CN209885847U

CN209885847U - Reading structure and calibration structure for pipette

Info

Publication number: CN209885847U
Application number: CN201921507647.8U
Authority: CN
Inventors: 付沈斌
Original assignee: Guangzhou Guorui Scientific Instrument Co Ltd
Current assignee: Guangzhou Guorui Scientific Instrument Co Ltd
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-01-03
Anticipated expiration: 2029-09-10

Abstract

The utility model provides a reading structure, which comprises a driving gear, a bracket, a gear assembly, an enhancing assembly and a reading assembly; the driving gear is connected with the bracket and rotates relative to the bracket; the driving gear is configured to be meshed with the first transmission gear, and the second transmission gear is configured to be meshed with the second sawtooth of the clutch gear; the first saw tooth of the clutch gear is configured to be meshed with the ratchet groove wheel; the digital gear set and the boosting gear set are matched to rotate, a boosting gear is connected between every two adjacent digital gears, so that the upper end parts of the boosting gears are meshed with the gear end of one of the digital gears, and the lower end parts of the boosting gears are rotationally connected with the notch end of the other digital gear; when the driving gear rotates, the first transmission gear and the second transmission gear are driven to rotate together, the clutch gear and the ratchet groove wheel are further driven to rotate together, the boosting gear set and the digital gear set rotate along with the rotation of the ratchet groove wheel, and therefore digital carry is achieved.

Description

Reading structure and calibration structure for pipette

Technical Field

The utility model relates to a precision instruments field especially relates to a reading structure and calibration structure for liquid-transfering gun.

Background

The pipette is one kind of pipettor, is commonly used in the removal of laboratory a small amount or trace liquid, and the specification is different, and its inside piston structure is also different. In the specification and model of adjustable range, most of liquid-transfering guns all adopt piston cylinder and sealing washer for whole rifle is fixed, and the piston rod is for the mode of whole rifle motion, controls the volume change of the inside air of liquid-transfering gun, and then realizes the liquid-transfering demand to the liquid of different volumes. Meanwhile, a multi-group gear carry structure is adopted for displaying the moving amount of the liquid.

For example, chinese patent publication No. CN2704843Y discloses a micropipettor, which comprises a liquid suction rod with a liquid suction port, a nozzle driving sleeve sleeved on the liquid suction rod and having a small press hand, a handle sleeved on the nozzle driving sleeve and also serving as a housing, and a plunger piston capable of reciprocating in an inner cavity, wherein the inner cavity of the micropipettor is divided into a front chamber and a rear chamber, and the two chambers are separated by an O-ring; the liquid absorbing rod is communicated with the front bin, the plunger is arranged between the front bin and the rear bin and is fixedly arranged on a quantity adjusting screw rod positioned in the inner cavity, the quantity adjusting screw rod is screwed into an adjusting nut and is embedded into the handle, and the adjusting nut can axially reciprocate in a sliding groove arranged in the handle; the front end of the quantity adjusting screw rod is provided with a middle spring, the rear end of the quantity adjusting screw rod is provided with a spring and is screwed into the adjusting screw sleeve, the quantity adjusting screw rod is sleeved with a counter, the front side of the handle is provided with a reading window corresponding to the counter, and the quantity adjusting screw rod can move and rotate along the axis of the quantity adjusting screw rod in the inner cavity of the liquid transfer device.

However, this type of design has some disadvantages: firstly, in a liquid-transfering gun with a small-range specification model, the precision requirement for transferring liquid is higher, the precision requirement for key parts of a liquid-transfering structure is stricter, and for example, the precision requirement for the size of a piston rod of the liquid-transfering gun with a 2ul range reaches +/-0.002 mm; secondly, because of the randomness of the operation of the operators and the failure of effective control, the assembled finished product liquid-transfering gun has random errors in assembly. These two objective factors result in the fact that the actual range of liquid removed by the pipette cannot be precisely matched to the display structure.

