Pipetting workstation

Abstract

The utility model provides a pipetting workstation, and belongs to the technical field of medical instruments. The pipetting workstation comprises a rack, a pipetting mechanism and a carrier, the pipetting mechanism comprises an X-direction moving assembly, a Y-direction moving assembly and a Z-direction moving assembly, the X-direction moving assembly is movably connected to the rack in the X direction, the Z-direction moving assembly is fixedly connected to the X-direction moving assembly, the Y-direction moving assembly is movably connected to the Z-direction moving assembly in the Z direction, and the Y-direction moving assembly is used for installing a pipetting gun; the carrying frame is arranged on the machine frame through a supporting piece and located above the X-direction moving assembly. According to the pipetting workstation, the volume of the pipetting workstation can be reduced while multidirectional pipetting can be realized, and the space utilization rate of the rack is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a liquid transfer workstation. Background Art

[0002] In the process of genetic testing and embryo cultivation, liquid preparation and pipetting are required. Currently, pipetting is achieved through a pipetting workstation.

[0003] Existing pipetting workstations generally include a pipette gun and multiple pipetting arms, the pipette gun is installed on one of the pipetting arms for pipetting, and at least one pipetting arm is connected to a frame, and in order to facilitate pipetting, a carrier for placing containers is also provided on the frame. Although this pipetting device can achieve multi-directional liquid displacement, the entire pipetting workstation is large in size and has low space utilization of the frame. Utility Model Content

[0004] The utility model aims to provide a liquid transfer workstation, which can realize multi-directional liquid transfer while reducing the volume of the liquid transfer workstation and improving the space utilization rate of the frame.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] Liquid handling station, including:

[0007] frame;

[0008] The liquid transfer mechanism comprises an X-direction moving component, a Y-direction moving component and a Z-direction moving component, wherein the X-direction moving component is movably connected to the frame along the X-direction, the Z-direction moving component is fixedly connected to the X-direction moving component, the Y-direction moving component is movably connected to the Z-direction moving component along the Z-direction, and the Y-direction moving component is used to install a liquid transfer gun;

[0009] The carrier is arranged on the frame through a supporting member and is located above the X-direction moving component.

[0010] As a further technical solution, a guide limiter is arranged on the frame along the X direction, the X-direction moving component includes a moving pallet and a first power assembly, the moving pallet is slidably connected to the guide limiter, the first power assembly is transmission-connected to the moving pallet, the Z-direction moving component is fixedly connected to the moving pallet, and the support member is arranged above the moving pallet.

[0011] As a further technical solution, the first power assembly includes an X-driving member, an X-belt and an idler wheel, the idler wheel is rotatably connected to the mobile pallet, and the X-driving member and the idler wheel are arranged on the mobile pallet along a gap;

[0012] Both ends of the X belt are connected to the frame and are drivingly connected to the idler wheel and the output shaft of the X driving member.

[0013] As a further technical solution, the X-direction moving assembly further comprises two connecting plates, the two connecting plates are spaced apart on the frame along the X-direction, and the two ends of the X-belt are connected to the two connecting plates in a one-to-one correspondence.

[0014] As a further technical solution, the support member is configured as a fixed connecting plate, the fixed connecting plate is fixedly connected to the two connecting plates, the carrier is connected to the fixed connecting plate, and a plurality of openings for accommodating carriers are arranged at intervals on the carrier.

[0015] As a further technical solution, the pipetting workstation also includes a pipette gun retracting device, which is connected to the Y-direction moving component along the Y direction, and the pipette is connected to the Y-direction moving component through the pipette gun retracting device.

[0016] As a further technical solution, the pipette gun retracting device includes a gun retracting mechanism and a pipette fixing mechanism;

[0017] The gun-retracting mechanism comprises a second power assembly and a gun-retracting pin which is transmission-connected to the second power assembly, and the second power assembly can drive the gun-retracting pin to rise and fall;

[0018] The pipette fixing mechanism includes a fixing plate for mounting a pipette, the fixing plate is provided with a fixed gun withdrawal hole extending in the height direction, the second power assembly is fixedly connected to the fixing plate, the gun withdrawal pin passes through the fixed gun withdrawal hole and is transmission-connected to the gun head of the pipette, and is arranged at an angle to the gun head, when the second power assembly drives the gun withdrawal pin to descend, the gun withdrawal pin drives the gun head to withdraw the gun.

