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EP3538271B1 - Dispositif doseur manuel - Google Patents

Dispositif doseur manuel Download PDF

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Publication number
EP3538271B1
EP3538271B1 EP17777481.7A EP17777481A EP3538271B1 EP 3538271 B1 EP3538271 B1 EP 3538271B1 EP 17777481 A EP17777481 A EP 17777481A EP 3538271 B1 EP3538271 B1 EP 3538271B1
Authority
EP
European Patent Office
Prior art keywords
detent
main body
discharge unit
fluid discharge
counterdetent
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
EP17777481.7A
Other languages
German (de)
English (en)
Other versions
EP3538271A1 (fr
Inventor
Philip DÖBELE
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.)
IKA Werke GmbH and Co KG
Original Assignee
IKA Werke GmbH and Co KG
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 IKA Werke GmbH and Co KG filed Critical IKA Werke GmbH and Co KG
Publication of EP3538271A1 publication Critical patent/EP3538271A1/fr
Application granted granted Critical
Publication of EP3538271B1 publication Critical patent/EP3538271B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B01L3/021—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
    • 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
    • B01L3/0286—Ergonomic aspects, e.g. form or arrangement of controls
    • 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
    • B01L2200/02—Adapting objects or devices to another
    • B01L2200/025—Align devices or objects to ensure defined positions relative to each other
    • 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
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/14—Process control and prevention of errors

