EP3749454B1 - Systeme d'ejection de cone a ergonomie amelioree pour pipette de prelevement - Google Patents

Systeme d'ejection de cone a ergonomie amelioree pour pipette de prelevement Download PDF

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Publication number
EP3749454B1
EP3749454B1 EP19728494.6A EP19728494A EP3749454B1 EP 3749454 B1 EP3749454 B1 EP 3749454B1 EP 19728494 A EP19728494 A EP 19728494A EP 3749454 B1 EP3749454 B1 EP 3749454B1
Authority
EP
European Patent Office
Prior art keywords
pipette
ejection
cone
control lever
fixed body
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.)
Active
Application number
EP19728494.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3749454A1 (fr
Inventor
Hervé MALVOISIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gilson SAS
Original Assignee
Gilson SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gilson SAS filed Critical Gilson SAS
Priority to PL19728494T priority Critical patent/PL3749454T3/pl
Publication of EP3749454A1 publication Critical patent/EP3749454A1/fr
Application granted granted Critical
Publication of EP3749454B1 publication Critical patent/EP3749454B1/fr
Active legal-status Critical Current
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Classifications

    • 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
    • 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
    • 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

Definitions

  • the invention relates to the field of sampling pipettes, also called laboratory pipettes or also liquid transfer pipettes, intended for sampling and dispensing liquid in containers or the like.
  • the invention relates to any type of pipette, mechanical, electronic or hydride, of the single-channel or multi-channel type.
  • the pipettes more preferably concerned by the present invention are mechanical pipettes with manual actuation. These pipettes are intended to be held in the hand by an operator during liquid sampling and dispensing operations. These operations are carried out by setting in motion a control button obtained by the application of an actuating pressure on this same button, via the operator's thumb.
  • the invention may also relate to hybrid pipettes, or even so-called electronic pipettes within which the movement of the piston is generated by a motor receiving an instruction from the operator, following a pressure exerted on a control button.
  • One of the functions provided by the pipettes is the ejection of the sampling tips. This ejection is usually triggered by the operator who presses, with his thumb, on an ejection button located at the top of the pipette, near the control button.
  • the downward movement of the ejection button brings with it the entire ejection system, which, at its lower end, presses on the periphery of a cone fitted on the pipette tip, in order to cause its ejection. .
  • This ejection requires exceeding the friction forces between the cone and its tip. From this In fact, the operator may have to exert a significant force on the ejection button to unmount the sampling cone.
  • the invention thus provides a simple, efficient and inexpensive response, improving the ergonomics of ejection of the sampling cones.
  • the ejection force to be exerted on the button is advantageously smaller than that required with the solutions of the prior art. Consequently, this specificity of multiplying the ejection force, via the control lever, provides ease of use for the operator.
  • the solution proposed by the invention has the advantage of retaining a linear movement of displacement of the control button, which contributes to the overall improvement of the ergonomics associated with the function of ejection of the cones.
  • This type of linear movement also guarantees the solidity of the pipette, since the risk of breakage or damage to the ejection button is extremely low.
  • the invention also has at least any one of the following optional characteristics, taken individually or in combination.
  • control lever is thus articulated at its first end, and resting on the ejection button as well as on the ejection device. Consequently, during an operation of ejecting a cone, the lever pivots while simple presses are observed at the level of its contacts with the button and the ejection device.
  • Another design could for example consist in providing a pivot connection between the second end of the control lever, and the ejection button.
  • the first end of the lever could then be mounted to slide and pivot, in a rail of the pipette part intended to cooperate with this lever.
  • the intermediate portion could be articulated on the cone ejection device, and the two ends of the lever simply resting on the pipette part and the ejection button.
