Telescopic pipetting suction head

Abstract

The utility model relates to the technical field of telescopic pipetting tips, in particular to a telescopic pipetting tip which comprises a rotating cover and a pipettor, the top of the rotating cover is fixedly connected with a sealing cover, and a pressing mechanism is inserted into the sealing cover; the device comprises a pipettor, the bottom of the pipettor is in threaded connection with a fixed joint, the bottom of the fixed joint is in sliding connection with a telescopic mechanism, a sliding hole is formed in the surface of the pipettor, and an adjusting mechanism is in sliding connection with the interior of the sliding hole. The pressure block drives the pressure column to downwards press, and the pressure column drives the lower pressure block to downwards press, so that an environment in a negative pressure state is generated in the pipettor, the pipetting purpose can be achieved by suction, the automatic return function can be started through the arrangement of the spring, the working convenience of workers is improved, and when the pipettor is used through the arrangement of the telescopic pipe, the suction head and the soft rubber head, the telescopic pipe is inserted into the suction head and the soft rubber head. The telescopic pipe is slidably connected with a suction head.

Description

Technical Field

[0001] The utility model relates to the technical field of retractable liquid transfer tips, in particular to a retractable liquid transfer tip. Background Art

[0002] Pipette tips are a type of consumable that is widely used in the fields of medicine, biology, chemistry, etc. They are used in conjunction with a pipette to quantitatively measure liquids. Structurally, a pipette tip includes a pipette and a tip connected to the pipette. The tip is a split structure on the pipette, that is, the tip is a replaceable structure. In experimental research in various industries such as biology, chemistry, food, and medicine, pipette tips are one of the most frequently used and consumed experimental consumables. At present, there are mostly two ways to install existing pipettes and tips. One installation method uses a sealing ring. Since the sealing ring uses an extrusion seal, its durability is poor. The other installation method uses a hard seal, that is, the pipette is directly inserted into the tip. This has a large insertion and extraction force, is inconvenient to operate, and is not suitable for high-throughput applications.

[0003] A pipette tip disclosed in publication number CN 218077978 U comprises a tip, wherein an assembly cavity extends upward from the top of the tip, and a convex portion is provided on the inner wall of the assembly cavity in the circumferential direction; a bayonet portion adapted to the convex portion is provided on the outer circumferential direction of the pipette; wherein, when the pipette is inserted into the assembly cavity, the convex portion and the bayonet portion are assembled to fix the pipette and the tip, and a horizontal positioning platform is also provided between the assembly cavity and the top of the tip; when the pipette is inserted into the tip, the bottom of the pipette abuts against the positioning platform; the utility model utilizes the convex point assembly of the tip and the pipette, so that the insertion and removal force of the tip and the pipette is small, the insertion and removal are convenient, and the sealing and durability are good, and at the same time, the insertion depth of the pipette can be positioned by using the positioning platform to ensure that the insertion depth of each pipette is consistent, so as to meet the application of high throughput, and can be well applied in cell culture, nucleic acid detection and automation.

[0004] However, when the pipette tip is set up, the corresponding length of the pipette tip cannot be adjusted. Therefore, when pipetting, it cannot adapt to liquid storage bottles of different depths. Therefore, in daily use, it brings certain inconveniences to the staff, and therefore the role it plays in related fields is relatively limited. Utility Model Content

[0005] The purpose of the utility model is to provide a retractable liquid transfer tip to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A retractable pipette tip, a rotating cover, a sealing cover fixedly connected to the top of the rotating cover, and a pressing mechanism inserted into the sealing cover;

[0008] A pipette, wherein a fixed joint is threadedly connected to the bottom of the pipette, a telescopic mechanism is slidably connected to the bottom of the fixed joint, a sliding hole is opened on the surface of the pipette, an adjustment mechanism is slidably connected inside the sliding hole, and the adjustment mechanism includes a pressing block, a clamping block, and a resisting column, a clamping block is fixedly connected to one side of the pressing block, and a resisting column is fixedly connected to the bottom of the pressing block.

[0009] Preferably, the pressing mechanism comprises a pressing block, a pressing column, a spring, and a lower pressing block; the bottom of the pressing block is fixedly connected to the pressing column, the surface of the pressing column is sleeved with a spring, and the bottom of the pressing column is fixedly connected to the lower pressing block.

[0010] Preferably, the telescopic mechanism comprises a telescopic tube, a suction head, and a soft rubber head. The suction head is plugged into the bottom of the telescopic tube, and the soft rubber head is fixedly connected to the bottom of the suction head.

[0011] Preferably, a clamping hole is opened on one side of the sliding hole, and a threaded ring is fixedly connected to the top of the fixed joint.

