on the top end of the liquid collecting tube 2, a suction nozzle 10 is arranged in the bottom end of the barrel 3, an anti-slip structure 4 is arranged on the outer side of the barrel 3, a limit structure 7 is arranged on one side of the barrel 3, a spring 9 is fixed in the interior of the barrel 3, a piston 8 is arranged on the top end of the spring 9, a connecting rod 5 is fixed on the top end of the piston 8, a pressing handle 6 is arranged on the top end of the connecting rod 5, the limit structure 7 comprises a casing 701, a graduated scale 702, a knob 703, a screw 704, a moving block 705, a moving plate 706 and a limit plate 707, the casing 701 is fixed on one side of the casing 701, the moving block 705 is internally provided with the moving block 705, one side of the screw 704 is internally inserted with the knob 703, one side of the moving block 705 is fixed on the outer side of the connecting rod 5, an external thread is arranged on the outer side of the screw 704, the moving block 705 is provided with the internal thread of the moving block 705, and the internal thread is matched with the internal thread of the moving block 707, and the internal thread is matched with the internal thread of the moving block 705, and the internal thread is extended to form a limit structure.

The quantitative pipette based on the embodiment is as follows: the piston 8 is pushed to move downwards through the connecting rod 5 by pressing the pressing handle 6, air in the cylinder 3 is discharged, meanwhile, the piston 8 extrudes the spring 9 to stretch under force, the movement of the piston 8 is limited by the limiting structure 7 is regulated, the compressed spring 9 pushes the piston 8 to move upwards by inserting the suction pipe 1 into the liquid, the suction pipe 1 pumps the liquid into the liquid collecting pipe 2 to carry out pipetting, the knob 703 drives the moving block 705 to slide in the casing 701 through the screw 704 by pulling the knob 703, the position of the limiting plate 707 is moved, when the knob 703 moves to the scale specified by the graduated scale 702, the knob 703 is rotated, the screw 704 is pulled to be attached to the surface of the graduated scale 702 through threads by rotating the knob 703, the positions of the moving block 705 and the limiting plate 707 are fixed, and the movement of the moving plate 706 is limited by the limiting plate 707, so that the amount of the liquid extracted by the piston 8 is limited.

Example two

The embodiment comprises the following steps: the anti-slip structure 4 comprises an adhesive layer 401, a rubber shell 402, anti-slip particles 403 and a baffle 404, wherein the adhesive layer 401 is arranged on the outer side of the cylinder body 3, the rubber shell 402 is arranged on the outer side of the adhesive layer 401, the anti-slip particles 403 are fixed with a plurality of groups on the outer side of the rubber shell 402, the anti-slip particles 403 of the groups are distributed at equal intervals on the outer side of the rubber shell 402, the anti-slip particles 403 of the groups are fixed with a plurality of groups on the outer side of the rubber shell 402, and the anti-slip particles 403 of the groups are distributed at equal intervals on the outer side of the rubber shell 402.

In this embodiment, the rubber shell 402 is fixed on the outer side of the cylinder 3 through the adhesive layer 401, so that the outer wall of the cylinder 3 is soft and convenient to hold, meanwhile, the anti-slip particles 403 make the surface of the rubber shell 402 uneven, so that the friction force between the rubber shell 402 and the hand is increased, and the holding position is limited through the baffle 404, so that the device is not easy to slip downwards.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A quantitative pipette, comprising a suction tube (1), a liquid collection tube (2) and a barrel (3), characterized in that: the utility model discloses a liquid collecting pipe, including straw (1), barrel (3), suction nozzle (10), barrel (3) are installed on the outside on straw (1) top, barrel (3) are installed on the top of barrel (2), and suction nozzle (10) are seted up to the inside of barrel (3) bottom, the outside of barrel (3) is provided with anti-skidding structure (4), one side of barrel (3) is provided with limit structure (7), the inside of barrel (3) is fixed with spring (9), and the top of spring (9) is provided with piston (8), the top of piston (8) is fixed with connecting rod (5), press (6) are installed on the top of connecting rod (5), limit structure (7) are including cover shell (701), scale (702), knob (703), screw rod (704), movable block (705) and limiting plate (707), cover shell (701) is fixed in one side of barrel (3), one side of cover shell (701) is fixed with scale (702).

2. A quantitative pipette according to claim 1, wherein: the inside of cover shell (701) is provided with movable block (705), inside of movable block (705) one side is inserted and is equipped with screw rod (704), one side of screw rod (704) is fixed with knob (703), one side of movable block (705) is fixed with limiting plate (707), movable plate (706) are fixed in the outside of connecting rod (5).

3. A quantitative pipette according to claim 2, characterized in that: external threads are arranged on the outer side wall of the screw rod (704), and internal threads matched with the external threads are arranged inside the moving block (705).

4. A quantitative pipette according to claim 1, wherein: a sliding structure is formed between the moving block (705) and the casing (701), and the limiting plate (707) extends to the inside of the casing (701) to be connected with the moving block (705).

5. A quantitative pipette according to claim 1, wherein: the anti-slip structure (4) comprises an adhesive layer (401), a rubber shell (402), anti-slip particles (403) and a baffle plate (404), wherein the adhesive layer (401) is arranged on the outer side of the cylinder (3), and the rubber shell (402) is arranged on the outer side of the adhesive layer (401).

6. A quantitative pipette according to claim 5, wherein: anti-slip particles (403) are fixed on the outer side of the rubber shell (402), and a baffle (404) is fixed at the bottom end of the rubber shell (402).

7. A quantitative pipette according to claim 5, wherein: the anti-slip particles (403) are fixed with a plurality of groups on the outer side of the rubber shell (402), and the anti-slip particles (403) of the groups are distributed on the outer side of the rubber shell (402) at equal intervals.