CN116532176A

CN116532176A - Quantitative pipettor

Info

Publication number: CN116532176A
Application number: CN202310642471.1A
Authority: CN
Inventors: 沈晓雯; 蒋林燕; 黄琳玲
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-06-01
Filing date: 2023-06-01
Publication date: 2023-08-04

Abstract

The quantitative liquid dispenser comprises a liquid dispenser body, wherein a hook is fixedly arranged at the top of one side of the liquid dispenser body, which is provided with a rotary pressing rod, a button capable of being pressed up and down is arranged at the top of the other side of the liquid dispenser body, a suction pipe is fixedly arranged at the bottom of the liquid dispenser body, a sliding sleeve is sleeved outside the suction pipe in a sliding manner, and the sliding sleeve is arranged in the liquid dispenser body in a sliding manner and is fixed at the bottom of the button; the overturning rod with two overturned sides overturns to drive the clamping plate to clamp the test tube in a positioning manner, then drives the test tube to ascend, stretches the suction nozzle into the test tube, achieves no touch liquid suction and liquid discharge of the suction nozzle, avoids hand shake to cause the suction nozzle to touch the test tube wall, greatly improves the reliability of experiments, and can achieve clamping and ascending actions of the test tube in the process by simply pressing the pressing rod, and is simple and convenient to use.

Description

Quantitative pipettor

Technical Field

The invention relates to the related field of pipettors, in particular to a quantitative pipettor.

Background

The quantitative liquid transferring device is characterized by comprising a liquid transferring device, wherein the liquid transferring device is used for enabling quantitative liquid transferring devices commonly used in biochemical experiments to be divided into a plurality of specifications according to the quantity of one-time liquid transferring, the operation mode of the single liquid transferring device is adjustable in a certain range, the operation mode of the single liquid transferring device is single, liquid transferring work and the falling-off work of a disposable suction nozzle are carried out in a thumb pressing mode, the muscle stiffness of the thumb can be caused by long-time operation, the conventional liquid transferring device is used for taking or releasing liquid from a test tube, the test tube is generally held by one hand, the other hand is used for controlling the liquid transferring device to extend into the test tube, liquid is easy to be adhered to the outside of the suction nozzle due to the fact that the disposable suction nozzle on the liquid transferring device is contacted with the test tube wall due to shaking of the hand, and the actual liquid transferring amount is large when the liquid is released, and the accuracy of the experiment is affected.

Disclosure of Invention

The object of the present invention is to provide a quantitative pipette solving the above problems.

The technical aim of the invention is realized by the following technical scheme: the quantitative pipettor comprises a pipettor body, wherein a rotary pressing rod is arranged at the top of the pipettor body, a hook is fixedly arranged at the top of one side of the pipettor body, a button capable of being pressed up and down is arranged at the top of the other side of the pipettor body, a suction pipe is fixedly arranged at the bottom of the pipettor body, a sliding sleeve is sleeved outside the suction pipe in a sliding manner, and the sliding sleeve is arranged in the pipettor body in a sliding manner and is fixed at the bottom of the button;

the outer mounting sleeve of the pipette body is provided with a shell, a supporting plate positioned on the lower side of the hook is fixed on the top of one side of the shell, a groove for placing the hook is formed in the top of the supporting plate, a cover plate is arranged above the supporting plate in a sliding mode, the cover plate and the supporting plate can clamp and fix the upper side and the lower side of the hook, an opening is formed in the top of the other side of the shell, the button can slide in the opening, a pressing plate capable of being pressed down is arranged above the opening, telescopic rods I capable of being stretched are arranged on two sides of the center of the top of the shell, mounting sleeves are mounted on the two sides of the telescopic rods I, a rotary sleeve right opposite to the upper side of the rotary pressing rod is arranged in the mounting sleeve in a rotating mode, and the rotary sleeve can be sleeved on the top of the rotary pressing rod;

the shell corresponds to the supporting plate and two sides of the opening are provided with grooves, the inner wall of one side of the groove far away from the opening is provided with a sliding block in a sliding manner, the sliding block is symmetrically connected with a turnover rod towards two sides of one end of the opening in a rotating manner, the end part of the turnover rod is fixedly provided with a clamping plate, two sides in the shell are provided with guide sliding grooves, two ends of the guide sliding grooves are communicated with the side walls of the groove, two sides in the guide sliding grooves are provided with sliding plates in a sliding manner, the end part of the sliding plate stretches into the groove, one side of the groove is provided with a pressing rod, the top of the pressing rod is hinged with the shell, the bottom of the pressing rod is hinged with an upper push rod through the end part of the sliding plate on the same side, the bottom of the pressing rod is also hinged with a lower push rod, the end part of the lower push rod is connected with the turnover rod on the same side in a sliding manner, two sides of the turnover rod are connected with a synchronous mechanism, and the synchronous mechanism can realize synchronous turnover of the two sides of the turnover rod;