[0012] Preferably, a rubber sheet is fixedly connected to the bottom of the lower pressing block.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The retractable pipette tip is provided with a pressure block, a pressure column, a spring and a lower pressure block. When in use, a staff member holds the device and presses the pressure block downward at the same time. The pressure block drives the pressure column downward, and the pressure column drives the lower pressure block downward, thereby achieving a negative pressure environment inside the pipette, so that the purpose of pipetting can be achieved by suction. The setting of the spring can start the automatic return function, thereby increasing the convenience of the staff's work. Through the setting of the telescopic tube, the suction head and the soft rubber head, when in use, the telescopic tube is slidably connected with the suction head, and the bottom of the suction head is fixedly connected with the soft rubber head, thereby achieving the purpose of adapting to containers of different sizes. Through the setting of the soft rubber head, when in use, by pressing the pressing mechanism, negative pressure is generated inside to expand the soft rubber head, thereby achieving the purpose of sucking liquid. After sucking, the soft rubber head will close, thereby avoiding the situation of internal suction liquid dripping.

[0015] The retractable pipette tip is provided with a pressing block, a clamping block and a resisting column. When in use, the staff pushes the pressing block, so that the resisting column resists the retractable mechanism when pushed downward, thereby achieving the purpose of adjusting the length of the pipette tip. At the same time, the clamping block can be clamped in the inside of the clamping hole to achieve the purpose of fixing. The rubber sheet can prevent internal air pressure leakage during use, thereby achieving the purpose of sealing and avoiding the situation that the air pressure leakage causes the failure to aspirate liquid. The threaded ring can be provided to fix the pipette during use. At the same time, when there is a blockage or failure inside, the fixed joint can be removed through the threaded ring to repair the inside. The clamping hole can be provided to fix the pipette tip when in use when the pipette tip is adjusted to a suitable length. The clamping block can be clamped in the inside of the clamping hole to achieve the purpose of fixing. At the same time, the situation that the pipette tip is not fixed during the aspiration process, thereby avoiding the situation that the pipette tip retracts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall appearance of the utility model;

[0017] Figure 2 It is an internal schematic diagram of the utility model;

[0018] Figure 3 It is an internal schematic diagram of the utility model;

[0019] Figure 4 It is a top view schematic diagram of the utility model.

[0020] In the figure: 1. rotating cover; 2. sealing cover; 3. pipette; 4. fixed joint; 5. sliding hole; 6. pressure block; 7. pressure column; 8. spring; 9. lower pressure block; 10. telescopic tube; 11. suction tip; 12. soft rubber tip; 13. pressing block; 14. clamping block; 15. resisting column; 16. clamping hole; 17. threaded ring; 18. rubber sheet. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0023] A retractable liquid transfer tip, comprising a rotating cover 1, a sealing cover 2 fixedly connected to the top of the rotating cover 1, and a pressing mechanism inserted into the sealing cover 2;

[0024] The pipette 3 has a fixed joint 4 threadedly connected to the bottom of the pipette 3, and a telescopic mechanism is slidably connected to the bottom of the fixed joint 4. A sliding hole 5 is provided on the surface of the pipette 3, and an adjustment mechanism is slidably connected inside the sliding hole 5. The adjustment mechanism includes a pressing block 13, a clamping block 14, and a supporting column 15. The clamping block 14 is fixedly connected to one side of the pressing block 13, and the supporting column 15 is fixedly connected to the bottom of the pressing block 13. When in use, the staff pushes the pressing block 13, and the supporting column 15 pushes against the telescopic mechanism when pushing downward, thereby achieving the purpose of adjusting the length of the suction head 11. At the same time, the setting of the clamping block 14 can be clamped in the inside of the clamping hole 16, thereby achieving the purpose of fixing;

[0025] In the present embodiment, preferably, the pressing mechanism includes a pressing block 6, a pressing column 7, a spring 8, and a lower pressing block 9. The bottom of the pressing block 6 is fixedly connected to the pressing column 7, the surface of the pressing column 7 is sleeved with a spring 8, and the bottom of the pressing column 7 is fixedly connected to the lower pressing block 9. When in use, the staff holds the device and presses the pressing block 6 downward at the same time. The pressing block 6 drives the pressing column 7 downward, and the pressing column 7 drives the lower pressing block 9 downward, thereby achieving an environment in which a negative pressure state is generated inside the pipette 3, so that the purpose of pipetting can be achieved by suction. The setting of the spring 8 can activate the automatic return function, thereby increasing the convenience of the staff's work;

[0026] In this embodiment, preferably, the telescopic mechanism includes a telescopic tube 10, a suction head 11, and a soft rubber head 12. The suction head 11 is plugged into the bottom of the telescopic tube 10, and the soft rubber head 12 is fixedly connected to the bottom of the suction head 11. When in use, the telescopic tube 10 is slidably connected to the suction head 11, and the soft rubber head 12 is fixedly connected to the bottom of the suction head 11, thereby achieving the purpose of adapting to containers of different sizes. Through the setting of the soft rubber head 12, when in use, by pressing the pressing mechanism, negative pressure is generated inside to open the soft rubber head 12, thereby achieving the purpose of sucking liquid. After sucking, the soft rubber head 12 will close up, thereby avoiding the situation where the internal sucked liquid drips out;

