CN110841740A

CN110841740A - Liquid transfer platform

Info

Publication number: CN110841740A
Application number: CN201911086811.7A
Authority: CN
Inventors: 闫林刚; 张俊
Original assignee: SHENZHEN WONTEC TECHNOLOGY Co Ltd
Current assignee: SHENZHEN WONTEC TECHNOLOGY Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-02-28

Abstract

The invention is suitable for the technical field of biological detection and provides a liquid transfer platform. The liquid transfer platform comprises a liquid transfer unit and a shielding unit, wherein the liquid transfer unit is used for sucking a solution from a target piece or injecting the solution into the target piece, the shielding unit is arranged below the liquid transfer unit and is provided with a driving part, the shielding unit is used for receiving the solution dripped by the liquid transfer unit, and the shielding unit is provided with a driven part matched with the driving part; when the pipetting unit moves towards the direction close to the target piece, the driving part guides the driven part to move and drives the shielding unit to evacuate from the lower part of the pipetting unit; when moving liquid transfer unit towards the direction of keeping away from the target piece, shelter from the unit and remove liquid transfer unit's below, can solve current liquid transfer mechanism and have the liquid after moving liquid and easily drip and lead to the technical problem of the production of pollution.

Description

Liquid transfer platform

Technical Field

The invention relates to the technical field of biological detection, in particular to a liquid transfer platform.

Background

With the rapid development of scientific technology, the pipetting work of hospitals, blood stations and other units is not a small-scale experiment of a plurality of samples, but a large-scale experiment with multiple ways and diversification needs to be carried out by using multiple experimental techniques in the face of more complicated research objects and increasing sample quantity. The sample processing work of manual pipetting not only needs a large amount of manpower, material resources and time, but also brings many human errors due to manual operation, so that the pipetting accuracy of the sample processing is low, the error probability is high, and the stability and repeatability of the sample processing are poor, so that the realization of automatic operation of a part or the whole process in the experimental operation flow becomes a necessary trend. However, the existing pipetting mechanism has the problem that liquid is easy to drip after pipetting, thereby causing pollution.

Disclosure of Invention

The invention aims to provide a pipetting platform, and aims to solve the technical problem that the pollution is caused because liquid is easy to drip after pipetting in the conventional pipetting mechanism.

The invention is realized in such a way that a pipetting platform comprises:

the liquid transferring unit is used for sucking the solution from the target piece or injecting the solution into the target piece, and an active part is arranged on the liquid transferring unit; and

the shielding unit is arranged below the liquid transferring unit and used for receiving the solution dripped by the liquid transferring unit, and a driven part matched with the driving part is arranged on the shielding unit;

when the pipetting unit moves towards the direction close to the target piece, the driving part guides the driven part to move and drives the shielding unit to evacuate from the lower part of the pipetting unit; when the pipetting unit moves in a direction away from the target member, the shielding unit moves below the pipetting unit.

In one embodiment, the shielding unit comprises a shielding piece arranged below the pipetting unit, and a collecting tank for collecting the solution is arranged on the shielding piece.

In one embodiment, the liquid-transfering platform further comprises a supporting unit, the liquid-transfering unit is arranged on the supporting unit and can reciprocate along a first direction relative to the supporting unit, the shielding piece can reciprocate along a second direction relative to the supporting unit, and the first direction and the second direction are arranged at a preset included angle.

In one embodiment, the shielding unit further comprises a first connecting piece connected with the shielding piece, and a driven piece connected with the first connecting piece, the driven part is arranged on the driven piece, and the first connecting piece is arranged on the supporting unit and can reciprocate along a second direction relative to the supporting unit.

In one embodiment, the shielding unit further comprises a first elastic piece sleeved on the first connecting piece, and one end of the first connecting piece, which is far away from the shielding piece, penetrates through the supporting unit and is connected with the driven piece; one end of the first elastic piece is connected with one end, close to the shielding piece, of the first connecting piece, and the other end of the first elastic piece is connected with the supporting unit.

