Pipette withdrawing device and pipetting workstation

Abstract

The utility model provides a pipettor gun withdrawing device and a pipetting workstation, and relates to the technical field of medical instruments. The pipette withdrawing device comprises a pipette withdrawing mechanism and a pipette fixing mechanism, the gun withdrawing mechanism comprises a power assembly and a gun withdrawing pin in transmission connection with the power assembly, and the power assembly can drive the gun withdrawing pin to ascend and descend. The pipette fixing mechanism comprises a fixing plate for mounting a pipette, a fixed pipette withdrawing hole extending in the height direction is formed in the fixing plate, the power assembly is fixedly connected to the fixing plate, a pipette withdrawing pin penetrates through the fixed pipette withdrawing hole and is in transmission connection with a pipette head of the pipette, and an included angle is formed between the pipette withdrawing pin and the pipette head; when the power assembly drives the gun withdrawing pin to descend, the gun withdrawing pin drives the gun head to withdraw the gun. The pipettor gun withdrawing device is convenient to maintain, the assembly difficulty is reduced, and interference between the gun withdrawing mechanism and the gun head and the pipettor can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a pipette gun retracting device and a pipetting workstation. Background Art

[0002] A pipette is an instrument used to quantitatively transfer liquids, usually in conjunction with a three-dimensional moving mechanism to quantitatively absorb and transfer liquids. In many application fields, especially in biological applications where micropipetting is commonly used, such as chemiluminometers, nucleic acid extractors, filling equipment, etc., due to the harmfulness of the liquid being transferred, difficulty in cleaning, or convenience considerations, it is usually necessary to use a disposable gun tip. Most existing pipetting devices integrate the gun retraction mechanism and the pipette, which makes maintenance more troublesome, and the gun retraction mechanism and the gun tip need to be highly coordinated to ensure the pipetting effect of the pipette and the gun retraction effect of the gun retraction mechanism, while avoiding interference with the gun tip and the pipette. Utility Model Content

[0003] The utility model aims to provide a pipette gun retracting device and a pipetting workstation. The pipette gun retracting device is easy to maintain, reduces assembly difficulty, and can avoid interference between the gun retracting mechanism and the gun head and the pipette.

[0004] To achieve this purpose, the utility model adopts the following technical solutions:

[0005] Pipette ejection device, comprising:

[0006] The gun-retracting mechanism comprises a power assembly and a gun-retracting pin which is transmission-connected to the power assembly, and the power assembly can drive the gun-retracting pin to rise and fall;

[0007] The pipette fixing mechanism comprises a fixing plate for mounting a pipette gun, the fixing plate is provided with a fixing gun withdrawal hole extending in the height direction, the power assembly is fixedly connected to the fixing plate, the gun withdrawal pin passes through the fixing gun withdrawal hole and is transmission-connected to the gun head of the pipette gun, and is arranged at an angle with the gun head;

[0008] When the power assembly drives the gun ejection pin to descend, the gun ejection pin drives the gun head to eject the gun.

[0009] As a further technical solution, the first end of the ejection pin is connected to the output end of the power assembly, and a ejection portion is provided on the side wall of the ejection pin near the second end, and the ejection portion is used to abut against the gun head. The second end of the ejection pin is conical, and the diameter gradually decreases towards the end.

[0010] 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.

[0011] As a further technical solution, the driving assembly includes a driving member, a screw rod and a connecting nut. The driving member is fixedly connected to the fixed plate, the screw rod is transmission connected to the driving member, the connecting nut is fixedly connected to the gun retracting block and is transmission connected to the screw rod, and the screw rod rotates forward and reversely to drive the gun retracting block to descend or rise.

[0012] As a further technical solution, the driving assembly includes a push rod motor, the push rod motor is fixedly connected to the fixing plate, and the motor shaft of the push rod motor is fixedly connected to the gun retracting block.

[0013] 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.

[0014] As a further technical solution, the pipette gun retraction device also includes an auxiliary sensing component, one end of which is fixedly connected to the gun retraction block and the other end extends upward. The position sensor senses the position of the auxiliary sensing component and sends a signal to the controller.

[0015] As a further technical solution, the pipette gun retracting device further includes a guide member, which is fixedly disposed on the fixed plate and is used to provide guidance for the movement of the gun retracting block.

[0016] As a further technical solution, the pipette gun retracting device further includes a fixing seat, which is fixedly connected to the fixing plate and is located below the gun retracting block.

[0017] The liquid transfer workstation comprises a frame, a liquid transfer working arm device and a liquid transfer gun retracting device. The liquid transfer working arm device is arranged on the frame, and the liquid transfer gun retracting device is installed on the liquid transfer working arm device.

[0018] Compared with the prior art, the pipette gun retracting device provided by the utility model has the following technical advantages:

[0019] Since the gun withdrawal mechanism is independently set, when the gun withdrawal mechanism needs to be maintained, there is no need to consider the pipette, and the gun withdrawal mechanism can be directly maintained, making the maintenance process relatively simple. In addition, it is only necessary to pass the gun withdrawal pin through the fixed gun withdrawal hole and connect it with the gun head at an angle to ensure the use effect of the gun withdrawal mechanism and the pipette, while ensuring that the gun withdrawal mechanism and the pipette are relatively independent and do not interfere with each other, and when withdrawing the gun, only the power assembly needs to drive the gun withdrawal pin to descend to achieve the gun withdrawal, which is simple and convenient. After the gun is withdrawn, the power assembly drives the gun withdrawal pin to rise so that the new gun head can be connected to the pipette. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view of the pipette gun retracting device provided by an embodiment of the utility model;

[0021] Figure 2 It is a structural schematic diagram of a pipette gun retracting device provided in an embodiment of the utility model;

[0022] Figure 3 This is a schematic structural diagram of a pipette gun retracting device provided by an embodiment of the utility model from another perspective;

[0023] Figure 4 It is a structural schematic diagram of a gun retracting mechanism in a pipette gun retracting device provided in an embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of a gun retracting block in a pipette gun retracting device provided in an embodiment of the utility model;

[0025] Figure 6 It is a structural schematic diagram of a gun retracting pin in a pipette gun retracting device provided in an embodiment of the utility model.

[0026] In the figure:

[0027] 100, gun retracting mechanism; 110, power assembly; 111, drive assembly; 1111, drive member; 1112, connecting nut; 1113, motor connecting plate; 112, gun retracting block; 1121, avoidance through hole; 120, gun retracting pin; 121, gun retracting part;

[0028] 210, fixing plate; 211, fixing gun withdrawal hole;

[0029] 310, position sensor; 320, auxiliary sensing element;

[0030] 400, guide member;

[0031] 500. Fixed seat. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Combination Figures 1 to 6 As shown, the pipette gun retracting device provided in this embodiment is used to connect the pipette gun, and after the pipetting is completed, the gun can be retracted. Specifically, the pipette gun retracting device includes: a gun retracting mechanism 100 and a pipette fixing mechanism; the gun retracting mechanism 100 includes a power assembly 110 and a gun retracting pin 120 that is transmission-connected to the power assembly 110, and the power assembly 110 drives the gun retracting pin 120 to rise and fall; the pipette fixing mechanism includes a fixed plate 210 for mounting the pipette gun, and the fixed plate 210 is provided with a long plate-shaped fixed gun retracting hole 211 extending in the height direction, the power assembly 110 is fixedly connected to the fixed plate 210, and the gun retracting pin 120 passes through the fixed gun retracting hole 211 and is transmission-connected to the gun head of the pipette gun, and is arranged at an angle with the gun head; when the power assembly 110 drives the gun retracting pin 120 to descend, the gun retracting pin 120 drives the gun head to retract the gun.

[0037] The pipette is installed on the fixed plate 210, 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 211. When the gun pin passes through the fixed gun withdrawal hole 211 and the pipette gun withdrawal hole, the gun withdrawal pin 120 abuts against the gun withdrawal platform.