[0027] In this embodiment, preferably, a clamping hole 16 is opened on one side of the slide hole 5, and a threaded ring 17 is fixedly connected to the top of the fixed joint 4. When in use, the pipette 3 can be fixed. At the same time, when there is a blockage or failure inside, the fixed joint 4 can be removed through the threaded ring 17 to repair the inside. When in use, when the suction head 11 is adjusted to an appropriate length, the clamping block 14 can be clamped inside the clamping hole 16 to achieve the fixing effect, and at the same time avoid the situation in which the suction head 11 is not fixed during the liquid aspiration process, thereby causing the suction head 11 to retract;

[0028] In this embodiment, preferably, a rubber sheet 18 is fixedly connected to the bottom of the lower pressing block 9. When in use, the rubber sheet 18 prevents internal air pressure leakage, thereby achieving the purpose of sealing and avoiding the situation where liquid cannot be sucked due to air pressure leakage.

[0029] When a retractable liquid transfer suction tip of the present embodiment is in use, through the arrangement of the pressing block 6, the pressing column 7, the spring 8, and the lower pressing block 9, when in use, the staff holds the device and presses the pressing block 6 downward at the same time, the pressing block 6 drives the pressing column 7 downward, and the pressing column 7 drives the lower pressing block 9 downward, thereby achieving an environment in which a negative pressure state is generated inside the pipette 3, so that the purpose of suction and pipetting can be achieved. The arrangement of the spring 8 can activate the function of automatic return, thereby increasing the convenience of the staff's work. Through the arrangement of the telescopic tube 10, the suction head 11, and the soft rubber head 12, when in use, the telescopic tube 10 is slidably connected with the suction head 11, and the bottom of the suction head 11 is fixedly connected with the soft rubber head 12, thereby achieving the purpose of adapting to containers of different sizes. Through the arrangement of the soft rubber head 12, when in use, by pressing the pressing mechanism, negative pressure is generated inside, thereby the soft rubber head 12 is stretched open, thereby achieving the purpose of suction. After suction, the soft rubber head 12 will close, thereby avoiding the situation where the internal suction liquid drips out. When in use, the staff pushes the button 13, so that the support column 15 will resist the telescopic mechanism when pushing downward, thereby achieving the purpose of adjusting the length of the suction head 11. At the same time, the setting of the block 14 can be stuck in the inside of the card hole 16, so as to achieve the purpose of fixing. Through the setting of the rubber sheet 18, when in use, the rubber sheet 18 prevents the internal air pressure from leaking, thereby achieving the purpose of sealing, and avoiding the situation where the air pressure leakage causes the inability to absorb liquid. Through the setting of the threaded ring 17, when in use, it can be used to fix the pipette 3. At the same time, when there is a blockage or failure inside, the fixed joint 4 can also be removed by the threaded ring 17, so as to repair the inside. Through the setting of the card hole 16, when in use, when the suction head 11 is adjusted to an appropriate length, the block 14 can be connected to the inside of the card hole 16, so as to achieve the fixing effect, and at the same time, it is avoided that during the liquid absorption process, it is not fixed, thereby causing the suction head 11 to retract.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A retractable pipette tip, characterized in that: include A rotating cover (1), the top of the rotating cover (1) being fixedly connected to a sealing cover (2), the sealing cover (2) being internally plugged with a pressing mechanism; A pipette (3), wherein a fixed joint (4) is threadedly connected to the bottom of the pipette (3), a telescopic mechanism is slidably connected to the bottom of the fixed joint (4), a sliding hole (5) is opened on the surface of the pipette (3), an adjustment mechanism is slidably connected inside the sliding hole (5), and the adjustment mechanism comprises a pressing block (13), a clamping block (14), and a support column (15), one side of the pressing block (13) is fixedly connected to the clamping block (14), and the bottom of the pressing block (13) is fixedly connected to the support column (15).

2. A retractable pipette tip according to claim 1, characterized in that: The pressing mechanism comprises a pressing block (6), a pressing column (7), a spring (8), and a lower pressing block (9); the bottom of the pressing block (6) is fixedly connected to the pressing column (7); the surface of the pressing column (7) is sleeved with the spring (8); and the bottom of the pressing column (7) is fixedly connected to the lower pressing block (9).

3. A retractable pipette tip according to claim 1, characterized in that: The telescopic mechanism comprises a telescopic tube (10), a suction head (11), and a soft rubber head (12); the suction head (11) is plugged into the bottom of the telescopic tube (10), and the soft rubber head (12) is fixedly connected to the bottom of the suction head (11).

4. The retractable pipette tip according to claim 1, characterized in that: A clamping hole (16) is provided on one side of the sliding hole (5), and a threaded ring (17) is fixedly connected to the top of the fixed joint (4).

5. The retractable pipette tip according to claim 2, characterized in that: A rubber sheet (18) is fixedly connected to the bottom of the lower pressing block (9).

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