Volume-adjustable pipette
The design of the detachable suction sleeve and drive assembly solves the problem of cleaning and disinfecting adjustable suction tubes, enabling convenient replacement of vulnerable parts and ensuring sterility. This improves service life and sterility, avoids cross-contamination, and enhances the lifespan of the suction tube and the accuracy of testing.
Patent Information
- Application Number
- CN202423298978.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-27
AI Technical Summary
Existing adjustable-capacity aspirators have a complex structure, are difficult to clean and disinfect, are prone to microbial contamination, and are inconvenient to replace vulnerable parts, affecting strict aseptic operation and testing accuracy.
Design a detachable liquid suction sleeve and drive assembly. The liquid suction sleeve is detachably connected to the device housing. The piston is driven out by a telescopic screw, which facilitates cleaning and replacement of vulnerable parts. The capacity is calculated by combining a stroke sensor and a circuit board.
It enables convenient cleaning and disinfection of the suction tube and replacement of easily damaged parts, avoids cross-contamination, and improves service life and sterility of testing.
Smart Images
Figure CN223727836U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of liquid suction container technology, and in particular relates to a liquid suction tube with adjustable capacity. Background Technology
[0002] A pipette is a laboratory tool used for the precise measurement and transfer of liquids. Based on its adjustable volume, it can be divided into fixed-volume pipettes and adjustable-volume pipettes. Fixed-volume pipettes typically have specific sizes, such as 1 mL, 5 mL, 10 mL, etc., and their volume remains constant; adjustable-volume pipettes allow for variations in the volume of liquid drawn within a certain range. Based on material, they can also be divided into glass pipettes and plastic pipettes. Glass pipettes offer good chemical stability and high precision, but are easily damaged; plastic pipettes are lightweight and less prone to breakage, making them suitable for applications where lower precision is required.
[0003] Piston-type adjustable-volume pipettes change the internal volume of the pipette by moving the piston up and down; the desired liquid volume can be flexibly set within the adjustable range. However, current adjustable-volume pipettes are usually quite complex in structure, making cleaning and sterilization difficult. If cleaning is not thorough, bacteria, mold, and other microorganisms can easily grow, potentially contaminating the liquid during subsequent use. This is a very serious problem for experiments requiring strict aseptic techniques (such as microbial culture experiments) and medical testing (such as clinical diagnostic tests). Furthermore, replacing easily damaged parts of the pipette is inconvenient.
[0004] Therefore, the aforementioned technical deficiencies urgently need to be addressed. Utility Model Content
[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a liquid suction tube with adjustable capacity, which is intended to facilitate the cleaning and disinfection of the liquid suction sleeve and piston of the liquid suction tube or the replacement of vulnerable parts, avoid cross-contamination between different test liquids, and improve the service life of the liquid suction tube.
[0006] The technical solution adopted by this application to solve the technical problem is as follows: a volume-adjustable pipette, comprising:
[0007] A liquid suction sleeve has a liquid suction end at one end for absorbing liquid. A piston is slidably connected inside the liquid suction sleeve to generate a negative pressure for absorbing liquid at the liquid suction end.
[0008] The device housing is detachably connected to one end of the liquid suction sleeve;
[0009] and a driving assembly, the driving assembly is arranged on the device housing, the driving assembly comprises a telescopic screw rod and a driving piece, the telescopic screw rod extends along the extension direction of the liquid suction sleeve, one end of the telescopic screw rod is connected with the piston, the telescopic screw rod is engaged with the driving piece, and the driving piece is used for driving the telescopic screw rod to extend or retract along the extension direction of the liquid suction sleeve.
[0010] Wherein, the driving piece is provided with a stroke sensor, and the stroke sensor is used for measuring the telescopic length of the screw rod.
[0011] The embodiment is further provided that the device housing is screwed at one end of the liquid suction sleeve.
[0012] The embodiment is further provided that the opening edge of the liquid suction sleeve is provided with a first threaded step, and the device housing is provided with a second threaded step at a position corresponding to the first threaded step, the first threaded step is engaged with the second threaded step, so that the device housing is screwed at one end of the liquid suction sleeve.
[0013] The embodiment is further provided that the liquid suction sleeve is provided with an observation window, and the observation window extends along the extension direction of the liquid suction sleeve.
[0014] The embodiment is further provided that the liquid suction sleeve is a transparent sleeve.
[0015] The embodiment is further provided that the side wall of the liquid suction sleeve is provided with a plurality of capacity marks, and the plurality of capacity marks are arranged along the extension direction of the liquid suction sleeve.
[0016] The embodiment is further provided that the driving assembly further comprises:
[0017] A circuit board, the circuit board is arranged in the device housing;
[0018] A battery, the battery is arranged in the device housing;
[0019] And at least two buttons, the buttons are arranged on the outer surface of the device housing;
[0020] Wherein, the buttons, the driving piece, the stroke sensor and the battery are electrically connected with the circuit board.
