Pipetting device and experimental equipment

Abstract

The utility model discloses a pipetting device and experimental equipment. The pipetting device comprises a driving assembly, a first clamping mechanism, a second clamping mechanism and at least one floating mechanism, the first clamping mechanism is connected with the driving assembly and used for forming a first clamping position, and the first clamping position is used for clamping a suction head; the second clamping mechanism is connected with the driving assembly and used for forming a second clamping position, and the second clamping position is used for clamping the piston rod; the floating mechanisms are connected with the driving assembly, the first clamping mechanism is in floating connection with one floating mechanism, and / or the second clamping mechanism is in floating connection with one floating mechanism; the driving assembly is used for driving the first clamping mechanism and the second clamping mechanism to clamp the suction head and the piston rod correspondingly. The driving assembly is further used for driving the second clamping mechanism to move so that the piston rod can move relative to the suction head. The floating mechanism is used for moving in the first direction so that the center of the first clamping position and the center of the second clamping position can directly face each other in the axial direction of the suction head. The pipetting device is high in pipetting precision and pipetting efficiency.

Description

pipetting apparatus and experimental equipment Technical Field

[0001] This utility model relates to the field of pipetting technology, specifically to a pipetting device and experimental equipment. Background Technology

[0002] External piston pipettes are a common liquid transfer tool that comes into direct contact with the liquid during use. The volume of the liquid is controlled by the up-and-down movement of the piston rod, avoiding interference from air cushions. They are particularly suitable for applications involving high-viscosity liquids (such as glycerin) or volatile liquids (such as organic solvents). They are typically for single use to prevent cross-contamination. Currently, most applications involve manual hand-held external piston pipettes, where users visually observe the volume transferred, making it difficult to guarantee accuracy and resulting in low efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a pipetting device and experimental equipment to solve the problems of low pipetting accuracy and efficiency in existing pipetting devices.

[0004] To achieve the objectives of this utility model, the following technical solution is provided:

[0005] In a first aspect, this utility model provides a pipetting device for holding a liquid aspiration mechanism, the liquid aspiration mechanism including a piston rod and a pipette tip, one end of the piston rod extending into the pipette tip and the other end protruding from the pipette tip, comprising:

[0006] Driver components;

[0007] A first clamping mechanism is connected to the drive assembly and is used to form a first clamping position for clamping the suction head;

[0008] The second clamping mechanism is connected to the drive assembly and is used to form a second clamping position for clamping the piston rod.

[0009] At least one floating mechanism is connected to the drive assembly, the first clamping mechanism is floatingly connected to one of the floating mechanisms, and / or the second clamping mechanism is floatingly connected to one of the floating mechanisms;

[0010] The driving assembly is used to drive the first clamping mechanism and the second clamping mechanism to move along a first direction to clamp the suction head and the piston rod respectively; the driving assembly is also used to drive the second clamping mechanism to move relative to the first clamping mechanism along a second direction so that the piston rod moves relative to the suction head; the floating mechanism is used to move in the first direction so that the center of the first clamping position and the center of the second clamping position are aligned in the axial direction of the suction head, and the first direction intersects the second direction.

[0011] In one embodiment, the floating mechanism includes at least one set of centering members, each centering member including an elastic element for elastic deformation along the first direction. One end of the elastic element elastically abuts against the first clamping mechanism or the second clamping mechanism, and the other end of the elastic element elastically abuts against the drive assembly.

[0012] In one embodiment, the centering member further includes a connecting rod extending along the first direction. One end of the connecting rod is fixedly connected to one of the corresponding clamping mechanism and the driving assembly, and the other end of the connecting rod is movably connected to the other of the corresponding clamping mechanism and the driving assembly. The elastic element is sleeved on the connecting rod.

[0013] In one embodiment, the first clamping mechanism includes at least two first clamping members, each of the first clamping members being used to jointly form the first clamping position, and the driving component being used to drive each of the first clamping members to move along the first direction to clamp or release the suction head.

[0014] The second clamping mechanism includes at least two second clamping members, each of which is used to jointly form the second clamping position. The driving assembly is used to drive each of the second clamping members to move along the first direction to clamp or release the piston rod.

[0015] In one embodiment, the piston rod includes a rod body and a locking connector, the rod body portion extending into the suction head, the locking connector protruding from the suction head, and the locking connector being connected to the rod body and protruding from the outer peripheral surface of the rod body;

[0016] The second clamping member has a clamping surface on the side facing the second clamping position. The second clamping member also includes a protrusion, which protrudes from the clamping surface and faces the second clamping position. The protrusion is used to abut against the snap-fit ​​connector when the rod is clamped on the clamping surface.

[0017] In one embodiment, the driving component includes a first driving mechanism and a second driving mechanism, wherein the first driving mechanism is used to drive the first clamping mechanism and the second clamping mechanism to move in the first direction, and the second driving mechanism is used to drive the second clamping mechanism to move in the second direction.

[0018] The first driving mechanism is connected to the first clamping mechanism or the floating mechanism corresponding to the first clamping mechanism, and the first driving mechanism is also movably connected to the second driving mechanism or the second clamping mechanism or the floating mechanism corresponding to the second clamping mechanism; the second driving mechanism is connected to the second clamping mechanism or the floating mechanism corresponding to the second clamping mechanism.

[0019] In one embodiment, the first clamping mechanism includes two first clamping members, and the second clamping mechanism includes two second clamping members;

[0020] The first driving mechanism includes a first driving member, two first connecting members disposed opposite to each other, and two guide rods. The first driving member is connected to the two first connecting members. The first connecting members are respectively disposed with the first clamping members and the first clamping members are located between the two first connecting members. The guide rods are respectively connected and fixed to the first connecting members and extend along the second direction. The first driving member is used to drive the two first connecting members to move closer or further away from each other along the first direction, so as to synchronously drive the two first clamping members and the two guide rods to move along the first direction.

[0021] The second driving mechanism includes a second driving member and two second connecting members. The second driving member is connected to the two second connecting members. The second connecting members are slidably connected to the guide rods in a corresponding manner along the second direction. The second connecting members are also correspondingly arranged with the second clamping members, and the second clamping members are located between the two second connecting members. The second driving member is used to drive the two second connecting members to move along the second direction on the corresponding guide rods, so as to synchronously drive the two second clamping members to move along the second direction.

[0022] In one embodiment, a floating mechanism is provided, and the floating mechanism is connected to the second clamping mechanism; the floating mechanism includes two sets of aligning members, each of which is respectively connected to the second connecting member and the second clamping member; each aligning member includes an elastic member and a connecting rod, the connecting rod extends along the first direction, the elastic member is sleeved on the connecting rod, one end of the elastic member elastically abuts against the second clamping member, the other end of the elastic member elastically abuts against the second connecting member, one end of the connecting rod is fixedly connected to one of the second connecting member and the second clamping member, and the other end of the connecting rod is movably connected to the other of the second connecting member and the second clamping member;

[0023] Alternatively, two floating mechanisms may be provided, one of which is connected to the second clamping mechanism, and the other is connected to the first clamping mechanism. Each floating mechanism includes a set of centering components. The centering component corresponding to the second clamping mechanism is connected to a second connector and a second clamping component corresponding to the second connector, respectively. The centering component corresponding to the first clamping mechanism is connected to a first connector and a first clamping component corresponding to the first connector, respectively. The two sets of centering components are arranged opposite to each other in the first direction.

[0024] In one embodiment, the first driving mechanism further includes a first transmission structure, through which the first driving member drives the first connecting member to move along the first direction;

[0025] The second drive mechanism further includes a second transmission structure, through which the second drive member drives the second connecting member to move along the second direction.