[0019] As a further technical solution, the first end of the ejection pin is connected to the output end of the second power assembly, and a ejection portion is provided on the side wall of the ejection pin close to the second end, and the ejection portion abuts against the gun head. The second end of the ejection pin is conical, and the diameter gradually decreases towards the end.

[0020] As a further technical solution, the power assembly includes a drive assembly and a gun withdrawal block, the drive assembly is fixedly connected to the fixed plate, the gun withdrawal block is transmission-connected to the drive assembly, and the gun withdrawal pin is fixedly connected to the gun withdrawal block.

[0021] As a further technical solution, the pipette gun retracting device also includes a controller and a position sensor, the position sensor is arranged at the fixed end of the driving component, and the controller is control-connected to both the position sensor and the driving component.

[0022] Compared with the prior art, the liquid transfer workstation provided by the utility model has the following technical advantages:

[0023] 1: Since a pipetting mechanism is provided in the pipetting workstation, a pipette gun used for pipetting is installed on the Y-direction moving component. When pipetting, the relative positions of the X-direction moving component, the Y-direction moving component and the Z-direction moving component and the rack can be changed according to the actual position of the container, so that the pipette gun can accurately move the target liquid into the target container, thereby realizing multi-directional adaptive pipetting.

[0024] 2: Since the carrier is arranged on the frame through the support and is located above the X-direction moving component, that is, the X-direction moving component is hidden under the support and the carrier, while the X-direction moving component drives the Z-direction moving component to reciprocate along the X-direction, the connection area after the X-direction moving component and the carrier are installed on the frame is reduced, thereby reducing the width of the frame, reducing the volume of the frame and the pipetting workstation, and improving the space utilization of the frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a liquid transfer workstation provided by an embodiment of the utility model;

[0026] Figure 2 This is a partial structural diagram of the liquid transfer workstation provided by the embodiment of the utility model. Figure 1 ;

[0027] Figure 3 This is a partial structural diagram of the liquid transfer workstation provided by the embodiment of the utility model. Figure 2 ;

[0028] Figure 4 This is a partial structural diagram of the liquid transfer workstation provided by the embodiment of the utility model. Figure 3 ;

[0029] Figure 5 It is a side view of a pipette gun retracting device in a pipetting workstation provided by an embodiment of the utility model;

[0030] Figure 6 It is a structural schematic diagram of a pipette gun retracting device in a pipetting workstation provided by an embodiment of the utility model;

[0031] Figure 7 This is a schematic structural diagram from another perspective of the pipette gun retracting device in the pipetting workstation provided by an embodiment of the utility model;

[0032] Figure 8 It is a structural schematic diagram of a gun retracting mechanism in a liquid transfer workstation provided by an embodiment of the utility model;

[0033] Fig. 9 It is a structural schematic diagram of a gun retracting block in a liquid transfer workstation provided by an embodiment of the utility model.

[0034] In the figure:

[0035] 100, frame; 110, guide limiter;

[0036] 210, X-direction moving assembly; 211, moving pallet; 212, first power assembly; 2121, X-driving member; 2122, X-belt; 2123, idler wheel; 213, connecting plate; 220, Y-direction moving assembly; 221, Y-slideway; 222, Y-driving member; 223, Y-screw rod; 224, mounting plate; 225, Y-sensor; 226, Y-auxiliary member; 230, Z-direction moving assembly; 231, Z-driving member; 232, Z-screw rod; 233, Z-slideway; 234, Z-belt; 235, Z-pulley; 236, Z-slideway;

[0037] 300, carrier; 310, opening; 320, carrier;

[0038] 400, support member;

[0039] 500, gun-retracting mechanism; 510, second power assembly; 511, driving assembly; 5111, gun-retracting driving member; 5112, connecting nut; 5113, motor connecting plate; 512, gun-retracting block; 5121, avoidance through hole; 520, gun-retracting pin; 521, gun-retracting part;

[0040] 610, fixing plate; 611, fixing gun withdrawal hole;

[0041] 710, position sensor; 720, auxiliary sensing element;

