Pipetting device and method for assembling pipetting device

Abstract

The invention relates to a pipetting device for receiving and releasing a volume of fluid. The pipetting apparatus has a housing comprising a base body enclosing a cavity and having an inner side, an outer side, and an opening defining the cavity. The pipetting apparatus has a fitting assembly that includes a plurality of components of the pipetting apparatus. The assembly component can be introduced into the cavity of the base body through the opening of the base body for assembly, is arranged in the cavity of the base body in the assembled state, and is detachably fastened on the base body. A first guide device is formed on the inner side of the base body. And a second guide device is formed on the assembling component. The first guide device and the second guide device are at least temporarily engaged during the assembly of the assembly component and in the assembled state of the assembly component.

Description

Technical Field

[0001] The invention relates to a pipetting device for receiving and releasing fluid volumes or for manipulating liquids, and to a method for assembling a pipetting device. Background Art

[0002] Liquid transfer devices are basically known from the prior art. Liquid transfer devices usually have a housing and a plurality of components which are at least partially arranged in the housing. Liquid transfer devices are precision instruments, in which the various components must be processed and assembled very accurately and precisely. When assembling the liquid transfer device, it is important to position the various components correctly in each case, so as to ensure that the liquid transfer device functions stably or without defects and to ensure high precision during the transfer, in particular when transferring very small fluid volumes.

[0003] Therefore, it is important to ensure that the various components of the pipetting device are accurately positioned during assembly. In addition, with regard to efficient or cost-effective manufacturing processes, it is desired to automate and / or simplify the assembly of the pipetting device as much as possible or eliminate potential sources of error that may cause incorrect assembly or even damage during assembly. Summary of the invention

[0004] It is therefore an object of the present invention to provide a solution by which the assembly of a pipetting device can be optimized, in particular in such a way that the assembly can be carried out as automatically, quickly, simply and / or without errors as possible.

[0005] This object is achieved by a pipetting device according to claim 1 or a method according to claim 21. Advantageous developments are the subject matter of the dependent claims.

[0006] Liquid transfer device according to the present invention is configured to receive and release fluid volume and has a housing and an assembly. The housing has a matrix, which surrounds a cavity and has an inner side, an outer side and an opening that define the cavity. The assembly has a plurality of components of the liquid transfer device. The assembly can be introduced into the cavity of the matrix via the opening of the matrix to assemble. Under the assembled state, the assembly is arranged in the cavity of the matrix and is detachably fastened to the matrix.

[0007] A first guide device is formed on the inner side of the base body and a second guide device is formed on the assembly component. During assembly of the assembly component and in the assembled state of the assembly component, the first guide device is at least temporarily engaged with the second guide device.

[0008] The guides make it easier to assemble the pipetting device or the assembly assembly. In particular, errors during assembly can be prevented by the guides. In other words, correct assembly is preferably made easier or ensured by the guides.

[0009] The pipetting device preferably has the following:

[0010] - a displacement device, in particular a piston-cylinder device, which has

[0011] - displacement parts, in particular pistons, and

[0012] - displacement housing, in particular a cylinder block;

[0013] - a drive device for moving the displacement member in the displacement housing,

[0014] - wherein the movement of the displacement member is limited by an upper stop, a lower stop and at least one cooperating stop of the drive device and / or of the displacement member, thereby defining the stroke of the displacement member,

[0015] a volume display for displaying a pipetting volume matched to or linked to the stroke of the displacement element,

[0016] a setting device, which is designed to change the stroke of the displacement member, in particular to change the position of the upper stop, and

[0017] - Adjustment display for showing the calibrated value of the stroke of the displacement member.

[0018] The assembly component preferably comprises at least one component of the volume display and / or at least one component of the setting device and / or at least one component of the adjustment display. The assembly of the pipetting device is made easier by providing a corresponding assembly component.

[0019] The first guide device and the second guide device preferably define the introduction path for introducing the assembly into the matrix, thereby blocking or preventing the assembly from being introduced from a path different from the limited introduction path, and / or enabling the assembly to be introduced into the matrix only along the limited introduction path. In other words, the introduction path defined by the first guide device and the second guide device is preferably the only path where the assembly can be assembled or introduced into the matrix. Therefore, the forced guidance of the assembly is preferably achieved by the guide device. Thus, for example, the wrong assembly caused by the wrong arrangement or orientation of the parts of the liquid transfer device is prevented.

[0020] The first guide device preferably has a guide rail which is particularly elongated and / or extends parallel to the longitudinal axis of the pipetting device or the housing or the substrate to guide the assembly when assembling the assembly. The guide rail is particularly configured as a protrusion on the inner side of the substrate. This makes it possible to guide the assembly in a simple manner during assembly.

[0021] Particularly preferably, the first guide device has two guide rails, preferably of identical structure, which are used to guide the assembly component when assembling the assembly component, wherein the guide rails are arranged relative to each other. In particular, the guide rails are arranged symmetrically or mirror-symmetrically, in particular symmetrically or mirror-symmetrically about the longitudinal axis of the pipetting device or the housing. This improves the guidance of the assembly component during assembly.

[0022] The first guide device preferably has a stop element. The stop element is preferably configured as a bent shape. Thus, preferably a stop portion is formed in multiple directions, so that at the end of assembly or after assembly is completed, the assembly component is fixed or locked in a form-fitting manner in multiple directions by the stop element.

[0023] Preferably, the stop element forms or has the center of rotation of the assembly, or the blocking element forms or has the preferably horizontal axis of rotation of the assembly. Therefore, it is particularly pre-set that the assembly rotates around the stop element when the assembly is introduced into the substrate or when the assembly is assembled. The stop element forms the center of rotation of the assembly or the axis of rotation of the assembly. The term "axis of rotation" is particularly understood here as a virtual or imaginary axis around which the assembly rotates. A "horizontal" axis of rotation is particularly understood as an axis of rotation extending perpendicular to the longitudinal axis of the pipetting device or the housing.

[0024] Particularly preferably, the first guide device has two preferably identical stop elements, wherein the stop elements are arranged relative to each other. The stop elements are preferably arranged symmetrically or mirror-symmetrically, in particular about the longitudinal axis of the pipetting device or the housing.

[0025] The first guide preferably forms a channel into which at least a part of the second guide can be introduced, in particular into which the first guide profile of the second guide can be introduced, wherein the channel is preferably formed between the guide rail and the stop element. The channel makes it easier to introduce the assembly into the base body and to assemble the assembly without defects.

[0026] The second guide device preferably forms a channel into which at least a part of the first guide device can be introduced, in particular the guide rail of the first guide device can be introduced, wherein the channel is preferably formed between the first guide contour and the second guide contour of the second guide device. The channel makes it easier to introduce the assembly component into the base body and to assemble the assembly component without defects.

