Pipette and test tube

Abstract

The utility model provides a transfer pipette and a test tube, and the transfer pipette comprises a tube body which is provided with a first upper opening positioned at the upper end, and an overflowing opening and a swab mounting opening which are positioned at the lower end; the fixing plug comprises a plug body arranged at the first upper opening and a protruding structure which is arranged on the plug body and extends upwards, and a through hole is formed in the plug body; the operating head is arranged at the upper end of the tube body in a sleeving mode and covers the fixing plug, and a cavity in the operating head is communicated with a cavity in the tube body through a through hole. By applying the technical scheme provided by the utility model, the problem that the operating head of the pipette in the prior art is easily separated from the pipette body during smearing operation can be effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of experimental apparatus, and more specifically, to a pipette and a test tube. Background Technology

[0002] A pipette is a measuring instrument used to accurately transfer a specific volume of solution. As a dispensing instrument, it is generally only used to measure the volume of solution it dispenses. Its typical structure consists of a long, thin glass tube with a bulge in the middle, a pointed tip at the bottom, and a mark at the neck of the tube indicating the precise volume dispensed.

[0003] In practical use, it is necessary to apply the liquid before transferring it for experimental operations. However, the basic pipettes mentioned above are still insufficient to meet the needs of experimental application. To meet these needs, existing technologies have improved pipettes, such as the pipette mentioned in patent publication number CN218872249 U. This pipette includes a tube body with an operating port at the top and a dispensing port at the bottom. A quick-release connector is also located at the bottom of the tube body, adjacent to the dispensing port, for attaching the tip of a sampling swab. When application is required, the operator can pinch the connection between the operating tip and the tube body, using the swab to apply the liquid. After application, the sampling swab is removed, restoring the pipette to its original state, allowing for accurate transfer of a specific volume of sampled liquid for testing.

[0004] When applying the above-mentioned pipettes, if the application force is too great, the pipette tip may easily detach from the pipette body, causing the pipette to malfunction. Summary of the Invention

[0005] The main purpose of this invention is to provide a pipette and test tube to solve the problem that the operating head of the pipette is easy to detach from the tube body during the application operation in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a pipette is provided, comprising: a pipette body having a first upper opening at the upper end and a flow port and a swab mounting port at the lower end; a fixing plug including a plug body disposed at the first upper opening and a protruding structure disposed on the plug body and extending upward, the plug body having a through hole; and an operating head sleeved on the upper end of the pipette body and covering the fixing plug, the cavity inside the operating head communicating with the cavity inside the pipette body through the through hole.

[0007] In one embodiment, the protrusion structure is a column disposed at the center of the plug body; or, the protrusion structure includes a limiting structure extending horizontally toward the side wall of the operating head and a first connecting structure connecting the limiting structure and the plug body.

[0008] In one embodiment, when the protruding structure is a column, the upward extension height h of the column needs to simultaneously satisfy Arccos greater than or equal to 60° and h less than or equal to the height H, where R is the radius of the fixed plug and H is the distance between the upper surface of the plug and the top of the operating head.

[0009] In one embodiment, the plug body includes an mounting cylinder and a cover plate located at the upper opening of the mounting cylinder, with a through hole provided on the cover plate.

[0010] In one embodiment, the pipette further includes a cap, comprising a cap body and a stop structure disposed on the upper part of the cap body, wherein the operating head passes through the top wall of the cap body and the stop structure is located on the side of the operating head.

[0011] In one embodiment, the protrusion structure is a column located at the center of the plug body. The height h of the column extending upward needs to simultaneously satisfy Arccos greater than or equal to 60° and h less than or equal to the height H, where R is the radius of the fixed plug, H is the distance between the upper surface of the plug body and the top of the operating head, and the height of the stop structure is greater than or equal to the height h of the protrusion structure.

[0012] In one embodiment, the stop structure includes two baffles located on opposite sides of the operating head, with two opposing clearance openings between the two baffles.

[0013] In one embodiment, the inner surface of the sidewall of the cap has a second connecting structure.

[0014] According to another aspect of the present invention, a test tube is provided, comprising: a test tube body having a second upper opening at the upper end; and a pipette, wherein the pipette is the aforementioned pipette, and the pipette body extends into the test tube body through the second upper opening.

[0015] According to a final aspect of the present invention, a test tube is provided, comprising: a test tube body having a second upper opening at the upper end; a pipette, wherein the pipette is the aforementioned pipette, the pipette body extending into the test tube body through the second upper opening, and a mating structure provided on the outer wall of the test tube body for engaging with a second connecting structure of the pipette cap to connect the pipette and the test tube body.