the top parts of the sliding blocks at two sides are respectively fixed with a fixed plate, and the end parts of the sliding plates extending into the grooves are positioned below the fixed plates and can prop against the bottoms of the fixed plates;

the top of the groove on one side of the pressing rod is provided with a rope winding mechanism, a first stay rope in the rope winding mechanism is fixed with the bottom of the telescopic rod, and the first stay rope is wound by the rope winding mechanism, can pull the telescopic rod to descend and drive the rotary pressing rod to press downwards.

Preferably, a limiting rod is fixed towards one side of the pipette body, the limiting rod can limit the top of the pipette body, a convex ring is fixedly arranged at the bottom of the shell inwards, and the convex ring can limit the bottom of the pipette body.

Preferably, the top of the shell is symmetrically provided with two first telescopic grooves, the first telescopic rods on two sides are arranged on the two sides in the first telescopic grooves in a vertically sliding mode, and the first pull ropes penetrate from the bottom of the first telescopic grooves and are fixedly connected with the bottom of the first telescopic rods.

Preferably, the installation sleeve is rotationally connected with one side of one top of the telescopic rod, the other side of the installation sleeve is provided with an arc groove at one top of the telescopic rod, one end, far away from the rotation center, of the bottom of the installation sleeve is fixedly provided with an arc clamping block, the arc clamping block can be clamped into the arc groove from an opening at the side edge of the arc groove, and the radian of the arc groove and the arc clamping block is respectively equal to the rotation center of the installation sleeve as the circle center.

Preferably, the turnover rod consists of a horizontal section and an inclined section, one end of the inclined section, which is far away from the horizontal section, is inclined downwards, and a sliding rail is transversely arranged in the turnover rod in a penetrating manner.

Preferably, the synchronous mechanism comprises sliding rods arranged in two sliding rails on the same side, the same ends of the sliding rods on two sides are fixedly connected through the synchronous rods, the sliding rods on one side close to the pressing rods penetrate through the end parts of the lower push rods and are rotationally connected, a second telescopic rod is fixed at the top of each synchronous rod, a sliding sleeve is sleeved on the outer portion of each telescopic rod in a sliding mode, the sliding sleeve is fixed on the shell, and a first spring is fixedly connected between the inner top walls of the sliding sleeve at the top of each telescopic rod.

Preferably, a wedge-shaped groove is arranged on one side, far away from the opening, of the groove, and the fixing plate is in sliding connection with the wedge-shaped groove.

Preferably, the rope winding mechanism comprises a winding cavity arranged above the groove on one side, a rotating shaft is rotationally arranged in the winding cavity, a gear is fixed in the middle of the outer circular surface of the rotating shaft, winding wheels fixed on the rotating shaft are symmetrically arranged on two sides of the gear, the first pull rope is wound on the winding wheels on two sides, a spring is fixed between the inner walls of the winding cavity, a vertical rod capable of sliding up and down is arranged on the bottom wall of the winding cavity, the bottom of the vertical rod stretches into the groove, a cross rod is fixed at the top of the vertical rod, a second spring is fixed between the bottom of the cross rod and the bottom wall of the winding cavity, a rack is transversely arranged on the upper surface of the cross rod in a sliding mode, one end of the rack extends to the outside of the shell and can be abutted against the second spring is transversely fixed between the other end of the rack and the cross rod, and the upper surface of the rack is a tooth surface and can be meshed with the gear.

Preferably, the elastic force of the spring can ensure that the first stay cord is in a tensioning state, but the rotating sleeve cannot be driven to press down to rotate the pressing rod.

Preferably, a counter is arranged on one side of the pipette body, when the rotary pressing rod is rotated to adjust the suction amount of the pipette body, the counter is used for displaying the adjustment condition, an observation window is arranged at the position, opposite to the counter, of the shell, and the reading of the counter can be seen through the observation window.

Preferably, the opening diapire bilateral symmetry is equipped with the telescopic link III that can stretch out and draw back from top to bottom, telescopic link three tops all is fixed with leads the slider, the clamp plate slides and sets up both sides lead between the slider, the equal fixedly connected with stay cord two of telescopic link three bottoms, stay cord two keep away from telescopic link three one end wear out to the shell outside and with press pole fixed connection.

Preferably, a torsion spring is installed at the hinge of the pressing rod, and the pressing rod is kept in an inclined state under the elasticity of the torsion spring.