[0027] Therefore, it is particularly preferred that the first guide device and the second guide device each form a channel, into which at least a part of the respective other guide device can be introduced. In this way, the introduction path for introducing the assembly component into the housing or the base body is particularly defined, in particular in the form of forced guidance. In other words, the channel specifies the path from which the assembly component must or can be introduced into the base body. This makes assembly easier, because the assembly can only be performed by moving the assembly component along the path defined by one or more channels, thereby preventing incorrect assembly or preventing the assembly of components in a wrong orientation or posture.

[0028] Preferably, the second guide device has at least one first guide profile, at least one second guide profile and at least one third guide profile, and the at least one first guide profile, at least one second guide profile and at least one third guide profile are used to guide the assembly component along the guide rail of the first guide device. The guide profile can achieve accurate or precise guidance of the assembly component, thereby avoiding errors during assembly.

[0029] Preferably, the first guide profile is spaced apart from the second guide profile so that the guide rail can be passed between the first guide profile and the second guide profile. It is preferred that the second guide profile has or forms a first area for the guide rail to abut against during assembly and the first guide profile has or forms a second area for the guide rail to abut against during assembly. In particular, a channel or an introduction path for the assembly component is formed or defined by the spacing between the first guide profile and the second guide profile. Different areas for the guide rail to abut against are used to define or cause different movements and / or prevent unexpected movements, in particular, during the introduction of the assembly component. This allows the assembly component to automatically perform the required movement or to be guided accordingly when guiding the assembly component.

[0030] In particular, the second guide profile is connected to the third guide profile or is formed as a single piece, which helps to simplify the structure.

[0031] The stop element preferably forms a first stop for the second guide, in particular, the stop element forms a first stop for the first guide profile. Particularly preferably, the first guide profile can be placed on the first stop, in particular, wherein the first stop defines an introduction path for the assembly component. This ensures that the assembly component is correctly and precisely guided or positioned.

[0032] In addition, the stop element preferably forms a second stop for the second guide device, in particular, the stop element forms a second stop for the first guide profile. Particularly preferably, the first guide profile can be pivoted against the second stop. In particular, the final position of the assembly is determined by the second stop.

[0033] In the assembled state of the assembly component, the stop element preferably forms a shape fit with the second guide device, in particular, the stop element forms a shape fit with the first guide profile of the second guide device. Preferably, the shape fit blocks the stop element and the second guide device, and thereby blocks the relative movement in the axial direction (in particular with reference to the longitudinal axis of the pipetting device or the housing) and / or the circumferential direction between the assembly component and the base. In particular, the first guide profile surrounds the stop element. The position of the assembly component is preferably determined or the assembly component is fixed in the housing or the base by the shape fit of the stop element and the first guide profile or the first guide profile surrounding the stop element. Thus, in particular, not only is it easier to introduce the assembly component or to assemble it correctly, but it is also possible to fix the assembly component at the end of or after the assembly is completed by the guide device. As a result, additional fixings or fasteners can be discarded, or the displacement of the assembly component in the base before or when it is (additionally) fixed by fasteners such as screws can be reduced or prevented.

[0034] The first guide contour preferably abuts against the first stop and the second stop in the assembled state of the assembly, which results in the assembly being fixed in multiple directions.

[0035] Furthermore, in the assembled state of the assembly, the guide rail preferably forms a positive fit with the second guide device, in particular, wherein the guide rail at least partially rests on the first guide contour, the second guide contour and the third guide contour, thereby preferably fixing the assembly in the base body.

[0036] Preferably, the assembly is connected to the housing, in particular to the connecting element, in the assembled state by means of a fastener, in particular a screw, a pin or a rivet. The fastener in particular blocks a relative movement between the assembly and the base body in the radial direction and / or in the axial direction and / or in the circumferential direction.

[0037] According to another aspect, which can also be realized independently, the invention relates to a method for assembling a pipetting device, comprising the following steps:

[0038] a) providing a pipetting device, in particular a pipetting device constructed as described herein,

[0039] b) introducing the assembly component into the cavity of the base body through the opening of the base body,

[0040] c) engaging the second guide means with the first guide means,

[0041] d) moving the assembly along the first guide until the second guide abuts against the stop of the first guide, and

[0042] e) Rotating the assembly about a preferably horizontal axis of rotation into the final position of the assembly.

[0043] The aforementioned aspects and features of the invention as well as the aspects and features of the invention resulting from the further description can be realized independently of one another but also in any combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Further advantages, features, characteristics and aspects of the present invention result from the claims and the subsequent description of preferred embodiments with the aid of the accompanying drawings. In the drawings:

[0045] Figure 1 A three-dimensional schematic diagram of a liquid transfer device according to the present invention is shown;

[0046] Figure 2 shows an exploded schematic diagram of a pipetting device;

[0047] Figure 3 A schematic cross-sectional view of a base body of a pipetting device is shown;

[0048] Figure 4 shows a schematic, partly cut-away side view of a pipetting device in a first position during assembly;

[0049] Figure 5 shows a schematic, partly cut-away side view of the pipetting device in a second position during assembly;

[0050] Figure 6 shows a schematic, partly cut-away side view of the pipetting device in a third position during assembly;

[0051] Figure 7 shows a schematic, partly cut-away side view of a pipetting device in an assembled state;

[0052] Figure 8 A schematic cross-sectional view of the pipetting device together with the assembly components in an assembled state is shown;

[0053] Fig. 9 A perspective schematic diagram of a liquid transfer device together with assembled assembly components is shown;

[0054] Fig.10 shows a schematic section through an operating button of a pipetting device; and

[0055] Fig.11 A schematic perspective view of a portion of an assembled component is shown.

[0056] In the figures, identical reference numerals are used for identical or similar parts, wherein corresponding features and advantages are realized even if repeated descriptions are omitted for the sake of brevity. DETAILED DESCRIPTION

[0057] Figure 1 A pipetting device 1 for receiving and releasing a fluid volume is shown in a perspective view. Figure 2 The pipetting device 1 is shown in an exploded view.

[0058] The pipetting device 1 has a housing 2 , on which a user can hold and guide the pipetting device 1 with his hand.

[0059] Figure 1 The pipetting device 1 or the housing 2 shown in the figure preferably has an elongated shape and has a longitudinal axis L. The longitudinal axis L preferably extends centrally through the pipetting device 1 or through the housing 2 .

[0060] If terms such as "axial", "axial direction" etc. are used hereinafter, they are based on the longitudinal axis L. Correspondingly, terms such as "radial", "radial direction" etc. are likewise based on the longitudinal axis L and identify directions perpendicular to the longitudinal axis L. If terms such as "upper", "lower" etc. are used hereinafter, they are preferably based on the extension of the longitudinal axis L and in particular on the longitudinal axis L. Figure 1 The position of the pipetting device 1 (in the assembled state) shown in the figure is taken as the reference, which corresponds in particular to the position of use of the pipetting device 1 when it is used or held by the user. In addition, a "horizontal" direction or extension, etc. is preferably understood as a direction or extension, etc. perpendicular to the longitudinal axis L (in the assembled state of the pipetting device 1). Correspondingly, a "vertical" direction or extension, etc. is understood as a direction or extension, etc. parallel to the longitudinal axis L.