[0042] 800, guide member;

[0043] 900, fixed seat. DETAILED DESCRIPTION

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] Combination Figures 1 to 9 As shown, the pipetting workstation provided in this embodiment is used for transferring liquid to a target container during a medical operation. Specifically, the pipetting workstation includes a frame 100, a pipetting mechanism and a carrier 300; the pipetting mechanism includes an X-direction moving component 210, a Y-direction moving component 220 and a Z-direction moving component 230, the X-direction moving component 210 is movably connected to the upper surface of the frame 100 along the X direction, the Z-direction moving component 230 is fixedly connected to the X-direction moving component 210, the Y-direction moving component 220 is movably connected to the Z-direction moving component 230 along the Z direction, and the Y-direction moving component 220 is used to install a pipetting gun; the carrier 300 is arranged on the frame 100 and is located above the X-direction moving component 210.

[0049] Since a pipetting mechanism is provided in the pipetting workstation, a pipette gun for pipetting is installed on the Y-direction moving assembly 220. During pipetting, the relative positions of the X-direction moving assembly 210, the Y-direction moving assembly 220 and the Z-direction moving assembly 230 and the frame 100 can be changed according to the actual position of the container, so that the pipette gun can accurately move the target liquid into the target container, thereby realizing multi-directional adaptive pipetting.

[0050] Since the carrier 300 is arranged on the frame 100 through the support member 400 and is located above the X-direction moving assembly 210, that is, the X-direction moving assembly 210 is hidden below the support member 400 and the carrier 300, while the X-direction moving assembly 210 drives the Z-direction moving assembly 230 to reciprocate along the X-direction, the connection area after the X-direction moving assembly 210 and the carrier 300 are installed on the frame 100 is reduced, thereby reducing the width of the frame 100, reducing the volume of the frame 100 and the pipetting workstation, and improving the space utilization rate of the frame 100.

[0051] In the optional technical solution of this embodiment, a guide limiter 110 is arranged on the frame 100 along the X direction, the X-direction moving component 210 includes a moving pallet 211 and a first power assembly 212, the moving pallet 211 is slidably connected to the guide limiter 110, the first power assembly 212 is transmission-connected to the moving pallet 211, the Z-direction moving component 230 is fixedly connected to the moving pallet 211, and the carrier 300 is arranged above the moving pallet 211.

[0052] Specific combination Figure 2 and Figure 4 As shown, two guide limit members 110 are arranged on the frame 100 at intervals along the Y direction, and the two guide limit members 110 are both arranged as slide rails extending along the X direction. Two slide grooves are correspondingly arranged on the bottom wall of the movable pallet 211, and the two slide grooves are slidably matched with the two slide rails in a one-to-one correspondence. The Z-direction moving component 230 is connected to the movable pallet 211, and the first power assembly 212 drives the movable pallet 211 to move on the slide rails along the X direction.

[0053] Specifically, the first power assembly 212 includes an X-drive member 2121, an X-belt 2122 and an idler wheel 2123, the idler wheel 2123 is rotatably connected to the movable pallet 211, and the X-drive member 2121 and the idler wheel 2123 are spaced apart on the movable pallet 211 along the Y direction; both ends of the X-belt 2122 are connected to the frame 100, and are sequentially transmission-connected to the idler wheel 2123 and the output shaft of the X-drive member 2121. In order to improve the movement stability of the X-direction moving component 210, in this embodiment, two idler wheels 2123 are provided, and the two idler wheels 2123 are connected to the moving pallet 211 by rotation at intervals along the X-direction, and the two idler wheels 2123 are arranged near one of the slide rails, and the X-driving member 2121 is arranged on the moving pallet 211 corresponding to the gap between the two idler wheels 2123, and both ends of the X-belt 2122 are connected to the frame 100, and the middle part of the X-belt 2122 successively passes around one of the idler wheels 2123, the output shaft of the X-driving member 2121 and the other idler wheel 2123, and is transmission-connected with both the two idler wheels 2123 and the output shaft; with the forward and reverse rotation of the output shaft of the X-driving member 2121, the two idler wheels 2123 are rotated forward and reversely through the movement of the X-belt 2122, thereby changing the position of the X-belt 2122 cooperating with the two idler wheels 2123 and the output shaft, so as to realize the reciprocating movement of the moving pallet 211 on the slide rail along the X-direction.

