EP2827989B1 - Device having a display for repeatedly dosing - Google Patents
Device having a display for repeatedly dosing Download PDFInfo
- Publication number
- EP2827989B1 EP2827989B1 EP13709794.5A EP13709794A EP2827989B1 EP 2827989 B1 EP2827989 B1 EP 2827989B1 EP 13709794 A EP13709794 A EP 13709794A EP 2827989 B1 EP2827989 B1 EP 2827989B1
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- EP
- European Patent Office
- Prior art keywords
- stop
- setting
- actuating element
- dispensing
- fact
- 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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- 230000000881 depressing effect Effects 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000000994 depressogenic effect Effects 0.000 claims 1
- 239000012530 fluid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
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
- 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
- B01L3/0234—Repeating pipettes, i.e. for dispensing multiple doses from a single charge
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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
- B01L2200/02—Adapting objects or devices to another
- B01L2200/023—Adapting objects or devices to another adapted for different sizes of tubes, tips or container
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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
- B01L2300/00—Additional constructional details
- B01L2300/02—Identification, exchange or storage of information
- B01L2300/025—Displaying results or values with integrated means
- B01L2300/026—Drum counters
Definitions
- the invention relates to a device (pipette) for the metered dispensing of a medium from a container comprising a piston by depressing the piston, comprising: a housing; a dispensing mechanism with a dispensing element; an actuator movable from a first stop to a second stop, the actuator coupled to the dispensing mechanism such that upon movement of the actuator from the first stop to the second stop, the dispensing member depresses the piston a distance; and an adjusting mechanism for adjusting the distance of the dispensing element traveled from the first stop to the second stop per movement of the actuating element, wherein the adjusting mechanism is step-adjustable by rotation of an adjusting element and has at least one cylindrical wall portion.
- a syringe Prior to dosing, a syringe is inserted into the device and a certain volume of fluid is drawn into the syringe. Subsequently, the actuating element is actuated so often until a series dosage is completed or until the syringe is emptied.
- auxiliary tables are used, in which for various known syringe types and metering volumes per actuation cycle, the appropriate adjustment of the adjustment mechanism is specified. Even if in this way there is a clear specification as to which stage of the adjustment mechanism is to be selected for a particular type of syringe and dosing volume, there is a considerable risk of incorrect settings. For example. It may also occur to trained personnel that the table erroneously not the correct value, but, for example, a value from an adjacent column of the line is read. In this way, it may turn out that an entire series dosing is faulty.
- the object of the invention is to provide a device for the metered dispensing of a fluid from a syringe, in which the susceptibility to errors in the adjustment of the dose amount to be applied is reduced.
- the apparatus for metering a medium from a container comprising a piston by depressing the piston comprises: a housing; a dispensing mechanism with a dispensing element; an actuator movable from a first stop to a second stop, the actuator coupled to the dispensing mechanism such that upon movement of the actuator from the first stop to the second stop, the dispensing member depresses the piston a distance; and an adjusting mechanism for adjusting the distance of the dispensing element traveled from the first stop to the second stop per movement of the actuating element, wherein the adjusting mechanism is step-adjustable by rotation of an adjusting element and has at least one cylindrical wall portion.
- the device further comprises a display element comprising: a gap-like opening in the housing through which a slit-like portion of the cylindrical wall portion is visible from outside the housing; and a tabulation of the quantities that are respectively applied during a movement of the actuating element from the first stop to the second stop for a predetermined number of different types of syringes at different step-like settings of the adjusting mechanism, wherein the tabular list is arranged on the cylindrical wall portion.
- the device is a so-called hand dispenser or a pipette for dispensing series dosages, for example in the volume range between 1 .mu.l and 5 ml.
- an actuating element for example a pushbutton
- the piston of the syringe is adjusted to the desired dispensing volume per actuation or actuation cycle pressed down corresponding route. This process is repeated until the syringe is empty or until the series dose is complete.
- the actuator is coupled to the dispensing mechanism having a dispensing member that directly engages the syringe plunger such that upon a complete depression of the actuator from a first stop to a second stop, the dispensing member is moved precisely the correct, preset piston stroke.
- the device has an adjustment mechanism.
- the adjustment mechanism has an adjusting element by means of which a cylindrical wall section, in particular a sleeve or setting drum, is adjustable relative to the housing between different radial settings, in particular stepwise. This setting determines the ratio between the actuating travel of the actuator and the travel distance of the dispensing element.
- the dispensing mechanism may also comprise a pawl, which, after the actuating element has been moved over a certain distance, engages in a corresponding counter-toothing of the dispensing element.
- the actuating element is arranged movable relative to the adjusting drum in the axial direction, the adjusting drum is arranged immovable axially relative to the housing.
- the pawl coupled to the actuating element is blocked over a distance before engagement in the counter-toothing of the dispensing element, as long as the pawl is pushed along the inner wall of the sleeve.