[0061] The housing 2 preferably has a base body 3. The longitudinal axis L is preferably the longitudinal axis and / or the axis of symmetry of the base body 3. The base body 3 is therefore preferably symmetrical, in particular mirror-symmetrical, with respect to the plane of symmetry in which the longitudinal axis L lies.

[0062] The substrate 3 is particularly Figure 3 Detailed drawing in which the base body 3 is cut along the longitudinal axis L or the symmetry plane of the base body 3 and is drawn "open". In particular, Figure 3 The inner structure of the base body 3 is thus shown.

[0063] Preferably, the housing 2 is composed of a plurality of parts. In particular, the housing 2 has a connecting part 4 in addition to the base body 3 .

[0064] The connecting element 4 can preferably be arranged or fastened on the base body 3. In particular, the base body 3 can be at least partially closed by means of the connecting element 4 or the base body 3 and the connecting element 4 fastened thereto form a housing 2 which is closed at least radially with respect to the longitudinal axis L.

[0065] The housing 2 or the base body 3 preferably encloses a cavity 5. The cavity 5 preferably extends at least substantially along the longitudinal axis L. Preferably, the cavity 5 is delimited at least radially relative to the longitudinal axis L by the housing 2 or the base body 3 and / or the connecting element 4. Preferably, with reference to the position drawn in the figures, the cavity 5 is open upward and / or downward, i.e., is open on the upper side and / or the lower side of the housing 2 or the base body 3.

[0066] The housing 2 or the base body 3 has an inner side 6 and an outer side 7. In particular, the inner side 6 delimits the cavity 5, at least in the radial direction.

[0067] Preferably, the connecting element 4 forms together with the base body 3 a closed inner side 6 and / or outer side 7 of the housing 2. The connecting element 4 preferably ends on the outer side 7 flush with the base body 3.

[0068] The housing 2 or the base body 3 preferably has an opening 8. The opening 8 is preferably arranged at least partially at the upper end of the base body 3. In particular, the opening 8 is not arranged only at the upper end of the base body 3, but can also be arranged laterally. The base body 3 is therefore preferably also partially open laterally or in the radial direction. In particular, the base body 3 therefore has a cutout in the radial direction relative to the longitudinal axis L or the opening 8 extends downward from the upper side of the base body 3.

[0069] The connecting element 4 is preferably connectable to the base body 3 , in particular connectable in a snap-fitting or form-fitting manner.

[0070] The base body 3 and / or the connecting piece 4 preferably have one or more snap-fit ​​elements 9, in particular, a lock or a lock hook. In particular, the base body 3 and the connecting piece 4 each have at least one snap-fit ​​element 9, wherein the snap-fit ​​elements 9 of the base body 3 and the connecting piece 4 correspond to each other or engage with each other in the assembled state of the pipetting device 1 or the housing, so that the connecting piece 4 is connected to the base body 3 in a form-fitting manner.

[0071] Preferably, the base body 3 and / or the connecting element 4 have one or more protrusions 10 for connecting the connecting element 4 to the base body 3. In particular, the base body 3 and the connecting element 4 each have at least one, in particular multiple and / or symmetrically arranged, mutually corresponding protrusions 10. When the connecting element 4 is connected to the base body 3 or fastened thereto, the protrusions 10 preferably form a tongue-and-groove joint. One or more protrusions 10 of the base body 3 are preferably arranged at the upper end of the base body 3 or at one end or edge facing the connecting element 4. One or more protrusions 10 of the connecting element 4 are preferably arranged at the lower end of the connecting element 4 or at one end or edge facing the base body 3. The protrusions 10 preferably extend at least substantially in a direction parallel to the longitudinal axis L. When the connecting element 4 is connected to the base body 3, the protrusions 10 of the connecting element 4 preferably abut against the inner side 7 of the base body 3.

[0072] The pipetting device 1 preferably has a displacement device (not shown in the drawings). The displacement device preferably has a displacement element, in particular a piston, and a displacement housing, in particular a cylinder. The displacement device is therefore in particular designed as a piston-cylinder device.

[0073] The displacement device is designed to collect fluids, in particular liquids, into the pipetting device 1, in particular to a pipette tip (not shown) of the pipetting device 1 and subsequently release it again from the pipetting device. The displacement device can be completely or partially separated from the pipetting device 1 or the housing 2.

[0074] The longitudinal axis L preferably extends centrally through the displacement device, in particular through the displacement element and the displacement housing.

[0075] Preferably, the pipetting device 1 has a drive device 11. The drive device 11 is designed to move a displacement member in a displacement housing. Preferably, the movement of the displacement member is limited. Thereby, the stroke of the displacement member is particularly limited or restricted.

[0076] The pipetting device 1 preferably has a volume display 12 for displaying the pipetting volume. The pipetting volume is preferably adapted to the stroke of the displacement element or is correlated with the stroke of the displacement element.

[0077] In addition, the pipetting device 1 preferably has a setting device 13. The setting device 13 is particularly configured to change the stroke, and is particularly preferably configured to change the position of the upper stop. In other words, the stroke of the displacement member, in particular, the pipetting volume can be set or changed by means of the setting device 13.

[0078] The pipetting device 1 preferably has a control display 14. The control display 14 is designed in particular to display a calibration value of the stroke of the displacement element.

[0079] The adjustment display 14 is designed to display and / or prescribe or set a calibration value for the stroke of the displacement element. This calibration value is obtained by adapting the pipetting volume and the stroke so that the display 12 can be associated with the actual or at least substantially actually released pipetting volume. The calibration value specifies the extent to which potential errors are to be taken into account.

[0080] The adjustment display 14 preferably has at least one digital wheel which is rotatable about the longitudinal axis L and which displays a scale for the calibration value of the stroke of the displacement element.

[0081] The adjustment display 14 preferably has a device for fixing the position, in particular an elastic element. The elastic element is particularly implemented as an integrated snap-in spring 14A. The device for fixing the position of the adjustment display 14 or the snap-in spring 14A is Fig.11 Draw it in.

[0082] The pipetting device 1 has an assembly 15. The assembly 15 has a plurality of components of the pipetting device 1 or is formed from a plurality of components of the pipetting device 1.

[0083] An assembly component within the meaning of the present invention is, in particular, a component formed by multiple components of the pipetting device 1, which are pre-assembled or (fixedly) connected to each other so that they together form a unit and can, in particular, be introduced together or as a unit into the housing 2 or the base body 3 of the pipetting device 1 and / or assembled therein.

[0084] The assembly 15 preferably has a longitudinal axis A. In particular, the assembly 15 extends substantially along the longitudinal axis A and / or the longitudinal axis A extends at least substantially through the assembly 15. In the assembled state of the assembly 15, the longitudinal axis A of the assembly 15 is preferably parallel to the longitudinal axis L of the pipetting device 1 or the housing 2, in particular identical thereto.