Therefore, in order to solve the problems in the prior art, it is necessary to provide a reading structure and a calibration structure for a pipette, which are capable of accurately pipetting a liquid in a small-range pipette.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the problem that above-mentioned prior art exists, provided a reading structure and calibration structure for liquid-transfering gun, adopted gear free meshing and isolating construction, solved the problem that the liquid-transfering gun accuracy of small-scale journey moved and got liquid, made this reading structure and calibration structure also can be applicable to a large amount of journey liquid-transfering gun.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a reading structure for a pipette, the reading structure comprising a drive gear, a bracket, a gear assembly, an incrementing assembly, and a reading assembly;

the driving gear is connected with the bracket and rotates relative to the bracket;

the bracket is provided with a cavity for placing the gear assembly, the boosting assembly and the reading assembly;

the gear assembly comprises a gear shaft body, a first transmission gear and a second transmission gear, wherein the first transmission gear and the second transmission gear are respectively fixed at two ends of the gear shaft;

the promoting assembly comprises a promoting shaft body, a promoting gear set and a pawl; the enhancing gear set and the pawl are sleeved on the enhancing shaft body, and the pawl is positioned below the enhancing gear set; the step-up gear set comprises a plurality of step-up gears;

the reading assembly comprises a shaft body, and a digital gear set, a ratchet wheel, a clutch gear and a spring which are sequentially sleeved on the shaft body from top to bottom; the clutch gear is configured to be supported by the spring; the clutch gear includes a first saw tooth at an upper end portion and a second saw tooth at a lower end portion, and the first saw tooth is configured to be engaged with a ratchet sheave;

the digital gear set comprises a plurality of digital gears, the digital gears are structurally characterized in that a display area is arranged in the middle of each digital gear, and two ends of each digital gear are respectively a notch end and a gear end;

the ratchet wheel is structurally characterized in that a display area is arranged in the middle of the ratchet wheel, and two ends of the ratchet wheel are respectively a notch end and a gear end;

one or more notches are arranged at the notch end of the digital gear and the notch end of the ratchet grooved wheel;

the digital gear display area and the ratchet groove wheel display area are marked with a plurality of numbers;

the driving gear is configured to be meshed with the first transmission gear so that the driving gear is in rotating connection with the gear assembly;

specifically, when the driving gear rotates, the first transmission gear rotates to drive the gear shaft body to rotate around the axis of the gear shaft body in the support cavity, so that the second transmission gear is driven to rotate.

The second transmission gear is configured to be meshed with the second saw teeth of the clutch gear;

the pawl is configured to be connected with a ratchet and grooved gear end, so that the pawl and the ratchet and grooved gear form a ratchet mechanism;

the digital gear set and the boosting gear set are matched to rotate, a boosting gear is connected between every two adjacent digital gears, so that the upper end parts of the boosting gears are meshed with the gear end of one of the digital gears, and the lower end parts of the boosting gears are rotationally connected with the notch end of the other digital gear;

an enhancing gear is connected between the adjacent ratchet groove wheel and the digital gear, the lower end part of the enhancing gear is rotationally connected with the notch end of the ratchet groove wheel, and the upper end part of the enhancing gear is connected with the gear end of the digital gear;

specifically, when the driving gear rotates, the gear assembly rotates along with the driving gear, and the clutch gear drives the ratchet wheel to rotate; when the ratchet-grooved wheel rotates to a certain phase angle, the notch at the notch end stirs the promoting gear connected with the ratchet-grooved wheel, so that the promoting gear rotates by one tooth number and drives the digital gear connected with the promoting gear to rotate, and the number on the digital gear changes, namely, carries.

In some embodiments, the step-up gear set includes three step-up gears, in order, a first step-up gear, a second step-up gear, and a third step-up gear; the digital gear sets comprise three digital gears which are respectively a first digital gear, a second digital gear and a third digital gear in sequence; wherein the third digital gear is adjacent to the ratchet-grooved wheel; the lower end part of the third boosting gear is configured to be rotationally connected with the notch end of the ratchet wheel, and the upper end part of the third boosting gear is configured to be meshed with the gear end of the third digital gear; the lower end part of the second boosting gear is configured to be rotationally connected with the notch end of the third digital gear, and the upper end part of the second boosting gear is configured to be meshed with the gear end of the second digital gear; the lower end of the first incremental gear is configured to be rotationally connected with the notch end of the second digital gear, and the upper end of the first incremental gear is configured to be meshed with the gear end of the first digital gear.

