A suction head mounting buffer device

Abstract

This invention relates to a suction head mounting buffer device, comprising a mounting base, a sliding sleeve, a mounting cover, and several elastic elements. The mounting base has a stepped hole extending through it, the stepped hole comprising a first section, a second section, and a third section coaxially arranged. The sliding sleeve is disposed within the second section, one end of which extends into the first section, and the end of which is provided with a sliding disk. The outer circumferential surface of the sliding disk slides in engagement with the inner surface of the first section. The mounting cover is connected to the mounting base and has a through-hole. Several elastic elements are disposed within the first section, one end of which is connected to the stepped surface of the first section, and the other end of which is connected to the sliding disk. This invention, by incorporating elastic elements, controls the suction head mounting force in the Z-direction during suction head retrieval, effectively improving the overall working efficiency of the device. It also allows for compatibility with various suction heads due to the spring travel.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a suction tip mounting buffer device. Background Technology

[0002] In medical devices used for in vitro diagnostics, pipettes are mounted on Z-axis drive mechanisms, which press downwards in the Z-direction to pick up the pipette tip. Currently, in common medical devices, the pipette is controlled to move downwards in the Z-direction to force the tip into the pipette. Functionally, this meets the requirements, but it requires appropriate force settings and strict requirements on the tip's dimensions. Otherwise, the tip may not be picked up or may be damaged, affecting equipment efficiency. Furthermore, the compatible tips are limited and compatibility is poor. Summary of the Invention

[0003] Therefore, it is necessary to provide a pipette tip installation buffer device to address the technical problems of current pipette tip retrieval methods, which involve controlling the downward pressure in the Z-direction to hard-lock the tip. While this method meets the functional requirements, it requires appropriate force settings and strict requirements on the tip's dimensions. Otherwise, the tip may not be retrieved or may be damaged, thus affecting equipment efficiency. Furthermore, the device is limited to a single type of pipette tip and has poor compatibility.

[0004] This invention proposes a suction head mounting buffer device, which includes:

[0005] The mounting base has a stepped hole through it. The stepped hole includes a first hole segment, a second hole segment, and a third hole segment arranged coaxially. The length of the second hole segment is greater than the length of the first hole segment, and the diameters of the first hole segment, the second hole segment, and the third hole segment decrease sequentially.

[0006] A sliding sleeve is disposed within the second hole segment, and its outer peripheral surface is slidably engaged with the inner surface of the second hole segment. One end of the sliding sleeve extends into the first hole segment, and a sliding disk is provided at the end. The outer peripheral surface of the sliding disk is slidably engaged with the inner surface of the first hole segment. The thickness of the sliding disk is less than the length of the first hole segment, and the length of the sliding sleeve is less than the sum of the lengths of the first hole segment and the second hole segment. The sliding sleeve has a through hole, and the through hole is coaxially arranged with the third hole segment.

[0007] A mounting cover, connected to the mounting base and disposed on the side of the first hole segment away from the second hole segment, the mounting cover having a through-hole with a retaining hole coaxially arranged with the through hole; and

[0008] A plurality of elastic elements are disposed within the first hole segment. The plurality of elastic elements are circumferentially distributed and the circumference formed by the plurality of elastic elements is coaxial with the first hole segment. One end of the plurality of elastic elements is connected to the stepped surface of the first hole segment, and the other end of the plurality of elastic elements is connected to the sliding disk.

[0009] As a further improvement to the above solution, the suction head mounting buffer device further includes:

[0010] A plurality of positioning pins are provided, all of which are disposed within the first hole section and are distributed circumferentially. The circumference of the positioning pins is coaxial with the first hole section. One end of each positioning pin is connected to the stepped surface of the first hole section, and the other end of each positioning pin slides through the sliding disc and is connected to the mounting cover.

[0011] As a further improvement to the above solution, the number of positioning pins is three and the three positioning pins are evenly distributed in a circle; three insertion holes one are recessed on the stepped surface of the first hole section, and three insertion holes two are recessed on the inner side of the mounting cover. The three positioning pins are respectively set to correspond one-to-one with the three insertion holes one and the three insertion holes two. One end of the positioning pin is inserted into the corresponding insertion hole one and the other end of the positioning pin is inserted into the corresponding insertion hole two.

[0012] As a further improvement to the above solution, a positioning pin is provided between any two adjacent elastic elements, and a plurality of mounting grooves are recessed on the stepped surface of the first hole section. One end of each of the elastic elements is installed in one of the mounting grooves, and the elastic elements can be completely retracted and stored in the corresponding mounting grooves.

