CN101980786B - Pipette with a knob - Google Patents
Pipette with a knob Download PDFInfo
- Publication number
- CN101980786B CN101980786B CN2009801114149A CN200980111414A CN101980786B CN 101980786 B CN101980786 B CN 101980786B CN 2009801114149 A CN2009801114149 A CN 2009801114149A CN 200980111414 A CN200980111414 A CN 200980111414A CN 101980786 B CN101980786 B CN 101980786B
- Authority
- CN
- China
- Prior art keywords
- knob
- bar
- piston
- pipette
- upper position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
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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
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/08—Ergonomic or safety aspects of handling devices
- B01L2200/087—Ergonomic aspects
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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
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/14—Process control and prevention of errors
- B01L2200/148—Specific details about calibrations
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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
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0478—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure pistons
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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
- B01L3/0275—Interchangeable or disposable dispensing tips
- B01L3/0279—Interchangeable or disposable dispensing tips co-operating with positive ejection means
Abstract
The invention relates to a pipette comprising a volume adjustment mechanism, with which the stroke of piston may changed by turning the rod. The rod (10) comprises a knob (11) having a lower position and an upper position so that when the knob is rotated, in the lower position the rod does not rotate with the knob but in the upper position it rotates. So the change of volume setting by accident is prevented.
Description
Technical field
The present invention relates to liquid and distribute and relate to a kind of pipette, wherein set the volume that will distribute by the knob of rotating piston bar.
Background technology
For example in the laboratory, come dispense liquid with the piston pipette, described pipette is included in handle top extension and has the piston rod of knob on the end.Therefore described piston can be moved by described knob.Also use this pipette, wherein therefore the length of piston aspiration stroke be also that the volume that will distribute can be set by rotating described knob.Such pipette is for example known from publication number FI 64752 (corresponding to being EP 112887).Also have the pipette of these kinds on market, wherein (the Socorex of Switzerland Socorerx Isba S.A. is freely rotated at the top of knob
Manual and Finland Thermo Fisher Scientific Oy's
F3).Therefore, when knob is exerted pressure, can not change easily volume settings unintentionally.When adjusted volume, the bottom of necessary turning knob.
Summary of the invention
Now invented pipette according to claim 1.Other claims described its some preferred embodiment.
In pipette according to the present invention, regulate and distribute volume by the rotating piston bar.On described bar, preferably on its end, have knob, described knob has lower position, and described knob freely rotates around described bar at described lower position.Therefore dispensed volume can not change in this position.But described knob can be moved to upper position from lower position, rotate together with described bar at the described knob of described upper position, therefore can regulate described volume by rotating described knob.The advantageous principal advantage of the present invention is can not change unintentionally described volume when imbibition.When regulating described volume, can easily also hold massively described knob in optimal mode.In the pipette of this technology, piston rod is typically provided with certain friction lock in order to can not rotate described bar unintentionally.Can reduce now to lock power used, take this to obtain simpler and the structure of less wear more.Due to less friction, also make adjusting easier.Also have, the knob of rotation has increased the work efficiency of pipette.
Can recognize that structure example according to the present invention is as having the zigzag part.For example described bar comprise around zigzag part and described knob comprise corresponding zigzag part, this corresponding zigzag part be positioned at the lower position of described knob described bar the zigzag part below, thereby stoped described knob with respect to the rotation of described bar in the zigzag part that upper position is connected to described bar.
In fact, described knob also comprises maintaining body, and it prevents that described knob from coming off from the end of described bar.Described locking mechanism especially stops by shape.It for example can comprise on described knob and described bar that the flange of different size, these flanges prevent that described knob breaks away from.
Described knob can comprise the locking mechanism of upper position, and this mechanism prevents that described knob is automatically moved to lower position.The described mobile power that needs at least one sizing, this power described knob of must exerting pressure.Increased like this convenience of volume-adjustment.At lower position, can be provided with locking mechanism, it prevents that described knob from moving to unintentionally upper position.Can recognize that these locking mechanisms are by means of magnet or spring.Magnet mechanism can have magnet particularly in described knob.So, although utilized two mechanisms, only need a magnet.Described magnet can be preferably toroidal magnet.