[0054] In some other embodiments, two idler wheels 2123 may be staggered and arranged on the movable support plate 211. Alternatively, only one idler wheel 2123 may be provided, and both ends of the X belt 2122 are connected to the frame 100, and the middle portion of the X belt 2122 passes around the idler wheel 2123 and the output shaft of the X driving member 2121 in sequence.

[0055] Preferably, the X-direction moving assembly 210 further includes two connecting plates 213 , which are spaced apart on the frame 100 along the X-direction, and both ends of the X-belt 2122 are connected to the two connecting plates 213 in a one-to-one correspondence.

[0056] Specific combination Figure 2 and Figure 4 As shown, two connecting plates 213 are arranged at intervals on the frame 100. On the one hand, it is convenient for both ends of the X belt 2122 to be connected to the frame 100 through the corresponding connecting plates 213, thereby ensuring the connection effect of the X belt 2122 to the frame 100, thereby ensuring the operation stability of the X-direction moving component 210; on the other hand, the two connecting plates 213 have a limiting effect on the moving pallet 211, thereby ensuring that the moving pallet 211 slides back and forth between the two connecting plates 213, thereby preventing the moving pallet 211 from slipping off the frame 100.

[0057] Preferably, the support member 400 is configured as a fixed connecting plate, which is fixedly connected to the two connecting plates 213 , and the carrier 300 is connected to the fixed connecting plate. The carrier 300 is provided with a plurality of openings 310 for accommodating the carriers 320 at intervals.

[0058] Specific combination Figures 1 to 4 As shown, the fixed connecting plate is fixedly connected to the two connecting plates 213, so that an escape space is formed between the fixed connecting plate and the frame 100, so that the guide limiter 110 and the movable support plate 211 are conveniently arranged in the escape space, and the operation effect of the X-direction moving assembly 210 is ensured, while the carrier 300 is connected to the fixed connecting plate, so that the space above the frame 100 is fully utilized, and the X-direction moving assembly 210 is prevented from interfering with the carrier 300. A plurality of openings 310 are arranged at intervals on the carrier 300, and corresponding containers can be placed in the openings 310 according to actual pipetting requirements.

[0059] In some other embodiments, the support member 400 may not be provided, and the length of the carrier 300 may be lengthened so that both ends of the carrier 300 are directly connected to the two connecting plates 213 .

[0060] In addition, in the present embodiment, the specific structure of the Z-direction moving component 230 is as follows: one end of the Z slide rail 233 is fixedly connected to the moving pallet 211, and the other end extends along the Z direction; the Z driving member 231 is fixedly connected to the top of the Z slide rail 233; two Z pulleys 235 are provided, one of which is transmission-connected to the output shaft of the Z driving member 231, and the other Z pulley 235 is connected to the first end of the Z screw rod 232; the two Z pulleys 235 are transmission-connected by a Z belt 234; the second end of the Z screw rod 232 extends along the Z direction toward the moving pallet 211; the Z slide plate 236 is transmission-connected to the Z screw rod 232 and is slidingly connected to the Z slide rail 233; and the Y-direction moving component 220 is fixedly connected to the Z slide plate 236. When the relative position of the pipetting mechanism in the Z direction needs to be adjusted, the Z driving member 231 is started, and as the output shaft of the Z driving member 231 rotates forward or reversely, the Z screw rod 232 is driven to rotate forward or reversely, thereby driving the Z slide plate 236 to rise or fall, thereby driving the Y-direction moving component 220 to change its relative position in the Z direction. In this embodiment, in order to further reduce the volume of the Z-direction moving component 230 and reduce the spatial volume of the pipetting workstation, the Z driving member 231 and the Z screw rod 232 are connected by a Z pulley 235 and a Z belt 234. In other embodiments, the output shaft of the Z driving member 231 can be directly connected to the Z screw rod 232.