Definitions

  • the invention relates to a hand-held metering device, in particular a pipette, with a base body and with a fluid dispensing unit, the base body displacing means for displacing a fluid, for example for receiving or dispensing a fluid, in particular a liquid, into or from a pipette tip, and actuating means for Comprises actuation of the displacement means, and wherein the base body and the fluid delivery unit are detachably connected to one another by means of a screw connection.
  • Such hand metering devices are previously known from the prior art in different embodiments, for example from the publication U.S. 4,905,526 A and DE 10 2007 006 076 A1 . They are used as so-called dispensers or as so-called pipettes.
  • the base body and the fluid delivery unit can be detachably connected to one another by means of a screw connection.
  • the screw connection is tightened sufficiently, but not too tightly. If the screw connection is too loose, the accuracy of the hand-held metering device can be impaired. If the screw connection is tightened too much, the interconnected parts of the manual dosing device can be damaged.
  • the object of the invention is therefore to provide a hand-held metering device of the type mentioned at the outset, in which the base body and the fluid dispensing unit can be reliably connected to one another with less effort.
  • a hand-held metering device which, by engaging the latching connection between the base body and the fluid dispensing unit, gives the user acoustic and haptic feedback that the screw connection between the fluid dispensing unit and the base body has reached its correct end position, i.e. the screw connection is sufficiently tight tightened but not over tightened.
  • a user of the hand-held metering device can screw the base body to the fluid dispensing unit without having to pay particular attention not to tighten the screw connection too loosely or too tightly.
  • the hand-held metering device provides a connection between the base body and the fluid dispensing unit, which allows the advantageous fixed connection between the two parts of the hand-held metering device associated with a screw connection, but in which no particular attention has to be paid to the connection between properly manufacture the parts.
  • the user of the hand-held metering device receives feedback from the hand-held metering device about the successful screwing process in the form of the noticeable and audible locking of the locking connection receives. In this way it is possible to tighten the screw connection repeatedly.
  • the screw connection comprises a thread and a mating thread.
  • the thread can be formed on the base body and the mating thread on the fluid delivery unit.
  • the latching connection comprises at least one latching element arranged on the base body and at least one counter-latching element arranged on the fluid delivery unit. It can then be provided that the at least one locking element and the at least one counter-locking element can be locked to one another by screwing the thread to the counter-thread.
  • the invention provides that the latching element and the counter-latching element are designed and arranged so that they can be latched to one another, that is to say they come into engagement with one another, in that the thread and the mating thread are screwed together up to an end position of the screw connection in which the base body and the fluid delivery unit are connected to one another as intended.
  • the at least one latching element is a latching receptacle and the at least one counter-latching element is a latching projection.
  • the at least one latching element is a latching projection and the at least one counter-latching element is a latching receptacle.
  • At least two or more, preferably evenly, locking elements are provided on the base body, distributed around a longitudinal center axis of the base body, and at least two or three, preferably evenly, counter-locking elements are provided on the fluid dispensing unit, distributed around a longitudinal center axis of the fluid dispensing unit. It is thus possible to sufficiently define the contact of the fluid dispensing unit in its fastening position on the base body by means of the at least two latching elements and the at least two counter-latching elements. There can be as many counter-locking elements as there are locking elements.
  • a number of latching elements is preferably provided on the base body which corresponds to an integral multiple or multiple, in particular twice or three times or four times, the number of counter-latching elements on the fluid dispensing unit.
  • the base body corresponds to an integral multiple or multiple, in particular twice or three times or four times, the number of counter-latching elements on the fluid dispensing unit.
  • six latching elements can be formed on the base body and three counter-latching elements can be formed on the fluid delivery unit. This can promote the screwing of the fluid delivery unit to the base body and the locking of the latching connection.
