A pipette tip sorting and transferring device

Abstract

The invention discloses a device for sorting and transferring pipette tips, comprising a sorting device and a transfer device. The sorting device comprises a guide plate with a guide groove, a collecting plate with a collecting groove and a bracket. The head end of the collecting plate is connected to the tail end of the guide plate and the two are arranged obliquely. The transfer device comprises an annular outer frame, a gun taking device and a gun pushing device. The gun taking device comprises a fixed guide plate, an active guide plate and a driven guide plate slidably connected to the annular outer frame, and a downwardly extending taking needle is arranged on each of the guide plates. The gun pushing device comprises a push rod and a blocking plate slidably connected to the annular outer frame. When in use, scattered pipette tips are placed on the guide plate, and the tips slide toward the collecting plate in an orderly manner along the guide groove and are neatly arranged in the collecting groove on the collecting plate. Then, the taking needle below the transfer device is inserted into the pipette tip to transfer the pipette tip to a special box body. The annular outer frame is fixed, and the push rod is pressed down. The blocking plate scrapes the pipette tip on the taking needle to complete the transfer.

Description

Technical Field

[0001] The invention relates to the technical field of transfer of pipette tips, in particular to a pipette tip sorting and transfer device. Background Art

[0002] Pipette tips are widely used in biological, medical, and chemical experiments to transfer solution reagents quantitatively, and they play an important role in controlling the dosage of experimental solutions. In practice, newly purchased pipette tips are placed in packaging bags in a disordered manner. For ease of use, the tips need to be placed neatly and orderly in a special box. This part of the work is currently basically done manually, and the pipette tips need to be inserted into the box one by one. To avoid contamination during pipetting, the pipette tips must be discarded after a suction and discharge operation. Therefore, in experiments that require multiple pipetting operations, the use of pipette tips becomes very considerable, increasing the workload of manual sorting and transfer of pipette tips.

[0003] Therefore, how to solve the problem in the prior art that pipette tips need to be manually sorted and transferred has become a technical problem that technical personnel in the field urgently need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a device for sorting and transferring pipette tips, so as to solve the problem in the prior art that pipette tips need to be sorted and transferred manually.

[0005] The various technical effects that can be produced by the preferred technical solutions among the various technical solutions provided by the present invention are described in detail below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a pipette tip sorting and transferring device, comprising:

[0008] A sorting device, comprising a guide plate, a collecting plate and a bracket, wherein the upper surface of the guide plate is provided with a plurality of guide grooves extending along the front-to-back direction of the guide plate, the head end of the collecting plate is connected to the bottom of the tail end of the guide plate, the collecting plate is provided with a plurality of collecting grooves vertically penetrating the collecting plate, the collecting grooves extend along the front-to-back direction of the collecting plate, each collecting groove corresponds to one guide groove, the width of the collecting groove is greater than the outer diameter of the root of the pipette tip and smaller than the diameter of the tail end of the pipette tip, the bracket is provided at the guide plate and the bottom of the collecting plate, and the height of the bracket gradually decreases from the head end of the guide plate to the tail end of the collecting plate;

[0009] The transfer device comprises an annular outer frame, a gun taking device and a gun pushing device arranged on the inner side of the annular outer frame, the gun taking device comprises a fixed guide piece fixedly connected to the inner side of the annular outer frame, an active guide piece arranged parallel to the fixed guide piece, and a plurality of driven guide pieces arranged between the active guide piece and the fixed guide piece, the active guide piece and the driven guide piece are both slidably connected to the annular outer frame, and the sliding direction is along the direction perpendicular to the fixed guide piece, the fixed guide piece, the driven guide piece and the active guide piece are all provided with a plurality of through holes vertically penetrating the guide pieces, each of the through holes is provided with a downwardly extending taking needle, and the gun pushing device comprises a fixed guide piece fixedly connected to the inner side of the annular outer frame, an active guide piece arranged parallel to the fixed guide piece, and a plurality of driven guide pieces arranged between the active guide piece and the fixed guide piece, the active guide piece and the driven guide piece are both slidably connected to the annular outer frame, and the sliding direction is along the direction perpendicular to the fixed guide piece, the fixed guide piece, the driven guide piece and the active guide piece are all provided with a plurality of through holes vertically penetrating the guide pieces, and a downwardly extending taking needle is provided in each of the through holes, The device includes a baffle and a push rod, the push rod is slidably connected to the annular outer frame in the vertical direction, the baffle is arranged below the fixed guide plate and connected to the bottom end of the push rod, and a plurality of strip through grooves extending in a direction perpendicular to the fixed guide plate are evenly arranged on the baffle along the extension direction of the fixed guide plate, each row of the needle retrieval needles corresponds to one strip through groove, the width of the strip through groove is larger than the outer diameter of the needle retrieval needle and smaller than the tail end diameter of the pipette tip, and a maximum distance limiting device and a minimum distance limiting device are arranged between the active guide plate and the driven guide plate, between multiple driven guide plates, and between the driven guide plate and the fixed guide plate.

