A sample pipette for microbial detection

Abstract

The utility model discloses a sample pipette for microorganism detection, including a handle and a gun head rotatably connected to the bottom of the handle, an isolation cover movably sleeved on the surface of the gun head, micropores are evenly arranged at the position near the bottom of the isolation cover surface, a pipetting window is arranged at the middle of the front of the isolation cover, a front give way groove is arranged above the front of the isolation cover, a rear give way groove is arranged above the back of the isolation cover, inverted L-shaped movable grooves are symmetrically arranged at the positions near the top on both sides of the isolation cover, circular card grooves are arranged at the bottom and corner positions of the movable grooves, and connecting columns are arranged on both sides of the gun head. The utility model is provided with an isolation cover that can be moved up and down and flipped forward and backward and has micropores on the surface. When aspirating food solution, the isolation cover blocks the larger food tissues in the food solution through the micropores, and the pipette can discharge the transferred sample solution through the pipetting window. Repeated operations can continuously and conveniently transfer samples, avoiding the influence of insufficient sample aspiration on the detection results.

Description

Technical Field

[0001] The utility model relates to the technical field of experimental instruments, in particular to a sample pipette for microbial detection. Background Art

[0002] Food testing often involves safety and quality testing such as pesticide residue testing and microbial testing to ensure the safety of food sales. When testing food, the food needs to be crushed or chopped, added with pure water or an extractant to make a solution, and then the food solution is quantitatively drawn for testing. The pipette is currently the most practical quantitative sample sampling instrument.

[0003] In the process of food testing, the solution made from food needs to be filtered before the clear liquid is tested in some testing items; in some items, especially fruit and vegetable foods, in order to maintain the original state, the food should not be too broken up to avoid destroying the food ingredients, nor should the food solution be filtered to avoid losing too many original ingredients. At this time, when a pipette is used directly to transfer the solution, it is easy for large food tissues to block the pipette mouth, resulting in insufficient sample absorption, which in turn leads to inaccurate test results. Therefore, it is necessary to design a new sample pipette for food microbial testing. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a sample pipette for microbial detection, which is used to solve the problem that large-volume food tissues easily block the pipette orifice when the pipette draws unfiltered and fully broken food solution during food microbial detection.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A sample pipette for microbial detection, comprising a handle and a gun head rotatably connected to the bottom of the handle, a connecting nozzle at the bottom of the gun head movably sleeved with a pipette, an isolation cover movably sleeved on the surface of the gun head, micropores are evenly arranged at a position near the bottom of the isolation cover surface, a pipette window is arranged at the middle of the front side of the isolation cover, a front give way groove is arranged above the front side of the isolation cover, a rear give way groove is arranged above the back side of the isolation cover, a push-pull handle is arranged at a position above the pipette window on the front side of the isolation cover, inverted L-shaped movable grooves are symmetrically arranged at positions near the top on both sides of the isolation cover, the lateral part of the top of the movable groove extends toward the front side and is connected with the front give way groove, circular clamping grooves are arranged at the bottom and corner positions of the movable groove, connecting columns are arranged on both sides of the gun head, and the isolation cover is movably mounted on the gun head through the clamping grooves and the connecting columns.

[0007] Preferably, the micropores are only arranged at the bottom of the front and back sides of the isolation cover.

[0008] Preferably, the caliber of the micropore is smaller than the diameter of the suction port of the pipette.

[0009] Preferably, the lengths of the pipetting window, the front clearance groove and the rear clearance groove are not less than the width of the gun tip.

[0010] Preferably, the push-pull handle is provided with anti-slip grooves.

[0011] Preferably, the front give-way groove corresponds to the position of the lateral part of the movable groove, and the rear give-way groove corresponds to the position of the entire movable groove.

[0012] Preferably, the size of the slot is adapted to that of the connecting column, and the width of the movable slot is smaller than the diameter of the slot.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model provides an isolation cover which can be moved up and down and flipped forward and backward and has micropores on its surface. When a food solution is sucked, the isolation cover blocks food tissues with larger volumes in the food solution through the micropores. The size of the micropores is much larger than the filter mesh holes of common experimental filtration filter paper, so that the food tissues are isolated but not filtered. When the isolation cover is pushed downward and flipped, the pipette can discharge the transferred sample solution through the pipette window. Repeating the operation can continuously and conveniently transfer the sample, thereby blocking food tissues with larger volumes in the food solution, avoiding the influence of insufficient sample suction on the test result, and solving the problem that the pipette mouth is easily blocked by food tissues with larger volumes when the pipette sucks unfiltered and fully broken food solution in the process of food microorganism detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0016] Figure 2 This is a three-dimensional diagram of the isolation cover of the utility model;

[0017] Figure 3 It is a right sectional view of the isolation cover of the utility model.

[0018] In the figure: 1. handle; 2. gun tip; 21. connecting nozzle; 22. connecting column; 3. pipette; 4. isolation cover; 41. micropore; 42. pipetting window; 43. front clearance groove; 44. rear clearance groove; 45. push-pull handle; 46. movable groove; 47. card slot. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] like Figure 1-3 As shown, the utility model provides a technical solution: a sample pipette for microbial detection, comprising a handle 1 and a gun head 2 rotatably connected to the bottom of the handle 1, a connecting nozzle 21 at the bottom of the gun head 2 movably sleeved with a pipette 3, an isolation cover 4 movably sleeved on the surface of the gun head 2, micropores 41 are evenly arranged at positions near the bottom of the isolation cover 4, the micropores 41 are only arranged at the bottom of the front and back sides of the isolation cover 4, and the caliber of the micropores 41 is smaller than the diameter of the suction port of the pipette 3, for example, if the diameter of the suction port of the pipette 3 is 2 mm, the diameter of the micropores 41 can be 1-1.8 mm;

[0021] A pipetting window 42 is provided in the middle of the front of the isolation cover 4, a front clearance groove 43 is provided above the front of the isolation cover 4, and a rear clearance groove 44 is provided above the back of the isolation cover 4. The lengths of the pipetting window 42, the front clearance groove 43 and the rear clearance groove 44 are not less than the width of the gun head 2. The front clearance groove 43 corresponds to the position of the lateral part of the movable groove 46, and the rear clearance groove 44 corresponds to the position of the entire movable groove 46. The functions of the front clearance groove 43 and the rear clearance groove 44 are to facilitate the installation and front and rear flipping of the isolation cover 4 without being blocked by the gun head 2.

[0022] A push-pull handle 45 is provided on the front of the isolation cover 4 at a position above the pipetting window 42. The push-pull handle 45 is provided with anti-slip grooves. The push-pull handle 45 is used to push and pull the isolation cover 4 in the vertical direction and drive the isolation cover 4 to flip around the connecting column 22. The slot 47 is adapted to the size of the connecting column 22. The width of the movable slot 46 is smaller than the diameter of the slot 47, so that the isolation cover 4 can stay and flip when the connecting column 22 is stuck in the slot 47. The isolation cover 4 can be pushed and pulled and moved up and down along the vertical part of the movable slot 46.

[0023] Inverted L-shaped movable grooves 46 are symmetrically arranged at positions near the top of both sides of the isolation cover 4. The top lateral part of the movable groove 46 extends to the front and is connected with the front give-way groove 43. Circular clamping grooves 47 are arranged at the bottom and corner positions of the movable groove 46. Connecting columns 22 are arranged on both sides of the gun head 2. The isolation cover 4 is movably installed on the gun head 2 through the clamping grooves 47 and the connecting columns 22.

[0024] Working principle: the gun head 2 passes through the pipetting window 42 of the isolation cover 4 from top to bottom, the lateral part of the movable groove 46 is aligned with the connecting column 22 of the gun head 2 and is inserted, the isolation cover 4 is installed, and the push-pull handle 45 is pulled upward to make the connecting column 22 slide from the upper slot 47 into the lower slot 47, the isolation cover 4 is sleeved on the outside of the pipette 3, and the lower half of the isolation cover 4 not exceeding the pipetting window 42 is immersed in the food solution, and the pipette 3 can be controlled to absorb the sample solution through the button on the handle 1. When transferring and discharging the sample, the push-pull handle 45 is pushed downward to make the connecting column 22 slide from the lower slot 47 into the upper slot 47, and the push-pull handle 45 is pulled forward. The bottom of the isolation cover 4 is flipped backward around the connecting column 22, and the pipette 3 extends out of the pipetting window 42 to discharge the transferred sample. The operation is simple and easy to use. The sample can be transferred repeatedly. The isolation cover 4 blocks the larger food tissue in the food solution through the micropores 41, which serves the purpose of isolating the food tissue but not filtering, thereby avoiding the influence of insufficient sample absorption on the test result.

[0025] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sample pipette for microbial detection, comprising a handle (1) and a gun head (2) rotatably connected to the bottom of the handle (1), wherein a connecting nozzle (21) at the bottom of the gun head (2) is movably sleeved with a pipette (3), characterized in that: The surface of the gun head (2) is movably sleeved with an isolation cover (4), and micropores (41) are evenly arranged at a position near the bottom of the surface of the isolation cover (4), a pipetting window (42) is arranged in the middle of the front side of the isolation cover (4), a front clearance groove (43) is arranged above the front side of the isolation cover (4), and a rear clearance groove (44) is arranged above the back side of the isolation cover (4), and a push-pull handle (44) is arranged at a position above the pipetting window (42) on the front side of the isolation cover (4). 5), inverted L-shaped movable grooves (46) are symmetrically arranged at positions near the top of both sides of the isolation cover (4), the top lateral part of the movable groove (46) extends to the front and is connected to the front clearance groove (43), and circular clamping grooves (47) are arranged at the bottom and corner positions of the movable groove (46), and connecting columns (22) are arranged on both sides of the gun head (2), and the isolation cover (4) is movably installed on the gun head (2) by clamping the clamping grooves (47) and the connecting columns (22).

2. The sample pipette for microorganism detection according to claim 1, characterized in that: The micropores (41) are only arranged at the bottom of the front and back sides of the isolation cover (4).

3. The sample pipette for microorganism detection according to claim 1, characterized in that: The diameter of the micropore (41) is smaller than the diameter of the suction port of the pipette (3).

4. The sample pipette for microorganism detection according to claim 1, characterized in that: The lengths of the pipetting window (42), the front clearance groove (43) and the rear clearance groove (44) are not less than the width of the gun head (2).

5. The sample pipette for microorganism detection according to claim 1, characterized in that: The push-pull handle (45) is provided with anti-slip grooves.

6. The sample pipette for microorganism detection according to claim 1, characterized in that: The front clearance groove (43) corresponds to the position of the lateral part of the movable groove (46), and the rear clearance groove (44) corresponds to the position of the entire movable groove (46).

7. The sample pipette for microorganism detection according to claim 1, characterized in that: The size of the clamping slot (47) is adapted to that of the connecting column (22), and the width of the movable slot (46) is smaller than the diameter of the clamping slot (47).

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