Volume is controlled to be arranged in has screw thread on piston rod, nut is housed on it, and described nut is arranged to still can slide on the length direction of housing with respect to housing is rotatable.Described housing has obstruction section, and it has determined the upper position of piston together with nut.Can know a kind of such pipette from publication document FI-64752 above-mentioned.The volume of wherein setting shows by a succession of digital rings.It comprises the dish with piston coaxial, described dish rotates together with described piston in the mode of stepping, thereby turn to the first digital rings of described digital rings string in the mode of stepping, this digital rings turns to the connection of next round etc. always after a certain amount of stride by transfer wheel.This mechanism is for example also described in WO 2005/050554 to some extent.
Description of drawings
Accompanying drawing has consisted of the part of the specification of writing of the present invention and relevant to the detailed description of the some embodiments of the present invention that present below.In these figure,
Fig. 1 shows the sectional view according to pipette of the present invention, and the knob of described bar is in lower position,
Fig. 2 a and 2b show the upper end of piston rod and the zoomed-in view of described knob, and described knob is in respectively lower position and upper position,
Fig. 3 shows the perspective view on the top of the described knob of seeing from the below,
Fig. 4 shows the perspective view of the end of the bottom of the described knob of seeing from the top and described bar.
The specific embodiment
Comprise housing 1 according to the pipette of Fig. 1, described housing 1 has point 2 in its bottom, is fixed to the tip container (for example most advanced and sophisticated) of the bottom of point.Slip tip injector cover 3 is around described point.Described cover is extended by the most advanced and sophisticated injector button 4 that is used for reducing necessary driving force, promotes described button 4 and moves (referring to FI 92374, for example corresponding to publication document EP 566939) with respect to handle by taking turns 5.The back-moving spring 6 that is used for most advanced and sophisticated injector is arranged on the side of housing.Be molded into definite shape and be arranged on housing in order to be suitable for the handle portion 7 of user's hand.Body comprises finger support member 8 at its top.
Described point 2 is equipped with circular hole, and it also continues to pass described body 1 as the hole.In described point, be provided with the piston 9 that is extended by piston rod 10.The bottom of bar be shell-like and be arranged on around piston top.The top of bar is narrower, passes described housing and extends.Knob 11 is arranged on the upper end of bar.At the place, top of described point, described hole has school extension, in its bottom, is used for the O shape ring 12 of packed-piston against described point.The O shape ring spring 13 that is arranged between housing and described point is pressed from the circulating application of the described O shape of upper direction.
Piston arm 10 comprises the adjusting screw thread that is equipped with adjusting nut 14, and longitudinally guiding spare and indentation limitations are passed through in its rotation about body.When described arm rotates, described nut therefore described arm vertically on move.Described body comprises block 15, and adjusting nut is against described block, and therefore the first spring 16 is exerted pressure from the described piston of lower direction.In other words, described adjusting nut and block have been determined the limes superiors of piston stroke.Shell-like the second support member 17 is slidably arranged in around the top of described arm, and this second support member has inner flange in its bottom.Above the second support member, the threaded engagement in calibration nut 18 and housing bore, the second spring 19 presses to calibration nut from the below with the second support member, and described the second spring 19 has the power larger than the first spring.The upper end of described bar comprises fixing thicker top cover 20, and it is arranged in described calibration nut and the second support member mobile.But the diameter that described cover has is larger than the diameter in the hole that the lower flange by the second support member forms.Therefore the limit inferior of piston stroke has been determined in the bottom of described cover together with the flange of the second support member.When liquid being sucked in described tip, piston is pressed to this limit inferior it is returned towards limes superiors.When liquid is removed from described tip, piston is further exerted pressure in order to come as far as possible liquid all to be sprayed through limit inferior against the power of the second spring.(for example having explained similar device in disclosed patent documentation FI 64752 (corresponding to EP112887) and EP737515).