  • the at least one locking element is arranged, preferably axially, adjacent to the thread and the at least one counter-locking element, preferably axially, to be arranged adjacent to the counter-thread.
  • the base body has a threaded connector on which the thread, in particular as an internal thread, is formed.
  • the fluid delivery unit have a mating thread on which the mating thread, in particular as an external thread, is formed.
  • the at least one latching element can then also be formed on the threaded connector of the base body and the at least one counter-locking element can also be formed on the mating threaded connector in addition to the mating thread.
  • the threaded connector and / or the counter-threaded connector can consist of an elastically deformable material, for example plastic.
  • the at least one locking element and also the at least one counter-locking element are then each formed on a radially inwardly elastically deformable hollow structure, namely the threaded connector or the counter-threaded connector, it is possible that they can evade in the radial direction to establish the locking connection. It can therefore be preferred if the threaded connector is designed in such a way that it can be elastically deformed in the radial direction. In the case of the counter-threaded connector, too, it can be advantageous in this context if it is designed in such a way that it can be elastically deformed in the radial direction. This can promote the permanent function of the latching connection between the base body and the fluid delivery unit.
  • the at least one latching element and the at least one counter-latching element extend in the radial and axial directions on the base body or on the fluid delivery unit.
  • the axial extent of the latching projections can be used for the latching projections to serve as a defined axial stop.
  • Such an axial stop which is then replaced by a corresponding Matched design of the locking elements and the counter-locking elements can be generated, so that the fluid delivery unit can always be arranged in the same axial position relative to the base body. If the at least one latching element and the at least one counter-latching element did not provide such an axial stop, it would possibly be possible to rotate the fluid delivery unit even further after the latching connection has latched.
  • the at least one latching element and the at least one counter-latching element each have mutually complementary bevels or inclined surfaces, by means of which the latching connection can be opened when the screw connection is loosened, repeated separation and connection of the base body with the fluid delivery unit is possible without damaging the latching connection.
  • the base body can have at least one axial stop and the fluid delivery unit can have at least one matching axial counter-stop.
  • the at least one locking element can form the at least one axial stop and the at least one counter-locking element can form the at least one axial counter-stop.
  • the latching element and the counter-latching element can thus assume a double function.
  • the fluid delivery unit can be a piston unit with a cylinder and with a piston which can be displaced into the cylinder and connected to the displacement means.
  • the base body may include a housing.
  • the components of the base body can protect against external influences, for example against contamination or Damage, be protected.
  • the thread and / or the at least one latching element is / are arranged on the housing of the base body.
  • the fluid delivery unit prefferably has a means for releasably holding a pipette tip.
  • This means can be a shaft, on the free end of which a pipette tip can be slipped or slipped.
  • the hand-held metering device can have an ejection device, in particular manually confirmable, for ejecting a pipette tip, for example the one already mentioned above.
  • the Figures 1 to 6 show different views of a hand-held metering device designated as a whole by 1.
  • the manual dosing device shown in the figures is designed as a mechanical and manually operable pipette 2.
  • the hand-held metering device 1 has a base body 3 and a fluid dispensing unit 4.
  • the base body 3 comprises displacement means 5 for displacing a fluid in the fluid dispensing unit 4 and an actuating means 5a in the form of a pusher for operating the displacement means 5.
  • the base body 3 and the fluid dispensing unit 4 are detachably connected to one another by means of a screw connection 6.
  • the displacement means 5 is a piston rod 8 connected to a piston 7 of the fluid delivery unit 4, which is shown in FIG Figure 2 can be seen in the beginning.
  • Piston 7 and piston rod 8 are connected to one another via a connecting piece 9.
  • a latching connection 10 is provided between the base body 3 and the fluid dispensing unit 4, which can be locked by screwing the fluid dispensing unit 4 to the base body 3.
  • the screw connection 6 comprises a thread 11 on the base body 3 and a mating thread 12 on the fluid delivery unit 4.
  • the latching connection 10 comprises a plurality of latching elements 13 arranged on the base body 3 and a plurality of matching locking elements 14 arranged on the fluid dispensing unit 4.