[0061] The specific structure of the Y-direction moving assembly 220 is as follows: one end of the Y-slide rail 221 is fixedly connected to the Z-slide plate 236, and the other end extends along the Y-direction; the Y-driving member 222 is fixedly connected to the Y-slide rail 221 and is arranged close to the Z-slide plate 236; one end of the Y-screw rod 223 is transmission-connected to the Y-driving member 222, and the other end extends in the Y-direction away from the Z-slide plate 236; the mounting plate 224 is transmission-connected to the Y-screw rod 223, and the liquid transfer gun is mounted on the mounting plate 224. When the relative position of the liquid transfer mechanism in the Y-direction needs to be adjusted, the Y-driving member 222 is started, and as the output shaft of the Y-driving member 222 rotates forward or reversely, the Y-screw rod 223 is driven to rotate forward or reversely, thereby driving the mounting plate 224 to reciprocate along the Y-direction, thereby driving the liquid transfer gun to change its relative position in the Y-direction. In addition, a Y sensor 225 is provided on the Y driving member 222, and the Y direction moving assembly 220 further includes a Y controller. The Y sensor 225 is set as a first position sensor. The Y controller is controlled and connected with the first position sensor and the Y driving member 222. A Y auxiliary member 226 is provided on the mounting plate 224. When the Y driving member 222 drives the mounting plate 224 to slide in a direction close to the Z sliding plate 236, when the first position sensor senses the Y auxiliary member 226, a stop signal is sent, and the Y controller receives the stop signal and controls the Y driving member 222 to stop running. The first position sensor and the Y auxiliary member 226 cooperate with each other to improve the operation accuracy of the Y direction moving assembly 220.

[0062] Preferably, the pipetting workstation further comprises a pipette gun retracting device, which is connected to the Y-direction moving assembly 220 in a Y-direction transmission manner, and the pipette gun is connected to the Y-direction moving assembly 220 through the pipette gun retracting device. The pipette gun retracting device is fixedly connected to the mounting plate 224, and the pipette gun is connected to the pipette gun retracting device. During the pipetting process, the X-direction moving assembly 210, the Y-direction moving assembly 220 and the Z-direction moving assembly 230 cooperate with each other to achieve multi-directional adaptive pipetting. The specific pipette gun retracting device includes: a gun retracting mechanism 500 and a pipette fixing mechanism; the gun retracting mechanism 500 includes a second power assembly 510 and a gun retracting pin 520 which is transmission-connected to the second power assembly 510, and the second power assembly 510 drives the gun retracting pin 520 to rise and fall; the pipette fixing mechanism includes a fixed plate 610 for mounting a pipette, and a long plate-shaped fixed gun retracting hole 611 extending in the height direction is provided on the fixed plate 610, and the second power assembly 510 is fixedly connected to the fixed plate 610, and the gun retracting pin 520 passes through the fixed gun retracting hole 611 and is transmission-connected to the gun head of the pipette, and is arranged at an angle to the gun head; when the second power assembly 510 drives the gun retracting pin 520 to descend, the gun retracting pin 520 drives the gun head to retract the gun.

[0063] The pipette is installed on the fixed plate 610, and the gun head is detachably connected to the pipette. A gun withdrawal platform (not shown in the figure) is arranged on the gun head. A pipette gun withdrawal hole is arranged on the pipette corresponding to the fixed gun withdrawal hole 611. When the gun pin passes through the fixed gun withdrawal hole 611 and the pipette gun withdrawal hole, the gun withdrawal pin 520 abuts against the gun withdrawal platform.

[0064] Since the gun-retracting mechanism 500 is independently arranged, when the gun-retracting mechanism 500 needs to be maintained, there is no need to consider the liquid-removing gun, and the gun-retracting mechanism 500 can be directly maintained, thereby making the maintenance process relatively simple. In addition, since the gun-retracting pin 520 passes through the fixed gun-retracting hole 611 and is connected to the gun head at an angle, while ensuring the respective use effects of the gun-retracting mechanism 500 and the liquid-removing gun, it can be ensured that the gun-retracting mechanism 500 and the liquid-removing gun are relatively independent and do not interfere with each other, and when retracting the gun, only the second power assembly 510 needs to drive the gun-retracting pin 520 to descend to achieve the gun-retracting, and the gun-retracting is simple and convenient. After the gun is retracted, the second power assembly 510 drives the gun-retracting pin 520 to rise, so that the new gun head can be connected to the liquid-removing gun. In order to further improve the gun-retracting effect, in this embodiment, the axis of the gun-retracting pin 520 is arranged perpendicular to the axis of the gun head.

