Multi-channel variable-distance pipetting device

Abstract

The utility model relates to the technical field of multi-channel pipetting, in particular to a multi-channel variable-distance pipetting device which comprises a pipetting device main body, the air pump is arranged in the pipetting device main body and is used for sucking and discharging liquid; the flow speed adjusting button is arranged on the pipetting device main body, is connected with the air pump and is used for adjusting the rotating speed of the air pump; the switch is arranged on the pipetting device main body, is connected with the air pump and is used for controlling the starting and closing of the air pump; the top end of the circulating pipe is communicated with the air pump; and the multi-channel assembly is arranged at the bottom end of the runner pipe and used for sucking and discharging multiple groups of liquid at the same time. Through cooperation between the horizontal adjusting device and the multi-channel assemblies, the distance between the multi-channel assemblies can be adjusted by utilizing the horizontal adjusting device, so that liquid suction can be carried out on a culture bottle with a larger size, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-channel liquid transfer, in particular to a multi-channel variable-distance liquid transfer device. Background Art

[0002] Cell culture is indispensable in clinical treatment and biological research. When cells proliferate to a certain extent, contact inhibition occurs. In order to allow the cells to continue to grow and increase the number of cells, they need to be cultured in multiple bottles from one culture bottle. This process requires a pipette to move cells and nutrient solution.

[0003] However, in order to improve the efficiency of pipetting, most existing pipetting devices use a multi-channel method to perform pipetting. Since different culture bottles have different sizes and the distance between each pipette is limited, when the size of the culture bottle is larger than the distance between the pipettes, only one pipette can be inserted into the culture bottle, while the remaining pipettes will be exposed to the air. The distance between each pipette cannot be adjusted, so that the culture bottle with a larger size cannot be aspirated, which is inconvenient to use. Utility Model Content

[0004] The utility model aims to solve the problem that the existing liquid transfer device cannot adjust the distance between each liquid transfer tube, so that it cannot transfer liquid to a culture bottle with a larger size, which causes inconvenience in use.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A multi-channel variable-distance pipetting device, comprising:

[0007] a pipetting device body;

[0008] An air pump, disposed inside the main body of the liquid transfer device, for aspirating and discharging liquid;

[0009] A flow rate adjustment button, which is arranged on the main body of the liquid transfer device and connected to the air pump, and is used to adjust the rotation speed of the air pump;

[0010] A switch, disposed on the main body of the liquid transfer device and connected to the air pump, for controlling the start and stop of the air pump;

[0011] A circulation pipe, the top end of which is connected to the air pump;

[0012] A multi-channel assembly, disposed at the bottom end of the flow tube, for simultaneously sucking and discharging multiple groups of liquids;

[0013] Two sets of level adjustment devices are symmetrically arranged on both sides of the pipetting device body and connected to the multi-channel component for adjusting the spacing.

[0014] Preferably, the multi-channel component comprises:

[0015] A communication channel is provided at the bottom end of the flow pipe and is communicated with the flow pipe;

[0016] A fixed sleeve, disposed in the middle below the communication channel and connected to the communication channel;

[0017] Two groups of movable sleeves are symmetrically arranged on both sides of the fixed sleeve and are connected to the communication channel;

[0018] Three groups of pipettes are sequentially arranged inside the fixed sleeve and the two groups of movable sleeves, and are used to store liquids that need to be moved.

[0019] Preferably, the multi-channel assembly further comprises: a first sealing ring; the first sealing ring is arranged between the movable sleeve and the communicating channel, and is used for sealing between the movable sleeve and the communicating channel.

[0020] Preferably, it further comprises: a second sealing ring; the second sealing ring is arranged above the pipette for sealing.

[0021] Preferably, a plurality of notches are provided on the surface of the pipette.