In one embodiment, the pipetting platform further comprises a displacement drive for driving the pipetting unit in the first direction, the displacement drive being provided on the support unit.

In one embodiment, the driven part is provided with a connecting surface for cooperating with the driving part, and the connecting surface has displacement components in the first direction and the second direction; alternatively, the first and second electrodes may be,

the driving portion is provided with a connecting surface used for being matched with the driven portion, and the connecting surface is provided with displacement components in the first direction and the second direction.

In one embodiment, the driving part is provided with a roller for matching with the connecting surface, and the roller can rotate relative to the driving part; alternatively, the first and second electrodes may be,

the driven part is provided with a roller used for being matched with the connecting surface, and the roller can rotate relative to the driven part.

In one embodiment, the connecting surface is a bevel, an arc or a curved surface.

In one embodiment, the pipetting unit comprises a cannula, a plunger with one end sleeved in the cannula, a suction head connected with the cannula, and a pipetting driving member for driving the plunger to move in the cannula.

The invention provides a liquid transfer platform, which comprises a liquid transfer unit and a shielding unit, wherein the liquid transfer unit is used for sucking a solution from a target piece or injecting the solution into the target piece, the shielding unit is arranged below the liquid transfer unit, the liquid transfer unit is provided with a driving part, the shielding unit is used for receiving the solution dripped by the liquid transfer unit, and the shielding unit is provided with a driven part matched with the driving part; when the pipetting unit moves towards the direction close to the target piece, the driving part guides the driven part to move and drives the shielding unit to evacuate from the lower part of the pipetting unit; when moving liquid transfer unit towards the direction of keeping away from the target piece, shelter from the unit and remove liquid transfer unit's below, can solve current liquid transfer mechanism and have the liquid after moving liquid and easily drip and lead to the technical problem of the production of pollution.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 and fig. 2 are schematic perspective views of a pipetting platform according to an embodiment of the invention;

fig. 3 and 4 are schematic perspective views of a pipetting unit provided by an embodiment of the invention;

FIG. 5 is a schematic diagram of a side view of a pipetting unit provided by an embodiment of the invention;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5;

fig. 7 is a schematic perspective view of a supporting unit according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of a shielding unit according to an embodiment of the present invention;

fig. 9 is a schematic view of a first combination structure of the driving portion and the driven portion according to the embodiment of the present invention;

fig. 10 is a schematic view of a second combination structure of the driving portion and the driven portion according to the embodiment of the invention;

fig. 11 is a schematic view of a third combination structure of the driving part and the driven part according to the embodiment of the invention;

fig. 12 is a schematic diagram of a fourth combination structure of the driving part and the driven part according to the embodiment of the invention;

fig. 13 is a schematic view of a fifth combination structure of the driving part and the driven part according to the embodiment of the invention;

fig. 14 is a schematic diagram of a sixth combined structure of the driving portion and the driven portion according to the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

100-liquid-transfering unit, 110-second support frame, 111-first connecting seat, 1111-active part, 112-second connecting seat, 113-second fixing seat, 114-third fixing seat, 121-sleeve, 122-plunger, 123-suction head, 124-sleeve cover, 125-second elastic component, 126-detaching seat;

200-shutter unit, 211-shutter, 2111-catch bowl, 212-first connector, 213-follower, 2131-follower, 214-second connector, 215-fixing plate, 216-first elastic element;

300-a support unit, 310-a first support frame, 311-a first fixed seat, 312-a base;

410-displacement driving piece, 411-first screw rod, 420-liquid-transferring driving piece and 421-second screw rod;

510-connecting face, 520-roller, 530-first rack portion, 540-second rack portion, 550-driven gear;

611-first slider, 612-second slider, 621-first sliding rail, 622-second sliding rail;

y-a first direction, X-a second direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the patent. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

In order to explain the technical solution of the present invention, the following detailed description is made with reference to the specific drawings and examples.

