CN111482209B - Multi-range homobody pipette and pipette - Google Patents
Multi-range homobody pipette and pipette Download PDFInfo
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- CN111482209B CN111482209B CN202010376955.2A CN202010376955A CN111482209B CN 111482209 B CN111482209 B CN 111482209B CN 202010376955 A CN202010376955 A CN 202010376955A CN 111482209 B CN111482209 B CN 111482209B
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- plunger
- pipette
- injection cavity
- multirange
- sleeve
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
- B01L3/0224—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type having mechanical means to set stroke length, e.g. movable stops
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/021—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids
- B01L3/0217—Pipettes, i.e. with only one conduit for withdrawing and redistributing liquids of the plunger pump type
- B01L3/0227—Details of motor drive means
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- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a multirange homobody pipette and a pipette, which comprises: the liquid suction barrel is provided with a liquid suction opening, and a first injection cavity communicated with the liquid suction opening is formed in the liquid suction barrel; the plunger assembly is slidably inserted into the first injection cavity, liquid is sucked into or discharged from the first injection cavity through the plunger assembly, the plunger assembly comprises a plunger rod and at least one plunger sleeve sleeved on the outer side of the plunger rod, a second injection cavity is formed in the innermost plunger sleeve, the volume of the second injection cavity is smaller than that of the first injection cavity, the plunger rod can be slidably inserted into the second injection cavity, and the liquid is sucked into or discharged from the second injection cavity through the plunger rod; the pipettes comprise multirange alike pipettes. According to the invention, the plunger assembly adopts a coaxial nested structure, so that the pipette has various measuring ranges for selection, any hardware module is not required to be replaced when the measuring ranges are required to be changed in operation, the uncertainty of the pipette in different measuring range ranges can be ensured, and the working efficiency is greatly improved.
Description
Technical Field
The invention relates to the technical field of pipetting, in particular to a multi-range homobody pipette and a pipette.
Background
In detection work in the fields of medicine, food, biology and the like, a plurality of pretreatment works such as pipetting, sampling, mixing and the like are required to be carried out on biological materials and samples (usually in liquid state), and a pipettor is required to be used in pipetting.
Disclosure of Invention
The invention aims to provide a multi-range homobody pipette and a pipette, which are used for solving the problems that the operation of changing the range is complex and the operation efficiency is influenced in the prior art.
To achieve the above object, the present invention provides a multirange homobody pipette comprising: a liquid suction barrel, which is provided with a liquid suction opening, wherein a first injection cavity communicated with the liquid suction opening is formed in the liquid suction barrel; the plunger assembly is slidably inserted into the first injection cavity, liquid is sucked into or discharged from the first injection cavity through pushing and pulling the plunger assembly, the plunger assembly comprises a plunger rod and at least one plunger sleeve sleeved on the outer side of the plunger rod, a second injection cavity is formed in the innermost plunger sleeve, the volume of the second injection cavity is smaller than that of the first injection cavity, the plunger rod is slidably inserted into the second injection cavity, and liquid is sucked into or discharged from the second injection cavity through pushing and pulling the plunger rod.
The multi-range isobody pipette comprises a plurality of plunger sleeves, wherein the plunger sleeves are sequentially nested from inside to outside, the innermost plunger sleeve is a first plunger sleeve, the second injection cavity is formed in the first plunger sleeve, each plunger sleeve positioned outside the first plunger sleeve is a second plunger sleeve, a third injection cavity is respectively formed in each second plunger sleeve, the volume of each third injection cavity is smaller than that of the first injection cavity and larger than that of the second injection cavity, and liquid is sucked into or discharged out of the third injection cavity by pushing and pulling all plunger sleeves and plunger rods positioned in the third injection cavity.
The multirange homobody pipette as described above, wherein the number of the second plunger sleeves is one, the second plunger sleeve is in sliding fit with the inner side wall of the pipette barrel, and the first plunger sleeve is in sliding fit with the inner side wall of the second plunger sleeve.