Preferably, the outer surface of the clamping plate is wrapped with a flexible anti-slip layer, and the bottom of the rotary sleeve is also provided with the flexible anti-slip layer.

Preferably, a spring IV is fixedly connected between the bottom of the sliding block and the bottom wall of the groove.

Preferably, the common width of the sliding block and the turnover rod is smaller than the width between the two upper pushing rods on the same side, and the sliding block and the turnover rod can pass through the space between the two upper pushing rods.

In summary, the invention has the following beneficial effects:

the clamping plate is driven to clamp the test tube in a positioning manner through the turnover rods with the turnover sides, then the test tube is driven to ascend, the suction nozzle stretches into the test tube, no-touch liquid suction and liquid discharge of the suction nozzle are realized, the phenomenon that the suction nozzle touches the test tube wall due to hand shake is avoided, the reliability of an experiment is greatly improved, the clamping and ascending actions of the test tube in the process can be realized by simply pressing the pressing rod, and the use is simple and convenient;

when thumb uses frequently and tired, when need not to press from both sides tight test tube, accessible simple deformation accomodates turnover rod and clamping plate in the recess, can realize driving rotatory pressing rod on the pipettor main part and push down when pressing the pressing rod this moment, when releasing the pressing rod, rotatory pressing rod then lifts automatically, can drive the button and push down through outwards pushing the pressing rod, realizes the drop of suction nozzle, has changed operation, has alleviateed the operating strength of thumb.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic perspective view of a first perspective view of an embodiment of the present invention;

FIG. 2 is a schematic view of a second perspective of an embodiment of the present invention;

FIG. 3 is a schematic view of a first perspective view, partially in section, of an embodiment of the present invention;

FIG. 4 is a schematic view of a second perspective view, partially in section, of an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of the structure of FIG. 4A according to the embodiment of the present invention;

FIG. 6 is a schematic perspective view in cross-section of a housing according to an embodiment of the invention;

FIG. 7 is a schematic view showing the internal structure of the housing according to the embodiment of the present invention;

FIG. 8 is an enlarged schematic view of the structure of FIG. 7B according to the embodiment of the present invention;

FIG. 9 is a schematic view illustrating the structure of the C-C direction in FIG. 8 according to an embodiment of the present invention;

FIG. 10 is an enlarged schematic view of the structure of FIG. 3D according to an embodiment of the present invention;

FIG. 11 is a schematic view of the internal structure of a sliding guide sleeve according to an embodiment of the present invention;

FIG. 12 is a schematic view of the structure of the E-E direction in FIG. 7 according to an embodiment of the present invention.

In the figure: 1. a pipette body; 2. a housing; 11. rotating the pressing rod; 12. a hook; 13. a button; 14. a suction pipe; 15. a sliding sleeve; 16. a counter; 21. a supporting plate; 22. a cover plate; 23. an opening; 24. a pressing plate; 25. a first telescopic rod; 26. a mounting sleeve; 27. a rotating sleeve; 28. a groove; 29. a slide block; 30. turning over the rod; 31. a clamping plate; 32. a guide chute; 33. a sliding plate; 34. pressing a pressing rod; 35. an upper push rod; 36. a push rod is downwards pushed; 37. a fixing plate; 38. a limit rod; 39. a convex ring; 40. a first telescopic groove; 41. an arc-shaped groove; 42. an arc-shaped clamping block; 43. an observation window; 44. a telescopic rod III; 45. a guide block; 46. a second rope; 70. a slide bar; 71. a synchronizing lever; 72. a second telescopic rod; 73. a sliding guide sleeve; 74. a first spring; 81. a first pull rope; 82. a winding chamber; 83. a rotating shaft; 84. a gear; 85. a reel; 86. a spring; 87. a vertical rod; 88. a cross bar; 89. a second spring; 90. a rack; 91. a third spring; 301. a horizontal section; 302. an inclined section; 303. a slide rail.