Referring to fig. 1 and fig. 2, the present invention provides a liquid-transferring platform, including:

a liquid transfer unit 100 for sucking a solution from or pouring a solution into a target, the liquid transfer unit 100 being provided with an active part 1111;

a shielding unit 200 provided below the liquid transfer unit 100 and configured to receive the solution dropped by the liquid transfer unit 100, wherein the shielding unit 200 is provided with a driven part 2131 configured to cooperate with the driving part 1111;

when the pipetting unit 100 moves towards the direction close to the target piece, the driving part 1111 guides the driven part 2131 to move and drives the shielding unit 200 to evacuate from the lower part of the pipetting unit 100; when the pipetting unit 100 is moved in a direction away from the target member, the shutter unit 200 is moved below the pipetting unit 100. In this embodiment, the target member may be, but is not limited to being, a container.

The liquid-transfering platform of the embodiment of the invention comprises a liquid-transfering unit 100 for absorbing solution from a target piece or injecting solution into the target piece and a shielding unit 200 for receiving the solution dripped by the liquid-transfering unit 100, wherein a driving part 1111 is arranged on the liquid-transfering unit 100, the shielding unit 200 is arranged below the liquid-transfering unit 100, and a driven part 2131 matched with the driving part 1111 is arranged on the shielding unit 200; when the pipetting unit 100 moves towards the direction close to the target piece, the driving part 1111 guides the driven part 2131 to move and drives the shielding unit 200 to evacuate from the lower part of the pipetting unit 100, so that the pipetting unit 100 can suck the solution from the target piece or inject the solution into the target piece; when the pipetting unit 100 moves in a direction away from the target piece, the shielding unit 200 moves below the pipetting unit 100 to prevent the solution sucked by the pipetting unit 100 or the residual solution from dropping, thereby solving the technical problem that the existing pipetting mechanism is easy to drop the liquid after pipetting and causes pollution.

Specifically, in an embodiment of the present invention, referring to fig. 1 and 8, the shielding unit 200 includes a shielding member 211 disposed below the pipetting unit 100, and a collecting tank 2111 for collecting the solution is opened on the shielding member 211. When the solution or the residual solution that pipetting unit 100 absorb drips, collecting vat 2111 can collect the dripped solution, avoids the dripped solution to cause the pollution, and after collecting vat 2111 was filled with the solution, the workman can clear up collecting vat 2111, easy operation.

Specifically, referring to fig. 1, fig. 2 and fig. 7, in an embodiment of the present invention, the liquid-transferring platform further includes a supporting unit 300, the liquid-transferring unit 100 is disposed on the supporting unit 300 and can reciprocate along a first direction Y relative to the supporting unit 300, the shielding element 211 can reciprocate along a second direction X relative to the supporting unit 300, and the first direction Y and the second direction X are disposed at a predetermined included angle. In the embodiment of the present invention, the support unit 300 is disposed on the pipetting platform, so that the pipetting unit 100 can move along the first direction Y, and the pipetting unit 100 can move close to or away from the target piece to perform the liquid taking or liquid injecting operation.

Further, in the pipetting platform according to the embodiment of the present invention, the first direction Y and the second direction X are vertically disposed, and of course, the angle between the first direction Y and the second direction X may be modified as appropriate according to the choice of the actual situation, as long as the first direction Y and the second direction X are not overlapped.

Specifically, in an embodiment of the present invention, referring to fig. 8, the shielding unit 200 further includes a first connecting member 212 connected to the shielding member 211, and a driven member 213 connected to the first connecting member 212, the driven portion 2131 is disposed on the driven member 213, and the first connecting member 212 is disposed on the supporting unit 300 and can reciprocate along the second direction X relative to the supporting unit 300. With reference to fig. 1, 2 and 8, when the pipetting unit 100 moves in the first direction Y toward the target member, the driving portion 1111 will first abut against the driven portion 2131 of the driven member 213, and then the driven member 213 will be guided to move in the second direction X, and the first connecting member 212 and the shielding member 211 will be driven to withdraw from the lower side of the pipetting unit 100 in the second direction X, so as to avoid the shielding member 211 from affecting the pipetting unit 100 to perform the liquid taking or filling operation.

