CN220803334U - Pipetting device - Google Patents
Pipetting device Download PDFInfo
- Publication number
- CN220803334U CN220803334U CN202322371705.1U CN202322371705U CN220803334U CN 220803334 U CN220803334 U CN 220803334U CN 202322371705 U CN202322371705 U CN 202322371705U CN 220803334 U CN220803334 U CN 220803334U
- Authority
- CN
- China
- Prior art keywords
- pushing mechanism
- rotating mechanism
- syringe body
- cavity
- syringe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000007788 liquid Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims description 44
- 239000007924 injection Substances 0.000 claims description 44
- 238000000034 method Methods 0.000 claims description 8
- 238000013016 damping Methods 0.000 description 7
- 230000000630 rising effect Effects 0.000 description 6
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000002257 embryonic structure Anatomy 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
Abstract
The utility model relates to the technical field of pipetting, in particular to a pipetting device which is matched with a capillary suction tube for use, comprising: the utility model discloses a cylinder type liquid suction device, which comprises a syringe, a rotating mechanism and a pushing mechanism, wherein the syringe is of a cylindrical structure as a whole, two ends of the syringe are provided with openings, the opening size of a first end of the syringe is larger than that of a second end of the syringe, at least part of the rotating mechanism is positioned in the syringe and is used for being fixed with the syringe, the pushing mechanism is arranged in the syringe, at least part of the pushing mechanism is connected with the rotating mechanism positioned in the syringe, and the pushing mechanism can be driven to move by the rotating mechanism.
Description
Technical Field
The utility model relates to the technical field of pipetting, in particular to a pipetting device.
Background
The existing pipetting device generally adopts a syringe structure to transfer liquid, the piston is pulled by hands to inject or suck the liquid, or adopts a dropper structure, and the liquid is sucked or discharged by pinching one end of the dropper and utilizing air pressure, but the mode is generally suitable for the test process with lower precision requirement, and because the operation is needed by a pushing mode or a pinching mode, the damping is unbalanced, the manual operation is easy to excessively push or excessively pinch, so that the error is larger;
the utility model discloses a pipette tip disclosed in China patent with a document number of CN219580574U, which can be matched with pipettes of different types by arranging a plurality of stepped surfaces, and has wider application range; meanwhile, a filter assembly is arranged between the outer shell and the inner shell, so that the sucked solution can be subjected to preliminary filtration between the outer shell and the inner shell, and further, the sucked solution is ensured not to contain unnecessary impurities, but is matched with the liquid dispenser mainly in a multi-step surface mode, and how to improve the liquid-transferring precision is not disclosed;
the Chinese patent with the document number of CN219578157U discloses a simple operation device for freezing embryos, which comprises a syringe, a rubber tube and a freezing tube, wherein the nipple end of the syringe is connected with one end of the rubber tube, and the other end of the rubber tube is connected with the freezing tube, but the main mode is that the pipetting operation is carried out through the syringe, and how to improve the precision of the pipetting process is not disclosed;
In summary, how to develop a pipetting device with simple operation and ensured accuracy in pipetting process becomes a problem to be solved at present.
Disclosure of utility model
The present utility model is directed to a pipetting device for solving the above problems.
In order to achieve the above purpose, the following technical scheme is provided:
A pipetting device for use with a capillary pipette, comprising: the injection syringe comprises a syringe body, a rotating mechanism and a pushing mechanism, wherein the syringe body is of a cylindrical structure, two ends of the syringe body are respectively provided with an opening, the opening of a first end of the syringe body is larger than that of a second end of the syringe body, at least part of the rotating mechanism is positioned in the syringe body and is used for being fixed with the syringe body, the pushing mechanism is arranged in the syringe body, at least part of the pushing mechanism is connected with the rotating mechanism positioned in the syringe body, the pushing mechanism can be driven to move by the rotating mechanism, the pushing mechanism comprises a piston, the liquid transferring device can be divided into two parts with different air pressures by the piston, and the liquid can be transferred through the opening of the second end of the syringe body.
Preferably, the injection cylinder can be divided into a first cavity and/or a second cavity with different air pressures by the piston and used for adjusting the air pressure in the pipetting process of the pipetting device, the pushing mechanism further comprises a hollow connecting rod, the rotating mechanism comprises a screw rod used for driving the pushing mechanism, an inner thread matched with the screw rod outer thread is arranged on the inner side wall of the connecting rod along the circumferential direction, one end of the connecting rod is fixedly connected with the piston, the other end of the connecting rod is in threaded connection with the screw rod, and the rotating mechanism can drive the pushing mechanism to move.
Preferably, the rotating mechanism further comprises a screw knob and a positioning block, the screw knob is of a cylindrical structure, the end face of the screw knob is attached to the end face of the first end of the injection cylinder, the screw knob can rotate around the axis along the end face of the injection cylinder, one end, far away from the connecting rod, of the screw rod is fixedly connected to the middle of the screw knob, the positioning block is sleeved on the screw rod and correspondingly located in the injection cylinder, the injection cylinder is further provided with a first bulge in an inward extending mode, and at least part of the positioning block is abutted to the first bulge and can rotate relatively.
Preferably, the first cavity is correspondingly arranged at a position between the piston and the first end of the injection cylinder, the second cavity is correspondingly arranged at a position between the piston and the second end of the injection cylinder, the first protrusions are arranged on the inner wall of the injection cylinder at intervals, and then the first cavity in the injection cylinder is communicated with the outside.
Preferably, when the pushing mechanism is driven to move by the rotating mechanism, the first cavity is exhausted and/or is charged through the interval between the first protrusions, and the second cavity is exhausted and/or is charged through the opening of the second end.
Preferably, the second end of the syringe barrel is provided with an injection connector extending outwards, and the injection connector is detachably connected with a capillary suction tube and used for transferring liquid.
The beneficial effects of the utility model are as follows:
1. according to the utility model, the pushing mechanism is driven to move by the cooperation of the pushing mechanism, the rotating mechanism and the injection cylinder in a rotating mode, so that the position of the pushing mechanism is convenient to precisely control;
2. The first bulge is in butt joint with the positioning block, so that the operation of the limiting positioning block can be realized, and the rotating mechanism is connected with the pushing mechanism through the screw rod, so that the rotating mechanism is limited at the first end of the injection cylinder, the screw rod is fixed at the position in the injection cylinder, the rotating mechanism is ensured to have rotational freedom degree, and the screw rod is prevented from deflecting;
3. According to the utility model, the size of the interval space between the first bulges can be adjusted, so that damping control of different degrees in the operation process is realized, the stable rising of the piston is facilitated, accurate liquid suction is realized, when the interval space is smaller, the gas in the first cavity is blocked from being discharged, the rising damping of the piston is larger, and when the interval space is larger, the gas in the first cavity is smoothly discharged, and the rising damping of the piston is smaller.
Drawings
FIG. 1 is a schematic view of the use of the present utility model in combination with a capillary suction tube;
FIG. 2 is a schematic diagram of the structure of the present utility model;
FIG. 3 is a schematic view of the connection relationship between the positioning block and the first protrusion;
In the figure: 10-syringe, 101-first cavity, 102-second cavity, 103-first protrusion, 104-injection joint, 20-rotating mechanism, 201-screw rod, 202-screw knob, 203-positioning block, 30-pushing mechanism, 301-piston, 302-connecting rod, 40-capillary suction tube.
Detailed Description
The technical solutions of the structural schematic diagrams in the embodiments of the present utility model will be clearly and fully described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-3, a pipetting device for use with a capillary pipette 40, comprising: the injection tube 10, the rotating mechanism 20 and the pushing mechanism 30 are integrally of a cylindrical structure, two ends of the injection tube 10 are provided with openings, the opening size of a first end of the injection tube 10 is larger than that of a second end of the injection tube 10, at least part of the rotating mechanism 20 is positioned in the injection tube 10 and is used for being fixed with the injection tube 10, the pushing mechanism 30 is arranged in the injection tube 10, at least part of the pushing mechanism 30 is connected with the rotating mechanism 20 positioned in the injection tube 10, the pushing mechanism 30 can be driven to move by the rotating mechanism 20, the pushing mechanism 30 comprises a piston 301, a liquid transferring device can be divided into two parts with different air pressures by the piston 301, and the injection tube 10 can transfer liquid through the opening of the second end of the injection tube; the pushing mechanism 30, the rotating mechanism 20 and the injection cylinder 10 are matched, and the pushing mechanism 30 is driven to move in a rotating mode, so that the position of the pushing mechanism 30 is convenient to precisely control;
In some embodiments, the syringe 10 may be separated into a first cavity 101 and/or a second cavity 102 with different air pressures by the piston 301, for adjusting the air pressure in the pipetting process of the pipetting device, the pushing mechanism 30 further includes a hollow connecting rod 302, the rotating mechanism 20 includes a screw rod 201 for driving the pushing mechanism 30, an inner side wall of the connecting rod 302 is provided with an inner thread matching with an outer thread of the screw rod 201 along a circumferential direction, one end of the connecting rod 302 is fixedly connected with the piston 301, and the other end of the connecting rod 302 is in threaded connection with the screw rod 201, so that the rotating mechanism 20 can drive the pushing mechanism 30 to move;
In some embodiments, the rotating mechanism 20 further includes a screw knob 202 and a positioning block 203, the screw knob 202 is in a cylindrical structure, the end face of the screw knob 202 is attached to the first end face of the syringe 10, so that the screw knob 202 can rotate around the central axis along the end face of the syringe 10, one end of the screw rod 201 away from the connecting rod 302 is fixedly connected to the middle part of the screw knob 202, the positioning block 203 is sleeved on the screw rod 201 and correspondingly positioned in the syringe 10, the syringe 10 is further provided with a first protrusion 103 extending inwards, and at least part of the positioning block 203 is abutted against the first protrusion 103 and can rotate relatively; the operation of the limiting and positioning block 203 can be realized through the mutual abutting of the first bulge 103 and the positioning block 203, and the rotating mechanism 20 is connected with the pushing mechanism 30 through the screw rod 201, so that the rotating mechanism 20 is limited at the first end of the injection cylinder 10, the screw rod 201 is fixed at the position in the injection cylinder 10, the rotating mechanism 20 is ensured to have a rotational degree of freedom, and the screw rod 201 is prevented from deflecting;
In some embodiments, the first cavity 101 is correspondingly disposed between the piston 301 and the first end of the syringe 10, the second cavity 102 is correspondingly disposed between the piston 301 and the second end of the syringe 10, and the first protrusions 103 are disposed on the inner wall of the syringe 10 at intervals, so that the first cavity 101 in the syringe 10 is communicated with the outside;
In some embodiments, when the pushing mechanism 30 is driven by the rotating mechanism 20, the first cavity 101 is exhausted and/or is charged through the space between the first protrusions 103, and the second cavity 102 is exhausted and/or is charged through the opening of the second end;
In this embodiment, when liquid is required to be sucked, the device is connected with the capillary suction tube 40, the screw knob 202 is rotated from one direction, so that the piston 301 rises to approach the first end, at this time, the gas in the first cavity 101 can be discharged from the space between the first protrusions 103, damping control of different degrees can be realized in the operation process by adjusting the size of the space between the first protrusions 103, accurate liquid suction can be realized by stably rising the piston 301, when the space is smaller, the gas discharge in the first cavity 101 is blocked, the rising damping of the piston 301 is larger, when the space is larger, the gas discharge in the first cavity 101 is smooth, the rising damping of the piston 301 is smaller, after the piston 301 rises, the volume of the second cavity 102 is larger, the gas pressure in the second cavity 102 is reduced, the atmospheric pressure presses the liquid to be sucked into the capillary suction tube 40, and when the liquid is required to be discharged, the reverse operation can be realized;
In some embodiments, the second end of the syringe barrel 10 is provided with an injection fitting 104 extending outwardly, the injection fitting 104 being detachably connected to the capillary tube 40 for transferring liquid.