[0013] As a further improvement to the above solution, the mounting base has a plurality of screw holes 1 recessed on both sides of the stepped hole on one side facing the mounting cover, and the mounting cover has a plurality of screw holes 2 through on both sides of the snap hole. The plurality of screw holes 1 are respectively provided in a one-to-one correspondence with the plurality of screw holes 2, and the corresponding screw holes 1 and screw holes 2 are connected by screws.

[0014] As a further improvement to the above solution, the mounting base is provided with a first mounting hole through both sides of the stepped hole, and the mounting cover is provided with a second mounting hole through both sides of the snap hole. The first mounting holes and the second mounting holes correspond to each other and are coaxially connected.

[0015] As a further improvement to the above solution, the stepped surface of the first hole section is also recessed to form several sliding holes, and the suction head mounting buffer device further includes:

[0016] A plurality of push rods are slidably fitted into a plurality of sliding holes, the length of each push rod being adapted to the depth of the sliding hole, and when each push rod is fully retracted into its corresponding sliding hole, the outer end face of the push rod is in the same plane as the stepped surface of the first hole segment; and

[0017] A plurality of micro motors are mounted in the mounting base and are respectively configured to correspond one-to-one with a plurality of sliding holes. The shaft of the micro motor extends into the corresponding sliding hole and is threadedly connected to the corresponding push rod. When the micro motor drives the corresponding push rod to slide outward in the corresponding sliding hole, the push rod pushes the sliding disk to slide.

[0018] As a further improvement to the above solution, the diameter of the card hole is larger than the diameter of the through hole.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. By incorporating an elastic element, this invention controls the force applied to the suction head in the Z-direction during suction head removal, effectively improving the overall efficiency of the equipment. It also allows for compatibility with various suction heads by utilizing the spring travel.

[0021] 2. This invention uses a push rod and a micro motor. The micro motor can drive the corresponding push rod to slide in the corresponding sliding hole so that it extends out of the sliding hole. This applies external force to the sliding plate, pushing it to move towards the mounting cover. The sliding plate then pushes the suction head outward, achieving contactless disassembly of the suction head. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a suction head mounting buffer device proposed in Embodiment 1 of the present invention;

[0023] Figure 2 for Figure 1 A bottom view;

[0024] Figure 3 for Figure 2 Sectional view of AA;

[0025] Figure 4 for Figure 1 Schematic diagram of the middle mounting base;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the mounting cover;

[0027] Figure 6 for Figure 1 Working principle diagram;

[0028] Figure 7 for Figure 2 Sectional view along the BB direction.

[0029] Figure descriptions: 1. Mounting base; 11. First hole section; 12. Second hole section; 13. Third hole section; 14. Insertion hole one; 15. Mounting groove; 16. Sliding hole; 17. Screw hole one; 18. Assembly hole one; 2. Sliding sleeve; 21. Sliding disc; 22. Through hole; 3. Mounting cover; 31. Locking hole; 32. Insertion hole two; 33. Screw hole two; 34. Assembly hole two; 4. Elastic element; 5. Positioning pin; 6. Push rod; 7. Miniature motor. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] Example 1

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 This embodiment provides a pipette tip mounting buffer device, which is installed on a pipette for picking up the pipette tip. The pipette tip mounting buffer device includes a mounting base 1, a sliding sleeve 2, a mounting cover 3, and several elastic elements 4. It may also include several push rods 6 and several micro motors 7.

[0035] Mounting base 1 has a stepped hole extending through it. The stepped hole includes a first hole segment 11, a second hole segment 12, and a third hole segment 13 arranged coaxially. The length of the second hole segment 12 is greater than the length of the first hole segment 11, and the diameters of the first hole segment 11, the second hole segment 12, and the third hole segment 13 decrease sequentially. Please refer to... Figure 4 The first hole segment 11 of the mounting base 1 has a plurality of insertion holes 14, a plurality of mounting grooves 15, and a plurality of sliding holes 16 recessed on its stepped surface. The insertion holes 14 are evenly distributed circumferentially, and the circumference of the insertion holes 14 is coaxial with the first hole segment 11. In this embodiment, there are three insertion holes 14; however, in other embodiments, the number of insertion holes 14 can be different. The mounting grooves 15 are also evenly distributed circumferentially, and the circumference of the mounting grooves 15 is coaxial with the first hole segment 11. In this embodiment, there are three mounting grooves 15, and one mounting groove 15 is provided between any two adjacent insertion holes 14; however, in other embodiments, the number of mounting grooves 15 can be different. The sliding holes 16 are also evenly distributed circumferentially, and the circumference of the sliding holes 16 is coaxial with the first hole segment 11. In this embodiment, there are three sliding holes 16; however, in other embodiments, the number of sliding holes 16 can be different. Mounting base 1 has a through-hole 18 on both sides of the stepped hole. Mounting base 1 also has two threaded holes on both sides of the first hole section 11, which are countersunk holes. It should be noted that the material of mounting base 1 is not limited. In this embodiment, mounting base 1 is made of metal.

[0036] The sliding sleeve 2 is disposed within the second hole segment 12, and its outer peripheral surface is in contact with and slidably engaged with the inner surface of the second hole segment 12. One end of the sliding sleeve 2 extends into the first hole segment 11, and a sliding disk 21 is integrally formed at this end. The outer peripheral surface of the sliding disk 21 is in contact with and slidably engaged with the inner surface of the first hole segment 11. The thickness of the sliding disk 21 is less than the length of the first hole segment 11, and the length of the sliding sleeve 2 is less than the sum of the lengths of the first hole segment 11 and the second hole segment 12. The sliding sleeve 2 has a through hole 22, and the through hole 22 is coaxially arranged with the third hole segment 13. It should be noted that the material of the sliding sleeve 2 is not limited. In this embodiment, the sliding sleeve 2 is made of metal.

[0037] The mounting cover 3 is detachably connected to the mounting base 1 and is located on the side of the first hole section 11 away from the second hole section 12. The mounting cover 3 has a through-hole 31, which is coaxially arranged with the through hole 22, and the diameter of the through hole 31 is larger than the diameter of the through hole 22. Please refer to... Figure 5The mounting cover 3 has three recessed holes 32 on one side facing the mounting base 1. These three holes 32 are evenly distributed circumferentially and correspond one-to-one with three first holes 14. Two screw holes 33 are formed through the mounting cover 3 on both sides of the locking hole 31. Four screw holes 17 correspond one-to-one with the four screw holes 33, and the corresponding screw holes 17 and screw holes 33 are connected by screws. An assembly hole 34 is formed through the mounting cover 3 on both sides of the locking hole 31. Two assembly holes 18 are coaxially connected to the two assembly holes 34, allowing the pipette tip mounting buffer device of this embodiment to be mounted on the pipette. It should be noted that the material of the mounting cover 3 is not limited; in this embodiment, the mounting cover 3 is made of metal.

[0038] Several locating pins 5 are all set in the first hole section 11 and are distributed circumferentially. The circumference of the locating pins 5 is coaxial with the first hole section 11. One end of the locating pins 5 is connected to the stepped surface of the first hole section 11, and the other end of the locating pins 5 slides through the sliding plate 21 and is connected to the mounting cover 2. There are three locating pins 5, which are evenly distributed circumferentially. The three locating pins 5 are respectively set one-to-one with three insertion holes 14 and three insertion holes 32. One end of the locating pin 5 is inserted into the corresponding insertion hole 14 and the other end of the locating pin 5 is inserted into the corresponding insertion hole 32.

[0039] Several elastic elements 4 are disposed within the first hole section 11. The elastic elements 4 are circumferentially distributed, and the circumference formed by the elastic elements 4 is coaxial with the first hole section 11. In this embodiment, the elastic elements 4 are springs, and there are three springs. One end of each of the three elastic elements 4 is connected to the bottom of one of the three mounting slots 15, and the other end of each of the three springs is connected to the sliding disk 21. In its natural state, the side of the sliding disk 21 facing the mounting sleeve is in contact with the inner side of the mounting sleeve. When an external force is applied to the sliding sleeve 2 to make it slide within the second hole section 12, the sliding sleeve 2 drives the sliding disk 21 to move. The sliding disk 21 compresses the three springs, causing the springs to contract. When the external force is large enough, the three springs can contract and be housed within the three mounting slots 15.

[0040] Based on the above structural settings, please combine them with... Figure 6 When a pipette tip needs to be installed, the Z-direction drive mechanism moves the pipette downwards along the Z-direction. The locking hole 31 aligns with the top of the pipette tip, and the tip snaps into the locking hole 31. As the pipette continues to move downwards, the tip contacts the sliding sleeve 2 and pushes the sliding sleeve 2 upwards to compress the spring until the tip is fully installed. By setting the elastic element 4, the force of installing the pipette tip in the Z-direction is controlled when removing the tip, effectively improving the overall working efficiency of the equipment. The spring stroke can also accommodate various pipette tips.

[0041] In this embodiment, for easy disassembly of the suction head, please refer to... Figure 7 This embodiment may also include three push rods 6 and three micro motors 7. The three push rods 6 are slidably installed in three sliding holes 16, and the length of the push rod 6 is adapted to the depth of the sliding hole 16. The three micro motors 7 are all installed in the mounting base 1, and the three micro motors 7 are respectively arranged in a one-to-one correspondence with the three sliding holes 16. The shafts of the three micro motors 7 extend into the three sliding holes 16 and are threadedly connected to the three push rods 6. When the shafts of the three micro motors 7 rotate, they can drive the three push rods 6 to slide in the corresponding sliding holes 16 to extend out of the sliding holes 16, so as to apply external force to the sliding disk 21 to push the sliding disk 21 to move towards the mounting cover 3. The sliding disk 21 will push the suction head to move outward, realizing non-contact disassembly of the suction head.

[0042] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A suction head mounting buffer device, characterized in that, It includes: The mounting base has a stepped hole through it. The stepped hole includes a first hole segment, a second hole segment, and a third hole segment arranged coaxially. The length of the second hole segment is greater than the length of the first hole segment, and the diameters of the first hole segment, the second hole segment, and the third hole segment decrease sequentially. A sliding sleeve is disposed within the second hole segment, and its outer peripheral surface is slidably engaged with the inner surface of the second hole segment. One end of the sliding sleeve extends into the first hole segment, and a sliding disk is provided at the end. The outer peripheral surface of the sliding disk is slidably engaged with the inner surface of the first hole segment. The thickness of the sliding disk is less than the length of the first hole segment, and the length of the sliding sleeve is less than the sum of the lengths of the first hole segment and the second hole segment. The sliding sleeve has a through hole, and the through hole is coaxially arranged with the third hole segment. A mounting cover, connected to the mounting base and disposed on the side of the first hole segment away from the second hole segment, the mounting cover having a through-hole with a retaining hole coaxially arranged with the through hole; and A plurality of elastic elements are disposed within the first hole segment. The plurality of elastic elements are circumferentially distributed and the circumference formed by the plurality of elastic elements is coaxial with the first hole segment. One end of the plurality of elastic elements is connected to the stepped surface of the first hole segment, and the other end of the plurality of elastic elements is connected to the sliding disk. The suction head mounting buffer device also includes: A plurality of positioning pins are provided, all of which are disposed within the first hole and are distributed in a circular pattern. The circumference of the positioning pins is coaxial with the first hole. One end of each positioning pin is connected to the stepped surface of the first hole, and the other end of each positioning pin slides through the sliding disc and is connected to the mounting cover. A positioning pin is provided between any two adjacent elastic elements. Several mounting grooves are recessed on the stepped surface of the first hole section. One end of several elastic elements is respectively installed in several mounting grooves and the elastic elements can be completely retracted and stored in the corresponding mounting grooves. The stepped surface of the first hole section is also recessed to form several sliding holes, and the suction head mounting buffer device further includes: A plurality of push rods are slidably fitted into a plurality of sliding holes, the length of each push rod being adapted to the depth of the sliding hole, and when each push rod is fully retracted into its corresponding sliding hole, the outer end face of the push rod is in the same plane as the stepped surface of the first hole segment; and a plurality of micro motors are mounted in the mounting base, each micro motor corresponding to one of the sliding holes, the shaft of each micro motor extending into the corresponding sliding hole and threadedly connected to the corresponding push rod, and when the micro motor drives the corresponding push rod to slide outward in the corresponding sliding hole, the push rod pushes the sliding disk to slide.

2. The suction head mounting buffer device according to claim 1, characterized in that, The number of positioning pins is three, and the three positioning pins are evenly distributed in a circle; three insertion holes one are recessed on the stepped surface of the first hole section, and three insertion holes two are recessed on the inner side of the mounting cover. The three positioning pins are respectively set to correspond one-to-one with the three insertion holes one and the three insertion holes two. One end of the positioning pin is inserted into the corresponding insertion hole one and the other end of the positioning pin is inserted into the corresponding insertion hole two.

3. The suction head mounting buffer device according to claim 1, characterized in that, The mounting base has several screw holes 1 recessed on both sides of the stepped hole on one side facing the mounting cover. The mounting cover has several screw holes 2 through it on both sides of the snap hole. The screw holes 1 and screw holes 2 are respectively arranged in a one-to-one correspondence and are connected by screws.

4. The suction head mounting buffer device according to claim 1, characterized in that, The mounting base is provided with a first mounting hole on both sides of the stepped hole, and the mounting cover is provided with a second mounting hole on both sides of the locking hole. The first mounting holes and the second mounting holes are coaxially connected in a one-to-one correspondence.

5. The suction head mounting buffer device according to claim 1, characterized in that, The diameter of the card hole is larger than the diameter of the through hole.

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