It should be emphasized that, in the shielding unit 200 according to the embodiment of the present invention, more connecting structures may be further disposed between the shielding member 211 and the first connecting member 212 to achieve connection between the shielding member 211 and the first connecting member 212; and/or more connecting structures are provided between the first connecting member 212 and the follower 213 to achieve the connection between the first connecting member 212 and the follower 213. The arrangement of the connecting structure can be selected according to actual conditions, and the invention is not limited herein.

Further, as shown in fig. 8, the shielding unit 200 of the embodiment of the present invention further includes a second connecting member 214 having one end capable of being, but not limited to, vertically connected to the shielding member 211 by a screw, and an end of the second connecting member 214 away from the shielding member 211 is vertically connected to the first connecting member 212, so as to achieve connection between the shielding member 211 and the first connecting member 212. It is understood that the connection angle between the second connection member 214 and the shielding member 211 and the connection angle between the second connection member 214 and the first connection member 212 can be properly adjusted according to the choice of the actual situation, and the invention is not limited herein.

Further, as shown in fig. 8, the shielding unit 200 of the embodiment of the present invention further includes a fixing plate 215 connected to an end of the first connecting member 212 far from the shielding member 211, and the follower 213 may be, but is not limited to, disposed on the fixing plate 215 by a screw, so as to achieve connection between the first connecting member 212 and the follower 213.

Specifically, in an embodiment of the present invention, referring to fig. 1, fig. 2 and fig. 8, the shielding unit 200 further includes a first elastic element 216 sleeved on the first connecting element 212, and one end of the first connecting element 212, which is far away from the shielding element 211, passes through the supporting unit 300 and is connected to the driven element 213 (the fixing plate 215); one end of the first elastic member 216 is connected to one end of the first connecting member 212 adjacent to the shutter 211, and the other end is connected to the supporting unit 300. When the pipetting unit 100 is moved in the first direction Y in a direction away from the target member, the driving portion 1111 moves in a direction away from the driven portion 2131, and at this time, the first connection member 212 moves in the second direction X by the elastic force of the first elastic member 216, and the blocking member 211 moves below the pipetting unit 100, so that the solution sucked by the pipetting unit 100 or the remaining solution is prevented from dropping.

Specifically, in an embodiment of the present invention, as shown in fig. 9 and 10, the driven portion 2131 is provided with a connecting surface 510 for cooperating with the driving portion 1111, the connecting surface 510 has displacement components in the first direction Y and the second direction X, and after the driving portion 1111 moves downward along the first direction Y and abuts against the connecting surface 510, the driven portion 2131 can be guided to move in the second direction X and drive the shielding member 211 to withdraw from below the pipetting unit 100, so as to avoid the shielding member 211 from affecting the pipetting unit 100 to perform the liquid taking or filling operation.

Further, the driving portion 1111 is provided with a roller 520 for engaging with the connecting surface 510, and the roller 520 can rotate relative to the driving portion 1111. When the driving portion 1111 moves downward along the first direction Y, the roller 520 on the driving portion 1111 abuts against the connection surface 510, and then the roller 520 rotates relative to the connection surface 510 along with the driving portion 1111 moving downward along the first direction Y, and pushes the driven portion 2131 to move along the second direction X, and drives the shielding member 211 to withdraw from the lower portion of the liquid transferring unit 100, so as to prevent the shielding member 211 from affecting the operation of liquid taking or liquid injection of the liquid transferring unit 100.

Optionally, fig. 9 is a schematic view of a first combination structure of the driving portion 1111 and the driven portion 2131 according to an embodiment of the present invention, and with reference to fig. 5, fig. 8 and fig. 9, an included angle α between a tangential direction of any point on the connection surface 510 and the first direction Y is smaller than 90 °, when the driving portion 1111 moves downward along the first direction Y, the roller 520 on the driving portion 1111 abuts against the connection surface 510, and as the driving portion 1111 continues to move downward along the first direction Y, the roller 520 rotates relative to the connection surface 510, and pushes the driven portion 2131 to move rightward along the second direction X, and drives the shielding member 211 to withdraw from below the pipetting unit 100, so as to avoid the shielding member 211 from affecting the pipetting unit 100 to perform the operation of pipetting or injecting liquid.