[0038] Since the gun-retracting mechanism 100 is independently arranged, when the gun-retracting mechanism 100 needs to be maintained, there is no need to consider the pipette, and the gun-retracting mechanism 100 can be directly maintained, thereby making the maintenance process relatively simple. In addition, since the gun-retracting pin 120 passes through the fixed gun-retracting hole 211 and is connected to the gun head at an angle, while ensuring the respective use effects of the gun-retracting mechanism 100 and the pipette, it can be ensured that the gun-retracting mechanism 100 and the pipette are relatively independent and do not interfere with each other, and when retracting the gun, only the power assembly 110 needs to drive the gun-retracting pin 120 to descend to achieve the gun-retracting, and the gun-retracting is simple and convenient. After the gun is retracted, the power assembly 110 drives the gun-retracting pin 120 to rise so that a new gun head can be connected to the pipette. In order to further improve the gun-retracting effect, in this embodiment, the axis of the gun-retracting pin 120 is arranged perpendicular to the axis of the gun head.

[0039] Preferably, the first end of the gun withdrawal pin 120 is connected to the power assembly 110, and a gun withdrawal portion 121 is provided on the side wall of the gun withdrawal pin 120 near the second end, and the gun withdrawal portion 121 abuts against the gun head. The gun withdrawal portion 121 is set as a plane and abuts against the gun withdrawal platform to increase the contact area between the gun withdrawal pin 120 and the gun head, thereby further improving the stability of gun withdrawal. In this embodiment, two gun withdrawal portions 121 are provided, and both are set as planes, and the two gun withdrawal portions 121 are arranged opposite to each other in the height direction; the first end of the gun withdrawal pin 120 is threadedly connected to the power assembly 110. 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 120 is set as a conical surface, and the conical surface has a guiding function, guiding the gun withdrawal pin 120 to more accurately pass through the fixed gun withdrawal hole 211 and the pipetting gun withdrawal hole and abut against the gun head.

[0040] In the optional technical solution of this embodiment, the power assembly 110 includes a driving component 111 and a gun-retracting block 112 . The driving component 111 is fixedly connected to the fixed plate 210 , the gun-retracting block 112 is transmission-connected to the driving component 111 , and the gun-retracting pin 120 is fixedly connected to the gun-retracting block 112 .

[0041] Specific combination Figures 2 to 5 As shown, the pipette is installed in front of the fixed plate 210, the drive assembly 111 is fixedly connected to the back of the fixed plate 210 and is located above the fixed gun withdrawal hole 211, and the drive assembly 111 provides power for the rise and fall of the gun withdrawal pin 120; the gun withdrawal pin 120 is connected to the drive assembly 111 through the gun withdrawal block 112 to improve the connection stability between the gun withdrawal pin 120 and the drive assembly 111.

[0042] Preferably, the driving assembly 111 includes a driving member 1111, a screw rod and a connecting nut 1112. The driving member 1111 is fixedly connected to the fixed plate 210, the screw rod is transmission-connected to the driving member 1111, the connecting nut 1112 is fixedly connected to the gun retracting block 112 and is transmission-connected to the screw rod. The screw rod rotates forward and reversely to drive the gun retracting block 112 to descend or ascend.

[0043] Specific combination Figure 2 and Figure 5 As shown, the upper surface of the gun withdrawal block 112 is provided with an avoidance through hole 1121, and the connecting nut 1112 is fixedly connected to the gun withdrawal block 112 corresponding to the avoidance through hole 1121. The first end of the screw rod is transmission-connected to the driving member 1111, and the second end is transmission-connected to the connecting nut 1112. When the gun needs to be withdrawn, the driving member 1111 drives the screw rod to rotate forward, and the connecting nut 1112 brings the gun withdrawal block 112 down along the screw rod, so that the gun withdrawal pin 120 drives the gun head to withdraw the gun; when the gun withdrawal is completed, the driving member 1111 drives the screw rod to reverse, and the connecting nut 1112 brings the gun withdrawal block 112 up along the screw rod, so that the gun withdrawal pin 120 moves to the initial position, so as to facilitate the installation of a new gun head on the pipette gun. The avoidance through hole 1121 provides an avoidance space for the screw rod during the descent or ascent of the gun withdrawal block 112, so as to avoid interference between the screw rod and the gun withdrawal block 112.

[0044] In addition, in order to ensure the connection strength and connection stability when the driving member 1111 is connected to the fixing plate 210 , the driving member 1111 is fixedly connected to the fixing plate 210 via the motor connecting plate 1113 .