In some embodiments, the number of the number gear display area is the same as the number of teeth at the gear end thereof, and the number of the ratchet-groove gear display area is the same as the number of teeth at the gear end thereof.

In some embodiments, the number of the number gear display area and the number of teeth at the gear end are both ten, and the number of the ratchet-groove gear display area and the number of teeth at the gear end are both ten.

As above, if the ten numbers in the display areas of the digital gear and the ratchet grooved wheel are all "0123456789", both the notched end of the digital gear and the notched end of the ratchet grooved wheel are provided with a notch;

specifically, the pawl is buckled on the ratchet wheel, so that resistance is different when the ratchet wheel rotates to different positions, and the rotation of the whole reading structure is interrupted; when the number of teeth of the ratchet-grooved wheel is ten, ten pause and contusion can occur when the ratchet-grooved wheel rotates for one circle, each pause and contusion point corresponds to a number of 0123456789, numbers corresponding to initial positions of the ratchet-grooved wheel, the third digital gear, the second digital gear and the first digital gear are all '0', namely '0000' on a display window of the liquid-moving gun; after the ratchet wheel rotates for pi/5 degrees, the first pause appears, and the number corresponding to the ratchet wheel is 1 at the moment. By analogy, after the ratchet wheel rotates by 2 pi degrees, namely, the ratchet wheel rotates by one circle, the notch at the notch end of the ratchet wheel stirs the third enhancement gear to rotate so as to drive the third digital gear to rotate by pi/5 degrees, at the moment, the number corresponding to the third digital gear is '1', the number corresponding to the ratchet wheel returns to '0', and the digital carry of the ratchet wheel and the third digital gear is realized. Similarly, the number of the third digital gear is "0123456789", and the end of the notch is provided with a notch, when the third digital gear finishes one turn, the notch can shift the second increaser gear, and then the second increaser gear drives the second digital gear to carry; in view of this principle, the matching between the second digital gear and the first enhanced gear and the matching between the first enhanced gear and the first digital gear are similar and will not be described again.

As above, if the ten numbers in the display area of the ratchet grooved wheel are '0246802468', two symmetrical notches are arranged at the notch end of the ratchet grooved wheel;

specifically, the structure principle is similar to the structure principle; when the number of teeth of the ratchet-grooved wheel is ten and the number is 0246802468, ten pause and contusion can occur when the ratchet-grooved wheel rotates for one circle, each pause and contusion point corresponds to the number 0246802468 respectively, the numbers of the third digital gear, the second digital gear and the first digital gear are 0123456789 respectively, and the numbers corresponding to the initial positions of the third digital gear, the second digital gear and the first digital gear are 0 respectively, namely 0000 is formed on a display window of the pipette gun; when the ratchet groove wheel rotates for a circle, the two notches successively shift the third enhancing gear, so that the third enhancing gear drives the third digital gear to carry from '0' to '1' and then to '2'; and the digital carry of the ratchet groove wheel and the third digital gear is realized. The other advancing gears have the same carry principle as the digital gear, and are not described in detail.

As above, if the ten numbers in the display area of the ratchet grooved wheel are '0505050505', five notches are uniformly distributed at the notched end of the ratchet grooved wheel;

preferably, the driving gear is connected with the bracket in a buckling mode.

The technical scheme principle of the reading structure is as follows: when the driving gear rotates, the first transmission gear and the second transmission gear are driven to rotate together, the clutch gear and the ratchet groove wheel are further driven to rotate together, the boosting gear set and the digital gear set rotate along with the rotation of the ratchet groove wheel, and therefore digital carry is achieved.