[0016] By applying the technical solution of this utility model, as the application force increases, an angle is created between the tube body and the operating head, and the protruding structure begins to approach the inner wall of the operating head. When the application force reaches a certain level, the protruding structure contacts the inner wall of the operating head. As the application force continues to increase, the protruding structure can limit the angle between the operating head and the tube body by stopping the operator's hand. Even if the application force increases further, the angle between the operating head and the tube body no longer changes, thus ensuring that even with vigorous application, the operating head will not detach from the tube body, guaranteeing the reliability of the pipette.

[0017] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The present utility model will now be described in further detail with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0019] Figure 1 A longitudinal sectional view of a pipette according to a first embodiment of the present invention is shown;

[0020] Figure 2 It shows Figure 1 An enlarged schematic diagram of point A on the pipette;

[0021] Figure 3 It shows Figure 2 An enlarged schematic diagram of the structure at point B of the pipette;

[0022] Figure 4 It shows Figure 1 A three-dimensional structural diagram of the fixing plug of a pipette;

[0023] Figure 5 It shows Figure 4 A schematic diagram of the longitudinal section of the fixed plug;

[0024] Figure 6 It shows Figure 1 A three-dimensional structural diagram of the cap of a pipette;

[0025] Figure 7 A partially enlarged longitudinal section view of Embodiment 2 of the pipette according to the present invention is shown;

[0026] Figure 8 It shows Figure 7 A three-dimensional structural diagram of the fixing plug of a pipette;

[0027] Figure 9 A three-dimensional structural schematic diagram of an embodiment of a test tube according to the present invention is shown; and

[0028] Figure 10 It shows Figure 9 A schematic diagram of the longitudinal section of the test tube.

[0029] The above figures include the following reference numerals:

[0030] 10. Tube body; 11. First upper opening; 12. Flow port; 13. Mounting port; 14. Second constriction structure; 20. Fixing plug; 21. Plug body; 211. Through hole; 212. Mounting cylinder; 213. Cover plate; 214. First constriction structure; 22. Protruding structure; 221. Limiting structure; 222. First connecting structure; 30. Operating head; 40. Tube cap; 41. Cap body; 411. Second connecting structure; 42. Stop structure; 421. Baffle; 422. Clearance port; 50. Test tube body; 51. Second upper opening; 52. Fitting structure; 60. Pipette; 70. Swab. Detailed Implementation

[0031] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0035] The inventors discovered during long-term research that when applying the product with a swab, the operating head 30 forms an angle with the tube body 10. If the application force is too great, this angle becomes too large, making it easy for the operating head 30 to detach from the tube body 10. To solve this problem, as... Figures 1 to 6 As shown, in Embodiment 1, the pipette includes: a pipette body 10, a retaining plug 20, and an operating head 30. The pipette body 10 has a first upper opening 11 at its upper end, a flow port 12 at its lower end, and a swab mounting port 13. The retaining plug 20 includes a plug body 21 disposed at the first upper opening 11 of the pipette body 10 and a protruding structure 22 disposed on the plug body 21 and extending upward, with a through hole 211 provided on the plug body 21. The operating head 30 is sleeved on the upper end of the pipette body 10 and covers the retaining plug 20. The cavity inside the operating head 30 communicates with the cavity inside the pipette body 10 through the through hole 211. When an external force is applied to the swab mounting port 13, the protruding structure 22 ensures that the angle between the operating head 30 and the pipette body 10 is within a predetermined range.

[0036] Applying the technical solution of this embodiment, as the application force increases, an angle is formed between the tube body 10 and the operating head 30, and the protruding structure 22 begins to approach the inner wall of the operating head 30. When the application force reaches a certain level, the protruding structure 22 contacts the inner wall of the operating head 30. When the application force continues to increase, the protruding structure 22 can limit the angle of the operating head 30 relative to the tube body 10 under the stop of the operator's hand. Even if the application force further increases, the angle between the operating head 30 and the tube body 10 no longer changes, thereby ensuring that even with vigorous application, the operating head 30 will not detach from the tube body 10, ensuring the reliability of the pipette.

[0037] It should be noted that the aforementioned operating head 30 is made of silicone or other soft materials. By squeezing the operating head 30, the liquid in the test tube can enter the pipette head for pipetting operations.

[0038] like Figures 1 to 5 As shown, in this embodiment, the protruding structure 22 is a column located at the center of the plug body 21. The above structure is simple and easy to manufacture.