Claims (6)
1. A pipetting device for use with a capillary pipette, characterized in that: comprising the following steps: the injection syringe comprises a syringe body, a rotating mechanism and a pushing mechanism, wherein the syringe body is of a cylindrical structure, two ends of the syringe body are respectively provided with an opening, the opening of a first end of the syringe body is larger than that of a second end of the syringe body, at least part of the rotating mechanism is positioned in the syringe body and is used for being fixed with the syringe body, the pushing mechanism is arranged in the syringe body, at least part of the pushing mechanism is connected with the rotating mechanism positioned in the syringe body, the pushing mechanism can be driven to move by the rotating mechanism, the pushing mechanism comprises a piston, the liquid transferring device can be divided into two parts with different air pressures by the piston, and the liquid can be transferred through the opening of the second end of the syringe body.
2. The pipetting device of claim 1, wherein: the injection tube can be divided into a first cavity and/or a second cavity with different air pressures by the piston and used for adjusting the air pressure in the pipetting process of the pipetting device, the pushing mechanism further comprises a hollow connecting rod, the rotating mechanism comprises a screw rod used for driving the pushing mechanism, an inner thread matched with the screw rod outer thread is arranged on the inner side wall of the connecting rod along the circumferential direction, one end of the connecting rod is fixedly connected with the piston, the other end of the connecting rod is in threaded connection with the screw rod, and the rotating mechanism can drive the pushing mechanism to move.
3. The pipetting device according to claim 2, wherein: the rotating mechanism further comprises a screw knob and a positioning block, the screw knob is of a cylindrical structure, the end face of the screw knob is attached to the end face of the first end of the injection cylinder, the screw knob can rotate around the axis along the end face of the injection cylinder, one end of the screw rod, which is far away from the connecting rod, is fixedly connected to the middle of the screw knob, the positioning block is sleeved on the screw rod and is correspondingly positioned in the injection cylinder, the injection cylinder is further provided with a first bulge in an inward extending mode, and at least part of the positioning block is abutted to the first bulge and can rotate relatively.
4. A pipetting device according to claim 3, wherein: the first cavity is correspondingly arranged at a position between the piston and the first end of the injection cylinder, the second cavity is correspondingly arranged at a position between the piston and the second end of the injection cylinder, the first protrusions are arranged on the inner wall of the injection cylinder at intervals, and then the first cavity in the injection cylinder is communicated with the outside.
5. The pipetting device of claim 4 wherein: when the pushing mechanism is driven to move by the rotating mechanism, the first cavity is exhausted and/or is charged through the interval between the first bulges, and the second cavity is exhausted and/or is charged through the opening of the second end.
6. The pipetting device of claim 5 wherein: the second end of the injection cylinder is provided with an injection joint in an outward extending mode, and the injection joint is detachably connected with the capillary suction tube and used for transferring liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322371705.1U CN220803334U (en) | 2023-09-01 | 2023-09-01 | Pipetting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322371705.1U CN220803334U (en) | 2023-09-01 | 2023-09-01 | Pipetting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220803334U true CN220803334U (en) | 2024-04-19 |
Family
ID=90677525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322371705.1U Active CN220803334U (en) | 2023-09-01 | 2023-09-01 | Pipetting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220803334U (en) |
-
2023
- 2023-09-01 CN CN202322371705.1U patent/CN220803334U/en active Active
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| GR01 | Patent grant |