The utility model also provides a calibration structure for the pipette, which comprises the reading structure, a pipette shell and a calibration component;

the reading structure is arranged in the shell of the pipette;

a window is arranged on the casing of the pipette gun, and the display areas of the digital gear set and the ratchet wheel of the reading structure are arranged to be opposite to the window so as to read the numbers through the window;

a through calibration hole is formed in the pipette shell and used for the calibration component to pass through;

the clutch gear is provided with a calibration step;

specifically, the calibration step serves as a force receiving end and is used for receiving the thrust of the calibration member, so that the clutch gear is disengaged from the ratchet wheel.

When the calibration member enters the shell of the pipette through the calibration hole, the calibration step of the clutch gear is pushed downwards by the calibration member so as to separate the clutch gear from the ratchet groove wheel.

Preferably, the alignment member comprises an alignment end and a hand-held end, the alignment end is used for applying force to the clutch gear alignment step;

in the above, the contact end surface of the calibration end and the calibration step is set to be an inclined surface.

In particular, the inclined alignment end face, which better exerts a thrust force on the alignment step.

The principle of the technical scheme of the calibration structure is as follows: in the reading structure, the driving gear, the first transmission gear and the second transmission gear are used for adjusting the phase essentially, so that the driving gear, the first transmission gear and the second transmission gear can be collectively called as a phase gear set; the ratchet wheel, the boosting gear set and the digital gear set are matched for reading, so that the ratchet wheel, the boosting gear set and the digital gear set are called a reading gear set. When the calibration member is inserted through the calibration hole on the shell, the calibration member applies downward thrust to the calibration step of the clutch gear, so that the clutch gear moves downward, and the spring is stressed and compressed to disconnect the clutch gear from the saw teeth of the ratchet wheel in a matching way; at the moment, the driving gear is rotated, the phase gear set can rotate to different phases, but at the moment, the clutch gear is disconnected with the ratchet groove wheel, and the reading gear set cannot rotate along with the clutch gear, so that the corresponding relation between the phases of the phase gear set and the readings of the reading gear set is adjusted, and the aim of calibrating the liquid-transfering gun is fulfilled.

The utility model has the advantages that:

the utility model provides a reading structure and calibration structure for liquid-transfering gun, its technical scheme adopts gear free meshing and separation structure, solves the problem that the liquid is transferred to the liquid-transfering gun of small range accuracy, makes this reading structure and calibration structure also can be applicable to the liquid-transfering gun of large range; meanwhile, an original fixed structure is changed into a flexible structure capable of being freely adjusted, the precision requirement on key parts is reduced to a certain extent, the assembly difficulty is reduced, and the display reading is matched with the actual liquid displacement amount accurately by matching with a calibration component.

Drawings

Fig. 1 is an exploded schematic view of a reading structure provided in embodiment 1 of the present invention;

fig. 2 is a schematic structural diagram of a reading structure provided in embodiment 1 of the present invention;

fig. 3 is a schematic cross-sectional view of a reading structure provided in embodiment 1 of the present invention;

fig. 4 is a schematic view of an enhancement assembly of a reading structure according to embodiment 1 of the present invention;

fig. 5 is a schematic structural diagram of a reading assembly of a reading structure provided in embodiment 1 of the present invention;

fig. 6 is a schematic diagram of a calibration structure provided in embodiment 2 of the present invention;

fig. 7 is a schematic cross-sectional view of a calibration structure provided in embodiment 2 of the present invention;

fig. 8 is a schematic structural view of a clutch gear of the calibration structure provided in embodiment 2 of the present invention;

fig. 9 is a schematic structural diagram of a calibration member of a calibration structure provided in embodiment 2 of the present invention.