[0085] In order to assemble the pipetting device 1 or the assembly 15, the assembly 15 is introduced into the base body 3 and preferably fixed or fastened in the base body 3. The connecting element 4 is then preferably arranged on the base body 3 or fastened thereto. This will be explained in more detail later, in particular with reference to the diagram showing the different steps in the assembly or the different positions of the assembly 15. Figures 4 to 7 .

[0086] In particular, the assembly component 15 can be introduced into the cavity 5 through the opening 8 of the base body 3 for assembly.

[0087] In the assembled state, the assembly component 15 is at least partially arranged in the cavity 5 and is detachably fastened to the base body 3 .

[0088] The pipetting device 1 has a first guide device 16 and a second guide device 17. The first guide device and the second guide device 16, 17 correspond to each other. In particular, the guide devices 16, 17 are configured to guide the assembly component 15 during assembly or when the base body 3 is introduced, or to limit or determine the introduction path or forced guidance for the assembly component 15.

[0089] exist Figures 4 to 7 1 and 2 show the mounting assembly 15 in a side view and the base body 3 in a sectional view, wherein the section is located on the side of the base body 3 facing the observer and is selected so that the section extends through the first guide 16 or its guide rail 20 and the stop element 21. From the perspective of the observer in the figure, the mounting assembly 15 is therefore located behind the guide rail 20 and the stop element 21.

[0090] The first guide device 16 is preferably arranged or formed on the inner side 6 of the base body 3. In particular, the guide device 16 is formed by a bulge on the inner side 6 of the base body 3.

[0091] The second guide device 17 is preferably arranged or formed on the mounting component 15 , in particular on the outside of the mounting component 15 .

[0092] The first and second guide means 16 , 17 are preferably designed to correspond to each other and / or to slide along or contact and / or guide each other during assembly of the pipetting device 1 or the assembly unit 15 and / or to engage with each other after assembly.

[0093] In particular, the first guide device and the second guide device 16, 17 respectively determine one or more clear positions of the assembly component 15 relative to the base body 3 during or after the assembly of the assembly component 15. In particular, it is clearly determined which position the assembly component 15 occupies or can occupy at the beginning of assembly and which positions the assembly component 15 occupies or can occupy in sequence during assembly. Thus, in particular, an introduction path or forced guidance is defined for the assembly component 15 during assembly, so that only the position defined by the guide devices 16, 17 during assembly is possible and / or the position of the assembly component 15 is clearly determined. In this way, it is possible to prevent the component from being misoriented when assembling the liquid transfer device 1 and / or cause the assembly component 15 to be automatically correctly introduced into the base body 3 and assembled therein.

[0094] The first and second guide devices 16, 17 thus specifically define an introduction path for introducing the assembly component 15 into the base body 3, so that the assembly component 15 can only be introduced into the base body 3 along the introduction path defined by the guide devices 16, 17 and / or is blocked or prevented from being introduced along a path different from the defined introduction path.

[0095] The first guide 16 in particular forms a channel 18. In particular, the first guide 16 has a plurality of sections which are spaced apart from one another so that the spaces between the sections form the channel 18. Preferably, at least a portion of the second guide 17 can be introduced into the channel 18 formed by the first guide 16.

[0096] Preferably, the second guide 17 forms a channel 19. In particular, the second guide 17 has a plurality of sections that are spaced apart from each other so that the spaces between the sections form the channel 19. Preferably, at least a portion of the first guide 16 can be introduced into the channel 19 formed by the second guide 17.

[0097] The first guide device 16 preferably has a plurality of individual or mutually separate sections or parts.

[0098] In particular, the first guide device 16 has a guide rail 20. The guide rail 20 is designed in particular for guiding the assembly component 15 or the second guide device 17 during assembly.

[0099] Furthermore, the first guide device 16 preferably has a stop element 21 . The stop element 21 is preferably spaced apart from the guide rail 20 , in particular along the circumference of the inner side 6 of the base body 3 .

[0100] The guide rail 20 and the stop element 21 are, in particular, the aforementioned sections of the first guide device 16 .

[0101] The guide rail 20 is in particular of elongated design and / or extends at least substantially parallel to the longitudinal axis L. The guide rail 20 preferably protrudes from the inner side 6 of the base body 3 or forms a bulge of the inner side 6 .

[0102] The stop element 21 preferably protrudes from the inner side 6 of the base body 3 or forms a bulge of the inner side 6. Preferably, the stop element 21 protrudes further from the inner side 6 than the guide rail 20.

[0103] Preferably, the stop element 21 is configured to be bent. In particular, the stop element 21 has a plurality of sections, in particular a first section 22 and a second section 23. The first section and the second section 22, 23 are preferably configured as one piece or connected to each other.

[0104] The first section 22 preferably extends at least substantially at a right angle to the second section 23 and / or the longitudinal axis L and / or the guide rail 20. In particular, the first section 22 forms a shoulder.

[0105] In particular, the second section 23 is of elongated design. The second section 23 preferably extends at least substantially parallel to the longitudinal axis L and / or the guide rail 20. The channel 18 is formed in particular between the stop element 21 or the second section 23 thereof and the guide rail 20.

[0106] The stop element 21 or its sections 22, 23 preferably form one or more stops 24, 25 for the second guide 17. In particular, the first section 22 has or forms a first stop 24 for the second guide 17 and / or the second section 23 has or forms a second stop 25 for the second guide 17.

[0107] The first stop 24 preferably extends at least substantially horizontally or perpendicularly to the longitudinal axis L / A. The second stop 25 preferably extends at least substantially vertically or parallel to the longitudinal axis L / A.

[0108] The stop element 21 preferably forms the center of rotation or preferably the horizontal axis of rotation of the assembly 15. This is particularly due to Figure 6 and Figure 7In other words, the assembly component 15 is preferably rotatable or rotatable during assembly, wherein the axis of rotation about which the assembly component 15 rotates or turns extends through the stop element 21. In this sense, the axis of rotation is in particular a virtual or imaginary axis and not a real axis in the sense of a component.

[0109] In particular, the rotation of the assembly 15 about the rotation axis is Figure 6 The position shown in the figure is carried out to Figure 7 This will be discussed in more detail later.

[0110] The first guide device 16 is preferably constructed to be symmetrical and / or mirror-symmetrical, in particular symmetrical and / or mirror-symmetrical with respect to the longitudinal axis L or a mirror plane or a symmetry plane in which the longitudinal axis L lies. Particularly preferably, the first guide device 16 has two guide rails 20 and / or two stop elements 21 and correspondingly has two channels 18. Preferably, the guide rails 20, the stop elements 21 and / or the channels 18 are constructed or arranged to be symmetrical or mirror-symmetrical with respect to each other, in particular symmetrical and / or mirror-symmetrical with respect to the longitudinal axis L or a mirror plane or a symmetry plane in which the longitudinal axis L lies. The mirror plane or the symmetry plane is particularly Figure 3 The guide rail 20 and / or the stop element 21 are preferably each constructed to be structurally identical.

[0111] The second guide device 17 preferably has a first guide contour 26 , a second guide contour 27 and / or a third guide contour.

[0112] The guide contours 26 , 27 , 28 are in particular the aforementioned sections of the second guide device 17 .

[0113] The guide contours 26 , 27 , 28 are designed in particular for guiding the first guide device 16 , in particular the guide rail 20 , during the assembly of the assembly component 15 or during the introduction of the assembly component 15 into the base body 3 .

[0114] The guide contours 26 , 27 , 28 are preferably each designed as a projection on an outer surface of the component part 15 or of a component of the component part 15 , in particular an at least substantially smooth and / or cylindrical outer surface.

[0115] Preferably, the first guide profile 26 and / or the second guide profile 27 protrude further outwards or the first guide profile 26 and / or the second guide profile 27 are at a greater distance from the longitudinal axis L / A than the third guide profile. In other words, the guide profile 28 is preferably offset inwards relative to the first guide profile 26 and / or the second guide profile 27. The outwardly directed surfaces of the first guide profile 26 and the second guide profile 27 are preferably in a common plane, which in particular extends parallel to the longitudinal axis L / A.

[0116] The first guide contour 26 is preferably spaced apart from the second guide contour 27 , in particular so that the guide rail 20 can be arranged or passed through between them or a channel 25 or at least a part of the channel is formed between them.

[0117] The first guide contour 26 preferably has one or more guide points, in particular a first guide point 30 and a second guide point 31. The guide points 30, 31 are preferably designed to contact or guide the guide rail 20 when the assembly 15 is introduced into the base body 3.

[0118] A guide point within the meaning of the invention preferably has at least one point which is designed for contacting or guiding the guide rail 20. However, the guide point can also be designed in a linear or planar manner.

[0119] The first guide point 30 is preferably arranged at the lower end or lower side of the first guide profile 26. The second guide point 31 is preferably arranged at the upper end or upper side of the guide profile. In particular, the first guide point 30 and the second guide point 31 are arranged on the ends or sides of the first guide profile 26 that face away from each other or (axially) opposite.

[0120] The first guide point 30 is preferably configured in the form of a point or a line. The second guide point 31 is preferably configured in the form of a surface or forms a guide surface.

[0121] The first guide point 30 and the second guide point 31 are preferably arranged offset from one another (vertically and horizontally), in particular such that an (imaginary) connecting line between the first guide point 30 and the second guide point 31 runs obliquely to the longitudinal axis L / A.

[0122] The second guide point 31 forms, in particular, a region for the guide rail 20 to come into contact with during assembly and / or in the assembled state of the assembly assembly 15 .

[0123] The first guide profile 26 is particularly configured to cooperate with the stop element 21 or to be connected to the stop element 21 in a form-fitting manner. In particular, the stop element 21 forms a form fit with the first guide profile 26 in the assembled state of the assembly 15. This is particularly true in Figure 7 Visible in.

[0124] Preferably, the first guide profile 26 has one or more mating surfaces corresponding to the stop element 21. In particular, the first guide profile 21 has a first mating surface 32, a second mating surface 33 and / or a third mating surface 34.

[0125] Preferably, the first mating surface 32 and / or the second mating surface 33 extend at least substantially horizontally or perpendicularly to the longitudinal axis L / A. The first mating surface 32 preferably points downward. The second mating surface 33 preferably points upward. In particular, the stop element 21 can be arranged between the first mating surface 32 and the second mating surface 33.

[0126] The distance between the first counter surface 32 and the second counter surface 33 preferably corresponds approximately to the extension of the stop element 21 parallel to the longitudinal axis L / A, so that the stop element 21 can be clamped or fixed by friction between the counter surfaces 32 , 33 .

[0127] The third mating surface 34 preferably extends at least substantially vertically or parallel to the longitudinal axis L / A and / or perpendicularly to the first mating surface 32 and / or the second mating surface 33. The third mating surface 34 is preferably arranged between the first mating surface 32 and the second mating surface 33 (in the axial direction).

[0128] Preferably, the first mating surface 32 and / or the second mating surface 33 are adjacent to the third mating surface 34 , or the first mating surface 32 and / or the second mating surface 33 are connected to the third mating surface 34 .

[0129] In particular, the guide contour 26 is designed in one piece.

[0130] In order to form a form fit between the stop element 21 and the first guide profile 26 , the assembly component 15 or the first guide profile 26 can preferably be placed on the first stop portion 24 , in particular by means of the first mating surface 32 , and / or can be pivoted against the second stop portion 25 , in particular by means of the third mating surface 34 .

[0131] This is especially true in Figure 6 and Figure 7 Visible in: Figure 6 The figure shows a position of the assembly 15 in which the first guide contour 15 rests with the second mating surface 22 on the first stop 24. When the assembly 15 is assembled, the assembly 15 or the guide contour 26 is preferably subsequently pivoted or rotated. In particular, the stop element 21 forms the center of rotation or the axis of rotation about which the assembly 15 is pivoted or rotated, extending through the stop element 21. At the end of the pivoting or rotating movement, the assembly 15 or the first guide contour 26 is preferably in the Figure 7 The position drawn in Figure 7 In the position shown in FIG. 2 , a positive fit is formed between the first guide contour 26 and the stop element 21 . In particular, the assembly component 15 is thus fixed in the base body 3 .

[0132] The assembly 15 is preferably secured against rotation and / or axial displacement about the longitudinal axis L / A by the form fit between the stop element 21 and the first guide contour 26 .

[0133] The second guide contour 27 preferably extends transversely, in particular perpendicularly, to the longitudinal axis L / A. In particular, the second guide contour 27 laterally delimits the channel 19 or the introduction path of the guide rail 20. The second guide contour 27 is preferably designed for laterally guiding the guide rail 20.

[0134] The third guide profile 28 preferably extends at least substantially axially or parallel to the longitudinal axis L. In particular, the third guide profile 28 is designed to guide the guide rail 20 inside the guide rail 20. In particular, the guide rail 20 and the third guide profile 28 are designed so that the inner side of the guide rail 20 contacts the outer side of the third guide profile 28 or slides along it when the assembly 15 is introduced into the base body 3.

[0135] The third guide contour 28 preferably has at its upper end a transverse section 29 extending at least substantially horizontally or perpendicularly to the longitudinal axis L / A. The transverse section 29 is preferably designed so that the guide rail 20, in particular with its inner side, rests against the transverse section 29 during assembly and / or in the assembled state of the assembly assembly 15.

[0136] In addition, the second guide profile 27 is preferably configured to be connected to the guide rail 20 in a form-fitting manner. In particular, the second guide profile 27 forms a form fit with the guide rail 20 or the lower end 20A of the guide rail 20 when the assembly component 15 or the pipetting device 1 is assembled. In particular, the assembly component 15 is locked by the form fit between the second guide profile 27 and the guide rail 20 or the lower end 20A thereof to prevent it from moving axially upward, in particular.

[0137] In the assembled state of the assembly unit 15 , the second guide contour 27 preferably rests against the guide rail 20 or against the lower end 20A thereof.