The first digital rings 21 is arranged on around piston rod 10 in order to therewith rotate.The upper end face of the first digital rings comprise with ring on each reading coupling stop recess, this stops recess and projection on nonrotational ring spring 22 match (referring to FI 92374).Like this, piston rod rotates and is locked by step-by-step movement.The first digital rings is in the second digital rings 24 that is connected to above the first sprocket 23 below being positioned at, so that after each week rotation, the first digital rings is rotated a stride and arrived the second digital rings.Similarly, the second digital rings is connected with the 3rd digital rings 26 above the second sprocket 25.
The upper end of top cover 20 comprises that (Fig. 2 a), its top edge further comprises broadside flange 28 to wide cupule 27.The inwall of described cupule has the shape of opening circular cone a little.The bottom of described cupule comprises hole therebetween.The end of piston rod 10 comprises pin 29, and extend in its described hole thinner than bar itself and that pass in described cupule.The outside of described broadside flange by zigzag part 30 around.Around described cupule, have be contained in the top cap 31 and below retaining ring 32, described retaining ring is fixed to described cap.Have in the lower edge of described retaining ring the flange 33 of maintenance, slide on its internal diameter enlarged that less than the external diameter of the broadside flange of described cupule but enough large so that described retaining ring can be overlapped on top.At the lower limb of described cap, have four symmetrical downward lug bosses 34 so that described cap can slide at described cupule.In retaining ring, have corresponding four lug bosses that make progress 35 (Fig. 4), they are contained in space between lug boss on described cap.The outside of these lug bosses, the ring 36 that has circumferential groove and be mounted in it.These lug bosses have respectively circumferential groove and ring at outer circumference surface, have the ridge that installs to described groove at inner peripheral surface.The zigzag of the broadside flange of described cupule partly has interruption, thereby those lug bosses of retaining ring can be contained between those lug bosses of described cap.At the inner peripheral surface of described retaining ring, have with described cupule in the zigzag of the broadside flange maintenance zigzag part 37 of partly mating.Keeping the top edge of zigzag part is wedge shape, and when improving retaining ring with box lunch, these zigzag parts interlock suitably and lay.
When described knob 11 was in position, its underpart, therefore it also freely rotated with respect to piston rod 10 with respect to top cover 20, therefore can not change volume settings.When described knob was risen to upper position, zigzag part 30 and 37 interlockings were laid, and took this, and when knob, top cover and described bar rotate together, thereby can change volume settings.
Have ferromagnetic spill bottom ring 38 in the bottom of described cupule, it is connected between the edge and described pin 29 of described cupule.Described cap has the pin 39 of downward crawl in the middle, and toroidal magnet 40 fits to described pin 39.Above it, at the top edge of described cupule, has the ferromagnetic top loop 41 of further connection.When described knob 11 was in position, its underpart, described magnet fitted to the bottom ring, only by using enough power just described knob can be promoted.At the upper position of described knob, magnet correspondingly fits to top loop, only by using the enough power just can be with described knob to pressing down.
The lug boss 35 of retaining ring 32 comprises side direction breach 42, has corresponding zigzag part 43 (Fig. 3 and 4) in the inboard of described ring 36.Therefore can prevent the rotation of described ring.
Claims (2)
1. pipette comprises:
Housing (1), it has upper end and bottom,
Cylinder body in described housing (2), described cylinder body has the bottom of upper end and opening,
Piston in described cylinder body (9), described piston has bar in the upper end side of described cylinder body,
Mechanism utilizes this mechanism can change by rotating described bar the stroke of described piston,
It is characterized in that:
Described bar (10) comprises knob (11), described knob has lower position and upper position, thereby, when described knob, can be with described knob at the described bar of described lower position, but can be with described knob at the described bar of upper position;
Described bar comprises zigzag part (30), and described knob comprises corresponding zigzag part (37), prevents that described knob from rotating with respect to described bar in order to partly interlock in the zigzag of the described zigzag part of upper position and described correspondence;
Be provided with locking mechanism so that only by using enough large power can make described knob transfer to lower position from upper position, and so that only by using enough large power can make described knob transfer to upper position from lower position.