[0010] Preferably, the maximum distance limiting device includes a limiting screw and a limiting ring, and the fixed guide plate, the multiple driven guide plates and the active guide plate are provided with the limiting screws at both ends along their own length direction, and a limiting ring is sleeved on the outer side of each two adjacent limiting screws, and the length of each limiting ring is greater than the sum of the diameters of the two limiting screws.

[0011] Preferably, the minimum distance limiting device is a detachable spacer needle, and the spacer needle is provided between the fixed guide plate and the adjacent driven guide plate, between two driven guide plates, and between the active guide plate and the driven guide plate.

[0012] Preferably, blocking and limiting structures are provided at the top and middle of the needle removal needle, and the distance between the two blocking and limiting structures is greater than the height of the guide piece.

[0013] Preferably, the push rods include two pairs, and a handle is provided between the top ends of each pair of push rods.

[0014] Preferably, sliding rods are provided at both ends of the guide plate in the annular outer frame along the length direction, and the sliding rods extend in a direction perpendicular to the guide plate. Sliding holes are provided at both ends of the guide plate in the length direction, and the sliding rods are inserted into the sliding holes and the guide plate can slide along the sliding rods.

[0015] Preferably, the bottom of the removal needle is conical.

[0016] Preferably, wrenches for pulling the active guide vane to slide are provided at both ends of the active guide vane along the length direction.

[0017] Preferably, baffles extending upward are provided on the left and right sides of the guide plate, and the height of the baffles is greater than the diameter of the tail end of the pipette tip.

[0018] Preferably, the bracket includes a first support rod located on the left and right sides of the guide plate and a second support rod located on the left and right sides of the collecting plate, and the length of the first support rod is greater than the length of the second support rod.

[0019] The present invention provides a pipette tip sorting and transferring device, which has the following beneficial effects:

[0020] The present invention provides a pipette tip sorting and transferring device, comprising a sorting device and a transferring device, wherein the sorting device comprises a guide plate, a collecting plate and a bracket, wherein the upper surface of the guide plate is provided with a plurality of guide grooves extending in the front-rear direction of the guide plate; the head end of the collecting plate is connected to the bottom of the tail end of the guide plate, and the collecting plate is provided with a plurality of collecting grooves penetrating the collecting plate in a direction perpendicular to the upper surface of the collecting plate, the collecting grooves extending in the front-rear direction of the collecting plate, each collecting groove corresponding to a guide groove, the width of the collecting groove being greater than the root diameter of the pipette tip and less than the tail end diameter of the pipette tip, the bracket being provided at the bottom of the guide plate and the collecting plate, the height of the bracket gradually decreasing from the head end of the guide plate to the tail end of the collecting plate, the guide plate and the collecting plate located on the bracket, the head end height being greater than the tail end height, and being in an inclined state;The transfer device includes an annular outer frame, a gun taking device and a gun pushing device arranged on the inner side of the annular outer frame, the gun taking device includes a fixed guide piece fixedly connected to the inner side of the annular outer frame, an active guide piece arranged in parallel with the fixed guide piece, and a plurality of driven guide pieces arranged between the active guide piece and the fixed guide piece, the active guide piece and the driven guide piece are both slidably connected to the annular outer frame, and the sliding direction is along a direction perpendicular to the fixed guide piece, the fixed guide piece, the driven guide piece and the active guide piece are all provided with a plurality of through holes along the vertical direction, and a downwardly extending taking needle is provided in the through hole, the gun pushing device includes a baffle and a push rod, the push rod is slidably connected to the annular outer frame in the vertical direction, the baffle piece is located below the plurality of guide pieces and is connected to the bottom end of the push rod, and the baffle piece is along the fixed guide piece. A plurality of strip-shaped through grooves extending in a direction perpendicular to the fixed guide piece are evenly arranged in the extension direction, each row of needles corresponds to a strip-shaped through groove, the width of the strip-shaped through groove is greater than the outer diameter of the needle and smaller than the tail end diameter of the pipette tip, and a maximum distance limiting device and a minimum distance limiting device are arranged between the active guide piece and the driven guide piece, between the plurality of driven guide pieces, and between the driven guide piece and the fixed guide piece. When in use, the scattered pipette tips are placed on the guide plate, and the guide plate is slightly vibrated, the pipette tips enter the guide groove and the axial direction of the pipette tips is along the extension direction of the guide groove. Since the guide plate is arranged to be tilted downward, the pipette tips move downward along the guide groove under vibration, and after moving to the tail end of the guide groove, the pipette tips fall onto the collecting plate and fall off. The pipette tip is placed on the collecting groove of the collecting plate, and the head end of the pipette tip passes through the collecting groove downward. The diameter of the tail end of the pipette tip is larger than the width of the collecting groove. The pipette tip is placed on the collecting groove. Since the collecting plate is arranged obliquely downward, the pipette tip moves downward along the collecting groove and is arranged neatly. Then, a minimum distance limiter of appropriate size is selected according to the diameter of the pipette tip, and the active guide plate is pushed in the direction close to the fixed guide plate. When the active guide plate, the driven guide plate and the fixed guide plate are all in contact with the minimum distance limiter, the pushing is stopped. At this time, each needle corresponds to the pipette tip on the collecting plate, and the transfer device is moved downward to insert the needle into the pipette tip. The outer wall of the needle is supported at the tail end opening of the pipette tip. Then, the transfer device is lifted The pipette tip moves with the device. When it reaches the top of the special box for placing the pipette tip, the active guide moves away from the fixed guide. When the active guide and the driven guide move to the maximum distance defined by the maximum distance limiter, the movement stops. At this time, the bottom of the pipette tip corresponds to the placement hole position on the special box. The pipette tip is placed in the special box, and then the annular outer frame is held and the push rod is pushed downward. The baffle moves downward. Since the width of the through groove is smaller than the diameter of the tail end of the pipette tip, the baffle will scrape the pipette tip off the needle when it moves downward and drop it into the special box, completing the transfer of the pipette tip. This replaces the problem of manually placing the pipette tips one by one, greatly improving the transfer efficiency. ;

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 is a structural diagram of a sorting device shown in an embodiment of the present invention;

[0024] Figure 2 is a structural diagram of a transfer device shown in an embodiment of the present invention;

[0025] Figure 3 is a structural diagram of an annular outer frame shown in an embodiment of the present invention;

[0026] Figure 4 is a structural diagram of an active guide vane according to an embodiment of the present invention;

[0027] Figure 5 1 is a structural diagram of a driven guide vane according to an embodiment of the present invention;

[0028] Figure 6 is a structural diagram of a fixed guide vane shown in an embodiment of the present invention;

[0029] Figure 7 is a structural diagram of a baffle according to an embodiment of the present invention;

[0030] Figure 8 is a needle removal structure diagram shown in an embodiment of the present invention;

[0031] Fig. 9 1 is a diagram of a needle spacing structure shown in an embodiment of the present invention;

[0032] Fig.10 is a structural diagram of a pipette tip according to an embodiment of the present invention;

[0033] Fig.11 is a diagram showing a process of a transfer device taking a gun from a sorting device according to an embodiment of the present invention;

[0034] Fig.12 is a diagram showing a process of transferring a pipette tip by a transfer device according to an embodiment of the present invention;

[0035] Fig.13 This is a diagram showing the process of placing a pipette tip into a dedicated box by a transfer device according to an embodiment of the present invention;

[0036] Fig.14 It is a schematic diagram showing that the pipette tip is located in a dedicated box body according to an embodiment of the present invention.

[0037] In the figure: 1. guide plate; 2. collecting plate; 3. guide groove; 4. collecting groove; 5. annular outer frame; 6. fixed guide plate; 7. active guide plate; 8. driven guide plate; 9. through hole; 10. needle removal; 11. baffle plate; 12. push rod; 13. strip through groove; 14. limit screw; 15. limit ring; 16. spacer needle; 17. handle; 18. slide rod; 19. slide hole; 20. wrench; 21. baffle plate; 22. first support rod; 23. second support rod; 24. annular groove. DETAILED DESCRIPTION

[0038] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] The following is an explanation of the embodiments with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the invention described in the claims. In addition, the entire contents of the configurations shown in the following embodiments are not limited to the solutions required as the invention described in the claims.

[0040] See also Figure 1 to Figure 14The present invention provides a pipette tip sorting and transferring device, including a sorting device and a transferring device. The sorting device includes a guide plate 1, a collecting plate 2 and a bracket. The upper surface of the guide plate 1 is provided with a plurality of guide grooves 3 extending along the front-to-back direction of the guide plate 1. The plurality of guide grooves 3 are evenly arranged along the left-to-right direction of the guide plate 1. The width of the guide groove 3 can be greater than the tail end diameter of the pipette tip. The head end of the collecting plate 2 is connected to the bottom of the tail end of the guide plate 1. The collecting plate 2 and the guide plate 1 can be arranged in parallel. The collecting plate 2 is provided with a plurality of collecting grooves 4 penetrating the collecting plate 2 in a direction perpendicular to the upper surface of the collecting plate 2. The collecting grooves 4 extend along the front-to-back direction of the collecting plate 2 and are evenly distributed along the left-to-right direction of the collecting plate 2. Each collecting groove 4 corresponds to a guide groove 3. The width of the collecting groove 4 is greater than the root of the pipette tip and smaller than the diameter of the tail end of the pipette tip. The bracket is arranged at the bottom of the guide plate 1 and the collecting plate 2. The height of the bracket gradually decreases from the head end of the guide plate 1 to the tail end of the collecting plate 2. The guide plate 1 and the collecting plate 2 located on the bracket have a head end height greater than the tail end height and are in an inclined state; the transfer device includes an annular outer frame 5, a gun taking device and a gun pushing device arranged on the inner side of the annular outer frame 5, the interior of the annular outer frame 5 can be a rectangular through groove, the gun taking device is arranged in the rectangular through groove, the gun taking device includes a fixed guide piece 6 fixedly connected to the inner side of the annular outer frame 5, an active guide piece 7 arranged parallel to the fixed guide piece 6, and a plurality of driven guide pieces 8 arranged between the active guide piece 7 and the fixed guide piece 6, the following active guide piece 7, fixed guide piece 6, driven guide piece 8 The plates 8 are collectively referred to as guide plates. The active guide plate 7 and the driven guide plate 8 are both slidably connected to the annular outer frame 5, and the sliding direction is along the direction perpendicular to the fixed guide plate 6. The fixed guide plate 6, the driven guide plate 8 and the active guide plate 7 are all provided with a plurality of through holes 9 along the vertical direction. A downwardly extending needle 10 is provided in the through hole 9. The gun pushing device includes a baffle plate 11 and a push rod 12. The push rod 12 is slidably connected to the annular outer frame 5 along the vertical direction. The baffle plate 11 is located below the plurality of guide plates and is connected to the bottom end of the push rod 12. A plurality of strip through grooves 13 extending in a direction perpendicular to the fixed guide plate 6 are evenly provided on the baffle plate 11 along the extension direction of the fixed guide plate 6. Each row of needles 10 corresponds to a strip through groove 13, and the width of the strip through groove 13 is greater than the outer diameter of the needle 10 and smaller than the pipette tip. The tail end diameter of the pipette is provided between the active guide piece 7 and the driven guide piece 8, between multiple driven guide pieces 8, and between the driven guide piece 8 and the fixed guide piece 6. When in use, the scattered pipette tips are placed on the guide plate 1, and the guide plate 1 is slightly vibrated. The pipette tips enter the guide groove and the axial direction of the pipette tips is along the extension direction of the guide groove. Since the guide plate 1 is tilted downward, the pipette tips move downward along the guide groove under vibration. After moving to the tail end of the guide groove, the pipette tips fall onto the collecting plate 2 and fall into the collecting groove 4 of the collecting plate 2. The head end of the pipette tips passes through the collecting groove 4 downward. The tail end diameter of the pipette tips is greater than the width of the collecting groove 4. The pipette tips are mounted on the collecting groove 4. Since the collecting plate 2 is tilted downward,The pipette tips move downward along the collecting groove 4 and are arranged neatly. Then, a minimum distance limiting device of appropriate size is selected according to the diameter of the pipette tips, and the active guide plate 7 is pushed in the direction close to the fixed guide plate 6. When the active guide plate 7, the driven guide plate 8, and the fixed guide plate 6 are all in contact with the minimum distance limiting device, the pushing is stopped. At this time, each needle 10 corresponds to the pipette tips on the collecting plate 2 respectively, and the transfer device is moved downward to insert the needle 10 into the pipette tips. The outer wall of the needle 10 is supported at the tail end opening of the pipette tips. Then the transfer device is lifted, and the pipette tips move together with the device. When it reaches the top of the special box body for placing the pipette tips, When the active guide piece 7 is moved away from the fixed guide piece 6, the active guide piece 7 and the driven guide piece 8 stop moving when they move to the maximum distance defined by the maximum distance limit device. At this time, the bottom end of the pipette tip corresponds to the placement hole position on the special box body. The pipette tip is placed in the special box body, and then the annular outer frame 5 is held, and the push rod 12 is pushed downward, and the baffle 11 moves downward. Since the width of the through groove is smaller than the diameter of the tail end of the pipette tip, when the baffle 11 moves downward, the pipette tip will be scraped off the needle 10 and fall into the special box body, completing the transfer of the pipette tip, replacing the problem of manually placing the pipette tips one by one, and greatly improving the transfer efficiency.