[0065] Preferably, the first end of the gun withdrawal pin 520 is connected to the second power assembly 510, and a gun withdrawal portion 521 is provided on the side wall of the gun withdrawal pin 520 near the second end, and the gun withdrawal portion 521 abuts against the gun head. The gun withdrawal portion 521 is set as a plane and abuts against the gun withdrawal platform to increase the contact area between the gun withdrawal pin 520 and the gun head, thereby further improving the stability of gun withdrawal. In this embodiment, two gun withdrawal portions 521 are provided, and both are set as planes, and the two gun withdrawal portions 521 are arranged opposite to each other in the height direction; the first end of the gun withdrawal pin 520 is threadedly connected to the second power assembly 510. In some other embodiments, it can also be set as an interference fit, welding or bonding. The end face of the second end of the gun withdrawal pin 520 is set as a conical surface, and the conical surface has a guiding function, guiding the gun withdrawal pin 520 to more accurately pass through the fixed gun withdrawal hole 611 and the liquid transfer gun withdrawal hole and abut against the gun head.

[0066] In the optional technical solution of this embodiment, the second power assembly 510 includes a driving component 511 and a gun-retracting block 512 , the driving component 511 is fixedly connected to the fixed plate 610 , the gun-retracting block 512 is transmission-connected to the driving component 511 , and the gun-retracting pin 520 is fixedly connected to the gun-retracting block 512 .

[0067] Specific combination Figures 5 to 7 As shown, the pipette is installed in front of the fixed plate 610, the drive assembly 511 is fixedly connected to the back of the fixed plate 610 and is located above the fixed gun withdrawal hole 611, and the drive assembly 511 provides power for the rise and fall of the gun withdrawal pin 520; the gun withdrawal pin 520 is connected to the drive assembly 511 through the gun withdrawal block 512 to improve the connection stability between the gun withdrawal pin 520 and the drive assembly 511.

[0068] Preferably, the driving assembly 511 includes a gun-retracting driving member 5111, a screw and a connecting nut 5112. The gun-retracting driving member 5111 is fixedly connected to the fixed plate 610, the screw is transmission-connected to the gun-retracting driving member 5111, the connecting nut 5112 is fixedly connected to the gun-retracting block 512 and is transmission-connected to the screw. The screw rotates forward and reversely to drive the gun-retracting block 512 to descend or ascend.

[0069] Specific combination Figure 6 As shown, the upper surface of the gun-retracting block 512 is provided with an avoidance through hole 5121, and the connecting nut 5112 is fixedly connected to the gun-retracting block 512 corresponding to the avoidance through hole 5121. The first end of the screw rod is transmission-connected to the gun-retracting driving member 5111, and the second end is transmission-connected to the connecting nut 5112. When the gun needs to be retracted, the gun-retracting driving member 5111 drives the screw rod to move forward, and the connecting nut 5112 brings the gun-retracting block 512 down along the screw rod, so that the gun-retracting pin 520 drives the gun head to retract the gun; when the gun is retracted, the gun-retracting driving member 5111 drives the screw rod to reverse, and the connecting nut 5112 brings the gun-retracting block 512 up along the screw rod, so that the gun-retracting pin 520 moves to the initial position, so as to facilitate the installation of a new gun head on the pipette gun. The avoidance through hole 5121 provides an avoidance space for the screw rod during the descent or ascent of the gun-retracting block 512, so as to avoid interference between the screw rod and the gun-retracting block 512.

[0070] In addition, in order to ensure the connection strength and connection stability when the gun-retracting driving member 5111 is connected to the fixing plate 610 , the gun-retracting driving member 5111 is fixedly connected to the fixing plate 610 via the motor connecting plate 5113 .

[0071] In another embodiment, the driving assembly 511 includes a push rod motor, which is fixedly connected to the fixed plate 610, and the motor shaft of the push rod motor is fixedly connected to the gun-retracting block 512. When the driving assembly 511 is set as a push rod motor, there is no need to set an avoidance through hole 5121 on the gun-retracting block 512, and the motor shaft of the push rod motor is directly fixedly connected to the gun-retracting block 512, and the motor shaft extends in the height direction; when the push rod motor is set above the fixed gun-retracting hole 611, the motor shaft is extended, the gun-retracting block 512 and the gun-retracting pin 520 are lowered to realize gun-retracting, the motor shaft is retracted, and the gun-retracting block 512 and the gun-retracting pin 520 are raised to the starting position; when the push rod motor is set below the fixed gun-retracting hole 611, the motor shaft is retracted, the gun-retracting block 512 and the gun-retracting pin 520 are lowered to realize gun-retracting, the motor shaft is extended, and the gun-retracting block 512 and the gun-retracting pin 520 are raised to the starting position.

[0072] Preferably, the pipette gun retracting device further comprises a controller and a position sensor 710 . The position sensor 710 is disposed on the driving assembly 511 . The controller is control-connected to both the position sensor 710 and the driving assembly 511 .

[0073] Taking the driving assembly 511 as an example, the position sensor 710 is set on the gun-retracting driving member 5111 to monitor the relative position of the gun-retracting block 512 and transmit it to the controller. When the pipette gun completes a stage task, the controller sends a gun-retracting signal to the gun-retracting driving member 5111. After receiving the gun-retracting signal, the gun-retracting driving member 5111 starts to rotate forward, and the connecting nut 5112 brings the gun-retracting block 512 down along the screw rod, so that the gun-retracting pin 520 drives the gun head to retract the gun; when the gun-retracting is completed, the gun-retracting driving member 5111 drives the screw rod to reverse, and the connecting nut 5112 brings the gun-retracting block 512 to rise along the screw rod. During the rising process, when the position sensor 710 senses the gun-retracting block 512, it sends a stop signal to the controller. The controller receives the stop signal and controls the gun-retracting driving member 5111 to stop running, thereby ensuring that the gun-retracting pin 520 can accurately rise to the starting position to facilitate the connection of a new gun head.

[0074] Preferably, the pipette gun retracting device also includes an auxiliary sensing member 720, which is configured in a plate shape, one end of which is fixedly connected to the gun retracting block 512, and the other end of which extends upward. The position sensor 710 senses the position of the auxiliary sensing member 720 and sends a signal to the controller.

[0075] Specific combination Figures 6 to 8 As shown, the position sensor 710 is configured as a photoelectric switch, and the auxiliary sensing element 720 is fixedly connected to the gun-retracting block 512, and rises and falls with the rise and fall of the gun-retracting block 512. When the gun-retracting is completed, the auxiliary sensing element 720 rises with the gun-retracting block 512. When the photoelectric switch senses the auxiliary sensing element 720, the photoelectric switch sends a stop signal to the controller, and the gun-retracting driving element 5111 stops operating. The auxiliary sensing element 720 cooperates with the photoelectric switch to improve the sensing accuracy of the position sensor 710.

[0076] In an optional technical solution of this embodiment, the pipette gun retracting device further includes a guide member 800, and the guide member 800 is fixedly disposed between the gun retracting block 512 and the fixing plate 610. Figure 8 As shown, the gun withdrawing block 512 cooperates with the guide member 800 for guiding. During the rising and falling process of the gun withdrawing block 512 , the guide member 800 guides and limits the gun withdrawing block 512 , ensuring that the gun withdrawing block 512 always rises and falls in the vertical direction.

[0077] Preferably, the pipette gun retracting device further comprises a fixing seat 900, which is fixedly connected to the fixing plate 610 and is located below the gun retracting block 512. The fixing plate 610 is connected to the mounting plate 224 through the fixing seat 900, so that the pipette gun and the pipette gun retracting device can be installed on the pipetting workstation; at the same time, the fixing seat 900 has a certain limiting effect on the gun retracting block 512, so as to avoid the gun retracting pin 520 from being damaged due to the gun retracting block 512 descending too far during the descending process.