[0021] The embodiment is further provided that the side wall of the piston is provided with at least one limiting groove, the limiting groove extends along the circumferential direction of the piston, and a sealing rubber ring is sleeved on the limiting groove.
[0022] Compared with the prior art, the application provides a liquid suction tube with adjustable capacity, and the driving assembly and the liquid suction sleeve are detachably connected. When the staff needs to clean and disinfect the liquid suction sleeve and the piston or replace the vulnerable parts, the liquid suction sleeve and the device housing can be directly separated. At this time, the piston is taken out with the telescopic screw rod, so that the staff can conveniently maintain the piston. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.
[0024] Figure 1 It is a whole structure schematic diagram of the capacity-adjustable pipette provided by the embodiment;
[0025] Figure 2 It is a sectional view of the capacity-adjustable pipette provided by the embodiment;
[0026] Figure 3 It is a structure schematic diagram of the capacity-adjustable pipette in a disassembled state provided by the embodiment.
[0027] In the figure: 1, pipette sleeve; 11, pipette end; 12, piston; 121, limiting groove; 122, sealing rubber ring; 13, first threaded step; 14, capacity mark; 2, device shell; 21, second threaded step; 3, driving assembly; 31, telescopic screw rod; 32, driving piece; 33, stroke sensor; 34, circuit board; 35, battery; 36, button. DETAILED DESCRIPTION
[0028] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.
[0029] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.
[0030] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0031] In addition, the technical features involved in the different embodiments of the utility model described above can be combined with each other as long as there is no conflict between them.
[0032] The utility model provides a capacity adjustable pipette as Figure 1 , Figure 2 and Figure 3 Indicate, a kind of capacity adjustable pipette, is a kind of laboratory tool for accurately measuring and transferring liquid.Workers can adjust the capacity of pipetting according to needs;The main structure of the utility model includes: pipette sleeve 1, device housing 2 and driving assembly 3, one end of pipette sleeve 1 is provided with pipette end 11, when carrying out pipetting operation, pipette end 11 is immersed in solution to carry out pipetting, piston 12 is slidably connected in pipette sleeve 1, piston 12 is used to make pipette end 11 produce pipetting negative pressure, so that pipette end 11 can be pipetted into pipette sleeve 1 in solution;Device housing 2 is detachably connected at one end of pipette sleeve 1;Driving assembly 3 is arranged on device housing 2, driving assembly 3 includes telescopic screw rod 31 and driving part 32, telescopic screw rod 31 extends along the extension direction of pipette sleeve 1, one end of telescopic screw rod 31 is connected with piston 12, telescopic screw rod 31 is engaged with driving part 32, and driving part 32 is used to drive telescopic screw rod 31 to extend and retract along the extension direction of pipette sleeve 1;Wherein, travel sensor 33 is arranged on driving part 32, travel sensor 33 is used to measure the extension length of telescopic screw rod 31, and the circuit board 34 can be collected by travel sensor 33 Formed piston 12, so that integrated circuit can calculate the amount of pipetted solution.In some embodiments, the rotating shaft of telescopic screw rod 31 and driving part 32 is engaged, movable guide rail is arranged on device housing 2, telescopic screw rod 31 extends and retracts along movable guide rail, and limiting member for limiting the rotation of telescopic screw rod 31 is arranged on movable guide rail.Therefore, when the rotating shaft of driving part 32 rotates, it will drive the screw rod to extend and retract along the movable guide rail.
[0033] It can be understood that the specific functions of the travel sensor 33 and the driving part 32 in the present embodiment can be obtained by those skilled in the art according to the prior art, and the structure and working principle of the travel sensor 33 and the driving part 32 will not be described here.
[0034] It should be noted that the structure of the adjustable volume pipette is generally complex, which makes cleaning and disinfection more difficult. If not cleaned thoroughly, bacteria, mold and other microorganisms are likely to breed, which may contaminate the liquid in subsequent use. For experiments requiring strict sterile operation (such as microbial culture experiments) and medical detection (such as clinical diagnostic detection), this is a very serious problem. Moreover, it is inconvenient to replace the vulnerable parts of the pipette.
[0035] In the present scheme, the driving assembly 3 and the suction sleeve 1 are detachably connected. When the staff needs to clean and disinfect or replace the vulnerable parts of the suction sleeve 1 and the piston 12, the suction sleeve 1 can be directly separated from the device housing 2. At this time, the piston 12 will be taken out with the telescopic screw rod 31, which facilitates the staff to clean and disinfect or replace the vulnerable parts of the suction sleeve 1 and the piston 12 of the pipette, avoids cross contamination between different detection liquids, and improves the service life of the pipette.
[0036] Further, as shown in Figure 3 , the device housing 2 is screwed on one end of the suction sleeve 1. When the staff needs to clean and disinfect or replace the vulnerable parts of the suction sleeve 1 and the piston 12, the suction sleeve 1 can be directly rotated to separate it from the device housing 2. At this time, the piston 12 will be taken out with the telescopic screw rod 31, which facilitates the staff to clean and disinfect or replace the vulnerable parts of the suction sleeve 1 and the piston 12 of the pipette.