  • connection between the intermediate actuation portion of the control lever, and the cone ejection device is a point sphere-plane connection.
  • This type of connection makes it possible to limit friction as much as possible during pivoting of the control lever. The wear of the parts concerned is thereby advantageously reduced.
  • this type of connection makes it possible to transmit to the ejection device a force always oriented axially, offering great efficiency.
  • the ejection device has an upper portion biased by the elastic return means and intended to be housed in a fixed body forming a handle of the pipette, as well as a lower portion integral with the upper portion and defining an ejection end. cone.
  • the ejection device is intended to be movable in translation relative to the fixed body of the pipette.
  • the subject of the invention is also a sampling pipette comprising such a cone ejection system.
  • the part on which the first end of the control lever is mounted is secured to the fixed body forming the handle of the pipette, or produced in one piece with this fixed body.
  • the part on which the first end of the control lever is mounted is centered on a longitudinal central axis of the pipette, and traversed by a control rod of the pipette.
  • a pivot axis of the first end of the control lever intercepts a longitudinal central axis of the pipette, preferably substantially orthogonally.
  • the pipette has an end-of-travel stop for the ejection button, said stop being secured to the fixed body forming the handle of the pipette, or made in one piece with this fixed body.
  • This stop is preferably made of an elastomeric material.
  • the ejection button projects upwards from the fixed body forming the handle of the pipette.
  • the ejection button is movable in translation relative to the fixed body forming the handle of the pipette, preferably parallel to a longitudinal central axis of the pipette.
  • the pipette is preferably a mechanical pipette, but it could be an electronic or hybrid pipette with such a manual sampling cone ejection system.
  • a mechanical sampling pipette 1 comprising a cone ejection system 2 according to the invention.
  • the pipette 1 has a manually actuated design, i.e. it is intended to be held by the hand of an operator, who, using his thumb 4, is able to actuate the pipette. pipette to generate the dispensation of a liquid which has previously been aspirated.
  • the pipette 1 comprises in the upper part a fixed body forming a handle 6 of the pipette, from which handle opens a control rod 10. At the upper end of this rod 10, the pipette comprises a control button. pipetting control 12, the upper part of which is intended to undergo the pressure of the thumb 4 of the operator.
  • the pipette 1 comprises a removable lower part 14, which ends downwards with a cone-holder tip 16 receiving a consumable 18, also called a sampling cone.
  • the cone ejection system 2 comprises an ejection device 24, of which a lower portion 20 projecting from the handle 6 defines a cone ejection end 22, surrounding the nozzle 16. This ejection end 22 is located opposite the upper end of the cone 18, so as to be able to cause it to be unhooked by pressing on its periphery.
  • the ejection device 24, of which only the lower portion 20 is visible on the figure 1 , is mounted to move in translation with respect to the handle 6 and to the lower part 14, both forming the fixed part 23 of the pipette. It is a translation in a direction parallel to a longitudinal central axis 8 of the pipette, according to which the control rod 10 is also movable in translation within the pipette.
  • the control rod 10 is moreover centered on this axis 8.
  • the ejection system 2 also includes a cone ejection button 25, also controlled by the thumb 4 of the operator.
  • the ejection button 25 is arranged projecting upwardly at the upper end of the handle 6, being offset laterally and axially from the control button 12.
  • the ejection button 25 is mounted to move in translation with respect to the handle. handle 6, also parallel to the direction of the longitudinal central axis 8 of the pipette.
  • this button when the ejection button 25 is actuated downwards by the thumb of the operator as shown schematically on the figure 2 , this button causes the ejection device 24 to descend, in a manner specific to the invention which will be described below.
  • the setting in motion of the lower portion 20 of the device 24 causes a translation of its ejection end 22 along the end piece 16, with the consequence of pressing the cone 18 which then quickly releases from this end piece.
  • it is noted that in the embodiment described and shown in the figures, it is a single-channel pipette carrying a single consumable 18. However, it could be a multichannel pipette carrying several cones, without departing from the scope of the invention.
  • figure 3 represents the system in an idle state of rest, while the figure 4 represents this same system in a state of ejection of the cone, following an action by the operator on the ejection button 25.
  • the ejection button 25 is movably mounted on a guide rail 42 of a fixed assembly 44, formed integrally with the handle 6, or secured to this handle by being fixedly mounted. on this one.
  • the ejection device 24 also comprises an upper portion 21 which is housed in the handle 6.
  • the lower end of the upper portion has a plate 30 on which resilient return means, in the form of a compression spring 32.
  • the other end of the spring bears on a fixed part 34 of the pipette arranged near the junction between the handle and the lower part 14, so as to return the entire device 24 to the upper position.
  • the lower and upper portions 20, 21 of the device 24 are integral with one another, and connected by a rod 36 visible on the figure 4 , which passes through the fixed part 34.
  • a force multiplier element within the ejection system 2, namely a control lever 40.
  • This lever 40 is interposed between the ejection button 25, and the upper portion 21 of the device 24 which it controls. It firstly comprises a first end 40a mounted articulated on a fixed part 46 of the aforementioned assembly 44.
  • This fixed part 46 is centered on the longitudinal central axis 8, and takes the form of a sleeve traversed by the control rod 10.
  • the pivot axis 48 of the first end 40a orthogonally intercepts the longitudinal central axis 8, and it is located offset downward with respect to the ejection button 25, when the latter occupies its inactive position of rest of the figure 3 .
  • the first end 40a can be formed from a single articulated branch, or else take the form of a yoke, the two ears of which are each articulated along the same axis 48 on the fixed part 46. In the latter case, the two ears yoke would be arranged on either side of the fixed part 46, received between these two ears.
  • the lever 40 has, opposite the first end 40a, a second end 40b on which the lower end of the ejection button 25 bears. It may be a connection of the sphere-plane or cylinder-plane type, in order to limit the sliding and the wear which results therefrom during the pivoting of the lever 40.
  • the lever 40 also comprises an intermediate actuating portion 40c, arranged between the two ends 40a, 40b, preferably while being substantially centered relative to the latter.
  • This intermediate portion 40c is provided to actuate the upper portion 21 of the device 24 in translation, by resting on the upper end of this portion 21.
  • a point sphere-plane connection 50 is provided between this intermediate portion 40c and the upper portion 21, for example by providing a truncated sphere 52 within the portion 40c of the control lever.
  • this type of connection makes it possible to transmit to the upper portion 21 an ejection force always oriented axially, offering high efficiency.
  • the truncated sphere can be made on the upper end of the upper portion 21 of the ejection device 24.
  • the second end 40b When system 2 is in its idle idle state of the figure 3 , the second end 40b is located higher than the first end 40a. As the button 25 is actuated downwards, the second end 40b on which it presses is moved downwards, and causes the rotation of the lever 40 about the pivot axis 48. During this rotation , during which the lever 40 passes through a median position in which it is oriented substantially orthogonally to the longitudinal central axis 8, the intermediate portion 40c presses on the upper portion 21 and drives the entire ejection device 24 downwards . This rotation of the lever 40 continues until the system 2 adopts its state of ejection from the figure 4 , wherein the second end 40b is lower than the first end 40a.
  • This ejection position is not marked by an end stop associated with the lever, but by an end stop of the ejection button 25, so as to limit the risk of damaging this lever 40.
  • the stop here takes the form of one or more seals 60 made of elastomeric material, shown in the figure. figure 5 . These seals 60 are carried by the guide rail 42, at a top end thereof, in order to be contacted by a top end 62 of the button forming the pressure zone for the operator. Thus, at the end of the ejection operation, the operator pressing with his thumb on the pressure zone 62 is stopped in his movement by the stop of this same zone 62 on the seals made of elastomeric material 60.
  • the stroke of the ejection button 25 between its two extreme positions is for example of the order of 10 to 20 mm, while the incident stroke of the ejection device 24 is of the order of half that of the button 25 .

