CN218012821U

CN218012821U - Pipettor structure

Info

Publication number: CN218012821U
Application number: CN202222156290.1U
Authority: CN
Inventors: 邱宇; 林世起
Original assignee: Pudun Fluid Technology Shenzhen Co ltd
Current assignee: Pudun Fluid Technology Shenzhen Co ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-12-13
Anticipated expiration: 2032-08-16

Abstract

The utility model discloses a pipettor structure relates to the pipettor field, including the installation support plate, the side movable mounting of installation support plate has the motor mounting panel, the top side movable mounting of motor mounting panel has step screw motor, the bottom side movable mounting of motor mounting panel has the plunger cavity, movable mounting has first photoelectric switch in the plunger cavity, the side movable mounting of plunger cavity has the second photoelectric switch, the bottom side movable mounting of plunger cavity has the runner to change the joint block, the bottom side movable mounting that fixed mounting had on the runner changes the joint block has the suction head to unload the support plate, the bottom side movable mounting that the support plate was unloaded to the suction head has the suction head to load the head. The utility model discloses, uninstallation liquid-transfering suction head mechanism is integrated on inhaling the flowing back stroke, and only one set of drive mechanism can accomplish and inhale flowing back and uninstallation suction head function, and simple structure, small, low cost increase a suction head and pack into the detection function, adopt the rifle head to load the head not at the center, and skew one side scheme realizes the market demand of pair interval 9 mm.

Description

Pipettor structure

Technical Field

The utility model relates to a pipettor technical field especially relates to a pipettor structure.

Background

A liquid transfer device, also called a pipette gun, is a device for quantitatively transferring liquid. In conducting analytical testing studies, small or minute amounts of liquid are typically removed using a pipette. Pipettors can be divided into gas piston pipettors and external piston pipettors according to the principle.

Among the prior art, move liquid suction head can not the automatic discharge or need the supplementary uninstallation of other mechanism to move liquid suction head, deep hole board interval 9mm on the market, when going to design the pipettor according to the 9mm structure, the minimum design demand that can not satisfy the pipettor structure of 9mm motor torque consequently needs a pipettor structure to satisfy people's demand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pipettor structure to the liquid-transfering suction head that proposes in solving above-mentioned background art can not automatic uninstallation or need the supplementary uninstallation of other mechanism liquid-transfering suction head, deep hole board interval 9mm on the market, when going to design the pipettor according to the 9mm structure, the problem that the design demand of pipettor structure can not be satisfied to the 9mm motor moment is minimum.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a pipettor structure, includes the mounting panel, the side movable mounting of mounting panel has the motor mounting panel, and the top side movable mounting of motor mounting panel has drive structure, the bottom side movable mounting of motor mounting panel has base structure, and movable mounting has connection structure between drive structure and the base structure.

Preferably, the connecting structure comprises a protective cover, and the protective cover is movably arranged on the side surface of the mounting bracket plate.

Preferably, the inner wall of the protective cover is movably provided with a linear slide rail, the linear slide rail is movably provided with a plunger push plate, and one end of the screw rod is movably arranged on the plunger push plate.

Preferably, the bottom side of the plunger push plate is movably provided with a plunger rod, the bottom side of the plunger rod is movably provided with a cavity cover plate, and the cavity cover plate is movably provided with a first O-shaped sealing ring and a sealing ring.

Preferably, the base structure comprises a plunger cavity, the plunger cavity is movably mounted at the bottom side of the protective cover, a first photoelectric switch is movably mounted in the plunger cavity, a second photoelectric switch is movably mounted at the side surface of the plunger cavity, a runner transfer block is movably mounted at the bottom side of the plunger cavity, a suction head unloading support plate is movably mounted at the bottom side fixedly mounted on the runner transfer block, and a suction head loading head is movably mounted at the bottom side of the suction head unloading support plate.

Preferably, one end of a retaining spring is fixedly mounted at the bottom side of the plunger cavity, the other end of the retaining spring is fixedly mounted at the top side of the suction head unloading plate, a second optical coupling blocking piece is movably mounted at the bottom side of the plunger pushing plate and is matched with the suction head unloading plate, an interface and a flow channel are movably mounted on the inner wall of the plunger cavity, a second O-shaped sealing ring is movably mounted at the bottom end of the cavity cover plate, and the interface and the flow channel are matched with the second O-shaped sealing ring.

