Pipette tip mechanism

Abstract

The utility model relates to the technical field of pipettors, in particular to a pipette tip mechanism. According to the technical scheme, the pipettor comprises a pipettor body and a gun head body movably installed at one end of the pipettor body, the pipettor body is provided with a gun head release button and an abutting pipe, and the pipettor further comprises a flat head arranged at the end, away from the abutting pipe, of the gun head body. Through the design of the gun head connecting pipe, the barb mechanism, the abutting mechanism and other structures, the mechanical locking between the gun head and the pipettor is increased, and the risk that the gun head falls off in the operation process is reduced. And accidents such as liquid splashing or sample pollution in operation can be reduced, and the safety and reliability of the experiment are improved. In addition, the flat head at one end of the gun head body has a larger contact area during purging, so that the liquid is more easily and completely discharged, and the purging efficiency is further improved. Meanwhile, the shearing force on cells can be reduced, and the cell damage is reduced, so that the influence on the cells is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipettes, in particular to a pipette gun head mechanism. Background Art

[0002] The pipette is a commonly used tool in laboratories for accurately measuring and transferring liquids. Existing pipette tips are typically round in shape. This design results in a larger area of ​​liquid remaining inside the tip, especially during the purging process, leading to low purging efficiency. When dealing with cell culture or biological samples, round tips can easily generate large shear forces, which can damage or rupture cells. The end of the pipette is typically equipped with a "tip release button," which can be pressed to release the tip. This design allows users to replace the tip without direct contact, thereby improving ease and hygiene. If the tip release button is accidentally pressed or the tip is not securely installed, the tip can easily fall off. Accidental detachment of the tip can lead to sample leakage or contamination, affecting the accuracy of experimental results. Utility Model Content

[0003] This utility model addresses the problem that existing pipette tips are typically round, resulting in low purging efficiency and the risk of cell damage or rupture during purging. Furthermore, pipettes are typically equipped with a "tip release button," which can easily cause the tip to fall off if the button is accidentally pressed or the tip is not securely installed. This accidental tip release can lead to sample leakage or contamination, compromising the accuracy of experimental results. Therefore, a pipette tip mechanism is proposed.

[0004] The technical solution of the utility model is as follows: a pipette gun tip mechanism, comprising a pipette body and a gun tip body movably mounted on one end of the pipette body, the pipette body being provided with a gun tip release button and an abutment tube, and further comprising: a flat head arranged at the end of the gun tip body away from the abutment tube; a gun tip connecting tube installed in the abutment tube and connected to the end of the gun tip body away from the flat head, the end of the gun tip connecting tube away from the abutment tube being provided with a barb mechanism for preventing the gun tip body mounted on the gun tip connecting tube from falling off; and an abutment mechanism, sleeved on the gun tip connecting tube, which closes the barb mechanism by manually rotating it.

[0005] Optionally, the barb mechanism includes a rotating groove provided on one end of the gun head connecting tube close to the gun head body, a plurality of rotating seats distributed in a circular array are fixedly connected to the interior of the rotating groove, the rotating seats are rotatably connected to a rotating rod 1, the end of the rotating rod 1 away from the rotating seat is fixedly connected to the thorn tube head, the inner wall of the rotating groove is fixedly connected to a plurality of reset springs distributed in a circular array and corresponding to the rotating rods, and the ends of the reset springs away from the inner wall of the rotating groove are fixedly connected to the corresponding rotating rod 1.

[0006] Optionally, the end of the rotating rod 1 close to the puncture tube head is inclined toward the inner wall of the gun head body, and the puncture tube head is inserted into the gun head body. Optionally, the abutting mechanism includes a plurality of rotating grooves distributed in a circumferential array on the gun head connecting tube and connected to the rotating groove, the interiors of the rotating grooves are provided with mutually connected limiting slides, the interiors of the limiting slides are slidably connected to arc-shaped limiting rods, the opposite ends of the arc-shaped limiting rods are fixedly connected to the rotating rod 2, the ends of the rotating rods away from the arc-shaped limiting rods are fixedly connected to the arc-shaped abutment plates, the ends of the arc-shaped abutment plates away from the rotating rod 2 are fixedly connected to the plug blocks, and the rotating rod 1 is provided with a locking hole that drives the puncture tube head to retract into the rotating groove after the plug blocks are inserted.