Detailed Description

The quantitative liquid dispenser described with reference to fig. 1-12 comprises a liquid dispenser main body 1, wherein a rotary pressing rod 11 is arranged at the top of the liquid dispenser main body 1, a hook 12 is fixedly arranged at the top of one side of the liquid dispenser main body 1, a button 13 capable of being pressed up and down is arranged at the top of the other side of the liquid dispenser main body 1, a suction pipe 14 is fixedly arranged at the bottom of the liquid dispenser main body 1, a sliding sleeve 15 is sleeved outside the suction pipe 14 in a sliding manner, and the sliding sleeve 15 is arranged in the liquid dispenser main body 1 in a sliding manner and is fixed at the bottom of the button 13;

the outer mounting sleeve of the pipette body 1 is provided with a shell 2, a supporting plate 21 positioned at the lower side of a hook 12 is fixed at the top of one side of the shell 2, a groove for placing the hook 12 is formed in the top of the supporting plate 21, a cover plate 22 is slidably arranged above the supporting plate 21, the cover plate 22 and the supporting plate 21 can clamp and fix the upper side and the lower side of the hook 12, an opening 23 is formed in the top of the other side of the shell 2, a button 13 can slide in the opening 23, a pressing plate 24 capable of being pressed down is arranged above the opening 23, a telescopic first 25 is arranged at two sides of the center of the top of the shell 2, a mounting sleeve 26 is arranged at the top of the telescopic first 25, a rotating sleeve 27 which is just opposite to the upper side of the rotating pressing rod 11 is rotationally arranged in the mounting sleeve 26, and the rotating sleeve 27 can be sleeved at the top of the rotating pressing rod 11;

the shell 2 is provided with grooves 28 corresponding to the supporting plate 21 and the two sides of the opening 23, the inner wall of one side of the groove 28 far away from the opening is provided with a sliding block 29 in a sliding way, the sliding block 29 is symmetrically connected with a turnover rod 30 towards the two sides of one end of the opening in a rotating way, the end part of the turnover rod 30 is fixedly provided with a clamping plate 31, the two sides in the shell 2 are provided with guide grooves 32, the two ends of the guide grooves 32 are communicated with the side walls of the groove 28 on the two sides, the two sides in the guide grooves 32 are provided with sliding plates 33 in a sliding way up and down, the end part of the sliding plate 33 extends into the groove 28 on one side, a pressing rod 34 is arranged outside the groove 28 on one side, the top of the pressing rod 34 is hinged with the shell 2, the end part of the sliding plate 33 on the same side is hinged with an upper pushing rod 35, the bottom of the pressing rod 34 is also hinged with a lower pushing rod 36, the end part of the lower pushing rod 36 is connected with the turnover rod 30 on the same side in a sliding way, a synchronizing mechanism 7 is connected between the two sides of the turnover rod 30, and the synchronizing mechanism 7 can realize the synchronous turnover of the turnover rod 30 on the two sides;

a fixed plate 37 is fixed on the top of the sliding block 29 on both sides, and the end part of the sliding plate 33 extending into the groove 28 is positioned below the fixed plate 37 and can prop against the bottom of the fixed plate 37;

the top of the groove 28 provided with one side of the pressing rod 34 is provided with a rope winding mechanism 8, a first stay rope 81 in the rope winding mechanism 8 is fixed with the bottom of the first telescopic rod 25, and the rope winding mechanism 8 winds the first stay rope 81 to pull the first telescopic rod 25 to descend and drive the rotary pressing rod 11 to press downwards.

Advantageously, a stop lever 38 is fixed on one side of the pipette body 1, the stop lever 38 can stop the top of the pipette body 1, a convex ring 39 is fixed inward on the bottom of the housing 2, and the convex ring 39 can stop the bottom of the pipette body 1.

Advantageously, two first telescopic slots 40 are symmetrically arranged at the top of the housing 2, the first telescopic rods 25 at two sides are arranged in the first telescopic slots 40 in a vertically sliding manner, and the first pull ropes 81 penetrate from the bottom of the first telescopic slots 40 and are fixedly connected with the bottom of the first telescopic rods 25.

The installation sleeve 26 is rotatably connected with one side of the top of the telescopic rod one 25, the other side of the installation sleeve 26 is provided with an arc groove 41 at the top of the telescopic rod one 25, one end, far away from the rotation center, of the bottom of the installation sleeve 26 is fixedly provided with an arc clamping block 42, the arc clamping block 42 can be clamped into the arc groove 41 from an opening at the side edge of the arc groove 41, and the radian of the arc groove 41 and the arc clamping block 42 takes the rotation center of the installation sleeve 26 as the circle center.

Advantageously, the turnover rod 30 is composed of a horizontal section 301 and an inclined section 302, one end of the inclined section 302 away from the horizontal section 301 is inclined downwards, and a sliding rail 303 is transversely arranged in the turnover rod 30 in a penetrating manner.