[0037] Further, as shown in Figure 2 and Figure 3 , the opening edge of the suction sleeve 1 is provided with a first threaded step 13, and the device housing 2 is provided with a second threaded step 21 corresponding to the first threaded step 13. The first threaded step 13 and the second threaded step 21 are engaged to screw the device housing 2 on one end of the suction sleeve 1.
[0038] Further, the suction sleeve 1 is provided with an observation window, and the observation window extends along the extension direction of the suction sleeve 1. The staff can observe the solution in the suction sleeve 1 through the observation window. At the same time, it is convenient for the staff to check the cooperation degree of the suction sleeve 1 and the piston 12 to judge whether it needs to be maintained.
[0039] Further, the suction sleeve 1 is a transparent sleeve. The transparent sleeve can allow the staff to directly observe the working cooperation of the suction sleeve 1 and the piston 12.
[0040] Further, the side wall of the suction sleeve 1 is provided with a plurality of capacity marks 14, and the plurality of capacity marks 14 are arranged along the extension direction of the suction sleeve 1. The capacity marks 14 facilitate the staff to master the suction volume of the solution.
[0041] Further, as shown inFigure 3 As shown, the driving assembly 3 further comprises a circuit board 34, a battery 35 and at least two buttons 36, the circuit board 34 is arranged in the device housing 2, the battery 35 is arranged in the device housing 2, and the buttons 36 are arranged on the outer surface of the device housing 2, wherein the buttons 36, the driving member 32, the stroke sensor 33 and the battery 35 are electrically connected with the circuit board 34. The staff can adjust the amount of suction solution through the buttons 36, and of course can also realize the functions of liquid suction and liquid output through the buttons 36.
[0042] Further, at least one limiting groove 121 is arranged on the side wall of the piston 12, the limiting groove 121 extends along the circumferential direction of the piston 12, and a sealing rubber ring 122 is sleeved on the limiting groove 121. It can be understood that the air tightness between the piston 12 and the inner side wall of the liquid suction sleeve 1 can be ensured through the sealing rubber ring 122. The gap between the two is avoided to affect the liquid suction effect.
[0043] In summary, the application provides a liquid suction tube with adjustable capacity, the driving assembly 3 and the liquid suction sleeve 1 are detachably connected. When the staff needs to clean and disinfect the liquid suction sleeve 1 and the piston 12 or replace the vulnerable parts, the liquid suction sleeve 1 can be directly separated from the device housing 2. At this time, the piston 12 will be taken out with the telescopic screw rod 31, which is convenient for the staff to maintain it.
[0044] Obviously, the above embodiments are only examples for clearly illustrating, and not limit the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The obvious changes or variations derived therefrom are still within the protection scope of the application.
Claims
1. A capacity-adjustable pipette, characterized in that, include: A liquid-absorbing sleeve, one end of which is provided with a liquid-absorbing end for absorbing liquid, and a piston is slidably connected inside the liquid-absorbing sleeve for generating a liquid-absorbing negative pressure at the liquid-absorbing end; A device housing, which is detachably connected to one end of the liquid suction sleeve; The device housing includes a drive assembly, which is disposed on the housing. The drive assembly includes a telescopic screw and a drive member. The telescopic screw extends along the extension direction of the liquid suction sleeve. One end of the telescopic screw is connected to the piston. The telescopic screw engages with the drive member, which drives the telescopic screw to extend and retract along the extension direction of the liquid suction sleeve. The drive unit is equipped with a stroke sensor, which is used to measure the extension and retraction length of the lead screw.
2. The adjustable-capacity suction tube according to claim 1, characterized in that, The device housing is screwed to one end of the liquid suction sleeve.
3. The adjustable-capacity suction tube according to claim 2, characterized in that, The opening edge of the suction sleeve is provided with a first threaded step, and the device housing is provided with a second threaded step at the position corresponding to the first threaded step. The first threaded step and the second threaded step engage so that the device housing is screwed to one end of the suction sleeve.
4. The adjustable-capacity suction tube according to claim 1, characterized in that, The suction sleeve is provided with an observation window, which extends along the extension direction of the suction sleeve.
5. The adjustable-capacity suction tube according to claim 4, characterized in that, The liquid-absorbing sleeve is a transparent sleeve.
6. The adjustable-capacity suction tube according to claim 1, characterized in that, The suction sleeve has several capacity marks on its side wall, and these capacity marks are arranged along the extension direction of the suction sleeve.
7. The adjustable-capacity suction tube according to claim 1, characterized in that, The driving component also includes: A circuit board, which is disposed within the device housing; A battery, which is disposed within the housing of the device; and at least two buttons, said buttons being disposed on the outer surface of the device housing; The button, the drive unit, the travel sensor, and the battery are all electrically connected to the circuit board.
8. The adjustable-capacity suction tube according to claim 1, characterized in that, At least one limiting groove is provided on the side wall of the piston, the limiting groove extends along the circumference of the piston, and a sealing ring is fitted on the limiting groove.