  • the latching elements 13 and the counter latching elements 14 are arranged on the base body 3 or on the fluid dispensing unit 4 in such a way that they can be screwed together of the thread 11 can be locked together with the mating thread 12.
  • the latching elements 13 and the counter-latching elements 14 are evenly distributed around a longitudinal center axis L of the base body 3 and the fluid dispensing unit 4 on the base body 3 and on the fluid dispensing unit 4, respectively.
  • a total of six latching elements 13 are formed on the base body 3 and three counter-latching elements 14 on the fluid delivery unit 4. Thus there are twice as many latching elements 13 as counter-latching elements 14.
  • the locking elements 13 and the mating locking elements 14 are locked together by the thread 11 and the mating thread 12 in a defined screw position, which here represents an end position of the screw connection 6, in which the base body 3 and the fluid delivery unit 4 are connected to each other as intended be screwed.
  • the user of the hand-held metering device 1 receives acoustic and haptic feedback by locking the latching connection 10 as soon as the fluid delivery unit 4 is connected to the base body 3 as intended.
  • the latching elements 13 arranged on the base body 3 are designed as trough-shaped latching receptacles 15.
  • the counter-locking elements 14 arranged on the fluid delivery unit 4 are knob-shaped locking projections 16.
  • the locking elements 13 are arranged in the axial direction adjacent to the thread 11 and above it on the base body 3.
  • the mating locking elements 14 are arranged axially adjacent to the mating thread 12 and above it on the fluid delivery unit 4.
  • the base body 3 has a threaded connector 17 on which the thread 11 and the latching elements 13 are formed.
  • the fluid dispensing unit 4 for its part, has a matching mating thread connector 18 on which the mating thread 12 and the mating locking elements 14 are formed.
  • the thread 11 is designed as an internal thread
  • the mating thread 12 is designed as an external thread.
  • Both the threaded connector 17 and the counter-threaded connector 18 are elastically deformable in the radial direction in order to enable the locking connection 10 to engage and disengage.
  • Both the locking elements 13 and the counter-locking elements 14 extend both in the radial and in the axial direction on the inner circumference of the threaded connector 17 or on the outer circumference of the counter-threaded connector 18.
  • the latching elements 13 and the counter-latching elements 14 each have mutually complementary bevels or inclined surfaces 19, by means of which the latching connection 10 can be reversibly opened when the screw connection 6 is loosened. As soon as a corresponding torque is applied to the screw connection 6 is applied, the latching projections 16 can slide out of the associated latching receptacles 15 and the latching connection 10 can be released. This is done by a tangential movement occurring when loosening the screw connection 6 between the locking elements 13 and the counter-locking elements 14 with the aid of the complementary bevels or inclined surfaces 19 in a radially acting relative displacement of the counter-locking elements 14 to the locking elements 13, so that the counter-locking elements 14 and the locking elements 13 can be detached from each other.
  • the base body 3 has, within the threaded connector 17, a plurality of stops 20, which are evenly distributed around a longitudinal center axis L of the base body 3, in order to limit the screwing depth of the screw connection 6.
  • the latching elements 13 are arranged on an end face 23, which faces the fluid delivery unit 4 in the position of use, of the stops 20 extending radially into the interior of the threaded connector 17.
  • the fluid dispensing unit 4 is a piston unit which comprises a cylinder 24 in which the piston 7 can be axially displaced with the aid of the displacement means 5 in the form of the piston rod 8 in order to take up a defined volume of liquid using the hand-held metering device 1 or to dispense it using the hand-held metering device 1.
  • Figure 1 shows that the base body 3 is surrounded by a housing 29 of the hand-held metering device 1.
  • the fluid dispensing unit has a shaft 25, onto the free end 26 of which a pipette tip can be plugged.
  • This shaft 25 serves with its free end 26 as a means for releasably holding a pipette tip.
  • the hand-held metering device 1 has a manually operated ejection device 27.
  • This ejection device 27 comprises an ejector sleeve 28 which is axially displaceable relative to the shaft 25 of the fluid delivery unit 4 and which can be manually displaced axially relative to the shaft 25 by means of a corresponding ejection mechanism.
  • the manual metering device 1 comprises the base body 3 that can be screwed to the fluid dispensing unit 4, with the locking connection 10 being provided in addition to the screw connection 6 for the detachable connection of the base body 3 to the fluid dispensing unit 4, which is locked by connecting the base body 3 to the fluid dispensing unit 4.