[0007] Optionally, one end of the plug block and the puncture tube head are both provided with a tapered tip.

[0008] Optionally, the movable sleeve on the gun head connecting tube is provided with a rotating sleeve, and the inner wall of the rotating sleeve is fixedly connected to the outer walls of the plurality of rotating rods.

[0009] Optionally, a plurality of strip-shaped convex patterns distributed in a circular array are fixedly connected to the outer wall of the rotating sleeve.

[0010] Optionally, one end of the abutment tube close to the rotating sleeve is fixedly connected to an arc-shaped abutment rod that abuts the gun head body to separate from the gun head connecting tube.

[0011] In summary, the present application includes at least one of the following beneficial technical effects of a pipette tip mechanism:

[0012] The utility model adopts the design of the gun tip connecting tube, barb mechanism and abutment mechanism, etc., which not only increases the mechanical lock between the gun tip and the pipette, reducing the risk of the gun tip falling off during operation, but also reduces accidents during operation, such as liquid splashing or sample contamination, thereby improving the safety and reliability of the experiment.

[0013] Furthermore, the flat tip at one end of the gun body provides a larger contact area during purging, making it easier for liquid to be completely discharged, thereby improving purging efficiency. At the same time, it can also reduce shear force on cells, reducing cell damage and thus reducing the impact on cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A structural schematic diagram of a pipette tip mechanism of the utility model is given;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the connecting mechanism;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of point A in the middle;

[0017] Figure 4 for Figure 2 Schematic diagram of the split structure;

[0018] Figure 5 for Figure 4 Schematic diagram of part of the structure;

[0019] Figure 6 for Figure 2 Schematic diagram of part of the structure.

[0020] Reference numerals: 1, pipette body; 11, gun tip release button; 12, pipette stopper; 13, gun tip connecting tube; 131, rotation groove; 132, rotation seat; 133, first rotation rod; 134, clamping hole; 135, piercing tip; 136, return spring; 14, arc-shaped pipette stopper; 2, gun tip body; 21, flat head; 3, rotation groove; 31, rotation sleeve; 32, second rotation rod; 33, arc-shaped limiting rod;

[0021] Arc-shaped abutment plate; 35, insert block; 36, strip-shaped convex pattern; 37, limiting slide groove. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention.

[0024] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on those shown in the accompanying drawings.

[0026] Positional or positional relationships are used solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] It should be noted that the terms "include", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising 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 device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in any one or more embodiments or examples. In the description of the present utility model, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] Example

[0029] like Figure 1-6 As shown, the present invention proposes a pipette gun tip mechanism, including a pipette body 1 and a gun tip body 2 movably mounted on one end of the pipette body 1, the pipette body 1 is provided with a gun tip release button 11 and a push tube 12, and the push tube 12. By manually pressing the gun tip release button 11, the push tube 12 can be moved toward the direction of the gun tip body 2. It also includes: a flat head 21, the shape of the flat head 21 is curved, like a duckbill, and thus better fits the edge of the culture dish. Its function is also to have a larger contact area during purging, making it easier for the liquid to be completely discharged, thereby improving the purging efficiency. At the same time, it can also reduce the shear force on the cells, reduce cell damage, and thus reduce the impact on the cells. The flat head 21 is arranged at the end of the gun head body 2 away from the anti-tube 12, and a gun head connecting tube 13 is installed inside the anti-tube 12. One end of the gun head connecting tube 13 is fixed to the end of the gun head body 2 away from the flat head 21, and the end of the gun head connecting tube 13 away from the anti-tube 12 is provided with a barb mechanism to prevent the gun head body 2 installed on the gun head connecting tube 13 from falling off. The barb mechanism makes the gun head body 2 more stable after installation, and there is no need to worry about the gun head accidentally falling off when the gun head release button 11 is pressed, thereby improving the smoothness and efficiency of the operation.

[0030] See further Figure 3As shown, the barb mechanism of the pipette in this embodiment includes a rotating groove 131 formed on the end of the pipette connecting tube 13 proximal to the pipette body 2. A plurality of rotating seats 132 arranged in a circular array are fixedly connected within the rotating groove 131. Each rotating seat 132 is rotatably connected to a rotating rod 133. The end of the rotating rod 133, distal to the rotating seat 132, is fixedly connected to a piercing tip 135 inclined toward the inner wall of the pipette body 2 and configured for insertion into the pipette body 2. The tilting of the piercing tip 135 toward the inner wall of the pipette body 2 ensures that the piercing tip 135 can be inserted into the pipette body 2 when the pipette body 2 is withdrawn. A plurality of return springs 136, arranged in a circular array and corresponding to the return springs 136, are fixedly connected to the inner wall of the rotating groove 131. The return springs 136 enable the return springs 133 to drive the corresponding return spring 135 into the inner wall of the pipette body 2. The end of each return spring 136, distal to the inner wall of the rotating groove 131, is fixedly connected to the corresponding return spring 133.

[0031] For further information, please refer to Figure 4-Figure 6 As shown, the pipette tip mechanism of this embodiment also includes a push-action mechanism, which is sleeved on the tip connecting tube 13 and manually rotated to close the barb mechanism. Specifically, the push-action mechanism includes a plurality of rotating grooves 3 arranged in a circumferential array on the tip connecting tube 13 and connected to the rotating groove 131. The rotating grooves 3 are provided with mutually connected limit slides 37. The limit slides 37 are slidably connected to the interiors of the limit slides 37. The opposite ends of the arcuate limit slides 33 are fixedly connected to the rotating rod 2 32. The tip connecting tube 13 is movably sleeved with a rotating sleeve 31. The end of the push-action tube 12 close to the rotating sleeve 31 is fixedly connected to the arcuate push-action rod 14 that pushes the tip body 2 away from the tip connecting tube 13. The outer wall of the rotating sleeve 31 is fixedly connected to a plurality of strip-shaped convex patterns 36 arranged in a circumferential array. The function of the strip-shaped convex patterns 36 is to increase the friction between the hand and the rotating sleeve 31. The inner wall of the rotating sleeve 31 is fixedly connected to the outer walls of multiple rotating rods 32. Each rotating rod 32 has a curved abutment plate 34 fixedly connected to its end away from the arc-shaped limit rod 33. Each curved abutment plate 34 has an insert block 35 fixedly connected to its end away from the rotating rod 32. Both the insert block 35 and the piercing head 135 have tapered tips at one end. The tapered tips of the insert block 35 facilitate insertion into the retaining hole 134. The tapered tips of the piercing head 135 reduce the effort required to insert the gun head body 2. The rotating rod 133 has a retaining hole 134 formed on it, which, upon insertion of the insert block 35, drives the piercing head 135 back into the rotating groove 131.

[0032] The operating principle of this embodiment is as follows: When the pipette tip mechanism is needed, the end of the pipette tip body 2, away from the flat head 21, is inserted into one end of the pipette tip connecting tube 13 and secured. The inner wall of the pipette tip body 2 then abuts against the plurality of rotating rods 133, causing the rotating rods 133 to retract the attached piercing tip 135 into the rotating groove 131. If the pipette tip release button 11 is accidentally pressed or the pipette tip body 2 is not securely attached to the pipette tip connecting tube 13, the pipette tip body 2 may be dislodged from the bottom of the pipette tip connecting tube 13. When the pipette tip body 2 is dislodged from the bottom of the pipette tip connecting tube 13, the elastic force of the return spring 136 causes the rotating rods 133 to push the piercing tip 135 back into the pipette tip body 2, puncturing the pipette tip 2. At this point, the pipette tip body 2 can be removed from the end of the pipette tip connecting tube 13 without the aid of actuating mechanisms, other than by force. To remove the gun tip body 2 from the bottom of the gun tip connecting tube 13 using the actuating mechanism, simply rotate the rotating sleeve 31, causing the multiple rotating rods 32 to rotate simultaneously. These rods 32 drive the curved stop rods 33 to slide along the stop slots 37. Simultaneously, the corresponding curved stop plates 34 and the inserts 35 on these plates 34 are inserted into the retaining holes 134 on the rotating rods 133. Once the inserts 35 are fully inserted into the retaining holes 134, the rotating rods 133 drive the corresponding piercing tips 135 to break through the gun tip body 2 and retract into the rotating slots 131. Finally, the gun tip release button 11 is pressed, causing the stop tubes 12 to slide along the gun tip connecting tube 13 toward the gun tip body 2. The stop tubes 12 drive the curved stop rods 14 to remove the gun tip body 2 from the bottom of the gun tip connecting tube 13. The flat head 21 at one end of the gun tip body 2 provides a larger contact area during purging, making it easier for liquid to be completely discharged, thereby improving purging efficiency. At the same time, it can also reduce the shear force on cells, reduce cell damage, and thus reduce the impact on cells.