Landscapes

  • 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)
EP19728494.6A 2018-05-07 2019-05-03 Systeme d'ejection de cone a ergonomie amelioree pour pipette de prelevement Active EP3749454B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL19728494T PL3749454T3 (pl) 2018-05-07 2019-05-03 System do wyrzucania stożka o ulepszonej ergonomii dla pipety do pobierania próbek

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1853943A FR3080783B1 (fr) 2018-05-07 2018-05-07 Systeme d’ejection de cone a ergonomie amelioree pour pipette de prelevement
PCT/FR2019/051023 WO2019215405A1 (fr) 2018-05-07 2019-05-03 Systeme d'ejection de cone a ergonomie amelioree pour pipette de prelevement

Publications (2)

Publication Number Publication Date
EP3749454A1 EP3749454A1 (fr) 2020-12-16
EP3749454B1 true EP3749454B1 (fr) 2021-11-10

Family

ID=63080087

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19728494.6A Active EP3749454B1 (fr) 2018-05-07 2019-05-03 Systeme d'ejection de cone a ergonomie amelioree pour pipette de prelevement

Country Status (10)

Country Link
US (1) US11845076B2 (enExample)
EP (1) EP3749454B1 (enExample)
JP (1) JP7261819B2 (enExample)
KR (1) KR20210006351A (enExample)
CN (1) CN111356531B (enExample)
CA (1) CA3098923A1 (enExample)
ES (1) ES2905730T3 (enExample)
FR (1) FR3080783B1 (enExample)
PL (1) PL3749454T3 (enExample)
WO (1) WO2019215405A1 (enExample)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3128889B1 (fr) * 2021-11-09 2023-09-29 Gilson Sas Dispositif de prelevement a deplacement positif, conçu ameliorer la prehension du piston d’un systeme piston-capillaire
CN115283035B (zh) * 2022-08-29 2024-04-30 香港中文大学深港创新研究院(福田) 一种手持自动备液枪的取样滴液方法
CN116196993B (zh) * 2023-03-29 2025-09-23 倍仪昇智能科技(苏州)有限公司 移液枪装卡机构

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI921765A0 (fi) * 1992-04-21 1992-04-21 Labsystems Oy Med en spetsavlaegsnare foersedd pipett.
FR2807340B1 (fr) 2000-04-07 2002-12-06 Gilson Sa Pipette de prelevement d'echantillons liquides a mecanisme d'ejecteur de cone
FI5089U1 (fi) * 2001-07-06 2001-09-28 Biohit Oyj Imulaite
PL200761B1 (pl) * 2003-07-24 2009-02-27 Pz Htl Spo & Lstrok Ka Akcyjna Zespół wyrzutnika wymiennej końcówki w pipecie
US20090071267A1 (en) * 2007-09-17 2009-03-19 Greg Mathus Pipette tip ejection mechanism
PL220934B1 (pl) * 2009-08-28 2016-01-29 PZ HTL Spółka Akcyjna Pipeta mechaniczna z nastawianą wartością objętości pobieranej cieczy
FR2980123B1 (fr) * 2011-09-19 2013-10-11 Gilson Sas Pipette a deplacement positif presentant une fonction d'ejection amelioree
WO2016030978A1 (ja) * 2014-08-27 2016-03-03 株式会社 エー・アンド・デイ ピペット用スタンド
FR3040896B1 (fr) * 2015-09-15 2017-10-13 Gilson Sas Pipette de prelevement comprenant un organe de commande a double fonction d'ejection de cone et de deverrouillage du systeme de reglage de volume
CN205361387U (zh) 2016-01-26 2016-07-06 深圳市爱纳多电子商务有限公司 一种吸液手柄

Also Published As

Publication number Publication date
US20210106986A1 (en) 2021-04-15
FR3080783B1 (fr) 2020-05-22
FR3080783A1 (fr) 2019-11-08
KR20210006351A (ko) 2021-01-18
EP3749454A1 (fr) 2020-12-16
JP2021522993A (ja) 2021-09-02
ES2905730T3 (es) 2022-04-11
US11845076B2 (en) 2023-12-19
CN111356531B (zh) 2022-06-03
JP7261819B2 (ja) 2023-04-20
PL3749454T3 (pl) 2022-02-28
CN111356531A (zh) 2020-06-30
WO2019215405A1 (fr) 2019-11-14
CA3098923A1 (en) 2019-11-14

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