[0039] like Figure 2As shown, in this embodiment, the upward extension height h of the column needs to simultaneously satisfy ArccosR / h greater than or equal to 60° and h less than or equal to the height H, where R is the radius of the fixed plug 20 and H is the distance between the upper surface of the plug body 21 and the top of the operating head 30. This structure ensures that the angle between the operating head 30 and the tube body 10 is within a more suitable range, further preventing the operating head 30 from detaching from the tube body 10.

[0040] like Figures 2 to 5 As shown, in this embodiment, the plug body 21 includes a mounting cylinder 212 and a cover plate 213 located at the upper opening of the mounting cylinder 212, with a through hole 211 disposed on the cover plate 213. The above structure is simple and low in cost, and due to the presence of the through hole 211, the fixed plug 20 does not affect the pipette's ability to pick up liquid.

[0041] like Figure 3 and Figure 5 As shown, in this embodiment, the bottom of the mounting cylinder 212 has a first constriction structure 214, and the tube body 10 has a second constriction structure 14 that cooperates with the first constriction structure 214. The above structure is simple and easy to install.

[0042] In this embodiment, the plug 21 and the protrusion structure 22 are integrally formed. The above structure is simple and easy to process.

[0043] like Figure 1 , Figure 2 and Figure 6 As shown, preferably, in this embodiment, the pipette further includes a cap 40, which includes a cap body 41 and a stop structure 42 disposed on the upper part of the cap body 41. The operating head 30 passes through the top wall of the cap body 41, and the stop structure 42 is located on the side of the operating head 30. Specifically, when the application force is too great, the protruding structure 22, under the stop of the stop structure 42, restricts the angle of the operating head 30 relative to the pipette body 10. Even if the application force is further increased, the angle between the operating head 30 and the pipette body 10 will no longer change, thereby ensuring that even with strong application, the operating head 30 will not detach from the pipette body 10, ensuring the reliability of the pipette. The presence of the stop structure 42 eliminates the need for the user to push against the protruding structure 22 with their hand, thus improving the user's operating experience.

[0044] like Figure 2 As shown, in this embodiment, the height of the stop structure 42 is greater than the height h of the protruding structure 22 (column). This structure ensures that the protruding structure 22 abuts against the stop structure 42, guaranteeing an anti-detachment function. Furthermore, the stop structure 42 protects the operating head 30 from collisions. Of course, in other embodiments not shown in the figure, the height of the stop structure 42 can also be equal to the height h of the protruding structure 22 (column).

[0045] like Figure 1 , Figure 2 and Figure 6 As shown, in this embodiment, the stop structure 42 includes two baffles 421 located on opposite sides of the operating head 30, with two opposing clearance openings 422 between the two baffles 421. Specifically, during application, the operator needs to adjust the position of the pipette to ensure that the protruding structure 22 can abut against the stop structure 42. In this embodiment, the stop structure 42 is divided into two opposing baffles 421, which facilitates the operator's adjustment of the position of the pipette, thereby improving application efficiency. In addition, the two clearance openings 422 between the baffles 421 can avoid the operator's thumb and forefinger, making it easier for the operator to squeeze the operating head 30.

[0046] like Figure 2 and Figure 10 As shown, in this embodiment, the inner surface of the sidewall of the cap 41 has a second connecting structure 411. This structure allows the pipette to be connected to other structures (such as test tube bodies) to meet different needs.

[0047] like Figure 1 As shown, in this embodiment, the pipette also includes a swab 70, which is inserted into the swab mounting port 13.

[0048] The difference between the pipette of Example 2 and the pipette of Example 1 lies only in the shape of the protruding structure 22. Specifically, as shown... Figure 7 and Figure 8 As shown, in Embodiment 2, the protruding structure 22 includes a limiting structure 221 extending horizontally towards the side wall of the operating head 30, and a first connecting structure 222 connecting the limiting structure 221 and the plug 21. Specifically, as the application force increases, an angle is formed between the tube body 10 and the operating head 30, and the limiting structure 221 begins to approach the inner wall of the operating head 30. When the application force reaches a certain level, the limiting structure 221 contacts the inner wall of the operating head 30. When the application force continues to increase, the limiting structure 221 can limit the angle of the operating head 30 relative to the tube body 10 under the stop of the operator's hand. Even if the application force further increases, the angle between the operating head 30 and the tube body 10 no longer changes, thereby ensuring that even with vigorous application, the operating head 30 will not detach from the tube body 10, ensuring the reliability of the pipette. Compared to Embodiment 1, since the limiting structure 221 itself extends toward the side wall of the operating head 30, the angle between the operating head 30 and the tube body 10 can be further reduced, thereby ensuring that the operating head 30 is less likely to detach from the tube body 10.