- the pawl engages in a counter-toothing under the action of a force (for example generated by an elastic element).
- a force for example generated by an elastic element.
- the housing has an axial, gap-like recess or opening or window with respect to the adjusting drum. Through this opening, arranged in the region of the opening column of the table can be seen from the outside. At different angular positions of the adjusting drum different columns of the table are visible, so that the dosage for each type of syringe can be read in a simple manner and with reduced error rate.
- the tabulated list contains, column by column, the indication of the application rate per actuation of the actuating element for the various types of syringes at the respective setting of the setting mechanism, line by line the application rate for a particular type of syringe at the various step-like settings of the setting mechanism.
- the gap-like opening is particularly arranged relative to the cylindrical wall portion such that for a particular setting stage of the adjustment mechanism the appropriate application rate per actuation of the actuating element for each of the syringe types is visible.
- the adjustment mechanism preferably comprises a pawl and a counter-toothing, for. B. a rack, wherein the pawl engages at different settings of the adjustment mechanism after different movement distances of the actuating element between the stops in the counter-toothing.
- the adjustment mechanism may comprise a blocking element which blocks the engagement of the pawl in the counter teeth until the actuating element is pressed down by a certain distance of movement, the distance of movement depending on the setting of the adjusting mechanism.
- the housing in particular has a receptacle for attaching a syringe to the housing.
- the device may also include a latch for securing the piston to the dispensing element.
- the device may comprise an elevator element with an actuating slide for mounting the syringe.
- the piston can be pulled out of the syringe body and the syringe are drawn up before the series dosing begins.
- the elevator element and the lock are in particular coupled.
- the device has a return mechanism that exerts a (restoring) force on the actuating element in the direction of the first stop.
- the metering device 1 has a housing 10.
- a gap-like opening 11 is formed in the axial direction.
- an adjusting drum which is located in the interior of the housing 10.
- the various types of syringes which are identified on the basis of their volumes are indicated line by line in a field 12 corresponding to the height of the opening 11.
- the setting step is given a step-like adjustment mechanism.
- the respective dosing quantities for the different types of syringes are displayed at a certain setting level.
- the metering device 1 also has an actuating knob 20, which from a first stop position (above, as in the FIG. 1 shown), in which it is urged by a return spring can be pressed by pressing in a second stop position down.
- This simple operation corresponds to a single dosing in the context of a series dosing.
- the metering device 1 has an adjusting wheel 30 with which the volume to be dispensed in a single metering can be adjusted.
- a slider 40 which can be moved from a lower position 41 in the illustrated upper position 40, the syringe which has been introduced into a receptacle 14 of the housing 10, can be wound up.
- the button 42 is provided for actuating a lock with which the plunger or piston of the syringe can be attached to a corresponding Ausbringelement.
- the dispensing mechanism has a dispensing element 4 with the following elements, which are rigidly connected to each other:
- the already mentioned slide 40 serves to the dispensing element 4 from a first position (corresponding to reference numeral 41 in FIG. 1 ) to a second position (corresponding to reference numeral 40 of FIG FIG. 1 ), in which the syringe is raised.
- the plunger or piston of the syringe (not shown) can be locked and unlocked by means of a lock 43 attached to the Ausbringelement 4.
- the lock 43 is actuated by the lock button 42.
- the Ausbringelement 4 also has a rack 44, in which a corresponding pawl of the dispensing mechanism can engage, as in connection with the FIG. 3 will be described.
- a central element of the invention is a relative to the housing axially fixed adjusting drum 31. This is about a thumbwheel 30 radially rotatable or adjustable.
- On the adjusting drum 31 are column by column quantities of the application volumes for different types of syringes at different settings (the setting stage is given in the last line) in the form of a table arranged.
- the drum 31 is oriented relative to the window 11 in the housing 10 so that at a certain angular adjustment of the drum 31 for each type of syringe, the correct application volume in the window 11 is visible. Line by line, the Ausbringvolumina for a particular type of syringe, depending on the angular adjustment of the drum 31, indicated.
- the lower edge of the adjusting drum has steps 311, 312, 313, etc., different axial height.
- the rack 44 faces a certain step of the lower edge of the adjusting drum 31.
- a pawl initially on the inner wall of the adjusting drum 31, also moves downwards.
- this pawl now engages sooner or later with the rack 44 and pushes the Ausbringelement 4 in the remaining distance that the actuating element 20 to the second stop performs, down.
- a coupled to the Ausbringelement 4 piston rod is pushed by this distance down until the desired volume is applied.
- the actuating element 20 moves, in particular from the FIG. 3 shows, under the force of a return spring 21 back up to the starting position to the first stop.
- the pawl 22 is not in engagement with the rack 44 but, due to its geometry, slides over the teeth of the rack 44.
- the pawl 22 then slides back into the adjusting drum 31.
- the pawl 22 first moves along the inside of the adjusting drum 31 to the set lower edge of the adjusting drum 31 and then engages, since a force K in the direction the rack 44 acts (for example, a spring force K) in the rack 44 and pushes this turn a defined way down.