[0045] In another embodiment, the driving assembly 111 includes a push rod motor, which is fixedly connected to the fixed plate 210, and the motor shaft of the push rod motor is fixedly connected to the gun withdrawal block 112. When the driving assembly 111 is set as a push rod motor, there is no need to set an avoidance through hole 1121 on the gun withdrawal block 112, and the motor shaft of the push rod motor is directly fixedly connected to the gun withdrawal block 112, and the motor shaft extends in the height direction; when the push rod motor is set above the fixed gun withdrawal hole 211, the motor shaft is extended, the gun withdrawal block 112 and the gun withdrawal pin 120 are lowered to realize gun withdrawal, the motor shaft is retracted, and the gun withdrawal block 112 and the gun withdrawal pin 120 are raised to the starting position; when the push rod motor is set below the fixed gun withdrawal hole 211, the motor shaft is retracted, the gun withdrawal block 112 and the gun withdrawal pin 120 are lowered to realize gun withdrawal, the motor shaft is extended, and the gun withdrawal block 112 and the gun withdrawal pin 120 are raised to the starting position.

[0046] Preferably, the pipette gun retracting device further comprises a controller and a position sensor 310 . The position sensor 310 is disposed on the driving assembly 111 . The controller is control-connected to both the position sensor 310 and the driving assembly 111 .

[0047] Taking the drive assembly 111 as an example, the position sensor 310 is set on the drive 1111 to monitor the relative position of the gun withdrawal block 112 and transmit it to the controller. When the pipette gun completes a stage task, the controller sends a gun withdrawal signal to the drive 1111. After receiving the gun withdrawal signal, the drive 1111 starts to rotate forward, and the connecting nut 1112 brings the gun withdrawal block 112 down along the screw rod, so that the gun withdrawal pin 120 drives the gun head to withdraw the gun; when the gun withdrawal is completed, the drive 1111 drives the screw rod to reverse, and the connecting nut 1112 brings the gun withdrawal block 112 up along the screw rod. During the rising process, when the position sensor 310 senses the gun withdrawal block 112, it sends a stop signal to the controller. The controller receives the stop signal and controls the drive 1111 to stop running, thereby ensuring that the gun withdrawal pin 120 can accurately rise to the starting position to facilitate the connection of a new gun head.

[0048] Preferably, the pipette gun retracting device also includes an auxiliary sensing component 320, which is configured in a plate shape, one end of which is fixedly connected to the gun retracting block 112, and the other end of which extends upward. The position sensor 310 senses the position of the auxiliary sensing component 320 and sends a signal to the controller.

[0049] Specific combination Figures 2 to 4 As shown, the position sensor 310 is set as a photoelectric switch, and the auxiliary sensing element 320 is fixedly connected to the gun-retracting block 112, and rises and falls with the rise and fall of the gun-retracting block 112. When the gun-retracting is completed, the auxiliary sensing element 320 rises with the gun-retracting block 112. When the photoelectric switch senses the auxiliary sensing element 320, the photoelectric switch sends a stop signal to the controller, and the driving element 1111 stops operating. The auxiliary sensing element 320 cooperates with the photoelectric switch to improve the sensing accuracy of the position sensor 310.

[0050] In an optional technical solution of this embodiment, the pipette gun retracting device further includes a guide member 400, and the guide member 400 is fixedly disposed between the gun retracting block 112 and the fixing plate 210. Figure 1 and Figure 4 As shown, the gun withdrawing block 112 cooperates with the guide member 400 . During the rising and falling process of the gun withdrawing block 112 , the guide member 400 guides and limits the gun withdrawing block 112 , ensuring that the gun withdrawing block 112 always rises and falls in the vertical direction.

[0051] Preferably, the pipette gun retracting device further comprises a fixing seat 500, which is fixedly connected to the fixing plate 210 and is located below the gun retracting block 112. The fixing plate 210 is connected to the pipetting workstation through the fixing seat 500, so that the pipette gun and the pipette gun retracting device are installed on the pipetting workstation; at the same time, the fixing seat 500 has a certain limiting effect on the gun retracting block 112, so as to avoid the situation that the gun retracting pin 120 is damaged due to the gun retracting block 112 descending too far during the descending process.