Advantageously, the synchronizing mechanism 7 includes a sliding rod 70 slidably disposed in the two slide rails 303 on the same side, two identical ends of the sliding rod 70 are fixedly connected through a synchronizing rod 71, the sliding rod 70 near one side of the pressing rod 34 penetrates through the end of the push rod 36 and is rotatably connected, a second telescopic rod 72 is fixedly disposed at the top of the synchronizing rod 71 on one side, a sliding sleeve 73 is slidably sleeved outside the second telescopic rod 72, the sliding sleeve 73 is fixed on the housing 2, and a first spring 74 is fixedly connected between the top walls of the sliding sleeve 73 on the top of the second telescopic rod 72.

Advantageously, the side of the recess 28 facing away from the opening is provided with a wedge-shaped groove, with which the fixing plate 37 is slidingly connected.

The rope winding mechanism 8 comprises a winding cavity 82 arranged above the groove 28 on one side, a rotating shaft 83 is rotationally arranged in the winding cavity 82, a gear 84 is fixed in the middle of the outer circular surface of the rotating shaft 83, winding wheels 85 fixed on the rotating shaft 83 are symmetrically arranged on two sides of the gear 84, a first pull rope 81 is wound on the winding wheels 85 on two sides, a spiral spring 86 is fixed between the inner walls of the winding cavity 82, a vertical rod 87 capable of sliding up and down is arranged on the bottom wall of the winding cavity 82, the bottom of the vertical rod 87 stretches into the groove 28, a cross rod 88 is fixed at the top of the vertical rod 87, a second spring 89 is fixed between the bottom of the cross rod 88 and the bottom wall of the winding cavity 82, a rack 90 is transversely arranged on the upper surface of the cross rod 88 in a sliding mode, one end of the rack 90 extends to the outer portion of the shell 2 and can be abutted against the outer surface of the shell, a third spring 91 is transversely fixed between the other end of the rack 90 and the cross rod 88, and the upper surface of the rack 90 is a tooth surface and can be meshed with the gear 84.

Advantageously, the spring force of the spring 86 ensures that the first pull cord 81 is in tension, but cannot drive the rotating sleeve 27 to press down the rotating pressing rod 11.

Advantageously, a counter 16 is disposed on one side of the pipette body 1, when the rotary pressing rod 11 is rotated to adjust the sucking amount of the pipette body 1, the counter 16 is used to display the adjusting condition, an observation window 43 is disposed at a position of the casing 2 opposite to the counter 16, and the reading of the counter 16 can be seen through the observation window 43.

The telescopic rod III 44 which can stretch up and down is symmetrically arranged on two sides of the bottom wall of the opening 23, the top of the telescopic rod III 44 is fixedly provided with a guide sliding block 45, the pressing plate 24 is arranged on two sides in a sliding mode between the guide sliding blocks 45, the bottom of the telescopic rod III 44 is fixedly connected with a pull rope II 46, and one end, far away from the telescopic rod III 44, of the pull rope II 46 penetrates out of the outer shell 2 and is fixedly connected with the pressing rod 34.

Advantageously, a torsion spring is installed at the hinge of the pressing lever 34, and the pressing lever 34 maintains an inclined state under the elastic force of the torsion spring.

Advantageously, the outer surface of the clamping plate 31 is wrapped with a flexible anti-slip layer, and the bottom of the rotating sleeve 27 is also provided with a flexible anti-slip layer.

Advantageously, a fourth spring 50 is fixedly connected between the bottom of the slider 29 and the bottom wall of the recess 28.

Advantageously, the common width of the slider 29 and the flipping lever 30 is smaller than the width between the two upper push rods 35 on the same side, the slider 29 and the flipping lever 30 being able to pass between the two upper push rods 35.

The application method of the invention comprises the following steps:

the initial state is as follows: the cover plate 22 clamps the hook 12 in the groove of the supporting plate 21, the upper end and the lower end of the liquid transfer device main body 1 are limited and clamped through the limiting rod 38 and the convex ring 39, the rotary sleeve 27 is sleeved on the top of the rotary pressing rod 11, the pressing plate 24 is positioned above the button 13, the telescopic rod II 72 is contracted under the elasticity of the first spring 74, the synchronizing rod 71 is positioned at the upper limit position, the overturning rod 30 is in the unfolding state, the sliding plate 33 is positioned at the lower limit position, the sliding block 29 is positioned at the lower limit position, and the rack 90 is positioned at the lower limit position and is disengaged from the gear 84.