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- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
Die Erfindung betrifft eine Vorrichtung (Pipette) zum dosierten Ausbringen eines Mediums aus einem Behälter, der einen Kolben umfasst, durch Herabdrücken des Kolbens, umfassend: ein Gehäuse; einen Ausbringmechanismus mit einem Ausbringelement; ein Betätigungselement, das von einem ersten Anschlag zu einem zweiten Anschlag bewegbar ist, wobei das Betätigungselement mit dem Ausbringmechanismus gekoppelt ist, sodass bei der Bewegung des Betätigungselements vom ersten Anschlag zum zweiten Anschlag das Ausbringelement den Kolben um eine Strecke herabdrückt; und einen Einstellmechanismus zum Einstellen der pro Bewegung des Betätigungselements vom ersten Anschlag zum zweiten Anschlag zurückgelegten Strecke des Ausbringelements, wobei der Einstellmechanismus durch Drehung eines Einstellelements stufenartig einstellbar ist und wenigstens einen zylindrischen Wandabschnitt aufweist.The invention relates to a device (pipette) for the metered dispensing of a medium from a container comprising a piston by depressing the piston, comprising: a housing; a dispensing mechanism with a dispensing element; an actuator movable from a first stop to a second stop, the actuator coupled to the dispensing mechanism such that upon movement of the actuator from the first stop to the second stop, the dispensing member depresses the piston a distance; and an adjusting mechanism for adjusting the distance of the dispensing element traveled from the first stop to the second stop per movement of the actuating element, wherein the adjusting mechanism is step-adjustable by rotation of an adjusting element and has at least one cylindrical wall portion.
Insbesondere in Laboranwendungen kommt es vor, dass Seriendosierungen mit vorgegebenem Volumen (bspw. 1 µl - 5 ml) durchgeführt werden müssen. Das händische Ausbringen einer Vielzahl kleinerer Mengen aus einer Spritze ohne Hilfsmittel ist nicht nur schwierig, sondern auch fehleranfällig. Aus diesem Grund wurden Hilfsmittel, z.B. Handdispenser, entwickelt, mit denen eine Seriendosierung unter Voreinstellung des auszubringenden Volumens möglich ist. Das gewünschte Ausbringvolumen pro Betätigungszyklus wird durch einen Verstellmechanismus voreingestellt.In particular in laboratory applications it happens that serial doses with a given volume (eg 1 μl-5 ml) have to be carried out. The manual dispensing of a large number of smaller quantities from a syringe without aids is not only difficult but also error-prone. For this reason, aids, e.g. Hand dispensers, developed, with which a series dosing with presetting of the auszubringenden volume is possible. The desired application volume per actuation cycle is preset by an adjustment mechanism.
Vor der Dosierung wird eine Spritze in die Vorrichtung eingelegt und eine bestimmte Volumenmenge des Fluids in die Spritze aufgezogen. Anschließend wird das Betätigungselement so oft betätigt, bis eine Seriendosierung abgeschlossen bzw. bis die Spritze entleert ist.Prior to dosing, a syringe is inserted into the device and a certain volume of fluid is drawn into the syringe. Subsequently, the actuating element is actuated so often until a series dosage is completed or until the syringe is emptied.
Um die Anzahl von Hilfsgeräten im Labor zu reduzieren, sind die meisten Handdispenser so aufgebaut, dass Spritzen unterschiedlicher Größe und unterschiedlichen Aufbaus zur Dosierung in das Gerät eingesetzt werden können. Wenn damit einerseits die Flexibilität beim Einsatz des Geräts verbessert wird, so ergibt sich andererseits das Problem, dass die Einstellung des gewünschten Dosiervolumens erschwert wird, da bei unterschiedlichen Spritzentypen zur Ausgabe eines bestimmten Dosiervolumens der Kolben um unterschiedliche Wegstrecken nach unten gedrückt werden muss. Die gewünschte Wegstrecke pro Betätigungszyklus bei vorgegebenem Dosiervolumen hängt insbesondere vom Querschnitt des Spritzenkörpers ab.In order to reduce the number of auxiliary devices in the laboratory, most hand dispensers are designed so that syringes of different sizes and different construction can be used for dosing into the device. On the one hand, if this improves the flexibility in the use of the device, on the other hand there is the problem that the setting of the desired metering volume is made more difficult, since with different types of syringe for dispensing a certain metering volume the piston has to be pressed down by different distances. The desired distance per actuation cycle for a given metering volume depends in particular on the cross section of the syringe body.