[0022] Preferably, the level adjustment device comprises:

[0023] A housing connected to the communication channel;

[0024] A worm, disposed inside the housing;

[0025] A rotating disk connected to the worm and used to drive the worm to rotate;

[0026] A worm wheel is disposed above the worm and meshedly connected with the worm;

[0027] A rotating plate, a surface of which is provided with a first sliding groove, one end of which is coaxially arranged with the worm gear so as to enable the rotating plate to rotate along with the worm gear;

[0028] The connecting plate is composed of a vertical plate and a first cylindrical pin, and one end of the vertical plate is connected to the first cylindrical pin; the first cylindrical pin is arranged in the first sliding groove and is slidingly connected to the rotating plate through the first sliding groove; the bottom end of the vertical plate is fixedly connected to the movable sleeve.

[0029] Preferably, it further comprises: a battery pack; the battery pack is arranged inside the main body of the pipetting device, and the battery pack is electrically connected to the air pump to provide power to the air pump.

[0030] Preferably, it also includes: a charging socket; the charging socket is arranged at the bottom end of the pipetting device body and is connected to the battery pack for charging the battery pack.

[0031] Preferably, it further comprises: a limiting device; the limiting device is arranged on the surface of the pipette to limit the position of the pipette.

[0032] Preferably, the limiting device comprises:

[0033] A hollow cylinder, sleeved on the surface of the pipette and slidably connected with the pipette;

[0034] A limiting member is arranged inside the hollow cylinder, one end of the limiting member is provided with a second slide groove, and the other end of the limiting member extends into the notch on the surface of the pipette, so as to limit the position of the pipette;

[0035] A support member is disposed between the limiting member and the hollow cylinder, and one end of the support member is rotatably connected to the limiting member;

[0036] The movable member is composed of a first rod, a second rod and a second cylindrical pin, and one end of the second rod is vertically connected to one end of the first rod, and the other end is connected to the second cylindrical pin; the second cylindrical pin is arranged in the second sliding groove, and is slidably connected to the limiting member through the second sliding groove.

[0037] The beneficial effect of the utility model is that: through the cooperation between the level adjustment device and the multi-channel components, the distance between the multi-channel components can be adjusted by using the level adjustment device, so that liquid can be aspirated from a culture bottle with a larger size, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the structure of the utility model;

[0039] Figure 2 for Figure 1 Schematic diagram of the main plan view of the internal connection structure;

[0040] Figure 3 for Figure 1 The left side plan view of the middle part connection structure;

[0041] Figure 4 for Figure 3 Schematic diagram of the connection structure at A in the middle;

[0042] Figure 5 for Figure 2 Schematic diagram of the connection structure at B in the middle.

[0043] In the figure: 1. main body of the pipetting device, 2. circulation tube, 3. connecting channel, 4. fixed sleeve, 5. pipette, 6. nameplate, 7. display screen, 8. flow rate adjustment button, 9. switch, 10. charging jack, 11. movable sleeve, 12. first sealing ring, 13. housing, 14. worm, 15. turntable, 16. worm gear, 17. rotating plate, 18. connecting plate, 19. hollow cylinder, 20. limit member, 21. support member, 22. movable member, 23. second sealing ring. DETAILED DESCRIPTION

[0044] The utility model is further described below in conjunction with the accompanying drawings:

[0045] This embodiment:

[0046] See also Figure 1-5 In this embodiment: a multi-channel variable-distance pipetting device includes: a pipetting device body 1, an air pump, a flow rate adjustment button 8, a switch 9, a flow tube 2, a multi-channel component and two sets of level adjustment devices.

[0047] Among them, the air pump is arranged inside the main body 1 of the pipetting device for sucking and discharging liquid. The air pump is a prior art and will not be described in detail here; the flow rate adjustment button 8 is arranged on the main body 1 of the pipetting device and is connected to the air pump, which is used to adjust the rotation speed of the air pump, thereby controlling the speed at which the air pump sucks in and discharges liquid; the switch 9 is arranged on the main body 1 of the pipetting device and is connected to the air pump, which is used to control the start and stop of the air pump; the top of the circulation tube 2 is connected to the air pump, and the air pump will extract the air in the circulation tube 2 and use air pressure to allow liquid to enter; the multi-channel component is arranged at the bottom end of the circulation tube 2, which is used to simultaneously absorb and discharge multiple groups of liquids; two groups of horizontal adjustment devices are symmetrically arranged on both sides of the main body 1 of the pipetting device and are connected to the multi-channel component for adjusting the spacing.