Optionally, fig. 10 is a schematic view of a second combination structure of the driving portion 1111 and the driven portion 2131 according to an embodiment of the present invention, and with reference to fig. 5, fig. 8 and fig. 10, an included angle α between a tangential direction of any point on the connection surface 510 and the first direction Y is greater than 90 °, when the driving portion 1111 moves downward along the first direction Y, the roller 520 on the driving portion 1111 abuts against the connection surface 510, and as the driving portion 1111 continues to move downward along the first direction Y, the roller 520 rotates relative to the connection surface 510, and pushes the driven portion 2131 to move leftward along the second direction X, and drives the shielding member 211 to withdraw from below the pipetting unit 100, so as to avoid the shielding member 211 from affecting the pipetting unit 100 to perform the operation of pipetting or injecting liquid.

Specifically, in an embodiment of the present invention, as shown in fig. 5, 8, 11 and 12, the driving portion 1111 is provided with a connecting surface 510 for being engaged with the driven portion 2131, the connecting surface 510 has displacement components in the first direction Y and the second direction X, and when the driving portion 1111 moves downward along the first direction Y until the connecting surface 510 abuts against the driven portion 2131, the driving portion can guide the driven portion 2131 to move in the second direction X and drive the shielding member 211 to withdraw from below the pipetting unit 100, so as to avoid the shielding member 211 from affecting the pipetting unit 100 to perform the operation of liquid taking or liquid injection.

Further, the driven portion 2131 is provided with a roller 520 for engaging with the connecting surface 510, and the roller 520 is rotatable relative to the driven portion 2131. When the driving portion 1111 moves downward along the first direction Y, and the connection surface 510 abuts against the driven portion 2131, the roller 520 rotates relative to the connection surface 510 along with the driving portion 1111 moving downward along the first direction Y, and the connection surface 510 pushes the driven portion 2131 to move along the second direction X, and drives the shielding member 211 to withdraw from the lower portion of the pipetting unit 100, so as to prevent the shielding member 211 from affecting the operation of the pipetting unit 100 for liquid taking or liquid injection.

Optionally, fig. 11 is a schematic view of a third combined structure of the driving portion 1111 and the driven portion 2131 according to an embodiment of the present invention, and with reference to fig. 5, fig. 8 and fig. 11, an included angle α between a tangential direction of any point on the connection surface 510 and the first direction Y is greater than 90 °, when the driving portion 1111 moves downward along the first direction Y, the connection surface 510 abuts against the roller 520, and as the driving portion 1111 continues to move downward along the first direction Y, the roller 520 rotates relative to the connection surface 510, the connection surface 510 pushes the driven portion 2131 to move rightward along the second direction X, and drives the shielding member 211 to withdraw from below the pipetting unit 100, so as to avoid the shielding member 211 from affecting the operation of the pipetting unit 100 for liquid taking or filling.

Optionally, fig. 12 is a schematic diagram of a fourth combination structure of the driving portion 1111 and the driven portion 2131 according to an embodiment of the present invention, and with reference to fig. 5, fig. 8 and fig. 12, an included angle α between a tangential direction of any point on the connection surface 510 and the first direction Y is smaller than 90 °, when the driving portion 1111 moves downward along the first direction Y, the connection surface 510 abuts against the roller 520, and as the driving portion 1111 continues to move downward along the first direction Y, the roller 520 rotates relative to the connection surface 510, the connection surface 510 pushes the driven portion 2131 to move leftward along the second direction X, and drives the shielding member 211 to withdraw from below the pipetting unit 100, so as to avoid the shielding member 211 from affecting the pipetting unit 100 to perform the operation of pipetting or injecting liquid.

Optionally, in the pipetting platform according to the embodiment of the present invention, the connection surface 510 may be an inclined surface, and the connection surface 510 may also be an arc surface or a curved surface according to the selection of the actual situation, which is not limited herein.