[0026] In one embodiment, the second transmission structure includes a first slide rail, a second slide rail, and a transmission member. The first slide rail extends along a first direction, the second slide rail extends along a second direction, the second connecting member is slidably connected to the first slide rail, the first slide rail is slidably connected to the second slide rail, and the second driving member drives the first slide rail to move relative to the second slide rail along the second direction through the transmission member.

[0027] In one embodiment, the first connector includes a first connecting portion and a second connecting portion, the first connecting portion extending along a second direction, the second connecting portion extending along a third direction, the first clamping mechanism being disposed at the end of the second connecting portion in the first direction, the end of the first connecting portion away from the second connecting portion being connected to the first transmission structure, and the end of the second connecting portion away from the first connecting portion being connected and fixed to the guide rod, wherein the first direction, the second direction and the third direction intersect each other.

[0028] In one embodiment, the second connector includes a third connecting portion and a fourth connecting portion connected together. The end of the third connecting portion away from the fourth connecting portion is slidably connected to the first slide rail, and the end of the fourth connecting portion in the first direction is connected to the second clamping mechanism or a floating mechanism corresponding to the second clamping mechanism.

[0029] The fourth connecting part has a through hole that extends through itself in the second direction, the guide rod passes through the through hole, and the fourth connecting part is slidably connected to the guide rod.

[0030] In one embodiment, the pipetting device further includes an adapter for connecting to a transport device.

[0031] Secondly, this utility model provides an experimental device, including a liquid aspiration mechanism and a pipetting device as described in any of the various embodiments of the first aspect. The liquid aspiration mechanism includes a piston rod and a pipette tip. One end of the piston rod extends into the pipette tip, and the other end protrudes from the pipette tip. The pipetting device is used to clamp the piston rod and the pipette tip, and drive the piston rod to move relative to the pipette tip in the second direction.

[0032] In one embodiment, the experimental apparatus further includes a transport device connected to the pipette, the transport device being used to move the pipette.

[0033] This utility model's pipetting device, through the inclusion of a drive assembly, a first clamping mechanism, and a second clamping mechanism, achieves automatic clamping and fixing of the pipette tip and piston rod within the aspiration mechanism, as well as the movement of the piston rod relative to the pipette tip, thereby enabling the pick-up and placement of liquids and pipetting operations. The drive assembly precisely controls the movement of the piston rod, achieving high-precision automated pipetting operations. Simultaneously, the floating mechanism ensures that the piston rod remains axially aligned with the pipette tip during movement, guaranteeing pipetting accuracy, consistency, and airtightness within the aspiration mechanism. This reduces manual intervention, avoids human error, and improves production efficiency and automation. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 is a perspective view of a pipetting device according to an embodiment;

[0036] Figure 2 is a front view of a pipetting device according to an embodiment;

[0037] Figure 3 is a perspective view of a partial structure of a pipetting device according to an embodiment;

[0038] Figure 4 is a cross-sectional view of the structure shown in Figure 3;

[0039] Figure 5 is a perspective view of a liquid suction mechanism according to one embodiment.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100-Pipette device, 10-Drive assembly, 11-First drive mechanism, 111-First drive component, 112-First connector, 1121-First connecting part, 1122-Second connecting part, 113-Guide rod, 114-First transmission structure;

[0042] 12-Second drive mechanism, 121-Second drive component, 122-Second connecting component, 1221-Third connecting part, 1222-Fourth connecting part, 1223-Through hole, 1224-Fourth groove, 123-Second transmission structure, 1231-First slide rail, 1232-Second slide rail, 1233-Transmission component, 1234-Transmission nut, 1235-Lead screw;

[0043] 20-First clamping mechanism, 21-First clamping member, 211-First clamping groove, 212-First part, 213-Second part, 214-Third part, 22-First clamping position;

[0044] 30-Second clamping mechanism, 31-Second clamping member, 311-Clamping surface, 312-Protrusion, 313-Second clamping groove, 314-Fourth part, 3141-Third groove, 315-Fifth part, 32-Second clamping position;

[0045] 40-Floating mechanism, 41-Elastic element, 42-Connecting rod, 50-Adapter, 60-Housing shell;

[0046] 200-Liquid suction mechanism, 210-Piston rod, 201-Snap-fit ​​connector, 202-Snap-fit ​​groove, 203-Rod body, 220-Suction tip;

[0047] X - First direction, Z - Second direction, Y - Third direction. Detailed Implementation

[0048] 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 a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0050] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this invention includes any and all combinations of one or more of the associated listed items.

[0051] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0052] Referring to Figures 1 and 5, this utility model provides a pipetting device 100 for holding a suction mechanism 200. The suction mechanism 200 includes a piston rod 210 and a pipette tip 220. One end of the piston rod 210 extends into the pipette tip 220, and the other end protrudes from the pipette tip 220. The pipetting device 100 includes a drive assembly 10, a first clamping mechanism 20, a second clamping mechanism 30, and at least one floating mechanism 40. The first clamping mechanism 20 is connected to the drive assembly 10 and forms a first clamping position 22 for clamping the pipette tip 220. The second clamping mechanism 30 is connected to the drive assembly 10 and forms a second clamping position 32 for clamping the piston rod 210. At least one floating mechanism 40 is connected to the drive assembly 10, and the first clamping mechanism 20 is floatingly connected to a floating mechanism 40, and / or the second clamping mechanism 30 is floatingly connected to a floating mechanism 40. The drive assembly 10 is used to drive the first clamping mechanism 20 and the second clamping mechanism 30 to move along the first direction X to clamp the suction head 220 and the piston rod 210 respectively; the drive assembly 10 is also used to drive the second clamping mechanism 30 to move relative to the first clamping mechanism 20 along the second direction Z so that the piston rod 210 moves relative to the suction head 220; the floating mechanism 40 is used to move in the first direction X so that the center of the first clamping position 22 and the center of the second clamping position 32 are aligned in the axial direction of the suction head 220, and the first direction X intersects the second direction Z.

[0053] Optionally, the first direction X is perpendicular to the second direction Z. Optionally, the pipetting device 100 is mounted on a mounting surface, which can be the ground, a tabletop, etc., without limitation. Correspondingly, the first direction X is parallel to the mounting surface, and the second direction Z is perpendicular to the mounting surface. Specifically, the second direction Z can be the direction of gravity. Optionally, the first direction X can be the radial direction of the pipette tip 220, and the second direction Z can be the axial direction of the pipette tip 220.

[0054] Optionally, the liquid suction mechanism 200 is an external piston liquid suction assembly, which achieves precise liquid suction and distribution through the mechanical movement of the piston rod 210. The liquid suction mechanism 200 can be a common structure currently available on the market, and there are no restrictions.

[0055] Optionally, the end of the pipette tip 220 away from the piston rod 210 is used to extend into the solution. The pipette tip 220 needs to cooperate with the piston rod 210 to achieve a seal and directly contact the working medium. Common materials for the pipette tip 220 include polytetrafluoroethylene, polyethylene, metal materials, ceramics, glass, etc., and there are no restrictions.

[0056] Optionally, the first clamping mechanism 20 may be provided with at least one floating mechanism 40, and the second clamping mechanism 30 may be provided with at least one floating mechanism 40. The floating mechanism 40 can be used to apply a certain pressure to the first clamping mechanism 20 and / or the second clamping mechanism 30 in the first direction X as the piston rod 210 moves away from the pipette tip 220, so that the piston rod 210 and the pipette tip 220 always remain coaxial, ensuring the airtightness inside the pipette tip 220, thereby improving the accuracy and consistency of the pipetting volume.