Um die jeweils passende Einstellung zu finden, werden Hilfstabellen verwendet, in denen für verschiedene bekannte Spritzentypen und Dosiervolumina pro Betätigungszyklus die passende Einstellstufe des Verstellmechanismus angegeben ist. Auch wenn auf diese Weise eine klare Vorgabe besteht, welche Stufe des Verstellmechanismus bei einem bestimmten Spritzentyp und Dosiervolumen zu wählen ist, besteht eine erhebliche Gefahr von Fehleinstellungen. Bspw. kann es auch geschultem Personal passieren, dass aus der Tabelle versehentlich nicht der korrekte Wert, sondern bspw. ein Wert aus einer benachbarten Spalte der Zeile abgelesen wird. Auf diese Weise kann sich herausstellen, dass eine gesamte Seriendosierung fehlerhaft ist.In order to find the appropriate setting, auxiliary tables are used, in which for various known syringe types and metering volumes per actuation cycle, the appropriate adjustment of the adjustment mechanism is specified. Even if in this way there is a clear specification as to which stage of the adjustment mechanism is to be selected for a particular type of syringe and dosing volume, there is a considerable risk of incorrect settings. For example. It may also occur to trained personnel that the table erroneously not the correct value, but, for example, a value from an adjacent column of the line is read. In this way, it may turn out that an entire series dosing is faulty.
Ausgehend davon besteht die Aufgabe der Erfindung darin, eine Vorrichtung zum dosierten Ausbringen eines Fluids aus einer Spritze bereitzustellen, bei der die Fehleranfälligkeit bei der Einstellung der auszubringenden Dosiermenge reduziert ist.Proceeding from this, the object of the invention is to provide a device for the metered dispensing of a fluid from a syringe, in which the susceptibility to errors in the adjustment of the dose amount to be applied is reduced.
Diese Aufgabe wird gelöst durch eine Vorrichtung zum dosierten Ausbringen eines Mediums aus einem Behälter, der einen Kolben umfasst, insbesondere aus einer Spritze, gemäß dem Anspruch 1. Vorteilhafte Ausführungen ergeben sich aus den Merkmalen der abhängigen Ansprüche.This object is achieved by a device for the metered dispensing of a medium from a container comprising a piston, in particular from a syringe, according to
Die Vorrichtung zum dosierten Ausbringen eines Mediums aus einem Behälter, der einen Kolben umfasst, mittels Herabdrücken des Kolbens, umfasst: ein Gehäuse; einen Ausbringmechanismus mit einem Ausbringelement; ein Betätigungselement, das von einem ersten Anschlag zu einem zweiten Anschlag bewegbar ist, wobei das Betätigungselement mit dem Ausbringmechanismus gekoppelt ist, sodass bei der Bewegung des Betätigungselements vom ersten Anschlag zum zweiten Anschlag das Ausbringelement den Kolben um eine Strecke herabdrückt; und einen Einstellmechanismus zum Einstellen der pro Bewegung des Betätigungselements vom ersten Anschlag zum zweiten Anschlag zurückgelegten Strecke des Ausbringelements, wobei der Einstellmechanismus durch Drehung eines Einstellelements stufenartig einstellbar ist und wenigstens einen zylindrischen Wandabschnitt aufweist. Die Vorrichtung umfasst außerdem ein Anzeigeelement, das aufweist: eine spaltartige Öffnung im Gehäuse, durch die ein spaltartiger Teilbereich des zylindrischen Wandabschnitts von außerhalb des Gehäuses sichtbar ist; und eine tabellarische Aufstellung der Mengen, die bei einer Bewegung des Betätigungselements vom ersten Anschlag zum zweiten Anschlag für eine vorgegebene Anzahl verschiedener Spritzentypen bei unterschiedlichen stufenartigen Einstellungen des Einstellmechanismus jeweils ausgebracht werden, wobei die tabellarische Aufstellung am zylindrischen Wandabschnitt angeordnet ist.The apparatus for metering a medium from a container comprising a piston by depressing the piston comprises: a housing; a dispensing mechanism with a dispensing element; an actuator movable from a first stop to a second stop, the actuator coupled to the dispensing mechanism such that upon movement of the actuator from the first stop to the second stop, the dispensing member depresses the piston a distance; and an adjusting mechanism for adjusting the distance of the dispensing element traveled from the first stop to the second stop per movement of the actuating element, wherein the adjusting mechanism is step-adjustable by rotation of an adjusting element and has at least one cylindrical wall portion. The device further comprises a display element comprising: a gap-like opening in the housing through which a slit-like portion of the cylindrical wall portion is visible from outside the housing; and a tabulation of the quantities that are respectively applied during a movement of the actuating element from the first stop to the second stop for a predetermined number of different types of syringes at different step-like settings of the adjusting mechanism, wherein the tabular list is arranged on the cylindrical wall portion.
Die Vorrichtung ist ein sogenannter Handdispenser oder eine Pipette für das Ausbringen von Seriendosierungen, bspw. im Volumenbereich zwischen 1 µl und 5 ml. Durch Betätigen eines Betätigungselements, bspw. eines Druckknopfs wird pro Betätigung bzw. Betätigungszyklus der Kolben der Spritze um eine dem gewünschten Dosiervolumen entsprechende Strecke herabgedrückt. Dieser Vorgang wird wiederholt, bis die Spritze entleert ist bzw. bis die Seriendosierung abgeschlossen ist.The device is a so-called hand dispenser or a pipette for dispensing series dosages, for example in the volume range between 1 .mu.l and 5 ml. By actuating an actuating element, for example a pushbutton, the piston of the syringe is adjusted to the desired dispensing volume per actuation or actuation cycle pressed down corresponding route. This process is repeated until the syringe is empty or until the series dose is complete.
Das Betätigungselement ist mit dem Ausbringmechanismus, der ein Ausbringelement aufweist, das unmittelbar mit dem Spritzenkolben zusammenwirkt, so gekoppelt, dass bei einem vollständigen Herabdrücken des Betätigungselements von einem ersten Anschlag zu einem zweiten Anschlag das Ausbringelement genau um den richtigen, voreingestellten Kolbenhub bewegt wird.The actuator is coupled to the dispensing mechanism having a dispensing member that directly engages the syringe plunger such that upon a complete depression of the actuator from a first stop to a second stop, the dispensing member is moved precisely the correct, preset piston stroke.
Um das korrekte Volumen einstellen zu können, weist die erfindungsgemäße Vorrichtung einen Einstellmechanismus auf. Im Rahmen der Erfindung weist der Einstellmechanismus ein Einstellelement auf, mit dessen Hilfe ein zylindrischer Wandabschnitt, insbesondere eine Hülse bzw. Stelltrommel, relativ zum Gehäuse zwischen verschiedenen radialen Einstellungen, insbesondere stufenweise, verstellbar ist. Diese Einstellung bestimmt die Übersetzung zwischen dem Betätigungsweg des Betätigungselements und der Bewegungsstrecke des Ausbringelements. Der Ausbringmechanismus kann außerdem eine Klinke aufweisen, die, nachdem das Betätigungselement über eine bestimmte Strecke bewegt wurde, in eine entsprechende Gegenverzahnung des Ausbringelements eingreift. Das Betätigungselement ist relativ zur Stelltrommel in axialer Richtung beweglich angeordnet, die Stelltrommel ist axial relativ zum Gehäuse unbeweglich angeordnet. Je nach Winkelstellung der Stelltrommel wird die mit dem Betätigungselement gekoppelte Klinke über eine Wegstrecke vor dem Eingriff in die Gegenverzahnung des Ausbringelements blockiert, so lange die Klinke entlang der Innenwand der Hülse entlanggeschoben wird. Am unteren Rand der Hülse, also nach Durchlaufen einer bestimmten Wegstrecke des Betätigungselements, rastet die Klinke unter Einwirkung einer Kraft (z.B. erzeugt durch ein elastisches Element) in eine Gegenverzahnung ein. Je nach Winkelstellung des Einstellmechanismus bzw. der Stelltrommel gerät somit die Klinke früher oder später in Eingriff mit der Gegenverzahnung. Da die Gegenverzahnung Teil des im Wesentlichen starren Ausbringelements ist, schiebt die Klinke das Ausbringelement bis zum Anschlag des Betätigungselements am zweiten Anschlag nach unten. Anschließend bewegen sich das Betätigungselement und die Klinke unter dem Einfluss einer Rückstellkraft (z. B. einer Feder) wieder in die Ausgangsposition zum ersten Anschlag hin. Die Klinke ist dabei so ausgebildet, dass sie beim Zurückgehen zum ersten Anschlag außer Eingriff mit der Gegenverzahnung gerät, diese also in ihrer Position entsprechend dem zweiten Anschlag belässt. Die Klinke bewegt sich somit zurück in die Stelltrommel in ihre Ausgangsposition. Der Betätigungszyklus wird nun wiederholt, bis der Seriendosiervorgang beendet ist.In order to set the correct volume, the device according to the invention has an adjustment mechanism. In the context of the invention, the adjustment mechanism has an adjusting element by means of which a cylindrical wall section, in particular a sleeve or setting drum, is adjustable relative to the housing between different radial settings, in particular stepwise. This setting determines the ratio between the actuating travel of the actuator and the travel distance of the dispensing element. The dispensing mechanism may also comprise a pawl, which, after the actuating element has been moved over a certain distance, engages in a corresponding counter-toothing of the dispensing element. The actuating element is arranged movable relative to the adjusting drum in the axial direction, the adjusting drum is arranged immovable axially relative to the housing. Depending on the angular position of the adjusting drum, the pawl coupled to the actuating element is blocked over a distance before engagement in the counter-toothing of the dispensing element, as long as the pawl is pushed along the inner wall of the sleeve. At the lower edge of the sleeve, ie after passing through a certain distance of the actuating element, the pawl engages in a counter-toothing under the action of a force (for example generated by an elastic element). Depending on the angular position of the adjusting mechanism or the adjusting drum, the pawl thus sooner or later engages with the counter-toothing. Since the counter-toothing is part of the substantially rigid Ausbringelements, pushes the Ausbringelement until the stop of the actuating element on the second stop down. Subsequently, the actuating element and the pawl move under the influence of a restoring force (eg a spring) back into the starting position towards the first stop. The pawl is designed so that it gets out when going back to the first stop out of engagement with the counter teeth, so this leaves in position corresponding to the second stop. The pawl thus moves back into the adjusting drum to its original position. The actuation cycle is now repeated until the serial dosing operation is completed.