The multirange homobody pipette as described above, wherein the number of the second plunger sleeves is two or more, each of the second plunger sleeves is sequentially nested from inside to outside, the outermost second plunger sleeve is slidably fitted with the inner side wall of the pipette, and the first plunger sleeve is slidably fitted with the inner side wall of the innermost second plunger sleeve.
A multirange aligmer pipette as described above wherein any one of said plunger sleeves is capable of moving the plunger sleeve and plunger rod located inside thereof in a direction away from said pipetting opening.
The multi-range homobody pipette comprises a pipette body, wherein the pipette body is provided with a pipette opening, the pipette rod is provided with a pipette opening, the pipette opening is provided with a pipette head, the pipette rod is provided with a pipette sleeve, the pipette sleeve is provided with a pipette head, the pipette rod is provided with a pipette opening, the pipette sleeve is provided with a pipette rod, the pipette rod is provided with a pipette sleeve, the pipette rod is provided with a plunger rod, the pipette sleeve is respectively extended from the upper end of the pipette body, the pipette rod is respectively connected with an operation head, the pipette rod is provided with the pipette head and the pipette sleeve which is sequentially sleeved from inside to outside, the pipette head is sequentially arranged correspondingly from top to bottom, and when any one of the pipette heads moves upwards in a direction away from the pipette opening.
A multirange isopipette as described above wherein the operating head is a disk-like structure disposed radially of the plunger assembly.
The invention also provides a pipette which comprises the multi-range homobody pipette.
The pipette as described above, wherein the pipette is an electric pipette, and the pipette further includes a range selector and a reciprocating mechanism, where the reciprocating mechanism is connected to the range selector and is capable of driving the range selector to reciprocate along an axial direction of the multirange homopipette, and the range selector is separately connected to a plunger rod and each plunger sleeve of the multirange homopipette and is capable of driving one or more of the plunger rod and the plunger sleeve to reciprocate along the axial direction of the multirange homopipette.
The pipette as described above, wherein the pipette is a manual pipette.
The multi-range homobody pipette and the pipette have the characteristics and advantages that:
1. The plunger assembly adopts a coaxial nested structure, so that the multirange homobody pipette is internally provided with at least a first injection cavity and a second injection cavity, the volume of the second injection cavity is smaller than that of the first injection cavity, the corresponding range of the first injection cavity is larger, and the corresponding range of the second injection cavity is smaller, thereby the multirange homobody pipette provided by the invention has various ranges for selection; when the measuring range is required to be changed in operation, a first injection cavity with a large measuring range is selected by the push-pull plunger assembly, a second injection cavity with a small measuring range is selected by the push-pull plunger rod, the measuring range changing operation is very simple and convenient, any hardware module is not required to be replaced, the uncertainty of liquid transfer of the device can be ensured in different measuring range ranges, and the working efficiency is greatly improved;
2. The first injection cavity and the second injection cavity are formed by the plunger sleeve and the liquid suction cylinder which are nested inside and outside, namely, the second injection cavity occupies the inner space of the first injection cavity, and the invention has simple and compact structure, small volume and convenient processing and manufacturing;
3. the multirange homobody pipette can be operated in an electric mode or a manual mode, and has wide application range.
Drawings
The following drawings are only for purposes of illustration and explanation of the present invention and are not intended to limit the scope of the invention. Wherein:
FIG. 1 is a schematic view of one embodiment of a multirange isopipette of the present invention;
Fig. 2 is a schematic view of another embodiment of a multirange isopipette of the present invention;
FIG. 3 is a schematic illustration of the cooperation of a multirange isopipette and a range selector in a pipette of the present invention;
Fig. 4 is a partial enlarged view at a in fig. 3.