[0049] It should be noted that in Embodiment 2, the first connecting structure 222 is a connecting post. Of course, in other embodiments not shown in the figure, the first connecting structure can be of other shapes, as long as it can serve a connecting function.

[0050] In addition, in Embodiment 2, the limiting structure 221 is a limiting ring. Of course, in other embodiments not shown in the figure, the limiting structure can also be a limiting rod.

[0051] This application also provides a test tube, such as Figure 9 and Figure 10 As shown, an embodiment of the test tube according to this application includes a test tube body 50 and a pipette 60. The test tube body 50 has a second upper opening 51 at its upper end. The pipette 60 is the aforementioned pipette, with its tube body 10 extending into the test tube body 50 through the second upper opening 51. Since the aforementioned pipette 60 has the advantage of preventing the operating tip 30 from easily detaching from the tube body 10, the test tube having it also possesses the aforementioned advantages.

[0052] like Figure 10 As shown, in this embodiment, the outer wall of the test tube body 50 is provided with a mating structure 52 that mates with the second connecting structure 411 of the cap 40 of the pipette 60. This structure allows the pipette 60 to be securely fixed to the test tube body 50, thereby facilitating the storage of the pipette 60 and the transportation of the test tube.

[0053] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0054] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0055] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A pipette, characterized in that, include: The tube body (10) has a first upper opening (11) at the upper end and an overflow port (12) and a swab mounting port (13) at the lower end. The fixing plug (20) includes a plug body (21) disposed at the first upper opening (11) and a protrusion structure (22) disposed on the plug body (21) and extending upward, wherein the plug body (21) is provided with a through hole (211). The operating head (30) is sleeved on the upper end of the tube body (10) and covered outside the fixed plug (20). The cavity inside the operating head (30) is connected to the cavity inside the tube body (10) through the through hole (211).

2. The pipette according to claim 1, characterized in that, The protruding structure (22) is a column located at the center of the plug body (21); or, the protruding structure (22) includes a limiting structure (221) extending horizontally to the side wall of the operating head (30) and a first connecting structure (222) connecting the limiting structure (221) and the plug body (21).

3. The pipette according to claim 2, characterized in that, When the protruding structure (22) is the column, the height h of the column extending upward needs to satisfy Arccos(R / h) greater than or equal to 60° and h less than or equal to the height H, where R is the radius of the fixed plug (20) and H is the distance between the upper surface of the plug body (21) and the top of the operating head (30).

4. The pipette according to claim 1, characterized in that, The plug (21) includes an installation cylinder (212) and a cover plate (213) located at the upper opening of the installation cylinder (212), and the through hole (211) is provided on the cover plate (213).

5. The pipette according to claim 1, characterized in that, The pipette also includes: The cap (40) includes a cap body (41) and a stop structure (42) disposed on the upper part of the cap body (41). The operating head (30) passes through the top wall of the cap body (41), and the stop structure (42) is located on the side of the operating head (30).

6. The pipette according to claim 5, characterized in that, The protruding structure (22) is a column located at the center of the plug body (21). The height h of the column extending upward needs to satisfy Arccos(R / h) greater than or equal to 60° and h less than or equal to the height H. Here, R is the radius of the fixed plug (20), H is the distance between the upper surface of the plug body (21) and the top of the operating head (30), and the height of the stop structure (42) is greater than or equal to the height h of the protruding structure (22).

7. The pipette according to claim 6, characterized in that, The stop structure (42) includes two baffles (421) located on opposite sides of the operating head (30), with two opposing clearance openings (422) between the two baffles (421).

8. The pipette according to any one of claims 5 to 7, characterized in that, The inner surface of the sidewall of the cap (41) has a second connecting structure (411).

9. A test tube, comprising: The test tube body (50) has a second upper opening (51) located at the upper end; A pipette (60), characterized in that the pipette (60) is the pipette according to any one of claims 1 to 8, wherein the tube body (10) of the pipette (60) extends into the test tube body (50) through the second upper opening (51).

10. A test tube, comprising: The test tube body (50) has a second upper opening (51) located at the upper end; A pipette (60), characterized in that the pipette (60) is the pipette according to claim 8, wherein the tube body (10) of the pipette (60) extends into the test tube body (50) through the second upper opening (51), and the outer wall of the test tube body (50) is provided with a mating structure (52) that mates with the second connecting structure (411) of the cap (40) of the pipette (60) to connect the pipette (60) and the test tube body (50).

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