[0052] The pipetting workstation comprises a frame, a pipetting working arm device and a pipette gun retracting device. The pipetting working arm device is arranged on the frame, and the pipette gun retracting device is installed on the pipetting working arm device.

[0053] Specifically, a carrier is provided on the upper surface of the frame for placing a container for containing a solution, a pipette working arm device is provided on the upper surface of the frame, and a pipette gun retracting device is installed on the pipette working arm device. During the working process, according to actual needs, the pipette working arm device operates to drive the pipette gun to perform pipetting; when the pipette gun completes a stage task, the gun retracting mechanism 100 drives the gun head to retract; when the gun retracting is completed, the gun retracting mechanism 100 rises to the starting position to facilitate the connection of a new gun head.

[0054] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A pipette gun retracting device, characterized in that: include: The gun-retracting mechanism (100) comprises a power assembly (110) and a gun-retracting pin (120) which is transmission-connected to the power assembly (110), and the power assembly (110) can drive the gun-retracting pin (120) to rise and fall; The pipette fixing mechanism comprises a fixing plate (210) for mounting a pipette, the fixing plate (210) being provided with a fixing gun withdrawal hole (211) extending in a height direction, the power assembly (110) being fixedly connected to the fixing plate (210), the gun withdrawal pin (120) passing through the fixing gun withdrawal hole (211) being transmission-connected to a gun head of the pipette, and being arranged at an angle to the gun head; When the power assembly (110) drives the gun ejection pin (120) to descend, the gun ejection pin (120) drives the gun head to eject.

2. The pipette gun retracting device according to claim 1, characterized in that: The first end of the ejection pin (120) is connected to the output end of the power assembly (110), and a ejection portion (121) is provided on the side wall of the ejection pin (120) close to the second end, and the ejection portion (121) is used to abut against the gun head. The second end of the ejection pin (120) is conical, and its diameter gradually decreases towards the end.

3. The pipette gun retracting device according to claim 1, characterized in that: The power assembly (110) comprises a driving component (111) and a gun-retracting block (112); the driving component (111) is fixedly connected to the fixing plate (210); the gun-retracting block (112) is transmission-connected to the driving component (111); and the gun-retracting pin (120) is fixedly connected to the gun-retracting block (112).

4. The pipette gun retracting device according to claim 3, characterized in that: The driving assembly (111) comprises a driving member (1111), a screw rod and a connecting nut (1112); the driving member (1111) is fixedly connected to the fixing plate (210); the screw rod is transmission-connected to the driving member (1111); the connecting nut (1112) is fixedly connected to the gun retracting block (112) and transmission-connected to the screw rod; the screw rod rotates forward and reversely to drive the gun retracting block (112) to descend or ascend.

5. The pipette gun retracting device according to claim 3, characterized in that: The driving assembly (111) comprises a push rod motor, the push rod motor is fixedly connected to the fixing plate (210), and the motor shaft of the push rod motor is fixedly connected to the gun retracting block (112).

6. The pipette gun retracting device according to any one of claims 3 to 5, characterized in that: The pipette gun retracting device further comprises a controller and a position sensor (310); the position sensor (310) is arranged at a fixed end of the drive assembly (111); and the controller is control-connected to both the position sensor (310) and the drive assembly (111).

7. The pipette gun retracting device according to claim 6, characterized in that: The pipette gun retracting device also includes an auxiliary sensing component (320), one end of which is fixedly connected to the gun retracting block (112), and the other end of which extends upward, and the position sensor (310) senses the position of the auxiliary sensing component (320) and sends a signal to the controller.

8. The pipette gun retracting device according to claim 6, characterized in that: The pipette gun retracting device further comprises a guide member (400), wherein the guide member (400) is fixedly arranged on the fixed plate (210) and is used to provide guidance for the movement of the gun retracting block (112).

9. The pipette gun retracting device according to claim 6, characterized in that: The pipette gun retracting device further comprises a fixing seat (500), wherein the fixing seat (500) is fixedly connected to the fixing plate (210) and is located below the gun retracting block (112).

10. A liquid handling workstation, characterized in that: It comprises a frame, a pipetting working arm device and the pipette gun retracting device according to any one of claims 1 to 9, wherein the pipetting working arm device is arranged on the frame, and the pipette gun retracting device is installed on the pipetting working arm device.

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