When the test tube is taken, a disposable suction nozzle is sleeved at the bottom of the suction tube 14, the shell 2 is held by a hand, four fingertips except for the thumb are placed on the pressing rod 34, the suction nozzle is opposite to the upper side of the test tube, the finger presses the pressing rod 34, the pressing rod 34 drives the same side sliding rod 70 to downwards press through the lower push rod 36, one side sliding rod 70 drives the other side sliding rod 70 to synchronously downwards press through the synchronizing rod 71, the two side rolling rods 30 are further driven to synchronously downwards overturn until the inclined section 302 is in a vertical state, at the moment, the two side synchronizing rods 71 clamp the outer part of the test tube, the flexible anti-slip layer can prevent the test tube from being broken and slide when clamped, the pressing rod 34 drives the sliding plate 33 to be pushed up against the bottom of the fixed plate 37 through the upper push rod 35, the pressing rod 34 is continuously pressed against the pressing rod 34, at the moment, the sliding rod 70 can vertically slide in the sliding rail 303 of the inclined section 302 through the limitation of the two side sliding rod 70 and the synchronizing rod 71, the two side sliding rod 303 is ensured to be synchronously downwards pressed, the upper push rod 35 further drives the sliding plate to upwards, the sliding plate is driven to automatically lift the sliding plate 37, the sliding plate is driven to be lifted up, the slide plate 29 is further pushed up by the sliding plate is driven to rotate, the sliding plate is pushed up by the thumb, the sliding plate is pushed by the sliding plate 29 is rotated, and then the slide plate is pushed up by the thumb 11, the sliding plate is rotated and the slide body is pushed by the slide body, the slide plate is pushed by the slide rod, and the slide body, and the slide rod is pushed by the slide rod, and the slide rod is further, and the slide rod is pushed by the slide rod and is pushed by the slide, and the slide 30;

then release the pressing to the pressing rod 34, at this moment pressing the pressing rod 34 to reset under the action of torsional spring, the slide block 29 resets under the elasticity of 50, and then put back the test tube, then the synchronizing rod 71 moves up and resets under the elasticity of the first spring 74, and then drive the turning rod 30 to reverse and reset, if the quantitative liquid that moves out only needs to release to the large-caliber container such as the culture dish, then need not to press the pressing rod 34, direct pressing the rotating sleeve 27 drives the rotary pressing rod 11, release the liquid to the container, if release the liquid to the test tube, need clamp the test tube and then release the liquid according to the above-mentioned process, avoid the suction nozzle touching the test tube; similarly, if the container is a large-caliber container such as a culture dish, the clamping work is not needed, and the liquid can be directly taken by pressing and releasing the rotary sleeve 27;

after the pipetting is finished, the used disposable suction nozzle needs to be discarded, at the moment, the pressing plate 24 can be pressed by the thumb and the button 13 is pressed, the button 13 drives the sliding sleeve 15 to press down and the suction nozzle sleeved on the suction pipe 14 is separated, if the thumb is pressed too much and fatigued, the pressing rod 34 can be pushed outwards by fingers except the thumb, the pulling rope II 46 is pulled tightly, the telescopic rod III 44 is pulled to press down and the pressing plate 24 is driven to descend, and the button 13 is pressed down.

If the liquid taking amount needs to be regulated, only the rotary sleeve 27 is required to be rotated, the rotary sleeve 27 synchronously drives the rotary pressing rod 11 to rotate to be regulated, meanwhile, the reading of the counter 16 is observed through the observation window 43 until the liquid taking amount is regulated to the required liquid taking amount, in the process, the spring 86 can adaptively drive the winding wheel 85 to rotate, and further, the first stay rope 81 is adaptively retracted and released, so that the first stay rope 81 is ensured to be in a tensioning state;

if the pipette body 1 with different specifications needs to be replaced, the cover plate 22 is moved to the side far away from the rotary pressing rod 11 to the side of the hook 12, the pressing plate 24 is moved to the side far away from the rotary pressing rod 11 to the side of the button 13, then the mounting sleeve 26 is pulled up, the rotary sleeve 27 is separated from the rotary pressing rod 11, then only the side of the mounting sleeve 26 is rotated, at this time, the pipette body 1 is taken out from the housing 2, the pipette body 1 with corresponding specifications is replaced into the housing 2 again, and the cover plate 22, the mounting sleeve 26 and the pressing plate 24 are reset.