Erfindungsgemäß weist das Gehäuse eine im Bezug auf die Stelltrommel axiale, spaltartige Ausnehmung bzw. Öffnung bzw. Fenster auf. Durch diese Öffnung kann die im Bereich der Öffnung angeordnete Spalte der Tabelle von außen gesehen werden. Bei unterschiedlichen Winkelstellungen der Stelltrommel werden unterschiedliche Spalten der Tabelle sichtbar, so dass die Dosiermenge für jeden Spritzentypen in einfacher Weise und mit verringerter Fehleranfälligkeit abgelesen werden kann. Die tabellarische Aufstellung enthält spaltenweise jeweils die Angabe der Ausbringmenge pro Betätigung des Betätigungselements für die verschiedenen Spritzentypen bei der jeweiligen Einstellung des Einstellmechanismus, zeilenweise die Ausbringmenge für einen bestimmten Spritzentyp bei den verschiedenen stufenartigen Einstellungen des Einstellmechanismus.According to the invention, the housing has an axial, gap-like recess or opening or window with respect to the adjusting drum. Through this opening, arranged in the region of the opening column of the table can be seen from the outside. At different angular positions of the adjusting drum different columns of the table are visible, so that the dosage for each type of syringe can be read in a simple manner and with reduced error rate. The tabulated list contains, column by column, the indication of the application rate per actuation of the actuating element for the various types of syringes at the respective setting of the setting mechanism, line by line the application rate for a particular type of syringe at the various step-like settings of the setting mechanism.
Die spaltartige Öffnung ist insbesondere relativ zum zylindrischen Wandabschnitt derart angeordnet, dass für eine bestimmte Einstellungsstufe des Einstellmechanismus die passende Ausbringmenge pro Betätigung des Betätigungselements für jeden der Spritzentypen sichtbar ist.The gap-like opening is particularly arranged relative to the cylindrical wall portion such that for a particular setting stage of the adjustment mechanism the appropriate application rate per actuation of the actuating element for each of the syringe types is visible.
An der Gehäuseaußenwand sind neben der spaltartigen Öffnung Angaben der verschiedenen Spritzentypen und/oder Angaben zu Eigenschaften der verschiedenen Spritzentypen angeordnet.On the outer wall of the housing, in addition to the gap-like opening, information of the various types of syringe and / or details of properties of the various types of syringe are arranged.
Der Einstellmechanismus umfasst vorzugsweise eine Klinke und eine Gegenverzahnung, z. B. eine Zahnstange, wobei die Klinke bei unterschiedlichen Einstellungen des Einstellmechanismus nach unterschiedlichen Bewegungsstrecken des Betätigungselements zwischen den Anschlägen in die Gegenverzahnung eingreift.The adjustment mechanism preferably comprises a pawl and a counter-toothing, for. B. a rack, wherein the pawl engages at different settings of the adjustment mechanism after different movement distances of the actuating element between the stops in the counter-toothing.
Der Einstellmechanismus kann insbesondere ein Blockierelement umfassen, das den Eingriff der Klinke in die Gegenverzahnung blockiert, bis das Betätigungselement um eine bestimmte Bewegungsstrecke nach unten gedrückt ist, wobei die Bewegungsstrecke von der Einstellung des Einstellmechanismus abhängt.In particular, the adjustment mechanism may comprise a blocking element which blocks the engagement of the pawl in the counter teeth until the actuating element is pressed down by a certain distance of movement, the distance of movement depending on the setting of the adjusting mechanism.
Das Gehäuse weist insbesondere eine Aufnahme zum Anbringen einer Spritze am Gehäuse auf.The housing in particular has a receptacle for attaching a syringe to the housing.
Die Vorrichtung kann außerdem eine Verriegelung zum Befestigung des Kolbens am Ausbringelement aufweisen.The device may also include a latch for securing the piston to the dispensing element.
Die Vorrichtung kann ein Aufzugelement mit einem Betätigungsschieber zum Aufziehen der Spritze aufweisen. So kann der Kolben aus dem Spritzenkörper herausgezogen und die Spritze damit aufgezogen werden, bevor die Seriendosierung beginnt.The device may comprise an elevator element with an actuating slide for mounting the syringe. Thus, the piston can be pulled out of the syringe body and the syringe are drawn up before the series dosing begins.
Das Aufzugelement und die Verriegelung sind insbesondere gekoppelt.The elevator element and the lock are in particular coupled.