Preferably, the drive structure includes step screw motor, step screw motor movable mounting is on the top side of protection casing, and step screw motor's bottom side movable mounting has the lead screw, and the one end of lead screw extends to the inside of protection casing, and movable mounting has holding screw on the plunger push pedal, holding screw and lead screw looks adaptation.

The utility model has the advantages that:

the utility model discloses in, uninstallation liquid-transfering suction head mechanism is integrated on inhaling the flowing back stroke, only one set of drive mechanism can accomplish and inhale flowing back and uninstallation suction head function, simple structure, small, low cost increase a suction head and pack into the detection function.

The utility model discloses in, adopt rifle head loading head not at the center, skew one side scheme realizes pair interval 9 mm's market demand.

Drawings

Fig. 1 is a schematic perspective view of a pipette structure according to the present invention;

fig. 2 is a schematic view of an internal structure of a pipette structure according to the present invention;

fig. 3 is a schematic side view of a structure of a pipette according to the present invention;

fig. 4 is the utility model provides a structural schematic diagram of a section of a pipettor structure.

In the figure: 1. mounting a support plate; 2. a motor mounting plate; 3. a first photoelectric switch; 4. a stepping screw motor; 5. a seal ring; 6. a linear slide rail; 7. an interface; 8. a plunger push plate; 9. a second photoelectric switch; 10. a second optical coupler catch; 11. a screw rod; 12. a protective cover; 13. a plunger rod; 14. a flow channel; 15. a plunger cavity; 16. a cavity cover plate; 17. the suction head unloads the carrier plate; 18. a runner transfer block; 19. a sucker ejector rod; 20. a suction head loading head; 21. a set screw; 22. a first O-ring seal; 23. a retention spring; 24. and a second O-shaped sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-4, a pipettor structure, including installation supporting plate 1, the side movable mounting of installation supporting plate 1 has motor mounting panel 2, the top side movable mounting of motor mounting panel 2 has drive structure, the bottom side movable mounting of motor mounting panel 2 has base structure, movable mounting has connection structure between drive structure and the base structure, step screw motor clockwise rotation drives the screw rod upwards to move, the screw rod is fixed in the plunger push pedal through holding screw simultaneously, the plunger rod upwards moves, because the plunger cavity, the sealing washer forms airtight space with first O type rubber circle, form the vacuum in the die cavity, through runner switching piece and suction head that the suction head loading head is connected, accomplish the imbibition action. The stepping screw motor rotates anticlockwise, the plunger rod moves downwards, and liquid in the liquid-transfering suction head is discharged.

Step-by-step lead screw motor continues anticlockwise rotation, and the first opto-coupler separation blade that is fixed in the plunger push pedal moves down together, triggers until a photoelectric switch sensor, and the pipettor has accomplished the liquid-moving action this moment, begins to carry out the liquid-moving suction head uninstallation. And the stepping screw rod motor continues to rotate anticlockwise, the plunger push plate continues to move downwards to push the suction head ejector rod, and the suction head ejector rod pushes the suction head unloading plate to remove the suction head from the suction head loading head. Completing the action of unloading the liquid-transferring sucker.

After the unloading sucker is finished, the stepping screw rod motor rotates clockwise, and the first optical coupling blocking piece fixed on the plunger push plate moves upwards together until the first photoelectric switch sensor does not trigger. And the pipettor is ready to load the suction head again, the suction head loading head is loaded into the suction head, the suction head unloading plate is pushed, the second optical coupling blocking piece fixed on the suction head unloading plate moves upwards, and the spring is kept simultaneously until the second photoelectric switch is triggered, so that the gun head loading is completed.

Further, the connecting structure comprises a protective cover 12, the protective cover 12 is movably arranged on the side surface of the mounting support plate 1, and the protective cover 12 has the function of connecting the upper part and the lower part and can protect internal parts at the same time.

Further, movable mounting has linear slide rail 6 on the inner wall of protection casing 12, and movable mounting has plunger push pedal 8 on the linear slide rail 6, and the one end movable mounting of lead screw 11 is on plunger push pedal 8, and step lead screw motor continues anticlockwise rotation, and the first opto-coupler separation blade that is fixed in the plunger push pedal is down moved together, triggers until first photoelectric switch sensor, and the pipettor has accomplished the liquid removal action this moment.