Description of the reference numerals

1, a driving gear, 2 a bracket, 3a gear assembly, 4 an enhancing assembly, 5 a reading assembly, 6 a pipette shell and 7 a calibrating component;

21 a cavity;

a gear shaft body 31, a first transmission gear 32 and a second transmission gear 33;

41 boost shaft, 42 boost gear set, 43 pawl, 421 first boost gear, 422 second boost gear, 423 third boost gear;

51 shaft, 52 digital gear set, 53 ratchet wheel, 54 clutch gear, 55 spring;

521 first digital gear, 522 second digital gear, 523 third digital gear; 53a notched end, 53b gear end; 541 a first serration, 542 a second serration, 543 a calibration step;

window 61, alignment hole 62;

71a calibration end, 72 a hand-held end.

Detailed Description

The following describes the present invention with reference to the accompanying drawings.

Example 1

One embodiment of the present invention, as shown in fig. 1 to 5, provides a reading structure for a pipette, the reading structure includes a driving gear 1, a bracket 2, a gear assembly 3, an enhancing assembly 4 and a reading assembly 5;

the driving gear 1 is connected with the bracket 2 in a buckling mode and rotates relative to the bracket 2;

the bracket 2 is provided with a cavity 21 for placing the gear assembly 3, the promotion assembly 4 and the reading assembly 5;

the gear assembly 3 comprises a gear shaft body 31, and a first transmission gear 32 and a second transmission gear 33 which are respectively fixed at two ends of the gear shaft;

the increaser assembly 4 comprises an increaser shaft body 41, an increaser gear set 42 and a pawl 43; the enhancing gear set 42 and the pawl 43 are sleeved on the enhancing shaft body 41, and the pawl 43 is positioned below the enhancing gear set 42; the boosting gear group 42 comprises three boosting gears, namely a first boosting gear 421, a second boosting gear 422 and a third boosting gear 423;

the reading assembly 5 comprises a shaft body 51, and a digital gear set 52, a ratchet groove wheel 53, a clutch gear 54 and a spring 55 which are sequentially sleeved on the shaft body 51 from top to bottom; the clutch gear 54 is configured to be supported by the spring 55; the clutch gear 54 includes a first saw tooth 541 at an upper end portion and a second saw tooth 542 at a lower end portion, and the first saw tooth 541 is configured to be engaged with the ratchet pulley 53;

the digital gear set 52 comprises three digital gears, namely a first digital gear 521, a second digital gear 522 and a third digital gear 523 in sequence; each digital gear is structurally characterized in that a display area is arranged in the middle of each digital gear, and two ends of each digital gear are respectively a notch end and a gear end; wherein, the display area of each digital gear is marked with a number "0123456789";

the ratchet wheel 53 is structurally characterized in that a display area is arranged in the middle of the ratchet wheel, and a notch end 53a and a gear end 53b are respectively arranged at two ends of the ratchet wheel; the ratchet wheel display area is numbered "0246802468".

In the embodiment, the numbers of the display areas of the digital gears 521-523 are all '0123456789', so that the notch end is provided with a notch; the number of the ratchet wheel display area is '0246802468', and the notch ends 53a of the ratchet wheel are provided with two symmetrical notches;

the driving gear 1 is configured to be meshed with the first transmission gear 32, so that the driving gear 1 is rotatably connected with the gear assembly 3;

specifically, when the driving gear 1 rotates, the first transmission gear 32 rotates to drive the gear shaft 31 to rotate around its axis in the bracket cavity 21, so as to drive the second transmission gear 33 to rotate.

The second transmission gear 33 is configured to mesh with the second saw teeth 542 of the clutch gear 54;

the pawl 43 is configured to be connected with the gear end of the ratchet grooved wheel 53, so that the pawl 43 and the ratchet grooved wheel 53 form a ratchet mechanism;

the digital gear set 52 and the incremental gear set 42 rotate cooperatively, in this embodiment, the third digital gear 523 is adjacent to the ratchet sheave 53; the lower end of the third increaser gear 423 is configured to be rotatably connected with the notch end 53a of the ratchet-grooved wheel 53, and the upper end thereof is configured to be meshed with the gear end of the third digital gear 523; the lower end part of the second increaser gear 422 is configured to be rotationally connected with the notch end of the third digital gear 523, and the upper end part is configured to be meshed with the gear end of the second digital gear 522; the lower end of the first incremental gear 421 is configured to be rotatably connected to the notched end of the second digital gear 522, and the upper end thereof is configured to be engaged with the gear end of the first digital gear 521.