Vorzugsweise weist die Vorrichtung einen Rückstellmechanismus aufweist, der eine (Rückstell-)Kraft auf das Betätigungselement in Richtung des ersten Anschlags ausübt.Preferably, the device has a return mechanism that exerts a (restoring) force on the actuating element in the direction of the first stop.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der Beschreibung eines bevorzugten Ausführungsbeispiels anhand der Figuren.
Figur 1- ist eine perspektivische Ansicht einer Dosiervorrichtung gemäß einer Ausführungsform der Erfindung.
- Figur 2
- ist eine Ansicht einzelner Komponenten der erfindungsgemäßen Dosiervorrichtung.
- Figur 3
- ist eine Ansicht weiterer Komponenten der erfindungsgemäßen Dosiervorrichtung.
- FIG. 1
- is a perspective view of a metering device according to an embodiment of the invention.
- FIG. 2
- is a view of individual components of the metering device according to the invention.
- FIG. 3
- is a view of other components of the metering device according to the invention.
In der
Die Dosiervorrichtung 1 weist außerdem einen Betätigungsknopf 20 auf, der von einer ersten Anschlagstellung (oben, wie in der
Darüber hinaus weist die Dosiervorrichtung 1 ein Verstellrad 30 auf, mit dem das in einer Einzeldosierung auszubringende Volumen eingestellt werden kann. Mittels eines Schiebers 40, der von einer unteren Position 41 in die dargestellte obere Position 40 bewegt werden kann, kann die Spritze, die in eine Aufnahme 14 des Gehäuses 10 eingebracht wurde, aufgezogen werden. Der Knopf 42 ist zur Betätigung einer Verriegelung vorgesehen, mit der der Stößel bzw. Kolben der Spritze an einem entsprechenden Ausbringelement befestigt werden kann.In addition, the
In der
Ein zentrales Element der Erfindung ist eine gegenüber dem Gehäuse axial fixierte Stelltrommel 31. Diese ist über ein Stellrad 30 radial drehbar bzw. verstellbar. Auf der Stelltrommel 31 sind spaltenweise Mengenangaben der Ausbringvolumina für verschiedene Spritzentypen bei verschiedenen Einstellungen (die Einstellungsstufe ist in der letzten Zeile angegeben) in Form einer Tabelle angeordnet. Die Trommel 31 ist relativ zum Fenster 11 im Gehäuse 10 so ausgerichtet, dass bei einer bestimmten Winkeleinstellung der Trommel 31 für jeden Spritzentypen das korrekte Ausbringvolumen im Fenster 11 sichtbar ist. Zeilenweise sind die Ausbringvolumina für einen bestimmten Spritzentypen, je nach Winkeleinstellung der Trommel 31, angegeben.A central element of the invention is a relative to the housing axially fixed adjusting
Die Unterkante der Stelltrommel weist Stufen 311, 312, 313, usw., verschiedener axialer Höhe auf. Je nachdem, in welcher Winkelstellung die Trommel 31 eingestellt ist, ist der Zahnstange 44 eine bestimmte Stufe des unteren Rands der Stelltrommel 31 zugewandt. Beim Herunterdrücken des Betätigungselements 20 bewegt sich auch eine Klinke, zunächst an der Innenwand der Stelltrommel 31, nach unten. Je nach axialer Höhe der aktuell eingestellten Winkelstellung und damit Stufe (z. B. 311, 312, 313, usw.) gerät diese Klinke nun früher oder später mit der Zahnstange 44 in Eingriff und schiebt das Ausbringelement 4 in die Restwegstrecke, die das Betätigungselement 20 bis zum zweiten Anschlag durchführt, nach unten. Damit wird auch eine mit dem Ausbringelement 4 gekoppelte Kolbenstange um diese Wegstrecke nach unten geschoben, bis das gewünschte Volumen ausgebracht ist.The lower edge of the adjusting drum has
Anschließend bewegt sich das Betätigungselement 20, wie insbesondere aus der
Claims (8)
- Device (1) for dosed dispensing of a medium from a container, which comprises a plunger, by depressing the plunger, and comprising:a housing (10);a dispensing mechanism with a dispensing element (4);an actuating element (20), which can be moved from a first stop to a second stop, wherein the actuating element (20) is coupled to the dispensing element (4), such that, upon movement of the actuating element (20) from the first stop to the second stop, the dispensing element (4) depresses the plunger by a distance; and a setting mechanism (30, 31) for setting the distance travelled by the dispensing element (4) for every movement of the actuating element (20) from the first stop to the second stop, wherein the setting mechanism can be set in steps by rotation of a setting element (30) and has at least a cylindrical wall section (31);characterised by the fact thatthe device comprises a display element, comprising:a slot-shaped opening (11) in the housing (10) through which a slot-shaped portion of the cylindrical wall section (31) can be seen from outside the housing (10); and a tabular list of the quantities that are dispensed upon movement of the actuating element (20) from the first stop to the second stop for a predetermined number of different types of syringes at various step-like settings of the setting mechanism (30, 31), wherein the tabular list is arranged on the cylindrical wall section,wherein the columns of the tabular list each specify the dispensed quantity per actuation of the actuating element (20) for the different types of syringes at the particular setting of the setting mechanism, while the rows specify the dispensed quantity for a particular type of syringe at the various step-like settings of the setting mechanism (30, 31),wherein the slot-shaped opening (11) is arranged relative to the cylindrical wall section (31) such that, for a given setting step of the setting mechanism (30, 31), the corresponding dispensed quantity per actuation of the actuating element (20) can be seen for each type of syringe,and wherein information (12) on the various types of syringes and/or information on the properties of the various types of syringes is located beside the slot-shaped opening (11) at the housing.