[0078] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pipetting workstation, characterized in that: include: Rack(100); A liquid transfer mechanism, comprising an X-direction moving component (210), a Y-direction moving component (220) and a Z-direction moving component (230), wherein the X-direction moving component (210) is movably connected to the frame (100) along the X-direction, the Z-direction moving component (230) is fixedly connected to the X-direction moving component (210), the Y-direction moving component (220) is movably connected to the Z-direction moving component (230) along the Z-direction, and the Y-direction moving component (220) is used to install a liquid transfer gun; A carrier (300), wherein the carrier (300) is arranged on the frame (100) via a support member (400) and is located above the X-direction moving component (210).

2. The liquid handling workstation according to claim 1, characterized in that: A guide stopper (110) is arranged on the frame (100) along the X direction; the X-direction moving assembly (210) comprises a moving support plate (211) and a first power assembly (212); the moving support plate (211) is slidably connected to the guide stopper (110); the first power assembly (212) is transmission-connected to the moving support plate (211); the Z-direction moving assembly (230) is fixedly connected to the moving support plate (211); and the support member (400) is arranged above the moving support plate (211).

3. The liquid handling workstation according to claim 2, characterized in that: The first power assembly (212) comprises an X-driving member (2121), an X-belt (2122) and an idler wheel (2123), wherein the idler wheel (2123) is rotatably connected to the movable support plate (211), and the X-driving member (2121) and the idler wheel (2123) are arranged on the movable support plate (211) at intervals; Both ends of the X belt (2122) are connected to the frame (100), and are drivingly connected to the idler wheel (2123) and the output shaft of the X driving member (2121).

4. The liquid handling workstation according to claim 3, characterized in that: The X-direction moving assembly (210) further comprises two connecting plates (213), the two connecting plates (213) being arranged on the frame (100) at intervals along the X-direction, and the two ends of the X-belt (2122) being connected to the two connecting plates (213) in a one-to-one correspondence.

5. The liquid handling workstation according to claim 4, characterized in that: The support member (400) is configured as a fixed connecting plate, the fixed connecting plate is fixedly connected to the two connecting plates (213), the carrier (300) is connected to the fixed connecting plate, and a plurality of openings (310) for accommodating carriers (320) are arranged at intervals on the carrier (300).

6. The liquid handling workstation according to any one of claims 1 to 5, characterized in that: The pipetting workstation further comprises a pipette gun retracting device, wherein the pipette gun retracting device is connected to the Y-direction moving component (220), and the pipette gun is connected to the Y-direction moving component (220) via the pipette gun retracting device.

7. The liquid handling workstation according to claim 6, characterized in that: The pipette gun retracting device comprises a gun retracting mechanism (500) and a pipette fixing mechanism; The gun-retracting mechanism (500) comprises a second power assembly (510) and a gun-retracting pin (520) connected to the second power assembly (510) by transmission, and the second power assembly (510) can drive the gun-retracting pin (520) to rise and fall; The pipette fixing mechanism comprises a fixing plate (610) for mounting a pipette, the fixing plate (610) being provided with a fixing gun withdrawal hole (611) extending in a height direction, the second power assembly (510) being fixedly connected to the fixing plate (610), the gun withdrawal pin (520) passing through the fixing gun withdrawal hole (611) being transmission-connected to a gun head of the pipette, and being arranged at an angle to the gun head, and when the second power assembly (510) drives the gun withdrawal pin (520) to descend, the gun withdrawal pin (520) drives the gun head to withdraw the gun.

8. The liquid handling workstation according to claim 7, characterized in that: The first end of the ejection pin (520) is connected to the output end of the second power assembly (510), and a ejection portion (521) is provided on the side wall of the ejection pin (520) close to the second end, and the ejection portion (521) is used to abut against the gun head. The second end of the ejection pin (520) is conical, and its diameter gradually decreases towards the end.

9. The liquid handling workstation according to claim 7, characterized in that: The second power assembly (510) comprises a driving component (511) and a gun-retracting block (512); the driving component (511) is fixedly connected to the fixing plate (610); the gun-retracting block (512) is transmission-connected to the driving component (511); and the gun-retracting pin (520) is fixedly connected to the gun-retracting block (512).

10. The liquid handling workstation according to claim 9, characterized in that: The pipette gun retracting device further comprises a controller and a position sensor (710), wherein the position sensor (710) is arranged at a fixed end of the driving component (511), and the controller is control-connected to both the position sensor (710) and the driving component (511).

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