Specifically, in one embodiment of the present invention, as shown in fig. 13 and 14, the driving portion 1111 is provided with a first rack portion 530 in the first direction Y, the driven portion 2131 is provided with a second rack portion 540 in the second direction X, and the first rack portion 530 and the second rack portion 540 are engaged with each other by at least one driven gear 550. When the driving portion 1111 moves downward along the first direction Y, the first rack 530 drives the driven gear 550 to rotate, the driven gear 550 drives the second rack 540 to move along the second direction X, and drives the shielding piece 211 to withdraw from the lower side of the liquid transferring unit 100, so as to prevent the shielding piece 211 from influencing the operation of liquid taking or liquid injection of the liquid transferring unit 100.

Optionally, fig. 13 is a schematic view of a fifth combination structure of the driving portion 1111 and the driven portion 2131 according to the embodiment of the present invention, and with reference to fig. 5, fig. 8 and fig. 13, the driven gear 550 is disposed on a side of the driving portion 1111 away from the second supporting frame 110. When the driving portion 1111 moves downward along the first direction Y, the first rack 530 drives the driven gear 550 to rotate, the driven gear 550 drives the second rack 540 to move rightward along the second direction X, and drives the shielding piece 211 to withdraw from the lower side of the liquid transfer unit 100, so as to prevent the shielding piece 211 from influencing the operation of taking or injecting liquid from the liquid transfer unit 100.

Optionally, fig. 14 is a schematic diagram of a sixth combined structure of the driving portion 1111 and the driven portion 2131 according to the embodiment of the present invention, and with reference to fig. 5, 8 and 14, the driven gear 550 is disposed on a side of the driving portion 1111 close to the second supporting frame 110. When the driving portion 1111 moves downward along the first direction Y, the first rack 530 drives the driven gear 550 to rotate, the driven gear 550 drives the second rack 540 to move leftward along the second direction X, and drives the shielding member 211 to withdraw from the lower portion of the pipetting unit 100, so as to prevent the shielding member 211 from affecting the pipetting unit 100 to perform the operation of pipetting or injecting liquid.

Specifically, in one embodiment of the present invention, as shown in fig. 1, 2 and 7, the pipetting platform further comprises a displacement drive 410 for driving the pipetting unit 100 to reciprocate along the first direction Y, the displacement drive 410 being provided on the support unit 300.

Further, the supporting unit 300 includes a first supporting frame 310, a first fixing seat 311 is disposed at the top of the first supporting frame 310 corresponding to the displacement driving element 410, the displacement driving element 410 is disposed on the first fixing seat 311, and one end of the first lead screw 411 passes through the first fixing seat 311 and then is connected to the displacement driving element 410, so as to fix the displacement driving element 410 on the first supporting frame 310.

As an alternative embodiment, with reference to fig. 4 and 7, the liquid-transferring platform further includes a first lead screw 411 connected to the displacement driving unit 410, the displacement driving unit 410 is a motor, a first connecting seat 111 is disposed on the liquid-transferring unit 100 corresponding to the first lead screw 411, a first nut (not shown) in threaded fit with the first lead screw 411 is disposed on the first connecting seat 111, and the displacement driving unit 410 drives the first lead screw 411 to rotate, so as to drive the liquid-transferring unit 100 to move up and down along the first direction Y.

Specifically, in an embodiment of the present invention, the driving portion 1111 is disposed on the first connecting seat 111, and the first lead screw 411 is driven to rotate by the displacement driving member 410, so as to drive the first connecting seat 111 to move up and down along the length direction (the first direction Y) of the first lead screw 411, and drive the driving portion 1111 to move up and down along the first direction Y, so that the driving portion 1111 can be matched with the driven portion 2131.