Reference numerals for main elements:
1. a liquid suction cylinder; 11. a liquid suction port; 12. a plug end; 121. an annular clamping groove; 122. an annular step;
2. A plunger assembly; 21. a plunger rod; 22. a first plunger sleeve; 23. a second plunger sleeve; 24. an operation head;
3. a range selector; 31. a connecting piece; 4. a screw;
100. a pipetting head; 101. an annular protrusion.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present invention, a specific embodiment of the present invention will be described with reference to the accompanying drawings. Wherein the use of the adjective or adverb modifiers "upper" and "lower," "top" and "bottom," "inner" and "outer" are merely for convenience of relative reference between groups of terms, and do not describe any particular directional limitation on the modified term. In addition, the terms "first," "second," etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," etc. may explicitly or implicitly include one or more such features. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1, the invention provides a multi-range homobody pipette, which comprises a liquid suction tube 1 and a plunger assembly 2, wherein the liquid suction tube 1 is cylindrical, the liquid suction tube 1 is provided with a liquid suction opening 11, a first injection cavity communicated with the liquid suction opening 11 is formed inside the liquid suction tube 1, the first injection cavity can also be called a first plunger cavity, the plunger assembly 2 can be slidably inserted into the first injection cavity, liquid is sucked into or discharged out of the first injection cavity through pushing and pulling the plunger assembly 2, liquid suction is realized, the plunger assembly 2 comprises a plunger rod 21 and at least one plunger sleeve sleeved outside the plunger rod 21, namely the plunger sleeve 21 and the plunger sleeve are coaxially nested in sequence from inside to outside, and when the plunger assembly 2 comprises one plunger sleeve, the inner wall and the outer wall of the plunger sleeve are respectively in sliding fit with the plunger rod 21 and the liquid suction tube 1; when the plunger assembly 2 comprises a plurality of plunger sleeves, the plurality of plunger sleeves are sequentially nested from inside to outside; the innermost plunger sleeve (i.e. the plunger sleeve in direct contact with the plunger rod 21) forms a second injection cavity, which may also be referred to as a second plunger cavity, the volume of which is smaller than that of the first injection cavity, and the plunger rod 21 is slidably inserted in the second injection cavity, and liquid is sucked into or discharged from the second injection cavity by pushing and pulling the plunger rod 21, so that liquid is sucked in, and liquid transfer is realized.
The plunger component adopts a coaxial nested structure, so that the multirange homobody pipette is internally provided with at least a first injection cavity and a second injection cavity, the volume of the second injection cavity is smaller than that of the first injection cavity, the corresponding range of the first injection cavity is larger (called a large range for short), and the corresponding range of the second injection cavity is smaller (called a small range for short), thereby the multirange homobody pipette provided by the invention has various ranges for selection; when the range is required to be changed in operation, a first injection cavity with a large range is selected by the push-pull plunger assembly 2, a second injection cavity with a small range is selected by the push-pull plunger rod 21, the range changing operation is very simple and convenient, any hardware module is not required to be replaced, the uncertainty of liquid transfer of the device can be ensured in different range ranges, and the working efficiency is greatly improved;
in addition, the first injection cavity and the second injection cavity are formed by the plunger sleeve and the liquid suction cylinder which are nested inside and outside, namely, the second injection cavity occupies the inner space of the first injection cavity, and the injection device has the advantages of simple and compact structure, small volume, low cost and convenience in processing and manufacturing.
As shown in fig. 2, in one embodiment, the plurality of plunger sleeves are sequentially nested from inside to outside, the innermost plunger sleeve is a first plunger sleeve 22, a second injection cavity is formed in the first plunger sleeve 22, each plunger sleeve positioned outside the first plunger sleeve 22 is a second plunger sleeve 23, third injection cavities are respectively formed in each second plunger sleeve 23, that is, the number of the second plunger sleeves 23 is at least one, the number of the third injection cavities is at least one, and the third injection cavities can also be called as third plunger cavities; the volume of each third injection chamber is smaller than the volume of the first injection chamber and larger than the volume of the second injection chamber, and liquid is sucked into or discharged from the third injection chamber by pushing and pulling all plunger sleeves and plunger rods 21 located in the third injection chamber.