[0057] Optionally, the movement of the piston rod 210 can be precisely controlled by the drive assembly 10 to achieve high-precision pipetting operations.

[0058] Optionally, the floating mechanism 40 can also act as a buffer to prevent either the first clamping mechanism 20 or the second clamping mechanism 30 from being rigidly clamped to the suction head 220 or the piston rod 210 and causing damage.

[0059] Optionally, the first clamping mechanism 20 and the second clamping mechanism 30 can be a wedge clamping mechanism (using the inclined surface force of the wedge to achieve clamping), a cam clamping mechanism (generating clamping force by rotating the cam), a parallelogram mechanism (composed of two parallel jaws, achieving clamping or releasing through relative motion), a worm mechanism (achieving clamping through the helical motion of the worm and worm wheel), a clamping mechanism (clamping jaw design similar to pliers, achieving clamping through lever or linkage mechanism), an axisymmetric helical mechanism (helical jaws closely contact the object, achieving clamping through rotation), etc., without limitation.

[0060] The pipetting device 100 of this invention, by setting up a drive assembly 10, a first clamping mechanism 20, and a second clamping mechanism 30, realizes the automatic clamping and fixing of the pipette tip 220 and the piston rod 210 in the aspiration mechanism 200, as well as the movement of the piston rod 210 relative to the pipette tip 220, so as to realize the pick-up and pipetting operations of the aspiration mechanism 200. The drive assembly 10 precisely controls the movement of the piston rod 210, thereby realizing high-precision automated pipetting operations. At the same time, the floating mechanism 40 controls the piston rod 210 to always be directly aligned with the pipette tip 220 in the axial direction of the pipette tip 220 during the movement, ensuring the pipetting accuracy and consistency of the pipetting device 100 during use, as well as the airtightness of the aspiration mechanism 200, reducing manual intervention, avoiding human error, and improving production efficiency and automation.

[0061] Referring to Figures 1, 2 and 4, in one embodiment, the floating mechanism 40 includes at least one set of centering members, each of which includes an elastic member 41. The elastic member 41 is used to elastically deform along a first direction X. One end of the elastic member 41 elastically abuts against the first clamping mechanism 20 or the second clamping mechanism 30, and the other end of the elastic member 41 elastically abuts against the drive assembly 10.

[0062] Optionally, a set of centering components may include one or more centering components, and multiple centering components may be arranged in an array.

[0063] Optionally, the elastic element 41 can be a compression spring, rubber block, rubber sleeve, spring sheet, etc., without limitation. Optionally, a set of centering components may include multiple elastic elements 41, and the multiple elastic elements 41 are equally spaced, or the multiple elastic elements 41 are arranged in a circular array, so that when the multiple elastic elements 41 abut against the clamping mechanism, the clamping mechanism can be subjected to uniform force, thereby improving the centering accuracy and clamping stability.

[0064] An elastic element 41 is provided that can elastically deform along the first direction X, so that if the axis of the piston rod 210 and the axis of the suction head 220 do not coincide during the movement of the piston rod 210 relative to the suction head 220 along the second direction Z, the elastic element 41 elastically deforms in the first direction X to apply a certain pressure to the piston rod 210 and / or the suction head 220, thereby making the piston rod 210 and the suction head 220 coaxial.

[0065] Referring to Figures 1 to 4, in one embodiment, the concentric component further includes a connecting rod 42 extending along a first direction X. One end of the connecting rod 42 is fixedly connected to one of the corresponding clamping mechanism and the driving assembly 10, and the other end of the connecting rod 42 is movably connected to the other of the corresponding clamping mechanism and the driving assembly 10. An elastic member 41 is sleeved on the connecting rod 42. Here, the clamping mechanism is either a first clamping mechanism 20 or a second clamping mechanism 30 that elastically abuts against the elastic member 41.

[0066] Optionally, the connecting rod 42 can be made of a material with a certain structural strength, such as metal or high-strength plastic. Metal materials include titanium alloy, aluminum alloy, and stainless steel.

[0067] Optionally, the fixed connection method can be adhesive, welding, screwing, snap-fit, etc., without restriction. The movable connection method can be sliding connection, rotating connection, etc., without restriction.

[0068] Optionally, the number of connecting rods 42 and elastic elements 41 are equal, with one connecting rod 42 and one elastic element 41 forming a concentric component. Optionally, the elastic element 41 is a compression spring, which is wound around the connecting rod 42.

[0069] By providing a connecting rod 42 extending along the first direction X, a certain guiding effect is provided for the movement of the elastic member 41 in the first direction X. At the same time, it can also prevent the elastic member 41 from disengaging from the clamping mechanism and / or drive assembly 10 during the deformation process, thereby improving the connection strength and structural stability between the centering member and the clamping mechanism and / or drive assembly 10.

[0070] Referring to Figure 1, in one embodiment, the first clamping mechanism 20 includes at least two first clamping members 21, each of which is used to jointly form a first clamping position 22, and the driving component 10 is used to drive each of the first clamping members 21 to move along the first direction X to clamp or release the suction head 220.

[0071] The second clamping mechanism 30 includes at least two second clamping members 31, each second clamping member 31 is used to jointly form a second clamping position 32, and the drive assembly 10 is used to drive each second clamping member 31 to move along the first direction X to clamp or release the piston rod 210.

[0072] Optionally, the first clamping mechanism 20 includes at least two first clamping members 21. Specifically, when there are two first clamping members 21, the two first clamping members 21 are arranged opposite to each other; when there are three or more first clamping members 21, the multiple first clamping members 21 are arranged in an array with the center of the first clamping position 22 as the center. Wherein, when there are three or more first clamping members 21, the first direction X is the radial direction of the ring corresponding to the annular array of the first clamping members 21.

[0073] Optionally, there are four first clamping members 21, with two first clamping members 21 forming a group. The two first clamping members 21 in the same group are spaced apart in the third direction Y. The distance between the two first clamping members 21 in the two groups in the third direction Y can be kept consistent. The two first clamping members 21 in the same group can be regarded as a whole. The two groups of first clamping members 21 are arranged opposite each other in the first direction X. The driving component 10 can drive the two groups of first clamping members 21 to move towards or away from each other.

[0074] Optionally, the first clamping member 21 is columnar, and multiple columnar first clamping members 21 move relative to each other along the first direction X to form a first clamping position 22 to fix the suction head 220. Alternatively, the first clamping member 21 is block-shaped, and a first clamping groove 211 is formed on the surface of the first clamping member 21 in the first direction X. When multiple first clamping members 21 are close together in the first direction X, the inner wall surfaces of the multiple first clamping grooves 211 together enclose the first clamping position 22, and the outer wall surface of the suction head 220 is in close contact with the inner wall surface of the first clamping groove 211. The inner wall surface of the first clamping groove 211 can be regarded as the clamping surface of the first clamping member 21. The clamping surface can be a plane, a curved surface, a sawtooth surface, a combination of a plane and a curved surface, etc., without limitation. For example, the orthographic projection of the clamping surface in the second direction Z can be V-shaped, U-shaped, arc-shaped, sawtooth-shaped, wavy, etc.

[0075] Similarly, the second clamping mechanism 30 includes at least two second clamping members 31. Specifically, when there are two second clamping members 31, the two second clamping members 31 are arranged opposite each other; when there are three or more second clamping members 31, the multiple second clamping members 31 are arranged in an array with the center of the second clamping position 32 as the center. Wherein, when there are three or more second clamping members 31, the first direction X is the radial direction of the ring corresponding to the ring array arrangement of the second clamping members 31.

[0076] The structure of the second clamping member 31 and the first clamping member 21 can be the same or similar, or completely different, without restriction.

[0077] Referring to Figure 3, optionally, the second clamping member 31 is block-shaped, and the surface of the second clamping member 31 in the first direction X is provided with a second clamping groove 313. When multiple second clamping members 31 are close to each other in the first direction X, the inner wall surfaces of multiple second clamping grooves 313 are together to form a second clamping position 32, and the outer wall surface of the piston rod 210 is in close contact with the inner wall surface of the second clamping groove 313.

[0078] With this configuration, multiple first clamping members 21 form a first clamping position 22, and multiple second clamping members 31 form a second clamping position 32, so that the pipette tip 220 and the piston rod 210 can be fixed by the first clamping members 21 and the second clamping members 31 respectively, which facilitates subsequent operations such as pipetting. In addition, the multiple first clamping members 21 and the multiple second clamping members 31 can distribute the clamping force, avoiding excessive force at a single point, which may cause deformation of the pipette tip 220 and the piston rod 210 or clamping failure. The multiple first clamping members 21 and the multiple second clamping members 31 provide multi-directional clamping, which can distribute the clamping force and avoid single-point overload, thereby improving the load capacity of the pipetting device 100.

[0079] Referring to Figures 3 and 5, in one embodiment, the piston rod 210 includes a rod body 203 and a locking connector 201. A portion of the rod body 203 extends into the suction head 220, while the locking connector 201 protrudes from the suction head 220. The locking connector 201 is connected to the rod body 203 and protrudes from the outer peripheral surface of the rod body 203. The second clamping member 31 has a clamping surface 311 on the side facing the second clamping position 32. The second clamping member 31 also includes a protrusion 312, which protrudes from the clamping surface 311 and faces the second clamping position 32. The protrusion 312 is used to abut against the locking connector 201 when the clamping surface 311 clamps the rod body 203.

[0080] Optionally, the rod 203 and the snap-fit ​​connector 201 can be a single-piece structure, meaning they can be manufactured using a single-piece process, such as stamping or casting, without limitation. Alternatively, the piston rod 210 can be a separate structure, with the rod 203 and snap-fit ​​connector 201 connected and fixed by welding, bonding, snap-fitting, screwing, or other methods.

[0081] Optionally, the outer peripheral surface of the snap-fit ​​connector 201 is provided with a snap-fit ​​groove 202, and the protrusion 312 is used to extend into the snap-fit ​​groove 202. The snap-fit ​​groove 202 on the outer peripheral surface of the snap-fit ​​connector 201 can be an annular groove connected end to end. There can be multiple snap-fit ​​grooves 202, and the multiple snap-fit ​​grooves 202 are spaced apart in the axial direction of the piston rod 210. The protrusion 312 extends into any one of the snap-fit ​​grooves 202 to cooperate with the second clamping position 32 to fix the piston rod 210.

[0082] Optionally, the clamping surface 311 may be the inner wall surface of the second clamping groove 313. The bottom wall and side wall of the second clamping groove 313 have a smooth transition, and the bottom wall of the second clamping groove 313 is a wall surface opposite to the opening of the second clamping groove 313. Optionally, the protrusion 312 may be provided on the clamping surface 311 in the following ways: the protrusion 312 may be provided only on the bottom wall of the second clamping groove 313, or the protrusion 312 may be provided on both the bottom wall and side wall of the second clamping groove 313, or the protrusion 312 may be provided on the side wall of the second clamping groove 313.

[0083] Optionally, the shape of the clamping surface 311 may be the same as or similar to the shape of the clamping surface of the first clamping member 21, such as a V-shape, U-shape, arc shape, sawtooth shape or wave shape in the orthographic projection in the second direction Z; the shape of the clamping surface 311 may also be different from the shape of the clamping surface of the first clamping member 21, without limitation.

[0084] Optionally, one or more snap-fit ​​connectors 201 can be provided. When there are multiple snap-fit ​​connectors 201, they are spaced apart on the rod body 203. A protrusion 312 can be provided on the clamping surface 311, such as at any end of the clamping surface 311 in the second direction Z; or, two protrusions 312 can be provided on the clamping surface 311, such as at opposite ends of the clamping surface 311 in the second direction Z. When the second clamping member 31 clamps the piston rod 210, the clamping surface 311 contacts and clamps the rod body 203, and the protrusion 312 protrudes from the snap-fit ​​connector 201 and abuts against the outer peripheral surface of the rod body 203. When the second clamping member 31 drives the piston rod 210 to move relative to the suction head 220, by providing the protrusion 312 to cooperate with the clamping surface 311, relative movement between the piston rod 210 and the second clamping member 31 in the second direction Z can be avoided, thus improving clamping stability.

[0085] Optionally, the protrusion 312 may also include a plurality of sub-parts, which are spaced apart on the sidewall of the second clamping groove 313 and arranged radially around the piston rod 210.

[0086] The protrusion 312 protruding from the clamping surface 311 is provided to enhance the connection strength between the second clamping member 31 and the piston rod 210, so as to facilitate the movement of the piston rod 210 relative to the pipette tip 220, and prevent the second clamping member 31 from disengaging from the piston rod 210 during the process of the second clamping member 31 moving the piston rod 210 away from or close to the pipette tip 220, thereby reducing the risk of pipetting operation errors.

[0087] Referring to Figures 1 and 2, in one embodiment, the drive assembly 10 includes a first drive mechanism 11 and a second drive mechanism 12. The first drive mechanism 11 drives the first clamping mechanism 20 and the second clamping mechanism 30 to move in a first direction X, and the second drive mechanism 12 drives the second clamping mechanism 30 to move in a second direction Z. The first drive mechanism 11 is connected to the first clamping mechanism 20 or a floating mechanism 40 corresponding to the first clamping mechanism 20, and is also movably connected to the second drive mechanism 12 or the second clamping mechanism 30 or a floating mechanism 40 corresponding to the second clamping mechanism 30; the second drive mechanism 12 is connected to the second clamping mechanism 30 or a floating mechanism 40 corresponding to the second clamping mechanism 30.

[0088] Optionally, the first drive mechanism 11 and the second drive mechanism 12 can be driven by a motor, hydraulically, or pneumatically, without limitation. When the first drive mechanism 11 and the second drive mechanism 12 are driven by a motor, the first drive component 111 and the second drive component 121 can correspond to a DC motor, AC motor, servo motor, stepper motor, etc.; when the first drive mechanism 11 and the second drive mechanism 12 are driven by a hydraulic system, the first drive component 111 and the second drive component 121 can correspond to a hydraulic pump, hydraulic motor, hydraulic cylinder, etc.; when the first drive mechanism 11 and the second drive mechanism 12 are driven by a pneumatic system, the first drive component 111 and the second drive component 121 can correspond to a cylinder, pneumatic motor, solenoid valve, etc., without limitation.

[0089] Optionally, the first drive mechanism 11 and the first clamping member 21 are connected by a floating mechanism 40, and / or the second drive mechanism 12 and the second clamping member 31 are connected by a floating mechanism 40.

[0090] By controlling the movement of the clamping mechanism in different directions through two driving mechanisms, the pipetting device 100 can achieve multi-directional clamping and positioning of the workpiece, which helps to achieve precise positioning of the suction tip 220 and the piston rod 210, thereby improving the pipetting accuracy and meeting the requirements of high-precision pipetting. Furthermore, high-precision pipetting can be achieved by modifying the parameters of the second driving component 121, ensuring the consistency of the pipetting volume.

[0091] Referring to Figures 1, 2, and 4, in one embodiment, the first clamping mechanism 20 includes two first clamping members 21, and the second clamping mechanism 30 includes two second clamping members 31. The first driving mechanism 11 includes a first driving member 111, two opposing first connecting members 112, and two guide rods 113. The first driving member 111 is connected to the two first connecting members 112. The first connecting members 112 are correspondingly arranged with the first clamping members 21, and the first clamping members 21 are located between the two first connecting members 112. The guide rods 113 are correspondingly connected and fixed to the first connecting members 112, and the guide rods 113 extend along the second direction Z. The first driving member 111 is used to drive the two first connecting members 112 to move closer or further apart along the first direction X, so as to synchronously drive the two first clamping members 21 and the two guide rods 113 to move along the first direction X. The second drive mechanism 12 includes a second drive member 121 and two second connecting members 122. The second drive member 121 is connected to the two second connecting members 122. The second connecting members 122 are slidably connected to the guide rod 113 in a corresponding manner along the second direction Z. The second connecting members 122 are also correspondingly arranged with the second clamping members 31, and the second clamping members 31 are located between the two second connecting members 122. The second drive member 121 is used to drive the two second connecting members 122 to move along the second direction Z on the corresponding guide rod 113, so as to synchronously drive the two second clamping members 31 to move along the second direction Z.

[0092] Optionally, the guide rod 113 is made of a high-strength, wear-resistant, and corrosion-resistant material, such as stainless steel, alloy steel, or carbon fiber. The guide rod 113 is cylindrical to facilitate its mating with parts such as the second connector 122 and reduce frictional resistance. The main function of the guide rod 113 is to provide a stable sliding path, enabling the second connector 122 and the second clamping member 31 to move linearly along it.

[0093] Optionally, two first clamping members 21 are arranged opposite each other in the first direction X. Similarly, two first connecting members 112 are arranged opposite each other in the first direction X, two guide rods 113 are arranged opposite each other in the first direction X, two second connecting members 122 are arranged opposite each other in the first direction X, and two second clamping members 31 are arranged opposite each other in the first direction X.

[0094] Optionally, the connection method between the first driving component 111 and the first connecting component 112 can be screwed, welded, bonded, snap-fitted, etc., without limitation. The connection method between the first connecting component 112 and the guide rod 113 can be screwed, welded, bonded, snap-fitted, etc., without limitation.

[0095] By setting the first driving member 111, the first connecting member 112, and the guide rod 113, the first clamping mechanism 20 and the second clamping mechanism 30 are synchronized in the first direction X, so that the piston rod 210 and the suction head 220 can be clamped and released at the same time, improving the synchronization of the piston rod 210 and the suction head 220. By setting the second driving member 121 and the second connecting member 122, the second clamping mechanism 30 moves relative to the guide rod 113 and the first clamping mechanism 20 in the second direction Z, so that the piston rod 210 moves relative to the suction head 220 to perform liquid suction and discharge, achieving high-precision liquid transfer with a high degree of automation.

[0096] Referring to Figures 1, 2, and 4, in one embodiment, the first clamping mechanism 20 includes two first clamping members 21, and the second clamping mechanism 30 includes two second clamping members 31. A floating mechanism 40 is provided, and the floating mechanism 40 is connected to the second clamping mechanism 30. The floating mechanism 40 includes two sets of centering members, which are respectively connected to the second connecting member 122 and the second clamping member 31. The centering member includes an elastic member 41 and a connecting rod 42. The connecting rod 42 extends along a first direction X. The elastic member 41 is sleeved on the connecting rod 42. One end of the elastic member 41 elastically abuts against the second clamping member 31, and the other end of the elastic member 41 elastically abuts against the second connecting member 122. One end of the connecting rod 42 is fixedly connected to one of the second connecting member 122 and the second clamping member 31, and the other end of the connecting rod 42 is movably connected to the other of the second connecting member 122 and the second clamping member 31. As shown in Figures 1 and 2, the two second clamping members 31 are connected one-to-one with the two sets of aligning members. Each set of aligning members includes two spaced-apart aligning members, and each aligning member consists of an elastic member 41 and a connecting rod 42. One end of the connecting rod 42 is fixedly connected to the second clamping member 31, and the other end is slidably connected to the second connecting member 122; or, one end of the connecting rod 42 is slidably connected to the second clamping member 31, and the other end is fixedly connected to the second connecting member 122.

[0097] Optionally, the two first clamping members 21 are fixedly connected to the two first connecting members 112 one-to-one. Since the pipette tip 220 is generally fixed during pipetting operations, fixing the first clamping members 21 and the first connecting members 112 can keep the center of the first clamping position 22 consistent, and can also simplify the structure and save costs.

[0098] Optionally, two floating mechanisms 40 are provided. Each floating mechanism 40 includes two sets of alignment members. The two sets of alignment members of one floating mechanism 40 are connected one-to-one with the two second clamping members 31, and the two sets of alignment members of the other floating mechanism 40 are connected one-to-one with the two first clamping members 21. This arrangement further improves the clamping flexibility and avoids the inability to achieve alignment of the clamping position if the suction head 220 and / or piston rod 210 are misaligned.

[0099] Optionally, two floating mechanisms 40 are provided: one floating mechanism 40 is connected to the second clamping mechanism 30, and the other floating mechanism 40 is connected to the first clamping mechanism 20. Each floating mechanism 40 includes a set of aligning members. The aligning member corresponding to the second clamping mechanism 30 is connected to a second connecting member 122 and a second clamping member 31 corresponding to the second connecting member 122, respectively. The aligning member corresponding to the first clamping mechanism 20 is connected to a first connecting member 112 and a first clamping member 21 corresponding to the first connecting member 112, respectively. The two sets of aligning members are arranged opposite to each other in the first direction X. Specifically, the floating mechanism 40 is arranged on one side at both the first clamping mechanism 20 and the second clamping mechanism 30. For example, the first direction X is the left-right direction of the pipetting device 100. The floating mechanism 40 corresponding to the first clamping mechanism 20 is disposed at the first clamping member 21 on the left side of the pipetting device 100, and the floating mechanism 40 corresponding to the second clamping mechanism 30 is disposed at the second clamping member 31 on the right side of the pipetting device 100; or, the floating mechanism 40 corresponding to the first clamping mechanism 20 is disposed at the first clamping member 21 on the right side of the pipetting device 100, and the floating mechanism 40 corresponding to the second clamping mechanism 30 is disposed at the second clamping member 31 on the left side of the pipetting device 100. This arrangement can improve clamping flexibility and appropriately simplify the structure.

[0100] Optionally, the floating mechanism 40 is configured to ensure that the pressure exerted by the floating mechanism 40 on the first clamping mechanism 20 and the second clamping mechanism 30 on one side of the first direction X is equal to the pressure exerted by the floating mechanism 40 on the other side of the first direction X on the first clamping mechanism 20 and the second clamping mechanism 30.

[0101] In one embodiment, a floating mechanism 40 is provided, which is connected to the first clamping mechanism 20. The floating mechanism 40 includes two sets of aligning members, which are respectively connected to the first connecting member 112 and the first clamping member 21. This arrangement ensures that the pipette tip 220 is always coaxial with the piston rod 210 when the piston rod 210 moves relative to the pipette tip 220, thus guaranteeing pipetting accuracy.