Specifically, when the driving gear 1 rotates, the gear assembly 2 rotates along with the driving gear, and the clutch gear 54 drives the ratchet wheel 53 to rotate; when the ratchet-grooved wheel 53 rotates to a certain phase angle, the notch of the notch end 53a pulls the third incremental gear 423 connected thereto, so that the incremental gear 423 rotates by one tooth number, and drives the third digital gear 523 connected to the third incremental gear 423 to rotate, so that the number on the third digital gear 523 changes, i.e., "carries".

In some embodiments, the number of teeth at the gear ends of the number gears 521, 522, 523 is ten and the number of teeth of the ratchet-toothed ring 54 is ten.

Specifically, as the pawl 43 is buckled on the ratchet wheel 53, the resistance is different when the ratchet wheel 53 rotates to different positions, and the rotation of the whole reading structure is interrupted; when the number of the ratchet wheel 53 is ten, ten setbacks can appear when the ratchet wheel rotates for one circle, each setback point corresponds to a number "0246802468", and the numbers corresponding to the initial positions of the ratchet wheel 53, the third digital gear 523, the second digital gear 522 and the first digital gear 521 are all "0", namely "0000" on the display window of the pipette; the ratchet wheel 53 is rotated by an angle of pi/5 to generate a first pause, and the corresponding number of the ratchet wheel 53 is "2". By analogy, after the ratchet-grooved wheel 53 rotates by 2 pi angle, that is, rotates by one circle, the notch of the notched end 53a of the ratchet-grooved wheel stirs the third incremental gear 423 to rotate, and further drives the third digital gear 523 to rotate by pi/5 angle, at this time, the number corresponding to the third digital gear 523 is "1", the number corresponding to the ratchet-grooved wheel 53 returns to "0", and the digital carry of the ratchet-grooved wheel 53 and the third digital gear 523 is realized. Similarly, the number of the third digital gear 523 is "0123456789", and the end of the notch is provided with a notch, when the third digital gear 523 rotates one turn, the notch will shift the second increaser gear 422, and then the second increaser gear 422 drives the second digital gear 522 to carry; in view of this principle, the cooperation between the second digital gear 522 and the first incremental gear 421, and the cooperation between the first incremental gear 421 and the first digital gear 521 are similar and will not be described in detail.

Example 2

One of the embodiments of the present invention is shown in fig. 6 to 9, and the main technical solution of this embodiment is basically the same as that of embodiment 1, and the unexplained features in this embodiment adopt the explanation of embodiment 1, which is not repeated herein. This example differs from example 1 in that:

this embodiment provides a calibration structure for a pipette comprising the reading structure of embodiment 1, a pipette housing 6, and a calibration member 7;

the reading structure is arranged in the pipette shell 6;

a window 61 is arranged on the pipette shell 6, and the display areas of the digital gear set 52 and the ratchet groove wheel 53 of the reading structure are arranged to be opposite to the window 61, so that the numbers are read through the window 61;

a through calibration hole 62 is formed in the pipette shell 6 and used for the calibration member 7 to pass through;

the clutch gear 54 is provided with a calibration step 543;

specifically, the alignment step 543 serves as a force receiving end for receiving the pushing force of the alignment member 7, so that the clutch gear 54 is disengaged from the ratchet groove wheel 53.

When the alignment member 7 enters the pipette housing 6 through the alignment hole 62, the alignment step 543 of the clutch gear 54 is pushed downward by the alignment member 7 to disengage the clutch gear 54 from the ratchet pulley 53.

The alignment member 7 comprises an alignment end 71 and a handheld end 72, wherein the alignment end 71 is used for applying force to the clutch gear alignment step 543; the contact end surface of the calibration end 71 and the calibration step 543 is set as an inclined surface 71 a.