The multirange homobody pipette of the embodiment is provided with a first injection cavity, a second injection cavity and at least one third injection cavity, the volume of each third injection cavity is smaller than that of the first injection cavity and larger than that of the second injection cavity, namely, the corresponding range of the third injection cavity is between a large range and a small range, and for convenience of description, the corresponding range of the third injection cavity is called as a medium range, so the multirange homobody pipette is provided with a large range, a small range and at least one medium range, and the multirange homobody pipette is provided with various ranges for selection; when one of the medium ranges is needed, all plunger sleeves and plunger rods 21 in the third injection cavity corresponding to the medium range are pushed and pulled to suck or discharge liquid into or from the third injection cavity, the range conversion operation is simple and convenient, the hardware module is not needed to be replaced, and the operation efficiency is improved.
As shown in fig. 2, in a first possible solution, the number of second plunger sleeves 23 is one, the second plunger sleeves 23 are slidably engaged with the inner side wall of the liquid suction barrel 1, and the first plunger sleeve 22 is slidably engaged with the inner side wall of the second plunger sleeve 23. In this solution, the multirange homobody pipette has a first injection cavity, a second injection cavity and a third injection cavity, i.e. the multirange homobody pipette has a large range, a small range and a medium range. When using the mid-range, simultaneously pushing and pulling the first plunger sleeve 22 and the plunger rod 21 in the third injection cavity; when using a wide range, the second plunger sleeve 23, the first plunger sleeve 22 and the plunger rod 21 in the first injection cavity are simultaneously pushed and pulled; when a small dose is used, the plunger rod 21 in the second injection lumen is pushed and pulled.
In a second possible technical solution, the number of the second plunger sleeves 23 is more than two, each second plunger sleeve 23 is sequentially nested from inside to outside, the outermost second plunger sleeve 23 is slidably matched with the inner side wall of the liquid suction barrel 1, and the first plunger sleeve 22 is slidably matched with the inner side wall of the innermost second plunger sleeve 23. In this embodiment, the multirange homobody pipette has a first injection cavity, a second injection cavity and at least two third injection cavities, and the volumes of the third injection cavities inside the second plunger sleeves 23 which are sequentially nested from inside to outside are sequentially increased, that is, the multirange homobody pipette has a large range, a small range and at least two middle ranges. When a certain mid-range is used, all plunger sleeves and plunger rods 21 in the third injection cavity corresponding to the mid-range are simultaneously pushed and pulled.
As shown in fig. 1 and 2, in one embodiment, any plunger sleeve can drive the plunger sleeve and the plunger rod 21 located at the inner side of the plunger sleeve to move in a direction away from the liquid absorbing port 11, that is, when one plunger sleeve is moved in a direction away from the liquid absorbing port 11 to absorb liquid, the plunger sleeve can drive all the plunger sleeves located inside the plunger sleeve and the plunger rod 21 to move together in a direction away from the liquid absorbing port 11, for example, the number of the second plunger sleeves 23 is two, when a large measuring range is used, the outermost second plunger sleeve 23 is pulled in a direction away from the liquid absorbing port 11, the second plunger sleeve 23 drives the other inner second plunger sleeve 23 to move, and the other second plunger sleeve 23 simultaneously drives the first plunger sleeve 22 at the inner side of the plunger sleeve, and the first plunger sleeve 22 simultaneously drives the plunger rod 21 at the inner side of the plunger sleeve to move, so that the whole plunger assembly 2 can be moved, and the operation is very convenient.
In a specific embodiment, as shown in fig. 1 and fig. 2, the liquid suction tube 1 has an upper end and a lower end opposite to each other, the liquid suction port 11 is disposed at the lower end of the liquid suction tube 1, the plunger rod 21 and each plunger sleeve respectively extend from the upper end of the liquid suction tube 1 and are respectively connected with an operation head 24, the operation heads of the plunger rod 21 and the operation heads of each plunger sleeve which are sequentially nested from inside to outside are sequentially disposed correspondingly from top to bottom, that is, the operation heads 24 can be sequentially propped against from top to bottom, when any operation head 24 moves upwards in a direction away from the liquid suction port 11 (i.e. when liquid is sucked), each operation head 24 above the operation head 24 is driven to move upwards, so as to drive the corresponding plunger sleeve and the plunger rod 21 to move upwards simultaneously, and of course, when any operation head 24 moves downwards in a direction close to the liquid suction port 11 (i.e. when liquid is discharged), each operation head 24 below the operation head 24 is also driven to move downwards, so as to drive the corresponding plunger sleeve and the plunger rod 21 to move downwards simultaneously.