[0041] In implementation, the cross-section of the above-mentioned rectangular through groove can be a rectangle, or it can also be a rounded rectangle, etc. The above-mentioned fixed guide vane 6, active guide vane 7 and driven guide vane 8 can all extend along the length direction of the rectangular through groove and be evenly arranged along the width direction of the rectangular through groove. For example, from left to right, they can be a fixed guide vane 6, multiple driven guide vanes 8 and active guide vane 7 in sequence. The fixed guide vane 6 is fixedly connected to the inner wall of the annular outer frame 5, which can be a bolt connection. Multiple driven guide vanes 8 and active guide vanes 7 are all slidably connected to the annular outer frame 5, and the sliding direction can be along a direction perpendicular to the fixed guide vane 6, for example, along the width direction of the rectangular through groove.

[0042] Preferably, the above-mentioned minimum distance limiting device can be a spacer needle 16, and the spacer needle 16 can be a U-shaped structure. The opening of the spacer needle 16 is downwardly across the driven guide piece 8, and the top of the spacer needle 16 is detachably connected to the top of the driven guide piece 8. The two side parts of the spacer needle 16 are inserted into the two sides of the corresponding guide piece. When the active guide piece 7 is moved in the direction close to the fixed guide piece 6, the active guide piece 7 contacts the spacer needle 16 on the adjacent driven guide piece 8, and drives the adjacent driven guide piece 8 to move in the direction close to the active guide piece 7, and so on, until The spacer needle 16 on the driven guide piece 8 adjacent to the fixed guide piece 6 stops moving after contacting the fixed guide piece 6. At this time, the lateral distance between each guide piece is the minimum distance. The cross-section of the spacer needle 16 can be circular, and spacer needles 16 of different diameters can be used to adjust the minimum distance between each guide piece. For example, a fixed groove can be set at the top of the driven guide piece 8, and the top of the spacer needle 16 is fixed in the fixed groove, or a round hole can be set at the top of the guide piece, and a downward protrusion is set at the bottom of the top of the spacer needle 16, and the protrusion is snapped into the round hole to achieve fixation. The lateral distance between two adjacent collecting grooves 4 on the collecting plate 2 is constant. Therefore, the lateral distance between two adjacent pipette tips is constant. However, due to the different diameters of pipette tips of different specifications, after the pipette tips are arranged on the collecting plate 2, the distance between two adjacent pipette tips along the collecting groove 4 direction will vary due to different specifications. The distance between two adjacent collecting grooves 4 on the collecting plate 2 is equal to the distance between two adjacent through holes 9 on the fixed guide piece 6 or one of the driven guide pieces 8 or the active guide piece 7. When in use, the fixed guide piece 6 It is perpendicular to the collecting tank 4, and then a spacer needle 16 of appropriate diameter is selected according to the diameter of the pipette tip, and the active guide plate 7 is moved toward the fixed guide plate 6. The active guide plate 7 and the driven guide plate 8 are moved toward the fixed guide plate 6 in turn. When the active guide plate 7, the driven guide plate 8 and the active guide plate 7 are all in contact with the spacer needle 16, the distance between two adjacent retrieval needles 10 on different guide plates is equal to the longitudinal distance between the two pipette tips. At this time, multiple retrieval needles 10 are aligned with the pipette tip, and the retrieval needles 10 can be pressed down to fix the pipette tip.

[0043] In practice, the above-mentioned maximum distance limiting device can be a linkage device. When the active guide piece 7 is pulled in the direction away from the fixed guide piece 6, the driven guide piece 8 also follows the active guide piece 7 to move in the direction away from the fixed guide piece 6. When it moves to a certain distance, the device limits its continued movement. In this way, the maximum distance between the driven guide pieces 8, between the driven guide piece 8 and the active guide piece 7, and between the driven guide piece 8 and the fixed guide piece 6 can be adjusted, so that the needle 10 can be aligned with the hole on the special box, and the pipette tip can be accurately placed in the special box. For example, the number of the above-mentioned driven guide pieces 8 can be six, and the above-mentioned maximum distance limiting device includes a limiting screw 14 and a limiting ring 15. Each guide piece is provided with a limiting screw 14 at the top of both ends along its length direction in the vertical direction. The bottom of the limiting screw 14 extends into the corresponding guide piece, and the top extends outward. The above-mentioned limiting ring 15 can include multiple limiting rings 15, and the multiple limiting rings 15 are arranged in an upper and lower staggered manner. For example, the fixed guide piece 6 can be a guide piece No. 1, and the direction of the driven guide piece 8 from close to the fixed guide piece 6 to away from the fixed guide piece 6 can be Guide piece No. 2, guide piece No. 3, guide piece No. 4, guide piece No. 5, guide piece No. 6, guide piece No. 7, the active guide piece 7 can be guide piece No. 8, the limiting ring 15 is provided with two layers, namely the bottom layer close to the guide piece and the top layer above the bottom layer, one implementation mode is that the outer side of the limiting screw 14 on the guide piece No. 1 and guide piece No. 2, guide piece No. 3 and guide piece No. 4, guide piece No. 5 and guide piece No. 6, guide piece No. 7 and guide piece No. 8 of the bottom layer is respectively provided with a limiting ring 15, and the guide piece No. 2 and guide piece No. 3, guide piece No. 4 and guide piece No. 5, guide piece No. 6 and guide piece No. 7 of the top layer is provided with a limiting ring 15. A limiting ring 15 is sleeved on the outside of each limiting screw 14 on the plate. The limiting ring 15 can be a waist-shaped ring. The length of the limiting ring 15 is greater than the sum of the diameters of the two limiting screws 14. When the active guide plate 7 is moved away from the fixed guide plate 6, the limiting ring 15 drives the driven guide plate 8 to move away from the fixed guide plate 6 in turn, and stops moving when it moves to the maximum length of each limiting ring 15. At this time, each retrieval needle 10 is aligned with the placement hole on the special box, and the pipette tip on the retrieval needle 10 can be accurately placed in the placement hole.

[0044] During implementation, the top and middle parts of the above-mentioned needle 10 are provided with blocking and limiting structures. When the needle 10 is not in contact with the pipette tip, the needle 10 slides downward along the through hole 9 under the action of its own gravity, and stops when it slides to the upper blocking and limiting structure in contact with the guide plate. When the needle 10 is in contact with the pipette tip, the needle 10 is pushed upward, and stops when it slides to the lower blocking and limiting structure in contact with the guide plate. The blocking and limiting structure can be an inwardly recessed annular limiting groove and an elastic retaining ring arranged in the annular limiting groove. The top end of the needle 10 passes through the top of the through hole 9 upward, and the outer diameter of the elastic retaining ring is larger than the inner diameter of the through hole 9. The diameter can prevent the needle 10 from falling from the through hole 9. The annular groove 24 in the middle of the needle 10 passes downward through the bottom of the through hole 9. The distance between the two annular grooves 24 is greater than the height of the guide plate, so that when the needle 10 contacts the pipette tip, it can float within a certain range. When the arranged pipette tips are inconsistent in height, it can ensure that each needle 10 can be inserted into the pipette tip. When in use, the needle 10 is aligned with the arranged pipette tips, and the annular outer frame 5 is moved downward. After each needle 10 contacts the pipette tip, press the top of the needle 10 downward to insert the bottom of the needle 10 into the pipette tip.