[0138] The third guide contour 27 preferably secures the assembly 15 in the assembled state against tilting and / or rotation relative to the longitudinal axis L.

[0139] The second guide contour 27 and the third guide contour 28 are preferably connected to one another or are formed in one piece. The second guide contour 27 preferably extends at least substantially horizontally or perpendicularly to the longitudinal axis L.

[0140] The second guide contour 27 and the third guide contour 28 are preferably angled relative to one another, in particular are arranged at least substantially at a right angle to one another.

[0141] Preferably, the second guide profile 27 is constructed so that the guide rail 20 slides on the guide rail 20 during assembly or when the assembly component 15 is introduced into the base body 3 and a form fit is formed between the second guide profile 27 and the guide rail 20 in the assembled state, thereby preventing or blocking the assembly component 15 from moving upward parallel to the longitudinal axis L through the form fit.

[0142] The third guide contour 28 is preferably of elongated design. In particular, the third guide contour 28 extends at least substantially parallel to the first guide surface 30 and / or vertically or parallel to the longitudinal axis L.

[0143] The channel 19 of the second guide device 17 is preferably formed between the first guide contour 26 and the second guide contour 27. The guide rail 20 can preferably be arranged in the channel 19 or can be introduced into the channel 19. Preferably, the first guide contour 26, the second guide contour 27, the channel 19 and / or the guide rail 20 are designed or arranged so that the guide rail 20 can only be introduced into the channel 19 when the assembly 15 is inclined at an angle W1 relative to the longitudinal axis L. The angle W1 is formed in particular between the longitudinal axis A of the assembly 15 and the longitudinal axis L of the base body 3, in particular as Figure 4 As drawn in .

[0144] The minimum and / or maximum value of the angle W1 is preferably limited or defined by the distance or the relative arrangement between the first guide contour 26 or the first guide point 30 and the second guide contour 27. The angle W1 is preferably between 5° and 30°.

[0145] The first guide contour 26 can be arranged in particular in the channel 18 of the first guide device 16 or can be introduced into the channel 18 of the first guide device 16. The guide rail 20, the stop element 21, the channel 18 and / or the first guide contour 26 are preferably designed or arranged such that the first guide contour 26 can only be introduced into the channel 18 when the assembly 15 is inclined at an angle W2 relative to the longitudinal axis L. The angle W2 is formed in particular between the longitudinal axis A of the assembly 15 and the longitudinal axis L of the base body 3, in particular as Figure 5 and Figure 6 As drawn in .

[0146] Angle W2 is preferably smaller than angle W1. Angle W1 is preferably between 2° and 20°.

[0147] The size of the angle W2 is preferably limited or defined by the distance or the relative arrangement between the first guide contour 26 or the second guide point 31 and the second guide contour 27 .

[0148] In particular, the guide rail 20 can be passed between the first guide profile 26 and the second guide profile 27. Preferably, the guide rail 20 and the third guide profile 28 are designed or dimensioned such that the inner side of the guide rail 20 contacts the third guide profile 28 or slides along the third guide profile 28 when the guide rail 20 is passed between the first guide profile 26 and the second guide profile 27. The third guide profile 28 is therefore preferably designed for guiding the guide rail 20 from the inside. The first guide profile 26 and the second guide profile 28 are preferably designed to guide the guide rail 20 laterally, in particular from different or opposite sides.

[0149] The pipetting device 1 preferably has a fastening element 35 for fastening or fixing the assembly 15 in the housing 2. In particular, the assembly 15 is connected to the housing 2, in particular to the connecting element 4, via the fastening element 35 in the assembled state.

[0150] The fastener 35 is particularly Figure 8 and Fig. 9 Shown in. Figure 8 A section through the pipetting device 1 with the assembled assembly 15 through the longitudinal axis L / A is shown. Fig. 9 A perspective view of a pipetting device 1 is shown.

[0151] The fastening element 35 is preferably designed to block a relative movement between the mounting component 15 and the connecting element 4 and / or the base body 3 in the radial direction and / or in the axial direction and / or in the circumferential direction.

[0152] The fastener 35 is in particular a screw, a pin, a rivet or the like.

[0153] In particular, the fastening element 35 additionally serves a fastening function in order to compensate for tolerances between the connecting element 4 and the base body 3 .

[0154] In the assembled state, preferably, alternatively or in addition to the fastening, the assembly 15 is prevented from rotating about the center of rotation or about the axis of rotation by covering the volume adjustment sleeve 36 of the pipetting device 1 over the assembly 15. The volume adjustment sleeve 36 is used in particular to adjust the pipetting volume of the pipetting device 1.

[0155] The pipetting device 1 preferably has a cover plate 37. In particular, the cover plate 37 covers the fastening element 35 in the assembled state of the pipetting device 1 so that it is not visible to the user.

[0156] In particular, the cover 37 can be arranged or can be fastened in a recess of the housing 2 , in particular of the connecting part 4 , which is assigned to the cover 37 .

[0157] The cover 37 preferably has a viewing window 37A, through which the volume display 12 can be read.

[0158] The method for assembling the pipetting device 1 will be explained in more detail later. In particular, the method for assembling the pipetting device 1 constitutes an independently realizable aspect of the present invention.

[0159] Some of the steps described below may also be omitted.

[0160] Preferably, in order to assemble the pipetting device 1 , first the pipetting device 1 or its components, in particular the assembly component 15 and the base body 3 , are provided.

[0161] For assembly, the assembly component 15 is introduced into the cavity 5 through the opening 8 of the base body 3. In particular, for this purpose, the assembly component 15 or its longitudinal axis A is tilted relative to the longitudinal axis L of the base body 3, in particular as Figure 4 As drawn in .

[0162] In particular, the second guide 17 is brought into engagement with the first guide 16, in particular with the guide rail 20. In this case, the guide rail 20 is preferably guided or introduced into the channel 19 between the first guide contour 26 and the second guide contour 27.

[0163] When the second guide 17 is brought into engagement with the first guide 16 , the guide rail 20 preferably bears (particularly laterally) against the first guide contour 26 and (particularly laterally) against the second guide contour ( 27 ) and (particularly from the inside) against the third guide contour 28 .

[0164] Figure 4 The position of the assembly 15 is shown in which the upper end of the guide rail 20 has been guided past the first guide contour 26 or its first guide point 30 and the guide rail 20 contacts the second guide contour 27 .

[0165] The assembly 15 is then preferably introduced further into the base body 3. In particular, the assembly 15 is moved along the first guide 16. In this case, the guide rail 20 preferably bears against the second guide contour 27 and the first guide contour 26, in particular against the second guide point 31.

[0166] This is particularly Figure 5 Draw it in.

[0167] Before or during the further introduction of the assembly 15 into the base body 3, the angle W1 at which the assembly 15 is tilted is preferably changed, in particular reduced. In particular, when the guide rail 20 bears against the second guide contour 27 and the second guide point 31, the assembly 15 or its longitudinal axis A is (mandatorily) tilted relative to the base body 3 or its longitudinal axis L. Figure 5 The angle W2 is shown in FIG.