In this embodiment, by providing the operating head 24 at the top of the plunger rod 21 and the plunger sleeve, not only the upward interlocking between the plunger sleeves and between the plunger sleeve and the plunger rod 21 but also the downward interlocking between the plunger sleeves and between the plunger sleeve and the plunger rod 21 can be achieved.
However, the present invention is not limited thereto, and the interlocking between the plunger sleeves and the plunger rod 21 may be achieved by other means of the prior art.
As shown in fig. 1 and 2, the operating head of the plunger sleeve is a radially protruding structure protruding from the outer side wall of the plunger sleeve in the radial direction of the plunger sleeve, and the operating head of the plunger rod 21 is a radially protruding structure protruding from the outer side wall of the plunger rod 21 in the radial direction of the plunger rod 21.
As shown in fig. 1 and 2, the operating head 24 is a disc-shaped structure disposed along the radial direction of the plunger assembly 2, and the diameter of the operating head is larger than the outer diameter of the plunger head or the plunger sleeve on which the operating head is disposed.
As shown in fig. 1 and 2, in one embodiment, the pipette cartridge 1 has a socket end 12 capable of being sealingly connected to the pipette head 100, and the pipette port 11 is provided at the socket end 12, and the pipette head 100 used for pipetting is usually a disposable pipette head 100. For example, the insertion end 12 and the pipetting head 100 are in interference fit, an annular clamping groove 121 and an annular step 122 are formed in the outer side wall of the insertion end 12, the annular clamping groove 121 is located below the annular step 122, an annular protrusion 101 is formed in the inner side wall of the pipetting head 100, when the pipetting head 100 and the insertion end 12 are inserted, the annular protrusion 101 is embedded into the annular clamping groove 121, and the top end of the pipetting head 100 abuts against the annular step 122.
The multirange alike pipette of the present invention can use disposable pipetting heads from 10 microliters to 1000 microliters standardized on pipetting stations.
As shown in fig. 3, the present invention also provides a pipette comprising the multirange homokinetic pipette described above.
As shown in fig. 3, in one embodiment, the pipette is an electric pipette, and further includes a range selector 3 and a reciprocating mechanism capable of reciprocating in an axial direction of the multirange homopipette, the reciprocating mechanism being connected to the range selector 3 and capable of driving the range selector 3 to reciprocate in the axial direction of the multirange homopipette, the range selector 3 being detachably connected to the plunger rod 21 and each plunger sleeve of the multirange homopipette, respectively, and capable of driving one or more of the plunger rod 21 and the plunger sleeve to reciprocate in the axial direction of the multirange homopipette to suck or discharge liquid.
Specifically, the range selector 3 is connected with the plunger rod 21 or the plunger rod 21 and the plunger sleeve which need to move according to the set range, and the range selector 3 drives the plunger rod 21 or the plunger rod 21 and the plunger sleeve which need to move to realize liquid suction and discharge under the drive of the reciprocating mechanism.
As shown in fig. 3 and 4, for example, the plunger assembly 2 includes a plunger rod 21, a first plunger sleeve 22 and a second plunger sleeve 23 which are sequentially nested from inside to outside, and when a small range is required, the range selector 3 is connected with the plunger rod 21 and separated from the first plunger sleeve 22 and the second plunger sleeve 23, and the range selector 3 only drives the plunger rod 21 to move up and down under the driving of the reciprocating mechanism so as to suck liquid; when the middle measuring range is needed, the measuring range selector 3 is connected with the plunger rod 21 and the first plunger sleeve 22 and is separated from the second plunger sleeve 23, and the plunger rod 21 and the first plunger sleeve 22 are driven by the reciprocating mechanism to move up and down by the measuring range selector 3 so as to suck liquid; when a large measuring range is needed, the measuring range selector 3 is connected with the plunger rod 21, the first plunger sleeve 22 and the second plunger sleeve 23, and the reciprocating mechanism drives the plunger rod 21, the first plunger sleeve 22 and the second plunger sleeve 23 to move up and down at the same time so as to suck liquid.