[0045] In practice, the above-mentioned push rods 12 can include two pairs, and the two push rods 12 of each pair of push rods 12 can be respectively arranged on the two side edges of the annular outer frame 5 in a direction perpendicular to the guide plate, and the two pairs of push rods 12 are symmetrically arranged on both sides of the annular outer frame 5 along the length direction. A handle 17 is arranged between each pair of push rods 12, and the handle 17 can be a connecting rod, and the two ends of the connecting rod are respectively connected to the top of the push rod 12. When the pipette tip is transferred to the special box, the annular outer frame 5 can be held still, and the handle 17 is pressed downward. The push rod 12 drives the baffle 11 to move downward, scrapes the pipette tip on the needle 10, and drops it into the special box to complete the transfer operation.

[0046] The sliding connection between the guide plate and the annular outer frame 5 can be achieved by using a slide rod 18. A slide rod 18 is arranged at each end of the guide plate along the length direction in the rectangular through groove. The slide rod 18 extends in a direction perpendicular to the guide plate. Slide holes 19 are arranged at positions corresponding to the guide plate and the slide rod 18. The slide rod 18 is inserted into each slide hole 19 and connected to the annular outer frame 5 at both ends. The guide plate can slide along the slide rod 18.

[0047] The top of the above-mentioned retrieval needle 10 can be cylindrical and the bottom can be conical, so that the retrieval needle 10 can stably fix the pipette tip after being inserted into the pipette tip to prevent the pipette tip from deflecting.

[0048] Furthermore, wrenches 20 for pulling the active guide piece 7 to slide can be provided at both ends of the active guide piece 7 along the length direction. The wrench 20 can be a rectangular protrusion, and the wrench 20 protrudes from the end surface of the driven guide piece 8 along the length direction. With such a configuration, when the active guide piece 7 is moved, the wrench 20 can be used as a fulcrum to facilitate movement.

[0049] The cross-section of the above-mentioned guide groove 3 can be rectangular or arc-shaped. The preferred embodiment is arc-shaped. The guide groove 3 starts from the head end of the guide plate 1 and extends to the tail end of the guide plate 1. The above-mentioned collecting groove 4 can be a waist-shaped groove, with semicircular grooves at both ends of the head and tail ends and a rectangular groove in the middle.

[0050] In order to prevent messy pipette tips from falling from the left and right sides when placed on the guide plate 1, an upwardly extending baffle 21 can be set on the left and right sides of the guide plate 1. The height of the baffle 21 can be greater than the tail end diameter of the pipette tip. A first bolt hole can be set at the front and rear ends of the baffle 21. The first bolt hole can be perpendicular to the upper surface of the guide plate 1. A second bolt hole is set on the left and right sides of the upper surface of the guide plate 1 at positions corresponding to the first bolt hole. After aligning the first bolt hole with the second bolt hole, the baffle 21 is fixedly connected to the guide plate 1 by bolts.

[0051] The above-mentioned bracket may include a first support rod 22 arranged on the left and right sides of the guide plate 1 and a second support rod 23 located on the left and right sides of the collecting plate 2. The first support rod 22 is located at the bottom of the guide plate 1, and the second support rod 23 is located at the bottom of the collecting plate 2. In order to make the guide plate 1 and the collecting plate 2 inclined, the length of the first support rod 22 is greater than the length of the second support rod 23. A first mounting hole penetrating the guide plate 1 is provided on the left and right sides of the guide plate 1. After the top end of the first support rod 22 passes through the first mounting hole, the top end of the first support rod 22 is connected to the guide plate 1 by a first nut. Similarly, a second mounting hole penetrating the guide plate 1 is provided on the left and right sides of the collecting plate 2. After the top end of the second support rod 23 passes through the second mounting hole, the top end of the second support rod 23 is connected to the collecting plate 2 by a second nut.