[0168] Preferably, the mounting assembly 15 is moved along the first guide 16 or the guide path 20 until the second guide 17 , in particular the first guide contour 26 or the second seating surface 33 thereof, rests on the stop element 21 , in particular the second stop 25 thereof.

[0169] exist Figure 6 In the position shown in FIG. 8 , the assembly component 15 rests on the second stop 25 .

[0170] During the movement of the assembly 15 along the first guide 16 or before it is placed on the stop 25, the assembly 15 is preferably locked against rotation, in particular about the longitudinal axis A / L. In particular, this locking against rotation is produced by the guide rail 20 resting against the first guide contour 26, the second guide contour 27 and / or the third guide contour 28, thereby making the assembly 15 unable to rotate.

[0171] The assembly 15 is then preferably pivoted or rotated into the final position of the assembly 15. The final position is in particular Figure 7 Draw it in.

[0172] The pivoting movement or rotation for moving the assembly 15 to the final position is particularly about a preferably horizontal axis of rotation. The axis of rotation is preferably an imaginary or virtual axis and particularly passes through the stop element 21. Thus, the stop element 21 preferably forms the center of rotation of the assembly 15.

[0173] When rotating the assembly 15 , the second guide device 17 , in particular the first guide contour 26 , is preferably rotated or pivoted against the stop element 21 or its second stop 25 .

[0174] At the end of the rotation of the assembly 15 , the second guide 17 preferably snaps into the first guide 16 . In particular, the first guide contour 26 snaps into the stop element 21 and / or the second guide contour 27 snaps into the guide rail 20 .

[0175] Optionally, the connecting element 4 is then connected to the base body 3. This is achieved in particular by engaging the latching elements 9 of the base body 3 and the connecting element 4 with one another, in particular by placing the connecting element 4 obliquely on the base body 3. Preferably, the connecting element 4 is then pivoted in the direction of the base body 3. In particular, the projection 10 of the connecting element 4 is brought into contact with the inner side 6 of the base body.

[0176] Optionally, the assembly component 15 is connected to the housing 2 , in particular to the connecting member 4 , via a fastener 35 .

[0177] Preferably, the fastening element 35 is used to firmly connect the connecting element 4 to the base body 3 on the one hand and to (additionally) fix the mounting assembly 15 in the base body 3 on the other hand.

[0178] Finally, the (only optional) cover plate 37 is preferably connected to the housing 2 or the connecting piece 4, in particular by inserting the cover plate 37 into the associated recess of the housing 2 or the connecting piece 4. Preferably, the connecting piece 4 is pressed onto the base body 3 by the inserted cover plate 37, so that the gap between the connecting piece 4 and the base body 3 is reduced to a minimum.

[0179] In a subsequent assembly step, the finger carrier assembly is placed onto the housing 2 and the drive 11 or the lever is inserted.

[0180] However, it is also possible that the finger support structure unit or a part thereof, in particular the bottom of the finger support structure unit, and / or the connecting element 4 form a part of the assembly component 15 and / or are fastened to the assembly component 15 before the assembly component 15 is assembled or introduced into the base body 3.

[0181] Subsequently, the operating button 38 , which is preferably designed in two parts and consists of an operating button main body 39 and an operating button insert 40 , is assembled.

[0182] The operating button base 39 is constructed in a tubular shape and forms a cavity, which is divided into an upper area and a lower area by a stopper 41. The stopper 41 is constructed as a radial protrusion, wherein an opening is arranged in the center of the stopper 41. The lower area of ​​the operating button base 39 can be arranged to surround the drive device 11 or the stroke rod. Here, the stopper 41 of the operating button base 39 forms a shape fit with the drive device 11 or the stopper 42 of the stroke rod. The stopper 42 of the stroke rod is arranged before the upper end area of ​​the stroke rod, so that the upper end area of ​​the stroke rod is inserted through the stopper 41 or the opening of the operating button base 39.

[0183] The operating button insert 40 is implemented in a mushroom shape. An operating surface 43 is arranged at the upper end of the operating button insert 40 and a radial cutout 44 is arranged at the lower end. A clamping ring 45 and / or an O-ring 45 can be installed in the radial cutout 44, and the lower end of the operating button insert 40 can elastically press it inward. Below the operating surface 43 of the operating button insert 40, there is a convex portion 46 protruding radially outward.

[0184] If the operating button insert 40 is inserted into the operating button base 39, a form fit is created between the upper end region of the drive device 11 or the stroke rod and the lower end of the operating button insert 40. The arch 46 on the upper side of the operating button insert 40 forms a force coupling with the operating button base 39. This enables the fixing of the operating button insert 40 in the operating button base 39 and the fixing of the two-part operating button 38 and the drive device 11 or the stroke rod.

[0185] The various aspects of the invention described above can be implemented independently of one another, but can also be implemented and advantageously in any combination.

[0186] Reference numerals list

[0187] 1 The lower end of the pipetting device 20A 20

[0188] 2 housing 21 stop element

[0189] 3 The first section of the base body 22 21

[0190] 4 The second section of the connecting member 23 21

[0191] 5 The first stopper of the cavity 24 21 / 22

[0192] 6 The second stopper of the inner side 25 21 / 23

[0193] 7 First guide profile of outer side 26 17

[0194] 8 Second guide profile of opening 27 17

[0195] 9 Third guide contour of the latching element 28 17

[0196] 10 Transverse section of protrusion 29 28

[0197] 11 First guide point of the drive device 30 26

[0198] 12 Second guide point of volume display 31 26

[0199] 13 The first mating surface of the setting device 32 26

[0200] 14 Adjust the second mating surface of the display 33 26

[0201] 14A The third mating surface of the engaging spring 34 26

[0202] 15Assembly components 35Fasteners

[0203] 16 first guide device 36 volume adjustment sleeve

[0204] 17 second guide device 37 cover plate

[0205] 18 16 Channel 37A Window

[0206] 19 17 Channel 38 Operation Button

[0207] 20 guide rail 39 operating button base

[0208] 40 Operation button inserts

[0209] 41 stopper

[0210] 42 stopper

[0211] 43 Operation surface

[0212] 44 incision

[0213] 45 Clamping ring / O-ring

[0214] 46 Arch

[0215] A 15 longitudinal axis

[0216] L 1 / 3 longitudinal axis

[0217] W1 first angle

[0218] W2 second angle.

Claims

1. A pipetting device (1) for receiving and releasing a fluid volume, the pipetting device comprising: a housing (2) having a base body (3) which encloses a cavity (5) and has an inner side (6), an outer side (7) and an opening (8) which define the cavity (5), and - an assembly (15) comprising a plurality of components of the pipetting device (1), in, The assembly component (15) can be introduced into the cavity (5) of the base body (3) through the opening (8) of the base body (3) for assembly, and in the assembled state the assembly component (15) is arranged in the cavity (5) of the base body (3) and is fastened to the base body (3) in a detachable manner, Wherein, a first guiding device (16) is formed on the inner side (6) of the base body (3), A second guide device (17) is formed on the assembly component (15), and the first guide device (16) is at least temporarily engaged with the second guide device (17) during assembly of the assembly component (15) and in the assembled state of the assembly component (15).