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  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)

Claims (13)

  1. Dispositif doseur manuel (1), en particulier pipette (2), comprenant un corps de base (3) et une unité de distribution de fluide (4), dans lequel le corps de base (3) comprend des moyens de déplacement (5) pour le déplacement d'un fluide et des moyens d'actionnement (5a) pour l'actionnement des moyens de déplacement (5), et dans lequel le corps de base (3) et l'unité de distribution de fluide (4) sont reliés l'un à l'autre de manière détachable par l'intermédiaire d'un vissage (6), dans lequel une liaison par encliquetage (10) est prévue entre le corps de base (3) et l'unité de distribution de fluide (4) et peut être encliquetée avec le corps de base (3) par le vissage de l'unité de distribution de fluide (4), dans lequel ledit au moins un élément d'encliquetage (13) et ledit au moins un élément d'encliquetage homologue (14) sont disposés de telle sorte qu'ils puissent être encliquetés l'un avec l'autre, du fait que le filet (11) et le filet homologue (12) sont vissés l'un à l'autre jusque dans une position de vissage définie, à savoir jusque dans une position finale du vissage dans laquelle le corps de base (3) et l'unité de distribution de fluide (4) sont reliés l'un à l'autre conformément à l'usage prévu,
    caractérisé en ce qu'un retour acoustique et un retour haptique peuvent être produits par l'établissement de la liaison par encliquetage (10), indiquant que le vissage (6) entre l'unité de distribution de fluide (4) et le corps de base (3) a atteint sa position finale conforme à l'usage prévu.
  2. Dispositif doseur manuel (1) selon la revendication 1, caractérisé en ce que le vissage (6) comprend un filet et un filet homologue (12), dans lequel le filet (11) est réalisé sur le corps de base (3) et le filet homologue (12) est réalisé sur l'unité de distribution de fluide (4), en ce que la liaison par encliquetage (10) comprend au moins un élément d'encliquetage (13) qui est disposé sur le corps de base (3) et au moins un élément d'encliquetage homologue (14) qui est disposé sur l'unité de distribution de fluide (4), dans lequel ledit au moins un élément d'encliquetage (13) et ledit au moins un élément d'encliquetage homologue (14) peuvent être encliquetés l'un avec l'autre par le vissage du filet (11) avec le filet homologue (12).
  3. Dispositif doseur manuel (1) selon la revendication 1 ou 2, dans lequel ledit au moins un élément d'encliquetage (13) est un logement d'encliquetage (15) et ledit au moins un élément d'encliquetage homologue (14) est une partie d'encliquetage saillante (16) ou dans lequel ledit au moins un élément d'encliquetage est une partie d'encliquetage saillante (16) et ledit au moins un élément d'encliquetage homologue est un logement d'encliquetage.
  4. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel au moins deux ou plus de deux éléments d'encliquetage (13), qui sont disposés de manière répartie, de préférence uniformément, autour d'un axe longitudinal médian (L) du corps de base (3), sont prévus sur le corps de base (3), et au moins deux ou trois ou un certain nombre d'éléments d'encliquetage homologues (14), qui sont disposés de manière répartie, de préférence uniformément, autour d'un axe longitudinal médian (L) de l'unité de distribution de fluide (4) qui correspond au nombre d'éléments d'encliquetage (13), sont prévus sur l'unité de distribution de fluide (4), ou dans lequel un certain nombre d'éléments d'encliquetage (13) sont prévus sur le corps de base (3), nombre qui correspond à un multiple entier, en particulier au double, au triple ou au quadruple du nombre d'éléments d'encliquetage homologues (14) sur l'unité de distribution de fluide (4).
  5. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel ledit au moins un élément d'encliquetage (13) est disposé, de préférence axialement, dans le voisinage du filet (11) et ledit au moins un élément d'encliquetage homologue (14) est disposé, de préférence axialement, dans le voisinage du filet homologue (12).
  6. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le corps de base (3) présente une tubulure filetée (17) qui est de préférence élastiquement déformable dans la direction radiale et sur laquelle le filet (11), en particulier en tant que filet intérieur, et ledit au moins un élément d'encliquetage (13) sont réalisés, et dans lequel l'unité de distribution de fluide (4) présente une tubulure filetée homologue (18), qui est de préférence élastiquement déformable dans la direction radiale, sur laquelle le filet homologue (12), en particulier en tant que filet extérieur, et ledit au moins un élément d'encliquetage homologue (14) sont réalisés.
  7. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel ledit au moins un élément d'encliquetage (13) et ledit au moins un élément d'encliquetage homologue (14) s'étendent dans la direction radiale et dans la direction axiale.
  8. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel ledit au moins un élément d'encliquetage (13) et ledit au moins un élément d'encliquetage homologue (14) présentent respectivement des chanfreins (19) complémentaires les uns des autres et au moyen desquels la liaison par encliquetage peut être ouverte lors de la libération du vissage.
  9. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le corps de base (3) présente au moins une butée axiale (20) et l'unité de distribution de fluide (4) présente au moins une butée axiale homologue (21) qui est adaptée à celle-ci dans le but de délimiter la profondeur de vissage du vissage (6), en particulier dans lequel ledit au moins un élément d'encliquetage (13) forme ladite au moins une butée axiale (20) et ledit au moins un élément d'encliquetage homologue (14) forme ladite au moins une butée axiale homologue (21).
  10. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel l'unité de distribution de fluide (4) comprend une unité de piston qui est composée d'un cylindre (24) et d'un piston (7) pouvant coulisser dans le cylindre (24) et qui peut être reliée au moyen de déplacement (5).
  11. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le corps de base (3) comprend un boîtier (29).
  12. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel l'unité de distribution de fluide (4) comprend un moyen (25, 26) pour le maintien libérable d'une pointe de pipette, en particulier une tige (25), à l'extrémité libre (26) de laquelle une pointe de pipette peut être emboîtée ou est emboîtée.
  13. Dispositif doseur manuel (1) selon l'une quelconque des revendications précédentes, dans lequel le dispositif doseur manuel (1) est pourvu d'un système d'éjection (27), en particulier qui peut être actionné manuellement, dans le but d'éjecter une ou la pointe de pipette.
EP17777481.7A 2016-11-14 2017-09-22 Dispositif doseur manuel Active EP3538271B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016121815.4A DE102016121815A1 (de) 2016-11-14 2016-11-14 Handdosiervorrichtung
PCT/EP2017/001128 WO2018086719A1 (fr) 2016-11-14 2017-09-22 Dispositif doseur manuel

Publications (2)

Publication Number Publication Date
EP3538271A1 EP3538271A1 (fr) 2019-09-18
EP3538271B1 true EP3538271B1 (fr) 2021-05-26

Family

ID=59997300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17777481.7A Active EP3538271B1 (fr) 2016-11-14 2017-09-22 Dispositif doseur manuel

Country Status (5)

Country Link
US (1) US11148132B2 (fr)
EP (1) EP3538271B1 (fr)
CN (1) CN110099748B (fr)
DE (1) DE102016121815A1 (fr)
WO (1) WO2018086719A1 (fr)

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DE102016121815A1 (de) 2018-05-17
CN110099748B (zh) 2021-10-15
US11148132B2 (en) 2021-10-19
EP3538271A1 (fr) 2019-09-18
CN110099748A (zh) 2019-08-06
WO2018086719A1 (fr) 2018-05-17
US20190321816A1 (en) 2019-10-24

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