Suction head withdrawing structure of cell pelleter

Abstract

The utility model discloses a cell sheet making machine suction head withdrawing structure which comprises a pipetting frame and a suction head recovery base, a plurality of installation cavities corresponding to a plurality of suction needles on the pipetting frame in a one-to-one mode are formed in the suction head recovery base, a suction head withdrawing assembly is arranged in any installation cavity, and the suction head withdrawing assembly comprises a triggering piece, a connecting piece and a suction head withdrawing piece. The connecting piece is connected with the triggering piece and the suction head withdrawing piece, and the triggering piece and the suction head withdrawing piece both extend out of the suction head recovery base; the plurality of triggering pieces correspond to the position of a suction needle fixing plate of the pipetting frame, and during the movement of the pipetting frame, the suction head fixing plate abuts against the triggering pieces and pushes the triggering pieces to move, so that the suction head withdrawing piece abuts against the suction head and pushes the suction head down from the suction needle; compared with an existing suction head withdrawing structure of the pipettor, the suction head withdrawing structure is separated from a pipetting frame where a suction needle is located, the suction head withdrawing structure is installed at the suction head recycling position, suction head withdrawing work is achieved through a mechanical structure, cost is reduced, and the mistaken touch condition is avoided.

Description

Technical Field

[0001] The utility model relates to the field of liquid transfer mechanisms, in particular to a pipette ejection head structure for a cell slicer. Background Art

[0002] The pipetting mechanism of the cell slide making machine in the prior art needs to perform multiple aspiration and discharge operations, so the pipette tip needs to be replaced multiple times. The pipette tip removal mechanism in the prior art mostly uses a driving mechanism (cylinder drive form or screw drive form) to allow the pipette tip and the pipette tip removal mechanism to move relative to each other to achieve the work of removing the pipette tip, such as the patent technology with application number 202311837491.0. This method increases the cost of the cell slide making machine. In addition, there is also the possibility of accidental touch causing the pipette tip to be removed during the pipetting process, that is, it cannot be ensured that the pipette tip removal mechanism can only work at the pipette tip recovery position. Utility Model Content

[0003] The utility model provides a suction head ejection structure for a cell slicer, which can at least solve one problem pointed out in the background technology.

[0004] A tip ejection structure for a cell slide preparation machine includes a pipette stand and a tip recovery base. The tip recovery base is provided with a plurality of mounting cavities corresponding one-to-one to a plurality of suction needles on the pipette stand. A tip ejection assembly is disposed in each mounting cavity. The tip ejection assembly includes a trigger, a connector, and a tip ejection member. The connector connects the trigger and the tip ejection member. Both the trigger and the tip ejection member extend outside the tip recovery base.

[0005] The multiple trigger members correspond to the positions of the suction needle fixing plate of the pipette rack. When the pipette rack moves, the tip fixing plate abuts against the trigger member and pushes the trigger member to move, so that the tip retracting member abuts against the tip and pushes the tip off the suction needle.

[0006] The suction head ejection component includes a support plate hinged in the installation cavity and a pressure plate installed on the support plate. A spring 1 connected to the support plate is also installed in the installation cavity.

[0007] Preferably, the pressure plate is fixedly connected to a connecting plate, the connecting plate is inserted into the supporting plate, and a second spring connected to the connecting plate is also provided in the supporting plate.

[0008] Preferably, the pressing plate is a U-shaped structure.

[0009] Preferably, one end of the connecting member is hinged to the trigger member, and the other end is hinged to the support plate, and the connecting member is located on the lower side of the support plate.

[0010] Preferably, a spring three connected to the trigger member is provided in the installation cavity.

[0011] Compared with the prior art, the beneficial effects of the present invention are: compared with the existing pipette tip ejection structure, the present invention separates the tip ejection structure from the pipette stand where the suction needle is located, and installs the tip ejection structure at the tip recovery position, and adopts a mechanical structure to realize the tip ejection work, thereby reducing costs and avoiding accidental touch. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the suction head fixing base;

[0014] Figure 3 A cross-sectional view of the suction head fixing base.

[0015] Description of reference numerals:

[0016] 1-pipette stand, 2-pipette tip recovery base, 3-suction needle, 4-suction needle fixing plate, 5-pipette tip, 6-mounting cavity, 7-trigger, 8-connecting part, 9-spring 1, 10-spring 2, 11-spring 3, 12-support plate, 13-pressing plate, 14-connecting plate. DETAILED DESCRIPTION

[0017] A specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific embodiment.

[0018] like Figures 1 to 3 As shown, an embodiment of the present invention provides a tip removal structure for a cell slide making machine, comprising a pipette stand 1 and a tip recovery base 2. The pipette stand 1 is connected to a mobile stand of the cell slide making machine, and the mobile stand can drive the pipette stand 1 to move along the X-axis, Y-axis, and Z-axis. The tip recovery base 2 is placed at the tip recovery position.