[0102] By providing a floating mechanism 40 at the clamping mechanism and the connection, when the piston rod 210 is not aligned with the axis of the pipette tip 220, the floating mechanism 40 applies a certain pressure to the pipette tip 220 and / or the piston rod 210 in the first direction X during the movement of the piston rod 210 relative to the pipette tip 220, so that the floating mechanism 40 plays an elastic centering role, avoiding misalignment between the center line of the piston rod 210 and the pipette tip 220, and avoiding a decrease in pipetting accuracy.

[0103] Referring to Figure 1, in one embodiment, the first driving mechanism 11 further includes a first transmission structure 114, through which the first driving member 111 drives the first connecting member 112 to move along the first direction X. The second driving mechanism 12 further includes a second transmission structure 123, through which the second driving member 121 drives the second connecting member 122 to move along the second direction Z.

[0104] Optionally, the first transmission structure 114 and the second transmission structure 123 can be linear transmission mechanisms, rotary transmission mechanisms, screw transmissions, gear transmissions, belt transmissions, chain transmissions, etc., without limitation.

[0105] By setting the first transmission structure 114 and the second transmission structure 123 as intermediate devices, the power and motion of the first driving member 111 and the second driving member 121 can be efficiently transmitted to the first connecting member 112 and the second connecting member 122, realizing energy conversion and transmission; avoiding the complex structure required for the first driving member 111 and the second driving member 121 to directly drive the first connecting member 112 and the second connecting member 122, simplifying the system design of the pipetting device 100, and improving the space utilization of the pipetting device 100.

[0106] Referring to Figures 1 and 2, in one embodiment, the second transmission structure 123 includes a first slide rail 1231, a second slide rail 1232, and a transmission member 1233. The first slide rail 1231 extends along a first direction X, and the second slide rail 1232 extends along a second direction Z. The second connecting member 122 is slidably connected to the first slide rail 1231, and the first slide rail 1231 is slidably connected to the second slide rail 1232. The second driving member 121 drives the first slide rail 1231 to move relative to the second slide rail 1232 along the second direction Z through the transmission member 1233.

[0107] Optionally, the transmission component 1233 includes a lead screw 1235 and a transmission nut 1234. The lead screw 1235 extends along the second direction Z and is connected to the second drive component 121. The transmission nut 1234 is connected to the first slide rail 1231 and is in transmission engagement with the lead screw 1235.

[0108] Optionally, the guide rod 113 passes through the second connector 122, or the second connector 122 is indirectly connected to the guide rod 113. Specifically, the second connector 122 and the guide rod 113 are slidably connected by a sliding member, which can be a bearing, roller, slider, ball, elastomer, etc., without limitation.

[0109] Optionally, the first slide rail 1231 and the second slide rail 1232 can be roller slide rails, ball slide rails, gear slide rails, damping slide rails, etc., without limitation.

[0110] Optionally, the second connector 122 has a dovetail groove on its surface facing the first slide rail 1231, and the first slide rail 1231 has a snap-fit ​​part on its surface facing the second connector 122. The snap-fit ​​part extends into the dovetail groove, thereby preventing the snap-fit ​​part from coming out of the dovetail groove and improving the connection strength between the first slide rail 1231 and the second connector 122.

[0111] Two second connecting members 122 are slidably connected to the first slide rail 1231. The first connecting member 112 and the guide rod 113 drive the second connecting member 122 to move relative to the first slide rail 1231 in the first direction X, so that the first clamping member 21 and the second clamping member 31 move simultaneously in the first direction X. The second driving member 121 drives the first slide rail 1231 to move relative to the second slide rail 1232 in the second direction Z, so that the second clamping member 31 moves in the second direction Z. This allows the suction head 220 and the piston rod 210 to clamp or release simultaneously in the first direction X, and also allows the piston rod 210 to move relative to the suction head 220 in the second direction Z. By setting the first slide rail 1231 and the second slide rail 1232, the stability of the movement of the second clamping member 31 along the first direction X and the second direction Z can be achieved, thereby improving the clamping stability.

[0112] Referring to Figures 1 and 3, in one embodiment, the first connector 112 includes a first connecting portion 1121 and a second connecting portion 1122 connected together. The first connecting portion 1121 extends along the second direction Z, and the second connecting portion 1122 extends along the third direction Y. A first clamping mechanism 20 is disposed at the end of the second connecting portion 1122 in the first direction X. The end of the first connecting portion 1121 away from the second connecting portion 1122 is connected to the first transmission structure 114, and the end of the second connecting portion 1122 away from the first connecting portion 1121 is connected and fixed to the guide rod 113. The first direction X, the second direction Z, and the third direction Y intersect each other.

[0113] Optionally, the first connector 112 can be a one-piece structure, i.e., a one-piece structure manufactured using a single process. The single-piece molding process can specifically include stamping, casting, etc., without limitation. Alternatively, the first connector 1122 can be a separate structure, with the first connecting part 1121 and the second connecting part 1122 connected and fixed by welding, bonding, snap-fitting, screwing, etc. The first connecting part 1121 and the second connecting part 1122 are made of materials with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. Metal materials include, for example, aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys.

[0114] Optionally, the first direction X, the second direction Z, and the third direction Y are mutually perpendicular.

[0115] Referring to Figure 1, optionally, the first clamping member 21 includes a first part 212, a second part 213 and a third part 214 connected in sequence. The first clamping member 21 is generally Z-shaped, wherein the first part 212 and the third part 214 extend along the first direction X, and the second part 213 extends along the second direction Z. The first part 212 and the third part 214 are respectively disposed at both ends of the second part 213 in the second direction Z, and the first part 212 and the third part 214 are disposed on both sides of the second part 213 in the first direction X.

[0116] Optionally, the third part 214 has a first clamping groove 211 on its surface facing away from the second part 213 in the first direction X. The bottom wall and side wall of the first clamping groove 211 have a smooth transition. Optionally, the third part 214 is closer to the second clamping member 31 than the first part 212. This arrangement makes the structure of the pipetting device 100 more compact and applicable to piston assemblies with smaller volume ranges, thus improving the versatility of the pipetting device 100.

[0117] Optionally, the end of the first part 212 facing away from the second part 213 in the first direction X is connected and fixed to the second connecting part 1122. The connection method can be screwed, welded, glued, snap-fitted, etc., without limitation.

[0118] Optionally, the floating mechanism 40 corresponding to the first clamping member 21 connects the first part 212 and the second connecting part 1122. The first part 212 has a first groove on its surface facing the second connecting part 1122, and the second connecting part 1122 has a corresponding second groove on its surface facing the first part 212. The first and second grooves are arranged correspondingly. One end of the connecting rod 42 of the floating mechanism 40 corresponding to the first clamping member 21 is received in the first groove, and the other end of the connecting rod 42 is received in the second groove. The number of the first and second grooves is the same as the number of connecting rods 42 in the floating mechanism 40 corresponding to the first clamping member 21. The two ends of the elastic member 41 of the floating mechanism 40 corresponding to the first clamping member 21 abut against the surfaces of the first part 212 and the second connecting part 1122, respectively. One end of the connecting rod 42 can slide within the corresponding groove, such as within the second groove.

[0119] The device is equipped with a first connecting part 1121 connected to the first driving member 111 and a second connecting part 1122 connected to the guide rod 113 and the first clamping member 21. This enables the first driving member 111 to drive the first clamping member 21 and the guide rod 113 in the first direction X, and the guide rod 113 enables the second clamping member 31 to move in the first direction X. Thus, the synchronous control of two clamping mechanisms can be achieved by one driving member, which simplifies the structure of the pipetting device 100 and saves costs.