[0052] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A pipette tip sorting and transfer device, characterized in that: include: A sorting device comprises a guide plate (1), a collecting plate (2) and a bracket, wherein the upper surface of the guide plate (1) is provided with a plurality of guide grooves (3) extending along the front-rear direction of the guide plate (1), the head end of the collecting plate (2) is connected to the bottom of the tail end of the guide plate (1), the collecting plate (2) is provided with a plurality of collecting grooves (4) vertically penetrating the collecting plate (2), the collecting grooves (4) extending along the front-rear direction of the collecting plate (2), each collecting groove (4) corresponding to one guide groove (3), the width of the collecting groove (4) being greater than the outer diameter of the root of the pipette tip and smaller than the diameter of the tail end of the pipette tip, the bracket being arranged at the bottom of the guide plate (1) and the collecting plate (2), and the height of the bracket gradually decreasing from the head end of the guide plate (1) to the tail end of the collecting plate (2); The transfer device comprises an annular outer frame (5), a gun taking device and a gun pushing device arranged on the inner side of the annular outer frame (5), the gun taking device comprises a fixed guide piece (6) fixedly connected to the inner side of the annular outer frame (5), an active guide piece (7) arranged parallel to the fixed guide piece (6), and a plurality of driven guide pieces (8) arranged between the active guide piece (7) and the fixed guide piece (6), the active guide piece (7) and the driven guide piece (8) are both slidably connected to the annular outer frame (5), and the sliding direction is along the direction perpendicular to the fixed guide piece (6), the fixed guide piece (6), the driven guide piece (8), and the active guide piece (7) are all provided with a plurality of vertical through holes (9), and each of the through holes (9) is provided with a downwardly extending taking needle (10), and the gun pushing device comprises a blocking piece (11 ) and a push rod (12), the push rod (12) is slidably connected to the annular outer frame (5) in a vertical direction, the baffle (11) is arranged below the fixed guide plate (6) and connected to the bottom end of the push rod (12), a plurality of strip-shaped through grooves (13) extending in a direction perpendicular to the fixed guide plate (6) are evenly arranged on the baffle (11) along the extension direction of the fixed guide plate (6), each row of the needles (10) corresponds to one strip-shaped through groove (13), the width of the strip-shaped through groove (13) is greater than the outer diameter of the needles (10) and smaller than the tail end diameter of the pipette tip, and a maximum distance limiting device and a minimum distance limiting device are arranged between the active guide plate (7) and the driven guide plate (8), between the plurality of driven guide plates (8), and between the driven guide plate (8) and the fixed guide plate (6); The bottom of the needle (10) is conical; Wrenches (20) for pulling the active guide piece (7) to slide are provided at both ends of the active guide piece (7) along the length direction.

2. The pipette tip sorting and transferring device according to claim 1, characterized in that: The maximum distance limiting device comprises a limiting screw (14) and a limiting ring (15); the fixed guide piece (6), the plurality of driven guide pieces (8) and the active guide piece (7) are provided with the limiting screws (14) at both ends along their length direction; a limiting ring (15) is sleeved on the outer side of each two adjacent limiting screws (14); and the length of each limiting ring (15) is greater than the sum of the diameters of the two limiting screws (14).

3. The pipette tip sorting and transferring device according to claim 1, characterized in that: The minimum distance limiting device is a detachable spacer needle (16), and the spacer needle (16) is arranged between the fixed guide plate (6) and the adjacent driven guide plate (8), between two driven guide plates (8), and between the active guide plate (7) and the driven guide plate (8).

4. The pipette tip sorting and transferring device according to claim 1, characterized in that: The top and middle of the needle removal needle (10) are both provided with blocking and limiting structures, and the distance between the two blocking and limiting structures is greater than the height of the guide piece.

5. The pipette tip sorting and transferring device according to claim 1, characterized in that: The push rods (12) include two pairs, and a handle (17) is provided between the top ends of each pair of push rods (12).

6. The pipette tip sorting and transferring device according to claim 1, characterized in that: Slide rods (18) are provided at both ends of the guide blade along the length direction in the annular outer frame (5), and the slide rods (18) extend in a direction perpendicular to the guide blade. Slide holes (19) are provided at both ends of the guide blade along the length direction, and the slide rods (18) are inserted into the slide holes (19) and the guide blade can slide along the slide rods (18).

7. The pipette tip sorting and transferring device according to claim 1, characterized in that: Baffles (21) extending upwards are arranged on the left and right sides of the guide plate (1), and the height of the baffles (21) is greater than the diameter of the tail end of the pipette tip.

8. The pipette tip sorting and transferring device according to claim 1, characterized in that: The bracket comprises a first support rod (22) located on the left and right sides of the guide plate (1) and a second support rod (23) located on the left and right sides of the collecting plate (2), and the length of the first support rod (22) is greater than the length of the second support rod (23).

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