- Device in accordance with any of the previous claims, characterised by the fact that the setting mechanism comprises a latch (22) and a counter-toothing (44) wherein, at various settings of the setting mechanism (30, 31), said latch (22) engages between the stops with the counter-toothing (44) after various movement distances by the actuating element (20).
- Device in accordance with claim 2, characterised by the fact that the setting mechanism comprises a blocking element (31), which blocks the engagement of the latch (22) with the counter-toothing (44) until the actuating element (20) is depressed downwards by a certain movement distance, wherein the movement distance depends on the setting of the setting mechanism (30, 31).
- Device in accordance with any of the previous claims, characterised by the fact that the housing (10) has a receptacle (14) for attaching a syringe to the housing (10).
- Device in accordance with any of the previous claims, characterised by the fact that the device comprises a locking mechanism (42, 43) for fastening the plunger to the dispensing element (4).
- Device in accordance with any of the previous claims, characterised by the fact that the apparatus comprises a filling element having an actuating slider (40) for filling the syringe.
- Device in accordance with claim 6, characterised by the fact that the filling element and the locking mechanism (42, 43) are coupled.
- Device in accordance with any of the previous claims, characterised by the fact that the device has a restoring mechanism (21) which exerts a force on the actuating element (20) in the direction of the first stop.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102012102292A DE102012102292A1 (en) | 2012-03-19 | 2012-03-19 | Device for repeated dosing with display |
PCT/EP2013/053835 WO2013117774A1 (en) | 2012-03-19 | 2013-02-26 | Device having a display for repeatedly dosing |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2827989A1 EP2827989A1 (en) | 2015-01-28 |
EP2827989B1 true EP2827989B1 (en) | 2016-04-06 |
Family
ID=47891611
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13709794.5A Not-in-force EP2827989B1 (en) | 2012-03-19 | 2013-02-26 | Device having a display for repeatedly dosing |
Country Status (6)
Country | Link |
---|---|
US (1) | US9352311B2 (en) |
EP (1) | EP2827989B1 (en) |
DE (1) | DE102012102292A1 (en) |
DK (1) | DK2827989T3 (en) |
ES (1) | ES2569200T3 (en) |
WO (1) | WO2013117774A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3010518A1 (en) * | 2013-09-12 | 2015-03-13 | Gilson Sas | SAMPLE PIPETTE HAVING AN IMPROVED DEVICE FOR ADJUSTING AND DISPLAYING A VOLUME TO BE TAKEN |
DE102014109345A1 (en) * | 2014-07-04 | 2016-01-07 | Eppendorf Ag | Pipette for actuating a syringe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5104624A (en) * | 1989-10-20 | 1992-04-14 | Costar Corporation | Pipetter |
US5320810A (en) * | 1992-05-13 | 1994-06-14 | Integrated Instrument Services, Inc. | Pipette with an axially stationary volume adjusting wheel |
DE9415847U1 (en) | 1994-09-30 | 1994-12-08 | Ritter, Ralf, 86150 Augsburg | Repeater pipette |
-
2012
- 2012-03-19 DE DE102012102292A patent/DE102012102292A1/en not_active Withdrawn
-
2013
- 2013-02-26 US US14/386,754 patent/US9352311B2/en active Active
- 2013-02-26 WO PCT/EP2013/053835 patent/WO2013117774A1/en active Application Filing
- 2013-02-26 ES ES13709794.5T patent/ES2569200T3/en active Active
- 2013-02-26 EP EP13709794.5A patent/EP2827989B1/en not_active Not-in-force
- 2013-02-26 DK DK13709794.5T patent/DK2827989T3/en active
Also Published As
Publication number | Publication date |
---|---|
US20150050198A1 (en) | 2015-02-19 |
EP2827989A1 (en) | 2015-01-28 |
WO2013117774A1 (en) | 2013-08-15 |
DK2827989T3 (en) | 2016-07-25 |
US9352311B2 (en) | 2016-05-31 |
ES2569200T3 (en) | 2016-05-09 |
DE102012102292A1 (en) | 2013-08-01 |
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