[0120] Referring to Figures 1 and 3, in one embodiment, the second connector 122 includes a third connector 1221 and a fourth connector 1222. The end of the third connector 1221 away from the fourth connector 1222 is slidably connected to the first slide rail 1231. The end of the fourth connector 1222 in the first direction X is connected to the second clamping mechanism 30 or a floating mechanism 40 corresponding to the second clamping mechanism 30. The fourth connector 1222 has a through hole 1223 extending through itself in the second direction Z. The guide rod 113 passes through the through hole 1223, and the fourth connector 1222 is slidably connected to the guide rod 113.

[0121] Optionally, the second connector 122 can be a one-piece structure, i.e., a one-piece structure manufactured using a single process. The single-piece molding process can specifically include stamping, casting, etc., without limitation. Alternatively, the second connector 122 can be a separate structure, with the third connecting part 1221 and the fourth connecting part 1222 connected and fixed by welding, bonding, snap-fitting, screwing, etc. The third connecting part 1221 and the fourth connecting part 1222 are made of materials with high structural strength, specifically metal materials, high-strength plastics, ceramics, etc. Metal materials include, for example, aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys.

[0122] Optionally, the dimension of the third connecting part 1221 in the third direction Y is smaller than the dimension of the fourth connecting part 1222 in the third direction Y.

[0123] Referring to Figure 3, optionally, the second clamping member 31 includes a fourth part 314 and a fifth part 315 connected in sequence. The fifth part 315 is disposed at the end of the fourth part 314 away from the drive mechanism in the first direction X. The size of the fifth part 315 in the third direction Y can be less than or equal to the size of the fourth part 314 in the third direction Y. A second clamping groove 313 is provided on the surface of the fifth part 315 facing away from the fourth part 314.

[0124] Optionally, the floating mechanism 40 corresponding to the second clamping member 31 connects the fourth part 314 and the fourth connecting part 1222. The surface of the fourth part 314 facing the fourth connecting part 1222 has a third groove 3141, and the surface of the fourth connecting part 1222 facing the fourth part 314 has a corresponding fourth groove 1224. The third groove 3141 and the fourth groove 1224 are correspondingly arranged. One end of the connecting rod 42 of the floating mechanism 40 corresponding to the second clamping member 31 is received in the third groove 3141, and the other end of the connecting rod 42 is received in the fourth groove 1224. The number of third grooves 3141 and fourth grooves 1224 is the same as the number of connecting rods 42 in the floating mechanism 40 corresponding to the second clamping member 31. The two ends of the elastic member 41 of the floating mechanism 40 corresponding to the second clamping member 31 abut against the surface of the fourth part 314 and the surface of the fourth connecting part 1222, respectively. One end of the connecting rod 42 can slide in the corresponding groove, such as sliding in the fourth groove 1224.

[0125] The system includes a third connecting part 1221 connected to the first slide rail 1231 and a fourth connecting part 1222 connected to the guide rod 113 and the second clamping member 31. This enables the second clamping member 31 to be driven relative to the first slide rail 1231 in the first direction X, and to move in the second direction Z through the through hole 1223 and the guide rod 113.

[0126] Referring to Figure 1, in one embodiment, the pipetting device 100 further includes a housing 60, and a first driving member 111 and / or a second driving member 121 are housed within the housing 60. The connection method between the first driving member 111 and / or the second driving member 121 and the housing 60 can be screwed, welded, snap-fitted, adhesive, etc., without limitation. The housing 60 is made of a material with high structural strength, specifically a metal material, high-strength plastic, ceramic, etc. Metal materials include, for example, aluminum, aluminum alloys, magnesium alloys, iron, and iron alloys.

[0127] Optionally, the end of the guide rod 113 furthest from the first connector 112 is connected and fixed to the housing 60. The connection and fixation method between the guide rod 113 and the housing 60 can be bonding, welding, snap-fitting, screwing, etc., without limitation. Optionally, the end of the guide rod 113 furthest from the first connector 112 is a free end.

[0128] The housing 60 is used to protect the first drive unit 111 and the second drive unit 121 during normal use, and can also improve the appearance of the pipetting device 100.

[0129] Referring to Figure 1, in one embodiment, the pipetting device 100 further includes an adapter 50 for connecting to a transport device.

[0130] The specific shape of the adapter 50 can be determined by any feasible solution, and this embodiment of the utility model does not impose any limitations.

[0131] The adapter 50 and the pipetting device 100 can be an integrated structure or a separate structure, without restriction.

[0132] The adapter 50 can be connected to the conveying device via pneumatic connection, screw connection, snap-fit ​​connection, magnetic connection, etc., without limitation. Preferably, the adapter 50 is connected to the conveying device via pneumatic connection, the adapter 50 is a quick-change female connector, and the conveying device is equipped with a quick-change male connector, so that the two can be quickly loaded and unloaded.

[0133] Optionally, the adapter 50 and the housing 60 are connected and fixed at the end away from the first connector 112 in the second direction Z. The adapter 50 and the housing 60 can be detachably connected, or the adapter 50 and the housing 60 can be connected and fixed, without limitation.

[0134] The adapter 50 provided in the pipetting device 100 helps to improve the flexibility of the pipetting device 100 and broaden the scope of its application.

[0135] Referring to Figures 1 and 5, this utility model provides an experimental device, including a liquid aspiration mechanism 200 and a pipetting device 100 as described in any of the foregoing embodiments. The liquid aspiration mechanism 200 includes a piston rod 210 and a pipette tip 220. One end of the piston rod 210 extends into the pipette tip 220, and the other end protrudes from the pipette tip 220. The pipetting device 100 is used to clamp the piston rod 210 and the pipette tip 220, and drive the piston rod 210 to move relative to the pipette tip 220 in the second direction Z.

[0136] The experimental equipment of this invention can control the liquid transfer volume of the aspiration mechanism 200 by setting the parameters of the drive component 10, ensuring the accuracy of liquid transfer. When the first clamping mechanism 20 and the second clamping mechanism 30 clamp the piston rod 210 and the pipette tip 220 of the aspiration mechanism 200, the floating mechanism 40 ensures that the center of the piston rod 210 and the pipette tip 220 are aligned during liquid transfer, thereby ensuring the airtightness of the internal cavity of the aspiration mechanism 200. At the same time, in the production process using the aspiration mechanism 200, the experimental equipment of this invention can improve production efficiency and production accuracy, reduce manual intervention, and thus avoid the occurrence of human error.

[0137] In one embodiment, the experimental equipment further includes a transport device connected to the pipetting device 100, which is used to move the pipetting device 100.

[0138] Optionally, the handling device can be a robotic arm, a conveyor, a lifting device, etc., without limitation. Specifically, the robotic arm may include an actuator (arm, etc.), a drive system (such as a motor, hydraulic or pneumatic device), a control system (such as a PLC, microcontroller, etc.), and sensors.

[0139] This configuration, with the adapter 50, improves the efficiency of connecting and replacing the transport device and the pipetting device 100, and enhances the flexibility of the transport device.

[0140] In the description of the embodiments of this utility model, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0141] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Those skilled in the art can understand that implementing all or part of the above-described embodiments and making equivalent changes in accordance with the claims of the present utility model are still within the scope of the present utility model.