Specifically, in an embodiment of the present invention, the supporting unit 300 further includes a base 312 disposed on the first supporting frame 310, one end of the first connecting element 212 passes through the first supporting frame 310 and the base 312 in sequence and is connected to the fixing plate 215, and one end of the first elastic element 216 away from the shielding element 211 is connected to the base 312, so that the shielding element 211 can move below the pipetting unit 100 after the pipetting unit 100 completes the pipetting or filling operation by the elastic force of the first elastic element 216.

Specifically, in one embodiment of the present invention, as shown in fig. 1, 3 and 4, the pipetting unit 100 comprises a second support frame 110, a first connecting seat 111 is disposed on the second support frame 110, the first connecting seat 111 is connected to the second support frame 110, and the second support frame 110 is slidably connected with a first support frame 310, so that the pipetting unit 100 can slide back and forth along a first direction Y relative to a support unit 300.

As an alternative embodiment, as shown in fig. 1, a first slide rail 621 is disposed on the first support frame 310, and a first slide block 611 matched with the first slide rail 621 is disposed on the second support frame 110, so as to realize the sliding connection between the second support frame 110 and the first support frame 310.

Specifically, in one embodiment of the present invention, as shown in fig. 5 and 6, the pipetting unit 100 comprises a plurality of cannulas 121, a plurality of plungers 122 with one end sleeved in the corresponding cannulas 121, a plurality of pipette tips 123 connected to the corresponding cannulas 121, and a pipetting driver 420 for driving the plungers 122 to move in the cannulas 121. The liquid taking operation of the liquid transfer unit 100 comprises the following steps: the pipetting driver 420 drives the plunger 122 downwards into the casing 121, then the tip 123 is inserted into the target member and contacts the solution in the target member, and then the pipetting driver 420 drives the plunger 122 upwards, thereby completing the pipetting operation. The steps of the liquid injection operation of the liquid transfer unit 100 are as follows: after the pipetting operation is completed, the pipette tip 123 is placed on another target member, and then the pipetting driver 420 drives the plunger 122 downward into the cannula 121, thereby completing the pipetting operation.

Specifically, in an embodiment of the present invention, as shown in fig. 3 and 4, the pipetting unit 100 further includes a second fixing seat 113 disposed on the top of the second support frame 110 and used for mounting the pipetting driver 420, and the pipetting driver 420 is disposed on the second fixing seat 113, so that the pipetting driver 420 is disposed on the second support frame 110.

As an alternative embodiment of the present invention, as shown in fig. 3 and fig. 4, the liquid-transferring unit 100 further includes a second screw rod 421 connected to the liquid-transferring driving member 420, the liquid-transferring driving member 420 is a motor, the liquid-transferring unit 100 further includes a second connecting seat 112 connected to an end of the plunger 122 away from the casing 121, a second nut (not shown) in threaded fit with the second screw rod 421 is disposed on the second connecting seat 112, and the second screw rod 421 is driven by the liquid-transferring driving member 420 to rotate, so as to drive the plunger 122 to move up and down along the first direction Y.

Specifically, in an embodiment of the present invention, as shown in fig. 3, the second connecting seat 112 is slidably connected to the second support frame 110, such that the second connecting seat 112 can slide reciprocally in the first direction Y relative to the second support frame 110, thereby driving the plunger 122 to move up and down in the first direction Y, so as to perform a liquid taking or injecting operation.

As an alternative embodiment, as shown in fig. 3, a second sliding rail 622 is disposed on the second supporting frame 110, and a second sliding block 612 that is matched with the second sliding rail 622 is disposed on the second connecting seat 112, so as to realize the sliding connection between the second connecting seat 112 and the second supporting frame 110.

Specifically, in an embodiment of the present invention, as shown in fig. 2 and fig. 6, the pipetting unit 100 further includes a third fixing seat 114 fixedly connected to the second support frame 110, and a plurality of cannulas 121 are disposed in the third fixing seat 114, such that when the plunger 122 extends downward into the cannulas 121, the cannulas 121 can be stationary relative to the second support frame 110, so as to facilitate the liquid taking or filling operation.