Specifically, the inclined alignment end 71 end surface, which better applies a pushing force against the alignment step 543.

The principle of the technical scheme of the calibration structure is as follows: in the reading structure, the driving gear 1, the first transmission gear 32 and the second transmission gear 33 are used for adjusting the phase essentially, so the three can be collectively called as a phase gear set; the ratchet wheel 53, the multiplier gear set 42, and the digital gear set 52 cooperate to provide a reading, and may be referred to as a reading gear set. When the aligning member 7 is inserted through the aligning hole 62 of the housing, the aligning member 7 applies a downward pushing force to the aligning step 543 of the clutch gear, thereby moving the clutch gear 54 downward, and the spring 55 is compressed by a force, so that the clutch gear 54 is disengaged from the serration of the ratchet groove wheel 53; at this time, the driving gear 1 is rotated, the phase gear set can rotate to different phases, but at this time, the clutch gear 54 is disconnected from the ratchet groove wheel 53, and the reading gear set cannot rotate along with the clutch gear, so that the corresponding relation between the phase of the phase gear set and the reading of the reading gear set is adjusted, and the purpose of calibrating the liquid-transferring gun is achieved.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A reading structure for a pipette, the reading structure comprising a drive gear, a bracket, a gear assembly, an increaser assembly, and a reading assembly;

an enhancing gear is connected between the adjacent ratchet groove wheel and the digital gear, the lower end part of the enhancing gear is rotationally connected with the notch end of the ratchet groove wheel, and the upper end part of the enhancing gear is connected with the gear end of the digital gear.

2. The reading structure of claim 1, wherein the incrementing gear set comprises three incrementing gears, in turn being a first incrementing gear, a second incrementing gear, and a third incrementing gear, respectively;

the digital gear sets comprise three digital gears which are respectively a first digital gear, a second digital gear and a third digital gear in sequence; wherein the third digital gear is adjacent to the ratchet-grooved wheel.

3. The reading structure of claim 2, wherein the third incremental gear has a lower end configured to be rotationally coupled to the notched end of the ratchet wheel and an upper end configured to engage the gear end of the third digital gear;

the lower end part of the second boosting gear is configured to be rotationally connected with the notch end of the third digital gear, and the upper end part of the second boosting gear is configured to be meshed with the gear end of the second digital gear;

the lower end of the first incremental gear is configured to be rotationally connected with the notch end of the second digital gear, and the upper end of the first incremental gear is configured to be meshed with the gear end of the first digital gear.

4. The reading structure according to claim 1, wherein the number of the number gear display area is the same as the number of teeth at the gear end thereof, and the number of the ratchet-grooved gear display area is the same as the number of teeth at the gear end thereof.

5. The reading structure according to claim 4, wherein the number of the number gear display area and the number of teeth at the gear end are ten, and the number of the number ratchet groove gear display area and the number of teeth at the gear end are ten.

6. The reading structure of claim 5, wherein if the ten numbers of the digital gear and the ratchet-grooved wheel display area are all "0123456789", a notch is arranged at each of the notched end of the digital gear and the notched end of the ratchet-grooved wheel.

7. The reading structure of claim 5, wherein if the ten numbers of the ratchet-grooved wheel display area are "0246802468", the notched end of the ratchet-grooved wheel is provided with two symmetrical notches.

8. The reading structure according to claim 5, wherein if the ten numbers of the ratchet-grooved wheel display area are "0505050505", the notched end of the ratchet-grooved wheel is provided with five uniformly distributed notches.

9. A calibration structure for a pipette comprising a reading structure according to any of claims 1 to 8, a pipette housing and a calibration member;

the reading structure is arranged in the shell of the pipette; a window is arranged on the casing of the pipette gun, and the display areas of the digital gear set and the ratchet wheel of the reading structure are arranged to be opposite to the window so as to read the numbers through the window;

the clutch gear is provided with a calibration step;

10. The alignment structure of claim 9 wherein the alignment member comprises an alignment end and a hand-held end; the contact end face of the calibration end and the calibration step is an inclined plane.