2. The liquid transfer device according to claim 1, wherein: The liquid transfer device (1) comprises: a displacement device, in particular a piston-cylinder device, which has - displacement parts, in particular pistons, and - displacement housing, in particular a cylinder block; - a drive device (11) for moving the displacement member in the displacement housing, - wherein the movement of the displacement member is limited by an upper stop, a lower stop and at least one matching stop of the drive device and / or the displacement member, thereby defining the stroke of the displacement member; - a volume display (12) for displaying a pipetting volume matched to or associated with the stroke of the displacement element; - a setting device (13) which is designed to change the stroke of the displacement member, in particular to change the position of the upper stop, and - an adjustment display (14) for displaying a calibrated value of the stroke of the displacement member (12), Therein, the assembly component (15) comprises at least one component of the volume display (12), and / or at least one component of the setting device (13), and / or at least one component of the adjustment display (14).

3. The liquid transfer device according to claim 1 or 2, wherein: The first guide device (16) and the second guide device (17) define an introduction path for introducing the assembly component (15) into the base body (3), thereby blocking or preventing the assembly component (15) from being introduced along a path different from the defined introduction path, and / or enabling the assembly component (15) to be introduced into the base body (3) only along the defined introduction path.

4. A pipetting device according to any one of the preceding claims, wherein The first guide device (16) has a guide rail (20) for guiding the assembly component (15) when the assembly component (15) is assembled. Preferably, the guide rail is elongated.

5. The liquid transfer device according to claim 4, wherein: The guide rail (20) forms a bulge on the inner side (6) of the base body (3).

6. The liquid transfer device according to claim 4 or 5, wherein: The first guiding device (16) has two guide rails (20) for guiding the assembly component (15) when assembling the assembly component (15), preferably, the two guide rails have the same structure, wherein the guide rails (20) are arranged opposite to each other.

7. A pipetting device according to any one of the preceding claims, wherein The first guide device (16) has a stop element (21), which is preferably designed to be angled.

8. The liquid transfer device according to claim 7, wherein: The stop element (21) forms the center of rotation of the assembly component (15), or wherein: The stop element (21) forms an axis of rotation of the assembly (15), preferably, the axis of rotation is horizontal.

9. The liquid transfer device according to claim 7 or 8, wherein: The first guide device (16) has two stop elements (21), preferably the two stop elements are identical in structure, wherein the stop elements (21) are arranged opposite to each other.

10. A pipetting device according to any one of the preceding claims, wherein The first guide device (16) forms a channel (18), into which at least a portion of the second guide device (17) can be introduced, in particular, into which a first guide profile (26) can be introduced, preferably, wherein the channel (18) is formed between the guide rail (20) and the stop element (21).

11. A pipetting device according to any one of the preceding claims, wherein The second guide device (17) forms a channel (19) into which at least a portion of the first guide device (16) can be introduced, in particular the guide rail (20) can be introduced, preferably wherein the channel (19) is formed between a first guide profile (26) and a second guide profile (26).

12. A pipetting device according to any one of the preceding claims, wherein The second guide device (17) has at least one first guide profile (26), at least one second guide profile (27) and at least one third guide profile (28), and the at least one first guide profile, the at least one second guide profile and the at least one third guide profile are used to guide the assembly component (15) along the guide rail (20) of the first guide device (16).

13. The liquid transfer device according to claim 12, wherein: The first guide profile (26) is spaced apart from the second guide profile (27) so as to pass the guide rail (20) between the first guide profile (26) and the second guide profile (27), preferably wherein the second guide profile (27) forms a first area for the guide rail (20) to abut during assembly, and the first guide profile (26) forms a second area for the guide rail (20) to abut during assembly.

14. The liquid transfer device according to claim 12 or 13, wherein: The second guide profile (27) is connected to the third guide profile (28) or is formed as one piece.

15. The pipetting device according to any one of claims 7 or 8 or 9, and 12 to 14, wherein: The stop element (21) forms a first stop portion (24) for the second guide device (17), in particular, the stop element (21) forms a first stop portion (24) for the first guide profile (26), preferably, wherein the first guide profile (26) can be placed on the first stop portion (24), in particular, wherein the first stop portion (24) limits the introduction path of the assembly component (15).

16. The pipetting device according to any one of claims 7 or 8 or 9, and 12 to 15, wherein: The stop element (21) forms a second stop (25) for the second guide device (17), in particular, the stop element (21) forms a second stop (25) for the first guide profile (26), preferably, wherein the first guide profile (26) can be pivoted against the second stop (25).

17. A pipetting device according to any one of claims 7 or 8 or 9, and 12 to 16, wherein: When the assembly component (15) is in an assembled state, the stop element (21) forms a shape fit with the second guide device (17), in particular, the stop element (21) forms a shape fit with the first guide profile (26), Preferably, the form fit blocks the relative movement between the stop element (21) and the second guide device (17) in the axial direction and / or in the circumferential direction, and thereby blocks the relative movement between the assembly component (15) and the base body (3) in the axial direction and / or in the circumferential direction, Preferably, the first guide contour (26) surrounds the stop element (21).

18. A pipetting device according to any one of claims 7 or 8 or 9, and 12 to 17, wherein: When the assembly component (15) is in an assembled state, the first guide contour (26) abuts against the first stop portion (24) and the second stop portion (25).

19. A pipetting device according to any one of claims 4 or 5 or 6, and 7 to 18, wherein: When the assembly component (15) is in an assembled state, the guide rail (20) forms a shape fit with the second guide device (17), in particular, wherein the guide rail (20) at least partially rests on the first guide profile (26), the second guide profile (27) and the third guide profile (28), whereby, preferably, the assembly component (15) is fixed in the base body (3).

20. A pipetting device according to any one of the preceding claims, wherein The assembly component (15) is connected to the housing (2), in particular to the connecting piece (4) of the housing (2), by a fastener (Z) in the assembled state. In particular, the fastener (Z) is a screw, a pin or a rivet, preferably, wherein the fastener (Z) blocks the relative movement between the assembly component (15) and the base body (3) in the radial direction and / or in the axial direction and / or in the circumferential direction.

21. A method for assembling a pipetting device (1), the method comprising the following steps: a) providing a pipetting device (1) according to any one of claims 1 to 20, b) introducing the assembly component (15) into the cavity (5) of the base body (3) through the opening of the base body (3), c) engaging the second guide means (17) with the first guide means (16), d) moving the assembly (15) along the first guide (16) until the second guide (17) abuts against a stop (24) of the first guide (16), and e) rotating the assembly (15) around a rotation axis to a final position of the assembly (15), preferably, the rotation axis is horizontal.

Images