Claims

1. A pipetting device for holding a liquid aspiration mechanism, the liquid aspiration mechanism comprising a piston rod and a pipette tip, one end of the piston rod extending into the pipette tip and the other end protruding from the pipette tip, characterized in that, include: Driver components; A first clamping mechanism is connected to the drive assembly and is used to form a first clamping position for clamping the suction head; A second clamping mechanism, connected to the drive assembly, is used to form a second clamping position for clamping a piston rod; at least one floating mechanism is connected to the drive assembly, wherein the first clamping mechanism is floatingly connected to one of the floating mechanisms, and / or the second clamping mechanism is floatingly connected to one of the floating mechanisms; the drive assembly is used to drive the first clamping mechanism and the second clamping mechanism to move along a first direction to clamp the suction head and the piston rod respectively; the drive assembly is also used to drive the second clamping mechanism to move relative to the first clamping mechanism along a second direction so that the piston rod moves relative to the suction head; the floating mechanism is used to move in the first direction so that the centers of the first clamping position and the centers of the second clamping position are aligned axially with the suction head, and the first direction intersects the second direction.

2. The pipetting apparatus according to claim 1, characterized in that, The floating mechanism includes at least one set of centering members, each centering member including an elastic element. The elastic element is used to elastically deform along the first direction. One end of the elastic element elastically abuts against the first clamping mechanism or the second clamping mechanism, and the other end of the elastic element elastically abuts against the driving assembly.

3. The pipetting device according to claim 2, characterized in that, The centering component further includes a connecting rod that extends along the first direction. One end of the connecting rod is fixedly connected to one of the corresponding clamping mechanism and the driving assembly, and the other end of the connecting rod is movably connected to the other of the corresponding clamping mechanism and the driving assembly. The elastic element is sleeved on the connecting rod.

4. The pipetting apparatus according to claim 1, characterized in that, The first clamping mechanism includes at least two first clamping members, each of which is used to jointly form the first clamping position. The driving component is used to drive each of the first clamping members to move along the first direction to clamp or release the suction head. The second clamping mechanism includes at least two second clamping members, each of which is used to jointly form the second clamping position. The driving component is used to drive each of the second clamping members to move along the first direction to clamp or release the piston rod.

5. The pipetting apparatus according to claim 4, characterized in that, The piston rod includes a rod body and a locking connector. The rod body extends into the suction head, and the locking connector protrudes from the suction head. The locking connector is connected to the rod body and protrudes from the outer peripheral surface of the rod body. The second clamping member has a clamping surface on the side facing the second clamping position. The second clamping member also includes a protrusion. The protrusion protrudes from the clamping surface and faces the second clamping position. The protrusion is used to abut against the locking connector when the rod body is clamped by the clamping surface.

6. The pipetting apparatus according to any one of claims 1-5, characterized in that, The driving assembly includes a first driving mechanism and a second driving mechanism. The first driving mechanism is used to drive the first clamping mechanism and the second clamping mechanism to move in the first direction, and the second driving mechanism is used to drive the second clamping mechanism to move in the second direction. The first driving mechanism is connected to the first clamping mechanism or the floating mechanism corresponding to the first clamping mechanism, and the first driving mechanism is also movably connected to the second driving mechanism or the second clamping mechanism or the floating mechanism corresponding to the second clamping mechanism. The second driving mechanism is connected to the second clamping mechanism or the floating mechanism corresponding to the second clamping mechanism.

7. The pipetting apparatus according to claim 6, characterized in that, The first clamping mechanism includes two first clamping members, and the second clamping mechanism includes two second clamping members. The first driving mechanism includes a first driving member, two oppositely arranged first connecting members, and two guide rods. The first driving member is connected to the two first connecting members. The first connecting members are correspondingly arranged with the first clamping members, and the first clamping members are located between the two first connecting members. The guide rods are correspondingly connected and fixed to the first connecting members, and the guide rods extend along the second direction. The first driving member is used to drive the two first connecting members to move closer or further away from each other along the first direction, so as to synchronously drive the two first clamping members and the two guide rods to move along the first direction. The second driving mechanism includes a second driving member and two second connecting members. The second driving member is connected to the two second connecting members. The second connecting members are slidably connected with the guide rods along the second direction, and the second connecting members are also correspondingly arranged with the second clamping members, and the second clamping members are located between the two second connecting members. The second driving member is used to drive the two second connecting members to move along the second direction on the corresponding guide rods, so as to synchronously drive the two second clamping members to move along the second direction.

8. The pipetting apparatus according to claim 7, characterized in that, The floating mechanism is provided in one unit and is connected to the second clamping mechanism. The floating mechanism includes two sets of aligning members, each corresponding to a second connecting member and a second clamping member. Each aligning member includes an elastic element and a connecting rod. The connecting rod extends along the first direction. The elastic element is sleeved on the connecting rod. One end of the elastic element elastically abuts against the second clamping member, and the other end elastically abuts against the second connecting member. One end of the connecting rod is fixedly connected to one of the second connecting member and the second clamping member, and the other end of the connecting rod is fixedly connected to the second clamping member. The other of the connecting member and the second clamping member is movably connected; or, there are two floating mechanisms, one of which is connected to the second clamping mechanism and the other is connected to the first clamping mechanism; the floating mechanism includes a set of centering members, the centering members corresponding to the second clamping mechanism are respectively connected to a second connecting member and a second clamping member corresponding to the second connecting member, the centering members corresponding to the first clamping mechanism are respectively connected to a first connecting member and a first clamping member corresponding to the first connecting member, and the two sets of centering members are arranged opposite to each other in the first direction.

9. The pipetting apparatus according to claim 7, characterized in that, The first driving mechanism further includes a first transmission structure, through which the first driving member drives the first connecting member to move along the first direction; the second driving mechanism further includes a second transmission structure, through which the second driving member drives the second connecting member to move along the second direction.

10. The pipetting apparatus according to claim 9, characterized in that, The second transmission structure includes a first slide rail, a second slide rail, and a transmission component. The first slide rail extends along the first direction, the second slide rail extends along the second direction, the second connecting component is slidably connected to the first slide rail, the first slide rail is slidably connected to the second slide rail, and the second driving component drives the first slide rail to move relative to the second slide rail along the second direction through the transmission component.

11. The pipetting apparatus according to claim 9, characterized in that, The first connector includes a first connecting portion and a second connecting portion. The first connecting portion extends along the second direction, and the second connecting portion extends along the third direction. The first clamping mechanism is disposed at the end of the second connecting portion in the first direction. The end of the first connecting portion away from the second connecting portion is connected to the first transmission structure, and the end of the second connecting portion away from the first connecting portion is connected and fixed to the guide rod. The first direction, the second direction, and the third direction intersect each other.

12. The pipetting apparatus according to claim 10, characterized in that, The second connector includes a third connecting part and a fourth connecting part. The end of the third connecting part away from the fourth connecting part is slidably connected to the first slide rail. The end of the fourth connecting part in the first direction is connected to the second clamping mechanism or a floating mechanism corresponding to the second clamping mechanism. The fourth connecting part has a through hole that extends through itself in the second direction. The guide rod passes through the through hole, and the fourth connecting part is slidably connected to the guide rod.

13. The pipetting apparatus according to claim 1, characterized in that, The pipetting device also includes an adapter for connecting to a transport device.

14. An experimental apparatus, characterized in that, The device includes a liquid aspiration mechanism and a pipetting apparatus as described in any one of claims 1 to 13. The liquid aspiration mechanism includes a piston rod and a pipette tip. One end of the piston rod extends into the pipette tip, and the other end protrudes from the pipette tip. The pipetting apparatus is used to clamp the piston rod and the pipette tip, and to drive the piston rod to move relative to the pipette tip in the second direction.

15. The experimental apparatus according to claim 14, characterized in that, The experimental equipment also includes a transport device, which is connected to the pipette and is used to move the pipette.

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