Specifically, in an embodiment of the present invention, as shown in fig. 6, the pipetting unit 100 further includes a cover 124 and a second elastic member 125 respectively disposed on the plunger 122, the cover 124 and the second elastic member 125 are both located in the third fixing seat 114, wherein one end of the top cover extends into the sleeve, the second elastic member 125 is disposed on a side of the top cover away from the sleeve, one end of the second elastic member 125 abuts against the cover, the other end abuts against the third fixing seat 114, and the second elastic member 125 is in a compressed state, so as to achieve a buffering effect between the sleeve and the third fixing seat 114. In this embodiment, the second elastic member 125 may be, but is not limited to, a compression spring.

In particular, in one embodiment of the invention, the suction head 123 is removably connected to the sleeve, in particular, but not exclusively, by being snapped out of one end of the sleeve, so as to facilitate the exchange of the suction head 123. In the liquid-transfering platform of the embodiment of the invention, the suction head 123 needs to be replaced once after the liquid-transfering operation is performed in sequence, so that the accuracy of liquid-transfering every time can be ensured.

Further, as shown in fig. 6, the pipetting unit 100 further includes at least two connecting shafts with one end connected to the second connecting seat 112, and a detaching seat 126 connected to one end of the connecting shaft far away from the second connecting seat 112, wherein the detaching seat 126 is specifically located at one side of the third fixing seat 114, a through hole is formed in the detaching seat 126 corresponding to the sleeve, and one end of the sleeve close to the pipette tip 123 sequentially passes through the third fixing seat 114 and the detaching seat 126 and then is connected to the pipette tip 123. The second connecting base 112 is driven by the liquid-transfering driving member 420 to move along the first direction Y toward the direction close to the suction head 123, and drives the connecting shaft and the detaching base 126 thereon to move toward the direction close to the suction head 123, and the detaching base 126 pushes the suction head 123 to separate the suction head 123 from the sleeve, thereby quickly detaching the suction head 123. It is important to note that, in the use state, the tip 123 and the detaching base 126 have a certain space, so that the tip 123 does not fall off during the liquid taking or injecting operation of the liquid transferring unit 100.

The invention is not to be considered as limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A pipetting platform, comprising:

2. The pipetting platform of claim 1, wherein the shield unit comprises a shield disposed below the pipetting unit, the shield having a collection well formed therein for collecting the solution.

3. The pipetting platform of claim 2, wherein the pipetting platform further comprises a support unit, the pipetting unit is disposed on the support unit and can reciprocate relative to the support unit in a first direction, the shielding can reciprocate relative to the support unit in a second direction, and the first direction and the second direction are arranged at a predetermined included angle.

4. The pipetting platform of claim 3, wherein the shutter unit further comprises a first connector connected to the shutter and a follower connected to the first connector, the follower being provided on the follower, the first connector being provided on the support unit and being capable of reciprocating in a second direction relative to the support unit.

5. The pipetting platform of claim 4, wherein the shield unit further comprises a first elastic member sleeved on the first connector, and one end of the first connector, which is far away from the shield, passes through the support unit and is connected with the driven member; one end of the first elastic piece is connected with one end, close to the shielding piece, of the first connecting piece, and the other end of the first elastic piece is connected with the supporting unit.

6. A pipetting platform as recited in claim 3 further comprising a displacement drive member for driving the pipetting unit in the first direction, the displacement drive member being provided on the support unit.

7. Pipetting platform according to claim 3, characterized in that the driven part is provided with a connection surface for cooperation with the driving part, which connection surface has displacement components in the first direction and the second direction; alternatively, the first and second electrodes may be,

8. Pipetting platform according to claim 7, wherein the active part is provided with rollers for engaging with the attachment surface, the rollers being rotatable relative to the active part; alternatively, the first and second electrodes may be,

9. Pipetting platform according to claim 7 wherein the attachment surface is a bevel, a curve or a curved surface.

10. Pipetting platform according to any one of claims 1 to 9, characterized in that the pipetting unit comprises a cannula, a plunger with one end telescoped in the cannula, a tip connected to the cannula, and a pipetting drive for driving the plunger in movement in the cannula.