When the thumb is tired for a long time and the test tube is not required to be clamped, the pressing rod 34 can be pressed until the inclined section 302 is in a vertical state, the pressing rod 34 is stopped to be pressed, meanwhile, the overturning rod 30 is lifted upwards manually, at the moment, the sliding block 29 and the overturning rod 30 pass through the space between the push rods 35 on two sides, at the moment, the overturning rod 30 can be lifted upwards while the angle of the overturning rod 30 is adjusted, the sliding rod 70 slides in the sliding rail 303 in the inclined section 302 in a self-adaptive manner, when the clamping plate 31 is higher than the bottom wall of the groove 28, the clamping plate 31 is overturned into the groove 28 and is abutted against the bottom wall of the groove 28, at the moment, the sliding block 29 is pressed down by the elasticity of 50, the clamping plate 31 is pressed on the bottom wall of the groove 28, at the moment, the fixing plate 37 is positioned at the upper limit position and pushes the vertical rod 87 upwards, the rack 90 is driven to be meshed with the gear 84, at the moment, the sliding rod 70 only slides in the sliding rail 303 in the inclined section 302 in a self-adaptive manner, at the moment, the pressing rod 34 pushes the 90 to rotate and drives the gear 84 to rotate, the rolling wheel 85 to rotate, and then wind the pulling rope 81, so as to roll up, and then rotate the pulling rod 25, and push the lifting rod 25 to rotate, push the lifting rod, move the lifting rod, so as to rotate, and drop rod, can rotate the lifting rod, so as to release the lifting rod, and drop rod 11, and drop by the lifting rod, through the rotating rod, can easily.

The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the present invention and implement it without limiting the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.

Claims

1. Quantitative pipettor, comprising a pipettor body (1), characterized in that: the top of the liquid transfer device body (1) is provided with a rotary pressing rod (11), the top of one side of the liquid transfer device body (1) is fixedly provided with a hook (12), the top of the other side of the liquid transfer device body (1) is provided with a button (13) capable of being pressed up and down, the bottom of the liquid transfer device body (1) is fixedly provided with a suction pipe (14), the outside of the suction pipe (14) is sleeved with a sliding sleeve (15) in a sliding manner, and the sliding sleeve (15) is arranged in the liquid transfer device body (1) in a sliding manner and is fixed at the bottom of the button (13);

the automatic liquid transferring device is characterized in that a shell (2) is sleeved outside the liquid transferring device body (1), a supporting plate (21) positioned at the lower side of the hook (12) is fixed at the top of one side of the shell (2), a groove for placing the hook (12) is formed in the top of the supporting plate (21), a cover plate (22) is slidably arranged above the supporting plate (21), the cover plate (22) and the supporting plate (21) can clamp and fix the upper side and the lower side of the hook (12), an opening (23) is formed in the top of the other side of the shell (2), a button (13) can slide in the opening (23), a pressing plate (24) capable of being pressed downwards is arranged above the opening (23), telescopic first telescopic rods (25) are arranged at two sides of the center of the top of the shell (2), mounting sleeves (26) are arranged at the top of the telescopic first telescopic rods, a rotary sleeve (27) which is opposite to the upper side of the rotary pressing rod (11) is rotatably arranged above the mounting sleeves (26), and the rotary sleeve (27) can be sleeved at the top of the rotary pressing rod (11).

The synchronous turnover mechanism comprises a shell (2), a supporting plate (21) and an opening (23), wherein grooves (28) are formed in two sides of the shell, the grooves (28) are arranged on the inner wall of one side far away from the opening in a sliding manner, sliding blocks (29) are symmetrically connected with turnover rods (30) towards two sides of one end of the opening in a rotating manner, clamping plates (31) are fixed at the end parts of the turnover rods (30), guide sliding grooves (32) are formed in two sides in the shell (2), sliding plates (33) are arranged in the guide sliding grooves (32) in a sliding manner in two sides, the end parts of the sliding plates (33) extend into the grooves (28), pressing rods (34) are arranged on the outer side of one side of the grooves (28), the tops of the pressing rods (34) are hinged with the shell (2), upper pushing rods (35) are hinged to the end parts of the sliding plates (33) on the same side, lower pushing rods (36) are hinged to the bottom ends of the pressing rods (34), and the lower pushing rods (36) are connected with the turnover rods (30) in a sliding manner, and the two sides of the turnover rods (30) can be synchronously connected with the turnover mechanisms (7) on two sides;

a fixed plate (37) is fixed at the top of the sliding block (29) at both sides, and the inner end part of the sliding plate (33) extending into the groove (28) is positioned below the fixed plate (37) and can prop against the bottom of the fixed plate (37);

the top of the groove (28) on one side of the pressing rod (34) is provided with a rope winding mechanism (8), a first stay rope (81) in the rope winding mechanism (8) is fixed with the bottom of the first telescopic rod (25), and the rope winding mechanism (8) winds the first stay rope (81) to pull the first telescopic rod (25) to descend and drive the rotary pressing rod (11) to press downwards.

2. A quantitative pipette according to claim 1, wherein: the direction one side of the liquid transfer device body (1) is fixedly provided with a limiting rod (38), the limiting rod (38) can limit the top of the liquid transfer device body (1), the bottom of the shell (2) is internally fixedly provided with a convex ring (39), and the convex ring (39) can limit the bottom of the liquid transfer device body (1).