As shown in fig. 3 and 4, further, when the plunger rod 21 and the plunger sleeve are connected to an operating head 24, respectively, the range selector 3 is detachably connected to the operating head of the plunger rod 21 and the operating head of the plunger sleeve, respectively.
As shown in fig. 3 and 4, for example, the span selector 3 is located at a lateral side of the multispan isopipette, such as at a left side or a right side of the multispan isopipette, the span selector 3 has a retractable connector 31, the retraction of the connector 31 can be achieved by an electric control or a mechanical member drive capable of reciprocating in a radial direction of the multispan isopipette, the connector 31 is connected to the operating head 24, and the connector 31 can be a connecting rod or a connecting plate when the connector 31 is retracted, i.e. disconnected from the operating head 24. By arranging the operating head 24 in a disc-shaped structure, when the range selector 3 is connected with the operating head of the plunger rod 21, even if the plunger rod 21 and the plunger sleeve rotate around the axis of the plunger rod and the plunger sleeve without constraint, the range selector 3 is not unhooked, and the use is safe and reliable.
As shown in fig. 3 and 4, further, the reciprocating mechanism is located laterally of the multirange isopipette, such as to the left or right of the multirange isopipette, and the reciprocating mechanism is disposed parallel to the axial direction of the multirange isopipette. For example, the reciprocating mechanism has a screw 4, the screw 4 is disposed parallel to the axial direction of the multirange isopipette, the screw 4 is connected to the range selector 3, the range selector 3 can only move axially and cannot rotate, the range selector 3 can be guided by providing an axially extending guide rail or the like to restrict the rotation of the range selector 3, the screw 4 is driven by a motor to rotate, and the screw 4 drives the range selector 3 to reciprocate in the axial direction of the multirange isopipette by rotating. Wherein the reciprocating mechanism can be a screw 4 reciprocating mechanism of the prior art, and the invention is not limited with respect to its specific structure.
In another embodiment, the pipette is a manual pipette, i.e., the user pulls and pulls plunger rod 21 and plunger sleeve of plunger assembly 2 with the hand.
The foregoing is illustrative of the present invention and is not to be construed as limiting the scope of the invention. Any equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this invention, and are intended to be within the scope of this invention. It should be noted that, the components of the present invention are not limited to the above-mentioned overall application, and each technical feature described in the specification of the present invention may be selected to be used singly or in combination according to actual needs, so that other combinations and specific applications related to the present invention are naturally covered by the present invention.
Claims (10)
1. A multirange homobody pipette, characterized in that the multirange homobody pipette comprises:
A liquid suction barrel, which is provided with a liquid suction opening, wherein a first injection cavity communicated with the liquid suction opening is formed in the liquid suction barrel;
The plunger assembly is slidably inserted into the first injection cavity, liquid is sucked into or discharged from the first injection cavity through pushing and pulling the plunger assembly, the plunger assembly comprises a plunger rod and at least one plunger sleeve sleeved on the outer side of the plunger rod, a second injection cavity is formed in the innermost plunger sleeve, the volume of the second injection cavity is smaller than that of the first injection cavity, the plunger rod is slidably inserted into the second injection cavity, and liquid is sucked into or discharged from the second injection cavity through pushing and pulling the plunger rod.
2. The multirange isobody pipette of claim 1 wherein said plurality of plunger sleeves are nested sequentially from inside to outside, the innermost of said plunger sleeves being a first plunger sleeve in which said second injection chamber is formed, each plunger sleeve located outside of said first plunger sleeve being a second plunger sleeve in which a third injection chamber is formed, each third injection chamber having a volume less than the volume of said first injection chamber and greater than the volume of said second injection chamber, and liquid is sucked into or discharged from said third injection chamber by pushing and pulling all of said plunger sleeves and plunger rods located in said third injection chamber.