Furthermore, a plunger rod 13 is movably mounted at the bottom side of the plunger push plate 8, a cavity cover plate 16 is movably mounted at the bottom side of the plunger rod 13, a first O-shaped sealing ring 22 and a sealing ring 5 are movably mounted on the cavity cover plate 16, a closed space is formed by the plunger cavity, the sealing ring and the first O-shaped rubber ring, vacuum is formed in the cavity, a liquid sucking action is completed through a sucking head connected with a sucking head loading head by a runner transfer block, the stepping lead screw motor rotates anticlockwise, the plunger rod moves downwards, and liquid in the liquid sucking head is discharged.

Further, the base structure comprises a plunger cavity 15, the plunger cavity 15 is movably mounted at the bottom side of the protective cover 12, a first photoelectric switch 3 is movably mounted in the plunger cavity 15, a second photoelectric switch 9 is movably mounted on the side surface of the plunger cavity 15, a flow channel transfer block 18 is movably mounted at the bottom side of the plunger cavity 15, a suction head unloading plate 17 is movably mounted at the bottom side fixedly mounted on the flow channel transfer block 18, a suction head loading head 20 is movably mounted at the bottom side of the suction head unloading plate 17, the first photoelectric switch sensor is not triggered, the pipette is ready to unload the suction head again, the suction head loading head is mounted in the suction head, the suction head unloading plate is pushed, a second optical coupling blocking piece fixed on the suction head unloading plate moves upwards, and meanwhile, a spring is kept until the second photoelectric switch is triggered, and then the gun head loading is completed.

Further, one end of a retaining spring 23 is fixedly mounted on the bottom side of a plunger cavity 15, the other end of the retaining spring 23 is fixedly mounted on the top side of a suction head unloading plate 17, a second optocoupler baffle 10 is movably mounted on the bottom side of a plunger push plate 8, the second optocoupler baffle 10 is matched with the suction head unloading plate 17, an interface 7 and a flow channel 14 are movably mounted on the inner wall of the plunger cavity 15, a second O-shaped sealing ring 24 is movably mounted at the bottom end of a cavity cover plate 16, the interface 7, the flow channel 14 and the second O-shaped sealing ring 24 are matched, a stepping lead screw motor continues to rotate anticlockwise, the first optocoupler baffle fixed on the plunger push plate moves downwards together until a first photoelectric switch sensor triggers, at the moment, a liquid transfer suction head is finished, liquid transfer suction head unloading is started, the stepping lead screw motor continues to rotate anticlockwise, the plunger push plate continues to move downwards to push a push an ejector rod, the ejector rod pushes the suction head unloading plate to remove the suction head from the suction head loading liquid transfer head, and liquid transfer suction head action is finished.

Further, the driving structure comprises a stepping screw motor 4, the stepping screw motor 4 is movably mounted on the top side of the protective cover 12, a screw 11 is movably mounted on the bottom side of the stepping screw motor 4, one end of the screw 11 extends into the protective cover 12, a set screw 21 is movably mounted on the plunger push plate 8, and the set screw 21 is matched with the screw 11.

The utility model discloses theory of operation:

the utility model discloses an operating principle does, step-by-step lead screw motor clockwise rotation drives the screw rod and moves upwards, and the screw rod is fixed in the plunger push pedal through holding screw simultaneously, and the plunger rod upward movement because plunger cavity, sealing washer and first O type rubber circle form airtight space, forms the vacuum in the die cavity, through runner switching piece and the suction head that the suction head was connected of loading, accomplishes the imbibition action, step-by-step lead screw motor anticlockwise rotation, the plunger rod down moves, will move the liquid discharge in the liquid suction head.

Step-by-step lead screw motor continues anticlockwise rotation, and the first opto-coupler separation blade that is fixed in the plunger push pedal is down-motion together, triggers until first photoelectric switch sensor, and the pipettor has accomplished the liquid-transfering action this moment, begins to carry out and moves liquid suction head uninstallation, and step-by-step lead screw motor continues anticlockwise rotation, and the plunger push pedal continues the downward motion and promotes the suction head ejector pin, and suction head ejector pin promotion suction head uninstallation plate removes the suction head from the suction head loading head, accomplishes and moves liquid suction head action.