2. pipette according to claim 1, wherein said locking mechanism comprises magnet (40).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI20080247 | 2008-03-28 | ||
| FI20080247A FI120672B (en) | 2008-03-28 | 2008-03-28 | Pipette with bud |
| PCT/FI2009/050230 WO2009118456A1 (en) | 2008-03-28 | 2009-03-26 | Pipette with a knob |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101980786A CN101980786A (en) | 2011-02-23 |
| CN101980786B true CN101980786B (en) | 2013-06-26 |
Family
ID=39269481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801114149A Active CN101980786B (en) | 2008-03-28 | 2009-03-26 | Pipette with a knob |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2280779B1 (en) |
| CN (1) | CN101980786B (en) |
| AT (1) | ATE556777T1 (en) |
| FI (1) | FI120672B (en) |
| WO (1) | WO2009118456A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20106184A0 (en) | 2010-11-11 | 2010-11-11 | Thermo Fisher Scientific Oy | Kahvapipetti |
| FI20106185A0 (en) | 2010-11-11 | 2010-11-11 | Thermo Fisher Scientific Oy | Pipette with support |
| FI123652B (en) | 2011-10-20 | 2013-08-30 | Thermo Fisher Scientific Oy | Lockable pipette |
| FR3037825B1 (en) * | 2015-06-24 | 2017-07-28 | Gilson Sas | IMPROVED CONTROL BUTTON FOR A TEST PIPETTE |
| DE102016121813A1 (en) | 2016-11-14 | 2018-05-17 | Ika-Werke Gmbh & Co. Kg | Pipette and method for adjusting a volume of a pipette to be pipetted |
| DE102016121816A1 (en) * | 2016-11-14 | 2018-05-17 | Ika-Werke Gmbh & Co. Kg | Fluid delivery unit and hand metering device with at least one fluid delivery unit |
| CN111862809B (en) * | 2020-06-30 | 2022-07-12 | 上海中航光电子有限公司 | Display device and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554134A (en) * | 1982-06-29 | 1985-11-19 | Labsystems Oy | Pipette with adjustable volume |
| US4672857A (en) * | 1985-09-10 | 1987-06-16 | Labindustries, Inc. | Liquid microdispenser |
| US5413006A (en) * | 1992-09-28 | 1995-05-09 | Gilson Medical Electronics (France) S.A. | Pipette for sampling and dispensing adjustable volumes of liquids |
| US5650124A (en) * | 1995-07-24 | 1997-07-22 | Gilson; Warren E. | Adjustable pipette |
-
2008
- 2008-03-28 FI FI20080247A patent/FI120672B/en not_active IP Right Cessation
-
2009
- 2009-03-26 EP EP09725898A patent/EP2280779B1/en active Active
- 2009-03-26 CN CN2009801114149A patent/CN101980786B/en active Active
- 2009-03-26 AT AT09725898T patent/ATE556777T1/en active
- 2009-03-26 WO PCT/FI2009/050230 patent/WO2009118456A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4554134A (en) * | 1982-06-29 | 1985-11-19 | Labsystems Oy | Pipette with adjustable volume |
| US4672857A (en) * | 1985-09-10 | 1987-06-16 | Labindustries, Inc. | Liquid microdispenser |
| US5413006A (en) * | 1992-09-28 | 1995-05-09 | Gilson Medical Electronics (France) S.A. | Pipette for sampling and dispensing adjustable volumes of liquids |
| US5650124A (en) * | 1995-07-24 | 1997-07-22 | Gilson; Warren E. | Adjustable pipette |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2280779B1 (en) | 2012-05-09 |
| ATE556777T1 (en) | 2012-05-15 |
| FI20080247A (en) | 2009-09-29 |
| EP2280779A1 (en) | 2011-02-09 |
| FI120672B (en) | 2010-01-29 |
| FI20080247A0 (en) | 2008-03-28 |
| WO2009118456A1 (en) | 2009-10-01 |
| CN101980786A (en) | 2011-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |