Pipettor suction head and pipettor

Abstract

The utility model belongs to the technical field of medical instruments, and discloses a pipettor suction head and a pipettor. The pipettor suction head comprises a first connecting sleeve, a suction pipe, a second connecting pipe and an adjusting assembly. The first connecting sleeve is hermetically connected with a pipetting head of the pipettor; the suction pipe is provided with a liquid suction end for sucking liquid; one end of the second connecting sleeve is hermetically connected with the straw; the adjusting assembly is arranged at the other end of the second connecting sleeve and connected with the end, away from the pipettor, of the first connecting sleeve, the adjusting assembly comprises a plurality of adjusting sleeves connected in sequence, and at least part of the adjusting sleeves can be unfolded in sequence to adjust the distance between a pipetting head of the pipettor and the suction pipe. When the pipettor suction head is used, the length of the pipettor suction head can be adjusted through the adjusting assembly, the adjusting method is simple and reliable, the complexity of operation in the liquid taking process can be reduced, and the possibility of polluting the pipettor can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a pipette tip and a pipette. Background Art

[0002] In many fields such as life sciences, chemical analysis, and clinical diagnosis, pipettes are an indispensable laboratory tool and are widely used for the precise pipetting and dispensing of liquid samples.

[0003] In the prior art, pipettes are often equipped with fixed-length pipette tips, which are difficult to effectively contact with samples during use. For example, when facing sample containers of different heights, fixed-length pipette tips may not be able to accurately reach below the sample liquid surface, and thus fail to absorb enough sample volume. They may also contact the container wall and contaminate the container. Although pipette tips of different lengths can be replaced to adapt to different sample containers and operating requirements, this not only increases the complexity of the operation, but also easily contaminates the pipette.

[0004] Therefore, it is urgent to invent a pipette tip and a pipette to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a pipette tip and a pipette, which solves the problem in the prior art that a fixed-length pipette tip is difficult to ensure reliable contact with a sample, resulting in large errors in pipetting and easy contamination of the container wall. At the same time, it also solves the problem of increased operational complexity, increased costs, and wasted time caused by replacing pipette tips of different lengths for pipetting.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the present application provides a pipette tip, comprising:

[0008] A first connecting sleeve, used for sealing connection with the pipetting head of the pipette;

[0009] a pipette having a pipette end for aspirating liquid;

[0010] A second connecting sleeve, one end of which is sealed and connected to the straw;

[0011] An adjustment component is arranged at the other end of the second connecting sleeve and connected to the end of the first connecting sleeve away from the pipette. The adjustment component includes a plurality of adjustment sleeves connected in sequence, and at least some of the adjustment sleeves can be unfolded in sequence to adjust the distance between the pipette head of the pipette and the pipette.

[0012] Optionally, the outer diameters of the plurality of adjustment sleeves decrease gradually along the direction of gas flow, so that the plurality of adjustment sleeves can be sequentially sleeved.

[0013] Optionally, each of the adjustment sleeves is provided with a sealing portion, and the sealing portion is tightly pressed against the outer wall of the adjacent adjustment sleeve.

[0014] Optionally, the sealing portion is arranged on an end surface of the adjusting sleeve.

[0015] Optionally, the outer diameters of the plurality of adjustment sleeves are equal, and a deployable folding portion is provided in the middle of each adjustment sleeve.

[0016] Optionally, two adjacent adjustment sleeves are threadedly connected.

[0017] Optionally, when unfolded, the side wall of the folded portion is flush with the side wall of the adjustment sleeve, and when folded, the opposite side walls of the folded portion fit each other.

[0018] Optionally, the first connecting sleeve is threadably connected to the pipetting head of the pipette.

[0019] Optionally, the second connecting sleeve is inserted into the straw and threadably connected to the straw.

[0020] In a second aspect, the present application also provides a pipette, which comprises:

[0021] casing;

[0022] A pipetting head, arranged at the liquid inlet end of the cannula;

[0023] And, the pipette tip as described in any one of the first aspects is arranged on the pipetting head.

[0024] Beneficial effects of the utility model:

[0025] In the first aspect, through the first connecting sleeve and the second connecting sleeve, a sealed connection can be formed with the pipette head and the straw respectively. When the spacing between the straw and the pipette head needs to be adjusted, part of the adjusting sleeve can be unfolded to increase the length of the adjusting assembly, and the spacing between the pipette head and the straw can be changed accordingly. The length of the specific adjusting assembly can be determined according to the spacing between the pipette head and the straw when the pipette end can form a complete contact with the sample. In this way, when the pipette tip is in use, the length of the straw can be flexibly adjusted according to the height of the actual sample container, ensuring that the pipette end can accurately reach the specified depth below the sample liquid level to absorb a sufficient amount of sample, and at the same time, it can also avoid the situation where the pipette end contacts the sample container and contaminates the container. Moreover, the adjustment of the length of the pipette tip can be achieved by adjusting the assembly, and can be flexibly adjusted within a certain length range. The adjustment method is simple and reliable, which is conducive to reducing the complexity of operation during the liquid collection process and can reduce the possibility of contaminating the pipette.

[0026] Secondly, when the pipette is in use, the length of the pipette tip can be flexibly adjusted to adapt to different sample containers, ensuring that the pipette tip can penetrate into the specified depth of the sample and smoothly absorb a sufficient amount of sample. Moreover, the length can be flexibly adjusted only by operating the adjustment component. The adjustment method is simple and reliable, which is conducive to reducing the complexity of the operation during the liquid collection process and can reduce the possibility of contaminating the pipette. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the pipette tip in the first embodiment of the utility model;

[0028] Figure 2 It is a schematic structural diagram of two adjustment sleeves in the adjustment assembly of the pipette tip in the first embodiment of the utility model after they are unfolded;

[0029] Figure 3 It is a schematic diagram of the structure after three adjustment sleeves in the adjustment assembly of the pipette tip in the first embodiment of the utility model are unfolded;

[0030] Figure 4 It is a structural schematic diagram of the pipette in the first embodiment of the utility model;

[0031] Figure 5 It is a structural schematic diagram of the folding parts of the multiple adjustment sleeves of the pipette tip in the second embodiment of the utility model from being fully folded to being fully unfolded.

[0032] In the figure:

[0033] 1. First connecting sleeve; 2. Straw; 3. Second connecting sleeve; 4. Adjusting sleeve; 41. Folding part; 42. Upper adjusting part; 43. Lower adjusting part; 5. Sleeve; 6. Pipetting head. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0035] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0037] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0038] This embodiment discloses a pipette tip and a pipette.

[0039] Embodiment 1:

[0040] Reference Figures 1 to 3 The pipette tip comprises a first connection sleeve 1, a pipette 2, a second connection sleeve 3 and an adjustment assembly. The first connection sleeve 1 is used for sealing connection with the pipette tip of the pipette; the pipette 2 has a pipette end for pipetting liquid; one end of the second connection sleeve 3 is sealed connected with the pipette 2; the adjustment assembly is arranged at the other end of the second connection sleeve 3 and connected with the end of the first connection sleeve 1 away from the pipette, and the adjustment assembly comprises a plurality of adjustment sleeves 4 connected in sequence, and at least some of the adjustment sleeves 4 can be unfolded in sequence to adjust the distance between the pipette tip of the pipette and the pipette 2.

[0041] Specifically, the first connecting sleeve 1 and the pipette head can be plugged in and matched, and the connection between the two can be sealed by a sealing ring or other structures, or by directly forming a threaded connection between the two to achieve a sealed connection. Similarly, the second connecting sleeve 3 and the straw 2 can also be plugged in and matched, and the sealed connection can also be achieved by providing a sealing ring or a threaded connection between the two. In this embodiment, the pipette head is plugged into the first connecting sleeve 1 and the two are threadedly connected, and the second connecting sleeve 3 is plugged into the straw 2 and the two are threadedly connected to ensure good overall air tightness.