[0048] The multi-channel component comprises: a connecting channel 3 , a fixed sleeve 4 , two groups of movable sleeves 11 and three groups of pipettes 5 .

[0049] In this embodiment, the connecting channel 3 is arranged at the bottom end of the circulation tube 2 and is connected to the circulation tube 2; the fixed sleeve 4 is arranged in the middle below the connecting channel 3 and is connected to the connecting channel 3; the two groups of movable sleeves 11 are symmetrically arranged on both sides of the fixed sleeve 4 and are connected to the connecting channel 3; the three groups of pipettes 5 are arranged in sequence inside the fixed sleeve 4 and the two groups of movable sleeves 11, and are used to store liquids that need to be moved. The fixed sleeve 4 and the movable sleeve 11 can be disassembled, so that the pipette 5 and the second sealing ring 23 can be disassembled and replaced at the same time. The specifications of the pipette 5 are 2ml, 5ml, 10ml, 25ml, and 50ml.

[0050] The multi-channel component further includes: a first sealing ring 12 ; the first sealing ring 12 is disposed between the moving sleeve 11 and the communicating channel 3 , and is used for sealing between the moving sleeve 11 and the communicating channel 3 .

[0051] The multi-channel variable-distance pipetting device further includes: a second sealing ring 23 ; the second sealing ring 23 is disposed above the pipette 5 for sealing; the second sealing rings 23 on both sides seal between the pipette 5 and the movable sleeve 11 on both sides.

[0052] A plurality of notches are provided on the surface of the pipette 5 , and the notches are annular notches connected end to end in the horizontal direction.

[0053] The level adjustment device comprises: a housing 13 , a worm 14 , a rotating disk 15 , a worm wheel 16 , a rotating plate 17 and a connecting plate 18 .

[0054] Specifically, the housing 13 is connected to the connecting channel 3; the worm 14 is arranged inside the housing 13; the turntable 15 is connected to the worm 14 for driving the worm 14 to rotate; the worm wheel 16 is arranged above the worm 14 and meshingly connected with the worm 14. Since the transmission ratio between the worm 14 and the worm wheel 16 is relatively large, the rotation speed of the worm wheel 16 is relatively slow; a first slide groove is provided on the surface of the rotating plate 17, and one end of the rotating plate 17 is coaxially arranged with the worm wheel 16 for making the rotating plate 17 rotate with the worm wheel 16; the connecting plate 18 is composed of a vertical plate and a first cylindrical pin, and one end of the vertical plate is connected to the first cylindrical pin; the first cylindrical pin is arranged in the first slide groove and is slidably connected to the rotating plate 17 through the first slide groove. When the rotating plate 17 rotates, the sliding between the first slide groove and the first cylindrical pin causes the connecting plate 18 to move horizontally; the bottom end of the vertical plate is fixedly connected to the moving sleeve 11, and the connecting plate 18 drives the moving sleeve 11 to move.

[0055] As an implementation mode of this embodiment, the user rotates the turntable 15, the turntable 15 will drive the worm 14 to rotate, the worm 14 will drive the worm wheel 16 to rotate slowly at the same time, the worm wheel 16 will drive the rotating plate 17 to rotate, the rotating plate 17 will slide between the first slide groove and the first cylindrical pin to make the connecting plate 18 move horizontally, the connecting plate 18 drives the movable sleeve 11 to move, thereby changing the distance between the movable sleeve 11 and the fixed sleeve 4, which can be adjusted according to the size of the culture bottle for easy use.

[0056] The multi-channel variable-distance pipetting device also includes: a battery pack; the battery pack is arranged inside the pipetting device body 1, and the battery pack is electrically connected to the air pump to provide power for the air pump. This battery pack is a prior art and will not be described in detail here.

[0057] The multi-channel variable-distance pipetting device further includes: a charging socket 10; the charging socket 10 is disposed at the bottom end of the pipetting device body 1 and is connected to the battery pack for charging the battery pack.

[0058] The multi-channel variable-distance pipetting device further includes: a limiting device; the limiting device is arranged on the surface of the pipette 5 and is used to limit the position of the pipette 5 .

[0059] The limiting device comprises: a hollow cylinder 19 , a limiting member 20 , a supporting member 21 and a moving member 22 .

[0060] Among them, the hollow cylinder 19 is sleeved on the surface of the pipette 5 and is slidably connected with the pipette 5, and the pipette 5 can move vertically along the hollow cylinder 19; the limiting member 20 is arranged inside the hollow cylinder 19, and one end of the limiting member 20 is provided with a second slide groove, and the other end extends to the notch on the surface of the pipette 5, which is used to limit the position of the pipette 5; the supporting member 21 is arranged between the limiting member 20 and the hollow cylinder 19, and one end of the supporting member 21 is rotatably connected with the limiting member 20, and a torsion spring is connected between the supporting member 21 and the limiting member 20, and when the bottom end of the limiting member 20 rotates outward, the torsion spring will be compressed; the moving member 22 is composed of a first rod, a second rod and a second cylindrical pin, and one end of the second rod is vertically connected to one end of the first rod, and the other end is connected to the second cylindrical pin; the second cylindrical pin is arranged in the second slide groove, and is slidably connected to the limiting member 20 through the second slide groove.

[0061] As an implementation method of this embodiment, the user pushes the moving member 22 toward the middle, and the moving member 22 will slide between the second slide groove and the second cylindrical pin, so that the limit member 20 rotates along the support member 21, so that the bottom end of the limit member 20 rotates outward and disengages from the notch of the pipette 5, and at the same time compresses the torsion spring. At this time, the pipette 5 is pulled downward to extend the pipette 5. After reaching the appropriate position, the moving member 22 is released, and the limit member 20 rotates under the action of the torsion spring rebound force, thereby inserting into the corresponding notch at this time to limit the position of the pipette 5.

[0062] Working principle:

[0063] When the multi-channel variable-distance pipetting device is in use, first, the user arranges the culture bottles in order and places them on the desktop, and then rotates the turntable 15, which drives the worm 14 to rotate, and the worm 14 drives the worm gear 16 to rotate slowly at the same time, and the worm gear 16 drives the rotating plate 17 to rotate, and the rotating plate 17 slides between the first slide groove and the first cylindrical pin to make the connecting plate 18 move horizontally, and the connecting plate 18 drives the movable sleeve 11 to move, thereby changing the distance between the movable sleeve 11 and the fixed sleeve 4, which can be adjusted according to the size of the culture bottle for easy use, and then pushes the moving member 22 toward the middle, and the moving member 22 slides between the second slide groove and the second cylindrical pin to make the limiting member 20 rotate along the supporting member 21, so that the bottom end of the limiting member 20 rotates outward and disengages. The notch of the pipette 5 is opened, and the torsion spring is compressed at the same time. At this time, the pipette 5 is pulled downward to extend the pipette 5. After reaching the appropriate position, the moving part 22 is released, and the limiting part 20 will rotate under the action of the torsion spring rebound force, so as to be inserted into the corresponding notch at this time to limit the position of the pipette 5. Then, the pipette 5 is inserted into the corresponding culture bottle, and the switch 9 is pressed to start the air pump in the pipette device body 1. The air pump will extract the gas in the flow tube 2, and use the external pressure to make the liquid flow into the pipette 5. The flow rate adjustment button 8 can control the speed of the air pump to suck and discharge the liquid. After completing the aspiration, press the switch 9 again to make the liquid stay in the pipette 5, thereby moving to the remaining position to complete the use of this multi-channel variable-distance pipetting device.

[0064] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A multi-channel variable-distance pipetting device, characterized in that: include: A pipetting device body (1); An air pump, arranged inside the liquid transfer device body (1), for aspirating and discharging liquid; A flow rate adjustment button (8), which is arranged on the liquid transfer device body (1) and is connected to the air pump and is used to adjust the rotation speed of the air pump; A switch (9), which is arranged on the liquid transfer device body (1) and is connected to the air pump, and is used to control the start and stop of the air pump; A circulation pipe (2), the top end of which is connected to the air pump; A multi-channel assembly, arranged at the bottom end of the flow tube (2), for simultaneously sucking and discharging multiple groups of liquids; Two sets of level adjustment devices are symmetrically arranged on both sides of the pipetting device body (1) and connected to the multi-channel component for adjusting the spacing.

2. The multi-channel variable-distance pipetting device according to claim 1, characterized in that: The multi-channel assembly comprises: A communication channel (3) is arranged at the bottom end of the flow pipe (2) and is connected to the flow pipe (2); A fixed sleeve (4) is arranged in the middle below the communication channel (3) and is connected to the communication channel (3); Two groups of movable sleeves (11) are symmetrically arranged on both sides of the fixed sleeve (4) and are connected to the communication channel (3); Three groups of pipettes (5) are sequentially arranged inside the fixed sleeve (4) and the two groups of movable sleeves (11) for storing liquids to be moved.

3. The multi-channel variable-distance pipetting device according to claim 2, characterized in that: The multi-channel component further comprises: a first sealing ring (12); the first sealing ring (12) is arranged between the movable sleeve (11) and the connecting channel (3) and is used for sealing between the movable sleeve (11) and the connecting channel (3).

4. The multi-channel variable-distance pipetting device according to claim 2, characterized in that: Also includes: A second sealing ring (23); the second sealing ring (23) is arranged above the pipette (5) and is used for sealing.

5. The multi-channel variable-distance pipetting device according to claim 2, characterized in that: A plurality of notches are provided on the surface of the pipette (5).

6. The multi-channel variable-distance pipetting device according to claim 2, characterized in that: The level adjustment device comprises: A housing (13) connected to the communication channel (3); A worm (14) is arranged inside the housing (13); A rotating disk (15) connected to the worm (14) and used to drive the worm (14) to rotate; A worm wheel (16) is disposed above the worm (14) and meshedly connected with the worm (14); A rotating plate (17), wherein a first sliding groove is provided on the surface of the rotating plate (17), and one end of the rotating plate (17) is coaxially arranged with the worm gear (16) so as to enable the rotating plate (17) to rotate along with the worm gear (16); The connecting plate (18) is composed of a vertical plate and a first cylindrical pin, and one end of the vertical plate is connected to the first cylindrical pin; the first cylindrical pin is arranged in the first sliding groove and is slidably connected to the rotating plate (17) through the first sliding groove; the bottom end of the vertical plate is fixedly connected to the movable sleeve (11).

7. The multi-channel variable-distance pipetting device according to claim 1, characterized in that: Also includes: A battery pack; the battery pack is arranged inside the main body (1) of the liquid transfer device, and the battery pack is electrically connected to the air pump to provide power to the air pump.

8. The multi-channel variable-distance pipetting device according to claim 7, characterized in that: Also includes: A charging socket (10); the charging socket (10) is arranged at the bottom end of the pipetting device body (1) and is connected to the battery pack for charging the battery pack.

9. The multi-channel variable-distance pipetting device according to claim 2, characterized in that: Also includes: A limiting device; the limiting device is arranged on the surface of the pipette (5) and is used to limit the position of the pipette (5).

10. The multi-channel variable-distance pipetting device according to claim 9, characterized in that: The limiting device comprises: A hollow cylinder (19) is sleeved on the surface of the pipette (5) and is slidably connected to the pipette (5); A limiting member (20) is arranged inside the hollow cylinder (19), one end of the limiting member (20) is provided with a second slide groove, and the other end extends into the notch on the surface of the pipette (5), so as to limit the position of the pipette (5); A support member (21) is disposed between the limiting member (20) and the hollow cylinder (19), and one end of the support member (21) is rotatably connected to the limiting member (20); The movable member (22) is composed of a first rod, a second rod and a second cylindrical pin, wherein one end of the second rod is vertically connected to one end of the first rod, and the other end is connected to the second cylindrical pin; the second cylindrical pin is arranged in the second sliding groove, and is slidably connected to the limiting member (20) through the second sliding groove.

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