[0033] The preferred embodiments of the present invention described above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pipette tip mechanism, comprising a pipette body (1) and a tip body (2) movably mounted on one end of the pipette body (1), wherein the pipette body (1) is provided with a tip release button (11) and a stop tube (12), characterized in that: Also includes: A flat head (21) is arranged at an end of the gun head body (2) away from the abutment tube (12); A gun head connecting tube (13) is installed in the abutting tube (12) and connected to the end of the gun head body (2) away from the flat head (21); the end of the gun head connecting tube (13) away from the abutting tube (12) is provided with a barb mechanism for preventing the gun head body (2) installed on the gun head connecting tube (13) from falling off; The actuating mechanism is sleeved on the gun head connecting tube (13) and is manually rotated to close the barb mechanism.

2. A pipette tip mechanism according to claim 1, characterized in that: The barbed mechanism comprises a rotating groove (131) provided on one end of the gun head connecting tube (13) close to the gun head body (2); a plurality of rotating seats (132) distributed in a circumferential array are fixedly connected to the interior of the rotating groove (131); the rotating seats (132) are all rotatably connected to a rotating rod (133); the end of the rotating rod (133) away from the rotating seat (132) is fixedly connected to a thorn tube head (135); the inner wall of the rotating groove (131) is fixedly connected to a plurality of return springs (136) distributed in a circumferential array and corresponding to the return springs (133); the ends of the return springs (136) away from the inner wall of the rotating groove (131) are all fixedly connected to the corresponding return springs (133).

3. A pipette tip mechanism according to claim 2, characterized in that: One end of the rotating rod (133) close to the piercing tube head (135) is inclined toward the inner wall of the gun head body (2), and the piercing tube head (135) is inserted into the gun head body (2).

4. A pipette tip mechanism according to claim 2, characterized in that: The abutting mechanism comprises a plurality of rotating grooves (3) arranged in a circumferential array on the gun head connecting tube (13) and connected to the rotating groove (131); the rotating groove (3) is provided with a mutually connected limiting sliding groove (37); the limiting sliding groove (37) is slidably connected to an arc-shaped limiting rod (33); the opposite ends of the arc-shaped limiting rod (33) are fixedly connected to the second rotating rod (32); the end of the second rotating rod (32) away from the arc-shaped limiting rod (33) is fixedly connected to an arc-shaped abutting plate (34); the end of the arc-shaped abutting plate (34) away from the second rotating rod (32) is fixedly connected to an insert block (35); the first rotating rod (133) is provided with a clamping hole (134) which drives the puncture head (135) to retract into the rotating groove (131) after the insert block (35) is inserted.

5. A pipette tip mechanism according to claim 4, characterized in that: One end of the insert block (35) and the puncture tube head (135) are both provided with a tapered tip.

6. A pipette tip mechanism according to claim 4, characterized in that: A rotating sleeve (31) is provided on the movable sleeve of the gun head connecting tube (13), and the inner wall of the rotating sleeve (31) is fixedly connected to the outer wall of the plurality of rotating rods (32).

7. A pipette tip mechanism according to claim 6, characterized in that: The outer wall of the rotating sleeve (31) is fixedly connected with a plurality of strip-shaped convex patterns (36) distributed in a circumferential array.

8. A pipette tip mechanism according to claim 5, characterized in that: The abutment tube (12) is close to the rotating sleeve One end of (31) is fixedly connected to an arc-shaped supporting rod (14) for supporting the gun head body (2) to separate from the gun head connecting tube (13).

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