[0042] The adjustment assembly is arranged between the first connection sleeve 1 and the second connection sleeve 3. The three can be an integrated structure or a split structure, and are fixed together by bonding or threading to ensure good air tightness. Multiple adjustment sleeves 4 can be connected in sequence, and each adjustment sleeve 4 can be provided with a portion that can be unfolded or folded to achieve that at least part of the adjustment sleeve 4 can be unfolded in sequence. It should be understood that the above two means can also be combined together to further increase the adjustable range.

[0043] Through the first connecting sleeve 1 and the second connecting sleeve 3, a sealed connection can be formed with the pipette head and the pipette 2 respectively. When the spacing between the pipette 2 and the pipette head needs to be adjusted, the part of the adjusting sleeve 4 can be unfolded to increase the length of the adjusting assembly, and the spacing between the pipette head and the pipette 2 can be changed accordingly. The length of the specific adjusting assembly can be determined according to the spacing between the pipette head and the pipette 2 that needs to be satisfied when the pipette end of the pipette 2 can form a complete contact with the sample. In this way, when the pipette tip is in use, the length of the pipette 2 can be flexibly adjusted according to the height of the actual sample container, ensuring that the pipette end can accurately reach the specified depth below the sample liquid level to absorb a sufficient amount of sample, and at the same time, it can also avoid the situation where the pipette end contacts the sample container and contaminates the container. Moreover, the adjustment of the length of the pipette tip can be achieved by adjusting the assembly, and it can be flexibly adjusted within a certain length range. The adjustment method is simple and reliable, which is conducive to reducing the complexity of the operation during the liquid collection process, and can reduce the possibility of contaminating the pipette.

[0044] Optionally, the outer diameters of the plurality of adjustment sleeves 4 decrease gradually along the direction of gas flow, so that the plurality of adjustment sleeves 4 can be sleeved in sequence.

[0045] Specifically, there is an airway for gas circulation in the adjustment sleeve 4, and the airway is connected to the sleeve of the pipette to extract the gas in the pipette 2 and draw in the sample liquid. A filter element is arranged inside the pipette 2 to prevent the sample liquid from flowing into the adjustment sleeve 4. The outer diameter of the adjustment sleeve 4 close to the second connecting sleeve 3 is the largest, and the outer diameters of the remaining adjustment sleeves 4 decrease successively along the flow direction of the gas, so that a socket connection can be formed between adjacent adjustment sleeves 4. The inner wall of the adjustment sleeve 4 and the outer wall of the adjacent adjustment sleeve 4 can be matched with the slide groove and the slider, which can ensure that the adjustment sleeve 4 will not be offset when sliding, and on the other hand, the relative sliding distance of the two adjustment sleeves 4 can be limited to ensure that the two adjustment sleeves 4 will not be separated. It should be understood that the specific matching structure can be designed according to the actual production difficulty and use requirements, and this application does not limit this.

[0046] By sequentially connecting multiple adjustment sleeves 4, when the adjustment assembly is in the shortest state, the adjustment sleeve 4 directly connected to the second connecting sleeve 3 can accommodate all the adjustment sleeves 4, and the innermost adjustment sleeve 4 is fixedly connected to the first connecting sleeve 1. When the adjustment assembly is lengthened, the multiple adjustment sleeves 4 are sequentially pulled out and unfolded, and the specific number of adjustment sleeves 4 pulled out can be determined according to the actual required length of the adjustment assembly.