3. A quantitative pipette according to claim 1, wherein: two first telescopic grooves (40) are symmetrically formed in the top of the shell 2, the first telescopic rods (25) on two sides are arranged in the first telescopic grooves (40) in a vertically sliding mode, and the first pull ropes (81) penetrate through the bottoms of the first telescopic grooves (40) and are fixedly connected with the bottoms of the first telescopic rods (25).

4. A quantitative pipette according to claim 1, wherein: the installation sleeve (26) is rotationally connected with one side the telescopic link one (25) top, and the opposite side the arc wall (41) has been seted up at telescopic link one (25) top, the one end of keeping away from the center of rotation in installation sleeve (26) bottom is fixed with arc fixture block (42), arc fixture block (42) can follow arc wall (41) side opening card is gone into in arc wall (41), arc wall (41) with the radian of arc fixture block (42) all uses the center of rotation of installation sleeve (26) is the centre of a circle.

5. A quantitative pipette according to claim 1, wherein: the turnover rod (30) consists of a horizontal section (301) and an inclined section (302), one end, far away from the horizontal section (301), of the inclined section (302) is inclined downwards, and a sliding rail (303) transversely penetrates through the turnover rod (30).

6. A quantitative pipette according to claim 5, wherein: the synchronous mechanism (7) comprises sliding rods (70) which are arranged on the same side in two sliding rails (303), the same ends of the sliding rods (70) are fixedly connected through the synchronous rods (71), the sliding rods (70) which are close to one side of the pressing rods (34) penetrate through the end parts of the lower push rods (36) and are rotatably connected, telescopic rods (72) are fixedly arranged at the tops of the synchronous rods (71), sliding sleeves (73) are sleeved outside the telescopic rods (72), the sliding sleeves (73) are fixed on the outer shell (2), and springs (74) are fixedly connected between the tops of the telescopic rods (72) and the inner top walls of the sliding sleeves (73).

7. A quantitative pipette according to claim 1, wherein: the rope winding mechanism (8) comprises a winding cavity (82) arranged above the groove (28) on one side, a rotating shaft (83) is rotationally arranged in the winding cavity (82), a gear (84) is fixed in the middle of the outer circular surface of the rotating shaft (83), winding wheels (85) fixed on the rotating shaft (83) are symmetrically arranged on two sides of the gear (84), a first pull rope (81) is wound on the winding wheels (85) on two sides, a first spring (86) is fixed between the inner walls of the winding cavity (82) and the winding wheels (85), a vertical rod (87) capable of sliding up and down is arranged on the bottom wall of the winding cavity (82), a cross rod (88) is fixed at the top of the vertical rod (87), a second spring (89) is fixed between the bottom of the cross rod (88) and the bottom wall of the winding cavity (82), a first rack (90) is arranged on the upper surface of the cross rod (88) in a sliding mode, one end of the rack (90) extends to the outside of the shell (2) and can be abutted against the outer surface of the rack (90), and the other end of the rack (90) can be meshed with the third rack (84) on the surface of the cross rod (84); the elastic force of the spring (86) can ensure that the first stay cord (81) is in a tensioning state, but the rotating sleeve (27) cannot be driven to press down the rotary pressing rod (11).

8. A quantitative pipette according to claim 1, wherein: the automatic liquid transfer device is characterized in that a counter (16) is arranged on one side of the liquid transfer device body (1), when the rotary pressing rod (11) is rotated to adjust the sucking quantity of the liquid transfer device body (1), the counter (16) is used for displaying the adjusting condition, an observation window (43) is arranged at the position, opposite to the counter (16), of the shell (2), and the reading of the counter (16) can be seen through the observation window (43).

9. A quantitative pipette according to claim 1, wherein: the utility model discloses a telescopic handle, including opening (23) diapire bilateral symmetry is equipped with telescopic handle three (44) that can stretch out and draw back from top to bottom, telescopic handle three (44) top all is fixed with leads slider (45), clamp plate (24) slip setting are in both sides lead between slider (45), telescopic handle three (44) bottom all fixedly connected with stay cord two (46), stay cord two (46) are kept away from telescopic handle three (44) one end wear out to shell (2) outside and with press pole (34) fixed connection.

10. A quantitative pipette according to claim 1, wherein: a torsion spring is arranged at the hinge joint of the pressing rod (34), and the pressing rod (34) is kept in an inclined state under the elasticity of the torsion spring; and a spring IV (50) is fixedly connected between the bottom of the sliding block (29) and the bottom wall of the groove (28).