The walking screw motor clockwise rotation after the uninstallation suction head is accomplished, the first opto-coupler separation blade that is fixed in the plunger push pedal up-moves together, and up to first photoelectric switch sensor does not trigger, the pipettor is prepared to go to load the suction head once more, and suction head loading head loads into the suction head, promotes the suction head and unloads the support plate, and the second opto-coupler separation blade that is fixed in the suction head and unloads the support plate upwards moves, keeps the spring simultaneously, and the trigger is opened up to the second photoelectricity, and then the rifle head loads and accomplishes.

The setting of the retaining spring is used for keeping the suction head unloading plate and the second optical coupling separation blade to be located at the lowest position all the time when the suction head is not installed in the liquid transfer device, the situation that the suction head unloading plate and the second optical coupling separation blade move up and down in the moving process of the whole liquid transfer device and the second optical coupling separation blade is triggered to be switched on by mistake, misjudgment of gun head installation is generated, the specially-designed flow channel switching block transfers the flow channel of the plunger cavity to the edge position, the requirement of double-connection 9mm intervals is met, the interface of the specially-designed plunger cavity is used for being connected with an air pressure sensor, and air pressure in the cavity is detected in real time.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A pipettor structure, includes a mounting bracket plate (1), its characterized in that: the side movable mounting of installing support plate (1) has motor mounting panel (2), and the top side movable mounting of motor mounting panel (2) has drive structure, the bottom side movable mounting of motor mounting panel (2) has base structure, and movable mounting has connection structure between drive structure and the base structure.

2. A pipette structure according to claim 1, characterised in that: the connecting structure comprises a protective cover (12), and the protective cover (12) is movably arranged on the side surface of the mounting support plate (1).

3. A pipette structure according to claim 2, characterised in that: the inner wall of the protective cover (12) is movably provided with a linear sliding rail (6), the linear sliding rail (6) is movably provided with a plunger push plate (8), and one end of the screw rod (11) is movably arranged on the plunger push plate (8).

4. A pipette structure according to claim 3, characterised in that: the plunger piston comprises a plunger piston push plate (8), a plunger rod (13) is movably mounted on the bottom side of the plunger piston push plate (8), a cavity cover plate (16) is movably mounted on the bottom side of the plunger rod (13), and a first O-shaped sealing ring (22) and a sealing ring (5) are movably mounted on the cavity cover plate (16).

5. A pipette structure according to claim 1, characterised in that: the base structure comprises a plunger cavity (15), the plunger cavity (15) is movably mounted at the bottom side of the protective cover (12), a first photoelectric switch (3) is movably mounted in the plunger cavity (15), a second photoelectric switch (9) is movably mounted at the side surface of the plunger cavity (15), a flow channel transfer block (18) is movably mounted at the bottom side of the plunger cavity (15), a suction head unloading support plate (17) is movably mounted at the bottom side of the flow channel transfer block (18) fixedly mounted at the bottom side of the suction head unloading support plate (17), and a suction head loading head (20) is movably mounted at the bottom side of the suction head unloading support plate (17).

6. A pipette structure according to claim 5, characterised in that: plunger cavity (15) bottom side fixed mounting has the one end that keeps spring (23), the other end fixed mounting that keeps spring (23) is on the top side of suction head unloading board (17), the bottom side movable mounting of plunger push pedal (8) has second opto-coupler separation blade (10), second opto-coupler separation blade (10) and suction head unloading board (17) looks adaptation, movable mounting has interface (7) and runner (14) on the inner wall of plunger cavity (15), the bottom movable mounting of cavity apron (16) has second O type sealing washer (24), interface (7) and runner (14) and second O type sealing washer (24) looks adaptation.

7. A pipette structure according to claim 1, characterised in that: the drive structure includes step screw motor (4), and step screw motor (4) movable mounting has lead screw (11) in the top side of protection casing (12), the bottom side movable mounting of step screw motor (4), and the one end of lead screw (11) extends to the inside of protection casing (12), and movable mounting has holding screw (21) on plunger push pedal (8), holding screw (21) and lead screw (11) looks adaptation.