[0047] In order to facilitate the calculation of the length of the adjustment component, the height of each adjustment sleeve 4 can be completely equal, or the heights of multiple adjustment sleeves 4 can be decreasing along a specific direction. A special length scale and other structures can be set for each adjustment sleeve 4, so that when a specific number of adjustment sleeves 4 are unfolded, the length of the corresponding adjustment component can be quickly calculated.

[0048] Only two positions can be set between two adjacent adjustment sleeves 4, namely, the fully extended state and the fully sleeved state, and other positions can also be set, such as the half extended state, so that the length that the entire adjustment component can reach when extended is more flexible, so as to further adapt to different application scenarios. The specific means of realizing other position states can be to set a card-type structure at the corresponding position state, or other means, which can be specifically designed according to the actual installation space, and this application does not limit this.

[0049] Optionally, each adjustment sleeve 4 is provided with a sealing portion (not shown in the figure), and the sealing portion is tightly pressed against the outer wall of the adjacent adjustment sleeve 4 .

[0050] Specifically, the sealing part can be a sealing ring made of rubber, which has a certain elasticity, and the outer side of the sealing part is fixed on the corresponding adjustment sleeve 4, and the inner side thereof can be sealed and fitted with the outer side wall of the adjacent adjustment sleeve 4. The sealing ring can be arranged inside the adjustment sleeve 4, or on the end face of the adjustment sleeve 4. This application does not limit this.

[0051] By providing the sealing portion, while ensuring that two adjacent adjustment sleeves 4 can slide relative to each other, the gap between the two adjacent adjustment sleeves 4 can also be effectively blocked, thereby ensuring good air tightness of the entire adjustment assembly.

[0052] Optionally, the sealing portion is arranged on the end surface of the adjusting sleeve 4 .

[0053] Specifically, an annular groove is provided on the end surface of the adjustment sleeve 4 and close to the inner wall, and the sealing part is embedded in the groove, and part of the sealing part extends out of the groove to form a sealing fit with the outer wall of the adjacent adjustment sleeve 4. The sealing part can be bonded in the groove, or fixed in the groove by other structures.

[0054] By arranging the sealing part on the end surface of the adjusting sleeve 4, the stability of the sealing part can be detected in real time to ensure that the sealing part can maintain good air tightness of the entire adjusting assembly during the sliding process of the adjusting sleeve 4. At the same time, it is also convenient to reinforce the loose sealing part in time to ensure a stable sealing effect.

[0055] Reference Figure 4 The pipette comprises a sleeve 5, a pipette head 6 and a pipette tip as described above. The pipette head 6 is arranged at the liquid inlet end of the sleeve 5; and the pipette tip is arranged at the pipette head 6.

[0056] When the pipette is in use, the length of the pipette tip can be flexibly adjusted to adapt to different sample containers, ensuring that the pipette tip can penetrate into the specified depth of the sample and smoothly absorb a sufficient amount of sample. Moreover, the length can be flexibly adjusted only by operating the adjustment component. The adjustment method is simple and reliable, which is conducive to reducing the complexity of the operation during the liquid collection process and can reduce the possibility of contaminating the pipette.

[0057] Embodiment 2:

[0058] The difference between this embodiment and the first embodiment lies in the deployment method of the adjustment component.

[0059] Reference Figure 5 Optionally, the outer diameters of the plurality of adjustment sleeves 4 are equal, and a deployable folding portion 41 is provided in the middle of each adjustment sleeve 4 .

[0060] Specifically, the adjustment sleeve 4 includes an upper adjustment portion 42 and a lower adjustment portion 43, and a corrugated folding portion 41 is arranged between the upper adjustment portion 42 and the lower adjustment portion 43. The three can be in an integrated structure or fixed together by bonding or the like. The folding portion 41 can be unfolded to increase the distance between the upper adjustment portion 42 and the lower adjustment portion 43, or it can be folded to reduce the distance between the upper adjustment portion 42 and the lower adjustment portion 43. The outer diameters of the multiple adjustment sleeves 4 are the same, which can reduce the difficulty of processing the adjustment sleeves 4, thereby reducing the manufacturing cost of the adjustment sleeves 4, and the multiple adjustment sleeves 4 are also easy to align and form a connection.