3. The multirange isopipette of claim 2 wherein the number of second plunger sleeves is one, the second plunger sleeve is in sliding engagement with an inner side wall of the pipette barrel, and the first plunger sleeve is in sliding engagement with an inner side wall of the second plunger sleeve.
4. The multirange homobody pipette of claim 2 wherein the number of said second plunger sleeves is greater than two, each of said second plunger sleeves telescoping in sequence from inside to outside, the outermost of said second plunger sleeves being in sliding engagement with the inside wall of said pipette barrel, said first plunger sleeve being in sliding engagement with the inside wall of the innermost of said second plunger sleeves.
5. The multirange isopipette of any one of claims 1-4 wherein any one of said plunger sleeves is capable of moving the plunger sleeve and plunger rod located inside thereof in a direction away from said pipette port.
6. The multirange homobody pipette of claim 5 wherein said pipette barrel has opposite upper and lower ends, said pipette port being provided at said pipette barrel lower end, said plunger rod and each of said plunger sleeves extending from said pipette barrel upper end and being respectively connected to an operating head, said plunger rod operating head and each of said plunger sleeves telescoping in sequence from inside to outside operating heads being correspondingly provided in sequence from top to bottom, any of said operating heads moving upwardly in a direction away from said pipette port driving each of said operating heads above said operating head to move upwardly.
7. The multirange isopipette of claim 6 wherein the operating head is a disk-like structure disposed radially of the plunger assembly.
8. A pipette comprising a multirange isopipette according to any one of claims 1 to 7.
9. The pipette of claim 8 wherein said pipette is an electric pipette, said pipette further comprising a range selector and a reciprocation mechanism, said reciprocation mechanism being coupled to said range selector and being capable of driving said range selector to reciprocate axially of said multirange homopipette, said range selector being detachably coupled to a plunger rod and each plunger sleeve of said multirange homopipette and being capable of driving one or more of said plunger rod and said plunger sleeve to reciprocate axially of said multirange homopipette.
10. The pipette of claim 8 wherein said pipette is a manual pipette.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376955.2A CN111482209B (en) | 2020-05-07 | 2020-05-07 | Multi-range homobody pipette and pipette |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376955.2A CN111482209B (en) | 2020-05-07 | 2020-05-07 | Multi-range homobody pipette and pipette |
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| Publication Number | Publication Date |
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| CN111482209A CN111482209A (en) | 2020-08-04 |
| CN111482209B true CN111482209B (en) | 2024-05-14 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912794A (en) * | 2008-09-12 | 2010-12-15 | 埃佩多夫股份公司 | Pipette device |
| CN102365129A (en) * | 2009-03-24 | 2012-02-29 | 恩姆菲舍尔科技公司 | pipette with tip |
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| CN212595794U (en) * | 2020-05-07 | 2021-02-26 | 普瑞麦迪（北京）实验室技术有限公司 | Multi-range consubstantial pipette and pipettor |
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2020
- 2020-05-07 CN CN202010376955.2A patent/CN111482209B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912794A (en) * | 2008-09-12 | 2010-12-15 | 埃佩多夫股份公司 | Pipette device |
| CN102365129A (en) * | 2009-03-24 | 2012-02-29 | 恩姆菲舍尔科技公司 | pipette with tip |
| CN205826354U (en) * | 2016-07-20 | 2016-12-21 | 深圳力德力诺检测应用系统有限公司 | Adjustable trace solid thief sampler |
| CN108745433A (en) * | 2018-07-23 | 2018-11-06 | 谱尼测试集团深圳有限公司 | A kind of wide-range high-precision pipettor |
| CN208839614U (en) * | 2018-09-22 | 2019-05-10 | 常州常检一诺食品检测中心有限公司 | A kind of easily operated pipette |
| CN110658350A (en) * | 2019-06-24 | 2020-01-07 | 普瑞麦迪（北京）实验室技术有限公司 | An electric pipette |
| CN212595794U (en) * | 2020-05-07 | 2021-02-26 | 普瑞麦迪（北京）实验室技术有限公司 | Multi-range consubstantial pipette and pipettor |
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| CN111482209A (en) | 2020-08-04 |
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