[0019] This embodiment adopts a simple pipette rack 1 structure, and places the suction head withdrawal structure on the suction head recovery base 2 located at the suction head recovery position. Compared with the prior art method of installing the suction head withdrawal structure on the pipette rack 1, the complexity of the structure on the pipette rack 1 can be reduced, thereby avoiding its influence on the pipeline of the suction needle 3. In addition, it is convenient for cleaning. The suction head withdrawal structure adopts a contact structure, which does not require the use of a cylinder or a motor, is low in cost, and does not have the problem of accidental contact. Specifically, the pipette rack 1 of this embodiment is equipped with multiple suction needles 3, and the multiple suction needles 3 are externally connected to a suction pump to complete the pipetting work;

[0020] The tip recovery base 2 of this embodiment is provided with a plurality of mounting cavities 6 corresponding one-to-one to the plurality of suction needles 3 on the pipetting rack 1. A tip ejection assembly is disposed in each mounting cavity 6. The tip ejection assembly comprises a trigger 7, a connector 8, and a tip ejection member. One end of the connector 8 is hinged to the trigger 7, and the other end is hinged to the support plate 12. The connector 8 is located on the underside of the support plate 12. Both the trigger 7 and the tip ejection member extend outside the tip recovery base 2.

[0021] The plurality of trigger members 7 correspond to the positions of the suction needle fixing plate 4 of the pipette stand 1. When the pipette stand 1 moves, the tip fixing plate abuts against the trigger member 7 and pushes the trigger member 7 to move, thereby causing the tip ejection member to abut against the suction tip 5, pushing the suction tip 5 off the suction needle 3. A spring 3 11 connected to the trigger member 7 is provided in the mounting cavity 6. After the pipette stand 1 is separated from the trigger member 7, the trigger member 7 is reset under the action of the spring 3 11. In addition, the connecting plate 14 is also reset under the action of the spring 2 10.

[0022] The suction head ejection member of this embodiment includes a support plate 12 hinged in the installation cavity 6 and a pressure plate 13 installed on the support plate 12. A spring 9 connected to the support plate 12 is also installed in the installation cavity 6. Under the action of the spring 9, the support plate 12 is kept in the state as shown in FIG. Figure 1 In the state shown, the pressing plate 13 is fixedly connected to the connecting plate 14, which is inserted into the support plate 12. The support plate 12 is also provided with a spring 10 connected to the connecting plate 14; the pressing plate 13 is designed as a U-shaped structure to facilitate the suction head to enter the pressing plate 13;

[0023] When the pipette tip 5 needs to be replaced, the pipette rack 1 moves toward the pipette tip recovery base 2 under the action of the mobile rack of the cell preparation machine until the suction needle 3 fixing plate 4 contacts multiple trigger members 7. The trigger members 7 are pushed, thereby pulling the pressure plate 13 to swing downward with the hinge point as the center, thereby pushing the pipette tip 5 off the suction needle 3 and completing the pipette tip removal work.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit and essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0025] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A cell slicer ejection tip structure, characterized in that: The device comprises a pipette stand and a tip recovery base. The tip recovery base is provided with a plurality of mounting cavities corresponding one to one with the plurality of suction needles on the pipette stand. A tip ejection assembly is disposed in each mounting cavity. The tip ejection assembly comprises a trigger, a connector, and a tip ejection member. The connector connects the trigger and the tip ejection member. Both the trigger and the tip ejection member extend outside the tip recovery base. The multiple trigger members correspond to the positions of the suction needle fixing plate of the pipette rack. When the pipette rack moves, the tip fixing plate abuts against the trigger member and pushes the trigger member to move, so that the tip retracting member abuts against the tip and pushes the tip off the suction needle.

2. A cell slicer ejection tip structure according to claim 1, characterized in that: The suction head ejection component includes a support plate hinged in the installation cavity and a pressure plate installed on the support plate. A spring 1 connected to the support plate is also installed in the installation cavity.

3. A cell slicer ejection tip structure as claimed in claim 2, characterized in that: The pressure plate is fixedly connected with a connecting plate, and the connecting plate is inserted into the supporting plate. A second spring connected to the connecting plate is also provided in the supporting plate.

4. A cell slicer ejection tip structure as claimed in claim 2, characterized in that: The pressing plate is a U-shaped structure.

5. The cell slicer ejection tip structure according to claim 2, wherein: One end of the connecting member is hinged to the trigger member, and the other end is hinged to the support plate. The connecting member is located on the lower side of the support plate.

6. A cell slicer ejection tip structure according to claim 1, characterized in that: A spring three connected to the trigger member is arranged in the installation cavity.

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