[0061] By providing the folding portion 41 on each adjusting sleeve 4, the length of each adjusting sleeve 4 can be adjusted, so that the overall length change of the adjusting assembly can be more flexible, which is beneficial to improving the ability of the pipette tip to adapt to different application scenarios.

[0062] Optionally, two adjacent adjustment sleeves 4 are threadedly connected.

[0063] Specifically, two adjacent adjustment sleeves 4 are detachably connected by threaded connection, so as to flexibly change the number of adjustment sleeves 4 included in the adjustment assembly. Meanwhile, the threaded connection can also ensure that the two adjacent adjustment sleeves 4 maintain good air tightness.

[0064] Optionally, when unfolded, the side wall of the folded portion 41 is flush with the side wall of the adjustment sleeve 4 , and when folded, the opposite side walls of the folded portion 41 are in contact with each other.

[0065] Specifically, when the folding portion 41 is unfolded to increase the length of the adjustment assembly, the inner side wall of the folding portion 41 is flush with the inner side wall of the adjustment sleeve 4, so that when unfolded, the gas can flow smoothly. When folded, the opposite side walls of the folding portion 41 fit each other, so that the bending position of the folding portion 41 is completely closed, thereby reducing the possibility of gas flowing into the bending position of the folding portion 41 when flowing through the folding portion 41. This helps to reduce the possibility of the folding portion 41 interfering with the flow of gas.

[0066] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pipette tip, characterized in that: include: A first connecting sleeve (1) is used for sealingly connecting to a pipetting head (6) of a pipette; A pipette (2) having a liquid aspiration end for aspirating liquid; A second connecting sleeve (3), one end of which is sealedly connected to the straw (2); An adjustment component is arranged at the other end of the second connecting sleeve (3) and connected to the end of the first connecting sleeve (1) away from the pipette, and the adjustment component includes a plurality of adjustment sleeves (4) connected in sequence, and at least some of the adjustment sleeves (4) can be unfolded in sequence to adjust the distance between the pipette head (6) of the pipette and the pipette (2).

2. The pipette tip according to claim 1, characterized in that The outer diameters of the plurality of adjustment sleeves (4) decrease gradually along the direction of gas flow, so that the plurality of adjustment sleeves (4) can be sleeved in sequence.

3. The pipette tip according to claim 2, characterized in that: Each of the adjustment sleeves (4) is provided with a sealing portion, and the sealing portion is tightly pressed against the outer wall of the adjacent adjustment sleeve (4).

4. The pipette tip according to claim 3, characterized in that: The sealing portion is arranged on the end surface of the adjusting sleeve (4).

5. The pipette tip according to claim 1, characterized in that: The outer diameters of the plurality of adjustment sleeves (4) are equal, and a deployable folding portion (41) is provided in the middle of each adjustment sleeve (4).

6. The pipette tip according to claim 5, characterized in that: Two adjacent adjustment sleeves (4) are threadedly connected.

7. The pipette tip according to claim 5, characterized in that: When unfolded, the side wall of the folded portion (41) is flush with the side wall of the adjustment sleeve (4); when folded, the opposite side walls of the folded portion (41) are in contact with each other.

8. The pipette tip according to any one of claims 1 to 7, characterized in that The first connecting sleeve (1) is threadedly connected to the pipetting head (6) of the pipette.

9. The pipette tip according to any one of claims 1 to 7, characterized in that The second connecting sleeve (3) is inserted into the suction tube (2) and is threadably connected to the suction tube (2).

10. A pipette, characterized in that include: Casing (5); A pipetting head (6) is arranged at the liquid inlet end of the sleeve (5); And, the pipette tip according to any one of claims 1 to 9 is arranged on the pipetting head (6).

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